The Prut river (also spelled in English Pruth; Ukrainian: Прут) is a 953 km (592 mi) long river in Eastern Europe. In part of its course it forms the Romania's border with Moldova and Ukraine.
It was known in antiquity as the Pyretus (Ancientgreek Πυρετός), Porata (possibly), Hierasus (Ιερασός) or Gerasius. It originates on the eastern slope of Mount Hoverla, in the Carpathian Mountains in Ukraine. The Prut flows southeast eventually joining the Danube river near Reni, east of Galaţi. Between 1918 and 1940 it was almost entirely in Greater Romania, while prior to that it served as a border between Romania and theRussian Empire. After the World War II the river once again demarcated a border, this time between Romania and the Soviet Union. Nowadays, for a length of 695 km it forms the border between Romania and Moldova. It has a hydrographic basin of 27,500 km2, of which 10,990 km2 are in Romania and 7,790 km2 in Moldova. The biggest city along its banks is Chernivtsi, Ukraine.
The Costeşti-Stînca/Stânca-Costești dam, operated jointly by Moldova and Romania, is built on the Pruth. There is also a Hydro-Electric Station in Snyatyn (Ukraine). Ships travel from the river's mouth to the city of Leova (southern Moldova). Near the city of Yaremche the river creates a waterfall Probiy which is eight meters high and has a slope of almost 45 degrees.