The Chona (; , Çuona) is a river in the Sakha Republic (Yakutia) and Irkutsk Oblast, Russia. It is a right hand tributary of the Vilyuy, and is long, with a drainage basin of . The Russian Geographical Society organized an expedition in 1853–55 to survey the orography, geology and population of the Vilyuy and Chona basins. Course The river begins in the Lena Plateau, part of the Central Siberian Plateau, at an elevation of . It flows roughly northeastwards forming rapids which make the river not navigable. The lowest of its course were flooded by the Vilyuy Reservoir after the Vilyuy Dam was built in 1967. The river freezes between October and late May. The main tributaries of the Chona are the Vakunayka on the right and the Dekimde on the left. There are no permanent settlements by the Chona. See also List of rivers of Russia References External links Geography - Yakutia Organized Rivers of Irkutsk Oblast Rivers of the Sakha Republic