The US Environmental Protection Agency (EPA) has dealt a fresh blow to PolyMet Mining’s (TSX: POM) plans to build an open pit copper-nickel mine in Minnesota, by recommending the US Army Corps of Engineers not re-issue a key water-related permit.
The agency said this week the $1 billion NorthMet project, the first large-scale project to be permitted within the Duluth Complex in northeastern Minnesota, risked increasing levels of mercury and other pollutants in the St. Louis River downstream from the proposed mine.