The Dame Whina Cooper TBM is currently constructing the City Rail Link's second bored tunnel. Track its progress here.

Distance to date

1130 metres

Rings installed


Earth removed

75,820 tonnes

TBM Progress
TBM Progress (3D)

The Dame Whina Cooper tunnel boring machine (TBM) broke through into Karanga a Hape Station's (Karangahape) Mercury Lane site - a whopping 32-metres-below ground level - on Friday 15 July 2022. You can watch the breakthrough moment in the video below.