2011-03-18_PERMIT FILE - C1981044A (4)

Home Browse Search

No. 9 Coa] Refuse Disposal Site (Approved) Reclamation of the presently approved coal refuse disposal site will be a continuing process and will be initiated once the refuse pile has been filled to the design capacity. Due to the uneven topography, primary pile construction will begin near its southern limit, and continue to the north and west until the first lift is level. Once the initial lift is level, construction will generally be from north to south. Lift thicknesses will be about 24 inches and each lift will be compacted to 90 percent of the maximum dry density (T_99 or equivalent). pile construction specifications are presented Exhibit 21, Waste Disposal Site. Once the pile reaches its designed capacity and configuration, a minimum of two feet of non-toxic material will be placed as cover on the pile. Because the No.9 Mine face-up area will be filled with waste material, the original fill material in the berm around the face-up (approximately 185,000 cubic yards) will be used for the four feet of non-toxic cover on the present refuse pile. The remainder will be placed on the No.9 Mine yard. Before additional material is placed on the refuse disposal area, BTU-EC will complete an evaluation and demonstrate that sufficient material is available to provide the required four- foot cover, and will address recovery and stockpiling of the non-toxic cover material. Topsoil will be distributed over the area to a minimum depth of six (6) inches. After redistribution of topsoil, the topsoil will be sampled and analyzed and any necessary amendments will be added to provide a suitable plant-growth media. The area will be drill-seeded using a rangeland seed drill with the rangeland/wildlife seed mixture at a rate of 17.25 pounds/acre, and returned to a land- use of rangeland/wildlife habitat. In the event the mixture is broadcast seeded, the seeding rate will be doubled. The area will then be straw mulched with the mulch applied at the rate of two tons/acre. . Solid Waste Disposal Facility Any non-hazardous debris resulting from demolition of mine buildings and facilities, and/or other materials, as defined in Rule 4.11.4, Disposal of Non-Coal Waste, may be disposed of in a permitted Solid Waste Disposal Facility. The proposed solid waste disposal area covers approximately 4.5 acres in section 32, adjacent to the existing coal refuse pile and No. 9 Portal Area, as shown on Map 25, Structures and Renewable Resources. The facility will be constructed and reclaimed in accordance with applicable provisions of Rule 4.11.4, Disposal of Non-Coal Waste. The disposal area will be excavated, as-needed, to provide for effective waste containment and to assure that sufficient material is available to cover the non-coal waste material with a minimum of two feet of soil material. The excavation will maintain at least an eight foot barrier of soil material between the adjacent coal refuse waste pile and the non-coal disposal area, and excavation depth will be limited so that the bottom of the excavation is well above the natural ground water table in the area. The total area for this facility is approximately 4.5 acres, however, only a portion of the area will be in active use at any given time. Waste materials will be placed, spread, and compacted to assure long-term stability. If the waste disposal area is used for non-coal wastes that could be subject to wind-loss or vector infestations, or which may be flammable, sufficient cover material will be maintained in stockpile to both meet applicable final cover requirements, and provide for temporary cover requirements. A temporary cover of inert soil material will be placed over active disposal areas, as needed, to minimize the • potential for wind-loss and provide vector control. Surface drainage will be controlled by the ditch and pond system already in-place, as shown on Map 26, Drainage and Sediment Control Plan. TR07-34 2.05-29 ld/31/07