Lac de Salanfe

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Lac de Salanfe
View over the lake to the Tour Sallière.
View over the lake to the Tour Sallière.
Location: Canton of Valais
Tributaries: Salanfe , Saufla via inlet tunnels, various mountain streams
Drain: Salanfe
Larger places nearby: Salvan
Lac de Salanfe (Canton of Valais)
Lac de Salanfe
Coordinates 562 604  /  109858 coordinates: 46 ° 8 '21 "  N , 6 ° 57' 17"  O ; CH1903:  562 604  /  109858
Data on the structure
Lock type: Gravity dam
Construction time: 1947-1953
Height of the barrier structure : 52 m
Height above the river bed : 48 m
Building volume: 230 000  m³
Crown length: 616 m
Crown width: 5 m
Base width: 40 m
Slope slope on the air side : 74.2%
Slope slope on the water side : perpendicular
Power plant output: 70 MW
Operator: Salanfe SA, Vernayaz ( subsidiary of Alpiq )
Data on the reservoir
Altitude (at congestion destination ) 1925.5  m above sea level M.
Water surface 1.85 km²
Reservoir length approx. 2 kmdep1
Reservoir width approx. 900 mdep1
Storage space 40 000 000  m³
Total storage space : 40 100 000  m³
Catchment area natural: 18.4 km²
total: 31.8 km²
Design flood : 12.2 m³ / s
Map Lac de Salanfe.png
Detailed map

The Lac de Salanfe is a reservoir in the municipality of Evionnaz in the canton of Valais in Switzerland . The lake is formed by the damming of the Salanfe , in addition, the water of the Saufla is fed from the neighboring valley via a four-kilometer tunnel.


Lac de Salanfe, video

The lake is framed by the Tour Sallière and the Dents du Midi .

A road leads from Martigny via Salvan to the campsite at Van d'en Haut . From there you can walk to the reservoir in about 1 1/2 hours.

The Cabane de Salanfe mountain inn and a small chapel are located by the dam .


Construction of the Salanfe gravity dam began in 1947 and was completed in 1953. Since then, visibly less water has flowed over the famous Pissevache waterfall near Vernayaz .

Salanfe storage power plant

The reservoir is part of the Salanfe power station, which is owned by Alpiq . The cavern headquarters is in the Rhone Valley near Miéville in the municipality of Vernayaz. In the headquarters, two Pelton turbines with a total output of 70 MW process the water from the reservoir. 110 GWh are generated annually.

The Salanfe reaches the reservoir naturally, while the water from the Saufla has to be lifted with two pumping stations into the gravity tunnel to the Lac de Salanfe. The Giétroz du Fond pumping station has an output of 960 kW and lifts a maximum of 0.6 m³ / s into the tunnel from an equalization basin of 20,000 m³, while the Clusanfe pumping station with an output of 760 kW lifts from an equalization basin of 5400 m³ maximum 2 m³ / s in the tunnel.


  • Salanfe SA: L'aménagement de la chute de Salanfe . In: Bulletin technique de la Suisse romande . tape 78 , no. 17 , 1952, doi : 10.5169 / seals-59002 (Salanfe power station).

Web links

Individual evidence

  1. a b c Salanfe storage power plant. Alpiq, accessed on April 17, 2019 .
  2. Vernayaz: Cascade de la Pissevache. Vernayaz municipality (French).;