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<br />III IIIIIIIIIIIIIIII <br />999 <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depa«ment o(Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Phone:f303)866-3567 <br />FAX: (3031832-8106 <br />March 24, 1993 <br />Attn: Larry Campbell <br />Coors Energy <br />14062 Denver West Parkway <br />Building 52, Suite 300 <br />Golden, CO 80402 <br />Re: Review of the Reenesburq Annual Hydrology Report 1992 <br />Reenesburq Mine (C-81-028) <br />Dear Mr. Campbell: <br />OF'~n[O <br />1~ ~4 <br />~~'- b <br />w~ o <br />~~~G•. <br />• Ig l6 <br />Roy Rnmer <br />GOVernor <br />N i<ha el g. LO nG <br />D rviaiOn D~rectOr <br />The Division has completed its review of the Annual Hydrology <br />Report submitted for the Keenesburg Mine for 1992. <br />1. The operator has complied with Rule 4.05.13 and relevant <br />stipulations in the report submittal. All monitoring requirements <br />of wells to be sampled, parameters to be measured and frequency of <br />the monitoring program have been made. <br />Recommendation: <br />Concerning well AMW-2's current situation, the Division <br />requests that a minor revision be submitted as soon as the <br />weather permits for clearing or replacing of the well. April <br />or May resolution of this matter would be appreciated. <br />2. The data from the 1992 sampling and measurements fall within <br />the historical range of data from the same well locations. <br />Comments• <br />In general, the water quality at the mine site is improving <br />over time. Decreased alkalinity and total dissolved solid <br />content has been observed for most of the wells. Well SMW-1, <br />this year showed a noticeable increase in salt content due to <br />re-disturbance of the long term spoil pile in re-excavation <br />efforts. <br />3. The data from the 1992 annual hydrology report's sampling and <br />measurements are within the Probable Hydrologic Consequences <br />for the mine. <br />