Expect lane reductions as viaduct demolition works south to north

Posted on Jun 26 2019 9:24 AM

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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