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A zone definition

A zone means portions of the SFHA in which the principal source of flooding is runoff from rainfall, snowmelt, or a combination of both. In A zones, floodwaters may move slowly or rapidly, but waves are usually not a significant threat to buildings. These areas are labeled as Zone A, Zone AE, Zones A1-A30, Zone AO, Zone AH, Zone AR and Zone A99 on a FIRM. The definitions are presented below:
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A zone means an area shown on the Official Floodplain Zoning Map which would be inundated by the regional flood. An A zone may be numbered or unnumbered.
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A zone means portions of the SFHA in which the principal source of flooding is runoff from rainfall, snowmelt, or a combination of both. In A zones, floodwaters may move slowly or rapidly, but waves are usually not a significant threat to buildings.
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Examples of A zone in a sentence

  • A zone can map exactly to a single domain, but could also include only part of a domain, the rest of which could be delegated to other name servers.

  • A zone means portions of the SFHA in which the principal source of flooding is runoff from rainfall, snowmelt, or a combination of both.

  • Identify the presence and nature (e.g., zone A, zone AE, zone AE with floodway) of any Federal Emergency Management Agency (FEMA) mapped floodplains.

  • A zone consists of those contigu- ous parts of the domain tree for which a name server has complete information and over which it has authority.

  • A zone of soil that become saturated for periods long enough to undergo reducing conditions during periods of climatic stress due to an underlying restrictive layer.


More Definitions of A zone

A zone means the shallow groundwater layer that underlies the Facility and adjacent
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A zone means those areas inundated by theone percent annual chance flood, commonly called the 100-year flood or (base flood).
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A zone means the areas of special flood hazard where detailed engineering studies are not available for floodplain management. On-site inspections and/or flood studies may be necessary in order to determine from the best available information, the elevation of the regulatory flood in such
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A zone means "Special flood hazard area," as defined herein. “Accessory structure” means a structure that is either:
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A zone means portions of the special flood hazard area (SFHA) in which the principle source of flooding is runoff from rainfall, snowmelt, or a combination of both. In A zones, floodwaters may move slowly or rapidly, but waves are usually not a significant threat to structures. Areas of 100-year flood, base flood elevations and flood hazard factors are not determined.”
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A zone means an area shown on the Official Floodplain Zoning Map which would be
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A zone means portions of the SFHA in which the principal source of flooding is runoff from rainfall, snowmelt, or a combination of both. In A zones, floodwaters may move slowly or rapidly, but waves are usually not a significant threat to buildings. These areas are labeled as Zone A, Zone AE, Zones A1-A30, Zone AO, Zone AH, Zone AR and Zone A99 on a FIRM. The definitions are presented below: Zone A: Areas subject to inundation by the one-percent annual chance flood event.Because detailed hydraulic analyses have not been performed, no base flood elevation or depths are shown. Zone AE and A1-A30: Areas subject to inundation by the one-percent annual chance flood event determined by detailed methods. Base flood elevations are shown within these zones. (Zone AE is on new and revised maps in place of Zones A1-A30). Zone AO: Areas subject to inundation by one-percent annual chance shallow flooding (usually sheet flow on sloping terrain) where average depths are between one and three feet.Average flood depths derived from detailed hydraulic analyses are shown within this zone. Zone AH: Areas subject to inundation by one-percent annual chance shallow flooding (usually areas of ponding) where average depths are between one and three feet. Average flood depths derived from detailed hydraulic analyses are shown within this zone. Zone AR: Areas that result from the decertification of a previously accredited flood protection system that is determined to be in the process of being restored to provide base flood protection. Zone A99: Areas subject to inundation by the one-percent annual chance flood event, but which will ultimately be protected upon completion of an under- construction Federal flood protection system. These are areas of special flood hazard where enough progress has been made on the construction of a protection system, such as dikes, dams, and levees, to consider it complete for insurance rating purposes. Zone A99 may only be used when the flood protection system has reached specified statutory progress toward completion. No base flood elevations or depths are shown.
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