• Project

Battery Street Tunnel and North Surface Streets - Complete July 2021

Project overview

After SR 99 in Seattle was aligned to run through the SR 99 tunnel, the Battery Street Tunnel was decommissioned and filled and the tunnel's northern approach built into a new arterial street (Seventh Avenue North) featuring bus lanes and reconnected intersections.

February 2019 - July 2021
Project status
$366.2 Million

What to expect

Final construction for this project ended in fall 2021. The south portal of the old Battery Street Tunnel was handed over to the City of Seattle, which is responsible for decisions about the future use of that land.

The northern approach to the Battery Street Tunnel was a trench that prevented east-west connections on John, Thomas and Harrison Streets. Filling the Battery Street Tunnel allowed these streets to be reconnected.