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 13 By-Pass. Construction proceeded through the 1972 shipping season, and by the end of that season, work was close to completion. In the late evening hours of December 15, 1972, the Main Street Bridge raised to allow the passage of the Georgian Bay - officially the last ship through the city of Welland. In fact, the bridge was raised again the next day to allow a St. Lawrence Seaway service vessel to pass, but the Georgian Bay remains the official last passage under the bridge in most historical records. Following the closure of the canal at the end of the 1972