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Ross Island Bridge

Ross Island Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: September 3, 2018

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Facility Carried / Feature Intersected
US-26 Over Willamette River and Various Streets and Railroad
Location
Portland: Multnomah County, Oregon: United States
Structure Type
Metal Cantilever 40 Panel Rivet-Connected Modified Warren (Subdivided) Deck Truss, Fixed and Approach Spans: Metal 24 Panel Rivet-Connected Modified Warren (Subdivided) Deck Truss, Fixed
Construction Date and Builder / Engineer
1926 By Builder/Contractor: Booth and Pomeroy of Portland, Oregon and American Bridge Company of New York, New York and Engineer/Design: Gustav Lindenthal
Rehabilitation Date
2000
Main Span Length
535.0 Feet (163.1 Meters)
Structure Length
3,653.0 Feet (1113.4 Meters)
Roadway Width
43 Feet (13.11 Meters)
Spans
3 Main Span(s) and 31 Approach Span(s)
Inventory Number
5054

Historic Significance Rating (HSR)
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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

HAER Documentation, Willamette River Bridges - Data Pages - Drawings -Timeline

View Historical Articles About This Bridge

This unique bridge has the appearance of an arch bridge. However in design it functions as a cantilever truss bridge, with no suspended span. This is an unusual design, but also a very attractive one. The bridge is one of several bridges in Portland designed by famous engineer Gustav Lindenthal. This one is one of the most significant and unique examples of his work in the city. The bridge retains good historic integrity with no major alterations to the main truss spans. The length of all truss spans, main and approach spans combined is 1,819 feet.

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Photo Galleries and Videos: Ross Island Bridge

 

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Maps and Links: Ross Island Bridge

Coordinates (Latitude, Longitude):

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Bridgehunter.com: View listed bridges within 0.5 miles (0.8 kilometers) of this bridge.

Bridgehunter.com: View listed bridges within 10 miles (16 kilometers) of this bridge.

HistoricBridges.org Bridge Browser: View listed bridges within 0.5 miles (0.8 kilometers) of this bridge.

HistoricBridges.org Bridge Browser: View listed bridges within 10 miles (16 kilometers) of this bridge.

2021 National Bridge Inventory: View listed bridges within 0.5 miles (0.8 kilometers) of this bridge.

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