(SDOT camera image from Sunday, via X)

4:37 PM: Among the weekend incidents we’ve been following up on today is the hours-long westbound lane closure that backed up traffic on the Spokane Street Viaduct (the official name of the east half of the West Seattle Bridge) on Sunday. It wasn’t announced in advance, and was only explained as “construction work.” So today we asked SDOT for more information, and whether any other work would follow. Here’s what we just received via email:

Crews were doing emergency repairs on the Spokane Street Viaduct to inspect and fix crash-cushion barriers damaged in an incident. It wasn’t possible to provide advance notice — but we understand the disruption this caused and appreciate the public’s patience.

There will be follow-up work needed to complete the repairs. That work will be scheduled in advance, and we will share the details publicly once we have confirmed dates.

We’ve asked for more information on the “incident” in question, as we’re not seeing anything logged in the hours before the emergency work.

5:37 PM: An SDOT spokesperson replied to that followup: “The damage was caused by a previous crash. Crews made the repairs Sunday because that was when the vendor was available, and they needed to be on site as well.” That reopens the question of why no advance alert.