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• 2.2.5 Waste Rock Disposal Site <br /> <br />I• <br />A coal mine waste disposal site is planned for waste material generated at the <br />McClane Canyon Mine. The facility will be located, as shown on Figure 2.2-6, <br />within the Munger Canyon permit area, along the toe of the natural slope and <br />adjacent to the road associated with the Munger operation. The coal mine waste <br />generated from the operation during the initial five year permit term is estimated <br />to be 0 to 5,000 cubic yards. The Mclane Canyon Mine has not generated a <br />significant amount of coal mine waste in the past few years. <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 <br />low quality coal areas, rock slopes and from major roof falls. <br />As noted above, it is estimated that up to 5,000 cubic yards of material will be <br />generated from the McClane Canyon operations. The total disturbed area of the <br />rock disposal operation will be approximately 4.9 acres, including the required, <br />stockpiles and sedimentation controls. The capacity of the refuse disposal site is <br />approximately 46,600 cubic yards or 9.3 years at 5,000 cubic yards per year. <br />The maximum height between the toe of the proposed fill and its ultimate top is <br />approximately forty five feet. Section D-D on Figure 2.2-7 is a typical cross <br />section of the fill design. <br />Waste rock will be transported to the disposal site by on highway trucks which <br />will be loaded by front end loaders directly from the work area. Rock will be <br />transported and deposited at the surface by underground equipment for loading <br />into trucks. An intermediate storage area on the mine bench will be used. Water <br />quality controls designed for the mine bench area will suffice for the entire <br />storage and working area. The coal mine waste will be dumped at or near the <br />final disposal location and spread by tractor or dozer. The main function of the <br />tractor or dozer will be to maintain access to the dumping point for the trucks and <br />to distribute and spread the material. The use of this handling equipment will <br />eliminate the buildup of piles and spread the material in layers up to a maximum <br />of two feet thick. <br />M" 2.2-10 9/02 <br />