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Mansfield Bridge

Dravosburg Bridge

Mansfield Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: July 20, 2019, and October 2, 2021

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and Videos
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Facility Carried / Feature Intersected
Richland Avenue Over Monongahela River and Various Roads and Railroads
Location
Dravosburg and McKeesport: Allegheny County, Pennsylvania: United States
Structure Type
Metal Cantilever 20 Panel Rivet-Connected Warren Through Truss, Fixed and Approach Spans: Metal Deck Girder, Fixed
Construction Date and Builder / Engineer
1951 By Builder/Contractor: American Bridge Company of New York, New York and Engineer/Design: Allegheny County Department of Public Works
Rehabilitation Date
2015
Main Span Length
500.0 Feet (152.4 Meters)
Structure Length
1,934.0 Feet (589.5 Meters)
Roadway Width
48 Feet (14.63 Meters)
Spans
3 Main Span(s) and 10 Approach Span(s)
Inventory Number
2579

Historic Significance Rating (HSR)
View Information About HSR Ratings

Bridge Documentation

This is an outstanding, unaltered example of a mid 20th century cantilever truss bridge. Due to the staggering loss of older and more historic bridges over this river, this bridge, which once might have been beneath notice, is an increasingly rare and interesting example of a riveted truss bridge over a large river. The full name of the bridge is the W.D. Mansfield Memorial Bridge, named after William D. Mansfield, who served as an Allegheny County Commissioner and later as a State Senator. Reportedly, this bridge was under construction by 1948 and was made from steel specifically sourced from the melted scrap of the Wabash Bridge.

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

Information and Findings From Pennsylvania's Historic Bridge Inventory

Discussion of Bridge

The 13-span bridge has a 3-span, continuous thru truss main span with a suspended section (200'-500'-200') and 10 simple, built up deck grider approach spans. It was built in 1951, and it is supported on a concrete substructure. The cantilevered sidewalks are finished with standard-design metal railings. The main truss member are built up. Although a major river crossing, the large bridge has no innovative or distinctive details and is one of several similar cantilevered thru truss bridges design and built by the county after World War II. It utilizes engineering principles known and used since the late 1920s. Neither the bridge nor its setting/contexts are historically or technologically significant. The bridge is not historic in association with either of the railroads that it crosses.

Discussion of Surrounding Area

The bridge carries a barrier-divided, 4-lane road over the river, local streets, and railroads on both riverbanks. Conrail is on the west bank, and P & LE RR is on the east side of the river. The bridge links Dravosburg and McKeesport.

Bridge Considered Historic By Survey: No


This bridge is tagged with the following special condition(s): Unorganized Photos

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Photo Galleries and Videos: Mansfield Bridge

 

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Bridge Photo-Documentation

Original / Full Size Photos
A collection of overview and detail photos. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer.
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View Photo Gallery

Bridge Photo-Documentation

Mobile Optimized Photos
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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View Photo Gallery

Additional Unorganized Photos

Original / Full Size Photos
A supplemental collection of photos that are from additional visit(s) to the bridge and have not been organized or captioned. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer.
Alternatively, Browse Without Using Viewer

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View Photo Gallery

Additional Unorganized Photos

Mobile Optimized Photos
A supplemental collection of photos that are from additional visit(s) to the bridge and have not been organized or captioned. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer.
Alternatively, Browse Without Using Viewer

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View Video

CarCam: Eastbound Crossing

Full Motion Video
Note: The downloadable high quality version of this video (available on the video page) is well worth the download since it offers excellent 1080 HD detail and is vastly more impressive than the compressed streaming video. Streaming video of the bridge. Also includes a higher quality downloadable video for greater clarity or offline viewing.

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Maps and Links: Mansfield Bridge

Coordinates (Latitude, Longitude):

Search For Additional Bridge Listings:

Bridgehunter.com: View listed bridges within 0.5 miles (0.8 kilometers) of this bridge.

Bridgehunter.com: View listed bridges within 10 miles (16 kilometers) of this bridge.

HistoricBridges.org Bridge Browser: View listed bridges within 0.5 miles (0.8 kilometers) of this bridge.

HistoricBridges.org Bridge Browser: View listed bridges within 10 miles (16 kilometers) of this bridge.

2021 National Bridge Inventory: View listed bridges within 0.5 miles (0.8 kilometers) of this bridge.

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USGS National Map (United States Only)

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