Open invitation to tender, deadline 21.03.2016, for the ventilation of safety tunnels in Rofla (1,017 m), Barenburg (1,028 m), Viamala (742 m) and Crapteig (2,171 m) on the N13, lot 21. Further information from http://www.simap.ch/shabforms/servlet/Search?NOTICE_NR=898139. Contact Ofrou, Bellinzona, tel +41 918206811, fax +41 918206890, e-mail acquistipubblici@astra.admin.ch. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=34204-2016. 05/16.
