SR 9 - SR 204 Intersection Improvements

Project news

  • Marshbank Construction, Inc. completed the first phase of this project in fall 2019.
  • Phase two is scheduled to begin construction in 2020.
  • WSDOT held the 11th Stakeholder Advisory Group (SAG) meeting on June 19, 2019, with the members giving consent on the new intersection design. 
  • Missed our open house on March 20, 2019? View the open house display boards on Flickr.
  • Be in the know! Sign up for email updates for this project and other Snohomish County projects.

In 2015, the Legislature provided funding for WSDOT to improve mobility and access at the State Route 9/204 intersection in Lake Stevens. Congestion at this intersection affects Snohomish County commuters as well as regional and freight traffic.  

Early planning and design work resulted in a preferred alternative design for the SR 9/SR 204 intersection. During this phase, the project team conducted Stakeholder Advisory Group meetings, open houses, business forums, and community outreach to ensure the final design incorporated community priorities and met the project needs.

The project team is advancing design and construction of the preferred alternative design, featuring roundabouts, added lanes, and improved access points to improve traffic flow. Next steps include collecting data and identifying environmental impacts, soil conditions, groundwater levels and noise impacts. Based on this information, the project team will refine the design and add more detail, such as pedestrian and bicycle facilities. Project construction is planned in stages with an estimated completion date of 2023.

Needs & benefits

The improvements planned for the SR 9/SR 204 intersection in Lake Stevens use roundabouts to diffuse traffic through the economic center of Lake Stevens.

  • Improved mobility: Improves traffic flow, trip reliability, freight movement and safety.
  • Improved access to local businesses.
  • More choices for travel options by improving transportation connections for pedestrians, bicyclists, transit riders and drivers.


  • 2015: Project funded through Connecting Washington funding package
  • 2016 to 2019: Public outreach and design options development
  • Mid-2019: Select preferred design alternative
  • 2018 to 2021: Project design
  • Mid-2019: Stage 1 construction of new southbound lane near Market Place began
  • Mid-2020: Stage 2 construction of new northbound lane begins
  • Mid-2021: Stage 3 construction of roundabouts begins
  • 2023: Construction complete


Financial Data for PIN 100910K
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $0
CWA $69,430
Total $69,430


Frances Fedoriska