Invitation to tender using competitive dialogue, deadline 03.07.2012, for design and construction of 1.1 km-long underwater tunnel with approaches, total length 3 km, as part of proposed 17.5 km-long connection between Salamina and Perama in Piraeus prefecture. Further information, specs and docs from Ioanni Karnesi at EYDE/M-K EPP, Athens, tel +30 21069922-32, fax -68, websites www.ggsde.gr and www.ggde.gr, to whom tenders or requests to participate must be sent. Time limit for receipt of requests for documents, or for accessing documents: 22.06.2012. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=105929-2012. 14/12.