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Pont Saint-Louis-de-Gonzague (Saint-Louis-de-Gonzague Bridge)

Pont Saint-Louis-de-Gonzague (Saint-Louis-de-Gonzague Bridge)

Primary Photographer(s): Nathan Holth

Bridge Documented: July 4, 2019

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Facility Carried / Feature Intersected
Rue du Pont, Boulevard Pie-XII Over Canal de Beauharnois
Saint-Louis-de-Gonzague: Montérégie, Québec: Canada
Structure Type
Metal 8 Panel Rivet-Connected Parker Through Truss, Movable: Vertical Lift (Span Drive) and Approach Spans: Metal Deck Girder, Fixed
Construction Date and Builder / Engineer
1957 By Builder/Contractor: Dominion Bridge Company of Montréal, Québec
Rehabilitation Date
Not Available or Not Applicable
Main Span Length
220.0 Feet (67.1 Meters)
Structure Length
3,182.0 Feet (969.9 Meters)
Roadway Width
Not Available
1 Main Span(s) and 29 Approach Span(s)
Inventory Number
Not Applicable

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Bridge Documentation

One of two vertical lift bridges built on this canal. The main lift span was built in 1957 but reportedly at least some parts of the approach spans date to 1932, although it appears the highway deck is supported by modern steel girders on the approach. It is possible the piers date to 1932. It appears in the 1930s this was built as an all-fixed bridge with anticipation of adding the lift span, which happened in 1957. Wikipedia reports a span length of 361 feet however when measured in Google Maps (which has shown to be surprisingly accurate) the span length appears to be only 215-230 feet. Dominion Structural Steel was the contractor for the superstructure, and Canada Iron Foundries was the mechanical contractor. The bridge originally carried both highway and railway on its deck. Sometime in the 1990s the approaches were rebuilt. Canadian National Railways had abandoned its track from Valleyfield to Cantic (close to the border) and Hydro-Québec, as the owner, decided to remove the railway part and widen the highway, resulting in that project.

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Above: Historical photo showing bridge construction.


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