Bridgehunter.com | East Multnomah Falls Viaduct

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East Multnomah Falls Viaduct

Photo taken by Michael Goff in June 2011

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 Oakland, California (Contractor)
Design: This 860' half-viaduct was an engineer's solution to aligning the Historic 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 West Multnomah Falls Viaduct
HAER No. OR-36-G
Dimensions: Length of largest span: 9.8 ft.
Total length: 860.9 ft.
Deck width: 17.4 ft.
Approximate latitude, longitude: +45.57861, -122.11333 (decimal degrees)
45°34'43" N, 122°06'48" W (degrees°minutes'seconds")
Approximate UTM coordinates: 10/569175/5047612 (zone/easting/northing)
USGS topographic map: Multnomah Falls
Inventory numbers: OR 00841 (Oregon Dept. of Transportation structure number)
BH 37534 (Bridgehunter.com ID)
Inspection (as of 09/2011): Deck condition rating: Poor (4 out of 9)
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Poor (4 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 13.2 (out of 100)
Average daily traffic (as of 2010): 4,600

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-J - Historic Columbia River Highway, East Multnomah Falls Viaduct, East of Multnomah Falls, Troutdale vicinity, Multnomah County, OR