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Jun 25 98 09:42a Cyprus Rmax User <br />C TW6NTYM11.6 <br />a~ COfW COMPANY <br />A Cyprus Amax Company <br />28 January 1998 <br />]glut A. Kuzar <br />District Manager <br />Mine Safety & Health Administration <br />P.O. Box 25367 <br />Denver, CO 80255 <br />RE: 1997 Annual Imooundmcnt for TwenhTnilc Coal Company <br />Dear Mr. Kursr: <br />[9701 870-2753 _ p.2 <br />III IIIIIIIIIIIII III <br />999 <br />Twenrymile Coal Company <br />29515 Rouri County Road (i27 <br />Oak Greek, Colorado eoa87 <br />970-879-3800 <br />I.D. No. 05-03R36 <br />The following information constitutes the 1997 Annual Report for the impowtdments listed below as outlined <br />by 30 CFR 77.216-4. <br />Rond A 1 D No 1221-CO-09-003.02-1 <br />A. Geometry of the impounding structure' <br />1. No changes during the reporting period. <br />B. Average mid maximum depths and elevations of impounded water: <br />1. Average depth: 17.4 ft. Maximum depth: Z0.5 ft. <br />2. Average elevation: 6934.4 Maximum Elevation: 6937.4 <br /> <br />C. Volume of impounded water: <br />1. Approximately 103 acre-fee[. <br />D. Stability of the impounding structure: <br />1. No changes during reporting period. <br />2. No chattges occurring during the report[ng period. <br />Pend D_ 1. D. No. 121 I-CO-09-00302-02 <br />A. Geometry of the impounding struct[[rc: <br />1. .4pproximatcly 2,020 cubic yards of material dredged from structure during the reporting <br />period. <br />B. Average and maximum depths and elevations of impounded tvatcr <br />1. Average depth: 6.5 ft. Maximum depth: 7.2 R. <br />2. Average elevation: 6847.5 ft. Maximum elevation: G$48.4 ft. <br />C. Volume of impounded water: <br />1. Approximately 17 acre feet. <br />• <br />File; I:\En\Envrioncmtal\Docment\TCC\97impndrpt.doc <br /> <br />r rasa: ~~ r v~ o i v-~ r ao <br />FROM: TRACY AUWAERTER <br />DATE: l~l _ r~~ ~ O TIME: ~ ' \~ <br />NUMBER OF PAGES TO FOLLOW: ~~ <br />PLEASE DELIVER ATTACHED PAGES TO: <br /> <br />NAME: ~ a~.C <br />COMPANY: <br />PHONE: <br />~'..r~~^~-- <br />FAX. ~ o <br />~. <br />f~~i~ -~,10C~ <br />COMMENTS: <br />