Install additional structures to enable controlled releases of flood water to the south, reducing pressure on levees.

Capital cost: Likely $20 million to $40 million plus.

Pricing impact: The upfront pricing impact would be an average increase of ten times the current price per hectare.

Service level: Remains the same – protection only in minor and moderate flood events. Potential to require a wider ratepayer base.


BenefitsRisks

Increased floodwater management

High cost due to substantial investment

Improved river healthEnvironmental impact
Flexibility in flood managementComplexity of operation
Uncertainty of effectiveness in reducing pressure on levees


Flood maps

Loch Garry flood map – Option 2A: Fairer distribution of water during a minor flood event (10.36m)

Loch Garry flood map – Option 2A: Fairer distribution of water during a minor flood event (10.36m)

Loch Garry flood map – Option 2A: Fairer distribution of water during a moderate flood event (10.9m)

Loch Garry flood map – Option 2A: Fairer distribution of water during a moderate flood event (10.9m)

Loch Garry flood map – Option 2A: Fairer distribution of water during a major flood event (12.3m)

Loch Garry flood map – Option 2A: Fairer distribution of water during a major flood event (12.3m)