Collins Creek Catchment

Council completed the Collins Creek Floodplain Risk Management Study and Plan dated September 2025 for this catchment. The study was prepared in accordance with the NSW Government’s Flood Risk Management Manual 2023 and the Australian Rainfall and Runoff 2019 guidelines.

The study provides the most up to date information on flooding for this catchment. It also identified flood risk across the catchment, investigated various options and recommended a range of flood mitigation measures.

The Collins Creek Floodplain Risk Management Study and Plan dated September 2025 also includes the updated version of the Collins Creek Flood Study (2019) with ARR19 guidelines. The study also supersedes previous study of Combined Catchments of Whartons, Collins and Farrahars Creeks, Bellambi Gully and Bellambi Lake Floodplain Risk Management Study and Plan (2014).

The current Floodplain Risk Management Study and Plan (2025), including reports and model results are available to download from NSW Flood Data Portal using the link below.

Collins Creek Floodplain Risk Management Study & Plan - Flood Projects - NSW Flood Data Portal

Ursula Road Scheme, Bulli

Council is currently investigating a number of flood mitigation measures in the Ursula Road area, including:

• A flood deflection levee on the northern bank of Whartons Creek, immediately upstream of Franklin Avenue.
• Upgrade the existing Franklin Avenue culverts and improve the waterway area for the downstream channel
• Local drainage improvements along Ursula Road/Trinity Row.

We will talk with the community about this investigation when draft concepts have been developed.

Kells Crescent Drainage Upgrade

We’ve started investigating options to reduce flood waters affecting residential properties.

Debris Control Structures

We’ve finished concept plans for four debris control structures. These will help floodwaters drain more effectively and reduce risk to public and private property. Planned locations for the debris control structures are Gordon Hutton Park, Russell Vale Golf Course, Albert Street and Brompton Road.

West Street Detention Basin

In 2017 we started making plans for a new detention basin to reduce the impact of flooding downstream of West Street, Russell Vale. This is expected to be built on land owned by Wollongong Coal Limited.

Bellambi Gully Scheme

We’ve started on plans to reduce floodwater affecting residential properties between the railway line and Gladstone Street, Bellambi. This includes:

• Channel improvement works between the railway line and Holy Spirit College
• Upgrading culverts at Pioneer Road and Gladstone Street.

Voluntary Purchase Scheme

We’ve bought and cleared one property in this catchment under a Voluntary Purchase Scheme. One more property is earmarked to be purchased if the opportunity comes up in future.

You can help our research and planning for floods in this catchment by sharing your past experiences.

If you have photos or other information about flooding on your property, please contact us.