The Buthier is a mountain torrent in north-west Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

. A left tributary of the Dora Baltea

Dora Baltea

Dora Baltea or Doire Baltée , is a river in northern Italy. It is a left-hand tributary of the Po River, and is about 160 km long...

, its entire course lies within the Valpelline valley, in the region of Aosta Valley.

Course

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

Bionaz

-External links:...

, Oyace

Oyace

Oyace is a town and comune in the Aosta Valley region of north-western Italy....

, Valpelline, Roisan

Roisan

Roisan is a town and comune in the Aosta Valley region of north-western Italy....

 and finally Aosta

Aosta

Aosta is the principal city of the bilingual Aosta Valley in the Italian Alps, north-northwest of Turin. It is situated near the Italian entrance of the Mont Blanc Tunnel, at the confluence of the Buthier and the Dora Baltea, and at the junction of the Great and Little St. Bernard routes...

 where it joins the Dora Baltea

Dora Baltea

Dora Baltea or Doire Baltée , is a river in northern Italy. It is a left-hand tributary of the Po River, and is about 160 km long...

.

Tributaries

The principal tributaries from the left are:

• Rû Verdonaz
• Vessonaz;

and from the right:

• Ollomont
• Artanavaz.

Bridges

• Pont de Pierre
  Pont de Pierre (Aosta)
  The Pont de Pierre , meaning "Stone Bridge", is a Roman segmental arch bridge in the Italian city of Aosta in the Aosta Valley. The bridge crossed the Buthier about 600 m from the eastern exit of the Roman colony Augusta Praetoria; in later times the torrente changed its course, leaving the...
  
  , a Roman bridge
  Roman bridge
  Roman bridges, built by ancient Romans, were the first large and lasting bridges built. Roman bridges were built with stone and had the arch as its basic structure....
  
   from the time of Augustus
  Augustus
  Augustus ;23 September 63 BC – 19 August AD 14) is considered the first emperor of the Roman Empire, which he ruled alone from 27 BC until his death in 14 AD.The dates of his rule are contemporary dates; Augustus lived under two calendars, the Roman Republican until 45 BC, and the Julian...
  
  (r. 30 BC-14 AD)