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Steel Bridge

from the west bank of the Willamette River

Photo taken by Michael Goff on April 11, 2008

Overview: Vertical-lift through truss bridge over Willamette River on OR 99W in Portland
Location: Portland, Multnomah County, Oregon
Status: Open to highway and light rail traffic on upper deck; bicycle/pedestrian and rail traffic on lower deck
History: Built 1912
Builders: - Oregon-Washington Railroad and Navigation Co. (Builder)
- Robert Wakefield (Superstructure Contractor)
- Union Bridge & Construction Co. (Substructure Contractor)
- Waddell & Harrington (Engineering Firm)
Design: Pratt through truss
Dimensions: Length of largest span: 299.9 ft.
Total length: 799.9 ft.
Deck width: 49.9 ft.
Vertical clearance above deck: 17.8 ft.
Recognition: Eligible for the National Register of Historic Places
Approximate latitude, longitude: +45.52750, -122.66889 (decimal degrees)
45°31'39" N, 122°40'08" W (degrees°minutes'seconds")
Approximate UTM coordinates: 10/525856/5041604 (zone/easting/northing)
USGS topographic map: Portland
Inventory numbers: OR 06683 (Oregon Dept. of Transportation structure number)
BH 29900 (Bridgehunter.com ID)
Inspection (as of 05/2009): Deck condition rating: Fair (5 out of 9)
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 47.9 (out of 100)
Average daily traffic (as of 2010): 24,216

Mike Goff - michael [dot] goff [at] hotmail [dot] com
Wikipedia
HAER OR-21 - Steel Bridge, Spanning Willamette River at State Route 99, 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