Alaskan Way Viaduct Replacement Update – September 2013

Milepost 31 speaker series – Learn about the buildings that support the tunnel systems


Scale Bertha model at Milepost 31 in Pioneer Square

The new SR 99 tunnel’s vital functions – safety, lighting and ventilation systems – will be controlled from buildings located at both ends of the tunnel. Crews have already begun construction of the building at the south end just to the east of the tunneling machine’s launch pit. Join us for the next speaker series to learn about these sophisticated buildings, how they are sustainably designed, and what the completed structures and their surroundings will look like.

 Thursday, Sept. 5

6 to 7 p.m.

Milepost 31

211 First Ave. S., Seattle

Admission is free.

 After the talk, be sure to leave enough time to explore the rest of the First Thursday Art Walk in Pioneer Square. Milepost 31 is open Tuesdays through Saturdays from 11 a.m. to 5 p.m., and stays open until 8 p.m. on First Thursdays. Free parking is available for First Thursday art walk patrons in Pioneer Square. Please visit for more information about participating garages.

And don’t forget you can track Bertha’s journey to Seattle on Twitter by following @BerthaDigsSR99.