Media release,

Implenia wins contract for Lot 3 of Line C of the Toulouse Metro

3D visualization of the tunnel model to Lot 3 of Line C of the Toulouse Metro (Image: ©Implenia).

Joint venture consisting of Implenia and Demathieu Bard Construction wins large and complex tunnelling project | Lot 3 of future Line C of the Toulouse Metro in France | Order volume of around EUR 166 million for Implenia

Glattpark (Opfikon), 13. February 2023 – A joint venture (JV) consisting of Implenia (50%) and Demathieu Bard Construction (50%) has been awarded the contract for Lot 3 of future Line C of the Toulouse Metro by Tisséo, the public transport authority for Greater Toulouse. Line C is scheduled to run from Colomiers to Labège from the end of 2028. The project will last 57 months and has a total budget of EUR 331.4 million. Implenia’s share of the contract is worth approximately EUR 166 million.

Lot 3 includes drilling 3,814 m of tunnel beneath a densely populated urban area, as well as civil engineering work for the construction of four underground stations at a depth of 24 to 39 m, plus three ancillary structures. The joint venture has proposed using the “Variable Density Conveyor” method, an innovative tunnelling solution that will help cope with the challenges presented by different soil conditions. BIM (Building Information Modeling) is being used for planning and executing the project.

The joint venture’s bid placed particular emphasis on sustainability: the use of fibre-reinforced concrete tubbings will keep the CO2 footprint of the project as low as possible, while the trees on the site will be protected and preserved throughout the entire construction period. In addition, 98% of the excavated material will be recycled.

Christian Späth, Head Division Civil Engineering at Implenia, is excited about the project: “Alongside the lots of the Grand Paris Express and TELT (Lyon-Turin), this is another large and complex infrastructure project for our team in France. It fits our strategy and is an ideal opportunity for us to contribute our many years of experience and our comprehensive expertise in tunnelling and associated civil engineering disciplines.”

Contact for media:

Corporate Communications, T +41 58 474 74 77, communication@implenia.com


Contact for Investors and Analysts:

Investor Relations, T +41 58 474 35 04, ir@implenia.com


Dates for investors:

1 March 2023: Annual results 2022, Analysts and Media Conference

28 March 2023: Annual General Meeting




As Switzerland’s leading construction and real estate service provider, Implenia develops and builds homes, workplaces and infrastructure for future generations in Switzerland and Germany. It also offers tunnelling and related infrastructure projects in further markets. Formed in 2006, the company can look back on around 150 years of construction tradition. Implenia brings together the know-how of its highly skilled development, planning and execution units under the umbrella of an integrated leading multinational construction and real estate service provider. With its broad offering and the expertise of its specialists, the Group realises large, complex projects and provides client-centric support across the entire life cycle of a building or structure. It focuses on client needs and on striking a sustainable balance between commercial success and social and environmental responsibility. Implenia, with its headquarters in Opfikon near Zurich, employs more than 7,700 people across Europe and posted revenue of CHF 3.8 billion in 2021. The company is listed on the SIX Swiss Exchange (IMPN, CH0023868554). More information can be found at implenia.com.