Four tunnel boring machines (TMBs) are now leaving Sydney after finishing tunnelling under the city, delivering 30 kilometres of twin metro railway tunnels.
Tunnel Boring Machine (TBM) Grace has broken through at the Bayswater dive structure today making the end of an 8 kilometre journey.
Four out of five tunnel boring machines are now finished work for the Sydney Metro, with tunneling work 97 per cent complete.
After months of assembly and commissioning the Metro Tunnel Project's second tunnel boring machine (TBM) Meg has been launched.
Tunnel boring machine (TBM) Kathleen has dug more than 5550 metres of tunnelling under the Sydney Harbour.