Sweco has been commissioned by the Stockholm County Council to design an 11-kilometer-long underground metro line from Kungsträdgården to Nacka and Gullmarsplan in Stockholm. The contract, which will be carried out in joint venture with Spanish consulting engineering company TYPSA, is valued at approximately SEK 500-600 million.

”This is one of the largest and most complex assignments in Sweco’s history. The initiative is a key component in the entire region’s development and will be a significant improvement to public transport,” says Åsa Bergman, President of Sweco Sweden.

Sweco will be responsible for planning and designing the new 11-kilometre-long underground rail line, which will be run in a rock tunnel underneath the Saltsjön Sea from Kungsträdgården to Nacka and Gullmarsplan. The assignment also includes the design of five new stations. Sweco will provide a wide range of expertise in areas spanning architecture and underground construction to rail technology.

“From a technical perspective, this assignment is one of a kind. It will be the first metro to run underneath the Saltsjön Sea, with a long rock tunnel and stations situated very deep underground. The result will be less stress on Slussen as a hub, stations with a large catchment area in southeast Stockholm, and an efficient connection to Stockholm Central Station,” says Johan Dozzi, President of Sweco Civil.

The new metro line is expected to open in 2025.