Minnesota Public Radio

Minnesota regulators said Friday they plan to conduct their own independent environmental review of the proposed Twin Metals Minnesota copper-nickel mine, rather than collaborating on a joint review with federal regulators.

Twin Metals has yet to file its mine plan of operations — which will detail the specifics of the operation, from its physical footprint to how it will handle waste material. That will kick-start the environmental review process. The project has already come under fire for its close proximity to the pristine Boundary Waters Canoe Area Wilderness....