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Warragamba Dam Raise Detailed Concept Design

Raising one of the world’s largest domestic supply dams

  • 14M

    Height Raise

  • 75KM2

    Reservoir Size

  • 5M

    People Supplied

  • Sydney, New South Wales

    Sydney, New South Wales

Improving flood resilience on Sydney’s largest reservoir

Completed in 1960, Warragamba Dam is one of the largest domestic water supply dams in the world and accounts for about 80% of Sydney’s water—supplying more than five million people. The goal of a dam raise? To create a flood mitigation zone to reduce the risk to life, property, and community assets.

The Warragamba Dam is a concrete gravity dam, 142 metres high (465 feet) by 351 metres (1,151 feet) long, with a central gated spillway section about 90 metres (295 feet) wide. We explored options for raising the dam by up to 14 metres (46 feet) and investigated alternatives such as building a new dam to replace the existing one. After considering all the possibilities, we developed the best design option and a detailed concept design which would support the government business case. Combining local and global water infrastructure and engineering expertise, our team provided services including design, project management, 3D finite element modelling, construction sequencing, and flood mitigation concepts.

The Warragamba dam raise concept was completed in 2020. Now? We’re continuing to support Water NSW and now Water Infrastructure NSW as they advance to the project implementation stage. When completed, this dam raise will reduce the risk of floodwaters in the Hawkesbury-Nepean Valley.

At a Glance

  • WaterNSW
  • GHD
Meet Our Team

Greg Brown, Major Projects Manager, Water

I thrive on the enormity and challenge of moving major infrastructure projects in renewable energy and flood mitigation forward.

Patrick Hartel , Vice President, Power & Dams

My career-long focus has been to provide sound, cost-effective solutions that start with a smart design process and allow our clients to be successful.
Patrick Hartel Vice President, Power & Dams Read More

Greg Brown

Major Projects Manager, Water

Patrick Hartel

Vice President, Power & Dams

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Build Date: 2022-44-13 12:44:33