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2026 – #6 Cancellation of Transit Restrictions at Opening

April 2, 2026

2026 – #5 Maximum Permissible Draft – Montreal to Lake Ontario

April 2, 2026

2026 – #7 Work on Valleyfield Bridge (Bridge 10) – April 11-12, 2026

April 2, 2026

2026 – #7 Revised Shallow Depths and Associated Restrictions in the Welland Canal

April 1, 2026

2026 Opening – Seaway Radio Message #9

April 1, 2026

2026 Opening – Seaway Radio Message #8

March 31, 2026

2026 – #6 West Flight Locks Out of Service

March 31, 2026

2026 Opening – Seaway Radio Message #7

March 30, 2026

2026 Opening – Seaway Radio Message #6

March 27, 2026

2026 Opening – Seaway Radio Message #5

March 26, 2026

2026 Opening – Seaway Radio Message #4

March 25, 2026

Trump’s Transportation Department Celebrates Opening Season for St. Lawrence Seaway

March 24, 2026

2026 Opening – Seaway Radio Message #3

March 24, 2026

2026 – #4 Transit Restrictions at Opening (Revised 2026/04/02)

March 23, 2026

The St. Lawrence Seaway Opens 68th Navigation Season, Celebrating Bi-national Leadership and a Vital Trade Corridor

March 23, 2026

2026 Opening – Seaway Radio Message #2

March 23, 2026

2026 – #6 Speed Restrictions – MLO Section

March 20, 2026

2026 Opening – Seaway Radio Message #1

March 20, 2026

2026 – #5 Bunkering and Transfer of Chemicals/Sludge at Wharf 2 & Wharf 16

March 19, 2026

2026 – #5 Operations of Bridges 7A & 7B

March 19, 2026

2026 – #4 Opening Ceremony at Lock 3 – March 24, 2026

March 19, 2026

2026 – #3 Personnel Interfaces with Ships at the Locks in the Welland Canal

March 19, 2026

2026 – #2 Ship Chandler Interfaces with Ships at the Wharves in the Welland Canal

March 19, 2026

2026 – #1 General Instructions

March 19, 2026

2026 – #4 Opening Ceremony at St. Lambert Lock – March 23, 2026

March 18, 2026

2026 – #3 General Notice

March 18, 2026

2026 – #3 Final Mooring Position Tolerances for Full Sized Ships Using HFM

March 18, 2026

2026 – #2 Interfaces with Ships at Canadian Locks Under MARSEC 1

March 18, 2026

2026 – #1 General Instructions

March 18, 2026

2026 – #2 Revised Ship Inspection Fees

March 6, 2026