Aerial view of Duke Energy workers using a portable pump to empty wastewater from a coal ash pit at its Cape Fear plant in Chatham County, N.C. into a canal that leads to a tributary of the Cape Fear River. The plant's Clean Water Act permit authorizes discharges only when the wastewater level overtops the vertical discharge pipe visible in the photo, in order to reduce discharges of toxic solids. (Photo by Rick Dove, Waterkeeper Alliance.)