Highway workers to close Teton Pass to trigger avalanches

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JACKSON, Wyo. (AP) - Wyoming Department of Transportation officials plan to close a highway so they can deliberately trigger avalanches on a mountain pass.

Avalanches closed Wyoming Highway 22 over Teton Pass on Thursday. One slide trapped a delivery truck but nobody was hurt. The department plans to close the pass again at 3 a.m. Tuesday. The route is heavily traveled by tourists and Idaho residents who work in Jackson Hole. The pass is also a popular place to ski but no overnight parking will be allowed.

The department uses a variety of methods to release avalanches and prevent dangerous disruptions. Workers fire artillery or blast compressed gas from tubes installed on mountainsides.