Lake Gruyère

from Wikipedia, the free encyclopedia
Lake Gruyère
Lac de la Gruyère
Lac de la Gruyère.jpg
Location: Canton of Friborg
Tributaries: Saane , Sionge , Jaunbach
Drain: Saane
Larger places on the shore: La Roche , Broc
Lake Gruyère (Canton of Friborg)
Lake Gruyère
Coordinates 573 963  /  169859 coordinates: 46 ° 40 '46 "  N , 7 ° 5' 54"  O ; CH1903:  573963  /  169859
Data on the structure
Lock type: Arch dam
Construction time: 1948
Height of the barrier structure : 83 m
Height above the river bed : 75 m
Height of the structure crown: 677  m above sea level M.
Crown length: 320 m
Data on the reservoir
Water surface 9.6 km²
Reservoir length 13.5 km
Storage space 180 000 000  m³
Total storage space : 200 000 000  m³
Catchment area 954 km²

Longest reservoir in Switzerland

FSO number : 9276
Map Lac de la Gruyère.png

The Gruyère , French Lac de la Gruyère , is a Swiss artificial lake , which in the canton of Friborg between cities Bulle and Friborg is. With a length of 13.5 km, it is the longest storage lake and at the same time the third largest reservoir in Switzerland in terms of storage volume . In the lake is the island Île d'Ogoz .


The Rossens arch dam , built under the direction of Henri Gicot , was completed in 1948. The preparatory work for the construction of the wall began in 1944. In 1945 the construction site was set up. Between 1946 and 1947, up to a thousand workers were employed on the construction site. The final construction price was 72 million Swiss francs (60 million francs were estimated).

Origin of the name

The Freiburg newspaper La Liberté carried out a survey for this purpose. 1447 replies were sent;

  • 535 Lac de Thusy
  • 478 Lac de la Gruyere
  • 434 Lac d'Ogoz

The most frequently mentioned proposal referred to the name of the stone arch bridge from 1544 over the Saane ( French: Pont de Thusy ), which was flooded by the lake. On July 6, 1948, the Council of State decided on the name Lac de la Gruyère .

On May 15, 1948, the flooding of the lake began, which was filled on September 20. The inauguration ceremony took place on October 14, 1948.

Dam wall



Web links

Commons : Lac de la Gruyère  - Collection of images, videos and audio files

Individual evidence

  1. List of Swiss bans (incomplete). In: swissdams. Swiss Dam Committee, accessed on May 9, 2020 .