REP41855 - Laserfiche WebLink

Home Browse Search

III III III III IIII III 999 STATE OF COLORADO 4 DIVISION OF MINERALS AND GEOLOGY Department of Natural Resources 1317 Sherman Si., Room 215 Denver, CO 80.03 Phone: 13071 866-3567 FA%:1303) 832-8106 March 24, 1993 Attn: John Walters Salt Creek Mining Compaay P.O. Box 70 Loma, CO 81524-0070 Rny Romer Governor Michael B. Long Dn isiun Dvecm~ Re: Review of 1992 Annual Hydrology Report McClane and Munger Mines (C-80-004) and (C-81-020) Dear Mr. Walters: The Division has completed its review of the Annual Hydrology Report submitted for the McClane and Munger Mines for 1992. 1. The operator has complied with Rule 4.05.13 and Stipulation No.3 in the report submittal. All monitoring requirements of wells to be sampled, parameters to be measured and frequency of the monitoring program have been made. 2. The data from the 1992 sampling and measurements fall within the historical range of data from the same well locations. Comments• Manganese levels both above and below the mine seem to have greatly increased in the Munger and East Salt Creeks. The issue was resolved in a phone conversation on March 23, 1993 when it was mentioned that the sampling methodology has been changed. The manganese high levels have been noted since the 1991 sampling and concur with the office being moved to on- site. Since the sampling is now done at the beginning of a precipitation event, the resultant samples are high in salts and metal content. Previous method of sampling involved obtaining samples from the peak flow, thus a lower manganese level was measured. Upon permit examination, high manganese levels exist in the area, with the Colorado River, 19 miles away, reporting levels as high as 1.0 mg/1 Thank you for your cooperation in the resolution of this matter. OF.~~[~ ~e~ • Y ~' ~ ~B]6 ~ 3. The data from the 1992 Annual Hydrology Report's sampling and measurements are within the Probable Hydrologic Consequences for the mine.