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Detailed Design

Brandy & Water Creek Bridge Investigation & Design of Creek Modification

One of the flooding areas identified by the Allans Creek FRMSP is along Brandy and Water Creek in the vicinity of the Darragh Drive, Figtree. This FRMSP identified a number of residential properties on the east bank (left bank) of Brandy and Water Creek which experience overfloor flooding in the 1% AEP. The FRMSP recommended a further investigation of options to potentially decrease the overfloor flood risk. One of the options is to lower the west bank (right bank) of the creek opposite these residential properties to increase conveyance and alleviate the potential overfloor flooding as a result.

This study intends to achieve the following objectives:

  • Investigate the flood behaviour under the existing conditions by incorporating the additional ground survey data;
  • Investigate the flood management options recommended in the Allans Creek FRMSP;
  • Undertake an assessment of options to ensure the proposed creek works are consistent with the works proposed in the Allans Creek Catchment Riparian Management Plan (Forbes Rigby, 2002), and maximise the hydraulic and economic benefits.
  • Evaluate the restrictions related to the proposed works aimed at reducing the social, environmental and economic impacts of flooding over a range of potential flood events, including 1% AEP, 2% AEP, 5% AEP, 10% AEP, 20% AEP, and the Probable Maximum Flood (PMF);
  • Provide a concept design suitable for preliminary benefit-cost analysis and community consultation, and;
  • Make a recommendation to Council based on a Multi-criteria assessment.

Additional Information

Field Value
Title Brandy & Water Creek Bridge Investigation & Design of Creek Modification
Publication Date 1 May 2014
Themes Land and Resource Management
Spatial Extent
Map data © OpenStreetMap contributors
Council/LGA Wollongong City Council
Author/ Prepared by Cardno
Publish date 19 July 2019
Update date 19 July 2019
Approval State Approved
Submitted for approval 19 July 2019
Submitted by Akhil Sud
Approved 19 July 2019
Approved by dstazic
Identifier 6d029412-4c4d-4ce1-b264-8e9a0e8315f9