Federal prosecutors in North Carolina have issued a new subpoena in their ongoing criminal investigation into the massive coal ash spill at a Duke Energy power plant.
The grand jury subpoena sent to the North Carolina Utilities Commission on Friday directs the agency's staff to provide additional records involving the two coal ash dumps at Duke's Dan River Steam Station.
A pipe running under one of the dumps collapsed Feb. 2, triggering a spill that coated 70 miles of the Dan River with toxic sludge. The subpoena orders the state commission to produce the documents Tuesday.
Grand jury proceedings are secret. The new request indicates the federal investigation is still ongoing since a flurry of more than 20 subpoenas issued to Duke and state regulators shortly after the spill.
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