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Pont Jean-de-Lalande

Pont Masson

Pont Jean-de-Lalande

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: April 13, 2011 and July 4, 2019

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Key Facts

Facility Carried / Feature Intersected
Pedestrian Walkway Over Vieux Canal de Beauharnois
Location
Salaberry-de-Valleyfield: Montérégie, Québec: Canada
Construction Date and Builder / Engineer
1895 By Builder/Contractor: Dominion Bridge Company of Montréal, Québec

Technical Facts

Rehabilitation Date
2011
Main Span Length
160 Feet (49 Meters)
Structure Length
160 Feet (49 Meters)
Roadway Width
16 Feet (4.88 Meters)
Spans
1 Main Span(s)
NBI Number
Not Applicable

Historic Significance Rating (HSR)

Bridge Documentation

This bridge is an extremely rare surviving example of a pin-connected Camelback truss bridge in Canada. Indeed, surviving pin-connected truss bridges of any kind are rare in Canada.

The bridge was originally called Pont Masson and it crossed rivière Saint-Charles near Nitro on Grande-Île. The road appears today to be named Rue Masson.  In 1936, it was relocated to vieux canal de Beauharnois (Old Beauharnois Canal) in downtown Valleyfield. This location appears to have been to provide access to a park, Parc Victoria. It was apparently removed and placed into storage in 2006 when that section of canal was to be reopened to boats. Today it has been restored and relocated to a different section of the same canal, further east where it carries pedestrian traffic. This section of canal is separated from the portion that the bridge previously crossed because a section of canal in between has been filled in.

It was reported that only 7-8% of original bridge materials were replaced, which means that historic integrity of the bridge was maintained. Additionally, a video clearly shows the bridge being restored using hot metal riveting. In other words, rivets were actually replaced with rivets, and not substituted for the modern alternative of high-strength bolts. Using rivets maintains the original design and appearance of the bridge. The technique has been used in some states in the United States and has been ignored in other states. This appears to be either the first use or one of the first uses of this essential aspect of historic bridge restoration in Canada. Another aspect of the restoration was that the bridge was completely dismantled for cleaning and restoration. This method of restoration is the most thorough and it will result in a restored bridge that will offer a much longer service life.

Another unique aspect of the restoration of this bridge was the use of winter ice on the water below. The bridge trusses were assembled and laid out right on the ice by the abutments. In addition, falsework to hold the floorbeams also rested on the ice. The use of winter ice to assemble the bridge may be something that was done by bridge builders back in the era of bridges such as this.

Overall, this bridge appears to represent the best in historic bridge preservation work. It is hoped that this bridge will serve as an example to guide the restoration of more bridges in Canada. The consulting engineer was reported as Les Consultants LBCD. This consultant does not appear to have a website and little is known about them. The contractor appears to have been Flash International. Collège de Valleyfield appears to have had some involvement in the project.

Reportedly a documentary was to be made that shows the restoration process for this bridge. Below, the bridge is shown during the restoration.

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Photo Galleries and Videos: Pont Jean-de-Lalande

 
View Photo Gallery
2019 Bridge Photo-Documentation
Original / Full Size Photos
A collection of overview and detail photos. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Photo Gallery
2019 Bridge Photo-Documentation
Mobile Optimized Photos
A collection of overview and detail photos. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Photo Gallery
2011 Restoration Bridge Photo-Documentation
Original / Full Size Photos
A collection of overview and detail photos. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Photo Gallery
2011 Restoration Bridge Photo-Documentation
Mobile Optimized Photos
A collection of overview and detail photos. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Video
Documentary From YouTube
Full Motion Video
This video was formerly posted on YouTube and has since disappeared. This is an archived copy. Streaming video of the bridge. Also includes a higher quality downloadable video for greater clarity or offline viewing.

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Maps and Links: Pont Jean-de-Lalande

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