Saginaw Mine, Isle Royale National Park, Lake Superior, Keweenaw Co., Michigan, USA

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Ref.: U.S.G.S. PP 144.

An underground mine located on Isle Royale. The Saginaw Mining Co. organized in 1875 and worked until 1879, when operations were suspended for good. The mine produced produced approx. 51,000 lbs. of refined copper. Collecting on what's left of the mine piles (if you can find it)is strictly prohibited.

Mineral List:

Copper

1 entry listed. 1 valid mineral.

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