With Howitzers and Helicopters, Western States Trigger Road-Clearing Avalanches

Stateline, an initiative of The Pew Charitable Trusts. By Jenni Bergal One morning last week, after more than 31 inches of snow fell in the previous two days, Utah transportation workers opened a huge garage-like door in a building near a state highway and fired a military howitzer up a mountain in the Salt Lake Valley.

Stateline, an initiative of The Pew Charitable Trusts. By Jenni Bergal One morning last week, after more than 31 inches of snow fell in the previous two days, Utah transportation workers opened a huge garage-like door in a building near a state highway and fired a military howitzer up a mountain in the Salt Lake Valley.…