Western Sydney Airport has announced sandstone from Sydney Metro tunnels will be reused to help build the new Western Sydney International (Nancy-Bird Walton) Airport, the company said.
More than 500,000 tonnes of sandstone will be transported from Metro tunnelling sites at Chatswood and Marrickville to the Western Sydney International site.
The sandstone is coming from tunnel boring machines excavating the new twin railway tunnels between Chatswood and Marrickville, which are already 50 percent complete.
Sydney Metro aims to reuse 100 per cent of crushed rock during excavation of the 15.5-kilometre twin tunnels between Chatswood and Marrickville.
Western Sydney International is on track to open for its first passengers in 2026.