Sideling Creek Dam at Lake Kurwongbah is set for $20 million in improvement works, to enable the water storage to continue to operate safely into the future.

Construction work for the upgrade is scheduled to begin next month and is being carried out in line with Seqwater’s Dam Improvement Program.

The dam, which was commissioned in 1957 and upgraded in 1969, will undergo work to strengthen the main embankment of the dam and its concrete spillway.

The upgrade will also improve fish movement downstream to reduce the risk of fish stranding, which has occurred in recent years following rainfall events that has caused the dam to spill.

In what is sure to be welcomed news for those who use the lake for recreation, once the upgrade is completed, the water storage will return to its normal level after it was lowered in 2015.

Construction site mobilisation is expected to begin in mid-May 2018, with the project expected to take 12 months to complete.

To facilitate construction, a turning lane from Dayboro Road into the Rowing Club is being established to improve construction access to the site – as well as access for the Rowing Club.

This safety improvement will be one of the permanent legacies of the project.

Seqwater Acting Chief Executive Officer Dan Spiller the Dam Improvement Program allowed South East Queensland’s water storages to continue to operate safely into the future.

Mr Spiller said Sideling Creek Dam was one of a number of dams across the region to be upgraded over the next five years.

“Dams are long-life assets and require continual assessment, monitoring and maintenance,” he said.

“Over the years, there have been advances in dam design and we now have a greater understanding of extreme weather such as floods and earthquakes.”

Mr Spiller said people would be able to continue to use the lake for recreation during the upgrade work.

“While we’re undertaking this work, there may be an increase in noise and traffic in the local area,”

“The project will comply with set requirements and will be managed to have minimal impact on the community.

“We appreciate the understanding and patience of locals during this work.’’

Seqwater will continue to keep local residents and the Petrie community informed of the construction works as the upgrade progresses.

This will include a stall at the Petrie Markets on Sunday 22 April and a community information session and BBQ at Mick Hanfling Park on Saturday 28 April.

  • Sunday 22 April 2018 Old Petrie Town, 901 Dayboro Road, Whiteside 8am – 2pm Community BBQ and information session
  • Saturday 28 April 2018 Mick Hanfling Park, Torrens Road, Kurwongbah 11am – 2pm

For more information about the project, visit or follow Seqwater on Facebook.


Facts about Sideling Creek Dam Upgrade

The upgrade of the dam, located near Petrie, will include:

  • Installing a new sand filter buttress along the downstream shoulder of the main dam, as well as a creating a stabilising weighting berm. This involves strengthening the main dam wall and spillway to help the structures withstand earthquakes, extreme weather events and to comply with current engineering standards and safety guidelines.
  • The height of the spillway guide walls and upper chute walls on both sides will be raised and reinforced to add additional flood mitigation and manage the impact of extreme weather events to future proof the dam against the impacts of climate change.
  • A plunge pool downstream of the spillway will be constructed to manage erosion, protect the structure and improve fish movement downstream.
  • The spillway slot will be reinstated which means the lake will return to its original full supply level.