For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
ACCESSORY STRUCTURE. A subordinate structure to the principal structure and, for the purpose of this section, shall conform to the following.
(1) ACCESSORY STRUCTURES shall only be used for parking of vehicles and storage.
(2) ACCESSORY STRUCTURES shall be designed to have low flood damage potential.
(3) ACCESSORY STRUCTURES shall be constructed and placed on the building site so as to offer the minimum resistance to the flow of flood waters.
(4) ACCESSORY STRUCTURES shall be firmly anchored to prevent flotation, collapse and lateral movement, which otherwise may result in damage to other structures.
(5) Utilities and service facilities such as electrical and heating equipment shall be elevated or otherwise protected from intrusion of flood waters.
ADDITION (TO AN EXISTING BUILDING). Any walled and roofed expansion to the perimeter or height of a building.
APPEAL. A request for a review of the local enforcement officer's interpretation of any provision of this chapter or a request for a variance.
AREA OF SHALLOW FLOODING. A designated AO or AH Zone on a community's Flood Insurance Rate Map (FIRM) with 1% or greater annual chance of flooding to an average depth of one to three feet where a clearly defined channel does not exist, where the path of flooding is unpredictable and indeterminate; and where velocity flow may be evident. The flooding is characterized by ponding or sheet flow.
AREA OF SPECIAL FLOOD-RELATED EROSION HAZARD. The land within a community which is most likely to be subject to severe flood-related erosion losses. The area may be designated as Zone E on the Flood Hazard Boundary Map (FHBM). After the detailed evaluation of the special flood-related erosion hazard area in preparation for publication of the FIRM, Zone E may be further refined.
AREA OF SPECIAL FLOOD HAZARD. See SPECIAL FLOOD HAZARD AREA.
BASE FLOOD. The flood having a 1% chance of being equaled or exceeded in any given year. This term is also referred to as the 100-YEAR FLOOD or the 1% ANNUAL CHANCE FLOOD.
BASEMENT. The portion of a building having its floor subgrade (below ground level) on all sides.
BUILDING. See STRUCTURE.
DEVELOPMENT. Any human-made change to improved or unimproved real estate, including, but not limited to, buildings or other structures, mining, dredging, filling, grading, paving, excavating, drilling operations or permanent storage of equipment or materials.
ELEVATED BUILDING. A non-basement building built to have the lowest floor of the lowest enclosed area elevated above the ground level by means of solid foundation perimeter walls with openings sufficient to facilitate the unimpeded movement of flood water, pilings, columns, piers or shear walls adequately anchored so as not to impair the structural integrity of the building during a base flood event.
EMERGENCY FLOOD INSURANCE PROGRAM or EMERGENCY PROGRAM. The program as implemented on an emergency basis in accordance with § 1336 of the National Flood Insurance Act. It is intended as a program to provide a first layer amount of insurance on all insurable structures before the effective date of the initial FIRM.
EROSION. The process of the gradual wearing away of landmasses. This peril is not "per se" covered under the program.
EXCEPTION. A waiver from the provisions of this chapter which relieves the applicant from the requirements of a rule, regulation, order or other determination made or issued pursuant to this chapter.
EXISTING CONSTRUCTION. Any structure for which the "start of construction" commenced before the effective date of the initial floodplain management code or ordinance adopted by the community as a basis for that community's participation in the NFIP.
EXISTING MANUFACTURED HOME PARK OR SUBDIVISION. 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, final site grading or the pouring of concrete pads) is completed before the effective date of the first floodplain management code or ordinance adopted by the community as a basis for that community's participation in the NFlP.
EXISTING STRUCTURES. See EXISTING CONSTRUCTION.
EXPANSION TO AN EXISTING MANUFACTURED HOME PARK OR SUBDIVISION. 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. A general and temporary condition of partial or complete innundation of normally dry land areas from:
(1) The overflow of inland or tidal waters; and
(2) The unusual and rapid accumulation or runoff of surface waters from any source.
FLOOD ELEVATION DETERMINATION. A determination by the Federal Emergency Management Agency (FEMA) of the water surface elevations of the base flood, that is, the flood level that has a 1% or greater chance of occurrence in any given year.
FLOOD ELEVATION STUDY. An examination, evaluation and determination of flood hazards and, if appropriate, corresponding water surface elevations or an examination, evaluation and determination of mudslide (i.e., mudflow) or flood-related erosion hazards.
FLOOD HAZARD BOUNDARY MAP (FHBM). An official map of a community, issued by the Federal Emergency Management Agency, where the boundaries of areas of special flood hazard have been designated as Zone A.
FLOOD INSURANCE RATE MAP (FIRM). An official map of a community, issued by the Federal Emergency Management Agency, delineating the areas of special flood hazard or the risk premium zones applicable to the community.
FLOOD PROTECTION SYSTEM. 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.
FLOODPLAIN or FLOOD-PRONE AREA. Any land area susceptible to being inundated by water from any source (see definition of FLOODING).
FLOODPLAIN MANAGEMENT. 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.
FLOODPROOFING. Any combination of structural and non-structural 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.
FLOOD-RELATED EROSION. The collapse or subsidence of land along the shore of a lake or other body of water as a result of undermining caused by waves or currents of water exceeding anticipated cyclical levels or suddenly caused by an unusually high water level in a natural body of water, accompanied by a severe storm, or by an unanticipated force of nature, such as a flash flood, or by some similarly unusual and unforeseeable event which results in flooding.
FLOOD-RELATED EROSION AREA or FLOOD-RELATED EROSION PRONE AREA. A land area adjoining the shore of a lake or other body of water, which due to the composition of the shoreline or bank and high water levels or wind-driven currents, is likely to suffer flood-related erosion damage.
FLOOD-RELATED EROSION AREA MANAGEMENT. The operation of an overall program of corrective and preventive measures for reducing flood-related erosion damage, including, but not limited to, emergency preparedness plans, flood-related erosion control works and floodplain management regulations.
FLOODWAY. The channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than a designated height.
FREEBOARD. A factor of safety usually expressed in feet above a flood level for purposes of floodplain management. FREEBOARD tends to compensate for the many unknown factors that could contribute to flood heights greater than the height calculated for a selected size flood and floodway conditions, such as wave action, blockage of bridge or culvert openings and the hydrological effect of urbanization of the watershed.
FUNCTIONALLY DEPENDENT USE. 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. The highest natural elevation of the ground surface, prior to construction, adjacent to the proposed walls of a structure.
HISTORIC STRUCTURE. Any structure that is:
(1) Listed individually in the National Register of Historic Places (a listing maintained by the U.S. Department of Interior) or preliminary 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 the state inventory of historic places and determined as eligible by states with historic preservation programs which have been approved by the Secretary of the Interior; or
(4) Individually listed on city inventory of historic places and determined as eligible by 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.
LEVEE. A human-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. 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. The lowest floor of the lowest enclosed area, including a basement. An unfinished or flood resistant enclosure used solely for parking of vehicles, building access or storage in an area other than a basement area is not considered a building's LOWEST FLOOR; provided that, the enclosure is not built so as to render the structure in violation of the applicable non-elevation design requirements of this chapter.
MANUFACTURED HOME. A structure, transportable in one or more sections, which is built on a permanent chassis and designed for use with or without a permanent foundation when attached to the required utilities. The term MANUFACTURED HOME does not include a "recreational vehicle".
MANUFACTURED HOME PARK OR SUBDIVISION. A parcel (or contiguous parcels) of land divided into two or more manufactured home lots for rent or sale.
MAP. The Flood Hazard Boundary Map (FHBM) or the Flood Insurance Rate Map (FIRM) for a community issued by the FEMA.
MEAN SEA LEVEL. The average height of the sea for all stages of the tide. It is used as a reference for establishing various elevations within the floodplain. For the purposes of this chapter, the term is synonymous with NATIONAL GEODETIC VERTICAL DATUM (NGVD) OF 1929, the North American Vertical Datum (NAVD) of 1988, or other datum, to which base flood elevations shown on a community's flood insurance rate map are referenced.
NATIONAL GEODETIC VERTICAL DATUM (NGVD). As corrected in 1929 is a vertical control used as a reference for establishing varying elevations within the floodplain.
NEW CONSTRUCTION. Any structure for which the "start of construction" commenced on or after the effective date of the initial floodplain management ordinance and includes any subsequent improvements to the structure.
NEW MANUFACTURED HOME PARK OR SUBDIVISION. 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 this chapter or the effective date of the initial floodplain management ordinance and the term includes any subsequent improvements to the structure.
NORTH AMERICAN VERTICAL DATUM (NAVD). As corrected in1988, is a vertical control used as a reference for establishing varying elevations within the floodplain.
100-YEAR FLOOD. See BASE FLOOD.
PERSON. Includes any individual or group of individuals, corporation, partnership, association or any other entity, including state and local governments and agencies.
REASONABLY SAFE FROM FLOODING. Base flood waters will not inundate the land or damage structures to be removed from the special flood hazard area and that any subsurface waters related to the base flood will not damage existing or proposed structures.
RECREATIONAL VEHICLE. A vehicle which is:
(1) Built on a single chassis;
(2) Four hundred square feet or less when measured at the largest horizontal projection;
(3) Designed to be self-propelled or permanently towable by a light duty truck; or
(4) Designed primarily not for use as a permanent dwelling, but as temporary living quarters for recreational, camping, travel or seasonal use.
REGULATORY FLOODWAY. The channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than a designated height.
RIVERINE. Relating to, formed by or resembling a river(including tributaries), stream, brook and the like.
SPECIAL FLOOD HAZARD AREA. The land in the floodplain within a community subject to a 1% or greater chance of flooding in any given year. The area may be designated as Zone A on the 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 or A99.
SPECIAL HAZARD AREA. An area having special flood, mudslide (i.e., mudflow) and/or flood-related erosion hazards, and shown on an FHBM or FIRM as Zone A, AO, A1-30, AE, A99 or AH.
START OF CONSTRUCTION. Includes substantial improvement, and means the date the building permit was issued; provided, the actual start of construction, repair, reconstruction, rehabilitation, addition, placement or other improvement was within 180 days of the permit date. The actual START means either the first placement of permanent construction of a structure (including a manufactured home) on a site, such as the pouring of slabs or footings, the installation of piles, the construction of columns or any work beyond the stage of excavation; and includes the placement of a manufactured home on a foundation. Permanent construction does not include initial 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 a 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. For a substantial improvement, the actual START OF CONSTRUCTION means 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.
STATE COORDINATING AGENCY. The State Department of Economic and Community Development's Local Planning Assistance Office as designated by the Governor of the State of Tennessee at the request of FEMA to assist in the implementation of the National Flood Insurance Program for the state.
STRUCTURE. For purposes of this chapter, 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. Damage of any origin sustained by a structure whereby the cost of restoring the structure to its before damaged condition would equal or exceed 50% of the market value of the structure before the damage occurred.
SUBSTANTIALLY IMPROVED EXISTING MANUFACTURED HOME PARKS OR SUBDIVISIONS. Where the repair, reconstruction, rehabilitation or improvement of the streets, utilities and pads equals or exceeds 50% of the value of the streets, utilities and pads before the repair, reconstruction or improvement commenced.
SUBSTANTIAL IMPROVEMENT. Any reconstruction, rehabilitation, addition, alteration or other improvement of a structure in which the cost equals or exceeds 50% of the market value of the structure before the "start of construction" of the initial improvement. This term includes structures which have incurred "substantial damage", regardless of the actual repair work performed. The market value of the structure should be:
(1) The appraised value of the structure prior to the start of the initial improvement; or
(2) In the case of substantial damage, the value of the structure prior to the damage occurring. The term does not, however, include either:
(a) Any project for improvement of a structure to correct existing violations of state or local health, sanitary or safety code specifications which have been pre-identified by the local code enforcement official and which are the minimum necessary to assure safe living conditions and not solely triggered by an improvement or repair project; or
(b) Any alteration of a "historic structure"; provided that, the alteration will not preclude the structure's continued designation as a"historic structure".
VARIANCE. A grant of relief from the requirements of this chapter.
VIOLATION. 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 certification or other evidence of compliance required in this chapter is presumed to be in VIOLATION until such time as that documentation is provided.
WATER SURFACE ELEVATION. The height, in relation to the National Geodetic Vertical Datum (NGVD) of 1929, the North American Vertical Datum (NAVD) of 1988, or other datum, where specified of floods of various magnitudes and frequencies in the floodplains of riverine areas.
(1989 Code, § 14-302) (Ord. 1143, passed 9-25-2007; Ord. 1219, passed 6-9-2009)