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Origin and history

The bridge of the states of Languedoc, built in the 18th century at Ornaisons (Aude), was built to withstand the devastating floods of Orbieu, which had destroyed several previous bridges between Narbonne and Lézignan. Its funding was provided by the states of Languedoc, with insufficient local resources and the diocese of Narbonne. A first project in 1745, providing for a crossing at Villedaigne, was rejected because it extended the route. In March 1746, the project of engineer Carney, director of public works at Carcassonne, was approved: a stone bridge with two arches of full arch. Work began the same year under the direction of the Project Contractor.

From the beginning of the construction, structural problems arose: the central pile, designed to support the two arches, collapsed due to a soil less solid than expected. The project was modified to include three arches carried by two batteries. In August 1749, a fatal accident occurred during the collapse of a hanger, causing the death of three workers. In 1752, after Carney's death, François Garipuy took over and the bridge was completed. He was received on 18 November 1752 for a total cost of 180,000 pounds. The structure, 140 meters long, is distinguished by a central arch of 13 meters high and 42.90 meters of opening, contrasting with the lateral arches of 6 meters. The batteries, equipped with triangular fore-beeks and back-beeks, are surmounted by pyramidal chaperons. The arch keys of the central arch bear the arms of the states of Languedoc, crowned with a Comtal crown.

The bridge, inscribed in the Historic Monuments in 1951, illustrates the engineering of the eighteenth century in the face of geological and hydrological challenges. Its pronounced gradient (more than 6%) and its marked donkey back evoke medieval bridges, such as that of Saint-Affrique en Aveyron. In 2011, night lighting was installed to enhance this heritage. Located on the D24 departmental road, between Cruscades and Ornaisons, there remains a testimony of collective efforts to master the whims of Orbieu, a river with both sudden and devastating floods.

The materials used, device stone for arches and batteries, and bells for side walls, reflect the construction techniques of the time. The access lifts, 103 and 106 metres long, are separated from the abutments by discharge arches. The bridge, although designed for a river with a low flow, was dimensioned to withstand flooding, a compromise between practical utility and resilience to natural hazards. Its designation as Historic Monuments in 1951 underscores its historic and architectural importance.

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