Northgate Ped/Bike Bridge Update

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

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 for 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)

• Electrical work
• Demolition and installation of curb ramps at NE 92nd St and NE 94th St
• Nighttime grading and curb work on northbound 1st Ave NE at 107th St
• Sidewall support work
• Placing bridge spans
• Installing steel reinforcements and pouring concrete structures for bridge support
• Installation of shoring structures
• Installation of bridge decking and handrail

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

• Grading (leveling land) for bridge landing and trail
• Grading and pouring concrete for sidewalks, curb ramps, and gutters
• Demolition of southbound College Way N
• Grading of northbound and southbound College Way N
• Electrical work for lighting at the north entrance of the college

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

• Preparation and staging for bridge span deliveries

Next steps

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, and lifted by cranes. The first set of spans will be delivered in February and the second set will arrive in March. They’ll be in touch in the coming months with information about nighttime and weekend detours 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:

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