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Great Lakes St. Lawrence Seaway - U.S. Sector Reliability Rate

Published by Bureau of Transportation Statistics | Department of Transportation | Catalog Last Checked: August 02, 2026 at 11:24 PM | Dataset Last Updated: February 24, 2026
The Great Lakes St. Lawrence Seaway’s navigation season generally begins in late March and closes in late December. Opening and closing dates vary from year to year.

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