Oregon City Bridge
Oregon City Bridge - Post Rehab.
South Elevation - Post-Rehabilitation
Photo taken by Mike Goff in June 2013
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
- Steel through arch bridge over Willamette River on OR-43 in Oregon City
- Oregon City, Clackamas County, Oregon
- Open to traffic
- Built 1922, Rehabilitation 2012
- - 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)
- 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
Length of largest span: 360.0 ft.
Total length: 745.0 ft.
Deck width: 19.0 ft.
Vertical clearance above deck: 14.0 ft.
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)
- 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
- Mike Goff - michael [dot] goff [at] hotmail [dot] com
- Oregon City Bridge: Historical Preservation Project - Oregon Department of Transportation project website on the plan to restore the Oregon City Bridge.
- Historic Highway Bridges of Oregon - Dwight A. Smith, James B. Norman & Pieter T. Dykman, Oregon Historical Society Press, 1989
- HAER OR-31 - Willamette River Bridge, Spanning Willamette River on Oswego Highway 3, Oregon City, Clackamas County, OR
- Nathan Holth
- Elegant Arches, Soaring Spans - Robert W. Hadlow, Oregon State University Press, 2001
- The Portland Bridge Book - Sharon Wood Wortman, Oregon Historical Society Press, 2001
- Wikipedia - Oregon City Bridge
- Dave King - DKinghawkfan [at] hotmail [dot] com
- Royce and Bobette Haley - roycehaley111 [at] yahoo [dot] com
Oregon City Bridge