The Hanahan Water Treatment Plant currently provides clean drinking water for about 400,000 area residents in Charleston, NC. Donley’s Concrete Group is providing form-work labor and concrete placement to PC Construction (GC) and Charleston Water System (Owner) for construction of the Sedimentation Basins 9& 11 and the Settled Water Effluent Flume.

The project consists of 37,000 SF 2.5’ thick mat foundations, 10,500 SF of framed slabs and 2,400 LF of 20’ tall walls. The concrete and all materials must be placed in strict accordance with NSF 61 requirements governing the construction of drinking/potable water structures adding a level of technical complexity for the team. These new structures are part of a $42 million modernization project to the 100 year old Hanahan Water Treatment Plant which can treat over 100 million gallons of water per day serving customers throughout the greater Charleston area. Donley’s started the project in October 2018 and is projected to finish in March 2019.