Photos
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Alexandra Ave. Bridge Photo taken by Michael Goff on June 1, 2008 |
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Alexandra Avenue Bridge - Deck View Photo taken by Michael Goff on September 29, 2008 |
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Alexandra Avenue Bridge - Information Plaque Photo taken by Michael Goff on September 29, 2008 |
Facts
- Overview
- Concrete arch bridge over a canyon on NW Alexandra Avenue in Portland
- Location
- Portland, Multnomah County, Oregon
- Status
- Open to traffic
- History
- Built 1922
- Builders
- - Fred T. Fowler (Design Engineer)
- Lindstrom & Feigenson (Contractor)
- Olaf Laurgaard (Lead Engineer)
- Design
- 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) - Dimensions
-
Length of largest span: 149.9 ft.
Total length: 272.0 ft.
Deck width: 16.1 ft.
- Recognition
- 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
- 10/521642/5043039 (zone/easting/northing)
- USGS topographic map
- Portland
- Inventory number
- BH 29850 (Bridgehunter.com ID)
- Inspection (as of 09/2004)
- Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Good (7 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 51.7 (out of 100) - Average daily traffic (as of 2002)
- 105
Update Log
- 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
Sources
- James Baughn - webmaster [at] bridgehunter [dot] com
- Michael Goff - michael [dot] goff [at] odot [dot] state [dot] or [dot] us