Why is the Flood Study being updated and what’s changed?

We use computer flood models to estimate where it might flood, and by how much. From time to time, the models are updated and predicted flood levels may change. For the Minnegang Creek Flood Study, we’ve considered Council's revised Blockage Policy, which helps us work out how blocked stormwater structures might affect flooding. We have improved information, such as recent data from land and waterway surveying. We've included an extended network of drainage pits and pipes and used more improved and detailed modelling techniques. We’ve also extended the mapping to include additional flood-prone areas and waterways that were not previously mapped.

The updated Blockage Policy generally gives us lower flood levels upstream of main culverts. A culvert is a tunnel or drain structure built under a road or railway to allow water to flow underneath. The maps in the report show what the flood levels are in different areas in the catchment. You can view the report in the Document Library, at the drop-in information session or at Warrawong Library.

What happens next?

After we’ve completed the overland flow study, we’ll begin a Floodplain Risk Management Study and Plan to look at what the risks/damages from floods might be and what we could do to mitigate (reduce) those risks. Then we’ll roll out the Plan! Every 5-10 years, we go back to the beginning of this process and start with a review of the overland flow study to consider new survey data, policy changes, recent major flood events and changes in the catchment such as flood mitigation works or new development.

Do the maps in the draft report show the flood levels for my property?

There are hundreds of individual properties in this catchment. The scale of these maps makes it hard to find individual properties and see what the estimated flood levels might be. Sometimes you can get a better look by opening the maps on a computer and zooming in to the area where your property is, however you’re just looking at the estimated levels for broad areas of the catchment rather than specific levels for individual properties. The report is also a draft, which means some information may be updated before the Study is finalised. Council has historical flood level records and/or our completed flood studies for some properties, but not all. Please contact our Customer Service team on (02) 4227 7111 to find out what’s available for your property.

What flood mitigation work is Council doing in this catchment?

We’ve purchased two houses that were identified in the Floodplain Risk Management Study and Plan for Voluntary Purchase, as they were at high risk of serious flooding and not safe to live in. Houses we buy as part of the Voluntary Purchase Scheme are knocked down and the land is turned into parks and open space. We’ve also done weed control, work to maintain creek banks and planting at various locations along Council-owned portions of creeks throughout the catchment. 

How does Council manage flood risk?

Each year, Council spends millions of dollars on stormwater and floodplain management. Our team of flood experts prepare flood studies and floodplain risk management studies that help us understand the flood behaviour for a catchment and see if there are any ways of reducing flooding risk in an area. 
Floodplain risk management studies include a plan of potential solutions aimed at reducing the existing and future flood risk. Examples of these solutions include: 

  • Emergency response plans based on detailed understanding of flood behaviour
  • Building new structures that collect and carry stormwater into drains or creeks, such as detention basins and swales, or improving existing ones to better manage stormwater and floods 
  • Land zoning that says what can and can’t be built on flood-prone land
  • Voluntary purchase of houses built in high flood risk areas 

Why doesn’t Council clear out creeks?

Council is responsible for maintaining watercourses (e.g. creeks, overflow paths or drainpipes) on Council-owned land and has a maintenance program for this. Most watercourses in our city are on private property and their maintenance is the responsibility of the land owner. In these cases, Council is unable to perform any work on the watercourse. If you need advice on maintaining watercourses, please contact our Customer Service team on (02) 4227 7111. 

I don’t understand English. Is there a service that can help?

There are services you can use to help you understand this information if you find it hard to communicate in English. 

Language aides are people who work at Council and can speak languages other than English. They are not professional interpreters, but can help customers who are dealing with Council. We currently have language aides for:

  • AUSLAN (sign)
  • Macedonian
  • Croatian
  • Mandarin
  • Greek
  • Polish
  • Indonesian
  • Serbian
  • Italian
  • Turkish
There is no cost to use our language aides. Please ask us if you’d like a language aide to help you.

You can use the Australian Government’s Translating and Interpreting Service to deal with Council in languages other than English. To phone Council using this service, call 13 14 50 and ask them to connect you to Wollongong City Council on (02) 4227 7111. For more information, visit www.tisnational.gov.au. 

How will my feedback be used?

At the end of the engagement period, all feedback is read and considered. A report will be produced and provided to Councillors, and they will consider whether to adopt the Study.

How can I join the conversation?

Write: Locked Bag 8821, Wollongong DC 2500 
Phone: (02) 4227 7111        
Drop-in Information Session:
Saturday 7 September 12:30pm - 2pm
Warrawong Community Centre
7-9 Greene Street, Warrawong  

You can also submit feedback using the online form.