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.
Forrestfield has taken its first delivery of rail, with almost 9000 linear metres unloaded to date. Sections of rail will be welded together before installation commences in the first half of next year.
Following the completion of the station’s roof steel structure, installation of red roof sheeting is now underway. Adding a bit of colour to the scene and blending in with the earthy tones of the nearby Darling Ranges, the distinctive station roof will be visible from surrounding areas and clearly identify the entry point to Forrestfield Station.
Backfilling of the recently closed section of the station retaining wall has commenced.
At the portal building, located above the tunnel entry and exit points, external cladding has been fixed to the steel framework, which finalises construction of the building superstructure. Fit-out with heating, ventilation and air-conditioning services is ongoing.
At the southern end of the site, the stowage building is about 85 per cent complete, with only internal fit-out remaining.
New in 2020 is the construction of the traction power substation, located along Maida Vale Road. The traction power system supplies electric power to the suburban railway network, and the Forrestfield substation will house a single traction transformer. From here, electricity will be fed to the overhead wiring system.
As part of rectification works following an incident at Cross Passage Dundas in September 2018, traffic management is in place for a short section of Dundas Road north of Maida Vale Road and south or Sorensen Road. Access remains open to north- and south-bound traffic and every effort has been made to minimise disruption to motorists. Traffic management will likely be in place until late-February 2020.