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Black Rock Bridge

Black Rock Bridge

Primary Photographer(s): Elaine Deutsch

Bridge Documented: January 16, 2012

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Key Facts

Facility Carried / Feature Intersected
Black Rock Road (PA-113) Over Schuylkill River
Rural: Montgomery County, Pennsylvania and Chester County, Pennsylvania: United States
Construction Date and Builder / Engineer
1916 By Builder/Contractor: Unknown

Technical Facts

Rehabilitation Date
Main Span Length
116 Feet (35.4 Meters)
Structure Length
554 Feet (168.9 Meters)
Roadway Width
29 Feet (8.84 Meters)
5 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 an attractive open spandrel concrete arch bridge. The top portion of the bridge: floor beams, deck, and railing have all been replaced. The railings are modern New Jersey Barriers... not remotely similar to the original bridge. So, while the bridge today remains an attractive and historically significant example of a somewhat early surviving arch bridge, the only people who can enjoy the historic aspects of the bridge are those beside the bridge. To people crossing the bridge, there is nothing historic to see anymore and the bridge looks modern. Recommended future preservation work for this bridge would be to replace the New Jersey barriers with replicas of the original railings. If needed, the exact dimensions and reinforcing could be altered to ensure the railings meet safety standards. Such techniques have been employed successfully in preservation projects elsewhere in the country.

Information and Findings From Pennsylvania's Historic Bridge Inventory

Discussion of Bridge

The 5 span, 554'-long open spandrel arch bridge is listed in the National Register. In 1991 the bridge's concrete floorbeams, deck, parapets, and concrete light standards were removed. A wider deck was added; the railings were replaced with concrete parapets with paneled exterior faces and safety shape interior faces.

Discussion of Surrounding Area

The bridge carries a 2 lane highway over the Schuylkill River between Chester and Montgomery counties. The setting is rural with scattered mid- to late-20th century residences.

Bridge Considered Historic By Survey: Yes


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