The Alexandra Avenue Viaduct is an important example of braced spandrel construction, similar to that of Latourell Creek Bridge in the Columbia River Gorge. The arch ribs are not a continous structure, but consist of ten seperate chord members arranged in an arch form. The bridge features concrete trestle approach spans at each approach. The steel handrailing replaced the original precast panel concrete railing.
(Historical Highway Bridge of Oregon - 1989)
Length of largest span: 149.9 ft.
Total length: 272.0 ft.
Deck width: 16.1 ft.
Eligible for the National Register of Historic Places
Approximate latitude, longitude
+45.54056, -122.72278(decimal degrees) 45°32'26" N, 122°43'22" W (degrees°minutes'seconds")
Approximate UTM coordinates
USGS topographic map
BH 29850 (Bridgehunter.com ID)
Inspection (as of 09/2011)
Deck condition rating: Satisfactory(6 out of 9) Superstructure condition rating: Satisfactory(6 out of 9) Substructure condition rating: Satisfactory(6 out of 9) Appraisal: Functionally obsolete
Sufficiency rating: 51.6 (out of 100)
Average daily traffic (as of 2010)
June 7, 2012: Updated by Nathan Holth: This is not a concrete truss, it is a spandrel braced arch.
September 7, 2010: New Street View added by Michael Goff
November 17, 2008: Updated by Michael Goff: Added Builders
September 30, 2008: New photos from Michael Goff
June 25, 2008: New photo from Michael Goff
Mike Goff - michael [dot] goff [at] hotmail [dot] com