Open invitation to tender, deadline 13/08/2021, for the rehabilitation of the Gubrist tunnel, tubes 1 and 2 on the N01/38,42 Zurich northern ring road extension: main construction works (Lot 300). Duration of the contract is from 01/01/2022 to 31/12/2021. Contact Ofrou, Winterthur, tel +41 58 480 47 11, fax +41 58 480 47 90, email beschaffung.winterthur@astra.admin.ch. Further information on the tender, please click here (German) and/or here (French) and here. Ref. n. 100047. 12/21.
