Twin Metals to use environmentally friendly stack tailings at planned copper-nickel mine
CBS 3 Duluth
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.
To view the full-text version of this article and video from CBS 3, visit