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Travel advisory | Overnight lane reductions on Alaskan Way Between Columbia and Madison streets begin tonight, Tuesday, February 21

Marion Street Pedestrian Bridge temporary falsework that will be removed in the coming weeks.

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Construction of the new Marion Street Pedestrian Bridge has progressed to a point where construction workers can remove the temporary “falsework” support structure on Alaskan Way. 

Starting overnight tonight, Tuesday, February 21, workers will begin removal of the falsework and columns that have supported construction on the bridge over Alaskan Way.

To safely perform this work, Alaskan Way will be reduced to one lane in each direction between Columbia and Madison streets overnight daily, Monday through Friday, from 7 PM to 6 AM, starting Tuesday, February 21 and continuing through Friday, March 10. An officer will be on-site to help direct traffic during overnight work.

Installation of the falsework began in fall 2022 following construction of the bridge’s V-shaped columns.

Progress on falsework construction, looking east over Alaskan Way at Marion St in fall 2022.

Completing the falsework installation helped set the stage for the work platform to be installed. Construction workers then moved on to building form work and installing reinforcement and electrical conduit for future lighting. With all the necessary forms and rebar in place, workers poured concrete for the deck in early-February.

Construction workers stand on green steel rebar, at a construction site. Large buildings are in the background. A yellow cable runs along the green rebar.
A view of reinforcing steel, also known as rebar, on the bridge prior to the concrete pour.

Below is a short timelapse video of the concrete pour for the bridge, as well as the placement of blankets to support the 14-day “wet cure” needed to set the concrete.

Check out this video of the concrete pour for the bridge in February 2023. Video credit: Waterfront Seattle.
Three construction workers wearing safety vests and hardhats stand atop a concrete bridge next to a large entry building, on a sunny day.
Photo of the bridge concrete in place following removal of wet-cure blankets on February 15.

The upcoming removal of the falsework is a visible demonstration of progress on the new pedestrian bridge connection on Marion St between 1st Ave and the new Colman Dock entry building west of Alaskan Way. Following the completion of this section of the bridge over Alaskan Way, we will shift to constructing the segment of the bridge between Alaskan Way and Western Ave. The new Marion Street Pedestrian Bridge is anticipated to open later this year.

To learn more:

The Waterfront Seattle Program is a One Seattle collaboration between the Office of the Waterfront and Civic Projects and other City of Seattle departments including the Mayor’s Office, the Seattle Department of Transportation, Office of Planning and Community Development, and Seattle Parks and Recreation.