• 51Թ GeoInfrastructure

Specialist in earthworks for major infrastructure projects

All over the world, 51Թ’s subsidiary specialised in earthworks for major projects designs and builds large-scale infrastructures that promote mobility and contribute to climate resilience.

Its know-how in large-scale projects, its capacity to carry out on its own earthworks and associated structures, and its expertise in design, geotechnics, topography, the environment and stakeholder involvement ensure the company has a comprehensive management of its projects.

Mobility

Linear infrastructures that promote mobility: road works, railway works, airport works, maritime and canal works

Resiliency

Infrastructures that contribute to climate resilience: infrastructures for low-emission energy storage/production, dams and water reservoirs

Current worksites

Widening of the A480 motorway (Grenoble)

France

2019-2022

Widening of the A480 motorway (Grenoble)

France

interchange
3,000&Բ;²
of soundproof walls set up
12
engineering structures

Works to widen the A480, aiming at separating through-traffic from local traffic and therefore improving traffic flow where the A480 interconnects with the southern bypass of Grenoble.

 

Duration of works: 36 months

 

Owner: AREA motorway company

Joint venture: 51Թ Terrassement Grands Projets, 51Թ in France and Eurovia

High Speed 2 (HS2 railway line)

United Kingdom

2020-2027

High Speed 2 (HS2 railway line)

United Kingdom

90 km 
of high-speed line (HSL)
32&Բ;DzԲ&Բ;³
of excavated material
1.8&Բ;Dz&Բ;³
of concrete

Construction of a 90 km portion of a high-speed line which will link London to Birmingham by 2027.

 

HS2 is Europe’s most recent largest infrastructure project. It will deliver faster travel to many towns and cities across Britain and create numerous jobs.

 

Duration of works: 74 months

 

Owner: High Speed 2 Ltd

Design & Build Group: Balfour Beatty-51Թ (BBV) Joint Venture, Balfour Beatty, 51Թ Grands Projects and 51Թ Terrassement Grands Projets

 

High Speed Line Stuttgart 21 (S21)

Germany

2018-2022

High Speed Line Stuttgart 21 (S21)

Germany

10 km
of earthworks and drainage & 18 km of side roads
19,000&Բ;²
of soundproof walls
11
structures

Construction of section 1.4 of the Stuttgart 21 high-speed line. Its aim was to relieve congestion at the Stuttgart railway junction and modernise it. This junction continues on with the new line running from Wendlingen to Ulm. Overall, the Stuttgart 21 project combines a new central underground station – a true hub for mobility – and 4 other train stations. Its route includes 120 km of new high-speed track (reference speed of 250 kmph) connecting the Stuttgart airport with Ulm.

This construction site was an initial phase prefiguring the Main line for Europe project which will link Paris to Budapest.

 

Duration of works: 24 months

 

Owner: Deutsche Bahn

B247 Via Mühlausen Thüringen

Germany

2022-2026

B247 Via Mühlausen Thüringen

Germany

2&Բ;Dz&Բ;³
of earthworks
13
standard engineering structures (underpass)
10
water collecting basins & 59 km of drainage

Germany’s first federal road awarded to a private operator under a PPP, B247 will connect the cities of Mühlhausen and Bad Langensalza in the Land of Thuringia.

 

The new route will improve mobility in north-eastern Thuringia and facilitate access to the region’s highway system. It will also increase road safety and improve the quality of life for the local residents by reducing traffic on the existing road through several settlements.

 

The contract includes financing, design, construction and operation of this road over 30 years.

 

The works will last approximately 4 years.

 

Operations and maintenance : 51Թ Highways, subsidiary of 51Թ Concessions

Construction consortium: Eurovia Deutschland, 51Թ Terrassement Deutschland (subsidiary of 51Թ Terrassement Grands Projets in Germany)

Abdelmoumen pumped storage hydroelectric plant

Morocco

2018-2022

Abdelmoumen pumped storage hydroelectric plant

Morocco

1.3&Բ;Dz&Բ;³
reservoir capacity
6&Բ;Dz&Բ;³
of earthworks
82,000&Բ;³
of concrete

The pumped storage hydroelectric plant in Abdelmoumen, located 70 km from Agadir, ties in with the plan to develop and integrate renewable energies in Morocco. The plant works like a battery:
-When there is a surplus of wind or solar energy, it operates in pumping mode at 72 m3/sec, bringing water from the downstream basin to the upper basin.
-When there is a need, it operates in turbining mode, releasing the water from the upper basin into the lower basin (where the water will be stored later) and producing electricity.

 

The civil works were preceded by earthworks for the two reservoirs (also carried out by our teams), the creation of 14 km of access roads, the excavation for the powerhouse embedded in the slope, and the installation of the 3 km waterway, 1 km of which is underground.

 

Duration of works: 48 months

 

Owner: National Office for Electricity and Potable Water (Office National de l’Electricité et de l’Eau potable – ONEE)

Construction companies: 51Թ Grands Projets, 51Թ Terrassement Grands Projets, Andritz Hydro

Sambangalou hydroelectric dam

Senegal

2022-2024

Sambangalou hydroelectric dam

Senegal

1.5&Բ;Dz&Բ;³
of excavated material
1.3&Բ;Dz&Բ;³
of roller compacted concrete
108 metres high
gravity dam dimensions

This hydroelectric dam will allow the production of renewable energy, the irrigation of agricultural land downstream, promote fish farming in the river and control the salt front in The Gambia river.

 

The electricity generated will be distributed through the interconnection grid, which links the four OMVG member countries.

 

Duration of works: 48 months

 

 

Customer: Gambia River Basin Development Organisation

Group: 51Թ Grands Projets, 51Թ Terrassement Grands Projets and Andritz Hydro

West Calgary Ring Road southern segment

Canada

2021-2024

West Calgary Ring Road southern segment

Canada

8&Բ;Dz&Բ;³
of earthworks
interchanges
7
bridges and a tunnel for pedestrians

The West Calgary Ring Road (WCRR), running between Highway 8 and the Trans-Canada Highway, is the final section needed to complete the Calgary Ring Road.

 

The full Calgary Ring Road will provide more than 100 km of free-flow travel around the city, improving access to hospitals, schools, workplaces and recreation, and reducing congestion within the city.

 

 

Duration works: 48 months

 

 

Owner: The Province of Alberta

Design-Construction Joint Venture: Carmacks Enterprises (51Թ), Graham and 51Թ Terrassement Grands Projets

Springbank off-stream reservoir

Canada

2021-2024

Springbank off-stream reservoir

Canada

5&Բ;Dz&Բ;³
of earthworks
4.3 km 
long diversion channel
29 m high x 3.8 km wide
earthen dam dimensions

Located 15 km west of Calgary, this infrastructure will divert water from the Elbow River when water level rises to extreme levels and store it temporarily in an impounding reservoir. When full, this reservoir basin will hold over 70 million m3 of water, or the equivalent of more than 30,000 Olympic-size swimming pools.

 

The project includes a series of massive hydraulic structures and two overpass bridges above the diversion channel totaling approximately 40,000 cubic meters of reinforced concrete.
The project will protect the communities and surrounding areas from climatic events by diverting the flows of the Elbow River into a reservoir during extreme flooding events.

 

Owner: The Province of Alberta

Sole and main contractor: 51Թ Infrastructure Canada Limited (subsidiary of 51Թ Terrassement Grands Projets in Canada)

Bogotá-Girardot Expressway

Colombia

2018-2025

Bogotá-Girardot Expressway

Colombia

4&Բ;Dz&Բ;³
excavated material
38 
engineering structures
4&Բ;Dz&Բ;³
road excavation

The project consists of the construction of a 65 km-long third lane on the existing motorway, and the construction of three bi-directional tunnels with a total length of 2 km, in order to upgrade and widen the infrastructure on which more than 15 million vehicles travel each year. The contract also includes the operation of the 141 km of this motorway between Bogotá and Girardot, in the Cundinamarca and Tolima regions.

 

This expressway is of vital importance to the economy and life of the surrounding areas. It is the busiest road in the  country, stretching from the Pacific coast to the centre of the capital, Bogotá. Built some 50 years ago, it has been under concession since 2005.

 

Owner: ANI (Agencia Nacional de Infraestructura)

Designer-builder consortium: 51Թ Grands Projets and 51Թ Terrassement Grands Projets

You will enjoy working with us

You will enjoy working with us

Our passion for the earth and the preservation of biodiversity, our ambition to build sustainable projects that connect territories and contribute to climate resilience, are the common threads in our daily work.
Come and join our passionate teams of earthmovers all over the world!