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Plan for modified longwall mining with a German coal planer (Plow) in the Pocahontas No. 3 coal bed, Keystone, West Virginia. Credit Bureau of Mines, U.S. Department of the Interior.

1. Modified Longwall Mining with a German Coal Planer (Plow) in the Pocahontas No. 3 Coalbed, Keystone, W. Va.

IDNO:
001785
Title:
Modified Longwall Mining with a German Coal Planer (Plow) in the Pocahontas No. 3 Coalbed, Keystone, W. Va.
Description:
Plan for modified longwall mining with a German coal planer (Plow) in the Pocahontas No. 3 coal bed, Keystone, West Virginia. Credit Bureau of Mines, U.S. Department of the Interior.