Lac de Tseuzier

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Lac de Tseuzier
Bisse d'Ayent Tseuzier.jpg
Location: Valais
Tributaries: various mountain streams
Drain: La Liène
Larger places on the shore: no
Lac de Tseuzier (Canton of Valais)
Lac de Tseuzier
Coordinates 599377  /  133 272 coordinates: 46 ° 21 '3 "  N , 7 ° 25' 50"  O ; CH1903:  599377  /  one hundred thirty-three thousand two hundred seventy-two
Data on the structure
Lock type: Arch dam / earth embankment dam
Construction time: until 1957
Height of the barrier structure : 156 m / 20 m
Height above the river bed : 140 m
Height of the structure crown: 1777  m above sea level M.
Building volume: 300,000 m³ / 67,000 m³
Crown length: 256 m / 155 m
Operator: Electricité de la Lienne SA, Sion
Data on the reservoir
Water surface 85 ha
Reservoir length 1.3 km
Total storage space : 51 million m³
Catchment area 18.7 km²
Design flood : 60 m³ / s

Arch dam and earth embankment side by side

Map Lac de Tseuzier.png

The Lac de Tseuzier reservoir is located in the canton of Valais in the municipalities of Ayent and Icogne .

The lake can be reached via the Rhone Valley . From Sion you drive to the last larger town of Fortunau. Then a serpentine mountain road leads to the reservoir. You can also walk to the lake via the Rawilpass or the Schnidejoch from the canton of Bern .


The Zeuzier arch dam and the Proz-Riond earthfill dam were completed in 1957.


Originally, the Simmental motorway (at that time still the N6 national road ) was supposed to be led over the Rawil Pass into the Valais - a tunnel would have come close to the Tzeuzier dam. Since larger movements than expected occurred in the wall during exploratory drilling, not only was the lake level lowered; it was one of the reasons that the autobahn had been delayed for years until it was finally abandoned. With the Lötschberg base tunnel it became completely obsolete.

To the west of Lac de Tesuzier is the mountain Six des Eaux Froides (2905 m above sea level).

Web links

Individual evidence

  1. Six des Eaux Froides on ETHorama