Braidwood Major Overland Flow Investigation

• Project typeCaptial Works
• Project value$99,000
• Project scheduleScheduled to be completed by March 2025
• Contractor nameLyall and Associates

Based on comments received from the community during a public exhibition period for the Braidwood Floodplain Risk Management Study & Plan (FRMS&P), it became apparent that existing development in Braidwood (including numerous main street retail outlets) is impacted by Major Overland Flow during intense short-duration storm events. Assessment of Major Overland Flows was not included in the scope of the Floodplain Risk Management Study (FRMS) which concentrated on mainstream flooding from creeks. The FRMS did however confirm several significant overland flow paths within the township and as such, a recommendation was included in the Braidwood Floodplain Risk Management Plan (FRMP) for Council to commission an investigation to define the nature of and options to manage Major Overland Flow in the urbanised parts of Braidwood (this project).

The project aims to reduce the impacts of existing flooding and flood liability on the Braidwood community, and to reduce private and public losses resulting from floods by assessing major overland flows and potential mitigation measures.

This project received grant funding from the Australian Government.

Lyall and Associates have completed background information collection and model development.

The following activities will be carried out as part of the design process:

1. Site inspection and assessment – Complete
2. Data collection and review – Complete
3. Update and refine existing models – Underway
4. Public consultation – Underway
5. Develop and assess potential mitigation measures
6. Prepare draft Major Overland Flow Investigation report
7. Public exhibition of draft report
8. Finalise Major Overland Flow Investigation report

What's next

• Flood models to be calibrated/validated
• Draft Major Overland Flow Study Report to be developed
• Further community consultation to follow, including meeting of the Floodplain Risk Management Committee

Do you have information about major overland flow paths?

Location

Wallace Street, Braidwood 2622  View Map

-35.443534, 149.799598

Wallace Street , Braidwood 2622

Wallace Street , Braidwood 2622

Braidwood Major Overland Flow Investigation