Open invitation to tender, deadline 09/05/2025, for specialist services in geology, geotechnics and hydrogeology, for the studies and construction of the northern bypass of Twann/Douanne: a new 1925 m tunnel connecting and extending the existing Gleresse tunnel (Ligerz tunnel) on the current N05, between Twann/Douanne and Wingreis, where a new partial junction is planned. Click here for bid documents.Duraiton of contract from 01/09/2025 to 31/12/2038. Contact Ofrou, Estavayer-le-Lac, tel +41 58 461 87 11, email marchespublics.estavayer@astra.admin.ch. Visit https://ted.europa.eu/en/notice/-/detail/186280-2025. Ref. n. N05.72 MP-080012. 13/25.
