“Tunnel Ostbahnhof” joint venture awarded contract for eastern section of the Second Core S-Bahn Route in Munich

Glattpark (Opfikon), 3 April 2025 – As part of the major Second Core S-Bahn Route project in Munich, Deutsche Bahn is awarding the “733 Tunnel Ostbahnhof” contract to the “Tunnel Ostbahnhof” joint venture, in which Implenia and HOCHTIEF each have a 50% stake. The contract, worth somewhere in the high hundreds of millions of euros to the joint venture, includes structural works for the Ostbahnhof stop and the tunnel tubes between Marienhof and Ostbahnhof. Construction work begins in June 2025 and is scheduled for completion by May 2033. 

Across a stretch of around three kilometres, the joint venture partners will build two traffic tunnels and a rescue gallery, the München-Ost underground station, eight connecting structures between the main tunnels, a junction structure, several galleries and shafts, as well as shell construction of a new underpass in the Ostbahnhof station. This will all require a wide range of skills in tunnel construction, special foundations and civil engineering. These demanding city-centre construction works present the joint venture partners with some special challenges, from both a technical and logistical point of view, especially since the work will be done while trains continue to travel through the busy Munich hub. Systematic use of BIM technology and proven Lean working methods will help keep the project running smoothly.

The new contract for the eastern section represents the continuation of a very successful ongoing collaboration: Implenia and HOCHTIEF have been working together on the Second Core S-Bahn Route in Munich since 2018 as part of the Marienhof joint venture that is building the central Marienhof station in the heart of the city. Implenia is the technical lead for the Marienhof joint venture, while HOCHTIEF is the technical lead for the Tunnel Ostbahnhof joint venture. In each case the other partner is taking the commercial lead.

Jens Vollmar, CEO of Implenia, is pleased about the new contract for the complex major project in the centre of Munich, which fits perfectly with the strategic focus of the construction and real estate service provider: “Maintaining and developing a functioning transport infrastructure is central to the quality of life in our cities. I’m very happy that Implenia, with its many years of experience and comprehensive expertise, is once again able to contribute actively to improving public transport in Munich.”

With around 840,000 passengers per day, the Munich S-Bahn is one of the largest local public transport systems in Germany. Opened in 1972, the 11.3 km long main line has reached its capacity limit, as all S-Bahn trains have to cross the city centre through a single tunnel. The approximately 11 km long Second Core Route is intended to relieve the existing line, serve as an alternative in the event of a fault and significantly shorten travel time from west to east by introducing a new express S-Bahn system.