The heart of these plants is the Valle di Lei reservoir, with a capacity of 197 million cubic metres of water. The water is held back by an arch dam with a maximum height of 138 metres and a crown length of 635 metres. Virtually the entire reservoir – including the natural catchment area where around one third of the reservoir’s 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.
Facts & figures
Plant type:
Storage power plant
Location:
Sils, Thusis, Bärenburg, Ferrera, Switzerlan
Number of turbines:
Ferrera: 3 Francis turbines / Bärenburg: 4 Francis turbines / Sils: 4 Francis turbines / Thusis: 2 Francis turbines
Capacity:
645 MW
Shareholding:
9.28 %
Commissioning:
1963
Average annual production:
1500 GWh
Guided tours:
Yes
Status:
In service