Description: Per the USACE, "The National Inventory of Dams (NID) consists of dams meeting at least one of the following criteria; 1) where downstream flooding would likely result in loss of human life (high hazard potential) 2) where downstream flooding would likely result in disruption of access to critical facilities, damage to public and private facilities, and require difficult mitigation efforts (significant hazard potential) and 3) Dams that meet minimum height and reservoir size requirements, even though they do not pose the same level of life or economic risk as those above – these dams are typically equal to or exceed 25 feet in height and exceed 15 acre-feet in storage, or equal to or exceeding 50 acre-feet storage and exceeding 6 feet in height."The Georgia NID does not yet contain all dams in the State of Georgia that meet these criteria. Continued, routine updates to the nationwide NID and enhanced data collection efforts, focused on the most reliable data sources (primarily the many federal and state government dam regulatory programs), will help capture these dams and result in a more robust dataset over time.Data currency: This service is checked weekly for updates from its ESRI source (see https://www.arcgis.com/home/item.html?id=a4c195b7a6b74f278ff43e5d60c6915d)For more information, please visit the National Inventory of Dams: https://nid.sec.usace.army.mil/
Copyright Text: National Inventory of Dams (ESRI Federal Datasets), U.S. Army Corps of Engineers (USACE)
Description: Flood Zones (2018) are the flood insurance risk zone designation. These zones are used by the Federal Emergency Management Agency (FEMA) to designate Special Flood Hazard Areas (SFHAs) and for insurance rating purposes. See FEMA's resources page at http://www.fema.gov/library/viewRecord.do?id=2206 for more details. Map layer symbology is based on FEMA's Flood Data Symbology page at https://hazards.fema.gov/femaportal/resources/symbology.htm
Copyright Text: Federal Emergency Management Agency (FEMA), Georgia GIS Clearinghouse
Description: Floodway (2018) areas are designated by FEMA and adopted by communities to provide an area that will remain free of development to moderate increases in flood heights due to encroachment on the floodplain. See FEMA's resources page at http://www.fema.gov/library/viewRecord.do?id=2206 for more details.
Copyright Text: Federal Emergency Management Agency (FEMA), Georgia GIS Clearinghouse
Description: The land area covered by the floodwaters of the base flood is the Special Flood Hazard Area (SFHA) on NFIP maps (2018). The SFHA is the area where the NFIP's floodplain management regulations must be enforced and the area where the mandatory purchase of flood insurance applies. The SFHA includes Zones A, AO, AH, A1-30, AE, A99, AR, AR/A1-30, AR/AE, AR/AO, AR/AH, AR/A, VO, V1-30, VE, and V. See FEMA's resources page at http://www.fema.gov/library/viewRecord.do?id=2206 for more details.
Copyright Text: Federal Emergency Management Agency (FEMA), Georgia GIS Clearinghouse