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Herndon Bypass Road Bridge

Herndon Bypass Road Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: August 26, 2019

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Key Facts

Facility Carried / Feature Intersected
PA-3006 (Herndon Bypass Road) Over Mahanoy Creek
Location
Rural: Northumberland County, Pennsylvania: United States
Construction Date and Builder / Engineer
1940 By Builder/Contractor: Unknown and Engineer/Design: Pennsylvania State Highway Department

Technical Facts

Rehabilitation Date
2001
Main Span Length
153 Feet (47 Meters)
Structure Length
158 Feet (48 Meters)
Roadway Width
24 Feet (7.32 Meters)
Spans
1 Main Span(s)
NBI Number
29234

Historic Significance Rating (HSR)

Bridge Documentation

This is a small through truss example of a state standard through truss bridge. The bridge has altered portal and sway bracing.

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

Information and Findings From Pennsylvania's Historic Bridge Inventory

Discussion of Bridge

The one-span, 158'-long, rivet-connected Parker thru truss bridge built in 1941 has built-up chords, rolled section diagonals and verticals, metal railings, concrete deck, rolled floorbeams and stringers, and concrete abutments with flared wingwalls. The bridge is a late example of the Parker truss type, a variation of the Pratt truss with polygonal top chord, developed in the 1870s and patented by engineer Charles H. Parker. The truss type was adopted by the state highway department in the late 1920s as a standard design for long-span crossings. It was used extensively through the 1930s, with over 80 post-1925 examples identified. This 1941 example has no noteworthy features. Earlier examples of rivet-connected Parker trusses better illustrate the historical and technological significance of the bridge type. The bridge is not historically distinguished by its setting or context.

Discussion of Surrounding Area

The bridge carries a 2 lane road over a stream in a sparsely developed, rural area with scattered 20th-century residences. The setting does not appear to have historic district potential.

Bridge Considered Historic By Survey: No

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Photo Galleries and Videos: Herndon Bypass Road Bridge

 
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Maps and Links: Herndon Bypass Road Bridge

Coordinates (Latitude, Longitude):

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