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Siuslaw River Bridge Cathodic Protection Project

Project Completed

Region 2: Willamette Valley and Northwest Oregon (Florence, Lane)

​We are repairing damaged concrete, replacing bridge railings, and constructing sidewalk features at the bridge ends, in addition to installing a cathodic protection that includes a zinc surface coating to protect the structure from corrosion.​​


Traffic Impact

​Expect intermittent lane closures on the bridge and some sidewalk closures.

In response to pedestrian concerns, the following safety changes have been implemented:

  • The speed limit through the work zone has been reduced to 30 mph.
  • Additional signs identifying pedestrian crossing zones have been added.
  • Pedestrians may be assisted by a flagger through any blocked sections of the open sidewalk in the work zone. Sometimes it is necessary to work from both sidewalks.
  • Variable message signs warning drivers to be aware of bikes and pedestrians have been added.
  • Oregon State Police will be focusing additional safety enforcement on the south side of the bridge.

Construction Impacts

​Sandblasting the bridge, spraying zinc coating, and removing bridge rails are noisy. Expect intermittent single lane closures on the bridge.


T​he project began in 2015. All work is scheduled to be completed in March 2019.



This three and a half year project (2015-19) will apply a cathodic protection treatment to the concrete of the bridge to protect it from corrosion.


N/A | ​U.S. 101, milepost 190.84 to 191.15, crossing the Siuslaw River in Florence

Cost and Funding

​$19.9 million


​Hamilton Construction Co. (Springfield)

Additional Information

​The Siuslaw River Drawbridge opened to traffic in 1936, and is one of Oregon's original historic coastal bridges designed by Conde McCullough and listed on the National Register of Historic Places. Bridge rails that are being replaced are being repurposed.  Hamilton Construction has partnered with BRING Recycling to make rails available to local organizations and others interested in these pieces of history.

Contacts & Media


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Project Contacts

Resident Engineer
Steve Templin

Public Information Officer
Angela Beers Seydel

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Last Updated

12/3/2019 10:44 AM

Project Number


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