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Pont Honoré-Mercier (Honoré-Mercier Bridge)

Pont Honoré-Mercier (Honoré-Mercier Bridge)

Primary Photographer(s): Nathan Holth and Susie Babcock

Bridge Documented: July 4. 2010 and July 10, 2019

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Montréal and Kahnawake: Montréal, Québec and Montérégie, Québec: Canada
Structure Type
Metal Continuous (Arch and Suspended Deck) Rivet-Connected Through Truss, Fixed and Approach Spans: Metal 16 Panel Rivet-Connected Pennsylvania Through Truss, Fixed
Construction Date and Builder / Engineer
1934 By Builder/Contractor: Dominion Bridge Company of Montréal, Québec
Rehabilitation Date
Not Available or Not Applicable
Main Span Length
400.0 Feet (121.9 Meters)
Structure Length
6,342.5 Feet (1933.2 Meters)
Roadway Width
Not Available
3 Main Span(s)
Inventory Number
Not Applicable

Historic Significance Rating (HSR)
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Bridge Documentation

This is a unique pair of bridges with a variety of construction dates associated with the various parts of the bridges. As originally built in 1934, the bridge included the main span over the river, and was a single bridge only. The main span design appears to be an arched through truss design with a suspended deck. The end spans of the main unit follow a Warren truss configuration, while the center arched span follows a Pratt truss configuration. When the St. Lawrence Seaway was constructed, a southern extension of the bridge to pass over the South Shore Canal was required, and was completed in 1958, featuring a Pennsylvania through truss span over the canal. The through truss span over the canal is about 300 feet. Soon after, a second bridge was added over the river as well in 1963. The 1963 bridge carries northbound traffic, and the 1934 bridge carries southbound traffic. The second river bridge is nearly identical to the original bridge, however the newer bridge main span lacks the attractive arched portal bracing design of the original bridge. The Dominion Bridge Company reportedly built the original 1934 bridge.

View Historical Article About This Bridge

Above: View of the canal span.

Above: Elevation from northeast quadrant showing the canal bridge to the left and the main bridges to the right. Photo Credit: 郭良

Above: Historical photo showing the original bridge, before the canal construction.

Above: Historical photo showing construction of the second span.

Above: Historical photo showing construction of the second span.





Photo Galleries and Videos: Pont Honoré-Mercier (Honoré-Mercier Bridge)


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Bridge Photo-Documentation

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Bridge Photo-Documentation

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View Video

CarCam: Southbound Crossing

Full Motion Video
Note: The downloadable high quality version of this video (available on the video page) is well worth the download since it offers excellent 1080 HD detail and is vastly more impressive than the compressed streaming video. Streaming video of the bridge. Also includes a higher quality downloadable video for greater clarity or offline viewing.


Maps and Links: Pont Honoré-Mercier (Honoré-Mercier Bridge)

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