North End

North End

Last updated December 1, 2016

Building the north portal

Significant construction continues at the SR 99 tunnel’s future north portal. This is the spot where Bertha, the SR 99 tunneling machine, will emerge at the end of her two-mile journey beneath downtown Seattle. As part of this project, Harrison, Thomas and John streets will be reconnected to provide additional east-to-west connections once the tunnel opens.

Below is a rendering of how the future SR 99 will connect to the surrounding surface streets.

Map showing north portal's reconnected streets

Preparing for Bertha and future traffic

Click through the slider below for photos of work happening around the north portal of the tunnel.