Construction of the future State Library Station has entered an exciting new phase with the first tunnel breakthrough occurring under Swanston Street, near Franklin Street.
It’s a huge milestone for the Metro Tunnel Project and signifies months of round-the-clock excavation by three roadheaders before they met 30 metres underground.
The three machines have been digging out station caverns and passenger connections for State Library Station.
Each roadheader weighs 118 tonnes and is 15 metres long. They are lowered underground in separate pieces, before being re-assembled at the bottom of an access shaft ahead of mining.
To read more about State Library Station and our roadheaders, visit the Metro Tunnel website.