Early work is underway to design a replacement for the Mildura Weir — an essential piece of infrastructure that has supported water delivery, navigation and recreation in the region for nearly a century.
As part of the project’s first phase Goulburn-Murray Water (GMW) has engaged engineering consultants GHD to conduct a comprehensive options analysis for the replacement structure.
GMW General Manager Strategy and Service Planning Steven Abbott said the century-old weir had served the community well, but it was time to evaluate options for a new structure that would ensure the long-term viability of the asset.
“The first stage of the project involves GHD conducting an initial design options assessment,” Mr Abbott said.
“Through the design process we’re seeking options that enhance operational safety, increase fish passage, reduce maintenance costs, and support environmental and economic outcomes.
“We acknowledge the historical and community significance of the Mildura Weir and will keep the community and key stakeholders informed of the project’s progress, ensuring their concerns and suggestions are considered as designs mature.”
GMW operates and manages the Mildura Weir on behalf of the Murray–Darling Basin Authority (MDBA).
MDBA Executive Director of River Management Jacqui Hickey, said sustained investment in infrastructure across the Murray–Darling Basin was essential to ensure ongoing safety and the efficient management of water resources.
“Roughly 30 dams, locks and weirs operate across the River Murray System that allow us to store, release and manage water to meet the many needs of irrigators, communities and the environment,” Ms Hickey said.
“These river assets are constantly tested and support our operations through a range of conditions, from very dry and low flows, through to extreme wet and floods – it's essential we plan for and fund the maintenance and replacement of these appropriately.
“With their experience in large-scale infrastructure projects, GMW is well placed to lead the options design and develop the business case to replace the weir on behalf of Basin governments.”
The MDBA and GMW emphasised that the planning and approvals process will take several years, and that the community will be kept informed about the project and the opportunities to get involved.
Mildura Weir provides essential services, including water access and security for communities and businesses both up and down stream.
Members of the public are encouraged to sign up to Home | Your Say @ GMW to receive project updates, register for consultation opportunities, and provide input into the design process.
Background
The Mildura Weir, constructed between 1923 and 1927, has been essential for irrigation, navigation, and flood control.
It is the only Dethridge-type weir remaining in Australia, and the structure's 24 trestles, each weighing 11 tonnes, can only be removed for maintenance and floodwater passage manually, a process known as a "weir pull."
GMW, Australia’s largest rural water corporation, is leading the project in collaboration with the MDBA.
Project phases:
Phase 1: Preliminary economic and design options assessment.
Phase 2: Statutory approvals and detailed design.
Phase 3: Construction and completion.