FILE - In this Feb. 5, 2014 file photo, Amy Adams, North Carolina campaign coordinator with Appalachian Voices, shows her hand covered with wet coal ash from the Dan River swirling in the background as state and federal environmental officials continued their investigations of a spill of coal ash into the river in Danville, Va. A federal grand jury is convening Tuesday, March 18, 2014, as part of a widening criminal investigation triggered by the massive Duke Energy coal ash spill that coated 70 miles of the Dan River with toxic sludge. (AP Photo/Gerry Broome, File)
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