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Nant de Drance is on track

Pumped-storage power plant in the Valais Alps

The work for the construction of the Nant de Drance (NdD) pumped-storage plant is proceeding according to plan. Concentration at present is on the boring of the access tunnels to the caverns. The tunnelling machine in the main tunnel from Châtelard has been going at full speed since March 2010. The team restarted the tunnelling from Emosson in the spring. The emptying of the Lac d’Emosson lake took place during the winter so that the excavation work near the water catchments could be done before the snow began to melt in spring.