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~~3 <br />TRAPPEL 1R1IIlIIG IIIC. <br />r <br />July 29,1991 <br />~~ <br />CERTIFIED IP468756352 <br />John M. DeMidtid <br />Divtriet Maroger <br />U.S. Dept of Lbor <br />Mine Safety d; Health Adminbtration <br />P.O. Box 23367 <br />Denver. CO 80275 <br />Dar Mr. DeMichiet <br />Subject: Ananal Impoundment Report: Coyote Dam (I.D. No. 1211-CO-09.028.38-01) <br />Trapper Mine (05-02838) <br />The structural integrhy of Coyote Dam has remained unchanged. All appurtenant strudnres indudittg trash <br />wcb, decent, vahres and discharge CMP are In pkrx and operating as designed. Investigation d a smafl <br />trkkle of water reported last yar wa~ performed and the ptindpal spillway dent culvert avat repaired and <br />the leak stopped. <br />7Lerc hrn 6eeo 0o modiRatbro to the structure in the past yar with the exception of repairing tie decant <br />culvert and we do out antidpate arty significant maintenaax of the strnaure during the corrcnt yeas <br />Water level elevadoro for the past yar hrn Onctoated from a low of 690!.0 R on 7R3N1 to a high 463060 <br />R on 7/31/90. Average pond water elevatbn was 6304.2 R Clrrreotly, the water level B at 6,302D R as of <br />7/L9N1. ' <br />From the annual sediment survey done on 7/LS/91 at Coyote. there has been a OS aae-feet sediment contri- <br />bution to the Coyote Dam. Thb sediment additbn increases the tom! sediment volume in the goad to 46.23 <br />acre-feet . Therebrc the eurtent runoff capadry to the nest dthe emergeary splhvay b89.67 aces-kst. <br />II you have any gaestioro regarding thb report, please nlL <br />Sinoercly, <br />~~ <br />Roger W. Fish, P.E. <br />Sr. Project Engineer <br />J <br />RWF/Jb <br />(MSHA/JU[29] <br />J., stern <br />W.,Agn <br />W.S. arding <br />P.O. Box 187 <br />Craig, Colorado 81626 <br />(~) 824-4401 <br />