The Alpes Maritimes department planned to rebuild the bridge over the Valmasque, which provides a crossing over the river for the RD635 road and the Chemin des Trois Moulins.
The original structure was a masonry arch bridge with a cross-section of 10.3 m², a concrete vault, return walls and a tympanum wall. This structure was damaged during the flood of 3 October 2015. The Department therefore wanted to rebuild it and bring it up to a hydraulic standard compatible with the 2015 flood, with a new, wider bridge to incorporate a shared space (for pedestrians and cyclists) and increase its capacity.
The opening of the new bridge is designed as an open concrete frame measuring 6 m (width) and 3.5 m (height) for a target flow rate of 66 m³/s with a clearance of 29 % for the section.
Dimensioning of riprap at the inlet and outlet of the structure (anti-scour device).