Mundowy Lane Upgrade Project

The southern section of Mundowy Lane will be upgraded preventing inundation during flows up to 45,000 ML/day at Wagga Wagga.

New culverts will be placed under the roadway, with minor raising over 2 sections of approximately 400 m in length. This will allow the passage of higher flows through the culverts, reducing the risk of damage to the road and mitigating impacts to adjacent properties.

Works to ensure access to properties during flows up to 45,000 ML/day will also be provided.

The project is fully funded by the Australian Government with practical completion scheduled for December 2026.

The department’s Water Group is leading the delivery of the project with the involvement of Wagga Wagga City Council.

All planning and approval activities for the project are now complete. This included developing an Aboriginal Cultural Heritage Assessment Report in partnership with Traditional Owners, undertaking ecological and environmental studies, completing site surveys and carrying out geotechnical investigations and hydraulic modelling to inform design.

The Water Group has finalised the detailed designs of all the culverts and awarded the construction contract to Fulton Hogan after a competitive tender process.

Site mobilisation is underway with construction expected to begin in mid-June. 

Once construction starts, local communities will experience changed traffic conditions. Single lane side tracks will be put in place around the culvert bays with portable traffic lights deployed to control traffic flow. Reduced speed limits will also be in place during the works for the safety of road users and the construction team.  

These changed traffic conditions may vary over time as the work progresses. 

Once construction and commissioning of the road upgrade is complete, Wagga Wagga City Council will continue as the asset owner.

Project timeline

The Water Group is committed to building and maintaining respectful, trusted and collaborative relationships with our communities and stakeholders to ensure water infrastructure projects achieve the best possible outcomes.

We have engaged extensively with surrounding landholders and Wagga Wagga City Council throughout the project’s assessment phase and their feedback helped inform the concept and final design of the road upgrade.  We also sought feedback from the community more widely at drop-in sessions held in Wagga Wagga and Gundagai in July 2025. 

In response to stakeholder feedback, the Water Group revised the initial design to incorporate 9 additional culverts in key flow areas, allowing additional flow capacity under the road and reducing the risk of blockage. The addition of these culverts brings the total number of new culverts being installed along the road to 24.

We will continue to work closely with affected landholders and other stakeholders to understand what needs to be done to deliver the road upgrade, while minimising local impacts, and will continue to keep local communities informed as the project progresses.

Business information 

The Water Group hosted a session in Wagga Wagga in August 2025 to provide businesses with information about upcoming tenders and the range of goods and services needed for the delivery of the Mundowy Lane upgrade, Mundarlo Bridge replacement and Werai Forest projects. Download a copy of the presentation and sign up for the Water Group’s water infrastructure business register via the links below.