The Buthier is a mountain torrent in north-west

Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...

. A

left bank In geography, a bank is the land alongside a body of water. Different structures are referred to as ''banks'' in different fields of geography. In limnology (the study of inland waters), a stream bank or river bank is the terrain alongsid ...

tributary of the

Dora Baltea The Dora Baltea () or Doire Baltée () is a river in the Aosta Valley and in Piedmont, in northwestern Italy. It is a left-hand tributary of the Po and is about long. Name The river's Latin name was ''Duria maior'', ''Duria Baltica'' or ''Duri ...

, its entire course lies within the Valpelline, a valley in the region of

Aosta Valley The Aosta Valley ( ; ; ; or ), officially the Autonomous Region of Aosta Valley, is a mountainous Regions of Italy#Autonomous regions with special statute, autonomous region in northwestern Italy. It is bordered by Auvergne-Rhône-Alpes, Fr ...

Course

One branch of the river is formed by the Tsa de Tsan Glacier at an elevation of about ; a second by the Grandes Murailles glacier at about . The river is then dammed to form the Place-Moulin Lake reservoir, after which it passes through the communes of Bionaz, Oyace, Valpelline, Roisan and finally

Aosta Aosta ( , , ; ; , or ; or ) is the principal city of the Aosta Valley, a bilingual Regions of Italy, region in the Italy, Italian Alps, north-northwest of Turin. It is situated near the Italian entrance of the Mont Blanc Tunnel and the G ...

where it joins the Dora Baltea.

Tributaries

The principal tributaries from the left are: * Rû Verdonaz * Vessonaz; and from the right: * Ollomont * Artanavaz.

Bridges

* Pont de Pierre, a Roman bridge from the time of

Augustus Gaius Julius Caesar Augustus (born Gaius Octavius; 23 September 63 BC – 19 August AD 14), also known as Octavian (), was the founder of the Roman Empire, who reigned as the first Roman emperor from 27 BC until his death in A ...

(r. 30 BC –14 AD)

Notes

:''This article began as a translation from its counterpart in the Italian Wikipedia, specifically fro
this version
' Rivers of Aosta Valley Rivers of Italy Rivers of the Alps {{Italy-river-stub