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{Vest Elk Mine • Table 30 Typical Equipment Used for Room and Pillar (Development) Mining at the West Elk Mine • Equipment Principal Use Continuous Miner Cutting Coal Diesel Shuttle Car Transport Coal To Feeder Feeder/Breaker Break Coal/Meter Flow To Belt Section Conveyor Belt Transport Coal To Main Belt Main Conveyor Belt Transport Coal To Surface Continuous Haulage Transport Coal To Section Conveyor Surge Car Same as Feeder/Breaker Roof Bolter Primary/Secondary Roof Support Power Center Provide Electrical Power Auxiliary Fan Provide Face Ventilation Water Truck/Wagon Dust Suppression-Roadways Rock Duster-Mobile Section & Outby Dusting Trickle Duster Return Entry/Beltline Dusting Bulk Dust System Minewide Rockdusting & Transport Mine Monitoring System Equip. Control, Monitoring & Safety Scoop/LHD Clean Up/ Equipment Moves Maintenance Tender Mining Equipment Maintenance Boom Truck Utility-Supply/Maintenance Mantrip Personnel Transport Grader Roadway Maintenance Fork Truck/Hydraulic Trailer Supply Transport Utility/Maintenance Vehicles Support/Transportation Other coal beds occur in the West Elk Mine area which are generally thin, discontinuous, and of poorer coal quality. The mining of these seams is not planned. These seams are, in ascending order, the A-Seam, the C-Seam, the D-Seam, and the F-Seam. The A-Seam is typically less than five feet in thickness and occurs too close below the B-Seam to be economically recoverable. Likewise, the C-Seam is typically thin, split with rock partings or absent in the West Elk Mine coal lease area. The C-Seam also lies sufficiently close to the; overlying B-Seam to allow recovery of both seams using longwall-mining methods. Likewise, the D-Seam occurs as a thin and impure coal bed in the West Elk Mine coal lease area and occurs too close below the E-Seam to be economically recoverable. Where the D-Seam merges with the overlying E-Seam, the upper portion of the D-Seam may be mined locally, with the E-Seam. Previous mining operations in the F-Seam have been unsuccessful. Because of seam thinning, poor roof conditions and coal quality, attempts to recover the F-Seam have • historically proven to be uneconomic. 2. ~5-6 8/93 Srip. J8 Revised Jan. / 99a PROS; 8/9J TR7l; Revisedhne. l 995 PR06;