FILE - In this Feb. 10, 2016, file photo, the closed LTV Steel taconite plant is abandoned near Hoyt Lakes, Minn. An influential congresswoman wants to know why the Environmental Protection Agency opted against filing formal comments with state regulators when they were was considering whether to issue a key permit for the PolyMet copper-nickel mine in northeastern Minnesota. Minnesota Democrat Betty McCollum says it's "remarkable" that the EPA did not formally weigh in before the Minnesota Pollution Control Agency issued the final water permit for the project last month. (AP Photo/Jim Mone, File)
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