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Calumet and Hecla

Metal Trade, Copper Industry and Trade, Copper Mines and Mining, Disasters, Mine Accidents, Persons Final cave in at surface, showing upper part of last stope, all copper rock below having been removed. Calumet - Hecla Mines, Calumet, Mich. [Two barely visible men stand in opening of stope. Mining buildings in full operation stand above the crater.]

Scanned: December 15, 2009