Lac du Vieux Emosson

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Lac du Vieux Emosson
Lac du Vieux Emosson.jpg
Location: Valais
Tributaries: various mountain streams
Drain: Nant de Drance
Larger places on the shore: no
Lac du Vieux Emosson (Canton of Valais)
Lac du Vieux Emosson
Coordinates 557507  /  101252 coordinates: 46 ° 3 '41 "  N , 6 ° 53' 22"  O ; CH1903:  557507  /  101252
Data on the structure
Lock type: Arch dam
Construction time: until 1955, increase until 2014
Height of the barrier structure : 45 m, since 2014 76.5 m
Height above the river bed : 42 m
Height of the structure crown: 2225  m
Building volume: 62 000  m³
Crown length: 170 m, since 2014 205 m
Operator: Swiss Federal Railways , Zollikofen
Data on the reservoir
Water surface 55 ha
Reservoir length 1.5 km
Total storage space : 13.8 million m³
Catchment area 4.6 km²
Design flood : 15 m³ / s
Map of Lac du Vieux Emosson.png
Lac du Vieux Emosson

The Lac du Vieux Emosson is located in the canton of Valais in the municipality of Finhaut . The first dam was built in 1955 by the SBB .

In September 2014, the dam wall was raised by 20 meters. The content of the lake was doubled to 25 million m³. The greater capacity of the pumped storage power station of Nant de Drance SA be used for which the Lac du Vieux Emosson forms the upper basin and the Emosson reservoir bottom cymbal.

The reservoir can be reached via the Lac d'Emosson, which is about 300 meters below, or on foot from Vallorcine in France via the Col des Corbeaux mule track .

Dinosaur tracks


On August 23, 1976, well-preserved footprints of archosaurs that lived 250 million years ago were discovered on the path to Col des Corbeaux at an altitude of 2,400 m . These tracks can be viewed in the summer after the snow melts.

Web links

Commons : Lac du Vieux Emosson  - collection of images, videos and audio files

Individual evidence

  1. Vieux-Emosson dam increased by 20 meters ( memento of the original from April 7, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , Alpiq media release September 25, 2014 @1@ 2Template: Webachiv / IABot /
  2. ^ Project Nant de Drance on the operator side