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All soil stockpiles will be stabilized with the perennial seed mixture presented in Table 57, Topsoil Stockpile Seed <br />Mixture. All existing soil stockpile locations are shown on the Drainage and Sediment Control Map (Map 26). The <br />following tables indicate the soil stockpile locations, volumes, and soil replacement areas and depths: <br />Table 58, Topsoil Replacement - No. 5 Portal and General Area <br />Table 59, Topsoil Replacement - No. 5A Portal and General Area, Old Shop, Carpenter Shop <br />Table 60, Topsoil Replacement - No. 9 Portal and General Area, Waste Disposal Pile <br />Table 61, Topsoil Replacement - No. 9A Portal Area <br />Table 62, Topsoil Replacement - Miscellaneous Sites at Mine <br />Overburden <br />Since the Williams Fork Mines and previous associated operations are underground mining operations, there has been <br />very little movement of overburden. Previous limited surface mining activity ceased many years ago and the <br />associated surface disturbance areas have been reclaimed. Refer to Section 2.05.4 Reclamation Plan for reclamation <br />details. <br />Coal - Handling Structures <br />A detailed discussion of coal- handling structures is provided in the previous "Mine Facilities" section. <br />Coal Processing Waste and Non -Coal Processing Waste <br />All non -coal processing wastes are transported off -site and disposed of in the Moffat County Landfill except sludge <br />from the sandtraps and bottom of the oil/water separators. This material, which is largely dirt and road grime with <br />minor amounts of oil cleaned off mining vehicles and shop floors is tested for RCRA characteristics to assure it does <br />not qualify as hazardous waste, and then disposed of in the approved refuse piles. Test results are kept on file. These <br />materials will be spread -out and compacted at the waste disposal sites along with the underground development waste. <br />It is estimated that 10 to 40 cy per month of this material is produced when the Mine is in full production. <br />Underground Development Waste <br />During active production, MCM would produce underground development waste from two sources: rock ramps or <br />boreholes between seams and coarse reject from run -of -mine coal. MCM may store development waste underground <br />in compliance with MSHA regulations or transfer this material by conveyor to the surface for disposal at approved <br />waste disposal sites maintained in compliance with applicable MSHA and CDRMS regulations. Although MCM does <br />not have a coal preparation plant, coarse reject waste rock is physically separated from the run -of -mine coal at the 5A <br />Yard rock diversion chute or rotary breaker located at the screening and sizing building. <br />Two approved waste disposal sites have been established, as shown on the Structures and Renewable Resources Map <br />(Map 25). When operational constraints restrict immediate transfer of waste to the permanent disposal sites it will be <br />temporarily stored in the 5A Yard at the locations shown on Map 26. A maximum of 3,000 cubic yards will be stored <br />in the 5 A Yard. This material will then be transferred from the temporary storage areas to the permanent disposal <br />sites within 60 days. Any problems resulting in the need for additional time and storage volume will be addressed on <br />an individual occurrence basis. <br />Waste Disposal Site <br />The CMLRD approved this waste disposal site in 1983. Mr. Robert W. Thompson of CTL/Thompson, Inc. of <br />Denver, Colorado completed the geotechnical design and analysis of the waste disposal site. The design methodology <br />and relevant operating requirements for the site are presented in Exhibit 21, Waste Disposal Site. <br />TR14 -36 2.05 -18 Revised 03/04/14 <br />