Lot 1: OA1 : An underground car park with a covered area of ​​4800 m2 . Lot 2: OA2 : A large pier ( walkway on stilts for pedestrians ) of length 200 ml and surface area of ​​2200 m² and a cornice quay wall of length 170 ml. Lot 3: OA3 : Two piers on stilts (piers) each 20 m long and with an area each of 60 m 2 . Lot 4 : OA4 : A lake station with an area of ​​60 m2 at the Nautical Club on the banks of the North Lake of Tunis.