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West Elk Mine <br />storage area. Run-of--mine coal is fed directly to these tubes. Bulldozers push the coal into <br />the hoppers feeding the underground reclaim system and into the crusher. The stacking tube <br />facility consists of three stacking tubes ranging in height from 91 to 94 feet and are <br />constructed of reinforced concrete. On top of each stack tube is a transfer structure. The <br />transfer structures are approximately 38 feet tall, open steel structures. The facility also <br />includes a 60 foot tall feed conveyor drive tower and a 42 foot high crusher building. Both of <br />these are open steel structures. An as-built construction description is provided in Exhibit 68. <br />Screening Facility <br />Construction of a screening facility was begun in 1992 and became operational in February of <br />1993. The facility is used to separate over-sized material (typically consisting of rock) from <br />the product-sized coal. The screening facility consists of an open steel structure with a <br />maximum height of 84 feet and three associated conveyors. A 1,500 tons per hour high-angle <br />conveyor transfers material to the screening plant from the crusher, product-sized coal is <br />transported to the silo conveyor belt on a 1,500 tons per hour conveyor and a 300 tons per <br />hour high-angle conveyor transports over-sized material to the rotary breaker. An as-built <br />construction description is provided in Exhibit 68. <br />Storage Silos <br />Two silos provide temporary storage for product coal. These silos provide the storage <br />capacity needed to accommodate MCC's production schedules and use of unit trains for <br />shipping product coal from West Elk Mine. The reinforced concrete silos provide about <br />24,000 tons of product coal storage capacity. The silos were designed to reduce the hazard of <br />spontaneous combustion by minimizing dead storage areas within the silo compartments. <br />Crushed coal Stacktube and Underground Reclaim <br />A 48-inch width conveyor belt will transport crushed coal from the top of Silo No. 2 to the <br />stack-tube. This stack-tube will be approximately 106 feet in height and will be constructed <br />similarly to the run-of--mine coal stack-tubes. The transfer structure on the top and the reclaim <br />tunnel and conveyor belt underneath the area will also be similar in construction to the run-of- <br />mine coal stack-tube facilities. A dozer trap and reclaim system to be located just west of the <br />silos will similarly be constructed, as well. <br />Loadout Facility <br />MCC uses apre-weigh, over-the-track type of loadout facility at West Elk Mine. In this <br />facility, a surge bin receives the coal from the loadout conveyor. The coal is then transferred <br />to a weigh bin. Finally, the weigh bin drops a measured amount of coal into a railroad car via <br />a chute. The capacity of this system is 6,000 tons per hour. Two, double-walled (self- <br />contained secondary containment) polyethylene tanks are located west of the loadout building <br />to contain antifreeze (diethylene glycol) for treatment of coal and railcars for winter shipment. <br />One 12-foot diameter tank contains approximately 15,000 gallons of antifreeze to spray on the <br />2.05-43 Revised November 2004 PR10; Rev. March 2006; Rev. Apri12006 PRIG; Rev. May 2006 PR10; Rev. January 2009 MR-350 <br />