A training film about the means of forecasting and controlling of avalanches in Alta, Utah. A 105 mm Recoilless Rifle fired from a tower. A 75 mm Recoilless Rifle fired from a temporary tower. The Shell impacts and snow drifts down a slope at a great speed.
A training film about the means of forecasting and controlling of avalanches in Alta, Utah. A fix mount Recoilless Rifle being fired at the snow covered slopes and no avalanche occurs. The Recoilless Rifle fired to check for occurrence of avalanches in ski areas. An avalanche launched at a little distance. A 105 mm Recoilless Rifle mounted on a vehicle. A man dislodges the corners with heels of the skis. Snow drifts down as the corners are dislodged.
A training film about the means of forecasting and controlling of avalanches in Alta, Utah. A man loads a shell into an artillery piece. Snow covered slopes of a mountain. Avalanche being set in motion as a result of artillery fire. A dust cloud being formed by the drifting snow. A secondary avalanche is triggered by the force and energy of the artillery-triggered avalanche. A man skis down a slope. Men ski down a snow covered slope. An artillery shell fired from a tower to set off an avalanche.
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 documentary about the dangers posed by avalanches in the mountainous regions of the United States. A figure about the avalanche angles depicting the anger of avalanche to be high at slopes above 40 degrees. Avalanche terrain at Mount Superior in Alta, Utah. Snow covered Halgate cliff. A figure depicts the avalanche fracture points on straight, convex and concave slopes. An avalanche comes down a slope. Snow water falls down a cliff and gives boost to its velocity. A snow covered house. A man walks on a snow covered surface. Snow waves blow from a mountain peak. A snow storm blows above a canyon. A figure depicts various weather factors that cause avalanche like rate of fall, wind force, temperature and wind direction.
A documentary about the dangers posed by avalanches and the methods to control them in the mountainous regions of the United States. A snow ranger on Mount Baldy in Alta, Utah prepares a package of avalanche starters. Ranger works on cables and a pack of explosives. He tosses the charge onto an avalanche slope. A slide pass being treated. Snow comes rolling down the pass. Snow comes down the same slope on another day. Corners of the slide being treated as ranger digs and plants a charge. Snow blown away. A safety rope helps the ranger stay on top as the explosive goes off in the corner.
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