Landslides commonly occur as a result of:
- Heavy rainfall.
- Rapid snowmelt.
- A wet winter and spring, particularly if previous
years were also wet.
- Grading that removes material from the base, loads
material at the top, or otherwise alters a slope.
- Earthquakes.
- Erosion or previous landsliding removing material
from the base of a slope.
- Addition of water to a slope from agricultural or
landscape irrigation, roof downspouts, poor drainage,
septic-tank effluent, canal leakage, or broken water
or sewer lines.
- Existing landslides.
- Steep natural slopes, particularly in weak geologic
materials.
- Steep construction-related cut or fill slopes.
- Areas in or at the mouths of drainages (such as canyons).
- Slopes below leaking canals or ponds.
- Developed hillsides where septic-tank soil-absorption
systems are used and landscapes are irrigated.
- Below cliffs or hills with outcrops of fractured
rock.
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Introduction
Three common types
of Utah landslides
Why landslides commonly occur
Areas generally prone to landslides
Features indicating
landslide movement
How you can reduce
the likelihood of landslide
What to do
if you suspect imminent landslide danger
For further information
on landslides in your area
References
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