| Title | Date | Type | Setname | ||
|---|---|---|---|---|---|
| 251 |
 |
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; 1969 | Image | uum_map_usa |
| 252 |
 |
Keith Langson of the National Ski Patrol pointing to a deposit area in the canyon below. | 1968 | Image | uum_map_usa |
| 253 |
 |
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; 1969 | Image | uum_map_usa |
| 254 |
 |
Looking south from Cardiff area toward Alta. Collins Gulch area and adjacent avalanche parks. | 1941 | Image | uum_map_usa |
| 255 |
 |
Looking south from Cardiff area toward Alta. Collins Gulch area and adjacent avalanche parks. | 1941 | Image | uum_map_usa |
| 256 |
 |
Man pointing to a fracture line approximately 1 foot in depth at the upper area of ? | 1968 | Image | uum_map_usa |
| 257 |
 |
Man setting a charge with an electric detonator, with an explosive detonating in the snow in the background. | 1948 | Image | uum_map_usa |
| 258 |
 |
Measurement equipment | 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; 1969 | Image | uum_map_usa |
| 259 |
 |
Men buiding cornice control fences on Mt. Baldy. | 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; 1969 | Image | uum_map_usa |
| 260 |
 |
Men preparing to blast mountain as a part of avalanche control on Mt. Superior. | 1966-02 | Image | uum_map_usa |
| 261 |
 |
Men working at the Albion gun tower. | 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; 1969 | Image | uum_map_usa |
| 262 |
 |
North Rustler/Eagles Nest with Rustler chairlift and avalanche debris at top of terminal | 1948 | Image | uum_map_usa |
| 263 |
 |
Pack howitzer used in avalanche control at Alta. | 1967-02 | Image | uum_map_usa |
| 264 |
 |
Pack howitzer used in avalanche control at Alta. | 1967-02 | Image | uum_map_usa |
| 265 |
 |
Remains of Alta Lodge and nearby premises after they were hit by an avalanche. | 1973-12; 1974-01 | Image | uum_map_usa |
| 266 |
 |
Remains of Alta Lodge and nearby premises after they were hit by an avalanche. | 1973-12; 1974-01 | Image | uum_map_usa |
| 267 |
 |
Remains of Alta Lodge and nearby premises after they were hit by an avalanche. | 1973-12; 1974-01 | Image | uum_map_usa |
| 268 |
 |
Remains of Alta Lodge and nearby premises after they were hit by an avalanche. | 1973-12; 1974-01 | Image | uum_map_usa |
| 269 |
 |
Remains of Alta Lodge and nearby premises after they were hit by an avalanche. | 1973-12; 1974-01 | Image | uum_map_usa |
| 270 |
 |
Remains of Alta Lodge and nearby premises after they were hit by an avalanche. | 1973-12; 1974-01 | Image | uum_map_usa |
| 271 |
 |
Small surface sluff of slab type set off by hand charges in the left bottom area of photo. | 1948 | Image | uum_map_usa |
| 272 |
 |
Snow settlement gauge. | 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; 1969 | Image | uum_map_usa |
| 273 |
 |
Summer view of debris from a large avalanche in White Pine | 1969-05 | Image | uum_map_usa |
| 274 |
 |
Summer view of debris from a large avalanche in White Pine | 1969-05 | Image | uum_map_usa |
| 275 |
 |
Summer view of debris from a large avalanche in White Pine | 1969-05 | Image | uum_map_usa |