Tunnelling at Forrestfield, the site that hosts the infrastructure vital to TBM operations, began in August (TBM Grace) and October (TBM Sandy) 2017. The site operates 24 hours a day to support tunnelling activities, including processing excavated soil and treating water for reuse in the tunnelling process.
Construction of station infrastructure is progressing well across all areas of the Forrestfield site.
At the centre of the site, significant progress has been made with the completion of the suspended section of the concourse level. This was followed by the installation of the first set of escalators, connecting the concourse and platform level. The escalators will remain wrapped for protection from weather until they are commissioned just prior to the station opening in 2021.
Construction of the steel structure for the station's lower roof has also commenced, with the main roof expected to be installed in the second half of this year. This has allowed brick work and installation of door frames to commence.
Civil works for the station’s stowage building and the 130m-long stowage platform, located at the southern end of the site, was recently completed. Fit-out of the stowage building will commence later this year. The stowage area is the place where trains will be maintained whilst not in use.
At the portal end of the site, and just above the tunnel entry/exit, brickwork for the ground to mezzanine level of the multi-storey portal building has commenced. The portal building’s structural framework will be completed over the coming months, allowing for works on the building's mechanical, electrical and plumbing fit-out to commence in September.