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Tons Per Hour Coal Processing

May 29, 2020 During 2017, productivity ranged from 2.4 tons per miner-hour in Central and Southern Appalachia to 28.8 tons per miner-hour in the Powder River Basin (PRB). This wide range is a result of fundamental differences between the coal-producing regions, including the size of mines, coal seam geology, extraction technology, and coal types.