2025 Seaway Notice: Maximum permissible draft - Montreal to Lake Ontario

Mariners are advised that as of March 31st, 2025, the maximum permissible draft in the Montreal-Lake Ontario section will be 80.8 dm (26’-6’’) for all ships.

The maximum permissible draft will remain at 80.8 dm (26’-6’’) for the Welland Canal for all ships.

Ships equipped with an approved and operational Draft Information System (DIS) will be permitted to transit at a draft of up to 7cm above the maximum allowable draft, at their own discretion, provided they meet the requirements set out in Section 29 of the Seaway Handbook Practices & Procedures.

Conditions will continue to be monitored closely and mariners will be promptly advised of any changes.

There will be zero tolerance for ships to transit at drafts in excess of those specified in this Notice.