As used in this section, the following terms shall have the meanings indicated:
AREA OF SHALLOW FLOODINGA designated Zone AO on a community's Flood Insurance Rate Map with a one-percent annual chance or greater 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 where velocity flow may be evident. Such flooding is characterized by ponding or sheet flow.
BASE FLOODThe flood having a one-percent chance of being equaled or exceeded in any given year; the base flood also is referred to as the one-hundred-year flood (or the 1%-annual-chance flood).
BASE FLOOD DISCHARGEThe volume of water resulting from a base flood as it passes a given location within a given time, usually expressed in cubic feet per second (cfs).
BASE FLOOD ELEVATIONThe water surface elevation of the base flood in relation to the datum specified on the community's Flood Insurance Rate Map. In areas of shallow flooding, the base flood elevation is the natural grade elevation plus the depth number specified in feet on the Flood Insurance Rate Map, or at least two feet if the depth number is not specified.
DRY FLOODPROOFINGAny 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.
ELEVATION CERTIFICATEThe National Flood Insurance Program elevation certificate (FEMA Form 086-0-33), used to document building elevations and other information about buildings. When required to be certified, the form shall be completed by a licensed professional land surveyor.
ENCLOSURE BELOW THE LOWEST FLOORAn unfinished or flood-resistant enclosure usable solely for parking of vehicles, building access, or storage, in an area other than a basement.
FEMA TECHNICAL BULLETINA series of guidance documents published by FEMA to provide guidance concerning building performance standards of the National Flood Insurance Program. See sections where specific technical bulletins are identified.
FLOOD DAMAGE-RESISTANT MATERIALSAny construction material capable of withstanding direct and prolonged contact with floodwaters without sustaining any damage that requires more than cosmetic repair. See FEMA Technical Bulletin No. 2, Flood Damage-Resistant Materials Requirements, and FEMA Technical Bulletin No. 8, Corrosion Protection for Metal Connectors in Coastal Areas.
FLOOD INSURANCE RATE MAP (FIRM)An official map on which the Federal Emergency Management Agency has delineated special flood hazard areas to indicate the magnitude and nature of flood hazards, and to designate applicable flood zones.
(a) Zone A: special flood hazard areas inundated by the 1%-annual-chance flood; base flood elevations are not determined.
(b) Zone AE: special flood hazard areas subject to inundation by the 1%-annual-chance flood; base flood elevations are determined; floodways may or may not be determined.
(c) Zone AO: areas of shallow flooding, with or without a designated average flood depth.
(d) Zone X (shaded): areas subject to inundation by the five-hundred-year flood (0.2% annual chance); areas subject to the 1%-annual-chance flood with average depths of less than one foot or with contributing drainage area less than one square mile; and areas protected by levees from the base flood.
(e) Zone X (unshaded): areas determined to be outside the 1%-annual-chance flood and outside the five-hundred-year floodplain.
(f) Zone VE: special flood hazard areas subject to inundation by the 1%-annual-chance flood and subject to high-velocity wave action (also referred to as coastal high hazard areas).
(g) Limit of Moderate Wave Action (LiMWA): the inland limit of the area affected by waves greater than 1.5 feet during the base flood. Base flood conditions between Zone VE and LiMWA will be similar to, but less severe than, those in Zone VE.
FLOOD INSURANCE STUDYThe official report in which the Federal Emergency Management Agency has provided flood profiles, floodway information, and the water surface elevations.
FLOODPROOFING CERTIFICATEThe National Flood Insurance Program floodproofing certificate for nonresidential structures (FEMA Form 86-0-34), used by registered professional engineers and architects to certify dry floodproofing designs.
FLOODWAYThe channel of a river or other watercourse and the adjacent land areas that must be reserved in order to pass the base flood discharge such that the cumulative increase in the water surface elevation of the base flood discharge is no more than a designated height.
FREEBOARDA factor of safety usually expressed in feet above a flood elevation for the 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, obstructed bridge openings, debris and ice jams, and the hydrologic effect of urbanization in a watershed.
FUNCTIONALLY DEPENDENT USEA 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 ship building and ship repair facilities, but does not include long-term storage or related manufacturing facilities.
HIGHEST ADJACENT GRADEThe highest natural elevation of the ground surface prior to construction next to the proposed walls of a structure.
HYDROLOGIC AND HYDRAULIC ENGINEERING ANALYSISAn analysis performed by a professional engineer, licensed in the State of Delaware, in accordance with standard engineering practices as accepted by FEMA, used to determine the base flood, other-frequency floods, flood elevations, floodway information and boundaries, and flood profiles.
LETTER OF MAP CHANGEAn official FEMA determination, by letter, to amend or revise an effective Flood Insurance Rate Map, Flood Boundary and Floodway Map, and Flood Insurance Study. Letters of map change include:
(a) Letter of Map Amendment (LOMA): an amendment based on technical data showing that a property was inadvertently included in a designated special flood hazard area. A LOMA amends the current effective Flood Insurance Rate Map and establishes that a specific property is not located in a special flood hazard area.
(b) Letter of Map Revision (LOMR): a revision based on technical data that may show changes to flood zones, flood elevations, floodplain and floodway delineations, and planimetric features. One common type of LOMR, a Letter of Map Revision Based on Fill (LOMR-F), is a determination that a structure or parcel of land has been elevated by fill above the base flood elevation and is, therefore, no longer exposed to flooding associated with the base flood. In order to qualify for this determination, the fill must have been permitted and placed in accordance with these regulations.
(c) Conditional Letter of Map Revision (CLOMR): a formal review and comment as to whether a proposed flood protection project complies with the minimum National Flood Insurance Program requirements for such projects with respect to delineation of special flood hazard areas. A CLOMR does not amend or revise effective Flood Insurance Rate Maps, Flood Boundary and Floodway Maps, or Flood Insurance Studies. Upon submission to and approval of certified as-built documentation, a Letter of Map Revision may be issued.
LOWEST FLOORThe lowest floor of the lowest enclosed area (including basement) of a structure. This definition excludes an enclosure below the lowest floor, which is an unfinished or flood-resistant enclosure usable solely for parking of vehicles, building access or storage, in an area other than a basement area, provided that such enclosure is built in accordance with the applicable design requirements specified in these regulations for enclosures below the lowest floor.
MANUFACTURED HOMEA 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.
NEW CONSTRUCTIONBuildings and structures for which the start of construction commenced on or after September 25, 1981, including any subsequent improvements to such structures.
PERSONAn individual or group of individuals, corporation, partnership, association, or any other entity, including state and local governments and agencies.
SPECIAL FLOOD HAZARD AREAThe land in the floodplain subject to a one-percent or greater chance of flooding in any given year. Special flood hazard areas are designated by the Federal Emergency Management Agency in Flood Insurance Studies and on Flood Insurance Rate Maps as Zones A, AE, AO, and Zone VE. The term includes areas shown on other flood hazard maps that are specifically listed or otherwise described in Subsection
A(4).
START OF CONSTRUCTIONThe date of issuance of permits for new construction and substantial improvements, 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 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 the placement of a manufactured home on a foundation. 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 a basement, footings, piers, or foundations or the erection of temporary forms; nor does it include the installation on the property of accessory structures, 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.
STRUCTURE or BUILDINGFor floodplain management purposes only, a walled and roofed building, including a gas or liquid storage tank, that is principally above ground, as well as a manufactured home.
VIOLATIONFor the purposes of this section, 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 these regulations is presumed to be in violation until such time that documentation is provided.