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TBM: 2 of 27

At Herrenknecht’s Schwanau plant, the 20,000th cutting roller for use in a TBM was recently overhauled
INFRASTRUCTURE

Herrenknecht's 20,000th refurbished cutting roller

Key TBM components continue to be refinished by Herrrenknecht at its Schwanau plant

29 January 2026

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

HS2’s Chiltern tunnel north porous portal
INFRASTRUCTURE

HS2 completes civil engineering works on longest tunnel project

Important civil engineering milestone reached on UK’s new high-speed railway

21 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

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

Working on Southern Water’s Southampton Link Main, the TBM Mary Anning has broken through on its drive under the M3 motorway
UTILITIES

Breakthrough on Southern Water's M3 tunnel

Water company breaks through on tunnel under UK motorway while traffic continues overhead

27 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

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