Rock blasting-related closures are planned to close Interstate 90 east of Snoqualmie Pass for an hour four days next week.

The Washington State Department of Transportation and contractor crews will close I-90 at 5:30 p.m. to 6:30 p.m. each nightMonday, Oct. 20 through Thursday, Oct. 23. During rock blasting closures, eastbound drivers will be stopped at milepost 56 and westbound drivers will be stopped at milepost 61.

Drivers may experience minor delays during the day and at night due to lane closures in both directions between mileposts 47 to 61. Intermittent rolling slowdowns could cause minor delays Monday through Friday between mileposts 56 to 61.

Crews will be making repairs to the roadway near Kittitas, mileposts 115 to 122 from 8 a.m. to 4 p.m. Monday, Oct. 20, Wednesday, Oct. 22 and Thursday, Oct. 23.