ST. PAUL, Minn. (AP) --The developers of a proposed copper-nickel mine near the Boundary Waters plan to use a potentially safer dry method of storing mine waste instead of the kind of wet tailings ...

Twin Metals, the company hoping to build an underground copper-nickel mine in the same watershed as the Boundary Water Canoe Area Wilderness, no longer plans to store its tailings behind a dam and ...

The Isle of Palms Planning Commission voted to recommend that city council not consider dry-stack storage in the redesign of the city marina. The commission made the decision unanimously at a special ...

The developers of a proposed copper-nickel mine near the Boundary Waters plan to use a potentially safer dry method of storing mine waste instead of the kind of wet tailings pond more common in the ...