WestConnex M4-M5 Link 3A, Main Tunnel Works Project

Arcadis is the sole provider of Independent Certifier services to the WestConnex M4-M5 Link 3A, Mainline Tunnel Works Project.

The Main Tunnel Works scope includes:

• 7.5-kilometre twin tunnels, each four-lanes wide linking Haberfield to St Peters
• Ramps between the main tunnels and the surface interchange at St Peters
• Tunnel stubs to connect the main tunnels to the Rozelle Interchange and proposed Western Harbour Tunnel (and Beaches Link)
• Ramps between the main tunnels and the surface connection at Wattle Street
• A ventilation facility at St Peters
• Integration with the ventilation facility at Haberfield

The Independent Certifier’s role is to ensure the technical requirements, contractual deliverables, legislative and statutory requirements and quality of workmanship are completed by the contractor in accordance with the Project Deed and other project documents.