Project overview
This project repaired and improved the southbound I-5 travel lanes between Blaine and the Nooksack River crossing just south of Ferndale. Along this 10-mile stretch of southbound I-5 in Whatcom County, the freeway lanes, shoulders, and some on- and off-ramp connection points were showing signs of deterioration, including potholes, cracks, and ruts.
Contractor crews working on behalf of WSDOT removed old pavement and re-paved the southbound lanes, shoulders, and some ramp connections to the freeway where necessary. Additionally, new, upgraded guardrail and cable barrier were installed on the shoulders and center median and upgraded traffic counters in both directions of I-5 between Main Street (mileposts 263) in Ferndale and north of Birch Bay Road (milepost 273) south of Blaine.
What to expect
Construction finished in November 2025. Travelers should not expect additional travel delays for this project.
In Whatcom County, southbound Interstate 5 is an important and vital highway that is in need of rehabilitation as the surfaces have deteriorated over time. Many now have a patchwork of repairs to fill potholes, ruts and cracks. This work will extend the life of the highway and provide a smoother and safer ride for all travelers.