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#1 Federal
Great Lakes St. Lawrence Seaway Performance
- Organization: Department of Transportation
- Dataset Last Updated: May 28, 2026
This dataset contains monthly performance statistics for the Great Lakes-St. Lawrence Seaway system.
- json
- xml
- csv
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: August 06, 2026 at 12:48 AM
#2 Federal
Great Lakes St. Lawrence Seaway Tonnage
- Organization: Department of Transportation
- Dataset Last Updated: April 27, 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.

Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: August 02, 2026 at 11:27 PM

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