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Bonny Oaks Drive Bridge

Bonny Oaks Drive Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: November 11, 2014

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Key Facts

Facility Carried / Feature Intersected
Bonny Oaks Drive (TN-17) Over Chickamauga Creek
Chattanooga: Hamilton County, Tennessee: United States
Structure Type
Metal 8 Panel Rivet-Connected K-Parker Through Truss, Fixed and Approach Spans: Concrete T-Beam, Fixed
Construction Date and Builder / Engineer
1929 By Builder/Contractor: Unknown and Engineer/Design: Tennessee State Highway Department

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
162 Feet (49.38 Meters)
Structure Length
420 Feet (128.02 Meters)
Roadway Width
40 Feet (12.19 Meters)
1 Main Span(s) and 6 Approach Span(s)
NBI Number

Historic Significance Rating (HSR)

Bridge Documentation

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

This bridge is an example of a truss type unique to Tennessee. It combines the truss configuration of a standard Pratt-based Parker truss with that of a K-truss. The outer panels have diagonal members following a Pratt layout, while the two interior panels have K-truss diagonal members. This Tennessee design is similar to the "K-Parker" truss design found in Oklahoma, which is a K-truss with a polygonal top chord, but in Oklahoma only the end panels show the Pratt design with all other panels having a K-truss diagonal layout.

There used to be more and larger examples of these Tennessee K-truss bridges, but most have been demolished.

A trail passes under the bridge, only a few feet below the western approach. Yet someone stupidly never connected this trail to the bridge and roadway above. This trail undoubtedly offers great views of the bridge, but because it does not connect, you would have to park in a completely different location and walk a fair distance.

This bridge retains good historic integrity, aside from alteration of portal bracing to increase vertical clearance.


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