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Birdsall Bridge

Birdsall Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: July 22, 2012

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Key Facts

Facility Carried / Feature Intersected
River Road Over Ouse River
Rural: Peterborough County, Ontario: Canada
Construction Date and Builder / Engineer
By Builder/Contractor: Unknown

Technical Facts

Rehabilitation Date
Main Span Length
62 Feet (18.9 Meters)
Structure Length
73.5 Feet (22.4 Meters)
Roadway Width
14.4 Feet (4.39 Meters)
1 Main Span(s)
NBI Number
Not Applicable

Historic Significance Rating (HSR)

Bridge Documentation

This Bridge No Longer Exists!

This bridge is slated for demolition and replacement!

View The Environmental Assessment For This Bridge

View The Statement Indicating Demolition Is Planned For This Bridge

The Birdsall Bridge is an unaltered example of a riveted Warren pony truss. It includes original curbs composed of rolled channels riveted to the truss webs. The bridge's railings are pipe. The Birdsall Bridge crossing dates to at least the 1870s. The existing substructure (abutments) dates to 1930. However, in the 1950s, for unknown reasons, the superstructure of this 1930 bridge was replaced. The replacement superstructure was the existing truss seen today, which was relocated from County Road 2. As such, the original construction date of the truss is not known.

This bridge is apparently slated for demolition and replacement. During the environmental assessment, a "rehabilitation" option was considered for this bridge. However the word "rehabilitation" was used rather loosely in the assessment and the proposed work would only extend the bridge's service life by 10 years. A bridge of the type and in the condition of the Birdsall Bridge should, if the recipient of a proper comprehensive rehabilitation, provide at least 50 additional years of service life. The "rehabilitation" considered in the environmental assessment was in reality only a basic maintenance and repair project. The other alternative considered, demolition and replacement was estimated to cost six times the cost of the "rehabilitation alternative." Had this so-called rehabilitation alternative been properly classified as a "repair" alternative, and a comprehensive rehabilitation alternative considered as well, the comprehensive rehabilitation would likely cost less than replacement but more than repair. Given that this bridge's Average Daily Traffic is a mere 36 vehicles, a less costly comprehensive rehabilitation that would greatly extend the service life, while retaining the heritage bridge (which has a design sufficient for this low volume traffic road) would have been a feasible and prudent alternative.


Photos and Videos: Birdsall Bridge

Available Photo Galleries and Videos

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Bridge Photo-Documentation
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A collection of overview and detail photos. For the best visual immersion and full detail, or for use as a desktop background, this gallery presents the photos for this bridge in the original digital camera resolution.
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Bridge Photo-Documentation
Mobile Optimized Gallery
A collection of overview and detail photos. View the photos for this bridge in a reduced size which is useful for mobile/smartphone users, modem (dial-up) users, or those who do not wish to wait for the longer download times of the full-size photos. Alternatively, view this photo gallery using a popup slideshow viewer (great for mobile users) by clicking the link below.
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Westbound Crossing
Full Motion Video
Streaming video of the bridge. Also includes a higher quality downloadable video for greater clarity or offline viewing.

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