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Budget Information

I-5 - S. 272nd St. to S. Rose St. Seismic Retrofit - Complete November 2015

Project Status - Complete
A small map of the project area.
View a larger map of the project area.

A small photo of bridge girders prior to the seismic retrofit work.
Bridge columns, the crossbeam and girders of a bridge before a seismic retrofit.

A small photo of a seismically retrofitted bridge on I-5.
A bridge after it has been seismically retrofitted.

View larger photos.

WSDOT seismically retrofitted eight bridge sections of Interstate 5 between South 272nd Street in Kent to South Rose Street in South Seattle.

Contractors added steel jacket columns around the bridge piers to reduce the risk that the columns will fail in an earthquake.

They also added girder stops to prevent bridge girders from sliding from side to side in a earthquake and support bolsters which provide a wider base for the bridge girders to rest upon.  

This work is part of the state's seismic retrofit program.

How You Benefit
Cross GlyphImproves Safety
This retrofitting work brought these sections of I-5 up to current seismic standards.

Strengthening bridge columns, crossbeams and the girders helps keep drivers safer by reducing the risk of damage in an earthquake. Concrete columns are less like to crumble and bridge girders are less likely to slide off.
Dollar Sign Glyph Economic Incentive
Interstate 5 is the primary corridor for moving people and freight through Washington.

Seismically retrofitting the bridge helps reduce the risk that commerce will be disrupted after an earthquake. Ensuring the movement of people and goods will help the region recover faster.

Partnerships & Cooperation
WSDOT worked with cities throughout the project corridor to coordinate road closures and community engagement.


Financial Data for PIN 100506K, 100507C
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $11,895
CWA $0
Total $11,895

Contact Us
WSDOT Communications
15700 Dayton Avenue N.
Seattle, WA 98133

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