Groups say Canadian-owned copper-nickel mine is threat to water flowing into Lake Superior watershed
Human rights and environmental groups protested at the PolyMet annual general meeting Wednesday over a proposed copper-nickel mine recently approved in Minnesota, about 50 kilometres from the Canadian border.
Ottawa-based PolyMet has recently obtained final state permits to move ahead with construction of the NorthMet mining complex, which would have three new open pits, waste rock heaps, and a permanent tailings waste dump on a site in the St. Louis River watershed which drains into Lake Superior.
The activists are concerned over the risk of tailings spills which could harm a sensitive watershed, kill fish and affect Indigenous wild rice beds. Representatives from Amnesty International Canada are framing it as a rights issue, pointing to the Mount Polley mine disaster in B.C. when a dam failure sent toxic tailings into a watershed used by Indigenous people.