How can a state such as Colorado control avalanches? They can use mortars, a weapon that shoots an explosive projectile into the snowpack, causing it to fall when there is no danger to property or people
below

The can send crews up to the avalanche area to remove much of the snow by sled and trough

They can use expensive but very hot lamps to melt the snow before it falls

They can send volunteers on snowshoes up to the avalanche area to stomp it down to hard-packed snow