Santee Cooper Utility — Moncks Corner, SC

The Challenge

Problem

Santee Cooper's Cross Generating Station needed to bring its coal combustion residual ash ponds into compliance with the EPA CCR Rule. The existing unlined ash ponds required either closure or retrofit with engineered liner systems. The utility chose to construct a new lined ash management area while closing the legacy ponds, requiring a containment system engineered for the alkaline chemistry and heavy metal content of coal ash leachate.