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CR-100 South Bridge

Jackson County Bridge 197

CR-100 South Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: May 10, 2010

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Key Facts

Facility Carried / Feature Intersected
CR-100 South Over McHargue Ditch
Rural: Jackson County, Indiana: United States
Construction Date and Builder / Engineer
1918 By Builder/Contractor: Henry Harman

Technical Facts

Rehabilitation Date
Main Span Length
61 Feet (18.6 Meters)
Structure Length
65 Feet (19.8 Meters)
Roadway Width
17.7 Feet (5.39 Meters)
1 Main Span(s)
NBI Number

Historic Significance Rating (HSR)
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Bridge Documentation

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

This bridge is noteworthy for its use of bolted connections. While not the earliest example of the use of bolted connections, it is still part of a period of time in history where bolted connections were occasionally used as builders transitioned from pins to rivets in connections. Bolted connections would later make a comeback in the second half of the 20th Century.

Information and Findings From DHPA Historic Bridge Survey

Statement of Significance

Bolted Warren ponies represent a fairly short, intermediate stage in the truss' development towards all-riveted structures. This bridge is of standard design for its type and stage and retains its original members, including latticed guardrails.

Architectural Description

Concrete abutments and wingwalls support the single-span, somewhat skewed Warren pony truss. The largely-bolted structure extends 64' in four panels. Its all-interior verticals and its diagonals are manufactured from a pair of angles riveted together with battens. The I floor beams are bolted to gussets and the verticals below the lower chord and carry the asphalt-over-concrete deck with its 16' roadway.

Other Information

This bridge was built over McHargue Ditch, near the Weddle property in Brownstown Township, by a local contractor, Henry Harman, for the sum of $1044.00. The contract letting date was 11 March 1918. [county research results]

Bridge Considered Historic By Survey: Yes


Photo Galleries and Videos: CR-100 South Bridge

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