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Siuslaw River Bridge Cathodic Protection

New Information                                          

May 19, 2017 Update
Siuslaw Bridge Cathodic Protection Project Update
For May 19 - 30:
No work is occuring during the Rhododendron Festival or
over Memorial Day Weekend.
  • Crews are sand blaskting on the south side of the bridge and continuing rail installation on the north side.  
  • Work hours are 4 a.m. to 4 p.m. for different project tasks, Monday through Thursday. No work will occur on Friday, May 26.
  • Expect some lane closures during the day. Delays may be up to 20 minutes, but will normally be five minutes or less.   
  • Most work has moved to the south end of the bridge but there will continue to be a staging yard near the north end.
Background: The Siuslaw River Bridge Cathodic Protection Project is repairing damaged concrete, replacing bridge railings, and constructing sidewalk features at the bridge ends. A major portion of the project is to install cathodic protection that includes a zinc surface coating to protect the structure from corrosion. Sandblasting the bridge and spraying the zinc coating are noisy operations that must be done separately, in containment structures. The project is scheduled to be completed in March 2019. 
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Learn about the project by viewing this video.

Learn what to expect during construction.  Click here.

Learn about what will happen to the bridge rails. Bridge rail repurpose plans and a video. (1:38)



 The Siuslaw River Drawbridge, at the south end of Florence on U.S. 101 in Lane County,  is scheduled for rehabilitation work.  A cathodic protection system and structural repairs are needed to protect the bridge from deterioration due to age and the harsh coastal environment; these repairs will allow the structure to remain in service for many years to come.

This project will repair damaged concrete, replace bridge railings and construct sidewalk features at the bridge ends.  One major component of the project is to install cathodic protection that includes a zinc surface coating to protect the structure from corrosion.
The harsh coastal climate presents a challenging environment for large reinforced-concrete structures.  Engineers discovered that installing a zinc surface coating on coastal bridges forces that metal to corrode instead of the reinforcing steel within the concrete—thus extending the lives of these wonderful spans.
 To learn more about project details, click on the above image.



The Siuslaw River Drawbridge was first opened to traffic in 1936, it is one of Oregon’s original historic coastal bridges designed in the Art Deco style by Oregon’s renowned state bridge engineer, Conde McCullough and is listed on the National Register of Historic Places.  The bridge cost $527,000 to construct. The federal Public Works Administration provided funding.

The Florence bridge was one of five major structures built as part of Oregon’s Coast Bridges Project. Like the other bridges completed on the Oregon Coast Highway in 1936, the Siuslaw River Bridge replaced ferry service across one of Oregon’s major rivers. The bridge was built by the Mercer-Fraser Company, Eureka, California.





To learn more about the history, click on this image.






Hamilton Construction Co. was awarded the low-bid contract of $14.2 million.  Construction is expected to take three years.  Most of the work will take place inside segmented, moveable containment structures which will be suspended from the bridge. The center navigable water channel will be kept open to accommodate boat traffic. Impact to traffic on the bridge will be periodic single lane restrictions. 
This project will not result in complete closures of the bridge.  The project will result in intermittent nighttime, single lane restrictions during construction.
This project will not result in the permanent elimination of the parking under the north end of the bridge.  The project will result in the closure of access to the location during 5 to 6 months of the 3-and-a-half-year project.
To see a map of the construction area, click on this image.


Project Library                                             

Public Open House #1:  November 19, 2014

Project Information Paper 

Letter to the public



Shane Prohaska, Project Coordinator, (541) 799-5412
Angela Beers Seydel, Public Information Officer, (541)726-2442