Duke Energy illegally pumped 61 million gallons of contaminated water from a coal ash pit into the Cape Fear River, marking the eighth time in less than a month the company received citations for environmental violations, North Carolina regulators said.
The pumping violated the terms of Duke’s wastewater permit at its Cape Fear Plant, State Department of Environment and Natural Resources (DENR) spokesman Jamie Kritzer said Thursday. Kritzer said the agency issued Duke a formal notice of violation, which could result in hefty fines.
Regulators from the agency said the illegal pumping had been going on for months. It wasn’t immediately clear if Duke’s efforts to empty the pond ended up related to a crack in the earthen dam holding back the coal ash. Duke first disclosed the existence of the crack to regulators on Thursday.
Inspectors are trying to determine the cause of the crack, but the dike does not appear to be in imminent danger of collapse, said State Dam Safety Engineer Steve McEvoy.
Duke was not immediately available for comment.
A Feb. 2 pipe collapse at a similar Duke coal ash dump in Eden coated 70 miles of the Dan River with toxic sludge. Duke has nearly three dozen other ash pits spread out at 14 coal-fired power plants across the state.
The state is now testing water samples from the Cape Fear River for signs of hazardous chemicals. Coal ash contains arsenic, lead, mercury and other heavy metals highly toxic to humans and wildlife.
Several sizable cities and towns are downstream of the Duke plant, including Sanford, Dunn, Fayetteville and Wilmington. Kritzer said municipal officials in those communities have not reported problems with drinking water.
Duke’s dumping first came to light March 10 by the environmental group Waterkeeper Alliance, which took aerial photos of two large mobile pumps at the facility. The pumps appeared to be draining water directly from a large coal ash dump into nearby woods and into a canal leading to the river.
State regulators went to the site the following day for what Kritzer said was a previously scheduled visit as part of planned inspections of all of Duke’s coal ash dumps in the wake of the Dan River spill.
As is customary, Duke had advance notice of the inspection.
“This ensures that our inspectors can speak to the appropriate people when we arrive” and view the appropriate records, he said.
When the inspectors arrived, Duke had disabled the pumps the environmental group had photographed the prior day, Kritzer said.
Duke had notified state regulators by phone in August that the company was going to be performing “routine maintenance” that included using a temporary pumping system to lower water levels.
Though regulators had visited in the intervening months, there were no issues until March 11. State Water Quality Director Tom Reeder said his staff discovered the illegal pumping before the Waterkeeper Alliance released its photos.
“The state’s investigation revealed that the pumping activities ongoing at this plant far exceeded what would reasonably be considered routine maintenance,” Reeder said.
This is the eighth notice of violation the state has issued against Duke in less than a month.
The first two, issued Feb. 28, related to the Dan River spill. On March 3, regulators cited five Duke plants for lacking stormwater permits required to legally discharge rainwater draining from its property into a river or lake.
A federal grand jury convened this week in Raleigh as part of a widening criminal investigation triggered by the Feb. 2 ash spill. Prosecutors have issued at least 23 grand jury subpoenas to Duke executives and state officials.