July 22 project update: Yellow stacks installed at the north portal

Posted on Jul 22 2015 8:11 AM
Earlier this month, the work zone to the west of Seattle’s stadiums got a bit brighter when Seattle Tunnel Partners installed four yellow ventilation stacks at the south operations building. This week it’s the north portal’s turn, as STP installs the north operations building’s ventilation stacks.
The four yellow stacks were lifted into place Wednesday at the north portal site, which is located just east of the Gates Foundation. Manufactured in Longview, Wash. with American-made steel, the stacks will be part of the tunnel’s ventilation system. This post from April explains a bit more about the function of the two operations buildings.
The color of the stacks was inspired by WSDOT’s yellow maintenance vehicles, some of which will be stored within the operations buildings. Like all aspects of the design, the color was developed with guidance from the Seattle Design Commission. 
Image of north portal ventilation stacks
Four tunnel ventilation stacks were installed Wednesday at the the tunnel's north portal, near the Space Needle.