Although it’s not a race, TBM Sandy is catching up to TBM Grace. Sandy has now reached the 5.5-kilometre mark of her 8km journey toward Bayswater. She’s currently tunnelling underneath the Tonkin Highway road reserve in Ascot and has installed more than 3200 rings.

Late last month the project team reached another milestone with a total of 4.9 million hours worked since construction began 35 months ago. By comparison, that is equivalent to one person working non-stop for almost 560 years!