SR 513 - Montlake Bridge - Mechanical Rehab, Deck Replacement & Joint Repair

Project news

  • Update: the weekend closure planned for Oct. 22-25 has been postponed due to rain. The next weekend closure of the Montlake Bridge is scheduled for Oct. 29-Nov. 1
  • Until further notice: Pedestrians and bicyclists should expect regular closures of one bridge sidewalk. Access will be provided on the opposite sidewalk during closures. 
  • Sunday, Oct. 24, to the morning of Friday, Oct. 29: The northbound Montlake Bridge will close to vehicle traffic from 9 p.m. to 5 a.m. nightly with a signed detour to northbound I-5. The southbound side will be reduced to one open lane.
  • 10 p.m. Friday, Oct. 29 to 5 a.m. Monday, Nov. 1: Both directions of the SR 513 Montlake Bridge will close to all traffic; this includes vehicles, pedestrians and bicyclists. Shuttles will transport pedestrians and bicyclists from one side of the bridge to the other using a detour route. 
  • This project was awarded to Hamilton Construction Company on May 20, 2021. 
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  • Check our Flickr page for progress photos.


In 2021, contractor crews working for WSDOT will replace the more than 20-year-old worn grid deck on the Montlake Bridge. They will also make expansion joint and mechanical repairs so the movable span can continue to operate reliably and meet the growing multimodal traffic demands of northeast Seattle.

Needs & benefits

Prior to the COVID-19 pandemic, an average 40,000 to 66,000 drivers used the State Route 513 Montlake Bridge in Seattle every day. Seattle’s population has grown by more than 140,000 people in the past 10 years, and projections show no signs of it slowing down in the decade ahead. This preservation project will keep the bridge in a state of good repair as it continues to support the needs of a growing population.

What travelers need to know

This work requires multiple closures of the bridge, some for extended periods of time. Closures are required for, but not limited to, the replacement of the grid deck panels and expansion joints, and mechanical repairs. These two phases of work cannot be combined because the bridge must be in the raised position during the mechanical repairs. Crews will need access to the workspace under the bridge, between the bottom of the roadway and the mechanical apparatuses that move the span, to complete this work.

August closure

The first phase of the project will replace the metal grid deck and two expansion joints on the Montlake Bridge. This work requires a 26-day continuous around-the-clock closure to vehicle traffic. This phase is slated to begin after Seafair weekend (Aug. 9) and finish up prior to Labor Day weekend (Sept. 3). Sidewalk access on at least one side of the bridge will be maintained. Boat access in the Montlake Cut below the bridge will be maintained with some changes

Fall weekend closures

The second phase of work will repair and replace mechanical components that raise and lower the bridge. Access to vehicles will be restricted during working weekends. Pedestrian and bicycle may also be restricted at times. Boats will be able to access the Montlake Cut below the bridge. Crews expect to close the bridge on the following weekends from 10 p.m. Friday to 5 a.m. Monday. This schedule is subject to change: 

  • Sept. 10-13
  • Oct. 8-11
  • Oct. 22-25 (POSTPONED due to rain)
  • Oct. 29 - Nov. 1
  • Nov. 19 - 22


  • April 2021: Advertised for competitive bidding.
  • Summer 2021: Construction scheduled to begin.
  • Fall 2021: Construction scheduled to be complete.


Financial Data for PIN 151301B, 151301C, 151312B
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $6,178
CWA $0
Total $6,178


Joseph Calabro
WSDOT Communications

Montlake Bridge closure and detour thumbnail