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>~ <br />STATE OF COLORADO <br />DIVISION OF MINERALSAND~GEOLOGY <br />Depanment of Natural Resou~ ~' '~~ <br />1313 Sherman St, Room 215 ~~ <br />Denver, Colorado 80203' ~-•.~~ <br />Phone: (303) 8663567 __ <br />FAJ(: (303) 832106 j l <br />~' 'S"l ..1~. <br />.. f ..- <br />January ,200 <br />George Patterson <br />Energy Fuels Mining Company <br />P.O. Box 449 <br />Florence, CO 81226 <br />~; <br />!;1` ~%, <br />-,; <br />RE: 2004 Annual Hydrology Report Review <br />Southfield Mine <br />Permit No. C-81-014 <br />Mr. Patterson: <br />COLORADO <br />DIVISION OF <br />MINi~RALS <br />GEOLOGY <br />Bill Owens <br />Governor <br />Russell George <br />Executive Diretlor <br />Ronald W. catrany <br />Division Dlrettor <br />Natural Resource Trustee <br />The Division of Minerals and Geology has completed review of the 2004 Annual <br />Hydrology Report (AHR) for the Southfield Mine. Please review our questions or <br />comments and respond, if necessary, within 30 days. <br />Monitoring Frequency -Surface Water <br />Exhibit 25 of the approved permit application details the hydrologic monitoring <br />frequency for surface and ground water at the site. Magpie Creek, Newlin Creek, and <br />Second Alkali Creek are monitored at the reclaimed mine site and Oak Creek is <br />monitored at the loadout. The required frequency is semi-annual visits with samples <br />taken semi-annually if flow is present. Visits were made to all required sites in April and <br />December during 2004, in accordance with the approved plan. Flow was recorded at <br />all sites in April (with the exception of Second Alkali creek) and water samples were <br />taken and sampled, at a minimum, for the constituents as required by Exhibit 25, part I <br />(C) (5.) <br />Table 9 indicates surface water sampling in April and December of 2004. Please <br />explain the statement in the text an page 23 "Surface water samples were <br />collected only during June 2004". <br />Monitoring Frequency -Sedimentation Pond Discharges <br />Four sediment ponds remain {two at the mine site and two at the loadout) to treat <br />surface runoff from the reclaimed areas. No discharge was recorded during 2004 at any <br />of these ponds. This is consistent with Division inspection throughout the year. <br />Monitoring Frequency -Ground Water <br />Four ground water wells are monitored at the site on asemi-annual basis for both water <br />level and water quality. Two wells (MW-16 and MW-65) are completed in the Jack O <br />Office of Office of Colorado <br />Mined Land Reclamation Active and Inactive Mines Geological Survey <br />