I-5 and 116th Street Upgrades


Phase 4 begins early 2018 with limited short overnight closures

TULALIP, Wash. –  The Tulalip Tribes has been leading this interchange improvement project for many years.   Last year saw the completion of Phase 3 of the interchange improvements that replaced the existing three-lane bridge with a six-lane bridge and connected the widening of 116th east and west of the interstate.  Phase 4, which will begin construction in early 2018, will construct new wider ramps with more turning lanes and remove the existing ramps.  The existing two ramp intersection signals will be removed and combined into one ramp signal on the center of the bridge over I-5.  This one signal will put the interchange in to a Single Point Interchange configuration, which will have enough capacity to handle the growth in the area for the next 20 years. Phase 4 is the final phase of interchange improvements for this project.

Construction of Phase 4 will begin ‘on the ground’ very early in 2018 and be completed in the fall of 2018.  Impacts to traffic during construction will be even less than they work during the construction of Phase 3.  I-5 closures are limited to a handful and they are short overnight closures of 8 hours or less.  Ramps will be narrowed and shifted with restriping, traffic safety drums, and concrete barriers in the early phases of construction.  Ramps will each have a few overnight closures to shift traffic lanes and lay asphalt over the course of the summer 2018.  The street will stay open in both directions except during the erection of the signal bridge on top of the bridge over I-5.  This one time closure is planned for one night in the late summer of 2018.  These limited impacts to traffic during construction should not delay drivers significantly in 2018.

We are very excited to see the completion of this regional interchange improvement next year and we are thankful for the partnering, support and participation by BIA, FHWA, WSDOT, Snohomish County, City of Marysville and Community Transit to develop and implement these improvements for our community and the greater Snohomish County and State of Washington.

We are equally excited to focus our attention again on safety and access improvement needs to the interchanges that serve The Tulalip Tribes Indian Reservation and City of Marysville including 88th St NE Interchange and 4th St Interchange.

For more information, contact Debbie Bray, Tulalip Transportation Manager, at 360-716-5024 or by email at dbray@tulaliptribes-nsn.gov