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Lewis and Clark River Bridge

Lewis and Clark River Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: September 1, 2018

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and Videos
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and Links

Key Facts

Facility Carried / Feature Intersected
Business US-101 (Warrenton-Astoria Highway) Over Lewis and Clark River
Location
Astoria: Clatsop County, Oregon: United States
Structure Type
Metal 7 Panel Rivet-Connected Pratt Deck Truss, Movable: Single Leaf Bascule (Fixed Trunnion) and Approach Spans: Wood Stringer (Multi-Beam), Fixed
Construction Date and Builder / Engineer
1924 By Builder/Contractor: Unknown and Engineer/Design: Conde Balcom McCullough (Oregon State Highway Commission)

Technical Facts

Rehabilitation Date
2015
Main Span Length
112 Feet (34 Meters)
Structure Length
870 Feet (265 Meters)
Roadway Width
19 Feet (5.79 Meters)
Spans
1 Main Span(s) and 38 Approach Span(s)
NBI Number
711

Historic Significance Rating (HSR)

Bridge Documentation

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

View Historic American Engineering Record (HAER) Documentation For This Bridge

HAER Data Pages, PDF

View Historic Bridge Inventory Sheet For This Bridge

This is a rare example of a single leaf highway bascule bridge, since most highway bascule bridges are double-leaf, with only railroads preferring single-leaf designs. The bridge includes a long timber approach causeway. However, in 2015, the western approach was replaced. In the photo gallery, some of the photos are from ODOT and show the original timber approach spans, which are today concrete. The bascule span itself retains good historic integrity however.

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Photo Galleries and Videos: Lewis and Clark River Bridge

 
View Photo Gallery
Bridge Photo-Documentation
Original / Full Size Photos
A collection of overview and detail photos. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Photo Gallery
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: Lewis and Clark River Bridge

Coordinates (Latitude, Longitude):

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Bridgehunter.com: View listed bridges within a half mile of this bridge.

Bridgehunter.com: View listed bridges within 10 miles of this bridge.

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Flickr Gallery (Find Nearby Photos)

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USGS National Map (United States Only)

Historical USGS Topo Maps (United States Only)

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