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Mountain Coal Company Exhibit 51 West Elk Mine Lower Retuse Pile • Placement of cover, including topsoil seedbed preparation and revegetation of all phases of the pile and the conshvction of sediment wntrol ditches wiU be done in accordance with Section 2.05.4 of the MRP. Revegetation success will be measured in accordance with Section 2.05.4 of the MRP. The drainage control features (sediment ditches and sedimentation pond) will remain in place or be modified as necessary following reclamation of all five phases of pde conswction until the reclaimed refuse area is in wmpliance with the regulations set forth in Section 4.05.2(2) of the Colorado Mined Land Reclamation Board for Coal Mining. At such time, the ditches will be backfilled and reclaimed in accordance with Section 2.05.4 of the MRP. The clean water ditch (DCW-2) will remain open in order to direct upland run-0ff away from the pde for discharge into Sylvester Gulch. (Reclamation ofthe sedimentation pond is described in the permit revision for "Redisturbance of the U.S. Steel Laydown Area" submitted and approved in 1984). MCC will utilize the best technology curtendy available to reduce erosion on the reclaimed slopes of the refine pile to reduce rillutg and loss oftopsod. As the surface owner, Atlantic Richfield intends to keep the access road up Sylvester Gulch open following reclamation of the pile to allow access to the Sylvester Gulch fan site and areas to the south. The collection ditch at the tce of the pile will be maintained until final reclamation and bond release. At the end of the life of the mine, a berth will be placed between the road and ditch. Ditch maintenance would be impeded if such barriers or bemts were placed during active operation of the pile. A bens or rock barrier will also be placed at final reclamation across access points to the top of the pde to block normal vehicular access. • 38