the works concerned are located in the town of Arles (13200.The works are broken down into 1 firm slice and 3 optional tranches.- Firm tranche: Work to secure the urban dikes of the Vigueirat and raise the banks of the Common Trunk - TC and VIG zones,- optional tranche 1 (To1): Reinforcement of the Vigueirat dike at the siphon de la Flèche - FLE zone,- optional tranche 2 (To2): Carrossability of the Vigueirat dike between the North dam and the Crau bridge,-Optional tranche 3 (To3): Creation of a water intake at the intermarché right

work to secure the urban dikes of the Vigueirat and raise the banks of the common trunk