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Mountain Coal Company West Elk Mlne Post Office aoz 591 Somerset, Cdorado Bf 434 Teleptsone 970.929.5015 III IIIIIIIIIIIIIIII 999 /\ RGrG~„gin September 22, 1997 Mr. Michael Boulay Colorado Division of Minerals and Geology 1313 Sherman Street, Room 215 Denver, CO 80203 SE? 2 y 1997 RE: Minor Revision No. 225 (Water Tank Topsoil Pile); West Elk Mine; Permit No. C-80-007 Dear Mike: Mountain Coal Company (MCC) requests a minor revision to construct a new topsoil pile upslope of the West Elk Mine's existing potable water tank, located to the west of the portals. Please find enclosed revised permit pages, revised Map 53 and revised Map 54, that include this new topsoil pile. The water tank topsoil stockpile has been designed to contain a maximum of 53,000 CY of topsoil. The footprint of the new topsoil pile is approximately 2.9 acres and will be constructed in a previously undisturbed area. Surface prepazation for the pile will include removing all vegetation within the footprint. A bench, 40-feet in width, will be constructed into the hillside and will be the "key-way" for the topsoil pile. The topsoil in the area of the key-way will be stripped and pushed above and incorporated into the stockpile. Approximately 5,000 to 6,000 cy of subsoil will be removed and utilized for other construction and maintenance projects on the mine site. The water tank topsoil pile has been designed with two small light-use roads for ingress and egress to the pile. The roads will be constructed with road-side ditches to direct any runoffwater to existing ditches, as shown on Map 54. The roads have been added to the light-use road discussion in the permit text. Ditch D1-6 is located approximately 50-feet above the pile and will act as a Clear- water diversion ditch. Drainage off the pile will be contained with a berm, as shown on Map 54. However, MCC has revised the SEDCAD runs for watersheds 8B and 8CC to account for runoff from the pile, and are attached. Ditches D2-8AA and D2- 8B have been revised to account for the small increase of discharge from the contributing watersheds. Because the increase is negligible and the culvert designs will not change, the culvert nomography have not been revised. Tables 43 and 44 have been revised accordingly.