Photos: At PolyMet, ramping up to mine copper

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A rod mill inside the concentrator building
A rod mill inside the concentrator building Thursday, Oct. 10, 2013 at the PolyMet facility near Aurora, Minn. The rod mills are machines filled with rods of various size that are used to further crush rock during the extraction process.
Derek Montgomery / For MPR News

PolyMet Mining has been working for years to demonstrate its plan would avoid scenarios that infuriate environmentalists. The latest study on how an open pit copper-nickel mine could change the landscape just north of the town of Hoyt Lakes will be released Friday in a 1,800-page environmental impact statement. More: PolyMet copper-nickel mine: Economic opportunity or too environmentally risky?"

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