When used in this chapter the following words and terms shall be interpreted as follows, unless the context clearly indicates a different meaning:
Accessory structure (see Appurtenant structure)
Alluvial fan flooding refers to flooding occurring on the surface of an alluvial fan or similar landform which originates at the apex and is characterized by high-velocity flows, active processes of erosion, sediment transport and deposition, and unpredictable flow paths.
Apex is a point on an alluvial fan or similar landform below which the flow path of the major stream that formed the fan becomes unpredictable and alluvial fan flooding can occur.
Appurtenant structure refers to a structure which is on the same parcel of property as the principal structure to be insured and the use of which is incidental to the use of the principal structure.
Area of future conditions flood hazard denotes the land area that would be inundated by the one (1)-percent (1% )-annual chance (one hundred [100] year) flood based on future conditions hydrology.
Area of shallow flooding refers to a designated AO, AH, AR/AO, AR/AH, or VO zone on a community's Flood Insurance Rate Map (FIRM) with a one percent (1%) or greater annual chance of flooding to an average depth of one (1) to three (3) feet where a clearly defined channel does not exist, where the path of flooding is unpredictable and where velocity flow may be evident. Such flooding is characterized by ponding or sheet flow.
Area of special flood hazard is the land in the floodplain within a community subject to a one percent (1%) or greater chance of flooding in any given year. The area may be designated as Zone A on the Flood Hazard Boundary Map (FHBM). After detailed rate-making has been completed in preparation for publication of the FIRM, Zone A usually is refined into Zones A, AO, AH, A1-30, AE, A99, AR, AR/A1-30, AR/AE, AR/AO, AR/AH, AR/A, VO, V1-30, VE or V.
Base flood refers to the flood having a one percent (1%) chance of being equaled or exceeded in any given year.
Basement is any area of the building having its floor subgrade (below ground level) on all sides.
Breakaway wall is a wall that is not part of the structural support of the building and is intended through its design and construction to collapse under specific lateral loading forces, without causing damage to the elevated portion of the building or supporting foundation system.
Critical facility is a facility for which even a slight chance of flooding might be too great. Critical facilities include, but are not limited to, schools, nursing homes, hospitals, police, fire and emergency response installations, and installations which produce, use or store hazardous materials or hazardous waste.
Critical feature refers to an integral and readily identifiable part of a flood protection system, without which the flood protection provided by the entire system would be compromised.
Development denotes any man-made change to improved and unimproved real estate, including but not limited to buildings or other structures, mining, dredging, filling, grading, paving, excavation or drilling operations or storage of equipment or materials.
Elevated building refers to, for insurance purposes, a nonbasement building, which has its lowest elevated floor, raised above ground level by foundation walls, shear walls, posts, piers, pilings, or columns.
Existing construction refers to, for the purposes of determining rates, structures for which the "start of construction" commenced before the effective date of the FIRM or before January 1, 1975, for FIRMs effective before that date. Existing construction may also be referred to as existing structures.
Existing manufactured home park or subdivision is a manufactured home park or subdivision for which the construction of facilities for servicing the lots on which the manufactured homes are to be affixed (including, at a minimum, the installation of utilities, the construction of streets, and either final site grading or the pouring of concrete pads) is completed before the effective date of the floodplain management regulations adopted by a community.
Expansion to an existing manufactured home park or subdivision refers to the preparation of additional sites by the construction of facilities for servicing the lots on which the manufactured homes are to be affixed (including the installation of utilities, the construction of streets, and either final site grading or the pouring of concrete pads).
Flood or flooding is a general and temporary condition of partial or complete inundation of normally dry land areas from:
(1) The overflow of inland or tidal waters; or
(2) The unusual and rapid accumulation or runoff of surface waters from any source.
Flood elevation study denotes an examination, evaluation and determination of flood hazards and, if appropriate, corresponding water surface elevations, or an examination, evaluation and determination of mudslide (mudflow) and/or flood-related erosion hazards.
Flood Hazard Boundary Map (FHBM) is an official map of a community, issued by the Administrator, where the boundaries of the flood, mudslide (mudflow)-related erosion areas having special hazards have been designated as Zones A, M, and/or E.
Flood Insurance Rate Map (FIRM) is an official map of a community, on which the Federal Emergency Management Agency (FEMA) has delineated both the special flood hazard areas and the risk premium zones applicable to the community.
Flood Insurance Study (FIS) (see Flood Elevation Study)
Floodplain or flood-prone area refers to any land area susceptible to being inundated by water from any source (see definition of flooding).
Floodplain management is the operation of an overall program of corrective and preventive measures for reducing flood damage, including but not limited to emergency preparedness plans, flood control works and floodplain management regulations.
Floodplain management regulations are zoning ordinances, subdivision regulations, building codes, health regulations, special-purpose ordinances (such as a floodplain ordinance, grading ordinance and/or erosion control ordinance) and other applications of police power. The term describes such state or local regulations, in any combination thereof, which provide standards for the purpose of flood damage prevention and reduction.
Flood protection system refers to those physical structural works for which funds have been authorized, appropriated, and expended and which have been constructed specifically to modify flooding in order to reduce the extent of the area within a community subject to a “special flood hazard” and the extent of the depths of associated flooding. Such a system typically includes hurricane tidal barriers, dams, reservoirs, levees or dikes. These specialized flood-modifying works are those constructed in conformance with sound engineering standards.
Floodproofing denotes any combination of structural and nonstructural additions, changes, or adjustments to structures which reduce or eliminate flood damage to real estate or improved real property, water and sanitary facilities, structures and their contents.
Floodway (see Regulatory floodway)
Functionally dependent use is a use which cannot perform its intended purpose unless it is located or carried out in close proximity to water. The term includes only docking facilities, port facilities that are necessary for the loading and unloading of cargo or passengers, and shipbuilding and ship repair facilities, but does not include long-term storage or related manufacturing facilities.
Highest adjacent grade refers to the highest natural elevation of the ground surface prior to construction next to the proposed walls of a structure.
Historic structure refers to any structure that is:
(1) Listed individually in the National Register of Historic Places (a listing maintained by the U.S. Department of the Interior) or preliminarily determined by the Secretary of the Interior as meeting the requirements for individual listing on the National Register;
(2) Certified or preliminarily determined by the Secretary of the Interior as contributing to the historical significance of a registered historic district or a district preliminarily determined by the Secretary to qualify as a registered historic district;
(3) Individually listed on a state inventory of historic places in states with historic preservation programs which have been approved by the Secretary of Interior; or
(4) Individually listed on a local inventory or historic places in communities with historic preservation programs that have been certified either:
(a) By an approved state program as determined by the Secretary of the Interior; or
(b) Directly by the Secretary of the Interior in states without approved programs.
Levee refers to a man-made structure, usually an earthen embankment, designed and constructed in accordance with sound engineering practices to contain, control, or divert the flow of water so as to provide protection from temporary flooding.
Levee system is a flood protection system which consists of a levee, or levees, and associated structures, such as closure and drainage devices, which are constructed and operated in accordance with sound engineering practices.
Lowest floor denotes the lowest floor of the lowest enclosed area (including basement). An unfinished or flood-resistant enclosure, usable solely for parking or vehicles, building access or storage in an area other than a basement area is not considered a building's lowest floor; provided that such enclosure is not built so as to render the structure in violation of the applicable non-elevation design requirement of § 60.3 of the National Flood Insurance Program regulations.
Manufactured home is a structure transportable in one or more sections, which is built on a permanent chassis and is designed for use with or without a permanent foundation when connected to the required utilities. The term manufactured home does not include a “recreational vehicle.”
Manufactured home park or subdivision refers to a parcel (or contiguous parcels) of land divided into two (2) or more manufactured home lots for rent or sale.
Mean sea level refers to, for purposes of the National Flood Insurance Program, the National Geodetic Vertical Datum (NGVD) of 1929 or other datum, to which base flood elevations shown on a community's Flood Insurance Rate Map are referenced.
New construction refers to, for the purpose of determining insurance rates, structures for which the "start of construction" commenced on or after the effective date of an initial FIRM or after December 31, 1974, whichever is later, and includes any subsequent improvements to such structures. For floodplain management purposes, new construction denotes structures for which the "start of construction" commenced on or after the effective date of a floodplain management regulation adopted by a community and includes any subsequent improvements to such structures.
New manufactured home park or subdivision is a manufactured home park or subdivision for which the construction of facilities for servicing the lots on which the manufactured homes are to be affixed (including, at a minimum, the installation of utilities, the construction of streets, and either final site grading or the pouring of concrete pads) is completed on or after the effective date of floodplain management regulations adopted by a community.
Recreational vehicle is a vehicle that is:
(1) Built on a single chassis;
(2) Four hundred (400) square feet or less when measured at the largest horizontal projections;
(3) Designed to be self-propelled or permanently towable by a light-duty truck; and
(4) Designed primarily not for use as a permanent dwelling but as temporary living quarters for recreational, camping, travel, or seasonal use.
Riverine denotes anything relating to, formed by, or resembling a river (including tributaries), stream, brook, and the like.
Special flood hazard area (see Area of special flood hazard)
Start of construction (for other than new construction or substantial improvements under the Coastal Barrier Resources Act [Pub. L. 97-348]), includes substantial improvement and refers to the date the building permit was issued, provided the actual start of construction, repair, reconstruction, rehabilitation, addition placement, or other improvement was within one hundred eighty (180) days of the permit date.
(1) The actual start is denoted by:
(a) The first placement of permanent construction of a structure on a site, such as the pouring of slab or footings, the installation of piles, the construction of columns, or any work beyond the stage of excavation; or
(b) The placement of a manufactured home on a foundation.
(2) Permanent construction does not include land preparation, such as clearing, grading and filling; nor does it include the installation of streets and/or walkways; nor does it include excavation for basement, footings, piers or foundations or the erection of temporary forms; nor does it include the installation on the property of accessory buildings, such as garages or sheds not occupied as dwelling units or not part of the main structure.
(3) For a substantial improvement, the actual start of construction refers to the first alteration of any wall, ceiling, floor, or other structural part of a building, whether or not that alteration affects the external dimensions of the building.
Structure is, for floodplain management purposes, a walled and roofed building, including a gas or liquid storage tank, that is principally above ground, as well as a manufactured home.
Substantial damage refers to damage of any origin sustained by a structure whereby the cost of restoring the structure to its before-damaged condition would equal or exceed forty percent (40%) of the market value of the structure before the damage occurred.
Substantial improvement denotes any reconstruction, rehabilitation, addition, or other improvement of a structure, the cost of which equals or exceeds forty percent (40%) of the market value of the structure before "start of construction" of the improvement. This term includes structures, which have incurred "substantial damage," regardless of the actual repair work performed. The term does not, however, include either:
(1) Any project for improvement of a structure to correct existing violations of state or local health, sanitary, or safety code specifications which have been identified by the local code enforcement official and which are the minimum necessary to assure safe living conditions ; or
(2) Any alteration of a "historic structure," provided that the alteration will not preclude the structure's continued designation as a "historic structure."
Variance is a grant of relief by a community from the terms of a floodplain management regulation. (For full requirements see § 60.6 of the National Flood Insurance Program regulations.)
Violation refers to the failure of a structure or other development to be fully compliant with the community's floodplain management regulations. A structure or other development without the elevation certificate, other certifications, or other evidence of compliance required in §§ 60.3(b)(5), (c)(4), (c)(10), (d)(3), (e)(2), (e)(4) or (e)(5) of the National Flood Insurance Program regulations is presumed to be in violation until such time as that documentation is provided.
Water surface elevation is the height, in relation to the National Geodetic Vertical Datum (NGVD) of 1929 (or other datum, where specified), of floods of various magnitudes and frequencies in the floodplains of coastal or riverine areas.
(Ord. 3-06-07-1, passed 3-6-07)