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Glendon Hill Road Canal Bridge

Glendon Hill Road Canal Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: November 8, 2015

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Key Facts

Facility Carried / Feature Intersected
Glendon Hill Road Over Lehigh Canal and Railroad (Norfolk Southern)
Glendon: Northampton County, Pennsylvania: United States
Construction Date and Builder / Engineer
1910 By Builder/Contractor: Guerber Engineering Company of Bethlehem, Pennsylvania

Technical Facts

Rehabilitation Date
Main Span Length
126 Feet (38.4 Meters)
Structure Length
137 Feet (41.8 Meters)
Roadway Width
16 Feet (4.88 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

About This Bridge

This is a traditionally composed riveted through truss. The bridge looks impressive in its position high above the canal and railroad that it crosses. It has been closed to traffic and is likely slated for demolition and replacement.

About the Guerber Engineering Company (Steel Contractor For Bridge)

The Guerber Engineering Company was mentioned in a 1901 issue of the Engineering Record:

The Guerber Engineering Co. has been oganized with a capital of $125,000, and will locate a plant at Bethlehem, Pa., to manufacture switches, signals and railway supplies. President, F. S. Guerber; secretary, R. B. Keys, Bethlehem, Pa.

The following is an obituary for Paul A. E. Guerber, from Engineering & Contracting, Volume 42, October 7, 1914.

Paul A. E. Guerber, mechanical engineer of note, and inventor of interlocking switch appliances, died at Allentown, Pa., Sept. 10. He helped to build elevated lines in New York and Brooklyn, and was formerly employed by the Jackson Manufacturing Co. Later he joined the staff of the Westinghouse Manufacturing Co., and then formed the Guerber Engineering Co. of Allentown.

Another obituary noted he was 53 years of age and noted he was educated in Paris and Switzerland and later graduated from Stevens Institute.

Information and Findings From Pennsylvania's Historic Bridge Inventory

Discussion of Bridge

The single span, 137'-long riveted Pratt thru truss bridge built in 1910 is supported on concrete abutments. It is traditionally composed of built-up members with gusset plates at the panel points. It has an open grid deck and welded channel railings (1949). The lower chord on the upstream side was replaced with a welded box section in 1949. A cantilevered sidewalk is finished with lattice railing. Riveted Pratt truss bridges were a mature technology by 1900 and this 1910 example with alterations has no individually distinguishing features. It does date from the period of significance of the NR-listed Lehigh Canal and retains sufficient integrity to be evaluated as a contributing resource to the historic canal corridor in which it is located. It was built within the 1818-1942 period of significance defined in the nomination.

Discussion of Surrounding Area

The bridge carries a 2 lane road and a sidewalk over the Lehigh Canal (NR-listed 10/2/78) and the abandoned right-of-way of the Lehigh Valley RR (Conrail) in Hugh Moore Park. At the south end is a T-shaped intersection. The canal has a period of significance from 1818-1942.

Bridge Considered Historic By Survey: Yes, Eligible. Lehigh Canal: Easton Section. 10/2/78.


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