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TitleDateType
176 Forest Service and Military personnel studying the 75mm recoilless rifle.1966-02Image
177 Forest Service and Military studying 75 mm sites.1966-02Image
178 Forest Service rope top and gun tower looking northeast from the parking area.1964-06Image
179 Forest Service Supervisor, F.C. Koziol, and area owner, Zane Doyle, examining 75mm recoilless rifle casing used in avalanche control work.1963Image
180 Fracture line at snow defense structure.1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950; 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960; 1961; 1962; 1963; 1964; 1965; 1966; 1967; 1968; 1969Image
181 Fracture line of major slab type in Peruvian Gulch, Little Cottonwood Canyon.1948Image
182 Fracture line on lower Mt. Baldy shoulder1955Image
183 Fracture line on Mt. Baldy shoulder1955Image
184 Fracture line on Mt. Baldy shoulder1950; 1951; 1952; 1953; 1954; 1955Image
185 Fracture line on Mt. Baldy shoulder1948Image
186 Fracture line running through snow defense structures.1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950; 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960; 1961; 1962; 1963; 1964; 1965; 1966; 1967; 1968; 1969Image
187 Fracture line running through snow defense structures.1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950; 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960; 1961; 1962; 1963; 1964; 1965; 1966; 1967; 1968; 1969Image
188 Fracture line running through snow defense structures.1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950; 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960; 1961; 1962; 1963; 1964; 1965; 1966; 1967; 1968; 1969Image
189 Gropel type snow which provided the sliding base for an avalanche.1968Image
190 Group discussion at Avalanche School1959Image
191 Group discussion at Avalanche School1959Image
192 Group snapshot of the Avalanche School participants1959Image
193 Group snapshot of the Avalanche School participants.1959Image
194 High Rustler slide path in Alta1961Image
195 Interior of a building hit by an avalanche.1964Image
196 Interior of a building hit by an avalanche.1964Image
197 Interior of a building hit by an avalanche.1964Image
198 Interior of a building hit by an avalanche.1964Image
199 Keith Langson of the National Ski Patrol pointing to a deposit area in the canyon below.1968Image
200 Large artillery piece used in avalanche control.1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950; 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960; 1961; 1962; 1963; 1964; 1965; 1966; 1967; 1968; 1969Image
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