In January, the tailings dam at a Brazilian iron ore mine collapsed, killing nearly 250 people. The wave of toxic waste and mud also wrecked two dozen buildings and polluted water for five miles.
In Minnesota, the disaster raised eyebrows among opponents of a copper-nickel mine planned near Hoyt Lakes. That’s because the design of the dam in Brumadinho was similar to one PolyMet Mining hopes to build. In fact, the Vale mining company had used a method to judge dam safety created by a PolyMet adviser.
And the tragedy in Brazil embodied the worst fears of some Minnesota environmental activists and the Fond du Lac Band of Lake Superior Chippewa, who warn PolyMet could pollute the St. Louis River. Continue Reading →