Canadian company GreenLight Metals, doing business as Green Light Wisconsin, wants to conduct exploratory drilling at a 40-acre site owned by the U.S. Forest Service about 20 miles northwest of Medford in Taylor County. The deposit is believed to contain 4 million tons of mostly copper and gold.
Metals like gold and copper that occur in sulfide ore bodies have not been mined in Wisconsin since the Flambeau mine shut down in 1997. Concerns over pollution related to that mine led to the state’s sulfide mining moratorium that was repealed in 2017 under a law passed by the Republican-controlled state Legislature.
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