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2.2.5 Waste Rock Disposal Site <br />The coal mine waste disposal site used to dispose of waste material generated <br />at the McClane Canyon Mine is scheduled to be reclaimed in 2007. The facility is <br />located, as shown on Figure 2.2-6, within the Munger Canyon permit area, along the <br />toe of the natural slope and adjacent to the road associated with the Munger operation. <br />The coal mine waste rock consists of coal fines and rock fragments generated <br />during development stages of the mining operations. The material will be from low <br />quality coal areas, rock slopes and from major roof falls. <br />The total disturbed area of the rock disposal operation will be approximately 3.6 <br />acres, including the required, stockpiles and sedimentation controls. The capacity of <br />the refuse disposal site, if reclaimed in 2007, is less than 5,000 cubic yards. Section D- <br />D on Figure 2.2-7 is a typical cross section of the fill design. <br />Waste rock will be transported from the McClane Canyon Mine. The coal mine <br />waste will be dumped at or near the final disposal location and spread by tractor or <br />dozer. The main function of the tractor or dozer will be to maintain access to the <br />dumping point for the trucks and to distribute and spread the material. The use of this <br />handling equipment will eliminate the buildup of piles and spread the material in layers <br />• up to a maximum of two feet thick. <br />A new section of haul road was constructed along the toe of the fill and is shown <br />on Figure 2.2-6. <br />The topography of the proposed disposal site varies from essentially level near <br />the toe of the fill to slopes of 1.5H:1 V or steeper along the natural slope of the hillside. <br />The surficial soils at the site are of Rivra Loam Variant and Torriorthent series. <br />2.2.51 Topsoil Available for Reclamation <br />Available topsoil ranged from 12 inches in the area of the proposed road <br />relocation to 0 inches in the higher elevations of the disposal site, see Figure 4.7-1. <br />Topsoil availability is discussed in Section 4.7. <br />The volume of topsoil salvaged and available for reclamation is in the topsoil <br />stockpile located north of the sediment pond, across the haul road. This topsoil pile <br />contains about 1500 cubic yards which is sufficient to cover approximately 1.2 acres <br />9.6" deep. The 12 acre figure is the area of the refuse disposal site, covertill pile and <br />sediment pond that will receive topsoil. Reclamation of the sediment pond and a <br />portion of the covertill pile will be postponed until pond removal is approved by DRMS <br />TR-22 2-11 03/07 <br />