Full closure of SR 520 and the Montlake Bridge planned for Nov. 20-21 weekend; closures begin late Friday night

Old Lake Washington Boulevard off-ramp crossing SR 520 to be removed

SEATTLE – Travelers should plan ahead and find alternate routes for trips across Lake Washington and through Montlake, Saturday, Nov. 20, and Sunday, Nov. 21, as both State Route 520 and the Montlake Bridge will be closed all weekend.

SR 520 closure

Beginning Friday night, Nov. 19, contractor crews working for the Washington State Department of Transportation will close State Route 520 all weekend to remove an old SR 520 overpass. The old overpass dates back to the 1960s. It was used for decades as the entrance to the former Museum of History and Industry in the Montlake neighborhood and recently repurposed as the off-ramp to Lake Washington Boulevard.

Crews shifted the Lake Washington Boulevard off-ramp onto the new lid in October so that the overpass could be removed this weekend. Once the overpass is out of the way, crews will extend the new lid east over SR 520.

The work is part of the $455 million SR 520 Montlake Project to construct new, seismically resilient eastbound lanes between Montlake Boulevard and the floating bridge. In addition to the new lid and future transit center, other project improvements include an enhanced Montlake Boulevard interchange and a bike and pedestrian bridge over SR 520, east of the future lid.

Montlake Bridge closure

Meanwhile, the Montlake Bridge across the Montlake Cut also will close to all travelers, including pedestrians and bicyclists, as crews continue rehabilitating the mechanical systems that raise and lower the drawbridge. This marks the final weekend closure of the bridge in 2021. Crews will complete the project’s weather-dependent work on a dry weekend in spring 2022.

Closure details

All facilities will close Friday night, Nov. 19, to 5 a.m. Monday, Nov. 22. The closure times will be staggered as follows:

9 p.m., Friday, Nov. 19

  • The Montlake Boulevard on-ramps to east- and westbound SR 520
  • The Lake Washington Boulevard on-ramp to eastbound SR 520
  • The SR 520 westbound off-ramps to Lake Washington Boulevard and Montlake Boulevard  

10 p.m., Friday, Nov. 19

  • Eastbound SR 520 between Montlake Boulevard in Seattle to 92nd Avenue Northeast in Clyde Hill
  • Westbound SR 520 between 92nd Avenue Northeast in Clyde Hill and I-5 in Seattle, including the westbound on-ramp at 84th Avenue Northeast
  • The Montlake Bridge and sidewalks between East Shelby Street and Northeast Pacific Street.

Eastbound SR 520 will remain open between I-5 and Montlake Boulevard where drivers will need to exit.

Pedestrian and bicycle access and shuttles

The Montlake Bridge sidewalks will close to pedestrians and bicyclists for much of the weekend. When sidewalks are closed, the contractor will operate a shuttle for bicyclists and pedestrians from one end of the bridge to the other, using a detour route. The shuttle pickup/drop-off location on the south end of the bridge will be along southbound Montlake Boulevard just south of Hamlin Street. The pickup/drop-off location on the north side of the bridge will be near the existing bus stop on westbound Northeast Pacific Street just west of Montlake Boulevard.

The SR 520 Trail across Lake Washington between the Evergreen Point Road in Medina and the Montlake neighborhood in Seattle will remain open.  

Keeping travelers informed

Drivers crossing Lake Washington during the weekend should take I-90 as an alternate route or consider delaying their trips if possible.

Get the most up-to-date information on closures by visiting the SR 520 Construction Corner. Other resources to stay informed:

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