Two of the Metro Tunnel’s tunnel boring machines (TBMs) are now crossing underneath Melbourne’s Yarra River.
TBM Millie is now 12 m below the bed of the river on its way to the new Town Hall Station, while TBM Alice is currently digging a parallel tunnel from the Anzac Station site.
Project operators estimate it will take approximately two weeks to cross under the Yarra, after which both TBMs will travel another 300 m under Swanston street to complete the final section of tunnelling.
Only 15 per cent of tunnelling work remains on the Metro Tunnel’s twin 9 km, 6.3 m high tunnels.
For more information visit the Metro Tunnel website.
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