Willamette River Bridge

Map 

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Facts 

Overview

Steel through arch bridge over Willamette River on HWY 3 in Oregon City

Location

Oregon City, Clackamas County, Oregon

Status

Open to traffic

History

Built 1922

Builders

- A. Guthrie & Co.
- Conde B. McCullough

Design

The main structural portions of the arch section of the bridge are made of steel. The arch ribs are hollow steel boxes riveted together. These, and the steel floor beams and stringers which support the deck, are encased in a 1-1/2 inch coating of sprayed concrete, called Gunite.
The columns and hangers supporting the deck from the arch ribs are steel sections. The Xshaped cross bracing between the arches are steel trusses. Both of these are encased in solid concrete. The lower arch ribs are connected to appear as a solid spandrel.
Information from ODOT Website
http://www.oregon.gov/ODOT/HWY/REGION1

Dimensions

Length of largest span: 360.0 ft.
Total length: 745.0 ft.
Deck width: 19.0 ft.
Vertical clearance above deck: 14.0 ft.

Also called

Oregon City Bridge

Approximate latitude, longitude

+45.21322, -122.36344   (decimal degrees)
45°12'48" N, 122°21'48" W   (degrees°minutes'seconds")

Approximate UTM coordinates

10/549984/5006834 (zone/easting/northing)

USGS topographic map

Elwood

Inventory number

BH 29898 (Bridgehunter.com ID)

Inspection (as of 01/2008)

Deck condition rating: Poor (4 out of 9)
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 7.5 (out of 100)

Average daily traffic (as of 2006)

14,200

Categories 

Update Log 

• August 20, 2008: Updated by Michael Goff
• July 28, 2008: Updated by Michael Goff
• June 9, 2008: New photos from Michael Goff

Sources 

• Michael Goff - michael [dot] goff [at] odot [dot] state [dot] or [dot] us
• Oregon City Bridge: Historical Preservation Project - Oregon Department of Transportation project website on the plan to restore the Oregon City Bridge.
• Oregon City Bridge HAER Webpage

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