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\_MOUNTAIN COAL <br />--~`~~`Y \CQMPQNYLL.C. <br />A Subsidiary of Arch Western Resowces, LLC <br />West Elk Mine <br />POBox 591 <br />5 U4 Highway 133 <br />Somerset, CO 81434 <br />(970) 929-5015 <br />Fax (970) 929-5595 <br />October 1, 2003 <br />Mr. James Burnell <br />Colorado Division of Minerals and Geology (CDMG) <br />Office of Mined Land Reclamation <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />r's~~;~ii!'~® <br />~= ~ 0 62003 <br />:°,n ni ,,,;;~.„1s end Geola3y <br />Re: Mountain Coal Company LLC (MCC}, West Elk Mine; Permit No. C-80-007; Minor <br />Revision No. 299 (MR-299), Shaft No. 1, Mine Ventilation Intake Air Heaters, Construction <br />and Installation. <br />Dear Mr. Burnell, <br />Mountain Coal Company, L.L.C. is submitting this Minor Revision to the Mining and Reclamation <br />Permit to construct and install shaft intake air heaters at the Shaft No.l location in Sylvester Gulch. <br />The proposed project consists of a 12-inch High Density Polyethylene (HDPE) pipeline from Shaft No. <br />3 to Shaft No. 1, a slab on grade (adjacent to Shag No. 1), and a small metal building to house the <br />heaters, pumps and controls. The purpose of the facilities is to warm the mine intake ventilation air <br />during cold weather periods. The shaft heaters will be direct fired and use mine methane from Shaft <br />No. 3 degas pump station. <br />The construction will occur within existing disturbed azeas (Shaft No. 3 degas pad, Shaft No. 3light- <br />use road, and the Shaft No. 1 pad). Existing drainage patterns will be maintained during and after <br />construction. <br />Electric power will be supplied to the new pump building and control room from the existing hoist <br />facilities at Shaft No. 1. Conduits will be buried from Shaft No. 1 to the new building. <br />A 12" HDPE pipeline approximately 2,700 feet long will be fused and buried, approximately 3 feet <br />deep, from the Shaft No.3 location, in the Shaft No.3 light-use road, across the construction lay-down <br />area and Shaft No.l pad to the new building. <br />The pump building will be metal and constructed on aslab-on-grade. Approximately 45 cubic yazds of <br />concrete will be used to construct the slab. The building will contain approximately four electric driven <br />40 HP pumps that will deliver fuel to each of the four combustor units. The building will also house <br />electrical switchgear and controls for operation and monitoring of the heaters. <br />This facility is expected to operate during the life of underground mining operations. Following <br />cessation of mining operations the structures and equipment will be removed from the site including <br />the pipeline. The concrete slab will be demolished and deposited in Shaft No. 1, or transported to the <br />Refuse Pile Expansion (RPE) area for disposal. <br />