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tunnel boring machine

The cutterhead for the TBM Mary being lowered into place, ready for work to begin on the Potomac River Tunnel Project
INFRASTRUCTURE

TBM build-up begins for Potomac River Tunnel bore

DC Water lowers TBM cutterhead underground, ready to begin boring the Potomac River Tunnel

23 January 2026

One of the TBMS used for the Sydney Metro West tunnels prior to its removal from the tunnels
INFRASTRUCTURE

Sydney Metro TBMs emerge at Westmead

With tunnelling work completed, strip down and removal of TBMs Betty and Dorothy begins

13 January 2026

TERRATEC has achieved key landmarks on Chennai Metro Phase II with the advancement of the TBM on Line 3 and the launch of another TBM on Corridor 5, reflecting strong collaboration with Tata Projects and CMRL
INFRASTRUCTURE

Terratec marks key tunnelling milestones on Chennai Metro Phase II

Terratec advances TBM on Chennai Metro Phase II and launches another TBM on Corridor 5

06 January 2026

An artist’s impression of the proposed Lower Thames Crossing Northern tunnel entrance
INFRASTRUCTURE

UK Government greenlights Lower Thames Crossing tunnelling machine

Search begins for a giant TBM to tunnel 60m below the Thames in the Southeast of England

04 December 2025

ACCIONA has completed factory acceptance testing for its second TBM, ready for it to begin work on the NSW Government’s Western Harbour Tunnel project in Sydney, Australia
INFRASTRUCTURE

TBMs set to break new ground on Western Harbour Tunnel

Factory acceptance testing completed on second TBM for Australian infrastructure project

28 November 2025

IDA is one of the two Herrenknecht TBMS to have broken through on Brenner Base Tunnel project
INFRASTRUCTURE

TBMs drive 83.4km through alpine rock

Two of eight Herrenknecht TBMs, "Ida" and "Lilia", breakthrough on Brenner Base Tunnel project

25 November 2025

In Sydney, Australia, Western Harbour Tunnel crews have completed construction of massive twin underground caverns that will facilitate the launch of twin TBMs at Birchgrove
INFRASTRUCTURE

TBM launch caverns completed in Sydney

Caverns completed and TBM assembly works begins for Western Harbour Tunnel

13 November 2025

Webuild’s excavation of the Rocchetta Tunnel is progressing at full speed, having dug the first 4km
INFRASTRUCTURE

Over half of Rocchetta Tunnel excavated

First 4km of the Rocchetta Tunnel on Naples-Bari high-speed rail line excavated by Webuild

13 November 2025

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