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NSAA Explosives Use Guidelines and Avalanche Blasting Resource Guide

NSAA Explosives Use Guidelines and Avalanche Blasting Resource Guide 2025

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The document outlines the guidelines and resource materials developed by the NSAA for the safe use of explosives in avalanche control, following a series of fatal incidents involving explosives. It details historical accidents, the formation of safety committees, training programs, and specific operational protocols for handling explosives. The guidelines emphasize the importance of training, communication, transportation safety, and record-keeping to mitigate risks associated with explosive use in ski areas. Additionally, it addresses current challenges in explosive supply and safety measures required for using avalauncher systems.

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What materials are strong against avalanches?

Within a short space of time, the types of supporting structures changed from walls or terraces to slender, much more effective constructions made of steel, aluminium, wood, wire ropes or concrete. Today, snow bridges made of steel or flexible snow nets made of wire ropes are used.

What do they use for avalanche control?

Explosive techniques involve the artificial triggering of smaller less destructive avalanches, by detonating charges either above or on the snow surface. The explosives may be deployed by manually hand tossing and lowering, by bombing from a helicopter, or by shelling with a howitzer, recoilless rifle, or air gun.

What kind of cannon is used in the avalanche?

For the past decade or so, everyone in North America has been using the same artillery system, and its a 105-millimeter howitzer, said Clark. The howitzer is an artillery gun or cannon. ing to Clark, the kind used in avalanche mitigation shoots 35-pound artillery shells that are about three feet long.

What explosives are used for avalanche control?

Explosive techniques involve the artificial triggering of smaller less destructive avalanches, by detonating charges either above or on the snow surface.

What is the reason why explosives are used to prevent avalanches?

Road Safety Occasionally throughout the winter, roads close to allow these teams to use explosives to trigger smaller, controlled avalanches. This lessens the possibility of larger, uncontrolled avalanches occurring when the highway is open.