Major Contract

Sydney Metro – Western Sydney Airport – Station Boxes and Tunnelling

Under Delivery
Sydney Metro – Western Sydney Airport – Station Boxes and Tunnelling

Formerly known as Sydney Metro Greater West, the Western Sydney Airport Line will see a new metro rail line run from St Marys on the existing T1 heavy rail line to the Western Sydney Aerotropolis near Bringelly, via Western Sydney Airport (WSA).

The Station Boxes and Tunnelling (SBT) Works for Sydney Metro – Western Sydney Airport project will involve the construction of two sections of twin tunnels between St Marys and Orchard Hills stations, and between the Western Sydney Airport Terminal and Aerotropolis stations. The tunnels are a total combined length of 9.8 kilometres, and include associated portal dive structures.

The line alignment includes stations to be located at:

  • St Marys
  • Orchard Hills
  • Luddenham
  • Airport Business Park
  • Airport Terminal, and
  • Western Sydney Aerotropolis.

The SBT Works will include station box excavations  and civil works with temporary ground support at St Marys, Orchard Hills, Western Sydney Airport Terminal, Western Sydney Aerotropolis and the construction of a temporary precast concrete factory.

Key Dates

Sep 2020 EOIs Open
Dec 2021 Contract Award
Jan 2023 Expected Construction Commencement
Dec 2024 Expected Construction Completion


Procuring Agency: Sydney Metro
Shortlist: The three shortlisted bidders are: - ACCIONA Construction Australia - John Holland Gamuda Joint Venture - CPB Contractors Ghella Joint Venture
Successful Tenderer: CPB Contractors Ghella Joint Venture
Procurement note:

The procurement is to be undertaken through a two stage process, with work to be awarded as Design and Construct contract.


Jun 2020 A scoping report was released, to supports the application to the NSW Minister for Planning and Public Spaces seeking the Secretary’s Environmental Assessment Requirements for the Environmental Impact Statement for the Western Sydney Airport line.
Sep 2020 The NSW Government invited registrations to begin the procurement for Station Boxes and Tunnelling works, with EOIs opened to the registrants from 18 September, closing on 30 October 2020. Separately, the NSW and Federal Governments announced the location of the six stations on the Western Sydney Airport line.
Oct 2020 The Environmental Impact Statement (EIS) for Western Sydney Airport Line was opened for public consultation, closing on 2 December 2020.
Mar 2021 The NSW Government shortlisted three consortia for the SBT component of the Project: Bouygues Construction Australia, a John Holland Gamuda Joint Venture, and Acciona Construction Australia. The NSW Government also announced that the contract is expected to be awarded by the end of 2021.
May 2021 Bouygues Construction Australia withdrew from the bidding process. They were replaced by a CPB Contractors Ghella Joint Venture on the tenderer shortlist.
May 2021 Sydney Metro invited Expressions of Interest for Independent Certifier Services for the package, closing on 25 June.
Jul 2021 The NSW Government granted planning approval for the Sydney Metro - Western Sydney Airport Line.
Dec 2021 Sydney Metro awarded the contract to a Joint Venture between CPB Contractors and Ghella. The announcement included updated project timings.
Apr 2022 The Pre-election Economic and Fiscal Outlook (PEFO) confirmed the provision of an indemnity for the integration of the Sydney Metro – Western Sydney Airport line with Western Sydney Airport.
Jun 2022 Construction Commenced on the project
Procurement approach
Traditional Procurement |
New South Wales | National |
Tender notices
Project pages
Western Sydney Airport