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The Coal Washplant structures are of steel -frame construction with steel siding and roofs, and typical construction <br />techniques were used to erect these structures, including use of a crane or boom truck to set structures, and the use <br />of metal fabricating equipment for construction. The approximate dimensions of the structures are as follows: <br />Washplant Building - 48 x 54 x 76 feet <br />Thickener Tank — 35 -foot diameter x 18 feet deep <br />Refuse Bin - 2 x 54 x 76 feet <br />Transformer Pad <br />Low- quality coal is transported by a front -end loader from the Low - Quality Coal Stockpile to the Plant Feed Grizzly. <br />Coarse material, consisting primarily of 4 -inch plus waste rock, is diverted from the grizzly to a chute and temporary <br />storage area on the north side of the Washplant. This material is periodically recovered, loaded into haul trucks and <br />transported to the approved coal refuse pile for placement and disposal along with the coal refuse generated from the <br />washing process. <br />From the Plant Feed Grizzly, the low - quality coal material is conveyed to the plant for processing. A reclaim tunnel, <br />feed conveyor, and hopper transfer the low- quality coal into the coal Washplant. The plant is designed to process up to <br />approximately 300 tons per hour using a heavy media (magnetite) to separate coal from waste rock inclusions. Two <br />magnetite storage bins (50 and 100 tons) are located adjacent to the plant. A Thickener Tank is constructed adjacent to <br />the plant. An emergency overflow sump adjacent to the plant provides overflow storage capacity in the event a power <br />outage occurs and the Thickener has to be partially or fully drained. The overflow sump is sized to hold the entire <br />contents of the Thickener while maintaining one -foot of freeboard. In the event the Thickener has to be dumped, the <br />material will be pumped back into the system or to Pond D. <br />After the low- quality coal is processed, clean coal is transferred directly onto the Overland Conveyor or transferred via <br />conveyor to a Clean Coal Stockpile adjacent to the Washplant. A front -end loader can be used to transfer the stockpiled <br />clean coal to a feed bin on the Overland Conveyor. The clean coal is then transferred via the Overland Conveyor to the <br />Tipple. The processed clean coal may also be utilized in the production of stoker coal, with the stoker coal stockpile <br />located on the west side of the Washplant. The circular Stoker Coal Stockpile area is located on the west side of the <br />Washplant and encompasses an approximately 120 -foot diameter area centered below the stacking conveyor. The <br />Clean Coal Stockpile is approximately rectangular in shape and encompasses the westernmost portion of the ROM <br />Coal Stockpile area as depicted on Map 24. This area is approximately 200 x 250 feet. Up to three feet of coarse rock <br />material (coarse refuse from the grizzly) was laid down as base course in these areas. In total, 1,260 yards are spread <br />under the stoker pile and 5,560 yards are spread under the clean coal pile. This material will be excavated and relocated <br />to the approved refuse disposal area during reclamation of the Washplant facilities. <br />The refuse material generated during the washing process is transferred via a conveyor belt to a Refuse Bin. Refuse is <br />transferred from the bin to haul trucks which transport the refuse to the designed Coal Refuse Disposal Facility. In <br />order to reduce the amount of refuse hauled to the refuse pile, TCC pumps the thickener underflow (refuse fines mixed <br />with water) directly into abandoned and sealed underground workings. The material is pumped into the mined -out <br />longwall panels in the Eastern Mining District. The underflow is pumped via a 4 -inch line to an existing fresh water <br />borehole into the mine. The bottom of the borehole is plumbed into a pipeline terminating at a discharge point located <br />behind the seals in the EMD. The process is described in greater detail under Rule 2.05.3(9). <br />On completion and commissioning of the Coal Washplant, TCC temporarily stockpiled material generated during <br />the start-up period to allow sampling and evaluation of the quality of the reject material being produced and the <br />percent recovery of coal from the feed coal material, in order to better understand the functioning of the plant. This <br />material was stockpiled at a site on the existing Low- Quality Coal Stockpile. The material was tested to determine <br />if the plant was producing the quality of washed coal projected in the design, and to determine if the physical <br />characteristics of the refuse material produced were consistent with the parameters used in designing the Refuse <br />0 Pile <br />TR07 -59 2.05 -30 02/27/07 <br />