Tunnelling at Forrestfield; the site that hosts the infrastructure vital to tunnel boring machine (TBM) operations, began in August (TBM Grace) and October (TBM Sandy) 2017. The site is operating 24 hours a day to support tunnelling activities, including processing excavated soil and treating water for reuse in the tunnelling process.
Work on the station building is progressing steadily. In the southern section of the concourse building, window frames, cable trays and dry walls have been installed. Dry wall installation has commenced within the northern section of the building.
Between concourse and platforms levels installation of the escalators was completed mid-year and the escalators will remain wrapped for protection from weather until they are commissioned once the station opens.
Also installed were the 31 steps-high public staircase and two 10.5m-high passenger lift shafts.
Over at the portal building, the top-level steel structure has recently been craned into place, in preparation for the roof sheeting and external cladding installation mid-September. In October, work will begin on the extensive services fit-out. Inside the building shaft itself, the steel staircase has now been installed.
At the stowage building the heat ventilation and air conditioning ducts have now been installed, as have the cable trays.