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Three men hand-drilling at a mining competition

Peterson, Carl M.
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Date
1972?
Date Issued
Date Submitted
Keywords
Mining competitions
 Views -- Interior
 Miners
 Boring -- Competitions
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Colorado Mining Association Collection
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A0160-087.jpg
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URI
https://hdl.handle.net/11124/173385
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Abstract
Two men with sledgehammers and a third man positioning a bit compete in double-jack drilling on a stage at a mining competition, Western Mining Conference & Exhibition.
Caption reads: "Doublejack drilling."
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Copyright retained by Colorado Mining Association.
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