This report sent by SDOT:

The contractor working for the Seattle Department of Transportation (SDOT) to widen the Spokane Street Viaduct will be working at the intersection of East Marginal Way and South Spokane Street for up to four days—from 7 p.m. on September 16, to 5 a.m. on September 20. Crews will maintain one lane both northbound and southbound through this intersection. No turning movements will be restricted.

As a reminder, the contractor continues overnight work along Fourth Avenue South, between eastbound Spokane and Horton streets. The crews are drilling shafts for a new off-ramp from the Spokane Street Viaduct to Harbor Island. The work requires the complete closure of Fourth Avenue South from 10 p.m. to 5 a.m. each night, wrapping up the morning of September 18. During the closures, southbound traffic will be detoured west on Horton to First Avenue; northbound traffic will be detoured east on Spokane Street to Sixth Avenue.