Removal of flow control structures and sufficient levees to return the area to natural flow conditions.

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: No immediate change to the existing service. The Loch Garry Flood Protection District would cease to exist as a service following the return to natural flows.


BenefitsRisks
Restoration of natural ecosystemHigh cost and substantial investment for decommissioning works
Sustainability of a self-regulating floodplainFlood protection no longer guaranteed at minor and moderate levels
Lower or little long-term maintenance requiredUnpredictable outcomes
Reduced risk of flood damage from random and unpredictable levee failure


Flood maps

Loch Garry flood map – Option 3: Gradual return to natural flows during a minor flood event (10.36m)

Loch Garry flood map – Option 3: Gradual return to natural flows during a minor flood event (10.36m)

Loch Garry flood map – Option 3: Gradual return to natural flows during a moderate flood event (10.9m)

Loch Garry flood map – Option 3: Gradual return to natural flows during a moderate flood event (10.9m)

Loch Garry flood map – Option 3: Gradual return to natural flows during a major flood event (12.3m)

Loch Garry flood map – Option 3: Gradual return to natural flows during a major flood event (12.3m)