SYDNEY Metro has awarded a $A 1.8bn contract to the CPB Contractors and Ghella Joint Venture to excavate 9.8km of dual-bore tunnel as part of the Western Sydney Airport project.

The contract is split in two sections: the 4.3-kilometre northern tunnels run from St Marys to Orchard Hills; and the 5.5-kilometre southern section of tunnels runs between the Airport Business Park and the Aerotropolis Station.

The first of four tunnel boring machines will be in the ground by early 2023 under the terms of the contract. Tunnelling is scheduled for completion by late 2024 when fit out will commence.

When completed the driverless 23km Sydney Metro – Western Sydney Airport metro line will link St Marys to the centre of the new Aerotropolis via the new Western Sydney International (Nancy-Bird Walton) Airport with six stations.

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