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Mercer Corridor Project, SR 520 and Alaskan Way Viaduct Update

Road construction around Seattle Center associated with the Mercer West project is nearing completion, with minor and intermittent lane closures scheduled through the remainder of the summer. Please take into account the following as you route your way to and from Seattle Center, and allow extra time in your travels during this critical period of transition on our roadways.

Seattle Center Garages:  5th Ave. N. Garage:  Harrison and Republican entrances remain open, with access from NB and SB 5th Ave. N. Mercer Garage:  3rd Ave. N. entrances are open and 4th Ave. is open for permit parking and McCaw Hall events. A designated left turn lane on eastbound Mercer St. at 4th Ave. N. aids garage entry. Entry to 1st Ave. N. Garage is from 1st Ave. N. only. There are two exit lanes onto Warren St. N. and one to 1st Ave. N. 

Through summer 2015:  5th Ave. N. between Harrison and Broad streets will be restricted to one lane in each direction sporadically on weekdays, from 7am/9am-3pm, and sidewalk work will continue. The sidewalks at 5th and Broad will be restricted for pedestrians. Please follow pedestrian detour signage. 

Through summer 2015:  Mercer St. between 5th Ave. N. and 9th Ave. N. will be restricted sporadically on weekdays, 9am-3pm. A minimum of one lane in each direction will be maintained at all times. 

Elliott Bay Seawall Project:  Work continues seven days a week between Yesler Way and Madison St. Work between Madison and Pike streets has paused for the summer. In the coming weeks, jet grout installation will begin between Madison and Columbia streets. The multi-use path along the west side of the Alaskan Way Viaduct between University and Pike streets opened on Wednesday, July 1. Learn more at: http://www.waterfrontseattle.org/seawall. 

Saturday, July 25 at 12:30am to 5:30am:  Southbound I-5 will fully close in the vicinity of the Washington State Convention and Trade Center. 

Thursday, July 30 to Sunday, Aug. 2:  I-90 will be closed in both directions to all vehicles, pedestrians and cyclists between I-5 and Mercer Island during Blue Angels practice and performance at Seafair Weekend. Closure hours are 9:45am-12pm and 1:15pm-2:40pm on Thursday; and 11:50am-2:40pm on Friday, Saturday and Sunday. The I-5 and Rainier Ave. S. on-ramps to I-90 will close 30 minutes prior.  

Saturday, July 25, afternoon and evening:  Expect heavy congestion and lane/road closures around Seattle Center associated with the Seafair Pirate Run, Seattle Center/Downtown/SODO, 6:30pm to 9pm. This event will also close portions of the northbound lanes of SR-99 between South Royal Brougham Way and the Battery Street Tunnel. The Seafair Torchlight Parade will close Broad St. and 4th Agve. between Seattle Center and the International District, 7:30pm to 11pm.

Friday, Aug. 21 at 10pm to Monday, Aug. 24 at 5am:  SR-99 will be closed in both directions between Western Ave. and Valley St.

If roads around the Mercer corridor are congested, consider other options to access I-5 and SR-99 using entry points south of Seattle Center along 2nd Ave. and 5th Ave. More information about alternate routes during construction may be found at: http://www.seattle.gov/transportation/mercercorridor.htm 

Until SR-99 Tunnel opens to traffic:  6th Ave N is closed between Thomas and Republican streets. Harrison St. is closed between Aurora Ave. N and Broad St. Republican St. is closed between Aurora Ave. N and 6th Ave N. 

For the SR-99 tunnel project, visit www.alaskanwayviaduct.org or call 1-888-298-5463.

King County Metro at www.kingcounty.gov/metro or call 206-553-3000.

Sound Transit at www.soundtransit.org

Community Transit at www.commtrans.org

Seattle Center Monorail at www.seattlemonorail.com    

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