EN |DE |FR |IT
Alpiq in: Europe

Cleuson-Dixence

Cleuson-Dixence

Cleuson

Production

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.

The new Cleuson-Dixence hydropower scheme enables production to be concentrated over just 1,000 hours, thus multiplying the Alpiq and Grande Dixence generating capacity by 2.5. It enables the output of a big nuclear power plant to be injected into the very high voltage grid in three minutes.


Main facilities

Built entirely underground between 1993 and 1998 by EOS and Grande Dixence at a cost of CHF 1.3 billion, the scheme comprises:

  • a new water intake in the Grande Dixence dam
  • 15.8 kilometres of collecting works
  • a surge tank dug out of the Dent-de-Nendaz mountainside
  • a 4.3 km steel-lined shaft
  • the Bieudron underground powerhouse

Bieudron power plant - alt. 481 m

3 Pelton turbines – Total capacity: 1269 MW (1395 MVA)
Gross head: 1883 m
380 kV grid connection

The Cleuson-Dixence complex is closely linked to the operating of the Grande-Dixence S.A facility.

After the accident at the Bieudron power station in December 2000, it stood idle for nine years. Following completion of the repair work, the Cleuson-Dixence complex was put back into service in January 2010.


Staumauer Grande Dixence

Grande Dixence dam - alt. 2365 m

Built: 1950 - 1961
Commissioned: 1961
Type: gravity dam
Height: 285 m
Crest: 700 m
Reservoir capacity: 400 mn. m3
Area: 4.04 km2
Catchment area: 46.3 km2


Experience the power of water

Discover the power plant in the hart of the Alps.


Storage Power Plants


Switzerland


Bieudron, VS


3 Pelton turbines


1,269 MW


Cleuson-Dixence Société simple: 15/22 Grande Dixence SA: 7/22 Alpiq Suisse SA


1998

2,200 GWh together with Grande Dixence SA


Yes


in service