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Ross Island Bridge

Photo taken by Michael Goff on July 6, 2008

Overview: Cantilevered steel arch bridge over Willamette River on US 26 in Portland
Location: Portland, Multnomah County, Oregon
Status: Open to traffic
History: Built 1926; rehabilitated 2000-01
Builders: - American Bridge Co. of New York (Steel Fabricator)
- Booth & Pomeroy (Steel Erector)
- Gustav Lindenthal (Engineer)
- Lindstrom & Feigenson (Contractor Approach Spans)
Design: Cantilevered steel arch
Dimensions: Length of largest span: 535.0 ft.
Total length: 3,649.1 ft. (0.7 mi.)
Deck width: 43.0 ft.
Vertical clearance above deck: 41.5 ft.
Recognition: Eligible for the National Register of Historic Places
Approximate latitude, longitude: +45.50126, -122.66454 (decimal degrees)
45°30'05" N, 122°39'52" W (degrees°minutes'seconds")
Approximate UTM coordinates: 10/526207/5038690 (zone/easting/northing)
USGS topographic map: Portland
Inventory numbers: OR 05054 (Oregon Dept. of Transportation structure number)
BH 29899 (Bridgehunter.com ID)
Inspection (as of 08/2009): Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 32.4 (out of 100)
Average daily traffic (as of 2010): 46,300

I-5 - Marquam Bridge (Downstream) - Future light rail suspension bridge between structures
Sellwood Bridge (Upstream)

Mike Goff - michael [dot] goff [at] hotmail [dot] com
Wikipedia
HAER OR-102 - Ross Island Bridge, Spanning Willamette River at Powell Boulevard, Portland, Multnomah County, OR
Historic Highway Bridges of Oregon - Dwight A. Smith, James B. Norman & Pieter T. Dykman, Oregon Historical Society Press, 1989
Bridges of Portland - Ray Bottenberg, Arcadia Publishing, 2007
The Portland Bridge Book - Sharon Wood Wortman, Oregon Historical Society Press, 2001