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Arch currently operates a coal preparation plant at leer south. the leer south plant operates at a feed rate of approximately 1,600 raw tons per hour (tph). run of mine (rom) coal is sent from the slope to the raw coal #1 stacking tube. from that point, i

Summary: The Tunnel Ridge Mine is developed into the Pittsburgh #8 coal seam utilizing two dual shaft compartment air shafts along with an intake shaft and a bleeder fan. Tunnel Ridge operates one longwall section with three continuous miner sections. The