The global project focuses on the works of security, conservation and restoration of the Viaduct des Rochers Noirs, a work classified as Historic Monuments since 2000 and labeled Heritage of the 20th century. However, in view of the deadline for the completion of the programming and in view of all the works to rehabilitate the viaduct, only the phases of work corresponding to the preparation of the site, the change of the suspension and the related external controls are the subject of this ERDF grant application. This operation aims to boost the tourist traffic of the site and also generate spin-offs on the surrounding territory.