The first of four tunnel boring machines (TBM) has completed its journey on the Sydney Metro Northwest project.
After digging underground for 10 months, TBM Isabelle has travelled almost 6km from Cherrybrook, New South Wales. The machine’s breakthrough at Epping means the tunnelling phase of the project is now more than 75% complete.
On average, 120m of tunnel has been bored every week by the TBMs. The tunnelling scheme will generate 2.8Mt of crushed rock.
When complete, the Sydney Metro Northwest project will deliver twin 15km railway tunnels between Bella Vista and Epping.
Tunnelling works are expected to be complete in 2017 and the network is scheduled to open in 2019.