Minnesota’s Permit For Northshore Mine Expansion Riles Tribes, Environmental Groups

Tribal and environmental groups say the state’s plan to allow expansion of a taconite mine raises the same concerns as the prospect of copper-nickel mining in northeastern Minnesota. in comments submitted to the MPCA, environmental officials at the Fond du Lac and Grand Portage bands pointed out that the permit does not set specific limits for sulfate, mercury, copper, nickel, zinc, or cobalt in water leaving the mine site — metals that often leach from sulfur-bearing rock when it is exposed to water. Instead, the permit requires the company to monitor the water it discharges into the environment.

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