Tunnelling construction projects and references
References for tunnel construction
Get an idea of our work and take a look at our projects. Below you will find a selection of reference projects that we are currently realising or have realised in recent years.
References
Vasastan
Göteborg, Sweden
Start of construction:
October 2024
Construction volume (value of our services):
87,6 M EUR
Costs converted according to average yearly exchange rates during project realization
The Vasastan project is part of the Haga section of the Western Link, which also includes Haga station. The tunnel construction for a large station area with a span of more than 50 meters includes a railroad tunnel, a parallel…
Tunnel Ligerz, Lot 2
Ligerz, Switzerland
Start of construction:
September 2024
Construction volume (value of our services):
230 M EUR
Costs converted according to average yearly exchange rates during project realization
The project comprises the construction of the 2.1 km long twin-track tunnel in Ligerz. The total contract value is CHF 220 million, with Implenia's share amounting to around CHF 150 million.
E39 Rogfast, E02 Kvitsøy contract
Kvitsøy, Norway
Start of construction:
August 2024
Construction volume (value of our services):
438 M EUR
Costs converted according to average yearly exchange rates during project realization
The Joint Venture (JV) of Implenia and Stangeland Maskin (Implenia 77%, Stangeland Maskin 23%) has been awarded with a second contract for the Rogfast project by the Norwegian Public Roads Administration. The total contract value…
K2D Skøyen – Vækerø
Oslo, Norway
Start of construction:
March 2023
Construction volume (value of our services):
114 M EUR
Costs converted according to average yearly exchange rates during project realization
Implenia has been awarded the contract for section K2D Skøyen - Vækerø, which is part of the entire Fornebu line that will be completed in 2030. The contract is a continuation of an ongoing tunnel contract for the Fornebu line…
Metro Toulouse line C, Lot 3
Toulouse, France
Start of construction:
January 2023
Construction volume (value of our services):
332 M EUR
The third metro line, Line C, will connect Colomiers and Labège in 20 minutes. Faster journeys, less congestion and pollution: this will benefit the quality of life and the environment. Implenia - Demathieu Bard Construction has…
E03 Boknafjordtunnelen sør (Rogfast)
Stavanger, Norway
Start of construction:
January 2023
Construction volume (value of our services):
355 M EUR
Costs converted according to average yearly exchange rates during project realization
E03 - The southern part of the Boknafjord tunnel is part of the E39 Rogfast. A total of 26.7 km of underwater main tunnel will be constructed between Harestad and Laupeland in Stavanger.
Secondo tubo San Gottardo - Lot 241, Main Tunnel North
Göschenen, Switzerland
Start of construction:
October 2022
Construction volume (value of our services):
449 M EUR
Costs converted according to average yearly exchange rates during project realization
The present project includes the execution of the second tunnel tube north (2TG), the fault zone drive north, the second stage of the precut, the TBM launch section, the cross connections, the ventilation control centers and the…
KS-2 Tangenvika jernbanebru
Stange, Innlande, Norway
Start of construction:
May 2022
Construction volume (value of our services):
165 M EUR
Costs converted according to average yearly exchange rates during project realization
Bane NOR and Implenia Norway has entered a contract to construct a railway bridge with a double-track railway over Tangenvika in Stange Kommune. The contract, which is a turnkey contract for Tangenvika railway bridge, is the…
Brenner Basistunnel Los H41
Pfons, Austria
Start of construction:
January 2022
Construction volume (value of our services):
651 M EUR
The Brenner Base Tunnel is a flat railroad tunnel connecting Italy and Austria. It runs between Innsbruck and Franzensfeste over a length of 55 km.
Sofia
Stockholm, Sweden
Start of construction:
August 2021
Construction volume (value of our services):
120 M EUR
Sofia metro station is part of the extension of the blue line towards Gullmarsplan and Nacka
Franzensfeste-Waidbruck, Baulos 1, Brenner
Franzensfeste, Italy
Start of construction:
June 2021
Construction volume (value of our services):
1.071 B EUR
Construction lot 1 from Franzensfeste to Waidbuck will run almost entirely as a tunnel and reach a length of approx. 22.5 km. The challenging construction project includes the construction of two new rail tunnel sections as well…
K2A Tunnel og grunnarbeider Lysaker-Fornebu
Fornebu, Bærum, Norway
Start of construction:
May 2021
Construction volume (value of our services):
118 M EUR
Costs converted according to average yearly exchange rates during project realization
The Fornebubanen will establish a new t-train line between Majorstuen and Fornebu. The line will run 8 km in a tunnel under the hill. The line will start with a new station and base at Fornebu and extend to Majorstuen where the…
Secondo tubo San Gottardo - Lot 243, North access tunnel
Göschenen, Switzerland
Start of construction:
April 2021
Construction volume (value of our services):
85,1 M EUR
Costs converted according to average yearly exchange rates during project realization
To rehabilitate the existing Gotthard Road Tunnel, a second tunnel tube (2TG) will be built first. Lot 243 comprises the construction of the access tunnel and the north logistics excavations. The project serves for the…
E39 Lyngdal Øst - Lyngdal Vest
Lyngdal, Norway
Start of construction:
January 2021
Construction volume (value of our services):
275 M EUR
Costs converted according to average yearly exchange rates during project realization
E39 Lyngdal East - Lyngdal West stretches from Herdal to Røyskår for a total of 11 km. The project involves a longer road with several tunnels, bridges and complex infrastructure. The contract will be executed as a total contract…
District heating tunnel – West (FWS-West) Southern Line
Hamburg, Germany
Start of construction:
January 2021
Construction volume (value of our services):
75,6 M EUR
Costs converted according to average yearly exchange rates during project realization
Wärme Hamburg is a 100% municipal heat supplier and, with the "FWS-West project", intends to install a district heating line from the new CHP plant to be built at the Dradenau site through the Waltershof port area, in a new…
TELT, CO08 - Villard Clément
Lyon, France
Start of construction:
January 2021
Construction volume (value of our services):
248 M EUR
Construction of the base tunnel from the Villard Clément portal attacks.
CERN - Galerie UA 53
Cessy, France
Start of construction:
November 2019
Construction volume (value of our services):
280.000 EUR
All for science: CERN, the European Organisation for Nuclear Research (Conseil Européen pour la Recherche Nucléaire), is one of the largest and most renowned centres for basic physics research in the world.
380-kV-Kabeldiagonale, 50hertz
Berlin, Germany
Start of construction:
August 2019
Construction volume (value of our services):
128 M EUR
Cable diagonal Berlin - Construction of a 6.7 km long cable tunnel with 4 shafts as supply / rescue shafts
Sandbukta-Moss-Såstad (SMS2A)
Sandbukta, Moss, Såstad, Norway
Start of construction:
June 2019
Construction volume (value of our services):
597 M EUR
Costs converted according to average yearly exchange rates during project realization
The project New double track Sandbukta-Moss-Såstad (SMS2A) is part of the Intercity expansion, and is one of the parsellene in the direction of Halden (Østfoldbanens vestre line). On the line, 10.3 km of new double track will be…
Fv. 6312 Berfjorden
Roan, Norway
Start of construction:
February 2019
Construction volume (value of our services):
22 M EUR
Costs converted according to average yearly exchange rates during project realization
Existing Fv. 6312 was curved, narrow and heavily skredutsatt. The route had poor accessibility and a traffic volume of 380 vehicles, 15% of which was heavy traffic. New route 6312 is a landslide protection project which included…
U-Bahn Linie 17.1 - Paris Grand Paris Express
Paris, France
Start of construction:
January 2019
Construction volume (value of our services):
441 M EUR
With a length of 27 km, line 17 extends over 13 municipalities in the departments of Seine-Saint-Denis, Val-d'Oise and Seine-et-Marne. It connects nine stations between Saint-Denis Pleyel and Le Mesnil-Amelot in less than…
Usine à voussoirs d’Ambronay (Lyon)
La Chapelle, France
Start of construction:
January 2019
Construction volume (value of our services):
105 M EUR
Implenia France has set up its own production plant for segments (tunnel lining) in a joint venture with Demathieu Bard to meet the needs of the Lyon Metro Line B extension project.
München Haltepunkt Marienhof
München, Germany
Start of construction:
January 2019
Construction volume (value of our services):
395 M EUR
The major project 2nd S-Bahn main line Munich consists of the sub-projects "above-ground areas", "inner city area/tunnel" and "supplementary network measures" in the outer branches.
Citylink Anneberg-Skanstull Tunnel
Stockholm, Sweden
Start of construction:
December 2018
Construction volume (value of our services):
90 M EUR
As the second of four phases of the so-called City Link Project, the Anneberg-Skanstull Tunnel serves to improve the power supply in the Greater Stockholm area. At a length of around 14 km and a diameter of 5 m, the tunnel is…
RBS Los 1.2 Postparc – Ausbau Bahnhof Bern
Bern, Switzerland
Start of construction:
August 2018
Construction volume (value of our services):
12,4 M EUR
Costs converted according to average yearly exchange rates during project realization
Sub-project involving the expansion of Bern train station
Varberg Tunneln FAS 2
Varberg, Sweden
Start of construction:
June 2018
Construction volume (value of our services):
328 M EUR
Strategically important railway project in Varberg.
Rönnskär - Endlager
Skellefteå, Sweden
Start of construction: January 2018
Implenia Sweden is building a repository for process waste from Boliden's Rönnskär copper smelter in Skelleftehamn. Boliden has awarded Implenia the contract, which essentially consists of drilling and blasting a series of rock…
Slussen SN91
Stockholm, Sweden
Start of construction:
January 2018
Construction volume (value of our services):
77 M EUR
Extensive rock and concrete work at Katarina Mountain
Line B of the Lyon Metro
Lyon, France
Start of construction:
January 2018
Construction volume (value of our services):
394 M EUR
This project, with a length of approximately 2.5 km, will extend line B from Gare d'Oullins station to Hôpitaux Lyon Sud station and create two additional stations. The journey time between Oullins station and the Lyon Sud…
Åseral Nord
Åseral, Norway
Start of construction:
January 2018
Construction volume (value of our services):
59,5 M EUR
Costs converted according to average yearly exchange rates during project realization
Åseral North is located in the upper part of the Mandalsvassdraget in West Agder, existing facilities were built in the 1950s. In this undertaking, the Langevatn Dam was replaced by a new stone infill dam, which constitutes 10…
Extension of Metro B – Hopitaux Lyon Sud – GC01
LYON, France
Start of construction:
December 2017
Construction volume (value of our services):
138 M EUR
In order to serve the city center of Oullins, the university-hospital hub of Lyon Sud, to create a multimodal exchange center and globally to intensify the development of the "valley of hospitals", SYTRAL has decided to extend…
Tubbing factory – Limoges Fourches
Limoges-Fourches, France
Start of construction:
December 2017
Construction volume (value of our services):
105 M EUR
Implenia France, within the ALLIANCE group, has developed a specific production tool for segments (tunnel lining) for the needs of Grand Paris.
Getingmidjan
Stockholm, Sweden
Start of construction:
April 2017
Construction volume (value of our services):
88 M EUR
Complex project in the heart of Stockholm.
Rv. 36 Skyggestein–Skjelbredstrand
Skien, Telemark, Norway
Start of construction:
January 2017
Construction volume (value of our services):
33,9 M EUR
Costs converted according to average yearly exchange rates during project realization
Rv. 36 Skyggestein - Skjelbredstrand is part of Bypakke Grenland Phase 1. The project is the largest single project in Bypakke Grenland together with fv. 32 Gimlevegen - Augestadvegen.
Extension of Métro Ligne 15 South, Lot T2C, Paris
Paris, France
Start of construction:
December 2016
Construction volume (value of our services):
365 M EUR
The “Grand Paris Express” project aims to improve links between the French capital and neighboring residential areas in the Greater Paris region (Île-de-France) by building a transport network of six driverless underground…
E134 Myntbrua–Trollerudmoen
Kongsberg, Norway
Start of construction:
May 2016
Construction volume (value of our services):
103 M EUR
Costs converted according to average yearly exchange rates during project realization
Implenia builds the new E134 through Kongsberg in Buskerud. The contract is one of three main contracts on E134 between Damåsen and Saggrenda. One of the challenges for the project is areas with very little overburden. …
Sanierung Abwasseranlagen Breitenrain
Bern, Switzerland
Start of construction:
May 2016
Construction volume (value of our services):
12,6 M EUR
Costs converted according to average yearly exchange rates during project realization
The sewer systems in Viktoriastrasse and Moserstrasse in Bern have reached their age and are being replaced.
Albvorlandtunnel
Wendlingen am Neckar, Germany
Start of construction:
January 2016
Construction volume (value of our services):
675 M EUR
The new railway link (NBS) Wendlingen-Ulm together with Stuttgart 21 significantly improves the infrastructure of Baden-Württemberg and thus creates shortened travel and transport times not only in Baden-Württemberg but also…
Extension of Métro Ligne 11, Lot GC01, Rosny-sous-Bois, Paris
Paris, France
Start of construction:
December 2015
Construction volume (value of our services):
267 M EUR
The “Grand Paris Express” project aims to improve links between the French capital and the neighboring residential areas in the Greater Paris region (Île-de-France) by building a transport network of six driverless underground…
SGP – Ligne 15 sud, Lot T2C
Noisy-Champs, France
Start of construction:
December 2015
Construction volume (value of our services):
365 M EUR
The Grand Paris Express project aims to better connect the French capital and neighbouring residential areas in the Paris region by building a six-line driverless metro system by 2030. The project will require 210 kilometres of…
K11 Rådal – Nordås – Flyplassvegen
Bergen, Norway
Start of construction:
September 2015
Construction volume (value of our services):
148 M EUR
Costs converted according to average yearly exchange rates during project realization
E39 K11 Rådal - Nordås - The airport road is Implenia's largest road project in Norway and one of two main contracts on the E39 between Bergen and Os, which are part of the new standard road between Kristiansand and Trondheim. …
SBB Bözbergtunnel
Strihen, Switzerland
Start of construction:
May 2015
Construction volume (value of our services):
134 M EUR
Costs converted according to average yearly exchange rates during project realization
The existing Bözberg tunnel between Frick and Brugg does not meet the new requirements for the clearance gauge (corner height 4.0 m) and will therefore be replaced by a new 4-metre corridor as part of the overall project. …
Semmering Basistunnel Los 1.1
Maria Schutz, Austria
Start of construction:
January 2015
Construction volume (value of our services):
457 M EUR
The approximately 27.3 km long Semmering Basistunnel is one of the most important and complex infrastructure projects in the heart of Europe. This double-tube railway tunnel is located between Gloggnitz and Mürzzuschlag, linking…
E4 Förbifart, Johannelund Tunnel
Vällingby, Sweden
Start of construction:
January 2015
Construction volume (value of our services):
254 M EUR
The bypass “Förbifart” Stockholm is a link between the north and south of the capital of Sweden and intends to relieve the traffic through the city. The 21 km long bypass motorway, of which approximately 17 km are underground in…
Lysebotn II Kraftverk
Lysebotn, Norway
Start of construction:
May 2014
Construction volume (value of our services):
67 M EUR
Costs converted according to average yearly exchange rates during project realization
Lysebotn power plant is the main power plant of the Lyse Group and was opened in 1953 with a capacity of 210 mW. The development of Lysebotn II has provided a new output of 370 mW and was commissioned in 2018. The development…
E6 Vinstra - Sjoa
Vinstra, Norway
Start of construction:
February 2014
Construction volume (value of our services):
176 M EUR
Costs converted according to average yearly exchange rates during project realization
E6 Vinstra-Sjoa is part of Frya-Sjoa, which has been one of the biggest road developments in Norway in recent years. The contract was noted as the part of the "Plant of the Year" in 2016.
Semmering Basistunnel SBT Los 2.1
Steiermark, Austria
Start of construction:
January 2014
Construction volume (value of our services):
623 M EUR
The planned Semmering Base Tunnel (SBT) is currently one of the most important large-scale infrastructure projects in the heart of Europe, and forms part of the new Austrian southern railway, a central axis on the trans-European…
UFP-08 Eidanger
Porsgrunn, Norway
Start of construction:
September 2013
Construction volume (value of our services):
72,3 M EUR
Costs converted according to average yearly exchange rates during project realization
Das Projekt UFP-08 Eidanger ist Teil der neuen Eisenbahnstrecke zwischen Larvik und Porsgrunn, die in der Zuteilung der "Vestfold Line, Farriseidet - Porsgrunn" enthalten ist. Der Abschnitt wird zweigleisig für eine…
Funicular railway Schwyz-Stoos
Schwyz, Switzerland
Start of construction:
May 2013
Construction volume (value of our services):
22 M EUR
Costs converted according to average yearly exchange rates during project realization
The existing funicular on the Stoos will be replaced by a new construction (the concession of the existing funicular is expiring and cannot be extended) with new lines. The type of cableway to be used is a funicular in shuttle…
Brokke Nord
Bykle, Setesdal, Norway
Start of construction:
May 2012
Construction volume (value of our services):
59,9 M EUR
Costs converted according to average yearly exchange rates during project realization
The project involved the shell works for the Brokke North power plant and included the construction of a new transmission tunnel, the construction of the Sarvoss dam and the Skarg power plant.
U5 Berlin
Berlin, Germany
Start of construction:
January 2012
Construction volume (value of our services):
159 M EUR
Construction of 1.6-kilometre-long double-tube tunnel and shell construction of two stations in central Berlin
Fréjus tunnel safety gallery
Fréjus, France
Start of construction:
January 2009
Construction volume (value of our services):
128 M EUR
Following the fire of the Mont Blanc Tunnel in 1999, substantial changes were made to the regulations which resulted in the Fréjus Tunnel being brought into compliance. The Société Française du Tunnel Routier du Fréjus (SFTRF)…
European XFEL Röntgenlaserprojekt
Hamburg, Germany
Start of construction:
January 2009
Construction volume (value of our services):
206 M EUR
The European XFEL (X-Ray Free Electron Laser) project brings a new research facility to Hamburg.
Tunnel Silberberg
Großbreitenbach, Germany
Start of construction:
January 2009
Construction volume (value of our services):
222 M EUR
The New Railway Line of the German Railway System from Ebensfeld to Erfurt is part of the “Deutsche Einheit” Track No. 8 expansion and new railway project that runs from Nuremberg to Berlin. It is the connecting link between the…
Citybanan Project Odenplan and Vasatunnel
Stockholm, Sweden
Start of construction:
December 2008
Construction volume (value of our services):
147 M EUR
The Citybanan connects the northern and the southern part of Stockholm subterranean with two additional rail tracks and doubles the capacity of the rail connection which exists since 1871. The wider area of Stockholm increases by…
Pumpspeicherkraftwerk Nant de Drance
Finhaut VS (Le Châtelard), Switzerland
Start of construction:
January 2008
Construction volume (value of our services):
602 M EUR
Costs converted according to average yearly exchange rates during project realization
Construction of an underground pumped-storage power station for the Nant de Drance pumped-storage power plant.
Norra Länken 12 och 22
Stockholm, Sweden
Start of construction:
December 2007
Construction volume (value of our services):
165 M EUR
The design was carried out by Technisches Büro, Implenia's, then Bilfinger's, in-house Structural Design department.
Weinbergtunnel DML SBB Zürich ATW
Zürich, Switzerland
Start of construction:
January 2007
Construction volume (value of our services):
257 M EUR
Costs converted according to average yearly exchange rates during project realization
Construction of a two-track railway tunnel with a TBM.
Wehrhahn line, lot 1
City of Düsseldorf, Germany
Start of construction:
December 2006
Construction volume (value of our services):
455 M EUR
In order to improve the local public transportation system, the state capital of Duesseldorf has made the decision to expand the so-called core section of the Wehrhahn Line as an underground city railway line, replacing 5…
Tunnel Clem Jones (CLEM 7) NSBT
Brisbane, Australia
Start of construction:
December 2005
Construction volume (value of our services):
1.167 B EUR
The Clem Jones Tunnel (also known as North South Bypass Tunnel) is part of the Brisbane City Council’s vision to meet the existing and future transport needs of Brisbane. The project connects the north-south traffic below…
East Side Combined Sewer Overflow ESCSO
Portland, United States
Start of construction:
May 2005
Construction volume (value of our services):
349 M EUR
As the largest of all Portland’s projects to reduce overflows into the Willamette River, the East Side Combined Sewer Overflow tunnel is designed to significantly reduce sewage and storm water overflows. To reduce risk exposure…
Malmö Citytunnel Lot E201
Malmö, Sweden
Start of construction:
December 2004
Construction volume (value of our services):
325 M EUR
The Citytunnel Malmö is part of the in total 17 km long railway infrastructure project to improve connections of the Swedish railway network across the Öresund Bridge to Denmark and the European high speed railway network. …
Métro Lausanne, M2 Lot 1700
Lausanne, Switzerland
Start of construction:
March 2004
Construction volume (value of our services):
33 M EUR
Ouchy-Epalinges metro line via the Central Station and Place de l'Europe. Total length: 6 km, 14 stops, 9 tunnels and 5 bridges.
Wienerwald-Tunnel
Westportal Wienerwaldtunnel, Austria
Start of construction:
December 2003
Construction volume (value of our services):
341 M EUR
The Wienerwald Tunnel is an integral part of the new high speed railway line between Vienna and St. Pölten.
Wientalsammelkanal
Vienna, Austria
Start of construction:
January 2003
Construction volume (value of our services):
40,7 M EUR
Costs converted according to average yearly exchange rates during project realization
To maintain water quality and to protect the Vienna River from canalisation, the City of Vienna began constructing the Vienna Valley Sewer (known as the Wiental-sammelkanal or WSKE) in May 2003. This is one of several projects…
Lötschberg Basistunnel
Niedergesteln, Switzerland
Start of construction:
October 2002
Construction volume (value of our services):
515 M EUR
Costs converted according to average yearly exchange rates during project realization
The Lötschberg base line runs from Frutigen to Raron. In the north, it includes the connection to the BLS line and the Frutigen bypass with the Engstligen tunnel, the Lötschberg base tunnel and, in the south, the Rhone crossing…
Sedrun tunnel, lot 360, AlpTransit, Gotthard Base Tunnel
Sedrun, Switzerland
Start of construction:
December 2001
Construction volume (value of our services):
1.061 B EUR
Costs converted according to average yearly exchange rates during project realization
Construction of two parallel single-track railway tunnels using blasting, and construction of a multi-function station.
Bodio & Faido sections, Alptransit Gotthard Base Tunnel
Bodio - Faido, Switzerland
Start of construction:
January 2001
Construction volume (value of our services):
1.996 B EUR
Costs converted according to average yearly exchange rates during project realization
Construction of two parallel single-track railway tunnels with a Gripper TBM and of a multi-function station using blasting
Taiwan High Speed Railway
Changhua, 石牌里, Taiwan
Start of construction:
May 2000
Construction volume (value of our services):
166 M EUR
Lot 6 (C 260) is 36.60 km long and includes seven tunnels with a total length of 9,245 m. The 7,276 m long Paghuashan Tunnel is the longest of tunnels. The lengths of the two northern and four southern shorter tunnels range…
CERN LHC, Los 1
Genf, Switzerland
Start of construction:
January 1998
Construction volume (value of our services):
68,5 M EUR
Costs converted according to average yearly exchange rates during project realization
Construction contract for CERN, the European Organization for Nuclear Research (Conseil Européen pour la Recherche Nucléaire). CERN is one of the largest and most renowned centers for basic research in physics in the world.…
4th tube Elbe tunnel
Hamburg, Germany
Start of construction:
January 1995
Construction volume (value of our services):
287 M EUR
Costs converted according to average yearly exchange rates during project realization
A fourth tube was added to the Elbe tunnel in Hamburg due to the increased volume of traffic.
Fv 48 Tunnel behind Tysse
Tysse, Norway
Construction volume (value of our services):
25,6 M EUR
Costs converted according to average yearly exchange rates during project realization
Implenia has constructed a new tunnel from Sætrevika to Tysseelva. The aim of the project was to relieve the centre of Tysse of through-traffic on FV 48 and to improve the poor road standard on this stretch. Implenia has…
Kvarnholmsförbindelsen
Stockholm, Sweden
Construction volume (value of our services):
29,9 M EUR
Kvarnholmen is an island in the Stockholm Archipelago that was used industrially. The former industrial area has now been developed into a vibrant urban environment.
E39 Eiganestunnelen
Jølster, Norway
Construction volume (value of our services):
174 M EUR
Costs converted according to average yearly exchange rates during project realization
The E39 Eiganes tunnel (Lot E04) is part of the coastal main road between Kristiansand and Trondheim and is built in conjunction with rv.13 Ryfast which connects the municipal districts of Strand and Stavanger. This urban road…