• Wyaralong Water Treatment Plant is one step closer after Seqwater selects two major contractors and operators to progress to the next procurement stage. 

• The new Water Treatment Plant and adjacent infrastructure will connect Wyaralong Dam to the SEQ Water Grid and bolster water security for Beaudesert and surrounding communities. 

• The project forms part of Seqwater’s long-term response to population growth, future demand for drinking water and climate variability. 

• Seqwater is investing more than $60 million in early works as part of the project. 

The two shortlisted Joint Ventures are: 

• Acciona Wyaralong, comprising Acciona Construction Australia Pty Ltd and Acciona Agua Australia Pty Ltd and 

• SJHJV, comprising John Holland Queensland Pty Ltd, Sacyr Water Pty Ltd, and Sacyr Construction Australia Pty Ltd 

The two shortlisted joint ventures will now enter a six-month Early Contractor Involvement (ECI) phase with Seqwater to refine and develop comprehensive design, construction and delivery solutions.  

Final proposals are expected in 2026, with a preferred proponent to be awarded the contract subject to government approvals. 

Seqwater is investing more than $60 million in early and enabling worksfor this critical water security infrastructure project.  

Once complete, the Wyaralong Water Treatment Plant project will connect Wyaralong Dam to the SEQ Water Grid, helping to secure drinking water supplies for one of South East Queensland’s fastest growing regions. 

The Wyaralong WTP will treat raw water from Wyaralong Dam via the Logan River, supplying up to around 48 Olympic sized swimming pools of treated drinking water per day to Beaudesert and surrounding communities.  

At the height of construction activity, the project could support up to 1,500 direct and indirect jobs.  

The project is on track to deliver first water in 2032. 

Quotes attributable to Seqwater CEO, Emma Thomas: 

Seqwater’s Wyaralong Water Treatment Plant project is a major investment in South East Queensland’s future.   

Shortlisting two very experienced consortia Acciona Wyaralong and SJHJV marks an important milestone in progressing our plans to continue delivering a safe and reliable supply of drinking water to the community for generations to come.  

Pending project approvals, the Wyaralong Water Treatment Plant could deliver enough drinking water each day to the SEQ Water Grid for up to around 800,000 people or more than 210,000 typical households.  

The project will be the largest traditional water treatment plant that Seqwater has constructed in more than 15 years.  

More information:  

Wyaralong Dam was built in response to the Millennium Drought and completed in 2011. Just 25 days after construction finished, the region received heavy rain and Wyaralong Dam began to fill. 

Connecting Wyaralong Dam to the SEQ Water Grid forms part of Seqwater’s Beaudesert Water Supply Upgrade, including the 27-kilomotre South West Pipeline, Wyaralong Water Transfer Station, and two storage reservoirs near the Beaudesert WTP.  

For more information on the project and the Beaudesert Water Supply Upgrade, visit the Seqwater website, email [email protected] or call 07 3432 7000 (during business hours).