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Mona Vale/Bayview
Watercourse
Where does it flow to?
Pittwater Estuary at Winnererremy Bay.
When has it flooded in the past?
1977, 1987, 1989, 1994, 1998
How many properties are flood affected?
Approximately 390, with about 70 properties (both residential and commercial) flooded above floor level in a 1%AEP flood event.
What are the flood risks?
- Flooding can occur from flash flooding from the creeks after heavy rainfall in the catchment or from waves and king tides from the Pittwater Estuary during a severe ocean storm or a combination of both.
- Flash flooding means that flooding will occur quickly and there will be little opportunity for warning or assistance before or during a flood.
What is Council doing? - Flood Mitigation Works — Improvements to stormwater drainage around Old Samuel Street and Samuel Street were completed in the early 1990s following the floods of 1987 and 1989.
- Mona Vale / Bayview Flood Study (DHI Water and Environment, 2002) was adopted by Council in September 2002.
- Flood Planning Levels for all properties shown on the Flood Hazard Map were adopted by Council in July 2005.
- Mona Vale / Bayview Floodplain Risk Management Study and Plan is in preparation with the Draft Final Report currently subject to internal review. Community Information Sheet No.1 (May 2007) provides an introduction to the project.
What can I do?
- Being prepared for a flood is the best way to reduce the risks. The State Emergency Service (SES) is the lead response agency for floods, storms and tsunami across NSW. See the SES website for ways you can prepare for a flood.
- Council will post information on the website and advertise in the local media whenever new information becomes available
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