Landslide potential is based on slope and lithology. Landslide is considered probable if the slope is 12 percent or greater and correlated with a formation known to contain shale, unconsolidated sediments or surficial materials greater than or equal to 20 feet in thickness; and if the slope is greater than 20 percent. Slope values are the same as those used by Hoffman (1995, 1997, 1999) in previous maps to determine landslide hazard and were based on field research in Jefferson County. This project was funded by Missouri State Emergency Management Agency.
Although all data in this data set have been compiled by the Missouri Department of Natural Resources, no warranty, expressed or implied, is made by the department as to the accuracy of the data and related materials. Acknowledgement of the Missouri Department of Natural Resources, Division of Geology and Land Survey would be appreciated for products derived from this data. This data set is not designed for use as a primary regulatory tool in permitting or siting decisions, but may be used as a reference source. Users are responsible for the appropriate application of this data.
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