Welland Canal and crossings are numbered from north to south. The following illustration depicts the profile of the Welland Canal. The horizontal axis is the length of the canal. The vertical axis is the elevation of the canal segments above mean sea level. If assigned by the St. Lawrence Seaway Authority. The original bridges across the fourth canal were numbered in order. Numbering was not changed as bridges were removed. Welland Canal The Welland Canal is a ship canal in Ontario, Canada, connecting Lake Ontario and Lake Erie. It forms a key section of the St. Lawrence Seaway. Traversing the Niagara Peninsula
Welland Canal 6, 1932. Dredging to the planned 25 foot depth was not completed until 1935. The route was again changed north of St. Catharines, now running directly north to Port Weller. In this configuration, there are eight locks, seven at the Niagara Escarpment and the eighth, a guard lock, at Port Colborne to adjust with the varying water depth in Lake Erie. The depth was now , with locks long by wide. This canal is officially known now as the Welland Ship Canal. The Welland Canal's first "hands-free" vacuum mooring was tested in Lock 7 prior to 2014. Installation of the