Construction gets underway on 108MW Waddi Wind Farm

Construction of the Waddi Wind Farm in Western Australia is scheduled to commence this year and will take about two years to complete. 

Decmil – a wholly owned subsidiary of Macmahon Holdings Limited – and its joint venture partner RJE Global have secured a $91 million contract from Tilt Renewables to undertake balance of plant works. The contract is on a split-basis with Decmil receiving $51 million and RJE Global receiving $40 million. 

The scope of the contract encompasses the design and construction of the balance of plant for the Waddi Wind Farm, including wind turbine bases, access tracks, site cabling and a switch room. 

“We are pleased to be partnering with RJE Global to deliver the Waddi Wind Farm for our valued client, Tilt Renewables. This award demonstrates Decmil’s strength in civil construction in the renewables sector, in line with our strategy to expand our Australian civil infrastructure business,” Macmahon Holdings Managing Director and CEO Michael Finnegan said. 

The 108MW wind farm is comprised of 18 wind turbines supplied by Vestas and approximately eight kilometres of 132kV double-circuit transmission line. 

Works will commence in early 2026, starting with site access works by Western Power. Major civil works such as the establishment of access tracks, installation of underground cables, and pouring of turbine foundations will also be carried out this year. 

Meanwhile, the wind turbines are expected to begin arriving in late 2026, which will be followed by tower assembly and installation. 

Commissioning is due to begin in early 2027 with a target commercial operation in 2028. 

“We now have everything in place to start construction, strong financial backing from our investors, a 15-year supply contract with AGL, an offer to connect to the SWIS, and planning approvals from local Shire of Dandaragan, State and Federal authorities. 

“This is a significant milestone for Tilt Renewables, as Waddi will be our first renewable energy project in Western Australia. 

“Our team have worked tirelessly to ensure the project minimises impact on local flora and fauna as well as on our neighbours. This is reflected in the changes we made to the project design and in our commitment to share benefits with our local community. 

“I would like to thank everyone who worked tirelessly to bring the project to reality as well as our contract partners, Western Power, Vestas, Decmil, RJE, AGL and many more. We look forward to a safe delivery of the project with our partners,” Tilt Renewables CEO Anthony Fowler said. 

Waddi Wind Farm is located about 15 kilometres north-west of the township of Dandaragan and 150 kilometres north of Perth. 

Once up and running, the wind farm will be able to generate enough energy to power around 68,000 West Australian homes annually. 

This renewable energy project is anticipated to create 150 new jobs during its construction and a further six permanent operational jobs. In addition, it will also provide more than $3.9 million in community benefit funding over the life of the project. 

Source: Macmahon Holdings Limited; Tilt Renewables (1, 2)