Sentinel.
Quote
Sectional barges working the St. Lawrence shoreline in Eastern Ontario

Service Area · Eastern Ontario

Built here.
Working here.

Sentinel barges are built in Cornwall, in Eastern Ontario on the St. Lawrence. Eastern Ontario marine contractors get factory-direct sections, local pickup, and a phone number that gets answered by the people who built the steel.

Overview

Built locally, in Cornwall.

Eastern Ontario has one of the densest concentrations of regional marine contractors in North America. Kehoe Marine Construction, Deep Shore Marine Contracting, Quality Marine, Dundee Marine, Slates Marine — the entire Thousand Islands corridor from Kingston east through Brockville, Prescott, Morrisburg, and Cornwall runs continuous seawall, dock, dredge, and waterfront-rehabilitation work for residential, municipal, and commercial customers.

Sentinel ships from Eastern Ontario, so for contractors in the region the build yard is a short truck haul away and local pickup is an option. Trucking and timing are confirmed with your quote, and you can reach the sales team by phone.

Beyond the Thousand Islands corridor, the Ottawa River, the Rideau system, the Bay of Quinte, and the inland lakes of the Madawaska and Algonquin regions are all served by the same shop on the same delivery economics.

Applications

What our barges do in this region

Seawall & shoreline work

Standard sections for crib repair, sheet-pile install, and rip-rap placement on the dense residential and commercial waterfronts of the St. Lawrence.

Boathouse & dock builds

Stable platforms for crib placement, post driving, and decking — from single-family boathouses to large marina expansions.

Maintenance dredging

Spudded floats for excavator-mounted dredging in shallow harbours, residential lifts, and small commercial slips.

Rideau & Ottawa River

Sections that fit into Parks Canada's lock systems and the heritage canals of the Rideau corridor for inspection and remediation work.

Cottage country logistics

Back Lake 8×20 sections that ship two high on a truck with no permits — perfect for landlocked Algonquin and Haliburton lakes.

Municipal water infrastructure

Platforms for intake repair, outfall maintenance, and shoreline pumping-station work for municipal water and wastewater utilities.

Why Sentinel

The factory is your neighbour.

Most marine contractors in Eastern Ontario have, at some point, lost a week waiting for a chartered barge from Quebec or upstate New York to clear customs, find a flatbed, and arrive on site. Owning sections eliminates that whole problem. We deliver from our Ontario shop on day one of mobilization, and if a section needs a repair, modification, or accessory added mid-season, the shop is an hour away.

For family-owned and mid-sized contractors specifically — the bulk of Eastern Ontario's marine sector — fleet ownership is also the cleanest answer to the rate-and-availability volatility of the regional charter market. Buy sections once, scale the deck to whatever the next residential, municipal, or commercial job needs, and stop competing with everyone else on the river for the same handful of chartered hulls.

Spec it for your job

Talk to us about a local build.

Drop by the shop in Eastern Ontario, or send us your project list — seawalls, dock builds, maintenance dredging, the typical Eastern Ontario mix. We'll spec a sectional fleet sized to your typical job, and arrange local pickup or delivery.

Spec an Eastern Ontario fleet →

Questions

Regional FAQ

Pricing, specs, lead times, and delivery — straight answers.

Can I pick up sections directly from the Ontario build yard?
Yes. Local Eastern Ontario contractors regularly arrange shop pickup with their own flatbed or a local trucker. We'll coordinate loadout, secure the sections, and get you on the road same-day.
How quickly can you deliver to a Thousand Islands or Kingston job site?
Single-day delivery is standard from our Ontario shop to anywhere in the Thousand Islands corridor, Kingston, or up the Rideau. Same-week delivery for Ottawa River, Bay of Quinte, and southern Algonquin sites.
Will the Back Lake 8×20 fit into my cottage-country lake?
That's exactly what it's built for. The 8 ft beam ships as standard freight, two high on a truck, no permits — so it reaches inland lakes that an oversized load can't. Once on the lake, the sections lock together into whatever deck size the job needs.
Do you supply other Eastern Ontario marine contractors?
Yes — extensively. We know the regional contractor community well and are happy to coordinate sections, schedules, or shared mobilizations where it makes sense for everyone.
Are your sections suitable for Parks Canada lock-system work on the Rideau?
Stamped engineering drawings ship with every section. Confirm site access, operating restrictions, and permit requirements with Parks Canada and your project engineer before deployment.
Thousand Islands, the St. Lawrence Seaway & the broader US East Coast
Built in Ontario, our sections truck and tow easily into the Great Lakes corridor, the US Eastern Seaboard, and out to Alberta oil sands reclaim work.
How does Barges for the Great Lakes & St. Lawrence Seaway relate to this region?
Great Lakes & St. Lawrence Seaway — Great Lakes barge · St. Lawrence Seaway barge · Welland Canal. Sections specified for this region can be re-coupled and moved to Barges for the Great Lakes & St. Lawrence Seaway, sharing fabrication, stamped engineering documentation, and intermodal-shipping logistics.
How does Barges shipped to the US Eastern Seaboard relate to this region?
US Eastern Seaboard contractors — East Coast barge · New York barge · Virginia barge. Sections specified for this region can be re-coupled and moved to Barges shipped to the US Eastern Seaboard, sharing fabrication, stamped engineering documentation, and intermodal-shipping logistics.
How does Tailings & reclaim barges for the Alberta Oil Sands relate to this region?
Alberta oil sands reclaim barges — Alberta oil sands barge · Fort McMurray barge · tailings pond barge. Sections specified for this region can be re-coupled and moved to Tailings & reclaim barges for the Alberta Oil Sands, sharing fabrication, stamped engineering documentation, and intermodal-shipping logistics.

Eastern Ontario regional network

Nearby barge regions for Eastern Ontario marine contractors

Thousand Islands, the St. Lawrence Seaway & the broader US East Coast

Built in Ontario, our sections truck and tow easily into the Great Lakes corridor, the US Eastern Seaboard, and out to Alberta oil sands reclaim work.

Related across the site

Keep reading