Clonakilty Wastewater Treatment Plant Upgrade (Carberry-Muskerry Wastewater Treatment Plant)

Client: EPS Pumping and Treatment Systems
Services: Temporary works design, supply and installation of ground support system

The Carbery/Muskerry Wastewater Treatment Plants DBO (design, build and operate) and O&M (operate and maintain) Contract for €6million is primarily a contract to carry out upgrade works to the existing wastewater treatment plant in Clonakilty, providing a treatment capacity of 20,500PE (population equivalent).

Working for EPS, Trench Control designed and installed cantilever (unpropped) sheet piles for a 5m approximate retained height for the new Nereda tank. The primary difficulty on the project was the groundwater control given the tidal groundwater regime and underlying permeable gravels. Trench Control provided advice and proposed and installed a dewatering well layout which allowed the cofferdam to be dewatered effectively and allowing construction of the tank to a tight construction programme.