Alpiq in: Europe

Hinterrhein storage power stations

Stausee Valle di Lei

The heart of these plants is the Valle di Lei reservoir, with capacity for 197 million cubic meters of water. The water is dammed by an arch dam at a maximum height of 138 meters and a crown length of 635 meters. Virtually the entire reservoir – including the natural catchment area where around one third of the dammed water originates – is located in Italy. Around two thirds of the water is fed from the Avers, Madris and Niemet valleys or pumped up from the Ferrera station.

Storage Power Plants


Sils, Thusis, Bärenburg, Ferrera, GR

Ferrera: 3 Francis turbines / Bärenburg: 4 Francis turbines / Sils: 4 Francis turbines / Thusis: 2 Francis turbines

744 MW

Alpiq: 9.3 %


1,368 GWh


in service