Onega River traditionally explained as related to Finnish "Enojoki" - the main river, stream. In terms of both area of the basin and the average discharge, the Onega is the third river basin of the White Sea (behind the Northern Dvina and the Mezen. The river basin of the Onega is spread over the west of Arkhangelsk Oblast, north-west of Vologda Oblast, and also includes minor areas in the east of Republic of Karelia. The Onega basin includes some of the biggest lakes of Arkhangelsk and Vologda Oblasts, such as Lake Vozhe, Lake Lacha, Lake Lyokshmozero, Lake Kenozero, Lake Undozero, and Lake
Arkhangelsk Oblast the 1970s and is expected to become part of the Belkomur project — a railway line connecting Arkhangelsk via the Komi Republic with the Perm Krai and the Ural mountains. Almost the entire rail network belongs to the Northern Railway, which west of Onega connects to the Oktyabrskaya Railway. There is also a railway line from Severoonezhsk west to Yangory (an extension of the line from Puksa to Navolok), which belongs to the Department of Corrections. A big number of narrow gauge railways have been built in the 1950s and 1960s to facilitate the transport of timber, but since then