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West Multnomah Falls Viaduct

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West Multnomah Fall Viaduct

Photo taken by Michael Goff on January 10, 2009

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Facts 

Overview
Bridge over rocky terrain along railroad tracks on Historic Columbia River Highway
Location
Multnomah County, Oregon
Status
Open to traffic
History
Built 1914
Builders
- Charles H. Purcell (Bridge Engineer)
- Karl P. Billner (Design Engineer)
- Pacific Bridge Co. of Portland, Oregon (Contractor)
Design
This 400' half-viaduct was an engineer's solution to aligning the Historical Columbia River Highway between a steep unstable slope and the Oregon Washington Railroad and Navigation Company main line right-of-way. It is a companion to the East Multnomah Falls Viaduct.
(HAER No. OR-36-J)
Dimensions
Length of largest span: 20.0 ft.
Total length: 401.9 ft.
Deck width: 17.4 ft.
Approximate latitude, longitude
+45.57639, -122.12028   (decimal degrees)
45°34'35" N, 122°07'13" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/568636/5047359 (zone/easting/northing)
Quadrangle map:
Multnomah Falls
Inventory numbers
OR 00840 (Oregon Dept. of Transportation structure number)
BH 37536 (Bridgehunter.com ID)
Inspection (as of 09/2015)
Deck condition rating: Poor (4 out of 9)
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 4.0 (out of 100)
Average daily traffic (as of 2014)
3,600

Update Log 

  • March 31, 2011: New photos from Michael Goff
  • September 8, 2010: New Street View added by Michael Goff
  • January 12, 2009: New photos from Michael Goff
  • October 7, 2008: Added by Michael Goff

Sources 

  • Mike Goff - michael [dot] goff [at] hotmail [dot] com
  • Historic Highway Bridges of Oregon - Dwight A. Smith, James B. Norman & Pieter T. Dykman, Oregon Historical Society Press, 1989
  • HAER OR-36-G - Historic Columbia River Highway, West Multnomah Falls Viaduct, West of Multnomah Falls on Historic Columbia River Highway, Troutdale vicinity, Multnomah County, OR