Wollondilly has a number of areas subject to flooding. The Floodplain Development Manual sets out the management of flood risk in NSW. To receive flood information please complete the Application for Flood Information.
Floodplain Risk Management Committee
The process of managing flood risk is assisted by the Floodplain Risk Management Committee. The committee is made up of Councillors, Council Staff from a variety of areas across Council, NSW Government Agencies and Community representatives. The Committee has an advisory role and makes recommendations to Council for consideration. To read more about this committee visit the Floodplain Risk Management Committee page.
Wollondilly Shire Wide Flood Study
Thanks for sharing your local knowledge and experiences!
Wollondilly Shire Council is undertaking a Shire Wide Flood Study that ranges from Warragamba and Silverdale to Yanderra, and Nattai to Appin, in an effort to better understand flooding across the Wollondilly Local Government Area.
Council has engaged consultants Advisian to carry out the Flood Study, which will involve detailed flood modelling using latest topographic data and modelling techniques. Flood mapping will be produced to identify existing flood risk and inform future floodplain management. The Flood Study will cover the eastern portion of Wollondilly Shire comprising 700 km2.
Local knowledge and personal experiences are valuable in helping to identify local flooding issues. We have sought your input – for example information including floodmarks in your area, such as the height that floodwaters reached against a tree or building during a particular flood event.
We had asked you to:
- Identify flood locations on our map, include dates and upload photos
- Take our survey
- Participate in our forums - where you can ask questions and share information about your observations and experiences
Council is undertaking this Flood Study under the guidance of the NSW Flood Prone Land Policy, which requires Council to manage the existing flood risk with consideration to the social, economic and environmental impacts of flooding for the short, medium and long term. Thankyou to everyone who provided input on our Stonequarry Creek Floodplain Risk Management Study and Plan. This Shire Wide study follows on from that.
The area of Picton including the CBD has a long history of flooding due to its location within the Stonequarry Creek floodplain.
A number of flood studies have been completed on Stonequarry Creek, which look at possible flooding behaviour in the area and assist in identifying the appropriate controls for development to minimise flood risk. Such controls may consist of flood planning levels which are normally used to determine minimum floor levels in new developments.
It is important that Council’s understanding of flooding and associated risks at Stonequarry Creek remain up-to-date in order to be proactive in managing risks to the community. As a result, Council is progressing through a process to manage flooding risks within the Stonequarry Creek catchment and the latest information is available below.
Picton experienced a significant event in June 2016 and Council commissioned Advisian to undertake a Post Event Analysis in 2016.
The event analysis was also incorporated into the Stonequarry Creek Flood Study by Advisian that was close to completion before the event.
The Stonequarry Creek Flood Study by Advisian was completed in 2017 and placed on public exhibition in 2018 as the start of a Floodplain Risk Management Study.
The first stage of the Floodplain Risk Management Study included a review of the existing flood study by WMAwater. That review has resulted in a draft Flood Study Update.
A Draft Floodplain Risk Management Study and Plan for Stonequarry Creek were completed using the Draft Flood Study Update in 2019 and publicly exhibited on Your Say Wollondilly in 2020.
Council resolved at its June 2020 meeting to adopt the Draft Flood Study Update and the Draft Floodplain Risk Management Study and Plan after considering the submissions received during the exhibition. The final versions of these documents will be available soon.