The St. Lawrence Seaway Development Corporation celebrated its 50th anniversary in 2009. The Seaway system was constructed as a commercial shipping channel from the Great Lakes to the Atlantic Ocean and back. This enabled world products to get to the interior of the United States more easily.
The Eisenhower Lock is the first U.S. operated lock in a series of locks along the St. Lawrence River which are controlled by the U.S. and Canada. Between Montreal, Quebec and Lake Ontario there are five Canadian and two U.S locks. Total from Montreal to Distance from the Atlantic Ocean to Duluth, Minnesota on Lake Superior is 2,038 nautical miles, which is equivalent to 2,342 miles or 3,700 km. It takes a ship on average just over 5 days to travel from Duluth to Montreal. From the Port of Ogdensburg in St. Lawrence County, the time to get to Montreal is only about 16 hours.
How Does a Lock Work?
There are two locks in St. Lawrence County: the Eisenhower, which includes a visitor center for people to get a close up view, and the Snell Lock. They are both located on the Wiley-Dondero Canal, which is about 8 nautical miles and are gravity fed.
A ship enters the lock. The doors are closed and then water is either fed in or drained out depending on whether the ship is bound up river or down. Once the level of the water is leveled, the ship exits.