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Proposed Wyaralong Water Treatment Plant

To support a safe, reliable and resilient water supply for South East Queensland into the future, Seqwater is currently planning for a new water treatment plant to connect Wyaralong Dam to the SEQ Water Grid.

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Home What We're Doing Proposed Wyaralong Water Treatment Plant

South East Queensland’s (SEQ) population is set to grow, putting greater demand on existing water supply assets. 

Under current levels of demand, the region has enough spare water supply to manage through a severe drought, however it’s important we remain vigilant and prepare now for future changes to keep pace with population growth.   

Seqwater is always looking at ways to optimise the use of the SEQ Water Grid and existing assets.  

To prepare us for the future, we have started planning for a new water treatment plant downstream from the existing Wyaralong Dam and a connection to the SEQ Water Grid as an additional drinking water source. 

Wyaralong Dam is the newest dam in South East Queensland, completed in 2011 in response to the Millennium Drought. Its connection to the SEQ Water Grid would assist in meeting future water demand for the growing communities in Beaudesert and southern Logan areas.   

About the project

Seqwater is currently exploring the option of a new Water Treatment Plant downstream from Wyaralong Dam and connection to the SEQ Water Grid.

The proposed plant would support the growing Beaudesert and surrounding communities.

Project status 

The proposed project is progressing through the business case stages, and Seqwater is progressing with important early enabling works to continue planning for the long-term water security project. 

We are now conducting further site investigations as well as investigating other infrastructure needed to connect the asset to the SEQ Water Grid.   

Seqwater is committed to keeping the local community informed as planning progresses.   

Seqwater is in the process of preparing for the first stages of procurement. If you would like to register your interest for further updates or for project and supplier enquiries, please email the project team at [email protected].   

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  • An aerial photo of Wyaralong Dam

    Proposed Wyaralong Water Treatment Plant - Upcoming geotechnical investigations

    18 Jun 2024

    Geotechnical and soil investigations will be conducted from mid June 2024 until late August 2024 (weather and conditions permitting) to understand the type and strength of the soil and rock, as part of planning for the proposed project. 

    Upcoming works

    Geotechnical and soil investigations will be conducted from mid June 2024 until late August 2024 (weather and conditions permitting) to understand the type and strength of the soil and rock. These investigations will involve collecting soil samples from the road reserve and will not require access to private property. The work will occur during business hours between Monday and Friday.

    Where are investigations happening?

    Investigations are occurring within areas of:

    • Flagstonian Dr, Flagstone
    • Homestead Dr, Flagstone
    • Teviot Rd, South MacLean
    • Teviot Rd, North MacLean 
    • New Beith Rd, New Beith

    What can I expect?

    • Traffic management will be in place where works are in close proximity to the road
    • A small number of workers in the area
    • A small drill rig attached to the back of a vehicle to drill boreholes
    • A small excavator to dig test pits
    • Nearby residents may experience intermittent noise and vibration
    • The drilling and digging process will create small holes and pits in the ground which will be filled in upon completion of the investigations.

    Keeping you informed

    Thank you for your understanding and patience while these important investigations are completed. Seqwater is committed to keeping the local community informed. For more information on the project or to sign up for project updates, please contact:

  • What is the proposed Wyaralong Water Treatment Plant?

    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.

    The BWSU includes three stages:

    • Stage one involved the completion of two concrete storage reservoirs adjacent to the Beaudesert Water Treatment Plant in 2020. 
    • Stage two includes a 24 kilometre pipeline (the South West Pipeline) connecting Beaudesert to the SEQ Water Grid, and a further three kilometre pipeline to connect the Logan supply network to the Wyaralong Transfer Station. The South West Pipeline and Wyaralong Transfer Station reached practical completion in 2024.
    • A proposed stage three, with early works currently underway, proposes a new water treatment plant connecting Wyaralong Dam to the SEQ Water Grid for the first time.

    The proposed project is progressing through the business case stages, with important early enabling works to continue planning for the long-term water security project.

    We are now conducting further site investigations as well as investigating other infrastructure needed to connect the asset to the SEQ Water Grid. 

    Why is the water treatment plant needed?

    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.
    Where will the water treatment plant be located?

    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.

    What are the early enabling works?

    As part of the early enabling works, Seqwater is conducting further site investigations as well as investigating other infrastructure needed to connect the asset to the SEQ Water Grid. Seqwater will also hold industry briefings for procurement opportunities.

    When will construction start and when is the project expected to be completed?

    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.

    What will the community impacts be?

    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 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.

    What other infrastructure will be required as part of the project?

    Investigations are underway to determine the additional infrastructure requirements as part of the project, including a new bulk water pipeline, a water transfer station, additional pump stations and the recommissioning of the nearby Bromelton Off Stream Storage.

    Pending final project approvals, Seqwater will be able provide more information regarding the project, including what new infrastructure will be required.

    What is happening at the pilot water treatment plant at Cedar Grove Weir?

    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.

For more information

For project enquiries, please email the project team at [email protected] or call 3432 7000 (during standard business hours, Monday-Friday). You can also sign up for project updates at the link below.

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