Updated Wednesday, Dec. 4, 2013 at 12:47 p.m.:
- New: Due to overnight temperatures dipping below freezing, no construction work is planned at this time. The current median work requires warmer temperatures.
- Except during overnight construction work, two lanes in both directions are now open throughout the length of the project - from 212th Street S.E. to 176th Street S.E.
- On Monday, Nov. 11 contractor crews used a modified jet engine to dry the pavement so new asphalt could be spread on the final four-block section between 176th and 180th Streets S.E. Check out video of the Westinghouse J-34 turbine jet in action.
- On Saturday, Nov. 2, crews successfully installed a new signal bridge over SR 9 at 180th Street Southeast. The 164 foot long structure will eventually hold all the new traffic lights and signs for the intersection. Work began at 10:40 p.m. on Saturday when the highway closed. The structure was up and the highway reopened at 3 a.m. Sunday, Nov. 3.
- Our weekly construction schedule provides updates on work for the current and upcoming week.
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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.
• 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 $24.2 million
Aug. 8, 2011 - Begin construction
Thursday, Nov. 21 - Two lanes of traffic between 212th Street S.E. and 176th Street S.E. were open. The lanes opened in three stages with the final section open on Nov. 21.
Spring 2014 - Complete final paving and striping
|Financial Data for PIN 100900F
||Amount ($ in thousands)
|2003 Gas Tax (Nickel Funding)
|2005 Gas Tax (TPA)
|Pre-Existing Funds (PEF)
Project signage will reflect the cost of construction engineering, project bid award and sales tax.
How can I get more information?
WSDOT Project Engineer
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