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TBM tunnelling complete on West Gate Tunnel

TBM Vida completing works on the Westgate Tunnel Project.

Tunnel boring is now complete on the West Gate Tunnel Project in Victoria.

When complete, the West Gate Tunnel Project will deliver an alternative to the West Gate Bridge, provide a second river crossing, and remove more than 9000 trucks from residential streets. This is expected to also make journeys safer and more reliable with travel times between Melbourne’s west and the city slashed by up to 20 minutes.

There will also be 14 kilometres of new and upgraded walking and cycling paths, and close to nine hectares of new parks and wetlands.

Tunnel Boring Machine (TBM) Bella has broken through in South Kingsville – completing a four-kilometre journey from the west side of the Maribyrnong River under Yarraville to just east of Millers Road near the West Gate Freeway.


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Over the past 15 months, TBM Bella has operated 24/7, excavating soil while installing works are conducted on more than 15,000 individual concrete segments to create the tunnel walls. The significant milestone comes after TBM Vida completed her journey, marking the largest tunnel breakthrough to occur in the southern hemisphere.

Minister for Transport and Infrastructure Jacinta Allan congratulated the project team on the milestone.

“This is a significant breakthrough, completing one of the most challenging parts of the West Gate Tunnel Project – in just a few years’ time, thousands of Victorians will travel through this tunnel each day, transforming Melbourne’s west,” Allan said.

Works will continue on building the road deck and installing electrical, lighting and safety systems to prepare both tunnels for completion in 2025.

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