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Grand Ridge Road Bridge

Grand Ridge Road Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: December 13, 2012

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Key Facts

Facility Carried / Feature Intersected
Grand Ridge Road (TR-109B, CR-3000 South) Over West Fork Mazon River
Location
Rural: Grundy County, Illinois: United States
Construction Date and Builder / Engineer
By Builder/Contractor: Unknown

Technical Facts

Rehabilitation Date
1965
Main Span Length
71 Feet (22 Meters)
Structure Length
72 Feet (22 Meters)
Roadway Width
11.8 Feet (3.6 Meters)
Spans
1 Main Span(s)
NBI Number
32499507655

Historic Significance Rating (HSR)

Bridge Documentation

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

This bridge has a 1910 construction date given in the National Bridge Inventory. This date appears to be a default date placed in the database and does not appear to be correct based on the style of the bridge as well as the font used by Carnegie for its name that appears on many of the members of this bridge. The bridge appears to be wrought iron based on the lack of deterioration despite a lack of paint on the bridge. The bridge has built-up fishbelly style floor beams. Otherwise, the bridge is a traditionally composed example of a pin-connected truss bridge. These details all suggest that the bridge may date to between 1885 and 1895. The bridge is thus noteworthy as an unaltered and fairly early surviving example of its type. The builder of this bridge is unknown. The bridge's western abutment was reconstructed with concrete at some date long ago. The eastern abutment is stone.

The bridge is closed to traffic but from a restoration viewpoint, is in good condition and could easily be restored. Even in its current unrestored condition, the bridge does not appear to be at risk for collapse. Overall, there is little deterioration on the bridge. In particular, there is hardly any section loss on the members at the bottom chord connections, which is a traditional location for the worst deterioration on a truss bridge.

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Photo Galleries and Videos: Grand Ridge Road Bridge

 
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Maps and Links: Grand Ridge Road Bridge

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