West Sammamish River Bridge Replacement

The West Sammamish River Bridge Replacement Project is now substantially complete.

There are channelization changes coming to the 68th Ave corridor between 175th St and 181st St. The pavement markings south of 175th St were completed with the bridge project, but the changes north of 175th St were delayed, resulting in the mismatch with the double-right arrow in the northbound curb lane. Although this mismatch has raised some eyebrows, it does not present a safety hazard to drivers. When the re channelization on work on 68th Ave is completed in the late spring/early summer, all the signs and marking will agree and the issue will resolve itself.

Thank you for your patience during construction!

 

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Bridge Construction Highlight Videos

Enjoy these videos highlighting the construction of the West Sammamish River Bridge from April 2020 to August 2022:

Construction Overview Video (short version):
Construction Overview Video (extended version)
Drone footage from the Grand Opening Celebration of the bridge (August 11, 2022)

 

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Project Background
Construction: April 2020 - Fall 2022

The West Sammamish River Bridge carries southbound traffic over the Sammamish River on 68th Ave NE. The original concrete west bridge was constructed in the 1930s and reached the end of its engineered life. To ensure the long-term safety of the community, the City of Kenmore replaced the former structure with a new west bridge.

Project Overview

The project replaced the existing west bridge (southbound travel lanes) across the Sammamish River and included the construction of new sidewalk and bike facilities on the west side of the road between NE 170th St and NE 175th St. The project also replaced the signals on 68th at 170th and 175th, replaced existing and added new streetlights, moved utilities to underground conduit, and added new landscaping. In addition, the project made improvements to the approaches to the bridge between NE 170th St and NE 175th St. 

Original Funding Projections

Table Depicts Funding Sources and Estimated Dollar Amounts
FUNDING SOURCES DOLLAR AMOUNTS
Federal Highway Administration (FHWA) Highway Bridge Programs   $12,000,000.00
Surface Transportation Program (STP) Federal Funds   $  1,063,000.00
Connecting Washington State (State Funds)   $18,000,000.00
Transportation Improvement Board (TIB) State Transportation Funds   $  7,000,000.00
Local Kenmore Funds, Northshore Utility District/Other Utilities in Project Area  $   5,237,000.00
TOTAL ALL SOURCES AND PROJECTED COSTS
  $43,300,000.00

 

West Sammamish River Bridge Rendering 3-11-19