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Blenheim Road Bridge

Silver Bridge

Blenheim Road Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: April 12, 2011

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Key Facts

Facility Carried / Feature Intersected
Blenheim Road Over Nith River
Location
Rural: Oxford County, Ontario: Canada
Construction Date and Builder / Engineer
1930 By Builder/Contractor: Reid-Riddell Engineering of Toronto, Ontario

Technical Facts

Rehabilitation Date
1996
Main Span Length
Not Available
Structure Length
127 Feet (38.71 Meters)
Roadway Width
14.8 Feet (4.51 Meters)
Spans
1 Main Span(s)
NBI Number
Not Applicable

Historic Significance Rating (HSR)

Bridge Documentation

This bridge is built to a particular design and truss configuration that was built throughout Ontario and of which a small collection of examples still remain today to represent the design and the characteristics which define the group. Although the design is found on multiple bridges in Ontario, outside of Ontario the design of these bridges would be classified as extremely unusual and rare. Two elements make the design unusual. First, the truss configuration is a subdivided double-intersection Warren. This means that in addition to a vertical member between each "X" of diagonal members, there is also a vertical member that passes right through the center of each "X." Double-intersection Warrens are uncommon, but subdivided double-intersection Warren truss bridges are very unusual. The other unusual feature of these bridges is the shallow slope of the end post, which results in an unusually long endpost. As a result of this unusually long end post design, there is an additional vertical and diagonal member that connect to the endpost halfway up, and there is also a floorbeam under the vertical member.

The Blenheim Road Bridge is an excellent example of this type. It is of decent span length and it retains good historic integrity.

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Photo Galleries and Videos: Blenheim Road Bridge

 
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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
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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
Bumpercam: 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.
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Northbound 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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Southbound 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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