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2.2-10 <br />2.2.5 Waste Rock Disvosal Site <br />• A rock disposal site is planned for waste material realized during <br />the underground development of Munger and McClane Canyon operations. <br />The facility will be located, as shown on Figure 2.2-6, within the <br />Munger Canyon permit area, along the toe of the natural slope and <br />adjacent to the road associated with the Munger operation. The <br />development waste rock generated from the two separate operations <br />during the initial five year permit term is estimated to be 25,000 <br />cubic yards. The disposal of this volume is considered herein. <br />The waste rock fill consists of rock fragments generated during <br />development stages of the mining operations. The majority of the <br />material will be from development of the rock slope to provide <br />access to the Carbonera Seam. The remainder of the material will be <br />from major roof falls in the mine. No processed coal waste will be <br />disposed of at this location. In the event that market conditions _61 <br />dictate the need for coal washing, additional permitting will be ?~ <br />undertaken and will address both a wash plant and a refuse disposal <br />site. At that point in time, the now proposed waste rock site will <br />either be abandoned and reclaimed or continued on a limited scale <br />for materials other than processed coal refuse. Abandonment and <br />reclamation are addressed later in this section and in Chapter 3.0, <br />Reclamation Plan. <br />As noted above, it is estimated that approximately 25,000 cubic <br />. yards of material will be realized from this and the McClane Canyon <br />operations over the development stages of each. The total area of <br />the rock disposal operation will be approximately 2.6 acres <br />including the required hydrologic and sedimentation controls. The <br />maximum height between the toe of the proposed fill and its ultimate <br />top is approximately thirty fivE-£~et. Section A-A of Figure 2.2-7 <br />is a typical cross section of the fill design. <br />Waste rock will be transported to the disposal site by on highway <br />trucks which will be loaded by front end loaders directly from the <br />work area. Rock will be transported and deposited at the surface by <br />underground equipment for loading into trucks. A~intermediat_e_ <br />storage area on the_mine bench_will_be used Water quality controls <br />designed for the mine bench area will suffice for the entire storage <br />and working area. The waste rocks will be dumped at or near the <br />final disposal location and spread by tractor or dozer. The main <br />function of the tractor or dozer will be to maintain access to the <br />dumping point for the trucks and to distribute and spread dumped <br />rock material. <br />The use of this handling equipment will eliminate the buildup of <br />piles and spread the material in layers up to a maximum of_two feet <br />thirk• Compaction of the material will be by the handling and <br />spreading operation. No special compaction equipment will be used. <br />C 1 <br />B ~~ <br /> <br />