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- - • ~ III IIIlllllllllllll <br />999 <br /> <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depar7menl o! Natural Rewurces <br />1313 Sherman Sr.. Room 215 <br />Denver, Colorado 80203 <br />Phone: (3031 866-3567 <br />FAX: (3031 832-8106 <br />February 15, 1995 <br />Mr. Karl Koehler <br />Colorado Yampa Coal Co. <br />29587 Routt Co. Rd. # 27 <br />Oak Creek, CO. 80467 <br />RE: 1994 Annual Hydrology Report, Mine No. 3, #C-84-062 <br />Colorado Yampa Coal Co. <br />Dear Mr. Koehler: <br />~~ <br />DEPARTME.N't OF <br />NATURAL <br />RESOURCES <br />Ray Romer <br />Govertar <br />lames S. Lochhead <br />Executive Director <br />Michael B. Long <br />Division Director <br />The Division has completed review of the 1994 Annual Hydrology <br />Report for Mine No. 3, #C-84-062. Please respond to each issue as <br />appropriate within thirty days of receipt of this letter. <br />General Comments <br />1. Please respond to item A. from the December 12, 1994 Division <br />letter with regard to the 1993 AHR for Mine No. 3. <br />2. An overall improvement in report quality and monitoring <br />frequency compliance is noted. <br />Monitoring Freouencv <br />1. The flow data for Site 900 appears to be incorrect (30-50 <br />cfs). Please correct and re-submit as appropriate. <br />Water ouality and ouantity Review <br />Groundwater <br />Water levels have recovered to approximate pre-mining levels <br />in the Wadge overburden as evidenced by wells 008-77-58 and <br />008-79-6. <br />Wel <br />008-77-58 <br />008-79-6 <br />1980 level <br />6705 ft. <br />6647 ft. <br />1995 level <br />6710 ft. <br />6660 ft. <br />Total dissolved solids values measured are currently close to <br />the 1023 mg/1 baseline mean value for the Wadge overburden. <br />