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Pont Champlain (Champlain Bridge)

Pont Champlain (Champlain Bridge)

Primary Photographer(s): Nathan Holth

Bridge Documented: July 11, 2019

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Key Facts

Montréal and Brossard: Montréal, Québec and Montérégie, Québec: Canada
Structure Type
Metal Cantilever Bolt-Connected Warren Through Truss, Fixed and Approach Spans: Metal Bolt-Connected Warren Deck Truss, Fixed
Construction Date and Builder / Engineer
1962 By Builder/Contractor: Dominion Bridge Company of Montréal, Québec and Engineer/Design: Philip Louis Pratley and Henry Hugh Lewis Pratley

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
707 Feet (215.5 Meters)
Structure Length
11,286 Feet (3440 Meters)
Roadway Width
74 Feet (22.56 Meters)
3 Main Span(s)
NBI Number
Not Applicable

Historic Significance Rating (HSR)
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Bridge Documentation

This bridge's future is at risk!

Bridge Status: This bridge has been replaced and as of 2020, a slow, multi-year demolition project has begun!

This large cantilever truss bridge, noted for its impressive width as much as its length, was replaced and demolished. The bridge was designed by Philip Louis Pratley and Henry Hugh Lewis Pratley. Philip Louis Pratley (who would have been in his 70s when this bridge was built) was a famous Candian engineer who served on the Government Board of Engineers for the famous Pont de Québec. Other involved engineers were Philippe Ewart as well as Lalonde and Valois. Dominion Bridge was the contractor for the bridge. Additional involved contractors were Atlas Construction Company Limited, McNamara (Quebec) Limited, The Key Construction Inc., and Deschamps & Bélanger Limitée. A lot of concrete bridges in Montréal seem to have suffered from a lot of deterioration. Certainly the use of winter deicing salts contribute to this, but certainly this isn't the only city in Canada to see snow. Its not clear why so many concrete overpasses and bridges in Montreal have a lot of concrete deterioration. In any case, this bridge was no exception with the concrete approach spans deteriorating severely. In its final years of use, supplemental post-tensioning and trusses were added to stabilize the approach spans. At the time of its closure, the bridge was the busiest bridge in Canada. 

The main cantilever span was about 707 feet, while the three main spans combined measured about 1,475 feet. The total length of the truss spans of the bridge, including three cantilever truss spans, and four deck truss spans was about 2,500 feet.

The loss of this bridge is unfortunate in the sense that it was a major engineering project, designed and built largely by Canadians, and probably one of the last major projects associated with famous Canadian engineer Philip Louis Pratley. In contrast, the replacement bridge was buiit by a United States based multi-national engineering company, T. Y. Lin. The replacement bridge is a typical modern cable-stayed bridge, a bridge type that is currently uncommon locally, but is the most common type of large-span bridge built today, and is downright common in places that have failed to preserve heritage bridges like Vancouver. It is hoped that the surviving major bridges in Montréal will be carefully maintained and preserved so that cable-stayed bridges remain uncommon in the area. While this was a significant heritage bridge, it was not as significant as the other surviving major heritage bridges in the city.

Note that when HistoricBridges.org visited Montréal, this bridge had already been closed to traffic, so the photos were taken from beside the bridge only.



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