FILE - This Jan. 25, 2017 file photo shows Gallatin Fossil Plant in Gallatin, Tenn. State environmental regulators say it shouldn’t cost ratepayers more money or take as long as the nation’s largest public utility has estimated to complete a massive, court-ordered coal ash cleanup at the Tennessee power plant. State officials voiced skepticism over the Tennessee Valley Authority’s 24-year timeline and cost claims in federal court filings and state records. The utility has said it’s taking steps to comply with the court’s cleanup requirement, even as it appeals the order. (AP Photo/Mark Humphrey, File)
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