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St. Lawrence Seaway closes Jan. 12 after record-long shipping season

Posted 1/13/26

Crews with the St. Lawrence Seaway, working alongside the Canadian Coast Guard, operated around the clock to break ice and escort vessels through narrowing channels in the season’s final days.

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St. Lawrence Seaway closes Jan. 12 after record-long shipping season

Posted

Crews with the St. Lawrence Seaway, working alongside the Canadian Coast Guard, operated around the clock to break ice and escort vessels through narrowing channels in the season’s final days.

The commercial navigation season on the Montreal–Lake Ontario section officially ended Jan. 12, the latest closure since the Seaway opened in 1959.

Unusually cold temperatures and heavy ice created difficult conditions for ships and made it challenging to keep locks clear. As a result, about a dozen cargo vessels were delayed between Cape Vincent and Massena while awaiting passage toward Montreal and the Atlantic.

Officials said the persistent winter weather pushed Seaway operations weeks beyond the typical closing date before navigation was ultimately suspended.