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Two sites previously existed for storage of underground development waste; under and adjacent to the waste rock <br />conveyor belt and in the final-cut pit. Construction of the preparntion plant, completed in 1995, eliminated the need to <br />• dispose of low-quality coal and development waste in the pit or haul it to the refuse pile. Instead, the preparation plant <br />allowed processing of these materials to recover the contained coal. The plant was designed to produce a maximum <br />of approximately 500,000 tons of clean coal per year during a normal operating period of April through September. <br />Original projections of clean coal production were approximately 300,000 to 400,000 tons per yeaz. In order to <br />produce this amount of clean coal, approximately 480,000 to 640,000 tons of low quality coal and development <br />waste would be processed annually and approximately 180,000 to 240,000 tons per year of refuse would be <br />generated and hauled to the approved refuse pile. During the period 1995 through 1999, all low-quality coal was <br />removed from the pit for processing through the coal preparation plant. While it was originally planned to operate the <br />plant seasonally, during the period April through September; operational experience and requirements dictated that the <br />plant run yeaz-round. Given this schedule, a maximum of 1.2 million tons of clean coal per yeaz can be recovered from <br />the plant. Based on this production figure approximately 500,000 tons per year of coal refuse is generated and hauled <br />to the refuse pile. <br />At that time that the low-quality coal was removed from the fmal-cut pit, the plan was to haul development waste or <br />oversized materials from the preparation plant to the pit and dump it until it reached within four feet of the approved <br />postmining topography. This did not occur, and the pit is now used for water storage as part of the mine water <br />recycling system. Now, development waste may be temporarily stockpiled adjacent to the waste rock conveyor or in a <br />portion of the low-quality coal stockpile adjacent to the boxcut pit. The amount of waste generated by ongoing mining <br />opemtions dictates when and where the material is stockpiled. Development waste containing a sufficient amount of <br />coal is still processed through the preparation plant. The material is picked up from its temporary stockpiled location <br />and hauled to the preparation plant for processing. <br />With elimination of the final-cut pit as a placement area for low-quality coal, a low quality coal pile was <br />constructed on top of the existing waste rock disposal site. As the pile enlarged it gained in elevation and lay <br />• against the existing spoil south of the waste rock pile. The pile continued to rise along the spoil and eventually <br />covered the existing storage pad south of the waste rock pile. The location of the stockpile is shown on Map 24, <br />Surface Facilities Map. The low-quality coal is transported to the stockpile mainly by trucks, with scrapers <br />augmenting the haul. The material is either end-dumped from the trucks or layed-down by the scrapers. The trucks <br />or scrapers provided adequate compaction of the material as they traverse across the pile. The pile accommodates <br />approximately 700,000 cubic yazds of low-quality coal. Given that the stockpile is located in an old pit area and <br />within the coal handling facilities pad azea, a defined haul road does not exist, rather the trucks or scrapers travel <br />over and within the existing law-quality coal stockpile area. <br />The 68,000 bcy of overburden removed during highwall modification for the mine portals were placed in the Area 1 <br />dragline pit directly south of the excavation. In addition, an east-west ramp was constructed for access to the portal <br />area. Rock from development of the underground mine declines and the ramp was also placed into the pit. The <br />partial excavation averages 250 feet in width, 125 feet into the highwall and 50 feet in depth. There is no need to <br />store spoil for reclamation of this excavation, as the spoils to the south remaining from eazlier surface mining <br />operations will adequately fill the excavation and the remaining dragline pit. <br />In order to accommodate the new coal stockpile, Ditch D-3 was relocated. The new location of the ditch is shown <br />on Map 24, Surface Facilities. It is TCC's intent to keep the existing ditch functioning as long as possible. <br />Preservation of ditch function and the need to relocate the ditch will be related to the expansion of the coal <br />stockpile and the ditch's ability to convey surface runoff to Pond D. Ditch D-3 was divided into these two <br />segments to facilitate design. Sizing calculations for ditch segments D-3-A and D-3-B can be found in Exhibit 8. <br />Ditch segment D-3-A <br />• <br />TR06-52 2.05-87 05/16/06 <br />