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A gun fired at Alta's Rustler Mountain leads triggers intentional avalanche to protect ski areas of Alta, Utah.
A documentary about the dangers posed by avalanches and the methods to control them in the mountainous regions of the United States. The Utah National Guard gun crew and forest rangers work on an artillery gun. A gun is fired, a high explosive shell hits at Rustler Mountain of Alta resort. Snow avalanche is triggered and drifts down the slope. The controlled avalanche reduces the chances of an uncontrolled avalanche in the near future. A snow ranger looks through binoculars as he keeps a vigil to check for any avalanches. Men ski along the snow covered slopes.
U.S. Forest Service actions to study snow avalanches and protect the skiing public
People are seen skiing down the slopes of snow covered mountains in Utah. Then, an avalanche of snow is shown across a valley. It thunders down the mountainside covering trees and everything in its path and rapidly approaches the camera position. Scene shifts to a Snow Ranger of the U.S. Forest Service. View of badges worn by such Rangers. View of the Snow Ranger headquarters in Alta, Utah, where avalanche studies are conducted. Camera pans along a swath of deep snow on a mountainside.
A gun fire triggers off an avalanche and snow is removed with a machine in Alta, Utah.
A training film ' Avalanche Control ' about the dangers posed by avalanches and the methods to control them in Alta, Utah. Men set up a gun and fire it at a snow covered slope. Snow drifts down the slopes as an avalanche occurs. Steep mountains, open slopes and a snow covered area in Alta, Utah. A highway amidst a snow covered area leading to a ski resort. A machine removes snow from the area. An avalanche affected area near a ski resort. Another area with uprooted and displaced electric poles after an avalanche.
Different types of avalanches occur as snow drifts down a slope into a valley in Alta, Utah.
A training film about the dangers posed by avalanches and the methods to control them in Alta, Utah. People enjoy skiing in Alta, Utah. A skier comes down a steep slope. Snow flakes fall on a red surface. A man walks on a level snow covered ground. Wind blows away snow. Steep slopes along mountains susceptible to avalanches. Different types of avalanches like the small snow drift. Snow comes down a slope without posing any danger to life and property. Another type of avalanche is flood avalanche where an enormous mass of snow crashes into the valley posing a great threat to life and property.
A valley affected by a slab avalanche in Alta, Utah.
A training film about the dangers posed by avalanches and the methods to control them in Alta, Utah. An area susceptible to slab avalanches. A fracture of a crack line along an area from where the snow breaks away due to unstable conditions. An area affected by slab avalanche. Blocks of snow along the avalanche path. The valley swept by an avalanche.
An artillery shell hits a slope and a slab avalanche is set in motion bringing down enormous snow in Alta, Utah.
A training film about the dangers posed by avalanches and the methods to control them in Alta, Utah. Shallow dry snow avalanche occurs as snow slides down a surface, without causing any harm. An artillery shell hits a mountain slope and a slab avalanche is set into motion. An enormous mass of snow comes down posing a danger for life and property. Another slab avalanche occurs as the entire slope is set in motion.
