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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />fAX: (303) 832-8106 <br />21 August 2003 <br />Mr. George Patterson <br />Energy Fuels Coal, Inc. <br />PO Box 459 <br />Florence, CO 81226 <br />Re: Technical Revision No. 35 (TR-35) <br />Southfield Mine (C-81-014) <br />Dear Mr. Patterson, <br />COLORADO <br />DIVISION O F <br />MIN&RALS <br />GEOLOGY <br />0.EC LAMATION•M INING <br />SAFETY•SCIENCE <br />Bill Owens <br />Governor <br />Greg E. Walther <br />Executive Director <br />Ronald W. Cottony <br />Division Direcor <br />Natural Resource Trustee <br />The Division has completed its adequacy review of Technical Revision 35 -converting <br />the North Dewatering Well into a monitoring well. Below are questions the Division has <br />regazding the 9 July 2003 submittal. <br />Based on the description of the dewatering operations on pages 2.05.3-12 to 14, <br />it's not clear what hydraulic connections exist that will effect the water levels at <br />the proposed location. Please describe in the groundwater monitoring section <br />exactly where the North Dewatering Well is situated in the underground flow <br />system. From where does water accumulate in the 1-North section? <br />Is it predicted that water will flow out of the 1-North section once the level <br />reaches some particulaz level? If it will exit the 1-North section, where will it <br />flow? <br />3. The proposed well was added to the Probable Hydrologic Consequences section <br />of the permit. Please include there a prediction of what data from that well will <br />show. That is, based on the most recent data concerning mine inflows and the <br />operator's knowledge of the mined-out sections, what is anticipated at this <br />location? <br />4. The depiction of this well on the revised map included in the revision submittal <br />does not make clear exactly where the well is located. Please assure that the well <br />is included on maps of the monitoring locations. <br />Office of Office of Colorado <br />Mined Land Reclamation Active and Inactive Mines Geolog[cal Survey <br />