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St. John Mine
The mine visitor center in 2016
Location 129 South Main Street
Potosi, Wisconsin 53820
NRHP reference No. 79000079
Added to NRHP June 4, 1979

The St. John Mine is located in Potosi, Wisconsin. It was added to the National Register of Historic Places in 1979.


Once a natural cave, Native Americans mined lead out of the site before Wisconsin's "lead rush" in 1827. The first non-Native American work the mine was Willis St. John. The mine is privately owned and tours are no longer available.

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