Crews will position cranes and install girders for Spokane Street Viaduct widening

The contractor working for the Seattle Department of Transportation (SDOT) to widen the Spokane Street Viaduct will do overnight work on Fourth Ave S every night from September 8-17 except for Sunday night, September 12. The work requires the complete closure of Fourth Ave S between eastbound Spokane and Horton streets and will run from 10:00 p.m. to 5:00 a.m. except for the nights of September 9, 13 and 14, when work begins at 11:00 p.m. to accommodate Mariners and Sounders games. 

During the overnight closures southbound traffic will be detoured west on Horton to First Avenue; northbound traffic will be detoured east on Spokane Street to Sixth Avenue.