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Shaft sinking by stripping churn-drill holes

Examination, mapping, and sampling of mine shafts and underground workings, Leadville, Lake County, Colo.

Published Year

• 1940-1949 (2) *

Subject

• Mine shafts (2) *
• Mines and mineral resources--Colorado--Leadville Region (1)
• Mines and mineral resources--Colorado--Leadville region (1)
• Shaft sinking (1)

Author

• Cole, W. A. (1)
• Ebbley, Norman E. (1)

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