[VIDEO] Alta, UT, Retires WWII Cannons Used for Avalanche Mitigation in Tribute Film “The Last Gunners” For 75 years, the silent hours of deep, snowy mornings at Alta Ski Area were ruptured by the reverberation of heavy artillery echoing off the surrounding granite crags. Since 1949, weapons of war have been an invaluable tool in combating the ever-looming threat of destructive avalanches in Little Cottonwood Canyon. Drop into the story of Altaโs pioneering artillery program from […] Avalanche AvyBrains | November 9, 2023 0 Comments