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Martin Luther King Jr. Blvd Viaduct


MLK Viaduct - 1936

Nearly finished viaduct

Photo from the Oregon Department of Transportation Website

View this photo at oregon.gov

BH Photo #122054


Stringer bridge over UPRR & Division Street on Oregon 99E in Portland
Portland, Multnomah County, Oregon
Replaced by a new bridge
Built 1937, Replaced 2008-2009
- Hoffman Construction Co. (Contractor)
The original Martin Luther King, Jr., Boulevard (Union Avenue) portion of the structure was built by Hoffman Construction Company of Portland in 1936, at a cost of $459,000. This Roosevelt-era Works Progress Administration project brought many needed jobs to Portland-area residents. The Grand Avenue couplet was added to the viaduct in 1965. The viaducts provide Oregon Route 99E with a grade-separated crossing over the Union Pacific Railroad tracks.
Information from the Oregon Department of Transportation MLK Viaduct Project Website, August 2008
Length of largest span: 60.0 ft.
Total length: 1,639.2 ft.
Deck width: 48.2 ft.
Also called
MLK Viaduct
Union Avenue Viaduct
Approximate latitude, longitude
+45.50583, -122.66083   (decimal degrees)
45°30'21" N, 122°39'39" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/526495/5039200 (zone/easting/northing)
Quadrangle map:
Average daily traffic (as of 2008)
Inventory numbers
OR 02115 (Oregon Dept. of Transportation structure number)
BH 37252 (Bridgehunter.com ID)
Inspection report (as of January 2010)
Overall condition: Poor
Superstructure condition rating: Serious (3 out of 9)
Substructure condition rating: Serious (3 out of 9)
Deck condition rating: Serious (3 out of 9)
Sufficiency rating: 2 (out of 100)
View more at BridgeReports.com

Update Log 

  • March 23, 2011: New photos from Michael Goff
  • August 20, 2008: Added by Michael Goff


  • Mike Goff - michael [dot] goff [at] hotmail [dot] com
  • MLK Viaduct Replacement Project: - Oregon Department of Transportation project website for the replacement of the MLK Viaduct
  • HAER OR-132 - Union Avenue Viaduct, Spanning between Southeast Harrison & Southeast Ivon Streets on Union Avenue (Old Highway 99 East), Portland, Multnomah, OR