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COLOfL~IDO UEP.~IRT~LIE;V1~ OF PUBLIC IIE:ILTH:I:VD E:VV(RO:V:blFNT. Lv;rr~r Qua[: n' Cunrro( Dtvrsrorr <br />Ruuarule - .inrenrGnerr Nrr 1. Page ~, Pznru! No CO-00002?! <br />lff. PURPD.SE OF:4rLlEN'D,l/ENT <br />• In a lever d~ued November 6. /994, the aernuuee requested a permit runenr(^:ent T?rev are nr(dirrg st.c new ponds. each <br />a~iUr sdparnte outfulls. T/tese wilf be aurfulls 013, 013, 0/4, 0l?, 0/6 and 017. :Iddilionally, thev requested a change <br />in the ••rho(e efjlueru lasrciry (lb'ET) lesung soeazs far ourfall 00~. In n subseauenr letter dared November 2~. l99S, dre <br />penniltee requested that rite Division reduce the numiroriny fi'equenaes for pH. orl and grease and flon• fur all outfalls <br />e.rcepr 003 T77ey requested that this change be urcorpornted into the runendmznr requester( by the first lever <br />/V. RECL•lVlNG STRE:I.Y1 /NFOR,Yl:4TIOfV FOR NE1Y OUTFACES <br />A. /dentijiearion, Classijicatioa and Standards <br />Identification: Ourjalls 012, 013, 014 mtd 0!~ discharge to Sage Creek or unnnrned rributarizs. OurJall 0l6 <br />discharges m an unnamed vibutnry (o Hubberson Gnlch, a triburrtrv to Dry Creek. Outfnll 0l7 dacharges to <br />Hnbbersan Grdcir. Dn' Creek, Hubberson Gulch, Sage Creek aruf [hev tributaries are widrin Segment l2 of fire <br />Yampa River Sub-basin oftlre Upper Colorado River Basin. <br />2. Classificatior7: Segment l2 is designated Use Protected and classified jot the following uses: Recreation. Class <br />2, Aquatic Life, Class 2 (cold), Agnerrlture. <br />3. Numeric Standards: The standards which have been assigned in accordance with the classifications for segment <br />/2 can be found in dre Class~cnrions and Numeric Standards jot the Upper Colorado River Basin (Regulation <br />tVo. 33, 5 CCR 1002-33), as amended November 9, /998. There are no metals standards jot this segment. <br />B. Receiving 6Vater Data <br />• 1. Ounntirv Acute and Chronic Low Flows: The flows which will be used to calndate ague and chronic effluent <br />limitations are the one day in three year low flow (/E3) and the 30 day in drree year low flotiv (30E3) <br />respectively. Those flo}vs (rave been dererntined jot Dry Creek, Sage Creek, Hubberson Gulc/t and their <br />rutnamed tributaries by the Wnrer Qualiq' Control Division, and are as follows (all flows in cubic jeer per <br />second): <br />Table IV-f -- Acule arrd Chronic Low Flows <br />Acute Chronic <br />Annum 0 0 <br />2 tmli Quality' data for Dry Creek, Sage Creek Hubberson Gulch and their unnnrned tributaries are <br />unnecessary for this anrerrdment. Please see section VI.A.2. discussion of water quality standards. <br />V. FACILITY DESCRlPT1ON <br />A. Industry Description <br />Tie of Industry: Seneca Coal Cmnpany operates three surface coal mines -dre Sznecn l/ hiine, the Seneca I/ <br />West lvline and the }bast Kline, togedter as what (hry refer m as a "Logical Mining Unit" Sonic wrens of dre <br />mines hove been reclaimed. however, no sedinrenration pond systems sen•e entirely reclaimed wrens. <br />2. Sources ro the Treamrertt S~:rrents: Tl[e facility generates surface nmoff, spoils spring water, pit pumpage <br />(rypicnlh' precipuation that has entered dre actively mined pit areas) mrd rehrcle (cool lmul tnrck) wash water. <br />• Tltese waters are routed m the vanous sedimentation ponds for rreunnen! and discharge Table V-I nn page i <br />specifies which sauces are projected to be treated in the new pond sysrerns <br />