Containerised trade at the Port of Montreal on the St Lawrence River is booming, while ports on the Great Lakes struggle to find a foothold in the market.

The Canadian blue-water port — just beyond the St Lawrence Seaway — is spending millions to almost double its seaborne container capacity.

The facility, which handled 1.15m teu during August, is building a CAD 950m ($744m) Contrecoeur boxship terminal that will add another 1.15m teu in capacity.

The port on the river's east bank will have two containership berths and is scheduled for completion in 2025.