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 channels of the Welland Canal and connected to "solid" ground only by the relatively small plug in the old canal along the Townline Tunnel approaches. A man-made geographic feature is the Merritt Island, a strip of land approximately five kilometres long and, in some places, less than 100 metres wide. The island was created when the alignment of the First Welland Canal was constructed basically parallel to the Welland River and since the abandonment of the old canal has been established as Merritt Park, featuring a popular four kilometre-long paved trail. Welland experiences a humid continental climate (Köppen "Dfb") typical