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HomeMy WebLinkAbout1.27 Phasing narrative and graphics Appendix QWSA -BLUE PIT EXPANSION 2012 [Appendix Q] PHASING NARRATIVE AND GRAPHICS DESCRIPTION /DETAILS: This section provides information pertaining to the phasing of the Blue Pit with respect to the phasing of the recently approved Cerise Mine next door. THIS SECTION INCLUDES: • This information is from the Technical Completion Process Exhibit N: Phasing Graphic Narrative Existing Conditions The existing Blue Pit is located approximately 2.5 miles east of Carbondale, CO on Highway 82. The Blue Pit is separated from the Roaring Fork River Valley by an 80' tall natural slope which remains after removing the .gravel from an elevated alluvial terrace. The site has been mined since 1981 under the state Reclamation Permit # M- 1981 -207. Western Slope Aggregate has operated the 82.70 acre site since 1991. Approximately 21 acres remain to be mined of the existing site. Table N -1 illustrates the relative tonnages of each phase. Over the 36 months after an approval is granted, 140 trees will be planted in conjunction with a 5' tall berrn just inside the Northern permit boundary. This will provide a visual buffer that will have ample time to grow and become even more affective as time goes on. 81.29 6,167, 000 15.4 25.58 5,570,000 13.9 3 20.74 3,978,000 9.9 4 8.62 2,654,000 6.6 The timeline stated is based on approximately 400,000 Tons a year in sales. Market conditions will impact this estimate. It is anticipated that over the next few years, Lafarge will commence the construction of the improvements documented in their application such as: construction of the entry road, stripping of 20, to 30 acres, construction of ISM systems and construction of the large . berms that border the North side of the Mining permit. It is the opinion of the applicant that during these activities the greatest amount of dust and disturbance is anticipated as the stripping operations cover a large surface area, a large quantity of material will need to be handled, conditioned and moved, and the berms are to be constructed relatively near the Southern most neighboring residences. Phase 1 Phase 1 consists primarily of the existing 1981 permit with minimal additional expansion area. The expansion area is required to provide additional overburden material for the continuous reclamation of the Southern slope which commences when the pit face reaches the existing location of the Basin Ditch. The existing location of the screening spread and the cone crusher will remain in this area in order shield it from view as well as mitigate noise, dust and vibration.. The space requirement for keeping the equipment .where it is precludes the applicant from performing reclamation activities any further East of the Basin Ditch., During Phase 1 the Basin ditch will also be relocated to the Western border of the Blue ranch in order to provide a future un- interrupted flow as required. As outlined in Table N -1, Phase 1 Exhibit 2 -N Phasing Study Page 1 consists of approximately 6,176,000 tons of gravel and is anticipated to take +1 -15 years to complete the mining as illustrated. During Phase 1, the progression of the mining face will begin to move North as the Western moving face reaches the existing 1981 permit boundary. It is anticipated that sometime during the mining of Phase 1, the Lafarge operations on the Cerise Property will be completed and Reclamation will begin. This assumption is based on the relative size of the Cerise deposit as noted in the Lafarge application, which appears to be approximately 6,000,000 Tons. Market conditions could obviously affect this assumption. Phase 2 Phase 2 is the first major entry into the expansion area and consists of approximately 5,570,000 tons of material. Phase 2 illustrates how the mining plan has been designed to allow the overburden material located on the North side to be used for reclamation of both the North and South sides as the pit moves Westward. The mining sequentially moves West then North continuously in order to maintain the "reclaim as you go" standard as well as provide the maximum visual mitigation. It is anticipated that Phase 2 will take approximately 13.9 years to complete. It is likely that by the time the applicant begins mining Phase 2, the Cerise mine will be fully reclaimed. Phase 3 Phase 3 finishes the Westward movement of the mine face so that the South Face can be mostly reclaimed with exception of the corner where the reclaimed West Slope will intersect it. This phase consists of approximately 3,978,000 tons of material and will take approximately 9.9 years to complete. Phase 4 Phase 4 consists of the final mining sequence that moves North to mine the final 2,654,000 tons of material as well as the final reclamation of the expansion area back to irrigated pasture and rangeland slopes. The portion of the "existing conditions" where the screen plant, cone crusher, the wash plant and stockpiles are currently located will remain as is to allow for the processing of the final quantities of material mined from the expansion area as well as for processing of materials for the readymix operation. Summary The mining sequences were carefully designed to mitigate visual disturbance to the surrounding neighbors through continuous reclamation of the slopes. The area that defines the expansion plan is designed to allow for practical use of agricultural watering devices, such as water wheels, after reclamation. The size of the floor is also important to create a space that is practical to grow in. This plan also noise and vibration through the operation of the plants at a level that is nearly 80' to 100' below the surface. Dust is mitigated -through the operation of the plants below grade as well as adherence to and documentation of.a strict watering schedule to water roads as well as stockpiles that are within reach. The exhibit labeled "Visual Mitigation Study" also explores the different phases, the Exhibit 2-N Phasing Study Page 2 view plane as seen from the neighboring Wooden Deer subdivision as well as the relative distances from the pit to some of the neighboring houses. Exhibit 2 -N Phasing Study Page 3 Exhibit 2 -N: Phasing Graphic: Existing Conditions WOODEN DEER NEIGHBORHOOD �`� I r • • Q C N• +�r CONSERVATION CONSERVATION EASEMENT EASEMENT • Permitted Cerise Mine 1 v � STOCKPILES' co rn N E > -1 I en ?ric� z1— "t! .7, s }(trek" 71 r... ew41 s� C. j Q}}: .. it-T. . .. • RANCH. ' .. ��%r.+ .• AT . mot +' 11i. ROARING FORK Blue Pit • - Existing Conditions v /��, _° /"*"..,.may. .. -- " STATE NIGywAy g r 1 � � .t "ilk, •x"`+1 1." . F Exhibit 2-N: Phasing Graphic: Phase 1 WOODEN DEER ROAD •■■4 • --' fit' • , a' CO N SE RVATIO EASEMENT TREES PLANTED CO NSERVATION EASEMENT PRIOR TO EXPANS1 lb REAlln NED ROAD Cerise Mine Phase 3 014. KIt' 01114` 00C1 -- ,01.81 r-... CD rn I ;11 1' 111 0 1 ACME MINE LA c AREA RECLAIMED sLor;E • z 1 IN I [RM SEED MR__ ..0 - -- CON PLANT Blue Pit Phase 1 Nub, Ulf • 441(A'Pf , - 41,,i1 —i ,p..;,L •e 4r• .nv,...„ .4141111' -,,,,,, 4.•• AR 1: RANCH' -.. r..' - r 4::,.f '4,,,..., k • AT . it. , r .. ' jr 1 .• . . - ;V . ST4TE riGH WA atz Exhibit 2 -N: Phasing Graphic: Phase 2 111OOGEAL aE.ER.' d ',t • 7 CONSERVATION EASEMENT CONSERVATION EASEMENT TREES PLANTED ":;_ ° PRIDR TO EYPAN I�! • '4 f REALIGNED ROAD r�[ — .PRIMIARY ,0,,- CR ISHLR tt'°' 1 P.0 µ I SYOCI{PILES Cerise Mine Po Reclaimed EXISTING SLOPE SCRLLN RECLAIMED SLOPE RANGELAND SEED NIA OFFICE EXISItNG SLOPE PLAN Blue Pit Phase 2 �, STATE pij .��+ -4,v ' a RANCH �.° -r AT + .t' f. ROARING FORK.` iyr Exhibit 2 -N: Phasing Graphic: Phase 3 R ROAD CONSERVATION EASEMENT ' PRIORT° EXPAN I F Ir, ARY CRUSHER OFFICE EXISTIlkG.SLWE a.d Blue Pit Phase 3 Exhibit 2 -N: Phasing Graphic: Phase 4 CONSERVATION EASEMENT ERVATION EASEMENT TREES PLANTED PRIG R TO EX PA N S REALIGNED;ROAD '4 -$ f. 1' s - RECLAIMED SLOPE: 1j NIELAN I SEED MIK r ,-. CSC _ .3, I v IRR MATED PASTURE.34.63ACRES i =1 Cerise Mine Reclaimed Blue Pit Phase 4: Reclaimed Exhibit N: Phasing Graphic Narrative Existing Conditions The existing Blue Pit is located approximately 2.5 miles east of Carbondale, CO on Highway 82. The Blue Pit is separated from the Roaring Fork River Valley by an 80' tall natural slope which remains after removing the gravel from an elevated alluvial terrace. The site has been mined since 1981 under the state Reclamation Permit # M- 1981 -207. Western Slope Aggregate has operated the 82.70 acre site since 1991. Approximately 21 acres remain to be mined of the existing site. Table N -1 illustrates the relative tonnages of each phase. Over the 36 months after an approval is granted, 140 trees will be planted in conjunction with a 5' tall berm just inside the Northern permit boundary. This will provide a visual buffer that will have ample time to grow and become even more affective as time goes on. Table N -1 Phase Acreage Tonnage Timeline (years) 1 81.29 6,167,000 15.4 2 25.58 5,570,000 13.9 3 20.74 3,978,000 9.9 4 8.62 2,654,000 6.6 Totals 136.23 18,369,000 45.9 The timeline stated is based on approximately 400,000 Tons a year in sales. Market conditions will impact this estimate. It is anticipated that over the next few years, Lafarge will commence the construction of the improvements documented in their application such as: construction of the entry road, stripping of 20 to 30 acres, construction of ISDS systems and construction of the large berms that border the North side of the Mining permit. It is the opinion of the applicant that during these activities the greatest amount of dust and disturbance is anticipated as the stripping operations cover a large surface area, a large quantity of material will need to be handled, conditioned and moved, and the berms are to be constructed relatively near the Southern most neighboring residences. Phase 1 Phase 1 consists primarily of the existing 1981 permit with minimal additional expansion area. The expansion area is required to provide additional overburden material for the continuous reclamation of the Southern slope which commences when the pit face reaches the existing location of the Basin Ditch. The existing location of the screening spread and the cone crusher will remain in this area in order shield it from view as well as mitigate noise, dust and vibration. The space requirement for keeping the equipment where it is precludes the applicant from performing reclamation activities any further East of the Basin Ditch. During Phase 1 the Basin ditch will also be relocated to the Western border of the Blue ranch in order to provide a future un- interrupted flow as required. As outlined in Table N -1, Phase 1 Exhibit 2 -N Phasing Study Page 1 consists of approximately 6,176,000 tons of gravel and is anticipated to take +/- 15 years to complete the mining as illustrated. During Phase 1, the progression of the mining face will begin to move North as the Western moving face reaches the existing 1981 permit boundary. It is anticipated that sometime during the mining of Phase 1, the Lafarge operations on the Cerise Property will be completed and Reclamation will begin. This assumption is based on the relative size of the Cerise deposit as noted in the Lafarge application, which appears to be approximately 6,000,000 Tons. Market conditions could obviously affect this assumption. Phase 2 Phase 2 is the first major entry into the expansion area and consists of approximately 5,570,000 tons of material. Phase 2 illustrates how the mining plan has been designed to allow the overburden material located on the North side to be used for reclamation of both the North and South sides as the pit moves Westward. The mining sequentially moves West then North continuously in order to maintain the "reclaim as you go" standard as well as provide the maximum visual mitigation. It is anticipated that Phase 2 will take approximately 13.9 years to complete. It is likely that by the time the applicant begins mining Phase 2, the Cerise mine will be fully reclaimed. Phase 3 Phase 3 finishes the Westward movement of the mine face so that the South Face can be mostly reclaimed with exception of the corner where the reclaimed West Slope will intersect it. This phase consists of approximately 3,978,000 tons of material and will take approximately 9.9 years to complete. Phase 4 Phase 4 consists of the final mining sequence that moves North to mine the final 2,654,000 tons of material as well as the final reclamation of the expansion area back to irrigated pasture and rangeland slopes. The portion of the "existing conditions" where the screen plant, cone crusher, the wash plant and stockpiles are currently located will remain as is to allow for the processing of the final quantities of material mined from the expansion area as well as for processing of materials for the readymix operation. Summary The mining sequences were carefully designed to mitigate visual disturbance to the surrounding neighbors through continuous reclamation of the slopes. The area that defines the expansion plan is designed to allow for practical use of agricultural watering devices, such as water wheels, after reclamation. The size of the floor is also important to create a space that is practical to grow in. This plan also mitigates noise and vibration through the operation of the plants at a level that is nearly 80' to 100' below the surface. Dust is mitigated through the operation of the plants below grade as well as adherence to and documentation of a strict watering schedule to water roads as well as stockpiles that are within reach. The exhibit labeled "Visual Mitigation Study" also explores the different phases, the Exhibit 2 -N Phasing Study Page 2 view plane as seen from the neighboring Wooden Deer subdivision as well as the relative distances from the pit to some of the neighboring houses. Exhibit 2 -N Phasing Study Page 3 Exhibit 2-N: Phasing Graphic: Existing Conditions WOODEN DEER NEIGHBORHOOD • • • f ‘:‘ 1 4142:4 CONSERVATION EASEMENT 6v AO Ma-34 JA; CONSERVATION EASEMENT pPermitted Cerise Mine STOCKPILES .:\ ■ ■illi 'lab dm. ider'lair aill...1 ,_,1■.il- -'.' 1,-. ,•...,,,... ::,;:t.., ---:... , ._ __. . ,.....„., ...:‘ . . --- - - EXISTING SLOPE SCREEN' PLANT ----',,PRITVIARY CRUSHER --- —CC-TV—JCR STING SLOPE PLANT ,, t'4 FFIC ft a. Blue Pit Existing Conditions • arm •• vivr TA N. TE HiGHWAY 82 RANCH "•■'' ta. AT A.g.• , k. VI: Sr,. 4' '4441. • . ROARING FORK ar's T Ir a • • rts. Exhibit 2 -N: Phasing Graphic: Phase 1 WOODEN DEER ROAD •i ltd CONSERVATION EASEMENT ' CONSERVATION EASEMENT REALIGNED ROAD ■• oo I r 0o I ,> >� No Po 31 I STOCKPILES O ACTIVE MINE w G AREA RECLAIMED SLOPE: 21 INTERIM SEED MIX _ _ OFFICE _ EXISTING SLOPE '-ter .at • PRIMARY CRUSHER SCREEN PLANT +rt .i� � P • Blue Pit Phase 1 Y . RANCH'' ■• t , AT �a ROARING FORK • AY 82 • _. i Exhibit 2-N: Phasing Graphic: Phase 2 • . • . • ; WOODEN DEER:Ft0AD ••• o 4 • 4Z. 4 • ttitki.0.1" , t 41+ ,• • " ••• f+1!* e • CONSERVATION EASEMENT REALIGNED ROAD CONSERVATION EASEMENT TREES PLANTED \ PRIOR TO EXPANSI r ,—PRIMARY Lc. 1 STOCKPILES 4t.„ Cerise Mine Reclaimed co ;12 I Jfr SCREEN'. V. rt 1 ,,.. ii. 4 *--2±... ?,.. iefli PLANT grn zs I RECLAIMED SLOPE: - -c-- •„...., 1 RANGELAND SEED MIX ' ■ 1 2-r . , ••• •■••• • EXISTING SLOPE 1•1 4, ...A.., • 411k- • , --- . . t ... .., . I '', ' V . lk -A—.•_,.._ "r•-• ., _ - -, .4,,,. '.• -,4-',',:ltit-,ti, , ...,-,-1 . ' ; - ..',.4f, .4i°-. - . .. li• ••• ' •••41 . • " . 4 - .. J I ' . 1 • •••• . - - / ' 1. 1 • . y; Blue Pit Phase 2 411 40-#0 • •••• ',it • ck„ - . , STATE „ iGt-ii4„Ay • s. ROARING FORK RANO4 . (** ttf..):71"Pt ‘' 4'1^ vtimi0 1ft,- 460 •ti Zitt‘ Exhibit 2 -N: Phasing Graphic: Phase3 WOODEN D€ €R ROAD CONSERVATION EASEMENT _0SFfp AF' r:`'•• p„ ,z� k STOCKPILES ' Cerise Mine 1' Reclaimed EXISTING SLOPE s SCREEN ' S"'w t PLANT RECLAIMED SLOP €. L -` z , . I UyGEL#ND SLED MI*'. -{.g 1 OFFICE _ 'PASTING SLOPE r r Blue Pit Phase 3 • F. —Ts.. RANCH a- • AT •�� ROARING FORK i'9 Aer 1 / • - NIGWgy 82 ! 1 Exhibit 2-N: Phasing Graphic: Phase 4 1:111rit a • , • ott•,, • $ WOODEN DEER ROAD 2 • _..,. 11111011 , ■ i 1 CONSERVATION ‘. EASEMENT CONSERVATION EASEMENT IRRIGATED PASTURE: 34.63 AC Blue Pit Phase 4: Reclaimed • t * • ; r16.7-1.4!...fr r•••."Si_ 01. , • . •11.6, • 'y •2Ze f• .4 v'29,44; 40' •, -40t. . .. - RAN CH 1111 40', . 41, .4• T.,t,:' y.:.r.zi", („1,..:.&* - ROARING FORK qii . ...de . V .1.11111W AT kor • . firv. • s TATE HIGH wAy 8,