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Narrabeen Lagoon
Watercourse
Where does it flow to?
Pacific Ocean at North Narrabeen Beach
When has it flooded in the past?
1889, 1911, 1931, 1942, 1956, 1958, 1961, 1974, 1975, 1977, 1978, 1986, 1987, 1998, 2003
How many properties are flood affected?
Approximately 580.
What are the flood risks?
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Flooding in Narrabeen Lagoon can occur after heavy rain in the catchment or from waves and king tides from the ocean during a severe ocean storm or a combination of both.
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Flood waters could rise quite quickly and there may be little opportunity for warning or assistance before or during a flood. Depending on entrance conditions and ocean levels, flood waters could remain elevated for many hours.
What is Council doing?
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In January 2011, Pittwater and Warringah Councils endorsed respectively the Narrabeen Lagoon Floodplain Risk Management Working Group and Narrabeen Lagoon Floodplain Risk Management Community Committee to provide a greater focus on completing flood risk management tasks. The group is jointly managed by the two councils, alternately on an annual basis, to meet quarterly.
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Narrabeen Lagoon Flood Study (NSW Public Works, 1990) was adopted by Warringah Council in July 1991, prior to the proclamation of Pittwater Council.
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Narrabeen Lagoon Floodplain Management Study (Mitchell McCotter, 1992) adopted by Pittwater Council in December 1992
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Narrabeen Lagoon Floodplain Management Plan - Volume 1 Pittwater (SMEC, 2002) was adopted by Pittwater Council in December 2002
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Narrabeen Lagoon Floodplain Management Plan - Volume 1 Warringah (SMEC, 2002) was adopted by Warringah Council in February 2003
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Narrabeen Lagoon Floodplain Risk Management Plan - Volume 2 Review (SMEC, 2002) was adopted by Pittwater Council in December 2002.
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Narrabeen Lagoon Entrance Management Policy (2002) was adopted by Warringah Council.
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Flood Planning Levels for all properties shown on the Flood Hazard Map were adopted by Council in July 2005.
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Narrabeen Lagoon Flood Study Update is in the early stages of preparation.
What can I do?
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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.
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Council will post information on the website and advertise in the local media whenever new information becomes available.
Latest News
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Warringah Council in partnership with Pittwater Council is carrying out a flood study to define the existing flood behaviour in the Narrabeen Lagoon catchment. This study will establish the basis for subsequent floodplain management activities and is being prepared to meet the objectives of the NSW State Government's Flood Policy. The study will consider the potential flooding impacts of climate change in line with current State policy and best practice. For more information on this project please click the following link and view the community newsletter and questionnair under related documents below. |
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Narrabeen Lagoon Entrance Clearance Works
Entrance clearance is required to reduce the risk of flooding in the Narrabeen Lagoon catchment. Approximately 40,000 cubic metres of sand will be excavated from the entrance of the lagoon between September and December 2011. Excavated sand will be spread on Collaroy-Narrabeen Beach as part of ongoing beach replenishment operations. In cooperation with Pittwater Council, Warringah Council is undertaking the entrance clearance works. Cardno has been engaged as the Project Superintendent and the project is jointly funded by the NSW Office of Environment and Heritage, Warringah Council and Pittwater Council. For more information on the project please visit Warringah Council's website.
For further details please contact:
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Warringah Council - Valerie Tulk, 9942 2111
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Pittwater Council - Paul Hardie, 9970 1111
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Cardno - Chris Holloway, 9496 7700
A Narrabeen Entrance Clearance Poster and Community Guide have been developed, please click on the below links to view these documents.
Updated: 13 Sep 2011