• Design and installation of temporary flow diversions
• Very deep excavation of soft and unstable soil
• Sheet piling

The site borders an environmentally sensitive beachfront nature reserve, on sandy soil among coastal dunes. This location increased the complexity of the works, with deep excavation and carefully designed and placed sheet piling required to position the base of the new UV structure low enough to provide a hydraulic profile for gravity flow through the system.

Works were carried out under brownfield conditions, with the construction area very close to existing, continuously operating process equipment and a large number of buried and above-ground service lines. Close coordination was required with Hunter Water Corporation’s on-site plant operations agents, Veolia, to ensure that there was no disruption to normal plant process operations. For some elements, this required design and installation of temporary flow diversions.

The Burwood Beach Wastewater Treatment Plant is designed to operate at a very high rate and treats 48 megalitres per day, handling the wastewater for a population of up to 220,000 people. Abergeldie delivered the project ensuring that the plant now complies with EPA environmental guidelines, forming part of our ongoing mission to reduce pollution.