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SDOT announces the next full weekend closure of SR 99 and Mercer St. the weekend of July 5-8 for construction activities associated with the West Phase of the Mercer Corridor Project.

Weekend work on SR 99 and Mercer St.: Friday, July 5 through Monday, July 8

On Friday, July 5, Mercer Corridor Project crews will begin work on SR 99 and Mercer St. including demolition of the east side of the SR 99 bridge over Mercer St. SR 99 and Mercer St. will be fully closed to traffic beginning Friday, July 5 at 11:00 p.m. to Monday, July 8 at 5:00 a.m. During the closure:

·         SR 99 will be fully closed between Valley St. and the southern end of the Battery Street Tunnel. Traffic traveling through Seattle via SR 99 will be directed to I-5 north of Seattle at 85th St. or south of Seattle at E Marginal Way and Spokane St. More information about alternate routes during construction may be found at: http://www.seattle.gov/transportation/mercercorridor.htm

·         Mercer St. will be fully closed to traffic between 5th Ave. N and Dexter Ave. N. Traffic heading east towards I-5 will be detoured to Harrison and Broad streets at 5th Ave. N and will reconnect to Mercer St. at 9th Ave. N to continue east.

·         The I-5 on- and off-ramps at Mercer Street and Broad Street will remain open during the weekend work.

Early warning signs will be available in advance of the SR 99 lane restrictions. Travelers can expect significant traffic and delays and should plan ahead and use alternate routes.


Project and Construction Information

Email: mercerinfo@seattle.gov

24-hour Construction Hotline: (206) 419-5818


For more information about project purpose, benefits, and other information, visit our website at www.seattle.gov/Transportation/mercercorridor.htm.


If you need this information translated, please call (206) 733-9990.

Si necesita traducir esta información al español, llame al (206) 733-9990.

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