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MOUNTAIN COAL <br />^} _ COMPANYL.L.C. <br />ASubsidiary of Arch Westem Bituminous Group, LLC <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 />RAC 4V ED <br />JUL 012010 <br />Diviwon ('kex'a;?>•#on, <br />RAlnitug and Eay&y <br />Re: Mountain Coal Company, LLC, West Elk Mine; Permit No. C-1980-007; Quarterly <br />Summary of Subsidence Observations, 1St Quarter 2010 <br />Dear Mr. Kaldenbach: <br />Mountain Coal Company, LLC (MCC) began longwall mining the E-seam in late November <br />2008. By the end of 1 st quarter 2010, MCC had mined up to cross-cut 12 in panel E1. The <br />area potentially affected by mining was inaccessible because of snow cover and consequently, <br />the ground surface was likely not visible. Mining was not within a mile of Monument Dam or <br />within the angle of draw of any Forest Service road. A stock pond at cross-cut 7 was within <br />twice the angle of draw towards the end of the quarter. The stock pond was surveyed in July <br />2009 and was included in the 2009 Fall Subsidence Report. The stock ponds at cross-cut 17 <br />and 7 will be inspected again for post mining effects when road and weather conditions permit. <br />Routine inspection reports for Monument Dam and Forest Service roads are included with this <br />letter. For the period of time before snow, there were no visible signs of subsidence induced <br />features. <br />Sincerely, <br />Ryan . Sweetwood <br />Environmental Engineer <br />cc: Doug Nolte -MCC <br />Ryan Taylor- USFS