- Details
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Mine: Aetna Mine, Keweenaw County
Sunk→ Aetna Mine→ Closed
Operated for 10 years.
Opened: 1863
Closed: 1873 but an active corporation.
Lifetime Production: 7o tons of ingot copper.
Notes
Source: [CHBK]
Time Line
1863. Opened.
1873. Closed
1899. Reincorporated for 30 years. [CHBK]