Langwieser Viaduct
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Langwieser Viaduct Langwieser Viadukt |
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View from the south
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| Coordinates | 46°49′03″N 09°42′18″E / 46.81750°N 9.70500°ECoordinates: 46°49′03″N 09°42′18″E / 46.81750°N 9.70500°E |
| Carries | Rhaetian Railway |
| Crosses | Plessur River, Sapünerbach |
| Locale | Langwies, Switzerland |
| Official name | Langwieser Viadukt |
| Owner | Rhaetian Railway |
| Maintained by | Rhaetian Railway |
| Characteristics | |
| Design | Arch |
| Material | Reinforced concrete |
| Total length | 284 m (932 ft) |
| Height | 62 m (203 ft) |
| Longest span | 100 m (330 ft) |
| History | |
| Construction start | 1912 |
| Construction end | 1914 |
| Opened | December 1914 |
The Langwieser Viaduct (or Langwies Viaduct; German: Langwieser Viadukt) is a single track reinforced concrete railway bridge spanning the Plessur River and the Sapünerbach, near Langwies, in the Canton of Graubünden, Switzerland.
Designed by , it was built between 1912 and 1914 by for the Chur–Arosa railway, and is now owned and used by the Rhaetian Railway.
It is also now listed as a Swiss heritage site of national significance as it is a pioneering reinforced concrete structure.
The viaduct is located on the Rhaetian Railway's metre gauge line from Chur to the holiday and recreation resort of Arosa (the Chur–Arosa line). It carries the railway line over the Plessur River valley, immediately up the line from Langwies station.
The line from Chur to Arosa was the last of the railway lines in the Rhaetian Railway's so-called core network to be built. The Arosa line also pioneered the use of new construction methods and techniques.
Erected between 1912 and 1914, the Langwieser Viaduct was the world's first railway bridge to be constructed of reinforced concrete, and at that time represented a significant breakthrough.
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