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Oregon City Bridge

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Oregon City Bridge - Post Rehab.

South Elevation - Post-Rehabilitation

Photo taken by Mike Goff in June 2013

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Description 

The Willamette River Bridge (commonly called the Oregon City Arch Bridge) is 745' long with a 360-foot steel through arch of box-girder construction, encased in gunite. The gunite encasement was necessary to prevent corrosion from sulphur dioxide fumes from the paper mills south of the bridge. This is the only gunite-covered bridge in Oregon. The 1921-1922 Biennial Report of the Oregon State Highway Commission praised this bridge as being "the most artistic appearing large bridge in the State."

- Historic American Engineering Record

Facts 

Overview
Steel through arch bridge over Willamette River on OR-43 in Oregon City
Location
Oregon City, Clackamas County, Oregon
Status
Open to traffic
History
Built 1922, Rehabilitation 2012
Builders
- A. Guthrie & Co. of St. Paul, Minnesota (Contractor)
- Conde B. McCullough of Redfield, North Dakota (Bridge Engineer)
- Raymond A. Furrow (Construction Supervisor)
- Wildish Standard Paving Co. of Eugene, Oregon (Rehabilitation Contractor)
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.
Recognition
Posted to the National Register of Historic Places on July 1, 2005
Also called
Willamette River Bridge
Approximate latitude, longitude
+45.35903, -122.60969   (decimal degrees)
45°21'33" N, 122°36'35" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/530569/5022909 (zone/easting/northing)
Quadrangle map:
Oregon City
Inventory numbers
OR 00357 (Oregon Dept. of Transportation structure number)
NRHP 05000639 (National Register of Historic Places reference number)
BH 29898 (Bridgehunter.com ID)
Inspection (as of 12/2015)
Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 45.0 (out of 100)
Average daily traffic (as of 2014)
12,400

Update Log 

  • October 17, 2014: New photos from Royce and Bobette Haley
  • March 9, 2014: Updated by Dave King: Added NRHP info & imported photos
  • June 20, 2013: New photos from Mike Goff
  • April 25, 2010: New Street View added by Nathan Holth
  • April 20, 2009: Posted HAER photos
  • February 19, 2009: Updated by Michael Goff
  • August 20, 2008: Updated by Michael Goff
  • July 28, 2008: Updated by Michael Goff
  • June 9, 2008: New photos from Michael Goff

Related Bridges 

Sources 

Comments 

Oregon City Bridge
Posted October 17, 2012, by Nathan Holth (form3 [at] historicbridges [dot] org)