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Newberg Bridge

Champoeg Road Bridge

Newberg Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: September 2, 2018

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Key Facts

Facility Carried / Feature Intersected
Pipeline (Formerly Champoeg Road) Over Willamette River
Newberg: Yamhill County, Oregon and Marion County, Oregon: United States
Construction Date and Builder / Engineer
1914 By Builder/Contractor: Coast Bridge Company of Portland, Oregon

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
315 Feet (96 Meters)
Structure Length
735 Feet (224 Meters)
Roadway Width
20 Feet (6.1 Meters)
3 Main Span(s)
NBI Number
Not Applicable

Historic Significance Rating (HSR)
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Bridge Documentation

View Historic Bridge Inventory Sheet For This Bridge

View Historical State Highway Report Excerpt Discussing This Bridge

A former highway bridge that only carries a pipeline today, this is a very unusual design of cantilever truss bridge. The bridge does not try to visually hide the fact that it is a cantilever design. The deck truss cantilever arms are clearly identifiable as such as they extend out from the piers with an ever-decreasing depth, and they hold a pony truss span in the center, with that transition from deck truss to pony truss being abrupt. With most traditional cantilever truss bridges, the center span would be called a suspended span as it would be hung from the cantilever arms with hangers. With this bridge however, it instead bears on top of the cantilever arms, and again visually this design is not hidden at all; the pony truss looks exactly like a simple span pony truss one might find spanning a small creek.

The Coast Bridge Company of Portland, Oregon erected the substructure and superstructure of the bridge, using steel fabricated by Northwest Steel Company of Portland, Oregon.

This is one of the most unusual cantilever truss bridges in the country, and also noted as a very old bridge in Oregon, particularly among Willamette River bridges, and the bridge is highly significant as a result. Despite the conversion to a pipeline bridge, the actual truss structure appears to retain good historic integrity.


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