Landslide image courtesy of WYDOT

By KERRY SMITH BUCK

Jackson, Wyo. – A massive landslide on June 8 occurred about two miles from a major mudslide one day earlier on the same highway over Teton Pass.

No one was injured in either episode.

The first event – mudslide at the head of Talbot Canyon at milepost 15 along State Highway 22/Teton Pass – happened on Friday, June 7. Wyoming Dept. of Transportation geologists and engineers are mitigating the damage and designing and installing a box culvert for increased drainage.

The mudslide, which occurred two days prior to the landslide, occurred just 2.2 miles from the Teton Pass landslide that took place on Saturday, June 8.

Here is a link to a drone photo of the mudslide:

https://www.dot.state.wy.us/files/live/sites/wydot/files/shared/Public%20Affairs/Media%20Kit/Teton%20Pass%20mudslide_MP15.JPG

Regarding the landslide, WYDOT engineers noticed a large crack that appeared across both lanes of the highway on Thursday, June 6. The crack measured about eight inches deep in some spots. Within 24 hours, WYDOT awarded emergency temporary repair work to Jackson, Wyo.-based Evans Construction, who began works to repair the section of State Highway 22 on June 7. But despite the emergency repair work, on June 8 a huge chunk of the highway at milepost 12.8 fell away, making the road unusable.

This stretch of highway connects Jackson, Wyo. with Victor, Idaho and in the summer receives nearly 15,000 vehicles worth of traffic in a 24-hour period. It is a critical mountain highway.

WYDOT Resident Engineer Bob Hammond attributed the “Big Fill” landslide to an increase in snowmelt and heavy rain.

Work is underway to build a temporary detour route but it will not be available to tractor-trailer vehicles.

Here is a link to the landslide:

https://www.dot.state.wy.us/files/live/sites/wydot/files/shared/Public%20Affairs/Media%20Kit/Teton%20Pass_big%20fill%20slide_3.JPG