Why upgrade the Beaudesert Water Supply?

The Beaudesert area is growing rapidly. Our projections show the existing Beaudesert Water Treatment Plant would no longer be able to meet peak demand by 2021 without the planned upgrades. Improving water supply reliability in the Scenic Rim will support the continued growth of Beaudesert and create local jobs.

Will the projects impact my property?

We are already in contact with the small number of property owners affected by the current plans, however those plans may change as a result of site investigations. If future changes to project plans impact your property, Seqwater will contact you directly to discuss those impacts. If you have any concerns about the impact of the proposed upgrades on your property, please contact communications@seqwater.com.au to arrange to speak to a member of the project team.

Have you considered environmental and cultural heritage impacts?

Identifying risks and mitigating environmental and cultural heritage impacts are an important part of the planning process for projects. Desktop environment and heritage assessments have been completed and field investigations are continuing. We will be developing Cultural Heritage Management Plans with the Aboriginal Parties for the project area to minimise potential harm. 

Stage 1: Beaudesert Storage Upgrade

Why are you upgrading treatment processes at the Beaudesert Water Treatment Plant?

Heavy rainfall and flood events cause agricultural pollutants and other run off to enter the Logan River. This can result in the Beaudesert Water Treatment Plant shutting down as it cannot effectively treat the raw water.

All water produced by the Beaudesert Water Treatment Plant is constantly tested to ensure it meets Australian Drinking Water Quality Guidelines. When the raw water quality is too poor for the plant to meet those standards, the plant is shut down temporarily until the raw water quality improves. Depending on the duration of the shut down, treated water may be supplied to Beaudesert from other areas via water tanker. Current upgrades to treatment process mean that it will be more capable of treating poor raw water qualities, reducing the need for temporary shut downs and improving supply security in the short term.

Why build new water storages at Beaudesert?

The Scenic Rim area is not connected to the SEQ Water Grid. This means if demand exceeds the Beaudesert Water Treatment Plant capacity to produce drinking water, we have to rely on stored water or transport water into Beaudesert via water tanker to maintain water supply.

The new water storage reservoirs will hold up to 5.1ML (million litres) of treated drinking water. This stored water can be drawn upon during peak demand periods, and can be used to supplement supply during maintenance works and other network shortages. This will improve the reliability of water supply for the Scenic Rim region.

What will the new storage reservoirs look like?

Two concrete tanks will be built on the Helen Street site, in front of the existing water treatment plant. Each tank will be approximately 25m diameter and stand around 7.5m tall. 

What will happen to the new reservoirs when stages 2 and 3 are finished?

The new storage reservoirs form part of the long term water supply security plan for the region, receiving water from the new bulk water pipeline and water treatment plant once they are built.

What can I expect during construction of the new storage reservoirs?

During construction you can expect some increased noise and dust, which will be monitored to ensure it meets requirements. There may be short term traffic control in place during the delivery of materials. There will be no interruption to water supply during these works.

Stage 2: South West Pipeline

Where will the bulk water pipeline be built?

The new bulk water pipelines will be underground where possible. You can see the planned pipeline route at this link.

We are currently investigating environmental, social, cultural and geological constraints in the area along the proposed route. The route may change as a result of consultation and site investigations.

How will the pipeline cross the river?

There are four major river crossings and several smaller creek crossings along the proposed route. The design stage for the South West Pipeline will determine whether pipelines should pass over waterways or under them, based on environmental and geological constraints. Construction techniques will be planned to manage environmental impacts.

Why does stage 2 include reservoirs and pumps near Cedar Grove weir?

Water storage reservoirs, a pump station, and associated infrastructure will be built at the site of the future Wyaralong Water Treatment Plant as part of the South West Pipeline project. These assets are necessary for the operation of the Pipeline, and have been designed to integrate with the future Wyaralong Water Treatment Plant when it is built.

Will the South West Pipeline supply water to Cedar Grove and other communities along the pipeline route?

No. The South West Pipeline is a bulk water pipeline. Water supply to properties is provided by your local water retailer; Logan Water in Logan City Council areas or Queensland Urban Utilities in Scenic Rim Regional Council areas

What can I expect during pipeline construction?

Underground pipelines may be constructed by either cut and fill trenches or by tunnel boring. More detail of construction methods will be available when planning has been completed. Construction impacts are likely to include noise, dust and traffic delays along the length of the pipeline route. 

Stage 3: Wyaralong Water Treatment Plant

Where will the new water treatment plant be built?

A new water treatment plant will be built adjacent to the Cedar Grove Weir, with water supplied from Wyaralong Dam and the Logan River. 
You can find a map of the site at this link

Why are you building a new plant instead of upgrading the existing Beaudesert plant?

The raw water supply available at the Beaudesert Water Treatment Plant is not expected to be enough to meet demands beyond the year 2030. The new Wyaralong Water Treatment Plant has the benefit of a greater raw water supply, coming from two sources; the Logan River and Wyaralong Dam. Further, the new Wyaralong Water Treatment Plant process will be designed to be more resilient to the variable quality of raw water than the existing plant.

Why are you using water from Wyaralong Dam for drinking water supply?

Wyaralong Dam and the Cedar Grove Weir were built during the Millennium Drought to provide an additional drinking water source for South East Queensland. The drought broke around the same time construction was completed on these projects, and construction of the new water treatment plant and bulk water pipeline were deferred. They have now become necessary to respond to increasing demand in the region. The Beaudesert Water Supply Upgrade will deliver the missing links of this drought response project and improve water security for all of South East Queensland.

Will using Wyaralong Dam for drinking water supply affect recreation on the dam?

The use of Wyaralong Dam as a drinking water supply will not affect what types of recreation are permitted on the dam. However, releases of water to the treatment plant during dry periods may cause water levels to fall, making some recreational activities impractical or unsafe.

How much water will the new water treatment plant produce?

The new plant will initially be capable of producing up to 30ML (million litres) of drinking water per day. By comparison, the existing Beaudesert Water Treatment Plant produces up to 4ML per day. The long term plan for the site includes two future expansions, each capable of treating an extra  45ML, to be delivered as demand increases. 

What areas will be supplied with water from Wyaralong Water Treatment Plant?

The new water treatment plant will supply Beaudesert as well as the growing communities of Flagstone and Yarrabilba. This will reduce the existing demand on the SEQ Water Grid from the Logan area.

What will happen to the Beaudesert Water Treatment Plant?

The Beaudesert Water Treatment Plant will be decommissioned when the Wyaralong Water Treatment Plant is fully operational.

Will the proposed Cedar Grove Waste Water Treatment Plant impact the Wyaralong Water Treatment Plant?

We are working with Logan Water Infrastructure Alliance to minimise the risk that the Cedar Grove Waste Water Treatment Plant poses to the quality of raw water available at Cedar Grove Weir. The new waste water treatment plant will discharge into the Logan River below the Cedar Grove Weir.

How will flooding impact the new water treatment plant?

The Wyaralong Water Treatment Plant will be built above the 1 in 10,000 year flood line, making it very unlikely to be flooded. The new plant will also be directly connected to the SEQ Water Grid, providing an alternative water supply during any unforeseen plant shut downs.

Heavy rainfall and flood events can cause agricultural pollutants and other run off to enter waterways, resulting in poor raw water quality. When raw water quality is too poor for the plant to effectively treat, the plant will be shut down and water supplied from other areas through the SEQ Water Grid.