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MOUNTAIN COAL <br />COMPANYL.L.C. <br />A Subsidiary of Arch Western Bituminous Group, LLC <br />January 08, 2010 <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 />Hand-delivered <br />RtECE1VEp <br />JAN 0 8 2010 <br />Division of KeCWrOW", <br />Afning and salty <br />Re: Mountain Coal Company, LLC, West Elk Mine; Permit No. C-1980-007; Technical <br />Revision No. 120, Refuse Pile Expansion East Area <br />-Dear Mr. Kaldenbach: <br />Mountain Coal Company (MCC) submits the attached information for Technical Revision No. <br />120 to Mining and Reclamation Permit No. C-1980-007 to construct the Refuse Pile Expansion <br />(RPE) East area and associated haul roads and drainage. The engineering and design report <br />for the RPE East facilities is contained in Exhibit 82 in new Volume 10C. Included in the <br />Exhibit are geotechnical analyses and designs for the refuse pile, its haul roads and drainage <br />structures. Baseline site information, analyses and modeling data, as well as monitoring and <br />reclamation plans are also included. <br />The RPE East refuse pile, the haul roads and ditches will be constructed incrementally over <br />the years ahead, as the pile is constructed within the Gulch. As such, only the lower, northem- <br />most section of road will be constructed in the near -term, with the upper sections of road <br />added as the pile rises in the Gulch. In the upper reaches of the pile, the road may be <br />contained within the pile footprint, but as an altemative that would increase refuse disposal <br />volume (that would be lost with the road on the pile), an upper haul road section has been <br />included. <br />Attached are the completed revision form, proposed public notice, revised permit pages and <br />table of contents, revised permit map 53 and new Maps 53C and 54C, as well as new Exhibit <br />82 in Volume 10C. Please feel free to contact me should you have further comments or <br />questions regarding this submittal. <br />Sincerely, <br />Kathleen G. Welt <br />Environmental Engineer III <br />cc: Doug Nolte -MCC <br />Availability of Records File <br />Joanne Williams - Gunnison Co.