Northgate Ped/Bike Bridge Project Update – Nov 23, 2020

The following construction activities will be taking place over the next several weeks:

Long-term single-lane closure of I-5 express lane off-ramp (at 1st Ave NE and NE 103rd St)

A long-term single-lane closure of the express lane off-ramp at 1st Ave NE and NE 103rd St will remain in effect over the next several months. One lane on the express lane off-ramp will remain open during the regularly scheduled express lane daytime hours of 8 AM to 11 PM.

East side of I-5: 1st Ave NE (between NE 92nd St and NE 107th St) 

• Construction of temporary handrails and walkways
• Installation of bridge deck forms
• Electrical work
• Installation of bridge falsework
• Removal of temporary shoring structure near the I-5 northbound express lane at NE 103rd St
• Placement of concrete for new sidewalk and curb ramp
• Installation of cast-in-place concrete girders for what’s commonly known as the “hairpin turn”

West side of I-5 (north side of North Seattle College and along N 100th St) 

• Electrical installation at the north entrance of the college

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

• Concrete work for pier columns
  • Placing forms and rebar cages
  • Placing concrete
  • Allowing concrete curing time
  • Removing the forms
• Electrical work

Upcoming work

Construction will continue through the end of 2020 and in 2021. In March 2021,  2 bridge spans will be erected over I-5. Each span will be assembled in the median of I-5, moved into place using self-propelled transporters, and lifted by cranes. In the new year there will be information about nighttime and weekend work related to this work.

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 us:

Darrell Bulmer
NorthgateBridge@seattle.gov
(206) 905-3620
www.seattle.gov/transportation/NorthgatePedBridge.htm