Seattle Hill Rd

April 2016 Update
Utility work along Seattle Hill Road between 132nd Street SE and 35th Avenue SE is scheduled to begin in May 2016. Throughout the summer, residents should expect to see Puget Sound Energy (PSE), Silver Lake Water District, BP, and Snohomish PUD moving necessary utilities to accommodate widening of the road. Intermittent single lane closures may be required to complete utility work. Please contact appropriate utilities with questions related to their work.


Snohomish County plans to improve Seattle Hill Road between 132nd Street SE and 35th Avenue SE. The project includes widening the roadway to three lanes including a center turn lane. Bike lanes, curbs, and sidewalks are also planned along the road. The corridor is an important commuter route for Snohomish County residents, and has received intermittent improvements in the past as nearby residential developments have been built.



  • 2017 – Construction is slated to begin (two summer construction seasons will be required to complete the work)
  • Spring / Summer 2016 – Puget Sound Energy (PSE), Silver Lake Water District, BP, and Snohomish PUD scheduled to move necessary utilities to accommodate widening of the road
  • 2013 – Environmental review 
  • February 28, 2013 – Public open house at Mill Creek Elementary



This project was awarded $8 million in grant funding for construction, which was estimated to cost $8.8 million. The Puget Sound Regional Council's (PSRC) Surface Transportation Program (STP) granted the project $4 million and it received an additional $4 million from the Transportation Improvement Board (TIB) in late 2014.

Such funding speaks to the significance the project will have on the improvement of vehicular and pedestrian safety and congestion in the area.

Environmental Review

An environmental review of this project was completed in compliance with the State Environmental Policy Act (SEPA). The SEPA documents can be reviewed below. The comment period for this project closed on April 7, 2013. If you have questions please contact Mary Auld at 425-388-3488, ext. 4510, via email, or by mail: Mary Auld, Snohomish County Public Works, 3000 Rockefeller M/S 607, Everett, WA 98201

Available Documents:
The process for developing road projects take several years; many factors must be considered. These factors include:
  • Accident history
  • Critical area regulations (CAR)
  • Design standards
  • Information that residents provide about the area
  • Location of homes and public right-of-way
  • Location of utilities
  • Sight distance
  • Soil compaction
  • Terrain
  • Traffic volumes
  • Wetlands, stormwater runoff, drainage, and water quality

Other Projects in the Area

In addition to the Seattle Hill Road project, the county is working on improvements to other nearby corridors including: