Negotiated invitation to tender, deadline 17.07.2017, for the supply of External Controls on Civil Engineering and Waterproofing for Line 16 (35 km length of tunnels included) for the Grand Paris Express and its connections to L14, 15 and 17 lines and for the maintenance of the Aulnay site. The bid is composed of two lots. The duration of the contract is 85 months. Contact Societe du Grand Paris, Saint-Denis, tel +33 182462000, email marches-sgp@societedugrandparis.fr. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=202574-2017. Ref. n. 2017PN008. 22/17.