TBM Joan arrives at State Library Station
Posted: 22 Dec 2020
Tunnel boring machine (TBM) Joan has completed the one-kilometre stretch between the Metro Tunnel station sites at Parkville and the State Library.
TBM Joan launched from Parkville in October, and its 20 December breakthrough will be followed shortly by TBM Meg, which is digging a parallel tunnel.
The TBMs will be transferred through the station box and then relaunched for the final leg of tunnelling, connecting State Library Station with Town Hall Station.
The project’s two other TBMs, Alice and Millie, are also digging twin tunnels towards Town Hall Station from the Anzac Station site in the west.