In 2014-15, the water level at Leslie Harrison Dam was lowered and the gates were removed to reduce the water load on the dam. Detailed investigations were conducted to identify a preferred solution to address the dam improvements required and meet Queensland Dam Safety Management guidelines.
Following detailed investigations, the decision has been made to upgrade Leslie Harrison Dam and maintain its current full supply level once work is complete.
The detailed design for the upgrade of Leslie Harrison Dam has now been completed. Construction is expected to begin in mid-2018 and will take around 12 months to complete, subject to weather. Features of the upgrade design include:
- widening and strengthening of the dam wall
- anchoring the spillway at the crest and the lower end
- improving resilience to extreme weather events and earthquakes
- modifying the water intake tower to improve flood immunity.
The gates will not be returned to the spillway.
A number of tools have been developed to help you learn more about Leslie Harrison Dam, its history, how the dam operates and plans for the future.
- Leslie Harrison Dam - gates and water security information sheet (PDF)
- About Leslie Harrison Dam fact sheet (PDF)
- Leslie Harrison Dam Improvement Project fact sheet (PDF)
- Watch a simulation of Leslie Harrison Dam during ex-Cyclone Debbie 2017(External link)
- Take a look into the upgrade of Leslie Harrison Dam(External link)
- Watch Redland residents tour of Leslie Harrison Dam(External link)
- Learn more about the protected vegetation and koala refuge
