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MOUNTAIN COAL <br />COMPANYL.L.C. <br />A Subsidiary of Arch Western Bituminous Grasp, LLC <br />May 4, 2011 <br />RECEIVED <br />MAY 0 9 2011 <br />D,vtstun o. i{eciamalion, <br />Mining and Safety <br />Mr. Tom Kaldenbach <br />Colorado Division of Reclamation Mining and Safety <br />Office of Mined Land Reclamation <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />West Elk Mine <br />P.O. Box 591 <br />5174 Highway 133 <br />Somerset, CO 81434 <br />(970) 929-2200 <br />Fax (970) 929-5050 <br />Re: Mountain Coal Company, LLC, West Elk Mine; Permit No. C-1980-007; Quarterly <br />Summary of Subsidence Observations, 1St Quarter 2011 <br />Dear Mr. Kaldenbach: <br />Mountain Coal Company, LLC (MCC) began longwall mining the E-seam in late November <br />2008. Lonwall panel E1 was mined-out by 3Id quarter 2010. MCC had longwall mined up to <br />cross-cut 19 in panel E2 by the end of 1St quarter 2011. The area potentially affected by <br />mining was inaccessible for the quarterly site inspection because of snow cover and <br />consequently, the ground surface was not visible. Mining was not within a mile of Monument <br />Dam. Mining was within the angle of draw of the Dry Fork US Forest Service Road, Lower <br />Cow Camp, Lower Cow Camp Spring, and the Dry Fork of Minnesota Creek. These land <br />features and man-made structures were inspected in the 2nd quarter when road and weather <br />conditions permitted, and these inspections will be included in the Spring 2011 Semi-annual <br />Subsidence Report. Routine inspection reports for Monument Dam, Forest Service roads, and <br />stock ponds are included with this letter. <br />Sincerely, <br />V2'-S-4VW'/ <br />Ryan V. Sweetwood <br />Environmental Engineer <br />cc: Doug Nolte -MCC <br />Ryan Taylor - USFS <br />