Western Harbour Tunnel

Under Procurement
Western Harbour Tunnel

The Western Harbour Tunnel will be the second road tunnel under Sydney Harbour. It is aimed at reducing congestion on the existing harbour bridge and tunnel, as well as the Eastern Distributor and Anzac Bridge.

The tunnel will connect the WestConnex Rozelle Interchange with the Warringah Freeway in North Sydney.

The future Northern Beaches Link Tunnel will also connect with the Warringah Freeway, allowing motorists to travel on a single roadway from the Northern Beaches, through the Western Harbour Tunnel and into the WestConnex roadways system.

Key components of the Western Harbour Tunnel will include:

  • twin tunnels, each with three lanes and approximately 6.5 kilometres long
  • tunnels to be mostly driven, with the crossing of Sydney Harbour between Birchgrove and Waverton being immersed tubes
  • tunnel-to-tunnel connection to the M4-M5 Link near Rozelle Interchange
  • future connection options for Beaches Link and Gore Hill Freeway
  • surface connections to City West Link at Rozelle and to Warringah Freeway, Falcon Street and Berry Street in North Sydney, and
  • ancillary infrastructure to enable ongoing operation of the tunnel.


Key Dates

2022 Expected Construction Commencement
Apr 2026 Expected Construction Completion

Funding contributions

NSW Government


Shortlist: Bechtel, Laing O'Rourke, and the Harbour West Partners Consortium comprising Macquarie Capital, Jacobs and RPS.


Jan 2014 The Project was identified in Infrastructure NSW’s 2014 State Infrastructure Strategy
Jan 2016 The NSW Budget allocated funding to commence planning
2017 $77 million was committed towards geotechnical investigations
Mar 2017 The preferred route was announced and a market sounding process commenced
Apr 2017 Coffey and AECOM were engaged to conduct geotechnical investigations along the route, including 235 boreholes.
Nov 2017 A State Significant Infrastructure Application (SSIA) was lodged to identify topics for a future Environmental Impact Statement (EIS)
Dec 2017 Secretary's Environmental Assessmenet Requirements issued for preparation of the Environmental Impact Statement
Jul 2018 The NSW Government announced that the Western Harbour Tunnel would be tolled and indicating the Tunnel contract would include the Warringah Freeway Upgrade.
Jan 2020 The Department of Planning, Industry and Environment placed the EIS for the project on public exhibition on 29 January 2020. The exhibition period will close on 12 March 2020.
Feb 2020 DPIE extended the public exhibition period of the EIS from 12 March to 30 March 2020.
Jul 2020 The NSW Government announced it will be seeking a Development Partner to assist with the procurement and delivery of the project, with an Expression of Interest for the Development Partner expected in August 2020.
Jul 2020 The NSW Government issued a Request for Proposals for the contamination drilling and testing works. Proponents were required to submit a Confidentiality Deed Poll to TfNSW by 16 July 2020.
Nov 2020 The 2020-21 NSW Budget allocated $356 million to the Western Harbour Tunnel and Warringah Freeway Upgrade for FY2020-21. The funding will be provided towards planning and preconstruction activities.
Mar 2021 The NSW Government opened Pre-Registrations for the Western Harbour Tunnel. Main works on the project will be split into Package One, which includes an immersed tube crossing and marine works, and Package Two, which includes driven tunnels and mechanical and electrical fitout works. Pre-Registrations close on 14 May.
May 2021 Infrastructure Australia added the project to the Infrastructure Priority List as a Priority Project.
Procurement approach
Unconfirmed |
New South Wales |
Infrastructure Australia status
Priority Project (medium-term, 5-10 years)