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<br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />131 3 Sherman St ,Room 215 <br />Denver, CO 80203 <br />Phone: 130718661567 <br />FA%:13071 8 3 2-81 06 <br />December 1, 1993 <br />Attn: Al Weaver <br />Energy Fuels Coal, Inc. <br />P.O. Box 449 <br />Florence, CO 81226 <br />~II ~I~~II~II~~~I ~II <br />STATE OF COLO~~vU <br />OF' Cpl <br />~•b <br />~~~ <br />~~ ~o <br />~~~ <br />• re T6 ~ <br />Ray Romer <br />Governor <br />Michael B. LOng <br />Drvrsion Dimaor <br />Re: 1993 Annual Hydrology Report Review for Energy Fuels Coal, Inc. <br />Southfield Mine (C-81-014) <br />Dear Mr. Weaver: <br />The Division has completed its review of the 1993 Annual Hydrology <br />Report and have found that all permit commitments have been met <br />with the exception of the few issues listed below. <br />Issues: <br />1. For the items below, please see Table 8. <br />Well TD levels in MW-8, MW-10 and MW-65 may be incorrect. <br />a. MW-8 should be 960' but was mined through: now recording <br />1038'; <br />b. MW-10 should be 402'TD but is recording 460'. Mined <br />through? <br />c. MW-65 shows loss of 8'. Should be 1448, but reading 1440'. <br />Please provide an explanation of the three TD levels. <br />2. Mine inflow doubled from last year (34.6' to 62.4') as did <br />total water quantity discharge (3.9 ACFT to 24.6 ACFT). Is <br />this entirely due to excessive precipitation events during the <br />month of August as is implied in the report, or are there <br />additional causes for the increase, such as new areas being <br />mined and dewatered? Please clarify. <br />Comments: <br />Groundwater <br />1. Monitoring of TD was done annually per permit requirements. <br />2. Water levels taken quarterly per permit frequency <br />requirements. <br />3. Water quality taken semi-annually and quality has remained <br />constant in all wells with no significant deterioration over <br />time. Wells checked: MW-10, MW-16, MW-23, MW-65; for all <br />parameters. Water type is a sodium bicarbonate or sodium <br />