SFHAs are labeled as Zone A, Zone AO, Zone AH, Zones A1-A30, Zone AE, Zone A99, Zone AR, Zone AR/AE, Zone AR/AO, Zone AR/A1-A30, Zone AR/A, Zone V, Zone VE, and Zones V1-V30. The 1-percent annual chance flood is also referred to as the base flood or 100-year flood. SFHA are defined as the area that will be inundated by the flood event having a 1-percent chance of being equaled or exceeded in any given year. Internal TFHC designation.Īn area inundated by flooding, for which BFEs or average depths have not been determined.Flood hazard areas identified on the Flood Insurance Rate Map are identified as a Special Flood Hazard Area (SFHA).
Internal TFHC designation.Īn area that is located within a community or county that is not mapped on any published FIRM (Usually a community not participating in NFIP). An arbitrary channel width of 3 meters is shown.Īreas subject to inundation by the 1-percent-annual-chance flood event determined by detailed methods., for which base flood elavations have been established.Ĭoastal area inundated by 100-year flooding with velocity hazard (wave action) no BFEs have been determined.Īn area of Data Discrepancy or an Unclaimed Area. This is an area inundated by 500-year flooding an area inundated by 100-year flooding with average depths of less than 1 foot or with drainage areas less than 1 square mileĪ body of open water, such as a pond, lake ocean, etc., located within a community’s jurisdictional limits, that has no defined flood hazard.Īn area inundated by 100-year flooding with velocity hazard (wave action) no BFEs have been determined.Īn area inundated by 100-year flooding with velocity hazard (wave action) BFEs have been determined.ĥ00-year Flood Discharge Contained in ChannelĪn area where the 500-year flooding is contained within the channel banks and the channel is too narrow to show to scale. BFEs are not shown in this area, although they may be reflected on the corresponding profileĪn area designated as outside a “Special Flood Hazard Area” (or SFHA) on a FIRM. An arbitrary channel width of 3 meters is shown.
This is an area to be protected from the 100-year flood by a Federal flood protection system under construction.Īn area inundated by 100-year flooding, for which BFEs have been determined.Īn area inundated by 100-year flooding (usually an area of ponding), for which BFEs have been determined flood depths range from 1 to 3 feet.Īn area that is located within a community or county that is not mapped on any published FIRM.Īn area inundated by 100-year flooding (usually sheet flow on sloping terrain), for which average depths have been determined flood depths range from 1 to 3 feet.Īn area inundated by flooding, for which BFEs or average depths have been determined.Īn area inundated by 500-year flooding an area inundated by 100-year flooding with average depths of less than 1 foot or with drainage areas less than 1 square mile or an area protected by levees from 100-year flooding.Īn area that is determined to be outside the 100- and 500-year floodplains.Īn area of undetermined but possible flood hazards.Īn area that includes the channel of a river or other watercourse (Usually adjacent to Zone AE).Īn area where the floodway is contained within the channel banks and the channel is too narrow to show to scale. An arbitrary channel width of 3 meters is shown.Īn area inundated by 100 year flooding, for which no BFEs have been established.Īn area inundated by 100-year flooding, for which no BFEs have been determined. No distinctions are made between the different flood hazard zones that may be included within the SFHA.ġ00-year Flood Discharge Contained in ChannelĪn area where the 100-year flooding is contained within the channel banks and the channel is too narrow to show to scale. This is an area inundated by 100-year flooding for which BFEs or velocity may have been determined.
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