Laramie, Wy – The huge winter storm that hit western Wyoming this week, left up to two feet of snow in the mountains. This meant the Wyoming Department of Transportation had to artificially cause avalanches and close roads. Spokesperson Laura Grossnickle says the Teton Pass and the highway between Pinedale and Jackson shut down Tuesday morning while workers triggered avalanches. They do this to prevent a slide from coming down on its own when the roads are open. Grossnickle says actively managing avalanches works and haven't damaged roads. She says the last time an avalanche took out a highway was in the 1940s.