Chapter 8 FLOODPLAIN REGULATIONS*



Section 8-5 Definitions.

 

    The following words, terms and phrases, when used in this  chapter, shall have the meanings  ascribed to them in this section, except where the context clearly indicates a different meaning:

    Addition to an existing building means any walled and roofed expansion to the perimeter of a  building in which the addition is connected by a common load-bearing wall other than a fire wall.  Any walled and roofed addition which is connected by a fire wall or is separated by independent perimeter load-bearing walls is new construction.

    Appeal means a request for a review of the chief building official’s interpretation of any  provisions of this chapter or a request for a variance.

    Area of shallow flooding means a designated AO or VO zone on a community’s Flood  Insurance Rate Map (FIRM) with base flood depths from one (1) to three (3) 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.

    Area of special flood hazard is the land in the floodplain within a community subject to a one (1) percent or greater chance of flooding in any given year.

    Base flood means the flood having a one (1) percent chance of being equaled or exceeded in any given year.

    Basement means that portion of a building having its floor subgrade (below ground level) on all sides.

    Breakaway wall means a wall that is not a 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 the supporting foundation  system.

    Building means any structure built for support, shelter, or enclosure for any occupancy or storage.

    Development means any manmade 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 materials.

    Elevated building means a nonbasement building built to have the lowest floor elevated above  the ground level by means of fill, solid foundation perimeter walls, pilings, columns (post and piers), shear walls, or breakaway walls.

    Existing construction means any structure for which the "start of construction" commenced  before the effective date of the ordinance from which this chapter derives.

    Existing manufactured home park or subdivision means 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 ordinance from which this chapter derives.

    Expansion to an existing manufactured home park or subdivision means 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 means a general and temporary condition of partial or complete inundation of normally dry land areas from:

    (1)    The overflow of inland or tidal waters;

    (2)    The unusual and rapid accumulation  or runoff of surface waters from any source.

    Flood Hazard Boundary Map (FHBM) means an official map of a community, issued by the Federal Emergency Management Agency, where the boundaries of the areas of special flood hazard  have been defined as Zone A.

    Flood Insurance Rate Map (FIRM) means an official map of a community, on which the  Federal Emergency Management Agency has delineated both the areas of special flood hazard and  the risk premium zones applicable to the community.

    Flood Insurance Study is the official report provided by the Federal Insurance Administration.  The report contains flood profiles, as well as the Flood Boundary Floodway Map and the water  surface elevation of the base flood.

    Floodway means 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 (1) foot.

    Floor means the top surface of an enclosed area in a building, including basement, i.e., top  of  slab in concrete slab construction or top of wood flooring in wood frame construction. The term  does not include floor of a garage used solely for parking vehicles.

    Highest adjacent grade means the highest natural elevation of the ground surface, prior to construction, next to the proposed walls of a structure.
    Historic structure means any structure that is:

    a.    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; or

    b.    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; or

    c.    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

    d.    Individually listed on a local inventory of historic places in communities with historic  preservation programs that have been certified either:

        1.    By an approved state program as determined by the Secretary of the Interior, or

        2.    Directly by the Secretary of the Interior in states without approved programs.

    Manufactured home means a structure, transportable in one (1) or more sections, which is built  on a permanent chassis and designed to be used with or without a permanent foundation when  connected to the required utilities. The term also includes park trailers, travel trailers, and similar  transportable structures placed on a site for one hundred eighty (180) consecutive days or longer and intended to be improved property.

    Mean sea level means 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 purposes of this chapter, the term is synonymous with National Geodetic Vertical Datum (NGVD).

    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 means structures for which the start of construction commenced on or after  the effective date of the ordinance from which this chapter derives.

    New manufactured home park or subdivision means 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 the ordinance from which this chapter derives.

    Recreational vehicle means a vehicle which is:

    a.    Built on a single chassis;

    b.    Four hundred (400) square feet or less when measured at the largest horizontal projection;

    c.    Designed to be self-propelled or permanently towable by a light duty truck; and

    d.    Designed primarily not for use as a permanent dwelling but as temporary living quarters for  recreational, camping, travel, or seasonal use.

    Start of construction includes substantial improvement, and means the date the building permit was issued, provided the actual start of construction, repair, reconstruction, or improvement was within one hundred eighty (180) days of the permit date. The actual start means the first placement  of permanent construction of a structure, including a manufactured home, on a site, such as the  pouring of slabs or footings, installation of piles, 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 or walkways or both, nor does it include excavation for  basements, 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.

    Structure means a walled and roofed building that is principally above ground, a manufactured home, a gas or liquid storage tank, or other manmade facilities or infrastructures.

    Substantial damage means damage of any origin sustained by a structure whereby the cost of  restoring the structure to its before damaged condition would equal or exceed fifty (50) percent of  the market value of the structure before the damage occurred.

    Substantial improvement means any repair, reconstruction, alteration, or improvement to a  structure, the cost of which equals or exceeds fifty (50) percent of the market value of the  structure, either (1) before the improvement or repair is started, or (2) if the structure has been damaged and is being restored, before the damage occurred. For the purpose of this definition "substantial improvement" is considered to occur when the first alteration of any wall, ceiling,  floor, or other structural part of the building commences, whether or not that alteration affects the external dimensions of the structure. The term does not, however, include any project  for improvement of a structure required to comply with existing health, sanitary, or safety code  specifications which are solely necessary to assure safe living conditions.

    Substantially improved existing manufactured home park or subdivisions is where the repair, reconstruction, rehabilitation or improvement of the streets, utilities and pads equals or exceeds fifty (50) percent of the value of the streets, utilities and pads before the repair, reconstruction or improvement commenced.

    Variance is a grant of relief from the requirements of this chapter which permits construction in a manner otherwise prohibited by this chapter where specific enforcement would result in unnecessary hardship.

(Ord. of 6-22-87; Ord. of 7-12-93,   I)