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State Route 520 Montlake Project online open house – Project overview

The Montlake Project will improve mobility for all travelers along the corridor. Watch the video below to learn more.

Montlake lid and bicycle and pedestrian bridge

Map of Montlake lid and bicycle and pedestrian bridge

Montlake Project timeline

We expect the Montlake Project to be complete by early 2023. Timeframes are subject to change.

2019

  • January 7, 2019
    Notice to proceed
  • January 2019 – December 2020
    Design project
  • June 2019 – Fall 2019
    Conduct preliminary work
  • Fall 2019
    Shift traffic to existing westbound bridge
  • Fall 2019 – Fall 2022
    Remove existing eastbound bridge
  • Fall 2019 – Late 2022
    Construct Montlake lid
  • Fall 2019 – Spring 2023
    Construct new eastbound bridge

2020

  • Summer 2020 – Winter 2023
    Construct bicycle and pedestrian bridge

2021

  • October 2021 – November 2021
    Remove Montlake Boulevard and 24th Avenue overpass
  • Fall 2021 – Spring 2023
    Landscape project

2023

  • Spring 2023
    Open new eastbound bridge to traffic
  • June 2023
    Complete project June 2023