Greater Sydney Bridges

Greater Sydney Bridges

About the project

WaterNSW owns and maintains over 120 road bridge structures in the Greater Sydney area that provide access to and around WaterNSW major Dam and Water Supply assets. As supporting infrastructure, the upgrading of the road bridges will assist with the operations of our major assets to deliver high quality water to nearly 5.5 million people in the Greater Sydney region.

As part of the ongoing maintenance and safety upgrade program, 16 bridges will be upgraded in the Stage 1 Program commencing April 2019. Upgrades to the bridges will ensure that current Work Health and Safety (WHS) Standards and Heritage requirements are being met.

During the Stage 1 Program, various bridges along the Upper Canal, Prospect Reservoir, Woronora Dam, Cordeaux Dam, Avon Dam, Warragamba Dam and Wingecarribee Reservoir will be upgraded. Planning for future upgrade Programs to the remaining bridges will continue and will be scheduled in future Stages.

Select Civil/Cardno will be undertaking the current Stage 1 Program for the road bridge upgrades on behalf of WaterNSW. Project completion is scheduled for August 2021.


  • Improve safety standards to major structures and access to WaterNSW assets
  • Preserve the heritage significant structures and surroundings
  • This project will create approximately 50 jobs and deliver benefits to the local communities

During the upgrade

Road bridges provide access to WaterNSW major assets. WaterNSW staff and contractors access these bridges regularly for operations and maintenance purposes. Some road bridges are publicly accessible providing access to private property or recreational areas at the dam sites.

During the works there may be increased traffic movements, localised noise and dust impacts.

Road bridges will need to be closed during various stages of the project when construction activities are considered to increase risk to safety. Every effort will be made to provide notice to affected stakeholders and where possible an alternate access route will be identified. Signage and traffic management will be in-place prior to any works starting.

Current closures to road bridges and dam sites

  • Upper Canal Bridge between Twenty Seventh and Twenty Eighth Avenue, West Hoxton will be closed from 17 June to mid July 2020. Detours are in place.
  • Bridge over the Nepean River and the Avon Dam picnic area will remain closed until the end of July 2021.

Project schedule

  • February 2019 – Project award
  • April 2019 – Construction to start on the bridge over Wingecarribee Reservoir, Shoalhaven area
  • January 2020 – Construction to start on the Upper Canal Bridges
  • June 2020 – Construction continued to the bridge at West Hoxton, Austral
  • July 2020 – Construction to start on the bridge over the Nepean River at Avon Dam
  • April 2021 - Construction to start on the Prospect Spillway bridge
  • August 2021 – Project due for completion

Contact details

For more information about the upgrades or to enquire about any of the project activities contact us or call 1300 662 077.

Project Manager: Khanittha Poonbua


Thursday 02 December
2,494,850 ML
2,581,850 ML
9,154 ML
1,308 ML
30,186 ML
Thursday 02 December