Sammamish River Bridge Seismic Retrofit

The project consists of replacing and reinforcing portions of the bridge.  Construction activities will occur predominately beneath the bridge deck from either suspended work platforms or a barge.  

The project is currently in the design and permitting phase.


Oct. 2019 to Feb. 2020

Bid advertisement published on Jul. 9 and 16 for bid opening Jul. 30.

Sammamish River Seismic Retrofit Vicinity Map

Traffic Impacts

A pedestrian detour is anticipated for the duration of project. The walking trail under bridge north of the river will be closed during construction.