 UDOT's Avalanche Safety Program Manager, Stephen Clark, said that by using this technology, they will be able to enhance the safety and become even more effective at preventing avalanches from reaching the roads. For 75 years, the Howitzer guns had been used in the Alto Ski Area since 1949 and were retired following the most recent ski season. During that time, it's believed they had fired over 33,000 rounds of ammunition