Open invitation to tender, deadline 17/02/2022, for the refurbishment of the 8134 m Hauenstein base tunnel on the Basel–Olten railway line. Duration of the work is from 03.10.2022 to 30.09.2027. For further information click here (German) and/or here (French) and send the offer to SBB Infrastructure, Olten, email daniel.sesseli@sbb.ch. Contact SBB Infrastruktur, attn Markus Sägesser, Olten, email markus.saegesser@sbb.ch. Ref.n. 1003639. 48/21.
