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Landslides constitute a major geologic hazard because they are widespread, occur in all 50 states and U.S. territories, and cause $1-2 billion in damages and more than 25 fatalities on average each year.

Landslides pose serious threats to highways and structures that support fisheries, tourism, timber harvesting, mining, and energy production as well as general transportation. Expansion of urban and recreational developments into hillside areas results in ever increasing numbers of residential and commercial properties that are threatened by landslides. Landslides commonly occur in connection with other major natural disasters such as earthquakes, volcanoes, wildfires and floods. Effects of these disasters exacerbate relief and reconstruction efforts. Growth of urban areas and expanded land use elsewhere have increased the incidence of landslide disasters.

Landslide and Mudslide - PDF