It is about a seismically isolated railway viaduct with a total length of 800,0m, a width of 13,9m and a maximum pier height of 38,7m. The superstructure of concrete is continuous, single-cell box girder, longitudinally and transversely prestressed, constructed using the launching formwork system (“movable scaffolding”). Two single-action fluid viscous dampers at each abutment and pier to deck connection via lead-rubber bearings (LRB’s). Pile foundation.