COLUMBIA - Duke Energy officials are assuring South Carolina regulators that neither of the utilities' coal ash ponds in the state have designs similar to a pond in North Carolina which dumped millions of gallons of contaminated water into a river.

George Everett told the Public Service Commission on Monday that storm water pipes do not run under its full coal ash pond in Anderson County or its dry pond in Darlington County. A break in a storm water pipe caused the massive leak into the Dan River near Eden, N.C.

But Southern Environmental Law Center attorney Frank Holleman says there are plenty of other things that can happen to the primitive ponds. He says the Anderson County pond has a storm water pipe at the base of its dam.