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 out of Welland, leading north to Thorold, St. Catharines and onwards via Queen Elizabeth Way. Port Colborne is linked to Welland by Highways 140 and 58. Port Colborne residents then can take the 406 further north. The Mid-Peninsula Highway, once constructed, can play an important role in the transportation patterns of Welland, as it might cross the Welland Canal along the Highway 58A corridor in the south of the city. Should that occur, Highway 406 will likely be extended to reach the new thoroughfare. Two of the three tunnels under the canal, Main Street Tunnel and Townline Tunnel, are located