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~~MOUNTAIN COAL <br />~ COMPANY~.t..~. <br />A Subsidiazy ofArch Wes[erv Resources, IZC <br />July 31, 2006 <br />Mr. Chris Gates <br />RECEIVED <br />AUG 0 3 2006 <br />pplfgn of Minerals end Gedogy <br />Colorado Department of Public Health and the Environment <br />Water Quality Control Division (WQCD), Enforcement and Compliance Section <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 <br />West Elk Mine <br />P O Box 591 <br />5174 Highway 133 <br />Somerset, CO 81434 <br />(970) 929-SOI S <br />Fax (970} 929-5595 <br />Re: Mountain Coal Company, LLC (MCC), West Elk Mine, CDPS Permit No. CO-0038776, <br />Discharge Monitoring Reports for the Second Quarter 2006. <br />Deaz Mr. Gates: <br />Attached aze the Discharge Monitoring Reports (DMRs) for the second quarter of 2006. Also attached <br />aze the Biomonitoring reports from the EndlroChem Analytical, Inc. dated Apri12006, for Outfa11017. <br />The dischazge from Outfa11017, is experiencing high alkalinity values resulting in failure of the <br />biomonitoring tests in Daphnia magna populations, however the second quarter tests show that both <br />species passed. <br />Should you or your staff have questions or need additional information concerning these Dischazge <br />Monitoring Reports, please contact me at (970) 929-2238. <br />Sin `~~Ce~lta-e.- <br />enry B e <br />Environmental Engineer <br />Enclosures; NPDES Forms (DMRs) for 2nd Quarter 2006 <br />cc: Tom Kaldenbach - CDMG <br />Availability of Records File -NPDES <br />