M6 Stage 1 – C3 Cut and Cover


This project includes Stage One comprises continuous twin tunnels connecting the New M5 at Arncliffe to President Avenue at Kogarah. Key components include:

  • North- and South-bound tunnels around 4 km in length
  • A tunnel portal at Brighton-Le-Sands connecting to entry and exit ramps at a widened President Avenue
  • Stub tunnels for the proposed connection to a future southern stage of the M6 Extension
  • Upgrade of the President Avenue and Princes Highway intersection
  • Secondary infrastructure and operational facilities
  • Pedestrian and cycle pathways.

Abyss Construction are currently completing the following works for three levels of props and walers for the cut and cover structure:

  • Placement of blinding for cut and cover FRP works
  • Installation of reinforcement to prop, waler beams and capping beam elements.
  • Installation of formwork and concrete to prop, waler beams and capping beam structure.

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Project information

Head Contractor:

CPB Contractors, Ghella & UGL Engineering joint venture (‘CGU JV’)


November 2022 – Portion 1
October 2023 – Portion 2

Project value:

$ 3.1 Billion

Package value:

$ 3.1 Million


Key People For This Project:

Pa O’Sullivan
John Gormley
Patricia Kesuma


Road and rail

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