Penstock

Going down towards the Jardin de Bardot, the circuit crosses the pipeline bringing water to the EDF hydroelectric power plant several times. Collected by the Marcillac la Croisille dam, the water is conveyed via a 4,7 km long underground tunnel and then by a penstock to the hydroelectric plant located in the Dordogne valley on the edge of the Chastang dam. The total drop is 234 m, giving an average annual output of 60 million kWh.