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Portland Water Bureau

From forest to faucet, we deliver the best drinking water in the world.


1120 SW Fifth Ave, Suite 600, Portland, OR 97204

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Sandy River Bridge Disposition

Sandy River conduit bridge needs a new home...

Sandy River Conduit Bridge

The Portland Water Bureau (PWB) is seeking a home for a 115 year-old steel pin-truss historic bridge.

The Sandy River Conduit #2 and #4 Bridge once crossed the Sandy River in rural Clackamas County. Until recently, it was the oldest bridge in Oregon that performed its original task—carrying the drinking water conduits that supplied water to a quarter of the state’s population. 

The conduits have been removed and placed under the Sandy River in order to reduce their vulnerability to human and natural hazards. That leaves a historic bridge ready to be put into use elsewhere.

The Oregon State Historic Preservation Office (SHPO) has determined that the bridge is eligible for listing in the National Register of Historic Places. This designation, under state and federal law, finds that the removal of the bridge from its current site constitutes the loss of a historic resource. In order to mitigate the effect of having the Bridge removed from its current location, the Portland Water Bureau (PWB) and SHPO have agreed that it is in the public interest to attempt to find an organization or agency that will use the bridge in a new location. Under SHPO requirements, if the bridge has not been relocated and reused after three years, the PWB may recycle it as scrap metal.

The 300-ft. long, 14-ft. wide bridge is in good condition and can be reused for pedestrian and bike use with prudent upgrades. The bridge has been determined to be eligible for listing in the National Register of Historic Places. Due to the historic nature of the bridge, the PWB has carefully disassembeld the bridge so that it can be reused in a new location. This bridge is an integral part of the PWB’s history and the agency is motivated to preserve it for future generations at a new location.

As part of the bureau’s efforts to educate potential users of the bridge, the PWB has developed a package of information, all of which can be downloaded by clicking on the links below. A CD containing all the documents is available as well.

1)       Sandy River Bridge Truss Components Baseline Condition Assessment, January 2008

2)       Key Historic Drawings of the Conduit Bridge

3)       Photo album of the bridge

4)       Sandy River Crossing Environmental Assessment Report of USACE 404 permit

5)       SHPO 106 Level of Effect Report

6)       Conduit 2 and 4 Bridge Inspection Information, 1996

7)       Bull Run Pipeline and Bridges Foundation Inspections, 1998

8)       PB Americas Bridge Removal Strategies– October 2007

Frequently Asked Questions about the bridge disposition.

Additional Information
For more information on acquiring this piece of Oregon's history, contact Kevin Larson, Engineering Services Group, at 503-823-7210.