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Shaping the ongoing entrance management

We are developing a strategy for the ongoing management of Narrabeen Lagoon entrance.

As a first step, we have prepared an options paper that outlines the way we currently manage the entrance and long-term options being considered.

We would like to get your thoughts and suggestions on the potential ways the entrance could be managed in the future.

As part of this project, we are investigating all aspects of entrance management, including emergency response arrangements, clearance work improvements and the long-term costs and sustainability of entrance-specific options.

Scroll down to learn more, book a chat with the project team and have your say.

Understanding Narrabeen Lagoon

Narrabeen Lagoon is one of the Northern Beaches' greatest natural and recreational assets. However, it is also prone to flooding and Council has been managing the entrance of the lagoon to reduce the risk of flooding for close to half a century.

We encourage you to watch the below video to learn more about Narrabeen Lagoon entrance and how Council currently manages this complex issue.

We want to thank Louise Collier and Ian Turner who feature in the video.

Have your say today by:

  • completing the submission form below
  • emailing us at council@northernbeaches.nsw.gov.au
  • writing to us marked 'Narrabeen Lagoon Entrance Management Strategy', Northern Beaches Council, PO Box 82 Manly, NSW 1655.

Your feedback will be considered in the preparation of the draft strategy.

Please note that we are trialing a new online format to present the options paper. It allows you to view the information alongside various graphics. If you are are having trouble with the online document, please contact us on 1300 434 434 (during business hours).

You can also check out further information about the project, lagoon and flooding in the frequently asked questions section below.

Speak with the project team

We appreciate that there is a lot of technical information contained in the options paper and we want to support you as best we can during this consultation. If you would like to speak directly with Council staff, we are offering two ways of doing so:

1) Face to face meetings will be held at the Narrabeen Coastal Environment Centre. Due to the evolving Covid-19 situation, bookings are essential and 25 minute timeslots will be provided for one-on-one meetings on the following dates:

  • Wednesday 10 March 4-6pm
  • Saturday 20 March 9am-12pm

Book a face to face meeting

2) If you prefer to speak with a project team member over the phone, you can book a telephone appointment instead. Phone bookings are available for the following dates:

  • Tuesday 9 March 9am-12pm

Book a telephone appointment

If you are having trouble with the online booking system, please contact us on 1300 434 434 (during business hours).

In 2019, Council adopted the Narrabeen Lagoon Floodplain Risk Management Study and Plan. This study evaluated a number of floodplain risk management options across the Narrabeen Lagoon catchment. With respect to the lagoon waterbody, it found that minimising the volume of sand within the lagoon entrance is still the most effective way of reducing flood risk.

In recent years, a widening of North Narrabeen Beach and an increase in adjacent sand volumes has led to entrance clearance operations needing to be completed more frequently.

As a result, a key recommendation of the Floodplain Risk Management Study and Plan was to prepare an Entrance Management Strategy for Narrabeen Lagoon.

In developing the Narrabeen Lagoon Entrance Management Strategy, we will review improvements to current management practices across the short-term and medium-term time horizons, as well as assess alternate management options across the long-term horizon.

For the purposes of the options paper, the short-term time horizon applies to mechanical breakout and emergency procedures, the medium-term time horizon applies to planned periodic clearance works, and the long-term time horizon applies to management options involving the installation of a more permanent structure.

Do you have any feedback on the current management of Narrabeen Lagoon entrance during wet weather events? What other practices would you like to see Council adopt?

What are your thoughts on the periodic clearance works in Narrabeen Lagoon entrance? Do you have any feedback on how to improve the process or alternatives Council should consider?

How do you want Narrabeen Lagoon entrance managed long-term? What are the key considerations in determining which option to select?

Submission form


  • Timeline item 1 - active

    Feb-Mar 2021 Consultation on options paper

  • Timeline item 2 - incomplete

    Mar-Apr 2021 Review of community feedback on options

  • Timeline item 3 - incomplete

    Apr-May 2021 Development of the draft strategy

  • Timeline item 4 - incomplete

    Jun-Jul 2021 Public exhibition of the draft strategy

Have an enquiry?

Name Valerie Tulk - Floodplain Planning & Response Team
Phone 1300 434 434 (during business hours)
Email council@northernbeaches.nsw.gov.au
In writing

'Narrabeen Lagoon Entrance Management Strategy' Northern Beaches Council, PO Box 82, Manly NSW 1655.