Lake of Gruyère

Reservoir in Switzerland

46°39′N 7°06′E / 46.650°N 7.100°E / 46.650; 7.100TypereservoirPrimary inflowsSaane/Sarine, Sionge, JognePrimary outflowsSaane/SarineCatchment area954 km² (368 sq mi)Basin countriesSwitzerlandMax. length13.5 km (8.4 mi)Surface area9.60 km² (3.71 sq mi)Max. depth75 m (246 ft)Water volume220×10^⁶ m³ (180,000 acre⋅ft)Surface elevation677 m (2,221 ft) (max)IslandsIle d'Ogoz, four other isletsSettlementssee article Map

Lake of Gruyère (French: Lac de la Gruyère; German: Lac de la Gruyère or Greyerzersee) is an artificial lake in the La Gruyère region of the Canton of Fribourg, Switzerland.

The reservoir was formed between the cities of Bulle and Fribourg, by building the Rossens Dam on the Sarine river in 1948. The arch dam has a height of 83 m and a crest length of 320 m. The reservoir filled in about four months after completion. The dam is operated by the Groupe E SA.

The remains of the castle of Pont (or Pont-en-Ogoz) and a chapel are located on the Ile d'Ogoz, one of the five islets in the lake.

The "Viaduc du Lac de Gruyère" of the A12 motorway was built in the 1970s. The bridge has a total length of 2043 m and crosses three valleys, including two arms of the lake.

Villages and municipalities at the lake
Western shore	Eastern shore
Rossens Le Bry (Pont-en-Ogoz) Avry-devant-Pont (Pont-en-Ogoz) Guemfens (Pont-en-Ogoz) Vuippens (Marsens) Le Villars (Marsens) Champotey (Echarlens) Echarlens Morlon Le Vessieu (Morlon)	Pont-la-Ville La Roche Hauteville Corbières Villarvolard Villarbeney (Botterens) Botterens Broc

External links

Wikimedia Commons has media related to Lake of Gruyère.

Christophe Aeby: Lac de la Gruyère in German, French and Italian in the online Historical Dictionary of Switzerland.
Swissdams: Rossens
Rossens Dam at Structurae
Viaduc du Lac de Gruyère at Structurae
Swisscastles: Ogoz