8/8/2023 0 Comments Definition of ae flood zone![]() ![]() Mandatory flood insurance purchase requirements do not apply, but coverage is available. In areas designated as Zone D, no analysis of flood hazards has been conducted. Mandatory flood insurance purchase requirements apply.ĭ - Zone D designation is used for areas where there are possible but undetermined flood hazards. No Base Flood Elevations or depths are shown within this zone. Mandatory purchase requirements for flood insurance will apply in Zone AR, but the rate will not exceed the rate for an unnumbered Zone A if the structure is built in compliance with Zone AR floodplain management regulations.Ī99 - Zone A99 is the flood insurance rate zone that corresponds to areas within the 1-percent annual chance floodplain that will be protected by a Federal flood protection system where construction has reached specified statutory milestones. FEMA will consider using the Zone AR designation for a community if the flood protection system has been deemed restorable by a Federal agency in consultation with a local project sponsor a minimum level of flood protection is still provided to the community by the system and restoration of the flood protection system is scheduled to begin within a designated time period and in accordance with a progress plan negotiated between the community and FEMA. Mandatory flood insurance purchase requirements apply.ĪR - Zone AR is the flood insurance rate zone used to depict areas protected from flood hazards by flood control structures, such as a levee, that are being restored. In addition, alluvial fan flood hazards are shown as Zone AO on the Flood Insurance Rate Map. ![]() Average flood depths derived from the detailed hydraulic analyses are shown within this zone. Mandatory flood insurance purchase requirements apply.ĪO - Zone AO is the flood insurance rate zone that corresponds to the areas of 1-percent shallow flooding (usually sheet flow on sloping terrain) where average depths are between 1 and 3 feet. The Base Flood Elevations derived from the detailed hydraulic analyses are shown at selected intervals within this zone. Mandatory flood insurance purchase requirements apply.ĪH - Zone AH is the flood insurance rate zone that corresponds to the areas of 1-percent annual chance shallow flooding with a constant water-surface elevation (usually areas of ponding) where average depths are between 1 and 3 feet. In most instances, Base Flood Elevations derived from the detailed hydraulic analyses are shown at selected intervals within this zone. Mandatory flood insurance purchase requirements apply.ĪE and A1-A30 - Zones AE and A1-A30 are the flood insurance rate zones that correspond to the 1-percent annual chance floodplains that are determined in the Flood Insurance Study by detailed methods of analysis. Because detailed hydraulic analyses are not performed for such areas, no Base Flood Elevations or depths are shown within this zone. These flood zones are explained below and reflects the severity or type of flooding in the area.Ī - Zone A is the flood insurance rate zone that corresponds to the 1-percent annual chance floodplains that are determined in the Flood Insurance Study by approximate methods of analysis. Areas of Special Flood Hazard include Zones A, AE, AH, AO, AR, A99, D, V, VE, and X. The Special Flood Hazard area is the area subject to flooding by the 1% annual chance flood. The 1% annual chance (base flood) is the flood that has a 1% chance of being equaled or exceeded in any year. ![]() The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. ![]()
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