Zone AO definition

Zone AO means certain areas subject to one percent (1%) chance flooding in which base flood elevations range from one to three feet (1’ – 3’) above the "highest adjacent grade"; a clearly defined channel does not exist; the path of flooding is unpredictable and indeterminate; and velocity flow may be evident. If there is no depth number on the Flood Insurance Rate Map (FIRM) for Zone AO, the base flood elevation shall be two feet (2’) above the "highest adjacent grade." Where the Floodplain Administrator has knowledge that the one percent (1%) chance base flood elevation will be greater than two feet (2’) above the "highest adjacent grade", the Floodplain Administrator shall use that known one percent (1%) chance flood elevation in applying the provisions thereof. All the terms used in this Chapter and not defined in this Chapter shall be as defined in other Sections of this Title.
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Zone AO means certain areas subject to one hundred-year (100- year) flooding in which base flood elevations range from one to three feet (1 – 3’) above the "highest adjacent grade"; a clearly defined channel does not exist; the path of flooding is unpredictable and indeterminate; and velocity flow may be evident. If there is no depth number on the Flood Insurance Rate Map (FIRM) for Zone AO, the base flood elevation shall be two feet (2’) above the "highest adjacent grade." Where the Floodplain Administrator has knowledge that the one hundred-year (100-year) base flood elevation will be greater than two feet (2’) above the "highest adjacent grade", the Floodplain Administrator shall use that known one hundred-year (100-year) flood elevation in applying the provisions thereof. All the terms used in this Chapter and not defined in this Chapter shall be as defined in other Sections of this Title.
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Zone AO means certain areas subject to one percent chance flooding in which base flood elevations range from one to three feet above the "highest adjacent grade"; a clearly defined channel does not
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Examples of Zone AO in a sentence

  • This requirement does not apply in isolated flood hazard areas not connected to a riverine flood hazard area or in flood hazard areas identified as Zone AO or Zone AH.

  • In areas designated as Zone AO, the design flood elevation shall be the elevation of the highest existing grade of the building’s perimeter plus the depth number (in feet) specified on the flood hazard map.

  • For elevated structures in Zone A and Zone AO areas without a base flood elevation, the elevation certificate may be completed by the property owner or owner’s representative.

  • In Zone AO areas with no elevations specified, the structure shall have the lowest floor, including basement, elevated at least two feet above the highest adjacent natural grade.

  • In Zone AO areas, the base flood elevation is the natural grade elevation plus the depth number (from 1 to 3 feet).

  • In areas designated as Zone AO where the depth number is not specified on the map, the depth number shall be taken as being equal to 2 feet.

  • AO Zones – For Zone AO areas on the municipality’s FIRM (or on preliminary flood elevation guidance from FEMA), the Local Design Flood Elevation is determined from the FIRM panel as the highest adjacent grade plus the depth number specified plus one foot of freeboard.

  • In Zone AO, if no flood depth is specified, the lowest floor, including basement, shall be elevated no less than two (2) feet above the highest adjacent grade.

  • These areas are labeled as Zone A, Zone AE, Zones A1-A30, Zone AO, Zone AH, Zone AR and Zone A99 on a FIRM.

  • Have the lowest floor, including basement, elevated to or above either the base flood elevation or in Zone AO the flood depth specified on the Flood Insurance Rate Map, above the highest adjacent grade.


More Definitions of Zone AO

Zone AO means area of special flood hazards having shallow water depths and/or unpredictable flow paths between one (1) and three (3) feet. (Velocity flow may be evident; such flooding is characterized by ponding or sheet flow).
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Related to Zone AO

  • Floodplain or flood-prone area means any land area susceptible to being inundated by water from any source (see definition of “flood”).

  • Zone means a transit operations finance zone established under this section.

  • Septage means the liquid and solid material pumped from a septic tank, cesspool, or similar domestic sewage treatment system, or from a holding tank, when the system is cleaned or maintained.

  • Coastal zone means the area comprising coastal public property, the coastal protection zone, coastal access land, coastal protected areas, the seashore and coastal waters, and includes any aspect of the environment on, in, under and above such area;

  • Excavation zone means the volume containing the tank system and backfill material bounded by the ground surface, walls, and floor of the pit and trenches into which the UST system is placed at the time of installation.

  • Buffer Zone means an area designated to be left along roads or other features in which there will be no cutting.

  • Stormwater management measure means any practice, technology, process, program, or other method intended to control or reduce stormwater runoff and associated pollutants, or to induce or control the infiltration or groundwater recharge of stormwater or to eliminate illicit or illegal non-stormwater discharges into stormwater conveyances.

  • Natural area means an area of the rural or non-urban environment which is in an unspoilt natural state or is of high scenic value, and includes, but is not limited to, national parks, game reserves, nature reserves, marine reserves, wilderness areas, areas of extensive agriculture and scenic areas;

  • Area of special flood hazard means the land in the floodplain within a community subject to a one percent or greater chance of flooding in any given year.

  • rural areas means any area within the county located outside the

  • Non-transient non-community water system means a public water system that is not a community water system and that regularly serves at least 25 of the same persons over 6 months per year.

  • Stormwater management planning area means the geographic area for which a stormwater management planning agency is authorized to prepare stormwater management plans, or a specific portion of that area identified in a stormwater management plan prepared by that agency.

  • Contiguous zone means the entire zone established by the United States under Article 24 of the Convention on the Territorial Sea and the Contiguous Zone (37 FR 11906 June 15, 1972).

  • South Caucasus/Central and South Asian (SC/CASA) state means Armenia, Azerbaijan, Georgia, Kazakhstan, Kyrgyzstan, Pakistan, Tajikistan, Turkmenistan, or Uzbekistan.