Open invitation to tender, deadline 08.10.2015, for maintenance of technical installations in IJ tunnel (2 x 1,129 m) on S116 in Amsterdam. Duration of contract 24 months from award. Contact Amsterdam Municipality, attn Raymond van den Broeke, Amsterdam, tel +31 202511111, e-mail inkoopfysiek@amsterdam.nl. For electronic access to information and electronic submission of tenders https://www.tenderned.nl:443/tenderned-web/aankondiging/detail/samenvatting.xhtml?aankondigingId=63022. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=292539-2015. Ref.n. AI 2015-187. 35/15.