- Crews are now completing permanent striping and working to install a new electronic traveler information sign over the southbound lanes south of Northeast 175th Street.
- To report noise concerns, or request earplugs, please call 206-440-4DOT (4368)
- Check the I-5 construction update report for details about lane and ramp closures. Look for "I-5: NE 117th Street to SR 104 pavement repair."
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In summer 2014, crews replaced 277 concrete panels on I-5 between Northeast 117th Street near Northgate and SR 104 in Mountlake Terrace. Panel replacement work will be followed by grinding all the lanes to smooth bumps, remove wheel ruts and provide a better surface with increased traction. The work will help extend the life of the road and improve driver safety.
This project is similar to concrete grinding and replacement work WSDOT has performed on I-5 in Kent, Seattle near the Ship Canal Bridge, and I-405 near Bellevue.
Why is WSDOT
replacing concrete panels and grinding all the lanes between Northeast 117th Street and SR 104?
The pavement on I-5 through King County was first installed between 1962 and 1965. It was only intended to last through the 1980s. High traffic volumes, age and weather have all contributed to the telling signs of failing pavement - cracks, bumps and what pavement engineers call spalling. Spalling is pavement that is flaking, chipping or crumbling apart. However you might describe it, the pavement is failing and it’s time for longer lasting repairs.
Panels that are damaged beyond repair were replaced. Concrete grinding removes wheel ruts, bumps and creates a better surface for drivers. Concrete grinding is one of the best methods available right now to maintain aging concrete.
Repairing damaged concrete panels helps extend the life of I-5.
• Vehicles of varying weights pass over panels causing the concrete to flex. Cracked panels can’t flex properly, which leads to more cracking and damage.
• Normally, concrete panels expand and contract with seasonal temperature change. Cracked panels are no different, but become increasingly damaged when moisture freezes and thaws in the existing cracks.
Repairing or replacing cracked concrete panels helps keep drivers safe.
• Repairing concrete reduces bumps and cracks, making for a safer, smoother ride.
• Grinding the concrete creates more friction for vehicle tires, improving traction.
Doing the work now saves money in the long term and helps reduce the need for emergency repairs.
The End Result
Crews will replace 277 of the worst concrete panels on this stretch of I-5 and grind all the lanes. The work will help prolong the life of the road and provide a safer, smooth ride for drivers.
Improved Safety – replacing cracked concrete panels and grinding out cracks and bumps makes for a smoother, safer ride for drivers
Extends the life of I-5 - reduces the need for emergency repairs, which are costly to taxpayers and can cause unwanted congestion during peak travel periods.
What is the project timeline?
- Spring 2014 - The project advertised for competitive bidding.
- The project was awarded to Granite Construction Co. on June 27, 2014.
- Summer 2014 - Construction starts.
- Fall 2015 - The project is scheduled to be operationally complete. Operationally complete means the majority of work is done and the roadway is open to traffic.
|Financial Data for PIN 100527T, 100528Q
||Amount ($ in thousands)
|2003 Gas Tax (Nickel Funding)
|2005 Gas Tax (TPA)
|Pre-Existing Funds (PEF)
Project signage will reflect the cost of construction engineering, project bid award and sales tax.
How can I get more information?
Mary Ann Reddell
WSDOT Project Engineer
Phone: (206) 440-4704
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