Northgate Pedestrian/Bike Bridge construction update

The following construction activities will be taking place over the next several weeks.
East side of I-5 (1st Ave NE between NE 92nd St and NE 107th St)
  • Electrical work
  • Catch basin work
  • Demolition and installation of curb ramps at NE 92nd St and NE 94th St
  • Sidewall support work
  • Placing bridge spans
  • Installation of reinforced concrete for column work
  • Installing steel reinforcements and pouring concrete structures for bridge support
  • Installation of shoring structures
  • Placement of lightweight fill
West side of I-5 (north side of North Seattle College and along N 100th St) 

  • Grading and paving for curb ramps
  • Installation of bridge deck forms and concrete

I-5 median (near the I-5 northbound express lane at NE 103rd St)  

  • Preparation and staging for first bridge span delivery
  • Installation of deck forms
  • Nighttime testing of materials

Upcoming bridge span installation over I-5
The next major milestone will be the installation of spans across I-5 in May 2021. During this work, they’ll erect 2 bridge spans; each will be assembled in the median of I-5, moved into place using self-propelled transporters (essentially, mini remote-controlled cars), and lifted by cranes.

What to expect during construction

  • Some noise and construction vehicle activity, including cranes
  • Some nighttime and weekend work
  • Detours for people walking and biking
  • Lane reductions on Northgate express lane on- and off-ramp
  • 2 freeway closures and detours (on weekends and at night only)
  • Construction staging and parking impacts near the construction sites, including at the north side of North Seattle College along N 100th St and on NE 100th St at 1st Ave NE
  • Closure of the North Seattle Park & Ride on 1st Ave NE

Questions during construction? Contact:

Darrell Bulmer
(206) 905-3620

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