JE Fuller/Hydrology & Geomorphology Inc. (2005, 2007a, 2007b) None vector digital data Tempe, Arizona unpublished - consultant's report Digital data at 1:24,000 William R. Lund, Tyler R. Knudsen, Garrett S. Vice, and Lucas Shaw; Utah Geological Survey 2008 UGS Special Study SS 127 Salt Lake City, UT Utah Geological Survey Erosion_Hazard_Zones withheld This dataset represents erosion hazard zones St George - Hurricane metropolitan area, Washington County, Utah at a scale of 1:24,000. The data can be used for analysis and display at 1:24,000. The purpose of this study is to provide planners and other city and county officials with information on the kind and location of geologic hazards and adverse-construction conditions that may impact existing and future development in the St. George - Hurricane metropolitan area. en 2008 publication date Complete None planned -113.676975 -113.435129 37.142590 36.996261 1005871.524508 1075314.938114 9969884.761770 10021651.146098 Utah geology hazards adverse-construction conditions erosion flooding Utah St George Hurricane Washington County None Although this product represents the work of professional scientists, the Utah Department of Natural Resources, Utah Geological Survey, makes no warranty, expressed or implied, regarding its suitability for a particular use, and does not guarantee accuracy or completeness of the data. The Utah Department of Natural Resources, Utah Geological Survey, shall not be liable under any circumstances for any direct, indirect, special, incidental, or consequential damages with respect to claims by users of this product. For use at 1:24,000 scale only. Data released to the Receiving Agency (RA) remains the property of the originating data source (see Source_Information) and cannot be reproduced for sale by the RA without the written consent of that data source. Redistribution of datasets unchanged as obtained from UGS and without fee is allowed. Any hardcopies utilizing these data sets shall clearly indicate their source. If the RA has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. RA specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by UGS. Tyler Knudsen Utah Geological Survey (UGS) - Cedar City Office Geologist mailing and physical address

88 E Fiddler Canyon Rd., Ste. C

Cedar City UT 84720 USA

1594 W North Temple, Suite 3110

Salt Lake City UT 84116 USA 435-865-9041 tylerknudsen@utah.gov None Unclassified None ESRI ArcCatalog 9.2.2.1350 Shapefile Feature attributes were taken from the source material. Code assignments are believed to be representative of source materials. UGS estimates the accuracy to be close to, but not completely conforming to, the 1:24,000 scale UGS standards. Dataset copied. withheld 20090730 15423600 Vector G-polygon 0 Simple Polygon FALSE 0 FALSE FALSE coordinate pair 0.000000 0.000000 survey feet State Plane Coordinate System 4303 37.216667 38.350000 -111.500000 36.666667 1640416.666667 9842500.000000 North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983 NAD_1983_StatePlane_Utah_South_FIPS_4303_Feet 0.000010 Explicit elevation coordinate included with horizontal coordinates Erosion_Hazard_Zones Feature Class 0 Shape_Area Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. FID FID Float 19 Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. 11 Class EHZ zones are independent of FEMA FIRMs 100-year flood zones, and are intended to prevent damage from erosion during flooding Float 19 11 Shape_Leng Shape_Leng String 10 class class String 10 0 0 In 1997, the City of St. George contracted with CH2MHILL consultants in association with JE Fuller Hydrology & Geomorphology, Inc. to conduct a river stability study of the Virgin and Santa Clara Rivers and Fort Pearce Wash in the vicinity of St. George (CH2MHILL, 1997). A principal result of the study was the delineation of erosion-hazard zones along the stretches of the drainages studied. An erosion-hazard zone as defined by CH2MHILL (1997) is a "land area adjoining a body of water or adjacent to or located partially or wholly within a delineated flood plain which due to soil instability, is likely to suffer flood-related erosion damage." Erosion-hazard zones are independent of FIRMS 100-year flood zones, and are intended to prevent damage from erosion during flooding, "whether or not the property is located in a FIRMS 100-year flood zone" (CH2MHILL, 1997). Erosion-hazard zones are based chiefly on a geomorphic analysis of river behavior over time, and are determined through a combination of air photo interpretation, field observations, geology and soils mapping, and consideration of the location and design of structures in active stream channels including bridges, water diversion dams, and channel stabilization structures. The City of St. George incorporated the erosion-hazard zones into their Flood Damage Prevention Ordinance in 1999 along with a requirement that structures built within the zones incorporate erosion-hazard-mitigation measures. The Flood-Hazard Map (plate 3) prepared for this study includes the boundaries of the erosion-hazard zones established for the Virgin and Santa Clara Rivers and Fort Pearce Wash (JE Fuller Hydrology & Geomorphology, Inc., 2005, 2007a, 2007b). The erosion-hazard zone boundaries for selected other areas in Washington County (JE Fuller/Hydrology & Geomorphology, Inc., 2007c) were not available in digital format. Only one small area along Sand Hollow Wash covered in the JE Fuller Hydrology & Geomorphology, Inc. (2007c) study lies within the St. George - Hurricane metropolitan area. EHZ These zones are independent of FEMA FIRMs 100-year flood zones, and are intended to prevent damage from erosion during flooding DVD-ROM 0.000 0.000 20080616 Utah Geological Survey Geologic Hazards Program GIS Analyst 1594 West North Temple Suite 3110 Salt Lake City UT 84116 USA 801-537-3386 801-538-4810 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time en http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile 20141217 16580200 FALSE 20080616 11565800 20080616 12283900 1.0 ESRI ArcCatalog 9.2.2.1350 Erosion_Hazard_Zones 1005871.524508 1075314.938114 10021651.146098 9969884.76177 1 -113.676975 -113.435129 37.14259 36.996261 1 ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset 002 withheld 0.000 Shapefile NAD_1983_StatePlane_Utah_South_FIPS_4303_Feet 0 20080616