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Home My WebLink About20083815.tiff CIVIL RESURCES, LLC ENGINEERS & PLANNERS Weld County plhn^Ing Department urri ,E May 21, 2008 , k1 r.9 Board of County Commissioners VIA:Certified Mail 915 Tenth Street P.O. Box 758 Greeley CO 80632 RE: Amendment to MLRB Regular(112)Operation Reclamation Permit#M-1997.058 Application Hall-Irwin's Baseline Resource Dear Board: On behalf of Hall-Irwin Corporation we are requesting an amendment to the existing Baseline Resource MLRB permit to change the reclamation of Phase 4 from a pond to a lined water storage reservoir. Phase 4 is located northeast of intersection of Weld County Road 2 and Weld County Road 23.5. As required by the DRMS regulations,we have enclosed the following information for your review: • Notice of Filing Application foam« >> • Amendment Application ` • Exhibit i3 Index Map • Exhibit C Mining Plan Map • Exhibit F Reclamation Plan Map If you have any questions,please feel free fatintact me at 303-833-1416,ext.203. Sincere) , CIVIL SOURCE , LC ai44 Danna M.Ortiz Planner J:IHalllrwin\Baseline\Kirby AmendmentWork Products\DRMS AmendmenttSubmittal\Notices\NOTICE to County Cmmsr cover letter Kirby.doc �« v 2.O3B 34315 (,1? PLICIry 323 FIFTH STREET • P.O. Box 6BO • FREDERICK, CO 80530 • PHONE (303) 833-1416 • Fax (303) 833-2850 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 Hall-Irwin Corporation (the "Applicant/Operator") has applied for an Amendment to MLRB Regular (112) Operation Reclamation Permit #M-1997-058 for the Baseline Resource 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 Weld County Clerk to the Board of County Commissioners. The applicant/operator proposes to reclaim the affected land to water storage 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. STATE CAF COLORADO • DIVISION OF RECLAMATION,MINING AND SAFETY Dartment of Natural Resources 1313 Sherman St.,Room 215 Denver,Colorado 80203 COLORADO DIVISION O F Phone:(303)866-3567 CONSTRUCTION MATERIALS RECLAMATION FAX:(303)832-8106 M I N I N G REGULAR(112)OPERATION —&— RECLAMATION PERMIT APPLICATION FORM SAFETY sill Ritter,Jr. Governor CHECK ONE: There is a File Number Already Assigned to this Operation Harris D.Sherman Executive Director Permit# M -1997_ 058__ (Please reference the file number currently assigned to this operafiid w.cattany New Application(Rule 1.4.5) X Amendment Application(Rule 1.10) Division Director Natural Resource Trustee Conversion Application(Rule 1.11) 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 I,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): Hall-Irwin Corporation 1.1 Type of organization(corporation,partnership,etc.): Corporation 2. Operation name(pit,mine or site name): Baseline Resources 3. Permitted acreage(new or existing sitel: 209.6 permitted acres 3.1 Change in acreage(+) 0 acres 3.2 Total acreage in Permit area 209.6 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) $696.00 conversion fee 5. Primary commoditie(s)to be mined: gravel sand 5.1 Incidental conunaditie(s)to be mined: 1. - lbs/Tons/yr 2. / lbs/Tons/vr 3. / lbs/Tons/yr 4. / ll?s/Tons/yr 5. / lbs/"TonsLyr 5.2 Anticipated end use of primary commoditie(s)to be mined: Construction materials 5.3 Anticipated end use of incidental commoditie(s)to be mined: Office of Office of Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines • -2- r 6. Name of owner of subsurface rights of affected land: HIBE If 2 or more owners,"refer to Exhibit O". 7. Name of owner of surface of affected land: HIBE 8. Type of mining operation: X Surface Underground 9. Location Information: The center of the area where the majority of mining will occur: COUNTY: Weld PRINCIPAL MERIDIAN(check one): X 6th(Colorado) 10th(New Mexico) Ute SECTION(write number): S 36 TOWNSHIP(write number and check direction): T 1 X North South RANGE(write number and check direction): R 67 East X West QUARTER SECTION(check one): NE NW X SE SW QUARTER/QUARTER SECTION(check one): NE NW SE SW GENERAL DESCRIPTION:(the number of miles and direction from the nearest town and the approximate elevation): Northeast of intersection of Weld County Road 2 and Weld County Road 23.5, .75 miles from Highway 85,approximately 1.5 miles northwest of Brighton. The approximate elevation 4,945 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 40 min 00 Sec 29 , 84 (2 decimal places) Longitude(W): deg 104 tin 48 sec 56 , 90 (2 decimal places) OR Example: (N) 39.73691° (W) -104.98449° Latitude(N) (5 decimal places) Longitude(W) _ (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) Zone Easting Northing • -3- 11. Correspondence Information: APPLICANT/OPERATOR (name,address,and phone of name to be used on permit) Contact's Name: Jim McFarland - Title: Division Manager Company Name: Hall-Irwin Corporation Street/P.O.Box: 301 Centennial Drive P.O.Box: City: Milliken State: CO Zip Code: 80543 Telephone Number: ( 303 )_ 654-1684 x7277 Fax Number: ( 970 1_ 352-6284 PERMITTING CONTACT (if different from applicant/operator above) Contact's Name: Danna Ortiz Title: Principal Planner Company Name: Civil Resources Street/P.O.Box: 323 5th St. P.O.Box: 680 City: Frederick State: CO Zip Code: Telephone Number: ( 303 )_ 833-1416 x203 Fax Number: ( 303 )- 833-2850 INSPECTION CONTACT Contact's Name: Jim McFarland Title: Division Manager Company Name: Hall-Irwin Corporation Street/P.O.Box: 301 Centennial Drive P.O.Box: City: Milliken State: CO Zip Code: 80543 Telephone Number: ( 303 )_ 654-1684 x7277 Fax Number: ( 970 )_ 352-6284 CC: STATE OR.FEDERAL LANDOWNER(if any) Agency: __^ Street: City: State: _._..Zip Code: Telephone Number: ( )- CC: STATE OR FEDERAL LANDOWNER(if any) Agency: Street: City: State: Zip Code: Telephone Number: ( _...___j- -4- 12. Primary future(Post-minine)land use(check one): Cropland(CR) Pastureland(PL) General Agriculture(GA) Rangeland(RL) Forestry(FR) Wildlife Habitat(WL) Residential(RS) Recreation(RC) Industrial/Commercial(IC) X Developed Water Resources(WR) Solid Waste Disposal(WD) 13. Primary present land use(check one): Cropland(CR) Pastureland(PL) General Agriculture(GA) X Rangeland(RL) Forestry(FR) Wildlife Habitat(WL) Residential(RS) Recreation(RC) Industrial/Commercial(IC) Developed Water Resources(WR) 14. Method of Mining: Briefly explain mining method(e.g.truck/shovel): Material will be mined with excavation equipment, placed in haul trucks or on conveyors,transported to processing equipment on site. 15. On Site Processing: X Crushing/Screening 13.1 Briefly explain mining method(e.g.truck/shovel): Crushing,screening,washing of stockpiled sand and gravel, production of concrete and asphalt,milling to recycle concrete and asphalt. List any designated chemicals or acid-producing materials to be used or stored within permit area: None anticipated 16. Description of Amendment or Conversion: If you are amending or converting an existing operation,provide a brief narrative describing the proposed change(s). The purpose of this amendment is to add a slurry wall to the HIBE property(Phase 4),to change the reclamation of the plan for this phase to developed water resources,and to account for processing the materials from the adjacent Parker-Dersham operation. -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 I.6.2(1)(b): EXHIBIT A Legal Description EXHIBIT B Index Map EXHIBIT C Pre-Mining and Mining Plan Map(s)of Affected Lands EXHIBIT D Mining Plan EXHIBIT E Reclamation Plan EXHIBIT F Reclamation Plan Map EXHIBIT G Water Information EXHIBIT II Wildlife Information EXHIBIT I Soils Information EXHIBIT J Vegetation Information EXHIBIT K Climate Information EXHIBIT L Reclamation Costs EXHIBIT M Other Permits and Licenses EXHIBIT N Source of Legal Right-To-Enter EXHIBIT O Owners of Record of Affected Land(Surface Area)and Owners of Substance to be Mined EXHIBIT P Municipalities Within Two Miles EXHIBIT Q Proof of Mailing of Notices to County Commissioners and Conservation District EXHIBIT R Proof of Filing with County Clerk or Recorder EXHIBIT S Permanent Man-Made Structures Rule 1.6.2(1)(b) ADDENDUM 1 -Notice Requirements(sample enclosed) Rule 6.5 Geotechnical Stability Exhibit(any required sections) The instructions for preparing Exhibits A-S,Addendum 1,and Geotechnical Stability Exhibit are specified under Rule 6.4 and 6.5 and Rule 1.6.2(1)(h)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 Ini .__ nderstand 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 pea urit 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/partnershipc*erators: 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 i.s 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(4X1),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 k S i-V, day of M e.� 2 O v i . HALL-IRWIN CORPORATION If Corporation Attest(Seal) Applicant/Operator or Compa y Name Signedd Signed: e9,147, Corporate Secretary or Equivalent Title: Town/City/County Clerk State of Co\c3 CAe O )ss. County of l $2 The foregoing instrument was acknowledged before me this k5+ day of r'V'. by c 4t as —_. C Q '0 _ —of +-k►►"T�� :r, CO if ore:4;a n As r .. Notary Public rF a4 My Commission expires: ` - tat o 0¢ SIGNATURES MUST I3I,IN BLUE INK 5. I\ -- — 30 2f ]I _ _,, \ ( 4940 2,5 —�.- `, r ; \. - .y yT r •C , o, `� {{j m ` : t, G P+ts ti X y ;r its j 6i - �J PROJ E jj OCATIO • �- . ' $ 1) ».�� = -' — 1 j _ 1j/- ,■ r. fir \, t --I 4 r t I U ! ♦• ! i• a ft r I jam, , r 4 4ti..y - la ' _ BR • we 2 Di'ASEZl _, ,, ss9. _ - it s _.•1„447 it.i j urea • .J f •" l: ', • �d t s c Park O Q 1 , 1 I' ji1 ' Cr) 1 " z ' 111 r .fit' '' t. :PEAK � l , �_ 0 I ri( ;; I HTO , r I mg Is ;, Park �� SH 79t �0 T' A v 4 well ••.;, • 9R 4962 -' '1" : ! 'EMI s E ? / lsocb • I r • 4964 ,i / W � sip 4-� .�..� „elf Y- / .I, ..ate / ,,t-'. '- . r • v / r 51 ......j / .. C4. 12 ✓r'-' i 0 1000 24000 HALL-IRWIN CORPORATION NORTH IlIMMII CIVILRESURCESLLC Baseline Resource ( IN FEET ) DATE: FIGURE: 05/2008 1 EXHIBIT B: INDEX MAP EXHIBIT C — PRE-MINING AND MINING PLAN MAP The Mining Plan has been revised to show a slurry wall around Phase 4, which is also known as the HIBE property. This phase will be mined at a 3:1 slope. AMENDMENT TO BASELINE PERMIT#M-1997-058 R A. BASELINE p1 ROBERT A.PARKER o EDGE OF + PHASE 3 RESOURCE EDGE OF PAULA& AREA REED MINING CARL F EIBERGCR • RUTH E u STRUCK '^ ___ • _ —_— — _- _1.._I TANK _—Y X x X �..�X Q •,X- ._ ._._-.. _.___--_ __ ..... _.___ .. XrfE�,is>fw1F■CM■ EXISTING f I ., I * �0 "°" FLOODPLAIN INFORMATION: -i MAINTAIN 37.5'SETBACK ;0WATER '" ORMATION: o w w i Po ( FROM GAS PIPELINE TO y �e ,� OISCHARGE l 'PEST THIS PROPERTY LIES ENTIRELY WITHIN ZONE A.AREA OF 100-YEAR FLOOD; - - zl `5 EDGE OF MINING FOR '� PUMP i--� BASE FLOOD ELEVATIONS AND FLOOD HAZARD FACTORSNOT DETERMINED ' ■ STEP 1 ;Q (IN recr 1 ACCORDING TO FIRM FLOOD INSURANCE RATE MAP PANEL No.0B02660996 C. ' • `� BACKFILL TO CREATE ■ SEPTEMBER 26,1964. 75'SETBACK FROM HAUL ROAD ■ --�.-. \\'. \`� GAS PIPELINE TO EDGE \ OF MINING/RECLAIMED CONVEYOR O • NOTES: I SLOPE LEGEND 1 i' \s ENGINEERING STABILITY ANALYSIS HAS BEEN 0 1. AN 0 11 IPERFORMED TO ENSURE ANY s F0,1/GAS o o_0 0 0 0 0 0 0 0 0 0 0 0 0_s_ OCCURRING WITHIN 200 FEET OF A MAN-MADE STRUCTURE THAT IS NOT TO BE DEMOLISHED AND IS I '; - NOT OWNED BY THE APPLICANT OPERATOR HAS ADEQUATE SETBACK DISTANCE. \1 -'-1ACCESS ..__ ... __._ .._.._-._ I om EXISTING PERMIT AREA APPLICANT/ Q 'ALONG 2. THE MINING OPERATION WILL USE DRY MINING TECHNIQUES AND EXCAVATE MATERIAL BY II PHASE 4 i BACKHOE,BULLDOZER,AND SIMILAR EQUIPMENT. INE h LINE) ! ----- SECTION LINE 34.a ACRES+/- 3. TYPICAL MINE FACE WILL BE ANALYSIS. (V),HOWEVER THIS MAYBE MODIFIED BASED ON THE 3(H):1(V) Q MONITORING ,1 TYP3(H II WELL PHASE 2 • SECTION CORNER RESULTS OF THE STABILITY ANALYSIS. `. 31 ACRES+/- 4. CONVEYOR/INTERNAL HAUL ROAD WILL EXTEND INTO EACH PHASE AS MINING PROGRESSES. -. __,_.. EXISTING FENCE 5. TEMPORARY TOPSOIL STOCKPILES WILL BE PLACED ALONG THE PERIMETER OF THE MINE LIMIT. l -- STOCKPILES LOCATED WITHIN THE 100-YEAR FLOODPLAIN WILL BE ALIGNED PARALLEL TO THE ( W 0 ' -. EXISTING TREES FLOOD-FLOW DIRECTION OF THE SOUTH PLATTE RIVER AND WILL HAVE A MAXIMUM HEIGHT OF 30' APPROXIMATE - A MAXIMUM BASE WIDTH OF 100',A MAXIMUM SLOPE OF 3H:1V AND A MINIMUM OF 100' BETWEEN LOCATION OF ,0 j _ EXISTING GAS LINE PILES. ii SLURRY WALL b---, 6. STOCKPILES THAT ARE UNDISTURBED FOR MORE THAN 45 DAYS WILL BE SEEDED WITH THE REFER TO STABILITY CONVEYOR AND - - EXISTING TELEPHONE LINE NATIVE GRASS SEED MIX SHOWN ON THIS PLAN AT A RATE OF 9.6 PLS PER ACRE WEATHER ANALYSIS FOR HAUL ROAD ALONG . -. -- --:— EXISTING ELECTRIC LINE PERMITTING AND MONITORED FOR WEED CONTROL. SETBACKS(TYP.) a PROPERTY LINE 7, STOCKPILED TOPSOIL WILL BE SEGREGATED FROM OTHER MATERIAL,STOCKPILED AROUND 1 - EXISTING TELEPHONE PEDESTAL THE PERIMETER OF THE MINING AREA AND SEEDED, Q - - - B. THE OPERATION WILL INCLUDE CONCURRENT MINING AND RECLAMATION, X 1 ,E�.^ FO - EXISTING WELL FUTURE L..�.-3 T1 9. A MINIMUM OF TEN(10)FEET OF CLEARANCE FROM ANY EXISTING POWERLTNE OR E-u - - EXISTING POWER POLE POWERLINE SHALL BE MAINTAINED AT ALL TIMES AS OUTLINED BY STATE STATUTES. _y__-_ - ----in a 10.UTILITIES SHOWN ON THIS PLAN WERE PROVIDED BY OTHERS, FOR SAFETY THE OPERATOR 1- r CONVEYOR SHOULD LOCATE UTILITIES PRIOR TO SLURRY WALL CONSTRUCTION OR MINING ACTIVITY. :RANDS L .0 OI 11.PRIOR TO CONSTRUCTION ALL UTILITY,GAS WELL,OIL WELL AND WATER WELL LOCATIONS I yKIR OODS I ' 0 0 o HAUL ROAD MUST BE VERIFIED. I • ■ 12.SLURRY WALL SHOWN HEREIN IS GENERAL LOCATION ONLY. SLURRY WALL DESIGN PLANS AND I EDGE OF DISTURBED AREA SPECIFICATIONS ARE INCLUDED WITH THIS APPLICATION. ..__,,.-.,. ,,.m I„r //"°, - - .4 s'°' I"" '" SETTLING PONDS • ' 13. ALL STRUCTURES WITHIN THE MINING BOUNDARY WILL BE REMOVED. 60 / �m FOR WASH WATER - EDGE OF MINED AREA 14.THIS AMENDMENT APPLIES TO PHASE 4 OF THE BASELINE RESOURCE OPERATION. A SLURRY WALL 60 r WILL BE EXTENDED AROUND THE MINING AREA THAT WILL TIE INTO THE SLURRY WALL ON THE I I' SLURRY WALL ■ --. DERSHAM PARCEL TO THE SOUTH AND THE EXISTING SLURRY WALL TO THE EAST, PHASE 4 WILL BE o ':1 ■ I '1 PROCESSING ----- --- -- UNCHANGED MINE PHASE LIMITS MINED AS A SINGLE CELL. UNCHANGED PHASE LIMITS FOR MINING ARE SHOWN IN A DASHED e I AREA LINETYPE. M I ' • _ _ EXISTING SLURRY WALL N I¢ I$ II PARKER—DERSHAM ■ - >— '., CERTIFICATION NOTE: 'U I M-200E-003 STOCKPILES Lc ES A PHASE 3 2C THIS MAP WAS PREPARED BY CIVIL RESOURCES,LLC IN COOPERATION WITH I-. PHASE 6 i HALLJRWIN CORPORATION.THE EXACT CONFIGURATION OF THE MINING FiHAS�ENgORARY EXISTING R PODS AND RECLAIMED PONDS MAY CHANGE TO RESPOND TO FIELD CONDITIONS.HALL-IRW'IN WILL KEEP THEDNSON OF RECLAMATION AND < ■ • .._ 16 ACRE STl GROUND I I MINE SAFETY INFOWAED OF ANY CHANGES THROUGH ANNUAL REPORTS AND U ■ STOCKPILES X25•TYP FILE TECHNICAL REVISIONS AND AMENDED APPLICATIONS AS NECESSARY I U -- __- 24 ACRES+/-I �,- THROUGHOUT THE LIFE OF THE MINE. CJ I E -.... - MINE SLOPE 7 MIN I■ PEVCI,INC I 3H,IV � SAND&GRAVEL :.NT ASPHALT SAND &GRAVEL - SLURRY WALL 1 ■ m_" PLANT ■ I _ „ °ANNA ORTIZ 'w.," _ .. - __. ___. - -BEDROCK :I CIVIL RESOURCES,LLC • TYPICAL- MINING CROSS SECTION N _ _ ■ AND GR Ob SE _ ._ — _.. _ . _ _._..�"" I I SCALE HOu - NOT TO SCALE .L �' OB STOCKPILE DATE I g OFFICE I�LANOSCAPE WITH TREES �'• • 'i,.m _ CONCRETE • AREA - TOTAL PROCE ING CONCRETE ■ II SAKAIA 1 a f i IS _ __ ■ �i._�•FAP.MS 11 x SARAH J& )1a \ I =-ae.::--_ I ` JAMES E. MARCUS ARC CN E is I 11,4 KELLIE tt i '- j it_ -� I e ACCESS I EAST 168TH STREET ) BASELINE ROAD) 11 $ j ADAMS COUNTY - - 1 I . I E S HALL-IRWIN CORPORATION B. REVISIONS AMENDMENT TO MLRB 112 PERMIT NO.M-1997-058 NO. DESCRIPTION DATE By MINING PLAN 3236MStreet CIVIL RES'TURCES,LLC P.D.Box 680 Fretlerick,CO 80530 3113 633 1416(p)303 833 2850(N DESIGNED BY: SKF JOB NO. DWG: DATE: APRIL 2008Kg6y Amentlment 090808.tlwq PP DRAWN 6Y: SKF SHED SY SCALE: AS NOTED 83055.07 OIECKED BY: I EXHIBIT F — RECLAMATION PLAN MAP The Reclamation Plan Map has been revised to show a slurry wall around Phase 4. We have also included a map that shows the ultimate configuration of the water storage reservoir,which will include the Dersham property on Hall-Irwin's Parker-Dersham Resource(permit#M-2006-003). AMENDMENT TO BASELINE PERMIT#M-1997-058 BASELINE g ROBERT L& RESOURCE VALERIE A.PARKERLi I - - ggF s CARL F.MERGER ENO OF MINE THROUGH EXISTING - SLURRY WALL TO CREATE PAUL A.t . RUIN Ee. A SINGE WATER STORAGE STRUCK - - - __ ___ E - _-X X-- _ ANK - X X X TINE DRIVE I ,, / NOTES: I) sg ' s qq�" E Ti To 1, DURING SITE RECLAMATION,TOPSOIL SHALL BE SPREAD IN LIFTS NOT TO EXCEED 4 INCHES AND WORKED -.= 9 _ � f s I I E STNS NOIonRTM no� ' -INTO THE SLOPES TO ENSURE GOOD ADHESION AND MINIMIZE SOIL CREEP. `� 1 DYE ( (IN FEET, 2. SOIL TEST MAY TAKE PLACE PRIOR TO RECLAMATION TO DETERMINE PROPER SOIL AMENDMENTS. ''ST''/:''' - �, *� / 3. LOCATION OF LANDSCAPE MATERIAL MAY BE ADJUSTED TO BEST FIT SITE CONDITIONS, FINAL LOCATIONS TO I _ $ '$I BE DETERMINED IN THE FIELD BY OWNER'S REPRESENTATIVE IN CONJUNCTION WITH COUNTY STAFF. I4. ALL LANDSCAPING SHALL MEET THE UTILITY CLEARANCE REQUIREMENTS. IL/GAS �. ''a ' r LEGEND: WATER STORAGE WELL• 1 ea®� EXISTING PERMIT AREA S. THE CONTRACTOR SHALL CALL FOR ALL UTILITY LOCATES AND FIELD VERIFY THE LOCATION OF ALL RESERVOIR AREA= UNDERGROUND UTILITIES. 34.4 ACRES+/- t ON KIR87 PARCEL) i - - 6. ALL LANDSCAPE SHALL BE INSTALLED CONSISTENT WITH XERISCAPE STANDARDS FOR INSTALLATION,SOIL i / SECTION LINE PREPARATION AND IRRIGATION, SECTION CORNER 7. ALL DISTURBED AREAS SHALL BE RESEEDED WITH THE SPECIFIED SEED MIX.ALL SEEDED AREAS SHALL-BE j RESEEDED AS NEEDED UNTIL WELL ESTABLISHED. SEEDING SHALL OCCUR BETWEEN NOVEMBER 1ST THROUGH - EXISTING FENCE APRIL 15TH IF POSSIBLE. ALL SEEDING SHOULD TAKE PLACE ON UNFROZEN SOIL - EXISTING TREES 8. SEEDING SHALL NOT BE PERMITTED WHEN WIND VELOCITY IS SUCH AS TO PREVENT UNIFORM SEED ) EXISTING GAS LINE DISTRIBUTION. NO APPLICATION SHALL BE UNDERTAKEN DURING INCLEMENT WEATHER. -C_-. 3:1 SLOPE / - - - MSEEDED ITH NATIVE S SEED X SHALL BE MULCHED MAX. / -Y-- EXISTING TELEPHONE LINE HAY.9. AREAS LCH SHALL BE APPLIED AT ASRATE OF 4,000 POUNDS PER ACRE I MULCH TH ASHALL BE CRIMPED INTO THEN WEED FREE STRAW OR VE I �' - "' + - EXISTING ELECTRIC LINE SOIL TO ANCHOR IT. CRIMPING SHALL TAKE PLACE CROSS SLOPE WHERE POSSIBLE, y u2:., YI TIE INTO / EXISTING EXISTING J /3 v rti f.."' TIE INTO - -- $ '1 EXISTING TELEPHONE PEDESTAL 10. GRA55 SEED SHALL 8E DRILLEp MECHANICALLY WITH A NATIVE GRA55 DRILL EQUIPPED WITH AN AGITATOR DRIVE �I L �,. �^ EXISTING WELL - AND PRESS WHEELS. THE DRILL SHALL ALSO HAVE DEPTH BANDS ON SLOPES LESS THAN 3:1,DRILL IN A MANNER•r _�� I y�,J.f'( - THAT AFTER SURFACE IRAKED AND ROLLED,SEED SHALL HAVE TO / OF COVER, '4 _ r, "� I( ' 5 LED 1/4" 1 2" 0 EXISTING POWER POLE�k j 7/', RANDY L F I� < - 11. BROADCAST SEEDING WILL BE PERMITTED ONLY ON SMALL AREAS NOT ACCESSIBLE TO MACHINE METHODS. Y RINNPASIEX I L VIIIi�s BA - FOR BROADCAST SEEDING,SEEDING RATES SHALL BE DOUBLED. INSTALL HAY MULCH IMMEDIATELY AFTER �'� i I I -S ■ ---- TOP OF POND ��IIII p CI § SEEDING. ♦_ fA Y• -4_�9yJ.,,g ,,s„ D_,- �,� PROPOSED CONTOURS may -T• ./ °1 - 12. SEED SHALL BE UNIFORMLY SOWN,ONE HALF THE SEED IN ONE DIRECTION AND ONE HALF THE SEED AT ROW B (;I^ - a 10 g°• ..9, SLURRY WALL RIGHT ANGLES TO THE FIRST SOWING,WHERE POSSIBLE. WHERE TOO NARROW TO ACCOMPLISH TWO DIRECTIONAL SOWING,SEED ONE HALF THE SEED FIRST SOWING IN ONE DIRECTION AND ONE HALF THE SEED,IN Nr SETBACK '.6"' -- -- UNCHANGED MINE PHASE LIMITS THE SAME DIRECTION,WITH THE DRILL OFFSET MID-ROW OF FIRST SOWING. (N i IR a°x T. `' I' EXISTING SLURRY WALL n m i - f 13. WATER SHALL BE APPLIED TO THE WORK AREA OR OTHER APPROPRIATE MEASURES SHALL BE TAKEN AS N I I. \ NECESSARY TO HELP CONTROL SOIL EROSION DURING WINDY CONDITIONS. FS 0 II.F S ,e, 14. A MINIMUM OF 10 INCHES OF TOPSOIL WILL BE SPREAD OVER ALL DISTURBED AREAS TO BE RESEEDED TO MATCH SURROUNDING FINISH GRADE. _ sus rn% -I- ? EC a IN tr)-I 1 2C. 15. MOWING WILL BE PERFORMED FOLLOWING SEEDING TO HELP ESTABLISH NATIVE GRASSES AND CONTROL • Z G D TEMPORARY WEED INFESTATION. =O 'i n.G D T i--j OS/TS , STOCKPILES 16. TREES LISTED IN PLANT SCHEDULE SHALL BE PLANTED WITH LIKE SPECIES IN THE GROUPINGS SHOWN ON 0) L' O LT 70 ,y t...-=. START OF MHE THROUGH ExIBTING THE PLAN, PLANTS SHALL BE PLANTED IN THE QUANTITIES SHOWN IN THE PLANT SCHEDULE. TTI �`T SLURRY WALL TO CREATE 0 e A A SINGE WA-ER STORAGE J g4,. 1 - RESERVOIR 17. ALL TREES SHALL BE SETBACK FROM THE SLURRY WALL A MINIMUM OF 30', 1 Y 11 ( -7 11 - R- EXISTING GROUND is s • RESERVOIR - x5,rn � . I OX/TN STOCKPILE SIDESLOPE N �rr S.° -�j' WITH TREES 3H:1V SAND&GRAVEL O B III r,r✓ ?IiTTAL PROCEre I` / \ SAND&GRAVEL .SLURRY WALL A�t�Lr!S 1r Ir 41414 14 wIs w«e"S SAKATA s IaI y .4;a242 I` ,.. wr.�. �m- ' . :�f: , ::.'..a ..'.� .. -�e-.� _: a.:.. . �a:;r- .;,. ._. ~ - F 1\ Ir Jam, SARAH 2.k S }{ .77 .,ir= `.... GEES C. J_Y YAALUS CARTE 8: " _ LANFORD NELLIE PQII2R1• A it ___ --_ it RESERVOIR DETAIL A NOT TO SCALE P, I EAST 168TH STREET 1 /BASELINE ROAD) - I Ei NOTE: o ADAMS COUNTY o THIS MAP WAS PREPARED BY CIVIL RESOURCES,LLC IN COOPERATION WITH Z E HALL-IRWIN CORPORATION.THE EXACT CONFlGURATION OF THE MINING 0 - - PODSAND RECLAIMED PONDS MAY CHANGE TO RESPOND TO FIELDKAI CONDITIONS.HALL-IRWIN WILL KEEP THE DIVISION OF RECLAMATION AND • MINE SAFETY INFORMED OF ANY CHANGES THROUGH ANNUAL REPORTS AND R FILE TECHNICAL REUNIONS AND AMENDED APPLICATIONS AS NECESSARY HALL-IRWIN CORPORATION 3 THROUGHOUT THE LIFE OF THE MINE. - REVISIONS AMENDMENT TO MLRB 112 PERMIT a 58 NO. DEBCRIPTIDN GATE Br RECLAMATION FLAN il DANNA ORTIZ 323 SItl Street CIVIL RESOURCES,LLC CIVIL R E S'T U R C E S,L L C P.O.Box 680 Frederick,Co 80530 303 833 1416(0)303 833 2850(D DESIGNED BY: SKF JOB NO. DWG: DATE: APRIL 2008 Kirby amendment 040808.dwg m DRAWN BY: SKF DATE - - SCALE: AS NOTED 43-00R2_155.83 SHEET: CHECKED BY: DO 1 CIVIL RES� URCES, LLC ENGINEERS & PLANNERS . r } May 23,2008 Clerk to the Board of Weld County Commissioners 915 Tenth Street, Rm 317 Greeley, CO 80632 (970)336-7204 RE: Amendment to MLRB Regular(112)Operation Reclamation Permit#M-1997.058 Application Hall-Irwin's Baseline Resource To Clerk to the Board: Enclosed please find a copy of the Amendment to the existing Baseline Resource MLRB permit application that was submitted to the Division of Reclamation,Mining and Safety(DRMS)on behalf of Hall-Irwin Corporation. The DRMS requires us to file.: °, py of the application with the County Clerk's Office so that it can be available for public viewing. Please sign below to indicate that you have received the above-mentioned application and fax this page back us immediately(3, 3)833 2850 Thank you Sincerely, Civil R urces, LLC ��1 Danna Ortiz Planner s _ ' Encl. Confirmation of Receipt: I have received the Amendment to the existing Baseline Resource MLRB permit application for Hall-Irwin's Baseline Resource and will put it on file for public viewing. 4_Ze, 0_5647418 erk to the Board ate a.. .4Y.. 323 FIFTH STREET • R❑. Box 680 • FREDERICK, CO 80530 • PHONE (303) 833-141 6 !..,�.ax,!",31) 833-2850 TABLE OF CONTENTS Regular 112 Permit Application Form Summary Table of Changes to Exhibits Exhibit C- Pre-Mining and Mining Plan Maps Exhibit D- Mining Plan Exhibit E- . Reclamation Plan Exhibit F- Reclamation Plan Map Exhibit L- Reclamation Cost Exhibit Q- Proof of Mailing of Notices to County Commissioners and Soil Conservation District Exhibit R- Proof of Filing with County Clerk and Recorder Exhibit S - Permanent Man-Made Structures AMENDMENT TO BASELINE PERMIT#M-1997-058 STATE OF COLORADO DIVISION OF RECLAMATION,MINING AND SAFETY Department of Natural Resources 1313 Sherman St.,Room 215 Denver,Colorado 80203 C O L D R.A D O DIVISION OF Phone:(303)866-3567 CONSTRUCTION MATERIALS RECLAMATION FAX:(303)832-8106 MINING REGULAR(112)OPERATION -&- RECLAMATION PERMIT APPLICATION FORM SAFETY Bill Ritter,Jr. Governor CHECK ONE: There is a File Number Already Assigned to this Operation Harris D.Sherman Executive Director Permit# M -1997_ 058_T (Please reference the file number currently assigned to this op eratigald w.cattany New Application(Rule 1.4.5) X Amendment Application(Rule 1.10) Division Director Natural Resource Trustee Conversion Application(Rule 1.11) 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 (I) 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): Hall-Irwin Corporation 1.1 Type of organization(corporation,partnership,etc.): Corporation 2. Operation name(pit,mine or site name): Baseline Resources 3. Permitted acreage(new or existing site): 209.6 permitted acres 3.1 Change in acreage(+) 0 acres 3.2 Total acreage in Permit area 209.6 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 _S2,229,00 amendment fee 4.5 Conversion.to 112 operation.(set by statute) $2,696.011 conversion fee 5. Primary commoditie(s)to be mined: gravel sand _ 5.1 Incidental commoditie(s)to be mined: 1. - lbs/Tonsivr 2. / lbs/ ons/yr 3. i Ibs/Tons/yt 4. ! lb5/Tonslyr 5.- / lbs/Tons/yr 5.2 Anticipated end use of primary commoditie(s)to be mined: Construction materials • 5.3 Anticipated end use of incidental commoditie(s)to be mined: Office of Office of Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines • -2- 6. Name of owner of subsurface rights of affected land: HIBE If 2 or more owners,"refer to Exhibit O". 7. Name of owner of surface of affected land: HIBE 8. Type of mining operation: X Surface Underground 9. Location Information: The center of the area where the majority of mining will occur: COUNTY: Weld PRINCIPAL MERIDIAN(check one): X 6th(Colorado) 10th(New Mexico) Ute SECTION(write number): S 36 TOWNSHIP(write number and check direction): T 1 X North South RANGE(write number and check direction): R 67 East X West QUARTER SECTION(check one): NE NW X SE SW QUARTER/QUARTER SECTION(check one): NE NW SE SW GENERAL DESCRIPTION:(the number of miles and direction from the nearest town and the approximate elevation): Northeast of intersection of Weld County Road 2 and Weld County Road 23.5, .75 miles from Highway 85,approximately 1.5 miles northwest of Brighton. The approximate elevation 4,945 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 40 min 00 sec 29 . 84 (2 decimal places) Longitude(W): deg 104 min 48 sec 56 . 90 (2 decimal places) OR Example: (N) 39.73691° (W) -104.98449° Latitude(N) .__. _(5 decimal places) Longitude(W) __...__ _ (5 decimal places) OR Universal Tranverse Mercator,(,[-TM) Example: 201336.3 E NAD27 Zone 13 4398351.2 N UTM Datum(specify NAD27,NAD83 or WGS 84) Zone Easting Northing -3- II. Correspondence Information: APPLICANT/OPERATOR (name,address,and phone of name to be used on permit) Contact's Name: Jim McFarland Title: Division Manager Company Name: Hal-Irwin Corporation Street/P.O.Box: 301 Centennial Drive P.O.Box: City: Milliken State: CO Zip Code: 80543 Telephone Number: ( 303 )_ 654-1684 x7277 Fax Number: ( 970 _ 352-6284 PERMITTING CONTACT (if different from applicant/operator above) Contacts Name: Danna Ortiz Title: Principal Planner Company Name: Civil Resources Street/P.O.Box: 323 5th St P.O.Box: 680 City: Frederick State: CO Zip Code: Telephone Number: ( 303 )_ 833-1416 x203 Fax Number; ( 303 )_ 833-2850 INSPECTION CONTACT Contact's Name: Jim McFarland Title: Division Manager Company Name: Hall-Irwin Corporation Street/P.O.Box: 301 Centennial Drive P.O.Box: City: Milliken State: CO Zip Code: 80543 Telephone Number: ( 303 )_ 654-1684 x7277 Fax Number: ( 970 )_ 352-6284 CC: STATE OR.FEDERAL LANDOWNER(if any) Agency Street: City: State: _-- Zip Code: Telephone Number: ( )- CC: STATE OR FEDERAL LANDOWNER(if any) Agency: ___---- Street: City: State: . Zip Code: Telephone Number: (_ ____. __1.- �—__ -4- 12. Primary future(Post-mining)land use(check one): Cropland(CR) Pastureland(PL) General Agriculture(GA) Rangeland(RL) Forestry(FR) Wildlife Habitat(WL) Residential(RS) Recreation(RC) — Industrial/Commercial(IC) X Developed Water Resources(WR) Solid Waste Disposal(WD) 13. Primary present land use(check one): _ Cropland(CR) Pastureland(PL) _ General Agriculture(GA) X Rangeland(RL) Forestry(FR) Wildlife Habitat(WL) Residential(RS) Reereation(RC) Industrial/Commercial(IC) Developed Water Resources(WR) 14. Method of Mining: Briefly explain mining method(e.g.truck/shovel): Material will be mined with excavation equipment, placed in haul trucks or on conveyors,transported to processing equipment on site. 15. On Site Processing: X Crushing/Screening 13.1 Briefly explain mining method(e.g.truck/shovel): Crushing,screening,washing of stockpiled sand and gravel, production of concrete and asphalt,milling to recycle concrete and asphalt. List any designated chemicals or acid-producing materials to be used or stored within permit area: _None anticipated 16. Description of Amendment or Conversion: If you are amending or converting an existing operation,provide a brief narrative describing the proposed change(s). The purpose of this amendment is to add a slurry wall to the HIBE property(Phase 4),to change the reclamation of the plan for this phase to developed water resources,and to account for processing the materials from the adjacent Parker-Dersham operation. -5- Mans 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 I.6.2(1)(b): EXHIBIT A Legal Description EXHIBIT B Index Map EXHIBIT C Pre-Mining and Mining Plan Map(s)of Affected Lands EXHIBIT D Mining Plan EXHIBIT E Reclamation Plan EXHIBIT F Reclamation Plan Map EXHIBIT G Water Information EXHIBIT H Wildlife Information EXHIBIT I Soils Information - EXHIBIT J Vegetation Information EXHIBIT K Climate Information EXHIBIT L Reclamation Costs EXHIBIT M Other Permits and Licenses EXHIBIT N Source of Legal Right-To-Enter EXHIBIT O Owners of Record of Affected Land(Surface Area)and Owners of Substance to be Mined EXHIBIT P Municipalities Within Two Miles EXHIBIT Q Proof of Mailing of Notices to County Commissioners and Conservation District EXHIBIT R Proof of Filing with County Clerk or Recorder EXHIBIT S Permanent Man-Made Structures Rule 1.6.2(1)(b) ADDENDUM I -Notice Requirements(sample enclosed) Rule 6.5 Geotechnical Stability Exhibit(any required sections) The instructions for preparing Exhibits A-S,Addendum 1,and Geotechnical Stability Exhibit are specified under Rule 6.4 and 6.5 and Rule L6.2(i)(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 n nderstand these obligations then please contact this Office for a full explanation. __iii,k__. I. 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- y,111 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 petmnit misrepresent important material facts; IA( 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 petmmmit, 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 ventureipartpership 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 (S1-4(-1 day of Me. , 2.OV7 HALL-IRWIN CORPORATION If Corporation Attest(Seal) Applicant/Operator or Compa y Name Signed / Signed: e9,47.44._. Corporate Secretary or Equivalent Title: C- Town/City/County Clerk State of Co\O Cae Oi`_ ) )ss. County of Q C5 The foregoing instrument was acknowledged before me this l5 'n day of CIc J2- `' as —_ C O of Oc,i 1 o rc'{;4o_ afrbs Notary Public {f s ry 9 �;. my commission expires: � 2 o_... .. �h C� 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) , _ ‘1 J\ , whose address and phone number is(Address and Phone Number of the Applicant/Operator) I ',�qt a,\I f,� �;��10 j 0( 9 j Mined Land Reclamation Board. Anyone 'shin to comment on the has applied for a Reclamation Permit with the Colorado 1 y g application may view the application at the(County Name)n _�, A( County Clerk and Recorder's Office, (Clerk and Recorder's Office Address) iii ��9 ' ) ./lItt L7C:© ' and should send comments prior to the end of u the public comment period to the Division of Reclamation, Mining, and Safety, 1313 Sherman St, Room 215, Denver, Colorado 80203. Certification: 1, f l (1,11 W,OiCZO ,hereby certify that I posted a si containing the above notice for the proposed k r permit area known as the(Name of Operation) 1 to Posted) o.3 f' G A URE DATE Summary Table of Changes to Exhibits Exhibit Change Exhibit A-Legal Description No change Exhibit B- Index Map No change Exhibit C-Pre-Mining and Mining Plan Map Slurry wall added to the HIBE parcel (phase 4) Exhibit D—Mining Plan Annual production has been increased to 900,000 tons/year and phase 4 will be mined at a 3:1 slope. Exhibit E—Reclamation Plan Slurry wall design specifications are included with this application. Exhibit F—Reclamation Plan Map The HIBE parcel (phase 4)will be reclaimed into a water storage reservoir. Exhibit G—Water Information No change—Hall-Irwin will continue to operate under the approved Temporary Substitute Water Supply Plan. Exhibit H—Wildlife Information No change Exhibit I—Soils Information No change Exhibit J—Vegetation Information No change Exhibit K—Climate Information No change Exhibit L—Reclamation Costs We request that the Division calculate the reclamation costs. Exhibit M—Other Permits and Licenses No change Exhibit N—Source of Legal Right to Enter No change Exhibit 0—Owners of Record of Affected Land No change (Surface Area) and Owners of Substance to be Mined Exhibit P—Municipalities Within Two Miles No change Exhibit Q—Proof of Mailing of Notices to Attached County Commissioners and Soil Conservation District Exhibit R—Proof of Filing with County Clerk or Attached Recorder Exhibit S—Permanent Man-Made Structures We are providing a stability analysis to reflect the installation of a slurry wall around Phase 4 of the Mining Plan (the HIBE property). AMENDMENT TO BASELINE PERMIT#M-1997-058 • EXHIBIT C — PRE-MINING AND MINING PLAN MAP The Mining Plan has been revised to show a slurry wall around Phase 4, which is also known as the HIBE property. This phase will be mined at a 3:1 slope. AMENDMENT TO BASELINE PERMIT#M-1997-058 i i 5Yt ASELINE ROBERT L& - II VALERIE A.PARKER I - - - I DOGE OF i PHASE 3 _ RESOURCE IIII EDGE OF PAULA& DISTURBED CARL E EIBERGER . AREA MINING RUTH E - STRUCK -� Is®. TANK -- . -Y k o X— EXISTING -; - Ip .:� // - DPI L I1 \ ` U, p • NORTH- FLOODPLAIN INFORMATION: MAINTAIN 37.5'SETBACK +, H r i •' = ys I FROM GAS-PIPELINE TO rp WATER �`I THIS PROPERTY LIES ENTIRELY WITHIN ZONE A•AREA OF 100-YEAR FLOOD: ...b DISCHARGE �� EDGE OF MINING FOP. - /a `U r1 PUTAp ® _-� BASE FLOOD ELEVATIONS AND FLOOD HAZARD FACTORS NOT DETERMINED a 1 =q \ STEP 1 '0 { ' I (IN FEET I ACCORDING TO FIRM FLOOD INSURANCE RATE MAP PANEL NO.0802660995 C, ,� BACKFILL TO CREATE '° p ! i SEPTEMBER 26.1902. .(:1, •\ 75•SETBACK FROM HAUL ROAD .� /GAS PIPELINE TO EDGE T's I� ( _ - _ -- \\\ \• OSLOPE MINING/RECLAIMED CONVEYOR 9 p 4.," NOTES:g \\ `-- Ip r LEGEND: 1. AN ENGINEERING STABILITY ANALYSIS HAS BEEN PERFORMED TO ENSURE ANY MINING rs \ \DIL/cas o a 0 0 0 0 0 o a qo 0 0 0,0 p(! OCCURRING WITHIN:200 FEET OF A MAN-MADE STRUCTURE THAT IS NOT TO BE DEMOLISHED AND. IS - \ -r MIL - 1 r; NOT OWNED BY THE APPLICANT/OPERATOR HAS ADEQUATE SETBACK DISTANCE. \ (ACCESS. . Io8s EXISTING PERMIT I. ALONG 1� 2. THE MINING OPERATION WILL USE DRY MINING TECHNIQUES AND EXCAVATE MATERIAL BY o GAS PHASE 4 I BACKHOE,BULLDOZER,AND SIMILAR EQUIPMENT. MINE h LINE) p- ----- SECTION LINE £ 34.4 ACRES +/- 3, TYPICAL MINE FACE WILL 5E.3(H):1(V),.HOWEVER THIS MAY BE MODIFIED BASED ON THE �3(H):1(V) p MONITORING PHASE 2 SECTION CORNER RESULTS OF THE STABILITY ANALYSIS. ,K TYP. (g(..Ii WELL r + IJ�H _ 31 ACRES+/- 4 CONVEYOR/INTERNAL HAUL ROAD WILL EXTEND INTO EACH PHASE AS MINING'PROGRESSES. 9 t - EXISTING FENCE S, TEMPORARY TOPSOIL STOCKPILES WILL BE PLACED ALONG THE PERIMETER OF THE MINE LIMIT. f II I STOCKPILES LOCATED WITHIN THE 100-YEAR FLOODPLAIN WILL BE ALIGNED PARALLEL TO THE - - I 1p . '_- _' EXISTING TREES FLOOD-FLOW'DIRECTION:OF THE SOUTH PLATTE RIVER AND WILL HAVE A MAXIMUM HEIGHT OF 30' `APPROXIMATE f 1 A MAXIMUM BASE WIDTH OF 100',A MAXIMUM SLOPE OF 3H:1V AND A MINIMUM OF 100' BETWEEN ( ; / LOCATION OF 1 11 G___ EXISTING GAS LINE 'PILES, - 6 SLURRY WALL [1-,,,'"----.-_____ 6. STOCKPILES THAT ARE UNDISTURBED FOR MORE THAN 45 DAYS WILL BE SEEDED WITH THE I -T EXISTING TELEPHONE LINE I„ REFER TO STABILITY 0 CONVEYOR AND NATIVE GRASS SEED MIX SHOWN ON THIS PLAN AT A RATE OF 9.6 PLS PER ACRE WEATHER HAUL ROAD ALONG EXISTING ELECTRIC LINE - " ,,,(((ANALYSIS FOR Ip 1 PERMITTING AND MONITORED FOR WEED CONTROL. • - SETBACKS(TYP.) p PROPERTY LINE 7, STOCKPILED TOPSOIL WILL BE SEGREGATED FROM OTHER MATERIAL,STOCKPILED AROUND 2 EXISTING TELEPHONE PEDESTAL THE PERIMETER OF THE MINING AREA AND SEEDED. °, _ 0 8. THE OPERATION WILL INCLUDE CONCURRENT MINING AND RECLAMATION, ' J ----'��.� "9 EXISTING WELL 9., A MINIMUM OFTEN(10)FEET OF CLEARANCE FROM ANY EXISTING POWERLINE OR FUTURE dXls"�G I 57: l��o m m p I _ - POWERLINE SHALL BE MAINTAINED AT ALL TIMES AS OUTLINED BY STATE STATUTES. nfSW -.—--�-�-1 -- I, —— 5 � - EXISTING POWER POLE ) +- 1 l —�- -a,,,, .---_----- ..�1 10. UTILITIES SHOWN ON THIS PLAN WERE PROVIDED BY OTHERS. FOR SAFEfI'THE OPERATOR FS 1 / ) 1 p--- - _ CONVEYOR SHOULD LOCATE UTILITIES PRIOR TO SLURRY WALL CONSTRUCTION OR MINING ACTWITY. I' �""1 Ik�1NDY L p " =I ;p I - - 11. PRIOR TO CONSTRUCTION ALL UTILITY,GAS WELL,OIL WELL AND WATER WELL LOCATIONS I-,rK.RVRY RICK L, k 1 :I I aoo HAUL ROAD MUST BE VERIFIED. V o ' ! I 12, SLURRY WALL SHOWN.HEREIN IS GENERAL LOCATION ONLY. SLURRY WALL DESIGN PLANS AND _F s•m :,Nn :•% n° s of ■l'' {� I q E EDGE OF DISTURBED AREA SPECIFICATIONS ARE INCLUDED WITH THIS APPLICATION. 6O' // ° -�iw SETTLITIG PONDS I 13, ALL STRUCTURES WITHIN THE MINING BOUNDARY WILL BE REMOVED. I FOR WASH EDGE OF MINES AREA 14, THIS AMENDMENT APPLIES TO PHASE 4 OF THE BASELINE RESOURCE OPERATION. A SLURRY WALL i30WWILL BE EXTENDED AROUND THE MINING AREA THAT WILL TIE INTO THE SLURRY WALL ON THE ii SLURRY WALL DERSHAM PARCEL TO THE SOUTH AND THE EXISTING SLURRY WALL TO THE EAST. PHASE 4 WILL BE N m• "� • - MINED AS A SINGLE CELL. UNCHANGED PHASE LIMITS FOR MINING ARE SHOWN INA DASHED "PROCESSING _ - 7—......._ - -- UNCHANGED MINE PHASE LIMRS LINETYPE. liar AREA.+-I I - "- ' EXISTING SLURRY WALL N -_-. ao I II PARKER-DERSHAM II 'r - - I i CERTIFICATION NOTE: U 1 M-2006-003 -I 'I STOCKPILES _ a PHASE 3 2C THIS MAP WAS PREPARED BY CNIL RESOURCES,LLC IN COOPERATION WITH I> HALL-IRWIN CORPORATION.THE EXACT CONFIGURATION OF THE MINING. Z j I I PHASE£H ORARY ! EXISTING - PODS AND RECLAIMED PONDS MAY CHANGE TO RESPOND TO FIELD Ili - 16 gCREQBIK ! GROUND R CONDITIONS.HAL_-IRWIN WILL KEEP THE DIVISION OF RECLAMATION AND O it __,.___ _ __ _ _ PHASE 6 STOCKPILES I MINESAFETY INFORMED OF ANY CHANGES THROUGHANNUAL REPORTS AN0 U II _ �' 24 ACRES•/- I X25'Typ FILE TECHNICAL REVISIONS AND AMENDED APPLICATIONS AS NECESSARY - _ _ _--_ - I I 7'MIN �.- THROUGHOUT THE LIFE OF THE MINE. MINE SLOPE 3I ! I -R4Y�¢ING 3H:1V � SAND&GRAVEL li wK NOT ASPHALT SAND &GRAVEL SLURRY WALL - . 5 " i _-�_� :I PLANT _ ■ RTIZ I I �. i \! .- _-_ _.._.._..__ - 0 VNNRESOURCES, LLC 0 i TYPICAL MINING CROSS SECTION I it :1,...,, F • SCALE HORSE --------- - !------ - >> NOT TO SCALE AND GRA VFL OB/TS STOCKPILE I a 1! J OFFICE I DATE LANDSCAPE 1 WITH TREES { „ J I ''� -AREA - d=v �' TOTAL PROCE INS CONCREI' II S PROCESSING .II 1 559575 :FARMS - I !.. SARAH J k jj MARCUS CAINE& ,r .___ RUMFORD 44 KELLIE POLIIZKI 2I jI' ) . —,.-- -LJ - .toms II it_ e. ___ -__ e ACCESS ___ EAST 168TH STREET ) (BASELINE ROAD) ' I ADAMS COUNTY E I E 9 HALL-IRWIN CORPORATION 3 REVISIONS AMENDMENT TO MLRB 112 I A0. DESCRIPTION DATE BY PERMITMINING PLANT 058 E 323 5tIT Street I 303 8331416(0)303 933 2850(f) CIVIL R E S'DU R C E S,LLC C R0.Box 680 Frederick,CO 80530 fo DESIGNED BY: SKF JOB f36. IOWG: DATE: APRIL 2008 Nirby Amendment 040B06.dA5 Al CHECKED BY: DO 1 Ig SCALE: AS NOTED 43-0032 055.03 SHEET; EXHIBIT D — MINING PLAN Hall-Irwin Corporation will continue to use the mining method described in the original Baseline permit application. The only changes to the mining plan are as follows: 1. Annual production:The application estimated production could be up to 550,000 tons per year. We now anticipate that annual production could be as high as 900,000 tons per year. 2. Mining slope: Phase 4 will be mined at a 3:1 slope. AMENDMENT TO BASELINE PERMIT#M-1997-058 EXHIBIT E — RECLAMATION PLAN Hall-Irwin Corporation will continue to use the reclamation process specified in the original Baseline permit application. However, Phase 4 will be reclaimed to a water storage reservoir. The specifications for the slurry wall around Phase 4(and Hall-Irwin's Parker Dersham Resource —permit#M-2006-003)are attached. AMENDMENT TO BASELINE PERMIT#M-1997-058 TECHNICAL SPECIFICATIONS FOR THE KIRBY-DERSHAM PIT SLURRY WALL LINING PROJECT Prepared for: HALL-IRWIN CORPORATION 301 Centennial Drive Milliken, Colorado 80543 D&A Job No: CG-0134.025.00 April 2008 DEERE & AULT CONSULTANTS, INC. 600 South Airport Road,Suite A-205 Longmont,CO 80503 (303)651-1468 • Fax(303)651-1469 TECHNICAL SPECIFICATIONS KIRBY-DERSHAM PIT SLURRY WALL LINING PROJECT TABLE OF CONTENTS Division 1 -General Requirements Section 01050 Field Engineering Section 01070 Abbreviations and Symbols Section 01160 Site Conditions Section 01300 Submittals Section 01330 Survey Data Section 01400 Quality Control Section 01600 Material and Equipment Section 01700 Contract Closeout Division 2-Site Work Section 02100 Site Preparation Section 02140 Dewatering Section 02168 Slurry Wall Construction Section 02290 Platform and Fill Area Construction Tables Table 1 Materials Quality Control Program P:\0134 Hall Irwin Construction\0134.025 Kirby-Dersham Pits\Technical Specifications\Final Specifications\TOC.doc April 2008 DIVISION 1 GENERAL REQUIREMENTS DIVISION 1 - GENERAL REQUIREMENTS SECTION 01050-FIELD ENGINEERING PART 1-WORK COVERED 1.01 SURVEYING The Engineer will field establish horizontal control points. The Engineer shall also provide offset staking of the centerline slurry wall alignments. END OF SECTION 4/08 Section 01050-Page 1 of 1 • DIVISION 1 -GENERAL REQUIREMENTS SECTION 01070-ABBREVIATIONS AND SYMBOLS Wherever used in these Specifications,the following abbreviations shall have the meanings indicated: AASHTO American Association of State Highway and Transportation Officials ANSI American National Standards Institute API American Petroleum Institute ASTM American Society for Testing and Materials COSH Colorado Occupational Safety and Health Standards Board OSHA Occupational Safety and Health Administration MSHA Mine Safety and Health Administration psi pounds per square inch SEO State Engineer's Office Where standard specifications are referenced in the Contract Documents,the latest revision is intended unless specified otherwise. END OF SECTION 2/08 Section 01070-Page 1 of 1 DIVISION 1 - GENERAL REQUIREMENTS SECTION 01160-SITE CONDITIONS PART 1-SITE INVESTIGATIONS AND REPRESENTATION 1.01 GENERAL The Contractor acknowledges that he has satisfied himself as to the nature and location of the work,the general and local conditions,particularly those bearing upon access to the site;handling,storage,and disposal of materials;availability of water,electricity,and roads;uncertainties of weather,river stages,or similar physical conditions at the site;the conformation and conditions of the ground;the equipment and facilities needed prior to and during the execution of the work;and all other matters which can in any way affect the work. 1.02 Sr1'h CONDITIONS The Contractor further acknowledges that he has satisfied himself as to the character,quality and quantity of surface and subsurface materials to be encountered from his inspection of the site and from reviewing any available records of exploratory work furnished by the Owner or included in these documents. Failure by the Contractor to acquaint himself with the physical conditions of the site and all the available information will not relieve him from responsibility for properly estimating the difficulty or cost of successfully performing the work. 1.03 WARRANTEE The Contractor warrants that as a result of his examination and investigation of all the aforesaid data that he can perform the work in a good and workmanlike manner. 1.04 The site is an active mine and is therefore governed by MSHA regulations. The Contractor shall comply with all MSHA and OSHA regulations,as well as the mine operator's site specific safety plan and any state or local safety or work site regulation. PART 2-INFORMATION ON SITE CONDITIONS 2.01 AVAILABILITY Any information obtained by the Engineer regarding site conditions,subsurface information,groundwater elevations,existing construction of site facilities,and similar data will be available for inspection,as applicable,at the office of the Engineer upon request. Such information is offered as supplementary information only. The Engineer does not assume responsibility for the completeness or interpretation of such supplementary information. A. Differing Subsurface Conditions 1. In the event that the subsurface or latent physical conditions are found materially different from those indicated in these documents,and differing materially from those ordinarily encountered and generally recognized as inherent in the character of work covered in the Plans and Specifications,the Contractor shall promptly,and before such conditions are disturbed,notify the Engineer in writing of such changed conditions. 2. The Engineer will investigate such conditions promptly and following this investigation, the Contractor shall proceed with the work,unless otherwise instructed by the Engineer. 2/08 Section 01160-Page 1 of 3 • B. Underground Utilities 1. Known utilities and structures adjacent to or encountered in the work are shown on the Plans. The locations shown are taken from existing records and the best information available from existing utility plans;however,it is expected that there may be some discrepancies and omissions in the locations and quantities of utilities and structures shown. Those shown are for the convenience of the Contractor only,and no responsibility is assumed by the Engineer for their accuracy or completeness. PART 3-CONTRACTOR'S RESPONSIBILITY FOR UTILITY PROPERTIES AND SERVICE 3.01 GENERAL A. Where the Contractor's operations could cause damage or inconvenience to railway,telegraph, telephone,television,oil,gas,electricity,water,sewer,or irrigation systems,the operations shall be suspended until all arrangements necessary for the protection of these utilities and services have been made by the Contractor. B. Notify all utility offices which are affected by the construction operation at least 48 hours in advance. Under no circumstances expose any utility without first obtaining permission from the appropriate agency. Once permission has been granted,locate,expose,and provide temporary support for all existing underground utilities. C. The Contractor shall protect all utility poles from damage. If interfering power poles,telephone poles,guy wires,or anchors are encountered,notify the Engineer and the appropriate utility company at least 48 hours in advance of construction operations to permit the necessary arrangements for protection or relocation of the interfering structure. D. The Contractor shall be solely and directly responsible to the owner and operators of such properties for any damage,injury,expense,loss,inconvenience,delay,suits,actions,or claims of any character brought because of any injuries or damage which may result from the construction operations under this contract. E. The Engineer shall not be responsible to the Contractor for damages as a result of the Contractor's failure to protect utilities encountered in the work. F. If the Contractor,while performing the contract,discovers utility facilities not identified in the Plans or Specifications,he shall immediately notify the utility and the Engineer in writing. G. In the event of interruption to domestic water,sewer,storm drain,or other utility services as a result of accidental breakage due to construction operations,promptly notify the proper authority. Contractor shall cooperate with said authority in the restoration of service as promptly as possible and bear all costs of repair. In no case shall interruption of any water or utility service be allowed to exist outside working hours unless prior approval is granted. H. The Contractor shall replace,at his own expense,any and all other existing utilities or structures removed or damaged during construction,unless otherwise provided for in these Contract Documents or ordered by the Engineer. 3.02 INTERFERING STRUCTURES A. Take necessary precautions to prevent damage to existing structures and utilities whether on the surface,above ground,or underground. An attempt has been made to show major structures on the Drawings. The completeness and accuracy cannot be guaranteed,and it is presented simply as a guide to avoid known possible difficulties. Section 01160-Page 2 of 3 2/08 3.03 FIELD RELOCATION • A. During the progress of construction,it is expected that minor relocations of the work will be necessary. Such relocations shall be made only by direction of the Engineer. If existing structures are encountered that prevent the construction,and that are not properly shown on the drawings, notify the Engineer before continuing with the construction in order that the Engineer may make such field revision as necessary to avoid conflict with the existing structures. If the Contractor shall fail to so notify the Engineer when an existing structure is encountered,and shall proceed with the construction despite the interference,he shall do so at his own risk. 3.04 EASEMENTS A. Where portions of the work are located on public or private property,easements and permits will be obtained by the Contractor. Easements will provide for the use of the property for construction purposes to the extent indicated on the easements. Copies of these easements and permits should be available on-site. It shall be the Contractor's responsibility to determine the adequacy of the easement obtained in every case and to abide by all requirements and provisions of the easement. The Contractor shall confine his construction operations to within the easement limits or make special arrangements with the property owners or appropriate public agency for the additional area required. Any damage to property,either inside or outside the limits of the easements shall be the responsibility of the Contractor as specified herein. The Contractor shall remove,protect,and • replace all fences or other items encountered on public or private property. B. It is anticipated that the required easements and permits will be obtained before construction is started. However,should the procurement of any easement or permit be delayed,the Contractor shall schedule and perform the work around these areas until such a time as the easement or permit has been secured. 3.05 LAND MONUMENTS A. The Contractor shall notify the Engineer of any existing federal,state,town,county,and private land monuments encountered. All monuments shall be preserved,or replaced by a licensed surveyor at the Contractor's expense. When Government monuments are encountered,the Contractor shall notify the Engineer at least 2 weeks in advance of the proposed construction in order that the Engineer will have ample opportunity to notify the proper authority and reference these monuments for later replacement. END OF SECTION 2/08 Section 01160-Page 3 of 3 • DIVISION 1 -GENERAL REQUIREMENTS SECTION 01300-SUBMITTALS PART 1-WORK COVERED 1.01 GENERAL A. The Contractor shall furnish,process,deliver,reproduce,and perform other necessary functions incidental to scheduling and handling of shop drawings,project data and samples,operational and maintenance manuals,equipment record sheets,manufacturer's certificate of proper installation, and record drawings,as indicated on drawings,or as specified,and in accordance with the provisions of the Contract Documents. B. See appropriate Specifications and Contract Document sections for specific items for which data and/or samples are required. See General Conditions for additional information. C. Review or acceptance of substitutions,schedules,shop drawings,lists of materials,and procedures submitted or required by the Contractor,and all additional costs which may result there from shall be solely the obligation of the Contractor. It shall not be the responsibility of the Engineer to provide engineering or other services to protect the Contractor from additional costs accrued from such review or acceptance. D. No equipment or material for which listings,drawings,or descriptive material is required shall be installed until the Engineer has on hand copies of such accepted lists and the appropriately stamped fmal shop drawings. E. The review of drawings by the Engineer will be limited to general design requirements only,and shall in no way relieve the Contractor from responsibility for errors or omissions contained herein. F. Submittals will be acted upon by the Engineer as promptly as possible. 1.02 BACKFILL MATERIAL A. The Contractor shall furnish a sample of the soil to the Engineer he anticipates utilizing as backfill material from a borrow source with proven capacity to backfill the entire trench. This soil sample will be subjected to permeability testing after being mixed with bentonite from the Contractor's supplier. This testing will determine the percent of dry bentonite that will be mixed into the soil- bentonite backfill in order to achieve a permeability of 1 x 10''cm/s or less. Gradation and Atterberg Limit tests will be performed to establish control on the backfill throughout the project. 1.03 ADDRESS Submittals shall be sent to the following address: Attn: Mr.Colby Hayden,P.E. Deere&Ault Consultants,Inc. 600 South Airport Rd,Building A,Suite 205 Longmont,CO 80503 END OF SECTION 4/08 Section 01300-Page 1 of 1 DIVISION 1 - GENERAL REQUIREMENTS SECTION 01330-SURVEY DATA PART 1-WORK COVERED 1.01 SURVEY REQUIREMENTS A. Construction Stakeout: 1. Perform construction stakeout with qualified,competent personnel. 2. Engineer shall establish all temporary benchmarks as found on the drawings. Base all vertical measurements on established control. 3. Stake the slurry trench along its alignment at all beginning and ends of all curves and at 50'to 100'stations. B. All survey data developed by Contractor in performing surveys required by the work will be available to the Engineer for examination throughout the construction period. END OF SECTION 4/08 Section 01330-Page 1 of 1 ' DIVISION 1 - GENERAL REQUIREMENTS SECTION 01400-QUALITY CONTROL PART 1-GENERAL 1.01 QUALITY CONTROL SYSTEM A. Records The Construction Superintendent shall maintain correct records on an appropriate form for all inspections and tests performed,instructions received from the Engineer,and actions taken as a result of those instructions. These records shall include evidence that the required inspections or tests have been performed(including type and number of inspections or tests,nature of defects, causes for rejection,etc.),proposed or directed remedial actions,and corrective action taken. The Construction Superintendent shall document inspections and tests as required by each section of the Specifications. A file containing the testing records shall be maintained in the Construction Superintendent's site office. These records shall be updated daily. The records will be available to the Project Manager and Engineer for review during their site visits. PART 2-NOT USED PART 3-NOT USED END OF SECTION 4/08 Section 01400-Page 1 of 1 DIVISION 1 - GENERAL REQUIREMENTS SECTION 01600-MATERIAL AND EQUIPMENT 1.01 GENERAL Where possible,the Contractor shall provide the entire required quantities of each product from a single source. 1.02 SPECIFIC MATERIALS AND"ACCEPTED SUBSTITUTES" The Contractor may substitute a material or product other than those specified by name or brand,provided that requests are submitted and accepted by the Engineer. 1.03 PROPRIETARY PRODUCTS Specifying of proprietary products is not meant to exclude competition,but is intended to set a minimum standard. The words"or accepted substitute"are implied after any proprietary name. Substitutions will be considered according to specified substitution procedures. 1.04 PRODUCTS LIST A list of all products to be incorporated in the work,with specific manufacturer's name and reference number,is to be furnished to the Engineer. END OF SECTION 2/08 Section 01600-Page 1 of 1 ' DIVISION 1 - GENERAL REQUIREMENTS SECTION 01700-CONTRACT CLOSEOUT 1.01 CLOSEOUT PROCEDURES The following project closeout procedure defines the responsibility of the Contractor and Engineer in closing the project: Step 1: Contractor advises the Engineer in writing that he has reached"Substantial Completion" of all or selected portions of the work,and provides a list of items to be completed or corrected. Step 2: Engineer observes the work to determine if it is substantially complete,and issues a "Punch List"of items to be completed or corrected. Step 3: Contractor completes and/or corrects all punch list items and notifies the Engineer in writing that his work is ready for fmal inspection. Step 4: Engineer makes final examination. When all the work is found to be acceptable,the Engineer will prepare a fmal construction report and as-built plans meeting the requirements of the Contractor. END OF SECTION 4/08 Section 01700-Page 1 of 1 DIVISION 2 SITE WORK • DIVISION 2-SITE WORK SECTION 02100-SITE PREPARATION PART 1-GENERAL 1.01 WORK INCLUDED Clearing trees and brush from the slurry wall alignments and slope liner. Stripping upper soil layer to prepare for placement of new impervious fill. 1.02 RELATED WORK Section 02290—Platform Fill Area Construction PART 2-NOT USED PART 3-EXECUTION 3.01 GENERAL The Contractor shall,by their own investigation,determine the extent and effort of clearing required in accordance with this section. 3.02 CLEARING AND GRUBBING Clearing of the ground surface along the slurry wall alignment and in fill areas will be at the direction of the Engineer. The area to be occupied by the permanent construction required under these specifications and the surfaces of all borrow pits,stockpiles,and fill areas shall be cleared of all trees,stumps,exposed roots,brush,rubbish,and other objectionable matter as determined by the Engineer. 3.03 STRIPPING The fill areas shall be stripped to a depth of 6"or to a sufficient depth,as determined by the Engineer,to remove all unsuitable materials. The unsuitable materials to be removed by stripping shall include all surface boulders and loose rock,debris,topsoil,vegetable matter,including stumps and roots,and all other perishable and objectionable materials that are unsuitable for use in permanent construction required under these specifications or that might interfere with the proper bonding of the embankment with the foundation, or the proper compaction of the fill materials,or that may be otherwise objectionable as determined by the Engineer. 3.04 DISPOSAL Materials from clearing operations shall be removed from the construction site or otherwise disposed of as approved by the Engineer. Waste piles shall be located where they will not interfere harmfully with the natural flow of the stream and drainage channels,with construction operations in the borrow areas,or with the operation of the Owner. Waste piles shall be leveled and trimmed to reasonable regular lines. END OF SECTION 2/08 Section 02100-Page 1 of 1 DIVISION 2 SITE WORK • SECTION 02140-DEWATERING PART 1-GENERAL 1.01 WORK INCLUDED The Contractor shall control surface water and associated dewatering requirements to provide a dry and stable working area for all construction activities on-site. 1.02 RELATED WORK A. Section 02168-Slurry Wall Construction B. Section 02190-Platform and Fill Area Construction 1.03 REFERENCES(NOT USED) 1.04 SUBMITTALS (NOT USED) PART 2-NOT USED PART 3-EXECUTION 3.01 GROUNDWATER Not applicable to construction of slurry wall. 3.02 SURFACE WATER All surface water shall be controlled as needed to construct the slurry wall. END OF SECTION 4/08 Section 02140-Page 1 of 1 DIVISION 2- SITE WORK SECTION 02168-SLURRY WALL CONSTRUCTION PART 1-GENERAL 1.01 SLURRY TRENCH CUTOFF A low permeability slurry trench cutoff wall shall be constructed to the lines,grades,and crass-sections as indicated on the drawings. The trench shall have essentially vertical walls,a minimum width of 30",and shall extend through the foundation materials and into the bedrock. A generalized description of the overburden through which the slurry trench cutoff is to be excavated is indicated by summary logs of exploratory borings included in the Drawings. PART 2-MATERIALS 2.01 SLURRY Slurry shall consist of a stable colloidal suspension of bentonite in water and shall be controlled in accordance with the most current API Standard 13B,"Standard Procedure for Testing Drilling Fluids,"and the following requirements: A. At the time of introduction of the slurry into the trench,the slurry shall be a mixture of not less than 12.5 pounds per barrel(42 gallons)of bentonite and water. Additional bentonite may be required depending on the hardness and temperature of the water and the quality of the bentonite. The slurry shall have a minimum apparent viscosity of 40-seconds reading through a Marsh Funnel Viscosimeter,a maximum filtrate loss of 30 cubic centimeters in 30 minutes at 100 psi,and a pH of greater than or equal to 7 and less than 10. B. The slurry mixture in the trench will have a unit weight not less than 1.03 gm/cc(64 pcf),not greater than 1.40 gm/cc(87 pcf),or as approved by the Engineer. C. The slurry mixed with backfill material shall be either slurry taken from the trench or slurry meeting the requirements of slurry introduced into the trench. 2.02 BENT0NITE Bentonite used in preparing slurry shall be pulverized(powder)premium grade sodium cation montomorillonite and shall meet the most current API Standard 13A,"API Specification for Oil-Well Drilling -Fluid Materials." 2.03 WATER Fresh water,free of excessive amounts of deleterious substances that adversely affect the properties of the slurry shall be used to manufacture bentonite slurry. It is the responsibility of the Contractor that the slurry resulting from the water shall always meet the standards of this Specification. 2.04 ADDITIVES Admixtures of the type used in the control of oil-field drilling muds such as softening agents,dispersants, retarders or plugging or bridging agents may be added to the water or the slurry to permit efficient use of bentonite and proper workability of the slurry. However,no additives shall be used except as approved by the Engineer. 4/08 Section 02168-Page 1 of 5 2.05 BACKFILL The material for trench backfilling shall be composed of slurry,dry bentonite,and selected soils obtained from the trench and designated borrow areas. The soil shall be friable and free from roots,organic matter,or other deleterious materials. The backfill shall be thoroughly mixed and reasonably well graded between the following gradation limits: Screen Size Percent Passing (U.S.Standard) by Dry Weight 2" 80-100 3/8" 65-100 No.20 40-85 No.200 ≥25 The fines in the backfill soil shall have sufficient plasticity so that the material can be rolled into a 1/8"thread without crumbling. The water content of the backfill material shall not exceed 20%prior to blending with bentonite and/or slurry. The percent passing the No.200 sieve will be,in general,maintained at greater than 30%. When testing reveals a value less than 30%,corrective action will be taken to prevent a fines content value below the specified 25 percent minimum. Material excavated from the trench is not expected to meet the above requirements for backfill. Excess sand and gravel excavated from the slurry trench will need to be"wasted"and not included in the final backfill mix. The"wasted"sand and gravel shall be replaced with approved supplemental clay soils. Supplemental clay soils may have to be stockpiled along the slurry wall alignment as directed by the Engineer. Samples of the borrow material to be used in the backfill will need to be tested well in advance of slurry wall construction to prove an adequate supply of acceptable material is on hand. Laboratory results indicate an addition of dry bentonite at a rate of 0.5%of the dry weight of backfill material will provide an adequate reduction in permeability. PART 3-EXECUTION 3.01 TRENCH EXCAVATION EQUIPMENT Excavation of the slurry trench cutoff wall shall be accomplished by use of any suitable earth-moving equipment or combination thereof such as a backhoe and/or clamshell so that the required width trench can be carried to its final depth of cut continuously along the trench line. Special chopping,chiseling or other suitable equipment may be used as necessary to satisfactorily accomplish the required excavation. The width of the excavating tool shall be equal to or greater than the specified minimum width of the cutoff wall. Additional equipment such as air lift pumps and slurry desanders shall be used if required to clean the trench bottom and/or slurry in accordance with the requirements of the Specifications. 3.02 SLURRY BATCHING PLANT The slurry batching plant shall include the necessary equipment including a mixer capable of producing a colloidal suspension of bentonite in water,pumps,valves,hoses,supply lines,and all other equipment as required to adequately supply slurry to the trench. Storage ponds shall be provided to store initially mixed slurry to allow hydration and to serve as a reserve in cases where substantial slurry loss from the trench through underlying pervious zones or other reasons may occur. The slurry shall be agitated or recirculated in the storage ponds as required to maintain a homogeneous mix. All slurry for use in the trench shall be prepared using a suitable mixer. No slurry is to be made in the trench. Mixing of water and bentonite shall continue until bentonite particles are fully hydrated and the resulting slurry appears homogeneous. 4/08 Section 02168-Page 2 of 5 3.03 BACKFILL MIXING AND PLACING EQUIPMENT Equipment for mixing and placing backfill may consist of a suitable type of earthmoving or grading equipment,such as bulldozers,or blade graders,or blenders such as a pug mill,that are capable of thoroughly mixing the backfill materials into a homogeneous paste having the required gradation and properties and placing the material in the trench as hereinafter specified. 3.04 SLURRY TRENCHING Excavation shall be carried to final depth at the point where excavation is started and then the final depth of cut shall be carried along the line of the trench. Excavation shall proceed continuously from the starting point to the finishing point. Slurry shall be introduced into the trench at the same time trenching is begun and shall be maintained in the trench during excavation and until backfllied. The Contractor shall maintain the stability of the excavated trench at all times for its full depth. The level of bentonite slurry shall not be permitted to drop more than 2'below the surface of the slurry trench working platform except as approved by the Engineer. The Contractor shall have personnel,equipment,and materials ready to raise the slurry level at any time. To this end,the Contractor shall have personnel on call to raise the slurry level,weekends and/or holidays included. 3.05 TRENCH BOTTOM Unless otherwise directed by the Engineer,the bottom of the slurry trench will be extended a minimum of 4' below the surface of competent bedrock. Weathered rock of uncertain quality overlies bedrock. Key trench depth will be measured from the surface of competent bedrock as determined by the quality control testing technician and the Engineer. The Contractor shall provide sufficiently powered excavation equipment capable of penetrating through the bedrock to the prescribed depth. The final depth and penetration of the trench shall be measured and checked by the Contractor and approved by the Engineer immediately following excavation. 3.06 CLEANING TRENCH BOTTOM Upon completion of excavation,any loose material or cuttings shall be removed from the bottom of the trench with the excavation tools or other suitable means such as air lift pumps. If the unit weight of the slurry in the trench exceeds the specified limits,or becomes unworkable,the heavy slurry shall be removed from the trench by airlift pump,clamshell,or other methods approved by the Engineer or the excess solids shall be removed from the slurry by screening or centrifugal-type desander. 3.07 BACKFILL MIXING Material from borrow shall be mixed and blended in mechanical blenders or by windrowing,disk harrowing, bulldozing,blading or by other approved methods. Mixing and blending shall be performed in such a manner as to produce the required gradation of backfill. The backfill material shall be thoroughly mixed into a homogeneous mass,free from large lumps or pockets of fines,sand,or gravel. Occasional lumps of up to 6"in their largest dimension will be permitted. Just prior to placing,the backfill material shall have a slump of 2"to 6". To this end,the material shall be sluiced with slurry during blending operations. Sluicing with water will not be permitted. Containment berms will be constructed where necessary to prevent slurry from entering rivers or ditches or flowing across the project boundary. 3.08 BACKFILL PLACEMENT The backfill shall be placed continuously from the beginning of the trench,in the direction of the excavation, to the end of the trench. The toe of the slope of the trench excavation shall precede the toe of the backfill slope so that the toe of the backfill shall not be less than 50'following the toe of the excavation,or as required to permit proper cleaning of the trench bottom and to permit inspection and measurement. Placing operations shall proceed in such a fashion that the surface of the backfill below the slurry shall follow a reasonably smooth grade and shall not have hollows which may trap pockets of slurry during subsequent backfilling. Free dropping of backfill material through the slurry will not be permitted. Initial backfill shall be placed by lowering it to the bottom of the trenches with clamshell bucket until the surface of the backfill rises above the surface of the slurry trench at the end of the trench. Additional backfill may then be placed in such a manner that the backfill enters the trench by sliding down the forward face of the previously placed backfill. To 4/08 Section 02168-Page 3 of 5 accomplish this,sufficient backfill shall be piled on the edge of the existing backfill to cause a slump and sliding action on the face of the in-place backfill. The backfill shall not be dropped or deposited in any manner that will cause segregation. An acceptable substitute for the initial placing of backfill by the use of a clamshell bucket,shall be to begin excavation at a point outside of the limits of work which will provide a sufficient distance for the backfill face to form,by pushing backfill into the trench,before the toe of the backfill reaches the point where the cutoff is required. 3.09 TREATMENT FOR TOP OF CUTOFF TRENCH Upon completion of backfill placement,and before drying of the backfill can occur,the cutoff trench shall be capped in accordance with the details shown on the Drawings or as directed by the Engineer. 3.10 CLEAN-UP After completion of the backfill and capping,all remaining excavated material and slurry shall be removed and placed in thin lifts along the inside face of the reservoir and the surface shall be cleaned and leveled as directed by the Engineer. Excess slurry shall be disposed of by spreading in this layers on adjacent areas designated by the Engineer. No slurry shall be left in ponds,and all ponds shall be pumped dry and backfilled. 3.11 QUALITY CONTROL The Contractor shall maintain his own quality control for the cutoff wall construction under the direction of a qualified Engineer. Testing requirements are summarized in Table 1 and specified herein. 3.12 TRENCHING CONTINUITY AND KEY The Contractor shall be responsible for demonstrating to the satisfaction of the Engineer that the trench is continuous and keyed into the bedrock surface. Trench continuity shall be assured by the action of movement of the trench excavation equipment such that the digging tools can be passed vertically from top to bottom of the trench as well as moved horizontally along the axis of the trench without encountering unexcavated material. Penetration of the bottom of the trench into the bedrock shall be demonstrated by observation of the cuttings removed from the trench and the action of the excavating tools on the bedrock surface. 3.13 SLURRY AND BACKFILL Testing requirements for slurry and backfill are as follows(and are outlined in Table 1): A. Materials 1. Bentonite: Certification of compliance with the specifications shall be obtained from the material manufacturer. 2. Backfill Mix: Backfill material shall be tested prior to placement in the trench by conducting tests to determine slump and gradation. Testing frequency will be as directed by the Engineer with a minimum of one series of tests per 200 cubic yards of backfill material prepared for introduction in the trench or as specified in Table 1. B. Slurry Introduced in the Trench A complete series of tests shall be conducted on slurry from the pond containing slurry ready for introduction in the trench at least once per shift or each time a pond is prepared or as specified in Table 1. The tests shall include: pH of the slurry, Unit weight of the slurry, Filtration loss of the slurry,and Viscosity of the slurry. 4/08 Section 02168-Page 4 of 5 C. Slurry in the Trench Slurry in the trench shall be tested at least once per shift or as specified in Table 1. Samples shall be obtained from near the bottom of the trench near the point of trenching and tested for unit weight and sand content. END OF SECTION 4/08 Section 02168-Page 5 of 5 TABLE 1 Kirby-Dersham Pit Slurry Wall Lining Project Materials Quality Control Program SoiUBentonite Slurry Trench Cutoff Wall Subject Standard T Minimum J yp e o f Test Specified Values Frequency • Per 10 lineal Bottom Soundings --- • Trench Depth • Greater of design depth or 4 ft key feel • Per water Water • -pH • pH between 6.0&8.0 • -Total Hardness source or as • changes occur Hardness less than or equal to 200 ppm • Manufacturers certificate Additives --- of compliance with stated • One time • As approved by Engineer characteristics Material Bentonite API Std 13A • Manufacturers certificate • Each truck load • Premium grade sodium cation montomorillonite of compliance • 80 to 100%passing 2" • Selected soils obtained • Per borrow • 65 to 100%passing 3/8" Backfill Soils --- from a borrow area source or as • 40 to 85%passing#20 approved by the Engineer changes occur • >to 30%passing#200 • Roll to 1/8"thread • Unit Weight • Twice per shift • Unit weight? 1.03 gm/cc(64.27 pcf) Prepared for • Viscosity • placement into API Std 13BTwice per shift • V>40 sec-Marsh @ 68° the trench • Filtrate Loss • Once per shift • Loss<30 cc in 30 min.@ 100 psi • pH • Once per shift • pH>7&< 10 Slurry • Unit weight=1.03- 1.40 gm/cc(64.27—87.36 • Unit Weight • Twice per shift pcf) In Trench API Std 13B 1 • Viscosity • Twice per shift • V>40 sec-Marsh @ 68° • Filtrate Loss • Twice per shift • Loss<30 cc in 30 min.@ 100 psi • Sand Content • Twice per shift • Sand content≤20%by volume • Twice per shift • Unit Weight • >slurry in trench plus 15 pcf • Twice per shift • Slump • 2 to 6 inches Backfill Mix At Trench ASTM C-143 • Gradation • Once per shift • >_to 25%passing#200 sieve* • Triaxial Permeability Test • One per 1,500 • < 1 x le cm/sec If * Corrective action required if%passing#200 sieve falls below 30%. P:\0134 Hall Irwin Construction 013,1.025 Kirby-Dersham Pits Technical Specifications\Final Specifications\Materials Quality Control.tal.doc DIVISION 2-SITE WORK SECTION 02290-PLATFORM AND FILL AREA CONSTRUCTION PART 1-GENERAL 1.01 WORK INCLUDED Construction working platform for the slurry wall construction and other fill areas as shown on the drawings and specified herein,including foundation preparation,dewatering,fill placement,water content control,and compaction. This work is to be completed by the Owner prior to slurry wall construction. 1.02 RELATED WORK Section 02168-Slurry Wall Construction PART 2-MATERIALS 2.01 COMPACTED FILL Compacted fill shall consist of random inorganic mixtures of sandy,silty clays to clayey,silty sands. Fill material shall be classified SC,CL,SC-CL according to the Unified Soil Classification System. CH may be allowed upon approval by the engineer. The materials shall be obtained from excavations,borrow areas, or other sources. It shall be free of any deleterious materials,including materials larger than 5". Oversize rock fragments shall be wasted. All fill shall be in accordance with these specifications and shall be approved by the engineer. A. Temporary Construction Platform Fill Temporary Construction Platform Fill will be constructed of clayey soils meeting the following criteria: Sieve Size %Passing 5" 100 No.200 20- 100 The material shall be obtained from required excavations,borrow areas,stockpiles,or other sources as specified by the Engineer. The soils shall be free of any deleterious materials, including materials larger than 5",as specified by the Engineer. Oversize rock fragments shall be wasted as approved by the Engineer. 2/08 Section 02290-Page 1 of 4 B. Permanent Fill Permanent Fill shall be constructed on clayey soils meeting the following gradation: Sieve Size Percent Passing 5" 100 No.4 30-60 No.200 25—55 The material shall be obtained from required excavations,borrow areas,stockpiles,or other sources as specified by the Engineer. The soils shall be free of any deleterious materials, including materials larger than 5",as specified by the Engineer. Oversize rock fragments shall be wasted as approved by the Engineer. Soils classified as CH shall be used only when previously approved by the Engineer. 2.02 EMBANKMENT MATERIALS SUMMARY Minimum Placement Minimum Construction Unified Soils Class and Testing Testing Zone Requirements Compaction Requirements Interval Requirements Temporary CL,SC,CL-SC,CL-CH,CH Compacted to Density—No Testing No Testing Construction support Required Required Platform Fill 20%or greater passing the No. construction 200 sieve equipment Gradation,ASTM D422 Each 40,000 yds3 Permanent Fill CL,SC,SM,SC-SM,CL-ML 95%of ASTM Density by nuclear gage, Each 2,000 yds3 D698 ASTM D6938 (CH by prior engineering approval) Gradation,ASTM D422 Each 20,000 yds3 25%to 55%passing the No.200 Liquid Limits,ASTM sieve D4318 Each 20,000 yds3 No more than 70%retained on the No.4 sieve PART 3-EXECUTION 3.01 GENERAL The foundation for each section shall be dewatered,stripped,and suitably prepared. All cavities,depressions,and irregularities within the fill area shall be filled with compacted fill as specified above. A. Permanent Fill Weathered bedrock shall be removed a minimum depth of 12 inches or more to subject to approval by the engineer prior to fill placement in areas to receive permanent fill. 3.02 DEWATERING The Owner shall construct and maintain all necessary channels,flumes,drains,and related structures;furnish all equipment required to remove water from various parts of the work;and maintain Section 02290-Page 2 of 4 02/08 foundations and other parts of the work in a state of dryness so as not to impede work activities,become detrimental to related structures,or cause delays. The Owner shall provide the dewatering system,if required. The dewatering system shall assure that the adjacent facilities and any other work will not be damaged by dewatering operations. Dispose of the water in a suitable manner without damage to adjacent property or without being a menace to public health or without causing a public inconvenience or nuisance. The water shall not be drained into work completed or under construction. The dewatering operation shall continue until such time that it is safe to allow the water table to rise in the excavation. 3.03 PLACING EMBANKMENT MATERIALS No embankment material shall be placed in the fill area when either the material or the foundation or embankment on which it would be placed is frozen. No brush,roots,sod,or other perishable or unsuitable materials shall be placed in the embankment. If the surface of the prepared foundation or the compacted surface of any layer of earthfill is too dry or smooth to bond properly with the layer of material to be placed thereon,it shall be moistened and/or worked with harrow,scarifier,or other suitable equipment,in an approved manner to a sufficient depth to provide a satisfactory bonding surface before the next succeeding layer of earthfill material is placed. If the compacted surface of any layer of the earthfill in-place is too wet for proper compaction of the layer of earthfill material to be placed thereon,it shall be removed;allowed to dry;or be worked with harrow, scarifier,or other suitable equipment to reduce the water content to the required amount;and then it shall be recompacted before the next succeeding layer of earthfill material is placed. The earthfill on each side of any structures shall be kept at approximately the same level as the placing of the earthfill progresses,and the structures shall be protected against displacement or other damage. 3.04 WATER CONTENT AND DENSITY CONTROL A. Temporary Construction Platform Fill Material The Temporary Construction Platform Fill Material shall be compacted enough to support standard slurry wall construction equipment. B. Permanent Fill Material The Standard Optimum Water Content is defined as"that water content which will result in a maximum thy unit weight of the soil when subjected to the Standard Proctor Compaction Test as described by ASTM D-698." Material shall have in situ water content no greater than 2%below nor 3%above the standard optimum condition. Additional water as required may be applied by sprinkling. Each layer of earthfill material on the embankment shall be compacted as indicated in the section in which applies to the material being placed. During compaction,the placement water content and dry density of the earthfill shall be maintained within the control limits specified in each section. The water content of the earthfill material prior to and during compaction shall be distributed uniformly throughout each layer of the material. As far as practicable,the materials shall be brought to the proper water content by adding supplementary water,if required,to the material by sprinkling on the earthfill and each layer of earthfill shall be conditioned so that the water is 01/06 Section 02290-Page 3 of 4 uniform throughout the layer. Density control of compacted earthfill shall be such that the dry density of the compacted material shall conform to not less than 95%in areas to remain as permanent reservoir side slopes or fill areas which function as a structural part of the finished project. Material which does not meet these requirements will be rejected and shall be reworked until a dry density equal to or greater than these requirements is reached. 3.05 PLACING AND COMPACTING A. Compacted Fill The material shall be placed in areas shown on the plans in continuous and approximately horizontal layers,not more than 12"loose lifts. The combined excavation and placing operations shall be such that the materials will be sufficiently blended to secure the best practicable degree of compaction and stability. The material shall be compacted to the density required as determined by Standard Proctor testing as described in ASTM D-698. END OF SECTION Section 02290-Page 4 of 4 02/08 EXHIBIT F — RECLAMATION PLAN MAP The Reclamation Plan Map has been•revised to show a slurry wall around Phase 4. We have also included a map that shows the ultimate configuration of the water storage reservoir, which will include the Dersham property on Hall-Irwin's Parker-Dersham Resource(permit#M-2006-003). AMENDMENT TO BASELINE PERMIT#M-1997-058 • BASELINE Ld ROBERT L@ • RESOURCE YALERE A PARKER END OF MINE THROUGH EXISTING PAUL A& CARL F.MERCER SLURRY WALL TO CREATE RUM E. y A SINGE WATER STORAGE • $IRI1G( ___ -- TANK ' __. - _ --- RESE'V IR _ —X X X, ..—X--..7X v-_ EXi5TING ,1 - --- - - - - --- � - - DRIVE ; ,� ____ % t d L --� 1yT NOTES: I I, c 4 I �T TO - — e — 1. DURING SITE RECLAMATION,TOPSOIL SHALL BE SPREAD IN LIFTS NOT TO EXCEED 4 INCHES AND WORKED I rt >, x e i/� E OSPENG ion200 INTO THE SLOPES TO ENSURE GOOD ADHESION AND MINIMIZE SOIL CREEP. K P f (in FEET) 2. SOIL TEST MAY TAKE PLACE PRIOR TO RECLAMATION TO DETERMINE PROPER SOIL AMENDMENTS. -"' ,I - 3. LOCATION OF LANDSCAPE MATERIAL MAY BE AD7USTED TO BEST FIT SITE CONDITIONS FINAL LOCATIONS TO I J • $ 8E DETERMINED IN THE FIELD By OWNER'S REPRESENTATIVE IN CON3UNCTION WITH COUNTY STAFF. OIL/CAS 4. ALL LANDSCAPING SHALL MEET THE UTILITY CLEARANCE REQUIREMENTS. ' HELL LEGEND: 5. THE CONTRACTOR SHALL CALL FOR ALL UTILITY LOCATES AND FIELD VERIFY THE LOCATION OF ALL I - t WATER STORAGE I RESERVOIR AREA- f � 344 ACRES+/- / UNDERGROUND UTILITIES, (ON KIRBY PARCEL) }• "- EXISTING PERMIT AREA 6. ALL LANDSCAPE SHALL 6E INSTALLED CONSISTENT WITH XERISCAPE STANDARDS FOR INSTALLATION,SOIL �• PREPARATION AND IRRIGATION, I1 ----- SECTION LINE 1 ��ffff �. 7. ALL DISTURBED AREAS SHALL BE RESEEDED WITM THE SPECIFIED SEED MIX.ALL SEEDED AREAS SHALL BE Det Si SECTION CORNER RESEEDED AS NEEDED UNTIL WELL ESTABLISHED. SEEDING SHALL OCCUR BETWEEN NOVEMBER 1ST THROUGH ^ -, EXISTING FENCE APRIL 15TH IF POSSIBLE. ALL SEEDING SHOULD TAKE PLACE ON UNFROZEN.SOIL. I _ EXISTING TREES 8. SEEDING SHALL NOT BE PERMITTED WHEN WIND VELOCITY IS SUCH AS TO PREVENT UNIFORM SEED DISTRIBUTION. NO APPLICATION SHALL BE UNDERTAKEN DURING INCLEMENT WEATHER. - _ � 3:1 SLOPE - _UEXISTING GAS LINE MAX I 9. AREAS SEEDED WITH NATIVE GRASS SEED MIX SHALL BE MULCHED WITH CLEAN WEED FREE STRAW OR NATIVE r t - - et. � If -i EXISTING TELEPHONE LINE HAY. MULCH SHALL BE APPLIED AT A RATE OF 4,111 POUNDS PER ACRE. MULCH SHALL BE CRIMPED INTO THE„ ,',. nE INTD —_I— EXIBTING ELECTRIC LINESOIL TO ANCHOR IT: CRIMPING SHALL TAKE PLACE CROSS SLOPE WHERE POSSIBLE. Yi l., SLOPEG 1 EXISTING TELEPHONE PEDESTAL 10. GRASS SEED SHALLBoRIVENGJ / ( y ' LI BE DRILLED MECHANICALLY WITH A NATIVE GRASS DRILL EQUIPPED WITH AN AGITATOR ----� }j EXISTING WELL T .1.DRILL IN A MANNER § AND PRESS WHEELS. THE DRILL SHALL ALSO HAVE DEPTH BANDS ON SLOPES LESS THAN 3• I / 1 I THAT AFTER SURFACE IS RAKED AND ROLLED„SEED SHALL HAVE 1/4"TO 1/2"OF COVER. • �G' v / KIRAI E 1 Y 'I I�N < _ S o _7 c R EXISTING POWER POLE 11. BROADCAST SEEDING WILL BE PERMITTED ONLY ON SMALL AREAS NOT ACCESSIBLE TO MACHINE METHODS. lq - _" I I T ��II_�,, v3_ $ A ---- TOP OF POND FOR BROADCAST SEEDING,.SEEDING RATES SHALL BE DOUBLED. INSTALL HAY MULCH IMMEDIATELY AFTER . _ I. / § SEEDING. `a'!A •'lYil`\.,,,, n �' s+� III PROPOSED CONTOURS #' 12, SEED SHALL BE UNIFORMLY SOWN,ONE HALF THE SEED IN ONE DIRECTION AND ONE HALF THE SEED AT 60 '<A Row S H o _ SLURRY WALL RIGHT ANGLES TO THE FIRST SOWING,WHERE POSSIBLE. WHERE TOO NARROW TO ACCOMPLISH TWO - 70 Gz'SETBACK v DIRECTIONAL SOWING,SEED ONE HALF THE SEED FIRST SOWING IN ONE DIRECTION AND ONE HALF THE SEED,IN \ % _ y �. - --- -- - UNCHANGED MINE PHASE LIMBS THE SAME DIRECTION,WITH THE DRILL OFFSET MID-ROW OF FIRST SOWING. - EXISTING SLURRY WALL n 13. WATER SHALL BE APPLIED TO THE WORK AREA OR OTHER APPROPRIATE MEASURES SHALL BE TAKEN AS 6 Pi j N NECESSARY TO HELP CONTROL SOIL EROSION DURING WINDY CONDITIONS. 0 a I' - �',� )) 14. A MINIMUM.OF 10 INCHES OF TOPSOIL WILL BE SPREAD OVER ALL DISTURBED AREAS TO BE RESEEDED TO O JU _d MATCH SURROUNDING FINISH GRADE, m T,O A I+ILiI O D _� 2C 15. MOWING WILL BE PERFORMED FOLLOWING SEEDING TO HELP ESTABLISH NATIVE GRASSES AND CONTROL _ WEED INFESTATION. TEMPORARY a 7 H G D T7TI �, y I OD/75 16, TREES LISTED IN PLANT SCHEDULE SHALL BE PLANTED WITH LIKE SPECIES IN THE GROUPINGS SHOWN ON • Q % c • . START OF MINE THROUGH EXISTING STOCKPILES �I A m i= �'�^=� SLURRY WALL TO CREATE THE PLAN. PLANTS SHALL BE PLANTED IN THE QUANTITIES SHOWN IN THE PLANT SCHEDULE, p - - �• 4• A SINGE WATER STORAGE 17. ALL TREES SHALL BE SETBACK FROM THE SLURRY WALL A MINIMUM OF 30'. J e 11 RESERVOIR r v 't11 ! EXISTING - Its-..t- ` GROUND K x rA { RESERVOIR I P.YP. OD paII<. , C _...-------- ....... \ OB/TS STOCKPILE SIDESLOPE rNw. �P r \ WITH TREES 3H:1V SAND&GRAVEL LI FIS7TAL PROLE ` II SAND&GRAVEL I 1 SLURRY WALL 1,e er • Atlr �¢' FARMS r. l ._ '1 SARAH 1 It rf 9 '+✓ s...s,.-s,:- SE. II YARCOS CAPE& t muu1S___ 11. nut PQITZNI J L wW �� i�r. RESERVOIR DETAIL NOT TO SCALE ,T, r I EAST 168TH STREET 1 /BASELINE ROAD) - o NOTE: ao ADAMS CMAm THIS MAP WAS PREPARED BY CIVIL RESOURCES,LW IN COOPERATION WITH Z E HALL-IRWIN CORPORATION.THE EXACT CONFIGURATION DF THE MINING 0 _ PODS AND RECLAIMED PONDS MAY CHANGE TO RESPOND TO FIELD t^ • - a CONDITIONS.HALL-IRWIN WILL KEEP THE.DIVISION OF RECLAMATION AND ,e MINE SAFETY INFORMED OF ANY CHANGES THROUGH ANNUAL REPORTS AND _ S FILE TECHNICAL REVISIONS AND AMENDED APPLICATIONS AS NECESSARY - 3 THROUGHOUT THE LIFE OFTHE MINE HALL-IRWIN CORPORATION E REv1sLORS - AMENDMENT TO MLRB 112 PERMIT NO.M-1997-056 NO. DESCRIPTION DATE BY RECLAMATION PLAN 1 °ANNA ORTIZ CIVIL RE S�U R C E S,L L C P.D.Box 6BB FreaeaeK,m BD53D CIVIL RESOURCES,LLC 323 5th street 03 833 1416(p)303 833 2850(F) m DATE DRAWN B D BY: SUF S. JOB NO. DWG: T DATE; APRIL 2008 Kirby Amendment 040B08.tlxg SCALE: AS NOTED 13-0092_55.03 SHEET: CHECKED BY: DO 1 -� " "6 TR20'ENCH LEAH-IN S N. I �" "+,+ _. TRENCH �. -4 SUPPLEMENTAL FINES 4 25 MINIMUM �°' �'� "" �` _ GENERAL NOTES: pal g I SE78ACK FROM SUPPLEMENTAL FINES 1 DRY BENTONITE APPLIED AT 0.5% 1. SUPPLEMENTAL FINES MAY BE BORROWED FROM OVERBURDEN CLAYEY I WETLANDAREA p STATIONS SOILS ON THE INTERIOR OF THE SLURRY WALL. P ° —APPROXIMATE ALIGNMENT (CY/LF)1 (LBS/LF)1 \. WETLAND AREA i�A 2. ADDITIONAL SUPPLEMENTAL FINES MAY BE AVAILABLE FROM OTHER MINE - OF CONVEYER(TO BE REMOVED) N0+00 TO N20+00 1.9 CELLS AT THE WALKER PIT SITE, \ I R 6D 3. SEE TABLE ON THIS SHEET FOR SUPPLEMENTAL FINE AMOUNTS. {{ T s I N20+00 TO N32+23 1-5 55 4. TOPOGRAPHY BASED ON SURVEYING WORK BY PRECISION t 1 -- - _ _ S0+00TO S32+95 1,5 55 MEASUREMENTS,INC PERFORMED IN JANUARY 2008 MOUNTAINVIEW 1 i i 7 " ____- ____ I WATER EASEMENT INFORMATION IS BASEDON AN ALTA SURVEY I # p i� -. -) 1 _ -- - BASED ON 3,5-FOOT WIDE TRENCH. g° ( /r, '/ i -r`' - ..---.-- ----- -_____ PERFORMED BY CAROLL&LANGE IN 2005.THE LOCATION OF EXISITNG J, WALKER f l l / GAS AND WATER LINES HAVE NOT BEEN SURVEYED AND IS I APPROXIMATE EDGE OF I I LEGEND ' APPROXIMATELY LOCATED. EXACT LOCATION OF GAS AND WATER LINES RESERVOIR ,'; SILT PONDypyp NORTH CELL - _ _ ' l l - WILL NEED TO BE DETERMINED BY THOUUSING A VAC TRUCK -: _ 17-''',, , I SLURRYWALL PRIOR TO 0ONSTRGTION. POTHOLING I Ir 5 --------- EXISTING CONTOURS - 5, COORDINATE WORK THROUGH GAS COLLECTION FACILITY WITH GAS I I .5 I `INSTALL i,r' ',[ ' - g -"^ -- EXISTING SLURRYWALL COMPANY. REPLACE ALL FENCES,PROTECT EXISTING GAS LINES. I ILT.FENCE' i31' R900 !/ @ we OVERHEAD ELECTRIC 6. FINAL SLOPES ADJACENT TO SLURRY WALL ARE 3 5;1(H:V)FROM STATION %� i J 1. - g — �so BURIED GAS LINE N6+75 TO N+20100 AND COT AT 3:1(H:V)AT NO+OO TO N5+65&N20+62 TO �i 1 I 8 N32+23&S0+00 TO 533+35. ¢ PROPERTY LINE `iiC - \\\ ': I ₹ _r_- 7. 15'OFFSET WITH 3:1(H:V)SLOPE ONLY APPLIES TO CUT SLOPE IN NATIVE -- FENCE LINE I SAND&GRAVEL. 1 WATER LINE SLOP I II I `"` 8. SLOPE TRANSITIONS SHALL BE CONSTRUCTED OF NATIVE SAND AND TH-1 I / TRANSITION - $ — — — SECTION LINE I/ o GRAVEL MATERIALS. o�(SEE NOTE S) / ' ° q POWER POLES 9. TEMPORARY PLATFORM IS FOR CONVENIENCE OF CONTRACTORS GaE ANe g ,'1,,!,1,- 1 -a- TESTHOLES CONSTRUCTION OPERATION AND IS NOT MANDATORY FOR DESIGN EASEMENT . An b,.r) �••- I I - I _._ . TEMPORARY WORKING PLATFORM FUNCTIONALITY. j--[wv" r [ "'��MA�4k�/'r• (\ A >� / �ay , . \ \\ ! I - p' I I` I E µ I MANHOLES TO BE �� a N`Pa} F I J. I I -I On 1 Ii PROTECTED WITH \``� 3 LS,A /PROPOSED SLURRY WALL EXISTING ..- REINFORCED SILT FENCE \ 9 /✓ II / , EXISTING SLURRY WALL w FLARED 1., 20'LEAD-IN \ + END SECTION I \ , I D TRENCH \ - o 40'R.O.W.RESERVATION 12'METAL PIPE 15'MAP BARBED(111-,FENCE I -I Q�\. �I INS FALL STRUCTURAL \I \ `l\ I u,BE�-FnRL FEN.,' o. ,,,�, „� o - I_-( eh 'ICON AS NEEDED FOR J I 50m I 2 I .IMINING TRAFFIC ^ / Ivl ' --_ —_— .__—_ a— 1 _ —y r z, — •-__--1 I $ \I II I us o - s— _'',,..,.,5—"' Gs— �i 1 "3 '4;:F,11,' ! - - -- - APPROXIMATE GAS LINE LOCATION R r1s \ TH-T GARBED au'IRE FENCE D.,.wATER PIPELINE I� I EXISTING R.D.W. sFkfENT �.\ — — _ N Z _l_l I - - - _ MERIT ENERGY FLA G I� I I I WALKER PIT j K o ''','‘'l� [. I I — — r - - ` - _ 46'0 RCPd I' / I FINAL SLOPE CREST a : N TH-12 ,/....„- 1r , ,„,,,,•.,,.:"./ //'' FINAL SLOPE CREST A FUTURE 36"0-- 1 z ; n a$ 111 _ ,... PIPELINE T ' 151 KIRBY PIPE I _— _ — — I I (BY OTHERS) I I I,, gg, \ NN I\ ( I 1; FINAL SLOPE CREST(SLURRY \\h " �./WALL CONSTRUCTION PLATFORM) sF"BED:•iP=. °'__ .,.-� o I I SECTION LINE A.- I 7 (SEE NOTE 6) FINAL SLOPE CREST 15, o \ MANHOLES TO BE 1 / PROTECTED WITH MANHOL i Y` - _. 25' I ( \ KIRBY PIPE / Op.KaZs I..I `' , I REINFORCED SILT FENCE \I {.- I I Z (I } SLURRY WALL I-.I �,h )1 �-/CONSTRUCTION , G MIN 1 1 PLATFORM TOE CLEARANCE- fi \ ti I 1 NORTH#COR SEC 1 1.( `� yy FROM GASLINE j; 1 1 - t "'+ TIN,WY/.6TH P.M i IS MIN a PARKER PIT I' Q I I FOUND 3-1/9"ALUM �' z FINAL SLOPE CREST 25' 1 CLEARANCE CAP LS 1GR3T / I . ;ill:i2s FROM .._„ Yl / ca 3kRBE�1M19 EI•I�FrR100 rrGASLINE /', / r 1 I � 11-11 I 3-5_ I ! } N18472 16+93 TO STA. /�' 20'LEAD-IN 1G[ ) -TH-i _ 179,1 STRUCTURAL P ' TRENCH ,f \ O+Z N 99 Z N. SEAST 1 1) ' TO BE CONSTRUC ED BY 1 I I__ I -I.---._.�.- - - - - \) - I£ I PROPERTY I 1, ao - OTHERS THROU HGAe [ -' _ / ® < LINE I '\ COLLECTION ciuyF - m 1 FTH-32 3'1 CCC 20'LEAD-IN B y\ SEE NOTE �' - \ TRENCH ivmou TAI W i �I 7 ' WATER EASE T I' I u 1-I �/2 �,rJ• 25 T I I RECEPTION N: ccI :'`!''i :I I-.0—25' 15' I SPIGOT AND PUMP 1Ta323B I N , r TOP EDGE OFr COORDINATE REMOVAL I 10'MIN CLEA 4 ,_L II crzuD� ' TEMPORARY 75 £,) I OF CORRAL WITH FINAL SLOPE CREST �f '>; WORKING "! PROPERTY OWNS EXISTING STR TUREs H. FROM G255'. I-• E' 6 Rli FLAGGING 25` SPIGOT \ Ir p PLATFORM .� �' I _ 15' I ARE.-..,,Ji FLNCE r { II .I �� n ! _ , x ---- - FINAL SLOPE CREST ' - A-F :, / R il� STPJRSB 1 �� SLOE 7S � - - , la' NEW `n CATWALK) O TRANSITIONR : S -- I MERIT ENERGY I _ _.-.I,11:1-1 l e "(-Y - / - WATER EASEMeNT I' - (SEE NOT 8) l.;. r — _ l -_ .��' ..: 1�\., !. H I FLAGGING MERIH �AGGING 15 RECEPTION NO. -..,I« 1 < I /...- _ _ — MERIT ENEP.G, 4.. P rC 1;i43P39 RS = + BUIpIfiD GAS METER BOX vt' 2i ^� _ _ ,:..J :,9 �•C. " + �9FM j �I I } e r.:-�v_ ,>: ...._ __.- T-r_._ w r ;.r; � aI uu S�yu slniwu S.a+vu 7H-1 c 1 LINE MARKERS_.. / - - I b o MANHOLE --. .. _ _ _ _ _ _ _ _ r p -/.� _ .- I.... .. _I `I 1 2 _l — ._i � yr _—r =xi w� n-- [ —rZ - _w! .ri= �_� � [ • ..,..,. ....,',;,-,.. ..:;',.2-f..:1 ,--..: ..'—m—sys saa--..=.'17,r-1.- .. � � y. v2=sn sr - _ �_ —. F:JST,�G4TF',....- o -- .__ ---s' srs—sv� _— _._ t— '' _— WATERPUMP WELL __, `s., s6—". '—s"� 2JE..,-. L>..__ �.., t0, _ m: IX PNIN IN LOCATED O. ENERGY LAGGING P J .-._.... .. - YY -_-.- 22 -il. - ...- 'EDT MERIT � a - _,_- ---- ------ RESERVATION h CAUTION GASLINE PROPERTY LINE CAUTION OVERHEAD DRAFT ¢ CROSSING SEE NOTE 5 EXISTING R.O.W. \ ELECTRIC DE-ENERGIZE o EDGE OF ROAD AND/OR REMOVE LINE KIRBY-DERSHAM SLURRY WALLS REVISIONS SITE PLAN&SUPPLEMENTAL FINES TABLE I TE BY �Z DRAFT 2/I N0, DESCRIPTION AI/08 OC 2 FINAL FOR REVIEW 2/21/08 OC DEERE & A U L 1' 600 S HRPOW Rp.,BLGC.E.SBRE]GS L285:/II CO COWS 0 100 200 3 ADDED J6"0 EL 4/03/08 DG C ONS LLTAN TS.INC. TCL 503.451.1166 fax.)0).6511GO 4 PRELIMINARY SEAM DESIGN 4/18/08 SF DESIGNED BY: SP APPROVED BY: DWO JOB NO SHEET: Scale In Feet 5 BELOW GRADE STORAGE 5/2/06 SP DRAWN BY: IR DATE: 5/2/06 01}4.025.OD n CHECKED BY: CH SCALE: AS NOTED 2 Of 8 EXHIBIT L - RECLAMATION COSTS We request that the Division calculate the reclamation costs. AMENDMENT TO BASELINE PERMIT#M-1997-058 EXHIBIT Q - PROOF OF MAILING OF NOTICES TO COUNTY COMMISSIONERS AND SOIL CONSERVATION DISTRICT Copies of the return receipts for the certified mailings are attached below. U.S.Postal Service,. r CERTIFIED MAILTM RECEIPT (Domestic Mail Only;No Insurance Coverage Provided) fr1 F•r liv ryinf•rm ti• • . cr-1 • to P a ° '. 4kt- ru Postage $ � . 0 fU Certified Fee !y Postm Return Receipt Fee WAY 2 ,41 :' Here (Endorsement Required) O Restricted Delivery Fee Q (Endorsement Required) C Total Postage&Fees $ J ci Sent Tofray 1 0P �- in, V Min i.,, SR73ti ' t` 31reet,Apt o r—O t!X)x 7 cg or PO PO Box N No.. 1 O Cftl%Sta cX) 8,D(, 3 PS Form 3800,June.2002 See Reverse-for instructions-. U.S. Postal ServiceTM CERTIFIED MAILTM HECE:FT r g (Domestic Mail Only;No Insurance Coverage Provi-lect For delivery information visit o irwebsi.e +ww usps com® D-• t f A U1 ru Postage / Certified Fee s Return v Receipt Fee '! .o Hereare ar (Endorsement Required) O Restricted Delivery Fee p (Endorsement Reqused) rR C3 Total Postage&Fees r. w" Sent To ej f Conseivc,4oij l� treat,Apt: [ o ;b!yht y or PO Box No. ,� (�,,�'� CV,State, S F:rm 381 r Jur. 2112 Se 'avers for nstructi.ns' AMENDMENT TO BASELINE PERMIT#M-1997-058 EXHIBIT R — PROOF OF FILING WITH COUNTY CLERK AND RECORDER The receipt from the County Clerk and Recorder will be faxed to the DRMS. AMENDMENT TO BASELINE PERMIT#M-1997-058 EXHIBIT S - PERMANENT MAN-MADE STRUCTURES Please refer to the attached Stability Analysis prepared by Deere&Ault Consultants, Inc.dated April 18,2008. AMENDMENT TO BASELINE PERMIT#M-1997-058 DEERE & AULT CONSULTANTS,?I N C. April 18,2008 Mr. Dan Worden Hall-Irwin Corporation 301 Centennial Drive Milliken, Colorado 80543 Re: Stability Analysis,Kirby-Dersham Mine;D&A Job No.CG-0134.025.00 Dear Mr. Worden: A slope stability analysis was performed for the Kirby-Dersham Mine located in Weld County, Colorado. The purpose of this analysis was to investigate appropriate mining-highwall setback distances from a proposed slurry wall at the site. This analysis addresses areas where the slurry wall is to be installed along properties not controlled or owned by Hall-Irwin. Below we present a brief background and the results of our findings. BACKGROUND The site is located west of the South Platte River. Baseline Road(East 168th Avenue)forms the southern boundary. The Hall-Irwin Walker Pit bounds the site on the east,and Weld County Road (WCR)23.5 bounds the site on the west. The proposed gravel mine is to be mined with a highwall slope inclination of approximately 3:1 (horizontal to vertical). This mining slope will serve as the final reclamation slope. ANALYSIS Our stability analysis involved generating a computer model of limit equilibrium analysis using the Slope/W limit equilibrium computer program. The stratigraphy encountered during the September 2006 and November 2007 site investigations was used to develop the model. Frequently,sandy clay layers are encountered in the alluvial sand and gravel stratum. These layers are colloquially known as"mud lenses." Some mud lenses were encountered during the investigations of this site.These mud lenses were incorporated in the slope stability model. Two soil profiles were analyzed. The stratigraphy near TH-3,in the northwest area of the site, was used for a typical soil profile. This consisted of 1 foot of overburden overlain by 30 feet of alluvium. This alluvium had an intermediate,5 foot thick layer of mud lens located in the approximate middle of the deposit. Beneath the alluvium a layer of weathered bedrock was modeled. The bedrock encountered during drilling was generally competent; therefore,the weathered zone was modeled as only 1-foot thick. Underneath this weathered bedrock stronger bedrock was modeled using peak strength parameters. 600 S.Airport Road,Building A,Suite 205 Longmont,CO 80503 Phone: 303-651-1468 Fax: 303-651-1469 ANearnalysisTh-1 of Finished Mine Slope at Kirby-Dersham Pit DRMS parameters , Factor of Safety= 1.667 Alluvial Deposits Slurry Wall Backfill Unit Wt-Above Water Table:130 pcf Unit Wt.Above Water Table:110 pcf Unit Weight:137 pcf Unit Weight:122 pcf Phl:35• I Phi:1° Cohesion:0 psi yt Cohesion:0 psf Overburden Peak Strength Bedrock Unit Wt.Above Water Table:114 pcf Unit Wt.Above Water Table:124 pcf Unit Weight:126 pcf ' Unit Weight:134 pct Phi:23• 4 Phi:28• `"" Cohesion:100 psf Cohesion:100 psf Mud Lens Weathered Bedrock Unit Wt.Above Water Table:114 pcf Unit Wt.Above Water Table:124 pcf T. Unit Weight:126 pcf p l x a. Unit Weight:134 pcf Phi:28• r.<k '+1 Phi:14° Cohesion:50 psf l Cohesion:0 psf • [____15, 7 25' ,..- .^._, - 495 494 Alluvial Sand&Gravel _....ii N. - 4 93 ,il 492 _., �■,,,�i � � �n�n'r� E Alluvial Sand&Gravel ,n^, mt" d 4g1 C 4.90 - ska '''',',''';.1 489 I � 4.88 '.S ( a 4 7 �t ,. 5uEi..��.w....�e.,,azur.�iw+,,._3,vstr�.w,. ,., ,.. .A.-=,. ..c ......�� - �b...�...m_1,..,.....1-.,.,ec�uiu� -290 -220 -210 -200 -190 -1801 ir0 -100 -750 -140 uy -130 -12D xry 110w .a...10 -100 -90 J-BOyLL_...rv..-700050 -40 488 .,.vt...,.,.. ,�smw s...,aa„oe.w,.,,,......,.eR+r,a^n,�, coo b -30 -20 _10 0 70 20 Distance(it) Hello