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~, r . III III I III STA'I~ OF COL,.,~.~~ G MINED LAND RECLAMAT{ON D{V{SION ~oF ~o~ Department of Natural Resources 'G'Ps Nei M \$ 7313 Sherman St., Room 215 ~ ~ ~, F~ Denver, CO 80203 303 866-3567 •ie7s• Fnx 303 832-8t06 Roy Romer. Governor Michael B. Long, Division Director May 6, 1992 Mr. Marcus Middleton Colorado Yampa Coal Company 29587 Routt County Road No. 27 Oak Creek, Colorado 80467 RE: Review, Annual Hydrologic Report, 1991 Water Year, C-84-062, Mine No. 3 Dear Mr. Middleton: The Division has completed its review of the above referenced report. Please respond to each item below at your earliest convenience. General Comments The introduction is somewhat confusing. It reads "The surface mine, which was activated between 1974 and 1980, was called Mine No. 3. It was faced-up in a Mine No. 3 highwall." It seems some discussion is missing between these two sentences. Also, the items addressed in the General Comments section from our review of the 1990 AHR for Mine 3 dated August 19, 1991 were not addressed in the 1991 AHR. Overall, the report is well organized and the monitoring plan is clearly indicated in Table 1 and Table 2. Monitoring Frequencv Bedrock Wells Spoil well 008-SP-4a is 85 ft. deep with a 45-85 ft. On 5/29/91 a level reading was however, all other readings indicate a dry was the surface pit in this area? What is anomalous reading of 38 ft.? Why hasn't a in this area? screen interval from taken of 38 ft. to water; conditions. How deep the explanation for the spoil aquifer developed 2. In general, elevation information does not correlate between Table 1 and Map 4B. Also site 900 is listed at 3730 ft. Please correct all information to be accurate and consistent. Alluvial Wells Why are semi-annual quality analyses being conducted on 008-AV-1?