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III IIIIIIIIIIIIIIII 999 DIVISION OF MINERALS AN4 G~OLOFY Department of Natural Resources 1313 Sherman St., Room 215 Denver, Colorado 80203 Phone: (303) 8663567 FAX: (3031 832-8106 March 26, 1999 DIVISION OF MINERALS GEOLOGY RECLAMATION MINING•SA FETY John Walters Bill Owens covemor . Powderhorn Coal Company Greg E watcher P.O. Box 1430 &eculive Director Palisade, Colorado 81526 Michael B. long Division Director RE: 1996 Annual Hydrology Report Roadside Mine (Permit No. C-81-041) Dear Mr. Walters: The Division has completed a review of the 1996 Annual Hydrology Report for the Roadside Mine. For various reasons, the report submittal had been delayed for approximately 10 months. A few discrepancies were noted with respect to the reported data. Flow data for gaging stations SWGS-02 and 03 during July and August, 1996, was missing. For SWGS-02, the problem was apparently due to a problem with the recorder, which was subsequently repaired. For SWGS-03, it would appeaz that the missing data was due to flow level below the minimum recording level. These problems aze referenced briefly on page 2 of the report narrative. It was also noted that sodium adsorption ration (SAR) was not reported in the annual full suite analyses for minewater dischazge samples for NPDS-001, 002, and 004, although analytical parameters needed to calculate SAR were reported. It has been noted that SAR was reported as required in the 1997 AHR. The report was in general compliance with permit and regulatory requirements, and indicates that observed impacts are in compliance with probable hydrologic consequences projections contained in the permit. Please contact me if you have any questions. Sincerely, ~~ Dan .Mathews Environmental Protection Specialist cc: Denver AHR File rside\96ahr.ltr