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A Subsidiary of Arch Westem Bituminous Group, LLC <br />April 18, 2011 <br />Sincerely, <br />MOUNTAIN COAL <br />COMPANYL.L.C. <br />Ms. Kelly Morgan <br />Compliance Monitoring and Data Management Unit <br />Colorado Department of Public Health and the Environment <br />Water Quality Control Division (WQCD) P -B2 <br />4300 Cherry Creek Drive South <br />Denver, CO 80222 -1530 <br />Re: Mountain Coal Company, LLC (MCC), West Elk Mine, CDPS Permit No. CO- 0038776, <br />Discharge Monitoring Reports for the First Quarter 2011. <br />Dear Ms. Morgan: <br />Attached please find the Discharge Monitoring Reports (DMRs) for the Mountain Coal Company, LLC <br />(MCC) West Elk Mine for the 2nd Quarter of 2011. During the 2nd quarter, there was one (1) exceedance <br />at Outfall 014. A summary of the exceedance is provided below. <br />1. Exceedance of "pH DAILY MAX" at Outfall 014. <br />a. Outfall 014A receives stormwater runoff from a small compacted gravel area with a few <br />buildings and no exterior activity. It also receives runoff from cut slopes and vegetated <br />areas. All BMPs were in place. Two pH samples were taken in May, one of which <br />exceeded by 0.2 su. Only one sample per month is required by the permit. As stated <br />in prior communications with the state, the field pH has historically been high, and <br />MCC is unsure what may have caused this slight increased pH event. MCC <br />continues to investigate the issue and may pursue an increase in the permit limit. <br />Should you or your staff have questions or need additional information concerning these Discharge <br />Monitoring Reports, please contact me at (970) 929 -2308. <br />Ryan Sbetwood <br />Environmental Engineer <br />Enclosures: NPDES Forms (DMRs) Second Quarter 2011. <br />cc: D. Nolte <br />T. Kaldenbach - CDRMS <br />Availability of Records File - NPDES <br />RECEIVED <br />JUL 2 82011 <br />Division or r.eciamation, <br />Mining and Safely <br />West Elk Mine <br />BD, Box !191 <br />5174 highway 133 <br />Somerset, Ct0 81434 <br />(970) 929.220© <br />Fax (970) 92'P -5050 <br />