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Basic estimated capital investment and operating costs for underground bituminous coal mines :mines with annual production of 1.06 to 4.99 million tons from a 72-inch coalbed

Basic estimated capital investment and operating costs for underground bituminous coal mines :mines with annual production of 1.03 to 3.09 million tons from a 48-inch coalbed : revision of Information circular 8641

Basic estimated capital investment and operating costs for underground bituminous coal mines :mines with annual production of 1.06 to 4.99 million tons from a 72-inch coalbed

Published Year

• 1970-1979 (3)

Subject

• Bituminous coal--Costs (3)
• Coal mines and mining--United States--Cost of operation (3) *

Author

• Hemingway, E. L., (3)
• Katell, Sidney. (3) *
• Berkshire, L. H., (2)

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