The D800 road also goes south from the village crossing the Rhône via the Gervans Hydro-electric Dam to join National Highway N7 on the left bank.

The commune is mainly forests in the hills and farmland in the valley and along the Rhône with the village spread along the D86.

[3] The Rhône forms the entire eastern border of the commune with the department of Drôme on the other side.

The village has seen many changes over time with the construction of the dam and the railway which resulted in numerous expropriations of land and the loss of local jobs.

A Roman road passed through the village at the place called impasse de l’Ancienne Voie (Ancient Way cul-de-sac) where there are Milliaria indicating distances in Roman miles (1 mile was equivalent to 1.475 kilometres).

[4] Two were still in place and on one of them is the inscription "Millia Passum XXXI" = 31 Roman miles, or 48 kilometres which is the distance between Arras and Vienne but they were moved and sealed into the entrance to the courtyard of the castle museum of Tournon-sur-Rhone in 1939 and can no longer be moved.

A stone dam was built on the Ozon to retain water (at a place called la Levée) over a canal 200 metres wide with an iron wheel measuring 6m in diameter with which the fall of Water could drive a geared system.

In 1935 the wheel was replaced by cylindrical machines and a diesel engine was also installed to ensure production even in times of low water.

After World War II, the growing of wheat decreased and new modern mills were built.

The structure was built on a layer of clay (called "blue earth") in order to cope with the frequent flooding of the Rhône and support water speeds up to 7500 m3/s.

To ensure protection against floods the turbines can rotate at high speed without generating electricity.

A project management structure allows it to work properly at low water: the reservoir level can be lowered to voluntarily make the turbines spin faster and produce more energy at a given time, especially during peak periods.

It is located on the top of a rocky outcrop overlooking the Rhône and the mouth of the valley of the Auzon.

It is possible that the site already played this role during Ancient Rome and the Romans would have used Arras as an aerarium (place to safeguard military treasure).

The French Revolution abolished all tolls which removed any interest in the building and accelerated its erosion.

In 987 it was returned with the parish to the Abbey of Saint-Bernard of Romans, then passed to the Prior of the island of Saint-Vallier, and later to the Canons of Saint-Ruff (Diocese of Vienne) and the Archpriests of Saint-Félicien.

In 1833 the bell tower was rebuilt with stone from the Guerrys quarry located one kilometre away on the old area of Ozon.