Knowledge of the marine submersion reference hazard on the eastern part of TRI ST-Malo-Baie-du-Mont-St-Michel for the department of Ille and Vilaine.

This layer is the acquaintance of the marine reference reference on the eastern part of TRI ST-Malo-Baie-du-Mont-St-Michel for the department of Ille and Vilaine. Studies carried out in 2015 under the Flood Directive have drawn up risk maps which have been annexed to the Loire-Bretagne Basin Flood Risk Management Plan (PGRI Loire-Bretagne). In the eastern part of the area subject to flood risk in Baie-du-Mont-Saint-Michel, knowledge of risk areas has since improved and has taken into account up-to-date knowledge of the protection works and the topography of areas that were under development at Couesnon level. Based on these data, a knowledge of the marine submersion hazard was transmitted to the 6 coastal communes concerned on 19 September 2017: Pleine-Fougères, Roz-sur-Couesnon, Sougéal, St-Broladre, St-Georges-de-Gréhaigne and Val-Couesnon.