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December 2013
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CityLink Seattle

Mercer Corridor Project: Reminder – Next full weekend closure of SR 99 and eastbound Mercer Street scheduled for December 14 – 16

The Seattle Department of Transportation (SDOT) reminds travelers of the upcoming weekend closure of SR 99 and eastbound Mercer Street on December 14-16 for construction activities associated with the West Phase of the Mercer Corridor Project. This closure, along with the previous weekend closure, will provide for completion of critical Mercer Street widening and SR 99 bridge replacement work to meet an important deadline allowing for construction of the SR 99 Bored Tunnel’s North Portal in June of next year.

Preparatory work on eastbound Mercer Street: December 13, 10:00 a.m. to 1:00 p.m.

In preparation for the full weekend closure of SR 99 and Mercer Street, crews will reduce eastbound Mercer Street between Fifth Avenue N and Dexter Avenue N to one eastbound lane under the SR 99 bridge over Mercer Street on Friday, December 13th from 10:00 a.m. to 1:00 p.m. as crews perform saw cutting in preparation for the weekend closure. One lane on eastbound Mercer Street will remain open to traffic.

SR 99 and eastbound Mercer Street full weekend closure: Saturday, December 14 through Monday, December 16

SR 99 and eastbound Mercer Street will be fully closed to traffic beginning early Saturday morning, December 14 at 3:00 a.m. to Monday, December 16 at 5:00 a.m. for demolition of the western portion of the SR 99 bridge over Mercer Street. During the closure:

SR 99 will be fully closed to traffic between Valley Street and the southern end of the Battery Street Tunnel. Traffic traveling through Seattle via SR 99 will be directed to I-5 in northern Seattle at 85th Street or in southern Seattle at E Marginal Way and Spokane Street. More information about alternate routes during construction may be found at: http://www.seattle.gov/transportation/mercercorridor.htm.
Eastbound Mercer Street will be fully closed to traffic between Fifth Avenue N and Dexter Avenue N. Traffic heading east towards I-5 from Queen Anne will be detoured to eastbound Broad Street via Harrison Street and will reconnect to Mercer Street at Ninth Avenue N to continue towards the I-5 ramps at Mercer Street
The sidewalk on Mercer Street will also be closed between Fifth Avenue N and Dexter Avenue N. Pedestrians will be detoured to Broad Street.
Broad Street and the I-5 on- and off-ramps at Mercer Street and westbound Mercer Street will remain open during the weekend work.

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

Access to Seattle Center from I-5 via westbound Mercer and Broad streets and from southbound SR 99 at Valley Street will be open through the weekend. Travelers attending performances at Seattle Center should allow for extra travel time, due to potential delays caused by detour traffic.

Contact:  Richard Sheridan, 206.684.8540