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 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.
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 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.
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.
A training film about the dangers posed by avalanches and the methods to control them in Alta, Utah. An airborne avalanche occurs as snow moves down a dam slide. Some of the snow whirls up with the wind while the rest falls on the ground. Snow moves down as a snow cloud is formed along the slope of Mount Superior. Means of forecasting avalanches include a dropping barometer and a wind wane indicating direction of wind blow. Snow blows from the slope of one mountain to another. A gust thermometer to measure velocity variation of wind. A graph indicates wind speed in miles per hour.
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