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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />137 3 Sherman St., Room 27 5 C O L D ItA D O <br />Denver, Colorado 60203 D l v l s l o x o f <br />Phone: (303) 8663567 MIN & t~ L $ <br /> <br />FAX: (303) 832A706 <br />GEOLOGY <br /> REGLANATIp N•NINING <br /> SAfETY•SCIEN CE <br />June 8, 2004 <br />Bill Owens <br />George Patterson GGVemGr <br />Ener Fuels Minin Com an Russell George <br />9Y 9 P Y Executive Director <br />P.O. Box 449 <br />Florence, CO 81226 Ronald W. Cottony <br />Division Direcror <br />Natu21 Resource Trustee <br />RE: 2003 Annual Hydrology Report Review <br />Raton Creek Mine, Permit No. C-82-055 <br />Mr. Patterson: <br />The Division of Minerals and Geology has completed review of the 2003 Annual Hydrology <br />Report (AHR) for the Raton Creek Mine. <br />Monitoring Frequency <br />1. Monitoring of water level in the luppa and Refuse wells was met on a quarterly basis as <br />required by the approved permit. <br />2. Monitoring frequency, specific to laboratory sampling requirements, was met on a semi- <br />annual basis for the luppa well and the Refuse well. <br />Water Quantity and Quality <br />3, The Division notes that EFMC will be using a new field conductivity instrument in 2004. <br />No significant changes attributable to mining have occurred regarding water levels in the <br />two monitoring wells. The last four water level values for the refuse well are within a <br />narrow, defined range established since 1995. Variation in the luppa well water level is <br />not unusual. Water quality shows no degradation affecting any probable use. Surface <br />water flow and quality remain generally unaffected by this operation. <br />Thank you for your efforts to complete hydrologic monitoring in accordance with the approved <br />plan. If you have any questions, please call me. <br />Sinc ly, ~~~ . <br />K orham <br />Envi onmental Protection Specialist II <br />Office of Office of Colorado <br />Mined Land Reclamation Active and Inactive Mines Geological Survey <br />