Latest Program News

  • Work filling the Battery Street Tunnel with viaduct rubble nearing completion

    The first phase of filling the Battery Street Tunnel is wrapping up, scheduled to be completed this week. Since the tunnel closed on February 1, crews have been working inside on its decommissioning and filling. Such work included retiring and removing the tunnel’s utilities and mechanical systems, removing hazardous materials and filling the tunnel to about half its height with crushed concrete rubble.

    A four-wheeled golf cart sits in the entrance to the Battery Street Tunnel which has been half filled with crushed concrete rubble

    Above: A look inside the Battery Street Tunnel, now half-filled with crushed concrete rubble from the viaduct.

    For the first phase of filling, crews used processed concrete rubble from demolished pieces of the viaduct, pouring it in from vents in Battery Street above and compacting it down with vibratory rollers. This cycle of pouring and packing continued until the tunnel was filled to about seven feet from its ceiling.

    What’s next?

    Before moving onto the next phase of filling, crews are spending the rest of this year building utilities in the tunnel. Filling the tunnel provides a unique opportunity to build sewer and electrical infrastructure. Instead of digging into an existing street, crews can layer in vaults, duct banks and sewer lines before filling in the space around them.

    Once utility work is complete, scheduled for early 2020, crews will finish filling the tunnel. Phase two entails pouring low-density cellular concrete into the tunnel from the surface. This flowable concrete will fill in the gaps in the interior top of the tunnel. 

    Graphic showing both phases of filling the battery street tunnel

    The Battery Street Tunnel portion of the project also involves work above ground, including worksite restoration and surface street improvements along Battery Street. Neighbors and travelers in the area can expect some travel or parking lanes to be temporarily closed along Battery Street between Second and Sixth avenues during the upcoming months, with crews typically working one block at a time.

    To stay up-to-date on Battery Street Tunnel construction updates (as well as construction and traffic updates for viaduct demolition and Seventh Avenue North construction), join our weekly email list. You may also contact the project via email, viaduct@wsdot.wa.gov, or by calling the 24/7 construction hotline at 1-888-298-5463.

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  • New video: Behind the scenes of viaduct demolition

    Double-deck demolition begins in Pioneer Square

    With Alaskan Way Viaduct demolition wrapping up along Seattle’s central waterfront, demolition contractor Kiewit is turning its attention south to Pioneer Square. Yesterday, crews established a work zone around Yesler Way, across from the Colman Dock ferry terminal (see a map of street closures). They will soon begin demolishing the viaduct and working their way south. Meanwhile, another crew has already begun working on the viaduct around South Dearborn Street.

    The two crews will work toward each other and meet in the middle. In some places the viaduct sits extremely close to nearby buildings. In those tight locations, demolition teams will saw-cut the structure and lift large pieces with cranes. In most locations, giant munching machines will demolish the structure as they have done farther north along the central waterfront.

    It’s a large and challenging undertaking, one of the toughest jobs these seasoned crews have ever experienced. This new video takes you inside the work zone for a behind-the-scenes look at what it’s really like to tear down the Alaskan Way Viaduct.

    If you are traveling through the area this summer, expect lane reductions and closed roads around the work zone. To give crews space to work and keep the traveling public safely away from the demolition work, Alaskan Way will be narrowed to two lanes and cross-streets closed beneath the viaduct. Drivers should expect increased congestion during heavy driving times around the SR 99 on-ramp and off-ramp at South Dearborn Street. Vehicles will continue to be able to take left and right turns from Alaskan Way into the Colman Dock vehicle holding area at South Jackson Street.

     You can follow progress by subscribing to our Friday construction email updatesbrowsing our interactive tracker, and checking out photos of the work on our Flickr site.

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  • Alaskan Way narrowed, First Avenue restored near SR 99 tunnel’s south portal

    Map showing traffic conditions on and near Alaskan WayCrews are demolishing the southern-most remaining section of the Alaskan Way Viaduct. The ramps that once carried traffic onto and off the structure are gone, and crews are working along Railroad Way South, moving their way north.

    The lane reduction on First Avenue South near South Dearborn Street has been lifted, but Alaskan Way has again been reduced to one lane in each direction between South King Street and South Dearborn Street. Drivers should expect possible increased congestion during heavy driving times around the SR 99 on-ramp and off-ramp at South Dearborn Street.

    Around July 15, a second crew is scheduled to begin preparing to demolish the viaduct starting at Yesler Way and work their way south. You can follow progress by subscribing to our Friday construction email updatesbrowsing our interactive tracker, and checking out photos of the work on our Flickr site.

    Crews will return to remove the section of viaduct above South Dearborn Street later this summer or fall.

    Click on the map at right to enlarge. 

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  • Expect lane reductions as viaduct demolition works south to north

    The viaduct demolition contractor Kiewit is working on the viaduct’s remaining southern section around South Dearborn Street. Crews will be using several methods to remove the structure in this area, including both munching machines and cranes.

    Overhead map showing work areas for viaduct

    After removing the remaining viaduct structure south of South Dearborn Street, Kiewit will begin demolishing the viaduct by working from south to north. However, they will leave the span over South Dearborn Street standing until August.

    On or around July 12, a second crew is scheduled to begin preparing the worksite for removing the viaduct at Yesler Way. Demolition will begin about a week later, and this crew will work their way south. Working simultaneously, these two crews will work their way toward each other, removing this section of viaduct from both ends.

    Lane reductions on First Avenue South and Alaskan Way

    Crews will need safe work space to remove the viaduct, which means lane reductions and sidewalk closures for people walking, biking and driving in the area. The map at right and the list below contain the planned roadway changes over the next several weeks.

    These dates are based on the contractor's schedule and could change:

    • Tomorrow: First Avenue reduces to one lane in each direction near CenturyLink Field, south of South Dearborn Street. This narrowing will not extend past South Royal Brougham Way.
    • July: Streets between Yesler Way and South Dearborn Street will close at Alaskan Way while crews remove the viaduct running overhead.
    • Week of July 8: Railroad Way South closes both directions for four days.
    • Week of July 8: Lane reductions on Alaskan Way return north of South Dearborn Street.
    • Week of July 12: Yesler Way closes beneath the viaduct.
    • August: South Dearborn Street closes while crews remove the viaduct overhead.


    You can follow progress by subscribing to our Friday construction email updates, browsing our interactive tracker, and checking out photos of the work on our Flickr site.

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