Duke Energy signs agreement with U.S. Fish and Wildlife Service Duke Energy announced it has signed an agreement with the U.S. Fish and Wildlife Service, the North Carolina Department of Environment and Natural Resources, and the Virginia Department of Environmental Quality regarding any natural resources impacts caused by the coal ash release into the Dan River that occurred at the company's retired Dan River coal-fired power plant in Eden, N.C., on Feb. 2. Duke Energy issued the following company statement regarding the agreement: "This agreement represents a significant milestone in Duke Energy's ongoing efforts to restore and monitor the Dan River and surrounding environment. Duke Energy is fully committed to the river's long-term health and well-being. River water quality has returned to normal and drinking water has remained safe."