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SR 9 - 212th St SE to 176th St SE - Widening (Stage 3)

This widening project
runs from SR 524 north of Bothell to 176th St SE in Clearview.

Bike detour for SR 9 construction

During construction, bicyclists will follow a marked detour around the construction zone.

Modified jet engine is used to dry the pavement on SR 9 as contractors prepare to place the final layer of new asphalt on top

A modified jet engine is used to dry the pavement on SR 9 in Clearview. The dryer is used to make sure the surface is completely dry before placing a final layer of asphalt. Check out more pictures of the widening project.

  Other projects on SR 9 in Snohomish County.


November 2014

  • The project was operationally complete Nov. 22, 2013. Operationally complete means the roadway is open and the majority of the work is finished.
  • Our weekly construction schedule provides updates on additional work for the current and upcoming week.
  • Check the U-turn map to find out where drivers can turn around on the highway with the new center median now in place.
  • Stay in the loop about projects and issues in Snohomish County - sign up for regular e-mail updates.

We are widening more than two miles of State Route 9 from a two-lane road to a four-lane divided highway from SR 524 north of Bothell to 176th St SE in the community of Clearview.

Why is WSDOT widening SR 9 from north of Bothell to Clearview?
Rapid population growth in Snohomish County has increased traffic on SR 9. The highway is now an important corridor for both commercial vehicles and commuters. Current traffic volumes have exceeded the capacity of the two-lane roadway leading to congestion and delay during peak travel times.

Congestion-related collisions - like sideswipe and rear-end collisions - have also increased along SR 9. From 2000 to 2003, there were an average of 395 collisions per year on SR 9 in Snohomish County. Between 2004 and 2007, that average had increased to almost 480 collisions per year.

The End Result
We will double the number of through lanes on SR 9 and provide additional turn lanes at the 180th St SE intersection. We will also add a raised median to separate oncoming traffic and limit access points for turning drivers. These improvements will provide better driving conditions and improve safety on the highway.

Project Benefits
• Safety. To reduce the risk of serious collisions, we will add a raised median to most of this segment of SR 9. Raised medians work by eliminating left turns across oncoming traffic at access points on busy roads. Controlling where traffic can go minimizes the conflicts that lead to collisions. We will also bring this stretch of highway up to the most current safety standards for intersections, guardrail, pavement marking and elimination of roadside hazards.

• Congestion relief. We will improve capacity and traffic flow by adding two lanes to the existing roadway. The raised median will also help reduce the congestion that results from frequent and closely-spaced driveways and side streets on busy highways.

What is the project timeline?
Feb. 7, 2008 - Open house at Horseshoe Grange in Snohomish

Sept. 23, 2009 - Open house at Valley View Middle School in Snohomish

Oct. 27, 2010 - Open house at Valley View Middle School in Snohomish

April 18, 2011 - Advertised for competitive bidding 

June 23, 2011 - Project awarded to Northwest Construction, Inc., for $24.2 million

Aug. 8, 2011 - Begin construction

Friday, Nov. 22 - The project is operationally complete.

Spring 2014 - Complete final paving, pavement markings, drainage and other minor work.

Financial Information

Financial Data for PIN 100900F
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $53,791
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $330
Total $54,121

Project signage will reflect the cost of construction engineering, project bid award and sales tax.


How can I get more information?
John Chi
WSDOT Project Engineer
Phone: 425-225-8741

Kris Olsen
WSDOT Communications
Phone: 206-440-4704

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