The Seattle Department of Transportation has produced a video explaining their effort regarding final repair work on the West Seattle Bridge. See the video below.

Director of the West Seattle Bridge Repair project Heather Marx explains in the video how that work is done.

In a press release they further explained:

As you saw earlier this week, concrete trucks have arrived on the West Seattle Bridge this week. The first concrete was poured for new expansion joints. Following the joint pours, we’ll later pour concrete inside the bridge for the improved post-tensioning system that will provide additional strength for the repaired bridge. In total, bridge repairs require about 30 truckloads of specialized concrete. 

While we’re encouraged that we’ve begun the concrete work delayed by the strike, we now need to see how the deliveries will go and manage the pours for the next month or so. After the pours are done and the work is inspected, we’ll be able to revisit the project schedule and share an update about the timing of the reopening, originally scheduled for mid-2022. 

We also continued progress on other repair work, including epoxy crack-injection and carbon-fiber wrapping on the bridge’s exterior. We completed more core-drilling and form work this week to prepare for new post-tensioning.