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SR 20 Loup Loup Slide

May 1, 2019

2019-06-19 Update

The Loup Loup pass (SR 20, MP-222) has fully re-OPENED both lanes of traffic.

2019-06-05 Update

The Loup Loup pass (SR 20, MP-222) has re-opened.

Currently there is one-lane, signal controlled access in place as it was prior to the full closure.

DOT would like to thank you for your patience during the closure.

Construction is still in progress; motorist are asked to be cautious while travelling through the area.

2019-06-03 Update

At 9 p.m. on Tuesday, June 4, SR 20 will reopen to one lane of signal-controlled traffic near Loup Loup Summit at the site of a washout in early May.

Repair work is ongoing for what is estimated to be a few more weeks so drivers should expect some delays through the work zone and be alert and safe around road workers.

May 30, 2019

2019-05-23 Update

The contractor reached a point in the work that will require a full closure of the highway.

From 6:00AM Tuesday, May 28th until 9:00PM Tuesday, June 4th, the highway will be fully closed at milepost 222.4.

Westbound traffic from Okanogan toward Twisp will be detoured south along US 97; and eastbound traffic from Twisp toward Okanogan will be detoured south along SR 153.

2019-05-08 Update

The current slide area is about a mile further east from where a series of slides closed 16 miles of SR 20 in April 2017, requiring almost four months to repair

Traffic is open to ONE lane only, controlled by a traffic signal with barriers and cones in place. No vehicles more than 12 feet wide are permitted. At this time there is no estimate for when the second lane will be restored.

An emergency contractor has been named to rebuild the hillside under the eastbound lane of SR 20. WSDOT's geotechnical engineers have designed a repair plan and Hurst Construction of East Wenatchee will begin mobilizing and could begin staging equipment as soon as the weekend of May 11.

For now, the westbound lane remains stable with single-lane alternating traffic, including oversized load restrictions with no vehicles wider than 12 feet being permitted.

There is no estimate for how long the repairs will take at this time.

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This map shows the 2017 washout affected areas on the east side of SR 20 ONLY; AND th location of the slide from May 1, 2019.
View from Twisp side ground level, looking towards Okanogan direction.
View from Twisp side ground level, looking towards Okanogan direction.
View from Okanogan side ground level, looking towards Twisp direction.
View from directly above with Twisp to the left and Okanogan to the right.
View from Okanogan side looking towards Twisp direction.
View from below with Twisp to the left and Okanogan to the right.
View from Okanogan side looking towards Twisp direction.
Above view with Twisp to the left and Okanogan to the right.
View of slide. Twisp to the left and Okanogan to the right.
Above view with Twisp to the left and Okanogan to the right.
Looking to the Twisp direction.
Twisp to the left and Okanogan to the right