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COLOR.IDU DFP.IIiT,b1ENT OF PUBIIC IIE:V.TFI.I \'D £:VVIR0:~4b1F:"T. l4',uer nuaAty Corurul Dt~tstnn <br />K,utonnle ~ Amenr4rtent Nn I Page ?. Pernut No CO-0000221 <br />lll. PL'RI'n.SE nr• A:LIENpbIENT <br />• /n a (etler dare[i :November 6, 1994, rite penrnttee requested a pernttr amend+r,~rv rte are addntg st.~ rtew ptrrtds, east, <br />with sepcrnue outfal(s. T)rese will be outfnlls Ol?. 013, 01-1, 01~. 0!ti and 017 :Idditionelh'. t/tec reyttesrerl a c/trnge <br />in rite a-hole e~[[etu ro.riary (ti'/ETI testhr,g species jor orrtfall 005. Lt a suhserytrertr leRer dared rVOVernber 23. 1995, the <br />pennittee requested rltnt the Division reduce the ntunttoring frequencies (ur pH. nil mul grease mtd llnm for all ourfalls <br />e.rcept 003. T3rrv rer(rtested that dos change he incorporated irrro the rrnendrnear regrrered by dte Jirst leuer. <br />Iv. RFCervl,vG STREA,L1 LVFOR,LI,LTION FOR NEW OUTFACES <br />:1. ldentijication, ClassiJicatioa and Standards <br />Ident~carion: Outjalls 012. 013. 014 and OI S discharge to Sage Creek or unnamed tribtuaries. Ourfn(1 0I6 <br />discharges to nn unmm~ed trtbutnry to Hubberson Gulch, a tributary to Dry Creek. Ourfnll 017 discharges to <br />Hubberson Gulch. Dry Creek, Hubberson Gulch, Sage Creek mtd their tributaries are within Segment 12 of the <br />Ynntpa River Sub-basin of the Upper Colorado River Basin. <br />2. Classt~cation: Segment l2 is designated Use Protected and classified for the following uses: Recreation, Class <br />2; Aquatic Life, Class 2 (cold); Agriculture. <br />3. tVumerie Stnrtdnrds: The standards which have been assigned in accordance with the classifrcatians fvr segment <br />12 can be jottnd in the Classjfications artd Numeric Standards for the Upper Colorado River Basin. (Regulation <br />No. 33, 5 CCR 1002-33), as amended November 9, 199B. There are no metals standards jor this segment. <br />B. Receiving Water Data <br />• 1. Ottnntiri Acute and Chronic Low Flows: The flows which will be used ro caladale acute and chronic efJiuent <br />limitations are the one day in three year low Jlow (1 E3) and dte 30 day in three year !ow flow (30E3) <br />respectively. T3tose Jlows stave been determined jor Drv Creek, Sage Creek. Hubberson Gttlc/t and their <br />unmm~ed tributaries by the Water Quality Control Division, and are ns follows (all flows /n cubic jeer per <br />second): <br />Table IV-1 --Acute artd C/tronie Low Flows <br />Acute Chronic <br />Annual 0 0 <br />2. stall Qttaliry data jor Dry Creek, Sage Creek Hubberson Gulch and their unnamed tributaries are <br />unnecessary jor this amendment.. Please see section VI. A. 2. discussion of water quality standards. <br />V. FACILITY DESCRIPTION <br />A. Industry Descriptiat <br />Type o(lndiustrv: Seneca Coal Company operates three surface coal mines -the Seneca 11 Mine, rite Seneca I! <br />West Mine and the Yonst Kline, rngedter as what thry refer to ns n "Logical ,blining Unit ". Some areas of the <br />mines have been reclaimed. however, no sedimentation pond systems serve entirely reclaimed areas. <br />2. Sources ro the Treatment $ysrents: Pte jurliry generates surldce runoff, spoils spring water, pit pumpage <br />• (typically precipttnrinn duo has entered dte actively rntned pit areas) and vehicle (cool haul tnrck) wash w'uter. <br />These waters are rvrrled !o the vanous sedin!enrnliat pards far treatment and discharge Table V ! on page 3 <br />spedfies tehtch sources are projected to 6e !reared in the nesv pond sysrents <br />