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III IIIIIIIIIIIII III <br />999 <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depanmem of Natural Resources <br />1 311 Sherman Sl .Room ? 1 S <br />Denver, Colorado 80203 <br />Phone: (3031 86EJ567 <br />FAX: 13031 832-tl 105 <br />May 26, 1998 <br />Allen S. Weaver <br />Energy Fuels Coal, Inc. <br />P.O. Box 459 <br />Florence, Colorado 81226 <br />Re: Southfield Mine (C-81-014) <br />Technical Revision No. 30 <br />Deaz Mr. Weaver: <br />I~~~~ <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />Roy Rome. <br />Governor <br />tames S. LochheaA <br />Executive Diredrn <br />an~chael B. Lung <br />Dinsion Director <br />The Division has completed at preliminary review of the refuse azea expansion proposed in TR-30. As <br />a result of our review, we have the following questions and comments. <br />EFCI needs to revise Map 20 to indicate that the collection ditch will be moved to accommodate <br />the pile expansion. <br />2. The volume figures provided by EFCI indicate that there will be a balance of soil removed and <br />soil replaced. When settling and handling due to loss are considered (usually around 10-15%), <br />however, there may be a shortage of subsoil. EFCI should make an effort to salvage more than <br />the 4-6' planned, to ensure that the required total of 4' of cover is achieved. <br />3. When EFCI initially permitted the refuse azea borrow in TR-20, there was discussion that EFCI <br />expected to encounter boulders in the subsoil which would decrease the volume which would <br />ultimately be available to cover the refuse pile. The proposal under review now does not consider <br />that predicted volumes might not be obtained if boulders are encountered. Has EFCI done <br />additional soil investigation to rule out this problem? <br />The Division has not yet reviewed the application for geotechnical adequacy. We will forwazd comments <br />regarding this portion of the review as soon as it is completed. Should you have questions or need <br />additional information, please contact me. <br />Sincerely, <br />~~ <br />Susan LL Bur <br />Environmental Protection Specialist <br />SLB\0??698. W P W <br />