Kara M. Watson Stephen J. Cauller 201711 Shapefiles and raster file Reston, VA U.S. Geological Survey https://doi.org/10.5066/F76T0K4K Samuel H. Austin Kara M. Watson R. Russell Lotspeich Stephen J. Cauller Jeremy S. White Shaun M. Wicklein 201711 Documentation report Reston, VA U.S. Geological Survey https://doi.org/10.3133/ofr20171140 The mapped area boundary, flood inundation extents, and depth rasters were created to provide an estimated extent of flood inundation along the New River within the community of Hinton, West Virginia. These geospatial data include the following items: 1. newriver_bnd; shapefile containing the polygon showing the mapped area boundary for the New River flood maps, 2. newriver_hwm; shapefile containing high-water mark points, 3. polygon_newriver_hwm; shapefile containing mapped extent of flood inundation, derived from the water-surface elevation surveyed at high-water marks, 4. depth_hwm; raster file for the flood depths derived from the water-surface elevation surveyed at high-water marks, 5. polygon_newriver_dem; shapefile containing mapped extent of flood inundation, derived from the height above ground recorded at high-water marks and the digital elevation model (DEM) raster, 6. depth_dem; raster file for the flood depths derived from the height above ground recorded at high-water marks and the digital elevation model raster. The upstream and downstream mapped area extent is limited to the upstream-most and downstream-most high-water mark locations. In areas of uncertainty of flood extent, the mapped area boundary is lined up with the flood inundation polygon extent. The mapped area boundary polygon was used to extract the final flood inundation polygon and depth raster from the water-surface elevation raster file. Depth raster files were created using the "Topo to Raster" tool in ArcMap (ESRI, 2012). For this study two sets of inundation layers were generated for each reach. One raster file showing flood depths, "depth_hwm", was created by using high-water mark water-surface elevation values on the land surface and a digital elevation model. However, differences in elevation between the surveyed water-surface elevation values at HWM’s and the land-surface elevation from the digital elevation model data provided uncertainty in the inundation extent of the generated layers. Often times elevation differences of +/- 20 feet were noticed between the surveyed elevation from a HWM on the land surface and the digital elevation model land-surface elevation. Due to these elevation differences, we incorporated a second method of interpolating the water-surface layer. The recorded height above ground value from the surveyed HWM was added to the digital elevation model land-surface elevation at that point. This created a new water-surface elevation value to be used with the “Topo to Raster” interpolation method to create a second depth raster, "depth_dem". Both sets of inundation layers are provided. The mapped area boundary, flood inundation extents, and depth rasters were created to support the development of flood inundation maps for the Federal Emergency Management Agency's (FEMA) response and recovery operations following the June, 2016 flood event in the community of Hinton, West Virginia. 20160623 20160624 ground condition Complete None planned -80.900387 -80.873465 37.689677 37.640795 ISO 19115 Topic Categories boundary extent study area high-water marks flooded area flood geospatial analysis river/stream flood inundation maps USGS Metadata Identifier USGS:59c94e41e4b017cf313f0ff7 Common geographic areas West Virginia Hinton New River June 23-24, 2016 none none Kara M. Watson U.S. Geological Survey, New Jersey Water Science Center mailing and physical

3450 Princeton Pike, Suite 110

Lawrenceville NJ 08648 United States 609-414-6115 kmwatson@usgs.gov During large, short-term events, the USGS collects additional data (high-water marks, additional sensor deployments) to aid in documenting high-water events. This short-term event data is uploaded to the USGS Short-Term Network (STN) for long-term archival. The USGS Flood Event Viewer provides convenient, map-based and data table access to storm-surge and high-water mark event-based data collected within the USGS STN. Attributes for the high-water marks were input from surveyed values obtained at the recorded high-water mark. Surveys were conducted and recorded by USGS staff. High-water mark attributes went through quality assurance check before input into USGS Short-Term Network (STN). U.S. Geological Survey, 2017, Short-Term Network Data Portal, accessed on April 24, 2017, at http://water.usgs.gov/floods/FEV/ No formal logical accuracy tests were conducted Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Aerial photography and video were used as an accuracy check for flood inundation extents. Vertical accuracy checks were conducted with GPS and survey equipment for recording high-water mark locations and elevations. Shapefiles and raster files were compiled together by stream reach for data release. 201709 Vector Universal Transverse Mercator NAD_1983_2011_UTM_Zone_17N row and column 1.0 1.0 SURVEY_FEET North American Vertical Datum of 1988 Attribute values The entity and attribute information provided here describes the tabular data associated with the data set. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the data set. The entity and attribute information was generated by the individual and/or agency identified as the originator of the data set. Please review the individual metadata records associated with each dataset for additional details and information. ScienceBase U.S. Geological Survey - ScienceBase mailing and physical

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Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Inundated areas shown should not be used for navigation, regulatory, permitting, or other legal purposes. The U.S. Geological Survey provides these maps "as-is" for a quick reference, emergency planning tool but assumes no legal liability or responsibility resulting from the use of this information. These maps are only depicting the June 2016 event and may not be representative of other flooding conditions. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 20200827 Kara M. Watson U.S. Geological Survey, New Jersey Water Science Center Hydrologist mailing and physical

3450 Princeton Pike, Suite 110

Lawrenceville NJ 08648 United States 609-414-6115 kmwatson@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998