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IRWIN/THOMAS MINE
<br /> NOTE:
<br /> A. WHERE UNDERGROUND ELECTRIC ` - -. _ LEGEND
<br /> CABLES THAT RUN NEAR THE PROJECT ..,�� _a
<br /> WORK AREA,THEY CANNOT BE
<br /> 0
<br /> SECTION LINE
<br /> DE-ENERGIZED FOR CROSSING �'v - - --, \ r II I 'qI� PERMIT BOUNDARY ■ ■ SLURRY WALL i
<br /> PURPOSES.THE CONTRACTOR MUST "- ''''•� 1 -"
<br /> _
<br /> _ 1'^ c � � '•3 - - � SEDIMENTATION SUMP
<br /> TAKE ALL PRECAUTION NECESSARY TO N F
<br /> O n
<br /> PREVENT DAMAGE TO THE CABLES OR - u
<br /> 1 x
<br /> INJURY TO THE CONSTRUCTION CREW. \ - Po'j i % EXISTING PARCELS TEMPORARY IN-PIT STOCKPILE AREAS S o
<br /> SHOULD THE CONTRACTOR DAMAGE i. '
<br /> THESE FACILITIES,CONTACT LONGMONT PERMIT I �T - ;�.. :, - - - EXISTING 5 FOOT CONTOUR -^��- 100 YR EFFECTIVE FLOOD PLANE
<br /> IMMEDIATELY AT 651-83386POWER& LONGMONT - BOUNDARY(TVP) 100'MINIMUM ROM E.'+ER I.,F k r : i�� - - - - EXISTING 25 FOOT CONTOUR ,gym_^--- 100 YR PRELIMINARY FLOOD PLANE
<br /> POWER&COMMUNICATIONS WILL V % BOULDER COUNTY y +I
<br /> REPAIR THE FACILITIES AND BILL THE • � MINING GENERAL INDUSTRI _- • EXISTING MONITORING WELL LOCATION -��- 100 YR PROPOSED FLOOD PLANE
<br /> DEVELOPER FOR ALL ASSOCIATED ,eP». - ..,-r /•• SETBACK /
<br /> COSTS.
<br /> B. WHERE LONGMONT POWER& '+ \ _.• 30'SEWER EASEMENT FOR SANITARY SEWER ; } ® BERMS
<br /> COMMUNICATIONS OVERHEAD I'} '�•••• \ TRUNK 9/INTERCEPFOR G.MINIMUM SETBAC. ,
<br /> FACILITIES EXIST IN THE DEVELOPMENT1 �••• •••• FROM SEWER LINE IS 10V TO MINING c ;
<br /> 50'BUFFER SE • '••• •• CELL10 -
<br /> IF
<br /> AREA THE CONTRACTOR MUST KEEP - • \ •••• '.\ / - -ALL EQUIPMENT OPERATION A MINIMUM NOTE 13 ON L~ • \�ACRES T-+.CO'MINIMUM - -_ NOTES
<br /> OF 10 FEET FROM EXISTING OVERHEAD THIS SHEET •�� : •�\ I 1.THE PROPOSED IRWIN/THOMAS MINE PERMIT AREA IS COMPRISED OF 4 DISTINCT MINING AREAS SEPARATED BY COLORADO HIGHWAY 119,ST.VRAIN CREEK,AND THE
<br /> ELECTRIC LINES.IF THIS IS NOT PERMIT • •• // \ BURLINGTON NORTHERN AND SANTA FE(BNSF)RAILROAD.MINING AREA 1(NiIS LOCATED SOUTH OF HWY 119,MINING AREA 2(MA2)IS NORTH OF HWY 119 AND •4
<br /> ••�••• • Sc'MINING C„ Pi
<br /> FEASIBLE,OR CONDITIONS WARRANT BOUNDARY(TYP CELL B ♦j • '• SETBACK 'gggV � SOUTH OF ST.VRAIN CREEK,MINING AREA 315 NORTH OF$T.VRAIN CREEK AND SOUTH OF THE BNSF RAILROAD,AND MINING AREA 415 NORTH OF THE RAILROAD.
<br /> ADDITIONAL PROTECTION OR POLE - -' 10.11 •••\ \••• .•• �:II,)Ir �. !: 2.THE PROPOSED PERMIT BOUNDARY ENCOMPASSES APPROXIMATELY 211.7 ACRES WITH ONLY ABOUT 129.1 ACRES CURRENTLY PANNED FOR MINING.HOWEVER,THE own BW
<br /> STABILIZATION,THE CONTRACTOR MUST SEDIMENTATION- < •••• / _
<br /> SUMP(TVP ACRES ♦ •••• •+� ` $, f - AFFECTED AND BOUNDARY ESSENTIALLY FOLLOWS THE PERMIT BOUNDARY TO ALLOW FOR RECLAMATION
<br /> CONTACT THE LPC OPERATIONS i- •� •• •• �_ m
<br /> SC MININ ••• •• • \ T jd- - � ARIVITI.AND FUTURE POTENTIAL MINING OPERAT ONS.AREAS NOT DISTURBED BY MINING MAY BE DISNRBED BY ACCESS ROADS,MATERIAL CONVEYING,
<br /> CONSTRUCTION COORDINATOR AT • - _ -_
<br /> c
<br /> • •• - ".v - R AND UTILITY flIGHT-OF-WRVS.
<br /> + � S�Tgp;;t _ • � _ - _ _ - �, .' _- _.�- � STOCKPILES,OR OTHER MINING REATEDACTIVITIES.THE REMAINING AREA WILL CONSIST AND ROAD BW
<br /> 651-8386.IT IS THE CONTRACTOR'S �'.;, \ - • -+.. _+'/
<br /> RESPONSIBILITY TO ARRANGE I •••••• \ Ct LL 9 ••• ••:` , �. 3 IN ADDITION TO AREAS DISTURBED BY MINING,ACCESS ROADS,MATERIAL CONVEYING,STOCKPILES,00.OTHER MINING RELATED ACTIVITIES MAY OCCUR IN AREAS NOT ry[
<br /> PROTECTIVE COVERING AND OR POLE i♦ ♦ 9.42 ACRES • \ �•• I SUBJECT TO MINING AND RIPARIAN SETBACKS AND BUFFERS.AREAS NOT DISTURBED BY MINING MAY BE DISTURBED BY ACCESS ROADS,MATERIAL CONVEYING, HUr� 1241.0001 DRMS
<br /> STABILIZATION,48 HOURS IN ADVANCE. .•. • 50'MINING L,,.., STOCKPILES,OR OTHER MINING RELATED ACTIVITIES.THE REMAINING AREA WILL CONSIST OF SETBACKS AND ROAD AND UTILITY RIGHT-OF-WAYS
<br /> ♦ ••• jj
<br /> SHOULD THE ELECTRIC FACILITIES BE 150'PERMR- ••�♦ • •• •• •• r•SFTBACK / - �•• ) SETBACKS FROM THE MINE PIT TOP OF SLOPE TO THE PROPOSED PERMIT BOUNDARY OR MAN-MADE STRURURESNOTOWNEDBY THE APPLICANT WILL BE 50 FEET OR
<br /> • • •••• _
<br /> SITE ENTRANCE-SEE NOTE 12 his.+
<br /> r•
<br /> DAMAGED.THE CONTRACTOR MUST SETBACK SO'MINING a `+•♦�1.,-�••.. •+ GREATER.
<br /> CONTACT-PC AT 651A386. SETBACK ii' `I {, �+ _ 1�' _..,.• • N. -X ` S.ITEMS OWNED BY THE APPLICANT OR PROPERTY OWNER LOCATED WITHIN THE PERMIT AREA SUCH AS UN-IMPROVED ROADS,IRRIGATION LATERALS,FENCES,WATER
<br /> ADDITIONALLY,ALL COSTS ASSOCIATED ST.VRABV GRF191WAY / /
<br /> WITH REPAIRS WILL BE THE = � V 80 DRAINAGE •••• WELLS AND ASSOCIATED PUMPS,AND OTHER STRUCTURES MAY BE REMOVED OR RELOCATED DURING MINING AND RECLAMATION.
<br /> ST.- �r. \ ••.••. .••\ / APPRO%(MATE LIX,ATION OF CONVENOR 1�,:: 777"'--"""" '
<br /> RESPONSIBILITY Of THE DEVELOPER. ���TRAIL 1 - RAIN CREFk EASEMENT . ••• �' TUNNEL-TO BE DESIGNED TO NOT IMPEDE USE '- -. 6.TEST PITS HAVE VERIFIED THAT COMMERCIAL DEPOSITS OF SAND AND GRAVEL EXIST UP TO 25 FEET BELOW THE SURFACE OF THE GROUND.
<br /> -�I GROUNDWATER '- OF GREENWAV AND SUBJECT TO APPROVAL • t
<br /> / ^'DISCHARGE TO CREEK "` `:"{"""� \.% ,'/ FROM THE CITY Of LONGMONT AND CDOT " /.MINING IS EXPECTED TO ENCOUNTER GROUNDWATER WITHIN FIVE FEET OF THE GROUND SURFACE.THE DEPOSIT WILL BE DRY MINED USING DEWATERING TRENCHES,
<br /> s x .••••• L - - I ADJACENT IN CREEK RIPARIAN A PRECAUTIONS WILL BE TAKEN T DISTURB THE REEK CHANNEL AND DESIRABLE VEGETATIO
<br /> ♦ ,..._.. -- " _ � 8 DURING MINING ADl C N(TO THE ST VRA C EE AREA,PREUU O 5 EN TO NO D S U C
<br /> PUMPS,SUMPS,&RECHARGE PONDS.
<br /> SETBACK �� CELL •• •••••• '3\ y ST.VRAIN _ ` 9.AMINE OFFICE/SGLE HOUSE TRAILER MAYBE ESTABLISHED NEAR SITE ENTRANCES BOTH NORTH AND SOUTH Of ST.VRAIN CREEK.
<br /> 4 I ?� N.
<br /> • CELL tu-� I 1088ACRES �'- /� GREENWAY �'^E�_ .`_ - M 1"1 III BEST MANAGEMENT PRACTICES WILL BE USED TO LIMIT DISCHARGE OF STORMWATER AND SEDIMENT ONTO ADJACENT PROPERTIES AND WATERWAYS
<br /> 3
<br /> -- P T !�-
<br /> 10.Ofi a,-,Y LARKING LOT -�___ 11.THE EXISTING HWY 119 ACCESS WILL CONTINUE TO FUNCTION FOR AGRICULTURE ACCESS AND MAINTENANCE,ONCE MINING AND RECLAMATION BEGIN,ACTIVITY
<br /> ACRES 13 i ZONE AE s A
<br /> r H lJ1'11 ' \\ g ST ASSOCIATED WITH THE HWY 119 ACCESS WILL INCLUDE BRINGING EQUIPMENT INTO THE SITE,THE EQUIPMENT OPERATORS VEHICLE,ANY REQUIRED MAINTENANCE OF
<br /> SEDIMENTATION ' ACCESS SEE PRq/N _'SCHARGE TO THE EQUIPMENT AND VEGETATION MANAGEMENT.MINED MATERIAL MAY BE TRANSPORTED VIA THE CONVEYOR AS SHOWN ON THE MINING PAN OR VIA HAUL
<br /> • ___
<br /> R T F MATERIAL FROM THE HWY 119
<br /> NOTE 11 THIS i `. \..q/.y F REF ('REEK -----_ TRUCKS UTILIZING DIRER ACCESS ONTO HWY 119 AT THE CONTROLLED INTERSECTION.SPECIFIC DETAILS REGARDING TRANSPORT O MA E
<br /> clm-nl 'r SUMP(TYP) • SHEET ! --_ • / H
<br /> ♦ / CR K
<br /> PERMIT r-: .. ••.... ...... .... ..•.•u.•o1 i ♦'••• \� F/YWq w• M _ _- // ACCESS OR VIAT ECONVEYORSHALL BE REVIEWED AND APPROVED BY CDOT AND THE CITY OF LONGMONT.
<br /> 1�'MININGr==' � -aPF� ♦♦♦ •<• - y i ✓� 2. ACCESS TO CELLS 8.9 AND 10 WILL BE VIA AN EXISTING ACCESS EASEMENT TO NORTH 119TH ST.SPECIFIC CONFIGURATION,REQUIRED IMPROVEMENTS AND AN
<br /> iDARV(TYR) SETBACK d+' ♦♦ ••.♦ �� �•-- APPROVED HAUL ROUTE TO BE APPROVED BY THE CITY PRIOR TO MINING THESE CELLS.THE OPERATOR WILL ENTER INTO A ROAD MAINTENANCE AGREEMENT WITH THE
<br /> --. w c+ ♦♦s•• CELL 1A •.•• �\` CITY PRIOR TO MINING THOSE CELLS.
<br /> PEI
<br /> rr�E.KEN PRATT BLVD. 11B) - _ ROI NnABV - -- ♦•• ACRES Y.
<br /> - 13.THE EXISTING SWALE ON THE WEST SIDE OF CELL 81S A MAJOR DRAINAGE CONVEYANCE AND DISCHARGE FOR THE WATER TREATMENT PANT.THE CHANNEL CANNOT
<br /> ` - _ ♦.•� 1D0' ••• 4 . .'h+ t BE IMPACTED AND MUST REMAIN OPERATIONAL AT ALL TIMES FIELD VERIFY PRIOR TO ANY MINING ACTIVITIES THAT THE 50'PROPOSED BUFFER IS ADEQUATE TO
<br /> MINING •" PROTECT THE EXISTING SWALE.AND IF IT 15 NOT,INCREASE THE BUFFER AMOUNT TO ENSURE PROPER OPERATION OF THE SWALE.
<br /> �/EX.SANITARV SEWER ��,•,,,��• • •, �'� SETBACK I v MINING SEQUENCE NOTES
<br /> L
<br /> 100 YR PRELIMINARY ') (1 •••ry.. i •r.+• a• . •♦' • 1.IN MAl,MINING CELL SA SHALL BE MINED FIRST MINING AND BACKfILL Of CELL LA SHALL OCCUR DURING THE NON-FLOOD PRONE SEASON OF OROBER THROUGH
<br /> FLOODPLAIN 1�. Jt i♦ I
<br /> f EX.STORM SEWER 20190930 FIRM 0801CO289K 1/� j MINING •• ZONE AE S••• 1 - APRIL.PRIOR TO MINING IN CELLS AND 3,CELL SA SHALL BE RACKFILLED.
<br /> ,� \\\ • • • Si AGINGAREA
<br /> ..•••'1
<br /> T • • 2.THE SCALE HOUSE AND STAGING AREA IN MA1 MAYBE ESTABLISHED ON THE MINED AND BACKFILLED AREA OF CELL IA.
<br /> `' ���r��• SETBACK y %� •�� ,
<br /> j "i \ CELL 3 �� i ; ALE HOUSE 3.IN MA2 AND MA3,THE AREAS OF THE MINING CLOSEST TO SF VRAIN CREEK SHALL BE MINED FIRST THE MINE CELLS WITHIN 200 FEET OF THE CREEK SHALL BE MINED W
<br /> I SEDIMENTATION 14 94 AND BACKFILLED DURING THE NON-FLOOD PRONE SEASON Of OROBER THROUGH APRIL Z•
<br /> s• • ACRES PERMIT
<br /> SUMP(TVP) ; W ;• ;♦ 4.PRIOR TO AFFECTING LAND WITHIN MA2,MA3 OR MI THE DIVISION OF RECLAMATION,MINING AND SAFETY(THE DIVISION)SHALL BE NOTIFIED IN WRITING.
<br /> EL
<br /> CELL 1 �� CELL 2�3 �• ♦ BOUNDARY♦ S.IF COMPLETED MINE CELL SCOFFS ARE TO BE WITHIN A RESERVOIR OR POND,THE DIVISION SHALL BE NOTIFIED FOR INSPECTION P0.10R TO FILLING THE i cC
<br /> ( ACRES ••/ 15.74 \��• ♦ RESERVOIN/POND WITH WATER V L
<br /> `• <
<br /> HARVEST j ACRES �: W ♦ POTENTIAL SLURRY WALL 6.IF SOILTESTING IS NECESSARY FOR RECLAMATION,TEST RESULTS AND ANY PROPOSED SOIL AMENDMENTS SHALL BE SUBMITTED TO THEDIVISION
<br /> JUNCTION •• �'Kr ENGINEERED DESIGN TO BE Q
<br /> i • i♦♦ 1.PRIOR TO MINING MA3 AND MI MONITORING WELLS SHALL BE INSTALLEDAND MONITORED FOR FIVE QUARTERS TO ESTABLISH BASELINE GROUND WATER
<br /> HIGH 50 MININ0.4ETBA 1 I i i ♦e•♦ AP PR�D TO DRMS FOR �.,= Z
<br /> 100 YR EFFECTIVE ELEVATIONS.
<br /> RESIDENTIAL (TYPN AL FOR I ,�+9 FLOODPLAIN i B.IF OFF SITE STRUCTURAL FILL IS TO BE IMPORTED,THE DIVISION SHALL BE NOTIFIED ACCORDING TO THE MINERAL RULES AND REGULATIONS RULE 3.1.5(9) O M
<br /> 1 HARVEST MOON 201 1218 FIRM 0801CO289J UNINCORPORATED a _
<br /> 'f y. ROW) i•• . •r .♦ •r BOl1LDER COUNTY 9.ATEMPOMRY ABOVE G0.0UNO FUEL STORAGE FACILITY MAY BE PACED IN MAI DURING MINING.
<br /> AGRICULTURE FLOOD PLAIN NOTES _
<br /> BONUS DITCH ALIGNMENT SITE V LOODPLAIN INFORMATION PER FIRM FLOOD INSURANCE RATE MAP N009013CO287J DATED DECEMBER 18,2012 AND FIRM FLOOD INSURANCE RATE MAP NO I 11 1
<br /> \ I ' ••�:. ENTRJWCE ;. 08013CO289J DATED DECEMBER 18,2012 Z w
<br /> 1 ••• •• •THIS PROPERTY LIES IN AREAS DETERMINED TO BE WITHIN ^
<br /> .t y • $` 11.18ALRES UICKSILVER RD -^ OTHER AREAS-AREAS OUTSIDE THE 2%ANNUAL CHANCE FLOOD 1.�
<br /> THIS AMENDMENT REMOVES TF-S �� ♦ - 8- '" ZONEX-AREAS OF 25%ANNUAL CHANCE OF FLOOD OR AREAS WITH I%ANNUAL CHANCE OF FLOOD WITH AVERAGE DEPTHS OF LESS THAN ONE FOOT OR WITHIN /Y
<br /> { PORTION OF THE PERMI'AREA _ F C�5 F'W w��- DRAINAGE AREAS LE55 THAN ONE SQUARE MILE AND AREAS PROTECTED BY LEVEES FROM THE 100 YEAR FLOOD. LL
<br /> •
<br /> FOR DEVELOPMENT IN THE CITY - - � 15.42 ACRES �_- ZONE AE-SPECIAL ROOD HAZARD AREAS SUBJECT TO INUNDATION BY THE 1%ANNUAL FLOOD CHANCE,BASE FLOOD ELEVATIONS DETERMINED.
<br /> OF LONGMONT 1 III it - nrA� •ZONE AH-SPECIAL FLOOD HAZARD AREAS SUBJECT TO INUNDATION BY THE 1%ANNUAL FLOOD CHANCE,FLOOD DEPTHS OF 1 TO 3 FEET,(USUALLY AREAS OI
<br /> '- 50'MINING PONDING)BASE FLOOD ELEVATIONS DETERMINED.
<br /> `�''� • SETBACK °UNINCORPORATED THE ADDITIONAL FLOODPLAINS SHOWN ARE BASED ON PRELIMINARY FEMA FIRM MAP 08013CO299K FROM SEPTEMBER 30,2019 AND LONGMONT'S APPEAL OF FEMA'S
<br /> BCULDERQ ••• COUNTY _. PRELIMINARY FIRM MAP.THESE MAPS ARE NOT FINAL AND ARE EXPECTED TO BE REVISED,THESE ARE SHOWN
<br /> 12
<br /> 5 AGRICULTURE TOR INFORMATIONAL PURPOSES ONLY. IF
<br /> D. \1 � • + VEGETATE SDE E T?B SH VEGETATE SIDE
<br /> TEMPORARY �1 FOR STABLRATION .FTAT ON 0H TOP FOR STABILIZATION OF THE BERM
<br /> IN-PIT STOCKPILE `` 1 \ 'y pr W I.
<br /> o HARVEST jl �O I -EXISTING - AREAS,TVP. . 3F 3
<br /> N ,'JUNCTION LOW "'
<br /> F
<br /> er DENSITY BONUS DITCH ` PERMIT
<br /> 'RESIDENTIAL N �' III LINORPO I_TED •' \ BOUNDARY(YP) Y Z _ TING ' -1 0
<br /> N z I BOULDER COUNTY
<br /> AGRICULTURE
<br /> - M GROUND
<br /> w
<br /> ivERPUF�=N GP
<br /> l t� II II EXISTING RURAL. • � W TOIECL
<br /> ��� - EXISTING RURAL • ,. 1
<br /> RESIDENTIAL '- K `
<br /> r � TYPICAL BERMING SECTION
<br /> LL
<br /> _QUAILBQAD- - v - . ....' " REM
<br /> 19 '\
<br /> ->r \
<br /> UNINCORPORATED
<br /> N BOULDER COUNTY
<br /> AGRICULTURE .,• -+•: _ $` ;g o
<br /> 1.
<br /> r �- O MINING
<br /> rsr.lric
<br /> �„ x `,•-,: '` !_.., ''` OVERBURDEN m HIGHWALL�HA CONSULTING 8sENGINEERS
<br /> TOP SOIL a:
<br /> SP
<br /> / (-\��\\��� 20' 23' 0.5' PH...♦r 970.226.0557
<br /> J p
<br /> AGGREGATE �1 1241.0001.02
<br /> GROUND
<br /> MINING ROCK
<br /> 0 150 300' 60D' w¢DECEMBER 2022
<br /> 8 NORTH SCALE:1'=300 0"
<br /> TYPICAL MINING SECTION sRLLT
<br /> AT PERMIT BOUNDARY 4 of 5
<br /> R.
<br />
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