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MOUNTAIN COAL <br />COMPANY L.L.C. <br />A Subsidiary of Arch Western Bituminous Group, LLC <br />May 4, 2011 <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 />Dear Mr. Kaldenbach: <br />Sincerely, <br />Ryan V. Sweetwood <br />Environmental Engineer <br />cc: Doug Nolte —MCC <br />Ryan Taylor — USFS <br />RECEIVED <br />1•1A`( 0 9 2011 <br />D0 ,crl ul tteciamatcon, <br />Mining and Safety <br />Re: Mountain Coal Company, LLC, West Elk Mine; Permit No. C- 1980 -007; Quarterly <br />Summary of Subsidence Observations, 1 Quarter 2011 <br />Mountain Coal Company, LLC (MCC) began longwall mining the E -seam in late November <br />2008. Lonwall panel El was mined -out by 3 quarter 2010. MCC had longwall mined up to <br />cross -cut 19 in panel E2 by the end of 1 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 />My review found the above - referenced report <br />satisfied the requirement to submit the report <br />and the report contained the required content. <br />The report indicated no subsidence issues. <br />Tom Kaldenbach <br />Enviromnental Protection Specialist Date: s /,? // <br />DRMS Imaging C /180 007 <br />Permit: <br />Class: Reports <br />Type: Subsidence — / <br />Name: Adequacy Memo <br />From: DRMS <br />To: Operator <br />West Elk Mine <br />P.©. Box 591 <br />5174 Highway 133 <br />Somerset, CO 81434 <br />(970) 929 -2200 <br />Fax (970) 929 -5050 <br />COLORADO <br />DIVISION OF <br />RECLAMATION <br />MINING <br />SAFETY <br />