Open invitation to tender, deadline 21.02.2017, for maintenance and operation of existing road tunnels in the Principality of Asturias. The contract value is EUR920,308.00 excluding VAT, the duration will be 24 months. The last date for receipt of requests and accessing documents is 21.02.2017. Please contact Consejeria de Infrastructuras, attn Maria Teresa Fernandez Gayo, Oviedo, tel +34 985105742, fax +34 985105884, e-mail mariateresa.fernandezgayo@asturias.org. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=18717-2017. Ref. n. 17/006/CA-SE. 03/17.