Central Coast Council has prepared a draft Floodplain Risk Management Study and Plan for the Northern Lakes catchments with financial assistance from the NSW Government through their Floodplain Management Program The draft report was prepared following detailed analysis of the feedback we received from our first round of community consultation, and an assessment of potential flood risk management measures.
Council has identified the Northern Lakes catchments as being subject to overland flooding across suburbs immediately surrounding Lake Munmorah, Budgewoi Lake and the northern part of Tuggerah Lake, from Tuggerawong and Norah Head in the south to Lake Munmorah in the north including;
- Lake Haven
- San Remo
- Buff Point
- Lake Munmorah
- Norah Head
The draft report was on public exhibition for a period of six weeks to obtain community feedback before being finalised and adopted by Council. Submissions were accepted until Monday 15 March 2021.
How to get involved
The community were invited to:
- review the draft study and plan: take a look at the draft report for the Northern Lakes Floodplain Risk Management Study and Plan online in the document library on the right of this page. A hard copy of the report can be found at Toukley Library.
- attend a community drop in session: Tuesday 2 March, 4-7pm, at Blue Haven Community Hall, 1 Apsley Court, Blue Haven, and Wednesday 3 March, 4-7pm, at Halekulani Community Hall, Halekulani Oval, 107 Scenic Drive, Budgewoi. Bookings highly recommended as numbers will be restricted in line with COVID-19 requirements.
- register for a one-on-one online session: If you have a question and are unable to get to a community drop in, you can register to attend one of our online one-on-one meetings to discuss the draft reports with Council project officers.
- read our frequently asked questions: make sure you check out our frequently asked questions on our main floodplain management page to see if we haven't already answered your question!
- fill out the online submission form: If you have some feedback that you would formally like to provide Council on the study and plan, fill out our submission form (now closed) and it will be evaluated before we finalise the document.
Submissions were accepted until 5pm Monday 15 March 2021 by:
- Email: email@example.com
- Mail: PO Box 20, Wyong NSW 2259
- Online: submission form (now closed).
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Got a question?
Visit our floodplain management page and check out our FAQs.
*This website does not necessarily represent the opinions of the NSW Government or the Department of Planning, Industry and Environment.
The aim of this Study and Plan is to reduce the impact of flooding and flood liability on the residents living within the catchment area. As part of the NSW Government's Flood Prone Land Policy, consideration is given to social, economic, environmental and flood risk parameters to help evaluate a range of flood mitigation measures.
The Study and Plan prepared by the consultant Manly Hydraulics Laboratory for Council and is funded by Council with additional funding from the Department of Planning, Industry and Environment (DPIE).
Council invited all residents within the study area to complete a survey prepared by the flood consultant, Manly Hydraulics Laboratory, to help identify flooding “trouble spots” and allowing for a targeted assessment of where flood risk reduction measures would be best implemented. This questionnaire closed on 14 December 2019.
The results from the survey have been considered and incorporated into the draft Floodplain Risk Management Study and Plan which is was placed on public exhibition from 15 February to 15 March 2021. An engagement summary has been prepared and is available to view here.
Appendix A - Community Newsletter and Questionnaire
Appendix C - Flooding Levels
Appendix D – Hydraulic category and hazards
Appendix E – Flood emergency response classifications
Appendix F – Flood planning area
Appendix I – Damage assessment results
Appendix J – Preliminary modelling results
Appendix K – Detailed management option assessment
Appendix L - Climate Change Impact
About Northern Lakes catchment
The suburbs within the catchment are densely populated and the catchment is drained by a network of channels and stormwater drains. During periods of heavy rainfall, stormwater infrastructure can be overwhelmed, exceeding capacity and there is potential for overland or 'flash' flooding across homes and streets which flows into the Northern Lakes.
For residents within the catchment who have experienced severe flood events in the past, this causes significant disruption and inconvenience. There is also potential for property damage as well as risk to life.
Overland Flood Study findings
An overland flood study for the catchment was prepared in 2015. The outcome of the study confirmed that inundation of approximately 2,142 properties is predicted to occur during a 1% AEP event or a 1 in 100-year flood event. Problem areas have been mapped which identify the Flood Extents including:
- Panorama Avenue and Wirriga Avenue, Charmhaven
- Buff Point Avenue and Karangal Crescent, Buff Point
- Beach Parade, Toukley
The flood study investigated the flood behaviour and provides the technical foundation of the floodplain risk management study and plan.