Flood Study adopted

At a meeting on 27 August 2019 Council adopted the Ingleside, Elanora and Warriewood Overland Flow Flood Study (May 2019) and resolved to update the Planning Certificates for affected properties.


Northern Beaches Council is responsible for the identification of flood prone land in the local government area. As part of this process, we’ve prepared the Draft Ingleside, Elanora and Warriewood Overland Flow Flood Study.

This project reviews and defines the existing and future flood behaviour in the study area. It considers current ground conditions in the catchment and the potential impacts of climate change. It uses the most up to date information and modelling techniques to determine overland flooding in the catchment.

The study area is located completely within the Narrabeen Lagoon catchment, and includes parts of Ingleside, Elanora Heights, Warriewood and North Narrabeen. It covers only the upper part of the northern catchment for Narrabeen Lagoon, i.e. the area affected by overland flow flooding but not by flooding from Narrabeen Lagoon.

Overland flow flooding is caused by intense rainfall events, which result in flow paths forming on sloped areas and floodwater pooling in low-lying flatter areas.

The results of the study will update the flood information currently used by Council for planning. Overall, there is a slight reduction in the number of properties identified as flood affected in the catchment.Council is seeking your input on the draft study.

How to get involved (Comments closed Mon 1 April 2019)

The draft Ingleside, Elanora and Warriewood Overland Flow Flood Study is on exhibition for public comment.

View the Draft Ingleside Elanora Warriewood Overland Flow Flood Study

View the Draft Ingleside Elanora Warriewood Overland Flow Flood Study - Appendices

Information sessions

Learn what the draft study means for you. Book a 15 minute, one-on-one, information session with a flooding specialist.

Sessions will be held in the Angophora Room at the Nelson Heather Centre on the following days:

  • Mon 11 Mar, 3 - 6pm
  • Mon 18 Mar, 1 - 4pm
  • Tue 19 Mar, 1 - 4pm
  • Sat 23 Mar, 1 - 4pm

Bookings are essential.

Contact Valerie Tulk on 9942 2915 or email floodplain@northernbeaches.nsw.gov.au

Having your say

  • Online
  • In writing to the CEO, Northern Beaches Council, PO Box 82, Manly NSW 1655, marked 'Submission - draft Ingleside, Elanora and Warriewood Overland Flow Flood Study'
  • By email - council@northernbeaches.nsw.gov.au

Following completion of the public exhibition, the study will be updated based on community feedback and presented to Council for adoption.

This will include a description of community consultation activities, topics and issues raised during the exhibition period as well as how they were addressed.

Comments close Monday 1 April 2019.

Project Lifecycle

  • Timeline item 1 - complete

    2 Mar '19 - Public exhibition and submission period commences

  • Timeline item 2 - complete

    1 Apr '19 - Submission period closes

  • Timeline item 3 - complete

    Apr - May '19 - Review submissions and prepare report

  • Timeline item 4 - complete

    Jun '19 - Report to Council for adoption

Valerie Tulk

Engineer - Floodplain Specialist, Northern Beaches Council

1300 434 434 or Email:

Duncan Howley

Team Leader - Floodplain Planning and Response

1300 434 434 or Email: