Macquarie River Re-regulating storage

Macquarie River Re-regulating storage

March 2020 Stakeholder Forums Postponed

Unfortunately due to the outbreak of COVID-19, and the resulting government requirements to slow the spread of the virus, WaterNSW has made the decision to postpone the upcoming stakeholder forums scheduled for the 26 and 27 March 2020.

We are committed to ongoing and transparent consultation for this project. However, we need to ensure that the information can be distributed safely and through technology which is both easily accessible and reliable.

We are currently investigating alternative methods to carry out these sessions that will remove the need for face-to-face interaction, take into account the collective safety of the communities in the Macquarie Valley, and meet current government requirements.

We will be in contact with stakeholders who are directly impacted by this postponement to advise of our next steps.

About the project

WaterNSW has been engaged by the Department of Planning Industry and Environment to prepare a Detailed Business Case to explore the option of constructing a re-regulating weir on the Macquarie River. This follows recommendations by Infrastructure NSW in the 2014 State Infrastructure Strategy (PDF) and WaterNSW’s 20 Year Infrastructure Options Study.

Earlier studies and consultation focused on location options for the re-regulating weir between Warren and Narromine, with specific sites being investigated near Gin Gin Weir and Rocky Point. Following the options investigation and consultation, the preferred site has been identified and will be located downstream of the existing Gin Gin Weir. The site was selected following detailed assessment against the strategic priorities of the regional water strategy, as well as environmental, social, economic and construction impacts.

The preferred site will undergo further assessment with an Environmental Impact Statement involving technical, hydrological, environmental, biodiversity, cultural and economic feasibility studies, and further stakeholder consultation.

The development of the Detailed Business Case will involve stakeholder consultation, as well as comprehensive environmental and engineering studies. These studies began in early 2019 and will continue to mid 2020.  Outcomes of these studies will be included in the Detailed Business Case and be submitted to Infrastructure NSW as part of the Infrastructure Investor Assurance Framework gateway process.

WaterNSW has engaged GHD, an environmental and engineering consultancy, as a delivery partner for the project.

The project will be developed to align with the Macquarie Regional Water Strategy which is currently under development. The Macquarie Regional Water Strategy will identify policy, planning and infrastructure options that deliver resilient water resources for all water users in the Macquarie Valley.

This project and the Macquarie Regional Water Strategy are both supported through funding from the Snowy Hydro Legacy Fund.


  • Achieving long-term water security strategic objectives in the Macquarie Valley
  • Improved delivery efficiency to customers downstream of Gin Gin
  • Reduced transmission losses when transferring and delivering water through the river system on an annual basis; and
  • Maximise available water for general security customers within the sustainable diversion limits set under the Murray-Darling Basin Plan.

Project Schedule

  • March 2019 – Project planning and investigations commenced
  • July 2019 – Consultation with stakeholders and potentially affected landholders commenced and will be ongoing
  • September 2019 – Field studies and detailed investigations commenced
  • Late December 2019 - Concept design completed
  • Mid 2020 – Detailed Business Case submitted
  • Late 2020 - Environment Impact Statement on public exhibition

Project Information

Contact details

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

Project Manager: Andrew Lavelle

NSW Government

This project is supported by the Department of Planning Industry and Environment.


Saturday 28 March
2,150,514 ML
2,596,150 ML
8,814 ML
1,260 ML
7,499 ML
Saturday 28 March