Illawarra Wastewater Strategy
Wollongong, New South Wales, Australia
Client: Sydney Water
Parsons Brinckerhoff Role: Design
The Illawarra Wastewater Strategy transformed wastewater treatment in the Illawarra, a coastal region of New South Wales, south of Sydney. The project was a key element of Sydney Water’s long-term strategy for sustainable water management, including cleaning up waterways and improving water quality at beaches. The AU$200 million project produced dramatic improvements in wastewater treatment and water reclamation.
The project included upgrading and expanding the Wollongong wastewater treatment plant and converting two existing sewage treatment plants to storm water storage and overflow treatment. Other elements of the project included pumping stations, a 3,300-foot-long (1,000-meter-long) ocean outfall, and a water reclamation plant that provides high-quality recycled water for industrial use. It is one of the largest such plants in Australia.
The project was delivered by a joint venture of Walter Construction and Vivendi Water (now Veolia Water). As principal design consultant to the joint venture, Parsons Brinckerhoff was responsible for designing the outfall, pipelines and pumping stations. The project included many technical challenges, including a 6,200-foot-long (1,900-meter-long) horizontal directional drill for a pipeline under Wollongong—at the time the longest such drive in the southern hemisphere.