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TBM breakthrough on Western Sydney Airport station

TBM breakthrough on Western Sydney Airport station

Tunnel Boring Machine (TBM) Peggy has completed the first leg of its 5.5 kilometre journey on the Sydney Metro – Western Sydney Airport, Terminal Station project.

The 1066 tonne TBM has been working at an average speed of 120 metres per week to build the fully lined 1.26-kilometre tunnel from the Airport Business Park, excavating around 112,000 tonnes of rock.

The machine will now traverse the station box before being relaunched, to tunnel under the future Western Sydney International (Nancy-Bird Walton) Airport, with the TBM expected to arrive at the Aerotropolis metro station site in 2024.

A total of four TBMs will build the 9.8-kilometre-long twin tunnels for the Sydney Metro – Western Sydney Airport railway line between St Marys and the Aerotropolis.

A joint venture between CPB Contractors and Ghella was awarded the $1.8 billion Station Boxes and Tunnelling contract in 2021 to deliver 9.8 kilometres of twin metro tunnels, five station boxes and two services facilities shafts for the Sydney Metro – Western Sydney Airport project.


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Federal Infrastructure, Transport, Regional Development and Local Government Minister Catherine King said the project would create greater connections for locals and tourists.

“The spectacular arrival of TBM Peggy marks the fantastic progress underway on this vital 23-kilometre transport link, which will not only benefit Greater Western Sydney residents, but for those visiting from around the globe,” King said.

“We are thrilled to be shaping the future of this vibrant and growing region with reliable and fully accessible metro services, ready for when planes start taking off at the new Western Sydney International (Nancy-Bird Walton) Airport.”

The line will be operational when Western Sydney International (Nancy-Bird Walton) Airport opens for passenger services in 2026, with an expected travel time of 15 minutes from St Marys metro station to the Airport Terminal Station and a further five minutes to the Aerotropolis Station.

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