Hydroeletric power plants, undergroud works
Underground construction of a 900 MW pump storage power plant. The facility includes 2 water intake/restitutions into Lake Vieux-Emosson, 2 inlet tunnels with valve chambers, 2 waterfall wells, an underground power plant with 6 machine groups, Francis type, 150 MW each, an underground transformer station, a downstream valve chamber and 2 lower tunnels with outlet structures into Lake Emosson.
About CHF 1,900,000,000
Nant de Drance SA, Chemin du Gilloud 3, 1920 Martigny