180th St SE - Phase I

Update - March 2020

Construction on this project has been temporarily suspended (March 27 to April 6) during the COVID-19 pandemic response. We are reassessing the next steps to determine best how to proceed for the safety of our employees, contractors and the public.


Snohomish County’s six-year Transportation Improvement Plan (TIP) identifies projects to improve conditions for pedestrians and motorists along the 180th St. SE corridor. One of these is a project along 180th St. SE beginning at the Bothell-Everett Highway (SR 527) intersection.

The county is proposing to add two lanes to bring 180th St. SE up to five-lanes between SR 527 and 23rd Ave SE (Phase I), along with bike lanes and sidewalks on both sides of the road.

The project was recently awarded $4 million from the Washington State Transportation Improvement Board for construction funding. 


Construction is scheduled to begin in spring 2020. The project will be completed by fall 2021. 

Environmental Review

An environmental review and Checklist was completed in compliance with the State Environmental Policy Act (SEPA) on March 2, 2018 for Phase I of the proposed 180th St. SE road improvement project.

Snohomish County Public Works determined that this project does not have a probable, significant adverse impact on the environment and has issued a Determination of Non-significance (DNS).

Public Comment & Appeal Period

The SEPA comment period regarding this project ended on March 26, 2018.

Senior Planner Mary Auld, 425-262-2460, is the contact for the environmental process.

Public Meetings

Snohomish County Public Works held a public meeting on June 27, 2017 to discuss four projects in this area. The projects were the 35th Ave SE - Phase II, 43rd Ave SE/Sunset Rd, 180th St SE Phase I and II, and 196th St SE/Grannis Rd. Staff was available to answer questions, review proposed improvements, and gather feedback on potential designs. The project was also featured during the fall 2019 meeting featuring the 43rd Ave SE/Sunset Rd Improvement Project.


Other Projects in the Area