Tunneling for Sydney City & Southwest Metro is about 50% completed, after another mega boring machine broke through into the new Crows Nest Station site.
Four weeks after Tunnel Boring Machine Wendy arrived, TBM Mabel’s cutterhead broke through a wall of rock at the new Crows Nest Station site after tunnelling about 3 km from Chatswood.
Since launching in February this year, TBM Mabel has excavated about 290,000 tonnes of sandstone and shale, which is correspondent to fill more than 45 swimming pools.
Mabel will spend a few weeks undergoing maintenance before being re-launched at Crows Nest and tunnelling towards the next future Sydney Metro station at North Sydney.
TBM Mabel and TBM Wendy are building 6.2 kilometres of tunnel which will link the recently opened North West Metro at Chatswood to the harbour’s edge at Blues Point.
The borer is named after Mabel Newill, a matron at Royal Prince Alfred Hospital (RPAH), who introduced sanitisation techniques to help stop the spread of typhoid in Sydney in the early 1900s.
Sydney Metro City & Southwest will have new stations at Crows Nest, Victoria Cross, Barangaroo, Martin Place, Pitt Street and Waterloo along with new underground platforms at Central Station. Sydenham, Central and Martin Place are designed as transfer stations. The project is expected to be completed in 2024.