Tomakin, Mossy Point and Mogo Flood Study

The Tomakin, Mossy Point and Mogo Flood Study was adopted by Council on 28 March 2017.

Study area

The Tomakin, Mossy Point and Mogo Flood Study includes the catchments of Tomaga River and Candlagan Creek, which are approximately 130 kmin size. The first catchment has an approximate area of 94 km2, which drains to the Tomaga River, while the second catchment has an approximate area of 26 km2, draining to Candlagan Creek.

The study also includes residential areas in the towns of Mogo, Tomakin, Mossy Point and Broulee (adjoining Candlagan Creek only), which are located in the catchment and are potentially exposed to a flood risk.


A flood study's purpose is to define the flood behaviour under current catchment conditions. This objective is achieved through the development of a suite of hydrologic and hydraulic models that can also be used as the basis for a future floodplain risk management study and plan for the study area. This will also assist Council when undertaking flood-related planning decisions for existing and future developments.

The primary objectives of the flood study are to:

  • determine the flood behaviour, including design flood levels and velocities over a range of flooding events
  • determine provisional residential flood planning areas and flood planning levels
  • undertake provisional flood emergency response planning classification of communities
  • provide a model that can establish the effects of flood behaviour of future development
  • assess the sensitivity of flood behaviour to potential climate change effects such as increases in rainfall intensities and sea level rise.

The study provides information on flood behaviour, including flood levels, potential hazards and projected impacts from climate change. The study is Stage 1 of the flood management process and does not recommend any management actions to manage the impacts on the community from flooding. A separate report will be prepared as Stage 2 of the flood management process to investigate detailed long-term management options.


The Tomakin, Mossy Point and Mogo Flood Study is supported by the Office of Environment and Heritage through funding provided under the NSW Floodplain Management Program.


Community engagement

A draft flood study was on public exhibition from 23 May to 24 June 2016. Community members were invited to read the draft study and provide their feedback.

During the exhibition period, Council hosted a series of public information sessions and invited community members to learn about the project, ask questions and express any views about the draft study. A questionnaire and information sheet was also distributed to residents and business owners within the study area.

The draft study and feedback provided by community members was presented to Council and considered prior to the plan's adoption on 28 March 2017.

More information

For more information, contact Council's Coastal Management Planner, Cameron Whiting: