Viaduct Replacement Project Update – Milepost 31 Anniversary and More

Milepost 31 celebrates its one-year anniversary

Join us on Dec. 6 as we celebrate the one-year anniversary of Milepost 31. Since opening last December, Milepost 31 has welcomed over 7,000 visitors from Seattle and around the world. In addition to being a favorite of our guests, the facility has received five awards, including:

  • King County Executive’s John D. Spellman Award for Exemplary Achievement in Historic Preservation.
    • Washington Museum Association for Project Excellence.
    • American Association for State and Local History merit award.
    • History in Progress award.
    • Federal Highway Administration’s Exemplary Human Environment Initiatives award.

Stop by on Dec. 6 for cookies and apple cider throughout the day. That evening, join us for a special guest presentation about the Elliott Bay Seawall Project and learn how the City of Seattle is working to improve this vital piece of infrastructure, while also restoring fish habitat and connections to the water.


Milepost 31 Speaker Series – Elliott Bay Seawall Project: Below the Surface

6 to 6:30 p.m.
Thursday, Dec. 6

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.


Winning TBM name to be announced in December

WSDOT sponsored a contest for kindergarten through 12th grade students to name the SR 99 tunnel boring machine. The deadline to submit names has passed and now comes the hard part: choosing a winner from all of the great suggestions we received. Entries will be judged by a panel including Gov. Chris Gregoire and Washington Transportation Secretary Paula Hammond. The winner will be announced in December, when project officials travel to Japan and Seattle Tunnel Partners takes ownership of the completed TBM.