In 2012-13, we commissioned an independent review of our 26 referable dams, which found improvements are needed at a number of our dams to meet the Queensland dam safety guidelines into the future.
We have prioritised a program of dam upgrades in a staged approach to give us time to scope, design and plan, while maintaining public safety, security of water supply and delivering best value for money.
Cooloolabin Dam is one of a number of dams identified for upgrade in the next six years.
Cooloolabin Dam upgrade
The assessment at Cooloolabin Dam identified a significant upgrade (about $28 million) would be required to meet the relevant dam safety guidelines. We have prioritised a program of dam upgrades in a staged approach to give us time to scope, design and plan, while maintaining public safety, security of water supply and delivering the best value for money.
As a short term solution, the water level at the dam was lowered in 2013. In late 2015, a slot was cut in the centre of the spillway to maintain this lower water level and delay the need for a significant upgrade.
Lowering water levels is an industry-accepted practice to best manage the safety of dams either temporarily or in the long term. Lowering the water level in a dam reduces water pressure and loads on the dam wall, and can also create temporary storage to increase its capacity to mitigate floods.
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