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period of April through September. Original projections of clean coal production were approximately 300,000 to <br />400,000 tons per year. In order to produce this amount of clean coal, approximately 480,000 to 640,000 tons of low- <br />quality coal and development waste would be processed annually, and approximately 180,000 to 240,000 tons per <br />year of refuse would be generated and hauled to the approved refuse pile. During the period 1995 through 1999, all <br />low-quality coal was removed from the pit for processing through the coal preparation plant. While it was originally <br />planned to operate the Washplant seasonally during the period April through September; operational experience and <br />requirements dictated that the plant run year-round. Given this schedule, a maximum of 1.2 million tons of clean coal per <br />year can be recovered from the Washplant. Based on this production figure approximately 500,000 tons per year of coal <br />refuse is generated and hauled to the refuse pile. <br />At the time that the low-quality coal was removed from the final-cut pit, the plan was to haul development waste or' <br />oversized materials (coal refuse) from the Washplant to the pit and dump it until it reached within four feet of the <br />approved postmining topography. This did not occur, and the western portion of the pit is now used for water storage as <br />part of the mine water recycling system. Under current operating practices, development waste may be temporarily <br />stockpiled adjacent to the waste rock conveyor, or in the low-quality coal stockpile area adjacent to the final-cut pit. The <br />amount of waste generated by ongoing mining operations dictates when and where the material is stockpiled. <br />Development waste containing a sufficient amount of coal is still processed through the Washplant. The material is <br />picked up from its temporary stockpile location and hauled to the Washplant for processing. <br />With elimination of the western portion of the final-cut pit as a placement area for low-quality coal, aloes-quality coal <br />pile was constructed on top of the existing waste rock/coal refuse disposal site. As additional material was placed in <br />this stockpile, it grew in size and elevation and lay against the existing spoil to the south, eventually covering the <br />existing storage pad to the south. The location of the stockpile is shown on Map 24, Surface Facilities Map. The <br />low-quality coal/coal refuse is transported to the stockpile mainly by trucks, with scrapers augmenting the haul. The <br />material is either end-dumped from the trucks or laid-down by the scrapers. The trucks or scrapers provided adequate <br />compaction of the material as they traverse across the pile. The pile accommodates approximately 700,000 cubic <br />yards of low-quality coal/coal refuse. Given that the stockpile is located in an old pit area and within the coal <br />handling facilities pad area, a defined haul road does not exist, rather the trucks or scrapers travel over and within the <br />existing low-quality coal/coal refuse stockpile area. <br />The 68,000 bcy of overburden removed during highwall modification for the mine portals were placed in the Area 1 <br />Pit directly south of the excavation. In addition, an east-west ramp was constructed for access to the portal area. <br />Rock from development of the underground mine declines and the ramp was also placed into the Pit. The partial <br />excavation averages 250 feet in width, 125 feet into the highwall and 50 feet in depth. There is no need to store spoil <br />for reclamation of this excavation, as the spoils to the south remaining from earlier surface mining operations will <br />adequately fill the excavation and the remaining dragline pit. <br />[n order to accommodate the new coal stockpile, Ditch D-3 was relocated. The new location of the ditch is shown on <br />Map 24, Surface Facilities. [t is TCC's intent to keep the existing ditch functioning as long as possible. Preservation <br />of ditch function and the need to relocate the ditch will be related to the expansion of the coal stockpile and the <br />ditch's ability to convey surface runoff to Pond D. Ditch D-3 was divided into these two segments to facilitate <br />design. Sizing calculations for ditch segments D-3-A and D-3-B can be found in Exhibit 8. Ditch segment D-3-A <br />will require the placement of conveyor belt, or similar ditch lining in the bottom of the ditch to minimize channel <br />erosion. <br />During 1992 approximately 200,000 tons of low-quality coal were produced and placed in the stockpile. Similarly, <br />during 1993 and 1994, 350,000 tons of low-quality coal were produced and stockpiled. Thereafter, low-quality coal <br />production rates have been variable, with a maximum of approximately 1,950,000 tons per year of low-quality coal <br />produced and processed. Low-quality coal produced during 1994 was placed in the low-quality coal/coal refuse <br />stockpile. During 1995 and in subsequent years, low-quality coal/coal refuse was placed in aloes-quality coal surge <br />pile for direct feed to the Washplant I, and TCC started recovering material from the existing stockpile at an annual <br />rate of 100,000 yards per year until all low-quality coal/coal refuse was removed from the pile. Production records, <br />(ie: truck or scraper load counts), were utilized to estimate of the amount of material transported to and subsequently <br />MR08-230 2.05-88 10/16/08 <br />