The Sous-Roche power plant

The electrical equipment for the tramway line was entrusted to the company Thomson-Houston. It was the first tramway in the Ain to be completely electric as from its construction. The plant required the construction of a dam, a 900-meter supply line, a steel and concrete penstock that fed, after a 40-meter drop, its two direct-current generators. The plant is still in use; it is automatically controlled from the Génissiat dam. The first storey, with access from the side of the building, was reserved for the housing of power plant guards.