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, Bridge 15 combined with the fact that the narrow, curving section of canal through Welland had no less than a total of six bridge crossings in just a few miles, led to the decision to inaugurate the Welland Canal Relocation Project. With the first sod turned in 1967, this project would relocate the canal to a much straighter alignment with no bridges about 2 km east of bridge 15. This route of the new canal would sever the CASO line. As part of the relocation project, this line, as well and the Canadian National Cayuga Subdivision, were rerouted through the new Townline