Sammamish River Bridge Seismic Retrofit

This project will replace and reinforce portions of the bridge over the Sammamish River on 96th Ave NE.  Construction will mainly take place under the bridge deck from either suspended work platforms or a barge.  

The project is currently in construction.


February to April 2020: Construction of the work access platform; taking field measurements; acquiring steel.

April 2020 to July 2020: Construction under the bridge continues.

Sammamish River Seismic Retrofit Vicinity Map

Traffic Impacts

The walking trail under bridge north of the river is closed. Pedestrians are asked to use the crosswalks at SR 522. 

Pedestrian Detour Map

Sammamish River Retrofit Detour Map