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<br />(2. "'.he :i.^,di.ags doc:ments that have been complated L+} v:':e Ji-visiO:a. <br />(3) the cv;nul=_tive hydrolocic assessment that was 3one by Ka.mar. Tempo <br />(Bisho?, et al., 1982). <br />Tne apex LJo. :.' operation vines the Lower Pinnacle coal seam o;` the IZes For- <br />maticn by vnderyround methods (see Figure _°or Trine _'ocation!. The c_rer~- <br />tion enters the coal seam at ~_~ cJtcrop in the steep valley wa21s -7f T: out <br />CreeF: and proceeds away _`.-~cr t.;e creek.. Accord-rrr, to t.4e Ape:e :PO. - permi t <br />anpliw tion, only small amounts of water ha v? beer. intersected bu tha mine to <br />date and J~ave resulted ':~ discharce into a sedim<~nt pond. This water has <br />generally been associated -ri th faults. The mine iras net encountered ono^gh <br />water- to re~,cire a discY.arce from their settling pond. Father, tl-.e water i <br />Lsed for water re~uuements around the mine. The d:20U.nt of flow is _stimated <br />tl) be aOOUt :~. Ql ('cs. <br />:;o regional ~ccifers ha re teen disturbed. T%;e c, .u s_gnificsr.t aq,:.:_'e.- :;ear <br />rha_ area is the alluviun of Trout Creek. This area is not proHosed to be <br />significantly disturbed bu minin5 act-*.-ities. ^here_°ore, t5e nine aprears to <br />ha~,-e a negligible off-site ~:zpact on t1;e ground water _esources of tl:e area. <br />Colcwvo Mine <br />• T!;e CoZowyo operation _ e laryz surface mine Located in the uniands abo:~e <br />Good Spr~nc Cree.4-. Ten cog _' seams of -~e t+11_'iaras Fort Forma tiov ~re vin°d <br />_.^. a ni.t teat is about 350 fact deep. T}re strata are very thinly Sec?ded and <br />latera_'1y discor.tinucus. ,VO req_'oral aquifer are disturbed at the min°. The <br />pit is essentially Ivy. The small amount of wa*er t?:at sees from tae hisr- <br />wa.L's does so at such a slew rate := at it is rapidly corsamed bu evaporaticn. <br />T.h:= alluvial aquifer of Coor, spriry Creel: is adjacent to the mine. However, <br />the bet*_om of tie p_t '.s well abcve tie elevatior. of the strdaam, thus iselat.inc <br />the _imited ground water system at the mine from the alluvial 3gi:lfer. There- <br />fore, oaerations at the Colowyo }sine a,.e rot erp~cted to significantly impact <br />off-site around water resources. <br />Earle .a5 and .s5 Ff: nos <br />The Empire Enercy C=rperation is mininc coal from the Pond F seams of tF.e rdiddle <br />idil'iam~ Fork Forma tier, s: undercround mi vin metaods. The mine wcrJd ngs pro- <br />ceed i>eneath a7th t.ie Will:a:ns Fork and t:;e 'r„moa F._vers. T.ro aauifcr, t.ie <br />'l:enty-'::+ile and the 'diG'(ile .^ardstons~s e.eist :?etween the P an~.3 F seans. The mine <br />.rcrY.ings are fairly wee. nv~raue inflow races 'r.to ti;e vines are 0.6.- cfs end <br />0.55 c_`s for the .'o. 5 and :Ve. ? :nines, _esnectivelu. !•lest of the _nflocr arpears <br />to come from .--writ and frar_tere canes. As a _.,;;ult o= nine d~waterina practices, <br />poten~iometric 1cveJs may be loxere.:i .in the .l:entg-Mi1e Serrstons, t!;e ~._Cdle <br />san•?stone, and the al_'::vial aauiiers oi` the .'am:~a and [;illiams Fork .4ivers in <br />the :~iciritu of the mine. PJOt enc.;aF. a nnown about -round water reiatiorsi:ips <br />neat the a:ine to accuratelg n.re3i r_t the macnitvde of these cira:r cc:rns. Sicr.ifi- <br />cant :rater luaiity in_racts are riot an ti ci pa t'il. Ho::ever, ti~are is `he :~o can tial <br />for ~.he mine _=c~~v. ti es to is~acc or_°->; to cround w~tar resources. <br />