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MOUNTAIN COAL <br />~=~`° ~ COMPANYL.L.C. <br />A Subsidiary of Arch Western Resources. LLC <br />August 19, 1999 <br />Mr. Jim Burnell <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Q'N15i0n 01 Minerals 8 Geology <br />RECEIVED <br />AUG 23 1999 <br />RE: Minor Revision No. 263 (New Structures at the TLO); West Elk Mioe; <br />Permit No. C-80-007 <br />III IIIIIIIIIIIII III <br />West Elk Mine <br />P O Box 591 <br />5174 Highway 133 <br />Somerset, CO 81434 <br />(970)929-5015 <br />Far (970) 929-5595 <br />Mountain Coal Company, L.L.C. (MCC) submits the enclosed minor revision application to <br />replace the 3,000 gallon tank that stores diethylene glycol at the train loadout site with a 15,000 <br />gallon tank, to construct a concrete pad under the tanks, and to construct aclean-up concrete <br />bunker. Please find enclosed an application form, a diagram of the concrete clean-up bunker, <br />and a revised permit page that reflects the installation of these new structures. <br />The larger tank will be double-walled, to provide aself-contained secondary containment, and <br />constructed of polyethylene. The tank will be 12'-3" in diameter and the overall height will be <br />19'-5". The 9,800-gallon tank will remain. The installation of the lazger tank will require less <br />frequent fill-ups, which will minimize the potential for a spill from a large tanker truck that is <br />required to access this very congested area to fill the tank. A reinforced concrete pad will be <br />poured for the two tanks. The pad will be a 6-inch slab on grade that is 14' x 28'. <br />MCC also plans to construct a concrete clean-up bunker in the location of the old MB-4 sediment <br />pond. The clean-up bunker will be utilized to make the cleaning up of spilled coal, which <br />occassionaly occurs during the loading process, more efficient. A loader will push the coal into <br />the bunker and then will be loaded out in a truck to be hauled over to the main mine site. A <br />diagram of the clean-up bunker has been included. The dimensions of the bunker are: <br />Slab 20' x 18' (8" thick) <br />25' x 14' (8" thick) <br />(1/2) 4' x 25' (8" thick) <br />Walls 3' x 25' (8" thick) <br />6' x 38' (8" thick) <br />The total amount of concrete for the bunker is 26 CY. <br />Please call if you have any questions. <br />