Upgrade the regulator, use the current operating rules, clarify ownership of all levees in the Lower Goulburn section.

Capital cost: Approximately $20 million for a 100-year asset life or retrofit for $10 million for a 50-year asset life.

Pricing impact: The upfront pricing impact would be an average increase of 13 times the current price per hectare.

Service level: Remains the same – protection only in minor and moderate flood events.


BenefitsRisks
Improved operating efficiencyStill requires a significant investment
Clearer ownership and responsibility for leveesUncertainty around long-term effectiveness
Moderate investmentImplementation would be complex

Potential for high repair costs following future flood events


Flood maps

Loch Garry flood map – Option 1C: Base case plus regulator upgrade during a minor flood event (10.36m)

Loch Garry flood map – Option 1C: Base case plus regulator upgrade during a minor flood event (10.36m)

Loch Garry flood map – Option 1C: Base case plus regulator upgrade during a moderate flood event (10.9m)

Loch Garry flood map – Option 1C: Base case plus regulator upgrade during a moderate flood event (10.9m)

Loch Garry flood map – Option 1C: Base case plus regulator upgrade during a major flood event (12.3m)

Loch Garry flood map – Option 1C: Base case plus regulator upgrade during a major flood event (12.3m)