• Historic site and monument

Dams of Plan d'Amont and Plan d'Aval

Built between 1945 and 1956, these two dams are built into the Hydroelectric Complex Haute-Maurienne and participate in particular filling the reservoir of Mont Cenis.
They are located near the National Park of the Vanoise.

Historic site and monument Dams of Plan d'Amont and Plan d'Aval Aussois


Aussois (73500)
Animals allowed

Fed by mountain torrents, the Plan d'Amont and Plan d'Aval dams ensure the operation of the valley's power stations.
Plan d'Amont dam: this is a concrete gravity dam, 350 m long, made up of cells and buttresses, supported on the glacial lock which obstructs the valley. It holds 8,000,000 m3 of water, twice the volume of the Plan d'Aval, and collects all the water from the Saint-Benoît, thus capturing the catchment basin delimited by the Rateau d'Aussois, the Col de la Masse, the Pointe de l'Echelle, the Col d'Aussois, the Pointe de Labby and the western buttresses of the Dent Parrachée.
The water is turbined in a small power station called "Plan d'Aval", hidden at its foot, at the bottom of the talweg, before being discharged into the Plan d'Aval reservoir.
They are also an opportunity for a nice walk or a nice fishing trip. Public domain

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    Free access.


    Animals allowed
    Languages of documentation : French

    Beware of the boundaries of the Vanoise National Park as animals, even on a leash, are forbidden there.


    From 01/01 to 31/12, daily.
    Subject to snow conditions.

    Labels and rating

    20th C

    • Pets welcome
    • Picnic area
    • Car park


    73500 Aussois

    Accessible by a mountain road that is not accessible by bus - 7 km from the village.
    The access road is closed to traffic during the winter. However, access is possible for hikers (with snowshoes). Information on access conditions can be obtained from the Aussois Tourist Office.

    Information update on 29/11/2021 by Haute Maurienne Vanoise Tourisme