Latest Program News

  • Marion Street Pedestrian Bridge will close March 30–31 for overhead viaduct demolition

    Ferry passengers and other users of the Marion Street Pedestrian Bridge should prepare for detours this weekend as the viaduct demolition contractor Kiewit will close the bridge Saturday and Sunday, March 30-31. This is a safety precaution while Kiewit removes parts of the viaduct decks above and around the bridge. Marion Street beneath the viaduct will also be closed for about a week.

    Closure sequence:

    • Tuesday morning, 3/26: Marion Street closes between Alaskan Way and Western Avenue
    • Saturday morning, 3/30: Pedestrian bridge closes beneath the viaduct
    • Sunday night, 3/31: Pedestrian bridge reopens
    • Tuesday, 4/2: Marion Street reopens

    Kiewit will remove parts of the viaduct deck above and around the pedestrian bridge (“slotting” the deck), while leaving the girders and columns in place. WSDOT and Kiewit know that closing the bridge is disruptive to Colman Dock travelers and so have been refining their plans to make this as short of a closure as possible. Removing this portion of the viaduct now will speed up Kiewit’s overall work schedule and reduce construction disruption this summer. After this short closure, the bridge will stay open until the new, temporary bridge being built on Columbia Street is ready to open this summer.

    Free, ADA-accessible shuttle while bridge is closed

    Kiewit will run a shuttle van while the bridge is closed. The shuttle is free and for all users, although priority will be given to people with limited mobility or who require extra accommodation. The shuttle will stop near each end of the Marion Street Pedestrian Bridge.

    Shuttle details:

    • Operating hours: 6 a.m. – 2 a.m. (during Colman Dock operating hours)
    • Frequency: Every 20–30 minutes
    • Colman Dock stop location: West side of Alaskan Way north of Marion Street
    • First Avenue stop location: East side of First Avenue between Marion and Columbia streets

    The shuttle van will drive a loop between Colman Dock and the intersection of First Ave and Marion Street. The route is below:

    Map showing shuttle route through downtown Seattle

    Other pedestrian detour options while the pedestrian bridge is closed:

    • Madison Street and Columbia Streets will both be open to pedestrians between Alaskan Way and First Avenue.
    • The pedestrian bridge stairs at Western Avenue and the elevator at Post Avenue will both be open.

    Sign up for our weekly construction email for the latest on viaduct road closures and work progress. You can learn more about construction at Colman Dock on that project’s website.

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    Order: 3.6

  • Lenora Street Pedestrian Bridge closing March 19-26 for viaduct demolition

    The viaduct demolition contractor Kiewit is working their way north to south at the north end of the Alaskan Way Viaduct. This week their path takes them to Lenora Street. They will be removing a section of viaduct above the Lenora Street Pedestrian Bridge, and as a safety precaution the bridge will be closed for about six days.

    Aerial view of Lenora St ped bridge running under viaduct

    Caption: The Lenora Street pedestrian bridge provides a route between Western Avenue and Alaskan Way. 

    During the closure, a free shuttle will provide rides between the top and bottom of the bridge.

    Shuttle details

    • Hours of operation: 6 a.m. – 8 p.m.
    • Arrival frequency: approximately every 20-30 minutes 
    • Shuttle is ADA-accessible; holds 22 passengers
    • Western Avenue stop location: Western Avenue just north of Lenora (east side of street)
    • Waterfront stop location: Alaskan Way just north of Lenora Street (east side of street)

    Other pedestrian detour options during the pedestrian bridge closure are the Bell Street Pedestrian Bridge two blocks to the north, and the Pike Street Hill Climb to the south. The Pike Place Market parking garage between Pine and Pike streets on Western Avenue also has an elevator.

    Map of Belltown showing shuttle route between Alaskan Way and Western Avenue

    Caption: Shuttle route while the Lenora Street Pedestrian Bridge is closed. Click for larger version.

    You can follow Kiewit’s progress on removing the viaduct on our interactive map, and by subscribing to our weekly construction email list.

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    Order: 3.7

  • A bite out of the middle: Kiewit begins demolition of double-deck viaduct

    Demolition of the Alaskan Way Viaduct hits a dramatic milestone this week as the contractor begins removing the first section of the double-deck structure. Until now, the large green and white machines have been munching and hammering on the viaduct’s edges and tucked-away sections. This week, they start chewing on the viaduct’s meaty middle.

    The contractor Kiewit and their subcontractor Ferma have a multi-step schedule for taking down the viaduct that involves crews working at several locations at once. They began in mid-February at three locations: the Columbia Street on-ramp; the western half of the viaduct near Pike Street; and the very north end of the viaduct around the intersection of Western Avenue and Bell Street.

    So far Kiewit has removed 450 feet of the Columbia ramp, about 360 feet of the viaduct near Pike street, and about 650 feet of bridge at the viaduct’s north end. In all, roughly 22 million pounds of concrete and steel has been hammered and munched off the structure. Kiewit trucks the rubble down to Terminal 25, where the rebar is removed and the concrete broken into small pieces for eventual use as fill in the Battery Street Tunnel. A small amount of the concrete is being used as rubble pads in work areas. The time-lapse video below captured the work at Columbia Street:

    Over the weekend, the large muncher machine used at Pike Street was slowly moved down to Columbia Street. Crews will use that machine this week to begin demolishing the viaduct between Columbia Street and Yesler Way. First removing the top deck and then the lower deck, crews will work their way north along the waterfront. Ahead of demolition, Kiewit will fence off the work zone and prepare the area. Behind demolition, crews will clean up and restore the ground to its previous condition.

    Diagram of viaduct showing three stages of work as demolition moves south to north along viaduct

    Caption: Each work zone has three areas: prep, demolish, and restore.

    Along the waterfront, the work zones will narrow Alaskan Way to one lane in each direction. Drivers should expect congestion in those areas, especially during peak commute times. People walking and biking in the area should expect detours around the work zone when trying to go east-west beneath the viaduct. Signs will indicate the closest open side street in either direction. The shared-use sidewalk on the west side of Alaskan Way will remain open, but the path on the east side of the street will be closed when it is part of the work zone.

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    Order: 3.8

  • South Atlantic Street beneath SR 99 reopening soon

    This week crews are pouring concrete on South Atlantic Street in SODO, near its intersection with Colorado Avenue South. The street has not run east-west beneath SR 99 for years, interrupted by highway barrier and the temporary South Atlantic Street off-ramp WSDOT built as part of the SR 99 tunnel project.

    Construction across a wide street with highway overpass in background

    Above: The start of work on South Atlantic Street beneath the SR 99 overpass.

    With the tunnel open and that SR 99 off-ramp gone, crews are able to restore this street (pouring concrete so the road lasts longer under the weight of trucks coming to and from the Port of Seattle). South Atlantic Street will provide a path between Alaskan Way South and First Avenue South, and a new option for drivers going between SR 99 and East Marginal Way. The street does have a railroad crossing, which is why the overpass we opened above SR 99 in January 2014 provides important congestion relief for trucks coming to and from the Port of Seattle's Terminal 46.

    Drivers in the area should expect some road closures this week as crews pour concrete. This work schedule could also change in the event of heavy rain or low temperatures.

    Phase 1: Monday, March 4 – Thursday, March 7

    • Crews have begun pouring concrete on South Atlantic Street near its intersection with Colorado Avenue South.
    • The right-hand lane of the southbound direction of the Atlantic Street overpass ramp is closed.
    • By 7:00 am Thursday morning, crews will open a freight-only lane of eastbound South Atlantic Street beneath the overpass.

    Phase 2: Thursday, March 7 – Sunday, March 10

    • As soon as the eastbound lane is open, crews will fully close the South Atlantic Street overpass ramp.
    • During the day Thursday, crews will grind down pavement, prep the subgrade surface, and pour new concrete in the intersection.
    • Sidewalks and building access will be unaffected, but drivers entering or exiting driveways and garages on Colorado Avenue South should use South Massachusetts Street.
    • Sunday evening, the South Atlantic Street overpass ramp will reopen and the freight-only lane will close.

    Next week, crews will pour concrete for new sidewalk on the north side of South Atlantic Street. Then, on Saturday, March 16, our contractor will work with the Seattle Department of Transportation to install traffic signals and paint the roadway so by Saturday evening, South Atlantic Street can open in both directions beneath SR 99.

    This piece of work is one of the final components of the SR 99 Connections Project, one of 30 projects that together make up the Alaskan Way Viaduct Replacement Program.

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    Order: 3.9