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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, was reclaimed in 2007. The reclaimed facility is located, <br />as shown on Figure 2.2-6, within the Munger Canyon permit area, along the toe of the <br />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 was from low quality <br />coal areas, roof falls, and coaly sediment derived from the sediment pond and ditches. <br />The total disturbed and reclaimed area of the rock disposal operation is <br />approximately 3.6 acres, including the required, stockpiles and sedimentation controls. <br />The final capacity of the reclaimed refuse disposal site was less than 5,000 cubic yards. <br />Section D-D on Figure 2.2-7 is a typical cross section of the fill design. <br />Waste rock was transported from the McClane Canyon Mine. The coal mine <br />waste was dumped at or near the final disposal location and spread by tractor or dozer. <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 />2.2.5i 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 was placed in the <br />topsoil stockpile located north of the sediment pond, across the haul road. This topsoil <br />pile contained about 1500 cubic yards which was sufficient to cover approximately 1.2 <br />acres 9.6" deep. The 1.2 acre figure is the area of the refuse disposal site, coverfill pile <br />and sediment pond that will receive topsoil. Reclamation of the sediment pond and a <br />portion of the coverfill pile was postponed until pond removal is approved by DRMS. <br />• <br />RN-05 2-11 09/07 <br />