Alpiq in: Europe



Staumauer Salanfe

The reservoir collects water from the Salanfe and Saufla basins. The waters of the Saufla reach the reservoir via the natural gradient of a 4 kilometer-long tunnel. The pressure line between the reservoir and the Miéville power stations situated 1,472 meters lower down has a gradient of up to 95 percent.


Staumauer Hongrin

The Forces Motrices Hongrin-Léman (FMHL) Company was founded in 1963 with the purpose of creating a pumped storage hydroelectric facility. The main features of the project are the Hongrin dam and the two underground pumped storage power plants near Lake Geneva.



Before Cleuson-Dixence was built, approximately 2,200 hours were needed to empty the Grande Dixence dam, in other words, the turbines had to operate at full capacity 11 hours a day from October to April.


Engadine storage power stations

The Livigno reservoir is a model of international cooperation in the interests of electricity generation, while the Ova-Spin power station with its compensating basin shows how water extracted from the River Inn can be converted into valuable stored energy.


Zervreila storage power stations

Waters from various valleys are collected in the Zervreila reservoir above Vals near the Rheinwaldhorn, and used to generate electricity in three stages and in three stations. The annual production volume is sufficient to supply some 110,000 households with electricity.


Staumauer Serra

The company operates three power stations in Gondo, Gabi and Tannuwald, which harness the power of water from the Simplon massif to generate electricity. The Gabi and Tannuwald stations are remotely controlled from Gondo. Two thirds of the annual electricity production volume is generated in summer.   


Massa storage power station

The Gebidem dam is fed by Aletsch glacier water, which is very rich in sediment. The 55 m3/s turbined by the Bitsch power station contain between 10 and 13 kg of sand, or an average of almost 40 tons per hour.


Maggia storage power station

The Maggia power stations harness the power of water from the Maggia and Brenno basins, using the drop between the Gries reservoir and the lake of Langensee. The gross height of approximately 2200 meters is the highest gradient used in Switzerland by a chain of high-capacity 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.

Grande Dixence

Grande Dixence storage lake

The Grande Dixence facility collects the runoff from 35 glaciers in the canton of Valais. The jewel in the facility's crown is the Grande-Dixence dam, the highest gravity dam in the world. The water from the reservoir plummets down to the Fionnay and Nendaz power stations.


Gougra storage power station

The Gougra power station harnesses the power of water from Val d’Anniviers and the Turtmann Valley thanks primarily to the Moiry dam, built in 1954 above Grimentz. The dam is 148 meters high and 610 meters long. The water is fed from the reservoir to the power stations in Mottec, Vissoie and Chippis (Navizence).


Staumauer Emosson

Situated at an altitude of 1930 meters, the Emosson reservoir is partly fed by the waters of the Mont Blanc massif. Energy is generated in the Vallorcine and Martigny-La Bâtiaz stations located around 1,400 meters lower down. The water stored in the reservoir is sufficient to generate electricity to illuminate a city of 250,000 residents.


Blenio storage power station

The Blenio storage power station went into operation between 1959 and 1963. The Luzzone, Olivone and Biasca stations belong to this power plant. All facilities are remotely controlled and monitored from the command centre in Locarno. The concession runs until 2042.