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Heritage classified

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Origin and history

The Charles Albert Bridge, commonly known as the Caille Bridge, is a steel cable suspension bridge located in Haute-Savoie, on horseback over the municipalities of Allonzier-la-Caille and Cruseilles. Designed to cross the River des Usses, it was inaugurated on 11 July 1839 under the impulse of the Duke of Savoie Charles-Albert, then king of Sardinia. Until its construction, the passage was performed by an ancient Roman bridge, of which remains remains. This 192-metre-long suspension bridge overlooks the 147-metre torrent and rests on four crenellated towers connected by steel cables.

The bridge was designed by engineers Émile Fulrand Belin and Paul-Léon Lehaître, marking a technical feat for the time. Its wooden deck, suspended by two groups of twelve cables, was initially dedicated to general traffic before being reserved for pedestrians and cyclists after the construction of a second bridge in 1929. The latter, the Caquot Bridge, made of unarmed concrete, was designed by engineer Albert Caquot and became a major road (D1201), now supporting around 25,000 vehicles a day.

Ranked a Historic Monument since 6 May 1966, the Caille Bridge has been the subject of several restoration campaigns, including one in 2007 to renovate its towers and structure. It was also the scene of significant events, such as the passage of the Tour de France in 1919 or the first car accident recorded in 1907. Today, the Haute-Savoie department, owner since 2006, is studying solutions to secure and enhance this iconic site, while preserving its historical and landscape character.

The bridge of La Caille is part of a rich historical landscape, with the remains of the Roman baths of La Caille below, showing an ancient occupation of the site. Although disused, these baths recall the strategic importance of this gorge, frequented since ancient times. The bridge, spectacular by its architecture, attracts constant tourist traffic, especially during the summer, and now benefits from development projects linked to the proximity of the A41 motorway.

Finally, the Caille Bridge illustrates the evolution of construction techniques in the 19th century, from Roman stone bridges to suspended metal structures. Its doubling in the 20th century by the Caquot Bridge reflects the growing need for mobility, while preserving the original work as a testimony of Savoyard industrial heritage. Recent works, such as the renovation of 2009-2010 (budget of €5 million), highlight the community's commitment to this monument, a symbol of engineering and local history.

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