Canterbury Town Centre – Water & Sewer Infrastructure
Canterbury, New South Wales, Australia
To support the development of City of Canterbury Bankstown, Diona undertook the design and construction (D&C) of a combination of both gravity and pressure mains, as well as amplification and upgrade of the SP0082 pump station. These upgrade works support the growth and improvement of the Canterbury area while reducing overflow events and facilitating Sydney Water’s ongoing improvements to the Cooks River.
Covering an area of 110km2 with a population or 360,000 in five wards, the City of Canterbury Bankstown was a newly formed suburb out of the NSW council amalgamations in 2016. With its closest ward being only 8km from Sydney CBD, the suburb was earmarked as a prime growth area; as part of the State Government’s metropolitan strategy, with over 1,200 apartments approved for the town centre in a bid to accelerate housing supply. Alongside housing developments, $18 million was allocated to improving the parks and the corridor along the Cooks River, including Close St Reserve and the area surrounding the pump station.
Diona was consulted due to the project’s anticipated complexity. To help meet the challenges of this highly technical project, Diona teamed up with Calibre, showcasing the benefits that can be achieved through collaboration.
Managing complexity through innovation and community engagement
A key challenge was to achieve the required deep excavations safely and efficiently, as conventional benching was not an option due to the location of the shafts in busy streets and near services and roadways. In an innovative move, Diona engaged specialist contractors to design and construct extension arms for the 48 T and 25 T excavators on site, which extended the excavators’ reach by 3-4m. This reduced the need to lift a smaller machine into the excavation, effectively removing high-risk lifts and operations, as well as removing the dangers of collapse. This solution not only reduced risk, it also allowed us to excavate the shafts more quickly and efficiently.
As much of the new works were inside the Cooks River bio-diversity corridor, environmental considerations were another major factor in the project. A heavy emphasis on sediment and erosion control ensured we met all expectations of local council, while consulting local bush care groups in the remediation process enabled us to additionally improve the area.
Throughout the project, Diona actively engaged with community stakeholders and local residents to ensure we left the site in a better condition than when the project started. As part of the restoration, Diona installed a drinking fountain on the edge of the cycle path near the pump station providing a place for walkers, runners and cyclists to stop and rehydrate while taking in the beautiful landscape of the river side. Diona also arranged a community planting day to restore the area adjacent to the pumping station which was well attended by the local community.
Not only does the upgraded sewer system and pump station ensure a superior performing system to support future growth, it also helps prevent sewer overflows for the long-term goal of improving the Cooks River.