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TRAPPER 1CINIp6 IpC. <br />July 29, 1993 <br /> <br />CERTIFIED NP142799397 <br />William Holgare <br />District Manager <br />U.S. Dcpt. of Labor <br />Mine Safety & Health Administration <br />F.O. Box 25367 <br />Deaver, CO 60225 <br />Dear Mr. Holgate: <br />'o~~ <br />pU61993 ~~' <br />RECEIVED <br />p9 COAL ~ -; <br />vd, <br />~~ylrG Y <br />34 <br />5~ <br />;6[~~d~ I <br />I <br />AUG1993 i; <br />USDISTPI T 9 ~EC~y ~/, <br />Subject: Annual Impoundment Report: Coyote Dam (I.D. No. 1211-CO-09-02838-01) <br />Trapper Mine (05-02838) <br />The swctural integrity of Coyote Dam has remained unchanged. All appurtenant swctures including trash <br />racks, decant, valves and discharge CMP are in place and operating az designed. There have been no modi- <br />fications to the sweture in the past year. <br />Water level elevations for the pazt year have fluctuated from a high of 6299.4 ft on 4/28/93 to being virtually <br />dry at an approximate sediment elevation of 6298.0 on 6/16/93. <br />The virtually dry condition of the pond allowed our surveying department to directly develop sediment volume. <br />The results of this survry indicate that the current nmoff capacity to the crest of the emergency spillway is <br />approximately 98 acre-fcet and that the actual sedimcrot volume in the pond is 37.9 acre-feet, a reduction of 3.0 <br />acre-feet from the volume reported in 1992. <br />if you have any questions regarding this report, please call. <br />Sincerely, <br />25618 <br />(MStfvrtn.zvJ <br />e F. Luke <br />~'` ACKNOWLEDGED BY <br />MSHA DISTRICT 9 <br />~~ Al1G - 31993 <br />PSDO <br />GSFO <br />EC fil (303 231-662 <br />D9Chro <br />l,~isg, AllTH. <br />Imrg`~; ~ ._. <br />P.O. Box i87 <br />Craig, Colorado 81626 <br />Wehmanm <br />ojea Engineer <br />3 No. 25518 <br />(303) 824-4401 <br /> <br />