Project Facts
- WSDOT is working to upgrade all bridges in the Puget Sound area to current seismic standards.
- Central Puget Sound has two seismic zones with the highest ground movement in the state.
- The 2005 Transportation Partnership Package includes funding for more bridge projects in the region.
May 2008
- The design phase is under way.
- This project will be advertised to contractors in October 2008.
WSDOT will bring 16 bridges up to current earthquake standards on Interstate 90 between Richards Road and Winery Road.
Why is WSDOT
improving bridges on I-90?
Bringing these bridges to current seismic standards will reduce the chance of failure during an earthquake.
The End Result
Crews will retrofit the bridges by strengthening columns to prevent girders from falling off the bridge piers during an earthquake. Once retrofitted, the bridges will be able to withstand greater seismic stress caused by earthquakes.
Some of the bridges include:
- Richards Road overpass
- I-90 on- and off-ramps to Richards Road
- 150th Avenue SE overpass
- Front Street overpass
- West Lake Sammamish Parkway overpass
Project Benefits
- Safety: Improving the bridges will reduce the risk of catastrophic failure during an earthquake.
- Environment: Crews will filter storm water runnoff during construction.
What is the project timeline?
- October 2008: We will publicly advertise this project to contractors.
- November 2008: We will select the most competitive contractor.
- December 2008: Construction begins
- October 2009: Estimated completion
Public Involvement
Your thoughts and opinions are important to us. If you have further questions or comments, please contact the project office.
Environmental Protection
During construction crews will filter stormwater runoff from the roadway and construction activities. Wetlands will be identified and protected by construction fencing.
Please visit the WSDOT Environmental
Services Web site for more information.
Increasing safety is one of our priorities
Once retrofitted, the bridges will be able to withstand greater seismic stress caused by earthquakes, reducing the risk of catastrophic failure.
Will this project impact tribal resources?
This project was determined to be exempt from Section 106 Consultation per the Programmatic Agreement between the Washington State Department of Transportation, the Federal Highway Administration, the Advisory Council on Historic Preservation, and the State Historic Preservation Officer signed July 18, 2000.
At WSDOT we seek to address the concerns of the tribal nations using the process outlined in Section 106 of The National Historic Preservation Act and the WSDOT Tribal Consultation Policy adopted in 2003 by the Transportation Commission as part of the WSDOT Centennial Accord Plan.
Financial Information
This project is funded through the following sources:
- 2005 Gas Tax (Partnership Funding) - $7.7 million
- Existing Funds - $1.7 million
- Total Funding Available From All Sources - $9.4 million
How can I get more information?
Contact:
Hung Huynh
WSDOT Project Engineer
15700 Dayton Avenue North
PO Box 330310
Seattle, WA 98133
Phone: 206-440-4311, or
E-mail: HuynhH@wsdot.wa.gov
or
Mike Murphy
WSDOT Communications
15700 Dayton Avenue North
PO Box 330310
Seattle, WA 98133
Phone: 206-440-4699, or
E-mail: MurphyM@wsdot.wa.gov
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