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Devereux Road Bridge

Devereux Road Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: May 31, 2010

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Key Facts

Facility Carried / Feature Intersected
Devereux Road Over East Branch Brandywine Creek
Location
Rural: Chester County, Pennsylvania: United States
Construction Date and Builder / Engineer
1877 By Builder/Contractor: Wrought Iron Bridge Company of Canton, Ohio

Technical Facts

Rehabilitation Date
1995
Main Span Length
76 Feet (23 Meters)
Structure Length
78 Feet (24 Meters)
Roadway Width
15 Feet (4.57 Meters)
Spans
1 Main Span(s)
NBI Number
15701504090138

Historic Significance Rating (HSR)

Bridge Documentation

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

This bridge is a structure with several layers of high historic significance. First, constructed in 1877, this bridge is an extremely early Pratt truss bridge. Second, it is an early surviving work of the prominent and noteworthy Wrought Iron Bridge Company. The bridge is also unusual for the composition of the truss members, notably the vertical members. Rather than a single row of lattice like many bridges would have, this bridge have two rows of lattice. This seemingly simple design change is either extremely rare or unique among similar bridges remaining today. This change also makes the bridge have a different visual appearance from the average Pratt pony truss bridge. The double rows of lattice are contained between rolled "t-bars" which were a design of rolled beam that Wrought Iron Bridge Company references in several patents. These t-bars accomplish the same thing that two rolled angles riveted together often accomplish on other bridges. The bottom chord is not connected to the hip verticals on this bridge, another unusual detail. The floorbeams of this bridge are built-up in the fishbelly style, and they include decorative cast iron caps on the ends, a detail that the Wrought Iron Bridge Company often used on its bridges of the 1870s.

The plaque on this bridge references an April 28 1874 patent, however the only patent found for Wrought Iron Bridge Company's David Hammond under that date is this patent which appears to reference a bridge which looks nothing like this bridge. The plaque may simply be a generic plaque.

This bridge has been rehabilitated and the work includes post-tensioning of members on the bridge. Post-tensioning introduces elements on the bridge which are not original, however it does not remove or alter the original members, and so despite these additions, the historic integrity of the original bridge material remains good. Wooden guardrails on the bridge are mounted on the deck, and as such they are effective at protecting the trusses from collision damage. Very little section loss and pack rust was observed on the bridge during the field visit, and the paint condition was good as well. If the bridge continues to be maintained in this condition it will continue to be a functional crossing for the foreseeable future.

Information and Findings From Pennsylvania's Historic Bridge Inventory

Discussion of Bridge

The single-span, pin-connected Pratt pony truss had been found eligible for the National Register by the PHMC. According to county records the bridge was built in 1877. It is noteworthy for the built-up lattice verticals. The fabricator is not specified in the county bridge records.

Bridge Considered Historic By Survey: Yes

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Photo Galleries and Videos: Devereux Road 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. Alternatively, Browse Without Using Viewer
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
View Photo Gallery
Elaine Deutsch Collection
Original / Full Size Photos
A collection of winter overview photos taken in January, 2008. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Photo Gallery
Elaine Deutsch Collection
Mobile Optimized Photos
A collection of winter overview photos taken in January, 2008. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Video
Northbound Crossing of the Bridge
Full Motion Video
Streaming video of the bridge. Also includes a higher quality downloadable video for greater clarity or offline viewing.
View Video
Southbound Crossing of 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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Maps and Links: Devereux Road Bridge

Coordinates (Latitude, Longitude):
40.077780,-75.760520

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