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Japanese giant Sumitomo Corporation is expanding its Western Australian energy operations by planning to build the Marradong Wind Farm, south of Boddington in south-east WA.

Sumitomo subsidiary Quenda Wind Power (QWP) is targeting a plus-300 MW project for Marradong and is working with local developer Wind With Purpose to “conduct the full scope of activities to bring this opportunity to reality”.

A Final Investment Decision is anticipated in quarter 1 2027 for operations to start by the end of 2029.

QWP plans to develop and operate wind farms through the Southern Scarp of Western Australia, which aligns with Wind With Purpose’s development area of interest.

According to QWP this region has access to good wind resources situated close to large industrial loads in the south-west of WA. Worsley Alumina’s operations are in the vicinity.

QWP has engaged with land holders in the Southern Scarp region and is “completing the early stage wind monitoring campaign and environmental studies necessary to determine the location and sizing of various development options in the region”.

Quenda has taken its name from a small marsupial species endemic to the Southern Scarp region.

Sumitomo Corporation has a 49.99% investment in two existing conventional power stations in the South West Interconnected System, the Bluewaters Power Station and NewGen Power Station in Kwinana.

Another new wind farm planned for WA is ACE Power’s Walebing Wind Farm, to be located north-east of Perth in the Wheatbelt region.

Walebing Wind Farm is a proposed 500 MW project that will connect directly to the Moora Sub-station via a short overhead line so power can be exported into the Western Electricity Market.

ACE Power said it has “commenced preliminary development activities on the project and community information sessions will be held throughout 2025 to inform the local community about the project and collect feedback which will help shape the development of the proposed project”.

It’s expected to create around 300 jobs during construction.

The image shown is a snapshot of all proposed WA wind farm projects.