Catchment area: Mount Keira, West Wollongong, Figtree, Mount Kembla, Unanderra, Farmborough Heights and Berkeley
This catchment has experienced a number of major floods, the most recent in August 1998 and October 1999 resulting in extensive damage to public and private property. We've been working with the community and government agencies to reduce the impact of flooding in this catchment.
Flood risk planning
In 2006, we completed a Flood Study, Floodplain Risk Management Study and Floodplain Risk Management Plan for this catchment. These studies were jointly funded by Council and the NSW State Government. The Flood Study identifies the nature of the flood risk. The Floodplain Risk Management Study identifies the impacts of flooding on the community and measures to reduce flood risk. The Floodplain Risk Management Plan outlines measures to address the existing, future and continuing flood problems in the area and provide guidelines for all future developments in the area. Links to the reports are provided below.
Snapshot of flood risk and flood damages
The cost of the average annual damage in the study area is about $13.5 million. This is a measure of the cost of flood damage that could be expected each year on average by the community.
A 20 per cent Annual Exceedance Probability [AEP] flood is expected to cause damages of $10 million and flood 44 houses and 16 businesses above floor level.
A one per cent AEP flood is expected to cause damages of $146 million and flood 317 houses and 59 businesses above floor level.
Implementation of mitigation measures
Since 2006, Council has been actively implementing the measures identified in the floodplain risk management plan. Here is a snapshot of where we are at in terms of implementing the high-priority measures.
Flood Study Review
In October 2017 Council started a review of the Flood Study to provide greater detail of flood behaviour in the catchment. The more detailed modelling will take into account better quality ground level survey, updated development information and Council's revised Conduit Blockage factors.
The review findings will be used to update technical data relating to the nature and extent of flooding and will guide the subsequent review of the Floodplain Risk Management Study and Plan (2006). The review of the Flood Study will be overseen by a Floodplain Risk Management Committee which includes representatives from community groups and State agencies.
Have Your Say
If you have any information on past floods that you have not provided to Council, could you send it to Council via email or mail to: Wollongong City Council, Locked Bag 8821, Wollongong DC NSW 2500.
Information in the documents below may change on completion of the review.