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M_ OUNTAIN COAL West Elk Mine <br />COMPANY Box 591 <br />517 <br />5174 Highway 133 <br />L.L.C. Somerset, CO 81434 <br />A Subsidiary of Arch Westem Bituminous Group, LLC (970) 929 - 2200 <br />Fax (970) 929 -5050 <br />January 13, 2011 'V 'E <br />JAN 7 ,4 1 <br />Mr. Tom Kaldenbach 4rv ' S 'On of <br />Colorado Division of Reclamation Mining and Safety 4411n'n9 art <br />Office of Mined Land Reclamation <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Re: Mountain Coal Company, LLC, West Elk Mine; Permit No. C- 1980 -007; Quarterly <br />Summary of Subsidence Observations, 4 Quarter 2010 <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 3 quarter 2010. MCC had longwall mined up to <br />cross -cut 31 in panel E2 by the end of 0 quarter 2010. 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 or within the angle of draw of any Forest Service road. Several stock ponds were <br />undermined without any notable effects. The stock ponds will be inspected again for post <br />mining effects when road and weather conditions permit. Routine inspection reports for <br />Monument Dam, Forest Service roads, and stock ponds are included with this letter. For the <br />period of time before snow, there were no visible signs of subsidence induced features. <br />Sincerely, <br />4�7 1 T E� � <br />Ryan V. Sweetwood <br />Environmental Engineer <br />cc: Doug Nolte —MCC <br />Ryan Taylor — USFS <br />