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~ MOUNTAIN COAL <br />/S~'~ COMPANYL.L.C. <br />A Subsidiary of Arch Western Resources, LLC <br />October 31, 2006 <br />West Elk Mine <br />P O Box 591 <br />;{'~ ~// 5174 Highway 133 <br />RE~~t "~~970)92950151434 <br />NO" O 1 2UOb Fax (970) 929-5595 <br />pivision ofa d Safety n <br />Mimn9 <br />Ms. Cazla J. Lenkey <br />Colorado Departrnent of Public Health and the Environment <br />Water Quality Control Division (WQCD), Enforcement and Compliance Section <br />4300 Cheny Creek Drive South <br />Denver, CO 80222-1530 <br />Re: Mountain Coal Company, LLC (MCC), West Elk Mine, CDPS Permit 1V~o. CO-0038776, <br />Discharge Monitoring Reports for the Third Quarter 2006. <br />Deaz Ms. Lenkey: <br />Attached aze the Dischazge Monitoring Reports (DMRs) for the third quarter of 2006. Also attached <br />aze the Biomonitoring reports from Enviro-Chem Laboratories, July, 2006, for Outfa11017. <br />The discharge from Outfa11017, passed the biomonitoring tests in Daphnia magna populations and the <br />fathead minnow, Pimephales promelas, populations were unaffected. <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 />Si ce ly, a¢~S _ Q <br />Henry azbe <br />Environmental Engineer <br />Enclosures; NPDES Forms (DMRs) for and Quarter 2006 <br />cc: D. Nolte <br />Tom Kaldenbach - DRMS <br />Availability of Records File -NPDES <br />