The project works required to be delivered under the Stormwater Management Plan (SMP) are best described as 8 sub-projects. There is a logical progression in which works need to be undertaken with consideration to:
- The relative effectiveness of the individual works.
- The requirement to ensure the staging of works does not result in the temporary transfer of a flood problem elsewhere.
- Works involving temporary detention of flood waters can proceed at any time. They provide benefit even if other works are not completed.
- Channel upgrades should progress from downstream to upstream and should follow the construction of flood detention works, because channel upgrades are sized for reduced outflows from upstream detention systems.
- The flow diversions from Keswick Creek to Brown Hill Creek must be staged to follow the Lower Brown Hill Creek upgrade.
Stage 1
Flood detention: Ridge Park flood control dam and South Park Lands.
Stage 2
Lower Brown Hill Creek upgrade.
Stage 3
Flow diversions from Keswick Creek to Brown Hill Creek.
Stage 4
Upper Brown Hill Creek upgrade.