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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 <br />low-quality coal and development waste would be processed annually and approximately 180,000 to 240,000 tons <br />+, per yeaz of refuse would be generated and hauled to the approved refuse pile. During the period 1995 through 1999, <br />all 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 nm yeaz-round. Given this schedule, a maximum of 1.2 million tons of clean coal <br />per yeaz can be recovered from the Washplant. Based on this production figure approximately 500,000 tons per yeaz of <br />coal refuse is generated and hauled 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 Washplant to the pit and dump it, until it reached within fow feet of the approved <br />postmining topography. This did not occw, 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 box-cut pit. The amount of waste generated by ongoing mining <br />operations dictates when and where the material is stockpiled. Development waste containing a sufficient amount of <br />coal is still processed through the Washplant. The material is picked up from its temporary stockpiled location and <br />hauled to the Washplant for processing. <br />With elimination of the final-cut pit as a placement azea for low-quality coal, aloes-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 laid-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 azea 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 low-quality coal stockpile area. <br />The 68,000 bcy of overbwden 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 <br />spoil for reclamation of this excavation, as the spoils to the south remaining from eazlier surface mining operations <br />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 will require the placement of conveyor belt, or similar ditch lining in the bottom of the ditch <br />to minimize channel erosion. <br />During 1992 approximately 200,000 tons of low-quality coal were produced and placed in the stockpile. Likewise, <br />during 1993 and 1994, 350,000 tons of low-quality coal were produced and stockpiled. Thereafter, low-quality <br />coal production rates have been variable, with a maximum of approximately 1,950,000 tons per yeaz oflow-quality <br />coal produced and processed. Low-quality coal produced during 1994 was placed in the low-quality coal stockpile. <br />During 1995 and in subsequent years, low-quality coal was placed in aloes-quality coal surge pile for direct feed to <br />the Washplant I, and TCC started recovering the low-quality coal from the existing stockpile at an annual rate of <br />100,000 yards per year until all low-quality coal was removed from the pile. Production records, (ie: truck or <br />scraper load counts), were utilized to estimate of the amount of low-quality coal transported to and subsequently <br />TR07-59 2.05-88 02/27/07 <br />