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
First Welland Canal along the same route four days later. As mentioned before, the route to Lake Erie afforded by the canal, following the Welland and Niagara Rivers, was difficult and slow. The Feeder connected directly to Lake Erie, but it was long, and, not intended as a ship canal, of insufficient capacity. Over the course of the canal's first full navigation season in 1830, it became evident that a more direct route was necessary. In March 1831, a location called Gravelly Bay (now Port Colborne) was chosen as the new Lake Erie terminus for the canal. It was one of the closest