| Bridge Name: | Viaduc d'Ormaiztegi |
| Locale: | Ormaiztegi, Gipuzkoa, Basque Country, Spain |
| Designer: | Alexandre Lavalley |
| Design: | Multiple-span Deck truss bridge, Lattice girder, viaduct, bridge |
| Material: | wrought iron[1] |
| Length: | 291.5m (956.4feet) |
| Height: | 35m (115feet) |
| Spans: | 53.2m (174.5feet), 3×60.5m (198.5feet), 53.2m (174.5feet) |
| Life: | 155 years |
| Builder: | Société de construction des Batignolles |
| Complete: | 1863 |
| Inaugurated: | 1864 |
The Viaduc d'Ormaiztegi or Ormaiztegi Viaduct is a lattice girder viaduct in Ormaiztegi, Spain that was formerly used by a railroad to link a line from Madrid to Irun. It is now considered a historical monument.
The viaduct was designed by French engineer Alexandre Lavalley, and construction was completed in 1863.[2]
The viaduct was destroyed during the Spanish Civil War and was reconstructed in 1940.
In 1996, it ceased to be used and was considered obsolete. A modern viaduct was built nearby. To prevent its demolition, it was declared a historical monument, since after more than 130 years, it has been considered a symbol of Ormaiztegi.
The viaduct has a length of and a height of at its highest point.