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West E!k Mine <br />Anew crushed coal stack-tube and storage area will be fed by 48-inch conveyor from the top of Silo <br />No. 2 to the top of the ST-3 stack-tube. The conveyor belt has a capacity of 1,500 tons per hour. A <br />72-inch underground reclaim conveyor will have the capacity to carry coal from the storage azea to <br />the train loadout belt at a rate of 6,000 tons per hour. A dozer trap and 48-inch reclaim conveyor to <br />be located west of the silos, will have the capacity to reclaim coal from the silo pad of 1,500 tons <br />per hour. <br />A 72-inch belt conveyor carries coal from the storage silos to the over-the-track loadout. This <br />conveyor has a capacity of 6,000 tons per hour and runs at a speed of 850 feet per minute. Total <br />length is approximately 600 feet. The conveyor is covered by asemi-circular corrugated <br />galvanized metal cover. The portion of the conveyor that crosses the North Fork of the <br />Gunnison River is completely enclosed. Primary and secondary walkways were constructed <br />along the conveyor. The conveyor structure is steel. <br />Stacking Tubes, Underground Convevor Reclaim Svstem, and Crushers <br />Construction of three stacking tubes and an underground conveyor reclaim system was begun <br />during 1991 and became operational in July of 1992. The approximately ]00,000 to 120,000 <br />tons ofrun-of--mine coal storage provided by these tubes is needed to handle the higher longwall <br />production volumes. The storage area will be expanded by moving a portion of the main topsoil <br />stockpile to the south, creating an additiona160,000 to 88,000 tons of coal storage azea. Run-of- <br />• mine coal is fed directly to these tubes. Bulldozers push the coal into the hoppers feeding the <br />underground reclaim system and into the crusher. The stacking tube facility consists of three <br />stacking tubes ranging in height from 91 to 94 feet and are constructed of reinforced concrete. <br />On top of each stack tube is a transfer structure. The transfer structures are approximately 38 <br />feet tall, open steel structures. The facility also includes a b0 foot tall feed conveyor drive tower <br />and a 42 foot high crusher building. Both of these are open steel structures. An as-built <br />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 />1943. The facility is used to separate over-sized material (typically consisting of rock) from the <br />product-sized coal. The screening facility consists of an open steel structure with a maximum <br />height of 84 feet and three associated conveyors. A 1,500 tons per hour high-angle conveyor <br />transfers material to the screening plant from the crusher, product-sized coal is transported to the <br />silo conveyor belt on a 1,500 tons per hour conveyor and a 300 tons per hour high-angle <br />conveyor transports over-sized material to the rotary breaker. An as-built construction <br />description is provided in Exhibit 68. <br />Storage Silos <br />Two silos provide temporary storage for product coal. These silos provide the storage capacity <br />. needed to accommodate MCC's production schedules and use of unit trains for shipping product <br />coal from West Elk Mine. The reinforced concrete silos provide about 24,000 tons of product <br />1.05-41 Revised November 1004 PRIG; Rev. March 1006; Rev. Apri11006PR10; Rev. May 1006PRI0 <br />