Historic Bridges of the U.S. | Columbia River Interstate Bridge

Photos

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Overview

Photos taken 1993 by Jet Lowe for the Historic American Engineering Record

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Lift spans

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Portal

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Interstate Bridge - Lift Spans

March 25, 2007

Photo taken by Michael Goff in March 2007

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Interstate Bridge - At Night

December 28, 2008

Photo taken by Michael Goff in December 2007

Overview: Pair of vertical lift bridges over the Columbia River on I-5 between Vancouver and Portland in Portland
Status: Open to traffic
History: Northbound bridge built 1917; southbound bridge built 1958
Builders: - American Bridge Co. of New York (Steel Fabricator)
- Pacific Bridge Co. (Contractor)
- Porter Brothers Co. (Steel Erector)
- Waddell & Harrington (Northbound Engineers)
Design: Vertical lift Parker through truss
Dimensions: Length of largest span: 531.0 ft.
Total length: 3,538.2 ft.
Deck width: 38.1 ft.
Vertical clearance above deck: 15.5 ft.
Recognition: Eligible for the National Register of Historic Places
Approximate latitude, longitude: +45.61778, -122.67500 (decimal degrees)
45°37'04" N, 122°40'30" W (degrees°minutes'seconds")
Inventory number: BH 30106 (Bridgehunter.com ID)
Inspection (as of 02/2006): Deck condition rating: Fair (5 out of 9)
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 31.5 (out of 100)
Average daily traffic (as of 2004): 62,250