Welcome to the Great Lakes St.
Lawrence Seaway System
St. Lawrence Seaway Closes 47th Navigation Season- The St. Lawrence Seaway officially closed for the season on December 29th, 2005, with the passage of the Transport Desgagnés tanker, Maria Desgagnés, through the St. Lambert Lock at 5:40 p.m.
A Vital Waterway - View our 10-minute online video of the Seaway.
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