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 and was also used by the Wabash Railway. Later, it became the Cayuga Subdivision of the Canadian National Railway. Lastly, the Niagara, St. Catharines and Toronto Railway provided electric interurban service from Port Colborne, Ontario to Thorold, Ontario via Welland. Passenger service ended in November 1959, but the tracks remained in freight use until 1981 when a trestle over the Welland River became unsafe and the line was removed from service. The relocation of the Welland Canal in the early 1970s caused massive changes in the local railway network. The new route of the canal was previously crossed by five