Förvaltning för utbyggd tunnelbana (FUT).

Construction budget

EUR 1,300 million

Key facts

11 km of underground line in a tunnel under Saltsjön Sea from Kungsträdgården to Nacka and Gullmarsplan. 7 new underground stations, up to 100 metres deep.

Construction method: drilling and blasting with rock treatment (pre-grouting) to reduce water flow into the tunnel.

Geology: predominantly healthy granite substrate (RCS > 100 MPa) Occasional glacial deposits


Preliminary and detailed design; geotechnics, structures, electromechanical and railway systems (telecommunications, signalling and third rail), architecture, civil works, environmental consulting and vertical transportation.


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