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UFFII F. C" THF. RL•'G[UNAL DIRECTOR <br />- ,, <br /><: .. . <br />WE$Ztn~J . ~vY~ CtinBQN. I;dC <br />~.:.. <br />2 1 -~ <br />Al Amundson <br />Western Slope Carbon, Inc. <br />P.U. Box 1526 <br />Sam[ Lake City, L'T 84110 <br />De.tr llr. Amundson: <br />We have reviewed Western Slopz Carbon's (flSC) requests for approval of the <br />Following: an extension of mining 13:'0 feet into Federal Coal Lease ?7103 <br />(see a[tauhment I); construction of a sediment pond [o control runoff on thu <br />East Mine; construction of a coal vash plant and implementation of an <br />underground waste disposal syst~r~. After consultation, with Colorado Division <br />of 'fined Land Reclamation, the 3ureau of Land :IanaRement, and the U.S. <br />Geological Survey, we give our appcovil ro the prup,:sals provided chat <br />• standard and special stipulations (Attachment I•L) are accepted in writing _nd <br />vet according co the time scSedule lister. This approval is being granted <br />prior to corple[io~t uE tl~e ana'_vsis of the entire East Leas? due [o the <br />Dopa r ment's concern that current mi::inr not 'r. unduly restricted and chat <br />approved sediment controls and aas[e dl~~nsal he implementzd while r.he mining <br />and reclamation plan for the entire East Lease permit application is being <br />cur~pleted by tJSC. <br />I am especially concerned that WSC has n-~t pn;vi~ied anv information necessary <br />[.~ evaluate the eftecC of the pr~l,osod f.]SC Lease r..i.ning on the gruur.d water <br />system in the Eas[ Lease area. T;~Is is Inc of the most important faCCOrS In <br />evaluating ;,our proposal cu mina the rem]Lndo.r of the East Lease. OS?! and <br />C>1LR jointly indtcated their concern to 'JSC ab~~ut the lack of information un <br />the ground •aatet system as early as '~ove.nher 6, 1979. And, tJSC first pro^osed <br />the lnsta.llation of a ground w,iter munirorin .+ell in response [o [he OS>t and <br />C`fLR concerns of L'euember 7, 1979 (response rucaivcd by QS2f .lanuary 29-~ <br />1979). To dace, cols office has not n calved any additional ground water <br />information.. Therzfore, a stlpulatlun with respect to gro~utd water mcnicorin~ <br />dud submission of coLlac[ed data is nec,-ssary. lmplicl[ [n this approval is <br />the assumption that the proposed ground w.]rer monitoring we1.1 will be drilled <br />immediately and information fruu pump rc.st~. on the well suhmitted to the <br />regulatory authority in a timely manner. <br /> <br />'f he staff review of the proposed Eas[ Mlne sediment pond has Found the design <br />.:alculations Inadequate. The modal emnloy~d by WSC was designed by the SCS <br />rut use in calculating emer3enuy sp'_11•+t}• sfte and free hoard In Jams. Cling <br />the SCS-TR-SS method, QSM e9CimareS [ha[ pcnk floes in the !last )fine nran are <br />United States Department of the Interi~t•~-_.; <br />OFFICE OF SI'ItFACE !\tiNING ~~"!~-' <br />~r;~, ... <br />Reclamation and F;nfnrcen~rnt ~' ~..-- <br />10?0 tSTH :'fRLI T <br />DENVLR,C(~LOKAD(i 3U'U'_ ~ ' <br /> <br />