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III ~IIIIIIIIIIIIIII <br />999 <br />TRAPPER 1EiNING INC. ,~~~ ~' ~'~~ <br />Recd ~/~~ ~~ ~9g1 <br />February l2, 1991 m3%jp `?nd <br />~/F/S%pR <br />CERTIFIED #P5681416231 <br />Ms. Kathy Dolan <br />G~lorado Dcpt. of Health <br />Water Quality Control Division <br />4210 East 1 lth Avc. <br />Dcnvcr, CO 80220 <br />Dear Ms. Dolan: <br />Subject: Change in Colorado Wastewater Discharge Permit <br />CO-0032115 -Trapper Mining Inc., for Trapper Mine. <br />Trapper Minc is requesting an additional NPDES discharge point to our current NPDES system. During <br />the late spring/early summer uF 1991, Trapper will begin construction of a single sediment pond located in <br />the Wut Pycau drainage. The pond will provide scdimcnt control for mining and topsoil removal aaivitics <br />commencing in 1991 in the West Pycau drainage area. As proposed, the West Pyeau discharge pond <br />(NPDES) should not require wet sampling as no pit-generated water will be discharged into the draittagc <br />system. <br />The new discharge point, 013, is located immediately south of our permit boundary in West Pyeatt drainage. <br />The proposed pond location is in the SW 12 of NE I/4, Section 26, T6N, R91W. The attached map <br />"Drainage Divides of the Mine Plan Area and Location of Current Surface Water Sites" (M30A) shows the <br />location of the proposal discharge point and all other NPDES points at Trapper Mine. The design capacity <br />for the West Pyeatt pond (Sedimot 11 software - IO year, 24 hour event) is L30 million gallons with a 10 year, <br />24 hour equivalent volume (worst case) of 0.69 million gallons. The discharge from this site is the Yampa <br />River. <br />We request the discharge location become active uppon completion of scdimcnt pond construction. Trapper <br />has submitted a technical revision (TRSI) to CMLRD, with appropriate hydrologic information, for their <br />approval. We will notify you when construction commences, of construction completion, and of any <br />proposed discharge into this drainage. <br />Please contact me if you require additional information or have any questions. ThanFs for your assistance iu <br />our current permit re-awhori~ation. <br />Sincerely, <br />~ U <br />ii~„~a~s, ~r~ <br />William Agnew <br />Sr. Environmental Engineer <br />WA/jb <br />jCDOH~FEB13] <br />Enclosure <br />(w/o maps) <br />].M. Maucrn <br />R.W. Fish <br />B.D. Nicholson <br />W.S. Harding <br />rC: Berry, MLRD <br />R.L. nyo <br />tilt <br />P.0. Box 167 Craig, Colorado 81626 (303) 624-4401 <br />