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Dam projects

Wyangala Dam wall raising

The proposed Wyangala Dam Wall Raising Project will provide communities in the Lachlan Valley region with improved water security, increased drought resilience and better flood mitigation.

Wyangala dam
What's happening

  • Work is continuing on the Final Business Case.
  • Meanwhile construction work on the new Wyangala Water Treatment Plant is well underway and is due to be finished in the first half of 2023.
  • In the weeks leading up to the NSW election there are special arrangements in place to ensure the neutrality of the public service. From January 26 until March 25 2023, our primary source of communications will be via our website. Our regular electronic newsletters will cease during this period. For any enquiries, contact us by email: wyangaladamproject@dpie.nsw.gov.au or call 1800 735 822 during business hours.


The NSW Government remains committed to completing the Final Business Case to raise Wyangala Dam wall by 10 metres to improve water security, drought resilience and flood mitigation for the Lachlan Valley.

Raising the dam will significantly increase storage capacity by an extra 650 gigalitres, or 53 per cent.

A robust Final Business Case is a vital step in enabling the NSW Government to make an informed investment decision about major infrastructure projects.

Over the past two years, a range of geo-technical, hydrological and environmental investigations have been carried out as part of the business case process.

The Final Business Case is on track to be submitted to the NSW Government for its review in the first half of 2023

Work on a new $5.1 million Wyangala Water Treatment Plant began in February and is due to be completed in the first half of 2023. It will deliver up to 800,000 litres of clean drinking water every day to the village residents and the popular holiday park.


  • 2023 Final Business Case will be submitted in the first half of 2023
  • 2023 Wyangala Water Treatment Plant will be completed in the first half of 2023
Important information

Note that project timelines can be affected by a range of factors including weather conditions, increased time to carry out consultation and instances where technical analysis and assessments require further work or investigation. Water Infrastructure NSW places the highest priority on the safety and wellbeing of its staff and the communities we work with. We are closely adhering to the current COVID-19 Public Health Orders which may have an impact on project activities and timelines. This website will be regularly updated to reflect this and to keep communities notified of changes.

Key benefits of the project include:

The Wyangala Dam Wall Raising Project will:

  • Increase dam storage capacity by 53 per cent or an extra 650 gigalitres
  • Deliver approx. 21 gigalitres per annum additional estimated yield for general security license use
  • Provide a significant improvement in:
    • water security
    • drought resilience
    • flood mitigation for the Lachlan Valley
  • generate new local business and employment opportunities and attract new investment to the region.

The Wyangala Dam Wall Raising Project is expected to:

  • improve productivity for primary industries
  • provide greater water reliability to support additional investment by businesses, particularly in the agricultural sector, including:
    • transitioning to higher yield agricultural products
    • increasing stock levels.
  • secure the region’s town water supplies, stimulating the growth of the regional economy and supporting population growth.

Early works package: new water treatment plant at Wyangala

As part of an early works package for the proposed Wyangala Dam Wall Raising Project, a new water treatment plant is currently being built to deliver cleaner, safer drinking water for village residents and the popular holiday park.

The $5.1 million plant is due to be completed in the first half of 2023 and will deliver up to 800,000 litres of clean drinking water every day.

Project updates

Check out the latest updates about the Wyangala Dam Wall Raising Project.

Webinar recordings

The project team host regular webinars to keep the community up to date on the project. You can watch webinar recordings via the links below.


These webinars are for community members who are interested in knowing more and keeping up to date with the progress of the project.

Local businesses

These webinars are for local businesses who are interested in knowing more about opportunities for suppliers on the project.

Wyangala dam wall raising project

Planning and delivery

For detailed project planning information please visit the NSW Government Planning portal.

View the Environmental Assessment Requirements (PDF, 232 KB)

Guiding principles

Water Infrastructure NSW is committed to these guiding principles in the planning, development, and construction of this project:

  • maximising benefits and opportunities for local people, businesses and communities
  • using local contractors and services
  • engaging early, particularly on environmental and cultural impacts
  • working directly and personally with upstream landholders who may be impacted by inundation from the rise in water level
  • maximising customer benefits
  • modelling and explaining future flood frequency scenarios
  • having a local point of contact for community groups, stakeholders and landholders.

Water Infrastructure NSW will work closely with the community to address the issues and opportunities that arise throughout the project.

Local business register

Water Infrastructure NSW is encouraging local businesses to register as a supplier for the Wyangala Dam Wall Raising project. The local business register will be provided to the major construction contractors so they can demonstrate how they will maximise local business and employment opportunities as part of the tender process.

For this project, local business is defined as 150km from the project area, including Condobolin.

Please note, registering your interest does not guarantee employment.

Register your business

Contact us

To speak with the project team, phone 1800 735 822 or email wyangaladamproject@dpie.nsw.gov.au

Sign up To receive project updates via email, sign up.

Facebook logo Facebook users can also join the Water Infrastructure NSW Wyangala Dam Wall Raising project Facebook page.

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