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What is PolyMet proposing?
PolyMet wants to mine copper, nickel and precious metals for 20 years at a site located just north of Hoyt Lakes in the Superior National Forest. The NorthMet Deposit is part of what is known as the Duluth Complex, which stretches from about 150 miles north of Duluth all the way to the Canadian border. PolyMet would build three open pits and blast and drill to get to the ore containing minerals. Ore would be put in rail cars and shipped seven miles west to an old iron ore processing plant — LTV Steel — which closed in 2001. PolyMet is repurposing the facility to process up to 32,000 tons of copper and nickel per day.
How significant are the deposits?
The Duluth Complex is considered one of the biggest copper-nickel deposits in the world. PolyMet’s mine would tap into just a small part of that, with the possibility of expanding later. PolyMet’s goal is to produce 72 million pounds of copper, 15 million pounds of nickel and 106,000 ounces of precious metals annually.
How does this proposal compare to other copper-nickel mines in the U.S.?