Contents tagged with home

  • Hot Chocolate Run to close a portion of SR 99 on Sunday morning

    City of Seattle crews will close SR 99 in both directions from 6 a.m. to 11 a.m. Sunday, March 1 between the south end of the Battery Street Tunnel and North 47th Street as part of the Hot Chocolate Run

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  • Feb. 26 project update: Bertha’s next move

    After taking a break from mining to clean up the mixture of dirt, concrete and water that came into the access pit during last week’s breakthrough, Seattle Tunnel Partners has resumed Bertha’s final approach into the pit. 
    Because the cutterhead has made it through the pit wall, there isn’t any digging left to do. The focus now is on building the concrete tunnel rings that enable the machine to move forward. Bertha must build five more rings – a process that’s explained visually in this animation (links to YouTube) – before she comes to rest near the northern edge of the pit. Bertha will continue to take breaks so crews can clean up debris.
    When the machine reaches its destination, crews will begin disassembling the machine and preparing to lift pieces to the surface for repair. STP has said this process will take significant time and effort because it involves a number of steps. These steps include:
    • Installing work areas around the machine
    • Disconnecting joints, cables and hoses
    • Removing cutting tools and other parts from the cutterhead
    • Welding lift points on the body of the machine

    When the disassembly process is complete, a massive red crane (links to YouTube) will move into position. Several pieces of the machine will be removed from the pit before the cutterhead, as illustrated in STP’s repair video (links to YouTube). 

    We’ll continue to keep you posted as STP’s work moves forward. Remember to visit our access pit camera and follow Bertha on Twitter for the latest information.

    Crews clean up debris in the access pit.
    Repair plan resources:


    Previous updates

    Feb. 20, 2015 afternoon update - Tidying up the launch pit

    Feb. 19, 2015 morning update - Bertha reaches daylight

    Feb. 19, 2015 morning update - Bertha approaching the pit

    Feb. 18, 2015 afternoon update - Bertha digs on

    Feb. 18, 2015 project update - Bertha on the move

    Archive of previous updates


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  • Feb. 20 update: Tidying up the access pit

    After a few days of steady digging, Seattle Tunnel Partners is taking a break from mining so crews can clean out the bottom of the access pit. As expected, a mixture of dirt, concrete and water came into the pit along with the tunneling machine during Thursday’s breakthrough. Crews are using vacuum trucks and other tools to remove the material. 
    Once Bertha’s cradle is cleaned off, crews will continue moving the machine forward. Bertha must travel an additional 35 feet before STP and manufacturer Hitachi Zosen can begin the disassembly process. Since mining resumed late Tuesday, Bertha has moved nearly 22 feet.

    Repair plan resources:


    Previous updates

    Feb. 19, 2015 morning update - Bertha approaching the pit

    Feb. 18, 2015 afternoon update - Bertha digs on

    Feb. 18, 2015 project update - Bertha on the move

    Feb. 13, 2015 project update - Safety at the forefront

    Feb. 13, 2015 project update - Long-term traffic impacts on SR 99: lane closure begins March 7 through late May

    Feb. 12, 2015 - Incident at tunnel's north portal work zone

    Feb. 9, 2015 project update - Cradle awaits Bertha's front end

    Archive of previous updates


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  • Long-term traffic impacts on SR 99: Lane closures begin March 9 through late May from Valley Street to the Aurora Bridge

    Beginning March 9, crews building the future north portal of the SR 99 tunnel will close a single lane in both directions of SR 99/Aurora Avenue North between Valley Street and the Aurora Bridge. Two lanes will be open in each direction while crews install foundations for four large sign structures in the median and curb areas.

    Closure details and schedule

    Work is planned in two phases. View a map of the work locations. 

    • Phase 1 (approximately 8 weeks): one lane closed in both directions for median work
      • One lane in the northbound and southbound directions will be closed around-the-clock while crews install four sign foundations in the median
    • Phase 2 (approximately 4 weeks): one lane closed in southbound direction for curb work
      • One southbound lane will be closed around-the-clock while crews install two sign foundations in the southbound curb area

    WSDOT understands that these closures will be inconvenient for those who use SR 99 on a regular basis. As such, this work is being completed in winter and early spring to take advantage of typically lower traffic volumes and to avoid conflicts with the recent football season and upcoming major summer events.

    Construction schedules are inherently unpredictable due to weather and other factors. Durations shown for each phase are approximate and may change. We will keep the public informed as we prepare for Phase 2 work.

    Bus rider information

    Because northbound and southbound buses will travel – and stop – in the outside lanes with other vehicle traffic, trips may take longer than normal. During both phases the southbound bus-only lane restriction will be lifted.

    Nighttime and weekend work

    In an effort to balance the needs of drivers and residents, some work will occur during nighttime and weekend hours. An additional lane may close at night and during some weekend days.

    Driver tips

    The long-term lane closures are expected to cause additional backups on SR 99 for vehicles and buses, particularly during peak commute times. WSDOT is encouraging drivers and bus riders to: 


    Contact us at or 1-888-AWV-LINE (298-5463) or visit us at

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  • Take a virtual tour of SR 99 tunnel construction

    Keeping the public informed about our work to replace the Alaskan Way Viaduct is an important part of what we do every day. Our goal is to give you as much access as possible to this amazing project, which is why we regularly post updates, photos and videos of our progress. We even offer walking tours from our information center, Milepost 31, to a viewing platform that overlooks the pit where tunneling began in summer 2013.

    Unfortunately, there’s one frequently received request … more

  • New narrated video explains Bertha repair work

    As reported elsewhere on our website, work to access and repair the SR 99 tunneling machine is coming along. We’ve heard from some people that Seattle Tunnel Partners’ repair plan is hard to picture. Enter STP’s Chris Dixon, who was nice enough to narrate a video that explains what crews are doing to resume tunneling by March 2015. Watch it on YouTube or download a WMV file.

    Other resources 

    Seattle Tunnel Partners repair work plan (pdf 4.8 Mb) … more

  • What we’re doing to keep traffic moving during the four-day SR 99 closure

    We’ve been asking you to do your part to reduce congestion when SR 99 closes for four days starting Friday night, Aug. 22. That includes things like changing your commute habits and choosing an alternate way to get around.

    But what are we, the agencies tasked with keeping traffic moving during this closure, doing to help? Quite a bit, actually. Here’s a roundup of some of the steps we’re taking to help you and your fellow commuters through the closure.

    Washington … more

  • Traffic shift underway on State Route 99 near the stadiums

    Less than three years ago, crews demolished the southern mile of the Alaskan Way Viaduct. When they did, they shifted traffic onto a new section of State Route 99 south of downtown Seattle.

    Much of that new section of SR 99 is permanent, but the piece west of the stadiums is temporary. This curving stretch of road takes drivers around the SR 99 tunnel construction site and connects to the remaining section of the viaduct near South King Street. It’s nothing fancy, but it’s … more

  • Celebrate Bike Month on our new path

    Just in time for Bike Month, we opened a new permanent connection between the on-street bike lanes south of South Atlantic Street and the shared-use path from South King Street. Here’s a map that shows the improvements, which include:

    A dedicated, 14-foot-wide shared-use path with improved paving.

    Improved lighting.

    A separate northbound and southbound path for more efficient navigation.

    Signs warning of vehicles crossing the intersection of … more

  • The SR 99 tunnel contract you’ve never heard of

    You may have noticed more construction along State Route 99, just north of the Battery Street Tunnel. That work is part of the SR 99 Tunnel Project, but it has its own name – the North Access Project. It’s also being built under a completely different contract than the one we have with Seattle Tunnel Partners, the contracting team responsible for most of the tunnel work. A map of major contracts within the program can be found here (pdf 1.1 Mb).

    Our contractor for the North … more