Safety and Skill Count When Closing a Coal Ash Impoundment
A Midwest utility needed to close a 140-acre wet fly ash impoundment − challenging work because of the difficult and unstable conditions involved. ENTACT’s experience and specialized construction skills helped to ensure a safe and successful closure for our utility client.
ENTACT conducted a phased dewatering approach, planning water flow, drainage and the regrading of the exposed fly ash according to site elevation. The regrading process was difficult, setting an elevation that would ultimately direct the subgrade for the construction of a new spillway. This spillway allows stormwater to flow from the closed site to a nearby creek.