Western Harbour Tunnel, Sydney, NSW, Australia
Aurecon is transforming Sydney Harbour, replacing dredging with TBM tunnel engineering to deliver a faster, safer and more sustainable second harbour crossing.
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With work spread across metropolitan Adelaide and regional South Australia, the programme is delivering a diverse portfolio of projects, including dam upgrades, water tank refurbishments, bulk water transfer infrastructure, water main replacements, sewerage network upgrades and water and wastewater treatment upgrades.
It is one of the largest government contracts for project and program management services in the state.
Together with SA Water, Aurecon and KBR are providing program and project management, procurement support, engineering, sustaining capital and construction management services as part of an integrated team. This collaborative model is centred on sharing risk and responsibility for the success of projects in a true partnership and delivering critical infrastructure for communities.
Construction commenced in July 2020 on the AUD 1.6 billion, four-year programme to improve services for customers, with the first three projects involving water main upgrades across the Northern Adelaide Plains, and upgrades of the Glenelg Wastewater Treatment Plant and Myponga Water Treatment Plant:
SA Water is an internationally recognised water utility, a statutory corporation wholly owned by the Government of South Australia. It manages more than 27,000 kilometres of drinking water pipeline providing water and wastewater services to 1.7 million South Australians.
Reservoirs in South Australia are the state’s primary water storage areas, supplying homes, businesses and irrigation sources.
At full capacity, the collective network holds almost 200,000 megalitres of water – just under a year's supply for metropolitan Adelaide.
The partnership is providing technical governance and technical engineering review for dam upgrades that incorporate equipment, structures and access infrastructure. This includes supporting SA Water with conducting safety risk assessments, together with overseeing the design and construction of upgrades to maintain the performance and resilience of assets, and ensure structures comply with Australian National Committee on Large Dams (ANCOLD) guidelines.
The upgrades will ensure water supply security for South Australians and boost economic development opportunities for the agricultural and tourism sectors for future generations.
Major capital works are planned to be undertaken at Hindmarsh Valley. Other routine asset improvement and maintenance works are also being undertaken at Nettle Hill earth bank storage (liner replacement), South Para Dam (spillway chute remedial works), Hahndorf Dissipator (structural and erosion protection upgrade) and Gorge Weir (environmental flows outlet works upgrade).
A dam safety review and risk assessment found that upgrade works were required to address risks to the 14.5 metre-high, 221 metre-long earth fill embankment dam, as well as condition deficiencies in the labyrinth spillway and chute. The upgrade will strengthen these structures against earthquakes and improves capacity to safely pass large flood events, aligning it with updated safety guidelines set by ANCOLD.
For this project, Aurecon acted as part of SA Water’s Owner’s Engineer team for the safety review and risk assessment, scoping and reviewing the geotechnical investigation outcomes and reviewing the design of the upgrade works. Aurecon was also involved with reviewing the options report and collaborated with the independent expert review panel for the review of all deliverables.
The partnership’s sustaining capital approach to planning and managing the capital delivery programme will provide significant value for money for SA Water’s customers over the long-term. This is achieved by selecting, prioritising and planning the right projects to maximise the impact of available capital to sustain and transform assets.
Aurecon’s understanding of both the asset and business lifecycles; our water industry experience; and blend of advisory, digital and engineering expertise is enabling us to contribute integrated solutions and sustaining capital decisions to this partnership.
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