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tY. .45sessment of Probable Hydrologic Consequences of Mining and <br />ative Hydrologic Impacts - Rules 2.95.6(3) and 2.O7.fi(2)(c) <br />"his Cumulative Hydrologic Impact Study (CRIB) for a portion or the <br />!amps River basin has been prepared by the Colorado Minetl Lana Reclamation <br />Division (CMLRD) pursuant to Rule 2.07.6(2)(c). This CHIS assesses the <br />projected cumulative hydrologic imoacts r ail anticipat?c Wining operations <br />in the general area of the Seneca II-W surf ac? mine. the cumulativE impacts <br />include both surface and ground water imoacts, however, the general area as <br />d?pined for surface and ground water basins do not coincide. The surface <br />w3tef generdi dr23 includes the CURIU ~dt''/e ?ff eCti Of dntiClpdt?d mining In <br />the upper Yampd River Bdsln to Hayden, Colorado (52e Flgur? NC. ?). M1ne5 <br />iCCitc7 in L,ni$ dr23 dndtnCiuded In the :.UmUldtlve Hydrologic i.mDaCt 3C31~/Sis <br />include (s?? Figure No. 3): <br />1) Sunland Mining Corporation - Apex No. 2 Mine, CMLRD Permit No. C-81-011 <br />2> Pittsburg and Midway Coal Company - Edna Mine, CMLRD Permit No. C-i30-001 <br />3> Colorado Yampa Coal Company (CYCC> - Energy Mine Nc. 1 and No. 2, and the <br />Ec<:man Park Mine „ CMLRD Permit Nc. C-79-177 <br />1) rplorado Yampa Coal Company (C'tCC) - Energy Hine Nc. 3, CMLRD File No. <br />C-8»-062 <br />~) Twentymile Coal Company - Foide' Creek Mine, CMLRD P?rmit No. C-92-056 <br />6) Peabody Coal Company - Seneca II Mine, CMLRD Permit Nc. C-20-005 <br />7) Peabody Ceal Company - Seneca II-W Mine, CMLRD Permit Nc. C-32-057 <br />3) Sun Coal Comoanv - Meadows Nc. 1 Mine, :HERO Filz Nc. C-3'-G29 <br />9> Rockcastle Company - Grassy Gap Coal Mine Ne. I, CMLRD Permit No. C-31-039 <br />10) Colowyo Coal Company - Hayden Gulch Mine, CMLRD Permit No. C-80-003 <br />Structural basins strongly influence the direction of ground water flow in <br />contiguous regional aquifers and thus, these basins define the limits of the <br />area considered hydrogeologically adjacent. The Se^eca II-W Mine fifes on the <br />ne$te r^ frank Of the $dge Creek An tlCline, a mi nCf OJmpCne~t pf the re ^yi0nal <br />Banc aasn Ground Water 'oasin. Due to strJrural limitations and the size of <br />t"? Sand Wash edi~n, CUmUldtlVe 1mp3C`.i 'w'tn adjdtent ml:nes '.4111 .nCL OCCUr. <br />Further diiCU55~On Or this iS included :n !dt?!' pCftlOn^, Qf this ;eCt1Cn. <br />'4ining Operati0n5 InC1Ud°_ both SUYfdC? intl Unde~gfvUntl mining op2'at'v'ni. Ali <br />nines listed are currently permitted operations. CYCC'S Enerq;i Mines Nos. 1, <br />?, and 3, Eckman ?ark Mine, Rockcastle Comodnv's Grassy Gap Coax Mine, <br />Sun goal Comeanv's Meadows .VC. 1 Mine, and Colowyo Cca' Compdry's Hayden Gulch <br />Mine are currently in phases of reclamat:cn only. Fcioel Cr?Ek ar.d Ape+ Ne. 2 <br />are unperground mines. <br />-23- <br />