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iii iiuiiiiniu iii <br />• • <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1373 Sherman $t., Room 215 <br />Denver, CO 80203 <br />Phone: (303)866-3567 <br />PAX: (303)832-8106 <br />December 10, 1993 <br />Mr. Marcus Middleton <br />Twentymile Coal Company <br />29587 Routt CR No. 27 <br />Oak Creek, CO 80467 <br />RE: 1992 AHR Review Responses, Foidel Creek Mine, No. C-82-056 <br />Dear Mr. Middleton: <br />~F ~nt0 <br />i.F - - R <br /><~ b <br />0 <br />.~. <br />r <br />~ te]6 ~ <br />Roy Romer <br />Governor <br />Michael 8, long <br />Division Director <br />The Division has completed review of TCC's responses to Division review of the 1992 Annual <br />Hydrology Report for the Foidel Creek Mine. All responses were determined to be adequate <br />with the following exceptions, where additional information is requested. <br />1. Site 1003 elevation is still incorrect on either the data sheet or the station elevation table at <br />the beginning of the data section. Please correct as necessary. <br />2. Site 8 depth and flow readings reveal the following: <br />-1.62 depth 6.7 cfs <br />-1.02 depth .6 cfs <br />-3.75 depth .6 cfs <br />Different depths are shown as being converted to the same discharge. Please correct this <br />information and Table 30. <br />3. Please reference the location of the data in the TCC permit which demonstrates that mine <br />discharge composes favorably with predicted.inflow rates. <br />Please respond to these fmal items within 30 days of receipt. If you have questions please <br />call me. <br />Sincere y <br />1~~~'~v"`"- <br />Ken A. Gorham <br />Environmental Protection Specialist <br />KAG/ern M:\oss\ern\20mile.kag <br />