Editing St. Lawrence Seaway (section)

==Map==
''Map of the world Great Lakes and the St. Lawrence Seaway from 1959,'' depicting the entire length beginning at the [[Gulf of St. Lawrence]] in the east to the westernmost terminus at Lake Superior.
[[File:Great Lakes and St. Lawrence Seaway map 1959.png|frameless|center|upright=3.65]]
[[File:St. Lawrence Seaway locks and crossings.png|upright=3.65|thumb|center|[[Thousand Islands Bridge]], [[Ogdensburg-Prescott International Bridge]], [[Seaway International Bridge]], [[List of crossings of the St. Lawrence River and the Great Lakes#Upper St. Lawrence and Beauharnois Canal|Valleyfield Bridge]],  [[List of crossings of the St. Lawrence River and the Great Lakes#Upper St. Lawrence and Beauharnois Canal|St. Louis Bridge]], [[Champlain Bridge, Montreal (2019–present)|Champlain Bridge]] <br /> [[Lake Ontario]], [[Lake Saint Francis (Canada)|Lake Saint Francis]], [[Lake Saint-Louis]], [[Port of Montreal|Montreal Harbour]]]]