2021-08-06_PERMIT FILE - C1982056A (2)

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General Coal-Handlin - The coal discharges from slope -belt at the portals through a flop -gate that can be used to divert low -quality coal to the Low -Quality Coal Conveyer. Based on a maximum anticipated raw coal production tonnage of 13.OMM tpy, approximately 2.OMM tpy of low -quality coal will be diverted to the Low -Quality Coal Conveyor, with the remaining I i .OMM tpy of Run -of -Mine (ROM) coal transferring to the ROM Coal Conveyor, which carries to coal to the ROM Stacking Tube. Coal discharges through openings in the Stacking Tube to form the ROM Coal Stockpile. Coal is reclaimed from the ROM Stockpile by a sub -grade reclaim system and transferred to the elevated Crushing/Screening Building Feed Conveyor. The option exists that if downstream portions of the coal -handling system are inoperable due to break -downs or maintenance, coal can be recovered from the ROM Stockpile by x\heel-loader, loaded into trucks, and transferred by truck to the Batch -Weigh Coal Stockpile for loading and shipment. The Crushing/Screening Feed Conveyor discharges to the Crushing/Screening system where the coal passes through a series of double -deck screens which separate the coal stream into three size fractions, an under -size fraction (-/" x 0"), which passes through and discharges directly to the Overland Conveyor: an intermediate fraction (/" x 2"), which transfers to the Wasllplant Feed Conveyor, and the screen oversize (+2"). �\hich discharges to a two-stage crushing circuit, with the crushed product transferring to the Washplant Feed Conveyor. Bypass chute -work allows the intermediate and crushed products to be diverted directly to the Overland Conveyor, if plant feed coal quality precludes the need for washing. The Washplant Feed Conveyor transfers the intermediate and crushed coal products from the Crushing/Screening Building to the Washplant 11 Building, where a series of screens, heavy -media cyclones, classifying cyclones, wash screens, and centrifuges produce coarse and fine coal products, which are combined and discharge to the Overland Conveyor. Coarse refuse from the wash process is drained and transferred by the Coal Refuse Conveyor to the Refuse Bin, where it is loaded into trucks and hauled to the existing permitted Coal Refuse Disposal Area. The fine refuse passes to the Thickener, which partially dewaters the refuse and then discharges the fine coal refuse slurry to the existing Thickener Underflow Line. The Thickener Underflow Line carries the fine refuse slurry through an existing borehole to an area of sealed underground mine workings for disposal. The Overland Conveyor carries the coal product stream to the Belt -Out -Back (BOB) area, where it passes through the Primary and Secondary Crusher and Sampling Buildings (direct pass-through w/equipment removed or bypassed). A new Coal Sampling Station, to the west of Sedimentation Pond D, samples the product coal stream on the Overland Conveyor. From the Sampling Building, the coal product stream can be routed to either the BOB Coal Stockpile or the Batch -Weigh Coal Stockpile. Coal reclaimed from the BOB Stockpile is routed back through the Sampling Building to the Batch -Weigh Coal Stockpile. From the Batch -Weigh Stockpile, coal can be reclaimed by the Batch -Weigh Loadout Conveyor and/or the Truck Loadout Conveyor, allowing coal to be loaded directly to either over -the -road trucks or unit trains for shipment. Low -Quality Coal Handling — The Low -Quality Coal Conveyor discharges to a temporary pile, and the low -quality coal is then moved by �N heel -loader to the Washplant I Grizzly Feeder. Coal is transferred from the Grizzly Feeder by conveyor to the intermediate Washplant I Feed Stockpile. A sub -grade reclaim conveyor transfers the coal from this stockpile to the Washplant I Building, where a series of screens, heavy -media cyclones, classifying cyclones, wash screens, and centrifuges produce coarse and fine coal products. A portion of the washed coarse coal output transfers by conveyor to the Stoker Coal Stockpile, where a Stoker Coal Loading Conveyor is used to load over - the -road trucks. The remainder of the Washplant I clean coal output (both coarse and fine coal) can be routed to either a small Clean -Coal Stockpile adjacent to the Washplant, or to the Overland Conveyor. Coarse and fine refuse from Washplant i are handled in a manner similar to that previously described for Washplant II, with the coarse refuse transferring by conveyor to a Refuse Bin for truck loading and haul to the Refuse Pile, and the fine refuse passing through a Thickener, and then being discharged to the Thickener Underflow Line for disposal in an area of sealed underground mine workings. Historical Information (Superseded) - Two sites previously existed for storage of underground development waste: under and adjacent to the waste rock conveyor belt and in the final -cut pit. Construction of the Washplant I, completed in 1995. eliminated the need to dispose of low -quality coal and development waste in the pit or haul it to the refuse pile. Instead, the Wasllplant allowed processing of these materials to recover the contained coal. The Washplant was designed to produce a maximum of approximately 500,000 tons of clean coal per year during a normal operating MR 16-300 2.05-87 06/21/16