WCRSA Lagoon Closure


Western Carolina Regional Sewer Authority
Greenville, South Carolina


Greenville, South Carolina

As a result of modifications to treatment operations, a municipal wastewater treatment facility no longer required an aeration lagoon. The municipality desired to close the seven acre aeration lagoon in-place, using the remaining lagoon capacity for emergency storm water retention should the need arise. An investigation of the lagoon found that it contained sludge to an average depth of approximately seven feet. The designed cover consisted of a layer of biaxial geogrid placed on the sludge surface, followed by a two-foot thick layer of sand and a layer of CKD-treated sludge and topsoil.