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• <br />M AY 0 <br />n <br />EXHIBIT 82 Wing �z s �y <br />West Elk Mine <br />Refuse Pile Expansion East <br />Technical Revision Application - TR 120 <br />Prepared for <br />Mountain Coal Company, L.L.C. <br />West Elk Mine <br />January 2010 <br />Revised March 2010 <br />Revised April 2010 <br />• <br />4700 West 77" Street <br />Minneapolis, MN 55435 -4803 <br />Phone: (952) 832 -2600 <br />BARR Fax: (952) 832 -2601 <br />