Project overview
During summer 2025, contractor crews will repave an 11-mile stretch of northbound and southbound I-5 between Koontz Road (milepost 69.44) and the SR 507 interchange (milepost 81) in Lewis County.
This project will repair worn pavement on northbound and southbound I-5 by removing old asphalt and replacing it with new pavement. Work includes grinding and paving all travel and auxiliary lanes and fixing sinkholes, drainage, and pavement markings.
Paving work will wrap up this fall. Crews will return in 2026 when weather allows to repair five bridges, including membranes, expansion joints and compression seals. This will help to keep the bridges safe and in good condition.
What to expect
During construction, I-5 travelers can expect daytime and nighttime lane closures and reduced speeds, with most work taking place overnight.
Paving work depends on warm, dry weather conditions to ensure long-lasting results. There’s never a good time to close lanes, and delays can be frustrating, but these improvements will make I-5 safer, smoother and more reliable for years to come.
During summer 2025 contractor crews working for WSDOT will work to repair the driving surface along an 11-mile stretch of I-5 in Lewis County, between Koontz Road and the SR 507 interchange.
I-5 is a major highway running 1,381 miles north–south through California, Oregon, and Washington. It connects major cities like Portland and Seattle and is the main interstate along the West Coast. Keeping it in good condition helps ensure people, goods, and services can move safely and efficiently.
Over time, weather and heavy traffic have worn down this stretch of I-5, creating ruts, potholes, and uneven pavement. If left unrepaired, the road will continue to deteriorate, leading to safety hazards, costly repairs, and possible emergency closures. This project will repave I-5 between Koontz Road and the SR 507 interchange in Lewis County, smoothing the driving surface, improving safety and extending the highways useful life.