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 ...

… but our independent journalism isn’t free to produce. Help us keep it this way with a tax-deductible donation today. The safety of storing mining waste in a tailings basin has been a critical part ...

Architects and front end designers usually leave the back end to the physical designers: they know there can be different numbers of metal layers, but may not realize the characteristics of each metal ...