180th St SE - Phase II

September 2023 Update

Snohomish County Public Works continues to evaluate the environmental impacts of the 180th St SE – Phase II widening project. Nearby wetlands require an additional critical area report and Joint Aquatic Resources Permit Application (JARPA). Both are underway. Phase II remains at the 60 percent design phase. The county is currently seeking funding sources, so a construction date has not been scheduled. 


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 23rd Ave SE and 35th Ave SE, along with bike lanes and sidewalks on both sides of the road, as a part of Phase II of this road improvement.


Phase II is at the 60 percent design phase. Construction has not yet been scheduled.

Public Meeting

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.

Environmental Review

An environmental review and Checklist was completed in compliance with the State Environmental Policy Act (SEPA) on April 7, 2019 for Phase II 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).

To address minor changes to the original Environmental Checklist prepared, an Addendum was completed in compliance with SEPA on Jan. 3, 2024. This Addendum does not affect the DNS that was issued for the project. 


Other Projects in the Area