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Calumet and Hecla - Unwatering the Osceola Lode

Metal Trade, Copper Industry and Trade, Copper Mines and Mining, Geography, Maps, Various pictures of the unwatering of the Osceola Lode Project. [Plan Unwatering Osceola Lode No. 5 Tamarack Shaft Schematic arrg't of submersible discharge 8 column lines.]

Scanned: February 9, 2010