Tracking our TBMs

You can check out the progress of our two Tunnel Boring Machines – Else and Merle – on the map below, as they make their way from Woolloongabba to Albert Street, before continuing to Roma Street and finally emerging at the project’s northern portal at Normanby.

TBM Else has now broken through at the Northern Portal and TBM Merle is not far behind.

Two roadheaders, that tunnelled south from Woolloongabba, have completed their excavation having broken through into the Boggo Road station cavern.

You can find out more about all things tunnelling on our ‘Guide to tunelling page’.

TBM Else

4,098 metres


TBM Merle

3,801 metres


Roadheader One

865 metres


Roadheader Two

870 metres


Cross passages

Cross passages have not been added to the tracker above but information about them and their locations can be viewed here.

If you need to talk to a member of our team about cross passage construction, you can find our contact details here.

Learn more

Our TBMs are named after two awesome women who were groundbreakers in their own right, here in Queensland. Our roadheaders don’t have names but are equally awesome! You can read more by clicking the links below.

Find out more about Else Shepherd.

Find our more about Merle Thornton.

Find out more about our roadheaders.