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    Phone: +41 62 286 71 11

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    Reinhold Frank

    Alpiq Holding Ltd.

    Head of Energy Central Europe

    Phone: +41 62 286 74 66

    Fax: +41 62 286 71 30

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    Antonio M. Taormina

    Alpiq Holding Ltd.

    Head of Energy Western Europe

    Phone: +41 62 286 75 59

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    Michael Wider

    Alpiq Suisse SA

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    1001 Lausanne

    Switzerland

    Phone: +41 21 341 21 11

    info.­lausanne@­alpiq.­com


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    Peter Heydecker

    Alpiq Suisse SA

    Head of Trading & Services

    Ch. de Mornex 10 / CP 570

    1001 Lausanne

    Switzerland

    Phone: +41 21 341 28 11

    Energy Services and AAT Group

    Herbert Niklaus

    Alpiq Holding Ltd.

    Head of Energy Services and AAT Group

    Phone: +41 62 286 70 08

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Alpiq in: Europe

Cleuson-Dixence

Staumauer 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 EOS 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 and Chandoline facilities.

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.

Hydropower

Storage Power Plants

Switzerland

Cleuson-Dixence, Switzerland

1269

Alpiq: 7/22

1998

Yes

in service