Pont de l'île de Migneaux, Tied-arch bridge in Poissy, France

Pont de l'île de Migneaux is a tied-arch bridge in Poissy, France, made of reinforced concrete and stretching about 53 meters across the Seine. The structure has two curved concrete arches that rise above a road deck just over 5 meters wide, with narrow sidewalks and tall railings along the edges.

Léon Chouquet, a hotelier on the island, had a wooden footbridge built at his own expense; it was completed in autumn 1904 and checked by Prosper Leduc on 11 October 1904. By 1927 the owners' association judged it worn and degraded. In 1930 the SPIM chose a new crossing 200 metres downstream, and in August 1931 adopted Le Dantec's reinforced-concrete bow-string design for 720,000 francs, advised by the Charles Rabut firm.

The bridge is part of daily life on the island, linking homes and small local streets to the rest of Poissy without ceremony. People use it as an ordinary crossing, yet its low concrete arches also mark a familiar visual point where the island meets the river.

You can cross it on foot or by car, and the gentle slope of the deck makes the passage easy for cyclists and people with reduced mobility. Check the narrow sidewalks before stepping onto them, since they sit close to moving traffic and leave little room to pause.

The wooden walkway that preceded the bridge was finished in autumn 1904 and checked on 11 October 1904 by Prosper Leduc, a Ponts et Chaussées conductor. It was 66 metres long, 3 metres wide and 7.51 metres high at mid-span, and two trees blocking cars were cut down with the council's permission. The concrete bridge was placed 200 metres downstream of it.