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Winchester I-5 Bridges

Winchester I-5 Bridges

Primary Photographer(s): Nathan Holth

Bridge Documented: September 2, 2018

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Key Facts

Facility Carried / Feature Intersected
I-5 Over North Umpqua River
Location
Winchester: Douglas County, Oregon: United States
Structure Type
Metal 8 Panel Rivet-Connected Warren Deck Truss, Fixed and Approach Spans: Concrete T-Beam, Fixed
Construction Date and Builder / Engineer
1955 By Builder/Contractor: Unknown and Engineer/Design: P. Mervyn Stephenson and Theodore C. Roake

Technical Facts

Rehabilitation Date
1979
Main Span Length
140 Feet (43 Meters)
Structure Length
1,637 Feet (499 Meters)
Roadway Width
28 Feet (8.53 Meters)
Spans
5 Main Span(s) and 13 Approach Span(s)
NBI Number
07663C001

Historic Significance Rating (HSR)
View Information About HSR Ratings

Bridge Documentation

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

This bridge is a good example of mid 20th century riveted truss bridge construction. Riveted truss bridges are a relatively uncommon sight on Interstate Highways. This is in fact a pair of bridges with different construction dates. The northbound bridge (and primary focus of this listing on HistoricBridges.org) dates to 1955. The southbound bridge is nearly identical and was built in 1964 under the direction of bridge engineer Ivan D. Merchant. A notable difference with the southbound bridge is that bolts were used instead of rivets for field connections (shop fasteners are rivets), a testimony to the changing trends in construction that took place between the construction dates of these two bridges.

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Photo Galleries and Videos: Winchester I-5 Bridges

 
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Bridge Photo-Documentation
Mobile Optimized Photos
A collection of overview and detail photos. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer

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Maps and Links: Winchester I-5 Bridges

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