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Wilson River Bridge

Photos 

Wilson River Bridge

from the southwest

Photo taken by Michael Goff on August 1, 2009

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BH Photo #144358

Map 

Street Views 

Description 

The Wilson River Bridge at Tillamook is the first reinforced-concrete tied-arch span built in the Pacific Northwest region of the United States. In the 1910s, its designer, Conde B. McCullough, worked for the Des Moines, Iowa bridge firm, the Marsh Engineering Company. Its founder James B. Marsh created a patented "rainbow arch" reinforced-concrete bridge, in 1912, which he built all through the states of Kansas and Iowa in the early twentieth century. The success of the Marsh version of the reinforced-concrete tied-arch, using angle steel and concrete, may have influenced C.B. McCullough in his decision to use this form at the Wilson River and shortly thereafter, nearly identical structures over Ten Mile Creek and Big Creek in Lane County, Oregon. McCullough differed from Marsh in that he used reinforcing bar instead of steel plate in his arches. He also created the first reinforced-concrete tied-arch bridges in the Pacific Northwest, the region of the United States that includes western Montana, northern Idaho, Washington and Oregon. - HAER Survey

Facts 

Overview
Reinforced concrete tied arch bridge over Wilson River on US 101
Location
Tillamook County, Oregon
Status
Open to traffic
History
Built 1931
Builders
- Clackamas Construction Co. of Clackamas, Oregon (Contractor)
- Conde B. McCullough of Redfield, North Dakota (Bridge Engineer)
Design
The Wilson River Bridge was first reinforced concrete tied arch bridge in the Pacific Northwest.
Dimensions
Length of largest span: 120.0 ft.
Total length: 180.1 ft.
Deck width: 27.0 ft.
Vertical clearance above deck: 12.3 ft.
Recognition
Posted to the National Register of Historic Places on August 5, 2005
Approximate latitude, longitude
+45.47825, -123.84451   (decimal degrees)
45°28'42" N, 123°50'40" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/433995/5036426 (zone/easting/northing)
Quadrangle map:
Tillamook
Inventory numbers
OR 01499 (Oregon Dept. of Transportation structure number)
NRHP 05000825 (National Register of Historic Places reference number)
BH 30138 (Bridgehunter.com ID)
Inspection (as of 05/2014)
Deck condition rating: Fair (5 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 41.3 (out of 100)
Average daily traffic (as of 2014)
18,400

Update Log 

  • June 7, 2017: New photos from John Bernhisel
  • December 14, 2016: New photos from Mike Goff
  • March 12, 2014: Updated by Dave King: Added NRHP info & description
  • April 27, 2010: New Street View added by Michael Goff
  • August 6, 2009: New photos from Michael Goff
  • April 20, 2009: Posted HAER photos
  • July 30, 2008: Updated by Michael Goff

Sources 

  • Mike Goff - michael [dot] goff [at] hotmail [dot] com
  • Historic Highway Bridges of Oregon - Dwight A. Smith, James B. Norman & Pieter T. Dykman, Oregon Historical Society Press, 1989
  • HAER OR-39 - Wilson River Bridge, Spans Wilson River at U.S. Highway 101, Tillamook, Tillamook County, OR
  • Elegant Arches, Soaring Spans - Robert W. Hadlow, Oregon State University Press, 2001
  • Wikipedia - Wilson River Bridge
  • Dave King - DKinghawkfan [at] hotmail [dot] com
  • John Bernhisel - Johnmbernhisel [at] gmail [dot] com