Rating:
3 votes

Ross Island Bridge

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Ross Island Bridge

Photo taken by Michael Goff on July 6, 2008

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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

Update Log 

  • April 13, 2010: New Street View added by James Baughn
  • March 5, 2010: Posted HAER photos
  • May 11, 2009: New photos from Michael Goff
  • July 8, 2008: Updated by Michael Goff
  • July 7, 2008: New photos from Michael Goff
  • June 7, 2008: Changed name, corrected county

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