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Washington Avenue Bridge

Washington Avenue Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: June 30, 2014

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Key Facts

Location
Swissvale: Allegheny County, Pennsylvania: United States
Structure Type
Metal Through Girder, Fixed
Construction Date and Builder / Engineer
1907 By Builder/Contractor: Pennsylvania Steel Company of Steelton, Pennsylvania

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
90 Feet (27 Meters)
Structure Length
122 Feet (37 Meters)
Roadway Width
30 Feet (9.14 Meters)
Spans
2 Main Span(s)
NBI Number
2685

Historic Significance Rating (HSR)
View Information About HSR Ratings

Bridge Documentation

This plate girder bridge is noted for the unique holes in the web, which are riveted and appear to be original. The holes are just at one end of the bridge and appear to have been incorporated in the original design to provide a way for cars on the bridge to look through the girder and check for traffic on the adjacent intersecting road.

The lower portion of the girders was once encased in concrete but this has been removed.

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

Information and Findings From Pennsylvania's Historic Bridge Inventory

Discussion of Bridge

The 2 span, 122'-long, built up thru girder bridge built in 1907 is supported on ashlar abutments and a steel bent on concrete footers. The 4 western webs on each girder have circular cut outs. The floorbeams are encased in concrete. The thru girder bridge is an example of a very common bridge type with no individually distinguishing features or details. The bridge's significance is in association with the development of the PHMC-determined eligible PRR Main Line. It dates from the line's period of significance and it is associated with efforts to improve the safety and efficiency of the line by improving grade crossings. The bridge was designed and built by the railroad.

Discussion of Surrounding Area

The bridge carries a 2 lane street and sidewalks over 2 tracks and a street. The setting is dominated by late 20th century commercial buildings with some earlier residential and commercial buildings interspersed. The Conrail line is the former Pennsylvania RR Main Line that has been determined eligible by PHMC (9/14/93). The line is significant for its historic role as an important east-west through route established in the 1850s.

Bridge Considered Historic By Survey: Yes

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Photo Galleries and Videos: Washington Avenue Bridge

 
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A collection of overview and detail photos. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer

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Maps and Links: Washington Avenue Bridge

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