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Fehmarnbelt tunnel - Both portals near completion

Fehmarnbelt tunnel - Both portals near completion

The Danish entrance to the Fehmarnbelt tunnel with its 160-m long cut-and-cover tunnel at Rødbyhavn on Lolland is almost complete.  The transition between the motorway and the railway on ... More Information

Switzerland - Open Day on September 13, 2025 at the Ligerz/Gleresse Tunnel

Switzerland - Open Day on September 13, 2025 at the Ligerz/Gleresse Tunnel

On September 13, from 9:00 a.m. to 4:00 p.m., an open day will be held at the Ligerz/Gleresse tunnel, part of the track-doubling project between La Neuveville (BE) and Twann/Douanne (BE) in ... More Information

TBM excavation completed at Forch window in Italy

In mid-September 2025, TBM Barbara (85 m long and weighing 2,000 t) completed the excavation and lining—using 726 rings—of the Forch construction window (1.3 km), part of Lot 1 - ... More Information

Progress on the Ogliastrillo-Castelbuono section of the Palermo-Catania-Messina railway doubling project.

The TBM Margherita is advancing at an average speed of 11 m/day, at a depth of approximately 105 m, while excavating the odd tube of the Cefalù tunnel on the Ogliastrillo-Castelbuono section, ... More Information

Canada - Libby and Corkie will carve out the first two Ontario Line subway tunnels

Two new TBMs in the Metrolinx family have officially been named Libby and Corkie, following a naming contest launched in June 2025 — which saw more than 900 submissions and over 1,000 votes ... More Information

Arup Takes the Helm in Landmark UK Water Infrastructure Revamp

Securing Water Resilience for Over Two Million People - Global engineering and built environment consultancy Arup has been appointed by STRABAG UK to deliver comprehensive design services for the ... More Information

Italy/France - Mont Blanc Tunnel, vault renovation: the second test site

The second test site for the renovation of the Mont Blanc Tunnel vault will be carried out from 1 September to 12 December 2025 in two sections of the tunnel, upstream and downstream of one of the ... More Information

First breakthrough with TBM in a main tunnel in Austria for BBT

First breakthrough with TBM in a main tunnel in Austria for BBT

TBM Ida has completed the excavation of the 8.4 km H41 Sill Gorge-Pfons section of the Brenner Base Tunnel, reaching its destination in the municipality of Navis (Wipptal), near an existing ... More Information

Italy/Liguria - Services Conference on the final design for the doubling of the Genoa-Ventimiglia railway line: Finale Ligure – Andora section

On 8 September 2025 at 3 p.m, a Services Conference will be held for the purpose of examining the final design for the doubling of the Genoa-Ventimiglia railway line: Finale Ligure – Andora ... More Information

NYMTA Awards $1.97 Billion Contract for Second Avenue Subway Phase 2 Tunnelling Works

The New York Metropolitan Transportation Authority (NYMTA) has awarded a $1.972 billion contract to Connect Plus Partners—a joint venture of Halmar International and FCC Construction—to ... More Information

TERRATEC TBM commences excavation on Bangkok MRT Purple Line

TERRATEC TBM commences excavation on Bangkok MRT Purple Line

TERRATEC is pleased to announce that its Earth Pressure Balance Tunnel Boring Machine (EPBM), TERRATEC S114, has commenced excavation on Contract 3 of the MRT Purple Line (Tao Poon – Rat ... More Information

Heathrow’s Expansion Hinges on M25 Tunnel Engineering

The expansion of Heathrow Airport has once again brought the spotlight onto one of the most complex tunnelling proposals ever considered in the UK: the realignment of the M25 motorway through a ... More Information

Breakthrough for the Lower Olentangy Tunnel Project in USA

Breakthrough for the Lower Olentangy Tunnel Project in USA

The Herrenknecht TBM EPB named “The Mighty Quinn” arrived at its destination in early August after boring a total of 5.64km under the city of Columbus, Ohio, USA. For the Lower Olentangy ... More Information

The fourth Snowy 2.0 TBM shipped to Snowy Mountains

Snowy Hydro is now preparing for the arrival of its fourth TBM to join Snowy 2.0 – Australia’s largest renewable energy project.  The new TBM - 178-m length and 11.86 m diameter - ... More Information

Canada - Breaking ground on second Ontario Line tunnel launch shaft

Canada - Breaking ground on second Ontario Line tunnel launch shaft

Metrolinx is creating a second tunnel launch shaft near Gerrard Street and Carlaw Avenue which is now under construction. This will serve as the starting point for the second underground section of ... More Information

Veidekke Secures Final Tunnel Contract for Gothenburg’s West Link Project

Scandinavian construction powerhouse Veidekke ASA has officially been awarded the contract section of Gothenburg's ambitious West Link (Västlänken) rail project. Project Overview Scope: ... More Information

Central Romania: Cluj-Napoca Metro Project Moves into Underground Construction Phase

Work on Romania’s second metro network, in Cluj-Napoca, has entered a key new stage with the start of excavation for the tunnel boring machine (TBM) launch shaft.  Turkish general ... More Information

Underground Engineering in the Spotlight 1-3 October, Belgrade, Serbia

Serbian Association for Tunnels and Underground Structures in collaboration with the International Tunnelling and Underground Space Association will  host the Southeastern ... More Information

North End Connectors Awarded C$1.4B Contract for Yonge North Subway Extension Tunnelling

On August 6, 2025, Infrastructure Ontario (IO) and Metrolinx awarded North End Connectors a fixed-price C$1.4 billion contract to design, build, and finance the advance tunnelling phase of the Yonge ... More Information

Canyon Tunnel Project: A New Lifeline in the Central Valley

Overview & Purpose - The Canyon Tunnel Project is a major $84 million regional water infrastructure initiative carried out by the South San Joaquin Irrigation District (SSJID) in partnership ... More Information

Vietnam - Breakthrough of TBM Than Toc for Hanoi's Pilot Light Metro Line

Vietnam - Breakthrough of TBM Than Toc for Hanoi's Pilot Light Metro Line

On July 28, 2025 at 10h20 a.m.,  TBM n.1 named Than Toc (Lightning speed) - designed and manufactured by Herrenknecht, over 100 m length and 850 t weight -  successfully completed its ... More Information

Australia - New Sydney Metro West Updates

Australia - New Sydney Metro West Updates

TBMs Dorothy and Betty power into Parramatta Tunnelling for the Sydney Metro West project is nearly 90% complete, with the arrival of two TBMs at Parramatta’s metro station site. This marks a ... More Information

France – Breakthrough of the Marguerite de Catellan TBM at the Cote Pavee station on Toulouse Line C!

France – Breakthrough of the Marguerite de Catellan TBM at the Cote Pavee station on Toulouse Line C!

On Thursday 24 July, the TBM Marguerite de Catellan broke through at the future Côte Pavée station, Lot 4 of Toulouse Line C: click here for the video. The TBM - launched in ... More Information

HS2 lifts third giant TBM in London after 5.47 km (3.4-mile) underground journey

On Saturday 26th July, the team working on the HS2 project lifted the TBM Emily's 9.11m diameter cutterhead, front and middle shield, weighing 880 t, using a large gantry crane, at the Green Park ... More Information

Production of segments completed in Ahrental for the Austrian H41 construction site of the Brenner Base Tunnel

Production of segments completed in Ahrental for the Austrian H41 construction site of the Brenner Base Tunnel

On Saturday 19 July, production of the precast concrete segments used by the TBMs for the final lining of the line tunnels were completed at the Ahrental plant located  near the Austrian H41 ... More Information

Delhi Metro Rail Project update

The Delhi Metro Rail Project marked another significant milestone as Afcons Infrastructure’s Tunnel Boring Machine (TBM) Disha (1264B) achieved a breakthrough at the Tughlakabad Railway Colony ... More Information

Ontario Line - Name the first two TBMs

Be part of transit history! Here’s your chance to make your mark on Toronto’s newest subway line. The first two TBMs have arrived in Canada. They will dig the tunnels in the southern ... More Information

ITA Awards 2025 Finalists Announced

After rigorous adjudication by the Panel of Judges, the Finalists of the 2025 series of the ITA Tunnelling Awards has been announced. From a short list of 51 entries from 27 ... More Information

TBM replaced by traditional method on a 500 m section on the south side of Second Gotthard tunnel

In February 2025, excavation work began on the construction of the second tube of the Gotthard motorway tunnel. While the TBM on the north side is progressing steadily, on 23 June 2025 it was ... More Information

Italy - Gran Sasso Tunnel: measures to accelerate upgrading activities

The green light has been given for work on the Gran Sasso Tunnel to begin. They had needed to comply with current technical regulations on the tunnels safety in the trans-European road network ... More Information

Construction Begins on Cross Island Line Phase 2

The Land Transport Authority (LTA) has commenced civil construction works for Phase 2 of the Cross Island Line (CRL). Acting Minister for Transport Jeffrey Siow officiated the ground-breaking ... More Information

First Scheldetunnel Element Successfully Immersed in Antwerp

DEME Group has announced a major milestone in the construction of the Scheldetunnel, part of the Oosterweel Link in Antwerp. The first of eight prefabricated tunnel elements has now been ... More Information

Underground Breakthrough for €114M Athlone Drainage Project

The €114 million Athlone Main Drainage Scheme has recorded a successful breakthrough on its second underwater tunnel beneath the River Shannon—marking a significant milestone in the ... More Information

Torrens to Darlington Project Update

ADELAIDE, SA — July 2025: The Torrens to Darlington (T2D) Project continues to gain momentum, with June marking a month of significant progress across several key construction sites. As South ... More Information

Bhopal Metro Rail Project

The Bhopal Metro Rail Project has marked a significant milestone with the successful completion of the Factory Acceptance Test (FAT) for its first tunnel boring machine (TBM), designated TBM 427. ... More Information

Europe’s Largest Road Tunnel: The Lower Thames Crossing

Preparatory work for the Lower Thames Crossing—the future title-holder of Europe’s largest road tunnel—is slated to begin in late 2025 Project Overview Tunnel length: 2.6 ... More Information

Tunnelling News

Single-Bore Tunnel Method Chosen for BART Silicon Valley Phase II

This decision allows VTA to advance project design towards 60%, stay on a critical path to tunnel construction and meet the projected revenue service ... More Information

Boring Co. begins 'controlled blasting' for Nashville tunnel at TN capitol

The Boring Co. has started excavation work at a state-owned parking lot on Rose Parks Boulevard for the Music City Loop project Wednesday, Aug. 13, ... More Information

TBM arrives in Montreal for delayed metro extension project

A custom-built tunnel boring machine (TBM) has arrived in Canada for use on a 6km extension of the Montreal Metro... More Information

Spain Confirms Feasibility of €8.5 Billion Morocco-Europe Tunnel

The study was conducted by German company Herrenknecht, the world leader in tunnel boring machines, at the request of the Spanish government's ... More Information

TxDOT spends $748M to burrow bus-size tunnels under Central Austin

The first tunnel boring machine will be deployed near ... Industry experts say tunnel boring machines typically advance about 50 feet per day. More Information

6 TBMs on Duty on the 27-Kilometer Line in Körfezray

Two of the six Tunnel Boring Machines (TBMs) that will serve in the first 27-kilometer phase are actively excavating tunnels, while the ... More Information

Construction on HS2's Euston tunnel will start 'fairly soon', says rail minister

Construction on the HS2 tunnel from Old Oak Common station to Euston station will start “fairly soon”, the rail minister has said... More Information

Blue Line Extension TBM Arrives at Port of Montreal

Railway Track and Structures Construction site of the future Vertières station (Pie-IX) in June 2025. Caption and photo courtesy of STM. MONTREAL - The tunnel boring machine (TBM) ... More Information

Tunnel break through milestone for Mt Messenger Bypass project

A 110 tonne excavating machine, called Hinetūparimaunga, has broken through at the northern end of the project's 235 metre-long tunnel ... More Information

$3.9 billion tunnel and bridge link for VA

Costing around $3.9 billion, the Hampton Roads Bridge-Tunnel (HRBT) upgrade Expansion project for Virginia will improve traffic flow for a key ... More Information

Extended North Tunnel Flood Mitigation Project Receives $18.2 Million in State Funding

The funding advanced by the board includes a $17.2 million loan and $1 million grant for the construction of the mile-long tunnel, which will divert ... More Information

Gateway Project faces new uncertainty amid government shutdown

Federal funding for the $16B Hudson Tunnel Project, aka Gateway, has been paused during the government shutdown, sparking political backlash. More Information

Tunnel Boring Machine Emily Passes Key Factory Test for DC Water Potomac River Tunnel Project

Tunnel boring machine (TBM), Emily. This test confirms that Emily is ready to begin excavating the southern leg of the Potomac River Tunnel — a ... More Information

Sydney Metro West achieves world-first in tunnelling technology

Sydney Metro West has achieved a world-first in tunnel construction with a Lining Erector Machine (LEM) successfully being used to line the mined ... More Information

Gateway construction continues despite Trump's claim of termination

Tutor Perini, the general contractor on the Manhattan Tunnel Project, confirmed construction activity is currently continuing as planned... More Information

Tunnelling complete for Annacis water supply project

Metro Vancouver has completed the tunnelling phase of the $450 million Annacis Water Supply Tunnel, which will complete in 2028... More Information

Santa Clara VTA confirms single tunnel plan for BART extension

With VTA now owning the tunnel boring machine, the agency assumes full responsibility for its performance, agency officials said. To manage the risk, ... More Information

Chennai: Tunnel Boring Machine Vaigai achieves breakthrough at Mandaveli Metro Station

CHENNAI: The Chennai Metro Rail Limited (CMRL) on Saturday achieved a major milestone in Phase II tunnelling works, as Tunnel Boring Machine (TBM) ... More Information

Trump 'terminates' $16 billion Hudson River tunnel project linking N.J. and N.Y.C.

President Trump said funding for the $16 billion Gateway Tunnel project is "terminated" at a press conference. New Jersey officials said they will ... More Information

$676 million underwater tunnel for India

The project is expected to cost around $676 million, with a Detailed Project Report (DPR) having now been completed. India's road transport network is ... More Information

€1.4 billion Belgian tunnel project approved

The first phase of the €1.4 billion project for Belgium’s new Limburg Noord-Zuid link has been approved. Construction should commence in 2027 on the project, which will form a section of ... More Information

Tunnel boring machine S-639B achieves breakthrough under Kanpur Metro Phase I Project

The package KNPCC-06 involves design and construction of a tunnel through TBM, cut and cover tunnel, underground ramp from Kanpur Central end of ... More Information

Lawmakers propose construction of undersea tunnel to link Luzon and Visayas

Several lawmakers from the Visayas region are proposing the construction of an underground tunnel that will serve as a permanent land connection ... More Information

Oman-UAE rail project hits major milestone with start of tunnel excavation

Tunnel excavation has begun in Oman's Al Hajar Mountains, marking a major milestone for the cross-border Oman-UAE Railway... More Information

Engineering the depths: innovative tunnelling for hydropower projects

Major schemes in Austria, China, and Germany are applying advanced underground construction techniques for hydropower projects. More Information

New tunnel, new standard: Silvertown project showcases innovation in surface protection

Originally approved in 2018, construction of the tunnel began in March 2021. In September 2023, following the completion of tunnelling works, ... More Information

Metro Manila Subway Project: DOTr launches third tunnel boring machine

Dubai: The Department of Transportation (DOTr) has launched a third tunnel boring machine (TBM) for the Metro Manila Subway Project (MMSP), ... More Information

Skanska JV wraps up $450M Baltimore tunnel nearly 2 years early

A joint venture has reached substantial completion on the $450 million Howard Street Tunnel Project in Baltimore nearly two years ahead of the original completion date, according to a ... More Information

Work continues on NYC megaprojects, despite $18B federal funding pause

Contractors on two of New York City’s largest infrastructure projects will keep digging, but they might glance over their shoulders toward Washington... More Information

HS2 Chipping Warden tunnel project moves step forward

HS2 Ltd An aerial view of the HS2 tunnel construction at Chipping Warden. A road HS2 Ltd. The 1.55 mile (2.5km) Chipping Warden tunnel will be ... More Information

First of three Tunnel boring machines on way to SA as beams go up for tram overpass

The first of three tunnel boring machines that will be used to complete the northern and southern tunnels project is on its way to SA as part of a ... More Information

Chennai Metro Rail's TBMs to begin tunneling between Thiruvanmiyur and Indira Nagar

Chennai Metro Rail begins tunnelling work in challenging stretch for phase II project, facing obstacles due to hard rock... More Information

Custom lifting gantry aids TBM removal - Construction Briefing

The four TBMs excavated the 8.4 mile (14 km) Northolt Tunnel section. Two went in each way, digging a pair of tunnels from both ends towards each ... More Information

Tunnel construction begins on Barskoon — Bedel road in Issyk-Kul region

According to the project, two tunnels, 5,340 and 3,840 meters long, respectively, will be built at Sook and Ashuu-Suu passes. They will be among the ... More Information

China debuts world's mightiest centrifuge, unleashing ultra-intense gravity

China leads the way in shield tunnelling machine development · Shield machine of south line of Yellow River tunnel starts boring in Jinan · A close ... More Information

Boring Company Launches Global Operations Control Center in Bastrop, Texas

The Boring Company has officially opened its new Global Operations Control Centre in Bastrop, Texas, the tunnelling start-up announced on X... More Information

Port of Longview Lands $35.9MM Federal Loan for Rail Expansion

Active Construction on New Hudson Tunnel Project Supporting Domestic Jobs and Economic Output ... Bridges/Tunnels, Class 1, Freight, Ports, Track ... More Information

TBM Parvati Achieves Breakthrough At Kakadeo Station Of Kanpur Metro Line 2

Brief Scope: Design and Construction of TBM Tunnel, Cut and Cover Tunnel, ramp after Double Pullia, ramps in Agriculture Depot for main line and ... More Information

Howard Street tunnel reopens ahead of schedule, boosting Baltimore's freight capacity

The Howard Street Tunnel has been reopened after being out of service since February 2025.The nearly 130-year-old tunnel extends north from Camden Yards to the Mount Royal Station and is ... More Information