SR 410 / 234th Avenue to Garrett Street Corridor Study

In December 2018, the SR 410 234th Avenue E to Garrett Street Congestion Study was completed and the report is now available for viewing. With the help of local stakeholders, and the community, the Washington State Department of Transportation developed a list of recommended improvement strategies.

Study Report

Executive Summary (pdf 210 kb)

Study Report (pdf 2.5 mb)

Study Purpose

WSDOT will examine traffic congestion along a busy section of State Route 410 between Bonney Lake and Enumclaw, developing potential strategies to reduce congestion and improve safety benefits including replacing or expanding the SR 410 White River Bridge. The study will evaluate how to improve current and future travel conditions using strategies identified through the Practical Solutions planning approach. 

Public Outreach

Public meetings were held in Buckley and Enumclaw to share information about the study. 

End result

This study will summarize existing and future conditions along the SR 410 corridor between Bonney Lake and Enumclaw based on data and stakeholder input received through survey results and open house feedback. Additionally, the intent of this study is to propose near-, mid-, and long-term strategies to improve travel and corridor conditions for travelers. Recommendations will guide WSDOT moving forward in identifying future solutions.


Funding for this study was provided by the Washington State Motor Vehicle Account. A total of $300,000 was allocated during the 2017-2019 biennium.


Spring 2018

  • Stakeholder and community engagement
  • Data collection and analysis

Summer 2018

  • Continued stakeholder and community engagement
  • Refine and finalize improvement strategies

Fall 2018

  • Community engagement 
  • Complete study report


Dennis Engel, Multimodal Planning Manager