TBM Grace has now tunnelled more than 5.6km and installed more than 3300 rings, on her journey to Bayswater. Grace is now tunnelling in Ascot - underneath the Tonkin Highway road reserve and is expected to reach the Swan River in November.

Meanwhile, TBM Sandy has tunnelled more than 4.8km and installed more than 2800 rings.

With tunnelling now finalised between Forrestfield and Redcliffe stations, a new chapter has opened for the project. A tunnel fit-out has recently commenced with the construction of the first section of the infill base slab. With an extra-long drainage pipe and close to 500 m3 of concrete laid, almost a kilometre of the slab has now been built.

Click here for the September project update, here and au/34 for the tunnelbuilder archive.  Visit https://www.forrestfieldairportlink.wa.gov.au/. 37/19.