Avoca Lagoon Floodplain Management Plan

Brief description

Seven flooding precincts have been identified around the lagoon foreshore. These have been sub-divided
into four management areas.
These management areas have been classified for flood hazard as:
High Hazard - Floodways
- Avoca Lagoon beach berm;
- Saltwater Creek, from the upstream study boundary to its confluence with Avoca Lagoon
(identified as Saltwater Creek floodway); and
High Hazard – Low Hazard Floodway (Floodway Investigation area)
- Avoca Lagoon at its entrance to the ocean (Floodway/Investigation area);
Low Hazard - Flood Storage
- Avoca Lagoon and foreshores excepting high hazard areas above.
These management areas are illustrated on Figure 2, while Figure 3 provides more detailed information for
the Avoca Lagoon entrance area and Figure 4 tables the specific provisions applicable to each of the
management areas.
Council has adopted a policy of opening the lagoons when water level reaches RL 2.09 m AHD (identified
as the let-out-level). Council has, in the past, also adopted a policy that requires new buildings to have
floor levels above RL 3.7 m AHD. These two policies effectively constitute Council's current floodplain
management practice around Avoca Lagoon.
Specific components of the Floodplain Management Plan are outlined in the report

Full description

Avoca Lagoon - Floodplain Management Plan
Avoca Lagoon & Cockrone Lagoon - Corrections to FS, FPMS & FRMP