Timeline

Heritage classified

Key figures

Origin and history

The suspension bridge of Chilhac, located in the commune of the same name in Haute-Loire (region Auvergne-Rhône-Alpes), was designed by the engineer Heurtault according to a project divided into two lots: the masonry and the apron. Open to traffic in March 1883, it illustrates a bold constructive technique for the time, allowing to cross wide spaces with a light structure, not sensitive to variations in the river bed. This type of work, although fragile, marked a decisive step in the evolution of bridges before being supplanted by concrete in the 20th century.

The bridge, located on departmental road 41, was listed as historical monuments by order of 2 October 2015. Its scarcity is due to the gradual disappearance of many suspended bridges, victims of their structural vulnerability or abandonment of this technique. Today, it is a remarkable industrial and technical heritage, bearing witness to a pivotal period in the history of French civil engineering. The building is owned by the Haute-Loire department.

Historical sources, including the work of Michel Barres published in 1992, highlight the pioneering role of these buildings in the development of local infrastructure. The Chilhac bridge is thus part of a line of innovations brought by engineers such as Ferdinand Arnodin, although the latter is not directly mentioned as an actor in this project. The technique of suspended bridges, although ephemeral, paved the way for modern crossing solutions, while leaving tangible traces like this listed monument.

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