Central Coast Council are preparing a Floodplain Risk Management Study and Plan for Davistown and Empire Bay Catchments.

With the support of the NSW Government’s Floodplain Management Program, Central Coast Council is preparing a Floodplain Risk Management Study and Plan for the Davistown and Empire Bay catchments including the suburbs of Davistown, Empire Bay and portions of Bensville.


Flooding has the potential to cause considerable damage and disruption to a community. In addition to tangible damage, floods also impose high levels of intangible damage such as increased levels of stress on affected communities. The primary goal of the project is to reduce the impact of flooding on the community.


The Davistown and Empire Bay Flood Studies (Cardno Lawson Treloar, 2010) determined the flood behaviour within their respective catchments due to local storm runoff from a range of flood events. The studies determined the nature and extent of flooding through the estimation of design flood flows, levels and velocities.


Flood impacts due to ocean‐driven storm events within the Brisbane Water estuary are detailed in the Brisbane Water Foreshore Flood Study (2010) and subsequent Brisbane Water Floodplain Risk Management Study & Plan (2015). Regional scale options for managing the flood risk from ocean storm events were considered in the latter study.


This project is the next step in the NSW Government’s Floodplain Risk Management Process. Using the information from the preceding Flood Studies, it will evaluate, recommend and prioritise measures for managing the existing, future and continuing flood risk across the catchment.


The preparation and implementation of Floodplain Risk Management Plans is the cornerstone of the NSW Government’s Floodplain Management Program that is delivered in accordance with the 2005 NSW Government Floodplain Development Manual. Management plans can eliminate the ad-hoc decision-making process which has contributed to many present-day flooding problems.


The study is being prepared by the consultant Rhelm.


The Catchments and Coast Committee will assist Council in the development and implementation of a floodplain risk management plan for the catchment. This advisory group comprises of elected Council members, specialist Council staff, various state agency representatives and also members of the local community. 


As part of this study, Council will work collaboratively with State Government, consultants and the community to assess options for managing flood risk such as protection works, improved infrastructure, revised emergency response procedures and planning controls. The Floodplain Risk Management Plan will recommend the most appropriate measures for implementation.


The project will be jointly funded by Central Coast Council and the NSW Department of Planning, Industry and Environment (former NSW Office of Environment and Heritage).


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