The Brusio spiral viaduct forms part of the Bernina Railway section between Brusio and Campascio, and is approximately 55 kilometres (34 mi) from St. Moritz.
The stone-built viaduct was opened on 1 July 1908, upon the opening of the Tirano–Poschiavo section of the Bernina Railway. In 1943, the whole of that railway company was taken over by the Rhaetian Railway, which still owns and uses the spiral viaduct today.
The spiral viaduct is 110 metres (360 ft) long, has a horizontal radius of curvature of 70 metres (230 ft), a longitudinal slope of 7%, and is made up of nine spans, each 10 metres (33 ft) in length.
- Bernina Express
- Arch bridge
- Spiral (railway)
- Brusio (Rhaetian Railway station)
- Campascio (Rhaetian Railway station)
- Bernina Railway
- Rhaetian Railway
- Belloncle, Patrick , Le chemin de fer Rhétique, 1889-1999, Les Editions du Cabri, Switzerland, ISBN 2908816458 (French)
- Widmer, Markus, Eisenbahnbrücken, transpress, Stuttgart (Germany), ISBN 3344710192 (German)