Ladoga Canal major canals constructed in Russia. It was one of the projects of Peter the Great, who ordered its construction in 1718. Rapid economic development in Russia required a significant expansion of routes, especially waterways. One part of the Vyshny Volochek waterway (1709) linking the Volga river to the Baltic Sea, passed through Lake Ladoga. The Ladoga section of the route was one of the most difficult and dangerous because the lake is prone to winds and storms which destroyed hundreds of cargo ships. Peter the Great decided to avoid the navigation in the huge and stormy lake by building a
Lake Ladoga due to uplift of the Baltic Shield in the north. It has been hypothesized, but not proven, that waters of the Litorina Sea, the next brackish-water stage of the Baltic, occasionally invaded Ladoga between 7,000 and 5,000 BP. Around 5,000 BP the waters of the Saimaa Lake penetrated Salpausselkä and formed a new outlet, River Vuoksi, entering Lake Ladoga in the northwestern corner and raising its level by 1–2 m. The River Neva originated when the Ladoga waters at last broke through the threshold at Porogi into the lower portions of Izhora River, then a tributary of the Gulf of