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McCoy Road Bridge

Putnam County Bridge 73

McCoy Road Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: May 8, 2010

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Key Facts

Facility Carried / Feature Intersected
CR-375 East (McCoy Road) Over Clear Creek
Rural: Putnam County, Indiana: United States
Construction Date and Builder / Engineer
1923 By Builder/Contractor: Vincennes Bridge Company of Vincennes, Indiana

Technical Facts

Rehabilitation Date
Main Span Length
99.7 Feet (30.39 Meters)
Structure Length
101.7 Feet (31 Meters)
Roadway Width
15.7 Feet (4.79 Meters)
1 Main 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 extremely early example of a truss bridge with bolted connections. Bolted connections only became popular in the second half of the 20th Century, as riveting lost favor as the preferred bridge fastener type. This bridge retains good historic integrity.

Information and Findings From DHPA Historic Bridge Survey

Statement of Significance

Bolted Pratt through spans are not plentiful in Indiana. This structure is also unusual for the size of its verticals, the use of collision struts, the variation in the diagonals, the use of substantial knee braces, and the position of the floor beams. It is surprising to find so many features for long and heavy trusses upon this fairly short span on a country road. The undecorated bridge retains its original members.

Architectural Description

Seated upon concrete abutments and wingwalls, this largely-bolted Pratt through span extends 102' in six panels. A pair of laced heavy channels provides each of the verticals, and a pair of angles riveted together with battens supplies the diagonals, counters, and collision struts. The angles in the diagonals of the outer panels are heavier than at midspan. Only the two most central panels are countered. Substantial knee braces help to stabilize the trusses. The I floor beams are bolted to the verticals and to gussets above the lower chord. The bridge carries a concrete deck with a 16' roadway and 15' of vertical clearance.

Bridge Considered Historic By Survey: Yes


Photo Galleries and Videos: McCoy Road Bridge

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Bridge Photo-Documentation
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Crossing The Bridge
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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