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Mill Street Bridge

Mill Street Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: July 3, 2006

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Key Facts

Facility Carried / Feature Intersected
Mill Street Over Railroad (Norfolk Southern)
Millsboro: Washington County, Pennsylvania: United States
Construction Date and Builder / Engineer
1908 By Builder/Contractor: American Bridge Company of New York, New York

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
98 Feet (29.9 Meters)
Structure Length
98 Feet (29.9 Meters)
Roadway Width
18 Feet (5.49 Meters)
1 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 located in Millsboro and passes over a Norfolk Southern owned line, which is the historic Monongahela Railroad line. This bridge has such a huge skew to it, that if you stand on the bridge at the end post shown to the left in the above photo, you are directly across from the right hand side of the truss on the other side of the bridge! The abandoned bridge is highly overgrown, and has been abandoned for some time. The deck is also deteriorating, with holes noted in portions of the deck. The bridge has pipe railings and ornate cast iron railing end posts were found on the bridge as well.

Information and Findings From Pennsylvania's Historic Bridge Inventory

Discussion of Bridge

The skewed, 98' long and 24' wide riveted Warren with verticals pony truss bridge fabricated in 1908 by the American Bridge Co. is supported on concrete abutments. The trusses are traditionally composed with most of the members being angles with the upper chords have plate between the back-to-back angles. That plate serves as the connection for the verticals and diagonals. The verticals are shaped to provide lateral bracing. The bridge is a standard Pennsylvania RR design that was built for road overpasses since at least 1897. This example is complete, and it is historically significant in association with the Monongahela Railway, which PHMC has determined to be a historic district. Since the bridge is a example of a standard PRR design, it is not individually significant, but it is significant in association with the railroad that has been determined to be a historic district. The bridge is a contributing resource to the historic district.

Discussion of Surrounding Area

The bridge is closed to all traffic. It carried a two-lane street over one active track of the Monongahela Railroad in Millsboro, near the Washington-Greene County line. The bridge is on the edge of an area of undistinguished vernacular early 20th century residences. The area does not appear to have historic district potential. The Monongahela Railway was been determined eligible by PHMC in 1997. No period of significance or definition of contributing and noncontributing resources was apparently part of that determination.

Bridge Considered Historic By Survey: Yes, But Only By Association With Historic Monongahela Railway


Photo Galleries and Videos: Mill Street Bridge

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Maps and Links: Mill Street Bridge

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