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Home My WebLink About20260315 RECEIVED FEB 0 5 2026 WELD COUNTY NOTICE OF FILING APPLICATION COMMISSIONERS FOR COLORADO MINED LAND RECLAMATION PERMIT FOR REGULAR(112)CONSTRUCTION MATERIALS EXTRACTION OPERATION NOTICE TO THE BOARD OF COUNTY COMMISSIONERS Weld COUNTY Northern Colorado Constructors (the"Applicant/Operator")has applied for a Regular(112)reclamation permit from the Colorado Mined Land Reclamation Board(the"Board")to conduct the extraction of construction materials operations in Weld County. The attached information is being provided to notify you of the location and nature of the proposed operation. The entire application is on file with the Division of Reclamation,Mining,and Safety(the "Division")and the local county clerk and recorder. The applicant/operator proposes to reclaim the affected land to developed water resource use. Pursuant to Section 34-32.5-116(4)(m),C.R.S.,the Board may confer with the local Board of County Commissioners before approving of the post-mining land use. Accordingly,the Board would appreciate your comments on the proposed operation. Please note that,in order to preserve your right to a hearing before the Board on this application,you must submit written comments on the application within twenty(20)days of the date of last publication of notice pursuant to Section 34-32.5-112(10),C.R.S. If you would like to discuss the proposed post-mining land use,or any other issue regarding this application,please contact the Division of Reclamation,Mining,and Safety, 1313 Sherman Street,Room 215,Denver,Colorado 80203,(303)866-3567. NOTE TO APPLICANT/OPERATOR: You must attach a copy of the application form to this notice. If this is a notice of a change to a previously filed application you must either attach a copy of the changes, or attach a complete and accurate description of the change. ��b\iGe� e� cc. . LL��\mom '�Arn\�JL\lca\hc�r.1 2026 0315 ua \ �� ago NX,)CC-41 c\r-\w\ \-.A� \ s�> \ \ate Application for: DRMS 112 Reclamation Operation Amendment NCCI Pit #1 M-2001 - 107 N NW In. �► — agmir NORTHERN COLORADO CONSTRUCTORS, INC . 9075 WCR 10 Fort Lupton, CO 80621 303-857-1754 Prepared By: J&T Consulting, Inc. 305 Denver Avenue — Suite D Fort Lupton, CO 80621 Ph: 303-857-6222 www.j-tconsulting.corn STATE OF COLORADO DIVISION OF RECLAMATION,MINING AND SAFETY Department of Natural Resources 1313 Sherman St.,Room 215 Denver,Colorado 80203 nOLORADO Phone:(303)866-3567 FAX:(303)832 8106 CONSTRUCTION MATERIAL REGULAR(112)OPERATION RECLAMATION PERMIT APPLICATION PACKAGE APPLICABILITY: This application package is for a construction materials operation which affects 10 acres or more. If you plan to conduct a construction materials extraction operation which meets these criteria,please follow the instructions provided in this package, in the Rules and Regulations, and in the Colorado Land Reclamation Act for the Extraction of Construction Materials, as required. RECOMMENDATIONS PRIOR TO FILING: The Construction Material Rules and Regulations (the Colorado Land Reclamation Act for the Extraction of Construction Materials, Section 34-32.5-101, et seq., C.R.S., and 2 CCR 407-1) and the Colorado Mined Land Reclamation Board (the "Board")regulate the permitting,operational and reclamation requirements for all construction material extraction operations in Colorado. It is your obligation to comply with the Act and Regulations. You are encouraged to obtain and review a copy of the Rules, available for $8.00 from the Division of Reclamation, Mining, and Safety(the "Office"). In order to submit your application properly,it is recommended that you review the Act and: Rule 1.1 Definitions; Rule 1.4.1 Application Review and Consideration Process; Rule 1.4.5 Specific Requirements for Regular 112 Operations; Rule 1.6 Public Notice Procedures; Rule 3.1 Reclamation Performance Standards; Rule 3.3.1 Operating without a Permit-Penalty; Rule 4 Performance Warranties and Financial Warranties; Rule 6 Permit Application Exhibit Requirements; Rule 6.2 General Requirements of Exhibits; Rule 6.4 Specific Permit Application Exhibit Requirements;and Rule 6.5 Geotechnical Stability Exhibit. It is recommended that you contact the agencies listed in the application section titled"Compliance With Other Laws"prior to submitting the application to the Office. Office of Office of Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines - 11- FILING REQUIREMENTS: In order to apply for a Reclamation Permit for a Regular 112 Operation,please provide: o One(1) signed and notarized completed ORIGINAL and one(1)copy of the completed original Regular 112 Operation Application Form. ORIGINAL SIGNATURES MUST BE DONE IN BLUE INK. o Two (2)copies of Exhibits A-S (required sections described in Rule 6). o Two(2)copies of Addendum 1 -Notice requirements(described in Rule 1.6.2(1)(b)).A sample of this notice is attached for your use. o The Geotechnical Stability Exhibit when required by the Division. o The application fee. The ninety(90)day period for review of the application and exhibits will NOT begin until all required information and fee are submitted. The Office will then review the submitted information for adequacy. NOTICE REQUIREMENTS: 1. You MUST send a notice,on a form approved by the Board,to the local board of county commissioners. A copy of this "Notice of Filing Application" form is attached for your use. 2. If the mining operation is within the boundaries of a conservation district, send a notice to the board of supervisors of the conservation district, PRIOR to filing the application. A copy of this "Notice of Filing Application" form is attached for your use. 3. You MUST include proof of notice #1 and #2 above with the application at the time the application is submitted to the Office for filing(Rule 1.6.2(1)(g)). 4. PRIOR to filing the application,place for public review a copy of the application,less confidential items,with the clerk or recorder of the county or counties in which the affected land is located. 5. You MUST include an affidavit or receipt demonstrating that the application was filed with the county clerk or recorder at the time the application is submitted to the Office for filing. 6. Any changes or additions made to an application submittal MUST be filed with the county clerk or recorder. You MUST also provide the Office with an affidavit or receipt demonstrating that the change was filed with the county clerk or recorder no later than the close of business on the day the change was filed with the Office (Rule 1.8.1(2)). 7. Within ten(10)days after your application is considered filed,you must publish four times in a newspaper of general circulation, in the locality of the proposed mining operation,the notice described in Rule 1.6.2(1)(d). 8. In addition, after the first publication you must mail or personally serve a copy of the notice described in Rule 1.6.2(1)(d)to all owners of record of surface rights to the affected land and all owners of record of lands that are within 200 feet of the boundary of the affected land(Rule 1.6.2(1)(e)). A copy of a form which includes all required information for the notice is attached for your use. -iii- 9. Prior to the Office making a decision(consideration of the application),you MUST submit a copy of the proof of publication from the newspaper and proof of all required notices. Proof of the notices may be by submitting copies of return receipts of a certified mailing or by proof of personal service (Rules 1.4.1(4), 1.4.2(4)(c), 1.6.2(1)(a)(ii), and 1.6.2(1)(g)). The copy of the application and any changes or additons placed at the office of the county clerk or recorder shall NOT be recorded, but shall be retained there for at least sixty (60) days after a decision on the application by the Office and be available for inspection during this period. At the end of this period, the application may be reclaimed by the applicant or destroyed(Rule 1.6.2(2)). APPLICATION REVIEW PROCEDURES: The Office shall approve or deny the application within ninety (90) days of filing unless the date for consideration by the Office is extended pursuant to Rule 1.8. The time for consideration shall not be extended beyond ninety(90)days after the last such change submitted. For complex applications,the review period may be extended an additional sixty(60)days. Please see Rule 1.1(10) for the definition of what constitutes a complex application. APPLICATION APPROVAL/DENIAL: If the requirements of the Act and Mineral Rules have been satisfied,the Office will approve the application. The Act also provides for automatic approval if no action is taken by the Office by the end of the review period. If the Act and Regulation requirements have not been satisfied,the Office will deny the application. If the Office denies the application,you may appeal to the Board for a final determination by submitting a written request for administrative appeal to the Board within 60 days of the decision date (Rule 1.4.7). PERFORMANCE AND FINANCIAL WARRANTIES: A performance warranty,and a financial warranty dollar amount determined during the application review process,must be submitted and approved by the Office PRIOR to permit issuance. A financial warranty should NOT be submitted until a decision on the application has been made. If the applicant is a unit of state or county government,then ONLY a performance warranty is required. Several different types of financial warranties are allowed by the law. Please review Rule 4.0 to determine which type of financial warranty you desire to use. You may obtain the appropriate warranty forms from the Office during the application review period. Please note that an application approval DOES NOT convey a right to begin operations. You MUST submit, and have approval of your performance and financial warranties, and receive your copy of the signed permit document PRIOR to beginning on-site mining activity. AUTOMATIC PERMIT APPROVAL: An automatic approval will occur where the Office fails to notify the applicant/operator that the application has been denied. This decision must be made ninety (90) calendar days from the date the application was determined to have been filed. However,the performance and financial warranties must be submitted and approved by the Office before the permit will be issued even if you receive an automatic approval. NO MINING OPERATIONS SHALL BEGIN UNTIL A PERMIT IS ISSUED (Section 34-32.5-109(1), C.R.S.). -iv- COMPLIANCE WITH OTHER LAWS: Compliance with the Act and Rules and Regulations of the Mined Land Reclamation Board DOES NOT relieve you of your responsibility to comply with all other applicable state and federal laws. We recommend that you contact the following agencies to determine whether you need to comply with their legal requirements: o The Colorado State Historical Preservation Office regarding properties of historical significance including the need for an archeological survey,procedures for requesting a file search, and inventory forms to identify structures. o Colorado Division of Water Resources with regard to water rights; o Colorado Department of Health,Water Quality Control Division,with regard to the discharge of pollutants into the State waters; o Colorado Department of Health,Air Pollution Control Division,with regard to the need for a fugitive dust permit; o U.S. Bureau of Land Management or the U.S. Forest Service if the proposed operation will occur on federal lands; o U. S.Army Corps of Engineers regarding a dredge and fill(404)permit; and o The County Planning Department for the county or counties in which your proposed operation is located. Section 34-32.5-109(3),C.R.S,requires a mining operator to be responsible for assuring that the mining operation and the post-mining land use comply with local land use regulations and any master plan for extraction adopted pursuant to Section 34-1-304, C.R.S. COMPLETION OF MINING: Upon completion of any phase of reclamation,you should consult Rule 3.1 for reclamation standards and 4.16 for details on how to request a reclamation responsibility release from the Board. STATE OF COLORADO DIVISION OF RECLAMATION, MINING AND SAFETY Department of Natural Resources 1313 Sherman St.,Room 215 Denver,Colorado 80203 C O L O RA D O DIVISION OF Phone:(303)866-3567 RECLAMATION FAX:(303)832-8106 MINING —&— SAF ETY CONSTRUCTION MATERIALS REGULAR(112)OPERATION RECLAMATION PERMIT APPLICATION FORM CHECK ONE:Z There is a File Number Already Assigned to this Operation Permit# M2901 107 _ (Please reference the file number currently assigned to this operation) New Application(Rule 1.4.5) i Amendment Application(Rule 1.10) Conversion Application(Rule 1.11) Permit# M 2001 1-07 _ (provide for Amendments and Conversions of existing permits) The application for a Construction Materials Regular 112 Operation Reclamation Permit contains three major parts: (1)the application form;(2)Exhibits A-S,Addendum 1,any sections of Exhibit 6.5 (Geotechnical Stability Exhibit;and(3)the application fee. When you submit your application, be sure to include one (1) complete signed and notarized ORIGINAL and one (1) copy of the completed application form,two(2)copies of Exhibits A-S,Addendum 1,appropriate sections of 6.5(Geotechnical Stability Exhibit,and a check for the application fee described under Section(4)below. Exhibits should NOT be bound or in a 3-ring binder;maps should be folded to 8 1/2"X 11"or 8 1/2"X 14"size. To expedite processing,please provide the information in the format and order described in this form. GENERAL OPERATION INFORMATION Type or print clearly,in the space provided,ALL information requested below. 1. Applicant/operator or company name(name to be used on permit): Northern Colorado Constructors 1.1 Type of organization(corporation,partnership,etc.): Corporation 2. Operation name(pit,mine or site name): NCCI Pit#1 3. Permitted acreage(new or existing site): 57.51 permitted acres 3.1 Change in acreage(+) 66.74 acres 3.2 Total acreage in Permit area 124.25 acres 4. Fees: 4.1 New Application $2,696.00 application fee 4.2 New Quarry Application $3,342.00 quarry application 4.4 Amendment Fee $2,229.00 amendment fee 4.5 Conversion to 112 operation(set by statute) $2,696.00 conversion fee 5. Primary commoditie(s)to be mined: Sand Gravel 5.1 Incidental commoditie(s)to be mined: 1. - lbs/Tons/yr 2._ / lbs/Tons/yr 3. / lbs/Tons/yr 4. / lbs/Tons/yr 5. / lbs/Tons/yr 5.2 Anticipated end use of primary commoditie(s)to be mined: Construction Aggregates 5.3 Anticipated end use of incidental commoditie(s)to be mined: -2- 6. Name of owner of subsurface rights of affected land: See mineral title If 2 or more owners, "refer to Exhibit 0". 7. Name of owner of surface of affected land: Northern Colorado Constructors, Inc. & 4Z Investments LLP 8. Type of mining operation: El Surface Underground 9. Location Information: The center of the area where the majority of mining will occur: COUNTY: Weld PRINCIPAL MERIDIAN(check one): Q 6th(Colorado) El 10th(New Mexico) ® Ute SECTION(write number): s 24 TOWNSHIP(write number and check direction): T 2 North 7South RANGE(write number and check direction): R 67 F East ri West QUARTER SECTION(check one): NE 171, E SW QUARTER/QUARTER SECTION(check one): 111 NE El NW SE I SW GENERAL DESCRIPTION: (the number of miles and direction from the nearest town and the approximate elevation): 1.5 miles northwest of the City of Fort Lupton, elevation 4860 10. Primary Mine Entrance Location(report in either Latitude/Longitude OR UTM): Latitude/Longitude: Example: (N) 39° 44' 12.98" (W) 104° 59' 3.87" Latitude(N): deg min sec . (2 decimal places) Longitude(W): deg min sec (2 decimal places) OR Example: (N) 39.73691° (W) -104.98449° Latitude(N) 40 125201 (5 decimal places) Longitude(W) 104 830010 (5 decimal places) OR Universal Tranverse Mercator(UTM) Example: 201336.3 E NAD27 Zone 13 4398351.2 N UTM Datum(specify NAD27,NAD83 or WGS 84) Nad 83 Zone 13 Easting Northing -3 - 11. Correspondence Information: APPLICANT/OPERATOR (name,address,and phone of name to be used on permit) Contact's Name: Chris Zadel Title: Treasurer Company Name: Northern Colorado Constructors, Inc Street/P.O.Box: 9075 WCR 10 P.O.Box: City: Fort Lupton State: CO Zip Code: 80621 Telephone Number: (303 )- 857-1754 Fax Number: ( )- PERMITTING CONTACT (if different from applicant/operator above) Contact's Name: J.C. York Title: Principal Company Name: J&T Consulting, Inc. Street/P.O.Box: 305 Denver Avenue, Suite D P.O. Box: City: Fort Lupton State: CO Zip Code: Telephone Number: (970 )- 222-9530 Fax Number: ( )- INSPECTION CONTACT Contact's Name: Same as applicant Title: Company Name: Street/P.O.Box: P.O.Box: City: State: Zip Code: Telephone Number: ( )- Fax Number: ( )- CC: STATE OR FEDERAL LANDOWNER(if any) Agency: Street: City: State: Zip Code: Telephone Number: ( )- CC: STATE OR FEDERAL LANDOWNER(if any) Agency: Street: City: State: Zip Code: Telephone Number: ( )- -4- 12. Prima future(Post-mining)land use(check one): II Cropland(CR) E Pastureland(PL) fl General Agriculture(GA) f1 Rangeland(RL) ® Forestry(FR) BWildlife Habitat(WL) El Residential(RS) ❑ Recreation(RC) Industrial/Commercial(IC) 7 Developed Water Resources(WR) 11 Solid Waste Disposal(WD) 13. Primary present land use(check one ❑ Cropland(CR) �� Pastureland(PL) E General Agriculture(GA) 0 Rangeland(RL) E Forestry(FR) E Wildlife Habitat(WL) Residential(RS) V It Recreation(RC) Industrial/Commercial(IC) Developed Water Resources(WR) li 14. Method of Mining: Briefly explain mining method(e.g.truck/shovel): Dry mining with dozers, loaders, scrapers, excavators, and wet mining with excavators. 15. On Site Processing: V Crushing/Screening 13.1 Briefly explain mining method(e.g.truck/shovel): Raw material moved with haul trucks and conveyors to wash/screen/crushing processing plant(s). List any designated chemicals or acid-producing materials to be used or stored within permit area: None 16. Description of Amendment or Conversion: If you are amending or converting an existing operation,provide a brief narrative describing the proposed change(s). Adding area to be mined adjacent to the east side of the existing permit. -5- Maps and Exhibits: Two(2)complete,unbound application packages must be submitted. One complete application package consists of a signed application form and the set of maps and exhibits referenced below as Exhibits A-S,Addendum 1,and the Geotechnical Stability Exhibit. Each exhibit within the application must be presented as a separate section. Begin each exhibit on a new page. Pages should be numbered consecutively for ease of reference. If separate documents are used as appendices,please reference these by name in the exhibit. With each of the two(2)signed application forms,you must submit a corresponding set of the maps and exhibits as described in the following references to Rule 6.4,6.5,and 1.6.2(1)(b): EXHIBIT A Legal Description EXHIBIT B Index Map EXHIBIT C Pre-Mining and Mining Plan Map(s)of Affected Lands EXHIBIT D Mining Plan EXHIBIT E Reclamation Plan EXHIBIT F Reclamation Plan Map EXHIBIT G Water Information EXHIBIT H Wildlife Information EXHIBIT I Soils Information EXHIBIT J Vegetation Information EXHIBIT K Climate Information EXHIBIT L Reclamation Costs EXHIBIT M Other Permits and Licenses EXHIBIT N Source of Legal Right-To-Enter EXHIBIT 0 Owners of Record of Affected Land(Surface Area)and Owners of Substance to be Mined EXHIBIT P Municipalities Within Two Miles EXHIBIT Q Proof of Mailing of Notices to County Commissioners and Conservation District EXHIBIT R Proof of Filing with County Clerk or Recorder EXHIBIT S Permanent Man-Made Structures Rule 1.6.2(1)(b) ADDENDUM 1 -Notice Requirements(sample enclosed) Rule 6.5 Geotechnical Stability Exhibit(any required sections) The instructions for preparing Exhibits A-S,Addendum 1,and Geotechnical Stability Exhibit are specified under Rule 6.4 and 6.5 and Rule 1.6.2(1)(b)of the Rules and Regulations. If you have any questions on preparing the Exhibits or content of the information required, or would like to schedule a pre-application meeting you may contact the Office at 303-866-3567. Responsibilities as a Permittee: Upon application approval and permit issuance,this application becomes a legally binding document. Therefore,there are a number of important requirements which you,as a permittee, should fully understand. These requirements are listed below. Please read and initial each requirement,in the space provided,to acknowledge that you understand your obligations. If you do not understand these obligations then please contact this Office for a full explanation. CS 1. Your obligation to reclaim the site is not limited to the amount of the financial warranty. You assume legal liability for all reasonable expenses which the Board or the Office may incur to reclaim the affected lands associated with your mining operation in the event your permit is revoked and financial warranty is forfeited; -6- 2. The Board may suspend or revoke this permit, or assess a civil penalty, upon a finding that the permittee violated the terms or conditions of this permit,the Act, the Mineral Rules and Regulations, or that information contained in the application or your permit misrepresent important material facts; 3. If your mining and reclamation operations affect areas beyond the boundaries of an approved permit boundary,substantial civil penalties,to you as permittee can result; 4. Any modification to the approved mining and reclamation plan from those described in your approved application requires you to submit a permit modification and obtain approval from the Board or Office; �-� 5. It is your responsibility to notify the Office of any changes in your address or phone number; 6. Upon permit issuance and prior to beginning on-site mining activity,you must post a sign at the entrance of the mine site,which shall be clearly visible from the access road,with the following information(Rule 3.1.12): a. the name of the operator; b. a statement that a reclamation permit for the operation has been issued by the Colorado Mined Land Reclamation Board; and, c. the permit number. t. 7. The boundaries of the permit boundary area must be marked by monuments or other markers that are clearly visible and adequate to delineate such boundaries prior to site disturbance. Lt' 8. It is a provision of this permit that the operations will be conducted in accordance with the terms and conditions listed in your application,as well as with the provisions of the Act and the Construction Material Rules and Regulations in effect at the time the permit is issued. c q7 9. Annually,on the anniversary date of permit issuance,you must submit an annual fee as specified by Statute, and an annual report which includes a map describing the acreage affected and the acreage reclaimed to date(if there are changes from the previous year), any monitoring required by the Reclamation Plan to be submitted annually on the anniversary date of the permit approval. Annual fees are for the previous year a permit is held. For example,a permit with the anniversary date of July 1, 1995,the annual fee is for the period of July 1, 1994 through June 30, 1995. Failure to submit your annual fee and report by the permit anniversary date may result in a civil penalty, revocation of your permit, and forfeiture of your financial warranty. It is your responsibility, as the permittee,to continue to pay your annual fee to the Office until the Board releases you from your total reclamation responsibility. 10. For joint venture/partnership operators:the signing representative is authorized to sign this document and a power of attorney (provided by the partner(s)) authorizing the signature of the representative is attached to this application. -7 - NOTE TO COMMENTORS/OBJECTORS: It is likely there will be additions,changes,and deletions to this document prior to final decision by the Office. Therefore,if you have any comments or concerns you must contact the applicant or the Office prior to the decision date so that you will know what changes may have been made to the application document. The Office is not allowed to consider comments,unless they are written,and received prior to the end of the public comment period. You should contact the applicant for the final date of the public comment period. If you have questions about the Mined Land Reclamation Board and Office's review and decision or appeals process,you may contact the Office at(303) 866-3567. - 8- Certification: As an authorized representative of the applicant, I hereby certify that the operation described has met the minimum requirements of the following terms and conditions: 1. To the best of my knowledge,all significant,valuable and permanent man-made structure(s)in existence at the time this application is filed,and located within 200 feet of the proposed affected area have been identified in this application (Section 34-32.5-115(4)(e),C.R.S.). 2. No mining operation will be located on lands where such operations are prohibited by law (Section 34-32.5-1 l5(4)(f), C.R.S.; 3. As the applicant/operator,I do not have any extraction/exploration operations in the State of Colorado currently in violation of the provisions of the Colorado Land Reclamation Act for the Extraction of Construction Materials (Section 34-32.5-120,C.R.S.) as determined through a Board finding. 4. I understand that statements in the application are being made under penalty of perjury and that false statements made herein are punishable as a Class 1 misdemeanor pursuant to Section 18-8-503, C.R.S. This form has been approved by the Mined Land Reclamation Board pursuant to section 34-32.5-112,C.R.S., of the Colorado Land Reclamation Act for the Extraction of Construction Materials. Any alteration or modification of this form shall result in voiding any permit issued on the altered or modified form and subject the operator to cease and desist orders and civil penalties for operating without a permit pursuant to section 34-32.5-123, C.R.S. Signed and dated this 30 ti. day of 20 z.6 Northern Colorado Constructors, Inc. If Corporation Attest(Seal) Applicant/Operator or Company Name `��11111//�� Signed: ;c. '' q."r "4•••••�.�: Signed: Wiz �: Corporate Secretary or Equivalent : ;o� Title: Tcr�.rX'ci-- �° 198700;�` Town/City/County Clerk C6(ovadO N ) ''''��t/►1 State of ` I , I )ss. W County of -ad ) The foregoin instrument was acknowledged before me this � � day of aKU�V LL by LVl✓`S as —rife cc,S a✓Q r of AT() /-L1 e✓n C r) Qv jd o CO vt,fC,ill rS� { MEL1S• A HA SFORb Notary Public NOTARY PUBLIC State of Colorado Notary ID#2007 /12 My Commission Expiress 10 10/14/ZA27 i My Commission expires: 1 UP-(/�U?7 SIGNATURES MUST BE IN BLUE INK You must post sufficient Notices at the location of the proposed mine site to clearly identify the site as the location of a EXHIBIT A Legal Description A parcel of land situated in the east 1/2 of Section 24, Township 2 North, Range 67 West of the 6th Principal Meridian, in Weld County, Colorado, more particularly described as follows: The TRUE POINT OF BEGINNING being the northeast corner of said Section 24. Thence following the east line of said Section 24, S 00° 05' 59.54" E for a distance of 652.84 feet; Thence, S 89° 49' 11.17" W for a distance of 490.21 feet; Thence, S 26° 37' 11.18" E for a distance of 590.77 feet; Thence, S 28° 26' 19.00" E for a distance of 140.83 feet; Thence, S 89° 45' 11.04" W for a distance of 376.07 feet; Thence, S 00° 42' 58.91" E for a distance of 653.49 feet; Thence, N 89° 40' 51.88" E for a distance of 528.83 feet to a point along the east line of said Section 24. Thence following said east line S 00° 06' 04.29" E for a distance of 60.00 feet; Thence, N 89° 33' 40.29" W for a distance of 42.50 feet; Thence, N 88° 43' 36.00" W for a distance of 181.60 feet; Thence, N 80° 47' 36.00" W for a distance of 86.97 feet; Thence, S 89° 40' 51.88" W for a distance of 1364.89 feet; Thence, S 01° 59' 25.08" E for a distance of 1725.99 feet; Thence, S 09° 47' 04.46" E for a distance of 200.54 feet; Thence, S 04° 36' 19.51" E for a distance of 369.18 feet; Thence, S 06° 38' 11.03" E for a distance of 802.71 feet; Thence, S 08° 31' 20.51" W for a distance of 146.48 feet to a point along the south line of said Section 24; Thence following said south line S 89° 18' 42.47" W for a distance of 182.55 feet; Thence, N 01° 59' 16.82" W for a distance of 2621.12 feet to a point along the south line of the northeast 1/4 of said Section 24. Thence following said south line S 89° 36' 42.15" W for a distance of 858.53 feet to a point on the west line of the northeast 1/4 of said Section 24. Thence following said west line N 00° 07' 35.45" W for a distance of 1311.97 feet to a point on said the west line; Thence following said west line N 00° 07' 04.80" W for a distance of 992.63 feet; Thence N 89° 52' 55.04" E for a distance of 660.08 feet; Thence, N 08° 25' 11.60" W for a distance of 322.41 feet to a point on the north line of said Section 24; Thence following said north line N 89° 52' 55.04" E for a distance of 101.06 feet to a point on said north line; Thence following said north line N 89° 52' 55.04" E for a distance of 1899.31 feet to the TRUE POINT OF BEGINNING. Said parcel contains 5,412,464.83 square-feet or 124.25 acres more or less. The proposed mine entrance coordinates are as follows: Latitude: (N) 40.125201° Longitude: (W) 104.830010° • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application EXHIBIT B Vicinity Map See attached map. • J&T Consulting,Inc. Northern Colorado Constructors, Pit#1 V DRMS 112 Permit Amendment Application 0 .8sa • - n _,„.r4.._....'.. _ Vollmat` !r{x,we .?"\---1..)si' ,''.\,, B:1 . �• + ,.:52 4854 •:.�• i\ 1, _ ../_ t ‘ - R67W R66W" /.0 :,.\.fr.:, l,98,ii?6ll '., '.-. _.(. _\__„ 6eo \ ` 11 laQ,S,$ \ y• B ' 1 • 1 f 2I , 43 19 •. \ --- 1 '. AM -,, \ 48,0__ ,,_ , ..96d. ' l' \ IA \ - A 1 . ._,, . .„,_ ., . i 0 („ J ,, s .. • ii —ar, s, \ , ..4 . :// '. r ., , . ,. 0 s 1 0 i ,. NM, . i 19 c 0 1 ‘,.....- +asa \ • °kW I ' (.• LO • —CO InWe11° CV A ) T 2 N j �.:: ' . .:\ I. __ s!pwl, _ U,m___ C R 18 T 4�e, o ° 111 II . o, 00 a o oo I �° o , /1' ,,,, , ... .______ N ° N 1irl J 1• / r. mmillit () ' i • .._,."..." II• _ illbkhikoh-,,ik Ir./ I BM ;.,? • ok , ilm 1 \ ° - u I. g •)iC. E . . ' ----I:41 ' m ! o ° ir \2. 0 3,A. s� 1UiL):. / i� i FORT LUPTON Q. 1 1 F Q '','n •t \ • l /s.---)\ U •./„ \ 'M.! IIui 1 E N a 2000 1000 0 2000 co cc ��-- Exhibit B �, SCALE IN FEET a a - Date: 1/22/26 CD u ' J&T Consulting, Inc. Northern Colorado Constructors Job No: 23017 U o NCCI Pit #1 Drawn: WSS 305 Denver Avenue-Suite D o Fort Luton,CO 80621 p Vicinity Map Scale: 1" = 2000' co 303-857-6222 Sheet: 1 Of: 1 a EXHIBIT C Pre-Mining/Mining Plan Map See attached maps. 11 • J&T Consulting,Inc. Northern Colorado Constructors, Pit#1 DRMS 112 Permit Amendment Application • • .� \ 30' NON-EXCLUSIVE • \H ACCESS UTILITY & C; '\ E \ /F I G \�_ [SLURRY WALL EASEMENT / r - - - I• �\ \\\ \ (REC. NO. 2766900) / i 1 - - - - =' .\\ ICI JI A - . . / \ \ _ 4• 1 r I� �> ��--- .�\ \ 1 — N_ — — — — — x — -x- - - _ _ •� z. _ ■ • _ • .. - \ - - • _ .. ■ - - - . . • Y G • • • • • . • • \ - _ - ■ ■ ■ � . N • . 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Scale As Shown c� 100 50 0 100 200 300 Sheet: Of: z ii M SCALE IN FEET 2 6 N L I'lllll'1 Il�il�iil II MATC H L I N E I11►1►11►I►11►1111I11j \\ ` . IIIIIIIIIIIIIIII► ►1I I 111111111111111"11111111 PROPERTY OWNERS WITHIN 200 FEET: •• IIIIIII 1 II \ I1111111I11II1► III Weld County - \ 1 IIIIII11111I►I►IIIIIII \\ 11111111111111111111111111I I \ MAP ID NAME/ADDRESS ASSESSORS ID NO. _ 11111111 ► ► \ A COYLE LAURA& NEIL A 130918001009 • NI 111►1►IIIIIII11II11LEGEND: •� n co i I (IIII IIIIII111 iIIII111I \\ 9046 COUNTY ROAD 25 1..i U) o E ► 11II FORT LUPTON, CO 80621-9308 00 N I I — 5280 EXISTING CONTOURS : D 0 . I 111101011111 1 I IIII B CAMPION CHASE WINSTON COOLEY & 130919203001 5280 PROPOSED CONTOURSN U o`"o111" 111►114 `\ SHAUGHNESSY VICTORIA RUBIO Q p l`I ` \ \ — — PROPERTY LINE Q Q M ' I I• Jr ►\\`\\�\\` 8924 COUNTY ROAD 25 \ \ \ FORT LUPTON, CO 80621-9306 X X EXISTING FENCE �/ > I 0 • I` \\ I 1 `\\\\\A J • • 1 \ j I 1 `\\\\ \ \ C BARRON-MELENDEZ REAL ESTATE VENTURES LLC 130919203002 W EXISTING WATER LINE �■■� p Ip \ I \\ \ `\\\\\�\`�` 14751E COUNTY LINE RD IRR EXISTING IRRIGATION LINE o `. \ �\ \ ��\`\\\�\\\\\ LONGMONT, CO80504-8031 OE EXISTINGL CT IC \I I� �\ /^\�`\\\`�\� E E R • � \\ \ \ \ \\\`\ E EXISTING UNDERGROUND ELECTRIC• _ 1 \ . i \\\ c `\``\\\\\\\\\\\\` D L G EVERIST INCORPORATED 130919203003 • jut \\ 1\ Il 1 11\11111\III 350 S MAIN AVE STE 400 130919203004 G EXISTING GAS LINE Wi\\\ 1111111I111111 i IIIIIIII SIOUX FALLS, SD 57104-6551 131124001003 ) . • 11IIII 131125101002 EXISTING ROADS •• • i II 11111601111II11 EXISTING WATER COURSE 1 III►III 111III�II I11I E KERR ROBERT W 131113000004 EXISTING RIGHT—OF—WAY / l 1 I \ II IIIII►I11 I I► I1 11104 COUNTY ROAD 20 131124001001 — I II FORT LUPTON, CO 80621-9302EXISTING SECTION LINE I � \ I IIII11111IIIIIIII►L — . . - 1 I I I I�_ _�� / ' 1 w I 0 ►1 L = �� , F MURATA PERRY 131113000005 100 YEAR FLOODPLAIN I1 I" - - 7215� 100 YR FLOODWAY_ S HIMALAYA MALAYA WAYci I _ - _ -�\� �� CENTENNIAL, CO 80016-1730 11 L _ __�\��\� \ 1��1 PERMIT BOUNDARY r CD 1 I ��: \�� — — SLURRY WALL I I // ��\`� \� G KOENIG JESS (HEIRS OF) 131113000006 c / N \\�� 703 MCKINLEY AVE MINING LIMIT — I `\\\�\ FORT LUPTON, CO 80621-2137 '_ \;� � -$-MW1 MONITORING WELLS 0 a) • w \\�\` H CHAVEZ HENRY (HEIRS OF ) & CHAVEZ DANIEL 131113000007 • N I `\\ 11494 COUNTY ROAD 20 CO • \ \\\ FORT LUPTON, CO 80621-9302 Z U • D15 I I \ //``1\ I GROUNDWATER MANAGEMENT SUBDISTRICT OF 131113000009 / i Q \,-' I it THE CENTRAL COLO WATER CONSERVANCY DIST X 3209 W 28TH ST W •/ I ) GREELEY, CO 80634-7554 I / // • w I 0/4 J CENTRAL COLORADO WATER CONSERVANCY DISTR 131113000010 / 1 //j4/ GROUND WATER MGMT SUBDISTRICT . X ///j//j/� 3209 W 28TH ST / ////�// GREELEY, CO 80634-7554 f ► /////////r I / //j0 // K 4 Z INVESTMENTS LLP 131124003001 0 • /j�j j / / j 9075 COUNTY ROAD 10 • I I s, I // �j�jjzz�/�%j, FORT LUPTON, CO 80621-8447 ////////jj /////V L I j �� jj�� L CURBY KENNETH E & BJERKE STACY A 131124003002 0 �+ I I / /� ��% // / 8721 COUNTY ROAD 25 H // /%/%//%%�%�/// / FORT LUPTON, CO 80621-9305 0 i • I ///jam/�/� / l / // / /// I I I II f IIII111�1(�'I (/ ( I / M FLOS MARY ANN UHL 131124003003 la I ) I IIIII IIIIIIIIII111(r I I 8607 COUNTY ROAD 25 C 3 II ) IIII IIIIIII\III\IIIIII\IIIIII II 1 I / FORT LUPTON, CO 80621-9305 i 1 I I \\�IIII\\ IIIII\II\II\\\I I \ I / �1+ w • I I II IIIIIIIIIIIII IIII \ I I N NORTHERN COLORADO CONSTRUCTORS INC 131124102003 H I I IIII III IIIIIIII I 1 \ 9075 COUNTY ROAD 10 131124102004 a. ` • I 11 III IIIIIIIIIIIIIIIIIIIIIIIII 1 1 I I FORT LUPTON, CO 80621 8447 131124102006 0 0 I \1 I\II\\ III II II IIII III \ \ 1 I 131124102007 Z v ;! 11 IIq\\ I \IIII\III\IIIIIIIII \ \ \ 131124102009 • : I\ II\IIII\III\III I \ \ \ 131124402008 \ I w 0 \\ \ \\ I ; I• III\ \\ II 0 SAL NASRENEO & SALINASLAURIEL 131124300018 • \ I < 8320 COUNTY ROAD 23 I \ I 1 1 I N I FORT LUPTON, CO 80621-8922 I� III III \I IIII\III III \ ", I r—IIII III\I\III�IIIII�IIIIIIII \\ \� 14 I P FORT LUPTON CITY OF 131124402006 * I 1 IIIIIIII IIII II III\III \ I \ 130 S MCKINLEY AVE • } \ t 1\1I"\\II11\11\\1\1111111111\\\III\\ IIIIIIII III\ \ tn IIFORT LUPTON, CO 80621-13431III III \IIII \ Iw II I III IIII �� \ Q\ II II \ Q THORNTON CITY OF 131124402007 U) aw1IIII II11111I 11 II Z a \ II L 1IIII\I \I 1 \ \ 9500 CIVIC CENTER DRO II IIIIIII I\I\ ` ` THORNTON, CO 80229-4326 - _ 1 III \I\I I\I III\III �- \ \op I I IIIIIIIIIIIIIIIIIII\III l \ R AURORA CITY OF 131125100051 W�❑ I :i I 11 \II II\I \II\IIII\\\ \ 15151 E ALAMEDA PKWY STE 3600 131125401003CC M I IIIIIII\I\IIII\IIIL AURORA, CO 80012-1555II\I I\IIIIIILLL - U- \ 1 IIII\III�I� _ i- N 1.. _ \ \III I�\I i� = m N co \ ; _ \ VI 1 C J I •\ , o .= f U • ........ �1i�_ Z iii E IL _ _ _ . _ — __—_ -- W :'' J&T CO NSULTING 7 -77 .. - - _ _ 5 • COUNTY ROAD 18 . i nn J 85' ROAD RIGHT-OF-W r" l.�- _ — — — �N� P — — ii m / • D R r• R a Job# 23017 n Date 01.23.26 T m NOTE: VEGETATION: Drawn By °' Designed By TPY NORTHERN COLORADO CONSTRUCTORS, INC. AND 4 Z ALL AREAS WITHIN THE PERMIT BOUNDARY ARE CURRENTLY Checked By JCY o AGRICULTURAL CROP AND PASTURE LAND, GRAVEL ROADS, OR File JT-Pre-Mining Plan.dwg INVESTMENTS, LLP ARE THE SURFACE OWNERS WITHIN o BUILDINGS. Scale As Shown THE PERMIT AREA. c- 100 50 0 100 200 300 Sheet: Of: U Z SCALE IN FEET 3 6 N a • •)( \ . \ 25 OFFSET � I \\ FROM /\ I ( \ �e.1 \ / PERMIT - \'�'} Mi /,r / �•�� r - IDARY ____ ___7---\ -K 0: :•A4:1:: iV 1 \ \ �'��A1� � --�� /1/// II MW4 N 0/ I �� \ -- - %/ �� L '" --� --� 7 \- `� �� - - �;/� I � IIIEAT: 40.1316 N a't �\ - - �i /,�// \ ,(`� / /j IIIJ ) �o �� (f i/// l I LONG: -104.8270 W III 1\1 l / ��? 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II ., 38' FROM DITCH \.�\�\ / III ` /� / / / ( �'\ 1 1,\ \\ II \ 11 11J\\ \' Il \\ \ 25' OFFSET III �l �� / / 1(�_�___ -. / \��'1�1' \ / IIII \ 1 \ 1 p 3 ` Il \\ \ —I ..) \ FROM / 1 W /: 41(//f1/(4i • i11lll111 IIII \ I 20' WIDE .ACCESS ROAID IIII\I 111 \ I GEE 27 .-12HZ \ ��► 10' OFFSET \� \•. \ PERMIT /\\ / 111 II _\ \ I11I 1 3 GEE 3�'N-25HZXX ,�; I \ \\ \ BOUNDARY / IFO5 � /� -ml- GEE U N IT B #1 \ \\ \1 I \ III IVh JJ I ' II\ II \ IIII\III. I 1 GEE #1/�C-525HZ r/ \ RM GEE G LOT 9 r>>�� / I-I \II 1 III / �I IRRIGATIOtJ DITCH I I 1 ` I GE # C-12HZ \ PA 11/5/1998 \ \\ \\ �;,� DIVISION NO. 3Q�/ \ \ 5N-25HZ / \ \ \I I SCALE & ' q I / REPAT & 10m/ J \ RE98�l I � ♦ / � SCALEHOUSE \I\ I \ I � ( \ / -. / - - �• ♦ I / c, / , 103 OFFSET FROM /( GEE �L6C_1 HZ�/ \\ak.' 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E UIPMENT 11 ,� - - _ / �/ / \ \\\V ' , 'fir111 \� / Q \ 1 i I — i C-0�ICRETE / / l II \ \\\' \h = V� III N PARKING & STAGING �11 1` DITCI�- - _ / / / / J\l \ ` \ *+ / e--------11 1I r 1 i. _ 11l // J \ \\\ \111 I /I \ _ \ AREA FOR EMPLOYEES I i \SEPARATORS I / - - ;1- - — - - — SLURRY / / /�\ I \ , ` 1 \��\ CR 25 • IIII \4 // , -_; - I \ & EQUIPMENT �' \ (8) - —_ G=i —G= — _ WALL /\ / I \ i \ 0 :— �- / / (/ l fix/ \\\ \\`' (�\ CNTERLINE //� ( , �� \ � - - l\ \ I \ LIAM E GE =�_�_�G\�`� •�4:N_________ �/F- / f / j ,) l�A • \ �. \\ ZI — B RNERS r / ) /i \\// // \ — _ - - L 1 ( UNIT #1 -�� \ ,� � �� \ •,.\ \ /` �� \ \ / _ _ (2) \ ■ TANK BATTERY 1 1 14 201 �� -- -' �/ / /// // / / // 1 �� SEPARATOR I / / ��_..-i. _ -__ l �l �� / Z %// \ \\�` \ � ) 1 -- /%/� \ K 1 I \I\ a, MINING LIMIT /// \ \ \ .. I\ URFACE USE 1 I �� / �/, \ PRODUCT W' R 1 I 'I II -.: . 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I , CZ co a II II\ ��, I Q . 1 r - _ jl I11 III �� 25 a La / DEWATERING PIPE III �` / I I , I /' � LOT 8 0 ` TO DISCHARGE TO III 1 NI- z 1 / LITTLE DRY CREEK 11 II I br i DIVISION NO. 3 Il 1 d'� (REC. NO. 1879198) 0 \\ NIII I / REPEAT OF LOTS 8, 9, & 10 J&T CONSULTING W 1 \ N I ° , 1, I / v ` OF THE LUPTON MEADOWS LAND CO. I N JI11 , ��, ter. • - I IIIII; I I `� a I / A IIIIII \ \ yrill__ e. N c `\ IRRIGATION DITCH /1 1 1� Ii I 1 �o m \ MATCHLINE /II 1 ,III I I ti ii \ \\ / III IlI I 1 I ; I EARTHEN \ 7 \ / i III I III Oil c� I I I DITCH 2 Job# 23017 n Date 01.23.26 C LEGEND: Drawn By TPY Designed By TPY SEE SHEET 6. PERMIT AREA = 124.25 AC Checked By JCY 0 MINING AREA NORTHWEST = 10.81 AC — File JT-Mining Plan.dwg 2 Scale As Shown MINING AREA NORTHEAST = 6.48 AC 100 50 0 100 200 300 Sheet: Of: MINING AREA SOUTH = 15.79 AC Z M SCALE IN FEET s 4 d CP IRRIGATION DITCH /1 ► I i r ' I ' ► \ MATCHLINE li Ill I INI I II \ \ y I II►I I 11 • EARTHEN C; \ ` z I I I'I► � I I I ' ► DITCH \ UNITED POWER ELECTRIC I DIRECTION OF 4as� 4841 / I a� in-=(>- a a —\: / �'�\ oE� lip I11 I I I / ` TRENCH I iIII \ MINE ENTRANCE N` ` � l MINING SO� -TH PIT \EWAJERING , / a� +� N o\ — \ — I I11 I 1 1 ,n-� i Ir 20' WIDE ACCESS ROAD _ l••i a� 00 N 8\ � O o / II� III' I _ v �o '� O c., 1 I / III, II � � � �5 - --- � �' S� I � 0 vKPK WELL i� \\ / \►Ij I I �i ` �� / - o� Z Q O Qs o� i I MW2 DOa� Q- `'I yl �� ` MONITORING WELL — _ _ 25' LAT: 40.1263 N HOusE Q- > -I 0_ _ CONCRETEI\ I ��± --o.-— __ 4862— o= — — —per �.��— —moo - � '� = LONG: —104.8289 W — — 0 0 I \ _ MW1 — \ LAT: 40.1264 N \� - - - - - - _ - - -______ IIEW _�_ - - — = ii. — _ ��H �fNfH � 04 O iJ_ \\ x— I LONG: —104.8328 W ,�1 � _ c,.� I` 1J6 0 �!� FF�F47 •� � l Hf�fH fH i H J Hi Mamma gm fH mifHi H,If/ _ _ - - c— - - —c— —c x 111►► IIII o :—; _ _ W f1HiN { \ `� 'I OUTBUILDING I,° \1\ FENCE LIN KERR—McGEE 25' OFFS IC 0 —x x X_ Il 71\, r__ �� I OE—\\ — _ _ E— /— ��- I III — — — - \ KERRR McGEE ` I KERR McGEE WELL a _ _ — _ — _ — _ _ I E_ _ -_- -_-_ _s- _ �� OE _ III I ter_ - \I \ GAS LINE ,�'' // 1/ ===_ - • I I / _ _- - . _. - _ - _ - �.�\\ \\\\ HOUSE II' I IIIII��r, _ —_ ,��IIII I I KPK WELL III IIIIr—__—_=_=,,�11 Tv I • ► / �� • •- - - 1 - : II I I 1 1 I - _ 1 I / I I iI ram= �I I 1 I / -h . . _ _ . . . . _ . . _ . . _ . . 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EDR K 1111A� - - - - - - - DEWATERING DITCH I11111II\I11111IIIII \_ \` 1 o 12 IIIIII11Ij11lIIIlIILL _ TYPICAL SECTION Y 2 \ III 11111111E — N.T.S. U .• L II/ IIII IIII` _ m N. \ I O N M • - J N (o aLuc 1 \ • 0 w O '....t TO 8 ) - = J&T CONSULTING 7-r 1: ••6 , - -1T--- COUNTY ROAD 18 • - - Vx.."----; Loc — ----iF111711424 — / Job# 23017 iii Date 01.23.26 `1" Drawn By TPY O1 Designed By TPY 11t) o Checked By JCY r File JT-Mining Plan.dwg a� o Scale As Shown a 100 50 0 100 200 300 Sheet: Of: U 6 SCALE IN FEET 6 NM ■ a EXHIBIT D Mining Plan Mining Limits Northern Colorado Constructors, Inc. (NCC) proposes to mine in the amended land located in the parcel of land situated in the east 1/2 of Section 24, Township 2 North, Range 67 West of the 6th Principal Meridian, in Weld County, Colorado. The proposed mining site is located within the City of Fort Lupton. CR 25 is east of the property and an access road from the property connects to CR 25 approximately 3,200 feet north of the intersection of CR 25 and CR 18. A portion of the property is adjacent to CR 18 to the south. The South Platte River is approximately 2,000 feet to the northeast of the property. The dominant land use surrounding the property is agricultural use (west and east), water storage reservoir use (north and south), and sand/gravel mining properties (north and south). The permit boundary will encompass approximately 124.25 acres which will all be affected acreage, and approximately 33.08 acres being mined. The remaining area will consist of access roads, and disturbed/undisturbed land. The following table depicts the different affected acreage: Affected Acreage Mining Plan Area (acres) Mined Area 33.08 Access Roads 9.11 Disturbed Land Adjacent to Mining Slopes 68.86 Undisturbed Land 13.20 TOTAL 124.25 Various setbacks from adjacent roads, adjacent structures, and oil and gas infrastructure will be maintained as mining occurs. All setbacks specified in the surface use agreements with the oil/gas companies will be followed. The final executed agreements are expected to be obtained in the near future and will be forwarded to the Division when they are available. A minimum 200- foot setback from any existing oil/gas facility will be maintained until that time. See Exhibit C, Mining Plan Map, and the Slope Stability Report for the mining limit configuration and information on setbacks and their locations. The abandoned wells would be cutoff after mining has reached the bedrock surface or the reclaimed slope surface where a new cap and any additional concrete for the existing plug would be needed. Occidental Petroleum (Oxy) is the leaseholder and operator of the existing abandoned wells. We have also worked with Peterson Energy Operating, Inc. to provide this service at other mining permit locations for other operators. If Oxy does not want to perform this work, then Peterson Energy Operating, Inc. would be contacted to do it. They are licensed and bonded to obtain approvals from the Colorado Energy and Carbon Management Commission (ECMC) to do these types of re-plug services on abandoned oil and gas wells. Northern Colorado Constructors, Inc. ' la'Consulting,Inc. NCCI Pit#1 DRMS 112 Permit Amendment Application Products Sand and gravel will be the primary product produced from the amended NCCI Pit #1 amendment area. The principal intended use for the sand and gravel is for road base and construction aggregates. Subsurface drilling and testing have verified that the NCCI Pit #1 amendment area property contains a significant commercial deposit of sand and gravel. The depth of interbedded sandy clays at the surface range from 2 to 4 feet. The thickness of the aggregate material ranges from 9 to 21 feet where bedrock or clay contact occurs. Mining Methods The deposit will be dry mined after a slurry wall is constructed around the perimeter of the mining area for the Northwest and South Cells. Mining will not expose groundwater prior to the slurry wall being constructed for these two cells. Design specifications for the slurry wall and quality control procedures used during construction will ensure that the reclaimed reservoir meets State Engineer's Office (SEO) performance standards. Dewatering trenches will be excavated around the perimeter of the mining area prior to mining operations commencing. The depth of the ditches will vary as the mining progresses deeper into the alluvium in order to maintain the groundwater level below the bottom of the active mining surface, and therefore minimize the exposed groundwater surface area. The dewatering ditches will flow to a collection pond, from which the water will be pumped and discharged where it will reach the South Platte River. The Northeast Cell will be wet mined and will not have a slurry wall around the perimeter. The Northeast Cell will be backfilled with excess overburden materials. The equipment and facilities may include, but are not limited to the following: Scaling Equipment A scale house and scale will be used to weigh trucks and product leaving the pit. The dimensions of the scale house are 40' x 12' and the scale will be 70' by 10'. The scale house will be founded on typical trailer type jacks and tiedowns on top of concrete pads with minimal rebar to provide reinforcement. The scale will also be founded on concrete pads with reinforcement where load cells are located for the scale. These foundations would be removed once the pit is fully mined. Processing Equipment Screens, wash plant, crusher, conveyors, stackers, and other miscellaneous processing equipment. All processing equipment will be mobile and temporary without fixed foundations. Washing will occur at the wash plant and excess water from the washing will be recycled to the wash water ponds within the processing area, there will be a sedimentation pond that will receive the excess water first and then and overflow from the sedimentation pond to the clear water pond for re-using the water and pumping back to the wash plant. Earth Moving Equipment Dozers, loaders, scrapers, excavators, and compactors will be used for mining and earth moving operations. Haul Roads and Access Roads Haul roads will be graded and constructed using the existing pit run where needed outside the processing area in order to move material from the mine using haul trucks, loaders, or scrapers. These roads will be mined and removed as the mining is completed. • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application Access roads to the processing plant will be constructed with aggregates made at the site where the entrance to the permit boundary is located to the scale house and through the scaling area until the access reaches the stockpile locations. The roads around the stockpiles will be constructed from the existing pit run similar to the haul roads. Miscellaneous Equipment Dewatering pumps, electrical trailer, generator trailer, small portable generators and watering trucks will be used as needed. As mining progresses, topsoil and overburden will be stripped to expose the aggregate product below. Topsoil will be stripped and salvaged from areas where overburden material will be stockpiled. All soil and overburden material will be used on-site for reclamation; so long-term stockpiling of these materials is not anticipated. Overburden stockpiles will be located within the proposed mining area. See the attached mining plan in Exhibit C for the stockpile locations. Mining of the aggregate will progress down to the underlying bedrock. Since reclamation will occur concurrently with mining, it is not anticipated that overburden material will be stockpiled long-term prior to use in production of road base. During mining, the mining the face will have a 3H:1V slope to bedrock or the bottom of the future reclaimed reservoirs for the Northwest and South Cells. The Northeast Cell will by wet mined and backfilled with excess overburden materials. The processed aggregate material will be temporarily stockpiled near the portable processing plant. Recommendations for monitoring of slope stability, including, conducting a visual inspection of the excavated slopes on a weekly basis for the duration of mining, conducting a visual inspection after a major precipitation event that has saturated the ground using the same procedures, contacting qualified personnel to evaluate and recommend remediation work to stabilize the area in the event a visual inspection detects signs of potential slope failure, and if no visible signs of slope failure are detected during mining, reducing visual inspections to once every six months after mining completion, or after every major precipitation event. All local, State, and Federal rules and regulations will be followed for the storage and handling of any fuel for the facilities. Topsoil Handling Plan As stated previously the topsoil will be stripped to expose the aggregate product underlying the topsoil. The topsoil will be stripped using scrapers and stockpiled in the topsoil stockpile as depicted in Exhibit C. Topsoil will be stripped and salvaged from areas where overburden material will be stockpiled. The volume of topsoil is approximately 53,369 cubic yards. The depth of the topsoil is approximately twelve inches over the majority of the mining area. The topsoil will be stripped and stockpiled prior to mining operations. The volume of the overburden and clay material is approximately 863,440 cubic yards. This will be stockpiled as it is uncovered during the mining process. The height of the stockpile will be approximately 23 feet. Mine Phasing NCC anticipates mining and reclaiming 33.08 acres of the 124.25 permit boundary for the NCCI Pit #1 amendment area progressing as shown on the Mining Plan Map, there are 13.2 acres that will remain undisturbed within the permit boundary. The overall time required to complete the mining and reclamation for phase 1 is estimated to be 2 years 3 months and 8 months for • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application phase 2 based on an average rate of 300,000 tons per year. The initial production is expected to be 200,000 tons per year with the maximum production expected to be 300,000 tons per year. However, it is possible that due to demand fluctuations, mining could progress slower than anticipated and additional time may be required for mining and reclamation of the site. The mining will progress beginning at the outer edge where material will be moved toward the interior such that the mining slope can be established for the Northwest and South Cells. The mining slope will be established for the entire perimeter in 3 to 6 feet intervals. The Northeast Cell will be wet mined at a 3H:1V and backfilled with excess overburden materials. Dewatering Dewatering trenches will be placed along the perimeter of each mining area for the Northwest and South Cells. The dewatering trench around the perimeter of the phase being mined will be placed at the toe of the mining slope. As the phase is mined deeper the dewatering trench will be lowered and moved laterally along the mining slope toward the center of that phase. Slurry walls are anticipated to be installed around the perimeter of prior to exposing groundwater and mining will continue to commence in those phases and it is expected minimal dewatering will be required after the slurry walls are installed due to the slurry walls cutting off groundwater infiltration into the pit for the Northwest and South Cells. No dewatering will occur for the Northeast cell as it will be wet mined. Prior to exposing groundwater in any of the cells, NCC will have an approved substitute water supply plan and well permit. The substitute supply plan will be updated annually to account for water that is consumed due to exposing groundwater by the mining operation. Explosives Explosives will not be used during mining. • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application EXHIBIT E Reclamation Plan Lined water storage reservoirs will be the final reclaimed use for the NCCI Pit #1 amendment area and there will also be areas that are disturbed or backfilled that will be re-seeded and revegetated. Portions of mining area will be reclaimed as "native" areas, which will be re-seeded with native vegetation. The majority of the mining area will be reclaimed as water storage reservoirs. The remaining area within the proposed permit boundary will consist of reservoir shoreline, unimproved access roads around the reservoirs, and reclaimed vegetated land. Final Land Use Reclamation Plan Area (acres) Reservoir Water Surface 24.37 Access Roads 3.41 Reclaimed Vegetated Land (Disturbed Land 83.27 and Slopes above Reservoir Water Surface) Undisturbed Land 13.20 TOTAL 124.25 Water Storage Reservoirs In general, the mining limits will be mined down to the claystone/sandstone bedrock. The relatively impermeable bedrock will make the bottom of the reservoirs. The reservoirs will be separated from the surrounding alluvial aquifer by the slurry wall liner system as detailed in the cross-section shown on the Reclamation Plan Map. The slurry wall liner will be keyed into the bedrock material and extend upward through the height of the alluvium to three feet above the reclaimed normal water surface elevation. Design specifications and quality control procedures used during the construction of the slurry wall liner and clay liner will ensure that the reservoir meets the State Engineer's Office (SEO) performance standards for permeability. All reservoir slopes will be reclaimed to at least 3H:1V final grade. Since reclamation will be concurrent with mining, most soil, overburden, and bedrock material excavated during mining will be used almost immediately. Scrapers and dozers and compactors will be used to shape the reclaimed slope material along the reservoir perimeters to achieve the final grade. There will be backfilled areas for haul/access roads and the Northeast Cell areas that are not within the future water storage/reservoir footprint. Final reclamation by capping with topsoil and re-vegetating above the expected reservoir water level will follow grading operations as well as backfilled areas that will not be haul/access roads to minimize the amount of disturbance at any one time. Recommendations for monitoring of slope stability, including, conducting a visual inspection of the excavated slopes on a weekly basis for the duration of mining, conducting a visual inspection after a major precipitation event that has saturated the ground using the same procedures, contacting qualified personnel to evaluate and recommend remediation work to stabilize the area in the event a visual inspection detects signs of potential slope failure, and if no visible signs of slope failure are detected during mining, reducing visual inspections to once every six months after mining completion, or after every major precipitation event. Northern Colorado Constructors, Inc. ' la'Consulting,Inc. NCCI Pit#1 DRMS 112 Permit Amendment Application During reclamation activities, inlet and outlet facilities for the reservoir will be designed and installed once the operational criteria of the proposed reservoir have been identified by an end user. Reclamation Measures/Materials Handling Backfilling will be done to reclaim the Northeast Cell and other disturbed areas that are not within the reclaimed reservoir foot print. The backfill material will consist overburden, clay, and topsoil from on-site materials. There will not be known toxic or hazardous materials in the backfill material. Additionally, it is not likely that acid forming or toxic materials will be encountered during mining. The mining will not leave high walls on the property. In addition, there will be no auger holes, excavations, or shafts left on the property. The auger holes for the gravel investigation were backfilled with native gravel and soil cuttings from the drilling. The auger holes that were not backfilled were the four monitor wells that were constructed and permitted as permanent monitoring wells to monitor groundwater at the north, east, west, and south sides of the amended permit boundary. Monitor wells will remain on the property so the end user may continue to monitor levels of the groundwater elevations. Topsoil will be placed to finalize the grading such that seeding can occur. The topsoil will be placed at all disturbed areas and on the mining slope to an elevation matching the expected reservoir water level. Topsoilinq The top two to four feet of material is overburden and approximately the top twelve inches of soil on the property is classified as topsoil. This layer includes the root zone of grasses and crops, which will be stripped and stockpiled separately. Topsoil will be re-handled as little as possible and a Technical Revision will be submitted prior to re-locating topsoil stockpiles if it is decided to use different locations. By using concurrent reclamation techniques, the topsoil is not expected to remain in stockpiles for more than one to five years. If the stockpile remains more than one growing season, it will be seeded with a fast-growing vegetative cover to prevent erosion. All topsoil will be retained on-site to reclaim the reservoir shoreline, and other areas disturbed by mining activities. Where required, topsoil will be replaced to a depth of twelve inches. Prior to placing topsoil uneven areas and low spots will be graded to subgrade elevation, in addition debris, roots, branches, stones, in excess of 2 inch in size will be removed. Scarify surface to depth of 8 inches where topsoil is to be placed for a roughened condition to assist in eliminating erosion. Scarify/cultivate in areas where equipment used for hauling and spreading topsoil has compacted subsoil. Place topsoil during dry weather and on dry unfrozen subgrade. Remove vegetable matter and foreign non-organic material from topsoil while spreading. Grade topsoil to eliminate rough, low or soft areas. Revegetation As mining operations are completed, areas for reclamation will be graded and shaped for revegetation. Runoff or excess water from adjacent areas will not be allowed to flow over slopes being graded and seeded. If needed, berms or channels will be constructed to divert excess water and convey it in a safe and non-erosive manner. For disturbed areas, the reclamation plan includes re-vegetating with appropriate seed mixes to minimize erosion and re-establish natural terrain. A proper seedbed is firm and free of competing vegetation. Correct firmness is when an adult footprint is only slightly visible on the prepared bed prior to the seeding operation. The seedbed can be firmed, if needed, by pulling a commercial or homemade packer or roller. A firm seedbed is essential for proper seeding depth • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application prior to using the mechanical seeder or broadcasting seed. Apply seed evenly in two intersecting directions. Rake in lightly. Apply seed at the vendor's recommended bulk seed rate/acre according to the quantity of PLS contained in their bulk seed to achieve the specified PLS/acre rate utilizing a mechanical seeder. Where access is limited and seed is applied by hand broadcasting, apply the seed mix at twice the PLS rate per acre and rake in once broadcasting in completed. Do not seed areas in excess of that which can be mulched on same day. Do not sow immediately following rain, when ground is too dry, or when winds are over 10 mph. Immediately following seeding, apply mulch to thickness of 1/4 inch. The seed mixture below was selected as recommended by Weld County for "Areas South of County Road 68". Reservoir side slopes below the anticipated reservoir water level will not be seeded. The proposed seed mix is shown in the following table. Reclamation and Temporary Stockpile Seed Mix Seed Species Scientific Name Application Rate* Mix (pls/acre) Western Wheatgrass Arriba, Barton, Rosana 2.50 Blue Grama Hachital, Lovington 1.50 Vaughn, Butte, Niner, El Sideoats Grama Reno, Haskell 2.25 Grasses Sand dropseed 0.25 Calibra or Garibaldi Perennial Ryegrass tetraploid 0.75 Slender Wheatgrass Pryor, Revenue or San Luis 2.50 Alkaligrass Fults II, Salt on Sea 1.25 Switchgrass Bebraska 28, Blackwell 1.00 *Application rate is for drilling the seed. If seed is to be broadcast, the application rate will be doubled. The seed mix for final reclamation as described above does not require fertilizer per the information provided by the DRMS. The seeded areas will be covered with dead crop litter from sorghum or milo crop forage, or with straw mulch at a rate of 2,000 pounds per acre. Ideal seeding dates for Colorado are November 1 to May 1, when the soil is not frozen. Grasses should be seeded when soil moisture and temperature are optimum for germination. Grasses are designated either "cool" or "warm" season based on their growth cycle. Cool-season grasses can be planted when temperatures are cooler and day lengths are short. Warm-season grasses need warmer temperatures and longer day lengths to grow. Refer to Weld County's seeding recommendations as a resource for time frames outside of the ideal seeding times at www.weld.gov/Government/Departments/Public-Works/Weed-Management/Controlling- Weeds/Reseeding. If a significant invasion of noxious weeds occurs after seeding, the weeds will be mowed before they can go to seed. The areas will be mowed periodically for additional control as needed. Mechanical control will be used as a first priority. Chemical methods will only be used if no other alternative produces acceptable results. See Exhibit J for specifics of the weed control plan. • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application For temporary earthen stockpiles, the reclamation plan includes re-vegetating with appropriate seed mixes to minimize erosion and establish more rapidly to stabilize the stockpiles. If a temporary earthen stockpile remains more than one growing season, it will be seeded with the seed mix above to prevent erosion. Water— General Requirement To minimize the effect on the prevailing hydrologic balance, NCC will: a. Comply with all applicable Colorado water laws. b. Comply with all applicable Federal and State water quality laws and regulations. c. Comply with all Federal and State requirements for dredge and fill. d. Re-grade and backfill all sediment and siltation structures after mining is completed. e. Monitor groundwater levels adjacent to the site and mitigate any damage to adjacent wells that dewatering activities may have. (See Exhibit G) Groundwater— Specific Requirements The operation will not affect groundwater quality on or off the site. The operation will comply with State groundwater quality standards. The mining and reclamation may affect the groundwater table surrounding the mine site. A ground water model by McGrane Water Engineering, LLC has also been provided and the results indicate that water levels will be affected by an increase of one foot in an area near the northwest side and a decline in water levels of approximately one foot on the northeast side. Mitigation efforts to minimize these impacts are not recommended at this time and the existing NCCI groundwater drain along the west side of the original Pit #1 is sufficient. Northern Colorado Constructors, Inc. proposes to monitor groundwater levels monitoring wells that they have installed, or have access to before, during, and after the mining and reclamation is complete so that impacts to the groundwater table, from this mining operation, can be identified and addressed. It is the intent of Northern Colorado Constructors, Inc. to operate responsibly and to mitigate any damage to wells that is directly attributable to the mining and reclamation of this site. Reclamation —Approximate Time Table The initial proposed rate of production for the mine is 200,000 tons per year and the maximum proposed rate of production for the mine is 300,000 tons per year. The total time frame to mine all phases assuming an average production rate of 300,000 tons per year is approximately 2 years 11 months. The following table shows the approximate time frame to finish each phase of mining assuming an average production rate of 300,000 tons per year: Phase Acreage Time Frame to Complete and Reclaim 1 74.48 acres 2 years and 3 months 2 8.79 acres 8 months The assumed annual production rate is 200,000 tons initially to 300,000 tons maximum for processed material leaving the mine each year. The size and area of reclamation varies but generally consists of the outside mining slope being reclaimed at a 3H:1V slope as mining occurs for the Northwest and South Cells and backfilling of the Northeast Cell with the addition of excess overburden to backfill, then topsoil, and revegetation for the surface where • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application disturbance occurs and the slopes above the normal water surface elevation for the reclaimed reservoirs. For more information on sequencing and size of the reclamation activities refer to Exhibit L financial warranty calculations. • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application EXHIBIT F Reclamation Plan Map See attached maps. 11 • J&T Consulting,Inc. Northern Colorado Constructors, Pit#1 DRMS 112 Permit Amendment Application X \ 30' NON-EXCLUSIVE C.; \ ACCESS UTILITY & • I\ •/ I r-,____,......,-----„,„_.... \ \\` - SLURRY WALL EASEMENT / r - - - - _ I J \ \ (REC. N0. 2766900) / i l _ - - - - - -=' °ICI JI ` r � _ — �'� /,' / I� < �� ,� .�\ f - - 6T�RE627X- _ -X X=- -�- - - - \� \ \ -� J Nam _ \ -� - �� A - �. �7.-��) _ - - 0 co E \ Imo co o • \-ej—( G \ \-- —G— — — \ ' \ �� .) i - ---/ //// >. I MW4 ICI . °o N ° �� I `�\ t - �� - - ///� �N / I / r III EAT: 40.1316 N p c�14 \1 - - 11,---- ..- -- _ �� \ �� / , //�j /�\ III I LONG: -104.8270 W VI c U rn�J 60 PIPELINE to ENT / f ///// I >1 ` 11I \I\ / q 0 _ r �� o --� \ \ \ ^ — — _ �� c\� .- /�/ '� l� j')// III : Q r� �l l l (�I1111 J 1 ��Q`� I� J v8ss "o-��k =-= - - r �\ ��\� (REC. N0. 3670129�\ / /// �, `� i��/i I �'I�I�' ( �� © Q-M / ( \\ 11 1 1 rill / �hh \ ♦ �� \ �� / 1J�1/ f o / , /i/ 1(I(' p� cJ0MW5 � i�L I\ / \ �� • �� =zZ \ 11I,/l/ z / �/� 'III < I �■■� o o L � EAT: 40.1310 N - _ / �/ / ` x� \ \ \�\\\. �� \ II IIII / r// / IIIII 0= 04 o 0LONG: -104.8325 W _ - -�/ —;' '2 \ ;� N \\ - \h\��1� � � - �� / (IIIII �c� r) �\7. .. \ \ I(h�1 1� —�855 /%XjG /// ti J ��• ` \\\�� \ ` /, \��:„NLNEANAN....j."/) L ~ —�� \\ full Za 1 i >-E �� I I\\�111 ' /-' ` \ 483 \ \ � \� c �/ III o ,2 / - � �- � . f 3 � III ��I11 � / �` III O \ II -, G_ — �83 N- �\ RECLAIME D RESERVOIR liwN , L :�, , _ , _ — I \ NORTH EAST CELL \ pull r -^�- // - 4, BACKFILCO 2 FEET ABOVE GROUNDWATER -LEVEL IIIIS < I \ <\ \\ \\ IIIa! / / i\ ``' 3,5 \ \` \ \ I I co J \ IIIII 2 1 i'i< \ /— ,� I — III./ I • *555/ I/ \ \/ • I \"�—� .J iH \ . � � �' :\ I 'Icz / _ 11 \ RECL , D RESERVOIR \ \ \ \ � .�\ \ IIM I , r ci \� �\ � I v // \ - ' 11 1� NORTH ;�� \ �,`\\ — `� oil I \ \ c - �� ` /� 0 PIPELINE EASEIv�E`N�11 1 - o - —\ I `• �� %� -\� � l // / (REC. NO. 4154912`ll\ 1 �1 I \ \�� ` \ \ ?'\,\` I - - ��\ N� �\ I�I +� /� , // / 1\ I I ' . �8 \ \ \\ ► III O. \ / „/ ? / ( \\� ��/ \ \ / II 1 „ _ \ y \\ \ \ /• // /�/ I I ( (d '41\\I,//\ / `\ \��'\ III\�I '1 I I I` _ _ -� — \ ` 2-Nv \ i w \\\ /� 1 \ 111 c� /� L` l 11 \\ \ \ \I I 1 \ / _ o• 1 �, \ \\ / \ I IMI V /,/ � IINN.:_-_-- � // 1 I III v - - - \ \ k 1/ \ pM/ 0 I \)` (_J �,\� 1 \\ \\ 11 11 $. \ I I ` \\ '�• \ (> ` ��\ 11 i I \\ I I V •1 ___/-- _ _ �/• / //� —�� \ / \��\ �\ \1 \ \ I \/ \III `II \ \ I \ \ �/ 1 — \ , � ` \ \ \ l\v11 IIII \ \I\ \ \ \ 1 4838 _, ,, _. / II \ • /� , ,„ „/ , J _ ,,,_ \ ,\� \I - .,I` I 'I C\ // �� l N < ,_, \ \ \ / %/ // //////j%' ``(rr\ \ \ \l\ I' \ 1 A \1,, 1 \ II // )( \� I / \\ �\ \? IL x �j ` wf� / / i,// • �'\ \ 1 \\ III \ 111 111 I\ IlN \ \ ;�\ \ / _ ` ��1 / I \ I ��l 1,I., \ I �`° ` II ' 4858— — / / II — --\` ` I ` III �, ✓� �_� — 4III\I \ l 1 \ \ \` — 1,�\ \� �I • �.\/ \\ / \ I1IGEE 27 -12HZ \• III11 IIIII I 1I II � \ �. �_ i \�^ \ • ) // 1 ( () \\ �� I ` I \ �\ 11111 II 1 GEE %�C-525HZX / / #1 ❑ \ LOT 9I / r 1 1 \ I t- �11 \ \ GEE UNIT B ` J� \ �1I 11 1 t� /— I \ \ II111 V # _ / \ \ \ \ �., 1.\ �� /i1I]7 c< \ )I 1 /\\II / I\ 11 \ \ I �1I I I I fire GE lir 125HZ r / \ • PA 11/5/1998 / / `\ J ` I 1\ ` 11 i _ / / J \j / ;��\ \ DIVISION NO. 3 0 ■ //0\/ // / 1 �/ �_i i l 1 f I I / I 1 1 ( \ �' \ \ (REC. N0. 1879198) v / �� Lit II \ \ hall I / _ �' _ \ / l �/ I \ I It. \� 1 \.� , /� ( /Ii0-61) .H_,Z \ \�'\ \\ REPEAT OF LOTS 8 9 & 10 — \ II 1 \ ( \ �/ // ELEV R SURFACE / / GEE i - \ \\ �1ii (!F \\\ ( /ice II 1 I\ \ I (\1 I C —I/ GEE f6N= 527 �,\ \\ \ OF THE LUPTON MEADOWS LAND CO. i \✓ jj / f II` 1 I \ I V / t�859 / I/ GEE / 1 sC-25HZ 't^\\ '�\ I \ , L30 ROW O ■+ / .` / I\\\ \ \ .� r �� / 30 ROWi If H /// ii 0 1. ,1 --... _....__... 1 «‘ . \ I 0 1), \ i _......,..-.T 4. .;;;:z__ 7 / , -. \\‘,... \ ) / ( 1 _____ / _7, 1 1 .., \ ,, ,\v . „ _, \\ \\ I • IIII 1iti A\\ / , , — \ v v I I\ — — , , �,\ , , ,�, _ II / 48s� �\\\ A w/ C�III \\\ — _ \ \ \ 1 . rl� __ i /I / f �\ \\ \I \ 1.= / I �\ _� 120' WIDE ACCESS ROADliti / /1 1 III S------,-/----; ��'I 1 I ,� \� �� :—. i _ — _ _ — ^ j l / l / \ \\•' 1 I �■' • III \ / i \\ 1 1 1 11' I / Jn —4860"� - 30 PIPELINE / / / /0 l r\ \\ \ \pi- = H I , II 11 // /� \ I\ I _. _ - - EASENIE?dT-/� / / / ///� 1 )\ \ ` \\o A _ .. • IN � _ - , \ , �- ' G - 1 \ , o t _ \ 1 \ (LIAM EGEE G\�`� � / / \ l \ /// j \ � �/ i \ \ •�;\\\r-- \ • • -, , \ UNIT #1 • \\ ` lII TANK BATTERY 1 UNIT #101 \ =�� / / /�� / / // \ _ _ — \ l I IV SEPARATOR - L �° �� •�� _/ EXISTING OIL GAS \ r// o \ \\ ';�ib\ I //�� // \ \\ 1 I I I URFACE USE III \ `�` `sue \ ` CCESS ROAD %//// i/ \ \` \\ ';` i/ /I q I �// \ ,\_ \ \ I II'\ •III •EC. NO. 3955813) III ��. �86 ® �/ \ \ \ \ 1 / — — II` / / \�/ \ l \ N ° fir- —_ — sN \ 1 i \ J \N \ II I WATER SURFACE fir��..,..,____ ti c �� \ .�`_ -�/' Eo 1� —HWELL \ •; \�` l/ I l N. III �� — Q \ \ // I \ \ t'kt II I I ELEV. = 4855 0 ��\\ \� - _ I \ \ \ \ > r 1 • \�/ / / \/� I \ II I t' ♦� /.../ \ \ ,.- SHED / (\ \\ I 'IIIIIIICI\ �1I \ \ _ — ti — I \ \ / ) I .) :// \-_ _/ ``�v l / \ \\ �\ \ HE o / \ \\ \ 11 IIII 1I = \ ( \ \ •� Q / / \ \\ I I' I „III L , \ . 58s9 I I \ ��\ \ ~ 7 ,//- // / \ \I�11 I III I / � 1 y \ \1 I1 > ) \ ` \��- _..-. -..‘ / CL cr) / \ \ IIII II 11 / �/ �/ 1 \ \\\ \/ \ // \\ ` in cvi / \ \ I �E ./ / / \ \\ . - - - - - - \ \ a HOUSE 5 I ` w co - - - - Z — - - \ 7- - IIII I I I 3�') - \ �� I \ � ,, I f / A I �� -- II � 1— ( \ \_ _I a i \ I 11 III UNITED POWER / \\ — YEASEMENT \ U — - — - A I I ( I (REC. NO. 4143932)/ \\s_cs0 I II \\ V11\i .,,11C CP I / II 111 1 `i C' a) Li I N ix / � _ _ �/ III IIII'' �� o / III 111�' 14860 — / x� IIIIIs � � � � � ✓ � � '/ LOT8 0 w / II 111 I I / / \ f DIVISION NO. 3 l z 3 \ II 11 ) \ d'ux ( (REC. NO. 1879198) \ N P,P / REPEAT OF LOTS 8, 9, & 10 J&T CONSULTING a \ \\ I r I / �2 \ OF THE LUPTON MEADOWS LAND CO. N III , I , II� I I r.E . .: I \\ /^`- - -1 II IIIu a) I \�! �� IIII I I yr-1---, RECLAIMED RESERVOIR C'c \ /y I Ip I I I CC Lo \ / Ili' 1, I �� ' 1 �\ \ MATCHLINE yell N1 II I SOUTH CELL a \ \\ / III jIIM I II I \ 1 T G `. \_ 7/ / . ul I1 hi i' 1 a Job# 23017 a) uThc Date 01.23.26 LEGEND: Itl Drawn By TWT Designed By TPY 2 SEE SHEET 3. Checked By JCY 0 r cu File JT-Reclamation Plan.dwg o Scale As Shown a a) 100 50 0 100 200 300 Sheet: Of: U Z0 - - 1 M SCALE IN FEET 6 N I a \\ �I Ih I1 �o -- \ MATCHLINE 7 I11}I1` I I 1 I I J y II INI I I . \ `\ �; III 114y l 11 } RECLAIMED RESERVOIR , 1 \ \ , II I I III1�1 I 1 0 7 , I 1 I IIV I I I SOUTH CELL , - WATER SURFAC I M■■I 1 i III1� I ELEV. - 4855 I I > i , II ' \ co �',1 oE� 1W11-Iliq' III I I A8 \ -. 1 IV �/ \ / Do .0 "' i , \\ \ I III I = _ % _ i••i CD N - ' o /� III IT 1 k n —� I 20 WIDE ACCESS ROAD CC o 0 n 0 co .-. \ I / I III 11 \ .z r i oc' I E VI c0r- U® 1 // I I III" I Irv,-'�'„ -- - -- / I I ,��'" ZQ Q o 0 1� \�tC I I I I MW2 0 D 2 u, Q- `''. yl ��. !1� �_ o - _ '- - - - - - I/ 1 LAT: 40.1263 N HOUSE 0 > j I\\ _ MW1 - '� C -= = - - - -moo- -.moo = - -.��- -� — tea. _ LONG: -104.8289 W - (�� CD - LAT: 40.1264 N ' \� -�� `' LL — x— I LONG: -104.8328 W - G — — G — ____ - - _ _�� -E�--__ �_ _ __ _ \\ I'1 = -,� o I 1 III - - — . •+ — � -� - -_- -_- - - _ i-G -� — —G— G IIIIL. 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I - - NORMA ER SURFACE ELEVATION _ 4852 FT Oj - � I � `* \ 4, .,\ 4\\ ., 4, 11, ., 4, ',lc _ -. 4, 4, ., 4, ., I NORMAL VTAf _ RFACE AREA = 9.68 AC •� 4, � 4, W 4, 4, 4, 4, W 4, 4, W W W4'�'•-•Slate_ CO \ �• / / � � / \ \� II1A� • � / / y I ��G � � 11 �\ w \ \� \ II'1 \ I / � � \ WATER STORAGE VI Net: , = 124.5 - w \ / 4, W 4, W W W 4, 4, W y �III/_ .��` -�\ o' � I \ / \ III CZ\ \4,, � Cde� \\� 4 * \ 4'I I1 G' � / .y \ i� / I ,. � -\ \ II I ` � - v - �� h�� jC � w �/' • t•N INv1 // // w Vj-.V� �� /71( r J ( �\ I * .4, * W .v * I W W .k W * 4, � 483U / ( Y v \ \y \NcI " IIICCCD I \ \ V v . 1I IIII\ I 1 I � � �I 4J�\.� � ' \ \ \ � � 1 �I _ „ `�/ / - \ � \ \ \ 1 \ / -/ :�j� 7 \ \ �-� vI ' NI. 44 • %�Y •Y V \ W \ \ •Y •Y •Y •V Y V Y Y •VIY `Y `Y1 Ill1 (NJ/ / � _ � \1 \ 1\ , / ,0// *i s _ \k\ I * _� 4. I 4. / �14,� 4. „Note' * . 7 }, .I / j \ 11111 , / / / � � - � \ ' \ ;11 k \ j�� / /* / .�U/ 4, �� \ \ III � rI w / \ \ \ \\? \ / x` /\ /W l / (W 4, 4, ,,,,.......4' V\�1 \ NY`/ 4, I� 4, 4 4' % 'V 'V 'V I 1 II % \ I 'V Y 4, 4, 4, f0 0 'V 'V �iI f IN, ' c \ Li]` // 4, N, , / 1 r ll /��\\d d - , */ II ,, \ ` � �`� A'1 ` \ • II 4--) ,- - \l \ \ I ,..,/�� ` �< \ - -- ww, w III I \I \w I.v w w w w \w 4, Ll .v I\I,, I � I4, w 4, w w ( GEE 27/4 12H, wP.�� 301 /4�� w .vwwwwwww \s. \ \ . ) U / III v I V V V V V \ .V II I IW � W b _ �' \ ic>4 ' \( ✓ 111 A -\ 11 IIv4,1, GEE #1/C-525F4Z � /= GEE yNIT #1 LOT 9/ � I / J I / ; \ `\� I I I, 1� II I tv GE # C-12HZ /, r T vwvf/' * • *PA 11/ /1998 * . \\ \ DIVISION N0. 3, W v v \\ \ O ■• w- w / - 1 I 1 w /I � �\ w 4, w 4, 4, 4, \w w w \ I , I- 4' 4, 4, .v rGE41N 2Hz v •�/ 1/ w`\ /� vI I /v I v v w w w \ v w w w WATER SURFACE ii/1)1' ww // Ii` wvw, ww t"n' \\ , \ (REC. NO. 1879198) No U \ v/ 1 /� v \ / � 1 , v v v I y <\ .�( 1C / /I Ages. / \ \ \\ EAT OF LOTS 8 9 & 10 u =/ \ , v i/Js v \v - v/ v v vk v I / v I v v v v v r\ v v I \�, I / ELEV. = 4852 GEE �6C- H i` 1 J \\� ( W W / II \ I �;)I •JW WW \ o - v v 2 \\.' \\ I\ OF THE LUPTON MEADOWS LAND CO. i/- / I .\ I V � (k., i 4, v\ GGEEEE ffb6C- 5HZ • 1�1, \\J \ 30ROW .v4\✓v j V V V v / v I \ I k/ v ;� O al=_R: 30 ROW/ W .,. /,�� .I � _ s V lV I * I 4 4, 4, ,rt .V \ \, \, / I � t , .4, I 0 2 �,. ,_��/ l / V // ::\*\ \ v \ \\ JI OiW f W .� * *\ / * * • w w w , - % _ sk �•Y V •Y • •Y �Y NI/ V •V V •Y �Y •V 1 •V •V .V .V �Y �Y .V � P 1 W y `- • ` _ === / - � NI/ �Y Y 4, Y •Y • .Y \ • / l ' \ \1 sv •1 • • �� ti�,�..t�. `�`�• � --. rii � 0\ /�� \ V Y .V .v Y is •V .v \\ .v .v y 1vV .v .v W v .v •v I .V , v .v � r . � � �i� , = •vWy •YI / ` ./ •v .V .v W •v .V 4U6 \ \ v i v V/I. v .V V v v1 v v v ' - 1 1 V V V V V v V -•b ` v� \ V - V v O•�P� �-.P.� �L� � � � � _ ��\\ s \ I I � / �. y__ •/ 20,, VIDE,AcCzSS .R4AQ , o.C- ` - 4,� V V V � V Y/ V v V .v ^ vf / / \'• 4' •r. - �,III \ v / l � * * 4V . \* � * 4 1 \ ` * b�, 4J ' ' .. * * .ka �: *30' INEk // / .� / .� / \ '' \'v / Y V V V • V V V� v V V Y VI Y Y Y .V V I \_ = Y \ _I , I I + I 4�` a.I1G1 ' 4' ' ' ' ' ' r '\ "-� r ' V ' ' ' 'V ' IV I I , , - . . = � , - . W / /CI ' / ,\ \ \-�� s• F ,�;_ - - -- ---G _ _ - - � � \ I OO • 'I1 .V .V •Y 4, /4,, NI, 4, /9 �- .V 4, \ 4, 'V lV \ 4, 4, •Y •Y •, 4, I 'V ? I I =-`��L `►`- r ■ Y �Y 4 '/ / 11 * ' ' .V Y W � /Y 4 \ , \�w ii, 1 / 4/,20 •�• • �_�_---� ��_ i- t ��w`--� /LA E vEE , -, V V V �� \_ '-44, � /-' A, \ `V V `V- `, `V VNI, � • ` \ \\♦`'' \L .,�/ .V .V w r .V ' � -iw .K 4, w \ 4, 4, N- 4, �\ ir- I ) / 4, y ,\ y y y /*/ y y V \V V V V_ V -a -� L V V Y 1V V1 1 N � #1 V � � - f - - � i- Y YVl �• - �� ` �\ � V / Y \Y� V Z • ��_• --•v 4, w w w w 4, V w w \ •v 4, v •1 v •V w y TANK BATTERY -- w w/ . - 4' •V4' 4, w4, •, 1 • / / \ \ \ I I I 44 SEPARATOR -SURFACE USE ► � �• � � . •Y1/ V 4',...." .V/�/ .V .v •v W .V VI' W W \ W v •v •v .V v\\\ .v .v II I EC. N0. 3955813) III ` !� \\ '� • :. '� * E STI G 0 LS , \ \\ft � �' 6C CSS sOAD v // Wv I �Ja' / \ ` '.' \\\, / �/ \�Y III* V / 7 ./// V V V v v v \ Y vW \ v Y v v V \ V Vv WII III\ I W WI , !+ -.,1 \ �• ` Y •v •Y- - D /� - - SN \ / / Iv v / v .V v v V v .v v V v v v v v V V \ v v\ .v •V w//•V- w 4, •V * 4, 4, * 4, 4, `,\ 4, 4, 4, 4, 4, 4, v\ �\ Yill tt\ II/ Ci\ II 4 I V ' e WATER SURFACE ELEV. = 4855' L! \` 1� ` \.• . � Z w /.'\\ �\ O 7 �� ` \ - - v \ � \ ` \� \ - SHEDA ►\ / /V / 1 \ \ V I � �. . \ ��1 �/J J \ I \ I skr 4. 4, w /w * / 4, 4, 4, w 4, \ I �I \I II ' II �_ I / � HE o • I \ \\ \ ,V , � \ \II II I , - _ / ' \`* � w w w w w w . v 5l I V Vtea 11 \ \ � CD 0-2 I. \ 111 I I� III I/ 1 V�� I� \\ 1 I I Ar 1` \ 1 = = -4,4 --. � / ' O_,✓ V w _ _ /47 • \ 104 \ , 4. i 1 7 II• A, w w w 4, 4, * \ II I � _ a l\ I I .I I \ . HO-US E NI" :: - \ ) >VN - � ' - _I/ wC9 NI' NI' NI, / '. V \ . 4. 1 I/ 1 T \ 1N W W W W W /.V W W W W .V .4, W\ W W W 'V W W W V11 .LAI I f* 4, W .V W W ,l/ Zv - 1 � ;I /- - - JI I , \ \ / w 4, w 4, 4, 4,7 ., 4, 4, 4, 4, w 4, 'V w w w w 4, w .V 4, I t UNITED PQ,WER4, 4, 0�� j � I I � \\ \ UV V V v Y Y Y v v v v V V V \ V V V Y Y Y Y Y ' v I I EAVME T .v V Y / \ �> I `I �i I_4' 4' '_ _.V IV 141 (EEC. N0. 41443932)/ 4 IIII 44\ I /` CP O � CO > >, o •V 4, •V 4, •V 'V .V .V W 4, •V 4, •V •, •V .V 4, 4, 'V .V •V `V 11 II I •V 4, .V W Z , 'V I W - g \ .. 4, 4, NI/ 4, sl, 4, 1, * 4, 4, 4, 4, 4, 4, 4, 4,/ 4, 4, 4, * 4, 4, 4, 4, I . . 1 l I i ,4, •Y V NI, •Y •Y l4, * • 4 •V W 41, •V W •Y •, V •, 4, •, 4, I , .b . • w 13 WI 1/ / . . I 4, II, Q W • • Y • • w J. ► l A y V 4860 - ' Y-L, 1r „ / Fi ¢ _a ' ' 'V 'V `4,' 'V/ V 'V • 4, 'V •V •, 'V 4' NI, NI, •, 4, ' • •V W� I •Y w / ® I > I LOT 8^W ' ' NI, 4, 4, 4, / N4, 4, NI, 4, 4, 4, 'V 9NI, NI, NI/ 4, 4' 4, 44' 1II 1h,I I' , I I l DIVISION NO. 3 z v NI, NI, 4, 'V 4 \4' 'V 'V 'V 4, 4, 4, 'V 'V 'V ''\ 4, 4, 'V 'V 4, 'V � �1I j ' ` 3.0:1 < / I4, I (REC. N0. 1879198)/h ` \ �cp cii \ 4, w • \ . ' w ' ' * \ .* 4 ;� r V - REPLAT OF LOTS 8 9 & 10 J&T 11 CONSULTING) f t / ` 1 � w II OF THE LUPTON MEADOWS LAND CO.a ' / i :� � � � � � � � � � � 4, 4' 4 4 � t i 1tI% RECLAIMED RESERVOIR ` ,� ... � � � � � � � � � � � ,� � � � i , C- * 1 \,4, 4, 4, 14 11, I I SOUTH CELLiiI yr-11-- . �\ 4, 4' 4, 4, 4, 4, 4, 4, * iIIII I II W : Y * I• I DiA II I Ia TOP ELEVATION _ 4858 FT ? 0_ --( ) ' ' ' ' ' ' \' ' ' ' ' ATCHLINE '' ' '' 4' '' 4, '/11MINI IW1 WATER SURFACE ELEVATION = 4855 FT .' I I \w w w w w w w \ 4' 4' w w w `, W `V V 'V Z Y V 'V 4' / I II\ ' \� ' y• � I 4,I c 'E \ I IIIIIIaI 1 11 I I I I 7Ii i It NORMAL WATER SURFACE AREA = 14.69 AC ; WATER STORAGE VOLUME = 202.83 AC-FT ��wI II a Job# 23017 0 LEGEND: iNI Date 01.23.26 RECLAIMED AREA TABULATION: Drawn By TWT �, SEE SHEET 6. Designed By WY .I WATER SURFACE = 24.37 AC 0 GRAVEL ACCESS ROAD = 3.41 ACII) Checked By JCY File JT-Reclamation Plan.dwg DISTURBED AREAS (SCARIFY, TOPSOIL, SEED) = 83.27 AC Scale As Shown UNDISTURBED AREAS = 13.20 AC 100 50 0 100 200 300 heet: of: A TOTAL AREA = 124.25 AC U Z s SCALE IN FEET 6 4 N_ d • : 4. 4, 4, 4. 4, A*1 1Ih1 , ; O I 11+^I /-J W W W 4 * 4 \W * W W W �IVIATCHLIN E W W W W %� I I ' W I%� I I t� I I ' s. ., s. 4. \ W W W W W W W W W W W W W W W, I illii1 I1 W of I RECLAIMED RESERVOIR I w I ; I v \ .. .� \� 11111 I II' ►�� 0I SOUTH CELL I I��w , IV I ! TOP ELEVATION = 4858 FT WATER SURFAC I � ti I M■■� ". \ / 4. 4. 4. \.� 4. 4, V 4. IWIII1 * • ELEV. = 4855' I '��w I W I n 1 4, 4, �\ 4/ 4/ 4, 4, 4, 4, 4, 4,7 j/ 4, 4, 1,;9, -1 I 1; NORMAL NORMAL WATER SURFACE 4841 :< A I N< a� o / W W W W W W W \ W W W W W W ' W * r W W 4 W W�W 1 j l W NORMAL WATER SURFACE AREA = 14.694 w I W/ I a) \ I�I1 I III I 'I / 1 , \ / p� ■■+ � N 4, W W W W W W W W W W \W W W W %-d \4, 4' 4' 4' 4,OE� WI , IIII \ �' II WATER STORAGE VOLUME = 202.83 AC-FT �i Q o i o W W w .V W W W W W v, w W W W H/ W 4, W W W/W W W 4, _ J W p .Y sY �Y �Y .V W �Y W �Y .Y �Y W �Y yv �Y �Y �Y .V .V '- - -AIL / �Y s \.� / �� .III' �� .�_:.,. ,�• �,,/. A=� w I �' 20 WIDE ACCESS ROADil O C° cI • l _ . zQ - - Q p Cr) Y 4, 4, NI, 4, 4, 4, 4, 4, 4, .y y .y y .4.4, .Y1 y /.y y y y I v, 1L 1 I �w .�•��. %NZ#1"G�C�Y�� -�`.��,� �t'�T�.�Y� rt`�� '� t`.�1•� - � - � - �./T�� - - ✓� ..�r�� tic� -�� .� � I I o OU 4, 4, 4, 4/ 4, 4, v, 4/ 4' 4/ 4/ 4, 4. 4, 4, 4, 4, L ' "W NI, 4, 4/ \ 1l1 • 1nilm . ^ ;a " .fiZ,4, I I-vf , � W . � ' 1' � � ' � . i i milil ir_ ''1 .I MW2 \ _ -u- �-_-=s -== / LAT: 40.1263 N I* * 4/ 4/ 4, NY NI, I il,olia o � 0 C _ l _ �) ► . ., LONG: -104.8289 W� 0 HOUSE LY p_ US �- -1 >a) -y\ .1, y .4, W W 4, 4/ W v, 4, 4, 4, _' ' y W 4' NI/ NI, 4/ MW 1 `' -..�_ , • - -- - = - - -.mow• =s.-y. k. _ w\, wwwwww w w w w w w * w w w � w w LAT: 40.12E4 � \ - _ 1w 4, w w w y w w NI, v �c-x-x-- c sill, •LON : -1,04.8028*W 4, ' . .v\ .v 4, 4/ 4, NI/ .v 4, 11 O • W v .v . . 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The proposed amended mining area is located within Weld County adjacent to the City of Fort Lupton City limits. CR 25 is east of the property and an access road from the property connects to CR 25 approximately 3,200 feet north of the intersection of CR 25 and CR 18. A portion of the property is adjacent to CR 18 to the south. The South Platte River is approximately 2,000 feet to the northeast of the property. The dominant land use surrounding the property is agricultural use (west and east), water storage reservoir use (north and south), and sand/gravel mining properties (north and south). The operation will consist of sand and gravel production and will impact the South Platte River in the form of depletions due to evaporation and operational losses associated with mining. Mining of the NCCI Pit #1 amendment area will last for approximately 2 years and 1 months. Once reclamation is complete, the water storage reservoirs will be created with a total surface area being 24.37 acres. The depth to groundwater ranges from 3 to 7 feet within the amendment area (measured in MW-1, MW-2, MW-4, and MW-5, See the attached piezometer measurements table). The site will be mined down to a depth of 37 feet at the deepest depth thus exposing groundwater to the atmosphere. This exposed groundwater, along with the operational losses associated with the extraction of sand and gravel deposits, will impact the South Platte alluvial aquifer. These impacts will cause river depletions that must be augmented. Groundwater will be exposed during the mining once the mining depths reach an elevation of approximately 4854.3 feet. To enable dry mining at the NCCI Pit #1 amendment area mining site, there will be dewatering trenches around the perimeter of Phase 1. These dewatering trenches will change in length throughout mining. The maximum length will occur when Phase 1 is completely mined. The maximum size of dewatering trench will be 5,430 feet long and 5 feet wide, or 0.62 acres of exposed surface area. water will be pumped into dewatering ditch, which traverses the site, and ultimately into the South Platte River. As mining progresses, the dewatering trenches will shift to account for additional groundwater being exposed. The gravel pit will have a slurry wall liner constructed prior to the commencing of mining of the Northwest Cell and South Cell. The Northeast Cell will be wet mined and backfilled with excess overburden materials. Water Requirements Water use at the NCCI Pit #1 amendment area will include evaporation from exposed groundwater, dust control of haul roads and stockpiles, water for the wash plant (i.e. wash screen for concrete rock and sand) and water retained in material removed from the site. • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application Evaporative Loss Evaporative losses are dependent on the exposed water surface area, which may shift throughout the mining operation, but will not exceed the maximum. Exposed surface area at the NCCI Pit #1 amendment area mining site will include groundwater exposed in the dewatering trenches. The maximum exposed surface area at the site during mining is estimated at 24.37 acres. NCCI plans to keep the Northwest and South Cells dewatered throughout the life of the mine, and the Northeast Cell will be wet mined and backfilled with excess overburden soils. Evaporation data was taken from NOAA Technical Report NWS 33, Evaporation Atlas for the 48 Contiguous United States. The annual gross evaporation was determined to be 45 inches for this location. Monthly evaporation percentages are established by guidelines set by the State Engineer's Office. To determine precipitation, data from the National Weather Service for Greeley, CO (UNC) (1967 through 2025) was used. The long-term average precipitation at the NCCI Pit #1 amendment area mining site is estimated at 13.78 inches. Effective precipitation is calculated as 70% of the total precipitation. The net evaporation is the difference between gross annual evaporation and effective precipitation. The resulting net evaporation is 35.35 inches or 2.95 feet. The maximum annual evaporative loss from the 24.37 acres is 71.89 ac-ft. Operational Loss The average annual production from the NCCI Pit #1 amendment area is estimated at 300,000 tons. Using 4% moisture content, (2% for moisture in the product and 2% for water used to wash), the total associated consumptive use for water retained in the material mined and water used for washing is 23.7 ac-ft. Dust control use is 10,000 gal/day, 6 days/week, 4 weeks/month for 10 months of the year. This equates to 7.4 ac-ft. Maximum annual operational loss is estimated to be 31.1 ac-ft. Consumptive Use The maximum annual consumptive use (operational loss + evaporation loss) at this site during the mining operation is estimated to be 102.02 ac-ft. Replacement Water The replacement of consumptive uses at the site will be accounted for in a substitute water supply plan (SWSP) approved by the State Engineer. The SWSP will be obtained prior to any mining activities occurring that expose groundwater. Surrounding Water Rights The attached Figure 1 Well Permits in the NCCI North Pit — Groundwater Evaluation by McGrane Engineering, LLC shows the permitted wells within 600 feet of the mining limits and permitted wells within the boundaries of the groundwater model/evaluation. The well information and locations were obtained from the Division of Water Resources online mapping well permit • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application locator. This well and water rights information was cross checked with the State's CDSS. Between the sources, all permitted and decreed wells are included. Table G-1 below is a corresponding list of wells as numbered that are within 600 or more feet of the mining limits that were within the mounding area on the north and east side of the pit. Table G-1 - Permitted and Decreed Wells Within 600 Feet or Area of 0-1 foot mounding not owned by Northern Colorado Constructors, Inc. Map Permit Structure Zip ID No ID Well Name Owner Address City State Code Monarch Mountain Monitoring Minerals& 1 317694 Gee MW-1 Well Aggregate PO Box 680 Frederick CO 80530 4Z Investments, Fort 2 0448671 Domestic Well LLP. 9075 CR 10 Lupton CO 80621 Monarch Mountain Monitoring Minerals& 3 317696 Well Aggregate PO Box 680 Frederick CO 80530 Groundwater Management Subdistrict of the Central Colorado General Water Purpose Conservancy 3209 West 4 15454-F (Abandoned) District 28th St. Greeley CO 80631 Monarch Mountain Monitoring Minerals& 5 397691 Gee MW-3 Wel Aggregate PO Box 680 Frederick CO 80530 William E. 8605 WCR Fort 6 284947-A Domestic Well Gee 25 Lupton CO 80621 Monarch Mountain Monitoring Minerals& 7 10004056 Gee MW-5 Well Aggregate PO Box 680 Frederick CO 80530 General Richard & 8607 WCR Fort 8 67235-F Purpose Mary Flos 25 Lupton CO 80621 Monarch Mountain Monitoring Minerals& 9 317692 Gee MW-4 Well Aggregate PO Box 680 Frederick CO 80530 Monitoring PEC PO Box 10 224909 MWO8 Well Midwest LLC 1642 Houston TX 77251 Monitoring PEC PO Box 11 224910 MWO9 Well Midwest LLC 1642 Houston TX 77251 Monitoring PEC PO Box 12 224911 MW10 Well Midwest LLC 1642 Houston TX 77251 • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application Monitoring PEC PO Box 13 224912 MW11 Well Midwest LLC 1642 Houston TX 77251 Ginny Duncan, SW 333 West Investment Hampden, 14 258574 Domestic Well Group LLC Suite 810 Englewood CO 80110 Laura& Neil 9046 WCR Fort 15 0359525 Domestic Well Coyle 25 Lupton CO 80621 Campion& Chase Fort 16 0366200 Domestic Wel Cooley 8924 CR 25 Lupton CO 80621 Hugo Barron Sierra& Marguerite 14751 E Melindy County Line 17 0422873 Domestic Wel Barron Rd. Longmont CO 80504 William E. 8605 WCR Fort 18 0203567 Domestic Wel Gee 25 Lupton CO 80621 Northern Colorado Constructors Fort 19 224181 Abandoned Inc. 9075 CR 10 Lupton CO 80621 333 W South Hampden Monitoring Adams Ave. Suite 20 0040632 Well County WSD 1050 Englewood CO 80110 At the time of SWSP application amendment/approval, a new/amended gravel pit well permit will be applied for/obtained to include the evaporative and operational losses from the property. If the proposed use of groundwater at the NCCI Pit #1 mining site results in material injury to surrounding wells, NCC will ensure that all necessary measures are taken to address the issues. Water Quality An NPDES permit will be obtained from the Water Quality Control Division at the Colorado Department of Public Health & Environment for the NCCI Pit #1 amendment area prior to discharging any groundwater that is dewatered from the site. This permit will be kept current and amended as necessary to ensure that any water discharged from the site will meet the permitted water quality standards. Impacts to Groundwater/Hydrologic Balance NCC will monitor the groundwater levels surrounding the site and provide groundwater recharge if necessary via perimeter ditches/ponds. NCC will construct these ditches/ponds in the locations where direct discharge to an existing adjacent irrigation lateral is not available to ensure that stabilized groundwater levels are maintained. They will discharge dewatering flows into existing adjacent irrigation laterals where possible to limit the disturbance to the surrounding land. A slurry wall liner is proposed around the Northwest and South Cells and will likely be installed prior to the mining starting. • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application To summarize the mitigation process, as the mining/dewatering occurs, NCC will monitor the groundwater levels adjacent to mine as the mining progresses. If groundwater levels drop to a level that prevents an adjacent well from performing acceptably, according to that well's owner, NCC will either implement a groundwater recharge ditch/pond near the well in order to raise the groundwater level in the vicinity of the well and hence return it's operation to acceptable standards, or will negotiate an agreement with that well owner to replace the well or provide replacement water via other means until the mining and reclamation activities are concluded but it is not anticipated that any groundwater levels will drop since the slurry wall will be installed prior to exposing groundwater in the Northwest and South Cells. Groundwater wells that are not owned by NCC are potentially located within 600 feet of the mining limits. The exact physical location of these wells will be determined during the SWSP and well permit application processes. If wells are found to be within 600 feet of the mining limits, NCC will either obtain a well waiver from the owner of the well, or provide an agreement with the well owner that NCC will mitigate and material damage to the well that is directly attributable to the mining and reclamation of the site. All other wells within 600 feet of the mining limits are either owned by NCC, or are monitoring wells therefore groundwater impacts to these wells do not need to be addressed. See the attached Piezometer Location Map, and Piezometer Data Summary, which show the locations of monitoring wells around the perimeter of the site that NCC has either installed or has access to, and the groundwater level data that has been collected for each well. The groundwater monitoring data will be provided for what has been done to date with this permit application and then submitted in the annual report for the pit to the DRMS after approval of the permit application. Groundwater Quality Monitoring Plan The majority of the mining operations at this site will be within the slurry wall lined area with the exception of the Northeast Cell where it will be wet mined. The other areas outside of the slurry wall will be limited to the scale house and haul roads for trucks coming into and out of the pit, which are not likely to affect groundwater quality. To establish pre-mining groundwater quality at the site NCC will have four monitor wells sampled quarterly. The samples will be taken by a qualified consultant and then tested by Eurofins Laboratories for the analytes listed in Tables 1-4 of the "Basic Standards for Groundwater." Once the baseline has been established, we would recommend bi-annual sampling to monitor the groundwater quality and a technical revision will be submitted to request the change. The quarterly sampling will continue until 5 quarters of data has been established. Once the baseline has been established, we would recommend annual sampling to monitor the groundwater quality and a technical revision will be submitted to request the change. NCC commits to establishing points of compliance following five quarters of baseline monitoring. Monitor Well 1 located on the southwest side of the permit boundary will be used as a background water quality sampling location and the remaining three monitoring wells as points of compliance (POC), the POCs will be Monitor Wells 2, 4, and 5. • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application When obtaining a monitor well sample typically at least 3 well volumes will be taken from the well to make sure a true groundwater sample is obtained. During the purging time, measuring pH, temperature, EC will occur at different times until stabilization occurs. Then the sample will be collected and placed in the lab provided bottle(s) for unfiltered samples. The sample will then be filtered prior to placement into the lab bottle(s) for Eurofins to run the testing on for the dissolved metals from Table 41. Sampling and collection of the groundwater from the monitor wells will reference the USGS National Field Manual for Collecting Water Quality Data Chapter A.4 Collection of Water Quality Samples and EPA Region 9 Groundwater Sampling Guide. The groundwater quality sampling data will be provided for what has been done to date with this permit application/adequacy review and then submitted in the quarterly report for the pit to the DRMS after approval of the permit application. NCC will notify the DRMS within 7 days of receiving a lab report that indicates any of the standards set forth in Tables 1-4 have been exceeded. If a lab report shows an exceedance, a new sample will be taken to verify exceedance or discount potential lab contamination. The groundwater quality testing data will be provided for what has been done to date with this permit application/adequacy review and then submitted at the following frequency to the DRMS: First quarter report due by May 1st of every year. Second quarter report due by August 1st of every year. Third quarter report due by November 1st of every year. Fourth quarter report due by February 1st of the following year. The report will include a site map with well locations, tabulated data for all parameters, graphs/plots of selected parameters, a narrative analysis of the data with any trends and/or anomalies identified, and graphs and tables of measured groundwater levels for all locations. The field sheets will be included in an appendix that demonstrates monitoring wells were purged and sampled according to the approved plan. • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application NCCI Pit 1 Expansion Area-Monitor Well Readings Well Designation G-1 G-2 G-4 G-5 Description Southwest Corner Southeast Corner Northeast Corner Northwest Corner Top of Well Elevation(ft) 4864.05 4865.06 4860.93 4858.21 Ground Elevation(ft) 4860.89 4861.44 4858.12 4855.29 Depth to Depth to Depth to Depth to Groundwater Depth to Groundwater Depth to Groundwater Depth to Groundwater Depth to from Top of Groundwater Elevation of from Top of Groundwater Elevation of from Top of Groundwater Elevation of from Top of Groundwater Elevation of Well from Ground Groundwater Well from Ground Groundwater Well from Ground Groundwater Well from Ground Groundwater Date (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) February 15,2024 7.38 4.22 4856.68 10.25 6.63 4854.81 8.67 5.86 4852.26 5.08 2.16 4853.13 March 13,2024 7.25 4.09 4856.80 9.92 6.30 4855.14 8.42 5.61 4852.51 4.67 1.75 4853.54 April 19,2024 7.17 4.01 4856.88 9.67 6.05 4855.39 8.17 5.36 4852.76 4.25 1.33 4853.96 May 15,2024 _ 6.83 3.67 4857.22 9.25 5.63 4855.81 7.92 5.11 4853.01 3.92 1.00 4854.29 June 11,2024 6.25 3.09 4857.80 8.42 4.80 4856.64 7.50 4.69 4853.43 3.17 0.25 4855.04 July 17,2024 6.00 2.84 4858.05 7.92 4.30 4857.14 6.92 4.11 4854.01 3.17 0.25 4855.04 August 13,2024 5.83 2.67 4858.22 7.75 4.13 4857.31 6.67 3.86 4854.26 3.00 0.08 4855.21 September 10,2024 _ 6.08 2.92 4857.97 7.83 4.21 4857.23 7.08 4.27 4853.85 3.25 0.33 4854.96 October 14,2024 6.58 3.42 4857.47 8.67 5.05 4856.39 7.42 4.61 4853.51 3.75 0.83 4854.46 November 21,2024 7.00 3.84 4857.05 9.25 5.63 4855.81 7.67 4.86 4853.26 4.08 1.16 4854.13 December 17,2024 7.33 4.17 4856.72 9.92 6.30 4855.14 8.25 5.44 4852.68 4.33 1.41 4853.88 January 22,2025 7.67 4.51 4856.38 10.25 6.63 4854.81 9.17 6.36 4851.76 4.67 1.75 4853.54 February 28,2025 7.58 4.42 4856.47 10.25 6.63 4854.81 8.75 5.94 4852.18 4.75 1.83 4853.46 March 18,2025 7.50 4.34 4856.55 10.00 6.38 4855.06 8.50 5.69 4852.43 4.58 1.66 4853.63 April 10,2025 7.33 4.17 4856.72 9.83 6.21 4855.23 8.17 5.36 4852.76 4.42 1.50 4853.79 May 14,2025 6.58 3.42 4857.47 9.08 5.46 4855.98 8.00 5.19 4852.93 3.92 1.00 4854.29 June 13,2025 6.08 2.92 4857.97 8.17 4.55 4856.89 7.83 5.02 4853.10 3.33 0.41 4854.88 July 25,2025 6.67 3.51 4857.38 9.25 5.63 4855.81_ 8.17 5.36 4852.76 3.83 0.91 4854.38 August 18,2025 6.25 3.09 4857.80 9.42 5.80 4855.64 8.50 5.69 4852.43 3.67 0.75 4854.54 September 19,2025 6.17 3.01 4857.88 9.50 5.88 4855.56 8.25 5.44 4852.68 3.42 0.50 4854.79 October 25,2025 6.10 2.94 4857.95 9.30 5.68 4855.76 8.40 5.59 4852.53 3.70 0.78 4854.51 November 14,2025 6.42 3.26 4857.63 9.58 5.96 4855.48 8.58 5.77 4852.35 4.00 1.08 4854.21 December 4,2025 7.17 4.01 4856.88 10.00 6.38 4855.06 8.83 6.02 4852.10 4.42 1.50 4853.79 January 6,2026 7.42 4.26 4856.63 10.17 6.55 4854.89 8.92 6.11 4852.01 4.67 1.75 4853.54 Minimum 5.83 2.67 4856.38 7.75 4.13 4854.81 6.67 3.86 4851.76 3.00 0.08 4853.13 Maximum 7.67 4.51 4858.22 10.25 6.63 4857.31 9.17 6.36 4854.26 5.08 2.16 4855.21 Average 6.78 3.62 4857.27 9.32 5.70 4855.74 8.11 5.30 4852.82 4.00 1.08 4854.21 NCC Gee Monitor Wells Elevation of Groundwater 4,859 4,858 • — 4,857 — - l_ 4,856 . I— LL 1 Z 4855, W 1 W 4,854 4,853 4,852 - — — - • — • 4,851 m m m d- d- d- d- d- d- d- d- d- d- d- d- Ln un U L.r) Lo tr, io N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N '' U> C L L >- C - GO Q 4' > U C _6 L i > C - GO Q 4' > U C _6 L U a N N ro a N = 7 N U 0 N N c9 Q cu 7 D 7 N U 0 N O1 f4 0 z o LL g a g < v) 0 z o LL g a g < � 0 z o LL g ril DATE J&T Consulting, Inc. -0-G 1 -0-G 2 -•-G4 • G5 NCC Gee Monitor Wells Depth to Groundwater Measured From Top of Well 12 10 s 6 4 2 0 - — M m M *zr Tr V d' V Lfl Ln Lf1 V1 Ln V1 Lf1 l!1 LnLf1 U l0 LU lD N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N 4„ > c.) C _ i T C - t10 Q +' > U C i ? C - h.0 Q 4, > U Q O O p f6 �i Q @ N O 0 p f6 i co Q (1:3 O 0 p f° i @ Z 2 Q z 2 Q z 2 IIL. DATE ia J&T Consulting, Inc. -*-G1 -0-G2 -.-G4 G5 NCC Gee Monitor Wells Depth to Groundwater Measured From Ground 7 6 . _. _ 3 2 1 0 M M M d- Kzr d' V LIl L!1 t.f1 Lf1 Ln Lfl t.f1 Ln Lf1 V1 LD LO lD N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N , 6 C i • C - Lilo Q +' > U C i • C - Up Q 4, > U Q O O p f 6 Li co Q @ ., O 0 p f 6 ii ca Q v O ) co Li @ z 2 Q z 2 Q z 2 IIL. DATE ia J&T Consulting, Inc. -*-G1 -0-G2 -.-G4 • G5 Monitor Well Reg 41 Values 2025 Means meets regulation Number Element (mg/I) Q3 Q4 Result(mg/I) Result(mg/I) A zero reading means Not Detected G-1 Fluoride 2 0.86 1.1 Chloride 250 140 150 Sulfate 250 310 330 Nitrogen,Nitrate(NO3) 10 Nitrogen,Nitrite(NO2) 1 Nitrogen+Nitrate as Nitrogen 10 0 0 Solids,Total Dissolved X 1000 1000 Dissolved Metal Analysis Element Recommendation Aluminum 5 0 0 These elements exceeded Reg 41 Antimony 0.006 0 0 Sulfate thresholds during at least one Arsenic 0.01 0.0022 0.0021 Iron quarter in at least one well, Barium 2 0.094 0.099 Manganese therefore they should continue Beryllium 0.004 0 0 Uranium to be included in future testing Boron 0.75 0.2 0.28 TDS Cadmium 0.005 0.00045 0.00035 Aluminum Chromium 0.1 0 0 Cobalt 0.05 0.0028 0.0033 Copper 0.2 0.0063 0.0061 Iron 0.3 0 0 Lead 0.05 0 0 Lithium 2.5 0.037 0.045 Manganese 0.05 1.8 1.8 Mercury 0.002 0 0 Molybdenum 0.21 0.0076 0.0061 Nickel 0.1 0.0063 0.0058 Selenium 0.02 0 0 Silver 0.05 0 0 Thallium 0.002 0 0 Uranium 0.03 0.024 0.017 Vanadium 0.1 0.004 0.0019 Zinc 2 0 0 Monitor Well Reg 41 Values 2025 Means meets regulation Number Element (mg/I) Q3 Q4 Result(mg/I) Result(mg/I) A zero reading means Not Detected G-2 Fluoride 2 1.1 1.3 Chloride 250 150 150 Sulfate 250 350 350 Nitrogen,Nitrate(NO3) 10 Nitrogen,Nitrite(NO2) 1 Nitrogen+Nitrate as Nitrogen 10 1.0 0.86 Solids,Total Dissolved X 1300 1000 Dissolved Metal Analysis Element Recommendation Aluminum 5 2 0 These elements exceeded Reg 41 Antimony 0.006 0 0 Sulfate thresholds during at least one Arsenic 0.01 0.0011 0.00062 Iron quarter in at least one well, Barium 2 0.11 0.083 Manganese therefore they should continue Beryllium 0.004 0 0 Uranium to be included in future testing Boron 0.75 0.26 0.26 TDS Cadmium 0.005 0 0 Aluminum Chromium 0.1 0.0012 0 Cobalt 0.05 0.0013 0.00064 Copper 0.2 0.003 0.0013 Iron 0.3 0.99 0 Lead 0.05 0.00079 0 Lithium 2.5 0.029 0.034 Manganese 0.05 0.23 0.028 Mercury 0.002 0 0 Molybdenum 0.21 0.001 0.0021 Nickel 0.1 0.0036 0.002 Selenium 0.02 0.0065 0.0058 Silver 0.05 0 0 Thallium 0.002 0 0 Uranium 0.03 0.027 0.026 Vanadium 0.1 0.0035 0 Zinc 2 0.0083 0 Monitor Well Reg 41 Values 2025 Means meets regulation Number Element (mg/I) Q3 Q4 Result(mg/I) Result(mg/I) A zero reading means Not Detected G-4 Fluoride 2 1.2 1.5 Chloride 250 160 150 Sulfate 250 340 330 Nitrogen,Nitrate(NO3) 10 Nitrogen,Nitrite(NO2) 1 Nitrogen+Nitrate as Nitrogen 10 0.37 0.44 Solids,Total Dissolved X 1200 990 Dissolved Metal Analysis Element Recommendation Aluminum 5 11 0 These elements exceeded Reg 41 Antimony 0.006 0.0007 0 Sulfate thresholds during at least one Arsenic 0.01 0.0032 0.00084 Iron quarter in at least one well, Barium 2 0.3 0.08 Manganese therefore they should continue Beryllium 0.004 0.0003 0 Uranium to be included in future testing Boron 0.75 0.24 0.27 TDS Cadmium 0.005 0.00044 0 Aluminum Chromium 0.1 0.0071 0 Cobalt 0.05 0.014 0.0016 Copper 0.2 0.02 0.0028 Iron 0.3 7.9 0 Lead 0.05 0.0058 0 Lithium 2.5 0.038 0.038 Manganese 0.05 3.6 0.59 Mercury 0.002 0 0 Molybdenum 0.21 0.014 0.0092 Nickel 0.1 0.014 0.0033 Selenium 0.02 0.0015 0.0014 Silver 0.05 0 0 Thallium 0.002 0 0 Uranium 0.03 0.03 0.026 Vanadium 0.1 0.015 0 Zinc 2 0.033 0 Monitor Well Reg 41 Values 2025 Means meets regulation Number Element (mg/I) Q3 Q4 Result(mg/I) Result(mg/I) A zero reading means Not Detected G-5 Fluoride 2 0.84 1.1 Chloride 250 140 120 Sulfate 250 240 230 Nitrogen,Nitrate(NO3) 10 Nitrogen,Nitrite(NO2) 1 Nitrogen+Nitrate as Nitrogen 10 0 0 Solids,Total Dissolved X 950 760 Dissolved Metal Analysis Element Recommendation Aluminum 5 3.9 0 These elements exceeded Reg 41 Antimony 0.006 0 0 Sulfate thresholds during at least one Arsenic 0.01 0.0023 0.00088 Iron quarter in at least one well, Barium 2 0.097 0.079 Manganese therefore they should continue Beryllium 0.004 0 0 Uranium to be included in future testing Boron 0.75 0.24 0.23 TDS Cadmium 0.005 0 0 Aluminum Chromium 0.1 0.0032 0 Cobalt 0.05 0.0023 0.00077 Copper 0.2 0.011 0.0021 Iron 0.3 4.1 0 Lead 0.05 0.0044 0 Lithium 2.5 0.034 0.04 Manganese 0.05 0.19 0.056 Mercury 0.002 0 0 Molybdenum 0.21 0.0057 0.0054 Nickel 0.1 0.0046 0.0022 Selenium 0.02 0 0 Silver 0.05 0 0 Thallium 0.002 0 0 Uranium 0.03 0.016 0.013 Vanadium 0.1 0.011 0 Zinc 2 0.019 0 tiff eurofins O Environment Testing ANALYTICAL REPORT PREPARED FOR Attn: J.C. York J&T Consulting, Inc. 305 Denver Avenue, Suite D Fort Lupton, Colorado 80621 Generated 8/29/2025 2.59.00 PM JOB DESCRIPTION Quarterly Monitoring Wells - NCCI Pit #1 JOB NUMBER 280-212147-1 Eurofins Denver 4955 Yarrow Street Arvada CO 80002 See page two for job notes and contact information. Page 1 of 28 �'� E O L. Eurofins Denver 0 Job Notes This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written approval of the laboratory. All questions should be directed to the Eurofins TestAmerica Project Manager. Authorization I - Generated 8/29/2025 2:59:00 PM Authorized for release by Shelby McCabe, Project Manager I Shelby.McCabe@et.eurofinsus.com (303)736-0165 Eurofins Denver is a laboratory within TestAmerica Laboratories,Inc.,a company within Eurofins Environment Testing Group of Companies Page 2 of 28 8/29/2025 Client: J&T Consulting, Inc. Laboratory Job ID:280-212147-1 Project/Site: Quarterly Monitoring Wells-NCCI Pit#1 Table of Contents Cover Page 1 Table of Contents 3 Definitions 4 Case Narrative 5 Detection Summary 6 Method Summary 8 Sample Summary 9 Client Sample Results 10 QC Sample Results 15 QC Association 21 Chronicle 24 Certification Summary 26 Chain of Custody 27 Receipt Checklists 28 Eurofins Denver Page 3 of 28 8/29/2025 Definitions/Glossary Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Qualifiers Metals Qualifier Qualifier Description 4 MS,MSD:The analyte present in the original sample is greater than 4 times the matrix spike concentration;therefore,control limits are not applicable. Fl MS and/or MSD recovery exceeds control limits. J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. General Chemistry Qualifier Qualifier Description J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. Glossary Abbreviation These commonly used abbreviations may or may not be present in this report. Listed under the"D"column to designate that the result is reported on a dry weight basis %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio(normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit(DoD/DOE) DL,RA,RE,IN Indicates a Dilution,Re-analysis,Re-extraction,or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration(Radiochemistry) EDL Estimated Detection Limit(Dioxin) LOD Limit of Detection(DoD/DOE) LOQ Limit of Quantitation(DoD/DOE) MCL EPA recommended"Maximum Contaminant Level" MDA Minimum Detectable Activity(Radiochemistry) MDC Minimum Detectable Concentration(Radiochemistry) MDL Method Detection Limit ML Minimum Level(Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit(or MDL or EDL if shown) NEG Negative/Absent POS Positive/Present PQL Practical Quantitation Limit PRES Presumptive QC Quality Control RER Relative Error Ratio(Radiochemistry) RL Reporting Limit or Requested Limit(Radiochemistry) RPD Relative Percent Difference,a measure of the relative difference between two points TEF Toxicity Equivalent Factor(Dioxin) TEQ Toxicity Equivalent Quotient(Dioxin) TNTC Too Numerous To Count Eurofins Denver Page 4 of 28 8/29/2025 Case Narrative Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project: Quarterly Monitoring Wells- NCCI Pit#1 Job ID: 280-212147-1 Eurofins Denver Job Narrative 280-212147-1 4 The analytical test results presented in this report meet all requirements of the associated regulatory program listed on the Accreditation/Certification Summary Page, unless otherwise noted. Data qualifiers and/or narrative comments are included to explain any exceptions, if applicable. Regulated compliance samples(e.g. SDWA, NPDES)must comply with associated agency requirements/permits. • Matrix-specific batch QC (e.g., MS, MSD, SD)may not be reported when insufficient sample volume is available or when site- specific QC samples are not submitted. In such cases, a Laboratory Control Sample Duplicate(LCSD)may be analyzed to provide precision data for the batch. • For samples analyzed using surrogate and/or isotope dilution analytes, any recoveries falling outside of established acceptance criteria are re-prepared and/or re-analyzed to confirm results, unless the deviation is due to sample dilution or otherwise explained in the case narrative. Receipt The samples were received on 8/19/2025 11:35 AM. Unless otherwise noted below,the samples arrived in good condition, and, where required, properly preserved and on ice. The temperature of the cooler at receipt time was 2.2°C. Method 200.7 Rev 4.4-Metals(ICP)-Dissolved Samples MW-1 (280-212147-1), MW-2(280-212147-2), MW-4(280-212147-3)and MW-5(280-212147-4)were analyzed for Metals(ICP)-Dissolved. The samples were prepared on 8/20/2025 and analyzed on 8/21/2025. Method 200.8-Metals(ICP/MS)-Dissolved Samples MW-1 (280-212147-1), MW-2(280-212147-2), MW-4(280-212147-3)and MW-5(280-212147-4)were analyzed for Metals(ICP/MS)-Dissolved. The samples were prepared on 8/20/2025 and analyzed on 8/23/2025 and 8/24/2025. The matrix spike/matrix spike duplicate(MS/MSD)recoveries for preparation batch 280-709826 and analytical batch 280-710479 were outside control limits for one or more analytes. See QC Sample Results for detail. Sample matrix interference and/or non- homogeneity are suspected because the associated laboratory control sample(LCS)recovery is within acceptance limits. The matrix spike/matrix spike duplicate(MS/MSD)recoveries for preparation batch 280-709826 and analytical batch 280-710494 were outside control limits for one or more analytes. See QC Sample Results for detail. Sample matrix interference and/or non- homogeneity are suspected because the associated laboratory control sample(LCS)recovery is within acceptance limits. Method 245.1 -Mercury(CVAA)-Dissolved Samples MW-1 (280-212147-1), MW-2(280-212147-2), MW-4(280-212147-3)and MW-5(280-212147-4)were analyzed for Mercury(CVAA)-Dissolved. The samples were prepared on 8/20/2025 and 8/21/2025 and analyzed on 8/21/2025. Method SM 2540C-Solids,Total Dissolved (TDS) Samples MW-1 (280-212147-1), MW-2(280-212147-2), MW-4(280-212147-3)and MW-5(280-212147-4)were analyzed for Solids, Total Dissolved (TDS). The samples were analyzed on 8/20/2025. Method 300.0-Anions, Ion Chromatography-Dissolved Samples MW-1 (280-212147-1), MW-2(280-212147-2), MW-4(280-212147-3)and MW-5(280-212147-4)were analyzed for Anions, Ion Chromatography-Dissolved. The samples were analyzed on 8/20/2025 and 8/21/2025. Samples MW-1 (280-212147-1)[5x], MW-2(280-212147-2)[5x], MW-4(280-212147-3)[5x]and MW-5(280-212147-4)[5x] required dilution prior to analysis. The reporting limits have been adjusted accordingly. Method 353.2-Nitrogen, Nitrate-Nitrite Samples MW-1 (280-212147-1), MW-2(280-212147-2), MW-4(280-212147-3)and MW-5(280-212147-4)were analyzed for Nitrogen, Nitrate-Nitrite. The samples were analyzed on 8/27/2025. Eurofins Denver Page 5 of 28 8/29/2025 Detection Summary Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Client Sample ID: MW-1 Lab Sample ID: 280-212147-1 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Boron 0.20 0.050 0.015 mg/L 1 200.7 Rev 4.4 Dissolved Lithium 0.037 0.020 0.010 mg/L 1 200.7 Rev 4.4 Dissolved Arsenic 0.0022 0.0020 0.00050 mg/L 1 200.8 Dissolved Barium 0.094 0.0020 0.00055 mg/L 1 200.8 Dissolved Cadmium 0.00045 J 0.0010 0.00025 mg/L 1 200.8 Dissolved Cobalt 0.0028 0.0010 0.00025 mg/L 1 200.8 Dissolved Copper 0.0063 0.0020 0.0010 mg/L 1 200.8 Dissolved Manganese 1.8 0.0030 0.0015 mg/L 1 200.8 Dissolved Molybdenum 0.0076 0.0020 0.00050 mg/L 1 200.8 Dissolved Nickel 0.0063 0.0030 0.0010 mg/L 1 200.8 Dissolved Uranium 0.024 0.0010 0.00025 mg/L 1 200.8 Dissolved Vanadium 0.0040 J 0.0050 0.0015 mg/L 1 200.8 Dissolved Total Dissolved Solids(TDS) 1000 20 12 mg/L 1 SM 2540C Total/NA Chloride 140 3.0 1.3 mg/L 1 300.0 Dissolved Sulfate 310 15 6.5 mg/L 5 300.0 Dissolved Fluoride 0.86 0.50 0.20 mg/L 1 300.0 Dissolved Client Sample ID: MW-2 Lab Sample ID: 280-212147-2 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Boron 0.26 0.050 0.015 mg/L 1 200.7 Rev 4.4 Dissolved Lithium 0.029 0.020 0.010 mg/L 1 200.7 Rev 4.4 Dissolved Aluminum 2.0 0.10 0.025 mg/L 1 200.8 Dissolved Arsenic 0.0011 J 0.0020 0.00050 mg/L 1 200.8 Dissolved Barium 0.11 0.0020 0.00055 mg/L 1 200.8 Dissolved Cobalt 0.0013 0.0010 0.00025 mg/L 1 200.8 Dissolved Chromium 0.0012 J 0.0030 0.0010 mg/L 1 200.8 Dissolved Copper 0.0030 0.0020 0.0010 mg/L 1 200.8 Dissolved Iron 0.99 0.20 0.050 mg/L 1 200.8 Dissolved Manganese 0.23 0.0030 0.0015 mg/L 1 200.8 Dissolved Molybdenum 0.0010 J 0.0020 0.00050 mg/L 1 200.8 Dissolved Nickel 0.0036 0.0030 0.0010 mg/L 1 200.8 Dissolved Lead 0.00079 J 0.0010 0.00050 mg/L 1 200.8 Dissolved Selenium 0.0065 0.0020 0.00050 mg/L 1 200.8 Dissolved Uranium 0.027 0.0010 0.00025 mg/L 1 200.8 Dissolved Vanadium 0.0035 J 0.0050 0.0015 mg/L 1 200.8 Dissolved Zinc 0.0083 J 0.010 0.0050 mg/L 1 200.8 Dissolved Nitrate Nitrite as N 1.0 0.20 0.060 mg/L 1 353.2 Total/NA Total Dissolved Solids(TDS) 1300 20 12 mg/L 1 SM 2540C Total/NA Chloride 150 3.0 1.3 mg/L 1 300.0 Dissolved Sulfate 350 15 6.5 mg/L 5 300.0 Dissolved Fluoride 1.1 0.50 0.20 mg/L 1 300.0 Dissolved Client Sample ID: MW-4 Lab Sample ID: 280-212147-3 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Boron 0.24 0.050 0.015 mg/L 1 200.7 Rev 4.4 Dissolved Lithium 0.038 0.020 0.010 mg/L 1 200.7 Rev 4.4 Dissolved Aluminum 11 0.10 0.025 mg/L 1 200.8 Dissolved Arsenic 0.0032 0.0020 0.00050 mg/L 1 200.8 Dissolved Barium 0.30 0.0020 0.00055 mg/L 1 200.8 Dissolved Beryllium 0.00030 J 0.0010 0.00025 mg/L 1 200.8 Dissolved This Detection Summary does not include radiochemical test results. Eurofins Denver Page 6 of 28 8/29/2025 Detection Summary Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Client Sample ID: MW-4 (Continued) Lab Sample ID: 280-212147-3 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Cadmium 0.00044 J 0.0010 0.00025 mg/L 1 200.8 Dissolved Cobalt 0.014 0.0010 0.00025 mg/L 1 200.8 Dissolved 0 Chromium 0.0071 0.0030 0.0010 mg/L 1 200.8 Dissolved Copper 0.020 0.0020 0.0010 mg/L 1 200.8 Dissolved Iron 7.9 0.20 0.050 mg/L 1 200.8 Dissolved Manganese 3.6 0.0030 0.0015 mg/L 1 200.8 Dissolved Molybdenum 0.014 0.0020 0.00050 mg/L 1 200.8 Dissolved Nickel 0.014 0.0030 0.0010 mg/L 1 200.8 Dissolved Lead 0.0058 0.0010 0.00050 mg/L 1 200.8 Dissolved Antimony 0.00070 J 0.0020 0.00050 mg/L 1 200.8 Dissolved Selenium 0.0015 J 0.0020 0.00050 mg/L 1 200.8 Dissolved Uranium 0.030 0.0010 0.00025 mg/L 1 200.8 Dissolved Vanadium 0.015 0.0050 0.0015 mg/L 1 200.8 Dissolved Zinc 0.033 0.010 0.0050 mg/L 1 200.8 Dissolved Nitrate Nitrite as N 0.37 0.20 0.060 mg/L 1 353.2 Total/NA Total Dissolved Solids(TDS) 1200 20 12 mg/L 1 SM 2540C Total/NA Chloride 160 3.0 1.3 mg/L 1 300.0 Dissolved Sulfate 340 15 6.5 mg/L 5 300.0 Dissolved Fluoride 1.2 0.50 0.20 mg/L 1 300.0 Dissolved Client Sample ID: MW-5 Lab Sample ID: 280-212147-4 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Boron 0.24 0.050 0.015 mg/L 1 200.7 Rev 4.4 Dissolved Lithium 0.034 0.020 0.010 mg/L 1 200.7 Rev 4.4 Dissolved Aluminum 3.9 0.10 0.025 mg/L 1 200.8 Dissolved Arsenic 0.0023 0.0020 0.00050 mg/L 1 200.8 Dissolved Barium 0.097 0.0020 0.00055 mg/L 1 200.8 Dissolved Cobalt 0.0023 F1 0.0010 0.00025 mg/L 1 200.8 Dissolved Chromium 0.0032 F1 0.0030 0.0010 mg/L 1 200.8 Dissolved Copper 0.011 F1 0.0020 0.0010 mg/L 1 200.8 Dissolved Iron 4.1 0.20 0.050 mg/L 1 200.8 Dissolved Manganese 0.19 0.0030 0.0015 mg/L 1 200.8 Dissolved Molybdenum 0.0057 F1 0.0020 0.00050 mg/L 1 200.8 Dissolved Nickel 0.0046 F1 0.0030 0.0010 mg/L 1 200.8 Dissolved Lead 0.0044 F1 0.0010 0.00050 mg/L 1 200.8 Dissolved Uranium 0.016 F1 0.0010 0.00025 mg/L 1 200.8 Dissolved Vanadium 0.011 F1 0.0050 0.0015 mg/L 1 200.8 Dissolved Zinc 0.019 0.010 0.0050 mg/L 1 200.8 Dissolved Total Dissolved Solids(TDS) 950 10 6.0 mg/L 1 SM 2540C Total/NA Chloride 140 3.0 1.3 mg/L 1 300.0 Dissolved Sulfate 240 15 6.5 mg/L 5 300.0 Dissolved Fluoride 0.84 0.50 0.20 mg/L 1 300.0 Dissolved This Detection Summary does not include radiochemical test results. Eurofins Denver Page 7 of 28 8/29/2025 Method Summary Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Method Method Description Protocol Laboratory 200.7 Rev 4.4 Metals(ICP) EPA EET DEN 200.8 Metals(ICP/MS) EPA EET DEN 245.1 Mercury(CVAA) EPA EET DEN 300.0 Anions,Ion Chromatography EPA EET DEN 353.2 Nitrogen,Nitrate-Nitrite EPA EET DEN SM 2540C Solids,Total Dissolved(TDS) SM EET DEN =< 200.7 Preparation,Total Recoverable Metals EPA EET DEN 200.8 Preparation,Total Recoverable Metals EPA EET DEN 245.1 Preparation,Mercury EPA EET DEN Protocol References: EPA=US Environmental Protection Agency SM="Standard Methods For The Examination Of Water And Wastewater" Laboratory References: EET DEN=Eurofins Denver,4955 Yarrow Street,Arvada,CO 80002,TEL(303)736-0100 Eurofins Denver Page 8 of 28 8/29/2025 Sample Summary Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Lab Sample ID Client Sample ID Matrix Collected Received Sample Origin 280-212147-1 MW-1 Water 08/18/25 05:05 08/19/25 11:35 Colorado 280-212147-2 MW-2 Water 08/18/25 05:22 08/19/25 11:35 Colorado 280-212147-3 MW-4 Water 08/18/25 05:45 08/19/25 11:35 Colorado 280-212147-4 MW-5 Water 08/18/25 04:45 08/19/25 11:35 Colorado Eurofins Denver Page 9 of 28 8/29/2025 Client Sample Results Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Method: EPA 200.7 Rev 4.4 - Metals (ICP) - Dissolved Client Sample ID: MW-1 Lab Sample ID: 280-212147-1 Date Collected: 08/18/25 05:05 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Boron 0.20 0.050 0.015 mg/L 08/20/25 07:46 08/21/25 22:10 1 Lithium 0.037 0.020 0.010 mg/L 08/20/25 07:46 08/21/25 22:10 1 Client Sample ID: MW-2 Lab Sample ID: 280-212147-2 Date Collected: 08/18/25 05:22 Matrix: Water Date Received: 08/19/25 11:35 8 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Oil Fac Boron 0.26 0.050 0.015 mg/L 08/20/25 07:46 08/21/25 22:14 1 Lithium 0.029 0.020 0.010 mg/L 08/20/25 07:46 08/21/25 22:14 1 Client Sample ID: MW-4 Lab Sample ID: 280-212147-3 Date Collected: 08/18/25 05:45 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Boron 0.24 0.050 0.015 mg/L 08/20/25 07:46 08/21/25 22:18 1 Lithium 0.038 0.020 0.010 mg/L 08/20/25 07:46 08/21/25 22:18 1 Client Sample ID: MW-5 Lab Sample ID: 280-212147-4 Date Collected: 08/18/25 04:45 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Oil Fac Boron 0.24 0.050 0.015 mg/L 08/20/25 07:49 08/21/25 22:23 1 Lithium 0.034 0.020 0.010 mg/L 08/20/25 07:49 08/21/25 22:23 1 Method: EPA 200.8 - Metals (ICP/MS) - Dissolved Client Sample ID: MW-1 Lab Sample ID: 280-212147-1 Date Collected: 08/18/25 05:05 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Silver ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 06:43 1 Aluminum ND 0.10 0.025 mg/L 08/20/25 07:46 08/23/25 06:43 1 Arsenic 0.0022 0.0020 0.00050 mg/L 08/20/25 07:46 08/23/25 06:43 1 Barium 0.094 0.0020 0.00055 mg/L 08/20/25 07:46 08/23/25 06:43 1 Beryllium ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/24/25 22:49 1 Cadmium 0.00045 J 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 06:43 1 Cobalt 0.0028 0.0010 0.00025 mg/L 08/20/25 07:46 08/24/25 22:49 1 Chromium ND 0.0030 0.0010 mg/L 08/20/25 07:46 08/23/25 06:43 1 Copper 0.0063 0.0020 0.0010 mg/L 08/20/25 07:46 08/24/25 22:49 1 Iron ND 0.20 0.050 mg/L 08/20/25 07:46 08/24/25 22:49 1 Manganese 1.8 0.0030 0.0015 mg/L 08/20/25 07:46 08/23/25 06:43 1 Molybdenum 0.0076 0.0020 0.00050 mg/L 08/20/25 07:46 08/23/25 06:43 1 Nickel 0.0063 0.0030 0.0010 mg/L 08/20/25 07:46 08/23/25 06:43 1 Lead ND 0.0010 0.00050 mg/L 08/20/25 07:46 08/23/25 06:43 1 Antimony ND 0.0020 0.00050 mg/L 08/20/25 07:46 08/23/25 06:43 1 Selenium ND 0.0020 0.00050 mg/L 08/20/25 07:46 08/23/25 06:43 1 Thallium ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 06:43 1 Uranium 0.024 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 06:43 1 Vanadium 0.0040 J 0.0050 0.0015 mg/L 08/20/25 07:46 08/23/25 06:43 1 Zinc ND 0.010 0.0050 mg/L 08/20/25 07:46 08/23/25 06:43 1 Eurofins Denver Page 10 of 28 8/29/2025 Client Sample Results Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Method: EPA 200.8 - Metals (ICP/MS) - Dissolved Client Sample ID: MW-2 Lab Sample ID: 280-212147-2 Date Collected: 08/18/25 05:22 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Silver ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 06:46 1 Aluminum 2.0 0.10 0.025 mg/L 08/20/25 07:46 08/23/25 06:46 1 Arsenic 0.0011 J 0.0020 0.00050 mg/L 08/20/25 07:46 08/23/25 06:46 1 Barium 0.11 0.0020 0.00055 mg/L 08/20/25 07:46 08/23/25 06:46 1 Beryllium ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/24/25 22:51 1 Cadmium ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 06:46 1 8 Cobalt 0.0013 0.0010 0.00025 mg/L 08/20/25 07:46 08/24/25 22:51 1 Chromium 0.0012 J 0.0030 0.0010 mg/L 08/20/25 07:46 08/23/25 06:46 1 Copper 0.0030 0.0020 0.0010 mg/L 08/20/25 07:46 08/24/25 22:51 1 Iron 0.99 0.20 0.050 mg/L 08/20/25 07:46 08/24/25 22:51 1 Manganese 0.23 0.0030 0.0015 mg/L 08/20/25 07:46 08/23/25 06:46 1 Molybdenum 0.0010 J 0.0020 0.00050 mg/L 08/20/25 07:46 08/23/25 06:46 1 Nickel 0.0036 0.0030 0.0010 mg/L 08/20/25 07:46 08/23/25 06:46 1 Lead 0.00079 J 0.0010 0.00050 mg/L 08/20/25 07:46 08/23/25 06:46 1 Antimony ND 0.0020 0.00050 mg/L 08/20/25 07:46 08/23/25 06:46 1 Selenium 0.0065 0.0020 0.00050 mg/L 08/20/25 07:46 08/23/25 06:46 1 Thallium ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 06:46 1 Uranium 0.027 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 06:46 1 Vanadium 0.0035 J 0.0050 0.0015 mg/L 08/20/25 07:46 08/23/25 06:46 1 Zinc 0.0083 J 0.010 0.0050 mg/L 08/20/25 07:46 08/23/25 06:46 1 Client Sample ID: MW-4 Lab Sample ID: 280-212147-3 Date Collected: 08/18/25 05:45 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Silver ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 06:49 1 Aluminum 11 0.10 0.025 mg/L 08/20/25 07:46 08/23/25 06:49 1 Arsenic 0.0032 0.0020 0.00050 mg/L 08/20/25 07:46 08/23/25 06:49 1 Barium 0.30 0.0020 0.00055 mg/L 08/20/25 07:46 08/23/25 06:49 1 Beryllium 0.00030 J 0.0010 0.00025 mg/L 08/20/25 07:46 08/24/25 22:54 1 Cadmium 0.00044 J 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 06:49 1 Cobalt 0.014 0.0010 0.00025 mg/L 08/20/25 07:46 08/24/25 22:54 1 Chromium 0.0071 0.0030 0.0010 mg/L 08/20/25 07:46 08/23/25 06:49 1 Copper 0.020 0.0020 0.0010 mg/L 08/20/25 07:46 08/24/25 22:54 1 Iron 7.9 0.20 0.050 mg/L 08/20/25 07:46 08/24/25 22:54 1 Manganese 3.6 0.0030 0.0015 mg/L 08/20/25 07:46 08/23/25 06:49 1 Molybdenum 0.014 0.0020 0.00050 mg/L 08/20/25 07:46 08/23/25 06:49 1 Nickel 0.014 0.0030 0.0010 mg/L 08/20/25 07:46 08/23/25 06:49 1 Lead 0.0058 0.0010 0.00050 mg/L 08/20/25 07:46 08/23/25 06:49 1 Antimony 0.00070 J 0.0020 0.00050 mg/L 08/20/25 07:46 08/23/25 06:49 1 Selenium 0.0015 J 0.0020 0.00050 mg/L 08/20/25 07:46 08/23/25 06:49 1 Thallium ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 06:49 1 Uranium 0.030 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 06:49 1 Vanadium 0.015 0.0050 0.0015 mg/L 08/20/25 07:46 08/23/25 06:49 1 Zinc 0.033 0.010 0.0050 mg/L 08/20/25 07:46 08/23/25 06:49 1 Eurofins Denver Page 11 of 28 8/29/2025 Client Sample Results Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Method: EPA 200.8 - Metals (ICP/MS) - Dissolved Client Sample ID: MW-5 Lab Sample ID: 280-212147-4 Date Collected: 08/18/25 04:45 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Silver ND 0.0010 0.00025 mg/L 08/20/25 07:49 08/23/25 06:52 1 Aluminum 3.9 0.10 0.025 mg/L 08/20/25 07:49 08/23/25 06:52 1 Arsenic 0.0023 0.0020 0.00050 mg/L 08/20/25 07:49 08/23/25 06:52 1 Barium 0.097 0.0020 0.00055 mg/L 08/20/25 07:49 08/23/25 06:52 1 Beryllium ND 0.0010 0.00025 mg/L 08/20/25 07:49 08/24/25 22:57 1 Cadmium ND F1 0.0010 0.00025 mg/L 08/20/25 07:49 08/23/25 06:52 1 8 Cobalt 0.0023 F1 0.0010 0.00025 mg/L 08/20/25 07:49 08/24/25 22:57 1 Chromium 0.0032 F1 0.0030 0.0010 mg/L 08/20/25 07:49 08/23/25 06:52 1 Copper 0.011 F1 0.0020 0.0010 mg/L 08/20/25 07:49 08/24/25 22:57 1 Iron 4.1 0.20 0.050 mg/L 08/20/25 07:49 08/24/25 22:57 1 Manganese 0.19 0.0030 0.0015 mg/L 08/20/25 07:49 08/23/25 06:52 1 Molybdenum 0.0057 F1 0.0020 0.00050 mg/L 08/20/25 07:49 08/23/25 06:52 1 Nickel 0.0046 F1 0.0030 0.0010 mg/L 08/20/25 07:49 08/23/25 06:52 1 Lead 0.0044 F1 0.0010 0.00050 mg/L 08/20/25 07:49 08/23/25 06:52 1 Antimony ND F1 0.0020 0.00050 mg/L 08/20/25 07:49 08/23/25 06:52 1 Selenium ND 0.0020 0.00050 mg/L 08/20/25 07:49 08/23/25 06:52 1 Thallium ND F1 0.0010 0.00025 mg/L 08/20/25 07:49 08/23/25 06:52 1 Uranium 0.016 F1 0.0010 0.00025 mg/L 08/20/25 07:49 08/23/25 06:52 1 Vanadium 0.011 F1 0.0050 0.0015 mg/L 08/20/25 07:49 08/23/25 06:52 1 Zinc 0.019 0.010 0.0050 mg/L 08/20/25 07:49 08/23/25 06:52 1 Method: EPA 245.1 - Mercury (CVAA) - Dissolved Client Sample ID: MW-1 Lab Sample ID: 280-212147-1 Date Collected: 08/18/25 05:05 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Oil Fac Mercury ND 0.00020 0.000060 mg/L 08/20/25 08:48 08/21/25 12:07 1 Client Sample ID: MW-2 Lab Sample ID: 280-212147-2 Date Collected: 08/18/25 05:22 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury ND 0.00020 0.000060 mg/L 08/20/25 08:48 08/21/25 12:08 1 Client Sample ID: MW-4 Lab Sample ID: 280-212147-3 Date Collected: 08/18/25 05:45 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Oil Fac Mercury ND 0.00020 0.000060 mg/L 08/20/25 08:48 08/21/25 12:12 1 Client Sample ID: MW-5 Lab Sample ID: 280-212147-4 Date Collected: 08/18/25 04:45 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury ND 0.00020 0.000060 mg/L 08/21/25 13:01 08/21/25 19:25 1 Eurofins Denver Page 12 of 28 8/29/2025 Client Sample Results Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells - NCCI Pit#1 General Chemistry Client Sample ID: MW-1 Lab Sample ID: 280-212147-1 Date Collected: 08/18/25 05:05 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Nitrate Nitrite as N(EPA 353.2) ND 0.20 0.060 mg/L 08/27/25 10:59 1 Total Dissolved Solids(TDS)(SM 1000 20 12 mg/L 08/20/25 09:06 1 2540C) Client Sample ID: MW-2 Lab Sample ID: 280-212147-2 Date Collected: 08/18/25 05:22 Matrix: Water Date Received: 08/19/25 11:35 0 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Nitrate Nitrite as N(EPA 353.2) 1.0 0.20 0.060 mg/L 08/27/25 11:00 1 Total Dissolved Solids(TDS)(SM 1300 20 12 mg/L 08/20/25 09:06 1 2540C) Client Sample ID: MW-4 Lab Sample ID: 280-212147-3 Date Collected: 08/18/25 05:45 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Nitrate Nitrite as N(EPA 353.2) 0.37 0.20 0.060 mg/L 08/27/25 11:01 1 Total Dissolved Solids(TDS)(SM 1200 20 12 mg/L 08/20/25 09:06 1 2540C) Client Sample ID: MW-5 Lab Sample ID: 280-212147-4 Date Collected: 08/18/25 04:45 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Nitrate Nitrite as N(EPA 353.2) ND 0.20 0.060 mg/L 08/27/25 11:14 1 Total Dissolved Solids(TDS)(SM 950 10 6.0 mg/L 08/20/25 09:06 1 2540C) General Chemistry - Dissolved Client Sample ID: MW-1 Lab Sample ID: 280-212147-1 Date Collected: 08/18/25 05:05 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Chloride(EPA 300.0) 140 3.0 1.3 mg/L 08/20/25 23:04 1 Sulfate(EPA 300.0) 310 15 6.5 mg/L 08/20/25 23:18 5 Fluoride(EPA 300.0) 0.86 0.50 0.20 mg/L 08/20/25 23:04 1 Client Sample ID: MW-2 Lab Sample ID: 280-212147-2 Date Collected: 08/18/25 05:22 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Chloride(EPA 300.0) 150 3.0 1.3 mg/L 08/20/25 23:33 1 Sulfate(EPA 300.0) 350 15 6.5 mg/L 08/20/25 23:47 5 Fluoride(EPA 300.0) 1.1 0.50 0.20 mg/L 08/20/25 23:33 1 Client Sample ID: MW-4 Lab Sample ID: 280-212147-3 Date Collected: 08/18/25 05:45 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Chloride(EPA 300.0) 160 3.0 1.3 mg/L 08/21/25 00:01 1 Sulfate(EPA 300.0) 340 15 6.5 mg/L 08/21/25 00:15 5 Eurofins Denver Page 13 of 28 8/29/2025 Client Sample Results Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 General Chemistry - Dissolved (Continued) Client Sample ID: MW-4 Lab Sample ID: 280-212147-3 Date Collected: 08/18/25 05:45 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride(EPA 300.0) 1.2 0.50 0.20 mg/L 08/21/25 00:01 1 Client Sample ID: MW-5 Lab Sample ID: 280-212147-4 Date Collected: 08/18/25 04:45 Matrix: Water Date Received: 08/19/25 11:35 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Q Chloride(EPA 300.0) 140 3.0 1.3 mg/L 08/21/25 00:29 1 v Sulfate(EPA 300.0) 240 15 6.5 mg/L 08/21/25 01:11 5 Fluoride(EPA 300.0) 0.84 0.50 0.20 mg/L 08/21/25 00:29 1 Eurofins Denver Page 14 of 28 8/29/2025 QC Sample Results Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Method: 200.7 Rev 4.4 - Metals (ICP) Lab Sample ID: MB 280-709826/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total Recoverable Analysis Batch: 710320 Prep Batch: 709826 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Di!Fac Boron ND 0.050 0.015 mg/L 08/20/25 07:46 08/21/25 20:03 1 Lithium ND 0.020 0.010 mg/L 08/20/25 07:46 08/21/25 20:03 1 Lab Sample ID: LCS 280-709826/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total Recoverable Analysis Batch: 710320 Prep Batch: 709826 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Boron 2.00 2.07 mg/L 104 85-115 Lithium 1.00 0.996 mg/L 100 85-115 Lab Sample ID: 280-212147-4 MS Client Sample ID: MW-5 Matrix: Water Prep Type: Dissolved Analysis Batch: 710320 Prep Batch: 709826 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Boron 0.24 2.00 2.35 mg/L 105 75-125 Lithium 0.034 1.00 1.03 mg/L 99 75-125 Lab Sample ID: 280-212147-4 MSD Client Sample ID: MW-5 Matrix: Water Prep Type: Dissolved Analysis Batch: 710320 Prep Batch: 709826 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Boron 0.24 2.00 2.37 mg/L 106 75-125 1 20 Lithium 0.034 1.00 1.04 mg/L 100 75-125 1 20 Method: 200.8 - Metals (ICP/MS) Lab Sample ID: MB 280-709826/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total Recoverable Analysis Batch: 710479 Prep Batch: 709826 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Oil Fac Silver ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 05:38 1 Aluminum ND 0.10 0.025 mg/L 08/20/25 07:46 08/23/25 05:38 1 Barium ND 0.0020 0.00055 mg/L 08/20/25 07:46 08/23/25 05:38 1 Beryllium ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 05:38 1 Cadmium ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 05:38 1 Chromium ND 0.0030 0.0010 mg/L 08/20/25 07:46 08/23/25 05:38 1 Manganese ND 0.0030 0.0015 mg/L 08/20/25 07:46 08/23/25 05:38 1 Nickel ND 0.0030 0.0010 mg/L 08/20/25 07:46 08/23/25 05:38 1 Lead ND 0.0010 0.00050 mg/L 08/20/25 07:46 08/23/25 05:38 1 Antimony ND 0.0020 0.00050 mg/L 08/20/25 07:46 08/23/25 05:38 1 Thallium ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 05:38 1 Uranium ND 0.0010 0.00025 mg/L 08/20/25 07:46 08/23/25 05:38 1 Vanadium ND 0.0050 0.0015 mg/L 08/20/25 07:46 08/23/25 05:38 1 Eurofins Denver Page 15 of 28 8/29/2025 QC Sample Results Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Method: 200.8 - Metals (ICP/MS) (Continued) Lab Sample ID: LCS 280-709826/26-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total Recoverable Analysis Batch: 710479 Prep Batch: 709826 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Silver 0.0400 0.0396 mg/L 99 90-114 Aluminum 0.800 0.704 mg/L 88 85-115 Barium 0.0400 0.0370 mg/L 92 89-115 Beryllium 0.0400 0.0372 mg/L 93 85-115 Cadmium 0.0400 0.0359 mg/L 90 89-111 Chromium 0.0400 0.0364 mg/L 91 86-115 Manganese 0.0400 0.0360 mg/L 90 87-115 9 Nickel 0.0400 0.0369 mg/L 92 86-115 Lead 0.0400 0.0365 mg/L 91 88-115 Antimony 0.0400 0.0361 mg/L 90 85-115 Thallium 0.0400 0.0368 mg/L 92 86-115 Uranium 0.0400 0.0376 mg/L 94 85-115 Vanadium 0.0400 0.0383 mg/L 96 90-115 Lab Sample ID: 280-212147-4 MS Client Sample ID: MW-5 Matrix: Water Prep Type: Dissolved Analysis Batch: 710479 Prep Batch: 709826 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Silver ND 0.0400 0.0418 mg/L 104 70-130 Aluminum 3.9 0.800 5.54 4 mg/L 203 85-115 Arsenic 0.0023 0.0400 0.0394 mg/L 93 79-120 Barium 0.097 0.0400 0.137 mg/L 99 89-115 Cadmium ND F1 0.0400 0.0376 mg/L 94 89-111 Chromium 0.0032 F1 0.0400 0.0406 mg/L 93 86-115 Manganese 0.19 0.0400 0.227 4 mg/L 103 87-115 Molybdenum 0.0057 F1 0.0400 0.0446 mg/L 97 89-112 Nickel 0.0046 F1 0.0400 0.0409 mg/L 91 86-115 Lead 0.0044 F1 0.0400 0.0405 mg/L 90 88-115 Antimony ND F1 0.0400 0.0364 mg/L 91 85-115 Selenium ND 0.0400 0.0386 mg/L 96 85-114 Thallium ND F1 0.0400 0.0363 mg/L 91 86-115 Uranium 0.016 F1 0.0400 0.0537 mg/L 95 85-115 Vanadium 0.011 F1 0.0400 0.0468 F1 mg/L 89 90-115 Zinc 0.019 0.0400 0.0566 mg/L 94 88-115 Lab Sample ID: 280-212147-4 MS Client Sample ID: MW-5 Matrix: Water Prep Type: Dissolved Analysis Batch: 710494 Prep Batch: 709826 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Beryllium ND 0.0400 0.0361 mg/L 90 85-115 Cobalt 0.0023 F1 0.0400 0.0367 F1 mg/L 86 92-115 Copper 0.011 F1 0.0400 0.0447 F1 mg/L 84 90-115 Iron 4.1 0.800 5.32 4 mg/L 150 85-115 Eurofins Denver Page 16 of 28 8/29/2025 QC Sample Results Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Method: 200.8 - Metals (ICP/MS) (Continued) Lab Sample ID: 280-212147-4 MSD Client Sample ID: MW-5 Matrix: Water Prep Type: Dissolved Analysis Batch: 710479 Prep Batch: 709826 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Silver ND 0.0400 0.0396 mg/L 99 70-130 5 20 Aluminum 3.9 0.800 5.66 4 mg/L 218 85-115 2 20 Arsenic 0.0023 0.0400 0.0354 mg/L 83 79_120 11 20 Barium 0.097 0.0400 0.138 mg/L 103 89-115 1 20 Cadmium ND F1 0.0400 0.0342 F1 mg/L 85 89-111 10 20 Chromium 0.0032 F1 0.0400 0.0368 F1 mg/L 84 86-115 10 20 Manganese 0.19 0.0400 0.216 4 mg/L 76 87-115 5 20 9 Molybdenum 0.0057 F1 0.0400 0.0406 F1 mg/L 87 89-112 9 20 Nickel 0.0046 F1 0.0400 0.0378 F1 mg/L 83 86-115 8 20 Lead 0.0044 F1 0.0400 0.0369 F1 mg/L 81 88-115 9 20 Antimony ND F1 0.0400 0.0333 F1 mg/L 83 85-115 9 20 Selenium ND 0.0400 0.0371 mg/L 93 85-114 4 20 Thallium ND F1 0.0400 0.0333 F1 mg/L 83 86-115 9 20 Uranium 0.016 F1 0.0400 0.0493 F1 mg/L 84 85-115 9 20 Vanadium 0.011 F1 0.0400 0.0427 F1 mg/L 79 90-115 9 20 Zinc 0.019 0.0400 0.0547 mg/L 89 88-115 3 20 Lab Sample ID: 280-212147-4 MSD Client Sample ID: MW-5 Matrix: Water Prep Type: Dissolved Analysis Batch: 710494 Prep Batch: 709826 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Beryllium ND 0.0400 0.0401 mg/L 100 85-115 10 20 Cobalt 0.0023 F1 0.0400 0.0376 F1 mg/L 88 92-115 3 20 Copper 0.011 F1 0.0400 0.0479 mg/L 92 90-115 7 20 Iron 4.1 0.800 6.35 4 mg/L 278 85-115 18 20 Method: 245.1 - Mercury (CVAA) Lab Sample ID: MB 280-709846/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 710156 Prep Batch: 709846 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Oil Fac Mercury ND 0.00020 0.000060 mg/L 08/20/25 08:48 08/21/25 11:31 1 Lab Sample ID: LCS 280-709846/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 710156 Prep Batch: 709846 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Mercury 0.00500 0.00511 mg/L 102 85-115 Lab Sample ID: MB 280-710144/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 710367 Prep Batch: 710144 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury ND 0.00020 0.000060 mg/L 08/21/25 13:01 08/21/25 19:15 1 Eurofins Denver Page 17 of 28 8/29/2025 QC Sample Results Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Method: 245.1 - Mercury (CVAA) (Continued) Lab Sample ID: LCS 280-710144/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 710367 Prep Batch: 710144 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Mercury 0.00500 0.00465 mg/L 93 85-115 Method: 300.0 - Anions, Ion Chromatography Lab Sample ID: MB 280-709941/6 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 709941 MB MB 9 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Chloride ND 3.0 1.3 mg/L 08/20/25 15:06 1 Sulfate ND 3.0 1.3 mg/L 08/20/25 15:06 1 Fluoride ND 0.50 0.20 mg/L 08/20/25 15:06 1 Lab Sample ID: LCS 280-709941/4 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 709941 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Chloride 100 101 mg/L 101 90-110 Sulfate 100 101 mg/L 101 90-110 Fluoride 5.00 4.90 mg/L 98 90-110 Lab Sample ID: LCSD 280-709941/5 Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 709941 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Chloride 100 101 mg/L 101 90-110 0 10 Sulfate 100 101 mg/L 101 90-110 0 10 Fluoride 5.00 4.89 mg/L 98 90-110 0 10 Lab Sample ID: MRL 280-709941/3 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 709941 Spike MRL MRL %Rec Analyte Added Result Qualifier Unit D %Rec Limits Chloride 3.00 3.00 mg/L 100 50-150 Sulfate 3.00 2.90 J mg/L 97 50-150 Fluoride 0.500 0.468 J mg/L 94 50-150 Method: 353.2 - Nitrogen, Nitrate-Nitrite Lab Sample ID: MB 280-711066/20 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 711066 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Nitrate Nitrite as N ND 0.20 0.060 mg/L 08/27/25 10:21 1 Eurofins Denver Page 18 of 28 8/29/2025 QC Sample Results Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Method: 353.2 - Nitrogen, Nitrate-Nitrite (Continued) Lab Sample ID: MB 280-711066/59 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 711066 MB MB I_ Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Nitrate Nitrite as N ND 0.20 0.060 mg/L 08/27/25 11:10 1 Lab Sample ID: LCS 280-711066/21 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 711066 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Nitrate Nitrite as N 1.00 1.01 mg/L 101 90-110 Lab Sample ID: LCS 280-711066/60 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 711066 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Nitrate Nitrite as N 1.00 1.02 mg/L 102 90-110 Lab Sample ID: LCSD 280-711066/22 Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 711066 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Nitrate Nitrite as N 1.00 1.00 mg/L 100 90-110 0 10 Lab Sample ID: LCSD 280-711066/61 Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 711066 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Nitrate Nitrite as N 1.00 1.02 mg/L 102 90-110 0 10 Lab Sample ID: 280-212147-4 MS Client Sample ID: MW-5 Matrix: Water Prep Type: Total/NA Analysis Batch: 711066 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Nitrate Nitrite as N ND 2.00 1.87 mg/L 93 90-110 Lab Sample ID: 280-212147-4 MSD Client Sample ID: MW-5 Matrix: Water Prep Type: Total/NA Analysis Batch: 711066 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Nitrate Nitrite as N ND 2.00 1.89 mg/L 94 90-110 1 10 Eurofins Denver Page 19 of 28 8/29/2025 QC Sample Results Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Method: SM 2540C - Solids, Total Dissolved (TDS) Lab Sample ID: MB 280-709860/1 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 709860 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Total Dissolved Solids(TDS) ND 10 6.0 mg/L 08/20/25 09:06 1 Lab Sample ID: LCS 280-709860/2 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 709860 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Total Dissolved Solids(TDS) 501 506 mg/L 101 88-114 Lab Sample ID: 280-212147-1 DU Client Sample ID: MW-1 Matrix: Water Prep Type: Total/NA Analysis Batch: 709860 Sample Sample DU DU RPD Analyte Result Qualifier Result Qualifier Unit D RPD Limit Total Dissolved Solids(TDS) 1000 1020 mg/L 0.2 10 Eurofins Denver Page 20 of 28 8/29/2025 QC Association Summary Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Metals Prep Batch: 709826 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-212147-1 MW-1 Dissolved Water 200.7 280-212147-2 MW-2 Dissolved Water 200.7 280-212147-3 MW-4 Dissolved Water 200.7 280-212147-4 MW-5 Dissolved Water 200.7 280-212147-4 MW-5 Dissolved Water 200.7 MB 280-709826/1-A Method Blank Total Recoverable Water 200.7 LCS 280-709826/26-A Lab Control Sample Total Recoverable Water 200.7 LCS 280-709826/2-A Lab Control Sample Total Recoverable Water 200.7 280-212147-4 MS MW-5 Dissolved Water 200.7 280-212147-4 MS MW-5 Dissolved Water 200.7 280-212147-4 MSD MW-5 Dissolved Water 200.7 280-212147-4 MSD MW-5 Dissolved Water 200.7 Prep Batch: 709846 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-212147-1 MW-1 Dissolved Water 245.1 280-212147-2 MW-2 Dissolved Water 245.1 280-212147-3 MW-4 Dissolved Water 245.1 MB 280-709846/1-A Method Blank Total/NA Water 245.1 LCS 280-709846/2-A Lab Control Sample Total/NA Water 245.1 Prep Batch: 710144 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-212147-4 MW-5 Dissolved Water 245.1 MB 280-710144/1-A Method Blank Total/NA Water 245.1 LCS 280-710144/2-A Lab Control Sample Total/NA Water 245.1 Analysis Batch: 710156 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-212147-1 MW-1 Dissolved Water 245.1 709846 280-212147-2 MW-2 Dissolved Water 245.1 709846 280-212147-3 MW-4 Dissolved Water 245.1 709846 MB 280-709846/1-A Method Blank Total/NA Water 245.1 709846 LCS 280-709846/2-A Lab Control Sample Total/NA Water 245.1 709846 Analysis Batch: 710320 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-212147-1 MW-1 Dissolved Water 200.7 Rev 4.4 709826 280-212147-2 MW-2 Dissolved Water 200.7 Rev 4.4 709826 280-212147-3 MW-4 Dissolved Water 200.7 Rev 4.4 709826 280-212147-4 MW-5 Dissolved Water 200.7 Rev 4.4 709826 MB 280-709826/1-A Method Blank Total Recoverable Water 200.7 Rev 4.4 709826 LCS 280-709826/2-A Lab Control Sample Total Recoverable Water 200.7 Rev 4.4 709826 280-212147-4 MS MW-5 Dissolved Water 200.7 Rev 4.4 709826 280-212147-4 MSD MW-5 Dissolved Water 200.7 Rev 4.4 709826 Analysis Batch: 710367 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-212147-4 MW-5 Dissolved Water 245.1 710144 MB 280-710144/1-A Method Blank Total/NA Water 245.1 710144 LCS 280-710144/2-A Lab Control Sample Total/NA Water 245.1 710144 Eurofins Denver Page 21 of 28 8/29/2025 QC Association Summary Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Metals Analysis Batch: 710479 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-212147-1 MW-1 Dissolved Water 200.8 709826 280-212147-2 MW-2 Dissolved Water 200.8 709826 280-212147-3 MW-4 Dissolved Water 200.8 709826 280-212147-4 MW-5 Dissolved Water 200.8 709826 MB 280-709826/1-A Method Blank Total Recoverable Water 200.8 709826 LCS 280-709826/26-A Lab Control Sample Total Recoverable Water 200.8 709826 280-212147-4 MS MW-5 Dissolved Water 200.8 709826 280-212147-4 MSD MW-5 Dissolved Water 200.8 709826 Analysis Batch: 710494 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-212147-1 MW-1 Dissolved Water 200.8 709826 280-212147-2 MW-2 Dissolved Water 200.8 709826 280-212147-3 MW-4 Dissolved Water 200.8 709826 280-212147-4 MW-5 Dissolved Water 200.8 709826 280-212147-4 MS MW-5 Dissolved Water 200.8 709826 280-212147-4 MSD MW-5 Dissolved Water 200.8 709826 General Chemistry Analysis Batch: 709860 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-212147-1 MW-1 Total/NA Water SM 2540C 280-212147-2 MW-2 Total/NA Water SM 2540C 280-212147-3 MW-4 Total/NA Water SM 2540C 280-212147-4 MW-5 Total/NA Water SM 2540C MB 280-709860/1 Method Blank Total/NA Water SM 2540C LCS 280-709860/2 Lab Control Sample Total/NA Water SM 2540C 280-212147-1 DU MW-1 Total/NA Water SM 2540C Analysis Batch: 709941 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-212147-1 MW-1 Dissolved Water 300.0 280-212147-1 MW-1 Dissolved Water 300.0 280-212147-2 MW-2 Dissolved Water 300.0 280-212147-2 MW-2 Dissolved Water 300.0 280-212147-3 MW-4 Dissolved Water 300.0 280-212147-3 MW-4 Dissolved Water 300.0 280-212147-4 MW-5 Dissolved Water 300.0 280-212147-4 MW-5 Dissolved Water 300.0 MB 280-709941/6 Method Blank Total/NA Water 300.0 LCS 280-709941/4 Lab Control Sample Total/NA Water 300.0 LCSD 280-709941/5 Lab Control Sample Dup Total/NA Water 300.0 MRL 280-709941/3 Lab Control Sample Total/NA Water 300.0 Analysis Batch: 711066 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-212147-1 MW-1 Total/NA Water 353.2 280-212147-2 MW-2 Total/NA Water 353.2 280-212147-3 MW-4 Total/NA Water 353.2 280-212147-4 MW-5 Total/NA Water 353.2 Eurofins Denver Page 22 of 28 8/29/2025 QC Association Summary Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 General Chemistry (Continued) Analysis Batch: 711066 (Continued) Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch MB 280-711066/20 Method Blank Total/NA Water 353.2 MB 280-711066/59 Method Blank Total/NA Water 353.2 LCS 280-711066/21 Lab Control Sample Total/NA Water 353.2 LCS 280-711066/60 Lab Control Sample Total/NA Water 353.2 LCSD 280-711066/22 Lab Control Sample Dup Total/NA Water 353.2 LCSD 280-711066/61 Lab Control Sample Dup Total/NA Water 353.2 280-212147-4 MS MW-5 Total/NA Water 353.2 280-212147-4 MSD MW-5 Total/NA Water 353.2 10 Eurofins Denver Page 23 of 28 8/29/2025 Lab Chronicle Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Client Sample ID: MW-1 Lab Sample ID: 280-212147-1 Date Collected: 08/18/25 05:05 Matrix: Water Date Received: 08/19/25 11:35 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Dissolved Prep 200.7 50 mL 50 mL 709826 08/20/25 07:46 AR EET DEN Dissolved Analysis 200.7 Rev 4.4 1 710320 08/21/25 22:10 ADL EET DEN Dissolved Prep 200.7 50 mL 50 mL 709826 08/20/25 07:46 AR EET DEN Dissolved Analysis 200.8 1 710479 08/23/25 06:43 LMT EET DEN Dissolved Prep 200.7 50 mL 50 mL 709826 08/20/25 07:46 AR EET DEN Dissolved Analysis 200.8 1 710494 08/24/25 22:49 LMT EET DEN Dissolved Prep 245.1 30 mL 50 mL 709846 08/20/25 08:48 AES EET DEN Dissolved Analysis 245.1 1 710156 08/21/25 12:07 AES EET DEN Dissolved Analysis 300.0 1 10 mL 10 mL 709941 08/20/25 23:04 SLH EET DEN Dissolved Analysis 300.0 5 10 mL 10 mL 709941 08/20/25 23:18 SLH EET DEN Total/NA Analysis 353.2 1 100 mL 100 mL 711066 08/27/25 10:59 AKF EET DEN Total/NA Analysis SM 2540C 1 50 mL 100 mL 709860 08/20/25 09:06 YBF EET DEN Client Sample ID: MW-2 Lab Sample ID: 280-212147-2 Date Collected: 08/18/25 05:22 Matrix: Water Date Received: 08/19/25 11:35 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Dissolved Prep 200.7 50 mL 50 mL 709826 08/20/25 07:46 AR EET DEN Dissolved Analysis 200.7 Rev 4.4 1 710320 08/21/25 22:14 ADL EET DEN Dissolved Prep 200.7 50 mL 50 mL 709826 08/20/25 07:46 AR EET DEN Dissolved Analysis 200.8 1 710479 08/23/25 06:46 LMT EET DEN Dissolved Prep 200.7 50 mL 50 mL 709826 08/20/25 07:46 AR EET DEN Dissolved Analysis 200.8 1 710494 08/24/25 22:51 LMT EET DEN Dissolved Prep 245.1 30 mL 50 mL 709846 08/20/25 08:48 AES EET DEN Dissolved Analysis 245.1 1 710156 08/21/25 12:08 AES EET DEN Dissolved Analysis 300.0 1 10 mL 10 mL 709941 08/20/25 23:33 SLH EET DEN Dissolved Analysis 300.0 5 10 mL 10 mL 709941 08/20/25 23:47 SLH EET DEN Total/NA Analysis 353.2 1 100 mL 100 mL 711066 08/27/25 11:00 AKF EET DEN Total/NA Analysis SM 2540C 1 50 mL 100 mL 709860 08/20/25 09:06 YBF EET DEN Client Sample ID: MW-4 Lab Sample ID: 280-212147-3 Date Collected: 08/18/25 05:45 Matrix: Water Date Received: 08/19/25 11:35 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Dissolved Prep 200.7 50 mL 50 mL 709826 08/20/25 07:46 AR EET DEN Dissolved Analysis 200.7 Rev 4.4 1 710320 08/21/25 22:18 ADL EET DEN Dissolved Prep 200.7 50 mL 50 mL 709826 08/20/25 07:46 AR EET DEN Dissolved Analysis 200.8 1 710479 08/23/25 06:49 LMT EET DEN Dissolved Prep 200.7 50 mL 50 mL 709826 08/20/25 07:46 AR EET DEN Dissolved Analysis 200.8 1 710494 08/24/25 22:54 LMT EET DEN Dissolved Prep 245.1 30 mL 50 mL 709846 08/20/25 08:48 AES EET DEN Dissolved Analysis 245.1 1 710156 08/21/25 12:12 AES EET DEN Eurofins Denver Page 24 of 28 8/29/2025 Lab Chronicle Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Client Sample ID: MW-4 Lab Sample ID: 280-212147-3 Date Collected: 08/18/25 05:45 Matrix: Water Date Received: 08/19/25 11:35 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Dissolved Analysis 300.0 1 10 mL 10 mL 709941 08/21/25 00:01 SLH EET DEN Dissolved Analysis 300.0 5 10 mL 10 mL 709941 08/21/25 00:15 SLH EET DEN Total/NA Analysis 353.2 1 100 mL 100 mL 711066 08/27/25 11:01 AKF EET DEN Total/NA Analysis SM 2540C 1 50 mL 100 mL 709860 08/20/25 09:06 YBF EET DEN Client Sample ID: MW-5 Lab Sample ID: 280-212147-4 Date Collected: 08/18/25 04:45 Matrix: Water Date Received: 08/19/25 11:35 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Dissolved Prep 200.7 50 mL 50 mL 709826 08/20/25 07:49 AR EET DEN Dissolved Analysis 200.7 Rev 4.4 1 710320 08/21/25 22:23 ADL EET DEN Dissolved Prep 200.7 50 mL 50 mL 709826 08/20/25 07:49 AR EET DEN Dissolved Analysis 200.8 1 710479 08/23/25 06:52 LMT EET DEN Dissolved Prep 200.7 50 mL 50 mL 709826 08/20/25 07:49 AR EET DEN Dissolved Analysis 200.8 1 710494 08/24/25 22:57 LMT EET DEN Dissolved Prep 245.1 30 mL 50 mL 710144 08/21/25 13:01 CAF EET DEN Dissolved Analysis 245.1 1 710367 08/21/25 19:25 CAF EET DEN Dissolved Analysis 300.0 1 10 mL 10 mL 709941 08/21/25 00:29 SLH EET DEN Dissolved Analysis 300.0 5 10 mL 10 mL 709941 08/21/25 01:11 SLH EET DEN Total/NA Analysis 353.2 1 100 mL 100 mL 711066 08/27/25 11:14 AKF EET DEN Total/NA Analysis SM 2540C 1 100 mL 100 mL 709860 08/20/25 09:06 YBF EET DEN Laboratory References: EET DEN=Eurofins Denver,4955 Yarrow Street,Arvada,CO 80002,TEL(303)736-0100 Eurofins Denver Page 25 of 28 8/29/2025 Accreditation/Certification Summary Client: J&T Consulting, Inc. Job ID: 280-212147-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 Laboratory: Eurofins Denver All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Authority Program Identification Number Expiration Date A2LA Dept.of Defense ELAP 2907.01 10-31-26 A2LA ISO/IEC 17025 2907.01 10-31-26 Alabama State Program 40730 09-30-12" Alaska(UST) State 18-001 11-30-25 Arizona State AZ0713 12-20-25 Arkansas DEQ State 88-00687 04-02-26 California State 2513 01-08-26 Colorado Petroleum Storage Tank Program 2907.01 (A2LA) 10-31-26 Colorado State CO00026 06-30-26 Connecticut State PH-0686 09-30-26 Florida NELAP E87667 06-30-26 Georgia State 4025 01-08-26 Illinois NELAP 200017 05-31-26 Iowa State 370 12-01-26 Kansas NELAP E-10166 04-30-26 Kentucky(WW) State KY98047 12-31-25 Louisiana NELAP 30785 06-30-14* Louisiana(All) NELAP 30785 06-30-26 Minnesota NELAP 1788752 12-31-25 Montana(DW) State CERT0117 01-01-26 Nevada State CO00026 07-31-26 New Hampshire NELAP 2053 04-28-26 New Jersey NELAP CO004 06-30-26 New York NELAP 11964 04-01-26 North Dakota State R-034 07-25-25" Oklahoma NELAP 8614 08-31-25 Oregon NELAP 4025 01-08-26 Pennsylvania NELAP 68-00664 07-31-26 South Carolina State 72002001 01-18-26 Texas NELAP TX104704183-08-TX 09-30-09" Texas NELAP T104704183 09-30-25 US Fish&Wildlife US Federal Programs 058448 07-31-26 USDA US Federal Programs P330-20-00065 12-19-25 Utah NELAP QUANS 06-30-13" Utah NELAP CO00026 07-31-25" Virginia NELAP 460232 06-14-26 Washington State C583 08-03-26 West Virginia DEP State 354 11-30-25 Wisconsin State 999615430 08-31-26 Wyoming(UST) A2LA 2907.01 06-09-26 "Accreditation/Certification renewal pending-accreditation/certification considered valid. Eurofins Denver Page 26 of 28 8/29/2025 1 a 0 -) o c a z - par of 8 ml 0a° c inO O n V O �y� E En uj N0 L • E U U U ,,,,,44. > c14v o a To Q c 1 s 4•- "o 0 o w NO, —_ cz cIOO = z •.. j •. UaaZ _ O ` O.:^ U ad ° 0•z et a C D .L Slewa = ~a s • F` LC r- - — .. U f,¢ (Vit .,,,,i v y " q N 10 c Pam— CD CO E E 6C n ° a S m E z N -- m m o o o N o ., J `o C C o ) a,) a" ° I y N Q1 1) °- N N U CO7tr In y m ' ._ a`( memid • } XXXX e — Oy cp 5 E p Pa!d) a7eilns'9 apuon!d•apuol4J Pan!oss!0•O9 O'OOE E Q cm oT Mca 0to (Palaud Plad 6)nmayppanloss!a•I.94Z U o a CQ (Palail!d Plad)s!eaW OZ POn!osSIQ-900Z 5.L X X X X ( d-�.c O r. Rf U O 'm 5 (paiai!!d Pla!d) wn!47!l 8 uo.og Pan!oss!Q-L'OOZ X X X X O !°2 U n w - - c t a 0 a E �,�,� d aluAN-aie�i!N'WBOli1N•said Z'E9E '0? X X X X Cr*. ? c o o o T13 CI CC om` Q) ' m (sal)sp!!os Pan!oss!a Igol-Pole3 3049Z;Z X X X X E E .IP. CZ -2 CC CC CC U ° - / In CL 0 m _ = , � k,,'va(ONJOset'eldweSP."iI PI44� 41;011 P'J N N N G.044 U ao o a ,, 0 a 41', J N V' 0 kit �ii E E t T a Nam : ' o °1 0- hh IflO t c a oa r( ( ity o 141 400 `c c a) a z L (h• EF /p 01 — j O N co O E _ 1 c a m m E - 5 c d w Q k m - ," 0 U CD o O cn 8 3 .N o *0-El 2 _c W^ m > _ °, o, c - D m ,� o C N ° c C p C d 2 O 6 - -C c F 7 Q U L -° O. N Z C C d C o 0 o 5 m o ° a) 2 '.- 2 2 m or v v `m vo o c ,o dz l-:, m N 0 U o "U o. aiJ RI m cm U. t a H d Q C oa -} n E 3 `n Z L •— m( E �- 'n -' m O o g .� O a m U 0 -A. O N E , .� U W v Q a Oc5 8- a2 i 2 inU a` 'o w.0 aO v)Z rn _ 2 2 2 a- a W cc a a Page 27 of 28 8/29/2025 Login Sample Receipt Checklist Client: J&T Consulting, Inc. Job Number: 280-212147-1 Login Number: 212147 List Source: Eurofins Denver List Number: 1 Creator: Roehsner, Karen P Question Answer Comment Radioactivity wasn't checked or is</= background as measured by a survey True meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time(excluding tests with immediate True 4 HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. N/A There is sufficient vol.for all requested analyses, incl.any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is N/A <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins Denver Page 28 of 28 8/29/2025 tiff eurofins O Environment Testing ANALYTICAL REPORT PREPARED FOR Attn: J.C. York J&T Consulting, Inc. 305 Denver Avenue, Suite D Fort Lupton, Colorado 80621 Generated 11/5/2025 12:32:03 PM JOB DESCRIPTION Quarterly Monitoring Wells - NCCI Pit #1 - Expan JOB NUMBER 280-215989-1 Eurofins Denver 4955 Yarrow Street Arvada CO 80002 c , m 1of26 ° O EYOL See page two for job notes and contact information. Page 0'00 Eurofins Denver 0 Job Notes This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written approval of the laboratory. All questions should be directed to the Eurofins TestAmerica Project Manager. Authorization I - Generated 11/5/2025 12:32:03 PM Authorized for release by Shelby McCabe, Project Manager I Shelby.McCabe@et.eurofinsus.com (303)736-0165 Eurofins Denver is a laboratory within TestAmerica Laboratories,Inc.,a company within Eurofins Environment Testing Group of Companies Page 2 of 26 11/5/2025 Client: J&T Consulting, Inc. Laboratory Job ID:280-215989-1 Project/Site: Quarterly Monitoring Wells-NCCI Pit#1 -Expan Table of Contents Cover Page 1 Table of Contents 3 Definitions 4 Case Narrative 5 Detection Summary 6 Method Summary 8 Sample Summary 9 Client Sample Results 10 QC Sample Results 15 QC Association 20 Chronicle 22 Certification Summary 24 Chain of Custody 25 Receipt Checklists 26 Eurofins Denver Page 3 of 26 11/5/2025 Definitions/Glossary Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Qualifiers Metals Qualifier Qualifier Description ^+ Continuing Calibration Verification(CCV)is outside acceptance limits,high biased. J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. Glossary Abbreviation These commonly used abbreviations may or may not be present in this report. Listed under the"D"column to designate that the result is reported on a dry weight basis %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio(normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit(DoD/DOE) DL,RA,RE,IN Indicates a Dilution,Re-analysis,Re-extraction,or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration(Radiochemistry) EDL Estimated Detection Limit(Dioxin) LOD Limit of Detection(DoD/DOE) LOQ Limit of Quantitation(DoD/DOE) MCL EPA recommended"Maximum Contaminant Level" MDA Minimum Detectable Activity(Radiochemistry) MDC Minimum Detectable Concentration(Radiochemistry) MDL Method Detection Limit ML Minimum Level(Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit(or MDL or EDL if shown) NEG Negative/Absent POS Positive/Present PQL Practical Quantitation Limit PRES Presumptive QC Quality Control RER Relative Error Ratio(Radiochemistry) RL Reporting Limit or Requested Limit(Radiochemistry) RPD Relative Percent Difference,a measure of the relative difference between two points TEF Toxicity Equivalent Factor(Dioxin) TEQ Toxicity Equivalent Quotient(Dioxin) TNTC Too Numerous To Count Eurofins Denver Page 4 of 26 11/5/2025 Case Narrative Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Job ID: 280-215989-1 Eurofins Denver Job Narrative 280-215989-1 4 The analytical test results presented in this report meet all requirements of the associated regulatory program listed on the Accreditation/Certification Summary Page, unless otherwise noted. Data qualifiers and/or narrative comments are included to explain any exceptions, if applicable. Regulated compliance samples(e.g. SDWA, NPDES)must comply with associated agency requirements/permits. • Matrix-specific batch QC(e.g., MS, MSD, SD)may not be reported when insufficient sample volume is available or when site- specific QC samples are not submitted. In such cases, a Laboratory Control Sample Duplicate(LCSD)may be analyzed to provide precision data for the batch. • For samples analyzed using surrogate and/or isotope dilution analytes,any recoveries falling outside of established acceptance criteria are re-prepared and/or re-analyzed to confirm results, unless the deviation is due to sample dilution or otherwise explained in the case narrative. Receipt The samples were received on 10/28/2025 11:09 AM. Unless otherwise noted below,the samples arrived in good condition,and, where required, properly preserved and on ice. The temperature of the cooler at receipt time was 0.1°C. Method 200.7 Rev 4.4-Metals(ICP)-Dissolved Samples MW-1 (280-215989-1), MW-2(280-215989-2), MW-4(280-215989-3)and MW-5(280-215989-4)were analyzed for Metals(ICP)-Dissolved. The samples were prepared on 10/29/2025 and analyzed on 10/30/2025. Method 200.8-Metals(ICP/MS)-Dissolved Samples MW-1 (280-215989-1), MW-2(280-215989-2), MW-4(280-215989-3)and MW-5(280-215989-4)were analyzed for Metals(ICP/MS)-Dissolved. The samples were prepared on 10/29/2025 and analyzed on 10/30/2025. The continuing calibration verification (CCV)associated with batch 280-720511 recovered above the upper control limit for Iron. The samples associated with this CCV were non-detects for the affected analyte;therefore,the data have been reported. Associated samples: MW-1 (280-215989-1), MW-2(280-215989-2), MW-4(280-215989-3), MW-5(280-215989-4)and (CCV 280-720511/51). Method 245.1 -Mercury(CVAA)-Dissolved Samples MW-1 (280-215989-1), MW-2(280-215989-2), MW-4(280-215989-3)and MW-5(280-215989-4)were analyzed for Mercury(CVAA)-Dissolved. The samples were prepared on 10/29/2025 and analyzed on 10/30/2025. Method SM 2540C-Solids,Total Dissolved (TDS) Samples MW-1 (280-215989-1), MW-2(280-215989-2), MW-4(280-215989-3)and MW-5(280-215989-4)were analyzed for Solids, Total Dissolved (TDS). The samples were analyzed on 10/30/2025. Method 300.0-Anions, Ion Chromatography-Dissolved Samples MW-1 (280-215989-1), MW-2(280-215989-2), MW-4(280-215989-3)and MW-5(280-215989-4)were analyzed for Anions, Ion Chromatography-Dissolved. The samples were analyzed on 10/30/2025 and 10/31/2025. Samples MW-1 (280-215989-1)[5x], MW-2(280-215989-2)[5x], MW-4(280-215989-3)[5x]and MW-5(280-215989-4)[5x] required dilution prior to analysis. The reporting limits have been adjusted accordingly. Method 353.2-Nitrogen, Nitrate-Nitrite Samples MW-1 (280-215989-1), MW-2(280-215989-2), MW-4(280-215989-3)and MW-5(280-215989-4)were analyzed for Nitrogen, Nitrate-Nitrite. The samples were analyzed on 10/30/2025. Eurofins Denver Page 5 of 26 11/5/2025 Detection Summary Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Client Sample ID: MW-1 Lab Sample ID: 280-215989-1 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Boron 0.28 0.050 0.015 mg/L 1 200.7 Rev 4.4 Dissolved Lithium 0.045 0.020 0.010 mg/L 1 200.7 Rev 4.4 Dissolved Arsenic 0.0021 0.0020 0.00050 mg/L 1 200.8 Dissolved Barium 0.099 0.0020 0.00055 mg/L 1 200.8 Dissolved Cadmium 0.00035 J 0.0010 0.00025 mg/L 1 200.8 Dissolved Cobalt 0.0033 0.0010 0.00025 mg/L 1 200.8 Dissolved Copper 0.0061 0.0020 0.0010 mg/L 1 200.8 Dissolved Manganese 1.8 0.0030 0.0015 mg/L 1 200.8 Dissolved Molybdenum 0.0061 0.0020 0.00050 mg/L 1 200.8 Dissolved Nickel 0.0058 0.0030 0.0010 mg/L 1 200.8 Dissolved Uranium 0.017 0.0010 0.00025 mg/L 1 200.8 Dissolved Vanadium 0.0019 J 0.0050 0.0015 mg/L 1 200.8 Dissolved Total Dissolved Solids(TDS) 1000 20 12 mg/L 1 SM 2540C Total/NA Chloride 150 3.0 1.3 mg/L 1 300.0 Dissolved Sulfate 330 15 6.5 mg/L 5 300.0 Dissolved Fluoride 1.1 0.50 0.20 mg/L 1 300.0 Dissolved Client Sample ID: MW-2 Lab Sample ID: 280-215989-2 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Boron 0.26 0.050 0.015 mg/L 1 200.7 Rev 4.4 Dissolved Lithium 0.034 0.020 0.010 mg/L 1 200.7 Rev 4.4 Dissolved Arsenic 0.00062 J 0.0020 0.00050 mg/L 1 200.8 Dissolved Barium 0.083 0.0020 0.00055 mg/L 1 200.8 Dissolved Cobalt 0.00064 J 0.0010 0.00025 mg/L 1 200.8 Dissolved Copper 0.0013 J 0.0020 0.0010 mg/L 1 200.8 Dissolved Manganese 0.028 0.0030 0.0015 mg/L 1 200.8 Dissolved Molybdenum 0.0021 0.0020 0.00050 mg/L 1 200.8 Dissolved Nickel 0.0020 J 0.0030 0.0010 mg/L 1 200.8 Dissolved Selenium 0.0058 0.0020 0.00050 mg/L 1 200.8 Dissolved Uranium 0.026 0.0010 0.00025 mg/L 1 200.8 Dissolved Nitrate Nitrite as N 0.86 0.20 0.060 mg/L 1 353.2 Total/NA Total Dissolved Solids(TDS) 1000 20 12 mg/L 1 SM 2540C Total/NA Chloride 150 3.0 1.3 mg/L 1 300.0 Dissolved Sulfate 350 15 6.5 mg/L 5 300.0 Dissolved Fluoride 1.3 0.50 0.20 mg/L 1 300.0 Dissolved Client Sample ID: MW-4 Lab Sample ID: 280-215989-3 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Boron 0.27 0.050 0.015 mg/L 1 200.7 Rev 4.4 Dissolved Lithium 0.038 0.020 0.010 mg/L 1 200.7 Rev 4.4 Dissolved Arsenic 0.00084 J 0.0020 0.00050 mg/L 1 200.8 Dissolved Barium 0.080 0.0020 0.00055 mg/L 1 200.8 Dissolved Cobalt 0.0016 0.0010 0.00025 mg/L 1 200.8 Dissolved Copper 0.0028 0.0020 0.0010 mg/L 1 200.8 Dissolved Manganese 0.59 0.0030 0.0015 mg/L 1 200.8 Dissolved Molybdenum 0.0092 0.0020 0.00050 mg/L 1 200.8 Dissolved Nickel 0.0033 0.0030 0.0010 mg/L 1 200.8 Dissolved Selenium 0.0014 J 0.0020 0.00050 mg/L 1 200.8 Dissolved Uranium 0.026 0.0010 0.00025 mg/L 1 200.8 Dissolved Nitrate Nitrite as N 0.44 0.20 0.060 mg/L 1 353.2 Total/NA This Detection Summary does not include radiochemical test results. Eurofins Denver Page 6 of 26 11/5/2025 Detection Summary Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Client Sample ID: MW-4 (Continued) Lab Sample ID: 280-215989-3 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Total Dissolved Solids(TDS) 990 20 12 mg/L 1 SM 2540C Total/NA Chloride 150 3.0 1.3 mg/L 1 300.0 Dissolved 0 Sulfate 330 15 6.5 mg/L 5 300.0 Dissolved Fluoride 1.5 0.50 0.20 mg/L 1 300.0 Dissolved Client Sample ID: MW-5 Lab Sample ID: 280-215989-4 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Boron 0.23 0.050 0.015 mg/L 1 200.7 Rev 4.4 Dissolved Lithium 0.040 0.020 0.010 mg/L 1 200.7 Rev 4.4 Dissolved Arsenic 0.00088 J 0.0020 0.00050 mg/L 1 200.8 Dissolved Barium 0.079 0.0020 0.00055 mg/L 1 200.8 Dissolved Cobalt 0.00077 J 0.0010 0.00025 mg/L 1 200.8 Dissolved Copper 0.0021 0.0020 0.0010 mg/L 1 200.8 Dissolved Manganese 0.056 0.0030 0.0015 mg/L 1 200.8 Dissolved Molybdenum 0.0054 0.0020 0.00050 mg/L 1 200.8 Dissolved Nickel 0.0022 J 0.0030 0.0010 mg/L 1 200.8 Dissolved Uranium 0.013 0.0010 0.00025 mg/L 1 200.8 Dissolved Total Dissolved Solids(TDS) 760 10 6.0 mg/L 1 SM 2540C Total/NA Chloride 120 3.0 1.3 mg/L 1 300.0 Dissolved Sulfate 230 15 6.5 mg/L 5 300.0 Dissolved Fluoride 1.1 0.50 0.20 mg/L 1 300.0 Dissolved This Detection Summary does not include radiochemical test results. Eurofins Denver Page 7 of 26 11/5/2025 Method Summary Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Method Method Description Protocol Laboratory 200.7 Rev 4.4 Metals(ICP) EPA EET DEN 200.8 Metals(ICP/MS) EPA EET DEN 245.1 Mercury(CVAA) EPA EET DEN 300.0 Anions,Ion Chromatography EPA EET DEN 353.2 Nitrogen,Nitrate-Nitrite EPA EET DEN SM 2540C Solids,Total Dissolved(TDS) SM EET DEN =< 200.7 Preparation,Total Recoverable Metals EPA EET DEN 200.8 Preparation,Total Recoverable Metals EPA EET DEN 245.1 Preparation,Mercury EPA EET DEN Protocol References: EPA=US Environmental Protection Agency SM="Standard Methods For The Examination Of Water And Wastewater" Laboratory References: EET DEN=Eurofins Denver,4955 Yarrow Street,Arvada,CO 80002,TEL(303)736-0100 Eurofins Denver Page 8 of 26 11/5/2025 Sample Summary Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Lab Sample ID Client Sample ID Matrix Collected Received Sample Origin 280-215989-1 MW-1 Water 10/27/25 12:05 10/28/25 11:09 Colorado 280-215989-2 MW-2 Water 10/27/25 12:15 10/28/25 11:09 Colorado 280-215989-3 MW-4 Water 10/27/25 12:40 10/28/25 11:09 Colorado 280-215989-4 MW-5 Water 10/27/25 11:45 10/28/25 11:09 Colorado Eurofins Denver Page 9 of 26 11/5/2025 Client Sample Results Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Method: EPA 200.7 Rev 4.4 - Metals (ICP) - Dissolved Client Sample ID: MW-1 Lab Sample ID: 280-215989-1 Date Collected: 10/27/25 12:05 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Di!Fac Boron 0.28 0.050 0.015 mg/L 10/29/25 16:46 10/30/25 21:38 1 Lithium 0.045 0.020 0.010 mg/L 10/29/25 16:46 10/30/25 21:38 1 Client Sample ID: MW-2 Lab Sample ID: 280-215989-2 Date Collected: 10/27/25 12:15 Matrix: Water Date Received: 10/28/25 11:09 8 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Oil Fac Boron 0.26 0.050 0.015 mg/L 10/29/25 16:46 10/30/25 21:43 1 Lithium 0.034 0.020 0.010 mg/L 10/29/25 16:46 10/30/25 21:43 1 Client Sample ID: MW-4 Lab Sample ID: 280-215989-3 Date Collected: 10/27/25 12:40 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Oil Fac Boron 0.27 0.050 0.015 mg/L 10/29/25 16:46 10/30/25 21:48 1 Lithium 0.038 0.020 0.010 mg/L 10/29/25 16:46 10/30/25 21:48 1 Client Sample ID: MW-5 Lab Sample ID: 280-215989-4 Date Collected: 10/27/25 11:45 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Oil Fac Boron 0.23 0.050 0.015 mg/L 10/29/25 16:46 10/30/25 21:53 1 Lithium 0.040 0.020 0.010 mg/L 10/29/25 16:46 10/30/25 21:53 1 Method: EPA 200.8 - Metals (ICP/MS) - Dissolved Client Sample ID: MW-1 Lab Sample ID: 280-215989-1 Date Collected: 10/27/25 12:05 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Di!Fac Silver ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:04 1 Aluminum ND 0.10 0.025 mg/L 10/29/25 16:46 10/30/25 18:04 1 Arsenic 0.0021 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:04 1 Barium 0.099 0.0020 0.00055 mg/L 10/29/25 16:46 10/30/25 18:04 1 Beryllium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:04 1 Cadmium 0.00035 J 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:04 1 Cobalt 0.0033 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:04 1 Chromium ND 0.0030 0.0010 mg/L 10/29/25 16:46 10/30/25 18:04 1 Copper 0.0061 0.0020 0.0010 mg/L 10/29/25 16:46 10/30/25 18:04 1 Iron ND A+ 0.20 0.050 mg/L 10/29/25 16:46 10/30/25 18:04 1 Manganese 1.8 0.0030 0.0015 mg/L 10/29/25 16:46 10/30/25 18:04 1 Molybdenum 0.0061 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:04 1 Nickel 0.0058 0.0030 0.0010 mg/L 10/29/25 16:46 10/30/25 18:04 1 Lead ND 0.0010 0.00050 mg/L 10/29/25 16:46 10/30/25 18:04 1 Antimony ND 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:04 1 Selenium ND 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:04 1 Thallium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:04 1 Uranium 0.017 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:04 1 Vanadium 0.0019 J 0.0050 0.0015 mg/L 10/29/25 16:46 10/30/25 18:04 1 Zinc ND 0.010 0.0050 mg/L 10/29/25 16:46 10/30/25 18:04 1 Eurofins Denver Page 10 of 26 11/5/2025 Client Sample Results Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Method: EPA 200.8 - Metals (ICP/MS) - Dissolved Client Sample ID: MW-2 Lab Sample ID: 280-215989-2 Date Collected: 10/27/25 12:15 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Silver ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:08 1 Aluminum ND 0.10 0.025 mg/L 10/29/25 16:46 10/30/25 18:08 1 Arsenic 0.00062 J 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:08 1 Barium 0.083 0.0020 0.00055 mg/L 10/29/25 16:46 10/30/25 18:08 1 Beryllium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:08 1 Cadmium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:08 1 8 Cobalt 0.00064 J 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:08 1 Chromium ND 0.0030 0.0010 mg/L 10/29/25 16:46 10/30/25 18:08 1 Copper 0.0013 J 0.0020 0.0010 mg/L 10/29/25 16:46 10/30/25 18:08 1 Iron ND A+ 0.20 0.050 mg/L 10/29/25 16:46 10/30/25 18:08 1 Manganese 0.028 0.0030 0.0015 mg/L 10/29/25 16:46 10/30/25 18:08 1 Molybdenum 0.0021 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:08 1 Nickel 0.0020 J 0.0030 0.0010 mg/L 10/29/25 16:46 10/30/25 18:08 1 Lead ND 0.0010 0.00050 mg/L 10/29/25 16:46 10/30/25 18:08 1 Antimony ND 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:08 1 Selenium 0.0058 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:08 1 Thallium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:08 1 Uranium 0.026 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:08 1 Vanadium ND 0.0050 0.0015 mg/L 10/29/25 16:46 10/30/25 18:08 1 Zinc ND 0.010 0.0050 mg/L 10/29/25 16:46 10/30/25 18:08 1 Client Sample ID: MW-4 Lab Sample ID: 280-215989-3 Date Collected: 10/27/25 12:40 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Silver ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:12 1 Aluminum ND 0.10 0.025 mg/L 10/29/25 16:46 10/30/25 18:12 1 Arsenic 0.00084 J 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:12 1 Barium 0.080 0.0020 0.00055 mg/L 10/29/25 16:46 10/30/25 18:12 1 Beryllium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:12 1 Cadmium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:12 1 Cobalt 0.0016 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:12 1 Chromium ND 0.0030 0.0010 mg/L 10/29/25 16:46 10/30/25 18:12 1 Copper 0.0028 0.0020 0.0010 mg/L 10/29/25 16:46 10/30/25 18:12 1 Iron ND A+ 0.20 0.050 mg/L 10/29/25 16:46 10/30/25 18:12 1 Manganese 0.59 0.0030 0.0015 mg/L 10/29/25 16:46 10/30/25 18:12 1 Molybdenum 0.0092 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:12 1 Nickel 0.0033 0.0030 0.0010 mg/L 10/29/25 16:46 10/30/25 18:12 1 Lead ND 0.0010 0.00050 mg/L 10/29/25 16:46 10/30/25 18:12 1 Antimony ND 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:12 1 Selenium 0.0014 J 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:12 1 Thallium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:12 1 Uranium 0.026 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:12 1 Vanadium ND 0.0050 0.0015 mg/L 10/29/25 16:46 10/30/25 18:12 1 Zinc ND 0.010 0.0050 mg/L 10/29/25 16:46 10/30/25 18:12 1 Eurofins Denver Page 11 of 26 11/5/2025 Client Sample Results Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Method: EPA 200.8 - Metals (ICP/MS) - Dissolved Client Sample ID: MW-5 Lab Sample ID: 280-215989-4 Date Collected: 10/27/25 11:45 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Silver ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:15 1 Aluminum ND 0.10 0.025 mg/L 10/29/25 16:46 10/30/25 18:15 1 Arsenic 0.00088 J 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:15 1 Barium 0.079 0.0020 0.00055 mg/L 10/29/25 16:46 10/30/25 18:15 1 Beryllium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:15 1 Cadmium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:15 1 8 Cobalt 0.00077 J 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:15 1 Chromium ND 0.0030 0.0010 mg/L 10/29/25 16:46 10/30/25 18:15 1 Copper 0.0021 0.0020 0.0010 mg/L 10/29/25 16:46 10/30/25 18:15 1 Iron ND A+ 0.20 0.050 mg/L 10/29/25 16:46 10/30/25 18:15 1 Manganese 0.056 0.0030 0.0015 mg/L 10/29/25 16:46 10/30/25 18:15 1 Molybdenum 0.0054 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:15 1 Nickel 0.0022 J 0.0030 0.0010 mg/L 10/29/25 16:46 10/30/25 18:15 1 Lead ND 0.0010 0.00050 mg/L 10/29/25 16:46 10/30/25 18:15 1 Antimony ND 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:15 1 Selenium ND 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 18:15 1 Thallium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:15 1 Uranium 0.013 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 18:15 1 Vanadium ND 0.0050 0.0015 mg/L 10/29/25 16:46 10/30/25 18:15 1 Zinc ND 0.010 0.0050 mg/L 10/29/25 16:46 10/30/25 18:15 1 Method: EPA 245.1 - Mercury (CVAA) - Dissolved Client Sample ID: MW-1 Lab Sample ID: 280-215989-1 Date Collected: 10/27/25 12:05 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Oil Fac Mercury ND 0.00020 0.000060 mg/L 10/29/25 17:20 10/30/25 15:41 1 Client Sample ID: MW-2 Lab Sample ID: 280-215989-2 Date Collected: 10/27/25 12:15 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury ND 0.00020 0.000060 mg/L 10/29/25 17:20 10/30/25 15:42 1 Client Sample ID: MW-4 Lab Sample ID: 280-215989-3 Date Collected: 10/27/25 12:40 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Oil Fac Mercury ND 0.00020 0.000060 mg/L 10/29/25 17:20 10/30/25 15:44 1 Client Sample ID: MW-5 Lab Sample ID: 280-215989-4 Date Collected: 10/27/25 11:45 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury ND 0.00020 0.000060 mg/L 10/29/25 17:20 10/30/25 15:53 1 Eurofins Denver Page 12 of 26 11/5/2025 Client Sample Results Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells - NCCI Pit#1 - Expan General Chemistry Client Sample ID: MW-1 Lab Sample ID: 280-215989-1 Date Collected: 10/27/25 12:05 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Nitrate Nitrite as N(EPA 353.2) ND 0.20 0.060 mg/L 10/30/25 12:39 1 Total Dissolved Solids(TDS)(SM 1000 20 12 mg/L 10/30/25 09:33 1 2540C) Client Sample ID: MW-2 Lab Sample ID: 280-215989-2 Date Collected: 10/27/25 12:15 Matrix: Water Date Received: 10/28/25 11:09 8 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Nitrate Nitrite as N(EPA 353.2) 0.86 0.20 0.060 mg/L 10/30/25 12:40 1 Total Dissolved Solids(TDS)(SM 1000 20 12 mg/L 10/30/25 09:33 1 2540C) Client Sample ID: MW-4 Lab Sample ID: 280-215989-3 Date Collected: 10/27/25 12:40 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Nitrate Nitrite as N(EPA 353.2) 0.44 0.20 0.060 mg/L 10/30/25 12:41 1 Total Dissolved Solids(TDS)(SM 990 20 12 mg/L 10/30/25 09:33 1 2540C) Client Sample ID: MW-5 Lab Sample ID: 280-215989-4 Date Collected: 10/27/25 11:45 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Nitrate Nitrite as N(EPA 353.2) ND 0.20 0.060 mg/L 10/30/25 12:43 1 Total Dissolved Solids(TDS)(SM 760 10 6.0 mg/L 10/30/25 09:33 1 2540C) General Chemistry - Dissolved Client Sample ID: MW-1 Lab Sample ID: 280-215989-1 Date Collected: 10/27/25 12:05 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Chloride(EPA 300.0) 150 3.0 1.3 mg/L 10/30/25 20:41 1 Sulfate(EPA 300.0) 330 15 6.5 mg/L 10/31/25 21:24 5 Fluoride(EPA 300.0) 1.1 0.50 0.20 mg/L 10/30/25 20:41 1 Client Sample ID: MW-2 Lab Sample ID: 280-215989-2 Date Collected: 10/27/25 12:15 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Chloride(EPA 300.0) 150 3.0 1.3 mg/L 10/30/25 20:55 1 Sulfate(EPA 300.0) 350 15 6.5 mg/L 10/31/25 21:38 5 Fluoride(EPA 300.0) 1.3 0.50 0.20 mg/L 10/30/25 20:55 1 Client Sample ID: MW-4 Lab Sample ID: 280-215989-3 Date Collected: 10/27/25 12:40 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Chloride(EPA 300.0) 150 3.0 1.3 mg/L 10/30/25 21:37 1 Sulfate(EPA 300.0) 330 15 6.5 mg/L 10/31/25 21:52 5 Eurofins Denver Page 13 of 26 11/5/2025 Client Sample Results Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan General Chemistry - Dissolved (Continued) Client Sample ID: MW-4 Lab Sample ID: 280-215989-3 Date Collected: 10/27/25 12:40 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride(EPA 300.0) 1.5 0.50 0.20 mg/L 10/30/25 21:37 1 Client Sample ID: MW-5 Lab Sample ID: 280-215989-4 Date Collected: 10/27/25 11:45 Matrix: Water Date Received: 10/28/25 11:09 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Q Chloride(EPA 300.0) 120 3.0 1.3 mg/L 10/30/25 21:51 1 v Sulfate(EPA 300.0) 230 15 6.5 mg/L 10/31/25 22:06 5 Fluoride(EPA 300.0) 1.1 0.50 0.20 mg/L 10/30/25 21:51 1 Eurofins Denver Page 14 of 26 11/5/2025 QC Sample Results Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Method: 200.7 Rev 4.4 - Metals (ICP) Lab Sample ID: MB 280-720230/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total Recoverable Analysis Batch: 720553 Prep Batch: 720230 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Di!Fac Boron ND 0.050 0.015 mg/L 10/29/25 16:46 10/30/25 20:29 1 Lithium ND 0.020 0.010 mg/L 10/29/25 16:46 10/30/25 20:29 1 Lab Sample ID: LCS 280-720230/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total Recoverable Analysis Batch: 720553 Prep Batch: 720230 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Boron 2.00 2.10 mg/L 105 85-115 Lithium 1.00 1.03 mg/L 103 85-115 Method: 200.8 - Metals (ICP/MS) Lab Sample ID: MB 280-720230/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total Recoverable Analysis Batch: 720511 Prep Batch: 720230 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Di!Fac Silver ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 17:16 1 Aluminum ND 0.10 0.025 mg/L 10/29/25 16:46 10/30/25 17:16 1 Arsenic ND 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 17:16 1 Barium ND 0.0020 0.00055 mg/L 10/29/25 16:46 10/30/25 17:16 1 Beryllium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 17:16 1 Cadmium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 17:16 1 Cobalt ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 17:16 1 Chromium ND 0.0030 0.0010 mg/L 10/29/25 16:46 10/30/25 17:16 1 Copper ND 0.0020 0.0010 mg/L 10/29/25 16:46 10/30/25 17:16 1 Iron ND 0.20 0.050 mg/L 10/29/25 16:46 10/30/25 17:16 1 Manganese ND 0.0030 0.0015 mg/L 10/29/25 16:46 10/30/25 17:16 1 Molybdenum ND 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 17:16 1 Nickel ND 0.0030 0.0010 mg/L 10/29/25 16:46 10/30/25 17:16 1 Lead ND 0.0010 0.00050 mg/L 10/29/25 16:46 10/30/25 17:16 1 Antimony ND 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 17:16 1 Selenium ND 0.0020 0.00050 mg/L 10/29/25 16:46 10/30/25 17:16 1 Thallium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 17:16 1 Uranium ND 0.0010 0.00025 mg/L 10/29/25 16:46 10/30/25 17:16 1 Vanadium ND 0.0050 0.0015 mg/L 10/29/25 16:46 10/30/25 17:16 1 Zinc ND 0.010 0.0050 mg/L 10/29/25 16:46 10/30/25 17:16 1 Lab Sample ID: LCS 280-720230/26-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total Recoverable Analysis Batch: 720511 Prep Batch: 720230 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Silver 0.0400 0.0428 mg/L 107 85-115 Aluminum 0.800 0.839 mg/L 105 85-115 Arsenic 0.0400 0.0406 mg/L 101 85-115 Barium 0.0400 0.0415 mg/L 104 85-115 Beryllium 0.0400 0.0390 mg/L 97 85-115 Eurofins Denver Page 15 of 26 11/5/2025 QC Sample Results Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Method: 200.8 - Metals (ICP/MS) (Continued) Lab Sample ID: LCS 280-720230/26-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total Recoverable Analysis Batch: 720511 Prep Batch: 720230 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Cadmium 0.0400 0.0397 mg/L 99 85-115 Cobalt 0.0400 0.0391 mg/L 98 85-115 Chromium 0.0400 0.0393 mg/L 98 85-115 Copper 0.0400 0.0410 mg/L 103 85-115 Iron 0.800 0.848 mg/L 106 85-115 Manganese 0.0400 0.0398 mg/L 100 85-115 Molybdenum 0.0400 0.0402 mg/L 101 85-115 Nickel 0.0400 0.0397 mg/L 99 85-115 Lead 0.0400 0.0383 mg/L 96 85-115 Antimony 0.0400 0.0405 mg/L 101 85-115 Selenium 0.0400 0.0409 mg/L 102 85-115 Thallium 0.0400 0.0374 mg/L 93 85-115 Uranium 0.0400 0.0424 mg/L 106 85-115 Vanadium 0.0400 0.0395 mg/L 99 85-115 Zinc 0.0400 0.0424 mg/L 106 85-115 Method: 245.1 - Mercury (CVAA) Lab Sample ID: MB 280-720238/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 720488 Prep Batch: 720238 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Di!Fac Mercury ND 0.00020 0.000060 mg/L 10/29/25 17:20 10/30/25 15:33 1 Lab Sample ID: LCS 280-720238/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 720488 Prep Batch: 720238 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Mercury 0.00500 0.00517 mg/L 103 85-115 Lab Sample ID: 280-215989-3 MS Client Sample ID: MW-4 Matrix: Water Prep Type: Dissolved Analysis Batch: 720488 Prep Batch: 720238 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Mercury ND 0.00500 0.00509 mg/L 102 80-120 Lab Sample ID: 280-215989-3 MSD Client Sample ID: MW-4 Matrix: Water Prep Type: Dissolved Analysis Batch: 720488 Prep Batch: 720238 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Mercury ND 0.00500 0.00511 mg/L 102 80-120 0 20 Eurofins Denver Page 16 of 26 11/5/2025 QC Sample Results Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Method: 300.0 - Anions, Ion Chromatography Lab Sample ID: MB 280-720350/6 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 720350 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Chloride ND 3.0 1.3 mg/L 10/30/25 13:53 1 Fluoride ND 0.50 0.20 mg/L 10/30/25 13:53 1 Lab Sample ID: LCS 280-720350/4 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 720350 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Chloride 100 102 mg/L 102 90-110 Fluoride 5.00 5.11 mg/L 102 90-110 Lab Sample ID: LCSD 280-720350/5 Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 720350 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Chloride 100 102 mg/L 102 90-110 0 10 Fluoride 5.00 5.08 mg/L 102 90-110 1 10 Lab Sample ID: MRL 280-720350/3 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 720350 Spike MRL MRL %Rec Analyte Added Result Qualifier Unit D %Rec Limits Chloride 3.00 3.26 mg/L 109 50-150 Fluoride 0.500 0.605 mg/L 121 50-150 Lab Sample ID: MB 280-720587/6 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 720587 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate ND 3.0 1.3 mg/L 10/31/25 14:07 1 Lab Sample ID: LCS 280-720587/4 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 720587 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Sulfate 100 103 mg/L 103 90-110 Lab Sample ID: LCSD 280-720587/5 Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 720587 Spike LCSD LCSD %Rec RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Sulfate 100 103 mg/L 103 90-110 0 10 Eurofins Denver Page 17 of 26 11/5/2025 QC Sample Results Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Method: 300.0 - Anions, Ion Chromatography (Continued) Lab Sample ID: MRL 280-720587/3 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 720587 Spike MRL MRL %Rec Analyte Added Result Qualifier Unit D %Rec Limits Sulfate 3.00 3.61 mg/L 120 50-150 Lab Sample ID: 280-215989-4 MS Client Sample ID: MW-5 Matrix: Water Prep Type: Dissolved Analysis Batch: 720350 Sample Sample Spike MS MS %Rec Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Chloride 120 50.0 175 mg/L 103 90-110 Fluoride 1.1 5.00 6.24 mg/L 103 90-110 Lab Sample ID: 280-215989-4 MSD Client Sample ID: MW-5 Matrix: Water Prep Type: Dissolved Analysis Batch: 720350 Sample Sample Spike MSD MSD %Rec RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Chloride 120 50.0 175 mg/L 103 90-110 0 15 Fluoride 1.1 5.00 6.24 mg/L 103 90-110 0 15 Lab Sample ID: 280-215989-4 DU Client Sample ID: MW-5 Matrix: Water Prep Type: Dissolved Analysis Batch: 720350 Sample Sample DU DU RPD Analyte Result Qualifier Result Qualifier Unit D RPD Limit Chloride 120 123 mg/L 0 15 Fluoride 1.1 1.09 mg/L 0.4 15 Method: 353.2 - Nitrogen, Nitrate-Nitrite Lab Sample ID: MB 280-720412/26 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 720412 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Nitrate Nitrite as N ND 0.20 0.060 mg/L 10/30/25 12:09 1 Lab Sample ID: LCS 280-720412/27 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 720412 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Nitrate Nitrite as N 1.00 1.02 mg/L 102 90-110 Method: SM 2540C - Solids, Total Dissolved (TDS) Lab Sample ID: MB 280-720320/1 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 720320 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Total Dissolved Solids(TDS) ND 10 6.0 mg/L 10/30/25 09:33 1 Eurofins Denver Page 18 of 26 11/5/2025 QC Sample Results Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Method: SM 2540C - Solids, Total Dissolved (TDS) (Continued) Lab Sample ID: LCS 280-720320/2 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 720320 Spike LCS LCS %Rec Analyte Added Result Qualifier Unit D %Rec Limits Total Dissolved Solids(TDS) 501 500 mg/L 100 88-114 9 Eurofins Denver Page 19 of 26 11/5/2025 QC Association Summary Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Metals Prep Batch: 720230 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-215989-1 MW-1 Dissolved Water 200.8 280-215989-2 MW-2 Dissolved Water 200.8 280-215989-3 MW-4 Dissolved Water 200.7 280-215989-4 MW-5 Dissolved Water 200.7 MB 280-720230/1-A Method Blank Total Recoverable Water 200.7 LCS 280-720230/26-A Lab Control Sample Total Recoverable Water 200.7 LCS 280-720230/2-A Lab Control Sample Total Recoverable Water 200.7 Prep Batch: 720238 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-215989-1 MW-1 Dissolved Water 245.1 280-215989-2 MW-2 Dissolved Water 245.1 280-215989-3 MW-4 Dissolved Water 245.1 280-215989-4 MW-5 Dissolved Water 245.1 MB 280-720238/1-A Method Blank Total/NA Water 245.1 LCS 280-720238/2-A Lab Control Sample Total/NA Water 245.1 280-215989-3 MS MW-4 Dissolved Water 245.1 280-215989-3 MSD MW-4 Dissolved Water 245.1 Analysis Batch: 720488 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-215989-1 MW-1 Dissolved Water 245.1 720238 280-215989-2 MW-2 Dissolved Water 245.1 720238 280-215989-3 MW-4 Dissolved Water 245.1 720238 280-215989-4 MW-5 Dissolved Water 245.1 720238 MB 280-720238/1-A Method Blank Total/NA Water 245.1 720238 LCS 280-720238/2-A Lab Control Sample Total/NA Water 245.1 720238 280-215989-3 MS MW-4 Dissolved Water 245.1 720238 280-215989-3 MSD MW-4 Dissolved Water 245.1 720238 Analysis Batch: 720511 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-215989-1 MW-1 Dissolved Water 200.8 720230 280-215989-2 MW-2 Dissolved Water 200.8 720230 280-215989-3 MW-4 Dissolved Water 200.8 720230 280-215989-4 MW-5 Dissolved Water 200.8 720230 MB 280-720230/1-A Method Blank Total Recoverable Water 200.8 720230 LCS 280-720230/26-A Lab Control Sample Total Recoverable Water 200.8 720230 Analysis Batch: 720553 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-215989-1 MW-1 Dissolved Water 200.7 Rev 4.4 720230 280-215989-2 MW-2 Dissolved Water 200.7 Rev 4.4 720230 280-215989-3 MW-4 Dissolved Water 200.7 Rev 4.4 720230 280-215989-4 MW-5 Dissolved Water 200.7 Rev 4.4 720230 MB 280-720230/1-A Method Blank Total Recoverable Water 200.7 Rev 4.4 720230 LCS 280-720230/2-A Lab Control Sample Total Recoverable Water 200.7 Rev 4.4 720230 Eurofins Denver Page 20 of 26 11/5/2025 QC Association Summary Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan General Chemistry Analysis Batch: 720320 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-215989-1 MW-1 Total/NA Water SM 2540C 280-215989-2 MW-2 Total/NA Water SM 2540C 280-215989-3 MW-4 Total/NA Water SM 2540C 280-215989-4 MW-5 Total/NA Water SM 2540C MB 280-720320/1 Method Blank Total/NA Water SM 2540C LCS 280-720320/2 Lab Control Sample Total/NA Water SM 2540C Analysis Batch: 720350 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-215989-1 MW-1 Dissolved Water 300.0 280-215989-2 MW-2 Dissolved Water 300.0 280-215989-3 MW-4 Dissolved Water 300.0 A 0 280-215989-4 MW-5 Dissolved Water 300.0 1 MB 280-720350/6 Method Blank Total/NA Water 300.0 LCS 280-720350/4 Lab Control Sample Total/NA Water 300.0 LCSD 280-720350/5 Lab Control Sample Dup Total/NA Water 300.0 MRL 280-720350/3 Lab Control Sample Total/NA Water 300.0 280-215989-4 MS MW-5 Dissolved Water 300.0 280-215989-4 MSD MW-5 Dissolved Water 300.0 280-215989-4 DU MW-5 Dissolved Water 300.0 Analysis Batch: 720412 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-215989-1 MW-1 Total/NA Water 353.2 280-215989-2 MW-2 Total/NA Water 353.2 280-215989-3 MW-4 Total/NA Water 353.2 280-215989-4 MW-5 Total/NA Water 353.2 MB 280-720412/26 Method Blank Total/NA Water 353.2 LCS 280-720412/27 Lab Control Sample Total/NA Water 353.2 Analysis Batch: 720587 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 280-215989-1 MW-1 Dissolved Water 300.0 280-215989-2 MW-2 Dissolved Water 300.0 280-215989-3 MW-4 Dissolved Water 300.0 280-215989-4 MW-5 Dissolved Water 300.0 MB 280-720587/6 Method Blank Total/NA Water 300.0 LCS 280-720587/4 Lab Control Sample Total/NA Water 300.0 LCSD 280-720587/5 Lab Control Sample Dup Total/NA Water 300.0 MRL 280-720587/3 Lab Control Sample Total/NA Water 300.0 Eurofins Denver Page 21 of 26 11/5/2025 Lab Chronicle Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Client Sample ID: MW-1 Lab Sample ID: 280-215989-1 Date Collected: 10/27/25 12:05 Matrix: Water Date Received: 10/28/25 11:09 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Dissolved Prep 200.8 50 mL 50 mL 720230 10/29/25 16:46 SMK EET DEN Dissolved Analysis 200.7 Rev 4.4 1 720553 10/30/25 21:38 CAF EET DEN Dissolved Prep 200.8 50 mL 50 mL 720230 10/29/25 16:46 SMK EET DEN Dissolved Analysis 200.8 1 720511 10/30/25 18:04 LMT EET DEN Dissolved Prep 245.1 30 mL 50 mL 720238 10/29/25 17:20 SMK EET DEN Dissolved Analysis 245.1 1 720488 10/30/25 15:41 SMK EET DEN Dissolved Analysis 300.0 1 10 mL 10 mL 720350 10/30/25 20:41 SLH EET DEN Dissolved Analysis 300.0 5 10 mL 10 mL 720587 10/31/25 21:24 IRC EET DEN Total/NA Analysis 353.2 1 100 mL 100 mL 720412 10/30/25 12:39 AKF EET DEN Total/NA Analysis SM 2540C 1 50 mL 100 mL 720320 10/30/25 09:33 YBF EET DEN Client Sample ID: MW-2 Lab Sample ID: 280-215989-2 Date Collected: 10/27/25 12:15 Matrix: Water Date Received: 10/28/25 11:09 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Dissolved Prep 200.8 50 mL 50 mL 720230 10/29/25 16:46 SMK EET DEN Dissolved Analysis 200.7 Rev 4.4 1 720553 10/30/25 21:43 CAF EET DEN Dissolved Prep 200.8 50 mL 50 mL 720230 10/29/25 16:46 SMK EET DEN Dissolved Analysis 200.8 1 720511 10/30/25 18:08 LMT EET DEN Dissolved Prep 245.1 30 mL 50 mL 720238 10/29/25 17:20 SMK EET DEN Dissolved Analysis 245.1 1 720488 10/30/25 15:42 SMK EET DEN Dissolved Analysis 300.0 1 10 mL 10 mL 720350 10/30/25 20:55 SLH EET DEN Dissolved Analysis 300.0 5 10 mL 10 mL 720587 10/31/25 21:38 IRC EET DEN Total/NA Analysis 353.2 1 100 mL 100 mL 720412 10/30/25 12:40 AKF EET DEN Total/NA Analysis SM 2540C 1 50 mL 100 mL 720320 10/30/25 09:33 YBF EET DEN Client Sample ID: MW-4 Lab Sample ID: 280-215989-3 Date Collected: 10/27/25 12:40 Matrix: Water Date Received: 10/28/25 11:09 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Dissolved Prep 200.7 50 mL 50 mL 720230 10/29/25 16:46 SMK EET DEN Dissolved Analysis 200.7 Rev 4.4 1 720553 10/30/25 21:48 CAF EET DEN Dissolved Prep 200.7 50 mL 50 mL 720230 10/29/25 16:46 SMK EET DEN Dissolved Analysis 200.8 1 720511 10/30/25 18:12 LMT EET DEN Dissolved Prep 245.1 30 mL 50 mL 720238 10/29/25 17:20 SMK EET DEN Dissolved Analysis 245.1 1 720488 10/30/25 15:44 SMK EET DEN Dissolved Analysis 300.0 1 10 mL 10 mL 720350 10/30/25 21:37 SLH EET DEN Dissolved Analysis 300.0 5 10 mL 10 mL 720587 10/31/25 21:52 IRC EET DEN Total/NA Analysis 353.2 1 100 mL 100 mL 720412 10/30/25 12:41 AKF EET DEN Total/NA Analysis SM 2540C 1 50 mL 100 mL 720320 10/30/25 09:33 YBF EET DEN Eurofins Denver Page 22 of 26 11/5/2025 Lab Chronicle Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Client Sample ID: MW-5 Lab Sample ID: 280-215989-4 Date Collected: 10/27/25 11:45 Matrix: Water Date Received: 10/28/25 11:09 Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Dissolved Prep 200.7 50 mL 50 mL 720230 10/29/25 16:46 SMK EET DEN Dissolved Analysis 200.7 Rev 4.4 1 720553 10/30/25 21:53 CAF EET DEN Dissolved Prep 200.7 50 mL 50 mL 720230 10/29/25 16:46 SMK EET DEN Dissolved Analysis 200.8 1 720511 10/30/25 18:15 LMT EET DEN Dissolved Prep 245.1 30 mL 50 mL 720238 10/29/25 17:20 SMK EET DEN Dissolved Analysis 245.1 1 720488 10/30/25 15:53 SMK EET DEN Dissolved Analysis 300.0 1 10 mL 10 mL 720350 10/30/25 21:51 SLH EET DEN Dissolved Analysis 300.0 5 10 mL 10 mL 720587 10/31/25 22:06 IRC EET DEN Total/NA Analysis 353.2 1 100 mL 100 mL 720412 10/30/25 12:43 AKF EET DEN Total/NA Analysis SM 2540C 1 100 mL 100 mL 720320 10/30/25 09:33 YBF EET DEN Laboratory References: EET DEN=Eurofins Denver,4955 Yarrow Street,Arvada,CO 80002,TEL(303)736-0100 Eurofins Denver Page 23 of 26 11/5/2025 Accreditation/Certification Summary Client: J&T Consulting, Inc. Job ID: 280-215989-1 Project/Site: Quarterly Monitoring Wells- NCCI Pit#1 - Expan Laboratory: Eurofins Denver All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Authority Program Identification Number Expiration Date A2LA Dept.of Defense ELAP 2907.01 10-31-26 A2LA ISO/IEC 17025 2907.01 10-31-26 Alabama State Program 40730 09-30-12" Alaska(UST) State 18-001 11-30-26 Arizona State AZ0713 12-19-25 Arkansas DEQ State 88-00687 04-02-26 California State 2513 01-08-26 Colorado Petroleum Storage Tank Program 2907.01 (A2LA) 10-31-26 Colorado State CO00026 06-30-26 Connecticut State PH-0686 09-30-26 Florida NELAP E87667 06-30-26 Georgia State 4025 01-08-26 Illinois NELAP 200017 05-31-26 Iowa State 370 12-01-26 Kansas NELAP E-10166 04-30-26 Kentucky(WW) State KY98047 12-31-25 Louisiana NELAP 30785 06-30-14* Louisiana(All) NELAP 30785 06-30-26 Minnesota NELAP 1788752 12-31-25 Montana(DW) State CERT0117 01-01-26 Nevada State CO00026 07-31-26 New Hampshire NELAP 2053 04-28-26 New Jersey NELAP CO004 06-30-26 New York NELAP 11964 04-01-26 North Dakota State R-034 07-25-25" Oklahoma NELAP 8614 12-31-25 Oregon NELAP 4025 01-08-26 Pennsylvania NELAP 68-00664 07-31-26 South Carolina State 72002001 01-18-26 Texas NELAP TX104704183-08-TX 09-30-09" Texas NELAP T104704183 09-30-26 US Fish&Wildlife US Federal Programs 058448 07-31-26 USDA US Federal Programs P330-20-00065 12-19-25 Utah NELAP QUANS 06-30-13" Utah NELAP CO00026 07-31-26 Virginia NELAP 460232 06-14-26 Washington State C583 08-03-26 West Virginia DEP State 354 11-30-25 Wisconsin State 999615430 08-31-26 Wyoming(UST) A2LA 2907.01 10-31-26 "Accreditation/Certification renewal pending-accreditation/certification considered valid. Eurofins Denver Page 24 of 26 11/5/2025 b - - — 0 N O co -c C c U v is w N N E 0 0 C.) m VVI c C , .4 1 Q� c 4- o ° aoi C's V �. 0y m v n. 6 Z2c8 u, 0) �.I .) z C o o Z OC �" \ OJ m O)n ` . S= = J ••l. o0 as ii azo,C 5 —0 , . •V. siaweluoo;o)agwnN le;ol _ C u _m C `�� 0)ra C 1 _p a �� O �J z 3 E O O O m U m m N O c -p m v �� `o d) tO 0 2' o m co U O a U in 3 - ca N w E aCD CO Q c m U) (paiall!d X X X X !N m �- O N E .y PIa!d)01E110S 8 apu0nld'apuo19O P0nloos!O-08Z O'OOt Z - --�0 CO Q 41, ;... a TE $ ea (PaJa)I!d Plaid) Nnaaw pan!oss!O-L'S4Z X X X X —N d Cr \ cii Q (pa,a31!d PIa!d) slelaW OZ panloss!O-8'OOZ X X X X Q o Q t \ "iFi o O N O �`� a O (Pajawd Pla!d) wn!4111 8 uoJO0 pan!oss!O-1"OOZ X X X X O !_ r, lal a� alai! a e�)! ua6o�! sai _ O_ E a ��o a E ct N-7 N' 7N- d Z'fSf X X X X C c v y .1= T g 13 _� 'it' (di cai o (sat)sP!IoS Pan!oss!O lelol-Poled O04SZ Z X X X X E 8 0. 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N C E Q o a Y N > o c� (0 E ,., # m C a) on s d a 4- `6 _ , c c d (0 N ia3 2 a d O ` Y c O > d CU} `mU 0 Nm Y t ° > N >v >n Z ( T - 4 y < c - U 7 > > N -' 0, Q Q o W rn Z L d °'U o 5 $o Z'0 o 0 .0 E , o d U a d E - = U v ¢ a U v-� c)-� a r) v in U 0.ci w'?a Q in Z y 4 0 W cc ce Page 25 of 26 11/5/2025 Login Sample Receipt Checklist Client: J&T Consulting, Inc. Job Number: 280-215989-1 Login Number: 215989 List Source: Eurofins Denver List Number: 1 Creator: Little, Matthew L Question Answer Comment Radioactivity wasn't checked or is</= background as measured by a survey True meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time(excluding tests with immediate True 4 HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. N/A There is sufficient vol.for all requested analyses, incl.any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins Denver Page 26 of 26 11/5/2025 McGrane Water Engineering, LLC 1669 Apple Valley Rd. •Lyons,CO 80540•Phone:(303)917-1247 E-Mail:dennis@mcgranewater.com - McGrane Water Engineering November 18, 2025 Mr. JC York J&T Consulting, Inc. 305 Denver Avenue, Suite D Via email at:jcyork@j-tconsulting.com Ft. Lupton, CO 80621 RE: NCCI North Pit—Groundwater Evaluation Dear Mr. York: NCCI operates a gravel mine located approximately 3 miles northwest of Fort Lupton, Colorado. McGrane Water Engineering, LLC(MWE)was retained by J&T Consulting, Inc. (Fort Lupton, Colorado)to evaluate impacts to groundwater conditions associated with: 1. NCCI installing a slurry wall around the proposed NCCI Expansion Area; 2. Other parties installing a slurry wall around the future Heinz gravel mine expansion located to the east; and 3. NCCI potentially extending the subsurface drain located west of NCCI Existing Pit further to the north. EXECUTIVE SUMMARY This report includes: • A site summary including: i)background; ii) a discussion of impacts to groundwater levels and subsurface drain flows from the proposed NCCI and Heinz gravel mine expansions; and iii) conclusions and recommendations. • Appendix A—Memo from Calvin Miller,PhD focusing on the hydrologic impacts of the NCCI And Heinz pit expansions; and • Appendix B—MWE report dated November 2020,titled"Water Level Change and Pit Drain Evaluation in the Vicinity of the NCCI Pit, Ft. Lupton, Colorado. Appendix A includes: 1. NCCI pit expansion modeling approach; 2. NCCI model recalibration to new groundwater level data in NCCI Expansion Area; 3. NCCI expansion impact evaluation and results; 4. Heinz pit impact evaluation and results; and 5. Summary and Recommendations Appendix B discusses: 1. Vicinity hydrogeology; 2. Pre-development groundwater levels; 3. Seasonal groundwater level changes caused by recharge from nearby Little Dry Creek and the Lupton Bottom Ditch; NCCI North Pit Groundwater Evaluation Page 2 of 4 4. Groundwater level changes previously projected in 2020 from lining the now-existing NCCI pit; 5. Groundwater level changes caused by LGE pits to the south and Lupton Meadows,Heit and Koenig pits to the north; 6. Initial drain flow predictions; and 7. Conclusions and Recommendations in 2020 NCCI Mine Development History The MWE impact report for the now-existing NCCI pit was completed in 2020. The mine's two pits/cells are outlined in yellow in Figure 1. The larger cell was lined with a clay liner circa 2023, and the smaller cell to the northwest is unlined but filled with fine-material and overburden soils from past mining operations. The subsurface drain was installed in November 2024 along the west side of the larger cell (Figure 1)to manage groundwater levels along that west side of the pit. Recorded drain flows are plotted and tabulated along with hydrographs of monitoring wells in Appendix A. NCCI North Pit and Heinz Pit Water Level and Drain Impact Summary NCCI now plans to expand into an area located directly north of the existing lined pit(Figure 1). The nearby Heinz gravel mine is also proposing to add two large mine cells to the east of the existing NCCI mine (Figure 1). The Colorado DRMS has recently requested that NCCI evaluate how the proposed NCCI and Heinz pit expansions may affect groundwater levels, and how that may affect flows from the existing NCCI subdrain. To address these questions,we updated the 2020 groundwater model to incorporate the newly available data in the proposed expansion area and the newly recorded flows from the 2024 subdrain installation, and then added the future expansion area liner and Heinz pit liners to consider likely changes in drain flows and water levels. The model indicates that groundwater changes around the proposed NCCI expansion will be small, with a rise in water table of only approximately 1 foot in a small area near the northwest side, and a decline in water levels of approximately 1 foot on the northeast side (Appendix A,Figure 11). This projection of a small change is reasonable because the gradient across the expansion area is already relatively flat (Appendix A, Figure 8) due to it being in the shadow of the existing NCCI pit. The NCCI subdrain contributes to this flat gradient as well. No significant change in water levels is computed by the model along the existing NCCI drain(Figure 11) and no meaningful increase in NCCI drain flow is predicted from the NCCI expansion. When the Heinz expansion is added to the model, there is no additional rise to the west because the existing NCCI pit already blocks groundwater. The model also does not show a significant change to existing NCCI drain flows. Between the two future Heinz pits, seepage from the Meadow Island ditch will be confined to a small area between the liners which may cause a rise in the water table between the Heinz pits. If an increase in the water table at or near the ditch would present a problem, then monitoring is recommended for this area. Downgradient from the planned Heinz pits, water levels are projected to drop approximately four feet immediately next to the pits, and around 1 to 3 feet further downgradient(Appendix A,Figure 12). Due to the proximity to the South Platte River, MWE does not expect the area of decline to expand further than projected or to reduce existing well yields. McGrane Water Engineering,LLC 1669 Apple Valley Rd. • Lyons,CO 80540 •Phone: (303)917-1247;email:dennis@mcgranewater.com NCCI North Pit Groundwater Evaluation Page 3 of 4 CONCLUSIONS AND RECOMMENDATIONS We conclude: 1. That the cumulative impact caused by lined pits in the vicinity of the NCCI Pits are small; 2. The expected impact of the NCCI expansion is also small; therefore, 3. We see no reason to extend the NCCI drain at this time. If you have any questions,please give me a call. Sincerely, McGrane Water Engineers,Inc. c'D /40)::/i Dennis McGrane, P.E., C.P.G Professional Credentials The technical material in this report was prepared by, or under the supervision and direction of Dennis McGrane P.E,C.P.G.,whose seal as a Professional Engineer in the State of Colorado and American Institute of Professional Geologists (AIPG) Certified Profession Geologist(CPG) are affixed below: allab 4CRIg., r C -*fox. 1 G+ffy 44-p ` r�� ,��yy rf R u1/44,.. • , • .1.1. fjV 3326� . f• �� jyyr .yl.; r W • \ I� i S i C? egos McGrane Water Engineering,LLC 1669 Apple Valley Rd. • Lyons,CO 80540 •Phone: (303)917-1247;email:dennis@mcgranewater.com FIGURE 1 Figure 1. NCCI and Heinz gravel mines northwest of Fort Lupton, Colorado. Page 4 of 4 o tN • - "1, ../ i ., 'a ft ", "IA. 'iM mr 1,41 . } - j. M pyj�`• W" t4 } v _ —"---- '4, i ' ,.octel-• -.. '-u "AP-171,''',:' \, ' . 1' ::: "- ' *. ' ' 0 5 ,/ y '"• t .i a ': • • .. I N � a ,'NE pit i1 t �•,, i i. .� ._ .s'- �, �� ;(fines) tom' o �, _.„ Vktite. .` *:, *. ( NCI �1 f ' ci cdrren t . �- - i a) - fines 'xpa9lision f' \.4'. area;; - �•� c J pit I -a Irry wall i~ . i,,,r. c' O �, v current L 5 ••it .1 Qc co I r- c. — Tined) C..."1. Z2 Z� r; ,.,, Y ., ` • , ! :' + Z1 2. �'+ ',. % T tai) _ .J c) .....011 ' , , ' . 4 ', it I y '. i�v d Ti � 3,185,000 3,186,000 3,187,000 3,188,000 3,189,000 3,190,000 3,191,000 easting (State Plane, feet) i Project: NCCI pit expansion-groundwater evaluation 2025 NCCI North Pit Groundwater Evaluation APPENDIX A—Memo from Calvin Miller,PhD re: NCCI North Pit Impacts and Drain Flow Predictions McGrane Water Engineering,LLC 1669 Apple Valley Rd. • Lyons,CO 80540 •Phone: (303)917-1247;email:dennis@mcgranewater.com Miller Groundwater Engineering, LLC Consulting, Contracting, Numerical Modeling 324 Remington Street,Suite 110 Fort Collins,CO 80524 970.492.5710 Technical Memorandum To: Dennis McGrane, PE - McGrane Water Engineering, LLC From: Calvin Miller, PE, PhD - Miller Groundwater Engineering, LLC cc: J.C. York—J&T Consulting, Inc. Date: November 14, 2025 Subject: Update of NCCI Groundwater Model for Proposed NCCI Mine Expansion As requested, Miller Groundwater Engineering (MGE) has updated NCCI's transient groundwater model and used it to evaluate future groundwater changes to be expected from NCCI's proposed mine expansion. This memo presents MGE's updates and modeling results. Background NCCI operates a gravel mine located approximately 3 miles northwest of Fort Lupton, Colorado. The existing mine's two pits/cells are outlined in yellow in Figure 1. The large cell is lined with a clay liner and the smaller cell to the northwest is unlined but now filled with fine material and overburden soils from past mining operations.' NCCI installed a subsurface drain in November 2024 along the west side of the larger cell (Figure 1) to manage groundwater levels along that side of the pit. NCCI now plans to expand into the area directly north of the existing lined pit. The orange outline in Figure 1 shows the planned slurry wall location which will be around two mine cells within it. The dashed orange line to the northeast shows the location of a future cell (Northeast Pit) that will be backfilled with fines after mining. The nearby Heinz gravel mine is also proposing to add two large mine cells to the east of the NCCI mine. The future Heinz pits are shown with red outlines in Figure 1. 1 A past report(MWE 2020) referred to the large cell as the South Pit and the northwest backfilled cell as the North Pit, but due to the proposed expansion which will have additional cells,the 2020 names are no longer consistent and are not used herein. DENNIS MCGRANE NCCI GRAVEL MINE-PROPOSED EXPANSION NOVEMBER 14,2025 The Colorado DRMS has requested that NCCI evaluate how its expansion may affect groundwater levels in the vicinity and how that may affect flows from the NCCI subdrain. DRMS has asked NCCI to also consider the future Heinz pits (Figure 1). Approach - Update and Use Existing Groundwater Model for Evaluation In 2020, on behalf of NCCI, MGE constructed and applied a groundwater flow model of the area to evaluate similar DRMS questions about the likely scale of groundwater mounding (rises) and shadowing (declines) around the then-proposed NCCI mine cells. That model and evaluation results were presented as part of a McGrane Water Engineering (MWE) report dated November 2020. The 2020 MWE report provides extensive information about the area hydrogeology, model construction, and model simulations done for that first evaluation. For brevity, we refer the reader to the 2020 MWE report for that additional information while this report discusses only updates to the model and the results of the current evaluation. Checking 2020/2024 Model Against New Field Observations NCCI has measured groundwater elevations monthly for several years at monitoring wells Z1 through Z7 (Table 1). In early 2024, NCCI added monitoring at wells G1, G2, G4, and G5 in the planned expansion area (Table 2). These 11 monitoring locations are shown in Figure 1. NCCI also measures daily discharge from the subsurface drain (Table 3). The monitoring well and drain measurements are plotted in Figure 2. The November 2020 model report included estimated flows from a then-conceptual subdrain plan. The flows from that drain were estimated to vary seasonally over a range from about zero in low water conditions to about 1 cubic foot per second (cfs) during seasonal high-water conditions. Next, in Spring 2024, MGE updated NCCI's groundwater model to include the refined drain design. The purpose of the 2024 update was to guide pipe sizing to accommodate expected drain flows. The Spring 2024 drain design was deeper than the 2020 conceptual drain plan, and consequently the 2024 model projected higher drain flows with a seasonal variation ranging from 0.75 cfs to near 4 cfs. The 2020 and 2024 models' drain flow projections are compared to the now-measured drain flows in Figure 3.2 2 The model simulation seen in Figure 3 is from the 2020 modeling which used a simplified representation of a 10- year period with two cycles per year to represent the irrigation and non-irrigation seasons in which canals and canal seepage cycle on and off. The 2024-2025 observed drain flows are superimposed on a given generic year which is not intended to represent the schedules of a specific year. Miller Groundwater Engineering, LLC Page 12 DENNIS MCGRANE NCCI GRAVEL MINE-PROPOSED EXPANSION NOVEMBER 14,2025 For this Fall 2025 report, MGE has now updated NCCI's model to reflect the as-built drain conditions. The as-built plans were not substantially different than the construction plans modeled in Spring 2024, but the model was updated for consistency. The modeled drain flows from the as-built drain are also shown in Figure 3. MGE was satisfied that projections from the 2024 model (planned drain) and initial 2025 model update (as-built drain) closely matched the observed range of drain flows, and therefore MGE concluded that no substantial model update was needed for drain flow projections. In particular, MGE notes that the prior modeling represented generic annual water cycles and would not be expected to match the exact timing of flow fluctuations in a specific year. MGE believes the important factor here is to match the observed range of drain flows. Despite being satisfied with the 2024 model for drain flows, MGE also evaluated the new monitoring well data in the expansion area and elected to make adjustments to the timing and amount of hydrologic cycle water inputs to the model in order to adjust the model's calibration to the newer monitoring data in the expansion area. That calibration adjustment is discussed in the following sections, and the drain flow simulation output from the adjusted model is included in Figure 3 for comparison. As seen, the change in the drain flow was mostly in the timing and not in the rate. Site Considerations for Selecting Model Simulation Approach As seen in Figure 2, the spike in NCCI's drain flow in June 2025 appears to coincide with a spike in groundwater levels that was recorded mainly just in the monitoring wells located on the southeast corner of the NCCI pit (Z5, Z6, and Z7). The rise in the other wells was more consistent with the typical annual spring-summer rise. There appears to be an east-west- oriented channel along the south side of the NCCI pit, along County Road 18, that presumably conveys water to the river that is released from the Coal Ridge Ditch Waste Reservoir. (That reservoir is located to the west of the map and is not shown.) Based on the MW locations that picked up the largest June 2025 spike, we presume there may have been a release down that channel at that time. MGE believes that level of year-specific and ditch-specific detail is outside of the scope of this modeling effort for many reasons, including public records not being readily accessible, if accessible at all, about internal ditch company operations. Similarly, this area has numerous other hydrologic features for which available data are limited or sporadic: Meadow Island Ditch, Lupton Bottoms Ditch, return-flow discharges periodically made through Little Dry Creek by the Brantner Ditch, plus apparent laterals and other water conveyance features. In MWE's opinion, that level of regional hydrologic complexity and limited public records means it Miller Groundwater Engineering, LLC Page 13 DENNIS MCGRANE NCCI GRAVEL MINE-PROPOSED EXPANSION NOVEMBER 14,2025 is beyond the scope of NCCI's model to simulate all details of field observations. Nevertheless, MGE believes the reasonableness of this model is still affirmed by it successfully projecting the range of now-observed drain flows. The complexity of having multiple ditches operating in the area mainly affects hydrologic inputs that would be assigned to a given simulation, such as the dates on which a given ditch or ditches in the area start and stop a given diversion or return-flow release. Such changes in hydrologic timing inputs do not affect aquifer properties such as permeability. For these reasons, it is MGE's opinion that while the model needs to reasonably represent overall observations—such as the range of heads from south to north across the subject area—it does not need to simulate short-scale variations that will be seen in detailed site data such as the daily variations in drain flow (Figure 2) or minor variations in ditch start up dates from year to year. These conditions and this opinion have guided MGE's approach to this model update. MGE reviewed the new water level data in the NCCI expansion area and elected to make a few adjustments to the timing and scale of hydrologic inputs in order to assess the model's ability to match the new data in the expansion area and to represent the overall regional gradient that is documented by NCCI's 11 monitoring points. The following adjustments were made: (i) increased net natural recharge across the area to 0.75 inches/year (a common value for the region) to raise modeled water levels in the expansion area toward observed levels; (ii) added a pond downstream and to the northeast of monitoring well G4 which is assumed to have silty side walls and thereby raises water levels upstream of it; (iii) increased seasonal recharge for portions of the Meadow Island and Lupton Bottoms ditches near NCCI; (iv) used MODFLOW's "Drain" package to represent a surface drainage feature seen in aerial photos in an area with shallow groundwater located one mile south of the NCCI pit; and (v) adjusted the start and top times of the model stress periods representing the irrigation season cycles in 2023, 2024, and 2025. The calibration to the Z-series of monitoring wells (older MWs) was reasonable without these water input changes, but calibration for the G-series wells in the expansion was improved with these changes. The adjusted model's drain discharge is compared to the drain's measured flows in Figure 3. The adjusted model's groundwater level output is compared against NCCI's field observations in Figures 4 through 7. In that series of figures, the furthest upstream monitoring wells, such as Z1 (red) and Z2 (blue), plus the furthest downstream monitoring well G-4 (magenta) are repeated in each figure to provide context for the range of heads being targeted from south to Miller Groundwater Engineering, LLC 1' <1 4 DENNIS MCGRANE NCCI GRAVEL MINE-PROPOSED EXPANSION NOVEMBER 14,2025 north across the NCCI mining areas. The mid-range monitoring wells are then highlighted in turn in the subsequent figures from Z-3 (yellow, Figure 4) to Z-4 (green, Figure 5), G-1 and G-2 (black and orange, Figure 6), and finally to G-5 (purple, Figure 7). Evaluation of New Mine Pits NCCI expects their expansion will occur before the new Heinz pits are started. We therefore considered two future scenarios: Case 1 is the addition of only NCCI's expansion, and Case 2 is the addition of the two Heinz pits after the NCCI expansion is in place. Case 1 includes the small Northeast Pit to be located immediately southwest of G4 (Figure 1) which will not have a slurry wall but which will be backfilled after mining with fine materials and overburden soils. A zone of lower permeability was added to the model at the Northeast Pit to represent that future change. For both Case 1 and Case 2, the baseline condition used for comparison is the model of current conditions in 2025. Late summer was the time selected for all comparisons since that period has the highest groundwater levels. Figures 8, 9, and 10 show the modeled water table elevations for the Baseline Case, Case 1, and Case 2, respectively. Figure 11 is a contour map showing the change in groundwater levels between Case 1 and the baseline, i.e., the difference between the water table conditions in Figures 8 and 9. Likewise, Figure 12 shows the difference between Case 2 and the baseline (current conditions). In Figures 11 and 12, a computed rise is shown with blue contour lines and a computed decline is shown with red lines. Discussion of Results Case 1 Observations The model-estimated changes in Case 1 immediately around the NCCI expansion are small, with near-zero change along the southeast side and a decline of 1.0 to 0.5 feet to the northwest (Figure 11). This projection of a small change is reasonable because the gradient across the expansion area is already relatively flat (Figure 8) due to being in the shadow of the existing NCCI pit. The NCCI subdrain contributes to this flat gradient as well. No significant change in water levels is computed by the model along the existing NCCI drain (Figure 11) and no meaningful increase in NCCI drain flow was predicted. Miller Groundwater Engineering, LLC Page 15 DENNIS MCGRANE NCCI GRAVEL MINE-PROPOSED EXPANSION NOVEMBER 14,2025 Since groundwater water levels are projected to decrease on the west side of the NCCI expansion area, we see no reason to extend the NCCI drain at this time. However, actual conditions are influenced by multiple regional factors that may not be fully captured in a groundwater model and therefore MGE recommends monitoring of this area before, during, and after construction of the slurry wall for the expansion area. The larger changes seen in Case 1 (Figure 11) are a shadow caused by the future Northeast Pit near monitoring well G4. The shadow of that backfilled pit is made stronger due to this simulation expecting the Northeast Pit to reduce seepage from the Meadow Island ditch which previously flowed to the northeast at this location. That ditch seepage is expected to be reduced because the canal is very close to the upgradient side of the future Northeast Pit and therefore the canal's leakage will cause the water table to rise under the canal toward the ditch bottom. That shallower water table itself reduces the leakage rate relative to prior rates over a deeper water table. As noted, a groundwater rise is to be expected along the Meadow Island ditch between NCCI's Northeast Pit and NCCI's expansion pit slurry wall. There is model uncertainty about the degree of rise, but physically it is reasonable to expect the groundwater levels between the Northeast Pit and the expansion area slurry wall along the ditch to approach the water surface elevation in the ditch over time while the ditch is conveying water. Due to being constrained between the future slurry wall and the Northeast Pit, groundwater may also linger for some period of time, near the ditch bottom elevation, after the ditch is shut off. This area may need to be monitored if a water table elevation near the ditch water level would present a concern. Case 2 Observations Modeled water levels along the west side of the NCCI expansion are expected to be similar between Case 2 (Figure 12) and Case 1, with the same small shadow created by the NCCI expansion slurry wall. Likewise, no significant change in the NCCI drain flow is indicated by the model for Case 2 and we see no reason to extend the drain further north at this time. Monitoring may be advisable for that area to determine if any other reason to extend the drain may develop in the future, such as under different conditions than known and simulated here. A larger shadow is projected downstream of the new Heinz pits (Figure 12), in part because they are very large pits. Additionally, similar to the scenario between NCCI expansion slurry wall and the Northeast Pit, the two Heinz pits are expected to constrain and reduce seepage from the Meadow Island ditch. Seepage from that section of the ditch will be constrained in a narrow alley between the two Heinz cells. This has the effect of reducing seepage losses from Miller Groundwater Engineering, LLC Page 16 DENNIS MCGRANE NCCI GRAVEL MINE-PROPOSED EXPANSION NOVEMBER 14,2025 the ditch as the water table rises to meet the water level along the ditch bottom. The water level may rise to be at or near the water level elevation in the ditch. If an increased water table elevation in this area, at or near the ditch elevation, would present a problem or concern, then monitoring is recommended for this area. Additional Observation The modeled range for NCCI drain discharge for the observation period was about 1 to 4 cfs (Figure 3). However, it was indicated in various model sensitivity runs that the modeled drain discharge could be as high as 5 cfs in a year with conditions similar to 2023 or 2024. Summary and General Recommendations NCCI's Spring 2024 model accurately forecasted the range of discharge rates that were measured from the NCCI drain in 2025 after its installation in Fall 2024. However, the June 2025 spike in drain discharge (to 4 cfs) may have been caused by factors not included in the model, such as release from the Coal Ridge Ditch Waste Reservoir. Although NCCI's Spring 2024 model successfully simulated the measured 2025 drain discharge rates, MGE made a few adjustments to the model to better align modeled water levels in the NCCI expansion area with the new monitoring data now available in that area. The adjusted model reasonably matches the range of water levels observed across the existing and proposed NCCI mine areas. No significant change in NCCI's drain discharge is indicated by these model simulations for the NCCI expansion or for the new Heinz pits. No significant change in water levels is indicated along the west side of the existing NCCI clay liner in either case. A small decline in groundwater levels is indicated along the west side of the expansion slurry wall. However, actual conditions may vary due to other factors such as changes in Little Dry Creek or changes in the Lupton Bottoms Ditch which a model cannot foresee. Monitoring in this area is recommended if a change in water levels, different than what is projected, would present a concern to NCCI or to DRMS. A larger decline in groundwater levels is expected down-gradient of the new Heinz pits due to their size and due to the two pits constraining and blocking normal seepage from the Meadow Island Ditch. Miller Groundwater Engineering, LLC Page 17 DENNIS MCGRANE NCCI GRAVEL MINE-PROPOSED EXPANSION NOVEMBER 14,2025 Seepage from the Meadow Island Ditch will likely be constrained between the two Heinz pits and also between NCCI's expansion slurry wall and NCCI's backfilled Northeast Pit. This scenario is not unlike a mounding condition on the upgradient side of a lined gravel pit. Although this constraint will reduce ditch seepage overall, that reduction is caused by the water table rising to meet the ditch bottom and/or ditch water levels while the ditch is running. There is uncertainty about exactly how much rise will occur under and along the ditch between the new pits, but a rise is likely. If a rise in groundwater levels toward the surface level of the ditch is a concern, then monitoring is recommended for those areas. It is MGE's opinion that this model is well founded and provides reasonably reliable guidance for expected conditions. However, it must be noted that there are inherent uncertainties in this setting because there are multiple surface water influences, including many artificial ones (irrigation infrastructure). Monitoring is recommended to track actual field conditions. It is MGE's opinion that this model has an appropriate level of calibration and an appropriate level of seasonal-timing detail for its intended purposes. When paired with monitoring, the model is suitable for its purposes. If in the future NCCI or DRMS wish to see more detail or a more elaborate calibration, then MGE recommends that first more detailed records need to be created and provided for the operations of the numerous surface water features and ditches in the area. -- End of Memo-- Miller Groundwater Engineering, LLC Page 18 Table 1. Monitoring well data around existing NCCI pit. Zadal PT Off-site lob nitorirg Wel Is Pemmet=_rNvnber MWZI MW-Z2 MWZ3 NMfZ9 MW-Z5 MW-ZS MWZ7 Ground Surface Elevation(410 4870.33 4870.66 4862.43 9962.97 9869.99 4269.76 988.93 Top of PVC Elevation(fl)ro 4869.73 9870 OS 4862.14 4862.72 4869.24 4869.47 480339 Depth to Depth of Water Depth to Depth of Water Depth to Depth of Water Depth to Depth of Water Depth to Depth of Water Depth to Depth of Water Depth to Depth of Water Date of Measurement water from aterfrom Surfer, ohange(ft( waterfrom water from Surface ohange(R1 water from water from Surface ohange(ft1 waterfrom waterfrom Surface Change(R1 water from water from Surface ohange(ft1 waterfrom water from Surface oh.ge(A( waterfrom water from Surface ohano ft) top of PVC wGround Elevation top of PVC Ground Elevation top of PVC Ground top of PVC Ground top of PVC Ground top of PVC Ground top of PVC Ground (ft) Surface(ft) (ft) (ft) Surface(ft) (ft) (ft) Surface(ft)Elevation(ft) (ft) Surface(ft) Ele.ation(R) (ft) Surface(6)Elevation(ft) (ft) Surface(ft) Elevation)A) (ft) Surface(ft)Elevation(ft) 6/27/2023 1.40 2.00 9368.33 1.92 2.03 2.63 9368.02 2.05 7.15 7.44 4359.93 2.73 7.10 735 9855.62 6.36 4.27 9.52 4364.97 7.22 9.10 9.39 4865.37 6.18 2.87 341 9365.52 5.53 2/21/2023 0.60 120 43E9.13 080 1.04 1.64 4369.01 099 3.33 367 4358.76 3.77 670 6.95 48E602 040 5.30 555 4363.94 (1.03) 499 5.18 486458 (0.79) 3.25 379 4365.14 (0_33) 9/11/2023 0.45 1.05 112E9.23 015 0.75 1.35 4369.30 029 317 346 4358.97 0.21 676 701 48E596 (0.061 E.25 650 4362.99 (0.95) 575 6.04 486372 (08E) 4.05 459 93E434 (020) 10/18/2023 0.50 1.10 9869.23 (0.05) 0.90 1.50 4369.15 (0.15) 3.22 3.51 4358.92 (0.05) 7.15 7.40 9855.57 (0.39) 5.78 6.03 4363.46 0.47 5.39 5.83 4964.08 0.36 3.81 435 11864.58 0.24 11/13/2023 1.02 1.62 98371 (0.52) 1.45 2.25 438360 (0.55) 718 7.43 985554 (0.03) 6.53 678 4362.71 (0.75) 604 6.33 488343 (0.65) 4.42 496 963.97 (0.61) 12/13/2023 1.52 2.12 4383.21 (0.50) 2.07 2.67 4367.98 (0.62) 4.15 4.44 4357.99 (0.93) 7.30 755 4.955.42 (0.12) 7.09 7.34 4362.15 (0.56) 6.50 6.79 9862.97 (0.46) 4.82 5.36 4363.57 (0.40) 1/9/2024 1.80 2.40 9867.93 (0.22) 2.40 3.00 4367.65 (0.33) 4.25 4.54 4357.89 (0.10) 7.35 760 4.955.37 (0.05) 7.37 7.62 4361.27 (0.23) 6.73 7.02 9862.74 (0.23) 5.01 5.55 4363.33 (0.19) 2/5/2024 1.97 2.57 9367.76 (0.17) 2.61 3.21 4367.99 (0.21) 4.22 4.51 4357.92 0.03 7.97 772 4855.25 (0.12) 7.52 7.77 4361.72 (0.15) 6.76 7.05 9862.71 (0.03) 5.01 5.55 4363.33 0.00 3/6/2024 2.22 2.82 9367.51 (0.25) 2.87 3.97 4367.18 (0.26) 4.31 4.60 4357.83 (0.09) 7.35 760 4855.37 0.12 7.32 7.57 4361.92 0.20 6.72 7.01 9862.75 0.04 5.02 5.56 4363.37 (0.01) 4/16/2024 263 3.49 436685 (0.661 3.42 402 4366.63 (0.55) 4.10 439 4358.04 0.21 6.77 702 485E95 058 5.99 624 4363.25 133 5.50 5.79 4863.97 123 4.96 550 4363.43 0.0E 5/23/2024 1.49 2.09 4383.24 139 2.02 2.62 434303 140 2.95 324 4359.19 1.15 605 6.30 4856.67 072 4.95 520 4364.29 104 478 5.07 486469 0.72 3.32 386 436E07 1.64 6/21/2024 0.83 1.43 11883.90 0.66 1.25 185 4383.80 0.77 2.83 3.12 4359.31 0.12 6.13 6.33 4956.59 (0.08) 5.42 5.67 4363.82 (0.47) 5.18 5.47 986429 (0.40) 3.64 418 4364.75 (0.32) 7/2/2024 0.53 118 9869.15 025 1.00 1.60 4369.05 025 2.45 272 459.71 0.90 612 6.37 4856.60 001 5.44 570 4363.79 (0.03) 5.20 549 986427 (0.02) 3.70 424 4364.69 (0.06) 8/5/2024 0.90 1.00 9969.33 0.18 0.72 1.32 4369.33 0.28 2 95 3.24 9859.19 (0.52) 6.58 6.83 4.956.14 (0.461 5.32 5.57 4363.92 0.13 5.10 5.39 486437 0.10 3.59 413 4364.80 0.11 9/6/2024 0.13 0.73 969.60 0.27 0.50 110 4369.55 0.22 2.82 3.07 4.959.90 3.76 5.65 5.90 4363.59 (0.33) 6.68 6.97 9862.79 (1.58) 4.12 4.66 4364.27 (0.53) 9/16/2024 2.71 3.00 4353.43 0.24 10/40024 0.34 0.94 9369.39 (0.21) 0.68 1.28 4369.37 (0.18) 2 74 3.03 4353.40 0.03) 6.90 715 4855.32 (9.081 4.05 9.30 4365.19 1.60 5.57 5.86 9863.90 1.11 5.82 6.36 4362.57 (1.70) 11/12/2024 1.31 191 4383.42 (0.97) 196 2.56 436809 (1.28) 3 60 389 4358.54 086) 693 719 4855.72 (0.031 4.37 462 436427 (0.32) 587 6.16 4863.60 (0.30) E.13 6:67 4362.26 (0.31) 12/11/2024 283 3.43 4366.90 (1.52) 3.5E 415 4366.50 (1.59) 4.07 436 4358.07 0.47) 710 735 4855.62 (0.17) 5.90 615 4363.34 (1.53) 735 764 4862.12 (1.48) 7.93 812 436081 (1.45) 1/140025 3.74 4.34 4365.99 (0.91) 4.49 5.09 465.56 (0.94) 4.40 4.69 4357.74 0.33) 7.37 762 4855.35 (0.27) 6.55 680 4362.69 (0.65) 8.02 8.31 9861.45 (0.67) 8.20 8.74 460.19 (0.62) 2/5/2025 4.15 475 165.5 (0.41) 483 5.43 43.65.22 (0.34) 4.9 477 435766 0.43) 740 765 4855.32 (0.03) 6.75 700 4362.49 (0.20) 8.24 8.53 9861.23 (0.22) 8.45 899 4859.94 (0.25) 3/4r2025 4.44 5.04 965.29 (0.29) 5.20 580 4364.85 (0.37) 4.60 489 4357.54 0.12) 7.40 765 4.955.32 0.00 6.80 7.05 4362.44 (0.05) 8.23 8.52 4861.24 0.01 8.32 886 4360.07 0.13 4/25/2025 4.31 4.91 965.42 0.13 5.10 5.70 4364.95 0.10 4.05 4.34 4358.09 0.55 6.65 6.90 4956.07 0.75 6.50 6.75 4362.74 0.30 6.13 6.42 9863.34 2.10 4.59 5.13 463.80 3.73 5/28/2025 3.17 3.77 866.56 1.19 4.01 461 4366.09 1.09 3.90 3.69 4358.74 0.65 6.23 6.93 4256.49 0.42 5.07 5.32 4364.17 1.43 462 9.91 986485 1.51 3.54 4.08 4364.85 1.05 6/270025 2.31 2.91 9367.42 026 3.05 3.65 4367.00 0.96 2.97 3.26 4353.17 0.43 6.16 6.91 4256.56 0.07 No Read 3.98 3.77 9865.99 1.14 No Read 8/1/2025 3.06 366 43E6.E7 (0.75) 2.96 3.56 4367.09 009 3 50 379 4358.64 (0.53) 652 6.77 4856.20 (0.36) 5.61 526 4363.63 (0.54) 5.49 5.73 4863.98 (201) 3.95 449 4364.44 (0.41) 9/3/2025 2.05 2.65 43E7.83 101 2.75 3.35 4367.30 021 3.00 329 4359.14 0.50 659 684 485E.13 (0.07) 5.30 555 4363.94 0.31 585 6.14 4863.62 (0.36) 3.6E 419 4364.74 0:30. 10/8/2025 2.25 2.85 167.43 (0.20) 2.90 3.50 4867.15 (0.15) 2.96 3.25 4359.18 0.04 6.60 6.85 4856.12 (0.01) 5.70 5.95 4363.54 (0.40) 6.20 6.49 9863.27 (0.33) 4.10 4.64 4.964.29 (0.45) Max 444 514 4E6960 1.92 520 523 486955 2.05 7.15 744 485971 3.77 747 772 495.33 6.36 752 777 4805.14 7.22 8.24 853 4305E 6.18 845 8GB 420552 5.53 loin 0.13 0.73 486529 (1.52) 0.50 1 10 4954.85 (1.59) 2.43 272 4954.99 (0.93) 2.82 3.07 4355.25 (9.08) 405 4.30 4861.72 (1.53) 3.43 3.77 4361.23 (2.01) 2.87 3.41 4859.94 (1.70) Max Change 4.31 4.31 4.31 4.70 4.70 4.70 4.72 472 4.72 4.55 465 465 347 3.47 3.47 475 4.76 4.76 5.58 5.58 5.58 Average 1.92 2.52 436721 004 2.45 3.07 486759 004 3.68 3.97 4858.45 0.27 6.50 6.94 456.03 0.25 588 6.13 4863.36 0.22 5.94 623 4363.53 015 4.84 5.38 4953.55 0.17 'Elevations surveyed by Survey Syste r¢,Evergreen,Colorado(Jubr.2011). Page 18 Table 2. NCCI Pit 1 Expansion Area - Monitor Well Readings NCCI Pit 1 Expansion Area- Monitor Well Readings Well Designation G-1 G-2 G-4 G-5 Description _ Southwest Corner - Southeast Corner Northeast Corner - Northwest Corner Top of Well Elevation(ft) 4864.05 4865.06 4860.93 4858.21 Ground Elevation (ft) 4860.89 4861.44 4858.12 4855.29 Depth to Depth to Depth to ' Depth to Groundwater Depth to Groundwater Depth to Groundwater Depth to Groundwater Depth to from Top of Groundwater Elevation of from Top of Groundwater Elevation of from Top of Groundwater Elevation of from Top of Groundwater Elevation of Well from Ground Groundwater Well from Ground Groundwater Well from Ground Groundwater Well from Ground Groundwater Date (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) February 15,2024 7.38 4.22 4856.68 10.25 6.63 4854.81 8.67 5.86 4852.26 • 5.08 2.16 4853.13 March 13, 2024 7.25 4.09 4856.80 9.92 6.30 4855.14 8.42 5.61 4852.51 a 4.67 1.75 4853.54 April 19, 2024 7.17 4.01 4856.88 9.67 6.05 4855.39 8.17 5.36 4852.76 . 4.25 1.33 4853.96 May 15,2024 6.83 3.67 4857.22 9.25 5.63 4855.81 7.92 5.11 4853.01 3.92 1.00 4854.29 June 11, 2024 6.25 3.09 4857.80 8.42 4.80 4856.64 7.50 4.69 4853.43 a 3.17 0.25 4855.04 July 17,2024 a 6.00 2.84 4858.05 7.92 4.30 4857.14 6.92 4.11 4854.01 a 3.17 0.25 4855.04 August 13,2024 5.83 2.67 4858.22 7.75 4.13 4857.31 6.67 3.86 4854.26 a 3.00 0.08 4855.21 September 10,2024 6.08 _ 2.92 4857.97 7.83 4.21 4857.23 _ 7.08 4.27 _ 4853.85 3.25 0.33 4854.96 October 14, 2024 6.58 3.42 4857.47 8.67 5.05 4856.39 7.42 4.61 4853.51 3.75 0.83 4854.46 November 21,2024 7.00 3.84 4857.05 9.25 5.63 4855.81 7.67 4.86 4853.26 _ 4.08 1.16 4854.13 December 17,2024 7.33 4.17 4856.72 9.92 6.30 4855.14 8.25 5.44 4852.68 _ 4.33 1.41 4853.88 January 22,2025 a 7.67 4.51 4856.38 10.25 6.63 4854.81 9.17 6.36 4851.76 4.67 1.75 4853.54 February28,2025 7.58 4.42 4856.47 10.25 6.63 4854.81 8.75 5.94 4852.18 , 4.75 1.83 4853.46 March 18,2025 7.50 4.34 4856.55 10.00 6.38 4855.06 8.50 5.69 4852.43 4.58 1.66 4853.63 April 10, 2025 _ 7.33 4.17 4856.72 9.83 6.21 _ 4855.23 8.17 5.36 4852.76 a 4.42 1.50 4853.79 May 14,2025 a 6.58 3.42 4857.47 9.08 5.46 4855.98 8.00 5.19 4852.93 3.92 1.00 4854.29 June 13, 2025 6.08 2.92 4857.97 8.17 4.55 4856.89 7.83 5.02 4853.10 3.33 0.41 4854.88 July 25,2025 6.67 3.51 4857.38 9.25 5.63 4855.81 8.17 5.36 4852.76 3.83 0.91 4854.38 August 18,2025 6.25 3.09 4857.80 9.42 5.80 4855.64 8.50 5.69 4852.43 3.67 0.75 4854.54 October 25,2025 6.10 2.94 4857.95 9.30 5.68 4855.76 8.40 5.59 4852.53 3.70 0.78 4854.51 _ Minimum 5.83 2.67 4856.38 1 7.75 4.13 4854.81 6.67 3.86 4851.76 n 3.00 0.08 4853.13 Maximum 7.67 4.51 4858.22 10.25 6.63 4857.31 9.17 6.36 4854.26 • 5.08 2.16 4855.21 Average 6.77 3.61 4857.28 9.22 5.60 4855.84 8.01 5.20 4852.92 1 3.98 1.06 4854.23 Page 110 Table 3. Measured NCCI subdrain discharge. Table Page 1 of 11 Date Total AF per day Total Gallons per day 11/1/2024 0.17 53,765 11/2/2024 0.29 95,148 11/3/2024 0.21 67,125 11/4/2024 0.30 99,059 11/5/2024 0.70 227,118 11/6/2024 0.67 216,691 11/7/2024 0.63 204,309 11/8/2024 0.71 231,680 11/9/2024 0.82 267,850 11/10/2024 0.79 257,748 11/11/2024 0.62 200,398 11/12/2024 0.40 130,015 11/13/2024 0.49 158,364 11/14/2024 0.73 238,197 Drain Install Finished 11/15/2024 0.87 284,468 11/16/2024 0.96 313,469 11/17/2024 0.97 315,750 11/18/2024 1.09 353,548 11/19/2024 1.18 384,178 11/20/2024 1.18 385,482 11/21/2024 1.11 361,695 11/22/2024 1.11 362,998 11/23/2024 1.09 355,503 11/24/2024 1.09 355,503 11/25/2024 1.09 355,178 11/26/2024 1.14 372,122 11/27/2024 1.15 374,403 11/28/2024 1.17 379,616 11/29/2024 1.25 407,965 11/30/2024 1.23 399,819 0 Totals for 25.19 8,209,164 Month 111 Table 3. Measured NCCI subdrain discharge. Table Page 2 of 11 Date Total AF per day Total Gallons per day 12/1/2024 1.27 412,853 12/2/2024 1.50 487,147 12/3/2024 1.67 545,475 12/4/2024 1.69 550,362 12/5/2024 1.70 554,273 12/6/2024 1.68 548,733 12/7/2024 1.70 552,317 12/8/2024 1.78 579,037 12/9/2024 1.73 563,722 12/10/2024 1.66 539,935 12/11/2024 1.60 519,732 12/12/2024 1.67 542,868 12/13/2024 1.63 532,441 12/14/2024 1.55 506,047 12/15/2024 1.53 497,574 12/16/2024 1.54 501,811 12/17/2024 1.54 501,485 12/18/2024 1.50 488,125 12/19/2024 1.42 461,731 12/20/2024 1.40 455,214 12/21/2024 1.28 417,089 12/22/2024 1.29 419,370 12/23/2024 1.21 394,280 12/24/2024 1.21 394,280 12/25/2024 1.17 381,572 12/26/2024 1.12 363,650 12/27/2024 1.11 362,998 12/28/2024 1.12 364,627 12/29/2024 1.15 373,751 12/30/2024 1.21 394,280 12/31/2024 1.21 394,280 Totals for 44.81 14,601,057 Month Pa c 112 Table 3. Measured NCCI subdrain discharge. Table Page 3 of 11 Date Total AF per day Total Gallons per day 1/1/2025 1.21 394,280 1/2/2025 0.56 180,847 1/3/2025 0.56 180,847 1/4/2025 0.56 180,847 1/5/2025 0.56 180,847 1/6/2025 0.56 180,847 1/7/2025 0.56 180,847 1/8/2025 0.56 180,847 1/9/2025 0.56 180,847 1/10/2025 0.56 180,847 1/11/2025 0.57 185,409 1/12/2025 0.56 180,847 1/13/2025 0.56 182,802 1/14/2025 0.61 198,117 1/15/2025 0.64 206,915 1/16/2025 0.66 213,432 1/17/2025 0.66 213,432 1/18/2025 0.66 213,432 1/19/2025 0.69 225,163 1/20/2025 0.75 245,692 1/21/2025 - battery dead 1/22/2025 - battery dead 1/23/2025 - battery dead 1/24/2025 - battery dead 1/25/2025 - battery dead 1/26/2025 - battery dead 1/27/2025 - battery dead 1/28/2025 - battery dead 1/29/2025 - battery dead 1/30/2025 - battery dead 1/31/2025 0 battery dead Totals for 12.54 4,087,149 Month Pa g e 113 Table 3. Measured NCCI subdrain discharge. Table Page 4 of 11 Date Total AF per day Total Gallons per day 2/1/2025 - Battery Dead 2/2/2025 - Battery Dead 2/3/2025 - Battery Dead 2/4/2025 - Battery Dead 2/5/2025 - Battery Dead 2/6/2025 - Battery Dead 2/7/2025 - Battery Dead 2/8/2025 - Battery Dead 2/9/2025 - Battery Dead 2/10/2025 - Battery Dead 2/11/2025 - Battery Dead 2/12/2025 - Battery Dead 2/13/2025 - Battery Dead 2/14/2025 - Battery Dead 2/15/2025 - Battery Dead 2/16/2025 - Battery Dead 2/17/2025 - Battery Dead 2/18/2025 - Battery Dead 2/19/2025 - Battery Dead 2/20/2025 - Battery Dead 2/21/2025 0.78 254,164 2/22/2025 0.81 262,310 2/23/2025 0.90 294,243 2/24/2025 0.97 316,727 2/25/2025 0.89 290,659 2/26/2025 0.85 277,951 2/27/2025 0.90 293,592 2/28/2025 0.97 316,727 0 Totals for 7.08 2,306,373 Month Pa g e 114 Table 3. Measured NCCI subdrain discharge. Table Page 5 of 11 Date Total AF per day Total Gallons per day 3/1/2025 0.97 316,727 3/2/2025 0.97 316,401 3/3/2025 0.97 317,379 3/4/2025 0.98 319,008 3/5/2025 0.97 316,727 3/6/2025 0.96 312,491 3/7/2025 0.81 262,962 3/8/2025 0.75 245,692 3/9/2025 0.69 226,141 3/10/2025 0.98 319,660 3/11/2025 1.31 425,561 3/12/2025 1.21 394,280 3/13/2025 1.00 325,199 3/14/2025 0.56 180,847 3/15/2025 0.56 180,847 3/16/2025 0.56 180,847 3/17/2025 0.56 180,847 3/18/2025 0.57 185,735 3/19/2025 0.56 181,499 3/20/2025 0.61 198,443 3/21/2025 0.72 234,613 3/22/2025 0.94 305,648 3/23/2025 1.16 377,010 3/24/2025 0.90 292,614 3/25/2025 0.77 249,928 3/26/2025 0.79 258,074 3/27/2025 0.82 267,198 3/28/2025 0.86 280,232 3/29/2025 0.86 281,209 3/30/2025 1.09 356,481 3/31/2025 1.16 377,335 Totals for 26.60 8,667,637 Month P <t !> c15 Table 3. Measured NCCI subdrain discharge. Table Page 6 of 11 Date Total AF per day Total Gallons per day 4/1/2025 1.21 394,280 4/2/2025 1.31 426,213 4/3/2025 1.43 466,619 4/4/2025 1.53 496,923 4/5/2025 1.52 493,664 4/6/2025 1.14 372,122 4/7/2025 1.19 386,459 4/8/2025 1.26 409,269 4/9/2025 1.34 437,944 4/10/2025 1.45 472,810 4/11/2025 1.55 506,372 4/12/2025 1.55 505,395 4/13/2025 1.40 456,191 4/14/2025 1.32 428,820 4/15/2025 1.42 461,731 4/16/2025 1.50 489,754 4/17/2025 1.42 464,012 4/18/2025 1.45 471,832 4/19/2025 1.51 490,406 4/20/2025 1.52 495,619 4/21/2025 1.48 482,259 4/22/2025 1.34 435,011 4/23/2025 1.25 408,617 4/24/2025 1.27 414,157 4/25/2025 1.88 610,971 4/26/2025 2.36 767,379 4/27/2025 2.66 868,067 4/28/2025 2.85 929,001 4/29/2025 2.91 947,575 4/30/2025 3.01 981,463 0 Totals for 49.01 15,970,935 Month 116 Table 3. Measured NCCI subdrain discharge. Table Page 7 of 11 Date Total AF per day Total Gallons per day 5/1/2025 3.12 1,017,307 5/2/2025 3.32 1,081,499 1 5/3/2025 3.56 1,161,007 5/4/2025 3.62 1,180,232 5/5/2025 3.62 1,178,929 5/6/2025 3.50 1,140,153 5/7/2025 3.52 1,147,973 5/8/2025 3.05 993,520 5/9/2025 3.10 1,009,161 5/10/2025 3.15 1,027,408 5/11/2025 3.31 1,077,263 5/12/2025 3.41 1,109,523 5/13/2025 3.47 1,130,377 5/14/2025 3.02 984,070 5/15/2025 3.20 1,041,420 5/16/2025 3.58 1,166,221 5/17/2025 3.54 1,152,861 5/18/2025 3.49 1,135,917 5/19/2025 4.00 1,304,056 5/20/2025 2.58 839,392 5/21/2025 2.39 779,110 5/22/2025 1.98 646,488 5/23/2025 1.81 588,161 5/24/2025 1.77 575,127 5/25/2025 2.12 690,152 5/26/2025 2.57 837,437 5/27/2025 2.36 767,705 5/28/2025 2.03 661,803 5/29/2025 1.91 620,746 5/30/2025 1.93 627,263 5/31/2025 2.27 738,053 Totals for 90.26 29,410,334 Month 117 Table 3. Measured NCCI subdrain discharge. Table Page 8 of 11 Date Total AF per day Total Gallons per day 6/1/2025 3.38 1,101,376 6/2/2025 3.78 1,232,368 6/3/2025 4.00 1,304,707 6/4/2025 5.19 1,690,515 6/5/2025 4.70 1,531,174 6/6/2025 3.87 1,262,021 6/7/2025 3.81 1,241,492 6/8/2025 3.89 1,267,560 6/9/2025 4.28 1,393,991 6/10/2025 5.76 1,875,273 6/11/2025 7.79 2,537,402 6/12/2025 6.18 2,014,085 6/13/2025 4.62 1,505,106 6/14/2025 4.68 1,526,286 6/15/2025 4.67 1,520,421 6/16/2025 4.61 1,502,825 6/17/2025 4.61 1,502,825 6/18/2025 4.13 1,346,742 6/19/2025 3.15 1,026,431 6/20/2025 3.33 1,085,736 6/21/2025 3.03 987,003 6/22/2025 3.01 982,115 6/23/2025 3.61 1,176,322 6/24/2025 3.83 1,248,335 6/25/2025 4.07 1,326,539 6/26/2025 3.91 1,275,055 6/27/2025 4.22 1,373,462 6/28/2025 4.48 1,460,790 6/29/2025 4.09 1,332,079 6/30/2025 3.92 1,278,639 0 Totals for 128.61 41,908,675 Month 118 Table 3. Measured NCCI subdrain discharge. Table Page 9 of 11 Date Total AF per day Total Gallons per day 7/1/2025 3.67 1,196,199 7/2/2025 3.76 1,223,896 7/3/2025 3.64 1,186,749 7/4/2025 3.36 1,093,230 7/5/2025 2.93 953,766 7/6/2025 2.44 795,402 7/7/2025 2.36 768,357 7/8/2025 2.45 798,335 7/9/2025 2.46 800,942 7/10/2025 2.40 780,739 7/11/2025 2.15 699,602 7/12/2025 2.03 661,478 7/13/2025 1.95 634,106 7/14/2025 2.16 704,490 i 7/15/2025 2.32 757,278 7/16/2025 2.35 764,121 7/17/2025 2.32 754,671 7/18/2025 2.85 928,024 7/19/2025 3.51 1,143,085 7/20/2025 3.20 1,041,746 7/21/2025 2.70 879,472 7/22/2025 2.36 769,008 7/23/2025 2.15 698,950 7/24/2025 2.08 678,748 7/25/2025 2.11 688,849 7/26/2025 2.31 751,738 7/27/2025 2.57 838,415 7/28/2025 2.75 895,113 7/29/2025 2.12 689,827 7/30/2025 1.92 626,611 7/31/2025 1.77 577,408 Totals for 79.12 25,780,354 Month 19 Table 3. Measured NCCI subdrain discharge. Table Page 10 of 11 Date Total AF per day Total Gallons per day 8/1/2025 1.82 591,745 8/2/2025 1.84 598,262 8/3/2025 1.80 586,858 8/4/2025 1.92 626,937 8/5/2025 1.91 621,072 8/6/2025 1.91 621,398 8/7/2025 2.12 690,152 8/8/2025 2.68 873,607 8/9/2025 2.51 818,538 8/10/2025 1.06 345,076 8/11/2025 0.88 286,097 8/12/2025 1.83 597,611 8/13/2025 1.62 526,249 8/14/2025 1.67 543,519 8/15/2025 1.82 593,701 8/16/2025 2.09 682,332 8/17/2025 2.14 696,018 8/18/2025 1.92 626,611 8/19/2025 1.90 618,139 8/20/2025 1.87 609,341 8/21/2025 1.94 633,128 8/22/2025 2.23 726,322 8/23/2025 2.42 787,582 8/24/2025 2.73 889,247 8/25/2025 2.69 876,539 8/26/2025 2.42 789,211 8/27/2025 2.15 699,602 8/28/2025 2.06 672,231 8/29/2025 2.06 672,231 8/30/2025 2.01 654,309 8/31/2025 2.56 835,156 Totals for 62.57 20,388,823 Month Pa c 20 Table 3. Measured NCCI subdrain discharge. Table Page 11 of 11 Date Total AF per day Total Gallons per day 9/1/2025 3.04 989,609 9/2/2025 2.82 917,922 9/3/2025 2.61 849,494 9/4/2025 2.52 820,167 9/5/2025 - 9/6/2025 - 9/7/2025 - 9/8/2025 - 9/9/2025 - 9/10/2025 - 9/11/2025 - 9/12/2025 - 9/13/2025 - 9/14/2025 - 9/15/2025 - 9/16/2025 - 9/17/2025 - 9/18/2025 - 9/19/2025 - 9/20/2025 - 9/21/2025 - 9/22/2025 - 9/23/2025 - 9/24/2025 - 9/25/2025 - 9/26/2025 - 9/27/2025 - 9/28/2025 - 9/29/2025 - 9/30/2025 - Totals for 10.98 3,577,192 Month P „ c 21 Figure 1. NCCI and Heinz gravel mines northwest of Fort Lupton, Colorado. 4 ' 1 ( 1 y_ am IF •i 0\ 1,, 4" — ,11 4, '�. tN174)Ij' r O ,' " - tt tiY•V. G y 5 A 1 i , \ 1 . - Y v V - . it ,. 1,:f0.1w. tiriti ' ,. CD • ! P. 't, A - ' .,•• • x. 4 . N o L 'NE pit i `� .. .. v- f l t� c � ;( nes), . ,� . Oo c. NcCI '.** t . • . 'T�.. ' �:, • "q`-, '' II N fines 'pa7ision �� i area;; - ��' ai c felt' -a Irrywall ' ,,,,.. 1 4 ' "- N '�• C' NCCI x % C o ‘\ v, current - r L o 5 •It O co '' C N �" lined) . �y sfi + �c t, N o C IF O + t . Z 1 _ 2.. +_ t '�. f c) ...01 ' T ' Tit , _A� yi� , � I' . ;. • ., 1 to , �'• . 00 :a ii,: j , 3,185,000 3,186,000 3,187,000 3,188,000 3,189,000 3,190,000 3,191,000 easting (State Plane, feet) Page 122 Project: NCCI pit expansion-groundwater evaluation 2025 Figure 2. NCC Pit 2024-2025 Monitoring Data - water levels and drain discharge. MW-Z1 4872 - - - - 10 4871 - - - --- MW-Z2 4870 f -- — -- — — - 4869 { — . - • 9 -----MW Z3 4868 - A -`��♦ • - ♦ sii MW-Z4 44. 4867 - -- -- — 4866 -- - ♦��` • 8 MW-Z5 4865 — •.........I -- 4864 ---. 11k1111wow �` - MW Z6 4863 - / - - • 7 4862 A -- - — MW-Z7 " 4861 - - j I - 4860 - / i - • 6 N G-1 Ce LLg', 4857 —cj - ;-_mom •• 5 3 - . -G-4 v 4856 c I Li • 4854 - — - — - •••• 0. • •. •••• • 4 ` co ••• I , **•■■■*••• g 4853 — • ♦ . -- drain flow i • 4852 - - — • i ' - — 4851 -- — — • 3 4850 4849 - — — - - 4848 - - • 2 4847 - - 'N ' Iii 4846 — — — — -- — y - 4845 — — — • 1 4844 — — — -- rir - - 4843 4842 r 0 I--` A V N N A V N N A V N I- F-� N N \ F-` N F-` \ \ I--` N \ \ F' \ \ \ I-` W \ \ F-` W N N N N N N N N N N O O O N O O O NJ O 0 N N N N O N NJ NJ O N N N O N W W W W A A A A 0 Ui NJ o Page 23 A to Date Figure 3. NCCI Pit- Drain flows estimates over time (Models 2020;T7drn-2024;&T7drn-2025) 6.00 5.75 Observed Drain Flow 5.50 Modeled Drain Flow(Generic Year;Planned Drain) 5.25 _____Modeled Drain Flow(Generic Year;As-Built Drain) 5.00 original scoping model drain 4.75 •As-Built Drain;2025-Adjusted Model 4.50 4.25 4.00 3.75 3.50 /" r r �'� i , r u 3.25 / // i ; s [ i ; i i i I j 1 I l I r i 1 1 / 03.00 / / i i ► / I i I i E 2.75 i 8 2.50 . i I 2.25 1 I 2.00 1 1.75 i }1 1 1 1 1.50 1 ' I I I I i i i 1.25 i i i i ; i i I I , I I I 1.00 c I I I I I I I I I % I I 3 I,, i ® I 0.75 ` I • " • ` ` ` ''.....—lit 0.50I --i i 0.25 0.00 fl, > E O v > E O 0 > ' O O > E O i, > E O v > E O 0 > O O > O fl, > O v T. 0 .7 — n -s -6 — rn-r (D -6 — rn-r fD -6 — 16 — rn-r -, -O — rn+ (D . — rn-r D .f — rn-r 16 — n -, -6 — rn+ (D Time of Year Page 124 Figure 4.Approximate transient calibration to range of water levels across NCCI area,Set 1. 4875 4874 • Z-1(data) 4873 4872 Z-1(model) 4871 - 4870 - • Z-2(data) 4869 • • • ♦ 4868 / $ g 8 g = $ — — —Z-2(model) 4867 = 1_ • 4866 O o • Z-3(data) 4865 Q 4 ® • 4864 • ♦• • p • • 8 O © • ` ♦ . Z-3(model) 4863 • ♦ • 0 Q� • ♦ , � � i ` - - ® ♦ • • • O — — Q Q ♦ . ♦ ♦i :: -- — ♦ i ® • � � ♦ Z-5(data) i 0 4860 •♦ — — -Z-5(model) 4859 x x x w 4858 -z - x x - • Z-6(data) x x x 4857 74, k........,_ r 4856 -Z-6(model) 4855 " « - r 4854 -, G5 G4 i • • Z-7(data) � � 4853 ` I �- ♦ ♦ ♦ • ♦ ♦ ♦♦♦ ♦ ♦ _ _ .Z 7(model) 4852A 1 4851 - :••. - ' 4850 , y - , 1 — • G-4(data) 4849 !� - ; c! • wf s-..., -G-4(model) 4848 r • 4847 4; . 4846 n t , *; _ . •4'r r 31 4845 Jan-2023 Apr-2023 Jul-2023 Oct-2023 Jan-2024 Apr-2024 Jul-2024 Oct-2024 Jan-2025 Apr-2025 Jul-2025 Oct-2025 Jan-2026 Date I Page 125 Figure 5.Approximate transient calibration to range of water levels across NCCI area,Set 2. 4875 4874 • Z-1(data) 4873 4872 Z-1(model) 4871 4870 - • Z-2(data) 4869 • • • ♦ 4868 - ! $ _ $ — — —Z-2(model) 4867 = • 4866 • • • Z-4(data) 4865 i 0 ®® � • . ♦� ♦ 0 0 •♦ ♦ _ _ ®® • 4864 ♦ • 0 • 0 • • ♦ i $ Z-4(model) ♦ • • • • ® • ♦ ♦ ♦ ♦ 4862 _ ♦ i ® • � _ _ • Z-5(data) 1) 4 � � � ® ♦ ♦ ice ' • ♦ � � � 7M v 4861 i 0 4860 ♦ • ♦ — — -Z-5(model) 4859 w 4858 • Z-6(data) 4857 • •• • • 4856 •• • • • • • Z-6(model) • 4855 • • • • • • • • • • 4854 f ' -G5 /+ G4+ •, • • Z-7(data) • 4853 , t, ♦ ♦ ♦ ♦ — — -Z-7(model) 4852 ' 1 • 4851 - } T i`24 ' Page 3 4850 . >_ ••, ', , • G-4(data) 4849 •-T �� 4848 r G 4(model) 4847 - �. 4846 - Z 2L 1 �,t t _ *; , 4845 A. ti• } Jan-2023 Apr-2023 Jul-2023 Oct-2023 Jan-2024 Apr-2024 Jul-2024 Oct-2024 Jan-2025 Apr-2025 Jul-2025 Oct-2025 Jan-2026 Date Page 126 Figure 6.Approximate transient calibration to range of water levels across NCCI area,Set 3. 4875 4874 • Z-1(data) 4873 Z-1(model) 4872 4871 • Z-2(data) 4870 0. 4869 • �• • • — — —Z 2(model) 4868 - � i $ , $ _ $ _ 4867 $ _ .--. ♦ Z 5(data) 4866 • 4865 i 4 p ♦` ♦ $ •_ • ® ® 2 ` — ; i:: 4i• * ♦ ♦ _ • • • • ^ 4862 ♦ ® • •♦ i — ♦ • • • ► ._ -. �Z-6(model) v 4861 i • Z-7(data) 0 4860 • ♦ ♦ 4859 — — �, -Z-7(model) w 4858 • • • • • • • 4857 111111.1111111111 • • • • • • • • • • G-1(data) 4856 • • • 4855 • • •• • \ G-1(model) 4854 r I-ri , :ear • • G-2(data)4853 A -- )tr L+-~ ,K R. ♦ • 4852 `' - is. G-2(model) 4851 � l3 s , Z4 Ricci 4850 , r __n .\ • G-4(data) 4849 s T 4848 I G-4(model) 4847 ; + 4846 Z 2 � L i + __ Z 4845 ..+ , 3-1 Jan-2023 Apr-2023 Jul-2023 Oct-2023 Jan-2024 Apr-2024 Jul-2024 Oct-2024 Jan-2025 Apr-2025 Jul-2025 Oct-2025 Jan-2026 Date Page 127 Figure 7.Approximate transient calibration to range of water levels across NCCI area,Set 4. 4875 4874 • Z-1(data) 4873 4872 Z-1(model) 4871 4870 • • Z-2(data) • 4869 • •• • 4868 - ! $ •_ $ — — —Z-2(model) •4867 $ _ • 4866 • • • Z-5(data) 4865 Q 4 ®® ♦♦ ♦ ♦ _ _ • ♦ • 4864 ♦♦` ♦•: • p` • + • ♦ i $ • — — -Z-5(model) 4863 ♦ ♦ • � � — ♦ • � , i 4862 — ♦ ♦ ®• • •♦ _ ® ® • ♦ ♦ ♦ ♦ = • Z-6(data) 4861 • 0 4860 ♦ ♦ ♦ Z-6(model) 4859 w 4858 • Z-7(data) 4857 4856 — — -Z-7(model) 4855 X 4854 �G5 G4 X X ♦ ♦ X X X X X ♦ G4(data) • 1 X 4853 - )If r'•--14s i� X X ♦ ♦ ♦ X X X ♦ ♦ ♦ • ♦♦ ♦ • G 4(model) 4852 `:„` `G l 4851 Z3J " . ;44 wet X G-5(data) 4850 ....,.i.. pity 4849 ' (—--..-f 4' G-5(model) 4848 L 4847 I ,, : Z 2 ? '' 1 4845 ,' - -- ,...4. 1.4 Jan-2023 Apr-2023 Jul-2023 Oct-2023 Jan-2024 Apr-2024 Jul-2024 Oct-2024 Jan-2025 Apr-2025 Jul-2025 Oct-2025 Jan-2026 Date Page 128 Figure 8. Modeled groundwater elevations for baseline case (current conditions). / ,. " arI. '' or.,.}..,a, ! . I'raT , ` •�, — . . s O O n♦z Iiik ... , tt : N °'. --- - may• .. -r' ",'- .{ il RI ..",... • 4;-'' , . + ''''''It•.:......::....iti 4i,.- . ....\„). 48 7.141' ka. BSp \�.. iv N t1' i l S. ♦ ', • it ...\ , ,* /1, .4.1i1 ' , ,,,,.......a.1■"-- .• • O -tM fib'G (.0 -- .' . s1:•- - L.— 40\400 1 2 • -1 6 , 1 60 V r 4 r- ^i O te __ � (J Y 1 r. tir .....,, ' kik...'''i. 'if:: .1 :k\ ; A . ,5rd,.„-3_ _. r. t-a meib-i w' i i . -.1;c't,_-_.i""lt l ,i'... .1,_,At'8' • 4 r 3,185,000 3,186,000 3,187,000 3,188,000 3,189,000 3,190,000 3,191,000 easting (State Plane, feet) Sn P a LL 29 Project: NCCI pit expansion-groundwater evaluation 2025 Figure 9. Modeled groundwater elevations for Case 1. o i 4 e ; /a A�7. t L h i:14:-----i'::4:..) r .-..., .::-N:stokc-. 704-p "‘Ii 1N :.1.1.1,:t'''....._ti'.x' , _-' . *.H`w. .ram �. 57 " G5 ILI"---r-r. . * '‘''i . - ) fig Y r- ✓v ititi , w okzi,ii,'. 9 ' . 7_, i ,,,\ ,%,, , win i , ,. '-...N-\, ,,., AN% i S _.___ria..., ---,.. ..-3, . , . . CD co --M k ' �'o .., .r i s t c kk\ ' - ' - N 7' i___.- ,Ii---_ c o ' , Kw. + .t.: ., - a, Vle------ - - - 1 [ _ I o + ' y�r�e. �\ 1 'J fir.\7 o .�" ' 1'1 .te r +I' , r , • `� j w • • iir Nok • z- Q ;' r :t '1 i , ter` �� ;1. r , 1 1 3,185,000 3,186,000 3,187,000 3,188,000 3,189,000 3,190,000 3,191,000 easting (State Plane, feet) 1 Project: NCCI pit expansion-groundwater evaluation 2025 P a g e 130 Figure 10. Modeled groundwater elevations for Case 2. o j\4,.. f .+1 t 7. �+ 1:¢ 1 cz, ''' '' tp : -1r oi.- . ,Iv- . .„--.....;_ v i. .X . " . N .,,\ i * ,,` _ 845 '�' -=ay l i - X. �; , , G5 \t � +� '• ,,c— X + _ a, v cP ti • --dillit4;_- , 2- SIN . 1 . 1 czp.-_, 'I ,.if 1 . 1 ..-'--)LII '17 a.) 0, .- — ,y, , - i �, tip. o \ s k .-nt.• -� A• ',..\ k, _'� \i`k.... , •i, - N , , .4010;„,N., , •„ t� -1, A 2� i •i,� a i1- R • ` g. ems, -. i It .�,.-� • + - N - t" .7" t — .. . .� `• L s• , . i,.. , • ..: ,.. ,, , ,._: ,,.....,.. , , .4 . ,,,, 0. , 44 N ..\ 1 �'� L ` 1• ^t=' . C - 1 ‘t/rii a .., ..4. „„elefr A\,L, , , . ;4 A 3,185,000 3,186,000 3,187,000 3,188,000 3,189,000 3,190,000 3,191,000 easting (State Plane, feet) gl gl Page I 31 Project: NCCI pit expansion-groundwater evaluation 2025 Figure 11. Groundwater level changes for Case 1. Nt i *vti. t. 1$1. t44)iA. ‘ .1 ''°- . ,:\\ 1 P\-". '.*)1:r '.1i. ---A'' ' • 11 Il it...1411°4k*.- ' ' \ 1 gl. G15 iv. r_ t ar cif to 'Ar4 ItPti . 4 .r,.. r , . I' 0 ,ten .y'i' 1 .\ ' , •- �, : ‘4.- 4- c 0O a `,,� i• 1 ! 1 • l ^ iP, • % -•• t �i11r ,I 1i4 f ._a.- • �� _ y ;4(, 6 IL Ips I•• .' L�O • f . A o ..:::. - c. O 1 .l • Ih :,,I,? ♦ /- \„ tY 1 o co — . , 11 .• • ' its4:4 \ ,ti ' • ^ i; v -' , -r '1.._, zi: .:Iiiirr:-...1.''11. ' . .* 1- .____-.-_ ___..4 , .. , t, t f II.4-.. I- ., ,_ i• 1' ,ill . i..; iii:..-1.4_r_," .. . '‘'\ 3,185,000 3,186,000 3,187,000 3,188,000 3,189,000 3,190,000 3,191,000 easting (State Plane, feet) 1 S. Page 132 Project: NCCI pit expansion-groundwater evaluation 2025 Figure 12. Groundwater level changes for Case 2. ° ' I A �.." . a • I► ,iam ._ _•l �.' O t trill...", f , - e.i,..t t. 4,1 '� • 1 t.. Y O 'r• !, $ 1, ,fir 0 �, \ , , s ` e c5_, : , 3H'i .., t., .4.4 k ;141-" ' ' _ . - - ' ' ' Willi co o it rn .- . �- — - - t iH_ , Ai 4 \ ` l et t �ti � r , , , ¢ ��--�"'f 44, ri o1%li ��.�, i; t it r i C s . ,Z,,2 I _ 7.4% j.:•6. •17, ..- ' .::.4 '1 II Ir. , il 1411 i r 1 la . .igi li --1•V.,,,, 1..- * - ,,,,..,......c-•-•.: .. ;#0?, ..' s ' ,t 4 4/ , 0 1;"` * •the- ..,' — - 3,185,000 3,186,000 3,187,000 3,188,000 3,189,000 3,190,000 3,191,000 Basting (State Plane, feet) P ,t c 1 33 Project: NCCI pit expansion-groundwater evaluation 2025 NCCI North Pit Groundwater Evaluation Appendix B—MWE Report,November 2020 - "Water Level Change and Pit Drain Evaluation in the Vicinity of the NCCI Pit, Ft. Lupton, Co. McGrane Water Engineering,LLC 1669 Apple Valley Rd. • Lyons,CO 80540 •Phone: (303)917-1247;email:dennis@mcgranewater.com McGrane Water Engineering, LLC 1669 Apple Valley Rd. • Lyons,CO 80540• Phone:(303)917-1247 � E-Mail:dennis@mcgranewater.com McGrane Water Engineering Water Level Change and Pit Drain Evaluation in the Vicinity of the NCCI Pit, Ft. Lupton, Co. Prepared for The City of Thornton, Colorado November, 2020 Project No.: J&T(Zadel) NCCI Pit Evaluation McGrane Water Engineering, Inc.provides accurate, cost-effective groundwater solutions to municipal, industrial, mining, and recreational water providers using experienced professionals and appropriate technologies. Water Level Change and Pit Drain Evaluation in the Vicinity of the NCCI Pit, Ft. Lupton, Co. Prepared For The City of Thornton, Colorado January, 2021 Project No.: J&T(Zadel) The technical material in this report was prepared by or under the supervision and direction of the undersigned,whose seals as a Professional Geologist and Professional Engineer in the State of Colorado are affixed below: Dennis R.McGrane,P.E.,C.P.G The following independent consultants contributed to this report: Principal in Charge Dennis R.McGrane, P.E.,R.G. Modeler Calvin Miller, P.E., Miller Groundwater Engineering, LLC GIS Analyst Tammi Renninger,ElephantFish,LLC McGrane Water Engineering,LLC. Page i NCCI Pit Evaluation Table of Contents Background 1 Report Format 2 Study Area 2 Gravel Pit Development 2 Executive Summary 3 Discussion 4 Recommendations 5 Hydrogeology 5 Phreatophyte Growth 6 Wells 6 Hydrologic Maps 6 Modeling 7 Predevelopment Groundwater Conditions 7 Groundwater Level Changes caused by pits 7 North Pit Impacts 8 South Pit Impacts 8 NCCI Lined Pit Impacts 8 Combined Pit Impacts 9 Impact Summary 9 Tansient Groundwater Modeling 9 Summer Water Table Baseline Run 10 Current Summer Pit Drawdown 10 Pre-Drain Water Table and Gradient 11 Drain Scenarios 12 On-Site Drain Effectiveness 12 Model Sensitivity and Uncertainty 13 Conclusions and Recommendations 14 References 14 List of Figures Figure 1-Study Area 17 Figure 2-Study Area with CDWR Wells 18 Figure 3-Monitoring Wells 19 Figure 4-Pit Mounding Groups 20 Figure 5-Water Level Changes Resulting From North Lined Pits(without NCCI Drain) 21 Figure 6-Water Level Changes Resulting From Existing LGE Pits(without NCCI Drain) 22 Figure 7-Water Level Changes Resulting From NCCI Lined Pits(without NCCI Drain) 23 Figure 8-Water Level Changes Resulting From all Existing Pits-NCCI,North,and LGE(without NCCI Drain) 24 Figure 9-Baseline High(Summer)Water Table 25 Figure 10-NCCI Pit Dewatering Water Table-Irrigation Season(Summer) 26 Figure 11-NCCI Pit Drawdown Irrigation Season(Summer) 27 Figure 12-NCCI Pit Summer Water Table with Liner(no drain) 28 Figure 13-Summer Groundwater Level Change Caused by Existing Pits(with NCCI liner,but no drain) 29 Figure 14-Summer Groundwater Level Change Caused by Existing Pits(with NCCI liner,but no drain)-Zoomed 30 Figure 15-NCCI On-Site Drain-Summer Water Table 31 Figure 16-NCCI On-Site Drain-Summer Residual Drawdown 32 Figure 17-Modeled Seasonal Drain Flow 33 List of Tables Table 1-Pit Groups 34 McGrane Water Engineering,LLC. Page ii NCCI Pit Evaluation Table of Contents — Appendices Appendix A - Hydrogeology Background A-1 Available Data A-1 Hydrogeology A-2 Predevelopment Water Table A-2 Top of Bedrock Elevation A-2 Aquifer Saturated Thickness A-3 Aquifer Permeability/Hydraulic Conductivity(K) A-3 References A-2 List of Figures Figure Al-Study Area with CDWR Wells A-5 Figure A2-Monitoring Wells A-6 Figure A3-Surficial Geology A-7 Figure A4-Steady State Model Predevelopment Water Table A-8 Figure A5-Bedrock Elevation A-9 Figure A6-Aquifer Saturated Thickness A-10 Figure A7-Transient Model Hydraulic Conductivity A-11 List of Tables Table 1-CDWR Well Data A-12 Appendix B — Model Construction and Calibration Background B-1 Model Construction B-1 Software B-1 Model Grid B-1 Boundary Conditions B-1 River Boundaries B-3 Bedrock Boundaries B-3 Lined and Unlined Pits B-3 Model Inflow and Outflows B-3 Aquifer Properties B-4 Steady State Model B-5 Steady State Model Results Comparison B-5 Transient Model B-5 Transient Boundary Conditions and Aquifer Properties B-5 Lupton Bottom Ditch B-6 NCCI Pit B-6 NCCI Pumping B-6 Transient Model Calibration B-6 Transient Model Results B-7 Transient Model Results Comparison B-8 Mass Balances B-8 References B-8 List of Figures Figure B1-Steady State Model Predevelopment Water Table B-10 Figure B2-Steady State Model Calibration Plot:Modeled vs.Observed Water Levels B-11 Figure B3-NCCI Pit Monthly(average)Pumping Rate B-11 Figure B4-Transient Model Pumping Rate Comparison B-12 Figure B5-Seasonal Water Level Comparison at Monitoring Wells Zl and Z2 B-12 Figure B6-Transient Model Calibration Plot:Modeled vs.Observed Water Levels B-13 McGrane Water Engineering,LLC. Page iii NCCI Pit Evaluation Table of Contents — Appendices (continued) Appendix B — Model Construction and Calibration (cont.) List of Tables Table B-1-Range of Conceptual Parameters used to Calculated COND in Little Dry Creek B-14 Table B-2-Steady State Mass Balance B-14 Table B-3-Cumulative Transient Mass Balance B-14 Appendix C — Monitoring Well Data and Plots Background C-1 Tables and Plots NCCI Pit Monitoring Well Data and Plot C-2 Thornton"Z"Well Data and Plot C-l0 LG-Everist Monitoring Well Data and Plots C-12 Rankin Monitoring Well Data and Plots C-14 McGrane Water Engineering,LLC. Page iv BACKGROUND McGrane Water Engineering, LLC (MWE)was retained by J&T Consulting, Inc. (Fort Lupton, Colorado)to evaluate the effectiveness of installing a perimeter drain around the NCCI gravel mine pits after dewatering ceases this year. The mine is located near Fort Lupton, Colorado and is owned by Northern Colorado Constructors Inc., (NCCI) and is being purchased by the City of Thornton(City). The pits are sometimes referred to as the"Zadel"pits, after Chris Zadel,the owner of NCCI. The pits consist of a main"south"pit and a smaller"north"pit. Dewatering ceased at the NCCI north pit in 2020, and it was partially filled with tailings. According to JC York(J&T Consulting), by January, 2021,the water levels in the NCCI north pit and vicinity wells have nearly recovered. The NCCI south pit is currently being mined and has been dewatered by pumping for approximately the last 10 years. In 2021,NCCI is planning to install a clay liner around the inside of the pit to prevent groundwater from entering. Once the liner is installed,pumping will cease and the water table outside the pit will recover. Water will then be stored inside the liner for municipal use. Potential impacts caused by a liner include a rise in the water table on the up-gradient side (mounding), and water level declines in the down-gradient side(sometimes referred to as "shadowing"). The City of Thornton is concerned that, in the future, nearby land owners may complain about water level changes resulting from the lining. Potential impacts caused by liners or slurry walls on the up-gradient side include flooded basements, soft ground due to waterlogging, or increased phreatophyte growth if the water table mounds close to the ground surface. On the down- gradient side, large capacity water wells could be impacted by decreasing the saturated thickness of the aquifer. To mitigate potential impacts, the City would like to restore groundwater levels to pre-mine conditions. To accomplish this, a subsurface drain could be installed on the up-gradient side of the pit to collect and direct mounded groundwater from the up-gradient side to the down-gradient side where it would re-infiltrate into the aquifer. Between June and November 2020, MWE met with J&T Consulting, Inc., Chris Zadel,the City of Thornton, and the City's consultant,RJH Consultants, Inc.,to discuss the evolution of our pit evaluation and to direct our work. Report Format Conclusions and recommendation are included in the executive summary after short descriptions of the study area and gravel pit development history. The main body of the report then sequentially addresses: • Site hydrogeology; • Pre-development groundwater conditions around the NCCI pit site; McGrane Water Engineering, LLC 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 1 of 35 • Seasonal groundwater level changes caused by recharge from nearby Little Dry Creek and the Lupton Bottom Ditch; • Groundwater level conditions over the past decade while the pit was being mined and dewatered; • Groundwater level changes caused by other nearby lined pits; • Groundwater level changes expected from potentially lining the NCCI pit; and • The effectiveness of various perimeter drain configurations. Report figures are included at the end of the report. Three appendices provide additional detail on the hydrogeology(Appendix A), model setup (Appendix B) and monitoring well data and plots (Appendix C). Appendix figures have the prefix"A" or`B"accordingly, and can be found at the back of each appendix. Some figures are repeated after the main text to simplify finding them. Study Area Figure 1 shows the location of the mine in Sec. 24, Twn. 2N, Rng. 67W(6th PM) located approximately two miles north of Fort Lupton, Colorado on the west side of the South Platte River (SPR). The study area surrounding the pits includes nine square miles in sections 18, 19, 30, and 31 in Twn. 2N, Rng. 67W, and sections 13, 24, 25, 35, and 36 in Twn. 2N, Rng. 68W. The SPR meanders northward approximately one mile to the east. The gravel pits are located within sand and gravel deposits that extend approximately 1 to 2 miles on either side of the river. Little Dry Creek (LDC) is tributary to the SPR from the west on the south side of the study area. Once LDC reaches the modern SPR floodplain, it jogs northward and becomes channelized. After flowing past the west sides of the NCCI pits,LDC eventually joins the South Platte River. Several gravel pits have historically pumped dewatering discharge water directly into LDC, similar to the NCCI south pit currently. The Lupton Bottom Ditch(LBD) is located approximately 1,000 to 2,000 ft west of LDC on older terrace deposits. The LBD provides seasonal recharge to the alluvial aquifer and is close enough to the NCCI pits to cause significant seasonal fluctuations in the water table. Gravel Pit Development We grouped vicinity pits based on their location relative to the NCCI pits. Figure 4 shows the location of the NCCI pits between a"northern"group of pits and LG-Everest(LGE)pits to the south. The NCCI pits (#1 and#2)were first permitted in 2001 and later amended in 2008. The"northern"pits include the Keonig pit(#5)which was first mined by Weld County in 1980 then lined in 1999. The Heit Pit(#4)was first developed in 2003 for mining and lined in 2007. The Lupton Meadows Pit(#3)was mined starting in 2016 and lined in 2018. After lining,we believe the water table likely recovers within 6-months to one year depending on the proximity to recharge. The LGE pits were first developed in 1999 and are all located south of County Road 18. Several amendments to these mining permits have been approved adding additional area for mining with the most recent amendment being approved in 2012. The amendments added a property adjacent to, and east of, the NCCI pits along CR 25 and several properties extending south of the existing LGE pits that abut CR 14.5. All the LGE pits except#10 and#15 have been lined. Pit#6 was most recently lined in 2019. McGrane Water Engineering, LLC 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 2 of 35 There are other properties on the north and east of the NCCI pits that could be permitted in the future for gravel mining which were not considered as part of this study. EXECUTIVE SUMMARY During this evaluation, we: 1. Evaluated the hydrogeology of the alluvial aquifer in a nine square-mile area along the SPR and along LDC; 2. Built a steady-state groundwater model to evaluate the incremental and cumulative impacts caused by other gravel pit groups, including the NCCI pit and other pits located to the north and south; 3. Evaluated pit dewatering pumping rates and water levels over the past 10 years; 4. Evaluated aerial photographs available on Google Earth to identify wet ground conditions prior to NCCI pit development; and 5. Constructed a transient groundwater model to evaluate seasonal water level changes and to estimate drain flows for various drain configurations. Observations and inferences include: 1. Based on aerial photographs taken prior to NCCI pit development, the water table east of the NCCI pit was likely shallow and fluctuated close to the ground surface due to seasonal recharge from LDC and LBD and other irrigation ditches. 2. Well construction reports filed over time suggest that aquifer levels away from the NCCI pits have not significantly changed over time. This is because seasonal pumping is quickly replenished by surface water recharge from nearby rivers, streams, canals, and laterals. 3. Seasonal recharge from the LBD creates fluctuations as large as 8 feet in monitoring wells Z1 and Z2 which are located between the NCCI south pit and the LBD. 4. Historical records show that NCCI south pit dewatering rates increase in the summer, likely due to increased seasonal leakage and recharge from LDC and LBD. 5. Over the past decade,dewatering the NCCI pits may have benefited shallow groundwater areas located east of the pits by dampening seasonal recharge fluctuations. 6. The area of phreatophyte growth (mostly cattails) in LDC located west of the NCCI pit has expanded in the last decade despite the water table being lowered by NCCI south pit dewatering. This indicates that the phreatophytes in the LDC channel depend on infiltrating surface water and not groundwater. 7. Pits located north of the NCCI pits have had a minor impact on water levels around the NCCI pits. 8. LGE lined pits to the south have caused approximately three to four feet of ground water decline (shadowing) on the east side of the NCCI south pit which overshadows local impacts caused by NCCI pit lining. 9. The steady-state model indicates that a NCCI south pit liner will create a one-foot rise in water levels on the west side and up to a one-foot decline on the east side compared to predevelopment conditions (attributable to the NCCI pit alone, not including impacts from McGrane Water Engineering, LLC 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 3 of 35 other pits). For comparison, monitoring data suggests that water levels in this area fluctuate seasonally by 4 to 8 feet which is large and likely overshadows all pit liner impacts. 10. Monitoring well data and steady-state and transient modeling suggest that there is a vertical gradient(no hydraulic connection)between LDC and the groundwater table. 11. A drain could be installed at the predevelopment water level to reduce the expected mounding on the west sides of the NCCI pits and drain the water off to the east sides of the pits. 12. To design the perimeter drain, we used a transient groundwater model to allow us to consider the design flow rate based on the seasonal peak recharge (highest groundwater) conditions. Based on model runs, we conclude: 1. That the cumulative changes in the water table caused by all lined pits in the vicinity of the NCCI Pit are less than a 2 foot increase in the west and approximately 3 feet of decline in the east. The decline is a result of shadowing caused by the LGE pits to the south. Even if a drain is installed, it will only reduce the shadowing by about 1 foot. 2. Because there is a hydraulic disconnection between LDC and the water table,we do not expect the area of phreatophytes (and therefore the amount of evapotranspiration) in the LDC channel next to the NCCI to change in the future regardless if a drain is installed around the NCCI pit. 3. Although there is one high capacity irrigation well located within the area of long-term shadowing, the forecast decline in production is less than 10 percent which is insignificant compared to seasonal water table fluctuations. 4. If a drain is installed around the NCCI south pit, it should be installed at the predevelopment water level (approximately 5 feet below ground level), and at a grade having a drop of at least one foot from the northwest to northeast corners. The pipe should be sized to not have greater than approximately 1 foot of head loss at the design flow rate (300 to 350 gpm). 5. The modeling suggests that a drain around the NCCI north pit would have negligible benefits because: i)modeling suggests that the water levels there will only be about a foot above pre- existing conditions (Figure 8); ii)the summer water table is also less than a foot above pre- existing conditions (Figure 14); and iii) if a drain were installed around the northern pit,then it would overlap with the purpose of a drain around the NCCI southern pit. Discussion The change in water levels caused by the sum of all pit development, compared to pre-development conditions,is approximately a 1-ft rise on the up-gradient side and 3-ft decline on the east side. These impacts will likely be overshadowed by 4 to 8 feet of seasonal water table fluctuations. In addition, the groundwater levels in this area have historically been very shallow. Therefore the 3 feet of shadowing east of the NCCI south pit may be benefiting existing property owners who may have experienced seasonal wet ground due to high seasonal water levels before NCCI south pit dewatering McGrane Water Engineering,LLC 1669 Apple Valley Rd. • Lyons,CO 80540• Phone: (303)917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 4 of 35 began. We are concerned that the installing a drain could be perceived as a greater problem than not installing the drain. If high water levels ever do pose a problem in the future, we believe localized mitigation such as installing a tile drain, French drain, or sump pump at the area of concern will be more cost-effective than installing a large, expensive, passive perimeter drain system. Also, if phreatophytes become a future nuisance, it will likely be more cost effective to improve the LDC surface channel to drain standing water than to attempt to lower the water table from below. Current observations suggest that the phreatophyte area may remain wet even if a perimeter drain were installed. Recommendations We recommend to not install a drain around both the NCCI north or south pits because: 1. There will be minimal changes compared to predevelopment conditions, and the changes compared to current existing conditions may not be favorably received; 2. The gradient to drive flow through the drain and around the pits(a large drain run) is so low that it may require large diameter(more expensive)pipe to flow passively; 3. Less expensive localized mitigation of mounding (local tile drains, French drains or sump pumps) are likely more cost effective; 4. The amount of common approximation error in our model(approximately+/-2 ft) is close to the predicted impacts which sheds doubt on whether the expense of a drain is justified. Regardless of whether a drain is installed around the NCCI south pit or not, we recommend that monthly monitoring continue using existing monitoring wells for some period of time. The data could be used to document changes and evaluate future groundwater conditions, seasonal water level changes, and the effectiveness of the pit lining or drain(if installed). Such data could also be used to refine this model in the future, if necessary. HYDROGEOLOGY We evaluated the hydrogeology as a first important step before creating a groundwater model. We compiled hydrogeologic data from: • Existing reports from the U.S. Geological Survey and Colorado Division of Water Resources (see sources below); • Well permit completion reports from 148 registered alluvial wells available from the State's well database (CDWR, 2019); and • Water level data from 61 monitoring wells located around the NCCI pit. Appendix A contains tabulated well data for both CDWR wells and gravel pit monitoring wells (Table Al). We pulled the completion reports for the CDWR wells and compiled location, depth, depth to bedrock, depth to water,pumping rate, and calculated saturated thickness values which are plotted on maps discussed below. Appendix A also includes a detailed description of how McGrane Water Engineering,LLC 1669 Apple Valley Rd. • Lyons,CO 80540• Phone: (303)917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 5 of 35 groundwater moves through the alluvial aquifer and is affected by the geology, topography, and surface water. Figure 2 shows the well data locations with permit number. The shapes represent various well uses including agricultural, domestic, stock, municipal, and monitoring wells. The well water levels were used to calibrate the steady state groundwater model used in this report and discussed in Appendix B. Figure 3 shows the location of nine monitoring wells belonging to NCCI(green), four belonging to the City of Thornton(orange) and fifteen belonging to LG-Everist(LGE)who owns over a dozen gravel pits located south of the NCCI pit(blue). Monitoring well data are compiled in tables and shown in plots in Appendix C. Seasonal water level changes in monitoring well Z1 and Z2 were used to calibrate the transient groundwater model discussed below. Z1 and Z2 were used because water levels in other monitoring wells were clearly dominated by dewatering activities while Z1 and Z2 were further from the pits and closer to the creek and to the Lupton Bottoms Canal. Therefore,when calibrating the model to seasonal water level fluctuations, Z1 and Z2 where the best calibration targets. Additionally, since other monitoring wells were dominated by pit dewatering and nearby pit lining, calibrating to that data would have required more year-to-year detail about lining progress and status of both the NCCI pit and neighboring pits. In our opinion, focusing our calibration on the seasonal fluctuations to Z1 and Z2 data gives us confidence that our drain design for seasonally high conditions is accurate for key flow conditions. Therefore, other water level time series data was not used for model calibration. Phreatophyte Growth The historical presence, and a possible later increase, in phreatophytes in the "wet" area located west of the NCCI south pit should be noted. As previously stated, lined pits block groundwater flow. Alluvial groundwater gets blocked (causing mounding), and then is deflected around LGE pits to the west side. Based on our review of aerial photographs along the south side of the NCCI north pit, phreatopyte growth has grown over the past decade despite lower groundwater conditions caused by NCCI pit dewatering. This is an important point because it is evidence that the NCCI pits has not contributed to phreatophyte expansion and will not in the future regardless of whether or not a drain is installed. Wells Appendix A includes tabulated well data from 148 registered alluvial wells and 61 permitted monitoring wells. Depth to bedrock at the water wells ranges from 20 to 73 feet and averages 43 feet. Well yields range from 4 gpm for domestic wells to 2000 gpm for irrigation wells. The depth to water ranges from 2 to 40 feet and averages 15 feet. The calculated saturated alluvial thicknesses range from 2 to 50 feet and average approximately 26 feet. Hydrologic Maps Appendix A includes detailed descriptions of the following hydrologic maps: McGrane Water Engineering,LLC 1669 Apple Valley Rd. • Lyons,CO 80540• Phone: (303)917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 6 of 35 • Surficial geology(Figure A3); • Pre-development water table (Figure A4); • Elevation of bedrock(Figure A5); • Alluvial aquifer saturated thickness (Figure A6); • Alluvial aquifer permeability(Figure A7); and • Aquifer transmissivity, the product of saturated thickness and permeability(Figure A8). MODELING Groundwater models are used by hydrogeologists to simulate groundwater flow through the subsurface. We first used a steady-state model to evaluate general groundwater level changes caused by the NCCI and nearby pits. We then constructed a transient groundwater model from the steady-state model to evaluate the effectiveness of various perimeter drain configurations under the influence of seasonal water table fluctuations. Appendix B contains more details on model construction, input parameters, calibration, and run mass balances. Pre-development groundwater conditions The"pre-development"water table represents pre-mining conditions and serves as the measure for impacts caused by pit lining. It was generated by the steady-state model described in Appendix B and shown in Figure Bl. The objective of evaluating changes compared to predevelopment conditions is to determine potential negative impacts to nearby property owners who may be affected or perceive effects from by mounding or shadowing in the ways previously described. The pre-development"average"gradient across the pit footprint is approximately 1 foot. The head difference increases to about 4 to 5 feet across the pit footprint once the NCCI pit is lined. The steepened gradient created by pit lining and seasonal recharge are critical factors in determining potential drain flow. Groundwater level changes caused by gravel pits Impacts caused by lining gravel pits were computed by applying the principal of superposition(Reilly, et al, 1987). The principal states that solution to individual problems can be added to obtain solutions to more complex problems. It also means that if precipitation recharge and evapotranspiration are not expected to change significantly,then their influence can be ignored in the evaluation because they are the same in both the before and after cases. Using superposition, we evaluated the effects of three groups of pits described in Table 1 and shown on Figure 4. We conducted individual model runs to evaluate water level changes (relative to pre- development conditions) caused by each group. We did this by successively turning off the pit group model cells for each run (making those lined pit cells impermeable or "no-flow" cells) and then McGrane Water Engineering, LLC 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 7 of 35 subtracting model head outputs in the new run to determine incremental head changes caused by the pit-group changes. Precipitation and evapotranspiration are not considered in the model runs because we do not expect there to be a significant change in either of these parameters resulting from pit lining or installing a drain. Therefore, it is unnecessary to spend additional time to understand and simulate them. Since both the pre-pit and post-pit steady-state runs represent average groundwater conditions,the differences shown in the figures below are average differences. As we will discuss later,these changes are small compared to the average monthly water table fluctuation. Therefore, if the water table is generally dropping downgradient from the pit, that decrease may actually benefit downgradient water users by dampening what was a natural increase in water levels. For this reason,we need to keep the discussion of steady-state impacts in perspective compared to seasonal changes discussed later in the report. Northern Pit Group Impacts Figure 5 shows the mounding caused by the three existing lined pits located north of the NCCI pits. The positive contours show"mounding" on the up-gradient sides of the pits (light blue contours) and the negative contours show"shadowing"on the down-gradient side(red contours). The black contour represents no change. Observations include: • Mounding of up to 2 feet, but only 0.5 to 1.5 ft of mounding extends to the location of the NCCI north pit and only approximately 0.5 feet of mounding reaches the NCCI south pit, and • Shadowing north of the Northern pit group does not affect the NCCI pits. As we will see later when we combine the impact of mounding caused by the northern pit group with shadowing caused by the NCCI and LGE pits to the south, the impacts actually cancel each other out to some extent. We are uncertain whether this provides an actual benefit to landowners located north of the NCCI pit or not since the predevelopment water table was generally high in that area. South(LGE) Pit Impacts Figure 6 shows water level changes caused by existing LGE pits. Observations include: • Up to 8 ft of mounding on the west and south sides of LGE pits,with mounding over two feet extending one mile south of the LGE pits; and • Shadowing up to 3 ft on the east and west sides of the NCCI south pit, and 1 ft of shadowing on both sides of the NCCI north pit. We conclude from this map that most of the shadowing on the east side of the NCCI pits is caused by lined LGE pits and the LGE pit shadowing tends to mitigate mounding caused by the NCCI pits discussed below. NCCI Lined Pit Impacts Figure 7 shows water level changes caused by just the NCCI pits, including: • Mounding from 0.5 to 1.5 ft on the west side of the NCCI north pit; McGrane Water Engineering,LLC 1669 Apple Valley Rd. • Lyons,CO 80540• Phone: (303)917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 8 of 35 • Mounding 2 -4 ft on the west side of the NCCI south pit; and • Less than 1 ft of shadowing east of the of the NCCI pits. We conclude from this map that the "fines"placed in the north NCCI pit create very little impact to the water table,but the mounding caused by the NCCI south pit could be significant. However, as discussed above, the overlapping shadowing caused by the LGE pits in that area will likely cancel that impact, This is shown in the combined pit impact maps below. Combined Pit Impacts (Northern, LGE, and NCCI) Figure 8 shows water level changes caused by all existing pit groups, including: • Mounding up to 1.5 ft west of the NCCI pits; • Mounding up to 8 ft west of the LGE pits; • Mounding up to 6.5 ft south of the LGE pits; and • Shadowing up to 3 ft to the east and north of the NCCI pits. By comparing Figure 8 with Figure 2 (DWR wells),there is only one high capacity irrigation well (permit no. 5746-F) located on the north edge of the NCCI south pit within the 2 ft shadow forecast. According to the Colorado Division of Water Resources well database (URL: https://dnrweblink.state.co.us/dwr/DocView.aspx?id=1620836&dbid=0),the well is 32 feet deep; had a reported depth to water of 4 feet in 1964; and reportedly produced 1200 gpm for irrigation purposes. The saturated thickness of the aquifer prior to pit mining was 28 ft(32'-4'). The summer irrigation season drawdown(Figure 11) is approximately 18 feet. This would mean the summer aquifer saturated thickness was approximately 10 feet(32-18-4 ft). Since well yield is proportional to the aquifer saturated thickness,the expected well yield should be approximately 400 to 500 gpm [1200 gpm * (10'/28')] the reported yield. According to JC York(J&T Consulting),there have not been any complaints of reduced well yield by the well owner. This is likely because recharge from the existing dewatering canal that runs past the well on the north side of the NCCI south pit likely keeps the well running at an acceptable rate. In the future, the theoretical reduction in well yield is also expected to be proportional to the decline in saturated thickness due to shadowing (approximately 2 feet). Therefore the expected decline of the well is only 7% (2'/28') which is insignificant. Impact Summary In summary, lining the NCCI pits is projected to cause over 3 ft of mounding on the west side (Figure 7),but most of it is cancelled out by LGE pit's shadowing(Figure 6). The NCCI south pit contributes about a foot of shadowing on the north and east sides, which when added to the LGE pit shadowing(Figure 6)totals approximately 3 ft(Figure 8). We do not expect any high capacity wells to be effected by changes in water levels caused by pit lining. Transient Groundwater Modeling We used the transient model to evaluate various drain locations, depths, and discharge options. We built the transient model from the steady state model, so it has many of the same boundary conditions. We incorporated recharge during summer months to match higher seasonal dewatering McGrane Water Engineering,LLC 1669 Apple Valley Rd. • Lyons,CO 80540• Phone: (303)917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 9 of 35 rates and simulate expected higher drain flows during the irrigation season. The transient model utilizes two stress periods per year(summer canal season and the off-season) and 12 model time steps per season. To gain confidence in the model projections, we focused the transient calibration on observed NCCI pit dewatering rates and observed water levels in monitoring wells Z-1 and Z-2 (see Appendix B). These two wells are far enough from the NCCI south pit to show the seasonal recharge fluctuations which are not apparent in the other monitoring wells due to pit dewatering. We therefore chose to calibrate to the seasonal fluctuations apparent Z-1 and Z-2 instead of the annual dewatering trends shown in the other wells. Summer Water Table Baseline Run We focused on the highest drain flow condition for drain design(gradient, depth, and flow design parameters). This occurs when seasonal recharge on the upstream side of the NCCI pit is highest from recharge from LDC and LBD. To model this,we needed to expand the modeling beyond using a steady state model that used average water level conditions with no seasonality. We therefore created a model using transient recharge that was calibrated to actual seasonal pit pumping amounts (See Appendix B). This allowed us to focus on a seasonal water table fluctuations at a more local scale. We again used a predevelopment run with no pits present for a baseline reference case (pre- development conditions). We selected the late July 2019 water table as the baseline month for the change comparison(Figure 9) since late summer is when we expect the highest water levels west of the NCCI pits due to recharge from LDC and LBD which is also when we expect the highest drain flow. This is the baseline against which changes are evaluated in the remainder of this report. To validate this map,we compared it to a map of seasonally high water table conditions created by the Colorado Water Conservation Board as part of their South Platte Decision Support Project. (SPDSS (CDM-Smith, 2013, Fig. 4-3). Although we did not do a cell-by-cell comparison, the contours appear to be within a few feet. We attribute this difference to our use of more accurate ground control and accuracy of the modeling using the more refined grid. We then compared the baseline summer water table (no NCCI pit liner or drain)to the following scenarios: Current Summer Pit Drawdown The purpose of this run is to first consider what conditions neighbors may have become accustomed to during the last 10 years during NCCI pit dewatering. The run includes current NCCI pit dewatering without a liner under existing pit development conditions (with lined LGE and Northern pit groups in place). The results(Figure 10) shows tight water table contours around the north and south NCCI pits that generally agree with measured monitoring well elevations. In an attempt to calibrate the transient model to the 4861 foot levels measured at ZI and Z2, we increased streambed leakance parameters of LDC and increased recharge from Lupton Bottom Ditch. Those changes also affect future modeled drain flow. Appendix B includes more information on the transient model calibration. We then subtracted the water levels with and without pit pumping to create the NCCI pit summer drawdown map (Figure 11). The maps shows over 20 feet of drawdown at the NCCI north and south pits. The drawdown extends away from the pits such that there is: i) 11 to 15 feet of drawdown west of the NCCI south pit underneath Little Dry Creek (LDC); ii) up to 18 feet of drawdown north of the NCCI south pit; and iii) and up to 17 feet of drawdown east of the south pit. This supports our conclusions that: McGrane Water Engineering,LLC 1669 Apple Valley Rd. • Lyons,CO 80540• Phone: (303)917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 10 of 35 • During current dewatering, there is a hydraulic disconnection(i.e.,vertical gradient)between LDC and the aquifer west of the NCCI pit;therefore any vegetation located along the east side of the pit is being supported by surface water and not groundwater; and • The pit drawdown on the east side of NCCI pits today has existed for several years, and far exceeds the long-term shadowing impacts caused by pit lining When considering potential impacts, the City of Thornton and NCCI pit operators should consider there are several homes visible behind the contours in Figure 11 who have not complained and therefore have likely "accepted" the lower groundwater condition. If a drain were installed, and mounded groundwater was routed around to the east side of the NCCI pit and allowed to recharge,then the resulting increase in water levels may be considered undesirable even though it does not quite return to predevelopment conditions. Pre-Drain Water Table and Gradient For a drain to work properly,there needs to be an adequate gradient(head difference)between the west side of the pits and the east side. Figure 12 shows the summer water table after the NCCI south pit liner is installed and the pit recovers. The water table elevation on the south end of the NCCI north pit and the northwest corner of the NCCI south pit(near the"wet"area along LDC) is approximately 4860 ft. The water table elevation at the northeast corner of the NCCI south pit is 4856 ft, creating only a 5-ft gradient across the south pit. From a design standpoint,the low gradient can be compensated for by using a larger pipe that reduces friction loss. Based on conversations with J.C. York(J&T Consulting, Inc.) five feet is enough gradient to make the drain work in the summer,but considering the+/- 2 feet of estimated uncertainty in the model (see Uncertainty Section below), and the likeliness of a flatter gradient during months with less recharge,we are uncertain whether water will move from west to east every month of the year. This also brings into question the need for the drain. The role for a drain around the NCCI pit was further evaluated by subtracting the summer water table without a drain(Figure 12) from the "baseline" summer run(Figure 9). The resulting Figure 13 shows that without a drain,the summertime water table (relative to pre-mining conditions) is expected to: • rise approximately 12 feet on the west side of the LGE pits to the south; • rise up to 7 feet on the south side of the LGE pits; • rise less than one foot on the west side of the NCCI south pit and 0.5 to 1.0 ft along the west side of the NCCI north pit(this minor change suggests that a drain may not be necessary); • decline up to 4 feet on the east side of the NCCI south pit; and • decline of less than 1 ft on the east side of the NCCI north pit. Figure 14 zooms into the NCCI pit in Figure 12 to emphasize that even without a drain,there is expected to be minimal mounding on the west side of the NCCI pit and under 4-ft of shadowing on the east side of the southern NCCI pit. We believe these impacts are small and that a drain to move McGrane Water Engineering, LLC 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 11 of 35 water from the west side to the east side does not have a clear purpose and,therefore, may not be cost-effective. This is because: • The increase in water levels on the up-gradient side of the NCCI pit is approximately one foot which is likely less than the accuracy of this model (see"Uncertainty Section"); • Natural groundwater fluctuations of four to eight feet caused by seasonal recharge far exceed the changes caused by the pit liners (See Monitoring Well Z1 and Z2 in Figure B5). • A four foot drop in the water table on the down-gradient side of the NCCI pit results in less than a 20% decline in the pre-development saturated thickness (Figure A6). Since well yield is proportional to the saturated aquifer thickness, we would not expect a 20 percent drop to be noticeable unless an active irrigation well is present in that area. We recommend comparing Figure 14 with the location of existing irrigation wells to see if any existing wells are located in the"shadow"area immediately east of the pit. Drain Scenarios We ran several drain scenarios (i.e., subsurface perforated pipe) around the south NCCI pit: • Scenario 1 -A circular drain almost entirely around the south pit; • Scenario 2—A north-south drain along the west side of the south pit and along the east side of the NCCI north pit(on an existing road)that drains north into LDC; and lastly, • Scenario 3 —A collector drain along 2,200 ft of the west side of the NCCI south pit which then re-infiltrates water though a perforated pipe along the north and northeast sides of the south pit. Scenario 1 was rejected by the clients because the drain was too long and therefore cost prohibitive, plus if installed deep it arguably moved more water than is necessary,possibly resulting in water levels too low on the west side of the pit. Scenario 2 was rejected because the City of Thornton did not want to discharge groundwater to LDC,which would require additional permitting, and because the City did not want to have the pipe in the right-of-way along the east side of the NCCI north pit. The preferred location (Scenario 3),therefore,was around the south pit,but not installed completely around it as was the case in Scenario 1. On-Site Drain Effectiveness Figure 15 shows the location of the NCCI southern pit drain(Scenario 3) and the residual mounding and shadow relative to the baseline, summer water table (Figure 9). The south-to-north flowing perforated drain(2,200-ft long,black and yellow line)would collect and transport water to a 1,600- ft-long, eastward flowing perforated section, followed by a 500 ft south-flowing section extending southward from the northeast corner(black and gray). The total drain length is approximately 4,300 ft. The re-infiltration pipe gradient along the north side of the NCCI south pit is nearly flat between elevations 4858.5 and 4857.5 ft. This is because the exfiltration pipe becomes submerged as the water table rises, which limits its flow rate by reducing the gradient. Figure 16 shows the residual drawdown compared to existing summer conditions if the on-site drain is installed. The on-site drain results in less than 0.5 feet of residual mounding on the west side of both NCCI pits. About 3 feet of residual drawdown remains on the east side of the south pit. Therefore the drain only reduced the McGrane Water Engineering, LLC 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 12 of 35 shadowing by about 1 foot. As discussed earlier,residual shadowing on the east side of the NCCI pit was caused by LGE pits (Figure 6). Figure 17 shows how re-infiltrating water essentially backs up the drain and reduces the flow rate through the drain pipe by reducing the gradient. The blue lines represent the theoretical drain inflow and outflow with no resistance to flow on the down-gradient side. Without resistance (caused by the back-up),the peak theoretical flow during the summer irrigation season is approximately 350 to 400 gpm. Note: the theoretical values are similar to what we found for the performance of a straight south to north drain discharging to LDC. However, with discharge being directed to the aquifer on the north and northeast side of the NCCI southern pit,the water table rises to the pipe and reduces flows. The dashed black line in Figure 17 represents how much flow is expected to actually occur through a large diameter drain(approximately 300 to 350 gpm)because of the flattened gradient and backup. That flow is about approximately 50 gpm less than the free-discharge case. Based on these evaluations, the exfiltration pipe should be large enough to convey the simulated flows at a nearly flat hydraulic grade. The actual sizing was beyond the scope of this study. We did not conduct any drain scenarios around the NCCI north pit because modeling of the south pit drain suggests: i)the recovery is less than 1 foot above pre-existing conditions (Figure 8); ii)the summer water table is also less than a foot above pre-existing conditions (Figure 14); and iii)if a drain were installed then it's function would overlap with the function and effectiveness of a drain around the NCCI southern pit by lowering the gradient from west to east. Model Sensitivity and Uncertainty Subsurface data is always limited in spatial coverage and detail. Subsurface evaluations therefore involve several approximations and assumptions. A formal sensitivity analysis to compare a range of assumptions and combinations of assumptions would require a significant amount of time and budget, and yet there would still be some uncertainties. Models include three types of error: 1) conceptual error (how the model is set up and what boundary conditions are used); 2)parametric error(how aquifer properties are measured and calculated); and 3) predictive error (which includes other influences such as seasonal recharge or climate change variations). It was beyond the scope of this project to quantitatively evaluate how the sum of these errors could affect the accuracy of our predictions. However, we feel the models are reasonably accurate and reliable because: • The model aquifer input parameters (including ground and water table elevations, well data, and aquifer properties) were derived from reliable source such as State databases and US Geological Survey maps and reports; • The aquifer boundary conditions and model conceptualization are relatively simple; • The transient and steady state models used mostly the same boundary conditions, and both correspond reasonably well with reference maps and databases of water levels; • We spent considerable time partially calibrating the transient model to seasonal monitoring well data and dewatering rates around the NCCI pit; and McGrane Water Engineering, LLC 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 13 of 35 • The models are consistent with other vicinity models we have created for other clients in that area. Without an exhaustive and very expensive sensitivity analysis,our ability to provide uncertainty ranges for the modeled conditions is limited. If asked to speculate, however, we assume our model change results (mounding and shadowing) are accurate to within +/- 2 feet. Model accuracy for absolute elevations,however,is more difficult to predict since elevations depend on time of year and even year- to-year variations in weather, creek conditions, and nearby canal operations. Finally,please note that actual construction, operation, and maintenance of a subsurface drain may be different than what is known or assumed at the time of our analysis. Future drain conditions are outside our scope and control. CONCLUSIONS AND RECOMMENDATIONS See the executive summary at the beginning of this report. REFERENCES CDM-Smith, April, 2013. South Platte Decision Support System (SPDSS) Alluvial Groundwater Model Report. CDM-Smith,December 6, 2006. SPDSS Phase 3, Task 34.3 South Platte Alluvium Region Aquifer Property Technical Memoradum. CDM-Smith, June 9, 2006. SPDSS Phase 3,Task 34.3 Streambed Conductance Technical Memorandum. Colorado Division of Water Resources (CCDWR)Well Data Base, 2020. https://DWR.state.co.us/Tools/WellPermits Colorado State University (CSU), December, 31, 2013. HB12-1278 Study of the South Platte River Alluvial Aquifer. Report to the Colorado Legislature. Hurr,R.T and Schneider,P., 1972. Hydrogeologic Characteristics of the Valley Fill Aquifer in the Greeley Reach of the South Platte River Valley, Colorado. USGS Open File Report 73-124. J&T Consulting,LLC.,personal communication,June-July,2020. Pit lining status based on several emails with JC York (J&T) who provided the "LG-Everest Reclamation Pit Map.pdf," and his email correspondence with Matt Noteboom(LGE). Langer, W. H., and Lindsey, D. A., 1999, Preliminary deposit models for sand and gravel in the Cache la Poudre River valley: U.S. Geological Survey Open-File Report 99-587,27 p. Lindsay,D.A.,Langer,W.H.,and Knepper,D.H.,2005. Stratigraphy,Lithology,and Sedimentary Features of Quaternary Alluvial Deposits of the South Platte River and Some of its Tributaries East of the Front Range, Colorado. U.S. Geological Survey Professional Paper 1705. McGrane Water Engineering, LLC 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 14 of 35 Lindsey,D.A.,Langer,W.H.,and Shary,J.F., 1998,Gravel deposits of the South Platte River valley north of Denver, Colorado,Part B -Quality of gravel deposits for aggregate: U. S. Geological Survey Open-File Report 98-148-B,24 p. McDonald,M.G.,and Harbaugh,A.W., 1988,A modular three-dimensional finite-difference ground-water flow model: Techniques of Water-Resources Investigations of the United States Geological Survey, Book 6,Chapter Al, 586 p. McGrane Water Engineering, llc. December 2, 2019. Den Pit Private Well Evaluation, a letter report to Mr. JC York,J&T Consulting, Inc.,Ft. Lupton, Co. McGrane Water Engineering, 11c. May 10, 2017. Bennett Pit— Slurry Wall Assessment, a letter report to Mr. JC York,J&T Consulting, Inc.,Ft. Lupton, Co. McGrane Water Engineering,llc.July 13,2015. Loloff Pit—Slurry Wall Assessment,a letter report to Mr. JC York, J&T Consulting, Inc.,Ft.Lupton, Co. Miller Groundwater Engineering,June 29, 2009. Groundwater model evaluations of the Broomfield Well Field. Letter report to Dennis McGrane,Leonard Rice Engineers, Inc. Soister,Paul E., 1965.Geologic Map of the Platteville Quadrangle,Weld County,Colorado. US Geological Survey Quadrangle Map GQ-397. Soister, Paul E., 1965. Geologic Map of the Fort Lupton Quadrangle, Weld County, Colorado. US Geological Survey Quadrangle Map GQ-399. Reilly,Thomas E,Franke,O.L., and Bennett, Gordon D., 1987. The Principal of Superposition and its Application in Ground-Water Hydraulics. Techniques of Water-Resources Investigations of the United States Geologic Survey, Book 3—Application of Hydraulics. Robson, S.G., and Others, 2000, Geohydrology of the shallow aquifers in the Fort-Lupton- Gilcrest area, Colorado. USGS Hydrologic Investigations Atlas HA-746C. McGrane Water Engineering, LLC 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 15 of 35 REPORT FIGURES McGrane Water Engineering,LLC 1669 Apple Valley Rd. • Lyons,CO 80540• Phone: (303) 917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 1 6 of 35 67W 66W W� �E 0 - P ° r l o� I' I I f o z III c'J g � _ � I c fyL ep Creek (I/ z Feet 0 2,500 5,000 Figure 1 Map Legend Study Area Q NCCI Pit Study Area I -J Property Boundary NCCI Pits NCCI Pit Weld County, Colorado Sources: Date:November 17,2020 c rG n e Water J&T Consulting MW/Pit Location Drawings,NHD Datum/Projection:NAD83/Colorado State etl (photorevised),ESRI World Imagery(2018) Plane North,feet Engineering, LLC Page 17 of 35 67W 66W - . 06 N 47721-F 57544-MH . -_ 4 - - 48356- 258578 n 258579 W�� E = 5565240H 57-WCB 258576 /50354-F S 6222-R-R 1( 0136-R 258577� 55651-M H 67987-F 281883 305222 305223, `/ 281884 8 YT 303766 258570 281885 303765572 9495 14184 258571 ' 48616-M H - 124264 -- 249322 72389 56•WCB 707-WCB 16382-R �1 38366-A n 124264-A „ �258575 0 2. G —' -271445 9723 271446 0 10279 9722 n •258573 163g0-R-R 16238-R 224912 � 0 ' ' 9524-F C rt174064 11328 k ---��- - "..'— 231762 /,� ��224909 258574 153020 22418(� 224910 „, 0 24911 284�7 6637-R-R 10811-F 12596-R 3 �, A 298765 �' 5746-F 6637-R 153021 28003-A s 259390 t. - I 22 162219-A 162220-A I _ 221 lbiI 283954 142770-A 6638- ' 283953 25 389 243779 1 275779 0 J1'1* �� 244547 6639-R 263722 • 59807-M H 185928 46392 208434 291633 N ,� 259388 59606-0H 259391 �, L in`� 259387 93439-A 46415 222341-A/ 157913 6820 R :, 264637 12670-R 156312-A 276601 118419-A 47204 259383 292788 259392 93439 23110 /239875 261574E 80437 115196-A 4234-F 45751-MHO A 6231-R 22612-F-R 57957-F 58545 F 215110-A 259386 259384 ,r.--, A A A• 151399 11082-F-R A • 151398-A A 297892 n, 297891 259393 881-WCB 58544-F 259382 58541-F 146-? 297890 721-WCB 58543-F •/1A 255459A A, 147779-A A 24644 5854 0 259380 6912-F A 147779-A 0 291814 11170-R ` 259381 '- 24643 148826 A 58540-F 25158 183741-A 183741-A 226861 76071-F 25158-A 6229-R 945-WCB © 6818-R-R 20306-F 12883-R 266486 20305-F 15680 104531-A 198087-A 12221-F 12884-R 266881 267441 254301 14439 1050-R /k - 18832 63203 190138-A 0 36023-M 485671048-R 307941 A 307943 36030-M 288726 ./14807-R-R 1.11111111, ocy Cree 29915 9527 307945 36033-M n 75962-F cue ti 13093 307944 A 10030-F ® Q A 36021-M i G .A L\ 36022-M 9120- 360244 • Q 811 1049-R i; -.801 A n 36028-M 360254 5739-F 307942 309643 309644 �- A --36026-M — Feet 282705 36027-M 0 2,500 5,000 01 06 . Figure 2 Map Legend Study Area with DWR Wells NCCI Pit Study Area DWR Constructed Well (Well Type) Property Boundary A Domestic/Household use only A Municipal/Commercial/Industrial NCCI Pits 0 Irrigation NCCI Pit 0 Stock Weld County, Colorado A Monitoring/Sampling Sources: Date:November 13,2020 �1 t �■�/■,� r Q CDSS Well Permit Database 06.07.2020,J&T Consulting Datum/Projection:NAD83/Colorado State ■ ■ Lr Water MW/Pit Location Drawings,NHD(photorevised),ESRI Plane North,feet Engineering,LLC World Imagery(2018) Page 18 of 35 67W 66W T^ . r . MW-R5- 1 MW-R3 MW i 7Z4 . li,ji . tt-0 — MW-10 MWZ3_Ip ,I\MW-R1 . ' .. . I o / l a OMW-09 I pb °d ' . MW-Z2� i ,,.�. z b, o oI i. MW-11 �� O � MW-Z1� o � - = --_ _- - MW-Z5 0 MW-07 MW-Z7) MW-12 W-Z6` a W-14 .., MW-13 W-14 26 2 ®W 05 _ O { �..� _o{ MW-15 ;., , 10! MW-04 I,. O ) i ' . , r I, MW • I� 1 `; u ,, • ii MW-01 Ij ,,, � o il I oa MW-02 10 i !. - a ", 10 iii •. . 0 y I _ .., ' 914 Creek ...- , 4; : ,.. tlf, _ 1 * fib'; O O _ O o `9 03 0 02 2,500 � _ 1 �11."'"'—._,.0" Figure 3 Map Legend Monitoring Wells Property Boundary o L.G. Everist Monitoring Well NCCI Pit Study Area 0 City of Thornton Monitoring Well (Z Wells) I I NCCI Pits 0 Rankin Monitoring Well NCCI Pit 1 I Adjacent Pit o NCCI Monitoring Well Weld County, Colorado CDSS : Date: /Promber 13,2020 s t M c G ra Water CDSS Well Permit Database 06.07.2020,J&T Consulting Datum/Projection:NAD83/Colorado State -'-'-� MW/Pit Location Drawings,NHD(photorevised),ESRI Plane North,feet Engineering,LLC World Imagery(2018) Page 19 of 35 67W 66W N ' W- - �,�� .ti a._ • N\„Nc.' - . r: 4 cP 3111 i`- o \ "t 0 �, y 3 .a. \ o. .' 1 �_ t Ii 6 z Figure 4 Figure 4 . N Lining Status Operator Pit Name _ - - - _ ID Group . NCCI- Illaillit - 1 To be lined NCCI NCCI-South Pit South Pit 1 NCCI- To be filled 2 NCCI NCCI-North Pit North Pit with fines 3 Northern lined Bestway Lupton Meadows 2 9 10111P � / 4 Northern lined Pioneer Heit 16 5 Northern lined Weld County Koenig .',_h 6 LGE lined L.G.Everist Blue Ribbon 19 18 7 LGE lined L.G.Everist Swingle North 1 7 '- ,,,a/e".: 8 LGE lined L.G.Everist Parker-Panowitz j • 9 LGE lined L.G.Everist Swingle South i. . - ' 10 LGE Unlined L.G.Everist Sandstead '- 1 • 11 LGE lined L.G.Everist Hill-Oakley - -• ^ J 12 LGE lined L.G.Everist Fort Lupton West OtV Creek .4. . 13 LGE lined L.G.Everist Fort Lupton East �,sNe - --- 14 LGE lined L.G.Everist Golden Site - 15 LGE Unlined L.G.Everist Deep Lake Ilk . 16 LGE lined L.G.Everist Meadows North Lake • ',, �., hi. - 17 LGE lined L.G.Everist Meadows South Lake - 18 LGE lined L.G.Everist Meadows West Feet 19 LGE lined L.G.Everist Vincent West - _ - - 0 2,500 5,000 z Figure 4 Map Legend Pit Modeling Groups NCCI Pit Study Area Pit Modeling Groups U Property Boundary Northern Lined Pits LGE Lined Pits NCCI Pit LGE Unlined Pits Weld County, Colorado Sources: Date:November 13,2020 J&T ' C C ra n e Water J&T Consulting Emails,NHD(photorevised),CO DRMS Datum/Pr/Projection::NAD83/Colorado State Database.ESRI World Imagery(2018) Plane North,feet Engineering, LLC 67W 66W N o f' 1q8 _ • r, N./.5i 18 rtll�`� ` -n y n • -, .q• - „ ,e..--; • — =r r;,. I I - _ • \ o tt 17 3 r'J 3z 23 \ , I 19 .* \_• 4 N ig1 l: ----,ai ` `` I Mr. ~ �-''1` — aiir yr • _► _. , `6 e 'a maltillVia;; itar • ' •"-4 II ." ' ) il 1r r..' 4. PI ' ' /. Pt 34 35 "�_. --36 t' T .. i.. r Feet 3,000 6,000 Figure 5 Map Legend Water Level Changes Resulting I J Property Boundary Change in Water Level (feet) NCCI Pit and Adjacent Pits from North Lined Pits -"\-. Water Level Decline I I Northern Lined Pits (without NCCI Drain) NCCI Pits 'v No Change I I LGE Lined Pits Water Level Increase LGE Unlined Pits NCCI Pit Weld Count , Colorado Sources: Date:November 13,2020 r F cG r 1 1 Y e Water rate r J&T Consulting MW/Pit Location Drawings,NHD Datum/Projection:NAD83/Colorado State (photorevised),Modeling Contour Exports(20201112) Plane North,feet Engineering,LLC ESRI World Imagery(2018) Page 21 of 35 67W 66W N -. 08 _ W�1-•E . ,f•w•. ' 1 ._0 �� _ `r, f ` 17 �� •o - _ om---' _ 1 I-lI \ Y� . , ' ---....i . 1 5 1 -_..._,L,LI I f„...._____j Ici ' _ I I I I 3z 23-..* ' 1 —— 1 _ -- 't 1 I I 1 , zxt 3 --5 — N-4..I4 _- 4, _ . , . r r -r .- r Clq \� e uo i S Y 5 `` •.-. .-27..ir .....-..--,..—26_ , ______v_ . // jr:_r, I? HH ��' _ q ‘o ^ram . __ . „. e / �` I r Lot- ppy - - T.. ! M fir, /.' 5 / J Ar, i or_; pip .., , 34 - 35 - -- 3. a 31 r":1 l it e ., ti / 3,000 6,000 Figure 6 Map Legend Water Level Changes Resulting I J Property Boundary Change in Water Level (feet) NCCI Pit and Adjacent Pits from Existing LGE Pits (without NCCI Drain) NCCI Pits "''\-' Water Level Decline I I Northern Lined Pits 'N.- No Change I I LGE Lined Pits Water Level Increase I I LGE Unlined Pits NCCI Pit Weld Count , Colorado Sources: Date:November 13,2020 F l cC ra r�.. a Water �Yrate r J&T Consulting MW/Pit Location Drawings,NHD Datum/Projection:NAD83/Colorado State -- II�I� � (photorevised),Modeling Contour Exports(20201112) Plane North,feet Engineering.LLC ESRI World Imagery(2018) Page 22 of 35 67W 66W N - - / 2 i• 08 W--.� C ` r o r, 18 ; ^ ` • .. 4 - . - ..2 ( . D r - . flp. :'• I I 1 I / _ 4 441. - ��av . .,....._• . , . 1 . s _ _ft!I �_ e- - w 34 — 36 i ,11*- it0.2, i` la c W i Feet J I ,i. i • : c . 3,000 6,000 •1: ,,', Figure 7 Map Legend Water Level Changes Resulting I� Property Boundary Change in Water Level (feet) NCCI Pit and Adjacent Pits from NCCI Lined Pits -"\-. Water Level Decline Northern Lined Pits (without NCCI Drain) NCCI Pits .\, No Change LGE Lined Pits Water Level Increase LGE Unlined Pits NCCI Pit Weld Count , Colorado Sources: Date:November 13,2020 Alb Y Fl"C ra n'e Water rate r J&T Consulting MW/Pit Location Drawings,NHD Datum/Projection:NAD83/Colorado State (photorevised),Modeling Contour Exports(20201112) Plane North,feet Engineering,LLC ESRI World Imagery(2018) Page 23 of 35 67W 66W N f' 1 08 W--.&-- C -" I - ,+, PP ' � r 18. r, - - -• 17---- — t 1 t • n 0.�� r -- - -- '.23." - I——I I %RI` — - 111111 / 1 Ej t _ ._- + 29 , , i Iii '0-.5 .,, .-- 4 0T1 v • ( p . A ( . PI' " -:-.-..---.' • -- '. 14- - ..-ir-Li itt.: -—— ,:jlt 411,pi r �-- ^ e + .p • • .,-,., _ ;__ , .; _ , .., .„..,,,„, ,_.,: .•.F ILLA r...1 tip "lye I ' ' �4 it —.. $ i. —'� 34 - 1 35 —- 1 f !-> + L__ �{ s _ _ 1 / Y \ >.s1 - 1 .' ty �, qyA • Teti � � - y x, lrl�' • �r Figure 8 Map Legend Water Level Changes Resulting I— Property Boundary Change in Water Level (feet) NCCI Pit and Adjacent Pits from all Existing Pits - 1%, Water Level Decline Northern Lined Pits NCCI, North, and LGE NCCI Pits 1%, No Change LGE Lined Pits (without NCCI Drain) Water Level Increase r LGE Unlined Pits NCCI Pit Weld Count , Colorado Sources: Date:November 13,2020 �k' ■�/■,� r^� Q Water J&T Consulting MW/Pit Location Drawings,NHD Datum/Projection:NAD83/Colorado State ■ ■ �. Lr ! .� �..+ (photorevised),Modeling Contour Exports(20201112) Plane North,feet Engineering,LLC ESRI World Imagery(2018) Page 24 of 35 67W i 66W illk W_b) E 148s8 ! 4650 _ I I it* '�` 48s? / - i I • /I I1 1 (Ilk:J ' 1 , I 484 \,.......\ - .. 4868 '''---7-- i: -- I 1 � 4859 46 8, cree` 486.. I 486a I ve,6 1 P' ed, 7 0 o GP 1 LI ' 2 GO 31. P. C T Lo J 1 co -41111111k N rr j �1 Feet t 0 1,.:• �Z000 Figure 9 Map Legend Baseline High (Summer) 1_, Property Boundary NCCI Pit and Adjacent Pits Water Table Northern Lined Pit ''-' Water Table Elevation Contour LGE Lined Pits Contour Interval = 1 foot Note: LGE Unlined Pits NCCI Pit Map created from simulated July, 2019 water levels without NCCI pit Weld County, Colorado pumping but with other lined vicinity pits. Sources: Date:November 17,2020 /II c 1 L1�e Water J&T Consulting MW/Pit Location Drawings,NHD Datum/Projection:NAD83/Colorado State (photorevised),Modeling Contour Exports(20201112) Plane North,feet Engineering, LLC ESRI World Imagery(2018) Page 25 of 35 67W i 66W ./11 / 4845 - I . - / / . W—.60)-- E /___r__v,ZK---rr----------j___/ - itt '\\,\\ . , .14 ,,,, . —;"-- '/'i' 25 Z(-,1 •t . \\\\,.,\,\\N\-„\\ /:/1/ /-/----/-/( `� //.,7,/ c,\s\\. i\•„,i,I,.A,, I, , .,'''1'1',I N.II.:,C .1,, ', _t.t.11 I1'1I,d. — -— -if\sltwq4,.... p—,„.\„0\,—_--,,-.i i'II--. 0 1(:\/\ , ________ ' t4845 \ �� W O n A 0 0 M �� ',MW_1 � \�, AB3C) 4852 :,, , , i. tcreek 46 ocn ' \\\,\\ 7,/ i/,'' `'' ,, t4848 'Vtli 4)t" \ firill f lit i \ L ilk -4 ' - li' r i' MW-Z2 ' , t1 4861 y- �� II 1 A ,� q M W Z1 ,. 4861. �N 4850 4845 1=- 840_-'' r F co o - 1 INV � _ �/ . _ - -- \ Nitiii \ N k\\\\\\\\ \ • , Feet 0 1,000 2,000 Figure 10 Map Legend NCCI Pit Dewatering IL. Property LI, Monitoring Well Measurement NCCI Pit and Adjacent Pits Water Table - Boundary (July,2019) Irrigation Season (Summer) '— Water Table Elevation Contour Northern Lined Pits Contour Interval = 1 foot LGE Lined Pits NCCI Pit Note: LGE Unlined Pits Weld County, Recent data shown from nearby monitoring wells at red symbols. y Extracted from transient model for July, 2020 time step. Sources: Date:November 13,2020 4 � J&T Consulting MW/Pit Location Drawings,NHD Datum/Projection:NAD83/Colorado State -- (photorevised),Modeling Contour Exports(20201112) Plane North,feet Engineering, LLC ESRI World Imagery(2018) 67W 66W I N W--,50"— E '`, S II I I . 4j zo 1 • 1 I 0I 20 1 L 1 20 __ , I _ o Io Le) `4 1c'r N a�O7 eOf rO/7i0.r ch m o Q li N Pc reek _ _ l • • t . / (I • two 1-- ' o 1 -———-1 • r i' • V 1 Feet 0 @00 1,200 Figure 11 Map Legend NCCI Pit Drawdown 1 J Property Boundary NCCI Pit and Adjacent Pits Irrigation Season (Summer) North Lined Pit Water Table Drawdown Contour(ft) Contour Interval = 1 foot LGE Lined Pit NCCI Pit Note: LGE Unlined Pit Weld County, Based on MWE"Baseline" Summer Water Table(Fig.9)-"Dewatering" y Water Table(Fig. 10). Sources: Date:November 13,2020 ■�/■,� r Q Water AT Consulting MW/Pit Location Drawings,NHD Datum/Projection:NAD83/Colorado State t4 ■ CC■ a n e ! .ate r (photo Imagery d),Modeling Contour Exports(20201112) Plane North,feet Engineering,LLC ESRI World (2018) Page 27 of 35 67W 66W N\ 1\ \ +f 1 r `S II \f -I� ' --- I \\ \\\\\ - Itt_ i \-, ▪ `„,_ '.-----------.7----------------- \\\< \:1"--,..\\ \ - --_____ K ' voe, N\ \ \\\\\\\\ \\\\\\\\\\\,,, \\\\\\\\\\, , r________,,,__„,_,,,,_.: z '% AY; // ';\\IN,, I\INN\ ! \ Ii ( \\44 s\\ LIF II / \\LI \ \ \____------' I1 ` ', ' L 4 4 I4 41\\, A00 CP O CPS ' Feet 0 \Ili' 1,200 Figure 12 \ Map Legend NCCI Pit - Summer Water Table IL Property Boundary NCCI Pit and Adjacent Pits with Liner (no drain) Northern Lined Pits '\. Water Table Elevation Contour Contour Interval = 1 foot LGE Lined Pits NCCI Pit L LGE Unlined Pits Weld County, Colorado Sources: Date:November 13,2020 41 k M eG ra ue Water 1&T Consulting MW/Pit Location Drawings,NHD Datum/Projection:NAD83/Colorado State -'-- (photorevised),Modeling Contour Exports(20201112) Plane North,feet Engineering,LAC ESRI World Imagery(2018) Page 28 of 35 67W 66W N _ o • _ W-46— L - -1! I Ah . • I 05 \/ • r`r' ff ° ` ' .�' -o b .. • - - - , G - 3z 23 .z. , . I _ \` t 1. 19 * G I --,, it. „„10,..„4_. s_.. ,, , ,. •..._ _ ... _____ .414, Ni ig \:- _. 2t...„ $11.: ,----,c.i ' P--- JET .1 • ultilt . . e . , ,.1, e r 11111111t ft -yam/ I' ,�11111M , ( ti . I- Pr - ' - �.. Mil _, �,, - - i ate, -- - ! pot-- • . , -sr _ , _ -i- , . . 1 ill 3. ,..� / 31-, . -r ` .32f • * 1� ' + / ' La+ Figure 13 Map Legend Summer Groundwater Level IL. Property Boundary Change in Water Level (feet) NCCI Pit and Adjacent Pits Change Caused by Existing pits '1. Water Level Decline Northern Lined Pits (with NCCI liner, but no drain) NCCI Pit ' -• No Change LGE Lined Pits Water Level Increase P LGE Unlined Pits NCCI Pit Weld Count , Colorado Sources: Date:November 13,2020 �k' ■�/■,� r Q Water J&T Consulting MW/Pit Location Drawings,NHD Datum/Projection:NAD83/Colorado State ■ ■ Lr ! .� �..+ (photorevised),Modeling Contour Exports(20201112) Plane North,feet Engineering,LLC ESRI World Imagery(2018) Page 29 of 35 67W 66W N • r W� �E `; 04�� 0 A4 :4,28 Pr -N -- - I ice\ •Jw. - c. a� --I \\ �_ �/ o i 0.5, 3 a` ' i \ — / —\ b1 / ♦ • r 1 I zi I _ _ _ I N _ 1 \\\\ \ ` Ii / if 1 _ _ I 1 1 1--) z • f . . . z , \ \ . i "� / \ / / 25 • 1/111- �— Feet illis 3 —6 - I 0 1,200 2,400 Figure 14 Map Legend Summer Groundwater Level IJ Property Boundary Change in Water Level (feet) NCCI Pit and Adjacent Pits Change Caused by Existing pits -.. Water Level Decline Northern Lined Pits (with NCCI liner, but no drain) - -\_. No Change LGE Lined Pits Zoomed Water Level Increase LGE Unlined Pits N Contours CCI Pit Notes: Curs show water level change in feet(model simulation)for summer(high)water level conditions. Weld Count , Colorado Red contours show decline(shadowing),light blue contours show rise(mounding). Sources: Date:November 13,2020 , i ' CG ra n e Water J&T Consulting MW/Pit Location Drawings,NHD Datum/Projection:NAD83/Colorado State (photorevised),Modeling Contour Exports(20201112) Plane North,feet Engineering,LLG ESRI World Imagery(2018) Page 3 0 of 35 67W 66W T, \ ' \ \ -.._ „ . ` � s W� �E 11 1\. \ .9 °r I \ \\ , �_��. 484, Aid,,,P S 'Piet L \ -- ----- - -\-' " '. '' ' . \ 1 1 I --________ ---"'-`,,-,,.„,,,,._:::,,,..i v v ' l' _ f r �\ 4gs0 % 111 - \\. y' , ca 1 1 oar° j 1 AP ,\( o � I 1 i , ` L K..--\----sk\A\ --1.,‘9 , 1 \NN,,,,\T ____. _,_ • /(:\\.\\:\\\\\1 1 \ , � ll• ..• \ o \ I. II y I. �1 ` \y I1\,5 l J \\\N„. i\\\\\s. J: _!alli, �/ Feet \\\\ 880*'� ; 0 1,200 2,400 Figure 15 Map Legend NCCI On-Site Drain - IJ Property Boundary '..' Water Table Elevation NCCI Pit and Adjacent Pits Summer Water Table Contour Flow Direction Contour Interval = 1 foot Northern Lined Pits LGE Lined Pits = Perforated Drain NCCI Pit = Perforated LGE Unlined Pits Weld County, Colorado Re-Infiltration Pipe Sources: Date:November 13,2020 cG ra n e Water J&T Consulting MW/Pit Location Drawings,NHD Datum/Projection:NAD83/Colorado State � (photorevised),Modeling Contour Exports(20201112) Plane North,feet Engineering,LEG ESRI World Imagery(2018) Page 31 of 35 67W 66W N e1 11 s W�&�E ci I • ;., _ -- ��_ Aid f,, S ;� PRi \ , r r _ .-A,. \ 4/ i' .0 11111 / I' 1 '..\ / V s,.. / p / 1 0 L_ _ O. I 1 I I z _1� 1 I ', I II o . • 7i0, //./ . - I \ 41140: -4 Feet 0 1,200 2,400 3 a �� i.4 Figure 16 Map Legend NCCI On-Site Drain - IJ Property Boundary Change in Water Level (feet) NCCI Pit and Adjacent Pits Summer Residual Drawdown Flow Direction ^-' Water Level Decline Northern Lined Pits '\. No Change LGE Lined Pits T Perforated Drain Water Level Increase LGE - Unlined Plts NCCI Pit — Perforated Note:Calculated by subtracting on-site drain run elevations from Weld County, Colorado Re-Inflitration Pipe baseline summer water table(Fig.15-Fig.9). Sources: Date:November 17,2020 J&TC1 a n e Water J&T Consulting MW/Pit Location Drawings,NHD Datum/Projection:NAD83/Colorado State 14,� (photorevised),Modeling Contour Exports(20201112) Plane North,feet Engineering, LLC ESRI World Imagery(2018) Page 3 2 of 35 Figure 17 — Modeled Seasonal Drain Flow Jan v oRI Dec u aa'`o WI Z m Nov ro w 3 L - c) ai Oct N co .ca L ,.. . a ° ca a`, o a`a, I Sep — a E o0 0 Aug ai E 'C. VI — E a J .° Jul a - fO TxToE - m o v • Jun ro 3 a7 Q x ;: V o � o May co ro w _ o Apr N 0 E tO 4-, N 0 0 - '-1 v -- - Mar -p ,. a to c c c - 'a v ° Feb73 �° o a w o E Jan CV' m w id t N ;, _m Dec V, ba 47, al +' t . 7 z°I� � ° Nov co • Oct >- 4- 0 • - - Sep ai E Aug H l �_ t Jul May 4 Apr - _ .1, g r— _.„..____. �__ ✓ =- Mar +7j, •irv" 6011' Ver i- ^ Feb _ Jan 8 F 8 FA 8 u 8 u 8 F 8 8 L 8 51 c 0o N. N. Lo Lo 1.r1 Ln 'cY rn M IN rV .--I I-1 (wd2) aleb MOij McGrane Water Engineering,LLC 1669 Apple Valley Rd. • Lyons,CO 80540• Phone: (303) 917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 3 3 of 35 REPORT TABLES Table 1 —Pit Group Impacts Figure 1 ID Figure 1 Group Color Operator Pit Name 1 NCCI -South Pit NCCI NCCI -South Pit 2 NCCI - North Pit NCCI NCCI - North Pit 3 North -lined Bestway Lupton Meadows 4 North -lined Pioneer Heit 5 North -lined Weld County Koenig 6 LGE-lined L.G.Everist Blue Ribbon 7 LGE-lined L.G.Everist Swingle North 8 LGE-lined L.G. Everist Parker-Panowitz 9 LGE-lined L.G.Everist Swingle South 10 LGE-Unlined L.G.Everist Sandstead 11 LGE-lined L.G.Everist Hill-Oakley 12 LGE-lined L.G.Everist Fort Lupton West 13 LGE-lined L.G.Everist Fort Lupton East 14 LGE-lined L.G.Everist Golden Site 15 LGE-Unlined L.G.Everist Deep Lake 16 LGE-lined L.G.Everist Meadows North Lake 17 LGE-lined L.G.Everist Meadows South Lake 18 LGE-lined L.G.Everist Meadows West 19 LGE-lined L.G.Everist Vincent West Source: J&T Consulting, LLC,personal communications, June-July 2020 McGrane Water Engineering,LLC 1669 Apple Valley Rd. • Lyons,CO 80540• Phone: (303) 917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Page 34 of 35 McGrane Water Engineering APPENDIX A - HYDROGEOLOGY BACKGROUND This memorandum involves evaluating the hydrogeology necessary to create the data sets to build a groundwater model. Details on how the hydogeologic data sets are translated into model data sets are discussed in more detail in Appendix B -Modeling. Available Data We compiled hydrogeologic data from: • Existing reports from the U.S. Geological Survey and Colorado Division of Water Resources (see Sources below); • Well permit completion reports from 148 registered alluvial wells and 61 permitted monitoring wells available from the Colorado Department of Water Resources Well database (CCDWR,2020); and • Water level data from monitoring wells located around the NCCI pit provided by J&T Consulting, Inc. Figure Al shows the plotted well data with CCDWR permit number. The well data (Table Al) includes: PLSS location, depth, yield (gpm), water level when drilled, and depth to bedrock and saturated aquifer thickness calculated from USGS DEM elevation data and geologic logs (if available). Most of the CDWR wells are used for domestic water supply, with a few for municipal, irrigation, stock and monitoring uses. Water well depth to bedrock range from 20 to 73 feet and average 43 feet, and well yields range from 4 gpm for domestic wells to 2000 gpm for irrigation wells. The depth to water ranges from 2 to 40 feet and averages 15 feet. The calculated saturated alluvial thicknesses range from 2 to 50 feet and average approximately 26 feet. We segregated the water well data from the more recent monitoring well data to see if there was any difference between older wells and more recent monitoring wells (typically installed around more recent gravel pit construction, which are more likely affected by dewatering. On average, the depth to bedrock is 35 feet (8 feet less); the depth to water is 12 ft (3 feet higher); and the saturated aquifer thickness is 32 ft (6 feet more). Based on this comparison, there is no indication that there has been any significant dewatering of the aquifer since prior to gravel pit development. Figure A2 shows the location of nine monitoring wells belonging to NCCI (green), four belonging to the City of Thornton (orange) and fifteen belonging to LG-Everist (blue) who owns over a dozen gravel pits located south of the NCCI pit (shaded). Other non-LGE pits also shaded exist north of the pit. Determining which well permits (Table Al) correspond with pit monitoring wells was not in the scope of this study. McGrane Water Engineering, LLC Page A 1 of A-15 1669 Apple Valley Rd. • Lyons,CO 80540• Phone: (303)917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com HYDROGEOLOGY Figure A3 shows the surficial geology (Soister, 1965) from the Platteville and Fort Lupton Geologic Quadrangles. The surficial geology consists recently deposited sand and gravel alluvial deposits (Qal and Qrg) located adjacent to the SPR river channel and are considered to have relatively high permeability. Older terrace alluvium (Qss, Qs, Qrf) borders the younger alluvium outside the modern floodplain. Together, the floodplain and terrace deposits make up SPR Alluvial Aquifer. The Little Dry Creek (LDC) alluvial aquifer consists mostly of alluvial sand and silt (Qss) with narrow band of Qal adjacent to LDC. The lack of Qal beneath LDC implies a relative lower permeability. The alluvial aquifer is bounded by the relatively low permeability Laramie and Dawson bedrock formations. Minor windblown eolian sand (Qes) and loess (Ql) deposits overly both bedrock and stream alluvium and contribute precipitation recharge directly to the SPR and LDC alluvial aquifers. Predevelopment Water Table Map We used our steady state groundwater model to create a representative pre-development water table surface. The water table is strongly controlled by the elevation of the SPR and LDC as described in Appendix B — Modeling. Figure A4 shows how the model results closely match predevelopment contours produced by the USGS (Robson, 2003) along with the available data from the State's database (CDWR,2020). The steady state water table was directly used to: • Calculate the aquifer saturated thickness discussed below; • Determine long-term impacts caused by various pit groups; and • Used as input into the transient groundwater model(discussed below)to evaluate seasonal conditions and estimate perimeter drain flow. Groundwater flows perpendicular to the contours and general toward the river. The contours show that the water table generally flows from the northwest to the southeast across the model area at a gradient controlled by the river. Overall, the water table drops from an elevation of approximately 4920_feet to elevation 4830 ft (90 ft) from south to north. A steeper gradient (closer contours) comes from the west through lower permeability terrace deposits. McGrane Water Engineering, LLC Page A-2 of A-15 1669 Apple Valley Rd. • Lyons,CO 80540• Phone:(303)917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Top of Bedrock Elevation Figure A5 shows the calculated top of bedrock elevations calculated by subtracting the depth to bedrock reported in well logs obtained from the State's well database. The calculated values are typically within 5 feet of the contours derived from the SPDSS groundwater model. Aquifer Saturated Thickness Figure A6 shows saturated aquifer thicknesses values where well logs are available in the CDWR database. The value is calculated by subtracting the depth to "bedrock," from the reported depth to water. Greater than(>) signs are used as prefixes for shallow wells that were not drilled deep enough to encounter"bedrock". The saturated thickness contours were obtained by subtracting the bedrock surface elevation of model cells (Figure A5) from the steady state model heads (Figure A4). The contours show that the saturated aquifer thickness around the NCCI pit ranges from 30 to approximately 35 feet deep and is generally the same beyond the SPR. Aquifer Permeability/Hydraulic Conductivity(K) Aquifer properties were chosen with guidance from values published in the South Platte Decision Support System (SPDSS) groundwater model (CDM-Smith, 2006). The SPDSS used contoured K values increasing from west to east across the alluvial aquifer. In the southern study area, the K of the LDC alluvium progressively increases from 350 ft/day to 550 ft/day beneath the SPR. In the northern study area near the NCCI pit, the K of the SPR alluvium increases from approximately 550 ft/day to 600 ft/day toward the SPR. We initially used a uniform value of K = 550 ft/day for most of the alluvium with a saturated aquifer thickness greater than 20 ft, but lowered that to a uniform K= 350 ft/day during calibration of the transient model. Calibration also led us to lower K to 200 ft/day along the west edge of the alluvium (terrace areas) and to 50 ft/day for the eolian areas to the west of the alluvial aquifer. For the transient model, we set specific yield (Sy) = 0.20 and found that it worked well for the transient calibration. Figure A7 shows the K values used in the transient model. REFERENCES References are included in the main body of the report. McGrane Water Engineering, LLC Page A 3 of A 15 1669 Apple Valley Rd. • Lyons,CO 80540• Phone:(303)917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Appendix A - Figures McGrane Water Engineering, LLC Page A-4 of A-15 1669 Apple Valley Rd. • Lyons,CO 80540• Phone: (303) 917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com 67W 66W - . 03 N 47721-F 57544-MH . •_ . - 48356. • 258578 258579 W�&� E = 55652-MH r 57WC B 258576 /50354-F 1( S 6222-R-R 0136-R 25857•7� " 55651-M H 67987-F 281883 305222 305223, 281884 8 YT 303766 258570 281885 303765572 9495 14184 258571 48616-M H 124264 249322 72389 56•WCB 707-WCB 16382-R �1 38366-A n 124264-A ,258575 0 G •271445 9723 271446 0 10279 9722 258573 1630•R-R 16238-R 224912 0 A 9524-F C rt174064 �� ' 231762 ,�� 224909 �258574 153020 22418U 224910 :11328 11111 24911 284�7 6637-R-R 10811-F 12596-R 741-WC: '' 298765 �' 5746•F 6637-R 153021 28003•A 259390 t. - I 22 162219-A I _ 221 ' * 283954 142770-A 6638- 283953 25 389 243779 1 • 275779 0 J '1+ �� 244547 6639-R 263722 • 59807-M H 185928 46392 20843-4, 291633 N ,� 259388 59806-MH 259391 �, L in`� 259387 93439-A 46415 222341 A AA 157913 6820 R :, 264637 � 12670-R 156312-A 276601 ,n, 118419-A 98, 47204. 259383 292788 259392 93439 23110 /239875 261574E 80437 115196-A 4234-F 45751-MHz 6231-R 22612-F-R 57957•F 58545 F 215110-A ,r 259386 259384 .� � A A ,• 151399 11082-F-R A • 151398-A 297892 n, 297891 259393 881-WCB 58544-F 259382 58541-F 146- 297890 721-WCB A 58543-F • •"A 255459/A 147779-A• 24644 5854 0 259380 6912-F '�147779-A 0 291814 11170-R ` 259381 '- 24643 148826 A 58540-F 25158 183741-A 183741-A 226861 76071-F 25158-A 6229-R 945-WCB © 6818-R-R 20306-F 12883-R 266486 20305-F 15680 104531-A 198087-A 12221-F 12884-R 266881 267441 254301 14439 1050-R /;\ • /18832 63203 190138-A z 36023-M 485671048-R 307941 A 307943 36030-M 288726 �14807-R-R ocy Cree 29915 9527 307945 36033-M n 75962-F - cue ti 13093 307944 10030-F ® Q A 36021-M N i G L .A L'-. 36022-M 9120- Q 81, 1111= 1049-R i; -.801 A n 36028-M 36025-36024-M • M 5739-F 307942 309643 309644 �- 0 36026-M — Feet 282705 36027-M -1 0 2,500 5,000 01 06 Figure Al Map Legend Study Area with DWR Wells NCCI Pit Study Area DWR Constructed Well (Well Type) I I Property Boundary A Domestic/Household use only . . Municipal/Commercial/Industrial NCCI Pit O Irrigation NCCI Pit A Stock Weld County, Colorado . . Monitoring/Sampling Sources: Date:November 13,2020 �1 t �■�/■,� r Q CDSS Well Permit Database 06.07.2020,J&T Consulting Datum/Projection:NAD83/Colorado State ■ ■ Lr Water MW/Pit Location Drawings,NHD(photorevised),ESRI Plane North,feet Engineering,LLC World Imagery(2018) Page A-5 of A-15 67W 66W T^ . r s MW-R5- 1 MW-R3 MW i 7Z4 . li,ji . tt-0 — 0MW-10 MW Z3_Ip I MW-R1 - ' - I o a / OMW-09 P b od . MW-Z2� i ,,.�. z b, o oI i. MW-11 �� O � MW-Z1� o � - = --_ _- - MW-Z5 0 MW-07 MW-Z7) MW-12 W-Z6 a MW-14 .., MW-13 W-14 26 2 ®W-05 -O P i41-.... _0{ MW-15 ;., , ! MW-04 I,. O ) i ' . , r I, MW Z. I� 1 u ,, • IliMW-01 Ij ,,, � o il I oa MW-02 10 i !I.. - a `, 10 . 401 .ir— iii •. ' 0 y ' 914 Creek �- , 4; : ,.. tlf, - _ .., ',�Fat O z 03 i 0 W 02 2,500 5,00 1. �11.�— 0 .0" • o Figure A2 Map Legend Monitoring Wells Property Boundary o L.G. Everist Monitoring Well NCCI Pit Study Area 0 City of Thornton Monitoring Well (Z Wells) 1 NCCI Pit 0 Rankin Monitoring Well NCCI Pit �I Adjacent Pit o NCCI Monitoring Well Weld County, Colorado CDSS : Date: /Promber 13,2020 s t M c G ra Water CDSS Well Permit Database 06.07.2020,J&T Consulting Datum/Projection:NAD83/Colorado State -'-'-� MW/Pit Location Drawings,NHD(photorevised),ESRI Plane North,feet Engineering,LLC World Imagery(2018) Page A-6 of A-1.5 67W 66W -._ r N fti i. • ,). ti 1 _ 1 , ..k.ollatiro W--.&.--E - 1,.. 'isc or,,,, f) °"1? � e1I. m '' a ( 4 7 QSS KI S ,; QUA QaI "hi - • r) 1 ls�,. Qes s bi'''''(111111' l - - n r . KI z , KI � s gal Qrg ' 1\ aoaga Qrg f 1 , i� is 'I� t�) ' ----�5 /ir 1 j °. �� /, J 1Kdw I Y / . nee. .. \ 1. ___,'"'• . ' il. ' ,,f..'" - ......., {!' n ti5 { C '1 � \:. ( f v ,_ h . Qes i'`Q[ LN— P3 �.`".' K I i t LL aG� r''l Qes 4 J ft S "I b , , r ' 4� Kdw sN 22t I - r' - Q' y ir;1 pr E J, r �� , Y p. . � �Q ) A (. K W — 3;1,,, solo t ii, . qw � Q. o O 4 e F ka- � -' • 'Am`. r�ro erScY Qss a0i s. -', ' \` V,, "•., I' ); ,i: \ yam Q '� Qes .�°� / / r 1 o r t S` !r I - C— >- o 26 5 // ,— ` Qrg 29!` - ._1 urmv�a.wr ca , )..._ ', ',71', _ Qes L.P.AP.:_err. t,..J.. , /6 F.........T. ,.a'i° 1 \t,- •,.. k F -, 1 f �i_- •u A' / Qm .a . I�\r\L L ilk \ f 'V 4 — ': %...> i--s II; ` 55 :.:_ ^.mr. �+ "P F,p . r `32 a Q2Sz- �'o mod . r---. I + � Jy ` Q f' -. ''' " U r sa C LupOn Kdw _ o�. \.. Z � /" Art:.: -,a,,' r Kdw 1_ . ,. Qrg 4ia p� s „Feel,._ Kdw-' air• "' 0 Ii .1., 4,000 I .8,000 Figure A3 - Surficial Geology Map Legend Geologic Units Qal -Alluvium From: Soister, I., Property Boundary 1965 Qes Eolian Sand Qss -Alluvial Sand &Silt Model Boundary Qrg - River Gravel QI - Loess Qs -Slocum Alluvium NCCI Pit Qrf - Rocky Flats Alluvium Weld County, Kdw - Dawson Formation Y KI - Laramie Formation sources: Date:November 13,2020 t'w M c ra n e Water J&T Consulting MW/Pit Location Drawings,Soister(1965)- Datum/Projection:NAD83/Colorado State Platteville and Fort Lupton Geologic Quadrangles[USGS plane North,feet Engineering,LLC Maps GQ-397 and GQ-399] Page A-7 of A-15 67W 66W N N ' \ 0, AJ8¢ 0 = County Road 22 5 ,5,, W�&--E % \ Ico S \ \ ."5„. 4`839 a\p9 >? t 20l >? p0 _4842 n P �0,% ` 4839 P.CP 0 861 4846 4842 r 4843 4840 - I 4849 4849 \ A 4850 4®485.0®414850 4841 `\ ,\ \\ A 8 48 0 483 4846 4850 ® 840 `` 14857 I \ 4857 ♦j 4853 847 Ii county Road zo \ ` 4852 Sryl�( 4.4 • 4850 4837 ,ini,t,.,� ,,, _ 4850 --1 4857 / , \ °'o \ 4 \ 4849 4851 48 4849 / 'f00 \= \ 4860I4850I A .ik o'I / ‘\ 600 4 I 1 483 9 4858 4849 1 ® l • 486 lIl / i \ _o 4856 t --0" County ad 18 1 N. ^i o0 4898 9 4862 A 4860 4851 j Or �a81 .5000,, 4922 4850 e 8 fi 4862 t I 4854�8,74.811 (� County Road 18 - `" , 19°6 14848'66 4865®4867 A 4862 487 486 4864\`,1 4868 4890 4829 4865 \865 I5 \r/69 • 86 y 4A 4A 67U.873 4873 4864 4' 4870' till 4863�A A 4867 I 4856 _. --A 4870 - o 4869 4869 4 1 4875 \ n4880 '''A 4870 4873 I s I 49(00/4865 4876 4871 A 4873 A 00 / A 4865 = -062 A1873 O 0` �a 4893 A 4867 A c,_un, Ro)o'I , \ C. 4915 48. 4865 f /4872 / . A 4868 i 48 i6 49�1 4877,-1 4879 4878 / 4877 AO // _ 4908 A 48r84 4876 487 4869 �49081 4900 • 88 4890 4880 ® 04867 /12' V -,.r 491' — • r 4877882,A;80 i.:i /_ 18834890. ® 488648 6 AA 1 4930` reek 487: 48734890A4885 . 4887 248 wo o \ 4917 4875 /4'886; 4888 to O.0ti 4925 486 4891 4882 ' 4889 Co u y Road ® ,'.$$$ 4886 —A... 4890 - .. Co to creak Z 0 0 _ _'' G Caursa ` a 0 Feet 0 3,000 ghw 6,000 I .Hicinineay�2— --30hwaY•52 __— - G,,.r i .•,tr.r, Figure A4 Map Legend — Model Boundary Steady State Model • L.G. Everist Monitoring Well I Property Boundary Predevelopment Water Table 0 City of Thornton Monitoring Well '%- Water Table Elevation Contour Contour Interval = 10 ft O NCCI Monitoring Well (from MWE steady state model) NCCI Pit 0 Elevation at Stream (approximate) Water Table Elevation Contour A DWR Constructed Well Contour Interval = 20 ft Weld County, Colorado with Static Water Level (digitized from Robson,2000; dashed where inferred by Robson) Sources: Date:November 17,2020 I� CDSS Well Permit Database 06.07.2020,j&T Consulting Datum/Projection:NAD83/Colorado State i� 1.161J i� • r U MW/Pit Location Drawings,NHD(photorevised),Robson Plane North,feet (2000)Plate 3,ESRI World Topo Map Page A-8 of A-15 :: \.. \,_\\,\___.. 67W 66W 0 4823 9_E r: _ I 0.5 ,s7 ♦i ,., o "1 0' 4:i" 4.,,'_;\• '., •,, , r,..i'. ',\\ 11 S n s^. 4860 4822 4827 1 , \j / ' I ♦ 4829 4818+� 1 N ` !1 y ♦ \ ♦ 14807 0 4862 481A' 4814 r 4808 4803 /�\' troll 4808 4807 A , 48217 ✓ 4809 482,7 A 4826 4825 48.4 i4; -x 4821 f` =36 4821 ,ii 1' ,a111<ase � ♦ l,_ N o 4833 o co o o - - 4833 4864 - \ . 4821 i )14823 1Y lI, 4840 I, NI 48484845r 991 4844 4861♦ 4848 4833 4828 4815 4872 £78's4 4833 ♦4841A♦4870 4842 -4849 4844 48481 4960 \ 1 ♦ ,) 4970 - 4835� 4♦///836 4840 ‹p Q. Kdw 7 i\2 4838 4827 3,C :4849,r♦ 7A 4831 '� cp art..,, A 4835 R. co2 7/ / A486 ! . �� ♦ V *- 4853 O 4875 4834 A 4839;4840 G 4855 . _ \ 4859 4860 a) A -- • 4a1 O a rat, 4848 �4833 • N I A 4856 L.4857 4878 - 4852 W - 4864 —� H ./845 4830 Qua.," 4907 ® 1 ii 1 A' 4864 4844 _3= / ♦4847 . 4848 4876 ♦ 4847 A * i �" 4848: t,,,,,,,,,AA! ♦ s. : \evoi tree 4872 4865 4833 4849 4902 _.) , A A A\,) A884 48fi8 /=65 �841 4858 � .4853 - �0 �� ♦ 1► v i. e eet 4920 / 0 r "1 rt 5, 00 Figure A5 - Bedrock Elevation Map Legend Q NCCI Pit Study Area '"— Top of Bedrock Elevation Contour(ft) 0 Property Boundary Contour Interval = 10 ft (from SPDSS dataset galb1106) 0 NCCI Pit NCCI Pit A DWR Constructed Well Weld County, Colorado with Top of Bedrock Data* *Only those wells with bedrock listed in geologic log are displayed. SourCDSS : Date:November 23, AD8 1 1 ,A�a e; CDSS Well Permit Database 06.07.2020,J&T Consulting Datum/Projection:NAD83/Colorado State020 - Y MW/Pit Location Drawings,NHD(photorevised),SPDSS Plane North,feet Engineering,LLC (2006),Soister Geologic Map(1965),ESRI World Topo Page A-9 of A-15 67W 66W s - 19 W-.&�E ` -- ill Alib t: 1 ao 0 = , _3 • 30 V 3: 41 38 2 031 •- . - _ \ J.,. 32 Av__ __,2 -_, <4 A 18 38 yet A � r o . . 9.,, 6-) ' 28 'A '4. IA . , . 1' 19 z 23 A •,26 23 20 A ', 0 A 2 )o _ y `- 1 . ci 20 A4 A36 N 50 0 6 I o Ln 1 3' 33 --- r ��r 21 �� 35 30 A35 tio 40 0 20 .0 25 14 - p • 20 33 '' 0 0 0 7 .35 �04 30 - 38 • h yhyf A ��as t 33 9'' \ 23 33 w Feet ti 0 ` 2,500 5,000 Figure A6 Map Legend Aquifer Saturated Thickness NCCI Pit Study Area Saturated Thickness(feet) El < 10' El 20'to 30' CI 40'to 48' Property Boundary El 10'to 20' n 30'to 40' A DWR Constructed Well ti Saturated Thickness Contour with Saturated NCCI Pit Thickness(ft)* Contour Interval = 5 ft Note:Contours created by subtracting SPDSS Weld County, Colorado *Only those wells with bedrock and (2013) bedrock elevation from MWE steady static water level data are displayed. state pre-development water table. Sources: Datumovembt • C ra n e Water CDSS Well Permit Database 06.07.2020,J&T Consulting Datum/Projection:n:NADSAD83/Colorado State MW/Pit Location Drawings,NHD(photorevised),SPDSS Plane North,feet Engineering, LLC gals raster dataset(2006),ESRI World Topo Mapli Page A-10 of A-15 67W I 66W N ,f W &1— E 1 S e Elq uN ,...:. 1(s) - cF— . - - . - r - - e 0 .61, _i 4 O' E.,.. 05 d 1,, z 'a i I I N t ,, fD H ,........,.. rag lir,•J ,5J sD . „ - S...) r ;la. 3r j - . c.) 1 I ......)Cl\- Y :r.: . d. M J f�.s. ii ‘`ctNe Dry Creek j { Feet Ali 0 2,500 5,000 Figure A7 Map Legend Transient Model Transient Model 0 Hydraulic Conducitivity Property Boundary Hydraulic Conductivity(ft/day) Adjacent Pit 1 200 50 350 NCCI Pit MI No Flow Weld County, Colorado CDSSSourcesW: Date:Novemberin:17, AD8 020 t McGrane Water Well Permit Database 06.07.2020,J&T consulting Datum/Projection:NAD83/Colorado State MW/Pit Location Drawings,NHD(photorevised),MWE Plane North,feet Engineering, LLC Transient Model K Output,ESRI World Topo Map Page A-11 of A-15 Table Al - CDWR Wells (Page 1 of 4) I I m V m 2 2 2 2 22n 22E 2 '1 22 2^2 Q 2 22G 22 E n 2 22 2 2 2 Q m2E I "222 Q o,o v,°m olm m 2 I7, m Im r' rvlm 4, rvig n - o'm^Q Q814 o 18 8I4 o nlm o Iry 2i"2 8 I g �^I o o o 21 m o I87 m!o� o m�m m \ m !m o m oE r,,mC o o o 0 \ 0 0 0 \ m!o!o 71 mN YI V'om5I VNmIV \ NiVV„IVNN1VN NN V�I V • nIn E EIlE EIIE E IEEE E E EId EI!EnE EE E E EEEE,uE E E EE E EIlEn 22E L 1 n nlZn nnnl�nn ndn n n nnn n Il1 nnitannnnnn n nnnnnn , nnn nnnn n nnni1 G 'C .. 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Modeling results are presented in the main report text. This description is for the both steady state and transient versions of the model. MODEL CONSTRUCTION Model construction includes: • The software, • Grid size, • Boundary conditions. and • Aquifer properties Software We used the USGS's MODFLOW modeling program (McDonald and Harbaugh, 1988) which is the industry standard for most groundwater professionals when simulating groundwater flow. We used the Groundwater Vistas (version 7.22) interface to construct model inputs, execute simulations, and display model results. Model Grid The model domain is about two miles wide (east-west) and five miles long, oriented with true- north. The location is along the South Platte River(SPR) and roughly centered on the NCCI gravel pit. The model grid consists of 535 rows and 230 columns using 50-foot square model cells. Boundary Conditions The model was built in part using hydrogeologic data sets described in Appendix A-Hydrogeology. That data guided geologic zones,the bedrock surface and general hydraulic conductivity ranges. The following boundary types refer to standard MODFLOW boundaries discussed below. River Boundaries Streams and rivers in the model are the SPR and Little Dry Creek(LDC).These streams were simulated with MODFLOW's River(RIV) Package. River package boundary cells were assigned to contiguous cells beneath the SPR and LDC. The river stage was initially assigned based on topographic maps and then smoothed and adjusted slightly lower during calibration, which is justified by the limited spatial resolution of the topography. The southernmost up-gradient stage elevation was 4890 ft (msl) and the northern most down gradient elevation was 4830 feet (msl). River conductance is conceptually(McDonald and Harbaugh, 1988)based on the following formula: Page B-1 of B-14 COND=W x L x Ksb/M Where: W=River width(ft); L=River length(ft); and Ksb/M= streambed leakance (day-1)where, Ksb = the vertical hydraulic conductivity of the streambed (ft/day) divided by the stream bottom thickness (ft). The results of a nearby vertical leakance test of the streambed(site SC-07 in CDM-Smith, June 9, 2006, Figure 2) indicated the Ksb in the area is approximately 331 ft/day. However, an aquifer test conducted in 2009 by Leonard Rice Engineers, at a location nearby(in Twn. 2N., Rng. 66W., Sec. 18) arrived at a Ksb value of 37 ft/day(Miller, 2009). For this model, we used 20 ft/day. MODFLOW input uses only the combined COND value, so the W, L and Ksb/m components do not necessarily correspond precisely to physical field values. For the SPR, we conceptually assumed that Ksb/m = 20 day-1 such as a Ksb = 20 ft/day and M = 1 ft, but this could be other combinations of Ksb/M (e.g., 60/3, 37/1.85, 2/0.1, etc.). The SPR length per cell averages 43.5 feet, accounting for actual river channel path length across the 50 ft cells, depending on path across cells). The river width is assumed to average 100 feet. Again, note that MODFLOW uses only the COND value, so the width should not be taken as a specific physical width value, just a representative range that functions in combination with Ksb/M. For example, if the river width is actually 20% smaller, Ksb/m could be 20%higher and the result in the model is identical. We use a COND value equal to 87,000 ft2/day(43.5 ft * 100 ft * 20 day-1). This value represents a strong hydraulic connection between the SPR and the alluvial aquifer. We used two different COND values along LDC that represent different stream conditions. The upper stretch extends from the west side of the model until the LGE pit located in the center of Section 36, Twn 2N., Rng. 67 W. The lower stretch extends from that point to the north end of the model. We used a uniform COND value of 25 ft2/day in the steady state model but we needed to increase COND in the transient model to allow greater seasonal leakage to better match water table fluctuations in monitoring wells and pit dewatering rates. The resulting COND for the lower stretch averages 800 ft2/day. Table B1 shows several reasonable combinations of conceptual parameters used to calculate the two COND values. For example,for the lower stretch we derived a COND of 800 ft2/day for a river cell 50 ft long using a creek width of 6 to 20 ft, a Ksb ranging from 0.8 to 5.3 ft/day, with a streambed thickness of 1 to 3 ft. For the upper stretch, we derived a COND of 25 ft2/day for a river cell 50 ft long using a creek width of 3 to 10 ft, a Ksb ranging from 0.03 to 0.17 ft/day, with a streambed thickness of 1 to 1.5 ft. The larger width of the lower creek segment may be associated with additional inflow from pit dewatering or the flattened gradient. The lower Ksb range for the upper natural channel may be associated with additional fine grained sediment in the streambed. Either or both are possible,but beyond the scope of this study to substantiate. Page B-2 of B-14 Canal Boundaries The seasonal effects of aquifer recharge from seasonal canal leakage are known, observed, and measurable. They were considered in our analysis of drain mitigation by creating a transient version of the groundwater model. Note: We did not consider such seasonal effects when evaluating the individual impacts of various pit groups in the steady state model, for the same reason we do not consider the seasonal effects of stream recharge and evapotranspiration. We disregard the seasonal changes for simplicity and assume our steady state predevelopment model used in the pit-group simulations represents "average" groundwater conditions. Bedrock Boundaries The bottom of the alluvial aquifer is defined by the structural top of bedrock. The bottom of the model is created by importing the raster version of the SPDSS (CDM-Smith, 2013) top of bedrock map (Figure A5—Appendix A) which also include bedrock elevations from geologic logs available from the State's well database. Next, after importing the ground surface topography map, we compared the surfaces and made inactive any model cells where there was no alluvium or where it was very thin(i.e., bedrock at or near ground surface)or where mapped bedrock was clearly higher than the mapped water table elevations nearby, such as the southwest corner of the model. Lined and Unlined Pits Figure 4 in the report text shows the lined pits simulated in the model. Lined pits are modeled using inactive cells. Pit boundaries were digitizing based on information provided by J&T Consulting (personal communications, June-July, 2020) including "Reclamation Reports" filed with the Colorado Department of Mine Safety (DRMS) and email communication with LG- Everist, Co. The pit boundary maps were imported into the GWV program and lined pits were simulated by assigning those cells as inactive. Two unlined pits were identified to us after our models were already in development. So we tested their impacts in a separate sensitivity simulation by assigning an extremely high hydraulic conductivity(K) values (a measure of permeability) which simulates an open water surface. We found these pits were not close enough to significantly affect the results and therefore we left them as unconstructed pits in this modeling evaluation, meaning they were not lined but also not open water. Model Inflows and Outflow We used General-Head Boundaries (GHB) on the north, west, and south edges of the model in locations where there was no specific hydrogeologic boundary. That is a common use of the GHB boundary type. Heads for the GHBs were assigned based primarily on the predevelopment water table map, river elevations, well data and published maps (See Appendix A). Page B-3 of B-14 When planning the model grid,we used a north-south line as the model"no-flow"boundary. This allowed a strong SPR river boundary,but no activity between the river and the model edge during simulations. We also used inactive cells in the southwest corner of the model where bedrock is mapped(Figure A3 —Appendix A). Aquifer Properties Aquifer properties were chosen with guidance from values published in the South Platte Decision Support System (SPDSS) groundwater model (CDM-Smith, 2006). The SPDSS used contoured K values increasing from west to east across the alluvial aquifer. In the southern study area,the K of the LDC alluvium progressively increases from 350 ft/day to 550 ft/day beneath the SPR. In the northern study area near the NCCI pit,the K of the SPR alluvium increases from approximately 550 ft/day to 600 ft/day toward the SPR. We also created a zoned K distribution during calibration that increased from west to east but used a uniform value of K= 550 ft/day starting just west of the LDC. For the transient model we needed to reduce the uniform K area to 350 ft/day to better match monitoring well heads and match measured pit pumping values. Calibration also led us to lower K to 200 ft/day along the west edge of the alluvium(terrace areas) and to 50 ft/day for the eolian areas to the west of the alluvial aquifer. We confirmed that both models are basically the same at a large scale. Figure A7 in Appendix A shows the K values used in the transient model. For the transient model,we set specific yield(Sy) =0.20 and found that it worked well for the transient calibration. STEADY STATE MODELING A steady state model means that aquifer inflow, outflows, and water levels are steady through the entire simulation, such as no seasonal fluctuations. Steady-state models therefore represent average conditions. Figure B1 (Same as Appendix A — Figure A4) compares our steady state predevelopment water table to that created by the USGS (Robson, 2002) along with the available data from the State's database (DWR, 2020). The measured well elevations were calculated by subtracting the depth to water(from the well completion reports) from elevations obtained from U.S. Geological SurveylOm Digital Elevation Model(DEM) elevation data set. We consider the steady state groundwater model output as representative of pre-development conditions and the descriptors are used interchangeably throughout this report. The steady state pre- development water table was used to: • Calculate the aquifer saturated thickness (Figure A6—Appendix A); • Determine long-term impacts caused by various pit groups (described in report text); and • Used as input into the transient groundwater model (discussed below) to evaluate seasonal conditions and estimate perimeter drain flow. Page B-4 of B-14 Steady State Model Results Comparison Figure B2 compares modeled water levels in cells with wells to reported water levels in the DWR database. For a perfect match, the data would have no scatter and fall along a straight line and have an R2 of 1.0 (100%). However, a perfect match is never expected due to various reasons such as measurement error and annual and seasonal differences between measurements made at different times of year. A typical assessment of the degree of"error" in the model calibration is the root-mean-square(RMS) of the residuals (residual means the difference between modeled and observed water level at each well). A rule-of-thumb goal is for the RMS error to be less than 10% of the range in heads across the observed data. The fit of the data compared to an ideal straight line has an R2 of 94% and the calibration results have a scaled RMS values of 5.5% compared to measured water levels in the DWR database. TRANSIENT MODEL The purpose of constructing a transient groundwater model was to estimate seasonal high flows into the future drain, and residual drawdown after the drain is installed. To gain confidence in these seasonal predictions,we calibrated the model to monthly NCCI pit dewatering records and to observations from two monitoring wells in the vicinity(Z1 and Z2)measured from 2014 to 2020. We chose those two wells since they are farther from the pit, so they are not dominated by pit dewatering, and also near LDC,where they would give us the best indicator of regional seasonal fluctuations. Transient Boundary Conditions and Aquifer Properties Most boundary conditions remained the same for the transient model including the bottom of the alluvial aquifer; the South Platte River,bedrock, lined and unlined pits, and GHB boundaries. Aquifer properties also remained the same with the exception of the alluvium's K, as noted previously. We also reduced K immediately around the NCCI pit when calibrating the dewatering pumping rate. This was done to account for typical pit-face factors. For example,near an excavated pit during dewatering(dewatering down to bedrock),the water table gradient becomes so steep that vertical K becomes a factor in reality,but vertical K is not a parameter in MODFLOW models that have only a single computational layer, as is the case for our model. The vertical K effects can be approximated in our single-layer model with a reduced K immediately around the pit. Also,high-velocity flow at the pit face can result in an effectively lower K for the aquifer. Additionally, when pits are excavated, fine materials are sometimes placed on the pit walls intentionally, and sometimes left there unintentionally. In our experience, all three of these factors lead to a lower effective K around the pit perimeter during dewatering. Boundary condition changes for Little Dry Creek(LDC) and additional boundary conditions are described below. Page B-5 of B-14 Lupton Bottom Ditch Our initial steady-state model represented average aquifer conditions and had well-approximated the regional water table gradients without including irrigation canals. For the drain evaluations, however,NCCI asked us to consider drain flows during seasonally high water level conditions. They had observed these seasonal changes to the west of the pit. So, for the transient model we added the Lupton Bottoms Ditch to the west of the NCCI pit and also an irrigation canal to the northeast of the pit. We modeled both ditches using a specified-flux boundary condition("recharge")to cells under the ditch. In other words,the ditch leakage added recharge to the aquifer under the ditch. A specified-flux condition is a common representation for irrigation canals, and it is an accurate representation when the water table is below the ditch bottom so that the leakage rate is independent of fluctuations in the water table elevation. The leakage rate was set to zero during the winter season and turned on during the irrigation season, from spring to fall. The summer leakage rate was estimate through calibration to be about 1 ft/day in the Lupton Bottom Ditch and 0.6 ft/day in the ditch on the east side of the NCCI pit. NCCI Pit The NCCI pit was first simulated under its existing dewatered condition. This was done by using a thin zone around the perimeter of the pit which had reduced K(explained previously) and using MODFLOW drain cells to remove water from the pit bottom which simulated pit dewatering pumping. We the compared the model-computed inflows to the pit against NCCI's dewatering records. Our primary calibration parameter for matching dewatering records was the K of the pit perimeter. During this calibration we also changed the seasonal stage fluctuations of LDC and leakage from the Lupton Bottoms canal, although those latter two changes were mainly used to calibrate against the Zl and Z2 monitoring well data. NCCI Pumping Based on NCCI records,monthly dewatering pumping is over 5000 gallons per minute (gpm) in the summer and lower during the winter. The winter rates were typically around 3000 gpm from 2014 to 2017,but have declined annually since then to approximately 1000 gpm in 2020. The recent lower rates are likely caused by regional aquifer dewatering developing over time. However, seasonal summer recharge has sustained rates over 5000 gpm, even in recent years. The monthly average rates are shown in Figure B3. Transient Model Calibration Results We constructed the transient model to run with two stress periods per year. (One exception is the first year which has two additional stress period between the start of the run and the first summer stress period.) One stress period represents the summer or irrigation season,during which canals are running and leaking, and LDC stage is elevated. The second period represents the winter and non-irrigation season, with the canals off and the LDC stage lower. We modeled the summer/irrigation season to vary in length each year,based on distinct level changes recorded in monitoring wells Z1 and Z2. We Page B-6 of B-14 assumed those changes in Z1 and Z2 are reasonably good indicators of the start and end of each season since they are adjacent to LDC and fairly close to the Lupton Bottoms Canal. We note that they could also represent seasonal activity in up-stream pit dewatering, if those pits discharge to LDC. Over the 10-year simulation period (2011 to 2020), the irrigation season's average length was 6.5 months, typically starting in late March or early April. We used 12 model time steps per stress period, with each time step length getting progressively longer later in the season. The simulation period was for 10 years, conceptually covering from January 2011 to December 2020, but our results focus on three recent years (2017-2019) as shown in Figure B4. Our transient calibration goals were to approximate observed water levels near the NCCI pit as well as the recorded pumping rates required to dewater the pit. We did this primarily by modifying seasonal leakage (i.e., recharge) from the Lupton Bottom Canal and seasonal variations in stage for LDC. We also adjusted the effective permeability of the NCCI pit walls, but that was mainly to match the simulated pit dewatering rate. During calibration, all the pits and creek conditions are identical each year. The season length changed from year to year, but otherwise the stage and leakage rates and pit conditions were assumed to the same from year to year. This was necessary since we do not have sufficient year-to-year detail about conditions of the pit and nearby pits, or weather, canals, evapotranspiration, etc,to accommodate a higher level of complexity. Figure B4 shows the best-fit (i.e., "calibrated") model pumping rates compared to observed values. The model closely matches the seasonally high pumping rates. The model over-estimates the low dewatering rates in winter,when the Lupton Bottom canal is turned off and LDC is low and reportedly narrow. For drain design purposes, the project team and clients agreed that we should focus on the high flow period(summer), and concluded it would not be cost effective to attempt to better match the low flows observed in winter. Figure B5 shows the close comparison between modeled water levels at the NCCI monitoring wells Z1 and Z2 located west of the southwest corner of the south pit(See Report Figure 2). In recent years, the natural water table fluctuation in the Z1 and Z2 monitoring wells is typically four to six feet whereas the model simulates 8 to 10 feet of fluctuation. This implies that the model may overestimate seasonal water table fluctuations in recent years. However, the simulated range was a good match in at least 2014. We conclude that by designing the drain to handle the higher summer-time levels observed in the modeled period, the model is conservative for designing for peak irrigation season (summer) conditions. As noted above, one of the primary changes made for the transient water level calibration was adding leakage from the Lupton Bottoms Ditch. That leakage started out as zero in the steady-state model, started initially at 0.5 ft/day in the first transient runs, and then we arrived at a final value equal to 1.0 ft/day or lower for calibration to water levels. We also varied the stage in LDC by a total of two feet seasonally, with it one foot higher than the steady-state model in summer and one foot lower than the steady-state model in winter. For simplicity,we did not vary any components of the COND term(i.e., Page B-7 of B-14 width) of LDC seasonally. The effective K of the pit wall was initially set equal to the aquifer by default, and then lower through calibration to K= 15 ft/day. Transient Model Results Comparison To demonstrate that the monthly water levels derived from the transient model are reasonably close to average conditions we averaged and compared them to measured values in Figure B6. This is similar to how we compared the average steady state water levels to the same measured values in Figure B2. The fit of the data compared to an ideal straight line has an R2 of 93% and the scaled RMS compared to measured water levels in the DWR database of 6.2% which is approximately 1 percent higher than the steady state calibration results. This demonstrates that both models are well calibrated to observed water levels and the models are essentially the same. TRANSIENT MODEL RESULTS The transient model results are discussed in the main report text. MASS BALANCES MODFLOW uses iterative numerical methods to find a head solution to the large system of flow equations. In other words, the method approximately identifies a water level in each cell that is "accurate,"meaning it is consistent with water levels in all adjacent cells and flows between those cells and all other cells. These numerical methods are approximate, and one way to assess the adequacy or accuracy of the final head solution is to look at the scale of differences ("errors") between the computed total flows into and out of the modeled system. Table B2 provides the inflow and outflow mass balances for the steady-state model. Table B3 provides this for the transient model. For the transient model, these are the average rates over the 10 year simulation. A rule-of-thumb standard when using MODFLOW is to have the total mass balance error less than 1%. It is less than 0.006% for both of our models, which is good. For the transient model, the largest mass balance error for any of the 253 time steps was 0.16% and the average error of individual time step errors was 0.05%. We conclude that the model mass balance error is acceptable for this project. REFERENCES References are included in the main body of the report. 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Co to creak Z 0 0 - - _ ' G Caursa ," er 0 1i: Feet 111 0 3,000 ghw 6,000 I -Hitinineay�2- 30hway52- _— G,,,r i .•,tr.r, Figure B1 Map Legend — Model Boundary Steady State Model • L.G. Everist Monitoring Well I Property Boundary Predevelopment Water Table 0 City of Thornton Monitoring Well '%- Water Table Elevation Contour Contour Interval = 10 ft O NCCI Monitoring Well (from MWE steady state model) NCCI Pit 0 Elevation at Stream (approximate) - Water Table Elevation Contour A DWR Constructed Well Contour Interval = 20 ft Weld County, Colorado with Static Water Level (digitized from Robson,2000; dashed where inferred by Robson) Sources: Date:November 17,2020L I� CDSS Well Permit Database 06.07.2020,j&T Consulting Datum/Projection:NAD83/Colorado State i�� i� IIL r U MW/Pit Location Drawings,NHD(photorevised),Robson Plane North,feet (2000)Plate 3,ESRI World Topo Map Page B-10 of B-14 Figure B2. Steady State Model Calibration Plot: Modeled vs. Observed water levels. 4930 4920 . •,. • 4910 - - • - 4900 • vi .J 4890 I ♦ 4880 �• 4 $ • y 0 ♦ s's ai 4870 •°, • •>7 •• —Theoretical Slope of 1 v 4860 1 • »♦ • - g •�,• • steady-state model 4850 O •. •'• O O —Linear(steady-state model) v 1:5 • 4840 ��•� y=0.9406x+288.91 2 4830 -- R2=0.9382 4820 4820 4830 4840 4850 4860 4870 4880 4890 4900 4910 4920 4930 Observed Water Level(feet MSL) Figure B3—NCCI Pit Monthly(average) Pumping Rates Monthly(average) Pumping Rate 9000 8500 8000 - _ - 7500 - 7000 .. 6500 - I. 6000 n 5500 I IIIA an5000 4500V f ainl 1 itiL . 3500 I 8 3000 , VAMINE'1 - - 12 2500 i J I I i 2009 1500 500 I - . � I I 0 Jan-2014 Jan-2015 Jan-2016 Jan-2017 Jan-2018 Jan-20I9 Jan-2020 Page B-11 of B-14 Figure B4—Transient Model Pumping Rate Comparison 9000 - — 8500 -o-Pit Dewatering-Data(monthly avg) 8000 7500 — —model(T7dw) 7000 - 6500 a 6000 II a m / 1 a V Y 5500 ? 1 ro t J 1 Q I I 9 'a 4500 ' 1 S %I 1 I I c I e 1 171---, 1 m 4000 1 ) ` + a v. P 3500 1 4\ I V % - 1 I w 11 Q I , 1 L 1 3 3000 4 t I 3 1 . t, 1 0 2500 d � ; `0 J 1 a 2000 _ _. �4 I _e 1 ` 1 a `d ; 1 1500 • - - 1 D 1000 V 500 0 Jan-2017 Jan-2018 Jan-2019 Jan-2020 Jan-2021 Figure B5—Seasonal Water Level Comparison at Monitoring Wells Z1 and Z2 4880 J 4878 • M W-Z1 data 4876 — -- - 4874 MW-Z1 model(T7dw) 4872 - ' • MW-Z2 data 4870 --- - -- - —MW-Z2 model(T7dw) 4868 -- — --,--- — vl 4866 !.., - -- - - 2 4864 r0. f• — If\ �a�i 4862 +. • !:� s r 4860 ; t • 1. > 4858 U `, // y 4856 \ ' 3 4854 4852 4850 4848 4846 4844 4842 4840 Jan. Jan Jan, 7an.1024 Tan-7015 Jan. 2016 Jan. ?01.7d n Z018 7dn 1019 7dn 2p1 p Jan_2021 Page B-12 of B-14 Fi.ure B6. Transient Model Calibration Plot: Modeled vs. Observed water levels. 4930 4920 — • N 4910 ♦ — ,4900 • I 0 v 0 4890 CQ 00♦�♦•4 a� 4880 !�- ♦ I— aai 01 • f.♦>� -i 4870 ��♦♦ !w:� ci to 0�♦ —Theoretical Slope of 1 w A 4860 �♦�j♦��6♦��♦ O transient model ♦... 4850 S f•�0 Linear(transient model) N 4840 - y=0.9579x+206.05 2 4830 I — RZ=0.9262 4820 — — 4820 4830 4840 4850 4860 4870 4880 4890 4900 4910 4920 4930 Observed Water Level (feet MSL) Page B-13 of B-14 Appendix B - Tables Table B1 - Range of Conceptual Parameters Use to Calculate COND in Little Dry Creek Lower Little Dry Creek(constructed through gravel pits) Length(ft) Width(ft) Ksb(ft/day) M(ft) COND(ft^2/day) 50 6 5.33 2 800 50 10 4.80 3 800 50 20 0.80 1 800 Upper Little Dry Creek(natural reach) 50 3 0.17 1 25 50 5 0.15 1.5 25 50 10 0.03 0.5 25 Table B2—Steady State Mass Balance Parameter Inflow(cfs) Outflow(cfs) RIV cells: 3.96 13.25 GHB cells: 11.82 2.53 Total: 15.78 15.78 Difference in Totals: -0.00000012% Table B3 —Cumulative Transient Mass Balance Parameter Inflow(cfs) Outflow(cfs) RIV cells: 2.65 16.65 GHB cells: 9.00 2.98 Storage Change: 3.96 3.86 Recharge: 7.88 0 Total: 23.49 23.49 Difference in Totals: 0.006% Page B-14 of B-14 Pi" McGrane Water Engineering APPENDIX C — MONITORING WELL DATA AND PLOTS BACKGROUND The following monitoring well daaa was provided by J&T Consulting, LLC. MWE organized the data by well owner in the following order: • NCCI Pit Wells • Thornton"Z"Wells • LG-Everist Wells • Rankin Wells The data is first presented in a composite plot for all wells followed by the tabulated measured values. Source notes are included after the data tables. McGrane Water Engineering, LLC Page C-1 of C-20 1669 Apple Valley Rd. • Lyons,CO 80540• Phone: (303) 917-1247 E-Mail:dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Appendix C - NCCI Pit Monitoring Well Data and Plots d)l r °, c'�l cc a l O��o Si, I'Ocl , S eor o l0 cl al °r } oc-' (-o 9 �l0• l (--' c °l v, ,-- 0cl no la 9 liired. 1. .1 , ob 02. Is 46 I o c o .= 0 0l a, 0 l0� 0 a eo o v eo Z . 800� I' o ,� o ter-, obi t Or 9 °l �: °O� 9 S ��0 I. t O � _ • r ap /°l o Cri eo (0 l 1 u, o o o v, o u, o O T LO u, o0 m a a a v . a a a v aco i°l (Ise 4)aaieMpuno.r9 to uoilenal3 McGrane Water Engineering, LLC Page C 2 of C-20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com NCC Pit#1 Monitoring Wells(1 of 7) Well:1 1 2 3 4 5 • 6 7 ':. 8 • Elevation^14869.96':1 -- 4868.08 -- 4867.33 -- 4869.571 -- ':1 4868.35 -- 4871.68 -- 1 4867.381 -- ':1 4867.05` -- Date 1 Depth to GW Depth to GW Depth to GW Depth to I GW ',,Depth to GW 1 Depth to GW I Depth to I GW ',,Depth to i GW Sampled 1 GW Elevation GW Elevation GW Elevation GW I Elevation',, GW Elevation i GW Elevation I GW I Elevation', GW E Elevation 10/24/2003: 2.4 4867.5 4.0 ' 4864.1 3.3 4864.0 6.0 1 4863.E 3.0 14864.4 2.7 1 4864.4 11/24/20031 2.3 4867.6 4.0 ' 4864.1 3.3 4864.0 6.1 14863.5 3.0 14864.4 2.7 I 4864.4 12/26/20031 2.4 4867.5 3.9 4864.2 3.3 4864.0 6.0 1 4863.E 1 allii 3.1 1 4864.3 2.6 1 4864.5 1/16/20041 2.4 4867.5 3.9 ' 4864.2 Mil 4864.0 6.0 1 4-8-6-3-.6-1IIIIIIIMIIIIIIIIIIIMII 2.9 1 4864.5 ', 2.6 1 4864.5 2/14/20041 2.3 1 4867.7 4.0 4864.1 3.3 4864.0 6.0 1 4863.E 1 Mill 2.9 l 4864.5 12.6 1 4864.5 3/16/20041 2.3 4867.6 4.0 4864.1 2.9 4864.4 4.2 1 4865.4 2.6 r 4864.8 1 2.1 1 4865.0 4/20/20041 2.1 1 4867.9 4864 6 3.1 4864 2 4 2 4865 4 2.5 4864 9 1.9 4865.1 5/15/2004 2.0 4868.0 4864.7 3.1 4864.2 4.0 4865.E 2.1 !4865.3 1.7 1 4865.4 6/7/20041 6.4 I 4863.5 3.7 4864.4 4.4 4862.9 1.6 1 4868.0 I 2.0 4866.4 3.0 4868.7 3.3 1 4864.0 I i 4867.1 7/14/20041 5.2 4864.8 3.6 4864.5 4.3 4863.0 1.7 r 48679 1 1.7 4866.7 3.2 4868.5 3.4 1 4864.0 1 1 4867.1 8/20/20041 5.0 1 4865.0 3.3 4864.7 5.2 4862.2 1.7 1 4867.9 1 1.7 4866.7 3.2 4868.5 3.6 1 4863.8 1 1 4867.1 9/13/20041 5.8 1 4864.1 5.0 4863 1 5.1 4862.2 2.1 ..r 4867.5 2.1 ' 4866.3 3.3 4868.3 3.6 1 4863.8 4867.1 10/19/20041 5.8 4864.1 5.0 4863.1 4.9 4862.4 2.5 1 48671 2.7 4865.7 3.8 4867.9 4.3 1 4863.0 4867.1 12/15/20041 7.5 ',, 4862.5 6.0 4861.3 68 148627 7.3 4861.1 8.3 I 4858.7 • 12/22/20041 7.0 !. 4863.0 ......... 4 5 4862 8 6.6 14863.0 6 7 4861.7 1::::::::: 7.9 1 4859.1 1/21/20051 6.1 1 4863.9 4.0 4864.1 5.9 4861.4 2.8 4866.7 1 7.4 4860.9 1 IMI 1 2.0 1 4865.1 2/15/20051 6.7 4863.3 4.9 4863.2 6.0 4861.3 5.0 1 4864.6 1 5.5 4862.9 1 6.0 1 4861.1 3/21/20051 6.3 1 4863.7 5.4 4862.7 5.8 4861.5 5.4 1 48642 1 4.8 4863.5 6.3 i 4860.8 4/8/20051 7.6 1 4862.4 5.2 4862.9 5.0 4862.3 4.6 1 4865.0 1 3.1 4865.3 3.3 4868.3 111.11111111, 4.9 1 4862.1 5/27/20051 7.0 1 4863.0 4.9 4863.2 5.2 4862.2 4.3 r 4865.2 1 3.8 4864.5 1 4.2 4867.5 1 5.0 1 4862.1 6/11/20051 7.4 4862.5 5 1 4863 0 4 0 4863 3 4.1 1 4865.5 1 3 9 4864.4 4 4.3 4867 3 1 4.5 1 4862.6 7/6/2005 i 7.7 1 4862.3 3.5 4864 6 4.2 4863.2 4.1 1 4865.5 1 3.3 4865.0 l 2.7 4869 0 1 4.6 1 4862.5 8/9/20051 9.4 4860 5 4.0 4864 1 4.3 4863 0 4.4 1 4865.2 4864 9 [ 3.5 4868.2 5.1 1 4862.0 9/15/20051 9.2 1 4860.8 4.3 4863 7 4.1 4863 2 4.5 1 4865.1 4.9 1 4862.1 • • • • • 11/15/20051 9.0 4861.0 4861.5 5.6 4862.8 j 11/22/20051 9.2 4860.8 5.8 4861.5 • 5.6 4862.8 11/29/20051 9.1 4860.9 5.9 4861.4 1• 57 4862.7 12/9/20051 9.0 1 4861.0 5.9 4861.4 5.7 4862.7 • 12/15/20051 9.1 1 4860.9 6.0 4861.3 1 1 5.8 4862.E 12/20/20051 9.0 1 4861.0 6.1 4861 2 5 8 4862.5 E 12/28/20051 9.2 4860.8 6.2 4861 2 • 5.9 4862.4 , • 1/4/20061 8.9 1 4861.0 ... 6.2 4861.2 1 5 9 4862.4......E 1/10/20061 9.1 1 4860.9 6.2 4861.2 1 61 4862.3 1/20/20061 9.04861.0 6.1 4861.2 5.9 4862.4 E 1/28/20061 9.0 1 4861.0 6.2 4861.2 • • 5.9 4862.4 [ 2/1/20061 9.1 4860.9 6.3 4861.1 6.1 4862.3 I 2/6/20061 9.0 1 4861.0 6.3 4861.1 6.1 4862.3 2/14/20061 8.8 1 4861.1 6.4 4860.9 1 6.3 4862.0 • 2/23/20061 8.9 4861.0 Mill NM 6.5 4860.8 4.2 4864.2 3/2/20061 9.1 4860.9 6.3 4861.1 6.0 4862.4 3/8/20061 9.0 1 4861.0 6.3 4861.1 6.1 4862.3 3/14/2006 8.9 1 4861.0,..... = • 4861.0 1..... 6.2 4862.2 1 I 3/23/20061 9.2 4860.8 IIMI 4860 8 6.4 :. 3/27/20061 9.1 1 4860.9 7.5 4859.8 6.7 4861.7 4/4/20061 8.8 1 4861.2 8.4 4858.9 1 7.1 4861.3 • 4/10/2006 8.8 4861.1 8.3 4859 0 6 8 4861.5 • 4/19/20061 8.5 48588 6.8 4861.6 ! 4/24/20061 8.6 4858.71 7.2 4861.2 1 5/4/20061 8.7 4858.7 1 7.3 4861.0 5/10/20061 Ell= 8 6 4858 7 7 2 4861.2 Mal 5/15/20061 7.8 4859 6 7.0 4861.4 5/22/20061 9.24858.2 7.3 4861.1 , 5/30/20061 9.1 4858.2 7.4 4860.9 [ • 6/6/20061 EMI 7.5 4859.8 6.8 4861.5 6/15/20061 7.6 4859.7 1 6.9 4861.4 MEM= 6/21/20061 7.4 4859.9 1 6.7 4861.7 i • !, 6/27/20061 ( 8.3 4859.0 • 7.3 4861.0 7/5/20061 8.4 4858.9 7.3 4861.0 • 7/12/20061 1 6.8 4860.5 6.8 4861.5 E 6.2 1 4861.2 ',1 7/18/20061 7.3 4860.0 '!, 7.0 4861.4 E 6.2 : 4861.2 '!, 7/26/20061 7.5 4859.8 7.3 4861.0 6.2 1 4861.2 • 8/2/2006 ... 7.5 4859.8 ......... 7.3 4861.1 6.2 1 4861.2 8/8/20061 7.9 4859.4 1 1 7.3 4861.1 E 6.2 1 4861.2 8/15/20061 1 7.8 4859.E 7.1 4861.3 6.0 1 4861.4 . McGrane Water Engineering, LLC Page C-3 of C-20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com NCC Pit#1 Monitoring Wells(2 of 7) Well:1 1 2 3 4 5 6i 7 8 Date 1 Depth to GW Depth to GW Depth to I GW Depth to i GW Depth to GW I Depth to I GW i Depth to I GW Depth to I GW Sampled 1 GW Elevation GW Elevation GW 1 Elevation GW 1 Elevation GW Elevation 1 GW 1 Elevation 1 GW 'Elevation GW 1 Elevation 8/23/20061 Ell 7.8 I 4859.E 7.2 4861.2 6.2 1 4861.2 8/28/20061 7.5 1 4859.8 7.2 4861.2 1 _ 6.0 I 4861.4 9/6/20061 7.8 1 4859.5 7.2 4861.2 • 6.1 I 4861.3 9/11/20061 8.3 1 4859.0 7.3 4861.1 1 6.0 1 4861.4 Ell 9/18/20061 8.3 1 4859.1 7.3 4861.1 6.0 l 4861.4 9/28/20061 9.2 4860.8 8.4 l 4858.9 8.1 4860.3 6.0 1 4861.4 10/4/20061 9.2 4860.8 • 8.3 1 4859.1 ' 8.3 4860.1 1 6.0 I 4861.4 10/12/20061 9.3 4860.E 8.3 1 4859.1 8.3 4860.1 1 l 6.0 1 4861.4 10/18/20061 9.3 4860.7 8.5 I 4858.8 1 8.3 4860.0 6.0 I 4861.4 10/25/20061 9.4 4860.5 8.7 1 4858.7 l 8.3 4860.0 1 i 6.0 1 4861.4 11/6/20061 9.3 4860.6 8.5 1 4858.8 8.2 1 4861.4 8.1 4860.3 • 11/14/20061 9.4 4860.5 8.5 1 4858.8 8.0 1 4861.6 8.2 4860.2 11/24/20061 9.3 4860.6 8.6 1 4858.7 8.0 1 4861.6 8.3 4860.1 11/28/20061 9.3 4860.7 8.4 1 4858.9 8.1 I 4861.5 8.2 4860.2 12/5/20061 102 4859.8 8.5 1 4858.8 8.0 I 4861.E 8.2 4860.2 12/11/20061 11.3 4858.6 8.6 1 4858.7 8.0 14861.6 8.1 4860.3 12/19/20061 11.5 4858.5 86 4858.7 8.0 4861.E 4860.2 [ 12/28/20061 11.6 4858.4 MI 8.5 I 4858.8 : 7.9 I 4861.7 4860.1 1/5/20071 11.4 4858.5 8.6 1 48587 80 1 48616.. 48602 ,.,,,,,,, 1/10/20071 11.5 48585 8.7 I 4858.7 8.2 I 4861.4 4860.3 1/16/20071 11.E 4858.4 11.1111 86 1 4858.7 81 1 48615 8.2 4860.2 • 1/23/20071 11.4 4858.5 al 8.7 1 4858.7 8.1 1 4861.5 8.3 4860.1 1/31/20071 15.2 4854.8 11.4 4856.7 13.4 1 4853.9 15.1 I 4854.5 16.2 4852.2 2/7/20071 15.3 4854.6 11.6 4856.5 13.6 1 4853.7 15.1 I 4854.5 16.2 4852.2 1 2/12/20071 15.3 4854.6 11.5 4856.6 13.7 I 4853.7 15.3 1 4854.2 16.3 4852.1 2/20/20071 15.3 4854.7 11.3 4856.7 13.4 1 4853.9 15.3 I 4854.2 16.2 4852.2 I 2/27/20071 15.1 4854.9 10.9 1 4857 2 12.7 I 4854.7 15.0 . 4854.6 15 9 4852.4 I 3/6/20071 14.8 4855.1 11.0 I 4857.1 13.0 1 4854.3 15.0 1 4854.6 16.5 4851.9 3/13/20071 14.8 4855.2 11.2 1 4856.9 13.3 I 4854.1 15.1 i 4854.5 16-7 4851.7 l [ 3/24/20071 14.7 4855.3 11.3 4856.8 13.3 1 4854.0 15.0 1 4854.6 16.7 4851.7 4/4/20071 14.6 4855.4 11.1 4857.0 13.3 1 4854.1 15.7 I 4853.9 16.6 4851.8 l 4/10/20071 14.5 4855.5 10.8 4857.2 13.2 1 4854.2 16.3 1 4853.2 16.5 4851.9 4/17/20071 14.5 4855.5 11.3 ' 4856.8 13.7 1 4853.7 16.5 = 4853.1 16.0 4852.4 i 4/25/20071 14.4 4855.5 10.4 4857.7 12.7 1 4854.7 15.4 ` 4854.2 15.5 4852.9 i 5/1/2007 14.3 4855.6 9.4 : 48587 11.3 4856.1 14.7 ` 4854.9 15.4 4852.9 [ 5/10/20071 13.8 4856.2 9.2 4858.9 11.8 1 4855.6 15.8 I 4853.8 : 14.5 4853.9 5/16/20071 13.6 4856.4 9.0 4859.1 11.7 1 4855.7 15.8 I 48537 142 4854.2 I : 5/23/20071 13.3 4856.6 9.2 4858.9 11.9 1 4855.4 16.0 1 4853.6 13.8 4854.6 5/31/20071 13.2 4856.8 9.6 4858.5 12.3 1 4855.1 16.2 1 4853.4 13.0 4855.4 6/6/20071 13.2 4856.8 10.0 4858.1 12.7 1 4854.7 16.3 1 4853.3 12.7 4855.7 1 6/15/20071 13.2 4856.8 10.3 4857.7 13.0 1 4854.3 16.6 I 4853.0 13.8 4854.6 1 6/20/20071 13.3 4856.7 10.5 4857.6 13.6 1 4853.7 17.9 1 4851.7 13.5 4854.9 1 6/28/20071 13.3 4856.7 10.5 4857.E 13.5 1 4853.8 18.3 I 4851.2 13.3 4855.0 1 7/5/20071 13.3 4856.6 10.8 4857.2 13.7 1 4853.7 18.5 I 4851.1 • 13.4 4854.9 1 • 7/10/20071 13.4 4856.5 11.3 4856.8 14.0 1 4853.3 18.8 : 4850.8 13.5 4854.9 7/18/20071 13.5 4856.5 11.3 4856.7 14.1 1 4853.2 18.6 i 4851.0 12.1 4856.3 7/25/20071 13.3 4856.6 11.2 4856.9 14.0 1 4853.3 18.8 I 4850.8 11.9 4856.4 8/1/20071 13.3 4856.6 10.8 4857.2 13.8 1 4853.5 18.8 I 4850.7 10.8 4857.5 1 8/8/20071 13.4 4856.5 10.5 4857.6 13.7 1 4853.7 19.2 1 4850.4 10.5 8/14/20071 13.3 4856.7 11.0 4857.1 14.1 I 485.3.2 19.6 I 4850.0 9/21/20071 13.3 4856.E allia 4856.2 14.4 1 4852.9 203 1 4849.3 12.3 4856.0 9/28/20071 13.5 4856.5 12.5 1 4855.6 15.1 1 4852.2 21.5 I 4848.1 13.4 4854.9 10/5/20071 13.7 4856.3 12.7 1 4855.4 15.8 1 4851.E 22.2 [ 4847.4 13.7 4854.7 10/10/20071 13.8 4856.2 12.5 1 4855.6 15.0 1 4852.3 22.3 14847.3 13.8 4854.6 1 10/19/20071 14.0 4856.0 12.0 '.. 4856.1 14.6 1 4852.7 22.3 4847.2 14.1 4854.3 • 10/27/20071 14.0 4856.0 12.3 l 4855.7 15.4 1 4851.9 22.8 14846.7 14.3 4854.1 1 1 1 10/31/20071 14.1 4855.9 12.9 l 4855.2 16.3 1 4851.1 24.3 ........4845.3 14.8 4853.5 .......................................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................................................................... 11/5/20071 14.2 4855.8 13.1 4855.0 16.6 1 4850.7 24.4 E 4845.2 15.1 4853.3 12/5/20071 14.4 4855.5 13.E l 4854.5 17.8 1 4849.E 25.7 E 4843.9 15.9 4852.4 i .................................................................................:........................................................................................................................................................................................................................E................................................................................................................................................1........................................................................1............................................................................................................... 12/11/20071 14.4 4855.5 13.7 l 4854.4 18.2 1 4849.2 25.7 _ 4843.9 16.1 4852.3 • 12/19/20071 14.6 4855.4 13.9 4854 2 18.3 1 4849.1 25.8 - 4843.8 16 3 4852.1 12/27/20071 14.E 4855.4 14.2 4853.9 18.3 1 4849.0 25.8 1 4843.8 16.3 4852.0 1/7/20081 14.7 4855.3 14.4 4853 7 18.4 I 4848.9 25.8 14843.7 16.5 4851.9 - 1• ... ....,..... 1/14/20081 14.8 4855.2 14.6 4853.5 18.8 1 4848.6 26.3 r 4843.3 16.7 4851.7 i 1/22/20081 14.8 4855.1 14.E 4853.5 18.8 j 4848.5 26.3 I 4843.3 16.8 4851.E i 1 ` 1 1/28/20081 14.9 4855.0 14.7 4853.4 19.0 1 4848.3 26.3 1 4843.2 16.8 4851.5 1 l McGrane Water Engineering, LLC Page C 4 of C 20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com NCC Pit#1 Monitoring Wells(3 of 7) Well: 1 2 3 111111111111111111111111111111101111111116 7 8 Date Depth to GW Depth to GW Depth to GW Depth to GW ;Depth to GW Depth to GW Depth to GW Depth to GW Sampled GW Elevation; GW Elevation GW Elevation GW Elevation i GW Elevation GW Elevation GW Elevation GW Elevation 2/5/2008 15.0 4855.0 s 14.7 4853.4 19.2 4848.2 26.3 4843.3 16.9 4851.4 MINIIMOMMIMMIMIN 2/13/2008 15.0 4855.0 I 14.8 4853.3 19.1 4848.2 26.3 4843.2 17.0 4851.4 2/18/2008 15.0 4855.0 14.8 4853.2 19.0 4848.3 26.6 4843.0 16.8 4851.5 2/27/2008 15.1 4854.9 I 14.8 4853.3 19.2 4848.2 [ 26.7 4842.9 16.9 4851.4 3/4/2008 15.2 4854.8 I 14.8 4853.2 19.1 4848.2 26.8 4842.7 16.9 4851.4 3/13/2008 15.3 4854.7 14.8 4853.2 19.1 4848.2 26.9 4842.7 16.8 4851.5 3/19/2008 15.3 4854.6 14.9 4853.2 19.2 4848.2 26.9 4842.7 16.8 4851.6 3/26/2008 15.3 4854.6 15.0 4853 1 19.1 4848.2 MEM 4842.5 16.8 4851.6 4/2/2008O 4854.5 15.0 4853.1 19.2 4848.2 Mai 4842.4 16.8 4851.E 4/8/2008 15.4 4854.5 € 15.0 4853.1 19.1 4848.2 ME 4842.3 16.8 4851.5 4/18/2008 15.4 4854.5 15.1 4853.0 19.3 4848.1 28.2 4841.4 19.8 4848.6 4/23/2008 15.5 4854.5 i 14.9 IMEN 15.2 4852.2 4848.1 16.1 ME 4/29/2008MI 4854.5 = 14.8 4853.2 15.0 4852.3 21.6 4848.0 : 14.4 4853.91111111111111 5/6/2008 15.5 4854.5 € 14.6 4853.5 18.7 4848.7 27.6 4842.0 : 13.8 4854.5 5/15/2008 15.6 4854.4 14.4 4853.7 M_4849.7 M 4842.4 13.1 4855.3 5/21/2008 15.6 4854.4 i 13.7 4854.4 17.2 4850.2 25.5 : 4844.1 13.1 0 5/28/20081MM 4854.9 I 13.3 4854.7 16.4 4850.9 I 25.3 4844.2 11.9 4856.4 6/6/2008 15.0 4855.0 _ 13.5 4854.6 16.3 4851.1 25.3 4844.3 8.4 4859.9 6/9/2008 15.0 4855.0 13.4 4854.7 16.2 4851.2 25.3 4844.2 7.2 4861.2 6/18/2008 15.5 4854.5 I 14.0 4854.1 16.7 4850.7 En 4842.3 7.8 4860.5 6/25/2008 15.5 4854.5 13.3 4854.7 16.7 4850.7 EIN 4842.5 8.0 4860.4 7/1/2008 15.5 4854.5 12.6 4855.5 16.7 4850.7 26.9 4842.7 i 8.3 4860.0 7/11/2008 15.5 4854.5 12.3 4855.7 16.6 4850.7 26.8 4842.7 8.4 4859.9 7/17/2008 15.6 4854.4 I 12.4 4855.7 16.7 4850.7 26.8 4842.7 8.3 4860.0 7/23/2008 15.8 4854.1 = 12.6 4855.5 16.7 4850.7 27.0 4842.6 8.4 4859.9 8/1/2008 15.8 4854.2 12.E 4855.5 16.E 4850.7 ` 26.9 4842.7 I 8.3 4860.1 8/13/2008 15.7 4854.3 E 12.4 4855.7 16.7 4850.7 26.8 4842.8 : 8.3 4860.0 8/20/2008 15.6 4854.4 12.5 4855.6 16.8 4850.6 26.8 4842.8 8.4 4859.9 8/26/2008 15.5 4854.5 12.6 4855.5 16.7 4850.7 26.7 4842.9 8.3 4860.0 9/3/2008 15.4 4854.5 E 12.7 4855.4 16.6 4850.7 26.7 4842.9 8.3 4860.1 9/9/2008MN 4854.7 12.8 4855.3 16.7 4850.7 26.7 4842.9 8.3 4860.0 9/18/2008 15.2 4854.8 I 13.0 4855.1 17.0 4850.3 26.8 4842.7 . 8.4 4859.9 9/24/2008 15.1 4854.9 i 13.2 4854.9 17.3 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4852.7 19.8 4847.5 27.8 4841.7 12.3 4856.0 1/15/2009 15.E 4854.4 I 15.5 4852.E 19.8 4847.E J 27.9 4841.7 12.5 4855.9 IMIMIIMMEIIM 1/23/2009 15.6 4854.4 15.5 4852.6 19.7 4847.7 27.9 4841.7 12.5 4855.9 1/27/2009 15.6 4854.4 15.3 4852.7 20.0 4847.3 I 28.1 4841.5 � 12.3 4856.0 2/4/2009 15.7 4854.3 15.3 4852.8 20.3 4847.0 28.2 4841.4 i 12.3 4856.1 2/12/2009 15.7 4854.3 I 15.3 4852.7 20.6 4846.7 28.2 4841.4:,... 12.1 4856.3 2/16/2009 15.7 4854.3 I 15.2 4852.9 21.0 4846.3 28.2 4841.4 i 11.0 4857.4 2/27/2009 15.8 4854.2 15.3 4852.8 21.5 4845.8 28.3 4841.3 i 10.7 4857.7 3/4/2009 15.8 4854.2 _ 15.3 4852.8 21.8 4845.5 28.3 4841.2 9.8 4858.5 3/9/2009 15.8 4854.1 I 15.4 4852.7 22.4 4844.9 28.6 4841.0 9.3 4859.1 3/19/2009 15.8 4854.1 E 15.5 4852.6 22.5 4844.8 28.8 4840.8 I 9.0 4859.4 McGrane Water Engineering, LLC Page C-5 Of C-20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com NCC Pit#1 Monitoring Wells(4 of 7) Well:1 1 2 3 4 5 6 i 7 8 Date 1 Depth to GW Depth to GW 1 Depth to 1 GW Depth to 1 GW Depth to GW 1 Depth to 1 GW 1 Depth to 1 GW Depth to 1 GW Sampled I GW Elevation GW Elevation 1 GW 1 Elevation GW :Elevation GW Elevation 1 GW 1 Elevation i GW 1 Elevation GW 1 Elevation 3/24/20091 15.8 4854.1 15 6 4852.5 I 22.7 I 4844.7 28.8 I 4840.7 8 8 4859.6 4/2/20091 15.8 4854.1 15 5 4852.6 I 22.6 I 4844.7 28.9 I 4840.7 8.6 4859.8 1 4/6/20091 15.9 4854.0 15.6 4852.5 1 22.6 I 4844.7 29.0 1 4840.6 8.3 4860.0 1 • 4/15/20091 16.0 4854.0 al 1 18.8 1 4848.5 28.8 1 4840.7 9.4 4858.9 4/21/20091 15.9 4854.0 I 174 - 4849.9 28.2 - 4841.4 8.5 48599 - E 4/29/2009- 15.9 4854.0 I 16.3 : 4851.0 27.3 : 4842.2 7.5 4860.9 1 :1111M 5/5/20091 15.8 4854,1 1 16.4 € 4850.9 27.5 1 4842.1 4.5 4863.9 1 5/11/20091 15.7 4854.3 1 17.3 . 48501 27.E 1 4842.0 2.7 4865.7 i 1 [ 5/19/20091 14.8 4855.1 17.3 I 4850.1 27.3 4842.3 4.9 4863.4 • __ 5/27/20091 14.5 4855.5 I 16.8 I 4850.6 26.7 : 4842.9 5.2 4863.2 I ` __. __.____ _____._ 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4849.2 25.2 1 4844.4 1 11.7 4856.7 1 7/19/20121 17.8 4852.1 19.3 1 4848.8 18.8 1 4848.5 27.8 1 4841.8 1 11.4 4856.9 1 7/24/20121 18.0 4852.0 19.6 1 4848.5 18.9 1 4848.4 27.8 1 4841.7 1 11.5 4856.9 1 8/2/20121 18.3 4851.7 19.8 r 4848.2 18.8 4848.6 27.7 '4841.9 1 11.7 4856.7 1 • 8/10/2012 18.3 4851.6 20.1 1 4848.0 18.8 . 4848.6 27.7 r 4841.9 1 11.7 4856.7 8/14/20121 18.4 4851.5 20.4 1 4847.7 19.0 1 4848.3 27.9 1 4841.7 1 11.8 4856.5 1 1 1 8/22/2012 18.6 4851.4 20 6 4847 5 t 19.2 1• 4848.2 28.2 1 4841.4 12 0 4856.4 8/29/20121 18.8 4851.1 21 0 4847 1 24.5 ....4842.8 32.3 1..4837.2 1 12 1 4856.3 9/6/2012 19.0 4851.0 21.3 1 4846.7 24.8 - 4842.6 32.5 r 4837.1 1 12.1 4856.3 9/11/20121 19.1 `4850.9 21.5 4846.6 25.0 4842.3 32.6 1..4837.0 1 12.0 4856.4 9/20/20121 19.3 4850.7 21.8 1 4846.3 25.2 1 4842.2 32.8 r 4836.8 1 11.7 4856.7 1 • 9/24/20121 19.3 4850.6 21.9 4846.2 25.4 4841.9 33.0 4836.6 11.6 10/4/2012 i 19.4 4850.5 22.0 1 4846.1 25.6 1 4841.7 33.1 r 4836.5 11.5 10/8/20121 19.5 4850.5 22.3 1 4845.8 25.8 l 4841.6 33.2 1..4836.4 1 11.4 4856.9 1 10/16/20121 19.6 4850.4 22.3 1 4845.7 25.8 '4841.5 33.2 '4836.4 1 11.5 4856.9 10/24/20121 19.6 1 4850.4 22.4 4845.7 26.0 1 4841.3 33.3 1 4836.3 1 11.3 4857.0 • 11/1/20121 19.8 4850.2 22.5 1 4845.E 26.1 1 4841.2 33.3 1 4836.3 1 11.5 4856.9 • 1 1 • 11/7/20121 19.8 4850.1 22.7 1 4845.4 26.3 j 4841.1 33.3 j 4836.3 1 11.E 4856.8 - 1 1 11/14/20121 20.0 : 4850.0 22.9 1 4845.2 26.4 r 4840.9 33.3 r 4836.3 1 11.8 4856.6 11/23/20121 20.3 4849.6 23.7 4844.4 1 26.5 '4840.8 33.3 T4836.3 12.4 4855.9 McGrane Water Engineering, LLC Page C-7 of C-20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com NCC Pit#1 Monitoring Wells(6 of 7) 11111101/1 2 3 0 5 • 6 • 7 Date 1 Depth to GW Depth to GW Depth to 1 GW Depth to 1 GW Depth to GW 1 Depth to 1 GW 1 Depth to 1 GW Depth to GW Sampled 1 GW Elevation GW Elevation GW i Elevation GW i Elevation GW Elevation 1 GW 1 Elevation i GW 1 Elevation GW Elevation 11/29/20121 20.8 4849.2 25 2 4842 9 26.7 1 4840.7 33.3 1 4836.3 13 2 4855.2 12/6/2012- 20.8 4849.1 25 8 ' 4842 2 26.77 4840.7 33.3 r 4836.3 13 7 4854.7 1 12/12/20121 21.2 4848.8 26.1 4842.0 26.8........1 4840.5 33.3 . 4836.3 14.1 4854.3 1 • 12/18/20121 21.3 ' 4848.6 26.3 4841.8 26.9 1 4840.4 33.3 r.4836.3 14.5 4853.9 1 12/27/20121 21.6 4848.4 26.7 4841.4 27.1 1 4840.2 33.3 1 4836.3 15.0 4853.4 1 1 1/3/20131 21.8 4848.2 26.9 ' 4841.2 27.2 1 4840.2 33.3 1 4836.3 15.3 4853.1 1 1/11/20131 21.9 4848.0 27.5 4840.E 27.3 j 4840.1 33.3 j 4836.3 15.E 4852.8 1 1 1 1/17/2013 22.3 4847.7 28.3 4839.8 27.3 4840.0 33.3 r 4836.3 15.5 4852.9 EMI 1/22/20131 23.4 4846.5 28.9 4839.2 27.3 1 4840.1 33.3 1 4836.3 15.4 48529 1/30/2013 23.0 4847.0 29.8 4838.2 27.3 1 4840.1 33.3 1 4836.3 15.3 4853.0 2/6/20131 23.1 4846.9 29.8 4838.2 27.3 j 4840.0 33.3 j 4836.3 15.3 4853.1 1 2/12/2013 23.3 4846.7 29.9 4838.2 27.37 4840.1 33.3 r 4836.3 15.0 4853.4 1 2/21/20131 23.3 4846.6 29.8 4838.2 27.4 4839.9 33.3 1 4836.3 14.8 4853 51 ...............................................:....................................................................................................................................................................................:.........................................................................:.............................................................................................................:....................................:................................... 2/27/2013 1 23.4 4846.5 29.8 4838.2 27.3 1 4840.0 33.3 1 4836.3 14.2 4854.2 3/4/2013 1 23.6 4846.4 29.9 4838.2 27.3 1 4840.0 33.3 1 4836.3 13.3 3/13/20131 23.7 4846.3 30.0 4838.1 27.4 1 4839.9 33.3 1 4836.3 11.9 3/22/20131 23.8 4846.1 29.9 4838.2 27.3 1 4840.0 33.3 1 4836.3 11.3 4857.1 1 MIN 3/26/20131 24.0 4846.0 29.9 4838.2 27.4 1 4839.9 33.3 1 4836.3 10.8 4857.6 1 4/2/20131 24.1 4845.9 30.0 4838.1 27.5 1 4839.8 33.3 1 4836.3 10.5 4857.9 1 1 Mal 4/12/20131 24.3 4845.7 30.0 4838.1 27.6 1 4839.7 33.3 1 4836.3 10.4 4857.9 1 allanalle • • 4/17/20131 24.0 4846.0 29.8 4838.2 27.4 1 4839.9 33.3 1 4836.3 10.3 4858.0 1 ...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................NM 4/25/20131 23.9 4846.0 29.8 4838.3 27.4 1 4839.9 33.3 1 4836.3 10.3 4858.1 1 5/1/20131 23.8 4846.2 29.8 4838.2 27.3 1 4840.0 33.3 1 4836.3 10.3 4858.0 ...............................................:.....................................................................................................................................................................................:.........................................................................:.............................................................................................................:....................................:................................... 5/9/20131 23.8 4846.2 29.9 4838.2 27.2 1 4840.2 33.3 1 4836.3 10.4 4857.9 1 5/14/20131 23.6 4846.4 29.8 4838.3 26.9 1 4840.4 33.3 1 4836.3 10.6 4857.8 1 • 5/22/20131 23.3 4846.6 29.7 4838.4 26.8 1 4840.6 33.3 1 4836.3 10.6 4857.8 1 5/30/20131 22.9 4847.0 29.2 4838.9 25.6 1 4841.7 32.3 1 4837.2 10.3 4858.0 1 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... MI 6/7/20131 22.6 4847.4 28.3 4839.8 24.2 1 4843.2 31.3 1 4838.3 10.1 4858.3 1 Mill 6/14/20131 22.3 4847.6 27.6 4840.5 23.1 1 4844.2 30.5 1 4839.1 9.9 4858.4 1 6/19/20131 22.3 4847.7 27.4 4840.7 22.9 1 4844.4 30.8 1 4838.8 10.1 4858.3 1 • • 6/25/20131 22.1 4847.9 27.3 4840.8 22.6 1 4844.7 30.7 1 4838.9 10.0 4858.4 1 ..............................................:............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 7/3/2013 1 21.9 4848.0 27.0 4841.1 22.4 1 4844.9 30.7 1 4838.9 9.9 4858.4 1 7/11/20131 21.8 4848.1 26.9 4841.2 22.3 1 4845.0 30.6 1 4839.0 9.9 4858.4 7/15/20131 21.8 4848.2 26.8 4841.2 22.0 1 4845.3 30.5 1 4839.1 9.8 4858.5 1 • 7/23/20131 21.8 4848.1 .26.8 4841.3 22.1 1 4845.2 30.E 1 4839.0 4858.4 1 • 1 7/30/20131 21.8 48482 26.9 4841.2 22.3 1 4845.1 30.6 i 4839.0 4858.5 1 8/8/2013 1 21.7 4848.3 27.1 4841.0 22.3 1 4845.1 30.5 1 4839.1 9.9 4858.4 1 • ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... IIM 8/14/20131 21.8 _ 4848.2 27.0 4841.1 22.3 1 4845.0 30.6 1 4839.0 10.0 4858.4 1 i Mill 8/22/20131 21.8 4848.1 27.1 4841.0 22.2 1 4845.2 30.6 1 4839.0 9.9 4858.4 8/27/20131 22.3 4847.E 27.2 4840.9 22.3 1 4845.1 30.8 1 4838.8 10.0 4858.4 1 9/3/20131 21.8 4848.1 27.3 4840.8 22.2 1 4845.2 30.7 1 4838.9 10.1 4858.3 1 9/11/20131 21.8 4848.2 27.3 4840.8 22.3 1 4845.1 30.8 1 4838.8 10.2 4858.2 1 9/20/2013. 9/27/20131 9.9 4860.0 8.4 4859.7 11.3 1 4856.0 10.0 1 4859.6 7.8 4860.5 1 • 10/3/20131 10.0 4860.0 8.5 4859.E 11.4 1 4855.9 10.2 1 4859.4 7.8 4860.5 1 10/8/2013 10.1 4859.9 8.6 4859.5 11.6 1 4855.7 10.3 1 4859.3 8.0 4860.4 1 10/16/20131 10.2 4859.8 8.5 4859.6 11.6 1 4855.7 10.4 1 4859.2 8.1 4860.3 1 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 10/23/20131 10.3 4859.6 8.4 4859.7 11.7 1 4855.7 10.5 1 4859.1 8.3 4860.1 1 Mill MI 10/29/20131 10.4 4859.5 8.6 4859.5 11.6 1 4855.7 10.5 1 4859.1 8.3 4860.0 1 11/4/20131 10.5 4859.5 8.6 4859.5 11.7 1 4855.7 10.7 1 4858.9 8.3 4860.0 1 11/13/2013- 10.5 4859.5 8 8 4859.3 11.8 - 4855.6 10.8 - 4858.8 8 5 4859.9 1 11/19/20131 10.7 4859.3 8.8 4859.2 11.9 1 4855.4 10.8 1 4858.8 8.6 4859.8 1 all 11/27/20131 10.8 4859.1 8.8 4859.2 12.0 14855.3 10.8 1 4858.7 8.6 485981 1 111111111 12/4/20131 10.9 4859.0 9.0 4859.1 12.2 1 4855.2 10.9 1 4858.7 8.7 4859.7 1 12/12/20131 10.8 4859.1 9.1 4859.0 12.2 1 4855.2 11.1 1 4858.5 12/18/20131 10.8 4859.2 9.2 4858.9 12.3 1 4855.1 11.3 1 4858.3 ailli 12/23/20131 10.9 4859.0 9.1 4859.0 12.2 1 4855.2 11.3 1 4858.2 8.9 4859.4 1 1/2/20141 11.4 4858.5 9.6 4858.5 12.5 1 4854.8 11.5 1 4858.1 8.8 4859.5 1 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 1/7/20141 11.9 4858.0 10.2 4857.9 12.8 1 4854.5 12.4 1 4857.2 9.0 4859.4 1 • 1/15/20141 12.3 4857.7 10.8 4857.3 13.7 1 4853.7 13.5 1 4856.1 8.9 MEll 1/22/20141 12.5 4857.5 11.5 4856.6 14.4 1 4852.9 14.5 1 4855.1 8.9 1/28/20141 12.7 4857.3 12.4 4855.7 15.3........1 4852.0 15.E 1 4854.0 9.0 4859.4 1 2/5/20141 13.2 4856.8 13.1 4855.0 16.0 1 4851.3 16.3 1 4853.2 9.1 4859.3 1 2/12/20141 13.6 4856.4 14.0 4854.1 16.7 1 4850.7 17.2 1 4852.4 8.9 4859.4 1 1 2/21/20141 13.9 4856.0 14.8 4853.3 17.6 1 4849.7 17.9 1 4851.7 9.0 4859.4 1 1 2/25/2014 14.2 4855.8 15.4 4852.7 18.6 l 4848.7 18.9 l 4850.7 9.0 4859.4 3/4/20141 14.4 ' 4855.5 15.9 4852.2 19.3 1 4848.0 19.7 1 4849.9 8.9 4859.4 1 McGrane Water Engineering, LLC Page C 8 of C 20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com NCC Pit#1 Monitoring Wells(7 of 7) Well: 1 2 3 4 5 6 7 8 Date Depth to GW I Depth to I GW Depth to GW Depth to GW I Depth to GW Depth to GW Depth to GW I Depth to GW Sampled GW Elevation I GW I Elevation GW Elevation GW Elevation I GW Elevation GW Elevation GW Elevation i GW Elevation 3/13/2014 14.3 4855.6 I 16.5 1 4851.6 20.0 4847.3 20.1 4849.5I 8.9 4859.4 3/19/2014 14.5 4855.5 I 16.8 1 4851.3 20.8 4846.5 20.8 4848.7 1 8.8 4859.5 3/27/2014 14.4 4855.5 ` 17.1 1 4851.0 ®. 4846.0 21.6 4848.0 I 9.0 4859.4 11.11.111111.011.1.1111 4/2/2014 14.5 4855.5 17.2 1 4850.9 24.0 4843.3 21.7 4847.9 I 9.1 4859.3 4/8/2014 14.5 4855.5 17.3 I 4850.8 21.6 4845.7 21.8 4847.7I 9.1 4859.3 4/17/2014 14.6 4855.4 17.3 1 4850.7 21.8 4845.6 22.0 4847.6 I 9.2 4859.2 • 4/22/2014 4855.3 17.3 4850.8 21.9 4845.4 22.1 4847.5 I 9.1 4859.3 5/1/2014 14.8 4855.2 17.3 1 4850.7 22.0 4845.3 22.3 4847.2_1 9.0 4859.4 5/8/2014 14.7 4855.3 17.4 1 4850.7 22.1 4845.2 22.5 4847.1 I 8.9 4859.4 5/14/2014 14.8 4855.2 17.5 4850.E 22.3 4845.1 22.3 4847.2 I 9.0 4859.4 5/22/2014 14.8 4855.1 17.4 14850.7 22.4 4844.9 22.3 4847.3 I 9.0 4859.4 1 5/27/2014 14.9 4855.0 17.5 1 4850.6 22.5 4844.8 22.4 4847.2I 8.9 4859.4 6/4/2014 14.8 4855.1 17.4 I 4850.7 22.4 4844.9 22.5 4847.1 I 8.8 4859.5 6/10/2014 14.9 4855.0 17.3 4850.7 22.5 4844.8 22.4 4847.2 8.9 4859.4 1 6/19/2014 15.0 4855.0 17.4 I 4850.7 22.5 4844.8 22.4 4847.2I 9.0 4859.4 6/24/2014 14.9 4855.0 1 17.5 4850.6 22.6 4844.7 22.7 4846.9 8.9 4859.4 7/13/2014 14.8 4855.1 17.6 1 4850.5 22.5 4844.8 22.8 4846.8 I 8.8 4859.5 7/9/2014 14.9 4855.0 17.7 1 4850.4 22.6 4844.7 22.8 4846.71 8.9 4859.4 7/16/2014 15.0 4855.0 17.8 1 4850.3 22.7 4844.7 22.9 4846.71 9.0 4859.4 7/23/2014 15.1 4854.9 17.8 I 4850.2 22.8 4844.6 23.0 4846.6I 8.9 4859.4 7/29/2014 15.2 4854.8 I 17.8 I 4850.3 22.7 4844.7 23.0 4846.6I 9.0 4859.4 8/5/2014 15.2 4854.8 I 17.8 I 4850.2 22.8 484.4 6 23.1 4846.5 I 9.1 4859.3 • 8/14/2014 15.3 4854.7 17.9 I 4850.2 22.8 4844.E 23.2 4846.4 i 9.2 4859.2 9/10/2014 15.4 4854.5 17.9 I 4850.2 22.8 4844.5 23.3 _4846.3 ` 9.2 4859.2 10/16/20141 4854.6 17.9 I 4850.2 23.0 4844.3 23.2 4846.4 I 9.3 4859.1 11/12/2014 15.6 4854.4 I 18.1 I 4850.0 23.2 4844.2 23.3 4846.2I 9.6 4858.8 12/12/2014 15.8 4854.2 I 18.3 1 4849.7 23.4 4843.9 23.7 4845.9 I 9.8 4858.5 1/22/2015 15.9 4854.0 18.3 1 4849.7 23.3 4844.0 15.4 4854.2I 10.0 4858.4 al! 1 2/18/2015 15.8 4854.1 18.2 1 4849.9 23.3 4844.0 23.3 4846.2I 9.8 4858.5 • 3/17/2015 15.7 4854.3 18.1 1 4850.0 23.3 484.41 22.8 4846.7I 9.8 4858.E 4/8/2015 15.9 4854.0 17.9 I 4850.2 22.5 4844.8 22.7 4846.9I 9.7 4858.7 5/20/2015 15.7 4854.3 17.5 14850.6 22.2 4845.2 22.5 4847.1 I 9.3 4859.0 6/17/2015 14.5 4855.5 16.4 I 4851.7 21.7 4845.7 22.0 4847.6 I 8.1 4860.3 1 7/7/2015 14.4 4855.5 16.2 1 4851.9 20.9 4846.4 21.7 4847.9I 7.4 4860.9 8/19/2015 14.4 4855.5...f..........15.9 4852.2 20.8 4846.5 21.8 4847.7 I 7.5 4860.9 9/15/2015 15.0 4855.0 1 16.4 j 4851.7 21.3 4846.1 22.5 4847.1!!!!!1!! 8.1 4860.3 10/13/2015 15.5 4854.5 16.E 1 4851.5 21.8 4845.6 22.9 4846.7I 8.8 4859.5 • 11/17/2015 15.8 4854.1 17.1 1 4851.0 23.0 4844.3 23.7 4845.9 1 9.8 4858.E 1 • 12/16/2015 16.8 4853.1 18.1 I 4850.0 ® 4844.1 24.2 4845.4 I 10.7 4857.7 IIIMIMIIIIIIIIIIIMIIIIIIIIIIIIIMIIIIIIIIIIIMIIIIIIIIIIIIMIIUIIIIIIIII 1/19/2016 17.3 4852.6 18.5 1 4849.6 23.6 4843.7 24.2 4845.4I 11.0 4857.4 2/17/2016 17.6 4852.4 I 19.3 I 4848.8 24.1 4843.2 24.5 4845.1 1 11.3 4857.1 3/3/2016 18.3 4851.6 I 20.1 1 4848.0 24.2 4843.2 24.8 4844.7 I 11.8 4/13/2016 19.8 4850.1 I 21.0 1 4847.1 24.3 4843.1 I 5/10/2016 20.0 4850.0 I 21.7 4846.4 24.8 4842.6 I 6/23/2016 18.9 4851.0 1 20.5 .1-4847.6 23.4 4843.9 7/19/201E...........193........., 4850.7................19.9..........1 4848.2 24.2................4843:...... .................................. 8/24/2016 19.2 4850.8 19.8 1 4848.2 24.8 4842.E I Ma 9/20/2016 20.3 4849.7 i 21.3 1 4846.7 25.2 48422 • 10/8/2016 21.4 4848.5 I 22.8 1 4845.2 25.6 4841.7 11/16/2016 22.3 4847.6 I 24.2 1 4843.9 26.1 4841.2 I 12/13/2016 24.2 4845.8 I 27.4 1 4840.7 26.6 4840.7 i 1/17/2017 25.1 4844.9 1 28.2 14839.9 27.0 4840.3 2/15/2017 25.8 4844.1 1 29.7 1 4838.4 27.8 4839.6 4/27/2018 29.3 4840.6 I 25.9 4841.4 5/16/2018 29.4 4840.5 i 26.2 4841.2 • 6/12/2018 29.7 4840.3 I 26.4 4840.9 7/18/2018 29.9 4840.0 26.7 4840.7 8/8/2018 29.0 4841.0 `_I • 26.3 4841.1 9/20/2018 29.3 4840.7 26.8 4840.E CGTIIIIMIIIIIIIMIIIIIIIIIIIIIIIMIIIIIIIIIIIIIIIIIIII 10/16/2018 29.3 4840.E 26.8 4840.5 i 11/21/2018 29.2 4840.8 I • 27.1 48402 12/11/2018 29.E 4840.4 I...................................t 27............................................. .:3...............4840:.1....... 1/15/2019 29.9 4840.0 McGrane Water Engineering, LLC Page C-9 of C-20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Appendix C -Thornton"Z" Well Data and Plot •• co / 0 N m ri 00 i r. ri O rq r•1 00 t0 ri 0 N L N.4 N. CO CD H ......0 N N 4 N ri j •L ono u, '2 r p C N 1 2 m r-I r♦ N N CO m 2 ri G 0 4 N ll C m •. r-1 0 m L IN ri 0 IN 4. m r O0 ri ri 0 MI S � 00 4 ri 0 N m 00 t0 nt N 0 00 '.0 N 0 00 0o0 0000 0000 000 0000 0o0 coN ONO coo 000 2 co eT Q . . cr et a go. . c. (Ise 4)ialennpunoig to uo!lena13 McGrane Water Engineering,LLC Page C-10 of C-20 1669 Apple Valley Rd. • Lyons,CO 80540 • Phone: (303)917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Thornton Z Wells Monitoring Data (1 of 1) MW-Z1 : • MW-Z2 I •. MW-Z1 MW-Z2 Top of PVC •• : ••. ••4869.73 I -- 4870.05 . . Elevation(ft)* .•• ••. .•• ••Depth to i i Depth to i Depth to Depth to water Date of water from I GW GW Date of 1 water from 1 GW water from GW Measurement top of PVC :Elevation from top of Elevation Measurement: top of PVC : Elevation top of PVC Elevation PVC(ft) (ft) i : (ft) : (ft) 8/13/2010 4.25 : 4865.48 5.40 4864.65 12/16/2013 : 8.54 : 4861.19 9.09 4860.96 9/16/2010 5.22 i 4864.51 6.33 4863.72 1/21/2014 i 9.03 i 4860.70 9.40 4860.65 10/14/2010 6.06 i 4863.67 6.76 4863.29 2/18/2014 i 9.34 i 4860.39 9.79 4860.26 11/16/2010 8.31 i 4861.42 1 8.92 4861.13 3/31/2014 I 11.85 I 4857.88 12.50 4857.55 12/3/2010 9.20 i 4860.53 9.90 4860.15 4/21/2014 i 13.30 i 4856.43 13.61 4856.44 1/11/2011 •. 11.40 4858.65 6/18/2014 I 8.90 I 4860.83 9.95 4860.10 2/15/2011 11.49 i 4858.24 12.34 4857.71 7/29/2014 i 7.61 i 4862.12 8.31 4861.74 3/15/2011 12.10 i 4857.63 12.90 4857.15 8/19/2014 i 6.50 i 4863.23 7.20 4862.85 4/19/2011 11.85 i 4857.88 12.70 4857.35 9/23/2014 i 5.75 i 4863.98 6.13 4863.92 5/17/2011 8.10 :4861.63 9.40 4860.65 10/23/2014 : 7.93 : 4861.80 8.41 4861.64 6/16/2011 7.60 i 4862.13 8.50 4861.55 11/20/2014 i 12.25 i 4857.48 12.20 4857.85 7/25/2011 4.87 i 4864.86 5.85 4864.20 12/23/2014 i 12.33 i 4857.40 12.33 4857.72 8/17/2011 3.35 i 4866.38 4.81 4865.24 1/20/2015 i 12.64 i 4857.09 12.84 4857.21 9/20/2011 4.20 i 4865.53 5.38 4864.67 2/10/2015 i 13.03 i 4856.70 13.40 4856.65 ; ! 10/21/2011 5.37 i 4864.36 6.22 4863.83 3/1/2015 : 14.71 : 4855.02 14.75 4855.30 11/23/2011 6.64 i 4863.09 7.63 4862.42 6/9/2015 i 8.89 i 4860.84 9.55 4860.50 12/21/2011 8.60 :4861.13 8.80 4861.25 7/20/2015 : 7.23 : 4862.50 8.07 4861.98 1/27/2012 8.10 i 4861.63 9.59 4860.46 8/17/2015 i 6.60 i 4863.13 6.95 4863.10 2/28/2012 8.75 :4860.98 10.50 4859.55 9/29/2015 : 6.75 : 4862.98 7.07 4862.98 3/26/2012 8.90 i 4860.83 10.83 4859.22 10/19/2015 i 7.23 i 4862.50 7.80 4862.25 4/24/2012 8.20 1 4861.53 10.25 4859.80 12/7/2015 1 8.30 1 4861.43 8.93 4861.12 5/17/2012 7.15 i 4862.58 8.75 4861.30 1/28/2016 i 9.41 i 4860.32 10.35 4859.70 6/19/2012 5.75 1 4863.98 7.10 4862.95 3/15/2016 1 10.20 1 4859.53 11.15 4858.90 7/18/2012 4.80 i 4864.93 6.30 4863.75 6/7/2016 i 9.33 i 4860.40 10.70 4859.35 8/21/2012 5.78 1 4863.95 6.82 4863.23 7/22/2016 : 8.13 1 4861.60 9.30 4860.75 9/24/2012 6.89 i 4862.84 7.72 4862.33 9/27/2016 i 1 7.01 4863.04 10/22/2012 6.30 1 4863.43 7.05 4863.00 10/24/2016 1 7.13 1 4862.60 7.35 4862.70 11/19/2012 7.14 i 4862.59 1 8.23 4861.82 1/10/2017 i 11.38 i 4858.35 11.83 4858.22 12/18/2012 8.85 1 4860.88 10.11 4859.94 3/10/2017 1 12.03 1 4857.70 12.58 4857.47 1/24/2013 9.73 i 4860.00 1 11.19 4858.86 6/23/2017 i 9.12 i 4860.61 8.43 4861.62 2/18/2013 10.15 1 4859.58 11.62 4858.43 9/22/2017 1 11.54 1 4858.19 10.22 4859.83 3/19/2013 10.55 i 4859.18 12.01 4858.04 1/12/2018 i 14.60 i 4855.13 14.13 4855.92 4/26/2013 10.15 1 4859.58 11.50 4858.55 3/27/2018 1 13.47 1 4856.26 13.65 4856.40 5/24/2013 8.90 i 4860.83 10.02 4860.03 6/20/2018 i 7.43 i 4862.30 7.73 4862.32 6/19/2013 8.88 i 4860.85 9.98 4860.07 9/20/2018 i 7.63 i 4862.10 8.05 4862.00 8/6/2013 5.70 i 4864.03 , 6.74 4863.31 12/21/2018 i 9.19 i 4860.54 10.21 4859.84 8/29/2013 6.40 i 4863.33 7.42 4862.63 3/28/2019 1 10.64 1 4859.09 11.36 4858.69 9/23/2013 4.20 i 4865.53 5.24 4864.81 6/19/2019 i 8.63 i 4861.10 9.31 4860.74 10/31/2013 6.28 1 4863.45 MINIM 4862.93 8/6/2019 1 8.79 1 4860.94 8.63 4861.42 *Note:Elevation and SWL Ele data extracted from'Zadel Pit.xls' McGrane Water Engineering, LLC 1 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 Page C-1 of C-20 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Appendix C - LG-Everist Monitoring Well Data and Plots / 900Z/E/ZI 9007/f/t I 900Z/E/OI 9007/E/6 ' 900Z/E/8 t0 <1 0 c 4\ i 9ooz/f/t 3 el, 900Z/f/9 2 8 900Z/E/S i 1 N in 900Z/£/P 0 900Z/f/f 3 00 / 'maw C / 900Z/E/t O / C swami o o / SOOZ/£/tI 3 inI SOOZ/f/Ot .41 SOOZ/E/6 .e L ' SOot/f/8 CI 0 6 I SOOZ/E/L 2 E I 5007/f/9 o SOOZ/£/S R to SOOZ/f/P .... 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Q Q' " Q w <, i F0 2 a McGrane Water Engineering, LLC Page C-1 3 of C-20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Appendix C - Rankin Monitoring Well Data and Plots 4 } 810ct <1. a/ 91 Oe/ a/ \'4 Sl. c.c., a Il Ot/a cc 0 /! } C a .O51 .. tl 0 m ..6., lir oA 0 �� /a/` rlo� ,! Y /aj` C ce of cc Off/ a/ 60 44idirl a 0c,..., 'PO .1 or/a ,� /< _ oo,/a .90 Lri 0 0 CO CO 00 CO u 0 Off/LP a (Ise 4)Jalennpunoa9 to uoilena13 McGrane Water Engineering,LLC Page C-14 of C-20 1669 Apple Valley Rd. • Lyons,CO 80540 • Phone: (303)917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Rankin Wells(1 of 6) WeII ID:: R1 R2 R3 R4 R5 R6 Elevation' 4861.53 -- 4863.05 -- 4862.64 -- 4861.76 -- 4862.91 -- 0 -- Date Sampled :Depth to GW GW Depth to GW Depth to GW GW Depth to GW : ' GW Depth to GW Elevation GW Elevation Elevation GW ;Elevation ;Depth to GW Elevation GW Elevation 7/4/2006 5.8 4855.7 6.3 4856.7 5.5 4857.1 4.2 : 4857.6 3.5 4859.4 7/10/2006 5.8 4855.8 6.1 48570 5.3 4857.4 3.8 4857.9 3.4 ! 4859.5 7/19/2006: 6.0 4855.5 5.8 4857.2 5.0 4857.6 3.8 4858.0 3.5 ! 4859.4 7/26/2006 5.8 4855.7 5.9 4857.1 5.2 4857.5 3.7 4858.1 3.5 ! 4859.4 8/3/2006 5.9 IIMINIMI 4856.8 5.3 . 4857.4 . 3.8 ' 4858.0 ` 3.3 4859.E 8/8/2006! 5.8 4855.7 6.4 4856.6 5.6 4857.1 4.3 ' 4857.4 : 3.7 ! 4859.2 8/17/2006! 5.9 4855.6 6.3 4856.7 5.4 4857.2 4.3 4857.4 3.7 ! 4859.2 8/22/2006 5.9 4855.6 6.3 4856 8 5 5..................48571 4.2 ; 4857.6 3.7 .,.,.,48592.,.,., 8/29/2006 5.8 4855.7 6.4 4856.6 5 5..................48571 4.3 ; 4857.5 ,.............3.8 48592.,.,., 9/6/2006 5.6 4855.9 6.3 4856.8 5.3 4857.4 4.1 4857.7 3.7 ! 4859.2 9/11/2006 5.5 4856.0 9/20/2006: 5.6 9/28/2006: 5.8 4855.8 6.1 4857.0 5.3 4857.4 3.8 4857.9 3.4 ! 4859.5 10/4/2006: 5.9 4855.6 6.3 4856.8 5.3 4857.3 4.1 4857.7 3.5 ! 4859.4 10/12/2006: 6.3 4855.2 6.5 4856.6 5.8 4856.8 4.7 4857.1 3.6 4859.3 10/18/2006 6.5 4855.0 6.6 4856.5 6.0 4856 6 4.8 4857.0 3.7 4859.2 10/25/2006 6.7 4854.9 6 6 4856.5 5.9 4856.7 4.7 ! 4857.1 ! 4.1 4858.8 11/6/2006: 6.8 4.8 4857.0 ' 4.5 11/14/2006: 6.8 4854.7 6.7 4856.4 5.9 4856.7 4.4 : 4857.3 ' 4.6 ! 4858.3 11/21/2006 6.9 4854.6 6.6 4856.5 6.0 4856.6 4.5 4857.3 : 4.8 ! 4858.2 11/28/2006 6.8 4854.8 6.7 4856.4 6.1 4856.6 4.5 4857.3 4.9 ! 4858.0 12/5/2006 7.0 4854 5 6 7 48564 5 8 4856 8 4.6 4857 2 5.2 4857 7 12/11/2006I 7.3 4854 2 6 7 4856.4 5.8 4856 9 4.8 : 4856.9 - 5.8 4857.2 12/19/2006 7.5 4854.0 ataillinalliallaMENEMINMEMENUCall 12/28/2006: 7.4 4854.1 6.8 4856.3 5.9 4856.7 4.8 ! 4857.0 ! 5.8 ! 4857.2 1/5/2007: 7.3 4854.2 6.4 4856.6 6.1 4856.6 4.8 4856.9 5.8 ! 4857.1 ''. 1/10/2007: 7.4 4854.1 6.5 4856.6 6.0 4856.6 4.7 4857.1 5.8 ! 4857.2 '!. 1/16/2007: 7.5 4854.0 6.4 4856.6 6.0 4856.6 4.6 4857.2 5.8 ! 4857.1 1/23/2007 7.3 4854.2 6.5 4856.6 6.0 4856.6 4.8 ; 4857.0 : 5.7 4857.2 1/31/2007: 8.4 EMI 9.2 4853.9 IIMMI 4853.0 78 : 4854.0 4.4 8.1 81�� 2/7/2007i 8.3INEIM :�� 2/12/2007: 8.2 4853.4 9.3 4853.7 10.0 4852.6 8.0 : 4853.8 : 5.2 4857.7 8.3 -8.3 2/20/2007 8.2 4853.4 9.3 4853.7 10.0 4852.6 8.2 4853.6 4.8 ! 4858.2 ! 8.8 -8.8 2/27/2007! 8.0 4853.5 9.1 4854.0 9.8 4852.8 7.8 4854.0 4.4 ! 4858.5 ! 8.4 -8.4 3/6/2007: 7.9 4853.6 9.1 4854.0 9.8 4852.9 7.8 4853.9 4.7 ! 4858.2 ! 8.5 -8.5 3/13/2007 7.8 legla 8.8 4854.2 arrall. 4852.7 80 4853.8 4.7111= 8.6 -8.6 3/24/2007; 7.8 :� 1 10.0 • TM ?�� 4/4/2007 7.8 4853.7 9.0 4854.1 10.1 4852.6 8.1 4853.7 4.8 ! 4858.1 ! 8.8 -8.8 4/10/2007, 7.7 4853.9 9.1 4854 0 101 4852 6 8.3 :▪ 4853.5 5.0 4857 9 8.8 -8.8 4/17/2007! 7.6 4853.9 8.9 4854.1 100 4852.6 81 y...-48537 4.8 4858.2 8.5 8.5 4/25/2007. 7.2 4854.4 8.5 4854.6 9.6 ! 4853.1 7.5 :▪ 4854 3 . 4 0 4858.9 8.3 8.3 5/1/2007! 6.1 4855.4 8.0 4855.1 9.4 4853.2 7.2 4854.E 3.8 4859.1 ! 8.2 -8.2 mm mm5/10/2007! 5.5 4856.0 6.8 4856.2 mm8.3 mm 4854.4 mm 5.3mm 4856.5 mm 2.7 P.. 4860.2 6.0 -6.0 5/16/20071 5.3 4856.2 6.6 4856.5 7.6 4855.1 5.1 4856.7 : 2.3 4860.6 5.5 -5.5 ........... .................. .............. ............... ............ ................. .............. y.......... ................ l ............ ............. ................... 5/23/2007. 5.2 4856.4 6.5 4856 6 6 7 4856.0 5.0 : 4856.8 2.2 4860.7 4.5 -4.5 5/31/2007 5.1 4856.4 6.3 4856.8 4.9 4857.7 4.8 :▪ 4856.9 1.8 4861.1 4.0 -4.0 6/7/2007: 5.0 4856.5 5.8 48572 4.8 4857.9 4.8 :▪ 4856.9 . 1.8 4861.2 3.7 -3.7 6/15/2007: 5.0 4856.5 5.5 4857.6 5 9 4856.7 5.0 : 4856.8 1.8 4861.1 4.5 -4.5 6/20/2007: 4.8 4856.7 5.3 4857.8 5.3 4857.3 4.5 ' 4857.3 ' 1.7 ! 4861.2 4.1 -4.1 6/28/2007: 5.0 4856.5 5.3 4857.7 6.0 4856.6 4.2 4857.6 : 1.3 4861.6 - ........... .................. .............. ............... ............. ................. ................ .y.......... ................ 3.7 3.7............ ............... ................... 7/5/2007! 5.2 4856.4 5.7 48574 58 48568 4.2 : 4857E 13 48616 3.8 -3.8 ........... .................. .............. ............... ............. ................. ................ y.......... ................ ............ ............... ................... 7/10/2007: 5.4 4856.1 5.8 4857 2 5 8 4856 9 4.3 : 4857.5 1.3 4861 7 3.7 -3.7 7/18/2007 5.8 4855 8 6 3 4856 8 6 0 4856 6 3.2 :▪ 4858.6 0.5 4862 4 2.5 2 5 7/25/2007' 6.0 4855.5 6.1 4857.0 4.8 4857.8 1.0 4861.9 2.5 -2.5 8/1/20071 6.0 - 0.8 =MI 2.3 Mal 8/8/2007 6.0 • 0.7 4862 2 INIIIMMI 8/14/2007: 6.1 4855.4 7.6 4855.5 4.7 4858.0 0.8 4862.1 2.5 -2.5 9/21/2007 6.3 4855.3 7.4 4855 6 4 9 4857 7 1.1 4861 8 3.0 -3.0 9/28/2007. 6.6 4854.9 7.3 48557 54 48572 1.3 48617 3.3 -3.3 10/5/2007 6.8 4854.7 7.3 4855.7 6.2 4856.5 1.4 4861.5 4.0 -4.0 10/10/2007: 6.8mm� 4854.7 7.3 4855.7 .__63.m 4856.3 4.3 48586 0.0 10/19/2007: 6.8 1106111MMEM11511 4856.0 alliallialtell- 4861.0 .. -- IIll 10/23/2007 6.9 4854.6 7.5 4855.6 7.0 4855.E 2.2 4860.7 5.0 -5.0 10/31/2007 7.1 4854.4 7.6 4855 5 7 7 4855 0 2.4 4860 5 5.7 -5.7 11/5/2007 7.2 4854.4 7.6 4855 S 7 8 4854 8 2.8 4860 2 6.0 -6.0 11/13/2007 7.3 4854.2 7.7 48554 8.2 4854.5 3.3 48597 6.3 -6.3 11/21/2007: 74 4854.1 7.8 4855.3 8.5 4854.1 3.4 . 4859.5 6.7 -6.7 11/27/2007! 7.5 4854.0 liffillenfillitali 4854.0 r 4859.5 6.8 MEM 12/5/2007 7.6 4853.9 7.9 4855.1 8.9 4853.7 3.6 4859.3 7.2 MEI McGrane Water Engineering, LLC Page C-15 of C-20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Rankin Wells(2 of 6) Well ID:I R7 IIIIIIIIEEMIIIIIMIIIIIIOIIIIIIIIIIIIIICEIIIIIIIIIIIIIIIIIEIIIIIIR6 Elevation` 4861.53 - 4863.05 1 4862.641 -- 4861.76 1 -- 4862.91 - 0 GW mm Depthto GW T _7. GW Depthto --GW ' GW Depth to GW... Date Sampled [Depth to GW Elevation GW 1 Elevation`Depth to GW1 Elevation GW Elevation Depth to GW Elevation GW Elevation 12/11/20071 7.6 1 4853.9 8.0 1 4855.1^, -- 9.2 1 4853.5 3.8 1 4859.2 7.3 -7.3 _.,, 12/19/2007€ 7.6 1 4853.9 8.2 1 4854.9 8.3 1 4854.3 aIIIIIMIIIMII 4.0 I 4858.9 7.5 -7.5 12/27/2007 7.7 1 4853.9 8.4 1 4854.6 , 8.5 ' 4854.1 aIIIIIMIIIIIIIIMME= 7.7 -7.7 1/7/2008 7.8 1 4853.8 1111EMEMI 9.7 1 4853.0 ailillMIIIMIIIIIEIMIEESM 8.2 -8.2 1/14/2008/ 7.8 1 4853.81111M23111111111111111111111EMINEM8.3 -8.3 1/22/2008 7.8 1 4853.8 8.7 1 4854.4 , 9.8 1 4852.9 IIIIIIIIIIINIIIIIIIIIIIEMIUII=118.4 -8.4 1/28/2008' 7.8 1 4853.7 8.8 1 4854.2 9.9 1 4852.7 IIIIIIIIIIMIIIIINIIIZGIIIMICMER 8.7 -8.7 2/5/20081 7.8 1 4853.7 8.9 1 4854.1 E 9.9 1 4852.7 111111111111111Mallarni 8.8 -8.8 2/13/2008: 7.9 1 4853.6 8.9 1 4854.1 10.0 ' 4852.6 4.8 1 4858.1 8.8 -8.8 2/18/2008 8.0 4853.5 9.0 4854.1 10.0 1 4852.6 4.9 4858.0 8.9 8.9 .,,..2/27/20081 8.1 1 4853.4 9.2 4853.9 10.0 4852.6 4.9 4858.0 9.0 9.0 3/4/2008' 8.2 1 4853.4 9.3 1 4853.8 99 1 48527 4.9 1 4858.0 9.1 -9.1 3/13/2008 8.3 1 4853.3 9.3 1 4853.7 10.0 1 4852.6 5.0 1 4857.9 9.0 -9.0 3/19/2008 8.3 4853.2 9.4 4853.6 99 1 4852.7 5.0 1 4857.9 91 9.1 3/26/2008€ 8.3 1 4853.2 9.5 1 4853.6 1 10.0 1---4852 6 51 1 4857.8 9.1 __- 9.1 4/2/20081 8.3 , 4853.2 9.6 4853.5 1 10.1 4852.E 5.1 1 4857.8 9.1 -9.1 4/8/2001 8.3 1 4853.2 9.7 1 4853.4 101 1 48526 52 4857.7 9.2 __- 9.2 4/18/2008 8.2 1 4853.4 9.5 1 4853.E 9.8 1 4852.8 4.9 1 4858.0 8.9 -8.9 4/23/2008/ 8.2 1 4853.4 9.1 4854.0 7.8 I 4854.9 4.6 1 4858.3 8.1 -8.1 4/29/2008 7.8 1 4853.7 8.4 1 4854.6 6.7 1 4856.0 1 4.1 1 4858.8 6.9 -6.9 5/6/20081 7.5 L4854.0 78 i 48553 54 1 48572 3.4 i 48595 53 53 5/15/2008: 7.1 1 4854.4 6.8 1 4856.2 3.9 1 4858.7 1 2.9 1 4860.0 4.3 4.3 5/21/2008 6.6 - 4854.9 6.5 i 4856E 4.5 1 48581 2.7 1 4860 2 4.2 4 2 5/28/2008 6.0 1 4855.5 5.9 1 4857.1 3.5 1 4859.1 1.5 1 4861.4 2.7 -2.7 6/6/2008' 5.9 1 4855.6 IIEMOIIEThIEIMIMMIIIIIIIMIIIIIIIIMIMIIMCM2.8 -2.8 6/9/2008 6.0 1 4855.5 5.8 1 4857.2 3.6 1 4859.1 1 IIIIIIIIIIIIII.,.I III 2.8 -2.8 6/18/2008€ 5.9 1 4855.6 5.7 1 4857.4 3.4 ' 4859.2 IIIIIIMIIIIIIIIEMIEIM 2.8 -28 6/25/2008 5.8 1 4855.8 5.6 1 4857.5 3.3 1 4859.4 2.8 -2.8 7/1/2008 5.8 1 4855.8 5.5 1 4857.6 1 3.3 1 4859.3 IIIIIIIMIIIINI 1.3 1 4861.7 29 -2.9 7/11/20081 5.8 1 4855.7 5.5 1 4857.6 € 3.3 1 4859.3 3.0 -3.0 7/17/2008` 5.9 1 4855.6 5.4 1 4857.6 1 3.4 ' 4859.2 IIIIIIIMIIIINI 1.3 1 4861.6 3.1 -3.1 7/23/2008/ 6.0 1 4855.5 5.6 1 4857.5 [ 3.6 1 4859.1 1111111111111111 1.5 I 4861.4 3.2 -3.2 8/1/20081 6.2 1 4855.4 5.7 1 4857.4 i 3.6 ' 4859.1 allaillinal 1.4 1 4861.5 3.1 -3.1 8/13/2008 6.1 1 4855.4 5.6 1 4857.5 I 3.5 1 4859.1 1.3 1 4861.7 2.9 -29 8/20/20081 6.2 1 4855.4 5.7 1 4857.4 ; 3.5 ' 4859.1 IIIIIIIMIIIINI 1.3 1 4861.6 2.8 -2.8 8/26/2008' 6.3 1 4855.3 5.8 1 4857.3 3.7 1 4859.0INIIIMMION 1.4 I 4861.5 2.8 -28 9/3/20081 6.3 14855.2 5.8 1 4857.2 3.8 I 4858.8 1.4 1 4861.5 2.7 2.7 9/9/2008' 6.4 1 4855.1 6.0 1 4857.1 3.9 1 4858.7 1.5 1 4861.4 2.8 -2.8 9/18/20081 6.4 1 4855.1 6.1 1 4857.0 4.0 1 4858.6 1.5 1 4861.4 2.8 -2.8 9/24/2008 6.5 1 4855.0 6.2 1 4856.9 40 1 4858.6 1.4 1 4861.5 27 2.7 10/2/2008 6.7 1 4854.9 6.3 1 4856.7 1 4.2 1---4856 5 1.5 1 4861.4 2.8 2.8 10/10/2008 6.8 1 4854.8 6.6 1 4856.5 , 4.3 1 4858.4 1.5 ' 4861.4 2.8 -2.8 10/15/2008 6.8 1 4854.7 6.8 4856.2 4.3 4858.3 1.5 4861.4 2.8 2.8 ., 10/23/2008 69 1 4854.6 69 1 48561 44 1 48582 15 1 48614 28 28 10/27/20081 6.9 4854.6 7.3 4855 8 { 4.6 4858 1 ,,,,,,,,,,,,,,,, 1.6 4861.3 2.9 2.9 ......... ........ ................�. Y 11/5/2008` 7.1 4854.4 7.41 ........... 3............. 4855.E 5 1 . 4857 6 2.0 4860.9 3.5 3.5 11/13/2008 7.3 4854.3 7.5 4855.6 5.5 1 4857.1 2.2 4860.7 3.8 -3.8 11/20/2008 7.5 r 4854.0 7.8 4855.3 5.8 4856.8 2.3 Y 4860.7 4.0 4.0 11/25/20081 7.6 _4853.9 7.8 4855.2 1 61 : 4856 6 2 3 4860 6 3.9 3 9 12/3/2008/ 7.7 r 4853.9 .,...8.1 ,./. 4855.0 i .. 6.3 4856.3 2.5 r 4860.4 4.3 -4.3 17/9/2008€ 7.7 1 48539 81 48550 59 1 4856.7 2.5 48604 4.3 43 12/18/20081 6.8 �4854.7 8.1 '4855.0 ' 62 : 4856.5 2.7 '4860.2 ^m�4.3 -4.3 12/29/20081 8.0 / 4853.5 8.3 i 4854.7 6.8 I 4855.8 29 s 4860.0 4.8 -4.8 !1/7/20091 7.9 4853.E 8.2 ! 4854.9 6.9 4855.? 3.0 1/15/20091_8.0 4853.5 8.3 i 4854.8 , 7.1 1 4855.6 3.1 i 4859.8 4.8 -4.8 1/23/20091 7.9 8 r 453.6 8.2 1 48549 6.8 4855.9 2.9 4860.0 4.8 -4.8 � 1/27/20091 8.0 4853.5 8.3 4854.8 ' 6.6 1 4856.1 1111111111111111 3.0 1 4859.9 4.8 -4.8 2/4/20091 8.1 1 4853.4 8.3 1 4854.7 , 6.5 1 4856.1 111111111011111. 3.0 4859.9 4.8 -4.8 2/12/20091 8.1 4853.4 8.3 4854.8 € 6.3 1 4856.3 1111111111111111 3.1 i 4859.8 4.9 -4.9 2/16/20091 8.0 1.. 4853.5 8.2 I 4854.9 E 6.3 1 4856.4 111111111111111111 3.0 4859.9 4.8 -4.8 2/27/20091 8.1 4853.4 8.3 i 4854.8 6.3 ' 4856.4 11111111111111111 2.8 i 4860.1 4.7 -4.7 3/4/2009 8.2 l 4853.4 8.2 l 4854.9 , 6.2 1 4856.5 11111111.1111111 2.8 1 4860.1 4.8 -4.8 3/9/2009' 8.0 4853.5 8.2 i 4854.9 = 6.2 : 4856.5 3.2 i 4859.7 4.8 -4.8 3/19/20091 7.9 4853.6 8.2 4854.9 ' 61 1 4856.6 3.3 1 4859.6 47 4.7 3/24/2009 7.9 / 4853.6 8.3 1 4854.8 1 6.0 1 4856.6 3.4 1 4859.5 4.7 -4.7 4/2/2009 7.8 4853.7 8.3 4854.8 59 1 4856.7 3.5 4859.4 48 4.8 4/6/2009 7.8 1 4853.7 83 1 48547 1 58 148568 3.5 4859.4 48 __- 48 4/15/2009 6.6 4854.9 5.9 1 4856.7 3.2 . 4859.7 4.7 -4.7 4/21/2009/ 6.0 1 4855.5 5.3 1---4857.3 2.7 1 4860.2 4.3 -4.3 ., 4/29/2009 5.5 1 4856.0 i ' 4.2 1 4858.5 2.1 ' 4860.8 3.7 -3.7 5/5/2009€ 5.0 4856.5 4.2 4858.5 1.9 4861.0 3.7 3 7 5/11/2009= 4.8 1 4856.7 41 1 48586 19 1' 48610 37 37 5/19/20091 4.4 4857.1 ' 4 0 4858.E 1.8 4861.1 3.6 -3.6 5/27/2009 4.3 1 4857.2 3.5 1 4859.1 1.8 . 4861.1 3.5 -3.5 6/4/2009 4.3 1 4857.2 3.8 4858.8 aIIIIMIIIIIII 1.8 i 4861.2 3.4 -3.4 McGrane Water Engineering, LLC Page C-16 of C-20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Rankin Wells(3 of 6) Well ID:1 R7 R2 R3 R4 • R5 R6 ....................................................................................................................................................................................................................................:..............................a..................................................................'............................................................. Elevation! 4861.53 -- 4863.05 1 -- 486264 -- 1 4861.76 1 -- 1 4862.91 -- 0 - Date Sampled !Depth to 6W GW Depth to GW Depth to GW GW 1 Depth to 1 GW Depth to GW GW "I Depth to GW Elevation GW "I Elevation Elevation 1 GW 1 Elevation E • Elevation"I GW Elevation ........,. 6/10/20091 4.3 4857.3 3.8 48588 1 1 1.7 48612 33 -3.3 6/18/20091 4.2 4857.4 3.8 4858.9 1.6 4861.3 1 3.3 -3.3 6/23/20091 4.2 4857.4 3.7 4859.0 • 1.3 4861.6 "I 3.1 -3.1 .............................7/1/20091..............4:2.....................4857.4.......................................'.............................................3.6.....................4859.1 1 1 1 1.2 4861.7 1 2.8 -2.8 • 7/8/20091 3.8 4857.7 2.4 4860.2 1 0.7 4862.2 "I 2.2 -2.2 7/14/20091 4.0 4857.5 I 2.2 4860.5 1 0.7 4862.2 2.1 -2.1 7/21/20091 4.0 4857.5 2.3 4860.4 1 0.8 4862.1 "I 2.3 -2.3 • • 7/29/20091 3.9 4857.E 21 4860.E 1 0.8 48622 1 2.3 -2.3 8/4/20091 4.8 4856.7 • 33 4859.4 1 i 1 0.5 4862.4 1 2.1 -2.1 ..........................8/16/20091..............5:3.....................48563....... ..............36.....................4859,1 1 0.7 48622 23 -2.3 8/21/20091 5.6 4855.9 4.0 4858.6 1 i 0.8 4862.2 "I 25 -2.5 • ..........................8/28/20091...............5:8.....................48557....... ..............44.....................4858:z......2................................a...........................................:9.....................48628......."........._z:.........................:7.......... 8/31/20091 5.9 4855E 5.2 4857.5 1 .........I 1.0 48619 "I 2.9 -29 .............................9/2/20091 6,2 4855.4 1 1.0 4861.9 5.4 ......4857.2 1 L9 -29 ..........F 1.1 ..........4861.8.. .........._L9......................-2.9........ 9/9/20091 6.3 4855.2 5.8 4856.9 1 9/14/20091 6.6 4854.9 6.0 4856.6 1 [ 1.2 4861.7 3.0 -3.0 • 9/23/20091 6.8 4854.7 6.4 4856.2 j 1.2 4861.7 1 3.1 -3.1 9/29/20091 7.0 4854.5 6.6 4856.7 1 € 1.3 4861.7 1 2 -3.2 •10/5/20091 7.3 4854.2 6.7 4856.0 1 1.3 4861.7 3.3 -3.3 10/13/20091 7.5 4854.0 6.8 4855.8 1 i 1 1.3 4861.7 1 3.3 -33 10/19/20091 7.6 4853.9 7.0 4855.6 1 1.3 4861.6 34 -3.4 10/27/20091 7.6 4853.9 7.3 4855.4 1 1 1.4 4861.5 1 3.6 -3.6 ....._........_.......11/3/20091....._. 7,6 4853.9 7.5 ...._4855:1.,_......_._._.__......M.._...___.._.....t................:6.....................48613........1...........3:9._....._...._......3:9.._..... 11/11/20091 7.7 4853.9 7.8 4854.9 1.8 4861.1 4.3 -4.3 11/19/20091 7.8 4853.7 7.9 4854.7 1 1 1 2,1 4860.8 4.5 -4.5 11/23/20091 7.9 4853.E 8.1 4854.6 2.4 4860.5 4.9 -4.9 12/3/20091 8.1 4853.4 8.3 4854.4 1 :2.7 4860.2 5.3 -53 _... .................. ,...... ................. mm 12/8/20091 8.2 4853.4 8.4 4854.2 1 z8._.... 4860.1 5.4 -5.4 12/16/20091 8.3 4853.3 • 8.5 4854.1 1 I 2.9 4860.0 "I 5.6 -5.6 • 12/21/20091 8.3 48532 e.6 4654.1 1 3.1 4859.8 1 5.8 -5.8 1/6/20101 8.4 4853.1 • 8.5 4854.1 1 i 1 3.0 4859.9 "I 5.8 -5.8 ........................../12/20101............._8:3.....................48533........ ..............86.............,.......4854.1 1 1 3 3.0 4859.9 5.8 -5.8 2/10/20101 8.3 4853.2 8.7 4854.0 1 i i 3.1 4859.8 "I 5.9 -5.9 ..........................3/17/2010.t..............8:5.....................48530 • ....... ..............88 4853.8 1 6.1 4856.8 6.3 -6.3 ........,. 4/6/20101 8.3 .,...4853 2...,... 8 3 .....4854.3 5.8 48571 ....6 3 6 3 5/19/20101 8.1 4853.4 7.8 4854.8 1 I € 5.6 4857.3 "I 5.8 -5.8 6/22/20101 7.5 4854.0 • 7.6 4855.1 5.3 4857.7 1 5.4 -5.4 7/14/20101 7.7 4853.9 7.5 4855.1 1 5.3 4857.7 "I 5.6 -5.6 • 8/18/20101 7.8 4853.7 7.7 4855.0 1 j 5.4 4857.5 I 5.6 -5.6 9/14/20101 8.3 48533 7.9 4854.7 1 1 ( 5.6 4857 1 5.7 -5.7 • 10/20/20101 e.6 4852.98.3 4854.3 1 • 1 5.8 485].1 1 62 -6.2 11/17/20101 8.9 4852.E 8.7 4854.0 1 6.2 4856.7 • 6.4 -6.4 .......................12/15/20101 6.7 ......48529....... ..............9:.....................4853:6.......1....................._....7......_._...._.......2...............5:7.....................48572................._6:.......................-60......... 1/19/20111 9.2 4852.4 8.7 4854.0 1 5.8 4857.1 6.3 -6.3 2/16/20111 8.9 4852.E 8.9 4853.7 1 1 5.2 4857.7 5.5 -5.5 .... 3/22/20111 8.8 .4852.7... 91 .....4853.E - .....i 4.9 ..... 4858 0 ...........51.........................5.�.................4/13/20111 8.8 4852.8 9.3 4853.3 1 • I 3.5 4859.4 1 4.5 -4.5 5/18/20111 8.9 4852.E 9.6 4853.1 1 3.0 4859.9 1 4.1 -4.1 • 9.8 4852.9 1 1 2.3 4860.6 1 3.9 -3.9 6/27/2011 9.1 4853.E 1 22 mm4860.7 1 3.6 -3.8 • 7/5/20111 9.0 4853.6 1 1 2.1 4860.8 1 3.6 -3.6 7/14/20111 9.0 4853.E 1 1.8 4861.2 33 -3.3 7/18/20111 .• 8.9 4853.7 1 I 1.7 4861.2 "I 3.2 -3.2 8/3/20111 8.3 4853.2 8.2 4854.9 8.8 4853.9 1 i 1.5 4861.4 3.0 -3.0 8/10/20111 82 48534 7.8 "I 48553 67 4854.0 1 i i h 1.4 48615 "I 2.8 2.8 ..,,,,,..8/18/20111 84 4853.1 6.3 "I 4854.E 9.1 4853.E 1 1 1 1.6 4861.3 "I 3.1 -3.1 8/24/20111 8.8 4852.7 8.5 1 4854.6 9.5 4853.1 1 1.8 4861 1 3.3 -33 8/30/20111 88 4852.8 8.5 1 4854.E 9.5 4853.1 1 j 1.8 4861.2 "I 3.2 -3.2 9/7/20111 9.1 4852.4 9.2 1 4853.9 9.4 4853.2 1 1.7 4861.2 I 3.1 -3.1 9/16/20111 9.6 4851.9 9.5 "I 4853.E 10.1 4852.6 1 i [ 1.6 4867.3 "I 2.9 -2.9 ........,. 9/20/20111 9.8 ...48518 9.9 1 48531......., 99 48527 1. 1.5 48614 1.......3.0 3.0 9/28/20111 10.1 4851.4 10.1 "I 4853.0 9.8 4852.8 1 ( 1.6 4861.3 1 3.1 -3.1 10/7/20111 10.6 4850.9 13.5 1 4849.6 9.7 4853.0 1 1 1.6 4661.3 3.3 -3.3 10/11/20111 10.8 4850.7 15.6 4847.5 8.9 4853.7 I i 1.4 4861.5 2.8 -2.8 10/20/20111 11.3 48503 17.8 48453 8.8 4853.8 1 1 i 1.7 4861.2 "I 29 -L9 10/26/20111 11.4 4850.1 17.8 4845.2 9.2 4853.5 1 ( 1.9 4861.0 3.3 -33 11/14/20111 11.5 4850.0 17.8 "I 4845.3 9.6 4853.1 1 1 1.8 4861.1 "I 3.7 -3.7 • ........,. 11/10/20111 11.6 -..4849.9 178 . 48452 10.1 4852,6 , .........E 2.0 48609 ........40 4.0 ................ 11/17/20111 11.E 4849.9 18.0 4845.1 10.1 4852.E 1 j LS 4860.4 4.8 -4.8 • • 11/23/20111 11.5 4850.0 18.3 1 4844.8 10.7 4852.0 1 • 2.9 ' 4860.0 I 5.3 -5.3 12/1/20111 11.4 ' 4850.1 184-.......1 4844.6 11.4 4851.2 ' 3.2 4859.7 1 5.7 -5.7 ........,. 12/8/20111 11.4 ...48501 18.6 1 4844.5 11.7 4851.0 ......... 3.3.....,...., 4859 6 .......5 8 -5.8 .............. ........,. 12/14/2011. 11.3 , 4850.2 18.7 1 4844.4 11.9 4850.7 ......... 3.6 4859.3 1 6.0 -6.0 12/20/20111 11.4 : 4850.1 18.8 ' 4844.3 11.9 4850.7 1 3.6 4859.3 6.2 -62 12/29/20111 11.4 : 4850.1 18.8 4844.2 12.0 4850.6 1 3.7 4859.2 "I 6.4 -6.4 1/5/20121 11.5 ' 4850,0 19.0 4844.1 12.1 4850.6 1 3.7 4859.2 1 6.8 -6.8 McGrane Water Engineering, LLC Page C-17 of C-20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Rankin Wells(4 of 6) Well ID: Elevation 4861.53 -- 4863.05 -- I 4862.64 1 -- 4861.76 I -- 1 4862.91 -- I 0 Date Sampled Depth to GW GW I Depth to GW �Depth to GW I GW Depth to • GW Depth to GW 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I 11/29/201 4849.6 1 18.8 48442 11.7ttt;--4851.0 2 4849.3 190 48441 € 123 48503• _ -- __-_- 4.0 23 • 12/6/2012 1 4849.2 i 19.1 - 4844.0 ` 12.7 1 4850.0 4.5 4858.4 7.3 1 -7.3 12/12/2012 124 4849.1 19.3 4843.8 i 129 4849.7 4.8 4858.2 76 -7.6 12/18/2012 12.5 4849.0 i 19.4 4843.E 13.3 4849.4 4.9 4858.0 7.9 1 -7.9 12/27/2012 12.3 4849.2 i 19.E 4843.5 ` 13.3 I 4849.3 5.1 4857.8 81 8.1 1/3/2013 124 • 4849.1 19.7 • 4843.4 13.5 I 4849.1 I 1 5.3 : 4857.6 111211MMIN 1/11/2013 125 4849.0 ' 19.8 4843.2 € 13.7 I 4849.0 5.5 4857.4 1 8.8 1 -8.8 1/17/2013 126 4848.9 1 19.5 4843.6 1 13.1 1 4849.6 I 5.6 I 4857.3 MIMI= 1/22/2013E1W 4848.9 I 19.5 4843.6 _ 13.1 i 4849E 5.6 1/30/2013 4848.7 - 194 48436 it 12.8.�.m.x.._4849,8IIlIIIIIIlIIIIII*IIIW • 48572.T„ 84 84 2/6/2013 4848E 19.5 4843.6 i 127 4850.0 4857.2 8.3 8.3 ..,,..,,2/12/2013 12 8 .4848.7 ( 19.4 4843.6 l.. 12.5 4850.1 .,,5.5..,,. 4857.4 8.3 8.3 2/21/2013 129 4848.6 19.3 4843.7 i 12.5 : 4850.1 5.5 4857.4 8.3 8.3 .2/27/2013 13 0 .4848.5 19.3 4843.7 I 12.3 : 4850.3 5.6 4857.3 8.3 8.3 3/4/2013 12.9 4848.6 ° 19.4 4843.6 i 12.3 € 4850.4 5.6 4857.3 8.3 i -8.3 3/13/2013 129 4848.6MEM_ 4843.6 : 12.2 1 4850.5 5.5 4857.4 3/22/2013 4848.E I 19.4 4843.6 € 12.1 i 4850.E if 1 5.6 3/26/2013 4848.7 19.4 48436__- 120 4850.611®�®®� 48574mm _ 4/2/2013 4848.E .19.5 48436 i 11.9 4850.7 4857.3 7.9 -7.9 ..,,..,,.4/12/2013 12 8 • 4848.7 € 19.5 4843.6 11.8 4850.8 5.5 4857.4 7.8 -7.8 4/17/2013 12.6 4848.9 19.3 4843.8 I 11.8 I 4850.9 5.4 4857.5 7.7 1 -7.7 ..,,..,,.4/25/2013 12 3 • 4849.2 1 19.1 • 4844.0 1 11.8 4850.8 .,,5.2..... 4857.7 7.8 -7.8 5/1/2013 12.1 4849.4 18.8 4844.2 [ 11.9 : 4850.7 5.1 4857.8 7.9 -7.9 5/9/2013 12.0 • 4849.5 I 18.7 : 4844.4 . 11.8 4850.8 5.0 4857.9 8.1 -8.1 5/14/2013 11 8 4849.7 €18.8 4844 3 11.8 4850.9 1 4.8 48581 5/22/2013 • 4849.8 18.7- •- 48444 11.9 48507_ 48582 € 83 - 8.3 5/30/2013 4850.2 i 183 48447 5 121 . 48506 48586 86 8.6 6/7/2013 11.2 4850.4 18.2 48449 12.4 485025 4.2 4858.7 1 9.3 -9.3 6/14/2013 10.8 4850.8 17.9 4845.1 1 12.9 I 4849.7 4.0 4858.9 1 10.0 1 -10.0 • 6/19/2013 10.8 • 4850.8 _ 17.8 • 4845.3 13.1 4849.E • I 41 : 4858.8 1 10.5 I -10.5 McGrane Water Engineering, LLC Page C-1 8 of C 20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Rankin Wells(5 of 6) Well ID: R1 R2 1 R3 R4 • RS R6 Elevation 4861.53 -- 4863.05 4862.64 4861.76 -- 4862.91 0 Date Sampled Depth GW GW Depth to GW -Depth to GW1 GW Depth to GW !Depth to GW GW Depth t GW Elevation GW Elevation' Elevation GW Elevation Elevation I GW I Elevation 6/25/2013 10.6 4850.9 17.5 1 4845.6 I 13.3 ' 4849.4 4.1 4858.8 1 10.6 -10.6 7/3/2013 10.4 4851.1 17.4 4845.E L. 13.3 i 4849.3 4.2 4858.7 10.8 -10.8 7/11/2013 10.1 4851.4 17.5 1 4845.6 = 13.4 ! 4849.2 4.1 4858.8 1 10.8 1 -108 7/15/2013 9 9 4851.6 17 3 4845.8 I 13.6 1 4849.1 - ---- 4.0 4858.9 11.1 1 11.1 �....m..:........._. 7/23/2013 9.8 4851.7 17.3 I 4845.8 13.8 : 4848.9 4.1 4858.8 I 10.8 I -10.8_.. 7/30/2013 9.9 4851.6 17.3 1 4845.7 E 13.8 i 4848.8Wal 4.2 4858.7 1 11.0 -11.0 8/8/2013 10.0 4851.5 17.4 1 4845.6 4.1 4858.8 1 11.1 I -11.1 8/14/2013 9.9 4851.6 17.3 . 4845.7 13.7 4849.0WM/ 4.3 4858.7 . 11.3 -11.3 8/22/2013 10.0 4851.5 17.4 1 4845.EIIIEEMIEMIMIIIN 4.2 4858.7 1 11.2 I -11.2 ..,..-8/27/2013 101 4851.4 17.5 j 4845E [ 140 4848E 4.3 4858.7 112 - 11.2 9/3/2013 10.0 4851.5 17.4 1 4845.6 I 14.2 1 4848.5 4.3 4858.E 1 11.3 -11.3 9/11/2013 9.9 4851.E 17.3 4845.7 14.3 48484 4.3 4858.7 . 11.3 -11.3 9/20/2013 _--9/27/2013 6.6 4854.9 7.0 4856.1 `: 9.0 1 4853.E € --- 7.6 -7.6 10/3/2013 6.74854.9 7.1 4856.09.1...._..p.._4853.6 _. _. 7.7 I -7.7 10/8/2013 6.8 _-_. i 77 77__.- 10/16/2013 6.8 4854.7 7.2 1 4855.9 9.3 1 4853.4 7.6 1 -7.6 10/23/2013 6.9 4854.6 7.0 . 4856.1 MEEMEM01 7.7 -7.7 10/29/2013 6.8 4854.7 7.0 1 4856.1 9.3 1 4853.3 7.8 1 -7.8 11/4/2013 6.9 4854.6 7.1 I 4856.0 9.5 4853.1 I 7.9 I -7.9 11/13/2013 7.1 4854.4 7.3 1 4855.8 9.5 1 4853.1 1 7.9 1 -7.9 11/19/2013 7.0 4854.5 7.2 4855.9 9.6 I 4853.1 � 8.0 -8.0 11/27/2013 71 4854.4 7.3 1 4855.8 9.7 4853.0 1 81 8.1 -.- 12/4/2013 7.1 •Z If 8.1 :....-8.1 12/12/2013 7.1 5MIZE 9.8 1 4852.9 82 i -8.2 12/18/2013 7.2 •. EMENEMENEMINEMIThall _-_-. 8.3 . -8.3 12/23/2013 7.2 4854.4 7.4 1 4855.E 9.7 1 4853.0 8.4 1 -8.4 1/2/2014 7.4 4854.1 7.6 I 4855.5 9.8 4852.8 I 8.3 I -8.3 1/7/2014 7.5 1 4855.6 10.1 1 4852.E 1 8.4 I -8.4 1/15/2014 8.0 4853.5 8.1 I 4855.0 10.6 4852.1 I 8.5 I -8.5 1/22/2014 8.3 4853.2 8.8 1 4854.3 11.1 1 4851.E 1 8.3 1 -8.3 ..,,..,,-1/28/2014 8.5 4853.0 9.1 4854.0 , 115 I 48511 84 - 8.4 2/5/2014 88 4852.8 9.6 4853.5 11.8 1 48509 86 8.6 2/12/2014 8.9 4852.6 10.0 4853.1 1 11.6 1 4851.1 8.4 I -8.4 2/21/2014 9.1 4852.4 10.3 1 4852.7 11.7 1 4851.0 8.4 i -8.4 2/25/2014 9.2 : ralliall _-_-. _-_-. 8.5 ` -8.5 3/4/2014 9.3 4852.3 11.7 1 4851.4 [ 11.8 1 4850.9 8.4 -8.4 3/13/2014 9.3 4852.2 12.2 I 4850.9 [ 11.7 4851.0 I 8.3 I -8.3 3/19/2014 9.4 4852.1 12.3 1 4850.7 ' 11.8 1 4850.9 1 84 8.4 3/27/2014 9.5 4852.0 12.7 4850.4 11.8 4850.8 8.5 -8.5 4/2/2014 9.4 4852.1 12.8 i 48503 I 11.8 1 4850.9 1 83 8.3 4/8/2014 9.3 4852.2 12.8 4850.3 118 48508 83 - 8.3 4/17/2014 94 4852.1 128 4850.2 -__ 11.8 1 4850.9 _.. i 81 81 4/22/2014 9.3 4852.2 128 4850.2 11.7 1 4851.0 7.9 -7.9 5/1/2014 9.3 4852.3 12.8 I 4850.3 11.8 : 4850.9 7.8 -7.8 • 5/8/2014 9.3 4852.2 12.7 i 4850.4 11.7 I 4851.0 7.6 i -7.6 5/14/2014 9.4 4852.1 12.8 4850.3 11.E 1 4851.1 7.4 I -7.4 5/22/2014 12.E i 4850.5 11.6 • 4851.1 73 I 7.3 5/27/2014 9.6 4851.9 12.7 - 4850.4 € 11.7 1 4851.0 1 7.2 • 7.2 6/4/2014 9.5 4852.0 12.8 4850.3 I 11.8 i 4850 9 1 7.0 1 7.0 6/10/2014 9.4 4852.1 12.7 48504 : 11.8 1 48508 6.9 -6.9 6/19/2014 9.3 4852.2 12.E 4850.5 ` 11.8 I 4850.9 1 I 6.7 -6.7 6/24/2014 9.3 4852.3 12.7 r48504 c 11.7 1 4851.0 i 6.6 -6.6 7/3/2014 9.3 MallaraMEZMINIMEMMIONIE _-_-. 6.5 _-. -6.5_. 7/9/2014 9.4 4852.1 12.8 48502 • 11.7 1 4851.0 6.4 i -6.4 7/16/2014 9.3 4852.3 12.9 i 4850.1 11.8 1 4850.9WMA 6.5 -6.5 7/23/2014 9.3 4852.2 13.0 4850.1 11.7 1 4851.0 6.6 i -6.6 7/29/2014 9.3 4852.3 13.1 i 4850.0 11.E 4851.1 6.5 -6.5 0. 8/5/2014 9.2 4852.4 13.2 ; 4849.9 11.5 1 4851.1 i 6.4 i -6.4 8/14/2014 9.1 • 4852.4 13.3 4849.8 11.4 I 4851.2 6.3 -6.3 9/10/2014 9.1 4852.4 11.7 1 4851.0 1 6.5 1 -6.5 • 10/16/2014 9.0 4852.5 11.E i 4851.1 6.4 -6.4 11/12/2014 9.5 4852.0 11.9 1 4850.7 7.0 -7.0 12/12/2014 98 Millalll 7.2 -7.2 1/22/2015 9.8 4851.8 12.E 1 4850.1 7.3 -7.3 • • 2/18/2015 9.5 4852.0 12.4 4850.2 7.2 -7.2 3/17/2015 12.7 1 4850.0 7.3 -7.3 •..,,..,,.., • 4/8/2015 12.3 3 6.8 6.8 5/20/2015 8.0 4853.5 11.0 1 4851.E 5.6 5.6 • • 6/17/2015 7.6 4853.9 10.3 I 4852.4 5.5 -5.5 7/7/2015 7.5 4854.0 10.1 1 4852.E 1 5.6 1 -5.6 • • 8/19/2015 7.3 4854.3 10.3 4852.3 _- 5.6 -5.6 9/15/2015 [ 10.5 I 4852.1 6.2 -6.2 10/13/2015 II III II IIIII III 6.8 -6.8.. 11/17/2015 III III III III 7.4 ; -7.4 12/16/2015 IIIIIIIIIIIIIIIIMMIIIIIIIIIIII 11.7 1 4851.0 7.8 -7.8 McGrane Water Engineering, LLC Page C-19 of C-20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com Rankin Wells(6 of 6) Well ID: Elevation 4861.53 4863.05 i -- 4862.64 -- 4861.76 MEM 4862.91 -- 0 MEM Date Sampled Depth to GW GW Depth to i GW Depth to GW GW Depth to GW i Depth to GW GW Depth to GW Elevation GW i Elevation Elevation GW Elevation i Elevation i GW Elevation 1/9/20161= 11.9 • 4850.7 2./17/2016 i 11.8 4850.9 3/3/2016 allafillial I. 12'4 4850.2 allIMMINIMMIMINIIIMIENIIMM 4/13/2016 111111111111 l 12.5 4850.1 5/10/201611111111111=111111 12.7 4850.0 6/23/2016 12.5 4850.1 IIIIIIIIIMINIIIIIMIllairalaliall 7/19/2016 8/24/2016 111111111111111111111111111111 i 12.8 4849.9 allaliallaillaanialiallialliall 9/20/2016 12.4 4850.2 10/8/2016 1111111111111 12.5 4850.1 immimmimm 11/16/2016 12/13/2016==M 13.0 4849.E 111111111111111111111111111 . M 1/17/2017 111111IMIIIIIIIIIIIII 13.1 4849.E allaliallifillaillil 2/15/2017 IIIIIIIIIMIIIIIIIMIIIIIIMIIIIIIIIIIIEIIIHICMIMIIIIIIIIIIIIIIIIIIMIIIIIIIIIIMIIIIIIIIIMIIIIIIIIIIIIIIII 4/27/2018 MEM 4843.4 11111111111111111111111.11111.1111111111111.1111111111011111111111111111111111 5/16/2018 6/12/2018 NM 4843.0 7/18/2018 MIZIMEMIIIIIIMIIIIIIMIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIMIIIIIIIIIIIIIIIIIIII 8/8/2018 laiaNlariaarlaaMlallaalIllIllaalaaallaIIIIIMIMMIIIIIIMIIII 9/20/2018 10/16/2018 17.9 ICITIIIIIIIIIIMIIIIIIIIIIIIIIIIIIIIIIIIIIIIINIIIIIMIIIIIIIIIIIIIIIMIIIIIIIIIIIIII 11/2/2°18 12/11/2018 18.0 4843.5 .111.1111111111111111111111111111111111111111111111111 1/15/2019 *All data extracted from 'NCCI Pit No 1 Monitoring Well Reading Update 1-17-19.xls'; elevation data was extracted from USGS 10m DEM. McGrane Water Engineering, LLC Page C 20 of C-20 1669 Apple Valley Rd. • Lyons, CO 80540 • Phone: (303) 917-1247 E-Mail: dennis@mcgranewater.com Web: http://www.mcgranewaterengineering.com EXHIBIT H Wildlife Information The project area was surveyed for general wildlife habitat by Ecological Resource Consultants (ERC). The Screening Report for Federal and State Listed Threatened and Endangered Species from ERC is attached which describes the wildlife habitat present on the site and the common species that may be found in the habitat area. ERC has conducted this screening for federal and state listed threatened and endangered species and general wildlife for the approximately 67-acre survey area. The following provides a summary of items identified as part of this report and recommendations from ERC: 1. Four (4) primary land use class/vegetation cover types exist within the survey area. Habitat within the survey area is characterized as Great Plains Saltgrass Saline Wet Meadow (4%), Weedy Forbs Great Plains Ruderal Forbland (87%), Disturbed (7.5%), and Water (1.5%). Historic land uses associated with oil and gas activities and farming practices followed by vacancy have led to degradation of the native vegetation community. 2. Generally, there are features within the northwest portion of the survey area and the surrounding properties that provide general habitat for migratory birds, raptors, amphibians, fish, and small to large-sized mammals. However, habitat within the survey area is somewhat degraded and of lower ecological value from a wildlife perspective due to historic and current land use of the survey area and surrounding properties, which has restricted overall growth and establishment of native vegetation. 3. Non-raptor birds: No active non-raptor bird nests were observed within the survey area. A nest survey should be completed no more than 7-10 days prior to vegetation or debris removal to ensure that active nests are not disturbed and that no new nests have become established within the survey area. Non-eagle Raptors: No non-eagle raptor nests were observed nor are any CPW mapped non-eagle raptor nest protection zones located within the survey area (CPW 2024a). Nest activity status can vary seasonally and from year-to-year. Future land use changes may require additional nest surveys (generally between February 1 and September 15 (CPW 2020)) to determine activity status within '/4 to % mile of the survey area to ensure compliance with CPW recommendations. Eagles: No eagle nests were observed nor are any CPW mapped eagle nests located within the survey area (CPW 2024a). However, nest activity status can vary seasonally and from year-to-year. Future land use changes may require additional nest surveys (generally between December 1 and July 31 (CPW 2020)) to determine activity status within '%to '/z mile of the survey area to ensure compliance with CPW recommendations. 4. No federally listed threatened and endangered species and/or habitat protected under the ESA were identified within the survey area. The survey area is not within designated critical habitat of any federally listed species. Preble's meadow jumping mouse and Lite ladies'-tresses are both considered to have a LOW potential to occur due to potentially suitable habitat in the northwest portion of the survey area. Should any future land use changes occur in the northwest portion of the survey area, a ULT and PMJM survey • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application should be completed to verify the presence/absence of individual species and to avoid potential adverse impacts. 5. No State listed threatened or endangered species and/or habitat protected by CPW under Colorado Statute Title 33 were identified within the survey area. Burrowing owls are considered to have MEDIUM potential to occur due to a prairie dog colony occupying a large portion of the survey area. Prior to any future land use changes, a burrowing owl survey should be conducted during the nesting season, March 15 through August 31, to verify the presence/absence of burrowing owls. Any anticipated construction should take place outside of the burrowing owl nesting season. 6. CPW-designated terrestrial HPH, Mule Deer Migration Corridor, is present in the northeast portion of the survey area. Per CPW recommendations, the mule deer migration corridor has an imposed time limitation (TL) that prohibits any permitted or authorized human activities between December 1 and April 30 (CPW 2023). Therefore, any future land use changes should occur outside of the CPW-listed TL. Attached is ERC's Screening Report for Federal and State Listed Threatened and Endangered Species. Northern Colorado Constructors, Inc. la'Consulting,Inc. NCCI Pit#1 DRMS 112 Permit Amendment Application Ecological®cal Resource Consultants, LLC 2820 Wilderness Place,Suite A I Boulder,CO 180301 I (303)679-4820 SCREENING REPORT FOR FEDERAL AND STATE-LISTED THREATENED AND ENDANGERED SPECIES AND GENERAL WILDLIFE FOR NCCI PIT #1 EXPANSION AREA WELD COUNTY, COLORADO MAY 30, 2025 Prepared For: J&T Consulting, Inc. Contact:JC York, P.E. Phone: (303)857-6222 Email:jcyork@j-tconsulting.com ERC Project#420-2501 1 ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report Threatened and Endangered Species and General Wildlife NCCI Pit#1 Expansion Area Weld County,Colorado May 30, 2025 Contents 1.0 INTRODUCTION 1 2.0 GENERAL SURVEY AREA DESCRIPTION 1 3.0 SCREENING METHODOLOGY 6 4.0 GENERAL WILDLIFE HABITAT(NON-REGULATED) 6 5.0 MIGRATORY BIRD TREATY ACT 7 6.0 SPECIES PROTECTED UNDER THE ENDANGERED SPECIES ACT OF 1973 9 UTE LADIES'-TRESSES (SPIRANTHES DILUVIALIS) 10 PREBLE'S MEADOW JUMPING MOUSE (ZAPUS HUDSONIUS PREBLEI) 10 7.0 STATE THREATENED AND ENDANGERED SPECIES 11 BLACK-FOOTED FERRET(MUSTELA NIGRIPES) 13 BURROWING OWL(ATHENE CUNICULARIA) 13 8.0 HIGH PRIORITY HABITAT AREAS 14 9.0 SUMMARY AND RECOMMENDATIONS 17 10.0 REFERENCES 19 FIGURES FIGURE 1— LOCATION AND USGS TOPOGRAPHIC MAP FIGURE 2—VEGETATION COMMUNITIES MAP FIGURE 3— PRAIRIE DOG COLONY MAP FIGURE 4—CPW DESIGNATED HIGH PRIORITY HABITAT AREAS APPENDIX A- USFWS IPAC SPECIES LIST 2 .> ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report 1.0 INTRODUCTION Ecological Resource Consultants, LLC(ERC) has prepared this report at the request of J&T Consulting, Inc. The approximately 67-acre property is located in Fort Lupton, CO (herein referred to as survey area) and consists of oil and gas facilities and vacant land, formerly used for agricultural purposes. This report specifically documents and identifies potential federal and state-listed threatened and endangered (T&E) species and/or habitat that could exist on or immediately surrounding the survey area. In addition, this report also provides a cursory screening of general wildlife use characteristics and existing vegetation community types.This report has been prepared in accordance with the Migratory Bird Treaty Act(MBTA), Endangered Species Act(ESA),Colorado Parks and Wildlife(CPW)Colorado Statute Title 33,and Rule 6.4.8 of the Construction Materials Rules of the Colorado Mined Land Reclamation Board Exhibit H - Wildlife Information. This report provides documentation of findings related to federally and state-listed threatened and endangered species and may serve as a resource for permitting or review by the USFWS and/or CPW. 2.0 GENERAL SURVEY AREA DESCRIPTION State/County Colorado/Weld County Parcel#s 131124003001 Nearest Town Fort Lupton Property Size(ac) 67 Elevation (ft) 4,856 Street Address/ 0.6 mile north of the intersection of CR 25 and CR 18 Nearest Intersection Latitude, Longitude 40.128299° N, -104.833465°W (Center of survey area) Section/Township/ Section 24,Township 2 North, Range 67 West Range Watershed HUC Mose Davis Lake-South Platte River-101900030603 General Directions from The survey area can be accessed from the intersection of CR 25 and CR 18 Nearest Intersection by turning north on CR 25 and, after 0.6 mile, taking a left onto the dirt mining access road that runs along the south boundary of the survey area Survey Area Vegetation Weedy Forbs Great Plains Ruderal Forbland; Great Plains Saltgrass Saline Communities Wet Meadow; Disturbed; Water 1 ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report Weedy Forbs Great Plains Ruderal Forbland Stands occur on a variety of open disturbed habitats, including pastures, ditches, bottomlands, and waste areas. The vegetation is dominated by medium-tall (0.5-1 m)forbs. In semi-arid and arid regions, sites tend to be relatively mesic. Native species are generally less than 10% cover. Native species may include mixed-grass prairie grasses. In semi-arid and arid regions, sites tend to be relatively mesic and include many mesic species such as Carex utriculata and Juncus arcticus ssp. littoralis (= Juncus balticus). Other introduced species include Bromus inermis, Phalaris arundinacea, Rumex crispus, Thlaspi arvense, and Verbascum thapsus. Great Plains Saltgrass Saline Wet Meadow Vegetation Community This alliance occurs throughout the Great Plains where saline soils create Description(s) conditions suitable for it. Dominant vegetation is a mixture of short and mid grasses and can have moderately sparse to dense cover. Vegetation height and cover and species diversity tend to vary inversely with salinity. Saltgrass (Distichlis spicata) is the most abundant species in stands across the range of this alliance. Widely scattered low shrubs, such as kochia (Bassia scoparia), can be present. Trees are not found. Disturbed These areas are defined by some form of human alteration or management, including barren grounds associated with oil and gas related activities, closely cropped vegetation such as lawns and landscaping, and urban materials such as buildings and pavement. Tree canopy varies from 0 to 50% (e.g., open to shaded lawns and gardens). Meadow Island Ditch Number 1, unnamed creek in the northwest portion Notable features of the survey area Refer to Figure 1 for a vicinity and U.S. Geological Survey (USGS) topographic map of the survey area and Figure 2 for vegetation communities. Refer to Photos 1-6 below for general characteristics of the survey area 2 AERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report s I 1� LEGEND ' \ i-\ ElSurvey Area 0 0 (\\*) N)\ Approximate Location -\ 4 .. T o ___ L� 18 -N\ * �' i34 •a.C_�� --so n llm B6'6 , :.'', :52 4854 \44_*V r ; o• �`` \ ) ( • 110 • a. r 0 �� r Q G :` 19 N? , .. . g. •o - /-.a8so • + `V o ,304k. , lir cco r%c !.., \ ,,..._•, . Illik„,...... ) , Fort Collins Greeley • O _ ' Lon oot f R 6 gy m E,;uld ; )Sa , iLL 4924 . k• S. \,_ iphon .ice pv. rSaPhon ® 0 s •� o ...--7 -Ni ''l Prepared By: N FIGURE 1 Q t A ERC USGS TOPOGRAPHIC AND LOCATION MAP 2820 Wilderness Place,Suite A 0 500 1,000 2,000 Boulder,C080301 NCCI PIT#1 EXPANSION AREA Feet (303)679-4820 WELD COUNTY, COLORADO ERC#:420-2501 3 .0 NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report tiwik .44 ALE LEGEND Survey Area 46, Weedy Forbs Great Plains Ruderal Forbland Great Plains Saltgrass --- • Saline Wet Meadow tt, s - - r Disturbed Water Prepared By: N FIGURE 2 iet ERC VEGETATION COMMUNITIES 2820 Wilderness Place,Suite A Boulder,CO 80301 NCCI PIT#1 EXPANSION AREA o 300 600 (303)679-4820 WELD COUNTY, COLORADO Feet ERC#:420-2501 4 'l NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report Refer to Photos 1-6 below for typical characteristics within the survey area. Ill7 ...-:--- - j2: I Photo 1. Overview facing northeast from the center of the Photo 2.View facing west from the eastern boundary,showing a survey area, showing the Great Plains Ruderal Forbland, concrete-lined irrigation ditch and dirt road bisecting the survey dominated by field bindweed(Convolvulus arvensis). area. °It _Lic;.; Photo 3.View facing northwest in the central portion of the Photo 4.View west from the southeast corner of the southern survey area,showing'Disturbed'community. portion of the survey area,characterized by upland fields. a • �.x r• 1-,t m I a* I ,i 4� � ,. 4 d Akteiti,-.:;1,-'7„, Photo 5. View facing southeast showing the low-lying Photo 6. View facing south (upstream) of the irrigation ditch, wetland area in the northwest portion of the survey area, Meadow Island Ditch Number 1, located across the northeast comprised of Great Plains Saltgrass Saline Wet Meadow. portion of the survey area. 5 A ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report 3.0 SCREENING METHODOLOGY ERC conducted a literature review as part of initial data collection for preparation of this report. ERC reviewed available literature sources including: CPW information and the US Fish and Wildlife Service (USFWS) Federal Register. A field inspection was subsequently conducted on May 15, 2025 to identify and document the presence of natural vegetation communities, general wildlife use, and potential for threatened and endangered species presence/habitat. Upon review of all available resources, including literature and field inspections, ERC provides the following determination for the survey area. 4.0 GENERAL WILDLIFE HABITAT (NON-REGULATED) Wildlife utilizes the general landscape in a multitude of ways and uses a variety of habitats as areas of permanent inhabitance, seasonal inhabitance, breeding grounds, foraging purposes, or as temporary shelter. Potential wildlife habitat includes the entire survey area. Historic agricultural practices as well as oil and gas activities have altered the native habitat for wildlife, and the survey area is considered degraded landscape,which limits the overall quality of potential wildlife habitat. As discussed in Section 2.0, four habitat types were observed within the survey area and are characterized as Great Plains Saltgrass Saline Wet Meadow (4%), Weedy Forbs Great Plains Ruderal Forbland (87%), Disturbed (7.5%), and Water(1.5%) The Weedy Forbs Great Plains Ruderal Forbland community is dominated by invasive species including cheatgrass (Bromus tectorum), kochia (Bassia scoparia), Scotch cottonthistle (Onopordum acanthium), field bindweed (Convolvulus arvensis), and other ruderal grasses and forbs.This community is associated with historically disturbed features of the site (e.g., former croplands or pastures, lawns) that have since been abandoned or unused and colonized by non-native, rapidly growing species. Although disturbed, these portions of the survey area, at the very least, provide food, cover, and open-space habitat for a variety of wildlife, including migratory birds and small mammals, such as prairie dogs, rodents, skunks or rabbits. The Great Plains Saltgrass Saline Wet Meadow community, located primarily in the northwest portion of the survey area, provides high ecological value to wildlife. The creek and large wetland area provides a water source,foraging and hunting grounds for mammals and birds and habitats for fish, amphibians and some reptile species. This area has not been degraded as the surrounding agricultural fields have and shows signs of a healthy ecosystem, including dominantly native vegetation, and frequent wildlife use. The disturbed community is comprised of the single-family home in the northeast portion of the survey area, three oil and gas facilities in the central portion of the survey area, and access roads throughout. The vegetation is severely degraded or completely devoid in most areas. The degraded and disturbed portions of the survey area lack any wildlife value and further fragment the surrounding vegetated areas, reducing the likelihood for wildlife to utilize the survey area. Some other local wildlife species that may use this habitat within the survey area include mule deer (Odocoileus hemionus), red fox (Vulpes vulpes), coyote (Canis latrans), rabbit (Lepus sp.), cottontail 6 ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report (Sylvilagus sp.),fox squirrel(Sciurus niger),deer mouse(Peromyscus maniculatus),striped skunk(Mephitis mephitis), western meadowlark (Sturnella neglecta), hawks (Buteo sp.), frogs (Lithobates sp.), toads (Anaxyrus sp.), garter snake (Thamnophis sp.), and a number of fish species limited to the perennial creek. These types of species may utilize the survey area; however, have not all have been directly identified within the survey area. • Generally, there are features within the survey area and the surrounding area that provide general habitat for local songbirds, raptors, and small to large-sized mammals; however, the majority of habitat within the survey area is characterized primarily as weedy forblands, which is degraded from a wildlife perspective by historic land use practices. • The northwest portion of the survey area, comprised primarily of Great Plains wet meadow and an unnamed perennial creek, provide relatively high ecological value to wildlife, migratory birds, and raptors. Several signs that wildlife frequent the area were observed, including scat, habitat, and prints. At the very least, the water source and available open space within the survey area provide wildlife species with cover, hunting grounds, and foraging areas. 5.0 MIGRATORY BIRD TREATY ACT Migratory birds are protected under the MBTA(16 U.S.C. 730-712). The MBTA makes it illegal for anyone to take, possess, import,export,transport, sell, purchase barter,or offer for sale, purchase, or barter any migratory bird, or the parts, nests, or eggs of such a bird except under the terms of a valid permit issued pursuant to Federal regulations. In Colorado, all birds except for the European starling(Sturnus vulgaris), house sparrow (Passer domesticus), and rock pigeon (Columba livia) are protected under the MBTA. A total of 523 migratory bird species are known to occur in the Mountain-Prairie Region (USFWS Region 6, Montana, Wyoming, Utah, North Dakota, South Dakota, Nebraska, Kansas and Colorado); 320 of the 523 migratory bird species are known to breed in USFWS Region 6. Migratory birds exist within the survey area. The herbaceous and woody developed vegetation community in the survey area provides, at the very least, potential nesting and foraging habitat for migratory birds. These migratory birds are protected under the MBTA, and the killing or possession of these birds (or their parts and nests) is prohibited under the MBTA. The following migratory birds were directly observed and likely utilize the survey area for nesting, foraging and migration corridors. Scientific Name Common Name Agelaius phoeniceus Red-winged blackbird Anas platyrhynchos Mallard duck Buteo swainsoni Swainson's hawk Colaptes auratus Northern flicker Corvus brachyrhynchos American crow Haliaeetus leucocephalus Bald eagle Passer domesticus House sparrow Pica hudsonious Black-billed magpie Zenaida macroura Mourning dove 7 ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report Non-Raptor Migratory Birds Non-raptor migratory birds likely utilize the survey area for foraging and nesting on a seasonal basis.These birds, their eggs, and active nests are protected under the MBTA, and the take or possession of these resources is prohibited. For these non-raptor migratory birds, only the active nest is protected, and no buffers or restricted surrounding areas are required. Once the nest becomes inactive, disturbances can occur to the nest and no further agency authorization or coordination is required. Generally, the active nesting season for most non-raptor migratory birds in this region of Colorado occurs between April 1 and August 31. • No active, non-raptor migratory bird nests were observed within the survey area. Seasonal non- raptor MBTA bird nesting activity status can vary seasonally and from year to year. Prior to vegetation removal,a nest survey should be conducted no more than 7-10 days prior to any future land use changes to ensure that if any nests have become established, they are not disturbed during the nesting season. Non-eagle Raptors Non-eagle raptor nest sites are regulated by the USFWS under the MBTA with local review from the CPW. CPW has established recommended protective buffer zones and seasonal activity restrictions for a variety of Colorado raptors (CPW 2020). The CPW recommended buffer zones are such that, if implemented, should ensure that the majority of the individual species will continue to occupy the area. CPW considers a nest to be active when it is frequented or occupied by a raptor during the breeding season, or which has been occupied in any of the five previous breeding seasons. Many raptors use alternate nests in various years. Thus, a nest site may be active even if a particular nest is not occupied in a given year. The CPW also maintains Species Activity Mapping(CPW SAM)data which is an online database that lists the known occurrences, status, and recorded nest sites of select raptors and other species within the state of Colorado. • One (1)Swainson's hawk was observed perched on the fence along the southern boundary of the survey area; however, no non-eagle raptor nests were observed and no CPW mapped non-eagle raptor nest protection buffer zones are located within the survey area (CPW 2024a). However, nest activity status can vary seasonally and from year-to-year. Future land use changes may require additional nest surveys(generally between February 1 and September 15 (CPW 2020))to determine activity status within 1/4 mile to 1/2 mile of the survey area to ensure compliance with CPW recommendations. Eagles Eagle nest sites are regulated by the USFWS under the MBTA with local review from the CPW. The CPW has established recommend protective buffer zones and activity restrictions for bald and golden eagles (CPW 2020). CPW recommends a "No Surface Occupancy" beyond that which has historically occurred and also recommends"No Human Encroachment"within'A-mile radius and that no human encroachment activities, including construction activities within %Z-mile radius of active nest sites from December 1 through July 31 for eagles. • One (1) bald eagle was observed flying over the survey area; however, no eagle nests were observed within the survey area. No CPW mapped eagle nest protection buffer zones are located 8 ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report within the survey area (CPW 2024a). Future land use changes may require additional nest surveys (generally between December 1 through July 31(CPW 2020))to determine no eagles or eagle nest sites have become established within 1/2 to % mile of the survey area to ensure compliance with CPW recommendations. 6.0 SPECIES PROTECTED UNDER THE ENDANGERED SPECIES ACT OF 1973 The ESA of 1973 was enacted by the United States to conserve endangered and threatened species and the ecosystems that they depend on. Under the ESA, species may be listed as either "endangered" or "threatened"; both designations are protected by law. The ESA is administered by USFWS. The USFWS has developed project specific species lists, available online by request, identifying threatened, endangered,and proposed T&E species, designated critical habitat(USFWS 2025a), and candidate species protected under the ESA that may occur within the boundary of a proposed project and/or may be affected by a proposed project (USFWS 2025b) (Project Code: 2025-0101575). The species list has identified potential for a total of 7 threatened or endangered species within the survey area. Proposed threatened and endangered species under the ESA do not currently have regulatory protection. While these species may appear in the IPaC resource list, they are not included in the table below as they are not subject to regulatory requirements at this time. The following federally listed threatened and endangered species are known to exist within Weld County: Common Name Scientific Name Status* Potential to Occur Ute Ladies'-tresses Sprianthes diluvialis FT LOW Western Prairie Fringed Orchid Platanthera praeclara FT NO Eastern Black Rail Laterallus jamaicensis ssp. FT NO jamaicensis Preble's Meadow Jumping Mouse Zapus hudsonius preblei FT LOW Water Depletion Species Pallid Sturgeon Scaphirhycchus albus FE NO Piping Plover Charadrius melodus FT NO Whooping Crane Grus Americana FE NO *Status key: FT—Federally listed as threatened;FE—Federally listed as endangered Species Not Present The species indicated as "NO" potential to occur are not known to exist within the specific vicinity of the survey area and/or have specific habitat requirements (i.e., elevation range) that are not common in the vicinity of the survey area. Water Depletion Species The USFWS under the ESA has determined that water depletions in the South Platte River Basin are considered an adverse effect to the water species listed. The survey area is located within the South Platte River Basin. Any water related project conducted in the Platte River Basin that has a federal nexus, such as federal funding or a federal permit (i.e., Clean Water Act (CWA) Section 404 Permit), is subject to ESA Section 7 Consultation with the USFWS. The consultation is a mandate for water depletion projects that may affect threatened and endangered species that rely on the South Platte River. • The survey area does not contain the specific habitat characteristics necessary to support the species listed above. These species and/or critical habitat are not present within the survey area 9 ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report (USFWS 2025a)and therefore"NO" potential to occur within the survey area. It is assumed herein that future land use changes would not be considered a new water depletion. Therefore, the project would not result in any potential impact on these species. Species Potentially Within Range For the federally listed threatened and endangered species indicated as "LOW", "MEDIUM", OR "HIGH" potential to occur suggests that the survey area is located within the potential known range of these species and habitat is potentially present. Further analysis was conducted to determine if the species or habitat has the potential to exist within the survey area considering site-specific conditions and characteristics. A brief explanation is provided as to the species life cycle, habitat requirements, and potential occurrence within the survey area. The survey area is not within the designated critical habitat of any federally listed species (USFWS 2025a). UTE LADIES'-TRESSES (SPIRANTHES DILUVIALIS) The Ute ladies'-tresses(ULT) is listed as federally threatened under the ESA. The ULT occurs in seasonally moist soils and wet meadows near springs, lakes, or perennial streams and their associated floodplains below 6,500 feet in elevation in certain areas of Utah, Colorado, Idaho, Wyoming, and Nevada. Typical sites include early successional riparian habitats such as point bars, sand bars, and low lying gravelly, sandy, or cobbly edges. They seem to require "permanent subirrigation", conditions where the water table is close to the surface, but they are not tolerant of permanent standing water. Typical habitat is open and sparsely vegetated, populations decline if trees and shrubs invade the habitat. They do not compete well with aggressive species such as reed canary grass or monocultures of cattails. • The wetland floodplain in the northwest portion of the survey area along the unnamed perennial creek presents suitable habitat for ULT. The gravelly soil type, lack of shrub or tree canopy, and variety of herbaceous vegetation (no aggressive monocultures)within the wetlands are favorable conditions for ULT to establish without competition. However, no observations of ULT have been documented in Weld County (CNHP 2014). Therefore, ULT has a LOW potential to occur, based on the presence of potential suitable habitat and absence of documented observations surrounding the survey area. Should any future land use changes occur in the northwest portion of the survey area, a ULT survey should be completed to verify the presence/absence of ULT species and to avoid potential adverse impacts. PREBLE'S MEADOW JUMPING MOUSE (ZAPUS HUDSONIUS PREBLEI) On May 13, 1998, the US Fish and Wildlife Service issued a final rule to list the Preble's meadow jumping mouse(PMJM) as a federally threatened species under the ESA. PMJM range extends from southwestern Wyoming through eastern Colorado generally below 7,600 feet. In Colorado, PMJM populations are generally restricted to locations along the Front Range foothills and adjacent riparian areas. Schorr and Mihlbachler (2018) describe typical PMJM habitat being restricted to dense shrub cover and dense herbaceous vegetation along wetland and riverine systems. Armstrong et al. (1997) characterize PMJM habitat as "well-developed plains riparian vegetation with relatively undisturbed grassland and a water source in close proximity."Also noted in Armstrong et al. (1997)was a preference for"dense herbaceous vegetation consisting of a variety of grasses, forbs and thick shrubs". The PMJM hibernates in an 10 ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report underground burrow from September to May. PMJM bears two to three litters per year, averaging five young per litter, in a grass-lined nest. Areas that are highly disturbed or modified (including landscaped lots and paved areas) or wetland areas dominated by cattails are excluded from this recommendation. • According to USFWS survey data, seven (7) trap sites were recorded between 100 and 4,000 feet east of the survey area.These sites collected data between 1998 and 2017. No PMJM individuals were trapped in the 7 surveys (USFWS 2018). No USFWS designated critical habitat occurs within the survey area (USFWS 2025a). • The Great Plains Saltgrass Saline Wet Meadow vegetation community along the unnamed creek in the northwest portion of the survey area could be considered potential habitat for PMJM.The other highly disturbed and unvegetated areas are not conducive to PMJM.While the Great Plains Saltgrass Saline Wet Meadow does represent potential habitat for PMJM,the previous 7 trapping efforts in the area have not identified the presence of PMJM. Therefore, PMJM has a LOW potential to occur, based on the presence of potential suitable habitat and absence of positive trapping results surrounding the survey area. Should any future land use changes occur in the northwest portion of the survey area, a PMJM survey should be completed to verify the presence/absence of individual PMJM species and to avoid potential adverse impacts. 7.0 STATE THREATENED AND ENDANGERED SPECIES Species identified as state threatened or endangered are protected by the CPW under Colorado Statute Title 33. State regulations prohibit "any person to take, possess, transport, export, process, sell or offer for sale, or ship and for any common or contract carrier to knowingly transport or receive for shipment" any species or subspecies listed as state endangered or threatened. The CPW also has identified State Species of Special Concern,which are species or subspecies of native wildlife that are currently vulnerable in their Colorado range and have the potential to become threatened or endangered. Species of Special Concern are not protected under State regulations but the 'take' of individuals and disturbance of their habitat is strongly discouraged. All state listed species were screened as potential inhabitants of the survey area based on general habitat requirements and CPW Species Profiles (CPW 2025b). ERC evaluated the species listed by CPW as threatened or endangered that could potentially exist within the survey area. All animal species listed above as threatened or endangered by the USFWS are also listed by the CPW as threatened or endangered, respectively, therefore were not duplicated below. Common Name _ Scientific Name Status* Potential to Occur Boreal toad Bufo boreas boreas SE NO Burrowing owl Athene cunicularia ST MEDIUM Least tern Sterna antillarum SE NO Lesser prairie-chicken Tympanuchus pallidicinctus ST NO Mexican Spotted Owl Strix occidentalis lucida ST NO Plains sharp-tailed grouse Tympanuchus phasianellus jamesii SE NO Southwestern willow flycatcher Empidonax traillii extimus SE NO Arkansas darter Etheostoma cragini ST NO 11 ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report Common Name Scientific Name Status* Potential to Occur Bonytail Gila elegans SE NO Brassy minnow Hybognathus hankinsoni ST NO Colorado pikeminnow Ptychocheilus lucius ST NO Common shiner Luxilus cornutus ST NO Humpback chub Gila cypha ST NO Greenback cutthroat trout Oncorhynchus clarki stomias ST NO Lake chub Couesius plumbeus SE NO Northern redbelly dace Phoxinus eos SE NO Plains minnow Hybognathus placitus SE NO Rio Grande sucker Catostomus plebeius SE NO Razorback sucker Xyrauchen texanus SE NO Southern redbelly dace Phoxinus erythrogaster SE NO Suckermouth minnow Phenacobius mirabilis SE NO Black-footed ferret Mustela nigripes SE LOW Gray wolf Canis lupus SE NO Grizzly bear Ursus arctos SE NO Kit fox Vulpes macrotis SE NO Lynx Lynx canadensis SE NO River otter Lontra canadensis ST NO Wolverine Gulo gulo SE NO *Status key:ST—State listed as threatened;SE—State listed as endangered Species Not Present The threatened and endangered species with "NO" potential to occur are identified to occur within the state(CPW 2025a). However,these species are not known to exist within the specific vicinity of the survey area and/or have specific habitat requirements (i.e., elevation range) that are not common in the vicinity of the survey area (CPW 2024a and USFWS 2025b). The survey area does not contain the specific habitat characteristics necessary to support the species listed above.These species and/or critical habitat are not present within the survey area.Therefore, any future land use changes will have no effect on the species, their habitats, or proposed or designated critical habitat. Species Potentially within Range For the state listed threatened and endangered species indicated as "LOW", "MEDIUM", OR "HIGH" potential to occur suggests that the survey area is located within the potential known range of these species and habitat is potentially present. Further analysis was conducted to determine if the species or habitat has the potential to exist within the survey area considering site-specific conditions and characteristics. A brief explanation is provided as to the species life cycle, habitat requirements, and potential occurrence within the survey area. The survey area is not within the designated critical habitat of any federally listed species (USFWS 2025). 12 A ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report BLACK-FOOTED FERRET(MUSTELA NIGRIPES) The black-footed ferret (BFF) (Mustela nigripes) is a medium-sized mustelid (a member of the weasel family). The BFF is the only ferret species native to the Americas. Its historical range spanned much of western North America's intermountain and prairie grasslands, extending from Canada to Mexico. Historically, BFF habitat coincided with the habitats of black-tailed prairie dog (C. ludovicianus), Gunnison's prairie dog(C.gunnisoni),and white-tailed prairie dog(C.leucurus). Prairie dogs make up more than 90% of the BFF's diet. BFFs are limited to open habitat, the same habitat used by prairie dogs: grasslands, steppe, and shrub steppe. It depends largely on prairie dogs: ferrets prey on prairie dogs and utilize their burrows for shelter and denning (Hill man and Clark 1980). It has been estimated that about 40-60 hectares of prairie dog colony are needed to support one ferret (Belant and Biggins 2008). BFFs once numbered in the tens of thousands, but due to a combination of human-induced threats they were believed to be extinct twice in the 20th century. As of 2015, BFFs have been reintroduced in the wild at 24 sites across 8 states, Canada, and Mexico. • No black-footed ferret individuals were observed in or surrounding the survey area. However, approximately 20 acres within the survey area contain active prairie dog burrows, which are considered potential ferret habitat and food source.The nearest BFF release site identified in CPW Species Activity Mapping (SAM) data is in Rocky Mountain Arsenal National Wildlife Refuge, approximately 26 miles south of the survey area. The distance and high-density urban environment between the release site and the survey area renders it unlikely for BFF individuals to have established in or near the survey area. Therefore, black-footed ferrets have a LOW potential to occur, based on the presence of potential suitable habitat and distance from the nearest release site. • According to USFWS, the survey area is located within the Block Clearance Area for BFF Surveys in Colorado (USFWS 2007). Land within a Block Clearance Area no longer contains any wild, free- ranging black-footed ferrets. All activities within block clearance areas that result in the removal of black-tailed prairie dogs and/or their habitat will no longer be required to meet the USFWS survey guidelines for black-footed ferrets or undergo consultation under Section 7 of the ESA (USFWS 2007).Therefore, any future land use changes within the Site would not adversely affect the continued existence or potential habitat of this species. BURROWING OWL(ATHENE CUNICULARIA) The burrowing owl (Owl) is listed as a state threatened species in Colorado.The Owl is small (length of 24 centimeters), long-legged,boldly spotted,and barred with brown and white.The Owl is a breeding species across the plains of eastern Colorado; however, they rarely winter in the state. Nesting habitat is in burrows,especially in both active and inactive prairie dog colonies, located in grasslands, mountain parks, well-drained steppes, deserts, prairies, and agricultural lands from late March through October.The Owl can usually be observed on low perches such as fence posts, dirt mounds or the ground. Clutch size of this Owl averages six to seven and incubation lasts up to 30 days.The owlets usually run and forage at 4 weeks and fly at 6 weeks. Primary threats to existence of this species are habitat loss due to intensive agriculture, habitat degradation and fragmentation due to control of burrowing mammals and predation by cats and dogs. 13 ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report • No Owl individuals were observed in or surrounding the survey area. However, approximately 20 acres within the survey area contain prairie dog burrows, which is considered potential Owl habitat (Figure 3).Therefore, Owls have a MEDIUM potential to occur, based on the presence of potential suitable habitat. • Any disturbances, including construction, should not occur during Owl breeding season in Colorado(generally between March 15 and October 31)without an Owl survey.According to CPW guidelines, disturbance is prohibited within 1/8 mile (660 feet) of a Burrowing Owl nesting site during nesting season, March 15 through August 31 (CPW 2020). • Prior to any future land use changes, a burrowing owl survey is recommended in accordance with CPW Burrowing Owl Survey Protocol(CPW 2021).Owl surveys should be conducted in accordance with the CPW Burrowing Owl Survey protocol (CPW 2021) during this time frame to determine the presence of the species in the survey area prior to commencing construction. 8.0 HIGH PRIORITY HABITAT AREAS CPW has developed Recommendations to Avoid and Minimize Impacts to Wildlife from Land Use Development in Colorado in July of 2023(CPW 2023). CPW is a recommending agency in regard to energy and land use development, however,CPW has no regulatory authority over these processes(CPW 2025c). The recommendations identify High Priority Habitat (HPH) by species and provide general recommendations related to disturbances.These recommendations were originally developed specifically for the Colorado Oil and Gas Commission as part of fluid mineral development; however, CPW has provided these recommendations for other land use proposals. • According to CPW, there are no aquatic high priority habitats within the survey area. However, a terrestrial HPH, Mule Deer Migration Corridor HPHD, occurs on the east side of Meadow Island Ditch Number 1 in the northeast portion of the survey area (CPW 2024b) (Figure 4). • Per CPW recommendations,the mule deer migration corridor has an imposed time limitation (TL) that prohibits any permitted or authorized human activities between December 1 and April 30 (CPW 2023).Therefore, any future land use changes should occur outside of the CPW-listed TL. 14 NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report • v 0 • C I rw, • LEGEND Survey Area Prarie Dog Colony Prepared By: N FIGURE 3 tit Q D A ERC PRAIRIE DOG COLONY MAP 2820 Wilderness Place,Suite A Boulder,CO 80301 NCCI PIT#1 EXPANSION AREA 0 300 600 (303)679-4820 WELD COUNTY, COLORADO Feel ERC#:420-2501 15 A Eti_ NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report z '". a # , , , t 1,- ..,,, N. 4 ,,I i'N _. " t .1 '11- '41/ht..... . LEGEND - ._ " Survey Area Mule Deer Migration Corridor HPHD i ram. Prepared By: N FIGURE 4 ri; ; C CPW DESIGNATED HIGH PRIORITY HABITAT (HPH)AREAS 2820 Wilderness Place,Suite A Boulder,CO 80301 0 300 600 (303)679-4820 NCCI PIT#1 EXPANSION AREA Feet ERc#:420-2501 WELD COUNTY, COLORADO 16 46, ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report 9.0 SUMMARY AND RECOMMENDATIONS ERC has conducted this screening for federal and state listed threatened and endangered species and general wildlife for the approximately 67-acre survey area.The following provides key items identified as part of this report: 1. Four(4) primary land use class/vegetation cover types exist within the survey area. Habitat within the survey area is characterized as Great Plains Saltgrass Saline Wet Meadow (4%), Weedy Forbs Great Plains Ruderal Forbland (87%), Disturbed (7.5%), and Water(1.5%). Historic land uses associated with oil and gas activities and farming practices followed by vacancy have led to degradation of the native vegetation community. 2. Generally, there are features within the northwest portion of the survey area and the surrounding properties that provide general habitat for migratory birds, raptors, amphibians, fish, and small to large-sized mammals. However, habitat within the survey area is somewhat degraded and of lower ecological value from a wildlife perspective due to historic and current land use of the survey area and surrounding properties, which has restricted overall growth and establishment of native vegetation. 3. Non-raptor birds: No active non-raptor bird nests were observed within the survey area.A nest survey should be completed no more than 7-10 days prior to vegetation or debris removal to ensure that active nests are not disturbed and that no new nests have become established within the survey area. Non-eagle Raptors: No non-eagle raptor nests were observed nor are any CPW mapped non-eagle raptor nest protection zones located within the survey area (CPW 2024a). Nest activity status can vary seasonally and from year-to-year. Future land use changes may require additional nest surveys (generally between February 1 and September 15 (CPW 2020)) to determine activity status within to%z mile of the survey area to ensure compliance with CPW recommendations. Eagles: No eagle nests were observed nor are any CPW mapped eagle nests located within the survey area (CPW 2024a). However, nest activity status can vary seasonally and from year-to-year. Future land use changes may require additional nest surveys (generally between December 1 and July 31 (CPW 2020)) to determine activity status within %to 1/2 mile of the survey area to ensure compliance with CPW recommendations. 4. No federally listed threatened and endangered species and/or habitat protected under the ESA were identified within the survey area. The survey area is not within designated critical habitat of any federally listed species. Preble's meadow jumping mouse and Ute ladies'-tresses are both considered to have a LOW potential to occur due to potentially suitable habitat in the northwest portion of the survey area. Should any future land use changes occur in the northwest portion of the survey area, a ULT and PMJM survey should be completed to verify the presence/absence of individual species and to avoid potential adverse impacts. 5. No State listed threatened or endangered species and/or habitat protected by CPW under Colorado Statute Title 33 were identified within the survey area. Burrowing owls are considered to have MEDIUM potential to occur due to a prairie dog colony occupying a large portion of the survey area. Prior to any future land use changes, a burrowing owl survey should be conducted during the nesting 17 ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report season, March 15 through August 31, to verify the presence/absence of burrowing owls. Any anticipated construction should take place outside of the burrowing owl nesting season. 6. CPW-designated terrestrial HPH, Mule Deer Migration Corridor, is present in the northeast portion of the survey area. Per CPW recommendations, the mule deer migration corridor has an imposed time limitation (TL) that prohibits any permitted or authorized human activities between December 1 and April 30 (CPW 2023). Therefore, any future land use changes should occur outside of the CPW-listed TL. This report has been prepared by: ECOLOGICAL RESOURCE CONSULTANTS, LLC /rt—/ fr— Natalie Rothman, Ecologist,WPIT (303) 679-4820 x 116/natalie@erccolorado.net Tyler Worley,Sen logist, Certified Ecologist (303) 679-4820 x 105/tyler@erccolorado.net 18 . ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report 10.0 REFERENCES CNHP. Colorado Natural Heritage Program. 2014. Colorado Rare Plant Guide-Spiranthes diluvialis. CPW. Colorado Parks and Wildlife. 2020. Recommended Buffer Zones and Seasonal Restrictions for Raptors. Available online at: https://cpw.state.co.us/Documents/Wild lifeSpecies/LivingWithWildlife/RaptorBufferGuidelines200 8.pdf CPW. Colorado Parks and Wildlife. 2023. CPW Recommendations to Avoid and Minimize Impacts to Wildlife from Land Use Development in Colorado. July 19. Available online at: https://cpw.state.co.us/Documents/Conservation-Resources/Energy-Mining/CPW HPH-Map- Layers.pdf CPW. Colorado Parks and Wildlife. 2024a. Species Activity Mapping (SAM), Geographic Information Systems (GIS) Data. Updated December. Available online at: https://cpw.maps.arcgis.com/apps/instant/interactivelegend/index.html?appid=b3e1f4c17e98481c 85f9683b02e91250 CPW. Colorado Parks and Wildlife. 2024b. CPW High Priority Habitat (HPH) data. Updated December. Available online at: https://www.arcgis.com/home/item.html?id=104877140e534e52840a2bc380390495 CPW. Colorado Parks and Wildlife. 2025a. Threatened and Endangered List. Available at http://cpw.state.co.us/learn/Pages/SOC-ThreatenedEndangeredList.aspx CPW. Colorado Parks and Wildlife. 2025b. Species Profiles. Available online at: https://cpw.state.co.us/species-profiles CPW. Colorado Parks and Wildlife. 2025c. Energy Development and Land Use. Available online at: https://cpw.state.co.us/conservation/Pages/CON-Energy-Land.aspx Faber-Langendoen,D.,T.Keeler-Wolf, D.Meidinger,C.Josse,A.Weakley,D.Tart,G. Navarro, B. Hoagland, S. Ponomarenko, J.-P. Saucier, G. Fults, and E. Helmer. 2016. Classification and description of world formation types. General Technical Report RMRS-GTR-346. USDA Forest Service, Rocky Mountain Research Station, Fort Collins, CO. Hillman, C. N. and Clark,T. W. 1980. Mustela nigripes.American Society of Mammalogists, Lawrence, KS. Mammalian Species Number 126:1-3. NatureServe. 2025. NatureServe Explorer Central Database. Ecological Association Comprehensive Report. Available online at: http://explorer.natureserve.org. May. USFWS. US Fish & Wildlife Service. 2007. USFWS Block Clearance Areas for Black-Footed Ferret Surveys Near Denver, Colorado.July. USFWS. US Fish &Wildlife Service. 2017. Section 4 of the Endangered Species Act. Candidate Species. USFWS. US Fish & Wildlife Service. 2018. Preble's meadow jumping mouse (Zapus hudsonius preblei) trapping database for scientific collection activities conducted under section 10 of the Endangered Species Act. Colorado Ecological Services Field Office. Denver. USFWS. US Fish &Wildlife Service. 2025a. Critical Habitat for Threatened & Endangered Species. Updated February 25. Available online at: 19 ERC NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report https://fws.maps.arcgis.com/home/webmap/viewer.html?webmap=9d8de5e265ad4fe09893cf75b 8d bfb77 USFWS. US Fish&Wildlife Service. 2025b. Official Species List. List of threatened and endangered species that may occur in your proposed project location, and/or may be affected by your proposed project. Project Code: 2025-0101575. May 27. 20 NCCI Pit#1 Expansion Area Threatened & Endangered Species and General Wildlife Screening Report APPENDIX A 21 I •. W'I 11 V 1•V1 111.1111 United States Department of the Interior FISH AND WILDLIFE SERVICE Colorado Ecological Services Field Office Denver Federal Center P.O.Box 25486 Denver,CO 80225-0486 Phone: (303)236-4773 Fax: (303)236-4005 In Reply Refer To: 05/27/2025 15:01:58 UTC Project Code: 2025-0101575 Project Name: NCCI Pit#1 Expansion Subject: List of threatened and endangered species that may occur in your proposed project location or may be affected by your proposed project To Whom It May Concern: The enclosed species list identifies threatened, endangered, proposed and candidate species, as well as proposed and final designated critical habitat, that may occur within the boundary of your proposed project and/or may be affected by your proposed project. The species list fulfills the requirements of the U.S. Fish and Wildlife Service (Service) under section 7(c) of the Endangered Species Act(Act) of 1973, as amended (16 U.S.C. 1531 et seq.). New information based on updated surveys, changes in the abundance and distribution of species, changed habitat conditions, or other factors could change this list. Please feel free to contact us if you need more current information or assistance regarding the potential impacts to federally proposed, listed, and candidate species and federally designated and proposed critical habitat. Please note that under 50 CFR 402.12(e) of the regulations implementing section 7 of the Act, the accuracy of this species list should be verified after 90 days. This verification can be completed formally or informally as desired. The Service recommends that verification be completed by visiting the IPaC website at regular intervals during project planning and implementation for updates to species lists and information.An updated list may be requested through the IPaC system by completing the same process used to receive the enclosed list. The purpose of the Act is to provide a means whereby threatened and endangered species and the ecosystems upon which they depend may be conserved. Under sections 7(a)(1) and 7(a)(2) of the Act and its implementing regulations (50 CFR 402 et seq.), Federal agencies are required to utilize their authorities to carry out programs for the conservation of threatened and endangered species and to determine whether projects may affect threatened and endangered species and/or designated critical habitat. A Biological Assessment is required for construction projects (or other undertakings having similar physical impacts) that are major Federal actions significantly affecting the quality of the human environment as defined in the National Environmental Policy Act (42 U.S.C. 4332(2) Project code: 2025-0101575 05/27/2025 15:01:58 UTC (c)). For projects other than major construction activities, the Service suggests that a biological evaluation similar to a Biological Assessment be prepared to determine whether the project may affect listed or proposed species and/or designated or proposed critical habitat. Recommended contents of a Biological Assessment are described at 50 CFR 402.12. If a Federal agency determines, based on the Biological Assessment or biological evaluation, that listed species and/or designated critical habitat may be affected by the proposed project, the agency is required to consult with the Service pursuant to 50 CFR 402. In addition, the Service recommends that candidate species, proposed species and proposed critical habitat be addressed within the consultation. More information on the regulations and procedures for section 7 consultation, including the role of permit or license applicants, can be found in the "Endangered Species Consultation Handbook" at: https://www.fws.gov/sites/default/files/documents/endangered-species-consultation- handbook.pdf Migratory Birds: In addition to responsibilities to protect threatened and endangered species under the Endangered Species Act (ESA), there are additional responsibilities under the Migratory Bird Treaty Act(MBTA) and the Bald and Golden Eagle Protection Act (BGEPA) to protect native birds from project-related impacts.Any activity, intentional or unintentional, resulting in take of migratory birds, including eagles, is prohibited unless otherwise permitted by the U.S. Fish and Wildlife Service (50 C.F.R. Sec. 10.12 and 16 U.S.C. Sec. 668(a)). For more information regarding these Acts, see https://www.fws.gov/program/migratory-bird-permit/what- we-do. The MBTA has no provision for allowing take of migratory birds that may be unintentionally killed or injured by otherwise lawful activities. It is the responsibility of the project proponent to comply with these Acts by identifying potential impacts to migratory birds and eagles within applicable NEPA documents (when there is a federal nexus) or a Bird/Eagle Conservation Plan (when there is no federal nexus). Proponents should implement conservation measures to avoid or minimize the production of project-related stressors or minimize the exposure of birds and their resources to the project-related stressors. For more information on avian stressors and recommended conservation measures, see https://www.fws.gov/library/collections/threats-birds. In addition to MBTA and BGEPA, Executive Order 13186: Responsibilities of Federal Agencies to Protect Migratory Birds, obligates all Federal agencies that engage in or authorize activities that might affect migratory birds, to minimize those effects and encourage conservation measures that will improve bird populations. Executive Order 13186 provides for the protection of both migratory birds and migratory bird habitat. For information regarding the implementation of Executive Order 13186, please visit https://www.fws.gov/partner/council-conservation- migratory-birds. We appreciate your concern for threatened and endangered species. The Service encourages Federal agencies to include conservation of threatened and endangered species into their project planning to further the purposes of the Act. Please include the Consultation Code in the header of this letter with any request for consultation or correspondence about your project that you submit to our office. 2 of 8 Project code: 2025-0101575 05/27/2025 15:01:58 UTC Attachment(s): ■ Official Species List OFFICIAL SPECIES LIST This list is provided pursuant to Section 7 of the Endangered Species Act, and fulfills the requirement for Federal agencies to "request of the Secretary of the Interior information whether any species which is listed or proposed to be listed may be present in the area of a proposed action". This species list is provided by: Colorado Ecological Services Field Office Denver Federal Center P.O. Box 25486 Denver, CO 80225-0486 (303) 236-4773 3 of 8 Project code: 2025-0101575 05/27/2025 15:01:58 UTC PROJECT SUMMARY Project Code: 2025-0101575 Project Name: NCCI Pit#1 Expansion Project Type: Subsurface Exploration - Non Energy Materials Project Description: gravel mining Project Location: The approximate location of the project can be viewed in Google Maps: https:// www.google.com/maps/@40.1278467,-104.83358949594374,14z ti Counties: Weld County, Colorado 4of8 Project code: 2025-0101575 05/27/2025 15:01:58 UTC ENDANGERED SPECIES ACT SPECIES There is a total of 9 threatened, endangered, or candidate species on this species list. Species on this list should be considered in an effects analysis for your project and could include species that exist in another geographic area. For example, certain fish may appear on the species list because a project could affect downstream species. Note that 2 of these species should be considered only under certain conditions. IPaC does not display listed species or critical habitats under the sole jurisdiction of NOAA Fisheries', as USFWS does not have the authority to speak on behalf of NOAA and the Department of Commerce. See the "Critical habitats" section below for those critical habitats that lie wholly or partially within your project area under this office's jurisdiction. Please contact the designated FWS office if you have questions. 1. NOAA Fisheries, also known as the National Marine Fisheries Service (NMFS), is an office of the National Oceanic and Atmospheric Administration within the Department of Commerce. 5 of 8 Project code: 2025-0101575 05/27/2025 15:01:58 UTC MAMMALS NAME STATUS Preble's Meadow Jumping Mouse Zapus hudsonius preblei Threatened There is final critical habitat for this species.Your location does not overlap the critical habitat. Species profile:https://ecos.fws.gov/ecp/species/4090 General project design guidelines: https://ipac.ecosphere.fws.gov/project/GDONTBNK5NCP3IXNGKCIXV6FJU/documents/ generated/6861.pdf BIRDS NAME STATUS Eastern Black Rail Laterallus jamaicensis ssp.jamaicensis Threatened No critical habitat has been designated for this species. Species profile:https://ecos.fws.gov/ecp/species/10477 Piping Plover Charadrius melodus Threatened Population: [Atlantic Coast and Northern Great Plains populations]-Wherever found,except those areas where listed as endangered. There is final critical habitat for this species.Your location does not overlap the critical habitat. This species only needs to be considered under the following conditions: ■ Project includes water-related activities and/or use in the N.Platte, S.Platte,and Laramie River Basins which may affect listed species in Nebraska. Species profile:https://ecos.fws.gov/ecp/species/6039 Whooping Crane Grus americana Endangered Population:Wherever found,except where listed as an experimental population There is final critical habitat for this species.Your location does not overlap the critical habitat. Species profile:https://ecos.fws.gov/ecp/species/758 FISHES NAME STATUS Pallid Sturgeon Scaphirhynchus albus Endangered No critical habitat has been designated for this species. This species only needs to be considered under the following conditions: ■ Water use or contamination may adversely affect the species.Within the Platte River basin, depletions may adversely affect the species.These affects must be considered even outside occupied range. See local FWS office for more information. Species profile:https://ecos.fws.gov/ecp/species/7162 INSECTS NAME STATUS Monarch Butterfly Danaus plexippus Proposed There is proposed critical habitat for this species.Your location does not overlap the critical Threatened habitat. Species profile:https://ecos.fws.gov/ecp/species/9743 6 of 8 Project code: 2025-0101575 05/27/2025 15:01:58 UTC NAME STATUS Suckley's Cuckoo Bumble Bee Bombus suckleyi Proposed Population: Endangered No critical habitat has been designated for this species. Species profile:https://ecos.fws.gov/ecp/species/10885 FLOWERING PLANTS NAME STATUS Ute Ladies'-tresses Spiranthes diluvialis Threatened No critical habitat has been designated for this species. Species profile:https://ecos.fws.gov/ecp/species/2159 General project design guidelines: https://ipac.ecosphere.fws.gov/project/GDONTBNK5NCP3IXNGKCIXV6FJU/documents/ generated/8153.pdf Western Prairie Fringed Orchid Platanthera praeclara Threatened No critical habitat has been designated for this species. Species profile:https://ecos.fws.gov/ecp/species/1669 CRITICAL HABITATS THERE ARE NO CRITICAL HABITATS WITHIN YOUR PROJECT AREA UNDER THIS OFFICE'S JURISDICTION. YOU ARE STILL REQUIRED TO DETERMINE IF YOUR PROJECT(S)MAY HAVE EFFECTS ON ALL ABOVE LISTED SPECIES. 7 of 8 Project code: 2025-0101575 05/27/2025 15:01:58 UTC IPAC USER CONTACT INFORMATION Agency: Private Entity Name: Natalie Rothman Address: 2820 Wilderness Place Address Line 2: Suite A City: Boulder State: CO Zip: 80301 Email natalie@erccolorado.net Phone: 3036794820 8 of 8 EXHIBIT I Soils Information According to the Soil Survey of Weld County, Colorado, Southern Part, (United States Department of Agriculture, Natural Resource Conservation Service, Web Soil Survey 2.0, National Cooperative Soil Survey), there are three major soil types within the project area: 1. Altvan loam, 0 to 1 percent slopes 2. Aquolls and Aquents, gravelly substratum 3. Ellicott-Ellicott sandy—skeletal complex, 0 to 3 percent slopes, rarely flooded The location of these soil types relative to the project area is illustrated on the attached Natural Resources Conservation Service map and legend. Detailed descriptions of each NRCS soil type are below. Map Unit: 1 —Altvan loam, 0 to 1 percent slopes Map Unit: 3—Aquolls and Aquents, gravelly substratum Map Unit: 10— Ellicott-Ellicott sandy— skeletal complex, 0 to 3 percent slopes, rarely flooded See attached NRCS report for the permit boundary area. • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application Soil Map—Weld County,Colorado,Southern Part N M O CO-' � 8 513600 513700 513800 513900 514000 514100 514200 514300 514400 5145W 514600 I 40°T 52"N S1 p 40°7 52 N MI 7 gg 3 ••. b 0 ; '. -#170 Bu Qd I i CV 8 - fi. °• ' 8 7 1 9,', ' 1 ri I , 0 'I #' C ,, 0 i 1 4'' 1 ''' t _.„___ 1 ' P , t lFll • i I1,`1d -.!6 ! { ,-0'� N.' 1 -Say N.q'• "tr If� � 8 .v 2000 i Inp mow'�10 Lt wnlEd at this sca0G° _A_ ', • ,, ' • ?! 5� t6 _ - n ' ' - 1 .�� --- '1, I t Q 40°T 28"N " " I '4 40°7'28"N 513600 513700 513800 513900 514000 514100 514200 514300 514400 514500 514600 m m Map Scale:1:5,330 if prir rltd on A landscape(11"x 8.5")sheet. Meters .Ti- S N 0 50 100 200 300 c AFeet 0 250 500 1000 1500 Map projecton:Web Mercator Comer coo dinates:WGS84 Edge tics:UTM Zone 13N WGS84 USDA Natural Resources Web Soil Survey 1/23/2026 Conservation Service National Cooperative Soil Survey Page 1 of 3 Soil Map—Weld County,Colorado,Southern Part MAP LEGEND MAP INFORMATION Area of Interest(Aol) = Spoil Area The soil surveys that comprise your AOI were mapped at Area of Interest(AOI) 1:24,000. Stony Spot Soils •• Very Stony Spot Warning:Soil Map may not be valid at this scale. Soil Map Unit Polygons •• Wet Spot Enlargement of maps beyond the scale of mapping can cause • • Soil Map Unit Lines misunderstanding of the detail of mapping and accuracy of soil Other line placement.The maps do not show the small areas of Soil Map Unit Points contrasting soils that could have been shown at a more detailed «� Special Line Features Special Point Features scale. V Blowout Water Features Streams and Canals Please rely on the bar scale on each map sheet for map • Borrow Pit measurements. Transportation * Clay Spot .-4« Rails Source of Map: Natural Resources Conservation Service V Closed Depression Web Soil Survey URL: .,0 Interstate Highways Coordinate System: Web Mercator(EPSG:3857) X Gravel Pit US Routes Maps from the Web Soil Survey are based on the Web Mercator •, Gravelly Spot Major Roads projection,which preserves direction and shape but distorts distance and area.A projection that preserves area,such as the O Landfill Local Roads Albers equal-area conic projection,should be used if more A Lava Flow accurate calculations of distance or area are required. Background 416. Marsh or swamp III Aerial Photography This product is generated from the USDA-NRCS certified data as of the version date(s)listed below. IR Mine or Quarry Soil Survey Area: Weld County,Colorado,Southern Part O Miscellaneous Water Survey Area Data: Version 24,Aug 29,2025 Q Perennial Water Soil map units are labeled(as space allows)for map scales V Rock Outcrop 1:50,000 or larger. Saline Spot Date(s)aerial images were photographed: Jun 8,2021—Jun 12, 2021 • Sandy Spot • • The orthophoto or other base map on which the soil lines were Severely Eroded Spot compiled and digitized probably differs from the background imagery displayed on these maps.As a result,some minor Co Sinkhole shifting of map unit boundaries may be evident. 3) Slide or Slip 0o Sodic Spot USDA Natural Resources Web Soil Survey 1/23/2026 Conservation Service National Cooperative Soil Survey Page 2 of 3 Soil Map—Weld County,Colorado,Southern Part Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 1 Altvan loam,0 to 1 percent 8.8 7.5% slopes 3 Aquolls and Aquents,gravelly 104.2 88.8% substratum 10 Ellicott-Ellicott sandy-skeletal 4.3 3.7% complex,0 to 3 percent slopes,rarely flooded Totals for Area of Interest 117.3 100.0% USDA Natural Resources Web Soil Survey 1/23/2026 Conservation Service National Cooperative Soil Survey Page 3 of 3 Component Text Descriptions--Weld County,Colorado,Southern Part Component Text Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the selected area. The component descriptions in this report, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the associated soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas (components)for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. The "Map Unit Component Nontechnical Descriptions" report gives a brief, general description of the soil components that occur in a map unit. Descriptions of nonsoil (miscellaneous areas) and minor map unit components may or may not be included. This description is written by the local soil scientists responsible for the respective soil survey area data. A more detailed description can be generated by the "Map Unit Description" report. Additional information about the map units described in this report is available in other Soil Data Mart reports, which give properties of the soils and the limitations, capabilities, and potentials for many uses. Also, the narratives that accompany the Soil Data Mart reports define some of the properties included in the map unit descriptions. Report—Component Text Descriptions Weld County, Colorado, Southern Part Map Unit: 1—Altvan loam, 0 to 1 percent slopes Description Category: GENSOIL Altvan: 90 percent USDA Natural Resources Web Soil Survey 1/23/2026 Conservation Service National Cooperative Soil Survey Page 1 of 4 Component Text Descriptions--Weld County,Colorado,Southern Part The Altvan component makes up 90 percent of the map unit. Slopes are 0 to 1 percent. This component is on terraces. The parent material consists of old alluvium. Depth to a root restrictive layer is greater than 60 inches. The natural drainage class is well drained. Water movement in the most restrictive layer is moderately high. Available water to a depth of 60 inches (or restricted depth) is low. Shrink-swell potential is low. This soil is not flooded. It is not ponded. There is no zone of water saturation within a depth of 72 inches. Organic matter content in the surface horizon is about 2 percent. This component is in the R067BY002C0 Loamy Plains ecological site. Nonirrigated land capability classification is 4e. Irrigated land capability classification is 3s. This soil does not meet hydric criteria. The calcium carbonate equivalent within 40 inches, typically, does not exceed 3 percent. Description Category: GENSOIL Cascajo: 9 percent Generated brief soil descriptions are created for major soil components. The Cascajo soil is a minor component. Description Category: GENSOIL Aquic haplustolls: 1 percent Generated brief soil descriptions are created for major soil components. The Aquic Haplustolls soil is a minor component. Map Unit: 3—Aquolls and Aquents, gravelly substratum Description Category: GENSOIL Aquolls: 55 percent The Aquolls component makes up 55 percent of the map unit. Slopes are 0 to 3 percent. This component is on swales, major streams, flood plains. The parent material consists of recent alluvium. Depth to a root restrictive layer is greater than 60 inches. The natural drainage class is poorly drained. Water movement in the most restrictive layer is moderately high. Available water to a depth of 60 inches (or restricted depth) is moderate. Shrink-swell potential is low. This soil is frequently flooded. It is not ponded. A seasonal zone of water saturation is at 27 inches during March, April, May, June, July. Organic matter content in the surface horizon is about 2 percent. This component is in the R067BY035C0 Salt Meadow ecological site. Nonirrigated land capability classification is 6w. This soil meets hydric criteria. There are no saline horizons within 30 inches of the soil surface. Description Category: GENSOIL Aquents, gravelly substratum: 30 percent USDA Natural Resources Web Soil Survey 1/23/2026 Conservation Service National Cooperative Soil Survey Page 2 of 4 Component Text Descriptions--Weld County,Colorado,Southern Part The Aquents, gravelly substratum component makes up 30 percent of the map unit. Slopes are 0 to 3 percent. This component is on stream terraces. The parent material consists of recent alluvium. Depth to a root restrictive layer is greater than 60 inches. The natural drainage class is poorly drained. Water movement in the most restrictive layer is moderately high. Available water to a depth of 60 inches (or restricted depth) is moderate. Shrink-swell potential is low. This soil is frequently flooded. It is not ponded. A seasonal zone of water saturation is at 15 inches during March, April, May, June, July, August, September. Organic matter content in the surface horizon is about 1 percent. This component is in the R067BY035C0 Salt Meadow ecological site. Nonirrigated land capability classification is 6w. Irrigated land capability classification is 6w. This soil meets hydric criteria. The calcium carbonate equivalent within 40 inches, typically, does not exceed 5 percent. The soil has a very slightly saline horizon within 30 inches of the soil surface. Description Category: GENSOIL Bankard: 10 percent Generated brief soil descriptions are created for major soil components. The Bankard soil is a minor component. Description Category: GENSOIL Ustic torrifluvents: 5 percent Generated brief soil descriptions are created for major soil components. The Ustic Torrifluvents soil is a minor component. Map Unit: 10—Ellicott-Ellicott sandy-skeletal complex, 0 to 3 percent slopes, rarely flooded Description Category: GENSOIL Ellicott, rarely flooded: 65 percent The Ellicott, rarely flooded component makes up 65 percent of the map unit. Slopes are 0 to 3 percent. This component is on drainageways on uplands, flood plains on intermittent streams on uplands. The parent material consists of noncalcareous, stratified sandy alluvium. Depth to a root restrictive layer is greater than 60 inches. The natural drainage class is excessively drained. Water movement in the most restrictive layer is high. Available water to a depth of 60 inches (or restricted depth) is very low. Shrink-swell potential is low. This soil is rarely flooded. It is not ponded. There is no zone of water saturation within a depth of 72 inches. Organic matter content in the surface horizon is about 1 percent. This component is in the R067BY031 CO Sandy Bottomland ecological site. Nonirrigated land capability classification is 7s. Irrigated land capability classification is 4e. This soil does not meet hydric criteria. There are no saline horizons within 30 inches of the soil surface. Description Category: GENSOIL Ellicott sandy-skeletal, rarely flooded: 25 percent USDA Natural Resources Web Soil Survey 1/23/2026 Conservation Service National Cooperative Soil Survey Page 3 of 4 Component Text Descriptions--Weld County,Colorado,Southern Part The Ellicott sandy-skeletal, rarely flooded component makes up 25 percent of the map unit. Slopes are 0 to 3 percent. This component is on channels on intermittent streams on uplands, channels on drainageways on uplands. The parent material consists of noncalcareous, stratified sandy alluvium. Depth to a root restrictive layer is greater than 60 inches. The natural drainage class is excessively drained. Water movement in the most restrictive layer is high. Available water to a depth of 60 inches (or restricted depth) is very low. Shrink- swell potential is low. This soil is rarely flooded. It is not ponded. There is no zone of water saturation within a depth of 72 inches. Organic matter content in the surface horizon is about 1 percent. This component is in the R067BY031C0 Sandy Bottomland ecological site. Nonirrigated land capability classification is 8s. Irrigated land capability classification is 4s. This soil does not meet hydric criteria. There are no saline horizons within 30 inches of the soil surface. Description Category: GENSOIL Haverson: 10 percent Generated brief soil descriptions are created for major soil components. The Haverson soil is a minor component. Data Source Information Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 24, Aug 29, 2025 USDA Natural Resources Web Soil Survey 1/23/2026 Conservation Service National Cooperative Soil Survey Page 4 of 4 EXHIBIT J Vegetation Information The project site was surveyed for both general vegetation and for the presence of possible wetland areas by Ecological Resource Consultants (ERC). The upland habitat within the survey area consists predominantly of ruderal Weedy Forbs Great Plains Ruderal Forbland. Topography across the survey area is generally flat with a lower elevation area in the northwest corner and a topographic high point of 4,863 feet in the northeast portion of the survey area. The vegetation community characterized within the survey area has been affected by historic and current disturbance associated with oil and gas, mining practices, and agriculture. Therefore, existing upland vegetation within the survey area represents somewhat degraded forms of these natural vegetation associations, dominated by non-native or invasive grass and forb species such as cheatgrass, Scotch cottonthistle, lambsquarters, field bindweed, and kochia. Hydric soils, a dominance of hydrophytic vegetation, and/or wetland hydrology were not present in the upland habitats within the survey area. ERC's wetland delineation report is attached which includes descriptions of the general vegetation found on the site and wetlands found in the area. Note that none of the wetlands found on the site per the ERC report will be disturbed with the proposed mining for the site. The weed control plan for the site will be as follows and will be discussed and revised if needed by meeting with Tina Booton who is with Weld County's Weed Division: Mechanical and Chemical Control — Mowing will occur throughout the growing season in order to keep the plants from going to seed. Mowing will be terminated in late August followed by a herbicide treatment during late September through October— before a hard frost. Where controls cause vegetation to be removed, re-seeding will occur with native grass specified for the area per Weld County's recommendations and the re-seeding will occur the season after the weed control measures have been implemented. Chemical Control Only—A herbicide application will be applied from rosette to bud stage. This will be followed up with a fall application, if needed. The applicator (licensed if required by law for the type of herbicide) must read the label and use a herbicide labeled for the weeds present at the site. Noxious weed species to be managed are defined as those plant species currently identified by the Colorado State Department of Agriculture (CDA) as noxious under the Colorado Noxious Weed Act. The list is often updated and available at: https://www.colorado.gov/pacific/agconservation/noxious-weed-species Management efforts will be directed to those species identified under List A or List B by the CDA. List A species are required to be eradicated, while List B species will be controlled. Efforts to address List C species will follow guidelines of the Weld County Public Works Weed Management Division. • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application O l �T,�� 1 Sjf. lanClaTIO C MEL: t MI MC 2820 Wilderness Place,Suite A Boulder,CO 180301 I (303) 679-4820 AQUATIC RESOURCE DELINEATION REPORT FOR NCCI PIT #1 EXPANSION AREA WELD COUNTY, COLORADO MAY 30, 2025 Prepared For: J&T Consulting, Inc. Contact:JC York, P.E. Phone: (303)857-6222 Email:jcyork@j-tconsulting.com ERC Project#420-2501 NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report EXECUTIVE SUMMARY Project Name NCCI Pit#1 Expansion Area Applicant/Owner J&T Consulting, Inc. Survey Area Size(Acres) 67.3 acres County, State Weld, Colorado 1987 Corps of Engineers Wetlands Delineation Manual Regional Supplement to the Corps of Engineers Wetland Delineation Methodology Manual: Great Plains Region (Version 2.0) 2022 National Ordinary High Water Mark Field Delineation Manual for Rivers and Streams, Interim Version Summary of Findings Aquatic Resources Linear Connectivity treaName (aches) Feet Classification' Description SO dery 2 (Yes/No) Irrigation Ditch 0.38 N/A (Meadow Island A 1,677 Ditch 1) 1 Yes 0.13 Rp1EM Emergent Wetland Fringe B 0.40 1,466 N/A Irrigation Ditch 1 Yes C 2.10 - PEM1C Emergent Wetland N/A Yes Emergent Wetland D 0.05 100 PEM1A within an Irrigation N/A Yes Ditch 0.16 R2UBH Lower Perennial Stream E 353 3 Yes 0.14 Rp1EM Riparian Wetlands Total 3.36 3,596 -- -- -- -- Note:All areas investigated in the field are mapped on the enclosed Aquatic Resource Delineation Map (Appendix A). 1 Habitat Type based on Cowardin et al. 1979. 2 Connectivity Yes=Direct surface connection to other Waters of the US identified. No=No direct surface connection to other Waters of the US identified. ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report CONTENTS 1.0 Introduction 1 2.0 Survey Area Location 1 3.0 Methodology 4 4.0 Existing Conditions 5 4.1 Landscape Setting 5 4.2 Aquatic Resources 8 Aquatic Resource A(0.51 acres) (1,677 Linear Feet) 8 Aquatic Resource B (0.13 acre) (1,466 Linear Feet) 9 Aquatic Resource C(2.1 acres) 10 Aquatic Resource D (0.05 acre) (100 Linear Feet) 11 Aquatic Resource E (0.30 acre) (353 Linear Feet) 12 4.3 Upland Habitat 13 4.4 Plant Species Identified in the Survey Area 14 4.5 Aquatic Resource Connectivity Assessment 15 5.0 References 18 APPENDIX A Aquatic Resource Delineation Map APPENDIX B ERC Wetland Determination Data Forms APPENDIX C ERC Ordinary High Water Mark(OHWM) Data Forms ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report 1.0 INTRODUCTION This report summarizes the delineation of aquatic resources completed by Ecological Resource Consultants, LLC(ERC)on behalf of J&T Consulting, Inc.for the NCCI Pit#1 Expansion Area Project(survey area).This report documents aquatic resource boundary determinations for verification and jurisdictional review by the US Army Corps of Engineers (USACE), Omaha District Denver Regulatory Office. Project Contact information _ Applicant/Owner Representative Company Name J&T Consulting, Inc. Ecological Resource Consultants, LLC Contact Name JC York, P.E. Natalie Rothman Address 305 Denver Ave., Suite D 2820 Wilderness Place,Suite A Fort Lupton, CO 80621 Boulder, CO 80301 Phone (303) 857-6222 303-679-4820 x116 Email = icyork@j-tconsulting.com natalie@erccolorado.net 2.0 SURVEY AREA LOCATION State Colorado County Weld County Parcel#s 131124003001 Nearest Town Fort Lupton Street Address/ Nearest 0.6 mile north of the intersection of CR 25 and CR 18 Intersection Latitude, Longitude (Center of Survey 40.128299° N, -104.833465°W Area) Section, Section 24,Township 2 North, Range 67 West Township, Range Take CO-470 west towards 1-70 for 13 miles.Take Exit 1 for 1-70 East and continue for Direction from approximately 9.3 miles.Take Exit 269B onto 1-76 towards Fort Morgan and continue Denver for 12 miles.Take Exit 12 for US-85 North towards Greeley. Continue north on US-85 Regulatory for 17 miles then turn left onto Co Rd 18. Continue for 1.1 mile,then turn right onto Office Co Rd 25. After 0.6 mile and once the fencing on the left ends, a dirt road entrance to the survey area will be on the left. Refer to Figures 1 and 2 for a U.S. Geological Survey(USGS)topographic location map of the survey area and a Natural Resources Conservation Survey(NRCS) Web Soil Survey Map. 1 AERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report -- 1 - — ._ 6 \ n 1 LEGEND 0 n\ 0 Survey Area u u * Approximate Location . ('-- i 18 w DSO 111111H-)ei \ � f\ Vollm •:. .fit :52 48549 886 i- r .11 o % tr 1 a86S • J ( N.,. , 4411.96A '' d'-. (i0 1 ' Q tt \\ R \\ 19 _ Z ' , ',, \\Sx-4 —::::-.\. . cc gt,:tizf,;•&:/,, 4,. { 0 11 19 .4 % \''' \ . i. / • . Fort Collins O Greeley Ol r,//1 N' O \ Lli i11J17 � Siphon . r -. - ``44 spy, Hilt 1 aoul S; t ty C , � • • O .\\. • Prepared By: N FIGURE 1 tl; A ERC USGS TOPOGRAPHIC AND LOCATION MAP 2820 Wilderness Place,Suite A 0 500 1,000 2,000 Boulder,CO80301 NCCI PIT#1 EXPANSION AREA Feet {303)679-4820 WELD COUNTY, COLORADO ERC#:420-2501 2 AkERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report III �tiyL 'N 9 _._____ 9 „10.,.. _ I L y Rl 6 t. I ` M 1 l it Figure 2. NRCS Web Soil Survey Map Map Unit Map Unit Name Acres Hydric soil Symbol (+/-) (Yes/No)3 1 Altvan loam, 0 to 1 percent slopes 7.5 No 3 Aquolls and Aquents, gravelly substratum 59.8 Yes 3 Hydric(Yes/No)—obtained from the USDA State Soil Data Access(SDA) Hydric Soils List 3 ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report 3.0 METHODOLOGY The aquatic resource delineation was conducted following the methodology enumerated in the 1987 Corps of Engineers Wetlands Delineation Manual and the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Great Plains Region (Version 2.0) (herein referred to as "Supplement") (Environmental Laboratory 1987, USACE 2010). During the field inspection, dominant vegetation was recorded, representative hydrologic indicators were noted, and soil samples were examined for hydric indicators. The USACE and the Environmental Protection Agency (EPA)jointly define wetlands as: "those areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support, and under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions" [40 CFR 230.3(t)]. Three general environmental parameters define a wetland. These parameters must include the presence of hydrophytic vegetation, hydric soils, and wetland hydrology. Except under certain situations,evidence of a minimum of one positive wetland indicator from each of the above parameters must be identified in order to make a positive wetland determination. In addition, non-wetland aquatic resources can include "essentially all surface waters such as rivers, streams and their tributaries, all wetlands adjacent to these waters, and all ponds, lakes and reservoirs". The boundaries of some WOTUS (i.e., such as streams or lakes) are further defined by the ordinary high- water mark(OHWM).The OHWM is characterized as"that line on the shore established by the fluctuations of water and indicated by physical characteristics such as [a] clear, natural line impressed on the bank, shelving, changes in the character of soil, destruction of terrestrial vegetation, the presence of litter and debris, or other appropriate means that consider the characteristics of the surrounding areas" (USACE 2022).These definitions are the basis of this delineation method. Areas that do not meet any one of the wetland parameters (hydrophytic vegetation, hydric soils and/or wetland hydrology) or non-vegetated stream channel/open water (OHWM) were classified as a non- wetland (upland) and mapped as such. Any area determined to be potential WOTUS was delineated in the field pink flags identified with 'WETLAND BOUNDARY' printed on it and sequentially labeled alpha-numerically (i.e., Al, A2...). Each wetland determination point was recorded using a hand-held Trimble GeoXH global positioning system (GPS) receiver. The resulting GPS data were post-processed using GPS Pathfinder Office 5.85 software. Post-processing differential correction provided an average horizontal mapping accuracy of+/- 2 feet. Post-processed GPS data were imported into ArcMap Geographic Information Systems (GIS) (Version 10.6) for spatial analysis and mapping. All aquatic resources delineated within the survey area are depicted on the Aquatic Resource Delineation Map in Appendix A.Wetland Determination data sheets are provided in Appendix B and OHWM sheets in Appendix C. 4 ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report 4.0 EXISTING CONDITIONS 4.1 LANDSCAPE SETTING Average Elevation 4,856 (Feet AMSL) Topography Generally flat Subregion (LRR) LRR G Watershed HUC Mose Davis Lake-South Platte River watershed -101900030603 Nearest Waterbody Meadow Island Ditch Number 1 Current Landuse Agriculture, oil and gas facilities, and vacant land Historic Landuse Agriculture, oil and gas facilities, and vacant land Dominant Vegetation Weedy Forbs Great Plains Ruderal Forbland; Great Plains Saltgrass Saline Communities Wet Meadow; Disturbed Reference (NatureServe 2025) General Vegetation The majority of the survey area is primarily Weedy Forbs Great Plains Ruderal Description Forbland and Disturbed, dominated by invasive forbs as a result of current and past disturbances associated with agricultural practices and oil and gas activities.The disturbed areas include the 3 oil and gas facilities and the dirt roads along the southern boundary and bisecting the center of the survey area.The Weedy Forbs Great Plains Ruderal Forblands are the majority of the survey area, dominated by field bindweed (Convolvulus arvensis) and la mbsquarters(Chenopodium album). In the northwestern portion of the survey area is an unnamed creek and wetland floodplain, where species such as Northwestern territory sedge (Carex utriculata), broadleaf cattail (Typha latifolia), saltgrass (Distichlis spicata) and Baltic rush (Juncus balticus) dominate the low lying area. This section is considered to be in the Great Plains Saltgrass Saline Wet Meadow. Vegetation Community Weedy Forbs Great Plains Ruderal Forbland Description(s) Stands occur on a variety of open disturbed habitats, including pastures, ditches, bottomlands, and waste areas. The vegetation is dominated by medium-tall (0.5-1 m) forbs. In semi-arid and arid regions, sites tend to be relatively mesic. Native species are generally less than 10% cover. Native species may include mixed-grass prairie grasses. In semi-arid and arid regions, sites tend to be relatively mesic and include many mesic species such as Carex utriculata and Juncus arcticus ssp. littoralis (= Juncus balticus). Other introduced species include Bromus inermis, Phalaris arundinacea, Rumex crispus, Thlaspi arvense, and Verbascum thapsus. Great Plains Saltgrass Saline Wet Meadow This alliance occurs throughout the Great Plains where saline soils create conditions suitable for it. Dominant vegetation is a mixture of short and mid grasses and can have moderately sparse to dense cover. Vegetation height and cover and species diversity tend to vary inversely with salinity. Saltgrass (Distichlis spicata) is the most abundant species in stands across the range of 5 ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report this alliance. Widely scattered low shrubs, such as kochia (Bassia scoparia), can be present. Trees are not found. Disturbed These areas are defined by some form of human alteration or management, including barren grounds associated with oil and gas related activities,closely cropped vegetation such as lawns and landscaping, and urban materials such as buildings and pavement. Tree canopy varies from 0 to 50% (e.g., open to shaded lawns and gardens). Notable Features Meadow Island Ditch Number 1, unnamed creek in the northwest portion of the survey area Dates of Field Work May 14 and 15, 2025 Weather Partly cloudy, 50-70°F Typical Climatic/Hydrologic Normal precipitation conditions for the time of year(USACE 2025). Condition 6 ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report Refer to Photos 1-6 below for general characteristics of the survey area. 1111.1111.1111111110 • Photo 1. Overview facing northeast from the center of the Photo 2.View facing west from the eastern boundary,showing survey area, showing the general upland habitat of field the concrete-lined irrigation ditch and dirt road bisecting the bindweed(Convolvulus arvensis). survey area. 1.y • Photo 3. View facing northwest in the central portion of the Photo 4.View west from the southeast corner of the southern survey area. portion of the survey area,characterized by upland fields. • � . - i.:a � � �a�� 1 • Photo 5.View facing southeast showing the low-lying wetland Photo 6.View facing south (upstream)of the irrigation ditch, area in the northwest portion of the survey area. Meadow Island Ditch Number 1,located across the northeast portion of the survey area. 7 ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report 4.2 AQUATIC RESOURCES Delineated aquatic resources were classified according to the physical and biological characteristics using the Classification of Wetlands and Deepwater Habitat of the United States(Cowardin Classification System) (Cowardin et al. 1979). Within the survey area, wetland habitat types were classified based on field evaluation and are summarized in Table 1. Table 1. Summary of Aquatic Resources Delineated Within the Survey Area Aquatic Classification Linear Resource 4Cowardin Location Oat/long) Acres Feet Feature Type Name Classification N/A 40.129367°N, -104.8322°W 0.38 Irrigation Ditch (Meadow Island Ditch 1) A 1,677 Rp1EM 40.130079°N,-104.83286°W 0.13 Emergent Riparian Wetland B N/A 40.12742°N, -104.836237°W 0.40 1,466 Irrigation Ditch C PEM1C 40.130383°N, -104.835413°W 2.10 - Emergent Wetland D PEM1A 40.130093°N, -104.836566°W 0.05 100 Emergent Wetland R2UBH 40.130492°N, -104.836287°W 0.16 Lower Perennial Stream E 353 Emergent Riparian Rp1EM 40.130487°N, -104.83621°W 0.14 Wetland Total 3.36 3,596 A total of 3.36 acres(3,596 linear feet)of aquatic resources were delineated by ERC within the survey area. A description of aquatic resource habitat types is provided below.The Aquatic Resource Delineation Map is provided in Appendix A.Wetland Determination data sheets are provided in Appendix B. Refer to Table 2 for a list of plant species identified within the survey area (Lichvar et al. 2016). AQUATIC RESOURCE A (0.51 ACRES) (1,677 LINEAR FEET) Aquatic Resource A is an irrigation ditch excavated in uplands with emergent riparian wetland (Rp1EM) habitats in the eastern portion of the survey area. Aquatic Resource A collects hydrology from irrigation flows upstream. Surface water was observed at the time of the delineation.Aquatic Resource A has a direct downstream surface connection to the unnamed creek (Aquatic Resource E) downstream of the survey area and then the South Platte River, a traditional navigable waterway(TNW). Aquatic Resource A was delineated according to both the OHWM and wetland criteria - the presence hydrology, hydrophytic vegetation and hydric soils. 4 Habitat Type based on Cowardin et al.1979. 8 A ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report Overall, the vegetation community within Aquatic Resource A is dominated by species such as meadow foxtail (Alopecurus pratensis) and curly dock (Rumex crispus). The dominant species within the wetland area consist primarily of hydrophytic species (OBL-FAC). Soils within Aquatic Resource A are sandy in texture, exhibiting hydric soil indicator S5 (Sandy Redox). At the time of the delineation, primary wetland hydrology indicators A2 (High Water Table at 5 inches), A3 (Saturation at 0 inches), B7(Inundation Visible on Aerial Imagery),and C3 (Oxidized Rhizospheres on Living Roots) were observed. Secondary indicators B10 (Drainage Patterns) and D5 (FAC-Neutral Test) were also observed. Aquatic Resource A meets the criteria for a wetland based on the presence of hydrophytic vegetation, hydric soils, and wetland hydrology. Aquatic Resource A comprises a total of 0.51 acres (1,677 linear feet) of irrigation ditch excavated in uplands with emergent riparian wetland (Rp1EM) fringe habitats within the survey area (Appendix A). Refer to Photos 7-8 below for characteristics within Aquatic Resource A. k, ,. , .441 . . „,i. .11, 4t42'.'•"-Z).- . '''',.--TT-PA --- -';',17.0"-: —.14.;,,, -: '1-7' easiwass_ted... ________,.,,,,,,. , ,,,, .r_."0,.-- r.',Y '',:-,' Feli ,, „v. , i 14 ,,t,.,441140,,,t,,, ,,, „, 14,0011r Ry �'t a r` 1^ �e p9 .c t Ord r 4 i• a 4: .''-.'i• i it % a} r..w 1, ��,, a'*.- Y it ' , ikt,. ''...;-',:,—,4"7.10 ;,.,:t.:,1:,(:,;31.t. .'t l' ',,, :14, ';‘:,:4,:,,/,`,::7,,'-'- 'i;._,,.,'':0 :ail 4.u} /fix ..1 '";.^ n '}Zia P., r� _J a, ; r ` Y Photo 7.View facing south(upstream)of the southern portion Photo 8. View facing southeast of the downstream end of of Aquatic Resource A, which conveys flow from upstream Aquatic Resource A, near the northern boundary of the survey within the irrigation ditch.The OHWM is depicted by the blue area. Aquatic Resource A continues to flow north offsite and line. eventually into South Platte River. The riparian wetland boundary is depicted by the pink line and OHWM by the blue line. AQUATIC RESOURCE B (0.13 ACRE) (1,466 LINEAR FEET) Aquatic Resource B is an irrigation ditch excavated in uplands along the western boundary of the survey area. Aquatic Resource B collects hydrology from irrigation flows upstream. Surface water was observed at the time of the delineation. Aquatic Resource B has a direct downstream surface connection to Aquatic Resource E on the adjoining property to the west of the survey area and the South Platte River, a TNW. Aquatic Resource B was delineated according to OHWM,shown by the break in slope,vegetation transition from unvegetated to graminoids, and wracking of litter. Aquatic Resource B comprises a total of 0.13 acre (1,466 linear feet) of an irrigation ditch excavated in uplands within the survey area(Appendix A). Refer to Photos 9-10 below for characteristics within Aquatic Resource B. 9 ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report .4 r tf �o t f t._ `aE •, ,� n el a n r S' ;W 1 e ti $ :r , LY�pF 'if9 ,✓ 71, 17 °s_ .:m sa " ' 4 '. i .�, r,t c , ,"a j3� ki, Iii any T` 3° k*4 1 , - Q' V,+c ,��,q5,1�1.41�'IF� 3' aP 4yY,y� ,'y/ '" E ]�-:i e t, fv(em> +t P4�. vac• y'6 fa�5 ''f .1 " . q ', ' ,{k+a4 —''' N t` 1z f -; . -,;.'. . s r,. ,3' - 4 ' ';', T' '' , ate'- } ,. G. `m:. � " �„.: r '� r i 1 y'i 1 f 3v f ''. 4 ' ' �4,tJ'L � ft,' - a '' ,<`` . __ `inkylzkiit w • " t,9 �' Photo 9.View facing north (downstream) of Aquatic Resource Photo 10.View facing south (upstream)of Aquatic Resource B,an irrigation ditch along the western boundary of the survey B.The OHWM is depicted by the blue line. area, which conveys flow to Aquatic Resource E and then the South Platte River.The OHWM is depicted by the blue line. AQUATIC RESOURCE C (2.1 ACRES) Aquatic Resource C is comprised of a seasonally flooded emergent wetland (PEM1C) habitat in the northwest portion of the survey area. Aquatic Resource C collects hydrology from surface water runoff from surrounding irrigation, precipitation events, and high water flows from the unnamed creek in the northwest corner of the survey area. Surface water was observed at the time of the delineation. Aquatic Resource C has a direct downstream surface connection to Aquatic Resource E and the South Platte River, a TNW. Aquatic Resource C was delineated according to wetland criteria - the presence hydrology, hydrophytic vegetation and hydric soils. Overall,the vegetation community within Aquatic Resource C are dominated by species such as Baltic rush (Juncus balticus), saltgrass (Distichlis spicata), and northwest territory sedge (Carex utriculata). The dominant species within the wetland area consist of hydrophytic species (OBL-FACW). Soils within Aquatic Resource C are comprised of loam/clay to sandy textures, exhibiting hydric soil indicators All (Depleted Below Dark Surface), S5 (Sandy Redox), F3 (Depleted Matrix), and F8 (Redox Depressions). At the time of the delineation, primary wetland hydrology indicators A2 (High Water Table between 4-7 inches), A3 (Saturation between 0-2 inches), B4 (Algal Mat), B9 (Water-Stained Leaves), and C3 (Oxidized Rhizospheres on Living, Untilled Roots) were observed. Secondary indicators C9 (Saturation visible on aerial imagery), B10 (Drainage Patterns), D2 (Geomorphic Position), and D5 (FAC-Neural Test) were also observed. Aquatic Resource C meets the criteria for wetlands based on the presence of hydrophytic vegetation, hydric soils, and wetland hydrology. Aquatic Resource C comprises a total of 2.1 acres of emergent wetland habitat within the survey area (Appendix A). Refer to Photos 11-12 below for characteristics within Aquatic Resource C. 10 ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report ,rt 1 z 4 Photo 11. View facing east of Aquatic Resource C in the Photo 12. View facing west showing the eastern portion of northwestern region of the survey area.Aquatic Resource C,an Aquatic Resource C.The wetland boundary is depicted by the emergent wetland,is dominated by saltgrass(Distichlis spicata), pink line. Baltic rush (Juncus balticus), and northwest territory sedge (Carexutriculata).The wetland boundary is depicted by the pink line. AQUATIC RESOURCE D (0.05 ACRE) (100 LINEAR FEET) Aquatic Resource D is comprised of an emergent wetland (PEM1A) within an irrigation ditch in the northwest corner of the survey area. Aquatic Resource D collects hydrology from precipitation events and surface water runoff. Surface water was observed at the time of the delineation. Aquatic Resource D has a direct downstream surface connection to Aquatic Resource E and then the South Platte River, a TNW. Aquatic Resource D was delineated according to wetland criteria - the presence hydrology, hydrophytic vegetation and hydric soils. Overall, the vegetation community within Aquatic Resource D is dominated by species such as broadleaf cattail (Typha latifolia)and prairie cordgrass(Spartina pectinata).The dominant species within the Aquatic Resource D consist of hydrophytic species (OBL-FACW). Soils within Aquatic Resource D are comprised of mucky sand and sandy textures, exhibiting hydric soil indicators All (Depleted Below Dark Surface), S1 (Sandy Mucky Material), S5 (Sandy Redox), and S6 (Stripped Matrix). At the time of the delineation, primary wetland hydrology indicators A2 (High Water Table at 2 inches),A3 (Saturation at 0 inches),C3 (Oxidized Rhizospheres on Living, Untilled Roots),and C7 (Thin Muck Surface)were observed. Secondary indicator D5 (FAC-Neural Test)was also observed.Aquatic Resource D meets the criteria for wetlands based on the presence of hydrophytic vegetation, hydric soils, and wetland hydrology. Aquatic Resource D comprises a total of 0.05 acre(100 linear feet)of emergent wetland habitat within the survey area (Appendix A). Refer to Photos 13-14 below for characteristics within Aquatic Resource D. 11 ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report vA} ,may 4�+ k E s • Photo 13.View facing southwest of Aquatic Resource D in the Photo 14. View facing northeast of Aquatic Resource D, northwest region of the survey area. Aquatic Resource D is located in the northwest corner of the survey area. The dominated by broadleaf cattail (Typha latifolia). The wetland wetland boundary is depicted by the pink line. boundary is depicted by the pink line. AQUATIC RESOURCE E (0.30 ACRE) (353 LINEAR FEET) Aquatic Resource E is comprised of lower perennial riverine (R2UBH) habitat in the northwest portion of the survey area. Aquatic Resource E collects hydrology from upstream within the unnamed creek,surface water runoff,and groundwater. Surface water was observed at the time of the delineation. Aquatic Resource E has a direct downstream connection to the South Platte River, a TNW. Aquatic Resource E was delineated according to OHWM,shown by the break in slope,vegetation transition from unvegetated to graminoids, undercutting of the bank below, and vegetation matting or bent along the OHWM. Aquatic Resource E comprises a total of 0.30 acre (353 linear feet) of lower perennial riverine within the survey area (Appendix A). Refer to Photos 15-16 below for characteristics within Aquatic Resource E. yr • V "° fR' v � i \ I r a, K !r . t. ?h� a4y Photo 15.View facing north(downstream)of Aquatic Resource Photo 16.View facing west(upstream)showing the western E, a lower perennial creek and riparian wetlands in the portion of Aquatic Resource C.The OHWM is depicted by the northwest region of the survey area.The OHWM is depicted by blue line and wetland boundary by the pink line. the blue line and wetland boundary by the pink line. 12 ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report 4.3 UPLAND HABITAT The wetland delineation identified approximately 63.9 acres of upland habitat within the survey area consisting predominantly of ruderal Weedy Forbs Great Plains Ruderal Forbland. Topography across the survey area is generally flat with a lower elevation area in the northwest corner and a topographic high point of 4,863 feet in the northeast portion of the survey area. The vegetation community characterized within the survey area has been affected by historic and current disturbance associated with oil and gas, mining practices, and agriculture.Therefore, existing upland vegetation within the survey area represents somewhat degraded forms of these natural vegetation associations, dominated by non-native or invasive grass and forb species such as cheatgrass,Scotch cottonthistle, lambsquarters,field bindweed,and kochia. Hydric soils, a dominance of hydrophytic vegetation, and/or wetland hydrology were not present in the upland habitats within the survey area. Refer to Table 2 for a list of plant species identified within the survey area (Lichvar et al. 2016). 13 A ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report 4.4 PLANT SPECIES IDENTIFIED IN THE SURVEY AREA Table 2. Plant Species Identified in Survey Area Scientific Name Common Name WIS* Alopecurus pratensis Meadow Foxtail FACW Antennaria parvifolia Pussytoes UPL Asclepias speciosa Showy Milkweed FAC Bassia scoparia Kochia FACU Bromus inermis Smooth brome UPL Bromus tectorum Cheatgrass UPL Carex utriculata Northwest Territory Sedge OBL Chenopodium album Lambsquarters FACU Convolvulus arvensis Field Bindweed UPL Descurainia pinnata Western Tansy-Mustard UPL Descurainia sophia Flixweed UPL Distichlis spicata Saltgrass FACW Elaeagnus angustifolia Russian Olive FACU Juncus balticus Baltic Rush FACW Juncus compressus Round-fruited Rush FACW Onopordum acanthium Scotch Cottonthistle UPL Rumex crispus Curly Dock FAC Senecio vulgaris Common Groundsel FACU Spartina pectinata Prairie Cordgrass FACW Taraxacum officinale Dandelion FACU Thlaspi arvense Pennycress FACU Typha latifolia Broadleaf Cattail OBL Verbascum thapsus Common Mullein UPL *Wetland Indicator Status(WIS)—Great Plains Regions: OBL =occurs in aquatic resources>99%of time FACW =occurs in aquatic resources 67-99%of time FAC =occurs in aquatic resources 34-66%of time FACU =occurs in aquatic resources 1-33%of time UPL =occurs in uplands>99%of time WIS Source: Lichvar, R.W., D.L.Banks,W.N. Kirchner,and N.C. Melvin.2016. The National Wetland Plant List: 2016 wetland ratings. Phytoneuron 2016-30: 1-17. Published 28 April 2016.ISSN 2153 733X http://www.phytoneuron.net/ 14 A ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report 4.5 AQUATIC RESOURCE CONNECTIVITY ASSESSMENT Based on aerial imagery and EPA's National Hydrography Dataset Plus - Version 2, Aquatic Resources A (stream order 1), B (stream order 1), C(an emergent wetland) and D (stream order 1), all flow into Aquatic Resource E. Aquatic Resource E (stream order 3) conveys flow from upstream within the creek, groundwater, as well as surface water runoff from the survey area and surrounding land.Aquatic Resource E flows offsite and continues north for approximately 6 miles before flowing into the South Platte River (stream order 6), a traditional navigable water(TNW) (Figure 3). Table 3.Aquatic Resource Connectivity Assessment Connectivity to the Waters of the U.S. Aquatic Resource Endpoint& Resource Connectivity Path and Direction Feature Type Stream Stream Name Order(s) Order Aquatic Resource A conveys flow from upstream within the irrigation ditch, Irrigation Ditch (Meadow South A into Aquatic Resource E downstream Island Ditch 1) and 1 Platte River (north) of the survey area, and Emergent Wetland Fringe 6 ultimately,the South Platte River. Aquatic Resource B conveys flow from upstream within the irrigation ditch, South B into Aquatic Resource E downstream Irrigation Ditch 1 Platte River (west) of the survey area, and 6 ultimately,the South Platte River. Aquatic Resource C has a direct surface South C connection to Aquatic Resource E, and Emergent Wetland N/A Platte River ultimately, the South Platte River. 6 Aquatic Resource D collects surface South water runoff and groundwater and Emergent Wetland within D 1 Platte River conveys flow into Aquatic Resource E, an Irrigation Ditch 6 and ultimately, the South Platte River. Aquatic Resource E conveys flow from upstream within the creek and South Lower Perennial Creek with E downstream (north) of the survey area 3 Platte River Riparian Wetlands where it ultimately joins the South 6 Platte River, a TNW. 15 NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report LEGEND r Survey Area (91 ac) o ib. Stream Order i3b r'ti ' .1-41Mr:4 !Pg.. ':044`, , . '. $01. A7:-- M. L .•M c —w ,1y. ' ( �. . e to 7 .. -rl: - yew I a�— . �. Prepared By: N FIGURE 3 tt d D A ERC CONNECTIVITY & STREAM ORDER MAP 2820 Wilderness Place,Suite A Boulder,CO80301 NCCI PIT#1 EXPANSION AREA 0 0.25 0.5 1 Miles (303)679-4820 WELD COUNTY, COLORADO ERC#:420-2501 16 A ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report This report has been prepared by: ECOLOGICAL RESOURCE CONSULTANTS, LLC /Z�r ie Rothman,Staff Ecologist,WPIT (303) 679-4820 x116/ natalie@erccolorado.net Reviewed and approved by: Tyler Worley, ' r Ecologist,Certified Ecologist (303) 679-4820 x 105/tyler@erccolorado.net 17 ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report 5.0 REFERENCES Cowardin, L. M., V. Carter, F. C. Golet, and E. T. LaRoe. 1979. Classification of wetlands and deepwater habitats of the United States. FWS/OBS-79/31. USDI Fish & Wildlife Service, Office of Biological Services, Washington, DC. 103 pp. Environmental Laboratory. 1987 Corps of Engineers Wetlands Delineation Manual. Technical Report Y-87- 1, U.S.Army Corps of Engineer Waterways Experiment Station. Vicksburg, MS. Google Earth Imagery. 2025. Available online at https://www.google.com/earth/. May. Lichvar, R.W., D.L. Banks, W.N. Kirchner, and N.C. Melvin. 2016. The National Wetland Plant List: 2016 wetland ratings. Phytoneuron 2016-30: 1-17. Published 28 April 2016. ISSN 2153 733X NatureServe.2025. NatureServe Explorer Central Database. Ecological Association Comprehensive Report. Available online at: http://explorer.natureserve.org. May. Natural Resource Conservation Service (NRCS). 2025. Web Soil Survey. Soil Map. Available online at: https://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx. May. U.S. Army Corps of Engineers (USACE). 2010. USACE. Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Great Plains Region (Version 2.0), ed. J. S. Wakeley, R. W. Lichvar, and C.V. Noble. ERDC/EL TR-10-1.Vicksburg, MS: U.S.Army Engineer Research and Development Center. Available online at: http://www.usace.army.mil/Portals/2/docs/civilworks/regulatory/reg supp/gp supp.pdf U.S.Army Corps of Engineers(USACE). 2022. National Ordinary High Water Mark Field Delineation Manual for Rivers and Streams, Interim Version. ERDC/CRREL TR-22-26. Engineer Research and Development Center(U.S.). https://erdc-library.erdc.dren.mil/items/190ea825-622d-45ce-8709-93f8411daba0 U.S. Army Corps of Engineers (USACE). 2025. The Antecedent Precipitation Tool — V2.9.0 (APT). https://github.com/erdc/Antecedent-Precipitation-Tool/releases/tag/v2.9.0 18 ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report APPENDIX A - IL -_--:' 1111111- :7 -nip%/ • - " _, . ,Noof e vir7 ,44 ‘;X _ _ _ Aquatic • w Cowardin Linear Resource Classification Location(latflong) Feet Acres Feature Type ' - _ - - Name ' Irrigation Ditch Aquatic Resource E s 'r NM 40.129367°N,-104.8322°W 0.38 ' f- - A 1,677 Meadow Island Ditch 1 s - - _ _ . . . �.- a4 a' i . Rp1EM 40.130079°N,-104.83286°W 0.13 Emergent Wetland Fringe ). •• 0 0 0 "0 A21 -t,•�--� B NIA 40.12742°N,-104.836237°W 1,466 0.40 Irrigation Ditch i -0,• Q • Z-tl��!r C PEM1C 40.130383°N,-104.835413°W 2.10 Emergent Wetland Alai _•.• •".•••r��•�•a•� �' i�0' •4. O•;Q1• 916gif Emergent Wetland within ►'� A2s I D PEM1A 40.130093°N,-104.836566°W 100 0.05 •� - A2�an Irrigation Ditch •� AID•A3R2UBH 40-.130492°N,-104.836287°W 0.16 Lower Perennial Stream �� • - - Al3 :A32 ` E Rp1EM 40.130487°N,-104.83621°W 353 0.14 Riparian Wetlands •yc • •• • A14 �i3 Total 3,596 3.36 ••• • ' Aquatic Resource C A33 •• f-� Ur) _ 1s f, .. r Al2 w ••A35 * r !r 62: •----Aquatic Resource A i Beeb�1 SP-UP64 �I 61s6z3 AV •10 SP-UP5 �-wow_ Illa •B18 Aquatic Resource D A9 • -. I - •• ' A36 .46 ,it, B17 8g _ f MEM , , • • •A37 �. Aquatic Resource B 4, • . • a I t3.16.15 • i ' 83 SP-A1 W • - s" _ - - B1 SP-A1U*. c'� ` t r ,4• A5 ' , • : 4. j tip � • wa - .y el' _ .•Ili r ySP-UP >- A3 I ii (- �.� �,� _yl�`` ~� O _ �._ A2 1' i - ,f `''' `. rr Al � F. 0`° •, - �_:" C71 • -&- ••-0..`�• rIFIPO 4, - • * - ",�, 0• � A • 1 -C'LV'V' l7• • C,i s,• C4� C4fi.0_ ' C"l Le �r-.� - !." S ' C?L' C4"•t• 'INik, •�_ C' Cbi „ti SP-UP4 lL•• 77 �1' l�\'\' C ...lb C3i • / • - \ p CU*• C77O 0 NOTES: ✓ O `'2 }}�, 0 .+. - 1.THE SURVEY AREA IS LOCATED IN WELD COUNTY,COLORADO,SECTION 24,TOWNSHIP 2 12:C1,CI 2 )' O NORTH,RANGE 67 WEST . , 9 - _ 2.AQUATIC RESOURCE LOCATIONS WERE FIELD DELINEATED BY ERC ON MAY 14 AND 15, L", -I'-C 11,\, 1 a 0 • 2025,USING THE 1987 CORPS OF ENGINEERS WETLANDS DELINEATION MANUAL AND THE .,r REGIONAL SUPPLEMENT TO THE CORPS OF ENGINEERS WETLAND DELINEATION MANUAL; L ' r-� -u •. O GREAT PLAINS REGION(VERSION 2.0)(MARCH 2010). L't2 L., 3.THESE AREAS HAVE BEEN FIELD DELINEATED AND MAPPED WITH HAND-HELD SUB- DU 5 - SP-UP3 METER ACCURACY GLOBAL POSITIONING SYSTEM(GPS)EQUIPMENT(+/-2 FEET).AQUATIC 1• * - RESOURCE MAPPING WAS PREPARED BY ERC USING GEOGRAPHIC INFORMATION - SYSTEMS(GIS). • .1- 4. SATELLITE IMAGERY WAS OBTAINED FROM ESRI WORLD IMAGERY DATED APRIL 22,2023 o . ��'"�" 5. THE PROJECTED COORDINATE SYSTEM FOR THE AQUATIC RESOURCE DELINEATION O • - MAPPING IS:NAD1983STATEPLANE COLORADO NORTH FIPS0501 FEET . 1=-Li I'l• 6.REFER TO THE ERC AQUATIC RESOURCE DELINEATION REPORT(MAY 30,2025)FOR MORE DETAILED INFORMATION. Prepared By: LEGEND N 0 SurveyArea 0 Culvert Delineated Aquatic Resources OVERVIEW it ERC 0 Data Point Location & ID Flow Direction PEM1A AQUATIC RESOURCE DELINEATION MAP r D PEM1C 2820 Wilderness Place, Suite A 0 Field Flag Location & ID R2UBH 0 145 290 580 Boulder, CO 80301 NCCI PIT #1 EXPANSION AREA Feet 0 OHWM Point Location & ID Rp1 EM (303) 679-4820 ERC#:420-2501 Irrigation Ditch WELD COUNTY, COLORADO May 30, 2025 A ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report APPENDIX B U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/14/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-A1U Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): hillslope Local relief(concave,convex, none): concave Slope(%): 25 Subregion(LRR/MLRA): LRR G Lat: 40.128349° Long: -104.831377° Datum: North American1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: none Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes No X Is the Sampled Area Hydric Soil Present? Yes No X within a Wetland? Yes No X Wetland Hydrology Present? Yes No X Remarks: Upland sample plot,paired with wetland plot SP-A1W,on a hillslope into Meadow Island Ditch Number 1 in the eastern portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 0 (A) 3• Total Number of Dominant Species 4. Across All Strata: 2 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 0.0% (A/B) 1. 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 0 x 2= 0 =Total Cover FAC species 0 x 3= 0 Herb Stratum (Plot size: 5 ) FACU species 20 x 4= 80 1. Convolvulus arvensis 10 Yes UPL UPL species 20 x 5= 100 2. Bromus tectorum 5 No UPL Column Totals: 40 (A) 180 (B) 3. Bessie scoparia 20 Yes FACU Prevalence Index =B/A= 4.50 4. Descurainia sophia 5 No UPL 5. Hydrophytic Vegetation Indicators: 6. _1 -Rapid Test for Hydrophytic Vegetation 7. _2-Dominance Test is>50% 8. _3-Prevalence Index is.3.01 9. _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 40 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 60 Present? Yes No X Remarks: Dominant vegetation is representative of upland vegetation. Does not meet criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-A1U Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-6 10YR 5/3 100 Sandy Prominent redox concentrations 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) Histic Epipedon(A2) _Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) _Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and 2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: rock Depth(inches): 6 Hydric Soil Present? Yes No X Remarks: No soil indicators were observed. Large rocks presented a restrictive layer at 6",likely from lining of the irrigation ditch. Does not meet criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(Al) _Salt Crust(B11) _Surface Soil Cracks(B6) _High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) _Saturation(A3) _Hydrogen Sulfide Odor(C1) _Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) _Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) _Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) _Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) _FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes No X Depth(inches): Saturation Present? Yes No X Depth(inches): Wetland Hydrology Present? Yes No X (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: No hydrology indicators were observed. Does not meet criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/14/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-A1W Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): wetland fringe on irrigation ditch Local relief(concave,convex, none): concave Slope(%): <2 Subregion(LRR/MLRA): LRR G Lat: 40.128352° Long: -104.831357° Datum: North American1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: R4SBAx(excavated,intermittenldverme) Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes X No Is the Sampled Area Hydric Soil Present? Yes X No within a Wetland? Yes X No Wetland Hydrology Present? Yes X No Remarks: Wetland sample plot, paired with upland plot SP-A1 U,on a wetland fringe along Meadow Island Ditch Number 1 in the eastern portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 2 (A) 3• Total Number of Dominant Species 4. Across All Strata: 2 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 100.0% (A/B) 1. 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 50 x 2= 100 =Total Cover FAC species 20 x 3= 60 Herb Stratum (Plot size: 5 ) FACU species 10 x 4= 40 1. Rumex crispus 20 Yes FAC UPL species 15 x 5= 75 2. Alopecurus pratensis 50 Yes FACW Column Totals: 95 (A) 275 (B) 3. Bassia scoparia 10 No FACU Prevalence Index =B/A= 2.89 4. Bromus tectorum 5 No UPL 5. Verbascum thapsus 8 No UPL Hydrophytic Vegetation Indicators: 6. Onopordum acanthium 2 No UPL _1 -Rapid Test for Hydrophytic Vegetation 7. X 2-Dominance Test is>50% 8. X 3-Prevalence Index is.3.01 9. _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 95 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 5 Present? Yes X No Remarks: Dominant vegetation is representative of wetland vegetation. Meets criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-AlW Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-6 10YR 3/1 95 10YR 4/6 5 C PL Sandy Prominent redox concentrations 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) _Histic Epipedon(A2) X Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) _Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) _Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and _2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: rock Depth(inches): 6 Hydric Soil Present? Yes X No Remarks: Soil indicator S5(Sandy Redox)was observed with prominent redox concentrations from the soil surface. Large rocks presented a restrictive layer at 6", likely from lining the irrigation ditch. Meets criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(A1) _Salt Crust(B11) _Surface Soil Cracks(B6) X High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) X Saturation(A3) _Hydrogen Sulfide Odor(Cl) X Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) X Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) _Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) _Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) _Geomorphic Position(D2) X Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) X FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes X No Depth(inches): 5 Saturation Present? Yes X No Depth(inches): 0 Wetland Hydrology Present? Yes X No (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: Primary indicators A2(Water Table at 5"),A3(Saturation at 0"), B7(inundation on aerial imagery),and C3(Oxidized Rhizospheres)were all observed,as well as secondary indicators, B10(Drainage Patterns)and D5(FAC-neutral test). Meets criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/15/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-C1U Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): hillslope Local relief(concave,convex, none): concave Slope(%): 3 Subregion(LRR/MLRA): LRR G Lat: 40.129942° Long: -104.836394° Datum: North American1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: none Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes No X Is the Sampled Area Hydric Soil Present? Yes No X within a Wetland? Yes No X Wetland Hydrology Present? Yes No X Remarks: Upland sample plot,paired with wetland plot SP-C1W,on a hillslope into the wetland flat/floodplain of the unnamed creek in the northwest portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 0 (A) 3. Total Number of Dominant Species 4. Across All Strata: 3 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 0.0% (A/B) 1. Bassia scoparia 30 Yes FACU 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 0 x 2= 0 30 =Total Cover FAC species 5 x 3= 15 Herb Stratum (Plot size: 5 ) FACU species 90 x 4= 360 1. Onopordum acanthium 10 No UPL UPL species 35 x 5= 175 2. Bromus inermis 10 No UPL Column Totals: 130 (A) 550 (B) 3. Bassia scoparia 50 Yes FACU Prevalence Index =B/A= 4.23 4. Chenopodium album 5 No FACU 5. Elaeagnus angustifolia 5 No FACU Hydrophytic Vegetation Indicators: 6. Convolvulus arvensis 15 Yes UPL _1 -Rapid Test for Hydrophytic Vegetation 7. Asclepias speciosa 5 No FAC _2-Dominance Test is>50% 8. _3-Prevalence Index is.3.01 9. _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 100 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 0 Present? Yes No X Remarks: Dominant vegetation is representative of upland vegetation. Does not meet criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-C1U Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-4 10YR 2/2 100 Sandy Prominent redox concentrations 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) Histic Epipedon(A2) _Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) _Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) _Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and _2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: rock Depth(inches): 4 Hydric Soil Present? Yes No X Remarks: No soil indicators were observed. Large gravel/rocks presented a restrictive layer at 4". Does not meet criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(Al) _Salt Crust(B11) _Surface Soil Cracks(B6) _High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) _Saturation(A3) _Hydrogen Sulfide Odor(C1) _Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) _Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) _Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) _Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) X Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) _FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes No X Depth(inches): Saturation Present? Yes No X Depth(inches): Wetland Hydrology Present? Yes No X (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: Secondary indicator D2(Geomorphic Position)was observed. Does not meet criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/15/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-C1W Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): wetland flat Local relief(concave,convex, none): concave Slope(%): 0 Subregion(LRR/MLRA): LRR G Lat: 40.129969° Long: -104.836416° Datum: North American1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: PEM1C(Emergent Wetland) Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes X No Is the Sampled Area Hydric Soil Present? Yes X No within a Wetland? Yes X No Wetland Hydrology Present? Yes X No Remarks: Wetland sample plot, paired with upland plot SP-C1 U, in a wetland flat in the floodplain of the unnamed creek in the northwestern portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 2 (A) 3• Total Number of Dominant Species 4. Across All Strata: 2 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 100.0% (A/B) 1. 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 90 x 2= 180 =Total Cover FAC species 0 x 3= 0 Herb Stratum (Plot size: 5 ) FACU species 5 x 4= 20 1. Juncus balticus 50 Yes FACW UPL species 5 x 5= 25 2. Distichlis spicata 30 Yes FACW Column Totals: 100 (A) 225 (B) 3. Elaeagnus angustifolia 2 No FACU Prevalence Index =B/A= 2.25 4. Convolvulus arvensis 5 No UPL 5. Alopecurus pratensis 10 No FACW Hydrophytic Vegetation Indicators: 6. Taraxacum officinale 3 No FACU _1 -Rapid Test for Hydrophytic Vegetation 7. X 2-Dominance Test is>50% 8. X 3-Prevalence Index is.3.0' 9. _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 100 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 0 Present? Yes X No Remarks: Dominant vegetation is representative of wetland vegetation. Meets criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-C1W Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-2 10YR 2/2 98 10YR 4/6 2 C PL Loamy/Clayey Prominent redox concentrations 2-8 10YR 5/2 95 10YR 4/6 5 C PL/M Loamy/Clayey Prominent redox concentrations 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) _Histic Epipedon(A2) _Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) X Depleted Matrix(F3) Very Shallow Dark Surface(F22) X Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) X Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and 2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: gravel/rock Depth(inches): 8 Hydric Soil Present? Yes X No Remarks: Soil texture is gravelly loam.Soil indicators F3(Depleted Matrix)and F8(Redox Depressions)were observed with prominent redox concentrations from the soil surface. Large rocks presented a restrictive layer at 8". Meets criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(Al) _Salt Crust(B11) _Surface Soil Cracks(B6) X High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) X Saturation(A3) _Hydrogen Sulfide Odor(Cl) _Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) X Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) X Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) _Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) X FAC-Neutral Test(D5) X Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes X No Depth(inches): 6 Saturation Present? Yes X No Depth(inches): 0 Wetland Hydrology Present? Yes X No (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: Primary indicators A2(Water Table at 6"),A3(Saturation at 0"),and C3(Oxidized Rhizospheres)were all observed,as well as secondary indicators C9(saturation on aerial imagery)and D5(FAC-neutral test). Meets criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/15/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-C2U Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): field Local relief(concave,convex, none): concave Slope(%): 5 Subregion(LRR/MLRA): LRR G Lat: 40.130487° Long: -104.834151° Datum: North American 1983 Soil Map Unit Name: Altvan loam,0 to 1 percent slopes NWI classification: none Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes No X Is the Sampled Area Hydric Soil Present? Yes X No within a Wetland? Yes No X Wetland Hydrology Present? Yes No X Remarks: Upland sample plot,paired with wetland plot SP-C2W, located in a field in the northern portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 1 (A) 3• Total Number of Dominant Species 4. Across All Strata: 2 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 50.0% (A/B) 1. 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 33 x 2= 66 =Total Cover FAC species 2 x 3= 6 Herb Stratum (Plot size: 5 ) FACU species 45 x 4= 180 1. Distichlis spicata 33 Yes FACW UPL species 20 x 5= 100 2. Antennaria parvifolia 15 No UPL Column Totals: 100 (A) 352 (B) 3. Bassia scoparia 45 Yes FACU Prevalence Index =B/A= 3.52 4. Onopordum acanthium 5 No UPL 5. Rumex crispus 2 No FAC Hydrophytic Vegetation Indicators: 6. _1 -Rapid Test for Hydrophytic Vegetation 7. _2-Dominance Test is>50% 8. _3-Prevalence Index is.3.01 9. _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 100 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 0 Present? Yes No X Remarks: Dominant vegetation is representative of upland vegetation. Does not meet criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-C2U Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-3 10YR 2/1 99 10YR 5/6 1 C M Loamy/Clayey Prominent redox concentrations 3-7 10YR 2/1 70 10YR 5/8 30 C M Loamy/Clayey Prominent redox concentrations 7-15 10YR 2/1 60 10YR 5/8 40 C M Loamy/Clayey Prominent redox concentrations 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) Histic Epipedon(A2) _Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) _Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) X Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) X Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and _2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: Depth(inches): Hydric Soil Present? Yes X No Remarks: Soil indicators F6(Redox Dark Surface)and F8(Redox Depressions)present,assumedly from flood irrigation and wetland overflow. Meets criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(Al) _Salt Crust(B11) _Surface Soil Cracks(B6) _High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) _Saturation(A3) _Hydrogen Sulfide Odor(C1) _Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) _Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) _Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) _Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) X Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) _FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes No X Depth(inches): Saturation Present? Yes No X Depth(inches): Wetland Hydrology Present? Yes No X (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: Secondary indicator D2(Geomorphic Position)was observed. Does not meet criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/15/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-C2W Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): wetland flat Local relief(concave,convex, none): concave Slope(%): <2 Subregion(LRR/MLRA): LRR G Lat: 40.130515° Long: -104.834143° Datum: North American1983 Soil Map Unit Name: Altvan loam,0 to 1 percent slopes NWI classification: PEM1C(Emergent Wetland) Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes X No Is the Sampled Area Hydric Soil Present? Yes X No within a Wetland? Yes X No Wetland Hydrology Present? Yes X No Remarks: Wetland sample plot, paired with upland plot SP-C2U, in a wetland flat within the floodplain of the unnamed creek in the northwestern portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 1 (A) 3. Total Number of Dominant Species 4. Across All Strata: 1 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 100.0% (A/B) 1. 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 90 x 2= 180 =Total Cover FAC species 0 x 3= 0 Herb Stratum (Plot size: 5 ) FACU species 0 x 4= 0 1. Distichlis spicata 90 Yes FACW UPL species 0 x 5= 0 2. Column Totals: 90 (A) 180 (B) 3. Prevalence Index =B/A= 2.00 4. 5. Hydrophytic Vegetation Indicators: 6. _1 -Rapid Test for Hydrophytic Vegetation 7. X 2-Dominance Test is>50% 8. X 3-Prevalence Index is.3.0' 9. 4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 90 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 10 Present? Yes X No Remarks: Dominant vegetation is representative of wetland vegetation. Meets criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-C2W Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-2 10YR 3/2 95 10YR 5/6 5 C PL Loamy/Clayey Prominent redox concentrations 2-7 10YR 3/2 90 10YR 5/6 10 C PL/M Sandy Prominent redox concentrations 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) _Histic Epipedon(A2) X Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) _Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) X Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and _2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: gravel/rock Depth(inches): 7 Hydric Soil Present? Yes X No Remarks: Soil indicators S5(Sandy Redox)and F8(Redox Depressions)were observed with prominent redox concentrations from the soil surface. Large rocks presented a restrictive layer at 7". Meets criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(A1) _Salt Crust(B11) _Surface Soil Cracks(B6) X High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) X Saturation(A3) _Hydrogen Sulfide Odor(Cl) X Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) _Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) X Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) X Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) X Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) X FAC-Neutral Test(D5) X Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes X No Depth(inches): 7 Saturation Present? Yes X No Depth(inches): 2 Wetland Hydrology Present? Yes X No (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: Indicators A2(Water Table at 7"),A3(Saturation at 2"), B4(Algal mat),and B9(Water-stained leaves)were all observed,as well as secondary ones B10(Drainage patterns),C9(saturation in imagery), D2(Geomorphic position)and D5(FAC-neutral). Meets criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/15/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-C3U Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): upland pocket Local relief(concave,convex, none): convex Slope(%): 2-3 Subregion(LRR/MLRA): LRR G Lat: 40.130446° Long: -104.836066° Datum: North American1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: none Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes No X Is the Sampled Area Hydric Soil Present? Yes X No within a Wetland? Yes No X Wetland Hydrology Present? Yes No X Remarks: Upland sample plot,paired with wetland plot SP-C3W, located on an upland pocket between the wetland and unnamed creek in the northwest portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 0 (A) 3• Total Number of Dominant Species 4. Across All Strata: 2 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 0.0% (A/B) 1. 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 10 x 2= 20 =Total Cover FAC species 5 x 3= 15 Herb Stratum (Plot size: 5 ) FACU species 55 x 4= 220 1. Chenopodium album 5 No FACU UPL species 20 x 5= 100 2. Spartina pectinata 10 No FACW Column Totals: 90 (A) 355 (B) 3. Bassia scoparia 50 Yes FACU Prevalence Index =B/A= 3.94 4. Onopordum acanthium 20 Yes UPL 5. Rumex crispus 5 No FAC Hydrophytic Vegetation Indicators: 6. _1 -Rapid Test for Hydrophytic Vegetation 7. _2-Dominance Test is>50% 8. _3-Prevalence Index is.3.01 9. _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 90 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 10 Present? Yes No X Remarks: Dominant vegetation is representative of upland vegetation. Does not meet criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-C3U Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-6 10YR 3/2 50 10YR 5/6 2 C M Sandy Prominent redox concentrations 6-9 10YR 5/2 50 10YR 5/6 10 C M Sandy Prominent redox concentrations 9-16 10YR 6/2 60 10YR 5/8 10 C M Sandy Prominent redox concentrations 2.5Y 2.5/1 30 RM M Prominent redox concentrations 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) Histic Epipedon(A2) _Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) X Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) _Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) X Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and _2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: Depth(inches): Hydric Soil Present? Yes X No Remarks: Second soil matrix 0-6: 10YR 2/1 48%.Second soil matrix 6-9: 10YR 2/1 40%. Soil indicators S6(Stripped Matrix)and F8(Redox Depressions)present,assumedly from high flow conditions. Meets criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(Al) _Salt Crust(B11) _Surface Soil Cracks(B6) _High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) _Saturation(A3) _Hydrogen Sulfide Odor(C1) X Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) _Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) _Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) _Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) _Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) _FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes No X Depth(inches): Saturation Present? Yes X No Depth(inches): 6 Wetland Hydrology Present? Yes No X (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: Secondary indicator B10(Drainage Patterns)was observed. Does not meet criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/15/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-C3W Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): wetland/floodplain Local relief(concave,convex, none): concave Slope(%): 0 Subregion(LRR/MLRA): LRR G Lat: 40.130402° Long: -104.836015° Datum: North American1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: PEM1C(emergent wetland) Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes X No Is the Sampled Area Hydric Soil Present? Yes X No within a Wetland? Yes X No Wetland Hydrology Present? Yes X No Remarks: Wetland sample plot, paired with upland plot SP-C3U, in a wetland flat/floodplain off of the unnamed creek in the northwestern portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 2 (A) 3• Total Number of Dominant Species 4. Across All Strata: 2 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 100.0% (A/B) 1. 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 50 x 1 = 50 5. FACW species 15 x 2= 30 =Total Cover FAC species 0 x 3= 0 Herb Stratum (Plot size: 5 ) FACU species 12 x 4= 48 1. Juncus balticus 20 Yes FACW UPL species 3 x 5= 15 2. Juncus compressus 15 No FACW Column Totals: 80 (A) 143 (B) 3. Onopordum acanthium 3 No UPL Prevalence Index =B/A= 1.79 4. Taraxacum officinale 2 No FACU 5. Carex utriculata 50 Yes OBL Hydrophytic Vegetation Indicators: 6. Bassia scoparia 10 No FACU _1 -Rapid Test for Hydrophytic Vegetation 7. X 2-Dominance Test is>50% 8. X 3-Prevalence Index is.3.01 9. _ _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 100 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 0 Present? Yes X No Remarks: Dominant vegetation is representative of wetland vegetation. Meets criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-C3W Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-4 10YR 3/1 95 10YR 4/6 5 C PL/M Sandy Prominent redox concentrations 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) _Histic Epipedon(A2) X Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) X Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and 2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: gravel/rock Depth(inches): 4 Hydric Soil Present? Yes X No Remarks: Soil indicators S5(Sandy Redox)and F8(Redox Depressions)were observed with prominent redox concentrations from the soil surface. Large rocks presented a restrictive layer at 4". Meets criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(Al) _Salt Crust(B11) _Surface Soil Cracks(B6) X High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) X Saturation(A3) _Hydrogen Sulfide Odor(Cl) X Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) X Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) _Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) X Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) X FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes X No Depth(inches): 4 Saturation Present? Yes X No Depth(inches): 0 Wetland Hydrology Present? Yes X No (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: Primary indicators A2(Water Table at 4"),A3(Saturation at 0"),C3(Oxidized rhizospheres on living, untilled roots)were all observed,as well as secondary indicators B10(Drainage patterns), D2(Geomorphic position)and D5(FAC-neutral test). Meets criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/15/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-D1U Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): berm Local relief(concave,convex, none): convex Slope(%): 5 Subregion(LRR/MLRA): LRR G Lat: 40.13007° Long: -104.836513° Datum: North American1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: none Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes No X Is the Sampled Area Hydric Soil Present? Yes No X within a Wetland? Yes No X Wetland Hydrology Present? Yes No X Remarks: Upland sample plot,paired with wetland plot SP-D1W,on a berm between Aquatic Resource C and wetland ditch(Aquatic Resource D)in the northwest portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 0 (A) 3• Total Number of Dominant Species 4. Across All Strata: 3 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 0.0% (A/B) 1. Elaeagnus angustifolia 25 Yes FACU 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 0 x 2= 0 25 =Total Cover FAC species 0 x 3= 0 Herb Stratum (Plot size: 5 ) FACU species 45 x 4= 180 1. Onopordum acanthium 5 No UPL UPL species 50 x 5= 250 2. Antennaria parvifolia 5 No UPL Column Totals: 95 (A) 430 (B) 3. Thlaspi arvense 20 Yes FACU Prevalence Index =B/A= 4.53 4. Descurainia pinnata 10 No UPL 5. Bromus tectorum 30 Yes UPL Hydrophytic Vegetation Indicators: 6. _1 -Rapid Test for Hydrophytic Vegetation 7. _2-Dominance Test is>50% 8. _3-Prevalence Index is.3.01 9. _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 70 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 30 Present? Yes No X Remarks: Dominant vegetation is representative of upland vegetation. Does not meet criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-D1U Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-2 10YR 3/2 100 Sandy Prominent redox concentrations 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) Histic Epipedon(A2) _Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) _Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and 2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: gravel/rock Depth(inches): 2 Hydric Soil Present? Yes No X Remarks: No soil indicators were observed. Large gravel/rocks presented a restrictive layer at 2". Does not meet criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(Al) _Salt Crust(B11) _Surface Soil Cracks(B6) _High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) _Saturation(A3) _Hydrogen Sulfide Odor(C1) _Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) _Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) _Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) _Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) _FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes No X Depth(inches): Saturation Present? Yes No X Depth(inches): Wetland Hydrology Present? Yes No X (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: No hydrology indicators were observed. Does not meet criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/15/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-D1W Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): wetland ditch Local relief(concave,convex, none): concave Slope(%): 2 Subregion(LRR/MLRA): LRR G Lat: 40.130067° Long: -104.836541° Datum: North Amercan 1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: PEM1C(Emergent Wetland) Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes X No Is the Sampled Area Hydric Soil Present? Yes X No within a Wetland? Yes X No Wetland Hydrology Present? Yes X No Remarks: Wetland sample plot, paired with upland plot SP-D1U, in a ditch in the northwestern portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 2 (A) 3• Total Number of Dominant Species 4. Across All Strata: 2 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 100.0% (A/B) 1. 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 48 x 1 = 48 5. FACW species 50 x 2= 100 =Total Cover FAC species 2 x 3= 6 Herb Stratum (Plot size: 5 ) FACU species 0 x 4= 0 1. Typha latifolia 40 Yes OBL UPL species 0 x 5= 0 2. Carex utriculata 8 No OBL Column Totals: 100 (A) 154 (B) 3. Asclepias speciosa 2 No FAC Prevalence Index =B/A= 1.54 4. Spartina pectinata 40 Yes FACW 5. Juncus balticus 10 No FACW Hydrophytic Vegetation Indicators: 6. _1 -Rapid Test for Hydrophytic Vegetation 7. X 2-Dominance Test is>50% 8. X 3-Prevalence Index is.3.01 9. _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 100 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 0 Present? Yes X No Remarks: Dominant vegetation is representative of wetland vegetation. Meets criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-D1W Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-3 10YR 2/1 90 10YR 4/6 10 C PL/M Mucky Sand Prominent redox concentrations 3-8 10YR 5/1 60 10YR 4/6 30 C M Sandy Prominent redox concentrations 2.5Y 2.5/1 10 C M Distinct redox concentrations 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) _Histic Epipedon(A2) X Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) X Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) _Depleted Matrix(F3) Very Shallow Dark Surface(F22) X Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) _Redox Depressions(F8) X Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and _2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: gravel/rock Depth(inches): 8 Hydric Soil Present? Yes X No Remarks: Soil indicators All (Depleted Below Dark Surface),S1 (Sandy Mucky Mineral),S5(Sandy Redox)and S6(Stripped Matrix)were observed with prominent and distinct redox concentrations from the soil surface. Large rocks presented a restrictive layer at 8". Meets criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(Al) _Salt Crust(B11) _Surface Soil Cracks(B6) X High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) X Saturation(A3) _Hydrogen Sulfide Odor(Cl) _Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) X Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) _Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) _Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) X Thin Muck Surface(C7) _Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) X FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes X No Depth(inches): 2 Saturation Present? Yes X No Depth(inches): 0 Wetland Hydrology Present? Yes X No (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: Primary indicators A2(Water Table at 2"),A3(Saturation at 0"), C3(Oxidized Rhizospheres),and C7(Thin Muck Surface)were all observed,as well as secondary indicator D5(FAC-neutral test). Meets criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/14/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-UP1 Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): irrigation ditch Local relief(concave,convex, none): concave Slope(%): 2 Subregion(LRR/MLRA): LRR G Lat: 40.127607° Long: -104.831794° Datum: North American1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: None Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes No X Is the Sampled Area Hydric Soil Present? Yes No X within a Wetland? Yes No X Wetland Hydrology Present? Yes No X Remarks: Upland sample plot within an irrigation ditch located in the eastern portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 1 (A) 3• Total Number of Dominant Species 4. Across All Strata: 3 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 33.3% (A/B) 1. 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 0 x 2= 0 =Total Cover FAC species 15 x 3= 45 Herb Stratum (Plot size: 5 ) FACU species 30 x 4= 120 1. Rumex crispus 15 Yes FAC UPL species 15 x 5= 75 2. Bassia scoparia 30 Yes FACU Column Totals: 60 (A) 240 (B) 3. Bromus inermis 15 Yes UPL Prevalence Index =B/A= 4.00 4. 5. Hydrophytic Vegetation Indicators: 6. _1 -Rapid Test for Hydrophytic Vegetation 7. _2-Dominance Test is>50% 8. 3-Prevalence Index is.3.01 9. 4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 60 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 40 Present? Yes No X Remarks: Plants are representative of upland vegetation. Does not meet criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-UP1 Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-6 10YR 3/2 100 Loamy/Clayey 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) Histic Epipedon(A2) _Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) _Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and 2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: rock Depth(inches): 6 Hydric Soil Present? Yes No X Remarks: Rock/cobble-lined irrigation ditch presented rock restrictive layer at 6". No soil indicators were observed. Does not meet criteria for hydric soil. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(Al) _Salt Crust(B11) _Surface Soil Cracks(B6) _High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) _Saturation(A3) _Hydrogen Sulfide Odor(C1) _Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) _Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) _Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) X Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) _FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes No X Depth(inches): Saturation Present? Yes No X Depth(inches): Wetland Hydrology Present? Yes No X (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: One(1)secondary indicator, D2(geomorphic position),was present as the plot was situated in a ditch. Does not meet criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/14/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-UP2 Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): irrigation ditch Local relief(concave,convex, none): concave Slope(%): 2-3 Subregion(LRR/MLRA): LRR G Lat: 40.127044° Long: -104.831858° Datum: North American1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: None Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes No X Is the Sampled Area Hydric Soil Present? Yes X No within a Wetland? Yes No X Wetland Hydrology Present? Yes No X • Remarks: Upland sample plot within an irrigation ditch located in the eastern portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 1 (A) 3• Total Number of Dominant Species 4. Across All Strata: 3 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 33.3% (A/B) 1. Bassia scoparia 15 Yes FACU 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 0 x 2= 0 15 =Total Cover FAC species 25 x 3= 75 Herb Stratum (Plot size: 5 ) FACU species 65 x 4= 260 1. Rumex crispus 25 Yes FAC UPL species 15 x 5= 75 2. Bassia scoparia 50 Yes FACU Column Totals: 105 (A) 410 (B) 3. Bromus inermis 10 No UPL Prevalence Index =B/A= 3.90 4. Onopordum acanthium 5 No UPL 5. Hydrophytic Vegetation Indicators: 6. _1 -Rapid Test for Hydrophytic Vegetation 7. _2-Dominance Test is>50% 8. _3-Prevalence Index is.3.01 9. _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 90 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 10 Present? Yes No X Remarks: Plants are representative of upland vegetation. Does not meet criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-UP2 Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-3 10YR 3/3 80 10YR 4/6 5 C PL Sandy Distinct redox concentrations 3-9 10YR 2/1 95 10YR 3/6 5 C PL/M Sandy Prominent redox concentrations 9-14 10YR 2/1 80 10YR 4/6 20 C PL/M Loamy/Clayey Prominent redox concentrations 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) _Histic Epipedon(A2) X Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) _Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and 2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: Depth(inches): Hydric Soil Present? Yes X No Remarks: In layer 0-3 inches,additional matrix 10YR 2/1 present at 15%. Soil indicator S5 was observed,with prominent and distinct redox concentrations.The hydric soil is assumed to be from snowmelt and precipitation events that pond in this low-lying ditch. Meets criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(Al) _Salt Crust(B11) _Surface Soil Cracks(B6) _High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) _Saturation(A3) _Hydrogen Sulfide Odor(C1) _Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) _Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) _Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) X Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) _FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes No X Depth(inches): Saturation Present? Yes No X Depth(inches): Wetland Hydrology Present? Yes No X (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: One(1)secondary indicator, D2(geomorphic position),was present as the plot was situated in a ditch. Does not meet criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/14/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-UP3 Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): irrigation ditch Local relief(concave,convex, none): concave Slope(%): 3 Subregion(LRR/MLRA): LRR G Lat: 40.125359° Long: -104.832241° Datum: North Amencan 1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: None Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil Yes ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes No X Is the Sampled Area Hydric Soil Present? Yes No within a Wetland? Yes No X Wetland Hydrology Present? Yes No X • Remarks: Upland sample plot within a concrete-lined irrigation ditch located in the southeast corner of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 1 (A) 3• Total Number of Dominant Species 4. Across All Strata: 4 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 25.0% (A/B) 1. 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 0 x 2= 0 =Total Cover FAC species 20 x 3= 60 Herb Stratum (Plot size: 5 ) FACU species 20 x 4= 80 1. Rumex crispus 20 Yes FAC UPL species 45 x 5= 225 2. Bassia scoparia 5 No FACU Column Totals: 85 (A) 365 (B) 3. Bromus inermis 15 Yes UPL Prevalence Index =B/A= 4.29 4. Bromus tectorum 10 No UPL 5. Convolvulus arvensis 20 Yes UPL Hydrophytic Vegetation Indicators: 6. Taraxacum officinale 15 Yes FACU _1 -Rapid Test for Hydrophytic Vegetation 7. _2-Dominance Test is>50% 8. _3-Prevalence Index is.3.01 9. _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 85 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 15 Present? Yes No X Remarks: Plants are representative of upland vegetation. Does not meet criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-UP3 Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) Histic Epipedon(A2) _Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) _Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) _Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and _2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: concrete Depth(inches): 0 Hydric Soil Present? Yes No Remarks: Concrete-lined irrigation ditch with no soils present. No soil indicators were observed. Does not meet criteria for hydric soil. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(A1) _Salt Crust(B11) _Surface Soil Cracks(B6) _High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) _Saturation(A3) _Hydrogen Sulfide Odor(C1) _Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) _Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) _Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) _Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) X Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) _FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes No X Depth(inches): Saturation Present? Yes No X Depth(inches): Wetland Hydrology Present? Yes No X (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: One(1)secondary indicator, D2(geomorphic position),was present as the plot was situated in a ditch. Does not meet criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/14/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-UP4 Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): field Local relief(concave,convex, none): none Slope(%): 0 Subregion(LRR/MLRA): LRR G Lat: 40.126505° Long: -104.832946° Datum: North American1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: None Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes No X Is the Sampled Area Hydric Soil Present? Yes X No within a Wetland? Yes No X Wetland Hydrology Present? Yes No X Remarks: Upland sample plot in a field in the southeast portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 0 (A) 3• Total Number of Dominant Species 4. Across All Strata: 1 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 0.0% (A/B) 1. 2. Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 0 x 2= 0 =Total Cover FAC species 0 x 3= 0 Herb Stratum (Plot size: 5 ) FACU species 65 x 4= 260 1. Convolvulus arvensis 10 No UPL UPL species 15 x 5= 75 2. Chenopodium album 65 Yes FACU Column Totals: 80 (A) 335 (B) 3. Bromus inermis 5 No UPL Prevalence Index =B/A= 4.19 4. 5. Hydrophytic Vegetation Indicators: 6. _1 -Rapid Test for Hydrophytic Vegetation 7. _2-Dominance Test is>50% 8. _3-Prevalence Index is.3.01 9. _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 80 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 20 Present? Yes No X Remarks: Plants are representative of upland vegetation. Does not meet criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-UP4 Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-3 10YR 3/1 100 Sandy 3-11 10YR 3/1 95 10YR 5/8 5 C PL Sandy Prominent redox concentrations 11-16 10YR 3/1 90 10YR 5/8 10 C PL Sandy Prominent redox concentrations 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) _Histic Epipedon(A2) X Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) _Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) _Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and _2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: Depth(inches): Hydric Soil Present? Yes X No Remarks: Soil indicator S5(Sandy Redox)was observed with prominent redox concentrations below 3".The field was formerly used for agriculture and flood irrigated. It is assumed the flood irrigation led to long standing water accumulation. Meets criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(Al) _Salt Crust(B11) _Surface Soil Cracks(B6) _High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) _Saturation(A3) _Hydrogen Sulfide Odor(C1) _Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) _Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) _Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) X Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) _Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) _FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes No X Depth(inches): Saturation Present? Yes No X Depth(inches): Wetland Hydrology Present? Yes No X (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: One(1)secondary indicator,C9(Saturation Visible on Aerial Imagery),was documented. Does not meet criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/14/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-UP5 Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): field Local relief(concave,convex, none): none Slope(%): 0 Subregion(LRR/MLRA): LRR G Lat: 40.129298° Long: -104.831101° Datum: North Amencan 1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: None Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling pi X Hydrophytic Vegetation Present? Yes No X Is the Sampled Area Hydric Soil Present? Yes X No within a Wetland? Yes No X Wetland Hydrology Present? Yes No X Remarks: Upland sample plot in a field in the northeast portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 0 (A) 3• Total Number of Dominant Species 4. Across All Strata: 2 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 0.0% (A/B) 1. 2. _ Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 0 x 2= 0 =Total Cover FAC species 5 x 3= 15 Herb Stratum (Plot size: 5 ) FACU species 45 x 4= 180 1. Convolvulus arvensis 45 Yes UPL UPL species 45 x 5= 225 2. Bessie scoparia 45 Yes FACU Column Totals: 95 (A) 420 (B) 3. Rumex crispus 5 No FAC Prevalence Index =B/A= 4.42 4. 5. Hydrophytic Vegetation Indicators: 6. _1 -Rapid Test for Hydrophytic Vegetation 7. _2-Dominance Test is>50% 8. _3-Prevalence Index is.3.01 9. _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 95 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 5 Present? Yes No X Remarks: Plants are representative of upland vegetation. Does not meet criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-UP5 Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-3 10YR 4/1 98 10YR 5/6 2 C M Sandy Prominent redox concentrations 3-12 10YR 3/1 95 10YR 5/6 5 C M Sandy Prominent redox concentrations 12-16 10YR 2/1 100 Sandy 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) _Histic Epipedon(A2) X Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) _Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) _Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and _2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: Depth(inches): Hydric Soil Present? Yes X No Remarks: Soil indicator S5(Sandy Redox)was observed with prominent redox concentrations.The field was formerly used for agriculture and flood irrigated. It is assumed the flood irrigation led to long standing water accumulation. Meets criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(A1) _Salt Crust(B11) _Surface Soil Cracks(B6) _High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) _Saturation(A3) _Hydrogen Sulfide Odor(C1) _Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) _Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) _Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) X Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) _Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) _FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes No X Depth(inches): Saturation Present? Yes No X Depth(inches): Wetland Hydrology Present? Yes No X (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: One(1)secondary indicator,C9(Saturation Visible on Aerial Imagery),was documented. Does not meet criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 U.S. Army Corps of Engineers OMB Control#:0710-0024,Exp:9/30/2027 WETLAND DETERMINATION DATA SHEET—Great Plains Region Requirement Control Symbol EXEMPT: See ERDC/EL TR-10-1; the proponent agency is CECW-CO-R (Authority:AR 335-15,paragraph 5-2a) Project/Site: NCCI Pit#1 Expansion Area City/County: Fort Lupton/Weld Sampling Date: 5/15/2025 Applicant/Owner: J&T Consulting, Inc. State: CO Sampling Point: SP-UP6 Investigator(s):N. Rothman Section,Township, Range: S 24,T 2N, R 67W Landform(hillside,terrace,etc.): field Local relief(concave,convex, none): none Slope(%): 0 Subregion(LRR/MLRA): LRR G Lat: 40.129485° Long: -104.83603° Datum: North American1983 Soil Map Unit Name: Aquolls and Aquents,gravelly substratum NWI classification: None Are climatic/hydrologic conditions on the site typical for this time of year? Yes X No (If no,explain in Remarks.) Are Vegetation No ,Soil No ,or Hydrology No significantly disturbed? Are"Normal Circumstances"present? Yes X No Are Vegetation No ,Soil No ,or Hydrology No naturally problematic? (If needed,explain any answers in Remarks.) SUMMARY OF FINDINGS—Attach site map showing sampling pi X Hydrophytic Vegetation Present? Yes No X Is the Sampled Area Hydric Soil Present? Yes No X within a Wetland? Yes No X Wetland Hydrology Present? Yes No X Remarks: Upland sample plot in a field in the western portion of the survey area. VEGETATION —Use scientific names of plants. Absolute Dominant Indicator Tree Stratum (Plot size: 30 ) %Cover Species? Status Dominance Test worksheet: 1. Number of Dominant Species That 2. Are OBL, FACW,or FAC: 0 (A) 3• Total Number of Dominant Species 4. Across All Strata: 1 (B) =Total Cover Percent of Dominant Species That Sapling/Shrub Stratum (Plot size: 15 ) Are OBL, FACW,or FAC: 0.0% (A/B) 1. 2. _ Prevalence Index worksheet: 3. Total%Cover of: Multiply by: 4. OBL species 0 x 1 = 0 5. FACW species 0 x 2= 0 =Total Cover FAC species 10 x 3= 30 Herb Stratum (Plot size: 5 ) FACU species 15 x 4= 60 1. Convolvulus arvensis 70 Yes UPL UPL species 70 x 5= 350 2. Senecio vulgaris 15 No FACU Column Totals: 95 (A) 440 (B) 3. Rumex crispus 10 No FAC Prevalence Index =B/A= 4.63 4. 5. Hydrophytic Vegetation Indicators: 6. _1 -Rapid Test for Hydrophytic Vegetation 7. _2-Dominance Test is>50% 8. _3-Prevalence Index is.3.01 9. _4-Morphological Adaptations'(Provide supporting 10. data in Remarks or on a separate sheet) 95 =Total Cover _Problematic Hydrophytic Vegetation' (Explain) Woody Vine Stratum (Plot size: 5 ) 'Indicators of hydric soil and wetland hydrology must 1. be present,unless disturbed or problematic. 2. Hydrophytic =Total Cover Vegetation %Bare Ground in Herb Stratum 5 Present? Yes No X Remarks: Plants are representative of upland vegetation. Does not meet criteria for hydrophytic vegetation. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 SOIL Sampling Point: SP-UP6 Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color(moist) % Color(moist) % Type1 Loc2 Texture Remarks 0-10 10YR 3/2 100 Loamy/Clayey gravelly loam 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix,CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: _Histosol(A1) _Sandy Gleyed Matrix(S4) _1 cm Muck(A9)(LRR I,J) Histic Epipedon(A2) _Sandy Redox(S5) _High Plains Depressions(F16) _Black Histic(A3) _Stripped Matrix(S6) (LRR H outside of MLRA 72&73) _Hydrogen Sulfide(A4) _Loamy Mucky Mineral(F1) _Reduced Vertic(F18) _Stratified Layers(A5)(LRR F) _Loamy Gleyed Matrix(F2) _Red Parent Material(F21) _1 cm Muck(A9)(LRR F,G, H) Depleted Matrix(F3) Very Shallow Dark Surface(F22) _Depleted Below Dark Surface(A11) _Redox Dark Surface(F6) _Other(Explain in Remarks) _Thick Dark Surface(Al2) Depleted Dark Surface(F7) _Iron Monosulfide(A18) _Redox Depressions(F8) _Sandy Mucky Mineral(S1) _High Plains Depressions(F16) 3lndicators of hydrophytic vegetation and 2.5 cm Mucky Peat or Peat(S2)(LRR G, H) (MLRA 72&73 of LRR H) wetland hydrology must be present, 5 cm Mucky Peat or Peat(S3)(LRR F) unless disturbed or problematic. Restrictive Layer(if observed): Type: gravel/rock Depth(inches): 10 Hydric Soil Present? Yes No X Remarks: No soil indicators were observed. Does not meet criteria for hydric soils. HYDROLOGY Wetland Hydrology Indicators: Primary Indicators(minimum of one is required;check all that apply) Secondary Indicators(minimum of two required) _Surface Water(Al) _Salt Crust(B11) _Surface Soil Cracks(B6) _High Water Table(A2) _Aquatic Invertebrates(B13) _Sparsely Vegetated Concave Surface(B8) _Saturation(A3) _Hydrogen Sulfide Odor(C1) _Drainage Patterns(B10) _Water Marks(B1) _Dry-Season Water Table(C2) _Oxidized Rhizospheres on Living Roots(C3) _Sediment Deposits(B2) _Oxidized Rhizospheres on Living Roots(C3) (where tilled) _Drift Deposits(B3) (where not tilled) _Crayfish Burrows(C8) Algal Mat or Crust(B4) _Presence of Reduced Iron(C4) _Saturation Visible on Aerial Imagery(C9) _Iron Deposits(B5) _Thin Muck Surface(C7) _Geomorphic Position(D2) _Inundation Visible on Aerial Imagery(B7) _Other(Explain in Remarks) _FAC-Neutral Test(D5) Water-Stained Leaves(B9) Frost-Heave Hummocks(D7)(LRR F) Field Observations: Surface Water Present? Yes No X Depth(inches): Water Table Present? Yes No X Depth(inches): Saturation Present? Yes No X Depth(inches): Wetland Hydrology Present? Yes No X (includes capillary fringe) Describe Recorded Data(stream gauge, monitoring well,aerial photos,previous inspections), if available: Remarks: No hydrology indicators were documented. Does not meet criteria for wetland hydrology. ENG FORM 6116-5,SEP 2024 Great Plains—Version 2.0 A. ERC NCCI Pit#1 Expansion Area Aquatic Resource Delineation Report APPENDIX C U.S. Army Corps of Engineers (USACE) OMB Control No. 0710-XXXX RAPID ORDINARY HIGH WATER MARK (OHWM) FIELD IDENTIFICATION DATA SHEET Approval Expires: The proponent agency is Headquarters USAGE CECW-CO-R. Project ID#: 420-2501 Site Name:NCCI Pit#1 Expansion Area Date and Time: 5/14/2025, 1:30 p.m. Location(lat/long):40.129569,-104.83214 Investigator(s):N. Rothman Step 1 Site overview from remote and online resources Describe land use and flow conditions from online resources. Check boxes for online resources used to evaluate site: Were there any recent extreme events(floods or drought)? gage data X LiDAR geologic maps No recent events were recorded.Land use has historically been agricultural or oil and gas.This ditch,known as Meadow nclimatic data X satellite imagery land use maps Island Ditch No. 1,appears to have remained the same in shape Flaerial photos n topographic maps Other: and size throughout its existence in the survey area. Step 2 Site conditions during field assessment First look for changes in channel shape,depositional and erosional features,and changes in vegetation and sediment type,size,density,and distribution. Make note of natural or man-made disturbances that would affect flow and channel form,such as bridges, riprap, landslides, rockfalls etc. The channel has very little erosion; however, there are several reaches of the ditch that have riparian wetlands on either side. There are no culverts or other structures that have altered the shape of the ditch within the survey area. Step 3 Check the boxes next to the indicators used to identify the location of the OHWM. OHWM is at a transition point,therefore some indicators that are used to determine location may be just below and above the OHWM.From the drop-down menu next to each indicator,select the appropriate location of the indicator by selecting either just below'b',at 'x',or just above a'the OHWM. OHWM.Go to page 2 to describe overall rationale for location of OHWM,write any additional observations,and to attach a photo log. Geomorphic indicators Sediment indicators Ancillary indicators IX Break in slope: x Soil development: �/ Wracking/presence of x " organic litter: 7Xon the bank:x Changes in character of soil: n Presence of large wood: n undercut bank: Mudcracks: n Leaf litter disturbed or washed away: n valley bottom: n Changes in particle-sized X Water staining: b distribution: nOther: n transition from to n Weathered clasts or bedrock: nShelving: n upper limit of sand-sized particles Other observed indicators? shelf at top of bank: n silt deposits: Describe: natural levee: Vegetation Indicators nman-made berms or levees: Change in vegetation type x n and/or density: other Check the appropriate boxes and select berms: the general vegetation change(e.g., XChannel bar: graminoids to woody shrubs). Describe the vegetation transition looking from n shelving(berms)on bar: the middle of the channel,up the 1X unvegetated:b banks,and into the floodplain. nion vegetat transition vegetation (go to ioneg.indicators) X absent to:graminoids Step 4 Is additional information needed to nsediment transition n support this determination? (go to sed.indicators) moss to: n Yes �X No FT upper limit of deposition forbs to: on bar: If yes,describe and attach information nInstream bedforms and other X graminoids to:forbs to datasheet: bedload transport evidence: deposition bedload indicators n woody n (e.g.,imbricated clasts, shrubs to: gravel sheets, etc.) n deciduous bedforms(e.g.,poofs, trees to: riffles, steps,etc.): coniferous erosional bedload indicators trees to: n (e.g.,obstacle marks,scour, X Vegetation matted down b smoothing,etc.) n and/or bent: Exposed roots below Secondary channels: n intact soil layer: ENG FORM 6250,AUG 2021 PREVIOUS EDITIONS ARE OBSOLETE. Page 1 of 4 Project ID#: 420-2501 Step 5 Describe rationale for location of OHWM At this OHWM point for Aquatic Resource A (OHWM-A1), there is a clear break in slope and vegetation line, from unvegetated below the OHWM and vegetated heavily above the OHWM. Additional observations or notes Attach a photo log of the site.Use the table below,or attach separately. Photo log attached? n Yes No If no,explain why not: List photographs and include descriptions in the table below. Number photographs in the order that they are taken.Attach photographs and include annotations of features. Photo Photograph description Number A Photo taken at OHWM Al. ENG FORM 6250,AUG 2021 Page 2 of 4 U.S. Army Corps of Engineers (USACE) OMB Control No. 0710-XXXX RAPID ORDINARY HIGH WATER MARK (OHWM) FIELD IDENTIFICATION DATA SHEET Approval Expires: The proponent agency is Headquarters USAGE CECW-CO-R. Project ID#: 420-2501 Site Name:NCCI Pit#1 Expansion Area Date and Time: 5/14/2025, 3:00 p.m. Location(lat/long):40.129141,-104.836508 Investigator(s):N. Rothman Step 1 Site overview from remote and online resources Describe land use and flow conditions from online resources. Check boxes for online resources used to evaluate site: Were there any recent extreme events(floods or drought)? gage data X LiDAR geologic maps No recent events were recorded.Land use has historically been agricultural or oil and gas. Based on aerial imagery, nclimatic data X satellite imagery land use maps this ditch appears to have changed in the northern portion Fa aerial photos !��I topographic maps Other: due to mining activities on the adjoining property. Step 2 Site conditions during field assessment First look for changes in channel shape,depositional and erosional features,and changes in vegetation and sediment type,size,density,and distribution. Make note of natural or man-made disturbances that would affect flow and channel form,such as bridges, riprap, landslides, rockfalls etc. The channel has very little erosion. There are two culverts: one in the middle of the ditch beneath an oil and gas facility access road and one on the upstream end(SW corner of survey area). The channel widens before and after both culverts. Step 3 Check the boxes next to the indicators used to identify the location of the OHWM. OHWM is at a transition point,therefore some indicators that are used to determine location may be just below and above the OHWM.From the drop-down menu next to each indicator,select the appropriate location of the indicator by selecting either just below'b',at 'x',or just above'a'the OHWM. OHWM.Go to page 2 to describe overall rationale for location of OHWM,write any additional observations,and to attach a photo log. Geomorphic indicators Sediment indicators Ancillary indicators IX Break in slope: x Soil development: Wracking/presence of x " organic litter: nXon the bank:x Changes in character of soil: n Presence of large wood: n undercut bank: Mudcracks: n Leaf litter disturbed or washed away: n valley bottom: n Changes in particle-sized Water staining: distribution: nOther: n transition from to n Weathered clasts or bedrock: nShelving: n upper limit of sand-sized particles Other observed indicators? shelf at top of bank: n silt deposits: Describe: natural levee: Vegetation Indicators nman-made berms or levees: Change in vegetation type n and/or density: other Check the appropriate boxes and select berms: the general vegetation change(e.g., XChannel bar: graminoids to woody shrubs). Describe the vegetation transition looking from n shelving(berms)on bar: the middle of the channel,up the 1X unvegetated:b banks,and into the floodplain. nvegetation transition vegetation (go to veg.indicators) absent to: Step 4 Is additional information needed to nsediment transition n support this determination? (go to sed.indicators) moss to: n Yes �X No nupper limit of deposition forbs to: on bar: If yes,describe and attach information nInstream bedforms and other n graminoids to: to datasheet: bedload transport evidence: deposition bedload indicators n woody n (e.g.,imbricated clasts, shrubs to: gravel sheets, etc.) n deciduous bedforms(e.g.,poofs, trees to: riffles, steps,etc.): coniferous erosional bedload indicators trees to: n (e.g.,obstacle marks,scour, X Vegetation matted down b smoothing,etc.) n and/or bent: Exposed roots below Secondary channels: n intact soil layer: ENG FORM 6250,AUG 2021 PREVIOUS EDITIONS ARE OBSOLETE. Page 1 of 4 Project ID#: 420-2501 Step 5 Describe rationale for location of OHWM At this OHWM point for Aquatic Resource B (OHWM-B 1), there is a clear break in slope and vegetation line, from unvegetated below the OHWM and vegetated heavily above the OHWM. Additional observations or notes Attach a photo log of the site.Use the table below,or attach separately. Photo log attached? n Yes No If no,explain why not: List photographs and include descriptions in the table below. Number photographs in the order that they are taken.Attach photographs and include annotations of features. Photo Photograph description Number B Photo taken at OHWM B1. ENG FORM 6250,AUG 2021 Page 2 of 4 U.S. Army Corps of Engineers (USACE) OMB Control No.0710-XXXX RAPID ORDINARY HIGH WATER MARK(OHWM) FIELD IDENTIFICATION DATA SHEET Approval Expires: The proponent agency is Headquarters USACE CECW-CO-R. Project ID#: 420-2501 Site Name:NCCI Pit#1 Expansion Area Date and Time: 5/15/2025, 2:30 p.m. Location(lat/long):40.130664,-104.835826 Investigator(s):N. Rothman Step 1 Site overview from remote and online resources Describe land use and flow conditions from online resources. Check boxes for online resources used to evaluate site: Were there any recent extreme events(floods or drought)? gage data X LiDAR geologic maps No recent events were recorded.Land use has historically been agricultural or oil and gas. Based on aerial imagery nclimatic data X satellite imagery n land use maps since 1993,this creek appears to have remained the same Fa aerial photos n topographic maps Other: in shape and size. Step 2 Site conditions during field assessment First look for changes in channel shape,depositional and erosional features,and changes in vegetation and sediment type,size,density,and distribution.Make note of natural or man-made disturbances that would affect flow and channel form,such as bridges,riprap,landslides, rockfalls etc. There are multiple locations of riparian wetlands along the creek's stretch through the survey area. There are no man-made disturbances,aside from outlets that release water from Aquatic Resource B into the creek upstream of the survey area). Step 3 Check the boxes next to the indicators used to identify the location of the OHWM. OHWM is at a transition point,therefore some indicators that are used to determine location may be just below and above the OHWM.From the drop-down menu next to each indicator,select the appropriate location of the indicator by selecting either just below'b',at 'x',or just above'a'the OHWM. OHWM.Go to page 2 to describe overall rationale for location of OHWM,write any additional observations,and to attach a photo log. Geomorphic indicators Sediment indicators Ancillary indicators >r<Break in slope: x n Soil development: Wracking/presence of x " organic litter: Xon the bank:x Changes in character of soil: n Presence of large wood: 15 undercut bank:b n Mudcracks: n Leaf litter disturbed or washed away: n valley bottom: n Changes in particle-sized n Water staining: distribution: nOther: transition from to — Weathered clasts or bedrock: Shelving: n upper limit of sand-sized particles Other observed indicators? nshelf at top of bank: n silt deposits: Describe: natural levee: Vegetation Indicators nman-made berms or levees: �/ Change in vegetation type x n and/or density: other Check the appropriate boxes and select berms: the general vegetation change(e.g., Channel bar: graminoids to woody shrubs).Describe the vegetation transition looking from n shelving(berms)on bar: the middle of the channel,up the 15 unvegetated:b banks,and into the floodplain. vegetation transition vegetation I/\I(go to veg.indicators)x X absent to:graminoids Step 4 Is additional information needed to nsediment transition support this determination? (go to sed.indicators) moss to: n Yes �X No FT upper limit of deposition forbs to: on bar: If yes,describe and attach information nInstream bedforms and other X graminoids to:forbs to datasheet: bedload transport evidence: deposition bedload indicators n woody n (e.g.,imbricated clasts, shrubs to: gravel sheets,etc.) n deciduous nbedforms(e.g.,poofs, trees to: riffles,steps, etc.): coniferous erosional bedload indicators trees to: n (e.g.,obstacle marks,scour, X Vegetation matted down b smoothing,etc.) n and/or bent: Exposed roots below Secondary channels: intact soil layer: ENG FORM 6250,AUG 2021 PREVIOUS EDITIONS ARE OBSOLETE. Page 1 of 4 Project ID#: 420-2501 Step 5 Describe rationale for location of OHWM At this OHWM point for Aquatic Resource E (OHWM-E1), there is a clear break in slope and vegetation line, from unvegetated below the OHWM and vegetated heavily above the OHWM. There are also points along the OHWM where there is undercutting of the bank or vegetation matted down below the OHWM. Additional observations or notes Attach a photo log of the site. Use the table below,or attach separately. Photo log attached? X Yes ri No If no,explain why not: List photographs and include descriptions in the table below. Number photographs in the order that they are taken.Attach photographs and include annotations of features. Photo Photograph description Number C Photo taken at OHWM El. ENG FORM 6250,AUG 2021 Page 2 of 4 A ERC NCCI Pit#1 En Aquatic Resource Delineationxpa sion Report OHWM PHOTO LOG S , o hs '� ` :' ;1' a. ;�: e -_ u :,� t ' ^t ,`"4'F '� bra �, 1`7, d k +' a`a`rid" .�,, , t • '{� x�a�t`•K gg as S 7L a �r§� � � � Fs �µ h'3 � Y'T�-k�� 1 • • \:a �' i of : .'.Y t � » �� a rn Photo A. View facing upstream within Aquatic Resource A, Photo B. View facing upstream within Aquatic Resource A, showing break in slope, vegetation transition from showing break in slope and vegetation transition. OHWM is unvegetated to graminoids, and bent vegetation. OHWM is depicted by blue line and OHWM Bl point by the yellow dot. depicted by blue line and OHWM Al point by the yellow dot. f P_ / - `^ ,,4.x act. „- ,�,� �' '' • Photo C. View facing upstream within Aquatic Resource E, showing vegetatio unvegeated to graminoids, bank undercutting,bent vegetation,and a tWM El point clear break in slope. OHWM is depicted by blue line and OHby the yellow dot. EXHIBIT K Climate Climate information was available for the Brighton 3 Se, CO weather station from the Western Regional Climate Center. The climate data collected from 2000 through 2025 indicates the average total annual precipitation at the site to be approximately 13.78 inches per year. Monthly average temperature and precipitation data for the 25-year period of record are provided in the following table: Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Average Temperature 30.1 31.2 41.3 48.9 57.3 69.0 74.8 72.7 64.6 51.3 40.2 31.3 51.0 (F) Average Max. 37.6 40.4 48 54.1 61.4 73.5 77.7 75.2 68.4 57.3 45.5 40.1 53.4 Temperature(F) Average Min. 18.4 26.3 35 42.6 51.8 64.1 71.2 68.1 59.6 43 30.4 23.8 48.4 Temperature(F) Average Total 0.40 0.50 1.07 1.51 2.67 1.27 1.53 1.41 1.25 0.91 0.54 0.33 13.78 Precipitation(in.) • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application EXHIBIT L Reclamation Cost A phased and cumulative bonding approach is proposed for the NCCI Pit #1 amendment area mining site operation. The financial warranty required for each phase is the warranty required to completely reclaim that phase. Direct costs related to the construction of the reclamation components that have been included in the financial warranty calculations include: Scarifying disturbed ground surfaces, re-applying topsoil over disturbed areas, revegetating disturbed areas, dewatering the full pit, slurry wall liner construction, and contractor mobilization. The slurry wall liner construction costs have been broken down further to include costs for different depths to bedrock as provided from the DRMS on previous 112 applications. Overhead, profit, and project management costs were then calculated and added to the direct construction costs to arrive at the required financial warranty for each phase. As each new phase is started, the financial warranty for that phase will be posted with the Division. When a phase has been reclaimed, inspected, and accepted by the Division, the associated financial warranty for that phase can then be reduced/released to 20% of the financial warranty required for that phase. Please see the attached calculations for details of the costs and quantities used to determine the financial warranty required for each phase of mining. The following table summarizes the financial warranty required for each phase, and the cumulative financial warranty that will be provided during any given phase. Reclamation Cost Summary Additional Financial Cumulative Warranty Financial Phase Required Warranty 1 $1,829,092 $1,829,092 2 $465,465 $2,294,556 • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application JET Consulting, Inc. Northern Colorado Constructors,Inc. NCC Pit#1 Expansion January 23,2026 Reclamation Bond Quantities and Costs ©2025 J&T Consulting,Inc. 23017 Pit#1 Expansion-Rec.Bond Calc's Summary of Unit Costs Direct costs Re-applying topsoil 12"thick $1,800.00 /acre Revegetating disturbed area $1,000.00 /acre Dewatering full pit $400.00 / million gallons Slurry Wall Cost(36 foot average depth @$5.50/ft) $198.00 / linear foot Scarifying Ground $200 /acre Mobilization $2,500 lump sum Overhead and Profit Costs Liability insurance 1.55% of direct cost Performance bond 1.05% of direct cost Profit 10.00% of direct cost Total Overhead Cost 12.60% of direct cost Proiect Management Engineering and bidding 4.25% of direct cost Management and administration 5.00% of direct cost Total Additional Cost 9.25% of direct cost Reclamation Operation-Phase 1 Quantity Unit Unit Cost Cost Scarifying Disturbed Area-Topsoil/OB Stockpile,Access Road,Plant Site Areas,Loadout Area,Scale 74.48 ac $ 200 $ 14,896 Topsoil Placement Disturbed Area-Topsoil/OB Stockpile,Access Road,Plant Site Areas,Loadout Area,Scale 74.48 ac $ 1,800 $ 134,064 Revegetate Disturbed Area-Topsoil/OB Stockpile,Access Road,Plant Site Areas,Loadout Area,Scale 74.48 ac $ 1,000 $ 74,480 Removal of foundations for Scale House and Scale 50 cy $ 200.00 $ 10,000 Removal of Soil for Sediment Ponds and Removal of Berms for Sediment Ponds 3,759 cy $ 2.00 $ 7,517 Slurry Wall 5,971 If $ 198.00 $ 1,182,319 Dewatering of Pit-Northwest Pit and South Pit 150 mg $ 400 $ 59,824 Mobilization 1.0 Is $ 18,000 $ 18,000 Total Direct Cost $ 1,501,101 Overhead and Profit Cost(12.60%) $ 189,139 Contract Cost $ 1,690,240 Project Management(9.25%) $ 138,852 Total Financial Warranty Required for Phase 1 $ 1,829,092 Reclamation Operation-Phase 2 Quantity Unit Unit Cost Cost Scarifying Disturbed Area-Mining Area and Access Road 8.79 ac $ 200 $ 1,758 Topsoil Placement Disturbed Area-Mining Area and Access Road 8.79 ac $ 1,800 $ 15,822 Revegetate Disturbed Area-Mining Area and Access Road 8.79 ac $ 1,000 $ 8,790 Backfilling of Northeast Pit w/GB material 176,314 cy $ 2.00 $ 352,628 Mobilization 1 Is $ 3,000 $ 3,000 Total Direct Cost $ 381,998 Overhead and Profit Cost(12.60%) $ 48,132 Contract Cost $ 430,130 Project Management(9.25%) $ 35,335 Additional Financial Warranty Required for Phase 2 $ 465,465 Cummulative Financial Warranty Required for Phase 1 and Phase 2 $ 2,294,556 EXHIBIT M Other Permits and Licenses Northern Colorado Constructors, Inc. will apply for and obtain the following permits and/or notices prior to commencement of any mining or mining-related activities that would require the permit or notice to be obtained at the NCCI Pit#1 amendment area mining site: Colorado Office of the State Engineer • Well Permit (Prior to exposing groundwater) • Substitute Water Supply Plan (Prior to exposing groundwater) • Leak Test Approval for Slurry Wall Liner(s) (after construction of slurry walks)) Colorado Department of Public Health and Environment • Air Pollution Emission Notice • Colorado Discharge Permit System City of Fort Lupton • Annexation • Zoning • Use By Special Review Permit • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application EXHIBIT N Source of Legal Right to Enter Northern Colorado Constructors, Inc. (NCC) and 4Z Investments, LLP (4Z) are the owner of the affected land and the substance to be mined (See Exhibit 0), since NCC will be the permitted operator, so they have the legal right to enter and mine the site currently and 4Z has provided a Legal Right to Enter letter allowing NCC to enter the 4Z property. (See Attached Legal Right to Enter letter) • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application Source of Legal Right to Enter By Owner of Affected Land and Substance to be Mined: 4Z Investments, LLP 9075 County Road 10 Fort Lupton, CO 80621 Mr. Patrick Lennberg Environmental Protection Specialist Department of Natural Resources Division of Reclamation, Mining and Safety 1313 Sherman Street Room 215 Denver, CO 80203 Re: NCCI Pit#1 DRMS Permit Application — Construction Material Regular (112) Operation Reclamation Permit Amendment Mr. Lennberg: Please accept this letter as evidence that the applicant/miner, Northern Colorado Constructors, Inc., has permission to enter and initiate a mining operation on the affected lands. By signing this letter, we warrant that we have the legal and sole ownership of the affected lands and substance to be mined, and authority to offer this permission. Thank you, Mr. Chris Zadel 4Z Investments, LLP State of tolo,ra.J,o ) )ss County of W J Q) ) Tte foregoing instrument was acknowledged before me this 36411 day of txt , b'y OILY S and 0 W✓ter✓ LISA I Notary Public NO PUBLIC StateA of ColoradoHANSFOR fi My Commission Expires /O /L/ v?7 Notary ip#20074038662 My COmmission Expires 10/14/20/7 EXHIBIT 0 Owner of Record of Affected Land (Surface Area) and Owner of Substance to be Mined Northern Colorado Constructors, Inc. 9075 County Road 10 Fort Lupton, CO Eaton, CO 80621 4Z Investments, LLP 9075 County Road 10 Fort Lupton, CO Eaton, CO 80621 Deeds are attached. IM Northern Colorado Constructors, Inc. Id' la'Consulting,Inc. NCCI Pit#1 DRMS 112 Permit Amendment Application QQ� QQ� !5021 '� 04/09/2025 10:58,S QQ� sv Q Q Tot ages: 7 Rec Fee: $; ..0 Q QO�� QQQO QQ ' ly Koppes - Clerk QaQ r ecorder, Weld Cout CO Q �,..--ff, QQ�O - --- + +O O C.D. N 024-286 QQO QQO QQO QQO QQ� Q O O Q Q QQQ CIAL WARRAI��Co ,e DEED QOQ QOQ '&' THIS SPEC '�� ARRANTY DEE �.s2. rb _f-//7 . 202 �0between the City QQ� O of Thornton, a C. oR. `o home rule municip. �► duly organized and cx '�� _ under and by virtue QQ QQ� of the laws o� State of Colorado, ,'- address is 9500 Ci `*j'enter Drive, Thornto Q Colorado 8! • ("Grantor") and Nort Colorado Constructor."., a Colorado corpora whose adds is 9075 WCR 10, For4upton, Colorado 80621 `.. rantee"). CO -6 QO QOrc- QO WITNESS, that the Pr'antor, for and in consid ion of the sum of TEN& D NO/100s Q: �OLLARS ($10.00) an Sher good and valuable ,nsideration. the receip iurd sufficiency of Q QQwhich is hereby ackno ged, hereby grants, h < "s. sells. conveys and ins. unto Grantee QO QO and Grantee's sue ors. heirs and assigFns�orever•. all the real .� erty. together with QO Q improvements, i dy, situate, lying and l g in the County of W- State of Colorado, as Q le .. described as: 0 S ) QQ 0 O O O of 2 and Lot 3 O O City of Tho iton Resubdivision of Lupton Meadows Lange.. Division No. 3 -Ca ` ► . RES22-0005 (Rece 0No. 4975993), as corm d by the Q� QQ Surveyor' /*es. of Correction (I r c Lion No 4982050) ,Cy QQ QC(t'he "Property") excep %' excluding and retai o to Grantor: (i) surfa dater rights: (ii) Q(2. (,)Wall rights to oil, gas `•lL other minerals and m• interests, and relat nterests in rents. Q O profits. royalties a AVher income owned by ntor; (iii) a blanket e it to access. install, O oQ0 construct, enlar � se, operate. maintain. r :ce. repair, reconstruct. rove, relocate. inspect( Q survey, test ar r� rrrove. at any time and co lime to time as may 6 etirl to, or constructe QO Grantor w.414.17 ipelines, headgate, c ts. vaults, meters, vat thanholes, vent pipes. t ` i y location in. cers. access roads, or r other underground \ ter pipeline stru res � p utility (inclur Yip;, but not limited to, cr imunication facilities) a all necessary under°gro id cables. Q wir 4nd all improvements an ppurtenances thereto("i veinents")on. under. �i oYigh,over Q a Pcross the Property. Q said Improvements ha cell constructed. the beet easement QO f+ said improvements sh• I1 duce to fifty-loot(50' de easements,twenty- v- 'eet(25')from rther side of the cent *Ve of the water pipelik� the as-built locatio d (iv) a blanket Qb QO access easement thr a to, in. on, over. acro i d along the Property t ow Grantor ingress QO QO and egress by foo tides, trucks or heavy {pment to Grantor's adrng reservoir property QO QQ for all purpose Acessai y for Grantor to ilc- te, inspect. repair. niool and maintain Grantor QQ reservoir. QQ QQ Q�O TOGE`1"Q)HER WITH all and singular the hereditaments, appurtenances and priveges there,A. belonging, or in an r se thereunto appertain` and the reversions_ *ainders, Q ret ..issues and profits the. ° ': and all the estate, r' t, title. interest, clam d demand Q tix Stever of the Grantor, er in law or equity. o- and to the above bares d Property, 0' QQQ t h hereditaments ands urtenances; QQQ QQ QQQQ Q TO HAVE AW.i .3 HOLD the said P c rtf above bargained described with the + appurtenances. t `Grantee and Grantee' 4 'rs. successors and as g forever. Grantor. for+ QO itself and its cssor and assigns. d covenant and agree Grantor shall and w' WARRANT D FOREVER DEF the above bargarn�"j roperty in the quie peaceable session of Grantee. a rantee's heirs. sueces' • and assigns against t..nd every . rsan or persons claimin the whole or any part th reof, by. through or undo Grantor exce q °•nd subject to the folio matters as shown of ,tibit A attached heret ' QO QO QO QO QO QO Q V QQQO PagQ�fj� QQQO QQQO QQO QQO QQO QQO QQO QQ� QQ� 5021 '� 04/09/2025 10:58 ' QQ� Q Q Pam of 7 Q Q QQ QQ QQ QQ QQ QQQ,. . r �QtQ.....- - -- --- - �Q+ �Q+ C.D. N��%.0v> 6 QQO QQO QQO QQO QQ CO Q4 Q4 CO Q� ,� @IT IS FURTHER AG :4® D AND ACKNOW 4, GED, by and betwe t Grantor and Q 0 rpno G antee that the water s sa,,syge reservoir on adlace�h°operty owned by Grar, Tray negatively 2. impact the Property, iding but not limited41Furface runoff, or risir _% nd/gar lowering of QQ� groundwater, whi ay damage the Prope•Qj rantee hereby agree �i indemnify and hold Q oQ� harmless Granto�ainst any damages or�aims associated with tl\Property caused by theQ� Q construction.all, r. maintenance, use art m operation of the water�_ age reservoir on the la Qo adjacent to, ��roperty. This indemnarion and hold harmless i ision shall run with th 'd and be binds g on the heirs, successors nd assigns of Grantee. ITNESS WHEREO h Grantor and Grante e executed this deed ogt e day and e �y rrst above written. Q QQ QQQb QQQb �'•NTOR QQ b QQ�b oQ�O oQ�O oQ�OITY OF THORNT 04 oQQO � � �� .�Q �� Q Q Tansy a. 1 A AMQ T. QQQ city- G4 r QOQ QOQ QQMQ QQb QQb ,,o QQb QQQ Kristen N. Ros um, City Clerk QQQ C9 C9 APPROVES TO FORM: Tami llico, City Attorney ri} u igned by: QQ� QQ� QQ� QQ� QQ(�%" �CA t3DriSGY3dC24CII... :QQQ% Q(\ i Q(\ i Q(\ i �+ STATE OF C cO + + + DO ) � � 9 o � ) ss. QO QO QO COUNTY obi' ADAMS ) The I going instrument w•.iknowlcdged before this)o day of e , Q� 2 , by Tansy D. Hayr2o, City Manager of the J of Thornton. a Colo.. home rule QQ 2. icipality. ��Q QQ QQ QQ QQQ( Witness my hand ansAikcial seal. QQQ QQOQ QQ. � QQ� My commissiono kires: oQw 7f oQQ� QQ Jg1nJ : ►QO Qo `] y Pub is Qo Q �i� a JOANNA CHAVEZ s s d � oQ� oQ� oQ� q,• ARY PUBLIC-STATE OF COLO v �' O O O NOTARY ID 2018400317 O o� MY COMMISSION EXPIRES JAN2026 b Q. Q. Q� Q�F _ QQQ I �. Q — ` QQQ QQQ QQQ QO9 QO9 QO9 QO9 QO9 QQ� QQ� 5021 '� 04/09/2025 10:58 ' QQ' Q Q Pa! of 7 Q Q QQQO QQQO QQQO QQ Q QO QQO e.. QQO 0�� 0�� C.D. N.04:�24-286 QQO QQO QQO QQ O4 O4 O O4 O4 QQ QQ GRANT" QQ QQ O� OO O� QOO O� N I HERN COLORAD QQQ QQ ,;N STRUCTORS, INC. O QQ QQ AaColorado corporatiA e e O Q e By: cl� QQO QQ QQ Its: Q QO QO QO QO QO QO QO Q�TSTATE OF COLO'�•'Ate ) CH" CH" QQ CH" �� ss. ooO, �ooO, �ooO, QQ� County of �®� �' ) Oos Oos Oos Th,e�,f�`rego' _ 'Zstrtlment was ackno ed before me this.3r ofde/h 0?�1' � y t�d'[ctS as 'Tr re..r' of Northern Col�it`ado Constr tors, inc., a Colorado co:oration. QQ QQ QQ 00-, ss my hand and offici tp.I. QO QO QO Q Qly commission expire�f//V/? 7 QQ� O O f::;eCd O QQO QQO QQ otary Public QQO QQO oOi- ---,44,,sin:tA-- - OOR HAIVSFORD ``�o 0 0 NOTARY PUBLIC V O O State of Colorado Notary ID#2OO740866 Q Q Q Q My Commission Expires 10/ 7 000 000 000 QQ O`��r O0 QQ QQ QQQO QQQO QQQO QQQO QQQO QQO QQO QQO QQO QQO O O O O O QO QO QO QO QO QQQO QQQO QQQO QQQO QQQO QQO QQO QQO QQO QQO O O O O O QO QO QO QO QO QQQO QQQO QQQO QQQO QQQO QQO QQO QQO QQO QQO QQ� QQ� 5021 t 04/09/2025 10:58 ' QQ� vo Q Q Pam of 7 Q Q QQQ QQ QQ QQ QQ �Q �... . r --- - - QQ�� Q+ oQ+ C.D. N�,��%.24-286 QQO QQO QQO QQO QQ 4.Q Q EXHIBIT A Q Q Q ALTA a MITMENT FOR TIT 4!SURANCE (07-01-2 Q QQ QQ SCH fit LE B PART II I D BY QQQ QQb QQb QQ WART TITLE GUARAb QQ NT� MPANY QQQ QQQ QQQ QQQ QQQ Qweptions QQQ QQQ File No.: 2403105164.Q ®®Q ®®Q Q Some hiQT.ical land records contai criminatory Covenants 4'. -re illegal and unenforc �i- by law. This QQ Comma nt and the Policy treat a i'scriminatory Covenant in4,)` •cument referenced in S V=ule B as if each Q Dis i atory Covenant is re.,,,,. ., repudiated, remov-. ?fd not republished or I ulated. Only the (��r�j ing provisions of the d� t•ent will be excepted fro !erage. QQ QQb QQ?he Policy will not insure 'k st loss or damage result, jfFom the terms and condi �Gof any lease or easemeht QQ identified in Schedule A, ill include the following Ex '' ions unless cleared to the . -'action of the Company: QQ\S QQ1. Rights or clC• of`parties in possession, nown by the Public Records QQ 2. Easerry�nts, or claims of easements, rypt shown� by the Public Record. 4.Q Q 3. A encroachment, encumbran ioiolation, variation, or adve -f ircumstance affecting the .that would be QQ osed by an accurate and •ete land survey of the La V•• not shown by the Public ' •rds. �o Q Any lien, or right to a lien,�vervices, labor or material lt ofore or hereafter furnished %"posed by law and not QQb QQ shown bythe PublicGGQ •Rs. QQ QQ QQ QQ 5. Any defect, lien, —*mbrance, adverse claim, o er matter that appears for ,1. rst time in the Public Reco QQ or is created, t�=es, or is disclosed betwee_ ' Commitment Date and th ,`"- on which all of the Sche. Part I-ReC rients are met. 11 QQ Q 6. (a)Un•atented mining claims;(b) res-rvations or exceptions in patens or in Acts authorizing the iss ance thereof; (c) •.t;rals of whatsoever kind, su®.4,ace and surface substanc , , on, under and that may b-mkoduced from Q t nd, together with all rights 4 ileges, and immunities rel - ° thereto, whether or not th- Otters excepted Q -r(a), (b)or(c)are shown ' e Public Records or listed • hedule B. Q� QD QQWater rights, claims or titI ater. QQb QQb QQb QQ� 8. Any and all unpaid and assessments and an �S�deemed tax sales. QQ� GQQ� QQOo* 9. Right of way for my Roads 30 feet on eithee of Section and Township , as established by the Bo. •` of County C i sioners for Weld County, ded October 14, 1889 in Bo&s5 at Pave 273. QQ 10. Easements, notes, restrictions and rights- way, as set forth on the plat of he Lupton Meadows Land Company Map.Division No. 3, recorded June 12, 1909, at Reception t 90 1� 26. Q Q Q Q Q 11. te‘11 of Way Easement contain Quit Claim recorded Apri4 914 in Book 39' at Paae QQ Q�'Reservation of minerals aa. tPtained in Quit Claim Deed y.`ded October 4, 1948 in B.4610235 at Page 157. QQQ Q 13. Oil and Gas Lease r.-,f.ed February 16, 1971 at R �on No 156 14/. Q Q Qf NOTE: Affidavit o `e Extension or Productio ded January 15, 1975 at ii.Votion No 1562146. + This page is only a party i 16 •ALTAO Commitment for Tit�lep m:•• •nce. This Commitment is not v-, out the Notice;the Comtnitme4tu Lie Policy;the Commilme,A,ditions,Schedule A,'Schedule B,.. Requirements;and Schedule B ,t-Exceptions;and a countersrgito y the Company or its issuing-•=nf that may be in electronic form. fir/ Copyright 2021 erican Land Title Association. Alftghts reserved. Q =memQ The use of thi (or any derivative thereof)is re tr' ed to ALTA licensees and ALTA meters in good standing as of the date se. Q All other 1e prohibited. Reprinted under Ii ® m the American Land Title Ass iat n. Q File No. --w.0310516 �Q V`- CQ CCO/ .TAf 4•mmitment For Title Insurance Stip e B II(07-01-2021)COM 2. QQQ�y� QQQ QQQ QQQ QQQ0 QQ� QQ� 5021 '� 04/09/2025 10:58 '40 QQ� Q Q Pay of 7 Q Q QQ QQ QQ QQ QQ Cr — -- QQ+ Q+ Q+ C.D. N��=. 4-286 QQ QQO QQO QQO QQ .�4 EXHIBIT A Q QQ QQ ALT£ J1NIMITMENT FOR TIT � JSURANCE (07-01- �� QD QD S ULEBPARTII %A2. .. .. .. LART TITLE GUARAQ�OMPANY )Q *\e QQQ QQQ QQQ ceptions QQQ QQQ 14. Mil Deed recorded July 30, 1rat Reception No 1572480.e QA QA ``15. ht Of Way Agreement rec• .o -• August 29, 1974 at Recer.Qr�'No 1643695. QD QD Q� . United Stated Departm-� the Interior Bureau of Re Lion Colorado-Big Thom Project License � Q recorded August 29, i at Reception No 164369 recorded February 5, 197� eceotion No 1653502. Q, O 17. Ri ht of-Wa A *% % 2? �O *Q g y •+ -- ent recorded January 24, at Reception No 1oo2(3__. QQo NOTE: Assi•,;0g- t, Conveyance and Bill of�.J-Agreement recorded May 5 020 at Reception No 459 0 18. Right-of-V Agreement recorded May 1 1975 at Reception No 16+.60 A4 . NOT . Assignment, Conveyance a,nc Bill of Sale Agreement record May 15, 2020 at Reception �Jo 4590804. Q 19. :�bt-of-Way Agreement recor• �` aki) y 28, 1975 at Reception °16613i 7.• �Q QQ TE: Assignment, Convey` , and Bill of Sale Agreemen rded May 15, 2020 at Re -n No 4500804. Q QQ(<0. Right-of-WayAgreeme�tcrded January 19, 1977 at ption No 1709196. �Q� QQQ QQ 21. Mineral Deed reco August 31, 1988 at Receu o 021 i35526 and re-recori •ctober 3, 1988 at Q QQ Reception i}9oQ 392. QQ QQ�C QQQ QQ 22. Affidavit of`q-`recorded December 13, 1+{�t Reception No 02164221 QQ ov 23. Dry-ll;p Covenant recorded Decem erb 13, 1988 at Reception No 0 16488332, Q Q 24. 6..nment, Deed and Irrevoc-. took Power recorded Dec--�-r 13, 1988 at Reception No 11-4833. QQ Perms, conditions, stipulnd obligations contained 'ecial Warranty Deed and1A ment of Lease QQQ recorded May 25, 1990 .� ceptlQn !0 02215002.�QQ QQQ QQQQb . „ 26. Pipeline Right-of-rant recorded May 28, 19' f ecept an rJo 2251284. QQ QQ Qo9 27. Right-of-Way® t recorded June 25, 1992 `ception No 02293194. Q9 Q9 28. Mineral rits conveyed in Warranty Deejcorded July 1, 1999 at Recinn_No 704137. 29. Ri jb•f-Way Grant recorded Aug 6, 1999 at Reception No Q 84. QQ QQ o 0 0 30c sements shown on Parcel 0• recorded January 20, 200k 'eceotion No 302512?. QD QD QO Reservation of 0354A7 d lity nts as coQntainQ arranty Deed recordeQQF ary 25, 2003 at re, ' F2eceotan No. 30354� _ d Reception No 3035479 QQO 32. Surface Use Ag�*Oent recorded June 24, 200 oception No 3076604. QQ� Q� 0 This page is only a pa . 2016 ALTA®Commitment for T'+ , rance. This Commitment is not �,�,�thout the Notice;the Commitm ssue Policy;the Commit editions;Schedule A;Schedule; i I-Requirements;and Schedule II-Exceptions;and a countersi_'t a by the Company or its issui riTgent that may be in electronic form. Copyright 202 American Land Title Association. SI rights reserved. Q Q Q The use of+.'��- FormFo (or any derivative thereof)is ricted to ALTA licensees and ALTA '4"bers in good standing as of the da use. Q All othe ' .are prohibited. Reprinted under - e from the American Land Title A ' ion. Q File N•�) 000310516 C Q V`-- Q C A Commitment For Title Insurance Schedule B 11(07-01-2021)COM . . Q Q QQof4 QQ� QQQ QQQ QQQ QQO QQO QQO QQO QQO QQ� QQ� 5021 '� 04/09/2025 10:58 ' QQ� Q Q Pam• of 7 Q Q QQQ QQ QQ QQ QQ Q9 Q9 Q9 Q* C.D. N.0 6 24-286 QQ4 QQ4 EXHIBIT A 4 94 94 ALT+��MMITMENT FOR TITOISURANCE (07-01-2�6 QO QO S . .ULEBPARTII Q Q Q Q f (STEWADRT TITLE GUARA 7OOMPANY Q�O . Q�O� QnO� Q + Q Q QQ QQ eptions QQ QQ NOTAmendment recorded Aprils 2022 at Reception No 4822471, Q Q 52. l lotion recorded August 5, eat Reception No 4974930.6 QQ QQ Easements, notes, restricti. and rights-of-way, as set fo pnthe plat of City of Thornt.r eessubdivision of Q� Lupton Meadows Land 1Pleivision No. 3-Case No. 0005, recorded August 9 ia'4,at Reception No 4975993. ((�j _ (��j n. + NOTE: Surveyor' avit of Correction recorde `tember 12, 2024 at Receo ' ca 4982_050. e � Q9 avik. The Compan ekes no representation as t.�y present ownership of any Eineral or water interests. e may be le , '�',a•'grants, exceptions or resens of interests that are not QQ The following notices purl to CRS 9-1.5-103 concer 44 nderground facilities have 4n filed with the QG Clerk and Recorder: Q Q Q Q QQ� (a)Mountain Bell one Company recorded . er 1, 1981 NI in Book 949 at e tatron No ter0705. QQ� Q (b)Western SI+�j as Company recorded Mar '. 1983 in Book 990 at Rec No 1919757. Q (c)Associat•oy . aural Gas, Inc, recorded J S , 1984 in Book 1037 at Ren No 19748 a0 and Q Q� recorded' :�Dlva .er 1, 1984 in Book 1045 a eptton No 1983584 and rev .ed March 3, 1988 in Book Q� Q 1187 a 'ton No 2132709 and r-- d Aril 10, 1989, in book 1 :' : Reception No 2 i i 591 i QO QQ (d)P: ndle Eastern Pipe Line Coo?, y, recorded October 1, 198;'I,Book 949 at Reception Lf.g 18e%46 and recorded June 26, 19t In Book 1117 at Reception f‘. _058722. Ae)Colorado interstate Gas Co4 pany recorded August 31, 1964 in Book 1041 at Reception No 1979784 Q Union Rural Electric Ass* .n, Inc., recorded October 81 in Book 949 at Recetti+1 187 1004. QQ (g)Western Gas Supply ,a .any recorded April 2, 19854 ook 1063 at Reception No sb4300 QQ Q (h)Public Service Come of Colorado recorded Nov-Z,.-r 9, 1981 in Book 952 at •tion No Q 1874084. M QQ� (i)St.Vrain Sanit bistrict, recorded Decernb , 1988 at Reception No r 13 0. Q� Q (j)United Pow ., recorded January 24, 19s Reception No 223.9296 tO QQD QQ (k) Left Han er District, recorded Augu s ,, 1990 at Reception No. 22A' . + (I)Wigging phone Association record--� tober 14, 1992 at Rece ttF.% 2315829. QQ QQ QQ QQO" QQO + QQO QOQ QOQ QOQ QOQ QOQ QQ QQ QQ Q- QQ QQ QQ QQ QQ + O O eurance.o This page is only a pa 2016 ALTA®Commitment for This Commitment is not z®ifhout the Notice;the Commit ®ssue Policy;the Commit d nditions;Schedule A;Schedule c -Requirements;and Schedule= - •11-Exceptions;and a counters', by the Company or its issuing-gent that may be in electronic form. Copyright 202 merican Land Title Association.4rights reserved. Q QimoismasQ The use o f Form(or any derivative thereof)I It icted to ALTA licensees and ALTA jry'�yi,bers in good standing as of the da K use. QQ All oth-,d/i. are prohibited. Reprinted under '•- e from the American Land Title A �Ftion. O O File No10,000310516 l'� of q Commitment For Title InsuraO�#c edule B II(07-01-2021)COM Q.Q QA%. Q.Q QQ� QQ� QQ� QQ� QQ� QC9 QC9 O� O� O� 45021 's04/09/2025 1 0:58 ' QQQQ4 QQQ4 Pam of 7 Q Q 94 Q Q Q Q Q Q Q Q QQ Q Q� * 0Q Q Q e 4-286 �Q� A EXHIBIT A Q� e A QA ALTA4 MMITMENT FOR TITS,$NSURANCE (07-01- v'� QD S �, .ULEBPARTII QQ QQ QQ QQ Q�� ART TITLE GUARA JED BY O�PANY QC�O� QC�O� QC�O� Q� QQ� Q4ceptions QQ� QQ� 33. L.,�.berm Road Maintenance a rt4rovements Agreement for my Roads 18 and 25(Zad orded Q� Q h 21, 2005 at Reception NN 70234. QQ QQ QQ QQ�4 USR 1394 Northern Colo Qd Constructors, Inc plat recor May 20, 2005 at ecet�tQQ 328793B. Q.Q „ 35. •Land Survey Plat reC d August 11,2006 at Rec No 3411226. Q� Q� QQ+ 36. Surface UseSSA! ent recorded April 2, 200 ece0tson No 354504.0. Q.q QQ� QQ 37. Relinquispot and Conveyance of Surf ghts recorded April 2, 200 eceplIon No 3545041. QQ' 38. Mein randum of Release of Easeme�njt Rights Agreement and First mendment to Surface Use Agr ement reed April 2, 2008 at f ecepti R . 3545042. Q� A. A 39 greement recorded May 14,F. '8 at Reception No. 35539922�0 Q'O Q'O QD��. Irrigation Water Trans ann Agreement and Easeme�td Right-of-Way Grant reco` V ay 14, 2008 at Q� QQQ Reception NQ. �J.?�J3 � �Q� QQ� c,QQ 41. Relinquishmenn04Conveyance of Irrigation�t,' e Rights recorded May 1411 t8 at Reception No 355399 QQ 42. Amendm .Surface Use Agreement r 41ed May 28, 2008 at Rr ce Jo 3'556918. QQ 43. Wat, Rights Warranty Deed record August 5, 2008 at Rece ton ,!0 3570375. Q Q 44. 4e p Covenant recorded Au.ji, 2008 at Reception No -75. QQ QQ Cy •TE:Assignment of Dry-U•(. enant recorded March 29, at Reception No 375887Q Q . 5.. Water rights conveyed uui claim Deed recorded Aug , 2008 at Reception No 3QQT. QQ� QQ��> 46. Easements, note ,,t�.�. rictions and rights-of-way, t forth on the plat of AmU , 394 Northern Colorado Q� Constructors, Ip CCI PIT#1 recorded Jung 010 at Rece.tsan No 3c . QQ� QQ 47. Resolutioay+ rrded June 18, 2010 at Re UUn N 37 t? 9 QQ QQ 48. Dee of Perpetualer Electric Utility Easement recorded January 17, 2014 at Reception No 39905 a8. Q 49. lution recorded January at Recention No 3992tio QQ QQQ �� 0 Q'Q� Deed of Non-Exclusive El ic Utility Easement recorde ember 9, 2014 at Recepti 5 2014000061029 (Adams County record�'._�).=nd recorded April 8, 2022�teention No 481 r122. ,ce QQ Q7 + 51. Deed of Perpetua Exclusive Easement and it dment of Existing Easemg� orded May 28, 2015 at QQ� oQ Reception No 4- 03. oQ ��Q SS Q QQO This page is only anps q at®016 ALTA®Commitment for T,$� susurance. This Commitment is riot irt• without the Notice;the Commi -1L�Issue Policy;the Commit editions;Schedule A;Schedule:t4ip I-Requirements;and Schedule rt II-Exceptions;and a countersi. re by the Company or its issuing agent that may be in electronic form. Copyright 21rr 'merican Land Title Association. rights reserved. AliQ The use AZT Form(or any derivative thereof)ii''ricted to ALTA licensees and ALT bers in good standing as of the d use. QQ All oth- are prohibited. Reprinted unde//i . e from the American Land Title - Lion. O File N 4000310516 V '`' C.614,,TA Commitment For Title Insurance edule B II(07-01-2021)COM .Q .Q .Q QQ� =3of4 QQQ� QQQ� QQQ� QQQ� O� 49 9 12/22/2023 03:; 4'M 4.- OA OC 46'.: Pages: 1 Rec FeO 3.00 Doc Fee: $13�O, r O� �� . arty Koppes - Clerk,apRecorder, Weld Coyaiy , CO O O� O�O� O�O� O�O� Oe IF C9 C9 C9 C9 �O� Land T GUA ANTEE,,0 A._® O� O� A - O '. Special Warr. ti Deed O 'V (,*te Documentary Fee OrO� OrO� (Pursuant to C.R.- 0-113(1)(b)) OjO` D 32.December 22,2023 O�O�' C9 C9 C9 ,.. __, ___.0' O� This Dee tive as of December 22nd,22 igned on the date(s)acknowl-of-. below,by Grantor(s), ROBE FEIS, TRUSTEE OF TH ILLIAM E.GEE ADMINISTRAT TRUST DATED JULY 31,2013 hose street address is 8995 CO Y ROAD 25,FORT 1...0i ON,CO 80621,City or Town of ORT LUPTON,County of Weld State of Colorado,for the coneration of ($1,325,0141 1 ***One Million Three Hundr enty Five Thousand and 0r air *`dollars,in hand paid,hereb s)and convey(s) to 4 Z, ,V TMENTS LLP,A LIMITED L C TY PARTNERSHIP,whose Cco, address is 9075 COUNTY RO c FORT LUPTON, O CO 8 1,City or Town of FORT LUPTt County of Weld and State of C ado,the following real property Ci e County of Weld and O ��t�of Colorado,to wit: � � �� % o�� LOT 10,A REPLAT OF 8,9 AND 10 OF THE LUPT �ADOWS LAND COMPANY b ,FF DIVISION NO.3,BEING �� O LOCATED IN THE N 4 F SECTION 24,TOWNSHIP RTH,RANGE 67 WEST OF .TH P.M.,COUNTY OF WELl •TE OFCOLORADO O O O O ALL OIL, AND RELATED RIGHTS ARR LUDED AND RESERVED TTQ LER O�O O�O also • n by street and number as: 89SCOUNTY ROAD 25 AND VACA1 LOT,FORT LUPTON,CO 806 O �O tnall its appurtenances and wa )the title to the same againss ersons claiming under me(us), ctt to Statutory Exceptions. �0�� oO�O THE DULY 31,2013 E.GEE STRAT T UST DATED��+ o��O o��O By: ROB EIS,TR STEE �O iO O iO O iO O iO O O°� Vv O°� O°� O°� Oo9 State of Colorado9 ®9 Oo9 Oo 9 )ss. County of ADAMS ) The fore..ltnstrument was acknowledgedfbi e me on this day of Decemb2tld,2023 by ROBERT FEIS AR{JSTEE OF THE " WILLI .GEE ADMINISTRATIVE TR ATED JULY 31,2013 �Oo (Oo �Oo _t4-ss my hand and official seal .2V j V� I O ,„A re,,0 Vly Commission expires: L. O� O it 7 Public .� L E O O O O NOTARY�O O T T F :�- r NOTARY ID 1:• .T.*i 8114 My Commission ,., =t:August 25,2025 When res f 1 return to: 4 Z INVESTME .-LLP,A LIMITED LIABILITY P t'RSHIP O 00 9075 COUN.M•AD 10,FORT LUPTON,CO f,_� �O �O �ow0 00 0�0 00 0�0 `atm 1090 closing/deeds/stat wd_statutory.html pq 2022350 1083) .41 I"I"'I III II II II I I, l , ci.q ZEREN LAND SERVICES OIL AND GAS TITLE P.O. Box 336337 Phone(970)351-0733 Greeley,CO 80633 Fax(970)351-0867 LIST OF MINERAL OWNERS AND MINERAL LESSEES for NOTIFICATION (4 Z Investments, LLP and Northern Colorado Constructors, Inc. Property-UPDATED) Subject Property: Township 2 North, Range 67 West of the 6th P.M., Weld County,CO Section 24: Lot 10,a Replat of Lots 8,9 and 10 of the Lupton Meadows Land Company Map of Division No. 3, according to that map thereof recorded on January 7, 1982 at Reception No.01879198, being a part of the NE% And Lots 2 and 3,City of Thornton Re-Subdivision of Lupton Meadows Land Company Division No. 3 Case No. RES22-0005, recorded August 9, 2024 at Reception No.4975993,as corrected by the Surveyor's Affidavit of Correction (Reception No.4982050), being a part of the NE%and the SE% Zeren Land Services, an oil and gas title research company, states that to the best of its knowledge the following is a true and accurate list of the names and addresses of the mineral owners and mineral leasehold owners entitled to notice under the Surface Development Notification Act, Colorado Revised Statutes §24-65.5-101, et seq. in the Subject Property based upon the records of the Weld County Assessor and Clerk Recorder as of January 9,2026 at 7:45 a.m.: Mineral Owners: Mineral Leasehold Owners: None (entitled to notice) Kerr-McGee Oil &Gas Onshore LP Attn: Land Manager/Wattenberg 1099 18th Street,Suite 700 Denver,CO 80202 Noble Energy, Inc. Attn: S&TB—Rockies Land Chevron U.S.A. Inc. 2115 117th Avenue Greeley, CO 80634 K.P. Kauffman Company, Inc. (KPK) 1675 Broadway,Suite 2800 Denver, CO 80202 Merit Energy Company(nka PDC Energy Inc.) 1099 18th Street,Suite 1500 Denver, CO 80202 Page 1 of 3 Dated this 19th day of January, 2026. ZEREN ND SERVICES By: C thia A. E.Zeren,C Certi ied Professional La dman#4044 Page 2 of 3 At the request ofJ&T Consulting,Inc.("Client"),Zeren Land Services,an independent land consulting firm, has prepared the foregoing list of mineral estate owners entitled to notice under the Surface Development Notification Act,Colorado Revised Statutes§24-65.5-101, et seq. Zeren Land Services,searched(i)the records of the Weld County Assessor relating to the Subject Property for persons identified therein as mineral estate owners, and (ii)the records of the Weld County Clerk and Recorder relating to the Subject Property for recorded requests for notification in the form specified in the Surface Development Notification Act. The results of these searches are set forth above in this List of Mineral Owners Entitled to Notice. At the date of the search, the records of the Assessor and the Clerk and Recorder were posted through January 9,2026 at 7:45 A.M. Zeren Land Services,agreed to prepare this listing for the Client only if the Client agreed that the liability of Zeren Land Services,would be strictly limited to the amount paid by the Client for such services. Zeren Land Services, makes no warranty, express, implied or statutory, in connection with the accuracy, completeness or sufficiency of such listing of mineral estate owners. In the event the listing proves to be inaccurate, incomplete, insufficient or otherwise defective in any way whatsoever or for any reason whatsoever,the liability of Zeren Land Services,shall never exceed the actual amount paid by Client to Zeren Land Services,for the listing. In order to induce Zeren Land Services, to provide such services, Client further agreed to indemnify and hold Zeren Land Services,its managers, members and employees, harmless from and against all claims by all persons (including, but not limited to Client) of whatever kind or character arising out of the preparation and use of each such listing of mineral estate owners,to the extent that such claims exceed the actual amount paid to Client by Zeren Land Services,for such listing. Client specifically intends that both the foregoing limitation on liability and foregoing indemnification shall be binding and effective without regard to the cause of the claim, inaccuracy or defect, including, but not limited to, breach of representation,warranty or duty,any theory of tort or of breach of contract,or the fault or negligence of any party (including Zeren Land Services) of any kind or character (regardless of whether the fault or negligence is sole, joint, concurrent, simple or gross). Client's use of this listing evidences Client's acceptance of,and agreement with,this limitation on liability and the indemnification. ZEREN LAND SERVICES Date:January 19, 2026 By: Cynthi A. E. Zeren,as Pre i t Page 3 of 3 EXHIBIT P Municipalities within Two Miles City of Fort Lupton Planning and Building 1200 Dexter Street Unit W13 Fort Lupton, CO 80621 • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 DRMS 112 Permit Amendment Application EXHIBIT Q Proof of Mailing Notices to County Commissioners and Soil Conservation District See attached. • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application RECEIVED FEB 0 5 2026 WELD COUNTY NOTICE OF FILING APPLICATION COMMISSIONERS FOR COLORADO MINED LAND RECLAMATION PERMIT FOR REGULAR(112) CONSTRUCTION MATERIALS EXTRACTION OPERATION NOTICE TO THE BOARD OF COUNTY COMMISSIONERS Weld COUNTY Northern Colorado Constructors (the "Applicant/Operator")has applied for a Regular(112)reclamation permit from the Colorado Mined Land Reclamation Board(the"Board")to conduct the extraction of construction materials operations in Weld County. The attached information is being provided to notify you of the location and nature of the proposed operation. The entire application is on file with the Division of Reclamation,Mining,and Safety(the "Division")and the local county clerk and recorder. The applicant/operator proposes to reclaim the affected land to developed water resource use. Pursuant to Section 34-32.5-116(4)(m),C.R.S.,the Board may confer with the local Board of County Commissioners before approving of the post-mining land use. Accordingly,the Board would appreciate your comments on the proposed operation. Please note that,in order to preserve your right to a hearing before the Board on this application,you must submit written comments on the application within twenty (20)days of the date of last publication of notice pursuant to Section 34-32.5-112(10), C.R.S. If you would like to discuss the proposed post-mining land use,or any other issue regarding this application,please contact the Division of Reclamation,Mining,and Safety, 1313 Sherman Street,Room 215,Denver,Colorado 80203,(303)866-3567. NOTE TO APPLICANT/OPERATOR: You must attach a copy of the application form to this notice. If this is a notice of a change to a previously filed application you must either attach a copy of the changes, or attach a complete and accurate description of the change. NOTICE OF FILING APPLICATION FOR COLORADO MINED LAND RECLAMATION PERMIT FOR REGULAR(112) CONSTRUCTION MATERIALS EXTRACTION OPERATION NOTICE TO THE BOARD OF SUPERVISORS OF THE LOCAL CONSERVATION DISTRICT Platte Valley Soil Conservation DISTRICT Northern Colorado Constructors (the"Applicant/Operator")has applied for a Regular(112)reclamation permit from the Colorado Mined Land Reclamation Board(the"Board")to conduct the extraction of construction materials operations in Weld County. The attached information is being provided to notify you of the location and nature of the proposed operation. The entire application is on file with the Division of Reclamation,Mining,and Safety(the "Division")and the local county clerk and recorder. The applicant/operator proposes to reclaim the affected land to developed water resource use. Pursuant to Section 34-32.5-116(4)(m), C.R.S., the Board may confer with the local Conservation Districts before approving of the post-mining land use. Accordingly,the Board would appreciate your comments on the proposed operation. Please note that, in order to preserve your right to a hearing before the Board on this application, you must submit written comments on the application within twenty (20)days of the date of last publication of notice pursuant to Section 34-32.5-112(10), C.R.S. If you would like to discuss the proposed post-mining land use,or any other issue regarding this application,please contact the Division of Reclamation, Mining, and Safety, 1313 Sherman Street, Room 215, Denver,Colorado 80203,(303)866-3567. NOTE TO APPLICANT/OPERATOR: You must attach a copy of the application form to this notice. If this is a notice of a change to a previously filed application you must either attach a copy of the changes, or attach a complete and accurate description of the change. EXHIBIT R Proof of Filing with County Clerk or Recorder See attached. • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 DRMS 112 Permit Amendment Application From: Travis Tuttle To: Travis Tuttle Subject: RE: Northern Colorado Constructors,Inc. DRMS 112 Permit Amendment for DRMS Permit M-2001-107 Date: Friday,February 6,2026 12:04:23 PM Attachments: image001.pnq From: Mariah Higgins <mhiggins@weld.gov> Sent: Friday, February 6, 2026 9:57:39 AM To:JC York<icyorl<@i-tconsulting.com>; CTB<CTB@co.weld.co.us> Subject: RE: Northern Colorado Constructors, Inc. DRMS 112 Permit Amendment for DRMS Permit M-2001-107 Received. Thank you! COUNTY.CO Mariah Higgins Deputy Clerk to the Board Desk: 970-400-4219 P.O. Box 758, 1150 O St., Greeley, CO 80632 IMPORTANT: This electronic transmission and any attached documents or other writings are intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. If you have received this communication in error, please immediately notify sender by return e-mail and destroy the communication. Any disclosure, copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited. From:JC York<jcyork@j-tconsulting.com> Sent:Thursday, February 5, 2026 6:03 PM To: CTB<CTB@co.weld.co.us> Subject: Northern Colorado Constructors, Inc. DRMS 112 Permit Amendment for DRMS Permit M- 2001-107 This Message Is From an External Sender This email was sent by someone outside Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Mariah — This is the DRMS 112 permit amendment application that I have already dropped a hard copy off to the Clerk to the Board earlier today. Can you provide an e-mail response back that you received this?The pdf file of the application is too large to attach to the e-mail so I placed it in the drop box folder link below. https://www.dropbox.com/scl/fi/wisdw7cna53jvgm6hilpw/23017-NCCI-Pit-l-Amendment-DRMS- Application-with-Exhibits-Signed-2026.02.03.pdf? rlkey=m4gx79d6ca7iejgcgpoag43gq&st=zro6h2vn&d1=0 Regards, J.C. J.C. York, P.E. J&T Consulting,Inc. 305 Denver Avenue, Suite D Fort Lupton, CO 80621 Office: (303) 857-6222 Mobile: (970)222-9530 FAX: (303)857-6224 EXHIBIT S Permanent Man-Made Structures within 200 Ft of the Affected Land 1. Power Lines/Poles 2. Phone Lines/Poles 3. Oil and Gas Lines and Wells 4. Fences/Structures 5. Improved Roads 6. Irrigation Channels/Ditches/Pipelines Northern Colorado Constructors, Inc. believes that the mining operation, as proposed, will not adversely affect the permanent, man-made structures located within 200 feet of the permit boundary. The applicant still anticipates providing evidence of agreements for compensation with the appropriate structure owners or an engineering evaluation (see attached slope stability report) that adequately demonstrates that the proposed mining and reclamation operations will not result in damage to the structures. The list of structure owners and structures are as follows (please refer to the mining plan maps for the specific locations): Laura and Neila Coyle Fence Chase Winston Cooley and Victoria Rubio Shaughnessy House, Outbuildings, Fence Kenneth Curby and Stacy Bierke House, Outbuildings, Fence Mary Ann Flos House, Outbuildings, Fence Kerr-Mcgee Corporation Oil/Gas Well Oil/Gas Line KP Kauffman Company Oil/Gas Well Oil/Gas Line Tank Battery United Power Power Lines/Poles Meadow Island Irrigation Ditch Little Dry Creek • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 �' DRMS 112 Permit Amendment Application Central Colorado Water Conservancy District Reservoir Fence • J&T Consulting,Inc. Northern Colorado Constructors, NCCI Pit#1 DRMS 112 Permit Amendment Application SLOPE STABILITY REPORT FOR: NCCI PIT #1 WELD COUNTY, COLORADO JANUARY 2026 PREPARED FOR: RN., in. In. NORTHERN COLORADO CONSTRUCTORS, INC . 9075 WCR 10 Fort Lupton, CO 80621 303-857-1754 PREPARED BY: J&T Consulting, Inc. 305 DENVER AVENUE—SUITE D FORT LUPTON, CO 80621 PHONE: (303) 857-6222 CERTIFICATION: I hereby certify this slope stability analysis for Northern Colorado Constructors, Inc., NCCI Pit #1, located in Weld County, Colorado was prepared by me or under my direct supervision. 0 a' 36848 '� i1 .. 1/22/2026 . G.. a James C. York Registered Professional Engineer State of Colorado No. 36846 Northern Colorado Constructors, Inc.-NCCI Pit#1 r J&T Consulting, Inc. Slope Stability 9 Table of Contents I. Introduction II. Overview III. Geotechnical Data IV. Design Analysis and Criteria V. Methodology VI. Slope Stability Results VII. Conclusions and Recommendations Appendices Appendix A Slope Stability Case Location Map Appendix B Slope Stability Case Cross-Sections Appendix C Slope Stability Case Galena Output Appendix D Geotechnical Boring Logs Appendix E USGS Map, Oct. 2002 revision — "Peak Acceleration (%g) with a 2% Probability of Exceedance in 50 yrs" Northern Colorado Constructors, Inc.—NCCI Pit#1 J&T Consulting, Inc. Slope Stability APay9e'1 I, INTRODUCTION Northern Colorado Constructors., proposes to mine the property located in the east 1/2 of Section 24, Township 2 North, Range 67 West of the 6th Principal Meridian, in Weld County, Colorado. The property is bounded by Weld County Road 18 and private property on the south, private property to the west, and north, and Weld County Road 25 on the east. The proposed mining operation will extract gravel reserves from locations adjacent to man- made structures. The rules and regulations of the Division of Reclamation, Mining, and Safety (DRMS) require that any mining within a 200-foot setback of a man-made structure show thorough engineering analysis that the proposed mining will not cause damage to the structure. The accepted method of demonstrating this is through a slope stability analysis. This report contains an overview of the methodology used in the analysis of the mining slopes and their estimated effect on all man-made structures. Recommendations regarding acceptable setbacks from man-made structures have also been included. II. OVERVIEW The DRMS mining plan proposes that the property will be mined in three cells. Two of the cells, the northwest and south, will have a slurry wall liner constructed around them before they are mined, and will be reclaimed as water storage reservoirs. The third cell, the northeast, will be wet mined, and then backfilled to above groundwater levels. The mining will occur at 3H:1V slopes. The reservoirs will remain at the mined 3H:1V slopes, and will cover a combined estimated 24.35 surface acres when full at normal operating water level. The actual combined surface area will depend on the final configuration of the reservoir after mining/reclamation is complete. III. GEOTECHNICAL DATA Exploratory drilling was done on the site by LAPIS Global Consulting. Logs of the borings from this drilling that were used to estimate the soil types and thicknesses for this study are included in Appendix D. J&T Consulting, Inc. (JT) estimated soil strength parameters based on the information from the boring logs and other stability analyses that have been performed on gravel mining operations along the Front Range. Table 1, on the following page, represents a summary of the soil strength parameters that were used in this stability analysis. Northern Colorado Constructors, Inc.—NCCI Pit#1 Slope Stability Analysis J&T Consulting, Inc. Page 1 TABLE 1 —SOIL PROPERTIES Description Max dry density Saturated Density Cohesion Internal Friction (pcf) (pcf) (psf) Angle Clay 100 115 50 25 Sand and Gravel 115 130 10 35 Slurry Wall 100 110 0 45 IV. DESIGN ANALYSIS AND CRITERIA The proposed mining and reclaimed slopes were analyzed using Clover Technologies Galena Slope Stability Analysis System, version 7.2. Galena was designed to analyze the slope stability of earth embankments subjected to several critical situations that may occur during the life of the embankment. For this project, twelve cases were identified as critical during the mining and reclamation operations. Static and pseudo-static conditions were analyzed for each case. Pseudo-static peak acceleration factors (peak horizontal acceleration, or PHA) were taken from USGS information for the western United States. The 2% probability of exceedance in 50 years (the most conservative) was used. The USGS peak acceleration map is included in Appendix E. A peak acceleration factor of 0.103 x gravity was taken from this data. A conservative earthquake loading coefficient of 0.50 x PHA is often used for slope stability analyses (50% of PHA). We used an even more conservative approach and used 70% of the PHA for this area for our earthquake loading coefficient. Hence, 0.7 x 0.103 = 0.072. All mining and reclaimed side slopes will be 3H:1V. The locations of the cases are shown on the case location map included in Appendix A. Case NE-1 — Irrigation ditch west of the northeast mining cell. The mining operation is adjacent to an irrigation ditch on the west side of the northeast mining cell. The proposed setback for mining is 25 feet from the ditch bank. The mining depth was assumed to be 21 feet in this area based on bore log information. Case NE-2 — Fence north of the northeast mining cell. The mining operation is adjacent to a fence on the north side of the northeast mining cell. The proposed setback for mining is 57 feet from the fence. The mining depth was assumed to be 22 feet in this area based on bore log information. Case NE-3 — Electric power pole and WCR 25 east of the northeast mining cell. The mining operation is adjacent to an electric power pole and Weld County Road 25 on the east side of the northeast mining cell. The proposed setback for mining is 28 feet from the power pole. The mining depth was assumed to be 23 feet in this area based on bore log information. 1Z1Northern Colorado Constructors, Inc.-NCCI Pit#1 J&T Consulting, Inc. Slope Stability 9 Case NW-1 — Oil/gas wells southwest of the northwest mining cell. The mining operation is adjacent to oil/gas wells on the southwest side of the northwest mining cell. The proposed setback for mining is 175 feet from the oil/gas wells. The mining depth was assumed to be 21 feet in this area based on bore log information. Case NW-2 — Oil/gas lines northwest of the northwest mining cell. The mining operation is adjacent to oil/gas lines on the northwest side of the northwest mining cell. The proposed setback for mining is 54 feet from the oil/gas lines. The mining depth was assumed to be 22 feet in this area based on bore log information. Case NW-3— Oil/gas line and irrigation ditch northeast of the northwest mining cell. The mining operation is adjacent to an oil/gas line and irrigation ditch on the northeast side of the northwest mining cell. The proposed setback for mining is 76 feet from the oil/gas line. The mining depth was assumed to be 22 feet in this area based on bore log information. Case NW-4 — Oil/gas wells southeast of the northwest mining cell. The mining operation is adjacent to oil/gas wells on the southeast side of the northwest mining cell. The proposed setback for mining is 175 feet from the oil/gas wells. The mining depth was assumed to be 19 feet in this area based on bore log information. Case S-1 — Oil/gas line and electric power pole west of the south mining cell. The mining operation is adjacent to an oil/gas line and electric power pole on the west side of the south mining cell. The proposed setback for mining is 50 feet from the oil/gas line. The mining depth was assumed to be 24 feet in this area based on bore log information. Case S-2 — Fence and oil/gas equipment west of the south mining cell. The mining operation is adjacent to a fence and oil/gas equipment on the west side of the south mining cell. The proposed setback for mining is 132 feet from the fence. The mining depth was assumed to be 20 feet in this area based on bore log information. Case S-3 — Oil/gas line north of the south mining cell. The mining operation is adjacent to an oil/gas line on the north side of the south mining cell. The proposed setback for mining is 50 feet from the oil/gas line. The mining depth was assumed to be 21 feet in this area based on bore log information. Case S-4 — Fence east of the south mining cell. The mining operation is adjacent to a fence on the north side of the south mining cell. The proposed setback for mining is 100 feet from the fence. The mining depth was assumed to be 22 feet in this area based on bore log information. Case S-5 — Oil/gas line south of the south mining cell. The mining operation is adjacent to an oil/gas line on the north side of the south mining cell. The proposed setback for mining is 50 feet from the oil/gas line. The mining depth was assumed to be 22 feet in this area based on bore log information. 1Z1Northern Colorado Constructors, Inc.-NCCI Pit#1 J&T Consulting, Inc. Slope Stabilitya Analysis3 9 The cross-sections located in Appendix B show the estimated phreatic surface associated with each case, the geometry used in the mining/reclamation, and the locations of the man-made structures adjacent to the mining slopes. V. METHODOLOGY The mining and reclaimed embankment configurations shown in the computer analysis represents the estimated conditions for this site. If mining conditions differ from the estimated conditions, the slope stability will need to be re-evaluated on a case-by-case basis. The Bishop Method was used in the computer analysis for determining safety factors. The procedure searches for circular shear failures and automatically searches for the lowest safety factor. 20,000 separate failure surfaces were analyzed for each case. The required minimum safety factors are based on the policy of the Mined Land Reclamation Board (MLRB) for Factors of Safety for Slope Stability / Geotechnical Analyses. VI. SLOPE STABILITY RESULTS When estimated soil strength parameters are used, the MLRB requires minimum safety factors of 1.50 for static condition analyses and 1.30 for pseudo-static (earthquake loading) condition analyses for embankments adjacent to critical structures. The calculated factors of safety are within the design criteria specified for this project and can be considered indicators of the mining and reclaimed slope performance under the various conditions. The results of the static condition and pseudo-static condition slope stability analyses are shown in Tables 2, 3, 4, and 5 below. Northern Colorado Constructors, Inc.-NCCI Pit#1 r J&T Consulting, Inc. Slope Stabilitya Analysis4 9 MINING CONDITIONS TABLE 2: STATIC CONDITION SLOPE STABILITY ANALYSIS RESULTS Calculated Required Description Factor Minimum of Safety Factor of Safety Case NE-1 — Oil/gas wells southwest of the northwest mining cell 2.56 1.50 — Static Case NE-2 — Fence north of the northeast mining cell — Static 3.08 1.50 Case NE-3— Electric power pole and WCR 25 east of the 2.60 1.50 northeast mining cell — Static Case NW-1 — Oil/gas wells southwest of the northwest mining 4.49 1.50 cell — Static Case NW-2 —Oil/gas lines northwest of the northwest mining cell 2.97 1.50 — Static Case NW-3 —Oil/gas line and irrigation ditch northeast of the 2.69 1.50 northwest mining cell —Static Case NW-4 — Oil/gas wells southeast of the northwest mining 4.63 1.50 cell — Static Case S-1 — Oil/gas line and electric power pole west of the south 3.13 1.50 mining cell — Static Case S-2 — Fence and oil/gas equipment west of the south 4.37 1.50 mining cell — Static Case S-3 — Oil/gas line north of the south mining cell — Static 2.86 1.50 Case S-4 — Fence east of the south mining cell — Static 3.65 1.50 Case S-5— Oil/gas line south of the south mining cell —Static 2.75 1.50 Northern Colorado Constructors, Inc.—NCCI Pit#1 Slope Consulting, Inc. Stability Analysis Page MINING CONDITIONS TABLE 3: PSEUDO-STATIC CONDITION SLOPE STABILITY ANALYSIS RESULTS Calculated Required Description Factor Minimum of Safety Factor of Safety Case NE-1 — Oil/gas wells southwest of the northwest mining cell 1.69 1.30 — Pseudo-static Case NE-2 — Fence north of the northeast mining cell — Pseudo- 1.81 1.30 static Case NE-3— Electric power pole and WCR 25 east of the 1.70 1.30 northeast mining cell — Pseudo-static Case NW-1 — Oil/gas wells southwest of the northwest mining 2.40 1.30 cell — Pseudo-static Case NW-2 —Oil/gas lines northwest of the northwest mining cell 2.05 1.30 — Static Case NW-3 —Oil/gas line and irrigation ditch northeast of the 1.81 1.30 northwest mining cell — Pseudo-static Case NW-4 — Oil/gas wells southeast of the northwest mining 2.40 1.30 cell — Pseudo-static Case S-1 — Oil/gas line and electric power pole west of the south 2.16 1.30 mining cell — Pseudo-static Case S-2 — Fence and oil/gas equipment west of the south 2.56 1.30 mining cell — Pseudo-static Case S-3— Oil/gas line north of the south mining cell — Pseudo- 2.06 1.30 static Case S-4 — Fence east of the south mining cell — Pseudo-static 2.29 1.30 Case S-5— Oil/gas line south of the south mining cell — Pseudo- 1.97 1.30 static Northern Colorado Constructors, Inc.—NCCI Pit#1 Slope Consulting, Inc. Stability Analysis Page RECLAIMED CONDITIONS TABLE 4: STATIC CONDITION SLOPE STABILITY ANALYSIS RESULTS Calculated Required Description Factor Minimum of Safety Factor of Safety Case NE-1 — Oil/gas wells southwest of the northwest mining cell Backfilled N/A — Static Case NE-2 — Fence north of the northeast mining cell — Static Backfilled N/A Case NE-3— Electric power pole and WCR 25 east of the Backfilled N/A northeast mining cell — Static Case NW-1 — Oil/gas wells southwest of the northwest mining 4.28 1.50 cell — Static Case NW-2 —Oil/gas lines northwest of the northwest mining cell 2.71 1.50 — Static Case NW-3 —Oil/gas line and irrigation ditch northeast of the 2.53 1.50 northwest mining cell —Static Case NW-4 — Oil/gas wells southeast of the northwest mining 4.50 1.50 cell — Static Case S-1 — Oil/gas line and electric power pole west of the south 2.86 1.50 mining cell — Static Case S-2 — Fence and oil/gas equipment west of the south 4.15 1.50 mining cell — Static Case S-3 — Oil/gas line north of the south mining cell — Static 2.63 1.50 Case S-4 — Fence east of the south mining cell — Static 3.44 1.50 Case S-5— Oil/gas line south of the south mining cell —Static 2.51 1.50 Northern Colorado Constructors, Inc.—NCCI Pit#1 Slope Consulting, Inc. Stability Analysis Page RECLAIMED CONDITIONS TABLE 5: PSEUDO-STATIC CONDITION SLOPE STABILITY ANALYSIS RESULTS Calculated Required Description Factor Minimum of Safety Factor of Safety Case NE-1 — Oil/gas wells southwest of the northwest mining cell Backfilled N/A — Pseudo-static Case NE-2 — Fence north of the northeast mining cell — Pseudo- Backfilled N/A static Case NE-3— Electric power pole and WCR 25 east of the Backfilled N/A northeast mining cell — Pseudo-static Case NW-1 — Oil/gas wells southwest of the northwest mining 2.27 1.30 cell — Pseudo-static Case NW-2 —Oil/gas lines northwest of the northwest mining cell 1.87 1.30 — Static Case NW-3 —Oil/gas line and irrigation ditch northeast of the 1.69 1.30 northwest mining cell — Pseudo-static Case NW-4 — Oil/gas wells southeast of the northwest mining 2.32 1.30 cell — Pseudo-static Case S-1 — Oil/gas line and electric power pole west of the south 1.97 1.30 mining cell — Pseudo-static Case S-2 — Fence and oil/gas equipment west of the south 2.44 1.30 mining cell — Pseudo-static Case S-3— Oil/gas line north of the south mining cell — Pseudo- 1.89 1.30 static Case S-4 — Fence east of the south mining cell — Pseudo-static 2.16 1.30 Case S-5— Oil/gas line south of the south mining cell — Pseudo- 1.80 1.30 static The Galena analysis output files are included in Appendix C for all cases. Northern Colorado Constructors, Inc.—NCCI Pit#1 Slope Consulting, Inc. Stability Analysis Page VII. CONCLUSIONS AND RECOMMENDATIONS MINING CONDITIONS Case NE-1 — At a setback of 25 feet, the lowest resulting static condition safety factor of 2.56 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 1.69 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 25 feet from the irrigation ditch is satisfactory. Case NE-2 — At a setback of 57 feet, the lowest resulting static condition safety factor of 3.08 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 1.81 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 57 feet from the fence is satisfactory. Case NE-3 — At a setback of 28 feet, the lowest resulting static condition safety factor of 2.60 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 1.70 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 28 feet from the electric power pole is satisfactory. Case NW-1 — At a setback of 175 feet, the lowest resulting static condition safety factor of 4.49 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 2.40 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 175 feet from the oil/gas wells is satisfactory. Case NW-2 —At a setback of 54 feet, the lowest resulting static condition safety factor of 2.97 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 2.05 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 54 feet from the oil/gas lines is satisfactory. Case NW-3 —At a setback of 76 feet, the lowest resulting static condition safety factor of 2.69 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 1.81 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 76 feet from the oil/gas line is satisfactory. Northern Colorado Constructors, Inc.-NCCI Pit#1 J&T Consulting, Inc. Slope Stability Analysis r g Case NW-4 — At a setback of 175 feet, the lowest resulting static condition safety factor of 4.63 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 2.40 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 175 feet from the oil/gas wells is satisfactory. Case S-1 — At a setback of 50 feet, the lowest resulting static condition safety factor of 3.13 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 2.16 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 50 feet from the oil/gas line is satisfactory. Case S-2 — At a setback of 132 feet, the lowest resulting static condition safety factor of 4.37 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 2.56 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 132 feet from the fence line is satisfactory. Case S-3 — At a setback of 50 feet, the lowest resulting static condition safety factor of 2.86 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 2.06 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 50 feet from the oil/gas line is satisfactory. Case S-4 — At a setback of 100 feet, the lowest resulting static condition safety factor of 3.65 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 2.29 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 100 feet from the fence line is satisfactory. Case S-5 — At a setback of 50 feet, the lowest resulting static condition safety factor of 2.75 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 1.97 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 50 feet from the oil/gas line is satisfactory. Northern Colorado Constructors, Inc.-NCCI Pit#1 r J&T Consulting, Inc. Slope Stability PaAnge 10 9 RECLAIMED CONDITIONS Case NE-1 — Backfilled. Case NE-2 — Backfilled Case NE-3 — Backfilled Case NW-1 — At a setback of 175 feet, the lowest resulting static condition safety factor of 4.28 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 2.27 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 175 feet from the oil/gas wells is satisfactory. Case NW-2 —At a setback of 54 feet, the lowest resulting static condition safety factor of 2.71 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 1.87 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 54 feet from the oil/gas lines is satisfactory. Case NW-3 —At a setback of 76 feet, the lowest resulting static condition safety factor of 2.53 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 1.69 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 76 feet from the oil/gas line is satisfactory. Case NW-4 — At a setback of 175 feet, the lowest resulting static condition safety factor of 4.50 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 2.32 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 175 feet from the oil/gas wells is satisfactory. Case S-1 — At a setback of 50 feet, the lowest resulting static condition safety factor of 2.86 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 1.97 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 50 feet from the oil/gas line is satisfactory. Case S-2 — At a setback of 132 feet, the lowest resulting static condition safety factor of 4.15 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a 1Z1Northern Colorado Constructors, Inc.-NCCI Pit#1 J&T Consulting, Inc. Slope Stability PaAnge 11 9 critical structure. The lowest resulting pseudo-static condition safety factor of 2.44 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 132 feet from the fence line is satisfactory. Case S-3 — At a setback of 50 feet, the lowest resulting static condition safety factor of 2.63 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 1.89 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 50 feet from the oil/gas line is satisfactory. Case S-4 — At a setback of 100 feet, the lowest resulting static condition safety factor of 3.44 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 2.16 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 100 feet from the fence line is satisfactory. Case S-5 — At a setback of 50 feet, the lowest resulting static condition safety factor of 2.51 exceeds the MLRB minimum requirement of 1.50 for an embankment adjacent to a critical structure. The lowest resulting pseudo-static condition safety factor of 1.80 exceeds the MLRB minimum requirement of 1.30 for an embankment adjacent to a critical structure subject to earthquake loading. The proposed setback of 50 feet from the oil/gas line is satisfactory. Northern Colorado Constructors, Inc.-NCCI Pit#1 r J&T Consulting, Inc. Slope Stability PaAnge 12 9 The following recommendations for monitoring of slope stability should be followed: 1. A visual inspection of the excavated slopes should be done on a weekly basis for the duration of mining. This inspection should consist of walking the existing ground and looking for any signs of stress cracks or other potential signs of slope failure. Some minor sloughing of slopes is expected on any mine site. The intent of this inspection is to locate potential major slope failures that could potentially extend back into a structure. 2. A visual inspection should be done after a major precipitation event that has saturated the ground using the same procedures. A major precipitation event would be defined as a storm that produces an intensity level reached once in 50 years on the average. 3. If a visual inspection detects signs of a potential slope failure, qualified personnel should be contacted to evaluate and recommend remediation work to stabilize the area. 4. If no visible signs of slope failure are detected during mining, then the inspection period could be reduced to once per 6 months after mining completion, or after every major precipitation event. Northern Colorado Constructors, Inc.-NCCI Pit#1 r J&T Consulting, Inc. Slope Stability PaAnge 13 9 APPENDIX A Rim Northern Colorado Constructors, Inc.—NCCI Pit#1 J&T Consulting, Inc. Slope Stability Analysis �J L (REC. 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NO. 1879198) I I �.� I / \\1 / / E sc-12HZ REPEAT OF LOTS 8, 9, & 10 co I ° OF THE LUPTON MEADOWS LAND CO. cal I 1 / / 1 -- 1 / / ,^-/ 18N=25HZ \-t\\ 30' ROW N y / 1 --- \ / G E -76C-25HZ \c^\\ I \ 30' ROWS I-.— o. 1 A�/ / v / / C,-10 '. , /- \\\\` 0 N 1 I 1 _ v / /-- \ 48:g0 1 I t / \ \\ s 13 a I ��_ .........�4855 / / / // / \\-zo\\N ��- °,.kph I. i I 11 Imo`; _�� 6° \\\ _0 0 p I 'I I I ;� / �� -- - 30;PIPELINE / / / 0/"�/ \A" \\� 0 v 1B \1 - - - _ EASEMENT ' / / / ��,/��1 >� MN� ��A�V o� y W I I 1 LLIAM E GEE _ .�. \\� ��/-/ / / /// ✓' I �;: \ \ \\\\`\ i H c • d CO I •s UNIT#1 i . ■ _�� J �o' \ \\ Z O U I 1 I PTANK BATTERY . 11/14/20 ------------��`._ ��/ / -\ /, O'n \\ T. /� ��ggcc SEPARATOR , -- �/ /// \9,,,, \ / i y ,� \ 1`SURFACE USE / `- yj \ I 1 I EC.NO.3955813) I / `gg -OIL/GAS ___ , /.r h6' Z CO N Nv I \ I 1 Z,S say LINE, �'/ sNE° 1 H 4., 10 cr) o CO \\ o W \�845` • \ \\ \ 1 2 I OD ,1Will\ III �� J .�♦ �I A\�w� , \\, \ \\\ \\\-,, p1 I FENCE & OIL/GAS - \\ \_ I I ,.I 1 �r=1 j EQUIPMENT \` ` \ / / \ \ a0. vi I I : 1I �Ei; 7 / v /v 1 // \ \ �, --� o _ / __ __ _ ._, *- or- \II 11 '� - . -II / // \/ \`-/ _- I I Y S89'45'11"W 376.07' Q I - - - N - ci) V1 I UNITED POWER / ��$ $`4 I - \\- 0 ° g 1 II I „" EASEMENT / I I Z 11 (REC. NO. 4143932)/ / p,I " FENCE \� 5 ~ I11 II ,I �G 8 /�% RG-5 \ u P I SOUTH CELL \ - III // ' U • I x -4860 1\ / LOT 8 a 11 . o co I III II I / ' \ � � /� V —� — � �� 2 1 I J N1 DIVISION NO. 3 �G-50 III 1 / 1 \ G-4 / I p I/ r° (REC. NO. 1879198) CO \ I REPEAT OF LOTS 8, 9, & 10 y III i i I (-/ \/ ` \ ` L OF THE LUPTON MEADOWS LAND CO. mLL�� z0 s rt I 111;1 I A A 1 1 ' m /1 I UT I g /'A I I 1 rcn n //II 1 OIL/GAS LINE & I I 4 ELEC POWER POLE 3 I VI I II I 1 1.S / N1 I a -eI 86Y v I 0 N3 CO GEC �p I //� 1 Oo 1T o ' G7 ¢ I 0_ z I 4845 \ J 0= le:in:7 23onN v1 ` 4850 -� \ ,-OIL/GAS G-`Y Q c� D 1.22.26 CD ��4855 \�� LJNE / k s" � D TPY U I I N '� J4) Z a D By TPY - / ° C) cBB: JCY Z -- - - - FCC JT NCC r 0-- 0 - - 5}862 9 - 0- —�0 — ��0 — M I V Scale As Shown O _ - ---- - - - --• J -- _- -1" I '_iHiMffiNNHi HfHfN SIGH N■ - - -Gee-SS dwg o I I �� — - —G .. —-G S89.4n s 1>47.1z _ — — r �` �___ __== Sheet: Of: 100 50 0 100 200 300 d --�- _.-__ -r _ H WIFF IGifHflf= - G - - -*NINNY ---ffSSf-7E---H SCALE IN FEET 1 1 PIPELINE EASEMENT \ ~ff i�f.•ff APPENDIX B Rim Northern Colorado Constructors, Inc.—NCCI Pit#1 J&T Consulting, Inc. Slope Stability Analysis Mining Conditions m m Northern Colorado Constructors, Inc.—NCCI Pit#1 J&T Consulting, Inc. Slope Stability Analysis Material Keys 1:Clay(c:50 0:25 g:100) Sat f3 4920 2:Sand and Gravel(c:10 0:35 g:115) Sat D 4900 4880 25ft J m 4860 4840 4820 4800 Analysis 1 Multiple Stability Analysis Method: Bishop Simplified 4780 Surface: Circular Results 0 20 40 60 80 100 120 140 160 180 Critical Factor of Safety: 2.56 GALENA Version 7.2 Licensed to:J&T Consulting ProjectEdited: 22 Jan 2026 NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NE-1 -Mining Conditions-Static I in J�7 Cnnsullin�,Inc, File:C:\Galena Models\NCC Pill-NE1-Mining.gmf ' Material Keys 1:Clay(c:50 0:25 g:100) Sat fE 4920 2:Sand and Gravel(c:10 0:35 g:115) Sat D 4900 /=72 4880 25ft J m ‹.24860 o 4840 4820 4800 Analysis 1 Multiple Stability Analysis Method: Bishop Simplified 4780 Surface: Circular Results 0 20 40 60 80 100 120 140 160 180 Critical Factor of Safety: 1.69 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 rotect NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NE-1 -Mining Conditions-Pseudo Static I in File:C:\Galena Models\NCC Pill-NE1-Mining-EQ.gmf ' J�7 Cnnsulling,Inc, Material Keys 1:Clay(c:50 0:25 g:100) Sat D 2:Sand and Gravel(c:10 0:35 g:115) Sat D 4920 4900 4880 57ft C C 4860 LL 4840 4820 4800 4780 Analysis 1 Multiple Stability Analysis Method: Bishop Simplified 4760 Surface: Circular Results 0 20 40 60 80 100 120 140 160 180 200 220 Critical Factor of Safety: 3.08 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 rotect NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NE-2-Mining Conditions-Static I in J�7 Cnnsullin�,Inc, File:C:\Galena Models\NCC Pit1-NE2-Mining.gmf ' Material Keys 1:Clay(c:50 0:25 g:100) Sat D 2:Sand and Gravel(c:10 0:35 g:115) Sat D 4920 4 4900 4880 57ft C 4860 LL 4840 4820 4800 4780 Analysis 1 Multiple Stability Analysis Method: Bishop Simplified 4760 Surface: Circular Results 0 20 40 60 80 100 120 140 160 180 200 220 Critical Factor of Safety: 1.81 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 rotect NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NE-2-Mining Conditions-Pseudo Static I in J�7 Cnnsullin�,Inc, File:C:\Galena Models\NCC Pit1-NE2-Mining-EQ.gmf ' Material Keys 1:Clay(c:50 0:25 g:100) Sato 2:Sand and Gravel(c:10 0:35 g:115) Sat D 4920 4900 4880 28 ft 13 ft 28 ft a a tit E m O O =i U N N N 4860 4840 4820 4800 Analysis 1 Multiple Stability Analysis 4780 Method: Bishop Simplified Surface: Circular Results 0 20 40 60 80 100 120 140 160 180 200 Critical Factor of Safety: 2.60 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 rotect NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NE-3-Mining Conditions-Static I in J�7 Cnnsullin�,Inc, File:C:\Galena Models\NCC Pit1-NE3-Mining.gmf ' Material Keys 1:Clay(c:50 0:25 g:100) Sat D 2:Sand and Gravel(c:10 0:35 g:115) Sat D 4920 0.072 /— 4900 4880 28 ft )1( 13 ft I, 28 ft rl a E ku O O J O W W O> L N N N CC K 4860 w 4840 _ daggligilliTIPPV- 4820 4800 Analysis 1 Multiple Stability Analysis 4780 Method: Bishop Simplified Surface: Circular Results 0 20 40 60 80 100 120 140 160 180 200 Critical Factor of Safety: 1.70 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 rotect NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NE-3-Mining Conditions-Pseudo Static File:C:1Galena Models\NCC Pit1-NE3-Mining-EQ.gmf V J�7 Cnnsullin�,Inc, Material Keys 1:Clay(c:50 0:25 g:100) 1 1 I I I I I Sat D 2:Sand and Gravel(c:10 0:35 g:115) - — — Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4950 — — 4900 — — 175ft d 7 fo J , ` o. 4850 — 'I — 1 J 4800 — — 4750 — — Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular Results 0 50 100 150 200 250 300 Critical Factor of Safety: 4.49 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 roject NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NW-1 -Mining Conditions-Static qi- .3 T Consulting,Inc. File:C:\Galena Models\NCC Pit1-NW1-Mining.gmf 64 Material Keys 1:Clay(c:50 0:25 g:100) 1 1 I I I I I Sat D 2:Sand and Gravel(c:10 0:35 g:115) - — — Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4950 — i 4900 — 175ft J O> C� V o . ,— f 4850 — II I 4800 — 4750 — Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 1 I I I Results 0 50 100 150 200 250 300 Critical Factor of Safety: 2.40 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 roject NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NW-1 -Mining Conditions- Pseudo Static 141- 3OT Consulting,Inc. File:C:1Galena Models\NCC Pit1-NW1-Mining-EQ.gmf Material Keys 1:Clay(c:50 0:25 g:100) Sat 0 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) 4920 Sat D 4900 4880 54 ft * 14 5 C — CD J j J J m 4860 o 0 4840 �QI 4820 4800 4780 Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4760 Results 0 20 40 60 80 100 120 140 160 180 200 220 Critical Factor of Safety: 2.97 GALENA Version 7.2 Licensed to:J&T Consulting ProjectEdited: 22 Jan 2026 NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NW-2-Mining Conditions-Static I in File:C:\Galena Models\NCC Pit1-NW2-Mining.gmf lid' J T Consulting,Inc, Material Keys 1:Clay(c:50 0:25 g:100) Sat 0 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) 4920 Sat0.072 D 4 4900 4880 54 ft * 14 5 C — CD J j J J m 4860 o 0 4840 �QI 4820 4800 4780 Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4760 Results 0 20 40 60 80 100 120 140 160 180 200 220 Critical Factor of Safety: 2.05 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 rotect NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NW-2-Mining Conditions-Pseudo Static I in File:C:\Galena Models\NCC Pit1-NW2-Mining-EQ.gmf lid' J T Consulting,Inc, Material Keys 1:Clay(c:50 0:25 g:100) I 1 f I I I I I I 1 I ISato 4940 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4920 4900 4880 76 ft 35 ft co :::: 4820 4800 4780 Analysis 1 Multiple Stability Analysis 4760 Method: Bishop Simplified Surface: Circular 4740 Results 0 20 40 60 80 100 120 140 160 180 200 220 240 Critical Factor of Safety: 2.69 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 rotect NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NW-3-Mining Conditions-Static I in File:C:\Galena Models\NCC Pit1-NW3-Mining.gmf lid' Jek7 Consulting,Inc, Material Keys 1:Clay(c:50 0:25 g:100) Sat D 4940 2:Sand and Gravel(c:10 0:35 g:115) - — — Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4920 0.072 4900 4880 76 ft 35 ft E T. J C J ? m it 0 L 4860 03 o 0 4840 4820 4800 4780 Analysis 1 Multiple Stability Analysis 4760 4740 Method: Bishop Simplified Surface: Circular Results 0 20 40 60 80 100 120 140 160 180 200 220 240 Critical Factor of Safety: 1.81 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 roject NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NW-3-Mining Conditions- Pseudo Static 141- 3OT Consulting,Inc. File:C:1Galena Models\NCC Pit1-NW3-Mining-EQ.gmf Material Keys 1:Clay(c:50 0:25 g:100) I I I I I I I Sat D 2:Sand and Gravel(c:10 0:35 g:115) - — — Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4950 - - 4900 - - 175ft t 0,Or 4850 - - 4800 iall __. - 4750 _ Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular Results 0 50 100 150 200 250 300 Critical Factor of Safety: 4.63 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 roject NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NW-4-Mining Conditions-Static qi- 3&T Consulting,Inc. File:C:\Galena Models\NCC Pitl-NW4-Mining.gmf 64 Material Keys 1:Clay(c:50 0:25 g:100) Sat D 2:Sand and Gravel(c:10 0:35 g:115) — — Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4950 0.072 4900 175ft d E m � � m O 4850 4800 4750 Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular Results 0 50 100 150 200 250 300 Critical Factor of Safety: 2.40 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 roject NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case NW-4-Mining Conditions- Pseudo Static - 3OT Consulting,Inc. File:C:1Galena Models\NCC Pitl-NW4-Mining-EQ.gmf Material Keys 1:Clay(c:50 0:25 g:100) I 1 1 I I I I I I I I Sat ID 2:Sand and Gravel(c:10 0:35 g:115) - — — Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4920 — 4900 — 4880 — 50ft X 29ft d 0 fu J a Vl C U i . O nA rn 4860 — > 4840 — --411degalifilliggi 4820 — 4800 — Analysis 1 Multiple Stability Analysis 4780 — Method: Bishop Simplified Surface: Circular 1 I I I 1 Results 0 20 40 60 80 100 120 140 160 180 200 Critical Factor of Safety: 3.13 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 roject NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case S-1 -Mining Conditions-Static L- 3ekT Consulting.Inc. File:C:\Galena Models\NCC Pit1-S1-Mining.gmf Material Keys 1:Clay(c:50 0:25 g:100) I 1 1 I I I I I I I I Sat ID 2:Sand and Gravel(c:10 0:35 g:115) - — — Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4920 — 0.072 - 4900 — 4880 — 50ft X 29ft d 0 f. J a Vl C N U i U O nA rn 4860 — > 4840 — --411degalifilliggi 4820 — 4800 — Analysis 1 Multiple Stability Analysis 4780 — Method: Bishop Simplified Surface: Circular 1 I I I 1 Results 0 20 40 60 80 100 120 140 160 180 200 Critical Factor of Safety: 2.16 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 roject NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case S-1 -Mining Conditions-Pseudo Static L- 3&T Consulting.Inc. File:C:\Galena Models\NCC Pitl-S1-Mining-EQ.gmf Material Keys 1:Clay(c:50 0:25 g:100) Sat D 2:Sand and Gravel(c:10 0:35 g:115) Sat D 4960 3:Slurry Wall(c:0 0:45 g:100) Sat D 4940 4920 4900 132ft 7ft 4880 E � w L O 4860 4840 4820 4800 4780 Analysis 1 4760 Multiple Stability Analysis Method: Bishop Simplified 4740 Surface: Circular Results 0 50 100 150 200 250 300 Critical Factor of Safety: 4.37 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 rotect NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case S-2-Mining Conditions-Static I in File:C:\Galena Models\NCC lid' JA7 Cnnsulling,Inc, Material Keys 1:Clay(c:50 0:25 g:100) Sat D 2:Sand and Gravel(c:10 0:35 g:115) Sat D 4960 3:Slurry Wall(c:0 0:45 g:100) Sat D 4940 2 41 4920 4900 132ft 7ft 4880 E � w LL O 4860 '- 4840 4820 4800 4780 Analysis 1 4760 Multiple Stability Analysis Method: Bishop Simplified 4740 Surface: Circular Results 0 50 100 150 200 250 300 Critical Factor of Safety: 2.56 GALENA Version 7.2 Licensed to:J&T Consulting P Edited: 22 Jan 2026 rotect NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case S-2-Mining Conditions-Pseudo Static I in J�7 Cnnsullin�,Inc, File:C:\Galena Models\NCC Pit1-S2-Mining-EQ.gmf ' Material Keys 4940- 1 I I I I I I I I I I 1:Clay(c:50 0:25 g:100) Sat D 2:Sand and Gravel(c:10 0:35 g:115) - Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4920 — — 4900 — — 4880 — < 50 ft ) — m J 'E � C3 � J ; Ol C E' O 4860 — 4840 — ..iiiiiill 111 pi/1'F- 4820 — — 4800 — — Analysis 1 4780 — _ Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4760 — L I I I I I I I I I I Results 0 20 40 60 80 100 120 140 160 180 200 Critical Factor of Safety: 2.86 GALENA Version 7.2 Licensed to:J&T Consulting ProjectEdited: 22 Jan 2026 NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case S-3-Mining Conditions-Static ql- 3OT Consulting.Inc. File:C:\Galena Models\NCC Pitl-S3-Mining.gmf Material Keys 4940- 1 I I I I I I I I I I 1:Clay(c:50 0:25 g:100) Sat D 2:Sand and Gravel(c:10 0:35 g:115) - Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4920 — — 0.072 4900 — — 4880 — < 50 ft ) — m J 'E � C3 � J ; Ol C E' O 4860 — 4840 — ..iiiiiill 111 pi/1'F- 4820 — — 4800 — — Analysis 1 4780 — _ Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4760 — L I I I I I I I I I I Results 0 20 40 60 80 100 120 140 160 180 200 Critical Factor of Safety: 2.06 GALENA Version 7.2 Licensed to:J&T Consulting ProjectEdited: 22 Jan 2026 NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case S-3-Mining Conditions-Pseudo Static ql- 3OT Consulting.Inc. File:C:\Galena Models\NCC Pitl-S3-Mining-EQ.gmf Material Keys 1:Clay(c:50 0:25 g:100) 4960 Sat D 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) 4940 Sat 4920 4900 4880 100 ft 8 4860 LL r 4840 4820 4800 4780 Analysis 1 Multiple Stability Analysis 4760 Method: Bishop Simplified Surface: Circular 4740 Results 0 50 100 150 200 250 Critical Factor of Safety: 3.65 GALENA Version 7.2 Licensed to:J&T Consulting ProjectEdited: 22 Jan 2026 NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case S-4-Mining Conditions-Static File:C:\Galena Models\NCC Pit1-S4-Mining.gmf in JET Cnnsulling,Inc, Material Keys 1:Clay(c:50 0:25 g:100) 4960 Sat D 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) 4940 Sat0.072 4 4920 4900 4880 100 ft 8 S d 4860 LL r 4840 4820 4800 4780 Analysis 1 Multiple Stability Analysis 4760 Method: Bishop Simplified Surface: Circular 4740 Results 0 50 100 150 200 250 Critical Factor of Safety: 2.29 GALENA Version 7.2 Licensed to:J&T Consulting ProjectEdited: 22 Jan 2026 NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case S-4-Mining Conditions-Pseudo Static in JET Cnnsullin�,Inc, File:C:\Galena Models\NCC Pit1-S4-Mining-EQ.gmf ' Material Keys 1:Clay(c:50 0:25 g:100) 4940 Sat 0 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4920 4900 50 ft 4880 E m a 4860 4840 4820 4800 Analysis 1 4780 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4760 Results 0 20 40 60 80 100 120 140 160 180 200 220 Critical Factor of Safety: 2.75 GALENA Version 7.2 Licensed to:J&T Consulting ProjectEdited: 22 Jan 2026 NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case S-5-Mining Conditions-Static File:C:\Galena Models\NCC Pit1-S5-Mining.gmf in J T Consulting,Inc, Material Keys 1:Clay(c:50 0:25 g:100) 4940 Sat 0 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4920 4 4900 50 ft 4880 E m En 4860 4840 4820 4800 Analysis 1 4780 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4760 Results 0 20 40 60 80 100 120 140 160 180 200 220 Critical Factor of Safety: 1.97 GALENA Version 7.2 Licensed to:J&T Consulting ProjectEdited: 22 Jan 2026 NCCI Pit 1 Processed: 22 Jan 2026 Slope Stability-Case S-5-Mining Conditions-Pseudo Static in File:C:\Galena Models\NCC Pit1-S5-Mining-EQ.gmf ' J T Consulting,Inc, Reclaimed Conditions Rim Northern Colorado Constructors, Inc.—NCCI Pit#1 J&T Consulting, Inc. Slope Stability Analysis Material Keys 1:Clay(c:50 0:25 g:100) I I I I I Sat D 4960 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4940 4920 4900 175 ft 4880 J � N f0 m T 0 C � C ? O 4860 (73 4840 4820 4800 4780 Analysis 1 4760 Multiple Stability Analysis Method: Bishop Simplified 4740 Surface: Circular Results 0 50 100 150 200 250 300 Critical Factor of Safety: 4.28 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case NW-1 -Reclaimed Conditions-Static J&T ConsullIog,Luc. File:C:\Galena Models\NCC Pit1-NW1-Rec.gmf id Material Keys 1:Clay(c:50 0:25 g:100) I I I I I Sat D 4960 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4940 0.072 4920 4900 175 ft 4880 J � N f0 m T 0 C � C ? O 4860 (73 4840 4820 4800 4780 Analysis 1 4760 Multiple Stability Analysis Method: Bishop Simplified 4740 Surface: Circular Results 0 50 100 150 200 250 300 Critical Factor of Safety: 2.27 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case NW-1 -Reclaimed Conditions-Pseudo Static J&T ConsullIog,Luc. File:C:\Galena Models\NCC Pit1-NW1-Rec-EQ.gmf id Material Keys 1:Clay(c:50 0:25 g:100) Sat D 4920 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4900 4880 54ft 14ft -E E J N y C Ur Ur 4860 0 0 4840 'r 4820 4800 Analysis 1 Multiple Stability Analysis 4780 Method: Bishop Simplified Surface: Circular Results 0 20 40 60 80 100 120 140 160 180 200 220 Critical Factor of Safety: 2.71 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case NW-2-Reclaimed Conditions-Static J&T ConsullIog,hie. File:C:\Galena Models\NCC Pitl-NW2-Rec.gmf u I Material Keys 1:Clay(c:50 0:25 g:100) Sat D 4920 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4900 072 4880 54ft 14ft a, a, E — c E J N y m T m C U• Ur 4860 C 0 0 4840 _. igiggligilliiiiiirm 4820 4800 Analysis 1 Multiple Stability Analysis 4780 Method: Bishop Simplified Surface: Circular Results 0 20 40 60 80 100 120 140 160 180 200 220 Critical Factor of Safety: 1.87 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case NW-2-Reclaimed Conditions-Pseudo Static J&T ConsullIog,hie. File:C:\Galena Models\NCC Pit1-NW2-Rec-EQ.gmf u I Material Keys 1:Clay(c:50 0:25 g:100) Sat D 2:Sand and Gravel(c:10 0:35 g:115) Sat D 4920 3:Slurry Wall(c:0 0:45 g:100) Sat D 4900 4880 76 ft 35 ft d E• ID to 4860 CI, o 4840 4820 4800 4780 Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4760 Results 0 20 40 60 80 100 120 140 160 180 200 220 240 Critical Factor of Safety: 2.53 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case NW-3-Reclaimed Conditions-Static J&T ConsullIog,hie. File:C:\Galena Models\NCC Pill-NW3-Rec.gmf id Material Keys 1:Clay(c:50 0:25 g:100) Sat D 2:Sand and Gravel(c:10 0:35 g:115) Sat D 4920 3:Slurry Wall(c:0 0:45 g:100) Sat D 0.072 4900 4880 76 ft X 35 ft d Y 0 .J C N co O N 0 4860 co o 0 — 4840 4820 4800 4780 Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4760 Results 0 20 40 60 80 100 120 140 160 180 200 220 240 Critical Factor of Safety: 1.69 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case NW-3-Reclaimed Conditions-Pseudo Static J&T Consutilog,hie. File:C:\Galena Models\NCC Pitl-NW3-Rec-EQ.gmf id Material Keys 1:Clay(c:50 0:25 g:100) I I I I I I Sat D 4960 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4940 4920 4900 175 ft 4880 — 4860 4840 4820 4800 4780 Analysis 1 4760 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4740 Results 0 50 100 150 200 250 300 Critical Factor of Safety: 4.50 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case NW-4-Reclaimed Conditions-Static J&T ConsullIog,hie. File:C:\Galena Models\NCC Pill-NW4-Rec.gmf u' Material Keys 1:Clay(c:50 0:25 g:100) I I I I I I Sat D 4960 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4940 0.072 4920 4900 175 ft 4880 — C 4860 4840 4820 4800 4780 Analysis 1 4760 Multiple Stability Analysis Method: Bishop Simplified 4740 Surface: Circular Results 0 50 100 150 200 250 300 Critical Factor of Safety: 2.32 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case NW-4-Reclaimed Conditions-Pseudo Static J&T ConsullIog,hie. File:C:\Galena Models\NCC Pit1-NW4-Rec-EQ.gmf u' Material Keys 1:Clay(c:50 0:25 g:100) I I I I I I I I I I I Sat D 2:Sand and Gravel(c:10 0:35 g:115) 4920 — Sat D 3:Slurry Wall(c:0 m:45 g:100) im Sat D 4900 — 4880 — E..O>CC 5_>>0 n n( E Jp0_ 29 ft d 4860 — 4840 — .�� 4820 — 4800 — Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4780 — I I I I I I Results 0 20 40 60 80 100 120 140 160 180 200 Critical Factor of Safety: 2.86 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case S-1 -Reclaimed Conditions-Static J&T Cunsutilog,hie. File:C:\Galena Models\NCC Pit1-S1-Rec.gmf id Material Keys 1:Clay(c:50 0:25 g:100) I I I I I I I I I I I Sat D 2:Sand and Gravel(c:10 0:35 g:115) 4920 — Sat D 3:Slurry Wall(c:0 0:45 g:100) im Sat D 0.072 4900 — 4. 4880 — 50 n 29 ft N E _ E m J >� J O C ` 0 U .=r t= = 2 �n O w 4860 — 4840 — — .�� 4820 — 4800 — Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4780 — I I I I I I Results 0 20 40 60 80 100 120 140 160 180 200 Critical Factor of Safety: 1.97 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case S-1 -Reclaimed Conditions-Pseudo Static J&T Consulting,luc. File:C:\Galena Models\NCC Pit1-S1-Rec-EQ.gmf id Material Keys 1:Clay(c:50 0:25 g:100) I I I I I I I Sat D 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) 4940 — — im Sat D 4920 — — 4900 — — 132 ft X-3 n 4880 — Q E w d m , 2 cv L 0 4860 — c7) — - - - - .1 4840 — — — — — — — 4820 — — 4800 — — 4780 — — Analysis 1 Multiple Stability Analysis Method: Bishop Simplified 4760 — — Surface: Circular 1 I I Results 0 50 100 150 200 250 300 Critical Factor of Safety: 4.15 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case S-2-Reclaimed Conditions-Static J&T CunsullIog,lee. File:C:\Galena Models\NCC Pit1-S2-Rec.gmf id Material Keys 1:Clay(c:50 0:25 g:100) Sat D 2:Sand and Gravel(c:10 0:35 g:115) Sat D 4940 3:Slurry Wall(c:0 0:45 g:100) Sat D 0.072 4920 4900 132ft 7ft 4880 = � � w � d m ` cv if o 4860 ` — — — — — J 4840 - - - - - - 4820 4800 4780 Analysis 1 Multiple Stability Analysis Method: Bishop Simplified 4760 Surface: Circular Results 0 50 100 150 200 250 300 Critical Factor of Safety: 2.44 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case S-2-Reclaimed Conditions-Pseudo Static J&T ConsullIog,lee. File:C:\Galena Models\NCC Pit1-S2-Rec-EQ.gmf id Material Keys 1:Clay(c:50 0:25 g:100) I I I I I I I I I I I Sat D 2:Sand and Gravel(c:10 e:35 g:115) 4920 — — Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4900 — — 4880 — 50 ft — a J J N i 4860 — iTtJi — 4840 — _ - - - - - 4820 — — 4800 — 17 — Analysis 1 Multiple Stability Analysis Method: Bishop Simplified 4780 — — Surface: Circular I I 1 I 1 1 I I I j Results 0 20 40 60 80 100 120 140 160 180 200 Critical Factor of Safety: 2.63 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case S-3-Reclaimed Conditions-Static File:C:\Galena Models\NCC Pit1-S3-Rec.gmf Jai Consulting,Inc. Material Keys 1:Clay(c:50 0:25 g:100) I I I I I I I I I I I Sat D 2:Sand and Gravel(c:10 0:35 g:115) 4920 — — Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 0.072 4900 — 4— — 4880 — 50 ft — E J J � �1 �C 4860 — — I 4840 — _ — — — 4820 — 1111111111 — 4800 — — A 1 Multiplenalysis Stability Analysis 17Method: Bishop Simplified 4780 — _ Surface: Circular I I I I I 1 I I I a Results 0 20 40 60 80 100 120 140 160 180 200 Critical Factor of Safety: 1.89 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case S-3-Reclaimed Conditions-Pseudo Static File:C:\Galena Models\NCC Pit1-S3-Rec-EQ.gmf Jai Consulting,Inc. Material Keys 1:Clay(c:50 0:25 g:100) Sat D 4940 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4920 4900 4880 10o n E a a 4860 LL.— 4840 4820 4800 Analysis 1 4780 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4760 Results 0 50 100 150 200 250 Critical Factor of Safety: 3.44 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case S-4-Reclaimed Conditions-Static J&T ConsullIog,hie. File:C:\Galena Models\NCC Pitl-S4-Rec.gmf id Material Keys 1:Clay(c:50 0:25 g:100) Sat D 4940 2:Sand and Gravel(c:10 0:35 g:115) Sat D 3:Slurry Wall(c:0 0:45 g:100) Sat D 4920 0.072 4900 100 ft 4880 • C T U C ] N 4860 LL 4840 4820 4800 Analysis 1 4780 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4760 Results 0 50 100 150 200 250 Critical Factor of Safety: 2.16 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case S-4-Reclaimed Conditions-Pseudo Static J&T ConsullIog,Luc. File:C:\Galena Models\NCC Pit1-S4-Rec-EQ.gmf id Material Keys 1:Clay(c:50 0:25 g:100) Sat D 2:Sand and Gravel(c:10 0:35 g:115) Sat D 4920 3:Slurry Wall(c:0 0:45 g:100) Sat D 4900 50 ft 4880 m J - 6 C e2 0 4860 4840 ��- 4820 4800 Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4780 Results 0 20 40 60 80 100 120 140 160 180 200 220 Critical Factor of Safety: 2.51 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case S-5-Reclaimed Conditions-Static J&T ConsullIog,hie. File:C:\Galena Models\NCC Pitl-S5-Rec.gmf id Material Keys 1:Clay(c:50 0:25 g:100) Sat D 2:Sand and Gravel(c:10 0:35 g:115) Sat D 4920 3:Slurry Wall(c:0 0:45 g:100) Sat D 0.072 4900 50 ft 4880 m J - C 0 0 4860 4840 ��- 4820 4800 Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular 4780 Results 0 20 40 60 80 100 120 140 160 180 200 220 Critical Factor of Safety: 1.80 GALENA Version 7.2 Licensed to:J&T Consulting Edited: 21 Jan 2026 Project NCCI Pit 1 Processed: 21 Jan 2026 Slope Stability-Case S-5-Reclaimed Conditions-Pseudo Static J&T ConsullIog,lnc. File:C:\Galena Models\NCC Pit1-S5-Rec-EQ.gmf id APPENDIX C m m Northern Colorado Constructors, Inc.—NCCI Pit#1 J&T Consulting, Inc. Slope Stability Analysis Mining Conditions m m Northern Colorado Constructors, Inc.—NCCI Pit#1 J&T Consulting, Inc. Slope Stability Analysis GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NEl-Mining.gmf Processed: 22 Jan 2026 09:17:55 DATA: Analysis 1 - Slope Stability - Case NE-1 - Mining Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (3 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4859.00 186.20 4859.00 Profile: 2 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4853.00 186.20 4853.00 Profile: 3 (3 points) Material beneath: 1 - Clay 0.00 4836.30 50.00 4836.50 186.20 4837.20 Slope Surface (12 points) 0.00 4836.30 50.00 4836.50 111.80 4857.10 118.80 4857.10 127.20 4858.40 136.20 4858.40 144.70 4856.30 148.50 4854.00 156.70 4854.00 161.10 4856.60 164.20 4857.20 186.20 4857.40 Phreatic Surface (2 points) 0.00 4854.90 186.20 4854.90 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4836.50 XR: 141.20 YR: 4857.16 Centre: XC: 41.33 YC: 5086.35 Radius: R: 250.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NE-1 - Mining Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.933 Analysis Summary There were: 14333 successful analyses from a total of 20001 trial failure surfaces 5668 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.56 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4836.48 136.20 4858.40 63.52 4960.10 125.00 2.558 <-- Critical Surface 2 45.53 4836.48 136.20 4858.40 63.61 4960.17 125.00 2.563 3 45.00 4836.48 136.73 4858.27 64.11 4960.01 125.00 2.564 4 46.05 4836.48 136.20 4858.40 63.71 4960.23 125.00 2.567 5 45.53 4836.48 136.73 4858.27 64.20 4960.08 125.00 2.569 6 45.00 4836.48 137.25 4858.14 64.69 4959.92 125.00 2.569 7 46.58 4836.49 136.20 4858.40 63.80 4960.29 125.00 2.572 8 46.05 4836.48 136.73 4858.27 64.30 4960.15 125.00 2.573 9 45.53 4836.48 137.25 4858.14 64.78 4959.99 125.00 2.575 10 45.00 4836.48 137.78 4858.01 65.26 4959.83 125.00 2.577 11 46.58 4836.49 136.73 4858.27 64.39 4960.21 125.00 2.578 12 47.11 4836.49 136.20 4858.40 63.88 4960.36 125.00 2.579 13 46.05 4836.48 137.25 4858.14 64.88 4960.06 125.00 2.581 14 47.63 4836.49 136.20 4858.40 63.97 4960.42 125.00 2.581 15 47.11 4836.49 136.73 4858.27 64.48 4960.28 125.00 2.583 16 45.53 4836.48 137.78 4858.01 65.36 4959.90 125.00 2.584 17 45.00 4836.48 136.20 4858.40 62.24 4965.43 130.10 2.585 18 45.00 4836.48 138.31 4857.88 65.84 4959.73 125.00 2.586 19 46.58 4836.49 137.25 4858.14 64.98 4960.12 125.00 2.586 20 48.16 4836.49 136.20 4858.40 64.05 4960.48 125.00 2.587 21 47.63 4836.49 136.73 4858.27 64.57 4960.34 125.00 2.587 22 46.05 4836.48 137.78 4858.01 65.46 4959.97 125.00 2.587 23 45.53 4836.48 136.20 4858.40 62.33 4965.49 130.10 2.588 24 45.00 4836.48 136.73 4858.27 62.84 4965.35 130.10 2.590 25 45.53 4836.48 138.31 4857.88 65.94 4959.80 125.00 2.591 26 47.11 4836.49 137.25 4858.14 65.07 4960.19 125.00 2.591 27 48.68 4836.49 136.20 4858.40 64.14 4960.54 125.00 2.592 28 48.16 4836.49 136.73 4858.27 64.65 4960.40 125.00 2.592 29 46.58 4836.49 137.78 4858.01 65.56 4960.04 125.00 2.593 30 46.05 4836.48 136.20 4858.40 62.41 4965.55 130.10 2.593 31 45.53 4836.48 136.73 4858.27 62.93 4965.42 130.10 2.594 32 45.00 4836.48 138.83 4857.75 66.41 4959.63 125.00 2.595 33 46.05 4836.48 138.31 4857.88 66.04 4959.88 125.00 2.595 34 47.63 4836.49 137.25 4858.14 65.16 4960.26 125.00 2.596 35 49.21 4836.50 136.20 4858.40 64.22 4960.59 125.00 2.596 36 48.68 4836.49 136.73 4858.27 64.74 4960.46 125.00 2.598 37 46.58 4836.49 136.20 4858.40 62.50 4965.61 130.10 2.598 38 45.00 4836.48 137.25 4858.14 63.43 4965.27 130.10 2.599 39 47.11 4836.49 137.78 4858.01 65.66 4960.10 125.00 2.599 40 46.05 4836.48 136.73 4858.27 63.01 4965.48 130.10 2.600 41 45.53 4836.48 138.83 4857.75 66.52 4959.71 125.00 2.600 42 46.58 4836.49 138.31 4857.88 66.14 4959.95 125.00 2.600 43 49.74 4836.50 136.20 4858.40 64.30 4960.65 125.00 2.601 44 48.16 4836.49 137.25 4858.14 65.25 4960.32 125.00 2.601 45 47.11 4836.49 136.20 4858.40 62.58 4965.67 130.10 2.602 46 45.53 4836.48 137.25 4858.14 63.52 4965.33 130.10 2.603 47 46.58 4836.49 136.73 4858.27 63.10 4965.54 130.10 2.604 48 49.21 4836.50 136.73 4858.27 64.82 4960.52 125.00 2.604 49 45.00 4836.48 139.36 4857.62 66.98 4959.53 125.00 2.604 50 47.63 4836.49 137.78 4858.01 65.75 4960.17 125.00 2.604 51 46.05 4836.48 138.83 4857.75 66.62 4959.78 125.00 2.605 52 45.00 4836.48 137.78 4858.01 64.02 4965.18 130.10 2.606 53 47.63 4836.49 136.20 4858.40 62.66 4965.72 130.10 2.606 54 48.68 4836.49 137.25 4858.14 65.34 4960.38 125.00 2.607 55 47.11 4836.49 138.31 4857.88 66.24 4960.02 125.00 2.607 56 46.05 4836.48 137.25 4858.14 63.61 4965.40 130.10 2.607 57 49.74 4836.50 136.73 4858.27 64.90 4960.58 125.00 2.609 58 47.11 4836.49 136.73 4858.27 63.18 4965.59 130.10 2.609 59 49.21 4836.50 137.25 4858.14 65.42 4960.44 125.00 2.610 60 46.58 4836.49 137.25 4858.14 63.70 4965.46 130.10 2.610 61 45.53 4836.48 139.36 4857.62 67.09 4959.61 125.00 2.610 62 48.16 4836.49 137.78 4858.01 65.84 4960.24 125.00 2.610 63 48.16 4836.49 136.20 4858.40 62.74 4965.78 130.10 2.610 64 46.58 4836.49 138.83 4857.75 66.72 4959.85 125.00 2.611 65 45.53 4836.48 137.78 4858.01 64.12 4965.25 130.10 2.611 66 50.26 4836.59 136.20 4858.40 64.48 4960.78 125.00 2.611 67 45.00 4836.48 136.20 4858.40 60.97 4970.74 135.20 2.612 68 47.63 4836.49 138.31 4857.88 66.34 4960.08 125.00 2.613 69 45.00 4836.48 139.88 4857.49 67.54 4959.43 125.00 2.613 70 45.00 4836.48 138.31 4857.88 64.61 4965.10 130.10 2.613 71 45.53 4836.48 136.20 4858.40 61.05 4970.79 135.20 2.614 72 48.68 4836.49 136.20 4858.40 62.81 4965.83 130.10 2.614 73 47.63 4836.49 136.73 4858.27 63.27 4965.65 130.10 2.614 74 47.11 4836.49 137.25 4858.14 63.79 4965.52 130.10 2.614 75 48.68 4836.49 137.78 4858.01 65.93 4960.30 125.00 2.615 76 46.05 4836.48 139.36 4857.62 67.19 4959.68 125.00 2.616 77 46.05 4836.48 137.78 4858.01 64.21 4965.31 130.10 2.616 78 49.74 4836.50 137.25 4858.14 65.51 4960.50 125.00 2.616 79 45.00 4836.48 136.73 4858.27 61.58 4970.66 135.20 2.616 80 46.05 4836.48 136.20 4858.40 61.13 4970.85 135.20 2.617 81 49.21 4836.50 136.20 4858.40 62.89 4965.88 130.10 2.617 82 47.11 4836.49 138.83 4857.75 66.82 4959.92 125.00 2.618 83 48.16 4836.49 136.73 4858.27 63.35 4965.71 130.10 2.618 84 48.16 4836.49 138.31 4857.88 66.43 4960.15 125.00 2.619 85 45.53 4836.48 138.31 4857.88 64.71 4965.16 130.10 2.619 86 49.21 4836.50 137.78 4858.01 66.02 4960.36 125.00 2.620 87 45.53 4836.48 139.88 4857.49 67.65 4959.51 125.00 2.620 88 46.58 4836.49 136.20 4858.40 61.20 4970.90 135.20 2.620 89 47.63 4836.49 137.25 4858.14 63.88 4965.57 130.10 2.620 90 50.26 4836.59 136.73 4858.27 65.09 4960.71 125.00 2.620 91 46.58 4836.49 137.78 4858.01 64.30 4965.38 130.10 2.620 92 49.74 4836.50 136.20 4858.40 62.96 4965.93 130.10 2.621 93 45.53 4836.48 136.73 4858.27 61.66 4970.72 135.20 2.621 94 46.58 4836.49 139.36 4857.62 67.30 4959.76 125.00 2.621 95 47.63 4836.49 138.83 4857.75 66.92 4959.99 125.00 2.622 96 48.68 4836.49 136.73 4858.27 63.43 4965.76 130.10 2.622 97 45.00 4836.48 137.25 4858.14 62.18 4970.59 135.20 2.623 98 47.11 4836.49 136.20 4858.40 61.28 4970.95 135.20 2.624 99 48.68 4836.49 138.31 4857.88 66.52 4960.21 125.00 2.624 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4836.48 XR: 136.20 YR: 4858.40 Centre: XC: 63.52 YC: 4960.10 Radius: R: 125.00 Generated failure surface: (20 points) 45.00 4836.48 50.02 4835.83 55.06 4835.39 60.11 4835.15 65.17 4835.11 70.23 4835.28 75.28 4835.65 80.30 4836.23 85.30 4837.01 90.27 4838.00 95.19 4839.18 100.06 4840.56 104.86 4842.13 109.61 4843.90 114.27 4845.87 118.85 4848.01 123.34 4850.34 127.74 4852.85 132.02 4855.54 136.20 4858.40 Slice Geometry and Properties - Critical Failure Surface (circle 1, 41 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.42 -7.4 2.50 2.52 1 50.00 25.0 47.87 2922.85 1171.05 1.03 2 47.50 1.25 -7.4 2.50 2.52 1 50.00 25.0 143.61 2973.55 1209.12 1.03 3 50.00 3.03 -5.1 2.53 2.54 1 50.00 25.0 364.72 3039.01 1268.94 1.02 4 52.53 5.73 -5.0 2.53 2.54 1 50.00 25.0 706.43 3074.27 1352.52 1.02 5 55.06 8.29 -2.7 2.53 2.53 1 50.00 25.0 1032.13 3090.19 1427.77 1.01 6 57.59 10.72 -2.7 2.53 2.53 1 50.00 25.0 1343.45 3109.15 1498.91 1.01 7 60.11 13.04 -0.4 2.53 2.53 1 50.00 25.0 1641.65 3120.02 1560.89 1.00 8 62.64 15.22 -0.4 2.53 2.53 1 50.00 25.0 1923.78 3122.88 1619.87 1.00 9 65.17 17.26 1.9 2.53 2.53 1 50.00 25.0 2189.66 3117.55 1668.85 0.99 10 67.70 19.18 1.9 2.53 2.53 1 50.00 25.0 2441.64 3104.24 1715.57 0.99 11 70.23 20.92 4.2 2.52 2.53 1 50.00 25.0 2672.42 3082.69 1751.62 0.99 12 72.75 22.57 4.2 2.52 2.53 1 50.00 25.0 2893.75 3053.24 1786.22 0.99 13 75.28 23.99 6.6 2.51 2.53 1 50.00 25.0 3087.67 3015.67 1809.46 0.99 14 77.79 25.37 6.5 2.51 2.53 1 50.00 25.0 3277.53 2970.05 1831.89 0.99 15 80.30 29.80 8.9 2.81 2.84 1 50.00 25.0 3865.18 3270.14 1843.05 0.98 16 83.11 24.26 8.9 2.19 2.22 2 10.00 35.0 3153.44 2501.15 1843.36 0.97 17 85.30 28.35 11.2 2.48 2.53 2 10.00 35.0 3685.80 2785.23 1832.64 0.97 18 87.79 29.19 11.2 2.48 2.53 2 10.00 35.0 3794.34 2707.67 1823.56 0.97 19 90.27 29.62 13.5 2.46 2.53 2 10.00 35.0 3851.05 2622.24 1799.33 0.96 20 92.73 30.19 13.5 2.46 2.53 2 10.00 35.0 3924.30 2528.89 1776.96 0.96 21 95.19 26.82 15.8 2.16 2.24 2 10.00 35.0 3486.03 2155.69 1741.24 0.96 22 97.34 27.05 15.8 2.16 2.24 2 10.00 35.0 3516.14 2070.20 1709.84 0.96 23 99.50 7.02 15.8 0.56 0.58 2 10.00 35.0 911.72 520.47 1688.85 0.96 24 100.06 30.37 18.1 2.40 2.53 2 10.00 35.0 3927.58 2201.99 1644.85 0.97 25 102.46 30.41 18.2 2.40 2.53 2 10.00 35.0 3902.66 2077.62 1585.36 0.97 26 104.86 29.88 20.5 2.37 2.53 2 10.00 35.0 3796.64 1945.56 1523.22 0.97 27 107.23 29.65 20.5 2.37 2.53 2 10.00 35.0 3711.22 1805.66 1485.44 0.97 28 109.61 27.15 22.8 2.19 2.38 2 10.00 35.0 3345.77 1564.93 1433.42 0.97 29 111.80 29.03 22.8 2.47 2.68 2 10.00 35.0 3540.96 1597.34 1345.65 0.97 30 114.27 24.24 25.1 2.26 2.50 2 10.00 35.0 2937.68 1327.32 1208.27 0.98 31 116.54 21.84 25.1 2.26 2.50 2 10.00 35.0 2625.12 1161.63 1078.43 0.98 32 118.80 19.76 27.4 2.27 2.56 2 10.00 35.0 2342.76 1009.59 950.51 0.99 33 121.07 17.88 27.4 2.27 2.56 2 10.00 35.0 2074.39 821.79 837.74 0.99 34 123.34 13.61 29.7 1.93 2.22 2 10.00 35.0 1537.60 555.05 721.38 1.00 35 125.27 12.06 29.8 1.93 2.22 2 10.00 35.0 1318.87 402.36 613.96 1.00 36 127.20 3.06 29.8 0.54 0.62 2 10.00 35.0 325.77 84.76 541.74 1.00 37 127.74 8.21 32.1 1.63 1.93 1 50.00 25.0 858.84 184.28 471.23 1.06 38 129.37 6.54 32.1 1.63 1.93 1 50.00 25.0 667.00 61.43 359.16 1.06 39 131.00 3.26 32.1 1.02 1.21 1 50.00 25.0 325.75 0.00 274.34 1.06 40 132.02 4.48 34.4 2.09 2.53 1 50.00 25.0 447.54 0.00 178.68 1.08 41 134.11 1.49 34.4 2.09 2.53 1 50.00 25.0 149.14 0.00 51.62 1.08 X-S Area: 732.23 Path Length: 96.14 X-S Weight: 91789.62 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NEl-Mining-EQ.gmf Processed: 22 Jan 2026 09:18:19 DATA: Analysis 1 - Slope Stability - Case NE-1 - Mining Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (3 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4859.00 186.20 4859.00 Profile: 2 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4853.00 186.20 4853.00 Profile: 3 (3 points) Material beneath: 1 - Clay 0.00 4836.30 50.00 4836.50 186.20 4837.20 Slope Surface (12 points) 0.00 4836.30 50.00 4836.50 111.80 4857.10 118.80 4857.10 127.20 4858.40 136.20 4858.40 144.70 4856.30 148.50 4854.00 156.70 4854.00 161.10 4856.60 164.20 4857.20 186.20 4857.40 Phreatic Surface (2 points) 0.00 4854.90 186.20 4854.90 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4836.50 XR: 141.20 YR: 4857.16 Centre: XC: 41.33 YC: 5086.35 Radius: R: 250.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NE-1 - Mining Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 1.894 Analysis Summary There were: 14333 successful analyses from a total of 20001 trial failure surfaces 5668 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.69 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4836.48 136.20 4858.40 63.52 4960.10 125.00 1.694 <-- Critical Surface 2 45.00 4836.48 137.25 4858.14 64.69 4959.92 125.00 1.695 3 45.00 4836.48 136.73 4858.27 64.11 4960.01 125.00 1.695 4 45.00 4836.48 137.78 4858.01 65.26 4959.83 125.00 1.696 5 45.53 4836.48 136.20 4858.40 63.61 4960.17 125.00 1.697 6 45.53 4836.48 136.73 4858.27 64.20 4960.08 125.00 1.698 7 45.00 4836.48 138.31 4857.88 65.84 4959.73 125.00 1.698 8 45.53 4836.48 137.25 4858.14 64.78 4959.99 125.00 1.698 9 46.05 4836.48 136.20 4858.40 63.71 4960.23 125.00 1.700 10 46.05 4836.48 136.73 4858.27 64.30 4960.15 125.00 1.700 11 45.00 4836.48 138.83 4857.75 66.41 4959.63 125.00 1.700 12 45.53 4836.48 137.78 4858.01 65.36 4959.90 125.00 1.700 13 45.53 4836.48 138.31 4857.88 65.94 4959.80 125.00 1.701 14 46.05 4836.48 137.25 4858.14 64.88 4960.06 125.00 1.702 15 45.00 4836.48 139.36 4857.62 66.98 4959.53 125.00 1.702 16 46.58 4836.49 136.20 4858.40 63.80 4960.29 125.00 1.703 17 46.05 4836.48 137.78 4858.01 65.46 4959.97 125.00 1.703 18 46.58 4836.49 136.73 4858.27 64.39 4960.21 125.00 1.703 19 45.53 4836.48 138.83 4857.75 66.52 4959.71 125.00 1.704 20 45.00 4836.48 139.88 4857.49 67.54 4959.43 125.00 1.704 21 46.05 4836.48 138.31 4857.88 66.04 4959.88 125.00 1.704 22 46.58 4836.49 137.25 4858.14 64.98 4960.12 125.00 1.705 23 45.53 4836.48 139.36 4857.62 67.09 4959.61 125.00 1.706 24 47.11 4836.49 136.73 4858.27 64.48 4960.28 125.00 1.706 25 46.58 4836.49 137.78 4858.01 65.56 4960.04 125.00 1.707 26 46.05 4836.48 138.83 4857.75 66.62 4959.78 125.00 1.707 27 47.11 4836.49 136.20 4858.40 63.88 4960.36 125.00 1.707 28 46.58 4836.49 138.31 4857.88 66.14 4959.95 125.00 1.707 29 45.00 4836.48 140.41 4857.36 68.11 4959.33 125.00 1.708 30 45.53 4836.48 139.88 4857.49 67.65 4959.51 125.00 1.708 31 47.63 4836.49 136.20 4858.40 63.97 4960.42 125.00 1.709 32 47.11 4836.49 137.25 4858.14 65.07 4960.19 125.00 1.709 33 47.63 4836.49 136.73 4858.27 64.57 4960.34 125.00 1.709 34 46.05 4836.48 139.36 4857.62 67.19 4959.68 125.00 1.709 35 45.00 4836.48 140.94 4857.23 68.67 4959.22 125.00 1.709 36 45.53 4836.48 140.41 4857.36 68.22 4959.40 125.00 1.710 37 46.58 4836.49 138.83 4857.75 66.72 4959.85 125.00 1.710 38 47.11 4836.49 137.78 4858.01 65.66 4960.10 125.00 1.710 39 45.00 4836.48 136.20 4858.40 62.24 4965.43 130.10 1.712 40 47.11 4836.49 138.31 4857.88 66.24 4960.02 125.00 1.712 41 47.63 4836.49 137.25 4858.14 65.16 4960.26 125.00 1.712 42 46.05 4836.48 139.88 4857.49 67.76 4959.58 125.00 1.712 43 48.16 4836.49 136.20 4858.40 64.05 4960.48 125.00 1.712 44 48.16 4836.49 136.73 4858.27 64.65 4960.40 125.00 1.712 45 45.00 4836.48 136.73 4858.27 62.84 4965.35 130.10 1.712 46 45.53 4836.48 140.94 4857.23 68.78 4959.30 125.00 1.713 47 46.58 4836.49 139.36 4857.62 67.30 4959.76 125.00 1.713 48 45.00 4836.48 141.46 4857.10 69.22 4959.11 125.00 1.713 49 47.63 4836.49 137.78 4858.01 65.75 4960.17 125.00 1.714 50 45.53 4836.48 136.20 4858.40 62.33 4965.49 130.10 1.714 51 45.00 4836.48 137.25 4858.14 63.43 4965.27 130.10 1.714 52 46.05 4836.48 140.41 4857.36 68.33 4959.48 125.00 1.714 53 47.11 4836.49 138.83 4857.75 66.82 4959.92 125.00 1.715 54 48.16 4836.49 137.25 4858.14 65.25 4960.32 125.00 1.715 55 45.53 4836.48 136.73 4858.27 62.93 4965.42 130.10 1.715 56 48.68 4836.49 136.20 4858.40 64.14 4960.54 125.00 1.715 57 45.00 4836.48 137.78 4858.01 64.02 4965.18 130.10 1.715 58 47.63 4836.49 138.31 4857.88 66.34 4960.08 125.00 1.715 59 46.58 4836.49 139.88 4857.49 67.87 4959.66 125.00 1.716 60 48.68 4836.49 136.73 4858.27 64.74 4960.46 125.00 1.716 61 45.00 4836.48 138.31 4857.88 64.61 4965.10 130.10 1.716 62 47.11 4836.49 139.36 4857.62 67.40 4959.83 125.00 1.716 63 46.05 4836.48 140.94 4857.23 68.89 4959.38 125.00 1.716 64 45.00 4836.48 141.99 4856.97 69.78 4959.00 125.00 1.716 65 45.53 4836.48 141.46 4857.10 69.34 4959.19 125.00 1.717 66 45.53 4836.48 137.25 4858.14 63.52 4965.33 130.10 1.717 67 48.16 4836.49 137.78 4858.01 65.84 4960.24 125.00 1.717 68 47.63 4836.49 138.83 4857.75 66.92 4959.99 125.00 1.717 69 46.05 4836.48 136.20 4858.40 62.41 4965.55 130.10 1.717 70 49.21 4836.50 136.20 4858.40 64.22 4960.59 125.00 1.718 71 46.05 4836.48 136.73 4858.27 63.01 4965.48 130.10 1.718 72 48.68 4836.49 137.25 4858.14 65.34 4960.38 125.00 1.718 73 46.58 4836.49 140.41 4857.36 68.44 4959.56 125.00 1.718 74 45.53 4836.48 137.78 4858.01 64.12 4965.25 130.10 1.719 75 48.16 4836.49 138.31 4857.88 66.43 4960.15 125.00 1.719 76 47.11 4836.49 139.88 4857.49 67.97 4959.73 125.00 1.719 77 46.05 4836.48 137.25 4858.14 63.61 4965.40 130.10 1.720 78 45.00 4836.48 142.52 4856.84 70.33 4958.89 125.00 1.720 79 47.63 4836.49 139.36 4857.62 67.50 4959.90 125.00 1.720 80 49.21 4836.50 136.73 4858.27 64.82 4960.52 125.00 1.720 81 45.53 4836.48 138.31 4857.88 64.71 4965.16 130.10 1.720 82 48.68 4836.49 137.78 4858.01 65.93 4960.30 125.00 1.720 83 45.00 4836.48 138.83 4857.75 65.19 4965.01 130.10 1.720 84 49.21 4836.50 137.25 4858.14 65.42 4960.44 125.00 1.720 85 46.58 4836.49 136.20 4858.40 62.50 4965.61 130.10 1.720 86 45.53 4836.48 141.99 4856.97 69.89 4959.08 125.00 1.720 87 46.05 4836.48 141.46 4857.10 69.45 4959.27 125.00 1.720 88 46.58 4836.49 136.73 4858.27 63.10 4965.54 130.10 1.721 89 45.00 4836.48 139.36 4857.62 65.77 4964.91 130.10 1.721 90 49.74 4836.50 136.20 4858.40 64.30 4960.65 125.00 1.721 91 46.58 4836.49 140.94 4857.23 69.00 4959.46 125.00 1.721 92 48.16 4836.49 138.83 4857.75 67.02 4960.06 125.00 1.721 93 45.53 4836.48 138.83 4857.75 65.29 4965.07 130.10 1.721 94 46.58 4836.49 137.25 4858.14 63.70 4965.46 130.10 1.721 95 46.05 4836.48 137.78 4858.01 64.21 4965.31 130.10 1.722 96 47.11 4836.49 140.41 4857.36 68.55 4959.64 125.00 1.722 97 48.68 4836.49 138.31 4857.88 66.52 4960.21 125.00 1.722 98 45.00 4836.48 143.04 4856.71 70.87 4958.77 125.00 1.723 99 49.74 4836.50 136.73 4858.27 64.90 4960.58 125.00 1.723 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4836.48 XR: 136.20 YR: 4858.40 Centre: XC: 63.52 YC: 4960.10 Radius: R: 125.00 Generated failure surface: (20 points) 45.00 4836.48 50.02 4835.83 55.06 4835.39 60.11 4835.15 65.17 4835.11 70.23 4835.28 75.28 4835.65 80.30 4836.23 85.30 4837.01 90.27 4838.00 95.19 4839.18 100.06 4840.56 104.86 4842.13 109.61 4843.90 114.27 4845.87 118.85 4848.01 123.34 4850.34 127.74 4852.85 132.02 4855.54 136.20 4858.40 Slice Geometry and Properties - Critical Failure Surface (circle 1, 41 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.42 -7.4 2.50 2.52 1 50.00 25.0 47.87 2922.85 1172.53 1.05 2 47.50 1.25 -7.4 2.50 2.52 1 50.00 25.0 143.61 2973.55 1210.82 1.05 3 50.00 3.03 -5.1 2.53 2.54 1 50.00 25.0 364.72 3039.01 1270.46 1.03 4 52.53 5.73 -5.0 2.53 2.54 1 50.00 25.0 706.43 3074.27 1354.61 1.03 5 55.06 8.29 -2.7 2.53 2.53 1 50.00 25.0 1032.13 3090.19 1429.17 1.01 6 57.59 10.72 -2.7 2.53 2.53 1 50.00 25.0 1343.45 3109.15 1500.60 1.01 7 60.11 13.04 -0.4 2.53 2.53 1 50.00 25.0 1641.65 3120.02 1561.17 1.00 8 62.64 15.22 -0.4 2.53 2.53 1 50.00 25.0 1923.78 3122.88 1620.20 1.00 9 65.17 17.26 1.9 2.53 2.53 1 50.00 25.0 2189.66 3117.55 1667.17 0.99 10 67.70 19.18 1.9 2.53 2.53 1 50.00 25.0 2441.64 3104.24 1713.73 0.99 11 70.23 20.92 4.2 2.52 2.53 1 50.00 25.0 2672.42 3082.69 1747.29 0.98 12 72.75 22.57 4.2 2.52 2.53 1 50.00 25.0 2893.75 3053.24 1781.58 0.98 13 75.28 23.99 6.6 2.51 2.53 1 50.00 25.0 3087.67 3015.67 1801.94 0.98 14 77.79 25.37 6.5 2.51 2.53 1 50.00 25.0 3277.53 2970.05 1823.96 0.98 15 80.30 29.80 8.9 2.81 2.84 1 50.00 25.0 3865.18 3270.14 1831.92 0.97 16 83.11 24.26 8.9 2.19 2.22 2 10.00 35.0 3153.44 2501.15 1828.40 0.95 17 85.30 28.35 11.2 2.48 2.53 2 10.00 35.0 3685.80 2785.23 1813.57 0.94 18 87.79 29.19 11.2 2.48 2.53 2 10.00 35.0 3794.34 2707.67 1803.95 0.94 19 90.27 29.62 13.5 2.46 2.53 2 10.00 35.0 3851.05 2622.24 1775.60 0.94 20 92.73 30.19 13.5 2.46 2.53 2 10.00 35.0 3924.30 2528.89 1752.78 0.94 21 95.19 26.82 15.8 2.16 2.24 2 10.00 35.0 3486.03 2155.69 1713.11 0.93 22 97.34 27.05 15.8 2.16 2.24 2 10.00 35.0 3516.14 2070.20 1681.46 0.93 23 99.50 7.02 15.8 0.56 0.58 2 10.00 35.0 911.72 520.47 1660.39 0.93 24 100.06 30.37 18.1 2.40 2.53 2 10.00 35.0 3927.58 2201.99 1613.04 0.93 25 102.46 30.41 18.2 2.40 2.53 2 10.00 35.0 3902.66 2077.62 1553.95 0.93 26 104.86 29.88 20.5 2.37 2.53 2 10.00 35.0 3796.64 1945.56 1488.48 0.92 27 107.23 29.65 20.5 2.37 2.53 2 10.00 35.0 3711.22 1805.66 1449.94 0.92 28 109.61 27.15 22.8 2.19 2.38 2 10.00 35.0 3345.77 1564.93 1393.89 0.92 29 111.80 29.03 22.8 2.47 2.68 2 10.00 35.0 3540.96 1597.34 1307.45 0.92 30 114.27 24.24 25.1 2.26 2.50 2 10.00 35.0 2937.68 1327.32 1170.33 0.93 31 116.54 21.84 25.1 2.26 2.50 2 10.00 35.0 2625.12 1161.63 1043.98 0.93 32 118.80 19.76 27.4 2.27 2.56 2 10.00 35.0 2342.76 1009.59 916.54 0.93 33 121.07 17.88 27.4 2.27 2.56 2 10.00 35.0 2074.39 821.79 806.04 0.93 34 123.34 13.61 29.7 1.93 2.22 2 10.00 35.0 1537.60 555.05 690.01 0.93 35 125.27 12.06 29.8 1.93 2.22 2 10.00 35.0 1318.87 402.36 585.08 0.93 36 127.20 3.06 29.8 0.54 0.62 2 10.00 35.0 325.77 84.76 514.69 0.93 37 127.74 8.21 32.1 1.63 1.93 1 50.00 25.0 858.84 184.28 447.23 1.01 38 129.37 6.54 32.1 1.63 1.93 1 50.00 25.0 667.00 61.43 337.56 1.01 39 131.00 3.26 32.1 1.02 1.21 1 50.00 25.0 325.75 0.00 255.37 1.01 40 132.02 4.48 34.4 2.09 2.53 1 50.00 25.0 447.54 0.00 163.36 1.02 41 134.11 1.49 34.4 2.09 2.53 1 50.00 25.0 149.14 0.00 43.11 1.02 X-S Area: 732.23 Path Length: 96.14 X-S Weight: 91789.62 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NE2-Mining.gmf Processed: 22 Jan 2026 09:19:03 DATA: Analysis 1 - Slope Stability - Case NE-2 - Mining Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (3 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4860.00 223.00 4860.00 Profile: 2 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4850.00 223.00 4850.00 Profile: 3 (3 points) Material beneath: 1 - Clay 0.00 4835.80 50.00 4835.80 223.00 4835.80 Slope Surface (8 points) 0.00 4835.80 50.00 4835.80 115.90 4857.80 137.40 4857.80 147.00 4858.30 173.00 4858.10 194.40 4859.10 223.00 4853.50 Phreatic Surface (2 points) 0.00 4854.90 223.00 4854.90 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4835.80 XR: 178.00 YR: 4858.33 Centre: XC: 72.14 YC: 5084.82 Radius: R: 250.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NE-2 - Mining Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 3.784 Analysis Summary There were: 19564 successful analyses from a total of 20001 trial failure surfaces 437 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 3.08 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4835.80 173.00 4858.10 90.67 4952.16 125.00 3.076 <-- Critical Surface 2 45.53 4835.80 173.00 4858.10 90.83 4952.30 125.00 3.085 3 45.00 4835.80 173.00 4858.10 89.65 4958.00 130.10 3.086 4 45.00 4835.80 173.53 4858.12 91.01 4952.02 125.00 3.091 5 46.05 4835.80 173.00 4858.10 91.00 4952.44 125.00 3.095 6 45.53 4835.80 173.00 4858.10 89.81 4958.13 130.10 3.096 7 45.53 4835.80 173.53 4858.12 91.18 4952.17 125.00 3.096 8 45.00 4835.80 173.53 4858.12 90.00 4957.87 130.10 3.097 9 45.00 4835.80 173.00 4858.10 88.65 4963.76 135.20 3.098 10 45.00 4835.80 174.05 4858.15 91.36 4951.89 125.00 3.099 11 46.05 4835.80 173.00 4858.10 89.97 4958.26 130.10 3.104 12 46.58 4835.80 173.00 4858.10 91.16 4952.58 125.00 3.104 13 46.05 4835.80 173.53 4858.12 91.34 4952.31 125.00 3.106 14 45.53 4835.80 173.53 4858.12 90.16 4958.01 130.10 3.106 15 45.00 4835.80 174.05 4858.15 90.34 4957.74 130.10 3.108 16 45.53 4835.80 173.00 4858.10 88.81 4963.89 135.20 3.108 17 45.00 4835.80 173.53 4858.12 89.00 4963.65 135.20 3.109 18 45.00 4835.80 174.58 4858.17 91.70 4951.75 125.00 3.111 19 45.53 4835.80 174.05 4858.15 91.52 4952.03 125.00 3.111 20 46.58 4835.80 173.00 4858.10 90.13 4958.40 130.10 3.113 21 45.00 4835.80 173.00 4858.10 87.66 4969.46 140.31 3.114 22 47.11 4835.80 173.00 4858.10 91.32 4952.72 125.00 3.115 23 46.05 4835.80 173.53 4858.12 90.32 4958.14 130.10 3.116 24 46.58 4835.80 173.53 4858.12 91.50 4952.45 125.00 3.116 25 45.53 4835.80 174.05 4858.15 90.50 4957.88 130.10 3.117 26 46.05 4835.80 174.05 4858.15 91.68 4952.17 125.00 3.117 27 46.05 4835.80 173.00 4858.10 88.96 4964.01 135.20 3.118 28 45.00 4835.80 174.58 4858.17 90.69 4957.62 130.10 3.118 29 45.53 4835.80 173.53 4858.12 89.15 4963.77 135.20 3.118 30 45.00 4835.80 174.05 4858.15 89.34 4963.53 135.20 3.119 31 45.53 4835.80 174.58 4858.17 91.86 4951.89 125.00 3.120 32 45.00 4835.80 175.11 4858.20 92.04 4951.61 125.00 3.122 33 45.53 4835.80 173.00 4858.10 87.81 4969.58 140.31 3.123 34 47.11 4835.80 173.00 4858.10 90.29 4958.53 130.10 3.124 35 46.58 4835.80 173.53 4858.12 90.48 4958.27 130.10 3.124 36 45.00 4835.80 173.53 4858.12 88.00 4969.35 140.31 3.124 37 47.63 4835.80 173.00 4858.10 91.48 4952.86 125.00 3.125 38 47.11 4835.80 173.53 4858.12 91.66 4952.59 125.00 3.126 39 46.58 4835.80 174.05 4858.15 91.85 4952.31 125.00 3.127 40 46.05 4835.80 174.05 4858.15 90.66 4958.01 130.10 3.127 41 46.58 4835.80 173.00 4858.10 89.12 4964.14 135.20 3.127 42 46.05 4835.80 173.53 4858.12 89.31 4963.90 135.20 3.128 43 45.53 4835.80 174.58 4858.17 90.85 4957.75 130.10 3.128 44 45.53 4835.80 174.05 4858.15 89.50 4963.65 135.20 3.128 45 45.00 4835.80 174.58 4858.17 89.69 4963.41 135.20 3.129 46 46.05 4835.80 174.58 4858.17 92.03 4952.04 125.00 3.129 47 45.00 4835.80 175.11 4858.20 91.03 4957.49 130.10 3.129 48 45.00 4835.80 173.00 4858.10 86.67 4975.11 145.41 3.132 49 45.53 4835.80 175.11 4858.20 92.21 4951.76 125.00 3.132 50 45.53 4835.80 173.53 4858.12 88.16 4969.47 140.31 3.133 51 45.00 4835.80 174.05 4858.15 88.35 4969.24 140.31 3.134 52 47.63 4835.80 173.00 4858.10 90.45 4958.66 130.10 3.134 53 45.00 4835.80 175.63 4858.22 92.39 4951.47 125.00 3.134 54 47.11 4835.80 173.53 4858.12 90.64 4958.40 130.10 3.135 55 46.58 4835.80 174.05 4858.15 90.82 4958.15 130.10 3.135 56 48.16 4835.80 173.00 4858.10 91.64 4952.99 125.00 3.136 57 45.00 4835.80 175.63 4858.22 91.37 4957.36 130.10 3.136 58 47.63 4835.80 173.53 4858.12 91.82 4952.73 125.00 3.137 59 47.11 4835.80 173.00 4858.10 89.27 4964.26 135.20 3.137 60 47.11 4835.80 174.05 4858.15 92.01 4952.46 125.00 3.137 61 46.05 4835.80 174.58 4858.17 91.01 4957.89 130.10 3.138 62 46.58 4835.80 173.53 4858.12 89.47 4964.02 135.20 3.138 63 46.05 4835.80 174.05 4858.15 89.66 4963.78 135.20 3.138 64 45.53 4835.80 175.11 4858.20 91.19 4957.62 130.10 3.138 65 45.53 4835.80 174.58 4858.17 89.85 4963.53 135.20 3.139 66 46.05 4835.80 173.00 4858.10 87.96 4969.70 140.31 3.139 67 45.00 4835.80 175.11 4858.20 90.03 4963.28 135.20 3.139 68 45.00 4835.80 173.53 4858.12 87.02 4975.00 145.41 3.140 69 45.53 4835.80 173.00 4858.10 86.82 4975.22 145.41 3.142 70 46.05 4835.80 173.53 4858.12 88.31 4969.59 140.31 3.143 71 46.58 4835.80 174.58 4858.17 92.19 4952.18 125.00 3.143 72 46.58 4835.80 173.00 4858.10 88.12 4969.82 140.31 3.143 73 45.53 4835.80 174.05 4858.15 88.51 4969.36 140.31 3.143 74 45.53 4835.80 175.63 4858.22 92.55 4951.62 125.00 3.144 75 45.00 4835.80 174.58 4858.17 88.70 4969.13 140.31 3.144 76 48.68 4835.80 173.00 4858.10 91.80 4953.13 125.00 3.145 77 48.16 4835.80 173.00 4858.10 90.60 4958.78 130.10 3.145 78 47.63 4835.80 173.53 4858.12 90.79 4958.53 130.10 3.145 79 47.11 4835.80 174.05 4858.15 90.98 4958.28 130.10 3.145 80 45.00 4835.80 176.16 4858.25 92.73 4951.33 125.00 3.146 81 46.05 4835.80 175.11 4858.20 92.37 4951.90 125.00 3.147 82 48.16 4835.80 173.53 4858.12 91.98 4952.87 125.00 3.147 83 46.58 4835.80 174.58 4858.17 91.17 4958.02 130.10 3.147 84 47.63 4835.80 173.00 4858.10 89.43 4964.38 135.20 3.148 85 47.63 4835.80 174.05 4858.15 92.17 4952.60 125.00 3.148 86 47.11 4835.80 173.53 4858.12 89.62 4964.14 135.20 3.148 87 46.58 4835.80 174.05 4858.15 89.81 4963.90 135.20 3.148 88 46.05 4835.80 174.58 4858.17 90.01 4963.66 135.20 3.148 89 45.53 4835.80 175.11 4858.20 90.19 4963.41 135.20 3.149 90 46.05 4835.80 175.11 4858.20 91.36 4957.76 130.10 3.149 91 45.00 4835.80 175.63 4858.22 90.38 4963.16 135.20 3.149 92 45.53 4835.80 173.53 4858.12 87.17 4975.12 145.41 3.150 93 45.00 4835.80 176.16 4858.25 91.72 4957.22 130.10 3.151 94 45.53 4835.80 175.63 4858.22 91.54 4957.49 130.10 3.151 95 47.11 4835.80 174.58 4858.17 92.35 4952.32 125.00 3.151 96 47.11 4835.80 173.00 4858.10 88.27 4969.93 140.31 3.152 97 46.05 4835.80 173.00 4858.10 86.97 4975.33 145.41 3.152 98 45.00 4835.80 174.05 4858.15 87.37 4974.90 145.41 3.152 99 46.58 4835.80 175.11 4858.20 92.54 4952.05 125.00 3.153 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4835.80 XR: 173.00 YR: 4858.10 Centre: XC: 90.67 YC: 4952.16 Radius: R: 125.00 Generated failure surface: (20 points) 45.00 4835.80 51.77 4833.37 58.66 4831.33 65.66 4829.69 72.74 4828.45 79.89 4827.62 87.06 4827.21 94.25 4827.21 101.43 4827.62 108.57 4828.45 115.66 4829.68 122.66 4831.32 129.55 4833.36 136.32 4835.79 142.93 4838.61 149.38 4841.80 155.62 4845.36 161.66 4849.27 167.46 4853.52 173.00 4858.10 Slice Geometry and Properties - Critical Failure Surface (circle 1, 43 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.12 -19.8 2.50 2.66 1 50.00 25.0 129.29 3241.13 1251.11 1.12 2 47.50 3.37 -19.8 2.50 2.66 1 50.00 25.0 387.73 3389.95 1357.21 1.12 3 50.00 4.26 -19.8 1.77 1.88 1 50.00 25.0 497.41 2484.30 1468.90 1.12 4 51.77 14.16 -16.5 3.45 3.60 1 50.00 25.0 1689.11 4945.17 1625.16 1.09 5 55.21 21.65 -16.5 3.45 3.59 1 50.00 25.0 2609.00 5173.79 1826.39 1.09 6 58.66 29.26 -13.2 3.50 3.60 1 50.00 25.0 3547.27 5380.39 2010.52 1.06 7 62.16 36.22 -13.2 3.50 3.59 1 50.00 25.0 4409.15 5564.12 2188.30 1.06 8 65.66 43.36 -9.9 3.54 3.60 1 50.00 25.0 5295.31 5725.76 2346.71 1.04 9 69.20 49.73 -9.9 3.54 3.60 1 50.00 25.0 6091.12 5864.19 2500.68 1.04 10 72.74 56.23 -6.6 3.57 3.59 1 50.00 25.0 6905.19 5979.77 2633.30 1.02 11 76.31 61.96 -6.6 3.57 3.60 1 50.00 25.0 7627.99 6072.43 2763.17 1.02 12 79.89 67.67 -3.3 3.59 3.59 1 50.00 25.0 8351.69 6141.92 2870.01 1.01 13 83.47 72.72 -3.3 3.59 3.59 1 50.00 25.0 8996.22 6188.37 2975.63 1.01 14 87.06 58.61 -0.0 2.74 2.74 1 50.00 25.0 7266.27 4727.51 3047.03 1.00 15 89.80 61.11 -0.0 2.74 2.74 1 50.00 25.0 7591.39 4727.61 3108.85 1.00 16 92.54 39.64 0.0 1.72 1.72 1 50.00 25.0 4925.04 2968.35 3154.80 1.00 17 94.25 85.63 3.3 3.59 3.60 1 50.00 25.0 10612.51 6188.66 3175.86 0.99 18 97.84 89.19 3.3 3.59 3.60 1 50.00 25.0 11021.80 6142.31 3214.69 0.99 19 101.43 74.18 6.6 2.89 2.91 1 50.00 25.0 9146.92 4922.78 3225.85 0.99 20 104.32 76.01 6.6 2.89 2.91 1 50.00 25.0 9356.97 4862.13 3237.75 0.99 21 107.21 36.42 6.6 1.36 1.37 1 50.00 25.0 4473.92 2268.48 3256.94 0.99 22 108.57 96.30 9.9 3.54 3.59 1 50.00 25.0 11772.95 5864.82 3277.88 0.99 23 112.12 98.30 9.9 3.54 3.60 1 50.00 25.0 11940.61 5726.61 3322.97 0.99 24 115.66 96.99 13.2 3.50 3.60 1 50.00 25.0 11747.40 5565.55 3290.43 0.99 25 119.16 94.12 13.2 3.50 3.59 1 50.00 25.0 11417.39 5381.47 3197.66 0.99 26 122.66 89.53 16.5 3.45 3.60 1 50.00 25.0 10880.28 5175.32 3077.83 1.00 27 126.11 86.02 16.5 3.45 3.60 1 50.00 25.0 10476.08 4946.61 2962.88 1.00 28 129.55 80.63 19.8 3.38 3.59 1 50.00 25.0 9845.75 4695.77 2821.89 1.01 29 132.94 76.51 19.8 3.38 3.60 1 50.00 25.0 9372.59 4423.14 2685.29 1.01 30 136.32 23.53 23.1 1.08 1.17 2 10.00 35.0 2885.76 1383.41 2537.62 0.99 31 137.40 58.20 23.1 2.77 3.01 2 10.00 35.0 7115.98 3389.61 2442.52 0.99 32 140.17 55.34 23.1 2.77 3.01 2 10.00 35.0 6731.80 3168.38 2309.46 0.99 33 142.93 75.53 26.4 4.07 4.54 2 10.00 35.0 9118.11 4327.52 2110.69 1.00 34 147.00 40.59 26.4 2.38 2.65 2 10.00 35.0 4860.35 2265.55 1922.79 1.00 35 149.38 48.67 29.7 3.12 3.59 2 10.00 35.0 5781.56 2738.87 1724.13 1.02 36 152.50 43.04 29.7 3.12 3.59 2 10.00 35.0 5051.48 2339.73 1504.50 1.02 37 155.62 35.85 33.0 3.02 3.59 2 10.00 35.0 4138.40 1920.88 1262.37 1.04 38 158.64 29.88 33.0 3.02 3.60 2 10.00 35.0 3364.46 1482.31 1023.09 1.04 39 161.66 8.50 36.3 0.99 1.23 2 10.00 35.0 934.47 405.28 849.87 1.06 40 162.65 17.51 36.2 2.40 2.98 1 50.00 25.0 1895.62 746.92 724.71 1.12 41 165.05 13.23 36.3 2.40 2.98 1 50.00 25.0 1404.74 419.69 529.75 1.12 42 167.46 6.55 39.5 1.67 2.16 1 50.00 25.0 672.23 93.03 350.90 1.15 43 169.12 6.26 39.5 3.88 5.03 1 50.00 25.0 625.77 0.00 131.58 1.15 X-S Area: 2163.60 Path Length: 136.61 X-S Weight: 262965.16 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NE2-Mining-EQ.gmf Processed: 22 Jan 2026 09:19:37 DATA: Analysis 1 - Slope Stability - Case NE-2 - Mining Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (3 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4860.00 223.00 4860.00 Profile: 2 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4850.00 223.00 4850.00 Profile: 3 (3 points) Material beneath: 1 - Clay 0.00 4835.80 50.00 4835.80 223.00 4835.80 Slope Surface (8 points) 0.00 4835.80 50.00 4835.80 115.90 4857.80 137.40 4857.80 147.00 4858.30 173.00 4858.10 194.40 4859.10 223.00 4853.50 Phreatic Surface (2 points) 0.00 4854.90 223.00 4854.90 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4835.80 XR: 178.00 YR: 4858.33 Centre: XC: 72.14 YC: 5084.82 Radius: R: 250.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NE-2 - Mining Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.174 Analysis Summary There were: 19564 successful analyses from a total of 20001 trial failure surfaces 437 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.81 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4835.80 173.00 4858.10 90.67 4952.16 125.00 1.813 <-- Critical Surface 2 45.53 4835.80 173.00 4858.10 90.83 4952.30 125.00 1.816 3 45.00 4835.80 173.00 4858.10 89.65 4958.00 130.10 1.817 4 45.00 4835.80 173.53 4858.12 91.01 4952.02 125.00 1.818 5 45.00 4835.80 174.05 4858.15 91.36 4951.89 125.00 1.820 6 45.53 4835.80 173.53 4858.12 91.18 4952.17 125.00 1.820 7 45.00 4835.80 173.53 4858.12 90.00 4957.87 130.10 1.820 8 46.05 4835.80 173.00 4858.10 91.00 4952.44 125.00 1.821 9 45.53 4835.80 173.00 4858.10 89.81 4958.13 130.10 1.821 10 45.00 4835.80 173.00 4858.10 88.65 4963.76 135.20 1.822 11 45.00 4835.80 174.05 4858.15 90.34 4957.74 130.10 1.823 12 45.00 4835.80 174.58 4858.17 91.70 4951.75 125.00 1.824 13 45.53 4835.80 173.53 4858.12 90.16 4958.01 130.10 1.824 14 46.05 4835.80 173.53 4858.12 91.34 4952.31 125.00 1.824 15 46.05 4835.80 173.00 4858.10 89.97 4958.26 130.10 1.824 16 46.58 4835.80 173.00 4858.10 91.16 4952.58 125.00 1.825 17 45.00 4835.80 173.53 4858.12 89.00 4963.65 135.20 1.825 18 45.53 4835.80 174.05 4858.15 91.52 4952.03 125.00 1.825 19 45.00 4835.80 174.58 4858.17 90.69 4957.62 130.10 1.826 20 45.53 4835.80 173.00 4858.10 88.81 4963.89 135.20 1.827 21 45.53 4835.80 174.05 4858.15 90.50 4957.88 130.10 1.827 22 45.00 4835.80 175.11 4858.20 92.04 4951.61 125.00 1.827 23 45.53 4835.80 174.58 4858.17 91.86 4951.89 125.00 1.828 24 46.05 4835.80 174.05 4858.15 91.68 4952.17 125.00 1.828 25 45.00 4835.80 174.05 4858.15 89.34 4963.53 135.20 1.828 26 46.05 4835.80 173.53 4858.12 90.32 4958.14 130.10 1.828 27 46.58 4835.80 173.53 4858.12 91.50 4952.45 125.00 1.829 28 46.58 4835.80 173.00 4858.10 90.13 4958.40 130.10 1.829 29 45.00 4835.80 175.11 4858.20 91.03 4957.49 130.10 1.829 30 45.53 4835.80 173.53 4858.12 89.15 4963.77 135.20 1.830 31 47.11 4835.80 173.00 4858.10 91.32 4952.72 125.00 1.830 32 45.00 4835.80 173.00 4858.10 87.66 4969.46 140.31 1.830 33 45.00 4835.80 175.63 4858.22 91.37 4957.36 130.10 1.831 34 45.53 4835.80 174.58 4858.17 90.85 4957.75 130.10 1.831 35 45.00 4835.80 174.58 4858.17 89.69 4963.41 135.20 1.831 36 46.05 4835.80 173.00 4858.10 88.96 4964.01 135.20 1.831 37 45.00 4835.80 175.63 4858.22 92.39 4951.47 125.00 1.831 38 45.53 4835.80 175.11 4858.20 92.21 4951.76 125.00 1.831 39 46.05 4835.80 174.58 4858.17 92.03 4952.04 125.00 1.831 40 46.05 4835.80 174.05 4858.15 90.66 4958.01 130.10 1.832 41 46.58 4835.80 174.05 4858.15 91.85 4952.31 125.00 1.832 42 46.58 4835.80 173.53 4858.12 90.48 4958.27 130.10 1.832 43 45.53 4835.80 174.05 4858.15 89.50 4963.65 135.20 1.832 44 45.00 4835.80 173.53 4858.12 88.00 4969.35 140.31 1.833 45 47.11 4835.80 173.53 4858.12 91.66 4952.59 125.00 1.833 46 47.11 4835.80 173.00 4858.10 90.29 4958.53 130.10 1.833 47 45.53 4835.80 175.11 4858.20 91.19 4957.62 130.10 1.834 48 45.00 4835.80 175.11 4858.20 90.03 4963.28 135.20 1.834 49 46.05 4835.80 173.53 4858.12 89.31 4963.90 135.20 1.834 50 47.63 4835.80 173.00 4858.10 91.48 4952.86 125.00 1.834 51 45.53 4835.80 173.00 4858.10 87.81 4969.58 140.31 1.834 52 46.05 4835.80 174.58 4858.17 91.01 4957.89 130.10 1.835 53 46.58 4835.80 174.05 4858.15 90.82 4958.15 130.10 1.835 54 45.00 4835.80 176.16 4858.25 92.73 4951.33 125.00 1.835 55 45.53 4835.80 175.63 4858.22 92.55 4951.62 125.00 1.835 56 45.53 4835.80 174.58 4858.17 89.85 4963.53 135.20 1.835 57 46.58 4835.80 173.00 4858.10 89.12 4964.14 135.20 1.836 58 45.00 4835.80 174.05 4858.15 88.35 4969.24 140.31 1.836 59 45.00 4835.80 176.16 4858.25 91.72 4957.22 130.10 1.836 60 45.00 4835.80 175.63 4858.22 90.38 4963.16 135.20 1.837 61 47.11 4835.80 174.05 4858.15 92.01 4952.46 125.00 1.837 62 47.11 4835.80 173.53 4858.12 90.64 4958.40 130.10 1.837 63 46.05 4835.80 174.05 4858.15 89.66 4963.78 135.20 1.837 64 45.53 4835.80 173.53 4858.12 88.16 4969.47 140.31 1.837 65 45.53 4835.80 175.63 4858.22 91.54 4957.49 130.10 1.838 66 47.63 4835.80 173.53 4858.12 91.82 4952.73 125.00 1.838 67 46.58 4835.80 174.58 4858.17 92.19 4952.18 125.00 1.838 68 46.05 4835.80 175.11 4858.20 91.36 4957.76 130.10 1.838 69 45.53 4835.80 175.11 4858.20 90.19 4963.41 135.20 1.838 70 47.63 4835.80 173.00 4858.10 90.45 4958.66 130.10 1.838 71 45.00 4835.80 174.58 4858.17 88.70 4969.13 140.31 1.838 72 46.58 4835.80 173.53 4858.12 89.47 4964.02 135.20 1.838 73 46.05 4835.80 175.11 4858.20 92.37 4951.90 125.00 1.839 74 48.16 4835.80 173.00 4858.10 91.64 4952.99 125.00 1.839 75 45.00 4835.80 176.68 4858.27 93.07 4951.19 125.00 1.839 76 45.53 4835.80 176.16 4858.25 92.89 4951.48 125.00 1.839 77 46.05 4835.80 175.63 4858.22 92.71 4951.76 125.00 1.839 78 46.58 4835.80 174.58 4858.17 91.17 4958.02 130.10 1.839 79 45.00 4835.80 173.00 4858.10 86.67 4975.11 145.41 1.839 80 46.05 4835.80 174.58 4858.17 90.01 4963.66 135.20 1.840 81 47.11 4835.80 174.05 4858.15 90.98 4958.28 130.10 1.840 82 45.53 4835.80 174.05 4858.15 88.51 4969.36 140.31 1.840 83 45.53 4835.80 176.16 4858.25 91.88 4957.36 130.10 1.840 84 47.11 4835.80 173.00 4858.10 89.27 4964.26 135.20 1.840 85 46.58 4835.80 175.11 4858.20 92.54 4952.05 125.00 1.841 86 45.00 4835.80 176.16 4858.25 90.72 4963.04 135.20 1.841 87 45.00 4835.80 175.11 4858.20 89.05 4969.01 140.31 1.841 88 47.63 4835.80 174.05 4858.15 92.17 4952.60 125.00 1.841 89 45.53 4835.80 175.63 4858.22 90.54 4963.29 135.20 1.841 90 45.00 4835.80 176.68 4858.27 92.06 4957.09 130.10 1.841 91 47.11 4835.80 174.58 4858.17 92.35 4952.32 125.00 1.841 92 47.63 4835.80 173.53 4858.12 90.79 4958.53 130.10 1.841 93 45.00 4835.80 173.53 4858.12 87.02 4975.00 145.41 1.841 94 46.05 4835.80 175.63 4858.22 91.70 4957.63 130.10 1.841 95 46.05 4835.80 173.53 4858.12 88.31 4969.59 140.31 1.841 96 46.58 4835.80 174.05 4858.15 89.81 4963.90 135.20 1.841 97 46.05 4835.80 173.00 4858.10 87.96 4969.70 140.31 1.842 98 48.16 4835.80 173.53 4858.12 91.98 4952.87 125.00 1.842 99 46.05 4835.80 175.11 4858.20 90.35 4963.54 135.20 1.843 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4835.80 XR: 173.00 YR: 4858.10 Centre: XC: 90.67 YC: 4952.16 Radius: R: 125.00 Generated failure surface: (20 points) 45.00 4835.80 51.77 4833.37 58.66 4831.33 65.66 4829.69 72.74 4828.45 79.89 4827.62 87.06 4827.21 94.25 4827.21 101.43 4827.62 108.57 4828.45 115.66 4829.68 122.66 4831.32 129.55 4833.36 136.32 4835.79 142.93 4838.61 149.38 4841.80 155.62 4845.36 161.66 4849.27 167.46 4853.52 173.00 4858.10 Slice Geometry and Properties - Critical Failure Surface (circle 1, 43 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.12 -19.8 2.50 2.66 1 50.00 25.0 129.29 3241.13 1256.91 1.17 2 47.50 3.37 -19.8 2.50 2.66 1 50.00 25.0 387.73 3389.95 1365.10 1.17 3 50.00 4.26 -19.8 1.77 1.88 1 50.00 25.0 497.41 2484.30 1479.47 1.17 4 51.77 14.16 -16.5 3.45 3.60 1 50.00 25.0 1689.11 4945.17 1637.24 1.13 5 55.21 21.65 -16.5 3.45 3.59 1 50.00 25.0 2609.00 5173.79 1843.13 1.13 6 58.66 29.26 -13.2 3.50 3.60 1 50.00 25.0 3547.27 5380.39 2026.89 1.09 7 62.16 36.22 -13.2 3.50 3.59 1 50.00 25.0 4409.15 5564.12 2208.00 1.09 8 65.66 43.36 -9.9 3.54 3.60 1 50.00 25.0 5295.31 5725.76 2363.34 1.06 9 69.20 49.73 -9.9 3.54 3.60 1 50.00 25.0 6091.12 5864.19 2519.53 1.06 10 72.74 56.23 -6.6 3.57 3.59 1 50.00 25.0 6905.19 5979.77 2646.85 1.04 11 76.31 61.96 -6.6 3.57 3.60 1 50.00 25.0 7627.99 6072.43 2778.05 1.04 12 79.89 67.67 -3.3 3.59 3.59 1 50.00 25.0 8351.69 6141.92 2877.86 1.02 13 83.47 72.72 -3.3 3.59 3.59 1 50.00 25.0 8996.22 6188.37 2984.05 1.02 14 87.06 58.61 -0.0 2.74 2.74 1 50.00 25.0 7266.27 4727.51 3047.06 1.00 15 89.80 61.11 -0.0 2.74 2.74 1 50.00 25.0 7591.39 4727.61 3108.87 1.00 16 92.54 39.64 0.0 1.72 1.72 1 50.00 25.0 4925.04 2968.35 3154.80 1.00 17 94.25 85.63 3.3 3.59 3.60 1 50.00 25.0 10612.51 6188.66 3166.50 0.99 18 97.84 89.19 3.3 3.59 3.60 1 50.00 25.0 11021.80 6142.31 3205.02 0.99 19 101.43 74.18 6.6 2.89 2.91 1 50.00 25.0 9146.92 4922.78 3206.39 0.98 20 104.32 76.01 6.6 2.89 2.91 1 50.00 25.0 9356.97 4862.13 3217.92 0.98 21 107.21 36.42 6.6 1.36 1.37 1 50.00 25.0 4473.92 2268.48 3236.69 0.98 22 108.57 96.30 9.9 3.54 3.59 1 50.00 25.0 11772.95 5864.82 3246.99 0.97 23 112.12 98.30 9.9 3.54 3.60 1 50.00 25.0 11940.61 5726.61 3290.59 0.97 24 115.66 96.99 13.2 3.50 3.60 1 50.00 25.0 11747.40 5565.55 3247.25 0.97 25 119.16 94.12 13.2 3.50 3.59 1 50.00 25.0 11417.39 5381.47 3155.48 0.97 26 122.66 89.53 16.5 3.45 3.60 1 50.00 25.0 10880.28 5175.32 3027.13 0.97 27 126.11 86.02 16.5 3.45 3.60 1 50.00 25.0 10476.08 4946.61 2913.68 0.97 28 129.55 80.63 19.8 3.38 3.59 1 50.00 25.0 9845.75 4695.77 2765.47 0.97 29 132.94 76.51 19.8 3.38 3.60 1 50.00 25.0 9372.59 4423.14 2630.96 0.97 30 136.32 23.53 23.1 1.08 1.17 2 10.00 35.0 2885.76 1383.41 2457.92 0.93 31 137.40 58.20 23.1 2.77 3.01 2 10.00 35.0 7115.98 3389.61 2365.33 0.93 32 140.17 55.34 23.1 2.77 3.01 2 10.00 35.0 6731.80 3168.38 2235.73 0.93 33 142.93 75.53 26.4 4.07 4.54 2 10.00 35.0 9118.11 4327.52 2033.37 0.94 34 147.00 40.59 26.4 2.38 2.65 2 10.00 35.0 4860.35 2265.55 1851.31 0.94 35 149.38 48.67 29.7 3.12 3.59 2 10.00 35.0 5781.56 2738.87 1651.80 0.94 36 152.50 43.04 29.7 3.12 3.59 2 10.00 35.0 5051.48 2339.73 1440.21 0.94 37 155.62 35.85 33.0 3.02 3.59 2 10.00 35.0 4138.40 1920.88 1201.30 0.95 38 158.64 29.88 33.0 3.02 3.60 2 10.00 35.0 3364.46 1482.31 971.65 0.95 39 161.66 8.50 36.3 0.99 1.23 2 10.00 35.0 934.47 405.28 801.30 0.97 40 162.65 17.51 36.2 2.40 2.98 1 50.00 25.0 1895.62 746.92 686.83 1.04 41 165.05 13.23 36.3 2.40 2.98 1 50.00 25.0 1404.74 419.69 497.41 1.04 42 167.46 6.55 39.5 1.67 2.16 1 50.00 25.0 672.23 93.03 321.02 1.07 43 169.12 6.26 39.5 3.88 5.03 1 50.00 25.0 625.77 0.00 114.39 1.07 X-S Area: 2163.60 Path Length: 136.61 X-S Weight: 262965.16 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NE3-Mining.gmf Processed: 22 Jan 2026 09:20:05 DATA: Analysis 1 - Slope Stability - Case NE-3 - Mining Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (3 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4860.00 197.80 4860.00 Profile: 2 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4855.00 197.80 4855.00 Profile: 3 (3 points) Material beneath: 1 - Clay 0.00 4835.00 50.00 4835.80 197.80 4835.80 Slope Surface (10 points) 0.00 4835.80 50.00 4835.80 119.00 4858.80 132.60 4859.30 139.10 4855.70 146.80 4859.70 147.80 4859.70 161.00 4859.60 189.40 4859.50 197.80 4859.30 Phreatic Surface (2 points) 0.00 4854.90 223.00 4854.90 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4835.80 XR: 152.80 YR: 4859.66 Centre: XC: 46.15 YC: 5085.77 Radius: R: 250.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NE-3 - Mining Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.974 Analysis Summary There were: 13995 successful analyses from a total of 20001 trial failure surfaces 6006 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.60 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4835.80 148.33 4859.70 71.16 4958.03 125.00 2.598 <-- Critical Surface 2 45.00 4835.80 148.85 4859.69 71.57 4957.94 125.00 2.599 3 45.00 4835.80 147.80 4859.70 70.74 4958.12 125.00 2.599 4 45.00 4835.80 149.38 4859.69 71.99 4957.85 125.00 2.600 5 45.00 4835.80 149.91 4859.68 72.40 4957.76 125.00 2.602 6 45.53 4835.80 147.80 4859.70 70.85 4958.21 125.00 2.603 7 45.00 4835.80 150.43 4859.68 72.82 4957.67 125.00 2.604 8 45.53 4835.80 148.85 4859.69 71.69 4958.03 125.00 2.605 9 45.53 4835.80 148.33 4859.70 71.27 4958.12 125.00 2.606 10 45.00 4835.80 150.96 4859.68 73.23 4957.57 125.00 2.606 11 45.53 4835.80 149.38 4859.69 72.10 4957.94 125.00 2.606 12 45.53 4835.80 149.91 4859.68 72.52 4957.85 125.00 2.608 13 45.00 4835.80 151.48 4859.67 73.64 4957.47 125.00 2.609 14 46.05 4835.80 148.33 4859.70 71.38 4958.21 125.00 2.610 15 46.05 4835.80 147.80 4859.70 70.96 4958.29 125.00 2.610 16 45.53 4835.80 150.43 4859.68 72.93 4957.76 125.00 2.610 17 45.00 4835.80 152.01 4859.67 74.05 4957.38 125.00 2.611 18 46.05 4835.80 149.38 4859.69 72.22 4958.03 125.00 2.612 19 46.05 4835.80 148.85 4859.69 71.80 4958.12 125.00 2.613 20 45.53 4835.80 150.96 4859.68 73.35 4957.66 125.00 2.613 21 45.00 4835.80 152.54 4859.66 74.46 4957.28 125.00 2.614 22 46.05 4835.80 149.91 4859.68 72.64 4957.94 125.00 2.614 23 45.53 4835.80 151.48 4859.67 73.76 4957.57 125.00 2.615 24 45.00 4835.80 153.06 4859.66 74.87 4957.18 125.00 2.617 25 46.05 4835.80 150.43 4859.68 73.05 4957.85 125.00 2.617 26 46.58 4835.80 148.85 4859.69 71.91 4958.21 125.00 2.617 27 46.58 4835.80 148.33 4859.70 71.49 4958.29 125.00 2.617 28 46.58 4835.80 147.80 4859.70 71.07 4958.38 125.00 2.617 29 45.53 4835.80 152.01 4859.67 74.17 4957.47 125.00 2.618 30 46.05 4835.80 150.96 4859.68 73.46 4957.76 125.00 2.619 31 46.58 4835.80 149.91 4859.68 72.75 4958.03 125.00 2.621 32 46.58 4835.80 149.38 4859.69 72.33 4958.12 125.00 2.621 33 45.53 4835.80 152.54 4859.66 74.58 4957.38 125.00 2.621 34 45.00 4835.80 153.59 4859.66 75.27 4957.08 125.00 2.622 35 46.05 4835.80 151.48 4859.67 73.88 4957.66 125.00 2.622 36 46.58 4835.80 150.43 4859.68 73.17 4957.94 125.00 2.623 37 45.53 4835.80 153.06 4859.66 74.99 4957.28 125.00 2.624 38 47.11 4835.80 147.80 4859.70 71.17 4958.46 125.00 2.624 39 47.11 4835.80 148.33 4859.70 71.60 4958.38 125.00 2.624 40 47.11 4835.80 148.85 4859.69 72.02 4958.29 125.00 2.625 41 47.11 4835.80 149.38 4859.69 72.44 4958.21 125.00 2.625 42 46.05 4835.80 152.01 4859.67 74.29 4957.57 125.00 2.625 43 45.00 4835.80 154.12 4859.65 75.68 4956.98 125.00 2.626 44 46.58 4835.80 150.96 4859.68 73.58 4957.85 125.00 2.626 45 45.00 4835.80 148.85 4859.69 70.32 4963.42 130.10 2.627 46 45.00 4835.80 148.33 4859.70 69.89 4963.50 130.10 2.627 47 45.00 4835.80 147.80 4859.70 69.47 4963.58 130.10 2.627 48 45.53 4835.80 153.59 4859.66 75.40 4957.18 125.00 2.628 49 45.00 4835.80 149.38 4859.69 70.74 4963.33 130.10 2.628 50 46.05 4835.80 152.54 4859.66 74.70 4957.47 125.00 2.628 51 46.58 4835.80 151.48 4859.67 74.00 4957.76 125.00 2.629 52 47.11 4835.80 150.43 4859.68 73.28 4958.03 125.00 2.629 53 47.11 4835.80 149.91 4859.68 72.86 4958.12 125.00 2.629 54 45.00 4835.80 154.64 4859.65 76.08 4956.87 125.00 2.630 55 45.00 4835.80 149.91 4859.68 71.16 4963.25 130.10 2.630 56 47.63 4835.80 147.80 4859.70 71.28 4958.54 125.00 2.631 57 47.63 4835.80 148.33 4859.70 71.71 4958.46 125.00 2.631 58 45.00 4835.80 150.43 4859.68 71.57 4963.16 130.10 2.632 59 46.05 4835.80 153.06 4859.66 75.11 4957.38 125.00 2.632 60 47.63 4835.80 148.85 4859.69 72.13 4958.38 125.00 2.632 61 45.53 4835.80 154.12 4859.65 75.80 4957.08 125.00 2.632 62 46.58 4835.80 152.01 4859.67 74.41 4957.66 125.00 2.632 63 47.11 4835.80 150.96 4859.68 73.70 4957.94 125.00 2.632 64 47.63 4835.80 149.38 4859.69 72.55 4958.29 125.00 2.633 65 47.63 4835.80 149.91 4859.68 72.97 4958.20 125.00 2.634 66 45.00 4835.80 150.96 4859.68 71.99 4963.07 130.10 2.634 67 45.53 4835.80 147.80 4859.70 69.58 4963.66 130.10 2.634 68 45.00 4835.80 155.17 4859.64 76.48 4956.77 125.00 2.634 69 45.53 4835.80 148.33 4859.70 70.00 4963.58 130.10 2.634 70 45.53 4835.80 148.85 4859.69 70.42 4963.50 130.10 2.634 71 45.53 4835.80 149.38 4859.69 70.85 4963.41 130.10 2.635 72 46.58 4835.80 152.54 4859.66 74.82 4957.57 125.00 2.635 73 47.11 4835.80 151.48 4859.67 74.11 4957.85 125.00 2.636 74 46.05 4835.80 153.59 4859.66 75.52 4957.28 125.00 2.636 75 45.53 4835.80 149.91 4859.68 71.27 4963.33 130.10 2.636 76 45.53 4835.80 154.64 4859.65 76.21 4956.98 125.00 2.636 77 45.00 4835.80 151.48 4859.67 72.41 4962.98 130.10 2.637 78 48.16 4835.80 147.80 4859.70 71.38 4958.62 125.00 2.638 79 48.16 4835.80 148.33 4859.70 71.81 4958.54 125.00 2.638 80 46.05 4835.80 154.12 4859.65 75.93 4957.18 125.00 2.638 81 45.00 4835.80 155.69 4859.64 76.88 4956.67 125.00 2.639 82 45.53 4835.80 150.43 4859.68 71.69 4963.24 130.10 2.639 83 47.63 4835.80 150.43 4859.68 73.39 4958.12 125.00 2.639 84 48.16 4835.80 148.85 4859.69 72.24 4958.46 125.00 2.639 85 47.63 4835.80 150.96 4859.68 73.81 4958.03 125.00 2.639 86 46.58 4835.80 153.06 4859.66 75.23 4957.47 125.00 2.639 87 47.11 4835.80 152.01 4859.67 74.53 4957.76 125.00 2.639 88 45.00 4835.80 152.01 4859.67 72.82 4962.89 130.10 2.640 89 46.05 4835.80 147.80 4859.70 69.68 4963.74 130.10 2.640 90 45.53 4835.80 150.96 4859.68 72.10 4963.16 130.10 2.640 91 48.16 4835.80 149.38 4859.69 72.66 4958.38 125.00 2.640 92 46.05 4835.80 148.33 4859.70 70.11 4963.66 130.10 2.641 93 46.05 4835.80 148.85 4859.69 70.53 4963.58 130.10 2.641 94 48.16 4835.80 149.91 4859.68 73.08 4958.29 125.00 2.641 95 46.05 4835.80 149.38 4859.69 70.95 4963.50 130.10 2.642 96 47.11 4835.80 152.54 4859.66 74.94 4957.66 125.00 2.642 97 47.63 4835.80 151.48 4859.67 74.23 4957.94 125.00 2.642 98 46.05 4835.80 154.64 4859.65 76.33 4957.08 125.00 2.643 99 48.16 4835.80 150.43 4859.68 73.50 4958.20 125.00 2.643 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4835.80 XR: 148.33 YR: 4859.70 Centre: XC: 71.16 YC: 4958.03 Radius: R: 125.00 Generated failure surface: (20 points) 45.00 4835.80 50.66 4834.72 56.37 4833.91 62.11 4833.36 67.86 4833.08 73.63 4833.06 79.39 4833.30 85.13 4833.82 90.84 4834.59 96.51 4835.63 102.12 4836.93 107.67 4838.48 113.15 4840.30 118.53 4842.36 123.81 4844.66 128.98 4847.21 134.03 4849.99 138.94 4853.01 143.71 4856.24 148.33 4859.70 Slice Geometry and Properties - Critical Failure Surface (circle 1, 43 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.59 -10.8 2.50 2.54 1 50.00 25.0 70.60 3070.70 1224.35 1.05 2 47.50 1.78 -10.8 2.50 2.54 1 50.00 25.0 205.71 3146.14 1279.25 1.05 3 50.00 0.74 -10.8 0.66 0.67 1 50.00 25.0 86.71 846.55 1321.76 1.05 4 50.66 5.64 -8.1 2.85 2.88 1 50.00 25.0 677.99 3664.85 1391.85 1.04 5 53.52 9.51 -8.1 2.85 2.88 1 50.00 25.0 1164.39 3738.09 1505.24 1.04 6 56.37 13.28 -5.5 2.87 2.88 1 50.00 25.0 1638.75 3799.35 1607.59 1.02 7 59.24 16.81 -5.5 2.87 2.88 1 50.00 25.0 2086.16 3848.87 1705.27 1.02 8 62.11 20.22 -2.8 2.88 2.88 1 50.00 25.0 2520.66 3886.35 1790.67 1.01 9 64.98 23.39 -2.8 2.88 2.88 1 50.00 25.0 2926.73 3911.94 1872.54 1.01 10 67.86 26.41 -0.2 2.88 2.88 1 50.00 25.0 3315.15 3925.58 1941.05 1.00 11 70.75 29.20 -0.2 2.88 2.88 1 50.00 25.0 3678.24 3927.25 2007.14 1.00 12 73.63 31.78 2.5 2.88 2.88 1 50.00 25.0 4015.50 3917.11 2058.85 0.99 13 76.51 34.19 2.4 2.88 2.88 1 50.00 25.0 4333.90 3894.86 2109.12 0.99 14 79.39 36.29 5.1 2.87 2.88 1 50.00 25.0 4615.66 3860.76 2144.14 0.99 15 82.26 38.30 5.1 2.87 2.88 1 50.00 25.0 4888.18 3814.73 2178.52 0.99 16 85.13 39.91 7.7 2.86 2.88 1 50.00 25.0 5111.64 3756.79 2197.08 0.99 17 87.98 41.52 7.7 2.86 2.88 1 50.00 25.0 5337.46 3687.07 2215.69 0.99 18 90.84 42.62 10.4 2.83 2.88 1 50.00 25.0 5500.10 3605.42 2217.83 0.98 19 93.67 43.83 10.4 2.83 2.88 1 50.00 25.0 5679.08 3512.18 2220.81 0.98 20 96.51 11.54 13.0 0.73 0.75 1 50.00 25.0 1499.48 902.73 2211.31 0.99 21 97.24 38.74 13.0 2.44 2.50 2 10.00 35.0 5035.60 2941.34 2183.39 0.97 22 99.68 39.34 13.0 2.44 2.50 2 10.00 35.0 5114.61 2853.12 2164.01 0.97 23 102.12 42.23 15.7 2.59 2.69 2 10.00 35.0 5489.55 2953.69 2123.11 0.97 24 104.71 42.58 15.7 2.59 2.69 2 10.00 35.0 5535.56 2832.03 2086.35 0.97 25 107.30 48.35 18.0 2.92 3.07 2 10.00 35.0 6246.79 3078.25 2044.94 0.97 26 110.22 48.37 18.3 2.92 3.08 2 10.00 35.0 6163.98 2898.23 2012.32 0.97 27 113.15 44.37 20.9 2.69 2.88 2 10.00 35.0 5578.85 2533.69 1959.84 0.97 28 115.84 44.01 20.9 2.69 2.88 2 10.00 35.0 5459.79 2348.41 1913.73 0.97 29 118.53 7.67 23.6 0.47 0.51 2 10.00 35.0 943.69 399.54 1870.42 0.98 30 119.00 37.90 23.6 2.41 2.62 2 10.00 35.0 4646.13 1934.68 1804.34 0.98 31 121.41 35.59 23.6 2.41 2.62 2 10.00 35.0 4338.97 1762.67 1683.18 0.98 32 123.81 35.48 26.2 2.59 2.88 2 10.00 35.0 4296.34 1726.42 1535.66 0.98 33 126.40 32.43 26.2 2.59 2.88 2 10.00 35.0 3892.88 1497.41 1388.57 0.98 34 128.98 20.79 28.9 1.81 2.07 2 10.00 35.0 2472.45 927.24 1245.68 0.99 35 130.79 19.11 28.9 1.81 2.07 2 10.00 35.0 2249.78 798.51 1130.56 0.99 36 132.60 13.29 28.9 1.43 1.63 2 10.00 35.0 1557.92 539.34 990.68 0.99 37 134.03 17.40 31.5 2.46 2.88 2 10.00 35.0 2049.56 746.79 750.65 1.01 38 136.48 10.36 31.5 2.46 2.88 2 10.00 35.0 1234.26 475.95 452.51 1.01 39 138.94 6.66 34.2 2.79 3.37 2 10.00 35.0 749.86 199.16 234.18 1.02 40 141.73 3.98 34.2 1.98 2.39 1 50.00 25.0 397.94 0.00 167.51 1.08 41 143.71 4.63 36.8 3.09 3.86 1 50.00 25.0 463.02 0.00 119.46 1.10 42 146.80 0.77 36.8 1.00 1.25 1 50.00 25.0 77.15 0.00 55.31 1.10 43 147.80 0.10 36.8 0.53 0.66 1 50.00 25.0 10.46 0.00 4.83 1.10 X-S Area: 1061.71 Path Length: 109.51 X-S Weight: 133357.20 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NE3-Mining-EQ.gmf Processed: 22 Jan 2026 09:20:33 DATA: Analysis 1 - Slope Stability - Case NE-3 - Mining Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (3 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4860.00 197.80 4860.00 Profile: 2 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4855.00 197.80 4855.00 Profile: 3 (3 points) Material beneath: 1 - Clay 0.00 4835.00 50.00 4835.80 197.80 4835.80 Slope Surface (10 points) 0.00 4835.80 50.00 4835.80 119.00 4858.80 132.60 4859.30 139.10 4855.70 146.80 4859.70 147.80 4859.70 161.00 4859.60 189.40 4859.50 197.80 4859.30 Phreatic Surface (2 points) 0.00 4854.90 223.00 4854.90 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4835.80 XR: 152.80 YR: 4859.66 Centre: XC: 46.15 YC: 5085.77 Radius: R: 250.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NE-3 - Mining Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 1.932 Analysis Summary There were: 13995 successful analyses from a total of 20001 trial failure surfaces 6006 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.70 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4835.80 153.06 4859.66 74.87 4957.18 125.00 1.696 <-- Critical Surface 2 45.00 4835.80 152.54 4859.66 74.46 4957.28 125.00 1.696 3 45.00 4835.80 152.01 4859.67 74.05 4957.38 125.00 1.696 4 45.00 4835.80 151.48 4859.67 73.64 4957.47 125.00 1.696 5 45.00 4835.80 150.96 4859.68 73.23 4957.57 125.00 1.697 6 45.00 4835.80 150.43 4859.68 72.82 4957.67 125.00 1.697 7 45.00 4835.80 153.59 4859.66 75.27 4957.08 125.00 1.697 8 45.00 4835.80 149.91 4859.68 72.40 4957.76 125.00 1.697 9 45.00 4835.80 149.38 4859.69 71.99 4957.85 125.00 1.698 10 45.00 4835.80 154.12 4859.65 75.68 4956.98 125.00 1.698 11 45.00 4835.80 148.85 4859.69 71.57 4957.94 125.00 1.699 12 45.00 4835.80 154.64 4859.65 76.08 4956.87 125.00 1.699 13 45.00 4835.80 148.33 4859.70 71.16 4958.03 125.00 1.699 14 45.00 4835.80 155.17 4859.64 76.48 4956.77 125.00 1.700 15 45.53 4835.80 153.06 4859.66 74.99 4957.28 125.00 1.701 16 45.00 4835.80 155.69 4859.64 76.88 4956.67 125.00 1.701 17 45.53 4835.80 152.01 4859.67 74.17 4957.47 125.00 1.701 18 45.53 4835.80 151.48 4859.67 73.76 4957.57 125.00 1.701 19 45.53 4835.80 152.54 4859.66 74.58 4957.38 125.00 1.701 20 45.53 4835.80 150.96 4859.68 73.35 4957.66 125.00 1.701 21 45.53 4835.80 150.43 4859.68 72.93 4957.76 125.00 1.701 22 45.53 4835.80 153.59 4859.66 75.40 4957.18 125.00 1.701 23 45.53 4835.80 149.91 4859.68 72.52 4957.85 125.00 1.701 24 45.00 4835.80 156.22 4859.64 77.28 4956.56 125.00 1.701 25 45.53 4835.80 149.38 4859.69 72.10 4957.94 125.00 1.702 26 45.53 4835.80 154.12 4859.65 75.80 4957.08 125.00 1.702 27 45.00 4835.80 147.80 4859.70 70.74 4958.12 125.00 1.702 28 45.00 4835.80 156.75 4859.63 77.68 4956.45 125.00 1.702 29 45.53 4835.80 148.85 4859.69 71.69 4958.03 125.00 1.702 30 45.00 4835.80 157.27 4859.63 78.08 4956.34 125.00 1.703 31 45.53 4835.80 154.64 4859.65 76.21 4956.98 125.00 1.703 32 45.00 4835.80 157.80 4859.62 78.48 4956.23 125.00 1.703 33 45.53 4835.80 147.80 4859.70 70.85 4958.21 125.00 1.704 34 45.53 4835.80 148.33 4859.70 71.27 4958.12 125.00 1.705 35 45.53 4835.80 155.69 4859.64 77.01 4956.77 125.00 1.705 36 46.05 4835.80 150.96 4859.68 73.46 4957.76 125.00 1.705 37 46.05 4835.80 151.48 4859.67 73.88 4957.66 125.00 1.705 38 46.05 4835.80 152.01 4859.67 74.29 4957.57 125.00 1.705 39 46.05 4835.80 150.43 4859.68 73.05 4957.85 125.00 1.705 40 46.05 4835.80 149.91 4859.68 72.64 4957.94 125.00 1.705 41 46.05 4835.80 152.54 4859.66 74.70 4957.47 125.00 1.705 42 46.05 4835.80 153.06 4859.66 75.11 4957.38 125.00 1.705 43 46.05 4835.80 149.38 4859.69 72.22 4958.03 125.00 1.705 44 45.53 4835.80 156.22 4859.64 77.41 4956.66 125.00 1.705 45 46.05 4835.80 154.12 4859.65 75.93 4957.18 125.00 1.705 46 46.05 4835.80 153.59 4859.66 75.52 4957.28 125.00 1.706 47 45.53 4835.80 155.17 4859.64 76.61 4956.87 125.00 1.706 48 45.53 4835.80 156.75 4859.63 77.81 4956.56 125.00 1.706 49 46.05 4835.80 154.64 4859.65 76.33 4957.08 125.00 1.707 50 45.53 4835.80 157.27 4859.63 78.21 4956.45 125.00 1.707 51 46.05 4835.80 148.33 4859.70 71.38 4958.21 125.00 1.707 52 46.05 4835.80 148.85 4859.69 71.80 4958.12 125.00 1.707 53 45.53 4835.80 157.80 4859.62 78.61 4956.34 125.00 1.708 54 46.05 4835.80 155.17 4859.64 76.74 4956.98 125.00 1.708 55 46.05 4835.80 155.69 4859.64 77.14 4956.87 125.00 1.709 56 46.58 4835.80 150.43 4859.68 73.17 4957.94 125.00 1.709 57 46.58 4835.80 150.96 4859.68 73.58 4957.85 125.00 1.709 58 46.58 4835.80 149.91 4859.68 72.75 4958.03 125.00 1.709 59 46.05 4835.80 147.80 4859.70 70.96 4958.29 125.00 1.709 60 46.58 4835.80 151.48 4859.67 74.00 4957.76 125.00 1.709 61 46.58 4835.80 152.01 4859.67 74.41 4957.66 125.00 1.709 62 46.58 4835.80 152.54 4859.66 74.82 4957.57 125.00 1.709 63 46.05 4835.80 156.22 4859.64 77.54 4956.77 125.00 1.710 64 46.58 4835.80 153.06 4859.66 75.23 4957.47 125.00 1.710 65 46.58 4835.80 148.85 4859.69 71.91 4958.21 125.00 1.710 66 46.58 4835.80 154.12 4859.65 76.05 4957.28 125.00 1.710 67 46.58 4835.80 153.59 4859.66 75.64 4957.37 125.00 1.710 68 46.58 4835.80 154.64 4859.65 76.46 4957.18 125.00 1.710 69 46.05 4835.80 156.75 4859.63 77.94 4956.66 125.00 1.710 70 46.58 4835.80 149.38 4859.69 72.33 4958.12 125.00 1.711 71 46.05 4835.80 157.27 4859.63 78.34 4956.56 125.00 1.711 72 46.58 4835.80 148.33 4859.70 71.49 4958.29 125.00 1.711 73 46.58 4835.80 155.17 4859.64 76.86 4957.08 125.00 1.711 74 46.05 4835.80 157.80 4859.62 78.74 4956.45 125.00 1.712 75 47.11 4835.80 150.43 4859.68 73.28 4958.03 125.00 1.712 76 47.11 4835.80 150.96 4859.68 73.70 4957.94 125.00 1.713 77 47.11 4835.80 151.48 4859.67 74.11 4957.85 125.00 1.713 78 46.58 4835.80 147.80 4859.70 71.07 4958.38 125.00 1.713 79 47.11 4835.80 149.38 4859.69 72.44 4958.21 125.00 1.713 80 47.11 4835.80 152.01 4859.67 74.53 4957.76 125.00 1.713 81 47.11 4835.80 152.54 4859.66 74.94 4957.66 125.00 1.713 82 46.58 4835.80 156.22 4859.64 77.67 4956.87 125.00 1.714 83 47.11 4835.80 153.06 4859.66 75.35 4957.57 125.00 1.714 84 47.11 4835.80 149.91 4859.68 72.86 4958.12 125.00 1.714 85 47.11 4835.80 148.85 4859.69 72.02 4958.29 125.00 1.714 86 46.58 4835.80 156.75 4859.63 78.07 4956.77 125.00 1.714 87 45.00 4835.80 150.96 4859.68 71.99 4963.07 130.10 1.715 88 45.00 4835.80 151.48 4859.67 72.41 4962.98 130.10 1.715 89 45.00 4835.80 150.43 4859.68 71.57 4963.16 130.10 1.715 90 45.00 4835.80 152.01 4859.67 72.82 4962.89 130.10 1.715 91 46.58 4835.80 155.69 4859.64 77.27 4956.97 125.00 1.715 92 47.11 4835.80 153.59 4859.66 75.76 4957.47 125.00 1.715 93 47.11 4835.80 154.12 4859.65 76.17 4957.37 125.00 1.715 94 45.00 4835.80 152.54 4859.66 73.23 4962.80 130.10 1.715 95 45.00 4835.80 153.06 4859.66 73.64 4962.71 130.10 1.715 96 47.11 4835.80 154.64 4859.65 76.58 4957.28 125.00 1.715 97 45.00 4835.80 153.59 4859.66 74.05 4962.62 130.10 1.715 98 45.00 4835.80 154.64 4859.65 74.87 4962.43 130.10 1.715 99 47.11 4835.80 155.17 4859.64 76.99 4957.18 125.00 1.715 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4835.80 XR: 153.06 YR: 4859.66 Centre: XC: 74.87 YC: 4957.18 Radius: R: 125.00 Generated failure surface: (20 points) 45.00 4835.80 50.89 4834.50 56.84 4833.49 62.83 4832.76 68.85 4832.32 74.88 4832.18 80.91 4832.33 86.93 4832.76 92.92 4833.49 98.86 4834.50 104.75 4835.81 110.58 4837.39 116.31 4839.25 121.96 4841.39 127.49 4843.80 132.90 4846.47 138.17 4849.40 143.30 4852.58 148.27 4856.00 153.06 4859.66 Slice Geometry and Properties - Critical Failure Surface (circle 1, 41 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.69 -12.4 2.50 2.56 1 50.00 25.0 81.55 3095.39 1232.39 1.09 2 47.50 2.07 -12.4 2.50 2.56 1 50.00 25.0 238.56 3183.33 1297.02 1.09 3 50.00 1.20 -12.4 0.89 0.91 1 50.00 25.0 140.41 1156.67 1351.73 1.09 4 50.89 6.98 -9.7 2.97 3.02 1 50.00 25.0 837.71 3887.67 1436.00 1.06 5 53.87 11.43 -9.7 2.97 3.02 1 50.00 25.0 1394.22 3983.07 1565.89 1.06 6 56.84 15.79 -6.9 2.99 3.02 1 50.00 25.0 1940.94 4064.88 1681.26 1.04 7 59.83 19.87 -6.9 2.99 3.02 1 50.00 25.0 2454.44 4133.18 1793.43 1.04 8 62.83 23.84 -4.1 3.01 3.02 1 50.00 25.0 2957.78 4187.91 1888.93 1.02 9 65.84 27.52 -4.1 3.01 3.02 1 50.00 25.0 3425.57 4228.94 1983.41 1.02 10 68.85 31.05 -1.4 3.02 3.02 1 50.00 25.0 3877.61 4256.26 2059.29 1.01 11 71.86 34.30 -1.4 3.02 3.02 1 50.00 25.0 4296.99 4269.94 2136.06 1.01 12 74.88 37.33 1.4 3.02 3.02 1 50.00 25.0 4690.81 4269.91 2192.58 0.99 13 77.89 40.14 1.4 3.02 3.02 1 50.00 25.0 5059.73 4256.19 2251.79 0.99 14 80.91 42.63 4.1 3.01 3.02 1 50.00 25.0 5390.00 4228.65 2289.32 0.98 15 83.92 44.99 4.2 3.01 3.02 1 50.00 25.0 5706.77 4187.63 2330.87 0.98 16 86.93 46.91 6.9 2.99 3.02 1 50.00 25.0 5969.39 4132.79 2349.77 0.97 17 89.92 48.81 6.9 2.99 3.02 1 50.00 25.0 6232.86 4064.41 2373.82 0.97 18 92.92 50.13 9.7 2.97 3.02 1 50.00 25.0 6424.63 3982.31 2374.36 0.97 19 95.89 51.56 9.7 2.97 3.02 1 50.00 25.0 6634.31 3886.92 2381.16 0.97 20 98.86 52.04 12.5 2.93 3.00 1 50.00 25.0 6722.82 3761.11 2363.65 0.97 21 101.79 53.01 12.5 2.93 3.00 1 50.00 25.0 6877.13 3639.79 2353.44 0.97 22 104.73 47.14 15.2 2.57 2.67 2 10.00 35.0 6128.85 3119.71 2282.40 0.93 23 107.30 60.60 15.2 3.28 3.39 2 10.00 35.0 7828.89 3802.95 2260.76 0.93 24 110.58 53.41 18.0 2.87 3.02 2 10.00 35.0 6812.50 3208.57 2217.70 0.93 25 113.44 53.48 18.0 2.87 3.02 2 10.00 35.0 6739.62 3033.13 2188.51 0.93 26 116.31 49.94 20.7 2.69 2.87 2 10.00 35.0 6217.72 2713.47 2127.57 0.92 27 119.00 53.28 20.7 2.96 3.16 2 10.00 35.0 6580.08 2775.24 2041.88 0.92 28 121.96 46.94 23.5 2.77 3.02 2 10.00 35.0 5768.97 2429.90 1888.48 0.92 29 124.72 43.89 23.5 2.77 3.02 2 10.00 35.0 5364.24 2203.33 1753.01 0.92 30 127.49 37.65 26.3 2.56 2.85 2 10.00 35.0 4572.17 1862.73 1594.20 0.93 31 130.04 34.67 26.3 2.56 2.85 2 10.00 35.0 4176.87 1638.35 1452.33 0.93 32 132.60 31.91 28.8 2.79 3.18 2 10.00 35.0 3848.96 1551.59 1213.87 0.93 33 135.39 23.30 29.0 2.79 3.19 2 10.00 35.0 2858.63 1248.25 905.05 0.93 34 138.17 5.82 31.8 0.93 1.09 2 10.00 35.0 728.59 355.38 688.60 0.94 35 139.10 11.81 31.8 2.10 2.47 2 10.00 35.0 1453.04 659.35 602.47 0.94 36 141.20 11.36 31.8 2.10 2.47 2 10.00 35.0 1326.62 458.59 537.97 0.94 37 143.30 16.92 34.6 3.37 4.09 2 10.00 35.0 1814.31 296.74 431.91 0.95 38 146.67 4.98 34.6 1.13 1.37 1 50.00 25.0 498.46 0.00 353.73 1.02 39 147.80 1.80 34.6 0.47 0.57 1 50.00 25.0 180.07 0.00 307.27 1.02 40 148.27 6.65 37.3 2.40 3.02 1 50.00 25.0 664.78 0.00 210.55 1.04 41 150.66 2.22 37.3 2.40 3.02 1 50.00 25.0 221.67 0.00 57.81 1.04 X-S Area: 1240.05 Path Length: 114.63 X-S Weight: 155139.25 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NWl-Mining.gmf Processed: 22 Jan 2026 09:21:01 DATA: Analysis 1 - Slope Stability - Case NW-1 - Mining Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4861.00 336.90 4861.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 135.40 4857.80 138.40 4857.80 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4855.00 135.40 4855.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 138.40 4855.00 336.90 4855.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4836.50 50.00 4837.00 135.40 4837.90 Profile: 6 (3 points) Material beneath: 1 - Clay 138.40 4837.90 232.80 4839.00 336.90 4839.00 Profile: 7 (2 points) Material beneath: 1 - Clay 135.40 4834.90 138.40 4834.90 Slope Surface (9 points) 0.00 4836.50 50.00 4837.00 111.90 4857.70 135.40 4857.80 138.40 4857.80 224.40 4858.00 238.30 4859.60 286.90 4860.70 336.90 4860.80 Phreatic Surface (5 points) 0.00 4836.50 50.00 4837.00 135.40 4838.90 138.40 4855.20 336.90 4855.20 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4837.00 XR: 291.90 YR: 4860.71 Centre: XC: 103.70 YC: 5534.94 Radius: R: 700.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 400.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-1 - Mining Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 5.134 Analysis Summary There were: 20001 successful analyses from a total of 20001 trial failure surfaces Critical (minimum) Factor of Safety: 4.49 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4836.95 286.90 4860.70 118.56 5331.51 500.00 4.495 <-- Critical Surface 2 45.00 4836.95 287.43 4860.70 118.93 5331.45 500.00 4.500 3 45.00 4836.95 287.95 4860.70 119.30 5331.40 500.00 4.504 4 45.00 4836.95 288.48 4860.70 119.67 5331.34 500.00 4.509 5 45.53 4836.96 286.90 4860.70 118.72 5331.57 500.00 4.509 6 45.00 4836.95 286.90 4860.70 117.74 5339.88 508.16 4.512 7 45.00 4836.95 289.01 4860.70 120.03 5331.29 500.00 4.513 8 45.53 4836.96 287.43 4860.70 119.09 5331.51 500.00 4.514 9 45.00 4836.95 287.43 4860.70 118.11 5339.83 508.16 4.516 10 45.00 4836.95 289.53 4860.71 120.40 5331.23 500.00 4.518 11 45.53 4836.96 287.95 4860.70 119.46 5331.46 500.00 4.518 12 45.00 4836.95 287.95 4860.70 118.48 5339.77 508.16 4.521 13 45.00 4836.95 290.06 4860.71 120.77 5331.18 500.00 4.522 14 45.53 4836.96 288.48 4860.70 119.83 5331.40 500.00 4.523 15 46.05 4836.96 286.90 4860.70 118.89 5331.63 500.00 4.524 16 45.00 4836.95 288.48 4860.70 118.85 5339.72 508.16 4.525 17 45.53 4836.96 286.90 4860.70 117.90 5339.94 508.16 4.526 18 45.00 4836.95 290.58 4860.71 121.14 5331.12 500.00 4.527 19 45.53 4836.96 289.01 4860.70 120.20 5331.35 500.00 4.527 20 46.05 4836.96 287.43 4860.70 119.26 5331.57 500.00 4.528 21 45.00 4836.95 289.01 4860.70 119.22 5339.66 508.16 4.530 22 45.53 4836.96 287.43 4860.70 118.27 5339.88 508.16 4.530 23 45.00 4836.95 286.90 4860.70 116.92 5348.24 516.33 4.531 24 45.00 4836.95 291.11 4860.71 121.50 5331.06 500.00 4.532 25 45.53 4836.96 289.53 4860.71 120.57 5331.29 500.00 4.532 26 46.05 4836.96 287.95 4860.70 119.63 5331.52 500.00 4.533 27 45.00 4836.95 289.53 4860.71 119.59 5339.61 508.16 4.534 28 45.53 4836.96 287.95 4860.70 118.64 5339.83 508.16 4.535 29 45.00 4836.95 291.64 4860.71 121.87 5331.01 500.00 4.536 30 45.53 4836.96 290.06 4860.71 120.94 5331.24 500.00 4.537 31 46.05 4836.96 288.48 4860.70 120.00 5331.46 500.00 4.537 32 45.00 4836.95 287.95 4860.70 117.66 5348.14 516.33 4.537 33 46.58 4836.97 286.90 4860.70 119.05 5331.69 500.00 4.538 34 45.00 4836.95 287.43 4860.70 117.29 5348.19 516.33 4.538 35 45.00 4836.95 290.06 4860.71 119.96 5339.55 508.16 4.539 36 45.53 4836.96 288.48 4860.70 119.01 5339.78 508.16 4.539 37 46.05 4836.96 286.90 4860.70 118.06 5340.00 508.16 4.540 38 45.00 4836.95 292.16 4860.71 122.23 5330.95 500.00 4.541 39 45.53 4836.96 290.58 4860.71 121.30 5331.18 500.00 4.541 40 45.00 4836.95 288.48 4860.70 118.03 5348.09 516.33 4.542 41 46.05 4836.96 289.01 4860.70 120.37 5331.41 500.00 4.542 42 45.53 4836.96 286.90 4860.70 117.08 5348.30 516.33 4.543 43 46.58 4836.97 287.43 4860.70 119.42 5331.63 500.00 4.543 44 45.00 4836.95 290.58 4860.71 120.33 5339.50 508.16 4.543 45 45.53 4836.96 289.01 4860.70 119.38 5339.72 508.16 4.544 46 46.05 4836.96 287.43 4860.70 118.44 5339.94 508.16 4.545 47 45.00 4836.95 286.90 4860.70 116.10 5356.60 524.49 4.546 48 45.00 4836.95 292.69 4860.71 122.60 5330.89 500.00 4.546 49 45.53 4836.96 291.11 4860.71 121.67 5331.12 500.00 4.546 50 45.00 4836.95 289.01 4860.70 118.40 5348.03 516.33 4.546 51 46.05 4836.96 289.53 4860.71 120.73 5331.35 500.00 4.547 52 46.58 4836.97 287.95 4860.70 119.79 5331.58 500.00 4.547 53 45.00 4836.95 291.11 4860.71 120.69 5339.44 508.16 4.548 54 45.53 4836.96 289.53 4860.71 119.75 5339.67 508.16 4.548 55 46.05 4836.96 287.95 4860.70 118.81 5339.89 508.16 4.549 56 45.53 4836.96 287.43 4860.70 117.45 5348.25 516.33 4.550 57 45.00 4836.95 287.43 4860.70 116.47 5356.55 524.49 4.550 58 45.00 4836.95 289.53 4860.71 118.78 5347.98 516.33 4.551 59 45.53 4836.96 291.64 4860.71 122.04 5331.07 500.00 4.551 60 45.00 4836.95 293.22 4860.71 122.96 5330.83 500.00 4.551 61 46.05 4836.96 290.06 4860.71 121.10 5331.30 500.00 4.551 62 46.58 4836.97 288.48 4860.70 120.16 5331.52 500.00 4.552 63 47.11 4836.97 286.90 4860.70 119.22 5331.74 500.00 4.552 64 45.00 4836.95 291.64 4860.71 121.06 5339.39 508.16 4.553 65 45.53 4836.96 290.06 4860.71 120.12 5339.61 508.16 4.553 66 46.05 4836.96 288.48 4860.70 119.18 5339.83 508.16 4.553 67 45.00 4836.95 287.95 4860.70 116.84 5356.50 524.49 4.554 68 45.00 4836.95 290.06 4860.71 119.15 5347.93 516.33 4.555 69 45.53 4836.96 288.48 4860.70 118.20 5348.14 516.33 4.556 70 46.05 4836.96 290.58 4860.71 121.47 5331.24 500.00 4.556 71 45.00 4836.95 293.74 4860.71 123.33 5330.78 500.00 4.556 72 46.05 4836.96 286.90 4860.70 117.24 5348.36 516.33 4.556 73 45.53 4836.96 292.16 4860.71 122.40 5331.01 500.00 4.556 74 46.58 4836.97 289.01 4860.70 120.53 5331.47 500.00 4.557 75 45.53 4836.96 287.95 4860.70 117.82 5348.19 516.33 4.557 76 47.11 4836.97 287.43 4860.70 119.59 5331.69 500.00 4.557 77 45.00 4836.95 292.16 4860.71 121.43 5339.33 508.16 4.557 78 45.53 4836.96 290.58 4860.71 120.49 5339.56 508.16 4.558 79 46.05 4836.96 289.01 4860.70 119.55 5339.78 508.16 4.558 80 46.58 4836.97 287.43 4860.70 118.60 5340.00 508.16 4.559 81 46.58 4836.97 286.90 4860.70 118.23 5340.05 508.16 4.559 82 45.00 4836.95 288.48 4860.70 117.22 5356.44 524.49 4.560 83 45.00 4836.95 290.58 4860.71 119.52 5347.87 516.33 4.560 84 45.53 4836.96 289.01 4860.70 118.57 5348.09 516.33 4.560 85 45.53 4836.96 286.90 4860.70 116.26 5356.65 524.49 4.560 86 46.05 4836.96 291.11 4860.71 121.84 5331.18 500.00 4.561 87 45.00 4836.95 294.27 4860.71 123.69 5330.72 500.00 4.561 88 46.05 4836.96 287.43 4860.70 117.61 5348.30 516.33 4.561 89 45.53 4836.96 292.69 4860.71 122.77 5330.95 500.00 4.561 90 46.58 4836.97 289.53 4860.71 120.90 5331.41 500.00 4.561 91 47.11 4836.97 287.95 4860.70 119.96 5331.64 500.00 4.562 92 45.00 4836.95 292.69 4860.71 121.79 5339.28 508.16 4.562 93 45.53 4836.96 291.11 4860.71 120.86 5339.50 508.16 4.562 94 46.05 4836.96 289.53 4860.71 119.92 5339.73 508.16 4.563 95 46.58 4836.97 287.95 4860.70 118.97 5339.95 508.16 4.563 96 45.00 4836.95 286.90 4860.70 115.28 5364.95 532.65 4.564 97 45.53 4836.96 287.43 4860.70 116.63 5356.60 524.49 4.564 98 45.00 4836.95 291.11 4860.71 119.89 5347.82 516.33 4.564 99 45.53 4836.96 289.53 4860.71 118.94 5348.04 516.33 4.565 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4836.95 XR: 286.90 YR: 4860.70 Centre: XC: 118.56 YC: 5331.51 Radius: R: 500.00 Generated failure surface: (20 points) 45.00 4836.95 57.81 4835.21 70.65 4833.81 83.53 4832.74 96.43 4832.00 109.34 4831.59 122.27 4831.52 135.19 4831.79 148.09 4832.38 160.98 4833.31 173.84 4834.58 186.66 4836.17 199.44 4838.10 212.17 4840.35 224.83 4842.93 237.42 4845.84 249.93 4849.08 262.35 4852.63 274.68 4856.51 286.90 4860.70 Slice Geometry and Properties - Critical Failure Surface (circle 1, 41 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.82 -7.7 5.00 5.05 1 50.00 25.0 209.17 114.53 43.64 1.02 2 50.00 19.99 -7.7 7.81 7.88 1 50.00 25.0 2304.56 660.20 299.81 1.02 3 57.81 37.38 -6.2 6.42 6.46 1 50.00 25.0 4311.36 960.07 678.50 1.02 4 64.23 55.69 -6.2 6.42 6.46 1 50.00 25.0 6423.72 1300.83 1010.55 1.02 5 70.65 73.66 -4.8 6.44 6.46 1 50.00 25.0 8497.53 1608.10 1330.05 1.01 6 77.09 90.97 -4.8 6.44 6.46 1 50.00 25.0 10495.80 1881.72 1642.73 1.01 7 83.53 107.96 -3.3 6.45 6.46 1 50.00 25.0 12456.60 2122.13 1941.36 1.01 8 89.98 124.26 -3.3 6.45 6.46 1 50.00 25.0 14338.28 2328.82 2234.62 1.01 9 96.43 161.84 -1.8 7.40 7.40 1 50.00 25.0 18677.20 2877.73 2532.25 1.00 10 103.83 133.78 -1.8 5.52 5.52 1 50.00 25.0 15362.76 2266.13 2792.00 1.00 11 109.34 65.65 -0.3 2.56 2.56 1 50.00 25.0 7489.85 1078.31 2931.83 1.00 12 111.90 135.50 -0.3 5.18 5.18 1 50.00 25.0 15430.86 2221.28 2978.78 1.00 13 117.08 135.77 -0.3 5.18 5.18 1 50.00 25.0 15464.14 2268.02 2985.23 1.00 14 122.27 169.04 1.2 6.46 6.46 1 50.00 25.0 19258.20 2858.76 2975.75 1.00 15 128.73 168.37 1.2 6.46 6.46 1 50.00 25.0 19185.26 2863.49 2964.48 1.00 16 135.19 83.39 2.6 3.21 3.22 1 50.00 25.0 8857.91 2933.20 2745.90 1.00 17 138.40 124.84 2.6 4.85 4.85 1 50.00 25.0 15408.15 7009.50 3170.46 1.00 18 143.25 123.81 2.6 4.85 4.85 1 50.00 25.0 15284.57 6941.65 3145.02 1.00 19 148.09 162.49 4.1 6.44 6.46 1 50.00 25.0 20070.48 9105.44 3101.03 1.00 20 154.54 159.59 4.1 6.44 6.46 1 50.00 25.0 19728.17 8918.03 3048.09 1.00 21 160.98 155.81 5.6 6.43 6.46 1 50.00 25.0 19281.83 8696.98 2980.96 0.99 22 167.41 151.85 5.6 6.43 6.46 1 50.00 25.0 18817.46 8442.42 2909.08 0.99 23 173.84 146.92 7.1 6.41 6.46 1 50.00 25.0 18238.96 8154.43 2823.17 0.99 24 180.25 141.91 7.1 6.41 6.46 1 50.00 25.0 17653.96 7833.18 2732.45 0.99 25 186.66 135.88 8.6 6.39 6.46 1 50.00 25.0 16946.65 7478.26 2627.87 1.00 26 193.05 129.83 8.6 6.39 6.46 1 50.00 25.0 16242.11 7090.17 2518.38 1.00 27 199.44 61.01 10.0 3.12 3.17 1 50.00 25.0 7652.90 3323.97 2428.06 1.00 28 202.56 90.69 10.1 4.80 4.88 2 10.00 35.0 11378.77 4909.05 2331.94 0.99 29 207.36 86.66 10.0 4.80 4.88 2 10.00 35.0 10852.69 4649.89 2223.96 0.99 30 212.17 104.02 11.5 6.12 6.24 2 10.00 35.0 12994.15 5542.10 2085.69 0.99 31 218.28 96.47 11.5 6.12 6.24 2 10.00 35.0 12010.30 5055.88 1927.42 0.99 32 224.40 96.25 12.9 6.51 6.68 2 10.00 35.0 11872.95 4839.09 1785.81 0.99 33 230.91 91.34 13.0 6.51 6.68 2 10.00 35.0 11088.34 4214.13 1665.89 0.99 34 237.42 81.32 14.5 6.26 6.46 2 10.00 35.0 9717.60 3446.76 1513.45 0.99 35 243.67 72.09 14.5 6.26 6.46 2 10.00 35.0 8491.47 2795.02 1321.11 0.99 36 249.93 61.92 16.0 6.21 6.46 2 10.00 35.0 7148.92 2110.66 1115.14 1.00 37 256.14 51.75 16.0 6.21 6.46 2 10.00 35.0 5800.29 1393.72 902.55 1.00 38 262.35 48.31 17.5 7.53 7.90 2 10.00 35.0 5121.63 682.05 651.55 1.00 39 269.88 22.13 17.5 4.79 5.03 1 50.00 25.0 2212.74 0.00 443.56 1.02 40 274.68 17.95 18.9 6.11 6.46 1 50.00 25.0 1794.87 0.00 279.92 1.02 41 280.79 5.98 18.9 6.11 6.46 1 50.00 25.0 598.29 0.00 90.85 1.02 X-S Area: 3985.88 Path Length: 245.52 X-S Weight: 475171.47 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NWl-Mining-EQ.gmf Processed: 22 Jan 2026 09:21:33 DATA: Analysis 1 - Slope Stability - Case NW-1 - Mining Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4861.00 336.90 4861.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 135.40 4857.80 138.40 4857.80 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4855.00 135.40 4855.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 138.40 4855.00 336.90 4855.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4836.50 50.00 4837.00 135.40 4837.90 Profile: 6 (3 points) Material beneath: 1 - Clay 138.40 4837.90 232.80 4839.00 336.90 4839.00 Profile: 7 (2 points) Material beneath: 1 - Clay 135.40 4834.90 138.40 4834.90 Slope Surface (9 points) 0.00 4836.50 50.00 4837.00 111.90 4857.70 135.40 4857.80 138.40 4857.80 224.40 4858.00 238.30 4859.60 286.90 4860.70 336.90 4860.80 Phreatic Surface (5 points) 0.00 4836.50 50.00 4837.00 135.40 4838.90 138.40 4855.20 336.90 4855.20 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4837.00 XR: 291.90 YR: 4860.71 Centre: XC: 103.70 YC: 5534.94 Radius: R: 700.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 400.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-1 - Mining Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.722 Analysis Summary There were: 20001 successful analyses from a total of 20001 trial failure surfaces Critical (minimum) Factor of Safety: 2.40 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4836.95 296.90 4860.72 125.51 5330.43 500.00 2.403 <-- Critical Surface 2 45.00 4836.95 296.37 4860.72 125.14 5330.49 500.00 2.404 3 45.00 4836.95 295.85 4860.72 124.78 5330.54 500.00 2.404 4 45.00 4836.95 295.32 4860.72 124.42 5330.60 500.00 2.404 5 45.00 4836.95 294.79 4860.72 124.06 5330.66 500.00 2.404 6 45.00 4836.95 294.27 4860.71 123.69 5330.72 500.00 2.404 7 45.00 4836.95 293.74 4860.71 123.33 5330.78 500.00 2.404 8 45.00 4836.95 293.22 4860.71 122.96 5330.83 500.00 2.405 9 45.00 4836.95 292.69 4860.71 122.60 5330.89 500.00 2.405 10 45.00 4836.95 292.16 4860.71 122.23 5330.95 500.00 2.405 11 45.00 4836.95 291.64 4860.71 121.87 5331.01 500.00 2.405 12 45.00 4836.95 291.11 4860.71 121.50 5331.06 500.00 2.405 13 45.00 4836.95 290.58 4860.71 121.14 5331.12 500.00 2.406 14 45.00 4836.95 290.06 4860.71 120.77 5331.18 500.00 2.406 15 45.00 4836.95 289.53 4860.71 120.40 5331.23 500.00 2.406 16 45.00 4836.95 289.01 4860.70 120.03 5331.29 500.00 2.406 17 45.00 4836.95 288.48 4860.70 119.67 5331.34 500.00 2.407 18 45.00 4836.95 287.95 4860.70 119.30 5331.40 500.00 2.407 19 45.00 4836.95 287.43 4860.70 118.93 5331.45 500.00 2.407 20 45.00 4836.95 286.90 4860.70 118.56 5331.51 500.00 2.408 21 45.53 4836.96 296.90 4860.72 125.68 5330.49 500.00 2.409 22 45.53 4836.96 296.37 4860.72 125.31 5330.55 500.00 2.409 23 45.53 4836.96 295.85 4860.72 124.95 5330.61 500.00 2.409 24 45.53 4836.96 295.32 4860.72 124.59 5330.66 500.00 2.409 25 45.53 4836.96 294.79 4860.72 124.23 5330.72 500.00 2.409 26 45.53 4836.96 294.27 4860.71 123.86 5330.78 500.00 2.410 27 45.53 4836.96 293.74 4860.71 123.50 5330.84 500.00 2.410 28 45.53 4836.96 293.22 4860.71 123.13 5330.90 500.00 2.410 29 45.53 4836.96 292.69 4860.71 122.77 5330.95 500.00 2.410 30 45.53 4836.96 292.16 4860.71 122.40 5331.01 500.00 2.410 31 45.53 4836.96 291.64 4860.71 122.04 5331.07 500.00 2.410 32 45.53 4836.96 291.11 4860.71 121.67 5331.12 500.00 2.411 33 45.53 4836.96 290.58 4860.71 121.30 5331.18 500.00 2.411 34 45.53 4836.96 290.06 4860.71 120.94 5331.24 500.00 2.411 35 45.53 4836.96 289.53 4860.71 120.57 5331.29 500.00 2.411 36 45.53 4836.96 289.01 4860.70 120.20 5331.35 500.00 2.412 37 45.53 4836.96 288.48 4860.70 119.83 5331.40 500.00 2.412 38 45.53 4836.96 287.95 4860.70 119.46 5331.46 500.00 2.412 39 45.53 4836.96 287.43 4860.70 119.09 5331.51 500.00 2.413 40 45.00 4836.95 296.90 4860.72 124.71 5338.82 508.16 2.413 41 45.00 4836.95 296.37 4860.72 124.35 5338.88 508.16 2.413 42 45.00 4836.95 295.85 4860.72 123.99 5338.94 508.16 2.413 43 45.53 4836.96 286.90 4860.70 118.72 5331.57 500.00 2.413 44 45.00 4836.95 295.32 4860.72 123.62 5338.99 508.16 2.413 45 45.00 4836.95 294.79 4860.72 123.26 5339.05 508.16 2.413 46 45.00 4836.95 294.27 4860.71 122.89 5339.11 508.16 2.414 47 45.00 4836.95 293.74 4860.71 122.53 5339.17 508.16 2.414 48 45.00 4836.95 293.22 4860.71 122.16 5339.22 508.16 2.414 49 45.00 4836.95 292.69 4860.71 121.79 5339.28 508.16 2.414 50 45.00 4836.95 292.16 4860.71 121.43 5339.33 508.16 2.414 51 45.00 4836.95 291.64 4860.71 121.06 5339.39 508.16 2.414 52 46.05 4836.96 296.90 4860.72 125.85 5330.55 500.00 2.415 53 46.05 4836.96 296.37 4860.72 125.49 5330.61 500.00 2.415 54 46.05 4836.96 295.85 4860.72 125.12 5330.67 500.00 2.415 55 46.05 4836.96 295.32 4860.72 124.76 5330.73 500.00 2.415 56 45.00 4836.95 291.11 4860.71 120.69 5339.44 508.16 2.415 57 46.05 4836.96 294.79 4860.72 124.40 5330.78 500.00 2.415 58 46.05 4836.96 294.27 4860.71 124.03 5330.84 500.00 2.415 59 45.00 4836.95 290.58 4860.71 120.33 5339.50 508.16 2.415 60 46.05 4836.96 293.74 4860.71 123.67 5330.90 500.00 2.415 61 45.00 4836.95 290.06 4860.71 119.96 5339.55 508.16 2.415 62 46.05 4836.96 293.22 4860.71 123.30 5330.96 500.00 2.415 63 46.05 4836.96 292.69 4860.71 122.94 5331.01 500.00 2.416 64 45.00 4836.95 289.53 4860.71 119.59 5339.61 508.16 2.416 65 46.05 4836.96 292.16 4860.71 122.57 5331.07 500.00 2.416 66 45.00 4836.95 289.01 4860.70 119.22 5339.66 508.16 2.416 67 46.05 4836.96 291.64 4860.71 122.21 5331.13 500.00 2.416 68 46.05 4836.96 291.11 4860.71 121.84 5331.18 500.00 2.416 69 45.00 4836.95 288.48 4860.70 118.85 5339.72 508.16 2.416 70 46.05 4836.96 290.58 4860.71 121.47 5331.24 500.00 2.416 71 46.05 4836.96 290.06 4860.71 121.10 5331.30 500.00 2.417 72 45.00 4836.95 287.95 4860.70 118.48 5339.77 508.16 2.417 73 46.05 4836.96 289.53 4860.71 120.73 5331.35 500.00 2.417 74 45.00 4836.95 287.43 4860.70 118.11 5339.83 508.16 2.417 75 46.05 4836.96 289.01 4860.70 120.37 5331.41 500.00 2.417 76 45.00 4836.95 286.90 4860.70 117.74 5339.88 508.16 2.417 77 46.05 4836.96 288.48 4860.70 120.00 5331.46 500.00 2.417 78 46.05 4836.96 287.95 4860.70 119.63 5331.52 500.00 2.418 79 46.05 4836.96 287.43 4860.70 119.26 5331.57 500.00 2.418 80 45.53 4836.96 296.90 4860.72 124.88 5338.88 508.16 2.418 81 45.53 4836.96 296.37 4860.72 124.52 5338.94 508.16 2.418 82 46.05 4836.96 286.90 4860.70 118.89 5331.63 500.00 2.418 83 45.53 4836.96 295.85 4860.72 124.16 5339.00 508.16 2.418 84 45.53 4836.96 295.32 4860.72 123.79 5339.06 508.16 2.418 85 45.53 4836.96 294.79 4860.72 123.43 5339.11 508.16 2.418 86 45.53 4836.96 294.27 4860.71 123.06 5339.17 508.16 2.419 87 45.53 4836.96 293.74 4860.71 122.69 5339.22 508.16 2.419 88 45.53 4836.96 293.22 4860.71 122.33 5339.28 508.16 2.419 89 45.53 4836.96 292.69 4860.71 121.96 5339.34 508.16 2.419 90 45.53 4836.96 292.16 4860.71 121.60 5339.39 508.16 2.419 91 45.53 4836.96 291.64 4860.71 121.23 5339.45 508.16 2.420 92 45.53 4836.96 291.11 4860.71 120.86 5339.50 508.16 2.420 93 46.58 4836.97 296.90 4860.72 126.02 5330.61 500.00 2.420 94 46.58 4836.97 296.37 4860.72 125.66 5330.67 500.00 2.420 95 45.53 4836.96 290.58 4860.71 120.49 5339.56 508.16 2.420 96 46.58 4836.97 295.85 4860.72 125.29 5330.73 500.00 2.420 97 46.58 4836.97 295.32 4860.72 124.93 5330.79 500.00 2.420 98 46.58 4836.97 294.79 4860.72 124.57 5330.85 500.00 2.420 99 46.58 4836.97 294.27 4860.71 124.20 5330.90 500.00 2.420 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4836.95 XR: 296.90 YR: 4860.72 Centre: XC: 125.51 YC: 5330.43 Radius: R: 500.00 Generated failure surface: (20 points) 45.00 4836.95 58.32 4834.96 71.68 4833.33 85.08 4832.06 98.51 4831.16 111.97 4830.61 125.43 4830.43 138.89 4830.61 152.34 4831.15 165.77 4832.05 179.18 4833.31 192.54 4834.94 205.86 4836.92 219.11 4839.27 232.30 4841.97 245.42 4845.02 258.44 4848.42 271.37 4852.18 284.19 4856.28 296.90 4860.72 Slice Geometry and Properties - Critical Failure Surface (circle 1, 42 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.99 -8.5 5.00 5.06 1 50.00 25.0 229.10 125.69 49.64 1.04 2 50.00 23.35 -8.5 8.32 8.41 1 50.00 25.0 2690.82 792.06 333.65 1.04 3 58.32 42.39 -6.9 6.68 6.73 1 50.00 25.0 4888.25 1136.22 747.80 1.03 4 65.00 62.76 -7.0 6.68 6.73 1 50.00 25.0 7239.21 1541.09 1106.73 1.03 5 71.68 82.80 -5.4 6.70 6.73 1 50.00 25.0 9551.37 1907.83 1448.65 1.02 6 78.38 102.07 -5.4 6.70 6.73 1 50.00 25.0 11775.32 2237.00 1785.79 1.02 7 85.08 121.02 -3.9 6.72 6.73 1 50.00 25.0 13962.06 2528.21 2103.00 1.02 8 91.80 139.14 -3.9 6.72 6.73 1 50.00 25.0 16054.74 2781.48 2418.20 1.02 9 98.51 122.51 -2.3 5.31 5.32 1 50.00 25.0 14136.85 2352.23 2679.84 1.01 10 103.83 206.49 -2.3 8.07 8.08 1 50.00 25.0 23665.22 3787.36 2951.28 1.01 11 111.90 183.63 -0.8 6.76 6.76 1 50.00 25.0 20919.26 3329.24 3100.29 1.00 12 118.66 184.45 -0.8 6.76 6.76 1 50.00 25.0 21018.57 3431.87 3114.85 1.00 13 125.43 136.18 0.8 4.99 4.99 1 50.00 25.0 15521.32 2574.74 3105.67 1.00 14 130.41 135.95 0.8 4.99 4.99 1 50.00 25.0 15498.09 2588.57 3101.03 1.00 15 135.40 81.66 0.8 3.00 3.00 1 50.00 25.0 8725.14 3083.59 2903.25 1.00 16 138.40 188.77 2.2 6.97 6.98 1 50.00 25.0 23219.39 10652.71 3317.10 0.99 17 145.37 186.92 2.3 6.97 6.98 1 50.00 25.0 22997.04 10531.30 3284.60 0.99 18 152.34 177.75 3.8 6.72 6.73 1 50.00 25.0 21878.21 10008.21 3233.37 0.99 19 159.06 174.83 3.8 6.72 6.73 1 50.00 25.0 21531.94 9818.47 3182.12 0.99 20 165.77 170.92 5.4 6.70 6.73 1 50.00 25.0 21070.52 9591.00 3111.24 0.99 21 172.47 166.79 5.4 6.70 6.73 1 50.00 25.0 20585.76 9325.38 3039.50 0.99 22 179.18 161.58 6.9 6.68 6.73 1 50.00 25.0 19973.34 9021.97 2948.59 0.98 23 185.86 156.25 6.9 6.68 6.73 1 50.00 25.0 19351.22 8680.41 2856.49 0.98 24 192.54 149.78 8.5 6.66 6.73 1 50.00 25.0 18592.94 8301.55 2745.78 0.98 25 199.20 143.28 8.5 6.66 6.73 1 50.00 25.0 17835.96 7884.79 2633.54 0.98 26 205.86 109.77 10.0 5.34 5.42 1 50.00 25.0 13706.25 6021.52 2516.15 0.98 27 211.19 104.81 10.0 5.34 5.42 1 50.00 25.0 13129.30 5702.62 2409.69 0.98 28 216.53 48.93 10.0 2.58 2.62 2 10.00 35.0 6137.51 2644.82 2308.84 0.97 29 219.11 96.14 11.6 5.29 5.40 2 10.00 35.0 12039.63 5182.96 2202.50 0.96 30 224.40 136.71 11.6 7.90 8.07 2 10.00 35.0 16976.87 7069.07 2075.78 0.96 31 232.30 99.50 13.1 6.00 6.16 2 10.00 35.0 12187.51 4816.93 1951.99 0.96 32 238.30 110.22 13.1 7.12 7.31 2 10.00 35.0 13351.46 5019.42 1800.00 0.96 33 245.42 90.96 14.6 6.51 6.73 2 10.00 35.0 10899.25 3919.57 1595.35 0.96 34 251.93 80.83 14.6 6.51 6.73 2 10.00 35.0 9554.19 3204.61 1395.91 0.96 35 258.44 69.62 16.2 6.46 6.73 2 10.00 35.0 8074.72 2452.97 1178.98 0.96 36 264.90 58.43 16.2 6.46 6.73 2 10.00 35.0 6591.75 1664.58 958.34 0.96 37 271.37 33.20 17.7 4.42 4.64 2 10.00 35.0 3613.49 670.76 759.59 0.96 38 275.79 27.40 17.7 4.42 4.64 2 10.00 35.0 2846.97 262.20 593.31 0.96 39 280.20 19.78 17.7 3.99 4.19 1 50.00 25.0 1977.61 0.00 460.39 0.99 40 284.19 10.61 19.3 2.71 2.87 1 50.00 25.0 1061.39 0.00 360.28 0.99 41 286.90 13.04 19.3 5.00 5.30 1 50.00 25.0 1303.96 0.00 237.40 0.99 42 291.90 4.35 19.3 5.00 5.30 1 50.00 25.0 434.81 0.00 74.62 0.99 X-S Area: 4417.56 Path Length: 255.79 X-S Weight: 526798.31 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NW2-Mining.gmf Processed: 22 Jan 2026 09:22:04 DATA: Analysis 1 - Slope Stability - Case NW-2 - Mining Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4858.00 219.60 4858.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 138.90 4857.00 141.90 4857.00 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4848.00 138.90 4848.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 141.90 4848.00 219.60 4848.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4835.90 50.00 4835.40 138.90 4834.50 Profile: 6 (3 points) Material beneath: 1 - Clay 141.90 4834.50 160.20 4834.30 219.60 4834.40 Profile: 7 (2 points) Material beneath: 1 - Clay 138.90 4831.50 141.90 4831.50 Slope Surface (10 points) 0.00 4835.90 50.00 4835.40 115.40 4857.20 138.90 4857.00 141.90 4857.00 169.60 4856.80 183.30 4857.00 198.50 4857.20 212.30 4855.20 219.60 4855.00 Phreatic Surface (6 points) 0.00 4835.90 50.00 4835.40 138.90 4836.40 141.90 4855.20 212.30 4855.20 219.60 4855.00 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4835.40 XR: 174.60 YR: 4856.87 Centre: XC: 62.49 YC: 5135.14 Radius: R: 300.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-2 - Mining Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 3.881 Analysis Summary There were: 17139 successful analyses from a total of 20001 trial failure surfaces 2862 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.97 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4835.45 179.60 4856.95 86.88 5005.36 175.00 2.973 <-- Critical Surface 2 45.00 4835.45 179.07 4856.94 86.51 5005.46 175.00 2.979 3 45.00 4835.45 178.02 4856.92 85.77 5005.63 175.00 2.983 4 45.00 4835.45 178.55 4856.93 86.14 5005.54 175.00 2.987 5 45.53 4835.44 179.60 4856.95 87.02 5005.45 175.00 2.987 6 45.53 4835.44 179.07 4856.94 86.65 5005.54 175.00 2.993 7 45.00 4835.45 177.49 4856.92 85.40 5005.72 175.00 2.997 8 45.53 4835.44 178.55 4856.93 86.28 5005.63 175.00 2.999 9 46.05 4835.44 179.60 4856.95 87.16 5005.54 175.00 3.002 10 45.00 4835.45 176.97 4856.91 85.03 5005.81 175.00 3.002 11 45.00 4835.45 176.44 4856.90 84.66 5005.90 175.00 3.006 12 46.05 4835.44 179.07 4856.94 86.79 5005.63 175.00 3.008 13 45.53 4835.44 178.02 4856.92 85.91 5005.72 175.00 3.009 14 45.53 4835.44 177.49 4856.92 85.54 5005.81 175.00 3.011 15 45.00 4835.45 175.92 4856.89 84.28 5005.98 175.00 3.012 16 46.05 4835.44 178.55 4856.93 86.42 5005.72 175.00 3.014 17 45.53 4835.44 176.97 4856.91 85.17 5005.90 175.00 3.017 18 45.00 4835.45 175.39 4856.88 83.91 5006.07 175.00 3.017 19 46.58 4835.43 179.60 4856.95 87.31 5005.63 175.00 3.017 20 45.00 4835.45 179.60 4856.95 86.01 5010.82 180.10 3.018 21 45.53 4835.44 176.44 4856.90 84.79 5005.98 175.00 3.020 22 46.05 4835.44 178.02 4856.92 86.05 5005.81 175.00 3.021 23 45.00 4835.45 174.86 4856.88 83.53 5006.15 175.00 3.022 24 46.58 4835.43 179.07 4856.94 86.93 5005.72 175.00 3.023 25 45.00 4835.45 179.07 4856.94 85.64 5010.91 180.10 3.024 26 46.05 4835.44 177.49 4856.92 85.68 5005.89 175.00 3.025 27 45.53 4835.44 175.92 4856.89 84.42 5006.07 175.00 3.026 28 45.00 4835.45 174.34 4856.87 83.16 5006.24 175.00 3.027 29 46.58 4835.43 178.55 4856.93 86.56 5005.81 175.00 3.028 30 46.05 4835.44 176.97 4856.91 85.30 5005.98 175.00 3.031 31 45.53 4835.44 175.39 4856.88 84.04 5006.15 175.00 3.031 32 45.00 4835.45 173.81 4856.86 82.78 5006.32 175.00 3.032 33 47.11 4835.43 179.60 4856.95 87.45 5005.72 175.00 3.032 34 45.00 4835.45 178.55 4856.93 85.27 5010.99 180.10 3.032 35 45.53 4835.44 179.60 4856.95 86.15 5010.91 180.10 3.033 36 46.05 4835.44 176.44 4856.90 84.93 5006.07 175.00 3.034 37 46.58 4835.43 178.02 4856.92 86.19 5005.89 175.00 3.035 38 45.00 4835.45 173.28 4856.85 82.40 5006.41 175.00 3.035 39 45.53 4835.44 174.86 4856.88 83.67 5006.24 175.00 3.036 40 45.00 4835.45 178.02 4856.92 84.89 5011.08 180.10 3.036 41 47.11 4835.43 179.07 4856.94 87.07 5005.80 175.00 3.037 42 45.53 4835.44 179.07 4856.94 85.78 5010.99 180.10 3.039 43 46.05 4835.44 175.92 4856.89 84.56 5006.15 175.00 3.039 44 45.53 4835.44 174.34 4856.87 83.29 5006.32 175.00 3.041 45 45.00 4835.45 177.49 4856.92 84.52 5011.16 180.10 3.042 46 47.11 4835.43 178.55 4856.93 86.70 5005.89 175.00 3.043 47 45.00 4835.45 172.76 4856.85 82.03 5006.49 175.00 3.043 48 46.58 4835.43 177.49 4856.92 85.82 5005.98 175.00 3.045 49 46.05 4835.44 175.39 4856.88 84.18 5006.24 175.00 3.045 50 46.58 4835.43 176.97 4856.91 85.44 5006.06 175.00 3.045 51 45.53 4835.44 178.55 4856.93 85.40 5011.08 180.10 3.045 52 45.00 4835.45 176.97 4856.91 84.14 5011.25 180.10 3.045 53 45.53 4835.44 173.81 4856.86 82.92 5006.40 175.00 3.045 54 45.00 4835.45 172.23 4856.84 81.65 5006.57 175.00 3.047 55 47.63 4835.42 179.60 4856.95 87.58 5005.80 175.00 3.047 56 46.05 4835.44 179.60 4856.95 86.29 5010.99 180.10 3.047 57 46.58 4835.43 176.44 4856.90 85.07 5006.15 175.00 3.049 58 47.11 4835.43 178.02 4856.92 86.33 5005.98 175.00 3.049 59 45.53 4835.44 172.76 4856.85 82.16 5006.57 175.00 3.049 60 45.53 4835.44 173.28 4856.85 82.54 5006.49 175.00 3.049 61 46.05 4835.44 174.86 4856.88 83.80 5006.32 175.00 3.050 62 45.00 4835.45 176.44 4856.90 83.77 5011.33 180.10 3.050 63 47.63 4835.42 179.07 4856.94 87.21 5005.89 175.00 3.052 64 46.05 4835.44 179.07 4856.94 85.91 5011.07 180.10 3.053 65 46.58 4835.43 175.92 4856.89 84.69 5006.23 175.00 3.054 66 46.05 4835.44 174.34 4856.87 83.43 5006.40 175.00 3.054 67 45.53 4835.44 178.02 4856.92 85.03 5011.16 180.10 3.055 68 45.53 4835.44 177.49 4856.92 84.66 5011.24 180.10 3.055 69 45.00 4835.45 171.71 4856.83 81.27 5006.65 175.00 3.055 70 45.00 4835.45 175.92 4856.89 83.39 5011.41 180.10 3.056 71 45.00 4835.45 171.18 4856.82 80.89 5006.73 175.00 3.057 72 47.11 4835.43 177.49 4856.92 85.95 5006.06 175.00 3.057 73 47.63 4835.42 178.55 4856.93 86.84 5005.98 175.00 3.057 74 47.11 4835.43 176.97 4856.91 85.58 5006.15 175.00 3.058 75 46.05 4835.44 178.55 4856.93 85.54 5011.16 180.10 3.058 76 46.58 4835.43 175.39 4856.88 84.31 5006.32 175.00 3.059 77 46.05 4835.44 173.81 4856.86 83.05 5006.48 175.00 3.059 78 45.53 4835.44 176.97 4856.91 84.28 5011.33 180.10 3.059 79 45.00 4835.45 175.39 4856.88 83.02 5011.49 180.10 3.061 80 46.58 4835.43 179.60 4856.95 86.43 5011.07 180.10 3.061 81 48.16 4835.42 179.60 4856.95 87.72 5005.89 175.00 3.062 82 45.00 4835.45 170.65 4856.82 80.51 5006.81 175.00 3.063 83 45.00 4835.45 179.60 4856.95 85.14 5016.25 185.20 3.063 84 47.11 4835.43 176.44 4856.90 85.20 5006.23 175.00 3.063 85 46.58 4835.43 174.86 4856.88 83.94 5006.40 175.00 3.063 86 47.63 4835.42 178.02 4856.92 86.46 5006.06 175.00 3.063 87 45.53 4835.44 172.23 4856.84 81.78 5006.65 175.00 3.063 88 46.05 4835.44 173.28 4856.85 82.67 5006.57 175.00 3.064 89 45.53 4835.44 176.44 4856.90 83.90 5011.41 180.10 3.064 90 45.53 4835.44 171.71 4856.83 81.40 5006.73 175.00 3.065 91 45.00 4835.45 174.86 4856.88 82.64 5011.57 180.10 3.065 92 46.58 4835.43 179.07 4856.94 86.05 5011.16 180.10 3.066 93 46.05 4835.44 178.02 4856.92 85.17 5011.24 180.10 3.067 94 48.16 4835.42 179.07 4856.94 87.35 5005.97 175.00 3.067 95 46.05 4835.44 172.76 4856.85 82.29 5006.65 175.00 3.067 96 47.11 4835.43 175.92 4856.89 84.82 5006.32 175.00 3.068 97 46.05 4835.44 177.49 4856.92 84.79 5011.33 180.10 3.068 98 46.58 4835.43 174.34 4856.87 83.56 5006.48 175.00 3.068 99 45.00 4835.45 170.13 4856.81 80.12 5006.89 175.00 3.068 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4835.45 XR: 179.60 YR: 4856.95 Centre: XC: 86.88 YC: 5005.36 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4835.45 52.19 4833.84 59.44 4832.53 66.74 4831.53 74.08 4830.83 81.44 4830.45 88.80 4830.38 96.17 4830.61 103.52 4831.16 110.83 4832.01 118.11 4833.17 125.33 4834.64 132.48 4836.41 139.56 4838.48 146.53 4840.85 153.41 4843.50 160.16 4846.45 166.79 4849.67 173.27 4853.17 179.60 4856.95 Slice Geometry and Properties - Critical Failure Surface (circle 1, 43 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.67 -12.6 2.50 2.56 1 50.00 25.0 77.07 42.86 35.25 1.06 2 47.50 2.01 -12.6 2.50 2.56 1 50.00 25.0 231.21 128.58 97.94 1.06 3 50.00 3.68 -12.6 2.19 2.24 1 50.00 25.0 424.37 186.20 201.74 1.06 4 52.19 11.69 -10.2 3.63 3.68 1 50.00 25.0 1349.12 444.86 382.55 1.05 5 55.82 18.44 -10.2 3.63 3.68 1 50.00 25.0 2129.83 604.58 602.88 1.05 6 59.44 25.10 -7.8 3.65 3.68 1 50.00 25.0 2899.79 746.83 809.84 1.03 7 63.09 31.37 -7.8 3.65 3.68 1 50.00 25.0 3625.10 871.43 1012.19 1.03 8 66.74 37.55 -5.4 3.67 3.68 1 50.00 25.0 4340.39 978.29 1198.78 1.02 9 70.41 43.31 -5.4 3.67 3.68 1 50.00 25.0 5006.63 1067.41 1382.80 1.02 10 74.08 48.94 -3.0 3.68 3.68 1 50.00 25.0 5658.58 1138.92 1549.05 1.01 11 77.76 54.16 -3.0 3.68 3.68 1 50.00 25.0 6262.90 1192.57 1714.52 1.01 12 81.44 50.84 -0.6 3.18 3.18 1 50.00 25.0 5880.12 1060.11 1850.36 1.00 13 84.62 54.32 -0.6 3.18 3.18 1 50.00 25.0 6283.29 1073.49 1977.20 1.00 14 87.80 17.85 -0.6 1.00 1.00 1 50.00 25.0 2062.61 341.34 2058.26 1.00 15 88.80 68.17 1.8 3.68 3.68 1 50.00 25.0 7835.66 1246.68 2118.43 1.00 16 92.49 72.26 1.8 3.68 3.68 1 50.00 25.0 8242.20 1229.16 2228.30 1.00 17 96.17 75.89 4.2 3.67 3.68 1 50.00 25.0 8596.14 1193.82 2315.21 0.99 18 99.84 79.38 4.2 3.67 3.68 1 50.00 25.0 8935.09 1140.61 2406.23 0.99 19 103.52 82.26 6.7 3.66 3.68 1 50.00 25.0 9203.22 1069.44 2473.04 0.99 20 107.18 85.16 6.7 3.66 3.68 1 50.00 25.0 9474.02 980.66 2545.23 0.99 21 110.83 54.47 9.1 2.28 2.31 1 50.00 25.0 6033.99 563.00 2582.25 0.99 22 113.12 55.38 9.1 2.28 2.31 1 50.00 25.0 6113.65 514.14 2615.71 0.99 23 115.40 65.69 9.1 2.71 2.75 1 50.00 25.0 7238.84 547.12 2607.23 0.99 24 118.11 85.10 11.5 3.60 3.68 1 50.00 25.0 9372.63 607.23 2522.96 0.99 25 121.71 82.36 11.5 3.60 3.68 1 50.00 25.0 9062.49 448.63 2438.15 0.99 26 125.32 75.13 13.9 3.41 3.51 2 10.00 35.0 8236.69 264.57 2286.85 0.97 27 128.73 72.16 13.9 3.41 3.51 2 10.00 35.0 7855.17 88.26 2178.25 0.97 28 132.13 68.48 16.1 3.38 3.52 2 10.00 35.0 7415.91 0.00 2051.78 0.97 29 135.52 65.03 16.3 3.38 3.53 2 10.00 35.0 7020.89 0.00 1940.45 0.97 30 138.90 12.22 16.3 0.66 0.68 3 0.00 45.0 1222.30 3.08 1695.94 0.95 31 139.56 42.47 18.7 2.34 2.47 3 0.00 45.0 4457.75 1386.52 1764.70 0.95 32 141.90 40.15 18.7 2.32 2.45 2 10.00 35.0 4844.32 2371.55 2006.48 0.98 33 144.22 38.29 18.7 2.32 2.45 2 10.00 35.0 4603.76 2251.73 1906.69 0.98 34 146.53 53.07 21.1 3.44 3.68 2 10.00 35.0 6347.22 3147.29 1763.02 0.98 35 149.97 48.42 21.1 3.44 3.68 2 10.00 35.0 5745.36 2841.95 1595.57 0.98 36 153.41 42.78 23.5 3.38 3.68 2 10.00 35.0 5023.59 2519.86 1411.32 0.99 37 156.78 37.72 23.6 3.38 3.68 2 10.00 35.0 4369.00 2181.56 1226.97 0.99 38 160.16 30.73 26.0 3.19 3.55 2 10.00 35.0 3491.98 1766.14 1031.76 1.00 39 163.35 27.46 26.0 3.43 3.82 1 50.00 25.0 3074.34 1517.02 852.12 1.03 40 166.79 17.94 28.4 2.81 3.20 1 50.00 25.0 1995.27 951.24 668.77 1.05 41 169.60 17.04 28.4 3.67 4.17 1 50.00 25.0 1870.36 785.32 476.13 1.05 42 173.27 9.15 30.8 3.40 3.96 1 50.00 25.0 966.59 250.11 256.22 1.06 43 176.67 2.49 30.8 2.93 3.41 1 50.00 25.0 249.34 0.00 68.67 1.06 X-S Area: 1906.80 Path Length: 140.00 X-S Weight: 215128.78 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NW2-Mining-EQ.gmf Processed: 22 Jan 2026 09:22:37 DATA: Analysis 1 - Slope Stability - Case NW-2 - Mining Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4858.00 219.60 4858.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 138.90 4857.00 141.90 4857.00 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4848.00 138.90 4848.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 141.90 4848.00 219.60 4848.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4835.90 50.00 4835.40 138.90 4834.50 Profile: 6 (3 points) Material beneath: 1 - Clay 141.90 4834.50 160.20 4834.30 219.60 4834.40 Profile: 7 (2 points) Material beneath: 1 - Clay 138.90 4831.50 141.90 4831.50 Slope Surface (10 points) 0.00 4835.90 50.00 4835.40 115.40 4857.20 138.90 4857.00 141.90 4857.00 169.60 4856.80 183.30 4857.00 198.50 4857.20 212.30 4855.20 219.60 4855.00 Phreatic Surface (6 points) 0.00 4835.90 50.00 4835.40 138.90 4836.40 141.90 4855.20 212.30 4855.20 219.60 4855.00 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4835.40 XR: 174.60 YR: 4856.87 Centre: XC: 62.49 YC: 5135.14 Radius: R: 300.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-2 - Mining Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.708 Analysis Summary There were: 17139 successful analyses from a total of 20001 trial failure surfaces 2862 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.05 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4835.45 179.60 4856.95 86.88 5005.36 175.00 2.053 <-- Critical Surface 2 45.00 4835.45 179.07 4856.94 86.51 5005.46 175.00 2.060 3 45.53 4835.44 179.60 4856.95 87.02 5005.45 175.00 2.062 4 45.00 4835.45 178.55 4856.93 86.14 5005.54 175.00 2.068 5 45.00 4835.45 178.02 4856.92 85.77 5005.63 175.00 2.068 6 45.53 4835.44 179.07 4856.94 86.65 5005.54 175.00 2.069 7 46.05 4835.44 179.60 4856.95 87.16 5005.54 175.00 2.071 8 45.53 4835.44 178.55 4856.93 86.28 5005.63 175.00 2.076 9 46.05 4835.44 179.07 4856.94 86.79 5005.63 175.00 2.078 10 45.00 4835.45 177.49 4856.92 85.40 5005.72 175.00 2.080 11 46.58 4835.43 179.60 4856.95 87.31 5005.63 175.00 2.081 12 45.00 4835.45 179.60 4856.95 86.01 5010.82 180.10 2.084 13 46.05 4835.44 178.55 4856.93 86.42 5005.72 175.00 2.085 14 45.53 4835.44 178.02 4856.92 85.91 5005.72 175.00 2.085 15 45.00 4835.45 176.97 4856.91 85.03 5005.81 175.00 2.087 16 46.58 4835.43 179.07 4856.94 86.93 5005.72 175.00 2.087 17 45.53 4835.44 177.49 4856.92 85.54 5005.81 175.00 2.089 18 47.11 4835.43 179.60 4856.95 87.45 5005.72 175.00 2.090 19 45.00 4835.45 179.07 4856.94 85.64 5010.91 180.10 2.091 20 45.00 4835.45 176.44 4856.90 84.66 5005.90 175.00 2.092 21 46.05 4835.44 178.02 4856.92 86.05 5005.81 175.00 2.092 22 45.53 4835.44 179.60 4856.95 86.15 5010.91 180.10 2.093 23 46.58 4835.43 178.55 4856.93 86.56 5005.81 175.00 2.094 24 45.53 4835.44 176.97 4856.91 85.17 5005.90 175.00 2.096 25 47.11 4835.43 179.07 4856.94 87.07 5005.80 175.00 2.096 26 46.05 4835.44 177.49 4856.92 85.68 5005.89 175.00 2.098 27 45.00 4835.45 175.92 4856.89 84.28 5005.98 175.00 2.098 28 45.00 4835.45 178.55 4856.93 85.27 5010.99 180.10 2.099 29 47.63 4835.42 179.60 4856.95 87.58 5005.80 175.00 2.099 30 45.53 4835.44 179.07 4856.94 85.78 5010.99 180.10 2.100 31 46.58 4835.43 178.02 4856.92 86.19 5005.89 175.00 2.101 32 45.53 4835.44 176.44 4856.90 84.79 5005.98 175.00 2.101 33 46.05 4835.44 179.60 4856.95 86.29 5010.99 180.10 2.102 34 47.11 4835.43 178.55 4856.93 86.70 5005.89 175.00 2.103 35 45.00 4835.45 178.02 4856.92 84.89 5011.08 180.10 2.104 36 46.05 4835.44 176.97 4856.91 85.30 5005.98 175.00 2.105 37 45.00 4835.45 175.39 4856.88 83.91 5006.07 175.00 2.105 38 47.63 4835.42 179.07 4856.94 87.21 5005.89 175.00 2.106 39 45.53 4835.44 178.55 4856.93 85.40 5011.08 180.10 2.107 40 45.53 4835.44 175.92 4856.89 84.42 5006.07 175.00 2.107 41 48.16 4835.42 179.60 4856.95 87.72 5005.89 175.00 2.108 42 46.05 4835.44 179.07 4856.94 85.91 5011.07 180.10 2.108 43 47.11 4835.43 178.02 4856.92 86.33 5005.98 175.00 2.110 44 46.05 4835.44 176.44 4856.90 84.93 5006.07 175.00 2.110 45 46.58 4835.43 177.49 4856.92 85.82 5005.98 175.00 2.110 46 45.00 4835.45 177.49 4856.92 84.52 5011.16 180.10 2.111 47 46.58 4835.43 179.60 4856.95 86.43 5011.07 180.10 2.111 48 45.00 4835.45 174.86 4856.88 83.53 5006.15 175.00 2.111 49 47.63 4835.42 178.55 4856.93 86.84 5005.98 175.00 2.112 50 46.58 4835.43 176.97 4856.91 85.44 5006.06 175.00 2.114 51 45.53 4835.44 175.39 4856.88 84.04 5006.15 175.00 2.114 52 45.00 4835.45 179.60 4856.95 85.14 5016.25 185.20 2.114 53 48.16 4835.42 179.07 4856.94 87.35 5005.97 175.00 2.115 54 46.05 4835.44 178.55 4856.93 85.54 5011.16 180.10 2.115 55 45.00 4835.45 176.97 4856.91 84.14 5011.25 180.10 2.116 56 45.53 4835.44 178.02 4856.92 85.03 5011.16 180.10 2.116 57 46.05 4835.44 175.92 4856.89 84.56 5006.15 175.00 2.116 58 46.58 4835.43 179.07 4856.94 86.05 5011.16 180.10 2.117 59 45.00 4835.45 174.34 4856.87 83.16 5006.24 175.00 2.118 60 48.68 4835.41 179.60 4856.95 87.86 5005.97 175.00 2.118 61 47.11 4835.43 177.49 4856.92 85.95 5006.06 175.00 2.118 62 47.63 4835.42 178.02 4856.92 86.46 5006.06 175.00 2.119 63 46.58 4835.43 176.44 4856.90 85.07 5006.15 175.00 2.119 64 45.53 4835.44 177.49 4856.92 84.66 5011.24 180.10 2.119 65 47.11 4835.43 179.60 4856.95 86.56 5011.16 180.10 2.120 66 45.53 4835.44 174.86 4856.88 83.67 5006.24 175.00 2.120 67 45.00 4835.45 179.07 4856.94 84.77 5016.33 185.20 2.121 68 48.16 4835.42 178.55 4856.93 86.97 5006.06 175.00 2.121 69 47.11 4835.43 176.97 4856.91 85.58 5006.15 175.00 2.121 70 45.53 4835.44 179.60 4856.95 85.28 5016.33 185.20 2.122 71 45.00 4835.45 176.44 4856.90 83.77 5011.33 180.10 2.122 72 46.05 4835.44 175.39 4856.88 84.18 5006.24 175.00 2.123 73 46.05 4835.44 178.02 4856.92 85.17 5011.24 180.10 2.123 74 45.00 4835.45 173.81 4856.86 82.78 5006.32 175.00 2.124 75 46.58 4835.43 178.55 4856.93 85.68 5011.24 180.10 2.124 76 48.68 4835.41 179.07 4856.94 87.48 5006.06 175.00 2.124 77 45.53 4835.44 176.97 4856.91 84.28 5011.33 180.10 2.125 78 47.63 4835.42 177.49 4856.92 86.09 5006.15 175.00 2.125 79 46.58 4835.43 175.92 4856.89 84.69 5006.23 175.00 2.125 80 47.11 4835.43 179.07 4856.94 86.19 5011.24 180.10 2.126 81 45.53 4835.44 174.34 4856.87 83.29 5006.32 175.00 2.126 82 49.21 4835.41 179.60 4856.95 88.00 5006.06 175.00 2.127 83 46.05 4835.44 177.49 4856.92 84.79 5011.33 180.10 2.127 84 48.16 4835.42 178.02 4856.92 86.60 5006.14 175.00 2.128 85 47.11 4835.43 176.44 4856.90 85.20 5006.23 175.00 2.128 86 47.63 4835.42 179.60 4856.95 86.70 5011.24 180.10 2.129 87 45.00 4835.45 175.92 4856.89 83.39 5011.41 180.10 2.129 88 45.00 4835.45 173.28 4856.85 82.40 5006.41 175.00 2.129 89 46.05 4835.44 174.86 4856.88 83.80 5006.32 175.00 2.129 90 45.00 4835.45 178.55 4856.93 84.39 5016.42 185.20 2.129 91 45.53 4835.44 179.07 4856.94 84.90 5016.41 185.20 2.129 92 46.58 4835.43 178.02 4856.92 85.30 5011.32 180.10 2.130 93 48.68 4835.41 178.55 4856.93 87.11 5006.14 175.00 2.130 94 46.05 4835.44 179.60 4856.95 85.41 5016.41 185.20 2.131 95 45.53 4835.44 176.44 4856.90 83.90 5011.41 180.10 2.131 96 46.58 4835.43 175.39 4856.88 84.31 5006.32 175.00 2.131 97 45.53 4835.44 173.81 4856.86 82.92 5006.40 175.00 2.132 98 47.11 4835.43 178.55 4856.93 85.81 5011.32 180.10 2.133 99 45.00 4835.45 178.02 4856.92 84.02 5016.50 185.20 2.133 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4835.45 XR: 179.60 YR: 4856.95 Centre: XC: 86.88 YC: 5005.36 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4835.45 52.19 4833.84 59.44 4832.53 66.74 4831.53 74.08 4830.83 81.44 4830.45 88.80 4830.38 96.17 4830.61 103.52 4831.16 110.83 4832.01 118.11 4833.17 125.33 4834.64 132.48 4836.41 139.56 4838.48 146.53 4840.85 153.41 4843.50 160.16 4846.45 166.79 4849.67 173.27 4853.17 179.60 4856.95 Slice Geometry and Properties - Critical Failure Surface (circle 1, 43 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.67 -12.6 2.50 2.56 1 50.00 25.0 77.07 42.86 37.34 1.08 2 47.50 2.01 -12.6 2.50 2.56 1 50.00 25.0 231.21 128.58 100.51 1.08 3 50.00 3.68 -12.6 2.19 2.24 1 50.00 25.0 424.37 186.20 205.50 1.08 4 52.19 11.69 -10.2 3.63 3.68 1 50.00 25.0 1349.12 444.86 387.43 1.06 5 55.82 18.44 -10.2 3.63 3.68 1 50.00 25.0 2129.83 604.58 610.09 1.06 6 59.44 25.10 -7.8 3.65 3.68 1 50.00 25.0 2899.79 746.83 816.95 1.04 7 63.09 31.37 -7.8 3.65 3.68 1 50.00 25.0 3625.10 871.43 1020.98 1.04 8 66.74 37.55 -5.4 3.67 3.68 1 50.00 25.0 4340.39 978.29 1205.85 1.03 9 70.41 43.31 -5.4 3.67 3.68 1 50.00 25.0 5006.63 1067.41 1390.95 1.03 10 74.08 48.94 -3.0 3.68 3.68 1 50.00 25.0 5658.58 1138.92 1554.06 1.01 11 77.76 54.16 -3.0 3.68 3.68 1 50.00 25.0 6262.90 1192.57 1720.07 1.01 12 81.44 50.84 -0.6 3.18 3.18 1 50.00 25.0 5880.12 1060.11 1851.52 1.00 13 84.62 54.32 -0.6 3.18 3.18 1 50.00 25.0 6283.29 1073.49 1978.43 1.00 14 87.80 17.85 -0.6 1.00 1.00 1 50.00 25.0 2062.61 341.34 2059.58 1.00 15 88.80 68.17 1.8 3.68 3.68 1 50.00 25.0 7835.66 1246.68 2114.20 0.99 16 92.49 72.26 1.8 3.68 3.68 1 50.00 25.0 8242.20 1229.16 2223.84 0.99 17 96.17 75.89 4.2 3.67 3.68 1 50.00 25.0 8596.14 1193.82 2304.43 0.99 18 99.84 79.38 4.2 3.67 3.68 1 50.00 25.0 8935.09 1140.61 2394.91 0.99 19 103.52 82.26 6.7 3.66 3.68 1 50.00 25.0 9203.22 1069.44 2454.74 0.98 20 107.18 85.16 6.7 3.66 3.68 1 50.00 25.0 9474.02 980.66 2526.14 0.98 21 110.83 54.47 9.1 2.28 2.31 1 50.00 25.0 6033.99 563.00 2555.78 0.98 22 113.12 55.38 9.1 2.28 2.31 1 50.00 25.0 6113.65 514.14 2588.61 0.98 23 115.40 65.69 9.1 2.71 2.75 1 50.00 25.0 7238.84 547.12 2580.01 0.98 24 118.11 85.10 11.5 3.60 3.68 1 50.00 25.0 9372.63 607.23 2489.32 0.98 25 121.71 82.36 11.5 3.60 3.68 1 50.00 25.0 9062.49 448.63 2405.06 0.98 26 125.32 75.13 13.9 3.41 3.51 2 10.00 35.0 8236.69 264.57 2233.29 0.95 27 128.73 72.16 13.9 3.41 3.51 2 10.00 35.0 7855.17 88.26 2126.07 0.95 28 132.13 68.48 16.1 3.38 3.52 2 10.00 35.0 7415.91 0.00 1994.59 0.95 29 135.52 65.03 16.3 3.38 3.53 2 10.00 35.0 7020.89 0.00 1885.55 0.95 30 138.90 12.22 16.3 0.66 0.68 3 0.00 45.0 1222.30 3.08 1630.70 0.91 31 139.56 42.47 18.7 2.34 2.47 3 0.00 45.0 4457.75 1386.52 1711.90 0.91 32 141.90 40.15 18.7 2.32 2.45 2 10.00 35.0 4844.32 2371.55 1972.78 0.95 33 144.22 38.29 18.7 2.32 2.45 2 10.00 35.0 4603.76 2251.73 1874.60 0.95 34 146.53 53.07 21.1 3.44 3.68 2 10.00 35.0 6347.22 3147.29 1729.74 0.95 35 149.97 48.42 21.1 3.44 3.68 2 10.00 35.0 5745.36 2841.95 1565.35 0.95 36 153.41 42.78 23.5 3.38 3.68 2 10.00 35.0 5023.59 2519.86 1381.63 0.95 37 156.78 37.72 23.6 3.38 3.68 2 10.00 35.0 4369.00 2181.56 1200.97 0.95 38 160.16 30.73 26.0 3.19 3.55 2 10.00 35.0 3491.98 1766.14 1007.60 0.95 39 163.35 27.46 26.0 3.43 3.82 1 50.00 25.0 3074.34 1517.02 834.80 1.00 40 166.79 17.94 28.4 2.81 3.20 1 50.00 25.0 1995.27 951.24 652.59 1.01 41 169.60 17.04 28.4 3.67 4.17 1 50.00 25.0 1870.36 785.32 462.78 1.01 42 173.27 9.15 30.8 3.40 3.96 1 50.00 25.0 966.59 250.11 245.15 1.03 43 176.67 2.49 30.8 2.93 3.41 1 50.00 25.0 249.34 0.00 62.18 1.03 X-S Area: 1906.80 Path Length: 140.00 X-S Weight: 215128.78 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NW3-Mining.gmf Processed: 22 Jan 2026 09:23:11 DATA: Analysis 1 - Slope Stability - Case NW-3 - Mining Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4857.00 243.20 4857.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 140.80 4855.30 143.80 4855.30 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4852.00 140.80 4852.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 143.80 4852.00 243.20 4852.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4833.60 50.00 4832.90 140.80 4832.70 Profile: 6 (2 points) Material beneath: 1 - Clay 143.80 4832.70 243.20 4833.20 Profile: 7 (2 points) Material beneath: 1 - Clay 140.80 4829.70 143.80 4829.70 Slope Surface (11 points) 0.00 4833.60 50.00 4832.90 117.30 4855.30 140.80 4855.30 143.80 4855.30 193.20 4855.10 199.40 4855.20 213.70 4856.60 227.80 4856.40 237.60 4854.00 243.20 4854.00 Phreatic Surface (5 points) 0.00 4833.60 50.00 4832.90 140.80 4833.90 143.80 4854.90 243.20 4854.90 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4832.90 XR: 198.15 YR: 4855.18 Centre: XC: 80.87 YC: 5131.31 Radius: R: 300.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-3 - Mining Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 3.609 Analysis Summary There were: 19966 successful analyses from a total of 20001 trial failure surfaces 35 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.69 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4832.97 199.47 4855.21 99.91 4999.13 175.00 2.692 <-- Critical Surface 2 45.00 4832.97 200.52 4855.31 100.52 4998.93 175.00 2.696 3 45.00 4832.97 199.99 4855.26 100.22 4999.03 175.00 2.697 4 45.00 4832.97 201.04 4855.36 100.83 4998.83 175.00 2.698 5 45.00 4832.97 201.57 4855.41 101.14 4998.72 175.00 2.700 6 45.53 4832.96 199.47 4855.21 100.08 4999.24 175.00 2.700 7 45.00 4832.97 202.10 4855.46 101.44 4998.62 175.00 2.702 8 45.00 4832.97 198.94 4855.19 99.57 4999.24 175.00 2.704 9 45.00 4832.97 202.62 4855.52 101.75 4998.51 175.00 2.705 10 45.53 4832.96 199.99 4855.26 100.38 4999.14 175.00 2.706 11 45.00 4832.97 203.15 4855.57 102.05 4998.41 175.00 2.707 12 45.53 4832.96 201.04 4855.36 100.99 4998.94 175.00 2.709 13 45.53 4832.96 200.52 4855.31 100.69 4999.04 175.00 2.709 14 45.53 4832.96 201.57 4855.41 101.30 4998.84 175.00 2.711 15 45.53 4832.96 202.10 4855.46 101.60 4998.73 175.00 2.713 16 46.05 4832.96 199.99 4855.26 100.54 4999.25 175.00 2.715 17 45.53 4832.96 202.62 4855.52 101.91 4998.63 175.00 2.716 18 45.00 4832.97 198.41 4855.18 99.22 4999.36 175.00 2.716 19 45.00 4832.97 201.04 4855.36 100.02 5004.46 180.10 2.717 20 45.53 4832.96 203.15 4855.57 102.22 4998.53 175.00 2.718 21 46.05 4832.96 200.52 4855.31 100.85 4999.15 175.00 2.718 22 45.53 4832.96 198.94 4855.19 99.73 4999.36 175.00 2.720 23 45.00 4832.97 201.57 4855.41 100.33 5004.36 180.10 2.720 24 45.00 4832.97 202.10 4855.46 100.63 5004.26 180.10 2.722 25 46.05 4832.96 201.04 4855.36 101.16 4999.05 175.00 2.722 26 45.00 4832.97 195.78 4855.14 97.47 4999.92 175.00 2.723 27 46.05 4832.96 202.10 4855.46 101.77 4998.85 175.00 2.724 28 46.05 4832.96 199.47 4855.21 100.24 4999.35 175.00 2.725 29 45.00 4832.97 202.62 4855.52 100.94 5004.17 180.10 2.725 30 46.58 4832.95 199.99 4855.26 100.71 4999.37 175.00 2.726 31 46.05 4832.96 201.57 4855.41 101.46 4998.95 175.00 2.726 32 46.05 4832.96 202.62 4855.52 102.07 4998.75 175.00 2.727 33 45.00 4832.97 203.15 4855.57 101.24 5004.06 180.10 2.729 34 45.00 4832.97 193.68 4855.11 96.06 5000.35 175.00 2.729 35 46.58 4832.95 200.52 4855.31 101.01 4999.27 175.00 2.729 36 46.05 4832.96 203.15 4855.57 102.38 4998.64 175.00 2.729 37 45.00 4832.97 194.20 4855.12 96.42 5000.25 175.00 2.730 38 45.00 4832.97 194.73 4855.12 96.77 5000.14 175.00 2.731 39 45.00 4832.97 196.31 4855.15 97.82 4999.81 175.00 2.731 40 46.58 4832.95 201.04 4855.36 101.32 4999.17 175.00 2.731 41 45.53 4832.96 201.57 4855.41 100.49 5004.47 180.10 2.731 42 45.00 4832.97 195.26 4855.13 97.12 5000.03 175.00 2.732 43 45.53 4832.96 202.10 4855.46 100.79 5004.38 180.10 2.733 44 45.00 4832.97 200.52 4855.31 99.72 5004.56 180.10 2.734 45 45.53 4832.96 198.41 4855.18 99.38 4999.47 175.00 2.734 46 45.53 4832.96 202.62 4855.52 101.10 5004.28 180.10 2.735 47 46.58 4832.95 201.57 4855.41 101.63 4999.06 175.00 2.735 48 45.00 4832.97 196.83 4855.16 98.17 4999.70 175.00 2.736 49 46.05 4832.96 198.94 4855.19 99.89 4999.47 175.00 2.737 50 45.53 4832.96 203.15 4855.57 101.41 5004.18 180.10 2.738 51 45.00 4832.97 197.36 4855.17 98.52 4999.58 175.00 2.738 52 45.53 4832.96 195.78 4855.14 97.63 5000.03 175.00 2.738 53 46.58 4832.95 202.62 4855.52 102.24 4998.86 175.00 2.738 54 45.00 4832.97 193.15 4855.10 95.71 5000.46 175.00 2.739 55 46.58 4832.95 202.10 4855.46 101.93 4998.96 175.00 2.739 56 45.53 4832.96 201.04 4855.36 100.18 5004.57 180.10 2.740 57 45.00 4832.97 197.89 4855.18 98.87 4999.47 175.00 2.740 58 45.53 4832.96 193.68 4855.11 96.22 5000.46 175.00 2.740 59 47.11 4832.94 200.52 4855.31 101.17 4999.38 175.00 2.741 60 45.53 4832.96 194.20 4855.12 96.57 5000.35 175.00 2.741 61 46.58 4832.95 199.47 4855.21 100.40 4999.47 175.00 2.742 62 46.58 4832.95 203.15 4855.57 102.54 4998.76 175.00 2.742 63 46.05 4832.96 201.57 4855.41 100.65 5004.58 180.10 2.742 64 45.53 4832.96 194.73 4855.12 96.93 5000.24 175.00 2.742 65 47.11 4832.94 201.04 4855.36 101.48 4999.28 175.00 2.743 66 45.53 4832.96 195.26 4855.13 97.28 5000.14 175.00 2.743 67 45.00 4832.97 202.62 4855.52 100.13 5009.78 185.20 2.744 68 46.05 4832.96 195.26 4855.13 97.44 5000.24 175.00 2.745 69 46.05 4832.96 202.10 4855.46 100.96 5004.48 180.10 2.745 70 47.11 4832.94 201.57 4855.41 101.79 4999.18 175.00 2.745 71 45.00 4832.97 199.99 4855.26 99.41 5004.66 180.10 2.745 72 45.53 4832.96 196.31 4855.15 97.98 4999.92 175.00 2.745 73 46.05 4832.96 202.62 4855.52 101.26 5004.39 180.10 2.746 74 45.00 4832.97 203.15 4855.57 100.44 5009.68 185.20 2.747 75 45.53 4832.96 196.83 4855.16 98.33 4999.81 175.00 2.748 76 46.05 4832.96 203.15 4855.57 101.57 5004.29 180.10 2.748 77 47.11 4832.94 202.10 4855.46 102.09 4999.08 175.00 2.748 78 47.11 4832.94 199.99 4855.26 100.87 4999.48 175.00 2.749 79 45.53 4832.96 197.36 4855.17 98.68 4999.69 175.00 2.749 80 45.53 4832.96 193.15 4855.10 95.86 5000.57 175.00 2.750 81 45.53 4832.96 200.52 4855.31 99.88 5004.67 180.10 2.750 82 46.05 4832.96 193.68 4855.11 96.37 5000.56 175.00 2.751 83 45.53 4832.96 197.89 4855.18 99.03 4999.58 175.00 2.751 84 47.63 4832.93 200.52 4855.31 101.34 4999.49 175.00 2.752 85 46.05 4832.96 194.20 4855.12 96.73 5000.46 175.00 2.752 86 46.58 4832.95 201.57 4855.41 100.81 5004.69 180.10 2.752 87 46.05 4832.96 195.78 4855.14 97.79 5000.13 175.00 2.752 88 47.11 4832.94 203.15 4855.57 102.71 4998.87 175.00 2.753 89 45.00 4832.97 196.31 4855.15 97.00 5005.40 180.10 2.753 90 46.05 4832.96 194.73 4855.12 97.08 5000.35 175.00 2.753 91 47.11 4832.94 202.62 4855.52 102.40 4998.97 175.00 2.754 92 46.58 4832.95 198.94 4855.19 100.05 4999.58 175.00 2.754 93 47.63 4832.93 201.04 4855.36 101.64 4999.39 175.00 2.755 94 45.00 4832.97 194.20 4855.12 95.59 5005.82 180.10 2.755 95 45.00 4832.97 194.73 4855.12 95.94 5005.72 180.10 2.756 96 46.05 4832.96 201.04 4855.36 100.34 5004.68 180.10 2.756 97 46.58 4832.95 202.10 4855.46 101.12 5004.59 180.10 2.756 98 45.00 4832.97 195.26 4855.13 96.30 5005.61 180.10 2.757 99 47.63 4832.93 201.57 4855.41 101.95 4999.29 175.00 2.757 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4832.97 XR: 199.47 YR: 4855.21 Centre: XC: 99.91 YC: 4999.13 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4832.97 53.15 4830.50 61.40 4828.42 69.75 4826.75 78.17 4825.49 86.64 4824.64 95.14 4824.20 103.65 4824.17 112.15 4824.56 120.63 4825.36 129.05 4826.57 137.41 4828.20 145.68 4830.22 153.84 4832.65 161.87 4835.47 169.76 4838.67 177.48 4842.26 185.01 4846.22 192.35 4850.54 199.47 4855.21 Slice Geometry and Properties - Critical Failure Surface (circle 1, 40 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 3.62 -16.9 5.00 5.23 1 50.00 25.0 416.65 236.27 91.40 1.10 2 50.00 7.71 -16.9 3.15 3.29 1 50.00 25.0 887.19 398.72 296.96 1.10 3 53.15 19.22 -14.1 4.13 4.26 1 50.00 25.0 2214.81 791.47 557.38 1.08 4 57.27 29.18 -14.1 4.13 4.26 1 50.00 25.0 3363.04 1079.21 845.11 1.08 5 61.40 39.17 -11.3 4.17 4.26 1 50.00 25.0 4516.13 1340.03 1113.50 1.06 6 65.57 48.46 -11.3 4.17 4.26 1 50.00 25.0 5587.28 1574.11 1377.40 1.06 7 69.75 57.83 -8.5 4.21 4.26 1 50.00 25.0 6668.83 1781.21 1618.30 1.04 8 73.96 66.38 -8.5 4.21 4.26 1 50.00 25.0 7655.83 1961.08 1857.91 1.04 9 78.17 74.98 -5.7 4.23 4.26 1 50.00 25.0 8648.05 2113.84 2071.36 1.02 10 82.40 82.75 -5.7 4.23 4.26 1 50.00 25.0 9545.78 2239.53 2286.62 1.02 11 86.64 90.44 -3.0 4.25 4.26 1 50.00 25.0 10432.69 2337.53 2472.54 1.01 12 90.89 97.38 -3.0 4.25 4.26 1 50.00 25.0 11234.93 2408.22 2662.87 1.01 13 95.14 104.03 -0.2 4.26 4.26 1 50.00 25.0 12003.54 2451.56 2821.40 1.00 14 99.39 110.11 -0.2 4.26 4.26 1 50.00 25.0 12706.65 2467.38 2986.68 1.00 15 103.65 101.32 2.6 3.74 3.74 1 50.00 25.0 11692.63 2159.59 3109.13 0.99 16 107.39 135.14 2.6 4.77 4.77 1 50.00 25.0 15540.99 2712.56 3237.39 0.99 17 112.15 152.53 5.4 5.15 5.17 1 50.00 25.0 17418.38 2841.51 3337.36 0.99 18 117.30 100.18 5.4 3.33 3.34 1 50.00 25.0 11401.40 1764.06 3376.73 0.99 19 120.63 124.85 8.2 4.21 4.26 1 50.00 25.0 14209.78 2134.45 3300.51 0.99 20 124.84 122.29 8.2 4.21 4.26 1 50.00 25.0 13919.49 1985.71 3232.43 0.99 21 129.05 118.33 11.0 4.18 4.26 1 50.00 25.0 13468.77 1809.74 3128.98 0.99 22 133.23 114.95 11.0 4.18 4.26 1 50.00 25.0 13082.68 1606.66 3038.03 0.99 23 137.41 90.45 13.8 3.39 3.49 1 50.00 25.0 10293.33 1147.60 2922.79 0.99 24 140.80 71.40 13.8 2.75 2.83 1 50.00 25.0 7535.16 2506.57 2657.35 0.99 25 143.55 53.87 13.8 2.13 2.19 1 50.00 25.0 6798.08 3406.90 3125.96 0.99 26 145.68 99.78 16.6 4.08 4.26 1 50.00 25.0 12631.04 6393.30 3012.67 0.99 27 149.76 94.77 16.6 4.08 4.26 1 50.00 25.0 12054.25 6071.52 2874.47 0.99 28 153.84 87.95 19.3 4.02 4.26 2 10.00 35.0 11216.66 5723.18 2670.61 0.97 29 157.86 82.23 19.3 4.02 4.26 2 10.00 35.0 10474.26 5348.80 2493.85 0.97 30 161.87 74.72 22.1 3.94 4.26 2 10.00 35.0 9504.46 4948.73 2289.85 0.98 31 165.81 68.33 22.1 3.94 4.26 2 10.00 35.0 8676.17 4522.82 2090.31 0.98 32 169.76 60.29 24.9 3.86 4.26 2 10.00 35.0 7636.13 4071.64 1866.54 0.98 33 173.62 53.31 24.9 3.86 4.26 2 10.00 35.0 6730.35 3595.45 1645.13 0.98 34 177.48 44.87 27.7 3.77 4.26 2 10.00 35.0 5640.77 3094.56 1402.68 0.99 35 181.25 37.36 27.7 3.77 4.26 2 10.00 35.0 4665.39 2569.10 1160.09 0.99 36 185.01 28.72 30.5 3.67 4.26 2 10.00 35.0 3548.75 2019.45 900.18 1.01 37 188.68 20.74 30.5 3.67 4.26 2 10.00 35.0 2513.70 1445.98 637.56 1.01 38 192.35 3.65 33.3 0.85 1.02 2 10.00 35.0 432.00 259.43 468.80 1.02 39 193.20 4.92 33.3 1.38 1.65 2 10.00 35.0 570.80 345.43 381.67 1.02 40 194.58 7.61 33.3 4.89 5.84 1 50.00 25.0 856.21 472.73 154.68 1.07 X-S Area: 2785.83 Path Length: 161.74 X-S Weight: 328393.03 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NW3-Mining-EQ.gmf Processed: 22 Jan 2026 09:23:37 DATA: Analysis 1 - Slope Stability - Case NW-3 - Mining Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4857.00 243.20 4857.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 140.80 4855.30 143.80 4855.30 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4852.00 140.80 4852.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 143.80 4852.00 243.20 4852.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4833.60 50.00 4832.90 140.80 4832.70 Profile: 6 (2 points) Material beneath: 1 - Clay 143.80 4832.70 243.20 4833.20 Profile: 7 (2 points) Material beneath: 1 - Clay 140.80 4829.70 143.80 4829.70 Slope Surface (11 points) 0.00 4833.60 50.00 4832.90 117.30 4855.30 140.80 4855.30 143.80 4855.30 193.20 4855.10 199.40 4855.20 213.70 4856.60 227.80 4856.40 237.60 4854.00 243.20 4854.00 Phreatic Surface (5 points) 0.00 4833.60 50.00 4832.90 140.80 4833.90 143.80 4854.90 243.20 4854.90 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4832.90 XR: 198.15 YR: 4855.18 Centre: XC: 80.87 YC: 5131.31 Radius: R: 300.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-3 - Mining Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.407 Analysis Summary There were: 19966 successful analyses from a total of 20001 trial failure surfaces 35 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.81 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4832.97 203.15 4855.57 102.05 4998.41 175.00 1.809 <-- Critical Surface 2 45.00 4832.97 202.62 4855.52 101.75 4998.51 175.00 1.809 3 45.00 4832.97 202.10 4855.46 101.44 4998.62 175.00 1.809 4 45.00 4832.97 201.57 4855.41 101.14 4998.72 175.00 1.810 5 45.00 4832.97 201.04 4855.36 100.83 4998.83 175.00 1.810 6 45.00 4832.97 200.52 4855.31 100.52 4998.93 175.00 1.810 7 45.00 4832.97 199.47 4855.21 99.91 4999.13 175.00 1.812 8 45.00 4832.97 199.99 4855.26 100.22 4999.03 175.00 1.813 9 45.53 4832.96 203.15 4855.57 102.22 4998.53 175.00 1.815 10 45.53 4832.96 202.62 4855.52 101.91 4998.63 175.00 1.815 11 45.53 4832.96 202.10 4855.46 101.60 4998.73 175.00 1.815 12 45.53 4832.96 201.57 4855.41 101.30 4998.84 175.00 1.816 13 45.53 4832.96 201.04 4855.36 100.99 4998.94 175.00 1.816 14 45.53 4832.96 199.47 4855.21 100.08 4999.24 175.00 1.816 15 45.53 4832.96 199.99 4855.26 100.38 4999.14 175.00 1.818 16 45.53 4832.96 200.52 4855.31 100.69 4999.04 175.00 1.818 17 46.05 4832.96 203.15 4855.57 102.38 4998.64 175.00 1.821 18 45.00 4832.97 202.10 4855.46 100.63 5004.26 180.10 1.821 19 46.05 4832.96 202.62 4855.52 102.07 4998.75 175.00 1.821 20 46.05 4832.96 202.10 4855.46 101.77 4998.85 175.00 1.822 21 45.00 4832.97 198.94 4855.19 99.57 4999.24 175.00 1.822 22 45.00 4832.97 202.62 4855.52 100.94 5004.17 180.10 1.822 23 45.00 4832.97 201.04 4855.36 100.02 5004.46 180.10 1.822 24 45.00 4832.97 201.57 4855.41 100.33 5004.36 180.10 1.822 25 45.00 4832.97 203.15 4855.57 101.24 5004.06 180.10 1.822 26 46.05 4832.96 199.99 4855.26 100.54 4999.25 175.00 1.823 27 46.05 4832.96 200.52 4855.31 100.85 4999.15 175.00 1.823 28 46.05 4832.96 201.04 4855.36 101.16 4999.05 175.00 1.824 29 46.05 4832.96 201.57 4855.41 101.46 4998.95 175.00 1.824 30 45.53 4832.96 203.15 4855.57 101.41 5004.18 180.10 1.827 31 45.53 4832.96 202.62 4855.52 101.10 5004.28 180.10 1.827 32 45.53 4832.96 202.10 4855.46 100.79 5004.38 180.10 1.827 33 46.58 4832.95 202.62 4855.52 102.24 4998.86 175.00 1.827 34 46.58 4832.95 203.15 4855.57 102.54 4998.76 175.00 1.828 35 45.53 4832.96 201.57 4855.41 100.49 5004.47 180.10 1.828 36 46.58 4832.95 201.04 4855.36 101.32 4999.17 175.00 1.829 37 46.58 4832.95 200.52 4855.31 101.01 4999.27 175.00 1.829 38 46.58 4832.95 199.99 4855.26 100.71 4999.37 175.00 1.829 39 46.58 4832.95 201.57 4855.41 101.63 4999.06 175.00 1.829 40 46.58 4832.95 202.10 4855.46 101.93 4998.96 175.00 1.830 41 45.53 4832.96 198.94 4855.19 99.73 4999.36 175.00 1.831 42 46.05 4832.96 199.47 4855.21 100.24 4999.35 175.00 1.831 43 45.00 4832.97 198.41 4855.18 99.22 4999.36 175.00 1.832 44 46.05 4832.96 203.15 4855.57 101.57 5004.29 180.10 1.833 45 45.00 4832.97 202.62 4855.52 100.13 5009.78 185.20 1.833 46 45.00 4832.97 203.15 4855.57 100.44 5009.68 185.20 1.833 47 46.05 4832.96 202.62 4855.52 101.26 5004.39 180.10 1.833 48 47.11 4832.94 203.15 4855.57 102.71 4998.87 175.00 1.834 49 46.05 4832.96 202.10 4855.46 100.96 5004.48 180.10 1.834 50 46.05 4832.96 201.57 4855.41 100.65 5004.58 180.10 1.834 51 45.00 4832.97 200.52 4855.31 99.72 5004.56 180.10 1.834 52 47.11 4832.94 201.57 4855.41 101.79 4999.18 175.00 1.834 53 47.11 4832.94 202.10 4855.46 102.09 4999.08 175.00 1.835 54 47.11 4832.94 201.04 4855.36 101.48 4999.28 175.00 1.835 55 45.53 4832.96 201.04 4855.36 100.18 5004.57 180.10 1.835 56 47.11 4832.94 200.52 4855.31 101.17 4999.38 175.00 1.836 57 47.11 4832.94 202.62 4855.52 102.40 4998.97 175.00 1.836 58 45.53 4832.96 203.15 4855.57 100.60 5009.79 185.20 1.839 59 46.58 4832.95 202.62 4855.52 101.42 5004.50 180.10 1.840 60 46.58 4832.95 203.15 4855.57 101.73 5004.40 180.10 1.840 61 46.58 4832.95 201.57 4855.41 100.81 5004.69 180.10 1.840 62 46.58 4832.95 202.10 4855.46 101.12 5004.59 180.10 1.840 63 47.63 4832.93 202.10 4855.46 102.26 4999.19 175.00 1.841 64 47.63 4832.93 202.62 4855.52 102.56 4999.09 175.00 1.841 65 47.63 4832.93 201.57 4855.41 101.95 4999.29 175.00 1.841 66 46.58 4832.95 199.47 4855.21 100.40 4999.47 175.00 1.841 67 47.63 4832.93 203.15 4855.57 102.87 4998.99 175.00 1.841 68 46.05 4832.96 198.94 4855.19 99.89 4999.47 175.00 1.841 69 47.63 4832.93 201.04 4855.36 101.64 4999.39 175.00 1.842 70 47.63 4832.93 200.52 4855.31 101.34 4999.49 175.00 1.842 71 45.53 4832.96 198.41 4855.18 99.38 4999.47 175.00 1.842 72 47.11 4832.94 199.99 4855.26 100.87 4999.48 175.00 1.843 73 45.00 4832.97 199.99 4855.26 99.41 5004.66 180.10 1.844 74 45.53 4832.96 200.52 4855.31 99.88 5004.67 180.10 1.844 75 46.05 4832.96 201.04 4855.36 100.34 5004.68 180.10 1.845 76 46.05 4832.96 203.15 4855.57 100.76 5009.89 185.20 1.845 77 47.11 4832.94 203.15 4855.57 101.89 5004.51 180.10 1.846 78 47.11 4832.94 202.62 4855.52 101.58 5004.61 180.10 1.846 79 48.16 4832.93 203.15 4855.57 103.03 4999.10 175.00 1.846 80 47.11 4832.94 202.10 4855.46 101.28 5004.70 180.10 1.847 81 48.16 4832.93 202.62 4855.52 102.73 4999.20 175.00 1.847 82 45.00 4832.97 202.10 4855.46 99.83 5009.87 185.20 1.847 83 45.00 4832.97 195.78 4855.14 97.47 4999.92 175.00 1.848 84 48.16 4832.93 201.57 4855.41 102.11 4999.40 175.00 1.848 85 48.16 4832.93 202.10 4855.46 102.42 4999.30 175.00 1.848 86 48.16 4832.93 200.52 4855.31 101.50 4999.60 175.00 1.848 87 45.53 4832.96 202.62 4855.52 100.29 5009.88 185.20 1.848 88 48.16 4832.93 201.04 4855.36 101.80 4999.50 175.00 1.848 89 45.00 4832.97 197.89 4855.18 98.87 4999.47 175.00 1.850 90 45.00 4832.97 197.36 4855.17 98.52 4999.58 175.00 1.850 91 45.00 4832.97 196.31 4855.15 97.82 4999.81 175.00 1.851 92 47.11 4832.94 199.47 4855.21 100.56 4999.58 175.00 1.851 93 46.58 4832.95 198.94 4855.19 100.05 4999.58 175.00 1.851 94 45.00 4832.97 196.83 4855.16 98.17 4999.70 175.00 1.851 95 47.63 4832.93 203.15 4855.57 102.05 5004.62 180.10 1.852 96 47.63 4832.93 199.99 4855.26 101.03 4999.59 175.00 1.852 97 47.63 4832.93 202.10 4855.46 101.44 5004.81 180.10 1.853 98 48.68 4832.92 203.15 4855.57 103.19 4999.21 175.00 1.853 99 48.68 4832.92 202.62 4855.52 102.89 4999.31 175.00 1.853 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4832.97 XR: 203.15 YR: 4855.57 Centre: XC: 102.05 YC: 4998.41 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4832.97 53.32 4830.33 61.77 4828.11 70.31 4826.31 78.93 4824.94 87.61 4824.01 96.33 4823.50 105.06 4823.44 113.78 4823.80 122.48 4824.60 131.12 4825.84 139.69 4827.50 148.17 4829.59 156.53 4832.10 164.75 4835.03 172.82 4838.36 180.72 4842.09 188.42 4846.21 195.90 4850.70 203.15 4855.57 Slice Geometry and Properties - Critical Failure Surface (circle 1, 43 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 3.79 -17.6 5.00 5.25 1 50.00 25.0 436.02 248.21 100.31 1.14 2 50.00 8.62 -17.6 3.32 3.49 1 50.00 25.0 992.72 448.23 323.53 1.14 3 53.32 20.83 -14.7 4.22 4.37 1 50.00 25.0 2399.56 867.59 603.07 1.11 4 57.54 31.45 -14.7 4.22 4.37 1 50.00 25.0 3624.65 1182.85 909.14 1.11 5 61.77 42.15 -11.9 4.27 4.37 1 50.00 25.0 4859.13 1469.17 1189.55 1.08 6 66.04 52.06 -11.9 4.27 4.37 1 50.00 25.0 6002.59 1726.66 1469.20 1.08 7 70.31 62.11 -9.0 4.31 4.37 1 50.00 25.0 7162.28 1955.19 1717.65 1.06 8 74.62 71.25 -9.0 4.31 4.37 1 50.00 25.0 8216.93 2154.57 1970.76 1.06 9 78.93 80.48 -6.2 4.34 4.37 1 50.00 25.0 9282.04 2324.70 2187.73 1.03 10 83.27 88.78 -6.2 4.34 4.37 1 50.00 25.0 10240.38 2465.12 2413.89 1.03 11 87.61 97.03 -3.3 4.36 4.37 1 50.00 25.0 11192.56 2576.31 2599.74 1.02 12 91.97 104.44 -3.3 4.36 4.37 1 50.00 25.0 12048.95 2657.84 2798.93 1.02 13 96.33 111.58 -0.4 4.37 4.37 1 50.00 25.0 12873.11 2709.88 2953.95 1.00 14 100.69 118.07 -0.4 4.37 4.37 1 50.00 25.0 13623.23 2732.22 3126.05 1.00 15 105.06 65.46 2.4 2.33 2.33 1 50.00 25.0 7554.15 1458.60 3216.63 0.99 16 107.39 92.52 2.4 3.20 3.20 1 50.00 25.0 10651.40 1986.96 3300.56 0.99 17 110.58 95.49 2.4 3.20 3.20 1 50.00 25.0 10944.24 1967.16 3391.10 0.99 18 113.78 108.19 5.3 3.52 3.53 1 50.00 25.0 12344.83 2129.24 3438.44 0.98 19 117.30 160.08 5.3 5.18 5.20 1 50.00 25.0 18225.13 3017.00 3450.88 0.98 20 122.48 131.31 8.1 4.32 4.37 1 50.00 25.0 14950.71 2399.19 3352.42 0.97 21 126.80 128.64 8.1 4.32 4.37 1 50.00 25.0 14647.74 2244.10 3283.53 0.97 22 131.12 124.46 11.0 4.29 4.37 1 50.00 25.0 14171.27 2059.48 3166.65 0.97 23 135.40 120.89 11.0 4.29 4.37 1 50.00 25.0 13764.61 1845.56 3074.02 0.97 24 139.69 30.74 13.8 1.11 1.14 1 50.00 25.0 3500.31 446.58 2977.79 0.97 25 140.80 81.45 13.8 3.00 3.09 1 50.00 25.0 8656.23 3133.28 2767.22 0.97 26 143.80 114.52 13.8 4.37 4.50 1 50.00 25.0 14407.36 7250.37 3193.20 0.97 27 148.17 104.74 16.7 4.18 4.37 1 50.00 25.0 13230.52 6722.44 3039.99 0.97 28 152.35 99.42 16.7 4.18 4.37 1 50.00 25.0 12618.45 6380.27 2898.53 0.97 29 156.53 42.94 19.6 1.88 2.00 1 50.00 25.0 5471.39 2800.74 2770.62 0.97 30 158.41 69.45 19.6 3.17 3.37 2 10.00 35.0 8859.07 4529.03 2616.31 0.93 31 161.58 65.84 19.6 3.17 3.37 2 10.00 35.0 8390.16 4292.43 2477.78 0.93 32 164.75 78.07 22.4 4.04 4.37 2 10.00 35.0 9935.88 5186.07 2284.81 0.93 33 168.79 71.28 22.4 4.04 4.37 2 10.00 35.0 9055.49 4732.60 2082.33 0.93 34 172.82 62.69 25.3 3.95 4.37 2 10.00 35.0 7945.93 4251.90 1850.23 0.93 35 176.77 55.27 25.3 3.95 4.37 2 10.00 35.0 6982.88 3743.75 1626.01 0.93 36 180.72 46.29 28.1 3.85 4.37 2 10.00 35.0 5821.75 3209.44 1376.66 0.94 37 184.57 38.30 28.1 3.85 4.37 2 10.00 35.0 4785.83 2648.70 1131.67 0.94 38 188.42 35.72 31.0 4.78 5.58 2 10.00 35.0 4404.77 2526.87 829.86 0.95 39 193.20 14.12 31.0 2.70 3.15 2 10.00 35.0 1700.66 984.53 567.23 0.95 40 195.90 7.36 33.9 1.93 2.33 2 10.00 35.0 857.87 515.53 394.93 0.96 41 197.83 4.17 33.9 1.57 1.89 1 50.00 25.0 472.74 279.46 263.36 1.03 42 199.40 3.75 33.9 2.76 3.32 1 50.00 25.0 412.75 191.39 120.40 1.03 43 202.16 0.28 33.9 0.99 1.20 1 50.00 25.0 28.32 0.00 8.45 1.03 X-S Area: 2946.11 Path Length: 165.88 X-S Weight: 347746.66 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NW4-Mining.gmf Processed: 22 Jan 2026 09:24:09 DATA: Analysis 1 - Slope Stability - Case NW-4 - Mining Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4860.00 332.70 4860.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 131.20 4857.20 134.20 4857.20 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4853.00 131.20 4853.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 134.20 4853.00 332.70 4853.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4837.40 50.00 4837.80 131.20 4838.20 Profile: 6 (2 points) Material beneath: 1 - Clay 134.20 4838.20 332.70 4838.70 Profile: 7 (2 points) Material beneath: 1 - Clay 131.20 4835.20 134.20 4835.20 Slope Surface (9 points) 0.00 4837.40 50.00 4837.80 107.70 4857.10 131.20 4857.20 134.20 4857.20 226.20 4857.70 234.20 4859.00 282.70 4859.50 332.70 4859.50 Phreatic Surface (5 points) 0.00 4837.40 50.00 4837.80 131.20 4839.20 134.20 4856.00 332.70 4856.00 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4837.80 XR: 287.70 YR: 4859.50 Centre: XC: 106.14 YC: 5535.54 Radius: R: 700.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 400.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-4 - Mining Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 5.277 Analysis Summary There were: 20001 successful analyses from a total of 20001 trial failure surfaces Critical (minimum) Factor of Safety: 4.63 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4837.76 282.70 4859.50 119.63 5332.16 500.00 4.633 <-- Critical Surface 2 45.00 4837.76 283.23 4859.50 119.99 5332.10 500.00 4.639 3 45.00 4837.76 283.75 4859.50 120.36 5332.05 500.00 4.644 4 45.53 4837.76 282.70 4859.50 119.79 5332.22 500.00 4.648 5 45.00 4837.76 282.70 4859.50 118.86 5340.53 508.16 4.649 6 45.00 4837.76 284.28 4859.50 120.72 5331.99 500.00 4.650 7 45.53 4837.76 283.23 4859.50 120.16 5332.16 500.00 4.654 8 45.00 4837.76 284.81 4859.50 121.09 5331.94 500.00 4.655 9 45.00 4837.76 283.23 4859.50 119.23 5340.47 508.16 4.658 10 45.53 4837.76 283.75 4859.50 120.53 5332.11 500.00 4.659 11 45.00 4837.76 285.33 4859.50 121.45 5331.88 500.00 4.662 12 45.53 4837.76 282.70 4859.50 119.03 5340.58 508.16 4.664 13 45.00 4837.76 284.28 4859.50 119.96 5340.36 508.16 4.665 14 45.53 4837.76 284.28 4859.50 120.89 5332.05 500.00 4.665 15 45.00 4837.76 283.75 4859.50 119.60 5340.42 508.16 4.666 16 45.00 4837.76 282.70 4859.50 118.10 5348.89 516.33 4.666 17 45.00 4837.76 285.86 4859.50 121.82 5331.82 500.00 4.668 18 46.05 4837.77 282.70 4859.50 119.96 5332.28 500.00 4.668 19 46.05 4837.77 283.23 4859.50 120.33 5332.22 500.00 4.669 20 45.53 4837.76 283.23 4859.50 119.40 5340.53 508.16 4.670 21 45.00 4837.76 283.23 4859.50 118.47 5348.83 516.33 4.671 22 45.00 4837.76 284.81 4859.50 120.33 5340.31 508.16 4.671 23 45.53 4837.76 284.81 4859.50 121.26 5332.00 500.00 4.672 24 45.00 4837.76 286.38 4859.50 122.18 5331.77 500.00 4.674 25 46.05 4837.77 283.75 4859.50 120.70 5332.17 500.00 4.675 26 45.00 4837.76 283.75 4859.50 118.83 5348.78 516.33 4.676 27 45.00 4837.76 285.33 4859.50 120.69 5340.25 508.16 4.677 28 45.53 4837.76 285.33 4859.50 121.62 5331.94 500.00 4.677 29 45.53 4837.76 283.75 4859.50 119.76 5340.48 508.16 4.678 30 46.05 4837.77 282.70 4859.50 119.19 5340.64 508.16 4.679 31 45.00 4837.76 286.91 4859.50 122.54 5331.71 500.00 4.680 32 45.00 4837.76 284.28 4859.50 119.20 5348.73 516.33 4.681 33 46.58 4837.77 282.70 4859.50 120.13 5332.33 500.00 4.681 34 46.05 4837.77 284.28 4859.50 121.06 5332.11 500.00 4.681 35 45.53 4837.76 282.70 4859.50 118.26 5348.94 516.33 4.681 36 45.00 4837.76 282.70 4859.50 117.33 5357.24 524.49 4.683 37 45.00 4837.76 285.86 4859.50 121.06 5340.20 508.16 4.683 38 45.53 4837.76 285.86 4859.50 121.99 5331.88 500.00 4.684 39 46.05 4837.77 283.23 4859.50 119.56 5340.59 508.16 4.684 40 45.00 4837.76 287.44 4859.50 122.90 5331.65 500.00 4.686 41 45.53 4837.76 283.23 4859.50 118.63 5348.89 516.33 4.686 42 45.53 4837.76 284.28 4859.50 120.13 5340.42 508.16 4.687 43 45.53 4837.76 284.81 4859.50 120.50 5340.37 508.16 4.687 44 46.05 4837.77 284.81 4859.50 121.43 5332.05 500.00 4.687 45 45.00 4837.76 283.23 4859.50 117.70 5357.19 524.49 4.688 46 45.00 4837.76 284.81 4859.50 119.57 5348.67 516.33 4.688 47 45.00 4837.76 286.38 4859.50 121.42 5340.14 508.16 4.689 48 45.53 4837.76 286.38 4859.50 122.35 5331.83 500.00 4.690 49 46.58 4837.77 283.23 4859.50 120.50 5332.28 500.00 4.690 50 46.05 4837.77 283.75 4859.50 119.93 5340.53 508.16 4.690 51 46.58 4837.77 283.75 4859.50 120.86 5332.22 500.00 4.691 52 45.53 4837.76 283.75 4859.50 119.00 5348.84 516.33 4.691 53 45.00 4837.76 287.96 4859.50 123.27 5331.60 500.00 4.692 54 45.53 4837.76 285.33 4859.50 120.86 5340.31 508.16 4.693 55 45.00 4837.76 283.75 4859.50 118.07 5357.13 524.49 4.693 56 46.05 4837.77 285.33 4859.50 121.79 5332.00 500.00 4.694 57 47.11 4837.78 282.70 4859.50 120.30 5332.39 500.00 4.695 58 46.58 4837.77 282.70 4859.50 119.36 5340.70 508.16 4.695 59 45.00 4837.76 286.91 4859.50 121.79 5340.09 508.16 4.695 60 45.53 4837.76 286.91 4859.50 122.71 5331.77 500.00 4.696 61 46.05 4837.77 282.70 4859.50 118.43 5349.00 516.33 4.696 62 45.53 4837.76 284.28 4859.50 119.37 5348.78 516.33 4.697 63 45.00 4837.76 285.33 4859.50 119.94 5348.62 516.33 4.697 64 46.58 4837.77 284.28 4859.50 121.23 5332.17 500.00 4.697 65 45.00 4837.76 284.28 4859.50 118.44 5357.08 524.49 4.698 66 45.00 4837.76 288.49 4859.50 123.63 5331.54 500.00 4.698 67 45.53 4837.76 282.70 4859.50 117.50 5357.29 524.49 4.698 68 45.53 4837.76 285.86 4859.50 121.23 5340.26 508.16 4.699 69 45.00 4837.76 282.70 4859.50 116.57 5365.58 532.65 4.699 70 46.05 4837.77 284.28 4859.50 120.30 5340.48 508.16 4.700 71 46.05 4837.77 285.86 4859.50 122.16 5331.94 500.00 4.700 72 46.58 4837.77 283.23 4859.50 119.73 5340.64 508.16 4.701 73 46.05 4837.77 283.23 4859.50 118.80 5348.94 516.33 4.701 74 45.00 4837.76 287.44 4859.50 122.15 5340.03 508.16 4.701 75 45.53 4837.76 287.44 4859.50 123.08 5331.71 500.00 4.702 76 45.53 4837.76 284.81 4859.50 119.74 5348.73 516.33 4.702 77 45.53 4837.76 283.23 4859.50 117.87 5357.24 524.49 4.703 78 45.00 4837.76 284.81 4859.50 118.81 5357.03 524.49 4.703 79 47.11 4837.78 283.23 4859.50 120.67 5332.34 500.00 4.703 80 46.58 4837.77 284.81 4859.50 121.60 5332.11 500.00 4.704 81 45.00 4837.76 289.02 4859.50 123.99 5331.48 500.00 4.704 82 45.00 4837.76 286.38 4859.50 120.67 5348.51 516.33 4.705 83 45.00 4837.76 283.23 4859.50 116.94 5365.53 532.65 4.705 84 45.53 4837.76 286.38 4859.50 121.59 5340.20 508.16 4.705 85 45.00 4837.76 285.86 4859.50 120.30 5348.57 516.33 4.706 86 46.05 4837.77 286.38 4859.50 122.52 5331.89 500.00 4.706 87 46.58 4837.77 283.75 4859.50 120.10 5340.59 508.16 4.706 88 46.05 4837.77 283.75 4859.50 119.17 5348.89 516.33 4.707 89 45.00 4837.76 287.96 4859.50 122.52 5339.98 508.16 4.707 90 45.53 4837.76 283.75 4859.50 118.24 5357.19 524.49 4.708 91 45.53 4837.76 287.96 4859.50 123.44 5331.66 500.00 4.708 92 46.05 4837.77 284.81 4859.50 120.66 5340.42 508.16 4.708 93 45.00 4837.76 285.33 4859.50 119.18 5356.98 524.49 4.708 94 46.05 4837.77 285.33 4859.50 121.03 5340.37 508.16 4.709 95 45.53 4837.76 285.33 4859.50 120.11 5348.68 516.33 4.709 96 45.00 4837.76 283.75 4859.50 117.31 5365.48 532.65 4.710 97 46.58 4837.77 285.33 4859.50 121.96 5332.06 500.00 4.710 98 45.00 4837.76 289.54 4859.50 124.35 5331.42 500.00 4.710 99 45.00 4837.76 286.91 4859.50 121.04 5348.46 516.33 4.711 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4837.76 XR: 282.70 YR: 4859.50 Centre: XC: 119.63 YC: 5332.16 Radius: R: 500.00 Generated failure surface: (20 points) 45.00 4837.76 57.57 4836.03 70.17 4834.61 82.81 4833.52 95.47 4832.74 108.15 4832.29 120.83 4832.16 133.51 4832.35 146.19 4832.87 158.85 4833.70 171.48 4834.86 184.08 4836.33 196.64 4838.12 209.14 4840.24 221.59 4842.67 233.98 4845.41 246.29 4848.47 258.52 4851.84 270.66 4855.52 282.70 4859.50 Slice Geometry and Properties - Critical Failure Surface (circle 1, 42 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.83 -7.9 5.00 5.05 1 50.00 25.0 210.01 115.03 43.78 1.02 2 50.00 19.05 -7.9 7.57 7.64 1 50.00 25.0 2195.76 628.09 294.66 1.02 3 57.57 36.01 -6.4 6.30 6.34 1 50.00 25.0 4153.29 915.40 666.07 1.02 4 63.87 53.76 -6.4 6.30 6.34 1 50.00 25.0 6201.67 1238.30 994.19 1.02 5 70.17 71.19 -4.9 6.32 6.34 1 50.00 25.0 8214.26 1529.55 1310.21 1.01 6 76.49 88.00 -5.0 6.32 6.34 1 50.00 25.0 10155.07 1789.28 1619.71 1.01 7 82.81 104.27 -3.5 6.32 6.33 1 50.00 25.0 12032.68 2012.44 1915.41 1.01 8 89.13 120.05 -3.5 6.32 6.33 1 50.00 25.0 13854.94 2207.76 2205.49 1.01 9 95.44 131.10 -2.1 6.13 6.13 1 50.00 25.0 15036.72 2296.66 2461.37 1.00 10 101.57 145.00 -2.0 6.13 6.13 1 50.00 25.0 16454.07 2420.72 2693.33 1.00 11 107.70 163.18 -0.7 6.57 6.57 1 50.00 25.0 18433.88 2700.07 2810.62 1.00 12 114.27 163.80 -0.6 6.57 6.57 1 50.00 25.0 18511.07 2774.04 2821.93 1.00 13 120.83 129.44 0.9 5.18 5.18 1 50.00 25.0 14631.48 2221.46 2818.50 1.00 14 126.02 129.15 0.9 5.18 5.18 1 50.00 25.0 14601.23 2225.09 2812.68 1.00 15 131.20 57.56 0.9 2.31 2.32 1 50.00 25.0 6098.55 1928.36 2631.46 1.00 16 133.51 156.74 2.3 6.34 6.34 1 50.00 25.0 19315.88 9308.16 3041.18 1.00 17 139.85 155.33 2.3 6.34 6.34 1 50.00 25.0 19149.19 9206.74 3014.91 1.00 18 146.19 153.21 3.8 6.33 6.34 1 50.00 25.0 18898.94 9073.52 2975.26 1.00 19 152.52 150.79 3.8 6.33 6.34 1 50.00 25.0 18615.20 8908.33 2930.53 1.00 20 158.85 147.56 5.2 6.32 6.34 1 50.00 25.0 18236.83 8711.39 2872.56 1.00 21 165.16 144.13 5.2 6.32 6.34 1 50.00 25.0 17837.63 8482.84 2809.59 1.00 22 171.48 139.82 6.7 6.30 6.34 1 50.00 25.0 17333.78 8222.28 2733.50 1.00 23 177.78 135.39 6.7 6.30 6.34 1 50.00 25.0 16819.31 7930.36 2652.23 1.00 24 184.08 130.03 8.1 6.28 6.34 1 50.00 25.0 16193.98 7607.02 2558.11 1.00 25 190.36 124.61 8.1 6.28 6.34 1 50.00 25.0 15566.27 7251.94 2458.77 1.00 26 196.64 26.96 9.6 1.40 1.42 1 50.00 25.0 3375.17 1569.84 2392.34 1.00 27 198.03 104.06 9.6 5.56 5.63 2 10.00 35.0 13017.93 6036.41 2311.27 0.99 28 203.59 99.02 9.6 5.56 5.63 2 10.00 35.0 12356.94 5706.46 2193.80 0.99 29 209.14 104.45 11.0 6.23 6.34 2 10.00 35.0 12995.35 5997.78 2054.46 0.99 30 215.37 97.10 11.0 6.23 6.34 2 10.00 35.0 12033.59 5517.26 1902.21 0.99 31 221.59 66.85 12.5 4.61 4.72 2 10.00 35.0 8249.70 3775.64 1758.14 0.99 32 226.20 107.19 12.5 7.78 7.97 2 10.00 35.0 13041.06 5691.88 1645.15 0.99 33 233.98 79.12 13.9 6.16 6.34 2 10.00 35.0 9449.15 3888.15 1501.20 0.99 34 240.13 70.10 13.9 6.16 6.34 2 10.00 35.0 8265.22 3283.28 1312.38 0.99 35 246.29 60.20 15.4 6.11 6.34 2 10.00 35.0 6971.96 2647.32 1110.73 1.00 36 252.40 50.29 15.4 6.11 6.34 2 10.00 35.0 5671.76 1980.76 902.40 1.00 37 258.52 26.30 16.9 3.84 4.01 2 10.00 35.0 2869.20 896.16 724.08 1.00 38 262.36 23.59 16.9 4.15 4.34 1 50.00 25.0 2506.55 641.76 587.16 1.01 39 266.51 18.55 16.9 4.15 4.34 1 50.00 25.0 1924.17 301.44 448.70 1.01 40 270.66 5.31 18.3 1.47 1.54 1 50.00 25.0 536.64 23.37 351.46 1.02 41 272.12 13.45 18.3 5.29 5.57 1 50.00 25.0 1345.13 0.00 242.69 1.02 42 277.41 4.48 18.3 5.29 5.57 1 50.00 25.0 448.29 0.00 78.58 1.02 X-S Area: 3808.00 Path Length: 241.01 X-S Weight: 453809.44 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NW4-Mining-EQ.gmf Processed: 22 Jan 2026 09:24:38 DATA: Analysis 1 - Slope Stability - Case NW-4 - Mining Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4860.00 332.70 4860.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 131.20 4857.20 134.20 4857.20 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4853.00 131.20 4853.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 134.20 4853.00 332.70 4853.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4837.40 50.00 4837.80 131.20 4838.20 Profile: 6 (2 points) Material beneath: 1 - Clay 134.20 4838.20 332.70 4838.70 Profile: 7 (2 points) Material beneath: 1 - Clay 131.20 4835.20 134.20 4835.20 Slope Surface (9 points) 0.00 4837.40 50.00 4837.80 107.70 4857.10 131.20 4857.20 134.20 4857.20 226.20 4857.70 234.20 4859.00 282.70 4859.50 332.70 4859.50 Phreatic Surface (5 points) 0.00 4837.40 50.00 4837.80 131.20 4839.20 134.20 4856.00 332.70 4856.00 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4837.80 XR: 287.70 YR: 4859.50 Centre: XC: 106.14 YC: 5535.54 Radius: R: 700.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 400.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-4 - Mining Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.699 Analysis Summary There were: 20001 successful analyses from a total of 20001 trial failure surfaces Critical (minimum) Factor of Safety: 2.40 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4837.76 284.81 4859.50 121.09 5331.94 500.00 2.399 <-- Critical Surface 2 45.00 4837.76 285.33 4859.50 121.45 5331.88 500.00 2.399 3 45.00 4837.76 287.44 4859.50 122.90 5331.65 500.00 2.399 4 45.00 4837.76 285.86 4859.50 121.82 5331.82 500.00 2.399 5 45.00 4837.76 287.96 4859.50 123.27 5331.60 500.00 2.399 6 45.00 4837.76 286.38 4859.50 122.18 5331.77 500.00 2.399 7 45.00 4837.76 286.91 4859.50 122.54 5331.71 500.00 2.399 8 45.00 4837.76 284.28 4859.50 120.72 5331.99 500.00 2.399 9 45.00 4837.76 288.49 4859.50 123.63 5331.54 500.00 2.399 10 45.00 4837.76 289.02 4859.50 123.99 5331.48 500.00 2.399 11 45.00 4837.76 289.54 4859.50 124.35 5331.42 500.00 2.399 12 45.00 4837.76 283.75 4859.50 120.36 5332.05 500.00 2.400 13 45.00 4837.76 290.07 4859.50 124.71 5331.37 500.00 2.400 14 45.00 4837.76 282.70 4859.50 119.63 5332.16 500.00 2.400 15 45.00 4837.76 283.23 4859.50 119.99 5332.10 500.00 2.400 16 45.00 4837.76 290.59 4859.50 125.07 5331.31 500.00 2.400 17 45.00 4837.76 291.12 4859.50 125.43 5331.25 500.00 2.400 18 45.00 4837.76 291.65 4859.50 125.79 5331.19 500.00 2.400 19 45.00 4837.76 292.17 4859.50 126.15 5331.13 500.00 2.400 20 45.00 4837.76 292.70 4859.50 126.51 5331.07 500.00 2.400 21 45.53 4837.76 283.75 4859.50 120.53 5332.11 500.00 2.405 22 45.53 4837.76 285.33 4859.50 121.62 5331.94 500.00 2.405 23 45.53 4837.76 285.86 4859.50 121.99 5331.88 500.00 2.405 24 45.53 4837.76 284.28 4859.50 120.89 5332.05 500.00 2.405 25 45.53 4837.76 286.38 4859.50 122.35 5331.83 500.00 2.405 26 45.53 4837.76 284.81 4859.50 121.26 5332.00 500.00 2.405 27 45.53 4837.76 286.91 4859.50 122.71 5331.77 500.00 2.405 28 45.53 4837.76 287.44 4859.50 123.08 5331.71 500.00 2.405 29 45.53 4837.76 287.96 4859.50 123.44 5331.66 500.00 2.405 30 45.53 4837.76 288.49 4859.50 123.80 5331.60 500.00 2.405 31 45.53 4837.76 283.23 4859.50 120.16 5332.16 500.00 2.405 32 45.53 4837.76 289.02 4859.50 124.16 5331.54 500.00 2.405 33 45.53 4837.76 289.54 4859.50 124.52 5331.48 500.00 2.405 34 45.53 4837.76 282.70 4859.50 119.79 5332.22 500.00 2.405 35 45.53 4837.76 290.07 4859.50 124.88 5331.43 500.00 2.405 36 45.53 4837.76 290.59 4859.50 125.25 5331.37 500.00 2.405 37 45.53 4837.76 291.12 4859.50 125.61 5331.31 500.00 2.405 38 45.53 4837.76 291.65 4859.50 125.97 5331.25 500.00 2.405 39 45.53 4837.76 292.17 4859.50 126.32 5331.19 500.00 2.405 40 45.53 4837.76 292.70 4859.50 126.68 5331.13 500.00 2.406 41 45.00 4837.76 285.33 4859.50 120.69 5340.25 508.16 2.408 42 45.00 4837.76 287.96 4859.50 122.52 5339.98 508.16 2.408 43 45.00 4837.76 287.44 4859.50 122.15 5340.03 508.16 2.408 44 45.00 4837.76 285.86 4859.50 121.06 5340.20 508.16 2.408 45 45.00 4837.76 284.81 4859.50 120.33 5340.31 508.16 2.408 46 45.00 4837.76 286.38 4859.50 121.42 5340.14 508.16 2.408 47 45.00 4837.76 288.49 4859.50 122.88 5339.92 508.16 2.408 48 45.00 4837.76 289.54 4859.50 123.60 5339.81 508.16 2.408 49 45.00 4837.76 289.02 4859.50 123.24 5339.86 508.16 2.408 50 45.00 4837.76 286.91 4859.50 121.79 5340.09 508.16 2.408 51 45.00 4837.76 290.07 4859.50 123.97 5339.75 508.16 2.408 52 45.00 4837.76 284.28 4859.50 119.96 5340.36 508.16 2.408 53 45.00 4837.76 290.59 4859.50 124.33 5339.69 508.16 2.408 54 45.00 4837.76 291.12 4859.50 124.69 5339.64 508.16 2.408 55 45.00 4837.76 291.65 4859.50 125.05 5339.58 508.16 2.408 56 45.00 4837.76 292.17 4859.50 125.41 5339.52 508.16 2.408 57 45.00 4837.76 292.70 4859.50 125.77 5339.46 508.16 2.408 58 45.00 4837.76 282.70 4859.50 118.86 5340.53 508.16 2.409 59 45.00 4837.76 283.23 4859.50 119.23 5340.47 508.16 2.410 60 46.05 4837.77 283.75 4859.50 120.70 5332.17 500.00 2.410 61 46.05 4837.77 283.23 4859.50 120.33 5332.22 500.00 2.410 62 46.05 4837.77 284.28 4859.50 121.06 5332.11 500.00 2.410 63 46.05 4837.77 284.81 4859.50 121.43 5332.05 500.00 2.410 64 46.05 4837.77 285.33 4859.50 121.79 5332.00 500.00 2.410 65 46.05 4837.77 285.86 4859.50 122.16 5331.94 500.00 2.410 66 46.05 4837.77 286.38 4859.50 122.52 5331.89 500.00 2.410 67 46.05 4837.77 286.91 4859.50 122.88 5331.83 500.00 2.410 68 46.05 4837.77 287.44 4859.50 123.25 5331.77 500.00 2.410 69 46.05 4837.77 287.96 4859.50 123.61 5331.72 500.00 2.410 70 46.05 4837.77 288.49 4859.50 123.97 5331.66 500.00 2.410 71 46.05 4837.77 289.02 4859.50 124.33 5331.60 500.00 2.410 72 46.05 4837.77 289.54 4859.50 124.70 5331.54 500.00 2.411 73 46.05 4837.77 290.07 4859.50 125.06 5331.49 500.00 2.411 74 46.05 4837.77 290.59 4859.50 125.42 5331.43 500.00 2.411 75 46.05 4837.77 291.12 4859.50 125.78 5331.37 500.00 2.411 76 46.05 4837.77 291.65 4859.50 126.14 5331.31 500.00 2.411 77 46.05 4837.77 292.17 4859.50 126.50 5331.25 500.00 2.411 78 46.05 4837.77 292.70 4859.50 126.86 5331.20 500.00 2.411 79 45.00 4837.76 283.75 4859.50 119.60 5340.42 508.16 2.411 80 46.05 4837.77 282.70 4859.50 119.96 5332.28 500.00 2.413 81 45.53 4837.76 285.86 4859.50 121.23 5340.26 508.16 2.413 82 45.53 4837.76 285.33 4859.50 120.86 5340.31 508.16 2.413 83 45.53 4837.76 286.38 4859.50 121.59 5340.20 508.16 2.413 84 45.53 4837.76 286.91 4859.50 121.96 5340.15 508.16 2.413 85 45.53 4837.76 287.44 4859.50 122.32 5340.09 508.16 2.413 86 45.53 4837.76 284.81 4859.50 120.50 5340.37 508.16 2.413 87 45.53 4837.76 288.49 4859.50 123.05 5339.98 508.16 2.413 88 45.53 4837.76 287.96 4859.50 122.69 5340.04 508.16 2.413 89 45.53 4837.76 289.54 4859.50 123.78 5339.87 508.16 2.413 90 45.53 4837.76 289.02 4859.50 123.41 5339.92 508.16 2.413 91 45.53 4837.76 290.07 4859.50 124.14 5339.81 508.16 2.414 92 45.53 4837.76 290.59 4859.50 124.50 5339.75 508.16 2.414 93 45.53 4837.76 291.12 4859.50 124.86 5339.70 508.16 2.414 94 45.53 4837.76 291.65 4859.50 125.22 5339.64 508.16 2.414 95 45.53 4837.76 283.23 4859.50 119.40 5340.53 508.16 2.414 96 45.53 4837.76 292.17 4859.50 125.58 5339.58 508.16 2.414 97 45.53 4837.76 292.70 4859.50 125.95 5339.52 508.16 2.414 98 45.53 4837.76 282.70 4859.50 119.03 5340.58 508.16 2.414 99 45.53 4837.76 283.75 4859.50 119.76 5340.48 508.16 2.415 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4837.76 XR: 284.81 YR: 4859.50 Centre: XC: 121.09 YC: 5331.94 Radius: R: 500.00 Generated failure surface: (20 points) 45.00 4837.76 57.67 4835.97 70.39 4834.51 83.14 4833.38 95.91 4832.57 108.70 4832.09 121.50 4831.94 134.29 4832.11 147.08 4832.61 159.85 4833.44 172.60 4834.60 185.31 4836.08 197.98 4837.88 210.60 4840.02 223.16 4842.47 235.66 4845.24 248.08 4848.33 260.41 4851.74 272.66 4855.46 284.81 4859.50 Slice Geometry and Properties - Critical Failure Surface (circle 1, 46 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.86 -8.0 5.00 5.05 1 50.00 25.0 213.94 117.23 46.36 1.04 2 50.00 19.71 -8.0 7.67 7.75 1 50.00 25.0 2271.92 653.56 305.05 1.04 3 57.67 37.01 -6.6 6.36 6.40 1 50.00 25.0 4268.34 949.55 685.78 1.03 4 64.03 55.17 -6.6 6.36 6.40 1 50.00 25.0 6364.28 1284.91 1021.78 1.03 5 70.39 73.02 -5.1 6.37 6.40 1 50.00 25.0 8424.85 1587.89 1342.54 1.02 6 76.76 90.23 -5.1 6.37 6.40 1 50.00 25.0 10411.20 1858.32 1658.91 1.02 7 83.14 102.93 -3.6 6.15 6.17 1 50.00 25.0 11878.20 2015.95 1951.81 1.01 8 89.29 117.99 -3.6 6.15 6.17 1 50.00 25.0 13616.84 2206.42 2237.52 1.01 9 95.44 132.09 -2.3 6.13 6.13 1 50.00 25.0 15150.63 2358.84 2489.06 1.01 10 101.57 146.07 -2.2 6.13 6.13 1 50.00 25.0 16576.59 2487.42 2722.41 1.01 11 107.70 24.97 -2.2 1.00 1.00 1 50.00 25.0 2821.23 417.75 2842.00 1.01 12 108.70 160.39 -0.7 6.40 6.40 1 50.00 25.0 18123.19 2721.48 2838.17 1.00 13 115.10 161.06 -0.7 6.40 6.40 1 50.00 25.0 18204.64 2796.35 2850.90 1.00 14 121.50 122.26 0.8 4.85 4.85 1 50.00 25.0 13822.68 2151.18 2842.45 1.00 15 126.35 122.04 0.8 4.85 4.85 1 50.00 25.0 13800.17 2156.50 2837.78 1.00 16 131.20 75.33 0.8 3.00 3.00 1 50.00 25.0 8045.24 2903.88 2676.98 1.00 17 134.20 160.93 2.2 6.44 6.45 1 50.00 25.0 19818.88 9560.04 3064.04 0.99 18 140.64 159.53 2.2 6.44 6.45 1 50.00 25.0 19652.66 9458.46 3038.18 0.99 19 147.08 156.24 3.7 6.39 6.40 1 50.00 25.0 19258.29 9255.93 2994.92 0.99 20 153.47 153.82 3.7 6.39 6.40 1 50.00 25.0 18974.87 9090.59 2950.76 0.99 21 159.85 150.57 5.2 6.37 6.40 1 50.00 25.0 18594.06 8892.45 2889.29 0.99 22 166.23 147.11 5.2 6.37 6.40 1 50.00 25.0 18191.26 8661.79 2826.56 0.99 23 172.60 142.75 6.6 6.36 6.40 1 50.00 25.0 17681.74 8398.56 2746.84 0.98 24 178.96 138.27 6.6 6.36 6.40 1 50.00 25.0 17161.19 8102.97 2665.74 0.98 25 185.31 132.82 8.1 6.34 6.40 1 50.00 25.0 16525.15 7774.44 2568.03 0.98 26 191.65 127.32 8.1 6.34 6.40 1 50.00 25.0 15887.83 7414.01 2468.60 0.98 27 197.98 55.62 9.6 2.86 2.90 1 50.00 25.0 6958.38 3238.33 2385.25 0.98 28 200.85 91.70 9.6 4.88 4.95 2 10.00 35.0 11470.23 5316.23 2290.60 0.97 29 205.72 87.81 9.6 4.88 4.95 2 10.00 35.0 10960.68 5062.01 2188.61 0.97 30 210.60 106.80 11.0 6.28 6.40 2 10.00 35.0 13293.61 6138.22 2053.45 0.96 31 216.88 99.31 11.0 6.28 6.40 2 10.00 35.0 12314.04 5648.65 1901.76 0.96 32 223.16 45.19 12.5 3.04 3.11 2 10.00 35.0 5583.77 2560.12 1776.94 0.96 33 226.20 57.76 12.5 4.00 4.10 2 10.00 35.0 7085.98 3174.19 1709.99 0.96 34 230.20 56.81 12.5 4.00 4.10 2 10.00 35.0 6884.14 2947.23 1659.23 0.96 35 234.20 20.33 12.5 1.46 1.49 2 10.00 35.0 2445.33 1018.79 1614.27 0.96 36 235.66 80.93 14.0 6.21 6.40 2 10.00 35.0 9674.50 3987.84 1493.69 0.96 37 241.87 71.73 14.0 6.21 6.40 2 10.00 35.0 8466.29 3370.55 1305.76 0.96 38 248.08 61.62 15.4 6.17 6.40 2 10.00 35.0 7145.63 2721.50 1102.70 0.96 39 254.25 51.50 15.4 6.17 6.40 2 10.00 35.0 5818.35 2041.03 895.64 0.96 40 260.41 28.65 16.9 4.14 4.33 2 10.00 35.0 3129.76 980.00 711.65 0.96 41 264.55 23.17 16.9 4.05 4.24 1 50.00 25.0 2462.04 630.06 575.95 0.99 42 268.61 18.35 16.9 4.05 4.24 1 50.00 25.0 1904.73 304.44 441.82 0.99 43 272.66 5.92 18.4 1.61 1.70 1 50.00 25.0 598.47 28.36 343.24 0.99 44 274.27 11.52 18.4 4.21 4.44 1 50.00 25.0 1152.48 0.00 250.39 0.99 45 278.49 5.81 18.4 4.21 4.44 1 50.00 25.0 580.66 0.00 122.93 0.99 46 282.70 0.74 18.4 2.11 2.22 1 50.00 25.0 73.60 0.00 26.33 0.99 X-S Area: 3892.75 Path Length: 243.17 X-S Weight: 463742.47 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-Sl-Mining.gmf Processed: 22 Jan 2026 09:25:30 DATA: Analysis 1 - Slope Stability - Case S-1 - Mining Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4863.00 208.90 4863.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 132.40 4860.60 135.40 4860.60 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4857.50 132.40 4857.50 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 135.40 4857.50 208.90 4857.50 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4841.00 50.00 4841.00 132.40 4841.00 Profile: 6 (2 points) Material beneath: 1 - Clay 135.40 4841.00 208.90 4841.10 Profile: 7 (2 points) Material beneath: 1 - Clay 132.40 4838.00 135.40 4838.00 Slope Surface (14 points) 0.00 4841.00 50.00 4841.00 108.90 4860.70 132.40 4860.60 135.40 4860.60 158.90 4860.50 169.60 4860.60 175.20 4861.60 179.60 4860.20 183.60 4861.70 189.10 4861.90 193.20 4860.70 202.70 4861.00 208.90 4862.40 Phreatic Surface (5 points) 0.00 4841.00 50.00 4841.00 132.40 4842.00 135.40 4858.20 208.90 4858.20 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4841.00 XR: 163.90 YR: 4860.55 Centre: XC: 57.16 YC: 5140.91 Radius: R: 300.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-1 - Mining Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 4.036 Analysis Summary There were: 16822 successful analyses from a total of 20001 trial failure surfaces 3179 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 3.13 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4841.00 168.90 4860.59 81.43 5012.17 175.00 3.128 <-- Critical Surface 2 45.00 4841.00 168.37 4860.59 81.05 5012.25 175.00 3.133 3 45.00 4841.00 167.85 4860.58 80.67 5012.33 175.00 3.139 4 45.00 4841.00 167.32 4860.58 80.29 5012.40 175.00 3.144 5 45.53 4841.00 168.37 4860.59 81.19 5012.33 175.00 3.149 6 45.00 4841.00 166.79 4860.57 79.91 5012.48 175.00 3.149 7 45.53 4841.00 168.90 4860.59 81.57 5012.25 175.00 3.152 8 45.00 4841.00 166.27 4860.57 79.53 5012.56 175.00 3.155 9 45.53 4841.00 167.85 4860.58 80.81 5012.41 175.00 3.155 10 45.00 4841.00 165.74 4860.56 79.15 5012.64 175.00 3.160 11 45.53 4841.00 167.32 4860.58 80.43 5012.48 175.00 3.160 12 45.00 4841.00 164.69 4860.55 78.38 5012.79 175.00 3.164 13 45.00 4841.00 165.22 4860.56 78.76 5012.71 175.00 3.164 14 45.53 4841.00 166.79 4860.57 80.05 5012.56 175.00 3.165 15 46.05 4841.00 168.37 4860.59 81.33 5012.41 175.00 3.165 16 46.05 4841.00 168.90 4860.59 81.71 5012.33 175.00 3.165 17 45.53 4841.00 166.27 4860.57 79.67 5012.64 175.00 3.170 18 46.05 4841.00 167.85 4860.58 80.95 5012.48 175.00 3.170 19 45.00 4841.00 164.16 4860.55 77.99 5012.86 175.00 3.175 20 45.53 4841.00 165.74 4860.56 79.28 5012.71 175.00 3.175 21 45.00 4841.00 168.90 4860.59 80.58 5017.55 180.10 3.175 22 46.05 4841.00 167.32 4860.58 80.57 5012.56 175.00 3.176 23 46.58 4841.00 168.90 4860.59 81.85 5012.41 175.00 3.179 24 45.53 4841.00 165.22 4860.56 78.90 5012.79 175.00 3.180 25 45.00 4841.00 163.64 4860.54 77.60 5012.94 175.00 3.180 26 45.00 4841.00 168.37 4860.59 80.20 5017.63 180.10 3.180 27 46.05 4841.00 166.79 4860.57 80.19 5012.64 175.00 3.181 28 45.53 4841.00 164.69 4860.55 78.51 5012.86 175.00 3.181 29 46.58 4841.00 168.37 4860.59 81.47 5012.49 175.00 3.181 30 45.00 4841.00 163.11 4860.54 77.22 5013.01 175.00 3.185 31 46.05 4841.00 166.27 4860.57 79.80 5012.71 175.00 3.185 32 45.00 4841.00 167.85 4860.58 79.82 5017.71 180.10 3.186 33 46.58 4841.00 167.85 4860.58 81.09 5012.56 175.00 3.186 34 45.00 4841.00 162.58 4860.53 76.83 5013.08 175.00 3.189 35 45.53 4841.00 164.16 4860.55 78.12 5012.94 175.00 3.189 36 46.05 4841.00 165.74 4860.56 79.42 5012.79 175.00 3.190 37 45.53 4841.00 168.90 4860.59 80.72 5017.63 180.10 3.191 38 45.00 4841.00 167.32 4860.58 79.43 5017.78 180.10 3.191 39 46.58 4841.00 167.32 4860.58 80.71 5012.64 175.00 3.191 40 47.11 4841.00 168.90 4860.59 81.99 5012.49 175.00 3.192 41 46.05 4841.00 165.22 4860.56 79.03 5012.86 175.00 3.195 42 45.00 4841.00 166.79 4860.57 79.05 5017.85 180.10 3.196 43 45.53 4841.00 168.37 4860.59 80.33 5017.71 180.10 3.196 44 46.58 4841.00 166.79 4860.57 80.32 5012.72 175.00 3.196 45 45.00 4841.00 162.06 4860.53 76.44 5013.15 175.00 3.197 46 46.05 4841.00 164.69 4860.55 78.64 5012.94 175.00 3.198 47 45.00 4841.00 166.27 4860.57 78.66 5017.93 180.10 3.201 48 46.58 4841.00 166.27 4860.57 79.94 5012.79 175.00 3.201 49 45.53 4841.00 167.85 4860.58 79.95 5017.78 180.10 3.201 50 45.00 4841.00 161.53 4860.52 76.05 5013.22 175.00 3.202 51 45.53 4841.00 163.64 4860.54 77.74 5013.01 175.00 3.202 52 47.11 4841.00 167.85 4860.58 81.23 5012.64 175.00 3.202 53 45.53 4841.00 163.11 4860.54 77.35 5013.08 175.00 3.204 54 47.11 4841.00 168.37 4860.59 81.61 5012.56 175.00 3.204 55 45.00 4841.00 165.74 4860.56 78.28 5018.00 180.10 3.205 56 46.58 4841.00 165.74 4860.56 79.55 5012.87 175.00 3.205 57 45.53 4841.00 162.58 4860.53 76.96 5013.15 175.00 3.205 58 45.53 4841.00 167.32 4860.58 79.57 5017.86 180.10 3.206 59 47.11 4841.00 167.32 4860.58 80.84 5012.72 175.00 3.207 60 47.63 4841.00 168.90 4860.59 82.13 5012.57 175.00 3.209 61 46.05 4841.00 163.64 4860.54 77.87 5013.08 175.00 3.209 62 45.00 4841.00 165.22 4860.56 77.89 5018.07 180.10 3.209 63 46.58 4841.00 165.22 4860.56 79.16 5012.94 175.00 3.210 64 45.00 4841.00 161.01 4860.52 75.65 5013.29 175.00 3.211 65 45.53 4841.00 166.79 4860.57 79.18 5017.93 180.10 3.211 66 46.05 4841.00 168.37 4860.59 80.47 5017.78 180.10 3.211 67 46.05 4841.00 164.16 4860.55 78.25 5013.01 175.00 3.212 68 47.11 4841.00 166.79 4860.57 80.46 5012.79 175.00 3.212 69 45.53 4841.00 162.06 4860.53 76.56 5013.23 175.00 3.212 70 45.00 4841.00 160.48 4860.51 75.26 5013.36 175.00 3.212 71 45.00 4841.00 164.69 4860.55 77.50 5018.15 180.10 3.213 72 46.05 4841.00 168.90 4860.59 80.85 5017.71 180.10 3.213 73 46.58 4841.00 164.16 4860.55 78.39 5013.09 175.00 3.213 74 46.05 4841.00 163.11 4860.54 77.48 5013.16 175.00 3.215 75 45.53 4841.00 166.27 4860.57 78.80 5018.00 180.10 3.215 76 45.00 4841.00 164.16 4860.55 77.11 5018.22 180.10 3.216 77 46.05 4841.00 167.85 4860.58 80.09 5017.86 180.10 3.216 78 47.11 4841.00 166.27 4860.57 80.07 5012.87 175.00 3.216 79 45.00 4841.00 159.95 4860.51 74.87 5013.43 175.00 3.217 80 45.53 4841.00 161.53 4860.52 76.17 5013.30 175.00 3.217 81 47.63 4841.00 168.37 4860.59 81.74 5012.64 175.00 3.218 82 47.63 4841.00 167.85 4860.58 81.36 5012.72 175.00 3.218 83 45.53 4841.00 165.74 4860.56 78.41 5018.07 180.10 3.220 84 47.11 4841.00 165.74 4860.56 79.68 5012.94 175.00 3.221 85 45.00 4841.00 168.90 4860.59 79.73 5022.92 185.20 3.221 86 46.05 4841.00 167.32 4860.58 79.70 5017.93 180.10 3.221 87 46.58 4841.00 164.69 4860.55 78.77 5013.01 175.00 3.221 88 45.00 4841.00 159.43 4860.50 74.47 5013.50 175.00 3.221 89 46.05 4841.00 162.58 4860.53 77.08 5013.23 175.00 3.221 90 47.63 4841.00 167.32 4860.58 80.98 5012.79 175.00 3.223 91 45.53 4841.00 161.01 4860.52 75.78 5013.37 175.00 3.224 92 48.16 4841.00 168.90 4860.59 82.26 5012.64 175.00 3.225 93 45.00 4841.00 158.90 4860.50 74.08 5013.57 175.00 3.225 94 45.53 4841.00 164.69 4860.55 77.63 5018.22 180.10 3.226 95 46.05 4841.00 166.79 4860.57 79.32 5018.00 180.10 3.226 96 45.00 4841.00 168.37 4860.59 79.35 5022.99 185.20 3.226 97 46.58 4841.00 168.90 4860.59 80.99 5017.78 180.10 3.226 98 46.58 4841.00 168.37 4860.59 80.61 5017.86 180.10 3.227 99 45.00 4841.00 163.64 4860.54 76.72 5018.29 180.10 3.227 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4841.00 XR: 168.90 YR: 4860.59 Centre: XC: 81.43 YC: 5012.17 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4841.00 51.63 4839.72 58.30 4838.70 65.01 4837.94 71.75 4837.43 78.49 4837.19 85.25 4837.21 91.99 4837.48 98.72 4838.02 105.43 4838.82 112.10 4839.87 118.72 4841.18 125.29 4842.75 131.79 4844.57 138.22 4846.64 144.56 4848.95 150.81 4851.51 156.95 4854.30 162.99 4857.33 168.90 4860.59 Slice Geometry and Properties - Critical Failure Surface (circle 1, 44 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.60 -10.9 2.50 2.55 1 50.00 25.0 69.21 38.24 31.23 1.05 2 47.50 1.81 -10.9 2.50 2.55 1 50.00 25.0 207.76 114.81 87.40 1.05 3 50.00 2.27 -10.9 1.63 1.66 1 50.00 25.0 261.35 117.08 166.17 1.05 4 51.63 8.80 -8.7 3.34 3.38 1 50.00 25.0 1013.69 331.42 311.07 1.04 5 54.97 14.23 -8.7 3.34 3.38 1 50.00 25.0 1640.09 447.55 502.36 1.04 6 58.30 19.55 -6.5 3.35 3.38 1 50.00 25.0 2254.28 550.00 682.68 1.02 7 61.66 24.59 -6.5 3.35 3.38 1 50.00 25.0 2836.45 638.97 858.77 1.02 8 65.01 29.53 -4.3 3.37 3.38 1 50.00 25.0 3406.48 714.26 1022.11 1.01 9 68.38 34.17 -4.3 3.37 3.38 1 50.00 25.0 3942.00 775.98 1182.78 1.01 10 71.75 38.68 -2.1 3.37 3.38 1 50.00 25.0 4462.16 823.81 1329.01 1.01 11 75.12 42.90 -2.1 3.37 3.38 1 50.00 25.0 4949.40 858.17 1474.16 1.01 12 78.49 46.92 0.1 3.38 3.38 1 50.00 25.0 5414.69 878.63 1603.39 1.00 13 81.87 50.71 0.1 3.38 3.38 1 50.00 25.0 5852.01 885.62 1732.89 1.00 14 85.25 54.22 2.4 3.37 3.38 1 50.00 25.0 6258.54 878.74 1845.06 0.99 15 88.62 57.56 2.4 3.37 3.38 1 50.00 25.0 6644.36 858.17 1958.70 0.99 16 91.99 60.54 4.6 3.37 3.38 1 50.00 25.0 6988.27 823.82 2053.75 0.99 17 95.36 63.42 4.6 3.37 3.38 1 50.00 25.0 7321.78 775.78 2151.57 0.99 18 98.72 11.80 6.8 0.61 0.61 1 50.00 25.0 1362.73 135.62 2196.19 0.99 19 99.33 60.13 6.8 3.05 3.07 1 50.00 25.0 6920.19 639.81 2233.22 0.99 20 102.38 62.14 6.8 3.05 3.07 1 50.00 25.0 7105.62 577.62 2292.71 0.99 21 105.43 73.03 9.0 3.47 3.52 1 50.00 25.0 8298.63 570.59 2335.28 0.99 22 108.90 67.33 9.0 3.20 3.24 1 50.00 25.0 7625.61 426.61 2332.02 0.99 23 112.10 58.40 11.2 2.85 2.90 1 50.00 25.0 6613.56 292.45 2257.44 0.99 24 114.94 56.77 11.2 2.85 2.90 1 50.00 25.0 6427.30 196.73 2192.98 0.99 25 117.79 18.25 11.2 0.93 0.95 2 10.00 35.0 2064.37 43.65 2121.34 0.98 26 118.72 54.89 13.4 2.87 2.95 2 10.00 35.0 6190.23 59.78 2048.05 0.98 27 121.59 67.78 13.4 3.70 3.80 2 10.00 35.0 7620.66 0.00 1955.57 0.98 28 125.29 56.63 15.6 3.25 3.38 2 10.00 35.0 6360.41 0.00 1840.24 0.98 29 128.54 53.63 15.6 3.25 3.38 2 10.00 35.0 6016.21 0.00 1740.55 0.98 30 131.79 9.73 17.8 0.61 0.64 2 10.00 35.0 1090.94 0.00 1665.19 0.98 31 132.40 8.57 17.8 0.54 0.57 3 0.00 45.0 857.30 0.00 1427.78 0.95 32 132.94 37.49 17.8 2.46 2.58 3 0.00 45.0 3901.74 1003.61 1477.08 0.95 33 135.40 40.59 17.8 2.82 2.96 2 10.00 35.0 5045.46 2218.87 1720.36 0.98 34 138.22 42.40 20.0 3.17 3.38 2 10.00 35.0 5251.63 2314.46 1581.51 0.98 35 141.39 38.68 20.0 3.17 3.38 2 10.00 35.0 4770.35 2070.66 1435.80 0.98 36 144.56 34.26 22.3 3.12 3.38 2 10.00 35.0 4200.72 1814.14 1275.52 0.99 37 147.68 30.23 22.3 3.12 3.38 2 10.00 35.0 3677.36 1544.85 1115.38 0.99 38 150.81 25.58 24.5 3.07 3.38 2 10.00 35.0 3077.92 1262.93 942.31 1.00 39 153.88 21.24 24.5 3.07 3.38 2 10.00 35.0 2515.61 968.54 768.17 1.00 40 156.95 11.11 26.7 1.95 2.18 2 10.00 35.0 1289.97 463.16 616.16 1.01 41 158.90 17.22 26.7 4.09 4.57 2 10.00 35.0 1911.87 540.84 430.90 1.01 42 162.99 4.37 28.9 1.57 1.80 1 50.00 25.0 447.40 48.66 256.74 1.06 43 164.56 3.83 28.9 2.17 2.48 1 50.00 25.0 382.84 0.00 154.91 1.06 44 166.73 1.28 28.9 2.17 2.48 1 50.00 25.0 127.54 0.00 46.17 1.06 X-S Area: 1517.87 Path Length: 128.29 X-S Weight: 174676.69 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-Sl-Mining-EQ.gmf Processed: 22 Jan 2026 09:25:58 DATA: Analysis 1 - Slope Stability - Case S-1 - Mining Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4863.00 208.90 4863.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 132.40 4860.60 135.40 4860.60 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4857.50 132.40 4857.50 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 135.40 4857.50 208.90 4857.50 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4841.00 50.00 4841.00 132.40 4841.00 Profile: 6 (2 points) Material beneath: 1 - Clay 135.40 4841.00 208.90 4841.10 Profile: 7 (2 points) Material beneath: 1 - Clay 132.40 4838.00 135.40 4838.00 Slope Surface (14 points) 0.00 4841.00 50.00 4841.00 108.90 4860.70 132.40 4860.60 135.40 4860.60 158.90 4860.50 169.60 4860.60 175.20 4861.60 179.60 4860.20 183.60 4861.70 189.10 4861.90 193.20 4860.70 202.70 4861.00 208.90 4862.40 Phreatic Surface (5 points) 0.00 4841.00 50.00 4841.00 132.40 4842.00 135.40 4858.20 208.90 4858.20 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4841.00 XR: 163.90 YR: 4860.55 Centre: XC: 57.16 YC: 5140.91 Radius: R: 300.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-1 - Mining Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.815 Analysis Summary There were: 16822 successful analyses from a total of 20001 trial failure surfaces 3179 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.16 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4841.00 168.90 4860.59 81.43 5012.17 175.00 2.159 <-- Critical Surface 2 45.00 4841.00 168.37 4860.59 81.05 5012.25 175.00 2.166 3 45.00 4841.00 167.85 4860.58 80.67 5012.33 175.00 2.173 4 45.53 4841.00 168.90 4860.59 81.57 5012.25 175.00 2.174 5 45.53 4841.00 168.37 4860.59 81.19 5012.33 175.00 2.176 6 45.00 4841.00 167.32 4860.58 80.29 5012.40 175.00 2.180 7 46.05 4841.00 168.90 4860.59 81.71 5012.33 175.00 2.183 8 45.53 4841.00 167.85 4860.58 80.81 5012.41 175.00 2.183 9 46.05 4841.00 168.37 4860.59 81.33 5012.41 175.00 2.186 10 45.00 4841.00 166.79 4860.57 79.91 5012.48 175.00 2.186 11 45.53 4841.00 167.32 4860.58 80.43 5012.48 175.00 2.190 12 46.58 4841.00 168.90 4860.59 81.85 5012.41 175.00 2.191 13 45.00 4841.00 168.90 4860.59 80.58 5017.55 180.10 2.191 14 46.05 4841.00 167.85 4860.58 80.95 5012.48 175.00 2.193 15 45.00 4841.00 166.27 4860.57 79.53 5012.56 175.00 2.193 16 46.58 4841.00 168.37 4860.59 81.47 5012.49 175.00 2.196 17 45.53 4841.00 166.79 4860.57 80.05 5012.56 175.00 2.196 18 45.00 4841.00 168.37 4860.59 80.20 5017.63 180.10 2.198 19 47.11 4841.00 168.90 4860.59 81.99 5012.49 175.00 2.199 20 46.05 4841.00 167.32 4860.58 80.57 5012.56 175.00 2.199 21 45.00 4841.00 165.74 4860.56 79.15 5012.64 175.00 2.200 22 45.53 4841.00 168.90 4860.59 80.72 5017.63 180.10 2.201 23 46.58 4841.00 167.85 4860.58 81.09 5012.56 175.00 2.203 24 45.53 4841.00 166.27 4860.57 79.67 5012.64 175.00 2.203 25 45.00 4841.00 167.85 4860.58 79.82 5017.71 180.10 2.205 26 46.05 4841.00 166.79 4860.57 80.19 5012.64 175.00 2.206 27 45.00 4841.00 165.22 4860.56 78.76 5012.71 175.00 2.206 28 45.53 4841.00 168.37 4860.59 80.33 5017.71 180.10 2.208 29 46.58 4841.00 167.32 4860.58 80.71 5012.64 175.00 2.209 30 47.63 4841.00 168.90 4860.59 82.13 5012.57 175.00 2.209 31 45.53 4841.00 165.74 4860.56 79.28 5012.71 175.00 2.209 32 45.00 4841.00 164.69 4860.55 78.38 5012.79 175.00 2.210 33 47.11 4841.00 168.37 4860.59 81.61 5012.56 175.00 2.210 34 45.00 4841.00 167.32 4860.58 79.43 5017.78 180.10 2.211 35 47.11 4841.00 167.85 4860.58 81.23 5012.64 175.00 2.212 36 46.05 4841.00 166.27 4860.57 79.80 5012.71 175.00 2.213 37 45.53 4841.00 167.85 4860.58 79.95 5017.78 180.10 2.214 38 46.05 4841.00 168.90 4860.59 80.85 5017.71 180.10 2.215 39 46.58 4841.00 166.79 4860.57 80.32 5012.72 175.00 2.216 40 45.53 4841.00 165.22 4860.56 78.90 5012.79 175.00 2.216 41 46.05 4841.00 168.37 4860.59 80.47 5017.78 180.10 2.217 42 45.00 4841.00 166.79 4860.57 79.05 5017.85 180.10 2.218 43 47.63 4841.00 168.37 4860.59 81.74 5012.64 175.00 2.218 44 47.11 4841.00 167.32 4860.58 80.84 5012.72 175.00 2.219 45 46.05 4841.00 165.74 4860.56 79.42 5012.79 175.00 2.219 46 48.16 4841.00 168.90 4860.59 82.26 5012.64 175.00 2.219 47 45.00 4841.00 164.16 4860.55 77.99 5012.86 175.00 2.220 48 45.53 4841.00 164.69 4860.55 78.51 5012.86 175.00 2.220 49 45.53 4841.00 167.32 4860.58 79.57 5017.86 180.10 2.221 50 45.00 4841.00 168.90 4860.59 79.73 5022.92 185.20 2.222 51 46.58 4841.00 166.27 4860.57 79.94 5012.79 175.00 2.222 52 47.63 4841.00 167.85 4860.58 81.36 5012.72 175.00 2.222 53 46.58 4841.00 168.90 4860.59 80.99 5017.78 180.10 2.223 54 46.05 4841.00 167.85 4860.58 80.09 5017.86 180.10 2.224 55 45.00 4841.00 166.27 4860.57 78.66 5017.93 180.10 2.225 56 47.11 4841.00 166.79 4860.57 80.46 5012.79 175.00 2.225 57 46.05 4841.00 165.22 4860.56 79.03 5012.86 175.00 2.225 58 45.00 4841.00 163.64 4860.54 77.60 5012.94 175.00 2.226 59 48.16 4841.00 168.37 4860.59 81.88 5012.72 175.00 2.226 60 46.58 4841.00 168.37 4860.59 80.61 5017.86 180.10 2.227 61 45.53 4841.00 166.79 4860.57 79.18 5017.93 180.10 2.227 62 46.58 4841.00 165.74 4860.56 79.55 5012.87 175.00 2.229 63 47.63 4841.00 167.32 4860.58 80.98 5012.79 175.00 2.229 64 45.00 4841.00 168.37 4860.59 79.35 5022.99 185.20 2.229 65 48.68 4841.00 168.90 4860.59 82.40 5012.72 175.00 2.229 66 45.53 4841.00 164.16 4860.55 78.12 5012.94 175.00 2.229 67 46.05 4841.00 167.32 4860.58 79.70 5017.93 180.10 2.230 68 47.11 4841.00 168.90 4860.59 81.13 5017.86 180.10 2.231 69 46.05 4841.00 164.69 4860.55 78.64 5012.94 175.00 2.231 70 45.00 4841.00 165.74 4860.56 78.28 5018.00 180.10 2.231 71 45.53 4841.00 168.90 4860.59 79.87 5022.99 185.20 2.231 72 47.11 4841.00 166.27 4860.57 80.07 5012.87 175.00 2.232 73 45.00 4841.00 163.11 4860.54 77.22 5013.01 175.00 2.233 74 46.58 4841.00 167.85 4860.58 80.22 5017.93 180.10 2.233 75 45.53 4841.00 166.27 4860.57 78.80 5018.00 180.10 2.234 76 46.58 4841.00 165.22 4860.56 79.16 5012.94 175.00 2.235 77 47.63 4841.00 166.79 4860.57 80.59 5012.87 175.00 2.235 78 45.00 4841.00 167.85 4860.58 78.96 5023.06 185.20 2.235 79 48.68 4841.00 168.37 4860.59 82.02 5012.80 175.00 2.236 80 46.05 4841.00 166.79 4860.57 79.32 5018.00 180.10 2.237 81 48.16 4841.00 167.85 4860.58 81.50 5012.80 175.00 2.237 82 45.00 4841.00 165.22 4860.56 77.89 5018.07 180.10 2.237 83 45.53 4841.00 168.37 4860.59 79.48 5023.06 185.20 2.238 84 47.11 4841.00 165.74 4860.56 79.68 5012.94 175.00 2.238 85 48.16 4841.00 167.32 4860.58 81.11 5012.87 175.00 2.239 86 49.21 4841.00 168.90 4860.59 82.53 5012.80 175.00 2.239 87 47.63 4841.00 168.90 4860.59 81.26 5017.93 180.10 2.239 88 45.00 4841.00 162.58 4860.53 76.83 5013.08 175.00 2.239 89 46.58 4841.00 167.32 4860.58 79.84 5018.00 180.10 2.240 90 45.53 4841.00 165.74 4860.56 78.41 5018.07 180.10 2.240 91 45.53 4841.00 163.64 4860.54 77.74 5013.01 175.00 2.241 92 47.11 4841.00 168.37 4860.59 80.74 5017.93 180.10 2.241 93 47.63 4841.00 166.27 4860.57 80.20 5012.94 175.00 2.242 94 45.00 4841.00 167.32 4860.58 78.57 5023.14 185.20 2.242 95 47.11 4841.00 167.85 4860.58 80.36 5018.01 180.10 2.243 96 45.00 4841.00 164.69 4860.55 77.50 5018.15 180.10 2.243 97 46.05 4841.00 166.27 4860.57 78.93 5018.08 180.10 2.243 98 46.05 4841.00 164.16 4860.55 78.25 5013.01 175.00 2.244 99 46.58 4841.00 164.16 4860.55 78.39 5013.09 175.00 2.244 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4841.00 XR: 168.90 YR: 4860.59 Centre: XC: 81.43 YC: 5012.17 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4841.00 51.63 4839.72 58.30 4838.70 65.01 4837.94 71.75 4837.43 78.49 4837.19 85.25 4837.21 91.99 4837.48 98.72 4838.02 105.43 4838.82 112.10 4839.87 118.72 4841.18 125.29 4842.75 131.79 4844.57 138.22 4846.64 144.56 4848.95 150.81 4851.51 156.95 4854.30 162.99 4857.33 168.90 4860.59 Slice Geometry and Properties - Critical Failure Surface (circle 1, 44 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.60 -10.9 2.50 2.55 1 50.00 25.0 69.21 38.24 32.89 1.06 2 47.50 1.81 -10.9 2.50 2.55 1 50.00 25.0 207.76 114.81 89.41 1.06 3 50.00 2.27 -10.9 1.63 1.66 1 50.00 25.0 261.35 117.08 168.90 1.06 4 51.63 8.80 -8.7 3.34 3.38 1 50.00 25.0 1013.69 331.42 314.46 1.05 5 54.97 14.23 -8.7 3.34 3.38 1 50.00 25.0 1640.09 447.55 507.41 1.05 6 58.30 19.55 -6.5 3.35 3.38 1 50.00 25.0 2254.28 550.00 687.57 1.03 7 61.66 24.59 -6.5 3.35 3.38 1 50.00 25.0 2836.45 638.97 864.83 1.03 8 65.01 29.53 -4.3 3.37 3.38 1 50.00 25.0 3406.48 714.26 1026.78 1.02 9 68.38 34.17 -4.3 3.37 3.38 1 50.00 25.0 3942.00 775.98 1188.17 1.02 10 71.75 38.68 -2.1 3.37 3.38 1 50.00 25.0 4462.16 823.81 1331.91 1.01 11 75.12 42.90 -2.1 3.37 3.38 1 50.00 25.0 4949.40 858.17 1477.38 1.01 12 78.49 46.92 0.1 3.38 3.38 1 50.00 25.0 5414.69 878.63 1603.16 1.00 13 81.87 50.71 0.1 3.38 3.38 1 50.00 25.0 5852.01 885.62 1732.63 1.00 14 85.25 54.22 2.4 3.37 3.38 1 50.00 25.0 6258.54 878.74 1840.45 0.99 15 88.62 57.56 2.4 3.37 3.38 1 50.00 25.0 6644.36 858.17 1953.76 0.99 16 91.99 60.54 4.6 3.37 3.38 1 50.00 25.0 6988.27 823.82 2043.67 0.99 17 95.36 63.42 4.6 3.37 3.38 1 50.00 25.0 7321.78 775.78 2140.92 0.99 18 98.72 11.80 6.8 0.61 0.61 1 50.00 25.0 1362.73 135.62 2180.10 0.98 19 99.33 60.13 6.8 3.05 3.07 1 50.00 25.0 6920.19 639.81 2216.69 0.98 20 102.38 62.14 6.8 3.05 3.07 1 50.00 25.0 7105.62 577.62 2275.58 0.98 21 105.43 73.03 9.0 3.47 3.52 1 50.00 25.0 8298.63 570.59 2311.96 0.98 22 108.90 67.33 9.0 3.20 3.24 1 50.00 25.0 7625.61 426.61 2308.42 0.98 23 112.10 58.40 11.2 2.85 2.90 1 50.00 25.0 6613.56 292.45 2228.68 0.98 24 114.94 56.77 11.2 2.85 2.90 1 50.00 25.0 6427.30 196.73 2164.64 0.98 25 117.79 18.25 11.2 0.93 0.95 2 10.00 35.0 2064.37 43.65 2082.30 0.96 26 118.72 54.89 13.4 2.87 2.95 2 10.00 35.0 6190.23 59.78 2002.67 0.95 27 121.59 67.78 13.4 3.70 3.80 2 10.00 35.0 7620.66 0.00 1911.77 0.95 28 125.29 56.63 15.6 3.25 3.38 2 10.00 35.0 6360.41 0.00 1792.51 0.95 29 128.54 53.63 15.6 3.25 3.38 2 10.00 35.0 6016.21 0.00 1695.36 0.95 30 131.79 9.73 17.8 0.61 0.64 2 10.00 35.0 1090.94 0.00 1616.10 0.95 31 132.40 8.57 17.8 0.54 0.57 3 0.00 45.0 857.30 0.00 1370.39 0.91 32 132.94 37.49 17.8 2.46 2.58 3 0.00 45.0 3901.74 1003.61 1433.40 0.91 33 135.40 40.59 17.8 2.82 2.96 2 10.00 35.0 5045.46 2218.87 1691.56 0.95 34 138.22 42.40 20.0 3.17 3.38 2 10.00 35.0 5251.63 2314.46 1551.68 0.95 35 141.39 38.68 20.0 3.17 3.38 2 10.00 35.0 4770.35 2070.66 1408.39 0.95 36 144.56 34.26 22.3 3.12 3.38 2 10.00 35.0 4200.72 1814.14 1248.22 0.95 37 147.68 30.23 22.3 3.12 3.38 2 10.00 35.0 3677.36 1544.85 1091.00 0.95 38 150.81 25.58 24.5 3.07 3.38 2 10.00 35.0 3077.92 1262.93 919.11 0.96 39 153.88 21.24 24.5 3.07 3.38 2 10.00 35.0 2515.61 968.54 748.44 0.96 40 156.95 11.11 26.7 1.95 2.18 2 10.00 35.0 1289.97 463.16 598.04 0.96 41 158.90 17.22 26.7 4.09 4.57 2 10.00 35.0 1911.87 540.84 416.71 0.96 42 162.99 4.37 28.9 1.57 1.80 1 50.00 25.0 447.40 48.66 245.63 1.02 43 164.56 3.83 28.9 2.17 2.48 1 50.00 25.0 382.84 0.00 146.27 1.02 44 166.73 1.28 28.9 2.17 2.48 1 50.00 25.0 127.54 0.00 41.12 1.02 X-S Area: 1517.87 Path Length: 128.29 X-S Weight: 174676.69 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S2-Mining.gmf Processed: 22 Jan 2026 09:26:29 DATA: Analysis 1 - Slope Stability - Case S-2 - Mining Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4863.00 293.90 4863.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 135.00 4859.50 138.00 4859.50 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4856.00 135.00 4856.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 138.00 4856.00 293.90 4856.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4838.80 50.00 4839.00 135.00 4839.20 Profile: 6 (2 points) Material beneath: 1 - Clay 138.00 4839.20 293.90 4839.60 Profile: 7 (2 points) Material beneath: 1 - Clay 135.00 4836.20 138.00 4836.20 Slope Surface (10 points) 0.00 4838.80 50.00 4839.00 111.50 4859.40 135.00 4859.50 138.00 4859.50 207.20 4860.00 217.80 4862.20 243.90 4862.60 250.90 4862.60 293.90 4862.40 Phreatic Surface (5 points) 0.00 4838.80 50.00 4839.00 135.00 4840.20 138.00 4856.80 293.90 4856.80 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4839.00 XR: 248.90 YR: 4862.60 Centre: XC: 67.82 YC: 5538.77 Radius: R: 700.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 400.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-2 - Mining Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 5.305 Analysis Summary There were: 18847 successful analyses from a total of 20001 trial failure surfaces 1154 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 4.37 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4838.98 247.06 4862.60 89.19 5337.02 500.00 4.367 <-- Critical Surface 2 45.00 4838.98 246.01 4862.60 88.36 5337.10 500.00 4.368 3 45.00 4838.98 246.53 4862.60 88.77 5337.06 500.00 4.369 4 45.00 4838.98 245.48 4862.60 87.94 5337.13 500.00 4.373 5 45.00 4838.98 247.58 4862.60 89.60 5336.99 500.00 4.375 6 45.53 4838.98 247.06 4862.60 89.30 5337.06 500.00 4.376 7 45.00 4838.98 244.95 4862.60 87.52 5337.17 500.00 4.377 8 45.53 4838.98 246.01 4862.60 88.47 5337.13 500.00 4.381 9 45.00 4838.98 244.43 4862.60 87.10 5337.20 500.00 4.382 10 45.00 4838.98 248.11 4862.60 90.02 5336.95 500.00 4.384 11 45.53 4838.98 247.58 4862.60 89.72 5337.02 500.00 4.384 12 45.53 4838.98 245.48 4862.60 88.05 5337.17 500.00 4.385 13 46.05 4838.98 247.06 4862.60 89.42 5337.10 500.00 4.386 14 45.00 4838.98 243.90 4862.60 86.68 5337.24 500.00 4.386 15 45.53 4838.98 246.53 4862.60 88.89 5337.10 500.00 4.388 16 46.05 4838.98 246.53 4862.60 89.00 5337.14 500.00 4.389 17 45.53 4838.98 244.95 4862.60 87.63 5337.21 500.00 4.389 18 45.00 4838.98 248.64 4862.60 90.43 5336.91 500.00 4.392 19 45.53 4838.98 248.11 4862.60 90.14 5336.99 500.00 4.392 20 46.05 4838.98 247.58 4862.60 89.84 5337.06 500.00 4.392 21 45.00 4838.98 248.11 4862.60 89.06 5345.23 508.16 4.393 22 46.05 4838.98 246.01 4862.60 88.58 5337.17 500.00 4.393 23 45.00 4838.98 249.69 4862.60 91.26 5336.84 500.00 4.393 24 45.53 4838.98 244.43 4862.60 87.21 5337.24 500.00 4.394 25 45.00 4838.98 250.22 4862.60 91.67 5336.80 500.00 4.394 26 45.00 4838.98 250.74 4862.60 92.08 5336.76 500.00 4.395 27 45.00 4838.98 251.27 4862.60 92.49 5336.72 500.00 4.395 28 45.00 4838.98 251.79 4862.60 92.91 5336.68 500.00 4.396 29 45.00 4838.98 247.06 4862.60 88.22 5345.30 508.16 4.396 30 45.00 4838.98 252.32 4862.59 93.32 5336.64 500.00 4.396 31 46.05 4838.98 245.48 4862.60 88.17 5337.21 500.00 4.397 32 45.00 4838.98 252.85 4862.59 93.74 5336.60 500.00 4.399 33 45.00 4838.98 249.16 4862.60 90.85 5336.87 500.00 4.400 34 45.53 4838.98 248.64 4862.60 90.55 5336.95 500.00 4.400 35 46.05 4838.98 248.11 4862.60 90.25 5337.03 500.00 4.401 36 46.58 4838.99 247.58 4862.60 89.95 5337.10 500.00 4.401 37 45.00 4838.98 246.53 4862.60 87.80 5345.34 508.16 4.401 38 45.53 4838.98 248.11 4862.60 89.17 5345.27 508.16 4.401 39 45.00 4838.98 253.90 4862.59 94.56 5336.52 500.00 4.401 40 45.00 4838.98 248.64 4862.60 89.47 5345.19 508.16 4.401 41 46.58 4838.99 246.53 4862.60 89.12 5337.17 500.00 4.402 42 46.05 4838.98 244.95 4862.60 87.75 5337.24 500.00 4.402 43 45.00 4838.98 247.58 4862.60 88.64 5345.27 508.16 4.402 44 45.53 4838.98 243.90 4862.60 86.79 5337.28 500.00 4.404 45 46.58 4838.99 247.06 4862.60 89.53 5337.14 500.00 4.404 46 45.00 4838.98 246.01 4862.60 87.38 5345.37 508.16 4.405 47 45.53 4838.98 249.69 4862.60 91.38 5336.88 500.00 4.405 48 45.00 4838.98 253.37 4862.59 94.15 5336.56 500.00 4.405 49 46.58 4838.99 246.01 4862.60 88.70 5337.21 500.00 4.406 50 45.53 4838.98 250.22 4862.60 91.79 5336.84 500.00 4.406 51 45.53 4838.98 250.74 4862.60 92.20 5336.80 500.00 4.407 52 45.53 4838.98 251.27 4862.60 92.62 5336.76 500.00 4.407 53 45.53 4838.98 251.79 4862.60 93.03 5336.72 500.00 4.408 54 45.53 4838.98 252.32 4862.59 93.45 5336.68 500.00 4.409 55 45.53 4838.98 247.06 4862.60 88.33 5345.34 508.16 4.409 56 45.53 4838.98 249.16 4862.60 90.96 5336.91 500.00 4.409 57 45.00 4838.98 249.16 4862.60 89.89 5345.16 508.16 4.409 58 46.05 4838.98 248.64 4862.60 90.67 5336.99 500.00 4.409 59 45.53 4838.98 248.64 4862.60 89.59 5345.23 508.16 4.409 60 47.11 4838.99 247.58 4862.60 90.06 5337.14 500.00 4.409 61 46.58 4838.99 248.11 4862.60 90.37 5337.07 500.00 4.409 62 45.53 4838.98 252.85 4862.59 93.86 5336.64 500.00 4.409 63 45.00 4838.98 245.48 4862.60 86.96 5345.41 508.16 4.409 64 46.58 4838.99 245.48 4862.60 88.28 5337.24 500.00 4.410 65 46.05 4838.98 243.90 4862.60 86.90 5337.31 500.00 4.411 66 46.05 4838.98 244.43 4862.60 87.32 5337.28 500.00 4.411 67 45.53 4838.98 253.37 4862.59 94.27 5336.60 500.00 4.412 68 45.53 4838.98 246.53 4862.60 87.92 5345.37 508.16 4.413 69 47.11 4838.99 246.53 4862.60 89.23 5337.21 500.00 4.414 70 46.05 4838.98 249.69 4862.60 91.50 5336.92 500.00 4.417 71 46.05 4838.98 247.58 4862.60 88.87 5345.34 508.16 4.417 72 45.53 4838.98 246.01 4862.60 87.50 5345.41 508.16 4.417 73 45.00 4838.98 249.69 4862.60 90.30 5345.12 508.16 4.417 74 46.05 4838.98 249.16 4862.60 91.08 5336.95 500.00 4.417 75 45.53 4838.98 249.16 4862.60 90.00 5345.20 508.16 4.418 76 46.05 4838.98 248.64 4862.60 89.70 5345.27 508.16 4.418 77 46.05 4838.98 248.11 4862.60 89.28 5345.31 508.16 4.418 78 47.11 4838.99 248.11 4862.60 90.48 5337.10 500.00 4.418 79 46.58 4838.99 248.64 4862.60 90.78 5337.03 500.00 4.418 80 46.05 4838.98 250.22 4862.60 91.91 5336.88 500.00 4.418 81 45.00 4838.98 249.16 4862.60 88.93 5353.43 516.33 4.418 82 47.11 4838.99 246.01 4862.60 88.81 5337.25 500.00 4.418 83 45.00 4838.98 244.95 4862.60 86.54 5345.44 508.16 4.418 84 46.05 4838.98 250.74 4862.60 92.32 5336.84 500.00 4.418 85 46.58 4838.99 244.43 4862.60 87.43 5337.31 500.00 4.419 86 45.00 4838.98 244.43 4862.60 86.12 5345.48 508.16 4.419 87 46.58 4838.99 244.95 4862.60 87.86 5337.28 500.00 4.419 88 46.05 4838.98 251.27 4862.60 92.74 5336.80 500.00 4.419 89 46.05 4838.98 251.79 4862.60 93.15 5336.76 500.00 4.420 90 45.53 4838.98 247.58 4862.60 88.75 5345.30 508.16 4.420 91 47.63 4838.99 247.58 4862.60 90.18 5337.18 500.00 4.421 92 46.05 4838.98 252.32 4862.59 93.57 5336.72 500.00 4.421 93 46.05 4838.98 247.06 4862.60 88.45 5345.38 508.16 4.421 94 45.00 4838.98 250.74 4862.60 91.13 5345.05 508.16 4.422 95 47.11 4838.99 247.06 4862.60 89.65 5337.18 500.00 4.422 96 45.00 4838.98 251.27 4862.60 91.55 5345.01 508.16 4.422 97 47.63 4838.99 247.06 4862.60 89.76 5337.21 500.00 4.423 98 45.00 4838.98 251.79 4862.60 91.96 5344.97 508.16 4.423 99 45.00 4838.98 252.32 4862.59 92.38 5344.93 508.16 4.424 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4838.98 XR: 247.06 YR: 4862.60 Centre: XC: 89.19 YC: 5337.02 Radius: R: 500.00 Generated failure surface: (20 points) 45.00 4838.98 55.75 4838.14 66.51 4837.54 77.29 4837.17 88.07 4837.02 98.85 4837.12 109.63 4837.44 120.40 4838.00 131.15 4838.79 141.89 4839.81 152.59 4841.06 163.27 4842.54 173.92 4844.25 184.52 4846.20 195.09 4848.37 205.60 4850.76 216.06 4853.39 226.46 4856.23 236.79 4859.31 247.06 4862.60 Slice Geometry and Properties - Critical Failure Surface (circle 1, 46 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.03 -4.5 5.00 5.02 1 50.00 25.0 117.92 64.18 24.57 1.01 2 50.00 9.12 -4.5 5.75 5.77 1 50.00 25.0 1052.19 242.49 185.08 1.01 3 55.75 20.50 -3.2 5.38 5.39 1 50.00 25.0 2365.23 379.28 442.30 1.01 4 61.13 31.74 -3.2 5.38 5.39 1 50.00 25.0 3663.03 506.75 684.72 1.01 5 66.51 42.71 -2.0 5.39 5.39 1 50.00 25.0 4929.88 614.49 918.37 1.00 6 71.90 53.34 -2.0 5.39 5.39 1 50.00 25.0 6157.61 702.69 1147.04 1.00 7 77.29 63.70 -0.7 5.39 5.39 1 50.00 25.0 7353.67 771.52 1366.03 1.00 8 82.68 73.71 -0.7 5.39 5.39 1 50.00 25.0 8510.50 820.63 1580.90 1.00 9 88.07 83.42 0.5 5.39 5.39 1 50.00 25.0 9632.16 850.36 1785.20 1.00 10 93.46 92.82 0.5 5.39 5.39 1 50.00 25.0 10717.67 860.55 1986.37 1.00 11 98.85 44.22 1.7 2.40 2.40 1 50.00 25.0 5106.82 382.13 2123.87 1.00 12 101.25 81.47 1.7 4.19 4.19 1 50.00 25.0 9364.80 654.35 2227.92 1.00 13 105.44 86.76 1.7 4.19 4.19 1 50.00 25.0 9889.40 636.73 2352.68 1.00 14 109.63 40.38 3.0 1.87 1.87 1 50.00 25.0 4576.76 276.26 2435.12 1.00 15 111.50 96.80 3.0 4.45 4.46 1 50.00 25.0 10953.99 624.55 2448.67 1.00 16 115.95 95.86 3.0 4.45 4.46 1 50.00 25.0 10848.19 577.99 2425.00 1.00 17 120.40 114.27 4.2 5.38 5.39 1 50.00 25.0 12932.18 617.61 2386.65 0.99 18 125.77 112.27 4.2 5.38 5.39 1 50.00 25.0 12705.72 510.51 2344.70 0.99 19 131.15 78.98 5.4 3.85 3.87 1 50.00 25.0 8937.13 290.00 2298.55 0.99 20 135.00 60.61 5.4 3.00 3.01 3 0.00 45.0 6337.35 1730.80 2079.63 0.98 21 138.00 77.28 5.4 3.89 3.90 2 10.00 35.0 9682.93 4182.75 2470.82 0.99 22 141.89 104.02 6.7 5.35 5.39 2 10.00 35.0 13017.13 5610.82 2405.15 0.99 23 147.24 100.88 6.7 5.35 5.39 2 10.00 35.0 12602.08 5400.25 2328.34 0.99 24 152.59 97.15 7.9 5.34 5.39 2 10.00 35.0 12113.16 5170.17 2239.64 0.99 25 157.93 93.40 7.9 5.34 5.39 2 10.00 35.0 11619.23 4920.82 2148.15 0.99 26 163.27 89.05 9.1 5.32 5.39 2 10.00 35.0 11049.57 4652.14 2045.10 0.99 27 168.60 84.70 9.1 5.32 5.39 2 10.00 35.0 10477.80 4364.12 1939.06 0.99 28 173.92 79.75 10.4 5.30 5.39 2 10.00 35.0 9829.68 4056.82 1821.84 0.99 29 179.22 74.80 10.4 5.30 5.39 2 10.00 35.0 9180.70 3730.28 1701.22 0.99 30 184.52 69.27 11.6 5.28 5.39 2 10.00 35.0 8457.28 3384.60 1570.00 0.99 31 189.81 63.74 11.6 5.28 5.39 2 10.00 35.0 7732.56 3019.62 1434.98 0.99 32 195.09 57.64 12.8 5.26 5.39 2 10.00 35.0 6936.29 2635.48 1289.87 0.99 33 200.34 51.54 12.8 5.26 5.39 2 10.00 35.0 6136.99 2232.28 1140.51 0.99 34 205.60 14.46 14.1 1.60 1.65 2 10.00 35.0 1707.00 601.16 1038.40 0.99 35 207.20 38.70 14.1 4.43 4.57 2 10.00 35.0 4491.85 1447.16 986.80 0.99 36 211.63 37.85 14.1 4.43 4.57 2 10.00 35.0 4259.52 1130.69 933.69 0.99 37 216.06 14.63 15.3 1.74 1.81 2 10.00 35.0 1608.24 357.99 891.55 0.99 38 217.80 30.54 15.3 3.90 4.04 2 10.00 35.0 3288.06 605.92 813.50 0.99 39 221.70 26.61 15.3 3.90 4.04 2 10.00 35.0 2770.19 336.53 683.46 0.99 40 225.60 5.32 15.3 0.86 0.89 1 50.00 25.0 541.17 37.84 611.31 1.01 41 226.46 11.08 16.5 1.90 1.98 1 50.00 25.0 1116.33 34.93 566.38 1.01 42 228.36 20.95 16.5 4.22 4.40 1 50.00 25.0 2094.99 0.00 478.21 1.01 43 232.57 15.94 16.6 4.22 4.40 1 50.00 25.0 1593.80 0.00 363.01 1.01 44 236.79 9.39 17.8 3.55 3.73 1 50.00 25.0 939.07 0.00 251.91 1.02 45 240.35 5.53 17.8 3.55 3.73 1 50.00 25.0 553.10 0.00 146.91 1.02 46 243.90 1.60 17.8 3.16 3.32 1 50.00 25.0 160.05 0.00 45.45 1.02 X-S Area: 2559.52 Path Length: 204.86 X-S Weight: 300111.03 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S2-Mining-EQ.gmf Processed: 22 Jan 2026 09:26:57 DATA: Analysis 1 - Slope Stability - Case S-2 - Mining Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4863.00 293.90 4863.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 135.00 4859.50 138.00 4859.50 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4856.00 135.00 4856.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 138.00 4856.00 293.90 4856.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4838.80 50.00 4839.00 135.00 4839.20 Profile: 6 (2 points) Material beneath: 1 - Clay 138.00 4839.20 293.90 4839.60 Profile: 7 (2 points) Material beneath: 1 - Clay 135.00 4836.20 138.00 4836.20 Slope Surface (10 points) 0.00 4838.80 50.00 4839.00 111.50 4859.40 135.00 4859.50 138.00 4859.50 207.20 4860.00 217.80 4862.20 243.90 4862.60 250.90 4862.60 293.90 4862.40 Phreatic Surface (5 points) 0.00 4838.80 50.00 4839.00 135.00 4840.20 138.00 4856.80 293.90 4856.80 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4839.00 XR: 248.90 YR: 4862.60 Centre: XC: 67.82 YC: 5538.77 Radius: R: 700.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 400.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-2 - Mining Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 3.138 Analysis Summary There were: 18847 successful analyses from a total of 20001 trial failure surfaces 1154 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.56 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4838.98 253.90 4862.59 94.56 5336.52 500.00 2.564 <-- Critical Surface 2 45.00 4838.98 252.85 4862.59 93.74 5336.60 500.00 2.569 3 45.00 4838.98 253.37 4862.59 94.15 5336.56 500.00 2.570 4 45.00 4838.98 252.32 4862.59 93.32 5336.64 500.00 2.571 5 45.53 4838.98 253.37 4862.59 94.27 5336.60 500.00 2.572 6 45.00 4838.98 251.79 4862.60 92.91 5336.68 500.00 2.573 7 45.53 4838.98 252.85 4862.59 93.86 5336.64 500.00 2.574 8 45.00 4838.98 251.27 4862.60 92.49 5336.72 500.00 2.576 9 45.53 4838.98 252.32 4862.59 93.45 5336.68 500.00 2.576 10 45.00 4838.98 250.74 4862.60 92.08 5336.76 500.00 2.579 11 45.53 4838.98 251.79 4862.60 93.03 5336.72 500.00 2.579 12 45.00 4838.98 253.90 4862.59 93.62 5344.81 508.16 2.579 13 46.58 4838.99 253.90 4862.59 94.93 5336.64 500.00 2.581 14 45.00 4838.98 250.22 4862.60 91.67 5336.80 500.00 2.582 15 45.53 4838.98 251.27 4862.60 92.62 5336.76 500.00 2.582 16 45.00 4838.98 253.37 4862.59 93.21 5344.85 508.16 2.582 17 46.05 4838.98 253.90 4862.59 94.81 5336.60 500.00 2.582 18 46.05 4838.98 252.32 4862.59 93.57 5336.72 500.00 2.582 19 45.00 4838.98 247.06 4862.60 89.19 5337.02 500.00 2.584 20 45.00 4838.98 249.69 4862.60 91.26 5336.84 500.00 2.584 21 45.53 4838.98 250.74 4862.60 92.20 5336.80 500.00 2.584 22 45.00 4838.98 252.85 4862.59 92.79 5344.89 508.16 2.584 23 46.05 4838.98 251.79 4862.60 93.15 5336.76 500.00 2.585 24 45.00 4838.98 247.58 4862.60 89.60 5336.99 500.00 2.585 25 45.53 4838.98 253.90 4862.59 94.69 5336.56 500.00 2.586 26 47.11 4838.99 253.90 4862.59 95.06 5336.68 500.00 2.586 27 45.53 4838.98 250.22 4862.60 91.79 5336.84 500.00 2.587 28 45.53 4838.98 247.06 4862.60 89.30 5337.06 500.00 2.587 29 45.00 4838.98 252.32 4862.59 92.38 5344.93 508.16 2.587 30 45.00 4838.98 248.11 4862.60 90.02 5336.95 500.00 2.587 31 46.05 4838.98 251.27 4862.60 92.74 5336.80 500.00 2.587 32 45.53 4838.98 253.37 4862.59 93.33 5344.89 508.16 2.587 33 46.58 4838.99 253.37 4862.59 94.52 5336.68 500.00 2.587 34 45.00 4838.98 246.53 4862.60 88.77 5337.06 500.00 2.588 35 46.05 4838.98 253.37 4862.59 94.40 5336.64 500.00 2.588 36 47.11 4838.99 253.37 4862.59 94.64 5336.72 500.00 2.588 37 45.53 4838.98 247.58 4862.60 89.72 5337.02 500.00 2.589 38 45.00 4838.98 248.64 4862.60 90.43 5336.91 500.00 2.589 39 45.53 4838.98 249.69 4862.60 91.38 5336.88 500.00 2.590 40 45.00 4838.98 251.79 4862.60 91.96 5344.97 508.16 2.590 41 46.05 4838.98 250.74 4862.60 92.32 5336.84 500.00 2.590 42 45.53 4838.98 252.85 4862.59 92.92 5344.93 508.16 2.590 43 45.00 4838.98 246.01 4862.60 88.36 5337.10 500.00 2.590 44 46.58 4838.99 251.79 4862.60 93.27 5336.80 500.00 2.590 45 45.53 4838.98 248.11 4862.60 90.14 5336.99 500.00 2.591 46 45.00 4838.98 249.16 4862.60 90.85 5336.87 500.00 2.591 47 47.63 4838.99 253.90 4862.59 95.18 5336.72 500.00 2.592 48 46.05 4838.98 247.06 4862.60 89.42 5337.10 500.00 2.592 49 45.00 4838.98 251.27 4862.60 91.55 5345.01 508.16 2.592 50 46.05 4838.98 250.22 4862.60 91.91 5336.88 500.00 2.593 51 45.53 4838.98 252.32 4862.59 92.50 5344.97 508.16 2.593 52 46.05 4838.98 247.58 4862.60 89.84 5337.06 500.00 2.593 53 45.53 4838.98 248.64 4862.60 90.55 5336.95 500.00 2.593 54 46.58 4838.99 251.27 4862.60 92.86 5336.84 500.00 2.593 55 45.00 4838.98 248.11 4862.60 89.06 5345.23 508.16 2.593 56 47.63 4838.99 253.37 4862.59 94.76 5336.76 500.00 2.594 57 47.11 4838.99 252.85 4862.59 94.23 5336.76 500.00 2.594 58 46.58 4838.99 252.85 4862.59 94.10 5336.72 500.00 2.595 59 46.05 4838.98 248.11 4862.60 90.25 5337.03 500.00 2.595 60 45.53 4838.98 249.16 4862.60 90.96 5336.91 500.00 2.595 61 45.00 4838.98 248.64 4862.60 89.47 5345.19 508.16 2.595 62 46.05 4838.98 249.69 4862.60 91.50 5336.92 500.00 2.595 63 45.00 4838.98 250.74 4862.60 91.13 5345.05 508.16 2.595 64 45.53 4838.98 251.79 4862.60 92.08 5345.01 508.16 2.595 65 45.00 4838.98 253.90 4862.59 92.69 5353.10 516.33 2.595 66 46.05 4838.98 252.85 4862.59 93.98 5336.68 500.00 2.595 67 46.58 4838.99 250.74 4862.60 92.44 5336.88 500.00 2.596 68 45.00 4838.98 245.48 4862.60 87.94 5337.13 500.00 2.596 69 45.53 4838.98 246.01 4862.60 88.47 5337.13 500.00 2.596 70 46.58 4838.99 247.58 4862.60 89.95 5337.10 500.00 2.596 71 47.63 4838.99 252.85 4862.59 94.35 5336.80 500.00 2.597 72 45.53 4838.98 248.11 4862.60 89.17 5345.27 508.16 2.597 73 46.05 4838.98 248.64 4862.60 90.67 5336.99 500.00 2.597 74 45.00 4838.98 249.16 4862.60 89.89 5345.16 508.16 2.597 75 46.05 4838.98 246.53 4862.60 89.00 5337.14 500.00 2.597 76 46.58 4838.99 253.90 4862.59 93.99 5344.93 508.16 2.597 77 48.16 4838.99 253.90 4862.59 95.30 5336.77 500.00 2.597 78 46.05 4838.98 253.90 4862.59 93.87 5344.89 508.16 2.597 79 45.53 4838.98 246.53 4862.60 88.89 5337.10 500.00 2.597 80 45.53 4838.98 253.90 4862.59 93.75 5344.85 508.16 2.598 81 45.53 4838.98 251.27 4862.60 91.66 5345.05 508.16 2.598 82 45.00 4838.98 253.37 4862.59 92.27 5353.14 516.33 2.598 83 46.58 4838.99 250.22 4862.60 92.03 5336.92 500.00 2.598 84 46.05 4838.98 252.32 4862.59 92.62 5345.01 508.16 2.598 85 46.58 4838.99 248.11 4862.60 90.37 5337.07 500.00 2.598 86 47.11 4838.99 251.27 4862.60 92.97 5336.88 500.00 2.598 87 45.53 4838.98 248.64 4862.60 89.59 5345.23 508.16 2.598 88 46.05 4838.98 249.16 4862.60 91.08 5336.95 500.00 2.599 89 45.00 4838.98 249.69 4862.60 90.30 5345.12 508.16 2.599 90 48.16 4838.99 253.37 4862.59 94.88 5336.80 500.00 2.600 91 47.11 4838.99 247.58 4862.60 90.06 5337.14 500.00 2.600 92 46.58 4838.99 248.64 4862.60 90.78 5337.03 500.00 2.600 93 45.53 4838.98 249.16 4862.60 90.00 5345.20 508.16 2.600 94 45.00 4838.98 252.85 4862.59 91.85 5353.18 516.33 2.601 95 45.53 4838.98 250.74 4862.60 91.25 5345.08 508.16 2.601 96 45.00 4838.98 250.22 4862.60 90.72 5345.08 508.16 2.601 97 46.05 4838.98 251.79 4862.60 92.20 5345.05 508.16 2.601 98 47.63 4838.99 252.32 4862.59 93.93 5336.84 500.00 2.601 99 47.11 4838.99 250.74 4862.60 92.56 5336.92 500.00 2.601 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4838.98 XR: 253.90 YR: 4862.59 Centre: XC: 94.56 YC: 5336.52 Radius: R: 500.00 Generated failure surface: (20 points) 45.00 4838.98 56.10 4838.00 67.23 4837.27 78.37 4836.78 89.51 4836.54 100.66 4836.55 111.80 4836.81 122.94 4837.32 134.06 4838.08 145.16 4839.08 156.24 4840.34 167.29 4841.83 178.30 4843.58 189.27 4845.57 200.19 4847.80 211.06 4850.28 221.87 4853.00 232.62 4855.95 243.29 4859.15 253.90 4862.59 Slice Geometry and Properties - Critical Failure Surface (circle 1, 44 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.16 -5.1 5.00 5.02 1 50.00 25.0 133.08 72.49 28.57 1.02 2 50.00 10.65 -5.1 6.10 6.13 1 50.00 25.0 1227.99 296.33 205.41 1.02 3 56.10 22.98 -3.8 5.56 5.57 1 50.00 25.0 2651.41 455.64 482.82 1.01 4 61.67 35.28 -3.8 5.56 5.57 1 50.00 25.0 4071.59 610.69 740.94 1.01 5 67.23 47.30 -2.5 5.57 5.57 1 50.00 25.0 5459.16 743.85 987.96 1.01 6 72.80 58.94 -2.5 5.57 5.57 1 50.00 25.0 6803.02 855.60 1231.07 1.01 7 78.37 70.28 -1.2 5.57 5.57 1 50.00 25.0 8113.26 945.78 1461.33 1.00 8 83.94 81.24 -1.2 5.57 5.57 1 50.00 25.0 9379.11 1014.22 1689.32 1.00 9 89.51 91.88 0.1 5.57 5.57 1 50.00 25.0 10607.74 1061.24 1902.81 1.00 10 95.08 102.15 0.1 5.57 5.57 1 50.00 25.0 11794.42 1086.54 2115.68 1.00 11 100.66 108.88 1.3 5.42 5.42 1 50.00 25.0 12515.04 1060.87 2299.21 1.00 12 106.08 117.94 1.3 5.42 5.42 1 50.00 25.0 13416.25 1044.02 2464.70 1.00 13 111.50 128.57 2.5 5.72 5.72 1 50.00 25.0 14557.85 1063.49 2525.67 0.99 14 117.22 127.22 2.6 5.72 5.73 1 50.00 25.0 14405.82 999.19 2498.65 0.99 15 122.94 122.05 3.9 5.56 5.57 1 50.00 25.0 13821.65 889.23 2455.71 0.99 16 128.50 120.08 3.9 5.56 5.57 1 50.00 25.0 13598.64 784.95 2415.87 0.99 17 134.06 20.08 5.2 0.94 0.94 1 50.00 25.0 2274.21 121.90 2381.81 0.99 18 135.00 63.60 5.2 3.00 3.01 3 0.00 45.0 6665.74 1917.10 2167.86 0.97 19 138.00 74.90 5.2 3.58 3.60 1 50.00 25.0 9370.28 4084.26 2590.63 0.99 20 141.58 73.83 5.2 3.58 3.60 1 50.00 25.0 9245.54 4011.51 2556.04 0.99 21 145.16 24.69 6.4 1.21 1.22 1 50.00 25.0 3093.75 1340.93 2525.21 0.99 22 146.37 99.05 6.4 4.93 4.96 2 10.00 35.0 12406.43 5359.42 2471.38 0.98 23 151.31 96.48 6.4 4.93 4.96 2 10.00 35.0 12066.70 5186.88 2403.50 0.98 24 156.24 104.62 7.7 5.52 5.57 2 10.00 35.0 13061.28 5595.91 2315.62 0.97 25 161.76 100.70 7.7 5.52 5.57 2 10.00 35.0 12545.19 5335.15 2223.89 0.97 26 167.29 96.12 9.0 5.51 5.57 2 10.00 35.0 11945.84 5053.25 2116.94 0.97 27 172.79 91.54 9.0 5.51 5.57 2 10.00 35.0 11343.76 4749.94 2009.85 0.97 28 178.30 86.29 10.3 5.48 5.57 2 10.00 35.0 10657.05 4425.30 1888.29 0.97 29 183.78 81.05 10.3 5.48 5.57 2 10.00 35.0 9969.27 4079.20 1765.87 0.97 30 189.27 75.16 11.6 5.46 5.57 2 10.00 35.0 9198.88 3712.13 1629.88 0.97 31 194.73 69.28 11.6 5.46 5.57 2 10.00 35.0 8428.07 3323.90 1492.51 0.97 32 200.19 41.24 12.8 3.51 3.60 2 10.00 35.0 4986.20 1929.57 1369.34 0.97 33 203.69 38.53 12.8 3.51 3.60 2 10.00 35.0 4630.99 1750.32 1271.04 0.97 34 207.20 40.73 12.8 3.86 3.96 2 10.00 35.0 4832.31 1718.12 1204.27 0.97 35 211.06 69.96 14.1 6.74 6.95 2 10.00 35.0 8063.49 2462.04 1140.75 0.96 36 217.80 39.64 14.1 4.07 4.19 2 10.00 35.0 4442.18 1129.29 1038.31 0.96 37 221.87 46.05 15.4 5.37 5.57 2 10.00 35.0 5034.24 1065.84 883.66 0.96 38 227.24 38.54 15.4 5.37 5.57 2 10.00 35.0 4044.98 551.26 705.99 0.96 39 232.62 17.15 16.7 2.82 2.95 1 50.00 25.0 1733.03 77.80 577.67 0.99 40 235.44 20.08 16.7 3.93 4.10 1 50.00 25.0 2007.91 0.00 479.34 0.99 41 239.37 15.70 16.7 3.93 4.10 1 50.00 25.0 1569.74 0.00 373.53 0.99 42 243.29 10.77 17.9 3.80 4.00 1 50.00 25.0 1077.28 0.00 261.58 0.99 43 247.10 6.09 17.9 3.80 4.00 1 50.00 25.0 609.01 0.00 145.28 0.99 44 250.90 1.48 17.9 3.00 3.15 1 50.00 25.0 147.95 0.00 40.61 0.99 X-S Area: 2789.98 Path Length: 211.81 X-S Weight: 328007.31 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S3-Mining.gmf Processed: 22 Jan 2026 09:27:26 DATA: Analysis 1 - Slope Stability - Case S-3 - Mining Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4863.00 213.40 4863.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 136.40 4858.80 139.40 4858.80 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4856.00 136.40 4856.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 139.40 4856.00 213.40 4856.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4837.70 50.00 4837.50 136.40 4837.90 Profile: 6 (2 points) Material beneath: 1 - Clay 139.40 4837.90 213.40 4838.20 Profile: 7 (2 points) Material beneath: 1 - Clay 136.40 4834.90 139.40 4834.90 Slope Surface (13 points) 0.00 4837.70 50.00 4837.50 113.00 4858.50 136.40 4858.80 139.40 4858.80 144.40 4859.20 146.90 4858.50 156.60 4861.00 163.40 4861.20 181.00 4861.90 185.60 4860.20 189.30 4862.10 213.40 4861.60 Phreatic Surface (5 points) 0.00 4837.70 50.00 4837.50 136.40 4838.90 139.40 4856.40 213.40 4856.40 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4837.50 XR: 168.40 YR: 4861.40 Centre: XC: 51.06 YC: 5137.50 Radius: R: 300.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-3 - Mining Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 3.559 Analysis Summary There were: 15327 successful analyses from a total of 20001 trial failure surfaces 4674 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.86 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4837.52 173.40 4861.60 79.28 5009.13 175.00 2.865 <-- Critical Surface 2 45.00 4837.52 172.87 4861.58 78.90 5009.21 175.00 2.872 3 45.53 4837.52 173.40 4861.60 79.40 5009.21 175.00 2.877 4 45.00 4837.52 172.35 4861.56 78.52 5009.28 175.00 2.885 5 45.53 4837.52 172.87 4861.58 79.02 5009.28 175.00 2.885 6 45.00 4837.52 171.82 4861.54 78.15 5009.35 175.00 2.887 7 46.05 4837.52 173.40 4861.60 79.52 5009.29 175.00 2.889 8 45.53 4837.52 172.35 4861.56 78.64 5009.36 175.00 2.893 9 45.00 4837.52 171.29 4861.51 77.77 5009.42 175.00 2.895 10 46.05 4837.52 172.87 4861.58 79.14 5009.36 175.00 2.898 11 45.53 4837.52 171.82 4861.54 78.27 5009.43 175.00 2.900 12 45.00 4837.52 170.77 4861.49 77.39 5009.50 175.00 2.902 13 46.58 4837.51 173.40 4861.60 79.64 5009.36 175.00 2.902 14 46.05 4837.52 172.35 4861.56 78.76 5009.43 175.00 2.905 15 45.53 4837.52 171.29 4861.51 77.89 5009.50 175.00 2.907 16 45.00 4837.52 170.24 4861.47 77.01 5009.57 175.00 2.909 17 45.00 4837.52 173.40 4861.60 78.27 5014.52 180.10 2.911 18 46.05 4837.52 171.82 4861.54 78.38 5009.50 175.00 2.912 19 45.00 4837.52 169.72 4861.45 76.63 5009.64 175.00 2.913 20 46.58 4837.51 172.87 4861.58 79.26 5009.43 175.00 2.914 21 45.53 4837.52 170.77 4861.49 77.51 5009.57 175.00 2.914 22 46.58 4837.51 172.35 4861.56 78.88 5009.51 175.00 2.918 23 45.00 4837.52 172.87 4861.58 77.89 5014.59 180.10 2.919 24 46.05 4837.52 171.29 4861.51 78.00 5009.57 175.00 2.919 25 45.53 4837.52 170.24 4861.47 77.12 5009.64 175.00 2.921 26 47.11 4837.51 173.40 4861.60 79.76 5009.44 175.00 2.921 27 45.00 4837.52 169.19 4861.43 76.25 5009.71 175.00 2.922 28 45.53 4837.52 173.40 4861.60 78.38 5014.60 180.10 2.923 29 47.11 4837.51 172.87 4861.58 79.38 5009.51 175.00 2.923 30 46.58 4837.51 171.82 4861.54 78.50 5009.58 175.00 2.925 31 45.00 4837.52 172.35 4861.56 77.51 5014.66 180.10 2.926 32 46.05 4837.52 170.77 4861.49 77.62 5009.64 175.00 2.926 33 45.53 4837.52 169.72 4861.45 76.74 5009.71 175.00 2.926 34 45.00 4837.52 168.66 4861.41 75.86 5009.78 175.00 2.929 35 47.11 4837.51 172.35 4861.56 79.00 5009.58 175.00 2.930 36 45.53 4837.52 172.87 4861.58 78.01 5014.67 180.10 2.931 37 46.58 4837.51 171.29 4861.51 78.12 5009.65 175.00 2.931 38 46.05 4837.52 170.24 4861.47 77.24 5009.71 175.00 2.932 39 45.00 4837.52 171.82 4861.54 77.13 5014.73 180.10 2.932 40 45.53 4837.52 169.19 4861.43 76.36 5009.78 175.00 2.934 41 46.05 4837.52 173.40 4861.60 78.50 5014.67 180.10 2.935 42 45.00 4837.52 168.14 4861.39 75.48 5009.85 175.00 2.935 43 47.63 4837.51 172.87 4861.58 79.50 5009.58 175.00 2.936 44 47.11 4837.51 171.82 4861.54 78.62 5009.65 175.00 2.937 45 45.53 4837.52 172.35 4861.56 77.62 5014.74 180.10 2.938 46 46.58 4837.51 170.77 4861.49 77.74 5009.72 175.00 2.938 47 47.63 4837.51 173.40 4861.60 79.88 5009.51 175.00 2.938 48 46.05 4837.52 169.72 4861.45 76.86 5009.78 175.00 2.939 49 45.00 4837.52 171.29 4861.51 76.75 5014.80 180.10 2.939 50 45.53 4837.52 168.66 4861.41 75.98 5009.85 175.00 2.940 51 46.05 4837.52 169.19 4861.43 76.47 5009.85 175.00 2.941 52 45.00 4837.52 167.61 4861.37 75.09 5009.91 175.00 2.941 53 47.63 4837.51 172.35 4861.56 79.12 5009.65 175.00 2.942 54 46.05 4837.52 172.87 4861.58 78.12 5014.74 180.10 2.943 55 47.11 4837.51 171.29 4861.51 78.24 5009.72 175.00 2.943 56 45.53 4837.52 171.82 4861.54 77.24 5014.81 180.10 2.944 57 46.58 4837.51 170.24 4861.47 77.36 5009.79 175.00 2.944 58 48.16 4837.51 173.40 4861.60 80.00 5009.59 175.00 2.945 59 45.00 4837.52 170.77 4861.49 76.36 5014.87 180.10 2.946 60 45.53 4837.52 168.14 4861.39 75.59 5009.92 175.00 2.946 61 46.58 4837.51 173.40 4861.60 78.62 5014.74 180.10 2.947 62 47.63 4837.51 171.82 4861.54 78.73 5009.72 175.00 2.949 63 46.05 4837.52 172.35 4861.56 77.74 5014.81 180.10 2.949 64 47.11 4837.51 170.77 4861.49 77.85 5009.79 175.00 2.950 65 45.00 4837.52 167.08 4861.35 74.71 5009.98 175.00 2.950 66 46.58 4837.51 169.72 4861.45 76.97 5009.85 175.00 2.950 67 45.53 4837.52 171.29 4861.51 76.86 5014.87 180.10 2.951 68 46.05 4837.52 168.66 4861.41 76.09 5009.92 175.00 2.951 69 45.00 4837.52 170.24 4861.47 75.98 5014.94 180.10 2.952 70 45.53 4837.52 167.61 4861.37 75.21 5009.98 175.00 2.952 71 48.68 4837.51 173.40 4861.60 80.11 5009.66 175.00 2.953 72 46.58 4837.51 169.19 4861.43 76.59 5009.92 175.00 2.954 73 46.58 4837.51 172.87 4861.58 78.24 5014.81 180.10 2.954 74 45.00 4837.52 169.72 4861.45 75.60 5015.00 180.10 2.955 75 48.16 4837.51 172.35 4861.56 79.23 5009.73 175.00 2.955 76 45.00 4837.52 173.40 4861.60 77.26 5019.89 185.20 2.955 77 47.63 4837.51 171.29 4861.51 78.35 5009.79 175.00 2.955 78 48.16 4837.51 172.87 4861.58 79.61 5009.66 175.00 2.955 79 46.05 4837.52 171.82 4861.54 77.36 5014.88 180.10 2.956 80 47.11 4837.51 170.24 4861.47 77.47 5009.86 175.00 2.956 81 45.53 4837.52 170.77 4861.49 76.48 5014.94 180.10 2.957 82 46.05 4837.52 168.14 4861.39 75.70 5009.99 175.00 2.957 83 45.00 4837.52 166.56 4861.33 74.32 5010.05 175.00 2.957 84 47.11 4837.51 173.40 4861.60 78.74 5014.81 180.10 2.959 85 45.00 4837.52 166.03 4861.30 73.94 5010.11 175.00 2.960 86 46.58 4837.51 172.35 4861.56 77.86 5014.88 180.10 2.961 87 48.16 4837.51 171.82 4861.54 78.85 5009.80 175.00 2.961 88 47.63 4837.51 170.77 4861.49 77.97 5009.86 175.00 2.962 89 45.00 4837.52 172.87 4861.58 76.88 5019.96 185.20 2.962 90 47.11 4837.51 169.72 4861.45 77.08 5009.92 175.00 2.962 91 46.05 4837.52 171.29 4861.51 76.97 5014.94 180.10 2.962 92 46.58 4837.51 168.66 4861.41 76.20 5009.99 175.00 2.962 93 45.53 4837.52 170.24 4861.47 76.09 5015.01 180.10 2.963 94 45.53 4837.52 167.08 4861.35 74.82 5010.05 175.00 2.963 95 45.00 4837.52 169.19 4861.43 75.21 5015.07 180.10 2.964 96 45.53 4837.52 166.56 4861.33 74.43 5010.11 175.00 2.964 97 49.21 4837.50 173.40 4861.60 80.23 5009.73 175.00 2.965 98 48.68 4837.51 172.87 4861.58 79.73 5009.73 175.00 2.965 99 47.11 4837.51 169.19 4861.43 76.70 5009.99 175.00 2.966 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4837.52 XR: 173.40 YR: 4861.60 Centre: XC: 79.28 YC: 5009.13 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4837.52 51.94 4836.28 58.92 4835.32 65.93 4834.64 72.96 4834.24 80.01 4834.13 87.05 4834.30 94.08 4834.76 101.09 4835.50 108.06 4836.51 114.99 4837.81 121.85 4839.39 128.65 4841.24 135.37 4843.36 142.00 4845.76 148.52 4848.41 154.94 4851.33 161.23 4854.50 167.39 4857.93 173.40 4861.60 Slice Geometry and Properties - Critical Failure Surface (circle 1, 47 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.55 -10.1 2.50 2.54 1 50.00 25.0 62.89 34.67 28.72 1.05 2 47.50 1.64 -10.1 2.50 2.54 1 50.00 25.0 188.53 103.92 79.66 1.05 3 50.00 2.65 -10.1 1.94 1.97 1 50.00 25.0 305.31 130.44 163.68 1.05 4 51.94 9.38 -7.8 3.49 3.52 1 50.00 25.0 1081.06 334.26 317.14 1.03 5 55.43 15.12 -7.8 3.49 3.52 1 50.00 25.0 1742.63 452.21 510.27 1.03 6 58.92 20.71 -5.5 3.51 3.52 1 50.00 25.0 2388.54 554.83 691.27 1.02 7 62.42 26.00 -5.5 3.51 3.52 1 50.00 25.0 2998.89 641.88 867.73 1.02 8 65.93 31.15 -3.2 3.52 3.52 1 50.00 25.0 3592.59 713.48 1029.94 1.01 9 69.45 35.97 -3.2 3.52 3.52 1 50.00 25.0 4148.96 769.52 1189.46 1.01 10 72.96 40.60 -0.9 3.52 3.52 1 50.00 25.0 4683.76 809.86 1332.84 1.00 11 76.49 44.93 -0.9 3.52 3.52 1 50.00 25.0 5184.39 834.87 1475.32 1.00 12 80.01 49.01 1.4 3.52 3.52 1 50.00 25.0 5655.23 844.11 1599.92 1.00 13 83.53 52.84 1.4 3.52 3.52 1 50.00 25.0 6098.15 837.89 1725.21 1.00 14 87.05 56.32 3.7 3.52 3.52 1 50.00 25.0 6500.14 815.98 1831.04 0.99 15 90.57 59.64 3.7 3.52 3.52 1 50.00 25.0 6884.28 778.52 1939.02 0.99 16 94.08 62.49 6.0 3.50 3.52 1 50.00 25.0 7214.18 725.50 2026.08 0.99 17 97.59 65.29 6.0 3.50 3.52 1 50.00 25.0 7538.51 657.02 2116.77 0.99 18 101.09 42.42 8.3 2.20 2.23 1 50.00 25.0 4898.77 373.96 2171.57 0.99 19 103.30 43.33 8.3 2.20 2.23 1 50.00 25.0 5004.22 334.10 2217.88 0.99 20 105.50 51.49 8.3 2.56 2.59 1 50.00 25.0 5930.71 338.12 2261.65 0.99 21 108.06 50.66 10.6 2.47 2.51 1 50.00 25.0 5804.93 268.88 2281.48 0.99 22 110.53 51.55 10.6 2.47 2.51 1 50.00 25.0 5877.70 202.60 2309.30 0.99 23 113.00 40.18 10.6 1.92 1.96 1 50.00 25.0 4569.22 111.83 2304.20 0.99 24 114.92 71.92 12.9 3.54 3.63 2 10.00 35.0 8155.46 85.30 2185.25 0.97 25 118.46 66.54 12.9 3.40 3.48 2 10.00 35.0 7519.85 0.00 2095.94 0.97 26 121.85 63.85 15.2 3.40 3.52 2 10.00 35.0 7208.14 0.00 1987.35 0.97 27 125.25 60.85 15.2 3.40 3.52 2 10.00 35.0 6861.02 0.00 1891.60 0.97 28 128.65 56.94 17.5 3.36 3.52 2 10.00 35.0 6410.93 0.00 1770.68 0.97 29 132.01 53.52 17.5 3.36 3.52 2 10.00 35.0 6015.12 0.00 1661.24 0.97 30 135.37 15.69 19.8 1.03 1.09 2 10.00 35.0 1761.41 0.00 1571.19 0.98 31 136.40 13.17 19.8 0.88 0.94 3 0.00 45.0 1317.04 0.00 1323.75 0.94 32 137.28 30.40 19.9 2.12 2.25 3 0.00 45.0 3162.34 813.02 1367.43 0.94 33 139.40 35.37 19.9 2.60 2.76 2 10.00 35.0 4387.70 1915.18 1607.10 0.98 34 142.00 30.89 22.2 2.40 2.59 2 10.00 35.0 3806.18 1643.41 1497.12 0.98 35 144.40 29.02 22.2 2.50 2.70 2 10.00 35.0 3573.33 1542.27 1350.37 0.98 36 146.90 17.25 22.2 1.62 1.75 2 10.00 35.0 2120.23 909.65 1233.55 0.98 37 148.52 32.67 24.5 3.21 3.52 2 10.00 35.0 3945.98 1595.20 1151.32 0.99 38 151.73 30.65 24.5 3.21 3.52 2 10.00 35.0 3603.08 1274.67 1045.95 0.99 39 154.94 15.03 26.8 1.66 1.86 2 10.00 35.0 1724.89 540.47 953.47 1.00 40 156.60 19.16 26.8 2.31 2.59 2 10.00 35.0 2154.93 589.59 852.56 1.00 41 158.91 16.61 26.8 2.31 2.59 2 10.00 35.0 1819.65 400.85 715.58 1.00 42 161.23 13.17 29.1 2.17 2.49 2 10.00 35.0 1387.72 200.34 570.22 1.01 43 163.40 2.77 29.1 0.52 0.59 2 10.00 35.0 282.01 20.06 482.72 1.01 44 163.92 3.62 29.1 0.72 0.82 1 50.00 25.0 364.22 10.25 456.56 1.05 45 164.64 11.38 29.1 2.75 3.15 1 50.00 25.0 1138.07 0.00 370.70 1.05 46 167.39 7.74 31.4 3.01 3.52 1 50.00 25.0 773.59 0.00 224.31 1.07 47 170.39 2.58 31.4 3.01 3.52 1 50.00 25.0 258.01 0.00 68.36 1.07 X-S Area: 1554.68 Path Length: 133.87 X-S Weight: 178104.55 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S3-Mining-EQ.gmf Processed: 22 Jan 2026 09:27:59 DATA: Analysis 1 - Slope Stability - Case S-3 - Mining Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4863.00 213.40 4863.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 136.40 4858.80 139.40 4858.80 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4856.00 136.40 4856.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 139.40 4856.00 213.40 4856.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4837.70 50.00 4837.50 136.40 4837.90 Profile: 6 (2 points) Material beneath: 1 - Clay 139.40 4837.90 213.40 4838.20 Profile: 7 (2 points) Material beneath: 1 - Clay 136.40 4834.90 139.40 4834.90 Slope Surface (13 points) 0.00 4837.70 50.00 4837.50 113.00 4858.50 136.40 4858.80 139.40 4858.80 144.40 4859.20 146.90 4858.50 156.60 4861.00 163.40 4861.20 181.00 4861.90 185.60 4860.20 189.30 4862.10 213.40 4861.60 Phreatic Surface (5 points) 0.00 4837.70 50.00 4837.50 136.40 4838.90 139.40 4856.40 213.40 4856.40 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4837.50 XR: 168.40 YR: 4861.40 Centre: XC: 51.06 YC: 5137.50 Radius: R: 300.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-3 - Mining Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.582 Analysis Summary There were: 15327 successful analyses from a total of 20001 trial failure surfaces 4674 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.06 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4837.52 173.40 4861.60 79.28 5009.13 175.00 2.058 <-- Critical Surface 2 45.00 4837.52 172.87 4861.58 78.90 5009.21 175.00 2.066 3 45.53 4837.52 173.40 4861.60 79.40 5009.21 175.00 2.066 4 45.53 4837.52 172.87 4861.58 79.02 5009.28 175.00 2.074 5 46.05 4837.52 173.40 4861.60 79.52 5009.29 175.00 2.075 6 45.00 4837.52 172.35 4861.56 78.52 5009.28 175.00 2.077 7 45.00 4837.52 171.82 4861.54 78.15 5009.35 175.00 2.080 8 45.53 4837.52 172.35 4861.56 78.64 5009.36 175.00 2.082 9 46.05 4837.52 172.87 4861.58 79.14 5009.36 175.00 2.083 10 46.58 4837.51 173.40 4861.60 79.64 5009.36 175.00 2.083 11 45.00 4837.52 171.29 4861.51 77.77 5009.42 175.00 2.088 12 45.53 4837.52 171.82 4861.54 78.27 5009.43 175.00 2.089 13 46.05 4837.52 172.35 4861.56 78.76 5009.43 175.00 2.090 14 45.00 4837.52 173.40 4861.60 78.27 5014.52 180.10 2.091 15 46.58 4837.51 172.87 4861.58 79.26 5009.43 175.00 2.094 16 45.00 4837.52 170.77 4861.49 77.39 5009.50 175.00 2.095 17 45.53 4837.52 171.29 4861.51 77.89 5009.50 175.00 2.096 18 47.11 4837.51 173.40 4861.60 79.76 5009.44 175.00 2.096 19 46.05 4837.52 171.82 4861.54 78.38 5009.50 175.00 2.097 20 46.58 4837.51 172.35 4861.56 78.88 5009.51 175.00 2.098 21 45.00 4837.52 172.87 4861.58 77.89 5014.59 180.10 2.099 22 45.53 4837.52 173.40 4861.60 78.38 5014.60 180.10 2.099 23 47.11 4837.51 172.87 4861.58 79.38 5009.51 175.00 2.100 24 45.00 4837.52 170.24 4861.47 77.01 5009.57 175.00 2.102 25 45.53 4837.52 170.77 4861.49 77.51 5009.57 175.00 2.103 26 46.05 4837.52 171.29 4861.51 78.00 5009.57 175.00 2.104 27 46.58 4837.51 171.82 4861.54 78.50 5009.58 175.00 2.106 28 45.00 4837.52 172.35 4861.56 77.51 5014.66 180.10 2.106 29 45.53 4837.52 172.87 4861.58 78.01 5014.67 180.10 2.107 30 47.11 4837.51 172.35 4861.56 79.00 5009.58 175.00 2.107 31 45.00 4837.52 169.72 4861.45 76.63 5009.64 175.00 2.107 32 46.05 4837.52 173.40 4861.60 78.50 5014.67 180.10 2.108 33 47.63 4837.51 173.40 4861.60 79.88 5009.51 175.00 2.108 34 47.63 4837.51 172.87 4861.58 79.50 5009.58 175.00 2.108 35 45.53 4837.52 170.24 4861.47 77.12 5009.64 175.00 2.110 36 46.05 4837.52 170.77 4861.49 77.62 5009.64 175.00 2.111 37 48.16 4837.51 173.40 4861.60 80.00 5009.59 175.00 2.112 38 46.58 4837.51 171.29 4861.51 78.12 5009.65 175.00 2.112 39 45.00 4837.52 171.82 4861.54 77.13 5014.73 180.10 2.113 40 47.11 4837.51 171.82 4861.54 78.62 5009.65 175.00 2.114 41 45.53 4837.52 172.35 4861.56 77.62 5014.74 180.10 2.114 42 46.05 4837.52 172.87 4861.58 78.12 5014.74 180.10 2.115 43 47.63 4837.51 172.35 4861.56 79.12 5009.65 175.00 2.115 44 45.00 4837.52 169.19 4861.43 76.25 5009.71 175.00 2.116 45 46.58 4837.51 173.40 4861.60 78.62 5014.74 180.10 2.116 46 45.53 4837.52 169.72 4861.45 76.74 5009.71 175.00 2.116 47 48.68 4837.51 173.40 4861.60 80.11 5009.66 175.00 2.117 48 46.05 4837.52 170.24 4861.47 77.24 5009.71 175.00 2.118 49 46.58 4837.51 170.77 4861.49 77.74 5009.72 175.00 2.119 50 45.00 4837.52 171.29 4861.51 76.75 5014.80 180.10 2.120 51 47.11 4837.51 171.29 4861.51 78.24 5009.72 175.00 2.121 52 45.53 4837.52 171.82 4861.54 77.24 5014.81 180.10 2.121 53 48.16 4837.51 172.87 4861.58 79.61 5009.66 175.00 2.121 54 46.05 4837.52 172.35 4861.56 77.74 5014.81 180.10 2.122 55 47.63 4837.51 171.82 4861.54 78.73 5009.72 175.00 2.122 56 45.00 4837.52 168.66 4861.41 75.86 5009.78 175.00 2.122 57 46.58 4837.51 172.87 4861.58 78.24 5014.81 180.10 2.123 58 45.00 4837.52 173.40 4861.60 77.26 5019.89 185.20 2.123 59 48.16 4837.51 172.35 4861.56 79.23 5009.73 175.00 2.123 60 45.53 4837.52 169.19 4861.43 76.36 5009.78 175.00 2.123 61 47.11 4837.51 173.40 4861.60 78.74 5014.81 180.10 2.124 62 46.05 4837.52 169.72 4861.45 76.86 5009.78 175.00 2.125 63 49.21 4837.50 173.40 4861.60 80.23 5009.73 175.00 2.126 64 46.58 4837.51 170.24 4861.47 77.36 5009.79 175.00 2.126 65 45.00 4837.52 170.77 4861.49 76.36 5014.87 180.10 2.126 66 47.11 4837.51 170.77 4861.49 77.85 5009.79 175.00 2.127 67 45.53 4837.52 171.29 4861.51 76.86 5014.87 180.10 2.128 68 48.68 4837.51 172.87 4861.58 79.73 5009.73 175.00 2.128 69 46.05 4837.52 169.19 4861.43 76.47 5009.85 175.00 2.128 70 46.05 4837.52 171.82 4861.54 77.36 5014.88 180.10 2.128 71 47.63 4837.51 171.29 4861.51 78.35 5009.79 175.00 2.129 72 45.00 4837.52 168.14 4861.39 75.48 5009.85 175.00 2.129 73 46.58 4837.51 172.35 4861.56 77.86 5014.88 180.10 2.130 74 45.00 4837.52 172.87 4861.58 76.88 5019.96 185.20 2.130 75 45.53 4837.52 168.66 4861.41 75.98 5009.85 175.00 2.130 76 48.16 4837.51 171.82 4861.54 78.85 5009.80 175.00 2.130 77 45.53 4837.52 173.40 4861.60 77.37 5019.96 185.20 2.131 78 47.11 4837.51 172.87 4861.58 78.35 5014.88 180.10 2.131 79 48.68 4837.51 172.35 4861.56 79.35 5009.80 175.00 2.132 80 46.58 4837.51 169.72 4861.45 76.97 5009.85 175.00 2.132 81 45.00 4837.52 170.24 4861.47 75.98 5014.94 180.10 2.133 82 49.74 4837.50 173.40 4861.60 80.34 5009.80 175.00 2.134 83 47.11 4837.51 170.24 4861.47 77.47 5009.86 175.00 2.134 84 45.53 4837.52 170.77 4861.49 76.48 5014.94 180.10 2.134 85 49.21 4837.50 172.87 4861.58 79.84 5009.80 175.00 2.135 86 46.05 4837.52 171.29 4861.51 76.97 5014.94 180.10 2.135 87 47.63 4837.51 170.77 4861.49 77.97 5009.86 175.00 2.135 88 47.63 4837.51 173.40 4861.60 78.85 5014.89 180.10 2.135 89 45.00 4837.52 167.61 4861.37 75.09 5009.91 175.00 2.135 90 46.58 4837.51 171.82 4861.54 77.47 5014.95 180.10 2.136 91 45.53 4837.52 168.14 4861.39 75.59 5009.92 175.00 2.136 92 45.00 4837.52 172.35 4861.56 76.50 5020.03 185.20 2.137 93 48.16 4837.51 171.29 4861.51 78.46 5009.86 175.00 2.137 94 46.58 4837.51 169.19 4861.43 76.59 5009.92 175.00 2.137 95 45.00 4837.52 169.72 4861.45 75.60 5015.00 180.10 2.137 96 46.05 4837.52 168.66 4861.41 76.09 5009.92 175.00 2.137 97 47.11 4837.51 172.35 4861.56 77.97 5014.95 180.10 2.138 98 45.53 4837.52 172.87 4861.58 76.99 5020.03 185.20 2.138 99 48.68 4837.51 171.82 4861.54 78.96 5009.87 175.00 2.138 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4837.52 XR: 173.40 YR: 4861.60 Centre: XC: 79.28 YC: 5009.13 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4837.52 51.94 4836.28 58.92 4835.32 65.93 4834.64 72.96 4834.24 80.01 4834.13 87.05 4834.30 94.08 4834.76 101.09 4835.50 108.06 4836.51 114.99 4837.81 121.85 4839.39 128.65 4841.24 135.37 4843.36 142.00 4845.76 148.52 4848.41 154.94 4851.33 161.23 4854.50 167.39 4857.93 173.40 4861.60 Slice Geometry and Properties - Critical Failure Surface (circle 1, 47 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.55 -10.1 2.50 2.54 1 50.00 25.0 62.89 34.67 30.17 1.06 2 47.50 1.64 -10.1 2.50 2.54 1 50.00 25.0 188.53 103.92 81.40 1.06 3 50.00 2.65 -10.1 1.94 1.97 1 50.00 25.0 305.31 130.44 166.11 1.06 4 51.94 9.38 -7.8 3.49 3.52 1 50.00 25.0 1081.06 334.26 320.13 1.04 5 55.43 15.12 -7.8 3.49 3.52 1 50.00 25.0 1742.63 452.21 514.70 1.04 6 58.92 20.71 -5.5 3.51 3.52 1 50.00 25.0 2388.54 554.83 695.32 1.03 7 62.42 26.00 -5.5 3.51 3.52 1 50.00 25.0 2998.89 641.88 872.73 1.03 8 65.93 31.15 -3.2 3.52 3.52 1 50.00 25.0 3592.59 713.48 1033.34 1.01 9 69.45 35.97 -3.2 3.52 3.52 1 50.00 25.0 4148.96 769.52 1193.39 1.01 10 72.96 40.60 -0.9 3.52 3.52 1 50.00 25.0 4683.76 809.86 1334.07 1.00 11 76.49 44.93 -0.9 3.52 3.52 1 50.00 25.0 5184.39 834.87 1476.69 1.00 12 80.01 49.01 1.4 3.52 3.52 1 50.00 25.0 5655.23 844.11 1597.64 0.99 13 83.53 52.84 1.4 3.52 3.52 1 50.00 25.0 6098.15 837.89 1722.76 0.99 14 87.05 56.32 3.7 3.52 3.52 1 50.00 25.0 6500.14 815.98 1824.10 0.99 15 90.57 59.64 3.7 3.52 3.52 1 50.00 25.0 6884.28 778.52 1931.59 0.99 16 94.08 62.49 6.0 3.50 3.52 1 50.00 25.0 7214.18 725.50 2013.45 0.98 17 97.59 65.29 6.0 3.50 3.52 1 50.00 25.0 7538.51 657.02 2103.41 0.98 18 101.09 42.42 8.3 2.20 2.23 1 50.00 25.0 4898.77 373.96 2152.52 0.98 19 103.30 43.33 8.3 2.20 2.23 1 50.00 25.0 5004.22 334.10 2198.25 0.98 20 105.50 51.49 8.3 2.56 2.59 1 50.00 25.0 5930.71 338.12 2241.44 0.98 21 108.06 50.66 10.6 2.47 2.51 1 50.00 25.0 5804.93 268.88 2255.30 0.98 22 110.53 51.55 10.6 2.47 2.51 1 50.00 25.0 5877.70 202.60 2282.50 0.98 23 113.00 40.18 10.6 1.92 1.96 1 50.00 25.0 4569.22 111.83 2277.20 0.98 24 114.92 71.92 12.9 3.54 3.63 2 10.00 35.0 8155.46 85.30 2140.98 0.95 25 118.46 66.54 12.9 3.40 3.48 2 10.00 35.0 7519.85 0.00 2052.90 0.95 26 121.85 63.85 15.2 3.40 3.52 2 10.00 35.0 7208.14 0.00 1939.55 0.95 27 125.25 60.85 15.2 3.40 3.52 2 10.00 35.0 6861.02 0.00 1846.09 0.95 28 128.65 56.94 17.5 3.36 3.52 2 10.00 35.0 6410.93 0.00 1721.88 0.95 29 132.01 53.52 17.5 3.36 3.52 2 10.00 35.0 6015.12 0.00 1615.42 0.95 30 135.37 15.69 19.8 1.03 1.09 2 10.00 35.0 1761.41 0.00 1522.36 0.95 31 136.40 13.17 19.8 0.88 0.94 3 0.00 45.0 1317.04 0.00 1268.14 0.90 32 137.28 30.40 19.9 2.12 2.25 3 0.00 45.0 3162.34 813.02 1325.14 0.90 33 139.40 35.37 19.9 2.60 2.76 2 10.00 35.0 4387.70 1915.18 1578.51 0.95 34 142.00 30.89 22.2 2.40 2.59 2 10.00 35.0 3806.18 1643.41 1467.05 0.95 35 144.40 29.02 22.2 2.50 2.70 2 10.00 35.0 3573.33 1542.27 1323.19 0.95 36 146.90 17.25 22.2 1.62 1.75 2 10.00 35.0 2120.23 909.65 1208.57 0.95 37 148.52 32.67 24.5 3.21 3.52 2 10.00 35.0 3945.98 1595.20 1124.42 0.95 38 151.73 30.65 24.5 3.21 3.52 2 10.00 35.0 3603.08 1274.67 1019.58 0.95 39 154.94 15.03 26.8 1.66 1.86 2 10.00 35.0 1724.89 540.47 925.52 0.96 40 156.60 19.16 26.8 2.31 2.59 2 10.00 35.0 2154.93 589.59 826.18 0.96 41 158.91 16.61 26.8 2.31 2.59 2 10.00 35.0 1819.65 400.85 691.85 0.96 42 161.23 13.17 29.1 2.17 2.49 2 10.00 35.0 1387.72 200.34 547.65 0.96 43 163.40 2.77 29.1 0.52 0.59 2 10.00 35.0 282.01 20.06 461.96 0.96 44 163.92 3.62 29.1 0.72 0.82 1 50.00 25.0 364.22 10.25 439.19 1.02 45 164.64 11.38 29.1 2.75 3.15 1 50.00 25.0 1138.07 0.00 355.64 1.02 46 167.39 7.74 31.4 3.01 3.52 1 50.00 25.0 773.59 0.00 212.97 1.03 47 170.39 2.58 31.4 3.01 3.52 1 50.00 25.0 258.01 0.00 62.35 1.03 X-S Area: 1554.68 Path Length: 133.87 X-S Weight: 178104.55 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S4-Mining.gmf Processed: 22 Jan 2026 09:28:25 DATA: Analysis 1 - Slope Stability - Case S-4 - Mining Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4862.00 266.60 4862.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 140.20 4859.00 143.20 4859.00 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4857.00 140.20 4857.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 143.20 4857.00 266.60 4857.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4837.10 50.00 4836.90 140.20 4836.80 Profile: 6 (2 points) Material beneath: 1 - Clay 143.20 4836.80 266.60 4836.60 Profile: 7 (2 points) Material beneath: 1 - Clay 140.20 4833.80 143.20 4833.80 Slope Surface (12 points) 0.00 4837.10 50.00 4836.90 116.70 4859.10 140.20 4859.00 143.20 4859.00 185.80 4858.90 198.10 4859.70 206.90 4861.50 212.80 4861.50 216.60 4860.60 224.60 4859.30 266.60 4859.00 Phreatic Surface (5 points) 0.00 4837.10 50.00 4836.90 140.20 4837.90 143.20 4856.80 266.60 4856.80 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4836.90 XR: 221.60 YR: 4859.79 Centre: XC: 70.69 YC: 5336.47 Radius: R: 500.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 300.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-4 - Mining Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 4.542 Analysis Summary There were: 18883 successful analyses from a total of 20001 trial failure surfaces 1118 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 3.65 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4836.92 225.02 4859.30 93.31 5183.57 350.00 3.646 <-- Critical Surface 2 45.00 4836.92 223.97 4859.40 92.33 5183.70 350.00 3.648 3 45.00 4836.92 224.49 4859.32 92.88 5183.63 350.00 3.649 4 45.00 4836.92 223.44 4859.49 91.78 5183.78 350.00 3.653 5 45.00 4836.92 225.55 4859.29 93.71 5183.51 350.00 3.654 6 45.53 4836.92 225.02 4859.30 93.44 5183.62 350.00 3.655 7 45.00 4836.92 222.92 4859.57 91.23 5183.85 350.00 3.660 8 45.53 4836.92 223.97 4859.40 92.46 5183.76 350.00 3.661 9 45.53 4836.92 225.55 4859.29 93.84 5183.57 350.00 3.663 10 45.00 4836.92 226.07 4859.29 94.11 5183.46 350.00 3.663 11 45.53 4836.92 223.44 4859.49 91.91 5183.83 350.00 3.665 12 46.05 4836.92 225.02 4859.30 93.57 5183.67 350.00 3.666 13 46.05 4836.92 224.49 4859.32 93.14 5183.73 350.00 3.668 14 45.53 4836.92 224.49 4859.32 93.01 5183.68 350.00 3.668 15 45.00 4836.92 222.39 4859.66 90.67 5183.93 350.00 3.669 16 45.53 4836.92 222.92 4859.57 91.35 5183.91 350.00 3.672 17 46.05 4836.92 225.55 4859.29 93.97 5183.62 350.00 3.672 18 45.53 4836.92 226.07 4859.29 94.24 5183.51 350.00 3.672 19 45.00 4836.92 226.60 4859.29 94.50 5183.40 350.00 3.672 20 46.05 4836.92 223.97 4859.40 92.59 5183.81 350.00 3.673 21 45.00 4836.92 221.34 4859.83 89.55 5184.07 350.00 3.674 22 45.00 4836.92 226.07 4859.29 93.33 5189.75 356.12 3.675 23 45.00 4836.92 225.02 4859.30 92.53 5189.86 356.12 3.675 24 45.53 4836.92 222.39 4859.66 90.79 5183.98 350.00 3.677 25 45.00 4836.92 225.55 4859.29 92.93 5189.80 356.12 3.677 26 46.05 4836.92 223.44 4859.49 92.03 5183.88 350.00 3.678 27 45.00 4836.92 224.49 4859.32 92.10 5189.91 356.12 3.678 28 45.00 4836.92 221.86 4859.74 90.11 5184.00 350.00 3.680 29 46.58 4836.91 225.55 4859.29 94.10 5183.67 350.00 3.680 30 46.05 4836.92 226.07 4859.29 94.37 5183.56 350.00 3.681 31 46.58 4836.91 224.49 4859.32 93.27 5183.79 350.00 3.681 32 45.53 4836.92 226.60 4859.29 94.64 5183.46 350.00 3.681 33 47.11 4836.91 225.55 4859.29 94.23 5183.72 350.00 3.682 34 45.00 4836.92 220.81 4859.92 88.99 5184.14 350.00 3.683 35 46.58 4836.91 226.07 4859.29 94.50 5183.62 350.00 3.683 36 45.53 4836.92 226.07 4859.29 93.46 5189.80 356.12 3.683 37 45.00 4836.92 226.60 4859.29 93.73 5189.69 356.12 3.683 38 46.05 4836.92 222.92 4859.57 91.48 5183.96 350.00 3.684 39 46.05 4836.92 226.60 4859.29 94.77 5183.51 350.00 3.684 40 45.00 4836.92 223.97 4859.40 91.54 5189.99 356.12 3.684 41 46.58 4836.91 225.02 4859.30 93.70 5183.73 350.00 3.684 42 46.58 4836.91 223.97 4859.40 92.71 5183.86 350.00 3.686 43 45.00 4836.92 220.28 4860.00 88.43 5184.21 350.00 3.686 44 45.53 4836.92 221.86 4859.74 90.24 5184.05 350.00 3.687 45 45.53 4836.92 225.02 4859.30 92.66 5189.91 356.12 3.687 46 46.05 4836.92 222.39 4859.66 90.92 5184.03 350.00 3.688 47 45.00 4836.92 223.44 4859.49 90.99 5190.06 356.12 3.689 48 46.58 4836.91 223.44 4859.49 92.16 5183.93 350.00 3.690 49 45.53 4836.92 224.49 4859.32 92.23 5189.97 356.12 3.691 50 45.53 4836.92 220.81 4859.92 89.11 5184.19 350.00 3.692 51 45.53 4836.92 226.60 4859.29 93.86 5189.75 356.12 3.692 52 47.11 4836.91 224.49 4859.32 93.40 5183.84 350.00 3.694 53 46.05 4836.92 226.60 4859.29 93.99 5189.80 356.12 3.694 54 46.05 4836.92 221.86 4859.74 90.36 5184.10 350.00 3.695 55 47.11 4836.91 226.07 4859.29 94.63 5183.67 350.00 3.695 56 46.05 4836.92 226.07 4859.29 93.59 5189.85 356.12 3.695 57 47.63 4836.91 225.02 4859.30 93.96 5183.83 350.00 3.695 58 46.58 4836.91 226.60 4859.29 94.90 5183.56 350.00 3.696 59 45.00 4836.92 222.92 4859.57 90.43 5190.13 356.12 3.696 60 45.53 4836.92 225.55 4859.29 93.06 5189.85 356.12 3.696 61 46.58 4836.91 222.92 4859.57 91.60 5184.01 350.00 3.696 62 45.53 4836.92 223.97 4859.40 91.67 5190.04 356.12 3.696 63 46.05 4836.92 225.55 4859.29 93.19 5189.90 356.12 3.696 64 45.00 4836.92 219.23 4860.17 87.30 5184.35 350.00 3.697 65 45.53 4836.92 221.34 4859.83 89.68 5184.12 350.00 3.698 66 45.53 4836.92 220.28 4860.00 88.55 5184.26 350.00 3.698 67 47.63 4836.91 225.55 4859.29 94.36 5183.78 350.00 3.698 68 47.11 4836.91 223.97 4859.40 92.84 5183.91 350.00 3.699 69 46.05 4836.92 225.02 4859.30 92.79 5189.96 356.12 3.700 70 46.58 4836.91 222.39 4859.66 91.04 5184.08 350.00 3.700 71 45.53 4836.92 223.44 4859.49 91.11 5190.11 356.12 3.701 72 45.00 4836.92 219.76 4860.09 87.87 5184.29 350.00 3.701 73 47.11 4836.91 223.44 4859.49 92.28 5183.98 350.00 3.703 74 47.11 4836.91 225.02 4859.30 93.83 5183.78 350.00 3.703 75 45.00 4836.92 226.07 4859.29 92.56 5196.03 362.24 3.703 76 46.05 4836.92 224.49 4859.32 92.35 5190.02 356.12 3.703 77 45.53 4836.92 219.76 4860.09 87.98 5184.33 350.00 3.705 78 45.00 4836.92 222.39 4859.66 89.87 5190.21 356.12 3.705 79 46.05 4836.92 221.34 4859.83 89.80 5184.17 350.00 3.705 80 46.58 4836.91 221.86 4859.74 90.48 5184.15 350.00 3.705 81 46.58 4836.91 226.60 4859.29 94.12 5189.85 356.12 3.706 82 46.58 4836.91 226.07 4859.29 93.72 5189.90 356.12 3.706 83 45.00 4836.92 226.60 4859.29 92.96 5195.98 362.24 3.706 84 47.63 4836.91 226.07 4859.29 94.76 5183.72 350.00 3.706 85 45.00 4836.92 218.71 4860.26 86.73 5184.42 350.00 3.706 86 47.63 4836.91 224.49 4859.32 93.52 5183.89 350.00 3.706 87 45.00 4836.92 225.55 4859.29 92.15 5196.08 362.24 3.706 88 45.53 4836.92 222.92 4859.57 90.55 5190.18 356.12 3.707 89 47.11 4836.91 226.60 4859.29 95.03 5183.61 350.00 3.707 90 47.11 4836.91 222.92 4859.57 91.72 5184.06 350.00 3.708 91 46.05 4836.92 223.97 4859.40 91.79 5190.09 356.12 3.709 92 46.58 4836.91 225.55 4859.29 93.32 5189.96 356.12 3.709 93 45.00 4836.92 221.34 4859.83 88.74 5190.35 356.12 3.709 94 45.00 4836.92 225.02 4859.30 91.75 5196.14 362.24 3.710 95 45.53 4836.92 219.23 4860.17 87.42 5184.40 350.00 3.711 96 47.63 4836.91 223.97 4859.40 92.97 5183.96 350.00 3.711 97 48.16 4836.91 225.02 4859.30 94.08 5183.88 350.00 3.712 98 47.11 4836.91 222.39 4859.66 91.16 5184.13 350.00 3.712 99 45.53 4836.92 222.39 4859.66 89.99 5190.25 356.12 3.712 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4836.92 XR: 225.02 YR: 4859.30 Centre: XC: 93.31 YC: 5183.57 Radius: R: 350.00 Generated failure surface: (20 points) 45.00 4836.92 54.58 4835.72 64.19 4834.78 73.83 4834.11 83.48 4833.71 93.14 4833.57 102.79 4833.70 112.44 4834.09 122.08 4834.75 131.69 4835.68 141.27 4836.87 150.82 4838.33 160.32 4840.04 169.78 4842.02 179.17 4844.26 188.50 4846.76 197.76 4849.52 206.93 4852.53 216.02 4855.79 225.02 4859.30 Slice Geometry and Properties - Critical Failure Surface (circle 1, 42 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.52 -7.1 5.00 5.04 1 50.00 25.0 174.63 95.50 36.93 1.02 2 50.00 7.59 -7.1 4.58 4.62 1 50.00 25.0 875.01 264.98 194.86 1.02 3 54.58 17.98 -5.6 4.81 4.83 1 50.00 25.0 2073.38 449.77 437.02 1.02 4 59.39 27.91 -5.6 4.81 4.83 1 50.00 25.0 3220.48 606.90 678.31 1.02 5 64.19 37.63 -4.0 4.82 4.83 1 50.00 25.0 4341.71 743.88 908.98 1.01 6 69.01 46.97 -4.0 4.82 4.83 1 50.00 25.0 5420.12 861.14 1134.64 1.01 7 73.83 56.08 -2.4 4.82 4.83 1 50.00 25.0 6472.29 958.26 1348.24 1.01 8 78.65 64.80 -2.4 4.82 4.83 1 50.00 25.0 7479.51 1035.21 1558.04 1.01 9 83.48 73.26 -0.8 4.83 4.83 1 50.00 25.0 8456.83 1092.28 1754.51 1.00 10 88.31 81.35 -0.8 4.83 4.83 1 50.00 25.0 9391.55 1129.21 1948.42 1.00 11 93.14 89.13 0.8 4.83 4.83 1 50.00 25.0 10289.86 1145.98 2127.71 1.00 12 97.96 96.58 0.8 4.83 4.83 1 50.00 25.0 11150.86 1142.89 2305.75 1.00 13 102.79 81.03 2.3 3.80 3.80 1 50.00 25.0 9356.13 885.23 2450.48 1.00 14 106.59 85.24 2.3 3.80 3.80 1 50.00 25.0 9843.28 858.24 2578.04 1.00 15 110.39 47.77 2.3 2.05 2.05 1 50.00 25.0 5506.53 452.18 2671.12 1.00 16 112.44 102.85 3.9 4.26 4.27 1 50.00 25.0 11789.68 899.46 2745.35 0.99 17 116.70 131.83 3.9 5.38 5.39 1 50.00 25.0 15060.42 1042.51 2777.55 0.99 18 122.08 115.75 5.5 4.81 4.83 1 50.00 25.0 13227.82 825.82 2719.34 0.99 19 126.88 113.43 5.5 4.81 4.83 1 50.00 25.0 12966.11 702.24 2665.20 0.99 20 131.69 98.22 7.1 4.26 4.29 1 50.00 25.0 11231.46 504.30 2598.33 0.99 21 135.94 95.90 7.1 4.26 4.29 1 50.00 25.0 10968.37 375.49 2536.96 0.99 22 140.20 23.83 7.1 1.07 1.08 3 0.00 45.0 2431.07 302.27 2198.99 0.97 23 141.27 42.35 8.7 1.93 1.95 3 0.00 45.0 4498.73 1667.51 2275.99 0.97 24 143.20 82.08 8.7 3.81 3.85 2 10.00 35.0 10430.81 4652.85 2693.45 0.98 25 147.01 79.83 8.7 3.81 3.85 2 10.00 35.0 10139.69 4513.12 2618.23 0.98 26 150.82 96.08 10.3 4.75 4.83 2 10.00 35.0 12194.94 5437.03 2517.56 0.98 27 155.57 91.95 10.2 4.75 4.83 2 10.00 35.0 11659.04 5178.13 2406.80 0.98 28 160.32 87.03 11.8 4.73 4.83 2 10.00 35.0 11022.92 4899.49 2280.77 0.98 29 165.05 82.30 11.8 4.73 4.83 2 10.00 35.0 10409.50 4601.35 2153.59 0.98 30 169.78 76.79 13.4 4.70 4.83 2 10.00 35.0 9696.01 4283.28 2012.07 0.98 31 174.47 71.48 13.4 4.70 4.83 2 10.00 35.0 9007.35 3946.07 1868.82 0.98 32 179.17 47.08 15.0 3.31 3.43 2 10.00 35.0 5919.94 2588.98 1735.01 0.98 33 182.49 44.11 15.0 3.31 3.43 2 10.00 35.0 5535.09 2398.94 1621.89 0.98 34 185.80 33.99 15.0 2.70 2.80 2 10.00 35.0 4249.61 1814.07 1527.79 0.98 35 188.50 54.50 16.6 4.63 4.83 2 10.00 35.0 6762.22 2817.23 1412.85 0.99 36 193.13 49.52 16.6 4.63 4.83 2 10.00 35.0 6072.59 2402.03 1267.26 0.99 37 197.76 44.95 18.2 4.57 4.81 2 10.00 35.0 5404.37 1961.49 1135.44 0.99 38 202.33 42.37 18.1 4.57 4.81 2 10.00 35.0 4941.27 1511.57 1034.61 0.99 39 206.90 46.78 19.7 5.90 6.27 2 10.00 35.0 5267.11 1262.69 847.28 0.99 40 212.80 19.06 19.7 3.22 3.43 2 10.00 35.0 2069.32 340.26 605.89 0.99 41 216.02 10.88 21.3 2.60 2.79 2 10.00 35.0 1135.57 88.19 407.89 1.00 42 218.62 10.90 21.3 6.40 6.87 1 50.00 25.0 1089.83 0.00 157.12 1.02 X-S Area: 2610.67 Path Length: 183.50 X-S Weight: 309233.06 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S4-Mining-EQ.gmf Processed: 22 Jan 2026 09:28:55 DATA: Analysis 1 - Slope Stability - Case S-4 - Mining Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4862.00 266.60 4862.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 140.20 4859.00 143.20 4859.00 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4857.00 140.20 4857.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 143.20 4857.00 266.60 4857.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4837.10 50.00 4836.90 140.20 4836.80 Profile: 6 (2 points) Material beneath: 1 - Clay 143.20 4836.80 266.60 4836.60 Profile: 7 (2 points) Material beneath: 1 - Clay 140.20 4833.80 143.20 4833.80 Slope Surface (12 points) 0.00 4837.10 50.00 4836.90 116.70 4859.10 140.20 4859.00 143.20 4859.00 185.80 4858.90 198.10 4859.70 206.90 4861.50 212.80 4861.50 216.60 4860.60 224.60 4859.30 266.60 4859.00 Phreatic Surface (5 points) 0.00 4837.10 50.00 4836.90 140.20 4837.90 143.20 4856.80 266.60 4856.80 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4836.90 XR: 221.60 YR: 4859.79 Centre: XC: 70.69 YC: 5336.47 Radius: R: 500.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 300.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-4 - Mining Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.884 Analysis Summary There were: 18883 successful analyses from a total of 20001 trial failure surfaces 1118 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.29 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4836.92 225.02 4859.30 93.31 5183.57 350.00 2.293 <-- Critical Surface 2 45.00 4836.92 225.55 4859.29 93.71 5183.51 350.00 2.295 3 45.53 4836.92 225.02 4859.30 93.44 5183.62 350.00 2.297 4 45.00 4836.92 226.07 4859.29 94.11 5183.46 350.00 2.297 5 45.00 4836.92 224.49 4859.32 92.88 5183.63 350.00 2.298 6 45.53 4836.92 225.55 4859.29 93.84 5183.57 350.00 2.299 7 45.00 4836.92 226.60 4859.29 94.50 5183.40 350.00 2.300 8 45.53 4836.92 226.07 4859.29 94.24 5183.51 350.00 2.302 9 45.00 4836.92 223.97 4859.40 92.33 5183.70 350.00 2.302 10 46.05 4836.92 225.02 4859.30 93.57 5183.67 350.00 2.303 11 46.05 4836.92 225.55 4859.29 93.97 5183.62 350.00 2.304 12 45.53 4836.92 226.60 4859.29 94.64 5183.46 350.00 2.304 13 45.00 4836.92 226.07 4859.29 93.33 5189.75 356.12 2.304 14 46.05 4836.92 226.60 4859.29 94.77 5183.51 350.00 2.305 15 46.05 4836.92 226.07 4859.29 94.37 5183.56 350.00 2.306 16 46.58 4836.91 226.07 4859.29 94.50 5183.62 350.00 2.307 17 45.00 4836.92 226.60 4859.29 93.73 5189.69 356.12 2.307 18 46.05 4836.92 224.49 4859.32 93.14 5183.73 350.00 2.308 19 46.58 4836.91 225.55 4859.29 94.10 5183.67 350.00 2.308 20 47.11 4836.91 225.55 4859.29 94.23 5183.72 350.00 2.308 21 45.53 4836.92 226.07 4859.29 93.46 5189.80 356.12 2.309 22 45.53 4836.92 223.97 4859.40 92.46 5183.76 350.00 2.309 23 45.00 4836.92 225.55 4859.29 92.93 5189.80 356.12 2.309 24 45.53 4836.92 224.49 4859.32 93.01 5183.68 350.00 2.309 25 45.00 4836.92 223.44 4859.49 91.78 5183.78 350.00 2.309 26 45.00 4836.92 225.02 4859.30 92.53 5189.86 356.12 2.311 27 45.53 4836.92 226.60 4859.29 93.86 5189.75 356.12 2.311 28 46.58 4836.91 226.60 4859.29 94.90 5183.56 350.00 2.311 29 46.05 4836.92 226.60 4859.29 93.99 5189.80 356.12 2.311 30 47.11 4836.91 226.07 4859.29 94.63 5183.67 350.00 2.313 31 46.58 4836.91 225.02 4859.30 93.70 5183.73 350.00 2.313 32 46.58 4836.91 224.49 4859.32 93.27 5183.79 350.00 2.315 33 46.05 4836.92 226.07 4859.29 93.59 5189.85 356.12 2.315 34 46.05 4836.92 223.97 4859.40 92.59 5183.81 350.00 2.316 35 45.53 4836.92 223.44 4859.49 91.91 5183.83 350.00 2.316 36 45.00 4836.92 224.49 4859.32 92.10 5189.91 356.12 2.316 37 47.63 4836.91 225.55 4859.29 94.36 5183.78 350.00 2.317 38 47.11 4836.91 226.60 4859.29 95.03 5183.61 350.00 2.317 39 46.58 4836.91 226.60 4859.29 94.12 5189.85 356.12 2.317 40 45.53 4836.92 225.02 4859.30 92.66 5189.91 356.12 2.317 41 45.00 4836.92 222.92 4859.57 91.23 5183.85 350.00 2.318 42 47.63 4836.91 225.02 4859.30 93.96 5183.83 350.00 2.318 43 47.63 4836.91 226.07 4859.29 94.76 5183.72 350.00 2.318 44 46.05 4836.92 225.55 4859.29 93.19 5189.90 356.12 2.319 45 45.53 4836.92 225.55 4859.29 93.06 5189.85 356.12 2.320 46 45.00 4836.92 226.60 4859.29 92.96 5195.98 362.24 2.321 47 46.58 4836.91 226.07 4859.29 93.72 5189.90 356.12 2.321 48 47.11 4836.91 224.49 4859.32 93.40 5183.84 350.00 2.322 49 47.63 4836.91 226.60 4859.29 95.16 5183.67 350.00 2.322 50 45.00 4836.92 226.07 4859.29 92.56 5196.03 362.24 2.322 51 46.58 4836.91 223.97 4859.40 92.71 5183.86 350.00 2.322 52 46.05 4836.92 223.44 4859.49 92.03 5183.88 350.00 2.323 53 45.53 4836.92 224.49 4859.32 92.23 5189.97 356.12 2.323 54 47.11 4836.91 226.60 4859.29 94.25 5189.90 356.12 2.323 55 48.16 4836.91 226.07 4859.29 94.89 5183.77 350.00 2.323 56 47.11 4836.91 225.02 4859.30 93.83 5183.78 350.00 2.324 57 45.53 4836.92 222.92 4859.57 91.35 5183.91 350.00 2.324 58 45.00 4836.92 223.97 4859.40 91.54 5189.99 356.12 2.324 59 46.05 4836.92 225.02 4859.30 92.79 5189.96 356.12 2.324 60 46.58 4836.91 225.55 4859.29 93.32 5189.96 356.12 2.326 61 46.05 4836.92 226.60 4859.29 93.21 5196.08 362.24 2.326 62 48.16 4836.91 226.60 4859.29 95.29 5183.72 350.00 2.326 63 45.00 4836.92 225.55 4859.29 92.15 5196.08 362.24 2.327 64 48.16 4836.91 225.02 4859.30 94.08 5183.88 350.00 2.327 65 45.00 4836.92 222.39 4859.66 90.67 5183.93 350.00 2.328 66 48.68 4836.91 226.07 4859.29 95.02 5183.83 350.00 2.328 67 47.11 4836.91 225.55 4859.29 93.44 5190.01 356.12 2.328 68 48.16 4836.91 225.55 4859.29 94.49 5183.83 350.00 2.328 69 47.63 4836.91 224.49 4859.32 93.52 5183.89 350.00 2.328 70 45.53 4836.92 226.07 4859.29 92.68 5196.08 362.24 2.328 71 47.11 4836.91 223.97 4859.40 92.84 5183.91 350.00 2.329 72 46.58 4836.91 223.44 4859.49 92.16 5183.93 350.00 2.329 73 46.05 4836.92 224.49 4859.32 92.35 5190.02 356.12 2.330 74 47.63 4836.91 226.60 4859.29 94.37 5189.95 356.12 2.331 75 48.68 4836.91 226.60 4859.29 95.42 5183.77 350.00 2.331 76 46.05 4836.92 222.92 4859.57 91.48 5183.96 350.00 2.331 77 45.53 4836.92 226.60 4859.29 93.08 5196.03 362.24 2.331 78 45.53 4836.92 223.97 4859.40 91.67 5190.04 356.12 2.331 79 46.58 4836.91 225.02 4859.30 92.91 5190.01 356.12 2.331 80 45.00 4836.92 223.44 4859.49 90.99 5190.06 356.12 2.331 81 45.53 4836.92 222.39 4859.66 90.79 5183.98 350.00 2.332 82 45.00 4836.92 225.02 4859.30 91.75 5196.14 362.24 2.332 83 47.11 4836.91 226.07 4859.29 93.85 5189.95 356.12 2.333 84 47.63 4836.91 226.07 4859.29 93.97 5190.00 356.12 2.333 85 45.53 4836.92 225.55 4859.29 92.28 5196.13 362.24 2.334 86 46.58 4836.91 226.60 4859.29 93.34 5196.13 362.24 2.335 87 49.21 4836.90 226.60 4859.29 95.54 5183.82 350.00 2.335 88 49.21 4836.90 226.07 4859.29 95.14 5183.88 350.00 2.335 89 48.16 4836.91 224.49 4859.32 93.65 5183.94 350.00 2.335 90 46.05 4836.92 226.07 4859.29 92.81 5196.13 362.24 2.335 91 48.68 4836.91 225.02 4859.30 94.21 5183.93 350.00 2.335 92 47.63 4836.91 223.97 4859.40 92.97 5183.96 350.00 2.336 93 47.11 4836.91 223.44 4859.49 92.28 5183.98 350.00 2.336 94 46.58 4836.91 224.49 4859.32 92.48 5190.07 356.12 2.336 95 47.63 4836.91 225.55 4859.29 93.57 5190.06 356.12 2.337 96 46.58 4836.91 222.92 4859.57 91.60 5184.01 350.00 2.337 97 46.05 4836.92 223.97 4859.40 91.79 5190.09 356.12 2.337 98 46.58 4836.91 226.07 4859.29 92.94 5196.18 362.24 2.337 99 47.11 4836.91 225.02 4859.30 93.04 5190.06 356.12 2.338 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4836.92 XR: 225.02 YR: 4859.30 Centre: XC: 93.31 YC: 5183.57 Radius: R: 350.00 Generated failure surface: (20 points) 45.00 4836.92 54.58 4835.72 64.19 4834.78 73.83 4834.11 83.48 4833.71 93.14 4833.57 102.79 4833.70 112.44 4834.09 122.08 4834.75 131.69 4835.68 141.27 4836.87 150.82 4838.33 160.32 4840.04 169.78 4842.02 179.17 4844.26 188.50 4846.76 197.76 4849.52 206.93 4852.53 216.02 4855.79 225.02 4859.30 Slice Geometry and Properties - Critical Failure Surface (circle 1, 42 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.52 -7.1 5.00 5.04 1 50.00 25.0 174.63 95.50 38.15 1.03 2 50.00 7.59 -7.1 4.58 4.62 1 50.00 25.0 875.01 264.98 197.23 1.03 3 54.58 17.98 -5.6 4.81 4.83 1 50.00 25.0 2073.38 449.77 440.40 1.03 4 59.39 27.91 -5.6 4.81 4.83 1 50.00 25.0 3220.48 606.90 683.26 1.03 5 64.19 37.63 -4.0 4.82 4.83 1 50.00 25.0 4341.71 743.88 913.58 1.02 6 69.01 46.97 -4.0 4.82 4.83 1 50.00 25.0 5420.12 861.14 1140.31 1.02 7 73.83 56.08 -2.4 4.82 4.83 1 50.00 25.0 6472.29 958.26 1352.25 1.01 8 78.65 64.80 -2.4 4.82 4.83 1 50.00 25.0 7479.51 1035.21 1562.67 1.01 9 83.48 73.26 -0.8 4.83 4.83 1 50.00 25.0 8456.83 1092.28 1756.29 1.00 10 88.31 81.35 -0.8 4.83 4.83 1 50.00 25.0 9391.55 1129.21 1950.39 1.00 11 93.14 89.13 0.8 4.83 4.83 1 50.00 25.0 10289.86 1145.98 2125.70 1.00 12 97.96 96.58 0.8 4.83 4.83 1 50.00 25.0 11150.86 1142.89 2303.58 1.00 13 102.79 81.03 2.3 3.80 3.80 1 50.00 25.0 9356.13 885.23 2443.35 0.99 14 106.59 85.24 2.3 3.80 3.80 1 50.00 25.0 9843.28 858.24 2570.52 0.99 15 110.39 47.77 2.3 2.05 2.05 1 50.00 25.0 5506.53 452.18 2663.28 0.99 16 112.44 102.85 3.9 4.26 4.27 1 50.00 25.0 11789.68 899.46 2731.86 0.99 17 116.70 131.83 3.9 5.38 5.39 1 50.00 25.0 15060.42 1042.51 2763.82 0.99 18 122.08 115.75 5.5 4.81 4.83 1 50.00 25.0 13227.82 825.82 2700.41 0.99 19 126.88 113.43 5.5 4.81 4.83 1 50.00 25.0 12966.11 702.24 2646.45 0.99 20 131.69 98.22 7.1 4.26 4.29 1 50.00 25.0 11231.46 504.30 2574.66 0.98 21 135.94 95.90 7.1 4.26 4.29 1 50.00 25.0 10968.37 375.49 2513.55 0.98 22 140.20 23.83 7.1 1.07 1.08 3 0.00 45.0 2431.07 302.27 2162.39 0.96 23 141.27 42.35 8.7 1.93 1.95 3 0.00 45.0 4498.73 1667.51 2243.15 0.95 24 143.20 82.08 8.7 3.81 3.85 2 10.00 35.0 10430.81 4652.85 2668.67 0.97 25 147.01 79.83 8.7 3.81 3.85 2 10.00 35.0 10139.69 4513.12 2594.11 0.97 26 150.82 96.08 10.3 4.75 4.83 2 10.00 35.0 12194.94 5437.03 2490.25 0.96 27 155.57 91.95 10.2 4.75 4.83 2 10.00 35.0 11659.04 5178.13 2380.61 0.96 28 160.32 87.03 11.8 4.73 4.83 2 10.00 35.0 11022.92 4899.49 2252.21 0.96 29 165.05 82.30 11.8 4.73 4.83 2 10.00 35.0 10409.50 4601.35 2126.47 0.96 30 169.78 76.79 13.4 4.70 4.83 2 10.00 35.0 9696.01 4283.28 1983.38 0.96 31 174.47 71.48 13.4 4.70 4.83 2 10.00 35.0 9007.35 3946.07 1841.98 0.96 32 179.17 47.08 15.0 3.31 3.43 2 10.00 35.0 5919.94 2588.98 1707.10 0.96 33 182.49 44.11 15.0 3.31 3.43 2 10.00 35.0 5535.09 2398.94 1595.62 0.96 34 185.80 33.99 15.0 2.70 2.80 2 10.00 35.0 4249.61 1814.07 1502.73 0.96 35 188.50 54.50 16.6 4.63 4.83 2 10.00 35.0 6762.22 2817.23 1386.77 0.96 36 193.13 49.52 16.6 4.63 4.83 2 10.00 35.0 6072.59 2402.03 1243.01 0.96 37 197.76 44.95 18.2 4.57 4.81 2 10.00 35.0 5404.37 1961.49 1110.38 0.96 38 202.33 42.37 18.1 4.57 4.81 2 10.00 35.0 4941.27 1511.57 1009.80 0.96 39 206.90 46.78 19.7 5.90 6.27 2 10.00 35.0 5267.11 1262.69 823.11 0.96 40 212.80 19.06 19.7 3.22 3.43 2 10.00 35.0 2069.32 340.26 586.80 0.96 41 216.02 10.88 21.3 2.60 2.79 2 10.00 35.0 1135.57 88.19 392.45 0.96 42 218.62 10.90 21.3 6.40 6.87 1 50.00 25.0 1089.83 0.00 149.91 0.99 X-S Area: 2610.67 Path Length: 183.50 X-S Weight: 309233.06 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S5-Mining.gmf Processed: 22 Jan 2026 09:29:38 DATA: Analysis 1 - Slope Stability - Case S-5 - Mining Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (11 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4865.00 216.90 4865.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 140.40 4861.30 143.40 4861.30 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4859.00 140.40 4859.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 143.40 4859.00 216.90 4859.00 Profile: 5 (2 points) Material beneath: 1 - Clay 0.00 4851.00 140.40 4851.00 Profile: 6 (2 points) Material beneath: 1 - Clay 143.40 4851.00 216.90 4851.00 Profile: 7 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4843.00 140.40 4843.00 Profile: 8 (2 points) Material beneath: 2 - Sand and Gravel 143.40 4843.00 216.90 4843.00 Profile: 9 (3 points) Material beneath: 1 - Clay 0.00 4838.60 50.00 4838.80 140.40 4838.90 Profile: 10 (2 points) Material beneath: 1 - Clay 143.40 4838.90 216.90 4838.90 Profile: 11 (2 points) Material beneath: 1 - Clay 140.40 4835.90 143.40 4835.90 Slope Surface (9 points) 0.00 4838.60 50.00 4838.80 116.90 4861.10 140.40 4861.30 143.40 4861.30 166.90 4862.00 176.40 4862.60 180.30 4861.90 216.90 4863.00 Phreatic Surface (5 points) 0.00 4838.60 50.00 4838.80 140.40 4839.90 143.40 4857.30 216.90 4857.30 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4838.80 XR: 171.90 YR: 4862.32 Centre: XC: 55.35 YC: 5138.75 Radius: R: 300.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-5 - Mining Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 3.180 Analysis Summary There were: 16551 successful analyses from a total of 20001 trial failure surfaces 3450 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.75 Negative normal stresses exist on the base of one or more slices; examine slice data and consult the GALENA Help utility Test Factor is less than 0.2 lower limit for one or more slices; examine slice data and consult the GALENA Help utility Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4838.78 176.37 4862.60 81.83 5009.86 175.00 2.749 <-- Critical Surface 2 45.53 4838.78 176.37 4862.60 81.96 5009.95 175.00 2.760 3 46.05 4838.78 176.37 4862.60 82.10 5010.03 175.00 2.770 4 45.00 4838.78 174.79 4862.50 80.76 5010.09 175.00 2.772 5 45.00 4838.78 176.90 4862.51 82.32 5009.75 175.00 2.773 6 45.00 4838.78 175.85 4862.57 81.47 5009.94 175.00 2.776 7 45.00 4838.78 166.90 4862.00 75.33 5011.13 175.00 2.776 8 45.00 4838.78 175.32 4862.53 81.12 5010.01 175.00 2.777 9 45.00 4838.78 176.37 4862.60 80.85 5015.28 180.10 2.778 10 45.00 4838.78 174.27 4862.47 80.40 5010.16 175.00 2.779 11 45.00 4838.78 173.22 4862.40 79.69 5010.31 175.00 2.780 12 46.58 4838.79 176.37 4862.60 82.23 5010.12 175.00 2.780 13 45.00 4838.78 168.48 4862.10 76.43 5010.93 175.00 2.781 14 45.00 4838.78 172.69 4862.37 79.33 5010.38 175.00 2.782 15 45.00 4838.78 167.43 4862.03 75.70 5011.07 175.00 2.782 16 45.00 4838.78 167.95 4862.07 76.06 5011.00 175.00 2.783 17 45.00 4838.78 172.16 4862.33 78.97 5010.45 175.00 2.783 18 45.53 4838.78 176.90 4862.51 82.46 5009.84 175.00 2.784 19 45.53 4838.78 174.79 4862.50 80.89 5010.17 175.00 2.784 20 45.00 4838.78 171.64 4862.30 78.61 5010.52 175.00 2.784 21 45.00 4838.78 173.74 4862.43 80.04 5010.23 175.00 2.785 22 45.00 4838.78 169.01 4862.13 76.79 5010.87 175.00 2.785 23 45.00 4838.78 169.53 4862.17 77.16 5010.80 175.00 2.786 24 45.00 4838.78 170.06 4862.20 77.52 5010.73 175.00 2.786 25 45.53 4838.78 175.85 4862.57 81.61 5010.02 175.00 2.786 26 45.53 4838.78 166.90 4862.00 75.45 5011.20 175.00 2.787 27 45.53 4838.78 173.74 4862.43 80.17 5010.32 175.00 2.789 28 45.00 4838.78 171.11 4862.27 78.24 5010.59 175.00 2.789 29 45.53 4838.78 176.37 4862.60 80.98 5015.36 180.10 2.790 30 45.53 4838.78 169.53 4862.17 77.28 5010.88 175.00 2.790 31 45.53 4838.78 167.43 4862.03 75.82 5011.14 175.00 2.791 32 45.53 4838.78 173.22 4862.40 79.81 5010.39 175.00 2.791 33 45.00 4838.78 170.58 4862.23 77.88 5010.66 175.00 2.792 34 45.53 4838.78 169.01 4862.13 76.92 5010.94 175.00 2.792 35 45.53 4838.78 172.69 4862.37 79.45 5010.46 175.00 2.793 36 45.53 4838.78 167.95 4862.07 76.18 5011.08 175.00 2.793 37 45.53 4838.78 174.27 4862.47 80.53 5010.24 175.00 2.793 38 45.53 4838.78 175.32 4862.53 81.25 5010.10 175.00 2.793 39 46.05 4838.78 176.90 4862.51 82.59 5009.93 175.00 2.794 40 45.53 4838.78 172.16 4862.33 79.09 5010.53 175.00 2.794 41 45.53 4838.78 168.48 4862.10 76.55 5011.01 175.00 2.794 42 45.53 4838.78 171.64 4862.30 78.73 5010.60 175.00 2.795 43 45.53 4838.78 170.06 4862.20 77.64 5010.81 175.00 2.796 44 46.05 4838.78 175.85 4862.57 81.74 5010.11 175.00 2.797 45 45.53 4838.78 171.11 4862.27 78.37 5010.67 175.00 2.797 46 46.05 4838.78 175.32 4862.53 81.38 5010.18 175.00 2.797 47 47.11 4838.79 176.37 4862.60 82.36 5010.20 175.00 2.797 48 46.05 4838.78 176.37 4862.60 81.11 5015.44 180.10 2.799 49 46.05 4838.78 166.90 4862.00 75.57 5011.28 175.00 2.799 50 46.05 4838.78 174.27 4862.47 80.66 5010.33 175.00 2.799 51 46.05 4838.78 167.43 4862.03 75.94 5011.21 175.00 2.799 52 46.05 4838.78 174.79 4862.50 81.02 5010.25 175.00 2.799 53 45.00 4838.78 166.90 4862.00 74.31 5016.48 180.10 2.800 54 45.00 4838.78 174.79 4862.50 79.77 5015.49 180.10 2.801 55 46.05 4838.78 173.74 4862.43 80.30 5010.40 175.00 2.801 56 46.05 4838.78 170.06 4862.20 77.77 5010.89 175.00 2.801 57 47.63 4838.79 176.37 4862.60 82.49 5010.28 175.00 2.801 58 46.05 4838.78 167.95 4862.07 76.31 5011.15 175.00 2.802 59 46.05 4838.78 173.22 4862.40 79.94 5010.47 175.00 2.803 60 46.05 4838.78 168.48 4862.10 76.67 5011.08 175.00 2.803 61 45.00 4838.78 176.90 4862.51 81.35 5015.18 180.10 2.803 62 46.05 4838.78 169.53 4862.17 77.40 5010.95 175.00 2.804 63 46.05 4838.78 172.69 4862.37 79.58 5010.54 175.00 2.804 64 46.58 4838.79 174.27 4862.47 80.79 5010.41 175.00 2.804 65 46.05 4838.78 169.01 4862.13 77.04 5011.02 175.00 2.805 66 46.58 4838.79 176.90 4862.51 82.73 5010.01 175.00 2.805 67 46.05 4838.78 171.64 4862.30 78.86 5010.68 175.00 2.805 68 45.00 4838.78 175.32 4862.53 80.13 5015.42 180.10 2.806 69 46.05 4838.78 172.16 4862.33 79.22 5010.61 175.00 2.806 70 46.05 4838.78 171.11 4862.27 78.50 5010.75 175.00 2.806 71 45.00 4838.78 167.43 4862.03 74.68 5016.42 180.10 2.806 72 46.58 4838.79 166.90 4862.00 75.69 5011.35 175.00 2.806 73 46.58 4838.79 175.85 4862.57 81.87 5010.19 175.00 2.807 74 45.00 4838.78 175.85 4862.57 80.49 5015.35 180.10 2.808 75 45.00 4838.78 176.37 4862.60 79.87 5020.67 185.20 2.809 76 46.58 4838.79 174.79 4862.50 81.15 5010.34 175.00 2.809 77 45.53 4838.78 170.58 4862.23 78.01 5010.74 175.00 2.809 78 46.58 4838.79 167.43 4862.03 76.06 5011.29 175.00 2.809 79 46.58 4838.79 175.32 4862.53 81.51 5010.26 175.00 2.810 80 45.00 4838.78 168.48 4862.10 75.42 5016.29 180.10 2.810 81 46.58 4838.79 167.95 4862.07 76.42 5011.22 175.00 2.810 82 45.00 4838.78 174.27 4862.47 79.41 5015.56 180.10 2.810 83 46.58 4838.79 176.37 4862.60 81.24 5015.52 180.10 2.810 84 45.53 4838.78 166.90 4862.00 74.43 5016.55 180.10 2.812 85 45.00 4838.78 169.01 4862.13 75.78 5016.23 180.10 2.812 86 45.00 4838.78 173.74 4862.43 79.05 5015.63 180.10 2.812 87 46.58 4838.79 173.74 4862.43 80.43 5010.48 175.00 2.812 88 46.58 4838.79 168.48 4862.10 76.79 5011.16 175.00 2.812 89 45.00 4838.78 167.95 4862.07 75.05 5016.36 180.10 2.812 90 48.16 4838.79 176.37 4862.60 82.62 5010.37 175.00 2.813 91 45.00 4838.78 169.53 4862.17 76.15 5016.17 180.10 2.813 92 45.00 4838.78 170.58 4862.23 76.88 5016.04 180.10 2.813 93 45.00 4838.78 173.22 4862.40 78.69 5015.70 180.10 2.813 94 45.53 4838.78 176.90 4862.51 81.48 5015.26 180.10 2.813 95 46.58 4838.79 169.01 4862.13 77.16 5011.09 175.00 2.814 96 46.58 4838.79 173.22 4862.40 80.07 5010.55 175.00 2.814 97 45.53 4838.78 174.79 4862.50 79.90 5015.57 180.10 2.814 98 46.05 4838.78 170.58 4862.23 78.13 5010.82 175.00 2.814 99 45.00 4838.78 170.06 4862.20 76.51 5016.10 180.10 2.815 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4838.78 XR: 176.37 YR: 4862.60 Centre: XC: 81.83 YC: 5009.86 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4838.78 52.08 4837.41 59.21 4836.33 66.37 4835.54 73.56 4835.06 80.77 4834.86 87.98 4834.97 95.18 4835.37 102.35 4836.07 109.49 4837.06 116.59 4838.35 123.62 4839.92 130.59 4841.79 137.47 4843.94 144.25 4846.37 150.93 4849.08 157.50 4852.07 163.93 4855.32 170.23 4858.83 176.37 4862.60 Slice Geometry and Properties - Critical Failure Surface (circle 1, 45 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.62 -11.0 2.50 2.55 1 50.00 25.0 71.03 39.26 32.50 1.05 2 47.50 1.85 -11.0 2.50 2.55 1 50.00 25.0 213.24 117.86 90.26 1.05 3 50.00 3.19 -11.0 2.08 2.12 1 50.00 25.0 367.51 158.88 184.00 1.05 4 52.08 10.51 -8.6 3.56 3.60 1 50.00 25.0 1210.46 384.19 348.60 1.04 5 55.64 16.66 -8.6 3.56 3.60 1 50.00 25.0 1920.84 515.43 552.21 1.04 6 59.21 21.35 -6.2 3.39 3.41 1 50.00 25.0 2461.86 594.32 737.67 1.03 7 62.60 29.71 -6.2 3.77 3.79 1 50.00 25.0 3390.21 763.48 914.04 1.02 8 66.37 33.93 -3.9 3.60 3.60 1 50.00 25.0 3812.25 809.33 1071.04 1.01 9 69.97 39.12 -3.9 3.60 3.60 1 50.00 25.0 4346.80 874.12 1221.18 1.01 10 73.56 44.13 -1.5 3.60 3.60 1 50.00 25.0 4860.16 922.23 1354.25 1.00 11 77.17 48.81 -1.5 3.60 3.60 1 50.00 25.0 5335.01 953.75 1486.55 1.00 12 80.77 42.72 0.8 2.91 2.91 1 50.00 25.0 4641.89 783.24 1589.30 1.00 13 83.69 45.42 0.8 2.91 2.91 1 50.00 25.0 4912.11 782.00 1681.80 1.00 14 86.60 22.46 0.8 1.38 1.38 1 50.00 25.0 2425.32 369.87 1753.42 1.00 15 87.98 61.15 3.2 3.60 3.60 1 50.00 25.0 6623.92 947.82 1824.68 0.99 16 91.58 64.74 3.2 3.60 3.60 1 50.00 25.0 7039.55 912.56 1939.00 0.99 17 95.18 67.85 5.6 3.59 3.60 1 50.00 25.0 7400.31 860.62 2031.33 0.99 18 98.77 70.89 5.6 3.59 3.60 1 50.00 25.0 7751.75 791.87 2127.39 0.99 19 102.35 73.30 7.9 3.57 3.60 1 50.00 25.0 8032.61 706.64 2200.04 0.99 20 105.92 75.77 7.9 3.57 3.60 1 50.00 25.0 8319.59 604.71 2277.98 0.99 21 109.49 23.94 10.3 1.11 1.12 1 50.00 25.0 2631.40 166.09 2310.50 0.99 22 110.60 65.77 10.3 2.99 3.04 1 50.00 25.0 7212.40 384.02 2337.57 0.99 23 113.59 67.13 10.3 2.99 3.04 1 50.00 25.0 7325.76 287.78 2373.35 0.99 24 116.59 53.03 12.6 2.36 2.42 1 50.00 25.0 5767.30 152.66 2355.41 0.99 25 118.95 78.61 12.6 3.60 3.69 2 10.00 35.0 8513.68 87.72 2239.52 0.97 26 122.54 23.07 12.6 1.08 1.11 2 10.00 35.0 2487.95 0.00 2177.71 0.97 27 123.62 72.36 15.0 3.48 3.60 2 10.00 35.0 7789.63 0.00 2093.43 0.97 28 127.10 69.21 15.0 3.48 3.60 2 10.00 35.0 7426.37 0.00 1995.69 0.97 29 130.59 72.89 17.4 3.87 4.05 2 10.00 35.0 7788.30 0.00 1863.38 0.97 30 134.46 53.58 17.4 3.01 3.16 1 50.00 25.0 5719.65 0.00 1798.13 0.99 31 137.47 49.33 19.7 2.93 3.12 1 50.00 25.0 5284.92 0.00 1692.61 1.00 32 140.40 15.11 19.7 0.94 0.99 3 0.00 45.0 1510.51 0.00 1427.82 0.94 33 141.34 32.20 19.7 2.06 2.19 3 0.00 45.0 3336.24 768.35 1470.33 0.94 34 143.40 12.89 19.7 0.85 0.91 1 50.00 25.0 1532.93 627.07 1725.87 1.00 35 144.25 47.85 22.1 3.34 3.60 1 50.00 25.0 5698.87 2305.09 1630.57 1.01 36 147.59 43.65 22.1 3.34 3.60 1 50.00 25.0 5211.65 2000.43 1488.62 1.01 37 150.93 48.68 24.4 4.22 4.63 1 50.00 25.0 5833.49 2097.77 1309.09 1.02 38 155.15 23.82 24.4 2.35 2.58 2 10.00 35.0 2847.82 927.44 1123.63 0.98 39 157.50 28.60 26.8 3.22 3.60 2 10.00 35.0 3368.68 994.36 957.48 0.99 40 160.72 23.68 26.8 3.22 3.60 2 10.00 35.0 2719.73 628.79 767.20 0.99 41 163.93 17.24 29.2 2.97 3.40 2 10.00 35.0 1902.83 244.96 568.66 1.00 42 166.90 2.86 29.2 0.59 0.67 2 10.00 35.0 304.19 6.85 453.62 1.00 43 167.49 11.13 29.2 2.74 3.14 2 10.00 35.0 1151.37 0.00 365.91 1.00 44 170.23 7.79 31.5 3.07 3.60 1 50.00 25.0 778.98 0.00 219.52 1.06 45 173.30 2.60 -90.0 3.10 4860.41 1 50.00 25.0 259.66 0.00 -107.95 -5.92 X-S Area: 1721.18 Path Length: 4993.78 X-S Weight: 189540.70 GALENA 7.2 Analysis Results Version: 7.2.3.05 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S5-Mining-EQ.gmf Processed: 22 Jan 2026 09:30:08 DATA: Analysis 1 - Slope Stability - Case S-5 - Mining Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (11 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4865.00 216.90 4865.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 140.40 4861.30 143.40 4861.30 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4859.00 140.40 4859.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 143.40 4859.00 216.90 4859.00 Profile: 5 (2 points) Material beneath: 1 - Clay 0.00 4851.00 140.40 4851.00 Profile: 6 (2 points) Material beneath: 1 - Clay 143.40 4851.00 216.90 4851.00 Profile: 7 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4843.00 140.40 4843.00 Profile: 8 (2 points) Material beneath: 2 - Sand and Gravel 143.40 4843.00 216.90 4843.00 Profile: 9 (3 points) Material beneath: 1 - Clay 0.00 4838.60 50.00 4838.80 140.40 4838.90 Profile: 10 (2 points) Material beneath: 1 - Clay 143.40 4838.90 216.90 4838.90 Profile: 11 (2 points) Material beneath: 1 - Clay 140.40 4835.90 143.40 4835.90 Slope Surface (9 points) 0.00 4838.60 50.00 4838.80 116.90 4861.10 140.40 4861.30 143.40 4861.30 166.90 4862.00 176.40 4862.60 180.30 4861.90 216.90 4863.00 Phreatic Surface (5 points) 0.00 4838.60 50.00 4838.80 140.40 4839.90 143.40 4857.30 216.90 4857.30 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4838.80 XR: 171.90 YR: 4862.32 Centre: XC: 55.35 YC: 5138.75 Radius: R: 300.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-5 - Mining Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.299 Analysis Summary There were: 16551 successful analyses from a total of 20001 trial failure surfaces 3450 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.97 Negative normal stresses exist on the base of one or more slices; examine slice data and consult the GALENA Help utility Test Factor is less than 0.2 lower limit for one or more slices; examine slice data and consult the GALENA Help utility Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4838.78 176.37 4862.60 81.83 5009.86 175.00 1.975 <-- Critical Surface 2 45.53 4838.78 176.37 4862.60 81.96 5009.95 175.00 1.982 3 45.00 4838.78 176.90 4862.51 82.32 5009.75 175.00 1.986 4 46.05 4838.78 176.37 4862.60 82.10 5010.03 175.00 1.988 5 45.00 4838.78 175.85 4862.57 81.47 5009.94 175.00 1.993 6 45.53 4838.78 176.90 4862.51 82.46 5009.84 175.00 1.993 7 45.00 4838.78 174.79 4862.50 80.76 5010.09 175.00 1.994 8 45.00 4838.78 176.37 4862.60 80.85 5015.28 180.10 1.995 9 45.00 4838.78 175.32 4862.53 81.12 5010.01 175.00 1.995 10 46.58 4838.79 176.37 4862.60 82.23 5010.12 175.00 1.995 11 45.53 4838.78 175.85 4862.57 81.61 5010.02 175.00 2.000 12 46.05 4838.78 176.90 4862.51 82.59 5009.93 175.00 2.000 13 45.00 4838.78 174.27 4862.47 80.40 5010.16 175.00 2.001 14 45.53 4838.78 174.79 4862.50 80.89 5010.17 175.00 2.002 15 45.53 4838.78 176.37 4862.60 80.98 5015.36 180.10 2.003 16 45.00 4838.78 173.22 4862.40 79.69 5010.31 175.00 2.006 17 46.05 4838.78 175.85 4862.57 81.74 5010.11 175.00 2.007 18 45.53 4838.78 175.32 4862.53 81.25 5010.10 175.00 2.007 19 45.00 4838.78 173.74 4862.43 80.04 5010.23 175.00 2.007 20 46.58 4838.79 176.90 4862.51 82.73 5010.01 175.00 2.007 21 47.11 4838.79 176.37 4862.60 82.36 5010.20 175.00 2.007 22 45.00 4838.78 176.90 4862.51 81.35 5015.18 180.10 2.007 23 45.00 4838.78 172.69 4862.37 79.33 5010.38 175.00 2.009 24 46.05 4838.78 175.32 4862.53 81.38 5010.18 175.00 2.009 25 47.63 4838.79 176.37 4862.60 82.49 5010.28 175.00 2.009 26 46.05 4838.78 176.37 4862.60 81.11 5015.44 180.10 2.009 27 45.53 4838.78 173.74 4862.43 80.17 5010.32 175.00 2.010 28 45.53 4838.78 174.27 4862.47 80.53 5010.24 175.00 2.010 29 45.00 4838.78 172.16 4862.33 78.97 5010.45 175.00 2.012 30 46.05 4838.78 174.79 4862.50 81.02 5010.25 175.00 2.013 31 45.53 4838.78 173.22 4862.40 79.81 5010.39 175.00 2.013 32 46.58 4838.79 175.85 4862.57 81.87 5010.19 175.00 2.014 33 45.53 4838.78 176.90 4862.51 81.48 5015.26 180.10 2.014 34 47.11 4838.79 176.90 4862.51 82.86 5010.10 175.00 2.014 35 46.05 4838.78 174.27 4862.47 80.66 5010.33 175.00 2.014 36 45.00 4838.78 171.64 4862.30 78.61 5010.52 175.00 2.014 37 45.00 4838.78 174.79 4862.50 79.77 5015.49 180.10 2.015 38 45.00 4838.78 175.85 4862.57 80.49 5015.35 180.10 2.016 39 45.53 4838.78 172.69 4862.37 79.45 5010.46 175.00 2.016 40 45.00 4838.78 175.32 4862.53 80.13 5015.42 180.10 2.016 41 46.58 4838.79 176.37 4862.60 81.24 5015.52 180.10 2.017 42 48.16 4838.79 176.37 4862.60 82.62 5010.37 175.00 2.017 43 46.58 4838.79 175.32 4862.53 81.51 5010.26 175.00 2.017 44 46.05 4838.78 173.74 4862.43 80.30 5010.40 175.00 2.018 45 45.00 4838.78 176.37 4862.60 79.87 5020.67 185.20 2.018 46 46.58 4838.79 174.27 4862.47 80.79 5010.41 175.00 2.018 47 46.58 4838.79 174.79 4862.50 81.15 5010.34 175.00 2.019 48 45.53 4838.78 172.16 4862.33 79.09 5010.53 175.00 2.019 49 45.00 4838.78 171.11 4862.27 78.24 5010.59 175.00 2.020 50 46.05 4838.78 176.90 4862.51 81.61 5015.34 180.10 2.021 51 46.05 4838.78 173.22 4862.40 79.94 5010.47 175.00 2.021 52 45.53 4838.78 175.85 4862.57 80.62 5015.43 180.10 2.021 53 47.63 4838.79 176.90 4862.51 82.99 5010.18 175.00 2.021 54 45.53 4838.78 171.64 4862.30 78.73 5010.60 175.00 2.022 55 45.00 4838.78 170.06 4862.20 77.52 5010.73 175.00 2.022 56 45.00 4838.78 174.27 4862.47 79.41 5015.56 180.10 2.023 57 47.11 4838.79 175.32 4862.53 81.64 5010.35 175.00 2.024 58 46.05 4838.78 172.69 4862.37 79.58 5010.54 175.00 2.024 59 45.53 4838.78 174.79 4862.50 79.90 5015.57 180.10 2.024 60 45.00 4838.78 169.53 4862.17 77.16 5010.80 175.00 2.024 61 45.53 4838.78 175.32 4862.53 80.26 5015.50 180.10 2.024 62 45.00 4838.78 170.58 4862.23 77.88 5010.66 175.00 2.025 63 47.11 4838.79 175.85 4862.57 82.00 5010.27 175.00 2.025 64 47.11 4838.79 176.37 4862.60 81.36 5015.60 180.10 2.025 65 45.00 4838.78 168.48 4862.10 76.43 5010.93 175.00 2.025 66 45.53 4838.78 176.37 4862.60 80.00 5020.75 185.20 2.025 67 46.58 4838.79 173.74 4862.43 80.43 5010.48 175.00 2.025 68 45.53 4838.78 171.11 4862.27 78.37 5010.67 175.00 2.026 69 46.58 4838.79 176.90 4862.51 81.74 5015.42 180.10 2.026 70 45.00 4838.78 169.01 4862.13 76.79 5010.87 175.00 2.026 71 45.00 4838.78 173.74 4862.43 79.05 5015.63 180.10 2.027 72 47.11 4838.79 174.79 4862.50 81.28 5010.42 175.00 2.027 73 45.53 4838.78 169.53 4862.17 77.28 5010.88 175.00 2.027 74 47.11 4838.79 174.27 4862.47 80.92 5010.49 175.00 2.027 75 46.05 4838.78 172.16 4862.33 79.22 5010.61 175.00 2.028 76 48.68 4838.79 176.37 4862.60 82.75 5010.45 175.00 2.028 77 45.00 4838.78 166.90 4862.00 75.33 5011.13 175.00 2.029 78 46.58 4838.79 173.22 4862.40 80.07 5010.55 175.00 2.029 79 45.00 4838.78 167.95 4862.07 76.06 5011.00 175.00 2.029 80 45.53 4838.78 170.06 4862.20 77.64 5010.81 175.00 2.029 81 46.05 4838.78 175.85 4862.57 80.75 5015.51 180.10 2.029 82 45.00 4838.78 176.90 4862.51 80.38 5020.57 185.20 2.029 83 46.05 4838.78 171.64 4862.30 78.86 5010.68 175.00 2.029 84 47.63 4838.79 175.85 4862.57 82.13 5010.36 175.00 2.030 85 45.00 4838.78 173.22 4862.40 78.69 5015.70 180.10 2.030 86 48.16 4838.79 176.90 4862.51 83.12 5010.26 175.00 2.030 87 45.00 4838.78 167.43 4862.03 75.70 5011.07 175.00 2.030 88 45.53 4838.78 174.27 4862.47 79.54 5015.64 180.10 2.031 89 45.53 4838.78 169.01 4862.13 76.92 5010.94 175.00 2.031 90 46.58 4838.79 172.69 4862.37 79.71 5010.62 175.00 2.031 91 47.63 4838.79 175.32 4862.53 81.77 5010.43 175.00 2.032 92 46.05 4838.78 171.11 4862.27 78.50 5010.75 175.00 2.032 93 46.05 4838.78 175.32 4862.53 80.39 5015.58 180.10 2.032 94 46.05 4838.78 170.06 4862.20 77.77 5010.89 175.00 2.033 95 46.05 4838.78 176.37 4862.60 80.12 5020.83 185.20 2.033 96 45.00 4838.78 172.69 4862.37 78.33 5015.77 180.10 2.033 97 47.63 4838.79 176.37 4862.60 81.49 5015.68 180.10 2.033 98 46.05 4838.78 174.79 4862.50 80.03 5015.65 180.10 2.033 99 47.11 4838.79 173.74 4862.43 80.56 5010.56 175.00 2.033 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4838.78 XR: 176.37 YR: 4862.60 Centre: XC: 81.83 YC: 5009.86 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4838.78 52.08 4837.41 59.21 4836.33 66.37 4835.54 73.56 4835.06 80.77 4834.86 87.98 4834.97 95.18 4835.37 102.35 4836.07 109.49 4837.06 116.59 4838.35 123.62 4839.92 130.59 4841.79 137.47 4843.94 144.25 4846.37 150.93 4849.08 157.50 4852.07 163.93 4855.32 170.23 4858.83 176.37 4862.60 Slice Geometry and Properties - Critical Failure Surface (circle 1, 45 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.62 -11.0 2.50 2.55 1 50.00 25.0 71.03 39.26 34.18 1.07 2 47.50 1.85 -11.0 2.50 2.55 1 50.00 25.0 213.24 117.86 92.31 1.07 3 50.00 3.19 -11.0 2.08 2.12 1 50.00 25.0 367.51 158.88 186.92 1.07 4 52.08 10.51 -8.6 3.56 3.60 1 50.00 25.0 1210.46 384.19 352.24 1.05 5 55.64 16.66 -8.6 3.56 3.60 1 50.00 25.0 1920.84 515.43 557.60 1.05 6 59.21 21.35 -6.2 3.39 3.41 1 50.00 25.0 2461.86 594.32 742.69 1.03 7 62.60 29.71 -6.2 3.77 3.79 1 50.00 25.0 3390.21 763.48 920.17 1.03 8 66.37 33.93 -3.9 3.60 3.60 1 50.00 25.0 3812.25 809.33 1075.42 1.02 9 69.97 39.12 -3.9 3.60 3.60 1 50.00 25.0 4346.80 874.12 1226.16 1.02 10 73.56 44.13 -1.5 3.60 3.60 1 50.00 25.0 4860.16 922.23 1356.40 1.01 11 77.17 48.81 -1.5 3.60 3.60 1 50.00 25.0 5335.01 953.75 1488.92 1.01 12 80.77 42.72 0.8 2.91 2.91 1 50.00 25.0 4641.89 783.24 1587.92 1.00 13 83.69 45.42 0.8 2.91 2.91 1 50.00 25.0 4912.11 782.00 1680.33 1.00 14 86.60 22.46 0.8 1.38 1.38 1 50.00 25.0 2425.32 369.87 1751.89 1.00 15 87.98 61.15 3.2 3.60 3.60 1 50.00 25.0 6623.92 947.82 1818.57 0.99 16 91.58 64.74 3.2 3.60 3.60 1 50.00 25.0 7039.55 912.56 1932.43 0.99 17 95.18 67.85 5.6 3.59 3.60 1 50.00 25.0 7400.31 860.62 2019.31 0.98 18 98.77 70.89 5.6 3.59 3.60 1 50.00 25.0 7751.75 791.87 2114.64 0.98 19 102.35 73.30 7.9 3.57 3.60 1 50.00 25.0 8032.61 706.64 2181.13 0.98 20 105.92 75.77 7.9 3.57 3.60 1 50.00 25.0 8319.59 604.71 2258.13 0.98 21 109.49 23.94 10.3 1.11 1.12 1 50.00 25.0 2631.40 166.09 2284.27 0.97 22 110.60 65.77 10.3 2.99 3.04 1 50.00 25.0 7212.40 384.02 2310.74 0.97 23 113.59 67.13 10.3 2.99 3.04 1 50.00 25.0 7325.76 287.78 2345.75 0.97 24 116.59 53.03 12.6 2.36 2.42 1 50.00 25.0 5767.30 152.66 2321.43 0.97 25 118.95 78.61 12.6 3.60 3.69 2 10.00 35.0 8513.68 87.72 2193.24 0.95 26 122.54 23.07 12.6 1.08 1.11 2 10.00 35.0 2487.95 0.00 2132.23 0.95 27 123.62 72.36 15.0 3.48 3.60 2 10.00 35.0 7789.63 0.00 2041.92 0.95 28 127.10 69.21 15.0 3.48 3.60 2 10.00 35.0 7426.37 0.00 1946.55 0.95 29 130.59 72.89 17.4 3.87 4.05 2 10.00 35.0 7788.30 0.00 1810.60 0.94 30 134.46 53.58 17.4 3.01 3.16 1 50.00 25.0 5719.65 0.00 1761.23 0.98 31 137.47 49.33 19.7 2.93 3.12 1 50.00 25.0 5284.92 0.00 1653.03 0.98 32 140.40 15.11 19.7 0.94 0.99 3 0.00 45.0 1510.51 0.00 1366.02 0.90 33 141.34 32.20 19.7 2.06 2.19 3 0.00 45.0 3336.24 768.35 1421.86 0.90 34 143.40 12.89 19.7 0.85 0.91 1 50.00 25.0 1532.93 627.07 1700.76 0.98 35 144.25 47.85 22.1 3.34 3.60 1 50.00 25.0 5698.87 2305.09 1603.52 0.98 36 147.59 43.65 22.1 3.34 3.60 1 50.00 25.0 5211.65 2000.43 1462.99 0.98 37 150.93 48.68 24.4 4.22 4.63 1 50.00 25.0 5833.49 2097.77 1282.79 0.99 38 155.15 23.82 24.4 2.35 2.58 2 10.00 35.0 2847.82 927.44 1093.20 0.95 39 157.50 28.60 26.8 3.22 3.60 2 10.00 35.0 3368.68 994.36 927.70 0.95 40 160.72 23.68 26.8 3.22 3.60 2 10.00 35.0 2719.73 628.79 741.21 0.95 41 163.93 17.24 29.2 2.97 3.40 2 10.00 35.0 1902.83 244.96 544.89 0.96 42 166.90 2.86 29.2 0.59 0.67 2 10.00 35.0 304.19 6.85 432.33 0.96 43 167.49 11.13 29.2 2.74 3.14 2 10.00 35.0 1151.37 0.00 348.22 0.96 44 170.23 7.79 31.5 3.07 3.60 1 50.00 25.0 778.98 0.00 207.87 1.02 45 173.30 2.60 -90.0 3.10 4860.41 1 50.00 25.0 259.66 0.00 -107.74 -4.25 X-S Area: 1721.18 Path Length: 4993.78 X-S Weight: 189540.70 Reclaimed Conditions Rim Northern Colorado Constructors, Inc.—NCCI Pit#1 J&T Consulting, Inc. Slope Stability Analysis GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NWl-Rec.gmf Processed: 21 Jan 2026 09:01:46 DATA: Analysis 1 - Slope Stability - Case NW-1 - Reclaimed Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4861.00 336.90 4861.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 135.40 4857.80 138.40 4857.80 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4855.00 135.40 4855.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 138.40 4855.00 336.90 4855.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4836.50 50.00 4837.00 135.40 4837.90 Profile: 6 (3 points) Material beneath: 1 - Clay 138.40 4837.90 232.80 4839.00 336.90 4839.00 Profile: 7 (2 points) Material beneath: 1 - Clay 135.40 4834.90 138.40 4834.90 Slope Surface (9 points) 0.00 4836.50 50.00 4837.00 111.90 4857.70 135.40 4857.80 138.40 4857.80 224.40 4858.00 238.30 4859.60 286.90 4860.70 336.90 4860.80 Phreatic Surface (5 points) 0.00 4836.50 50.00 4837.00 135.40 4847.90 138.40 4855.20 336.90 4855.20 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4837.00 XR: 291.90 YR: 4860.71 Centre: XC: 103.70 YC: 5534.94 Radius: R: 700.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 400.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-1 - Reclaimed Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 4.845 Analysis Summary There were: 20001 successful analyses from a total of 20001 trial failure surfaces Critical (minimum) Factor of Safety: 4.28 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4836.95 286.90 4860.70 118.56 5331.51 500.00 4.280 <-- Critical Surface 2 45.00 4836.95 287.43 4860.70 118.93 5331.45 500.00 4.286 3 45.00 4836.95 287.95 4860.70 119.30 5331.40 500.00 4.292 4 45.00 4836.95 286.90 4860.70 117.74 5339.88 508.16 4.294 5 45.53 4836.96 286.90 4860.70 118.72 5331.57 500.00 4.294 6 45.00 4836.95 288.48 4860.70 119.67 5331.34 500.00 4.298 7 45.53 4836.96 287.43 4860.70 119.09 5331.51 500.00 4.300 8 45.00 4836.95 287.43 4860.70 118.11 5339.83 508.16 4.300 9 45.00 4836.95 289.01 4860.70 120.03 5331.29 500.00 4.303 10 45.53 4836.96 287.95 4860.70 119.46 5331.46 500.00 4.305 11 45.00 4836.95 287.95 4860.70 118.48 5339.77 508.16 4.306 12 45.53 4836.96 286.90 4860.70 117.90 5339.94 508.16 4.307 13 46.05 4836.96 286.90 4860.70 118.89 5331.63 500.00 4.308 14 45.00 4836.95 289.53 4860.71 120.40 5331.23 500.00 4.309 15 45.00 4836.95 286.90 4860.70 116.92 5348.24 516.33 4.310 16 45.53 4836.96 288.48 4860.70 119.83 5331.40 500.00 4.311 17 45.00 4836.95 288.48 4860.70 118.85 5339.72 508.16 4.311 18 45.53 4836.96 287.43 4860.70 118.27 5339.88 508.16 4.313 19 46.05 4836.96 287.43 4860.70 119.26 5331.57 500.00 4.313 20 45.00 4836.95 290.06 4860.71 120.77 5331.18 500.00 4.315 21 45.00 4836.95 289.01 4860.70 119.22 5339.66 508.16 4.316 22 45.53 4836.96 289.01 4860.70 120.20 5331.35 500.00 4.317 23 45.53 4836.96 287.95 4860.70 118.64 5339.83 508.16 4.319 24 45.00 4836.95 287.43 4860.70 117.29 5348.19 516.33 4.319 25 45.00 4836.95 287.95 4860.70 117.66 5348.14 516.33 4.319 26 46.05 4836.96 287.95 4860.70 119.63 5331.52 500.00 4.319 27 45.00 4836.95 290.58 4860.71 121.14 5331.12 500.00 4.320 28 46.05 4836.96 286.90 4860.70 118.06 5340.00 508.16 4.321 29 45.53 4836.96 286.90 4860.70 117.08 5348.30 516.33 4.321 30 46.58 4836.97 286.90 4860.70 119.05 5331.69 500.00 4.321 31 45.00 4836.95 286.90 4860.70 116.10 5356.60 524.49 4.322 32 45.00 4836.95 289.53 4860.71 119.59 5339.61 508.16 4.322 33 45.53 4836.96 289.53 4860.71 120.57 5331.29 500.00 4.322 34 45.53 4836.96 288.48 4860.70 119.01 5339.78 508.16 4.324 35 45.00 4836.95 288.48 4860.70 118.03 5348.09 516.33 4.324 36 46.05 4836.96 288.48 4860.70 120.00 5331.46 500.00 4.325 37 45.00 4836.95 291.11 4860.71 121.50 5331.06 500.00 4.326 38 46.05 4836.96 287.43 4860.70 118.44 5339.94 508.16 4.327 39 45.00 4836.95 287.43 4860.70 116.47 5356.55 524.49 4.327 40 46.58 4836.97 287.43 4860.70 119.42 5331.63 500.00 4.327 41 45.00 4836.95 290.06 4860.71 119.96 5339.55 508.16 4.328 42 45.53 4836.96 290.06 4860.71 120.94 5331.24 500.00 4.328 43 45.53 4836.96 287.43 4860.70 117.45 5348.25 516.33 4.329 44 45.53 4836.96 289.01 4860.70 119.38 5339.72 508.16 4.330 45 45.00 4836.95 289.01 4860.70 118.40 5348.03 516.33 4.330 46 46.05 4836.96 289.01 4860.70 120.37 5331.41 500.00 4.331 47 45.00 4836.95 291.64 4860.71 121.87 5331.01 500.00 4.332 48 46.05 4836.96 287.95 4860.70 118.81 5339.89 508.16 4.332 49 45.00 4836.95 287.95 4860.70 116.84 5356.50 524.49 4.332 50 46.58 4836.97 287.95 4860.70 119.79 5331.58 500.00 4.333 51 45.00 4836.95 290.58 4860.71 120.33 5339.50 508.16 4.334 52 45.53 4836.96 290.58 4860.71 121.30 5331.18 500.00 4.334 53 46.05 4836.96 286.90 4860.70 117.24 5348.36 516.33 4.334 54 47.11 4836.97 286.90 4860.70 119.22 5331.74 500.00 4.335 55 45.53 4836.96 286.90 4860.70 116.26 5356.65 524.49 4.336 56 45.53 4836.96 289.53 4860.71 119.75 5339.67 508.16 4.336 57 45.00 4836.95 289.53 4860.71 118.78 5347.98 516.33 4.336 58 46.05 4836.96 289.53 4860.71 120.73 5331.35 500.00 4.336 59 45.00 4836.95 286.90 4860.70 115.28 5364.95 532.65 4.337 60 45.00 4836.95 292.16 4860.71 122.23 5330.95 500.00 4.337 61 45.53 4836.96 288.48 4860.70 118.20 5348.14 516.33 4.337 62 46.05 4836.96 288.48 4860.70 119.18 5339.83 508.16 4.338 63 45.53 4836.96 287.95 4860.70 117.82 5348.19 516.33 4.338 64 46.58 4836.97 288.48 4860.70 120.16 5331.52 500.00 4.338 65 46.58 4836.97 286.90 4860.70 118.23 5340.05 508.16 4.339 66 45.00 4836.95 288.48 4860.70 117.22 5356.44 524.49 4.339 67 45.00 4836.95 291.11 4860.71 120.69 5339.44 508.16 4.339 68 45.53 4836.96 291.11 4860.71 121.67 5331.12 500.00 4.340 69 46.58 4836.97 287.43 4860.70 118.60 5340.00 508.16 4.340 70 46.05 4836.96 287.43 4860.70 117.61 5348.30 516.33 4.340 71 45.53 4836.96 287.43 4860.70 116.63 5356.60 524.49 4.340 72 47.11 4836.97 287.43 4860.70 119.59 5331.69 500.00 4.341 73 45.00 4836.95 290.06 4860.71 119.15 5347.93 516.33 4.341 74 45.53 4836.96 290.06 4860.71 120.12 5339.61 508.16 4.341 75 45.00 4836.95 287.43 4860.70 115.65 5364.90 532.65 4.342 76 46.05 4836.96 290.06 4860.71 121.10 5331.30 500.00 4.342 77 45.53 4836.96 289.01 4860.70 118.57 5348.09 516.33 4.343 78 45.00 4836.95 292.69 4860.71 122.60 5330.89 500.00 4.343 79 46.05 4836.96 289.01 4860.70 119.55 5339.78 508.16 4.344 80 46.58 4836.97 289.01 4860.70 120.53 5331.47 500.00 4.345 81 45.00 4836.95 291.64 4860.71 121.06 5339.39 508.16 4.345 82 45.53 4836.96 291.64 4860.71 122.04 5331.07 500.00 4.346 83 45.53 4836.96 287.95 4860.70 117.01 5356.55 524.49 4.346 84 46.58 4836.97 287.95 4860.70 118.97 5339.95 508.16 4.346 85 47.11 4836.97 287.95 4860.70 119.96 5331.64 500.00 4.347 86 45.00 4836.95 290.58 4860.71 119.52 5347.87 516.33 4.347 87 45.53 4836.96 290.58 4860.71 120.49 5339.56 508.16 4.347 88 45.00 4836.95 287.95 4860.70 116.03 5364.85 532.65 4.347 89 45.00 4836.95 289.01 4860.70 117.59 5356.39 524.49 4.347 90 46.58 4836.97 286.90 4860.70 117.40 5348.41 516.33 4.348 91 46.05 4836.96 290.58 4860.71 121.47 5331.24 500.00 4.348 92 46.05 4836.96 287.95 4860.70 117.99 5348.25 516.33 4.348 93 45.53 4836.96 289.53 4860.71 118.94 5348.04 516.33 4.349 94 45.00 4836.95 289.53 4860.71 117.96 5356.34 524.49 4.349 95 47.63 4836.98 286.90 4860.70 119.38 5331.80 500.00 4.349 96 46.05 4836.96 286.90 4860.70 116.42 5356.71 524.49 4.349 97 46.05 4836.96 289.53 4860.71 119.92 5339.73 508.16 4.349 98 47.11 4836.97 286.90 4860.70 118.39 5340.11 508.16 4.350 99 45.53 4836.96 286.90 4860.70 115.43 5365.00 532.65 4.350 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4836.95 XR: 286.90 YR: 4860.70 Centre: XC: 118.56 YC: 5331.51 Radius: R: 500.00 Generated failure surface: (20 points) 45.00 4836.95 57.81 4835.21 70.65 4833.81 83.53 4832.74 96.43 4832.00 109.34 4831.59 122.27 4831.52 135.19 4831.79 148.09 4832.38 160.98 4833.31 173.84 4834.58 186.66 4836.17 199.44 4838.10 212.17 4840.35 224.83 4842.93 237.42 4845.84 249.93 4849.08 262.35 4852.63 274.68 4856.51 286.90 4860.70 Slice Geometry and Properties - Critical Failure Surface (circle 1, 41 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.82 -7.7 5.00 5.05 1 50.00 25.0 209.17 114.53 43.73 1.02 2 50.00 19.99 -7.7 7.81 7.88 1 50.00 25.0 2352.70 862.27 305.91 1.02 3 57.81 37.38 -6.2 6.42 6.46 1 50.00 25.0 4423.23 1428.20 695.62 1.02 4 64.23 55.69 -6.2 6.42 6.46 1 50.00 25.0 6600.73 2041.61 1037.59 1.02 5 70.65 73.66 -4.8 6.44 6.46 1 50.00 25.0 8740.44 2622.10 1367.20 1.01 6 77.09 90.97 -4.8 6.44 6.46 1 50.00 25.0 10804.26 3169.34 1689.89 1.01 7 83.53 107.96 -3.3 6.45 6.46 1 50.00 25.0 12831.34 3683.60 1998.82 1.01 8 89.98 124.26 -3.3 6.45 6.46 1 50.00 25.0 14778.83 4164.51 2302.16 1.01 9 96.43 161.84 -1.8 7.40 7.40 1 50.00 25.0 19263.35 5317.33 2611.00 1.00 10 103.83 133.78 -1.8 5.52 5.52 1 50.00 25.0 15856.39 4320.64 2880.89 1.00 11 109.34 65.65 -0.3 2.56 2.56 1 50.00 25.0 7734.79 2097.27 3027.56 1.00 12 111.90 135.50 -0.3 5.18 5.18 1 50.00 25.0 15959.27 4419.50 3080.62 1.00 13 117.08 135.77 -0.3 5.18 5.18 1 50.00 25.0 16034.96 4642.64 3095.23 1.00 14 122.27 169.04 1.2 6.46 6.46 1 50.00 25.0 20029.10 6066.36 3095.64 1.00 15 128.73 168.37 1.2 6.46 6.46 1 50.00 25.0 20022.16 6345.70 3094.67 1.00 16 135.19 83.39 2.6 3.21 3.22 1 50.00 25.0 9012.96 3901.74 2794.93 1.00 17 138.40 124.84 2.6 4.85 4.85 1 50.00 25.0 15408.15 7009.50 3170.02 1.00 18 143.25 123.81 2.6 4.85 4.85 1 50.00 25.0 15284.57 6941.65 3144.58 1.00 19 148.09 162.49 4.1 6.44 6.46 1 50.00 25.0 20070.48 9105.44 3100.37 0.99 20 154.54 159.59 4.1 6.44 6.46 1 50.00 25.0 19728.17 8918.03 3047.43 0.99 21 160.98 155.81 5.6 6.43 6.46 1 50.00 25.0 19281.83 8696.98 2980.08 0.99 22 167.41 151.85 5.6 6.43 6.46 1 50.00 25.0 18817.46 8442.42 2908.21 0.99 23 173.84 146.92 7.1 6.41 6.46 1 50.00 25.0 18238.96 8154.43 2822.10 0.99 24 180.25 141.91 7.1 6.41 6.46 1 50.00 25.0 17653.96 7833.18 2731.41 0.99 25 186.66 135.88 8.6 6.39 6.46 1 50.00 25.0 16946.65 7478.26 2626.65 0.99 26 193.05 129.83 8.6 6.39 6.46 1 50.00 25.0 16242.11 7090.17 2517.20 0.99 27 199.44 61.01 10.0 3.12 3.17 1 50.00 25.0 7652.90 3323.97 2426.71 1.00 28 202.56 90.69 10.1 4.80 4.88 2 10.00 35.0 11378.77 4909.05 2330.13 0.99 29 207.36 86.66 10.0 4.80 4.88 2 10.00 35.0 10852.69 4649.89 2222.23 0.99 30 212.17 104.02 11.5 6.12 6.24 2 10.00 35.0 12994.15 5542.10 2083.82 0.99 31 218.28 96.47 11.5 6.12 6.24 2 10.00 35.0 12010.30 5055.88 1925.67 0.99 32 224.40 96.25 12.9 6.51 6.68 2 10.00 35.0 11872.95 4839.09 1783.96 0.99 33 230.91 91.34 13.0 6.51 6.68 2 10.00 35.0 11088.34 4214.13 1664.07 0.99 34 237.42 81.32 14.5 6.26 6.46 2 10.00 35.0 9717.60 3446.76 1511.52 0.99 35 243.67 72.09 14.5 6.26 6.46 2 10.00 35.0 8491.47 2795.02 1319.36 0.99 36 249.93 61.92 16.0 6.21 6.46 2 10.00 35.0 7148.92 2110.66 1113.43 0.99 37 256.14 51.75 16.0 6.21 6.46 2 10.00 35.0 5800.29 1393.72 901.06 0.99 38 262.35 48.31 17.5 7.53 7.90 2 10.00 35.0 5121.63 682.05 650.20 1.00 39 269.88 22.13 17.5 4.79 5.03 1 50.00 25.0 2212.74 0.00 442.69 1.01 40 274.68 17.95 18.9 6.11 6.46 1 50.00 25.0 1794.87 0.00 279.26 1.02 41 280.79 5.98 18.9 6.11 6.46 1 50.00 25.0 598.29 0.00 90.51 1.02 X-S Area: 3985.88 Path Length: 245.52 X-S Weight: 481061.97 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NWl-Rec-EQ.gmf Processed: 21 Jan 2026 09:03:09 DATA: Analysis 1 - Slope Stability - Case NW-1 - Reclaimed Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4861.00 336.90 4861.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 135.40 4857.80 138.40 4857.80 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4855.00 135.40 4855.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 138.40 4855.00 336.90 4855.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4836.50 50.00 4837.00 135.40 4837.90 Profile: 6 (3 points) Material beneath: 1 - Clay 138.40 4837.90 232.80 4839.00 336.90 4839.00 Profile: 7 (2 points) Material beneath: 1 - Clay 135.40 4834.90 138.40 4834.90 Slope Surface (9 points) 0.00 4836.50 50.00 4837.00 111.90 4857.70 135.40 4857.80 138.40 4857.80 224.40 4858.00 238.30 4859.60 286.90 4860.70 336.90 4860.80 Phreatic Surface (5 points) 0.00 4836.50 50.00 4837.00 135.40 4847.90 138.40 4855.20 336.90 4855.20 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4837.00 XR: 291.90 YR: 4860.71 Centre: XC: 103.70 YC: 5534.94 Radius: R: 700.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 400.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-1 - Reclaimed Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.550 Analysis Summary There were: 20001 successful analyses from a total of 20001 trial failure surfaces Critical (minimum) Factor of Safety: 2.27 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4836.95 286.90 4860.70 118.56 5331.51 500.00 2.273 <-- Critical Surface 2 45.00 4836.95 287.43 4860.70 118.93 5331.45 500.00 2.273 3 45.00 4836.95 287.95 4860.70 119.30 5331.40 500.00 2.274 4 45.00 4836.95 288.48 4860.70 119.67 5331.34 500.00 2.274 5 45.00 4836.95 289.01 4860.70 120.03 5331.29 500.00 2.274 6 45.00 4836.95 289.53 4860.71 120.40 5331.23 500.00 2.275 7 45.00 4836.95 290.06 4860.71 120.77 5331.18 500.00 2.275 8 45.00 4836.95 290.58 4860.71 121.14 5331.12 500.00 2.276 9 45.00 4836.95 291.11 4860.71 121.50 5331.06 500.00 2.276 10 45.00 4836.95 291.64 4860.71 121.87 5331.01 500.00 2.276 11 45.00 4836.95 292.16 4860.71 122.23 5330.95 500.00 2.277 12 45.00 4836.95 292.69 4860.71 122.60 5330.89 500.00 2.277 13 45.53 4836.96 286.90 4860.70 118.72 5331.57 500.00 2.278 14 45.53 4836.96 287.43 4860.70 119.09 5331.51 500.00 2.278 15 45.00 4836.95 293.22 4860.71 122.96 5330.83 500.00 2.278 16 45.00 4836.95 293.74 4860.71 123.33 5330.78 500.00 2.279 17 45.53 4836.96 287.95 4860.70 119.46 5331.46 500.00 2.279 18 45.00 4836.95 294.27 4860.71 123.69 5330.72 500.00 2.279 19 45.53 4836.96 288.48 4860.70 119.83 5331.40 500.00 2.279 20 45.00 4836.95 294.79 4860.72 124.06 5330.66 500.00 2.279 21 45.53 4836.96 289.01 4860.70 120.20 5331.35 500.00 2.279 22 45.00 4836.95 295.32 4860.72 124.42 5330.60 500.00 2.280 23 45.53 4836.96 289.53 4860.71 120.57 5331.29 500.00 2.280 24 45.00 4836.95 295.85 4860.72 124.78 5330.54 500.00 2.280 25 45.53 4836.96 290.06 4860.71 120.94 5331.24 500.00 2.280 26 45.00 4836.95 296.37 4860.72 125.14 5330.49 500.00 2.280 27 45.53 4836.96 290.58 4860.71 121.30 5331.18 500.00 2.281 28 45.00 4836.95 286.90 4860.70 117.74 5339.88 508.16 2.281 29 45.53 4836.96 291.11 4860.71 121.67 5331.12 500.00 2.281 30 45.00 4836.95 296.90 4860.72 125.51 5330.43 500.00 2.281 31 45.00 4836.95 287.43 4860.70 118.11 5339.83 508.16 2.281 32 45.53 4836.96 291.64 4860.71 122.04 5331.07 500.00 2.281 33 45.00 4836.95 287.95 4860.70 118.48 5339.77 508.16 2.282 34 45.00 4836.95 288.48 4860.70 118.85 5339.72 508.16 2.282 35 45.53 4836.96 292.16 4860.71 122.40 5331.01 500.00 2.282 36 45.00 4836.95 289.01 4860.70 119.22 5339.66 508.16 2.282 37 45.53 4836.96 292.69 4860.71 122.77 5330.95 500.00 2.283 38 46.05 4836.96 286.90 4860.70 118.89 5331.63 500.00 2.283 39 45.00 4836.95 289.53 4860.71 119.59 5339.61 508.16 2.283 40 45.53 4836.96 293.22 4860.71 123.13 5330.90 500.00 2.283 41 45.00 4836.95 290.06 4860.71 119.96 5339.55 508.16 2.283 42 46.05 4836.96 287.43 4860.70 119.26 5331.57 500.00 2.283 43 45.53 4836.96 293.74 4860.71 123.50 5330.84 500.00 2.283 44 45.00 4836.95 290.58 4860.71 120.33 5339.50 508.16 2.284 45 46.05 4836.96 287.95 4860.70 119.63 5331.52 500.00 2.284 46 45.53 4836.96 294.27 4860.71 123.86 5330.78 500.00 2.284 47 46.05 4836.96 288.48 4860.70 120.00 5331.46 500.00 2.284 48 45.00 4836.95 291.11 4860.71 120.69 5339.44 508.16 2.284 49 45.53 4836.96 294.79 4860.72 124.23 5330.72 500.00 2.284 50 45.00 4836.95 291.64 4860.71 121.06 5339.39 508.16 2.284 51 46.05 4836.96 289.01 4860.70 120.37 5331.41 500.00 2.284 52 45.53 4836.96 295.32 4860.72 124.59 5330.66 500.00 2.284 53 46.05 4836.96 289.53 4860.71 120.73 5331.35 500.00 2.285 54 45.00 4836.95 292.16 4860.71 121.43 5339.33 508.16 2.285 55 45.53 4836.96 295.85 4860.72 124.95 5330.61 500.00 2.285 56 45.00 4836.95 292.69 4860.71 121.79 5339.28 508.16 2.285 57 46.05 4836.96 290.06 4860.71 121.10 5331.30 500.00 2.285 58 46.05 4836.96 290.58 4860.71 121.47 5331.24 500.00 2.286 59 45.53 4836.96 296.37 4860.72 125.31 5330.55 500.00 2.286 60 45.53 4836.96 286.90 4860.70 117.90 5339.94 508.16 2.286 61 46.05 4836.96 291.11 4860.71 121.84 5331.18 500.00 2.286 62 45.53 4836.96 296.90 4860.72 125.68 5330.49 500.00 2.286 63 45.00 4836.95 293.22 4860.71 122.16 5339.22 508.16 2.286 64 45.53 4836.96 287.43 4860.70 118.27 5339.88 508.16 2.286 65 45.00 4836.95 293.74 4860.71 122.53 5339.17 508.16 2.286 66 45.53 4836.96 287.95 4860.70 118.64 5339.83 508.16 2.287 67 45.00 4836.95 294.27 4860.71 122.89 5339.11 508.16 2.287 68 45.53 4836.96 288.48 4860.70 119.01 5339.78 508.16 2.287 69 46.05 4836.96 291.64 4860.71 122.21 5331.13 500.00 2.287 70 45.00 4836.95 294.79 4860.72 123.26 5339.05 508.16 2.287 71 45.53 4836.96 289.01 4860.70 119.38 5339.72 508.16 2.287 72 46.05 4836.96 292.16 4860.71 122.57 5331.07 500.00 2.287 73 45.00 4836.95 295.32 4860.72 123.62 5338.99 508.16 2.287 74 46.05 4836.96 292.69 4860.71 122.94 5331.01 500.00 2.288 75 45.53 4836.96 289.53 4860.71 119.75 5339.67 508.16 2.288 76 45.00 4836.95 295.85 4860.72 123.99 5338.94 508.16 2.288 77 46.58 4836.97 286.90 4860.70 119.05 5331.69 500.00 2.288 78 46.05 4836.96 293.22 4860.71 123.30 5330.96 500.00 2.288 79 45.53 4836.96 290.06 4860.71 120.12 5339.61 508.16 2.288 80 46.58 4836.97 287.43 4860.70 119.42 5331.63 500.00 2.288 81 46.05 4836.96 293.74 4860.71 123.67 5330.90 500.00 2.288 82 45.00 4836.95 296.37 4860.72 124.35 5338.88 508.16 2.288 83 45.53 4836.96 290.58 4860.71 120.49 5339.56 508.16 2.288 84 46.58 4836.97 287.95 4860.70 119.79 5331.58 500.00 2.288 85 46.05 4836.96 294.27 4860.71 124.03 5330.84 500.00 2.289 86 45.00 4836.95 296.90 4860.72 124.71 5338.82 508.16 2.289 87 45.53 4836.96 291.11 4860.71 120.86 5339.50 508.16 2.289 88 46.58 4836.97 288.48 4860.70 120.16 5331.52 500.00 2.289 89 46.05 4836.96 294.79 4860.72 124.40 5330.78 500.00 2.289 90 45.53 4836.96 291.64 4860.71 121.23 5339.45 508.16 2.289 91 46.58 4836.97 289.01 4860.70 120.53 5331.47 500.00 2.289 92 46.05 4836.96 295.32 4860.72 124.76 5330.73 500.00 2.290 93 45.00 4836.95 287.95 4860.70 117.66 5348.14 516.33 2.290 94 46.58 4836.97 289.53 4860.71 120.90 5331.41 500.00 2.290 95 45.00 4836.95 288.48 4860.70 118.03 5348.09 516.33 2.290 96 46.58 4836.97 290.06 4860.71 121.27 5331.36 500.00 2.290 97 46.05 4836.96 295.85 4860.72 125.12 5330.67 500.00 2.290 98 45.53 4836.96 292.16 4860.71 121.60 5339.39 508.16 2.290 99 45.00 4836.95 289.01 4860.70 118.40 5348.03 516.33 2.290 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4836.95 XR: 286.90 YR: 4860.70 Centre: XC: 118.56 YC: 5331.51 Radius: R: 500.00 Generated failure surface: (20 points) 45.00 4836.95 57.81 4835.21 70.65 4833.81 83.53 4832.74 96.43 4832.00 109.34 4831.59 122.27 4831.52 135.19 4831.79 148.09 4832.38 160.98 4833.31 173.84 4834.58 186.66 4836.17 199.44 4838.10 212.17 4840.35 224.83 4842.93 237.42 4845.84 249.93 4849.08 262.35 4852.63 274.68 4856.51 286.90 4860.70 Slice Geometry and Properties - Critical Failure Surface (circle 1, 41 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.82 -7.7 5.00 5.05 1 50.00 25.0 209.17 114.53 45.45 1.04 2 50.00 19.99 -7.7 7.81 7.88 1 50.00 25.0 2352.70 862.27 309.99 1.04 3 57.81 37.38 -6.2 6.42 6.46 1 50.00 25.0 4423.23 1428.20 701.88 1.03 4 64.23 55.69 -6.2 6.42 6.46 1 50.00 25.0 6600.73 2041.61 1046.51 1.03 5 70.65 73.66 -4.8 6.44 6.46 1 50.00 25.0 8740.44 2622.10 1375.91 1.02 6 77.09 90.97 -4.8 6.44 6.46 1 50.00 25.0 10804.26 3169.34 1700.53 1.02 7 83.53 107.96 -3.3 6.45 6.46 1 50.00 25.0 12831.34 3683.60 2007.39 1.01 8 89.98 124.26 -3.3 6.45 6.46 1 50.00 25.0 14778.83 4164.51 2311.99 1.01 9 96.43 161.84 -1.8 7.40 7.40 1 50.00 25.0 19263.35 5317.33 2617.07 1.01 10 103.83 133.78 -1.8 5.52 5.52 1 50.00 25.0 15856.39 4320.64 2887.60 1.01 11 109.34 65.65 -0.3 2.56 2.56 1 50.00 25.0 7734.79 2097.27 3028.79 1.00 12 111.90 135.50 -0.3 5.18 5.18 1 50.00 25.0 15959.27 4419.50 3081.85 1.00 13 117.08 135.77 -0.3 5.18 5.18 1 50.00 25.0 16034.96 4642.64 3096.47 1.00 14 122.27 169.04 1.2 6.46 6.46 1 50.00 25.0 20029.10 6066.36 3091.23 1.00 15 128.73 168.37 1.2 6.46 6.46 1 50.00 25.0 20022.16 6345.70 3090.34 1.00 16 135.19 83.39 2.6 3.21 3.22 1 50.00 25.0 9012.96 3901.74 2787.49 0.99 17 138.40 124.84 2.6 4.85 4.85 1 50.00 25.0 15408.15 7009.50 3161.95 0.99 18 143.25 123.81 2.6 4.85 4.85 1 50.00 25.0 15284.57 6941.65 3136.55 0.99 19 148.09 162.49 4.1 6.44 6.46 1 50.00 25.0 20070.48 9105.44 3088.07 0.99 20 154.54 159.59 4.1 6.44 6.46 1 50.00 25.0 19728.17 8918.03 3035.30 0.99 21 160.98 155.81 5.6 6.43 6.46 1 50.00 25.0 19281.83 8696.98 2963.95 0.98 22 167.41 151.85 5.6 6.43 6.46 1 50.00 25.0 18817.46 8442.42 2892.39 0.98 23 173.84 146.92 7.1 6.41 6.46 1 50.00 25.0 18238.96 8154.43 2802.65 0.98 24 180.25 141.91 7.1 6.41 6.46 1 50.00 25.0 17653.96 7833.18 2712.44 0.98 25 186.66 135.88 8.6 6.39 6.46 1 50.00 25.0 16946.65 7478.26 2604.48 0.98 26 193.05 129.83 8.6 6.39 6.46 1 50.00 25.0 16242.11 7090.17 2495.73 0.98 27 199.44 61.01 10.0 3.12 3.17 1 50.00 25.0 7652.90 3323.97 2402.30 0.98 28 202.56 90.69 10.1 4.80 4.88 2 10.00 35.0 11378.77 4909.05 2297.63 0.96 29 207.36 86.66 10.0 4.80 4.88 2 10.00 35.0 10852.69 4649.89 2191.08 0.96 30 212.17 104.02 11.5 6.12 6.24 2 10.00 35.0 12994.15 5542.10 2050.25 0.96 31 218.28 96.47 11.5 6.12 6.24 2 10.00 35.0 12010.30 5055.88 1894.33 0.96 32 224.40 96.25 12.9 6.51 6.68 2 10.00 35.0 11872.95 4839.09 1750.74 0.96 33 230.91 91.34 13.0 6.51 6.68 2 10.00 35.0 11088.34 4214.13 1631.42 0.96 34 237.42 81.32 14.5 6.26 6.46 2 10.00 35.0 9717.60 3446.76 1477.20 0.96 35 243.67 72.09 14.5 6.26 6.46 2 10.00 35.0 8491.47 2795.02 1288.19 0.96 36 249.93 61.92 16.0 6.21 6.46 2 10.00 35.0 7148.92 2110.66 1082.99 0.96 37 256.14 51.75 16.0 6.21 6.46 2 10.00 35.0 5800.29 1393.72 874.47 0.96 38 262.35 48.31 17.5 7.53 7.90 2 10.00 35.0 5121.63 682.05 626.26 0.96 39 269.88 22.13 17.5 4.79 5.03 1 50.00 25.0 2212.74 0.00 427.06 0.98 40 274.68 17.95 18.9 6.11 6.46 1 50.00 25.0 1794.87 0.00 267.34 0.99 41 280.79 5.98 18.9 6.11 6.46 1 50.00 25.0 598.29 0.00 84.41 0.99 X-S Area: 3985.88 Path Length: 245.52 X-S Weight: 481061.97 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NW2-Rec.gmf Processed: 21 Jan 2026 09:04:54 DATA: Analysis 1 - Slope Stability - Case NW-2 - Reclaimed Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4858.00 219.60 4858.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 138.90 4857.00 141.90 4857.00 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4848.00 138.90 4848.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 141.90 4848.00 219.60 4848.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4835.90 50.00 4835.40 138.90 4834.50 Profile: 6 (3 points) Material beneath: 1 - Clay 141.90 4834.50 160.20 4834.30 219.60 4834.40 Profile: 7 (2 points) Material beneath: 1 - Clay 138.90 4831.50 141.90 4831.50 Slope Surface (10 points) 0.00 4835.90 50.00 4835.40 115.40 4857.20 138.90 4857.00 141.90 4857.00 169.60 4856.80 183.30 4857.00 198.50 4857.20 212.30 4855.20 219.60 4855.00 Phreatic Surface (6 points) 0.00 4835.90 50.00 4835.40 138.90 4842.60 141.90 4855.20 212.30 4855.20 219.60 4855.00 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4835.40 XR: 174.60 YR: 4856.87 Centre: XC: 62.49 YC: 5135.14 Radius: R: 300.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-2 - Reclaimed Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 3.702 Analysis Summary There were: 17124 successful analyses from a total of 20001 trial failure surfaces 2877 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.71 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4835.45 179.60 4856.95 86.88 5005.36 175.00 2.708 <-- Critical Surface 2 45.00 4835.45 179.07 4856.94 86.51 5005.46 175.00 2.712 3 45.00 4835.45 178.55 4856.93 86.14 5005.54 175.00 2.718 4 45.53 4835.44 179.60 4856.95 87.02 5005.45 175.00 2.721 5 45.53 4835.44 179.07 4856.94 86.65 5005.54 175.00 2.725 6 45.00 4835.45 177.49 4856.92 85.40 5005.72 175.00 2.725 7 45.00 4835.45 178.02 4856.92 85.77 5005.63 175.00 2.728 8 45.53 4835.44 178.55 4856.93 86.28 5005.63 175.00 2.729 9 45.00 4835.45 176.97 4856.91 85.03 5005.81 175.00 2.730 10 46.05 4835.44 179.60 4856.95 87.16 5005.54 175.00 2.734 11 45.00 4835.45 176.44 4856.90 84.66 5005.90 175.00 2.734 12 45.53 4835.44 177.49 4856.92 85.54 5005.81 175.00 2.738 13 46.05 4835.44 179.07 4856.94 86.79 5005.63 175.00 2.738 14 45.53 4835.44 178.02 4856.92 85.91 5005.72 175.00 2.738 15 45.00 4835.45 175.92 4856.89 84.28 5005.98 175.00 2.739 16 46.05 4835.44 178.55 4856.93 86.42 5005.72 175.00 2.742 17 45.53 4835.44 176.97 4856.91 85.17 5005.90 175.00 2.743 18 45.00 4835.45 175.39 4856.88 83.91 5006.07 175.00 2.744 19 45.53 4835.44 176.44 4856.90 84.79 5005.98 175.00 2.747 20 46.58 4835.43 179.60 4856.95 87.31 5005.63 175.00 2.747 21 45.00 4835.45 179.60 4856.95 86.01 5010.82 180.10 2.748 22 46.05 4835.44 178.02 4856.92 86.05 5005.81 175.00 2.749 23 45.00 4835.45 174.86 4856.88 83.53 5006.15 175.00 2.749 24 46.05 4835.44 177.49 4856.92 85.68 5005.89 175.00 2.751 25 46.58 4835.43 179.07 4856.94 86.93 5005.72 175.00 2.751 26 45.53 4835.44 175.92 4856.89 84.42 5006.07 175.00 2.752 27 45.00 4835.45 179.07 4856.94 85.64 5010.91 180.10 2.753 28 45.00 4835.45 174.34 4856.87 83.16 5006.24 175.00 2.754 29 46.05 4835.44 176.97 4856.91 85.30 5005.98 175.00 2.755 30 46.58 4835.43 178.55 4856.93 86.56 5005.81 175.00 2.755 31 45.53 4835.44 175.39 4856.88 84.04 5006.15 175.00 2.757 32 45.00 4835.45 178.55 4856.93 85.27 5010.99 180.10 2.760 33 45.00 4835.45 173.81 4856.86 82.78 5006.32 175.00 2.760 34 46.58 4835.43 178.02 4856.92 86.19 5005.89 175.00 2.760 35 46.05 4835.44 176.44 4856.90 84.93 5006.07 175.00 2.760 36 47.11 4835.43 179.60 4856.95 87.45 5005.72 175.00 2.761 37 45.53 4835.44 179.60 4856.95 86.15 5010.91 180.10 2.761 38 45.00 4835.45 178.02 4856.92 84.89 5011.08 180.10 2.762 39 45.53 4835.44 174.86 4856.88 83.67 5006.24 175.00 2.762 40 45.00 4835.45 173.28 4856.85 82.40 5006.41 175.00 2.764 41 47.11 4835.43 179.07 4856.94 87.07 5005.80 175.00 2.765 42 46.05 4835.44 175.92 4856.89 84.56 5006.15 175.00 2.765 43 45.53 4835.44 179.07 4856.94 85.78 5010.99 180.10 2.765 44 45.00 4835.45 177.49 4856.92 84.52 5011.16 180.10 2.766 45 45.53 4835.44 174.34 4856.87 83.29 5006.32 175.00 2.767 46 46.58 4835.43 176.97 4856.91 85.44 5006.06 175.00 2.768 47 47.11 4835.43 178.55 4856.93 86.70 5005.89 175.00 2.768 48 46.05 4835.44 175.39 4856.88 84.18 5006.24 175.00 2.770 49 46.58 4835.43 177.49 4856.92 85.82 5005.98 175.00 2.770 50 45.53 4835.44 178.55 4856.93 85.40 5011.08 180.10 2.770 51 45.00 4835.45 176.97 4856.91 84.14 5011.25 180.10 2.771 52 45.53 4835.44 173.81 4856.86 82.92 5006.40 175.00 2.772 53 47.11 4835.43 178.02 4856.92 86.33 5005.98 175.00 2.773 54 46.58 4835.43 176.44 4856.90 85.07 5006.15 175.00 2.773 55 45.00 4835.45 172.76 4856.85 82.03 5006.49 175.00 2.773 56 46.05 4835.44 179.60 4856.95 86.29 5010.99 180.10 2.774 57 47.63 4835.42 179.60 4856.95 87.58 5005.80 175.00 2.774 58 46.05 4835.44 174.86 4856.88 83.80 5006.32 175.00 2.775 59 45.00 4835.45 176.44 4856.90 83.77 5011.33 180.10 2.776 60 45.53 4835.44 173.28 4856.85 82.54 5006.49 175.00 2.777 61 46.58 4835.43 175.92 4856.89 84.69 5006.23 175.00 2.777 62 45.00 4835.45 172.23 4856.84 81.65 5006.57 175.00 2.778 63 47.63 4835.42 179.07 4856.94 87.21 5005.89 175.00 2.778 64 46.05 4835.44 179.07 4856.94 85.91 5011.07 180.10 2.778 65 45.53 4835.44 177.49 4856.92 84.66 5011.24 180.10 2.779 66 45.53 4835.44 172.76 4856.85 82.16 5006.57 175.00 2.779 67 46.05 4835.44 174.34 4856.87 83.43 5006.40 175.00 2.780 68 45.53 4835.44 178.02 4856.92 85.03 5011.16 180.10 2.780 69 47.11 4835.43 177.49 4856.92 85.95 5006.06 175.00 2.781 70 45.00 4835.45 175.92 4856.89 83.39 5011.41 180.10 2.781 71 47.11 4835.43 176.97 4856.91 85.58 5006.15 175.00 2.781 72 47.63 4835.42 178.55 4856.93 86.84 5005.98 175.00 2.782 73 46.58 4835.43 175.39 4856.88 84.31 5006.32 175.00 2.782 74 46.05 4835.44 178.55 4856.93 85.54 5011.16 180.10 2.782 75 45.53 4835.44 176.97 4856.91 84.28 5011.33 180.10 2.784 76 46.05 4835.44 173.81 4856.86 83.05 5006.48 175.00 2.785 77 47.11 4835.43 176.44 4856.90 85.20 5006.23 175.00 2.786 78 47.63 4835.42 178.02 4856.92 86.46 5006.06 175.00 2.786 79 45.00 4835.45 175.39 4856.88 83.02 5011.49 180.10 2.786 80 46.58 4835.43 179.60 4856.95 86.43 5011.07 180.10 2.787 81 46.58 4835.43 174.86 4856.88 83.94 5006.40 175.00 2.787 82 48.16 4835.42 179.60 4856.95 87.72 5005.89 175.00 2.787 83 45.00 4835.45 171.71 4856.83 81.27 5006.65 175.00 2.787 84 45.00 4835.45 179.60 4856.95 85.14 5016.25 185.20 2.788 85 45.53 4835.44 176.44 4856.90 83.90 5011.41 180.10 2.788 86 47.11 4835.43 175.92 4856.89 84.82 5006.32 175.00 2.790 87 46.05 4835.44 173.28 4856.85 82.67 5006.57 175.00 2.791 88 46.05 4835.44 178.02 4856.92 85.17 5011.24 180.10 2.791 89 45.00 4835.45 171.18 4856.82 80.89 5006.73 175.00 2.791 90 46.58 4835.43 179.07 4856.94 86.05 5011.16 180.10 2.791 91 48.16 4835.42 179.07 4856.94 87.35 5005.97 175.00 2.791 92 47.63 4835.42 177.49 4856.92 86.09 5006.15 175.00 2.791 93 46.05 4835.44 177.49 4856.92 84.79 5011.33 180.10 2.791 94 45.00 4835.45 174.86 4856.88 82.64 5011.57 180.10 2.791 95 46.58 4835.43 174.34 4856.87 83.56 5006.48 175.00 2.792 96 45.00 4835.45 179.07 4856.94 84.77 5016.33 185.20 2.793 97 45.53 4835.44 172.23 4856.84 81.78 5006.65 175.00 2.793 98 45.53 4835.44 175.92 4856.89 83.53 5011.49 180.10 2.793 99 48.16 4835.42 178.55 4856.93 86.97 5006.06 175.00 2.795 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4835.45 XR: 179.60 YR: 4856.95 Centre: XC: 86.88 YC: 5005.36 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4835.45 52.19 4833.84 59.44 4832.53 66.74 4831.53 74.08 4830.83 81.44 4830.45 88.80 4830.38 96.17 4830.61 103.52 4831.16 110.83 4832.01 118.11 4833.17 125.33 4834.64 132.48 4836.41 139.56 4838.48 146.53 4840.85 153.41 4843.50 160.16 4846.45 166.79 4849.67 173.27 4853.17 179.60 4856.95 Slice Geometry and Properties - Critical Failure Surface (circle 1, 43 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.67 -12.6 2.50 2.56 1 50.00 25.0 77.07 42.86 35.70 1.07 2 47.50 2.01 -12.6 2.50 2.56 1 50.00 25.0 231.21 128.58 98.49 1.07 3 50.00 3.68 -12.6 2.19 2.24 1 50.00 25.0 426.89 196.94 203.55 1.07 4 52.19 11.69 -10.2 3.63 3.68 1 50.00 25.0 1364.31 509.07 387.37 1.05 5 55.82 18.44 -10.2 3.63 3.68 1 50.00 25.0 2158.75 726.82 611.61 1.05 6 59.44 25.10 -7.8 3.65 3.68 1 50.00 25.0 2942.81 927.44 822.26 1.03 7 63.09 31.37 -7.8 3.65 3.68 1 50.00 25.0 3682.04 1110.53 1028.50 1.03 8 66.74 37.55 -5.4 3.67 3.68 1 50.00 25.0 4411.66 1276.09 1218.73 1.02 9 70.41 43.31 -5.4 3.67 3.68 1 50.00 25.0 5091.98 1424.04 1406.62 1.02 10 74.08 48.94 -3.0 3.68 3.68 1 50.00 25.0 5758.33 1554.48 1576.48 1.01 11 77.76 54.16 -3.0 3.68 3.68 1 50.00 25.0 6376.81 1667.06 1745.80 1.01 12 81.44 50.84 -0.6 3.18 3.18 1 50.00 25.0 5990.06 1517.50 1884.97 1.00 13 84.62 54.32 -0.6 3.18 3.18 1 50.00 25.0 6403.84 1574.99 2015.15 1.00 14 87.80 17.85 -0.6 1.00 1.00 1 50.00 25.0 2102.83 508.64 2098.40 1.00 15 88.80 68.17 1.8 3.68 3.68 1 50.00 25.0 7992.25 1898.42 2160.77 1.00 16 92.49 72.26 1.8 3.68 3.68 1 50.00 25.0 8412.97 1939.94 2274.50 1.00 17 96.17 75.89 4.2 3.67 3.68 1 50.00 25.0 8780.66 1963.54 2365.07 0.99 18 99.84 79.38 4.2 3.67 3.68 1 50.00 25.0 9133.72 1969.16 2459.97 0.99 19 103.52 82.26 6.7 3.66 3.68 1 50.00 25.0 9415.08 1956.80 2530.53 0.99 20 107.18 85.16 6.7 3.66 3.68 1 50.00 25.0 9699.91 1926.75 2606.62 0.99 21 110.83 54.47 9.1 2.28 2.31 1 50.00 25.0 6181.98 1186.43 2646.74 0.99 22 113.12 55.38 9.1 2.28 2.31 1 50.00 25.0 6267.11 1160.61 2682.67 0.99 23 115.40 65.69 9.1 2.71 2.75 1 50.00 25.0 7428.17 1344.68 2676.98 0.99 24 118.11 85.10 11.5 3.60 3.68 1 50.00 25.0 9636.11 1725.68 2596.49 0.99 25 121.71 82.36 11.5 3.60 3.68 1 50.00 25.0 9339.56 1624.80 2515.98 0.99 26 125.32 78.92 13.9 3.58 3.69 2 10.00 35.0 8939.75 1512.43 2368.19 0.97 27 128.90 75.63 13.9 3.58 3.69 2 10.00 35.0 8530.95 1375.01 2258.69 0.97 28 132.48 64.67 16.3 3.21 3.34 2 10.00 35.0 7258.66 1111.75 2126.05 0.97 29 135.69 61.57 16.3 3.21 3.34 2 10.00 35.0 6870.84 970.09 2010.67 0.97 30 138.90 12.22 16.3 0.66 0.68 3 0.00 45.0 1258.54 238.71 1764.68 0.94 31 139.56 42.47 18.7 2.34 2.47 3 0.00 45.0 4514.51 1760.50 1791.11 0.94 32 141.90 40.15 18.7 2.32 2.45 2 10.00 35.0 4844.32 2371.55 1998.94 0.97 33 144.22 38.29 18.7 2.32 2.45 2 10.00 35.0 4603.76 2251.73 1899.51 0.97 34 146.53 53.07 21.1 3.44 3.68 2 10.00 35.0 6347.22 3147.29 1755.55 0.97 35 149.97 48.42 21.1 3.44 3.68 2 10.00 35.0 5745.36 2841.95 1588.79 0.97 36 153.41 42.78 23.5 3.38 3.68 2 10.00 35.0 5023.59 2519.86 1404.64 0.98 37 156.78 37.72 23.6 3.38 3.68 2 10.00 35.0 4369.00 2181.56 1221.12 0.98 38 160.16 30.73 26.0 3.19 3.55 2 10.00 35.0 3491.98 1766.14 1026.30 0.99 39 163.35 27.46 26.0 3.43 3.82 1 50.00 25.0 3074.34 1517.02 848.25 1.03 40 166.79 17.94 28.4 2.81 3.20 1 50.00 25.0 1995.27 951.24 665.14 1.04 41 169.60 17.04 28.4 3.67 4.17 1 50.00 25.0 1870.36 785.32 473.14 1.04 42 173.27 9.15 30.8 3.40 3.96 1 50.00 25.0 966.59 250.11 253.73 1.06 43 176.67 2.49 30.8 2.93 3.41 1 50.00 25.0 249.34 0.00 67.21 1.06 X-S Area: 1906.80 Path Length: 140.00 X-S Weight: 219260.47 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NW2-Rec-EQ.gmf Processed: 21 Jan 2026 09:07:48 DATA: Analysis 1 - Slope Stability - Case NW-2 - Reclaimed Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4858.00 219.60 4858.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 138.90 4857.00 141.90 4857.00 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4848.00 138.90 4848.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 141.90 4848.00 219.60 4848.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4835.90 50.00 4835.40 138.90 4834.50 Profile: 6 (3 points) Material beneath: 1 - Clay 141.90 4834.50 160.20 4834.30 219.60 4834.40 Profile: 7 (2 points) Material beneath: 1 - Clay 138.90 4831.50 141.90 4831.50 Slope Surface (10 points) 0.00 4835.90 50.00 4835.40 115.40 4857.20 138.90 4857.00 141.90 4857.00 169.60 4856.80 183.30 4857.00 198.50 4857.20 212.30 4855.20 219.60 4855.00 Phreatic Surface (6 points) 0.00 4835.90 50.00 4835.40 138.90 4842.60 141.90 4855.20 212.30 4855.20 219.60 4855.00 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4835.40 XR: 174.60 YR: 4856.87 Centre: XC: 62.49 YC: 5135.14 Radius: R: 300.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-2 - Reclaimed Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.577 Analysis Summary There were: 17124 successful analyses from a total of 20001 trial failure surfaces 2877 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.87 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4835.45 179.60 4856.95 86.88 5005.36 175.00 1.865 <-- Critical Surface 2 45.00 4835.45 179.07 4856.94 86.51 5005.46 175.00 1.870 3 45.53 4835.44 179.60 4856.95 87.02 5005.45 175.00 1.873 4 45.00 4835.45 178.55 4856.93 86.14 5005.54 175.00 1.877 5 45.53 4835.44 179.07 4856.94 86.65 5005.54 175.00 1.879 6 46.05 4835.44 179.60 4856.95 87.16 5005.54 175.00 1.882 7 45.53 4835.44 178.55 4856.93 86.28 5005.63 175.00 1.884 8 45.00 4835.45 178.02 4856.92 85.77 5005.63 175.00 1.886 9 46.05 4835.44 179.07 4856.94 86.79 5005.63 175.00 1.887 10 45.00 4835.45 177.49 4856.92 85.40 5005.72 175.00 1.887 11 46.58 4835.43 179.60 4856.95 87.31 5005.63 175.00 1.890 12 46.05 4835.44 178.55 4856.93 86.42 5005.72 175.00 1.892 13 45.53 4835.44 178.02 4856.92 85.91 5005.72 175.00 1.892 14 45.00 4835.45 176.97 4856.91 85.03 5005.81 175.00 1.892 15 45.00 4835.45 179.60 4856.95 86.01 5010.82 180.10 1.892 16 45.53 4835.44 177.49 4856.92 85.54 5005.81 175.00 1.895 17 46.58 4835.43 179.07 4856.94 86.93 5005.72 175.00 1.895 18 47.11 4835.43 179.60 4856.95 87.45 5005.72 175.00 1.898 19 45.00 4835.45 179.07 4856.94 85.64 5010.91 180.10 1.898 20 45.00 4835.45 176.44 4856.90 84.66 5005.90 175.00 1.898 21 46.05 4835.44 178.02 4856.92 86.05 5005.81 175.00 1.899 22 46.58 4835.43 178.55 4856.93 86.56 5005.81 175.00 1.900 23 45.53 4835.44 179.60 4856.95 86.15 5010.91 180.10 1.900 24 45.53 4835.44 176.97 4856.91 85.17 5005.90 175.00 1.900 25 46.05 4835.44 177.49 4856.92 85.68 5005.89 175.00 1.903 26 47.11 4835.43 179.07 4856.94 87.07 5005.80 175.00 1.903 27 45.00 4835.45 175.92 4856.89 84.28 5005.98 175.00 1.904 28 45.00 4835.45 178.55 4856.93 85.27 5010.99 180.10 1.905 29 46.58 4835.43 178.02 4856.92 86.19 5005.89 175.00 1.906 30 45.53 4835.44 179.07 4856.94 85.78 5010.99 180.10 1.906 31 47.63 4835.42 179.60 4856.95 87.58 5005.80 175.00 1.906 32 45.53 4835.44 176.44 4856.90 84.79 5005.98 175.00 1.906 33 47.11 4835.43 178.55 4856.93 86.70 5005.89 175.00 1.908 34 46.05 4835.44 179.60 4856.95 86.29 5010.99 180.10 1.908 35 46.05 4835.44 176.97 4856.91 85.30 5005.98 175.00 1.908 36 45.00 4835.45 178.02 4856.92 84.89 5011.08 180.10 1.909 37 45.00 4835.45 175.39 4856.88 83.91 5006.07 175.00 1.910 38 47.63 4835.42 179.07 4856.94 87.21 5005.89 175.00 1.911 39 45.53 4835.44 178.55 4856.93 85.40 5011.08 180.10 1.912 40 45.53 4835.44 175.92 4856.89 84.42 5006.07 175.00 1.912 41 47.11 4835.43 178.02 4856.92 86.33 5005.98 175.00 1.913 42 46.05 4835.44 179.07 4856.94 85.91 5011.07 180.10 1.914 43 48.16 4835.42 179.60 4856.95 87.72 5005.89 175.00 1.914 44 46.05 4835.44 176.44 4856.90 84.93 5006.07 175.00 1.914 45 45.00 4835.45 177.49 4856.92 84.52 5011.16 180.10 1.915 46 46.58 4835.43 177.49 4856.92 85.82 5005.98 175.00 1.915 47 45.00 4835.45 174.86 4856.88 83.53 5006.15 175.00 1.916 48 46.58 4835.43 179.60 4856.95 86.43 5011.07 180.10 1.916 49 47.63 4835.42 178.55 4856.93 86.84 5005.98 175.00 1.916 50 46.58 4835.43 176.97 4856.91 85.44 5006.06 175.00 1.916 51 45.53 4835.44 175.39 4856.88 84.04 5006.15 175.00 1.918 52 46.05 4835.44 178.55 4856.93 85.54 5011.16 180.10 1.919 53 45.00 4835.45 179.60 4856.95 85.14 5016.25 185.20 1.919 54 48.16 4835.42 179.07 4856.94 87.35 5005.97 175.00 1.919 55 46.05 4835.44 175.92 4856.89 84.56 5006.15 175.00 1.920 56 45.00 4835.45 176.97 4856.91 84.14 5011.25 180.10 1.920 57 45.53 4835.44 178.02 4856.92 85.03 5011.16 180.10 1.921 58 47.11 4835.43 177.49 4856.92 85.95 5006.06 175.00 1.921 59 46.58 4835.43 179.07 4856.94 86.05 5011.16 180.10 1.922 60 47.63 4835.42 178.02 4856.92 86.46 5006.06 175.00 1.922 61 45.00 4835.45 174.34 4856.87 83.16 5006.24 175.00 1.922 62 46.58 4835.43 176.44 4856.90 85.07 5006.15 175.00 1.922 63 48.68 4835.41 179.60 4856.95 87.86 5005.97 175.00 1.922 64 45.53 4835.44 177.49 4856.92 84.66 5011.24 180.10 1.922 65 45.53 4835.44 174.86 4856.88 83.67 5006.24 175.00 1.924 66 47.11 4835.43 179.60 4856.95 86.56 5011.16 180.10 1.924 67 48.16 4835.42 178.55 4856.93 86.97 5006.06 175.00 1.924 68 47.11 4835.43 176.97 4856.91 85.58 5006.15 175.00 1.925 69 45.00 4835.45 179.07 4856.94 84.77 5016.33 185.20 1.925 70 46.05 4835.44 175.39 4856.88 84.18 5006.24 175.00 1.926 71 45.00 4835.45 176.44 4856.90 83.77 5011.33 180.10 1.926 72 46.58 4835.43 178.55 4856.93 85.68 5011.24 180.10 1.927 73 45.53 4835.44 179.60 4856.95 85.28 5016.33 185.20 1.927 74 46.05 4835.44 178.02 4856.92 85.17 5011.24 180.10 1.927 75 48.68 4835.41 179.07 4856.94 87.48 5006.06 175.00 1.927 76 47.63 4835.42 177.49 4856.92 86.09 5006.15 175.00 1.928 77 46.58 4835.43 175.92 4856.89 84.69 5006.23 175.00 1.928 78 45.53 4835.44 176.97 4856.91 84.28 5011.33 180.10 1.928 79 45.00 4835.45 173.81 4856.86 82.78 5006.32 175.00 1.928 80 47.11 4835.43 179.07 4856.94 86.19 5011.24 180.10 1.929 81 48.16 4835.42 178.02 4856.92 86.60 5006.14 175.00 1.930 82 45.53 4835.44 174.34 4856.87 83.29 5006.32 175.00 1.930 83 47.11 4835.43 176.44 4856.90 85.20 5006.23 175.00 1.930 84 46.05 4835.44 177.49 4856.92 84.79 5011.33 180.10 1.930 85 49.21 4835.41 179.60 4856.95 88.00 5006.06 175.00 1.930 86 46.05 4835.44 174.86 4856.88 83.80 5006.32 175.00 1.932 87 47.63 4835.42 179.60 4856.95 86.70 5011.24 180.10 1.932 88 45.00 4835.45 175.92 4856.89 83.39 5011.41 180.10 1.932 89 45.53 4835.44 179.07 4856.94 84.90 5016.41 185.20 1.933 90 48.68 4835.41 178.55 4856.93 87.11 5006.14 175.00 1.933 91 45.00 4835.45 178.55 4856.93 84.39 5016.42 185.20 1.933 92 46.58 4835.43 178.02 4856.92 85.30 5011.32 180.10 1.933 93 45.00 4835.45 173.28 4856.85 82.40 5006.41 175.00 1.934 94 46.58 4835.43 175.39 4856.88 84.31 5006.32 175.00 1.934 95 45.53 4835.44 176.44 4856.90 83.90 5011.41 180.10 1.934 96 46.05 4835.44 179.60 4856.95 85.41 5016.41 185.20 1.935 97 47.11 4835.43 178.55 4856.93 85.81 5011.32 180.10 1.935 98 48.16 4835.42 177.49 4856.92 86.22 5006.23 175.00 1.935 99 49.21 4835.41 179.07 4856.94 87.62 5006.14 175.00 1.936 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4835.45 XR: 179.60 YR: 4856.95 Centre: XC: 86.88 YC: 5005.36 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4835.45 52.19 4833.84 59.44 4832.53 66.74 4831.53 74.08 4830.83 81.44 4830.45 88.80 4830.38 96.17 4830.61 103.52 4831.16 110.83 4832.01 118.11 4833.17 125.33 4834.64 132.48 4836.41 139.56 4838.48 146.53 4840.85 153.41 4843.50 160.16 4846.45 166.79 4849.67 173.27 4853.17 179.60 4856.95 Slice Geometry and Properties - Critical Failure Surface (circle 1, 43 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.67 -12.6 2.50 2.56 1 50.00 25.0 77.07 42.86 38.03 1.09 2 47.50 2.01 -12.6 2.50 2.56 1 50.00 25.0 231.21 128.58 101.37 1.09 3 50.00 3.68 -12.6 2.19 2.24 1 50.00 25.0 426.89 196.94 207.68 1.09 4 52.19 11.69 -10.2 3.63 3.68 1 50.00 25.0 1364.31 509.07 392.61 1.06 5 55.82 18.44 -10.2 3.63 3.68 1 50.00 25.0 2158.75 726.82 619.27 1.06 6 59.44 25.10 -7.8 3.65 3.68 1 50.00 25.0 2942.81 927.44 829.76 1.05 7 63.09 31.37 -7.8 3.65 3.68 1 50.00 25.0 3682.04 1110.53 1037.72 1.05 8 66.74 37.55 -5.4 3.67 3.68 1 50.00 25.0 4411.66 1276.09 1226.11 1.03 9 70.41 43.31 -5.4 3.67 3.68 1 50.00 25.0 5091.98 1424.04 1415.11 1.03 10 74.08 48.94 -3.0 3.68 3.68 1 50.00 25.0 5758.33 1554.48 1581.68 1.01 11 77.76 54.16 -3.0 3.68 3.68 1 50.00 25.0 6376.81 1667.06 1751.56 1.01 12 81.44 50.84 -0.6 3.18 3.18 1 50.00 25.0 5990.06 1517.50 1886.16 1.00 13 84.62 54.32 -0.6 3.18 3.18 1 50.00 25.0 6403.84 1574.99 2016.41 1.00 14 87.80 17.85 -0.6 1.00 1.00 1 50.00 25.0 2102.83 508.64 2099.75 1.00 15 88.80 68.17 1.8 3.68 3.68 1 50.00 25.0 7992.25 1898.42 2156.43 0.99 16 92.49 72.26 1.8 3.68 3.68 1 50.00 25.0 8412.97 1939.94 2269.93 0.99 17 96.17 75.89 4.2 3.67 3.68 1 50.00 25.0 8780.66 1963.54 2354.07 0.98 18 99.84 79.38 4.2 3.67 3.68 1 50.00 25.0 9133.72 1969.16 2448.44 0.98 19 103.52 82.26 6.7 3.66 3.68 1 50.00 25.0 9415.08 1956.80 2511.94 0.98 20 107.18 85.16 6.7 3.66 3.68 1 50.00 25.0 9699.91 1926.75 2587.26 0.98 21 110.83 54.47 9.1 2.28 2.31 1 50.00 25.0 6181.98 1186.43 2619.99 0.97 22 113.12 55.38 9.1 2.28 2.31 1 50.00 25.0 6267.11 1160.61 2655.32 0.97 23 115.40 65.69 9.1 2.71 2.75 1 50.00 25.0 7428.17 1344.68 2649.59 0.97 24 118.11 85.10 11.5 3.60 3.68 1 50.00 25.0 9636.11 1725.68 2562.89 0.97 25 121.71 82.36 11.5 3.60 3.68 1 50.00 25.0 9339.56 1624.80 2483.16 0.97 26 125.32 78.92 13.9 3.58 3.69 2 10.00 35.0 8939.75 1512.43 2316.05 0.94 27 128.90 75.63 13.9 3.58 3.69 2 10.00 35.0 8530.95 1375.01 2208.43 0.94 28 132.48 64.67 16.3 3.21 3.34 2 10.00 35.0 7258.66 1111.75 2070.36 0.94 29 135.69 61.57 16.3 3.21 3.34 2 10.00 35.0 6870.84 970.09 1957.23 0.94 30 138.90 12.22 16.3 0.66 0.68 3 0.00 45.0 1258.54 238.71 1705.00 0.90 31 139.56 42.47 18.7 2.34 2.47 3 0.00 45.0 4514.51 1760.50 1739.45 0.89 32 141.90 40.15 18.7 2.32 2.45 2 10.00 35.0 4844.32 2371.55 1962.29 0.94 33 144.22 38.29 18.7 2.32 2.45 2 10.00 35.0 4603.76 2251.73 1864.61 0.94 34 146.53 53.07 21.1 3.44 3.68 2 10.00 35.0 6347.22 3147.29 1719.44 0.94 35 149.97 48.42 21.1 3.44 3.68 2 10.00 35.0 5745.36 2841.95 1555.99 0.94 36 153.41 42.78 23.5 3.38 3.68 2 10.00 35.0 5023.59 2519.86 1372.49 0.94 37 156.78 37.72 23.6 3.38 3.68 2 10.00 35.0 4369.00 2181.56 1192.97 0.94 38 160.16 30.73 26.0 3.19 3.55 2 10.00 35.0 3491.98 1766.14 1000.20 0.94 39 163.35 27.46 26.0 3.43 3.82 1 50.00 25.0 3074.34 1517.02 829.40 0.99 40 166.79 17.94 28.4 2.81 3.20 1 50.00 25.0 1995.27 951.24 647.57 1.00 41 169.60 17.04 28.4 3.67 4.17 1 50.00 25.0 1870.36 785.32 458.63 1.00 42 173.27 9.15 30.8 3.40 3.96 1 50.00 25.0 966.59 250.11 241.72 1.01 43 176.67 2.49 30.8 2.93 3.41 1 50.00 25.0 249.34 0.00 60.17 1.01 X-S Area: 1906.80 Path Length: 140.00 X-S Weight: 219260.47 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NW3-Rec.gmf Processed: 21 Jan 2026 09:09:12 DATA: Analysis 1 - Slope Stability - Case NW-3 - Reclaimed Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4857.00 243.20 4857.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 140.80 4855.30 143.80 4855.30 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4852.00 140.80 4852.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 143.80 4852.00 243.20 4852.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4833.60 50.00 4832.90 140.80 4832.70 Profile: 6 (2 points) Material beneath: 1 - Clay 143.80 4832.70 243.20 4833.20 Profile: 7 (2 points) Material beneath: 1 - Clay 140.80 4829.70 143.80 4829.70 Slope Surface (11 points) 0.00 4833.60 50.00 4832.90 117.30 4855.30 140.80 4855.30 143.80 4855.30 193.20 4855.10 199.40 4855.20 213.70 4856.60 227.80 4856.40 237.60 4854.00 243.20 4854.00 Phreatic Surface (5 points) 0.00 4833.60 50.00 4832.90 140.80 4840.30 143.80 4854.90 243.20 4854.90 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4832.90 XR: 198.15 YR: 4855.18 Centre: XC: 80.87 YC: 5131.31 Radius: R: 300.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-3 - Reclaimed Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 3.325 Analysis Summary There were: 19966 successful analyses from a total of 20001 trial failure surfaces 35 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.53 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4832.97 199.47 4855.21 99.91 4999.13 175.00 2.527 <-- Critical Surface 2 45.00 4832.97 199.99 4855.26 100.22 4999.03 175.00 2.532 3 45.00 4832.97 200.52 4855.31 100.52 4998.93 175.00 2.532 4 45.53 4832.96 199.47 4855.21 100.08 4999.24 175.00 2.534 5 45.00 4832.97 201.04 4855.36 100.83 4998.83 175.00 2.536 6 45.00 4832.97 198.94 4855.19 99.57 4999.24 175.00 2.536 7 45.00 4832.97 201.57 4855.41 101.14 4998.72 175.00 2.539 8 45.53 4832.96 199.99 4855.26 100.38 4999.14 175.00 2.540 9 45.00 4832.97 193.68 4855.11 96.06 5000.35 175.00 2.542 10 45.00 4832.97 202.10 4855.46 101.44 4998.62 175.00 2.543 11 45.00 4832.97 195.78 4855.14 97.47 4999.92 175.00 2.543 12 45.00 4832.97 194.20 4855.12 96.42 5000.25 175.00 2.544 13 45.53 4832.96 200.52 4855.31 100.69 4999.04 175.00 2.545 14 45.53 4832.96 201.04 4855.36 100.99 4998.94 175.00 2.546 15 45.00 4832.97 198.41 4855.18 99.22 4999.36 175.00 2.546 16 45.00 4832.97 202.62 4855.52 101.75 4998.51 175.00 2.546 17 45.00 4832.97 194.73 4855.12 96.77 5000.14 175.00 2.547 18 45.00 4832.97 193.15 4855.10 95.71 5000.46 175.00 2.548 19 46.05 4832.96 199.99 4855.26 100.54 4999.25 175.00 2.549 20 45.53 4832.96 201.57 4855.41 101.30 4998.84 175.00 2.549 21 45.00 4832.97 203.15 4855.57 102.05 4998.41 175.00 2.549 22 45.00 4832.97 195.26 4855.13 97.12 5000.03 175.00 2.549 23 45.53 4832.96 198.94 4855.19 99.73 4999.36 175.00 2.551 24 45.00 4832.97 201.04 4855.36 100.02 5004.46 180.10 2.551 25 45.00 4832.97 196.31 4855.15 97.82 4999.81 175.00 2.552 26 45.53 4832.96 193.68 4855.11 96.22 5000.46 175.00 2.552 27 45.53 4832.96 202.10 4855.46 101.60 4998.73 175.00 2.553 28 46.05 4832.96 200.52 4855.31 100.85 4999.15 175.00 2.553 29 45.53 4832.96 194.20 4855.12 96.57 5000.35 175.00 2.554 30 45.00 4832.97 201.57 4855.41 100.33 5004.36 180.10 2.555 31 45.53 4832.96 202.62 4855.52 101.91 4998.63 175.00 2.556 32 45.53 4832.96 195.78 4855.14 97.63 5000.03 175.00 2.556 33 45.53 4832.96 194.73 4855.12 96.93 5000.24 175.00 2.557 34 46.05 4832.96 199.47 4855.21 100.24 4999.35 175.00 2.557 35 45.00 4832.97 196.83 4855.16 98.17 4999.70 175.00 2.558 36 46.05 4832.96 201.04 4855.36 101.16 4999.05 175.00 2.558 37 45.53 4832.96 193.15 4855.10 95.86 5000.57 175.00 2.558 38 45.00 4832.97 202.10 4855.46 100.63 5004.26 180.10 2.558 39 46.58 4832.95 199.99 4855.26 100.71 4999.37 175.00 2.559 40 45.53 4832.96 195.26 4855.13 97.28 5000.14 175.00 2.560 41 45.53 4832.96 203.15 4855.57 102.22 4998.53 175.00 2.560 42 46.05 4832.96 195.26 4855.13 97.44 5000.24 175.00 2.561 43 45.00 4832.97 197.36 4855.17 98.52 4999.58 175.00 2.561 44 45.53 4832.96 198.41 4855.18 99.38 4999.47 175.00 2.562 45 46.05 4832.96 193.68 4855.11 96.37 5000.56 175.00 2.562 46 45.00 4832.97 202.62 4855.52 100.94 5004.17 180.10 2.563 47 46.05 4832.96 202.10 4855.46 101.77 4998.85 175.00 2.563 48 46.05 4832.96 201.57 4855.41 101.46 4998.95 175.00 2.563 49 46.58 4832.95 200.52 4855.31 101.01 4999.27 175.00 2.563 50 45.00 4832.97 197.89 4855.18 98.87 4999.47 175.00 2.564 51 46.05 4832.96 194.20 4855.12 96.73 5000.46 175.00 2.564 52 45.53 4832.96 196.31 4855.15 97.98 4999.92 175.00 2.565 53 45.00 4832.97 194.20 4855.12 95.59 5005.82 180.10 2.565 54 45.00 4832.97 200.52 4855.31 99.72 5004.56 180.10 2.565 55 45.53 4832.96 201.57 4855.41 100.49 5004.47 180.10 2.566 56 45.00 4832.97 193.68 4855.11 95.23 5005.92 180.10 2.566 57 46.05 4832.96 202.62 4855.52 102.07 4998.75 175.00 2.566 58 46.05 4832.96 198.94 4855.19 99.89 4999.47 175.00 2.566 59 46.58 4832.95 201.04 4855.36 101.32 4999.17 175.00 2.567 60 45.00 4832.97 194.73 4855.12 95.94 5005.72 180.10 2.567 61 46.05 4832.96 194.73 4855.12 97.08 5000.35 175.00 2.567 62 45.00 4832.97 203.15 4855.57 101.24 5004.06 180.10 2.567 63 45.00 4832.97 193.15 4855.10 94.88 5006.03 180.10 2.568 64 45.53 4832.96 196.83 4855.16 98.33 4999.81 175.00 2.568 65 45.53 4832.96 202.10 4855.46 100.79 5004.38 180.10 2.569 66 46.05 4832.96 193.15 4855.10 96.02 5000.67 175.00 2.569 67 46.05 4832.96 195.78 4855.14 97.79 5000.13 175.00 2.569 68 45.00 4832.97 195.26 4855.13 96.30 5005.61 180.10 2.570 69 45.00 4832.97 196.31 4855.15 97.00 5005.40 180.10 2.570 70 46.05 4832.96 203.15 4855.57 102.38 4998.64 175.00 2.570 71 46.58 4832.95 201.57 4855.41 101.63 4999.06 175.00 2.572 72 45.53 4832.96 197.36 4855.17 98.68 4999.69 175.00 2.572 73 45.53 4832.96 202.62 4855.52 101.10 5004.28 180.10 2.572 74 46.58 4832.95 193.68 4855.11 96.53 5000.67 175.00 2.572 75 45.00 4832.97 195.78 4855.14 96.65 5005.51 180.10 2.572 76 46.58 4832.95 199.47 4855.21 100.40 4999.47 175.00 2.572 77 45.53 4832.96 201.04 4855.36 100.18 5004.57 180.10 2.572 78 47.11 4832.94 200.52 4855.31 101.17 4999.38 175.00 2.574 79 45.53 4832.96 195.78 4855.14 96.81 5005.61 180.10 2.574 80 46.58 4832.95 195.26 4855.13 97.59 5000.35 175.00 2.574 81 45.00 4832.97 199.99 4855.26 99.41 5004.66 180.10 2.574 82 45.53 4832.96 194.20 4855.12 95.74 5005.92 180.10 2.575 83 46.58 4832.95 194.20 4855.12 96.88 5000.56 175.00 2.575 84 45.53 4832.96 197.89 4855.18 99.03 4999.58 175.00 2.575 85 45.53 4832.96 193.68 4855.11 95.39 5006.02 180.10 2.575 86 46.05 4832.96 201.57 4855.41 100.65 5004.58 180.10 2.576 87 46.05 4832.96 196.31 4855.15 98.14 5000.02 175.00 2.576 88 45.53 4832.96 203.15 4855.57 101.41 5004.18 180.10 2.576 89 45.00 4832.97 193.68 4855.11 94.41 5011.46 185.20 2.576 90 46.58 4832.95 202.10 4855.46 101.93 4998.96 175.00 2.576 91 46.58 4832.95 202.62 4855.52 102.24 4998.86 175.00 2.577 92 45.53 4832.96 193.15 4855.10 95.03 5006.13 180.10 2.577 93 47.11 4832.94 201.04 4855.36 101.48 4999.28 175.00 2.577 94 45.53 4832.96 194.73 4855.12 96.10 5005.82 180.10 2.577 95 45.00 4832.97 196.83 4855.16 97.36 5005.29 180.10 2.577 96 46.58 4832.95 194.73 4855.12 97.24 5000.45 175.00 2.577 97 45.00 4832.97 202.62 4855.52 100.13 5009.78 185.20 2.578 98 45.00 4832.97 193.15 4855.10 94.05 5011.56 185.20 2.578 99 46.05 4832.96 196.83 4855.16 98.49 4999.91 175.00 2.579 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4832.97 XR: 199.47 YR: 4855.21 Centre: XC: 99.91 YC: 4999.13 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4832.97 53.15 4830.50 61.40 4828.42 69.75 4826.75 78.17 4825.49 86.64 4824.64 95.14 4824.20 103.65 4824.17 112.15 4824.56 120.63 4825.36 129.05 4826.57 137.41 4828.20 145.68 4830.22 153.84 4832.65 161.87 4835.47 169.76 4838.67 177.48 4842.26 185.01 4846.22 192.35 4850.54 199.47 4855.21 Slice Geometry and Properties - Critical Failure Surface (circle 1, 40 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 3.62 -16.9 5.00 5.23 1 50.00 25.0 416.65 236.27 91.96 1.11 2 50.00 7.71 -16.9 3.15 3.29 1 50.00 25.0 892.42 421.46 299.34 1.11 3 53.15 19.22 -14.1 4.13 4.26 1 50.00 25.0 2237.54 888.99 563.47 1.08 4 57.27 29.18 -14.1 4.13 4.26 1 50.00 25.0 3403.77 1253.89 855.55 1.08 5 61.40 39.17 -11.3 4.17 4.26 1 50.00 25.0 4575.64 1592.53 1128.16 1.06 6 65.57 48.46 -11.3 4.17 4.26 1 50.00 25.0 5665.23 1904.81 1396.44 1.06 7 69.75 57.83 -8.5 4.21 4.26 1 50.00 25.0 6766.06 2190.23 1641.60 1.04 8 73.96 66.38 -8.5 4.21 4.26 1 50.00 25.0 7771.81 2448.95 1885.61 1.04 9 78.17 74.98 -5.7 4.23 4.26 1 50.00 25.0 8783.66 2680.82 2103.42 1.02 10 82.40 82.75 -5.7 4.23 4.26 1 50.00 25.0 9700.31 2885.62 2323.09 1.02 11 86.64 90.44 -3.0 4.25 4.26 1 50.00 25.0 10606.90 3063.24 2513.48 1.01 12 90.89 97.38 -3.0 4.25 4.26 1 50.00 25.0 11428.23 3213.43 2708.27 1.01 13 95.14 104.03 -0.2 4.26 4.26 1 50.00 25.0 12216.24 3336.39 2871.37 1.00 14 99.39 110.11 -0.2 4.26 4.26 1 50.00 25.0 12938.49 3431.84 3041.14 1.00 15 103.65 101.32 2.6 3.74 3.74 1 50.00 25.0 11911.90 3072.70 3168.02 0.99 16 107.39 135.14 2.6 4.77 4.77 1 50.00 25.0 15842.30 3967.33 3300.83 0.99 17 112.15 152.53 5.4 5.15 5.17 1 50.00 25.0 17770.52 4312.98 3406.45 0.99 18 117.30 100.18 5.4 3.33 3.34 1 50.00 25.0 11644.13 2778.32 3450.49 0.99 19 120.63 124.85 8.2 4.21 4.26 1 50.00 25.0 14533.73 3495.99 3379.08 0.98 20 124.84 122.29 8.2 4.21 4.26 1 50.00 25.0 14262.20 3426.10 3315.87 0.98 21 129.05 118.33 11.0 4.18 4.26 1 50.00 25.0 13827.23 3328.73 3218.17 0.98 22 133.23 114.95 11.0 4.18 4.26 1 50.00 25.0 13459.63 3203.97 3132.22 0.98 23 137.41 90.45 13.8 3.39 3.49 1 50.00 25.0 10612.57 2514.95 3022.70 0.99 24 140.80 71.40 13.8 2.75 2.83 1 50.00 25.0 7630.50 3119.11 2694.84 0.99 25 143.55 53.87 13.8 2.13 2.19 1 50.00 25.0 6798.08 3406.90 3121.50 0.99 26 145.68 99.78 16.6 4.08 4.26 1 50.00 25.0 12631.04 6393.30 3007.51 0.99 27 149.76 94.77 16.6 4.08 4.26 1 50.00 25.0 12054.25 6071.52 2869.51 0.99 28 153.84 87.95 19.3 4.02 4.26 2 10.00 35.0 11216.66 5723.18 2663.32 0.97 29 157.86 82.23 19.3 4.02 4.26 2 10.00 35.0 10474.26 5348.80 2487.04 0.97 30 161.87 74.72 22.1 3.94 4.26 2 10.00 35.0 9504.46 4948.73 2282.76 0.97 31 165.81 68.33 22.1 3.94 4.26 2 10.00 35.0 8676.17 4522.82 2083.83 0.97 32 169.76 60.29 24.9 3.86 4.26 2 10.00 35.0 7636.13 4071.64 1860.08 0.98 33 173.62 53.31 24.9 3.86 4.26 2 10.00 35.0 6730.35 3595.45 1639.43 0.98 34 177.48 44.87 27.7 3.77 4.26 2 10.00 35.0 5640.77 3094.56 1397.30 0.99 35 181.25 37.36 27.7 3.77 4.26 2 10.00 35.0 4665.39 2569.10 1155.64 0.99 36 185.01 28.72 30.5 3.67 4.26 2 10.00 35.0 3548.75 2019.45 896.40 1.00 37 188.68 20.74 30.5 3.67 4.26 2 10.00 35.0 2513.70 1445.98 634.87 1.00 38 192.35 3.65 33.3 0.85 1.02 2 10.00 35.0 432.00 259.43 466.64 1.01 39 193.20 4.92 33.3 1.38 1.65 2 10.00 35.0 570.80 345.43 379.91 1.01 40 194.58 7.61 33.3 4.89 5.84 1 50.00 25.0 856.21 472.73 153.48 1.07 X-S Area: 2785.83 Path Length: 161.74 X-S Weight: 332846.72 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NW3-Rec-EQ.gmf Processed: 21 Jan 2026 09:09:58 DATA: Analysis 1 - Slope Stability - Case NW-3 - Reclaimed Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4857.00 243.20 4857.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 140.80 4855.30 143.80 4855.30 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4852.00 140.80 4852.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 143.80 4852.00 243.20 4852.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4833.60 50.00 4832.90 140.80 4832.70 Profile: 6 (2 points) Material beneath: 1 - Clay 143.80 4832.70 243.20 4833.20 Profile: 7 (2 points) Material beneath: 1 - Clay 140.80 4829.70 143.80 4829.70 Slope Surface (11 points) 0.00 4833.60 50.00 4832.90 117.30 4855.30 140.80 4855.30 143.80 4855.30 193.20 4855.10 199.40 4855.20 213.70 4856.60 227.80 4856.40 237.60 4854.00 243.20 4854.00 Phreatic Surface (5 points) 0.00 4833.60 50.00 4832.90 140.80 4840.30 143.80 4854.90 243.20 4854.90 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4832.90 XR: 198.15 YR: 4855.18 Centre: XC: 80.87 YC: 5131.31 Radius: R: 300.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-3 - Reclaimed Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.210 Analysis Summary There were: 19966 successful analyses from a total of 20001 trial failure surfaces 35 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.69 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4832.97 200.52 4855.31 100.52 4998.93 175.00 1.694 <-- Critical Surface 2 45.00 4832.97 199.47 4855.21 99.91 4999.13 175.00 1.695 3 45.00 4832.97 201.04 4855.36 100.83 4998.83 175.00 1.695 4 45.00 4832.97 201.57 4855.41 101.14 4998.72 175.00 1.695 5 45.00 4832.97 202.10 4855.46 101.44 4998.62 175.00 1.696 6 45.00 4832.97 199.99 4855.26 100.22 4999.03 175.00 1.696 7 45.00 4832.97 202.62 4855.52 101.75 4998.51 175.00 1.696 8 45.00 4832.97 203.15 4855.57 102.05 4998.41 175.00 1.697 9 45.53 4832.96 199.47 4855.21 100.08 4999.24 175.00 1.698 10 45.53 4832.96 199.99 4855.26 100.38 4999.14 175.00 1.700 11 45.53 4832.96 201.04 4855.36 100.99 4998.94 175.00 1.700 12 45.53 4832.96 201.57 4855.41 101.30 4998.84 175.00 1.701 13 45.53 4832.96 202.10 4855.46 101.60 4998.73 175.00 1.701 14 45.53 4832.96 200.52 4855.31 100.69 4999.04 175.00 1.702 15 45.53 4832.96 202.62 4855.52 101.91 4998.63 175.00 1.702 16 45.53 4832.96 203.15 4855.57 102.22 4998.53 175.00 1.702 17 45.00 4832.97 198.94 4855.19 99.57 4999.24 175.00 1.702 18 45.00 4832.97 201.04 4855.36 100.02 5004.46 180.10 1.704 19 45.00 4832.97 201.57 4855.41 100.33 5004.36 180.10 1.705 20 46.05 4832.96 199.99 4855.26 100.54 4999.25 175.00 1.705 21 45.00 4832.97 202.10 4855.46 100.63 5004.26 180.10 1.705 22 46.05 4832.96 200.52 4855.31 100.85 4999.15 175.00 1.706 23 45.00 4832.97 202.62 4855.52 100.94 5004.17 180.10 1.706 24 46.05 4832.96 202.10 4855.46 101.77 4998.85 175.00 1.707 25 46.05 4832.96 201.04 4855.36 101.16 4999.05 175.00 1.707 26 46.05 4832.96 202.62 4855.52 102.07 4998.75 175.00 1.707 27 45.00 4832.97 203.15 4855.57 101.24 5004.06 180.10 1.708 28 46.05 4832.96 203.15 4855.57 102.38 4998.64 175.00 1.708 29 46.05 4832.96 201.57 4855.41 101.46 4998.95 175.00 1.709 30 46.58 4832.95 199.99 4855.26 100.71 4999.37 175.00 1.710 31 45.53 4832.96 201.57 4855.41 100.49 5004.47 180.10 1.711 32 45.00 4832.97 198.41 4855.18 99.22 4999.36 175.00 1.711 33 45.53 4832.96 202.10 4855.46 100.79 5004.38 180.10 1.711 34 45.53 4832.96 198.94 4855.19 99.73 4999.36 175.00 1.711 35 45.53 4832.96 202.62 4855.52 101.10 5004.28 180.10 1.711 36 46.58 4832.95 200.52 4855.31 101.01 4999.27 175.00 1.711 37 46.58 4832.95 201.04 4855.36 101.32 4999.17 175.00 1.712 38 45.53 4832.96 203.15 4855.57 101.41 5004.18 180.10 1.712 39 46.05 4832.96 199.47 4855.21 100.24 4999.35 175.00 1.712 40 46.58 4832.95 202.62 4855.52 102.24 4998.86 175.00 1.713 41 46.58 4832.95 201.57 4855.41 101.63 4999.06 175.00 1.713 42 46.58 4832.95 203.15 4855.57 102.54 4998.76 175.00 1.714 43 46.58 4832.95 202.10 4855.46 101.93 4998.96 175.00 1.714 44 45.00 4832.97 200.52 4855.31 99.72 5004.56 180.10 1.715 45 45.00 4832.97 202.62 4855.52 100.13 5009.78 185.20 1.715 46 46.05 4832.96 201.57 4855.41 100.65 5004.58 180.10 1.716 47 45.00 4832.97 203.15 4855.57 100.44 5009.68 185.20 1.716 48 46.05 4832.96 202.10 4855.46 100.96 5004.48 180.10 1.717 49 46.05 4832.96 202.62 4855.52 101.26 5004.39 180.10 1.717 50 45.53 4832.96 201.04 4855.36 100.18 5004.57 180.10 1.717 51 46.05 4832.96 203.15 4855.57 101.57 5004.29 180.10 1.717 52 47.11 4832.94 200.52 4855.31 101.17 4999.38 175.00 1.717 53 47.11 4832.94 201.04 4855.36 101.48 4999.28 175.00 1.717 54 47.11 4832.94 201.57 4855.41 101.79 4999.18 175.00 1.718 55 47.11 4832.94 202.10 4855.46 102.09 4999.08 175.00 1.719 56 45.00 4832.97 195.78 4855.14 97.47 4999.92 175.00 1.719 57 47.11 4832.94 203.15 4855.57 102.71 4998.87 175.00 1.719 58 45.53 4832.96 198.41 4855.18 99.38 4999.47 175.00 1.720 59 46.05 4832.96 198.94 4855.19 99.89 4999.47 175.00 1.720 60 46.58 4832.95 199.47 4855.21 100.40 4999.47 175.00 1.721 61 47.11 4832.94 202.62 4855.52 102.40 4998.97 175.00 1.721 62 46.58 4832.95 201.57 4855.41 100.81 5004.69 180.10 1.721 63 45.53 4832.96 203.15 4855.57 100.60 5009.79 185.20 1.722 64 46.58 4832.95 202.10 4855.46 101.12 5004.59 180.10 1.722 65 45.00 4832.97 199.99 4855.26 99.41 5004.66 180.10 1.722 66 46.58 4832.95 202.62 4855.52 101.42 5004.50 180.10 1.723 67 45.00 4832.97 196.31 4855.15 97.82 4999.81 175.00 1.723 68 47.63 4832.93 200.52 4855.31 101.34 4999.49 175.00 1.723 69 47.11 4832.94 199.99 4855.26 100.87 4999.48 175.00 1.723 70 46.58 4832.95 203.15 4855.57 101.73 5004.40 180.10 1.723 71 47.63 4832.93 201.04 4855.36 101.64 4999.39 175.00 1.723 72 47.63 4832.93 201.57 4855.41 101.95 4999.29 175.00 1.724 73 45.53 4832.96 200.52 4855.31 99.88 5004.67 180.10 1.724 74 47.63 4832.93 202.10 4855.46 102.26 4999.19 175.00 1.724 75 45.00 4832.97 197.36 4855.17 98.52 4999.58 175.00 1.725 76 45.00 4832.97 196.83 4855.16 98.17 4999.70 175.00 1.725 77 45.00 4832.97 197.89 4855.18 98.87 4999.47 175.00 1.725 78 47.63 4832.93 202.62 4855.52 102.56 4999.09 175.00 1.725 79 45.00 4832.97 195.26 4855.13 97.12 5000.03 175.00 1.725 80 46.05 4832.96 201.04 4855.36 100.34 5004.68 180.10 1.725 81 45.00 4832.97 194.73 4855.12 96.77 5000.14 175.00 1.725 82 45.00 4832.97 194.20 4855.12 96.42 5000.25 175.00 1.726 83 45.00 4832.97 193.68 4855.11 96.06 5000.35 175.00 1.726 84 47.63 4832.93 203.15 4855.57 102.87 4998.99 175.00 1.726 85 45.53 4832.96 195.78 4855.14 97.63 5000.03 175.00 1.727 86 46.05 4832.96 203.15 4855.57 100.76 5009.89 185.20 1.727 87 45.00 4832.97 202.10 4855.46 99.83 5009.87 185.20 1.728 88 47.11 4832.94 202.10 4855.46 101.28 5004.70 180.10 1.728 89 45.00 4832.97 193.15 4855.10 95.71 5000.46 175.00 1.728 90 47.11 4832.94 202.62 4855.52 101.58 5004.61 180.10 1.728 91 48.16 4832.93 200.52 4855.31 101.50 4999.60 175.00 1.728 92 47.11 4832.94 203.15 4855.57 101.89 5004.51 180.10 1.729 93 46.58 4832.95 198.94 4855.19 100.05 4999.58 175.00 1.729 94 48.16 4832.93 201.04 4855.36 101.80 4999.50 175.00 1.729 95 45.53 4832.96 202.62 4855.52 100.29 5009.88 185.20 1.729 96 47.11 4832.94 199.47 4855.21 100.56 4999.58 175.00 1.730 97 48.16 4832.93 201.57 4855.41 102.11 4999.40 175.00 1.730 98 45.53 4832.96 196.31 4855.15 97.98 4999.92 175.00 1.730 99 45.53 4832.96 196.83 4855.16 98.33 4999.81 175.00 1.730 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4832.97 XR: 200.52 YR: 4855.31 Centre: XC: 100.52 YC: 4998.93 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4832.97 53.20 4830.45 61.51 4828.33 69.91 4826.63 78.39 4825.33 86.92 4824.46 95.48 4824.00 104.05 4823.96 112.62 4824.35 121.16 4825.15 129.64 4826.37 138.06 4828.00 146.39 4830.04 154.61 4832.49 162.69 4835.34 170.63 4838.58 178.40 4842.21 185.99 4846.21 193.36 4850.58 200.52 4855.31 Slice Geometry and Properties - Critical Failure Surface (circle 1, 42 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 3.67 -17.1 5.00 5.23 1 50.00 25.0 422.27 239.71 97.94 1.14 2 50.00 7.96 -17.1 3.20 3.34 1 50.00 25.0 922.01 436.04 313.02 1.14 3 53.20 19.67 -14.3 4.15 4.29 1 50.00 25.0 2290.06 912.20 584.77 1.11 4 57.35 29.81 -14.3 4.15 4.29 1 50.00 25.0 3477.74 1285.81 885.61 1.11 5 61.51 40.01 -11.5 4.20 4.29 1 50.00 25.0 4672.84 1632.60 1161.79 1.08 6 65.71 49.47 -11.5 4.20 4.29 1 50.00 25.0 5782.87 1952.42 1437.24 1.08 7 69.91 59.03 -8.7 4.24 4.29 1 50.00 25.0 6905.98 2245.13 1682.50 1.06 8 74.15 67.75 -8.7 4.24 4.29 1 50.00 25.0 7930.97 2510.35 1932.26 1.06 9 78.39 76.53 -5.9 4.26 4.29 1 50.00 25.0 8963.82 2748.22 2147.34 1.03 10 82.65 84.45 -5.9 4.26 4.29 1 50.00 25.0 9897.68 2958.31 2371.30 1.03 11 86.92 92.29 -3.1 4.28 4.29 1 50.00 25.0 10823.07 3140.77 2556.36 1.02 12 91.20 99.37 -3.1 4.28 4.29 1 50.00 25.0 11660.03 3295.17 2754.23 1.02 13 95.48 106.15 -0.2 4.29 4.29 1 50.00 25.0 12463.52 3421.63 2909.69 1.00 14 99.77 112.35 -0.2 4.29 4.29 1 50.00 25.0 13199.42 3520.12 3081.51 1.00 15 104.05 91.35 2.6 3.33 3.34 1 50.00 25.0 10738.72 2790.43 3191.50 0.99 16 107.39 73.95 2.6 2.62 2.62 1 50.00 25.0 8680.41 2208.33 3286.15 0.99 17 110.00 75.93 2.6 2.62 2.62 1 50.00 25.0 8881.69 2224.11 3362.35 0.99 18 112.62 140.23 5.4 4.68 4.70 1 50.00 25.0 16330.79 3998.37 3419.36 0.98 19 117.30 116.96 5.4 3.86 3.87 1 50.00 25.0 13594.76 3280.62 3455.44 0.98 20 121.16 126.66 8.2 4.24 4.29 1 50.00 25.0 14746.72 3589.85 3370.53 0.97 21 125.40 124.08 8.2 4.24 4.29 1 50.00 25.0 14471.92 3519.44 3307.61 0.97 22 129.64 120.06 11.0 4.21 4.29 1 50.00 25.0 14029.98 3420.86 3199.44 0.97 23 133.85 116.62 11.0 4.21 4.29 1 50.00 25.0 13656.89 3294.16 3113.78 0.97 24 138.06 73.84 13.8 2.74 2.82 1 50.00 25.0 8663.73 2085.39 3003.32 0.96 25 140.80 78.77 13.8 3.00 3.09 1 50.00 25.0 8444.11 3577.19 2703.10 0.96 26 143.80 66.19 13.8 2.59 2.67 1 50.00 25.0 8345.85 4187.22 3112.39 0.96 27 146.39 101.17 16.6 4.11 4.29 1 50.00 25.0 12799.50 6485.68 2985.58 0.96 28 150.50 96.07 16.6 4.11 4.29 1 50.00 25.0 12212.81 6158.06 2847.82 0.96 29 154.61 16.97 19.4 0.75 0.80 1 50.00 25.0 2163.94 1105.06 2743.89 0.97 30 155.36 80.13 19.4 3.67 3.89 2 10.00 35.0 10219.40 5217.47 2600.11 0.93 31 159.03 75.34 19.4 3.67 3.89 2 10.00 35.0 9597.54 4903.73 2441.91 0.93 32 162.69 75.66 22.2 3.97 4.29 2 10.00 35.0 9625.47 5015.10 2241.76 0.92 33 166.66 69.16 22.2 3.97 4.29 2 10.00 35.0 8782.85 4581.74 2045.48 0.92 34 170.63 60.96 25.0 3.89 4.29 2 10.00 35.0 7723.22 4122.26 1819.65 0.93 35 174.52 53.86 25.0 3.89 4.29 2 10.00 35.0 6801.46 3637.04 1602.50 0.93 36 178.40 45.27 27.8 3.79 4.29 2 10.00 35.0 5691.53 3126.77 1360.35 0.93 37 182.19 37.62 27.8 3.79 4.29 2 10.00 35.0 4699.07 2591.31 1123.11 0.93 38 185.99 28.28 30.6 3.61 4.19 2 10.00 35.0 3495.24 1992.67 869.09 0.93 39 189.59 20.52 30.6 3.61 4.19 2 10.00 35.0 2488.18 1433.91 618.58 0.93 40 193.20 8.95 33.2 2.31 2.76 2 10.00 35.0 1048.61 630.49 403.25 0.94 41 195.51 7.33 33.4 3.89 4.66 1 50.00 25.0 827.34 469.89 178.86 1.01 42 199.40 0.35 33.4 1.12 1.34 1 50.00 25.0 35.17 0.00 10.12 1.01 X-S Area: 2830.81 Path Length: 162.92 X-S Weight: 338209.16 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NW4-Rec.gmf Processed: 21 Jan 2026 09:11:31 DATA: Analysis 1 - Slope Stability - Case NW-4 - Reclaimed Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4860.00 332.70 4860.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 131.20 4857.20 134.20 4857.20 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4853.00 131.20 4853.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 134.20 4853.00 332.70 4853.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4837.40 50.00 4837.80 131.20 4838.20 Profile: 6 (2 points) Material beneath: 1 - Clay 134.20 4838.20 332.70 4838.70 Profile: 7 (2 points) Material beneath: 1 - Clay 131.20 4835.20 134.20 4835.20 Slope Surface (9 points) 0.00 4837.40 50.00 4837.80 107.70 4857.10 131.20 4857.20 134.20 4857.20 226.20 4857.70 234.20 4859.00 282.70 4859.50 332.70 4859.50 Phreatic Surface (5 points) 0.00 4837.40 50.00 4837.80 131.20 4844.50 134.20 4856.00 332.70 4856.00 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4837.80 XR: 287.70 YR: 4859.50 Centre: XC: 106.14 YC: 5535.54 Radius: R: 700.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 400.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-4 - Reclaimed Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 5.098 Analysis Summary There were: 20001 successful analyses from a total of 20001 trial failure surfaces Critical (minimum) Factor of Safety: 4.50 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4837.76 282.70 4859.50 119.63 5332.16 500.00 4.502 <-- Critical Surface 2 45.00 4837.76 283.23 4859.50 119.99 5332.10 500.00 4.508 3 45.00 4837.76 283.75 4859.50 120.36 5332.05 500.00 4.514 4 45.00 4837.76 282.70 4859.50 118.86 5340.53 508.16 4.516 5 45.53 4837.76 282.70 4859.50 119.79 5332.22 500.00 4.517 6 45.00 4837.76 284.28 4859.50 120.72 5331.99 500.00 4.520 7 45.53 4837.76 283.23 4859.50 120.16 5332.16 500.00 4.522 8 45.00 4837.76 283.23 4859.50 119.23 5340.47 508.16 4.525 9 45.00 4837.76 284.81 4859.50 121.09 5331.94 500.00 4.527 10 45.53 4837.76 283.75 4859.50 120.53 5332.11 500.00 4.528 11 45.53 4837.76 282.70 4859.50 119.03 5340.58 508.16 4.530 12 45.00 4837.76 282.70 4859.50 118.10 5348.89 516.33 4.531 13 45.00 4837.76 285.33 4859.50 121.45 5331.88 500.00 4.533 14 45.00 4837.76 283.75 4859.50 119.60 5340.42 508.16 4.534 15 45.00 4837.76 284.28 4859.50 119.96 5340.36 508.16 4.534 16 45.53 4837.76 284.28 4859.50 120.89 5332.05 500.00 4.535 17 46.05 4837.77 282.70 4859.50 119.96 5332.28 500.00 4.536 18 45.00 4837.76 283.23 4859.50 118.47 5348.83 516.33 4.536 19 45.53 4837.76 283.23 4859.50 119.40 5340.53 508.16 4.536 20 46.05 4837.77 283.23 4859.50 120.33 5332.22 500.00 4.537 21 45.00 4837.76 285.86 4859.50 121.82 5331.82 500.00 4.540 22 45.00 4837.76 284.81 4859.50 120.33 5340.31 508.16 4.540 23 45.00 4837.76 283.75 4859.50 118.83 5348.78 516.33 4.542 24 45.53 4837.76 284.81 4859.50 121.26 5332.00 500.00 4.542 25 46.05 4837.77 283.75 4859.50 120.70 5332.17 500.00 4.544 26 46.05 4837.77 282.70 4859.50 119.19 5340.64 508.16 4.545 27 45.53 4837.76 283.75 4859.50 119.76 5340.48 508.16 4.545 28 45.53 4837.76 282.70 4859.50 118.26 5348.94 516.33 4.546 29 45.00 4837.76 282.70 4859.50 117.33 5357.24 524.49 4.546 30 45.00 4837.76 285.33 4859.50 120.69 5340.25 508.16 4.547 31 45.00 4837.76 286.38 4859.50 122.18 5331.77 500.00 4.547 32 45.00 4837.76 284.28 4859.50 119.20 5348.73 516.33 4.548 33 46.58 4837.77 282.70 4859.50 120.13 5332.33 500.00 4.548 34 45.53 4837.76 285.33 4859.50 121.62 5331.94 500.00 4.549 35 46.05 4837.77 283.23 4859.50 119.56 5340.59 508.16 4.551 36 46.05 4837.77 284.28 4859.50 121.06 5332.11 500.00 4.551 37 45.53 4837.76 283.23 4859.50 118.63 5348.89 516.33 4.551 38 45.00 4837.76 283.23 4859.50 117.70 5357.19 524.49 4.552 39 45.00 4837.76 286.91 4859.50 122.54 5331.71 500.00 4.554 40 45.00 4837.76 285.86 4859.50 121.06 5340.20 508.16 4.554 41 45.53 4837.76 284.28 4859.50 120.13 5340.42 508.16 4.555 42 45.00 4837.76 284.81 4859.50 119.57 5348.67 516.33 4.555 43 45.53 4837.76 285.86 4859.50 121.99 5331.88 500.00 4.556 44 45.53 4837.76 284.81 4859.50 120.50 5340.37 508.16 4.556 45 45.53 4837.76 283.75 4859.50 119.00 5348.84 516.33 4.556 46 45.00 4837.76 283.75 4859.50 118.07 5357.13 524.49 4.557 47 46.05 4837.77 283.75 4859.50 119.93 5340.53 508.16 4.557 48 46.58 4837.77 283.23 4859.50 120.50 5332.28 500.00 4.558 49 46.05 4837.77 284.81 4859.50 121.43 5332.05 500.00 4.558 50 46.58 4837.77 283.75 4859.50 120.86 5332.22 500.00 4.559 51 46.05 4837.77 282.70 4859.50 118.43 5349.00 516.33 4.560 52 45.00 4837.76 287.44 4859.50 122.90 5331.65 500.00 4.560 53 45.53 4837.76 282.70 4859.50 117.50 5357.29 524.49 4.560 54 46.58 4837.77 282.70 4859.50 119.36 5340.70 508.16 4.560 55 45.00 4837.76 286.38 4859.50 121.42 5340.14 508.16 4.560 56 45.00 4837.76 282.70 4859.50 116.57 5365.58 532.65 4.561 57 47.11 4837.78 282.70 4859.50 120.30 5332.39 500.00 4.562 58 45.53 4837.76 285.33 4859.50 120.86 5340.31 508.16 4.562 59 45.53 4837.76 286.38 4859.50 122.35 5331.83 500.00 4.562 60 45.00 4837.76 284.28 4859.50 118.44 5357.08 524.49 4.563 61 45.53 4837.76 284.28 4859.50 119.37 5348.78 516.33 4.563 62 46.05 4837.77 285.33 4859.50 121.79 5332.00 500.00 4.564 63 45.00 4837.76 285.33 4859.50 119.94 5348.62 516.33 4.565 64 46.05 4837.77 283.23 4859.50 118.80 5348.94 516.33 4.566 65 45.53 4837.76 283.23 4859.50 117.87 5357.24 524.49 4.566 66 46.58 4837.77 283.23 4859.50 119.73 5340.64 508.16 4.566 67 46.58 4837.77 284.28 4859.50 121.23 5332.17 500.00 4.566 68 45.00 4837.76 283.23 4859.50 116.94 5365.53 532.65 4.567 69 45.00 4837.76 287.96 4859.50 123.27 5331.60 500.00 4.567 70 46.05 4837.77 284.28 4859.50 120.30 5340.48 508.16 4.567 71 45.00 4837.76 286.91 4859.50 121.79 5340.09 508.16 4.567 72 45.00 4837.76 284.81 4859.50 118.81 5357.03 524.49 4.569 73 45.53 4837.76 285.86 4859.50 121.23 5340.26 508.16 4.569 74 45.53 4837.76 286.91 4859.50 122.71 5331.77 500.00 4.569 75 45.53 4837.76 284.81 4859.50 119.74 5348.73 516.33 4.569 76 47.11 4837.78 283.23 4859.50 120.67 5332.34 500.00 4.570 77 46.05 4837.77 285.86 4859.50 122.16 5331.94 500.00 4.571 78 45.53 4837.76 283.75 4859.50 118.24 5357.19 524.49 4.571 79 46.05 4837.77 283.75 4859.50 119.17 5348.89 516.33 4.572 80 45.00 4837.76 283.75 4859.50 117.31 5365.48 532.65 4.572 81 46.58 4837.77 283.75 4859.50 120.10 5340.59 508.16 4.573 82 46.58 4837.77 284.81 4859.50 121.60 5332.11 500.00 4.573 83 45.00 4837.76 288.49 4859.50 123.63 5331.54 500.00 4.574 84 45.00 4837.76 287.44 4859.50 122.15 5340.03 508.16 4.574 85 45.00 4837.76 286.38 4859.50 120.67 5348.51 516.33 4.574 86 45.00 4837.76 285.86 4859.50 120.30 5348.57 516.33 4.574 87 45.00 4837.76 285.33 4859.50 119.18 5356.98 524.49 4.575 88 46.05 4837.77 282.70 4859.50 117.66 5357.35 524.49 4.575 89 46.58 4837.77 282.70 4859.50 118.59 5349.05 516.33 4.575 90 45.53 4837.76 282.70 4859.50 116.73 5365.64 532.65 4.575 91 45.00 4837.76 282.70 4859.50 115.81 5373.92 540.82 4.576 92 45.53 4837.76 286.38 4859.50 121.59 5340.20 508.16 4.576 93 45.53 4837.76 287.44 4859.50 123.08 5331.71 500.00 4.576 94 47.11 4837.78 282.70 4859.50 119.53 5340.75 508.16 4.576 95 46.05 4837.77 284.81 4859.50 120.66 5340.42 508.16 4.577 96 45.53 4837.76 285.33 4859.50 120.11 5348.68 516.33 4.577 97 46.05 4837.77 285.33 4859.50 121.03 5340.37 508.16 4.577 98 45.00 4837.76 284.28 4859.50 117.68 5365.43 532.65 4.577 99 47.63 4837.78 282.70 4859.50 120.46 5332.45 500.00 4.578 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4837.76 XR: 282.70 YR: 4859.50 Centre: XC: 119.63 YC: 5332.16 Radius: R: 500.00 Generated failure surface: (20 points) 45.00 4837.76 57.57 4836.03 70.17 4834.61 82.81 4833.52 95.47 4832.74 108.15 4832.29 120.83 4832.16 133.51 4832.35 146.19 4832.87 158.85 4833.70 171.48 4834.86 184.08 4836.33 196.64 4838.12 209.14 4840.24 221.59 4842.67 233.98 4845.41 246.29 4848.47 258.52 4851.84 270.66 4855.52 282.70 4859.50 Slice Geometry and Properties - Critical Failure Surface (circle 1, 42 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.83 -7.9 5.00 5.05 1 50.00 25.0 210.01 115.03 43.84 1.02 2 50.00 19.05 -7.9 7.57 7.64 1 50.00 25.0 2223.75 745.60 298.32 1.02 3 57.57 36.01 -6.4 6.30 6.34 1 50.00 25.0 4219.40 1192.13 676.37 1.02 4 63.87 53.76 -6.4 6.30 6.34 1 50.00 25.0 6306.69 1677.93 1010.53 1.02 5 70.17 71.19 -4.9 6.32 6.34 1 50.00 25.0 8358.61 2132.28 1332.71 1.01 6 76.49 88.00 -5.0 6.32 6.34 1 50.00 25.0 10338.53 2555.32 1648.28 1.01 7 82.81 104.27 -3.5 6.32 6.33 1 50.00 25.0 12255.12 2939.50 1950.22 1.01 8 89.13 120.05 -3.5 6.32 6.33 1 50.00 25.0 14116.47 3297.76 2246.41 1.01 9 95.44 131.10 -2.1 6.13 6.13 1 50.00 25.0 15327.78 3508.24 2508.53 1.00 10 101.57 145.00 -2.0 6.13 6.13 1 50.00 25.0 16781.89 3785.32 2746.45 1.00 11 107.70 163.18 -0.7 6.57 6.57 1 50.00 25.0 18825.90 4331.00 2870.18 1.00 12 114.27 163.80 -0.6 6.57 6.57 1 50.00 25.0 18945.26 4580.39 2887.91 1.00 13 120.83 129.44 0.9 5.18 5.18 1 50.00 25.0 15004.16 3771.99 2890.63 1.00 14 126.02 129.15 0.9 5.18 5.18 1 50.00 25.0 15000.22 3885.10 2889.91 1.00 15 131.20 57.56 0.9 2.31 2.32 1 50.00 25.0 6173.90 2398.60 2664.20 1.00 16 133.51 156.74 2.3 6.34 6.34 1 50.00 25.0 19315.88 9308.16 3040.99 1.00 17 139.85 155.33 2.3 6.34 6.34 1 50.00 25.0 19149.19 9206.74 3014.71 1.00 18 146.19 153.21 3.8 6.33 6.34 1 50.00 25.0 18898.94 9073.52 2974.94 1.00 19 152.52 150.79 3.8 6.33 6.34 1 50.00 25.0 18615.20 8908.33 2930.22 1.00 20 158.85 147.56 5.2 6.32 6.34 1 50.00 25.0 18236.83 8711.39 2872.14 0.99 21 165.16 144.13 5.2 6.32 6.34 1 50.00 25.0 17837.63 8482.84 2809.17 0.99 22 171.48 139.82 6.7 6.30 6.34 1 50.00 25.0 17333.78 8222.28 2732.97 0.99 23 177.78 135.39 6.7 6.30 6.34 1 50.00 25.0 16819.31 7930.36 2651.72 0.99 24 184.08 130.03 8.1 6.28 6.34 1 50.00 25.0 16193.98 7607.02 2557.50 1.00 25 190.36 124.61 8.1 6.28 6.34 1 50.00 25.0 15566.27 7251.94 2458.18 1.00 26 196.64 26.96 9.6 1.40 1.42 1 50.00 25.0 3375.17 1569.84 2391.66 1.00 27 198.03 104.06 9.6 5.56 5.63 2 10.00 35.0 13017.93 6036.41 2310.36 0.99 28 203.59 99.02 9.6 5.56 5.63 2 10.00 35.0 12356.94 5706.46 2192.93 0.99 29 209.14 104.45 11.0 6.23 6.34 2 10.00 35.0 12995.35 5997.78 2053.52 0.99 30 215.37 97.10 11.0 6.23 6.34 2 10.00 35.0 12033.59 5517.26 1901.33 0.99 31 221.59 66.85 12.5 4.61 4.72 2 10.00 35.0 8249.70 3775.64 1757.22 0.99 32 226.20 107.19 12.5 7.78 7.97 2 10.00 35.0 13041.06 5691.88 1644.26 0.99 33 233.98 79.12 13.9 6.16 6.34 2 10.00 35.0 9449.15 3888.15 1500.25 0.99 34 240.13 70.10 13.9 6.16 6.34 2 10.00 35.0 8265.22 3283.28 1311.52 0.99 35 246.29 60.20 15.4 6.11 6.34 2 10.00 35.0 6971.96 2647.32 1109.90 0.99 36 252.40 50.29 15.4 6.11 6.34 2 10.00 35.0 5671.76 1980.76 901.70 0.99 37 258.52 26.30 16.9 3.84 4.01 2 10.00 35.0 2869.20 896.16 723.42 1.00 38 262.36 23.59 16.9 4.15 4.34 1 50.00 25.0 2506.55 641.76 586.69 1.01 39 266.51 18.55 16.9 4.15 4.34 1 50.00 25.0 1924.17 301.44 448.28 1.01 40 270.66 5.31 18.3 1.47 1.54 1 50.00 25.0 536.64 23.37 351.05 1.02 41 272.12 13.45 18.3 5.29 5.57 1 50.00 25.0 1345.13 0.00 242.36 1.02 42 277.41 4.48 18.3 5.29 5.57 1 50.00 25.0 448.29 0.00 78.40 1.02 X-S Area: 3808.00 Path Length: 241.01 X-S Weight: 457112.44 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-NW4-Rec-EQ.gmf Processed: 21 Jan 2026 09:12:22 DATA: Analysis 1 - Slope Stability - Case NW-4 - Reclaimed Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4860.00 332.70 4860.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 131.20 4857.20 134.20 4857.20 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4853.00 131.20 4853.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 134.20 4853.00 332.70 4853.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4837.40 50.00 4837.80 131.20 4838.20 Profile: 6 (2 points) Material beneath: 1 - Clay 134.20 4838.20 332.70 4838.70 Profile: 7 (2 points) Material beneath: 1 - Clay 131.20 4835.20 134.20 4835.20 Slope Surface (9 points) 0.00 4837.40 50.00 4837.80 107.70 4857.10 131.20 4857.20 134.20 4857.20 226.20 4857.70 234.20 4859.00 282.70 4859.50 332.70 4859.50 Phreatic Surface (5 points) 0.00 4837.40 50.00 4837.80 131.20 4844.50 134.20 4856.00 332.70 4856.00 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4837.80 XR: 287.70 YR: 4859.50 Centre: XC: 106.14 YC: 5535.54 Radius: R: 700.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 400.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case NW-4 - Reclaimed Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.595 Analysis Summary There were: 20001 successful analyses from a total of 20001 trial failure surfaces Critical (minimum) Factor of Safety: 2.32 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4837.76 282.70 4859.50 119.63 5332.16 500.00 2.319 <-- Critical Surface 2 45.00 4837.76 283.23 4859.50 119.99 5332.10 500.00 2.319 3 45.00 4837.76 283.75 4859.50 120.36 5332.05 500.00 2.319 4 45.00 4837.76 284.28 4859.50 120.72 5331.99 500.00 2.319 5 45.00 4837.76 284.81 4859.50 121.09 5331.94 500.00 2.320 6 45.00 4837.76 285.33 4859.50 121.45 5331.88 500.00 2.320 7 45.00 4837.76 285.86 4859.50 121.82 5331.82 500.00 2.321 8 45.00 4837.76 286.38 4859.50 122.18 5331.77 500.00 2.321 9 45.00 4837.76 286.91 4859.50 122.54 5331.71 500.00 2.321 10 45.00 4837.76 287.44 4859.50 122.90 5331.65 500.00 2.322 11 45.00 4837.76 287.96 4859.50 123.27 5331.60 500.00 2.322 12 45.00 4837.76 288.49 4859.50 123.63 5331.54 500.00 2.323 13 45.00 4837.76 289.02 4859.50 123.99 5331.48 500.00 2.323 14 45.00 4837.76 289.54 4859.50 124.35 5331.42 500.00 2.323 15 45.53 4837.76 282.70 4859.50 119.79 5332.22 500.00 2.324 16 45.00 4837.76 290.07 4859.50 124.71 5331.37 500.00 2.324 17 45.53 4837.76 283.23 4859.50 120.16 5332.16 500.00 2.324 18 45.53 4837.76 283.75 4859.50 120.53 5332.11 500.00 2.324 19 45.00 4837.76 290.59 4859.50 125.07 5331.31 500.00 2.324 20 45.53 4837.76 284.28 4859.50 120.89 5332.05 500.00 2.324 21 45.00 4837.76 291.12 4859.50 125.43 5331.25 500.00 2.325 22 45.53 4837.76 284.81 4859.50 121.26 5332.00 500.00 2.325 23 45.00 4837.76 291.65 4859.50 125.79 5331.19 500.00 2.325 24 45.53 4837.76 285.33 4859.50 121.62 5331.94 500.00 2.325 25 45.00 4837.76 292.17 4859.50 126.15 5331.13 500.00 2.326 26 45.53 4837.76 285.86 4859.50 121.99 5331.88 500.00 2.326 27 45.00 4837.76 292.70 4859.50 126.51 5331.07 500.00 2.326 28 45.53 4837.76 286.38 4859.50 122.35 5331.83 500.00 2.326 29 45.53 4837.76 286.91 4859.50 122.71 5331.77 500.00 2.326 30 45.00 4837.76 282.70 4859.50 118.86 5340.53 508.16 2.327 31 45.53 4837.76 287.44 4859.50 123.08 5331.71 500.00 2.327 32 45.00 4837.76 284.28 4859.50 119.96 5340.36 508.16 2.327 33 45.53 4837.76 287.96 4859.50 123.44 5331.66 500.00 2.327 34 45.00 4837.76 284.81 4859.50 120.33 5340.31 508.16 2.327 35 45.53 4837.76 288.49 4859.50 123.80 5331.60 500.00 2.328 36 45.00 4837.76 285.33 4859.50 120.69 5340.25 508.16 2.328 37 45.53 4837.76 289.02 4859.50 124.16 5331.54 500.00 2.328 38 45.00 4837.76 285.86 4859.50 121.06 5340.20 508.16 2.328 39 45.00 4837.76 283.23 4859.50 119.23 5340.47 508.16 2.328 40 45.53 4837.76 289.54 4859.50 124.52 5331.48 500.00 2.329 41 45.00 4837.76 286.38 4859.50 121.42 5340.14 508.16 2.329 42 46.05 4837.77 283.23 4859.50 120.33 5332.22 500.00 2.329 43 45.00 4837.76 286.91 4859.50 121.79 5340.09 508.16 2.329 44 45.53 4837.76 290.07 4859.50 124.88 5331.43 500.00 2.329 45 46.05 4837.77 283.75 4859.50 120.70 5332.17 500.00 2.329 46 45.00 4837.76 287.44 4859.50 122.15 5340.03 508.16 2.329 47 45.53 4837.76 290.59 4859.50 125.25 5331.37 500.00 2.329 48 46.05 4837.77 284.28 4859.50 121.06 5332.11 500.00 2.330 49 45.00 4837.76 287.96 4859.50 122.52 5339.98 508.16 2.330 50 45.00 4837.76 283.75 4859.50 119.60 5340.42 508.16 2.330 51 45.53 4837.76 291.12 4859.50 125.61 5331.31 500.00 2.330 52 46.05 4837.77 284.81 4859.50 121.43 5332.05 500.00 2.330 53 45.00 4837.76 288.49 4859.50 122.88 5339.92 508.16 2.330 54 45.53 4837.76 291.65 4859.50 125.97 5331.25 500.00 2.330 55 46.05 4837.77 285.33 4859.50 121.79 5332.00 500.00 2.330 56 45.00 4837.76 289.02 4859.50 123.24 5339.86 508.16 2.331 57 46.05 4837.77 285.86 4859.50 122.16 5331.94 500.00 2.331 58 45.53 4837.76 292.17 4859.50 126.32 5331.19 500.00 2.331 59 45.00 4837.76 289.54 4859.50 123.60 5339.81 508.16 2.331 60 46.05 4837.77 282.70 4859.50 119.96 5332.28 500.00 2.331 61 46.05 4837.77 286.38 4859.50 122.52 5331.89 500.00 2.331 62 45.00 4837.76 290.07 4859.50 123.97 5339.75 508.16 2.331 63 45.53 4837.76 292.70 4859.50 126.68 5331.13 500.00 2.331 64 45.53 4837.76 282.70 4859.50 119.03 5340.58 508.16 2.332 65 46.05 4837.77 286.91 4859.50 122.88 5331.83 500.00 2.332 66 45.00 4837.76 290.59 4859.50 124.33 5339.69 508.16 2.332 67 45.53 4837.76 283.23 4859.50 119.40 5340.53 508.16 2.332 68 46.05 4837.77 287.44 4859.50 123.25 5331.77 500.00 2.332 69 45.00 4837.76 291.12 4859.50 124.69 5339.64 508.16 2.332 70 46.05 4837.77 287.96 4859.50 123.61 5331.72 500.00 2.333 71 45.53 4837.76 284.81 4859.50 120.50 5340.37 508.16 2.333 72 45.00 4837.76 291.65 4859.50 125.05 5339.58 508.16 2.333 73 45.53 4837.76 285.33 4859.50 120.86 5340.31 508.16 2.333 74 46.05 4837.77 288.49 4859.50 123.97 5331.66 500.00 2.333 75 45.00 4837.76 292.17 4859.50 125.41 5339.52 508.16 2.333 76 45.53 4837.76 285.86 4859.50 121.23 5340.26 508.16 2.333 77 45.53 4837.76 283.75 4859.50 119.76 5340.48 508.16 2.333 78 46.05 4837.77 289.02 4859.50 124.33 5331.60 500.00 2.333 79 45.00 4837.76 292.70 4859.50 125.77 5339.46 508.16 2.334 80 45.53 4837.76 286.38 4859.50 121.59 5340.20 508.16 2.334 81 46.05 4837.77 289.54 4859.50 124.70 5331.54 500.00 2.334 82 45.53 4837.76 286.91 4859.50 121.96 5340.15 508.16 2.334 83 46.05 4837.77 290.07 4859.50 125.06 5331.49 500.00 2.334 84 46.58 4837.77 283.75 4859.50 120.86 5332.22 500.00 2.334 85 45.53 4837.76 287.44 4859.50 122.32 5340.09 508.16 2.334 86 46.58 4837.77 282.70 4859.50 120.13 5332.33 500.00 2.335 87 46.05 4837.77 290.59 4859.50 125.42 5331.43 500.00 2.335 88 46.58 4837.77 284.28 4859.50 121.23 5332.17 500.00 2.335 89 45.53 4837.76 287.96 4859.50 122.69 5340.04 508.16 2.335 90 45.00 4837.76 283.75 4859.50 118.83 5348.78 516.33 2.335 91 45.00 4837.76 284.28 4859.50 119.20 5348.73 516.33 2.335 92 45.00 4837.76 283.23 4859.50 118.47 5348.83 516.33 2.335 93 45.00 4837.76 282.70 4859.50 118.10 5348.89 516.33 2.335 94 45.53 4837.76 284.28 4859.50 120.13 5340.42 508.16 2.335 95 46.05 4837.77 291.12 4859.50 125.78 5331.37 500.00 2.335 96 46.58 4837.77 284.81 4859.50 121.60 5332.11 500.00 2.335 97 45.53 4837.76 288.49 4859.50 123.05 5339.98 508.16 2.335 98 46.58 4837.77 285.33 4859.50 121.96 5332.06 500.00 2.336 99 46.05 4837.77 291.65 4859.50 126.14 5331.31 500.00 2.336 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4837.76 XR: 282.70 YR: 4859.50 Centre: XC: 119.63 YC: 5332.16 Radius: R: 500.00 Generated failure surface: (20 points) 45.00 4837.76 57.57 4836.03 70.17 4834.61 82.81 4833.52 95.47 4832.74 108.15 4832.29 120.83 4832.16 133.51 4832.35 146.19 4832.87 158.85 4833.70 171.48 4834.86 184.08 4836.33 196.64 4838.12 209.14 4840.24 221.59 4842.67 233.98 4845.41 246.29 4848.47 258.52 4851.84 270.66 4855.52 282.70 4859.50 Slice Geometry and Properties - Critical Failure Surface (circle 1, 42 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.83 -7.9 5.00 5.05 1 50.00 25.0 210.01 115.03 45.61 1.04 2 50.00 19.05 -7.9 7.57 7.64 1 50.00 25.0 2223.75 745.60 302.58 1.04 3 57.57 36.01 -6.4 6.30 6.34 1 50.00 25.0 4219.40 1192.13 683.05 1.03 4 63.87 53.76 -6.4 6.30 6.34 1 50.00 25.0 6306.69 1677.93 1020.08 1.03 5 70.17 71.19 -4.9 6.32 6.34 1 50.00 25.0 8358.61 2132.28 1342.19 1.02 6 76.49 88.00 -5.0 6.32 6.34 1 50.00 25.0 10338.53 2555.32 1659.91 1.02 7 82.81 104.27 -3.5 6.32 6.33 1 50.00 25.0 12255.12 2939.50 1959.83 1.01 8 89.13 120.05 -3.5 6.32 6.33 1 50.00 25.0 14116.47 3297.76 2257.46 1.01 9 95.44 131.10 -2.1 6.13 6.13 1 50.00 25.0 15327.78 3508.24 2515.73 1.01 10 101.57 145.00 -2.0 6.13 6.13 1 50.00 25.0 16781.89 3785.32 2754.27 1.01 11 107.70 163.18 -0.7 6.57 6.57 1 50.00 25.0 18825.90 4331.00 2872.92 1.00 12 114.27 163.80 -0.6 6.57 6.57 1 50.00 25.0 18945.26 4580.39 2890.22 1.00 13 120.83 129.44 0.9 5.18 5.18 1 50.00 25.0 15004.16 3771.99 2887.31 1.00 14 126.02 129.15 0.9 5.18 5.18 1 50.00 25.0 15000.22 3885.10 2886.62 1.00 15 131.20 57.56 0.9 2.31 2.32 1 50.00 25.0 6173.90 2398.60 2661.63 1.00 16 133.51 156.74 2.3 6.34 6.34 1 50.00 25.0 19315.88 9308.16 3034.41 0.99 17 139.85 155.33 2.3 6.34 6.34 1 50.00 25.0 19149.19 9206.74 3008.16 0.99 18 146.19 153.21 3.8 6.33 6.34 1 50.00 25.0 18898.94 9073.52 2964.46 0.99 19 152.52 150.79 3.8 6.33 6.34 1 50.00 25.0 18615.20 8908.33 2919.85 0.99 20 158.85 147.56 5.2 6.32 6.34 1 50.00 25.0 18236.83 8711.39 2858.07 0.99 21 165.16 144.13 5.2 6.32 6.34 1 50.00 25.0 17837.63 8482.84 2795.33 0.99 22 171.48 139.82 6.7 6.30 6.34 1 50.00 25.0 17333.78 8222.28 2715.76 0.98 23 177.78 135.39 6.7 6.30 6.34 1 50.00 25.0 16819.31 7930.36 2634.88 0.98 24 184.08 130.03 8.1 6.28 6.34 1 50.00 25.0 16193.98 7607.02 2537.65 0.98 25 190.36 124.61 8.1 6.28 6.34 1 50.00 25.0 15566.27 7251.94 2438.92 0.98 26 196.64 26.96 9.6 1.40 1.42 1 50.00 25.0 3375.17 1569.84 2369.51 0.98 27 198.03 104.06 9.6 5.56 5.63 2 10.00 35.0 13017.93 6036.41 2280.86 0.96 28 203.59 99.02 9.6 5.56 5.63 2 10.00 35.0 12356.94 5706.46 2164.82 0.96 29 209.14 104.45 11.0 6.23 6.34 2 10.00 35.0 12995.35 5997.78 2023.25 0.96 30 215.37 97.10 11.0 6.23 6.34 2 10.00 35.0 12033.59 5517.26 1873.11 0.96 31 221.59 66.85 12.5 4.61 4.72 2 10.00 35.0 8249.70 3775.64 1727.67 0.96 32 226.20 107.19 12.5 7.78 7.97 2 10.00 35.0 13041.06 5691.88 1615.55 0.96 33 233.98 79.12 13.9 6.16 6.34 2 10.00 35.0 9449.15 3888.15 1469.75 0.96 34 240.13 70.10 13.9 6.16 6.34 2 10.00 35.0 8265.22 3283.28 1284.18 0.96 35 246.29 60.20 15.4 6.11 6.34 2 10.00 35.0 6971.96 2647.32 1083.58 0.96 36 252.40 50.29 15.4 6.11 6.34 2 10.00 35.0 5671.76 1980.76 879.22 0.96 37 258.52 26.30 16.9 3.84 4.01 2 10.00 35.0 2869.20 896.16 702.52 0.96 38 262.36 23.59 16.9 4.15 4.34 1 50.00 25.0 2506.55 641.76 571.48 0.98 39 266.51 18.55 16.9 4.15 4.34 1 50.00 25.0 1924.17 301.44 434.75 0.98 40 270.66 5.31 18.3 1.47 1.54 1 50.00 25.0 536.64 23.37 337.64 0.99 41 272.12 13.45 18.3 5.29 5.57 1 50.00 25.0 1345.13 0.00 231.79 0.99 42 277.41 4.48 18.3 5.29 5.57 1 50.00 25.0 448.29 0.00 72.79 0.99 X-S Area: 3808.00 Path Length: 241.01 X-S Weight: 457112.44 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-Sl-Rec.gmf Processed: 21 Jan 2026 09:17:38 DATA: Analysis 1 - Slope Stability - Case S-1 - Reclaimed Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4863.00 208.90 4863.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 132.40 4860.60 135.40 4860.60 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4857.50 132.40 4857.50 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 135.40 4857.50 208.90 4857.50 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4841.00 50.00 4841.00 132.40 4841.00 Profile: 6 (2 points) Material beneath: 1 - Clay 135.40 4841.00 208.90 4841.10 Profile: 7 (2 points) Material beneath: 1 - Clay 132.40 4838.00 135.40 4838.00 Slope Surface (14 points) 0.00 4841.00 50.00 4841.00 108.90 4860.70 132.40 4860.60 135.40 4860.60 158.90 4860.50 169.60 4860.60 175.20 4861.60 179.60 4860.20 183.60 4861.70 189.10 4861.90 193.20 4860.70 202.70 4861.00 208.90 4862.40 Phreatic Surface (5 points) 0.00 4841.00 50.00 4841.00 132.40 4847.60 135.40 4858.20 208.90 4858.20 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4841.00 XR: 163.90 YR: 4860.55 Centre: XC: 57.16 YC: 5140.91 Radius: R: 300.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-1 - Reclaimed Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 3.897 Analysis Summary There were: 16749 successful analyses from a total of 20001 trial failure surfaces 3252 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.86 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4841.00 168.90 4860.59 81.43 5012.17 175.00 2.863 <-- Critical Surface 2 45.00 4841.00 168.37 4860.59 81.05 5012.25 175.00 2.868 3 45.00 4841.00 167.85 4860.58 80.67 5012.33 175.00 2.874 4 45.00 4841.00 167.32 4860.58 80.29 5012.40 175.00 2.879 5 45.53 4841.00 168.37 4860.59 81.19 5012.33 175.00 2.883 6 45.00 4841.00 166.79 4860.57 79.91 5012.48 175.00 2.884 7 45.53 4841.00 168.90 4860.59 81.57 5012.25 175.00 2.886 8 45.53 4841.00 167.85 4860.58 80.81 5012.41 175.00 2.888 9 45.00 4841.00 166.27 4860.57 79.53 5012.56 175.00 2.890 10 45.53 4841.00 167.32 4860.58 80.43 5012.48 175.00 2.893 11 45.00 4841.00 165.74 4860.56 79.15 5012.64 175.00 2.896 12 46.05 4841.00 168.37 4860.59 81.33 5012.41 175.00 2.898 13 46.05 4841.00 168.90 4860.59 81.71 5012.33 175.00 2.898 14 45.53 4841.00 166.79 4860.57 80.05 5012.56 175.00 2.899 15 45.00 4841.00 165.22 4860.56 78.76 5012.71 175.00 2.902 16 46.05 4841.00 167.85 4860.58 80.95 5012.48 175.00 2.903 17 45.00 4841.00 164.69 4860.55 78.38 5012.79 175.00 2.904 18 45.53 4841.00 166.27 4860.57 79.67 5012.64 175.00 2.905 19 45.00 4841.00 168.90 4860.59 80.58 5017.55 180.10 2.908 20 46.05 4841.00 167.32 4860.58 80.57 5012.56 175.00 2.908 21 46.58 4841.00 168.90 4860.59 81.85 5012.41 175.00 2.910 22 45.53 4841.00 165.74 4860.56 79.28 5012.71 175.00 2.910 23 46.58 4841.00 168.37 4860.59 81.47 5012.49 175.00 2.913 24 45.00 4841.00 168.37 4860.59 80.20 5017.63 180.10 2.913 25 46.05 4841.00 166.79 4860.57 80.19 5012.64 175.00 2.913 26 45.00 4841.00 164.16 4860.55 77.99 5012.86 175.00 2.915 27 45.53 4841.00 165.22 4860.56 78.90 5012.79 175.00 2.916 28 46.58 4841.00 167.85 4860.58 81.09 5012.56 175.00 2.917 29 45.00 4841.00 167.85 4860.58 79.82 5017.71 180.10 2.919 30 46.05 4841.00 166.27 4860.57 79.80 5012.71 175.00 2.919 31 45.53 4841.00 164.69 4860.55 78.51 5012.86 175.00 2.920 32 45.53 4841.00 168.90 4860.59 80.72 5017.63 180.10 2.922 33 45.00 4841.00 163.64 4860.54 77.60 5012.94 175.00 2.922 34 46.58 4841.00 167.32 4860.58 80.71 5012.64 175.00 2.923 35 47.11 4841.00 168.90 4860.59 81.99 5012.49 175.00 2.923 36 45.00 4841.00 167.32 4860.58 79.43 5017.78 180.10 2.924 37 46.05 4841.00 165.74 4860.56 79.42 5012.79 175.00 2.925 38 45.53 4841.00 168.37 4860.59 80.33 5017.71 180.10 2.928 39 46.58 4841.00 166.79 4860.57 80.32 5012.72 175.00 2.928 40 45.53 4841.00 164.16 4860.55 78.12 5012.94 175.00 2.930 41 45.00 4841.00 163.11 4860.54 77.22 5013.01 175.00 2.930 42 45.00 4841.00 166.79 4860.57 79.05 5017.85 180.10 2.930 43 46.05 4841.00 165.22 4860.56 79.03 5012.86 175.00 2.930 44 47.11 4841.00 167.85 4860.58 81.23 5012.64 175.00 2.932 45 45.53 4841.00 167.85 4860.58 79.95 5017.78 180.10 2.933 46 46.58 4841.00 166.27 4860.57 79.94 5012.79 175.00 2.933 47 47.11 4841.00 168.37 4860.59 81.61 5012.56 175.00 2.934 48 46.05 4841.00 164.69 4860.55 78.64 5012.94 175.00 2.935 49 45.00 4841.00 166.27 4860.57 78.66 5017.93 180.10 2.936 50 45.00 4841.00 162.58 4860.53 76.83 5013.08 175.00 2.937 51 47.11 4841.00 167.32 4860.58 80.84 5012.72 175.00 2.937 52 47.63 4841.00 168.90 4860.59 82.13 5012.57 175.00 2.938 53 45.53 4841.00 167.32 4860.58 79.57 5017.86 180.10 2.938 54 46.58 4841.00 165.74 4860.56 79.55 5012.87 175.00 2.939 55 45.00 4841.00 165.74 4860.56 78.28 5018.00 180.10 2.942 56 46.05 4841.00 168.37 4860.59 80.47 5017.78 180.10 2.942 57 47.11 4841.00 166.79 4860.57 80.46 5012.79 175.00 2.943 58 46.05 4841.00 168.90 4860.59 80.85 5017.71 180.10 2.943 59 45.53 4841.00 163.64 4860.54 77.74 5013.01 175.00 2.943 60 45.53 4841.00 166.79 4860.57 79.18 5017.93 180.10 2.944 61 46.58 4841.00 165.22 4860.56 79.16 5012.94 175.00 2.945 62 47.63 4841.00 168.37 4860.59 81.74 5012.64 175.00 2.946 63 45.00 4841.00 162.06 4860.53 76.44 5013.15 175.00 2.946 64 46.05 4841.00 167.85 4860.58 80.09 5017.86 180.10 2.947 65 47.63 4841.00 167.85 4860.58 81.36 5012.72 175.00 2.947 66 45.53 4841.00 163.11 4860.54 77.35 5013.08 175.00 2.948 67 45.00 4841.00 165.22 4860.56 77.89 5018.07 180.10 2.948 68 47.11 4841.00 166.27 4860.57 80.07 5012.87 175.00 2.948 69 45.53 4841.00 166.27 4860.57 78.80 5018.00 180.10 2.950 70 46.05 4841.00 164.16 4860.55 78.25 5013.01 175.00 2.950 71 46.05 4841.00 163.64 4860.54 77.87 5013.08 175.00 2.951 72 45.00 4841.00 168.90 4860.59 79.73 5022.92 185.20 2.952 73 47.63 4841.00 167.32 4860.58 80.98 5012.79 175.00 2.952 74 45.53 4841.00 162.58 4860.53 76.96 5013.15 175.00 2.953 75 48.16 4841.00 168.90 4860.59 82.26 5012.64 175.00 2.953 76 46.05 4841.00 167.32 4860.58 79.70 5017.93 180.10 2.953 77 46.58 4841.00 164.16 4860.55 78.39 5013.09 175.00 2.953 78 45.00 4841.00 164.69 4860.55 77.50 5018.15 180.10 2.954 79 47.11 4841.00 165.74 4860.56 79.68 5012.94 175.00 2.954 80 46.58 4841.00 168.90 4860.59 80.99 5017.78 180.10 2.955 81 45.00 4841.00 161.53 4860.52 76.05 5013.22 175.00 2.956 82 45.53 4841.00 165.74 4860.56 78.41 5018.07 180.10 2.956 83 46.58 4841.00 168.37 4860.59 80.61 5017.86 180.10 2.956 84 46.58 4841.00 164.69 4860.55 78.77 5013.01 175.00 2.957 85 47.63 4841.00 166.79 4860.57 80.59 5012.87 175.00 2.957 86 45.00 4841.00 168.37 4860.59 79.35 5022.99 185.20 2.958 87 46.05 4841.00 166.79 4860.57 79.32 5018.00 180.10 2.958 88 48.16 4841.00 168.37 4860.59 81.88 5012.72 175.00 2.959 89 45.00 4841.00 164.16 4860.55 77.11 5018.22 180.10 2.959 90 46.05 4841.00 163.11 4860.54 77.48 5013.16 175.00 2.959 91 45.53 4841.00 162.06 4860.53 76.56 5013.23 175.00 2.962 92 46.58 4841.00 167.85 4860.58 80.22 5017.93 180.10 2.962 93 47.63 4841.00 166.27 4860.57 80.20 5012.94 175.00 2.963 94 45.00 4841.00 167.85 4860.58 78.96 5023.06 185.20 2.963 95 46.05 4841.00 166.27 4860.57 78.93 5018.08 180.10 2.964 96 45.00 4841.00 161.01 4860.52 75.65 5013.29 175.00 2.965 97 47.11 4841.00 164.69 4860.55 78.91 5013.09 175.00 2.965 98 47.11 4841.00 165.22 4860.56 79.29 5013.01 175.00 2.966 99 45.53 4841.00 165.22 4860.56 78.02 5018.15 180.10 2.966 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4841.00 XR: 168.90 YR: 4860.59 Centre: XC: 81.43 YC: 5012.17 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4841.00 51.63 4839.72 58.30 4838.70 65.01 4837.94 71.75 4837.43 78.49 4837.19 85.25 4837.21 91.99 4837.48 98.72 4838.02 105.43 4838.82 112.10 4839.87 118.72 4841.18 125.29 4842.75 131.79 4844.57 138.22 4846.64 144.56 4848.95 150.81 4851.51 156.95 4854.30 162.99 4857.33 168.90 4860.59 Slice Geometry and Properties - Critical Failure Surface (circle 1, 43 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.60 -10.9 2.50 2.55 1 50.00 25.0 69.21 38.24 31.57 1.05 2 47.50 1.81 -10.9 2.50 2.55 1 50.00 25.0 207.76 114.81 87.81 1.05 3 50.00 2.27 -10.9 1.63 1.66 1 50.00 25.0 262.71 122.84 167.48 1.05 4 51.63 8.80 -8.7 3.34 3.38 1 50.00 25.0 1024.91 378.63 314.85 1.04 5 54.97 14.23 -8.7 3.34 3.38 1 50.00 25.0 1662.65 542.49 509.60 1.04 6 58.30 19.55 -6.5 3.35 3.38 1 50.00 25.0 2288.40 692.87 693.24 1.03 7 61.66 24.59 -6.5 3.35 3.38 1 50.00 25.0 2882.07 829.98 872.80 1.03 8 65.01 29.53 -4.3 3.37 3.38 1 50.00 25.0 3463.78 953.31 1039.43 1.02 9 68.38 34.17 -4.3 3.37 3.38 1 50.00 25.0 4010.85 1063.16 1203.54 1.02 10 71.75 38.68 -2.1 3.37 3.38 1 50.00 25.0 4542.76 1159.34 1353.05 1.01 11 75.12 42.90 -2.1 3.37 3.38 1 50.00 25.0 5041.59 1241.94 1501.64 1.01 12 78.49 46.92 0.1 3.38 3.38 1 50.00 25.0 5518.57 1310.74 1634.15 1.00 13 81.87 50.71 0.1 3.38 3.38 1 50.00 25.0 5967.51 1366.08 1767.09 1.00 14 85.25 54.22 2.4 3.37 3.38 1 50.00 25.0 6385.53 1407.45 1882.54 0.99 15 88.62 57.56 2.4 3.37 3.38 1 50.00 25.0 6782.95 1435.22 1999.64 0.99 16 91.99 60.54 4.6 3.37 3.38 1 50.00 25.0 7138.11 1449.12 2098.00 0.99 17 95.36 63.42 4.6 3.37 3.38 1 50.00 25.0 7483.15 1449.20 2199.26 0.99 18 98.72 11.80 6.8 0.61 0.61 1 50.00 25.0 1393.23 263.38 2245.82 0.99 19 99.33 60.13 6.8 3.05 3.07 1 50.00 25.0 7078.16 1301.59 2284.75 0.99 20 102.38 62.14 6.8 3.05 3.07 1 50.00 25.0 7273.05 1279.03 2347.40 0.99 21 105.43 73.03 9.0 3.47 3.52 1 50.00 25.0 8501.04 1423.09 2393.33 0.99 22 108.90 67.33 9.0 3.20 3.24 1 50.00 25.0 7822.67 1256.57 2393.69 0.99 23 112.10 58.40 11.2 2.85 2.90 1 50.00 25.0 6797.81 1073.82 2322.61 0.99 24 114.94 56.77 11.2 2.85 2.90 1 50.00 25.0 6619.81 1013.07 2261.41 0.99 25 117.79 18.25 11.2 0.93 0.95 2 10.00 35.0 2129.25 318.78 2192.91 0.97 26 118.72 62.64 13.4 3.28 3.38 2 10.00 35.0 7297.79 1065.87 2116.42 0.97 27 122.00 60.02 13.4 3.28 3.38 2 10.00 35.0 6971.96 956.39 2020.94 0.97 28 125.29 56.63 15.6 3.25 3.38 2 10.00 35.0 6553.32 833.26 1901.53 0.97 29 128.54 53.63 15.6 3.25 3.38 2 10.00 35.0 6177.50 696.69 1790.69 0.97 30 131.79 9.73 17.8 0.61 0.64 2 10.00 35.0 1117.59 116.47 1708.53 0.97 31 132.40 46.06 17.8 3.00 3.15 3 0.00 45.0 4835.51 1504.98 1497.30 0.94 32 135.40 40.59 17.8 2.82 2.96 2 10.00 35.0 5045.46 2218.87 1714.29 0.97 33 138.22 42.40 20.0 3.17 3.38 2 10.00 35.0 5251.63 2314.46 1575.20 0.98 34 141.39 38.68 20.0 3.17 3.38 2 10.00 35.0 4770.35 2070.66 1430.00 0.98 35 144.56 34.26 22.3 3.12 3.38 2 10.00 35.0 4200.72 1814.14 1269.73 0.98 36 147.68 30.23 22.3 3.12 3.38 2 10.00 35.0 3677.36 1544.85 1110.21 0.98 37 150.81 25.58 24.5 3.07 3.38 2 10.00 35.0 3077.92 1262.93 937.37 0.99 38 153.88 21.24 24.5 3.07 3.38 2 10.00 35.0 2515.61 968.54 763.97 0.99 39 156.95 11.11 26.7 1.95 2.18 2 10.00 35.0 1289.97 463.16 612.30 1.00 40 158.90 17.22 26.7 4.09 4.57 2 10.00 35.0 1911.87 540.84 427.88 1.00 41 162.99 4.37 28.9 1.57 1.80 1 50.00 25.0 447.40 48.66 254.39 1.05 42 164.56 3.83 28.9 2.17 2.48 1 50.00 25.0 382.84 0.00 153.08 1.05 43 166.73 1.28 28.9 2.17 2.48 1 50.00 25.0 127.54 0.00 45.10 1.05 X-S Area: 1517.87 Path Length: 128.29 X-S Weight: 177999.88 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-Sl-Rec-EQ.gmf Processed: 21 Jan 2026 09:18:24 DATA: Analysis 1 - Slope Stability - Case S-1 - Reclaimed Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4863.00 208.90 4863.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 132.40 4860.60 135.40 4860.60 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4857.50 132.40 4857.50 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 135.40 4857.50 208.90 4857.50 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4841.00 50.00 4841.00 132.40 4841.00 Profile: 6 (2 points) Material beneath: 1 - Clay 135.40 4841.00 208.90 4841.10 Profile: 7 (2 points) Material beneath: 1 - Clay 132.40 4838.00 135.40 4838.00 Slope Surface (14 points) 0.00 4841.00 50.00 4841.00 108.90 4860.70 132.40 4860.60 135.40 4860.60 158.90 4860.50 169.60 4860.60 175.20 4861.60 179.60 4860.20 183.60 4861.70 189.10 4861.90 193.20 4860.70 202.70 4861.00 208.90 4862.40 Phreatic Surface (5 points) 0.00 4841.00 50.00 4841.00 132.40 4847.60 135.40 4858.20 208.90 4858.20 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4841.00 XR: 163.90 YR: 4860.55 Centre: XC: 57.16 YC: 5140.91 Radius: R: 300.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-1 - Reclaimed Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.713 Analysis Summary There were: 16749 successful analyses from a total of 20001 trial failure surfaces 3252 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.97 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4841.00 168.90 4860.59 81.43 5012.17 175.00 1.971 <-- Critical Surface 2 45.00 4841.00 168.37 4860.59 81.05 5012.25 175.00 1.978 3 45.00 4841.00 167.85 4860.58 80.67 5012.33 175.00 1.984 4 45.53 4841.00 168.90 4860.59 81.57 5012.25 175.00 1.985 5 45.53 4841.00 168.37 4860.59 81.19 5012.33 175.00 1.987 6 45.00 4841.00 167.32 4860.58 80.29 5012.40 175.00 1.991 7 46.05 4841.00 168.90 4860.59 81.71 5012.33 175.00 1.993 8 45.53 4841.00 167.85 4860.58 80.81 5012.41 175.00 1.993 9 46.05 4841.00 168.37 4860.59 81.33 5012.41 175.00 1.996 10 45.00 4841.00 166.79 4860.57 79.91 5012.48 175.00 1.997 11 45.53 4841.00 167.32 4860.58 80.43 5012.48 175.00 2.000 12 46.58 4841.00 168.90 4860.59 81.85 5012.41 175.00 2.000 13 45.00 4841.00 168.90 4860.59 80.58 5017.55 180.10 2.002 14 46.05 4841.00 167.85 4860.58 80.95 5012.48 175.00 2.002 15 45.00 4841.00 166.27 4860.57 79.53 5012.56 175.00 2.004 16 46.58 4841.00 168.37 4860.59 81.47 5012.49 175.00 2.005 17 45.53 4841.00 166.79 4860.57 80.05 5012.56 175.00 2.006 18 47.11 4841.00 168.90 4860.59 81.99 5012.49 175.00 2.008 19 45.00 4841.00 168.37 4860.59 80.20 5017.63 180.10 2.008 20 46.05 4841.00 167.32 4860.58 80.57 5012.56 175.00 2.009 21 45.53 4841.00 168.90 4860.59 80.72 5017.63 180.10 2.010 22 45.00 4841.00 165.74 4860.56 79.15 5012.64 175.00 2.011 23 46.58 4841.00 167.85 4860.58 81.09 5012.56 175.00 2.011 24 45.53 4841.00 166.27 4860.57 79.67 5012.64 175.00 2.013 25 45.00 4841.00 167.85 4860.58 79.82 5017.71 180.10 2.015 26 46.05 4841.00 166.79 4860.57 80.19 5012.64 175.00 2.015 27 45.53 4841.00 168.37 4860.59 80.33 5017.71 180.10 2.017 28 47.63 4841.00 168.90 4860.59 82.13 5012.57 175.00 2.017 29 46.58 4841.00 167.32 4860.58 80.71 5012.64 175.00 2.018 30 47.11 4841.00 168.37 4860.59 81.61 5012.56 175.00 2.018 31 45.00 4841.00 165.22 4860.56 78.76 5012.71 175.00 2.018 32 45.53 4841.00 165.74 4860.56 79.28 5012.71 175.00 2.020 33 47.11 4841.00 167.85 4860.58 81.23 5012.64 175.00 2.020 34 45.00 4841.00 167.32 4860.58 79.43 5017.78 180.10 2.021 35 46.05 4841.00 166.27 4860.57 79.80 5012.71 175.00 2.022 36 45.00 4841.00 164.69 4860.55 78.38 5012.79 175.00 2.023 37 46.05 4841.00 168.90 4860.59 80.85 5017.71 180.10 2.023 38 45.53 4841.00 167.85 4860.58 79.95 5017.78 180.10 2.023 39 46.58 4841.00 166.79 4860.57 80.32 5012.72 175.00 2.024 40 47.63 4841.00 168.37 4860.59 81.74 5012.64 175.00 2.026 41 46.05 4841.00 168.37 4860.59 80.47 5017.78 180.10 2.026 42 48.16 4841.00 168.90 4860.59 82.26 5012.64 175.00 2.026 43 47.11 4841.00 167.32 4860.58 80.84 5012.72 175.00 2.027 44 45.53 4841.00 165.22 4860.56 78.90 5012.79 175.00 2.027 45 45.00 4841.00 166.79 4860.57 79.05 5017.85 180.10 2.028 46 46.05 4841.00 165.74 4860.56 79.42 5012.79 175.00 2.029 47 47.63 4841.00 167.85 4860.58 81.36 5012.72 175.00 2.030 48 45.53 4841.00 167.32 4860.58 79.57 5017.86 180.10 2.030 49 46.58 4841.00 168.90 4860.59 80.99 5017.78 180.10 2.031 50 46.58 4841.00 166.27 4860.57 79.94 5012.79 175.00 2.031 51 45.00 4841.00 168.90 4860.59 79.73 5022.92 185.20 2.031 52 46.05 4841.00 167.85 4860.58 80.09 5017.86 180.10 2.032 53 45.53 4841.00 164.69 4860.55 78.51 5012.86 175.00 2.033 54 48.16 4841.00 168.37 4860.59 81.88 5012.72 175.00 2.033 55 45.00 4841.00 164.16 4860.55 77.99 5012.86 175.00 2.033 56 47.11 4841.00 166.79 4860.57 80.46 5012.79 175.00 2.033 57 46.58 4841.00 168.37 4860.59 80.61 5017.86 180.10 2.035 58 48.68 4841.00 168.90 4860.59 82.40 5012.72 175.00 2.035 59 45.00 4841.00 166.27 4860.57 78.66 5017.93 180.10 2.035 60 47.63 4841.00 167.32 4860.58 80.98 5012.79 175.00 2.036 61 46.05 4841.00 165.22 4860.56 79.03 5012.86 175.00 2.036 62 45.53 4841.00 166.79 4860.57 79.18 5017.93 180.10 2.037 63 47.11 4841.00 168.90 4860.59 81.13 5017.86 180.10 2.038 64 45.00 4841.00 168.37 4860.59 79.35 5022.99 185.20 2.038 65 46.58 4841.00 165.74 4860.56 79.55 5012.87 175.00 2.038 66 46.05 4841.00 167.32 4860.58 79.70 5017.93 180.10 2.039 67 45.53 4841.00 168.90 4860.59 79.87 5022.99 185.20 2.040 68 47.11 4841.00 166.27 4860.57 80.07 5012.87 175.00 2.040 69 45.00 4841.00 163.64 4860.54 77.60 5012.94 175.00 2.041 70 46.58 4841.00 167.85 4860.58 80.22 5017.93 180.10 2.041 71 48.68 4841.00 168.37 4860.59 82.02 5012.80 175.00 2.042 72 45.53 4841.00 164.16 4860.55 78.12 5012.94 175.00 2.042 73 45.00 4841.00 165.74 4860.56 78.28 5018.00 180.10 2.042 74 46.05 4841.00 164.69 4860.55 78.64 5012.94 175.00 2.043 75 47.63 4841.00 166.79 4860.57 80.59 5012.87 175.00 2.043 76 48.16 4841.00 167.85 4860.58 81.50 5012.80 175.00 2.043 77 45.53 4841.00 166.27 4860.57 78.80 5018.00 180.10 2.044 78 49.21 4841.00 168.90 4860.59 82.53 5012.80 175.00 2.044 79 45.00 4841.00 167.85 4860.58 78.96 5023.06 185.20 2.045 80 48.16 4841.00 167.32 4860.58 81.11 5012.87 175.00 2.045 81 46.58 4841.00 165.22 4860.56 79.16 5012.94 175.00 2.045 82 46.05 4841.00 166.79 4860.57 79.32 5018.00 180.10 2.046 83 47.63 4841.00 168.90 4860.59 81.26 5017.93 180.10 2.046 84 45.53 4841.00 168.37 4860.59 79.48 5023.06 185.20 2.047 85 47.11 4841.00 165.74 4860.56 79.68 5012.94 175.00 2.047 86 46.58 4841.00 167.32 4860.58 79.84 5018.00 180.10 2.048 87 47.11 4841.00 168.37 4860.59 80.74 5017.93 180.10 2.048 88 45.00 4841.00 163.11 4860.54 77.22 5013.01 175.00 2.049 89 47.63 4841.00 166.27 4860.57 80.20 5012.94 175.00 2.049 90 45.00 4841.00 165.22 4860.56 77.89 5018.07 180.10 2.050 91 47.11 4841.00 167.85 4860.58 80.36 5018.01 180.10 2.050 92 49.21 4841.00 168.37 4860.59 82.15 5012.87 175.00 2.051 93 48.68 4841.00 167.85 4860.58 81.63 5012.87 175.00 2.051 94 45.53 4841.00 165.74 4860.56 78.41 5018.07 180.10 2.051 95 48.16 4841.00 166.79 4860.57 80.72 5012.94 175.00 2.052 96 45.00 4841.00 167.32 4860.58 78.57 5023.14 185.20 2.052 97 46.05 4841.00 166.27 4860.57 78.93 5018.08 180.10 2.053 98 45.53 4841.00 167.85 4860.58 79.09 5023.14 185.20 2.053 99 46.05 4841.00 168.90 4860.59 80.00 5023.07 185.20 2.053 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4841.00 XR: 168.90 YR: 4860.59 Centre: XC: 81.43 YC: 5012.17 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4841.00 51.63 4839.72 58.30 4838.70 65.01 4837.94 71.75 4837.43 78.49 4837.19 85.25 4837.21 91.99 4837.48 98.72 4838.02 105.43 4838.82 112.10 4839.87 118.72 4841.18 125.29 4842.75 131.79 4844.57 138.22 4846.64 144.56 4848.95 150.81 4851.51 156.95 4854.30 162.99 4857.33 168.90 4860.59 Slice Geometry and Properties - Critical Failure Surface (circle 1, 43 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.60 -10.9 2.50 2.55 1 50.00 25.0 69.21 38.24 33.41 1.07 2 47.50 1.81 -10.9 2.50 2.55 1 50.00 25.0 207.76 114.81 90.04 1.07 3 50.00 2.27 -10.9 1.63 1.66 1 50.00 25.0 262.71 122.84 170.46 1.07 4 51.63 8.80 -8.7 3.34 3.38 1 50.00 25.0 1024.91 378.63 318.48 1.05 5 54.97 14.23 -8.7 3.34 3.38 1 50.00 25.0 1662.65 542.49 514.94 1.05 6 58.30 19.55 -6.5 3.35 3.38 1 50.00 25.0 2288.40 692.87 698.37 1.03 7 61.66 24.59 -6.5 3.35 3.38 1 50.00 25.0 2882.07 829.98 879.12 1.03 8 65.01 29.53 -4.3 3.37 3.38 1 50.00 25.0 3463.78 953.31 1044.28 1.02 9 68.38 34.17 -4.3 3.37 3.38 1 50.00 25.0 4010.85 1063.16 1209.13 1.02 10 71.75 38.68 -2.1 3.37 3.38 1 50.00 25.0 4542.76 1159.34 1356.04 1.01 11 75.12 42.90 -2.1 3.37 3.38 1 50.00 25.0 5041.59 1241.94 1504.96 1.01 12 78.49 46.92 0.1 3.38 3.38 1 50.00 25.0 5518.57 1310.74 1633.91 1.00 13 81.87 50.71 0.1 3.38 3.38 1 50.00 25.0 5967.51 1366.08 1766.82 1.00 14 85.25 54.22 2.4 3.37 3.38 1 50.00 25.0 6385.53 1407.45 1877.83 0.99 15 88.62 57.56 2.4 3.37 3.38 1 50.00 25.0 6782.95 1435.22 1994.59 0.99 16 91.99 60.54 4.6 3.37 3.38 1 50.00 25.0 7138.11 1449.12 2087.73 0.98 17 95.36 63.42 4.6 3.37 3.38 1 50.00 25.0 7483.15 1449.20 2188.43 0.98 18 98.72 11.80 6.8 0.61 0.61 1 50.00 25.0 1393.23 263.38 2229.48 0.98 19 99.33 60.13 6.8 3.05 3.07 1 50.00 25.0 7078.16 1301.59 2267.98 0.98 20 102.38 62.14 6.8 3.05 3.07 1 50.00 25.0 7273.05 1279.03 2330.06 0.98 21 105.43 73.03 9.0 3.47 3.52 1 50.00 25.0 8501.04 1423.09 2369.80 0.98 22 108.90 67.33 9.0 3.20 3.24 1 50.00 25.0 7822.67 1256.57 2369.96 0.98 23 112.10 58.40 11.2 2.85 2.90 1 50.00 25.0 6797.81 1073.82 2293.90 0.97 24 114.94 56.77 11.2 2.85 2.90 1 50.00 25.0 6619.81 1013.07 2233.29 0.97 25 117.79 18.25 11.2 0.93 0.95 2 10.00 35.0 2129.25 318.78 2154.62 0.95 26 118.72 62.64 13.4 3.28 3.38 2 10.00 35.0 7297.79 1065.87 2072.27 0.95 27 122.00 60.02 13.4 3.28 3.38 2 10.00 35.0 6971.96 956.39 1978.35 0.95 28 125.29 56.63 15.6 3.25 3.38 2 10.00 35.0 6553.32 833.26 1854.59 0.94 29 128.54 53.63 15.6 3.25 3.38 2 10.00 35.0 6177.50 696.69 1745.71 0.94 30 131.79 9.73 17.8 0.61 0.64 2 10.00 35.0 1117.59 116.47 1659.35 0.94 31 132.40 46.06 17.8 3.00 3.15 3 0.00 45.0 4835.51 1504.98 1452.75 0.90 32 135.40 40.59 17.8 2.82 2.96 2 10.00 35.0 5045.46 2218.87 1683.05 0.94 33 138.22 42.40 20.0 3.17 3.38 2 10.00 35.0 5251.63 2314.46 1542.90 0.94 34 141.39 38.68 20.0 3.17 3.38 2 10.00 35.0 4770.35 2070.66 1400.32 0.94 35 144.56 34.26 22.3 3.12 3.38 2 10.00 35.0 4200.72 1814.14 1240.23 0.94 36 147.68 30.23 22.3 3.12 3.38 2 10.00 35.0 3677.36 1544.85 1083.86 0.94 37 150.81 25.58 24.5 3.07 3.38 2 10.00 35.0 3077.92 1262.93 912.35 0.95 38 153.88 21.24 24.5 3.07 3.38 2 10.00 35.0 2515.61 968.54 742.69 0.95 39 156.95 11.11 26.7 1.95 2.18 2 10.00 35.0 1289.97 463.16 592.79 0.95 40 158.90 17.22 26.7 4.09 4.57 2 10.00 35.0 1911.87 540.84 412.60 0.95 41 162.99 4.37 28.9 1.57 1.80 1 50.00 25.0 447.40 48.66 242.36 1.01 42 164.56 3.83 28.9 2.17 2.48 1 50.00 25.0 382.84 0.00 143.72 1.01 43 166.73 1.28 28.9 2.17 2.48 1 50.00 25.0 127.54 0.00 39.63 1.01 X-S Area: 1517.87 Path Length: 128.29 X-S Weight: 177999.88 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S2-Rec.gmf Processed: 21 Jan 2026 09:19:45 DATA: Analysis 1 - Slope Stability - Case S-2 - Reclaimed Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4863.00 293.90 4863.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 135.00 4859.50 138.00 4859.50 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4856.00 135.00 4856.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 138.00 4856.00 293.90 4856.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4838.80 50.00 4839.00 135.00 4839.20 Profile: 6 (2 points) Material beneath: 1 - Clay 138.00 4839.20 293.90 4839.60 Profile: 7 (2 points) Material beneath: 1 - Clay 135.00 4836.20 138.00 4836.20 Slope Surface (10 points) 0.00 4838.80 50.00 4839.00 111.50 4859.40 135.00 4859.50 138.00 4859.50 207.20 4860.00 217.80 4862.20 243.90 4862.60 250.90 4862.60 293.90 4862.40 Phreatic Surface (5 points) 0.00 4838.80 50.00 4839.00 135.00 4846.00 138.00 4856.80 293.90 4856.80 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4839.00 XR: 248.90 YR: 4862.60 Centre: XC: 67.82 YC: 5538.77 Radius: R: 700.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 400.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-2 - Reclaimed Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 5.007 Analysis Summary There were: 18839 successful analyses from a total of 20001 trial failure surfaces 1162 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 4.15 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4838.98 246.01 4862.60 88.36 5337.10 500.00 4.154 <-- Critical Surface 2 45.00 4838.98 245.48 4862.60 87.94 5337.13 500.00 4.155 3 45.00 4838.98 246.53 4862.60 88.77 5337.06 500.00 4.157 4 45.00 4838.98 244.95 4862.60 87.52 5337.17 500.00 4.157 5 45.00 4838.98 247.06 4862.60 89.19 5337.02 500.00 4.158 6 45.00 4838.98 244.43 4862.60 87.10 5337.20 500.00 4.158 7 45.00 4838.98 243.90 4862.60 86.68 5337.24 500.00 4.160 8 45.53 4838.98 246.01 4862.60 88.47 5337.13 500.00 4.165 9 45.53 4838.98 247.06 4862.60 89.30 5337.06 500.00 4.165 10 45.53 4838.98 245.48 4862.60 88.05 5337.17 500.00 4.167 11 45.00 4838.98 247.58 4862.60 89.60 5336.99 500.00 4.167 12 45.53 4838.98 244.95 4862.60 87.63 5337.21 500.00 4.168 13 45.53 4838.98 244.43 4862.60 87.21 5337.24 500.00 4.169 14 45.53 4838.98 246.53 4862.60 88.89 5337.10 500.00 4.172 15 45.53 4838.98 247.58 4862.60 89.72 5337.02 500.00 4.175 16 46.05 4838.98 247.06 4862.60 89.42 5337.10 500.00 4.175 17 46.05 4838.98 246.53 4862.60 89.00 5337.14 500.00 4.175 18 45.53 4838.98 243.90 4862.60 86.79 5337.28 500.00 4.176 19 45.00 4838.98 248.11 4862.60 90.02 5336.95 500.00 4.176 20 46.05 4838.98 246.01 4862.60 88.58 5337.17 500.00 4.177 21 46.05 4838.98 245.48 4862.60 88.17 5337.21 500.00 4.178 22 46.05 4838.98 244.95 4862.60 87.75 5337.24 500.00 4.179 23 45.00 4838.98 247.06 4862.60 88.22 5345.30 508.16 4.182 24 46.05 4838.98 243.90 4862.60 86.90 5337.31 500.00 4.183 25 46.05 4838.98 247.58 4862.60 89.84 5337.06 500.00 4.183 26 45.00 4838.98 246.53 4862.60 87.80 5345.34 508.16 4.183 27 45.00 4838.98 248.11 4862.60 89.06 5345.23 508.16 4.183 28 45.53 4838.98 248.11 4862.60 90.14 5336.99 500.00 4.184 29 45.00 4838.98 246.01 4862.60 87.38 5345.37 508.16 4.184 30 46.05 4838.98 244.43 4862.60 87.32 5337.28 500.00 4.185 31 45.00 4838.98 245.48 4862.60 86.96 5345.41 508.16 4.186 32 45.00 4838.98 248.64 4862.60 90.43 5336.91 500.00 4.186 33 46.58 4838.99 246.53 4862.60 89.12 5337.17 500.00 4.187 34 45.00 4838.98 247.58 4862.60 88.64 5345.27 508.16 4.188 35 46.58 4838.99 246.01 4862.60 88.70 5337.21 500.00 4.188 36 46.58 4838.99 245.48 4862.60 88.28 5337.24 500.00 4.189 37 45.00 4838.98 244.43 4862.60 86.12 5345.48 508.16 4.190 38 45.00 4838.98 249.69 4862.60 91.26 5336.84 500.00 4.190 39 46.58 4838.99 247.06 4862.60 89.53 5337.14 500.00 4.190 40 45.53 4838.98 248.11 4862.60 89.17 5345.27 508.16 4.190 41 46.58 4838.99 247.58 4862.60 89.95 5337.10 500.00 4.191 42 45.00 4838.98 244.95 4862.60 86.54 5345.44 508.16 4.191 43 45.00 4838.98 250.22 4862.60 91.67 5336.80 500.00 4.192 44 46.58 4838.99 244.43 4862.60 87.43 5337.31 500.00 4.192 45 45.00 4838.98 248.64 4862.60 89.47 5345.19 508.16 4.192 46 46.05 4838.98 248.11 4862.60 90.25 5337.03 500.00 4.192 47 45.53 4838.98 247.06 4862.60 88.33 5345.34 508.16 4.193 48 45.00 4838.98 243.90 4862.60 85.70 5345.51 508.16 4.193 49 45.00 4838.98 250.74 4862.60 92.08 5336.76 500.00 4.194 50 45.53 4838.98 248.64 4862.60 90.55 5336.95 500.00 4.194 51 45.53 4838.98 246.53 4862.60 87.92 5345.37 508.16 4.194 52 46.58 4838.99 244.95 4862.60 87.86 5337.28 500.00 4.195 53 45.53 4838.98 246.01 4862.60 87.50 5345.41 508.16 4.195 54 45.00 4838.98 249.16 4862.60 90.85 5336.87 500.00 4.195 55 46.58 4838.99 243.90 4862.60 87.01 5337.35 500.00 4.195 56 45.00 4838.98 251.27 4862.60 92.49 5336.72 500.00 4.196 57 45.00 4838.98 251.79 4862.60 92.91 5336.68 500.00 4.197 58 47.11 4838.99 246.53 4862.60 89.23 5337.21 500.00 4.198 59 47.11 4838.99 247.58 4862.60 90.06 5337.14 500.00 4.199 60 45.53 4838.98 244.95 4862.60 86.65 5345.48 508.16 4.199 61 45.00 4838.98 252.32 4862.59 93.32 5336.64 500.00 4.199 62 47.11 4838.99 246.01 4862.60 88.81 5337.25 500.00 4.199 63 45.53 4838.98 248.64 4862.60 89.59 5345.23 508.16 4.200 64 46.58 4838.99 248.11 4862.60 90.37 5337.07 500.00 4.200 65 45.53 4838.98 245.48 4862.60 87.07 5345.44 508.16 4.200 66 45.53 4838.98 249.69 4862.60 91.38 5336.88 500.00 4.201 67 45.00 4838.98 249.16 4862.60 89.89 5345.16 508.16 4.202 68 47.11 4838.99 244.95 4862.60 87.97 5337.32 500.00 4.202 69 46.05 4838.98 248.64 4862.60 90.67 5336.99 500.00 4.202 70 45.53 4838.98 244.43 4862.60 86.23 5345.51 508.16 4.202 71 45.00 4838.98 252.85 4862.59 93.74 5336.60 500.00 4.203 72 46.05 4838.98 247.58 4862.60 88.87 5345.34 508.16 4.203 73 45.53 4838.98 250.22 4862.60 91.79 5336.84 500.00 4.203 74 45.53 4838.98 249.16 4862.60 90.96 5336.91 500.00 4.204 75 45.53 4838.98 247.58 4862.60 88.75 5345.30 508.16 4.204 76 46.05 4838.98 247.06 4862.60 88.45 5345.38 508.16 4.204 77 47.11 4838.99 245.48 4862.60 88.39 5337.28 500.00 4.205 78 45.53 4838.98 250.74 4862.60 92.20 5336.80 500.00 4.205 79 46.05 4838.98 246.53 4862.60 88.03 5345.41 508.16 4.205 80 47.11 4838.99 244.43 4862.60 87.54 5337.35 500.00 4.205 81 46.05 4838.98 248.11 4862.60 89.28 5345.31 508.16 4.205 82 45.53 4838.98 243.90 4862.60 85.81 5345.55 508.16 4.206 83 47.11 4838.99 247.06 4862.60 89.65 5337.18 500.00 4.206 84 45.00 4838.98 253.90 4862.59 94.56 5336.52 500.00 4.207 85 45.53 4838.98 251.27 4862.60 92.62 5336.76 500.00 4.207 86 46.05 4838.98 248.64 4862.60 89.70 5345.27 508.16 4.208 87 45.00 4838.98 249.16 4862.60 88.93 5353.43 516.33 4.208 88 47.11 4838.99 248.11 4862.60 90.48 5337.10 500.00 4.208 89 46.05 4838.98 245.48 4862.60 87.19 5345.48 508.16 4.208 90 47.11 4838.99 243.90 4862.60 87.12 5337.38 500.00 4.208 91 47.63 4838.99 247.06 4862.60 89.76 5337.21 500.00 4.208 92 45.53 4838.98 251.79 4862.60 93.03 5336.72 500.00 4.209 93 47.63 4838.99 247.58 4862.60 90.18 5337.18 500.00 4.209 94 45.00 4838.98 248.11 4862.60 88.09 5353.50 516.33 4.209 95 47.63 4838.99 246.53 4862.60 89.34 5337.25 500.00 4.209 96 45.53 4838.98 249.16 4862.60 90.00 5345.20 508.16 4.210 97 46.58 4838.99 248.64 4862.60 90.78 5337.03 500.00 4.210 98 45.00 4838.98 253.37 4862.59 94.15 5336.56 500.00 4.210 99 46.05 4838.98 246.01 4862.60 87.61 5345.45 508.16 4.210 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4838.98 XR: 246.01 YR: 4862.60 Centre: XC: 88.36 YC: 5337.10 Radius: R: 500.00 Generated failure surface: (20 points) 45.00 4838.98 55.70 4838.16 66.40 4837.58 77.12 4837.22 87.85 4837.10 98.58 4837.20 109.30 4837.54 120.01 4838.10 130.70 4838.89 141.38 4839.92 152.03 4841.17 162.66 4842.65 173.25 4844.36 183.80 4846.29 194.30 4848.45 204.76 4850.83 215.16 4853.44 225.51 4856.28 235.79 4859.33 246.01 4862.60 Slice Geometry and Properties - Critical Failure Surface (circle 1, 47 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.00 -4.4 5.00 5.01 1 50.00 25.0 115.39 62.80 24.10 1.01 2 50.00 8.90 -4.4 5.70 5.71 1 50.00 25.0 1042.76 303.84 185.15 1.01 3 55.70 20.13 -3.1 5.35 5.36 1 50.00 25.0 2368.77 559.32 445.11 1.01 4 61.05 31.21 -3.1 5.35 5.36 1 50.00 25.0 3677.23 804.91 690.69 1.01 5 66.40 42.03 -1.9 5.36 5.36 1 50.00 25.0 4955.88 1031.40 927.73 1.00 6 71.76 52.51 -1.9 5.36 5.36 1 50.00 25.0 6196.04 1238.77 1159.83 1.00 7 77.12 62.72 -0.7 5.36 5.36 1 50.00 25.0 7404.28 1426.68 1382.32 1.00 8 82.49 72.59 -0.7 5.36 5.36 1 50.00 25.0 8574.70 1595.64 1600.83 1.00 9 87.85 82.16 0.6 5.36 5.36 1 50.00 25.0 9709.43 1745.11 1808.85 1.00 10 93.21 91.42 0.6 5.36 5.36 1 50.00 25.0 10808.78 1875.35 2013.64 1.00 11 98.58 48.99 1.8 2.67 2.68 1 50.00 25.0 5793.53 979.85 2159.27 1.00 12 101.25 77.72 1.8 4.02 4.02 1 50.00 25.0 9155.01 1516.74 2268.71 1.00 13 105.27 82.59 1.8 4.02 4.02 1 50.00 25.0 9653.29 1568.50 2392.15 1.00 14 109.30 47.25 3.0 2.20 2.21 1 50.00 25.0 5493.34 878.70 2479.72 1.00 15 111.50 92.07 3.0 4.25 4.26 1 50.00 25.0 10695.58 1721.41 2501.46 1.00 16 115.75 91.20 3.0 4.25 4.26 1 50.00 25.0 10615.35 1755.02 2482.75 1.00 17 120.01 113.12 4.2 5.35 5.36 1 50.00 25.0 13198.14 2237.97 2449.92 0.99 18 125.36 111.11 4.2 5.35 5.36 1 50.00 25.0 13000.35 2252.53 2413.24 0.99 19 130.70 64.97 5.5 3.18 3.19 1 50.00 25.0 7619.24 1341.10 2375.16 0.99 20 133.88 22.64 5.5 1.12 1.12 2 10.00 35.0 2657.03 469.80 2345.14 0.99 21 135.00 60.16 5.5 3.00 3.01 3 0.00 45.0 6374.08 2247.61 2093.59 0.98 22 138.00 66.80 5.5 3.38 3.40 2 10.00 35.0 8368.26 3612.51 2452.56 0.99 23 141.38 102.87 6.7 5.33 5.36 2 10.00 35.0 12871.23 5545.33 2389.44 0.99 24 146.71 99.74 6.7 5.33 5.36 2 10.00 35.0 12458.38 5335.86 2312.66 0.99 25 152.03 96.05 7.9 5.31 5.36 2 10.00 35.0 11973.15 5107.39 2223.90 0.99 26 157.35 92.32 7.9 5.31 5.36 2 10.00 35.0 11482.83 4859.77 2132.67 0.99 27 162.66 88.01 9.2 5.29 5.36 2 10.00 35.0 10917.53 4593.08 2029.74 0.99 28 167.95 83.69 9.2 5.29 5.36 2 10.00 35.0 10349.92 4307.37 1923.94 0.99 29 173.25 78.78 10.4 5.27 5.36 2 10.00 35.0 9707.38 4002.52 1807.04 0.99 30 178.52 73.88 10.4 5.27 5.36 2 10.00 35.0 9064.13 3678.81 1686.95 0.99 31 183.80 68.40 11.6 5.25 5.36 2 10.00 35.0 8347.73 3336.39 1556.23 0.99 32 189.05 62.92 11.6 5.25 5.36 2 10.00 35.0 7629.86 2974.93 1421.90 0.99 33 194.30 56.89 12.8 5.23 5.36 2 10.00 35.0 6842.03 2594.67 1277.49 0.99 34 199.53 50.85 12.8 5.23 5.36 2 10.00 35.0 6051.18 2195.64 1129.08 0.99 35 204.76 21.60 14.1 2.44 2.52 2 10.00 35.0 2544.83 888.39 1014.23 0.99 36 207.20 33.71 14.1 3.98 4.10 2 10.00 35.0 3903.13 1243.21 952.23 0.99 37 211.18 33.03 14.1 3.98 4.10 2 10.00 35.0 3715.42 987.44 904.47 0.99 38 215.16 21.42 15.3 2.64 2.73 2 10.00 35.0 2346.90 510.93 858.42 0.99 39 217.80 25.48 15.3 3.35 3.47 2 10.00 35.0 2726.22 471.75 782.96 0.99 40 221.15 22.57 15.3 3.35 3.47 2 10.00 35.0 2343.68 272.81 671.33 0.99 41 224.50 6.21 15.3 1.01 1.04 1 50.00 25.0 631.10 43.10 606.56 1.01 42 225.51 10.24 16.5 1.77 1.84 1 50.00 25.0 1030.60 30.15 561.63 1.01 43 227.28 21.06 16.5 4.26 4.44 1 50.00 25.0 2106.03 0.00 475.22 1.01 44 231.53 15.96 16.5 4.26 4.44 1 50.00 25.0 1595.63 0.00 359.21 1.01 45 235.79 10.26 17.8 4.05 4.26 1 50.00 25.0 1025.70 0.00 240.47 1.01 46 239.85 5.24 17.8 4.05 4.26 1 50.00 25.0 524.23 0.00 121.08 1.01 47 243.90 0.71 17.8 2.11 2.21 1 50.00 25.0 71.03 0.00 28.85 1.01 X-S Area: 2525.16 Path Length: 203.79 X-S Weight: 299736.34 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S2-Rec-EQ.gmf Processed: 21 Jan 2026 09:20:56 DATA: Analysis 1 - Slope Stability - Case S-2 - Reclaimed Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4863.00 293.90 4863.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 135.00 4859.50 138.00 4859.50 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4856.00 135.00 4856.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 138.00 4856.00 293.90 4856.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4838.80 50.00 4839.00 135.00 4839.20 Profile: 6 (2 points) Material beneath: 1 - Clay 138.00 4839.20 293.90 4839.60 Profile: 7 (2 points) Material beneath: 1 - Clay 135.00 4836.20 138.00 4836.20 Slope Surface (10 points) 0.00 4838.80 50.00 4839.00 111.50 4859.40 135.00 4859.50 138.00 4859.50 207.20 4860.00 217.80 4862.20 243.90 4862.60 250.90 4862.60 293.90 4862.40 Phreatic Surface (5 points) 0.00 4838.80 50.00 4839.00 135.00 4846.00 138.00 4856.80 293.90 4856.80 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4839.00 XR: 248.90 YR: 4862.60 Centre: XC: 67.82 YC: 5538.77 Radius: R: 700.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 400.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-2 - Reclaimed Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.952 Analysis Summary There were: 18839 successful analyses from a total of 20001 trial failure surfaces 1162 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.44 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4838.98 253.90 4862.59 94.56 5336.52 500.00 2.440 <-- Critical Surface 2 45.00 4838.98 252.85 4862.59 93.74 5336.60 500.00 2.444 3 45.00 4838.98 252.32 4862.59 93.32 5336.64 500.00 2.444 4 45.00 4838.98 253.37 4862.59 94.15 5336.56 500.00 2.445 5 45.00 4838.98 251.79 4862.60 92.91 5336.68 500.00 2.446 6 45.53 4838.98 253.37 4862.59 94.27 5336.60 500.00 2.447 7 45.53 4838.98 252.85 4862.59 93.86 5336.64 500.00 2.448 8 45.00 4838.98 251.27 4862.60 92.49 5336.72 500.00 2.448 9 45.00 4838.98 247.06 4862.60 89.19 5337.02 500.00 2.449 10 45.53 4838.98 252.32 4862.59 93.45 5336.68 500.00 2.450 11 45.00 4838.98 250.74 4862.60 92.08 5336.76 500.00 2.450 12 45.00 4838.98 246.53 4862.60 88.77 5337.06 500.00 2.451 13 45.53 4838.98 251.79 4862.60 93.03 5336.72 500.00 2.452 14 45.00 4838.98 247.58 4862.60 89.60 5336.99 500.00 2.452 15 45.00 4838.98 250.22 4862.60 91.67 5336.80 500.00 2.452 16 45.53 4838.98 247.06 4862.60 89.30 5337.06 500.00 2.452 17 45.00 4838.98 246.01 4862.60 88.36 5337.10 500.00 2.452 18 45.53 4838.98 251.27 4862.60 92.62 5336.76 500.00 2.453 19 45.00 4838.98 249.69 4862.60 91.26 5336.84 500.00 2.454 20 45.00 4838.98 253.90 4862.59 93.62 5344.81 508.16 2.454 21 45.00 4838.98 248.11 4862.60 90.02 5336.95 500.00 2.454 22 45.53 4838.98 247.58 4862.60 89.72 5337.02 500.00 2.455 23 46.05 4838.98 252.32 4862.59 93.57 5336.72 500.00 2.455 24 45.53 4838.98 250.74 4862.60 92.20 5336.80 500.00 2.455 25 46.58 4838.99 253.90 4862.59 94.93 5336.64 500.00 2.456 26 45.00 4838.98 253.37 4862.59 93.21 5344.85 508.16 2.456 27 46.05 4838.98 253.90 4862.59 94.81 5336.60 500.00 2.456 28 45.00 4838.98 245.48 4862.60 87.94 5337.13 500.00 2.456 29 46.05 4838.98 247.06 4862.60 89.42 5337.10 500.00 2.457 30 46.05 4838.98 251.79 4862.60 93.15 5336.76 500.00 2.457 31 45.00 4838.98 248.64 4862.60 90.43 5336.91 500.00 2.457 32 45.53 4838.98 250.22 4862.60 91.79 5336.84 500.00 2.457 33 45.00 4838.98 252.85 4862.59 92.79 5344.89 508.16 2.458 34 45.53 4838.98 248.11 4862.60 90.14 5336.99 500.00 2.458 35 45.53 4838.98 246.01 4862.60 88.47 5337.13 500.00 2.458 36 46.05 4838.98 247.58 4862.60 89.84 5337.06 500.00 2.458 37 45.00 4838.98 248.11 4862.60 89.06 5345.23 508.16 2.459 38 46.05 4838.98 251.27 4862.60 92.74 5336.80 500.00 2.459 39 45.53 4838.98 253.90 4862.59 94.69 5336.56 500.00 2.459 40 45.53 4838.98 249.69 4862.60 91.38 5336.88 500.00 2.459 41 45.53 4838.98 246.53 4862.60 88.89 5337.10 500.00 2.459 42 45.00 4838.98 252.32 4862.59 92.38 5344.93 508.16 2.459 43 46.05 4838.98 246.53 4862.60 89.00 5337.14 500.00 2.460 44 45.00 4838.98 249.16 4862.60 90.85 5336.87 500.00 2.460 45 45.00 4838.98 244.95 4862.60 87.52 5337.17 500.00 2.460 46 46.05 4838.98 253.37 4862.59 94.40 5336.64 500.00 2.460 47 47.11 4838.99 253.90 4862.59 95.06 5336.68 500.00 2.460 48 45.53 4838.98 248.64 4862.60 90.55 5336.95 500.00 2.460 49 46.05 4838.98 250.74 4862.60 92.32 5336.84 500.00 2.461 50 46.58 4838.99 253.37 4862.59 94.52 5336.68 500.00 2.461 51 45.53 4838.98 253.37 4862.59 93.33 5344.89 508.16 2.461 52 46.05 4838.98 248.11 4862.60 90.25 5337.03 500.00 2.461 53 45.00 4838.98 251.79 4862.60 91.96 5344.97 508.16 2.461 54 45.00 4838.98 248.64 4862.60 89.47 5345.19 508.16 2.461 55 46.58 4838.99 247.58 4862.60 89.95 5337.10 500.00 2.462 56 45.53 4838.98 245.48 4862.60 88.05 5337.17 500.00 2.462 57 45.53 4838.98 248.11 4862.60 89.17 5345.27 508.16 2.462 58 46.58 4838.99 251.79 4862.60 93.27 5336.80 500.00 2.462 59 47.11 4838.99 253.37 4862.59 94.64 5336.72 500.00 2.462 60 46.05 4838.98 250.22 4862.60 91.91 5336.88 500.00 2.462 61 45.53 4838.98 252.85 4862.59 92.92 5344.93 508.16 2.463 62 45.00 4838.98 251.27 4862.60 91.55 5345.01 508.16 2.463 63 45.53 4838.98 249.16 4862.60 90.96 5336.91 500.00 2.463 64 46.05 4838.98 246.01 4862.60 88.58 5337.17 500.00 2.463 65 45.00 4838.98 247.06 4862.60 88.22 5345.30 508.16 2.464 66 46.05 4838.98 248.64 4862.60 90.67 5336.99 500.00 2.464 67 45.00 4838.98 244.43 4862.60 87.10 5337.20 500.00 2.464 68 46.58 4838.99 251.27 4862.60 92.86 5336.84 500.00 2.464 69 46.05 4838.98 249.69 4862.60 91.50 5336.92 500.00 2.464 70 45.00 4838.98 249.16 4862.60 89.89 5345.16 508.16 2.464 71 46.58 4838.99 247.06 4862.60 89.53 5337.14 500.00 2.464 72 45.00 4838.98 247.58 4862.60 88.64 5345.27 508.16 2.464 73 46.58 4838.99 248.11 4862.60 90.37 5337.07 500.00 2.464 74 45.53 4838.98 252.32 4862.59 92.50 5344.97 508.16 2.465 75 45.53 4838.98 248.64 4862.60 89.59 5345.23 508.16 2.465 76 45.00 4838.98 250.74 4862.60 91.13 5345.05 508.16 2.465 77 47.11 4838.99 247.58 4862.60 90.06 5337.14 500.00 2.465 78 46.58 4838.99 246.53 4862.60 89.12 5337.17 500.00 2.465 79 45.53 4838.98 244.95 4862.60 87.63 5337.21 500.00 2.465 80 46.58 4838.99 250.74 4862.60 92.44 5336.88 500.00 2.466 81 47.63 4838.99 253.90 4862.59 95.18 5336.72 500.00 2.466 82 46.05 4838.98 252.85 4862.59 93.98 5336.68 500.00 2.466 83 46.58 4838.99 252.85 4862.59 94.10 5336.72 500.00 2.466 84 45.53 4838.98 251.79 4862.60 92.08 5345.01 508.16 2.466 85 46.05 4838.98 249.16 4862.60 91.08 5336.95 500.00 2.467 86 45.00 4838.98 249.69 4862.60 90.30 5345.12 508.16 2.467 87 47.11 4838.99 252.85 4862.59 94.23 5336.76 500.00 2.467 88 46.05 4838.98 245.48 4862.60 88.17 5337.21 500.00 2.467 89 46.58 4838.99 248.64 4862.60 90.78 5337.03 500.00 2.467 90 45.00 4838.98 246.53 4862.60 87.80 5345.34 508.16 2.467 91 45.53 4838.98 249.16 4862.60 90.00 5345.20 508.16 2.467 92 46.58 4838.99 250.22 4862.60 92.03 5336.92 500.00 2.467 93 47.63 4838.99 253.37 4862.59 94.76 5336.76 500.00 2.467 94 45.00 4838.98 243.90 4862.60 86.68 5337.24 500.00 2.468 95 47.11 4838.99 248.11 4862.60 90.48 5337.10 500.00 2.468 96 46.05 4838.98 248.64 4862.60 89.70 5345.27 508.16 2.468 97 45.53 4838.98 251.27 4862.60 91.66 5345.05 508.16 2.468 98 45.00 4838.98 249.16 4862.60 88.93 5353.43 516.33 2.468 99 45.00 4838.98 253.90 4862.59 92.69 5353.10 516.33 2.469 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4838.98 XR: 253.90 YR: 4862.59 Centre: XC: 94.56 YC: 5336.52 Radius: R: 500.00 Generated failure surface: (20 points) 45.00 4838.98 56.10 4838.00 67.23 4837.27 78.37 4836.78 89.51 4836.54 100.66 4836.55 111.80 4836.81 122.94 4837.32 134.06 4838.08 145.16 4839.08 156.24 4840.34 167.29 4841.83 178.30 4843.58 189.27 4845.57 200.19 4847.80 211.06 4850.28 221.87 4853.00 232.62 4855.95 243.29 4859.15 253.90 4862.59 Slice Geometry and Properties - Critical Failure Surface (circle 1, 44 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.16 -5.1 5.00 5.02 1 50.00 25.0 133.08 72.49 28.67 1.02 2 50.00 10.65 -5.1 6.10 6.13 1 50.00 25.0 1247.09 376.06 208.58 1.02 3 56.10 22.98 -3.8 5.56 5.57 1 50.00 25.0 2702.00 666.56 491.87 1.01 4 61.67 35.28 -3.8 5.56 5.57 1 50.00 25.0 4153.84 953.57 755.58 1.01 5 67.23 47.30 -2.5 5.57 5.57 1 50.00 25.0 5573.20 1218.69 1008.28 1.01 6 72.80 58.94 -2.5 5.57 5.57 1 50.00 25.0 6948.79 1462.57 1257.03 1.01 7 78.37 70.28 -1.2 5.57 5.57 1 50.00 25.0 8290.93 1685.04 1493.08 1.00 8 83.94 81.24 -1.2 5.57 5.57 1 50.00 25.0 9588.57 1885.78 1726.75 1.00 9 89.51 91.88 0.1 5.57 5.57 1 50.00 25.0 10849.05 2065.08 1946.11 1.00 10 95.08 102.15 0.1 5.57 5.57 1 50.00 25.0 12067.53 2222.67 2164.69 1.00 11 100.66 108.88 1.3 5.42 5.42 1 50.00 25.0 12811.16 2293.07 2354.12 1.00 12 106.08 117.94 1.3 5.42 5.42 1 50.00 25.0 13742.43 2401.29 2525.20 1.00 13 111.50 128.57 2.5 5.72 5.72 1 50.00 25.0 14934.60 2632.31 2592.30 0.99 14 117.22 127.22 2.6 5.72 5.73 1 50.00 25.0 14816.00 2707.30 2571.31 0.99 15 122.94 122.05 3.9 5.56 5.57 1 50.00 25.0 14252.61 2686.19 2534.86 0.99 16 128.50 120.08 3.9 5.56 5.57 1 50.00 25.0 14061.29 2714.04 2500.96 0.99 17 134.06 20.08 5.2 0.94 0.94 1 50.00 25.0 2355.50 461.43 2471.04 0.99 18 135.00 63.60 5.2 3.00 3.01 3 0.00 45.0 6752.74 2462.18 2199.65 0.97 19 138.00 74.90 5.2 3.58 3.60 1 50.00 25.0 9370.28 4084.26 2589.34 0.99 20 141.58 73.83 5.2 3.58 3.60 1 50.00 25.0 9245.54 4011.51 2554.76 0.99 21 145.16 24.69 6.4 1.21 1.22 1 50.00 25.0 3093.75 1340.93 2523.65 0.99 22 146.37 99.05 6.4 4.93 4.96 2 10.00 35.0 12406.43 5359.42 2469.25 0.97 23 151.31 96.48 6.4 4.93 4.96 2 10.00 35.0 12066.70 5186.88 2401.42 0.97 24 156.24 104.62 7.7 5.52 5.57 2 10.00 35.0 13061.28 5595.91 2313.22 0.97 25 161.76 100.70 7.7 5.52 5.57 2 10.00 35.0 12545.19 5335.15 2221.57 0.97 26 167.29 96.12 9.0 5.51 5.57 2 10.00 35.0 11945.84 5053.25 2114.36 0.97 27 172.79 91.54 9.0 5.51 5.57 2 10.00 35.0 11343.76 4749.94 2007.38 0.97 28 178.30 86.29 10.3 5.48 5.57 2 10.00 35.0 10657.05 4425.30 1885.64 0.97 29 183.78 81.05 10.3 5.48 5.57 2 10.00 35.0 9969.27 4079.20 1763.36 0.97 30 189.27 75.16 11.6 5.46 5.57 2 10.00 35.0 9198.88 3712.13 1627.26 0.96 31 194.73 69.28 11.6 5.46 5.57 2 10.00 35.0 8428.07 3323.90 1490.07 0.96 32 200.19 41.24 12.8 3.51 3.60 2 10.00 35.0 4986.20 1929.57 1366.82 0.96 33 203.69 38.53 12.8 3.51 3.60 2 10.00 35.0 4630.99 1750.32 1268.67 0.96 34 207.20 40.73 12.8 3.86 3.96 2 10.00 35.0 4832.31 1718.12 1201.94 0.96 35 211.06 69.96 14.1 6.74 6.95 2 10.00 35.0 8063.49 2462.04 1138.14 0.96 36 217.80 39.64 14.1 4.07 4.19 2 10.00 35.0 4442.18 1129.29 1035.76 0.96 37 221.87 46.05 15.4 5.37 5.57 2 10.00 35.0 5034.24 1065.84 881.16 0.96 38 227.24 38.54 15.4 5.37 5.57 2 10.00 35.0 4044.98 551.26 703.79 0.96 39 232.62 17.15 16.7 2.82 2.95 1 50.00 25.0 1733.03 77.80 575.94 0.99 40 235.44 20.08 16.7 3.93 4.10 1 50.00 25.0 2007.91 0.00 477.81 0.99 41 239.37 15.70 16.7 3.93 4.10 1 50.00 25.0 1569.74 0.00 372.27 0.99 42 243.29 10.77 17.9 3.80 4.00 1 50.00 25.0 1077.28 0.00 260.54 0.99 43 247.10 6.09 17.9 3.80 4.00 1 50.00 25.0 609.01 0.00 144.57 0.99 44 250.90 1.48 17.9 3.00 3.15 1 50.00 25.0 147.95 0.00 40.19 0.99 X-S Area: 2789.98 Path Length: 211.81 X-S Weight: 331791.72 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S3-Rec.gmf Processed: 21 Jan 2026 09:22:12 DATA: Analysis 1 - Slope Stability - Case S-3 - Reclaimed Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4863.00 213.40 4863.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 136.40 4858.80 139.40 4858.80 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4856.00 136.40 4856.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 139.40 4856.00 213.40 4856.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4837.70 50.00 4837.50 136.40 4837.90 Profile: 6 (2 points) Material beneath: 1 - Clay 139.40 4837.90 213.40 4838.20 Profile: 7 (2 points) Material beneath: 1 - Clay 136.40 4834.90 139.40 4834.90 Slope Surface (13 points) 0.00 4837.70 50.00 4837.50 113.00 4858.50 136.40 4858.80 139.40 4858.80 144.40 4859.20 146.90 4858.50 156.60 4861.00 163.40 4861.20 181.00 4861.90 185.60 4860.20 189.30 4862.10 213.40 4861.60 Phreatic Surface (5 points) 0.00 4837.70 50.00 4837.50 136.40 4844.90 139.40 4856.40 213.40 4856.40 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4837.50 XR: 168.40 YR: 4861.40 Centre: XC: 51.06 YC: 5137.50 Radius: R: 300.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-3 - Reclaimed Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 3.477 Analysis Summary There were: 15225 successful analyses from a total of 20001 trial failure surfaces 4776 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.63 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4837.52 173.40 4861.60 79.28 5009.13 175.00 2.633 <-- Critical Surface 2 45.00 4837.52 172.87 4861.58 78.90 5009.21 175.00 2.641 3 45.53 4837.52 173.40 4861.60 79.40 5009.21 175.00 2.644 4 45.53 4837.52 172.87 4861.58 79.02 5009.28 175.00 2.653 5 45.00 4837.52 172.35 4861.56 78.52 5009.28 175.00 2.655 6 46.05 4837.52 173.40 4861.60 79.52 5009.29 175.00 2.656 7 45.00 4837.52 171.82 4861.54 78.15 5009.35 175.00 2.659 8 45.53 4837.52 172.35 4861.56 78.64 5009.36 175.00 2.663 9 46.05 4837.52 172.87 4861.58 79.14 5009.36 175.00 2.666 10 46.58 4837.51 173.40 4861.60 79.64 5009.36 175.00 2.668 11 45.00 4837.52 171.29 4861.51 77.77 5009.42 175.00 2.669 12 45.53 4837.52 171.82 4861.54 78.27 5009.43 175.00 2.671 13 46.05 4837.52 172.35 4861.56 78.76 5009.43 175.00 2.674 14 45.00 4837.52 170.77 4861.49 77.39 5009.50 175.00 2.678 15 45.00 4837.52 173.40 4861.60 78.27 5014.52 180.10 2.680 16 45.53 4837.52 171.29 4861.51 77.89 5009.50 175.00 2.680 17 46.58 4837.51 172.87 4861.58 79.26 5009.43 175.00 2.681 18 46.05 4837.52 171.82 4861.54 78.38 5009.50 175.00 2.683 19 46.58 4837.51 172.35 4861.56 78.88 5009.51 175.00 2.686 20 47.11 4837.51 173.40 4861.60 79.76 5009.44 175.00 2.687 21 45.00 4837.52 172.87 4861.58 77.89 5014.59 180.10 2.689 22 45.53 4837.52 170.77 4861.49 77.51 5009.57 175.00 2.690 23 47.11 4837.51 172.87 4861.58 79.38 5009.51 175.00 2.690 24 45.53 4837.52 173.40 4861.60 78.38 5014.60 180.10 2.692 25 45.00 4837.52 170.24 4861.47 77.01 5009.57 175.00 2.692 26 46.05 4837.52 171.29 4861.51 78.00 5009.57 175.00 2.692 27 45.00 4837.52 169.72 4861.45 76.63 5009.64 175.00 2.694 28 46.58 4837.51 171.82 4861.54 78.50 5009.58 175.00 2.695 29 45.00 4837.52 172.35 4861.56 77.51 5014.66 180.10 2.698 30 47.11 4837.51 172.35 4861.56 79.00 5009.58 175.00 2.699 31 45.53 4837.52 172.87 4861.58 78.01 5014.67 180.10 2.701 32 46.05 4837.52 170.77 4861.49 77.62 5009.64 175.00 2.701 33 47.63 4837.51 172.87 4861.58 79.50 5009.58 175.00 2.702 34 47.63 4837.51 173.40 4861.60 79.88 5009.51 175.00 2.703 35 46.05 4837.52 173.40 4861.60 78.50 5014.67 180.10 2.703 36 46.58 4837.51 171.29 4861.51 78.12 5009.65 175.00 2.704 37 45.53 4837.52 170.24 4861.47 77.12 5009.64 175.00 2.705 38 45.00 4837.52 169.19 4861.43 76.25 5009.71 175.00 2.706 39 45.53 4837.52 169.72 4861.45 76.74 5009.71 175.00 2.707 40 45.00 4837.52 171.82 4861.54 77.13 5014.73 180.10 2.707 41 47.11 4837.51 171.82 4861.54 78.62 5009.65 175.00 2.707 42 48.16 4837.51 173.40 4861.60 80.00 5009.59 175.00 2.709 43 45.53 4837.52 172.35 4861.56 77.62 5014.74 180.10 2.710 44 46.05 4837.52 170.24 4861.47 77.24 5009.71 175.00 2.710 45 47.63 4837.51 172.35 4861.56 79.12 5009.65 175.00 2.711 46 46.05 4837.52 172.87 4861.58 78.12 5014.74 180.10 2.713 47 46.58 4837.51 170.77 4861.49 77.74 5009.72 175.00 2.713 48 45.00 4837.52 168.66 4861.41 75.86 5009.78 175.00 2.715 49 46.58 4837.51 173.40 4861.60 78.62 5014.74 180.10 2.715 50 47.11 4837.51 171.29 4861.51 78.24 5009.72 175.00 2.716 51 45.00 4837.52 171.29 4861.51 76.75 5014.80 180.10 2.716 52 48.68 4837.51 173.40 4861.60 80.11 5009.66 175.00 2.717 53 45.53 4837.52 169.19 4861.43 76.36 5009.78 175.00 2.717 54 45.53 4837.52 171.82 4861.54 77.24 5014.81 180.10 2.719 55 47.63 4837.51 171.82 4861.54 78.73 5009.72 175.00 2.719 56 46.05 4837.52 169.72 4861.45 76.86 5009.78 175.00 2.719 57 46.05 4837.52 172.35 4861.56 77.74 5014.81 180.10 2.721 58 48.16 4837.51 172.87 4861.58 79.61 5009.66 175.00 2.722 59 46.58 4837.51 170.24 4861.47 77.36 5009.79 175.00 2.722 60 48.16 4837.51 172.35 4861.56 79.23 5009.73 175.00 2.722 61 45.00 4837.52 168.14 4861.39 75.48 5009.85 175.00 2.724 62 46.58 4837.51 172.87 4861.58 78.24 5014.81 180.10 2.724 63 46.05 4837.52 169.19 4861.43 76.47 5009.85 175.00 2.725 64 45.00 4837.52 170.77 4861.49 76.36 5014.87 180.10 2.725 65 47.11 4837.51 170.77 4861.49 77.85 5009.79 175.00 2.725 66 45.53 4837.52 168.66 4861.41 75.98 5009.85 175.00 2.726 67 45.00 4837.52 173.40 4861.60 77.26 5019.89 185.20 2.727 68 47.11 4837.51 173.40 4861.60 78.74 5014.81 180.10 2.727 69 47.63 4837.51 171.29 4861.51 78.35 5009.79 175.00 2.728 70 49.21 4837.50 173.40 4861.60 80.23 5009.73 175.00 2.729 71 45.53 4837.52 171.29 4861.51 76.86 5014.87 180.10 2.729 72 46.05 4837.52 171.82 4861.54 77.36 5014.88 180.10 2.730 73 46.58 4837.51 169.72 4861.45 76.97 5009.85 175.00 2.731 74 48.16 4837.51 171.82 4861.54 78.85 5009.80 175.00 2.731 75 48.68 4837.51 172.87 4861.58 79.73 5009.73 175.00 2.731 76 45.00 4837.52 167.61 4861.37 75.09 5009.91 175.00 2.733 77 46.58 4837.51 172.35 4861.56 77.86 5014.88 180.10 2.733 78 47.11 4837.51 170.24 4861.47 77.47 5009.86 175.00 2.734 79 45.00 4837.52 170.24 4861.47 75.98 5014.94 180.10 2.734 80 48.68 4837.51 172.35 4861.56 79.35 5009.80 175.00 2.734 81 45.53 4837.52 168.14 4861.39 75.59 5009.92 175.00 2.735 82 45.00 4837.52 172.87 4861.58 76.88 5019.96 185.20 2.736 83 47.11 4837.51 172.87 4861.58 78.35 5014.88 180.10 2.736 84 45.53 4837.52 170.77 4861.49 76.48 5014.94 180.10 2.737 85 46.05 4837.52 168.66 4861.41 76.09 5009.92 175.00 2.737 86 46.58 4837.51 169.19 4861.43 76.59 5009.92 175.00 2.737 87 45.53 4837.52 173.40 4861.60 77.37 5019.96 185.20 2.738 88 47.63 4837.51 170.77 4861.49 77.97 5009.86 175.00 2.738 89 48.16 4837.51 171.29 4861.51 78.46 5009.86 175.00 2.739 90 45.00 4837.52 169.72 4861.45 75.60 5015.00 180.10 2.740 91 49.21 4837.50 172.87 4861.58 79.84 5009.80 175.00 2.741 92 49.74 4837.50 173.40 4861.60 80.34 5009.80 175.00 2.741 93 46.58 4837.51 171.82 4861.54 77.47 5014.95 180.10 2.741 94 46.05 4837.52 171.29 4861.51 76.97 5014.94 180.10 2.742 95 47.11 4837.51 169.72 4861.45 77.08 5009.92 175.00 2.742 96 48.68 4837.51 171.82 4861.54 78.96 5009.87 175.00 2.743 97 45.53 4837.52 167.61 4861.37 75.21 5009.98 175.00 2.744 98 47.63 4837.51 173.40 4861.60 78.85 5014.89 180.10 2.744 99 45.00 4837.52 167.08 4861.35 74.71 5009.98 175.00 2.744 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4837.52 XR: 173.40 YR: 4861.60 Centre: XC: 79.28 YC: 5009.13 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4837.52 51.94 4836.28 58.92 4835.32 65.93 4834.64 72.96 4834.24 80.01 4834.13 87.05 4834.30 94.08 4834.76 101.09 4835.50 108.06 4836.51 114.99 4837.81 121.85 4839.39 128.65 4841.24 135.37 4843.36 142.00 4845.76 148.52 4848.41 154.94 4851.33 161.23 4854.50 167.39 4857.93 173.40 4861.60 Slice Geometry and Properties - Critical Failure Surface (circle 1, 46 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.55 -10.1 2.50 2.54 1 50.00 25.0 62.89 34.67 29.04 1.05 2 47.50 1.64 -10.1 2.50 2.54 1 50.00 25.0 188.53 103.92 80.05 1.05 3 50.00 2.65 -10.1 1.94 1.97 1 50.00 25.0 307.27 138.70 165.13 1.05 4 51.94 9.38 -7.8 3.49 3.52 1 50.00 25.0 1094.45 390.50 321.34 1.03 5 55.43 15.12 -7.8 3.49 3.52 1 50.00 25.0 1768.70 561.70 518.14 1.03 6 58.92 20.71 -5.5 3.51 3.52 1 50.00 25.0 2427.50 717.66 702.68 1.02 7 62.42 26.00 -5.5 3.51 3.52 1 50.00 25.0 3050.67 858.27 882.80 1.02 8 65.93 31.15 -3.2 3.52 3.52 1 50.00 25.0 3657.38 983.44 1048.54 1.01 9 69.45 35.97 -3.2 3.52 3.52 1 50.00 25.0 4226.63 1093.14 1211.72 1.01 10 72.96 40.60 -0.9 3.52 3.52 1 50.00 25.0 4774.49 1187.37 1358.64 1.00 11 76.49 44.93 -0.9 3.52 3.52 1 50.00 25.0 5288.05 1266.15 1504.79 1.00 12 80.01 49.01 1.4 3.52 3.52 1 50.00 25.0 5771.77 1329.07 1632.94 1.00 13 83.53 52.84 1.4 3.52 3.52 1 50.00 25.0 6227.62 1376.62 1761.92 1.00 14 87.05 56.32 3.7 3.52 3.52 1 50.00 25.0 6642.25 1408.37 1871.34 0.99 15 90.57 59.64 3.7 3.52 3.52 1 50.00 25.0 7039.29 1424.70 1983.01 0.99 16 94.08 62.49 6.0 3.50 3.52 1 50.00 25.0 7381.47 1425.24 2073.73 0.99 17 97.59 65.29 6.0 3.50 3.52 1 50.00 25.0 7718.57 1410.22 2168.11 0.99 18 101.09 42.42 8.3 2.20 2.23 1 50.00 25.0 5018.64 877.93 2225.95 0.99 19 103.30 43.33 8.3 2.20 2.23 1 50.00 25.0 5129.17 859.39 2274.62 0.99 20 105.50 51.49 8.3 2.56 2.59 1 50.00 25.0 6082.25 975.23 2320.93 0.99 21 108.06 50.66 10.6 2.47 2.51 1 50.00 25.0 5957.43 914.33 2343.57 0.98 22 110.53 51.55 10.6 2.47 2.51 1 50.00 25.0 6036.55 874.91 2374.08 0.98 23 113.00 40.18 10.6 1.92 1.96 1 50.00 25.0 4697.35 654.14 2371.46 0.98 24 114.92 70.53 12.9 3.47 3.56 2 10.00 35.0 8239.21 1112.24 2258.17 0.97 25 118.39 67.93 12.9 3.47 3.56 2 10.00 35.0 7911.68 1001.80 2166.97 0.97 26 121.85 63.85 15.2 3.40 3.52 2 10.00 35.0 7409.44 867.94 2048.25 0.97 27 125.25 60.85 15.2 3.40 3.52 2 10.00 35.0 7029.96 728.40 1941.48 0.97 28 128.65 56.94 17.5 3.36 3.52 2 10.00 35.0 6542.41 573.60 1808.19 0.97 29 132.01 53.52 17.5 3.36 3.52 2 10.00 35.0 6107.58 403.38 1684.97 0.97 30 135.37 15.69 19.8 1.03 1.09 2 10.00 35.0 1781.58 89.20 1584.95 0.97 31 136.40 43.57 19.8 3.00 3.19 3 0.00 45.0 4548.08 1268.39 1381.16 0.93 32 139.40 35.37 19.9 2.60 2.76 2 10.00 35.0 4387.70 1915.18 1600.51 0.97 33 142.00 30.89 22.2 2.40 2.59 2 10.00 35.0 3806.18 1643.41 1490.17 0.97 34 144.40 29.02 22.2 2.50 2.70 2 10.00 35.0 3573.33 1542.27 1344.09 0.97 35 146.90 17.25 22.2 1.62 1.75 2 10.00 35.0 2120.23 909.65 1227.78 0.97 36 148.52 32.67 24.5 3.21 3.52 2 10.00 35.0 3945.98 1595.20 1145.08 0.98 37 151.73 30.65 24.5 3.21 3.52 2 10.00 35.0 3603.08 1274.67 1039.84 0.98 38 154.94 15.03 26.8 1.66 1.86 2 10.00 35.0 1724.89 540.47 946.97 0.99 39 156.60 19.16 26.8 2.31 2.59 2 10.00 35.0 2154.93 589.59 846.42 0.99 40 158.91 16.61 26.8 2.31 2.59 2 10.00 35.0 1819.65 400.85 710.06 0.99 41 161.23 13.17 29.1 2.17 2.49 2 10.00 35.0 1387.72 200.34 564.96 1.00 42 163.40 2.77 29.1 0.52 0.59 2 10.00 35.0 282.01 20.06 477.88 1.00 43 163.92 3.62 29.1 0.72 0.82 1 50.00 25.0 364.22 10.25 452.55 1.04 44 164.64 11.38 29.1 2.75 3.15 1 50.00 25.0 1138.07 0.00 367.23 1.04 45 167.39 7.74 31.4 3.01 3.52 1 50.00 25.0 773.59 0.00 221.69 1.06 46 170.39 2.58 31.4 3.01 3.52 1 50.00 25.0 258.01 0.00 66.97 1.06 X-S Area: 1554.69 Path Length: 133.87 X-S Weight: 181458.47 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S3-Rec-EQ.gmf Processed: 21 Jan 2026 09:22:54 DATA: Analysis 1 - Slope Stability - Case S-3 - Reclaimed Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4863.00 213.40 4863.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 136.40 4858.80 139.40 4858.80 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4856.00 136.40 4856.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 139.40 4856.00 213.40 4856.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4837.70 50.00 4837.50 136.40 4837.90 Profile: 6 (2 points) Material beneath: 1 - Clay 139.40 4837.90 213.40 4838.20 Profile: 7 (2 points) Material beneath: 1 - Clay 136.40 4834.90 139.40 4834.90 Slope Surface (13 points) 0.00 4837.70 50.00 4837.50 113.00 4858.50 136.40 4858.80 139.40 4858.80 144.40 4859.20 146.90 4858.50 156.60 4861.00 163.40 4861.20 181.00 4861.90 185.60 4860.20 189.30 4862.10 213.40 4861.60 Phreatic Surface (5 points) 0.00 4837.70 50.00 4837.50 136.40 4844.90 139.40 4856.40 213.40 4856.40 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4837.50 XR: 168.40 YR: 4861.40 Centre: XC: 51.06 YC: 5137.50 Radius: R: 300.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-3 - Reclaimed Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.519 Analysis Summary There were: 15225 successful analyses from a total of 20001 trial failure surfaces 4776 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.89 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4837.52 173.40 4861.60 79.28 5009.13 175.00 1.886 <-- Critical Surface 2 45.53 4837.52 173.40 4861.60 79.40 5009.21 175.00 1.893 3 45.00 4837.52 172.87 4861.58 78.90 5009.21 175.00 1.894 4 46.05 4837.52 173.40 4861.60 79.52 5009.29 175.00 1.902 5 45.53 4837.52 172.87 4861.58 79.02 5009.28 175.00 1.902 6 45.00 4837.52 172.35 4861.56 78.52 5009.28 175.00 1.905 7 46.58 4837.51 173.40 4861.60 79.64 5009.36 175.00 1.910 8 46.05 4837.52 172.87 4861.58 79.14 5009.36 175.00 1.910 9 45.00 4837.52 171.82 4861.54 78.15 5009.35 175.00 1.910 10 45.53 4837.52 172.35 4861.56 78.64 5009.36 175.00 1.911 11 46.05 4837.52 172.35 4861.56 78.76 5009.43 175.00 1.918 12 45.53 4837.52 171.82 4861.54 78.27 5009.43 175.00 1.919 13 45.00 4837.52 171.29 4861.51 77.77 5009.42 175.00 1.919 14 45.00 4837.52 173.40 4861.60 78.27 5014.52 180.10 1.920 15 46.58 4837.51 172.87 4861.58 79.26 5009.43 175.00 1.921 16 47.11 4837.51 173.40 4861.60 79.76 5009.44 175.00 1.922 17 46.58 4837.51 172.35 4861.56 78.88 5009.51 175.00 1.927 18 47.11 4837.51 172.87 4861.58 79.38 5009.51 175.00 1.927 19 46.05 4837.52 171.82 4861.54 78.38 5009.50 175.00 1.927 20 45.53 4837.52 171.29 4861.51 77.89 5009.50 175.00 1.927 21 45.00 4837.52 170.77 4861.49 77.39 5009.50 175.00 1.927 22 45.53 4837.52 173.40 4861.60 78.38 5014.60 180.10 1.928 23 45.00 4837.52 172.87 4861.58 77.89 5014.59 180.10 1.928 24 47.63 4837.51 173.40 4861.60 79.88 5009.51 175.00 1.933 25 47.11 4837.51 172.35 4861.56 79.00 5009.58 175.00 1.935 26 47.63 4837.51 172.87 4861.58 79.50 5009.58 175.00 1.935 27 46.58 4837.51 171.82 4861.54 78.50 5009.58 175.00 1.935 28 46.05 4837.52 171.29 4861.51 78.00 5009.57 175.00 1.935 29 46.05 4837.52 173.40 4861.60 78.50 5014.67 180.10 1.935 30 45.53 4837.52 170.77 4861.49 77.51 5009.57 175.00 1.935 31 45.53 4837.52 172.87 4861.58 78.01 5014.67 180.10 1.936 32 45.00 4837.52 172.35 4861.56 77.51 5014.66 180.10 1.936 33 48.16 4837.51 173.40 4861.60 80.00 5009.59 175.00 1.937 34 45.00 4837.52 170.24 4861.47 77.01 5009.57 175.00 1.939 35 48.68 4837.51 173.40 4861.60 80.11 5009.66 175.00 1.942 36 47.63 4837.51 172.35 4861.56 79.12 5009.65 175.00 1.943 37 47.11 4837.51 171.82 4861.54 78.62 5009.65 175.00 1.943 38 46.58 4837.51 171.29 4861.51 78.12 5009.65 175.00 1.943 39 45.00 4837.52 169.72 4861.45 76.63 5009.64 175.00 1.943 40 46.58 4837.51 173.40 4861.60 78.62 5014.74 180.10 1.943 41 46.05 4837.52 170.77 4861.49 77.62 5009.64 175.00 1.943 42 46.05 4837.52 172.87 4861.58 78.12 5014.74 180.10 1.944 43 45.53 4837.52 172.35 4861.56 77.62 5014.74 180.10 1.944 44 45.00 4837.52 171.82 4861.54 77.13 5014.73 180.10 1.945 45 48.16 4837.51 172.87 4861.58 79.61 5009.66 175.00 1.948 46 45.53 4837.52 170.24 4861.47 77.12 5009.64 175.00 1.948 47 49.21 4837.50 173.40 4861.60 80.23 5009.73 175.00 1.950 48 48.16 4837.51 172.35 4861.56 79.23 5009.73 175.00 1.951 49 47.63 4837.51 171.82 4861.54 78.73 5009.72 175.00 1.951 50 47.11 4837.51 171.29 4861.51 78.24 5009.72 175.00 1.951 51 47.11 4837.51 173.40 4861.60 78.74 5014.81 180.10 1.951 52 46.58 4837.51 170.77 4861.49 77.74 5009.72 175.00 1.951 53 46.58 4837.51 172.87 4861.58 78.24 5014.81 180.10 1.952 54 45.53 4837.52 169.72 4861.45 76.74 5009.71 175.00 1.952 55 46.05 4837.52 170.24 4861.47 77.24 5009.71 175.00 1.952 56 46.05 4837.52 172.35 4861.56 77.74 5014.81 180.10 1.952 57 45.53 4837.52 171.82 4861.54 77.24 5014.81 180.10 1.952 58 45.00 4837.52 169.19 4861.43 76.25 5009.71 175.00 1.953 59 45.00 4837.52 173.40 4861.60 77.26 5019.89 185.20 1.953 60 45.00 4837.52 171.29 4861.51 76.75 5014.80 180.10 1.953 61 48.68 4837.51 172.87 4861.58 79.73 5009.73 175.00 1.954 62 49.74 4837.50 173.40 4861.60 80.34 5009.80 175.00 1.958 63 48.68 4837.51 172.35 4861.56 79.35 5009.80 175.00 1.958 64 48.16 4837.51 171.82 4861.54 78.85 5009.80 175.00 1.959 65 47.63 4837.51 171.29 4861.51 78.35 5009.79 175.00 1.959 66 47.11 4837.51 172.87 4861.58 78.35 5014.88 180.10 1.959 67 47.11 4837.51 170.77 4861.49 77.85 5009.79 175.00 1.959 68 46.58 4837.51 170.24 4861.47 77.36 5009.79 175.00 1.960 69 46.58 4837.51 172.35 4861.56 77.86 5014.88 180.10 1.960 70 46.05 4837.52 169.72 4861.45 76.86 5009.78 175.00 1.960 71 46.05 4837.52 171.82 4861.54 77.36 5014.88 180.10 1.960 72 49.21 4837.50 172.87 4861.58 79.84 5009.80 175.00 1.960 73 45.53 4837.52 173.40 4861.60 77.37 5019.96 185.20 1.961 74 45.53 4837.52 169.19 4861.43 76.36 5009.78 175.00 1.961 75 45.00 4837.52 172.87 4861.58 76.88 5019.96 185.20 1.961 76 45.00 4837.52 168.66 4861.41 75.86 5009.78 175.00 1.961 77 45.00 4837.52 170.77 4861.49 76.36 5014.87 180.10 1.961 78 45.53 4837.52 171.29 4861.51 76.86 5014.87 180.10 1.962 79 47.63 4837.51 173.40 4861.60 78.85 5014.89 180.10 1.962 80 46.05 4837.52 169.19 4861.43 76.47 5009.85 175.00 1.966 81 49.21 4837.50 172.35 4861.56 79.46 5009.87 175.00 1.966 82 48.68 4837.51 171.82 4861.54 78.96 5009.87 175.00 1.966 83 48.16 4837.51 171.29 4861.51 78.46 5009.86 175.00 1.967 84 49.74 4837.50 172.87 4861.58 79.96 5009.87 175.00 1.967 85 47.63 4837.51 172.87 4861.58 78.47 5014.95 180.10 1.967 86 47.11 4837.51 172.35 4861.56 77.97 5014.95 180.10 1.967 87 47.11 4837.51 170.24 4861.47 77.47 5009.86 175.00 1.967 88 46.58 4837.51 171.82 4861.54 77.47 5014.95 180.10 1.968 89 46.58 4837.51 169.72 4861.45 76.97 5009.85 175.00 1.968 90 47.63 4837.51 170.77 4861.49 77.97 5009.86 175.00 1.968 91 46.05 4837.52 173.40 4861.60 77.49 5020.03 185.20 1.968 92 48.16 4837.51 173.40 4861.60 78.96 5014.96 180.10 1.969 93 45.53 4837.52 172.87 4861.58 76.99 5020.03 185.20 1.969 94 45.53 4837.52 168.66 4861.41 75.98 5009.85 175.00 1.969 95 45.53 4837.52 170.77 4861.49 76.48 5014.94 180.10 1.969 96 45.00 4837.52 172.35 4861.56 76.50 5020.03 185.20 1.969 97 45.00 4837.52 168.14 4861.39 75.48 5009.85 175.00 1.970 98 45.00 4837.52 170.24 4861.47 75.98 5014.94 180.10 1.970 99 46.05 4837.52 171.29 4861.51 76.97 5014.94 180.10 1.971 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4837.52 XR: 173.40 YR: 4861.60 Centre: XC: 79.28 YC: 5009.13 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4837.52 51.94 4836.28 58.92 4835.32 65.93 4834.64 72.96 4834.24 80.01 4834.13 87.05 4834.30 94.08 4834.76 101.09 4835.50 108.06 4836.51 114.99 4837.81 121.85 4839.39 128.65 4841.24 135.37 4843.36 142.00 4845.76 148.52 4848.41 154.94 4851.33 161.23 4854.50 167.39 4857.93 173.40 4861.60 Slice Geometry and Properties - Critical Failure Surface (circle 1, 46 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.55 -10.1 2.50 2.54 1 50.00 25.0 62.89 34.67 30.65 1.06 2 47.50 1.64 -10.1 2.50 2.54 1 50.00 25.0 188.53 103.92 81.97 1.06 3 50.00 2.65 -10.1 1.94 1.97 1 50.00 25.0 307.27 138.70 167.78 1.06 4 51.94 9.38 -7.8 3.49 3.52 1 50.00 25.0 1094.45 390.50 324.52 1.05 5 55.43 15.12 -7.8 3.49 3.52 1 50.00 25.0 1768.70 561.70 522.79 1.04 6 58.92 20.71 -5.5 3.51 3.52 1 50.00 25.0 2427.50 717.66 706.90 1.03 7 62.42 26.00 -5.5 3.51 3.52 1 50.00 25.0 3050.67 858.27 887.99 1.03 8 65.93 31.15 -3.2 3.52 3.52 1 50.00 25.0 3657.38 983.44 1052.05 1.02 9 69.45 35.97 -3.2 3.52 3.52 1 50.00 25.0 4226.63 1093.14 1215.77 1.02 10 72.96 40.60 -0.9 3.52 3.52 1 50.00 25.0 4774.49 1187.37 1359.91 1.00 11 76.49 44.93 -0.9 3.52 3.52 1 50.00 25.0 5288.05 1266.15 1506.20 1.00 12 80.01 49.01 1.4 3.52 3.52 1 50.00 25.0 5771.77 1329.07 1630.63 0.99 13 83.53 52.84 1.4 3.52 3.52 1 50.00 25.0 6227.62 1376.62 1759.41 0.99 14 87.05 56.32 3.7 3.52 3.52 1 50.00 25.0 6642.25 1408.37 1864.30 0.99 15 90.57 59.64 3.7 3.52 3.52 1 50.00 25.0 7039.29 1424.70 1975.48 0.99 16 94.08 62.49 6.0 3.50 3.52 1 50.00 25.0 7381.47 1425.24 2060.95 0.98 17 97.59 65.29 6.0 3.50 3.52 1 50.00 25.0 7718.57 1410.22 2154.62 0.98 18 101.09 42.42 8.3 2.20 2.23 1 50.00 25.0 5018.64 877.93 2206.77 0.98 19 103.30 43.33 8.3 2.20 2.23 1 50.00 25.0 5129.17 859.39 2254.87 0.98 20 105.50 51.49 8.3 2.56 2.59 1 50.00 25.0 6082.25 975.23 2300.63 0.98 21 108.06 50.66 10.6 2.47 2.51 1 50.00 25.0 5957.43 914.33 2317.35 0.97 22 110.53 51.55 10.6 2.47 2.51 1 50.00 25.0 6036.55 874.91 2347.28 0.97 23 113.00 40.18 10.6 1.92 1.96 1 50.00 25.0 4697.35 654.14 2344.53 0.97 24 114.92 70.53 12.9 3.47 3.56 2 10.00 35.0 8239.21 1112.24 2214.64 0.95 25 118.39 67.93 12.9 3.47 3.56 2 10.00 35.0 7911.68 1001.80 2124.65 0.95 26 121.85 63.85 15.2 3.40 3.52 2 10.00 35.0 7409.44 867.94 2000.94 0.94 27 125.25 60.85 15.2 3.40 3.52 2 10.00 35.0 7029.96 728.40 1895.91 0.94 28 128.65 56.94 17.5 3.36 3.52 2 10.00 35.0 6542.41 573.60 1758.75 0.94 29 132.01 53.52 17.5 3.36 3.52 2 10.00 35.0 6107.58 403.38 1637.75 0.94 30 135.37 15.69 19.8 1.03 1.09 2 10.00 35.0 1781.58 89.20 1534.07 0.94 31 136.40 43.57 19.8 3.00 3.19 3 0.00 45.0 4548.08 1268.39 1336.34 0.89 32 139.40 35.37 19.9 2.60 2.76 2 10.00 35.0 4387.70 1915.18 1569.61 0.94 33 142.00 30.89 22.2 2.40 2.59 2 10.00 35.0 3806.18 1643.41 1457.73 0.94 34 144.40 29.02 22.2 2.50 2.70 2 10.00 35.0 3573.33 1542.27 1314.77 0.94 35 146.90 17.25 22.2 1.62 1.75 2 10.00 35.0 2120.23 909.65 1200.83 0.94 36 148.52 32.67 24.5 3.21 3.52 2 10.00 35.0 3945.98 1595.20 1116.12 0.94 37 151.73 30.65 24.5 3.21 3.52 2 10.00 35.0 3603.08 1274.67 1011.46 0.94 38 154.94 15.03 26.8 1.66 1.86 2 10.00 35.0 1724.89 540.47 916.95 0.94 39 156.60 19.16 26.8 2.31 2.59 2 10.00 35.0 2154.93 589.59 818.08 0.94 40 158.91 16.61 26.8 2.31 2.59 2 10.00 35.0 1819.65 400.85 684.57 0.94 41 161.23 13.17 29.1 2.17 2.49 2 10.00 35.0 1387.72 200.34 540.76 0.95 42 163.40 2.77 29.1 0.52 0.59 2 10.00 35.0 282.01 20.06 455.62 0.95 43 163.92 3.62 29.1 0.72 0.82 1 50.00 25.0 364.22 10.25 433.79 1.01 44 164.64 11.38 29.1 2.75 3.15 1 50.00 25.0 1138.07 0.00 350.96 1.01 45 167.39 7.74 31.4 3.01 3.52 1 50.00 25.0 773.59 0.00 209.46 1.02 46 170.39 2.58 31.4 3.01 3.52 1 50.00 25.0 258.01 0.00 60.49 1.02 X-S Area: 1554.69 Path Length: 133.87 X-S Weight: 181458.47 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S4-Rec.gmf Processed: 21 Jan 2026 09:28:20 DATA: Analysis 1 - Slope Stability - Case S-4 - Reclaimed Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4862.00 266.60 4862.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 140.20 4859.00 143.20 4859.00 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4857.00 140.20 4857.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 143.20 4857.00 266.60 4857.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4837.10 50.00 4836.90 140.20 4836.80 Profile: 6 (2 points) Material beneath: 1 - Clay 143.20 4836.80 266.60 4836.60 Profile: 7 (2 points) Material beneath: 1 - Clay 140.20 4833.80 143.20 4833.80 Slope Surface (12 points) 0.00 4837.10 50.00 4836.90 116.70 4859.10 140.20 4859.00 143.20 4859.00 185.80 4858.90 198.10 4859.70 206.90 4861.50 212.80 4861.50 216.60 4860.60 224.60 4859.30 266.60 4859.00 Phreatic Surface (5 points) 0.00 4837.10 50.00 4836.90 140.20 4844.20 143.20 4856.80 266.60 4856.80 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4836.90 XR: 221.60 YR: 4859.79 Centre: XC: 70.69 YC: 5336.47 Radius: R: 500.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 300.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-4 - Reclaimed Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 4.251 Analysis Summary There were: 18883 successful analyses from a total of 20001 trial failure surfaces 1118 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 3.44 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4836.92 223.97 4859.40 92.33 5183.70 350.00 3.438 <-- Critical Surface 2 45.00 4836.92 223.44 4859.49 91.78 5183.78 350.00 3.439 3 45.00 4836.92 224.49 4859.32 92.88 5183.63 350.00 3.442 4 45.00 4836.92 222.92 4859.57 91.23 5183.85 350.00 3.442 5 45.00 4836.92 225.02 4859.30 93.31 5183.57 350.00 3.442 6 45.00 4836.92 221.34 4859.83 89.55 5184.07 350.00 3.445 7 45.00 4836.92 222.39 4859.66 90.67 5183.93 350.00 3.446 8 45.00 4836.92 220.81 4859.92 88.99 5184.14 350.00 3.446 9 45.00 4836.92 220.28 4860.00 88.43 5184.21 350.00 3.449 10 45.53 4836.92 223.97 4859.40 92.46 5183.76 350.00 3.450 11 45.53 4836.92 225.02 4859.30 93.44 5183.62 350.00 3.450 12 45.53 4836.92 223.44 4859.49 91.91 5183.83 350.00 3.450 13 45.00 4836.92 225.55 4859.29 93.71 5183.51 350.00 3.451 14 45.00 4836.92 221.86 4859.74 90.11 5184.00 350.00 3.451 15 45.53 4836.92 222.92 4859.57 91.35 5183.91 350.00 3.452 16 45.00 4836.92 219.23 4860.17 87.30 5184.35 350.00 3.453 17 45.53 4836.92 222.39 4859.66 90.79 5183.98 350.00 3.454 18 45.53 4836.92 220.81 4859.92 89.11 5184.19 350.00 3.457 19 45.53 4836.92 224.49 4859.32 93.01 5183.68 350.00 3.458 20 45.00 4836.92 218.71 4860.26 86.73 5184.42 350.00 3.458 21 45.00 4836.92 219.76 4860.09 87.87 5184.29 350.00 3.458 22 45.53 4836.92 221.86 4859.74 90.24 5184.05 350.00 3.459 23 45.53 4836.92 225.55 4859.29 93.84 5183.57 350.00 3.459 24 46.05 4836.92 224.49 4859.32 93.14 5183.73 350.00 3.459 25 45.53 4836.92 220.28 4860.00 88.55 5184.26 350.00 3.459 26 46.05 4836.92 225.02 4859.30 93.57 5183.67 350.00 3.460 27 46.05 4836.92 223.97 4859.40 92.59 5183.81 350.00 3.461 28 45.00 4836.92 226.07 4859.29 94.11 5183.46 350.00 3.461 29 46.05 4836.92 223.44 4859.49 92.03 5183.88 350.00 3.461 30 45.53 4836.92 219.76 4860.09 87.98 5184.33 350.00 3.462 31 45.00 4836.92 218.18 4860.34 86.16 5184.49 350.00 3.463 32 46.05 4836.92 222.92 4859.57 91.48 5183.96 350.00 3.463 33 46.05 4836.92 222.39 4859.66 90.92 5184.03 350.00 3.464 34 45.53 4836.92 221.34 4859.83 89.68 5184.12 350.00 3.464 35 45.53 4836.92 219.23 4860.17 87.42 5184.40 350.00 3.465 36 45.00 4836.92 225.02 4859.30 92.53 5189.86 356.12 3.466 37 46.05 4836.92 221.86 4859.74 90.36 5184.10 350.00 3.466 38 45.00 4836.92 224.49 4859.32 92.10 5189.91 356.12 3.466 39 46.05 4836.92 225.55 4859.29 93.97 5183.62 350.00 3.467 40 45.00 4836.92 223.97 4859.40 91.54 5189.99 356.12 3.468 41 45.00 4836.92 217.65 4860.43 85.59 5184.56 350.00 3.468 42 45.00 4836.92 223.44 4859.49 90.99 5190.06 356.12 3.469 43 45.53 4836.92 226.07 4859.29 94.24 5183.51 350.00 3.469 44 45.00 4836.92 225.55 4859.29 92.93 5189.80 356.12 3.469 45 45.53 4836.92 218.71 4860.26 86.85 5184.47 350.00 3.470 46 45.00 4836.92 226.07 4859.29 93.33 5189.75 356.12 3.470 47 46.58 4836.91 224.49 4859.32 93.27 5183.79 350.00 3.471 48 46.05 4836.92 221.34 4859.83 89.80 5184.17 350.00 3.471 49 45.00 4836.92 226.60 4859.29 94.50 5183.40 350.00 3.471 50 45.00 4836.92 222.92 4859.57 90.43 5190.13 356.12 3.472 51 46.58 4836.91 223.97 4859.40 92.71 5183.86 350.00 3.472 52 46.58 4836.91 223.44 4859.49 92.16 5183.93 350.00 3.472 53 46.05 4836.92 219.76 4860.09 88.10 5184.38 350.00 3.473 54 45.00 4836.92 221.34 4859.83 88.74 5190.35 356.12 3.474 55 46.58 4836.91 222.92 4859.57 91.60 5184.01 350.00 3.474 56 46.58 4836.91 222.39 4859.66 91.04 5184.08 350.00 3.474 57 45.53 4836.92 218.18 4860.34 86.28 5184.54 350.00 3.475 58 46.05 4836.92 220.28 4860.00 88.67 5184.31 350.00 3.475 59 45.00 4836.92 217.13 4860.51 85.02 5184.62 350.00 3.475 60 46.58 4836.91 225.55 4859.29 94.10 5183.67 350.00 3.475 61 46.58 4836.91 221.86 4859.74 90.48 5184.15 350.00 3.475 62 46.58 4836.91 225.02 4859.30 93.70 5183.73 350.00 3.475 63 45.00 4836.92 222.39 4859.66 89.87 5190.21 356.12 3.476 64 46.05 4836.92 219.23 4860.17 87.53 5184.45 350.00 3.476 65 45.53 4836.92 225.02 4859.30 92.66 5189.91 356.12 3.477 66 46.05 4836.92 220.81 4859.92 89.23 5184.24 350.00 3.477 67 46.05 4836.92 226.07 4859.29 94.37 5183.56 350.00 3.477 68 47.11 4836.91 225.55 4859.29 94.23 5183.72 350.00 3.477 69 45.53 4836.92 224.49 4859.32 92.23 5189.97 356.12 3.477 70 45.53 4836.92 226.07 4859.29 93.46 5189.80 356.12 3.478 71 46.58 4836.91 221.34 4859.83 89.92 5184.22 350.00 3.478 72 45.00 4836.92 220.28 4860.00 87.60 5190.48 356.12 3.479 73 45.53 4836.92 223.97 4859.40 91.67 5190.04 356.12 3.479 74 45.53 4836.92 226.60 4859.29 94.64 5183.46 350.00 3.479 75 45.53 4836.92 223.44 4859.49 91.11 5190.11 356.12 3.479 76 45.00 4836.92 216.60 4860.60 84.44 5184.69 350.00 3.480 77 46.58 4836.91 226.07 4859.29 94.50 5183.62 350.00 3.480 78 45.00 4836.92 226.60 4859.29 93.73 5189.69 356.12 3.480 79 45.53 4836.92 217.65 4860.43 85.70 5184.60 350.00 3.481 80 46.05 4836.92 218.71 4860.26 86.96 5184.52 350.00 3.481 81 45.00 4836.92 221.86 4859.74 89.30 5190.28 356.12 3.481 82 45.53 4836.92 222.92 4859.57 90.55 5190.18 356.12 3.482 83 47.11 4836.91 224.49 4859.32 93.40 5183.84 350.00 3.482 84 46.05 4836.92 226.60 4859.29 94.77 5183.51 350.00 3.482 85 45.53 4836.92 222.39 4859.66 89.99 5190.25 356.12 3.483 86 45.00 4836.92 219.76 4860.09 87.03 5190.55 356.12 3.483 87 47.11 4836.91 223.97 4859.40 92.84 5183.91 350.00 3.483 88 47.11 4836.91 223.44 4859.49 92.28 5183.98 350.00 3.484 89 45.00 4836.92 220.81 4859.92 88.17 5190.42 356.12 3.485 90 46.58 4836.91 219.76 4860.09 88.22 5184.43 350.00 3.485 91 45.53 4836.92 225.55 4859.29 93.06 5189.85 356.12 3.485 92 47.11 4836.91 222.39 4859.66 91.16 5184.13 350.00 3.485 93 47.11 4836.91 222.92 4859.57 91.72 5184.06 350.00 3.485 94 46.05 4836.92 218.18 4860.34 86.39 5184.58 350.00 3.486 95 47.11 4836.91 221.86 4859.74 90.60 5184.20 350.00 3.486 96 45.53 4836.92 217.13 4860.51 85.13 5184.67 350.00 3.486 97 47.63 4836.91 225.02 4859.30 93.96 5183.83 350.00 3.487 98 45.00 4836.92 219.23 4860.17 86.46 5190.62 356.12 3.487 99 47.11 4836.91 221.34 4859.83 90.04 5184.27 350.00 3.487 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4836.92 XR: 223.97 YR: 4859.40 Centre: XC: 92.33 YC: 5183.70 Radius: R: 350.00 Generated failure surface: (20 points) 45.00 4836.92 54.53 4835.75 64.09 4834.85 73.67 4834.20 83.26 4833.82 92.86 4833.71 102.46 4833.85 112.06 4834.26 121.63 4834.93 131.19 4835.87 140.72 4837.06 150.21 4838.52 159.65 4840.24 169.05 4842.22 178.39 4844.45 187.66 4846.94 196.86 4849.68 205.99 4852.67 215.02 4855.91 223.97 4859.40 Slice Geometry and Properties - Critical Failure Surface (circle 1, 46 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.48 -7.0 5.00 5.04 1 50.00 25.0 170.42 93.16 36.16 1.02 2 50.00 7.36 -7.0 4.53 4.56 1 50.00 25.0 858.67 299.96 193.44 1.02 3 54.53 17.58 -5.4 4.78 4.80 1 50.00 25.0 2062.09 579.53 436.90 1.02 4 59.31 27.34 -5.4 4.78 4.80 1 50.00 25.0 3213.30 830.98 680.23 1.02 5 64.09 36.89 -3.8 4.79 4.80 1 50.00 25.0 4338.98 1062.95 913.14 1.01 6 68.88 46.07 -3.8 4.79 4.80 1 50.00 25.0 5422.87 1275.63 1141.10 1.01 7 73.67 55.01 -2.3 4.80 4.80 1 50.00 25.0 6480.58 1468.57 1357.22 1.01 8 78.47 63.58 -2.3 4.80 4.80 1 50.00 25.0 7494.44 1641.74 1569.51 1.01 9 83.26 71.90 -0.7 4.80 4.80 1 50.00 25.0 8478.69 1795.36 1768.73 1.00 10 88.06 79.85 -0.7 4.80 4.80 1 50.00 25.0 9421.44 1929.35 1965.39 1.00 11 92.86 87.48 0.9 4.80 4.80 1 50.00 25.0 10327.09 2043.55 2147.66 1.00 12 97.66 94.80 0.9 4.80 4.80 1 50.00 25.0 11197.25 2138.05 2328.57 1.00 13 102.46 83.57 2.4 3.96 3.97 1 50.00 25.0 9875.98 1824.59 2479.55 1.00 14 106.43 88.12 2.4 3.96 3.97 1 50.00 25.0 10419.21 1861.93 2615.91 1.00 15 110.39 38.41 2.4 1.67 1.67 1 50.00 25.0 4535.96 794.05 2708.62 1.00 16 112.06 110.99 4.0 4.64 4.65 1 50.00 25.0 13039.59 2232.65 2785.21 0.99 17 116.70 120.05 4.0 4.93 4.95 1 50.00 25.0 14071.08 2388.39 2828.26 0.99 18 121.63 114.20 5.6 4.78 4.80 1 50.00 25.0 13420.00 2313.85 2776.91 0.99 19 126.41 111.87 5.6 4.78 4.80 1 50.00 25.0 13181.52 2289.72 2727.59 0.99 20 131.19 85.18 7.2 3.72 3.74 1 50.00 25.0 10062.31 1756.87 2669.22 0.99 21 134.91 83.39 7.2 3.72 3.74 1 50.00 25.0 9874.09 1718.09 2619.22 0.99 22 138.62 34.92 7.2 1.58 1.59 2 10.00 35.0 4139.43 718.84 2565.87 0.98 23 140.20 65.35 8.5 3.00 3.03 3 0.00 45.0 6933.78 2514.17 2249.78 0.97 24 143.20 74.56 8.7 3.50 3.54 2 10.00 35.0 9472.01 4221.10 2657.30 0.98 25 146.70 72.64 8.7 3.50 3.54 2 10.00 35.0 9224.03 4102.08 2587.64 0.98 26 150.21 94.59 10.3 4.72 4.80 2 10.00 35.0 12001.96 5346.55 2489.54 0.98 27 154.93 90.48 10.3 4.72 4.80 2 10.00 35.0 11469.24 5089.24 2378.87 0.98 28 159.65 85.61 11.9 4.70 4.80 2 10.00 35.0 10839.28 4812.82 2253.04 0.98 29 164.35 80.91 11.9 4.70 4.80 2 10.00 35.0 10230.71 4516.91 2126.29 0.98 30 169.05 75.45 13.4 4.67 4.80 2 10.00 35.0 9523.71 4201.59 1985.02 0.98 31 173.72 70.19 13.5 4.67 4.80 2 10.00 35.0 8840.91 3867.17 1842.30 0.98 32 178.39 51.77 15.0 3.71 3.84 2 10.00 35.0 6505.62 2838.42 1701.98 0.98 33 182.09 48.05 15.0 3.71 3.84 2 10.00 35.0 6023.15 2600.17 1575.35 0.98 34 185.80 22.84 15.0 1.86 1.93 2 10.00 35.0 2854.49 1216.01 1486.15 0.98 35 187.66 53.13 16.6 4.60 4.80 2 10.00 35.0 6593.70 2749.22 1383.10 0.98 36 192.26 48.20 16.6 4.60 4.80 2 10.00 35.0 5911.62 2338.55 1238.46 0.98 37 196.86 12.10 18.2 1.24 1.30 2 10.00 35.0 1470.18 562.04 1140.10 0.99 38 198.10 36.95 18.2 3.94 4.15 2 10.00 35.0 4425.00 1571.34 1074.80 0.99 39 202.04 35.03 18.2 3.94 4.15 2 10.00 35.0 4079.86 1236.41 987.69 0.99 40 205.99 7.84 19.7 0.91 0.97 2 10.00 35.0 894.98 240.26 928.24 0.99 41 206.90 43.91 19.7 5.90 6.27 2 10.00 35.0 4894.10 1072.54 783.71 0.99 42 212.80 12.72 19.7 2.22 2.36 2 10.00 35.0 1364.71 189.44 576.46 0.99 43 215.02 7.20 21.3 1.58 1.69 2 10.00 35.0 751.86 61.10 443.42 0.99 44 216.60 4.52 21.3 1.21 1.30 2 10.00 35.0 456.82 2.89 349.15 0.99 45 217.81 7.86 21.3 3.08 3.31 1 50.00 25.0 786.17 0.00 237.06 1.02 46 220.89 2.62 21.3 3.08 3.31 1 50.00 25.0 262.11 0.00 75.44 1.02 X-S Area: 2564.55 Path Length: 182.43 X-S Weight: 307894.94 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S4-Rec-EQ.gmf Processed: 21 Jan 2026 09:29:00 DATA: Analysis 1 - Slope Stability - Case S-4 - Reclaimed Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (7 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4862.00 266.60 4862.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 140.20 4859.00 143.20 4859.00 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4857.00 140.20 4857.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 143.20 4857.00 266.60 4857.00 Profile: 5 (3 points) Material beneath: 1 - Clay 0.00 4837.10 50.00 4836.90 140.20 4836.80 Profile: 6 (2 points) Material beneath: 1 - Clay 143.20 4836.80 266.60 4836.60 Profile: 7 (2 points) Material beneath: 1 - Clay 140.20 4833.80 143.20 4833.80 Slope Surface (12 points) 0.00 4837.10 50.00 4836.90 116.70 4859.10 140.20 4859.00 143.20 4859.00 185.80 4858.90 198.10 4859.70 206.90 4861.50 212.80 4861.50 216.60 4860.60 224.60 4859.30 266.60 4859.00 Phreatic Surface (5 points) 0.00 4837.10 50.00 4836.90 140.20 4844.20 143.20 4856.80 266.60 4856.80 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4836.90 XR: 221.60 YR: 4859.79 Centre: XC: 70.69 YC: 5336.47 Radius: R: 500.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 300.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-4 - Reclaimed Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.690 Analysis Summary There were: 18883 successful analyses from a total of 20001 trial failure surfaces 1118 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.16 Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4836.92 225.02 4859.30 93.31 5183.57 350.00 2.155 <-- Critical Surface 2 45.00 4836.92 224.49 4859.32 92.88 5183.63 350.00 2.158 3 45.00 4836.92 225.55 4859.29 93.71 5183.51 350.00 2.158 4 45.53 4836.92 225.02 4859.30 93.44 5183.62 350.00 2.159 5 45.00 4836.92 223.97 4859.40 92.33 5183.70 350.00 2.160 6 45.00 4836.92 226.07 4859.29 94.11 5183.46 350.00 2.161 7 45.53 4836.92 225.55 4859.29 93.84 5183.57 350.00 2.162 8 46.05 4836.92 225.02 4859.30 93.57 5183.67 350.00 2.164 9 45.00 4836.92 226.60 4859.29 94.50 5183.40 350.00 2.165 10 45.00 4836.92 223.44 4859.49 91.78 5183.78 350.00 2.165 11 45.53 4836.92 226.07 4859.29 94.24 5183.51 350.00 2.165 12 46.05 4836.92 225.55 4859.29 93.97 5183.62 350.00 2.166 13 45.53 4836.92 223.97 4859.40 92.46 5183.76 350.00 2.166 14 45.00 4836.92 226.07 4859.29 93.33 5189.75 356.12 2.167 15 46.05 4836.92 224.49 4859.32 93.14 5183.73 350.00 2.167 16 45.53 4836.92 224.49 4859.32 93.01 5183.68 350.00 2.167 17 45.53 4836.92 226.60 4859.29 94.64 5183.46 350.00 2.169 18 46.05 4836.92 226.07 4859.29 94.37 5183.56 350.00 2.169 19 45.00 4836.92 225.55 4859.29 92.93 5189.80 356.12 2.169 20 46.05 4836.92 226.60 4859.29 94.77 5183.51 350.00 2.169 21 46.58 4836.91 225.55 4859.29 94.10 5183.67 350.00 2.170 22 46.58 4836.91 226.07 4859.29 94.50 5183.62 350.00 2.170 23 45.00 4836.92 225.02 4859.30 92.53 5189.86 356.12 2.170 24 45.00 4836.92 226.60 4859.29 93.73 5189.69 356.12 2.170 25 47.11 4836.91 225.55 4859.29 94.23 5183.72 350.00 2.170 26 45.53 4836.92 226.07 4859.29 93.46 5189.80 356.12 2.170 27 45.00 4836.92 222.92 4859.57 91.23 5183.85 350.00 2.170 28 45.53 4836.92 223.44 4859.49 91.91 5183.83 350.00 2.171 29 46.05 4836.92 223.97 4859.40 92.59 5183.81 350.00 2.172 30 46.58 4836.91 225.02 4859.30 93.70 5183.73 350.00 2.173 31 46.58 4836.91 224.49 4859.32 93.27 5183.79 350.00 2.173 32 45.00 4836.92 224.49 4859.32 92.10 5189.91 356.12 2.173 33 45.53 4836.92 226.60 4859.29 93.86 5189.75 356.12 2.174 34 46.05 4836.92 226.60 4859.29 93.99 5189.80 356.12 2.174 35 46.58 4836.91 226.60 4859.29 94.90 5183.56 350.00 2.175 36 47.11 4836.91 226.07 4859.29 94.63 5183.67 350.00 2.175 37 45.53 4836.92 225.02 4859.30 92.66 5189.91 356.12 2.176 38 46.05 4836.92 226.07 4859.29 93.59 5189.85 356.12 2.176 39 45.53 4836.92 222.92 4859.57 91.35 5183.91 350.00 2.176 40 46.05 4836.92 223.44 4859.49 92.03 5183.88 350.00 2.177 41 45.00 4836.92 222.39 4859.66 90.67 5183.93 350.00 2.177 42 47.63 4836.91 225.55 4859.29 94.36 5183.78 350.00 2.178 43 47.63 4836.91 225.02 4859.30 93.96 5183.83 350.00 2.178 44 45.53 4836.92 225.55 4859.29 93.06 5189.85 356.12 2.178 45 46.58 4836.91 223.97 4859.40 92.71 5183.86 350.00 2.178 46 46.05 4836.92 225.55 4859.29 93.19 5189.90 356.12 2.178 47 45.00 4836.92 223.97 4859.40 91.54 5189.99 356.12 2.179 48 47.11 4836.91 224.49 4859.32 93.40 5183.84 350.00 2.179 49 45.53 4836.92 224.49 4859.32 92.23 5189.97 356.12 2.179 50 46.58 4836.91 226.60 4859.29 94.12 5189.85 356.12 2.179 51 47.11 4836.91 226.60 4859.29 95.03 5183.61 350.00 2.180 52 47.63 4836.91 226.07 4859.29 94.76 5183.72 350.00 2.180 53 45.00 4836.92 226.60 4859.29 92.96 5195.98 362.24 2.181 54 46.58 4836.91 226.07 4859.29 93.72 5189.90 356.12 2.181 55 45.53 4836.92 222.39 4859.66 90.79 5183.98 350.00 2.181 56 45.00 4836.92 226.07 4859.29 92.56 5196.03 362.24 2.181 57 47.11 4836.91 225.02 4859.30 93.83 5183.78 350.00 2.182 58 46.05 4836.92 225.02 4859.30 92.79 5189.96 356.12 2.182 59 46.05 4836.92 222.92 4859.57 91.48 5183.96 350.00 2.182 60 46.58 4836.91 223.44 4859.49 92.16 5183.93 350.00 2.183 61 45.00 4836.92 223.44 4859.49 90.99 5190.06 356.12 2.183 62 47.11 4836.91 223.97 4859.40 92.84 5183.91 350.00 2.184 63 47.63 4836.91 226.60 4859.29 95.16 5183.67 350.00 2.184 64 46.58 4836.91 225.55 4859.29 93.32 5189.96 356.12 2.184 65 45.53 4836.92 223.97 4859.40 91.67 5190.04 356.12 2.184 66 45.00 4836.92 225.55 4859.29 92.15 5196.08 362.24 2.184 67 45.00 4836.92 221.34 4859.83 89.55 5184.07 350.00 2.184 68 47.11 4836.91 226.60 4859.29 94.25 5189.90 356.12 2.185 69 45.00 4836.92 221.86 4859.74 90.11 5184.00 350.00 2.185 70 48.16 4836.91 226.07 4859.29 94.89 5183.77 350.00 2.185 71 47.63 4836.91 224.49 4859.32 93.52 5183.89 350.00 2.185 72 46.05 4836.92 224.49 4859.32 92.35 5190.02 356.12 2.185 73 48.16 4836.91 225.02 4859.30 94.08 5183.88 350.00 2.186 74 46.05 4836.92 222.39 4859.66 90.92 5184.03 350.00 2.186 75 46.05 4836.92 226.60 4859.29 93.21 5196.08 362.24 2.186 76 47.11 4836.91 225.55 4859.29 93.44 5190.01 356.12 2.187 77 45.53 4836.92 226.07 4859.29 92.68 5196.08 362.24 2.187 78 48.16 4836.91 225.55 4859.29 94.49 5183.83 350.00 2.187 79 46.58 4836.91 225.02 4859.30 92.91 5190.01 356.12 2.188 80 46.58 4836.91 222.92 4859.57 91.60 5184.01 350.00 2.188 81 45.00 4836.92 225.02 4859.30 91.75 5196.14 362.24 2.188 82 45.53 4836.92 221.86 4859.74 90.24 5184.05 350.00 2.188 83 48.16 4836.91 226.60 4859.29 95.29 5183.72 350.00 2.188 84 47.11 4836.91 223.44 4859.49 92.28 5183.98 350.00 2.188 85 48.68 4836.91 226.07 4859.29 95.02 5183.83 350.00 2.189 86 45.53 4836.92 223.44 4859.49 91.11 5190.11 356.12 2.189 87 45.00 4836.92 222.92 4859.57 90.43 5190.13 356.12 2.189 88 45.53 4836.92 226.60 4859.29 93.08 5196.03 362.24 2.189 89 45.00 4836.92 220.81 4859.92 88.99 5184.14 350.00 2.189 90 47.63 4836.91 223.97 4859.40 92.97 5183.96 350.00 2.190 91 45.53 4836.92 225.55 4859.29 92.28 5196.13 362.24 2.190 92 46.05 4836.92 223.97 4859.40 91.79 5190.09 356.12 2.190 93 47.11 4836.91 226.07 4859.29 93.85 5189.95 356.12 2.191 94 47.63 4836.91 226.60 4859.29 94.37 5189.95 356.12 2.191 95 48.16 4836.91 224.49 4859.32 93.65 5183.94 350.00 2.191 96 46.58 4836.91 224.49 4859.32 92.48 5190.07 356.12 2.191 97 45.00 4836.92 224.49 4859.32 91.32 5196.19 362.24 2.192 98 46.05 4836.92 221.86 4859.74 90.36 5184.10 350.00 2.192 99 46.58 4836.91 222.39 4859.66 91.04 5184.08 350.00 2.192 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4836.92 XR: 225.02 YR: 4859.30 Centre: XC: 93.31 YC: 5183.57 Radius: R: 350.00 Generated failure surface: (20 points) 45.00 4836.92 54.58 4835.72 64.19 4834.78 73.83 4834.11 83.48 4833.71 93.14 4833.57 102.79 4833.70 112.44 4834.09 122.08 4834.75 131.69 4835.68 141.27 4836.87 150.82 4838.33 160.32 4840.04 169.78 4842.02 179.17 4844.26 188.50 4846.76 197.76 4849.52 206.93 4852.53 216.02 4855.79 225.02 4859.30 Slice Geometry and Properties - Critical Failure Surface (circle 1, 42 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 1.52 -7.1 5.00 5.04 1 50.00 25.0 174.63 95.50 38.36 1.04 2 50.00 7.59 -7.1 4.58 4.62 1 50.00 25.0 886.02 311.14 199.84 1.04 3 54.58 17.98 -5.6 4.81 4.83 1 50.00 25.0 2108.55 596.75 447.81 1.03 4 59.39 27.91 -5.6 4.81 4.83 1 50.00 25.0 3279.86 855.11 695.63 1.03 5 64.19 37.63 -4.0 4.82 4.83 1 50.00 25.0 4425.50 1093.31 930.93 1.02 6 69.01 46.97 -4.0 4.82 4.83 1 50.00 25.0 5528.26 1312.09 1162.66 1.02 7 73.83 56.08 -2.4 4.82 4.83 1 50.00 25.0 6604.95 1510.59 1379.64 1.01 8 78.65 64.80 -2.4 4.82 4.83 1 50.00 25.0 7636.55 1689.06 1595.08 1.01 9 83.48 73.26 -0.8 4.83 4.83 1 50.00 25.0 8638.38 1847.64 1793.82 1.00 10 88.31 81.35 -0.8 4.83 4.83 1 50.00 25.0 9597.54 1986.22 1992.97 1.00 11 93.14 89.13 0.8 4.83 4.83 1 50.00 25.0 10520.29 2104.67 2173.51 1.00 12 97.96 96.58 0.8 4.83 4.83 1 50.00 25.0 11405.69 2203.09 2356.46 1.00 13 102.79 81.03 2.3 3.80 3.80 1 50.00 25.0 9573.81 1791.55 2501.01 0.99 14 106.59 85.24 2.3 3.80 3.80 1 50.00 25.0 10076.10 1827.58 2632.21 0.99 15 110.39 47.77 2.3 2.05 2.05 1 50.00 25.0 5638.53 1001.74 2728.07 0.99 16 112.44 102.85 3.9 4.26 4.27 1 50.00 25.0 12077.78 2100.78 2800.33 0.99 17 116.70 131.83 3.9 5.38 5.39 1 50.00 25.0 15451.29 2672.35 2837.52 0.99 18 122.08 115.75 5.5 4.81 4.83 1 50.00 25.0 13602.89 2393.31 2780.24 0.98 19 126.88 113.43 5.5 4.81 4.83 1 50.00 25.0 13365.40 2370.98 2731.69 0.98 20 131.69 98.22 7.1 4.26 4.29 1 50.00 25.0 11605.14 2070.77 2665.71 0.98 21 135.94 95.90 7.1 4.26 4.29 1 50.00 25.0 11361.00 2021.41 2609.48 0.98 22 140.20 23.83 7.1 1.07 1.08 3 0.00 45.0 2486.60 651.48 2222.72 0.95 23 141.27 42.35 8.7 1.93 1.95 3 0.00 45.0 4537.69 1913.42 2264.87 0.94 24 143.20 82.08 8.7 3.81 3.85 2 10.00 35.0 10430.81 4652.85 2664.48 0.96 25 147.01 79.83 8.7 3.81 3.85 2 10.00 35.0 10139.69 4513.12 2590.04 0.96 26 150.82 96.08 10.3 4.75 4.83 2 10.00 35.0 12194.94 5437.03 2485.66 0.96 27 155.57 91.95 10.2 4.75 4.83 2 10.00 35.0 11659.04 5178.13 2376.20 0.96 28 160.32 87.03 11.8 4.73 4.83 2 10.00 35.0 11022.92 4899.49 2247.42 0.96 29 165.05 82.30 11.8 4.73 4.83 2 10.00 35.0 10409.50 4601.35 2121.92 0.96 30 169.78 76.79 13.4 4.70 4.83 2 10.00 35.0 9696.01 4283.28 1978.59 0.95 31 174.47 71.48 13.4 4.70 4.83 2 10.00 35.0 9007.35 3946.07 1837.49 0.95 32 179.17 47.08 15.0 3.31 3.43 2 10.00 35.0 5919.94 2588.98 1702.45 0.95 33 182.49 44.11 15.0 3.31 3.43 2 10.00 35.0 5535.09 2398.94 1591.24 0.95 34 185.80 33.99 15.0 2.70 2.80 2 10.00 35.0 4249.61 1814.07 1498.56 0.95 35 188.50 54.50 16.6 4.63 4.83 2 10.00 35.0 6762.22 2817.23 1382.43 0.95 36 193.13 49.52 16.6 4.63 4.83 2 10.00 35.0 6072.59 2402.03 1238.99 0.95 37 197.76 44.95 18.2 4.57 4.81 2 10.00 35.0 5404.37 1961.49 1106.23 0.95 38 202.33 42.37 18.1 4.57 4.81 2 10.00 35.0 4941.27 1511.57 1005.70 0.95 39 206.90 46.78 19.7 5.90 6.27 2 10.00 35.0 5267.11 1262.69 819.12 0.95 40 212.80 19.06 19.7 3.22 3.43 2 10.00 35.0 2069.32 340.26 583.65 0.95 41 216.02 10.88 21.3 2.60 2.79 2 10.00 35.0 1135.57 88.19 389.92 0.95 42 218.62 10.90 21.3 6.40 6.87 1 50.00 25.0 1089.83 0.00 148.70 0.99 X-S Area: 2610.67 Path Length: 183.50 X-S Weight: 313589.66 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S5-Rec.gmf Processed: 21 Jan 2026 09:30:33 DATA: Analysis 1 - Slope Stability - Case S-5 - Reclaimed Conditions - Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (11 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4865.00 216.90 4865.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 140.40 4861.30 143.40 4861.30 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4859.00 140.40 4859.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 143.40 4859.00 216.90 4859.00 Profile: 5 (2 points) Material beneath: 1 - Clay 0.00 4851.00 140.40 4851.00 Profile: 6 (2 points) Material beneath: 1 - Clay 143.40 4851.00 216.90 4851.00 Profile: 7 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4843.00 140.40 4843.00 Profile: 8 (2 points) Material beneath: 2 - Sand and Gravel 143.40 4843.00 216.90 4843.00 Profile: 9 (3 points) Material beneath: 1 - Clay 0.00 4838.60 50.00 4838.80 140.40 4838.90 Profile: 10 (2 points) Material beneath: 1 - Clay 143.40 4838.90 216.90 4838.90 Profile: 11 (2 points) Material beneath: 1 - Clay 140.40 4835.90 143.40 4835.90 Slope Surface (9 points) 0.00 4838.60 50.00 4838.80 116.90 4861.10 140.40 4861.30 143.40 4861.30 166.90 4862.00 176.40 4862.60 180.30 4861.90 216.90 4863.00 Phreatic Surface (5 points) 0.00 4838.60 50.00 4838.80 140.40 4846.30 143.40 4857.30 216.90 4857.30 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4838.80 XR: 171.90 YR: 4862.32 Centre: XC: 55.35 YC: 5138.75 Radius: R: 300.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-5 - Reclaimed Conditions - Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 3.079 Analysis Summary There were: 16478 successful analyses from a total of 20001 trial failure surfaces 3523 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.51 Negative normal stresses exist on the base of one or more slices; examine slice data and consult the GALENA Help utility Test Factor is less than 0.2 lower limit for one or more slices; examine slice data and consult the GALENA Help utility Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4838.78 176.37 4862.60 81.83 5009.86 175.00 2.510 <-- Critical Surface 2 45.53 4838.78 176.37 4862.60 81.96 5009.95 175.00 2.519 3 46.05 4838.78 176.37 4862.60 82.10 5010.03 175.00 2.529 4 45.00 4838.78 176.90 4862.51 82.32 5009.75 175.00 2.530 5 45.00 4838.78 174.79 4862.50 80.76 5010.09 175.00 2.536 6 45.00 4838.78 175.85 4862.57 81.47 5009.94 175.00 2.536 7 45.00 4838.78 175.32 4862.53 81.12 5010.01 175.00 2.538 8 46.58 4838.79 176.37 4862.60 82.23 5010.12 175.00 2.539 9 45.53 4838.78 176.90 4862.51 82.46 5009.84 175.00 2.540 10 45.00 4838.78 176.37 4862.60 80.85 5015.28 180.10 2.540 11 45.00 4838.78 174.27 4862.47 80.40 5010.16 175.00 2.544 12 45.53 4838.78 175.85 4862.57 81.61 5010.02 175.00 2.546 13 45.53 4838.78 174.79 4862.50 80.89 5010.17 175.00 2.547 14 45.00 4838.78 173.22 4862.40 79.69 5010.31 175.00 2.550 15 46.05 4838.78 176.90 4862.51 82.59 5009.93 175.00 2.550 16 45.53 4838.78 176.37 4862.60 80.98 5015.36 180.10 2.551 17 45.00 4838.78 173.74 4862.43 80.04 5010.23 175.00 2.552 18 45.53 4838.78 175.32 4862.53 81.25 5010.10 175.00 2.554 19 47.11 4838.79 176.37 4862.60 82.36 5010.20 175.00 2.555 20 46.05 4838.78 175.85 4862.57 81.74 5010.11 175.00 2.556 21 45.53 4838.78 173.74 4862.43 80.17 5010.32 175.00 2.557 22 45.53 4838.78 174.27 4862.47 80.53 5010.24 175.00 2.557 23 45.00 4838.78 172.16 4862.33 78.97 5010.45 175.00 2.558 24 46.05 4838.78 175.32 4862.53 81.38 5010.18 175.00 2.558 25 47.63 4838.79 176.37 4862.60 82.49 5010.28 175.00 2.559 26 46.58 4838.79 176.90 4862.51 82.73 5010.01 175.00 2.560 27 46.05 4838.78 176.37 4862.60 81.11 5015.44 180.10 2.560 28 45.53 4838.78 173.22 4862.40 79.81 5010.39 175.00 2.561 29 45.00 4838.78 171.64 4862.30 78.61 5010.52 175.00 2.561 30 45.00 4838.78 176.90 4862.51 81.35 5015.18 180.10 2.562 31 46.05 4838.78 174.79 4862.50 81.02 5010.25 175.00 2.562 32 45.00 4838.78 172.69 4862.37 79.33 5010.38 175.00 2.562 33 45.53 4838.78 172.69 4862.37 79.45 5010.46 175.00 2.563 34 46.05 4838.78 174.27 4862.47 80.66 5010.33 175.00 2.564 35 46.58 4838.79 175.85 4862.57 81.87 5010.19 175.00 2.566 36 46.05 4838.78 173.74 4862.43 80.30 5010.40 175.00 2.568 37 45.00 4838.78 174.79 4862.50 79.77 5015.49 180.10 2.568 38 45.53 4838.78 172.16 4862.33 79.09 5010.53 175.00 2.569 39 46.58 4838.79 174.27 4862.47 80.79 5010.41 175.00 2.569 40 45.00 4838.78 171.11 4862.27 78.24 5010.59 175.00 2.569 41 46.58 4838.79 175.32 4862.53 81.51 5010.26 175.00 2.570 42 47.11 4838.79 176.90 4862.51 82.86 5010.10 175.00 2.570 43 45.00 4838.78 175.32 4862.53 80.13 5015.42 180.10 2.570 44 45.00 4838.78 175.85 4862.57 80.49 5015.35 180.10 2.570 45 48.16 4838.79 176.37 4862.60 82.62 5010.37 175.00 2.571 46 45.00 4838.78 170.06 4862.20 77.52 5010.73 175.00 2.571 47 46.58 4838.79 174.79 4862.50 81.15 5010.34 175.00 2.571 48 45.53 4838.78 176.90 4862.51 81.48 5015.26 180.10 2.571 49 45.53 4838.78 171.64 4862.30 78.73 5010.60 175.00 2.571 50 46.58 4838.79 176.37 4862.60 81.24 5015.52 180.10 2.572 51 46.05 4838.78 173.22 4862.40 79.94 5010.47 175.00 2.572 52 45.53 4838.78 170.58 4862.23 78.01 5010.74 175.00 2.573 53 45.00 4838.78 169.53 4862.17 77.16 5010.80 175.00 2.573 54 45.00 4838.78 170.58 4862.23 77.88 5010.66 175.00 2.573 55 45.00 4838.78 168.48 4862.10 76.43 5010.93 175.00 2.574 56 45.00 4838.78 176.37 4862.60 79.87 5020.67 185.20 2.574 57 46.05 4838.78 172.69 4862.37 79.58 5010.54 175.00 2.575 58 45.00 4838.78 169.01 4862.13 76.79 5010.87 175.00 2.576 59 45.53 4838.78 171.11 4862.27 78.37 5010.67 175.00 2.577 60 45.00 4838.78 166.90 4862.00 75.33 5011.13 175.00 2.577 61 45.00 4838.78 167.95 4862.07 76.06 5011.00 175.00 2.578 62 45.53 4838.78 169.53 4862.17 77.28 5010.88 175.00 2.578 63 45.53 4838.78 175.85 4862.57 80.62 5015.43 180.10 2.578 64 46.58 4838.79 173.74 4862.43 80.43 5010.48 175.00 2.579 65 45.00 4838.78 174.27 4862.47 79.41 5015.56 180.10 2.579 66 47.11 4838.79 175.32 4862.53 81.64 5010.35 175.00 2.579 67 46.05 4838.78 172.16 4862.33 79.22 5010.61 175.00 2.579 68 45.00 4838.78 167.43 4862.03 75.70 5011.07 175.00 2.580 69 45.53 4838.78 170.06 4862.20 77.64 5010.81 175.00 2.580 70 47.63 4838.79 176.90 4862.51 82.99 5010.18 175.00 2.581 71 45.53 4838.78 174.79 4862.50 79.90 5015.57 180.10 2.581 72 46.05 4838.78 176.90 4862.51 81.61 5015.34 180.10 2.581 73 46.05 4838.78 170.58 4862.23 78.13 5010.82 175.00 2.581 74 47.11 4838.79 175.85 4862.57 82.00 5010.27 175.00 2.581 75 45.53 4838.78 175.32 4862.53 80.26 5015.50 180.10 2.582 76 46.05 4838.78 171.64 4862.30 78.86 5010.68 175.00 2.582 77 47.11 4838.79 174.27 4862.47 80.92 5010.49 175.00 2.582 78 47.11 4838.79 176.37 4862.60 81.36 5015.60 180.10 2.583 79 47.11 4838.79 174.79 4862.50 81.28 5010.42 175.00 2.583 80 45.53 4838.78 169.01 4862.13 76.92 5010.94 175.00 2.583 81 46.58 4838.79 173.22 4862.40 80.07 5010.55 175.00 2.583 82 45.53 4838.78 176.37 4862.60 80.00 5020.75 185.20 2.584 83 48.68 4838.79 176.37 4862.60 82.75 5010.45 175.00 2.585 84 45.00 4838.78 173.74 4862.43 79.05 5015.63 180.10 2.585 85 46.05 4838.78 171.11 4862.27 78.50 5010.75 175.00 2.585 86 46.58 4838.79 172.69 4862.37 79.71 5010.62 175.00 2.586 87 46.05 4838.78 170.06 4862.20 77.77 5010.89 175.00 2.586 88 45.00 4838.78 173.22 4862.40 78.69 5015.70 180.10 2.587 89 45.53 4838.78 168.48 4862.10 76.55 5011.01 175.00 2.587 90 45.53 4838.78 166.90 4862.00 75.45 5011.20 175.00 2.587 91 45.53 4838.78 167.95 4862.07 76.18 5011.08 175.00 2.588 92 45.53 4838.78 167.43 4862.03 75.82 5011.14 175.00 2.588 93 47.63 4838.79 175.85 4862.57 82.13 5010.36 175.00 2.589 94 46.58 4838.79 176.90 4862.51 81.74 5015.42 180.10 2.589 95 45.53 4838.78 174.27 4862.47 79.54 5015.64 180.10 2.589 96 46.05 4838.78 175.85 4862.57 80.75 5015.51 180.10 2.589 97 46.58 4838.79 172.16 4862.33 79.35 5010.69 175.00 2.590 98 47.11 4838.79 173.74 4862.43 80.56 5010.56 175.00 2.590 99 45.00 4838.78 172.69 4862.37 78.33 5015.77 180.10 2.590 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4838.78 XR: 176.37 YR: 4862.60 Centre: XC: 81.83 YC: 5009.86 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4838.78 52.08 4837.41 59.21 4836.33 66.37 4835.54 73.56 4835.06 80.77 4834.86 87.98 4834.97 95.18 4835.37 102.35 4836.07 109.49 4837.06 116.59 4838.35 123.62 4839.92 130.59 4841.79 137.47 4843.94 144.25 4846.37 150.93 4849.08 157.50 4852.07 163.93 4855.32 170.23 4858.83 176.37 4862.60 Slice Geometry and Properties - Critical Failure Surface (circle 1, 44 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.62 -11.0 2.50 2.55 1 50.00 25.0 71.03 39.26 32.90 1.06 2 47.50 1.85 -11.0 2.50 2.55 1 50.00 25.0 213.24 117.86 90.76 1.06 3 50.00 3.19 -11.0 2.08 2.12 1 50.00 25.0 369.80 168.62 185.67 1.06 4 52.08 10.51 -8.6 3.56 3.60 1 50.00 25.0 1225.08 445.69 353.20 1.04 5 55.64 16.66 -8.6 3.56 3.60 1 50.00 25.0 1948.93 633.61 560.67 1.04 6 59.21 21.35 -6.2 3.39 3.41 1 50.00 25.0 2501.17 758.82 749.71 1.03 7 62.60 29.71 -6.2 3.77 3.79 1 50.00 25.0 3448.22 1006.25 929.90 1.03 8 66.37 33.93 -3.9 3.60 3.60 1 50.00 25.0 3881.63 1098.62 1090.61 1.02 9 69.97 39.12 -3.9 3.60 3.60 1 50.00 25.0 4429.93 1220.74 1244.57 1.02 10 73.56 44.13 -1.5 3.60 3.60 1 50.00 25.0 4957.23 1326.18 1381.28 1.01 11 77.17 48.81 -1.5 3.60 3.60 1 50.00 25.0 5445.85 1415.03 1517.41 1.01 12 80.77 42.72 0.8 2.91 2.91 1 50.00 25.0 4741.63 1198.21 1623.48 1.00 13 83.69 45.42 0.8 2.91 2.91 1 50.00 25.0 5020.86 1234.45 1719.07 1.00 14 86.60 22.46 0.8 1.38 1.38 1 50.00 25.0 2479.98 597.26 1792.99 1.00 15 87.98 61.15 3.2 3.60 3.60 1 50.00 25.0 6775.96 1581.31 1866.81 0.99 16 91.58 64.74 3.2 3.60 3.60 1 50.00 25.0 7205.35 1603.38 1984.96 0.99 17 95.18 67.85 5.6 3.59 3.60 1 50.00 25.0 7579.26 1608.56 2081.06 0.99 18 98.77 70.89 5.6 3.59 3.60 1 50.00 25.0 7944.39 1597.02 2180.98 0.99 19 102.35 73.30 7.9 3.57 3.60 1 50.00 25.0 8237.88 1568.80 2257.48 0.98 20 105.92 75.77 7.9 3.57 3.60 1 50.00 25.0 8538.39 1523.63 2339.26 0.98 21 109.49 23.94 10.3 1.11 1.12 1 50.00 25.0 2701.89 464.12 2374.38 0.98 22 110.60 65.77 10.3 2.99 3.04 1 50.00 25.0 7409.83 1218.73 2403.71 0.98 23 113.59 67.13 10.3 2.99 3.04 1 50.00 25.0 7532.73 1162.82 2442.82 0.98 24 116.59 53.03 12.6 2.36 2.42 1 50.00 25.0 5936.93 875.82 2428.10 0.98 25 118.95 51.43 12.6 2.34 2.40 2 10.00 35.0 5750.92 819.36 2333.53 0.96 26 121.28 50.25 12.6 2.34 2.40 2 10.00 35.0 5602.96 769.99 2272.78 0.96 27 123.62 72.36 15.0 3.48 3.60 2 10.00 35.0 8033.07 1048.41 2165.93 0.96 28 127.10 69.21 15.0 3.48 3.60 2 10.00 35.0 7636.17 903.58 2057.00 0.96 29 130.59 72.89 17.4 3.87 4.05 2 10.00 35.0 7976.98 822.38 1911.37 0.96 30 134.46 53.58 17.4 3.01 3.16 1 50.00 25.0 5830.82 484.55 1832.33 0.99 31 137.47 49.33 19.7 2.93 3.12 1 50.00 25.0 5360.20 332.71 1713.54 1.00 32 140.40 47.31 19.7 3.00 3.19 3 0.00 45.0 4918.95 1246.76 1483.64 0.93 33 143.40 12.89 19.7 0.85 0.91 1 50.00 25.0 1532.93 627.07 1719.65 1.00 34 144.25 47.85 22.1 3.34 3.60 1 50.00 25.0 5698.87 2305.09 1623.86 1.00 35 147.59 43.65 22.1 3.34 3.60 1 50.00 25.0 5211.65 2000.43 1482.26 1.00 36 150.93 48.68 24.4 4.22 4.63 1 50.00 25.0 5833.49 2097.77 1302.55 1.01 37 155.15 23.82 24.4 2.35 2.58 2 10.00 35.0 2847.82 927.44 1115.99 0.97 38 157.50 28.60 26.8 3.22 3.60 2 10.00 35.0 3368.68 994.36 949.99 0.98 39 160.72 23.68 26.8 3.22 3.60 2 10.00 35.0 2719.73 628.79 760.66 0.98 40 163.93 17.24 29.2 2.97 3.40 2 10.00 35.0 1902.83 244.96 562.66 0.99 41 166.90 2.86 29.2 0.59 0.67 2 10.00 35.0 304.19 6.85 448.25 0.99 42 167.49 11.13 29.2 2.74 3.14 2 10.00 35.0 1151.37 0.00 361.45 0.99 43 170.23 7.79 31.5 3.07 3.60 1 50.00 25.0 778.98 0.00 216.61 1.05 44 173.30 2.60 -90.0 3.10 4860.41 1 50.00 25.0 259.66 0.00 -107.88 -5.40 X-S Area: 1721.18 Path Length: 4993.78 X-S Weight: 193317.47 GALENA 7.2 Analysis Results Version: 7.20.3.01 Licensee: J & T Consulting Project: NCCI Pit 1 File: C:\Galena Models\NCC Pitl-S5-Rec-EQ.gmf Processed: 21 Jan 2026 09:31:18 DATA: Analysis 1 - Slope Stability - Case S-5 - Reclaimed Conditions - Pseudo Static Material Properties (3 materials) Material: 1 (Mohr-Coulomb Isotropic) - Clay Cohesion Phi UnitWeight Ru Unsaturated: 50.00 25.0 100.00 Auto Saturated: 50.00 25.0 115.00 Auto Material: 2 (Mohr-Coulomb Isotropic) - Sand and Gravel Cohesion Phi UnitWeight Ru Unsaturated: 10.00 35.0 115.00 Auto Saturated: 10.00 35.0 130.00 Auto Material: 3 (Mohr-Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 45.0 100.00 Auto Saturated: 0.00 45.0 110.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 62.400 Material Profiles (11 profiles) Profile: 1 (2 points) Material beneath: 1 - Clay 0.00 4865.00 216.90 4865.00 Profile: 2 (2 points) Material beneath: 3 - Slurry Wall 140.40 4861.30 143.40 4861.30 Profile: 3 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4859.00 140.40 4859.00 Profile: 4 (2 points) Material beneath: 2 - Sand and Gravel 143.40 4859.00 216.90 4859.00 Profile: 5 (2 points) Material beneath: 1 - Clay 0.00 4851.00 140.40 4851.00 Profile: 6 (2 points) Material beneath: 1 - Clay 143.40 4851.00 216.90 4851.00 Profile: 7 (2 points) Material beneath: 2 - Sand and Gravel 0.00 4843.00 140.40 4843.00 Profile: 8 (2 points) Material beneath: 2 - Sand and Gravel 143.40 4843.00 216.90 4843.00 Profile: 9 (3 points) Material beneath: 1 - Clay 0.00 4838.60 50.00 4838.80 140.40 4838.90 Profile: 10 (2 points) Material beneath: 1 - Clay 143.40 4838.90 216.90 4838.90 Profile: 11 (2 points) Material beneath: 1 - Clay 140.40 4835.90 143.40 4835.90 Slope Surface (9 points) 0.00 4838.60 50.00 4838.80 116.90 4861.10 140.40 4861.30 143.40 4861.30 166.90 4862.00 176.40 4862.60 180.30 4861.90 216.90 4863.00 Phreatic Surface (5 points) 0.00 4838.60 50.00 4838.80 140.40 4846.30 143.40 4857.30 216.90 4857.30 Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 50.00 YL: 4838.80 XR: 171.90 YR: 4862.32 Centre: XC: 55.35 YC: 5138.75 Radius: R: 300.00 Earthquake Force Pseudo-static earthquake (seismic) coefficient: 0.072 Variable Restraints Parameter descriptor: XL XR R Range of variation: 10.00 10.00 250.00 Trial positions within range: 20 20 50 - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - RESULTS: Analysis 1 - Slope Stability - Case S-5 - Reclaimed Conditions - Pseudo Static Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Initial failure surface approximation - Factor of Safety: 2.221 Analysis Summary There were: 16478 successful analyses from a total of 20001 trial failure surfaces 3523 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.80 Negative normal stresses exist on the base of one or more slices; examine slice data and consult the GALENA Help utility Test Factor is less than 0.2 lower limit for one or more slices; examine slice data and consult the GALENA Help utility Results Summary - Lowest 99 Factor of Safety circles Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS 1 45.00 4838.78 176.37 4862.60 81.83 5009.86 175.00 1.797 <-- Critical Surface 2 45.53 4838.78 176.37 4862.60 81.96 5009.95 175.00 1.804 3 45.00 4838.78 176.90 4862.51 82.32 5009.75 175.00 1.807 4 46.05 4838.78 176.37 4862.60 82.10 5010.03 175.00 1.810 5 45.53 4838.78 176.90 4862.51 82.46 5009.84 175.00 1.813 6 45.00 4838.78 175.85 4862.57 81.47 5009.94 175.00 1.815 7 46.58 4838.79 176.37 4862.60 82.23 5010.12 175.00 1.817 8 45.00 4838.78 175.32 4862.53 81.12 5010.01 175.00 1.819 9 45.00 4838.78 174.79 4862.50 80.76 5010.09 175.00 1.819 10 45.00 4838.78 176.37 4862.60 80.85 5015.28 180.10 1.819 11 46.05 4838.78 176.90 4862.51 82.59 5009.93 175.00 1.820 12 45.53 4838.78 175.85 4862.57 81.61 5010.02 175.00 1.822 13 45.00 4838.78 174.27 4862.47 80.40 5010.16 175.00 1.826 14 46.58 4838.79 176.90 4862.51 82.73 5010.01 175.00 1.827 15 45.53 4838.78 174.79 4862.50 80.89 5010.17 175.00 1.827 16 45.53 4838.78 176.37 4862.60 80.98 5015.36 180.10 1.827 17 47.11 4838.79 176.37 4862.60 82.36 5010.20 175.00 1.828 18 46.05 4838.78 175.85 4862.57 81.74 5010.11 175.00 1.828 19 45.00 4838.78 176.90 4862.51 81.35 5015.18 180.10 1.829 20 45.53 4838.78 175.32 4862.53 81.25 5010.10 175.00 1.829 21 47.63 4838.79 176.37 4862.60 82.49 5010.28 175.00 1.830 22 46.05 4838.78 175.32 4862.53 81.38 5010.18 175.00 1.832 23 46.05 4838.78 176.37 4862.60 81.11 5015.44 180.10 1.833 24 47.11 4838.79 176.90 4862.51 82.86 5010.10 175.00 1.833 25 45.00 4838.78 173.74 4862.43 80.04 5010.23 175.00 1.834 26 45.00 4838.78 173.22 4862.40 79.69 5010.31 175.00 1.834 27 46.58 4838.79 175.85 4862.57 81.87 5010.19 175.00 1.835 28 45.53 4838.78 176.90 4862.51 81.48 5015.26 180.10 1.835 29 45.53 4838.78 174.27 4862.47 80.53 5010.24 175.00 1.836 30 46.05 4838.78 174.79 4862.50 81.02 5010.25 175.00 1.837 31 45.53 4838.78 173.74 4862.43 80.17 5010.32 175.00 1.837 32 48.16 4838.79 176.37 4862.60 82.62 5010.37 175.00 1.838 33 46.05 4838.78 174.27 4862.47 80.66 5010.33 175.00 1.840 34 45.00 4838.78 175.85 4862.57 80.49 5015.35 180.10 1.840 35 46.58 4838.79 175.32 4862.53 81.51 5010.26 175.00 1.840 36 47.63 4838.79 176.90 4862.51 82.99 5010.18 175.00 1.840 37 46.58 4838.79 176.37 4862.60 81.24 5015.52 180.10 1.840 38 45.53 4838.78 173.22 4862.40 79.81 5010.39 175.00 1.842 39 45.00 4838.78 175.32 4862.53 80.13 5015.42 180.10 1.842 40 46.05 4838.78 176.90 4862.51 81.61 5015.34 180.10 1.842 41 45.00 4838.78 174.79 4862.50 79.77 5015.49 180.10 1.842 42 46.58 4838.79 174.79 4862.50 81.15 5010.34 175.00 1.843 43 46.58 4838.79 174.27 4862.47 80.79 5010.41 175.00 1.843 44 45.00 4838.78 176.37 4862.60 79.87 5020.67 185.20 1.843 45 45.00 4838.78 172.16 4862.33 78.97 5010.45 175.00 1.844 46 46.05 4838.78 173.74 4862.43 80.30 5010.40 175.00 1.844 47 45.00 4838.78 172.69 4862.37 79.33 5010.38 175.00 1.845 48 45.53 4838.78 175.85 4862.57 80.62 5015.43 180.10 1.845 49 45.53 4838.78 172.69 4862.37 79.45 5010.46 175.00 1.845 50 47.11 4838.79 175.85 4862.57 82.00 5010.27 175.00 1.846 51 47.11 4838.79 175.32 4862.53 81.64 5010.35 175.00 1.846 52 46.58 4838.79 176.90 4862.51 81.74 5015.42 180.10 1.847 53 48.68 4838.79 176.37 4862.60 82.75 5010.45 175.00 1.848 54 45.00 4838.78 171.64 4862.30 78.61 5010.52 175.00 1.848 55 47.11 4838.79 176.37 4862.60 81.36 5015.60 180.10 1.848 56 48.16 4838.79 176.90 4862.51 83.12 5010.26 175.00 1.848 57 46.05 4838.78 173.22 4862.40 79.94 5010.47 175.00 1.849 58 45.53 4838.78 175.32 4862.53 80.26 5015.50 180.10 1.849 59 47.63 4838.79 175.85 4862.57 82.13 5010.36 175.00 1.850 60 47.11 4838.79 174.79 4862.50 81.28 5010.42 175.00 1.850 61 45.53 4838.78 176.37 4862.60 80.00 5020.75 185.20 1.851 62 45.53 4838.78 174.79 4862.50 79.90 5015.57 180.10 1.851 63 45.53 4838.78 172.16 4862.33 79.09 5010.53 175.00 1.851 64 45.00 4838.78 174.27 4862.47 79.41 5015.56 180.10 1.851 65 46.58 4838.79 173.74 4862.43 80.43 5010.48 175.00 1.852 66 47.11 4838.79 174.27 4862.47 80.92 5010.49 175.00 1.852 67 45.00 4838.78 176.90 4862.51 80.38 5020.57 185.20 1.852 68 46.05 4838.78 175.85 4862.57 80.75 5015.51 180.10 1.852 69 49.21 4838.80 176.37 4862.60 82.88 5010.53 175.00 1.853 70 46.05 4838.78 172.69 4862.37 79.58 5010.54 175.00 1.853 71 47.63 4838.79 175.32 4862.53 81.77 5010.43 175.00 1.854 72 48.68 4838.79 176.90 4862.51 83.25 5010.35 175.00 1.854 73 45.53 4838.78 171.64 4862.30 78.73 5010.60 175.00 1.855 74 47.63 4838.79 176.37 4862.60 81.49 5015.68 180.10 1.855 75 45.00 4838.78 171.11 4862.27 78.24 5010.59 175.00 1.855 76 46.05 4838.78 175.32 4862.53 80.39 5015.58 180.10 1.857 77 46.58 4838.79 173.22 4862.40 80.07 5010.55 175.00 1.857 78 48.16 4838.79 175.85 4862.57 82.26 5010.44 175.00 1.857 79 47.11 4838.79 176.90 4862.51 81.87 5015.50 180.10 1.857 80 46.05 4838.78 176.37 4862.60 80.12 5020.83 185.20 1.858 81 45.00 4838.78 173.74 4862.43 79.05 5015.63 180.10 1.858 82 47.63 4838.79 174.79 4862.50 81.41 5010.50 175.00 1.858 83 46.05 4838.78 172.16 4862.33 79.22 5010.61 175.00 1.858 84 45.53 4838.78 174.27 4862.47 79.54 5015.64 180.10 1.858 85 46.05 4838.78 174.79 4862.50 80.03 5015.65 180.10 1.859 86 47.11 4838.79 173.74 4862.43 80.56 5010.56 175.00 1.859 87 45.53 4838.78 176.90 4862.51 80.51 5020.65 185.20 1.859 88 46.58 4838.79 175.85 4862.57 80.88 5015.59 180.10 1.860 89 45.53 4838.78 170.58 4862.23 78.01 5010.74 175.00 1.860 90 45.53 4838.78 171.11 4862.27 78.37 5010.67 175.00 1.860 91 45.00 4838.78 170.06 4862.20 77.52 5010.73 175.00 1.860 92 45.00 4838.78 173.22 4862.40 78.69 5015.70 180.10 1.860 93 45.00 4838.78 170.58 4862.23 77.88 5010.66 175.00 1.860 94 49.74 4838.80 176.37 4862.60 83.00 5010.61 175.00 1.861 95 46.58 4838.79 172.69 4862.37 79.71 5010.62 175.00 1.861 96 47.63 4838.79 174.27 4862.47 81.05 5010.57 175.00 1.861 97 48.16 4838.79 175.32 4862.53 81.90 5010.51 175.00 1.861 98 49.21 4838.80 176.90 4862.51 83.38 5010.43 175.00 1.862 99 46.05 4838.78 171.64 4862.30 78.86 5010.68 175.00 1.862 Critical Failure Surface (circle 1) Intersects: XL: 45.00 YL: 4838.78 XR: 176.37 YR: 4862.60 Centre: XC: 81.83 YC: 5009.86 Radius: R: 175.00 Generated failure surface: (20 points) 45.00 4838.78 52.08 4837.41 59.21 4836.33 66.37 4835.54 73.56 4835.06 80.77 4834.86 87.98 4834.97 95.18 4835.37 102.35 4836.07 109.49 4837.06 116.59 4838.35 123.62 4839.92 130.59 4841.79 137.47 4843.94 144.25 4846.37 150.93 4849.08 157.50 4852.07 163.93 4855.32 170.23 4858.83 176.37 4862.60 Slice Geometry and Properties - Critical Failure Surface (circle 1, 44 slices) Slice X-S Base PoreWater Normal Test X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 45.00 0.62 -11.0 2.50 2.55 1 50.00 25.0 71.03 39.26 34.78 1.07 2 47.50 1.85 -11.0 2.50 2.55 1 50.00 25.0 213.24 117.86 93.03 1.07 3 50.00 3.19 -11.0 2.08 2.12 1 50.00 25.0 369.80 168.62 188.88 1.07 4 52.08 10.51 -8.6 3.56 3.60 1 50.00 25.0 1225.08 445.69 357.11 1.05 5 55.64 16.66 -8.6 3.56 3.60 1 50.00 25.0 1948.93 633.61 566.38 1.05 6 59.21 21.35 -6.2 3.39 3.41 1 50.00 25.0 2501.17 758.82 754.97 1.04 7 62.60 29.71 -6.2 3.77 3.79 1 50.00 25.0 3448.22 1006.25 936.29 1.04 8 66.37 33.93 -3.9 3.60 3.60 1 50.00 25.0 3881.63 1098.62 1095.17 1.02 9 69.97 39.12 -3.9 3.60 3.60 1 50.00 25.0 4429.93 1220.74 1249.72 1.02 10 73.56 44.13 -1.5 3.60 3.60 1 50.00 25.0 4957.23 1326.18 1383.50 1.01 11 77.17 48.81 -1.5 3.60 3.60 1 50.00 25.0 5445.85 1415.03 1519.83 1.01 12 80.77 42.72 0.8 2.91 2.91 1 50.00 25.0 4741.63 1198.21 1622.07 1.00 13 83.69 45.42 0.8 2.91 2.91 1 50.00 25.0 5020.86 1234.45 1717.57 1.00 14 86.60 22.46 0.8 1.38 1.38 1 50.00 25.0 2479.98 597.26 1791.42 1.00 15 87.98 61.15 3.2 3.60 3.60 1 50.00 25.0 6775.96 1581.31 1860.59 0.99 16 91.58 64.74 3.2 3.60 3.60 1 50.00 25.0 7205.35 1603.38 1978.29 0.99 17 95.18 67.85 5.6 3.59 3.60 1 50.00 25.0 7579.26 1608.56 2068.89 0.98 18 98.77 70.89 5.6 3.59 3.60 1 50.00 25.0 7944.39 1597.02 2168.09 0.98 19 102.35 73.30 7.9 3.57 3.60 1 50.00 25.0 8237.88 1568.80 2238.41 0.97 20 105.92 75.77 7.9 3.57 3.60 1 50.00 25.0 8538.39 1523.63 2319.28 0.97 21 109.49 23.94 10.3 1.11 1.12 1 50.00 25.0 2701.89 464.12 2348.04 0.97 22 110.60 65.77 10.3 2.99 3.04 1 50.00 25.0 7409.83 1218.73 2376.80 0.97 23 113.59 67.13 10.3 2.99 3.04 1 50.00 25.0 7532.73 1162.82 2415.18 0.97 24 116.59 53.03 12.6 2.36 2.42 1 50.00 25.0 5936.93 875.82 2394.22 0.97 25 118.95 51.43 12.6 2.34 2.40 2 10.00 35.0 5750.92 819.36 2287.80 0.94 26 121.28 50.25 12.6 2.34 2.40 2 10.00 35.0 5602.96 769.99 2227.97 0.94 27 123.62 72.36 15.0 3.48 3.60 2 10.00 35.0 8033.07 1048.41 2115.27 0.94 28 127.10 69.21 15.0 3.48 3.60 2 10.00 35.0 7636.17 903.58 2008.17 0.94 29 130.59 72.89 17.4 3.87 4.05 2 10.00 35.0 7976.98 822.38 1858.31 0.93 30 134.46 53.58 17.4 3.01 3.16 1 50.00 25.0 5830.82 484.55 1794.32 0.97 31 137.47 49.33 19.7 2.93 3.12 1 50.00 25.0 5360.20 332.71 1672.16 0.97 32 140.40 47.31 19.7 3.00 3.19 3 0.00 45.0 4918.95 1246.76 1432.10 0.89 33 143.40 12.89 19.7 0.85 0.91 1 50.00 25.0 1532.93 627.07 1692.23 0.97 34 144.25 47.85 22.1 3.34 3.60 1 50.00 25.0 5698.87 2305.09 1594.37 0.98 35 147.59 43.65 22.1 3.34 3.60 1 50.00 25.0 5211.65 2000.43 1454.31 0.98 36 150.93 48.68 24.4 4.22 4.63 1 50.00 25.0 5833.49 2097.77 1273.91 0.98 37 155.15 23.82 24.4 2.35 2.58 2 10.00 35.0 2847.82 927.44 1083.11 0.93 38 157.50 28.60 26.8 3.22 3.60 2 10.00 35.0 3368.68 994.36 917.87 0.94 39 160.72 23.68 26.8 3.22 3.60 2 10.00 35.0 2719.73 628.79 732.63 0.94 40 163.93 17.24 29.2 2.97 3.40 2 10.00 35.0 1902.83 244.96 537.08 0.94 41 166.90 2.86 29.2 0.59 0.67 2 10.00 35.0 304.19 6.85 425.34 0.94 42 167.49 11.13 29.2 2.74 3.14 2 10.00 35.0 1151.37 0.00 342.41 0.94 43 170.23 7.79 31.5 3.07 3.60 1 50.00 25.0 778.98 0.00 203.99 1.01 44 173.30 2.60 -90.0 3.10 4860.41 1 50.00 25.0 259.66 0.00 -107.70 -3.86 X-S Area: 1721.18 Path Length: 4993.78 X-S Weight: 193317.47 APPENDIX D Rim Northern Colorado Constructors, Inc.—NCCI Pit#1 J&T Consulting, Inc. Slope Stability Analysis Gee Property Fort Lupton, Weld County, Colorado Drilling Report December 1, 2020 Prepared for: The QUIKRETE Companies 5 Concourse Parkway, Suite 1900 Atlanta, GA 30328, USA Attention: Mr. Bryan Cline Mr. Eric Leigh Project No. 1518.6.2020.1 Prepared by: Erik Warm, P.G. LAPIS GLOBAL CONSULTING Lapis Global LLC Burghaldenstrasse 19, 5600 Lenzburg, Switzerland 2024 Sweet Creek Road, Bakersville, NC 28705, USA All estimates are an evaluation based on public data and data provided by the property owner.Lapis Global LLC does not guarantee overburden depth,material quality,mining depth,property control,or permit status/compliance in this report. 6- LAPIS GLOBAL CONSULTING December 1, 2020 The QUIKRETE Companies 5 Concourse Parkway, Suite 1900 Atlanta, GA 30328, USA Attn: Mr. Bryan Cline Re: 1518.6.2020.1 Gee Property Drilling Report Mr. Cline: Lapis Global has completed the Drilling Report for the exploration program that took place at the Gee Property, located in Weld County, Colorado from June 9th to 12th, 2020. Enclosed is the final report, maps showing the drilling locations, and written logs. I would like to acknowledge the assistance that Mr. Eric Leigh provided to the planning and implementation of this project. We are prepared to continue to assist you with future geology, mine planning, reserve & resource, and operation improvement projects if necessary. Please contact me if you have any questions about this report and when we can be of further assistance. Best regards, Lapis Global LLC Erik Warm, P.G. Principal Gee Property Drilling Report Lapis Global Consulting Contents List of Figures 3 Executive Summary 4 Introduction 5 Objectives 5 Description of Project Site 5 Geology 6 Previous Geological Investigations 6 Description of Drilling 8 Interpretation of Geology 10 Quantitative Yield Analysis 11 Interpretation of Quantitative Yield Analysis 13 Resource Estimate 16 Methodology 16 Resource Estimate 17 Acknowledgements 17 References 17 Appendix A: Cross-Sections Appendix B: Drill Logs Appendix C: Core Photos List of Figures Figure 1 - Project Site Location 5 Figure 2 - Project Area Site Map 6 Figure 3 -Topography and FEMA Flood Zones 7 Figure 4- Regional Geologic Map(source: US Geological Survey) 7 Figure 5 - Drillhole Location Map 8 Figure 6- Boart Longyear Sonic Drill Rig 9 Figure 7- Example of Sonic Core Bag 10 Figure 8-Geologic Cross-Sections A-A' and B-B' on the Gee Property 10 Figure 9-Scenario B Estimated Production Rates by Drillhole 13 Figure 10- Expected Total Sand Production Percentage (Concrete+ Mason Sand) 15 Figure 11-General Relationship between Exploration Information, Mineral Resources and Mineral Reserves(The SME Guide) 16 Project No. 1518.6.2020.1 3 December 1, 2020 Version No. 1.0 Gee Property Drilling Report Lapis Global Consulting Appendix A: Cross-Sections Project No. 1518.6.2020.1 19 December 1, 2020 Version No. 1.0 G-9 South '/,\ELEV: 4861 G-8 A 1 Silty Clay ELEV: 4859 G-1 / ` ELEV: 4858 G-42 A' FILL M . . . . . . rdpEC485/THICK3- _. • • • . • Illy-- TOP e�48FiHlOr. • ,�;;•• •.--• r1 u V: 4855 Gravel r 9 1r2 1cC 9%.Mod Yield B 72% ••f .L, • Lt TOP' ri.IJii I I North • I •5.••Coarse Sand ::Cr-I is' . •.14-1op EL 4851 rHICK: •1;,r:•''. '� •• 4 j"' .••!tY 1/2 Indy 17% ,7.•1.. t• I Medium Sand I �� Sandy Gravel . -1.1._ >t + •.a�-.:•.‘,;,. Mod 17e1d B:75% C;: TA EL: THICK 4 ' i4% . ..•• f• yZ ti�.`; '.:j: {op EL 1851 THICK:4 f z�'> I Coarse Sand }Q•'r• '•►'!~ve.1•�••'4 _ 1Ri b,h 17% L•'•�i�;.r �• I Coarse Sand _' �•",��• • am .•^ is 1 r 1.�1i Mod Yield B:75% ••r- .I.' Top EL 4848 THICK.4 I +,Lr.: aI.:fti l_.:';• ,•.Coosa Sand ,1, r. : I1 --slay-- 1 _ _ Medium Sand //��.� Mod map B:76% •••••"• fop EL 4840 THICK 18 R.- ,4l I I ---. op EL 4847TI{/W E 1/2 Inch:15% �..".V.,. 2 .•Sandy Gm* Wit. 't:i, • • '; '': '^-"•�^Coarse Sand Fine Sand Mod Yield8:72% L - ..• 1••.4 - '.{�.=�• I 1Q Inch sx,Mod Yield _81% ♦•s;;- _ I � '�9.•0�: Top EL:46/1 THICK:10 4. .. •ti. I .. .' :. Top EL 4845 THICKT2" -1 • .•}a%•• d• ?L.; •. ...r.....-.....`.Clay•PIasI.c •, f '♦ ••�• 1rz Inch 17% }�'':�:'' ��••S•rd I '- op EL 4844 THICK: Silty Sand ^_--- S'�R{•}�"d Mod YIadB:75% •C�'r��i� ITop EL:4838 THICK:IOI .��d�►1'+ iw cwy.Plas�t 1 � .j....� �,, ^`�. I'. I j •,�'�•;;�� Silt `---`-- `-'fop E L 4839 THICK:2 •',' '•Y • •4',.4; •• It 1/2 Inch 15%I 1 l'•�{'l i.g.N Coors•Sand 1• ` rr•rrr••r J' .• _ I Mod Yield B-81%1 ......tee.„.‘' 2 .'Top EL 4835TRICK:9 • • • Silty Clay •l • • • • • • • 4 OP EL:4838THICK7— �.... I '+' -•, • • . • • • • • 4 Silty Clay i d . •• •• r +•r .--�.�- • • • • • • , , „ . ; .,a Clay Plastic Top EL a831 THICK 8 - 9 y _ _ ._ •ra4*4rr♦ E • • • • • •• ••-.0.•.•• a•_•._: .. Shale 1 o • • • • • 4 • •• a.•..a jrop EL THICK:7 r •a a••_•a u • • • • • • ••••_•♦► ••-•• •a c bepti-3o -•+•••-a� r: •''a•;: •r• ••-•-• sMycry Interburden F _ . • ••••• • • oC48STRfCKlD yr — r 111 e • • •-•l C ••-• • • 4r ' • • • • 0 100 200 300 400 ft o I. • • • • I IN - - - a @� 1 inch=175 0 w c - G-7 2 ..1/� ELEV: 4861 G-4 - Y T G-31 '3 — ELEV: 4860 B' A' B' - C' @3 E' ul ELEV: 4858 G-44 e4 I • • • • • 45,Ity clay _____________ ELEV: /� • • • • •.• • •.• • • Silty Clay 3 B TOPEL:4es7THK�c:4 ELEV: 4857 G-2 ..0 I • • • • • 4 • • • • • op EL 4856 THICK 4 r. . . . . . op EL-4857 THICK.2 G-42 • �S, ,. . . . . . 4 Sk c,a, ELEV: 4�856 r.. E • o :r !4 :ri.•• •-1.. : •w•. +•• ••• ••• ••• ••• ••• •• ToOELT 48s4THICR T • I Sill La �' r •.•,:ip•7-• • l- ;I Top EL4854TH .3 of �4 r,t .� 1rz Inch:11% •` ►..y. oars.Sand 1l2 a1oh;5%,Mod Yield B:83% . .•' , Coarse Sand I s .....:-: .. G-43 .•r I ,r1;•1•1 Mod Yield B:79% .i 4i :. op EL.4850 THICK.6 i • :Top EL 4849 TICK:8 r'••'i�;':� 1/20. Irch:0.00,Mod Yield B:89% Fine SaM • . I .•'�... it! ')�+ ' 4;4k , 1 1 r•i_�T Medan saM op EL:4850 THICK:4IMS F' ti 12 Inch 6°h,Mod Yield B_¢2�7. •.•i,.••Soaroe Swd ''' - • t••• I 44 tit arch 11°6 a. - G- i ♦ - t .+' �. Mod Yie d e 84°b ~ pEC:4848THTC1 � t C :4.•T..• ,'Top EL:4842 THICK:15 -- ----- .ICK 2 •� .K It •• / h. I, -o ':;:+••. ' • -•• ••• 'r. ,n Gravel ••••'• •t. •:1'4,,• .•-•• • 83% * Top EL.4846 TH K. r�N•\-J� • ;PS •.{ '•�I , ••-•II • • • • I • • _ �,�. .� %• ,• •'� , ., co ` 5' •r- • • • • • rfop EL 4845 THI K:2 Al. Ar Q lir I• ..K•r+::� _ !.a••_• •d I I r Q. 1 Sandy 21 ,a• ••••�' r %J'C.C� ')•.\: . �� )T -, I Mod1Ve 8 84% 1 •\ op EL:4B39THICK:9 'ti*•..7:_j_ •11 G-39 1,2 Inch.D 00,Mod Yield B:82%._ '� Siay Sid 1 •.1% �S; M�• 1rz k1Gi 12% Gravel I r�!1.' 4.of T . ,;:i1;4 i ��. 1^ •-- 1' •'•t � Mod NUMB:83% I Top EL 4839 THIS:5— 1rz,IneN 8%.M44 YI•IQ e:49% i j.tf . oar.Sand 1 co ��4r� Mod Yield B:79% Ir.I' 4 t op EL 4840 THICK:3 I I ^•� _ _ .- co • • • • 1 Top EL 4841 THICK:1 _•..a. - I .`•) a,�_;' • 444�op EL:4833 THICK - Z •• • • .• •a-.-••-• ---tiaja i 28% I •Grml ` `•t,''1•�:�'� - • . . • • 4 -•y rr• Mod YieldB 83% -� 4 • • •-•� P S ,;� + ."lop EL:4838 THICK:1 h heft 1 ` � Li; • • • • • • •• • •• • • • • • 4 .+• .� G •�• /I -` • • 46r'•y Oak_ -• • • • • • • • • • 4 • • • • • • S�Clay r. �rxti• `] G-50 �1 • • • • • •TO0ELT783iT10Ckl10 • • • • • Silty Clay • • • • • • • • • • • y 47op EL 4833 THICK.6 ro • • • • • 1 • • • • • op EL 4830 THICK 10 • • • • • / • • • • • • y..it of Olt • • • • • • • • • • • • • • • • • Sery Clay • • • • • 4 {,.iji•. • • • • • • 1 • • • • • • • • • • *Top EL 4829 THICK • • • • • • •• m • • • • • • • •• • • • • • • • • • • 25 a• • • • •-'� _•• • a •_ • • • • ■ 4 e_• • • a•. Say Clay _ /� •o HI Y ep7r 96 _ fr.•-a • • • • • • • • •• • • •rOfEL'4829 THICK-4 1'2 •-Depth 30 yPl6sc H y i I w :4828 THICK.1 e, a1 Depth'28 A B C D N Sit O N Unless otherwise noted,the data and information used to prepare this graphic is derived from data and information provided to Lapis by the Client or publicly Drawn By:Erik Elevations:National Elev Dataset LA p 1 s available sources.Lapis makes no representations or warranties,and assumes no responsibility or liability,for the accuracy,completeness,or legal rights to use this Warm May vary from surveyed topography The Quikrete Companies, Inc. Gee and Hein Property Project: Gee Property �_ �i+ data and information.This graphic is not a land survey and should not be used as such.This graphic is not intended to be used as construction plans and should (-1ft) r0 P not be used as such.The use of this graphic or the information in it for any purpose is at the sole risk of the party using it.It is understood by consumers of ' 5 Concourse Parkway Fort Lupton, Colorado Project No.: 1518.6.2020.1 o information in this graphic that Lapis is providing advice only to the Client,and from which the Company may base business decisions.The advice provided by Lapis Checked By: Background/Imagery Data: J GLOBAL could bascauseupon the opinions and advice in assumptions, ce to differ materially from judgments those that rwill benexpressed.and Lapis makes no representations or warranties,a conditions d assumeswhich, no Google different, Google World Imagery-9/2019 Suite 1900 'C 1 S responsibility or liability for the advice provided to the Company,except that Lapis hereby acknowledges,agrees,represents and warrants that it has performed its Created on: Coordinate System:NAD83/Colorado Atlanta GA 30328 USA South-North Cross-Sections A & B ro CONSULTING NG services in a skillful and competent manner,exercising due and reasonable professional care. 2020-11-11 North(ft U5)EPSG 102663 7 7 -.Tee- . )� south C G-6 CI Northee ,..... 1.1 ELEV: 4861 G-5A - G-10 Ae B` 1 '• ;• • op ELIBBOTHICK:2 ELEV: 4859 - ELEV: 4858 G-43 G-40 . - - pv ELEV: 4857 e ELEV: 4857 G-42 ,�.�Jop EL:4858 THICK:21 •• • • •-•Top EC: T op EL:4857 THICK:3 ..........irdop �•;-- 5 THK;K:2 Sit E �J'. Y� y;• „t 1 ,,. •.,.' • —''fopEE d856-THICK3- 4 r , G-40 _ In WC ll%1 7:�•'=r,•C ,.►Sy.• ..1 I !'J,. .:- ILL Mod Ylad B:75%r •: '{v.••• COMO Sand op T s t{.� ./•?Y• ' fY,t t .• op EL 4852 THICK:5 G-43 1 1 `'r , •.•- ';, 2''•: ,L ,l2 Inch-,2% 'Y• ,�{`�,i.,.. e_M_n,Sand_ �, •i.rj•)••••• I Mod Yield B.77% Top$:48/8'J,^.'YK: • ♦;' Sand Gravel �• .�i•'•1 _„'4•'• . tli Inch dB•12% o EL. G-44 . Sly y . •.A I.: I i �.• Mod Yield B•72% .Top F♦�� •• ••: In Inch:12% '.7••��•�.• !Coarse Sand • �• 1Q Inoh 33% • =l//.`` I Mod Veld B:76% `.a r{:_r•ITop EL 4847 THICK 5 Gee/; ,.I �-10`` 1 i • • • • \l•( ♦. Come Sad t°r ..4' Mod Y1el•8:5Y% s• .t • • • • • 'urn..,.:/ ', L:4840 THICK:18 - ._•.•.r .. • • • • • 4 t,• I Gravel 1/2 Inch 19% Sin - !I •1• �,.• 1n lllldC 15% • • • • • .: 1.1�. Top EL 4844 THICK 5 •_ Mod Yeld B 72% top EL.4845 THICK'J- / G-3 7 • • ' Moo yield e:n% 6 ac • • • • • p'4L;C"!�'' a' CM v2 lrrh.23% .i',ly ' rxa_ve1_ - --_- f•l->LCf; K 1 C. THICK 1 Mod Yield B 76% .,� b 7Op EL:4840 THICK:8 •� � Sin Sane K •I •••4� _tn lnch'_22% • to yid,12% —_ _- r .» .j.5 •..• I '� cf travel ��,, r-• MOd Yield B:75% ---- op EL 4839 THICK.6 �Inch 24% Gravel - ft t)-0 Mod Yrold B'72% -r-) Top EL 4838 THICK.8 _ , - ____ r• ,f• I Mod Ylald B:77% -, __ rr:•s Top EL.4839 THICK:4 (/��•►� 12 Inch:34% :1�. _ : Cil 4837 __^-.-r.�.• Mod Yield B:76%i.'v:••'%i y orfi SaM :•1.;..••• - y �v Pit Shell eld B:59% 1837 TMK K:3 _— : e vf-1op EL:4837 THICK 3 4--, I G G-5 of GI • • • • . • • • • • • • • • • _ Silty Cloy yvvv"ToLaEL Plastic 4833 THICK:S 'q E .• • • • • • op EL 4832-THfCK.'7r • • • • • • • • • • •.• Sing Clay • • • • • • _ `-, p u p _• • • • • • • • • • • my lay a•-• • • °ToD EL 4829 THICK:10 • • • • • 1 ..�..-_.-...--� e' ti0 ♦ • • • • • • • • • ✓fop EL 4830 THICK 7 • •• • • • • • • • • • Silly CIptL - -`-•_1 �� ^•1..�� 1 C -• •• • • •• • ••• ••-•a • • ••• • • 1 ••-•♦ • F Deptt-SO- • • • • • • • • • • • • • • • • • fop EL:4827 THICK 10 • • • • • • v3i �, . •. . •.-., . . • • • • • •1 • 1 ••-., . Silty Clay Ej ••4, . •♦ i • •-• • • • •-• • •♦ • ♦•-•Top EL 4828 THICK:5 n - _ O epth 30 '—' To • • • • • • . .'-"` ,po.-� a A B C D 11. O ep•h:30 , a O C D G-50 G-39 DI �-�—� ELEV: 4859 ELEV: 4859 G-11 G-3 FILL --• LL ELEV: 4857 ELEV: 4858 Gravel ' 7 I �op�CTHR�CT o EL 4857 TF�,IC� -�- Si Cla . SIR ' •♦• a•••••••To EL.4856 THICK:3 Clay-P1isnC • •• • • • c I se / I _ /4'opEL.4856THICK:2 • • • • • • p Sandy Gravel 4' :, Ip Top EL 4856 THICK T J - Top EL'4858 THKY(:1I �"' '?''-' -.- ` I L.,' ` - -Clay-Plastic 00 l . 1- Sri •�:, v- '• . '� `lb EL'.4854 THICK 3 Y. r r: Top EL 4855THICK:1• +' ••�r• ©• I SM Coarse Sand ••- �' I La • to Inch 22% •+�. • Mednin Sand cri I 1n YrJ[0.00,Mod Yield B:82% "►t.�tL' - Medwm Sand L Mod Yield B:70% r,'n' 1Top EL 4850 THICK 6 •N.'\••y �op EL.4852 THICK 2 '•�. N o ,.•,a, , 1 cr 1-.r.° I �'G. Medium Sand ;..• mop EL.4850 THICK. r r ?�' •1:.: in lw I-. I. '..' ry $/ I ,. '�,� ,I • Fine Sand ' .c I inch t_j1. ••r:-+.!;t ,1•'Medium Sw t/ In Inch 21% Gravel 12 Inch-18% r` Sandy Gravel ___,, `c �fI TopEL 4842 THICK 8 .�•• flop EL 4836 THICK:201 - Silty Sand ,__ 3 I Mod Yietl B:82% Top .:48/2 THICK:B I Mod Yield B:70% Mod Veld B•75% I ��` r' PRI raa m I 1 c• 1•' 1/2 Inch:19% Sandy Gravel ' 4'•:Q, Mod Yield BV 75% I Top EL.4835 THICK 17 Silt I I I `�,.,��.- I 1n11%021% •Medium Sand • • • o I I Mod Yield B:70% • Top EL 4840THICKC ';�1•••• - r I Silty Clay ► •• ^ 72 inch irk Gravel—}/— �' -.a. `. . • . N 03 I Mod tYNld 8:82% Top EL 4836 THICK:8" to Inch:2t% `fop EL:4838 THCK 1'�Q�, a I ...4/-; ''� Mod mad 13:70% Clay-Plastic Z - Pk Shell - .' I .r.� / 4-?0;O, I �:'O �' _ °J `S�r'- Pk Shelly::'' � ' E:E riorm Silly claywfop EL•4833 THICK 5 .� Clay-Plastic •••• Clay-Plastic ro . • • • • • • v v v 1'op EL:4833 THICK:4 v v v". El `""fop EL.4833 THICK 3 ••'CZ _ • • • sieyClay Interburden • • •• •• • • Clay-Plastic • • • •♦.• re r • •>. • • Top EL.4830 THICK.d ",�,� ✓top EL.4830 THICK_3 • • • • •.• Shale cd Silty Clay Top EL'.4829 THICK.4 • •• •• •• ----1•p,n/13 ;;;;;•♦fop EL 4828 THICK-5- a) 0 100 200 300 400 ft v U • • • • • • Tel 30 N Dopth.30 —�— N VI G-6 1 inch=175 N O N Unless otherwise noted,the data and information used to prepare this graphic is derived from data and information provided to Lapis by the Client or publicly Drawn By:Erik Elevations:National Elev Dataset LA pis available sources.Lapis makes no representations or warranties,and assumes no responsibility or liability,for the accuracy,completeness,or legal rights to use this Warm May vary from surveyed topography The Quikrete Companies, Inc. Gee and Hein Property Project: Gee Property �_ Div data and information.This graphic is not a land survey and should not be used as such.This graphic is not intended to be used as construction plans and should (-1ft) P not be used as such.The use of this graphic or the information in it for any purpose is at the sole risk of the party using it.It is understood by consumers of ' 5 Concourse Parkway Fort Lupton, Colorado Project No.: 1518.6.2020.1 O information in this graphic that Lapis is providing advice only to the Client,and from which the Company may base business decisions.The advice provided by Lapis Checked By: Background/Imagery Data: J GLOBALcould bascauseon the opinions and ain dons,knowledge,vice ce to differ materially fromions,or ludgments those that rwill beng current expressed.a d Lapisure economic,industry and makes no representations or warranties,alnrd assumesons rch,if no Google Google World Imagery-9/2019 Suite 1900 .Qro responsibility or liability for the advice provided to the Company,except that Lapis hereby acknowledges,agrees,represents and warrants that it has performed its Created on: Coordinate System:NAD83/Colorado Atlanta GA 30328 USA South-North Cross-Sections C & D CONSULTING NG services in a skillful and competent manner,exercising due and reasonable professional care. 2020-11-11 North(ft U5)EPSG 102663 2 West E E' East G-3 FILL re G-40 ELEV: 4858 G-42 G-2 ELEV: 4857 Gravel !,. ELEV: 4856 I �"� Silty Clay IE. ELEV: 4855 �1 s . . . . . • Top EL 4856 THICKY- I Y _/'\ t-- — 1 TopEL4856THICK:2 I _____ Sandy Gravel '.wt: I1 SIN �/ I Top EL 4850 Clay. 'THICK� t f•' _ 'Top EL:4854THICK:3 I Sift Coarse Sand ••:� ;Silt 1 ;v -.'•-.,a 1 Top EL 485iTRICK 1 1/2 kch 0.00.Mod Meld�_89%- Fins San! 1/2 Inch 10% '•- -Q i Top EL:7852-7RKX-2- +}-� ITop EL 4850 THICK:4Sartoy Gravel I �+ •; vvvv" I ?: Modr1•Id6:72x . �`,( :, I Top EL:4848THIC16:8 I Medium Sand �- v clay-Plastic h 4•,:: 0%14. I r I vvyv"Top EL.4847 THICK 5 .. �•'•. A .. - - Fine Sand .J-•J r Coarse sera I� t ' •�.j 1n WO:19%_ I. Sift hI I•Q lr- '---- 8 Bt% ••• •_,.1... .TEL 4845T .•i�+ 'i I ModYeIdB:72% ', ITopEL4815THICK:3 QI _: .., Silty Sand -__ iimiimir r- .s., !�Top EL 4844 THICK:2 I a 3 1 r I Mod1Ye B.75% finch 1. Sandy Gravel '•.M•. .i,•r `•y: 44.1.. Cors•Serd • -a )a ¢ I I •Too EL 4835 THICK 17 Silt •-.4•.aA.' In Inch8%.ModYWdE:89% .,".4 t.. 1/Inch 22% ,.-r•`1,,, ' �� I • I;. I T EL 4833 THICK:17 Mod'1&d B:72% ITop EL:4838 THICK.8 %i'. r -•r•= •I i'•'' Top tnllrchl5x ;;':•1�•.,:•' ,C°°"•Sand I •.: .1 ,c�. I I t. Silty Clay . . . r Mod Yed8:81% •?_:.�'••'•1Top '[835 THICK I ••,- I -•t i,.� • • • i' rr^!7 C•.� I I +'i• Clay- Plastic E �,:i. .:' ;;': ��".� preu` a .-- Shale O a•_•...�• Pit She '••.! l,Z.: ...•...•....,°p -Amy-Plastic 11 F -• - _ _Y�To�EL:1833THICK:3 Interburden1. 3 r '••-•-•• Slily Coy •• • • • • •-•-II • • • • • • • • • Shale 0 • • Silly Clay - op EL 482'2 THICK 4 • • Silty Clay 1-• • ` • ••• • • • • op -4S'24THICK:4- U • • . . ••.Top EL 4825 THICK.10 •-• • • • — • . . . . • Top EL:4828 THICK 5 To r • • • • • , clay.Plastic • 0 100 200 300 400 ft —�op : I. :THICK 1 • • • • • • 30 o • • • • • • — v' • • • • • • Q Depth 30 1 inch=175 0 w v c lip... F G-1 G44 G-43 G 11 F' N N ELEV: 4858 ELEV: 4857 A' B' C� I ELEV: 4857 ELEV: 4857 I i Pia - '' FILL _ opt 4858TRICR-T" I r i S� • ••••. • Silty Clay I % op EL:d858THICK 2 G-42 y r, •1 op EL:485A THICK 4- / ' I FILL I E p 1r2Iralx 17%_r}w::. j�' -. Median Sand •••• • •••• I / Top EL:4852 THICK:5 ' I or .., o Moo Yeld •e:75% •?Top EL 485ITRrCR:T I I I I G-40 411111.1 . ,. . :i,;• I w 1/2 Inch V% ';..%:'•' •: Coarse Sam I 1/2ld B 11x,_: �!_v=i SO1.$DrYI to kck 12% I r Lx'%. :t Coarse Sand " l/��1C71UL 1l ui tr•',••�'r•.'To EL:4848 THICK 4 Mod Veld B.84% „'.' ;.•7. _ op EL:4848 THICK:8 �•t -'�1 `-' `ag m Moo Yield B:7S% ;;Top Ili , ..,, Mod MAI B:78% a•;'rr�f 1 '•'.�• II `� '. "••, �� . ••. �,; Top EL: THICK:5 G-44 -t3 x`'r ••' • • - •'I C�:`, 1„ 1/2 Inch 18% - Sandy Grave I G-10 •C • Y..•• •ti•�I I �I [,'1;. - i Mod Yield B 75% op EL:4836 THI K.20 IF- • m 1n Inch 17% }}�.;��'�� Coarse Sam I u2 Inch z3x [-(��'-1 �, 1/2 Inch 119E _amy Gravel 7 631a1re w Mod mod B:75% .(•K;. ti.Top EL 4838 THICK 10 I Mod Yreld B 84°'. Mod Yield B.76%I t s Top EL:4B40 THICK 8 • N ! .;, •,,,,• I op EL-4839 THICK:9I 1 3i (� G-39 to ':''1='I)y' I I I I i ' .t I I I U r C _ _ it Shell Mod Yteld 8:78%I r,••r i'•.:� Coarse Sam tt - 1 Top EL 4837 THICK 3 � z Clay-Plastic -•,• • • • - Pit Shell l�l'f') v v v v t�L:483/THICK • • • • • • Silty Clay • • • • • • �/'� -. . . . . op EL 4833 THICK 6 . . . . • G Lam) G-50 G' - �......,,.v v • • • Clay. 4833 • • • • • • • • • • opEL4833THICK:4- m • _ - - -- J • • • • • • Silly Clay m -- • • • • • Top EL:4827 THicx: O �,f_.• - I� Shea .b• • • • • *ALP 6 m op ... �' �'� Si Clay K .•-•-•--•• .8 J�`_ op EL 4828 THICK-5• @ n H' 6C�JI .:30 aftrs-• • _ .- - L.' (../ ..plh:SO Depth 30 • Mil 3 i� B C D O N Unless otherwise noted,the data and information used to prepare this graphic is derived from data and information provided to Lapis by the Client or publicly Drawn By:Erik Elevations:National Elev Dataset LA p 1 s available sources.Lapis makes no representations or warranties,and assumes no responsibility or liability,for the accuracy,completeness,or legal rights to use this Warm May vary from surveyed topography The Quikrete Companies, Inc. Gee and Hein Property Project: Gee Property �_ Div data and information.This graphic is not a land survey and should not be used as such.This graphic is not intended to be used as construction plans and should (-eft) P not be used as such.The use of this graphic or the information in it for any purpose is at the sole risk of the party using it.It is understood by consumers of ' 5 Concourse Parkway Fort Lupton, Colorado Project No.: 1518.6.2020.1 0 information in this graphic that Lapis is providing advice only to the Client,and from which the Company may base business decisions.The advice provided by Lapis Checked By: Background/Imagery Data:.177 j GLOBAL could bascauseupon the opinions and advice in assumptions, ce to differ materially from judgments those that rwill benexpressed.and Lapis makes no representations warranties,alnld assumesons which, no Google different, Google World Imagery-9/2019 Suite 1900 •0. IL S responsibility or liability for the advice provided to the Company,except that Lapis hereby acknowledges,agrees,represents and warrants that it has performed its Created on: Coordinate System:NAD83/Colorado Atlanta GA 30328 USA South-North Cross-Sections E & F CONSULTING NG services in a skillful and competent manner,exercising due and reasonable professional care. 2020-11-11 North(ft U5)EPSG 102653 , r West G •..., G-8 G-4 G-5 G-50 G East �, ` D' ELEV: 4859 ELEV: 4860 ELEV: 4859 ELEV: 4859A • A, Bi C� E' a-•-•-•--•a I Say Clay • • • • • dill,C y ., Silty Clay -•♦♦. -• I Top EL:4857 THICK:3 • • • • • • opt:1856 THICK:4 / • • • ••flop EL 4858 THICK 2 I Si - .y4.. • • • • • .-,r f ;4•t t 1 Sill TopEL:4856 THICK:4 G-42 • ,• . , E y�,� • • I .CO" ,1.•• J••~It• f'!�.., Top El_4856 THICK:1 I 1n Inch 11% ;y • N'1,': Sit .r;•y{ ••y�>> Coara•Saro ` ••I •Ij_•i' Top EL:4855THK:K:1 - G-43 •, 1 Mod Yield 8:79% '`'4•�.. op t:v, i+:-r'J .t •i. �''°' I7 A• .+ •-_ •'►► 1/2Inch.0.00.ModYieldB.82% r`.... y M•dunSand { I �_(,�l,J •s.• •r.''.}c..,. .,• •[ {. r ,,1 ••J:'••_•.. I T EL:4850 THICK:5 t LJ��S F' G-44 . IL .. 0 ti t r.r • •• h. � 121r1ch 16% .T ,i _ I A Coarse Sand -Top EL 48W THICK:Y 1/2 Matt 33% .:e.•1(ZL�"� Coarse Sand `•i'' •.,i...•11 ,. . Mod Yield B:76% `?•••,•si 1 Top EL.4840 THICK:1; Mod yield 8:59% •.. L.•'. 'Top EL 4840 THICK.18 :�,r• 1 'r7{� 1 G-10 M� 1 • • • • • • • ;` 'a■Y ` ••"l 'e , •.•: ':•' 12 Inch 17% ,'{• -.„`s . 1 Median Sara ! !1 Gee/ .• r' • •• •••••••• �74•,�r4 Mod meld B:82% '�' •.•...■,.: I Top EL 4842 THICK:B .. `7 '�;;?' _ 1.2 lady 15% Gravel '4w. ;y• e3 - .� - •r'r• ••., I Mod VIMd B:79% op EL 4840 THICK 3 �'�-4 1•••,J•• L 0 o� I I --•••••. soll „b.Y• :LPL_ --J Pit Shell i':�•: '•�.- P �,•f{�I -, Clay•Plasoc / ••••••••••• __��itS/1el_to inth 34% g' •� Grovel _ Mod r.Id B.82% Top EL 4836 THICK:6 �, lop ec 4836 THIN. • • • •7j' e• op . kY :3 4.N JJY^^ • ,__..._.._..._..____-- • • Mod Yield B 59% ��. •R Pit Shell ' G-50• • • • • G G' •••.•i • • • • • Silly I , • •.0._.!,_!.• • • • •,•_• op EL 4830 THICK 10 • • • • • • ___ " CmY-Pla•8c 7l •�zt• Silty Clay • •• • • • �lty Clay „ryl°pE(�485"lZiif � E • •.•_•• •lop EL 4830 TRfCR:T • • • •,•_• !••."•_•��op1EL 4830 THICK 7 •�.•_•.• e1 U,{L I u _•.i-• • • , a.•-•-• • L•-_>-a a. ■_e-. • a•. Sly�y 1'Ilk. � I I Li:, •• •-• • • • •a•S. •a•-•-aa •••.• • el ToptL:4830-THICk:4 @ IC?F=T `J"l'J 7.8 aCl to 30 , H • v — J�e•Ih 3B _ _ kJ To 1n-,nn i .r'rl 1 C D O 3 • ru ru H G-9 G-7 G-6 H' ELEV: 4861 ELEV: 4861 ELEV: 4861 r ' - -�-- -•-•-• •-r-'-1 s Ryck,y FILL • • .5,_. •• j say clay cn • •• I.• L•_I 1 Top EL: •4859 THICK:3 • •• • • • • Sdty Clay • • A op EL 4860 THICK2 • •• •• •• •• {lop EL.4857THICK 4 _ - Sit ( Gravel . ; 1t _ op EL 4857 THICK 3 121rch.9°l,,Mod Yiek2 B:72__%_ I••II% �I `Cowa•saro t.r':;,%i '•,,it t� ` I Sandy Gravel O '.4;:. '4.. •. Top EL 4851 THICK:8 :�o'••."'f 12 inch:11%vx,• �I M� r C ,. - Coarse Sand •.;•�4•,• ` �.� �'�l Mod Yield 8:75% r'�• '!."�TopEL:4852 THICKS 111 .� 1Coarse Sand �- . « ; .: : Ctn. ` i•P::k• i, i j3.-r..-J ' t..•• , •• 41 Medium Sand :'`; t��o I .-Q,`. '\A 1/21n&6%.Mod Yi•Id B:B2% :' %v:•+j•j Coarse Sand 'Top EL 4849 THICK 3 '-?op EL.4842 THICK.15 TA `Q ,�:.,_:�;.. .�+-.r^ I Fine Sand ' I'.V'�''7. � '•'t{J •i / ••• • • Silly Clay _ to 12Mtk15% r� Sandy Gravel ` "\ / •I •• • • • •Top EL.4844 THICK-5 I Slit Sand '-- .c Mod yield Bt 72I -PS sOr•••• Top EL 4841 THICK 10 '• `• . • • • • • y • • • • • • I ••_.• : � '` ———— I Silt ` " aY S Sand j 121nch 0.00.Mo0lleld_g Flo'EL.4841 THICK t --- -� •I Ck' •-Shed to mu,1296 :_ _ • • • c clay_ =x �'�=��_ ModYle108:75% —_-_—__-�opEL:4e39THICK 6 I Silty Clay n ✓Top EL:4839 • • • •a•- -- — • • • co .f._•-..- • ••-•-•.. Pit shed—_—_—--:::::-- • • ••-•-/ • • •••v- . ••-• Pit Shell I Clay-Plastic v Z • • •-•—.•. • •'•-••'e •S•••'•-• 8 • • • • • • • • • • Silty Clay • •-ill •Imam• . • • • • • • Say Clay • • • • • /fop EL 4831 THICK 10 • • • • • • $i Ciey• • • • •"?rop EL:483TTfirMi- • • • • • • 1 • • • • •• - Shale — Y • • • • • • • • • • • ill • • • • • • Top EL:4832 THICK:7ro El• • .. ., ' • • .. • 1 •• •• ' Interburden o Depth 30 l>n4t.30 rY v 0 100 200 300 400 ft a, 1; v a, 3 a 1 inch=175 N O N LA pis Unless otherwise noted,the data and information used to prepare this graphic is derived from data and information provided to Lapis by the Client or publicly Drawn By:Erik Elevations:National Elev Dataset J I�J'� available sources.Lapis makes no representations or warranties,and assumes no responsibility or liability,for the accuracy,completeness,or legal rights touethis Warm May vary from surveyed topography The Quikrete Companies, Inc. Gee and Hein Property Project: Gee Property _- !��" data and information.This graphic is not a land survey and should not be used as such.This graphic is not intended to be used as construction plans and should (-1ft) ro tIVVI not be used as such.The use of this graphic or the information in it for any purpose is at the sole risk of the party using it.It is understood by consumers of 5 Concourse Parkway Fort Lupton, Colorado Project No.: 1518.6.2020.1 p information in this graphic that Lapis is providing advice only to the Client,and from which the Company may base business decisions.The advice provided by Lapis Checked By: Background/Imagery Data: J GLOBALbased upon certainopinions, judgments that regarding and economic, business different, could the opinions and advice to differ materially from those wl beexpessed Lapis makes no representations or warranties,and assumes o Google World Imagery-9/2019 Suite 1900 C .Q responsibility or liability for the advice provided to the Company,except that Lapis hereby acknowledges,agrees,represents and warrants that it has performed its Created on: Coordinate System:NAD83/Colorado Atlanta GA 30328 USA So Ut h-North Cross-Sections G & H ro CONSULTING NG services in a skillful and competent manner,exercising due and reasonable professional care. 2020-11-11 North(ft US)EPSG 102653 7 7 Gee Property Drilling Report Lapis Global Consulting Appendix B: Drill Logs Project No. 1518.6.2020.1 20 December 1, 2020 Version No. 1.0 ENGINEERING&CONSUMNG Mount Sterling,KY www.groffengineering.com Client Lfp,T --4;34-4. Logged by: 6-n, Date Logged: 612-'6 '''' Hole ID: -J.- Project: {-7''-':-e_— Drilling Co.: bi"(-4- Lye&" Easting: Depth: 0 Project#: Driller: ocisr-)-14f Northing: Core Dia.: 44 i' Location: Collar Elev: Hole Angle: c 0 a) a) ..1 .c• 0,1 Depth Descriptive Log a * > 4k a E 3 1"=10' ROCK TYPE:colograin, size,texture,bedding, minerals, remarks,etc o 0 2 0i r2c if 0 c2x 6) 3; Of"1 111, kV iMf 0")1,1 e v,,,/ et,,, cif (..)-e// ),/ 0- 4.r I FT-Is 1^': 5;/4-. Drk 1,^) Sr"4_ (icy -ise• v.-- RI( 6-4d, -tv r-4,4)- c,k,..ikel;„, ' , _ (&--(7- _ 6,S-- ic> SAND ; V- Co,,,tc._ Sete', Sawt_ ',I ed- &se f, 4e. se./-"-ci ebA, Le.rt-fr —2,, . , . , ... _ /0- 21, S4/4 LY co/Kt tii,,b4-1--(-S3) 3 .... I-4-y: D4( geel- )0/4 * ))j, 4,>, ilj-/?,, ,77.,- -4,-R-)---.-1 3 1,4) Z . 3 SHA&E , Si K ,,,- L) j 9 (c.e>,,t Co*/ ?) . /r` Samples: 2.5 to 20 HA No. a Page 1 of i ,7e. D. ...• -mi \, W www.groffengineering.com . ENGINEERING&CONSULTING Mount Sterling,KY Client Lilo.r 7141. Logged by: • 6 Oil Date Logged: ClsO9// Hole ID: -7-- Project: 6ee- Drilling Co.: I 0 r"i" L'49) far Easting: Easting: Depth: 0 ?S.' Project#: Driller: %/iv,,5 Northing: Core Dia.: 41' Location: Collar Elev: Hole Angle: c (...) 1 :a , Depth Descriptive Log g .§-. 1 fi=ill i i 8 ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc co cc cc cc -. )S 2 c og . , 7 tr.' PrK if)f- btlie1.0 *. (c)i)f r (SI-) 1 , I 00 1 1' .S. '-' "C 4? S-A A 1 0 ; FT1V e, -It S;I+ - * 61111 0/VI d 7 C5 2) 2_ , C.0-6 6 .. -,4. 4/4 - 10,0 5.4,AP COvitRCE, -4r flidel-C;^e j + 5/)// ,Ail , w-e-i- 3 03) i0--'1E- 5/4-44 LAII -i-r- rival, 5AA -) Samples: C ' 2.5 to 6 6 to 23 2-4,- 275 5,44- C_SczO 6 3, Icb DTI( y-ry CI-T-"‘b1C,, 61/y- Ani ± v---f11, _ Hole No. Page of /7-e D • -mi www.groffengineering.com ENGINEERING&OONSUL7ING Mount Sterling,KY Client fps T»-t I Logged by: 6. E1I P " Date Logged: °'/aff/lv Hole ID: 2- Project: Gee. Drilling Co.: s",fi 1.6077ye.- Easting: Depth: ZS-Z 8 Project#: Driller: 11'•k r Northing: Core Dia.: q'' Location: Collar Elev: Hole Angle: c m Depth Descriptive Log a t o LL -� t CD ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc § S g 6 25-27 SA-.4 Z7-le (LAy jJrPt grey, -rlryzh c ci/y-iva43-9J -Ji• 145n,) Hole No. Page ?of C '� i :' www.groffengineering.com // ENGINEERING&CONSULTING Mount Sterling,KY Client L1i{ii'i. Logged by: v-''l!I Date Logged: °NJ1/Z? Hole ID: 3 Project: (ree- Drilling Co.: 130at r4 c"i YerA r Easting: Depth: O-32) Project#: Driller: -.t Northing: Core Dia.: y' Location: ( Id C6,Ca Collar Bev: Hole Angle: c0 $, Depth Descriptive Log a LL t f ROCK TYPE:color,grain, size,texture,bedding,minerals, remarks,etc i 3 2 O x Cg D11�S Seri- ( 15U co cc cc cc w O- 2 7- SILTY . 1./)'Y , Dix 3-Py-br...� cc �W0r /rid0-4 6V' ' \ 2, S-SJ GIM' ! Prk- orn . ÷r6,ec rPv`f,r inter}; -A44-., n+Al,d/,ic,C 0 1 1 Cw 5 6 -G VI," ' prr`tywyb� S c-/may. nr�d,)t-, 5— J G.s-(o S PY 6c4. • 5rn1- 1,-- 9N1, V-Cr- S'Ld j som c s4�.l6�,- Z .- /►-ed.. .on , *- C -.,-fi-- sclf-Pa-ice./r S 2) 3 ) \ to-4a sm--(s-3) I I Zo -23 3-- sue- (sti-) C7ty-bryl, wel, hod �,.,34 j7l r*. 3 S-- 24 sue- K SIMCE; !� 1 Samples: 6.5 to 23 Hole No. S Page i of 1 ENGINEERING&CONSUMNG Mount Sterling,KY www.groffengineering.com Client (4117- 1- -1-/ Logged by: 6; j-)4"/"" Date Logged: 66//1/4cs Hole ID: Project Gi.--.---E. Drilling Co.: Ai k et- 1-c"..)ye. Easting• Depth: Project#: Driller: Zki,"'N'J- Northing: Core Dia.: Location: tv-rtc/c.. ro Collar Bev: Hole Angle: c 0 o Depth Descriptive Log 0. * > % 1 ,4-5 1'1=10' ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc i g § 8 cc re re 0,90i d r,iii,-, 0- q sl-cry c 1...„4-3/ , ( ) Drk , -i-,-- n..,,,,,-, eY20;r-', ic.'/•,,,(') i , 1 y _-1,0 deop: c.,a,,I:5_, sp, -4')-e $,..., , .(,,, so, „_,,,,, .4, ,s-,..,,_t.. ( 2...„ / 1 to IfPS 1.1A/ -1-1"-6i", , ,,,,t 6,-)+, re0,7--4-„ Z (cfj I I.T- 17 5.11-1% C LA y . "P"-61", C°.-t li--R1-t- 51 4e, mciy.,- 5-o6--fo-,, /s,t, ) i 17-20 -IZAlif I • 5,0- /6 3AS, ,r-Qb-t- 11-erre- 5-• '4. 4r - 1-t-•b-ii S-Al,4-- L —3 cd4ier-, 1,--cd— (30 10' 17) 55b-ry CLAY: )`'l, 61,y, -1-Y1-11 1 e .. . . . .. Samples: 4 to 10 17 to 20 I HA No. '-f Page I of I ENGINEERING&03NSULTING Mount Sterling,KY www.groffengineering.com Client 1-qir Y-11 /. Logged by: ,Eiii1P14 Date Logged: C6////id Hole ID: "S- 0- Project: Cre" Drilling Co.: mv-i- 4-6'r Easting: Depth: 3 d Project#: Driller: PA%r Northing: Core Dia.: '-I' ' Location: tAird C°. 6, Collar Bev: Hole Angle: c 0 ID ID p f :a Depth Descriptive Log LE in=10, ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc 0 cc er i:c w Al .4 I , %?5) /3,t>1". a r)»i srv-y cz_/tx- pric -iy-1 - ' - i 2---""lOt Ss/vD __. ,64 r.J. , .5•erte "4.1 Scout_ 11--C r-f"C-. -k JAt -le- -,pielt-/6-4, kcII-C..t? "----1'Y 4r (*bier- -,{ 2-.) aryl, 10 - 20 SANP : V -Ca"(rt-, .5c,-t 5/111- /, .9/10, - 4 r (dlAt-r; Pr-4- 3} . _ ... ......... s 7(4-11. (S Li 3 11 2 - 34) ST t,TY C i.nr. 6-yT A, ,y, -1-,,c-4.4)e_ • Samples: . 2 to 20 20 to 23 Hole nk. Page (of ) www.groffengineering.com ENGINEERING&CONSULTING Mount Sterling,KY Client Lois %.. Logged by: G ix - Date Logged: OG//i/La Hole ID: 6 Project: bee Drilling Co.: Z4'►-sye•L+- Easting: Depth: - 3v Project#: Driller: /741^kr- Northing: Core Dia.: 4-`' Location: (&t/e/Go ( Collar Elev: Hole Angle: . Depth Descriptive Log m 1"=10' a * c�i x LL ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc : c 0 0 06/Lf ,. Pr)li Q-Z STLTY C'LAy' K Sr'Y k-,., ly- /e..0i * /y►oo7, (si) ' 1w 2- C S..TLT , °'.k .5..e y 6✓n�.- . . Cor- .cnes7/ gore_ V''a%-ram s Jr S,V- / ,o% * j, yNl L .6.1.) .. . . . .. ....... 1v . .. to ` 1 Z S STLr . - .ee d�c4 , 'k2/ S . i 'ind-, y,pvc,D-4, se-4- cc: 3_) 3 1,1) 12,S- 17,s- S7L7y GLny: Dit 12(4, t,--A-L.t_ s,,cI, /va', - .',--, ._ L t 7, ?o SAM) ; Cow►re S ncl_ .Srr - 1,'C rre Skid, S�-.t. 9r i/% y v..A._.-1-- 0020 - 2,3 54.4 , V- Cuu,rt Sh6� .Svy.e- core, Sic ,"1- ,5(Arty,,ss.54,6/er-- s 3 iW 23-IC S. GTy c L AY: 1N^-Lxvi, sue, MAY+, 2 s-3J S.ToY C im 6-4-y, h-d, y)1.y1C. Samples 5 to 10 10 to 12.5 17.5 to 23 ' HoreNO. Page 1 of www.groffengineering.com ENGINEERING&CONSULTING Mount Sterling,KY Client Lyir *.,-1-1• Logged by: 6, Date Logged: ://// 2.0 Hole ID: 7 Project: (re P Drilling Co.: /60.--+- 1-91,3Yri--- Easting: Depth: 0 - 3a Project#: Driller: Cetn\A-a- Northing: Core Dia.: Location: 1,-; (11 Co, CO Collar Bev: Hole Angle: c (.3 0 0 Depth Descriptive Log g g-3 1li=101 ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc i c i 5 ,13 0 1637 (.3 )._., 0 - sit--0-/ c int: prk -6(/), iiy .., c red-i,- ryiorf, --xvt" q -lc> Sol)41, 1/-Cor-e're S-Aci S n.-t- C-GlOrt-e-- CA(/} S,Y1-t- Sib -if& ---- I +f-- 41-t_--"-4'd S.n-cf, +4- CcAPbk1.3- ( 4" ,.....-.-.., /0 --/ci 51tA- t A i/ s-,hi- p‘)dfefr Cs: 3 j 3 (,) ig-z siLry cRA.3 : v4)1-4- Soutzi, 1/45 co-t_ I - 41,Q -cr re.- S-.74, ip.e1- (...§Li ) 'Ail, t y: o_ye d ry --r,.. )14,1c._ 3 7 I Sample: 4 to 19 19 to 20 Ho(e No.- face 1 of ENGINEERING&CONSUMING Mount Sterling,KY www.groffengineering.com Client L6,p/7-- 7 /0'i Logged by: .).-%1/ 7-3— Date Logged: ' ''1611112-c-) Hole ID: 8 Project: Cd-cee— Drilling Co.: t ) Easting: Depth: 3 Project#: Driller: "--1.... Northing: Core Dia.: Location: l'aell co. C-c.. Collar Elev: Hole Angle: 0 1 .c no Depth Descriptive Log c).- 1".1 cr ROCK TYPE:color,grain, size,texture,bedding,minerals, remarks,etc g 5 gc320 2 CI co cc cc cc m 072e.) /6c- ,\-- dni li2,) 0-2. r sip...Ty cL4"Y:c03) Dr K, brc i, iv" 14,2-, "i1,-- V-'C -t- 5-0)1 7)4 I 1-• 5-- ic) 3 4M) . C.cct ,P7.I, gag., 4-,.,,,s.,, 1 4)-2ci SAM) 5.1c1 Scr"- P"d.'-k.2 prV 7) -Iy. reidob-r ,-iii• / • c.yf .5.k.i . . . Zo- 22.4 C,(-A y . -re..,-br.., , +- _sill, L7;-51., plor6-1, mayy-/- -c.,-.--/, -61,,, c _ 7 ?,5- 914 CAZ._ ivy-he'll 1 -3 17 516.T1 cA,4Y ', 5,-4-", 4r ) , Jr/, Samples: - 2.5 to 20 . . Hole No. -' Page 1 of 1/-e- III • = www.groffengineering.com ENGINEERING&CONSULTING Mount Sterling,KY Client tAd').- ' Logged by: .L. .6-/E/Per/- Date Logged: 043/1120 Hole ID: I Project: 6—C__ Drilling Co.: 11"10Ye4" Easting: Depth: Project#: Driller: ikin‘i1/41— Northing: Core Dia.: tr` Location: Vrea COi Ce) Collar Elev: Hole Angle: ..§ . 0 Depth Descriptive Log CD 0 &LB i"?--io. 0 ,p. 0 ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc icLicTA 5ir,,,,-- or11_, Q. /IL e)-2,r aTcry CL.Ay. j)iik 4,(e),-If-Ace_ ,fv4613--„, -p'e ,, /4,04 CsO ) i) ,c1771-./& 3iiii, -1-r 51-1 - Cfr 670,,L dryt.51) Z V. 10-70 GRAvec.,ty sAlv ,o , v-ort sAcf, s,,ii-lr, 'ft)1 d Ec7Ke___co4 ,11-,) +(“0-- 1R4- — CdrAr5 ..- Snot, vrt,--fr ) 1 il kx 21-3D _cal-4,1)/ 6.uiy • Cn-ey, An.--)4c 1,70.,,d 1 Samples: 2.5 to 10 10 to 20 Hole No. 61 Page of r ENGINEERING&CONSULTING Mount Sterling,KY www.groffengineering.com Client La1,55--.7141 Logged by: 6.Qievri- Date Logged: 16/2° Hole ID: fr) Project: OQ- Drilling Co.: r-1:44 }4-' Easting: Depth: a 3O Project#: Driller: /1 >tr Northing: Core Dia.: Location: Wed c..A co Collar Elev: Hole Angle: c c.) a)Depth Descriptive Log 0. % > % 1 gn 1"=10' ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc 2 0 0 cc cc tz IL 07qC, 13 eLy i'L- 0.0 i A.--j I r 0_ 1,f-- sia; prk -br -1-r-ck,y, 4.- /-4,407-, (//1-"b")t (. 1-) I i i le') /-r-/e) gA-NP: /ned ..SorL -gl-e -)k /4-, --ity cfre., -4,-s"1-ky /(.d1 d -- 1 ir --- i (12J ))t.crf 2- 0— /C 6R1vuEL3e-yd- f.kNzr.1 Li / ) sc4.-.. v-cro &ell, t Cobbk-e-; 6_64-_3 , ),c_f6 CI.4-1/ Dik. 0,e y/ .4- s D.J., h, A 64W-FL , srn/-ikedi "r I f I„ Set, ki-cereve :17 L A Y: Pi b c y fey, -1-ychbi.e., Avec', dry _eh/cc-4-- Samples: 1.5 to 10 10 to 15 16 to 20 Hors No. Page !oft re . life mi www.groffengineering.com ENGINEERING&CONSULTING Mount Sterling,KY Client &lea- Twill. Logged by: 6)E"t-A- • Date Logged: °G////2z3. Hole ID: 1 ( Project: Gee_ Drilling Co.: go,r4 tzAttsyecie Easting: Depth: 0— Project#: Driller: Potr-DA,r- Northing: ,. Core Dia.: 9' ' Location: Wekt Co. Co Collar Elev: Hole Angle: c 0 , a_o :c op Depth Descriptive Log 0 o f g 3 1 =1 0 /6 rs.— 3e3F50... .K E5ror,grain,size,texture,bedding, minerals, remarks,etc i r5 I crcli rg 0_,2„, ..1-4...1- : _ i(L-N , -iv-- c67, --fr 1744-r/ Mdra-11- er-l'ziiik (SD -2-\— /0 1 5 Ailki /e/4(44---1.. ' 5/117-,/ 1 ,,,/u 1, V-Crx 5-,V 50%,--t_ Cite Soldi L ( I ." 4r. -r--;)--t - "rtrof 5 41, -3,0' 6d4Verk,..;-6-/-I ...„-7 `)Cs U 1 I49'04' ' 5:714- CS 0 -Nike 3 ( I I 1 r (.4) . v,3--... .7 s-- CIA Y," rex 47-, 55)i) lic.-vet, /Pico3-1-i«." , Ics* 3 0 5.7-ery t 1„.A y -6,4,x, ../Fr-N-Aloie._.,elr-7, , ......., Samples: 2 to 21.5 - . . HA No. Page of ENGINEERING&CONSULTING www.groffengineering.com Mount Sterling,KY Client Lapis-1-/rn Logged by: 6..EIVI Date Logged: 04/II/213 Hole ID: 3i Project: Gee Drilling Co.: boar+ G')I'Orre-s- Easting: Depth: 0 Project#: Driller: fi,r).i.A r Northing: Core Dia.: Location: 4,4 rd. r4f) Collar Bev: Hole Angle: ° 0:C Depth Descriptive Log 1-1 * ,). ik 1 g-3 1'1=10' ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc i S § 8 g 2 0 cc cc cc i , Pr))1/2 Q-) 1314 0-1 51:11 Di k—lot r), .covi-e 5,-I1 , ir-,e rah—,,47-014 --Al'^, 00 1 /,, 2-1 a Sid SvIel-t Cc 5,4 -ir -A.1.-e -0-txPel Mc/ iv- Sevl/- Pe--ec( (yr vik,.-e I 0'16 1) z -kAt/E :,i/1/- Ae. Sakr.f_1,--C,Crt-- S'Ici -he- E;H-- eirt..5.;3 , -ir, (41der, u—e-f- S S 1/ C- fil,c) S761.4y: -tz,01-ipmj ty,T;)--)-, iqfni, p,e,1 pls-ir, 2-- "-f. 0 - 1,c) 6-RAVE4- : 5-/n i - 'Ave I cdvi-e.._ v-crre s-,t„,1 --)y- Sj).1-Crar Sia, ti --I-r 6:1001L77, 1 - 4— 9 ..--...... "la -7, I SILTI GRAVEL , -Crni-I et Id -IY- C.)uy -6.- v--A\t ,I,..e./, vre-ircsi C / 2,/ - Z2* r s'ic-Ty CC,) .7?"-bm •-•94434-, *‘" • 7 7. C-3 0 SILTY CLAY, Cr,ry cifiA b)e., 4"/ Samples: 2 to 10 10 to 12.5 14 to 20 20 to 21 . HA No. 5 i Page. of- „._ , 1-e . ...• -mi www.groffengineering.com ENGINEERING&CONSULTING Mount Sterling,KY Client L4 pi fTyri-I. Logged by: Date Logged: 65‘/D V 20 Hole ID: S9' Project: o-ce., Drilling Co.: t r-r - civo ye' r-- Easting: Depth: Project#: Driller: ,-;"3-- Northing: Core Dia.: Location: liUrq Co CO Collar Elev: Hole Angle: c 0 0 :c Depth Descriptive Log 0 a) 1 g 5 1"111 ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc , ik i S 2 _6( 6.frcn cc icF...cc w g Darl) ('''y,-AS- 0-3' CIIL +T. 5,-) 1; /11—D (.5-- ) , --la-1 4-5- Limo, ri-ke_ -- "14__. -}c gm/ /0/ lir rrel /0 ” D(s...2"") i v ./. - ‘-6,, ,,1-,4 (C-3) Samples: ...? ( A-0 3 to 4 4to 10 '--1 , - 10 to 22 -'.76:-i:t ' . Rkit,', 5/0 5f/A , .9.41-e IP Or 5 7 _ 1 ( .13.- 17. 11--/gs- 1 gi4-4/4) 1 d/Pee4j 5rovs'e / 1,3, sok, -G, -ces- 5,4, ill'1 ffIrlidd Cll's 6::-<1 'q itlar )22- isl „ST-TY /tr 1Y ai,17.e 1,4-41,e rj -- y, o, /y)-(...J _ Ho = No. Page)of 1- (e • 11 I" www.groffengineering.com ENGINEERING&CONSULTING Mount Sterling, KY Client t 1p r /1 Logged by: 6. FI 10)53 Date Logged: C.%/d i/ C') Hole ID: 3 Project: 6-ram Drilling Co.: w I- Lvtj ye,--- Easting: Depth: Z- 3t7 Project#: Driller: al'HS- Northing: Core Dia.: Location: (Alfa CO. CO. Collar Elev: Hole Angle: t Depth Descriptive Log m R. rip. a % * c 0 J$' 5 e ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc 8 gx Ls - z 7 sic,-r y ci,,iy: Tr. 0/4, N ;.,b)c / j'ry, 4,,,_I.,3 3 rc= 27. 317 G SAY: yi pfs-k., 3. s>f, &l k 'r>, ,,,_(.,, Hofe No. Page i of2a mi www.groffengineering.com ENGINEERING&CONSULVNG Mount Sterling,KY Client 1-61el-r 447. Logged by: 6,E-I Orr- q0 Date Logged: 6 //1/14) Hole ID: Project: (--sle Drilling Co.: Cla f4-- 1446Y-em-' Easting: Depth: 0-3 0 Project#: Driller: pi,A1.4.1- Northing: Core Dia.: q'' Location: Gima co. CZ) Collar Elev: Hole Angle: Depth Descriptive Log tD 0 .le 3 1".10. 13,..5ROCK c177:t?el.or,grain, size,texture,bedding, minerals, remarks,etc 8 0-7: sl-c--7-' Pr K 1-A/ SONe"( C4#/', "1-)", (WAX', /4a04, Zw_re 2- NI sshay 6.R h,,„,,......-,.. • , k, . 0,/ ,,- i cv Lyita) v- Crft_ cnci Saw,c_ eat_ I (`-v sfici, -k-- s;/4- , r kkect Si,zr, 4, rdi,,b,,,,r; (,,e 4-- 65. 2,..) 2- 1 ) /...;.--*ii-,'S''' s)-"cr.. c,,,_ \rive I 1,,)et .5-cyfri-- (s 3_) 2_1 IL 1-- GRAVEY: — ,s')11.- it' ,,,,,,, ,..,.... u -crrt 5 A.10! -ir si)4 - t4- -2 4v ) i - 0-2..c.- Z-1-4-1' 17"-brei.) ulv- s)14, howl, rvidrri- ! 1 1 .C-3 c5--c-TX 6(.A y: 6re y, d ry, -4-gle/e ‘.,rd 3 /‘- / i Samples: 2 to 10 10 to 12.5 12.5 to 20 H.q.Nr6. , Page of www.groffengineering.com ENGINEERING&CONSULTING Mount Sterling,KY Client 1-44,0T -71-,/, Logged by: Ell-13-/- Date Logged: ow-9/2) Hole ID: 117-1 Project: 6-*e__ Drilling Co.: "'r't- ' Easting: Depth: ----4 e, Project#: Driller: V r;4.r." Northing: Core Dia.: el Location: Collar Elev: Hole Angle: , - - Depth Descriptive Log 1 g-3 1"=10 , 2 0 ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc % g 8 'di .9)4 U) CC CC CC w L . A 0- t-Iti 6-IC Sc-o-e_ 6.4-y, Dr K 6/1, +. 1Mi 1 (cc Li-tf.S •, 6144 Y a. 5 .-,-,,_ 4 )1-/ P/K k:i 9 -+- 3%0 kY cilley0 :jedcbstS_SLeld, 4r" -r),„ - v-crrs, --iv 6-,,,/ 9 fo, /-)ica--i---1-- 1 1 . ,- ii. ' ( i.v4/ .5- s.), . /./4-,, Red-he", 4., ti_4,1_, 5,161, 01,54-i---i-- 2 i 1 ihr - 11r,6 454,./47 ). (.0e.-,ee -fr 57/)1 -- erevi, ini-e,itd 5)--,o--,moiyik 3 ce70,9,-6,kee/J i .._, ic0- 1/V SAA/ i V-Cdor-re -frir C_G,4#1 --iy- / )r ,, ., 7,411 ,,,G01-9 3 ko - i e•S--2- 11 S i t k (.04/ C ekbk s--- 5- •c4 t 4k, __,..... . , Samples: I • 8.5 to 10 tl., 11.5 to 20 ek , ..1 •4:, Hole No. page/ of/ re • • -AIII IP www.groffengineering.com ENGINEERING&CONSUITING Mount Sterling, KY Client 1-019'),C 7--)i-) Logged by: .0Orn- Date Logged: 6.11°//4:7 Hole ID: Project: Gee_ Drilling Co.: gee--r* LcreA''' Easting: Depth: 0- -347 Project#: Driller: L}Af ,ki Northing: Core Dia.: 9 Location: weld co. •co Collar Elev: Hole Angle: 4. 8 :c2 01 Depth Descriptive Log • CD Z. 1* > * 01 ..j 1 oi IF CI g ip. a s' ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc § 8 _ 3(aL -1 qe.,;^ da-v.'..) (P.,c '10 6" ecz'-40 5- I FgL,L 5 1 LT : ij, K b,,, -i,- v41., ),.‘,„1, d,,y_r.,,,r.4 ._ I 1 - CLA y.' Or PC 0 r-ey Lee; -11 slit i 1 i, I, 121.m., dit„,„77.71- (51) I , (,--. I.,s- E FILL. 54/1/0: F , -1)-- f.r-c:// it- 5,4--,.,,Ti 0,1,/, cif/ 1 91-NOrre, -fr - . i V--A14 ..wc / 4sr• S 111/3 rO, Z 2 1 CP i-,i-- 6 2...) , 1 )• ,_ ,9 &R/turc, sfrvli - fi-vot 9ro, . -ayl_e_ v- cfre- si-76 -I,- 6-ckbh-f:-.. $ 5 IA 14- ic" 544 exc r-if-- /(-3 lc--__I-zr 6 Rilva: t.)11_,,,,„151,1 i ,s-e4.„,_ v-crs-e_ so,J.)--11" Ce.tb/2err; (A.-e-t(izp_q_ /-7, (-- 7 ,31 SM/P . V-crfc Cr cl, Stiv.k. (,re! S-10701, 4 -61--t -niei_s-4i, -7c, 1 SP-1/ - illz: / 20- SILTY C £-4-V Dr k s pri/i 4.6,Ve, dry Samples: 1 to 2.5 5to10 10to17.5 Hole No. Page of,, e www.groffengineering.com ENGINETWIG&CONSULTING -.. Mount Sterling,KY ., Client 1.2().e.7)-- T-yr)--1 Logged by: .t.1-`531--- Date Logged: °Pb7/-2( Hole ID: 44- , Project: -c Drilling Co.: d---- 6.-"- Easting: Depth: Project#: Driller: L2 ,nvt F Northing: Core Dia.: Location: Collar Elev: Hole Angle: c 0 Depth I Descriptive Log g ..§ 1...10. c § 0 x ROCK TYPE:color,grain, size,texture,bedding, minerals, remarks,etc § c2 rr 2 8 — , [Yu) Gei, ,-. Or)) )11,5 -(-11 5.Tur- 6,LXy,- PiK - V4, -fr, 401; fnef)‘74; q- 7 S.- St9U "„ /led;uf 41, , .o-e)--c_ rcx,itre:„ ity- 4-.6-t ,-)f, 5`,,--h;zio,I 1 ,,, v'i ' L 1-(70 .rre_ , .c/Y1--( 5,-,11- drrk-cl ,..9"),/ + Cce,vrt cox', 1,..ett---2 10.- 14' ' _cievpy alit i. 5e4it ci-- cer.,-r-t 5nad, --k.coc,,se 54 c.C -+/- 2 z • C i) ,L ler- maa---t- — 14- 20 SRAY CLAY: Pf.frc gri-y, ' 2v-.2.r cA/4- _.? ,,k,r-- ,,,,,,..,, ..-- 0. t.- , Samples: 4 to 19 , ,-- , Hole No. _ Page I of 1 • t/,‘, • mi www.groffengineering.com ENGINEERING&CONSULTING Mount Sterling,KY Client Z-4/,' .T-yrn Logged by: 6,15-741/3-- Date Logged: - 1/V1° Hole ID: Project: Gee. 6640 Drilling Co.: 13e1/4"/4- Let, Easting: Depth: 0 Project#: Driller: Northing: Core Dia.: Location: Collar Elev: Hole Angle: 0, Depth Descriptive Log 0 1..10. 0. proipiciccl.ZP&cics).151r,grain, size,texture,bedding, minerals, remarks,etc g g 8 ax ce cc ce 0-3, sJZYDrk 5(/ brm, 3. C- q LtA) • .1Pr A ,f 4f1', $ howl, e/fy-A-Ji-d- 4,o-f-.0 SILT ' 1//1'‘ prY / df/- el Pf I 140 S 0-7S- SA/VD' Meer 504 c.sov-c_, d, 7C- s;# -iy e 6)4, ( 9 e4:401D v-ef .5,7e1 Crie --------- 9;74- I 0 o-R4-14:6: S I 14- Pac --c/re 2 f* - 17.1- 70i(ec-;-1` S Cd6i9/Pr, . 3 ) 1 ''' cA" ( Z 3.5-- 26 6 LA V . 1Z44 5 re); se-vvc si) mo)r-i- SjITY CLN; ore yydn/, 1be ko%ri ( .... . Samples: 5 to 10 10 to 17.5 17.5 to 23.5 Hole No. Page of • APPENDIX E Rim Northern Colorado Constructors, Inc.—NCCI Pit#1 J&T Consulting, Inc. Slope Stability Analysis Peak Acceleration (%g) with 2% Probability of Exceedance in 50 Years USGS Map, Oct. 2002rev 125°w g5°W 50°N 120°W 115°W 110°W 105°W 100°W 50°N �ti.. N.T.-"\w- Ql _ 300 ri,,:, ..,,, 9 , \_6 r ' — 160 p — 120 45°Nill A' um _,, 0 1111114 Al 45°N �, .i ,01 I if 0 1k iiili 0 60 1k 0 .' 20t' 'TO11 . V itreP ' - Wir'- 4te-40 ) o 10„ 401.1 N o ,. 4 1 I 1 20 cA d � N ® ifil 0 O 18 00 o ° 16 \vsvN -LIM 14 N N 12 00\35°N \\I: c�0 y �, O �� M d 35° 10 ,,D \ ‘t.,_' 4 Vo 0 P k? "%p. _ 8 \ 00 -\ N' . fa 1 0 � 4 30°N ' 0 t 1 2 30°N O f 25°N 25°N 12514/ 95°W 120°W 100°W 115°W 110°W 105°W M ; , .._ NCCI PIT 1 / ...Silidl" 11%.* USGS OVERLAY . I 1 - \ _iimiptauftwitp ..44.11011111 -;' 0 447) ., • .„.,e-If . .......-.1,...,-...P...-0"- i t , I -' _ jlleVPI - - - . . , - -- , ,•• ..' I .:,..i7L4 , .. 1.. 1.111 • _.., . • '' w,_. '-`-....d.. S.....4 t 1 16r. , :6.41 I Iik,T T ''°..,.' .. "Y., ilir / 111.- ' iik .i -............ . - '"*N"',............ .._. . #00- --01, Is t. ,..;rAt - . , ._ .. .. ., • .11 rt '-----je --..r..""'", . ............ ...11. f ( IN6,-*1 Pit ed [-; 'ane- / ----...._-.2 _ -,, . _.."....: ..3- , . : 7--,..,_ . . _._ . •--'-- ' .0.0"‹.-.-7-- '",.. Nt ,t ,,, ) 0ii f , ' i 1 ...., (k, . • 1 C\ii _ /4.., i . ' 1'„:' , :4\ys\,, , )%s.,..t,.. , ,..,, ,,- . ... 1111(1 \1,..4....11111k464440 ,. , . . .... ._.. s. _ ...., 7 .N _ N......., - . ' :44\4'il‘l ''%...''''‘'..libiki*I'''''''="1'...%1‘.4%,....,„....2. .j flI • i.0,-, 41 1 'IL CI ,,,,,,/, , , • , , A e.L.Eiricl,,-_,: iCopern ..........s...k, ..-4 I , icu:: .a/' } 2/68 295 Interlocker Boulevard,Suite 300 , 1, 9 Broomfield,Colorado 80021 ,\ Tel 3O3 487 1183 ti.. wwwswca.Com ENVIRONMENTAL CONSULTANTS 2/36 Sound Science.Creative Solutions? TECHNICAL MEMORANDUM To: J. C. York J-T Consulting, Inc. 305 Denver Avenue, Suite D Fort Lupton, Colorado 80621 From: Meghan Dudley, M.A., SWCA Cultural Resources Project Manager Melanie Medeiros, M.A., RPA, SWCA Cultural Resources Principal Investigator Date: October 28, 2025 Re: Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado/SWCA Project No. 99123 J-T Consulting,Inc. (J-T Consulting), contracted SWCA Environmental Consultants(SWCA)to conduct a cultural resource review and survey to support the proposed NCCI Pit No. 1 Expansion Project (project). The project consists of the expansion of a gravel mining pit on approximately 66.7 acres of mixed use agricultural,residential, and industrial land(Parcel No. 131124003001) (hereafter referred to as the project area)north of Fort Lupton,Colorado, on private land owned by 4 Z Investments LLC (Figures 1 and 2). Development of the gravel mining pit will be subject to permitting through both Weld County and the State of Colorado Division of Reclamation,Mining, and Safety(DRMS), and as such,is subject to compliance with the 1973 Historical,Prehistorical, and Archaeological Resources Act of 1973 (Colorado Revised Statutes [CRS] 24-80-401 to 410) and would require review by the Colorado Office of Archaeology and Historic Preservation(OAHP). Separate from the state-level review and permitting by the DRMS,the project would also be permitted at a local level by Weld County per the County's land use regulations. The purpose of the review and survey is to assess the project area for the presence of archaeologically and potentially sensitive cultural areas to assist J-T Consulting(project proponent) in determining if any pre- existing cultural resource issues may impact the project and to support both county-level and state-level project permitting. This technical memorandum provides a description of the project area and land use, the methods used by SWCA cultural resources specialists to complete the review and survey, a summary of the results of the review and the survey, and recommendations as they relate to the project. PROJECT AREA AND LAND USE The project area is 2.9 miles north-northwest of Fort Lupton,Weld County, Colorado, in the northeast quadrant of Section 24 of Township (T)2 North(N),Range (R) 67 West(W), as depicted on the 1949 U.S. Geological Survey(USGS)Platteville, Colorado,7.5-minute quadrangle(see Figures 1 and 2). The parcel is irregularly shaped and is composed of fallow tilled agricultural fields on the T21 terraces of the South Platte River(Figures 3 and 4). I The T2 terrace is the second-oldest river terrace in a sequence,ranked by elevation above the current floodplain. Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado i- I -ii I-c -` • •• f r N. elt. / :1 • _ o ` \ e \ -•) ;� 485• 10 18 -�•- _ = _w - '4 :, ► a� r 1 /. . r i er te.E� :m .x f rn -, ii , ....„ -...„ ,,, •. , ,\ ..,,, ,, ....„:„ .. ,c,1 ,, ..\ 1\ .%/i4 19 l� 41 Platteville, • r -- 4e60 ------------ .O Fort Lupton \:. .....1...„.,1 ` /,�, N ._ co / r � o � it / 14 .\'''' : '�\IIN. 71 (c:i3O` ' • o o c /P.. 14 o L Salon t�krne c.90 • \d Hill 'r • . 0 ,,„11a./, ) 1 le?\;.. ' . ., j. •\ , o� o h ' of el e __l a f' [ T1 Project Area Land Ownership Weld county,co 0 1,000 2,0F0e USGS 7.5'Quadrangle: Meters O Section Private Platteville,CO,40104-87 0 250 500 T2N R67w Sections 13,24 Township/Range NAD 1983 UTM Zone 13N 4e.1281°N 104.8334°W N A Base Map ESRIArcGIS On9ne, 1:24 000 accessed October 2025 Updated:10l912925 S'1r�1I/. w Project No 99123 `J \/\�,fl'/••'�r1. Layout:99123 Overvuew_Aerial Apr,'.99123_ncclPltNo1 Expansicrl_TS ENVIRONMENTAL CONSULTANTS Figure 1. Project location. 2 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado 11 it 12 .^: 07 —. '. lit . ' L , G; 14 13 i' 't 18 O# 4 y` Z 1 al.. Platteville I Fort Lu p ton li 23 19 24 • 26 25 30 1 y n Project Area Land Ownership weld county,co 0 10(,:: FC` USGS 7.5'Quadrangle: Meters O Section Private Platteville,CO,40104-87 0 250 5oa T2N R67W Sections 13,24 NAD 1983 UTM Zone 13N Q Township/Range 46.1281°N 104.8334°W N Base Map.-ESRIArcGIS Drone, 1:24,000 accessed October 2025 Updated:10/9iow_A 92 /� �A Project No 99123 S Layout:99123_Oveniew_Aerial AprX:99123_ncciPitbo1 Eopan91IN1_TS ENVIRONMENTAL CONSULTANTS Figure 2. Aerial map of the project area and surrounding properties. 3 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado Via{ i, • r '9'" k- '? 3 '. 4;,," 4 '+v"�:' , y _ti., Z ' ;4 �' t '• s,+ ' > kits a<. t '�'w:-°ry „, '•'1� ,+ -ks::4 < Figure 3. Overview of the project area from the northwest corner; view facing southeast. Photograph by SWCA(S. Little)on August 5, 2025. „f '"":,:',''''',::.C. yb '�'� p �` i •F�V r $f EX . ' r • , if M&.5 1��5't.�yy e ,�� L 6 .#f+" ,' p F@"+}fir; + 16.3 W�. �F' A ''Figure c F,kn -. rr �n , _.. l�i " i •e'C".z-�' i a ` 'w.£ °,.4 ,�i: Figure 4. Overview of the project area from northeast corner; view facing west. Photograph by SWCA(S. Little)on August 5, 2025. 4 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado The Meadow Island Ditch Number 1, a historic-era irrigation ditch,crosses the northeastern portion of the project.At least two other minor irrigation canals are also present in the project area to irrigate the fields. A house is present in the northeast portion of the project area and gas infrastructure is present in the western portion of the project area. A graded and improved road,roughly oriented east-west, is present in the central portion of the project area. An unnamed creek cuts through the northwestern portion of the project area. The east boundary of the project area is Weld County Road 25, and the south and west are bounded by graded roads associated with gravel mining and nearby industrial development. The project area is within the Flat to Rolling Plains Level IV ecoregion of the larger High Plains Level III ecoregion. The High Plains Level III ecoregion is a region of smooth to slightly irregular plains with a high percentage of cropland;natural vegetation in this Level III ecoregion is largely grama-buffalo grass (Chapman et al. 2006). Within the High Plains,the Flat to Rolling Plains Level IV ecoregion consists of more level and a less dissected landscape than the adjacent ecoregions and silty soils with a veneer of loess. Dryland farming— of primarily winter wheat and forage crops to a lesser extent—is widespread in this ecoregion,with some areas of irrigated cropland(Chapman et al. 2006). The project area is within the Platte River Basin,which is fed by the north-and west-flowing South Platte River 0.4 mile to the east of the project area(National Resource Conservation Service [NRCS] 2025). The underlying geology of the project area consists of modern alluvium, including Piney Creek Alluvium and younger deposits(Tweto 1979). Locally, one of highest terraces in the Platte River system is termed "T3"by geomorphologists because it is the third terrace above the modern level of the river. Much of this landscape has been flattened by historic agricultural activities. Although soil series are mapped at too small a scale for fine-grained detail at archaeological sites, information from soil series can inform the nature of soil deposition and development; depth of those deposits; and,by extension,the potential for archaeological deposits. According to the NRCS (2025), there are two soils mapped within the project area: an Altvan loam, 0 to 1 percent slopes, as well as aquolls and aquents gravelly substratum(Figure 5; Table 1).Although 59.2%of the project area is mapped as aquolls and aquents (a gravelly substratum with low potential for buried archaeological deposits), an Altvan soil series is formed from alluvium with weakly developed soil horizons and moderate depth with the presence of an Ap horizon(National Soil Survey 2005).As a result, it has low to moderate potential for buried deposits beneath the plow zone within the northeastern portion of the project area. 5 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado Table 1. Summary of Project Area Soil Units Soil Map Unit Parent Landforms Typical Profile Horizons Percentage Buried Material of Soil Archaeological Mapped for Potential Project Area Altvan loam,0 to 1 Alluvium Uplands, Ap(0-15 centimeters[cm]): 7.5% Low to Moderate percent slopes hillslopes,and Grayish brown loam,weak valley terraces fine granular structure, many fine pebbles,abrupt smooth boundary A(15-20 cm):Grayish brown loam,weak medium subangular blocky structure, many fine pebbles,abrupt smooth boundary BA(20-30 cm):Brown loam, weak medium subangular blocky structure,clear smooth boundary Bt(30-58 cm):Brown clay loam,weak coarse prismatic structure parting to moderate to fine and medium subangular blocky,clear smooth boundary Bk(58-66 cm):Very pale brown loam,weak medium and coarse subangular blocky structure,clear smooth boundary C(66-89 cm):Very pale brown loam,massive, gradual wavy boundary 2C(89-152 cm): Pale brown gravelly sand,single grain Aquolls,gravelly Alluvium Swales,flood H1 (0-122 cm):Loam 59.2% Low substratum plains,and H2(122-152 cm):Gravelly streams sand Aquents,gravelly Alluvium Stream terraces H1 (0-122 cm):Variable 59.2% Low substratum H2(122-152 cm):Very gravelly sand 6 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado Ole x!F. j . 4 . 4:A i vir 0, .talMiUP • • • iikt AIM • • 4 Project Area Weld County,CO 0 160 32Feet U&G3 7.5'Quadrangle: ®Meters NRCS Soil Units T2N Platteville,sgtons11324 0 ao E0 NAD 1983 UTM Zone 13N Altvan loam, 0 to 1 percent slopes 46.1281°N104.8334°W N Aquolls and Aquents, gravelly substratum A Base Map:ESRIArcGIS Orr+ne, 1:4,000 accessed October 2025 Updated.1 0/912 9 2 5 SW CA Project No 99123 Layout:99123 NRCS Apex.99123_ncoPitNo1 EXpsr efl_TS ENVIRONMENTAL CONSULTANTS Figure 5. NRCS soil units within the project area. 7 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado METHODS In June 2025 and prior to fieldwork, SWCA requested a file search and literature review for the project area through the Colorado Office of Archaeology and Historic Preservation(OAHP)to identify records for all previously conducted cultural resource surveys and all previously identified cultural resources within the project area and the Public Land Survey System(PLSS) sections within 1 mile of the project area. In addition, SWCA conducted background research,which included examination of historical topographic maps, aerial imagery, and geological and soils data for the project area to identify land use patterns and natural features that may signify areas with the potential for archaeological or cultural resources. Following completion of this background research, on August 5, 2025, SWCA archaeologists Meghan Dudley and Spencer Little completed a survey of the project area following OAHP guidelines(OAHP 2007)to identify cultural resources and potential impacts the project may have on those resources. Additionally, linear resources were recorded following Horn and Norton(2021). SWCA excavated three shovel tests (ST1—ST3)to evaluate the subsurface depositional setting and assess the project area for the potential to contain buried cultural material. Documented cultural resources were evaluated for significance according to the State Register of Historic Properties (SRHP) criteria and evaluated for their eligibility to the SRHP(OAHP 2005). RESULTS File Search and Literature Review The results of the file search and literature review indicate that there have been three previous surveys conducted in the PLSS sections within 1 mile of the project area(Table 2). One of these, a Class III Inventory for a pipeline expansion project(Gantt et al. 2009), overlaps roughly 14 acres of the northern portion of the project area. The remaining surveys include a second pipeline expansion survey(Turner et al. 2008), south of the project area, and a farm and ranch inventory for Weld and Broomfield Counties (Mehls and Mehls 1989). Table 2. Previous Inventories in the Public Land Survey System Sections within 1 Mile of the Project Area OAHP ID Year Title Author Contractor "MC.AE.R24 2009 Suncor Energy(USA)Pipeline Company Rocky Gantt, Erik,Stephan R. Centennial Mountain Crude System Expansion Pipeline Anderson,and Kristin Archaeology Project:Class III Cultural Resource Inventory A.Gensmer Laramie County,Wyoming and Weld and Adams Counties,Colorado MC.CPO.R27 1989 Survey Report,Weld County,Colorado Farm and Mehls,Steven F.,and Western Ranch Inventory,Weld and Broomfield Counties Carol Drake Mehls Historical Studies, Inc. MC.E.R85 2008 Colorado Interstate Gas Company's Proposed Turner,Randall,Kelly Metcalf High Plains Gas Pipeline Expansion Project:An Pool,Tracy Bott, Archaeological Intensive Cultural Resource Inventory in Adams, Corrine Camuso,Noah Consultants Morgan,and Weld Counties,Colorado Oliver,Kae McDonald, John Scott,Stephanie Slaughter,and Holly Smith *Previous inventory overlaps the project area. 8 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado As a result of these previous surveys, 10 resources have been recorded in the PLSS sections within 1 mile of the project area(Table 3). Of the 10 resources identified,the precontact resources consist of a precontact open camp with unknown association(5WL194),which was recorded in 1943 and is unassessed for NRHP eligibility, and a precontact burial(5WL5995) across the river from the project area,which was recorded in 2008 and needs data to make an NRHP eligibility assessment. The historic-era resources include one site marker(5WL816), one railroad grade of the Vollmar-Denver Larmie&NW railroad(5WL1018), one unnamed farm complex(5WL1412), one water control system (5WL1526), segments of three ditches (5WL2188.8, 5WL2652.9,and 5WL6107.1), and one bridge (5WL3051). Of these,three are identified as supporting segments of an NRHP-eligible resource(i.e., 5WL1526, 5WL2188.8, and 5WL2652.9). Only one of the 10 resources identified in the file search is within the project area itself: 5WL6107.1, a segment of a historic-era unnamed ditch. The overall ditch requires more data before an NRHP eligibility assessment can be made,but this recorded segment is a non-supporting segment. The remaining nine resources consist of two precontact resources and seven historic-era resources. Table 3. Previously Recorded Cultural Resources in the Public Land Survey System Sections within 1 Mile of the Project Area Site No. Site Name Temporal Site Description National Register of Historic Affiliation Places Eligibility 5WL194 — Precontact Open camp Unassessed 5WL816 Ft.Jackson Site,Sarpys Fort Historic Marker Recommended not eligible (1837) 5WL1018 Vollmar-Denver Laramie&NW Historic Railroad grade Recommended not eligible 5WL1412 — Historic Farm complex Recommended not eligible 5WL1526 South Platte Supply Canal, Historic Water control system Contributing to an NRHP-eligible Coalridge Ditch district 5WL2188.8 Platte Valley Canal,Evans No. Historic Ditch segment Eligible,supporting segment 2 Ditch 5WL2652.9 Lupton Bottom Ditch Historic Ditch segment Eligible,supporting segment 5WL3051 Sullivan Ditch Bridge, Historic Bridge Recommended not eligible WEL025.0-018.OA 5WL5995 — Precontact Burial Recommended needs data *5WL6107.1 — Historic Ditch segment Recommended needs data;non- supporting segment *Site is within the project area. General Area History Weld County was first established in 1861 under the Territory of Colorado(Weld County 2023a). A majority of the county came to be settled by people of German descent who migrated from Russia in the early 1900s. These immigrants largely first worked on the railroad and in the sugar beet fields. The sugar beet industry began in 1902 with the establishment of sugar factories in Greeley and Eaton and later in Windsor,Fort Lupton, and Johnstown.Weld County is currently the leading area for agricultural products in the state of Colorado and ninth in the United States; it is also the number-one-ranked county in the state of Colorado for cattle, grain, and sugar beet production(Weld County 2023a). 9 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado Fort Lupton, Colorado,began as a fur trading post in 1836,but the decline of the fur trade caused the fort to be abandoned in the 1840s. The Colorado gold rush,beginning in 1859,brought settlers to the South Platte River Valley. In 1879,William G. Winbourn persuaded railroad representatives to extend a sidetrack to his land,which included old Fort Lupton. In 1881, W.G. Winbourn established the town of Fort Lupton by the railroad sidetrack 1 mile south of the original fort,which was recognized in 1908 as an agricultural community(Lynch 2011). Fort Lupton has historically relied on processing and shipping produce via the nearby railroad. However,today most residents are employed by the retail trade; construction;health care and social assistance; and mining, quarrying, and oil and gas extraction (DataUSA 2025). The project parcel(Parcel No. 131124003001)is zoned as agricultural and owned by 4 Z Investments LLP. In 2023,4 Z Investments LLP acquired the property from the Gee family,who had acquired the property in 1987, according to Weld County Clerk and Recorder records online(Weld County 2023b). A general search on Ancestry.com and other websites did not find significant information pertaining to members of the Gee family(particularly William E. Gee and Jacqueline V. Gee). General Land Office Land Patent Search A General Land Office(GLO)patent search was conducted through the Bureau of Land Management (BLM) land patent database for Section 24 of T2N,R67W(BLM 2025). A single patent was issued for the land in the project area on July 1, 1868,to George Riley under the Land Act of 1820(also referred to as the Sale-Cash Entry).Nothing identified during the review of historic-era maps and aerial imagery or during the survey can be clearly associated with this land patent. Historical Map and Aerial Images Review SWCA also reviewed historical maps and historical and modern aerial imagery for features that may be present within the project area. Sources reviewed include the 1863 GLO plat map for T2N,R67W(BLM 2025),USGS quadrangles(Table 4) (USGS 2025), and historical and modern aerial imagery (NETROnline 2025). The 1863 GLO plat for T2N,R67W does not depict any potential cultural resources in the mid-nineteenth century(BLM 2025). The only natural feature mapped is the South Platte River. The river's channel, instead of being east of the project area, is depicted as flowing roughly south-north through the project area. By the start of the twentieth century,the South Platte River channel is mapped in its current alignment and there had been some modest changes to the project area since the nineteenth century(USGS 1902). The unnamed ditch, 5WL6107.1, crosses the project area from the southeast to the northwest in its current alignment. There is also a road depicted crossing the northwestern portion of the project area. However, the land within and around the project area remained largely undeveloped. By the mid-twentieth century (USGS 1949, 1954),the project area was still largely undeveloped although 5WL6107.1 was present and mapped in its current alignment. On the 1949 Platteville 1:24,000-scale quadrangle,the landscape surrounding the project area had experienced some modest development,with a two-track road bordering the project area to the west and south, as well as a second two-track road entering the section outside of the southeastern edge of the project area from the section boundary. These two-track roads give access to several structures,which are all mapped outside the project area. Weld County Road 25 is also visible as a paved road at the eastern boundary of the project area. There is also a cluster of three structures in the southwestern corner of Section 19, T2N,R66W outside the project area, as well as two more north and outside of the project area in Section 13, T2N,R67W.No new cultural resources were built in the project area during the mid-twentieth century. 10 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado Table 4. Quadrangles Reviewed for Section 24 NE'/<,T2N, R67W,Weld County, Colorado Quadrangle Scale Year Features Greeley 1:125,000 1902(surveyed At the time this map was made,the South Platte River channel is mapped in in 1900) its current alignment,east and outside of the project area. Within the project area,5WL6107.1 is mapped in its current alignment from the southeast to the northwest. Within the northwestern portion of the project area,a road is depicted running from the southwest to the northeast. Platteville 1:24,000 1949(aerial 5WL6107.1 is still mapped as crossing the project area from the southeast to photograph in the northwest.No other cultural resources are mapped at this time within the 1948,survey in project area. 1949) On the border of the project area,a two-track road follows the edge of the project area on the western and southern borders.Outside the project area along this two-track road,there are three structures mapped in the southeastern corner of the southeastern quarter of the section. A second two-track road enters the quarter in the southeastern portion of the project area and ends at a structure mapped outside of the project area. A paved road(Weld County Road 25)is mapped at the section boundaries for the eastern boundary of Section 24 and the western boundary of Section 19,T2N,R66W. In the southwestern corner of Section 18,T2N, R66W,there are three structures at the end of a two-track road to the northeast and outside of the project area. In the southeastern corner of Section 13,T2N,R67W,two buildings are mapped north of the project area,where a pond is now located. Greeley 1:250,000 1954(aerial This map is too small of a scale to depict cultural resources in the project photograph area. 1951,field checked in 1954) Available aerial imagery covering the project area dates between 1948 and 2021 (NETROnline 2025), with historical aerial photographs from 1948, 1949, 1956, 1970, and 1978. The earliest historical aerial photographs (i.e., 1948 and onward) show the unnamed ditch(5WL6107.1)crossing the project area in its current alignment, surrounded by agricultural fields, as well as the two-track road to the west and south. There is also a dirt road that can be observed crossing the project area east to west beginning in 1948 and on all subsequent aerial photographs. Outside the project area,the structures mapped on the 1949 Platteville 1:24,000-scale quadrangle are also visible as farmsteads and outbuildings along the two-track road in Section 24 and in Section 19 with a few trees around them. The two structures mapped in Section 13 north of the project area are visible as another farmstead. Between 1948 and 1978, it appears that no other developments were made to the project area,which, during that time, continued to largely be used for agricultural purposes. Modern aerial photographs between 1984 and 2021 reflect a similar trend. The farmstead mapped on the 1949 Platteville 1:24,000-scale quadrangle as north and outside of the project area in Section 13 and visible in aerial photographs from 1948 through 1978 had been removed by 1984; the farmstead property and trees are still visible on the photographs,but the buildings are no longer present. The pond, currently directly north of the project area, appears for the first time in 1984 as a narrow, long,north-south-oriented pond,which expanded to fill half of its current size in 1991 and occupied its current size by 1999. Overall,both the historical and modern aerial imagery show little development in the project area and surrounding landscape,beyond agricultural development. 11 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado SURVEY On August 5,2025, SWCA completed a survey of the project area to identify cultural resources and potential impacts the project may have on those resources.At the time of the August survey,the majority of the project area was a fallow agricultural field with evidence of industrial disturbance across the project area. Oil and gas infrastructure was present above ground near the west-central part of the project area. The north-central portion of the project area contained a house constructed in 2000 (Weld County 2025b). The house was a single residential structure surrounded by trees with associated roads to the southeast (across Meadow Island Ditch No. 1) and to the east. The eastern terminus of this driveway is a gate just north of the project area. The house has an artificially elevated earth footprint and a covered parking garage to the north. The northwest portion of the project area was a very heavily vegetated riparian environment surrounding an unnamed creek. The southern portion of the project area was heavily vegetated fallow agricultural field,with many invasive-loving species. Surrounding the oil and gas infrastructure,there were graded portions where introduced fill was laid down. Several improved roads providing vehicle access to these features were also present. Ground surface visibility was relatively low in the project area due to the dense vegetation, averaging 50%. Ground surface visibility in the southernmost portion of the project area was considerably lower (<10%), and the survey was not conducted in the far northwestern corner due to the difficulty in navigating low visibility stands of plants.No cultural materials outside of the ditch features were observed on the ground surface during the survey(Figure 6). Three shovel tests were placed to assess deposition potential for the mapped soils in the project area: two tests were conducted in an Altvan soil series, and one test was conducted in aquolls and aquents (see Figure 6). SITE NARRATIVES REDACTED UNDER 54 UNITED STATES CODE 307103 AND 36 CODE OF FEDERAL REGULATIONS 800.11(C)(1). 12 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado :::.',:tplia jilLikaar.......a:i401," 4 , - l- Y:ra f j, i 1 MI Pieu i il 4l . �tlf li „air t.),,:; 1 .1„1 St t li Negative Shovel Weld County,CO 0 160 320 OUSGS 7.5'Quadrangle: _Meterseet Test Platteville,CO,40104-87 0 40 80 T2N R67W Sections 13,24 0 Project Area NAD 1983 UTM Zone 13N 40.1281°N 104.8334°W N A Base Map:ESRfArcGfS OVIne, 1:4,000 accessed August 2025 Updated:,ovelT025 swrr w Project Na 99,123 •• \/\�.[l/"`,! Layout 99123 ShovelTosts Apr%',99123_occiPitNo1 Expaf olcf1 ENVIRONMENTAL CONSULTANTS Figure 6. Shovel tests excavated to examine deposition within the project area. 13 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado Shovel Test Results Given the location of the project area on the secondary terrace 0.5 mile west of the South Platte River, SWCA personnel excavated three shovel tests(ST1—ST3)to evaluate the subsurface strata in different areas of the project area and assess the potential for subsurface archaeological deposits(Table 5). ST1 and ST2 were placed in the northeast corner of the project area in a fallow agricultural field. ST1 was in the mapped Aquolls and Aquents,gravelly substratum. ST2,within the same field,was placed within Altvan loam, 0 to 1 percent slope(NRCS 2025). ST3 was placed in the west-central portion of the project area within a fallow agricultural field within the mapped Aquolls and Aquents, gravelly substratum. The three shovel tests revealed five strata: • Stratum I is grayish brown silty loam with some rounded gravels and a crumbly structure. • Stratum II is brown silty clay loam with many small gravels and some calcium carbonates. • Stratum III is tan sandy clay with iron red staining. • Stratum IV is dark brown/black sandy clay with few gravels. • Stratum V is grayish brown sandy loam with few rounded gravels. Tests revealed similar matrices,particularly in the northern agricultural field;however,variations in amount and size of pebble inclusions speak to slightly different alluvial deposition in these different areas. Shovel tests were terminated at gravel impasses.No cultural materials were observed in the three excavated shovel tests. These observations from shovel tests are consistent with Altvan soil units from recent alluvium in ST1 and ST2, and aquolls and aquents gravelly substrata mapped in the project area in ST3 (NRCS 2025). Although ST2 was in an area where aquolls and aquents were mapped,the soils excavated are consistent with an Ativan soil series. However,unlike ST1, ST2 shows evidence of agricultural disturbance, as it did not contain Stratum III. These tests confirm that these areas are alluviums that are heavily disturbed by agricultural activity and that have low potential for buried archaeological materials. These shovel tests indicated shallow gravelly substratum soils with no buried archaeological deposits. Table 5. Subsurface Test Results Test No. Depth Stratum(cmbs) Cultural Material (cmbs) I II III IV V ST1 38 0-13 13-30 30-38 — — None ST2 35 0-9 9-26 — 26-35 — None ST3 23 — — — — 0-16 None Note:cmbs=cm below surface Nonphysical Impacts Potential proximity(visual)effects and cumulative effects that could result from the project were considered within a 1-mile buffer around the project area. Historic properties for which setting and feeling contribute to the overall eligibility of the resource were assessed for potential visual and cumulative effects due to the project. 14 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado The landscape surrounding the project has been historically used and modified by agriculture since the 1860s. Settlement around what is now For Lupton, Colorado,began in 1859. This settlement and agricultural development are most evident today in the various historic-era ditches and scattered farmsteads in the study area. Oil and gas development of Weld County expanded in the 1930s, and evidence of this industry can be seen across the landscape surrounding the project area. These systems of extraction, storage, and conveyance are continuously maintained and upgraded,with the infrastructure scattered across the fields surrounding the project area. Much of the residential agricultural properties have regular maintenance conducted on their properties, altering,upgrading, and destroying historic-era structures in the region. Though some of the farms do retain their original houses and sometimes their mature shade trees,many more farms have heavily modified or replaced the original buildings. These developments in the area's landscape history have altered the feeling of the original historic setting of Weld County. Additionally, gravel mines,consistent with this project, are relatively common development features on this landscape surrounding the South Platte River. In summary,the landscape surrounding the project area consists primarily of working farms on both sides of the South Platte River. The oil and gas infrastructure are intertwined with agricultural use of the landscape,with the tanks at the associated well pads appearing similar to smaller silos and the pipe ducts on the pads appearing similar to irrigation pipes. Because of the dense stands of trees and vegetation along the South Platte River,the viewshed from areas east of the river toward the project area was entirely obscured at the time of recording and it is expected to remain so even in the winter where the trees have lost their leaves. In addition,the viewshed to the west is obscured by bluff located less than 0.25 mile away.As a result, although there are several resources in the surrounding landscape(both recorded and not),very few of them have direct viewshed from the project area,and those that do are already heavily impacted by the presence of multiple gravel pits. Similarly,the view from the resources to the project area are also lacking. The file search results indicate that nine previously recorded resources are within the PLSS sections within 1 mile of the project area. Of the resources within 1 mile, three are eligible or supporting the eligibility of an entire linear resource. Three of these sites are ditches or ditch segments,representing the Coalridge,Evans No. 2, and Lupton Bottom ditches. Resources within a 1-mile buffer around the project area whose setting and feeling could be character-defining elements are described in Table 6. The historical map and aerial review indicate that a handful of potential undocumented historic-era properties are present within 1 mile of the project area.All of these resources are of historic age.No other types of resources beyond roads, farms, or irrigation infrastructure, such as ditches,were identified in the historical map and aerial review within 1 mile of the project area. Three of the previously recorded resources, Coalridge Ditch(5WL1526), Evans No. 2 Ditch(5WL2188.8), and Lupton Bottom Ditch (5WL2652.9) ,have both recorded and unrecorded segments within the reviewed area. However, irrigation structures, such as ditches, are generally assessed under Criteria A,B, or C. Given this, setting and feeling are not character-defining elements of a county road or ditch; therefore,there will be no visual effect to the ditches. The project will consist of long-term,ground-disturbing activities, including subsurface excavation. The surrounding landscape is characterized by modern intrusions that already impact the viewshed, and the river and bluff,to the east and west,respectively,both obscure the view into the project area. Existing gravel pits and aboveground oil and gas infrastructure and transmission lines that surround the project area are generally visible across the landscape. Therefore,the visual impacts of another gravel pit will likely not result in a significant change to the potential eligibility or integrity of any resources in the vicinity. 15 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado Table 6. Summary of Nonphysical Impacts to Resources within 1 mile of the Project Area Site No./Site Time Period Resource Direction from Nonphysical Impact Name Description Project Area (distance in miles) 5WL816 Historic 1837 trading post Northeast(0.9) No visual impact;project area not marker(destroyed) visible from property due to topography and vegetation 5WL1018 Historic Railroad grade Northwest(0.25) No visual impact;project area not visible from property due to topography and vegetation 5WL1412 1910s Farm buildings West(0.6) No visual impact;project area not visible from property due to topography and vegetation 5WL3051 Historic Bridge South(0.6) No visual impact;viewshed already heavily impacted by active gravel pit 5WL5995 Unknown precontact Individual burial with East(0.9) No visual impact;project area not artifacts visible from property due to topography and vegetation This development is not a significant cumulative increase on the landscape and is in line with the larger development of the area. Overall,visual impacts are very low, as the surrounding areas are heavily disturbed and wooded along the South Platte River and canals.Additionally, a terrace is west of the site at the edge of the South Platte floodplain, and this obscures the viewshed of the project area to these resources. Given the cumulative visual impacts already present in the area,including oil and gas infrastructure, agricultural infrastructure, and modem developments, SWCA recommends that the project will result in no nonphysical effects to historic properties. CONCLUSIONS AND RECOMMENDATIONS SWCA conducted a cultural resource inventory for the project in Weld County, Colorado. J-T Consulting is proposing ground-disturbing activities to expand NCCI Pit No. 1, a gravel pit on a terrace of the South Platte River. The project is on privately owned surface land and consists of 66.7 acres. SWCA recorded a new segment of the Meadow Island Ditch No. 1 (5WL6107.5)and newly recorded two new cultural resources,both historic-era ditches(5WL10393 and 5WL10394). 5WL6107 needs data to determine its SRHP eligibility. However,the recorded segment is recommended as non-supporting of the resource's potential eligibility overall. SWCA recommends the project will result in no adverse effect to 5WL6107.5. Both 5WL10393 and 5WL10394 are newly recorded segments of unnamed ditches. Both ditches are recommended not eligible for the SRHP.No further work is recommended. Proximity(e.g.,visual) effects were considered within a 1-mile buffer around the project area on several previously recorded and potential,but unrecorded,historic properties where setting and feeling are considered character-defining aspects of significance or on Native American sites of cultural and religious significance. The project is within a landscape already containing a modem built environment where many of these modem intrusions are aboveground facilities more visible to the resources and closer than the current project. SWCA recommends that this project will have no nonphysical effects to historic properties. Given the level of depositional disturbance caused by the modem agricultural use on this parcel and disturbance associated with oil and gas infrastructure construction, which was confirmed by the survey 16 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado and shovel tests,neither shallow nor native sediments that could retain precontact or early historic-era archaeological sites are likely to remain in the project area. The three historic-era resources recorded within the project area are each segments of ditches that are not distinctive enough to be supporting segments to resource eligibility for the SRHP.Additionally,because 5WL6107.5 is still in use,the project is not expected to impact this resource.As a result,the project would result in no adverse effect to historic properties, and no additional archaeological assessment is recommended in the project area. 17 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado REFERENCES CITED Ancestry.com. 2025. W.E. Gee. Available: https://www.ancestry.com/.Accessed June 2025. Bureau of Land Management(BLM). 2025. General Land Office(GLO)records. Available at: https://glorecords.blm.gov/default.aspx. Accessed July 2025. Chapman, Shannen S., Glenn E. Griffith,James M. Omernik,Alan P. Price,Jerry Freeouf, and Donald L. Schrupp. 2006 Ecoregions of Colorado. Color poster with map, descriptive text, summary tables, and photographs. Scale 1:1,200,000.U.S. Geological Survey,Reston,Virginia. Colorado's Decision Support Systems. 2025a. Meadow Island Ditch No. 1 Ditch(0200821). Available at: https://dwr.state.co.us/Tools/Structures/0200821.Accessed October 2025. 2025b. Side Hill Ditch(0200816).Available at: https://dwr.state.co.us/Tools/Structures/0200816.Accessed October 2025. Colorado Division of Water Resources. 1882. State of Colorado,Arapahoe County in the District Court of the Second Judicial District of the State of Colorado Sitting in and for Arapahoe County #6009,in the Matter of a Certain Petition for Adjudication of the Priority of Rights to the Use of Water for Irrigation in the Water District No. 2. Available at: https://dnrweblink.state.co.us/dwr/DocView.aspx?id=577519&page=73&cr=1. Accessed October 2025. 1902. In the Matter of the Adjudication of Priorities of Right to the Use of Water for Irrigation Purposes in and for Water District No. 2,Water Division No. 1 of the State of Colorado (Decree).Available at: https://dnrweblink.state.co.us/dwr/DocView.aspx?id=494760&page=l&cr=1.Accessed October 2025. DataUSA. 2025. Fort Lupton, CO. Available at: https://datausa.io/.Accessed July 2025. Gantt,Erik, Stephan R. Anderson, and Kristin A. Gensmer. 2009. Suncor Energy(USA)Pipeline Company Rocky Mountain Crude System Expansion Pipeline Project: Class III Cultural Resource Inventory Laramie County,Wyoming and Weld and Adams Counties, Colorado. Centennial Archaeology. On file, Office of Archaeology and Historic Preservation,Denver, Colorado. Holliday,Vance T. 1987. Geoarchaeology and Late Quaternary Geomorphology of the Middle South Platte River,Northeastern Colorado. Geoarchaeology:An International Journal 2(4):317-329. Horn,Jonathon C. and Holly K.Norton. 2021. Walking the Line: Guidance for Identification,Evaluation, and Field Recordation of Historic Linear Sites in Colorado. Available at: https://www.historycolorado.org/sites/default/frles/media/document/2021/Colorado_Linear_Pap er_Final.pdf. Accessed August 2025. Lynch,Nancy. 2011. Weld County Towns: The First 150 Years. San Antonio, Texas: Historical Publishing Network. Mehls, Steven F., and Carol Drake Mehls. 1989. Survey Report,Weld County, Colorado Farm and Ranch Inventory,Weld and Broomfield Counties. Western Historical Studies,Inc. On file, Office of Archaeology and Historic Preservation,Denver, Colorado. 18 Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County, Colorado McFaul,Michael,Karen Lynn Traugh,Grant D. Smith,William Doering, and Christian J. Zier. 1994. Geoarchaeologic Analysis of South Platte River Terraces: Kersey, Colorado. Geoarchaeology: An International Journal 9(5):345-374. National Soil Survey. 2005 Official Soil Description,Altvan Series.NCSS,Denver, Colorado. Natural Resources Conservation Service (NRCS). 2019.Web Soil Survey.Available at: http://websoilsurvey.nrcs.usda.gov/app/.Accessed June 2025. Natural Resources Conservation Service (NRCS). 2025.US Watersheds: Platte River Basin Watershed. Available at: https://nres.maps.arcgis.com/apps/instant/basic/index.html?appid=c5 841399969a4f649fd0f806e 5bc4748. Accessed June 2025. NETROnline. 2025. Historic Aerials Viewer. Available at: https://www.historicaerials.com/viewer. Accessed July 2025. Office of Archaeology and Historic Preservation. 2007. Colorado Cultural Resource Survey Manual: Guidelines for Identification,History and Archaeology. Available at: https://www.historycolorado.org/sites/default/files/media/document/2017/1527.pdf. Accessed August 2025. Office of Archaeology and Historic Preservation. 2005. Colorado State Register of Historic Properties State Register Bulletin: How to Apply the State Register Nomination Criteria. Available at: https://www.historycolorado.org/sites/default/files/media/document/2021/960.pdf. Accessed October 2025. Turner,Randall,Kelly Pool,Tracy Bott,Corrine Camuso,Noah Oliver,Kae McDonald,John Scott, Stephanie Slaughter, and Holly Smith. 2008. Colorado Interstate Gas Company's Proposed High Plains Gas Pipeline Expansion Project: An Intensive Cultural Resource Inventory in Adams, Morgan, and Weld Counties, Colorado. Metcalf Archaeological Consultants. On file, Office of Archaeology and Historic Preservation,Denver, Colorado. Tweto, Ogden. 1979 Geologic Map of Colorado. Available at: https://ngmdb.usgs.gov/Prodesc/proddesc68589.htm.Accessed June 2025. U.S. Geological Survey(USGS). 2025. TopoView.National Geologic Map Database. Available at: https://ngmdb.usgs.gov/topoview/viewer/. Accessed July 2025. U.S. Geological Survey(USGS). 1902. Greeley, Colorado. Topographic map, 1:125,000-scale. U.S. Geological Survey,Washington,D.C. U.S. Geological Survey(USGS). 1949.Platteville, Colorado. Topographic map, 1:24,000-scale. U.S. Geological Survey,Washington,D.C. U.S. Geological Survey(USGS). 1954. Greeley, Colorado. Topographic map, 1:250,000-scale. U.S. Geological Survey,Washington,D.C. Weld County. 2025a. About Weld County.Available at: https://history.weldgov.com/Home. Accessed August 2025. Weld County. 2025b. Weld County Property Portal. Available at: https://propertyreport.weld.gov/?account=R4088386. Accessed August 2025. 19 History Colorado November 7,2025 Melanie Medeiros,M.A., RPA Principal Investigator SWCA,Denver Office 295 Interlocken Boulevard, Suite 300 Broomfield,Colorado 80021 Email: mmedeiros@swca.com RE: Cultural Resource Support for the NCCI Pit No. 1 Expansion Project in Weld County,Colorado/SWCA Project No. 99123 (HC#86855) Dear Mr.Medeiros: Thank you for your recent correspondence dated and received October 28,2025 initiating review of the above referenced action under the Colorado State Register Act(CRS 24-80.1 et seq.). Our office has reviewed the submitted materials,which were provided on behalf of the Colorado Division of Reclamation,Mining, and Safety(DRMS), and we offer the following comment that considers only the state action. Identification of Properties of Historical Significance Pursuant to CRS 24-80.1-104(3)water supply structures are exempt from the Colorado State Register Act. The proposed action will have no effect on any properties of historical significance,CRS 24-80.1-104(1). Please note that our comments should not be interpreted as concurrence under the National Historic Preservation Act or any other environmental law or regulation. Should the subject action change,we request that you contact our office for continued consultation under CRS 24-80.1. If human remains are discovered during ground disturbing activities,the requirements under CRS 24-80 part 13 apply and must be followed. In the event that there is federal agency involvement,please note that it is the responsibility of the federal agency to meet the requirements of Section 106 as set forth in 36 CFR Part 800 titled"Protection of Historic Properties." Section 106 consultation includes not only reasonable and good faith identification efforts of any historic properties located within the area of potential effects,but determining whether the undertaking will have an effect upon such properties. The State Historic Preservation Office,Native American tribes, representatives of local governments, and applicants for federal permits are entitled to consultative roles in this process. If we may be of further assistance,please contact Mark Tobias,Intergovernmental Services Manager,at(303) 866-4674 or mark.tobias@state.co.us. Sincerely, (for)Dawn DiPrince State Historic Preservation Officer cc. Jared Ebert, Senior Environmental Protection Specialist,DRMS History Colorado 1 1200 Broadway I Denver, CO 80203 1 303-447-8679 HistoryColorado . org Hello