Invitation to tender by negotiated procedure, deadline 18.06.2015, for construction of shafts and geotechnical exploration tunnel at Calmette prior to extension of Line 11 at Paris. Contract duration 11 months from award. Contact RATP in Paris, tel +33 158769379, fax +33 158769589, e-mail stephane.candellari@ratp.fr. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=189714-2015. Ref. MOP/HA 15-0091. 23/15.