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MOUNTAIN COAL <br />/COMPANY <br />A Subsidiaryof Arch Western Bituminous Group, LLC <br />July 22, 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 />RECEIVE <br />JUL 277t11 <br />Division of <br />Mining ansi u' <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; Technical <br />Revision No. TR -127, Revised RPE East Refuse Pile Design to Include Colluvium <br />and an Underdrain. <br />Dear Mr. Kaldenbach: <br />Mountain Coal Company, LLC (MCC) submits the attached application form, proposed public <br />notice, and revised Exhibit 82 including attachments and appendices in application of <br />Technical Revision No. TR -127, revising the RPE East design to include leaving colluvium in <br />the prepared refuse pile foundation, as well as an underdrain subdrainage system. The <br />attached cover letter from Barr Engineering provides-more detail on the proposed design <br />change. <br />Please contact me at (970) 929 -2238 or by e-mail should you have questions regarding this <br />submittal. <br />Sincerely, <br />azhip,64d00.41 <br />Kathleen G. Welt, <br />Environmental Engineer III <br />cc: Doug Nolte — MCC <br />Joanne Williams — Gunnison Co. <br />