Alaskan Way Viaduct Replacement Program Construction Update – February 2013

SR 99 tunnel boring machine launch pit constructionFrom WSDOT:

If you haven’t seen the SR 99 tunnel’s south-end work zone lately, you should. The progress our crews are making to the west of Seattle’s stadiums is jaw-dropping, and it’s worth taking a look. Crews are building the launch pit and the facilities that will support the tunnel boring machine when it begins its underground journey this summer. Farther south, we are building supports for the new South Atlantic Street overpass. Keep your eyes open in the coming weeks as the bridge deck takes shape over SR 99.

If you want to experience construction in person, the best viewing area is on the bicycle/pedestrian path to the west of the construction zone, between South Jackson and South Atlantic streets. We’ve posted a series of informational signs on the fence along the path to help visitors understand what crews are up to. This map shows you how to get there. Of course you don’t even have to leave your chair to see tunnel crews in action. Our construction cameras give you the latest view of what’s happening in the north- and south-end work zones.
Milepost 31 Speaker Series – Digging Through the Past

Join us for a talk about archaeology, a brief history of the viaduct replacement work site in SODO and Pioneer Square, and the role of archaeologists during construction. This is a chance to see some recovered historical items that provide a view into the area’s past.

6 to 6:30 p.m. Thursday, Feb. 7

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 www.FirstThursdaySeattle.com for more information about participating garages.

For more information about the SR 99 Tunnel Project, visit www.alaskanwayviaduct.org.

Waterfront snapshot: Week ending Friday, January 4

Proposed Waterfront Beach in Pioneer Square

This update is courtesy of WSDOT’s Alaskan Way Viaduct Replacement Program

Construction overview

  • No significant construction work occurred this week on the waterfront.
  • For a weekly update of the latest traffic closures, please visit our webpage.

Continuing and upcoming work

  • Crews continue to install underground monitoring equipment, which is a part of a comprehensive program, helps crews minimize ground movement and protect structures during tunneling. During the upcoming week, work in this program will occur:
    • 7 p.m. Wednesday, Jan. 9 to 5 a.m. Thursday, Jan. 10: North curb parking and sidewalk closed on Columbia Street between Western Avenue and Alaskan Way.
    • 7 p.m. Wednesday, Jan. 9 to 5 a.m. Thursday, Jan. 10: Sidewalk closures on Western Avenue between Marion and Madison streets.
    • 8 p.m. to 10 p.m. Wednesday, Jan. 9: South curb parking closed on Columbia Street between Western Avenue and Alaskan Way.
    • 7 p.m. to 8 p.m. Wednesday, Jan. 9: North lane closed on Marion Street between Post Alley and Alaskan Way.
    • 10 p.m. to 11 p.m. Wednesday, Jan. 9: Southbound left turn lane closed on Western Avenue between Marion and Madison streets.

Alaskan Way Viaduct Replacement Project Update – January 2013

SR 99 tunnel boring machine launch pit constructionSR 99 tunneling machine tweets her name: Bertha

The world’s largest-diameter tunneling machine now has a name, a face and a voice. Meet Bertha, the five-story-tall steel behemoth that will begin boring the SR 99 tunnel  beneath downtown Seattle next summer.

Bertha’s name was chosen as part of a contest for kindergarten through 12th-grade students. Proposed names had to be female and have significance to Washington state heritage, life, nature, transportation or engineering. Bertha was selected from more than 150 entries by a panel of judges that included Gov. Chris Gregoire and Transportation Secretary Paula Hammond. Elected mayor of Seattle in 1926, Bertha Knight Landes was the first woman to lead a major American city.

Leaders from the Washington State Department of Transportation and its contractor, Seattle Tunnel Partners traveled to Osaka, Japan in December to view major components of the newly-assembled machine rotate, extend, retract and move. After testing is completed, she’ll then be disassembled and loaded onto a ship scheduled to arrive in Seattle next spring. Tunneling will start next summer to the west of Seattle’s stadiums, where crews are currently building the massive pit down which the machine will begin its underground journey.

Find out the latest information directly from Bertha via her Twitter handle, @BerthaDigsSR99, as she begins her historic journey from Japan.

Milepost 31 Speaker Series

Milepost 31 will take a one-month hiatus from its First Thursday speaker series in January. Mark your calendars for our Feb. 7 presentation about the role of archaeologists during construction on the SR 99 Tunnel Project.

For more information about the SR 99 Tunnel Project, visit www.alaskanwayviaduct.org.