Iron Range mine could pollute water for up to 500 years

The mine would require what critics say is essentially perpetual water treatment — a first in Minnesota’s long history of mining — to remove pollutants and heavy metals that would otherwise flow into nearby streams and rivers and eventually Lake Superior, according to a draft environmental impact statement.

The analysis, which regulators expect to release for public review in November, was prepared as part of the state’s review of a mining complex proposed by PolyMet Mining Corp., at a site near Hoyt Lakes.

http://www.startribune.com/local/226548091.html