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Lac du Vieux Émosson

Coordinates: 46°3′45″N 6°53′21″E / 46.06250°N 6.88917°E / 46.06250; 6.88917
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(Redirected from Lac du Vieux Emosson)

Lac du Vieux Émoson
Lac du Vieux Émoson is located in Canton of Valais
Lac du Vieux Émoson
Lac du Vieux Émoson
Lac du Vieux Émoson is located in Rhône-Alpes
Lac du Vieux Émoson
Lac du Vieux Émoson
Lac du Vieux Émoson is located in Switzerland
Lac du Vieux Émoson
Lac du Vieux Émoson
Lac du Vieux Émoson is located in France
Lac du Vieux Émoson
Lac du Vieux Émoson
Lac du Vieux Émoson is located in Alps
Lac du Vieux Émoson
Lac du Vieux Émoson
LocationValais
Coordinates46°3′45″N 6°53′21″E / 46.06250°N 6.88917°E / 46.06250; 6.88917
Catchment area4.6 km2 (1.8 sq mi)
Basin countriesSwitzerland
Max. length1.5 km (0.93 mi)
Surface area0.55 km2 (0.21 sq mi)
Max. depth42 m (138 ft)
Water volume13.8 million cubic metres (11,200 acre⋅ft)
Surface elevation2,205 m (7,234 ft)
Map

Lac du Vieux Émosson is a reservoir in Valais, Switzerland, in the municipality of Finhaut at an elevation of 2205 m. The lake drains into the reservoir Lac d'Émosson, 300 m below.

In September 2014, an increase of the dam by 21.5 meters was completed. The capacity of the lake was thus doubled to 25 million m³. The larger capacity is used for the Nant de Drance pumped storage plant, for which Lac du Vieux Emosson forms the upper basin and Emosson reservoir the lower basin.[1] The storage power plant went into operation on July 1, 2022, after 14 years of construction. The construction of the plant cost the equivalent of 2 billion euros. The installed capacity is 900 MW, and 20 GWh can be stored.[2]

The arch dam Vieux Émosson was completed in 1955. Efforts to raise the dam 20 m (66 ft) began in 2013. The lake forms the upper reservoir for the 900 MW Nant de Drance Hydropower Plant which began operations in 2022.[3]

See also

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References

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  1. ^ Archived (Date missing) at nant-de-drance.ch (Error: unknown archive URL)
  2. ^ "Nant de Drance: Neues Pumpspeicherkraftwerk in der Schweiz geht in Betrieb - Golem.de". golem.de. 6 July 2022. Retrieved 6 July 2022.
  3. ^ "20GWh pumped hydro energy storage plant starting operations in Switzerland". Energy Storage News. 29 June 2022. Retrieved 2 July 2022.