Bridgehunter.com | Arrah Wanna Road Bridge

Share:

Photos

Arrah-Wanna Road Bridge

Photo taken by Michael Goff on April 27, 2008

Enlarge

Map

Facts

Overview: Polygonal Warren pony truss bridge over Salmon River on Arrah Wanna Road
Location: Clackamas County, Oregon
Status: Open to traffic
Future prospects: Slated for demolition and replacement in May 2012.
History: Built 1957
Builder: - Coast Bridge Co. of Portland, Oregon (Truss Design and Fabrication)
Design: Polygonal Warren pony truss
Dimensions: Length of largest span: 100.0 ft.
Total length: 117.1 ft.
Deck width: 15.0 ft.
Approximate latitude, longitude: +45.33849, -121.97372 (decimal degrees)
45°20'19" N, 121°58'25" W (degrees°minutes'seconds")
Approximate UTM coordinates: 10/580409/5021065 (zone/easting/northing)
USGS topographic map: Rhododendron
Inventory numbers: OR 06572 (Oregon Dept. of Transportation structure number)
BH 29852 (Bridgehunter.com ID)
Inspection (as of 07/2011): Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 29.2 (out of 100)
Average daily traffic (as of 2010): 200

Update Log

April 16, 2012: Updated by Nathan Holth: This bridge is now doomed.
June 10, 2008: New photos from Michael Goff

Sources

Mike Goff - michael [dot] goff [at] hotmail [dot] com
Nathan Holth

Comments

Arrah Wanna Road Bridge

Posted March 14, 2011, by Michael Goff (michael [dot] goff [at] odot [dot] state [dot] or [dot] us)

Here is an interesting article from Portland's Oregonian about a couple who is trying to adopt the Arrah Wanna Road Bridge over the Salmon River. I wish them luck on the endeavor.

http://www.oregonlive.com/clackamascounty/index.ssf/2011/03/bob_and_margaret_thurman_of_br.html

On a side note related to the article, I browsed the ODOT records and found the standard drawing that dates from 1911 for this type of pony truss. These standard drawings pre-date the 1913 creation of the highway department and were developed by the Coast Bridge Company of Portland, Oregon. Thanks to this, I believe I can now trace this standard design to at least a couple of different pony truss bridges in the state.

Another step forward in determining the origin of these turn of the century relocated trusses!