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Drivers traveling westbound on Interstate 90 will have a single-lane restriction between Preston and Issaquah through Thursday at 9 p.m. This will allow contractors to continue round-the-clock repairs on the .

When this section of I-90 was built in the 1970s, a retaining wall was built near milepost 19 to cap an old coal mine. However, over the years that mine has collected water, which eventually seeped under I-90. This caused the concrete pavement to crack. Contractor crews built a new drainage system to keep the water away from the roadway before replacing the damaged pavement.

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Over the past year, this section of highway has seen lane restrictions often resulting in three to four-mile backups during peak hours. A few more multi-day closures are needed to complete this project, which is expected to wrap up this fall.

Drivers should plan for delays, seek alternate routes, travel during non-peak hours, or work from home this week if possible.