The results
The program was carried out in four phases, according to the priority of the sectors. Between 2017 and 2023, 86 sectors, representing approximately 30 linear km, were mapped. These studies made it possible to identify in fine just over 700 buildings on display and 75 sections of road (departmental and municipal roads and hiking trails combined). More particularly, during the last phase, 15 sectors were treated (approximately 4 linear km of wall) spread over the municipalities of Cailly-sur-Eure, La Vacherie, Normanville, Saint-Philbert-sur-Risle, Saint-Samson -de-la-Roque and Port-Mort. Each site was the subject of a diagnosis, modeling and rockfall and landslide hazard maps. The exposed issues (“Buildings” and “Road sections”), located in low, medium and high hazard zones, were identified for each of the sites. Ultimately, this approach made it possible to identify:
- 14 buildings and 4 road sections in high hazard zones;
- 13 buildings and 5 road sections in medium hazard zone.
Security recommendations, provided as an indication and based on the security objectives to be achieved, are proposed for sites affected by a high level of hazard in the presence of issues. They relate in particular to the management of attendance, the implementation of measures aimed at reducing hazards or even the implementation of safeguarding measures.
