Vallée du Garon Tourisme
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The Gier Aqueduct

This roman aqueduct, which was collecting water from the Gier river in Saint-Chamond (from a mountain range called “Le Pilat”, to the south-west of Lyon), transported it along 86 kilometers to Fourviere. Built between the the 1st and the 2nd century AD, this aqueduct supplied Lyon (capital of the Gauls, also called “Lugdunum” at this time) with water.

Several remains are still visible nowadays, such as in the towns of Brignais and Chaponost.

Practical Informations

In order to freely explore the remains of the Gier Aqueduct, you may follow the marked hiking itineraries. The document « A la découverte de l’Aqueduc romain du Gier », published by the Syndicat Intercommunal de l’Aqueduc Romain du Gier, is also at your disposal at the Tourist Office (in French), along with a leaflet which presents the site in English.

Download it

The remains

The Gier Aqueduct

”Site du Plat de l’Air” - the Yzeron river siphon It is the longest section of aqueduct in France. 72 arches are still standing.
The site is a French “Monument Historique”*
The Aqueduct Festival is held in this magnificent setting the last weekend of June each year (theatre, music…).

Few words about the “Monuments Historiques” in France * : to protect the monuments that are interesting from a historical, artistic or architectural point of view, there are two administrative procedures. The administration can list a building or a site as “Monument Historique”. It is the highest level of protection.The second level is to record the monument on a specific list called “l’Inventaire des Monuments Historiques”.

The Gier Aqueduct
The remains of a manhole
In order to preserve it, a manhole of the aqueduct, which was used for its maintenance, was restored and enhanced. (Amable Audin Street).

Other remains
Other remains include a siphon at the bottom of the valley (Vallée en Barret) and at the “Gagère”, the walls and arches of the “Côte de l'Air” and of the “Colombe”, and the Madone roundabout. The aqueduct crosses 6 kilometers of the town, mostly underground.

The Gier Aqueduct

The Garon Valley siphon
The arches of the siphon bridge, on which the lead pipes passed, are visible.

aqueduct_leaflet.pdf Aqueduct-leaflet.pdf  (5.94 Mo)