NW Sammamish Road Non-Motorized Improvements

Project Area Map

Overview

The City is adding bicycle and pedestrian improvements on NW Sammamish Road between 193rd Place SE and the Lake Sammamish State Park entrance. The project will increase mobility between the South Lake Sammamish neighborhoods and the Central Issaquah downtown area.

Benefits of the project include:

  • Increased safety for bikes and pedestrians
  • Better connections to regional trails/amenities in Downtown Issaquah
  • Making transportation more equitable for those who do not have access to a personal vehicle
  • New roadway surfacing for motorized vehicles
  • Fills in the non-motorized infrastructure gap surrounding Lake Sammamish

Background

NW Sammamish Road is an essential corridor for the City that provides access between two major interchanges for lakeside communities north of Interstate 90. This missing link around Lake Sammamish needs non-motorized improvements to provide safe and equitable access in North Issaquah.

Coordination with  Washington State Department of Transportation (WSDOT)

The Washington State Department of Transportation (WSDOT) has several projects in this area, including a multi-year fish culvert project that will build a new bridge for Schneider Creek and impact the roadway. The NW Sammamish Road Non-Motorized Improvements will be planned in coordination with WSDOT. In the graphic below, the WSDOT project is indicated with red, while the City project is in orange.

WSDOT Coordinatoin

Recent Updates

Following the Community Open House and input from the Transportation Advisory Board and City Council Mobility and Infrastructure Committee, the preferred cross-section was approved at the April 17, 2023 City Council Meeting. 

The project will now move into the design and environmental permitting phase. Coordination will continue with WSDOT to determine the City project’s construction timeline.

From June 21-29 2023, the City is collecting soil data to inform design of the new roadway pavement and potential retaining walls. During collection periods, there will be traffic control along the roadway to maintain bi-directional access on the roadway, but short delays should be expected on this route during work hours. We thank you for your patience with the traffic control during this important step in the project process.

Preferred Cross-Section

The preferred cross-section includes 10’-14’ wide multi-use pathway for bicyclists and pedestrians on the north side of NW Sammamish Rd separated from the roadway by a planter strip and reduced 10-foot wide vehicle travel lanes to promote traffic calming.

NW Sammamish Cross-Section

Timeline

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