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 ship locks. Seven of the locks (Locks 1–7, the 'Lift' locks) are long and raise (or lower) passing ships by between each. The southernmost lock, (Lock 8 – the 'Guard' or 'Control' lock) is in length. The Garden City Skyway passes over the canal, restricting the maximum height of the masts of the ships allowed on this canal to . All other highway or railroad crossings of the Welland Canal are either movable bridges (of the vertical lift or bascule bridge types) or subterranean tunnels. The maximum permissible length of a ship in this canal is . It takes ships