The Washington State Department of Transportation (WSDOT) reminds travelers that Blewett Pass on Highway 97 will be closed in both directions to all traffic from 9 p.m. on Sunday (Sept. 9), to 9 a.m. on Friday, Sept. 14, to replace three culverts under the highway. The road will be closed at milepost 157.6 on the south, and at milepost 169 on the north.

There are no detours available around the work zone. With an average of 6,100 vehicles crossing Blewett Pass each day, travelers will need to use alternate routes such as Interstate 90 or U.S. 2.

Work began a week before the closure and will continue after. WSDOT said that in addition to the full closure, the culvert projects may require intermittent weekday single-lane closures throughout the month of September. When necessary, both directions of US 97 will alternate through a single lane during daytime hours.

WSDOT said the existing culvert on Swauk Creek is a barrier to salmon and resident trout, and the other two culverts have a history of plugging up with debris during storms, leading to washouts.

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