PolyMet mine critics charge environmental review underestimates water contamination problem

  • Article by: STEVE KARNOWSKI , Associated Press
  • Updated: January 23, 2014 - 6:55 PM

MINNEAPOLIS — Opponents of the proposed PolyMet copper-nickel mine in northeastern Minnesota charged Thursday new data show that the state's new draft environmental review for the project underestimates how much contaminated water could flow from the mine, raising serious questions about the long-term costs of treating it.

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