press release:
The contractor working to widen the Spokane Street Viaduct will close First Avenue S at S Spokane Street overnight for up to four consecutive weeks, beginning September 19. The closures will be on weeknights with the possibility of weekend work in October (updates to follow). Work begins at 9 p.m. each night, except on event nights when it will start at 11 p.m. The roadway reopens in each instance at 5 a.m. the next morning.

These closures are needed to strip decks, patch and finish the ramp barrier, erect support structures and prepare First Avenue S for paving in advance of the Alaska Way Viaduct closure happening in late October.

Also, as a reminder, southbound East Marginal Way to the westbound Spokane Street turn lane will be closed tonight and Friday night from 11 p.m. until 5 a.m. the next day.

See www.seattle.gov/spokane for more details on this project.