2010-06-04_PERMIT FILE - C1982056A (9)

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The building consists of three connected modular steel containers (2 - 8 x 40 x 10 feet high, and 1 -8 x 20 x 10 feet high), located on the north side of the Overland Conveyor and Washplant II. The building sets on a reinforced . concrete slab floor (20 x 60 x 0.75 feet thick). A new Coal Sampling Station, located on the Overland Conveyor, to the west of Washplant II and Sedimentation Pond D, was installed to provide sampling capabilities prior to discharge to the BOB stockpile. The coal sampling system consists of an automated sweep sampler, which cuts samples from the coal stream on the Overland Conveyor at regular intervals, a small sample crusher, a sample splitter to reduce sample volume, and associated chute -work and control and dust collection systems. The coal sampling system is housed in a steel frame building with steel siding and roof (20 x 20 x 25 feet high), located on the south side of the Overland Conveyor. The building sets on a reinforced concrete slab floor (22 x 22 x 0.75 feet thick). A new 69 KV distribution line was extended approximately 300 feet from the existing 69KV line to a new substation location adjacent to the Overland Conveyer. Powerline construction involved the limited disturbance required to place 4 powerpoles, with pole placement avoiding the Foidel Creek buffer zone. Installation of the new 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 Il, 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 ('/ to 1 %2 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 the 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. MR09 -238 2.05 -32.4 06/26/09