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Neawanna Creek Bridge

Clatsop County, Oregon
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Neawanna Creek Bridge

Photo taken by Michael Goff in September 7, 2008

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Street Views 

View Uglybridges.com report

Facts 

Overview
Concrete deck girder bridge over Neawanna Creek on U.S. 101 in Seaside
Location
Seaside, Clatsop County, Oregon
Status
Open to traffic
History
Built 1930
Builders
- Conde B. McCullough of Redfield, North Dakota (Bridge Engineer)
- F. L. Odom (Contractor)
Design
The Neawanna Creek Bridge is significant as an intact example of a 1930s continuous concrete, multi-span highway bridge, utilizing Hardy Cross's moment distribution theory, and for its association with C.B. McCullough, Oregon's premier bridge engineer. The configuration of continuous concrete T-Beam construction utilized in the design of the 1930 Neawanna Creek Bridge represents a significant change in structural engineering theory and reinforced concrete technology by applying the moment distribution technique of distributing loads on girder structures. The moment distribution theory for continuous concrete frames was developed in the late 1920s by Hardy Cross, a civil engineer and professor of structural engineering at the University of Illinois. Hardy Cross was regarded by his contemporaries as a leader in a new school of thought in the field of structural analysis, and his theory is regarded by many architects and engineers to be one of the more significant structural theories developed during the 20th century.
Information from HAER Neawanna Creek Bridge Page
Dimensions
Length of largest span: 52.5 ft.
Total length: 210.0 ft.
Deck width: 26.9 ft.
Approximate latitude, longitude
+46.01056, -123.91139   (decimal degrees)
46°00'38" N, 123°54'41" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/429442/5095624 (zone/easting/northing)
USGS topographic map
Gearhart
Inventory numbers
OR 01305 (Oregon Dept. of Transportation structure number)
BH 37384 (Bridgehunter.com ID)
Inspection (as of 09/2011)
Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 54.8 (out of 100)
Average daily traffic (as of 2010)
15,900

Categories 

Built 1930 (1,238)
Built during 1930s (8,553)
Clatsop County, Oregon (23)
Concrete balustrade (424)
Concrete girder (520)
Conde B. McCullough (98)
Deck girder (1,800)
F. L. Odom (2)
Functionally obsolete (7,036)
Girder (3,236)
 HAER documented (781)
Have street view (9,883)
Open (28,305)
Oregon (689)
Owned by state (9,807)
Seaside, Oregon (2)
Span length 50-75 feet (6,995)
Total length 175-250 feet (2,789)
US 101 (90)

Update Log 

  • April 24, 2011: New photos from K. A. Erickson
  • April 27, 2010: New Street View added by Michael Goff
  • April 20, 2009: Posted HAER photos
  • October 29, 2008: Updated by Michael Goff: Edited Builders
  • October 7, 2008: Updated by Michael Goff: Added design description and builder
  • September 8, 2008: Added by Michael Goff

Sources 

  • Mike Goff - michael [dot] goff [at] hotmail [dot] com
  • HAER OR-129 - Neawanna Creek Bridge, Spanning Neawanna Creek at Milepoint 19.72 on U.S. 101 (Oregon Coast Highway), Seaside vicinity, Clatsop County, OR
  • K. A. Erickson

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