Helicopter avalanche control plays a critical role in mitigating the significant threat posed by avalanches in mountainous regions, particularly on National Forest lands in the United States, where they claim 25 to 30 lives annually—more than any other natural hazard. To mitigate this danger, professionals employ controlled avalanche operations to manage snow buildup and protect both the public and critical infrastructure, such as highways and ski resorts.
How Helicopters Aid in Avalanche Prevention
Many avalanche-prone areas are remote and lack reliable data, making traditional mitigation efforts challenging. To address this, helicopters are deployed to drop explosives into dense snowpack, triggering small, controlled avalanches. This proactive approach prevents large, unpredictable slides that could endanger lives and property.
Helicopter avalanche control preparation on a ski hill
Helicopters are the preferred method for avalanche control due to their precision, efficiency, and ability to access rugged terrain. Their capacity to hover and maneuver in tight spaces ensures targeted explosive placement, minimizing risk to operators and surrounding areas.
Types of Explosives Used in Avalanche Control
The types, size, and composition of explosives used in avalanche mitigation vary based on terrain, weather conditions, and snowpack density. One commonly used mixture is a 27.6-pound charge of ammonium nitrate combined with diesel fuel. Other compounds employed in avalanche control include:
- Trinitrotoluene (TNT)
- Pentaerythritol tetranitrate (PETN)
- Cyclotrimethylenetrinitramine (RDX)
- Tetrytol
- Ammonium nitrate
- Nitroglycerin
These materials are carefully selected and handled by trained professionals to ensure safe and effective results.
Collaborative Efforts for Safer Slopes
Avalanche control is a collaborative effort involving the Department of Transportation, local ski resorts, and private property owners. Their combined expertise ensures the safety of both control crews and the public, preventing prolonged road closures and travel disruptions.
Advancing Technology: Towers and Helicopter Support
While new technology has introduced remote-controlled avalanche mitigation towers, helicopters remain essential to the process. These strategically placed towers, equipped with LiDAR mapping for precise snow depth analysis, allow for remote detonation without human involvement. They are powered by solar or wind generators, reducing reliance on vulnerable supply lines.
However, helicopters play a critical role in maintaining this infrastructure. They are used to install, reload, inspect, and service the towers, ensuring continued operational effectiveness throughout the winter season.
Partner with Fair Lifts for Avalanche Control
Fair Lifts provides expert helicopter support for avalanche control operations, ensuring safety, efficiency, and precision. To learn more about how we can assist with your avalanche mitigation needs, call 1-800-318-8940 today!