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recovery of fine coal and decrease the amount of refuse to be disposed of. After the clean coal is <br />separated from the refuse it is mechanically dewatered by vibrating-screen type centrifuges, <br />classifying cyclones, and cross-flow screens. After the coal surface moisture is reduced to 5-7 <br />percent, the clean coal is placed on a conveyor that delivers it to the slot storage. <br />The refuse circuit employs a static thickener and disk filters to dewater the smaller material before <br />it is placed in the refuse bin with the larger refuse. The thickener water is disposed in the sealed <br />1st longwall district of the D-Seam mine. <br />The preparation plant equipment is enclosed in swell-insulated structure. This, combined with the <br />use of a wet process to clean the coal, eliminates any possible dust emissions. All necessary <br />transfer points between conveyors are also enclosed and equipped with water sprays to reduce <br />dust. All conveyors are partially covered or totally enclosed. <br />III.B.3 Refuse Disposal The preparation plant is expected to produce approximately 700,000 <br />tons per year of coal processing waste at full production. This annual tonnage includes mining <br />dilution that results from mining parting, roof and floor material with the coal. <br />The coal processing waste (refuse) is transported to the refuse disposal area (Map 76) by 35 to <br />100-ton end-dump trucks. Since the refuse is high in moisture, it is allowed to dry and is then <br />spread in layers of about 2 feet and compacted. This layering process continues until the <br />maximum fill height is achieved. Compaction will be performed as specified in Section IV.D.3. <br />The landfill operation will progress simultaneously in more than one pile in order to allow adequate <br />time for drying and spreading. Before the operation begins, all available topsoil is removed and <br />stockpiled. This topsoil will be replaced after the maximum fill depth has been achieved and then <br />revegetated. (See Section V, Reclamation Plan). <br />A refuse haul road has been constructed between the D-Portal area and the waste disposal area. <br />Culverts are located where necessary to minimize changes in the existing drainage pattern. A <br />typical refuse haul road cross section is shown in Figure III-3. Water and a chemical stabilizer <br />(e.g. magnesium chloride) are used to reduce dust along the road. <br />111.8.4 Temaorarv Coal Lavdown Area The Deserado Mine caught on fire underground on <br />January 31, 1996. The working districts of the D-Seam had to be sealed. In order to satisfy <br />Permit Renewal #3 (Rev, 8/99) III-30 <br />