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TRAPPER ~l~~t~C ~~C. III IIIIIIIIIIIIIIII <br /> <br />May 17, 1991 <br />MAY 2 3 1991 <br />CERTIFIED NP546405463 <br />Ms. Kathryn Dolan <br />Water Quality Control Division <br />Colorado Department of Health <br />4210 East 11thAvenue <br />Denver, CO 80220 <br />Dear Kathryn: <br />>tilined Land <br />Reclamation Division <br />This correspondence summarizes proposed sedimentation pond construction activities at Trapper Mine <br />during the 1991 field season. Three new sedimentation structures (Deer Gulch, West Pyeatt Gulch and Far <br />East Buzzard Gulch), all NPDES locations, will be constructed in 1991. The pond(s) wnstruction is neces- <br />sary in order to control all potential sediment e(Cluent from our mining and reclamation activities. <br />In addition to new pond construction, the spillway design o1 two existing sedimentation structures, both in <br />Johnson Gulch (ponds 9 and 10), will he modified. Prior to spillway modification (rebuild), the ponds will <br />be dewatered, allowing sate and dry working conditions for Trapper personnel and a controlled discharge of <br />the retained water. Trapper will make every effort to ensure water quality paramctcrs arc not cxccedcd <br />during the dewatering o[ Johnson Gulch pond #~ 10 (NPDES site 001). <br />Kathryn, we are working closely with the CMLRD on all proposed construction activity. We will keep you <br />informed if there are any significant deviations in our proposed activity. <br />Besi~rejgaLrds, <br />~~~ v~.1:~G~~~~r~r~ <br />William Agnew <br />Sr. Environmental Engineer <br />WArb <br />1CDOHIMAY]7J <br />J.M. Mauern <br />R.W. Fish <br />W.S. Harding <br />B.D. Nicholson <br />W.C. Robb, WDB&T <br />fel <br />P.0. Box 187 Craig, Colorado 81626 (303) 824-4401 <br />