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Buthier a aosta.jpg
Saumont dam, near Aosta
Origin Grandes Murailles glacier
Mouth Dora Baltea
Basin countries Italy
Length 40 km
Source elevation 3,000 m

The Buthier is a mountain torrent in north-west Italy. A left tributary of the Dora Baltea, its entire course lies within the Valpelline, a valley in the region of Aosta Valley.


One branch of the river is formed by the Tsa de Tsan glacier at an eleveation of c. 2,700m; a second by the Grandes Murailles glacier at c. 3,000 m. The river is then barred to form the Lago di Place-Moulin reservoir, after which it passes through the communes of Bionaz, Oyace, Valpelline, Roisan and finally Aosta where it joins the Dora Baltea.


The principal tributaries from the left are:

  • Rû Verdonaz
  • Vessonaz;

and from the right:

  • Ollomont
  • Artanavaz.



This article began as a translation from its counterpart in the Italian Wikipedia, specifically from this version

Coordinates: 45°43′56″N 7°20′25″E / 45.7321°N 7.3403°E / 45.7321; 7.3403