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", v ' ~, <br />tF <br />"~ Cbrp, 9/10/76 cited in Wright Water Engineers 1/11/77), to bett:e'an 75 and <br />150 gallons per minute (Wright Water Engineers, 1/11/77). 1'ossiule sources <br />of these supplies range from the Stevers Gulch alluvium (thy` app'iicants <br />`•'•' preferred source), to wells in alluvial and colluvial deposits of other <br />nearby drainsges, the Forth Fork of the G+rnnison River (p,-::5urt~.^.i,ly utiliz- <br />ing a portion of the ccmp;:ny's interest in the Last Lal<c 5laugll}, acrd use <br />oi- ;rater •rights acquired ;vith agricuitur;al lands purchased by the cc~,ipany. <br />Ilhile Mre recognize that the ureter supply -crater rights issue is a <br />highly complex one', ae also hasten to point out the impori;rt;~c of this <br />issue to residents of the Horth fork lral7ey and the overall Question of <br />energy development in the crest. Gecause of this, EPa believes that thc._=. <br />FAR Tust cal•efully analyze the waiver needs Of 'the psapos2d ;,;ojec'; at a <br />variety of production i2vels, including the rate o. praduction that may <br />occur as a result of any short-tet~sn lease sale and cite pr;:sum~d ma:cimum. <br />levels of praduction. In su,tattary, the ;+ater supply impacts of a ,-ea`;on- <br />able shart-form lease and Lh~ possible ma:cim~m level o~ d:`velo;.aten~t cf <br />the project must be thorau~3hly analyzed in ail its many rac~ts, iu•:luding <br />situations rt<r,ging fl•c-n vthnt could b~ ter^ted "optimal," 't.o ~.t~~ "n~~t <br />likely," and ct,~ "wors'c rase" situations. <br />Dater quality Impacts <br />A}ti The Thorne Ecological I:,sti'cutes's second quarterly report on'tite <br />proposed project (See Chapi;er II) discusses increased le•a21s of runoff <br />tF:at ar^ anticipated in certain drainaga5 ov:iny to the diversion works <br />to b2 installed above the mine and su•rfac~ di;tul•bance i;t tiro mining <br />area. These increases in t•unorf may lead to accelerated.^rasiort and the <br />• associated ;:afar quality itiipacL-s (e. g. incre~;es in dissolved and sus- <br />pended solids), both in areta t:ha_re Che native ve9etaiaon is undisturbed <br />ar,d v,her•~ soils liavc been expos^d by ac'civiti^s related {:~ construcLlon <br />and operation of thr mine. 7h~ corwultant's report also addresses :niti- <br />gation or Er~oslon accelerated by changes in surt`ace h;~dr•olGgy, however, <br />th=_re is no irdica~iert tit fire Fr1~ that cartai~ or the ccitsultant's <br />r~ca~arendations will be ite~ded (e.9. :rtot^g' dissipaiol's cid drop struc- <br />tures at the ends o7 the diversion channelj. In fa,.t, ti:~~,e ser.~ns to <br />~~, be a conflict bettre.;n the cAR ;~;Itich contains the stat~~~~ent that "with <br />tie zxception of Mile probable ma;cirtttn thunderstorm event, ti~~ adjacent <br />drainage basins titer receive t'i~ diverted runnrf r:atar• a.^•a considered <br />to be stable enough to handle Lh~ extra ~:rat01• r'le;•rs (r_ga lII-11)," and <br />t+te first q::art:l•ly report i'rc:~ T}torna, 1n w;tich "adcrluate rortirnl on <br />receiving sr.1t.2~'sheds so as to mi ~iyat2 the iotpacts i rove inc, ccsed runoff <br />~ (page II-O)," is rec::r.-~tended, c"°;1 bel ie!~e= c;iat tltes? :~ti;aofs should be <br />~ discussed in t;t~ CAR and that any n~itig<aing measures n2^d~ci to reduce <br />""~ tY,c:m should b2 identified in the EAR and sL'ipulated tit t;~e proposed <br />:,i,; lease. Furtitenraro, the EAR on the reccriended alternative must idanti- <br />iJ, ,.nd ::lt:: subseGueni: 12aSC ri711St 51:ipiJl eta Jn'! protecti`J= mess UrCS i1CCE5- <br />-'' sa;•y to Gl~or t:o ma?;~ the pt'O~CCt envlrGr~rncntally 4cc_~ptaule. <br />i <br />_ _~..-. <br />