2012-05-15_PERMIT FILE - C1982056A

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dedicated Washplant Substation required construction of a 40 x 60 foot concrete pad, enclosed by an 8 -foot high chain -link fence and installation of steel supports, transformers, and associated control and electrical switch -gear. Buried connections to the Area 1 Pit and existing freshwater supply line were established to supply make -up and •washdown water for the Washplant II operations. Communications lines were also extended to connect the Washplant facilities with the other existing operations. With completion of Washplant II, the temporary propane tank installations used to feed the large plant heaters during the winter will be replaced with a permanent tank installation on the south side of and within the existing Washplant facilities area. The tank installation will consist of a large 12,000 gallon tank on concrete support saddles and a smaller skid- mounted 3,000 gallon tank. Temporary concrete barriers (Jersey barriers) and earthen berms will be placed to delineate the tank area and provide protection from equipment traffic. Fill and distribution piping will be mounted on pre- fabricated steel or concrete supports, and piping to the Washplant will be buried below grade. Crushing and Sampling Facilities (Modified and Superseded by TR07 -59 for Washplant II) As previously described, the 72 -inch Overland Conveyor transfers coal from both the ROM Coal Stockpile and the Coal Washplant to the Primary Crusher Building. The coal passes through the primary crusher, and is reduced to an 8 x 0 inch size (Note: Coal from the longwall typically meets this size consist, and does not require primary crushing). Following primary crushing, the coal is discharged to a 60 -inch conveyor belt. This belt feeds the coal from the Primary Crusher Building to the Secondary Crusher Building. Feed to the secondary crusher passes over vibratory screens; coal that is less than 2 x 0 inches bypasses secondary crushing and transfers to the belt to the Sampler Building, coal larger than 2 x 0 inches passes through the secondary crusher, is crushed to -2 -inch and discharges to the Sampler Building belt. A 2,000 gallon diesel fuel tank and containment is located on the northeast corner of the Primary Crusher building to allow equipment refueling. In the Secondary Crushing Building, another screening process was added for producing stoker coal (' /a to 11 /z inch •product). The stoker coal passes through the stoker screen to the stoker belt, which exits the building and dumps the stoker coal into either a small stockpile or directly into a haul truck. Dust from all of the belt transfer points located inside of the building is controlled by enclosures manifolded to the existing baghouse. A stoker oil tank is located next to the buildings and the oil is sprayed onto tjie stoker coal before it is stockpiled. The locations of the stockpile /truck loading areas and the oil tank are shown on Map 24. The stoker oil is piped along the product belt structure and applied to the stoker coal as the coal leaves the belt. The sale of stoker coal is facilitated by a 70 x 10 x 0.5 foot platform truck scale located north of the Mine Office. The scale is mounted in a 90 x 12 x 5 x 1 thick concrete vault. A buried 50 -foot long 110 v. conduit provides power. The coal is conveyed from the Secondary Crusher Building into the Sampling Building, where it passes through the sampling unit. The coal then transfers to the Stacker Tube Conveyor which moves it to the Stacker Tube, located at the finished product (or Batch -Weigh Loadout) stockpile. The coal discharges from the Stacker Tube through a series of doors and forms a conical product stockpile around the stacking tube. Originally, the stockpiled coal was fed by gravity through feeders to the train loading facility. During loading, the train would back through the tunnel under the stockpile to load, with loaded cars following the tail -track around Pinnacle Peak. The location of the track is shown on Map 24. The new Batch -Weigh Loadout replaced this system and, while the prior loadout system components are still in- place, they are not currently utilized. The coal - handling system was modified to incorporate construction of a conveyor belt (Belt- Out -Back (BOB)), drive structure, belt take -up, and control building to move coal from the Secondary Crusher Building to the secondary ROM Coal Stockpile near the Tipple. The locations of the belt, drive structure, and control building are shown on Map 24 (Surface Facilities). •TCC drilled a limited number of shallow holes in the area of the Tipple to provide foundation information for final design of the BOB conveyor. A total of approximately seven 4 -inch diameter holes were drilled, radiating from a point adjacent to the Secondary Crusher Building outward to the secondary ROM Stockpile. An auger rig was used to drill the holes, which varied in depth from 20 to 60 feet. The holes were drilled within the previously disturbed area, and if no ground water was intercepted, the holes were backfilled with the cuttings from the hole. Any hole TRI l -77 2.05 -32.5 07/20/11