The URL can be used to link to this page

Browse Search

Home My WebLink About20251635.tiffSTATE OF COLORADO DIVISION OF RECLAMATION, MINING AND SAFETY Department of Natural Resources 1313 Sherman St., Room 215 Denver, Colorado 80203 *j5) Phone: (303) 866-3567 FAX: (303) 832-8106 �',id y tlQa so‘' ok�0�g CONSTRUCTION MATERIALS C� 4°C\r44 REGULAR (112) OPERATION COLORADO DIVISION OF RECLAMATION MINING SAFETY CP"O44 RECLAMATION PERMIT APPLICATION FORM CHECK ONE: El There is a File Number Already Assigned to this Operation Permit # Ng() 2, -Li �3 4 (Please reference the file number currently assigned to this operation I • J New Application (Rule 1.4.5) Amendment Application (Rule 1.10) ELConversion Application (Rule 1.11) Permit # M - (provide for Amendments and Conversions of existing permits) M-2024-034 NCG/JLE 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): Asphalt Specialties Co., Inc. 1.1 Type of organization (corporation, partnership, etc.): 2. Operation name (pit, mine or site name): Marcovich Mining Resource 3. Permitted acreage (new or existing site): 57.28 permitted acres 3.1 Change in acreage (+) acres 3.2 Total acreage in Permit area 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: 5.3 Anticipated end use of incidental commoditie(s) to be mined: -2- 6. Name of owner of subsurface rights of affected land: refer to Exhibit O If 2 or more owners, "refer to Exhibit O". 7. Name of owner of surface of affected land: refer to Exhibit 0 8. Type of mining operation: Surface Underground 9. Location Information: The center of the area where the majority of mining will occur: COUNTY: Weld PRINCIPAL MERIDIAN (check one): ✓ SECTION (write number): TOWNSHIP (write number and check direction): RANGE (write number and check direction): QUARTER SECTION (check one): QUARTER/QUARTER SECTION (check one): 6th (Colorado) S7 1 T R 66 El10th (New Mexico) 11 North South a NE ❑ East ❑✓ West SW Ute GENERAL DESCRIPTION: (the number of miles and direction from the nearest town and the approximate elevation): 3 miles southwest of Fort Lupton. Elevation 4908 feet. 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 Longitude (W): deg min sec OR Example: (N) 39.73691° (W) -104.98449° Latitude (N) 40 .06158 Longitude(W) -104 .81903 OR Universal Tranverse Mercator (UTM) Example: 201336.3 E NAD27 Zone 13 4398351.2 N (2 decimal places) (2 decimal places) (5 decimal places) (5 decimal places) UTM Datum (specify NAD27, NAD83 or WGS 84) Easting Northing Nad 83 13 Zone -3- 11. Correspondence Information: APPLICANT/OPERATOR (name, address, and phone of name to be used on permit) Contact's Name: Company Name: Street/P.O. Box: City: State: Telephone Number: Fax Number: Daniel Hunt Asphalt Specialties Co., Inc Title: President 345 W. 62nd Ave Denver P.O. Box: Colorado (303 ) _ 289-8555 (303 ) _ 289-7707 PERMITTING CONTACT (if different from applicant/operator above) Contact's Name: Company Name: Street/P.O. Box: City: State: Telephone Number: Fax Number: INSPECTION CONTACT Contact's Name: Company Name: Street/P.O. Box: City: State: Telephone Number: Fax Number: Zip Code: 80216 Greg Geras Title: Land Resource Manager Asphalt Specialties Co., Inc 345 W 62nd Ave Denver P.O. Box: Colorado (303 ) _ 289-8555 (303 ) _ 289-7707 Zip Code: 80216 Greg Geras Title: Land Resource Manager Asphalt Specialties Co., Inc 345 W 62nd Ave Denver P.O. Box: Colorado (303 ) _ 289-8555 (303 ) _ 289-7707 CC: STATE OR FEDERAL LANDOWNER (if any) Zip Code: 80216 Agency: N/a Street: City: State: Zip Code: Telephone Number: ( ) - CC: STATE OR FEDERAL LANDOWNER (if any) Agency: N/a Street: City: State: Zip Code: Telephone Number: ( ) - -4- 12. Prima future (Post -mining) land use (check one): Cropland(CR) El Pastureland(PL) General Agriculture(GA) 1 2 1 Rangeland(RL) _O Forestry(FR) Wildlife Habitat(WL) El Residential(RS) El Recreation(RC) Industrial/Commercial(IC) ElDeveloped Water Resources(WR) _D Solid Waste Disposal(WD) 13. Prima ' resent land use check one OCropland(CR) Pastureland(PL) . General Agriculture(GA) O Rangeland(RL) I Forestry(FR) Wildlife Habitat(WL) Residential(RS) I Recreation(RC) II Industrial/Commercial(IC) — Developed Water Resources(WR) 14. Method of Mining: Briefly explain mining method (e.g. truck/shovel): loaders, dozers and haul trucks 15. On Site Processing: I 1 Crushing/Screening 13.1 Briefly explain mining method (e.g. truck/shovel): List any designated chemicals or acid -producing materials to be used or stored within permit area: 16. Description of Amendment or Conversion: If you are amending or converting an existing operation, provide a brief narrative describing the proposed change(s). -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 EXHIBIT B EXHIBIT C EXHIBIT D EXHIBIT E EXHIBIT F EXHIBIT G EXHIBIT H EXHIBIT I EXHIBIT J EXHIBIT K EXHIBIT L EXHIBIT M EXHIBIT N EXHIBIT O EXHIBIT P EXHIBIT Q EXHIBIT R EXHIBIT S Rule 1.6.2(1)(b) Rule 6.5 Legal Description Index Map Pre -Mining and Mining Plan Map(s) of Affected Lands Mining Plan Reclamation Plan Reclamation Plan Map Water Information Wildlife Information Soils Information Vegetation Information Climate Information Reclamation Costs Other Permits and Licenses Source of Legal Right -To -Enter Owners of Record of Affected Land (Surface Area) and Owners of Substance to be Mined Municipalities Within Two Miles Proof of Mailing of Notices to County Commissioners and Conservation District Proof of Filing with County Clerk or Recorder Permanent Man -Made Structures ADDENDUM 1 - Notice Requirements (sample enclosed) 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. 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. 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. 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. 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 34-32.5-115(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 /3-6 day of 3A.rte , . �} S cif S,i�e /- :e.5 Applitnt/Operat6r or Company Name Si"A Title: President State of L . ) ss. County of ,,-c. =c ) The foregoing instrument was acknowledged before me this Z38- ' , r �S3 , by (-1 ac ,�v. c). as Jan Nelson NOTARY PUBLIC STATE OF COLORADO NOTARY ID 19994030527 MY COMMISSION EXPIRES May 03, 2028 If Corporation Attest Signed: Corpora day of n t. of /lu -. 5 :.J -f -.c,)- Notary Public My Commission expires: - �� = f -1 Marcovich Mining Resource 112c Colorado Division of Reclamation, Mining, and Safety Construction Material Regular Operation Application May 2024 By: Asphalt Specialties Co., Inc. Represented by: L Lewicki 81 Associates Table of Contents INTRODUCTION EXHIBIT A LEGAL DESCRIPTION EXHIBIT B INDEX MAP EXHIBIT C PREMINE AND MINE PLAN MAPS EXHIBIT D MINING PLAN EXHIBIT E RECLAMATION PLAN EXHIBIT F RECLAMATION MAPS EXHIBIT G WATER INFORMATION APPENDIX G-1 HYDROLOGY CALCULATIONS APPENDIX G-2 GROUNDWATER QUALITY MONITORING PLAN EXHIBIT H WILDLIFE INFORMATION EXHIBIT I SOILS INFORMATION APPENDIX I-1 SOIL REPORT EXHIBIT J VEGETATION INFORMATION APPENDIX J-1 WETLANDS REPORT EXHIBIT K CLIMATE INFORMATION EXHIBIT L RECLAMATION COSTS EXHIBIT M OTHER PERMITS REQUIRED EXHIBIT N RIGHT OF ENTRY EXHIBIT 0 OWNERS OF AFFECTED LAND AND MINERAL TO BE MINED EXHIBIT P MUNICIPALITIES WITHIN TWO MILES EXHIBIT Q PROOF OF MAILING OF NOTICES TO THE BOARD OF COUNTY COMMISSIONERS AND SOIL CONSERVATION DISTRICT EXHIBIT R PROOF OF FILING WITH COUNTY CLERK EXHIBIT S PERMANENT MAN-MADE STRUCTURES RULE 1.6.2(1)(B) RULE 6.5 GEOTECHNICAL STABILITY EXHIBIT Marcovich Gravel Pit May 2024 0 Lewicki 8t Associates INTRODUCTION The proposed Marcovich Mining Resource is located just west of U.S. Highway 85 and southwest of the city limits of Fort Lupton in Weld County, CO. The property is bound by the South Platte River to the west. Asphalt Specialties Co., Inc. (Asphalt Specialties) is both the permittee and operator of the proposed aggregate mining operation. The site contains a group of agricultural fields, a residence, stock watering ponds, and agriculture related buildings. Mining access to the site will be via an easement across the agricultural parcel to the south and into the Asphalt Specialties Chavers Mining Resource (M-2015-030). Asphalt Specialties is proposing that the site be converted to a gravel pit to feed raw materials to their processing and sales point at the Chavers Mining Resource. The permit area of this operation will be 57.28 acres. The affected area will be 44.3 acres. Reclamation will convert the site to water storage ponds surrounded by rangeland. A portion of the ponds may be refilled based on market conditions for inert fill disposal. The proposed operation at the Marcovich Mining Resource will consist of mining sand and gravel, then transporting material to the Chavers Mining Resource. Processing of the extracted materials at the Chavers Mining Resource will include crushing, screening, washing, and the use of concrete and asphalt plants. Marcovich Gravel Pit May 2024 i-1 0 Lewicki & Associates EXHIBIT A LEGAL DESCRIPTION The site is located southwest of the City of Fort Lupton in Weld County, Colorado. A legal description is shown on Map C-1 which is included in Exhibit C. A general location map is shown in Exhibit B which indicates the mine entrance coordinates. The Marcovich Mining Resource is located southwest of Fort Lupton in Weld County, CO in part of the Northeast 1/4 of the Northwest % of Section 7, Township 1 North, Range 66 West, of the 6th Principal Meridian (PM) . The legal description of Parcel 147107000015 is as follows: IMPS ONLY PT S2 7 1 66 BEG NOD12'W 1097' OF S4 COR SEC N89D25'E 208.03' TO WLY R/W HWY 85 N03D48'E 1533.02' TO E -W C/L SEC S89D02'W 315.34' S89D02'W 1316.88' SOD10'E 1517.87' N89D25'E 1317.3' TO BEG The parcel contains 55.20 acres more or less. Two temporary easements have been granted to the operation to cross the Sakata Farms Inc. and Ogilvie properties. Both easements are 40 feet wide. The Sakata easement is 1,160 feet long for a total of 1.07 acres. The Ogilvie easement is 1,100 feet long for a total of 1.01 acres. Therefore, the total permit acreage is 57.28 acres. Marcovich Gravel Pit May 2024 A-1 Lewicki 8t Associates EXHIBIT B f `.Atave'c :1Pm rj Google Earth INDEX MAP R:soui,ce: Fort Lupton Mine Entry: 40.06158 -104.81903 Marcovich Gravel Pit May 2024 B-1 Lewicki & Associates EXHIBIT C PREMINE AND MINE PLAN MAPS Map C-1 Access Road Map C-2 Current Conditions Map C-3 Mining Plan Map C-4 Cross Sections Marcovich Gravel Pit May 2024 C -I isLewicki 8t Associates EXHIBIT D MINING PLAN 1. General Mining Plan The property boundary has been surveyed. Map C-3 outlines the mining plan including the affected area of 44.3 -acre. Sand and gravel will be extracted for use in construction materials such as crushed rock, sand, washed rock, concrete, and asphalt. There is also the possibility of incidental fill dirt production. Access to the mine will be through a new road constructed between the current site and Chavers Mining Resource (M-2015-030). This road has been included in the legal description. The access road has been specifically designed to accommodate mine traffic, with all necessary earthwork for road improvement completed before mining begins. To prevent groundwater infiltration into the pit and facilitate water storage, a slurry wall will be installed around the mining area. Dozers and scrapers will strip topsoil and overburden from mining areas, storing them in designated stockpiles. Any stockpile remaining for over 90 days will be seeded to prevent erosion. During pre -mine stripping, all existing buildings, except the manufactured home and garages, will be demolished, and debris will be entirely removed from the site. Sand and gravel extraction will involve loaders, excavators, dozers, and trucks, with material transported to Chavers Mining Resource for processing. Backfill materials may be hauled back to this site from the Chavers Mining Resource. While haul trucks are currently anticipated, there is potential for replacement by a conveyor belt in the future. The sand and gravel deposit, averaging 20-23 feet in thickness, will be mined progressively from north to south. Mining and reclamation will occur simultaneously to minimize overall disturbance. There is ample on -site topsoil and overburden for successful reclamation, transforming the site into water storage ponds surrounded by rangeland. The reclamation process will involve backfilling, regrading, topsoiling, and revegetation. Some or all of the water storage pond may be filled based on market demands for inert fill disposal. Mining will extend to the bottom of the gravel deposit, maintaining final mining slopes at 1.5H:1V along the perimeter. The active highwall will have a near -vertical slope, progressing halfway down the final mining slope to enable the dozer to knock down the remaining highwall, creating the completed mining slope. Slopes will then be backfilled with sand or overburden to achieve the reclaimed 3H:1V slopes, with specific slope details available on Map C-4 cross sections. No blasting will occur at the Marcovich Mining Resource. If refuse, acid, or toxic materials are unexpectedly encountered, these materials will be removed from the site and disposed of appropriately. Marcovich Gravel Pit May 2024 D-1 Lewicki & Associates 2. Mining Timetable Mining operations at the Marcovich Mining Resource are expected to take approximately 7.3 years to complete, based on an annual average production of 700,000 tons. Actual production rates will fluctuate based on market conditions. An approximate mining timetable based on this production and the phased mining plan is shown in Table D-1. Table 0-1 Mining Timetable Description Time Required Construction of access road and slurry wall. 2 months 1 month Initial stripping of Northern Phase. Mine and reclaim Northern Phase according to 3 years ! approved plans. Reclamation occurs as mining has reached its maximum extents in an area. Initial stripping of Southern Phase. Mine and reclaim Southern Phase according to approved plans. Reclamation occurs as mining has reached its maximum extents in an area. Total 1 month 3 years 7.3 years 3. Mine Facilities and Operation The site will contain the following facilities and equipment: Facilities: - Portable toilet - Mine office (portable) Portable fuel storage Equipment: Front-end loaders - Bulldozers Scrapers - Haul trucks (off highway) Water trucks Graders Excavators Conveyors Asphalt Specialties will provide portable toilets and bottled water to employees on site during operations. Any fuel stored on site will have full secondary containment that can carry 110% of the fuel tank volume. All facilities will be removed during reclamation. Marcovich Gravel Pit May 2024 D-2 Lewicki & Associates 4. Topsoil and Overburden Handling Topsoil averages 0.5-1.5 feet, averaging 1 foot, overlying 2.5 feet of overburden. Topsoil and overburden will be stripped with appropriate earthmoving equipment as deemed suitable for the operation such as front-end loaders, dozers, excavators, and water trucks. Topsoil and overburden will be stockpiled separately onsite in either designated stockpiles, berms, or directly placed to create final reclamation slopes. Stockpiles must be below the elevation of the baseline conditions because the site is nearly entirely within the floodplain. The very first portion of stripping will be hauled from Marcovich to Chavers. After that stripped materials will be directly placed into reclamation or stockpiled on the pit floor. These materials will be directly placed in the designated stockpile areas or berms which can be seen on Map C-3. Stockpiles to be in place longer than 90 days will be seeded with the permanent seed mix to prevent erosion (see Exhibit E for seed mix). An average of one feet of topsoil and 2.5 feet of overburden were assumed to determine the overall material balance shown in Table D-2. Table D-2 Topsoil and Overburden Material Generated During Mining Stripping Area (ac) Material Generated (CY) Topsoil 32.1 Overburden 32.1 51,870 129,680 Due to the reclaimed land use as water storage ponds, there will be an excess of topsoil than what is needed for reclamation. This is because the pond makes up the majority of the reclaimed land and does not need to be topsoiled entirely. There is not enough overburden to meet reclamation needs by itself, however, with excess topsoil and potential sand, there is more than enough material on site for reclamation. Excess topsoil and overburden will be used to achieve the final grading shown in the reclamation map in Exhibit F. Overburden, topsoil, and sand will be used to backfill mining slopes to their final reclaimed state. Topsoil will be replaced on all disturbances outside of the ponds and on the pond slopes. It will not be replaced on the pond floor. Topsoil will be replaced in an average two -foot layer to restore the existing soil conditions. Details pertaining to reclamation can be found in Exhibit E and the maps in Exhibit F. 5. Site Access The Marcovich Mining Resource will be accessed via two easements to cross agricultural land to the active Chavers Mining Resource. A 40 -foot wide easement has been granted to the operator. A two lane graveled road will be constructed. This road will remain in place after mining is completed. Easements are shown on map C-1. Marcovich Gravel Pit May 2024 D-3 Lewicki & Associates 6. Water Information, Rights, and Augmentation All water right issues such as availability of water for this operation, consumption rates, dust control, etc. are presented in Exhibit G — Water Information. 7. Schedule of Operations Mining operations will occur as dictated by demand with an average annual production of 700,000 tons. Mining, screening, and processing will be conducted on site with portable equipment throughout the year. The operator will not have night gravel mining operations, although minor truck activity and repairs may occur after hours. 8. Weld County Impacts and Environmental Impacts All potential county impacts and concerns are addressed in the Weld County Use by Special Review. Marcovich Gravel Pit May 2024 D-4 U Lewicki 8i Associates EXHIBIT E RECLAMATION PLAN 1. General Reclamation Plan The total affected area to be reclaimed under this permit is 44.3 acres out of the 57.28 -acre permit area. Reclamation of the Marcovich Mining Resource will convert the site to a final land use of a water storage pond and rangeland. Reclamation will occur concurrently with mining. Final reclamation will be completed after mining has finished. The pre -mine land use is predominantly agriculture with one residence. Surroundings land uses include agriculture, open space, and mining. Pursuant to Rule 6.4.5.2(b), the applicant evaluated the post -mine land use in regard to adopted state and local land use plans for this area and adjacent land uses. The proposed post -mine land use of water storage ponds and rangeland is compatible with the general agricultural character of the area. Table E-1 below summarizes the anticipated final land uses within the affected area upon completion of reclamation. The distribution of rangeland and water storage pond may vary based on the market demand for inert backfill storage. Table E-1 Reclamation Areas Description Area (Acres) Rangeland Water Storage Pond Disturbed Area Total Undisturbed Area 12.1 26.7 38.8 18.5 Total Affected Area 57.28 Reclamation will occur concurrently as mining progresses. No more than 1,000 feet of highwall will be unreclaimed at a time. Mining slopes will be backfilled and graded to a maximum 3H:1V slope. The slopes will then be compacted for stabilization and to prevent erosion. All portable facilities and equipment will be removed from the area. All berms will be flattened. The slurry wall will remain during and after reclamation. The pond slopes and any other surrounding disturbances will be topsoiled and seeded for revegetation. Topsoil will be replaced in a two -foot layer to restore the current soil profile. Revegetation will be completed using a native seed mix recommended by the Natural Resource Conservation Service. Revegetation efforts will be monitored following reclamation. The pit will be used for freshwater storage after it has been fully reclaimed and revegetated. There will be more than enough material stockpiled from on -site materials to fulfill reclamation needs as the groundwater lake takes up the majority of the reclamation area. Table E-2 shows the volumes of topsoil and overburden required for reclamation and the material volumes that will be stripped and stockpiled. As shown, there is an excess of topsoil that is stripped versus what is required for reclamation. The stripped overburden does not meet the amount required for backfilling the pits. However, there will be an excess of topsoil and sand that will be more than enough to meet these requirements. These calculations were made assuming that the site Marcovich Gravel Pit May 2024 E-1 0 Lewicki & Associates has a uniform one foot of topsoil and 2.5 feet of overburden across all areas. Sand volumes were not calculated as detailed information on their location and thickness were not obtained. No sand volume is assumed for the reclamation volume balance calculations, however, sand is very likely to be encountered. Any sand encountered will either be sold or used to augment the overburden for backfill. Topsoil will be replaced in an average two -foot layer across all non -pond disturbances, while overburden and other excess material will be used to backfill the pit slopes from 1.5H:1 V to 3H:1 V. Table E-2 Reclamation Volumes Material Available on Site Requirements for Reclamation Reclamation Area Mining Area & Surroundings Area (acres) 32.2 Topsoil Stripped 51,870 Overburden Stripped (CY) 129,680 Topsoil Required (Cy) -- 30,300 Overburden Backfill Required (CY) 109278 Excess material will be used for backfilling slopes. Sand that may be encountered will be used for backfilling or will be sold. Asphalt Specialties will keep the minimum amount of material (topsoil, overburden, and potentially sand) required for reclamation throughout the entire mine life. Based on market demand, a portion or all of the area within the slurry wall may be backfilled. If the site is completely or partially backfilled the amount of area reclaimed as dry rangeland will increase. The operator will ensure that material is clean and uncontaminated. They will utilize the same forms as the Chavers Resource because the Chavers resource will act as the processing and sales point for the Marcovich site. 2. Topsoil Replacement An average of one foot of topsoil will be stripped and stockpiled prior to mining. After backfilling and grading has been completed during reclamation, topsoil will be replaced at 0.5 to 1.5 feet, at an average depth of one foot in a manner that is similar to the pre -mine soil profile. Topsoil will only be placed on the pond slopes and other surrounding disturbances. Topsoil will not be replaced on the pond floors. Replaced topsoil will be directly placed by loaders and haul trucks. All topsoiled areas will be disced to aid in root penetration. 3. Haul Roads and Access All internal haul roads will remain following reclamation to support the future land use. Marcovich Gravel Pit May 2024 E-2 Lewicki 8( Associates 4. Reclamation Timetable and Sequence The sequence and timing of reclamation can be seen in Table E-4 below. The reclamation schedule is dependent on the rate of mining and fluctuating market demands. The operator will reclaim the site concurrently with the progression of mining to limit the total disturbance. Table E-4 Reclamation Timetable i)esui'Iption Develop and mine Northern Phase lithe Required 3 years Develop and mine Southern Phase 3 years Backfill, topsoil, and revegetate remaining disturbances 1 year Vegetation monitoring 2 years Total 9 years 5. Revegetation Plans Seed will be placed in all areas to be vegetated following grading, topsoiling, and discing of the soil. All disturbances that are retopsoiled will be seeded with a Rangeland Seed Mix. The Weld County recommended mix to be used is as follows: 5.1. Rangeland Seed Mix Species Pounds of pure live seed per acre (drilled) Sand Bluestem 1.0 Sand Lovegrass 2.5 Indian Ricegrass 3.0 Prairie Sandreed 0.75 Green Needlegrass 1.5 Little Bluestem 0.75 Yellow Indiangrass 0.5 Switchgrass 1.5 Sand Dropseed 0.5 Total 12.0 Broadcast seeding will be done at double the drill rate. Mulch will be placed at roughly 4000 pounds per acre. Marcovich Gravel Pit May 2024 E-3 U Lewicki & Associates 6. Post Reclamation Site Drainage The site will drain internally following reclamation. All water that enters the site will drain to the water storage pond in the center of the site. Refer to map G-1 for the post reclamation drainage of the site. 7. Revegetation Success Criteria Revegetation will be deemed adequate when erosion is controlled, the vegetation cover matches neighboring wildlife habitat areas, and when it is considered satisfactory according to Division standards. This will be monitored for a minimum of two years following the completion of reclamation. 8. Monitoring Reclamation Success Measures will be employed for the control of any noxious weed species. The objective of this weed management plan is to control undesirable plants on the Marcovich property. Plants identified through the Colorado Noxious Weed Act (C.R.S 35-5.5) and the Weld County Noxious Weed List as undesirable and designated for management within the county will be removed. Any weeds identified as List A species will be eradicated. Other lower listed plants identified as noxious weeds will be managed by control measures. A Weed Control Plan will be utilized as follows: 1) Each April, a weed survey will be taken of the permit area. 2) If any patches or plants have been identified, they will be sprayed by backpack sprayer or 4 -wheeler using chemicals approved for use by the weed control staff of Weld County. 3) After reclamation, weed surveys and spraying will continue until the perennial cover and production of the site have met DRMS requirements and bond release has been obtained. The Division and Weld County staff will be consulted regarding any weed infestation areas and any control measures prior to their initiation. The plan does not contemplate total weed removal on the property. Rather, the goal is to prevent the spread of weeds into uninfected areas as is the primary goal of the Weld County Weed Management Plan. Each year during the mining operation, the permit area will be monitored closely, through which the operator may determine if any additional weeds have grown. If any new species of weeds are found, Weld County and the Division will be consulted in order to formulate the best plan for the new infestation. 8.1. Weed List Weeds listed in Table E-1 will be eradicated or suppressed according to Weld County requirements. Marcovich Gravel Pit May 2024 E-4 0 Lewicki & Associates Table E-1. Weld County Weed List Eradication Suppression List A (in Weld County) Cypress Spurge Haire Willow -Herb Japanese Myrtle Spurge Purple Loosestrife Yellow Flag Iris List B (in Weld County) Absinth Wormwood Black Henbane Bull Thistle Chamomile species Chinese Clematis Houndstongue Moth Mullein Oxeye Daisy Plumeless thistle Spotted knapweed Sulfur Cinquefoil Tamarisk Wild Caraway Yellow Toadflax Canada Thistle Common 81. Cutleaf Thistle Eurasian Watermilfoil Jointed Goatgrass Musk Thistle Russian knapweed Scotch Thistle Yellow Nutsedge Bouncingbet Common Tansy Dalmation Toadflax Dames Rocket Diffuse Knapweed Hoary Cress Leafy Surge Perrenial Pepperweed Russian Olive List C (in Weld County) Common Mullein Cheatgrass/Downy Brome Field Bindweed Puncturevine/Goatheads Marcovich Gravel Pit May 2024 E-5 Lewicki & Associates EXHIBIT F RECLAMATION MAPS Map F-1 Reclamation Plan Marcovich Gravel Pit May 2024 F-1 0 Lewicki & Associates EXHIBIT G 1. General WATER INFORMATION The Marcovich Mining Resource is within the floodplain and floodway of the South Platte River. There is a return irrigation ditch that traverses from east to west through the center of the site. Stock ponds have been constructed south of this ditch and are filled by return irrigation water from the parcel sound of the permitted area. Mining within the floodway will be conducted with no filling or stockpiling above the natural ground grade. Groundwater is located roughly five feet below the natural grade. All groundwater onsite is part of the South Platte River alluvial aquifer. Prior to mining, a slurry wall will be installed around the perimeter, as shown on Map C-3. These slurry walls will be for the development of water storage reservoirs following reclamation. Asphalt Specialties is committed to protecting the hydrological balance and water quality at the site. 2. Water Quality Protection The primary concerns surrounding water quality protection at the Marcovich Mining Resource site are the potential impacts to the surface and groundwater from sediment, hydraulic fluids, and diesel fuel. Sediment will be controlled through the use of stormwater retention within the disturbance area through the life of the mine. The site will be graded in a manner that maintains all surficial flows within the disturbed area, in turn containing all sediment and unwanted discharges from leaving the site. Hydraulic fluids and diesel fuels will be contained within vehicles that follow best practices of maintenance; these practices include regular inspections of vehicles, hydraulic lines, and any other potential spill sources. Diesel fuel or other oils will not be stored on -site. Any surface water discharges from the site will be sampled in accordance with the NPDES discharge permit. All discharge will be via the approved Outfall, the proposed location of which is shown on Map C-3. Marcovich Gravel Pit May 2024 G-1 ElLewicki 8( Associates Table G-1. Surface Water Discharge Monitoring Requirements in NPDES Discharge Permit Parameter Flow Monitoring Frequency Instantaneous, Monthly Sample Type In -situ pH 2x/month Grab Total Suspended Solids 2x/month Grab Oil and Grease Visual 2x/month Visual Oil and Grease Contingent on visibility of oil and grease Grab Total Flow Instantaneous, Monthly Calculated Selenium, Potentially Dissolved 2x/month Grab Total Dissolved Solids Quarterly Grab Note: these are the anticipated analytes based on operator experience at similar sites. CDPHE may issue different sampling requirements with the permit. 3. Floodplain The majority of the site is within the 100 -year floodplain and floodway as reported by the Federal Emergency Management Agency. These boundaries are shown in the Exhibit C and F maps. The minimum distance maintained from the South Platte River to excavation activities is 100 feet. Additionally, no stockpiling or filling above the natural grade will occur in the floodway. Overall, the downstream flood impacts should remain the same or be reduced from activity at the site as the removal of material results in more storage space for flood water below the existing grade. A no -rise certification has been provided to Weld County as part of its floodplain development permit. In accordance with the Mile High Flood Control District technical guidelines, inflow/outflow structures will be installed along the riverbank where mining reaches its closest point to the South Platte River. Details of these designs can be seen on Map G-1. In the event of flooding at the site, equipment from the active mining floor will be removed and the pit will be allowed to fill with water. The flooded pit will be pumped only after the flood has subsided. All fuel will be stored at least one foot above the base flood elevation and in sufficient secondary containment with 110% carrying capacity. 4. Wetlands The National Wetlands Inventory aerial -based mapping indicates the presence of wetlands within the permit area. They are however limited to a concrete lined ditch and a settling pond at the end of the ditch. An onsite inventory of potential wetlands will be undertaken before disturbing these areas. Exhibit C and F maps show the NWI mapped wetlands. Marcovich Gravel Pit May 2024 G-2 Lewicki & Associates 5. Aquifers The only identified aquifer located at the site is the shallow alluvial aquifer of the South Platte River. The depth to this aquifer varies throughout the year but is typically five feet below surface. According to the U.S. Geological Survey's Ground Water Atlas of the United States', the underlying bedrock aquifer is the Laramie Fox Hills Aquifer of the Denver Basin system. The entirety of the Marcovich Mining Resource mining operation will take place in the overlaying alluvium above a shale/siltstone layer; the Laramie Fox Hills Aquifer will not be mined. 6. Surface Water The mining operation will impact surface water in the area through the stormwater runoff that enters the site. Map G-1 shows the drainage patterns and how they are affected throughout the life of the mine. The maps include information on the drainage basins currently, during mining, and post reclamation as well as the drainage directions throughout these stages. The primary concern for surface water protection at the site is preventing the discharge of sediment, oil, and/or hydraulic fluids from the operation areas. Oils and hydraulic fluids are stored on site following the standard best management practices. These practices include the use of secondary containment at fluid storage and transfer points, spill kits, and employee training regarding safe handling practices. Sediment is trapped onsite using controls and best management practices by directing and controlling surface water runoff that enters the disturbed areas. More information on sediment and surface water control is provided below. 6.1. Surface Water Handling One drainage basin collects all stormwater runoff on and around the Marcovich site. This is shown on the Drainage Map. Currently, the area has a series of dams to provide stock watering ponds. Those ponds will be removed prior to mining. 6.1.1. Mining During all phases of mining, surface water runoff will drain to the active pit or reclaimed reservoir. Water collected in the active mining pod will be allowed to evaporate or will be discharge via the approved CDPHE outfall once sediment has settled out. 6.1.2. Post Reclamation The drainage patterns during mining will be retained following reclamation of the site. Any surface water runoff will collect in the reclaimed reservoir. There is enough storage capacity above the anticipated reservoir level and the top of the shore to store the 100 -year storm events. More on those calculations are provided in section 6.2 below. ' https://pubs.usgs.gov/ha/ha730/ch_c/ Marcovich Gravel Pit May 2024 G-3 Lewicki Si Associates 6.1.3. Flood Protection Mining will extend to within 200 feet from the South Platte River as shown on the Drainage Map. Due to this proximity to the river, measures will be taken to protect the riverbank from erosion during a flood event. An inflow and outflow structure will be constructed between the River and the mining pod once mining is within 300 feet of the river. These structures will allow for the safe exchange of flood waters between the pit and river which prevents erosion of the riverbank and pitside slope during flood events. These structures are of a design approved for use by the Mile High Flood District. Details of the inflow/outflow structure are shown on Map F-2. 6.2. Disturbed Area Runoff During all stages of mining, there is enough water storage capacity to contain the 5 -year and 100 -year 24 -hour storm events and prevent erosion from surface water discharge. The expected rainfall from these events at the Marcovich Site is provided in Table G-2 below. Table G-2. Area Storm Events (from NOAA2) Event Probability Event Rainfall (inches) 2.29 5-YR 24 -HR 100-YR 24 -HR 4.64 The peak runoff was generated from these values for the three drainage basins during all stages of mining. Pre -mine, mining, and reclamation conditions are delineated on the Drainage Map. The discharge volumes from these storm events are calculated in Appendix G-1 at the end of this exhibit. Table G-3 summarizes the runoff volumes and storage volumes for each drainage. All drainage calculations were made using the Rational Method identified in the Mile High Flood Control District. Table G-3. Drainage Calculations Drainage Basin 1 Site Condition Base 44.0 Mine ,, 44.0 Reclamation 44.0 100-Yr 24 -Hr Discharge Area (ac) ; Curve Number Flow Rate Runoff (ac -ft) (gpm)* 70 6.55 0 82 10.3 1000-3000** 820 89 12.8 0 81.6 Detention Capacity (ac -ft)*** N/A * The discharge flow rate is calculated from the peak discharge of the 100-Yr 24 -Hr storm event. **Discharge flow rate is variable and controlled during mining as all discharges are pumped from the pit ***Detention Capacity calculated in CAD as the surface volume above the pit floor (approx. 25 feet @ 32 acres) or water storage pond (approx. 3 feet @ 27 acres). 'National Oceanic and Atmospheric Administration Marcovich Gravel Pit May 2024 G-4 Lewicki & Associates 7. Groundwater Groundwater is located approximately five feet below the surface at the Marcovich site. This was determined from wells installed onsite. Table G-4 outlines all wells within 600' of the permit area. These well locations are also shown on Map C-2. Groundwater quality data was gathered in advance of mining. This data and discussion of it can be seen in the Groundwater Monitoring Plan in Appendix G-2. Table G-4. Wells Within 600' of Permit Area Applicant/Well ID ELIZABETH A WETHINGTON & CO I 197906 30 ` Domestic Stock WETHINGTON, ELIZABETH A 19458 -F -R 34 Irrigation Total Depth Permit ID (feet) Purpose Distance from nearest mining area (ft) EHELNS, WM H 936-WCB 48 Irrigation ASPHALT SPECIALTIES CO., INC. 4000003- 29 Monitoring (HUNT, DAN) MH LELL, J j 124421 34 Domestic CENTRAL COLO W CONSER DIST 20005-F 41 Other *Lell, J and Asphalt Specialties wells on the property are under the applicant's control. 600 <100 but spotted from quarters_ <100 but spotted from quarters 0 375 7.1. Groundwater — Monitoring Plan The operator is in the process of collecting the minimum required five (5) quarters of background data to characterize baseline groundwater conditions prior to the start of mining. To -date, data has been obtained from June 2023 through April 2024. This includes 11 of the 13 monthly groundwater elevations (for groundwater quantity) and four (4) of the five (5) quarterly groundwater sampling events (for groundwater quality). This data, along with INS Table 1 - 4 Groundwater Quality Standards, is presented in Appendix G-2. Once the initial baseline monitoring period is complete (after June 2024), the GWMMP will be submitted to DRMS as a technical revision. 7.2. Groundwater — Mining Prior to mining, a slurry wall will be installed around the perimeter of the pit to prevent groundwater flow into the mining area. Following slurry wall installation, the operator will mine out the pod by dewatering it via the approved CDPHE discharge point. Pumping to conduct this dewatering will take place during the initial mining and then pumping will cease. Stormwater runoff that is collected may be pumped out to protect local water rights, once sediment has settled. For this reason, the CDPHE discharge point will be maintained over the life of the mine. The pump will be located at least two feet below the active mining floor at the lowest point of the pit. It will be surrounded by a gravel filter. This configuration minimizes the risk of sediment being pumped out of the pit. Marcovich Gravel Pit May 2024 G-5 U Lewicki & Associates The typical pit pump location can be seen on Map C-2. 7.3. Groundwater — Reclamation A permanent water storage reservoir will be left behind, as can be seen on Map F-1. There will be no groundwater consumptive use in reclamation. 7.4. Groundwater — Slurry Wall Impact The installation of a slurry wall within the alluvial aquifer of the South Platte River may create two potential impacts to the aquifer: the creation of local groundwater shadows or mounding that damage neighboring structures or property and the potential exacerbation of regional groundwater impacts. For these reasons, the applicant will submit a groundwater model prior to installation of the slurry wall. If the determined by modelling, a French drain system will be installed to mitigate modelled impacts. 8. Water Related Permits The operator is applying for all necessary permits that have not already been acquired for water handling at the Marcovich Mining Resource. This includes a discharge permit with the Colorado Department of Public Health and Environment and a gravel well permit for initial dewatering of each pod with the Colorado Division of Water Resources. 9. Water Consumption and Source Water for dust control will be the primary consumptive use at the Marcovich Mining Resource site. Water will be purchased from a local source during operations for consumptive uses. No ongoing water consumptive use exists in reclamation, since the water storage pod is lined. This water will be sourced from a freshwater pond in the processing area. This pond will be covered by a gravel well permit. Table G-7 summarizes the estimated water consumption for the operation throughout the year. Marcovich Gravel Pit May 2024 G-6 ® Lewicki 8r Associates Table G-5. Water Consumption Dust Evaporative Water Removed Month Control Depletions from Mining (ac -ft) (ac -ft) (ac -ft) Total (ac -ft) Jan 0.11 !' Feb 0.12 Mar 0.19 Apr 0.32 May 0.42 Jun 0.51 Jul 0.53 Aug 0.47 Sep 0.35 Oct 0.25 Nov 0.14 Dec 0.11 0.00 0.00 0.00 0.00! 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.1 0.1 0.2 0.3 0.4 0.5 0.5 0.5 0.4 0.3 0.1 0.1 Total 3.50 0.00 0.00 3.5 The Marcovich Mining Resource sources water for operations via water contract. Any groundwater exposure will be covered by a gravel well permit with the Colorado Division of Water Resources. Marcovich Gravel Pit May 2024 G-7 Lewicki & Associates Appendix G-1 Hydrology Calculations Marcovich Gravel Pit May 2024 G-8 II Lewicki & Associates 1 Hydrograph Summary Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to Peak (min) Hyd. volume (cuft) Inflow hyd(s) Maximum elevation (ft) Total strge used (cuft) Hydrograph Description 1 SCS Runoff 3.616 2 822 62,045 --- -- -- Baseline 2 SCS Runoff 34.92 2 734 154,571 — -- -- Mining 3 SCS Runoff 53.17 2 732 229,741 --- ----- -- Reclamation C:\Users\Sydney\GLA Dropbox\Sydney ConnoRe h Odci51tfet lVlarcovichWuiveiAiAndrbg .gpw 2 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Hyd. No. 1 Baseline Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 5 yrs = 2 min = 43.900 ac = 0.0 % = TR55 = 2.29 in = 24 hrs Peak discharge = 3.616 cfs Time to peak = 822 min Hyd. volume = 62,045 cuft Curve number = 71* Hydraulic length = 0 ft Time of conc. (Tc) = 146.80 min Distribution = Type II Shape factor = 484 * Composite (Area/CN) = [(0.900 x 100) + (2.300 x 30) + (11.600 x 49) + (5.000 x 89) + (21.900 x 80) + (2.200 x 86)] / 43.900 Q (cfs) 4.00 3.00 2.00 1.00 Baseline Hyd. No. 1 -- 5 Year 0.00 — Q (cfs) 4.00 3.00 2.00 1.00 0.00 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 1680 Time (min) Hyd No. 1 3 TR55 Tc Worksheet Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. 1 Baseline Description Sheet Flow Manning's n -value Flow length (ft) Two-year 24 -hr precip. (in) Land slope (%) Travel Time (min) Shallow Concentrated Flow Flow length (ft) Watercourse slope (%) Surface description Average velocity (ft/s) Travel Time (min) Channel Flow X sectional flow area (sqft) Wetted perimeter (ft) Channel slope (%) Manning's n -value Velocity (ft/s) A B C = 0.011 0.011 0.011 = 0.0 0.0 0.0 = 0.00 0.00 0.00 = 0.00 0.00 0.00 Totals = 0.00 + 0.00 + 0.00 = 0.00 = 1333.00 = 0.01 = Unpaved =0.15 0.00 0.00 Unpaved 0.00 0.00 0.00 Paved 0.00 = 146.79 + 0.00 + 0.00 = 146.79 = 0.00 = 0.00 = 0.00 = 0.015 =0.00 0.00 0.00 0.00 0.015 0.00 0.00 0.00 0.00 0.015 0.00 Flow length (ft) ({0})0.0 0.0 0.0 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Total Travel Time, Tc 146.80 min 4 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Hyd. No. 2 Mining Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 5 yrs = 2 min = 44.010 ac = 0.0 % = TR55 = 2.29 in = 24 hrs Peak discharge = 34.92 cfs Time to peak = 734 min Hyd. volume = 154,571 cuft Curve number = 84* Hydraulic length = 0 ft Time of conc. (Tc) = 32.30 min Distribution = Type II Shape factor = 484 * Composite (Area/CN) = [(33.400 x 89) + (0.510 x 100) + (3.900 x 49) + (6.200 x 80)] / 44.010 Q (cfs) 35.00 30.00 25.00 20.00 15.00 10.00 5.00 0.00 Mining Hyd. No. 2 -- 5 Year 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 2 Q (cfs) 35.00 30.00 25.00 20.00 15.00 10.00 5.00 Time (min) 5 TR55 Tc Worksheet Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. 2 Mining Description Sheet Flow Manning's n -value Flow length (ft) Two-year 24 -hr precip. (in) Land slope (%) A B C Totals = 0.011 = 0.0 = 0.00 = 0.00 0.011 0.0 0.00 0.00 0.011 0.0 0.00 0.00 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Shallow Concentrated Flow Flow length (ft) = 295.00 0.00 0.00 Watercourse slope (%) = 0.01 0.00 0.00 Surface description = Unpaved Paved Paved Average velocity (ft/s) =0.15 0.00 0.00 Travel Time (min) = 32.30 + 0.00 + 0.00 = 32.30 Channel Flow X sectional flow area (sqft) Wetted perimeter (ft) Channel slope (%) Manning's n -value Velocity (ft/s) = 0.00 = 0.00 = 0.00 = 0.015 =0.00 0.00 0.00 0.00 0.015 0.00 0.00 0.00 0.00 0.015 0.00 Flow length (ft) ({0})0.0 0.0 0.0 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Total Travel Time, Tc 32.30 min 6 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Hyd. No. 3 Reclamation Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 5 yrs = 2 min = 44.000 ac = 0.0 % = TR55 = 2.29 in = 24 hrs Peak discharge = 53.17 cfs Time to peak = 732 min Hyd. volume = 229,741 cuft Curve number = 91* Hydraulic length = 0 ft Time of conc. (Tc) = 32.30 min Distribution = Type II Shape factor = 484 Composite (Area/CN) = [(30.800 x 100) + (3.100 x 80) + (3.900 x 49) + (6.200 x 80)] / 44.000 Q (cfs) 60.00 50.00 40.00 30.00 20.00 10.00 0.00 Reclamation Hyd. No. 3 -- 5 Year 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) Hyd No. 3 Q (cfs) 60.00 50.00 40.00 30.00 20.00 10.00 7 TR55 Tc Worksheet Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. 3 Reclamation Description Sheet Flow Manning's n -value Flow length (ft) Two-year 24 -hr precip. (in) Land slope (%) A B C Totals = 0.011 = 0.0 = 0.00 = 0.00 0.011 0.0 0.00 0.00 0.011 0.0 0.00 0.00 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Shallow Concentrated Flow Flow length (ft) = 295.00 0.00 0.00 Watercourse slope (%) = 0.01 0.00 0.00 Surface description = Unpaved Paved Paved Average velocity (ft/s) =0.15 0.00 0.00 Travel Time (min) = 32.30 + 0.00 + 0.00 = 32.30 Channel Flow X sectional flow area (sqft) Wetted perimeter (ft) Channel slope (%) Manning's n -value Velocity (ft/s) = 0.00 = 0.00 = 0.00 = 0.015 =0.00 0.00 0.00 0.00 0.015 0.00 0.00 0.00 0.00 0.015 0.00 Flow length (ft) ({0})0.0 0.0 0.0 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Total Travel Time, Tc 32.30 min 8 Hydrograph Summary Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to Peak (min) Hyd. volume (cuft) Inflow hyd(s) Maximum elevation (ft) Total strge used (cuft) Hydrograph Description 1 SCS Runoff 22.10 2 804 293,712 -- — — Baseline 2 SCS Runoff 110.12 2 732 476,024 -- — -- Mining 3 SCS Runoff 132.76 2 732 587,562 -- -- Reclamation C:\Users\Sydney\GLA Dropbox\Sydney ConnoRAIsph pdcilete rcovich\Atfoi?JAp\BCydrbgftjl8t.gpw 9 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Hyd. No. 1 Baseline Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 100 yrs = 2 min = 43.900 ac = 0.0 % = TR55 = 4.64 in = 24 hrs Peak discharge = 22.10 cfs Time to peak = 804 min Hyd. volume = 293,712 cuft Curve number = 71* Hydraulic length = 0 ft Time of conc. (Tc) = 146.80 min Distribution = Type II Shape factor = 484 * Composite (Area/CN) = [(0.900 x 100) + (2.300 x 30) + (11.600 x 49) + (5.000 x 89) + (21.900 x 80) + (2.200 x 86)] / 43.900 Baseline Q (cfs) Hyd. No. 1 -- 100 Year Q (cfs) 24.00 20.00 16.00 12.00 8.00 4.00 0.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 1680 Hyd No. 1 24.00 20.00 16.00 12.00 8.00 4.00 Time (min) 10 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Hyd. No. 2 Mining Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 100 yrs = 2 min = 44.010 ac = 0.0 = TR55 = 4.64 in = 24 hrs Peak discharge = 110.12 cfs Time to peak = 732 min Hyd. volume = 476,024 cuft Curve number = 84* Hydraulic length = 0 ft Time of conc. (Tc) = 32.30 min Distribution = Type II Shape factor = 484 * Composite (Area/CN) = [(33.400 x 89) + (0.510 x 100) + (3.900 x 49) + (6.200 x 80)) / 44.010 Mining Q (cfs) Hyd. No. 2 -- 100 Year Q (cfs) 120.00 100.00 80.00 60.00 40.00 20.00 0.00 0 120 240 360 480 600 720 840 Hyd No. 2 120.00 100.00 80.00 60.00 40.00 20.00 0.00 960 1080 1200 1320 1440 1560 Time (min) 11 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Hyd. No. 3 Reclamation Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 100 yrs = 2 min = 44.000 ac = 0.0 % = TR55 = 4.64 in = 24 hrs Peak discharge = 132.76 cfs Time to peak = 732 min Hyd. volume = 587,562 cuft Curve number = 91* Hydraulic length = 0 ft Time of conc. (Tc) = 32.30 min Distribution = Type II Shape factor = 484 * Composite (Area/CN) = [(30.800 x 100) + (3.100 x 80) + (3.900 x 49) + (6.200 x 80)] / 44.000 Q (cfs) 140.00 120.00 100.00 80.00 60.00 40.00 20.00 0.00 Reclamation Hyd. No. 3 -- 100 Year 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) Hyd No. 3 Q (cfs) 140.00 120.00 100.00 80.00 60.00 40.00 20.00 12 Hydraflow Rainfall Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Return Period (Yrs) Intensity -Duration -Frequency Equation Coefficients (FHA) B D E (N/A) 1 0.0000 0.0000 0.0000 -- 2 69.8703 13.1000 0.8658 -- 3 0.0000 0.0000 0.0000 -- 5 79.2597 14.6000 0.8369 -- 10 88.2351 15.5000 0.8279 25 102.6072 16.5000 0.8217 50 114.8193 17.2000 0.8199 100 127.1596 17.8000 0.8186 File name: SampleFHA.idf Intensity = B / (Tc + D)AE Return Period Intensity Values (in/hr) 5 min 10 15 20 25 30 35 40 45 50 55 60 (Yrs) 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2 5.69 4.61 3.89 3.38 2.99 2.69 2.44 2.24 2.07 1.93 1.81 1.70 3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5 6.57 5.43 4.65 4.08 3.65 3.30 3.02 2.79 2.59 2.42 2.27 2.15 10 7.24 6.04 5.21 4.59 4.12 3.74 3.43 3.17 2.95 2.77 2.60 2.46 25 8.25 6.95 6.03 5.34 4.80 4.38 4.02 3.73 3.48 3.26 3.07 2.91 50 9.04 7.65 6.66 5.92 5.34 4.87 4.49 4.16 3.88 3.65 3.44 3.25 100 9.83 8.36 7.30 6.50 5.87 5.36 4.94 4.59 4.29 4.03 3.80 3.60 Tc = time in minutes. Values may exceed 60. Precip. file name: C:\Users\Svdnev\Dropbox (GLA)\Elam \Delta Paving\AutoCAD\Hvdroloav\Precioitation.oc Storm Distribution Rainfall Precipitation Table (in) 1-yr 2-yr 3-yr 5-yr 10-yr 25-yr 50-yr 100-yr SCS 24 -hour 0.00 0.00 0.00 2.29 2.74 3.43 4.01 4.64 SCS 6 -Hr 0.00 0.00 0.00 1.61 1.99 2.60 3.13 3.73 Huff -1st 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff -2nd 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff -3rd 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff -4th 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-Indy 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Custom 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Appendix G-2 Groundwater Quality Monitoring Plan Marcovich Gravel Pit May 2024 QLewicki & Associates aJ U 0 aJ dA C .C s U 0 U Cco C CC C 0 m E O w C C O O U LA C 0 U al C O C 0 Groundwater Well Elevations June 2023 - April 2024 (To -Date) v'rn o r. 0o L.n 1° O O m• v m to 0 0 Ol Ol C LO 0 C 0 U 7 C 0 U 3 2 GW Elev. (ft amsl) Baseline Collection Period: June 2023 through June 2024 4903.27 4901.85 4901.15 4900.99 I 4901.20 to 00 0 o cm v 4900.67 4900.42 4900.48 4901.07 wi up 0 o rn v 4903.27 4900.42 I Lt) 00 N J p0 -a N $+ N 111 Ni d' al m 4.64 O Ol 00 In 4 v m Ol v N .--1 L!1 r, m Ln r-1 N m N. Ln 4 00 ri Ln 2.52 5.37 U J$ N. l0 L11 0l O N Ol N N in Ol N cr co N. r- O N N 00 00 N 111 co l0 4 00 N m 00 m N 00 5.67 N V1 00 2 GW Elev. (ft amsl) 4904.02 4903.61 4903.01 4902.63 4902.97 4902.65 4902.38 C1 C1 ri Cl co C1 wii 0l 4902.26 4901.99 4904.02 00 C1 .-i 0 C1 v o N 3 00 Vf •r in N m to r1 v to N 4 .--I 111 O N O CO .--I CO C 111 Ln - CO N Lri Cl N L!1 .--1 00 Lrl N Ln Ln 3.75 5.79 SWL TOC (ft) Ol O O in O l0 lD NZ N 00 c l0 Ol l0 O1 N N N I m N (xi c•-•4 m Lfl l0 1.0 Cr) 00.00 00 I N lD 00 6.59 m (.0 00 Month & Year June 2023 July 2023 August 2023 September 2023 October 2023 November 2023 December 2023 January 2024 February 2024 March 2024 April 2024 Groundwater Elevation (High) Groundwater Elevation (Low) GW Elevation Difference (ft) = a O z a) U O 00 C) O 00 CC amsl = above mean sea level SWL = Static Water Level TOC = Top of Casing G.) U s- 0 CC 00 2 S U O U CS co C N (S L al CO C 7 O w '-I al CO z VI O co C 01 a� f0 z E a) C Lowest INS Tables 1 - 4 Groundwater Quality Standards N p G O O N p O 0.75 p a 250 0 O 0 N 0 N O O 0 N N O 0 N 0 0 O 0 r 0.02 O O N N p O 1.25 x Background O 0 '. 0 N • pH -- mg/L -- 6.5 - 8.5 6.5 - 8.5 -- 6.5 - 8.5 INS Table 4 TDS Water Quaky Standards Based on Result INS Table 3 Agricultural Standards 0 0 0.75 0 O 0.05 N O N ,- O LU N N O N 0 0 O O N O 0 N INS Table 2 Domestic Water Supply: Drinking Water Standards 250 0 0.05 O INS Table 1 Domestic Water Supply: Human Health Standards o O N O 0.005 V 005 0 0 0.05 0.05 0.002 0.03 mg/L mg/L mg/L E 0 E L_ ,5w E mg/L I-----mg/L -.--_ E E mg/L mg/L mg/L E mg/L mg/L mg/L mg/L E mg/L mg/L mg/L mg/L mg/L mg/L mg/L E mg/L CAS No. 7429-90-5 7440-36-0 7440-38-2 I 7440-39-3 7440-41-7 co m IT W 7440-47-3 _. Q o o 7440-50-8 co m 0 y 7439-92-1 I 7439-93-2 1 (0 o0 7439-98-7 7440-02-0 14797-55-8 14797-65-0 N 7440-22-4 m 7440-28-0 o 4 7440-62-2 (D 0 tt (Aluminum O a Arsenic 'Barium 2 m Boron 1 Cadmium Chloride Chromium (Total) [Cr(III) + Cr(VI)) Cobalt 'Copper IFlounde 1 J E Manganese Molybdenum [Nickel Nitrate (NO3) Nitrite (N02) Nitrate -Nitrite, Total (NO2 +NO3) Selenium Silver Sulfate Thallium Total Dissolved Solids (TDS) 1 Uranium Vanadium N = Lowest INS Table 1 - 4 Standard 0 0 v 0 0 0 0 a` O m 0 O. •O v `o E 0 c E n 3 v � o 0 0 Y o v � v °1 .. v W X � W y y E E a INS Table 4 None INS Table 3 Mercury INS Table 2 Chlorophenol Color Corrosivity Foaming Agents Odor O 0 a INS Table 1 Total Coliforms (30 day average) I Total Coliforms (max in 30 days) I 0 Cyanide [Free] Mercury Gross Alpha Particle Activity Beta and Photon Emitters U1 a 4th Quarter Background Sampling Event Iradient MW -2D .0 maE a s 888o8'o8g1888�8.'8 00 0 0. 0 0 0 0 88�0�80E8 0 888 o o ft5 a o m 88^8o8g888.`8§888828888 .....°0 S c O 0 mfm�� > 8188o1i!o8�E88,Eg8ESB.-o.-g8�8� o 0 0 o a 0 o o 0 0 o 3rd Quarter Background Sampling Event Down -gradient MW -2 c �E 888r'S'48 8§8Zg8E'888V o�$8�§888, I 0 O , c U O `-'o 88go'g.oSQ88�Ee2g88^'o o 0 0o io 0 0 0 -0c 00.- 8,gti8�8E8 io N •- 0 n E 12/14/2023 Grab mg/L 88E gg E o i> 0 0"e818§8::'' Ln o,o�g�a� . 0 o E 2nd Quarter Background Sampling Event Iradient MW -2D 9/27/2023 QNQC mg/L 8§§I: > > 0,xO , og,888".2, 0 0 > > 858888,^',•, � � gmo88 ^ 0. 7.3 I 7.0 7.0 ' o ry 9/27/2023 Grab mg/L g E E1 o 8 o > 8 o 18 1.7§ 47"7M ? 8 0 8 8" 0 0 0 8 8 ti 0 0 8 8 0 o ALn 80'8'080 o a I- 0 c B c 88"Ig o 80088 0 .. O 0 88°88.688 0 .-0.= 1st Quarter Background Sampling Event Down -gradient MW -2 6/30/2023 6/30/2023 6/30/2023 Grab QA/QC Grab mg/L mg/L mg/L 0.017 1 0.019 I 0.015 <88mgoogo 0 i 0 0 c N o 0 0 0 msIg No 088 ... '' E o g o 518 .000-TjE S8 0 E S!,? 0 8 8 m m N o o E a Sample Event: Well Type: Sample ID: Date: Type: Units E E E E E EI E_ E E E E_ E` E\_ c E E E E'' E E E E E a i 8 0^ Dim Analyte/Parameters E << r <Im E U UiUU E _ U _ E 0 z z z E O Z 7. 0 , EI - z �n'N E - >> �. n is l 25 times the b 10,000 mg/L, the Maxlmunt Allowable I OS Co Appendix G-3 Groundwater Model Marcovich Gravel Pit May 2024 IlLewicki & Associates EXHIBIT H WILDLIFE INFORMATION 1. Introduction Given the location of the Marcovich Mining Resource just south of Fort Lupton, adjacent to the highway, and surrounded by an abundance of gravel pits and agricultural fields, it is safe to assume that wildlife habitat fragmentation has already occurred. Colorado Parks and Wildlife (CPW) habitat and range mapping has been used to develop this wildlife analysis. The CPW will be consulted as part of the mine permitting process. 2. Description of Significant Wildlife Resources on the Affected Land The affected land is within seasonal and general range of a few non -endangered species. There are no bald eagle nests within 5,000 feet of the site, but the site is considered part of a few bald eagle ranges: summer forage, winter forage, and winter concentration. The affected area is within the mule deer corridor and their severe and normal winter range. The site is not near any mule deer migration corridors or highway crossings. The site is also within the white-tailed deer concentration area and winter range. 3. Seasonal Use of the Area Bald eagles make use of the site as summer and winter forage, as well as a winter concentration area. Mule deer and white-tailed deer use the site as winter range. All other significant wildlife resources are year-round in their usage. 4. Presence and Estimated Population of Threatened or Endangered Species No federally listed threatened and endangered species and/or habitat were identified on the or immediately surrounding the affected land. 5. Effect of Proposed Operation on Existing Wildlife Impacts on wildlife use from the proposed project would include direct temporary elimination of potential habitat within the affected area during mining, and temporary localized displacement associated with additional noise and lighting from the proposed project. This localized loss of habitat would not disrupt regional migration or significant movement patterns and would not threaten the overall health and viability of any species. Nearby lands are also disturbed for Marcovich Gravel Pit May 2024 H-1 Lewicki & Associates similar uses, and as such, the Marcovich Mining Resource will not cause a significant impact on the local area's wildlife habitat. The affected area will be fully reclaimed at the conclusion of mining which will restore some degree of wildlife habitat over time. Concurrent reclamation and phased mining will also help to reduce the total impact on wildlife. Transformation of the bulk of the agricultural fields onsite into water storage ponds will be a permanent change in overall habitat. 6. Impacts to Fish Mining will not take place in any water ways or natural lakes. Surface water controls will protect offsite drainages and fish habitats from sediment discharges. Asphalt Specialties will not stock the reclaimed lake with non-native species at any time. Marcovich Gravel Pit May 2024 H-2 II Lewicki 8i Associates EXHIBIT I 1. General SOILS INFORMATION A soil report was generated using the United States Department of Agriculture's NRCS Web Soil Survey (WSS)3 and is included in this exhibit as Appendix I-1 at the end of this exhibit. The WSS provides soil data and information produced by the National Cooperative Soil Survey. The majority of the site's soil consists of aquolls and aquents with a gravelly substratum in the eastern area, and the Ellicott -Ellicott sandy skeletal complex in the western area along the river (see Map C-1). The A -horizon of the soil profile was used as the basis for determining the topsoil stripping depth during mining operations. These primary soil types that exist at the site are described as follows. 2. Suitability for Reclamation Revegetation The two main soil types provide an average of two feet of suitable material for revegetation. The soil in the east (3-Aquolls and Aquents) is not considered prime farmland, but the soil in the west (10 -Ellicott -Ellicott sandy -skeletal complex) is considered prime farmland if irrigated. As the majority of the site will be reclaimed to a pond, converting the land back to agriculture is not considered for reclamation. However, the soil should be suitable to be used for rangeland as portions of the site currently are rangeland. Revegetating disturbances as rangeland will also complement the reclaimed land use of open space. 3. Soil Type Descriptions 3—Aquolls and Aquents, gravelly substratum Map Unit Setting National map unit symbol: 3627 Elevation: 4,000 to 7,200 feet Mean annual precipitation: 12 to 18 inches Mean annual air temperature: 45 to 55 degrees F Frost -free period: 80 to 155 days Farmland classification: Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Map Unit Composition Aquolls and similar soils:55 percent Aquents, gravelly substratum, and similar soils:30 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Aquolls Setting Landform: Swales, flood plains, streams Down -slope shape: Linear Marcovich Gravel Pit May 2024 1-1 Lewicki & Associates Across -slope shape: Linear Parent material: Recent alluvium Typical profile H1- 0 to 48 inches: loam H2 - 48 to 60 inches: gravelly sand Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high (0.20 to 2.00 in/hr) Depth to water table: About 6 to 48 inches Frequency of flooding: FrequentNone Frequency of ponding: None Maximum salinity: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 8.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6w Hydrologic Soil Group: D Ecological site: R067BY035CO - Salt Meadow Hydric soil rating: Yes Description of Aquents, Gravelly Substratum Setting Landform:S tream terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Recent alluvium Typical profile H1 - 0 to 48 inches: variable H2 - 48 to 60 inches: very gravelly sand Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat):Moderately high to very high (0.57 to 19.98 in/hr) Depth to water table: About 6 to 24 inches Frequency of flooding: Frequent None Frequency of ponding: None Calcium carbonate, maximum content:10 percent Maximum salinity: Nonsaline to moderately saline (0.0 to 8.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.6 inches) Interpretive groups Land capability classification (irrigated): 6w Land capability classification (nonirrigated): 6w Hydrologic Soil Group: D Ecological site: R067BY035CO - Salt Meadow Hydric soil rating: Yes Minor Components Bankard Percent of map unit:10 percent Hydric soil rating: No Ustic torrifluvents Marcovich Gravel Pit May 2024 1-2 0 Lcwicki & Associates Percent of map unit:5 percent Hydric soil rating: No 10 —Ellicott -Ellicott sandy -skeletal complex, 0 to 3 percent slopes, rarely flooded Map Unit Setting National map unit symbol: 2xsth Elevation: 3,950 to 5,960 feet Mean annual precipitation: 13 to 17 inches Mean annual air temperature: 50 to 54 degrees F Frost -free period: 135 to 165 days Farmland classification: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Ellicott, rarely flooded, and similar soils:65 percent Ellicott sandy -skeletal, rarely flooded, and similar soils:25 percent Minor components:10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ellicott, Rarely Flooded Setting Landform: Drainageways, flood plains on intermittent streams Down -slope shape: Linear Across -slope shape: Concave Parent material: Noncalcareous, stratified sandy alluvium Typical profile A - 0 to 4 inches: sand AC - 4 to 13 inches: sand Cl - 13 to 30 inches: sand C2 - 30 to 44 inches: sand C3 - 44 to 80 inches: coarse sand Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat):High to very high (13.00 to 39.96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: Rare Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Very low (about 2.1 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 7s Hydrologic Soil Group: A Ecological site: R067BY031 CO - Sandy Bottomland Hydric soil rating: No Description of Ellicott Sandy -skeletal, Rarely Flooded Setting Landform: Channels on drainageways, channels on intermittent streams Down -slope shape: Linear Across -slope shape: Concave, linear Parent material: Noncalcareous, stratified sandy alluvium Typical profile A - 0 to 4 inches: very gravelly coarse sand Marcovich Gravel Pit May 2024 1-3 Lewicki & Associates AC - 4 to 13 inches: very gravelly sand Cl - 13 to 30 inches: very gravelly sand C2 - 30 to 44 inches: very gravelly sand C3 - 44 to 80 inches: very gravelly coarse sand Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat):High to very high (13.00 to 39.96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: Rare Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Very low (about 1.2 inches) Interpretive groups Land capability classification (irrigated): 4s Land capability classification (nonirrigated): 8s Hydrologic Soil Group: A Ecological site: R067BY031 CO - Sandy Bottomland Hydric soil rating: No Minor Components Haverson Percent of map unit.:10 percent Landform: Terraces Landform position (three-dimensional):Tread Down -slope shape: Linear Across -slope shape: Linear Ecological site: R067BY036CO - Overflow Hydric soil rating: No Marcovich Gravel Pit May 2024 1-4 Lewicki & Associates Appendix I-1 Soil Report Marcovich Gravel Pit May 2024 1-5 Ill Lewicki & Associates USDA United States Department of Agriculture Natural Resources Conservation Service A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Weld County, Colorado, Southern Part February 27, 2024 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments ) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center ( ) or your NRCS State Soil Scientist ( -, ). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents Preface 2 How Soil Surveys Are Made 5 Soil Map 8 Soil Map 9 Legend 10 Map Unit Legend 11 Map Unit Descriptions 11 Weld County, Colorado, Southern Part 13 1—Altvan loam, 0 to 1 percent slopes 13 3—Aquolls and Aquents, gravelly substratum 14 10 —Ellicott -Ellicott sandy -skeletal complex, 0 to 3 percent slopes, rarely flooded 16 19 —Colombo clay loam, 0 to 1 percent slopes 18 21—Dacono clay loam, 0 to 1 percent slopes 19 29—Julesburg sandy loam, 0 to 1 percent slopes 20 75 —Vona sandy loam, 0 to 1 percent slopes 21 76 —Vona sandy loam, 1 to 3 percent slopes 23 85 —Water 24 References 25 4 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil -vegetation -landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil 5 Custom Soil Resource Report scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research. The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas. Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil -landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil -landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape. Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field -observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil. Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date. After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and 6 Custom Soil Resource Report identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately. 7 Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 8 Custom Soil Resource Report MAP INFORMATION MAP LEGEND (a a) a) a co E d 3 0 0 p T a) .c a) O U N T 0 J _co O O N O N � r N d •O M O U) C M Soil Map may not be valid at this scale. C C Very Stony Spot 0 a� _ `m O Q `o a7 2 Q C 0 a 'O < (/) Soil Map Unit Polygons d O a) N _N .(a J o O „ a O C U 0 a) mj a m E m C U m a m 0 p m E m N 3 C) a) 0 o c w a)a>w m oL C 0 m L a) E N 2, w 0 C > m o a' co o4.4 aa)pQ_0 Lp CU O N E 0 O 0 ECE- ti C m a) u) o N Ea) E U -0 m ma C a a) `1.) _ a) C ca WE.COOU Soil Map Unit Lines a) 0 Soil Map Unit Points 0 Special Line Features Water Features '0 m Streams and Canals N 041- 8 a) co C co U NU) cL co a) a a) a) ° a) C t a) 3 C 0` a g 0 "0 m (a I N J C m Z N J E w d N No C o)E E 41 ≥ N '__ -E E a N _ a) m a) a) m OmE O OLo _a co a) ` ti a Cn 7 E C N.0 N a) m co 0 N J N () O M 0 0 w ,0 C O M C m p N 2 N -') a) a( N la N Z co 3 "O U EO N 'O m o d N -0 N a m Q m o m au E U W m 0 N p N @` m a) 9 dL co Cl) C.Ja) N 0<� o m Ucoo '� L C O a) •U Q CO co d10 -0 y m o 0 i �... o m Y o >; n o m0 E C 4) c V U C N N O E co y O N O C E O J N N L E a) O N 'O . a) wa O` . O C a N n ar. a 0 E m°�� U a) Cn O O p_ -p 'O CO "O .N.. N N .D N C ON N O 0 0.'U o N N >a) m a) a) '.� O J (n N C N > L c 9 (1 .0 8 Q O C N N COm a) O O m ZEE 0amm.o 0°) m a� co mac .0 T( 2 t a) n, m C) m 'CO a) O a) J Vi d O N V (0 m J to 'O m (a E O 'O (, o. coc mZ0 Y .o 0 c Q� .N m oDQm T �_ J C To O T N a m _ E E co J.` 0 7`0 mE E N 0- m O 00 a) U O O Z Q CL OCD co a O O C _ > m O N N CU U (� -p y 0 c (n m a a) C a) E O N o• Q O C m CO .a d .a) W a) J N L = — O (Cl 0.1 a o o)so 2 n'5Q m H o cnv) o) - omoN H 8.E N Transportation N 0 a o o U) T m U aX Interstate Highways Closed Depression a CD h 0 0 0. O 2 Gravelly Spot Local Roads O a > C > co co J C C O C m Aerial Photography Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop 0 U)) c U) J_ 0 -c U) Severely Eroded Spot IL 0 (n O U) Custom Soil Resource Report Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 1 Altvan loam, 0 to 1 percent slopes 131.0 19.6% 3 Aquolls and Aquents, gravelly substratum 290.3 43.5% 10 Ellicott -Ellicott sandy -skeletal complex, 0 to 3 percent slopes, rarely flooded 156.5 23.5% 19 Colombo day loam, 0 to 1 percent slopes 1.1 0.2% 21 Dacono clay loam, 0 to 1 percent slopes 22.0 3.3% 29 Julesburg sandy loam, 0 to 1 percent slopes 6.8 1.0% 75 Vona sandy loam, 0 to 1 percent slopes 13.4 2.0% 76 Vona sandy loam, 1 to 3 percent slopes 25.8 3.9% 85 Water 19.8 3.0% Totals for Area of Interest 666.8 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, 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 dominant 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 for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They 11 Custom Soil Resource Report generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha -Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha -Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. 12 Custom Soil Resource Report Weld County, Colorado, Southern Part 1—Altvan loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 361j Elevation: 4,500 to 4,900 feet Mean annual precipitation: 14 to 16 inches Mean annual air temperature: 46 to 48 degrees F Frost -free period: 130 to 150 days Farmland classification: Not prime farmland Map Unit Composition Altvan and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Altvan Setting Landform: Terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Old alluvium Typical profile H1 - 0 to 10 inches: loam H2 - 10 to 25 inches: clay loam H3 - 25 to 60 inches: gravelly sand Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.20 to 2.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 5 percent Available water supply, 0 to 60 inches: Low (about 5.7 inches) Interpretive groups Land capability classification (irrigated): 3s Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: R067BY002CO - Loamy Plains Hydric soil rating: No Minor Components Cascajo Percent of map unit: 9 percent Hydric soil rating: No 13 Custom Soil Resource Report Aquic haplustolls Percent of map unit: 1 percent Landform: Swales Hydric soil rating: Yes 3—Aquolls and Aquents, gravelly substratum Map Unit Setting National map unit symbol: 3627 Elevation: 4,000 to 7,200 feet Mean annual precipitation: 12 to 18 inches Mean annual air temperature: 45 to 55 degrees F Frost -free period: 80 to 155 days Farmland classification: Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Map Unit Composition Aquolls and similar soils: 55 percent Aquents, gravelly substratum, and similar soils: 30 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Aquolls Setting Landform: Swales, streams, flood plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Recent alluvium Typical profile H1 - 0 to 48 inches: loam H2 - 48 to 60 inches: gravelly sand Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.20 to 2.00 in/hr) Depth to water table: About 6 to 48 inches Frequency of flooding: Frequent Frequency of ponding: None Maximum salinity: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 8.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6w 14 Custom Soil Resource Report Hydrologic Soil Group: D Ecological site: R067BY035CO - Salt Meadow Hydric soil rating: Yes Description of Aquents, Gravelly Substratum Setting Landform: Stream terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Recent alluvium Typical profile HI - 0 to 48 inches: variable H2 - 48 to 60 inches: very gravelly sand Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat): Moderately high to very high (0.57 to 19.98 in/hr) Depth to water table: About 6 to 24 inches Frequency of flooding: Frequent Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline to moderately saline (0.0 to 8.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.6 inches) Interpretive groups Land capability classification (irrigated): 6w Land capability classification (nonirrigated): 6w Hydrologic Soil Group: D Ecological site: R067BY035CO - Salt Meadow Hydric soil rating: Yes Minor Components Bankard Percent of map unit: 10 percent Hydric soil rating: No Ustic torrifluvents Percent of map unit: 5 percent Hydric soil rating: No Custom Soil Resource Report 10 —Ellicott -Ellicott sandy -skeletal complex, 0 to 3 percent slopes, rarely flooded Map Unit Setting National map unit symbol: 2xsth Elevation: 3,950 to 5,960 feet Mean annual precipitation: 13 to 17 inches Mean annual air temperature: 50 to 54 degrees F Frost -free period: 135 to 165 days Farmland classification: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Ellicott, rarely flooded, and similar soils: 65 percent Ellicott sandy -skeletal, rarely flooded, and similar soils: 25 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ellicott, Rarely Flooded Setting Landform: Flood plains on intermittent streams, drainageways Down -slope shape: Linear Across -slope shape: Concave Parent material: Noncalcareous, stratified sandy alluvium Typical profile A - 0 to 4 inches: sand AC - 4 to 13 inches: sand C1- 13 to 30 inches: sand C2 - 30 to 44 inches: sand C3 - 44 to 80 inches: coarse sand Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat): High to very high (13.00 to 39.96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: Rare Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Very low (about 2.1 inches) Interpretive groups Land capability classification (irrigated): 4e 16 Custom Soil Resource Report Land capability classification (nonirrigated): 7s Hydrologic Soil Group: A Ecological site: R067BY031CO - Sandy Bottomland Hydric soil rating: No Description of Ellicott Sandy -skeletal, Rarely Flooded Setting Landform: Channels on intermittent streams, channels on drainageways Down -slope shape: Linear Across -slope shape: Concave, linear Parent material: Noncalcareous, stratified sandy alluvium Typical profile A - 0 to 4 inches: very gravelly coarse sand AC - 4 to 13 inches: very gravelly sand Cl - 13 to 30 inches: very gravelly sand C2 - 30 to 44 inches: very gravelly sand C3 - 44 to 80 inches: very gravelly coarse sand Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat): High to very high (13.00 to 39.96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: Rare Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Very low (about 1.2 inches) Interpretive groups Land capability classification (irrigated): 4s Land capability classification (nonirrigated): 8s Hydrologic Soil Group: A Ecological site: R067BY031CO - Sandy Bottomland Hydric soil rating: No Minor Components Haverson Percent of map unit: 10 percent Landform: Terraces Landform position (three-dimensional): Tread Down -slope shape: Linear Across -slope shape: Linear Ecological site: R067BY036CO - Overflow Hydric soil rating: No 17 Custom Soil Resource Report 19 —Colombo clay loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 361 v Elevation: 4,600 to 4,780 feet Mean annual precipitation: 12 to 16 inches Mean annual air temperature: 48 to 52 degrees F Frost -free period: 130 to 160 days Farmland classification: Prime farmland if irrigated Map Unit Composition Colombo and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Colombo Setting Landform: Terraces, flood plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Stratified, calcareous alluvium Typical profile H1 - 0 to 14 inches: clay loam H2 - 14 to 21 inches: stratified loam to clay loam H3 - 21 to 60 inches: stratified sand to loam to clay loam Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.60 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: High (about 9.4 inches) Interpretive groups Land capability classification (irrigated): 1 Land capability classification (nonirrigated): 3e Hydrologic Soil Group: C Ecological site: R067BY042CO - Clayey Plains Hydric soil rating: No 18 Custom Soil Resource Report Minor Components Nunn Percent of map unit: 5 percent Hydric soil rating: No Heldt Percent of map unit: 5 percent Hydric soil rating: No Dacono Percent of map unit: 5 percent Hydric soil rating: No 21—Dacono clay loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 361y Elevation: 4,550 to 4,970 feet Mean annual precipitation: 14 to 18 inches Mean annual air temperature: 48 to 52 degrees F Frost -free period: 140 to 160 days Farmland classification: Prime farmland if irrigated Map Unit Composition Dacono and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Dacono Setting Landform: Terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Mixed alluvium Typical profile H1 - 0 to 12 inches: clay loam H2 - 12 to 21 inches: clay loam H3 - 21 to 27 inches: clay loam H4 - 27 to 60 inches: very gravelly sand Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.60 in/hr) Depth to water table: More than 80 inches 19 Custom Soil Resource Report Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 15 percent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.3 inches) Interpretive groups Land capability classification (irrigated): 2s Land capability classification (nonirrigated): 3s Hydrologic Soil Group: C Ecological site: R067BY042CO - Clayey Plains Hydric soil rating: No Minor Components Heldt Percent of map unit: 5 percent Hydric soil rating: No Nunn Percent of map unit: 5 percent Hydric soil rating: No Altvan Percent of map unit: 5 percent Hydric soil rating: No 29—Julesburg sandy loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 3626 Elevation: 4,700 to 4,800 feet Mean annual precipitation: 15 to 19 inches Mean annual air temperature: 48 to 52 degrees F Frost -free period: 145 to 155 days Farmland classification: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Julesburg and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Julesburg Setting Landform: Terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: South platte river alluvium 20 Custom Soil Resource Report Typical profile H1 - 0 to 12 inches: sandy loam H2 - 12 to 27 inches: sandy loam H3 - 27 to 60 inches: sand Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High (2.00 to 6.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water supply, 0 to 60 inches: Moderate (about 6.5 inches) Interpretive groups Land capability classification (irrigated): 2s Land capability classification (nonirrigated): 3e Hydrologic Soil Group: A Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No Minor Components Edgar Percent of map unit: 4 percent Hydric soil rating: No Remmit Percent of map unit: 4 percent Hydric soil rating: No Valent Percent of map unit: 4 percent Hydric soil rating: No Vona Percent of map unit: 3 percent Hydric soil rating: No 75 —Vona sandy loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 363v Elevation: 4,650 to 4,950 feet Mean annual precipitation: 13 to 15 inches Mean annual air temperature: 48 to 55 degrees F Frost -free period: 130 to 160 days Farmland classification: Farmland of statewide importance 21 Custom Soil Resource Report Map Unit Composition Vona and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Vona Setting Landform: Terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Alluvium Typical profile H1 - 0 to 6 inches: sandy loam H2 - 6 to 28 inches: fine sandy loam H3 - 28 to 60 inches: sandy loam Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 6.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 15 percent Maximum salinity: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.8 inches) Interpretive groups Land capability classification (irrigated): 3e Hydrologic Soil Group: A Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No Minor Components Remmit Percent of map unit: 11 percent Hydric soil rating: No Olney Percent of map unit: 4 percent Hydric soil rating: No 22 Custom Soil Resource Report 76 —Vona sandy loam, 1 to 3 percent slopes Map Unit Setting National map unit symbol: 363w Elevation: 4,600 to 5,200 feet Mean annual precipitation: 13 to 15 inches Mean annual air temperature: 48 to 55 degrees F Frost -free period: 130 to 160 days Farmland classification: Farmland of statewide importance Map Unit Composition Vona and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Vona Setting Landform: Terraces, plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Alluvium and/or eolian deposits Typical profile H1 - 0 to 6 inches: sandy loam H2 - 6 to 28 inches: fine sandy loam H3 - 28 to 60 inches: sandy loam Properties and qualities Slope: 1 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 6.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 15 percent Maximum salinity: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.8 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: A Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No 23 Custom Soil Resource Report Minor Components Remmit Percent of map unit: 9 percent Hydric soil rating: No Olney Percent of map unit: 3 percent Hydric soil rating: No Julesburg Percent of map unit: 3 percent Hydric soil rating: No 85 —Water Map Unit Composition Water- 95 percent Minor components: 5 percent Estimates are based on observations, descriptions, and transects of the mapunit. Minor Components Aquolls Percent of map unit: 5 percent Landform: Marshes Hydric soil rating: Yes 24 References American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep -water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States. National Research Council. 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. 25 Custom Soil Resource Report United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430 -VI. United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. 26 EXHIBIT J VEGETATION INFORMATION 1. Existing Vegetation Community The native vegetation at the Marcovich Mining Resource is mostly limited to the eastern banks of the Platte River and low-lying areas used for stock watering ponds. The remaining portions of the site are agricultural fields. The native vegetation that is present consists of mature cottonwoods galleries with a shrubby midstory. The understory is predominantly dry grasses and shrubs. Some small portions of the site contain dry rangeland vegetation. The remaining areas of the site are agricultural fields which do not contain native vegetation, and will be removed during mining. The reclamation plan aims to revegetate the site to similar conditions of the existing native rangeland vegetation. Figure J-1 Typical vegetation in river corridor Marcovich Gravel Pit May 2024 J-1 U Lewicki & Associates Figure J-2 Typical rangeland vegetation 2. Wetlands Wetlands identified on the site from the National Wetlands Inventory are shown on Map C-1. A preliminary investigation of wetlands onsite indicates only manmade structures are associated with wetlands. This is limited to a concrete ditch, return irrigation ditch, stock ponds, and a settling pond at the end of the concrete ditch. (see Appendix J-1). A full delineation will be conducted prior to mining in stock ponds area. 3. Estimated Carrying Capacity The final use for the site will be a water storage pond with surrounding rangeland which will serve as open space and public recreation. Since the pond makes up the vast majority of the site area, the rangeland is not anticipated to be used for grazing. Marcovich Gravel Pit May 2024 J-2 0 Lewicki Si Associates Appendix J-1 Wetlands Report Marcovich Gravel Pit May 2024 J-3 ei Lewicki & Associates geosrA� Natural' :�,_ r..� . ,_ � .� ,. l or vren 1797 Trek Trail, Reno, Nevada, 89521 * (775) 287-9038 May 9, 2024 Mr. Greg Geras Land Resource Manager Asphalt Specialties 345 W. 62nd Ave. Denver, Colorado 80216 SUBJECT: REVIEW OF AQUATIC RESOURCES AT THE APPROXIMATE 42 -ACRE PROJECT AREA (MARCOVICH MINE AREA) Dear Mr. Geras, Summary: Attachment 1, Figure la contains a site location map. Also attached is a map that delineates features that would potentially be under US Army Corps of Engineers (USACE) jurisdiction and what I believe are consistent with the proposed Colorado Gap rule and include the South Platte River and the an adjacent pond/impoundment (Attachment 1, Figure 3)'. The pond area is in my opinion connected to the South Platte River through shallow ground water and is therefore indistinguishable from the South Platte River. The area of the pond is approximately one acre. There was no vegetation at the pond boundary or fridge area on my March 31, 2024 site visit. The pond acts as an impoundment of the South Platte River and is therefore potentially subject to USACE/Environmental Protection Agency (EPA) jurisdiction. The older river floodplain, estimated at the 25 -year return interval, is also visible in aerial photos as the Cottonwood canopy and would be an area that should also be avoided by the proposed mining activities unless appropriate permits are procured prior to impacts. As stated during the field visit, only the USACE can determine jurisdiction under Section 404 of the Clean Water Act and any actions or work are conducted at the applicants own risk. It is unknown what affects, if any, the proposed Colorado gap rules may have in the future. Typically, methodologies consistent with the USACE standards/protocols for determining the presence or absence of waters of the United States (WOTUS)/wetland are determinated through field protocols/indicators and would also be consistent under what we believe are protocols for the Colorado gap rule. 'There are draft bills identified and are referred to as 24-1379-McCluskie-McCormick and 2024a-127_01- Kirkmeyer. 2 A) 1987 USACE Wetland Delineation Manual (1987-01, Y-87-1), 143 pages B) Regional Supplement to the Corps of Engineers, Wetland Delineation Manual Great Plains Region Version 2.0, 152 pages USACE ERDC/EL TR-10-3, March 2010, 152 pages D:\273326\AsphaltSpecialities\Letter Opinion\opinion letter final draft r2.wpd 1 Letter Opinion - Review at the Approximate 42 -acre Project Area (Marcovich Mine Area) Page 2 The site contains existing agricultural fields that are proposed for sand mining activities. The goal of this work is to identify areas to avoid for future mining activities and to determine if there are areas that appear as waters of the United States (WOTUS)/wetlands and would need a formal aquatic resources delineation. In order to better understand the irrigation ditches and water movement through the site, I utilized USGS topographic maps, historical aerials, USGS National Hydrography Database (NHD), irrigation maps and watershed boundary lines to assess if any of the ditches are realigned tributaries' (Attachment 1, Figures lb, 2a and 2b). A review of the data found the ditches are not realigned tributaries and that there are no other tributaries within the project area (other than the South Platte River). According to you (the Land Manager), the current irrigation ditches were constructed on uplands to convey supplemental irrigation water for use within the project site4. That finding is consistent with my findings and review of aerial photography between 1944 and 2024. The current fields were first apparent in aerial photography in 1949. (https://usace.contentdm.ocic.org/utils/getfi le/collection/p266001 coll1 /id/7613) C) Great Plains Regional Data Sheet ), 2 pages D) USDA, NRCS, 2018 Field Indicators of Hydric Soils in the United States, Version 8.2, LM Vasilas, et.al. ('. ) E) Where appropriate, the 2012 Field Book for Describing and Sampling Soils, Version 3.0 NRCS, NSSC, Lincoln, NE(. F) State of Colorado Hydric Soils List G) USACE - 2018 National Wetland Plant List for Colorado H) ERDC-CRREL TR-22-26.pdf, National Ordinary High Water Mark Field Delineation Manual for Rivers and Streams . Interim Version US -EPA, 2019, April 10, Exemptions to Permit Requirement under CWA Section 404, 2 -pages, https://www.epa.gov/cwa-404/exemptions-permit-requirements-under-cwa-section-404 USACE, 2020, July 24, Joint Memorandum to the Field Between the US Department of the Army, Corps of Engineers and the US Environmental Protection Agency Concerning Exempt Construction or Maintenance of Irrigation Ditches and Exempt Maintenance of Drainage Ditches Under Section 404 of the Clean Water Act, 7 - pages https://www.epa.gov/sites/production/files/2020-07/documents/final_ditch_exemption memo july 2020 with epa.p df USACE, 2007, July 4, RGL 07-02, Exemptions for Construction or Maintenance of Irrigation Ditches and Maintenance of Drainage Ditches Under Section 404 of Clean Water Act, 8 -pages, Superseded by USACE, 2020 July 24 Joint Memorandum, https://www.nap.usace.army.mil/Portals/39/docs/regulatory/rgls/rg107-02.pdf 4 In accordance with 33 CFR §323.4 (a) (3), Discharges not requiring permits states: Construction or maintenance offarm or stock ponds or irrigation ditches, or the maintenance (But not construction of) drainage ditches. Discharges associated with siphons, pumps, head gates, wing walls, weirs, diversion structures, and such other facilities as are appurtenant and functionally related to irrigation ditches are included in this exemption. D:\273326\AsphaltSpecialities\Letter Opinion\opinion letter final draft r2.wpd 2 Letter Opinion - Review at the Approximate 42 -acre Project Area (Marcovich Mine Area) Page 3 Utilizing the rapid ordinary high water mark (OHWM) field identification sheet, the South Platte River is located on the western edge of the site, and there are two distinct floodplains that should be avoided and were delineated on Attachment 1, Figure 3, Attachment 3. The first appears to the active floodplain which would probably be within the active channel (2- to 5 -year return interval floodplain) and is adjacent to the South Platte River. The second contains the Cottonwood canopy and appears to the be the 25 -year return interval or the cottonwood recruitment floodplain (Attachment 3). In an abundance of caution, mining activity should stay out of these areas (Attachment 1, Figure 3). Without a formal floodplain model in HECRAS this recommendation is based on field indicators related to geomorphic, sediment, vegetation and ancillary indicators'. Two soils pits were excavated to a depth of 50 inches within the site at the lowest elevation on the site (#1) and within an abandoned oxbow area within the cottonwood recruitment 25 -year return interval (#2). The groundwater level was at 48" in #1 and there was no groundwater present in #2. Soils were characterized according to the USACE Great Plains Supplement Data sheet (Attachment 2). There were no field indicators of current hydric soils including recent redoximorphic features. While the vegetation in the #2 did meet the criteria for hydrophytic vegetation, it is typical of abandoned oxbows and where supplemental irrigation was channeled. In sort, neither pit met the criteria for wetlands. Finally, given the standard for Clean Water Act Jurisdiction under Sackett v. Environmental Protection Agency, 598 U.S. 651 (2023), the east side of the project area where Asphalt Specialities is undertaking mining development as identified in Attachment 1, Figure 3, does not appear to be under USACE jurisdiction. No traditional interstate navigable water, impoundment, tributary or other WOTUS exist on the east side of the site, nor does it contain tributary channels that flow onto or across it. There are jurisdictional WOTUS areas located on the west side of the project site6. Utilizing the USACE rapid ordinary high water mark (OHWM) field identification data sheet, I walked the channel and floodplain within the study area and walked out to the bench for the active flowing river channel and developed a general understanding of the overall site characteristics. There were no anthropogenic influences on the channel system and the site conditions were consistent with historical photos dated between 1948 to 2024 from both historicaerials.com and googleearth. I was able to develop a general understanding of the geomorphology and vegetation at the site and observed their differences across the hydrogeomorphic floodplain visually from the active South Platte River channel to through the Cottonwood canopy. 6For wetlands to qualify as WOTUS, over which the USACE/EPA would have jurisdiction, wetlands must meet two tests: first, they must "qualify as `waters of the United States' in their own right" by being indistinguishably part of a "relatively permanent, standing or continuously flowing bod[y] of water `forming geographical features that are described in ordinary parlance as `streams, oceans, rivers and lakes;"' and second, they must have "a continuous surface connection with that water" such that "it is difficult to determine where the `water' ends and the `wetland' begins." Sackett, Slip op. at 14, 21-22. See also 40 C.F.R. 120.2(a)(4) (defining jurisdictional wetlands —or "(a)(4) waters" —as wetlands "adjacent" to (1) waters used in interstate or foreign commerce and waters subject to tides —commonly called traditional interstate navigable waters or "(a)(1) waters," or (2) relatively permanent, standing or continuously flowing impoundments or tributaries, referred to a "(a)(2) waters" and "(a)(3) waters," respectively); 40 C.F.R. 120.2(c) (defining "adjacent" as "having a continuous surface connection"). As explained in this memorandum, the areas on the eastern side of the site and do not include any (a)(1), (a)(2), (a)(3), or (a)(4) waters — rather, they are uplands which were artificially irrigated on a seasonal basis through a man-made ditch constructed on an upland and would be exempt. This report does not cover the state of Colorado D:\273326\Asphalt_Specialities\Letter Opinion\opinion letter final draft r2.wpd 3 Letter Opinion - Review at the Approximate 42 -acre Project Area (Marcovich Mine Area) Page 4 Introduction: The proposed Marcovich Mine area is composed of approximately 42 acres and has agricultural fields containing supplemental irrigation ditches (Attachment 1, Figures 1 a -1c). There was no supplemental water flowing in any of the irrigation ditches, nor any area of surface ponded water on the site during the site visit. Shallow groundwater was at approximately 48 -inches below the ground surface on March 31, 2024. According to local NOAA climate records approximately 1.78 inches of rainfall was received in March (slightly above the average of 1.21 inches) and at the site 0.38 inch was received six -days prior to the March 31, 2024 site visit. The site is indicative of poorly maintained agricultural fields where supplemental irrigation is captured and diverted to various areas to promote grasslands. Geos conducted several field tasks including walking the perimeter of the site, defusing the ordinary high water mark (OHWM), and identifying avoidance/no entry areas related to any work activities. See Attachment 1, Figure 3 for defined work areas on the east side of the site where work activities could potentially take place given other local, state and potential other federal permits. Soil & Hydrology: The proposed Marcovich Mine area is complex in that it includes NRCS mapped hydric soils found in areas such as abandoned or historic oxbows (Attachment 1, Figures 2a and 2b, and Attachment 2 (Ellicott Sands, Atvan, Aquolls and Aquents-gravely substratum)). Two soil trenches were excavated by backhoe to a depth of fifty -inches at an old abandoned oxbow where the site is wettest, and in the adjacent field area (adjacent to the Cottonwood canopy) mapped as Atvan loam (but is actually a very coarse sand) (Attachment 1, Figure 2b). One soil trench was excavated in the lowest area in the historic oxbow and groundwater was encountered at a depth of 48 inches below land surface. This depth is too deep to induce wetland conditions. Ponded surface water was not found at the site. It appears this area ws filled prior to 1949. In the adjacent field (typical elevations across the site), a very coarse sand was encountered from eight inches to 48 inches below ground surface, before the trench walls collapsed. The top eight inches of soil appear to be imported fill composed of loamy materials similar the field to the south of the site. It is important to note that there were no recent field indicators for hydric soil such as concentrations, deletions, reduced matrix, oxidized rhizospheres on living roots, water marks, sediment deposits, or drift deposits per the USACE Great Plains wetland determinations data form in either soil trench profile. The site is what I would typically expect to find in poorly maintained irrigated pastures. Vegetation: Vegetation is consistent with irrigated areas with grasses and contains many weedy species such as cheatgrass, some reed canary grass and whitetop (broad -leafed pepperweed) with creeping wild rye, and willow species interspersed throughout the older oxbow area. The fields are also planted with more dryland grass species. While there is some wetland vegetation on the site it seems to be contained in the irrigated ditch areas and is drying (Attachment 2). pending gap water rule mainly because there is no current rule yet. D:\273326\Asphalt_Specialities\Letter Opinion\opinion letter final draft r2.wpd 4 Letter Opinion - Review at the Approximate 42 -acre Project Area (Marcovich Mine Area) Page 5 Conclusion: For the purpose of this letter report, the area on the west side of the site should be avoided by any work activities, and the area on the east side of the site appears to be open to land disturbance activities given local, state and other federal permits. As stated during the field visit, due to recent federal regulatory changes under the Sackett decision and pending/potential Colorado state regulations, the presence or absence of an affirmative wetland finding is problematic, and a wetland delineation or aquatic resources determination can only be approved by the USACE. Even after reports could be completed, the area would be considered an atypical problem area due to the supplemental irrigation and could take upwards of a year to obtain a USACE approved jurisdictional determination. Aquatic resources identified herein would probably be consistent with Section 404 under the Sackett decision. However, due to the agricultural exemptions under both versions of the proposed Colorado Gap rules, these findings may also be sufficient for state requirements. Because you are avoiding the obvious areas that would meet WOTUS/wetland definitions (absent irrigation and other exemptions/exclusions) this letter may suffice to direct next tasks at a state level (Attachment 1, Figure 3). It is recommended that the areas shown in Attachment 1, Figure 3 be avoided by proposed mine activities. Please call me with any questions or concerns you may have. Respectfully submitted, /s Lori Carpenter, SPWS Hydrologist/Hydrogeologist cc: Mr. Benjamin H. Miller, PhD., ATTACHMENTS: Attachment 1 - Figures Attachment 1, Figure la Site Location Map Attachment 1, Figure lb Site Location Map - USGS Topography Attachment 1, Figure 2a Fort Lupton Resource Map, NWI & NHD Resources Attachment 1, Figure 2b Fort Lupton Resource Map, Hydric Soils and FEMA Floodplain Attachment 1, Figure 3 Avoidance Area Attachment 2 - Wetland Data Sheets Attachment 3 - Ordinary High Water Mark Data Sheet - KML File with GPS Points to Demarcate Work Versus No Work Areas. D:\273326\Asphalt_Specialities\Letter Opinion\opinion letter final draft r2.wpd 5 ATTACHMENT 1 - FIGURES Attachment 1, Figure la Site Location Map Attachment 1, Figure lb Site Location Map - USGS Topography Attachment 1, Figure 2a Fort Lupton Resource Map, NWI & NHD Resources Attachment 1, Figure 2b Fort Lupton Resource Map, Hydric Soils and FEMA Floodplain Attachment 1, Figure 3 Avoidance Area Longmont, CO Longmont, CO Detail Map Area Dacono,-CO Fort Lupton, Dacono, CO Colorado Lafay e --Louisville, Brighton, CO C'l9 ,Lafayette --Louisville, Brighton, CO Denver --Aurora, CO Denver==Aurora, CO Project AOI Fort Lupton 27. Powars 104°4'40"W 104°4'30"W pper Left: 104°49'48" 0 0°4'15"N Tr Cr- 0 0 ° 0 0 0 O 104°4'20"W 104°4'10" N 104°49'W Z I 3 I - I ) a 104°4'50"W 104°4> '4c N 4 - O 1.1 I I I 104°4' '4Q"AL P H Project AOI P H 0 U, 27 O rr O rn 0 0 (Lower Right: 104°48'34"W 40°3125"NI _L I I 0 0 I I v. 104°4'30"W 104°4'20"W 104°410"W 104°149'W 104°4$'50"W 104°4$'40"W 0 500 1,000 I r r r I r r 1 l Feet 1 inch = 1000 feet Attachment 1, Figure 1 Site Location Map Ft. Lupton Area Asphalt Specialties Path: E:\Asphalt Specialties\Asphalt Specialties.aprx e!OSVANJ 9 1797 Trek Trail, Reno, NV 89521 Figure la tongmoht, Lo Longmont, ICO Detail Map Area Dacon 40 WELD Dac n Co COUNTY 1-ort Upton, IColorado Lafayette --Louisville, CO f 1 Brigl1tor,}'CO G Denver --Aurora, C ADAMS C t NTY '' Weld County Project AOI F it Lill 1, h pperl Left: 104°49'35"W I 0°4'21"N -r N A 1 Project AOI Lower Right: 10448'34"W 40°3'39"N 104°49'30"W 0 500 1,000 Feet 1 inch = 2000 feet 104°49'15"W Attachment 1, Figure 1 Site Location Map 104°49W Ft. Lupton Area Asphalt Specialties Path: E:\Asphalt Specialties\Asphalt Specialties.aprx 10.10AWL WW L --LL_ 1797 Trek Trail, Reno, NV 89521 Figure lb 104°49'30'W 104°49W 0 I I I I I I 1 1 I Upper Left: 104°49'48"W 40°4'30"N 600 1,200 Feet OSMQ 9 1797 Trek Trail, Reno, NV 89521 Spatial Reference GCS WG5 1984 104°49'30'VJ 104°49W Fort Lupton Resource Map Figure 2a Asphalt Specialties Prepared 03/25/24 Lower Right: 104°48'54"W 40°3'13"N Legend Co Wetlands NHD Waterbody Freshwater Emergent Wetland Q NHD Waterbody Freshwater Forested/Shrub Wetland NHD Flowline Freshwater Pond NHD Flowline Plverine PROJECT_AOI Project Area Boundary Path: E:\Asphalt Specialties\Asphalt Specialties.aprx 104°49'30'W 104°49W 0 600 1,200 Fee I i i I i l t I 1 Inch = 600 Feet �sLt 1797 Trek Trail, Reno, NV 89521 Spatial Reference GCS WGS 1984 104°49'30"W 104°49W '�011" Fort Lupton Resource Map Figure 2b Hydric Soils and FEMA Floodplain Asphalt Specialties Prepared 03/25/24 Legend [—I 100 Year Flood Plane Project Area Boundary Altvan loam, 0 to 1 percent slopes Aquolls and Aquents, gravelly substratum Water Path: E:\Asphalt Specialties\Asphalt Specialties.aprx Upper Left: 104°49'56"W 40°4'30"N 0 600 1,200 Feet' 11 I 1 I 1 Inch = 600 Feet OSC� °QA 9 1797 Trek Trail, Reno, NV 89521 Spatial Reference WGS 1984 UTM Zone 13N 104°49'30"W 104°49'W Avoidance Areas oeN•Titl f• nd / WO 'Area Project Areal Avoidance Areas Figure 3 Asphalt Specialties Prepared 05/10/24 Legend Freshwater Emergent Wetland Freshwater Forested/Shrub Wetland Freshwater Pond Rivenne Project Area Boundary Avoidance Areas Land Avoidance Area Corps lurisdichon Avoidance Areas 1 104°49'30'W 104°49'W Lone Pine Lower Right: 104°48'46"W 40°3'13"N Path: F:\Asphalt Specialties\Asphalt Specialties.aprx ATTACHMENT 2 - WETLAND DATA SHEETS D:\273326WsphaltSpecialities\Letter Opinion\att box.wpd 2 WETLAND DETERMINATION DATA FORM — Great Plains Region site: t\C(co\i‘ch Mine.- CAYI: Wet8sawing lkibe r2 14 wowner. ac,Actrf Sp'ect(1i�f:Cc CD t S): C. a -'.nf e r Section, Township, : / f � ( old.--f-e�-rr)ccg-t-10004 pIA x G\1f"r .� MP(4-1— (max ternLIAO rtmAsa0 3NBr� � 20 wow too 3 Sap tint Hamm Al () O t t/ O tb I fo 4,x.4 NY Iclassification: YO- A Ct A Omsk/ tryarorogiem oSanthesbtypcaifathistineofyear? Yes V No (U no, expkin in ) or Hydrology A • Am f or Hydrology natundy problematic? , .(if needed, answers in Remarks.) yegeladon , Soilmi Cicumstances- present? Yes No Are Vegetation . Soil ��raucev ne entnutrQ _ awl. cite man ahcsrrtrta smrt na tint transacts, importimt features, etG. Y Vegetation Present? Yes v No r b the Sanipled Ann within a Wetland? Yes No �j Soil Present? Yes No Hydrology Present? Yes No si Vi)© t-1`e.Z%cLV CafFam,060d re a (it t iM e1bend-i VEGETATION — Use scientific names of plants. Absolute Dominant Indicator Pint size: ) " Dot nimwsce Test worksheet t Number of Dominant Species �Status �t o�- 0 �ibli �t� e} That Are OBL, FACW. or FAC 3 ---- """ (eoaM g FAC-): (A) 2 TO Number of Dominant 3. Species Across Ali Strata: (B) 4 S SStratum t "11= Total Cover (Plot side: ) Potent d Dominant Species That Are OBI, FACW, or FAC: © (NB) i t} i,� ` �� • �`�' �/�� bY: vim' Total % Cover of: MuNiolv �� « ! OBL species x 1 = i r.--- 4 ' 1 1'�1�. (�Tes = co T 1�' f'" FACWspecies - x2 FAC species IO x 3 = = Total Cover 6 C3 FACU x4 = (plot site: ) UPL species 8 _ x 5 = fQ'� , � " Column Totals: 35 (A) (B) .l 2 • 3 3MACr 4 1-1 Prevalence index = BIA = 5 5 �� 6 1 — 1- Rapid Test for Hyrkvptytic Vegetation ' 4.2 - Dome Test is >50% _ 3 - Prevaonoe index is sac' g 9 _ 4 - Morphological Adaptations' (fie supporting data in Remarks or on a separate sheet) Problematic Hydrophytic Vegetation' (Explain) . -ye Total Cover (Plot size: ) _ 'Indkalora d tlydrlc soil and wetland hydrology must be present, unless dishxbed or problematic. HildloPhYfic Total Cover Von Yes 1( No Present? Bare Ground in Herb Stratum -- — 4v(2A-- o jute t A�..BIKi,i/RR0d %wk. (' a ( (y bki-4-e4/1- I IC arm, name of Fnninners Great Plains — Version 2.0 Pt) 53 ' -h)-Fa 4e, Sampling Point: sod. Prdfile Description: (Describe to the depth needed to document the indicator or confirm the absence of Indicators.) DElPth Matrix Redox Features finches) CRkr ( ist) % Color (moist) % Type' Lot 0'17)1S oYR 3 coo 4i p iaY�2 - Leo 2A __50 tfVf9. kr2. tb0 10'� �,5J lt(�Z>~I t �l2 r.aa 2 SCI 1.10 e-edo)c RM Red cad Matrix, CS=Covered Covered or Coated 4S kT : C --Concentration, D=Depiet=ua H dric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Sandy Gleyed Matrix (S4) _ Sandy Redox (S5) _ Stripped Matrix (S6) _ Loamy Mucky Mineral (F1) _ Loamy Gleyed Matrix (F2) _ Depleted Matrix (F3) _ Redox Dark Surface (F6) _ Depleted Dark Surface (F7) _ Redox Depressions (F8) _ High Plains Depressions (F16) (MLRA72&73 ofLRR H) Histosol (A1) Histic Epipedon (A2) Black Histic (A3) Hydrogen Sulfide (A4) _TT Stratified Layers (A5) (LRR F) 1 cm Muck (A9) (LRR F. G, H) Depleted Below Dark Surface (A11) Thick Dark Surface (Al2) Sandy Mucky Mineral (S1) 2.5 cm Mucky Peat or Peat (S2) (LRR G, H) 5 cm Mucky Peat or Peat (S3) (LRR F) T Texture Remarks and Grains. 1/ I► 2Location: PL=Pore Lining, M=Matrix. Indicators for Problematic Hydric Soils3: _ 1 cm Muck (A9) (LRR I, J) _ Coast Prairie Redox (A16) (LRR F, G, H) _ Dark Surface (S7) (LRR G) High Plains Depressions (F16) (LRR H outside of MLRA 72 & 73) _ Reduced Vedic (F18) _ Red Parent Material (TF2) _ Very Shallow Dark Surface (TF12) _ Other (Explain in Remarks) 3lndicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic. Ristrictive Layer (if present): Type: Depth (inches): Hydric Soli Present? Yes No Remarks: f Re `` ,0 c -h\ ro U Ci ( \Q 9*. . Wetland Hydrology indicators: Indicators (minimum of one reauired: check all that aooly) Secondary Indicators (minimum of two reouired) tary 14rrSurface Water (Al) i 1 - _ Salt Crust (811) _ 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 (87) _ 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 / Depth (inches): / Wetland Hydrology Present? Yes Noy Table Present? Yes No -7- Depth (inches): water Yes No Depth (inches): PtUration Present? ndudes capillary fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: W04327( l( �t (1 ' 1 Pi -F- ( &, opxQ o u( D Ef . Ce USACE US Army Corps of Engineers Great Plains — Version 2.0 lAep unit Name: I (i Colt — atl'‘d NWI : Ar+ I hydrologic collators on the she typical for this time of yeah Yes No (If no, explain in Remarks.) Sot . or Hydrology signihcaney disbxbed? Are Named Ciic*m stances' present? Yes No Pirs Vegetation - Sail . or Hydrology naturally problematic? (if needed, explain any answers in Remarks.) S MMARY OF FINDINGS - Attach site map showing sampling point locations, inutsects, Import:let features, etc. No V-/ No V No 4 WETLAND DETERMINATION DATA FORM - Great Plains Region , di) }� t AO adylcounty. Oleic( Sampling Dakr. 24 1°4 6103C1- C,c,1 e S State: co Samprivkit e, S : Ct te_ ' ' te-C Section, Township, (Metope, - f etc.)• 1(.l C( ` ' �kiCil relief (concave. convex. name): A4 Stops (xk (max(' tcern Qvc 4f3' "N LonFltalAi'q'elICO" W tssft 8a Ni Vegetaion Present? Soil Present? Hydrology Present? Yes Yes Yes ekle Msg.- -b "RC) 0C4 , 'l of Vver Is the Sampled Ares within a Wetland? Yes OETATION — Use scientific names of plants. Absolute Dominant Indicator (Prot size` ) %Cover lagNal Std (Plot si = Total Cover Doaitance Test worksheet Number of Dominant Species That Ave O81, FACW, or FAC (A) (excluding FAC-): Total Number of Species Across (8) Permed Spades OB1, FACW. or FAQ (MB) 2' 3 4, 5 MO Sty (Plot size: 1 3 4 5 6 7 8 Vme Stratum (Plot size: } Total Cover = Total Cover Prevalence Index worksheet Total % Cover of Manly bv: OKs x1= FACW species x 2 = FAC species x 3 = FACU species x 4 = upl species x 5 = Coburn Totals: (A) (B) Prevalence Index = BIA= itydrophyticy- - Rapid Test for Hydrophytic Vegetation _ 2 - Test is >50% _ 3 - index r8 sa.o' 4 - ' (Provide supporting data in one separate sheet) _ Problematic Hydrophytic Venstaia& (Expian) thldswtm of hydric sod and wetland hydrology must be present, unless disturbed or probiemadc. are Ground in Herb Stratum = Total Cover flYdroPhYac Vegetation Present? Yes No No vey 4bG111,46 A corps of Engineers Great Plains — Version 2.0 SOIL P4fne Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Matrix Redox Features Color (moist) 96 Color (moist) % Tvoe' Loc2 Texture VCoS A oY� 0 : C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. ric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Histosol (A1) Histic Epipedon (A2) _ Black Histic (A3) Hydrogen Sulfide (A4) 4 Stratified Layers (A5) (LRR F) 1 cm Muck (A9) (LRR F, G, H) t Depleted Below Dark Surface (A11) -�- Thick Dark Surface (Al2) 4- Sandy Mucky Mineral (S1) rt 2.5 cm Mucky Peat or Peat (S2) (LRR G, H) 5 cm Mucky Peat or Peat (S3) (LRR F) _ Sandy Gleyed Matrix (S4) _ Sandy Redox (S5) Stripped Matrix (S6) _ Loamy Mucky Mineral (F1) _ Loamy Gleyed Matrix (F2) _ Depleted Matrix (F3) _ Redox Dark Surface (F6) _ Depleted Dark Surface (F7) _ Redox Depressions (F8) High Plains Depressions (F16) (MLRA 72&73 ofLRR H) Sampling Point: �-• Remarks h0 Iii %•1c.i 2Location: PL=Pore Lining, M=Matrix. Indicators for Problematic Hydric Soile': _ 1 cm Muck (A9) (LRR I, J) _ Coast Prairie Redox (A16) (LRR F, (3, H) _ Dark Surface (S7) (LRR 0) _ High Plains Depressions (F16) (LRR H outside of MLRA 72 & 73) _ Reduced Vertic (F18) _ Red Parent Material (TF2) _ Very Shallow Dark Surface (TF12) _ Other (Explain in Remarks) 3lndicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic. lust is tive Layer (if present): Type: Depth (inches): *marks: t� qa° u� [A0tC, fa( iv' cOlke i1) vv4 Hydric Soil Present? Yes No 171 HYDROLOGY Wetland Hydrology Indicators: Flrimary Indicators (minimum of one required: check all that appiv) Surface Water (A1) -t— High Water Table (A2) Saturation (A3) Water Marks (B1) Sediment Deposits (B2) _ Drift Deposits (B3) Algal Mat or Crust (B4) �— Iron Deposits (B5) Inundation Visible on Aerial Imagery (B7) Water -Stained Leaves (B9) _ Salt Crust (B11) Aquatic Invertebrates (B13) _ Hydrogen Sulfide Odor (C1) _ Dry -Season Water Table (C2) Oxidized Rhizospheres on Living Roots (C3) (where not tilled) _ Presence of Reduced Iron (C4) Thin Muck Surface (C7) _ Other (Explain in Remarks) Secondary Indicators (minimum of two reauiredj Surface Soil Cracks (66) Sparsely Vegetated Concave Surface (B8) Drainage Patterns (B10) _ Oxidized Rhizospheres on Living Roots (C3) (where tilled) Crayfish Burrows (C8) _ Saturation Visible on Aerial Imagery (C9) _ Geomorphic Position (D2) FAC-Neutral Test (D5) Frost -Heave Hummocks (D7) (LRR F) eId Observations: Surface Water Present? Water Table Present? Saturation Present? Includes capillary fringe) escribe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Yes No Depth (inches): Yes No Depth (inches): Yes No Depth (inches): Wetland Hydrology Present? Yes No Remarks: N1) @ bokbm o{ \((o, De�wer nEfiO) Us�� US Army Corps of Engineers Great Plains — Version 2.0 CN -O it co V -- it a- . -4o Co Soil Pit #2 Soil Pit #1 ATTACHMENT 3 - ORDINARY HIGH WATER MARK DATA SHEET See KMZ-KML File on email or disk D:\273326\AsphaltSpecialities\Letter Opinion\att box.wpd 3 U.S. Army Corps of Engineers (USAGE) PID ORDINARY HIGH WATER MARK (OHWM) FIELD IDENTIFICATION DATA SHEET The proponent agency is Headquarters USACE CECW-CO-R. OMB Conbol No. 07104000f Approval Expires: Il�t� Prpject ID #: E? I Site Name: Ma �C U 1 M t one Data and Time: 3/Z11 21;4z4- l -chestier patliong): r° t or i+l r 2724 ss: `Ctr r r-i `1 e r Y� Slap 1 She overview from remote and online resources Check boxes for mine resources used to evaluate site: gage data 'climatic data satellite imagery land We maps nSerial photos topographic maps Describe land use and flow conditions from onflne resources. Were there any recent extreme events (floods drought)? 1storr.- a l 4 t.rCil C ` ©�� e Wo(I� 1PbP Corniple t d > of o1+wti%, 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 rote of natural or man-made disturbances that would affect low and channel form such as , riprap, landslides, rockfalls etc. �� r lL r e 1s a t t t tt (l iasr ea.4 f/A-''`�c.�c-e-i-t kiJes-cc iG, t vex C 'A fi~r C.� ZQ -e 5 VT .en ��c� � �. dr�� betw��e �. `'� Sep 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 wpropriate 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. eomorphic indicators Break in slope: on the bank nundercut bank valley bottom: Other. Shelving: shelf at top of bank: I I natural levee: man-made beans or levees: other banns: Channel bar: shelving (bears) on bar: unvegetated: II vegetation transition (go to veg. indicators) sediment transition (go to sad. indictors) I lupper limit of deposition on bar: Instream bedforms and other bedload transport evidence: deposition bedload indicators (e.g., imbricated c lasts gravel sheets, etc.) bedforms (e.g., ponf4 riffles, steps, etc.): erosional badload indicators (e.g., obstacle merles, scour, smoothing, etc.) Secondary channels: II WAR t=!;8dogic maPOU r cc Sediment indicators t Soil development Changes in character of soil: I I Mudcra den Changes in particle sued distribution: ntransition from nupper unlit of sand -sized laartrafes slit deposits: to Vegetation Indicators I1 Change in vegetation type anchor density: Check the appropriate boxes and select the general vegetation change (mg., graminoids to woody shrubs). Describe the vegetation transition looking bum the middle of the channel, up the banks, and Into the floodlit Dirt_ ❑ absentr moss to forts to: graminoids to: woody shrubs to: dedduous trees to: coniferous trees to: Vegetation matted down andlor bent Exposed roots below intact soil layer AncNaiy indicators Wrackinglpresence of It organic Utter: 1 1 presence of large wood: H( Leaf litter disturbed or I washed away: nWatersta: Weathered dais or bedrock: • Other observed indicators? Describe: There is ar) orb r � et. to e►i_(1' 1*I I\ �.x 1 T� e d fe .r\A s ut1 OD- i1in 'to t( s\ ,s ooV�.�bau:L Step 4 is additional information needed to support tits nYes No If yes, describe and attach information to datasheet ENG FORM 6250, AUG 2021 PREVIOUS EDITIONS ARE OBSOLETE. Page 1 of 4 Riled ID#: ©v-1 wM 11 -cols Qct Mid'Polk°.2'L .-3 1t/ N • s Oescrft r n81e for loon of OHWM Walt( s Is ct, cross `-ectIo+yrc, -g litlditional observations ot> Vi(kkOWS < Twits , Goiisbni Usodis This benoh geu_ It Is vvoo deb Sesdl3esj rti - ,-- , , Q.v c.- e i ,,, - - , --- l y. �ls we,Han : ; ,i, lip -k -1411s toe.nc-i ../a_r- t e L. ► w -e -C t►'-) 2 kb A Attach a photo tog attire site. Use the table below, or Mesh sepesatety. Photo se ON° gno. explain why not -- P -. 0004 3)a A List ideAograpbs and inter desaiptions in the 'table below. t Nimber photographs to the order that they are taken. Aiterh phonographs and include annotations of features. 1 Photo NumberPhoio vl+ ©© kecLr 1 Ss o .4...A)6 A 1 L4C( Y't », carvt�� tr S 1 a 141-- 1 <" ,.i, 1 1 'Ai f CI oC1 1' -rLe(2,14-. p k0 fo 1141A h itI 70 ( 3l I t ) 2.©tel 2o2-( t to l TF4 pbvtd t7 lel S414%0 5 erf; r Y 1 wl-e` Corsi cio t^ L � Saws 'a s yh. ct- r^ lc'Q- et Q. s 10 9kiEr r- )tT-u 0 t -t} , . t END PORN UM, ans2921 Page 2 of 4' EXHIBIT K CLIMATE INFORMATION The Marcovich Mining Resource is located southeast of Fort Lupton, Colorado at an elevation of approximately 4890 feet. The area is classified as a cold semi -arid climate (BSk) under the Koppen Climate Classification system. This climate type is typically characterized as dry and moderate with cool, wetter winters and warm, dryer summers. Table K-1 shows a summary of the climate for this area based on records from 1980-2016. Table K-1 Climate Data of Fort Lupton, Colorado4 Average Temperature (F) Average Precipitation (in) Maximum Minimum Total precip. Total snow January 43 20 0.5 2.1 February 47 23 0.4 2.3 March 56 29 0.9 2.7 April 63 36 1.3 1.6 May 82 45 2.4 0.2 June 83 54 1.7 0.0 July 88 59 1.3 0.0 August 86 57 1.2 0.0 September 78 48 1.2 0.2 October 65 37 0.8 1.3 November 52 27 0.5 2.5 December 42 20 0.3 2.6 Yearly (avg) 65.4 37.9 12.4 15.5 4 https://weatherspark.com/y/3746/Average-Weather-in-Fort-Lupton-Colorado-United-States-Year-Round Marcovich Gravel Pit May 2024 K-1 El Lewicki 81 Associates EXHIBIT L RECLAMATION COSTS The worst -case reclamation scenario will occur at the beginning of mining due to the cost of the slurry wall. Inlet and outlet structures are included in this estimate, but do not need to be constructed immediately. Before mining progresses within the 300 -foot offset, the structures will be installed. In addition to the slurry wall cost, the highwall will be dozed to a 1.5H:1V slope and then backfilled with material to a 3H:1V slope. Sufficient material stockpiles will remain onsite until the final backfilling is complete. For worst case bonding, it has been assumed that 1000 feet of highwall will require backfill and other reclamation work. After final grading is complete, stockpiled topsoil will be placed at a thickness of one foot. The topsoiled areas will then be seeded based on the permitted seed plan. A breakdown of the estimated worst -case reclamation cost is shown in Table L-1. Once the slurry wall is installed, the permittee may pursue a reduced bond via a bond reduction request to CDRMS. The slurry wall unit cost is based on previous CDRMS slurry wall cost calculations for other similar sites. Marcovich Gravel Pit May 2024 L-1 Lewicki 8i Associates Table L-1 Marcovich Mining Resource Bond Estimate. 1)escl'lntloll Construct slurry wall. 4750 -ft by 50 -ft deep. Material Quantity 237,500 Unit Sq. ft. Unit COST $4.30 Cosi $1,021,250 Inflow / outflow structures including excavation, riprap, concrete, and vegetation. 1 each $35,000 $35,000 Topsoiling to 1 FT. deep along the slurry wall installation path. 20 -ft wide x 4750 -ft long (2.2 acres) x 1 -ft deep. 3,520 CY $1.05 $3,700 1000 -ft of highwall backfilled from 1.5H:1V to 3H:1V to a depth of 25 -ft. 17,360 CY $1.05 $18,230 Topsoil areas above water level and above highwall 1 ft. deep (4 acres) 9,680 CY $1.05 $10,160 Scarify topsoiled areas prior to seeding (slurry wall installation path + highwall and surroundings) 6.2 acres $150 $930 Seeding of topsoiled areas. 6.2 acres $400 $2,480 Mulching of topsoiled areas. 6.2 acres $500 $3,100 Weed control management for two years. 2 each $1500 $3,000 Subtotal $1,108,010 DRMS cost (28%) $310,243 Total $1,418,253 Marcovich Gravel Pit May 2024 L-2 Lewicki 8I Associates EXHIBIT M OTHER PERMITS REQUIRED The following permits are necessary to operate at the Marcovich Mining Resource. Copies of all permits will be provided to the Division after they have been acquired. 1. Weld County Use Permit 2. Colorado Air Pollution Control Division Fugitive Dust Permit and Air Pollution Emission Notice (APEN) 3. Water Quality Control Commission Discharge Permit 4. Colorado Dept. of Transportation access permit 5. Weld County Floodplain Development permit 6. Colorado' Division of Water Resources gravel well permit Marcovich Gravel Pit May 2024 M-1 El Lewicki & Associates EXHIBIT N RIGHT OF ENTRY The surface and mineral owners of the property to be mined are Jerry and Adam Marcovich. A right of entry affidavit is attached. Marcovich Gravel Pit May 2024 N-1 El Lewicki & Associates APPLICANT'S INTEREST IN THE PROPERTY AND LEGAL RIGHT TO ENTER The Applicant, Asphalt Specialties Co., Inc. is granted the legal right by the property owner to apply for permitting to mine sand and gravel on the property owned in fee simple and as set out below and in the attached Quit Claim Deed (Attachment). We certify that Asphalt Specialties Co., Inc. is the Applicant for the Marcovich Mining Resource and has our permission, as owners of the property, to apply for the mining permits and to mine the property described in the Attachment and as certified below: Weld County Parcel ID: 147107000015 in the South 1/2 of Section 7, Township 1 North, Range 66 West, 6th PM, Weld County, Colorado By: By: • e;,✓#) ry D. Metovich % ' Adam D. Marcovich Signed and sworn to me this day of , 2024, by Jerry D. and Adam D. Marcovich, owners. ACKNOWLEDGEMENTS STATE OF COLORADO COUNTY OF Ss Witness my hand and official seal Notary Public My Commission Expires EXHIBIT 0 OWNERS OF AFFECTED LAND AND MINERAL TO BE MINED The owner(s) of record of affected land (surface area) and owners of substance to be mined are Jerry and Adam Marcovich. Marcovich Gravel Pit May 2024 0-1 MI Lewicki & Associates EXHIBIT P MUNICIPALITIES WITHIN TWO MILES The Marcovich Mining Resource is located immediately southeast of Fort Lupton, Colorado, a city in Weld County. Fort Lupton 130 S McKinley Avenue Fort Lupton, CO Marcovich Gravel Pit May 2024 P-1 El Lewicki & Associates EXHIBIT Q PROOF OF MAILING OF NOTICES TO THE BOARD OF COUNTY COMMISSIONERS AND SOIL CONSERVATION DISTRICT Notices were filed with the Weld County Board of Commissioners and the West Greeley Conservation District in support of this permit application. Weld County Board of Commissioners 1150 O Street P.O. Box 758 Greeley, CO 80631 Platte Valley Conservation District 57 W Bromley Lane Brighton, CO 80601 Marcovich Gravel Pit May 2024 Q-1 ® Lewicki Si Associates OUTBOUND TRACKING NUMBER 9414 7118 9956 4475 4422 20 RETURN RECEIPT TRACKING NUMBER 9490 9118 9956 4475 4422 00 ARTICLE ADDRESS TO: West Greeley Conservation District 4302 W 9th Street Rd Greeley CO 80634-1317 OUTBOUND TRACKING NUMBER 9414 7118 9966 4475 4161 84 RETURN RECEIPT TRACKING NUMBER 9490 9118 9956 4475 4161 33 ARTICLE ADDRESS TO: Weld County BOCC 1150 O Street PO Box 758 Greeley CO 80632-0758 FEES Postage per piece $0.640 Certified Fee $4:400 Return Receipt Fee $3 650 Total Postage & Fees: $8.690 Postmark Here FEES Postage per piece $0.640 Certified Fee $4_400 Return Receipt Fee - $3:650 Total Postage & Fees: - $8.690 Postmark Here EXHIBIT R PROOF OF FILING WITH COUNTY CLERK A return receipt from the Weld County Clerk & Recorder is attached. Weld County Clerk and Recorder 1250 H Street Greeley, CO 80631 Marcovich Gravel Pit May 2024 R-1 IlLewicki & Associates L I.ezw icki May 30th, 2024 County Clerk & Recorder Weld County 1250 H Street Greeley, CO 80631 SOCiatcs Marcovich Pit 112c Construction Materials Reclamation Permit Application, County Copy To Whom It May Concern Enclosed is a notice for a 110(c) application to the Colorado Division of Reclamation, Mining, and Safety for the operation to be known as the Marcovich Pit. The applicant is Asphalt Specialties Co., Inc. The Colorado Division of Reclamation, Mining, and Safety requires evidence that the application has been filed with your office. Therefore, please sign and date below. Thank you. Please contact me if you have any further questions or concerns at (720) 842-5321. The application was received on the following date: Received by: r ,, Regards, Benjamin Miller, PhD. Lewicki & Associates, PLLC (720) 842- 5321 Marcovich Pit © Lewicki & Associates EXHIBIT S PERMANENT MAN-MADE STRUCTURES The following is a list of man-made structures within 200 feet of the affected area. All of these structures are shown on Map C-1. Landowner boundaries can also be found on Map C-1. Proof of delivery of structure agreements is attached to this exhibit. In the event that a structure agreement is unobtainable, defer to the Geotechnical Stability Exhibit which indicates that all structures will be protected. Table S-1. Permanent Structures within 200' of the Affected Area Owner Owner Address Structu res General Location Sakata Land Co. Lawrence Scott City of Aurora Xcel Energy PO BOX 508 Brighton, CO 80601 1165 S Denver Ave Fort Lupton, CO 80621 i 15151 E ALAMEDA PKWY # 3200 AURORA, CO 800121555 7493 Highway 85 Fort Lupton, CO 80621 Colorado 10601 W. 10th St. Department of Greeley, CO 80634 I Transportation Access Road, fences, culverts, return irrigation ditch Fence, culvert, and return irrigation ditch Fence, culvert, and return irrigation ditch Parcel directly south of the permit area and across Highway 85 from the permit area. Located east of the affected area across Highway 85 North of permit area. Powerlines servicing permit area and property to the East of permit area. north. US Highway 85 and related structures. East of permit area. Marcovich Gravel Pit May 2024 S-1 Lewicki & Associates OUTBOUND TRACKING NUMBER FEES 9414 7118 9956 4479 4199 83 RETURN RECEIPT TRACKING NUMBER 9490 9118 9956 4479 4199 32 ARTICLE ADDRESS TO: Sakata Land Co PO Box 508 Brighton CO 80601-0508 Postage per piece $0.640 Certified Fee $4.400 Return Receipt Fee $3.650 Total Postage & Fees: $8.690 Postmark Here OUTBOUND TRACKING NUMBER FEES 9414 7118 9956 4479 1885 75 RETURN RECEIPT TRACKING NUMBER 9490 9118 9956 4479 1872 13 ARTICLE ADDRESS TO: Lawrence Scott 1165 S Denver Ave Fort Lupton CO 80621-8373 OUTBOUND TRACKING NUMBER 9414 7118 9956 4479 4302 30 RETURN RECEIPT TRACKING NUMBER 9490 9118 9956 4479 4302 72 ARTICLE ADDRESS TO: City of Aurora 15151 E Alameda Pkwy Ste 3600 Aurora CO 80012-1555 OUTBOUND TRACKING NUMBER 9414 7118 9966 4479 1069 37 RETURN RECEIPT TRACKING NUMBER 9490 9118 9956 4479 1069 79 ARTICLE ADDRESS TO: Xcel Energy 7493 Us Highway 85 Fort Lupton CO 80621-8809 Postage per piece $0.640 Certified Fee $4.400 Return Receipt Fee $3.650 Total Postage & Fees: $8.690 Postmark Here FEES Postage per piece $0.640 Certified Fee $4.400 Return Receipt Fee $3.650 Total Postage & Fees: $8.690 Postmark Here FEES Postage per piece $0.640 Certified Fee $4.400 Return Receipt Fee $3.650 Total Postage & Fees: $8.690 Postmark Here OUTBOUND TRACKING NUMBER 9414 7118 9956 4479 1049 88 RETURN RECEIPT TRACKING NUMBER 9490 9118 9956 4479 1049 37 ARTICLE ADDRESS TO: CDOT 10601 10th St Greeley CO 80634-9000 FEES Postage per piece $0.640 Certified Fee $4.400 Return Receipt Fee $3.650 Total Postage & Fees: $8.690 Postmark Here RULE 1.6.2(1)(B) Prior to the submittal of the application, a sign was erected at the entrance to the site that contains the required information dictated by Rule 1.6.2(1)(b). Please see attached sign certification. Marcovich Gravel Pit May 2024 Lewicki & Associates DATE , 2024 NOTICE THIS SITE KNOWN AS THE MARCOVICH MINING RESOURCE IS THE LOCATION OF A PROPOSED CONSTRUCTION MATERIALS OPERATION. ASPHALT SPECIALTIES CO., INC., WHOSE ADDRESS AND PHONE NUMBER IS 345 W. 62ND AVE., DENVER, COLORADO 80216 / (303) 289-8555, HAS APPLIED FOR A RECLAMATION PERMIT WITH THE COLORADO MINED LAND RECLAMATION BOARD. ANYONE WISHING TO COMMENT ON THE APPLICATION MAY VIEW THE APPLICATION AT THE WELD COUNTY CLERK AND RECORDER'S OFFICE, 1250 H STREET, GREELEY, COLORADO 80631, AND SHOULD SEND COMMENTS PRIOR TO THE END OF THE PUBLIC COMMENT PERIOD TO THE DIVISION OF RECLAMATION, MINING, AND SAFETY, 1313 SHERMAN ST, ROOM 215, DENVER, COLORADO 80203. Certification: I, Greg Geras, hereby certify that I posted a sign containing the above notice for the proposed permit area known as the Marcovich Mining Resource, on June 14, 2024. • SIGNATURE Sign posted on 6/14/24 on -site adjacent to HWY 85. NOTICE THIS SITE KNOWN AS THE MARC DVICH MINING RESOURCE IS THE LOCATION OF A PROPOSED CONSTRUCTION MATERIALS OPERATION. ASPHALT SPECIALTIES CO.. INC . WHOSE ADDRESS AND PHONE NUMBER IS 345W. 62ND AVE.. DENVER. COLORADO 80216/(3031289-8555. HAS APPLIED FOR A RECLAMATION PERMIT WITH THE COLORADO MINED LANE RECLAMATION BOARD. ANYONE WISHING TO COMMENT ON THE APPLICATION NAY VIEW THE APPLICATION ATTHE WILD COUNTY CLERK AND RECORDER'S OFFICE.1250 H STREET. GREELEY. COL0RA0080631. AND SHOULD SEND COWNLNTS PRIOR TOTHEENO OF THEPUBLIC COMMENT PERIOD TO THE DIVISION OF RECLAMATION. MINING. AND SAFETY. 1313 SH ERMAN ST. ROOM 215. DENVER. COLORADO 80103. RULE 6.5: GEOTECHNICAL STABILITY EXHIBIT There are no known geologic hazards on the proposed site. Based on a slope stability analysis, buildings or other structures within 200' of the Marcovich affected area will not be affected by mining excavation. Sufficient buffers will be maintained to structures. Maps C-3 and F-1 shows these buffers. Slurry walls installed prior to mining will be 30 -ft away from the edge of mining. Map C-3 shows the mining and reclamation slopes of the mine. A standard slope was analyzed for stability as it is a good example of the nearest structure, the slurry wall. The material properties are derived from Table 2.5 in the SME Mining Reference Handbook', as there is no site -specific strength data of the material available. Therefore, all materials are matched to a classification from this table that best matches the materials in terms of description. The native alluvial material is best classified as sand and gravel with a mixed grain size. A layer of overburden and sand lies atop the sand and gravel deposit. This material is best described as loose sand, mixed grain size. The bedrock is a soft sedimentary rock (claystone/siltstone) according to the SME Table 2.5. A summary of the material properties can be seen in Table 6.5-1. Table 6.5-1 Material Properties Material Unit Weight (Ibs/ft) Cohesion Friction Angle Sand and gravel, mixed grain size Loose sand, mixed grain size 110 0 45 99 0 34 Bedrocac 110 20,000 25.0 The final mining (1.5H:1V) and final reclamation (3H:1V) slopes were analyzed. Mining will be conducted at a near active highwall angle until the highwall has reached the half -way point of the final mining slope. Then the vertical active highwall slope will be knocked down to the final mining slope of 1.5H:1V. Then it will be backfilled with overburden/sand to the final reclamation slope of 3H:1V. The final mining and reclaimed slope crests will be the closest excavation comes to the slurry wall and any structures. 1. Mining and Reclamation Slopes Factor of Safety is expressed in terms of strength divided by stress as a ratio. It is arrived at by an iterative computer process where a slope failure is assumed, the strength and stress of that ' Original source: Hoek and Bray 1977 Marcovich May 2024 GS -1 Lewicki & Associates slope failure are calculated, and those values are compared to determine a lowest factor of safety. In the case of the Marcovich slope stability analysis, the Bishop's Method of Slices was the iterative calculation used, and the software GALENA was used to model slopes and calculate the factor of safety. One slope closest to major structures (see Figure GS -1) was analyzed to look at the factor of safety. Table GS -1 lists the analysis conducted and their respective factors of safety. GALENA data tables and analysis result figures are attached as Appendix GS -1. Figure GS -1. Locations of Slope Stability Analysis from Map F-1 N'iarcovkn May 2024, GS -2 Lewicki & Associates Figure GS -2. GALENA Cross Sections (Mining and Reclamation) GS -3 May .202-4 ULewicki 8& Associates Table GS -1. Factors of Safety for Slope Stability Slope Condition Final Reclamation Lowest Factor of Safety (static) 1.58 3.03 Lowest Factor of Safety Nearest Structure (seismic) 1.40 2.57 Slur wall Slurry wall 2. Conclusion The Final Reclamation slope has a minimum factor of safety (FoS = 3.03) of greater than 1.5 for static conditions. The Final Mining slope also has a minimum FoS greater than 1.5 (1.58) for static conditions. These Factors of Safety are greater than the CDRMS minimum for critical structure of 1.5. The seismic conditions analysis for both scenarios are similarly above the CDRMS minimums for critical structures: 1.40 > 1.3 and 1.57 > 1.3 The slope stability analysis in this permit has been prepared according to appropriate engineering standards and practices. Ben Langenfeld, P.E. P.E.# 0047151 Marcovich May 2024 GS -4 0 Lewicki & Associates APPENDIX GS -1 GALENA INFORMATION i oov'C GS -5 Lewicki & Associates Co a) ca 72 con C- O 0 0,4 U) m Q U) CO CO cr Critical Factor of Safety: I O O O O O O O co (o V N O O O) O) 0) 0) 6) f, -4- -4- V V V O O O O O O O OO CO V N O CO CO CO CO — CO to � ti -4- V V V V V V 0 O M N O O O O LC) Greg Lewicki and Associates U 0 U_ Co File: E:IWorkIGLA Dropbox\Ben LangenfeldlAsphalt SpecialtieslMarcovich\Slope StabilitylMarcovich Slope Stability.gmf 0 0 0 a) LIZ co E CO co 2 OB - loose sand, mixed 03 m Cl) — N .— (Q N U_ C d — Q E U T Cn L 7 Co Cl) C/O OE U a) Q c a — o Cr) Critical Factor of Safety: wo a I I I I I 0 l I I o aO0 GCoo V ON o cO0 O 0) Q) 6) O) 0) a0 U) V T V V V' V I I I I I O O O O O co, (0 V N O CO CD CO CO CO CO r- ti V O cn O O O Greg Lewicki and Associates • File: E IWorkIGLA Dropbox\Ben LangenfeldlAsphalt Specialties\MarcovichlSlope StabilitylMarcovich Slope Stability.gmf E ciLa E O Bedrock - claystone CC Critica/ Factor of Safety: W 0 O O CO o O O o CO co v N O O Q- tO V V V V -4- 0 0 0 O O 0 0 09 CO V N 0 CO CO CO CO CO OD CO r_ r• - - V V V V - O O M O U ) O O O Licensed to, Greg Lewicki and Associates File; E:IWorkIGLA DropboxlBen LangenfeldlAsphalt Specialties\Marcovich\Slope StabilitylMarcovich Slope Stability.gmf CO 03 CO c/) C./3 N CoCD cp = U Q E U cn a ca o v co -•-• co— c5 C) a,• • o Tts = n O : ,_ Q cis Critical Factor of Safety: I I I I I I O O O O I I I I I I I I O O O O O O O O O O O O O O co U) V C O C10 CO C' N O co co O Q) 6) C3) O) O) CO CO CO CO CO ti ✓ V V V V V V V V V' File: E:IWarkIGLA Drapbox\Ben Langenfeld\Asphalt Specialties\Marcovich\Slope StabilitylMarcovich Slope Stability.gmf GALENA 7.1 Analysis Results Version: 7.10.1.04 Licensee: Greg Lewicki and Associates Project: Marcovich File: E:\Work\GLA Dropbox\Ben Langenfeld\Asphalt Specialties\Marcovich\Slope Stability\Marcovich Slope Stability.gmf Processed: 03 May 2024 08:21:43 DATA: Analysis 1 - Mining Condition Material Properties (4 materials) Material: 1 (Mohr -Coulomb Isotropic) - Sand and gravel, mixed grain size Cohesion Phi UnitWeight Ru 0.00 45.0 110.00 Auto Material: 2 (Mohr -Coulomb Isotropic) - OB - loose sand, mixed grain size Cohesion Phi UnitWeight Ru 0.00 34.0 99.00 Auto Material: 3 (Mohr -Coulomb Isotropic) - Bedrock - claystone Cohesion Phi UnitWeight Ru 20000.00 25.0 110.00 Auto Material: 4 (Mohr -Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 0.0 112.00 Auto Saturated: 0.00 0.0 115.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 0.000 Material Profiles (4 profiles) Profile: 1 (2 points) Material beneath: 2 - OB - loose sand, mixed grain size 0.00 4900.00 300.00 4900.00 Profile: 2 (2 points) Material beneath: 1 - Sand and gravel, mixed grain size 0.00 4897.00 300.00 4897.00 Profile: 3 (2 points) Material beneath: 3 - Bedrock - claystone 0.00 4850.00 300.00 4850.00 Profile: 4 (5 points) Material within: 4 - Slurry Wall 65.00 4895.00 70.00 4895.00 70.00 4845.00 65.00 4845.00 65.00 4895.00 Slope Surface (4 points) 1.00 4897.00 100.00 4897.00 139.00 4872.00 300.00 4872.00 Phreatic Surface (2 points) 0.00 4895.00 66.00 4895.00 Piezometric Surfaces (1 surface) Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 100.90 YL: 4896.42 XR: 138.80 YR: 4872.13 Centre: XC: 143.94 YC: 4921.86 Radius: R: 50.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 25.00 20.00 10.50 Trial positions within range: 10 10 10 RESULTS: Analysis 1 - Mining Condition Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Factor of Safety for initial failure surface approximation: 1.759 There were: 705 successful analyses from a total of 1001 trial surfaces 296 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.58 Results Summary - Lowest 99 Factor of Safety circles Circle X -Left Y -Left X -Right Y -Right X -Centre Y -Centre Radius FoS 1 113.40 4888.41 128.80 4878.54 150.50 4929.35 55.25 1.584 <-- Critical Surface 2 113.40 4888.41 128.80 4878.54 149.87 4928.35 54.08 1.585 3 113.40 4888.41 128.80 4878.54 149.23 4927.35 52.92 1.586 4 113.40 4888.41 128.80 4878.54 148.59 4926.36 51.75 1.588 5 113.40 4888.41 128.80 4878.54 147.95 4925.36 50.58 1.589 6 113.40 4888.41 128.80 4878.54 147.31 4924.36 49.42 1.590 7 113.40 4888.41 131.02 4877.11 151.49 4928.43 55.25 1.592 8 113.40 4888.41 128.80 4878.54 146.67 4923.36 48.25 1.592 9 113.40 4888.41 131.02 4877.11 150.85 4927.43 54.08 1.593 10 113.40 4888.41 128.80 4878.54 146.02 4922.36 47.08 1.593 11 110.62 4890.19 128.80 4878.54 148.95 4929.98 55.25 1.594 12 113.40 4888.41 131.02 4877.11 150.20 4926.43 52.92 1.595 13 113.40 4888.41 128.80 4878.54 145.38 4921.36 45.92 1.595 14 110.62 4890.19 128.80 4878.54 148.31 4928.98 54.08 1.595 15 113.40 4888.41 131.02 4877.11 149.56 4925.43 51.75 1.596 16 110.62 4890.19 128.80 4878.54 147.67 4927.98 52.92 1.597 17 113.40 4888.41 128.80 4878.54 144.74 4920.35 44.75 1.597 18 113.40 4888.41 131.02 4877.11 148.92 4924.43 50.58 1.598 19 110.62 4890.19 128.80 4878.54 147.02 4926.97 51.75 1.599 20 113.40 4888.41 131.02 4877.11 148.27 4923.42 49.42 1.600 21 113.40 4888.41 133.24 4875.69 152.45 4927.49 55.25 1.601 22 110.62 4890.19 128.80 4878.54 146.38 4925.97 50.58 1.601 23 113.40 4888.41 131.02 4877.11 147.63 4922.42 48.25 1.602 24 113.40 4888.41 133.24 4875.69 151.81 4926.49 54.08 1.602 25 110.62 4890.19 128.80 4878.54 145.74 4924.96 49.42 1.603 26 110.62 4890.19 131.02 4877.11 149.91 4929.03 55.25 1.603 27 113.40 4888.41 131.02 4877.11 146.98 4921.41 47.08 1.604 28 113.40 4888.41 133.24 4875.69 151.16 4925.48 52.92 1.604 29 110.62 4890.19 128.80 4878.54 145.09 4923.96 48.25 1.605 30 110.62 4890.19 131.02 4877.11 149.27 4928.03 54.08 1.605 31 107.84 4891.97 128.80 4878.54 147.37 4930.57 55.25 1.605 32 113.40 4888.41 133.24 4875.69 150.52 4924.47 51.75 1.607 33 113.40 4888.41 131.02 4877.11 146.34 4920.40 45.92 1.607 34 110.62 4890.19 131.02 4877.11 148.62 4927.02 52.92 1.607 35 110.62 4890.19 128.80 4878.54 144.44 4922.95 47.08 1.607 36 107.84 4891.97 128.80 4878.54 146.73 4929.56 54.08 1.607 37 113.40 4888.41 133.24 4875.69 149.87 4923.46 50.58 1.609 38 113.40 4888.41 131.02 4877.11 145.69 4919.39 44.75 1.609 39 110.62 4890.19 131.02 4877.11 147.97 4926.01 51.75 1.609 40 110.62 4890.19 128.80 4878.54 143.80 4921.94 45.92 1.610 41 107.84 4891.97 128.80 4878.54 146.08 4928.55 52.92 1.610 42 113.40 4888.41 135.47 4874.27 153.40 4926.52 55.25 1.611 43 113.40 4888.41 133.24 4875.69 149.22 4922.45 49.42 1.611 44 110.62 4890.19 131.02 4877.11 147.33 4925.00 50.58 1.612 45 107.84 4891.97 128.80 4878.54 145.43 4927.54 51.75 1.612 46 110.62 4890.19 128.80 4878.54 143.15 4920.93 44.75 1.612 47 113.40 4888.41 135.47 4874.27 152.75 4925.51 54.08 1.613 48 110.62 4890.19 133.24 4875.69 150.85 4928.06 55.25 1.613 49 113.40 4888.41 133.24 4875.69 148.57 4921.44 48.25 1.614 50 110.62 4890.19 131.02 4877.11 146.68 4923.99 49.42 1.614 51 107.84 4891.97 128.80 4878.54 144.78 4926.53 50.58 1.615 52 113.40 4888.41 135.47 4874.27 152.10 4924.50 52.92 1.615 53 110.62 4890.19 133.24 4875.69 150.21 4927.04 54.08 1.616 54 107.84 4891.97 131.02 4877.11 148.31 4929.59 55.25 1.616 55 113.40 4888.41 133.24 4875.69 147.92 4920.43 47.08 1.617 56 110.62 4890.19 131.02 4877.11 146.03 4922.97 48.25 1.617 57 107.84 4891.97 128.80 4878.54 144.13 4925.52 49.42 1.617 58 113.40 4888.41 135.47 4874.27 151.45 4923.48 51.75 1.618 59 110.62 4890.19 133.24 4875.69 149.55 4926.03 52.92 1.618 60 107.84 4891.97 131.02 4877.11 147.66 4928.57 54.08 1.619 61 105.07 4893.75 128.80 4878.54 145.76 4931.12 55.25 1.619 62 113.40 4888.41 133.24 4875.69 147.27 4919.41 45.92 1.620 63 110.62 4890.19 131.02 4877.11 145.38 4921.96 47.08 1.620 64 107.84 4891.97 128.80 4878.54 143.48 4924.50 48.25 1.620 65 113.40 4888.41 135.47 4874.27 150.80 4922.47 50.58 1.621 66 110.62 4890.19 133.24 4875.69 148.90 4925.01 51.75 1.621 67 107.84 4891.97 131.02 4877.11 147.01 4927.56 52.92 1.621 68 105.07 4893.75 128.80 4878.54 145.11 4930.10 54.08 1.622 69 113.40 4888.41 137.69 4872.84 154.33 4925.53 55.25 1.622 70 113.40 4888.41 133.24 4875.69 146.62 4918.39 44.75 1.623 71 110.62 4890.19 131.02 4877.11 144.72 4920.94 45.92 1.623 72 107.84 4891.97 128.80 4878.54 142.83 4923.48 47.08 1.623 73 113.40 4888.41 135.47 4874.27 150.15 4921.45 49.42 1.624 74 110.62 4890.19 133.24 4875.69 148.25 4924.00 50.58 1.624 75 107.84 4891.97 131.02 4877.11 146.36 4926.54 51.75 1.624 76 105.07 4893.75 128.80 4878.54 144.46 4929.09 52.92 1.624 77 113.40 4888.41 137.69 4872.84 153.67 4924.51 54.08 1.625 78 110.62 4890.19 135.47 4874.27 151.78 4927.05 55.25 1.625 79 110.62 4890.19 131.02 4877.11 144.07 4919.92 44.75 1.627 80 107.84 4891.97 128.80 4878.54 142.17 4922.46 45.92 1.627 81 113.40 4888.41 135.47 4874.27 149.49 4920.43 48.25 1.627 82 110.62 4890.19 133.24 4875.69 147.60 4922.98 49.42 1.627 83 107.84 4891.97 131.02 4877.11 145.70 4925.52 50.58 1.627 84 105.07 4893.75 128.80 4878.54 143.80 4928.07 51.75 1.628 85 113.40 4888.41 137.69 4872.84 153.02 4923.49 52.92 1.628 86 110.62 4890.19 135.47 4874.27 151.12 4926.03 54.08 1.628 87 107.84 4891.97 133.24 4875.69 149.23 4928.58 55.25 1.628 88 107.84 4891.97 128.80 4878.54 141.52 4921.44 44.75 1.631 89 113.40 4888.41 135.47 4874.27 148.84 4919.41 47.08 1.631 90 110.62 4890.19 133.24 4875.69 146.94 4921.95 48.25 1.631 91 107.84 4891.97 131.02 4877.11 145.05 4924.50 49.42 1.631 92 105.07 4893.75 128.80 4878.54 143.15 4927.04 50.58 1.631 93 113.40 4888.41 137.69 4872.84 152.37 4922.47 51.75 1.631 94 110.62 4890.19 135.47 4874.27 150.47 4925.01 52.92 1.631 95 107.84 4891.97 133.24 4875.69 148.57 4927.56 54.08 1.631 96 105.07 4893.75 131.02 4877.11 146.68 4930.10 55.25 1.631 97 102.29 4895.53 128.80 4878.54 144.12 4931.62 55.25 1.634 98 105.07 4893.75 131.02 4877.11 146.02 4929.08 54.08 1.634 99 107.84 4891.97 133.24 4875.69 147.92 4926.53 52.92 1.634 Critical Failure Surface (circle 1) Intersects: XL: 113.40 YL: 4888.41 XR: 128.80 YR: 4878.54 Centre: XC: 150.50 YC: 4929.35 Radius: R: 55.25 Generated failure surface: (20 points) 113.40 4888.41 114.12 4887.77 114.86 4887.14 115.60 4886.52 116.36 4885.91 117.12 4885.32 117.90 4884.75 118.68 4884.18 119.48 4883.63 120.28 4883.10 121.10 4882.57 121.92 4882.07 122.75 4881.57 123.59 4881.09 124.44 4880.63 125.30 4880.18 126.16 4879.75 127.03 4879.33 127.91 4878.93 128.80 4878.54 Slice Geometry and Properties - Critical Failure Surface (circle 1, 38 slices) Slice X -S Base X -Left Area Angle Width Length Matl Factor 1 113.40 0.02 41.7 2 113.76 0.05 41.7 3 114.12 0.08 40.7 4 114.49 0.11 40.7 5 114.86 0.14 39.7 6 115.23 0.17 39.7 7 115.60 0.19 38.7 8 115.98 0.22 38.7 9 116.36 0.24 37.7 10 116.74 0.26 37.7 11 117.12 0.28 36.7 12 117.51 0.30 36.6 13 117.90 0.31 35.6 14 118.29 0.33 35.7 15 118.68 0.34 34.7 16 119.08 0.35 34.7 17 119.48 0.36 33.7 18 119.88 0.36 33.7 19 120.28 0.37 32.6 20 120.69 0.37 32.7 21 121.10 0.37 31.7 22 121.51 0.37 31.6 23 121.92 0.36 30.7 24 122.34 0.35 30.7 25 122.75 0.35 29.7 0.36 0.36 0.37 0.37 0.37 0.37 0.38 0.38 0.38 0.38 0.39 0.39 0.39 0.39 0.40 0.40 0.40 0.40 0.41 0.41 0.41 0.41 0.42 0.42 0.42 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 0.48 1 PoreWater Normal Test Cohesion Phi Weight Force Stress 0.00 45.0 1.78 0.00 3.16 0.86 0.00 45.0 5.37 0.00 9.52 0.86 0.00 45.0 8.88 0.00 15.70 0.85 0.00 45.0 12.13 0.00 21.44 0.85 0.00 45.0 15.39 0.00 27.15 0.85 0.00 45.0 18.25 0.00 32.19 0.85 0.00 45.0 21.21 0.00 37.32 0.85 0.00 45.0 23.72 0.00 41.74 0.85 0.00 45.0 26.38 0.00 46.33 0.85 0.00 45.0 28.49 0.00 50.03 0.85 0.00 45.0 30.81 0.00 54.02 0.85 0.00 45.0 32.52 0.00 57.05 0.85 0.00 45.0 34.46 0.00 60.38 0.85 0.00 45.0 35.77 0.00 62.64 0.85 0.00 45.0 37.32 0.00 65.29 0.85 0.00 45.0 38.18 0.00 66.82 0.85 0.00 45.0 39.33 0.00 68.78 0.85 0.00 45.0 39.76 0.00 69.54 0.85 0.00 45.0 40.43 0.00 70.72 0.85 0.00 45.0 40.46 0.00 70.72 0.85 0.00 45.0 40.66 0.00 71.09 0.85 0.00 45.0 40.20 0.00 70.32 0.85 0.00 45.0 39.95 0.00 69.89 0.85 0.00 45.0 39.04 0.00 68.28 0.85 0.00 45.0 38.26 0.00 66.97 0.85 26 123.17 0.34 29.7 0.42 0.48 1 0.00 45.0 36.86 0.00 64.52 0.85 27 123.59 0.32 28.7 0.42 0.48 1 0.00 45.0 35.56 0.00 62.30 0.85 28 124.02 0.31 28.7 0.42 0.48 1 0.00 45.0 33.71 0.00 59.06 0.85 29 124.44 0.29 27.6 0.43 0.48 1 0.00 45.0 31.89 0.00 55.96 0.85 30 124.87 0.27 27.7 0.43 0.48 1 0.00 45.0 29.52 0.00 51.77 0.85 31 125.30 0.25 26.6 0.43 0.48 1 0.00 45.0 27.16 0.00 47.73 0.85 32 125.73 0.22 26.6 0.43 0.48 1 0.00 45.0 24.31 0.00 42.71 0.85 33 126.16 0.19 25.7 0.44 0.48 1 0.00 45.0 21.38 0.00 37.63 0.85 34 126.60 0.16 25.6 0.44 0.48 1 0.00 45.0 18.01 0.00 31.71 0.85 35 127.03 0.13 24.6 0.44 0.48 1 0.00 45.0 14.52 0.00 25.61 0.85 36 127.47 0.10 24.6 0.44 0.48 1 0.00 45.0 10.67 0.00 18.83 0.85 37 127.91 0.06 23.6 0.44 0.48 1 0.00 45.0 6.59 0.00 11.66 0.86 38 128.36 0.02 23.6 0.44 0.48 1 0.00 45.0 2.21 0.00 3.91 0.86 X -S Area: 9.28 Path Length: 18.38 X -S Weight: 1021.15 DATA: Analysis 2 - Mining Condition Material Properties (4 materials) Material: 1 (Mohr -Coulomb Isotropic) - Sand and gravel, mixed grain size Cohesion Phi UnitWeight Ru 0.00 45.0 110.00 Auto Material: 2 (Mohr -Coulomb Isotropic) - OB - loose sand, mixed grain size Cohesion Phi UnitWeight Ru 0.00 34.0 99.00 Auto Material: 3 (Mohr -Coulomb Isotropic) - Bedrock - claystone Cohesion Phi UnitWeight Ru 20000.00 25.0 110.00 Auto Material: 4 (Mohr -Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 0.0 112.00 Auto Saturated: 0.00 0.0 115.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 0.000 Material Profiles (4 profiles) Profile: 1 (2 points) 0.00 4900.00 Profile: 2 (2 points) 0.00 4897.00 Profile: 3 (2 points) 0.00 4850.00 Profile: 4 (5 points) 65.00 4895.00 4895.00 Material beneath: 2 - OB - loose sand, mixed grain size 300.00 4900.00 Material beneath: 1 - Sand and gravel, mixed grain size 300.00 4897.00 Material beneath: 3 - Bedrock - claystone 300.00 4850.00 Material within: 4 - Slurry Wall 70.00 4895.00 70.00 4845.00 65.00 4845.00 65.00 Slope Surface (4 points) 1.00 4897.00 100.00 4897.00 139.00 4872.00 300.00 4872.00 Phreatic Surface (2 points) 0.00 4895.00 66.00 4895.00 Piezometric Surfaces (1 surface) Failure Surface (Critical, from previous analysis) Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 113.40 YL: 4888.41 XR: 128.80 YR: 4878.54 Centre: XC: 150.50 YC: 4929.35 Radius: R: 55.25 Earthquake Force Pseudo -static earthquake (seismic) coefficient: 0.050 Variable Restraints Parameter descriptor: XL XR R Range of variation: 25.00 20.00 10.50 Trial positions within range: 10 10 10 RESULTS: Analysis 2 - Mining Condition Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Factor of Safety for initial failure surface approximation: 1.423 There were: 881 successful analyses from a total of 1001 trial surfaces 120 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.40 Results Summary - Lowest 99 Factor of Safety circles Circle X -Left Y -Left X -Right Y -Right X -Centre Y -Centre Radius FoS 1 120.34 4883.96 123.24 4882.10 151.91 4930.01 55.83 1.401 <-- Critical Surface 2 120.34 4883.96 123.24 4882.10 153.17 4931.98 58.17 1.401 3 120.34 4883.96 123.24 4882.10 151.28 4929.03 54.67 1.401 4 120.34 4883.96 123.24 4882.10 152.54 4931.00 57.00 1.401 5 120.34 4883.96 123.24 4882.10 154.43 4933.94 60.50 1.401 6 120.34 4883.96 123.24 4882.10 153.80 4932.96 59.33 1.401 7 117.57 4885.74 121.02 4883.52 151.29 4934.56 59.33 1.401 8 120.34 4883.96 123.24 4882.10 149.39 4926.08 51.17 1.401 9 117.57 4885.74 121.02 4883.52 151.92 4935.54 60.50 1.401 10 120.34 4883.96 123.24 4882.10 150.65 4928.05 53.50 1.401 11 120.34 4883.96 123.24 4882.10 150.02 4927.06 52.33 1.401 12 117.57 4885.74 121.02 4883.52 150.66 4933.57 58.17 1.401 13 117.57 4885.74 121.02 4883.52 150.03 4932.59 57.00 1.401 14 117.57 4885.74 121.02 4883.52 148.77 4930.62 54.67 1.401 15 120.34 4883.96 123.24 4882.10 148.76 4925.10 50.00 1.401 16 117.57 4885.74 121.02 4883.52 148.14 4929.64 53.50 1.401 17 117.57 4885.74 121.02 4883.52 149.40 4931.61 55.83 1.401 18 125.90 4880.40 129.91 4877.83 160.53 4930.01 60.50 1.402 19 117.57 4885.74 121.02 4883.52 147.51 4928.66 52.33 1.402 20 117.57 4885.74 121.02 4883.52 146.25 4926.69 50.00 1.402 21 114.79 4887.52 118.80 4884.95 148.79 4936.15 59.33 1.402 22 117.57 4885.74 121.02 4883.52 146.88 4927.67 51.17 1.402 23 125.90 4880.40 129.91 4877.83 159.90 4929.02 59.33 1.402 24 114.79 4887.52 118.80 4884.95 149.42 4937.13 60.50 1.402 25 125.90 4880.40 129.91 4877.83 159.27 4928.04 58.17 1.402 26 114.79 4887.52 118.80 4884.95 148.16 4935.16 58.17 1.402 27 125.90 4880.40 129.91 4877.83 158.01 4926.07 55.83 1.402 28 114.79 4887.52 118.80 4884.95 146.27 4932.21 54.67 1.402 29 125.90 4880.40 129.91 4877.83 158.64 4927.06 57.00 1.402 30 114.79 4887.52 118.80 4884.95 146.90 4933.20 55.83 1.402 31 114.79 4887.52 118.80 4884.95 147.53 4934.18 57.00 1.402 32 125.90 4880.40 129.91 4877.83 157.38 4925.09 54.67 1.402 33 125.90 4880.40 129.91 4877.83 156.75 4924.11 53.50 1.402 34 114.79 4887.52 118.80 4884.95 145.64 4931.23 53.50 1.402 35 114.79 4887.52 118.80 4884.95 145.01 4930.25 52.33 1.402 36 123.12 4882.18 127.69 4879.25 158.03 4931.59 60.50 1.402 37 114.79 4887.52 118.80 4884.95 144.38 4929.26 51.17 1.402 38 123.12 4882.18 127.69 4879.25 157.40 4930.61 59.33 1.402 39 125.90 4880.40 129.91 4877.83 156.12 4923.12 52.33 1.402 40 123.12 4882.18 127.69 4879.25 156.76 4929.63 58.17 1.402 41 125.90 4880.40 129.91 4877.83 155.49 4922.14 51.17 1.402 42 123.12 4882.18 127.69 4879.25 156.13 4928.65 57.00 1.402 43 114.79 4887.52 118.80 4884.95 143.75 4928.28 50.00 1.402 44 125.90 4880.40 129.91 4877.83 154.86 4921.16 50.00 1.402 45 123.12 4882.18 127.69 4879.25 154.87 4926.68 54.67 1.402 46 123.12 4882.18 127.69 4879.25 155.50 4927.66 55.83 1.402 47 123.12 4882.18 127.69 4879.25 154.24 4925.70 53.50 1.402 48 120.34 4883.96 125.47 4880.68 155.51 4933.19 60.50 1.402 49 120.34 4883.96 125.47 4880.68 154.88 4932.20 59.33 1.402 50 123.12 4882.18 127.69 4879.25 153.61 4924.71 52.33 1.402 51 120.34 4883.96 125.47 4880.68 154.25 4931.22 58.17 1.403 52 123.12 4882.18 127.69 4879.25 152.98 4923.73 51.17 1.403 53 120.34 4883.96 125.47 4880.68 153.62 4930.24 57.00 1.403 54 120.34 4883.96 125.47 4880.68 152.99 4929.25 55.83 1.403 55 123.12 4882.18 127.69 4879.25 152.35 4922.74 50.00 1.403 56 120.34 4883.96 125.47 4880.68 152.36 4928.27 54.67 1.403 57 117.57 4885.74 123.24 4882.10 153.00 4934.77 60.50 1.403 58 120.34 4883.96 125.47 4880.68 151.73 4927.29 53.50 1.403 59 117.57 4885.74 123.24 4882.10 152.37 4933.79 59.33 1.403 60 117.57 4885.74 123.24 4882.10 151.74 4932.81 58.17 1.403 61 120.34 4883.96 125.47 4880.68 151.10 4926.30 52.33 1.403 62 117.57 4885.74 123.24 4882.10 151.11 4931.82 57.00 1.403 63 120.34 4883.96 125.47 4880.68 150.47 4925.32 51.17 1.403 64 125.90 4880.40 132.13 4876.40 161.60 4929.24 60.50 1.403 65 114.79 4887.52 121.02 4883.52 150.49 4936.36 60.50 1.403 66 117.57 4885.74 123.24 4882.10 150.48 4930.84 55.83 1.403 67 120.34 4883.96 125.47 4880.68 149.84 4924.33 50.00 1.403 68 117.57 4885.74 123.24 4882.10 149.85 4929.85 54.67 1.403 69 117.57 4885.74 123.24 4882.10 149.22 4928.87 53.50 1.403 70 125.90 4880.40 132.13 4876.40 160.97 4928.25 59.33 1.403 71 114.79 4887.52 121.02 4883.52 149.86 4935.38 59.33 1.404 72 125.90 4880.40 132.13 4876.40 160.34 4927.27 58.17 1.404 73 114.79 4887.52 121.02 4883.52 149.23 4934.39 58.17 1.404 74 117.57 4885.74 123.24 4882.10 148.59 4927.89 52.33 1.404 75 125.90 4880.40 132.13 4876.40 159.71 4926.29 57.00 1.404 76 114.79 4887.52 121.02 4883.52 148.60 4933.41 57.00 1.404 77 114.79 4887.52 121.02 4883.52 147.97 4932.42 55.83 1.404 78 117.57 4885.74 123.24 4882.10 147.96 4926.90 51.17 1.404 79 125.90 4880.40 132.13 4876.40 159.08 4925.30 55.83 1.404 80 123.12 4882.18 129.91 4877.83 159.09 4930.82 60.50 1.404 81 112.01 4889.30 118.80 4884.95 147.98 4937.94 60.50 1.404 82 117.57 4885.74 123.24 4882.10 147.33 4925.92 50.00 1.404 83 123.12 4882.18 129.91 4877.83 158.46 4929.84 59.33 1.404 84 125.90 4880.40 132.13 4876.40 158.45 4924.32 54.67 1.404 85 114.79 4887.52 121.02 4883.52 147.34 4931.44 54.67 1.404 86 112.01 4889.30 118.80 4884.95 147.35 4936.96 59.33 1.404 87 123.12 4882.18 129.91 4877.83 157.83 4928.85 58.17 1.404 88 112.01 4889.30 118.80 4884.95 146.72 4935.98 58.17 1.404 89 125.90 4880.40 132.13 4876.40 157.82 4923.33 53.50 1.404 90 114.79 4887.52 121.02 4883.52 146.71 4930.46 53.50 1.404 91 123.12 4882.18 129.91 4877.83 157.20 4927.87 57.00 1.404 92 114.79 4887.52 121.02 4883.52 146.08 4929.47 52.33 1.404 93 112.01 4889.30 118.80 4884.95 146.09 4934.99 57.00 1.404 94 125.90 4880.40 132.13 4876.40 157.19 4922.35 52.33 1.404 95 123.12 4882.18 129.91 4877.83 156.57 4926.88 55.83 1.405 96 112.01 4889.30 118.80 4884.95 145.46 4934.01 55.83 1.405 97 125.90 4880.40 132.13 4876.40 156.56 4921.36 51.17 1.405 98 120.34 4883.96 127.69 4879.25 156.58 4932.41 60.50 1.405 99 114.79 4887.52 121.02 4883.52 145.45 4928.49 51.17 1.405 Critical Failure Surface (circle 1) Intersects: XL: 120.34 YL: 4883.96 XR: 123.24 YR: 4882.10 Centre: XC: 151.91 YC: 4930.01 Radius: R: 55.83 Generated failure surface: (20 points) 120.34 4883.96 120.49 4883.86 120.64 4883.75 120.79 4883.65 120.95 4883.55 121.10 4883.45 121.25 4883.35 121.40 4883.25 121.55 4883.15 121.70 4883.06 121.86 4882.96 122.01 4882.86 122.16 4882.76 122.32 4882.67 122.47 4882.57 122.62 4882.48 122.78 4882.38 122.93 4882.29 123.09 4882.19 123.24 4882.10 Slice Geometry and Properties - Critical Failure Surface (circle 1, 38 slices) Slice X -S ----------------- Base PoreWater Normal Test X -Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 120.34 0.00 34.4 0.07 0.09 1 0.00 45.0 0.02 0.00 0.14 0.81 2 120.42 0.00 34.4 0.07 0.09 1 0.00 45.0 0.04 0.00 0.36 0.81 3 120.49 0.00 34.1 0.08 0.09 1 0.00 45.0 0.07 0.00 0.62 0.81 4 120.57 0.00 34.1 0.08 0.09 1 0.00 45.0 0.09 0.00 0.80 0.81 5 120.64 0.00 33.8 0.08 0.09 1 0.00 45.0 0.11 0.00 0.98 0.81 6 120.72 0.00 34.0 0.08 0.09 1 0.00 45.0 0.13 0.00 1.16 0.81 7 120.79 0.00 34.0 0.08 0.09 1 0.00 45.0 0.15 0.00 1.34 0.81 8 120.87 0.00 33.7 0.08 0.09 1 0.00 45.0 0.17 0.00 1.49 0.81 9 120.95 0.00 33.4 0.08 0.09 1 0.00 45.0 0.18 0.00 1.64 0.81 10 121.02 0.00 33.7 0.08 0.09 1 0.00 45.0 0.20 0.00 1.78 0.81 11 121.10 0.00 33.6 0.08 0.09 1 0.00 45.0 0.21 0.00 1.89 0.81 12 121.17 0.00 33.4 0.08 0.09 1 0.00 45.0 0.22 0.00 2.01 0.81 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 121.25 121.32 121.40 121.48 121.55 121.63 121.70 121.78 121.86 121.93 122.01 122.09 122.16 122.24 122.32 122.39 122.47 122.55 122.62 122.70 122.78 122.86 122.93 123.01 123.09 123.17 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 33.0 33.3 33.2 33.0 32.9 32.7 32.6 32.6 32.6 32.6 32.2 32.2 32.2 32.2 31.9 31.9 31.8 31.6 31.5 31.5 31.5 31.5 31.1 31.1 30.8 31.1 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.00 45.0 0.24 0.00 2.13 0.81 0.00 45.0 0.24 0.00 2.16 0.81 0.00 45.0 0.25 0.00 2.23 0.81 0.00 45.0 0.26 0.00 2.31 0.81 0.00 45.0 0.26 0.00 2.35 0.81 0.00 45.0 0.27 0.00 2.40 0.81 0.00 45.0 0.27 0.00 2.40 0.81 0.00 45.0 0.26 0.00 2.36 0.81 0.00 45.0 0.26 0.00 2.36 0.82 0.00 45.0 0.26 0.00 2.36 0.82 0.00 45.0 0.26 0.00 2.30 0.82 0.00 45.0 0.26 0.00 2.30 0.82 0.00 45.0 0.24 0.00 2.19 0.82 0.00 45.0 0.24 0.00 2.15 0.82 0.00 45.0 0.23 0.00 2.05 0.82 0.00 45.0 0.21 0.00 1.93 0.82 0.00 45.0 0.20 0.00 1.82 0.82 0.00 45.0 0.19 0.00 1.68 0.82 0.00 45.0 0.17 0.00 1.53 0.82 0.00 45.0 0.15 0.00 1.35 0.82 0.00 45.0 0.13 0.00 1.20 0.82 0.00 45.0 0.11 0.00 1.01 0.82 0.00 45.0 0.09 0.00 0.83 0.82 0.00 45.0 0.07 0.00 0.60 0.82 0.00 45.0 0.04 0.00 0.38 0.82 0.00 45.0 0.01 0.00 0.11 0.82 X -S Area: 0.06 Path Length: 3.45 X -S Weight: 6.75 DATA: Analysis 3 - Reclaimed Condition Material Properties (4 materials) Material: 1 (Mohr -Coulomb Isotropic) - Sand and gravel, mixed grain size Cohesion Phi UnitWeight Ru 0.00 45.0 110.00 Auto Material: 2 (Mohr -Coulomb Isotropic) - OB - loose sand, mixed grain size Cohesion Phi UnitWeight Ru 0.00 34.0 99.00 Auto Material: 3 (Mohr -Coulomb Isotropic) - Bedrock - claystone Cohesion Phi UnitWeight Ru 20000.00 25.0 110.00 Auto Material: 4 (Mohr -Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 0.0 112.00 Auto Saturated: 0.00 0.0 115.00 Auto Water Properties Unit weight of water: 62.400 Material Profiles (4 profiles) Profile: 1 (2 points) 0.00 4900.00 Profile: 2 (2 points) 0.00 4897.00 Profile: 3 (2 points) 0.00 4850.00 Profile: 4 (5 points) 65.00 4895.00 4895.00 Unit weight of water/medium above ground: 0.000 Material beneath: 2 - OB - loose sand, mixed grain size 300.00 4900.00 Material beneath: 1 - Sand and gravel, mixed grain size 300.00 4897.00 Material beneath: 3 - Bedrock - claystone 300.00 4850.00 Material within: 4 - Slurry Wall 70.00 4895.00 70.00 4845.00 65.00 4845.00 65.00 Slope Surface (4 points) 1.00 4897.00 100.00 4897.00 175.00 4872.00 300.00 4872.00 Phreatic Surface (2 points) 0.00 4895.00 66.00 4895.00 Piezometric Surfaces (1 surface) Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 100.10 YL: 4896.97 XR: 149.10 YR: 4880.63 Centre: XC: 146.87 YC: 4955.60 Radius: R: 75.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 25.00 25.00 20.00 Trial positions within range: 20 20 10 RESULTS: Analysis 3 - Reclaimed Condition Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Factor of Safety for initial failure surface approximation: 3.170 There were: 4001 successful analyses from a total of 4001 trial surfaces Critical (minimum) Factor of Safety: 3.03 Results Summary - Lowest 99 Factor of Safety circles Circle X -Left Y -Left X -Right Y -Right X -Centre Y -Centre Radius FoS 1 112.60 4892.80 136.60 4884.80 151.18 4968.54 85.00 3.030 <-- Critical Surface 2 112.60 4892.80 136.60 4884.80 150.47 4966.41 82.78 3.032 3 112.60 4892.80 137.92 4884.36 151.80 4968.22 85.00 3.033 4 111.28 4893.24 136.60 4884.80 150.49 4968.66 85.00 3.033 5 112.60 4892.80 136.60 4884.80 149.76 4964.27 80.56 3.033 6 112.60 4892.80 137.92 4884.36 151.09 4966.08 82.78 3.035 7 111.28 4893.24 136.60 4884.80 149.78 4966.52 82.78 3.035 8 112.60 4892.80 136.60 4884.80 149.05 4962.14 78.33 3.035 9 109.97 4893.68 136.60 4884.80 149.80 4968.77 85.00 3.037 10 111.28 4893.24 137.92 4884.36 151.11 4968.33 85.00 3.037 11 112.60 4892.80 139.23 4883.92 152.43 4967.89 85.00 3.037 12 111.28 4893.24 136.60 4884.80 149.07 4964.39 80.56 3.037 13 112.60 4892.80 137.92 4884.36 150.38 4963.95 80.56 3.037 14 112.60 4892.80 136.60 4884.80 148.33 4960.00 76.11 3.038 15 112.60 4892.80 139.23 4883.92 151.71 4965.75 82.78 3.039 16 111.28 4893.24 137.92 4884.36 150.40 4966.19 82.78 3.039 17 109.97 4893.68 136.60 4884.80 149.08 4966.63 82.78 3.039 18 111.28 4893.24 136.60 4884.80 148.35 4962.25 78.33 3.039 19 112.60 4892.80 137.92 4884.36 149.67 4961.81 78.33 3.039 20 112.60 4892.80 136.60 4884.80 147.62 4957.86 73.89 3.040 21 109.97 4893.68 137.92 4884.36 150.42 4968.44 85.00 3.041 22 111.28 4893.24 139.23 4883.92 151.73 4968.00 85.00 3.041 23 108.65 4894.12 136.60 4884.80 149.10 4968.88 85.00 3.041 24 112.60 4892.80 140.55 4883.48 153.05 4967.56 85.00 3.041 25 112.60 4892.80 139.23 4883.92 151.00 4963.61 80.56 3.041 26 111.28 4893.24 137.92 4884.36 149.68 4964.05 80.56 3.041 27 109.97 4893.68 136.60 4884.80 148.37 4964.49 80.56 3.041 28 112.60 4892.80 137.92 4884.36 148.95 4959.67 76.11 3.042 29 111.28 4893.24 136.60 4884.80 147.64 4960.11 76.11 3.042 30 112.60 4892.80 136.60 4884.80 146.91 4955.72 71.67 3.042 31 108.65 4894.12 136.60 4884.80 148.39 4966.73 82.78 3.043 32 111.28 4893.24 139.23 4883.92 151.02 4965.86 82.78 3.043 33 109.97 4893.68 137.92 4884.36 149.70 4966.30 82.78 3.043 34 112.60 4892.80 140.55 4883.48 152.33 4965.42 82.78 3.043 35 112.60 4892.80 139.23 4883.92 150.29 4961.47 78.33 3.044 36 109.97 4893.68 136.60 4884.80 147.66 4962.35 78.33 3.044 37 111.28 4893.24 137.92 4884.36 148.97 4961.91 78.33 3.044 38 112.60 4892.80 137.92 4884.36 148.24 4957.53 73.89 3.044 39 111.28 4893.24 136.60 4884.80 146.92 4957.96 73.89 3.044 40 111.28 4893.24 140.55 4883.48 152.35 4967.66 85.00 3.045 41 109.97 4893.68 139.23 4883.92 151.03 4968.10 85.00 3.045 42 107.34 4894.55 136.60 4884.80 148.40 4968.98 85.00 3.045 43 108.65 4894.12 137.92 4884.36 149.72 4968.54 85.00 3.045 44 112.60 4892.80 141.86 4883.05 153.66 4967.22 85.00 3.045 45 112.60 4892.80 136.60 4884.80 146.19 4953.58 69.44 3.045 46 108.65 4894.12 136.60 4884.80 147.67 4964.59 80.56 3.045 47 109.97 4893.68 137.92 4884.36 148.99 4964.15 80.56 3.045 48 111.28 4893.24 139.23 4883.92 150.30 4963.71 80.56 3.046 49 112.60 4892.80 140.55 4883.48 151.62 4963.28 80.56 3.046 50 112.60 4892.80 139.23 4883.92 149.57 4959.33 76.11 3.046 51 111.28 4893.24 137.92 4884.36 148.26 4959.77 76.11 3.046 52 109.97 4893.68 136.60 4884.80 146.94 4960.21 76.11 3.046 53 111.28 4893.24 136.60 4884.80 146.21 4955.82 71.67 3.047 54 112.60 4892.80 137.92 4884.36 147.52 4955.38 71.67 3.047 55 111.28 4893.24 140.55 4883.48 151.63 4965.52 82.78 3.047 56 109.97 4893.68 139.23 4883.92 150.32 4965.96 82.78 3.047 57 112.60 4892.80 141.86 4883.05 152.95 4965.08 82.78 3.047 58 107.34 4894.55 136.60 4884.80 147.69 4966.83 82.78 3.047 59 108.65 4894.12 137.92 4884.36 149.00 4966.39 82.78 3.047 60 108.65 4894.12 136.60 4884.80 146.96 4962.45 78.33 3.048 61 111.28 4893.24 139.23 4883.92 149.59 4961.57 78.33 3.048 62 109.97 4893.68 137.92 4884.36 148.27 4962.01 78.33 3.048 63 112.60 4892.80 140.55 4883.48 150.90 4961.13 78.33 3.048 64 112.60 4892.80 136.60 4884.80 145.48 4951.43 67.22 3.048 65 112.60 4892.80 143.18 4882.61 154.28 4966.88 85.00 3.049 66 108.65 4894.12 139.23 4883.92 150.33 4968.19 85.00 3.049 67 109.97 4893.68 140.55 4883.48 151.65 4967.76 85.00 3.049 68 107.34 4894.55 137.92 4884.36 149.02 4968.63 85.00 3.049 69 111.28 4893.24 141.86 4883.05 152.97 4967.32 85.00 3.049 70 106.02 4894.99 136.60 4884.80 147.70 4969.07 85.00 3.049 71 111.28 4893.24 137.92 4884.36 147.54 4957.62 73.89 3.049 72 109.97 4893.68 136.60 4884.80 146.23 4958.06 73.89 3.049 73 112.60 4892.80 139.23 4883.92 148.86 4957.18 73.89 3.049 74 108.65 4894.12 137.92 4884.36 148.29 4964.25 80.56 3.050 75 107.34 4894.55 136.60 4884.80 146.97 4964.69 80.56 3.050 76 111.28 4893.24 140.55 4883.48 150.92 4963.37 80.56 3.050 77 109.97 4893.68 139.23 4883.92 149.60 4963.81 80.56 3.050 78 112.60 4892.80 141.86 4883.05 152.23 4962.93 80.56 3.050 79 111.28 4893.24 136.60 4884.80 145.49 4953.67 69.44 3.050 80 112.60 4892.80 137.92 4884.36 146.81 4953.23 69.44 3.050 81 111.28 4893.24 139.23 4883.92 148.87 4959.42 76.11 3.051 82 109.97 4893.68 137.92 4884.36 147.56 4959.86 76.11 3.051 83 108.65 4894.12 136.60 4884.80 146.24 4960.30 76.11 3.051 84 112.60 4892.80 140.55 4883.48 150.19 4958.98 76.11 3.051 85 109.97 4893.68 140.55 4883.48 150.93 4965.61 82.78 3.052 86 108.65 4894.12 139.23 4883.92 149.62 4966.05 82.78 3.052 87 112.60 4892.80 136.60 4884.80 144.76 4949.29 65.00 3.052 88 111.28 4893.24 141.86 4883.05 152.25 4965.17 82.78 3.052 89 106.02 4894.99 136.60 4884.80 146.99 4966.92 82.78 3.052 90 107.34 4894.55 137.92 4884.36 148.30 4966.48 82.78 3.052 91 112.60 4892.80 143.18 4882.61 153.56 4964.73 82.78 3.052 92 109.97 4893.68 136.60 4884.80 145.51 4955.91 71.67 3.052 93 112.60 4892.80 139.23 4883.92 148.14 4955.03 71.67 3.052 94 111.28 4893.24 137.92 4884.36 146.82 4955.47 71.67 3.052 95 109.97 4893.68 139.23 4883.92 148.89 4961.66 78.33 3.053 96 108.65 4894.12 137.92 4884.36 147.57 4962.10 78.33 3.053 97 111.28 4893.24 140.55 4883.48 150.20 4961.22 78.33 3.053 98 112.60 4892.80 141.86 4883.05 151.52 4960.78 78.33 3.053 99 107.34 4894.55 136.60 4884.80 146.25 4962.54 78.33 3.053 Critical Failure Surface (circle 1) Intersects: XL: 112.60 YL: 4892.80 XR: 136.60 YR: 4884.80 Centre: XC: 151.18 YC: 4968.54 Radius: R: 85.00 Generated failure surface: (20 points) 112.60 4892.80 113.80 4892.20 115.00 4891.62 116.21 4891.06 117.44 4890.52 118.67 4890.00 119.91 4889.50 121.15 4889.02 122.41 4888.56 123.67 4888.12 124.94 4887.69 126.21 4887.29 127.49 4886.91 128.78 4886.55 130.07 4886.20 131.37 4885.88 132.67 4885.58 133.97 4885.30 135.29 4885.04 136.60 4884.80 Slice Geometry and Properties - Critical Failure Surface (circle 1, 38 slices) Slice X -S ----------------- Base PoreWater Normal Test X -Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 112.60 0.03 26.6 0.60 0.67 1 0.00 45.0 3.28 0.00 4.70 0.96 2 113.20 0.09 26.5 0.60 0.67 1 0.00 45.0 9.79 0.00 14.07 0.96 3 113.80 0.15 25.6 0.60 0.67 1 0.00 45.0 16.11 0.00 23.09 0.96 4 114.40 0.20 25.6 0.60 0.67 1 0.00 45.0 21.94 0.00 31.44 0.96 5 115.00 6 115.61 7 116.21 8 116.83 9 117.44 10 118.05 11 118.67 12 119.29 13 119.91 14 120.53 15 121.15 16 121.78 17 122.41 18 123.04 19 123.67 20 124.30 21 124.94 22 125.57 23 126.21 24 126.85 25 127.49 26 128.13 27 128.78 28 129.42 29 130.07 30 130.72 31 131.37 32 132.02 33 132.67 34 133.32 35 133.97 36 134.63 37 135.29 0.25 0.30 0.34 0.38 0.43 0.46 0.49 0.52 0.55 0.57 0.59 0.60 0.62 0.62 0.63 0.63 0.63 0.62 0.62 0.60 0.59 0.57 0.54 0.51 0.48 0.45 0.41 0.37 0.32 0.27 0.22 0.16 0.10 24.8 24.8 23.8 23.8 22.9 23.0 22.1 22.0 21.1 21.2 20.3 20.2 19.3 19.3 18.4 18.4 17.6 17.5 16.6 16.6 15.7 15.8 14.8 14.8 13.9 14.0 13.0 13.0 12.1 12.1 11.2 11.2 10.3 0.61 0.61 0.61 0.61 0.62 0.62 0.62 0.62 0.62 0.62 0.63 0.63 0.63 0.63 0.63 0.63 0.64 0.64 0.64 0.64 0.64 0.64 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.66 0.66 0.66 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 0.67 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 27.67 32.79 37.88 42.32 46.77 50.47 54.23 57.22 60.26 62.53 64.82 66.34 67.87 68.61 69.39 69.39 69.34 68.58 67.75 66.16 64.53 62.18 59.71 56.55 53.23 49.26 45.07 40.35 35.34 29.76 23.87 17.53 10.80 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 39.58 46.90 54.10 60.42 66.69 71.95 77.22 81.50 85.75 88.97 92.17 94.34 96.47 97.53 98.61 98.63 98.53 97.48 96.33 94.06 91.80 88.44 85.01 80.52 75.87 70.19 64.31 57.59 50.50 42.54 34.18 25.10 15.50 0.96 0.96 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.95 0.96 0.96 0.96 0.96 0.96 38 135.94 0.03 10.4 0.66 0.67 1 0.00 45.0 3.60 0.00 5.17 0.96 X -S Area: 15.94 Path Length: 25.39 X -S Weight: 1753.30 DATA: Analysis 4 - Reclaimed Condition Material Properties (4 materials) Material: 1 (Mohr -Coulomb Isotropic) - Sand and gravel, mixed grain size Cohesion Phi UnitWeight Ru 0.00 45.0 110.00 Auto Material: 2 (Mohr -Coulomb Isotropic) - OB - loose sand, mixed grain size Cohesion Phi UnitWeight Ru 0.00 34.0 99.00 Auto Material: 3 (Mohr -Coulomb Isotropic) - Bedrock - claystone Cohesion Phi UnitWeight Ru 20000.00 25.0 110.00 Auto Material: 4 (Mohr -Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 0.0 112.00 Auto Saturated: 0.00 0.0 115.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 0.000 Material Profiles (4 profiles) Profile: 1 (2 points) Material beneath: 2 - OB - loose sand, mixed grain size 0.00 4900.00 300.00 4900.00 Profile: 2 (2 points) Material beneath: 1 - Sand and gravel, mixed grain size 0.00 4897.00 300.00 4897.00 Profile: 3 (2 points) Material beneath: 3 - Bedrock - claystone 0.00 4850.00 300.00 4850.00 Profile: 4 (5 points) Material within: 4 - Slurry Wall 65.00 4895.00 70.00 4895.00 70.00 4845.00 65.00 4845.00 65.00 4895.00 Slope Surface (4 points) 1.00 4897.00 100.00 4897.00 175.00 4872.00 300.00 4872.00 Phreatic Surface (2 points) 0.00 4895.00 66.00 4895.00 Piezometric Surfaces (1 surface) Failure Surface (Critical, from previous analysis) Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 112.60 YL: 4892.80 XR: 136.60 YR: 4884.80 Centre: XC: 151.18 YC: 4968.54 Radius: R: 85.00 Earthquake Force Pseudo -static earthquake (seismic) coefficient: 0.050 Variable Restraints Parameter descriptor: XL XR R Range of variation: 25.00 25.00 20.00 Trial positions within range: 20 20 10 RESULTS: Analysis 4 - Reclaimed Condition Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Factor of Safety for initial failure surface approximation: 2.592 There were: 3896 successful analyses from a total of 4001 trial surfaces 105 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.57 Results Summary - Lowest 99 Factor of Safety circles Circle X -Left Y -Left X -Right Y -Right X -Centre Y -Centre Radius FoS 1 121.15 4889.95 125.42 4888.53 153.32 4979.34 95.00 2.565 <-- Critical Surface 2 122.47 4889.51 126.73 4888.09 154.64 4978.90 95.00 2.565 3 121.15 4889.95 125.42 4888.53 152.62 4977.23 92.78 2.565 4 122.47 4889.51 126.73 4888.09 152.53 4972.57 88.33 2.566 5 122.47 4889.51 126.73 4888.09 153.23 4974.68 90.56 2.566 6 122.47 4889.51 126.73 4888.09 151.83 4970.46 86.11 2.566 7 122.47 4889.51 126.73 4888.09 153.94 4976.79 92.78 2.566 8 121.15 4889.95 125.42 4888.53 151.21 4973.01 88.33 2.566 9 119.84 4890.39 124.10 4888.97 149.19 4971.34 86.11 2.566 10 123.78 4889.07 128.05 4887.65 151.73 4965.81 81.67 2.566 11 125.10 4888.63 129.36 4887.21 155.86 4973.81 90.56 2.566 12 119.84 4890.39 124.10 4888.97 147.78 4967.12 81.67 2.566 13 121.15 4889.95 125.42 4888.53 151.92 4975.12 90.56 2.566 14 125.10 4888.63 129.36 4887.21 156.56 4975.91 92.78 2.566 15 123.78 4889.07 128.05 4887.65 153.84 4972.14 88.33 2.566 16 123.78 4889.07 128.05 4887.65 155.95 4978.46 95.00 2.566 17 125.10 4888.63 130.68 4886.77 157.92 4977.78 95.00 2.566 18 119.84 4890.39 124.10 4888.97 148.48 4969.23 83.89 2.566 19 122.47 4889.51 126.73 4888.09 148.31 4959.92 75.00 2.566 20 123.78 4889.07 128.05 4887.65 149.62 4959.48 75.00 2.566 21 123.78 4889.07 128.05 4887.65 154.54 4974.24 90.56 2.566 22 122.47 4889.51 126.73 4888.09 150.42 4966.24 81.67 2.566 23 121.15 4889.95 125.42 4888.53 148.40 4964.57 79.44 2.566 24 121.15 4889.95 125.42 4888.53 150.51 4970.90 86.11 2.566 25 119.84 4890.39 124.10 4888.97 147.08 4965.02 79.44 2.566 26 125.10 4888.63 129.36 4887.21 153.04 4965.37 81.67 2.566 27 122.47 4889.51 126.73 4888.09 151.12 4968.35 83.89 2.566 28 121.15 4889.95 125.42 4888.53 149.11 4966.68 81.67 2.566 29 125.10 4888.63 129.36 4887.21 154.45 4969.59 86.11 2.566 30 122.47 4889.51 126.73 4888.09 149.72 4964.14 79.44 2.566 31 125.10 4888.63 129.36 4887.21 155.15 4971.70 88.33 2.566 32 121.15 4889.95 125.42 4888.53 147.70 4962.47 77.22 2.566 33 121.15 4889.95 125.42 4888.53 147.00 4960.36 75.00 2.566 34 121.15 4889.95 126.73 4888.09 153.97 4979.10 95.00 2.566 35 121.15 4889.95 125.42 4888.53 149.81 4968.79 83.89 2.566 36 123.78 4889.07 128.05 4887.65 150.32 4961.59 77.22 2.566 37 119.84 4890.39 125.42 4888.53 152.66 4979.54 95.00 2.566 38 123.78 4889.07 128.05 4887.65 155.24 4976.35 92.78 2.566 39 123.78 4889.07 128.05 4887.65 152.43 4967.92 83.89 2.566 40 123.78 4889.07 129.36 4887.21 153.08 4967.68 83.89 2.566 41 118.52 4890.83 124.10 4888.97 150.63 4977.87 92.78 2.566 42 125.10 4888.63 129.36 4887.21 153.75 4967.48 83.89 2.566 43 125.10 4888.63 129.36 4887.21 152.34 4963.26 79.44 2.566 44 123.78 4889.07 129.36 4887.21 155.89 4976.12 92.78 2.566 45 123.78 4889.07 128.05 4887.65 153.13 4970.03 86.11 2.566 46 122.47 4889.51 126.73 4888.09 149.01 4962.03 77.22 2.566 47 119.84 4890.39 124.10 4888.97 145.67 4960.80 75.00 2.566 48 122.47 4889.51 128.05 4887.65 153.18 4972.33 88.33 2.566 49 118.52 4890.83 124.10 4888.97 148.52 4971.54 86.11 2.566 50 121.15 4889.95 126.73 4888.09 151.86 4972.77 88.33 2.566 51 121.15 4889.95 126.73 4888.09 153.27 4976.99 92.78 2.566 52 122.47 4889.51 128.05 4887.65 153.88 4974.44 90.56 2.566 53 119.84 4890.39 125.42 4888.53 148.44 4966.88 81.67 2.566 54 118.52 4890.83 124.10 4888.97 149.93 4975.76 90.56 2.566 55 119.84 4890.39 124.10 4888.97 146.38 4962.91 77.22 2.566 56 123.78 4889.07 129.36 4887.21 152.38 4965.57 81.67 2.566 57 121.15 4889.95 126.73 4888.09 152.57 4974.88 90.56 2.566 58 122.47 4889.51 128.05 4887.65 155.29 4978.66 95.00 2.566 59 125.10 4888.63 130.68 4886.77 155.81 4971.46 88.33 2.566 60 125.10 4888.63 130.68 4886.77 156.51 4973.57 90.56 2.566 61 123.78 4889.07 128.05 4887.65 151.03 4963.70 79.44 2.566 62 125.10 4888.63 130.68 4886.77 157.22 4975.67 92.78 2.566 63 123.78 4889.07 129.36 4887.21 155.19 4974.01 90.56 2.566 64 122.47 4889.51 128.05 4887.65 154.59 4976.55 92.78 2.566 65 123.78 4889.07 129.36 4887.21 154.49 4971.90 88.33 2.566 66 119.84 4890.39 125.42 4888.53 150.55 4973.21 88.33 2.566 67 119.84 4890.39 125.42 4888.53 147.73 4964.77 79.44 2.566 68 122.47 4889.51 128.05 4887.65 152.48 4970.22 86.11 2.566 69 123.78 4889.07 129.36 4887.21 151.68 4963.46 79.44 2.566 70 118.52 4890.83 124.10 4888.97 149.22 4973.65 88.33 2.567 71 125.10 4888.63 130.68 4886.77 153.70 4965.13 81.67 2.567 72 122.47 4889.51 128.05 4887.65 151.07 4966.01 81.67 2.567 73 123.78 4889.07 129.36 4887.21 156.60 4978.23 95.00 2.567 74 121.15 4889.95 126.73 4888.09 151.16 4970.66 86.11 2.567 75 122.47 4889.51 128.05 4887.65 151.77 4968.12 83.89 2.567 76 123.78 4889.07 129.36 4887.21 153.78 4969.79 86.11 2.567 77 118.52 4890.83 124.10 4888.97 147.82 4969.43 83.89 2.567 78 119.84 4890.39 125.42 4888.53 151.95 4977.43 92.78 2.567 79 118.52 4890.83 124.10 4888.97 147.12 4967.32 81.67 2.567 80 121.15 4889.95 126.73 4888.09 149.05 4964.33 79.44 2.567 81 118.52 4890.83 124.10 4888.97 151.33 4979.98 95.00 2.567 82 119.84 4890.39 125.42 4888.53 151.25 4975.32 90.56 2.567 83 125.10 4888.63 129.36 4887.21 150.94 4959.04 75.00 2.567 84 125.10 4888.63 130.68 4886.77 153.00 4963.02 79.44 2.567 85 125.10 4888.63 130.68 4886.77 154.40 4967.24 83.89 2.567 86 125.10 4888.63 129.36 4887.21 151.64 4961.15 77.22 2.567 87 121.15 4889.95 126.73 4888.09 148.35 4962.22 77.22 2.567 88 125.10 4888.63 130.68 4886.77 155.11 4969.35 86.11 2.567 89 119.84 4890.39 125.42 4888.53 147.03 4962.66 77.22 2.567 90 122.47 4889.51 128.05 4887.65 149.66 4961.79 77.22 2.567 91 118.52 4890.83 124.10 4888.97 145.01 4960.99 75.00 2.567 92 119.84 4890.39 125.42 4888.53 149.84 4971.10 86.11 2.567 93 121.15 4889.95 126.73 4888.09 149.75 4966.44 81.67 2.567 94 125.10 4888.63 131.99 4886.33 158.57 4977.54 95.00 2.567 95 121.15 4889.95 128.05 4887.65 154.62 4978.86 95.00 2.567 96 121.15 4889.95 126.73 4888.09 150.46 4968.55 83.89 2.567 97 117.21 4891.27 124.10 4888.97 149.97 4978.06 92.78 2.567 98 123.78 4889.07 130.68 4886.77 157.25 4977.98 95.00 2.567 99 125.10 4888.63 130.68 4886.77 152.29 4960.91 77.22 2.567 Critical Failure Surface (circle 1) Intersects: XL: 121.15 YL: 4889.95 XR: 125.42 YR: 4888.53 Centre: XC: 153.32 YC: 4979.34 Radius: R: 95.00 Generated failure surface: (20 points) 121.15 4889.95 121.38 4889.87 121.60 4889.79 121.82 4889.71 122.04 4889.63 122.27 4889.56 122.49 4889.48 122.72 4889.40 122.94 4889.33 123.16 4889.25 123.39 4889.18 123.61 4889.10 123.84 4889.03 124.06 4888.95 124.29 4888.88 124.51 4888.81 4888.53 124.74 4888.74 124.96 4888.67 125.19 4888.60 125.42 Slice Geometry and Properties - Critical Failure Surface (circle 1, 38 slices) Slice X -S ----------------- Base X -Left Area Angle Width Length Matl Factor 1 121.15 0.00 19.8 0.11 0.12 2 121.26 0.00 19.8 0.11 0.12 3 121.38 0.00 19.5 0.11 0.12 4 121.49 0.00 19.5 0.11 0.12 5 121.60 0.00 19.3 0.11 0.12 6 121.71 0.00 19.5 0.11 0.12 7 121.82 0.00 19.3 0.11 0.12 8 121.93 0.00 19.3 0.11 0.12 9 122.04 0.00 19.1 0.11 0.12 10 122.16 0.00 19.3 0.11 0.12 11 122.27 0.00 19.0 0.11 0.12 12 122.38 0.00 19.0 0.11 0.12 13 122.49 0.00 18.8 0.11 0.12 14 122.60 0.00 19.0 0.11 0.12 15 122.72 0.00 18.6 0.11 0.12 16 122.83 0.00 18.8 0.11 0.12 17 122.94 0.00 18.8 0.11 0.12 18 123.05 0.00 18.5 0.11 0.12 19 123.16 0.00 18.5 0.11 0.12 20 123.28 0.00 18.3 0.11 0.12 21 123.39 0.00 18.3 0.11 0.12 22 123.50 0.00 18.3 0.11 0.12 23 123.61 0.00 18.3 0.11 0.12 24 123.72 0.00 18.1 0.11 0.12 PoreWater Normal Test Cohesion Phi Weight Force Stress 1 0.00 45.0 0.02 0.00 1 0.00 45.0 0.05 0.00 1 0.00 45.0 0.09 0.00 1 0.00 45.0 0.12 0.00 1 0.00 45.0 0.14 0.00 1 0.00 45.0 0.17 0.00 1 0.00 45.0 0.19 0.00 1 0.00 45.0 0.22 0.00 1 0.00 45.0 0.24 0.00 1 0.00 45.0 0.26 0.00 1 0.00 45.0 0.28 0.00 1 0.00 45.0 0.29 0.00 1 0.00 45.0 0.31 0.00 1 0.00 45.0 0.32 0.00 1 0.00 45.0 0.33 0.00 1 0.00 45.0 0.33 0.00 1 0.00 45.0 0.34 0.00 1 0.00 45.0 0.34 0.00 1 0.00 45.0 0.35 0.00 1 0.00 45.0 0.35 0.00 1 0.00 45.0 0.34 0.00 1 0.00 45.0 0.34 0.00 1 0.00 45.0 0.34 0.00 1 0.00 45.0 0.33 0.00 0.14 0.93 0.42 0.93 0.71 0.93 0.94 0.93 1.13 0.93 1.32 0.93 1.51 0.93 1.70 0.93 1.89 0.93 2.03 0.93 2.18 0.93 2.27 0.93 2.42 0.93 2.51 0.93 2.61 0.93 2.61 0.93 2.70 0.93 2.71 0.93 2.76 0.93 2.76 0.93 2.71 0.93 2.71 0.93 2.66 0.93 2.57 0.93 25 26 27 28 29 30 31 32 33 34 35 36 37 38 123.84 123.95 124.06 124.17 124.29 124.40 124.51 124.63 124.74 124.85 124.96 125.08 125.19 125.30 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 18.0 18.0 17.8 17.8 17.8 17.8 17.5 17.5 17.5 17.3 17.3 17.3 17.3 17.1 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.00 45.0 0.33 0.00 2.57 0.93 0.00 45.0 0.31 0.00 2.48 0.93 0.00 45.0 0.30 0.00 2.34 0.93 0.00 45.0 0.28 0.00 2.20 0.93 0.00 45.0 0.26 0.00 2.05 0.93 0.00 45.0 0.24 0.00 1.91 0.93 0.00 45.0 0.22 0.00 1.72 0.93 0.00 45.0 0.21 0.00 1.63 0.93 0.00 45.0 0.18 0.00 1.39 0.93 0.00 45.0 0.15 0.00 1.15 0.93 0.00 45.0 0.12 0.00 0.91 0.93 0.00 45.0 0.08 0.00 0.67 0.93 0.00 45.0 0.05 0.00 0.43 0.93 0.00 45.0 0.02 0.00 0.14 0.93 X -S Area: 0.08 Path Length: 4.49 X -S Weight: 8.82 ASPHALT 345 W. 62ND AVENUE DENVER, CO 80216 SPECIALTIES C O , OPERATING ACCOUNT CITYWIDE BANKS, A DIVISION OF HTLF BANK 82-595/1070 DENVER, CO 80202 DATE 05/22/24 ***Two thousand six hundred ninety-six and xx / 100 Dollars*** PAY Colorado Div Of Reclamation Mining & Safety TO THE 1313 Sherman St. #215 ORDER Denver CO 80203 F tY 2�Z - D '1 c3\ to 130332 CHECK NO. AMOUNT 130332 $2,696.00 AUTHORIZED SIGNATURE Division of Reclamation, Mining, and Safety Fee Receipt for M2O24O34 Asphalt Specialties Co., Inc. Daniel Hunt 345 W. 62nd Ave Denver CO 802160000 Receipt #: 47816 Date: 07/02/2024 Permit: M2024034 Payment Method Revenue Code Fee Description/Notes Amount Check #130332 4300-MAPP Minerals Application Fees $2,696.00 User: AHD Receipt Total: $2,696.00 Page 1 of 1 ORIGIN ID:APAA (303) 346-519t BEN LANGENFELD GREG LEWICKI ASSOCIATES 3375 W POWERS CIR LITTLETON, CO 80123 UNITED STATES US DRMS RECORDS 1313 SHERMAN ST RM 215 DENVER CO 80203 (303) 866-3667 nu: P0: SHIP DATE: 26JUN24 A(:TWGT: 4.55 LB CHD: 6571164/ROSA2530 BILL THIRD PARTY III IIIIIIIIIIIIiiiniIII I II 111111111111111111111 A;II11111'mei!! %lir REL# 3786346 THU - 27 JUN 5:00P 020117770 8496 8059 STANDARD OVERNIGHT 72 QBFA 80203 co —us DEN 4 DNR December 5, 2024 COLORADO Division of Reclamation, Mining and Safety Department of Natural Resources Daniel Hunt Asphalt Specialties Co., Inc. 345 W. 62nd Ave Denver, CO 80216 Re: Marcovich Mining Resource — File No. M-2024-034 Asphalt Specialties Co., Inc. 112c Construction Materials Reclamation Permit Issuance Dear Daniel Hunt: On December 5, 2024 the Division of Reclamation, Mining and Safety (Division) found Asphalt Specialties Co., Inc. to have satisfied the applicable requirements of the Colorado Mined Land Reclamation Act for the Extraction of Construction Materials, C.R.S. 34 32.5 101 et seq. for obtaining a mining and reclamation permit. Two signed originals of the permit have been executed. We have kept one copy for our files and are enclosing one copy for your use. It is your responsibility to comply with all of the terms of the permit. 1. All of the original application materials, as amended and supplemented, are an integral part of your permit and are incorporated into the permit by reference. We presume that you have a copy of all of these materials; therefore, none have been enclosed with this mailing. We suggest that you keep a copy of the permit and the permit application at the mining operation as a reference for operating personnel to help ensure compliance with the terms of the permit. 2. Changes in the mining and reclamation operations that differ from those described in the permit may require a modification to the permit. We suggest consulting the Construction Material Rules and Regulations and/or contacting us to determine if a revision to the permit is necessary. Rule 1.10 pertains to Amendments, Rule 1.9 to Technical Revisions, and Rule 1.11 to Conversions. 3. On your permit anniversary date each year, December 5, you must submit an annual fee and an annual report to the Division. The annual fee for this permit is $791.00. Please consult the Act, Rules and Regulations, and your permit for specific annual report requirements applicable to your mine. Annual reports, maps, and fees must be filed electronically using the Division's ePermitting portal. If you have not done so already, you will need to sign up for electronic filing of your annual report, map, and fee by visiting the Division's web site (https://drms.colorado.gov) clicking on ePermitting' on the `Information' page, and then clicking on the 'Sign up For Minerals Annual Report Electronic Filing' link. Physical Address: 1313 Sherman Street, Room 215, Denver, CO 30203 P 303.866.3567 F 303.832.8106 Mailing Address: DBMS Room 215, 1001 E 62nd Ave, -Denver, CO 80216 httos:,'rdrms.colorado.gy Jared S. Polls, Governor I Dan Gibbs, Executive Director I Michael A. Cunningham. Director i If you have any questions, please contact Nikie C. Gagnon by telephone at (720) 527-1640, or by email at Nikie.gagnon@state.co.us. Sincerely, Michael A. Cunningham Division Director Enclosure cc: Greg Geras, CF.CT.company_name Certified Mail No. : M -AP -07 4 DNR COLORADO Division of Reclamation, Mining and Safety Department of Natural Resources MINING AND RECLAMATION PERMIT CONSTRUCTION MATERIAL MINING OPERATIONS Permit Number: M-2024-034 Type of Permit: 112c Permit Date: December 5, 2024 (Anniversary date for annual report and fees purposes) THIS PERMIT is issued by the Mined Land Reclamation Board, Department of Natural Resources, State of Colorado. RECITALS A. The Permittee, Asphalt Specialties Co., Inc., desires to conduct a mining operation known as Marcovich Mining Resource, for the purpose of extracting Sand and gravel. Unless this permit is modified or a separate permit is issued to cover the mining and/or recovery of other minerals or extractive products, the Permittee will not mine or recover any other commodities at this site. B. On November 27, 2024 the Mined Land Reclamation Board (Board) approved the Permittee's application for this permit, fixed the amount of the financial warranty and directed that this permit be issued upon the filing with the Division of Reclamation, Mining and Safety (Division) of performance warranty and financial warranty (or warranties) in the amount so fixed in form and substance approved by the Division. Said warranties have been filed with the Division. C. If the Permittee desires to extract materials other than those listed in (A), a separate permit or a permit modification may be required. D. On November 27, 2024 the Board made the following findings: 1. The application for this permit complies with the requirements of the Colorado Mined Land Reclamation Act for the Extraction of Construction Materials, C.R.S. 34 32.5 101 et seq., as amended, and with all applicable local, state and federal laws; 2. The operation will not adversely affect the stability of any significant, valuable, and permanent man made structure located within two hundred feet of the Affected Land, except where there is an agreement between the Operator and the persons having an interest in the structure that damage to the structure is to be compensated for by the Permittee or if such an agreement cannot be reached, an engineering analysis establishes no damage will occur to the structure to the satisfaction of the Division; and; 3. The proposed mining and reclamation operations can be carried out in conformance with the requirements of the Act, and the Construction Material Rules and Regulations. [1] E. The Permittee has made a showing satisfactory to the Board that: 1. It will employ, during and after its underground mining and/or surface operations, procedures designed to minimize environmental disturbance from such operation; 2. It will provide for reclamation of the Affected Lands appropriate to the subsequent beneficial use of such lands; and 3. In the event of the failure of its proposed reclamation plan, it will take whatever measures may be necessary to assure the success of reclamation of the lands affected by such operations in accordance with the Act. F. A copy of the Permittee's application, as amended and supplemented, has been approved by the Board and is, by this reference, incorporated herein. G. The issuance of this permit does not relieve the Permittee from having to comply with all applicable Federal, State and County statutes, including State water law. GRANTS, CONDITIONS AND AGREEMENTS The Board, in reliance upon the representations and promises made in the permit application, as amended and supplemented, and the performance warranty, hereby issues a life of the mine permit to the Permittee, to engage in the operations described in the application on certain lands lying in the County of Weld, State of Colorado. These lands are described in the permit application, as amended and supplemented, and are referred to herein as the "Affected Lands". This permit is issued subject to the following conditions and agreements: 1) The Permittee will be bound by all applicable requirements of the Act, and all applicable rules and regulations of the Board, as amended from time to time, the terms of the permit application, the terms of the performance warranty, and the terms of the financial warranty filed with the Division. 2) The Permittee will file with the Division its annual report and fees on each anniversary date of this permit. 3) If analyses of the mining and reclamation operation and the data collected through monitoring and experimentation by the Permittee or monitoring by the Division indicate that the operation will not be able to comply with the requirements of the Act and applicable rules and regulations of the Board, the Permittee hereby agrees to exercise its best efforts, after consulting with the Division, to modify the plans to correct such deficiencies in the future. Such modifications may require technical revisions or amendments to the permit. 4) The Board or its authorized representative may enter upon the lands of the permitted operation at all reasonable times for the purpose of inspection to determine whether the provisions of the Act, Rules and Regulations, and permit have been complied with pursuant to C.R.S. 34-32.5-121. 5) This permit may be revoked or suspended for non-compliance with the Act or applicable rules or regulations promulgated by the Board, the permit, or by violation of a Board Order. 6) a) Pursuant to 34-32.5-118(5) of the Act, the Board has a right of entry to reclaim the lands affected by the operation or to respond to an emergency as defined by C.R.S. 34-32.5-121(2). [2] b) The Board will enter the lands to perform reclamation only if the Board has determined that: Reclamation required by the permit, statute, or regulations to be performed upon such lands has not been performed, or ii. Financial warranty forfeiture proceedings described in the Act or similar provisions of subsequent laws, if any, have been initiated. c) The Division, acting for the Board, will enter lands to respond to an emergency only where the Division determines that any of the conditions of Construction Materials Rule 8.4.2 exist. 7) The additional conditions set forth in the attached rider, if any, are incorporated herein by reference. a) Rider is attached. XX b) No rider is attached. MINED LAND RECLAMATION BOARD COLORADO DEPARTMENT OF NATURAL RESOURCES Michael A. Cunningham Division Director [3] Marcovich Mining Resource 112c Colorado Division of Reclamation, Mining, and Safety Construction Material Regular Operation Application Weld County USR Version May 2024 Revised November 2024 Asphalt Specialties Co., Inc. L Lewicki 8( Associates Table of Contents INTRODUCTION EXHIBIT A LEGAL DESCRIPTION EXHIBIT B INDEX MAP EXHIBIT C PREMINE AND MINE PLAN MAPS EXHIBIT D MINING PLAN EXHIBIT E RECLAMATION PLAN EXHIBIT F RECLAMATION MAPS EXHIBIT G WATER INFORMATION APPENDIX G-1 HYDROLOGY CALCULATIONS APPENDIX G-2 GROUNDWATER QUALITY MONITORING PLAN EXHIBIT H WILDLIFE INFORMATION EXHIBIT I SOILS INFORMATION APPENDIX I-1 SOIL REPORT EXHIBIT J VEGETATION INFORMATION APPENDIX J-1 WETLANDS REPORT EXHIBIT K CLIMATE INFORMATION EXHIBIT L RECLAMATION COSTS EXHIBIT M OTHER PERMITS REQUIRED EXHIBIT N RIGHT OF ENTRY EXHIBIT 0 OWNERS OF AFFECTED LAND AND MINERAL TO BE MINED EXHIBIT P MUNICIPALITIES WITHIN TWO MILES EXHIBIT Q PROOF OF MAILING OF NOTICES TO THE BOARD OF COUNTY COMMISSIONERS AND SOIL CONSERVATION DISTRICT EXHIBIT R PROOF OF FILING WITH COUNTY CLERK EXHIBIT S PERMANENT MAN-MADE STRUCTURES RULE 1.6.2(1)(B) RULE 6.5 GEOTECHNICAL STABILITY EXHIBIT Marcovich Gravel Pit November 2024 © Lewicki 8i Associates INTRODUCTION The proposed Marcovich Mining Resource is located just west of U.S. Highway 85 and southwest of the city limits of Fort Lupton in Weld County, CO. The property is bound by the South Platte River to the west. Asphalt Specialties Co., Inc. (Asphalt Specialties) is both the permittee and operator of the proposed aggregate mining operation. The site contains a group of agricultural fields, a residence, stock watering ponds, and agriculture related buildings. Mining access to the site will be via an easement across the agricultural parcel to the south and into the Asphalt Specialties Chavers Mining Resource (M-2015-030). Asphalt Specialties is proposing that the site be converted to a gravel pit to feed raw materials to their processing and sales point at the Chavers Mining Resource. The permit area of this operation will be 57.28 acres. The affected area from mining will be 44.2 acres. Reclamation will convert the site to water storage ponds surrounded by rangeland. A portion of the ponds may be refilled based on market conditions for inert fill disposal. The proposed operation at the Marcovich Mining Resource will consist of mining sand and gravel, then transporting material to the Chavers Mining Resource. Processing of the extracted materials at the Chavers Mining Resource will include crushing, screening, washing, and the use of concrete and asphalt plants. Marcovich Gravel Pit November 2024 i-1 © Lewicki & Associates EXHIBIT A LEGAL DESCRIPTION The site is located southwest of the City of Fort Lupton in Weld County, Colorado. The legal boundary is shown on Map C-1 which is included in Exhibit C. A general location map is shown in Exhibit B which indicates the mine entrance coordinates. The Marcovich Mining Resource is located southwest of Fort Lupton in Weld County, CO in part of the Northeast 1/4 of the Northwest 1/4 of Section 7, Township 1 North, Range 66 West, of the 6th Principal Meridian (PM). The legal description of mining portion of the permit area is as follows: Beginning at the Northwest Corner of the Northeastern Quarter of the Southwestern Quarter of Section 7 Township 1 North, Range 66 West of the 6th Principal Meridian; Thence, a x a distance of x feet to the point of beginning; Thence, N48° 50' 10.07"E a distance of 247.23 feet; Thence, N88° 51' 55.21"E a distance of 902.63 feet; Thence, N89° 33' 30.91"E a distance of 344.14 feet; Thence S03° 14' 49.41"W a distance of 1533.69 feet; Thence N89° 30' 23.42"W a distance of 220.05 feet; Thence S89° 38' 26.79"W a distance of 85.25 feet; Thence S89° 14' 25.14"W a distance of 1259.23 feet; Thence N00° 21' 25.96"W a distance of 1165.87 feet to the point of beginning. The mining portion of the permit area contains 54.65 acres more or less. Three temporary easements have been granted to the operation to cross the Sakata Farms Inc., Ogilvie, and Hunt Brothers Properties, Inc. properties. All easements are 40 feet wide. The Sakata easement is 1,160 feet long for a total of 1.07 acres. The Ogilvie easement is 1,100 feet long for a total of 1.01 acres. The Hunt Brothers Properties, Inc. easement is 600 feet long for a total of 0.55 acres. Therefore, the total permit acreage is 57.28 acres. The easement documentation is attached to this section. Marcovich Gravel Pit November 2024 A-1 © Lewicki & Associates EXHIBIT B INDEX MAP Marcovich Gravel Pit November 2024 B-1 © Lewicki & Associates EXHIBIT C PREMINE AND MINE PLAN MAPS Map C-1 Access Road Map C-2 Current Conditions Map C-3 Mining Plan Map C-4 Cross Sections (Weld County USR: See Item 09 for Maps) Marcovich Gravel Pit November 2024 C-1 © Lewicki & Associates EXHIBIT D MINING PLAN 1. General Mining Plan The property boundary has been surveyed. Map C-3 outlines the mining plan including the affected area of 44.2 -acre. Sand and gravel will be extracted for use in construction materials such as crushed rock, sand, washed rock, concrete, and asphalt. There is also the possibility of incidental fill dirt production. Access to the mine will be through a new road constructed between the current site and Chavers Mining Resource (M-2015-030). This road has been included in the legal description. The access road has been specifically designed to accommodate mine traffic, with all necessary earthwork for road improvement completed before mining begins. To prevent groundwater infiltration into the pit and facilitate water storage, a slurry wall will be installed around the mining area. Just outside the slurry wall boundary lies the affect area boundary. The affected area boundary avoids the active South Platte River channel and riparian buffer along the river except for inlet/outlet control structures. The affected area boundary will be signed to prevent disturbance outside that area. Dozers and scrapers will strip topsoil and overburden from mining areas, storing them in designated stockpiles. Any stockpile remaining for over 90 days will be seeded to prevent erosion. During pre -mine stripping, all existing buildings, except the manufactured home and garages, will be demolished, and debris will be entirely removed from the site. Sand and gravel extraction will involve loaders, excavators, dozers, and trucks, with material transported to Chavers Mining Resource for processing. Backfill materials may be hauled back to this site from the Chavers Mining Resource. While haul trucks are currently anticipated, there is potential for replacement by a conveyor belt in the future. The sand and gravel deposit, averaging 20-23 feet in thickness, will be mined progressively from north to south. Mining and reclamation will occur simultaneously to minimize overall disturbance. There is ample on -site topsoil and overburden for successful reclamation, transforming the site into water storage ponds surrounded by rangeland. The reclamation process will involve backfilling, regrading, topsoiling, and revegetation. Some or all of the water storage pond may be filled based on market demands for inert fill disposal. Mining will extend to the bottom of the gravel deposit, maintaining final mining slopes at 1.5H:1V along the perimeter. The active highwall will have a near -vertical slope, progressing halfway down the final mining slope to enable the dozer to knock down the remaining highwall, creating the completed mining slope. Slopes will then be backfilled with sand or overburden to achieve the reclaimed 3H:1V slopes, with specific slope details available on Map C-4 cross sections. Marcovich Gravel Pit November 2024 D-1 © Lewicki & Associates No blasting will occur at the Marcovich Mining Resource. If refuse, acid, or toxic materials are unexpectedly encountered, these materials will be removed from the site and disposed of appropriately. 2. Mining Timetable Mining operations at the Marcovich Mining Resource are expected to take approximately 7.3 years to complete, based on an annual average production of 700,000 tons. Actual production rates will fluctuate based on market conditions. An approximate mining timetable based on this production and the phased mining plan is shown in Table D-1. Table D-1 Mining Timetable Description Construction of access road and slurry wall. Time Required 2 months Initial stripping of Northern Phase. 1 month Mine and reclaim Northern Phase according to approved plans. Reclamation occurs as mining has reached its maximum extents in an area. 3 years Initial stripping of Southern Phase. 1 month Mine and reclaim Southern Phase according to approved plans. Reclamation occurs as mining has reached its maximum extents in an area. 3 years Total 7.3 years 3. Mine Facilities and Operation The site will contain the following facilities and equipment: Facilities: - Portable toilet - Mine office (portable) - Portable fuel storage Equipment: - Front-end loaders - Bulldozers - Scrapers - Haul trucks (off highway) - Water trucks - Graders - Excavators - Conveyors Marcovich Gravel Pit November 2024 D-2 © Lewicki & Associates Asphalt Specialties will provide portable toilets and bottled water to employees on site during operations. Any fuel stored on site will have full secondary containment that can carry 110% of the fuel tank volume. All facilities will be removed during reclamation. 4. Topsoil and Overburden Handling Topsoil averages 0.5-1.5 feet, averaging 1 foot, overlying 2.5 feet of overburden. Topsoil and overburden will be stripped with appropriate earthmoving equipment as deemed suitable for the operation such as front-end loaders, dozers, excavators, and water trucks. Topsoil and overburden will be stockpiled separately onsite in either designated stockpiles, berms, or directly placed to create final reclamation slopes. The very first portion of stripping will be hauled from Marcovich to Chavers. After that stripped materials will be directly placed into reclamation or stockpiled in designated areas. These materials will be directly placed in the designated stockpile areas or berms which can be seen on Map C-3. Stockpiles to be in place longer than 90 days will be seeded with the permanent seed mix to prevent erosion (see Exhibit E for seed mix). An average of one feet of topsoil and 2.5 feet of overburden were assumed to determine the overall material balance shown in Table D-2. Table D-2 Topsoil and Overburden Material Generated During Mining Stripping Area (ac) Material Generated (CY) Topsoil 32.1 51,870 Overburden 32.1 129,680 Due to the reclaimed land use as water storage ponds, there will be an excess of topsoil than what is needed for reclamation. This is because the pond makes up the majority of the reclaimed land and does not need to be topsoiled entirely. There is not enough overburden to meet reclamation needs by itself, however, with excess topsoil and potential sand, there is more than enough material on site for reclamation. Excess topsoil and overburden will be used to achieve the final grading shown in the reclamation map in Exhibit F. Overburden, topsoil, and sand will be used to backfill mining slopes to their final reclaimed state. Topsoil will be replaced on all disturbances outside of the ponds and on the pond slopes. It will not be replaced on the pond floor. Topsoil will be replaced in an average two -foot layer to restore the existing soil conditions. Details pertaining to reclamation can be found in Exhibit E and the maps in Exhibit F. 5. Site Access The Marcovich Mining Resource will be accessed via three easements to cross agricultural land to the active Chavers Mining Resource. A 40 -foot wide easement has been granted to the operator. A two lane graveled road will be constructed. This road will remain in place after mining is completed. Easements are shown on map C-1. Marcovich Gravel Pit November 2024 D-3 © Lewicki & Associates 6. Water Information, Rights, and Augmentation All water right issues such as availability of water for this operation, consumption rates, dust control, etc. are presented in Exhibit G — Water Information. 7. Schedule of Operations Mining operations will occur as dictated by demand with an average annual production of 700,000 tons. Mining, screening, and processing will be conducted on site with portable equipment throughout the year. The operator will not have night gravel mining operations, although minor truck activity and repairs may occur after hours. 8. Weld County Impacts and Environmental Impacts All potential county impacts and concerns are addressed in the Weld County Use by Special Review. Marcovich Gravel Pit November 2024 D-4 © Lewicki & Associates EXHIBIT E RECLAMATION PLAN 1. General Reclamation Plan The total affected area to be reclaimed under this permit is 44.2 acres out of the 57.28 -acre permit area. Reclamation of the Marcovich Mining Resource will convert the site to a final land use of a water storage pond surrounded by rangeland. Reclamation will occur concurrently with mining. Final reclamation will be completed after mining has finished. The pre -mine land use is predominantly agriculture with one residence. Surroundings land uses include agriculture, open space, and mining. Pursuant to Rule 6.4.5.2(b), the applicant evaluated the post -mine land use in regard to adopted state and local land use plans for this area and adjacent land uses. The proposed post -mine land use of water storage ponds and rangeland is compatible with the general agricultural character of the area. Table E-1 below summarizes the anticipated final land uses within the affected area upon completion of reclamation. The distribution of rangeland and water storage pond may vary based on the market demand for inert backfill storage. Table E-1 Reclamation Areas Description Area (Acres) Rangeland 12.1 Water Storage Pond 26.7 Access Roads/Easements 2.63 Disturbed Area Total 41.4 Undisturbed Area 15.8 Total Affected Area 57.28 Reclamation will occur concurrently as mining progresses. No more than 1,000 feet of highwall will be unreclaimed at a time. Mining slopes will be backfilled and graded to a maximum 3H:1V slope. The slopes will then be compacted for stabilization and to prevent erosion. All portable facilities and equipment will be removed from the area. All berms will be flattened. The slurry wall will remain during and after reclamation. The pond slopes and any other surrounding disturbances will be topsoiled and seeded for revegetation. Topsoil will be replaced in a two -foot layer to restore the current soil profile. Revegetation will be completed using a native seed mix recommended by the Natural Resource Conservation Service. Revegetation efforts will be monitored following reclamation. The pit will be used for freshwater storage after it has been fully reclaimed and revegetated. There will be more than enough material stockpiled from on -site materials to fulfill reclamation needs as the groundwater lake takes up the majority of the reclamation area. Table E-2 shows the volumes of topsoil and overburden required for reclamation and the material volumes that will be stripped and stockpiled. As shown, there is an excess of topsoil that is stripped versus what is required for reclamation. The stripped overburden does not meet the amount required for backfilling the pits. However, there will be an excess of topsoil and sand that will be more Marcovich Gravel Pit November 2024 E-1 © Lewicki & Associates than enough to meet these requirements. These calculations were made assuming that the site has a uniform one foot of topsoil and 2.5 feet of overburden across all areas. Sand volumes were not calculated as detailed information on their location and thickness were not obtained. No sand volume is assumed for the reclamation volume balance calculations, however, sand is very likely to be encountered. Any sand encountered will either be sold or used to augment the overburden for backfill. Topsoil will be replaced in an average two -foot layer across all non -pond disturbances, while overburden and other excess material will be used to backfill the pit slopes from 1.5H:1V to 3H:1V. Table E-2 Reclamation Volumes Material Available on Site Requirements for Reclamation Reclamation Area Mining Area & Surroundings Area (acres) 32.2 Topsoil Stripped (CY) 51,870 Overburden Stripped (CY) 129,680 Topsoil Required (CY) 30,300 Overburden Backfill Required (CY) 109,278 Excess material will be used for backfilling slopes. Sand that may be encountered will be used for backfilling or will be sold. Asphalt Specialties will keep the minimum amount of material (topsoil, overburden, and potentially sand) required for reclamation throughout the entire mine life. Based on market demand, a portion or all of the area within the slurry wall may be backfilled. If the site is completely or partially backfilled the amount of area reclaimed as dry rangeland will increase. The operator will ensure that material is clean and uncontaminated. They will utilize the same forms as the Chavers Resource because the Chavers resource will act as the processing and sales point for the Marcovich site. 2. Alternative Reclamation Plan The site may alternatively be reclaimed to entirely rangeland following a Technical Revision. The pit will be backfilled entirely with excess material from both on and off site. Material will be graded and compacted prior to topsoiling, ripping, and seeding for revegetation. All other components of reclamation will remain the same as the primary reclamation plan, except for the removal of the water storage use. Pit walls will be backfilled to 3H:1V after mining is completed in an area. See Map F-3 for details on the alternative reclamation plan. The approximate volumes needed for reclamation are as follows. It is assumed that all pit walls have been backfilled to 3H:1V prior to the total backfilling of the pit. The volume to backfill the walls to their final reclaimed slopes is shown in Table E-2. Marcovich Gravel Pit November 2024 E-2 © Lewicki & Associates Table E-3 Reclamation Area Mining Area & Surroundin s Area (acres) 32.2 Material Available on Site Topsoil Stripped (CY) 51,870 Overburden Stripped (CY) 129,680 Requirements for Reclamation Topsoil Required (CY) 51,870 Pit Backfill Required (CY) 1,194,650 3. Topsoil Replacement An average of one foot of topsoil will be stripped and stockpiled prior to mining. After backfilling and grading has been completed during reclamation, topsoil will be replaced at 0.5 to 1.5 feet, at an average depth of one foot in a manner that is similar to the pre -mine soil profile. Topsoil will only be placed on the pond slopes and other surrounding disturbances. Topsoil will not be replaced on the pond floors. Replaced topsoil will be directly placed by loaders and haul trucks. All topsoiled areas will be disced to aid in root penetration. 4. Haul Roads and Access All internal haul roads will remain following reclamation to support the future land use. 5. Reclamation Timetable and Sequence The sequence and timing of reclamation can be seen in Table E-4 below. The reclamation schedule is dependent on the rate of mining and fluctuating market demands. The operator will reclaim the site concurrently with the progression of mining to limit the total disturbance. Table E-4 Reclamation Timetable Description Develop and mine Northern Phase Time Required 3 years Develop and mine Southern Phase 3 years Backfill, topsoil, and revegetate remaining disturbances 1 year Vegetation monitoring 2 years Total 9 years Marcovich Gravel Pit November 2024 E-3 © Lewicki & Associates 6. Revegetation Plans Seed will be placed in all areas to be vegetated following grading, topsoiling, and discing of the soil. All disturbances that are retopsoiled will be seeded with a Rangeland Seed Mix. The Weld County recommended mix to be used is as follows: 6.1. Rangeland Seed Mix Species Sand Bluestein Sand Lovegrass Indian Ricegrass Prairie Sandreed Green Needlegrass Little Bluestein Yellow Indiangrass Switchgrass Sand Dropseed Total Pounds of pure live seed per acre (drilled) 1.0 2.5 3.0 0.75 1.5 0.75 0.5 1.5 0.5 12.0 Broadcast seeding will be done at double the drill rate. Mulch will be placed at roughly 4000 pounds per acre. 7. Post Reclamation Site Drainage The site will drain internally following reclamation. All water that enters the site will drain to the water storage pond in the center of the site. Refer to map G-1 for the post reclamation drainage of the site. 8. Revegetation Success Criteria Revegetation will be deemed adequate when erosion is controlled, the vegetation cover matches neighboring wildlife habitat areas, and when it is considered satisfactory according to Division standards. This will be monitored for a minimum of two years following the completion of reclamation. 9. Monitoring Reclamation Success Measures will be employed for the control of any noxious weed species. The objective of this weed management plan is to control undesirable plants on the Marcovich property. Plants identified through the Colorado Noxious Weed Act (C.R.S 35-5.5) and the Weld County Noxious Weed List as undesirable and designated for management within the county will be removed. Marcovich Gravel Pit November 2024 E-4 © Lewicki & Associates Any weeds identified as List A species will be eradicated. Other lower listed plants identified as noxious weeds will be managed by control measures. A Weed Control Plan will be utilized as follows: 1) Each April, a weed survey will be taken of the permit area. 2) If any patches or plants have been identified, they will be sprayed by backpack sprayer or 4 -wheeler using chemicals approved for use by the weed control staff of Weld County. 3) After reclamation, weed surveys and spraying will continue until the perennial cover and production of the site have met DRMS requirements and bond release has been obtained. The Division and Weld County staff will be consulted regarding any weed infestation areas and any control measures prior to their initiation. The plan does not contemplate total weed removal on the property. Rather, the goal is to prevent the spread of weeds into uninfected areas as is the primary goal of the Weld County Weed Management Plan. Each year during the mining operation, the permit area will be monitored closely, through which the operator may determine if any additional weeds have grown. If any new species of weeds are found, Weld County and the Division will be consulted in order to formulate the best plan for the new infestation. 9.1. Weed List Weeds listed in Table E-1 will be eradicated or suppressed according to Weld County requirements. Table E-1. Weld County Weed List Eradication Suppression List A (in Weld County) Cypress Spurge Myrtle Spurge Haire Willow -Herb Purple Loosestrife Japanese Yellow Flag Iris List B (in Weld County) Absinth Wormwood Eurasian Watermilfoil Black Henbane Jointed Goatgrass Bull Thistle Musk Thistle Chamomile species Russian knapweed Chinese Clematis Scotch Thistle Houndstongue Yellow Nutsedge Moth Mullein Bouncingbet Marcovich Gravel Pit November 2024 E-5 © Lewicki & Associates Eradication Oxeye Daisy Suppression Common Tansy Plumeless thistle Dalmation Toadflax Spotted knapweed Dames Rocket Sulfur Cinquefoil Diffuse Knapweed Tamarisk Hoary Cress Wild Caraway Leafy Spurge Yellow Toadflax Perrenial Pepperweed Canada Thistle Russian Olive Common & Cutleaf Thistle List C (in Weld County) Common Mullein Field Bindweed Cheatgrass/Downy Brome Puncturevine/Goatheads Marcovich Gravel Pit November 2024 E-6 © Lewicki & Associates EXHIBIT F RECLAMATION MAPS Map F-1 Reclamation Plan Map F-2 Flow Structures Map F-3 Reclamation Alternative (Weld County USR: See Item 09 for Maps) Marcovich Gravel Pit November 2024 F-1 © Lewicki & Associates EXHIBIT G WATER INFORMATION 1. General The Marcovich Mining Resource is within the floodplain and floodway of the South Platte River. The pond onsite is a remanent of a gravel pit that operated from 1960's until being captured by the river in the late 1970's. Central Colorado Water Conservancy District (CCWCD) installed augmentation wells east of Highway 85 that discharged into a ditch, flowed underneath the highway and into the pond in question. In 2009, CCWCD was ordered to cease and desist from pumping those wells. The ditch has remained abandoned since those orders. Billy Mihelich, PE, the district engineer authorized the ditch be removed by the mining. The mine's intent is to utilize the pond as a discharge point for dewatering activities to prevent potential for erosion at the discharge point. Sampling will occur prior to water entering the pond. Mining within the floodway will be conducted with no filling or stockpiling above the natural ground grade. Groundwater is located roughly five feet below the natural grade. All groundwater onsite is part of the South Platte River alluvial aquifer. Prior to mining, a slurry wall will be installed around the perimeter, as shown on Map C-3. These slurry walls will be for the development of water storage reservoirs following reclamation. Asphalt Specialties is committed to protecting the hydrological balance and water quality at the site. 2. Water Quality Protection The primary concerns surrounding water quality protection at the Marcovich Mining Resource site are the potential impacts to the surface and groundwater from sediment, hydraulic fluids, and diesel fuel. Sediment will be controlled through the use of stormwater retention within the disturbance area through the life of the mine. The site will be graded in a manner that maintains all surficial flows within the disturbed area, in turn containing all sediment and unwanted discharges from leaving the site. Hydraulic fluids and diesel fuels will be contained within vehicles that follow best practices of maintenance; these practices include regular inspections of vehicles, hydraulic lines, and any other potential spill sources. Diesel fuel or other oils will not be stored on -site. Any surface water discharges from the site will be sampled in accordance with the NPDES discharge permit. All discharge will be via the approved Outfall, the proposed location of which is shown on Map C-3. A dewatering sump will be utilized within the pit. The mine's intent is to utilize the pond as a discharge point for dewatering activities to prevent potential for erosion at the discharge point. Sampling will occur prior to water entering the pond. Marcovich Gravel Pit November 2024 G-1 © Lewicki & Associates Table G-1. Surface Water Discharge Monitoring Requirements in NPDES Discharge Permit Parameter Flow Monitoring Frequency Instantaneous, Monthly Sample Type In -situ pH 2x/month Grab Total Suspended Solids 2x/month Grab Oil and Grease Visual 2x/month Visual Oil and Grease Contingent on visibility of oil and grease Grab Total Flow Instantaneous, Monthly Calculated Selenium, Potentially Dissolved 2x/month Grab Total Dissolved Solids Quarterly Grab Note: these are the anticipated analytes based on operator experience at similar sites. CDPHE may issue different sampling requirements with the permit. 3. Floodplain The majority of the site is within the 100 -year floodplain and floodway as reported by the Federal Emergency Management Agency. These boundaries are shown in the Exhibit C and F maps. The minimum distance maintained from the South Platte River to excavation activities is 100 feet. Additionally, no stockpiling or filling above the natural grade will occur in the floodway. Overall, the downstream flood impacts should remain the same or be reduced from activity at the site as the removal of material results in more storage space for flood water below the existing grade. A no -rise certification has been provided to Weld County as part of its floodplain development permit. In accordance with the Mile High Flood Control District technical guidelines, inflow/outflow structures will be installed along the riverbank where mining reaches its closest point to the South Platte River. Details of these designs can be seen on Map G-1. In the event of flooding at the site, equipment from the active mining floor will be removed and the pit will be allowed to fill with water. The flooded pit will be pumped only after the flood has subsided. All fuel will be stored at least one foot above the base flood elevation and in sufficient secondary containment with 110% carrying capacity. 4. Wetlands The National Wetlands Inventory aerial -based mapping indicates the presence of wetlands within the permit area. They are however limited to a concrete lined ditch and a settling pond at the end of the ditch. An onsite inventory of potential wetlands will be undertaken before disturbing these areas. Exhibit C and F maps show the NWI mapped wetlands. Marcovich Gravel Pit November 2024 G-2 © Lewicki & Associates 5. Aquifers The only identified aquifer located at the site is the shallow alluvial aquifer of the South Platte River. The depth to this aquifer varies throughout the year but is typically five feet below surface. According to the U.S. Geological Survey's Ground Water Atlas of the United States', the underlying bedrock aquifer is the Laramie Fox Hills Aquifer of the Denver Basin system. The entirety of the Marcovich Mining Resource mining operation will take place in the overlaying alluvium above a shale/siltstone layer; the Laramie Fox Hills Aquifer will not be mined. 6. Surface Water The mining operation will impact surface water in the area through the stormwater runoff that enters the site. Map G-1 shows the drainage patterns and how they are affected throughout the life of the mine. The maps include information on the drainage basins currently, during mining, and post reclamation as well as the drainage directions throughout these stages. The primary concern for surface water protection at the site is preventing the discharge of sediment, oil, and/or hydraulic fluids from the operation areas. Oils and hydraulic fluids are stored on site following the standard best management practices. These practices include the use of secondary containment at fluid storage and transfer points, spill kits, and employee training regarding safe handling practices. Sediment is trapped onsite using controls and best management practices by directing and controlling surface water runoff that enters the disturbed areas. More information on sediment and surface water control is provided below. 6.1. Surface Water Handling One drainage basin collects all stormwater runoff on and around the Marcovich site. This is shown on the Drainage Map. Currently, the area has a series of dams to provide stock watering ponds. Those ponds will be removed prior to mining. 6.1.1. Mining During all phases of mining, surface water runoff will drain to the active pit or reclaimed reservoir. Water collected in the active mining pod will be allowed to evaporate or will be discharge via the approved CDPHE outfall once sediment has settled out. 6.1.2. Post Reclamation The drainage patterns during mining will be retained following reclamation of the site. Any surface water runoff will collect in the reclaimed reservoir. There is enough storage capacity above the anticipated reservoir level and the top of the shore to store the 100 -year storm events. More on those calculations are provided in section 6.2 below. ' https://pubs.usgs.gov/ha/ha730/ch_c/ Marcovich Gravel Pit November 2024 G-3 © Lewicki & Associates 6.1.3. Flood Protection Mining will extend to within 200 feet from the South Platte River as shown on the Drainage Map. Due to this proximity to the river, measures will be taken to protect the riverbank from erosion during a flood event. An inflow and outflow structure will be constructed between the River and the mining pod once mining is within 300 feet of the river. These structures will allow for the safe exchange of flood waters between the pit and river which prevents erosion of the riverbank and pitside slope during flood events. These structures are of a design approved for use by the Mile High Flood District. Details of the inflow/outflow structure are shown on Map F-2. 6.2. Disturbed Area Runoff During all stages of mining, there is enough water storage capacity to contain the 5 -year and 100 -year 24 -hour storm events and prevent erosion from surface water discharge. The expected rainfall from these events at the Marcovich Site is provided in Table G-2 below. Table G-2. Area Storm Events (from NOAA2) Event Probability Event Rainfall (inches) 5-YR 24 -HR 100-YR 24 -HR 2.29 4.64 The peak runoff was generated from these values for the three drainage basins during all stages of mining. Pre -mine, mining, and reclamation conditions are delineated on the Drainage Map. The discharge volumes from these storm events are calculated in Appendix G-1 at the end of this exhibit. Table G-3 summarizes the runoff volumes and storage volumes for each drainage. All drainage calculations were made using the Rational Method identified in the Mile High Flood Control District. Drainage Basin 1 Site Condition Base Table G-3. Drainage Calculations Area (ac) Curve Number 44.0 70 100-Yr 24 -Hr Discharge Runoff (ac -ft) Flow Rate (gpm)* 6.55 0 Detention Capacity (ac -ft)*** N/A Mine 44.0 82 10.3 1000-3000** 820 Reclamation 44.0 89 12.8 0 81.6 * The discharge flow rate is calculated from the peak discharge of the 100-Yr 24 -Hr storm event. **Discharge flow rate is variable and controlled during mining as all discharges are pumped from the pit ***Detention Capacity calculated in CAD as the surface volume above the pit floor (approx. 25 feet @ 32 acres) or water storage pond (approx. 3 feet @ 27 acres). 'National Oceanic and Atmospheric Administration Marcovich Gravel Pit November 2024 G-4 © Lewicki & Associates 7. Groundwater Groundwater is located approximately five feet below the surface at the Marcovich site. This was determined from wells installed onsite. Table G-4 outlines all wells within 600' of the permit area. These well locations are also shown on Map C-2. Groundwater quality data was gathered in advance of mining. This data and discussion of it can be seen in the Groundwater Monitoring Plan in Appendix G-2. Table G-4. Wells Within 600' of Permit Area Total Depth Distance from nearest mining Applicant/Well ID Permit ID (feet) Purpose area (ft) ELIZABETH A WETHINGTON & CO 197906 30 Domestic Stock 600 WETHINGTON, ELIZABETH A 19458 -F -R 34 Irrigation <100 but spotted from quarters EHELNS, WM H 936-WCB 48 Irrigation <100 but spotted from quarters ASPHALT SPECIALTIES CO., INC. 4000003- 29 Monitoring 0 (HUNT, DAN) MH LELL, J 124421 34 Domestic 0 CENTRAL COLO W CONSER DIST 20005-F 41 Other 375 *Lell, J and Asphalt Specialties wells on the property are under the applicant's control. 7.1. Groundwater — Mining Prior to mining, a slurry wall will be installed around the perimeter of the pit to prevent groundwater flow into the mining area. Following slurry wall installation, the operator will mine out the pod by dewatering it via the approved CDPHE discharge point. Pumping to conduct this dewatering will take place during the initial mining and then pumping will cease. Stormwater runoff that is collected may be pumped out to protect local water rights, once sediment has settled. For this reason, the CDPHE discharge point will be maintained over the life of the mine. The pump will be located at least two feet below the active mining floor at the lowest point of the pit. It will be surrounded by a gravel filter. This configuration minimizes the risk of sediment being pumped out of the pit. The typical pit pump location can be seen on Map C-2. 7.2. Groundwater — Reclamation A permanent water storage reservoir will be left behind, as can be seen on Map F-1. There will be no groundwater consumptive use in reclamation. 7.3. Groundwater — Slurry Wall Impact The installation of a slurry wall within the alluvial aquifer of the South Platte River may create two potential impacts to the aquifer: the creation of local groundwater shadows or mounding that damage neighboring structures or property and the potential exacerbation of regional groundwater impacts. For these reasons, the applicant will submit a groundwater model prior to Marcovich Gravel Pit November 2024 G-5 © Lewicki & Associates installation of the slurry wall. If the determined by modelling, a French drain system will be installed to mitigate modelled impacts. 8. Water Related Permits The operator is applying for all necessary permits that have not already been acquired for water handling at the Marcovich Mining Resource. This includes a discharge permit with the Colorado Department of Public Health and Environment and a gravel well permit for initial dewatering of each pod with the Colorado Division of Water Resources. 9. Water Consumption and Source Water for dust control will be the primary consumptive use at the Marcovich Mining Resource site. Water will be purchased from a local source during operations for consumptive uses. No ongoing water consumptive use exists in reclamation, since the water storage pod is lined. This water will be sourced from a freshwater pond in the processing area. This pond will be covered by a gravel well permit. Table G-7 summarizes the estimated water consumption for the operation throughout the year. Marcovich Gravel Pit November 2024 G-6 © Lewicki & Associates Table G-5. Water Consumption Month Jan Dust Control (ac -ft) 0.11 Evaporative Depletions (ac -ft) 0.00 Water Removed from Mining (ac -ft) 0.00 Total (ac -ft) 0.1 Feb 0.12 0.00 0.00 0.1 Mar 0.19 0.00 0.00 0.2 Apr 0.32 0.00 0.00 0.3 May 0.42 0.00 0.00 0.4 Jun 0.51 0.00 0.00 0.5 Jul 0.53 0.00 0.00 0.5 Aug 0.47 0.00 0.00 0.5 Sep 0.35 0.00 0.00 0.4 Oct 0.25 0.00 0.00 0.3 Nov 0.14 0.00 0.00 0.1 Dec 0.11 0.00 0.00 0.1 Total 3.50 0.00 0.00 3.5 The Marcovich Mining Resource sources water for operations via water contract. Any groundwater exposure will be covered by a gravel well permit with the Colorado Division of Water Resources. Marcovich Gravel Pit November 2024 G-7 © Lewicki & Associates Appendix G-1 Hydrology Calculations Marcovich Gravel Pit November 2024 G-8 © Lewicki & Associates 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Wednesday, 10 / 2 / 2024 Hyd. No. 1 Baseline Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 5 yrs = 2 min = 44.440 ac = 0.0 = TR55 = 2.29 in = 24 hrs Peak discharge = 3.265 cfs Time to peak = 824 min Hyd. volume = 57,751 cuft Curve number = 70* Hydraulic length = 0 ft Time of conc. (Tc) = 146.80 min Distribution = Type II Shape factor = 484 Composite (Area/CN) = [(0.940 x 100) + (2.800 x 30) + (11.600 x 49) + (5.000 x 89) + (21.900 x 80) + (2.200 x 86)] / 44.440 Q (cfs) 4.00 _ 3.00 2.00 1.00 0.00 Baseline Hyd. No. 1 -- 5 Year w 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 1680 Hyd No. 1 Q (cfs) 4.00 3.00 2.00 1.00 Time (min) 2 TR55 Tc Worksheet Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. 1 Baseline Description Sheet Flow Manning's n -value Flow length (ft) Two-year 24 -hr precip. (in) Land slope (%) Travel Time (min) Shallow Concentrated Flow Flow length (ft) Watercourse slope (%) Surface description Average velocity (ft/s) Travel Time (min) Channel Flow X sectional flow area (sqft) Wetted perimeter (ft) Channel slope (%) Manning's n -value Velocity (ft/s) A B C = 0.011 0.011 0.011 = 0.0 0.0 0.0 = 0.00 0.00 0.00 = 0.00 0.00 0.00 Totals = 0.00 + 0.00 + 0.00 = 0.00 = 1333.00 = 0.01 = Unpaved =0.15 0.00 0.00 Unpaved 0.00 0.00 0.00 Paved 0.00 = 146.79 + 0.00 + 0.00 = 146.79 = 0.00 = 0.00 = 0.00 = 0.015 =0.00 0.00 0.00 0.00 0.015 0.00 0.00 0.00 0.00 0.015 0.00 Flow length (ft) ({0})0.0 0.0 0.0 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Total Travel Time, Tc 146.80 min 3 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Wednesday, 10 / 2 / 2024 Hyd. No. 2 Mining Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 5 yrs = 2 min = 44.440 ac = 0.0 = TR55 = 2.29 in = 24 hrs Peak discharge = 30.68 cfs Time to peak = 734 min Hyd. volume = 138,306 cuft Curve number = 82* Hydraulic length = 0 ft Time of conc. (Tc) = 32.30 min Distribution = Type II Shape factor = 484 Composite (Area/CN) = [(30.000 x 89) + (0.940 x 100) + (6.100 x 49) + (7.400 x 80)] / 44.440 Q (cfs) 35.00 _ 30.00 25.00 20.00 15.00 10.00 5.00 Mining Hyd. No. 2 -- 5 Year 0.00 - _ 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 2 Q (cfs) 35.00 30.00 25.00 20.00 15.00 10.00 5.00 Time (min) 4 TR55 Tc Worksheet Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. 2 Mining Description Sheet Flow Manning's n -value Flow length (ft) Two-year 24 -hr precip. (in) Land slope CD/o) Travel Time (min) Shallow Concentrated Flow Flow length (ft) Watercourse slope (%) Surface description Average velocity (ft/s) Travel Time (min) Channel Flow X sectional flow area (sqft) Wetted perimeter (ft) Channel slope (%) Manning's n -value Velocity (ft/s) A B C = 0.011 0.011 0.011 = 0.0 0.0 0.0 = 0.00 0.00 0.00 = 0.00 0.00 0.00 Totals = 0.00 + 0.00 + 0.00 = 0.00 = 295.00 = 0.01 = Unpaved =0.15 0.00 0.00 Paved 0.00 0.00 0.00 Paved 0.00 = 32.30 + 0.00 + 0.00 = 32.30 = 0.00 0.00 0.00 = 0.00 0.00 0.00 = 0.00 0.00 0.00 = 0.015 0.015 0.015 =0.00 0.00 0.00 Flow length (ft) ({0})0.0 0.0 0.0 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Total Travel Time, Tc 32.30 min 5 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Wednesday, 10 / 2 / 2024 Hyd. No. 3 Reclamation Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 5 yrs = 2 min = 44.360 ac = 0.0 = TR55 = 2.29 in = 24 hrs Peak discharge = 47.95 cfs Time to peak = 732 min Hyd. volume = 207,510 cuft Curve number = 89* Hydraulic length = 0 ft Time of conc. (Tc) = 32.30 min Distribution = Type II Shape factor = 484 Composite (Area/CN) = [(28.300 x 100) + (2.600 x 80) + (6.100 x 49) + (7.360 x 80)] / 44.360 Q (cfs) 50.00 _ 40.00 30.00 20.00 10.00 0.00 Reclamation Hyd. No. 3 -- 5 Year \\N , 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 3 Q (cfs) 50.00 40.00 30.00 20.00 10.00 Time (min) 6 TR55 Tc Worksheet Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. 3 Reclamation Description Sheet Flow Manning's n -value Flow length (ft) Two-year 24 -hr precip. (in) Land slope CD/o) Travel Time (min) Shallow Concentrated Flow Flow length (ft) Watercourse slope (%) Surface description Average velocity (ft/s) Travel Time (min) Channel Flow X sectional flow area (sqft) Wetted perimeter (ft) Channel slope (%) Manning's n -value Velocity (ft/s) A B C = 0.011 0.011 0.011 = 0.0 0.0 0.0 = 0.00 0.00 0.00 = 0.00 0.00 0.00 Totals = 0.00 + 0.00 + 0.00 = 0.00 = 295.00 = 0.01 = Unpaved =0.15 0.00 0.00 Paved 0.00 0.00 0.00 Paved 0.00 = 32.30 + 0.00 + 0.00 = 32.30 = 0.00 0.00 0.00 = 0.00 0.00 0.00 = 0.00 0.00 0.00 = 0.015 0.015 0.015 =0.00 0.00 0.00 Flow length (ft) ({0})0.0 0.0 0.0 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Total Travel Time, Tc 32.30 min 7 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. 4 Reclamation - Alternative Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 5 yrs = 2 min = 44.370 ac = 0.0 = TR55 = 2.29 in = 24 hrs Peak discharge Time to peak Hyd. volume Curve number Hydraulic length Time of conc. (Tc) Distribution Shape factor Wednesday, 10 / 2 / 2024 = 2.891 cfs = 828 min = 52,836 cuft = 69* = 0 ft = 146.10 min = Type II = 484 Composite (Area/CN) = [(0.940 x 100) + (2.790 x 30) + (11.560 x 49) + (29.080 x 80)] / 44.370 Q (cfs) 3.00 _ 2.00 1.00 0.00 Reclamation - Alternative Hyd. No. 4 -- 5 Year 0 120 240 Hyd No. 4 360 480 600 I 0.00 720 840 960 1080 1200 1320 1440 1560 1680 Q (cfs) 3.00 2.00 1.00 Time (min) 8 TR55 Tc Worksheet Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. 4 Reclamation - Alternative Description Sheet Flow Manning's n -value Flow length (ft) Two-year 24 -hr precip. (in) Land slope (%) Travel Time (min) Shallow Concentrated Flow Flow length (ft) Watercourse slope (%) Surface description Average velocity (ft/s) Travel Time (min) Channel Flow X sectional flow area (sqft) Wetted perimeter (ft) Channel slope (%) Manning's n -value Velocity (ft/s) A B C = 0.011 0.011 0.011 = 0.0 0.0 0.0 = 0.00 0.00 0.00 = 0.00 0.00 0.00 Totals = 0.00 + 0.00 + 0.00 = 0.00 = 1333.00 = 0.01 = Unpaved =0.15 0.00 0.00 Paved 0.00 0.00 0.00 Paved 0.00 = 146.12 + 0.00 + 0.00 = 146.12 = 0.00 = 0.00 = 0.00 = 0.015 =0.00 0.00 0.00 0.00 0.015 0.00 0.00 0.00 0.00 0.015 0.00 Flow length (ft) ({0})0.0 0.0 0.0 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Total Travel Time, Tc 146.10 min 9 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Wednesday, 10 / 2 / 2024 Hyd. No. 1 Baseline Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 100 yrs = 2 min = 44.440 ac = 0.0 = TR55 = 4.64 in = 24 hrs Peak discharge = 21.27 cfs Time to peak = 804 min Hyd. volume = 285,291 cuft Curve number = 70* Hydraulic length = 0 ft Time of conc. (Tc) = 146.80 min Distribution = Type II Shape factor = 484 Composite (Area/CN) = [(0.940 x 100) + (2.800 x 30) + (11.600 x 49) + (5.000 x 89) + (21.900 x 80) + (2.200 x 86)] / 44.440 Q (cfs) 24.00 _ 20.00 16.00 12.00 8.00 4.00 Baseline Hyd. No. 1 -- 100 Year 0.00 _ J 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 1680 Hyd No. 1 Q (cfs) 24.00 20.00 16.00 12.00 8.00 4.00 Time (min) 10 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Wednesday, 10 / 2 / 2024 Hyd. No. 2 Mining Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 100 yrs = 2 min = 44.440 ac = 0.0 = TR55 = 4.64 in = 24 hrs Peak discharge = 104.32 cfs Time to peak = 732 min Hyd. volume = 450,673 cuft Curve number = 82* Hydraulic length = 0 ft Time of conc. (Tc) = 32.30 min Distribution = Type II Shape factor = 484 Composite (Area/CN) = [(30.000 x 89) + (0.940 x 100) + (6.100 x 49) + (7.400 x 80)] / 44.440 Q (cfs) 120.00 _ 100.00 80.00 60.00 40.00 20.00 0.00 Mining Hyd. No. 2 -- 100 Year 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 2 Q (cfs) 120.00 100.00 80.00 60.00 40.00 20.00 Time (min) 11 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Wednesday, 10 / 2 / 2024 Hyd. No. 3 Reclamation Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 100 yrs = 2 min = 44.360 ac = 0.0 = TR55 = 4.64 in = 24 hrs Peak discharge = 127.66 cfs Time to peak = 732 min Hyd. volume = 558,939 cuft Curve number = 89* Hydraulic length = 0 ft Time of conc. (Tc) = 32.30 min Distribution = Type II Shape factor = 484 Composite (Area/CN) = [(28.300 x 100) + (2.600 x 80) + (6.100 x 49) + (7.360 x 80)] / 44.360 Q (cfs) 140.00 _ 120.00 100.00 80.00 60.00 40.00 20.00 Reclamation Hyd. No. 3 -- 100 Year 0.00 - _ 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 3 Q (cfs) 140.00 120.00 100.00 80.00 60.00 40.00 20.00 Time (min) 12 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. 4 Reclamation - Alternative Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 100 yrs = 2 min = 44.370 ac = 0.0 = TR55 = 4.64 in = 24 hrs Peak discharge Time to peak Hyd. volume Curve number Hydraulic length Time of conc. (Tc) Distribution Shape factor Wednesday, 10 / 2 / 2024 = 20.16 cfs = 804 min = 273,035 cuft = 69* = 0 ft = 146.10 min = Type II = 484 Composite (Area/CN) = [(0.940 x 100) + (2.790 x 30) + (11.560 x 49) + (29.080 x 80)] / 44.370 Q (cfs) 21.00 _ 18.00 15.00 12.00 9.00 6.00 3.00 Reclamation - Alternative Hyd. No. 4 -- 100 Year 0.00 0 120 240 Hyd No. 4 360 480 600 1 0.00 720 840 960 1080 1200 1320 1440 1560 1680 Q (cfs) 21.00 18.00 15.00 12.00 9.00 6.00 3.00 Time (min) Appendix G-2 Groundwater Quality Monitoring Plan Marcovich Gravel Pit November 2024 © Lewicki & Associates GROUNDWATER MONITORING PLAN FOR MARCOVICH MINING RESOURCE DRMS PERMIT NO. M-2024-034 4125 US HIGHWAY 85 WELD COUNTY, COLORADO Prepared by: ASPHALT SPECIALTIES CO., INC 345 W. 62ND AVE. DENVER, COLORADO 80216 303-289-8555 • Fax 303-289-7707 ASPHALT SPECIALTIES CO. November 2024 Marcovich Mining Resource Groundwater Monitoring Plan November 2024 Page ii TABLE OF CONTENTS Section Page 1.0 INTRODUCTION 1 1.1 SITE DESCRIPTION 1 1.2 MONITORING WELL NETWORK 1 2.0 BASELINE GROUNDWATER CHARACTERIZATION 2 2.1 BASELINE GROUNDWATER QUANTITY 2 2.1.1 Groundwater Fluctuation 2 2.1.2 Groundwater Flow Direction 3 2.1.3 Groundwater High and Low Elevations 3 2.2 BASELINE GROUNDWATER QUALITY 4 2.2.1 Groundwater Quality Benchmarks 4 2.2.2 Baseline Groundwater Quality Sampling Results 4 3.0 PREDICTED IMPACTS TO HYDROLOGIC BALANCE 5 4.0 GROUNDWATER MONITORING PLAN 5 4.1 GROUNDWATER QUANTITY 5 4.1.1 Groundwater Measurement Schedule 5 4.1.2 Groundwater Quantity Data Evaluation and Trigger Levels 6 4.1.3 Reporting 6 4.2 GROUNDWATER QUALITY 6 4.2.1 Groundwater Sampling Schedule 6 4.2.2 Groundwater Sample Collection Procedures 6 4.2.3 Laboratory Analysis of Groundwater Samples 7 4.2.4 Groundwater Point of Compliance Well 7 4.2.5 Groundwater Quality Data Evaluation and Trigger Levels 7 4.2.6 Reporting 7 LIST OF FIGURES FIGURE 1 SITE LOCATION MAP FIGURE 2 MONITORING WELL NETWORK MAP FIGURE 3 SEPTEMBER 2024 GROUNDWATER POTENTIOMTRIC MAP FIGURE 4 AVERAGE BASELINE GROUNDWATER POTENTIOMETRIC MAP FIGURE 5 BASELINE GROUNDWATER WELL ELEVATIONS Marcovich Mining Resource Groundwater Monitoring Plan November 2024 Page iii LIST OF TABLES TABLE 1 BASELINE GROUNDWATER ELEVATIONS (TO -DATE) TABLE 2 WQCC REGULATION 41 INTERIM NARRATIVE STANDARDS (INS) TABLES 1 - 4 TABLE 3 BASELINE GROUNDWATER QUALITY RESULTS (TO -DATE) LIST OF APPENDICES APPENDIX A MONITORING WELL CONSTRUCTION LOGS LIST OF ACRONYMS ASCI Asphalt Specialties Co., Inc. CDSS Colorado's Decision Support System DRMS Division of Reclamation, Mining, and Safety DWR Division of Water Resources ft amsl feet above mean sea level ft bgs feet below ground surface gpd/ft gallons per day per foot HSA hollow stem auger POC Point of Compliance INS Interim Narrative Standards QA/QC quality assurance/quality control TDS total dissolved solids TR Technical Revision WQCC Water Quality Control Commission Marcovich Mining Resource Groundwater Monitoring Plan November 2024 Page 1 1.0 INTRODUCTION Asphalt Specialties Co., Inc. (ASCI) has prepared this Groundwater Monitoring Plan (GWMP) for the Marcovich Mining Resource (Site) located at 4125 US Highway 85 in Weld County, Colorado (Figure 1) in general accordance with the requirements set forth in the Construction Materials Rule No. 3, Section 3.1.7 and the Division of Reclamation, Mining, and Safety (DRMS) Groundwater Monitoring: Sampling and Analysis Plan Guidance. Construction Materials and Hard Rock Sites (July 2024). Prior to mining, a slurry wall will be installed to hydraulically disconnect the mining operation from groundwater in the surrounding alluvial aquifer. This GWMP summarizes data available to -date from the initial six (6) consecutive quarters of baseline groundwater characterization conducted and details the future monitoring activities that will occur throughout the operational life of the mine. Note: Baseline characterization data will continue to be collected for a minimum of two (2) additional quarters (i.e., 4th Quarter 2024, and 1st Quarter 2025 for a total of eight [8] quarters of data) until the start of activities which impact groundwater at the Site occur (i.e., installation of the slurry wall). The final groundwater characterization data sets used to document the pre -operational baseline conditions will be submitted as a Technical Revision (TR) to DRMS in a Baseline Data Summary Report. 1.1 SITE DESCRIPTION The Site is former agricultural land that is relatively flat with a topographic slope of 0.0021 ft/ft. Mining activities at the Site will occur within the unconfined alluvial aquifer of the South Platte River. The average thickness of the overburden is approximately three (3) to four (4) feet below ground surface (ft bgs). Beneath the overburden are low terrace alluvial deposits of the South Platte River. The deposits vary from silty sands and gravel in the upper zones to sandy gravels nearer the bedrock. The sand and gravel deposits slightly vary in thickness but are approximately 28 to 30 feet across the Site. Underlying the sand and gravel deposit is the Denver Formation which is a consolidated bedrock stratum composed primarily of generally impermeable shale and claystone approximately 550 — 600 feet thick. Surrounding land uses in the area include agricultural, other sand and gravel mines, oil and gas industry sites, and rangelands. The total affected area is 44.3 acres. Sand and gravel mining operations are anticipated to begin in 2025. Groundwater in the alluvial aquifer at the Site is approximately 5 ft bgs and generally flows northwest to north-northwest towards the South Platte River. Per the Division of Water Resources (DWR) Colorado's Decision Support System (CDSS) website, the alluvial aquifer has rapid permeability with a transmissivity of approximately 120,000 gallons per day per foot (gpd/ft) and specific yield of 0.2. The estimated coefficient of storage is 1.5x10-5 to 3.1x10-5. The Site is located within the City of Fort Lupton Wellfield as classified by the Water Quality Control Commission (WQCC) Regulation 42. 1.2 MONITORING WELL NETWORK Four (4) monitoring wells (MW -1 through MW -4) have been installed in accordance with DWR standards within the unconsolidated alluvium at the Site to characterize baseline groundwater Marcovich Mining Resource Groundwater Monitoring Plan November 2024 Page 2 conditions. After installation of the slurry wall, monitoring well MW -3 will be located hydraulically up -gradient at the Site and monitoring wells MW -1 and MW -4 will be located cross - gradient. Monitoring well MW -2, which is currently located inside the proposed slurry wall, will be abandoned and replaced by monitoring well MW -2R prior to installation of the slurry wall. As a result, monitoring well MW -2R will be located hydraulically down -gradient once mining operations commence. Borings were installed utilizing 4-1/4" ID hollow stem auger (HSA) drilling method from ground surface to the top of underlying bedrock. Monitoring wells are constructed of two (2) -inch diameter Schedule 40 PVC with factory slotted 0.010" slot size for the screened portions. The filter packs consist of 10/20 silica sand and a bentonite seal (chips) was installed from the top of the filter pack to ground surface. At the surface, concrete pads were installed along with a four (4) - inch square steel well covering with hinged locking cap to protect the above ground riser. However, existing monitoring well MW -2 is currently located inside the proposed slurry wall and will be abandoned and replaced by monitoring well MW -2R prior to installing the slurry wall. The location of monitoring wells is shown in Figure 2. Monitoring well construction logs are provided in Appendix A. 2.0 BASELINE GROUNDWATER CHARACTERIZATION This GWMP summarizes available data collected to -date from June 2023 through September 2024 to characterize baseline groundwater conditions. Data collected includes monthly groundwater elevations (for groundwater quantity) and quarterly groundwater sampling event results (for groundwater quality). As ASCI is still conducting baseline groundwater characterization, the final data sets used to document the pre -operational baseline conditions will be submitted in the final Baseline Data Summary Report to DRMS. 2.1 BASELINE GROUNDWATER QUANTITY Groundwater elevations collected from monitoring wells at the Site are presented in Table 1. The general groundwater flow direction across the Site is northwest to north-northwest towards the South Platte River as shown on the potentiometric maps presented in Figures 3 and 4. A graph depicting the fluctuation in groundwater elevations during the baseline monitoring period to -date is presented in Figure 5. 2.1.1 Groundwater Fluctuation Groundwater elevations naturally fluctuate throughout the year based on the season but can also be influenced by a variety of unusual conditions at any one time (e.g., persistent rain or drought). Evaluation of groundwater elevation data collected from June 2023 to September 2024 at the Site (a 16 -month period) indicates an average fluctuation of 2.45 ft at the Site (i.e., a change of 2.04 ft in MW -1 and 2.85 ft in MW -2). However, the elevated groundwater elevations collected in June and July of 2023 are due to the historic precipitation that occurred during the spring and early - summer of 2023. When evaluating groundwater elevations between August 2023 to September 2024 (a 14 -month period), the average fluctuation between groundwater high and low elevations Marcovich Mining Resource Groundwater Monitoring Plan November 2024 Page 3 at the Site is only 0.92 ft (i.e., a change of 1.04 ft in MW -1 and 0.80 ft in MW -2). While the elevated water levels in June and July of 2023 are useful in documenting the pre -operational groundwater high levels at the Site, as discussed in Section 2.1.3, the groundwater elevation data available from August 2023 to September 2024 indicates that the groundwater fluctuation across the Site remained relatively stable with an approximate change of only one (1) -foot during this period. 2.1.2 Groundwater Flow Direction Given the known hydraulic properties of the homogenous alluvial aquifer at the Site (e.g., an unconfined aquifer, uniform stratigraphy, consistent flow transmissivity as mapped by DWR, etc.) and since groundwater only fluctuated approximately one (1) -foot at the Site between August 2023 to September 2024, the site -specific groundwater elevation data collected from MW -1 can be correlated to MW -3 (both wells are located approx. 1,450 feet + 100 ft east of the South Platte River) and the site -specific groundwater elevation data collected from MW -2 can be correlated to MW -4 (both wells are located approx. 375 feet + 50 ft east of the South Platte River). By applying the difference in the September 2024 groundwater elevation vs. the average groundwater elevation for MW -1 (i.e., 0.19 feet) to MW -3 and for MW -2 (i.e., -0.18 feet) to MW -4, an estimate of the average groundwater elevations for MW -3 and MW -4 during the baseline period can be obtained. The following table presents the September 2024 and Average Baseline Groundwater Elevations for each monitoring well used to determine groundwater flow direction at the Site. Monitoring Well September 2024 Groundwater Elevation Average Baseline Groundwater Elevation MW -1 4901.47 4901.28 MW -2 4899.33 4899.51 MW -3 4903.29 4903.10* MW -4 4901.78 4901.96* Notes: Elevations in ft amsl * = Estimated value Potentiometric maps for September 2024 and the Average Baseline Groundwater Elevations are presented in Figures 3 and 4, respectively. As shown, groundwater generally flows northwest to north-northwest across the Site towards the South Platte River. While seasonal fluctuations may slightly alter groundwater flow direction, groundwater elevations do not change substantially enough to alter the general flow of groundwater in a direction other than towards the South Platte River as would be expected in an unconfined alluvial aquifer adjacent to a river. 2.1.3 Groundwater High and Low Elevations As discussed in Section 2.1.2, given the known hydraulic properties of the alluvial aquifer and locations of the monitoring wells in relation to the South Platte River, the groundwater high and low elevations for MW -1 and MW -2 between June 2023 to September 2024 can also be correlated Marcovich Mining Resource Groundwater Monitoring Plan November 2024 Page 4 to estimate the groundwater high and low elevations for MW -3 and MW -4. By applying the difference in the September 2024 groundwater elevations against the groundwater high and low elevations for MW -1 (1.28 ft and -0.76 ft, respectively) to MW -3 and for MW -2 (2.55 ft and -0.30 ft, respectively) to MW -4, the following table indicates the pre -operational groundwater high and low elevations for each well during the baseline period to -date. However, as ASCI is still conducting baseline groundwater characterization, the final groundwater elevations used to document the pre -operational baseline conditions will be submitted in the final Baseline Data Summary Report to DRMS. Monitoring Well Pre -operational Groundwater High Elevation Pre -operational Groundwater Low Elevation MW -1 4902.75 4900.71 MW -2 4901.88 4899.03 MW -3 4904.57* 4902.53* MW -4 4904.33* 4901.48* Notes: Elevations in ft amsl * = Estimated value 2.2 BASELINE GROUNDWATER QUALITY 2.2.1 Groundwater Quality Benchmarks The objective of the baseline groundwater period is to document the background groundwater quality for applicable analytes and establish the groundwater quality benchmarks for the Site. Per WQCC Regulation No. 42 Site -specific Water Quality Classifications and Standards for Groundwater, the Site is located within the specified area of the City of Fort Lupton Wellfield. The groundwater classifications in this area are Domestic Use -Quality and Agricultural Use - Quality. The groundwater quality standards assigned to confined and unconfined groundwater in the City of Fort Lupton Wellfield is WQCC Regulation 41 Interim Narrative Standards (INS) Tables 1 — 4 (5 CCR 1002-41) which are the same standards utilized by the DRMS. Per Rule 3.1.7(2)(c)(ii) and through correspondence with DRMS, the lowest WQCC Regulation 41 INS Tables 1 — 4 standards for applicable analytes are utilized as the default numeric protection value benchmarks (Table 2), except for analytes where baseline groundwater concentrations exceed these values. For these analytes, the highest concentration reported during the baseline groundwater sampling period will be used as a site -specific groundwater quality benchmark. Site - specific groundwater quality benchmarks will be used for comparison against future groundwater sampling event results to demonstrate protection of existing and reasonably potential future uses of groundwater throughout the operational life of the mine until reclamation has been achieved (i.e., when release of reclamation liability occurs). 2.2.2 Baseline Groundwater Quality Sampling Results Results of the first six (6) quarters of baseline groundwater sampling events used to determine the groundwater quality benchmarks for the Site are presented in Table 3. Results were compared Marcovich Mining Resource Groundwater Monitoring Plan November 2024 Page 5 against their lowest WQCC Regulation 41 INS Tables 1— 4 standards. As shown in Table 3, results for six (6) analytes during the baseline monitoring period to -date have exceeded their lowest WQCC Regulation 41 INS Tables 1 — 4 standards (Chloride, Manganese, Nitrate [NO3], Total Nitrate -Nitrite [NO2+NO3], Sulfate, and Uranium). Therefore, the highest concentration reported for these analytes during the baseline groundwater monitoring period will be used as the site - specific groundwater quality benchmark. Results for all other analytes are below their respective WQCC Regulation 41 INS Tables 1 — 4 standards. However, as ASCI is still conducting baseline groundwater characterization, the final groundwater quality benchmarks used to document the pre- operational baseline conditions will be submitted in the final Baseline Data Summary Report to DRMS. 3.0 PREDICTED IMPACTS TO HYDROLOGIC BALANCE To predict the extent of impacts to the hydrologic balance, groundwater modeling was conducted (see Appendix G-3 of the DRMS Permit Application). The predicted impacts to the hydrologic balance are localized areas of groundwater mounding occurring to the south and east of the slurry wall and groundwater shadowing occurring to the north and west of the slurry wall in the alluvial aquifer. The maximum groundwater mounding predicted by the model is +1.39 feet occurring 100 feet south of the slurry wall. The maximum groundwater shadowing predicted by the modeling is -0.96 feet occurring 100 feet north of the slurry wall. These predicted impacts to the hydrologic balance are within the general range of seasonal fluctuation at the Site and are not anticipated to have an adverse effect to the surrounding area. Since no other slurry walls are near the Site, this slurry wall will not prohibit groundwater from reaching the South Platte River. As the slurry wall will hydraulically separate the mining operation from the surrounding alluvial aquifer, no impacts to groundwater quality are anticipated. 4.0 GROUNDWATER MONITORING PLAN The following activities will be conducted to monitor groundwater quantity and quality throughout the operational life of the mine until reclamation is complete. The final groundwater characterization data sets used to document the pre -operational baseline conditions will be submitted as a Technical Revision (TR) to DRMS in a Baseline Data Summary Report. 4.1 GROUNDWATER QUANTITY 4.1.1 Groundwater Measurement Schedule ASCI will continue to collect and evaluate monthly groundwater elevation readings from Site monitoring wells prior to the start of activities which impact groundwater at the Site (i.e., installation of the slurry wall) and for a minimum of 12 months after installation of the slurry wall is complete and mining operations have commenced to monitor for adverse impacts to the hydrologic balance. Any change to the groundwater level monitoring schedule (i.e., reduction in measurement frequency) will be submitted to DRMS via TR for approval prior to implementation. Marcovich Mining Resource Groundwater Monitoring Plan November 2024 Page 6 4.1.2 Groundwater Quantity Data Evaluation and Trigger Levels The primary trigger for evaluating if impacts to the hydrologic balance occur will be if the groundwater level in any well either increases or decreases two (2) feet above or below the final baseline data set measurements. The current trigger measurements for each well are provided in the following table. However, as ASCI is still conducting baseline groundwater characterization, the final groundwater trigger elevations will be submitted in the final Baseline Data Summary Report to DRMS. Well ID Baseline GW Elevation — High Trigger Elevation for Evaluating High GW Impacts Baseline GW Elevation — Low Trigger Elevation for Evaluating Low GW Impacts MW -1 4902.75 4904.75 4900.71 4898.71 MW -2 4901.88 4903.88 4899.03 4897.03 MW -3 4904.57* 4906.57* 4902.53* 4900.53* MW -4 4904.33* 4906.33* 4901.48* 4899.48* Notes: Elevations in ft amsl * = Estimated value 4.1.3 Reporting Groundwater levels collected will be compared against the final baseline data set. Unless groundwater evaluation trigger levels are exceeded, ASCI will report groundwater level data to DRMS as supplemental information with the annual report for the Site each year. Should high or low groundwater evaluation trigger levels be exceeded, ASCI will contact DRMS upon discovery to discuss the path forward. Subsequent actions may potentially include continued/increased monitoring frequency, conduct a groundwater mounding/shadowing evaluation, etc. 4.2 GROUNDWATER QUALITY 4.2.1 Groundwater Sampling Schedule ASCI will continue to conduct quarterly groundwater sampling events at the Site for a minimum of four (4) consecutive quarters after mining operations have commenced. For each sampling event, groundwater samples will be collected from Site monitoring wells and submitted for laboratory analysis. A duplicate quality assurance/quality control (QA/QC) sample will be collected from one of the monitoring wells per event. Additional QA/QC samples (e.g., method blanks, laboratory control samples, matrix spikes, etc.) will be analyzed by the laboratory during batch analyses with results provided in the final laboratory reports. Any change to the groundwater quality monitoring schedule (i.e., reduction in sampling frequency) will be submitted to DRMS via TR for approval prior to implementation. 4.2.2 Groundwater Sample Collection Procedures Prior to sampling each well, depth to groundwater and total well depth measurements will be collected using a water level indicator to the nearest 0.01 foot. Groundwater will then be purged Marcovich Mining Resource Groundwater Monitoring Plan November 2024 Page 7 from the well utilizing a submersible pump with dedicated tubing or hand -bailed with a dedicated bailer. All non -dedicated equipment used to collect groundwater samples will be decontaminated with a detergent (e.g., Alconox® Detergent Powder) and distilled water solution prior to use at each monitoring well. Purged water will be collected in five (5) gallon buckets where water quality parameter readings for temperature, pH, specific conductivity, and total dissolved solids (TDS) will be collected. The total purge volume from the well will be recorded. Once groundwater stabilization is achieved (i.e., three consecutive readings within ten percent for each stabilization parameter) and/or a minimum of three (3) well volumes are removed, groundwater will be collected directly into laboratory -supplied containers with the preservative appropriate for the analysis requested, as applicable. Samples will be labeled, placed in a cooler with ice (cooled to 4°C), and stored until delivery to the laboratory accompanied by chain -of -custody documentation. 4.2.3 Laboratory Analysis of Groundwater Samples Groundwater samples submitted to the laboratory will be analyzed for applicable WQCC Regulation 41 INS Tables 1 — 4 analytes. The following analytical methods (or comparable methods) will be utilized by the laboratory to report water quality results. ■ Metals (Dissolved) by EPA Method 200.7 and 200.8 ■ Inorganic Anions by EPA Method 300.0 + Calculation ■ Chromium by Standard Method (SM) 3500-Cr B + Calculation ■ pH by SM 4500 -H -B ■ TDS by SM 2540-C Any change to the current analyte list for laboratory analysis (e.g., reduction of analytes) will be submitted to DRMS via Technical Revision for approval prior to implementation. 4.2.4 Groundwater Point of Compliance Well Down -gradient well MW -2R, which will be installed prior to installation of the slurry wall, will serve as the designated "Points of Compliance" (POC) well in accordance with Rule 3.1.7(6)(b)(ii)(A). 4.2.5 Groundwater Quality Data Evaluation and Trigger Levels ASCI will compare laboratory results against the final groundwater quality benchmarks developed for the Site to determine if any exceedance(s) have occurred. The primary trigger for evaluating if potentially adverse impacts to groundwater have occurred will be if results for any analytes exceed the baseline groundwater quality benchmarks for the Site in POC monitoring well MW -2R. 4.2.6 Reporting Unless exceedance(s) above baseline groundwater quality benchmarks for the Site occur in POC well MW -2R, ASCI will report groundwater quality monitoring results to DRMS as supplemental information with the annual report for the Site each year. If analyte exceedance(s) of site -specific groundwater quality benchmarks are reported in monitoring wells MW -1, MW -3, and/or MW -4, Marcovich Mining Resource Groundwater Monitoring Plan November 2024 Page 8 this would indicate the impact to groundwater quality is potentially from an off -site source. Should analyte exceedance(s) occur in these wells only, ASCI will monitor results from subsequent groundwater sampling events to determine if elevated concentration(s) of the analyte(s) persist. If exceedance(s) of baseline groundwater quality benchmarks are detected in down -gradient POC well MW -2R, ASCI will contact DRMS upon discovery to discuss the path forward and potential mitigation measures, if appropriate. Potential mitigation measures may include: ■ Conduct confirmation sampling of well(s) for the exceeding parameter(s). ■ Evaluate the existing data set to determine if any trends are present. ■ Increase groundwater sampling event frequency to determine if impacts are anomalous and/or temporary, as applicable. Install additional wells, as necessary, if exceedances persist. ■ If exceedances persist, conduct a statistical trend analysis to determine: 1) if exceedances are statistically significant increases over background; and/or 2) if a new site -specific groundwater quality benchmark is appropriate (to be submitted to DRMS as a Technical Revision). ASCI will work with DRMS to address impacts identified in POC wells and implement mitigation measures, as appropriate, based upon the situation encountered at that time. FIGURES -��= I'{F*+_'• •y� •': V f5 }.r L ' '.•t •1F} ._ ••F • ; ' 5 fry r �a T r r mo' 5 yy T� . ,• f r tx .. _ ,. �Y. 1 1 1 F. } ., --5 —t I.1.:_ ell 1 i( r . '. .i f+fitY�3 J 4- . y •y� 44. + ' may.}, T f •V l ��n�a • �. I s • r— 4flr we b J • i + , h� P #6* '1 m0.. J4'' r. ' y{ I .'� • a D. � Wells ,S y 1� { I I — , -• 4' r. ISM. -,�¢-, • i . 4 . y a fff ' x • y ' ' y I .I �5 # I ,• • L ' t;1Lt` r + -' f i. j c a a I . �•, .i,� 4VTr iii ll44 . * 6 ..} h i • ,, r Legend DRMS SCALE (approx.) 0 w ---:- Permit Boundary 1,225 ft 2,450 ft i I N E S FIGURE 1 - SITE LOCATION MAP 4125 US HIGHWAY 85 WELD COUNTY, CO 80621 MARCOVICH MINING RESOURCE GROUNDWATER MONITORING AND MITIGATION PLAN ASPHALT SPECIALTIES CO., INC. DATE: 9/24/2024 :uIa1 7E DRMS Permit Boundary 0 POC Monitoring Well Slurry Wall (Approx.) • Up/Cross-gradient Monitoring Well • Monitoring Well To Be Removed FIGURE 2 MONITORING WELL NETWORK MAP MARCOVICH MINING RESOURCE GROUNDWATER MONITORING PLAN ASPHALT SPECIALTIES CO., INC. DATE: 11/2/2024 49021 Groundwater Potentiomeitrc Contour Line (ft amsl) �► Flow Direction Arrow 4901.47 GW Elevation (ft ar Scale: 0 300 600 feet I FIGURE 3 SEPTEMBER 2024 GROUNDWATER POTENTIOMETRIC MAP MARCOVICH MINING RESOURCE GROUNDWATER MONITORING PLAN ASPHALT SPECIALTIES CO., INC. DATE: 9/20/2024 DRMS Permit Boundary • Monitoring Well 49021 Groundwater Potentiomeitrc Contour Line (ft amsl) �► Flow Direction Arrow 4901.28 GW Elevation (ft amsl) Scale: 0 315 630 feet I FIGURE 4 AVERAGE BASELINE GROUNDWATER POTENTIOMETRIC MAP MARCOVICH MINING RESOURCE GROUNDWATER MONITORING PLAN ASPHALT SPECIALTIES CO., INC. DATE: 9/20/2024 Figure 5 - Marcovich Mining Resource Baseline Groundwater Well Elevations June 2023 - September 2024 t MW -1 B MW -2 t MW -3 B MW -4 4904 ■ GROUNDWATER ELEVATION (ft amsl) 4903 ♦, 4902 4901 4900 4899 4898 • Elevated Readings in June and 4897 July 2023 N N (.1 N N N N N N N N N I I I I I I I I I D) Q U cs O> U Ca) L Q U) O Z O u- 2 Q `� TIME N 7 N N N N Q (A TABLES Marcovich Mining Resource Groundwater Monitoring Plan Baseline Groundwater Elevations (To -Date) June 2023 to September 2024 Table 1 Well Consturction Information MW -1 MW -2 MW -3 MW -4 Latitude / Longitude 40.063479° /-104.819044° 40.065363° /-104.821855° 40.061470° /-104.820161° 40.062438° /-104.823413° TOC (ft amsl) 4909.34 4907.55 4910.47 4910.6 Ground (ft amsl) 4906.5 4904.4 4907.6 4907.7 Screen (Top) 4.38 4.64 5.16 4.96 Screen (Bottom) 29.38 34.64 25.16 24.96 Screen (Length) 25 30 20 20 Total Depth from TOC 32.22 37.79 28.03 27.86 Total Depth (ft bgs) 29.38 34.64 25.16 24.96 Month & Year MW -1 MW -2 MW -3 MW -4 SWL TOC (ft) SWL (ft bgs) GW Elev. (ft amsl) SWL TOC (ft) SWL (ft bgs) GW Elev. (ft amsl) SWL TOC (ft) SWL (ft bgs) GW Elev. (ft amsl) SWL TOC (ft) SWL (ft bgs) GW Elev. (ft amsl) Baseline Collection Period To -Date : August 2023 to September 2024 June 2023* 6.59 3.75 4902.75 5.67 2.52 4901.88 Well Not Installed Well Not Installed July2023* 7.00 4.16 4902.34 7.09 3.94 4900.46 Well Not Installed Well Not Installed August 2023 7.60 4.76 4901.74 7.79 4.64 4899.76 Well Not Installed Well Not Installed September 2023 7.98 5.14 4901.36 7.95 4.80 4899.60 Well Not Installed Well Not Installed October 2023 7.64 4.80 4901.70 7.74 4.59 4899.81 Well Not Installed Well Not Installed November 2023 7.96 5.12 4901.38 8.08 4.93 4899.47 Well Not Installed Well Not Installed December 2023 8.23 5.39 4901.11 8.27 5.12 4899.28 Well Not Installed Well Not Installed January 2024 8.62 5.78 4900.72 8.52 5.37 4899.03 Well Not Installed Well Not Installed February 2024 8.63 5.79 4900.71 8.46 5.31 4899.09 Well Not Installed Well Not Installed March 2024 8.35 5.51 4900.99 7.87 4.72 4899.68 Well Not Installed Well Not Installed April 2024 8.62 5.78 4900.72 8.33 5.18 4899.22 Well Not Installed Well Not Installed May 2024 7.98 5.14 4901.36 7.72 4.57 4899.83 Well Not Installed Well Not Installed June 2024 8.17 5.33 4901.17 7.90 4.75 4899.65 Well Not Installed Well Not Installed July 2024 7.59 4.75 4901.75 7.73 4.58 4899.82 Well Not Installed Well Not Installed August 2024 7.60 4.76 4901.74 7.97 4.82 4899.58 Well Not Installed Well Not Installed September 2024 7.87 5.03 4901.47 8.22 5.07 4899.33 7.18 I 4.31 I 4903.29 8.82 I 5.92 I 4901.78 Average Groundwater Elevation** (ft amsl) = 4901.28 4899.51 4903.10 4901.96 Notes: *= Elevated readings due to persistent rains during spring and early -summer of 2023 ** = Inferred elevations for MW -3 and MW -4 ags = above ground surface amsl = above mean sea level bgs = below ground surface ft = feet SWL = Static Water Level TOC = Top of Casing Marcovich Mining Resource Groundwater Monitoring Plan WQCC Regulation 41 Interim Narrative Standards (INS) Tables 1— 4 Table 2 Analytes CAS No. Units INS Table 1 INS Table 2 INS Table 3 INS Table 4 Lowest INS Tables 1 - 4 Groundwater Quality Benc kmark Domestic Water Supply: Human Health Standards Domestic Water Supply: Drinking Water Standards Agricultural Standards TDS Water Quaity Standards Dissolved Aluminum 7429-90-5 mg/L -- -- 5 -- 5 Antimony 7440-36-0 mg/L 0.006 -- -- -- 0.006 Arsenic 7440-38-2 mg/L 0.01 -- 0.1 -- 0.01 Barium 7440-39-3 mg/L 2 -- -- -- 2 Beryllium 7440-41-7 mg/L 0.004 -- 0.1 -- 0.004 Boron 7440-42-8 mg/L -- -- 0.75 -- 0.75 Cadmium 7440-43-9 mg/L 0.005 -- 0.01 -- 0.005 Chloride 16887-00-6 mg/L -- 250 -- -- 250 Chromium (Total) [Cr(III) + Cr(VI)I 7440-47-3 mg/L 0.1 -- 0.1 -- 0.1 Cobalt 7440-48-4 mg/L -- -- 0.05 -- 0.05 Copper 7440-50-8 mg/L -- 1 0.2 -- 0.2 Flouride 16984-48-8 mg/L 4 -- 2 -- 2 Iron 7439-89-6 mg/L -- 0.3 5 -- 0.3 Lead 7439-92-1 mg/L 0.05 -- 0.1 -- 0.05 Lithium 7439-93-2 mg/L -- -- 2.5 -- 2.5 Manganese 7439-96-5 mg/L -- 0.05 0.2 -- 0.05 Molybdenum 7439-98-7 mg/L 0.21 -- -- -- 0.21 Nickel 7440-02-0 mg/L 0.1 -- 0.2 -- 0.1 Nitrate (NO3) 14797-55-8 mg/L 10 -- -- -- 10 Nitrite (N02) 14797-65-0 mg/L 1 -- 10 -- 1 Nitrate -Nitrite, Total (NO2 +NO3) -- mg/L 10 -- 100 -- 10 Selenium 7782-49-2 mg/L 0.05 -- 0.02 -- 0.02 Silver 7440-22-4 mg/L 0.05 -- -- -- 0.05 Sulfate 14808-79-8 mg/L -- 250 -- -- 250 Thallium 7440-28-0 mg/L 0.002 -- -- -- 0.002 Total Dissolved Solids (TDS) 10-33-3 mg/L -- -- -- Based on Result Based on Result Uranium 7440-61-1 mg/L 0.03 -- -- -- 0.03 Vanadium 7440-62-2 mg/L -- -- 0.1 -- 0.1 Zinc 7440-66-6 mg/L -- 5 2 -- 2 Other pH -- mg/L -- 6.5 - 8.5 6.5 - 8.5 -- 6.5 - 8.5 Notes: = Lowest INS Table Standard per Parameter All samples are filtered through 0.45 micron filter prior to preservation Parameters Excluded from Groundwater Monitoring Program: INS Table 1 INS Table 2 INS Table 3 INS Table 4 Total Coliforms (30 day average) Chlorophenol Mercury None Total Coliforms (max in 30 days) Color Asbestos Corrosivity Cyanide [Free] Foaming Agents Mercury Odor Gross Alpha Particle Activity Phenol Beta and Photon Emitters Marcovich Mining Resource Groundwater Monitoring Plan Baseline Groundwater Quality Results (To -Date) 2nd Quarter 2023 - 3rd Quarter 2024 Table 3 Anal to/Parameters Y CAS No. Sample Event: 1st Quarter Background Sampling Event 2nd Quarter Background Sampling Event 3rd Quarter Background Sampling Event 4th Quarter Background Sampling Event 5th Quarter Background Sampling Event 6th Quarter Background Sampling Event Lowest INS Tables 1 -4 Groundwater Quality Standards Marcovich Site -Specific Groundwater Quality Benchmarks (To -Date) Sample ID: MW -1 MW -1D MW -2 MW -1 MW -2 MW -2D MW -1 MW -1D MW -2 MW -1 MW -2 MW -2D MW -1 MW -1D MW -2 MW -1 MW -2 MW -3 MW -3D MW -4 Date: 6/30/2023 6/30/2023 6/30/2023 9/27/2023 9/27/2023 9/27/2023 12/14/2023 12/14/2023 12/14/2023 3/28/2024 3/28/2024 3/28/2024 6/25/2024 6/25/2024 6/25/2024 9/17/2024 9/17/2024 9/17/2024 9/17/2024 9/17/2024 Type: Grab QA/QC Grab Grab Grab QA/QC Grab QA/QC Grab Grab Grab QA/QC Grab QA/QC Grab Grab Grab Grab QA/QC Grab Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L Dissolved Aluminum 7429-90-5 mg/L 0.017 0.019 0.015 0.003 0.002 0.003 0.004 0.004 0.008 0.003 0.003 0.004 0.009 0.005 0.002 0.003 0.005 0.012 0.011 0.011 5 5 Antimony 7440-36-0 mg/L 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.006 0.006 Arsenic 7440-38-2 mg/L 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0008 0.0008 0.0006 U 0.01 0.01 Barium 7440-39-3 mg/L 0.0867 0.086 0.0886 0.0955 0.1046 0.1052 0.0986 0.0942 0.0738 0.0958 0.0769 0.0782 0.0916 0.0975 0.0817 0.0969 0.0929 0.1047 0.1024 0.0964 2 2 Beryllium 7440-41-7 mg/L 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.004 0.004 Boron 7440-42-8 mg/L 0.33 0.32 0.3 0.29 0.27 0.28 0.2 0.2 0.16 0.28 0.21 0.2 0.29 0.29 0.24 0.25 0.23 0.16 0.16 0.21 0.75 0.75 Cadmium 7440-43-9 mg/L 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 0.0001 0.0003 0.005 0.005 Chloride 16887-00-6 mg/L 201.2 201.99 223.45 201 274 274 200 203 201 213 200 200 198 215 173 227 224 147 142 166 250 274 Chromium (Total) ICr(III) + Cr(VI)] 7440-47-3 mg/L 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.1 0.1 Cobalt 7440-48-4 mg/L 0.0003 0.0002 0.0011 0.0002 0.0004 0.0004 0.0002 0.0002 0.0003 0.0002 0.0002 0.0002 0.0002 0.0002 0.0006 0.0002 0.0003 0.0003 0.0003 0.0026 0.05 0.05 Copper 7440-50-8 mg/L 0.0018 0.002 0.0019 0.0016 0.0017 0.0018 0.0017 0.0015 0.0015 0.0011 0.0012 0.0013 0.0011 0.0014 0.0019 0.0016 0.0019 0.0096 0.0081 0.0034 0.2 0.2 Flouride 16984-48-8 mg/L 1.18 1.18 1.25 1.26 1.14 1.16 1.11 1.14 1.01 1.16 1.06 1.05 1.09 1.21 0.98 1.03 0.94 1.5 1.47 0.99 2 2 Iron 7439-89-6 mg/L 0.005 U 0.005 U 0.009 0.005 U 0.005 U 0.005 U 0.005 U 0.005 U 0.006 0.005 U 0.005 U 0.005 0.005 U 0.005 U 0.005 U 0.005 U 0.005 U 0.005 U 0.005 U 0.005 U 0.3 0.3 Lead 7439-92-1 mg/L 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.05 0.05 Lithium 7439-93-2 mg/L 0.033 0.033 0.028 0.046 0.042 0.045 0.039 0.039 0.032 0.037 0.028 0.028 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 2.5 2.5 Manganese 7439-96-5 mg/L 0.0144 0.0148 0.0041 0.0008 U 0.0025 0.0027 0.0008 U 0.0008 U 0.0015 0.0008 U 0.0009 0.0008 U 0.0008 0.0008 U 0.0023 0.0008 U 0.0014 0.0043 0.0037 0.1128 0.05 0.1128 Molybdenum 7439-98-7 mg/L 0.0099 0.0102 0.004 0.0058 0.0033 0.0036 0.0056 0.0056 0.0024 0.004 0.0024 0.0023 0.0036 0.0033 0.0032 0.0052 0.0026 0.0119 0.0113 0.0112 0.21 0.21 Nickel 7440-02-0 mg/L 0.0029 0.003 0.0027 0.0021 0.0024 0.0026 0.002 0.002 0.0018 0.0019 0.0017 0.0016 0.002 0.002 0.002 0.0021 0.0021 0.0019 0.0017 0.0037 0.1 0.1 Nitrate (NO3) 14797-55-8 mg/L 19.37 19.48 14.96 15.3 13.8 13.6 15.5 15.9 12 11.9 14.6 14.5 9.28 9.79 6.56 12.5 12 3.34 3.34 2.41 10 19.48 Nitrite (NO2) 14797-65-0 mg/L 0.3 U 0.3 U 0.3 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 1 1 Nitrate -Nitrite, Total (NO2+NO3) -- mg/L 19.37 19.48 14.96 15.3 13.8 13.6 15.5 15.9 12 11.9 14.6 14.5 9.28 9.79 6.56 12.5 12 3.34 3.34 2.41 10 19.48 Selenium 7782-49-2 mg/L 0.0033 0.0041 0.0037 0.0023 0.0039 0.0035 0.0025 0.0023 0.002 0.001 0.0016 0.0013 0.0023 0.0021 0.0023 0.002 0.002 0.002 0.002 0.0011 0.02 0.02 Silver 7440-22-4 mg/L 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.05 0.05 Sulfate 14808-79-8 mg/L 249.51 251.21 286.72 264 292 290 236 240 223 579 210 210 215 243 176 246 218 151 144 183 250 579 Thallium 7440-28-0 mg/L 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0005 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.002 0.002 Total Dissolved Solids (TDS) 10-33-3 mg/L 1160 1187 1087 1006 1254 1192 1150 1112 904 1142 956 964 1254 1373 1193 1123 966 675 631 730 1716.25 ' 1716.25 Uranium 7440-61-1 mg/L 0.0199 0.019 0.0219 0.0159 0.0104 0.0115 0.0114 0.0091 0.0049 0.0185 0.0072 0.009 0.0309 0.0321 0.0102 0.0153 0.0041 0.0043 0.0041 0.0063 0.03 0.0321 Vanadium 7440-62-2 mg/L 0.001 U 0.001 U 0.001 0.001 0.001 0.001 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 0.001 U 0.001 0.001 0.001 U 0.1 0.1 Zinc 7440-66-6 mg/L 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 0.001 0.001 U 0.001 U 0.001 U 0.001 0.002 0.003 0.002 0.004 2 2 Other pH -- su 7.0 7.0 6.9 7.3 7.0 7.0 6.9 7.0 6.7 7.0 6.8 6.8 7.2 7.2 7.1 7.1 6.8 7.1 7.1 6.9 6.5 - 8.5 6.5 - 8.5 Notes: = Marcovich Site -Specific Groundwater Quality Benchmark value per Baseline sampling results (to -date) = Marcovich Groundwater Quality Benchmark value based on lowest applicable INS Tables 1 - 4 standard = Background concentration result exceeds lowest applicable INS Tables 1 - 4 standard = Highest Background TDS value Bold = Concentration detected above reporting limit = Calculated Value (Per WQCC Regulation No. 41, for Background TDS Value between 501 - 10,000 mg/L. the Maximum Allowable TDS Concentration is 1.25 times the background value) BKG = Background INS = Interim Narrative Standard mg/L = milligrams per liter POC = Point of Compliance su = standard unit U = Analyte not detected above reporting limit WQCC = Water Quality Control Commission APPENDIX A MONITORING WELL CONSTRUCTION LOGS ASPHALT SPECIALTIES CO. 345 W. 62nd Ave. Denver, CO 80216 Phone: 303-289-8555 em GRAPHIC O LOG -2 —1 0 2 _ 3 4 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Asphalt Specialties Co., Inc. Marcovich Mining Resource Monitoring Well Construction Log: MW -1 Date: 6/29/2023 Drilling Company:Terracon Drilling Method: Hollow Stem Auger (HSA) Sand and gavel, tan, dry (Alluvium) moisture present at -3 ft bgs (% gravel increasing w/ depth) wet at - 4 ft bgs LITHOLOGIC DESCRIPTION Sandy silt/clay, brown, dry (Overburden) Well Material: 2" Schedule 40 PVC Well Lat. / Long.: 40.063479° / -104.819044° Ground Elevation: 4,906.5 ft amsl WELL CONSTRUCTION Total Depth of Boring 30 feet bgs a) APPROX. DEPTH TO WATER (Drilling) 6 ft bgs j q r — 4.910 4.909 J 4.908 4.907 4.906 4,905 4,904 4,903 4,902 4,901 _ 4,900 4,899 4,898 _ 4,897 4,896 4,895 4,894 _ 4,893 4,892 4,891 4,890 _ 4,889 4,888 4,887 4,886 _ 4,885 4,884 4,883 4,882 4,881 _ 4,880 _ 4,879 4,878 4,877 ASPHALT SPECIALTIES CO. 345 W. 62nd Ave. Denver, CO 80216 Phone: 303-289-8555 Asphalt Specialties Co., Inc. Marcovich Mining Resource Monitoring Well Construction Log: MW -2 Date: 6/22/2023 Drilling Company: Terracon Drilling Method: Hollow Stem Auger (HSA) Well Material: 2" Schedule 40 PVC Well Lat. / Long.: 40.065363° / -104.821855° Ground Elevation: 4,904.4 ft amsl GRAPHIC LOG LITHOLOGIC DESCRIPTION WELL CONSTRUCTION 2 0 Ground Surface Concrete Pad \ 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 Sandy clay/silt, brown, dry (Overburden) Sand and gravel, tan, dry (Alluvium) moisture present at —5 ft bgs wet at - 6 ft bgs % gravel increasing w/ depth Bentonite Seal iTop of Shale encountered at 34.5 feet bgs (Bedrock) APPROX. DEPTH TO WATER (Drilling) C .�. O N i° _ r w 4.907 4.906 4.905 4.904 5 ft bgs 4.903 4,902 4,901 4,900 _ 4,899 4,898 4,897 4,896 4,895 _ 4,894 4,893 _ 4,892 _ 4,891 _ 4,890 4,889 _ 4,888 _ 4,887 4,886 4,885 4,884 4,883 4,882 4,881 _ 4,880 4,879 4,878 _ 4,877 _ 4,876 4,875 _ 4,874 4,873 4,872 4,871 _ 4,870 ASPHALT SPECIALTIES CO. 345 W. 62nd Ave. Denver, CO 80216 Phone: 303-289-8555 GRAPHIC LOG Asphalt Specialties Co., Inc. Marcovich Mining Resource Monitoring Well Construction Log: MW -3 Date: 9/5/2024 Drilling Company:Terracon Drilling Method: Hollow Stem Auger (HSA) LITHOLOGIC DESCRIPTION Ground Surface Sandy clay/silt, brown, dry (Overburden) I Sand with gravel, tan, dry (Alluvium) 6 moisture present at -5 ft bgs wet at-6ftbgs 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 % gravel increasing w/ depth 25 Total Depth of Boring 25 feet bgs Well Material: 2" Schedule 40 PVC Well Lat. / Long.: 40.061470° / -104.820161° Ground Elevation: 4,907.6 ft amsl WELL CONSTRUCTION APPROX. DEPTH TO WATER (Drilling) 6 ft bgs 4.911 4.910 4.909 4.908 4,907 _ 4,906 4,905 4,904 _ 4,903 4,902 4,901 _ 4,900 4,899 4,898 4,897 _ 4,896 4,895 4,894 _ 4,893 4,892 4,891 _ 4,890 _ 4,889 _ 4,888 4,887 4,886 4,885 _ 4,884 4,883 ASPHALT SPECIALTIES CO. 1 2 3 4 5 6 I. 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 345 W. 62nd Ave Denver, CO 80216 Phone: 303-289-8555 GRAPHIC LOG Asphalt Specialties Co., Inc. Marcovich Mining Resource Monitoring Well Construction Log: MW -4 Date: 9/5/2024 Drilling Company:Terracon Drilling Method: Hollow Stem Auger (HSA) LITHOLOGIC DESCRIPTION Ground Surface Sandy clay/silt, brown, dry (Overburden) Sand with gravel, tan, dry (Alluvium) wet at-6ftbgs % gravel increasing w/ depth Sandy Gravel - 22 ft bgs [Total Depth of Boring 25 feet bgs Well Material: 2" Schedule 40 PVC Well Lat. / Long.: 40.062438° / -104.823413° Ground Elevation: 4,907.7 ft amsl WELL CONSTRUCTION Concrete Pad Protective Casing APPROX. DEPTH TO WATER (Drilling) 4.911 4.910 4.909 4.908 6 ft bgs 4,907 4,906 4,905 _ 4,904 _ 4,903 _ 4,902 4,901 4,900 _ 4,899 _ 4,898 _ 4,897 4,896 4,895 4,894 _ 4,893 4,892 4,891 4,890 _ 4,889 4,888 4,887 4,886 4,885 4,884 _ 4,883 Appendix G-3 Groundwater Model Marcovich Gravel Pit November 2024 © Lewicki & Associates AMERICAN WATER ENGINEERING SERVICES, LLC DEWATERING EVALUATION REPORT ASCI MARCOVICH MINE WELD COUNTY, COLORADO AWES PROJECT # 2024 ASCI-01 OCTOBER 2024 Prepared for: Asphalt Specialties Co., Inc. (ASCI) 345 W. 62nd Ave. Denver, CO 80216 Prepared by: AWES, LLC 4809 Four Star Ct. Fort Collins, CO 80524 Introduction The following report presents the results of a hydrogeologic evaluation regarding a proposed dry mine gravel quarry operation to be operated by Asphalt Specialties Company, Inc., (ASCI) near Fort Lupton, Colorado. ASCI identifies the proposed mine as the Marcovich Pit. This evaluation consisted of reviewing available hydrogeologic data and inputting those data into a numerical groundwater flow model. The model was then used to estimate the effects of dewatering operations on the surrounding groundwater hydrology. This report was prepared as part of an OMLR 112 permit application. The site location is depicted on Figure 1. Background Information The majority of the proposed gravel quarry is located in NE1/4 of the SW1/4 of Section 7 Township 1 North, Range 66 West of the 6th Principal Meridian. The surrounding land use consists of agricultural, rural residential and oil and gas gathering. The proposed disturbed mine area occupies an estimated 44 acres. The anticipated extraction depth is anticipated to vary between 25 and 35 feet below grade. Information provided by geotechnical investigations, monitoring well water level data and water resource evaluation reports document the local and regional hydrogeology. Between June 2023 and September 2024, four soil borings were drilled from ground surface to bedrock to determine the potential aggregate mass within the proposed mine boundary. All borings were competed as two-inch diameter monitoring wells. Soil boring and well logs are provided as Appendix A. Bedrock elevations were obtained from mine geotechnical studies, and well records from the State of Colorado Division of Water Resources (Division). The depth to bedrock within the proposed mine pit boundaries varied between 25 and 35 feet below ground surface. In general soil conditions consist of two to four feet of top soil and sandy clay underlain by 25 to 35 feet of sand and gravel. The coarse alluvial deposits are underlain by bedrock which consists of siltstone, sandstone and claystone. Dewatering Evaluation Report Asphalt Specialties Company, Inc. Marcovich Pit Page 3 Based on domestic and municipal well test records the hydraulic conductivity of the sand and gravel deposits varied between 93 and 746 feet per day. A hydraulic conductivity of 200 feet per day was used for model simulations. The average effective porosity of the local sand and gravel deposits is estimated at 0.27. The natural hydraulic gradient as documented by past water resource investigation reports and measured water table elevation data is on the order of 0.0024 feet per foot within the coarse alluvial deposits. The average depth to groundwater measured in the ASCI monitoring wells was 4.61 feet below ground surface (annual high and low average). The natural groundwater flow direction within the mine area is to the north-northwest. Within the model area the groundwater flow direction varies from northeast to northwest. Seasonal water table fluctuations of between two and three feet were documented by ASCI; however, fluctuations of greater than ten feet have been documented during drought conditions (Schneider, 1983). The mine area and model boundary are depicted on Figure 1. A slurry wall will be installed at the extent of the mining area as depicted on the model boundary condition Plate. Mining will consist of dry mining and the water table in the pit will be drawn down to the pit bottom or bedrock by allowing groundwater to flow from the side walls of the excavation into ditches excavated into the bedrock or pit bottom. The ditches will be sloped so water drains to predetermined pump locations. The water is then pumped from the excavation into a discharge trench, which will eventually outfall to the South Platte River. Project Assumptions The following are assumptions made in estimating the slurry wall and pit dewatering effects. • The aquifer within the model boundary is heterogeneous and anisotropic. • The average water table altitude within the mine area varies between 4899 and 4903 feet above mean sea level. • The average horizontal hydraulic conductivity (K) of the sand and gravel deposits is 200 feet per day and the vertical K value is 20 feet per day. A 1.5 inch recharge rate from precipitation was assigned to the entire model area. • The vertical hydraulic conductivity of the South Platte River bed is 4 feet per day. • The hydraulic conductivity of the slurry wall material is 0.001 feet per day with a wall thickness of 4feet. • Other than dewatering associated with the pits no other aquifer stresses such as drought and surrounding well use were modeled. • All groundwater solutions are steady state. • The bedrock which underlies the coarse alluvial deposits is an impermeable barrier. Dewatering Evaluation Report Asphalt Specialties Company, Inc. Marcovich Pit Page 4 Model Parameters The effects of dewatering on groundwater flow within the study area were evaluated by using the three dimensional groundwater flow model Visual ModFlow Pro (VMOD). The general parameters used in the model are presented below. The model grid is depicted on Plate 1. A model grid cross section is presented as Plate 2. • The model boundary is 5000 feet (east -west) by 4500 feet (north -south); • The model grid is 90 rows by 100 columns or 9000 cells; • Two layers were used in the model with the upper layer representing unconsolidated alluvial deposits and the lower layer representing bedrock; • The thickness of the upper layer varied between 24 and 35 feet within the pit areas; • Constant head boundaries were assigned for the dewatering line sinks.; • River boundaries were assigned for the South Platte River; • Barrier walls were assigned to the slurry walls for shadow and mounding simulations; and, • General head boundaries were assigned to the model perimeter. A uniform flow field was defined in the model with an unconfined aquifer. Water levels obtained from published water level data and existing monitoring well data were used to generate water level contours unaffected by any pumping influences. Water level data within the mine boundaries were used to calibrate the model based on observed conditions. Ground surface and bedrock elevations were obtained from site surveys, drill hole data, water well records and USGS maps. The ground surface and bedrock elevations were input into the geo-statistical model Surfer®, which created surface and bedrock contour maps. These surface and bedrock elevation data were imported into VMOD to define the ground surface and bedrock elevations within the flow model. The river stage elevations were extrapolated from available groundwater data and historic USGS groundwater contours. Water table elevations measured in on -site piezometers over a 15 month period were averaged and these elevations were used in the calibration process. Water table contours generated from measured water levels (ASCI wells) are presented on Figure 2. The model boundary was superimposed over a topographic map and the author generated hand drawn contours that best reflected measured groundwater and surface water elevations. General head boundaries were assigned to the model perimeter and head elevations were assigned where hand drawn elevations intersected the model boundary. The model was then ran and model predicted heads were compared to observed heads. After the calibration process was completed the "cell inspector" function was used to determine the predicted head elevation for model assigned wells. The head elevations at the model assigned wells prior to any mining activities were used as a baseline to measure the effects of dewatering and mine slurry wall installations. The calibration simulation included seepage from the river boundaries which included the South Platte River. The calibration simulation is depicted on Plate 3. The model calculated head values as depicted on the calibration head graph are depicted on Plate 4. Plate 5 depicts calibration boundary conditions. Dewatering Evaluation Report Asphalt Specialties Company, Inc. Marcovich Pit Page 5 To evaluate the effects of the slurry walls on the local groundwater hydrology, barrier walls were assigned near the excavation limits of the pit. A model simulation was then ran to predict the effects of the slurry walls on the groundwater hydrology. Plate 6 depicts predicted groundwater contours for post slurry wall conditions. The calibration graph for this simulation is depicted on Plate 7. To simulate the effects of mine dewatering constant head line sinks were assigned to cells within the pit with head values approximately four feet above the bedrock elevation, which accounts for the predicted seepage face. To account for significant differences in bedrock elevations linear gradients were assigned to the line sinks where appropriate. Predicted groundwater contours resulting from mine dewatering are presented on Plate 8. Calibration graph for the dewatering simulation are presented on Plate 8. Tables 1 presents the predicted water level changes resulting from the slurry wall installations and dewatering for the ultimate pit depth. ASCI intends to reclaim the mine as a surface water storage pond. The reclamation plan indicates a pond water elevation of 4900 feet. A constant head line source was placed within the barrier wall and a simulation ran to evaluate the effects of water storage. Simulation contours are presented on Plate 10 and the calibration graph is presented as Plate 11. A review of these Plates show that no hydrology changes are predicted as a result of water storage. Table 1— Simulation Water Levels Point Distance to Slurry Wall (ft.) Calibration Water Level (ft.) Dewatering Water Level (ft.) Post Slurry Wall Water Level (ft) Dewatering Elevation Difference (ft.) Post Slurry Wall Elevation Difference (ft.) MW -1 100 4897.88 4896.91 4896.92 -0.97 -0.96 MW -2 100 4902.49 4903.87 4903.88 1.38 1.39 MW -3 50 4898.76 4897.89 4897.90 -0.87 -0.86 MW -4 50 4900.63 4901.64 4901.65 1.01 1.02 Results A review of Table 1 shows that the groundwater hydrology exhibits minor shadow and mounding effects from the slurry walls with very minimal influences from dewatering. Wells MW -2 and MW -4 are located on the upstream side of the barrier walls and MW -1 and MW -3 are on the downstream side of the walls. The model predicts mine dewatering will result in a drawdown of much less than one foot in all directions from the mine faces. A review of Table 1 shows that the predicted groundwater mounding and drawdowns immediately up and downgradient of the slurry wall are within the range of normal seasonal water table elevation changes. Conclusions The results of numerical solutions indicate that the proposed mine dewatering activities will not adversely affect the regional groundwater hydrology. In the author's opinion one cannot reasonably differentiate the head differences of seasonal groundwater fluctuations and head Dewatering Evaluation Report Asphalt Specialties Company, Inc. Marcovich Pit Page 6 differences created by mining activities — they are both within expected seasonal head variations. The placement of the slurry wall substantially mitigates the effects of dewatering and will substantially reduce the pumping rate required for dry mining. If required, groundwater mounding resulting from the placement of the slurry wall can be mitigated by installing a single drain and associated infiltration gallery. This report was prepared by AWES, LLC Date: 10/03/2024 Joby L. Adams, P.G., REM Principal/Hydrogeologist REFERENCES Colton, R.B., and Fitch, H.R., 1974, Map showing potential sources of gravel and crushed -rock aggregate in the Boulder -Fort Collins -Greeley area, Front Range Urban Corridor, Colorado: U.S. Geol. Survey Misc. Geol. Inv. Map I -855-D. Schneider, P. A., 1983, Shallow groundwater in the Boulder —Fort Collins —Greeley area, Colorado, 1975-77: U.S. Geological Survey Water Resources Investigation Report 83-4058. APPENDIX A BORING LOGS ASPHALT SPECIALTIES CO. 345 W. 62nd Ave. Denver, CO 80216 Phone: 303-289-8555 GRAPHIC LOG Asphalt Specialties Co., Inc. Marcovich Mining Resource Monitoring Well Construction Log: MW -1 Date: 6/29/2023 Drilling Company:Terracon Drilling Method: Hollow Stem Auger (HSA) LITHOLOGIC DESCRIPTION Ground Surface Sandy silt/clay, brown, dry (Overburden) Sand and gavel, tan, dry (Alluvium) moisture present at -3 ft bgs (% gravel increasing w/ depth) wet at - 4 ft bgs Total Depth of Boring 30 feet bgs Well Material: 2" Schedule 40 PVC Well Lat. / Long.: 40.063479° / -104.819044° Ground Elevation: 4,906.5 ft amsl WELL CONSTRUCTION Concrete Pad Protective Casing a) APPROX. DEPTH TO WATER (Drilling) 6 ft bgs j q 4.910 4.909 4.908 4.907 4.906 4,905 4,904 4,903 _ 4,902 4,901 _ 4,900 _ 4,899 _ 4,898 _ 4,897 4,896 4,895 4,894 _ 4,893 4,892 4,891 4,890 4,889 4,888 4,887 4,886 4,885 4,884 _ 4,883 _ 4,882 _ 4,881 _ 4,880 _ 4,879 _ 4,878 _ 4,877 ASPHALT SPECIALTIES CO. 0 3 5 6 _ 7 8 - 9 10 11 13 14 15 16 17 18 19 20 21 22 23 24 28 26 27 26 I 29 ._ 30 31 32 33 34 345 W. 62nd Ave. Denver, CO 80216 Phone: 303-289-8555 f Asphalt Specialties Co., Inc. Marcovich Mining Resource Monitoring Well Construction Log: MW -2 Date: 6/22/2023 Drilling Company: Terracon Drilling Method: Hollow Stem Auger (HSA) Well Material: 2" Schedule 40 PVC Well Lat. / Long.: 40.065363° / -104.821855° Ground Elevation: 4,904.4 ft amsl LITHOLOGIC DESCRIPTION WELL CONSTRUCTION Ground Surface Concrete Pad l Sandy clay/silt, brown, dry (Overburden) Sand and gravel, tan, dry (Alluvium) moisture present at —5 ft bgs wet at - 6 ft bgs % gravel increasing w/ depth Bentonite Se 10/20 Silica Sand Pack Protective Casing APPROX. DEPTH TO WATER (Drilling) C .�. O N i° d� _ w 4.907 4.906 4.905 4.904 - 0.010" Slotted Screen 5 ft bgs Top of Shale encountered at 34.5 feet bgs (Bedrock) 4.903 4,902 4,901 4,900 _ 4,899 4,898 4,897 4,896 4,895 _ 4,894 4,893 4,892 _ 4,891 _ 4,890 4,889 _ 4,888 _ 4,887 4,886 4,885 4,884 4,883 4,882 4,881 _ 4,880 4,879 4,878 4,877 4,876 4,875 4,874 4,873 4,872 4,871 _ 4,870 ASPHALT SPECIAL TI ES CO. 345 W. 62nd Ave. Denver, CO 80216 Phone: 303-289-8555 Asphalt Specialties Co., Inc. Marcovich Mining Resource Monitoring Well Construction Log: MW -3 Date: 9/5/2024 Drilling Company:Terracon Drilling Method: Hollow Stem Auger (HSA) Well Material: 2" Schedule 40 PVC Well Lat. / Long.: 40.061470° / -104.820161° Ground Elevation: 4,907.6 ft amsl GRAPHIC LOG 9 10 11 12 13 14 15 16 17 18 19 20 _ !: 21 22 23 LITHOLOGIC DESCRIPTION Ground Surface Sandy clay/silt, brown, dry (Overburden) Sand with gravel, tan, dry (Alluvium) moisture present at -5 ft bgs � wet at - 6 ft bgs % gravel increasing w/ depth 24 25 Total Depth of Boring 25 feet bgs WELL CONSTRUCTION Protective Casing L a) APPROX. DEPTH TO WATER (Drilling) 4.911 4.910 4.909 4.908 6 ft bgs 4,907 _ 4,906 4,905 4,904 _ 4,903 4,902 4,901 - 4,900 4,899 4,898 4,897 _ - 4,896 4,895 4,894 _ 4,893 _ - 4,892 4,891 _ 4,890 _ 4,889 _ - 4,888 4,887 4,886 4,885 _ 4,884 4,883 ASPHALT 1 2 3 4 5 6 7 9 10 _ 12 13 14 15 16 17 18 19 20 21 22 23 25 SPECIALTIES CO. 345 W. 62nd Ave_ Denver, CO 80216 Phone: 303-289-8555 GRAPHIC LOG Asphalt Specialties Co., Inc. Marcovich Mining Resource Monitoring Well Construction Log: MW -4 Date: 9/5/2024 Drilling Company:Terracon Drilling Method: Hollow Stem Auger (HSA) LITHOLOGIC DESCRIPTION Ground Surface Sandy clay/silt, brown, dry (Overburden) Sand with gravel, tan, dry (Alluvium) wet at-6ftbgs % gravel increasing w/ depth Sandy Gravel - 22 ft bgs f Total Depth of Boring 25 feet bgs Well Material: 2" Schedule 40 PVC Well Lat. / Long.: 40.062438° / -104.823413° Ground Elevation: 4,907.7 ft amsl WELL CONSTRUCTION Concrete Pad \ Protective Casing APPROX. DEPTH TO WATER (Drilling) 4.911 4.910 4.909 4.908 6 ft bgs 4,907 4,906 _ 4,905 _ 4,904 _ 4,903 _ 4,902 _ 4,901 4,900 _ 4,899 4,898 _ 4,897 4,896 4,895 4,894 4,893 4,892 4,891 4,890 _ 4,889 4,888 4,887 4,886 _ 4,885 4,884 _ 4,883 Figure 1 - Site Location Map r9a�!r.0 o f I lk� TN MN 8�° 1945 O. 4949 47 "'t e Approximate Mine Boundary 4.9 ) • r Well Lone Pine _sue_ Pit r 440 7, . - Wells ,9M A92e !_ 4932 1 MILE I E _ X470 f€c{ 0 — 103 ME ITS Map created with TOPO® @2002 National veopaphic(www.nafio* eogapkac.corrd{opo] czslias • H{IJaide Cemetery PLATE 1- Model Grid O 0 0 0 0- O 0 M 4 C. i O O N O O ro 0 N 0 M, - MW -3 T = NW4 _ E 0 0 700 1400 2100 2800 3500 4200 5000 ASCI Marcovich Pit Model Grid Map Weld County, Colorado Company: AWES, LLC Project: Marcovich Pit VMOD Simulations Modeller: JLA ASCI Marcovich Pit Calibratrion Simulation Weld County, Colorado Company: AWES, LLC Project: Marcovich Pit VMOD Simulations Modeller: JLA Plate 4 - Calibration Head Graph ■ Layer #1 95% confidence interval 95% interval MW -2/B Observed = 4902.49 Calculated = 4902.49 rn rn w MW -4/D Observed = 4900.63 Calculated = 4900.63 MW -3/C Observed = 4898.76 Calculated = 4898.76 MW -1/A Observed = 4897.88 Calculated = 4897.88 4897.79 4898.79 Max. Residual: 0.005 (ft) at MW -3/C Min. Residual: 0.001 (ft) at MW -1/A Residual Mean : 0.002 (ft) Abs. Residual Mean : 0.003 (ft) 4899.79 4900.79 Observed Head (ft) 4901.79 Num. of Data Points : 4 Standard Error of the Estimate : 0.002 (ft) Root Mean Squared : 0.004 (ft) Normalized RMS : 0.081 ( % ) Correlation Coefficient : 1 Cali Marcovich Pit. Weldreounty Simulation Company: AWES, LLC Project: Marcovich Pit VMOD Simulations Modeller: JLA Plate 5 - Model Boundary Conditions 0 0 0 N 0 0_ M 0 0- 0 M 0 o_ N 0 0 0 0 0- N 0 0- H- River Boundary MW -1 700 1400 2100 MW -4 omputer Assigned Wells General Head Boundary 2800 3500 4200 5000 ASCI Marcovich Pit Calibratrion Boundary Conditions Weld County, Colorado Company: AWES, LLC Project: Marcovich Pit VMOD Simulations Modeller: JLA Plate 6 - Slurry Wall Simulation 0 0 o o p o_ O ° o 0 0- 0 M 0 o_ N 0 0 oo 0- 0 - so, o 0 0- 0 X04.0 M-2 _ MWa1 L MW4 g90a°O 0 1 700 1400 2100 2800 3500 4200 5000 ASCI Marcovich Pit Slurry Wall Simulation Weld County, Colorado Company: AWES, LLC Project: Marcovich Pit VMOD Simulations Modeller: JLA PLATE 7 - Slurry Wall Calibration Graph ■ Layer #1 95% confidence interval 95% interval MW -2/B Observed = 4902.49 Calculated = 4903.88 MW4/D Observed = 4900.63 Calculated = 4901.65 co -o o_ o a)rn V a) co _U U o oo rn w MW -3/C Observed = 4898.76 Calculated = 4897.90 MW -1/A Observed = 4897.88 Calculated = 4896.92 4898.78 Max. Residual: 1.387 (ft) at MW -2/B Min. Residual: -0.862 (ft) at MW -3/C Residual Mean : 0.146 (ft) Abs. Residual Mean : 1.057 (ft) 4900.78 Observed Head (ft) 4902.78 Num. of Data Points : 4 Standard Error of the Estimate : 0.615 (ft) Root Mean Squared : 1.076 (ft) Normalized RMS : 23.337 ( % ) Correlation Coefficient : 0.994 ASCI uMwwarcov.ich it vv el dyCounty iroI-ori o _ Company: AWES, LLC Project: Marcovich Pit VMOD Simulations Modeller: JLA Plate 8 - Dewatering Simulation 0 0 Lo 7r 0 o_ N 7r O 0- M O 0- O co O 0- 7 N O 0. O 0 0- N 0 0- 0 1400 2100 2800 3500 4200 0 700 5000 ASCI Marcovich Pit Dewatering Simulation Weld County, Colorado Company: AWES, LLC Project: Marcovich Pit VMOD Simulations Modeller: JLA Plate 9 - Dewatering Calibration Graph ■ Layer #1 95% confidence interval 95% interval MW -2/B Observed = 4902.49 Calculated = 4903.87 N- N _ O MW4/D Observed = 4900.63 Calculated = 4901.64 MW -3/C Observed = 4898.76 Calculated = 4897.89 MW -1/A Observed = 4897.88 Calculated = 4896.91 4898.77 Max. Residual: 1.38 (ft) at MW -2/B Min. Residual: -0.874 (ft) at MW -3/C Residual Mean : 0.137 (ft) Abs. Residual Mean : 1.059 (ft) 4900.77 Observed Head (ft) 4902.77 Num. of Data Points : 4 Standard Error of the Estimate : 0.616 (ft) Root Mean Squared : 1.076 (ft) Normalized RMS : 23.341 ( % ) Correlation Coefficient : 0.994 ASCI Marcovich Pit ldyCowwunty&Iorac�omg Simulation e Company: AWES, LLC Project: Marcovich Pit VMOD Simulations Modeller: JLA Plate 10 - Pond Storage Simulation ASCI Marcovich Pit Pond Storage Simulation Weld County, Colorado Company: AWES, LLC Fort Collins, CO Project: Marcovich Pit VMOD Simulations Modeller: JLA Plate 11- Pond Storage Graph ■ Layer #1 95% confidence interval 95% interval co -o o_ o a)rn V a) co _U U o oo rn w MW -2/B Observed = 4902.49 Calculated = 4903.88 MW4/D Observed = 4900.63 Calculated = 4901.65 MW -3/C Observed = 4898.76 Calculated = 4897.90 MW -1/A Observed = 4897.88 Calculated = 4896.92 4898.78 Max. Residual: 1.387 (ft) at MW -2/B Min. Residual: -0.863 (ft) at MW -3/C Residual Mean : 0.146 (ft) Abs. Residual Mean : 1.057 (ft) 4900.78 Observed Head (ft) 4902.78 Num. of Data Points : 4 Standard Error of the Estimate : 0.615 (ft) Root Mean Squared : 1.076 (ft) Normalized RMS : 23.339 ( % ) Correlation Coefficient : 0.994 ASV Marcovic.h Pit Weld ( o Storage S olatcon e gun ora o _ Company: AWES, LLC Fort Collins, CO Project: Marcovich Pit VMOD Simulations Modeller: JLA EXHIBIT H WILDLIFE INFORMATION 1. Introduction Given the location of the Marcovich Mining Resource just south of Fort Lupton, adjacent to the highway, and surrounded by an abundance of gravel pits and agricultural fields, it is safe to assume that wildlife habitat fragmentation has already occurred. Colorado Parks and Wildlife (CPW) habitat and range mapping has been used to develop this wildlife analysis. The CPW will be consulted as part of the mine permitting process. 2. Description of Significant Wildlife Resources on the Affected Land The affected land is within seasonal and general range of a few non -endangered species. There are no bald eagle nests within 5,000 feet of the site, but the site is considered part of a few bald eagle ranges: summer forage, winter forage, and winter concentration. The affected area is within the mule deer corridor and their severe and normal winter range. The site is not near any mule deer migration corridors or highway crossings. The site is also within the white-tailed deer concentration area and winter range. 3. Seasonal Use of the Area Bald eagles make use of the site as summer and winter forage, as well as a winter concentration area. Mule deer and white-tailed deer use the site as winter range. All other significant wildlife resources are year-round in their usage. 4. Presence and Estimated Population of Threatened or Endangered Species No federally listed threatened and endangered species and/or habitat were identified on the or immediately surrounding the affected land. 5. Effect of Proposed Operation on Existing Wildlife Impacts on wildlife use from the proposed project would include direct temporary elimination of potential habitat within the affected area during mining, and temporary localized displacement associated with additional noise and lighting from the proposed project. This localized loss of habitat would not disrupt regional migration or significant movement patterns and would not threaten the overall health and viability of any species. Nearby lands are also disturbed for Marcovich Gravel Pit November 2024 H-1 © Lewicki & Associates similar uses, and as such, the Marcovich Mining Resource will not cause a significant impact on the local area's wildlife habitat. The affected area will be fully reclaimed at the conclusion of mining which will restore some degree of wildlife habitat over time. Concurrent reclamation and phased mining will also help to reduce the total impact on wildlife. Transformation of the bulk of the agricultural fields onsite into water storage ponds will be a permanent change in overall habitat. 6. Impacts to Fish Mining will not take place in any water ways or natural lakes. Surface water controls will protect offsite drainages and fish habitats from sediment discharges. Asphalt Specialties will not stock the reclaimed lake with non-native species at any time. 7. Wildlife Surveys and Timing Limitations Black -tailed prairie dog colonies exist within the site. These are potential habitats for burrowing owls, a Colorado state -threatened species. The site will cultivate the fallow field to destroy all abandoned prairie dog burrows before March 15 so that burrowing owls cannot utilize burrows for nesting. Otherwise, a burrowing owl survey per Colorado Parks and Wildlife guidelines would need to be conducted for site disturbances that occur between March 15 and October 31. Marcovich Gravel Pit November 2024 H-2 © Lewicki & Associates EXHIBIT I 1. General SOILS INFORMATION A soil report was generated using the United States Department of Agriculture's NRCS Web Soil Survey (WSS)3 and is included in this exhibit as Appendix I-1 at the end of this exhibit. The WSS provides soil data and information produced by the National Cooperative Soil Survey. The majority of the site's soil consists of aquolls and aquents with a gravelly substratum in the eastern area, and the Ellicott -Ellicott sandy skeletal complex in the western area along the river (see Map C-1). The A -horizon of the soil profile was used as the basis for determining the topsoil stripping depth during mining operations. These primary soil types that exist at the site are described as follows. 2. Suitability for Reclamation Revegetation The two main soil types provide an average of two feet of suitable material for revegetation. The soil in the east (3-Aquolls and Aquents) is not considered prime farmland, but the soil in the west (10 -Ellicott -Ellicott sandy -skeletal complex) is considered prime farmland if irrigated. As the majority of the site will be reclaimed to a pond, converting the land back to agriculture is not considered for reclamation. However, the soil should be suitable to be used for rangeland as portions of the site currently are rangeland. Revegetating disturbances as rangeland will also complement the reclaimed land use of open space. 3. Soil Type Descriptions 3—Aquolls and Aquents, gravelly substratum Map Unit Setting National map unit symbol: 3627 Elevation: 4,000 to 7,200 feet Mean annual precipitation: 12 to 18 inches Mean annual air temperature: 45 to 55 degrees F Frost -free period: 80 to 155 days Farmland classification: Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Map Unit Composition Aquolls and similar soils:55 percent Aquents, gravelly substratum, and similar soils:30 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Aquolls Setting Landform: Swales, flood plains, streams Down -slope shape: Linear 3 https://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm. Marcovich Gravel Pit November 2024 1-1 © Lewicki & Associates Across -slope shape: Linear Parent material: Recent alluvium Typical profile H1 - 0 to 48 inches: loam H2 - 48 to 60 inches: gravelly sand Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high (0.20 to 2.00 in/hr) Depth to water table: About 6 to 48 inches Frequency of flooding: FrequentNone Frequency of ponding: None Maximum salinity: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 8.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6w Hydrologic Soil Group: D Ecological site: R067BY035CO - Salt Meadow Hydric soil rating: Yes Description of Aquents, Gravelly Substratum Setting Landform:S tream terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Recent alluvium Typical profile H1 - 0 to 48 inches: variable H2 - 48 to 60 inches: very gravelly sand Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat):Moderately high to very high (0.57 to 19.98 in/hr) Depth to water table: About 6 to 24 inches Frequency of flooding: Frequent None Frequency of ponding: None Calcium carbonate, maximum content:10 percent Maximum salinity: Nonsaline to moderately saline (0.0 to 8.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.6 inches) Interpretive groups Land capability classification (irrigated): 6w Land capability classification (nonirrigated): 6w Hydrologic Soil Group: D Ecological site: R067BY035CO - Salt Meadow Hydric soil rating: Yes Minor Components Bankard Percent of map unit:10 percent Hydric soil rating: No Ustic torrifluvents Marcovich Gravel Pit November 2024 1-2 © Lewicki & Associates Percent of map unit:5 percent Hydric soil rating: No 10 —Ellicott -Ellicott sandy -skeletal complex, 0 to 3 percent slopes, rarely flooded Map Unit Setting National map unit symbol: 2xsth Elevation: 3,950 to 5,960 feet Mean annual precipitation: 13 to 17 inches Mean annual air temperature: 50 to 54 degrees F Frost -free period: 135 to 165 days Farmland classification: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Ellicott, rarely flooded, and similar soils:65 percent Ellicott sandy -skeletal, rarely flooded, and similar soils:25 percent Minor components:10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ellicott, Rarely Flooded Setting Landform: Drainageways, flood plains on intermittent streams Down -slope shape: Linear Across -slope shape: Concave Parent material: Noncalcareous, stratified sandy alluvium Typical profile A - 0 to 4 inches: sand AC - 4 to 13 inches: sand Cl - 13 to 30 inches: sand C2 - 30 to 44 inches: sand C3 - 44 to 80 inches: coarse sand Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat):High to very high (13.00 to 39.96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: Rare Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Very low (about 2.1 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 7s Hydrologic Soil Group: A Ecological site: R067BY031 CO - Sandy Bottomland Hydric soil rating: No Description of Ellicott Sandy -skeletal, Rarely Flooded Setting Landform: Channels on drainageways, channels on intermittent streams Down -slope shape: Linear Across -slope shape: Concave, linear Parent material: Noncalcareous, stratified sandy alluvium Typical profile A - 0 to 4 inches: very gravelly coarse sand Marcovich Gravel Pit November 2024 1-3 © Lewicki & Associates AC - 4 to 13 inches: very gravelly sand Cl - 13 to 30 inches: very gravelly sand C2 - 30 to 44 inches: very gravelly sand C3 - 44 to 80 inches: very gravelly coarse sand Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat):High to very high (13.00 to 39.96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: Rare Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Very low (about 1.2 inches) Interpretive groups Land capability classification (irrigated): 4s Land capability classification (nonirrigated): 8s Hydrologic Soil Group: A Ecological site: R067BY031 CO - Sandy Bottomland Hydric soil rating: No Minor Components Haverson Percent of map unit:10 percent Landform: Terraces Landform position (three-dimensional):Tread Down -slope shape: Linear Across -slope shape: Linear Ecological site: R067BY036CO Overflow Hydric soil rating: No Marcovich Gravel Pit November 2024 1-4 © Lewicki & Associates Appendix I-1 Soil Report (Weld County USR: See Item 12 for Soil Report) Marcovich Gravel Pit November 2024 1-5 © Lewicki & Associates EXHIBIT J VEGETATION INFORMATION 1. Existing Vegetation Community The native vegetation at the Marcovich Mining Resource is mostly limited to the eastern banks of the Platte River and low-lying areas used for stock watering ponds. The remaining portions of the site are agricultural fields. The native vegetation that is present consists of mature cottonwoods galleries with a shrubby midstory. The understory is predominantly dry grasses and shrubs. Some small portions of the site contain dry rangeland vegetation. The remaining areas of the site are agricultural fields which do not contain native vegetation, and will be removed during mining. The reclamation plan aims to revegetate the site to similar conditions of the existing native rangeland vegetation. Figure J-1 Typical vegetation in river corridor Marcovich Gravel Pit November 2024 J-1 © Lewicki & Associates Figure J-2 Typical rangeland vegetation 2. Wetlands Wetlands identified on the site from the National Wetlands Inventory are shown on Map C-1. A preliminary investigation of wetlands onsite indicates only manmade structures are associated with wetlands. This is limited to a concrete ditch, return irrigation ditch, stock ponds, and a settling pond at the end of the concrete ditch. (see Appendix J-1). A full delineation will be conducted prior to mining in stock ponds area. 3. Estimated Carrying Capacity The final use for the site will be a water storage pond with surrounding rangeland which will serve as open space and public recreation. Since the pond makes up the vast majority of the site area, the rangeland is not anticipated to be used for grazing. Marcovich Gravel Pit November 2024 J-2 © Lewicki & Associates Appendix J-1 Wetlands Report Marcovich Gravel Pit November 2024 J-3 © Lewicki & Associates geos1QM Unmanned Autonomous System Solutions for Natural Resource Assessments, Management, Monitoring 1797 Trek Trail, Reno, Nevada, 89521 * (775) 287-9038 May 9, 2024 Mr. Greg Geras Land Resource Manager Asphalt Specialties 345 W. 62nd Ave. Denver, Colorado 80216 greg(cr�asphaltspecialties.corn SUBJECT: REVIEW OF AQUATIC RESOURCES AT THE APPROXIMATE 42 -ACRE PROJECT AREA (MARCOVICH MINE AREA) Dear Mr. Geras, Summary: Attachment 1, Figure la contains a site location map. Also attached is a map that delineates features that would potentially be under US Army Corps of Engineers (USACE) jurisdiction and what I believe are consistent with the proposed Colorado Gap rule and include the South Platte River and the an adjacent pond/impoundment (Attachment 1, Figure 3)1. The pond area is in my opinion connected to the South Platte River through shallow ground water and is therefore indistinguishable from the South Platte River. The area of the pond is approximately one acre. There was no vegetation at the pond boundary or fridge area on my March 31, 2024 site visit. The pond acts as an impoundment of the South Platte River and is therefore potentially subject to USACE/Environmental Protection Agency (EPA) jurisdiction. The older river floodplain, estimated at the 25 -year return interval, is also visible in aerial photos as the Cottonwood canopy and would be an area that should also be avoided by the proposed mining activities unless appropriate permits are procured prior to impacts. As stated during the field visit, only the USACE can determine jurisdiction under Section 404 of the Clean Water Act and any actions or work are conducted at the applicants own risk. It is unknown what affects, if any, the proposed Colorado gap rules may have in the future. Typically, methodologies consistent with the USACE standards/protocols for determining the presence or absence of waters of the United States (WOTUS)/wetland are determinated through field protocols/indicators and would also be consistent under what we believe are protocols for the Colorado gap rule2. 1There are draft bills identified and are referred to as 24-1379-McCluskie-McCormick and 2024a-127_01- Kirkmeyer. 2 A) 1987 USAGE Wetland Delineation Manual (1987-01, Y-87-1), 143 pages (https://usace.contentdm.ocic.org/digital/collection/p266001c oll 1 /id/4530), B) Regional Supplement to the Corps of Engineers, Wetland Delineation Manual Great Plains Region Version 2.0, 152 pages USACE ERDC/EL TR-10-3, March 2010, 152 pages D:\273326\Asphalt Specialities\Letter Opinion\opinion letter final draft r2.wpd 1 Letter Opinion - Review at the Approximate 42 -acre Project Area (Marcovich Mine Area) Page 2 The site contains existing agricultural fields that are proposed for sand mining activities. The goal of this work is to identify areas to avoid for future mining activities and to determine if there are areas that appear as waters of the United States (WOTUS)/wetlands and would need a formal aquatic resources delineation. In order to better understand the irrigation ditches and water movement through the site, I utilized USGS topographic maps, historical aerials, USGS National Hydrography Database (NHD), irrigation maps and watershed boundary lines to assess if any of the ditches are realigned tributaries3 (Attachment 1, Figures lb, 2a and 2b). A review of the data found the ditches are not realigned tributaries and that there are no other tributaries within the project area (other than the South Platte River). According to you (the Land Manager), the current irrigation ditches were constructed on uplands to convey supplemental irrigation water for use within the project site'. That finding is consistent with my findings and review of aerial photography between 1944 and 2024. The current fields were first apparent in aerial photography in 1949. (https://usace.contentdm.ocic.org/utils/getfile/collection/p266001 coll 1 /id/7613) C) Great Plains Regional Data Sheet (https://www.swg.usace.army.mil/Portals/26/docs/regulatory/Wetlands/greatplains df2.pdf), 2 pages D) USDA, NRCS, 2018 Field Indicators of Hydric Soils in the United States, Version 8.2, LM Vasilas, et.al. (https://www.nres.usda.gov/Internet/FSE DOCUMENTS/nres142p2 053171.pdf) E) Where appropriate, the 2012 Field Book for Describing and Sampling Soils, Version 3.0 NRCS, NSSC, Lincoln, NE (https://www.nres.usda.gov/Internet/FSE DOCUMENTS/nres142p2 052523.pdf) F) State of Colorado Hydric Soils List (https://www.nres.usda.gov/Internet/FSE DOCUMENTS/nreseprd1316619.html) G) USACE - 2018 National Wetland Plant List for Colorado (http://wetland-plants.usace.army.mil/nwpl static/v34/home/home.html) H) ERDC-CRREL TR-22-26.pdf, National Ordinary High Water Mark Field Delineation Manual for Rivers and Streams : Interim Version https://erdc-library.erdc.dren.mil/jspui/handle/11681/46102 US -EPA, 2019, April 10, Exemptions to Permit Requirement under CWA Section 404, 2 -pages, https://www.epa. gov/cwa-404/exemptions-permit-requirements-under-cwa-section-404 USACE, 2020, July 24, Joint Memorandum to the Field Between the US Department of the Army, Corps of Engineers and the US Environmental Protection Agency Concerning Exempt Construction or Maintenance of Irrigation Ditches and Exempt Maintenance of Drainage Ditches Under Section 404 of the Clean Water Act, 7 - pages https://www.epa.gov/sites/production/files/2020-07/documents/final_ ditch_ exemption_memo_j uly_2020_with_epa.p df USACE, 2007, July 4, RGL 07-02, Exemptions for Construction or Maintenance of Irrigation Ditches and Maintenance of Drainage Ditches Under Section 404 of Clean Water Act, 8 -pages, Superseded by USACE, 2020 July 24 Joint Memorandum, https://www.nap.usace.army.mil/Portals/39/docs/regulatory/rgls/rg107-02.pdf 4 In accordance with 33 CFR §323.4 (a) (3), Discharges not requiring permits states: Construction or maintenance offarm or stock ponds or irrigation ditches, or the maintenance (But not construction of) drainage ditches. Discharges associated with siphons, pumps, head gates, wing walls, weirs, diversion structures, and such other facilities as are appurtenant and functionally related to irrigation ditches are included in this exemption. D:\273326\Asphalt Specialities\Letter Opinion\opinion letter final draft r2.wpd 2 Letter Opinion - Review at the Approximate 42 -acre Project Area (Marcovich Mine Area) Page 3 Utilizing the rapid ordinary high water mark (OHWM) field identification sheet, the South Platte River is located on the western edge of the site, and there are two distinct floodplains that should be avoided and were delineated on Attachment 1, Figure 3, Attachment 3. The first appears to the active floodplain which would probably be within the active channel (2- to 5 -year return interval floodplain) and is adjacent to the South Platte River. The second contains the Cottonwood canopy and appears to the be the 25 -year return interval or the cottonwood recruitment floodplain (Attachment 3). In an abundance of caution, mining activity should stay out of these areas (Attachment 1, Figure 3). Without a formal floodplain model in HECRAS this recommendation is based on field indicators related to geomorphic, sediment, vegetation and ancillary indicators. Two soils pits were excavated to a depth of 50 inches within the site at the lowest elevation on the site (#1) and within an abandoned oxbow area within the cottonwood recruitment 25 -year return interval (#2). The groundwater level was at 48" in #1 and there was no groundwater present in #2. Soils were characterized according to the USACE Great Plains Supplement Data sheet (Attachment 2). There were no field indicators of current hydric soils including recent redoximorphic features. While the vegetation in the #2 did meet the criteria for hydrophytic vegetation, it is typical of abandoned oxbows and where supplemental irrigation was channeled. In sort, neither pit met the criteria for wetlands. Finally, given the standard for Clean Water Act Jurisdiction under Sackett v. Environmental Protection Agency, 598 U.S. 651 (2023), the east side of the project area where Asphalt Specialities is undertaking mining development as identified in Attachment 1, Figure 3, does not appear to be under USACE jurisdiction. No traditional interstate navigable water, impoundment, tributary or other WOTUS exist on the east side of the site, nor does it contain tributary channels that flow onto or across it. There are jurisdictional WOTUS areas located on the west side of the project site6. Utilizing the USACE rapid ordinary high water mark (OHWM) field identification data sheet, I walked the channel and floodplain within the study area and walked out to the bench for the active flowing river channel and developed a general understanding of the overall site characteristics. There were no anthropogenic influences on the channel system and the site conditions were consistent with historical photos dated between 1948 to 2024 from both historicaerials.com and googleearth. I was able to develop a general understanding of the geomorphology and vegetation at the site and observed their differences across the hydrogeomorphic floodplain visually from the active South Platte River channel to through the Cottonwood canopy. 6For wetlands to qualify as WOTUS, over which the USACE/EPA would have jurisdiction, wetlands must meet two tests: first, they must "qualify as `waters of the United States' in their own right" by being indistinguishably part of a "relatively permanent, standing or continuously flowing bod[y] of water `forming geographical features that are described in ordinary parlance as `streams, oceans, rivers and lakes;"' and second, they must have "a continuous surface connection with that water" such that "it is difficult to determine where the `water' ends and the `wetland' begins." Sackett, Slip op. at 14, 21-22. See also 40 C.F.R. 120.2(a)(4) (defining jurisdictional wetlands —or "(a)(4) waters" —as wetlands "adjacent" to (1) waters used in interstate or foreign commerce and waters subject to tides —commonly called traditional interstate navigable waters or "(a)(1) waters," or (2) relatively permanent, standing or continuously flowing impoundments or tributaries, referred to a "(a)(2) waters" and "(a)(3) waters," respectively); 40 C.F.R. 120.2(c) (defining "adjacent" as "having a continuous surface connection"). As explained in this memorandum, the areas on the eastern side of the site and do not include any (a)(1), (a)(2), (a)(3), or (a)(4) waters — rather, they are uplands which were artificially irrigated on a seasonal basis through a man-made ditch constructed on an upland and would be exempt. This report does not cover the state of Colorado D:\273326\Asphalt Specialities\Letter Opinion\opinion letter final draft r2.wpd 3 Letter Opinion - Review at the Approximate 42 -acre Project Area (Marcovich Mine Area) Page 4 Introduction: The proposed Marcovich Mine area is composed of approximately 42 acres and has agricultural fields containing supplemental irrigation ditches (Attachment 1, Figures 1a -1c). There was no supplemental water flowing in any of the irrigation ditches, nor any area of surface ponded water on the site during the site visit. Shallow groundwater was at approximately 48 -inches below the ground surface on March 31, 2024. According to local NOAA climate records approximately 1.78 inches of rainfall was received in March (slightly above the average of 1.21 inches) and at the site 0.38 inch was received six -days prior to the March 31, 2024 site visit. The site is indicative of poorly maintained agricultural fields where supplemental irrigation is captured and diverted to various areas to promote grasslands. Geos conducted several field tasks including walking the perimeter of the site, defining the ordinary high water mark (OHWM), and identifying avoidance/no entry areas related to any work activities. See Attachment 1, Figure 3 for defined work areas on the east side of the site where work activities could potentially take place given other local, state and potential other federal permits. Soil & Hydrology: The proposed Marcovich Mine area is complex in that it includes NRCS mapped hydric soils found in areas such as abandoned or historic oxbows (Attachment 1, Figures 2a and 2b, and Attachment 2 (Ellicott Sands, Atvan, Aquolls and Aquents-gravely substratum)). Two soil trenches were excavated by backhoe to a depth of fifty -inches at an old abandoned oxbow where the site is wettest, and in the adjacent field area (adjacent to the Cottonwood canopy) mapped as Atvan loam (but is actually a very coarse sand) (Attachment 1, Figure 2b). One soil trench was excavated in the lowest area in the historic oxbow and groundwater was encountered at a depth of 48 inches below land surface. This depth is too deep to induce wetland conditions. Ponded surface water was not found at the site. It appears this area ws filled prior to 1949. In the adjacent field (typical elevations across the site), a very coarse sand was encountered from eight inches to 48 inches below ground surface, before the trench walls collapsed. The top eight inches of soil appear to be imported fill composed of loamy materials similar the field to the south of the site. It is important to note that there were no recent field indicators for hydric soil such as concentrations, deletions, reduced matrix, oxidized rhizospheres on living roots, water marks, sediment deposits, or drift deposits per the USACE Great Plains wetland determinations data form in either soil trench profile. The site is what I would typically expect to find in poorly maintained irrigated pastures. Vegetation: Vegetation is consistent with irrigated areas with grasses and contains many weedy species such as cheatgrass, some reed canary grass and whitetop (broad -leafed pepperweed) with creeping wild rye, and willow species interspersed throughout the older oxbow area. The fields are also planted with more dryland grass species. While there is some wetland vegetation on the site it seems to be contained in the irrigated ditch areas and is drying (Attachment 2). pending gap water rule mainly because there is no current rule yet. D:\273326\Asphalt Specialities\Letter Opinion\opinion letter final draft r2.wpd 4 Letter Opinion - Review at the Approximate 42 -acre Project Area (Marcovich Mine Area) Page 5 Conclusion: For the purpose of this letter report, the area on the west side of the site should be avoided by any work activities, and the area on the east side of the site appears to be open to land disturbance activities given local, state and other federal permits. As stated during the field visit, due to recent federal regulatory changes under the Sackett decision and pending/potential Colorado state regulations, the presence or absence of an affirmative wetland finding is problematic, and a wetland delineation or aquatic resources determination can only be approved by the USACE. Even after reports could be completed, the area would be considered an atypical problem area due to the supplemental irrigation and could take upwards of a year to obtain a USACE approved jurisdictional determination. Aquatic resources identified herein would probably be consistent with Section 404 under the Sackett decision. However, due to the agricultural exemptions under both versions of the proposed Colorado Gap rules, these findings may also be sufficient for state requirements. Because you are avoiding the obvious areas that would meet WOTUS/wetland definitions (absent irrigation and other exemptions/exclusions) this letter may suffice to direct next tasks at a state level (Attachment 1, Figure 3). It is recommended that the areas shown in Attachment 1, Figure 3 be avoided by proposed mine activities. Please call me with any questions or concerns you may have. Respectfully submitted, /s Lori Carpenter, SPWS Hydrologist/Hydrogeologist cc: Mr. Benjamin H. Miller, PhD., ben@lewicki.biz ATTACHMENTS: Attachment 1 - Figures Attachment 1, Figure 1a Site Location Map Attachment 1, Figure lb Site Location Map - USGS Topography Attachment 1, Figure 2a Fort Lupton Resource Map, NWI & NHD Resources Attachment 1, Figure 2b Fort Lupton Resource Map, Hydric Soils and FEMA Floodplain Attachment 1, Figure 3 Avoidance Area Attachment 2 - Wetland Data Sheets Attachment 3 - Ordinary High Water Mark Data Sheet - KML File with GPS Points to Demarcate Work Versus No Work Areas. D:\273326\Asphalt Specialities\Letter Opinion\opinion letter final draft r2.wpd 5 ATTACHMENT 1 - FIGURES Attachment 1, Figure la Site Location Map Attachment 1, Figure lb Site Location Map - USGS Topography Attachment 1, Figure 2a Fort Lupton Resource Map, NWI & NHD Resources Attachment 1, Figure 2b Fort Lupton Resource Map, Hydric Soils and FEMA Floodplain Attachment 1, Figure 3 Avoidance Area 1/ Longmont, CO Detail Map Lon MO CO Area cf Dac O Fort Lupton, Dac n , CO ,-Colorado Cf hetrLoui Brigh-tri) CO L1 fay e'— Louisville, r-ightor C (-_Denver--Aurora, Denver=aurora, CO i 104°4'40"W a 104°4'30"W - I I Upper Left: 104-49'48" W o 1}0°4'1-"N rJ z - 0 — v 0 L 0 104°4'20"W 104°4'10" r I ----mot I � O0 Project AOI I( Fort Lupton 27 Powars 104°i49'W 104°4'50"W 104°4'4d9V z 0 0 z r r z 0 - 0 104°440"IN I I11 I I I I I I I I Project AOI 27 0 104°4'30"W 104°4'20"W 0 500 1,000 I I I I I I I I I Feet 1 inch = 1000 feet Attachment 1, Figure 1 Site Location Map 104°4 '101"W Lower Right: 10;4°48'34"W 40°3;25"N z 0 M 0 - O r v° M I I I ;Om 0 I I I --c) I I I ar 104°49'W 104°4'50"W 104°4'40"W "; Ft. Lupton Area Asphalt Specialties Path: E:\Asphalt Specialties\Asphalt Specialties.aprx geosJ/ 1797 Trek Trail, Reno, NV 89521 Figure la CarigMdrit,*(..O _ Z Longmont, CO �rn Detail Map Area Dacon—o, O WELD Dac no, CO COUNTY Lafayette -Louisville, CO e ver--A Bright ort Lipton, orado CO n rora, CO Ig atop; c0 ADAMS TY Weld County Project AOI F . it L'+I t,..i Upper! Left: 104°49'35"W 0°4'21"N 104°49'15"W Project AOI 104°49'30"W 0 500 1,000 l l l l l l l I I Feet 1 inch = 2000 feet Attachment 1, Figure 1 Site Location Map 'Lower Right: 104b48'34"W 40°3'39"� 104°49'W 1Pa°ast as" ni Ft. Lupton Area L--= geos J/ Asphalt Specialties Path: E:\Asphalt Specialties\Asphalt Specialties.aprx 1797 Trek Trail, Reno, NV 89521 Figure lb Upper Left: 104°49'48"W 40°4'30"N p 4 t 2 • • 4sb - 1,200 Feet I 1797 Trek Trail, Reno, NV 89521 Spatial Reference GCS WGS 1984 104°49'30"W Project Area 104°49'30"W Fort Lupton Resource Map Figure 2a Asphalt Specialties Prepared 03/25/24 104°49'W , Source: Esri, Maxar, nd the GIS User Community, ontributors, City of Fort eetMap, Microsoft, Esri, raph, GeoTechnologies, Inc, Legend CO Wetlands ▪ NHD Waterbody NHD Flowline Freshwater Emergent Wetland Freshwater Forested/Shrub Wetland Freshwater Pond Riverine Lower Right: 104°48'54"W 40°3'13"N 104°49'W NHD Waterbody NHD Flowline PROJECT_AOI Q Project Area Boundary z M V ° O cr Path: E:\Asphalt Specialties\Asphalt Specialties.aprx Fort Lupton Resource Map Figure 2b Hydric Soils and FEMA Floodplain Asphalt Specialties Prepared 03/25/24 i, USDA FSA, Source: Esri, Maxar, _ographics, and the GIS User Communi nity Maps Contributors, City of Fort © OpenStreetMap, Microsoft, Esri, ;armin, SafeGraph, GeoTechnologies, I Legend 7Z 100 Year Flood Plane Project Area Boundary Altvan loam, 0 to 1 percent slopes Aquolls and Aquents, gravelly substratum Water 104°49'30"W 104°49'W v-- Upper Left: 104°49'56"W - - III - 414 ... rE1 s ....L• Pin ':r;r:* mai .- - :Park Pond ` .wyl ..... VIM i - . f Kahi . ',I lit" k ii- ". 4r6 +. 1. �1 i it if 1, +o) YLone I'' .+►. •' J- Pine ark .-- A . a 41 oar I • {rt ' • t • P .00 � rte* .. L . one � ,;�' -Rine -St a _ # t + •tif a- V. c `# x-'.17 — rt w +��.� # ' 1.r — o • Avoidance Areas - ► i �i� Y� ai LL� #°hqr L.f'4 116 i �1- . - - a 4 �` ° '' • Q ♦ o u Corps Jurisdiction Area Freshwater Pond - No Entry I r W o QJ ,'• •�, "r a ,j,1 � e .. ' NO�WOT S , •• fo'�und / Work w"• Ara r JAiiip +y d s i# •lj ` - .. ` • • or f` - ; ,� r Illik I. Project Area *4 , i SDA FSA, Source: Esri, Maxar aphics, and the GIS User Co unity, ' ii I Maps Contributors, City of �I; OpenStreetMap, Microsoft, E i, di,i i in, SafeGraph, GeoTechnolo s, Inc, — ' I I"- kb, X 0 • . —.411i . \ --„,, 0 600 1,200 Feet I 1 1 1 I 1 1 I g- , � II Lower Right 1 Inch = 600 Feet ; glir Plat _ � " \). t�RiL r 104°48'46"W i 40°3'13"N g e e s UAS 1797 Trek Trail, Reno, NV 89521 Spatial Reference WGS 1984 UTM Zone 13N 104°49'30"W Avoidance Asphalt Prepared Areas Figure 3 Specialties 05/10/24 104°49'W Legend Freshwater Emergent Freshwater Forested/Shrub Freshwater Pond Riverine = Project Area Boundary Avoidance Areas 1® Land Avoidance Area Q Corps Jurisdiction Wetland Wetland Avoidance Areas Path: F:\Asphalt Specialties\Asphalt Specialties.aprx ATTACHMENT 2 - WETLAND DATA SHEETS D:A273326\Asphalt Specialities\Letter Opinion\att box.wpd 2 Prdjebt/Site: Applicant/Owner: Investigator(s): _ Landform (hillslope, terrace etc.: 6 7 LW`'reellief Subregion (LRR): a a' lap Unit Name: Pt"q U O I 1 f climatic i hydrologic conditions on the site typical ftr tllas tilde of year? Yes r No (If no, explain in Remarks) Are Vegetation , Soil , or Hydrology significantly disturbed? j j,1A Are 'Normal Circumstances' present? Yes _ Are Vegetation Soil , or Hydrology naturally problematic? j. -(if needed, explain any answers in Remarks.) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc. WETLAND DETERMINATION DATA FORM — Great Plains Region i C_ City/County ll t/ e, t Section, Township, Range: ve._ ctntve State: Sampling Date: Sampling Point r f NWI classification: No Hydrophytic Vegetation Present? Yes I-typric Soil Present? Yes Wetland Hydrology Present? Yes Is the Sampled Area within a Wetland? Yes No N — Use scientific names of ptants. No No No 1,7 Tree Stratum (Plot size: ) Absolute Dominant Indicator % Cover S 'es?' Status Dominance Test worksheet• of Dominant Species That Are©BL.FACW, orFAC (excluding FAC-): (A) it 2 3: 41 S , t€ ( 1i) 1 j '_ __ tdT Total Number of Dominant Species Across All Strata: (B) Percent of Dominant Species That Are OBL, FACW, or FAC: (R) Shrub Stratum (Plot size: ) = Total Cover 1 5; Herb , '4Prevalent a Index worksheets Total % Cover of: Multiply by: Ck L)t t /© CBL species x 1 = O t FACW species x 2 = -CD 1 FAC species i x3= 3c Stratum (Plot size: ) = Total Cover FACU species x 4 = O UPL species x 5 = 1 2; 4 6f 7; 8r 9� 1C1. -y Column Totals: (A) (B) r W� l l' 'J s , t 11 JPrevalence _E CI Index = BtA = I Hydrophytic Vegetation Indicators: _ 1 - Rapid Test for Hydrophytic Vegetation 2 - Dominance Test is >50% _ 3 - Prevalence index is. 53.0' _ 4 - Morphological Adaptations' (Provide supporting data in Remarks or on a separate sheet) Problematic Hydrophytic Vegetation' (Explain) 'Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic. Woody Vine Stratum (Plot size: ) Total Cover 1 2. Hydrophytic Vegetation Present? Yes $' ` No o Bare Grout d in Herb Stratum Total Cover Remarks: ( � 1 �1 C2-` aOA 6`'',. d (t fareo4 Dl,inc — cinn 9 n US':Army Corps of Engineers Sampling Point: OLJLI_ ',-', f I/ , I Cr i , ,. 4 ^...' N... , f t Profile Description; (Describe to the depth needed to document the indicator or confirm the Depth Matrix Redox Features absence of indicators.) Texture Remarks (inches) Color (moist) % Color °/0 Type' Loc2 (moist) (6 ID E (O Yyo- . e too v ! /1 30 g y _ (DO 1 _ AA t r. '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 (Al) _ Sandy Gleyed Matrix (S4) _ 1 cm Muck (A9) (LRR I, J) Histic Epipedon (A2) _ Sandy Redox (S5) _ Coast Prairie Redox (A16) (LRR F, G, H) Black Histic (A3) _ Stripped Matrix (S6) _ Dark Surface (S7) (LRR G) Hydrogen Sulfide (A4) _ Loamy Mucky Mineral (F1) _ High Plains Depressions (F16) Stratified Layers (A5) (LRR F) _ Loamy Gleyed Matrix (F2) (LRR H outside of MLRA 72 & 73) 1 cm Muck (A9) (LRR F, G, H) Depleted Matrix (F3) ! Reduced Vertic (F18) Depleted Below Dark Surface (All) _ Redox Dark Surface (F6) _ Red Parent Material (TF2) Thick Dark Surface (Al2) _ Depleted Dark Surface (F7) — Very Shallow Dark Surface (TF12) Sandy Mucky Mineral (S1) _ Redox Depressions (F8) _ Other (Explain in Remarks) 2.5 cm Mucky Peat or Peat (S2) (LRR G, H) High Plains Depressions (F16) 3lndicators of hydrophytic vegetation and 5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) wetland hydrology must be present, unless disturbed or problematic. Restrictive Layer (if present): Type: Hydric Soil Present? Yes No ` Depth (inches): Remarks: Wetland Hydrology Indicators: Primary Indicators (minimum of one required; check all that apply) Secondary Indicators (minimum of two required) Surface Water (Al) i _ Salt Crust (911) _ High Water Table (A2) _ Aquatic Invertebrates (B13) _ Saturation (A3) _ Hydrogen Sulfide Odor (C1) _ Water Marks (B1) _ Dry -Season Water Table (C2) Sediment Deposits (B2) _ Oxidized Rhizospheres on Living Roots (C3) _ Drift Deposits (B3) (where not tilled) _ Algal Mat or Crust (B4) _ Presence of Reduced Iron (C4) _ Iron Deposits (B5) _ Thin Muck Surface (C7) _ Inundation Visible on Aerial Imagery (B7) _ Other (Explain in Remarks) Water -Stained Leaves (B9) _ Surface Soil Cracks (B6) _ Sparsely Vegetated Concave Surface (B8) _ Drainage Patterns (B10) _ Oxidized Rhizospheres on Living Roots (C3) (where tilled) _ Crayfish Burrows (C8) _ Saturation Visible on Aerial Imagery (C9) _ Geomorphic Position (D2) _ FAC-Neutral Test (D5) _ Frost -Heave Hummocks (D7) (LRR F) Field Observations: Surface Water Present? Yes No Depth (inches): Wetland Hydrology Vf Present? Yes No Water Table Present? Yes No / Depth (inches): Saturation Present? Yes No V Depth (inches): (includes capillary fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: ) Y 4 z 1/4,./^ US Army Corps of Engineers Great Plains — Version 2.0 Prdject/Site: Vv! Applcant/©wner: lnvestigator(s): l r o e ,1/01L -Cat r�elii�eff�(concave,{convex, non(e): �C 4 `( 4L c.160 31''t`ri 1(1\1 Loo + qq' a rill( tfv Datum : NWI classification: f WETLAND DETERMINATION DATA FORM — Great Plains Region City/County: etc., Larndform (hills) p , terrace, t Subregion (LRR}' fV p Unit Name: Sampling Date: State: CO Sampling Point, Section, Township, Range: Are climatic I hydrologic conditions on the site typical for this time of year? Yes No (If no, explain in Remarks.) / Are Vegetation , Soil , or Hydrology significantly disturbed? Are "Normal Circumstances present? Yes No Are Vegetation , Soil , or Hydrology naturally problematic? (tf needed, explain any answers in Remarks.) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Hydric Soil Present? Wetland Hydrology Present? marks: Yes No Yes No No Yes the Sampled Area ithin a Wetland? Yes No VEGETATION — Use scientific names of plants. Ttee Stratum (Plot size: Absolute Dominant tndicatc % Cover Species? Status Sapling/Shrub Stratum (Plot siz4 N 2, 4 = Total Cover Do i €once Test worksheet: Number of Dominant Species That Are OBL, FACW, or FAC (excluding FAC-): (A) Total Number of D ant Species Across trafa: (B) P minant Species Etta ©BL, FACW, or FAC: (Plot size: - Total Cover 41 5 61 7l Vine Stratum (Plot size: 2. % Bare Ground in Herb Stratum Remarks: = Total Cover = Total Cover Pre Index worksheet: Total % Cover of: Multiply bv: OBL species x 1 = FACW species x 2 = FAC species x 3 = FACU species x 4 = UPL species x 5 =- Column Totals: (A) (B) Prevalence Index = B/A = rphytrc Vegetation Indicators: - Rat�id Test for Hydrophytic Vegetation _ 2 -Dr 3- Pre _ 4 - Morphologi data in Rema e Test is >50% ex is saki' Adaptations' (Provide supportin on a separate sheet) Problematic Hydrophytic Vegetation' (Explain) Hydrophytic Vegetation Present? ii and wetland hydrology must US, Army Corps of Engineers Great Plains — Version 2.0 Sampling Point: JVIV Profile Description: (Describe to the depth needed to document the indicator or confirm the Depth Matrix Redox Features absence of indicators.) Texture Remarks inches Color (moist) % Color (moist) 6/0 Type' Loc2 \ C O #� t, ,. \lK. 1 '. P '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) _ Coast Prairie Redox (A16) (LRR F, G, H) Black Histic (A3) _ Stripped Matrix (S6) _ Dark Surface (S7) (LRR G) Hydrogen Sulfide (A4) _ Loamy Mucky Mineral (F1) High Plains Depressions (F16) Stratified Layers (A5) (LRR F) _ Loamy Gleyed Matrix (F2) (LRR H outside of MLRA 72 & 73) 1 cm Muck (A9) (LRR F, G, H) _ Depleted Matrix (F3) Reduced Vertic (F18) Depleted Below Dark Surface (A11) _ Redox Dark Surface (F6) _ Red Parent Material (TF2) Thick Dark Surface (Al2) _ Depleted Dark Surface (F7) _ Very Shallow Dark Surface (TF12) Sandy Mucky Mineral (S1) _ Redox Depressions (F8) _ Other (Explain in Remarks) 2.5 cm Mucky Peat or Peat (S2) (LRR G, H) _ High Plains Depressions (F16) 3lndicators of hydrophytic vegetation and 5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) wetland hydrology must be present, unless disturbed or problematic. Restrictive Layer (if present): Type: Hydric Soil Present? Yes No / Depth (inches): Remarks: Wetland Hydrology Indicators: Primary Indicators (minimum of one required; check all that apply) Secondary Indicators (minimum of two required) _ Surface Soil Cracks (B6) _ Sparsely Vegetated Concave Surface (B8) _ Drainage Patterns (B10) _ Oxidized Rhizospheres on Living Roots (C3) (where tilled) _ Crayfish Burrows (C8) _ Saturation Visible on Aerial Imagery (C9) _ Geomorphic Position (D2) _ FAC-Neutral Test (D5) _ Frost -Heave Hummocks (D7) (LRR F) _ Surface Water (Al) _ Salt Crust (B11) _ High Water Table (A2) _ Aquatic Invertebrates (B13) Saturation (A3) _ Hydrogen Sulfide Odor (C1) _ Water Marks (B1) _ Dry -Season Water Table (C2) _ Sediment Deposits (B2) _ Oxidized Rhizospheres on Living Roots (C3) _ Drift Deposits (B3) (where not tilled) _ Algal Mat or Crust (B4) _ Presence of Reduced Iron (C4) _ Iron Deposits (B5) _ Thin Muck Surface (C7) _ Inundation Visible on Aerial Imagery (B7) _ Other (Explain in Remarks) Water -Stained Leaves (B9) Field Observations: Surface Water Present? Yes No Depth (inches): Wetland Hydrology Present? Yes No Water Table Present? Yes No Depth (inches): Yes No Depth (inches): Saturation Present? (includes capillary fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks:V b, , US Army Corps of Engineers Great Plains — Version 2.0 Soil Pit #1 and #2 Soil Pit #1 Soil Pit #2 ATTACHMENT 3 - ORDINARY HIGH WATER MARK DATA SHEET See KMZ-KML File on email or disk D:A273326\Asphalt Specialities\Letter Opinion\att box.wpd 3 Print Form E-mail U.S. Army Corps of Engineers (USAGE) RAPID ORDINARY HIGH WATER MARK (OHWM) FIELD IDENTIFICATION DATA SHEET The proponent agency is Headquarters USACE CECW-CO-R. Project ID #: ation (lat?long): Site Name: CC D '. nvestigator(s). I OMB Control No. 0710-XXXX 1 Approval Expires: `` Date and Time: 3 Step 1 Site overview from remote and online resources Check boxes for online resources used to evaluate site: 1I ! gage data � LiDAR ` geologic maps/ ( Fclimatic data Fi7i satellite imagery [land use maps serial photos Piopographic maps ROther li r ; Describe land use and flow conditions from online resources. Were there any recent extreme events (floods r drought)? 1`lc�rr> ,cz t MtY� " c C a, i is WO(it to") )1 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. 1 i Ye r Ly.c ,�� g b 3r 0 V 'rte. 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 Break in slope: nthe bank: undercut bank: valley bottom: Other: Shelving: shelf at top of bank: natural levee: man-made berms or levees: other berms: Channel bar: shelving (berms) on bar: unvegetated: I vegetation transition (go to veg. indicators) sediment transition (go to sed. indicators) upper limit of deposition on bar: Instream bedforms and other bedload transport evidence: deposition bedload indicators (e.g., imbricated clasts, gravel sheets, etc) bedforms (e.g., poofs, riffles, steps, etc.): erosional bedload indicators (e.g., obstacle marks, scourr, smoothing, etc.) Secondary channels: l i Soil development: DChanges in character of soil: Li IVludcraclrs: ( Changes in particle -sized I distribution: i transition from to Li LI LI 17 Weathered ciasts or bedrock: Wracking/presence of organic litter: Presence of large wood: Leaf litter disturbed or washed away: Water staining: upper limit of sand -sized particles Other observed indicators? I I silt deposits: Vegetation Indicators El L Change in vegetation type and/or density: Check the appropriate boxes and select the general vegetation change (e.g., graminoids to woody shrubs). Describe the vegetation transition looking from the middle of the channel, up the banks, and into the floodplain. vegetation absent to: moss to: forbs to: graminoids to: woody shrubs to: deciduous trees to: coniferous trees to: rIj Vegetation matted down I and/or bent: FiExposed roots below i intact soil la er: Describe: 1ecre c CU J . ncll ep 4 is additional information needed to support this determination? Yes No If yes, describe and attach information to datasheet: ENG FORM 6250, AUG 2021 PREVIOUS EDITIONS ARE OBSOLETE. Page 1 of 4 Save As E- i roject ID #: t Y i 2 I i of ,: t I Po i e.c ' LIG .3 tr/ `V Step 5 rati to for iocation of QH W M Additional observations or gates Y• ,,e3ci AD g A tact! a hot€ of th Photo log attached? [es e%! € 4 g th separately. [] lea II no, explain why not: -C--- P hs and include descriptions in . ' ti r!lher photographs in the order that they are taken. Attach photographs and include annotations of features. Photo Number tiev pitail jg 3Y yy 'f a r rt Y- ''6 't. Y l 5f w.r i.J„'F c $ Q' ��"t Co t 2 Page 2 of EXHIBIT K CLIMATE INFORMATION The Marcovich Mining Resource is located southeast of Fort Lupton, Colorado at an elevation of approximately 4890 feet. The area is classified as a cold semi -arid climate (BSk) under the Koppen Climate Classification system. This climate type is typically characterized as dry and moderate with cool, wetter winters and warm, dryer summers. Table K-1 shows a summary of the climate for this area based on records from 1980-2016. Table K-1 Climate Data of Fort Lupton, Colorado' Average Temperature (F) Average Precipitation (in) Maximum Minimum Total precip. Total snow January 43 20 0.5 2.1 February 47 23 0.4 2.3 March 56 29 0.9 2.7 April 63 36 1.3 1.6 May 82 45 2.4 0.2 June 83 54 1.7 0.0 July 88 59 1.3 0.0 August 86 57 1.2 0.0 September 78 48 1.2 0.2 October 65 37 0.8 1.3 November 52 27 0.5 2.5 December 42 20 0.3 2.6 Yearly (avg) 65.4 37.9 12.4 15.5 4 https://weatherspark.com/y/3746/Average-Weather-in-Fort-Lupton-Colorado-United-States-Year-Round Marcovich Gravel Pit November 2024 K-1 © Lewicki & Associates EXHIBIT L RECLAMATION COSTS The worst -case reclamation scenario will occur at the beginning of mining due to the cost of the slurry wall. Inlet and outlet structures are included in this estimate, but do not need to be constructed immediately. Before mining progresses within the 300 -foot offset, the structures will be installed. In addition to the slurry wall cost, the highwall will be dozed to a 1.5H:1V slope and then backfilled with material to a 3H:1V slope. Sufficient material stockpiles will remain onsite until the final backfilling is complete. For worst case bonding, it has been assumed that 1000 feet of highwall will require backfill and other reclamation work. After final grading is complete, stockpiled topsoil will be placed at a thickness of one foot. The topsoiled areas will then be seeded based on the permitted seed plan. A breakdown of the estimated worst -case reclamation cost is shown in Table L-1. Once the slurry wall is installed, the permittee may pursue a reduced bond via a bond reduction request to CDRMS. The slurry wall unit cost is based on previous CDRMS slurry wall cost calculations for other similar sites. Marcovich Gravel Pit November 2024 L-1 © Lewicki & Associates Table L-1 Marcovich Mining Resource Bond Estimate. Description Construct slurry wall. 4750 -ft by 50 -ft deep. Material Quantity 237,500 Unit Sq. ft. Unit Cost $4.30 Cost $1,021,250 Inflow / outflow structures including excavation, riprap, concrete, and vegetation. 1 each $35,000 $35,000 Topsoiling to 1 FT. deep along the slurry wall installation path. 20 -ft wide x 4750 -ft long (2.2 acres) x 1 -ft deep. 3,520 CY $1.05 $3,700 1000 -ft of highwall backfilled from 1.5H:1V to 3H:1V to a depth of 25 -ft. 17,360 CY $1.05 $18,230 Topsoil areas above water level and above highwall 1 ft. deep (4 acres) 9,680 CY $1.05 $10,160 Scarify topsoiled areas prior to seeding (slurry wall installation path + highwall and surroundings) 6.2 acres $150 $930 Seeding of topsoiled areas. 6.2 acres $400 $2,480 Mulching of topsoiled areas. 6.2 acres $500 $3,100 Weed control management for two years. 2 each $1500 $3,000 Subtotal $1,108,010 DRMS cost (28%) $310,243 Total $1,418,253 Marcovich Gravel Pit November 2024 L-2 © Lewicki & Associates EXHIBIT M OTHER PERMITS REQUIRED The following permits are necessary to operate at the Marcovich Mining Resource. Copies of all permits will be provided to the Division after they have been acquired. 1. Weld County Use Permit 2. Colorado Air Pollution Control Division Fugitive Dust Permit and Air Pollution Emission Notice (APEN) 3. Water Quality Control Commission Discharge Permit 4. Colorado Dept. of Transportation access permit (this may be covered by the existing Chavers Resource) 5. Weld County Floodplain Development permit 6. Colorado Division of Water Resources gravel well permit Marcovich Gravel Pit November 2024 M-1 © Lewicki & Associates EXHIBIT N RIGHT OF ENTRY The surface and mineral owners of the property to be mined are Jerry and Adam Marcovich. A right of entry affidavit is attached. Marcovich Gravel Pit November 2024 N-1 © Lewicki & Associates RIGHT OF WAY AGREEMENT This Right of Way Agreement (this "Agreement") is entered into on this 10th day of September, 2024, by and between Hunt Brothers Properties, Inc., ("Grantor"), whose mailing address is 345 W 62nd Ave, Denver, Colorado 80216, and Asphalt Specialties Company, Inc., a Colorado corporation, ("Grantee"), whose mailing address is 345 W 62nd Ave, Denver, Colorado 80216. In consideration of the sum of ten dollars ($10.00) and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, Grantor does hereby grant unto Grantee a non-exclusive right of way for grading, graveling, expanding, and using a dirt road for ingress and egress to adjacent properties across a strip of land approximately forty feet (40') in width (the "Right of Way"), further depicted on Exhibit "A" attached hereto and made a part hereof, and located adjacent to US Hwy 85 in part of: Township 1 North. Range 66 West, 6th P.M. Section 18: N/2 Weld County, Colorado This Agreement is made subject to the following terms and conditions: 1. Grantee shall pay Grantor one dollar ($1.00) per year (each an "Annual Payment") for a ten (10) year term ("Term"). The first Annual Payment shall be made within upon execution of this Agreement ("Anniversary Date"). Each subsequent Annual Payment shall be made on each annual Anniversary Date during the term of this Agreement. This Agreement shall terminate upon failure to timely pay the Annual Payment for the subsequent year or at the expiration of the Term, i.e., on September 11, 2034 ("Expiration Date"). Should Grantee timely pay each Annual Payment for the duration of the Term, Grantee may extend the Term for an additional five (5) year term ("Extension Term") under the same conditions, except that the Annual Payment for the Extension Term shall be one dollar ($1.00) and notice of an intent to extend shall be given in writing at least sixty (60) days prior to the Expiration Date. The Extension Term shall terminate upon failure to timely pay for the subsequent Extension Term year or at the expiration of the Extension Term, i.e., September 11, 2039. This Agreement and privileges granted in this Agreement are assignable in whole or in part by Grantee only upon written consent from Grantor, which shall not be unreasonably withheld and may be withheld if the proposed assignee cannot demonstrate and verify the ability to adhere to the terms of this Agreement. 2. EXECUTED as of this 10th day of September, 2024. GRANTOR: \,, {,- Hunt Brothers Properties, Inc. By: Daniel W Hunt As: President GRANTEE: Asphalt Specialties Company, Inc. By: Daniel W. Hunt President ACKNOWLEDGEMENTS STATE OF COLORADO COUNTY OF ) ) ) The foregoing instrument was acknowledged before me this 10th day of September, 2024, by Daniel W. Hunt, President, Hunt Brothers Properties, Inc., and being authorized to do so, on behalf of said company. WITNESS my hand and Official Seal. Jan Nelson NOTARY PUBLIC STATE OF COLORADO NOTARY ID 19994030527 'y COMMISSION EXPIRES May 03, 2028 STATE OF COLORADO COUNTY OF ) ) ) Notary Public in and for said State and County MY COMMISSION EXPIRES: The foregoing instrument was acknowledged before me this 10th day of September, 2024, by Daniel W. Hunt, President, Asphalt Specialties Company, Inc., a Colorado corporation, and being authorized to do so, on behalf of said company. WITNESS my hand and Official Seal. Notary Public in and for said State and County IF w Jan Nelson NOTARY PUBLIC STATE OF COLORADO NOTARY ID 19994030527 MY COMMISSION EXPIRES May 03, 2028 MY COMMISSION EXPIRES: Exhibit "A" Attached to and made a part of that certain Right of Way Agreement dated the 10th day of September, 2024 by and between Hunt Brothers Properties, Inc, as Grantor, and Asphalt Specialties Company, Inc. as Grantee. WELD COUNTY C7N1 r.fl_ \1 �tl'1'Ih�ii rte: y ,Win.. i. 558 56 1,117.1 Feet 1. EXHIBIT A - Right of Way Agreement Hunt Brothers Properties, Inc. (Grantor) Asphalt Specialties Co., Inc. (Grantee) I WGS_1984_Web Mercator Auxiliary_Sphere © Weld County Colorado '12749, 1:6,703 0 This map is a user generated static output from an Internet mapping site and is for reference only. Data layers that appear on this map may or may not be accurate, current, or otherwise reliable. THIS MAP IS NOT TO BE USED FOR NAVIGATION II U Legend Parcels Highway County Boundary Notes SECOND AMENDMENT TO THAT CERTAIN SAND AND GRAVEL LEASE BETWEEN ASPHALT SPECIALTIES CO. INC., AND JERRY D. MARCOVICH AND ADAM D. MARCOVICH This Second Amendment ("Second Amendment"), effective the day of 2024, is made to that certain Sand and Gravel Lease, dated September 8, 2023 (the "Lease"), by and between Jerry D. Marcovich and Adam D. Marcovich, (collectively "Lessor") and Asphalt Specialties Co., Inc., ("ASCI"). Defined terms in this Second Amendment have the same meaning as those in the Lease, unless indicated otherwise. RECITALS A. Exhibit A to the Lease contains a legal description as well as a map overlay of the proposed area to be mined ("Mine Area Map") on the Leased Premises. B. Lessor and ASC1 desire to amend Exhibit A to include a revised Mine Area Map that reflects a change in the area to be mined under the Lease. AGREEMENT Lessor and ASCI hereby agree to amend the Lease as follows: The Mine Area Map contained in Exhibit A to the Lease is replaced in its entirety with the revised Mine Area Map attached to this Second Amendment. IN WITNESS WHEREOF, this Second Amendment is effective as of the date first set forth above. LESSOR: j enyD. M ar ovich STATE OF ) ss. COUNTY OF The foregoing instrument was acknowledged before me this day of _ , 2022 by i �; , the Lessor identified above. WITNESS my hand and Notaries Seal Notary Public My Commission Expires: LESSOR: Adam D. Marcovich STATE OF ) ss. COUNTY OF The foregoing instrument was acknowledged before me this day of _ , the Lessor identified above. WITNESS my hand and Notaries Seal Notary Public My Commission Expires: Asphalt Specialties Co., Inc. By Asphalt Specialties Co., Inc. Daniel W. Hunt, President STATE OF COLORADO ) ss. COUNTY OF Jan Nilson NOTARY PUBUC STATE OF COLORADO NOTARY ID 19994030527 MY COMMISSION EXPIRES May 03, 2028 , 2024 by The foregoing instrument was acknowledged before me this day of , 2024 by on behalf of Asphalt Specialties Co., Inc WITNESS my hand and Notaries Seal. Notary Public My .E ommission Expires: EXHIBIT A TO THE SECOND AMENDMENT TO THAT CERTAIN SAND AND GRAVEL LEASE BETWEEN ASPHALT SPECIALTIES CO. INC., AND JERRY D. MARCOVICH AND ADAM D. MARCOVICH EFFECTIVE THE DAY OF -__ , 2024. BOUNDARIES CM60.mwB * wm.med,e.n Dean.,. *Mr n4.nx_a.. i l.Q °W '.,Lirr 'ill. "'r ` t': 1. I ,.. y v I $oundary Map Mareovich Pkt M. Yaw Yw.MM M Milt I 1 71 Exhibit A. Marcovich Mine Area Map. t.:'• Revised , 2024 • TF Lce;c6; N A.mi,;att. 4613672 -ages: 1 of 1 07/28/2020 ,1,27:2 P11 R Fee :813.00 D Fae.:40.00 Carly Koppes,-CTerk and Recorder, Weld CoGnt'y', c0 liii I �� fi '� h��4i'K+'rV«4w« "fiII W 111 111 The printed portions of this f ;' except differentiated additionsfi ve been approved by the Colors iRea1 Estate Commission. (D4-10-19) (Mandatory 1-W) QUIT CLAIM DEED Amy Francis Marcovich (Grantor(s)); whose street address is 1025 S. Denver Avenue, City -or. Town of Fort Luptotl , County of Weld and',State of Colorado , for thi :consideration of Ten & ilo%100ths dollars, e0.00), in hand paid, here b 'sell(s) and quitclaim(s) tole* D. Marcovich (Grantee)) as ❑ joint tenants, tenants in common, [f , whose st eet address is 1025 S. Den sr Avenue, City or Town of Fort Lupton, County. nt Weld and State of ColOrtido, the following real prOp_erty in the County of Weld' and State of Colorado, except reserving all oiLand gas mineral interest nd the right to use so mush ofs. the surface ails necessary to develop, plrjiduce and care for the st%riie, to wit: 15819 PT S2 7 1 66 BEG NODT2'W 1097' OF S4 COR S 'N89D25'E 208.03' TO. WLY R/W HWYY 85 N03D48'E 1533.021 TO E -W C/L SEC S89D02,'W 315.34' S89D02'W 13J488' S0D10'E 1517.87' N89D25'E 1317,3' TO BEG (3R) Section: 7 Townsti*. 1N Range: 66W J J also knownasAssessor's Parcel Number: 147107000015 also lolown as: 4125 Highway -8 Street Address -with all its appurtenances roperty). Signed this '7 day of Z GRANTOR(S): STATE OF CO: ORADO COUNTY=)F ) ss. Fort LuRton City ,2020. Colorado 80621 State - Zip The foregoing instrument was,cimowledged before me this Witness my hand and vial seal. My commission giores: C Z( I Z �' Z �- DAWN KOSHIO NOTARY PUBUC -STATE OF COLORADO NOTARY ID 20104038580 , My Commission Expires September 21, 2022 D4-10-19. QUIT CLAIM DODS, day of ,20�, RIGHT OF WAY AGREEMENT Final 3.7.2023 Parcel # 147118000066 STATE OF COLORADO COUNTY OF WELD This Right of Way Agreement (this "Agreement") is entered into on this 10 day of March, 2023, by and between Ken Ogilvie Living Trust, dated September 13, 2018, ("Grantor"), whose mailing address is 4620 US Highway 85, Fort Lupton, Colorado 80621 and Asphalt Specialties Company, Inc., a Colorado corporation, ("Grantee"), having a mailing address of 10100 Dallas Street, Henderson, Colorado 80640, collectively referred to herein as "Parties". In consideration of the sum of ten dollars ($10.00) and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, Grantor does hereby grant unto Grantee a non-exclusive right of way for grading, graveling, expanding, and using a dirt road for ingress and egress to adjacent properties across a strip of land forty feet (40') in width (the "Right of Way"), further depicted on Exhibit "A" attached hereto and made a part hereof and located adjacent to US Hwy 85 in part of: Township 1 North, Range 66 West 6°1 P.M. Section 18: N12 Weld County, Colorado This Agreement is made subject to the following terms and conditions: 1. Grantee shall pay Grantor per year (each an "Annual Payment") for a ten (10) year term ("Term"). The first Annual Payment shall be made within 30 days after Grantee has obtained all required Government Authorizations described in Paragraph 2 below ("Anniversary Date"). Each subsequent Annual Payment shall be made on each annual Anniversary Date during the term of this Agreement. This Agreement shall terminate upon failure to timely pay the Annual Payment for the subsequent year or at the expiration of the Term, i.e., on {Ma•r4 10 , 2033 ("Expiration Date"). Should Grantee timely pay each Annual Payment for the duration of the Term, Grantee may extend the Term for an additional five (5) year term ("Extension Term") under the same conditions, except that the Annual Payment for the Extension Term shall be and notice of an intent to extend shall be given in writing at least sixty (60) days prior to the Expiration Date. The Extension Term shall terminate upon failure to timely pay for the subsequent Extension Term year or at the expiration of the Extension Term, i.e., J e crck /0 , 203P. 2. Grantor acknowledges that Grantee must first obtain certain approvals for zoning, permits, and other authorizations from federal, state, and local governments or private entities, prior to starting operations on properties adjacent to the Right of Way and using the Right of Way ("Government Authorizations"). Grantee shall be responsible for obtaining such Government Authorizations. Grantor agrees to cooperate and to join Grantee in applying for, obtaining and maintaining such Government Authorizations as they pertain to the Right of Way, but this shall not be construed to financially obligate Grantor for the expenses associated with obtaining the Government Authorizations, which expenses shall be borne solely by Grantee. Grantee shall have twelve months to obtain the Government Authorizations and shall pay Grantor - to paid at the date of signing this Agreement in exchange (the "Deposit"). Should Grantee require additional time after the initial twelve months to obtain Government Authorizations, Grantee shall be granted an additional six months upon payment of an additional_ to Grantor (the "Authorization Extension Fee"). Grantee shall provide written notice to Grantor immediately upon receipt of all Governmental Authorization and prior to access upon the Right of Way. The Deposit and any Authorization Extension Fee paid by Grantee shall be applied against the first Annual Payment due Grantor under Paragraph 1 above. 3. Grantee agrees not to construct anything within the Right of Way, except that Grantee shall construct gates where it enters and exits Grantor's property and a four wire barbed fence along the western boundary of the Right of Way to contain livestock and may expand, grade, and/or gravel the existing dirt road and take such other actions necessary to ensure its safe, adequate and prudent use for travel by trucks. Grantee shall be solely responsible for maintaining the dirt road within the Right of Way. 4. Grantor agrees not to construct anything within the Right of Way that could interfere with Grantee's rights granted hereunder, and Grantee agrees not to impede Grantor's use of the Right of Way unless such use such use interferes with Grantee's rights granted hereunder. 5. Grantee has no rights to use Grantor's property outside of the Right of Way and use of the Right of Way shall be limited to those uses specifically identified herein. Construction within the Right -of -Way for the fence and other uses identified herein shall occur only during normal business hours. 6. Grantee agrees to comply with all applicable federal, state, and local laws, regulations, orders and rules related to the use of the Right of Way and the exercise of Grantee's rights hereunder. 7. Grantee agrees to protect, indemnify, and hold harmless Grantor from any claims, demands, expenses, losses, damages, or injuries (including death) to persons or property to the extent caused by Grantee or Grantee's employees, and/or authorized agents, affiliates, or any other third party working on behalf of Grantee (collectively, "Grantee's Representatives") in connection with Grantee's or Grantee's Representatives' use of the Right of Way, and specifically to protect, indemnify, and hold harmless Grantor from any failure of Grantee or Grantee's Representative to obtain requisite permits or any use by Grantee that violates federal, state, or local regulation, order, rule, or law irrespective of whether such use is permitted herein. 8. Grantee shall have the right to discharge or redeem for Grantor, in whole or in part, any mortgage, tax or other lien that covers, in whole or in part, the Right -of -Way and shall be subrogated to such lien and rights. 9. This Agreement and privileges granted in this Agreement are assignable in whole or in part by Grantee only upon written consent from Grantor, which shall not be unreasonably withheld and may be withheld if the proposed assignee cannot demonstrate and verify the ability to adhere to the terms of this Agreement. 10. All notices must be in writing and must be delivered to the above addresses and to the following email addresses: To Grantor: To Grantee: pegasusk3@gmail.corn and emily.g.sheridan@gmail.com dan@asphaltspecialties.com in order to be effective unless changed by either party through prior written notice to the other. All payments made to Grantor pursuant to the terms of this Agreement will be made by Grantee by cashier's check, payable to Grantor at the above address. This payment arrangement may be modified by Grantor upon written notice to Grantee at least sixty (60) days prior to the due date of the next payment. 11. Prior to entry upon the Right of Way, Grantee shall deposit IIDas escrow ("Escrow Payment") with a mutually agreed upon escrow agent, to be held for the duration of this agreement, including the Extension Term if applicable. The Escrow Payment shall be returned to Grantee upon remediation of the Right of Way within sixty (60) days of the expiration of this agreement as contemplated in Section 1 to substantially the same condition as it existed prior to Grantee's entry thereon, or in Grantor's sole discretion . Should Grantee fail to remediate the Right of Way to substantially the same condition as it existed prior to Grantee's entry thereon within sixty (60) days of expiration of this agreement, the entirety of the Escrow Payment shall be released to Grantor. 12. Grantee shall extend all culverts running under US Hwy 85 as they currently exist as shown on Exhibit A to avoid interfering with the drainage of water through the culverts. 13. The Right of Way is granted AS IS WHERE IS, with no representation or warranties made by Grantor related thereto. Grantee is solely responsible for identifying and complying with any existing easements or other burdens within the Right of Way. 14. If any provision or any portion of any provision of this Agreement is held by a court of competent jurisdiction to be invalid or unenforceable by reason of any law or public policy, such provision or portion thereof will be considered to be deleted, and the remainder of this Agreement will constitute the agreement between Grantor and Grantee covering the subject matter hereof. [Remainder of Page Intentionally Left Blank] EXECUTED as of this (0 day of h <r 2023. GRANTOR: Ken Ogilvie Living t, ated September 13, 2018 By: Ken Ogivlie As: Trustee GRANTEE: Asphalt Specialties Company, Inc. By: Daniel W. Hunt President STATE OF COLORADO COUNTY OFV� ACKNOWLEDGEMENTS ) ) ) 04S4 The foregoing instrument was acknowledged before me this l O day of Match , 2023, by Ken Ogilvie, as Trustee for the Ken Ogilvie Living Trust, dated September 13, 2018, and being authorized to do so, on behalf of said trust. WITNESS my hand and Official Seal. ANTONIO DIAZ NOTARY PUBLIC STATE OF COLORADO NOTARY ID 20224825565 • MY COMMISSION EXPIRES 06/30/2026 STATE OF COLORADO COUNTY OF A ,k a 14 s ) ) ) Notary Pul is in and for said State and County MY COMMISSION EXPIRES: 00730/202 r,) The foregoing instrument was acknowledged before me this ' day of /V1 aim , 2023, by ran 1 W. guurr, as r,2-es:cievr. for Asphalt Specialties Company, Inc., a Colorado corporation, and being authorized to do so, on behalf of said company. WITNESS my hand and Official Seal. JAN NELSON NOTARY PUBLIC STATE OF COLORADO Mo7INRY ID 19994030527 My °om ssion Expires Aptil 29.2024 NotarcT Public in and for said State and County MY COMMISSION EXPIRES: A? , Exhibit "A" Attached tp and made a part of that certain Right of Way Agreement dated the / ° day of aro'- , 2023 by and between the Ken Ogilvie Living Trust,dated 13, 2018, as Grantor and Asphalt Specialties Company, Inc. as Grantee.September A S: qN 4J TEMPORARY RIGHT OF WAY AGREEMENT Parcel # 146107000016 DRAFT 3.1.2023 Version 2 STATE OF COLORADO COUNTY OF WELD This Temporary Right of Way Agreement (the "Agreement") is entered into on this day of 1N'. , 2023, by and between Sakata Farms Inc.., ("Grantor"), whose mailing address is PO Box 508, Brighton, Colorado 80601 and Asphalt Specialties Company, Inc., a Colorado corporation, ("Grantee"), having a mailing address of 10100 Dallas Street, Henderson, Colorado 80640, collectively referred to herein as "Parties". In consideration of the sum of ten dollars ($10.00) and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, Grantor does hereby grant unto Grantee a non-exclusive temporary right of way for grading, graveling, dust control, expanding, and using a dirt road for ingress and egress to adjacent properties across a strip of land forty feet (40') in width (the "Right of Way"), further depicted on Exhibit "A" attached hereto and made a part hereof, and located adjacent to and west of US Hwy 85 in part of: Township 1 North, Range 66 West, 6th P.M. Section 7: SE/4 Weld County, Colorado This Agreement is made subject to the following terms and conditions: 1. Grantee shall pay Grantor per year (each an "Annual Payment") for a ten (10) year term ("Term") The first Annual Payment shall be made within 30 days after Grantee has both (a) obtained all required Government Authorizations described in Paragraph 2 below, and (b) the earlier of (i) commencement of mining operations by Grantee on adjacent properties for which this Right of Way is needed, or (ii) construction of the roadway on the Right of Way by Grantee ("Anniversary Date"). Each subsequent Annual Payment shall be made on each annual Anniversary Date during the term of this Agreement. This Agreement shall terminate upon failure to timely pay the Annual Payment for the subsequent year or at the expiration of the Term.("Expiration Date"). Should Grantee timely pay each Annual Payment for the duration of the Term, Grantee may extend the Term for an additional five (5) year term ("Extension Term") under the same conditions, except that the Annual Payment for the Extension Term shall be and notice of an intent to extend shall be given in writing at least sixty (60) days prior to the Expiration Date. The Extension Term shall terminate upon failure to timely pay for any subsequent Extension Term year or at the expiration of the five year Extension Term. 2. Grantor acknowledges that Grantee must first obtain certain approvals for zoning, permits, and other authorizations from federal, state and local governments of private entities, prior to starting aggregate operations on properties adjacent to the Right of Way and using the Right of Way ("Government Authorizations"). Grantor agrees to cooperate with Grantee in applying for, obtaining and maintaining such Government Authorizations as they pertain to the Right of War, but this shall not be construed to financially obligate Grantor for the expenses associated with obtaining the Government Authorizations, which expenses shall be borne solely by Grantee. Grantee shall ensure all Government Authorizations remain valid for the duration of the Right of Way. 3. Grantee agrees not to construct anything within the Right of Way, except that Grantee shall construct a four -wire barbed fence along the western boundary of the Right of Way to contain livestock and may expand, grade, and/or gravel the existing dirt road and take such other actions necessary to control dust, ensure its safe, adequate and prudent use for travel by trucks. Grantee shall be solely responsible for maintaining the dirt road within the Right of Way. 4. Grantee shall extend all culverts running under US Hwy 85 as they currently exist or as they are constructed so as to avoid interfering with the supply of irrigation water or drainage of water. 5. Grantee's us of the Right of Way shall not interfere with Grantor's access to its adjoining property or the deliver or removal of irrigation water from that property. If Grantee's use of the Right of Way interferes with the delivery or removal of irrigation water from Grantor's adjacent property or unreasonably limits Grantor's access to its property, Grantee shall immediately remove whatever obstructions have been placed upon the property by Grantee to ensure the efficient access to the property by Grantor and the delivery and removal of irrigation water. If Grantee, its employees, invitees or licensees damage any of the culverts or other infrastructure that currently exist or are constructed within or adjoining the Right of Way, Grantee shall immediately notify Grantor of any such damage and repair or replace the damaged culvert or other infrastructure. Grantee shall be liable for any damage to Grantor's crops as a result of damage to Grantor's culverts or other infrastructure. 6. Grantor agrees not to construct anything within the Right of Way that could interfere with Grantee's rights granted hereunder, and Grantee agrees not toimpedeGrantor's use of the Right of Way unless such use interferes with Grantee's rights granted hereunder. 7. Grantee has no rights to use Grantor's property outside of the Right of Way and use of the Right of Way shall be limited to those uses specifically identified herein. Construction within the Right of Way for the fence and other uses identified herein shall occur only during normal business hours. 8. Grantee agrees to comply with all applicable federal, state, and local laws, regulations, orders and rules related to the use of the Right of Way and the exercise of Grantee's rights hereunder. 9. Grantee agrees to protect, indemnify, and hold harmless Grantor from any claims, demands, expenses, losses, damages, attorneys fees and costs, or injuries (including death) to persons or property to the extent caused by Grantee or Grantee's employees, and/or authorized agents, affiliates, or any other third party working on behalf of Grantee (collectively, "Grantee's Representatives") in connection with Grantee's or Grantee's Representatives' use of the Right of Way, and specifically to protect, indemnify, and hold harmless Grantor from any failure of Grantee or Grantee's Representative to obtain requisite permits or any use by Grantee that violates federal, state, or local regulation, order, rule, or law irrespective of whether such use is permitted herein. 10. Grantee shall have the right to discharge or redeem for Grantor, in whole or in part, any mortgage, tax or other lien that covers, in whole or in part, the Right of Way and shall be subrogated to such lien and rights. 11. This Agreement and privileges granted in this Agreement are assignable in whole or in part by Grantee only upon written consent from Grantor, which shall not be unreasonably withheld and may be withheld if the proposed assignee cannot demonstrate and verify the ability to adhere to the terms of this Agreement. 12. All notices required under this Agreement must be in writing and must be delivered to the above addresses, in order to be effective unless changed by either party through prior written notice to the other. All payments made to Grantor pursuant to this Agreement will be made by check, payable to Grantor at the above address. This payment arrangement may be modified by Grantor upon written notice to Grantee at lease sixty days prior to the due date of the next payment. 13. Prior to entry upon the Right of Way, Grantee shall deposit ten thousand dollars ($10,000.00) as escrow ("Escrow Payment") with a mutually agreed upon escrow agent, to be held for the duration of this agreement, including the Extension Term if applicable. The Escrow Payment shall be returned to Grantee upon remediation of the Right of Way within sixty (60) days of the expiration of this agreement as contemplated in Section 1 to substantially the same condition as it existed prior to Grantee's entry thereon, or in Grantor's sole discretion. Should Grantee fail to remediate the Right of Way to substantially the same condition as it existed prior to Grantee's entry thereon within sixty (60) days of expiration of this agreement, the entirety of the Escrow Payment shall be released to Grantor. 14. The Right of Way is granted AS IS WHERE IS, with no representation or warranties made by Grantor related thereto. Grantee is solely responsible for identifying and complying with any existing easements or other burdens within the Right of Way. If any provision or any portion of any provision of this Agreement is held by a court of competent jurisdiction to be invalid or unenforceable by reason of any law or public policy, such provision or portion thereof will be considered to be deleted, and the remainder of this Agreement will constitute the agreement between Grantor and Grantee covering the subject matter hereof. [Remainder of Page Intentionally Left Blank] IN WITNESS WHEREOF, this agreement is entered into as of the day and year first written above and executed in at least two original copies with one copy to the Grantor and one copy to the Grantee. GRANTO i Sakata Farms Inc. By( / "C Robert Sakata Title: GRANTEE: Asphalt Specialties Co., Inc. Asphalt Specialties Company, Inc. By: Daniel W. Hunt Title: President STATE OF COLORADO COUNTY OF ACKNOWLEDGEMENTS ) ) ) SHARON K NISHIMOTO NOTARY PUBLIC STATE OF COLORADO NOTARY ID 20074026026 MY COMMISSION EXPIRES JULY 13, 2023 The foregoing instrument was acknowledged before me this day of , 2023, by ,b , as en- -- for Sakata Land, Co. WITNESS my hand and Notaries Seal. v Notary Public in and for said State and County MY COMMISSION EXPIRES: STATE OF COLORADO COUNTY OE,e.,,� a The foregoing instrument was acknowledged before me this ^ day of `// j g/ , 2023, by Daniel W. Hunt, as President for Asphalt Specialties Company, Inc., a C7lorado corporation, and being authorized to do so, on behalf of said company. WITNESS my hand and Official Seal. PAULA E. MAES NOTARY PUBLIC STATE OF COLORADO NOTARY ID 20014037092 MY COMMISSION EXPIRES DEC.30, 2025 ) ) ) tary Public in and for said Statp-and County MY COMMISSION EXPI ES: f Gti,/'/ 72 - Exhibit "A" Attached to and made a part of this Right of Way Agreement dated the day of 2022 by and between the Sakata Land, Co, as Grantor and Asphalt Specialties Company, Inc. as Grantee. xda ese3 .•il„ ., .7a ii6••••i MOO litre i�W{ieeirU OUST••i ibd lank iYigi•i 'nq 6(0 004P!bsii TrarN purl 46**6 Kimtheal zZ0V P sflJ 1 g T 1 d -I 4 Sakata Land Co_ " Account R6189381i Parcel 147107000016 y ' Section 7 Township 1 North ; .� • Range 86 West , • ' • 1. MOHOF WAY ' ±1.160 ft x40 R I► Temporary Access and Haul Road • Rightot yy �liPrt' .iii ` • 1 EXHIBIT 0 OWNERS OF AFFECTED LAND AND MINERAL TO BE MINED The owner(s) of record of affected land (surface area) and owners of substance to be mined are Jerry and Adam Marcovich. ROW owners are Sakata Farms Inc., Ogilvie, and Hunt Brothers Properties, Inc. properties. Marcovich Gravel Pit November 2024 O-1 © Lewicki & Associates EXHIBIT P MUNICIPALITIES WITHIN TWO MILES The Marcovich Mining Resource is located immediately southeast of Fort Lupton, Colorado, a city in Weld County. Fort Lupton 130 S McKinley Avenue Fort Lupton, CO Marcovich Gravel Pit November 2024 P-1 © Lewicki & Associates EXHIBIT Q PROOF OF MAILING OF NOTICES TO THE BOARD OF COUNTY COMMISSIONERS AND SOIL CONSERVATION DISTRICT Notices were filed with the Weld County Board of Commissioners and the West Greeley Conservation District in support of this permit application. Weld County Board of Commissioners 1150 O Street P.O. Box 758 Greeley, CO 80631 Platte Valley Conservation District 57 W Bromley Lane Brighton, CO 80601 Marcovich Gravel Pit November 2024 Q-1 © Lewicki & Associates PUBLIC NOTICE Asphalt SpeCialties Co. Inc, 345 W 52nd St, Denver, Colorado 80216, (303) 289.6555, has filed an application for a Construction Materials (112c) Reclamation Permit with the Colorado Mined Land Reclamation�Actu The provisions of Colorado knownlnas Marcovich Mining Resource, and Is located at or near Section 7, Township 1 North, Range 56 West, on the 6th Prime Meridian, The proposed date of commencement is January 2025, and the proposed date of completion is June 2032. The proposed future use of the land Is tenta- tive decision date maySyebent�o�btaiinned fromal } the Division of Recla- mation, Denv, Colorado 80203,((303 865-3567, 1313 oan r at the wRoom 215, eld County Clerk & Recorder's Office, 1250 H St, Greeley, Colorado 80631 or the above -named applicantA complete copy of the application is available at the above -named County Clerk and Recorder's of- fice and at the Division's office. Comments concerning the application and exhibits must be in Writing and must be received by the Division of Reclamation, Mining, and Safety by 4:00 p.m., 20 days after the last pubiica- tlon of this notice. Commennotethat ated t enoise.truck provisions Vic, hours of op ration, seq. impacts, effects on property values and other social or eco- nomic concerns are issues not subject to this Office's jurisdic- tion. These subjects, and similar ones, are typically addressed by your focal governments, rather than the Division of Reclama- tion, Mining, and Safety or the Mined Land Reclamation Board. Published: Greeley Tribune July 24, 31, August 7, 14, 2024- 20655780 Prairie Mountain Media, LLC PUBLISHER'S AFFIDAVIT County of Weld State of Colorado The undersigned, Agent , being first duly sworn under oath, states and affirms as follows: 1. Helshe is the legal Advertising Reviewer of Prairie Mountain Media LLD, publisher of the Greeley Tribune. 2. The Greeley Tribune is a newspaper of general circulation that has been published continuously and without interruption for at least fifty-two weeks In Weld County and meets the legal requisites for a legal newspaper under Colo. Rev. Stat, 24-70-103. 3. The notice that is attached hereto is a true copy, published in the Greeley Tribune In Weld County on the following date(s): Jul 24, 31 and Aun 7. 14, 2024 Subscribed and swor o me before mtis day of Notary Public (sem.) SHAYLA NAJERA NOTARY PUBLIC STATE OF COLORADO NOTARY ID 20174031965 MY COMMISSION EXPIRES July 31, 2625 Account: Ad Number: Fee: 1064048 2065780 3238.00 1 Prairie Mountain , . 'S "` ri.:: Akron News -Reporter • Broomfield Enterprise • Brush Beet Express • Brush News -Tribune Buffington Record • Burlington Plains Deafer • Canon City Daily Record • Carton City Shopper Colorado Daily • Colorado Hometown Weekly • Daily Camera - Estes Park Trait -Gazette FrontRangeClassifieds-com • Fort Morgan Times • Fort Morgan Weekly • Greeley Tribune • GT Weekly Julesburg Advocate • Lamar Ledger • Longmont Times -Cal! • Loveland Reporter -Herald Loveland Weekly • Northern Colorado Life - South Platte Sentinel - Sterling Journal -Advocate — — PO Box 8008, Willoughby, OH 44096-8008 — — Return Service Requested ADVERTISING INVOICE AND STATEMENT 9768000272 PRESORT 269 I AB O.588101C2 vBa i 111"�11 � 11Iii 11111111�i I II I t1I i iI 111111111111111" 11111 Ii GREG LEWICKI & ASSOCIATES 3375 W POWERS CIRCLE LITTLETON CO 80123-2883 Prairie Mountain NEWSPAPER START STOP REFERENCE DESCRIPTION PLEASE DETACH AND RETURN THIS PORTION WITH YOUR REMITTANCE I BILLING DATE , BILLING PERIOD STMTIINV NUM I PAGE 08/31/2024 08/01/2024 - 08/31/2024 0000395427 1 of 1 1 fa TOTAL AMOUNT DUE $238.00 TERMS I ACCT NUM L BILLED NUM I Net15 1064948 1064948 .12tr38s Send payment to: PRAIRIE MOUNTAIN MEDIA PO BOX 8008 WILLOUGHBY, OH 44096.8008 IIi1111i��f1�.�11'111'I111!loth IMil Ito Id1III 1Ito111i111111111 Fed ID: 74.3161521 UNAPPLIED AMOUNTS ARE INCLUDED IN TOTAL AMOUNT DUE PRODUCT Balance Forward 07/24 08/14 102065780-07242024 PUBLIC NOTICE Asphalt Specialties Greeley Tribune Online Co. Inc, 345 W 62nd St, Denver, PREVIOUS AMOUNT OWED: NEW CHARGES THIS PERIOD: PAYMENTS THIS PERIOD: DEBIT ADJUSTMENTS THIS PERIOD: CRE FTADJUSTMENTS THIS PERIOD: $0.00 $238.00 $0.00 $0.00 $0.00 We appreciate your business. Thank You. INVOICE AND STATEMENT OF ACCOUNT CURRENT NET AMOUNT I $238.00 30 DAYS $0.00 BO DAYS $0.00 r ETATEMENTANVDICE NUMBER I BILLING PERIOD I ADV NUMBER J 000O395427 08/01/2024 - 08/31/2024 1064948 BILLED TIMES SAU SIZE UNITS RUN RATE AMOUNT $0.00 2.00 x 35 Li 70 8 $238.00 t.12b-255 OVER 90 DAYS I • UNAPPLIED AMOUNT I TOTAL AMOUNT DUE I $0.00 $0.00 $238.00 ADVERTISERICLIENT NAME GREG LEWICKI & ASSOCIATES MAKE CHECKS PAYABLE TO: PRAIRIE MOUNTAIN MEDIA Please call 860-241-3050 option 1 then option 4 for billing inquiries. --- -- - =':--- 2=96- -- lot 4 OUTBOIIND TRACKING NUMBER 9414711899564525007881 RETURN RECEIPT TRACKING NUMBER 9490911899564525007830 ARTICLE ADDRESS TO: Weld County BOCC 1150 0 Street PO Box 758 Greeley CO 80632.0758 III Ensure items 1,2, and 3 are completed. IAttach this card to the back of the mailpiece, or on the front if space permits. 1. Article Addressed to: Weld County BOCC 1150 Co street PO Box 758 Greeley CO 80632-0758 11 Id 11 1 1 9490 9118 9956 4525 0078 30 Ar9taldeell9Rge“;Drgnzgeigrralsege label) PS Form 3811 Facsimile, July 2015 (SDC 3930) •P- AlsommErttatiromair 43:11;11:1:i .641:1111 -cal. er,.,- OUTBOUND TRACKING NUMBER X414 7118 9956 4525 8327 86 RETURN RECEIPT TRACKING NUMBER 9490 9118 9958 4525 8321 35 ARTICLE ADDRESS TO: 1 • r • I. .4 J -I . IP 41 4.2.41 . - -"as==.- West Greeley Conservation District 4302 w 9th street Rd Greeley CO 80634m1317 FEES Postage per piece Certified Fee Return Receipt Fee Total Postage & Fees: FEES ti Postmark Here • $0.690 $4.850 $4100 $9.640 • • h ti •3 LL .•t r •r _ . / '. a L T • -• • tare: ( 0 Addressee orD Agent) • Er • J {: , r U re �J •} S f ' } 1:::."(Ht'l dr?' 7:1; 11446- •I ti D. Is delivery address different from item 1? DYes If YES, enter delivery address below: ❑ No Postage per piece Certified Fee Return Receipt Fee Total Postage & Fees: Postmark Here r F W Domestic return Receipt le *4 t at. 9 * lgi $0m690 $4.850 $4100 $9.840 • 1 _ 'Irgi i� , I r �, JraL -411 ti lIT Ensure items 1,2, and 3 are completed. Attach this card to the back of the mailpiece, or on the front if space permits. 1 e Article Addressed to: a t West Greeley Conservation District 4302 VV 9th street Rd Greeley CO 8064-1 1 7 lit 11 11 1 949Q 911s 99564475442200 2. Article '4 fi"18 9it•a6n S447��duyilif label) PS Form 3811 Facsimile, July 2015 (SDC 3930) A. Signature: Addressee or ❑ Agent) D.ls delivery address different from item 1,# Yes if YES, enter delivery address below: 0 No 3. Service Type certified Mail W 4. I S i Dom6sti� Return Receipt I I if 4 I1 - OUTBOUND TRACKING NUMBER 9414711899564475442220 RETURN RECEIPT TRACKING NUMBER 9490911899564475442200 ARTICLE ADDRESS TO: West Greeley Conservation District 4302 W 9th Street Rd Greeley CO 80634-1317 -rkLammummximp. •••3101e - OUTBOUND TRACKING NUMBER 94147118995644754161 84 RETURN RECEIPT TRACKING NUMBER 94909118995644754161 33 ARTICLE ADDRESS TO: Weld Countyl3OCC, 1150 0 Street PO Box 758 Greeley CO 80632=-0758 FEES Postage per piece Certified Fee Return Receipt Fee $0.640 ri -01 rrV ‘i\ eff/ r Total Postage & Fees"/4 \\\ r2-} $8.690 FEES Postmar Here . ' } I ' \\ r!%:.- LA<..) : P) f + r F "Wilk% gale 1415 " of .-.-1r44-y GiK +rpj yt ."` 5_1.1. 4 '-`7. C ' f ... :, -.....,-_. --- -- r E • L • I • • "N. le13'.4"7:k.-.) t �s- 7N= • (postage per piece certified Fee Return Receipt Fee Total Postage & i /,/ I t { Lrr d e kek. • SOw640 $4.40G, (us' ) J / //rift i 114:41 • 1'% //f /-7--;.--. 1:3) '.:--71A-1 i 0 u ..,AL,.. 1 rt 1. • OU.'11P EXHIBIT R PROOF OF FILING WITH COUNTY CLERK A return receipt from the Weld County Clerk & Recorder is attached. Weld County Clerk and Recorder 1250 H Street Greeley, CO 80631 Marcovich Gravel Pit November 2024 R-1 © Lewicki & Associates L Lewicki & Associates ENGINEERING I GEOLOGY I ENVIRONMENTAL October 28th, 2024 County Clerk & Recorder Weld County 1250 H St Greeley, CO 80631 Marcovich Mining Resource DRMS M2024-034 Construction Materials Reclamation Permit Application, County Copy To Whom It May Concern Enclosed is a notice for a 112 application with adequacy response updates to the Colorado Division of Reclamation, Mining, and Safety for the operation to be known as the Marcovich Mining Resource. The applicant is Asphalt Specialties Co. Inc. The Colorado Division of Reclamation, Mining, and Safety requires evidence that the application has been filed with your office. Therefore, please sign and date below, then scan and email a copy to the address provided. Thank you. Please contact me if you have any further questions or concerns at (720) 842-5321 ex. 1. The application was received on the following date: Received by: Regards, Benjamin Langenfeld, P.E. Lewicki & Associates, PLLC (720) 842- 5321 benl@Iewicki.biz Marcovich Mining Resource October 2024 Lewicki & Associates EXHIBIT S PERMANENT MAN-MADE STRUCTURES The following is a list of man-made structures within 200 feet of the affected area. All of these structures are shown on Map C-1. Landowner boundaries can also be found on Map C-1. Proof of delivery of structure agreements is attached to this exhibit. In the event that a structure agreement is unobtainable, defer to the Geotechnical Stability Exhibit which indicates that all structures will be protected. Table S-1. Permanent Structures within 200' of the Affected Area Owner Sakata Land Co. Owner Address PO BOX 508 Brighton, CO 80601 Structures Access Road fences culverts, return irrigation ditch General Location Parcel directly south of the permit area and across Highway 85 from the permit area. Lawrence Scott 1165 S Denver Ave Fort Lupton, CO 80621 Fence, culvert, and return irrigation ditch Located east of the affected area across Highway 85 City of Aurora 15151 E ALAMEDA PKWY # 3200 AURORA, CO 800121555 Fence, culvert, and return irrigation ditch North of permit area. Xcel Energy 7493 Highway 85 Fort Lupton, CO 80621 Powerlines servicing permit area and property to the north. East of permit area. Colorado Department of Transportation 10601 W. 10th St. Greeley, CO 80634 US Highway 85 and related structures. East of permit area. Marcovich Gravel Pit November 2024 S-1 © Lewicki & Associates Asphalt Specialties Co., Inc 345 W 62nd Ave Denver, CO 80216 June 20, 2024 RE: Marcovich Pit City of Aurora 15151 E Alameda Parkway #3200 Aurora, CO 80012 Asphalt Specialties Co., Inc. intends to mine on property they control in Weld County, Colorado in Section 7 of T1N and R66W of the 6th Principal Meridian. This letter has been provided to you as the owner of a structure on or within two hundred (200) feet of a proposed mine site. The following structures are located on or within 200 feet of the proposed affected area: 1. Fence 2. Culvert 3. Return irrigation ditch 4. , r t1- 4S3 i� 5. If there are any questions, I can be contacted at (303) 289-8555 or you can contact the project engineer, Ben Miller, PhD., at (720) 842-5321. If you agree, please sign and notarize the enclosed letter and send it back to me. If you are not authorized to sign this, please present it to the proper person who is authorized. Signed• :; Date Printed Name: Ct uw 1 CERTIFICATION The Applicant, Asphalt Specialties Co. Inc., represented by Greg Geras, as Land Resource Manager, does hereby certify that City of Aurora shall be compensated for any damage from the proposed mining operation to the above listed structure(s) located on or within 200 feet of the proposed affected area described within Exhibit A, of the Colorado Mined Land Reclamation Board Reclamation Permit Application for the Marcovich pit. This form has been approved by the Colorado Mined Land Reclamation Board pursuant to its authority under the Colorado Land Reclamation Act for the Extraction of Construction Materials and the Colorado Mined Land Reclamation Act for Hard Rock, Metal, and Designated Mining Operations. Any alteration or modification to this form shall result in voiding this form. NOTARY FOR PERMIT APPLICANT ACKNOWLEGED BY: i Applicant • Date Representative Name STATE OF _ COUNTY OF ) ss. Title The foregoing was acknowledged before me this day of , 20, by as Notary Public of My Commission Expires: Jan Nelson NOTARY PUBLIC STATE OF COLORADO NOTARY ID 19994030527 MY COMMISSION EXPIRES May 03, 2028 2 NOTARY FOR STRUCTURE OWNER WITHIN 200 FT OF MARCOVICH PIT AFFECTED AREA ACKNOWLEGED BY: Structure Owner A_ Date STATE OF A ) ) ss. COUNTY OF ) Name Title \ �� _ • •I/ : c tom. t- The foregoing was acknowledged before me this - day of 20 *, by as of My Commission Expires: Notary Public Casey Lee Burgeson NOTARY PUBUC STATE OF COLORADO NOTARY IO# 2(1204017584 MY COMMISSION EXPIRES 05/20/2028 3 ?G ; Asphalt Specialties Co., Inc 345 W 62nd Ave Denver, CO 80216 June 20, 2024 RE: Marcovich Pit Colorado Department of Transportation 10601 W 10th St Greeley, CO 80634 Asphalt Specialties Co., Inc. intends to mine on property they control in Weld County, Colorado in Section 7 of T1N and R66W of the 6th Principal Meridian. This letter has been provided to you as the owner of a structure on or within two hundred (200) feet of a proposed mine site. The following structures are located on or within 200 feet of the proposed affected area: 1. US Highway 85 and related structures 2. 3. 4. 5. If there are any questions, I can be contacted at (303) 289-8555 or you can contact the project engineer, Ben Miller, PhD., at (720) 842-5321. If you agree, please sign and notarize the enclosed letter and send it back to me. If you are not authorized to sign this, please present it to the proper person who is authorized. Signed: _ I . /Z...6-- Date Printed Name: 1 CERTIFICATION The Applicant, Asphalt Specialties Co. Inc., represented by Greg Geras, as Land Resource Manager, does hereby certify that Colorado Department of Transportation shall be compensated for any damage from the proposed mining operation to the above listed structure(s) located on or within 200 feet of the proposed affected area described within Exhibit A, of the Colorado Mined Land Reclamation Board Reclamation Permit Application for the Marcovich pit. This form has been approved by the Colorado Mined Land Reclamation Board pursuant to its authority under the Colorado Land Reclamation Act for the Extraction of Construction Materials and the Colorado Mined Land Reclamation Act for Hard Rock, Metal, and Designated Mining Operations. Any alteration or modification to this form shall result in voiding this form. NOTARY FOR PERMIT APPLICANT ACKNOWLEGED BY: Applicant • Date --- Representative Name Title STATE OF COUNTY OF ) ss. The foregoing was acknowledged before me this day of _ , 20, by as of Notary Public My Commission Expires: Jan Nelson NOTARY PUBLIC STATE OF COLORADO NOTARY ID 19994030527 MY COMMISSION EXPIRES May 03, 2028 2 NOTARY FOR STRUCTURE OWNER WITHIN 200 FT OF MARCOVICH PIT AFFECTED AREA ACKNOWLEGED BY: Structure Owner (.01ortda 'ail 07rr "if 5 f4^7LName Date STATE OF (plordo COUNTY OF L'th ) ss. Title RO k kJ 14e. e The foregoing was acknowledged before me this Z4 day of . 20R)( , by /94. Ski kef--5`/'cin as Notary Public ,ed u) %L':.ti,(yeit, of c. boy My Commission Expires: 3 3/7/4 DAMIEN GANG NOTARY PUBUC STATE OF COLORADO NOTARY ID 20224009228 MY COMMISSION EXPIRES 03/07/2026 SENDER: COMPLETE THIS SECTION -COMPLETE THIS SECTION ON DELIVERY A. Signature: ( ❑ addressee ❑r O agent) DENVER ER CO 8,,! • Ensure items 1, 2, and 3 are completed. II Attach this card to the hack of the mailpiece, or on the front if space permits. B. Received By: {Printed Names 1. Article Addressed to: Martin Williams 302O -Richfield Dr Colorado Spgs CO 80919-4535 lilllli 11111111 111111 1lII 11111 I 111111 11 1 A 9490 9118 9956 4520 5574 84 D.ls delivery address different from item i7 ❑Yea If YES, enter delivery address below; El No 2. Article Number (Transfer tram service;abelj 9414 7118 9956 4520 5574 42 PS Form 3611 Facsimile, July 2016 (SAC 3430) 3. Service Type ® Certified Mall@ Domestic Return Receipt $9.640 us.POSTAGE FIRST LASS EROM 3 00/20024 77/22 St&runs �II�IIIYIIII�IIIMIIInVI 9414 7118 9956 4520 5574 Martin Williams 3020 Richfield Dr Colorado Spgs CO 8091 'lriff tfIill; iifl ii](j!]Ili II lii1)t i1 sibIll!l3 111 Zr w .71 z 0 z 0 H c] w cn• 0, E. I — w I — w EL 2 0 O .7' 1- © Certified Mail • ) Cl 9490 9118 9956 ti4.0 a Eo z 2 Tr a T C, T a LL U - ENDER: COMPLETE THIS SECT a M M C? , W v CO 0 i ❑ O3 .210 wrim eal 9490 9118 995645 a n a U - a LL U J U ❑ z 0 2 F U U] U, r w r W J a 2 0 U 0 m w S:x i;� 3. Service Type Certified Mail 2 Le, T cp co 0 JcU E > _ ❑ LL • • nowem 00 i m a 9490 3118 9956 4520 5508 29 2. gfigan' Codified Mail ENDER: COMPLETE THIS SECTION 00101 —.r Ons 00111 MIMOI 9490 9148 9956 4520 5741 22 PS Form 3811 Facsimile, July 2015 MCC 3830) a a m e T SENDER: COMPLETE THIS SECTION • Ensure items 1, 2, end 3 are completed. ▪ Attach this card to the hack of the mailplece, or on the front if space permits. COMPLETE THIS SECTION ON DELIVERY A. Signature: ( ❑ AddresseeOCR NC111ly_;` C• ef •.. Yy,, • �Ftgcelve y: (Printed Name) C. Date of Delivery 1. Article Addressed to: Lawrence Scott 1165 S Denver Ave Fort Lupton CO 80621-8373 IlIIlI 1111111111111! I1I lull UI I O11lI H 9490 9118 9956 4520 5200 99 Q.Is delivery address different from herd 1? 1'2Yes kf YES, enter delivery address below: MNo 2. AA* Pignillgtail5r2OVIOEVOte label] 3. Service Type Certified Maile PS Form 3511 Facsimile, July 2015 (SDC 39361 SENDER: COMPLETE THIS SECTION ■ Ensure items 1, 2, and 3 are completed. • Attach this card to the hack of the mallpiece, or on the front if space permits. Domestic Return Receipt . COMPLETE THIS SECTION ON DELIVERY A. Stgdature: ( ❑ Addressee or ❑ Men() ic'6.e`. I 'a, B. Rece' d By: (Print -td E f e,J 1'1)1;1;1O1i D.Is delivery address different From item 1? ':.` l''es if YES, enter delivery address below: 0No 1. Article Addressed to: Elizabeth Ann Wethington 254 Donna St Fort Lupton CO 80621-1284 ii hill 111111111 1ihI1 111I 1 II 1ll1 ill !1Il 9490 9118 9956 4520 5997 57 o elfM 2. A947r} 118 9EMINir a lebey 3. Service Type 2 Certified Mails PS Form 3811 Facalmlfe, July 2015 (SOC 3930) Domestic Return Receipt r 1' _ � Fill .0-., OUTBOUND TRACKING NUMBER 9414 7118 9956 4179 1049 88 RETURN RECEIPTSING NUMBER 9490911899564479104937 ARTICLE ADDRESS TO: CE)O1- 10601 With St Greeley CO 80634.9000 f ti OUTBOUND TRACKING NUMBER 9414 7118 9956 4479 1885 75 RETURN RECEIPT TRACKING NUMBER 9490 9118 99a6 4479 1872 13 ARTICLE ADDRESS TO: FEES Postage per piece Certified Fee Fee Return Receipt r=._ • Total Postage & Fees: /, ...r,.,• ., r • -r.- ------- 1:::::. IN•' fr. l y1. r _ .. ., •r ti y I ' V. ' N, ' •• ,-•—'.'-; _ { J• Y X 7 / a r i? • Postma Here • • • rrPPW" .�- • '-'11!Ir .- - r +P=F—tip • Lawrence Scott 1165 S DenverAve Fork Lupton CO 80621-8373 -Er- T•. - -- � — _r� - ----•----- _-I - - ti OUTBOUND TRACKING NUMBER 9414 7118 99x6 4479 106937 RETURN RECEIPT TRACKING NUMBER 949U 9118 9956 d479 106979 ARTICLE ADDRESS TO: • • FEES r T \:\ k !IL+. •': ) . •• \ r _�, ~ y ... ,rte - + _ ' i r ~ ' rrr I 1' I. p_ •: J' • -'-'1.--'•- j , ...: ''' $0.640 $4•400 Pr. • .�� • 5 •.• .1•• �r 1,- R=!1 - .. . ) ,5••''"'-...,,, I I I. Y./ 1.1 7{ice F ,- 'c'S-wilk...w 111;;,.. k I 3 '~ t.:11' r a • L• ,4 '_ - Ortr1 _ t. 41116.: \ , c, ....0.:ILA . { \ ; I1 � ' r 4 ki 1 - / If '• } l 4 L ' ~ ' - rj{ a ti j4,r - • — —•— NEN • • ) _ — — .• Postage per piece $0.640 J. I I I• ` m= Certified Fee ,r •-•5..„./5--- u 1 74-.....--r - J ' N.4-- % .L.;.-1.- ' k ..e., • ill J Lc 1 ii .1-:. kl. r Return Receipt Fee .,.,.....„.. r— ` �ti1[ ; 1 1 Y ,_,....., ,........"7,_,.0_J er,.....,-\ ‹.%.__:?) ,,.-. . 5 / ' + 0: re 5 ,_ ,... ,........ • ,.„ ,... ,_._. ,,, - r f , $86913 , Total Postage & • 71. '... (,,,,. I ..• \lir) •.:•, Fee.:!/P.4 :Ic : \IIN � JF k}} Fr _ 0 ‘ -,_ / . (1; .. _ L ••• ...._ ill.) r • i r• �-• e t. _J --_—> 1111% ., Ni) \LI \\, r r J F , r 1 Jell r zti I 4i AP r J fil I., \ I I, :� • f ti J� I I r,} - 1 �'I1 • j I + I' j r r , ' i I (...----) 5 11 l ' I I '' F I� a i. 1 +�, ' 1 , 1 L f r:•• 4. L r • r .4 1 r i r I a !` JI F M1\1 ti \ II r 4. t r , ! — Icel Energy 7493 UUs Highway 85 Fork Lupton CO 806 1- 09 •-• . --1—_ —=— FEES y r k4 11 *i Postma Here , .,._ -6 c eij ti 02 r r� r .d %. 71./ Y\ -- . '.. II 7, - ._, ;_ , ' } } ' ti �, r '� I. ■ L // f 1/4 f i r _ ' 1 hostage per piece $0.G40 Certified Fee Return Receipt Fee = `' e TotalPostage&Fees + •1 Postma • ...,:) - . , . ..:T''.L.k.-L') . d.: • r r, It , { —+ ' �5 N : .' � J Of I ' '' ) I r a — — I Cyr f ti 1 I . - . 1 1 r. Lk .1, Here .\\ 2.1 I • ••3 :• - i ce • ty • � z - 1 • E. _..- ; • II;.:•). .00 • • ,4' 1.4:-'1% / \\I.:\ ( ? d \ciN x% \ \ ''' (..; :'.. r.- A ‘....'• t/ \ j 6 .. \ il \• ..;. V%;.2 F(/ rf- • r. f • f• -MF IMP — 1 F �L_ - F k. '1 ;. 14 dl fur IL '. r)liir li rk IV 44,4 kr' 14 I If 4r. • F 1 OUTBOUND TRACKING NUMBER 9414 7118 9956 4479 4199 83 RETURN RECEIPT TRACKING NUMBER 9490911899564479419932 ARTICLE ADDRESS TO: S akata Land Co P O fax 508 Brighton CO 80601-0508 .. . r • :L : TM OUTBOUND TRACKING NUMBER 9414711899564479430230 RETURN RECEIPT TRACKING NUMBER 9490911899564479430272 ARTICLE ADDRESS TO: •ti - L -mow sue' A-1 _- - - - — FEES Postage per piece certified Fee Return Receipt Fee Total Postage & Fees: City of Aurora 15151 E Alameda Pkwy Ste 360Q Aurora CO 80012-1555 •.7 Mr - r 1I. S Postmark Here M } 5 .1 r fir' C r • I } f Sr . $0.640 $4.400 = I • Lei I .• r f 77 ' I,.,dr ti _ �I a" •-. x :; 34t -. �"- I.,1 • . r � r- • Ir I rte. � I U � y ) rr f 4 • 3 .L ✓ r ' I r • I I r ' • l '� ; f I 1 } I� i } 1 k • ''-- -'+r=-"'�`!E I F .....„ ++ 1 1 F l A + �1 L::)/L, 1 � r r 3 # +4 ` +.-„,-....•—.tiff rj I 1 I r �� k. 5 _ : (4/ z � \N•'. 'r \-\\ ..,..„,:z„:„..-.F.� r.7 \, y L r I r J + r'. I. I• 11 I I r r fre . • , ' ▪ •• fir { V} ' • r_r L_ r L .~ • '' - ~ r + f./ r1 - t • t r • - s=4=---14=1; FEES Postage per piece certified Fee Return Receipt Fee Total Postage & Fees: i Irr r ;f L I I Pastor` Here wma I' Pr r 1 r ▪ • e . r' •- r: '• l{ }'1 f+ f L 5. �_. • J • r • +. $0.640 $4.400 S:1•65 { '- fir_ -f • • }. - • ��fl. it ,r ' dr::\IHNI I01,,.'3.„. . I - ' 1 I + , I\max L•r //,' ri %::\ t.'jr;:/(1▪ '. „.• N. .. 4a ks • i .I:-.1 r.-:„ ME I • • I - or • • J. r ''., \ • I, --•-•'L re'77-1.. 7,...i. %.,-.3. ,,,,. ....-... . iv-, \.. i ''> , -,_..._ • • r • t , oi hY. • • C.J.i \I • • RULE 1.6.2(1)(B) Prior to the submittal of the application, a sign was erected at the entrance to the site that contains the required information dictated by Rule 1.6.2(1)(b). Please see attached sign certification. Marcovich Gravel Pit November 2024 © Lewicki 8i Associates DATE NOTICE THIS SITE KNOWN AS THE MARCOVICH MINING RESOURCE IS THE LOCATION OF A PROPOSED CONSTRUCTION MATERIALS OPERATION. ASPHALT SPECIALTIES CO., INC., WHOSE ADDRESS AND PHONE NUMBER IS 345 W. 62ND AVE., DENVER, COLORADO 80216 / (303) 289-8555, HAS APPLIED FOR A RECLAMATION PERMIT WITH THE COLORADO MINED LAND RECLAMATION BOARD. ANYONE WISHING TO COMMENT ON THE APPLICATION MAY VIEW THE APPLICATION AT THE WELD COUNTY CLERK AND RECORDER'S OFFICE, 1250 H STREET, GREELEY, COLORADO 80631, AND SHOULD SEND COMMENTS PRIOR TO THE END OF THE PUBLIC COMMENT PERIOD TO THE DIVISION OF RECLAMATION, MINING, AND SAFETY, 1313 SHERMAN ST, ROOM 215, DENVER, COLORADO 80203. Certification: I, Greg Geras, hereby certify that I posted a sign containing the above notice for the proposed permit area known as the Marcovich Mining Resource, on June 14, 2024. , 2024 SIGNATUI E Sign posted on 6/14/24 on -site adjacent to HWY 85. i' Et•e ` :.,. ' NOTICE THIS SITE KNOWN AS THE MARCOVICH MINING RESOURCE OS THE LOCATION CF A PROPOSED CONSTRUCTION MATERIALS OPERATION. ASPHALT SPECIALTIES CO., INC WHOSE ADDRESS AND PHONE HONOUR 15345 W 6UNDME DENVER. COLORADO 80216/f3D3128P-8555. HAS APPLIED FOR A RECLAMATION PERMIT WITH THE COLORADO MINER LAND RECLAMATION ROAM. ANYONE WISHING TO COMMENT ON THE AFPUCATION NAY VIEN THE APPLICATION ATTHE WELD COUNTY CLEAN AND RECORDER'S OFFICE, MOH STREET. GREELED, COLORADO 80611 AND SHOULD SEND COHNENIS PRIORTO INTEND 0flIIE PUBLIC COMMENT PERIOD TOME DIVISION OF RECLAMATION. MINING, AND SAFEIV.1313 SHERMAN ST. ROOM AID, DENVER COLORADO80203 :G RULE 6.5: GEOTECHNICAL STABILITY EXHIBIT There are no known geologic hazards on the proposed site. Based on a slope stability analysis, buildings or other structures within 200' of the Marcovich affected area will not be affected by mining excavation. Sufficient buffers will be maintained to structures. Maps C-3 and F-1 shows these buffers. Slurry walls installed prior to mining will be 30 -ft away from the edge of mining. Map C-3 shows the mining and reclamation slopes of the mine. A standard slope was analyzed for stability as it is a good example of the nearest structure, the slurry wall. The material properties are derived from Table 2.5 in the SME Mining Reference Handbook', as there is no site -specific strength data of the material available. Therefore, all materials are matched to a classification from this table that best matches the materials in terms of description. The native alluvial material is best classified as sand and gravel with a mixed grain size. A layer of overburden and sand lies atop the sand and gravel deposit. This material is best described as loose sand, mixed grain size. The bedrock is a soft sedimentary rock (claystone/siltstone) according to the SME Table 2.5. A summary of the material properties can be seen in Table 6.5-1. Table 6.5-1 Material Properties Material Sand and gravel, mixed grain size Unit Weight (lbs/ft) Cohesion Friction Angle 110 0 45 Loose sand, mixed grain size 99 0 34 Bedrock 110 20,000 25.0 The final mining (1.5H:1V) and final reclamation (3H:1V) slopes were analyzed. Mining will be conducted at a near active highwall angle until the highwall has reached the half -way point of the final mining slope. Then the vertical active highwall slope will be knocked down to the final mining slope of 1.5H:1V. Then it will be backfilled with overburden/sand to the final reclamation slope of 3H:1V. The final mining and reclaimed slope crests will be the closest excavation comes to the slurry wall and any structures. 1. Mining and Reclamation Slopes Factor of Safety is expressed in terms of strength divided by stress as a ratio. It is arrived at by an iterative computer process where a slope failure is assumed, the strength and stress of that 1 Original source: Hoek and Bray 1977 GS -1 © Lewicki & Associates slope failure are calculated, and those values are compared to determine a lowest factor of safety. In the case of the Marcovich slope stability analysis, the Bishop's Method of Slices was the iterative calculation used, and the software GALENA was used to model slopes and calculate the factor of safety. One slope closest to major structures (see Figure GS -1) was analyzed to look at the factor of safety. Table GS -1 lists the analysis conducted and their respective factors of safety. GALENA data tables and analysis result figures are attached as Appendix GS -1. Figure GS -1. Locations of Slope Stability Analysis from Map F-1 GS -2 © Lewicki & Associates Figure GS -2. GALENA Cross Sections (Mining and Reclamation) GS -3 © Lewicki & Associates Table GS -1. Factors of Safety for Slope Stability Slope Condition Full Mining Final Reclamation Lowest Factor of Safety (static) 1.58 3.03 Lowest Factor of Safety Nearest Structure (seismic) 1.40 2.57 Slurry wall Slurry wall 2. Conclusion The Final Reclamation slope has a minimum factor of safety (FoS = 3.03) of greater than 1.5 for static conditions. The Final Mining slope also has a minimum FoS greater than 1.5 (1.58) for static conditions. These Factors of Safety are greater than the CDRMS minimum for critical structure of 1.5. The seismic conditions analysis for both scenarios are similarly above the CDRMS minimums for critical structures: 1.40 > 1.3 and 1.57 > 1.3 The slope stability analysis in this permit has been prepared according to appropriate engineering standards and practices. Ben Langenfeld, P.E. P.E.# 0047151 GS -4 © Lewicki & Associates APPENDIX GS -1 GALENA INFORMATION GS -5 © Lewicki & Associates 5000 4980 4960 4940 4920 4900 4880 4860 4840 4820 4800 4780 4760 0 GALENA Version 7.1 50 100 150 200 250 300 Licensed to: Greg Lewicki and Associates Material Keys 1: Sand and gravel, mixed grain size 2: OB - loose sand, mixed grain size 3: Bedrock - claystone 4: Slurry Wall Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular Results Critical Factor of Safety: Project Marcovich Mining Condition File: E:IWorkIGLA Dropbox\Ben LangenfeldlAsphalt Specialties\Marcovich\Slope StabilitylMarcovich Slope Stability.gmf 1.58 Edited: 3 May 2024 Processed: 3 May 2024 © Lewicki S; Associates 5000 4980 4960 4940 4920 4900 4880 4860 4840 4820 4800 4780 4760 0.050 0 GALENA Version 7.1 50 100 150 200 250 300 Licensed to: Greg Lewicki and Associates Material Keys 1: Sand and gravel, mixed grain size 2: OB - loose sand, mixed grain size 3: Bedrock - claystone 4: Slurry Wall Analysis 2 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular (Critical Seed) Results Critical Factor of Safety: Project Marcovich Mining Condition File: E:II/VorkIGLA Dropbox\Ben LangenfeldlAsphalt Specialties\Marcovich\Slope StabilitylMarcovich Slope Stability.gmf 1.40 Edited: 3 May 2024 Processed: 3 May 2024 © Lewicki S; Associates 5000 4980 4960 4940 4920 4900 4880 4860 4840 4820 4800 4780 4760 0 GALENA Version 7.1 50 100 150 200 250 300 Licensed to: Greg Lewicki and Associates Material Keys 1: Sand and gravel, mixed grain size 2: OB - loose sand, mixed grain size 3: Bedrock - claystone 4: Slurry Wall Analysis 3 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular Results Critical Factor of Safety: 3.03 Project Marcovich Reclaimed Condition File: E:IWorkIGLA Dropbox\Ben LangenfeldlAsphalt Specialties\Marcovich\Slope StabilitylMarcovich Slope Stability.gmf Edited: 3 May 2024 Processed: 3 May 2024 © Lewicki S; Associates 5000 4980 4960 4940 4920 4900 4880 4860 4840 4820 4800 4780 4760 0.050 0 GALENA Version 7.1 50 100 150 200 250 300 Licensed to: Greg Lewicki and Associates Material Keys 1: Sand and gravel, mixed grain size 2: OB - loose sand, mixed grain size 3: Bedrock - claystone 4: Slurry Wall Analysis 4 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular (Critical Seed) Results Critical Factor of Safety: 2.57 Project Marcovich Reclaimed Condition File: E:II/VorkIGLA Dropbox\Ben LangenfeldlAsphalt Specialties\Marcovich\Slope StabilitylMarcovich Slope Stability.gmf Edited: 3 May 2024 Processed: 3 May 2024 © Lewicki S; Associates GALENA 7.1 Analysis Results Version: 7.10.1.04 Licensee: Greg Lewicki and Associates Project: Marcovich File: E:\Work\GLA Dropbox\Ben Langenfeld\Asphalt Specialties\Marcovich\Slope Stability\Marcovich Slope Stability.gmf Processed: 03 May 2024 08:21:43 DATA: Analysis 1 - Mining Condition Material Properties (4 materials) Material: 1 (Mohr -Coulomb Isotropic) - Sand and gravel, mixed grain size Cohesion Phi UnitWeight Ru 0.00 45.0 110.00 Auto Material: 2 (Mohr -Coulomb Isotropic) - OB - loose sand, mixed grain size Cohesion Phi UnitWeight Ru 0.00 34.0 99.00 Auto Material: 3 (Mohr -Coulomb Isotropic) - Bedrock - claystone Cohesion Phi UnitWeight Ru 20000.00 25.0 110.00 Auto Material: 4 (Mohr -Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 0.0 112.00 Auto Saturated: 0.00 0.0 115.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 0.000 Material Profiles (4 profiles) Profile: 1 (2 points) Material beneath: 2 - OB - loose sand, mixed grain size 0.00 4900.00 300.00 4900.00 Profile: 2 (2 points) Material beneath: 1 - Sand and gravel, mixed grain size 0.00 4897.00 300.00 4897.00 Profile: 3 (2 points) Material beneath: 3 - Bedrock - claystone 0.00 4850.00 300.00 4850.00 Profile: 4 (5 points) Material within: 4 - Slurry Wall 65.00 4895.00 70.00 4895.00 70.00 4845.00 65.00 4845.00 65.00 4895.00 Slope Surface (4 points) 1.00 4897.00 100.00 4897.00 139.00 4872.00 300.00 4872.00 Phreatic Surface (2 points) 0.00 4895.00 66.00 4895.00 Piezometric Surfaces (1 surface) Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 100.90 YL: 4896.42 XR: 138.80 YR: 4872.13 Centre: XC: 143.94 YC: 4921.86 Radius: R: 50.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 25.00 20.00 10.50 Trial positions within range: 10 10 10 RESULTS: Analysis 1 - Mining Condition Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Factor of Safety for initial failure surface approximation: 1.759 There were: 705 successful analyses from a total of 1001 trial surfaces 296 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.58 Results Summary - Lowest 99 Factor of Safety circles Circle X -Left Y -Left X -Right Y -Right X -Centre Y -Centre Radius FoS 1 113.40 4888.41 128.80 4878.54 150.50 4929.35 55.25 1.584 <-- Critical Surface 2 113.40 4888.41 128.80 4878.54 149.87 4928.35 54.08 1.585 3 113.40 4888.41 128.80 4878.54 149.23 4927.35 52.92 1.586 4 113.40 4888.41 128.80 4878.54 148.59 4926.36 51.75 1.588 5 113.40 4888.41 128.80 4878.54 147.95 4925.36 50.58 1.589 6 113.40 4888.41 128.80 4878.54 147.31 4924.36 49.42 1.590 7 113.40 4888.41 131.02 4877.11 151.49 4928.43 55.25 1.592 8 113.40 4888.41 128.80 4878.54 146.67 4923.36 48.25 1.592 9 113.40 4888.41 131.02 4877.11 150.85 4927.43 54.08 1.593 10 113.40 4888.41 128.80 4878.54 146.02 4922.36 47.08 1.593 11 110.62 4890.19 128.80 4878.54 148.95 4929.98 55.25 1.594 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 113.40 113.40 110.62 113.40 110.62 113.40 113.40 110.62 113.40 113.40 110.62 113.40 113.40 110.62 110.62 113.40 113.40 110.62 110.62 107.84 113.40 113.40 110.62 110.62 107.84 113.40 113.40 110.62 110.62 107.84 113.40 113.40 110.62 4888.41 4888.41 4890.19 4888.41 4890.19 4888.41 4888.41 4890.19 4888.41 4888.41 4890.19 4888.41 4888.41 4890.19 4890.19 4888.41 4888.41 4890.19 4890.19 4891.97 4888.41 4888.41 4890.19 4890.19 4891.97 4888.41 4888.41 4890.19 4890.19 4891.97 4888.41 4888.41 4890.19 131.02 128.80 128.80 131.02 128.80 128.80 131.02 128.80 131.02 133.24 128.80 131.02 133.24 128.80 131.02 131.02 133.24 128.80 131.02 128.80 133.24 131.02 131.02 128.80 128.80 133.24 131.02 131.02 128.80 128.80 135.47 133.24 131.02 4877.11 4878.54 4878.54 4877.11 4878.54 4878.54 4877.11 4878.54 4877.11 4875.69 4878.54 4877.11 4875.69 4878.54 4877.11 4877.11 4875.69 4878.54 4877.11 4878.54 4875.69 4877.11 4877.11 4878.54 4878.54 4875.69 4877.11 4877.11 4878.54 4878.54 4874.27 4875.69 4877.11 150.20 145.38 148.31 149.56 147.67 144.74 148.92 147.02 148.27 152.45 146.38 147.63 151.81 145.74 149.91 146.98 151.16 145.09 149.27 147.37 150.52 146.34 148.62 144.44 146.73 149.87 145.69 147.97 143.80 146.08 153.40 149.22 147.33 4926.43 4921.36 4928.98 4925.43 4927.98 4920.35 4924.43 4926.97 4923.42 4927.49 4925.97 4922.42 4926.49 4924.96 4929.03 4921.41 4925.48 4923.96 4928.03 4930.57 4924.47 4920.40 4927.02 4922.95 4929.56 4923.46 4919.39 4926.01 4921.94 4928.55 4926.52 4922.45 4925.00 52.92 1.595 45.92 1.595 54.08 1.595 51.75 1.596 52.92 1.597 44.75 1.597 50.58 1.598 51.75 1.599 49.42 1.600 55.25 1.601 50.58 1.601 48.25 1.602 54.08 1.602 49.42 1.603 55.25 1.603 47.08 1.604 52.92 1.604 48.25 1.605 54.08 1.605 55.25 1.605 51.75 1.607 45.92 1.607 52.92 1.607 47.08 1.607 54.08 1.607 50.58 1.609 44.75 1.609 51.75 1.609 45.92 1.610 52.92 1.610 55.25 1.611 49.42 1.611 50.58 1.612 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 107.84 110.62 113.40 110.62 113.40 110.62 107.84 113.40 110.62 107.84 113.40 110.62 107.84 113.40 110.62 107.84 105.07 113.40 110.62 107.84 113.40 110.62 107.84 105.07 113.40 113.40 110.62 107.84 113.40 110.62 107.84 105.07 113.40 4891.97 4890.19 4888.41 4890.19 4888.41 4890.19 4891.97 4888.41 4890.19 4891.97 4888.41 4890.19 4891.97 4888.41 4890.19 4891.97 4893.75 4888.41 4890.19 4891.97 4888.41 4890.19 4891.97 4893.75 4888.41 4888.41 4890.19 4891.97 4888.41 4890.19 4891.97 4893.75 4888.41 128.80 128.80 135.47 133.24 133.24 131.02 128.80 135.47 133.24 131.02 133.24 131.02 128.80 135.47 133.24 131.02 128.80 133.24 131.02 128.80 135.47 133.24 131.02 128.80 137.69 133.24 131.02 128.80 135.47 133.24 131.02 128.80 137.69 4878.54 4878.54 4874.27 4875.69 4875.69 4877.11 4878.54 4874.27 4875.69 4877.11 4875.69 4877.11 4878.54 4874.27 4875.69 4877.11 4878.54 4875.69 4877.11 4878.54 4874.27 4875.69 4877.11 4878.54 4872.84 4875.69 4877.11 4878.54 4874.27 4875.69 4877.11 4878.54 4872.84 145.43 143.15 152.75 150.85 148.57 146.68 144.78 152.10 150.21 148.31 147.92 146.03 144.13 151.45 149.55 147.66 145.76 147.27 145.38 143.48 150.80 148.90 147.01 145.11 154.33 146.62 144.72 142.83 150.15 148.25 146.36 144.46 153.67 4927.54 4920.93 4925.51 4928.06 4921.44 4923.99 4926.53 4924.50 4927.04 4929.59 4920.43 4922.97 4925.52 4923.48 4926.03 4928.57 4931.12 4919.41 4921.96 4924.50 4922.47 4925.01 4927.56 4930.10 4925.53 4918.39 4920.94 4923.48 4921.45 4924.00 4926.54 4929.09 4924.51 51.75 44.75 54.08 55.25 48.25 49.42 50.58 52.92 54.08 55.25 47.08 48.25 49.42 51.75 52.92 54.08 55.25 45.92 47.08 48.25 50.58 51.75 52.92 54.08 55.25 44.75 45.92 47.08 49.42 50.58 51.75 52.92 54.08 1.612 1.612 1.613 1.613 1.614 1.614 1.615 1.615 1.616 1.616 1.617 1.617 1.617 1.618 1.618 1.619 1.619 1.620 1.620 1.620 1.621 1.621 1.621 1.622 1.622 1.623 1.623 1.623 1.624 1.624 1.624 1.624 1.625 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 110.62 110.62 107.84 113.40 110.62 107.84 105.07 113.40 110.62 107.84 107.84 113.40 110.62 107.84 105.07 113.40 110.62 107.84 105.07 102.29 105.07 107.84 4890.19 4890.19 4891.97 4888.41 4890.19 4891.97 4893.75 4888.41 4890.19 4891.97 4891.97 4888.41 4890.19 4891.97 4893.75 4888.41 4890.19 4891.97 4893.75 4895.53 4893.75 4891.97 135.47 131.02 128.80 135.47 133.24 131.02 128.80 137.69 135.47 133.24 128.80 135.47 133.24 131.02 128.80 137.69 135.47 133.24 131.02 128.80 131.02 133.24 Critical Failure Surface (circle 1) 4874.27 4877.11 4878.54 4874.27 4875.69 4877.11 4878.54 4872.84 4874.27 4875.69 4878.54 4874.27 4875.69 4877.11 4878.54 4872.84 4874.27 4875.69 4877.11 4878.54 4877.11 4875.69 Intersects: XL: 113.40 YL: 4888.41 Centre: XC: 150.50 YC: 4929.35 Generated failure surface: (20 points) 113.40 4885.91 117.12 4883.10 121.10 4880.63 4888.41 114.12 4887.77 4885.32 117.90 4884.75 4882.57 121.92 4882.07 151.78 144.07 142.17 149.49 147.60 145.70 143.80 153.02 151.12 149.23 141.52 148.84 146.94 145.05 143.15 152.37 150.47 148.57 146.68 144.12 146.02 147.92 4927.05 4919.92 4922.46 4920.43 4922.98 4925.52 4928.07 4923.49 4926.03 4928.58 4921.44 4919.41 4921.95 4924.50 4927.04 4922.47 4925.01 4927.56 4930.10 4931.62 4929.08 4926.53 55.25 44.75 45.92 48.25 49.42 50.58 51.75 52.92 54.08 55.25 44.75 47.08 48.25 49.42 50.58 51.75 52.92 54.08 55.25 55.25 54.08 52.92 XR: 128.80 YR: 4878.54 Radius: R: 55.25 114.86 4887.14 118.68 4884.18 122.75 4881.57 1.625 1.627 1.627 1.627 1.627 1.627 1.628 1.628 1.628 1.628 1.631 1.631 1.631 1.631 1.631 1.631 1.631 1.631 1.631 1.634 1.634 1.634 115.60 4886.52 119.48 4883.63 123.59 4881.09 116.36 120.28 124.44 125.30 4880.18 4878.54 126.16 4879.75 127.03 4879.33 127.91 4878.93 128.80 Slice Geometry and Properties - Critical Failure Surface (circle 1, 38 slices) Slice X -S Base PoreWater Normal Test X -Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 113.40 0.02 41.7 0.36 0.48 1 0.00 45.0 1.78 0.00 3.16 0.86 2 113.76 0.05 41.7 0.36 0.48 1 0.00 45.0 5.37 0.00 9.52 0.86 3 114.12 0.08 40.7 0.37 0.48 1 0.00 45.0 8.88 0.00 15.70 0.85 4 114.49 0.11 40.7 0.37 0.48 1 0.00 45.0 12.13 0.00 21.44 0.85 5 114.86 0.14 39.7 0.37 0.48 1 0.00 45.0 15.39 0.00 27.15 0.85 6 115.23 0.17 39.7 0.37 0.48 1 0.00 45.0 18.25 0.00 32.19 0.85 7 115.60 0.19 38.7 0.38 0.48 1 0.00 45.0 21.21 0.00 37.32 0.85 8 115.98 0.22 38.7 0.38 0.48 1 0.00 45.0 23.72 0.00 41.74 0.85 9 116.36 0.24 37.7 0.38 0.48 1 0.00 45.0 26.38 0.00 46.33 0.85 10 116.74 0.26 37.7 0.38 0.48 1 0.00 45.0 28.49 0.00 50.03 0.85 11 117.12 0.28 36.7 0.39 0.48 1 0.00 45.0 30.81 0.00 54.02 0.85 12 117.51 0.30 36.6 0.39 0.48 1 0.00 45.0 32.52 0.00 57.05 0.85 13 117.90 0.31 35.6 0.39 0.48 1 0.00 45.0 34.46 0.00 60.38 0.85 14 118.29 0.33 35.7 0.39 0.48 1 0.00 45.0 35.77 0.00 62.64 0.85 15 118.68 0.34 34.7 0.40 0.48 1 0.00 45.0 37.32 0.00 65.29 0.85 16 119.08 0.35 34.7 0.40 0.48 1 0.00 45.0 38.18 0.00 66.82 0.85 17 119.48 0.36 33.7 0.40 0.48 1 0.00 45.0 39.33 0.00 68.78 0.85 18 119.88 0.36 33.7 0.40 0.48 1 0.00 45.0 39.76 0.00 69.54 0.85 19 120.28 0.37 32.6 0.41 0.48 1 0.00 45.0 40.43 0.00 70.72 0.85 20 120.69 0.37 32.7 0.41 0.48 1 0.00 45.0 40.46 0.00 70.72 0.85 21 121.10 0.37 31.7 0.41 0.48 1 0.00 45.0 40.66 0.00 71.09 0.85 22 121.51 0.37 31.6 0.41 0.48 1 0.00 45.0 40.20 0.00 70.32 0.85 23 121.92 0.36 30.7 0.42 0.48 1 0.00 45.0 39.95 0.00 69.89 0.85 24 122.34 0.35 30.7 0.42 0.48 1 0.00 45.0 39.04 0.00 68.28 0.85 25 122.75 0.35 29.7 0.42 0.48 1 0.00 45.0 38.26 0.00 66.97 0.85 26 27 28 29 30 31 32 33 34 35 36 37 38 123.17 123.59 124.02 124.44 124.87 125.30 125.73 126.16 126.60 127.03 127.47 127.91 128.36 0.34 0.32 0.31 0.29 0.27 0.25 0.22 0.19 0.16 0.13 0.10 0.06 0.02 29.7 28.7 28.7 27.6 27.7 26.6 26.6 25.7 25.6 24.6 24.6 23.6 23.6 0.42 0.42 0.42 0.43 0.43 0.43 0.43 0.44 0.44 0.44 0.44 0.44 0.44 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 36.86 0.00 35.56 0.00 33.71 0.00 31.89 0.00 29.52 0.00 27.16 0.00 24.31 0.00 21.38 0.00 18.01 0.00 14.52 0.00 10.67 0.00 6.59 0.00 2.21 0.00 X -S Area: 9.28 Path Length: 18.38 X -S Weight: 1021.15 64.52 62.30 59.06 55.96 51.77 47.73 42.71 37.63 31.71 25.61 18.83 11.66 3.91 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.86 0.86 DATA: Analysis 2 - Mining Condition Material Properties (4 materials) Material: 1 (Mohr -Coulomb Isotropic) - Sand and gravel, mixed grain size Cohesion Phi UnitWeight Ru 0.00 45.0 110.00 Auto Material: 2 (Mohr -Coulomb Isotropic) - OB - loose sand, mixed grain size Cohesion Phi UnitWeight Ru 0.00 34.0 99.00 Auto Material: 3 (Mohr -Coulomb Isotropic) - Bedrock - claystone Cohesion Phi UnitWeight Ru 20000.00 25.0 110.00 Auto Material: 4 (Mohr -Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 0.0 112.00 Auto Saturated: 0.00 0.0 115.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 0.000 Material Profiles (4 profiles) Profile: 1 (2 points) Material beneath: 2 - OB - loose sand, mixed grain size 0.00 4900.00 300.00 4900.00 Profile: 2 (2 points) Material beneath: 1 - Sand and gravel, mixed grain size 0.00 4897.00 300.00 4897.00 Profile: 3 (2 points) Material beneath: 3 - Bedrock - claystone 0.00 4850.00 300.00 4850.00 Profile: 4 (5 points) Material within: 4 - Slurry Wall 65.00 4895.00 70.00 4895.00 70.00 4845.00 65.00 4845.00 65.00 4895.00 Slope Surface (4 points) 1.00 4897.00 100.00 4897.00 139.00 4872.00 300.00 4872.00 Phreatic Surface (2 points) 0.00 4895.00 66.00 4895.00 Piezometric Surfaces (1 surface) Failure Surface (Critical, from previous analysis) Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 113.40 YL: 4888.41 XR: 128.80 YR: 4878.54 Centre: XC: 150.50 YC: 4929.35 Radius: R: 55.25 Earthquake Force Pseudo -static earthquake (seismic) coefficient: 0.050 Variable Restraints Parameter descriptor: XL XR R Range of variation: 25.00 20.00 10.50 Trial positions within range: 10 10 10 RESULTS: Analysis 2 - Mining Condition Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Factor of Safety for initial failure surface approximation: 1.423 There were: 881 successful analyses from a total of 1001 trial surfaces 120 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.40 Results Summary - Lowest 99 Factor of Safety circles Circle X -Left Y -Left X -Right Y -Right X -Centre Y -Centre Radius FoS 1 120.34 4883.96 123.24 4882.10 151.91 4930.01 55.83 1.401 <-- Critical Surface 2 120.34 4883.96 123.24 4882.10 153.17 4931.98 58.17 1.401 3 120.34 4883.96 123.24 4882.10 151.28 4929.03 54.67 1.401 4 120.34 4883.96 123.24 4882.10 152.54 4931.00 57.00 1.401 5 120.34 4883.96 123.24 4882.10 154.43 4933.94 60.50 1.401 6 120.34 4883.96 123.24 4882.10 153.80 4932.96 59.33 1.401 7 117.57 4885.74 121.02 4883.52 151.29 4934.56 59.33 1.401 8 120.34 4883.96 123.24 4882.10 149.39 4926.08 51.17 1.401 9 117.57 4885.74 121.02 4883.52 151.92 4935.54 60.50 1.401 10 120.34 4883.96 123.24 4882.10 150.65 4928.05 53.50 1.401 11 120.34 4883.96 123.24 4882.10 150.02 4927.06 52.33 1.401 12 117.57 4885.74 121.02 4883.52 150.66 4933.57 58.17 1.401 13 117.57 4885.74 121.02 4883.52 150.03 4932.59 57.00 1.401 14 117.57 4885.74 121.02 4883.52 148.77 4930.62 54.67 1.401 15 120.34 4883.96 123.24 4882.10 148.76 4925.10 50.00 1.401 16 117.57 4885.74 121.02 4883.52 148.14 4929.64 53.50 1.401 17 117.57 4885.74 121.02 4883.52 149.40 4931.61 55.83 1.401 18 125.90 4880.40 129.91 4877.83 160.53 4930.01 60.50 1.402 19 117.57 4885.74 121.02 4883.52 147.51 4928.66 52.33 1.402 20 117.57 4885.74 121.02 4883.52 146.25 4926.69 50.00 1.402 21 114.79 4887.52 118.80 4884.95 148.79 4936.15 59.33 1.402 22 117.57 4885.74 121.02 4883.52 146.88 4927.67 51.17 1.402 23 125.90 4880.40 129.91 4877.83 159.90 4929.02 59.33 1.402 24 114.79 4887.52 118.80 4884.95 149.42 4937.13 60.50 1.402 25 125.90 4880.40 129.91 4877.83 159.27 4928.04 58.17 1.402 26 114.79 4887.52 118.80 4884.95 148.16 4935.16 58.17 1.402 27 125.90 4880.40 129.91 4877.83 158.01 4926.07 55.83 1.402 28 114.79 4887.52 118.80 4884.95 146.27 4932.21 54.67 1.402 29 125.90 4880.40 129.91 4877.83 158.64 4927.06 57.00 1.402 30 114.79 4887.52 118.80 4884.95 146.90 4933.20 55.83 1.402 31 114.79 4887.52 118.80 4884.95 147.53 4934.18 57.00 1.402 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 125.90 125.90 114.79 114.79 123.12 114.79 123.12 125.90 123.12 125.90 123.12 114.79 125.90 123.12 123.12 123.12 120.34 120.34 123.12 120.34 123.12 120.34 120.34 123.12 120.34 117.57 120.34 117.57 117.57 120.34 117.57 120.34 125.90 4880.40 4880.40 4887.52 4887.52 4882.18 4887.52 4882.18 4880.40 4882.18 4880.40 4882.18 4887.52 4880.40 4882.18 4882.18 4882.18 4883.96 4883.96 4882.18 4883.96 4882.18 4883.96 4883.96 4882.18 4883.96 4885.74 4883.96 4885.74 4885.74 4883.96 4885.74 4883.96 4880.40 129.91 129.91 118.80 118.80 127.69 118.80 127.69 129.91 127.69 129.91 127.69 118.80 129.91 127.69 127.69 127.69 125.47 125.47 127.69 125.47 127.69 125.47 125.47 127.69 125.47 123.24 125.47 123.24 123.24 125.47 123.24 125.47 132.13 4877.83 4877.83 4884.95 4884.95 4879.25 4884.95 4879.25 4877.83 4879.25 4877.83 4879.25 4884.95 4877.83 4879.25 4879.25 4879.25 4880.68 4880.68 4879.25 4880.68 4879.25 4880.68 4880.68 4879.25 4880.68 4882.10 4880.68 4882.10 4882.10 4880.68 4882.10 4880.68 4876.40 157.38 156.75 145.64 145.01 158.03 144.38 157.40 156.12 156.76 155.49 156.13 143.75 154.86 154.87 155.50 154.24 155.51 154.88 153.61 154.25 152.98 153.62 152.99 152.35 152.36 153.00 151.73 152.37 151.74 151.10 151.11 150.47 161.60 4925.09 4924.11 4931.23 4930.25 4931.59 4929.26 4930.61 4923.12 4929.63 4922.14 4928.65 4928.28 4921.16 4926.68 4927.66 4925.70 4933.19 4932.20 4924.71 4931.22 4923.73 4930.24 4929.25 4922.74 4928.27 4934.77 4927.29 4933.79 4932.81 4926.30 4931.82 4925.32 4929.24 54.67 53.50 53.50 52.33 60.50 51.17 59.33 52.33 58.17 51.17 57.00 50.00 50.00 54.67 55.83 53.50 60.50 59.33 52.33 58.17 51.17 57.00 55.83 50.00 54.67 60.50 53.50 59.33 58.17 52.33 57.00 51.17 60.50 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 114.79 117.57 120.34 117.57 117.57 125.90 114.79 125.90 114.79 117.57 125.90 114.79 114.79 117.57 125.90 123.12 112.01 117.57 123.12 125.90 114.79 112.01 123.12 112.01 125.90 114.79 123.12 114.79 112.01 125.90 123.12 112.01 125.90 4887.52 4885.74 4883.96 4885.74 4885.74 4880.40 4887.52 4880.40 4887.52 4885.74 4880.40 4887.52 4887.52 4885.74 4880.40 4882.18 4889.30 4885.74 4882.18 4880.40 4887.52 4889.30 4882.18 4889.30 4880.40 4887.52 4882.18 4887.52 4889.30 4880.40 4882.18 4889.30 4880.40 121.02 123.24 125.47 123.24 123.24 132.13 121.02 132.13 121.02 123.24 132.13 121.02 121.02 123.24 132.13 129.91 118.80 123.24 129.91 132.13 121.02 118.80 129.91 118.80 132.13 121.02 129.91 121.02 118.80 132.13 129.91 118.80 132.13 4883.52 4882.10 4880.68 4882.10 4882.10 4876.40 4883.52 4876.40 4883.52 4882.10 4876.40 4883.52 4883.52 4882.10 4876.40 4877.83 4884.95 4882.10 4877.83 4876.40 4883.52 4884.95 4877.83 4884.95 4876.40 4883.52 4877.83 4883.52 4884.95 4876.40 4877.83 4884.95 4876.40 150.49 150.48 149.84 149.85 149.22 160.97 149.86 160.34 149.23 148.59 159.71 148.60 147.97 147.96 159.08 159.09 147.98 147.33 158.46 158.45 147.34 147.35 157.83 146.72 157.82 146.71 157.20 146.08 146.09 157.19 156.57 145.46 156.56 4936.36 4930.84 4924.33 4929.85 4928.87 4928.25 4935.38 4927.27 4934.39 4927.89 4926.29 4933.41 4932.42 4926.90 4925.30 4930.82 4937.94 4925.92 4929.84 4924.32 4931.44 4936.96 4928.85 4935.98 4923.33 4930.46 4927.87 4929.47 4934.99 4922.35 4926.88 4934.01 4921.36 60.50 55.83 50.00 54.67 53.50 59.33 59.33 58.17 58.17 52.33 57.00 57.00 55.83 51.17 55.83 60.50 60.50 50.00 59.33 54.67 54.67 59.33 58.17 58.17 53.50 53.50 57.00 52.33 57.00 52.33 55.83 55.83 51.17 1.403 1.403 1.403 1.403 1.403 1.403 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.405 1.405 1.405 98 120.34 4883.96 127.69 4879.25 156.58 4932.41 60.50 1.405 99 114.79 4887.52 121.02 4883.52 145.45 4928.49 51.17 1.405 Critical Failure Surface (circle 1) Intersects: XL: 120.34 YL: 4883.96 XR: 123.24 YR: 4882.10 Centre: XC: 151.91 YC: 4930.01 Radius: R: 55.83 Generated failure surface: (20 points) 120.34 4883.96 120.49 4883.86 120.64 4883.75 120.79 4883.65 120.95 4883.55 121.10 4883.45 121.25 4883.35 121.40 4883.25 121.55 4883.15 121.70 4883.06 121.86 4882.96 122.01 4882.86 122.16 4882.76 122.32 4882.67 122.47 4882.57 122.62 4882.48 122.78 4882.38 122.93 4882.29 123.09 4882.19 123.24 4882.10 Slice Geometry and Properties - Critical Failure Surface (circle 1, 38 slices) Slice X -S Base PoreWater Normal Test X -Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 120.34 0.00 34.4 0.07 0.09 1 0.00 45.0 0.02 0.00 0.14 0.81 2 120.42 0.00 34.4 0.07 0.09 1 0.00 45.0 0.04 0.00 0.36 0.81 3 120.49 0.00 34.1 0.08 0.09 1 0.00 45.0 0.07 0.00 0.62 0.81 4 120.57 0.00 34.1 0.08 0.09 1 0.00 45.0 0.09 0.00 0.80 0.81 5 120.64 0.00 33.8 0.08 0.09 1 0.00 45.0 0.11 0.00 0.98 0.81 6 120.72 0.00 34.0 0.08 0.09 1 0.00 45.0 0.13 0.00 1.16 0.81 7 120.79 0.00 34.0 0.08 0.09 1 0.00 45.0 0.15 0.00 1.34 0.81 8 120.87 0.00 33.7 0.08 0.09 1 0.00 45.0 0.17 0.00 1.49 0.81 9 120.95 0.00 33.4 0.08 0.09 1 0.00 45.0 0.18 0.00 1.64 0.81 10 121.02 0.00 33.7 0.08 0.09 1 0.00 45.0 0.20 0.00 1.78 0.81 11 121.10 0.00 33.6 0.08 0.09 1 0.00 45.0 0.21 0.00 1.89 0.81 12 121.17 0.00 33.4 0.08 0.09 1 0.00 45.0 0.22 0.00 2.01 0.81 13 121.25 0.00 33.0 0.08 0.09 1 0.00 45.0 0.24 0.00 2.13 0.81 14 121.32 0.00 33.3 0.08 0.09 1 0.00 45.0 0.24 0.00 2.16 0.81 15 121.40 0.00 33.2 0.08 0.09 1 0.00 45.0 0.25 0.00 2.23 0.81 16 121.48 0.00 33.0 0.08 0.09 1 0.00 45.0 0.26 0.00 2.31 0.81 17 121.55 0.00 32.9 0.08 0.09 1 0.00 45.0 0.26 0.00 2.35 0.81 18 121.63 0.00 32.7 0.08 0.09 1 0.00 45.0 0.27 0.00 2.40 0.81 19 121.70 0.00 32.6 0.08 0.09 1 0.00 45.0 0.27 0.00 2.40 0.81 20 121.78 0.00 32.6 0.08 0.09 1 0.00 45.0 0.26 0.00 2.36 0.81 21 121.86 0.00 32.6 0.08 0.09 1 0.00 45.0 0.26 0.00 2.36 0.82 22 121.93 0.00 32.6 0.08 0.09 1 0.00 45.0 0.26 0.00 2.36 0.82 23 122.01 0.00 32.2 0.08 0.09 1 0.00 45.0 0.26 0.00 2.30 0.82 24 122.09 0.00 32.2 0.08 0.09 1 0.00 45.0 0.26 0.00 2.30 0.82 25 122.16 0.00 32.2 0.08 0.09 1 0.00 45.0 0.24 0.00 2.19 0.82 26 122.24 0.00 32.2 0.08 0.09 1 0.00 45.0 0.24 0.00 2.15 0.82 27 122.32 0.00 31.9 0.08 0.09 1 0.00 45.0 0.23 0.00 2.05 0.82 28 122.39 0.00 31.9 0.08 0.09 1 0.00 45.0 0.21 0.00 1.93 0.82 29 122.47 0.00 31.8 0.08 0.09 1 0.00 45.0 0.20 0.00 1.82 0.82 30 122.55 0.00 31.6 0.08 0.09 1 0.00 45.0 0.19 0.00 1.68 0.82 31 122.62 0.00 31.5 0.08 0.09 1 0.00 45.0 0.17 0.00 1.53 0.82 32 122.70 0.00 31.5 0.08 0.09 1 0.00 45.0 0.15 0.00 1.35 0.82 33 122.78 0.00 31.5 0.08 0.09 1 0.00 45.0 0.13 0.00 1.20 0.82 34 122.86 0.00 31.5 0.08 0.09 1 0.00 45.0 0.11 0.00 1.01 0.82 35 122.93 0.00 31.1 0.08 0.09 1 0.00 45.0 0.09 0.00 0.83 0.82 36 123.01 0.00 31.1 0.08 0.09 1 0.00 45.0 0.07 0.00 0.60 0.82 37 123.09 0.00 30.8 0.08 0.09 1 0.00 45.0 0.04 0.00 0.38 0.82 38 123.17 0.00 31.1 0.08 0.09 1 0.00 45.0 0.01 0.00 0.11 0.82 X -S Area: 0.06 Path Length: 3.45 X -S Weight: 6.75 DATA: Analysis 3 - Reclaimed Condition Material Properties (4 materials) Material: 1 (Mohr -Coulomb Isotropic) - Sand and gravel, mixed grain size Cohesion Phi UnitWeight Ru 0.00 45.0 110.00 Auto Material: 2 (Mohr -Coulomb Isotropic) - OB - loose sand, mixed grain size Cohesion Phi UnitWeight Ru 0.00 34.0 99.00 Auto Material: 3 (Mohr -Coulomb Isotropic) - Bedrock - claystone Cohesion Phi UnitWeight Ru 20000.00 25.0 110.00 Auto Material: 4 (Mohr -Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 0.0 112.00 Auto Saturated: 0.00 0.0 115.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 0.000 Material Profiles (4 profiles) Profile: 1 (2 points) Material beneath: 2 - OB - loose sand, mixed grain size 0.00 4900.00 300.00 4900.00 Profile: 2 (2 points) Material beneath: 1 - Sand and gravel, mixed grain size 0.00 4897.00 300.00 4897.00 Profile: 3 (2 points) Material beneath: 3 - Bedrock - claystone 0.00 4850.00 300.00 4850.00 Profile: 4 (5 points) Material within: 4 - Slurry Wall 65.00 4895.00 70.00 4895.00 70.00 4845.00 65.00 4845.00 65.00 4895.00 Slope Surface (4 points) 1.00 4897.00 100.00 4897.00 175.00 4872.00 300.00 4872.00 Phreatic Surface (2 points) 0.00 4895.00 66.00 4895.00 Piezometric Surfaces (1 surface) Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 100.10 YL: 4896.97 XR: 149.10 YR: 4880.63 Centre: XC: 146.87 YC: 4955.60 Radius: R: 75.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 25.00 25.00 20.00 Trial positions within range: 20 20 10 RESULTS: Analysis 3 - Reclaimed Condition Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Factor of Safety for initial failure surface approximation: 3.170 There were: 4001 successful analyses from a total of 4001 trial surfaces Critical (minimum) Factor of Safety: 3.03 Results Summary - Lowest 99 Factor of Safety circles Circle X -Left Y -Left X -Right Y -Right X -Centre Y -Centre Radius FoS 1 112.60 4892.80 136.60 4884.80 151.18 4968.54 85.00 3.030 <-- Critical Surface 2 112.60 4892.80 136.60 4884.80 150.47 4966.41 82.78 3.032 3 112.60 4892.80 137.92 4884.36 151.80 4968.22 85.00 3.033 4 111.28 4893.24 136.60 4884.80 150.49 4968.66 85.00 3.033 5 112.60 4892.80 136.60 4884.80 149.76 4964.27 80.56 3.033 6 112.60 4892.80 137.92 4884.36 151.09 4966.08 82.78 3.035 7 111.28 4893.24 136.60 4884.80 149.78 4966.52 82.78 3.035 8 112.60 4892.80 136.60 4884.80 149.05 4962.14 78.33 3.035 9 109.97 4893.68 136.60 4884.80 149.80 4968.77 85.00 3.037 10 111.28 4893.24 137.92 4884.36 151.11 4968.33 85.00 3.037 11 112.60 4892.80 139.23 4883.92 152.43 4967.89 85.00 3.037 12 111.28 4893.24 136.60 4884.80 149.07 4964.39 80.56 3.037 13 112.60 4892.80 137.92 4884.36 150.38 4963.95 80.56 3.037 14 112.60 4892.80 136.60 4884.80 148.33 4960.00 76.11 3.038 15 112.60 4892.80 139.23 4883.92 151.71 4965.75 82.78 3.039 16 111.28 4893.24 137.92 4884.36 150.40 4966.19 82.78 3.039 17 109.97 4893.68 136.60 4884.80 149.08 4966.63 82.78 3.039 18 111.28 4893.24 136.60 4884.80 148.35 4962.25 78.33 3.039 19 112.60 4892.80 137.92 4884.36 149.67 4961.81 78.33 3.039 20 112.60 4892.80 136.60 4884.80 147.62 4957.86 73.89 3.040 21 109.97 4893.68 137.92 4884.36 150.42 4968.44 85.00 3.041 22 111.28 4893.24 139.23 4883.92 151.73 4968.00 85.00 3.041 23 108.65 4894.12 136.60 4884.80 149.10 4968.88 85.00 3.041 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 112.60 112.60 111.28 109.97 112.60 111.28 112.60 108.65 111.28 109.97 112.60 112.60 109.97 111.28 112.60 111.28 111.28 109.97 107.34 108.65 112.60 112.60 108.65 109.97 111.28 112.60 112.60 111.28 109.97 111.28 112.60 111.28 109.97 4892.80 4892.80 4893.24 4893.68 4892.80 4893.24 4892.80 4894.12 4893.24 4893.68 4892.80 4892.80 4893.68 4893.24 4892.80 4893.24 4893.24 4893.68 4894.55 4894.12 4892.80 4892.80 4894.12 4893.68 4893.24 4892.80 4892.80 4893.24 4893.68 4893.24 4892.80 4893.24 4893.68 140.55 139.23 137.92 136.60 137.92 136.60 136.60 136.60 139.23 137.92 140.55 139.23 136.60 137.92 137.92 136.60 140.55 139.23 136.60 137.92 141.86 136.60 136.60 137.92 139.23 140.55 139.23 137.92 136.60 136.60 137.92 140.55 139.23 4883.48 4883.92 4884.36 4884.80 4884.36 4884.80 4884.80 4884.80 4883.92 4884.36 4883.48 4883.92 4884.80 4884.36 4884.36 4884.80 4883.48 4883.92 4884.80 4884.36 4883.05 4884.80 4884.80 4884.36 4883.92 4883.48 4883.92 4884.36 4884.80 4884.80 4884.36 4883.48 4883.92 153.05 151.00 149.68 148.37 148.95 147.64 146.91 148.39 151.02 149.70 152.33 150.29 147.66 148.97 148.24 146.92 152.35 151.03 148.40 149.72 153.66 146.19 147.67 148.99 150.30 151.62 149.57 148.26 146.94 146.21 147.52 151.63 150.32 4967.56 4963.61 4964.05 4964.49 4959.67 4960.11 4955.72 4966.73 4965.86 4966.30 4965.42 4961.47 4962.35 4961.91 4957.53 4957.96 4967.66 4968.10 4968.98 4968.54 4967.22 4953.58 4964.59 4964.15 4963.71 4963.28 4959.33 4959.77 4960.21 4955.82 4955.38 4965.52 4965.96 85.00 80.56 80.56 80.56 76.11 76.11 71.67 82.78 82.78 82.78 82.78 78.33 78.33 78.33 73.89 73.89 85.00 85.00 85.00 85.00 85.00 69.44 80.56 80.56 80.56 80.56 76.11 76.11 76.11 71.67 71.67 82.78 82.78 3.041 3.041 3.041 3.041 3.042 3.042 3.042 3.043 3.043 3.043 3.043 3.044 3.044 3.044 3.044 3.044 3.045 3.045 3.045 3.045 3.045 3.045 3.045 3.045 3.046 3.046 3.046 3.046 3.046 3.047 3.047 3.047 3.047 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 112.60 107.34 108.65 108.65 111.28 109.97 112.60 112.60 112.60 108.65 109.97 107.34 111.28 106.02 111.28 109.97 112.60 108.65 107.34 111.28 109.97 112.60 111.28 112.60 111.28 109.97 108.65 112.60 109.97 108.65 112.60 111.28 106.02 4892.80 4894.55 4894.12 4894.12 4893.24 4893.68 4892.80 4892.80 4892.80 4894.12 4893.68 4894.55 4893.24 4894.99 4893.24 4893.68 4892.80 4894.12 4894.55 4893.24 4893.68 4892.80 4893.24 4892.80 4893.24 4893.68 4894.12 4892.80 4893.68 4894.12 4892.80 4893.24 4894.99 141.86 136.60 137.92 136.60 139.23 137.92 140.55 136.60 143.18 139.23 140.55 137.92 141.86 136.60 137.92 136.60 139.23 137.92 136.60 140.55 139.23 141.86 136.60 137.92 139.23 137.92 136.60 140.55 140.55 139.23 136.60 141.86 136.60 4883.05 4884.80 4884.36 4884.80 4883.92 4884.36 4883.48 4884.80 4882.61 4883.92 4883.48 4884.36 4883.05 4884.80 4884.36 4884.80 4883.92 4884.36 4884.80 4883.48 4883.92 4883.05 4884.80 4884.36 4883.92 4884.36 4884.80 4883.48 4883.48 4883.92 4884.80 4883.05 4884.80 152.95 147.69 149.00 146.96 149.59 148.27 150.90 145.48 154.28 150.33 151.65 149.02 152.97 147.70 147.54 146.23 148.86 148.29 146.97 150.92 149.60 152.23 145.49 146.81 148.87 147.56 146.24 150.19 150.93 149.62 144.76 152.25 146.99 4965.08 4966.83 4966.39 4962.45 4961.57 4962.01 4961.13 4951.43 4966.88 4968.19 4967.76 4968.63 4967.32 4969.07 4957.62 4958.06 4957.18 4964.25 4964.69 4963.37 4963.81 4962.93 4953.67 4953.23 4959.42 4959.86 4960.30 4958.98 4965.61 4966.05 4949.29 4965.17 4966.92 82.78 82.78 82.78 78.33 78.33 78.33 78.33 67.22 85.00 85.00 85.00 85.00 85.00 85.00 73.89 73.89 73.89 80.56 80.56 80.56 80.56 80.56 69.44 69.44 76.11 76.11 76.11 76.11 82.78 82.78 65.00 82.78 82.78 3.047 3.047 3.047 3.048 3.048 3.048 3.048 3.048 3.049 3.049 3.049 3.049 3.049 3.049 3.049 3.049 3.049 3.050 3.050 3.050 3.050 3.050 3.050 3.050 3.051 3.051 3.051 3.051 3.052 3.052 3.052 3.052 3.052 90 91 92 93 94 95 96 97 98 99 107.34 112.60 109.97 112.60 111.28 109.97 108.65 111.28 112.60 107.34 4894.55 4892.80 4893.68 4892.80 4893.24 4893.68 4894.12 4893.24 4892.80 4894.55 137.92 143.18 136.60 139.23 137.92 139.23 137.92 140.55 141.86 136.60 Critical Failure Surface (circle 1) 4884.36 4882.61 4884.80 4883.92 4884.36 4883.92 4884.36 4883.48 4883.05 4884.80 148.30 153.56 145.51 148.14 146.82 148.89 147.57 150.20 151.52 146.25 4966.48 4964.73 4955.91 4955.03 4955.47 4961.66 4962.10 4961.22 4960.78 4962.54 82.78 82.78 71.67 71.67 71.67 78.33 78.33 78.33 78.33 78.33 Intersects: XL: 112.60 YL: 4892.80 XR: 136.60 YR: 4884.80 Centre: XC: 151.18 YC: 4968.54 Radius: R: 85.00 Generated failure surface: (20 points) 112.60 4890.52 118.67 4888.12 124.94 4886.20 131.37 4884.80 4892.80 4890.00 4887.69 4885.88 113.80 4892.20 119.91 4889.50 126.21 4887.29 132.67 4885.58 115.00 4891.62 121.15 4889.02 127.49 4886.91 133.97 4885.30 3.052 3.052 3.052 3.052 3.052 3.053 3.053 3.053 3.053 3.053 116.21 4891.06 122.41 4888.56 128.78 4886.55 135.29 4885.04 Slice Geometry and Properties - Critical Failure Surface (circle 1, 38 slices) Slice X -S Base X -Left Area Angle Width Length Matl Cohesion Phi Factor PoreWater 117.44 123.67 130.07 136.60 Normal Test Weight Force Stress 1 112.60 0.03 26.6 0.60 0.67 1 0.00 45.0 3.28 0.00 2 113.20 0.09 26.5 0.60 0.67 1 0.00 45.0 9.79 0.00 3 113.80 0.15 25.6 0.60 0.67 1 0.00 45.0 16.11 0.00 4 114.40 0.20 25.6 0.60 0.67 1 0.00 45.0 21.94 0.00 4.70 0.96 14.07 0.96 23.09 0.96 31.44 0.96 5 115.00 0.25 24.8 0.61 0.67 1 0.00 45.0 27.67 0.00 39.58 0.96 6 115.61 0.30 24.8 0.61 0.67 1 0.00 45.0 32.79 0.00 46.90 0.96 7 116.21 0.34 23.8 0.61 0.67 1 0.00 45.0 37.88 0.00 54.10 0.95 8 116.83 0.38 23.8 0.61 0.67 1 0.00 45.0 42.32 0.00 60.42 0.95 9 117.44 0.43 22.9 0.62 0.67 1 0.00 45.0 46.77 0.00 66.69 0.95 10 118.05 0.46 23.0 0.62 0.67 1 0.00 45.0 50.47 0.00 71.95 0.95 11 118.67 0.49 22.1 0.62 0.67 1 0.00 45.0 54.23 0.00 77.22 0.95 12 119.29 0.52 22.0 0.62 0.67 1 0.00 45.0 57.22 0.00 81.50 0.95 13 119.91 0.55 21.1 0.62 0.67 1 0.00 45.0 60.26 0.00 85.75 0.95 14 120.53 0.57 21.2 0.62 0.67 1 0.00 45.0 62.53 0.00 88.97 0.95 15 121.15 0.59 20.3 0.63 0.67 1 0.00 45.0 64.82 0.00 92.17 0.95 16 121.78 0.60 20.2 0.63 0.67 1 0.00 45.0 66.34 0.00 94.34 0.95 17 122.41 0.62 19.3 0.63 0.67 1 0.00 45.0 67.87 0.00 96.47 0.95 18 123.04 0.62 19.3 0.63 0.67 1 0.00 45.0 68.61 0.00 97.53 0.95 19 123.67 0.63 18.4 0.63 0.67 1 0.00 45.0 69.39 0.00 98.61 0.95 20 124.30 0.63 18.4 0.63 0.67 1 0.00 45.0 69.39 0.00 98.63 0.95 21 124.94 0.63 17.6 0.64 0.67 1 0.00 45.0 69.34 0.00 98.53 0.95 22 125.57 0.62 17.5 0.64 0.67 1 0.00 45.0 68.58 0.00 97.48 0.95 23 126.21 0.62 16.6 0.64 0.67 1 0.00 45.0 67.75 0.00 96.33 0.95 24 126.85 0.60 16.6 0.64 0.67 1 0.00 45.0 66.16 0.00 94.06 0.95 25 127.49 0.59 15.7 0.64 0.67 1 0.00 45.0 64.53 0.00 91.80 0.95 26 128.13 0.57 15.8 0.64 0.67 1 0.00 45.0 62.18 0.00 88.44 0.95 27 128.78 0.54 14.8 0.65 0.67 1 0.00 45.0 59.71 0.00 85.01 0.95 28 129.42 0.51 14.8 0.65 0.67 1 0.00 45.0 56.55 0.00 80.52 0.95 29 130.07 0.48 13.9 0.65 0.67 1 0.00 45.0 53.23 0.00 75.87 0.95 30 130.72 0.45 14.0 0.65 0.67 1 0.00 45.0 49.26 0.00 70.19 0.95 31 131.37 0.41 13.0 0.65 0.67 1 0.00 45.0 45.07 0.00 64.31 0.95 32 132.02 0.37 13.0 0.65 0.67 1 0.00 45.0 40.35 0.00 57.59 0.95 33 132.67 0.32 12.1 0.65 0.67 1 0.00 45.0 35.34 0.00 50.50 0.96 34 133.32 0.27 12.1 0.65 0.67 1 0.00 45.0 29.76 0.00 42.54 0.96 35 133.97 0.22 11.2 0.66 0.67 1 0.00 45.0 23.87 0.00 34.18 0.96 36 134.63 0.16 11.2 0.66 0.67 1 0.00 45.0 17.53 0.00 25.10 0.96 37 135.29 0.10 10.3 0.66 0.67 1 0.00 45.0 10.80 0.00 15.50 0.96 38 135.94 0.03 10.4 0.66 0.67 1 0.00 45.0 3.60 0.00 5.17 0.96 X -S Area: 15.94 Path Length: 25.39 X -S Weight: 1753.30 DATA: Analysis 4 - Reclaimed Condition Material Properties (4 materials) Material: 1 (Mohr -Coulomb Isotropic) - Sand and gravel, mixed grain size Cohesion Phi UnitWeight Ru 0.00 45.0 110.00 Auto Material: 2 (Mohr -Coulomb Isotropic) - OB - loose sand, mixed grain size Cohesion Phi UnitWeight Ru 0.00 34.0 99.00 Auto Material: 3 (Mohr -Coulomb Isotropic) - Bedrock - claystone Cohesion Phi UnitWeight Ru 20000.00 25.0 110.00 Auto Material: 4 (Mohr -Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 0.0 112.00 Auto Saturated: 0.00 0.0 115.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 0.000 Material Profiles (4 profiles) Profile: 1 (2 points) Material beneath: 2 - OB - loose sand, mixed grain size 0.00 4900.00 300.00 4900.00 Profile: 2 (2 points) Material beneath: 1 - Sand and gravel, mixed grain size 0.00 4897.00 300.00 4897.00 Profile: 3 (2 points) Material beneath: 3 - Bedrock - claystone 0.00 4850.00 300.00 4850.00 Profile: 4 (5 points) Material within: 4 - Slurry Wall 65.00 4895.00 70.00 4895.00 70.00 4845.00 65.00 4845.00 65.00 4895.00 Slope Surface (4 points) 1.00 4897.00 100.00 4897.00 175.00 4872.00 300.00 4872.00 Phreatic Surface (2 points) 0.00 4895.00 66.00 4895.00 Piezometric Surfaces (1 surface) Failure Surface (Critical, from previous analysis) Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 112.60 YL: 4892.80 XR: 136.60 YR: 4884.80 Centre: XC: 151.18 YC: 4968.54 Radius: R: 85.00 Earthquake Force Pseudo -static earthquake (seismic) coefficient: 0.050 Variable Restraints Parameter descriptor: XL XR R Range of variation: 25.00 25.00 20.00 Trial positions within range: 20 20 10 RESULTS: Analysis 4 - Reclaimed Condition Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Factor of Safety for initial failure surface approximation: 2.592 There were: 3896 successful analyses from a total of 4001 trial surfaces 105 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.57 Results Summary - Lowest 99 Factor of Safety circles Circle X -Left 1 121.15 Surface 2 122.47 3 121.15 4 122.47 5 122.47 6 122.47 7 122.47 8 121.15 9 119.84 10 123.78 Y -Left X -Right Y -Right X -Centre Y -Centre Radius FoS 4889.95 125.42 4888.53 4889.51 4889.95 4889.51 4889.51 4889.51 4889.51 4889.95 4890.39 4889.07 126.73 125.42 126.73 126.73 126.73 126.73 125.42 124.10 128.05 4888.09 4888.53 4888.09 4888.09 4888.09 4888.09 4888.53 4888.97 4887.65 153.32 4979.34 154.64 152.62 152.53 153.23 151.83 153.94 151.21 149.19 151.73 4978.90 4977.23 4972.57 4974.68 4970.46 4976.79 4973.01 4971.34 4965.81 95.00 2.565 <-- Critical 95.00 92.78 88.33 90.56 86.11 92.78 88.33 86.11 81.67 2.565 2.565 2.566 2.566 2.566 2.566 2.566 2.566 2.566 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 125.10 119.84 121.15 125.10 123.78 123.78 125.10 119.84 122.47 123.78 123.78 122.47 121.15 121.15 119.84 125.10 122.47 121.15 125.10 122.47 125.10 121.15 121.15 121.15 121.15 123.78 119.84 123.78 123.78 123.78 118.52 125.10 125.10 4888.63 4890.39 4889.95 4888.63 4889.07 4889.07 4888.63 4890.39 4889.51 4889.07 4889.07 4889.51 4889.95 4889.95 4890.39 4888.63 4889.51 4889.95 4888.63 4889.51 4888.63 4889.95 4889.95 4889.95 4889.95 4889.07 4890.39 4889.07 4889.07 4889.07 4890.83 4888.63 4888.63 129.36 124.10 125.42 129.36 128.05 128.05 130.68 124.10 126.73 128.05 128.05 126.73 125.42 125.42 124.10 129.36 126.73 125.42 129.36 126.73 129.36 125.42 125.42 126.73 125.42 128.05 125.42 128.05 128.05 129.36 124.10 129.36 129.36 4887.21 4888.97 4888.53 4887.21 4887.65 4887.65 4886.77 4888.97 4888.09 4887.65 4887.65 4888.09 4888.53 4888.53 4888.97 4887.21 4888.09 4888.53 4887.21 4888.09 4887.21 4888.53 4888.53 4888.09 4888.53 4887.65 4888.53 4887.65 4887.65 4887.21 4888.97 4887.21 4887.21 155.86 147.78 151.92 156.56 153.84 155.95 157.92 148.48 148.31 149.62 154.54 150.42 148.40 150.51 147.08 153.04 151.12 149.11 154.45 149.72 155.15 147.70 147.00 153.97 149.81 150.32 152.66 155.24 152.43 153.08 150.63 153.75 152.34 4973.81 4967.12 4975.12 4975.91 4972.14 4978.46 4977.78 4969.23 4959.92 4959.48 4974.24 4966.24 4964.57 4970.90 4965.02 4965.37 4968.35 4966.68 4969.59 4964.14 4971.70 4962.47 4960.36 4979.10 4968.79 4961.59 4979.54 4976.35 4967.92 4967.68 4977.87 4967.48 4963.26 90.56 81.67 90.56 92.78 88.33 95.00 95.00 83.89 75.00 75.00 90.56 81.67 79.44 86.11 79.44 81.67 83.89 81.67 86.11 79.44 88.33 77.22 75.00 95.00 83.89 77.22 95.00 92.78 83.89 83.89 92.78 83.89 79.44 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 123.78 123.78 122.47 119.84 122.47 118.52 121.15 121.15 122.47 119.84 118.52 119.84 123.78 121.15 122.47 125.10 125.10 123.78 125.10 123.78 122.47 123.78 119.84 119.84 122.47 123.78 118.52 125.10 122.47 123.78 121.15 122.47 123.78 4889.07 4889.07 4889.51 4890.39 4889.51 4890.83 4889.95 4889.95 4889.51 4890.39 4890.83 4890.39 4889.07 4889.95 4889.51 4888.63 4888.63 4889.07 4888.63 4889.07 4889.51 4889.07 4890.39 4890.39 4889.51 4889.07 4890.83 4888.63 4889.51 4889.07 4889.95 4889.51 4889.07 129.36 128.05 126.73 124.10 128.05 124.10 126.73 126.73 128.05 125.42 124.10 124.10 129.36 126.73 128.05 130.68 130.68 128.05 130.68 129.36 128.05 129.36 125.42 125.42 128.05 129.36 124.10 130.68 128.05 129.36 126.73 128.05 129.36 4887.21 4887.65 4888.09 4888.97 4887.65 4888.97 4888.09 4888.09 4887.65 4888.53 4888.97 4888.97 4887.21 4888.09 4887.65 4886.77 4886.77 4887.65 4886.77 4887.21 4887.65 4887.21 4888.53 4888.53 4887.65 4887.21 4888.97 4886.77 4887.65 4887.21 4888.09 4887.65 4887.21 155.89 153.13 149.01 145.67 153.18 148.52 151.86 153.27 153.88 148.44 149.93 146.38 152.38 152.57 155.29 155.81 156.51 151.03 157.22 155.19 154.59 154.49 150.55 147.73 152.48 151.68 149.22 153.70 151.07 156.60 151.16 151.77 153.78 4976.12 4970.03 4962.03 4960.80 4972.33 4971.54 4972.77 4976.99 4974.44 4966.88 4975.76 4962.91 4965.57 4974.88 4978.66 4971.46 4973.57 4963.70 4975.67 4974.01 4976.55 4971.90 4973.21 4964.77 4970.22 4963.46 4973.65 4965.13 4966.01 4978.23 4970.66 4968.12 4969.79 92.78 86.11 77.22 75.00 88.33 86.11 88.33 92.78 90.56 81.67 90.56 77.22 81.67 90.56 95.00 88.33 90.56 79.44 92.78 90.56 92.78 88.33 88.33 79.44 86.11 79.44 88.33 81.67 81.67 95.00 86.11 83.89 86.11 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.567 2.567 2.567 2.567 2.567 2.567 2.567 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 118.52 119.84 118.52 121.15 118.52 119.84 125.10 125.10 125.10 125.10 121.15 125.10 119.84 122.47 118.52 119.84 121.15 125.10 121.15 121.15 117.21 123.78 125.10 4890.83 4890.39 4890.83 4889.95 4890.83 4890.39 4888.63 4888.63 4888.63 4888.63 4889.95 4888.63 4890.39 4889.51 4890.83 4890.39 4889.95 4888.63 4889.95 4889.95 4891.27 4889.07 4888.63 124.10 125.42 124.10 126.73 124.10 125.42 129.36 130.68 130.68 129.36 126.73 130.68 125.42 128.05 124.10 125.42 126.73 131.99 128.05 126.73 124.10 130.68 130.68 Critical Failure Surface (circle 1) 4888.97 4888.53 4888.97 4888.09 4888.97 4888.53 4887.21 4886.77 4886.77 4887.21 4888.09 4886.77 4888.53 4887.65 4888.97 4888.53 4888.09 4886.33 4887.65 4888.09 4888.97 4886.77 4886.77 147.82 151.95 147.12 149.05 151.33 151.25 150.94 153.00 154.40 151.64 148.35 155.11 147.03 149.66 145.01 149.84 149.75 158.57 154.62 150.46 149.97 157.25 152.29 4969.43 4977.43 4967.32 4964.33 4979.98 4975.32 4959.04 4963.02 4967.24 4961.15 4962.22 4969.35 4962.66 4961.79 4960.99 4971.10 4966.44 4977.54 4978.86 4968.55 4978.06 4977.98 4960.91 83.89 92.78 81.67 79.44 95.00 90.56 75.00 79.44 83.89 77.22 77.22 86.11 77.22 77.22 75.00 86.11 81.67 95.00 95.00 83.89 92.78 95.00 77.22 Intersects: XL: 121.15 YL: 4889.95 XR: 125.42 YR: 4888.53 Centre: XC: 153.32 YC: 4979.34 Radius: R: 95.00 Generated failure surface: (20 points) 121.15 4889.95 121.38 4889.87 121.60 4889.79 4889.63 122.27 4889.56 122.49 4889.48 122.72 4889.40 4889.25 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 121.82 4889.71 122.04 122.94 4889.33 123.16 123.39 4889.18 4888.88 124.51 4888.81 4888.53 123.61 4889.10 124.74 4888.74 123.84 4889.03 124.96 4888.67 124.06 4888.95 124.29 125.19 4888.60 125.42 Slice Geometry and Properties - Critical Failure Surface (circle 1, 38 slices) Slice X -S Base PoreWater Normal Test X -Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 121.15 0.00 19.8 0.11 0.12 1 0.00 45.0 2 121.26 0.00 19.8 0.11 0.12 1 0.00 45.0 3 121.38 0.00 19.5 0.11 0.12 1 0.00 45.0 4 121.49 0.00 19.5 0.11 0.12 1 0.00 45.0 5 121.60 0.00 19.3 0.11 0.12 1 0.00 45.0 6 121.71 0.00 19.5 0.11 0.12 1 0.00 45.0 7 121.82 0.00 19.3 0.11 0.12 1 0.00 45.0 8 121.93 0.00 19.3 0.11 0.12 1 0.00 45.0 9 122.04 0.00 19.1 0.11 0.12 1 0.00 45.0 10 122.16 0.00 19.3 0.11 0.12 1 0.00 45.0 11 122.27 0.00 19.0 0.11 0.12 1 0.00 45.0 12 122.38 0.00 19.0 0.11 0.12 1 0.00 45.0 13 122.49 0.00 18.8 0.11 0.12 1 0.00 45.0 14 122.60 0.00 19.0 0.11 0.12 1 0.00 45.0 15 122.72 0.00 18.6 0.11 0.12 1 0.00 45.0 16 122.83 0.00 18.8 0.11 0.12 1 0.00 45.0 17 122.94 0.00 18.8 0.11 0.12 1 0.00 45.0 18 123.05 0.00 18.5 0.11 0.12 1 0.00 45.0 19 123.16 0.00 18.5 0.11 0.12 1 0.00 45.0 20 123.28 0.00 18.3 0.11 0.12 1 0.00 45.0 21 123.39 0.00 18.3 0.11 0.12 1 0.00 45.0 22 123.50 0.00 18.3 0.11 0.12 1 0.00 45.0 23 123.61 0.00 18.3 0.11 0.12 1 0.00 45.0 24 123.72 0.00 18.1 0.11 0.12 1 0.00 45.0 0.02 0.00 0.05 0.00 0.09 0.00 0.12 0.00 0.14 0.00 0.17 0.00 0.19 0.00 0.22 0.00 0.24 0.00 0.26 0.00 0.28 0.00 0.29 0.00 0.31 0.00 0.32 0.00 0.33 0.00 0.33 0.00 0.34 0.00 0.34 0.00 0.35 0.00 0.35 0.00 0.34 0.00 0.34 0.00 0.34 0.00 0.33 0.00 0.14 0.42 0.71 0.94 1.13 1.32 1.51 1.70 1.89 2.03 2.18 2.27 2.42 2.51 2.61 2.61 2.70 2.71 2.76 2.76 2.71 2.71 2.66 2.57 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 25 123.84 0.00 18.0 0.11 0.12 1 0.00 45.0 0.33 0.00 2.57 0.93 26 123.95 0.00 18.0 0.11 0.12 1 0.00 45.0 0.31 0.00 2.48 0.93 27 124.06 0.00 17.8 0.11 0.12 1 0.00 45.0 0.30 0.00 2.34 0.93 28 124.17 0.00 17.8 0.11 0.12 1 0.00 45.0 0.28 0.00 2.20 0.93 29 124.29 0.00 17.8 0.11 0.12 1 0.00 45.0 0.26 0.00 2.05 0.93 30 124.40 0.00 17.8 0.11 0.12 1 0.00 45.0 0.24 0.00 1.91 0.93 31 124.51 0.00 17.5 0.11 0.12 1 0.00 45.0 0.22 0.00 1.72 0.93 32 124.63 0.00 17.5 0.11 0.12 1 0.00 45.0 0.21 0.00 1.63 0.93 33 124.74 0.00 17.5 0.11 0.12 1 0.00 45.0 0.18 0.00 1.39 0.93 34 124.85 0.00 17.3 0.11 0.12 1 0.00 45.0 0.15 0.00 1.15 0.93 35 124.96 0.00 17.3 0.11 0.12 1 0.00 45.0 0.12 0.00 0.91 0.93 36 125.08 0.00 17.3 0.11 0.12 1 0.00 45.0 0.08 0.00 0.67 0.93 37 125.19 0.00 17.3 0.11 0.12 1 0.00 45.0 0.05 0.00 0.43 0.93 38 125.30 0.00 17.1 0.11 0.12 1 0.00 45.0 0.02 0.00 0.14 0.93 X -S Area: 0.08 Path Length: 4.49 X -S Weight: 8.82 ge) DNR COLORADO Division of Reclamation, Mining and Safety Department of Natural Resources September 6, 2024 Daniel Hunt Asphalt Specialties Co., Inc. 345 W. 62nd Ave. Denver, CO 80216 Re: Marcovich Mining Resource, File No. M-2024-034, Preliminary Adequacy Review Dear Mr. Hunt: On June 28, 2024, the Division of Reclamation, Mining and Safety (Division/DRMS) received a 112 Construction Materials Reclamation Permit Application package for the Marcovich Mining Resource, File No. M-2024-034. The application was deemed complete on July 15, 2024. A pre -operation inspection of the proposed mine site was conducted on August 28, 2024. Based on the inspection and a review of the permit application package, the following items must be addressed and/or received before the Division can approve the application. The review consisted of comparing the application content with specific requirements of Rules 1, 3, 6.1, 6.2, 6.4 and 6.5 of the Minerals Rules and Regulations of the Colorado Mined Land Reclamation Board for the Extraction of Construction Materials. Any inadequacies are identified under the respective exhibit heading along with the suggested corrective actions. 1. As required by Rule 1.6.2(d) and 1.6.5(2), please submit proof of publication in a newspaper of general circulation in the locality of the proposed mining operation. Proof of publication may consist of either a copy of the last newspaper publication, to include the date published, or a notarized statement from the paper. 2. As required by Rule 1.6.2 (e), please submit Proof of Notice to all Owners of Record of the surface and mineral rights of the affected land and the Owners of Record of all land surface within 200 feet of the boundary of affected land. Proof of Notice may be by submitting return receipts of a Certified mailing or by proof of personal service. 3. The Division received comments from Colorado Parks and Wildlife, Weld County, and the Colorado Division of Water Resources. The comment letters are attached for your review. Please acknowledge and address the comments noted in the letters and make changes to the application/exhibits as necessary. Application Form 4. Page 4, Question 12: The operator checked Rangeland for the primary future (post mining) land use. The Reclamation Plan (page E-1) states that "Marcovich Mining Resource will Physical Address: 1313 Sherman Street, Room 215, Denver, Co 80203 P 303.866.3567 F 303.832.8106 Mailing Address: DRMS Room 215, 1001 E 62nd Ave, Denver, Co 80216 https://drms.colorado.gov Jared S. Polis, Governor I Dan Gibbs, Executive Director I Michael A. Cunningham, Director II Marcovich Mining Resource Adequacy Review Page 2 of 6 September 6, 2024 convert the site to a final land use of a water storage pond and rangeland." Table E-1 Reclamation Areas shows 26.7 acres of water storage pond and 12.1 acres of rangeland. Based on this estimate, please correct Page 4 of the application to select Developed Water Resources as the primary post mining land use. Additionally, please acknowledge that the operator will be required to submit an amendment application to change the post -mining land use from Developed Water Resources to Rangeland if the operator chooses to backfill all or a portion of the pit resulting in a change to the primary post mining land use. The Operator may also choose to submit an alternative reclamation plan and map with this application for review to allow for the option to backfill the site for a rangeland post mining land use. If the alternate plan is approved, the Operator would be required to submit a Technical Revision to change the reclamation plan from the primary to the alternate plan. 6.4.1 Exhibit A — Legal Description • Adequate as submitted. 6.4.2 Exhibit B — Index Map • Adequate as submitted. 6.4.3 Exhibits C Pre -mining & Mining Plan Map(s) of Affected Lands: 5. The C-1 Access map shows the haul road within the permit area, but it is not included in the affected area boundary. Please revise the map to depict the haul road within the affected area boundary and ensure the affected acres described in the introduction includes the haul road. 6. The C-1 Access map depicts an existing gravel trail north of the Chavers Mining Resource site (mine permit no. M2015030) and south of the proposed easement on Ogilvie Ken Living Trust land (parcel 147118000066). According to Weld County assessor data, this gravel trail is on land owned by the Hunt Brothers Properties (parcel 147118000084. This trail is not within the permitted acres for the Chavers Mining Resource site. The Mine Plan states that the Marcovich Mining Resource will be accessed via two 40 -foot easements crossing agricultural land on Ogilvie and Sakata Land from the Chavers site, but the map doesn't depict an easement on the Hunt Brothers parcel. Additionally, the applicant proposes to construct a two-lane graveled road through the easements. Will the gravel trail on Hunt Brothers Properties be substantially upgraded to a two-lane gravel road for the mining operation? 6.4.4 Exhibit D — Mining Plan: 7. The Mining Plan states that stockpiles must be below the elevation of the baseline conditions because the site is nearly entirely within the South Platte floodplain. Therefore, topsoil will be stored in designated stockpiles on the pit floor in the northeast corner of the pit, as shown on the C-3 Mine Plan map. Exhibit G, Item 3, states that in the event of flooding at the site, Marcovich Mining Resource Adequacy Review Page 3 of 6 September 6, 2024 equipment from the active mining floor will be removed and the pit will be allowed to fill with water. Per Rule 3.1.9, topsoil stockpiles shall be stored in places and configurations to minimize erosion and located in areas where disturbance by ongoing mining operations will be minimized. Please describe how topsoil stored on the pit floor will be protected from water erosion from storms and flooding, and disturbance from the mining operations. 8. The Mining Plan states that backfill materials may be hauled back to the site from the Chavers Mining Resource. Per Rule 3.1.5(g), an operator may backfill structural fill material generated within the MLRB permitted area into an excavated pit within the permit area as provided for in the MLRB Permit. However, if an operator intends to backfill inert structural fill generated outside of the approved permit area, it the Operator's responsibility to provide the Office notice of any proposed backfill activity not identified in the approved reclamation plan. Please acknowledge that an inert fill application will be required if backfill is imported to the site. 9. During the pre -operation inspection, the Division and Operator observed the active floodplain adjacent to the South Platte River and a Cottonwood canopy area within the 25 -year return interval of the floodplain along the entire western edge of the permit area. The Operator indicated these areas will be avoided during mining and reclamation. This zone is shown on the Mining plan as outside the affected area. Please discuss these two buffer zones in Exhibit D and state how the area will be protected from disturbance from mining operations. Exhibit E — Reclamation Plan (Rule 6.4.5): 10. As noted above in Item #4, the Operator may choose to submit an alternative reclamation plan and map with this application for review to allow for the option to backfill the site for a rangeland post mining land use. If the alternate plan is approved, the Operator would be required to submit a Technical Revision to change the reclamation plan from the primary to the alternate plan. Please submit the alternate reclamation plan in Exhibit E or acknowledge that an amendment application and inert fill application will need to be submitted prior to backfilling the pit. 11. Please update Table E-1 to show the final land use for the haul road that will remain after reclamation. Exhibit F — Reclamation Plan Map (Rule 6.4.6): 12. Please submit a map depicting the proposed reclamation (topography with contour lines and final land use) of the entire haul road between Marcovich and the Chavers site. Exhibit G — Water Information (Rule 6.4.7): 13. During the pre -operation inspection, the Operator discussed pumping water from the pit into a pond on in the northwestern portion of the permit area. According to the July 19, 2024 comment letter from Division of Water Resources (DWR), irrigation tailwater may be illegally being collected and used for livestock and the applicant may need to have a long-term SWSP or permanent augmentation plan even after reclamation if the reservoir will collect Marcovich Mining Resource Adequacy Review Page 4 of 6 September 6, 2024 stormwater runoff. Per Rule 3.1.6, please explain this comment and state how the operation will be in compliance with the applicable Colorado water laws and regulations governing injury to existing water rights. 14. According to the Review of Aquatic Resources in the project area, provided by GeosUAS (Exhibit J), the pond in the northwest corner of the site is a shallow groundwater pond connected to the South Platte River. Additionally, the pond receives supplemental irrigation water. Figure 3 in the report proposes that the pond is potentially jurisdictional and should be avoided. The Mine Plan proposes to utilize this pond as a settling basin. Per Rule 3.1.6(1)(c) please provide documentation on whether a USACE 404 permit is required and update the Mine Plan to state an alternative to dewatering the pit until the appropriate approval is obtained. 15. Per Rule 3.1.7(b)(i) the Operator shall include a map that accurately locates all proposed groundwater sample points and any locations that are proposed as points of compliance. The C-2 Baseline maps faintly depict the wells within 600 feet of the permit boundary but does not indicate which locations are associated with the monitoring well data for MW -1 and MW -2. Please revise the map to show the monitoring well locations in a more visible color and label the monitoring wells and points of compliance. Additionally, please note, the Division's Groundwater Guidance document states that a minimum of three groundwater data points are needed to establish groundwater flow direction across the site. 16. The Applicant has identified six groundwater wells within 600 feet of the proposed permit area. Page G-5, Section 7 states that groundwater quality data was gathered and the data and discussion can be seen in Appendix G-2. Appendix G-2 does not contain a discussion or a Groundwater Quality Monitoring Plan. Pursuant to Rule 3.1.6(1), please describe the anticipated effects to the wells and specify how the Operator will avoid disturbances to the quantity and quality of groundwater during and after the mining operation. 17. Appendix G-2 Groundwater Quality Monitoring Plan is incomplete with respect to Rule 3.1.7(b) and the DRMS Groundwater Monitoring: Sampling and Analysis Plan Guidance for Construction Materials and Hard Rock Sites. Please review the Guidance document (attached) and submit all the required information listed in Per Rule 3.1.7(b), including well construction diagrams, method of monitoring well completion, method of sampling, frequency of sampling, quality control and assurance methods, and potential sources of groundwater contamination. 18. The application includes only a cover page for Appendix G-3 Groundwater Model. Please submit the appendix for review. Exhibit H — Wildlife Information (Rule 6.4.8): 19. During the pre -operation inspection, the Division observed prairie dog colonies on site. Please update Exhibit H and the Mining Timetable in Exhibit D to address the comments from CPW, specifically wildlife surveys, timing stipulations for burrowing owls, and avoidance of the riparian zone adjacent to the South Platte to protect wildlife corridors in the Cottonwood canopy area within the floodplain. Marcovich Mining Resource Adequacy Review Page 5 of 6 September 6, 2024 Exhibit I - Soils Information (Rule 6.4.9) • Adequate as submitted. Exhibit J — Vegetation Information (Rule 6.4.10) • Adequate as submitted. Exhibit K — Climate (Rule 6.4.11) • Adequate as submitted. Exhibit M — Other Permits and Licenses (Rule 6.4.13) 20. Please update the list of permits to include a USACE 404 permit, if required. Exhibit N — Source of Legal Right to Enter (Rule 6.4.14) 21. Please submit evidence of a Legal Right to Enter for the parcels owned by Hunt Brothers Properties, Ogilvie Ken Living Trust and Sakata Land Co. associated with the construction and use of the gravel road for hauling material from Marcovich to the Chavers Mining 22. The signed Legal Right to Enter between Asphalt Specialties and Jerry and Adam Marcovich refers to an attachment. Please submit the referenced Quit Claim Deed. Exhibit O — Owner(s) of Record of Affected Land (Surface Area) and Owners of Substance to be Mined (Rule 6.4.16) 23. Please update Exhibit O to list all landowners of affected land including the haul road that will be constructed between the Markovich and Chavers mine sites. Exhibit P — Municipalities within Two Miles (Rule 6.4.17) • Adequate as submitted. Exhibit Q - Proof of Mailing of Notices to County Commissioners and Soil Conservation District (Rule 6.4.17): 24. Per Rule 1.6.2 the Applicant shall send a notice, on a form approved by the Board, to the local Board of County Commissioners Soil Conservation District. The applicant provided evidence of a certified mailing (receipts) to the Weld County Commissioners and the Platte Valley Conservation District; however, the applicant did not submit evidence that a form approved by the Board (page 9 of the 112c application) was sent to each entity. Please provide a copy of the notices that were sent. Marcovich Mining Resource Adequacy Review Page 6 of 6 September 6, 2024 Exhibit R — Proof of Filing with County Clerk and Recorder (Rule 6.4.18): • Adequate as submitted. Exhibit S — Permanent Man -Made Structures (Rule 6.4.19): 25. In accordance with Rule 6.4.19, when mining operations will adversely affect the stability of any significant, valuable and permanent man-made structure located within 200 feet of the affected area the applicant shall provide a notarized agreement between the applicant and the person(s) having an interest in the structure, that the applicant is to provide compensation for any damage to the structure. The Division acknowledges that the applicant provided an engineering evaluation in Exhibit S, which is an option under Rule 6.4.19 when such a structure agreement cannot be reached. However, please provide evidence that a structure agreement was pursued for with each of structure owners listed in Table S-1 and submit the signed/notarized structure agreements to the Division. This concludes the Division's preliminary adequacy review of this application. The public comment period for this application closed on September 3, 2024. Please note that the decision date for this application is October 13, 2024. If you are unable to provide satisfactory responses to any inadequacies prior to this date, it will be your responsibility to request an extension of time to allow for continued review of this application. If you have any questions, please contact me by telephone at 720-527-1640 or by email at. Sincerely, /2e4;2- /a.7.0 -1-6,-)-t Nikie Gagnon Environmental Protection Specialist Enclosures: CPW Comment Letter Weld County Comment Letter DWR Comment Letter DRMS Groundwater Monitoring: Sampling and Analysis Plan Guidance Cc: Greg Geras, Asphalt Specialties Ben Langenfeld, Lewicki & Associates Jared Ebert, DRMS L Lewicki 8r Associates ENGINEERING I GEOLOGY I ENVIRONMENTAL September 20, 2024 Nikie Gagnon Environmental Protection Specialist DRMS Room 215 1001 E 62nd Ave Denver, CO 80216 Marcovich Resource 112c Construction Materials Reclamation Permit Application Ms. Gagon: Please see our adequacy responses inline with your comments. The comments have been addressed in line as well as in the permit documents and maps. Adequacy comments and responses: • As required by Rule 1.6.2(d) and 1.6.5(2), please submit proof of publication in a newspaper of general circulation in the locality of the proposed mining operation. Proof of publication may consist of either a copy of the last newspaper publication, to include the date published, or a notarized statement from the paper. Please see attached proof of publication. • As required by Rule 1.6.2 (e), please submit Proof of Notice to all Owners of Record of the surface and mineral rights of the affected land and the Owners of Record of all land surface within 200 feet of the boundary of affected land. Proof of Notice may be by submitting return receipts of a Certified mailing or by proof of personal service. Please see attached proof of mailing. • The Division received comments from Colorado Parks and Wildlife, Weld County, and the Colorado Division of Water Resources. The comment letters are attached for your review. Please acknowledge and address the comments noted in the letters and make changes to the application/exhibits as necessary. Colorado DWR — Stock ponds previously capturing water from the south have been blocked from capturing that water. Text in Exhibit D and H have been adjusted. Marcovich Resource © Lewicki & Associates Colorado DWR — The gravel well permit and SWSP are included as additional required permits. Colorado DWR — Ground water modeling is underway to determine impacts. This site is not surrounded by lined pits and it is not anticipated that the slurry wall will have impacts. Colorado DWR — Well permit no. 124421 is associated with the home located on the property. It will not be utilized for the operation. Colorado DNR Parks & Wildlife — Construction timing has been added to the mining timetable to avoid new ground disturbing activities between March 15 and October 31 or to complete a Burrowing Owl Survey. Wording has also been added to either avoid raptor nesting timing limitations from March 31 until July 31 or to perform a raptor survey prior to new ground disturbing activities. Colorado DNR Parks & Wildlife — Mule deer impacts have been mitigated by committing to maintaining the riparian buffer and only mining in the areas disturbed by previous agricultural practices. Colorado DNR Parks & Wildlife — No new fencing is planned with this application. If fencing associated with mining does occur onsite it will follow CPW guidelines. Colorado DNR Parks & Wildlife — Noxious Weeds and re -seeding of the site are covered by the reclamation section of the permit. Colorado DNR Parks & Wildlife — No tree replacement is planned due to the final reclamation land use. Minimal trees will be removed for mining as the riparian corridor will remain undisturbed. Colorado DNR Parks & Wildlife — Wildlife escape ramps will be provided during the mining operation through the ramp used to access the pit floor. Colorado DNR Parks & Wildlife — No retention ponds will be created with this site. Only a water storage pond will be created and designed to meet market expectations for water storage. Colorado DNR Parks & Wildlife — Aquatic Species' impacts will be mitigated by the protection of the riparian cottonwood gallery. Colorado DNR Parks & Wildlife — Mule Deer HPHs Marcovich Adequacy #1 2 © Lewicki & Associates Application Form • Page 4, Question 12: The operator checked Rangeland for the primary future (post mining) land use. The Reclamation Plan (page E-1) states that "Marcovich Mining Resource will convert the site to a final land use of a water storage pond and rangeland." Table E-1 Reclamation Areas shows 26.7 acres of water storage pond and 12.1 acres of rangeland. Based on this estimate, please correct Page 4 of the application to select Developed Water Resources as the primary post mining land use. Additionally, please acknowledge that the operator will be required to submit an amendment application to change the post -mining land use from Developed Water Resources to Rangeland if the operator chooses to backfill all or a portion of the pit resulting in a change to the primary post mining land use. The Operator may also choose to submit an alternative reclamation plan and map with this application for review to allow for the option to backfill the site for a rangeland post mining land use. If the alternate plan is approved, the Operator would be required to submit a Technical Revision to change the reclamation plan from the primary to the alternate plan. Please see the revised attached application form. The operator acknowledges that changing a post reclamation land use requires an amendment. 6.4.1 Exhibit A — Legal Description • Adequate as submitted. Legal Description of ROW along Hunt Brothers Properties Inc. to reach the Chavers Resource has been added. 6.4.2 Exhibit B — Index Map • Adequate as submitted. Hunt Brothers Properties, Inc. easement has been added to Exhibit B Index Map. 6.4.3 Exhibits C Pre -mining & Mining Plan Map(s) of Affected Lands: • The C-1 Access map shows the haul road within the permit area, but it is not included in the affected area boundary. Please revise the map to depict the haul road within the affected area boundary and ensure the affected acres described in the introduction includes the haul road. Marcovich Adequacy #1 3 © Lewicki & Associates Please see the revised C-1 map. The affected area boundary has been modified. • The C-1 Access map depicts an existing gravel trail north of the Chavers Mining Resource site (mine permit no. M2015030) and south of the proposed easement on Ogilvie Ken Living Trust land (parcel 147118000066). According to Weld County assessor data, this gravel trail is on land owned by the Hunt Brothers Properties (parcel 147118000084. This trail is not within the permitted acres for the Chavers Mining Resource site. The Mine Plan states that the Marcovich Mining Resource will be accessed via two 40 -foot easements crossing agricultural land on Ogilvie and Sakata Land from the Chavers site, but the map doesn't depict an easement on the Hunt Brothers parcel. Additionally, the applicant proposes to construct a two-lane graveled road through the easements. Will the gravel trail on Hunt Brothers Properties be substantially upgraded to a two-lane gravel road for the mining operation? Please see the revised C-1 map. The affected area and permit boundaries have been modified to connect the Chavers Resource affected area and Marcovich Resource permit boundaries. 6.4.4 Exhibit D— Mining Plan: • The Mining Plan states that stockpiles must be below the elevation of the baseline conditions because the site is nearly entirely within the South Platte floodplain. Therefore, topsoil will be stored in designated stockpiles on the pit floor in the northeast corner of the pit, as shown on the C-3 Mine Plan map. Exhibit G, Item 3, states that in the event of flooding at the site, equipment from the active mining floor will be removed and the pit will be allowed to fill with water. Per Rule 3.1.9, topsoil stockpiles shall be stored in places and configurations to minimize erosion and located in areas where disturbance by ongoing mining operations will be minimized. Please describe how topsoil stored on the pit floor will be protected from water erosion from storms and flooding, and disturbance from the mining operations. Please see revised Map C-3. Topsoil stockpiles have been placed on the far east side of the permit area to remove this issue. • The Mining Plan states that backfill materials may be hauled back to the site from the Chavers Mining Resource. Per Rule 3.1.5(g), an operator may backfill structural fill material generated within the MLRB permitted area into an excavated pit within the permit area as provided for in the MLRB Permit. However, if an operator intends to Marcovich Adequacy #1 4 © Lewicki & Associates backfill inert structural fill generated outside of the approved permit area, it the Operator's responsibility to provide the Office notice of any proposed backfill activity not identified in the approved reclamation plan. Please acknowledge that an inert fill application will be required if backfill is imported to the site. The operator intends to import backfill material under the same process as the Chavers Resource utilizing the import documents and processes as already approved. • During the pre -operation inspection, the Division and Operator observed the active floodplain adjacent to the South Platte River and a Cottonwood canopy area within the 25 -year return interval of the floodplain along the entire western edge of the permit area. The Operator indicated these areas will be avoided during mining and reclamation. This zone is shown on the Mining plan as outside the affected area. Please discuss these two buffer zones in Exhibit D and state how the area will be protected from disturbance from mining operations. Please see the modified Exhibit D with the following changes: "The affected area boundary avoids the active South Platte River channel and riparian buffer along the river except for inlet/outlet control structures. The affected area boundary will be signed to prevent disturbance outside that area." Exhibit E — Reclamation Plan (Rule 6.4.5): • As noted above in Item #4, the Operator may choose to submit an alternative reclamation plan and map with this application for review to allow for the option to backfill the site for a rangeland post mining land use. If the alternate plan is approved, the Operator would be required to submit a Technical Revision to change the reclamation plan from the primary to the alternate plan. Please submit the alternate reclamation plan in Exhibit E or acknowledge that an amendment application and inert fill application will need to be submitted prior to backfilling the pit. The operator acknowledges that an amendment application will need to be submitted prior to completely backfilling the pit, however final water surface area may vary based on geologic conditions and rate of import. This can be seen in both the text and the reclamation map. The site will be utilizing the same import of materials process as the Chavers Resource. • Please update Table E-1 to show the final land use for the haul road that will remain after reclamation. Marcovich Adequacy #1 5 © Lewicki & Associates Please see the updated Table E-1 in Exhibit E. Exhibit F — Reclamation Plan Map (Rule 6.4.6): • Please submit a map depicting the proposed reclamation (topography with contour lines and final land use) of the entire haul road between Marcovich and the Chavers site. Post mine land use will remain the same as the pre -mine land use of the access road. After mining has been completed, the improved access road will remain for use by the landowners. Please see the revised maps for contours along the access road. Exhibit G — Water Information (Rule 6.4.7): • During the pre -operation inspection, the Operator discussed pumping water from the pit into a pond on in the northwestern portion of the permit area. According to the July 19, 2024 comment letter from Division of Water Resources (DWR), irrigation tailwater may be illegally being collected and used for livestock and the applicant may need to have a long-term SWSP or permanent augmentation plan even after reclamation if the reservoir will collect stormwater runoff. Per Rule 3.1.6, please explain this comment and state how the operation will be in compliance with the applicable Colorado water laws and regulations governing injury to existing water rights. Please see the attached series of photos depicting the history of the pond on the site. The pond is the remanent of a gravel pit that operated from 1960's until being captured by the river in the late 1970's. Central Colorado Water Conservancy District (CCWCD) installed augmentation wells east of Highway 85 that discharged into a ditch, flowed underneath the highway and into the pond in question. In 2009, CCWCD was ordered to cease and desist from pumping those wells. The ditch has remained abandoned since those orders. Billy Mihelich, PE, the district engineer authorized the ditch be removed by the mining. The mine's intent is to utilize the pond as a discharge point for dewatering activities to prevent potential for erosion at the discharge point. Historic aerial photos have been attached to demonstrate that the pond was part of a historic gravel pit. • According to the Review of Aquatic Resources in the project area, provided by Marcovich Adequacy #1 6 © Lewicki & Associates GeosUAS (Exhibit J), the pond in the northwest corner of the site is a shallow groundwater pond connected to the South Platte River. Additionally, the pond receives supplemental irrigation water. Figure 3 in the report proposes that the pond is potentially jurisdictional and should be avoided. The Mine Plan proposes to utilize this pond as a settling basin. Per Rule 3.1.6(1)(c) please provide documentation on whether a USACE 404 permit is required and update the Mine Plan to state an alternative to dewatering the pit until the appropriate approval is obtained. Text has been updated in the mining plan to reflect better wording. The pond no longer receives irrigation water. A dewatering sump will be constructed within the pit to allow for sediment to settle. Only water passing discharge standards will be pumped to the discharge point. The described activity is neither the discharge or placement of dredged or fill material, therefore, a USACE 404 permit is not necessary. Colorado HB 24-1379: Regulate Dredge & Fill Activities in State Waters was also checked for consistency and whether a separate application would be needed. No permit is required under HB 24-1379 nor the Clean Water Policy 17 based on the same conditions as the USACE 404. See the revised Map C-3 for the proposed discharge configuration. • Per Rule 3.1.7(b)(i) the Operator shall include a map that accurately locates all proposed groundwater sample points and any locations that are proposed as points of compliance. The C-2 Baseline maps faintly depict the wells within 600 feet of the permit boundary but does not indicate which locations are associated with the monitoring well data for MW -1 and MW -2. Please revise the map to show the monitoring well locations in a more visible color and label the monitoring wells and points of compliance. Additionally, please note, the Division's Groundwater Guidance document states that a minimum of three groundwater data points are needed to establish groundwater flow direction across the site. Please see the revised C-2 map with improved labeling. Two additional wells have been added to the monitoring plan. Those wells are also shown on the map. Visibility has been improved on the maps. • The Applicant has identified six groundwater wells within 600 feet of the proposed permit area. Page G-5, Section 7 states that groundwater quality data was gathered and the data and discussion can be seen in Appendix G-2. Appendix G-2 does not contain a discussion or a Groundwater Quality Monitoring Plan. Pursuant to Rule 3.1.6(1), please describe the anticipated effects to the wells and specify how the Operator will avoid disturbances to the quantity and quality of groundwater during and after the mining operation. Marcovich Adequacy #1 7 © Lewicki & Associates Please see the GQMP provided by ASCI. • Appendix G-2 Groundwater Quality Monitoring Plan is incomplete with respect to Rule 3.1.7(b) and the DRMS Groundwater Monitoring: Sampling and Analysis Plan Guidance for Construction Materials and Hard Rock Sites. Please review the Guidance document (attached) and submit all the required information listed in Per Rule 3.1.7(b), including well construction diagrams, method of monitoring well completion, method of sampling, frequency of sampling, quality control and assurance methods, and potential sources of groundwater contamination. Please see the GQMP provided by ASCI. • The application includes only a cover page for Appendix G-3 Groundwater Model. Please submit the appendix for review. Please see the GQMP provided by ASCI. Exhibit H — Wildlife Information (Rule 6.4.8): • During the pre -operation inspection, the Division observed prairie dog colonies on site. Please update Exhibit H and the Mining Timetable in Exhibit D to address the comments from CPW, specifically wildlife surveys, timing stipulations for burrowing owls, and avoidance of the riparian zone adjacent to the South Platte to protect wildlife corridors in the Cottonwood canopy area within the floodplain. Timing limitation language has been added to Exhibit H. Exhibit I - Soils Information (Rule 6.4.9) • Adequate as submitted. Exhibit J — Vegetation Information (Rule 6.4.10) • Adequate as submitted. Exhibit K— Climate (Rule 6.4.11) • Adequate as submitted. Exhibit M — Other Permits and Licenses (Rule 6.4.13) • Please update the list of permits to include a USACE 404 permit, if required. Marcovich Adequacy #1 8 © Lewicki & Associates A USACE 404 Permit is not required. The described activity is neither the discharge or placement of dredged or fill material, therefore, a USACE 404 permit is not necessary. Colorado HB 24-1379: Regulate Dredge & Fill Activities in State Waters was also checked for consistency and whether a separate application would be needed. No permit is required under HB 24-1379 nor the Clean Water Policy 17 based on the same conditions as the USACE 404. Exhibit N — Source of Legal Right to Enter (Rule 6.4.14) • Please submit evidence of a Legal Right to Enter for the parcels owned by Hunt Brothers Properties, Ogilvie Ken Living Trust and Sakata Land Co. associated with the construction and use of the gravel road for hauling material from Marcovich to the Chavers Mining Please see the attached Legal Right to Enter documents for the above referenced owners. • The signed Legal Right to Enter between Asphalt Specialties and Jerry and Adam Marcovich refers to an attachment. Please submit the referenced Quit Claim Deed. Please see the attachment for the Legal Right to Enter. Exhibit 0 — Owner(s) of Record of Affected Land (Surface Area) and Owners of Substance to be Mined (Rule 6.4.16) • Please update Exhibit 0 to list all landowners of affected land including the haul road that will be constructed between the Markovich and Chavers mine sites. Please see the revised Exhibit O that now includes Hunt Brothers Properties, Properties, Ogilvie Ken Living Trust and Sakata Land Co. Exhibit P — Municipalities within Two Miles (Rule 6.4.17) • Adequate as submitted. Exhibit Q - Proof of Mailing of Notices to County Commissioners and Soil Conservation District (Rule 6.4.17): Marcovich Adequacy #1 9 © Lewicki & Associates • Per Rule 1.6.2 the Applicant shall send a notice, on a form approved by the Board, to the local Board of County Commissioners Soil Conservation District. The applicant provided evidence of a certified mailing (receipts) to the Weld County Commissioners and the Platte Valley Conservation District; however, the applicant did not submit evidence that a form approved by the Board (page 9 of the 112c application) was sent to each entity. Please provide a copy of the notices that were sent. Please see the attached notice forms Exhibit R— Proof of Filing with County Clerk and Recorder (Rule 6.4.18): • Adequate as submitted. Exhibit S — Permanent Man -Made Structures (Rule 6.4.19): • In accordance with Rule 6.4.19, when mining operations will adversely affect the stability of any significant, valuable and permanent man-made structure located within 200 feet of the affected area the applicant shall provide a notarized agreement between the applicant and the person(s) having an interest in the structure, that the applicant is to provide compensation for any damage to the structure. The Division acknowledges that the applicant provided an engineering evaluation in Exhibit S, which is an option under Rule 6.4.19 when such a structure agreement cannot be reached. However, please provide evidence that a structure agreement was pursued for with each of structure owners listed in Table S-1 and submit the signed/notarized structure agreements to the Division. Aurora and CDOT have returned signed structure agreements. The remaining have been mailed structure agreements but have not returned the agreements. Regards, Benjamin Miller, PhD. Lewicki & Associates, PLLC (720) 842- 5321 ben@lewicki.biz Marcovich Adequacy #1 10 © Lewicki & Associates ''1'^ t E, ,c t 1 w 4 f?7,-;..„4;c:,„ Permit Boundar` 4 I . - • . Y Otk -..•y 41 40 `r - I. 1 R y♦ .♦ r . ' ," yr: • t,„ 24 . 1 1, ,U : •e• 447. I IVA e � „ k. or 70 .1, a 4 AMP E` r - ' • 4,1$1.-480 1; r *tea''* 'r.'�•" • 4. .'i a R .70 11:4 ,Ar4' C. i `lk ' • I • ,46 4i —i 4 71X -earl v rJl kr • '. -, • • an r "1 t ,.. w ', ',• F . • . '''• Or ', 4`k t ,ea ' I. • r wry a-i-s , Ili' ..4_,, • r . .84 will i it Asi 4, •S !.. , . b 4 I' 1 t E • • f L Lewicki 8r Associates ENGINEERING I GEOLOGY I ENVIRONMENTAL November 4, 2024 Nikie Gagnon Environmental Protection Specialist DRMS Room 215 1001 E 62nd Ave Denver, CO 80216 Marcovich Resource 112c Construction Materials Reclamation Permit Application AR#2 Ms. Gagnon: Please see our adequacy responses inline with your comments. The comments have been addressed in line as well as in the permit documents and maps. 1. Adequacy Response Letter Page 2: The last sentence of the response to the Colorado Parks and Wildlife comments states "Colorado DNR Parks & Wildlife — Mule Deer HPHs. Did you intend to respond to this comment? If so, please submit the complete response to the Division. We feel that by avoiding the riparian buffer, mule deer impacts have been mitigated by maintaining the riparian buffer and only mining in the areas disturbed by previous agricultural practices. CPW Mule Deer Severe Winter Range, Winter Concentration Areas and Migration Corridors shape files are created by offsets of the center line of the river corridor. Those boundaries closely align with the riparian buffer that has been excluded from mining. Only the inlet/outlet structures are within those areas. 2. Adequacy Response Letter Page 5 states, "The operator intends to import backfill material under the same process as the Chavers Resource utilizing the import documents and processes as already approved... The applicant acknowledges the requirement to submit an inert fill application to the Division for the Marcovich permit area prior to importing fill. 3. The applicant submitted a revised Map C-3 which shows the topsoil stockpiles along the east side of the permit area. Please revise the text in Exhibit D Section 4 Topsoil and Overburden Handling to reflect this change and submit the revised Exhibit to the Division. The sentence, "Stockpiles must be below the elevation of the baseline conditions because the site is nearly entirely within the floodplain." has been deleted. Remaining references are to mapped locations. 4. Exhibit D Section 5 Site Access states, "the Marcovich Mining Resource will be accessed via Marcovich Resource © Lewicki & Associates two easements to cross agricultural land to the active Chavers Mining Resource." This is incorrect. Please update the text to state there are three easements to be consistent with Exhibit A and the Map C-1 — Access Map. Please also label the three easements on Map C-1 as described in Exhibit A and resubmit the C-1 map and the revised Exhibit D to the Division. The text has been updated to state three. Labels have been added to map C-1, which is attached. 5. The Division accepts the insertion of an Alternative Reclamation Plan in Exhibit E Section 2, along with the Alternative Reclamation Plan Map in Exhibit F-3. Please commit to submitting a Technical Revision to change the final size/configuration of the Developed Water Resource and adjacent rangeland areas, if the plan deviates from Exhibit E Table E-1 and Map F-1... The applicant acknowledges the requirement to submit a Technical Revision to change the final size/configuration of the Developed Water Resource and adjacent rangeland areas, if the plan deviates from Exhibit E Table E-1 and Map F-1. Additionally, the applicant acknowledges the requirement to submit an amendment application to completely backfill the pit. Finally, the application acknowledges their responsibility to provide the Office notice of any proposed backfill activity not identified in the approved reclamation plan. 6. Exhibit G Section 1. General: The applicant states that Billy Mihelich, PE, the district engineer authorized the ditch to be removed by the mining. Please submit evidence of this authorization to the Division. Please see the attached pdf of the email from Bill Mihelich, PE. 7. Exhibit G, Section 18. Wetlands... While the NWI does show wetlands in the access ROW, the resolution of the data does not represent the area well. The following photo shows the ROW section which overlaps with the NWI mapped area. The existing road will be improved with road base but will not enter the lower terrace which maybe jurisdictional wetlands. A fence delineates the end of the riparian area. Marcovich Adequacy #1 2 © Lewicki & Associates 8. Appendix G-2 Groundwater Monitoring Plan (GWMP): In Exhibit G Section 1.2 Monitoring Well Network,... Please see the attached revised GWMP. The operator commits to submitting a Baseline Data Summary report as a Technical Revision to the Division, prior to commencement of mining. 9. Appendix G-3 Dewatering Evaluation Report. The operator acknowledges that the Division will require the operator to evaluate the groundwater impacts if the groundwater levels are nearing the trigger points listed in Table 4.1.2. Marcovich Adequacy #1 3 © Lewicki & Associates 10. The Division reviewed the applicant's Reclamation Cost Estimate in Exhibit L and concurs with the $1,418,253.00 estimate. The applicant looks forward to posting the bond. Regards, Benjamin Miller, PhD. Lewicki & Associates, PLLC (720) 842- 5321 ben@lewicki.biz Marcovich Adequacy #1 4 © Lewicki & Associates From: Ben Miller <ben@lewicki.biz> Sent: Monday, April 1, 2024 11:51 AM To: William Mihelich <wmihelich@ccwcd.org> Subject: Removal or reroute of concrete lined ditch. Thank you for your time today. The attached kmz file shows the ditch location. It cuts across the middle of the planned pit. I will get you a boundary for the future pit later today. We are adjusting it based on wetland feedback. -Ben Miller Marcovich Adequacy #1 5 © Lewicki & Associates From: William Mihelich <wmihelich@ccwcd.org> Sent: Monday, April 1, 2024 11:51 AM To: Ben Miller <ben@lewicki.biz> Subject: RE: Removal or reroute of concrete lined ditch. Ben, I took a look at what you sent and you are okay to proceed with the removal of the concrete lined ditch that is shown in red. Billy Mihelich, P.E. District Engineer Central Colorado Water Conservancy District 3209 W. 28th St., Greeley, Colorado, 80634 (O) 970-330-4540 (C) 970-888-4772 Marcovich Adequacy #1 6 © Lewicki & Associates ge) DNR October 25, 2024 COLORADO Division of Reclamation, Mining and Safety Department of Natural Resources Greg Geras Asphalt Specialties Co., Inc. 345 W. 62"d Ave. Denver, CO 80216 Re: Marcovich Mining Resource, File No. M-2024-034, Adequacy Review #2 Dear Mr. Hunt: The Division of Reclamation, Mining and Safety (Division/DRMS) is reviewing the 112 Construction Materials Reclamation Permit Application package for the Marcovich Mining Resource. The Division sent a preliminary adequacy letter to the applicant on September 9, 2024. After a review of the adequacy responses submitted by Lewicki and Associates on October 8, 2024, the Division and has the following additional questions. 1. Adequacy Response Letter Page 2: The last sentence of the response to the Colorado Parks and Wildlife comments states "Colorado DNR Parks & Wildlife — Mule Deer HPHs. Did you intend to respond to this comment? If so, please submit the complete response to the Division. 2. Adequacy Response Letter Page 5 states, "The operator intends to import backfill material under the same process as the Chavers Resource utilizing the import documents and processes as already approved. The Marcovich permit area is not an extension of the Chavers Resource mine permit. These are two separate permit areas. Per Rule 3.1.5(9), an operator may backfill structural fill material generated within the MLRB permitted area into an excavated pit within the permit area as provided for in the MLRB Permit. However, if an operator intends to backfill inert structural fill generated outside of the approved permit area, it the Operator's responsibility to provide the Office notice of any proposed backfill activity not identified in the approved reclamation plan. If the operator intends to use backfill material generated outside the permit area, an inert fill application will be required which includes the following information: • A narrative that describes the approximate location of the proposed activity; • the approximate volume of inert material to be backfilled; • a signed affidavit certifying that the material is clean and inert, as defined in Rule 1.1(22); the approximate dates the proposed activity will commence and end, however, such dates shall not be an enforceable condition; an explanation of how the backfilled site will result in a post -mining configuration that is compatible with the approved post - mining land use; and • a general engineering plan stating how the material will be placed and stabilized in a manner to avoid unacceptable settling and voids. Please acknowledge the requirement to submit an inert fill application to the Division for the Marcovich permit area prior to importing fill. Physical Address: 1313 Sherman Street, Room 215, Denver, Co 80203 P 303.866.3567 F 303.832.8106 Mailing Address: DRMS Room 215, 1001 E 62nd Ave, Denver, Co 80216 https://drms.colorado.gov Jared S. Polis, Governor I Dan Gibbs, Executive Director I Michael A. Cunningham, Director Marcovich Mining Resource Adequacy Review Page 2 of 3 October 25, 2024 6.4.4 Exhibit D — Mining Plan: 3. The applicant submitted a revised Map C-3 which shows the topsoil stockpiles along the east side of the permit area. Please revise the text in Exhibit D Section 4 Topsoil and Overburden Handling to reflect this change and submit the revised Exhibit to the Division. 4. Exhibit D Section 5 Site Access states, "the Marcovich Mining Resource will be accessed via two easements to cross agricultural land to the active Chavers Mining Resource." This is incorrect. Please update the text to state there are three easements to be consistent with Exhibit A and the Map C-1 — Access Map. Please also label the three easements on Map C-1 as described in Exhibit A and resubmit the C-1 map and the revised Exhibit D to the Division. 6.4.5 Exhibit E — Reclamation Plan: 5. The Division accepts the insertion of an Alternative Reclamation Plan in Exhibit E Section 2, along with the Alternative Reclamation Plan Map in Exhibit F-3. Please commit to submitting a Technical Revision to change the final size/configuration of the Developed Water Resource and adjacent rangeland areas, if the plan deviates from Exhibit E Table E-1 and Map F-1. Additionally, if the operator chooses to completely backfill the pit, an amendment application will be required to change the primary post mining land use and the reclamation plan. As noted in #2 above please acknowledge that Per Rule 3.1.5(9), it is the Operator's responsibility to provide the Office notice of any proposed backfill activity not identified in the approved reclamation plan. If the operator intends to use backfill material generated outside the permit area, an inert fill application will be required for the Marcovich site. Exhibit G — Water Information (Rule 6.4.7): 6. Exhibit G Section 1. General: The applicant states that Billy Mihelich, PE, the district engineer authorized the ditch to be removed by the mining. Please submit evidence of this authorization to the Division. 7. Exhibit G, Section 18. Wetlands. The applicant states the wetlands are limited to a concrete lined ditch and a settling pond at the end of the ditch. Additionally, Map C -1 -Access Map does not depict any NWI wetlands. The Division reviewed the NWI online wetland mapper which shows a portion of the proposed access road within a NWI mapped wetland. Per Rule 3.1.6(1)(c) please indicate how the operation will comply with applicable federal and Colorado dredge and fill requirements. 8. Appendix G-2 Groundwater Monitoring Plan (GWMP): In Exhibit G Section 1.2 Monitoring Well Network, the applicant states that 4 monitoring wells (MW -1 through MW -4) have been installed to characterize baseline groundwater conditions at the site. Baseline data for two monitoring wells, MW1 and MW2 were submitted with the GWMP. The Division's Groundwater Sampling and Analysis Plan Guidance document states that a minimum of three groundwater data points are required to establish groundwater flow direction across the site. The Division acknowledges ASCI's statement in the GWMP, "additional baseline characterization data will be collected to supplement the current information, the final data set used to characterize baseline groundwater conditions will be finalized prior to commencement of mining related activities that will impact the site." Please commit to submitting a Baseline Data Summary report as a Technical Revision to the Division, prior to commencement of mining. The Data Summary Report should include all water Marcovich Mining Resource Adequacy Review Page 3 of 3 October 25, 2024 quality and water level data collected to date (minimum 5 quarters) for the four monitoring wells, identify any exceedances in Table Value Standards, and provide a rationale for observed exceedances, if possible. 9. Appendix G-3 Dewatering Evaluation Report. The report states, "The model predicts mine dewatering will result in a drawdown of much less than one foot in all directions from the mine faces. The placement of the slurry wall substantially mitigates the effects of dewatering and will substantially reduce the pumping rate required for dry mining. If required, groundwater mounding resulting from the placement of the slurry wall can be mitigated by installing a single drain and associated infiltration gallery." Additionally, the Groundwater Monitoring Plan sets a trigger limit of two (2) feet above the baseline high or two feet below baseline low measurement. Please acknowledge that the Division will require the operator to evaluate the groundwater impacts if the groundwater levels are nearing the trigger points listed in Table 4.1.2 and may require the operator to install a drain and associated infiltration gallery to mitigate the hydrologic impacts. Note, the requirements of the groundwater monitoring plan will continue to apply until final bond release and termination of jurisdiction. Changes to the groundwater monitoring plan will require a Technical Revision to the permit. 10. The Division reviewed the applicant's Reclamation Cost Estimate in Exhibit L and concurs with the $1,418,253.00 estimate. This concludes the Division's 2nd adequacy review of this application. The Division is required to make an approval or denial decision no later than October 31, 2024; therefore, a response to the following adequacy review concerns should be submitted to the Division as soon as possible. If you are unable to provide satisfactory responses to any inadequacies prior to this date, it will be your responsibility to request an extension of time to allow for continued review of this application. Please contact me if you have any questions, by telephone at 720-527-1640 or by email at nikie.gagnon@state.co.us. Sincerely, /l2e4;2 /afee-&-rt Nikie Gagnon Environmental Protection Specialist Cc: Ben Miller, Lewicki & Associates Jared Ebert, DRMS Marcovich Mining Resource 112c Colorado Division of Reclamation, Mining, and Safety Construction Material Regular Operation Application May 2024 Asphalt Specialties Co., Inc. L Lewicki 8( Associates Table of Contents INTRODUCTION EXHIBIT A LEGAL DESCRIPTION EXHIBIT B INDEX MAP EXHIBIT C PREMINE AND MINE PLAN MAPS EXHIBIT D MINING PLAN EXHIBIT E RECLAMATION PLAN EXHIBIT F RECLAMATION MAPS EXHIBIT G WATER INFORMATION APPENDIX G-1 HYDROLOGY CALCULATIONS APPENDIX G-2 GROUNDWATER QUALITY MONITORING PLAN EXHIBIT H WILDLIFE INFORMATION EXHIBIT I SOILS INFORMATION APPENDIX I-1 SOIL REPORT EXHIBIT J VEGETATION INFORMATION APPENDIX J-1 WETLANDS REPORT EXHIBIT K CLIMATE INFORMATION EXHIBIT L RECLAMATION COSTS EXHIBIT M OTHER PERMITS REQUIRED EXHIBIT N RIGHT OF ENTRY EXHIBIT 0 OWNERS OF AFFECTED LAND AND MINERAL TO BE MINED EXHIBIT P MUNICIPALITIES WITHIN TWO MILES EXHIBIT Q PROOF OF MAILING OF NOTICES TO THE BOARD OF COUNTY COMMISSIONERS AND SOIL CONSERVATION DISTRICT EXHIBIT R PROOF OF FILING WITH COUNTY CLERK EXHIBIT S PERMANENT MAN-MADE STRUCTURES RULE 1.6.2(1)(B) RULE 6.5 GEOTECHNICAL STABILITY EXHIBIT Marcovich Gravel Pit May 2024 © Lewicki 8i Associates INTRODUCTION The proposed Marcovich Mining Resource is located just west of U.S. Highway 85 and southwest of the city limits of Fort Lupton in Weld County, CO. The property is bound by the South Platte River to the west. Asphalt Specialties Co., Inc. (Asphalt Specialties) is both the permittee and operator of the proposed aggregate mining operation. The site contains a group of agricultural fields, a residence, stock watering ponds, and agriculture related buildings. Mining access to the site will be via an easement across the agricultural parcel to the south and into the Asphalt Specialties Chavers Mining Resource (M-2015-030). Asphalt Specialties is proposing that the site be converted to a gravel pit to feed raw materials to their processing and sales point at the Chavers Mining Resource. The permit area of this operation will be 57.28 acres. The affected area will be 44.3 acres. Reclamation will convert the site to water storage ponds surrounded by rangeland. A portion of the ponds may be refilled based on market conditions for inert fill disposal. The proposed operation at the Marcovich Mining Resource will consist of mining sand and gravel, then transporting material to the Chavers Mining Resource. Processing of the extracted materials at the Chavers Mining Resource will include crushing, screening, washing, and the use of concrete and asphalt plants. Marcovich Gravel Pit May 2024 i-1 © Lewicki & Associates EXHIBIT A LEGAL DESCRIPTION The site is located southwest of the City of Fort Lupton in Weld County, Colorado. A legal description is shown on Map C-1 which is included in Exhibit C. A general location map is shown in Exhibit B which indicates the mine entrance coordinates. The Marcovich Mining Resource is located southwest of Fort Lupton in Weld County, CO in part of the Northeast 1/4 of the Northwest 1/4 of Section 7, Township 1 North, Range 66 West, of the 6th Principal Meridian (PM) . The legal description of Parcel 147107000015 is as follows: IMPS ONLY PT S2 7 1 66 BEG N0D12'W 1097' OF S4 COR SEC N89D25'E 208.03' TO WLY R/W HWY 85 N03D48'E 1533.02' TO E -W C/L SEC S89D02'W 315.34' S89D02'W 1316.88' S0D10'E 1517.87' N89D25'E 1317.3' TO BEG The parcel contains 55.20 acres more or less. Two temporary easements have been granted to the operation to cross the Sakata Farms Inc. and Ogilvie properties. Both easements are 40 feet wide. The Sakata easement is 1,160 feet long for a total of 1.07 acres. The Ogilvie easement is 1,100 feet long for a total of 1.01 acres. Therefore, the total permit acreage is 57.28 acres. Marcovich Gravel Pit May 2024 A-1 © Lewicki & Associates EXHIBIT B INDEX MAP Fort Lupton Mine Entry: 40.06158 -104.81903 Marcovich Gravel Pit May 2024 B-1 © Lewicki & Associates EXHIBIT C PREMINE AND MINE PLAN MAPS Map C-1 Access Road Map C-2 Current Conditions Map C-3 Mining Plan Map C-4 Cross Sections Marcovich Gravel Pit May 2024 C-1 © Lewicki & Associates EXHIBIT D MINING PLAN 1. General Mining Plan The property boundary has been surveyed. Map C-3 outlines the mining plan including the affected area of 44.3 -acre. Sand and gravel will be extracted for use in construction materials such as crushed rock, sand, washed rock, concrete, and asphalt. There is also the possibility of incidental fill dirt production. Access to the mine will be through a new road constructed between the current site and Chavers Mining Resource (M-2015-030). This road has been included in the legal description. The access road has been specifically designed to accommodate mine traffic, with all necessary earthwork for road improvement completed before mining begins. To prevent groundwater infiltration into the pit and facilitate water storage, a slurry wall will be installed around the mining area. Dozers and scrapers will strip topsoil and overburden from mining areas, storing them in designated stockpiles. Any stockpile remaining for over 90 days will be seeded to prevent erosion. During pre -mine stripping, all existing buildings, except the manufactured home and garages, will be demolished, and debris will be entirely removed from the site. Sand and gravel extraction will involve loaders, excavators, dozers, and trucks, with material transported to Chavers Mining Resource for processing. Backfill materials may be hauled back to this site from the Chavers Mining Resource. While haul trucks are currently anticipated, there is potential for replacement by a conveyor belt in the future. The sand and gravel deposit, averaging 20-23 feet in thickness, will be mined progressively from north to south. Mining and reclamation will occur simultaneously to minimize overall disturbance. There is ample on -site topsoil and overburden for successful reclamation, transforming the site into water storage ponds surrounded by rangeland. The reclamation process will involve backfilling, regrading, topsoiling, and revegetation. Some or all of the water storage pond may be filled based on market demands for inert fill disposal. Mining will extend to the bottom of the gravel deposit, maintaining final mining slopes at 1.5H:1V along the perimeter. The active highwall will have a near -vertical slope, progressing halfway down the final mining slope to enable the dozer to knock down the remaining highwall, creating the completed mining slope. Slopes will then be backfilled with sand or overburden to achieve the reclaimed 3H:1V slopes, with specific slope details available on Map C-4 cross sections. No blasting will occur at the Marcovich Mining Resource. If refuse, acid, or toxic materials are unexpectedly encountered, these materials will be removed from the site and disposed of appropriately. Marcovich Gravel Pit May 2024 D-1 © Lewicki & Associates 2. Mining Timetable Mining operations at the Marcovich Mining Resource are expected to take approximately 7.3 years to complete, based on an annual average production of 700,000 tons. Actual production rates will fluctuate based on market conditions. An approximate mining timetable based on this production and the phased mining plan is shown in Table D-1. Table D-1 Mining Timetable Description Construction of access road and slurry wall. Time Required 2 months Initial stripping of Northern Phase. 1 month Mine and reclaim Northern Phase according to approved plans. Reclamation occurs as mining has reached its maximum extents in an area. 3 years Initial stripping of Southern Phase. 1 month Mine and reclaim Southern Phase according to approved plans. Reclamation occurs as mining has reached its maximum extents in an area. 3 years Total 7.3 years 3. Mine Facilities and Operation The site will contain the following facilities and equipment: Facilities: - Portable toilet - Mine office (portable) - Portable fuel storage Equipment: - Front-end loaders - Bulldozers - Scrapers - Haul trucks (off highway) - Water trucks - Graders - Excavators - Conveyors Asphalt Specialties will provide portable toilets and bottled water to employees on site during operations. Any fuel stored on site will have full secondary containment that can carry 110% of the fuel tank volume. All facilities will be removed during reclamation. Marcovich Gravel Pit May 2024 D-2 © Lewicki & Associates 4. Topsoil and Overburden Handling Topsoil averages 0.5-1.5 feet, averaging 1 foot, overlying 2.5 feet of overburden. Topsoil and overburden will be stripped with appropriate earthmoving equipment as deemed suitable for the operation such as front-end loaders, dozers, excavators, and water trucks. Topsoil and overburden will be stockpiled separately onsite in either designated stockpiles, berms, or directly placed to create final reclamation slopes. Stockpiles must be below the elevation of the baseline conditions because the site is nearly entirely within the floodplain. The very first portion of stripping will be hauled from Marcovich to Chavers. After that stripped materials will be directly placed into reclamation or stockpiled on the pit floor. These materials will be directly placed in the designated stockpile areas or berms which can be seen on Map C-3. Stockpiles to be in place longer than 90 days will be seeded with the permanent seed mix to prevent erosion (see Exhibit E for seed mix). An average of one feet of topsoil and 2.5 feet of overburden were assumed to determine the overall material balance shown in Table D-2. Table D-2 Topsoil and Overburden Material Generated During Mining Stripping Area (ac) Material Generated (CY) Topsoil 32.1 51,870 Overburden 32.1 129,680 Due to the reclaimed land use as water storage ponds, there will be an excess of topsoil than what is needed for reclamation. This is because the pond makes up the majority of the reclaimed land and does not need to be topsoiled entirely. There is not enough overburden to meet reclamation needs by itself, however, with excess topsoil and potential sand, there is more than enough material on site for reclamation. Excess topsoil and overburden will be used to achieve the final grading shown in the reclamation map in Exhibit F. Overburden, topsoil, and sand will be used to backfill mining slopes to their final reclaimed state. Topsoil will be replaced on all disturbances outside of the ponds and on the pond slopes. It will not be replaced on the pond floor. Topsoil will be replaced in an average two -foot layer to restore the existing soil conditions. Details pertaining to reclamation can be found in Exhibit E and the maps in Exhibit F. 5. Site Access The Marcovich Mining Resource will be accessed via two easements to cross agricultural land to the active Chavers Mining Resource. A 40 -foot wide easement has been granted to the operator. A two lane graveled road will be constructed. This road will remain in place after mining is completed. Easements are shown on map C-1. Marcovich Gravel Pit May 2024 D-3 © Lewicki & Associates 6. Water Information, Rights, and Augmentation All water right issues such as availability of water for this operation, consumption rates, dust control, etc. are presented in Exhibit G — Water Information. 7. Schedule of Operations Mining operations will occur as dictated by demand with an average annual production of 700,000 tons. Mining, screening, and processing will be conducted on site with portable equipment throughout the year. The operator will not have night gravel mining operations, although minor truck activity and repairs may occur after hours. 8. Weld County Impacts and Environmental Impacts All potential county impacts and concerns are addressed in the Weld County Use by Special Review. Marcovich Gravel Pit May 2024 D-4 © Lewicki & Associates EXHIBIT E RECLAMATION PLAN 1. General Reclamation Plan The total affected area to be reclaimed under this permit is 44.3 acres out of the 57.28 -acre permit area. Reclamation of the Marcovich Mining Resource will convert the site to a final land use of a water storage pond and rangeland. Reclamation will occur concurrently with mining. Final reclamation will be completed after mining has finished. The pre -mine land use is predominantly agriculture with one residence. Surroundings land uses include agriculture, open space, and mining. Pursuant to Rule 6.4.5.2(b), the applicant evaluated the post -mine land use in regard to adopted state and local land use plans for this area and adjacent land uses. The proposed post -mine land use of water storage ponds and rangeland is compatible with the general agricultural character of the area. Table E-1 below summarizes the anticipated final land uses within the affected area upon completion of reclamation. The distribution of rangeland and water storage pond may vary based on the market demand for inert backfill storage. Table E-1 Reclamation Areas Description Area (Acres) Rangeland 12.1 Water Storage Pond 26.7 Disturbed Area Total 38.8 Undisturbed Area 18.5 Total Affected Area 57.28 Reclamation will occur concurrently as mining progresses. No more than 1,000 feet of highwall will be unreclaimed at a time. Mining slopes will be backfilled and graded to a maximum 3H:1V slope. The slopes will then be compacted for stabilization and to prevent erosion. All portable facilities and equipment will be removed from the area. All berms will be flattened. The slurry wall will remain during and after reclamation. The pond slopes and any other surrounding disturbances will be topsoiled and seeded for revegetation. Topsoil will be replaced in a two -foot layer to restore the current soil profile. Revegetation will be completed using a native seed mix recommended by the Natural Resource Conservation Service. Revegetation efforts will be monitored following reclamation. The pit will be used for freshwater storage after it has been fully reclaimed and revegetated. There will be more than enough material stockpiled from on -site materials to fulfill reclamation needs as the groundwater lake takes up the majority of the reclamation area. Table E-2 shows the volumes of topsoil and overburden required for reclamation and the material volumes that will be stripped and stockpiled. As shown, there is an excess of topsoil that is stripped versus what is required for reclamation. The stripped overburden does not meet the amount required for backfilling the pits. However, there will be an excess of topsoil and sand that will be more than enough to meet these requirements. These calculations were made assuming that the site Marcovich Gravel Pit May 2024 E-1 © Lewicki & Associates has a uniform one foot of topsoil and 2.5 feet of overburden across all areas. Sand volumes were not calculated as detailed information on their location and thickness were not obtained. No sand volume is assumed for the reclamation volume balance calculations, however, sand is very likely to be encountered. Any sand encountered will either be sold or used to augment the overburden for backfill. Topsoil will be replaced in an average two -foot layer across all non -pond disturbances, while overburden and other excess material will be used to backfill the pit slopes from 1.5H:1V to 3H:1V. Table E-2 Reclamation Volumes Material Available on Site Requirements for Reclamation Reclamation Area Mining Area & Surroundings Area (acres) 32.2 Topsoil Stripped (CY) 51,870 Overburden Stripped (CY) 129,680 Topsoil Required (CY) 30,300 Overburden Backfill Required (CY) 109,278 Excess material will be used for backfilling slopes. Sand that may be encountered will be used for backfilling or will be sold. Asphalt Specialties will keep the minimum amount of material (topsoil, overburden, and potentially sand) required for reclamation throughout the entire mine life. Based on market demand, a portion or all of the area within the slurry wall may be backfilled. If the site is completely or partially backfilled the amount of area reclaimed as dry rangeland will increase. The operator will ensure that material is clean and uncontaminated. They will utilize the same forms as the Chavers Resource because the Chavers resource will act as the processing and sales point for the Marcovich site. 2. Topsoil Replacement An average of one foot of topsoil will be stripped and stockpiled prior to mining. After backfilling and grading has been completed during reclamation, topsoil will be replaced at 0.5 to 1.5 feet, at an average depth of one foot in a manner that is similar to the pre -mine soil profile. Topsoil will only be placed on the pond slopes and other surrounding disturbances. Topsoil will not be replaced on the pond floors. Replaced topsoil will be directly placed by loaders and haul trucks. All topsoiled areas will be disced to aid in root penetration. 3. Haul Roads and Access All internal haul roads will remain following reclamation to support the future land use. Marcovich Gravel Pit May 2024 E-2 © Lewicki & Associates 4. Reclamation Timetable and Sequence The sequence and timing of reclamation can be seen in Table E-4 below. The reclamation schedule is dependent on the rate of mining and fluctuating market demands. The operator will reclaim the site concurrently with the progression of mining to limit the total disturbance. Table E-4 Reclamation Timetable Description Develop and mine Northern Phase Time Required 3 years Develop and mine Southern Phase 3 years Backfill, topsoil, and revegetate remaining disturbances 1 year Vegetation monitoring 2 years Total 9 years 5. Revegetation Plans Seed will be placed in all areas to be vegetated following grading, topsoiling, and discing of the soil. All disturbances that are retopsoiled will be seeded with a Rangeland Seed Mix. The Weld County recommended mix to be used is as follows: 5.1. Rangeland Seed Mix Species Sand Bluestein Sand Lovegrass Indian Ricegrass Prairie Sandreed Green Needlegrass Little Bluestein Yellow Indiangrass Switchgrass Sand Dropseed Total Pounds of pure live seed per acre (drilled) 1.0 2.5 3.0 0.75 1.5 0.75 0.5 1.5 0.5 12.0 Broadcast seeding will be done at double the drill rate. Mulch will be placed at roughly 4000 pounds per acre. Marcovich Gravel Pit May 2024 E-3 © Lewicki & Associates 6. Post Reclamation Site Drainage The site will drain internally following reclamation. All water that enters the site will drain to the water storage pond in the center of the site. Refer to map G-1 for the post reclamation drainage of the site. 7. Revegetation Success Criteria Revegetation will be deemed adequate when erosion is controlled, the vegetation cover matches neighboring wildlife habitat areas, and when it is considered satisfactory according to Division standards. This will be monitored for a minimum of two years following the completion of reclamation. 8. Monitoring Reclamation Success Measures will be employed for the control of any noxious weed species. The objective of this weed management plan is to control undesirable plants on the Marcovich property. Plants identified through the Colorado Noxious Weed Act (C.R.S 35-5.5) and the Weld County Noxious Weed List as undesirable and designated for management within the county will be removed. Any weeds identified as List A species will be eradicated. Other lower listed plants identified as noxious weeds will be managed by control measures. A Weed Control Plan will be utilized as follows: 1) Each April, a weed survey will be taken of the permit area. 2) If any patches or plants have been identified, they will be sprayed by backpack sprayer or 4 -wheeler using chemicals approved for use by the weed control staff of Weld County. 3) After reclamation, weed surveys and spraying will continue until the perennial cover and production of the site have met DRMS requirements and bond release has been obtained. The Division and Weld County staff will be consulted regarding any weed infestation areas and any control measures prior to their initiation. The plan does not contemplate total weed removal on the property. Rather, the goal is to prevent the spread of weeds into uninfected areas as is the primary goal of the Weld County Weed Management Plan. Each year during the mining operation, the permit area will be monitored closely, through which the operator may determine if any additional weeds have grown. If any new species of weeds are found, Weld County and the Division will be consulted in order to formulate the best plan for the new infestation. 8.1. Weed List Weeds listed in Table E-1 will be eradicated or suppressed according to Weld County requirements. Marcovich Gravel Pit May 2024 E-4 © Lewicki & Associates Table E-1. Weld County Weed List Eradication Suppression List A (in Weld County) Cypress Spurge Myrtle Spurge Haire Willow -Herb Purple Loosestrife Japanese Yellow Flag Iris List B (in Weld County) Absinth Wormwood Eurasian Watermilfoil Black Henbane Jointed Goatgrass Bull Thistle Musk Thistle Chamomile species Russian knapweed Chinese Clematis Scotch Thistle Houndstongue Yellow Nutsedge Moth Mullein Bouncingbet Oxeye Daisy Common Tansy Plumeless thistle Dalmation Toadflax Spotted knapweed Dames Rocket Sulfur Cinquefoil Diffuse Knapweed Tamarisk Hoary Cress Wild Caraway Leafy Spurge Yellow Toadflax Perrenial Pepperweed Canada Thistle Russian Olive Common & Cutleaf Thistle List C (in Weld County) Common Mullein Field Bindweed Cheatgrass/Downy Brome Puncturevine/Goatheads Marcovich Gravel Pit May 2024 E-5 © Lewicki & Associates EXHIBIT F RECLAMATION MAPS Map F-1 Reclamation Plan Marcovich Gravel Pit May 2024 F-1 © Lewicki & Associates EXHIBIT G WATER INFORMATION 1. General The Marcovich Mining Resource is within the floodplain and floodway of the South Platte River. There is a return irrigation ditch that traverses from east to west through the center of the site. Stock ponds have been constructed south of this ditch and are filled by return irrigation water from the parcel sound of the permitted area. Mining within the floodway will be conducted with no filling or stockpiling above the natural ground grade. Groundwater is located roughly five feet below the natural grade. All groundwater onsite is part of the South Platte River alluvial aquifer. Prior to mining, a slurry wall will be installed around the perimeter, as shown on Map C-3. These slurry walls will be for the development of water storage reservoirs following reclamation. Asphalt Specialties is committed to protecting the hydrological balance and water quality at the site. 2. Water Quality Protection The primary concerns surrounding water quality protection at the Marcovich Mining Resource site are the potential impacts to the surface and groundwater from sediment, hydraulic fluids, and diesel fuel. Sediment will be controlled through the use of stormwater retention within the disturbance area through the life of the mine. The site will be graded in a manner that maintains all surficial flows within the disturbed area, in turn containing all sediment and unwanted discharges from leaving the site. Hydraulic fluids and diesel fuels will be contained within vehicles that follow best practices of maintenance; these practices include regular inspections of vehicles, hydraulic lines, and any other potential spill sources. Diesel fuel or other oils will not be stored on -site. Any surface water discharges from the site will be sampled in accordance with the NPDES discharge permit. All discharge will be via the approved Outfall, the proposed location of which is shown on Map C-3. Marcovich Gravel Pit May 2024 G-1 © Lewicki & Associates Table G-1. Surface Water Discharge Monitoring Requirements in NPDES Discharge Permit Parameter Flow Monitoring Frequency Instantaneous, Monthly Sample Type In -situ pH 2x/month Grab Total Suspended Solids 2x/month Grab Oil and Grease Visual 2x/month Visual Oil and Grease Contingent on visibility of oil and grease Grab Total Flow Instantaneous, Monthly Calculated Selenium, Potentially Dissolved 2x/month Grab Total Dissolved Solids Quarterly Grab Note: these are the anticipated analytes based on operator experience at similar sites. CDPHE may issue different sampling requirements with the permit. 3. Floodplain The majority of the site is within the 100 -year floodplain and floodway as reported by the Federal Emergency Management Agency. These boundaries are shown in the Exhibit C and F maps. The minimum distance maintained from the South Platte River to excavation activities is 100 feet. Additionally, no stockpiling or filling above the natural grade will occur in the floodway. Overall, the downstream flood impacts should remain the same or be reduced from activity at the site as the removal of material results in more storage space for flood water below the existing grade. A no -rise certification has been provided to Weld County as part of its floodplain development permit. In accordance with the Mile High Flood Control District technical guidelines, inflow/outflow structures will be installed along the riverbank where mining reaches its closest point to the South Platte River. Details of these designs can be seen on Map G-1. In the event of flooding at the site, equipment from the active mining floor will be removed and the pit will be allowed to fill with water. The flooded pit will be pumped only after the flood has subsided. All fuel will be stored at least one foot above the base flood elevation and in sufficient secondary containment with 110% carrying capacity. 4. Wetlands The National Wetlands Inventory aerial -based mapping indicates the presence of wetlands within the permit area. They are however limited to a concrete lined ditch and a settling pond at the end of the ditch. An onsite inventory of potential wetlands will be undertaken before disturbing these areas. Exhibit C and F maps show the NWI mapped wetlands. Marcovich Gravel Pit May 2024 G-2 © Lewicki & Associates 5. Aquifers The only identified aquifer located at the site is the shallow alluvial aquifer of the South Platte River. The depth to this aquifer varies throughout the year but is typically five feet below surface. According to the U.S. Geological Survey's Ground Water Atlas of the United States', the underlying bedrock aquifer is the Laramie Fox Hills Aquifer of the Denver Basin system. The entirety of the Marcovich Mining Resource mining operation will take place in the overlaying alluvium above a shale/siltstone layer; the Laramie Fox Hills Aquifer will not be mined. 6. Surface Water The mining operation will impact surface water in the area through the stormwater runoff that enters the site. Map G-1 shows the drainage patterns and how they are affected throughout the life of the mine. The maps include information on the drainage basins currently, during mining, and post reclamation as well as the drainage directions throughout these stages. The primary concern for surface water protection at the site is preventing the discharge of sediment, oil, and/or hydraulic fluids from the operation areas. Oils and hydraulic fluids are stored on site following the standard best management practices. These practices include the use of secondary containment at fluid storage and transfer points, spill kits, and employee training regarding safe handling practices. Sediment is trapped onsite using controls and best management practices by directing and controlling surface water runoff that enters the disturbed areas. More information on sediment and surface water control is provided below. 6.1. Surface Water Handling One drainage basin collects all stormwater runoff on and around the Marcovich site. This is shown on the Drainage Map. Currently, the area has a series of dams to provide stock watering ponds. Those ponds will be removed prior to mining. 6.1.1. Mining During all phases of mining, surface water runoff will drain to the active pit or reclaimed reservoir. Water collected in the active mining pod will be allowed to evaporate or will be discharge via the approved CDPHE outfall once sediment has settled out. 6.1.2. Post Reclamation The drainage patterns during mining will be retained following reclamation of the site. Any surface water runoff will collect in the reclaimed reservoir. There is enough storage capacity above the anticipated reservoir level and the top of the shore to store the 100 -year storm events. More on those calculations are provided in section 6.2 below. ' https://pubs.usgs.gov/ha/ha730/ch_c/ Marcovich Gravel Pit May 2024 G-3 © Lewicki & Associates 6.1.3. Flood Protection Mining will extend to within 200 feet from the South Platte River as shown on the Drainage Map. Due to this proximity to the river, measures will be taken to protect the riverbank from erosion during a flood event. An inflow and outflow structure will be constructed between the River and the mining pod once mining is within 300 feet of the river. These structures will allow for the safe exchange of flood waters between the pit and river which prevents erosion of the riverbank and pitside slope during flood events. These structures are of a design approved for use by the Mile High Flood District. Details of the inflow/outflow structure are shown on Map F-2. 6.2. Disturbed Area Runoff During all stages of mining, there is enough water storage capacity to contain the 5 -year and 100 -year 24 -hour storm events and prevent erosion from surface water discharge. The expected rainfall from these events at the Marcovich Site is provided in Table G-2 below. Table G-2. Area Storm Events (from NOAA2) Event Probability Event Rainfall (inches) 5-YR 24 -HR 100-YR 24 -HR 2.29 4.64 The peak runoff was generated from these values for the three drainage basins during all stages of mining. Pre -mine, mining, and reclamation conditions are delineated on the Drainage Map. The discharge volumes from these storm events are calculated in Appendix G-1 at the end of this exhibit. Table G-3 summarizes the runoff volumes and storage volumes for each drainage. All drainage calculations were made using the Rational Method identified in the Mile High Flood Control District. Drainage Basin 1 Site Condition Base Table G-3. Drainage Calculations Area (ac) Curve Number 44.0 70 100-Yr 24 -Hr Discharge Runoff (ac -ft) Flow Rate (gpm)* 6.55 0 Detention Capacity (ac -ft)*** N/A Mine 44.0 82 10.3 1000-3000** 820 Reclamation 44.0 89 12.8 0 81.6 * The discharge flow rate is calculated from the peak discharge of the 100-Yr 24 -Hr storm event. **Discharge flow rate is variable and controlled during mining as all discharges are pumped from the pit ***Detention Capacity calculated in CAD as the surface volume above the pit floor (approx. 25 feet @ 32 acres) or water storage pond (approx. 3 feet @ 27 acres). 'National Oceanic and Atmospheric Administration Marcovich Gravel Pit May 2024 G-4 © Lewicki & Associates 7. Groundwater Groundwater is located approximately five feet below the surface at the Marcovich site. This was determined from wells installed onsite. Table G-4 outlines all wells within 600' of the permit area. These well locations are also shown on Map C-2. Groundwater quality data was gathered in advance of mining. This data and discussion of it can be seen in the Groundwater Monitoring Plan in Appendix G-2. Table G-4. Wells Within 600' of Permit Area Total Depth Distance from nearest mining Applicant/Well ID Permit ID (feet) Purpose area (ft) ELIZABETH A WETHINGTON & CO 197906 30 Domestic Stock 600 WETHINGTON, ELIZABETH A 19458 -F -R 34 Irrigation <100 but spotted from quarters EHELNS, WM H 936-WCB 48 Irrigation <100 but spotted from quarters ASPHALT SPECIALTIES CO., INC. 4000003- 29 Monitoring 0 (HUNT, DAN) MH LELL, J 124421 34 Domestic 0 CENTRAL COLO W CONSER DIST 20005-F 41 Other 375 *Lell, J and Asphalt Specialties wells on the property are under the applicant's control. 7.1. Groundwater — Monitoring Plan The operator is in the process of collecting the minimum required five (5) quarters of background data to characterize baseline groundwater conditions prior to the start of mining. To -date, data has been obtained from June 2023 through April 2024. This includes 11 of the 13 monthly groundwater elevations (for groundwater quantity) and four (4) of the five (5) quarterly groundwater sampling events (for groundwater quality). This data, along with INS Table 1 - 4 Groundwater Quality Standards, is presented in Appendix G-2. Once the initial baseline monitoring period is complete (after June 2024), the GWMMP will be submitted to DRMS as a technical revision. 7.2. Groundwater — Mining Prior to mining, a slurry wall will be installed around the perimeter of the pit to prevent groundwater flow into the mining area. Following slurry wall installation, the operator will mine out the pod by dewatering it via the approved CDPHE discharge point. Pumping to conduct this dewatering will take place during the initial mining and then pumping will cease. Stormwater runoff that is collected may be pumped out to protect local water rights, once sediment has settled. For this reason, the CDPHE discharge point will be maintained over the life of the mine. The pump will be located at least two feet below the active mining floor at the lowest point of the pit. It will be surrounded by a gravel filter. This configuration minimizes the risk of sediment being pumped out of the pit. Marcovich Gravel Pit May 2024 G-5 © Lewicki & Associates The typical pit pump location can be seen on Map C-2. 7.3. Groundwater — Reclamation A permanent water storage reservoir will be left behind, as can be seen on Map F-1. There will be no groundwater consumptive use in reclamation. T4. Groundwater — Slurry Wall Impact The installation of a slurry wall within the alluvial aquifer of the South Platte River may create two potential impacts to the aquifer: the creation of local groundwater shadows or mounding that damage neighboring structures or property and the potential exacerbation of regional groundwater impacts. For these reasons, the applicant will submit a groundwater model prior to installation of the slurry wall. If the determined by modelling, a French drain system will be installed to mitigate modelled impacts. 8. Water Related Permits The operator is applying for all necessary permits that have not already been acquired for water handling at the Marcovich Mining Resource. This includes a discharge permit with the Colorado Department of Public Health and Environment and a gravel well permit for initial dewatering of each pod with the Colorado Division of Water Resources. 9. Water Consumption and Source Water for dust control will be the primary consumptive use at the Marcovich Mining Resource site. Water will be purchased from a local source during operations for consumptive uses. No ongoing water consumptive use exists in reclamation, since the water storage pod is lined. This water will be sourced from a freshwater pond in the processing area. This pond will be covered by a gravel well permit. Table G-7 summarizes the estimated water consumption for the operation throughout the year. Marcovich Gravel Pit May 2024 G-6 © Lewicki & Associates Table G-5. Water Consumption Month Jan Dust Control (ac -ft) 0.11 Evaporative Depletions (ac -ft) 0.00 Water Removed from Mining (ac -ft) 0.00 Total (ac -ft) 0.1 Feb 0.12 0.00 0.00 0.1 Mar 0.19 0.00 0.00 0.2 Apr 0.32 0.00 0.00 0.3 May 0.42 0.00 0.00 0.4 Jun 0.51 0.00 0.00 0.5 Jul 0.53 0.00 0.00 0.5 Aug 0.47 0.00 0.00 0.5 Sep 0.35 0.00 0.00 0.4 Oct 0.25 0.00 0.00 0.3 Nov 0.14 0.00 0.00 0.1 Dec 0.11 0.00 0.00 0.1 Total 3.50 0.00 0.00 3.5 The Marcovich Mining Resource sources water for operations via water contract. Any groundwater exposure will be covered by a gravel well permit with the Colorado Division of Water Resources. Marcovich Gravel Pit May 2024 G-7 © Lewicki & Associates Appendix G-1 Hydrology Calculations Marcovich Gravel Pit May 2024 G-8 © Lewicki & Associates 1 Hydrograph Summary Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to Peak (min) Hyd. volume (cuft) Inflow hyd(s) Maximum elevation (ft) Total strge used (cuft) Hydrograph Description 1 SCS Runoff 3.616 2 822 62,045 Baseline 2 SCS Runoff 34.92 2 734 154,571 Mining 3 SCS Runoff 53.17 2 732 229,741 Reclamation C:\Users\Sydney\G LA Dropbox\Sydney ConnoR heFRe ipd Ibf /larcovich\AuFari j\ rdrbOl2 %.gpw 2 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Hyd. No. 1 Baseline Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 5 yrs = 2 min = 43.900 ac = 0.0 = TR55 = 2.29 in = 24 hrs Peak discharge = 3.616 cfs Time to peak = 822 min Hyd. volume = 62,045 cuft Curve number = 71* Hydraulic length = 0 ft Time of conc. (Tc) = 146.80 min Distribution = Type II Shape factor = 484 Composite (Area/CN) = [(0.900 x 100) + (2.300 x 30) + (11.600 x 49) + (5.000 x 89) + (21.900 x 80) + (2.200 x 86)] / 43.900 Q (cfs) 4.00 _ 3.00 2.00 1.00 0.00 Baseline Hyd. No. 1 -- 5 Year A 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 1680 Hyd No. 1 Q (cfs) 4.00 3.00 2.00 1.00 Time (min) 3 TR55 Tc Worksheet Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. 1 Baseline Description Sheet Flow Manning's n -value Flow length (ft) Two-year 24 -hr precip. (in) Land slope (%) Travel Time (min) Shallow Concentrated Flow Flow length (ft) Watercourse slope (%) Surface description Average velocity (ft/s) Travel Time (min) Channel Flow X sectional flow area (sqft) Wetted perimeter (ft) Channel slope (%) Manning's n -value Velocity (ft/s) A B C = 0.011 0.011 0.011 = 0.0 0.0 0.0 = 0.00 0.00 0.00 = 0.00 0.00 0.00 Totals = 0.00 + 0.00 + 0.00 = 0.00 = 1333.00 = 0.01 = Unpaved =0.15 0.00 0.00 Unpaved 0.00 0.00 0.00 Paved 0.00 = 146.79 + 0.00 + 0.00 = 146.79 = 0.00 = 0.00 = 0.00 = 0.015 =0.00 0.00 0.00 0.00 0.015 0.00 0.00 0.00 0.00 0.015 0.00 Flow length (ft) ({0})0.0 0.0 0.0 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Total Travel Time, Tc 146.80 min 4 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Hyd. No. 2 Mining Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 5 yrs = 2 min = 44.010 ac = 0.0 = TR55 = 2.29 in = 24 hrs Peak discharge = 34.92 cfs Time to peak = 734 min Hyd. volume = 154,571 cuft Curve number = 84* Hydraulic length = 0 ft Time of conc. (Tc) = 32.30 min Distribution = Type II Shape factor = 484 Composite (Area/CN) = [(33.400 x 89) + (0.510 x 100) + (3.900 x 49) + (6.200 x 80)] / 44.010 Q (cfs) 35.00 _ 30.00 25.00 20.00 15.00 10.00 5.00 0.00 Mining Hyd. No. 2 -- 5 Year 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 2 Q (cfs) 35.00 30.00 25.00 20.00 15.00 10.00 5.00 Time (min) 5 TR55 Tc Worksheet Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. 2 Mining Description Sheet Flow Manning's n -value Flow length (ft) Two-year 24 -hr precip. (in) Land slope CD/o) Travel Time (min) Shallow Concentrated Flow Flow length (ft) Watercourse slope (%) Surface description Average velocity (ft/s) Travel Time (min) Channel Flow X sectional flow area (sqft) Wetted perimeter (ft) Channel slope (%) Manning's n -value Velocity (ft/s) A B C = 0.011 0.011 0.011 = 0.0 0.0 0.0 = 0.00 0.00 0.00 = 0.00 0.00 0.00 Totals = 0.00 + 0.00 + 0.00 = 0.00 = 295.00 = 0.01 = Unpaved =0.15 0.00 0.00 Paved 0.00 0.00 0.00 Paved 0.00 = 32.30 + 0.00 + 0.00 = 32.30 = 0.00 0.00 0.00 = 0.00 0.00 0.00 = 0.00 0.00 0.00 = 0.015 0.015 0.015 =0.00 0.00 0.00 Flow length (ft) ({0})0.0 0.0 0.0 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Total Travel Time, Tc 32.30 min 6 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Hyd. No. 3 Reclamation Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 5 yrs = 2 min = 44.000 ac = 0.0 = TR55 = 2.29 in = 24 hrs Peak discharge = 53.17 cfs Time to peak = 732 min Hyd. volume = 229,741 cuft Curve number = 91* Hydraulic length = 0 ft Time of conc. (Tc) = 32.30 min Distribution = Type II Shape factor = 484 Composite (Area/CN) = [(30.800 x 100) + (3.100 x 80) + (3.900 x 49) + (6.200 x 80)] / 44.000 Q (cfs) 60.00 _ 50.00 40.00 30.00 20.00 10.00 0.00 Reclamation Hyd. No. 3 -- 5 Year 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 3 Q (cfs) 60.00 50.00 40.00 30.00 20.00 10.00 Time (min) 7 TR55 Tc Worksheet Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. 3 Reclamation Description Sheet Flow Manning's n -value Flow length (ft) Two-year 24 -hr precip. (in) Land slope CD/o) Travel Time (min) Shallow Concentrated Flow Flow length (ft) Watercourse slope (%) Surface description Average velocity (ft/s) Travel Time (min) Channel Flow X sectional flow area (sqft) Wetted perimeter (ft) Channel slope (%) Manning's n -value Velocity (ft/s) A B C = 0.011 0.011 0.011 = 0.0 0.0 0.0 = 0.00 0.00 0.00 = 0.00 0.00 0.00 Totals = 0.00 + 0.00 + 0.00 = 0.00 = 295.00 = 0.01 = Unpaved =0.15 0.00 0.00 Paved 0.00 0.00 0.00 Paved 0.00 = 32.30 + 0.00 + 0.00 = 32.30 = 0.00 0.00 0.00 = 0.00 0.00 0.00 = 0.00 0.00 0.00 = 0.015 0.015 0.015 =0.00 0.00 0.00 Flow length (ft) ({0})0.0 0.0 0.0 Travel Time (min) = 0.00 + 0.00 + 0.00 = 0.00 Total Travel Time, Tc 32.30 min 8 Hydrograph Summary Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Hyd. No. Hydrograph type (origin) Peak flow (cfs) Time interval (min) Time to Peak (min) Hyd. volume (cuft) Inflow hyd(s) Maximum elevation (ft) Total strge used (cuft) Hydrograph Description 1 SCS Runoff 22.10 2 804 293,712 Baseline 2 SCS Runoff 110.12 2 732 476,024 Mining 3 SCS Runoff 132.76 2 732 587,562 Reclamation C:\Users\Sydney\G LA Dropbox\Sydney ConnoR hsff'le8ipdcithOlO rcovich\AuFari j\ rdrbOl202%.gpw 9 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Hyd. No. 1 Baseline Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 100 yrs = 2 min = 43.900 ac = 0.0 = TR55 = 4.64 in = 24 hrs Peak discharge = 22.10 cfs Time to peak = 804 min Hyd. volume = 293,712 cuft Curve number = 71* Hydraulic length = 0 ft Time of conc. (Tc) = 146.80 min Distribution = Type II Shape factor = 484 Composite (Area/CN) = [(0.900 x 100) + (2.300 x 30) + (11.600 x 49) + (5.000 x 89) + (21.900 x 80) + (2.200 x 86)] / 43.900 Q (cfs) 24.00 _ 20.00 16.00 12.00 8.00 4.00 0.00 Baseline Hyd. No. 1 -- 100 Year 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 1680 Hyd No. 1 Q (cfs) 24.00 20.00 16.00 12.00 8.00 4.00 Time (min) 10 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Hyd. No. 2 Mining Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 100 yrs = 2 min = 44.010 ac = 0.0 = TR55 = 4.64 in = 24 hrs Peak discharge = 110.12 cfs Time to peak = 732 min Hyd. volume = 476,024 cuft Curve number = 84* Hydraulic length = 0 ft Time of conc. (Tc) = 32.30 min Distribution = Type II Shape factor = 484 Composite (Area/CN) = [(33.400 x 89) + (0.510 x 100) + (3.900 x 49) + (6.200 x 80)] / 44.010 Q (cfs) 120.00 _ 100.00 80.00 60.00 40.00 20.00 0.00 Mining Hyd. No. 2 -- 100 Year 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 2 Q (cfs) 120.00 100.00 80.00 60.00 40.00 20.00 Time (min) 11 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Hyd. No. 3 Reclamation Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 100 yrs = 2 min = 44.000 ac = 0.0 = TR55 = 4.64 in = 24 hrs Peak discharge = 132.76 cfs Time to peak = 732 min Hyd. volume = 587,562 cuft Curve number = 91* Hydraulic length = 0 ft Time of conc. (Tc) = 32.30 min Distribution = Type II Shape factor = 484 Composite (Area/CN) = [(30.800 x 100) + (3.100 x 80) + (3.900 x 49) + (6.200 x 80)] / 44.000 Q (cfs) 140.00 _ 120.00 100.00 80.00 60.00 40.00 20.00 0.00 Reclamation Hyd. No. 3 -- 100 Year \its.44.46""*''''r"--------'1-----,..._ 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 3 Q (cfs) 140.00 120.00 100.00 80.00 60.00 40.00 20.00 Time (min) 12 Hydraflow Rainfall Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2022 Friday, 03 / 1 / 2024 Return Period (Yrs) Intensity -Duration -Frequency Equation Coefficients (FHA) B D E (N/A) 1 0.0000 0.0000 0.0000 2 69.8703 13.1000 0.8658 3 0.0000 0.0000 0.0000 5 79.2597 14.6000 0.8369 10 88.2351 15.5000 0.8279 25 102.6072 16.5000 0.8217 50 114.8193 17.2000 0.8199 100 127.1596 17.8000 0.8186 File name: SampleFHA.idf Intensity = B / (Tc + D)AE Return Period Intensity Values (in/hr) (Yrs) 5 min 10 15 20 25 30 35 40 45 50 55 60 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2 5.69 4.61 3.89 3.38 2.99 2.69 2.44 2.24 2.07 1.93 1.81 1.70 3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5 6.57 5.43 4.65 4.08 3.65 3.30 3.02 2.79 2.59 2.42 2.27 2.15 10 7.24 6.04 5.21 4.59 4.12 3.74 3.43 3.17 2.95 2.77 2.60 2.46 25 8.25 6.95 6.03 5.34 4.80 4.38 4.02 3.73 3.48 3.26 3.07 2.91 50 9.04 7.65 6.66 5.92 5.34 4.87 4.49 4.16 3.88 3.65 3.44 3.25 100 9.83 8.36 7.30 6.50 5.87 5.36 4.94 4.59 4.29 4.03 3.80 3.60 Tc = time in minutes. Values may exceed 60. Precip. file name: C:\Users\Sydney\Dropbox (GLA)\Elam\Delta Paving \AutoCAD\Hydrology\Precipitation.pcp Storm Distribution Rainfall Precipitation Table (in) 1-yr 2-yr 3-yr 5-yr 10-yr 25-yr 50-yr 100-yr SCS 24 -hour 0.00 0.00 0.00 2.29 2.74 3.43 4.01 4.64 SCS 6 -Hr 0.00 0.00 0.00 1.61 1.99 2.60 3.13 3.73 Huff -1st 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff -2nd 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff -3rd 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff -4th 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-Indy 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Custom 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Appendix G-2 Groundwater Quality Monitoring Plan Marcovich Gravel Pit May 2024 © Lewicki & Associates Marcovich Mining Resource Monitoring Well Construction Information and Groundwater Well Elevations June 2023 - April 2024 (To -Date) Well Consturction Information MW -1 MW -2 TOC (ft amsl) 4910.61 4908.94 Ground (ft amsl) 4907.77 4905.79 Stick-up (ft ags) 2.84 3.15 Total Depth (ft bgs) 29.38 34.64 Table 1 Month & Year MW -1 MW -2 SWL TOC (ft) SWL (ft bgs) GW Elev. (ft amsl) SWL TOC (ft) SWL (ft bgs) GW Elev. (ft amsl) Baseline Collection Period: June 2023 through June 2024 June 2023 6.59 3.75 4904.02 5.67 2.52 4903.27 July 2023 7.00 4.16 4903.61 7.09 3.94 4901.85 August 2023 7.60 4.76 4903.01 7.79 4.64 4901.15 September 2023 7.98 5.14 4902.63 7.95 4.80 4900.99 October 2023 7.64 4.80 4902.97 7.74 4.59 4901.20 November 2023 7.96 5.12 4902.65 8.08 4.93 4900.86 December 2023 8.23 5.39 4902.38 8.27 5.12 4900.67 January 2024 8.62 5.78 4901.99 8.52 5.37 4900.42 February 2024 8.63 5.79 4901.98 8.46 5.31 4900.48 March 2024 8.35 5.51 4902.26 7.87 4.72 4901.07 April 2024 8.62 5.78 4901.99 8.33 5.18 4900.61 Groundwater Elevation (High) 6.59 3.75 4904.02 5.67 2.52 4903.27 Groundwater Elevation (Low) 8.63 5.79 4901.98 8.52 5.37 4900.42 GW Elevation Difference (ft) = 2.04 2.85 Notes: ags = above ground surface amsl = above mean sea level bgs = below ground surface ft = feet SWL = Static Water Level TOC = Top of Casing Marcovich Mining Resource Interim Narrative Standards (INS) Table 1- 4 Groundwater Quality Standards Table 2 Analytes CAS No. Units INS Table 1 INS Table 2 INS Table 3 INS Table 4 Lowest INS Tables 1 -4 Groundwater Quality Standards Domestic Water Supply: Human Health Standards Domestic Water Supply: Drinking Water Standards Agricultural Standards TDS Water Quaity Standards Dissolved Aluminum 7429-90-5 mg/L -- -- 5 -- 5 Antimony 7440-36-0 mg/L 0.006 -- -- -- 0.006 Arsenic 7440-38-2 mg/L 0.01 -- 0.1 -- 0.01 Barium 7440-39-3 mg/L 2 -- -- -- 2 Beryllium 7440-41-7 mg/L 0.004 -- 0.1 -- 0.004 Boron 7440-42-8 mg/L -- -- 0.75 -- 0.75 Cadmium 7440-43-9 mg/L 0.005 -- 0.01 -- 0.005 Chloride 16887-00-6 mg/L -- 250 -- -- 250 Chromium (Total) [Cr(III) + Cr(VI)] 7440-47-3 mg/L 0.1 -- 0.1 -- 0.1 Cobalt 7440-48-4 mg/L -- -- 0.05 -- 0.05 Copper 7440-50-8 mg/L -- 1 0.2 -- 0.2 Flouride 16984-48-8 mg/L 4 -- 2 -- 2 Iron 7439-89-6 mg/L -- 0.3 5 -- 0.3 Lead 7439-92-1 mg/L 0.05 -- 0.1 -- 0.05 Lithium 7439-93-2 mg/L -- -- 2.5 -- 2.5 Manganese 7439-96-5 mg/L -- 0.05 0.2 -- 0.05 Molybdenum 7439-98-7 mg/L 0.21 -- -- -- 0.21 Nickel 7440-02-0 mg/L 0.1 -- 0.2 -- 0.1 Nitrate (NO3) 14797-55-8 mg/L 10 -- -- -- 10 Nitrite (N02) 14797-65-0 mg/L 1 -- 10 -- 1 Nitrate -Nitrite, Total (NO2+NO3) -- mg/L 10 -- 100 -- 10 Selenium 7782-49-2 mg/L 0.05 -- 0.02 -- 0.02 Silver 7440-22-4 mg/L 0.05 -- -- -- 0.05 Sulfate 14808-79-8 mg/L -- 250 -- -- 250 Thallium 7440-28-0 mg/L 0.002 -- -- -- 0.002 Total Dissolved Solids (TDS) 10-33-3 mg/L -- -- -- Based on Result 1.25 x Background Uranium 7440-61-1 mg/L 0.03 -- -- -- 0.03 Vanadium 7440-62-2 mg/L -- -- 0.1 -- 0.1 Zinc 7440-66-6 mg/L -- 5 2 -- 2 Other pH -- mg/L -- 6.5 - 8.5 6.5 - 8.5 -- 6.5 - 8.5 Notes: = Lowest INS Table 1 - 4 Standard All samples are filtered through 0.45 micron filter prior to preservation Parameters Excluded from Groundwater Monitoring Program: INS Table 1 INS Table 2 INS Table 3 INS Table 4 Total Coliforms (30 day average) Chlorophenol Mercury None Total Coliforms (max in 30 days) Color Asbestos Corrosivity Cyanide [Free] Foaming Agents Mercury Odor Gross Alpha Particle Activity Phenol Beta and Photon Emitters Marcovich Mining Resource Baseline Groundwater Quality Results First Four (4) Quarters of Data Available 2nd Quarter 2023 - 1st Quarter 2024 Analyte/Parameters CAS No. Sample Event: 1st Quarter Background Sampling Event 2nd Quarter Background Sampling Event 3rd Quarter Background Sampling Event 4th Quarter Background Sampling Event Well Type: Up -gradient Down -gradient Up -gradient Down -gradient Up -gradient Down -gradient Up -gradient Down -gradient Sample ID: MW -1 MW -1D MW -2 MW -1 MW -2 MW -2D MW -1 MW -1D MW -2 MW -1 MW -2 MW -2D Date: 6/30/2023 6/30/2023 6/30/2023 9/27/2023 9/27/2023 9/27/2023 12/14/2023 12/14/2023 12/14/2023 3/28/2024 3/28/2024 3/28/2024 Type: Grab QA/QC Grab Grab Grab QA/QC Grab QA/QC Grab Grab Grab QA/QC Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L Dissolved Aluminum 7429-90-5 mg/L 0.017 0.019 0.015 0.003 0.002 0.003 0.004 0.004 0.008 0.003 0.003 0.004 Antimony 7440-36-0 mg/L 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U 0.0012 U Arsenic 7440-38-2 mg/L 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U 0.0006 U Barium 7440-39-3 mg/L 0.0867 0.086 0.0886 0.0955 0.1046 0.1052 0.0986 0.0942 0.0738 0.0958 0.0769 0.0782 Beryllium 7440-41-7 mg/L 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U Boron 7440-42-8 mg/L 0.33 0.32 0.3 0.29 0.27 0.28 0.2 0.2 0.16 0.28 0.21 0.2 Cadmium 7440-43-9 mg/L 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U Chloride 16887-00-6 mg/L 201.2 201.99 223.45 201 274 274 200 203 201 213 200 200 Chromium (Total) [Cr(III) + Cr(VI)] 7440-47-3 mg/L 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U Cobalt 7440-48-4 mg/L 0.0003 0.0002 0.0011 0.0002 0.0004 0.0004 0.0002 0.0002 0.0003 0.0002 0.0002 0.0002 Copper 7440-50-8 mg/L 0.0018 0.002 0.0019 0.0016 0.0017 0.0018 0.0017 0.0015 0.0015 0.0011 0.0012 0.0013 Flouride 16984-48-8 mg/L 1.18 1.18 1.25 1.26 1.14 1.16 1.11 1.14 1.01 1.16 1.06 1.05 Iron 7439-89-6 mg/L 0.005 U 0.005 U 0.009 0.005 U 0.005 U 0.005 U 0.005 U 0.005 U 0.006 0.005 U 0.005 U 0.005 Lead 7439-92-1 mg/L 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U 0.0001 U Lithium 7439-93-2 mg/L 0.033 0.033 0.028 0.046 0.042 0.045 0.039 0.039 0.032 0.037 0.028 0.028 Manganese 7439-96-5 mg/L 0.0144 0.0148 0.0041 0.0008 U 0.0025 0.0027 0.0008 U 0.0008 U 0.0015 0.0008 U 0.0009 0.0008 U Molybdenum 7439-98-7 mg/L 0.0099 0.0102 0.004 0.0058 0.0033 0.0036 0.0056 0.0056 0.0024 0.004 0.0024 0.0023 Nickel 7440-02-0 mg/L 0.0029 0.003 0.0027 0.0021 0.0024 0.0026 0.002 0.002 0.0018 0.0019 0.0017 0.0016 Nitrate (NO3) 14797-55-8 mg/L 19.37 19.48 14.96 15.3 13.8 13.6 15.5 15.9 12 11.9 14.6 14.5 Nitrite (NO2) 14797-65-0 mg/L 0.3 U 0.3 U 0.3 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U Nitrate -Nitrite, Total (NO2 +NO3) -- mg/L 19.37 19.48 14.96 15.3 13.8 13.6 15.5 15.9 12 11.9 14.6 14.5 Selenium 7782-49-2 mg/L 0.0033 0.0041 0.0037 0.0023 0.0039 0.0035 0.0025 0.0023 0.002 0.001 0.0016 0.0013 Silver 7440-22-4 mg/L 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U 0.0005 U Sulfate 14808-79-8 mg/L 249.51 251.21 286.72 264 292 290 236 240 223 579 210 210 Thallium 7440-28-0 mg/L 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U 0.0002 U Total Dissolved Solids (TDS) 10-33-3 mg/L 1160 1187 1087 1006 1254 1192 1150 1112 904 1142 956 964 Uranium 7440-61-1 mg/L 0.0199 0.019 0.0219 0.0159 0.0104 0.0115 0.0114 0.0091 0.0049 0.0185 0.0072 0.009 Vanadium 7440-62-2 mg/L 0.001 U 0.001 U 0.001 0.001 0.001 0.001 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U Zinc 7440-66-6 mg/L 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.001 0.001 Other pH -- su 7.0 7.0 6.9 7.3 7.0 7.0 6.9 7.0 6.7 7.0 6.8 6.8 Notes: Bold BKG INS mg/L POC su U WQCC = Marcovich Site -Specific Groundwater Quality Standard value (to -date) = Background concentration result exceeds lowest applicable INS Tables 1 - 4 standard = Highest Background TDS value = Concentration detected above reporting limit = Calculated Value (Per WQCC Regulation No. 41, for Background TDS Value between 501 - 10,000 mg/L, the Maximum Allowable TDS Concentration is 1.25 times the background value) = Background = Interim Narrative Standard = milligrams per liter = Point of Compliance = standard unit = Analyte not detected above reporting limit = Water Quality Control Commission Table 3 Appendix G-3 Groundwater Model Marcovich Gravel Pit May 2024 © Lewicki & Associates EXHIBIT H WILDLIFE INFORMATION 1. Introduction Given the location of the Marcovich Mining Resource just south of Fort Lupton, adjacent to the highway, and surrounded by an abundance of gravel pits and agricultural fields, it is safe to assume that wildlife habitat fragmentation has already occurred. Colorado Parks and Wildlife (CPW) habitat and range mapping has been used to develop this wildlife analysis. The CPW will be consulted as part of the mine permitting process. 2. Description of Significant Wildlife Resources on the Affected Land The affected land is within seasonal and general range of a few non -endangered species. There are no bald eagle nests within 5,000 feet of the site, but the site is considered part of a few bald eagle ranges: summer forage, winter forage, and winter concentration. The affected area is within the mule deer corridor and their severe and normal winter range. The site is not near any mule deer migration corridors or highway crossings. The site is also within the white-tailed deer concentration area and winter range. 3. Seasonal Use of the Area Bald eagles make use of the site as summer and winter forage, as well as a winter concentration area. Mule deer and white-tailed deer use the site as winter range. All other significant wildlife resources are year-round in their usage. 4. Presence and Estimated Population of Threatened or Endangered Species No federally listed threatened and endangered species and/or habitat were identified on the or immediately surrounding the affected land. 5. Effect of Proposed Operation on Existing Wildlife Impacts on wildlife use from the proposed project would include direct temporary elimination of potential habitat within the affected area during mining, and temporary localized displacement associated with additional noise and lighting from the proposed project. This localized loss of habitat would not disrupt regional migration or significant movement patterns and would not threaten the overall health and viability of any species. Nearby lands are also disturbed for Marcovich Gravel Pit May 2024 H-1 © Lewicki & Associates similar uses, and as such, the Marcovich Mining Resource will not cause a significant impact on the local area's wildlife habitat. The affected area will be fully reclaimed at the conclusion of mining which will restore some degree of wildlife habitat over time. Concurrent reclamation and phased mining will also help to reduce the total impact on wildlife. Transformation of the bulk of the agricultural fields onsite into water storage ponds will be a permanent change in overall habitat. 6. Impacts to Fish Mining will not take place in any water ways or natural lakes. Surface water controls will protect offsite drainages and fish habitats from sediment discharges. Asphalt Specialties will not stock the reclaimed lake with non-native species at any time. Marcovich Gravel Pit May 2024 H-2 © Lewicki & Associates EXHIBIT I 1. General SOILS INFORMATION A soil report was generated using the United States Department of Agriculture's NRCS Web Soil Survey (WSS)3 and is included in this exhibit as Appendix I-1 at the end of this exhibit. The WSS provides soil data and information produced by the National Cooperative Soil Survey. The majority of the site's soil consists of aquolls and aquents with a gravelly substratum in the eastern area, and the Ellicott -Ellicott sandy skeletal complex in the western area along the river (see Map C-1). The A -horizon of the soil profile was used as the basis for determining the topsoil stripping depth during mining operations. These primary soil types that exist at the site are described as follows. 2. Suitability for Reclamation Revegetation The two main soil types provide an average of two feet of suitable material for revegetation. The soil in the east (3-Aquolls and Aquents) is not considered prime farmland, but the soil in the west (10 -Ellicott -Ellicott sandy -skeletal complex) is considered prime farmland if irrigated. As the majority of the site will be reclaimed to a pond, converting the land back to agriculture is not considered for reclamation. However, the soil should be suitable to be used for rangeland as portions of the site currently are rangeland. Revegetating disturbances as rangeland will also complement the reclaimed land use of open space. 3. Soil Type Descriptions 3—Aquolls and Aquents, gravelly substratum Map Unit Setting National map unit symbol: 3627 Elevation: 4,000 to 7,200 feet Mean annual precipitation: 12 to 18 inches Mean annual air temperature: 45 to 55 degrees F Frost -free period: 80 to 155 days Farmland classification: Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Map Unit Composition Aquolls and similar soils:55 percent Aquents, gravelly substratum, and similar soils:30 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Aquolls Setting Landform: Swales, flood plains, streams Down -slope shape: Linear 3 https://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm. Marcovich Gravel Pit May 2024 1-1 © Lewicki & Associates Across -slope shape: Linear Parent material: Recent alluvium Typical profile H1 - 0 to 48 inches: loam H2 - 48 to 60 inches: gravelly sand Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high (0.20 to 2.00 in/hr) Depth to water table: About 6 to 48 inches Frequency of flooding: FrequentNone Frequency of ponding: None Maximum salinity: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 8.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6w Hydrologic Soil Group: D Ecological site: R067BY035CO - Salt Meadow Hydric soil rating: Yes Description of Aquents, Gravelly Substratum Setting Landform:S tream terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Recent alluvium Typical profile H1 - 0 to 48 inches: variable H2 - 48 to 60 inches: very gravelly sand Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat):Moderately high to very high (0.57 to 19.98 in/hr) Depth to water table: About 6 to 24 inches Frequency of flooding: Frequent None Frequency of ponding: None Calcium carbonate, maximum content:10 percent Maximum salinity: Nonsaline to moderately saline (0.0 to 8.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.6 inches) Interpretive groups Land capability classification (irrigated): 6w Land capability classification (nonirrigated): 6w Hydrologic Soil Group: D Ecological site: R067BY035CO - Salt Meadow Hydric soil rating: Yes Minor Components Bankard Percent of map unit:10 percent Hydric soil rating: No Ustic torrifluvents Marcovich Gravel Pit May 2024 1-2 © Lewicki & Associates Percent of map unit:5 percent Hydric soil rating: No 10 —Ellicott -Ellicott sandy -skeletal complex, 0 to 3 percent slopes, rarely flooded Map Unit Setting National map unit symbol: 2xsth Elevation: 3,950 to 5,960 feet Mean annual precipitation: 13 to 17 inches Mean annual air temperature: 50 to 54 degrees F Frost -free period: 135 to 165 days Farmland classification: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Ellicott, rarely flooded, and similar soils:65 percent Ellicott sandy -skeletal, rarely flooded, and similar soils:25 percent Minor components:10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ellicott, Rarely Flooded Setting Landform: Drainageways, flood plains on intermittent streams Down -slope shape: Linear Across -slope shape: Concave Parent material: Noncalcareous, stratified sandy alluvium Typical profile A - 0 to 4 inches: sand AC - 4 to 13 inches: sand Cl - 13 to 30 inches: sand C2 - 30 to 44 inches: sand C3 - 44 to 80 inches: coarse sand Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat):High to very high (13.00 to 39.96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: Rare Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Very low (about 2.1 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 7s Hydrologic Soil Group: A Ecological site: R067BY031 CO - Sandy Bottomland Hydric soil rating: No Description of Ellicott Sandy -skeletal, Rarely Flooded Setting Landform: Channels on drainageways, channels on intermittent streams Down -slope shape: Linear Across -slope shape: Concave, linear Parent material: Noncalcareous, stratified sandy alluvium Typical profile A - 0 to 4 inches: very gravelly coarse sand Marcovich Gravel Pit May 2024 1-3 © Lewicki & Associates AC - 4 to 13 inches: very gravelly sand Cl - 13 to 30 inches: very gravelly sand C2 - 30 to 44 inches: very gravelly sand C3 - 44 to 80 inches: very gravelly coarse sand Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat):High to very high (13.00 to 39.96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: Rare Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Very low (about 1.2 inches) Interpretive groups Land capability classification (irrigated): 4s Land capability classification (nonirrigated): 8s Hydrologic Soil Group: A Ecological site: R067BY031 CO - Sandy Bottomland Hydric soil rating: No Minor Components Haverson Percent of map unit:10 percent Landform: Terraces Landform position (three-dimensional):Tread Down -slope shape: Linear Across -slope shape: Linear Ecological site: R067BY036CO Overflow Hydric soil rating: No Marcovich Gravel Pit May 2024 1-4 © Lewicki & Associates Appendix I-1 Soil Report Marcovich Gravel Pit May 2024 1-5 © Lewicki & Associates USDA United States Department of Agriculture N RCS Natural Resources Conservation Service A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Weld County, Colorado, Southern Part February 27, 2024 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://www.nres.usda. gov/wps/portal/nres/detail/soils/contactus/? cid=nres142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents Preface 2 How Soil Surveys Are Made 5 Soil Map 8 Soil Map 9 Legend 10 Map Unit Legend 11 Map Unit Descriptions 11 Weld County, Colorado, Southern Part 13 1—Altvan loam, 0 to 1 percent slopes 13 3—Aquolls and Aquents, gravelly substratum 14 10 —Ellicott -Ellicott sandy -skeletal complex, 0 to 3 percent slopes, rarely flooded 16 19 —Colombo clay loam, 0 to 1 percent slopes 18 21—Dacono clay loam, 0 to 1 percent slopes 19 29—Julesburg sandy loam, 0 to 1 percent slopes 20 75 —Vona sandy loam, 0 to 1 percent slopes 21 76 —Vona sandy loam, 1 to 3 percent slopes 23 85 —Water 24 References 25 4 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil -vegetation -landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil 5 Custom Soil Resource Report scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research. The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas. Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil -landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil -landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape. Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field -observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil. Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date. After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and 6 Custom Soil Resource Report identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately. 7 Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 8 Custom Soil Resource Report Soil Map 40°4'16"N 40° 3' 19" N Map Scale: 1:12,300 if printed on A landscape (11" x 8.5") sheet. S N 0 150 300 0 500 1000 2000 3000 Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84 600 9 515300 515500 515700 515900 516100 516300 40° 4' 16" N 40° 3' 19" N Custom Soil Resource Report MAP LEGEND Area of Interest (AO') Area of Interest (AO') Soils 0 Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot ra Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation +-i-+ Rails Interstate Highways US Routes Major Roads Local Roads Background RS Aerial Photography MAP INFORMATION The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 22, Aug 24, 2023 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 8, 2021 —Jun 12, 2021 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. 10 Custom Soil Resource Report Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 1 Altvan loam, 0 to 1 percent slopes 131.0 19.6% 3 Aquolls and Aquents, gravelly substratum 290.3 43.5% 10 Ellicott -Ellicott sandy -skeletal complex, 0 to 3 percent slopes, rarely flooded 156.5 23.5% 19 Colombo clay loam, 0 to 1 percent slopes 1.1 0.2% 21 Dacono clay loam, 0 to 1 percent slopes 22.0 3.3% 29 Julesburg sandy loam, 0 to 1 percent slopes 6.8 1.0% 75 Vona sandy loam, 0 to 1 percent slopes 13.4 2.0% 76 Vona sandy loam, 1 to 3 percent slopes 25.8 3.9% 85 Water 19.8 3.0% Totals for Area of Interest 666.8 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, 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 dominant 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 for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They 11 Custom Soil Resource Report generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha -Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha -Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. 12 Custom Soil Resource Report Weld County, Colorado, Southern Part 1—Altvan loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 361j Elevation: 4,500 to 4,900 feet Mean annual precipitation: 14 to 16 inches Mean annual air temperature: 46 to 48 degrees F Frost -free period: 130 to 150 days Farmland classification: Not prime farmland Map Unit Composition Altvan and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Altvan Setting Landform: Terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Old alluvium Typical profile H1 - 0 to 10 inches: loam H2 - 10 to 25 inches: clay loam H3 - 25 to 60 inches: gravelly sand Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.20 to 2.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 5 percent Available water supply, 0 to 60 inches: Low (about 5.7 inches) Interpretive groups Land capability classification (irrigated): 3s Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: R067BY002CO - Loamy Plains Hydric soil rating: No Minor Components Cascajo Percent of map unit: 9 percent Hydric soil rating: No 13 Custom Soil Resource Report Aquic haplustolls Percent of map unit: 1 percent Landform: Swales Hydric soil rating: Yes 3—Aquolls and Aquents, gravelly substratum Map Unit Setting National map unit symbol: 3627 Elevation: 4,000 to 7,200 feet Mean annual precipitation: 12 to 18 inches Mean annual air temperature: 45 to 55 degrees F Frost -free period: 80 to 155 days Farmland classification: Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Map Unit Composition Aquolls and similar soils: 55 percent Aquents, gravelly substratum, and similar soils: 30 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Aquolls Setting Landform: Swales, streams, flood plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Recent alluvium Typical profile H1 - 0 to 48 inches: loam H2 - 48 to 60 inches: gravelly sand Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.20 to 2.00 in/hr) Depth to water table: About 6 to 48 inches Frequency of flooding: Frequent Frequency of ponding: None Maximum salinity: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 8.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6w Custom Soil Resource Report Hydrologic Soil Group: D Ecological site: R067BY035CO - Salt Meadow Hydric soil rating: Yes Description of Aquents, Gravelly Substratum Setting Landform: Stream terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Recent alluvium Typical profile H1 - 0 to 48 inches: variable H2 - 48 to 60 inches: very gravelly sand Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat): Moderately high to very high (0.57 to 19.98 in/hr) Depth to water table: About 6 to 24 inches Frequency of flooding: Frequent Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline to moderately saline (0.0 to 8.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.6 inches) Interpretive groups Land capability classification (irrigated): 6w Land capability classification (nonirrigated): 6w Hydrologic Soil Group: D Ecological site: R067BY035CO - Salt Meadow Hydric soil rating: Yes Minor Components Bankard Percent of map unit: 10 percent Hydric soil rating: No Ustic torrifluvents Percent of map unit: 5 percent Hydric soil rating: No Custom Soil Resource Report 10 —Ellicott -Ellicott sandy -skeletal complex, 0 to 3 percent slopes, rarely flooded Map Unit Setting National map unit symbol: 2xsth Elevation: 3,950 to 5,960 feet Mean annual precipitation: 13 to 17 inches Mean annual air temperature: 50 to 54 degrees F Frost -free period: 135 to 165 days Farmland classification: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Ellicott, rarely flooded, and similar soils: 65 percent Ellicott sandy -skeletal, rarely flooded, and similar soils: 25 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ellicott, Rarely Flooded Setting Landform: Flood plains on intermittent streams, drainageways Down -slope shape: Linear Across -slope shape: Concave Parent material: Noncalcareous, stratified sandy alluvium Typical profile A - 0 to 4 inches: sand AC - 4 to 13 inches: sand Cl - 13 to 30 inches: sand C2 - 30 to 44 inches: sand C3 - 44 to 80 inches: coarse sand Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat): High to very high (13.00 to 39.96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: Rare Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Very low (about 2.1 inches) Interpretive groups Land capability classification (irrigated): 4e Custom Soil Resource Report Land capability classification (nonirrigated): 7s Hydrologic Soil Group: A Ecological site: R067BY031 CO - Sandy Bottomland Hydric soil rating: No Description of Ellicott Sandy -skeletal, Rarely Flooded Setting Landform: Channels on intermittent streams, channels on drainageways Down -slope shape: Linear Across -slope shape: Concave, linear Parent material: Noncalcareous, stratified sandy alluvium Typical profile A - 0 to 4 inches: very gravelly coarse sand AC - 4 to 13 inches: very gravelly sand Cl - 13 to 30 inches: very gravelly sand C2 - 30 to 44 inches: very gravelly sand C3 - 44 to 80 inches: very gravelly coarse sand Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat): High to very high (13.00 to 39.96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: Rare Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Very low (about 1.2 inches) Interpretive groups Land capability classification (irrigated): 4s Land capability classification (nonirrigated): 8s Hydrologic Soil Group: A Ecological site: R067BY031 CO - Sandy Bottomland Hydric soil rating: No Minor Components Haverson Percent of map unit: 10 percent Landform: Terraces Landform position (three-dimensional): Tread Down -slope shape: Linear Across -slope shape: Linear Ecological site: R067BY036CO - Overflow Hydric soil rating: No 17 Custom Soil Resource Report 19 —Colombo clay loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 361v Elevation: 4,600 to 4,780 feet Mean annual precipitation: 12 to 16 inches Mean annual air temperature: 48 to 52 degrees F Frost -free period: 130 to 160 days Farmland classification: Prime farmland if irrigated Map Unit Composition Colombo and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Colombo Setting Landform: Terraces, flood plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Stratified, calcareous alluvium Typical profile H1 - 0 to 14 inches: clay loam H2 - 14 to 21 inches: stratified loam to clay loam H3 - 21 to 60 inches: stratified sand to loam to clay loam Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.60 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: High (about 9.4 inches) Interpretive groups Land capability classification (irrigated): 1 Land capability classification (nonirrigated): 3e Hydrologic Soil Group: C Ecological site: R067BY042CO - Clayey Plains Hydric soil rating: No Custom Soil Resource Report Minor Components Nunn Percent of map unit: 5 percent Hydric soil rating: No Heldt Percent of map unit: 5 percent Hydric soil rating: No Dacono Percent of map unit: 5 percent Hydric soil rating: No 21—Dacono clay loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 361y Elevation: 4,550 to 4,970 feet Mean annual precipitation: 14 to 18 inches Mean annual air temperature: 48 to 52 degrees F Frost -free period: 140 to 160 days Farmland classification: Prime farmland if irrigated Map Unit Composition Dacono and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Dacono Setting Landform: Terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Mixed alluvium Typical profile H1 - 0 to 12 inches: clay loam H2 - 12 to 21 inches: clay loam H3 - 21 to 27 inches: clay loam H4 - 27 to 60 inches: very gravelly sand Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.60 in/hr) Depth to water table: More than 80 inches 19 Custom Soil Resource Report Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 15 percent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.3 inches) Interpretive groups Land capability classification (irrigated): 2s Land capability classification (nonirrigated): 3s Hydrologic Soil Group: C Ecological site: R067BY042CO - Clayey Plains Hydric soil rating: No Minor Components Heldt Percent of map unit: 5 percent Hydric soil rating: No Nunn Percent of map unit: 5 percent Hydric soil rating: No Altvan Percent of map unit: 5 percent Hydric soil rating: No 29—Julesburg sandy loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 3626 Elevation: 4,700 to 4,800 feet Mean annual precipitation: 15 to 19 inches Mean annual air temperature: 48 to 52 degrees F Frost -free period: 145 to 155 days Farmland classification: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Julesburg and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Julesburg Setting Landform: Terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: South platte river alluvium 20 Custom Soil Resource Report Typical profile H1 - 0 to 12 inches: sandy loam H2 - 12 to 27 inches: sandy loam H3 - 27 to 60 inches: sand Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High (2.00 to 6.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water supply, 0 to 60 inches: Moderate (about 6.5 inches) Interpretive groups Land capability classification (irrigated): 2s Land capability classification (nonirrigated): 3e Hydrologic Soil Group: A Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No Minor Components Edgar Percent of map unit: 4 percent Hydric soil rating: No Remmit Percent of map unit: 4 percent Hydric soil rating: No Valent Percent of map unit: 4 percent Hydric soil rating: No Vona Percent of map unit: 3 percent Hydric soil rating: No 75 —Vona sandy loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 363v Elevation: 4,650 to 4,950 feet Mean annual precipitation: 13 to 15 inches Mean annual air temperature: 48 to 55 degrees F Frost -free period: 130 to 160 days Farmland classification: Farmland of statewide importance 21 Custom Soil Resource Report Map Unit Composition Vona and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Vona Setting Landform: Terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Alluvium Typical profile H1 - 0 to 6 inches: sandy loam H2 - 6 to 28 inches: fine sandy loam H3 - 28 to 60 inches: sandy loam Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 6.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 15 percent Maximum salinity: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.8 inches) Interpretive groups Land capability classification (irrigated): 3e Hydrologic Soil Group: A Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No Minor Components Remmit Percent of map unit: 11 percent Hydric soil rating: No Olney Percent of map unit: 4 percent Hydric soil rating: No Custom Soil Resource Report 76 —Vona sandy loam, 1 to 3 percent slopes Map Unit Setting National map unit symbol: 363w Elevation: 4,600 to 5,200 feet Mean annual precipitation: 13 to 15 inches Mean annual air temperature: 48 to 55 degrees F Frost -free period: 130 to 160 days Farmland classification: Farmland of statewide importance Map Unit Composition Vona and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Vona Setting Landform: Terraces, plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Alluvium and/or eolian deposits Typical profile H1 - 0 to 6 inches: sandy loam H2 - 6 to 28 inches: fine sandy loam H3 - 28 to 60 inches: sandy loam Properties and qualities Slope: 1 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 6.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 15 percent Maximum salinity: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.8 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: A Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No 23 Custom Soil Resource Report Minor Components Remmit Percent of map unit: 9 percent Hydric soil rating: No Olney Percent of map unit: 3 percent Hydric soil rating: No Julesburg Percent of map unit: 3 percent Hydric soil rating: No 85 —Water Map Unit Composition Water: 95 percent Minor components: 5 percent Estimates are based on observations, descriptions, and transects of the mapunit. Minor Components Aquolls Percent of map unit: 5 percent Landform: Marshes Hydric soil rating: Yes 24 References American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep -water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States. National Research Council. 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/national/soils/?cid=nrcs142p2_054262 Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// www.nres. usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053577 Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http:// www.nres. usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053580 Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. http://www.nres.usda.gov/wps/portal/nres/detail/soils/ home/?cid=nrcs142p2_053374 142 p2_053374 United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/ detail/national/landuse/rangepasture/?cid=stelprdb1043084 25 Custom Soil Resource Report United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430 -VI. http://www.nrcs.usda.gov/wps/portal/ nres/detail/soils/scientists/?cid =nres 142 p2_054242 United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://www.nres.usda.gov/wps/portal/nres/detail/national/soils/? cid=nrcs142p2_053624 United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:// www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf 26 EXHIBIT J VEGETATION INFORMATION 1. Existing Vegetation Community The native vegetation at the Marcovich Mining Resource is mostly limited to the eastern banks of the Platte River and low-lying areas used for stock watering ponds. The remaining portions of the site are agricultural fields. The native vegetation that is present consists of mature cottonwoods galleries with a shrubby midstory. The understory is predominantly dry grasses and shrubs. Some small portions of the site contain dry rangeland vegetation. The remaining areas of the site are agricultural fields which do not contain native vegetation, and will be removed during mining. The reclamation plan aims to revegetate the site to similar conditions of the existing native rangeland vegetation. Figure J-1 Typical vegetation in river corridor Marcovich Gravel Pit May 2024 J-1 © Lewicki & Associates Figure J-2 Typical rangeland vegetation 2. Wetlands Wetlands identified on the site from the National Wetlands Inventory are shown on Map C-1. A preliminary investigation of wetlands onsite indicates only manmade structures are associated with wetlands. This is limited to a concrete ditch, return irrigation ditch, stock ponds, and a settling pond at the end of the concrete ditch. (see Appendix J-1). A full delineation will be conducted prior to mining in stock ponds area. 3. Estimated Carrying Capacity The final use for the site will be a water storage pond with surrounding rangeland which will serve as open space and public recreation. Since the pond makes up the vast majority of the site area, the rangeland is not anticipated to be used for grazing. Marcovich Gravel Pit May 2024 J-2 © Lewicki & Associates Appendix J-1 Wetlands Report Marcovich Gravel Pit May 2024 J-3 © Lewicki & Associates geos1QM Unmanned Autonomous System Solutions for Natural Resource Assessments, Management, Monitoring 1797 Trek Trail, Reno, Nevada, 89521 * (775) 287-9038 May 9, 2024 Mr. Greg Geras Land Resource Manager Asphalt Specialties 345 W. 62nd Ave. Denver, Colorado 80216 greg(cr�asphaltspecialties.corn SUBJECT: REVIEW OF AQUATIC RESOURCES AT THE APPROXIMATE 42 -ACRE PROJECT AREA (MARCOVICH MINE AREA) Dear Mr. Geras, Summary: Attachment 1, Figure la contains a site location map. Also attached is a map that delineates features that would potentially be under US Army Corps of Engineers (USACE) jurisdiction and what I believe are consistent with the proposed Colorado Gap rule and include the South Platte River and the an adjacent pond/impoundment (Attachment 1, Figure 3)1. The pond area is in my opinion connected to the South Platte River through shallow ground water and is therefore indistinguishable from the South Platte River. The area of the pond is approximately one acre. There was no vegetation at the pond boundary or fridge area on my March 31, 2024 site visit. The pond acts as an impoundment of the South Platte River and is therefore potentially subject to USACE/Environmental Protection Agency (EPA) jurisdiction. The older river floodplain, estimated at the 25 -year return interval, is also visible in aerial photos as the Cottonwood canopy and would be an area that should also be avoided by the proposed mining activities unless appropriate permits are procured prior to impacts. As stated during the field visit, only the USACE can determine jurisdiction under Section 404 of the Clean Water Act and any actions or work are conducted at the applicants own risk. It is unknown what affects, if any, the proposed Colorado gap rules may have in the future. Typically, methodologies consistent with the USACE standards/protocols for determining the presence or absence of waters of the United States (WOTUS)/wetland are determinated through field protocols/indicators and would also be consistent under what we believe are protocols for the Colorado gap rule2. 1There are draft bills identified and are referred to as 24-1379-McCluskie-McCormick and 2024a-127_01- Kirkmeyer. 2 A) 1987 USAGE Wetland Delineation Manual (1987-01, Y-87-1), 143 pages (https://usace.contentdm.ocic.org/digital/collection/p266001c oll 1 /id/4530), B) Regional Supplement to the Corps of Engineers, Wetland Delineation Manual Great Plains Region Version 2.0, 152 pages USACE ERDC/EL TR-10-3, March 2010, 152 pages D:\273326\Asphalt Specialities\Letter Opinion\opinion letter final draft r2.wpd 1 Letter Opinion - Review at the Approximate 42 -acre Project Area (Marcovich Mine Area) Page 2 The site contains existing agricultural fields that are proposed for sand mining activities. The goal of this work is to identify areas to avoid for future mining activities and to determine if there are areas that appear as waters of the United States (WOTUS)/wetlands and would need a formal aquatic resources delineation. In order to better understand the irrigation ditches and water movement through the site, I utilized USGS topographic maps, historical aerials, USGS National Hydrography Database (NHD), irrigation maps and watershed boundary lines to assess if any of the ditches are realigned tributaries3 (Attachment 1, Figures lb, 2a and 2b). A review of the data found the ditches are not realigned tributaries and that there are no other tributaries within the project area (other than the South Platte River). According to you (the Land Manager), the current irrigation ditches were constructed on uplands to convey supplemental irrigation water for use within the project site'. That finding is consistent with my findings and review of aerial photography between 1944 and 2024. The current fields were first apparent in aerial photography in 1949. (https://usace.contentdm.ocic.org/utils/getfile/collection/p266001 coll 1 /id/7613) C) Great Plains Regional Data Sheet (https://www.swg.usace.army.mil/Portals/26/docs/regulatory/Wetlands/greatplains df2.pdf), 2 pages D) USDA, NRCS, 2018 Field Indicators of Hydric Soils in the United States, Version 8.2, LM Vasilas, et.al. (https://www.nres.usda.gov/Internet/FSE DOCUMENTS/nres142p2 053171.pdf) E) Where appropriate, the 2012 Field Book for Describing and Sampling Soils, Version 3.0 NRCS, NSSC, Lincoln, NE (https://www.nres.usda.gov/Internet/FSE DOCUMENTS/nres142p2 052523.pdf) F) State of Colorado Hydric Soils List (https://www.nres.usda.gov/Internet/FSE DOCUMENTS/nreseprd1316619.html) G) USACE - 2018 National Wetland Plant List for Colorado (http://wetland-plants.usace.army.mil/nwpl static/v34/home/home.html) H) ERDC-CRREL TR-22-26.pdf, National Ordinary High Water Mark Field Delineation Manual for Rivers and Streams : Interim Version https://erdc-library.erdc.dren.mil/jspui/handle/11681/46102 US -EPA, 2019, April 10, Exemptions to Permit Requirement under CWA Section 404, 2 -pages, https://www.epa. gov/cwa-404/exemptions-permit-requirements-under-cwa-section-404 USACE, 2020, July 24, Joint Memorandum to the Field Between the US Department of the Army, Corps of Engineers and the US Environmental Protection Agency Concerning Exempt Construction or Maintenance of Irrigation Ditches and Exempt Maintenance of Drainage Ditches Under Section 404 of the Clean Water Act, 7 - pages https://www.epa.gov/sites/production/files/2020-07/documents/final_ ditch_ exemption_memo_j uly_2020_with_epa.p df USACE, 2007, July 4, RGL 07-02, Exemptions for Construction or Maintenance of Irrigation Ditches and Maintenance of Drainage Ditches Under Section 404 of Clean Water Act, 8 -pages, Superseded by USACE, 2020 July 24 Joint Memorandum, https://www.nap.usace.army.mil/Portals/39/docs/regulatory/rgls/rg107-02.pdf 4 In accordance with 33 CFR §323.4 (a) (3), Discharges not requiring permits states: Construction or maintenance offarm or stock ponds or irrigation ditches, or the maintenance (But not construction of) drainage ditches. Discharges associated with siphons, pumps, head gates, wing walls, weirs, diversion structures, and such other facilities as are appurtenant and functionally related to irrigation ditches are included in this exemption. D:\273326\Asphalt Specialities\Letter Opinion\opinion letter final draft r2.wpd 2 Letter Opinion - Review at the Approximate 42 -acre Project Area (Marcovich Mine Area) Page 3 Utilizing the rapid ordinary high water mark (OHWM) field identification sheet, the South Platte River is located on the western edge of the site, and there are two distinct floodplains that should be avoided and were delineated on Attachment 1, Figure 3, Attachment 3. The first appears to the active floodplain which would probably be within the active channel (2- to 5 -year return interval floodplain) and is adjacent to the South Platte River. The second contains the Cottonwood canopy and appears to the be the 25 -year return interval or the cottonwood recruitment floodplain (Attachment 3). In an abundance of caution, mining activity should stay out of these areas (Attachment 1, Figure 3). Without a formal floodplain model in HECRAS this recommendation is based on field indicators related to geomorphic, sediment, vegetation and ancillary indicators. Two soils pits were excavated to a depth of 50 inches within the site at the lowest elevation on the site (#1) and within an abandoned oxbow area within the cottonwood recruitment 25 -year return interval (#2). The groundwater level was at 48" in #1 and there was no groundwater present in #2. Soils were characterized according to the USACE Great Plains Supplement Data sheet (Attachment 2). There were no field indicators of current hydric soils including recent redoximorphic features. While the vegetation in the #2 did meet the criteria for hydrophytic vegetation, it is typical of abandoned oxbows and where supplemental irrigation was channeled. In sort, neither pit met the criteria for wetlands. Finally, given the standard for Clean Water Act Jurisdiction under Sackett v. Environmental Protection Agency, 598 U.S. 651 (2023), the east side of the project area where Asphalt Specialities is undertaking mining development as identified in Attachment 1, Figure 3, does not appear to be under USACE jurisdiction. No traditional interstate navigable water, impoundment, tributary or other WOTUS exist on the east side of the site, nor does it contain tributary channels that flow onto or across it. There are jurisdictional WOTUS areas located on the west side of the project site6. Utilizing the USACE rapid ordinary high water mark (OHWM) field identification data sheet, I walked the channel and floodplain within the study area and walked out to the bench for the active flowing river channel and developed a general understanding of the overall site characteristics. There were no anthropogenic influences on the channel system and the site conditions were consistent with historical photos dated between 1948 to 2024 from both historicaerials.com and googleearth. I was able to develop a general understanding of the geomorphology and vegetation at the site and observed their differences across the hydrogeomorphic floodplain visually from the active South Platte River channel to through the Cottonwood canopy. 6For wetlands to qualify as WOTUS, over which the USACE/EPA would have jurisdiction, wetlands must meet two tests: first, they must "qualify as `waters of the United States' in their own right" by being indistinguishably part of a "relatively permanent, standing or continuously flowing bod[y] of water `forming geographical features that are described in ordinary parlance as `streams, oceans, rivers and lakes;"' and second, they must have "a continuous surface connection with that water" such that "it is difficult to determine where the `water' ends and the `wetland' begins." Sackett, Slip op. at 14, 21-22. See also 40 C.F.R. 120.2(a)(4) (defining jurisdictional wetlands —or "(a)(4) waters" —as wetlands "adjacent" to (1) waters used in interstate or foreign commerce and waters subject to tides —commonly called traditional interstate navigable waters or "(a)(1) waters," or (2) relatively permanent, standing or continuously flowing impoundments or tributaries, referred to a "(a)(2) waters" and "(a)(3) waters," respectively); 40 C.F.R. 120.2(c) (defining "adjacent" as "having a continuous surface connection"). As explained in this memorandum, the areas on the eastern side of the site and do not include any (a)(1), (a)(2), (a)(3), or (a)(4) waters — rather, they are uplands which were artificially irrigated on a seasonal basis through a man-made ditch constructed on an upland and would be exempt. This report does not cover the state of Colorado D:\273326\Asphalt Specialities\Letter Opinion\opinion letter final draft r2.wpd 3 Letter Opinion - Review at the Approximate 42 -acre Project Area (Marcovich Mine Area) Page 4 Introduction: The proposed Marcovich Mine area is composed of approximately 42 acres and has agricultural fields containing supplemental irrigation ditches (Attachment 1, Figures 1a -1c). There was no supplemental water flowing in any of the irrigation ditches, nor any area of surface ponded water on the site during the site visit. Shallow groundwater was at approximately 48 -inches below the ground surface on March 31, 2024. According to local NOAA climate records approximately 1.78 inches of rainfall was received in March (slightly above the average of 1.21 inches) and at the site 0.38 inch was received six -days prior to the March 31, 2024 site visit. The site is indicative of poorly maintained agricultural fields where supplemental irrigation is captured and diverted to various areas to promote grasslands. Geos conducted several field tasks including walking the perimeter of the site, defining the ordinary high water mark (OHWM), and identifying avoidance/no entry areas related to any work activities. See Attachment 1, Figure 3 for defined work areas on the east side of the site where work activities could potentially take place given other local, state and potential other federal permits. Soil & Hydrology: The proposed Marcovich Mine area is complex in that it includes NRCS mapped hydric soils found in areas such as abandoned or historic oxbows (Attachment 1, Figures 2a and 2b, and Attachment 2 (Ellicott Sands, Atvan, Aquolls and Aquents-gravely substratum)). Two soil trenches were excavated by backhoe to a depth of fifty -inches at an old abandoned oxbow where the site is wettest, and in the adjacent field area (adjacent to the Cottonwood canopy) mapped as Atvan loam (but is actually a very coarse sand) (Attachment 1, Figure 2b). One soil trench was excavated in the lowest area in the historic oxbow and groundwater was encountered at a depth of 48 inches below land surface. This depth is too deep to induce wetland conditions. Ponded surface water was not found at the site. It appears this area ws filled prior to 1949. In the adjacent field (typical elevations across the site), a very coarse sand was encountered from eight inches to 48 inches below ground surface, before the trench walls collapsed. The top eight inches of soil appear to be imported fill composed of loamy materials similar the field to the south of the site. It is important to note that there were no recent field indicators for hydric soil such as concentrations, deletions, reduced matrix, oxidized rhizospheres on living roots, water marks, sediment deposits, or drift deposits per the USACE Great Plains wetland determinations data form in either soil trench profile. The site is what I would typically expect to find in poorly maintained irrigated pastures. Vegetation: Vegetation is consistent with irrigated areas with grasses and contains many weedy species such as cheatgrass, some reed canary grass and whitetop (broad -leafed pepperweed) with creeping wild rye, and willow species interspersed throughout the older oxbow area. The fields are also planted with more dryland grass species. While there is some wetland vegetation on the site it seems to be contained in the irrigated ditch areas and is drying (Attachment 2). pending gap water rule mainly because there is no current rule yet. D:\273326\Asphalt Specialities\Letter Opinion\opinion letter final draft r2.wpd 4 Letter Opinion - Review at the Approximate 42 -acre Project Area (Marcovich Mine Area) Page 5 Conclusion: For the purpose of this letter report, the area on the west side of the site should be avoided by any work activities, and the area on the east side of the site appears to be open to land disturbance activities given local, state and other federal permits. As stated during the field visit, due to recent federal regulatory changes under the Sackett decision and pending/potential Colorado state regulations, the presence or absence of an affirmative wetland finding is problematic, and a wetland delineation or aquatic resources determination can only be approved by the USACE. Even after reports could be completed, the area would be considered an atypical problem area due to the supplemental irrigation and could take upwards of a year to obtain a USACE approved jurisdictional determination. Aquatic resources identified herein would probably be consistent with Section 404 under the Sackett decision. However, due to the agricultural exemptions under both versions of the proposed Colorado Gap rules, these findings may also be sufficient for state requirements. Because you are avoiding the obvious areas that would meet WOTUS/wetland definitions (absent irrigation and other exemptions/exclusions) this letter may suffice to direct next tasks at a state level (Attachment 1, Figure 3). It is recommended that the areas shown in Attachment 1, Figure 3 be avoided by proposed mine activities. Please call me with any questions or concerns you may have. Respectfully submitted, /s Lori Carpenter, SPWS Hydrologist/Hydrogeologist cc: Mr. Benjamin H. Miller, PhD., ben@lewicki.biz ATTACHMENTS: Attachment 1 - Figures Attachment 1, Figure 1a Site Location Map Attachment 1, Figure lb Site Location Map - USGS Topography Attachment 1, Figure 2a Fort Lupton Resource Map, NWI & NHD Resources Attachment 1, Figure 2b Fort Lupton Resource Map, Hydric Soils and FEMA Floodplain Attachment 1, Figure 3 Avoidance Area Attachment 2 - Wetland Data Sheets Attachment 3 - Ordinary High Water Mark Data Sheet - KML File with GPS Points to Demarcate Work Versus No Work Areas. D:\273326\Asphalt Specialities\Letter Opinion\opinion letter final draft r2.wpd 5 ATTACHMENT 1 - FIGURES Attachment 1, Figure la Site Location Map Attachment 1, Figure lb Site Location Map - USGS Topography Attachment 1, Figure 2a Fort Lupton Resource Map, NWI & NHD Resources Attachment 1, Figure 2b Fort Lupton Resource Map, Hydric Soils and FEMA Floodplain Attachment 1, Figure 3 Avoidance Area 1/ Longmont, CO Detail Map Lon MO CO Area cf Dac O Fort Lupton, Dac n , CO ,-Colorado Cf hetrLoui Brigh-tri) CO L1 fay e'— Louisville, r-ightor C (-_Denver--Aurora, Denver=aurora, CO i 104°4'40"W a 104°4'30"W - I I Upper Left: 104-49'48" W o 1}0°4'1-"N rJ z - 0 — v 0 L 0 104°4'20"W 104°4'10" r I ----mot I � O0 Project AOI I( Fort Lupton 27 Powars 104°i49'W 104°4'50"W 104°4'4d9V z 0 0 z r r z 0 - 0 104°440"IN I I11 I I I I I I I I Project AOI 27 0 104°4'30"W 104°4'20"W 0 500 1,000 I I I I I I I I I Feet 1 inch = 1000 feet Attachment 1, Figure 1 Site Location Map 104°4 '101"W Lower Right: 10;4°48'34"W 40°3;25"N z 0 M 0 - O r v° M I I I ;Om 0 I I I --c) I I I ar 104°49'W 104°4'50"W 104°4'40"W "; Ft. Lupton Area Asphalt Specialties Path: E:\Asphalt Specialties\Asphalt Specialties.aprx geosJ/ 1797 Trek Trail, Reno, NV 89521 Figure la CarigMdrit,*(..O _ Z Longmont, CO �rn Detail Map Area Dacon—o, O WELD Dac no, CO COUNTY Lafayette -Louisville, CO e ver--A Bright ort Lipton, orado CO n rora, CO Ig atop; c0 ADAMS TY Weld County Project AOI F . it L'+I t,..i Upper! Left: 104°49'35"W 0°4'21"N 104°49'15"W Project AOI 104°49'30"W 0 500 1,000 l l l l l l l I I Feet 1 inch = 2000 feet Attachment 1, Figure 1 Site Location Map 'Lower Right: 104b48'34"W 40°3'39"� 104°49'W 1Pa°ast as" ni Ft. Lupton Area L--= geos J/ Asphalt Specialties Path: E:\Asphalt Specialties\Asphalt Specialties.aprx 1797 Trek Trail, Reno, NV 89521 Figure lb Upper Left: 104°49'48"W 40°4'30"N p 4 t 2 • • 4sb - 1,200 Feet I 1797 Trek Trail, Reno, NV 89521 Spatial Reference GCS WGS 1984 104°49'30"W Project Area 104°49'30"W Fort Lupton Resource Map Figure 2a Asphalt Specialties Prepared 03/25/24 104°49'W , Source: Esri, Maxar, nd the GIS User Community, ontributors, City of Fort eetMap, Microsoft, Esri, raph, GeoTechnologies, Inc, Legend CO Wetlands ▪ NHD Waterbody NHD Flowline Freshwater Emergent Wetland Freshwater Forested/Shrub Wetland Freshwater Pond Riverine Lower Right: 104°48'54"W 40°3'13"N 104°49'W NHD Waterbody NHD Flowline PROJECT_AOI Q Project Area Boundary z M V ° O cr Path: E:\Asphalt Specialties\Asphalt Specialties.aprx Fort Lupton Resource Map Figure 2b Hydric Soils and FEMA Floodplain Asphalt Specialties Prepared 03/25/24 i, USDA FSA, Source: Esri, Maxar, _ographics, and the GIS User Communi nity Maps Contributors, City of Fort © OpenStreetMap, Microsoft, Esri, ;armin, SafeGraph, GeoTechnologies, I Legend 7Z 100 Year Flood Plane Project Area Boundary Altvan loam, 0 to 1 percent slopes Aquolls and Aquents, gravelly substratum Water 104°49'30"W 104°49'W v-- Upper Left: 104°49'56"W - - III - 414 ... rE1 s ....L• Pin ':r;r:* mai .- - :Park Pond ` .wyl ..... VIM i - . f Kahi . ',I lit" k ii- ". 4r6 +. 1. �1 i it if 1, +o) YLone I'' .+►. •' J- Pine ark .-- A . a 41 oar I • {rt ' • t • P .00 � rte* .. L . one � ,;�' -Rine -St a _ # t + •tif a- V. c `# x-'.17 — rt w +��.� # ' 1.r — o • Avoidance Areas - ► i �i� Y� ai LL� #°hqr L.f'4 116 i �1- . - - a 4 �` ° '' • Q ♦ o u Corps Jurisdiction Area Freshwater Pond - No Entry I r W o QJ ,'• •�, "r a ,j,1 � e .. ' NO�WOT S , •• fo'�und / Work w"• Ara r JAiiip +y d s i# •lj ` - .. ` • • or f` - ; ,� r Illik I. Project Area *4 , i SDA FSA, Source: Esri, Maxar aphics, and the GIS User Co unity, ' ii I Maps Contributors, City of �I; OpenStreetMap, Microsoft, E i, di,i i in, SafeGraph, GeoTechnolo s, Inc, — ' I I"- kb, X 0 • . —.411i . \ --„,, 0 600 1,200 Feet I 1 1 1 I 1 1 I g- , � II Lower Right 1 Inch = 600 Feet ; glir Plat _ � " \). t�RiL r 104°48'46"W i 40°3'13"N g e e s UAS 1797 Trek Trail, Reno, NV 89521 Spatial Reference WGS 1984 UTM Zone 13N 104°49'30"W Avoidance Asphalt Prepared Areas Figure 3 Specialties 05/10/24 104°49'W Legend Freshwater Emergent Freshwater Forested/Shrub Freshwater Pond Riverine = Project Area Boundary Avoidance Areas 1® Land Avoidance Area Q Corps Jurisdiction Wetland Wetland Avoidance Areas Path: F:\Asphalt Specialties\Asphalt Specialties.aprx ATTACHMENT 2 - WETLAND DATA SHEETS D:A273326\Asphalt Specialities\Letter Opinion\att box.wpd 2 Prdjebt/Site: Applicant/Owner: Investigator(s): _ Landform (hillslope, terrace etc.: 6 7 LW`'reellief Subregion (LRR): a a' lap Unit Name: Pt"q U O I 1 f climatic i hydrologic conditions on the site typical ftr tllas tilde of year? Yes r No (If no, explain in Remarks) Are Vegetation , Soil , or Hydrology significantly disturbed? j j,1A Are 'Normal Circumstances' present? Yes _ Are Vegetation Soil , or Hydrology naturally problematic? j. -(if needed, explain any answers in Remarks.) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc. WETLAND DETERMINATION DATA FORM — Great Plains Region i C_ City/County ll t/ e, t Section, Township, Range: ve._ ctntve State: Sampling Date: Sampling Point r f NWI classification: No Hydrophytic Vegetation Present? Yes I-typric Soil Present? Yes Wetland Hydrology Present? Yes Is the Sampled Area within a Wetland? Yes No N — Use scientific names of ptants. No No No 1,7 Tree Stratum (Plot size: ) Absolute Dominant Indicator % Cover S 'es?' Status Dominance Test worksheet• of Dominant Species That Are©BL.FACW, orFAC (excluding FAC-): (A) it 2 3: 41 S , t€ ( 1i) 1 j '_ __ tdT Total Number of Dominant Species Across All Strata: (B) Percent of Dominant Species That Are OBL, FACW, or FAC: (R) Shrub Stratum (Plot size: ) = Total Cover 1 5; Herb , '4Prevalent a Index worksheets Total % Cover of: Multiply by: Ck L)t t /© CBL species x 1 = O t FACW species x 2 = -CD 1 FAC species i x3= 3c Stratum (Plot size: ) = Total Cover FACU species x 4 = O UPL species x 5 = 1 2; 4 6f 7; 8r 9� 1C1. -y Column Totals: (A) (B) r W� l l' 'J s , t 11 JPrevalence _E CI Index = BtA = I Hydrophytic Vegetation Indicators: _ 1 - Rapid Test for Hydrophytic Vegetation 2 - Dominance Test is >50% _ 3 - Prevalence index is. 53.0' _ 4 - Morphological Adaptations' (Provide supporting data in Remarks or on a separate sheet) Problematic Hydrophytic Vegetation' (Explain) 'Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic. Woody Vine Stratum (Plot size: ) Total Cover 1 2. Hydrophytic Vegetation Present? Yes $' ` No o Bare Grout d in Herb Stratum Total Cover Remarks: ( � 1 �1 C2-` aOA 6`'',. d (t fareo4 Dl,inc — cinn 9 n US':Army Corps of Engineers Sampling Point: OLJLI_ ',-', f I/ , I Cr i , ,. 4 ^...' N... , f t Profile Description; (Describe to the depth needed to document the indicator or confirm the Depth Matrix Redox Features absence of indicators.) Texture Remarks (inches) Color (moist) % Color °/0 Type' Loc2 (moist) (6 ID E (O Yyo- . e too v ! /1 30 g y _ (DO 1 _ AA t r. '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 (Al) _ Sandy Gleyed Matrix (S4) _ 1 cm Muck (A9) (LRR I, J) Histic Epipedon (A2) _ Sandy Redox (S5) _ Coast Prairie Redox (A16) (LRR F, G, H) Black Histic (A3) _ Stripped Matrix (S6) _ Dark Surface (S7) (LRR G) Hydrogen Sulfide (A4) _ Loamy Mucky Mineral (F1) _ High Plains Depressions (F16) Stratified Layers (A5) (LRR F) _ Loamy Gleyed Matrix (F2) (LRR H outside of MLRA 72 & 73) 1 cm Muck (A9) (LRR F, G, H) Depleted Matrix (F3) ! Reduced Vertic (F18) Depleted Below Dark Surface (All) _ Redox Dark Surface (F6) _ Red Parent Material (TF2) Thick Dark Surface (Al2) _ Depleted Dark Surface (F7) — Very Shallow Dark Surface (TF12) Sandy Mucky Mineral (S1) _ Redox Depressions (F8) _ Other (Explain in Remarks) 2.5 cm Mucky Peat or Peat (S2) (LRR G, H) High Plains Depressions (F16) 3lndicators of hydrophytic vegetation and 5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) wetland hydrology must be present, unless disturbed or problematic. Restrictive Layer (if present): Type: Hydric Soil Present? Yes No ` Depth (inches): Remarks: Wetland Hydrology Indicators: Primary Indicators (minimum of one required; check all that apply) Secondary Indicators (minimum of two required) Surface Water (Al) i _ Salt Crust (911) _ High Water Table (A2) _ Aquatic Invertebrates (B13) _ Saturation (A3) _ Hydrogen Sulfide Odor (C1) _ Water Marks (B1) _ Dry -Season Water Table (C2) Sediment Deposits (B2) _ Oxidized Rhizospheres on Living Roots (C3) _ Drift Deposits (B3) (where not tilled) _ Algal Mat or Crust (B4) _ Presence of Reduced Iron (C4) _ Iron Deposits (B5) _ Thin Muck Surface (C7) _ Inundation Visible on Aerial Imagery (B7) _ Other (Explain in Remarks) Water -Stained Leaves (B9) _ Surface Soil Cracks (B6) _ Sparsely Vegetated Concave Surface (B8) _ Drainage Patterns (B10) _ Oxidized Rhizospheres on Living Roots (C3) (where tilled) _ Crayfish Burrows (C8) _ Saturation Visible on Aerial Imagery (C9) _ Geomorphic Position (D2) _ FAC-Neutral Test (D5) _ Frost -Heave Hummocks (D7) (LRR F) Field Observations: Surface Water Present? Yes No Depth (inches): Wetland Hydrology Vf Present? Yes No Water Table Present? Yes No / Depth (inches): Saturation Present? Yes No V Depth (inches): (includes capillary fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: ) Y 4 z 1/4,./^ US Army Corps of Engineers Great Plains — Version 2.0 Prdject/Site: Vv! Applcant/©wner: lnvestigator(s): l r o e ,1/01L -Cat r�elii�eff�(concave,{convex, non(e): �C 4 `( 4L c.160 31''t`ri 1(1\1 Loo + qq' a rill( tfv Datum : NWI classification: f WETLAND DETERMINATION DATA FORM — Great Plains Region City/County: etc., Larndform (hills) p , terrace, t Subregion (LRR}' fV p Unit Name: Sampling Date: State: CO Sampling Point, Section, Township, Range: Are climatic I hydrologic conditions on the site typical for this time of year? Yes No (If no, explain in Remarks.) / Are Vegetation , Soil , or Hydrology significantly disturbed? Are "Normal Circumstances present? Yes No Are Vegetation , Soil , or Hydrology naturally problematic? (tf needed, explain any answers in Remarks.) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Hydric Soil Present? Wetland Hydrology Present? marks: Yes No Yes No No Yes the Sampled Area ithin a Wetland? Yes No VEGETATION — Use scientific names of plants. Ttee Stratum (Plot size: Absolute Dominant tndicatc % Cover Species? Status Sapling/Shrub Stratum (Plot siz4 N 2, 4 = Total Cover Do i €once Test worksheet: Number of Dominant Species That Are OBL, FACW, or FAC (excluding FAC-): (A) Total Number of D ant Species Across trafa: (B) P minant Species Etta ©BL, FACW, or FAC: (Plot size: - Total Cover 41 5 61 7l Vine Stratum (Plot size: 2. % Bare Ground in Herb Stratum Remarks: = Total Cover = Total Cover Pre Index worksheet: Total % Cover of: Multiply bv: OBL species x 1 = FACW species x 2 = FAC species x 3 = FACU species x 4 = UPL species x 5 =- Column Totals: (A) (B) Prevalence Index = B/A = rphytrc Vegetation Indicators: - Rat�id Test for Hydrophytic Vegetation _ 2 -Dr 3- Pre _ 4 - Morphologi data in Rema e Test is >50% ex is saki' Adaptations' (Provide supportin on a separate sheet) Problematic Hydrophytic Vegetation' (Explain) Hydrophytic Vegetation Present? ii and wetland hydrology must US, Army Corps of Engineers Great Plains — Version 2.0 Sampling Point: JVIV Profile Description: (Describe to the depth needed to document the indicator or confirm the Depth Matrix Redox Features absence of indicators.) Texture Remarks inches Color (moist) % Color (moist) 6/0 Type' Loc2 \ C O #� t, ,. \lK. 1 '. P '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) _ Coast Prairie Redox (A16) (LRR F, G, H) Black Histic (A3) _ Stripped Matrix (S6) _ Dark Surface (S7) (LRR G) Hydrogen Sulfide (A4) _ Loamy Mucky Mineral (F1) High Plains Depressions (F16) Stratified Layers (A5) (LRR F) _ Loamy Gleyed Matrix (F2) (LRR H outside of MLRA 72 & 73) 1 cm Muck (A9) (LRR F, G, H) _ Depleted Matrix (F3) Reduced Vertic (F18) Depleted Below Dark Surface (A11) _ Redox Dark Surface (F6) _ Red Parent Material (TF2) Thick Dark Surface (Al2) _ Depleted Dark Surface (F7) _ Very Shallow Dark Surface (TF12) Sandy Mucky Mineral (S1) _ Redox Depressions (F8) _ Other (Explain in Remarks) 2.5 cm Mucky Peat or Peat (S2) (LRR G, H) _ High Plains Depressions (F16) 3lndicators of hydrophytic vegetation and 5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) wetland hydrology must be present, unless disturbed or problematic. Restrictive Layer (if present): Type: Hydric Soil Present? Yes No / Depth (inches): Remarks: Wetland Hydrology Indicators: Primary Indicators (minimum of one required; check all that apply) Secondary Indicators (minimum of two required) _ Surface Soil Cracks (B6) _ Sparsely Vegetated Concave Surface (B8) _ Drainage Patterns (B10) _ Oxidized Rhizospheres on Living Roots (C3) (where tilled) _ Crayfish Burrows (C8) _ Saturation Visible on Aerial Imagery (C9) _ Geomorphic Position (D2) _ FAC-Neutral Test (D5) _ Frost -Heave Hummocks (D7) (LRR F) _ Surface Water (Al) _ Salt Crust (B11) _ High Water Table (A2) _ Aquatic Invertebrates (B13) Saturation (A3) _ Hydrogen Sulfide Odor (C1) _ Water Marks (B1) _ Dry -Season Water Table (C2) _ Sediment Deposits (B2) _ Oxidized Rhizospheres on Living Roots (C3) _ Drift Deposits (B3) (where not tilled) _ Algal Mat or Crust (B4) _ Presence of Reduced Iron (C4) _ Iron Deposits (B5) _ Thin Muck Surface (C7) _ Inundation Visible on Aerial Imagery (B7) _ Other (Explain in Remarks) Water -Stained Leaves (B9) Field Observations: Surface Water Present? Yes No Depth (inches): Wetland Hydrology Present? Yes No Water Table Present? Yes No Depth (inches): Yes No Depth (inches): Saturation Present? (includes capillary fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks:V b, , US Army Corps of Engineers Great Plains — Version 2.0 Soil Pit #1 and #2 Soil Pit #1 Soil Pit #2 ATTACHMENT 3 - ORDINARY HIGH WATER MARK DATA SHEET See KMZ-KML File on email or disk D:A273326\Asphalt Specialities\Letter Opinion\att box.wpd 3 Print Form E-mail U.S. Army Corps of Engineers (USAGE) RAPID ORDINARY HIGH WATER MARK (OHWM) FIELD IDENTIFICATION DATA SHEET The proponent agency is Headquarters USACE CECW-CO-R. Project ID #: ation (lat?long): Site Name: CC D '. nvestigator(s). I OMB Control No. 0710-XXXX 1 Approval Expires: `` Date and Time: 3 Step 1 Site overview from remote and online resources Check boxes for online resources used to evaluate site: 1I ! gage data � LiDAR ` geologic maps/ ( Fclimatic data Fi7i satellite imagery [land use maps serial photos Piopographic maps ROther li r ; Describe land use and flow conditions from online resources. Were there any recent extreme events (floods r drought)? 1`lc�rr> ,cz t MtY� " c C a, i is WO(it to") )1 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. 1 i Ye r Ly.c ,�� g b 3r 0 V 'rte. 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 Break in slope: nthe bank: undercut bank: valley bottom: Other: Shelving: shelf at top of bank: natural levee: man-made berms or levees: other berms: Channel bar: shelving (berms) on bar: unvegetated: I vegetation transition (go to veg. indicators) sediment transition (go to sed. indicators) upper limit of deposition on bar: Instream bedforms and other bedload transport evidence: deposition bedload indicators (e.g., imbricated clasts, gravel sheets, etc) bedforms (e.g., poofs, riffles, steps, etc.): erosional bedload indicators (e.g., obstacle marks, scourr, smoothing, etc.) Secondary channels: l i Soil development: DChanges in character of soil: Li IVludcraclrs: ( Changes in particle -sized I distribution: i transition from to Li LI LI 17 Weathered ciasts or bedrock: Wracking/presence of organic litter: Presence of large wood: Leaf litter disturbed or washed away: Water staining: upper limit of sand -sized particles Other observed indicators? I I silt deposits: Vegetation Indicators El L Change in vegetation type and/or density: Check the appropriate boxes and select the general vegetation change (e.g., graminoids to woody shrubs). Describe the vegetation transition looking from the middle of the channel, up the banks, and into the floodplain. vegetation absent to: moss to: forbs to: graminoids to: woody shrubs to: deciduous trees to: coniferous trees to: rIj Vegetation matted down I and/or bent: FiExposed roots below i intact soil la er: Describe: 1ecre c CU J . ncll ep 4 is additional information needed to support this determination? Yes No If yes, describe and attach information to datasheet: ENG FORM 6250, AUG 2021 PREVIOUS EDITIONS ARE OBSOLETE. Page 1 of 4 Save As E- i roject ID #: t Y i 2 I i of ,: t I Po i e.c ' LIG .3 tr/ `V Step 5 rati to for iocation of QH W M Additional observations or gates Y• ,,e3ci AD g A tact! a hot€ of th Photo log attached? [es e%! € 4 g th separately. [] lea II no, explain why not: -C--- P hs and include descriptions in . ' ti r!lher photographs in the order that they are taken. Attach photographs and include annotations of features. Photo Number tiev pitail jg 3Y yy 'f a r rt Y- ''6 't. Y l 5f w.r i.J„'F c $ Q' ��"t Co t 2 Page 2 of EXHIBIT K CLIMATE INFORMATION The Marcovich Mining Resource is located southeast of Fort Lupton, Colorado at an elevation of approximately 4890 feet. The area is classified as a cold semi -arid climate (BSk) under the Koppen Climate Classification system. This climate type is typically characterized as dry and moderate with cool, wetter winters and warm, dryer summers. Table K-1 shows a summary of the climate for this area based on records from 1980-2016. Table K-1 Climate Data of Fort Lupton, Colorado' Average Temperature (F) Average Precipitation (in) Maximum Minimum Total precip. Total snow January 43 20 0.5 2.1 February 47 23 0.4 2.3 March 56 29 0.9 2.7 April 63 36 1.3 1.6 May 82 45 2.4 0.2 June 83 54 1.7 0.0 July 88 59 1.3 0.0 August 86 57 1.2 0.0 September 78 48 1.2 0.2 October 65 37 0.8 1.3 November 52 27 0.5 2.5 December 42 20 0.3 2.6 Yearly (avg) 65.4 37.9 12.4 15.5 4 https://weatherspark.com/y/3746/Average-Weather-in-Fort-Lupton-Colorado-United-States-Year-Round Marcovich Gravel Pit May 2024 K-1 © Lewicki & Associates EXHIBIT L RECLAMATION COSTS The worst -case reclamation scenario will occur at the beginning of mining due to the cost of the slurry wall. Inlet and outlet structures are included in this estimate, but do not need to be constructed immediately. Before mining progresses within the 300 -foot offset, the structures will be installed. In addition to the slurry wall cost, the highwall will be dozed to a 1.5H:1V slope and then backfilled with material to a 3H:1V slope. Sufficient material stockpiles will remain onsite until the final backfilling is complete. For worst case bonding, it has been assumed that 1000 feet of highwall will require backfill and other reclamation work. After final grading is complete, stockpiled topsoil will be placed at a thickness of one foot. The topsoiled areas will then be seeded based on the permitted seed plan. A breakdown of the estimated worst -case reclamation cost is shown in Table L-1. Once the slurry wall is installed, the permittee may pursue a reduced bond via a bond reduction request to CDRMS. The slurry wall unit cost is based on previous CDRMS slurry wall cost calculations for other similar sites. Marcovich Gravel Pit May 2024 L-1 © Lewicki & Associates Table L-1 Marcovich Mining Resource Bond Estimate. Description Construct slurry wall. 4750 -ft by 50 -ft deep. Material Quantity 237,500 Unit Sq. ft. Unit Cost $4.30 Cost $1,021,250 Inflow / outflow structures including excavation, riprap, concrete, and vegetation. 1 each $35,000 $35,000 Topsoiling to 1 FT. deep along the slurry wall installation path. 20 -ft wide x 4750 -ft long (2.2 acres) x 1 -ft deep. 3,520 CY $1.05 $3,700 1000 -ft of highwall backfilled from 1.5H:1V to 3H:1V to a depth of 25 -ft. 17,360 CY $1.05 $18,230 Topsoil areas above water level and above highwall 1 ft. deep (4 acres) 9,680 CY $1.05 $10,160 Scarify topsoiled areas prior to seeding (slurry wall installation path + highwall and surroundings) 6.2 acres $150 $930 Seeding of topsoiled areas. 6.2 acres $400 $2,480 Mulching of topsoiled areas. 6.2 acres $500 $3,100 Weed control management for two years. 2 each $1500 $3,000 Subtotal $1,108,010 DRMS cost (28%) $310,243 Total $1,418,253 Marcovich Gravel Pit May 2024 L-2 © Lewicki & Associates EXHIBIT M OTHER PERMITS REQUIRED The following permits are necessary to operate at the Marcovich Mining Resource. Copies of all permits will be provided to the Division after they have been acquired. 1. Weld County Use Permit 2. Colorado Air Pollution Control Division Fugitive Dust Permit and Air Pollution Emission Notice (APEN) 3. Water Quality Control Commission Discharge Permit 4. Colorado Dept. of Transportation access permit 5. Weld County Floodplain Development permit 6. Colorado Division of Water Resources gravel well permit Marcovich Gravel Pit May 2024 M-1 © Lewicki & Associates EXHIBIT N RIGHT OF ENTRY The surface and mineral owners of the property to be mined are Jerry and Adam Marcovich. A right of entry affidavit is attached. Marcovich Gravel Pit May 2024 N-1 © Lewicki & Associates EXHIBIT 0 OWNERS OF AFFECTED LAND AND MINERAL TO BE MINED The owner(s) of record of affected land (surface area) and owners of substance to be mined are Jerry and Adam Marcovich. Marcovich Gravel Pit May 2024 O-1 © Lewicki & Associates EXHIBIT P MUNICIPALITIES WITHIN TWO MILES The Marcovich Mining Resource is located immediately southeast of Fort Lupton, Colorado, a city in Weld County. Fort Lupton 130 S McKinley Avenue Fort Lupton, CO Marcovich Gravel Pit May 2024 P-1 © Lewicki & Associates EXHIBIT Q PROOF OF MAILING OF NOTICES TO THE BOARD OF COUNTY COMMISSIONERS AND SOIL CONSERVATION DISTRICT Notices were filed with the Weld County Board of Commissioners and the West Greeley Conservation District in support of this permit application. Weld County Board of Commissioners 1150 O Street P.O. Box 758 Greeley, CO 80631 Platte Valley Conservation District 57 W Bromley Lane Brighton, CO 80601 Marcovich Gravel Pit May 2024 Q-1 © Lewicki & Associates EXHIBIT R PROOF OF FILING WITH COUNTY CLERK A return receipt from the Weld County Clerk & Recorder is attached. Weld County Clerk and Recorder 1250 H Street Greeley, CO 80631 Marcovich Gravel Pit May 2024 R-1 © Lewicki & Associates EXHIBIT S PERMANENT MAN-MADE STRUCTURES The following is a list of man-made structures within 200 feet of the affected area. All of these structures are shown on Map C-1. Landowner boundaries can also be found on Map C-1. Proof of delivery of structure agreements is attached to this exhibit. In the event that a structure agreement is unobtainable, defer to the Geotechnical Stability Exhibit which indicates that all structures will be protected. Table S-1. Permanent Structures within 200' of the Affected Area Owner Sakata Land Co. Owner Address PO BOX 508 Brighton, CO 80601 Structures Access Road fences culverts, return irrigation ditch General Location Parcel directly south of the permit area and across Highway 85 from the permit area. Lawrence Scott 1165 S Denver Ave Fort Lupton, CO 80621 Fence, culvert, and return irrigation ditch Located east of the affected area across Highway 85 City of Aurora 15151 E ALAMEDA PKWY # 3200 AURORA, CO 800121555 Fence, culvert, and return irrigation ditch North of permit area. Xcel Energy 7493 Highway 85 Fort Lupton, CO 80621 Powerlines servicing permit area and property to the north. East of permit area. Colorado Department of Transportation 10601 W. 10th St. Greeley, CO 80634 US Highway 85 and related structures. East of permit area. Marcovich Gravel Pit May 2024 S-1 © Lewicki & Associates RULE 1.6.2(1)(B) Prior to the submittal of the application, a sign was erected at the entrance to the site that contains the required information dictated by Rule 1.6.2(1)(b). Please see attached sign certification. Marcovich Gravel Pit May 2024 © Lewicki 8i Associates RULE 6.5: GEOTECHNICAL STABILITY EXHIBIT There are no known geologic hazards on the proposed site. Based on a slope stability analysis, buildings or other structures within 200' of the Marcovich affected area will not be affected by mining excavation. Sufficient buffers will be maintained to structures. Maps C-3 and F-1 shows these buffers. Slurry walls installed prior to mining will be 30 -ft away from the edge of mining. Map C-3 shows the mining and reclamation slopes of the mine. A standard slope was analyzed for stability as it is a good example of the nearest structure, the slurry wall. The material properties are derived from Table 2.5 in the SME Mining Reference Handbook', as there is no site -specific strength data of the material available. Therefore, all materials are matched to a classification from this table that best matches the materials in terms of description. The native alluvial material is best classified as sand and gravel with a mixed grain size. A layer of overburden and sand lies atop the sand and gravel deposit. This material is best described as loose sand, mixed grain size. The bedrock is a soft sedimentary rock (claystone/siltstone) according to the SME Table 2.5. A summary of the material properties can be seen in Table 6.5-1. Table 6.5-1 Material Properties Material Sand and gravel, mixed grain size Unit Weight (lbs/ft) Cohesion Friction Angle 110 0 45 Loose sand, mixed grain size 99 0 34 Bedrock 110 20,000 25.0 The final mining (1.5H:1V) and final reclamation (3H:1V) slopes were analyzed. Mining will be conducted at a near active highwall angle until the highwall has reached the half -way point of the final mining slope. Then the vertical active highwall slope will be knocked down to the final mining slope of 1.5H:1V. Then it will be backfilled with overburden/sand to the final reclamation slope of 3H:1V. The final mining and reclaimed slope crests will be the closest excavation comes to the slurry wall and any structures. 1. Mining and Reclamation Slopes Factor of Safety is expressed in terms of strength divided by stress as a ratio. It is arrived at by an iterative computer process where a slope failure is assumed, the strength and stress of that 1 Original source: Hoek and Bray 1977 GS -1 © Lewicki & Associates slope failure are calculated, and those values are compared to determine a lowest factor of safety. In the case of the Marcovich slope stability analysis, the Bishop's Method of Slices was the iterative calculation used, and the software GALENA was used to model slopes and calculate the factor of safety. One slope closest to major structures (see Figure GS -1) was analyzed to look at the factor of safety. Table GS -1 lists the analysis conducted and their respective factors of safety. GALENA data tables and analysis result figures are attached as Appendix GS -1. Figure GS -1. Locations of Slope Stability Analysis from Map F-1 GS -2 © Lewicki & Associates Figure GS -2. GALENA Cross Sections (Mining and Reclamation) GS -3 © Lewicki & Associates Table GS -1. Factors of Safety for Slope Stability Slope Condition Full Mining Final Reclamation Lowest Factor of Safety (static) 1.58 3.03 Lowest Factor of Safety Nearest Structure (seismic) 1.40 2.57 Slurry wall Slurry wall 2. Conclusion The Final Reclamation slope has a minimum factor of safety (FoS = 3.03) of greater than 1.5 for static conditions. The Final Mining slope also has a minimum FoS greater than 1.5 (1.58) for static conditions. These Factors of Safety are greater than the CDRMS minimum for critical structure of 1.5. The seismic conditions analysis for both scenarios are similarly above the CDRMS minimums for critical structures: 1.40 > 1.3 and 1.57 > 1.3 The slope stability analysis in this permit has been prepared according to appropriate engineering standards and practices. Ben Langenfeld, P.E. P.E.# 0047151 GS -4 © Lewicki & Associates APPENDIX GS -1 GALENA INFORMATION GS -5 © Lewicki & Associates 5000 4980 4960 4940 4920 4900 4880 4860 4840 4820 4800 4780 4760 0 GALENA Version 7.1 50 100 150 200 250 300 Licensed to: Greg Lewicki and Associates Material Keys 1: Sand and gravel, mixed grain size 2: OB - loose sand, mixed grain size 3: Bedrock - claystone 4: Slurry Wall Analysis 1 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular Results Critical Factor of Safety: Project Marcovich Mining Condition File: E:IWorkIGLA Dropbox\Ben LangenfeldlAsphalt Specialties\Marcovich\Slope StabilitylMarcovich Slope Stability.gmf 1.58 Edited: 3 May 2024 Processed: 3 May 2024 © Lewicki S; Associates 5000 4980 4960 4940 4920 4900 4880 4860 4840 4820 4800 4780 4760 0.050 0 GALENA Version 7.1 50 100 150 200 250 300 Licensed to: Greg Lewicki and Associates Material Keys 1: Sand and gravel, mixed grain size 2: OB - loose sand, mixed grain size 3: Bedrock - claystone 4: Slurry Wall Analysis 2 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular (Critical Seed) Results Critical Factor of Safety: Project Marcovich Mining Condition File: E:II/VorkIGLA Dropbox\Ben LangenfeldlAsphalt Specialties\Marcovich\Slope StabilitylMarcovich Slope Stability.gmf 1.40 Edited: 3 May 2024 Processed: 3 May 2024 © Lewicki S; Associates 5000 4980 4960 4940 4920 4900 4880 4860 4840 4820 4800 4780 4760 0 GALENA Version 7.1 50 100 150 200 250 300 Licensed to: Greg Lewicki and Associates Material Keys 1: Sand and gravel, mixed grain size 2: OB - loose sand, mixed grain size 3: Bedrock - claystone 4: Slurry Wall Analysis 3 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular Results Critical Factor of Safety: 3.03 Project Marcovich Reclaimed Condition File: E:IWorkIGLA Dropbox\Ben LangenfeldlAsphalt Specialties\Marcovich\Slope StabilitylMarcovich Slope Stability.gmf Edited: 3 May 2024 Processed: 3 May 2024 © Lewicki S; Associates 5000 4980 4960 4940 4920 4900 4880 4860 4840 4820 4800 4780 4760 0.050 0 GALENA Version 7.1 50 100 150 200 250 300 Licensed to: Greg Lewicki and Associates Material Keys 1: Sand and gravel, mixed grain size 2: OB - loose sand, mixed grain size 3: Bedrock - claystone 4: Slurry Wall Analysis 4 Multiple Stability Analysis Method: Bishop Simplified Surface: Circular (Critical Seed) Results Critical Factor of Safety: 2.57 Project Marcovich Reclaimed Condition File: E:II/VorkIGLA Dropbox\Ben LangenfeldlAsphalt Specialties\Marcovich\Slope StabilitylMarcovich Slope Stability.gmf Edited: 3 May 2024 Processed: 3 May 2024 © Lewicki S; Associates GALENA 7.1 Analysis Results Version: 7.10.1.04 Licensee: Greg Lewicki and Associates Project: Marcovich File: E:\Work\GLA Dropbox\Ben Langenfeld\Asphalt Specialties\Marcovich\Slope Stability\Marcovich Slope Stability.gmf Processed: 03 May 2024 08:21:43 DATA: Analysis 1 - Mining Condition Material Properties (4 materials) Material: 1 (Mohr -Coulomb Isotropic) - Sand and gravel, mixed grain size Cohesion Phi UnitWeight Ru 0.00 45.0 110.00 Auto Material: 2 (Mohr -Coulomb Isotropic) - OB - loose sand, mixed grain size Cohesion Phi UnitWeight Ru 0.00 34.0 99.00 Auto Material: 3 (Mohr -Coulomb Isotropic) - Bedrock - claystone Cohesion Phi UnitWeight Ru 20000.00 25.0 110.00 Auto Material: 4 (Mohr -Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 0.0 112.00 Auto Saturated: 0.00 0.0 115.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 0.000 Material Profiles (4 profiles) Profile: 1 (2 points) Material beneath: 2 - OB - loose sand, mixed grain size 0.00 4900.00 300.00 4900.00 Profile: 2 (2 points) Material beneath: 1 - Sand and gravel, mixed grain size 0.00 4897.00 300.00 4897.00 Profile: 3 (2 points) Material beneath: 3 - Bedrock - claystone 0.00 4850.00 300.00 4850.00 Profile: 4 (5 points) Material within: 4 - Slurry Wall 65.00 4895.00 70.00 4895.00 70.00 4845.00 65.00 4845.00 65.00 4895.00 Slope Surface (4 points) 1.00 4897.00 100.00 4897.00 139.00 4872.00 300.00 4872.00 Phreatic Surface (2 points) 0.00 4895.00 66.00 4895.00 Piezometric Surfaces (1 surface) Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 100.90 YL: 4896.42 XR: 138.80 YR: 4872.13 Centre: XC: 143.94 YC: 4921.86 Radius: R: 50.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 25.00 20.00 10.50 Trial positions within range: 10 10 10 RESULTS: Analysis 1 - Mining Condition Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Factor of Safety for initial failure surface approximation: 1.759 There were: 705 successful analyses from a total of 1001 trial surfaces 296 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.58 Results Summary - Lowest 99 Factor of Safety circles Circle X -Left Y -Left X -Right Y -Right X -Centre Y -Centre Radius FoS 1 113.40 4888.41 128.80 4878.54 150.50 4929.35 55.25 1.584 <-- Critical Surface 2 113.40 4888.41 128.80 4878.54 149.87 4928.35 54.08 1.585 3 113.40 4888.41 128.80 4878.54 149.23 4927.35 52.92 1.586 4 113.40 4888.41 128.80 4878.54 148.59 4926.36 51.75 1.588 5 113.40 4888.41 128.80 4878.54 147.95 4925.36 50.58 1.589 6 113.40 4888.41 128.80 4878.54 147.31 4924.36 49.42 1.590 7 113.40 4888.41 131.02 4877.11 151.49 4928.43 55.25 1.592 8 113.40 4888.41 128.80 4878.54 146.67 4923.36 48.25 1.592 9 113.40 4888.41 131.02 4877.11 150.85 4927.43 54.08 1.593 10 113.40 4888.41 128.80 4878.54 146.02 4922.36 47.08 1.593 11 110.62 4890.19 128.80 4878.54 148.95 4929.98 55.25 1.594 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 113.40 113.40 110.62 113.40 110.62 113.40 113.40 110.62 113.40 113.40 110.62 113.40 113.40 110.62 110.62 113.40 113.40 110.62 110.62 107.84 113.40 113.40 110.62 110.62 107.84 113.40 113.40 110.62 110.62 107.84 113.40 113.40 110.62 4888.41 4888.41 4890.19 4888.41 4890.19 4888.41 4888.41 4890.19 4888.41 4888.41 4890.19 4888.41 4888.41 4890.19 4890.19 4888.41 4888.41 4890.19 4890.19 4891.97 4888.41 4888.41 4890.19 4890.19 4891.97 4888.41 4888.41 4890.19 4890.19 4891.97 4888.41 4888.41 4890.19 131.02 128.80 128.80 131.02 128.80 128.80 131.02 128.80 131.02 133.24 128.80 131.02 133.24 128.80 131.02 131.02 133.24 128.80 131.02 128.80 133.24 131.02 131.02 128.80 128.80 133.24 131.02 131.02 128.80 128.80 135.47 133.24 131.02 4877.11 4878.54 4878.54 4877.11 4878.54 4878.54 4877.11 4878.54 4877.11 4875.69 4878.54 4877.11 4875.69 4878.54 4877.11 4877.11 4875.69 4878.54 4877.11 4878.54 4875.69 4877.11 4877.11 4878.54 4878.54 4875.69 4877.11 4877.11 4878.54 4878.54 4874.27 4875.69 4877.11 150.20 145.38 148.31 149.56 147.67 144.74 148.92 147.02 148.27 152.45 146.38 147.63 151.81 145.74 149.91 146.98 151.16 145.09 149.27 147.37 150.52 146.34 148.62 144.44 146.73 149.87 145.69 147.97 143.80 146.08 153.40 149.22 147.33 4926.43 4921.36 4928.98 4925.43 4927.98 4920.35 4924.43 4926.97 4923.42 4927.49 4925.97 4922.42 4926.49 4924.96 4929.03 4921.41 4925.48 4923.96 4928.03 4930.57 4924.47 4920.40 4927.02 4922.95 4929.56 4923.46 4919.39 4926.01 4921.94 4928.55 4926.52 4922.45 4925.00 52.92 1.595 45.92 1.595 54.08 1.595 51.75 1.596 52.92 1.597 44.75 1.597 50.58 1.598 51.75 1.599 49.42 1.600 55.25 1.601 50.58 1.601 48.25 1.602 54.08 1.602 49.42 1.603 55.25 1.603 47.08 1.604 52.92 1.604 48.25 1.605 54.08 1.605 55.25 1.605 51.75 1.607 45.92 1.607 52.92 1.607 47.08 1.607 54.08 1.607 50.58 1.609 44.75 1.609 51.75 1.609 45.92 1.610 52.92 1.610 55.25 1.611 49.42 1.611 50.58 1.612 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 107.84 110.62 113.40 110.62 113.40 110.62 107.84 113.40 110.62 107.84 113.40 110.62 107.84 113.40 110.62 107.84 105.07 113.40 110.62 107.84 113.40 110.62 107.84 105.07 113.40 113.40 110.62 107.84 113.40 110.62 107.84 105.07 113.40 4891.97 4890.19 4888.41 4890.19 4888.41 4890.19 4891.97 4888.41 4890.19 4891.97 4888.41 4890.19 4891.97 4888.41 4890.19 4891.97 4893.75 4888.41 4890.19 4891.97 4888.41 4890.19 4891.97 4893.75 4888.41 4888.41 4890.19 4891.97 4888.41 4890.19 4891.97 4893.75 4888.41 128.80 128.80 135.47 133.24 133.24 131.02 128.80 135.47 133.24 131.02 133.24 131.02 128.80 135.47 133.24 131.02 128.80 133.24 131.02 128.80 135.47 133.24 131.02 128.80 137.69 133.24 131.02 128.80 135.47 133.24 131.02 128.80 137.69 4878.54 4878.54 4874.27 4875.69 4875.69 4877.11 4878.54 4874.27 4875.69 4877.11 4875.69 4877.11 4878.54 4874.27 4875.69 4877.11 4878.54 4875.69 4877.11 4878.54 4874.27 4875.69 4877.11 4878.54 4872.84 4875.69 4877.11 4878.54 4874.27 4875.69 4877.11 4878.54 4872.84 145.43 143.15 152.75 150.85 148.57 146.68 144.78 152.10 150.21 148.31 147.92 146.03 144.13 151.45 149.55 147.66 145.76 147.27 145.38 143.48 150.80 148.90 147.01 145.11 154.33 146.62 144.72 142.83 150.15 148.25 146.36 144.46 153.67 4927.54 4920.93 4925.51 4928.06 4921.44 4923.99 4926.53 4924.50 4927.04 4929.59 4920.43 4922.97 4925.52 4923.48 4926.03 4928.57 4931.12 4919.41 4921.96 4924.50 4922.47 4925.01 4927.56 4930.10 4925.53 4918.39 4920.94 4923.48 4921.45 4924.00 4926.54 4929.09 4924.51 51.75 44.75 54.08 55.25 48.25 49.42 50.58 52.92 54.08 55.25 47.08 48.25 49.42 51.75 52.92 54.08 55.25 45.92 47.08 48.25 50.58 51.75 52.92 54.08 55.25 44.75 45.92 47.08 49.42 50.58 51.75 52.92 54.08 1.612 1.612 1.613 1.613 1.614 1.614 1.615 1.615 1.616 1.616 1.617 1.617 1.617 1.618 1.618 1.619 1.619 1.620 1.620 1.620 1.621 1.621 1.621 1.622 1.622 1.623 1.623 1.623 1.624 1.624 1.624 1.624 1.625 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 110.62 110.62 107.84 113.40 110.62 107.84 105.07 113.40 110.62 107.84 107.84 113.40 110.62 107.84 105.07 113.40 110.62 107.84 105.07 102.29 105.07 107.84 4890.19 4890.19 4891.97 4888.41 4890.19 4891.97 4893.75 4888.41 4890.19 4891.97 4891.97 4888.41 4890.19 4891.97 4893.75 4888.41 4890.19 4891.97 4893.75 4895.53 4893.75 4891.97 135.47 131.02 128.80 135.47 133.24 131.02 128.80 137.69 135.47 133.24 128.80 135.47 133.24 131.02 128.80 137.69 135.47 133.24 131.02 128.80 131.02 133.24 Critical Failure Surface (circle 1) 4874.27 4877.11 4878.54 4874.27 4875.69 4877.11 4878.54 4872.84 4874.27 4875.69 4878.54 4874.27 4875.69 4877.11 4878.54 4872.84 4874.27 4875.69 4877.11 4878.54 4877.11 4875.69 Intersects: XL: 113.40 YL: 4888.41 Centre: XC: 150.50 YC: 4929.35 Generated failure surface: (20 points) 113.40 4885.91 117.12 4883.10 121.10 4880.63 4888.41 114.12 4887.77 4885.32 117.90 4884.75 4882.57 121.92 4882.07 151.78 144.07 142.17 149.49 147.60 145.70 143.80 153.02 151.12 149.23 141.52 148.84 146.94 145.05 143.15 152.37 150.47 148.57 146.68 144.12 146.02 147.92 4927.05 4919.92 4922.46 4920.43 4922.98 4925.52 4928.07 4923.49 4926.03 4928.58 4921.44 4919.41 4921.95 4924.50 4927.04 4922.47 4925.01 4927.56 4930.10 4931.62 4929.08 4926.53 55.25 44.75 45.92 48.25 49.42 50.58 51.75 52.92 54.08 55.25 44.75 47.08 48.25 49.42 50.58 51.75 52.92 54.08 55.25 55.25 54.08 52.92 XR: 128.80 YR: 4878.54 Radius: R: 55.25 114.86 4887.14 118.68 4884.18 122.75 4881.57 1.625 1.627 1.627 1.627 1.627 1.627 1.628 1.628 1.628 1.628 1.631 1.631 1.631 1.631 1.631 1.631 1.631 1.631 1.631 1.634 1.634 1.634 115.60 4886.52 119.48 4883.63 123.59 4881.09 116.36 120.28 124.44 125.30 4880.18 4878.54 126.16 4879.75 127.03 4879.33 127.91 4878.93 128.80 Slice Geometry and Properties - Critical Failure Surface (circle 1, 38 slices) Slice X -S Base PoreWater Normal Test X -Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 113.40 0.02 41.7 0.36 0.48 1 0.00 45.0 1.78 0.00 3.16 0.86 2 113.76 0.05 41.7 0.36 0.48 1 0.00 45.0 5.37 0.00 9.52 0.86 3 114.12 0.08 40.7 0.37 0.48 1 0.00 45.0 8.88 0.00 15.70 0.85 4 114.49 0.11 40.7 0.37 0.48 1 0.00 45.0 12.13 0.00 21.44 0.85 5 114.86 0.14 39.7 0.37 0.48 1 0.00 45.0 15.39 0.00 27.15 0.85 6 115.23 0.17 39.7 0.37 0.48 1 0.00 45.0 18.25 0.00 32.19 0.85 7 115.60 0.19 38.7 0.38 0.48 1 0.00 45.0 21.21 0.00 37.32 0.85 8 115.98 0.22 38.7 0.38 0.48 1 0.00 45.0 23.72 0.00 41.74 0.85 9 116.36 0.24 37.7 0.38 0.48 1 0.00 45.0 26.38 0.00 46.33 0.85 10 116.74 0.26 37.7 0.38 0.48 1 0.00 45.0 28.49 0.00 50.03 0.85 11 117.12 0.28 36.7 0.39 0.48 1 0.00 45.0 30.81 0.00 54.02 0.85 12 117.51 0.30 36.6 0.39 0.48 1 0.00 45.0 32.52 0.00 57.05 0.85 13 117.90 0.31 35.6 0.39 0.48 1 0.00 45.0 34.46 0.00 60.38 0.85 14 118.29 0.33 35.7 0.39 0.48 1 0.00 45.0 35.77 0.00 62.64 0.85 15 118.68 0.34 34.7 0.40 0.48 1 0.00 45.0 37.32 0.00 65.29 0.85 16 119.08 0.35 34.7 0.40 0.48 1 0.00 45.0 38.18 0.00 66.82 0.85 17 119.48 0.36 33.7 0.40 0.48 1 0.00 45.0 39.33 0.00 68.78 0.85 18 119.88 0.36 33.7 0.40 0.48 1 0.00 45.0 39.76 0.00 69.54 0.85 19 120.28 0.37 32.6 0.41 0.48 1 0.00 45.0 40.43 0.00 70.72 0.85 20 120.69 0.37 32.7 0.41 0.48 1 0.00 45.0 40.46 0.00 70.72 0.85 21 121.10 0.37 31.7 0.41 0.48 1 0.00 45.0 40.66 0.00 71.09 0.85 22 121.51 0.37 31.6 0.41 0.48 1 0.00 45.0 40.20 0.00 70.32 0.85 23 121.92 0.36 30.7 0.42 0.48 1 0.00 45.0 39.95 0.00 69.89 0.85 24 122.34 0.35 30.7 0.42 0.48 1 0.00 45.0 39.04 0.00 68.28 0.85 25 122.75 0.35 29.7 0.42 0.48 1 0.00 45.0 38.26 0.00 66.97 0.85 26 27 28 29 30 31 32 33 34 35 36 37 38 123.17 123.59 124.02 124.44 124.87 125.30 125.73 126.16 126.60 127.03 127.47 127.91 128.36 0.34 0.32 0.31 0.29 0.27 0.25 0.22 0.19 0.16 0.13 0.10 0.06 0.02 29.7 28.7 28.7 27.6 27.7 26.6 26.6 25.7 25.6 24.6 24.6 23.6 23.6 0.42 0.42 0.42 0.43 0.43 0.43 0.43 0.44 0.44 0.44 0.44 0.44 0.44 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.48 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 45.0 36.86 0.00 35.56 0.00 33.71 0.00 31.89 0.00 29.52 0.00 27.16 0.00 24.31 0.00 21.38 0.00 18.01 0.00 14.52 0.00 10.67 0.00 6.59 0.00 2.21 0.00 X -S Area: 9.28 Path Length: 18.38 X -S Weight: 1021.15 64.52 62.30 59.06 55.96 51.77 47.73 42.71 37.63 31.71 25.61 18.83 11.66 3.91 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.86 0.86 DATA: Analysis 2 - Mining Condition Material Properties (4 materials) Material: 1 (Mohr -Coulomb Isotropic) - Sand and gravel, mixed grain size Cohesion Phi UnitWeight Ru 0.00 45.0 110.00 Auto Material: 2 (Mohr -Coulomb Isotropic) - OB - loose sand, mixed grain size Cohesion Phi UnitWeight Ru 0.00 34.0 99.00 Auto Material: 3 (Mohr -Coulomb Isotropic) - Bedrock - claystone Cohesion Phi UnitWeight Ru 20000.00 25.0 110.00 Auto Material: 4 (Mohr -Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 0.0 112.00 Auto Saturated: 0.00 0.0 115.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 0.000 Material Profiles (4 profiles) Profile: 1 (2 points) Material beneath: 2 - OB - loose sand, mixed grain size 0.00 4900.00 300.00 4900.00 Profile: 2 (2 points) Material beneath: 1 - Sand and gravel, mixed grain size 0.00 4897.00 300.00 4897.00 Profile: 3 (2 points) Material beneath: 3 - Bedrock - claystone 0.00 4850.00 300.00 4850.00 Profile: 4 (5 points) Material within: 4 - Slurry Wall 65.00 4895.00 70.00 4895.00 70.00 4845.00 65.00 4845.00 65.00 4895.00 Slope Surface (4 points) 1.00 4897.00 100.00 4897.00 139.00 4872.00 300.00 4872.00 Phreatic Surface (2 points) 0.00 4895.00 66.00 4895.00 Piezometric Surfaces (1 surface) Failure Surface (Critical, from previous analysis) Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 113.40 YL: 4888.41 XR: 128.80 YR: 4878.54 Centre: XC: 150.50 YC: 4929.35 Radius: R: 55.25 Earthquake Force Pseudo -static earthquake (seismic) coefficient: 0.050 Variable Restraints Parameter descriptor: XL XR R Range of variation: 25.00 20.00 10.50 Trial positions within range: 10 10 10 RESULTS: Analysis 2 - Mining Condition Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Factor of Safety for initial failure surface approximation: 1.423 There were: 881 successful analyses from a total of 1001 trial surfaces 120 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 1.40 Results Summary - Lowest 99 Factor of Safety circles Circle X -Left Y -Left X -Right Y -Right X -Centre Y -Centre Radius FoS 1 120.34 4883.96 123.24 4882.10 151.91 4930.01 55.83 1.401 <-- Critical Surface 2 120.34 4883.96 123.24 4882.10 153.17 4931.98 58.17 1.401 3 120.34 4883.96 123.24 4882.10 151.28 4929.03 54.67 1.401 4 120.34 4883.96 123.24 4882.10 152.54 4931.00 57.00 1.401 5 120.34 4883.96 123.24 4882.10 154.43 4933.94 60.50 1.401 6 120.34 4883.96 123.24 4882.10 153.80 4932.96 59.33 1.401 7 117.57 4885.74 121.02 4883.52 151.29 4934.56 59.33 1.401 8 120.34 4883.96 123.24 4882.10 149.39 4926.08 51.17 1.401 9 117.57 4885.74 121.02 4883.52 151.92 4935.54 60.50 1.401 10 120.34 4883.96 123.24 4882.10 150.65 4928.05 53.50 1.401 11 120.34 4883.96 123.24 4882.10 150.02 4927.06 52.33 1.401 12 117.57 4885.74 121.02 4883.52 150.66 4933.57 58.17 1.401 13 117.57 4885.74 121.02 4883.52 150.03 4932.59 57.00 1.401 14 117.57 4885.74 121.02 4883.52 148.77 4930.62 54.67 1.401 15 120.34 4883.96 123.24 4882.10 148.76 4925.10 50.00 1.401 16 117.57 4885.74 121.02 4883.52 148.14 4929.64 53.50 1.401 17 117.57 4885.74 121.02 4883.52 149.40 4931.61 55.83 1.401 18 125.90 4880.40 129.91 4877.83 160.53 4930.01 60.50 1.402 19 117.57 4885.74 121.02 4883.52 147.51 4928.66 52.33 1.402 20 117.57 4885.74 121.02 4883.52 146.25 4926.69 50.00 1.402 21 114.79 4887.52 118.80 4884.95 148.79 4936.15 59.33 1.402 22 117.57 4885.74 121.02 4883.52 146.88 4927.67 51.17 1.402 23 125.90 4880.40 129.91 4877.83 159.90 4929.02 59.33 1.402 24 114.79 4887.52 118.80 4884.95 149.42 4937.13 60.50 1.402 25 125.90 4880.40 129.91 4877.83 159.27 4928.04 58.17 1.402 26 114.79 4887.52 118.80 4884.95 148.16 4935.16 58.17 1.402 27 125.90 4880.40 129.91 4877.83 158.01 4926.07 55.83 1.402 28 114.79 4887.52 118.80 4884.95 146.27 4932.21 54.67 1.402 29 125.90 4880.40 129.91 4877.83 158.64 4927.06 57.00 1.402 30 114.79 4887.52 118.80 4884.95 146.90 4933.20 55.83 1.402 31 114.79 4887.52 118.80 4884.95 147.53 4934.18 57.00 1.402 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 125.90 125.90 114.79 114.79 123.12 114.79 123.12 125.90 123.12 125.90 123.12 114.79 125.90 123.12 123.12 123.12 120.34 120.34 123.12 120.34 123.12 120.34 120.34 123.12 120.34 117.57 120.34 117.57 117.57 120.34 117.57 120.34 125.90 4880.40 4880.40 4887.52 4887.52 4882.18 4887.52 4882.18 4880.40 4882.18 4880.40 4882.18 4887.52 4880.40 4882.18 4882.18 4882.18 4883.96 4883.96 4882.18 4883.96 4882.18 4883.96 4883.96 4882.18 4883.96 4885.74 4883.96 4885.74 4885.74 4883.96 4885.74 4883.96 4880.40 129.91 129.91 118.80 118.80 127.69 118.80 127.69 129.91 127.69 129.91 127.69 118.80 129.91 127.69 127.69 127.69 125.47 125.47 127.69 125.47 127.69 125.47 125.47 127.69 125.47 123.24 125.47 123.24 123.24 125.47 123.24 125.47 132.13 4877.83 4877.83 4884.95 4884.95 4879.25 4884.95 4879.25 4877.83 4879.25 4877.83 4879.25 4884.95 4877.83 4879.25 4879.25 4879.25 4880.68 4880.68 4879.25 4880.68 4879.25 4880.68 4880.68 4879.25 4880.68 4882.10 4880.68 4882.10 4882.10 4880.68 4882.10 4880.68 4876.40 157.38 156.75 145.64 145.01 158.03 144.38 157.40 156.12 156.76 155.49 156.13 143.75 154.86 154.87 155.50 154.24 155.51 154.88 153.61 154.25 152.98 153.62 152.99 152.35 152.36 153.00 151.73 152.37 151.74 151.10 151.11 150.47 161.60 4925.09 4924.11 4931.23 4930.25 4931.59 4929.26 4930.61 4923.12 4929.63 4922.14 4928.65 4928.28 4921.16 4926.68 4927.66 4925.70 4933.19 4932.20 4924.71 4931.22 4923.73 4930.24 4929.25 4922.74 4928.27 4934.77 4927.29 4933.79 4932.81 4926.30 4931.82 4925.32 4929.24 54.67 53.50 53.50 52.33 60.50 51.17 59.33 52.33 58.17 51.17 57.00 50.00 50.00 54.67 55.83 53.50 60.50 59.33 52.33 58.17 51.17 57.00 55.83 50.00 54.67 60.50 53.50 59.33 58.17 52.33 57.00 51.17 60.50 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.402 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 1.403 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 114.79 117.57 120.34 117.57 117.57 125.90 114.79 125.90 114.79 117.57 125.90 114.79 114.79 117.57 125.90 123.12 112.01 117.57 123.12 125.90 114.79 112.01 123.12 112.01 125.90 114.79 123.12 114.79 112.01 125.90 123.12 112.01 125.90 4887.52 4885.74 4883.96 4885.74 4885.74 4880.40 4887.52 4880.40 4887.52 4885.74 4880.40 4887.52 4887.52 4885.74 4880.40 4882.18 4889.30 4885.74 4882.18 4880.40 4887.52 4889.30 4882.18 4889.30 4880.40 4887.52 4882.18 4887.52 4889.30 4880.40 4882.18 4889.30 4880.40 121.02 123.24 125.47 123.24 123.24 132.13 121.02 132.13 121.02 123.24 132.13 121.02 121.02 123.24 132.13 129.91 118.80 123.24 129.91 132.13 121.02 118.80 129.91 118.80 132.13 121.02 129.91 121.02 118.80 132.13 129.91 118.80 132.13 4883.52 4882.10 4880.68 4882.10 4882.10 4876.40 4883.52 4876.40 4883.52 4882.10 4876.40 4883.52 4883.52 4882.10 4876.40 4877.83 4884.95 4882.10 4877.83 4876.40 4883.52 4884.95 4877.83 4884.95 4876.40 4883.52 4877.83 4883.52 4884.95 4876.40 4877.83 4884.95 4876.40 150.49 150.48 149.84 149.85 149.22 160.97 149.86 160.34 149.23 148.59 159.71 148.60 147.97 147.96 159.08 159.09 147.98 147.33 158.46 158.45 147.34 147.35 157.83 146.72 157.82 146.71 157.20 146.08 146.09 157.19 156.57 145.46 156.56 4936.36 4930.84 4924.33 4929.85 4928.87 4928.25 4935.38 4927.27 4934.39 4927.89 4926.29 4933.41 4932.42 4926.90 4925.30 4930.82 4937.94 4925.92 4929.84 4924.32 4931.44 4936.96 4928.85 4935.98 4923.33 4930.46 4927.87 4929.47 4934.99 4922.35 4926.88 4934.01 4921.36 60.50 55.83 50.00 54.67 53.50 59.33 59.33 58.17 58.17 52.33 57.00 57.00 55.83 51.17 55.83 60.50 60.50 50.00 59.33 54.67 54.67 59.33 58.17 58.17 53.50 53.50 57.00 52.33 57.00 52.33 55.83 55.83 51.17 1.403 1.403 1.403 1.403 1.403 1.403 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.404 1.405 1.405 1.405 98 120.34 4883.96 127.69 4879.25 156.58 4932.41 60.50 1.405 99 114.79 4887.52 121.02 4883.52 145.45 4928.49 51.17 1.405 Critical Failure Surface (circle 1) Intersects: XL: 120.34 YL: 4883.96 XR: 123.24 YR: 4882.10 Centre: XC: 151.91 YC: 4930.01 Radius: R: 55.83 Generated failure surface: (20 points) 120.34 4883.96 120.49 4883.86 120.64 4883.75 120.79 4883.65 120.95 4883.55 121.10 4883.45 121.25 4883.35 121.40 4883.25 121.55 4883.15 121.70 4883.06 121.86 4882.96 122.01 4882.86 122.16 4882.76 122.32 4882.67 122.47 4882.57 122.62 4882.48 122.78 4882.38 122.93 4882.29 123.09 4882.19 123.24 4882.10 Slice Geometry and Properties - Critical Failure Surface (circle 1, 38 slices) Slice X -S Base PoreWater Normal Test X -Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 120.34 0.00 34.4 0.07 0.09 1 0.00 45.0 0.02 0.00 0.14 0.81 2 120.42 0.00 34.4 0.07 0.09 1 0.00 45.0 0.04 0.00 0.36 0.81 3 120.49 0.00 34.1 0.08 0.09 1 0.00 45.0 0.07 0.00 0.62 0.81 4 120.57 0.00 34.1 0.08 0.09 1 0.00 45.0 0.09 0.00 0.80 0.81 5 120.64 0.00 33.8 0.08 0.09 1 0.00 45.0 0.11 0.00 0.98 0.81 6 120.72 0.00 34.0 0.08 0.09 1 0.00 45.0 0.13 0.00 1.16 0.81 7 120.79 0.00 34.0 0.08 0.09 1 0.00 45.0 0.15 0.00 1.34 0.81 8 120.87 0.00 33.7 0.08 0.09 1 0.00 45.0 0.17 0.00 1.49 0.81 9 120.95 0.00 33.4 0.08 0.09 1 0.00 45.0 0.18 0.00 1.64 0.81 10 121.02 0.00 33.7 0.08 0.09 1 0.00 45.0 0.20 0.00 1.78 0.81 11 121.10 0.00 33.6 0.08 0.09 1 0.00 45.0 0.21 0.00 1.89 0.81 12 121.17 0.00 33.4 0.08 0.09 1 0.00 45.0 0.22 0.00 2.01 0.81 13 121.25 0.00 33.0 0.08 0.09 1 0.00 45.0 0.24 0.00 2.13 0.81 14 121.32 0.00 33.3 0.08 0.09 1 0.00 45.0 0.24 0.00 2.16 0.81 15 121.40 0.00 33.2 0.08 0.09 1 0.00 45.0 0.25 0.00 2.23 0.81 16 121.48 0.00 33.0 0.08 0.09 1 0.00 45.0 0.26 0.00 2.31 0.81 17 121.55 0.00 32.9 0.08 0.09 1 0.00 45.0 0.26 0.00 2.35 0.81 18 121.63 0.00 32.7 0.08 0.09 1 0.00 45.0 0.27 0.00 2.40 0.81 19 121.70 0.00 32.6 0.08 0.09 1 0.00 45.0 0.27 0.00 2.40 0.81 20 121.78 0.00 32.6 0.08 0.09 1 0.00 45.0 0.26 0.00 2.36 0.81 21 121.86 0.00 32.6 0.08 0.09 1 0.00 45.0 0.26 0.00 2.36 0.82 22 121.93 0.00 32.6 0.08 0.09 1 0.00 45.0 0.26 0.00 2.36 0.82 23 122.01 0.00 32.2 0.08 0.09 1 0.00 45.0 0.26 0.00 2.30 0.82 24 122.09 0.00 32.2 0.08 0.09 1 0.00 45.0 0.26 0.00 2.30 0.82 25 122.16 0.00 32.2 0.08 0.09 1 0.00 45.0 0.24 0.00 2.19 0.82 26 122.24 0.00 32.2 0.08 0.09 1 0.00 45.0 0.24 0.00 2.15 0.82 27 122.32 0.00 31.9 0.08 0.09 1 0.00 45.0 0.23 0.00 2.05 0.82 28 122.39 0.00 31.9 0.08 0.09 1 0.00 45.0 0.21 0.00 1.93 0.82 29 122.47 0.00 31.8 0.08 0.09 1 0.00 45.0 0.20 0.00 1.82 0.82 30 122.55 0.00 31.6 0.08 0.09 1 0.00 45.0 0.19 0.00 1.68 0.82 31 122.62 0.00 31.5 0.08 0.09 1 0.00 45.0 0.17 0.00 1.53 0.82 32 122.70 0.00 31.5 0.08 0.09 1 0.00 45.0 0.15 0.00 1.35 0.82 33 122.78 0.00 31.5 0.08 0.09 1 0.00 45.0 0.13 0.00 1.20 0.82 34 122.86 0.00 31.5 0.08 0.09 1 0.00 45.0 0.11 0.00 1.01 0.82 35 122.93 0.00 31.1 0.08 0.09 1 0.00 45.0 0.09 0.00 0.83 0.82 36 123.01 0.00 31.1 0.08 0.09 1 0.00 45.0 0.07 0.00 0.60 0.82 37 123.09 0.00 30.8 0.08 0.09 1 0.00 45.0 0.04 0.00 0.38 0.82 38 123.17 0.00 31.1 0.08 0.09 1 0.00 45.0 0.01 0.00 0.11 0.82 X -S Area: 0.06 Path Length: 3.45 X -S Weight: 6.75 DATA: Analysis 3 - Reclaimed Condition Material Properties (4 materials) Material: 1 (Mohr -Coulomb Isotropic) - Sand and gravel, mixed grain size Cohesion Phi UnitWeight Ru 0.00 45.0 110.00 Auto Material: 2 (Mohr -Coulomb Isotropic) - OB - loose sand, mixed grain size Cohesion Phi UnitWeight Ru 0.00 34.0 99.00 Auto Material: 3 (Mohr -Coulomb Isotropic) - Bedrock - claystone Cohesion Phi UnitWeight Ru 20000.00 25.0 110.00 Auto Material: 4 (Mohr -Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 0.0 112.00 Auto Saturated: 0.00 0.0 115.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 0.000 Material Profiles (4 profiles) Profile: 1 (2 points) Material beneath: 2 - OB - loose sand, mixed grain size 0.00 4900.00 300.00 4900.00 Profile: 2 (2 points) Material beneath: 1 - Sand and gravel, mixed grain size 0.00 4897.00 300.00 4897.00 Profile: 3 (2 points) Material beneath: 3 - Bedrock - claystone 0.00 4850.00 300.00 4850.00 Profile: 4 (5 points) Material within: 4 - Slurry Wall 65.00 4895.00 70.00 4895.00 70.00 4845.00 65.00 4845.00 65.00 4895.00 Slope Surface (4 points) 1.00 4897.00 100.00 4897.00 175.00 4872.00 300.00 4872.00 Phreatic Surface (2 points) 0.00 4895.00 66.00 4895.00 Piezometric Surfaces (1 surface) Failure Surface Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 100.10 YL: 4896.97 XR: 149.10 YR: 4880.63 Centre: XC: 146.87 YC: 4955.60 Radius: R: 75.00 Variable Restraints Parameter descriptor: XL XR R Range of variation: 25.00 25.00 20.00 Trial positions within range: 20 20 10 RESULTS: Analysis 3 - Reclaimed Condition Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Factor of Safety for initial failure surface approximation: 3.170 There were: 4001 successful analyses from a total of 4001 trial surfaces Critical (minimum) Factor of Safety: 3.03 Results Summary - Lowest 99 Factor of Safety circles Circle X -Left Y -Left X -Right Y -Right X -Centre Y -Centre Radius FoS 1 112.60 4892.80 136.60 4884.80 151.18 4968.54 85.00 3.030 <-- Critical Surface 2 112.60 4892.80 136.60 4884.80 150.47 4966.41 82.78 3.032 3 112.60 4892.80 137.92 4884.36 151.80 4968.22 85.00 3.033 4 111.28 4893.24 136.60 4884.80 150.49 4968.66 85.00 3.033 5 112.60 4892.80 136.60 4884.80 149.76 4964.27 80.56 3.033 6 112.60 4892.80 137.92 4884.36 151.09 4966.08 82.78 3.035 7 111.28 4893.24 136.60 4884.80 149.78 4966.52 82.78 3.035 8 112.60 4892.80 136.60 4884.80 149.05 4962.14 78.33 3.035 9 109.97 4893.68 136.60 4884.80 149.80 4968.77 85.00 3.037 10 111.28 4893.24 137.92 4884.36 151.11 4968.33 85.00 3.037 11 112.60 4892.80 139.23 4883.92 152.43 4967.89 85.00 3.037 12 111.28 4893.24 136.60 4884.80 149.07 4964.39 80.56 3.037 13 112.60 4892.80 137.92 4884.36 150.38 4963.95 80.56 3.037 14 112.60 4892.80 136.60 4884.80 148.33 4960.00 76.11 3.038 15 112.60 4892.80 139.23 4883.92 151.71 4965.75 82.78 3.039 16 111.28 4893.24 137.92 4884.36 150.40 4966.19 82.78 3.039 17 109.97 4893.68 136.60 4884.80 149.08 4966.63 82.78 3.039 18 111.28 4893.24 136.60 4884.80 148.35 4962.25 78.33 3.039 19 112.60 4892.80 137.92 4884.36 149.67 4961.81 78.33 3.039 20 112.60 4892.80 136.60 4884.80 147.62 4957.86 73.89 3.040 21 109.97 4893.68 137.92 4884.36 150.42 4968.44 85.00 3.041 22 111.28 4893.24 139.23 4883.92 151.73 4968.00 85.00 3.041 23 108.65 4894.12 136.60 4884.80 149.10 4968.88 85.00 3.041 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 112.60 112.60 111.28 109.97 112.60 111.28 112.60 108.65 111.28 109.97 112.60 112.60 109.97 111.28 112.60 111.28 111.28 109.97 107.34 108.65 112.60 112.60 108.65 109.97 111.28 112.60 112.60 111.28 109.97 111.28 112.60 111.28 109.97 4892.80 4892.80 4893.24 4893.68 4892.80 4893.24 4892.80 4894.12 4893.24 4893.68 4892.80 4892.80 4893.68 4893.24 4892.80 4893.24 4893.24 4893.68 4894.55 4894.12 4892.80 4892.80 4894.12 4893.68 4893.24 4892.80 4892.80 4893.24 4893.68 4893.24 4892.80 4893.24 4893.68 140.55 139.23 137.92 136.60 137.92 136.60 136.60 136.60 139.23 137.92 140.55 139.23 136.60 137.92 137.92 136.60 140.55 139.23 136.60 137.92 141.86 136.60 136.60 137.92 139.23 140.55 139.23 137.92 136.60 136.60 137.92 140.55 139.23 4883.48 4883.92 4884.36 4884.80 4884.36 4884.80 4884.80 4884.80 4883.92 4884.36 4883.48 4883.92 4884.80 4884.36 4884.36 4884.80 4883.48 4883.92 4884.80 4884.36 4883.05 4884.80 4884.80 4884.36 4883.92 4883.48 4883.92 4884.36 4884.80 4884.80 4884.36 4883.48 4883.92 153.05 151.00 149.68 148.37 148.95 147.64 146.91 148.39 151.02 149.70 152.33 150.29 147.66 148.97 148.24 146.92 152.35 151.03 148.40 149.72 153.66 146.19 147.67 148.99 150.30 151.62 149.57 148.26 146.94 146.21 147.52 151.63 150.32 4967.56 4963.61 4964.05 4964.49 4959.67 4960.11 4955.72 4966.73 4965.86 4966.30 4965.42 4961.47 4962.35 4961.91 4957.53 4957.96 4967.66 4968.10 4968.98 4968.54 4967.22 4953.58 4964.59 4964.15 4963.71 4963.28 4959.33 4959.77 4960.21 4955.82 4955.38 4965.52 4965.96 85.00 80.56 80.56 80.56 76.11 76.11 71.67 82.78 82.78 82.78 82.78 78.33 78.33 78.33 73.89 73.89 85.00 85.00 85.00 85.00 85.00 69.44 80.56 80.56 80.56 80.56 76.11 76.11 76.11 71.67 71.67 82.78 82.78 3.041 3.041 3.041 3.041 3.042 3.042 3.042 3.043 3.043 3.043 3.043 3.044 3.044 3.044 3.044 3.044 3.045 3.045 3.045 3.045 3.045 3.045 3.045 3.045 3.046 3.046 3.046 3.046 3.046 3.047 3.047 3.047 3.047 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 112.60 107.34 108.65 108.65 111.28 109.97 112.60 112.60 112.60 108.65 109.97 107.34 111.28 106.02 111.28 109.97 112.60 108.65 107.34 111.28 109.97 112.60 111.28 112.60 111.28 109.97 108.65 112.60 109.97 108.65 112.60 111.28 106.02 4892.80 4894.55 4894.12 4894.12 4893.24 4893.68 4892.80 4892.80 4892.80 4894.12 4893.68 4894.55 4893.24 4894.99 4893.24 4893.68 4892.80 4894.12 4894.55 4893.24 4893.68 4892.80 4893.24 4892.80 4893.24 4893.68 4894.12 4892.80 4893.68 4894.12 4892.80 4893.24 4894.99 141.86 136.60 137.92 136.60 139.23 137.92 140.55 136.60 143.18 139.23 140.55 137.92 141.86 136.60 137.92 136.60 139.23 137.92 136.60 140.55 139.23 141.86 136.60 137.92 139.23 137.92 136.60 140.55 140.55 139.23 136.60 141.86 136.60 4883.05 4884.80 4884.36 4884.80 4883.92 4884.36 4883.48 4884.80 4882.61 4883.92 4883.48 4884.36 4883.05 4884.80 4884.36 4884.80 4883.92 4884.36 4884.80 4883.48 4883.92 4883.05 4884.80 4884.36 4883.92 4884.36 4884.80 4883.48 4883.48 4883.92 4884.80 4883.05 4884.80 152.95 147.69 149.00 146.96 149.59 148.27 150.90 145.48 154.28 150.33 151.65 149.02 152.97 147.70 147.54 146.23 148.86 148.29 146.97 150.92 149.60 152.23 145.49 146.81 148.87 147.56 146.24 150.19 150.93 149.62 144.76 152.25 146.99 4965.08 4966.83 4966.39 4962.45 4961.57 4962.01 4961.13 4951.43 4966.88 4968.19 4967.76 4968.63 4967.32 4969.07 4957.62 4958.06 4957.18 4964.25 4964.69 4963.37 4963.81 4962.93 4953.67 4953.23 4959.42 4959.86 4960.30 4958.98 4965.61 4966.05 4949.29 4965.17 4966.92 82.78 82.78 82.78 78.33 78.33 78.33 78.33 67.22 85.00 85.00 85.00 85.00 85.00 85.00 73.89 73.89 73.89 80.56 80.56 80.56 80.56 80.56 69.44 69.44 76.11 76.11 76.11 76.11 82.78 82.78 65.00 82.78 82.78 3.047 3.047 3.047 3.048 3.048 3.048 3.048 3.048 3.049 3.049 3.049 3.049 3.049 3.049 3.049 3.049 3.049 3.050 3.050 3.050 3.050 3.050 3.050 3.050 3.051 3.051 3.051 3.051 3.052 3.052 3.052 3.052 3.052 90 91 92 93 94 95 96 97 98 99 107.34 112.60 109.97 112.60 111.28 109.97 108.65 111.28 112.60 107.34 4894.55 4892.80 4893.68 4892.80 4893.24 4893.68 4894.12 4893.24 4892.80 4894.55 137.92 143.18 136.60 139.23 137.92 139.23 137.92 140.55 141.86 136.60 Critical Failure Surface (circle 1) 4884.36 4882.61 4884.80 4883.92 4884.36 4883.92 4884.36 4883.48 4883.05 4884.80 148.30 153.56 145.51 148.14 146.82 148.89 147.57 150.20 151.52 146.25 4966.48 4964.73 4955.91 4955.03 4955.47 4961.66 4962.10 4961.22 4960.78 4962.54 82.78 82.78 71.67 71.67 71.67 78.33 78.33 78.33 78.33 78.33 Intersects: XL: 112.60 YL: 4892.80 XR: 136.60 YR: 4884.80 Centre: XC: 151.18 YC: 4968.54 Radius: R: 85.00 Generated failure surface: (20 points) 112.60 4890.52 118.67 4888.12 124.94 4886.20 131.37 4884.80 4892.80 4890.00 4887.69 4885.88 113.80 4892.20 119.91 4889.50 126.21 4887.29 132.67 4885.58 115.00 4891.62 121.15 4889.02 127.49 4886.91 133.97 4885.30 3.052 3.052 3.052 3.052 3.052 3.053 3.053 3.053 3.053 3.053 116.21 4891.06 122.41 4888.56 128.78 4886.55 135.29 4885.04 Slice Geometry and Properties - Critical Failure Surface (circle 1, 38 slices) Slice X -S Base X -Left Area Angle Width Length Matl Cohesion Phi Factor PoreWater 117.44 123.67 130.07 136.60 Normal Test Weight Force Stress 1 112.60 0.03 26.6 0.60 0.67 1 0.00 45.0 3.28 0.00 2 113.20 0.09 26.5 0.60 0.67 1 0.00 45.0 9.79 0.00 3 113.80 0.15 25.6 0.60 0.67 1 0.00 45.0 16.11 0.00 4 114.40 0.20 25.6 0.60 0.67 1 0.00 45.0 21.94 0.00 4.70 0.96 14.07 0.96 23.09 0.96 31.44 0.96 5 115.00 0.25 24.8 0.61 0.67 1 0.00 45.0 27.67 0.00 39.58 0.96 6 115.61 0.30 24.8 0.61 0.67 1 0.00 45.0 32.79 0.00 46.90 0.96 7 116.21 0.34 23.8 0.61 0.67 1 0.00 45.0 37.88 0.00 54.10 0.95 8 116.83 0.38 23.8 0.61 0.67 1 0.00 45.0 42.32 0.00 60.42 0.95 9 117.44 0.43 22.9 0.62 0.67 1 0.00 45.0 46.77 0.00 66.69 0.95 10 118.05 0.46 23.0 0.62 0.67 1 0.00 45.0 50.47 0.00 71.95 0.95 11 118.67 0.49 22.1 0.62 0.67 1 0.00 45.0 54.23 0.00 77.22 0.95 12 119.29 0.52 22.0 0.62 0.67 1 0.00 45.0 57.22 0.00 81.50 0.95 13 119.91 0.55 21.1 0.62 0.67 1 0.00 45.0 60.26 0.00 85.75 0.95 14 120.53 0.57 21.2 0.62 0.67 1 0.00 45.0 62.53 0.00 88.97 0.95 15 121.15 0.59 20.3 0.63 0.67 1 0.00 45.0 64.82 0.00 92.17 0.95 16 121.78 0.60 20.2 0.63 0.67 1 0.00 45.0 66.34 0.00 94.34 0.95 17 122.41 0.62 19.3 0.63 0.67 1 0.00 45.0 67.87 0.00 96.47 0.95 18 123.04 0.62 19.3 0.63 0.67 1 0.00 45.0 68.61 0.00 97.53 0.95 19 123.67 0.63 18.4 0.63 0.67 1 0.00 45.0 69.39 0.00 98.61 0.95 20 124.30 0.63 18.4 0.63 0.67 1 0.00 45.0 69.39 0.00 98.63 0.95 21 124.94 0.63 17.6 0.64 0.67 1 0.00 45.0 69.34 0.00 98.53 0.95 22 125.57 0.62 17.5 0.64 0.67 1 0.00 45.0 68.58 0.00 97.48 0.95 23 126.21 0.62 16.6 0.64 0.67 1 0.00 45.0 67.75 0.00 96.33 0.95 24 126.85 0.60 16.6 0.64 0.67 1 0.00 45.0 66.16 0.00 94.06 0.95 25 127.49 0.59 15.7 0.64 0.67 1 0.00 45.0 64.53 0.00 91.80 0.95 26 128.13 0.57 15.8 0.64 0.67 1 0.00 45.0 62.18 0.00 88.44 0.95 27 128.78 0.54 14.8 0.65 0.67 1 0.00 45.0 59.71 0.00 85.01 0.95 28 129.42 0.51 14.8 0.65 0.67 1 0.00 45.0 56.55 0.00 80.52 0.95 29 130.07 0.48 13.9 0.65 0.67 1 0.00 45.0 53.23 0.00 75.87 0.95 30 130.72 0.45 14.0 0.65 0.67 1 0.00 45.0 49.26 0.00 70.19 0.95 31 131.37 0.41 13.0 0.65 0.67 1 0.00 45.0 45.07 0.00 64.31 0.95 32 132.02 0.37 13.0 0.65 0.67 1 0.00 45.0 40.35 0.00 57.59 0.95 33 132.67 0.32 12.1 0.65 0.67 1 0.00 45.0 35.34 0.00 50.50 0.96 34 133.32 0.27 12.1 0.65 0.67 1 0.00 45.0 29.76 0.00 42.54 0.96 35 133.97 0.22 11.2 0.66 0.67 1 0.00 45.0 23.87 0.00 34.18 0.96 36 134.63 0.16 11.2 0.66 0.67 1 0.00 45.0 17.53 0.00 25.10 0.96 37 135.29 0.10 10.3 0.66 0.67 1 0.00 45.0 10.80 0.00 15.50 0.96 38 135.94 0.03 10.4 0.66 0.67 1 0.00 45.0 3.60 0.00 5.17 0.96 X -S Area: 15.94 Path Length: 25.39 X -S Weight: 1753.30 DATA: Analysis 4 - Reclaimed Condition Material Properties (4 materials) Material: 1 (Mohr -Coulomb Isotropic) - Sand and gravel, mixed grain size Cohesion Phi UnitWeight Ru 0.00 45.0 110.00 Auto Material: 2 (Mohr -Coulomb Isotropic) - OB - loose sand, mixed grain size Cohesion Phi UnitWeight Ru 0.00 34.0 99.00 Auto Material: 3 (Mohr -Coulomb Isotropic) - Bedrock - claystone Cohesion Phi UnitWeight Ru 20000.00 25.0 110.00 Auto Material: 4 (Mohr -Coulomb Isotropic) - Slurry Wall Cohesion Phi UnitWeight Ru Unsaturated: 0.00 0.0 112.00 Auto Saturated: 0.00 0.0 115.00 Auto Water Properties Unit weight of water: 62.400 Unit weight of water/medium above ground: 0.000 Material Profiles (4 profiles) Profile: 1 (2 points) Material beneath: 2 - OB - loose sand, mixed grain size 0.00 4900.00 300.00 4900.00 Profile: 2 (2 points) Material beneath: 1 - Sand and gravel, mixed grain size 0.00 4897.00 300.00 4897.00 Profile: 3 (2 points) Material beneath: 3 - Bedrock - claystone 0.00 4850.00 300.00 4850.00 Profile: 4 (5 points) Material within: 4 - Slurry Wall 65.00 4895.00 70.00 4895.00 70.00 4845.00 65.00 4845.00 65.00 4895.00 Slope Surface (4 points) 1.00 4897.00 100.00 4897.00 175.00 4872.00 300.00 4872.00 Phreatic Surface (2 points) 0.00 4895.00 66.00 4895.00 Piezometric Surfaces (1 surface) Failure Surface (Critical, from previous analysis) Initial circular surface for critical search defined by: XL,XR,R Intersects: XL: 112.60 YL: 4892.80 XR: 136.60 YR: 4884.80 Centre: XC: 151.18 YC: 4968.54 Radius: R: 85.00 Earthquake Force Pseudo -static earthquake (seismic) coefficient: 0.050 Variable Restraints Parameter descriptor: XL XR R Range of variation: 25.00 25.00 20.00 Trial positions within range: 20 20 10 RESULTS: Analysis 4 - Reclaimed Condition Bishop Simplified Method of Analysis - Circular Failure Surface Critical Failure Surface Search using Multiple Circle Generation Techniques Factor of Safety for initial failure surface approximation: 2.592 There were: 3896 successful analyses from a total of 4001 trial surfaces 105 analyses terminated due to unacceptable geometry Critical (minimum) Factor of Safety: 2.57 Results Summary - Lowest 99 Factor of Safety circles Circle X -Left 1 121.15 Surface 2 122.47 3 121.15 4 122.47 5 122.47 6 122.47 7 122.47 8 121.15 9 119.84 10 123.78 Y -Left X -Right Y -Right X -Centre Y -Centre Radius FoS 4889.95 125.42 4888.53 4889.51 4889.95 4889.51 4889.51 4889.51 4889.51 4889.95 4890.39 4889.07 126.73 125.42 126.73 126.73 126.73 126.73 125.42 124.10 128.05 4888.09 4888.53 4888.09 4888.09 4888.09 4888.09 4888.53 4888.97 4887.65 153.32 4979.34 154.64 152.62 152.53 153.23 151.83 153.94 151.21 149.19 151.73 4978.90 4977.23 4972.57 4974.68 4970.46 4976.79 4973.01 4971.34 4965.81 95.00 2.565 <-- Critical 95.00 92.78 88.33 90.56 86.11 92.78 88.33 86.11 81.67 2.565 2.565 2.566 2.566 2.566 2.566 2.566 2.566 2.566 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 125.10 119.84 121.15 125.10 123.78 123.78 125.10 119.84 122.47 123.78 123.78 122.47 121.15 121.15 119.84 125.10 122.47 121.15 125.10 122.47 125.10 121.15 121.15 121.15 121.15 123.78 119.84 123.78 123.78 123.78 118.52 125.10 125.10 4888.63 4890.39 4889.95 4888.63 4889.07 4889.07 4888.63 4890.39 4889.51 4889.07 4889.07 4889.51 4889.95 4889.95 4890.39 4888.63 4889.51 4889.95 4888.63 4889.51 4888.63 4889.95 4889.95 4889.95 4889.95 4889.07 4890.39 4889.07 4889.07 4889.07 4890.83 4888.63 4888.63 129.36 124.10 125.42 129.36 128.05 128.05 130.68 124.10 126.73 128.05 128.05 126.73 125.42 125.42 124.10 129.36 126.73 125.42 129.36 126.73 129.36 125.42 125.42 126.73 125.42 128.05 125.42 128.05 128.05 129.36 124.10 129.36 129.36 4887.21 4888.97 4888.53 4887.21 4887.65 4887.65 4886.77 4888.97 4888.09 4887.65 4887.65 4888.09 4888.53 4888.53 4888.97 4887.21 4888.09 4888.53 4887.21 4888.09 4887.21 4888.53 4888.53 4888.09 4888.53 4887.65 4888.53 4887.65 4887.65 4887.21 4888.97 4887.21 4887.21 155.86 147.78 151.92 156.56 153.84 155.95 157.92 148.48 148.31 149.62 154.54 150.42 148.40 150.51 147.08 153.04 151.12 149.11 154.45 149.72 155.15 147.70 147.00 153.97 149.81 150.32 152.66 155.24 152.43 153.08 150.63 153.75 152.34 4973.81 4967.12 4975.12 4975.91 4972.14 4978.46 4977.78 4969.23 4959.92 4959.48 4974.24 4966.24 4964.57 4970.90 4965.02 4965.37 4968.35 4966.68 4969.59 4964.14 4971.70 4962.47 4960.36 4979.10 4968.79 4961.59 4979.54 4976.35 4967.92 4967.68 4977.87 4967.48 4963.26 90.56 81.67 90.56 92.78 88.33 95.00 95.00 83.89 75.00 75.00 90.56 81.67 79.44 86.11 79.44 81.67 83.89 81.67 86.11 79.44 88.33 77.22 75.00 95.00 83.89 77.22 95.00 92.78 83.89 83.89 92.78 83.89 79.44 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 123.78 123.78 122.47 119.84 122.47 118.52 121.15 121.15 122.47 119.84 118.52 119.84 123.78 121.15 122.47 125.10 125.10 123.78 125.10 123.78 122.47 123.78 119.84 119.84 122.47 123.78 118.52 125.10 122.47 123.78 121.15 122.47 123.78 4889.07 4889.07 4889.51 4890.39 4889.51 4890.83 4889.95 4889.95 4889.51 4890.39 4890.83 4890.39 4889.07 4889.95 4889.51 4888.63 4888.63 4889.07 4888.63 4889.07 4889.51 4889.07 4890.39 4890.39 4889.51 4889.07 4890.83 4888.63 4889.51 4889.07 4889.95 4889.51 4889.07 129.36 128.05 126.73 124.10 128.05 124.10 126.73 126.73 128.05 125.42 124.10 124.10 129.36 126.73 128.05 130.68 130.68 128.05 130.68 129.36 128.05 129.36 125.42 125.42 128.05 129.36 124.10 130.68 128.05 129.36 126.73 128.05 129.36 4887.21 4887.65 4888.09 4888.97 4887.65 4888.97 4888.09 4888.09 4887.65 4888.53 4888.97 4888.97 4887.21 4888.09 4887.65 4886.77 4886.77 4887.65 4886.77 4887.21 4887.65 4887.21 4888.53 4888.53 4887.65 4887.21 4888.97 4886.77 4887.65 4887.21 4888.09 4887.65 4887.21 155.89 153.13 149.01 145.67 153.18 148.52 151.86 153.27 153.88 148.44 149.93 146.38 152.38 152.57 155.29 155.81 156.51 151.03 157.22 155.19 154.59 154.49 150.55 147.73 152.48 151.68 149.22 153.70 151.07 156.60 151.16 151.77 153.78 4976.12 4970.03 4962.03 4960.80 4972.33 4971.54 4972.77 4976.99 4974.44 4966.88 4975.76 4962.91 4965.57 4974.88 4978.66 4971.46 4973.57 4963.70 4975.67 4974.01 4976.55 4971.90 4973.21 4964.77 4970.22 4963.46 4973.65 4965.13 4966.01 4978.23 4970.66 4968.12 4969.79 92.78 86.11 77.22 75.00 88.33 86.11 88.33 92.78 90.56 81.67 90.56 77.22 81.67 90.56 95.00 88.33 90.56 79.44 92.78 90.56 92.78 88.33 88.33 79.44 86.11 79.44 88.33 81.67 81.67 95.00 86.11 83.89 86.11 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.566 2.567 2.567 2.567 2.567 2.567 2.567 2.567 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 118.52 119.84 118.52 121.15 118.52 119.84 125.10 125.10 125.10 125.10 121.15 125.10 119.84 122.47 118.52 119.84 121.15 125.10 121.15 121.15 117.21 123.78 125.10 4890.83 4890.39 4890.83 4889.95 4890.83 4890.39 4888.63 4888.63 4888.63 4888.63 4889.95 4888.63 4890.39 4889.51 4890.83 4890.39 4889.95 4888.63 4889.95 4889.95 4891.27 4889.07 4888.63 124.10 125.42 124.10 126.73 124.10 125.42 129.36 130.68 130.68 129.36 126.73 130.68 125.42 128.05 124.10 125.42 126.73 131.99 128.05 126.73 124.10 130.68 130.68 Critical Failure Surface (circle 1) 4888.97 4888.53 4888.97 4888.09 4888.97 4888.53 4887.21 4886.77 4886.77 4887.21 4888.09 4886.77 4888.53 4887.65 4888.97 4888.53 4888.09 4886.33 4887.65 4888.09 4888.97 4886.77 4886.77 147.82 151.95 147.12 149.05 151.33 151.25 150.94 153.00 154.40 151.64 148.35 155.11 147.03 149.66 145.01 149.84 149.75 158.57 154.62 150.46 149.97 157.25 152.29 4969.43 4977.43 4967.32 4964.33 4979.98 4975.32 4959.04 4963.02 4967.24 4961.15 4962.22 4969.35 4962.66 4961.79 4960.99 4971.10 4966.44 4977.54 4978.86 4968.55 4978.06 4977.98 4960.91 83.89 92.78 81.67 79.44 95.00 90.56 75.00 79.44 83.89 77.22 77.22 86.11 77.22 77.22 75.00 86.11 81.67 95.00 95.00 83.89 92.78 95.00 77.22 Intersects: XL: 121.15 YL: 4889.95 XR: 125.42 YR: 4888.53 Centre: XC: 153.32 YC: 4979.34 Radius: R: 95.00 Generated failure surface: (20 points) 121.15 4889.95 121.38 4889.87 121.60 4889.79 4889.63 122.27 4889.56 122.49 4889.48 122.72 4889.40 4889.25 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 2.567 121.82 4889.71 122.04 122.94 4889.33 123.16 123.39 4889.18 4888.88 124.51 4888.81 4888.53 123.61 4889.10 124.74 4888.74 123.84 4889.03 124.96 4888.67 124.06 4888.95 124.29 125.19 4888.60 125.42 Slice Geometry and Properties - Critical Failure Surface (circle 1, 38 slices) Slice X -S Base PoreWater Normal Test X -Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor 1 121.15 0.00 19.8 0.11 0.12 1 0.00 45.0 2 121.26 0.00 19.8 0.11 0.12 1 0.00 45.0 3 121.38 0.00 19.5 0.11 0.12 1 0.00 45.0 4 121.49 0.00 19.5 0.11 0.12 1 0.00 45.0 5 121.60 0.00 19.3 0.11 0.12 1 0.00 45.0 6 121.71 0.00 19.5 0.11 0.12 1 0.00 45.0 7 121.82 0.00 19.3 0.11 0.12 1 0.00 45.0 8 121.93 0.00 19.3 0.11 0.12 1 0.00 45.0 9 122.04 0.00 19.1 0.11 0.12 1 0.00 45.0 10 122.16 0.00 19.3 0.11 0.12 1 0.00 45.0 11 122.27 0.00 19.0 0.11 0.12 1 0.00 45.0 12 122.38 0.00 19.0 0.11 0.12 1 0.00 45.0 13 122.49 0.00 18.8 0.11 0.12 1 0.00 45.0 14 122.60 0.00 19.0 0.11 0.12 1 0.00 45.0 15 122.72 0.00 18.6 0.11 0.12 1 0.00 45.0 16 122.83 0.00 18.8 0.11 0.12 1 0.00 45.0 17 122.94 0.00 18.8 0.11 0.12 1 0.00 45.0 18 123.05 0.00 18.5 0.11 0.12 1 0.00 45.0 19 123.16 0.00 18.5 0.11 0.12 1 0.00 45.0 20 123.28 0.00 18.3 0.11 0.12 1 0.00 45.0 21 123.39 0.00 18.3 0.11 0.12 1 0.00 45.0 22 123.50 0.00 18.3 0.11 0.12 1 0.00 45.0 23 123.61 0.00 18.3 0.11 0.12 1 0.00 45.0 24 123.72 0.00 18.1 0.11 0.12 1 0.00 45.0 0.02 0.00 0.05 0.00 0.09 0.00 0.12 0.00 0.14 0.00 0.17 0.00 0.19 0.00 0.22 0.00 0.24 0.00 0.26 0.00 0.28 0.00 0.29 0.00 0.31 0.00 0.32 0.00 0.33 0.00 0.33 0.00 0.34 0.00 0.34 0.00 0.35 0.00 0.35 0.00 0.34 0.00 0.34 0.00 0.34 0.00 0.33 0.00 0.14 0.42 0.71 0.94 1.13 1.32 1.51 1.70 1.89 2.03 2.18 2.27 2.42 2.51 2.61 2.61 2.70 2.71 2.76 2.76 2.71 2.71 2.66 2.57 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 0.93 25 123.84 0.00 18.0 0.11 0.12 1 0.00 45.0 0.33 0.00 2.57 0.93 26 123.95 0.00 18.0 0.11 0.12 1 0.00 45.0 0.31 0.00 2.48 0.93 27 124.06 0.00 17.8 0.11 0.12 1 0.00 45.0 0.30 0.00 2.34 0.93 28 124.17 0.00 17.8 0.11 0.12 1 0.00 45.0 0.28 0.00 2.20 0.93 29 124.29 0.00 17.8 0.11 0.12 1 0.00 45.0 0.26 0.00 2.05 0.93 30 124.40 0.00 17.8 0.11 0.12 1 0.00 45.0 0.24 0.00 1.91 0.93 31 124.51 0.00 17.5 0.11 0.12 1 0.00 45.0 0.22 0.00 1.72 0.93 32 124.63 0.00 17.5 0.11 0.12 1 0.00 45.0 0.21 0.00 1.63 0.93 33 124.74 0.00 17.5 0.11 0.12 1 0.00 45.0 0.18 0.00 1.39 0.93 34 124.85 0.00 17.3 0.11 0.12 1 0.00 45.0 0.15 0.00 1.15 0.93 35 124.96 0.00 17.3 0.11 0.12 1 0.00 45.0 0.12 0.00 0.91 0.93 36 125.08 0.00 17.3 0.11 0.12 1 0.00 45.0 0.08 0.00 0.67 0.93 37 125.19 0.00 17.3 0.11 0.12 1 0.00 45.0 0.05 0.00 0.43 0.93 38 125.30 0.00 17.1 0.11 0.12 1 0.00 45.0 0.02 0.00 0.14 0.93 X -S Area: 0.08 Path Length: 4.49 X -S Weight: 8.82 STATE OF COLORADO DIVISION OF RECLAMATION, MINING AND SAFETY Department of Natural Resources 1313 Sherman St., Room 215 Denver, Colorado 80203 Phone: (303) 866-3567 FAX: (303) 832-8106 APPLICABILITY: CONSTRUCTION MATERIAL REGULAR (112) OPERATION RECLAMATION PERMIT APPLICATION PACKAGE COLORADO DIVISION OF RECLAMATION MINING - &- SAF ETY 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 41 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. 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 Phone: (303) 866-3567 FAX: (303) 832-8106 CONSTRUCTION MATERIALS REGULAR (112) OPERATION RECLAMATION PERMIT APPLICATION FORM COLORADO DIVISION OF RECLAMATION MINING ---- &— SAFETY CHECK ONE: There is a File Number Already Assigned to this Operation Permit # M - (Please reference the file number currently assigned to this operation) I' P New Application (Rule 1.4.5) Conversion Application (Rule 1.11) P Amendment Application (Rule 1.10) Permit # M - (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): Asphalt Specialties Co., Inc. 1.1 Type of organization (corporation, partnership, etc.): 2. Operation name (pit, mine or site name): 3. Permitted acreage (new or existing site): 3.1 Change in acreage (+) 3.2 Total acreage in Permit area Marcovich Mining Resource 4. Fees: 4.1 New Application 4.2 New Quarry Application 4.4 Amendment Fee 4.5 Conversion to 112 operation (set by statute) 5. Primary commoditie(s) to be mined: sand gravel 5.1 Incidental commoditie(s) to be mined: 1. lbs/Tons/yr 3. / lbs/Tons/yr 4. / lbs/Tons/yr 57.28 permitted acres acres acres $2,696.00 $3,342.00 $2,229.00 $2,696.00 2. / 5. / application fee quarry application amendment fee conversion fee lbs/Tons/yr lbs/Tons/yr 5.2 Anticipated end use of primary commoditie(s) to be mined: 5.3 Anticipated end use of incidental commoditie(s) to be mined: -2- 6. Name of owner of subsurface rights of affected land: refer to Exhibit O If 2 or more owners, "refer to Exhibit 0". 7. Name of owner of surface of affected land: refer to Exhibit O 8. Type of mining operation: Surface Underground 9. Location Information: The center of the area where the majority of mining will occur: COUNTY: Weld PRINCIPAL MERIDIAN (check one): SECTION (write number): TOWNSHIP (write number and check direction): RANGE (write number and check direction): QUARTER SECTION (check one): QUARTER/QUARTER SECTION (check one): 6th (Colorado) S7 T1 P 10th (New Mexico) R 66 P P NE NE P p p NW North East NW p P Iv p SE SE p p South West P SW SW Ute GENERAL DESCRIPTION: (the number of miles and direction from the nearest town and the approximate elevation): 3 miles southwest of Fort Lupton. Elevation 4908 feet. 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 06158 (5 decimal places) Longitude(W) -104 81903 (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: Daniel Hunt Title: President Company Name: Asphalt Specialties Co., Inc Street/P.O. Box: 345 W. 62nd Ave P.O. Box: City: Denver State: Colorado Zip Code: 80216 Telephone Number: (303 ) - 289-8555 Fax Number: (303 ) _ 289-7707 PERMITTING CONTACT (if different from applicant/operator above) Contact's Name: Company Name: Street/P.O. Box: City: State: Telephone Number: Fax Number: INSPECTION CONTACT Contact's Name: Company Name: Street/P.O. Box: City: State: Telephone Number: Fax Number: Greg Geras Asphalt Specialties Co., Inc Title: Land Resource Manager 345 W 62nd Ave Denver P.O. Box: Colorado Zip Code: 80216 (303 ) _ 289-8555 (303 ) _ 289-7707 Greg Geras Asphalt Specialties Co., Inc Title: Land Resource Manager 345 W 62nd Ave Denver P.O. Box: Colorado Zip Code: 80216 (303 ) _ 289-8555 (303 ) _ 289-7707 CC: STATE OR FEDERAL LANDOWNER (if any) Agency: N/a Street: City: State: Zip Code: Telephone Number: ( ) - CC: STATE OR FEDERAL LANDOWNER (if any) Agency: Street: City: State: Telephone Number: N/a Zip Code: ( ) -4- 12. Primary future (Post -mining) land use (check one): P P P Cropland(CR) Rangeland(RL) Residential(RS) p p p Pastureland(PL) Forestry(FR) Recreation(RC) Developed Water Resources(WR) 13. Primary present land use (check one): Cropland(CR) Rangeland(RL) Residential(RS) p P P P p p p Pastureland(PL) Forestry(FR) Recreation(RC) Developed Water Resources(WR) p p p p p P General Agriculture(GA) Wildlife Habitat(WL) Industrial/Commercial(IC) Solid Waste Disposal(WD) General Agriculture(GA) Wildlife Habitat(WL) Industrial/Commercial(IC) 14. Method of Mining: Briefly explain mining method (e.g. truck/shovel): loaders, dozers and haul trucks 15. On Site Processing: Crushing/Screening 13.1 Briefly explain mining method (e.g. truck/shovel): List any designated chemicals or acid -producing materials to be used or stored within permit area: 16. Description of Amendment or Conversion: If you are amending or converting an existing operation, provide a brief narrative describing the proposed change(s). -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 EXHIBIT B EXHIBIT C EXHIBIT D EXHIBIT E EXHIBIT F EXHIBIT G EXHIBIT H EXHIBIT I EXHIBIT J EXHIBIT K EXHIBIT L EXHIBIT M EXHIBIT N EXHIBIT 0 EXHIBIT P EXHIBIT Q EXHIBIT R EXHIBIT S Rule 1.6.2(1)(b) Rule 6.5 Legal Description Index Map Pre -Mining and Mining Plan Map(s) of Affected Lands Mining Plan Reclamation Plan Reclamation Plan Map Water Information Wildlife Information Soils Information Vegetation Information Climate Information Reclamation Costs Other Permits and Licenses Source of Legal Right -To -Enter Owners of Record of Affected Land (Surface Area) and Owners of Substance to be Mined Municipalities Within Two Miles Proof of Mailing of Notices to County Commissioners and Conservation District Proof of Filing with County Clerk or Recorder Permanent Man -Made Structures ADDENDUM 1 - Notice Requirements (sample enclosed) 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. 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. 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. 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. 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 34-32.5-115(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.RS. Signed and dated this day of If Corporation Attest (Seal) Applicant/Operator or Company Name Signed: Signed: Corporate Secretary or Equivalent Title: Town/City/County Clerk State of ) ) ss. County of ) The foregoing instrument was acknowledged before me this day of , by as of Notary Public My Commission expires: 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 proposed mining operation. The following is a sample of the Notice required for Rule 1.6.2(1)(b) that you may wish to use. NOTICE This site is the location of a proposed construction materials operation. (Name of the Applicant/Operator) Asphalt Specialties whose address and phone number is (Address and Phone Number of the Applicant/Operator) has applied for a Reclamation Permit with the Colorado Mined Land Reclamation Board. Anyone wishing to comment on the application may view the application at the (County Name) Weld County Clerk and Recorder's Office, (Clerk and Recorder's Office Address) , and should send comments prior to the end of the public comment period to the Division of Reclamation, Mining, and Safety, 1313 Sherman St, Room 215, Denver, Colorado 80203. Certification: I, , hereby certify that I posted a sign containing the above notice for the proposed permit area known as the (Name of Operation) , on (Date Posted) SIGNATURE DATE NOTICE OF FILING APPLICATION FOR COLORADO MINED LAND RECLAMATION PERMIT FOR REGULAR (112) CONSTRUCTION MATERIALS EXTRACTION OPERATION NOTICE TO THE BOARD OF COUNTY COMMISSIONERS Weld COUNTY Asphalt specialties Co., Inc. (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 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 DISTRICT Asphalt specialties Co., Inc. (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 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. AN EXAMPLE PUBLIC NOTICE WHICH MEETS THE REQUIREMENTS OF THE STATUTES IS SHOWN BELOW. THE BLANKS WHICH REQUIRE DATES WILL NEED TO BE FILLED IN ACCORDING TO THE FOLLOWING INSTRUCTIONS. PLEASE READ CAREFULLY. PUBLICATION INSTRUCTIONS: Date of commencement and date of completion should represent the dates which you feel most accurately describe the life of the operation. For all Regular (112) types of operations, this notice must be published once a week for four (4) consecutive weeks, starting within ten (10) days of the date the application is considered to be submitted to the Division. The final date for receiving comments is the 20th day after the fourth publication or the next regular business day. All notices must be published in a newspaper of general circulation in the locality of the proposed mining operation and mailed to the landowners as set forth in the Colorado Mined Land Reclamation Rules and Regulations. Since the date for consideration of your application may change, DO NOT include it in this notice. Fora complete discussion of the notice procedures and objections, please refer to C.R.S. 34-32.5-112(10), 114 and 115. ***************************************************************************************************** ***** PUBLIC NOTICE (Operator Name) : (Address and Phone Number) has filed an application for a Regular (112) Construction Materials Operation Reclamation Permit with the Colorado Mined Land Reclamation Board under provisions of the Colorado Land Reclamation Act for the Extraction of Construction Materials. The proposed mine is known as the (Name of the Mine) Marcovich Mining Resource , and is located at or near Section 7 , Township 1 , Range 66 Prime Meridian. The proposed date of commencement is , and the proposed date of completion is . The proposed future use of the land is (Future Landuse) . Additional information and tentative decision date may be obtained from the Division of Reclamation, Mining, and Safety, 1313 Sherman Street, Room 215, Denver, Colorado 80203, (303) 866-3567, or at the (County Name) Weld County Clerk and Recorder's office: (Clerk and Recorder's Address) , or the above -named applicant. Comments must be in writing and must be received by the Division of Reclamation, Mining, and Safety by 4:00 p.m. on (Final Date for Comments) Please note that under the provisions of C.R.S. 34-32.5-101 et seq. Comments related to noise, truck traffic, hours of operation, visual impacts, effects on property values and other social or economic concerns are issues not subject to this Office's jurisdiction. These subjects, and similar ones, are typically addressed by your local governments, rather than the Division of Reclamation, Mining, and Safety or the Mined Land Reclamation Board. M \min\share \vsforms\07-07-01 vsforms\Construction 112.doc 07/24/2007) An example Structure Agreement which meets the requirements of the Statutes is shown below. ************************************************************************************* Structure Agreement This letter has been provided to you as the owner of a structure on or within two hundred (200) feet of a proposed mine site. The State of Colorado, Division of Reclamation, Mining and Safety ("Division") requires that where a mining operation will adversely affect the stability of any significant, valuable and permanent man-made structure located within two hundred (200) feet of the affected land, the Applicant shall either: a) Provide a notarized agreement between the Applicant and the Person(s) having an interest in the structure, that the Applicant is to provide compensation for any damage to the structure; or b) Where such an agreement cannot be reached, the Applicant shall provide an appropriate engineering evaluation that demonstrates that such structure shall not be damaged by activities occurring at the mining operation; or c) Where such structure is a utility, the Applicant may supply a notarized letter, on utility letterhead, from the owner(s) of the utility that the mining and reclamation activities, as proposed, will have "no negative effect" on their utility. ( Construction Materials Rule 6.3.12 and Rule 6.4.19 & Hard Rock/Metal Mining Rule 6.3.12 and Rule 6.4.20) The Colorado Mined Land Reclamation Board ("Board') has determined that this form, if properly executed, represents an agreement that complies with Construction Materials Rule 6.3.12(a), Rule 6.4.19(a), and C.R.S. § 34-32.5-115(4)(e) and with Hard Rock/Metal Mining Rule 6.3.12(a), Rule 6.4.20(a), and C.R.S. § 34-32-115(4)(d). This form is for the sole purpose of ensuring compliance with the Rules and Regulations and shall not make the Board or Division a necessary party to any private civil lawsuit to enforce the terms of the agreement or create any enforcement obligations in the Board or the Division. The following structures are located on or within 200 feet of the proposed affected area: 1 2. 3. 4. 5. (Please list additional structures on a separate page) CERTIFICATION The Applicant, (print applicant/company name), by (print representative's name), as President (print representative's title), does hereby certify that (structure owner) shall be compensated for any damage from the proposed mining operation to the above listed structure(s) located on or within 200 feet of the proposed affected area described within Exhibit A, of the Reclamation Permit Application for Marcovich Mining Resource File Number M - (operation name), This form has been approved by the Colorado Mined Land Reclamation Board pursuant to its authority under the Colorado Land Reclamation Act for the Extraction of Construction Materials and the Colorado Mined Land Reclamation Act for Hard Rock, Metal, and Designated Mining Operations. Any alteration or modification to this form shall result in voiding this form. NOTARY FOR PERMIT APPLICANT ACKNOWLEGED BY: Applicant Representative Name Date Title STATE OF COUNTY OF ) ss. The foregoing was acknowledged before me this day of , 20 , by as of Notary Public My Commission Expires: NOTARY FOR STRUCTURE OWNER ACKNOWLEGED BY: Structure Owner Date STATE OF COUNTY OF ) ss. ) Name Title The foregoing was acknowledged before me this day of , 20 , by as of Notary Public My Commission Expires: Hello