Saimaa Canal
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The Saimaa Canal is a transportation canal that connects lake Saimaa with the Gulf of Finland near Vyborg, Russia. The canal was built from 1845 to 1856 and opened on 7 September 1856.
It was overhauled and widened in 1963–1968. Wikipedia
Mean depth: 14.27′
End point: Gulf of Finland near Vyborg, Russia
Locks: 8
Maximum boat air draft: 24.5 m (80 ft)