Lake Sukhodolskoye Lake Sukhodolskoye Lake Sukhodolskoye (; ) is a narrow 40 km long lake on the Karelian Isthmus located in Priozersky District of Leningrad Oblast, Russia. It is a part of the Vuoksi River basin, constituting its southern armlet, and drained by Burnaya River. Originally waters of Lake Suvanto (Lake Sukhodolskoye) quietly flowed into Vuoksi through a waterway at Kiviniemi. However, in 1818 the channel that had been dug to drain spring flood waters from Suvanto into Lake Ladoga unexpectedly turned into Taipaleenjoki (Burnaya River), which started draining Suvanto and decreased its level by 7 m. The Kiviniemi waterway dried out.
Lake Otradnoye Lake Otradnoye Lake Otradnoye (; ) is a lake on Karelian Isthmus, in Priozersky District of Leningrad Oblast, south of the town of Priozersk. The area of the lake is , and the area of its drainage basin is . The lake is the source of the Pionerka River (Pyhäjöki River) which flows to the west and drains into Lake Komsomolskoye. In its turn, Lake Komsomolskoye drains into Vesyolaya River, a tributary of the Vuoksi River. Whereas the lake belongs to the basin of Lake Ladoga which is located about to the east, its outflow runs to the west. The