Open invitation to tender, deadline 01.04.2010, for design and construction of ventilation system in safety exits for Rofla (1,017 m), Barenburg (1,028 m), Viamala (742 m) and Crapteig (2,171 m) tunnels on N13. Contract duration 03.05.2010- 29.12.2017. Time limit for written questions is 04.03.2010 at http://www.simap.ch/shabforms/servlet/web/DocumentSearch?NOTICE_NR=457303.Contact USTRA, att.n N13 Sicherheitsstollen Graubunden, PV-Luftung, 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=054385-2010. 09/10.
