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. Placement and Compaction <br />The coal mine waste material will be hauled by truck to the refuse disposal area <br />where it will be spread in maximum lifts of 24 inches and compacted. The top of <br />the pile will be sloped to the east and west to ensure run-off from the fill surface <br />flows to the collection ditches and is not allowed to flow over the outslope of the <br />fill. A berm will be maintained to assure water does not flow over the outslope. <br />Coal mine waste will be placed and compacted to 90 percent of the maximum dry <br />density to prevent spontaneous combustion and to provide the strength required <br />for stability of the refuse pile. Dry densities will be determined in accordance with <br />AASHTO T99-74. The placing and spreading of the coal mine waste will be <br />started at the lowest point of the foundation. The coal mine waste will be keyed <br />into the natural ground. Materials will be spread in approximately horizontal lifts <br />no more than 24-inches thick, and such lifts made uniformly over long stretches. <br />Each lift will be moistened or dried to a uniform moisture content suitable for <br />maximum compaction. Compaction will be carried to the edge of the fills so that <br />the final slopes are firm. The fill will be shaped and benches (terraces) <br />• constructed as shown on Figure 1 and in accordance with the design parameters <br />listed above. <br />Compaction tests will be taken at a frequency and location of not less than one <br />per every other layer, at random locations across the pile. Test locations and <br />results will be reported to the Division in the appropriate construction reports. <br />Coal mine waste materials from activities located outside of the permit area, such <br />as those activities at other mines or abandoned waste piles, will not be placed in <br />the coal mine waste bank unless approved by the Division. <br />• <br />TR30 - 9 - 02/04 <br />