The Forrestfield construction site is divided by Dundas Road, near Maida Vale Road. To the west of Dundas Road, is the dive structure where the two tunnel boring machines (TBMs) began tunnelling in August and October 2017. The dive structure is 260m long and up to 22m wide.
To the east of Dundas Road is infrastructure vital to the operation of the TBMs. The site is now operating 24 hours a day to support tunnelling activities, including processing excavated soil and treating water for re-use in the tunnelling process.
Construction of the retaining wall for Forrestfield Station is progressing well. The wall will be up to 8.2m high and more than 100 counterforts are being installed to support the 18 tonne wall panels, as well as the backfilling required to raise the ground level at the station by 6m. Backfilling has begun and the ground level has been raised by 2.5m in some areas.
Meanwhile, excavation and service relocation for the stowage building is also continuing.
Works have also begun to realign Dundas Road, with the new road expected to open mid-year. While much of the work for the new road will be completed behind a fenced area with minimal impact on road users, there is some work to be done along Dundas Road to establish the two intersections. Construction of the traffic barrier adjacent to the tunnel portal is almost finished. Once the realignment is completed and open to traffic in mid-2018, the current Dundas Road will be closed south of Maida Vale Road and north of Imperial Street. View a map of the changes to Dundas Road.