Except where the context clearly indicates otherwise, the definitions given in this section shall govern the provisions of this chapter.
Appeal.A request for review of the Director'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 the Flood Insurance Rate Map (FIRM) prepared by the Federal Emergency Management Agency (FEMA). The base flood depths range from one to three feet; a clearly defined channel does not exist; the path of flooding is unpredictable and indeterminate; and velocity flow may be evident.
Area of Special Flood Hazard.The land in the floodplain within a community subject to a one percent or greater chance of flooding in any given year. This area is designated as Zone A, AO, AH, AE, V, and VE on the FIRM.
Base Flood.A flood having a one percent chance of being equaled or exceeded in any given year (also called the 100-year flood).
Basement.Any area of a building having its floor subgrade on all sides.
Breakaway Wall.Any type of wall, whether solid or lattice, and whether constructed of concrete, masonry, wood, metal, plastic, or any other suitable building material which is not part of the structural support of the building and which is designed to break away under abnormally high tides or wave action without damage to the structural integrity of the building on which it is used or any building to which it might be carried by flood waters. A breakaway wall shall have a safe design loading resistance of not less than 10 and no more than 20 pounds per square foot. Use of breakaway walls must be certified by a California registered engineer or architect and shall meet the following conditions:
1. Breakaway wall collapse shall result from a water load less than that which would occur during the base flood; and
2. The elevated portion of the building shall not incur any structural damage due to the effects of wind and water loads acting simultaneously in the event of a base flood.
Coastal High Hazard Area.The area subject to high velocity waters including, but not limited to, coastal and tidal inundation or tsunamis. The area is designated on a FIRM as Zone V and VE and as -FP3 in this chapter.
Development.Any man-made change to improved or unimproved real estate, including but not limited to buildings or other structures, mining, dredging, filling, grading, paving, excavating, or drilling operations or storage of equipment and materials.
Existing Manufactured Home Park or Subdivision.A manufactured home park or subdivision for which the construction of facilities including utilities, final grading or paving of pads and the construction of streets was completed before the effective date of the City's floodplain management regulation.
Expansion to an Existing Manufactured Home Park or Subdivision.The preparation of additional manufactured home sites in an existing manufactured home park or subdivision by the construction of facilities servicing the lots on which the additional manufactured homes are to be affixed including, but not limited to, installation of utilities, 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 inundation of normally dry land areas from the overflow of inland or tidal waters; the unusual and rapid accumulation of runoff of surface waters from any source; mudslides; and condition resulting from flood-related erosion.
Flood Insurance Rate Map (FIRM).The official maps on which areas of special flood hazard, the risk premium zones and the floodway applicable to the community are delineated.
Flood Insurance Study.The "Flood Insurance Study for Orange County, CA and Incorporated Areas," prepared by the Federal Emergency Management Agency (FEMA), providing flood profiles, the flood insurance rate maps, and the water surface elevations of the base flood.
Floodplain.Any land area susceptible to being inundated by water from any source.
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 control.
Floodplain Management Regulations.Zoning and subdivision ordinances, building codes, health regulations, special purpose ordinances (such as floodplain, grading and erosion control) and other applications of police power. This term describes federal, state or local regulations in any combination thereof which provide standards for the purpose of preventing and reducing flood damage and loss.
Floodproofing.Any combination of structural and nonstructural additions, changes or adjustments to nonresidential structures which reduce or eliminate flood damage to real estate or improved real property, water, and sanitary facilities, structures, and their contents. Floodproofing techniques are further described in FEMA Technical bulletins 1-93, 3-93, and 7-93.
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 one foot.
Functionally Dependent Use.A use which cannot perform its intended purposes 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 Grade.The highest natural elevation of the ground surface next to the proposed walls of a structure prior to construction.
Historic Structure.Any structure that is:
1. Listed individually in the National Register of Historic Places (a listing maintained by the Department of 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 the Interior; or
4. Individually listed on a local inventory of historic places in communities with historic preservation programs that have been certified either by an approved state program as determined by the Secretary of the Interior or directly by the Secretary of the Interior in states without approved programs.
Lowest Floor.The lowest floor of the lowest enclosed area (including basement). An unfinished or flood-resistant enclosure, usable solely for the 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 such 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 is designed for use with or without a permanent foundation when attached to the required utilities. The term "manufactured home" does not include a "recreation vehicle."
Mean Sea Level.The National Geodetic Vertical Datum of 1929 or other datum, to which base flood elevations shown on the FIRM are referenced.
New Construction.Structures for which the "start of construction" commenced on or after the effective date of the City's floodplain management control (February 16, 1983).
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 February 16, 1983.
Recreational Vehicle.A vehicle which is:
1. Built on a single chassis;
2. 400 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; and
4. Designed primarily not for use as a permanent dwelling but as temporary living quarters for recreational, camping, travel, or seasonal use.
Sand Dunes.Naturally occurring accumulations of sand in ridges or mounds landward of the beach.
Special Flood Hazard Area (SFHA).An area in the floodplain subject to a one percent or greater chance of flooding in any given year. It is shown on FIRM as Zone A, AO, A1-A30, AE, A99, AH, V130, VE or V.
Start of Construction.Includes substantial improvement and other new development 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 is 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 the following: land preparation such as clearing, grading, and filling; the installation of streets and/or walkways; excavation for a basement, footings, piers, or foundations or the erection of temporary forms; the installation of accessory buildings, such as garages or sheds that are not occupied as dwelling units or connected to the main structure. In the case of substantial improvements, the actual start of construction is the first alteration to any wall, ceiling, floor, or other structural part of a building, whether or not that alteration affects the external dimensions of the building.
Structure.A walled and roofed building, including a gas/liquid storage tank and a manufactured home, that is principally aboveground. It does not include open pavilions, bleachers, carports and similar structures that do not have at least two rigid walls and a roof.
Substantial Damage.Damage of any origin sustained by a structure whereby the cost of restoring the structure to the condition existing before damage would equal or exceed 50% of the market value before the damage occurred.
Substantial Improvement.Any repair, reconstruction, rehabilitation, addition, or improvement of a structure, the cost of which equals or exceeds 50% of the market value of the structure before such repair, reconstruction, rehabilitation, addition, or improvement. This term includes structures which have incurred "substantial damage," regardless of the actual repair work performed. This term does not, however, include:
1. Any improvement to a structure to comply with existing state or local health, sanitary, or safety code specifications which are solely necessary to ensure 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."
Cost for a Repair, Reconstruction, Rehabilitation, Addition, or Improvement Project. As used herein, shall be determined by valuation figures in use by the Director or itemized estimates for both materials and labor made by licensed contractors or other professional estimators in the construction industry. |
Market Value of a Structure. As used herein, shall be the depreciated value of the structure prior to such repair, reconstruction, rehabilitation, addition, or improvement as shown in a report by a qualified real estate appraiser. In the alternative, the Director may use other methods or sources to determine market value as deemed acceptable by FEMA including use of replacement cost depreciated based on accepted industry standards. |
Variance.A grant of relief from the requirements of this chapter which permits construction in a manner which would otherwise be prohibited.
Violation.The failure of a structure or other development to be fully compliant with this chapter. A structure or other development without the elevation certificate, other certifications, or other evidence of compliance required in this chapter is presumed to be in violation until such time as that documentation is provided.
(3285-7/95, 3334-6/97, 3845-12/09)