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Siuslaw River Bridge Cathodic Protection


 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.

ODOT Engineers are currently designing plans to 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.






The project will be bid in 2015 and construction is expected to take three years.  Temporary work bridges are needed for construction and will be erected alongside the structure except in the center navigable water channel which will be kept open to accommodate boat traffic. Impact to traffic on the bridge will be minor.  To learn more about what to expect, click here.
This project will not result in complete closures of the bridge.  The project will result in nighttime, single lane closures during a short duration of 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 15 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



Jeffrey Lange, Project Leader, (541) 744-8080
Rick Little, Public Information Officer, (541)726-2442