Narrabeen Lagoon Entrance

Narrabeen Lagoon Entrance Clearance and Collaroy-Narrabeen Beach Sand Replenishment

Warringah and Pittwater Councils most recently removed sand from Narrabeen Lagoon entrance in 2011.

The entrance clearance program reduces the risk of flooding in low lying areas surrounding the lagoon and increases tidal flushing; improving both biodiversity and water quality.

The sand excavated from the entrance is spread at selected locations along Collaroy-Narrabeen Beach as part of Warringah Council’s ongoing sand replenishment program.

Approximately 35,000 cubic metres of sand was moved in the 2011 operation.

The clearance operation is a maintenance activity that takes place every few years when the entrance becomes clogged with marine sand. Ten major clearance operations have taken place at the entrance since 1975.

The Narrabeen Lagoon Entrance Clearance works are jointly funded by the NSW Office of Environment & Heritage (two thirds), Warringah Council and Pittwater Council (one sixth each).

A Review of Environmental Factors was completed in February 2011 as part of the planning stage for the 2011 entrance clearance operation.

• Community Guide to 2011 Narrabeen Lagoon Entrance Clearance and Collaroy-Narrabeen Beach Sand Replenishment (PDF, 254KB)
• Post Completion Report for the 2011 Narrabeen Lagoon Entrance Clearance Operation (PDF, 15.8MB) 

Narrabeen LagoonWatch

The LagoonWatch computer system provides real time information on tides, water levels, offshore wave height, rainfall and stream-flow in addition to providing a predictive model for future entrance and flood conditions.

For enquiries about the management of the entrance of Narrabeen Lagoon contact:

Valerie Tulk or Daylan Cameron
Natural Environment Unit
Ph 9942 2111