To connect Wyaralong Dam to the SEQ Water Grid and further improve water security for the growing Beaudesert and surrounding communities, Seqwater is currently planning for a new water treatment plant downstream of Wyaralong Dam on the Logan River at Riverbend.  

The Wyaralong Water Treatment Plant represents stage three of the Beaudesert Water Supply Upgrade (BWSU), which will provide long term water security for the growing Scenic Rim area.

Seqwater is progressing with important early enabling works to continue planning for the long-term water security project. Our team is conducting further site investigations, seeking important regulatory approvals, and investigating other infrastructure needed to connect the asset to the SEQ Water Grid.  

The Scenic Rim is experiencing a period of significant growth, with more than 67,000 people expected to call the community home by 2046. The area has also become a regional hub for large-scale freight and transport operations within the Bromelton State Development Area.

With rapid growth in areas like Beaudesert and South Logan, including Yarrabilba and Flagstone, the demand for water is increasing.

Currently, the Beaudesert Water Treatment Plant, which extracts water from the variable-quality Logan River and is not part of the South East Queensland Water Grid, supplies the area. Although the South West Pipeline project will enhance short-term water supply reliability, additional bulk water sources will be needed for long-term demand.

The proposed Wyaralong Water Treatment Plant will:

• Meet the growing demand for water in Beaudesert and the South Logan area, reducing the draw from the Southern Regional Water Pipeline.
• Draw on water supplied by the Wyaralong Dam, providing an additional source of water to the grid and increasing bulk water supply reliability in South East Queensland.
• Provide opportunities to support the local economy and create local employment during the construction and operation phase.

The Wyaralong Water Treatment Plant site is likely to be located on the north bank of the Logan River, approximately 500m upstream of the existing Cedar Grove Weir.

As part of the early enabling works, our team is conducting further site investigations, seeking important regulatory approvals, and investigating other infrastructure needed to connect the asset to the SEQ Water Grid. 

Our team has also commenced the procurement process as part of the early works. An industry briefing was held in February 2025 and provided an overview of the project, the delivery model, and the planned procurement process. Learn more about the procurement process and key dates here.

Pending final project approvals, Seqwater will be able provide more information regarding the project timeline, including construction activity.

We understand the community is interested in the project, and we will continue to provide updates as the project progresses.

There will be minimal impacts to the community or environment during the early enabling works. The early enabling works involve further site investigations and planning for the procurement process.

It is expected that neighbours to the water treatment plant and pipeline will experience some impacts when construction work commences, including short-term traffic disruptions, dust and noise. We understand the community is interested in any potential impacts, and we will continue to keep the community updated as the project progresses.

Seqwater installed a pilot water treatment plant in late 2023 on the southern side of the Logan River downstream of the Cedar Grove Weir. The pilot plant is testing different water treatment processes on the raw water drawn from the weir until 2026.

Cedar Grove Weir’s raw water has a unique mix of organics and other factors that require a specific treatment solution to be designed and tested, to deliver safe and reliable drinking water for the SEQ community.

Testing these treatment processes will help inform and optimise the design requirements for the Wyaralong Water Treatment Plant.