Skip to main content

SR 9/SR 204 Intersection Improvements – Improvements

Why is WSDOT improving the SR 9/SR 204 intersection?

The SR 9/SR 204 intersection experiences congestion that affects Snohomish County commuters and freight mobility. Backups and delays limit access to the many businesses in the economic center that surrounds this busy intersection. By 2040, traffic volumes are likely to grow by over 20 percent increasing congestion beyond the state’s acceptable limits.

The project team conducted Stakeholder Advisory Group meetings, public open houses, business forums, and other community outreach activities to develop improvements that incorporate community priorities and meet the project needs. The chosen intersection design includes four roundabouts and allows for direct access in and out of Frontier Village, continuous traffic flow throughout the intersection, and traffic calming features which help reduce speeds and collision severity.

These improvements will:

  • Manage congestion and improve mobility
  • Provide access to nearby businesses
  • Create more travel options with improved connections for pedestrians, bicyclists, transit riders, and drivers
Illustrated birds-eye-view map of the improvements planned at the SR9 SR204 intersection with callout boxes detailing specific project elements.
This map shows the improvements planned at the SR 9/SR 204 intersection in Lake Stevens. It includes four roundabouts, various operational improvements, and highway widening.

Project history

In 2016, WSDOT formed a project Stakeholder Advisory Group to advise on developing and evaluating options to improve the intersection. The group consisted of elected leaders and representatives from the City of Lake Stevens, Snohomish County, area businesses, and transit providers. The group members reviewed multiple design options which were presented to the public at open houses in 2017. After hearing the public feedback, the group agreed on a preliminary design which called for rebuilding SR 9 to travel underneath SR 204. However, during design development, the project team looked at underground subsurface conditions and discovered the groundwater level is just nine feet below the surface. This meant the cost, materials and overall feasibility of the preliminary design needed further review. 

Re-evaluating the design in 2018 allowed for further innovation and cost savings while staying true to the project’s purpose and need. The team reviewed a widening option and a roundabout option. The revised roundabout option provided better overall benefits than the original alternative.  This project is funded by the 2015 Connecting Washington transportation funding package which allocates $69.5 million for this project, including environmental study, engineering, right-of-way acquisition, and construction.