Shallow Bedrock Adverse-Construction Condition St. George - Hurricane Metropolitan Area, Washington County, Utah

State of Utah - Utah Geological Survey (UGS) 2008 Shallow Bedrock Adverse-Construction Condition St. George - Hurricane Metropolitan Area, Washington County, Utah None vector digital data UGS Special Study SS 127 Salt Lake City, UT Utah Geological Survey Digital data at 1:24,000 William R. Lund, Tyler R. Knudsen, Garrett S. Vice, and Lucas Shaw; Utah Geological Survey 2008 GEOLOGIC HAZARDS AND ADVERSE CONSTRUCTION CONDITIONS ST. GEORGE - HURRICANE METROPOLITAN AREA, WASHINGTON COUNTY, UTAH UGS Special Study SS 127 Salt Lake City, UT Utah Geological Survey Shallow_Bedrock This dataset represents shallow bedrock adverse-construction condition 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 -113.721388 -113.241066 37.303318 36.990546 258764.955600 300580.624900 4097055.266600 4130691.000000 Utah geology hazards adverse-construction conditions shallow bedrock 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 GIS Data: Garrett Vice, Tyler Knudsen, Lucas Shaw (UGS) Project Manager: Gary Christenson, (UGS (Ret.)) Review: Utah Geological Survey None Unclassified None ESRI ArcCatalog 9.2.2.1350 File Geodatabase Feature Class 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. Vector Simple FALSE 0 TRUE FALSE coordinate pair 0.000100 0.000100 meters North American Datum of 1927 Clarke 1866 6378206.400000 294.978698 GCS_North_American_1927 NAD_1927_UTM_Zone_12N 0.000010 Explicit elevation coordinate included with horizontal coordinates ghShallowBedrock Feature Class 0 OBJECTID OBJECTID OID 4 10 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. Shape Geometry 8 0 0 Shape_Leng Shape_Leng Double 8 38 8 SBPHazardU SBPHazardU String 50 0 0 Location Location String 254 0 0 Publicatio Publicatio String 50 0 0 Potential Potential String 50 0 0 SBPHazardL SBPHazardL String 50 0 0 Shape.STArea() Shape.STArea() Double 0 0 0 Shape.STLength() Shape.STLength() Double 0 0 0 Shallow bedrock exists throughout most of southwestern Utah, posing potential foundation and utility construction and wastewater disposal challenges. The principal problem associated with bedrock is difficulty of excavation, particularly in highly resistant, unweathered units. Shallow bedrock is considered an adverse construction condition and not a geologic hazard. We grouped shallow bedrock on the Shallow-Bedrock-Susceptibility Map (plate 10) into three categories based upon degree of induration and depth of burial. The bedrock categories are as follows: BRH Hard: Areas where generally hard and resistant bedrock crops out at the ground surface. These bedrock units typically require blasting to excavate. BRS Soft: Areas where less resistant bedrock crops out at the ground surface. Even when fresh, these bedrock units typically can be excavated without blasting, although blasting may be required locally. Some rock units may contain expansive clay minerals and may be deeply weathered. BRB Buried: Areas where depth to bedrock is generally < 10 feet beneath soil cover. In most areas the identity and degree of weathering of the underlying bedrock is unknown. However, many basalt flows in the study area, which consist of very hard and durable rock, are covered with a thin veneer of soil and fall into this category. DVD-ROM 0.000 20080613 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 {A1DDB575-7BDB-4210-AE7C-D9D9877F098C} 20080516 15033400 FALSE 20250908 11441200 20250908 11441200 ghShallowBedrock 002 0.000 Projected GCS_North_American_1927 Linear Unit: Meter (1.000000) NAD_1927_UTM_Zone_12N <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.5.0'><WKT>PROJCS["NAD_1927_UTM_Zone_12N",GEOGCS["GCS_North_American_1927",DATUM["D_North_American_1927",SPHEROID["Clarke_1866",6378206.4,294.9786982]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-111.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",26712]]</WKT><XOrigin>-5121000</XOrigin><YOrigin>-9998000</YOrigin><XYScale>10000</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>26712</WKID><LatestWKID>26712</LatestWKID></ProjectedCoordinateSystem> Esri ArcGIS 13.5.0.57366 ghShallowBedrock 258764.9556 300580.6249 4130691 4097055.2666 1 -113.721388 -113.241066 37.303318 36.990546 1 ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset 002 withheld Local Area Network File Geodatabase Feature Class Enterprise Geodatabase Feature Class 0.000 NAD_1927_UTM_Zone_12N EPSG 7.2(3.0.1) 0 20250908