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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 |