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Hydrodemolition – Tapered Conduit Cuts - Inside a Tunnel System - Author: Chris Turney

Hydrodemolition – Tapered Conduit Cuts - Inside a Tunnel System - Author: Chris Turney

Walco Industries Ltd. was asked to complete a hydrodemolition project at a hydropower dam. The dam is located in western Canada and is one of the largest earthen dams in the world. It’s a ... More Information

Italy/Liguria –TBM launch for the Bisagno Flood Relief tunnel on October 1st

On October 1st, 2025, the TBM (1,280 tons) will be launched — it arrived by ship from China at the Messina terminal last February. The use of the TBM will accelerate the excavation of the 5.5 ... More Information

The new Oural tunnel on the Ourense-Monforte-Lugo corridor to be inaugurated soon

On September 23, ADIF will inaugurate the new Oural tunnel, a milestone in the comprehensive renovation and modernization of the Ourense-Monforte de Lemos-Lugo corridor (117 km), which connects to ... More Information

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

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

Tunnelling News

New game-changing tunnel boring, reef cutting 'meeting and beating' all expectations

UG2 reef at Bokoni is the target of the twin mobile tunnel boring and narrow reef cutter. Tunnelling will be done with the mobile tunnel borer for ... More Information

Mota-Engil CEO confirms winning bid for Santos-Guaruja tunnel

The company's subsidiary, Mota-Engil, has won the tender for the construction and operation of Brazil's first underwater tunnel, connecting the ... More Information

Metro Vancouver Utility Nearing Finish of $288M Annacis Water Tunnel

“Resilience is at the heart of this project,” said Nedim Alca, COWI's North America market director. “What makes this milestone so significant is not ... More Information

Fehmarnbelt: Danish tunnel portal nears completion

The work on the entrance to the Fehmarnbelt tunnel at Rødbyhavn on Lolland is almost complete. photo courtesy of The Fehmarnbelt Project. More Information

Final decision on airport tunnel 'now or never'

Alderman Jim Stevenson and City administrators are making a dramatic last push for the airport tunnel before construction on the new north/south ... More Information

Athens Metro Line 4 works to finish by 2029

The construction of Athens Metro Line 4 is progressing steadily, with the entire project ... Tunnel mistakenly excavated in Athens metro project. More Information

First trains on track to run through Metro Tunnel within three months

Melbourne's $15.5 billion Metro Tunnel could be switched on in as little as three months as construction wraps up at two CBD stations and trains ... More Information

Petersburg crews to begin tunnel project in response to ongoing flooding, damage - WRIC

As ongoing water issues have caused significant damage to infrastructure around Petersburg, the Old Towne neighborhood ... More Information

Intelligent optimization framework for tunnel construction

Tunnel construction forms the foundation of railway development and is essential for ensuring route continuity and operational efficiency. However, ... More Information

São Paulo positions TBM for next phase of Line 2-Green

A major milestone was reached on Monday (1 September) with the lowering of the cutter head of the tunnel boring machine (TBM) Cora Coralina... More Information

The 700-ton machine that'll dig NYC's Second Avenue subway extension

NYC has a new tunnel boring machine in its toolbox for the expansion of the line under 2nd ave. If you've never seen some BIG earth moving machines, ... More Information

Light at the end of the tunnel showing for Mount Washington transit project

The project is expected to be completed in October. New tracks finally emerge from the Mount Washington Transit Tunnel as a part of Pittsburgh ... More Information

Davao City Bypass South Tunnel hits breakthrough towards improved connectivity

The Construction Project with the ceremonial breakthrough of the southbound tunnel, marking the complete excavation from opposite ends of the ... More Information

Which companies are bidding for the US$2.3bn highway and tunnel contracts in Brazil?

The project in Brazil, as it will be the country's first underwater tunnel,” the person added. The project involves construction of a 1.5km tunnel ... More Information

US Northeast Rail Corridor Gets a Major Makeover with Tunnel and Bridge Replacements

This project is designed to replace tunnels severely damaged by Superstorm Sandy, ensuring smoother and more reliable service for Amtrak, NJ Transit, ... More Information

DPWH, JICA celebrate breakthrough of Southbound Tunnel in Davao Bypass

The event marked the successful connection of the tunnel's north and south ends. The ... More Information

Jacobs joins Ramboll on Marselis road tunnel project in Denmark

Danish Road Directorate senior project manager Michael Schmidt Vosgerau said: “It is a complex task to build a tunnel on one of the busiest access ... More Information

Planning continues for Midway Tunnel, Safe Streets for All projects

The Midway Tunnel project is a $13.4 million plan ... construction of a new overpass bridge and pedestrian and bicycle walkway above the tunnel. More Information

Four million tons of clay moved in HS2 excavation

Construction on HS2's second-longest tunnel started in October 2022. The rotating cutters cut away clay and other material at a rate of about 50ft ... More Information

Jacobs Has Design-CM Role on $640M Denmark Tunnel, With Ramboll as Key Consultant

Set to begin construction in 2028, Marselis Tunnel project is core component of the country's 10-year Infrastructure Plan 2035. By Emell D. Adolphus. More Information

Elon Musk's $760,000,000 plan to build underground tunnels beneath Houston, Texas

Elon Musk's next big construction plan from The Boring Company could build $760000 worth of tunnels beneath Houston to help with flooding... More Information

Kerala Moves Closer To Vizhinjam–Balaramapuram Tunnel Rail Project

The Kerala government is preparing to invite bids next month for the tunnel rail project linking Vizhinjam International Seaport with ... More Information

Norway's Ship Tunnel Project Under Threat as Costs Rise

New cost estimates suggest the ambitious project will far exceed its approved budget, raising questions about whether it will ever be built. More Information

Davao City Bypass southbound tunnel nears breakthrough

The Department of Public Works and Highways (DPWH) announced that the southbound tunnel of the Davao City Bypass Construction Project (DCBCP) is ... More Information

CA should pursue better alternatives to the costly Delta Tunnel Project Stocktonia

Governor Gavin Newsom is attempting to fast-track the construction of a massive, budget-busting water tunnel through the Delta to ship freshwater to ... More Information

Physical Origins of Shear Strength Fluctuations in Fault Gouges

Fault gouge is rock texture within fault zones that may include rock fragments (RF) and foliated structures. Previous studies have primarily focused on remould soils, the natural structure ... More Information

Webuild expands its role in high-speed rail projects

Four modern tunnel boring machines will be deployed to ensure precision and safety in complex geological conditions. Once completed, the old single- ... More Information

Hudson Tunnel Project advances as tunnel boring machines near completion

The Hudson Tunnel Project hit a key milestone as massive tunnel boring machines near completion, with delivery set for November. More Information

Nagdhunga tunnel in final stages of construction

If we look at the history of road construction and development in Nepal, there are various records of road construction starting from the Rana period. According to articles published in ... More Information

Boring of tunnel across Yellow River completed in China's Shandong

Constructed by using a "Shanhe" shield machine with a 17.5-meter excavation diameter, this double-deck, two-way, six-lane tunnel stands as the world's ... More Information

The £1.6bn plan for world's deepest underwater road tunnel leaving 'no room for error'

Opening of Rogfast tunnel under construction. The Rogfast tunnel will be the longest and deepest undersea road tunnel on Earth. (Image: SKANSA). A ... More Information

Tunnelling complete on NSW's Coffs Harbour bypass project

Tunnelling has been completed on the A$2.2bn (£1.1bn) Coffs Harbour bypass project in New South Wales, Australia, with the excavation of the third ... More Information

Veidekke acquires tunnel construction contract for Gothenburg's West Link Project

Veidekke has received a contract from the Swedish Transport Administration to build the Stora Hamnkanalen tunnel, a component of the West Link ... More Information

German Rail completes construction of Rastatt Tunnel

GERMAN Rail (DB) has completed civil works on the new 4270m twin-bore Rastatt Tunnel, a major component of the project to widen to four tracks the ... More Information

Final contracts signed for Eastern Freeway transformation

A huge amount of work is underway to build North East Link and upgrade the freeways – two tunnel boring machines are digging deep under Rosanna ... More Information

Progress on Sydney pipeline duplication

Bouygues Construction Australia and Rob Carr have launched a tunnel boring machine (TBM) on Sydney Water's Thornleigh pipeline duplication ... More Information

The latest plan to connect BART to downtown San Jose: One tunnel rather than two

When BART and Santa Clara Valley Transportation Authority first discussed plans to send trains rolling under downtown San Jose, transit officials contemplated a design with two tunnels ... More Information

Nashville Tesla tunnel: Here's when construction could start on the Music City Loop

Elon Musk's The Boring Company is currently in the design phase of constructing a tunnel connecting downtown Nashville to the Nashville ... More Information

World's longest underwater 'mega tunnel' to cost $46 billion but will halve 21-hour drive

Oddvar Kaarmo, the Rogfast project manager, cited additional motivation for the tunnel's construction: "The port at Mortavika is quite exposed and ... More Information