P0393n01_13_001: Avalanche control on Mount Superior, picture taken by Horton, February 1966
P0393n01_13_002-003: Brighton Ski Patrol using avalanche guns, picture taken by Horton, February 1966
P0393n01_13_004-005: 75 Recoilless used in avalanche controls, picture taken by Horton 1963
P0393n01_13_006-010: United States Army - Dugway Proving Grounds Cooperate with Wasatch National Forest in testing 4 - 2 mortar, March 1966
P0393n01_13_011: Forest Supervisor, F.C. Koziol and area owner Zane Doyle, examining 75 mm Recoilless Rifle casing used in avalanche control work. Picture taken by Julian Thomas, 1963
P0393n01_13_012: Contact print firing mortar in early avalanche tests
P0393n01_13_013: United States Army - Dugway Proving Grounds Cooperate with Wasatch National Forest in testing 4 - 2 mortar. This is a duplicate of P0393n01_13_012
P0393n01_13_014-015: Pack howitzer used in avalanche control at Alta picture taken by Horton, February 1967
P0393n01_13_016_1: Pack howitzer used in avalanche control at Alta, picture taken by Robert Safron, January 21, 1951
P0393n01_13_016_2: Pack howitzer used in avalanche control at Alta, 1949
P0393n01_13_017: Pack howitzer used in avalanche control at Alta. Firing of 105 recoilless rifle for avalanche control. 1949
P0393n01_13_018: Pack howitzer used in avalanche control at Alta. Firing of 105 recoilless rifle for avalanche control.
P0393n01_13_019-021: Firing of 105 recoilless rifle, picture taken by Robert Safron, 1956
P0393n01_13_022-023: Firing of 105 recoilless rifle from a position on the highway leading to Alta. The white cloud is the back blast from the gun
