sentences:  The locks were constructed at Shlisselburg and Novaya Ladoga to maintain the depth needed for navigation.Construction of the canal was completed on October 22, 1730, and in spring 1731 the first boats were able to sail along the canal between the Volkhov River and the Neva River (Ladoga Canal proper).It turned out that the canal had a depth of less than one metre, considerably less than envisioned by Peter I.