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TitleCollection Number And NamePhoto Number
1 Portion of the East Bench along the mountain front in Salt Lake County. It has been dissected by strands of the Wasatch Fault. Since this photo was taken a housing development has been built on this terrain.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n091
2 Reservoir slopes failing just upstream from dam. A failure overtopping the road would cause turbidity in the drinking water for a large city since the intake is directly downstream and in line with the current.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n033
3 Rock-debris flow from source onto road in foreground.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n016
4 Rockfall, American Fork Canyon, February 1970. Observer stands on one of the boulders of rockfall looking across at debris fan which was washed down when aquaduct was struck and severed on the mountain side. Note height at which tree in foreground was broken off by boulder.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n037
5 Same view showing notch in cut slope, the result of a failure onto the road soon after opening to traffic (p1274n030). Landsliding is predictable.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n031
6 Sandbagging of Big Cottonwood Creek to confine its flow. Bridge was temporary, to span floodwaters.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n003
7 Sediment load is a factor to be considered with surface streams. This graph shows the relationship between mean annual sediment load and mean annual precipitation for the specific environment where the mean annual temperature is 40 degrees F. Other curves may be drawn for various other mean annual temperatures. Note that in this regime sediment yield is greatest at about 8 or 9 inches of precipitation. This factor must be given careful consideration when designing flood impoundment structures. The greater the sediment load the quicker the reservoir fills up.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n022
8 September 1970 flooding, by widespread cloudburst, of the San Juan River, seen here to occupy most of its floodplain. Bridge is only link to civilization for approximately 1,000 Navajo Indians. Note that only the left one-third of bridge has escaped attack by rising flood waters (other two-thirds appear muddy). Oblique aerial view. Most of Utah is subject to cloudburst flooding from April to September. Cloudbursts are of short duration and high intensity.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n004
9 Slide of fill material in high, steep fill slope on Salt Lake City's North Bench.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n060
10 Standard Salinity Hazard chart for groundwater from all aquifers in the Bear Lake area. This chart is used for agricultural purposes. Note that all waters sampled are satisfactory for all plant types.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n071
11 Steep, high, artificial fill slopes in or near the Wasatch Fault Zone. Downslope from these fills lie dense residential developments. Atop these fills are residences. How may these earth materials be expected to react to seismic vibrations?P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n100
12 Surficial or shallow ground water is subject to pollution from buried solid wastes. Leaching of the wastes can occur in time. This excavation is for a land fill operation where ground water was encountered at a depth of less than 6 feet.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n072
13 Swelling of clay soil as it takes on additional moisture heaved up this garage floor and cracked it.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n075
14 Table listing types of geologic terrain in the Bear Lake area and their limiting factors for fluid waste disposal by individual home systems. Yellow indicates caution is required and red indicates a critical situation.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n070
15 These twin tanks deverge from bottom to top. Differential settling of their foundations caused this.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n078
16 This pattern of cracking in the unconsolidated clays and silts from ancient Lake Bonneville is the result of shrinking upon drying. Geologic material may be considered as dynamic, not static, and may deform readily under stress. Deformation may damage or destroy structures placed upon this type of geologic material.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n073
17 This water storage reservoir has failed; it was placed improperly upon a stratum of gypsum (white layers in photo) which partially dissolved.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n076
18 Undisturbed hillside failing because of lateral and vertical erosion by creek. Debris is continuously removed from toe of sliding hillside by the creek.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n064
19 Upstream from the monument was this scene in May 1969. Broken tree trunks and picnic table (beneath feet of observer in photo) recently re-exposed from under 8 feet of debris.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n013
20 View across City Creek Canyon in Salt Lake City, showing amphitheater-like appearance of ancient landslide. Houses are short distance to left of landslide.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n062
21 View across the north end of Bear Lake looking east at the truncated spurs, geomorphologic evidence of the Bear Lake Fault.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n087
22 View along the highway traffic lanes and the dam abutment at the newly created cut slope.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n030
23 Dropping of street which crossed old landslide failure plane. Note break in slope towards distance in line with fresh scarplet across street. Utility pole is seated along the slide plane.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n047
24 Engineering plan for a proposed reservoir in Salt Lake City. Note the anomalous contour spacing under the arrow. This indicates that the hillside has slid in the past. Construction of a reservoir here would inundate the toe of an ancient landslide and destroy the balance and stability of the weak landslide mass.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n025
25 Erosion caused by release of water on severance of aquaduct in foreground. Timpanogas Cave National Monument Visitor Center lies at bottom of canyon.P1274 Environmental Geology and Geologic Hazards in Utah Photograph Collectionp1274n038
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