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Twin Metals to use environmentally friendly stack tailings at planned copper-nickel mine

CBS 3 Duluth
Krystal Frasier

Twin Metals has announced the company will be using an environmentally friendly dry stack method to store leftover rock from the proposed underground copper-nickel mine near Ely.

According to the company, the dry stack method eliminates a storage pond and dam, which are often associated with conventional tailings facilities, and have been used in four mines in the northern United States and Canada.


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