Description: This polygon dataset, derived from the FEMA National Flood Hazard Layer (source: http://www.floodmaps.fema.gov/NFHL/status.shtml, interactive FEMA web map: http://fema.maps.arcgis.com/home/webmap/viewer.html?webmap=cbe088e7c8704464aa0fc34eb99e7f30), shows the extent of 100 year flood boundaries for locations throughout the state of Nevada, excluding Esmeralda County. This layer combines National Flood Hazard Layer (NFHL) data for floodways (defined here: http://www.fema.gov/floodway) and flood zones (defined here: http://www.fema.gov/flood-zones). The flood zones in this layer are referred to by FEMA as having a 1% annual chance of being equaled or exceeded in a given year, and identified on the Flood Insurance Rate Map (FIRM) as a Special Flood Hazard Area (SFHA). This is also known as the base flood or 100-year flood as referred to in this layer. These zones are labeled in the NFHL as Zone A, AO, AH, A1-A30, AE, A99, AR, AR/AE, AR/AO, AR/A1-A30, AR/A, V, VE, and V1-V30.
Description: Moderate flood hazard areas are also shown in this layer, and are the areas between the limits of the base flood (100 year) and the 0.2-percent-annual-chance (or 500-year) flood. This group layer also includes areas of reduced flood risk due to levee.
Description: This polygon dataset, derived from the FEMA National Flood Hazard Layer (source: http://www.floodmaps.fema.gov/NFHL/status.shtml, interactive FEMA web map: http://fema.maps.arcgis.com/home/webmap/viewer.html?webmap=cbe088e7c8704464aa0fc34eb99e7f30), shows the extent of 500 year flood boundaries for locations throughout the state of Nevada, excluding Esmeralda County. This layer shows 500 year flood zones (defined here: http://www.fema.gov/flood-zones). The flood zones in this layer are referred to by FEMA as having a 0.2% annual chance of being equaled or exceeded in a given year, and identified on the Flood Insurance Rate Map (FIRM) as a Special Flood Hazard Area (SFHA). This is also known as the base flood or 500-year flood as referred to in this layer. These zones are labeled in the NFHL as Zone B and X (shown in orange).
Description: This polygon dataset, derived from the FEMA National Flood Hazard Layer (source: http://www.floodmaps.fema.gov/NFHL/status.shtml" target="_blank, interactive FEMA web map: http://fema.maps.arcgis.com/home/webmap/viewer.html?webmap=cbe088e7c8704464aa0fc34eb99e7f30), shows the areas with reduced flood risk due to levee. These areas are found in Carson City, Clark, and Washoe Counties and represent areas protected by levee from 100-year flood. These areas are shown in red on this map.
Description: Description: This polygon dataset, derived from the FEMA National Flood Hazard Layer (source: http://www.floodmaps.fema.gov/NFHL/status.shtml, interactive FEMA web map: http://fema.maps.arcgis.com/home/webmap/viewer.html?webmap=cbe088e7c8704464aa0fc34eb99e7f30), shows areas where there are possible, but undetermined flood hazards. These zones may also be used when a community incorporated a portion of another community where no flood maps have been prepared. For more information on Zone D, or areas of undetermined flood risk, please visit: https://www.fema.gov/media-library-data/20130726-1806-25045-7880/zone_d_fact_sheet.pdf.