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Reference.org
Blackbird mine
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<p>Blackbird mine was a large <a href="/facts/Cobalt/gqhScEw4">cobalt mine</a> in <a href="/facts/Lemhi_County/Cjg1M97P">Lemhi County</a>, <a href="/facts/Idaho/68ELs9Um">Idaho</a>, United States. </p><p>Mining for gold started in 1893, and the mine produced copper and cobalt between 1902 and 1968. The deposit still holds considerable amounts of copper and cobalt. </p><p>Water contamination at the mine resulted it its listing as a <a href="/facts/Superfund/FFJJqmmu">superfund site</a> in 1983, and lawsuits ensued between the state of Idaho and the mining companies to clean it up. After over a decade in the courts, some cleanup began in 1997, which is indefinitely ongoing. </p>