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Output per miner-hour rises as smaller coal mines close - US Energy ...

Sep 3, 2015 ... Coal mining productivity increased in 2013, averaging 5.5 short tons per miner hour, reversing a trend of declining productivity since at least...

Mining - PacifiCorp

PacifiCorp has interests in coal mines that support its coal-fueled generating facilities. In Wyoming, PacifiCorp has two-thirds interest in the Jim Bridger Mine.

Murray Energy Corporation | The Largest Coal Mining Company

Murray Energy Corporation is the largest coal mining company in America.

Coal Mining and Transportation - Energy Explained, Your Guide To ...

Coal miners use large machines to remove coal from the earth. Many U.S. coal deposits, called coal beds or seams, are near the earth''s surface, while others...

BNI Coal: Welcome to BNI

BNI Coal, LTD a subsidiary of BNI Energy, is developing North Dakota''s abundant lignite energy resource. At its Center Mine, BNI mines and reclaims about 200...