Larocque Bridge, Railway and road bridge in Saint-Stanislas-de-Kostka, Canada.

The Larocque Bridge is a steel structure spanning the Beauharnois Canal in Saint-Stanislas-de-Kostka that carries both vehicle and train traffic. The bridge connects both sides of the waterway and enables continuous movement between the neighboring communities.

The bridge takes its name from chemin Larocque, the road leading to its access on the Salaberry-de-Valleyfield side, itself named for Charles Larocque, a merchant, forestry entrepreneur and founder of the Municipality of Saint-Louis-de-Gonzague. The span crosses the Beauharnois Canal, part of the St. Lawrence Seaway, and its central lift section rises to let ships through.

The bridge links communities on opposite sides of the waterway, enabling regular exchanges between residents and facilitating economic development in the surrounding municipalities.

The bridge carries Route 201 and Route 132, with two road lanes and a railway track; clearance is limited to 4.4 metres. The lift span rises as ships pass through the Beauharnois Canal, and the lift schedule is posted on the St. Lawrence Seaway website, though it is sometimes wrong. If the bridge is up, use the neighbouring Saint-Louis-de-Gonzague bridge, since the two are not synchronized.

The Larocque Bridge and the neighbouring Saint-Louis-de-Gonzague Bridge are nearly twins, but their lift spans are not synchronized. When one deck is raised for a ship on the Beauharnois Canal, users can cross on the other, a detail many drivers never notice.