Hydroelectric Power Plants in Switzerland - Valais

Ackersand-I
Location: Valais
Operator: EnAlpin AG
Configuration: 2 X 10 MW, 1 X 5 MW Pelton
Operation: 1909-1999
T/G supplier: Voest
Quick facts: This HPP on the Saaser Vispa is jointly-invested by EnAlpin, four local municipal governments, and Kraftwerke Mattmark. In May 2011, Andrtiz received an order for a new 14.8-MW unit to replace the two old machines.

Photograph courtesy of EnAlpin AG
Posted 2 Sep 2012

Ardon
Location: Valais
Operator: ESR - Energies Sion Region
Configuration: 2 X 25 MW Pelton
Operation: 1960
T/G supplier: Voest, BBC
EPC: Electrowatt
Quick facts: Ardon takes advantage of waterflows from a complex system of about a dozen dams and basins with a 14km pipeline and tunnel system. The operating company is Lizerne et Morge SA.

Photograph courtesy of ESR - Energies Sion Region
Posted 24 Aug 2014

Bieudron
Location: Valais
Operator: Alpiq
Configuration: 3 X 423 MW Pelton
Operation: 1998
T/G supplier: Sulzer, ABB
EPC: Grande Dixence SA, EOS
Quick facts: The turbines at Bieudron were the world's largest Pelton machines when completed. They run at a head of about 1,869m, also a workld record at the time. The total excavation volume was 7mn cubic meters for the galleries and the underground powerhouse. On 12 Dec 2000, the 4km penstock from Cleuson-Dixence ruptured at about elevation 1,234m. This catastophic accicdent released a very large flow of high-pressure water which caused considerable damage over a 100ha area and killed three persons. The penstock was rebuilt byy a consortium of AMC, Andritz Hydro, and MCE Industrietechnik Linz GmbH. The plant resumed full operation in Jan 2010. The cost of repairs and work to re-lay the penstock was around CHF 365mn.

Photograph courtesy of Alpiq
Posted 2 Sep 2012

Bramois
Location: Valais
Operator: FMV SA
Configuration: 4 X 6.75 MW Pelton
Operation: 1915
T/G supplier: Escher Wyss, Oerlikon
Quick facts: Bramois is on the Rhone River in Vex. It was originally built by AIAG - Aluminium Industrie AG to supply its elecrolysis works in Chippis about 13km away. A full rebuild is in its early stages.

Photograph by Optionmusique (Panoramio)
Posted 23 Nov 2013

Croix
Location: Valais
Operator: ESR - Energies Sion Region
Configuration: 2 X 33-MW Pelton
Operation: 1957
T/G supplier: Sulzer
EPC: Societe Suisse d'Electricite et de Traction
Quick facts: This HPP is part of a system on the Lienne River. Warter flows begin at the Zeuzier dam, drop through a 3.2km pipeline to a small HPP at Chamarin, then a further 1.6km pipleine to the Croix powerhouse. This is followed by a compensation basin, a 4.1km line to a connecction at Chelin and then to the St-Leonard HPP. The plant company Lienne SA was formed in Jun 1953 by Ville de Sion, IWB Industrielle Werke Basel AG, BKW FMB Energie SA, and Lonza SA. The Croix HPP has a 40 MVA switchyard.

Photograph courtesy of ESR - Energies Sion Region
Posted 24 Aug 2014

Gabi
Location: Valais
Operator: Energie Electrique du Simplon SA
Configuration: 2 X 5.5 MW Pelton, 1 X 150 kW Francis
Operation: 1958
T/G supplier: SZEW
Quick facts: EES has three hydro plants in the Zwischbergental near the Italian border. Gabi is at 1,300m altitutde and uses water from three intakes, Sengbach, Walibach and Alpjen.

Photograph courtesy of Alpiq
Posted 24 Nov 2013

Gondo
Location: Valais
Operator: Energie Electrique du Simplon SA
Configuration: 3 X 15 MW Pelton
Operation: 1952
T/G supplier: Voest, Alsthom-Jeumont
Quick facts: Gondo is at 800m altitutde and uses water from catchments at Zwischbergental and Gabi.

Photograph courtesy of Alpiq
Posted 24 Nov 2013

Grande Dixence Dam
Location: Valais
Operator: Grande Dixence SA
Quick facts: The Grande Dixence Dam is the tallest gravity dam in the world at 284m. It is 200m wide at the base with a crest length of 695m and a volume of 6mn m³. The reservoir feeds three of Switzerland's largest power stations, Bieudron (1,269 MW), Fionnay (321 MW), and Nendaz (408 MW), all with underground powerhouses discharging to the Rhone. These plants produce on average 2 TWh/yr. The dam also supports the 120-MW Chandoline HPP

Photograph courtesy of Swiss Committee on Dams
Posted 11 Feb 2004

Leteygeon
Location: Valais
Operator: ESR - Energies Sion Region
Configuration: 1 X 4.3-MW Pelton
Operation: 1977
T/G supplier: Bell, BBC
EPC: Electrowatt
Quick facts: This HPP is in Val d'Hérens. It went online in April 1977. Average production is 20.6 GWh/yr.

Photograph courtesy of ESR - Energies Sion Region
Posted 24 Aug 2014

Mauvoisin Dam
Location: Valais
Operator: Forces Motrices de Mauvoisin SA
Quick facts: Six Swiss power companies and a municipality are shareholders in FMM, whose main asset is the Mauvoisin Dam and reservoir. The 250m high dam was for a long period the second highest arch gravity dam in the world. There are three main power plants in the Mauvoisin complex. Chanrion (28 MW) uses the outflow of several glaciers above Lac de Mauvoisin. The first plant is Fionnay (138 MW). Water collected in the Fionnay basin is then directed through a 15km long pressure tunnel to Riddes power station in the Rhone valley (225 MW). Average energy production from the scheme is 1 TWh.

Photograph courtesy of Swiss Committee on Dams
Posted 11 Feb 2004

St-Leonard
Location: Valais
Operator: ESR - Energies Sion Region
Configuration: 2 X 17.3-MW Francis
Operation: 1957
T/G supplier: Charmilles, Oerlikon
EPC: Societe Suisse d'Electricite et de Traction
Quick facts: This HPP discharges to Col du Rawyl and then the Rhone. The controls systems were rebuilt from 1994-2000 along with the plant's 65kV switchyward. The modernization project cost CHF 35mn. Production from the Lienne system was 260 GWH in 2011/12.

Photograph courtesy of ESR - Energies Sion Region
Posted 24 Aug 2014

Stalden
Location: Valais
Operator: Kraftwerke Mattmark AG
Configuration: 2 X 92.5 MW Pelton
Operation: 1965
T/G supplier: SZEW, BBC
Quick facts: KVM was formed to build several hydropower plants associated with the Mattmarksee Reservoir in the Saas Valley. It is owned by Axpo Trading AG (38.8%), Centralschweizerische Kraftwerke AG (27.78%), BKW FMB Beteiligungen AG (11.1%), Stadt Sitten (11.11%), ewl Kraftwerke AG (5.56%), and Stadt Siders (5.56%). Stalden operates with a gross head of 1,029m and is connected at 220kV with a tie-line north to Chippis.

Photograph courtesy of Axpo
Posted 8 Jun 2014

   
Zermeiggern
Location: Valais
Operator: Kraftwerke Mattmark AG
Configuration: 2 X 37-MW Francis
Operation: 1964
T/G supplier: Escher Wyss, Oerlikon
Quick facts: Zermeiggern operates with a gross head of 459m.

Photograph courtesy of Axpo
Posted 8 Jun 2014

Abbreviations

Data: industcards, Platts UDI World Electric Power Plants Data Base

Updated 24-Aug-2014

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