HOYT LAKES, Minn. — Of the bad things that could happen once PolyMet starts running Minnesota’s first-ever copper mine, critics say, among the worst would be a catastrophic breach of the tailings ...
HOYT LAKES - Of the bad things that could happen once PolyMet starts running Minnesota's first-ever copper mine, critics say, among the worst would be a catastrophic breach of the tailings basin dam.
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