Rating:
3 votes

Northampton Street Bridge

Photos 

General View, Looking South From West Bank Of The Delaware River

Photo taken by Historic American Engineering Record

View photos at Library of Congress

BH Photo #142373

Map 

Street View 

Description 

The Northampton Street Bridge is one of a few extant eye-bar cantilever bridges in the United States. Its 50'-0"-long central span, supported between two 250'-0" cantilever arms, is carefully disguised by superfluous members so as to appear as a smooth catenary. Its appearance is tastefully balanced between Gothic flamboyance and a spartan machine aesthetic a piece of urban "structural art." Designed by James Madison Porter III, professor of engineering at nearby Lafayette College and an early advocate of materials testing, this bridge is his most important work. Bethlehem Steel Company repaired the structure to its original design in 1957, after it was heavily damaged by a flood two years previous. The Northampton Street Bridge has been designated a National Historic Civil Engineering Landmark by the American Society of Civil Engineers.

- Historic American Engineering Record

Facts 

Overview
Cantilevered through truss bridge over Delaware River on Northampton Street
Location
Easton, Northampton County, Pennsylvania, and Warren County, New Jersey
Status
Open to two-lane traffic with a 3 ton weight limit
History
Built 1896; damaged and fixed 1955; rehabilitated 2002
Builders
- Bethlehem Steel Co. of Bethlehem, Pennsylvania (1957)
- James Madison Porter III (Designer)
- Union Bridge Co. of Buffalo, New York & Athens, Pennsylvania (Fabricator)
Design
Cantilevered eyebar through truss
Dimensions
Length of largest span: 299.9 ft.
Total length: 560.1 ft.
Deck width: 32.2 ft.
Vertical clearance above deck: 16.1 ft.
Recognition
Posted to the National Register of Historic Places
Also called
Northampton Street Toll-supported Bridge (official name)
Easton-Phillipsburg Bridge Free Bridge
Approximate latitude, longitude
+40.69167, -75.20500   (decimal degrees)
40°41'30" N, 75°12'18" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/482679/4504550 (zone/easting/northing)
Quadrangle map:
Easton
Inventory numbers
PA 48 7302 9992 0005 (Pennsylvania Bridge Management System number)
BH 41694 (Bridgehunter.com ID)
Inspection (as of 06/2008)
Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Good (7 out of 9)
Sufficiency rating: 20.5 (out of 100)
Average daily traffic (as of 1993)
31,769

Update Log 

  • September 25, 2016: Updated by Christopher Finigan: Added category "Riveted"
  • August 14, 2016: Updated by Christopher Finigan: Added category "Pin-connected"
  • August 14, 2016: Photo imported by Dave King
  • June 26, 2013: New Street View added by Dave King
  • September 22, 2010: New photos from Raymond Klein
  • September 21, 2010: New photo from Raymond Klein
  • July 9, 2009: Updated by Ian Anderson

Sources 

  • Ian Anderson - macsignals [at] gmail [dot] com
  • Delaware River Joint Toll Bridge Commission - Info page on this bridge
  • HAER PA-502 - Northampton Street Bridge, Spanning Delaware River at Northampton Street (U.S. Route 22 Alternate), Easton, Northampton County, PA
  • Raymond Klein - Bookshelfthe [at] msn [dot] com
  • Wikipedia
  • Dave King - DKinghawkfan [at] hotmail [dot] com

Comments 

Northampton Street Bridge
Posted July 9, 2009, by Ian Anderson (macsignals [at] gmail [dot] com)

Kevin is right, this bridge still exists and still carries traffic with a 3 ton weight limit. Owned by the DRJTBC, rehabilitated in 2002. I'll update the page to reflect this.

Northampton Street Bridge
Posted July 8, 2009, by Kevin Flynn (kevin [dot] j [dot] flynn [at] comcast [dot] net)

The Northampton Street Bridge was not replaced in 2002; it is the same 1896 span. Perhaps it was rehabilitated in 2002?

It was severely damaged in the 1955 Delaware River flood after Hurricane Dianne in August; the center span broke and it was repaired. This 1896 bridge replaced an older covered bridge in the same location.