Proposal Stage of Development: Options assessment—post preliminary business case
Building Queensland Role: Lead
Paradise Dam is located approximately 20 kilometres north-west of Biggenden and 80 kilometres south-west of Bundaberg on the Burnett River. It is owned, managed and operated by Sunwater.
During the 2013 floods, extensive scour occurred downstream of the primary spillway. Sunwater immediately repaired the scour and downstream toe of the dam.
Following a comprehensive safety review and risk assessment, Sunwater identified that further upgrades are required to ensure the dam meets the latest design standards and operates safely during extreme weather events.
Sunwater completed the preliminary business case for the project in 2018.
In 2019, in preparation for the detailed business case, Sunwater engaged additional investigations into the stability and shear strength of the dam and spillway. Through those investigations, Sunwater identified that the dam needed to be lowered as soon as possible due to safety concerns in the event of a significant flood.
To mitigate this risk and to facilitate essential works, in September 2019 the Queensland Government announced it would lower the dam by five metres.
Building Queensland is assessing options to ensure water security for the region for future economic growth and to maintain community safety. Options to upgrade the existing dam at full supply, as well as options to lower the dam, are being considered to identify the optimal long-term solution for Paradise Dam