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Simpson Road Bridge

Simpson Road Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: July 10, 2009

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Key Facts

Facility Carried / Feature Intersected
Simpson Road (TR-326) Over Dunlap Creek
Rural: Fayette County, Pennsylvania: United States
Construction Date and Builder / Engineer
1905 By Builder/Contractor: York Bridge Company of York, Pennsylvania

Technical Facts

Rehabilitation Date
Main Span Length
78 Feet (23.8 Meters)
Structure Length
78 Feet (23.8 Meters)
Roadway Width
12.5 Feet (3.81 Meters)
1 Main Span(s)
NBI Number

Historic Significance Rating (HSR)
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Bridge Documentation

This bridge's future is at risk!

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

This bridge is a traditionally composed pin-connected truss bridge. The bridge has suffered from a loss of historic integrity, since it has been altered with welded additions at the connection points and some other areas of the bridge, and railings on one of the two trusses have been replaced with welded v-laced railing. The bridge is however noteworthy as a surviving example of a York Bridge Company bridge. The side of the truss that has not had its railings replaced still displays the unique gridded railing design that the York Bridge Company used on its bridges. 

Information and Findings From Pennsylvania's Historic Bridge Inventory

Discussion of Bridge

The one span, 77' long and 16.5' wide, pin-connected, Pratt pony truss is supported on ashlar abutments with concrete seats. The trusses are traditionally composed with the upper chords and inclined end posts being built up box sections. Eye bars are used for the lower chords and diagonals. Verticals are laced angles, and the floorbeams are rolled I beams. The bridge was fabricated in 1905 by the York Bridge Co., a small regional bridge building firm. Alterations include plates that have been welded to the pins and floorbeams and the welding of rods to some the eye bar heads for apparent strengthening. The bridge has no innovative or distinctive details, and it is a late example of a regionally common technology. Neither the altered bridge nor its setting are historically or technologically significant.

Discussion of Surrounding Area

The bridge carries an unimproved 1 lane township road on a shallow reverse curve over a stream in a sparsely developed, wooded setting.

Bridge Considered Historic By Survey: No


Photo Galleries and Videos: Simpson Road Bridge

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Maps and Links: Simpson Road Bridge

This bridge was as of 2016 closed to traffic.

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