Artillery has played a surprising—and distinctly American—role in avalanche mitigation, blending military surplus, mountain safety, and pragmatic problem-solving. What began as postwar improvisation evolved into a standardized practice that has protected highways, ski areas, railroads, and mountain communities for more than 70 years.
The origins of artillery-based avalanche control in the United States date to the early 1950s. After World War II, the U.S. military had an abundance of surplus weapons, while western states faced recurring avalanche fatalities and transportation shutdowns. In 1951, the Washington State Department of Highways, working with the U.S. Forest Service and the U.S. Army, conducted pioneering experiments at Stevens Pass. Using military artillery to intentionally trigger avalanches, they demonstrated that releasing unstable snow under controlled conditions was far safer than waiting for natural releases.
These early trials proved highly effective. The use of 105mm howitzers allowed avalanche crews to trigger slides remotely on steep, inaccessible terrain during storms—conditions that made manual control work dangerous or impossible. By the mid-1950s, artillery avalanche control had moved from experiment to established practice, supported by formal agreements between state agencies, ski areas, and the military.
During the Cold War era, artillery became the backbone of avalanche mitigation across the western United States. Decommissioned weapons such as 75mm recoilless rifles and 105mm howitzers were transferred to civilian use. Ski areas including Alta, Snowbird, and Jackson Hole, along with departments of transportation in Utah, Colorado, Montana, Washington, and Alaska, built entire control programs around these systems. Crews were trained extensively, often with military assistance, to ensure safe handling and accurate fire.
Artillery offered several key advantages. It allowed control teams to work from protected locations, reduced exposure to avalanche terrain, and enabled reliable control work during severe weather. For decades, it was considered the most effective large-scale avalanche mitigation tool available.
By the late 20th century, challenges emerged. Aging weapons became difficult to maintain, ammunition supplies declined, regulatory scrutiny increased, and concerns about unexploded ordnance grew. At the same time, new technologies such as Gazex exploders, Wyssen towers, and helicopter-deployed explosives offered alternatives with fewer logistical constraints.
Today, artillery remains in limited but important use, particularly for highway avalanche control in extreme terrain. Its legacy reflects a uniquely American approach to mountain safety: adapting existing tools to solve serious problems in unforgiving environments. While modern systems continue to evolve, artillery’s role in avalanche mitigation remains a foundational chapter in the history of snow safety in the United States.