St. Lawrence Seaway
Sign in to saveAlso known as Saint Lawrence Seaway
major canal system connecting the Great Lakes to the Atlantic Ocean
Key facts
- Length
- 370 miles (600 km)
- Maximum boat length
- 740 ft 0 in (225.6 m)
- Maximum boat beam
- 78 ft 0 in (23.8 m)
- Maximum boat draft
- 12.5 m (downstream of Quebec City), 10.7 m (Quebec City to Deschaillons), 11.3 m (Deschaillons to Montreal), 8.2 m (upstream of Montreal)
- Maximum boat air draft
- 12 m
- Maximum height above sea level
- 570 ft (170 m)
- Status
- Open
- Date of first use
- April 25
- Start point
- Port Colborne, Ontario
- End point
- Montreal , Quebec
via Wikipedia infobox
Wikidata facts
- Instance of
- waterway
- Named after
- St. Lawrence River
- Country
- Canada
- Located in
- Quebec
- Image
- St lawrence seaway.jpeg
- Length
- 370
- Connects with
- Great Lakes Waterway
Show 5 more facts
- Commons category
- Saint Lawrence Seaway
- topic's main category
- Category:Saint Lawrence Seaway
- service entry
- 1959-04-25
- date of official opening
- 1959-06-26
- officially opened by
- Dwight D. Eisenhower
Sources (2)
via Wikidata · CC0
~27 min read
Encyclopedic overview
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The Eisenhower Locks in Massena, New York St. Lawrence Seaway St. Lawrence Seaway separated navigation channel near Montreal The St. Lawrence Seaway (French: la Voie Maritime du Saint-Laurent) is a system of rivers, locks, canals, and channels in Eastern Canada and the Northern United States that permits oceangoing vessels to travel from the Atlantic Ocean to the Great Lakes of North America, as far inland as Duluth, Minnesota, at the western end of Lake Superior. The seaway is named for the St. Lawrence River, which flows straight from Lake Ontario to the Atlantic Gulf of St. Lawrence. Legally, the seaway extends from Montreal, Quebec, to Lake Erie, and includes the Welland Canal. Ships from the Atlantic Ocean are able to reach ports in all five of the Great Lakes via the Great Lakes Waterway.
Excerpted from Wikipedia’s “St. Lawrence Seaway” article, available under the CC BY-SA 4.0 licence.
On the map
3 mapped locations