Passerelle de l'Avre, Iron footbridge and aqueduct between Bois de Boulogne and Saint-Cloud, France
Passerelle de l'Avre is a footbridge and water conduit spanning the Seine between Boulogne-Billancourt and Saint-Cloud. It carries large pipes transporting water while pedestrians walk on separate pathways above.
The bridge was built in the late 1800s to transport water from the Avre into Paris while also providing a pedestrian crossing. It represents one of several infrastructure projects that linked Paris with its western suburban areas.
The bridge marks the westernmost point of Paris, where the quai du Président-Carnot meets the quai Marcel-Dassault on the Saint-Cloud side and the Grille-de-Saint-Cloud on the Boulogne side. Since the 2017 works removed the pipes, the deck has served only pedestrians, and the GR 1 long-distance trail crosses it when leaving the bois de Boulogne.
The walkway is about 6 metres wide and 9 metres above the Seine, reached on the Paris side by a staircase from the Grille-de-Saint-Cloud. On the Saint-Cloud side it meets the old Avre viaduct. Since 2017 the pipes have been removed and the deck is for pedestrians only; the GR 1 long-distance path uses it when leaving the Bois de Boulogne.
The 2017 renovation removed the water pipes and some arches, leaving the deck to pedestrians only. Since then the GR 1 long-distance trail crosses here when leaving the Bois de Boulogne, but reaching the forest from the eastern end still means crossing a main road.
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