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May 28, 2025

New closure dates for I-90/SR 18 work

By JOURNAL STAFF

SNOQUALMIE — Both directions of state Route 18 will close under the Interstate 90 bridges from 9 p.m. on Thursday night until 5 a.m. on June 4 as crews build the southern end of a new interchange near Snoqualmie.

The Washington State Department of Transportation said that crews with its contractor Aecon will install new drainage and electrical crossings, pave new roadway and build concrete islands that will form the southern portion of the new I-90/SR 18 diverging diamond interchange.

Work also includes building a left-turn pocket for traffic turning from westbound SR-18 onto Southeast 104th Street, and a signalized U-turn south of I-90 that will allow eastbound SR-18 traffic to head westbound toward Auburn. Both will be operational when SR-18 reopens June 4.

WSDOT had previously scheduled a five-day closure for earlier this month. The weather, however, did not cooperate, and the closure was postponed.

The diverging diamond interchange is scheduled to open this summer, with SR-18 widening expected later this year.




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