Open invitation to tender, deadline 02.03.2015, for the conclusion of the Riedberg tunnel (451.5 m, 587.15 m) excavation on A9 motorway. Duration of contract from 01.04.2015 to 31.12.2021. Contact Ofrou, Glis. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=022067-2015, http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=022066-2015 and www.a9-vs.ch. Ref. n. M05524. 04/15.
