SR 520 Trail Grade Separation

Project Overview

Construct a tunnel underneath NE 40th Street to provide a grade separated route for the 520 Bike Trail. This includes pedestrian, bicycle, and/or maintenance connections to adjacent and nearby sidewalks and/or bus stops. 

Project number:  SEPA-2019-00967

Project Type:  State Environmental Policy Act

For more information on this project:  SEPA Project Details (PDF)

Related Environmental Documents
Hazardous Material Report (PDF)
Storm Drainage Report (PDF)