Unless specifically defined below, words or phrases used in this chapter shall be interpreted so as to give them the meaning they have in common usage and to give this chapter its most reasonable application:
ACCESSORY STRUCTURES: Includes sheds or garages that are exempt from elevation or floodproofing requirements. Note subsection 13-1-9B4 of this chapter for explanation.
APPEAL: A request for a review of the Heppner planning commission'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). The base flood depths range from one to three feet (3'); 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 (1%) or greater chance of flooding in any given year.
BASE FLOOD: The flood having a one percent (1%) chance of being equaled or exceeded in any given year.
BASEMENT AND CRAWL SPACES: Any structure in a regulatory floodplain having its lowest level (either finished or unfinished) below ground level (subgrade) on all four (4) sides is not permissible under local flood damage prevention ordinance requirements and the regulations governing the NFIP. Therefore, neither basements nor excavated (subgrade) crawl spaces can be constructed in the regulatory floodplain.
CRITICAL FACILITY: 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, installations which produce, use, or store hazardous materials or hazardous waste. Construction of new critical facilities shall be, to the extent possible, located outside the limits of the special flood hazard area (SFHA) (100-year floodplain). Construction of new critical facilities shall be permissible within the SFHA if no feasible alternative site is available. Critical facilities constructed within the SFHA shall have the lowest floor elevated three feet (3') or to the height of the 500-year flood, whichever is higher. Access to and from the critical facility should also be protected to the height utilized above. Floodproofing and sealing measures must be taken to ensure that toxic substances will not be displaced by or released into floodwaters. Access routes elevated to or above the level of the base flood elevation shall be provided to all critical facilities to the extent possible.
DEVELOPMENT: Any manmade change to improved or unimproved real estate, including, but not limited to, buildings or other structures, mining, dredging, filling, grading, paving, excavation or drilling operations located within the area of special flood hazard.
FLOOD INSURANCE RATE MAP (FIRM): The official map on which the federal insurance administration has delineated both the areas of special flood hazards and the risk premium zones applicable to the community.
FLOOD INSURANCE STUDY: The official report provided by the federal insurance administration that includes flood profiles, the flood boundary-floodway map and the water surface elevation of the base flood.
FLOOD OR FLOODING: A general and temporary condition of partial or complete inundation of normally dry land areas from:
   A.   The overflow of inland or tidal waters, and/or
   B.   The unusual and rapid accumulation of runoff of surface waters from any source.
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 (1').
HAZARDOUS MATERIALS: A combustible, flammable, corrosive, explosive, toxic or radioactive substance which is potentially harmful to humans and the environment.
LOWEST FLOOR: The lowest floor of the lowest enclosed area (including basement). An unfinished or flood resistant enclosure, usable 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 such enclosure is not built so as to render the structure in violation of the applicable nonelevation design requirements of this chapter found at subsection 13-1-9B1b 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 connected to the required utilities. For floodplain management purposes, the term "manufactured home" also includes park trailers, travel trailers and other similar vehicles placed on a site for greater than one hundred eighty (180) consecutive days. For insurance purposes, the term "manufactured home" does not include park trailers, travel trailers and other similar vehicles.
MANUFACTURED HOME PARK OR SUBDIVISION: A parcel (or contiguous parcels) of land divided into two (2) or more manufactured home lots for rent or sale.
NEW CONSTRUCTION: Structures for which the "start of construction" commenced on or after the effective date of this chapter.
PUBLIC WORKS PROJECTS: Projects that are necessary to enhance or maintain general public welfare. Such projects may include, but are not limited to, flood control structures, public buildings, city infrastructures, utilities, parks and projects associated with resource protection.
RECREATIONAL VEHICLE: A vehicle which is: built on a single chassis; four hundred (400) square feet or less when measured at the largest horizontal projection; designed to be self- propelled or permanently towable by a light duty truck; and 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, placement or other improvement was within one hundred eighty (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 state 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 foundation 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.
STRUCTURE: A walled and roofed building including a gas or liquid storage tank that is principally aboveground.
SUBSTANTIAL IMPROVEMENT: A. Any repair, reconstruction or improvement of a structure, the cost of which equals or exceeds fifty percent (50%) 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 purposes 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.
   B.   The term does not, however, include either:
1. Any project for improvement of a structure to comply with existing state or local health, sanitary or safety code specifications which are solely necessary to assure safe living conditions; or
2. Any alteration of a structure listed on the national register of historic places or a state inventory of historic places.
VARIANCE: A grant of relief from the requirements of this chapter which permits construction in a manner that would otherwise be prohibited by this chapter. (Ord. 463, 5-4-1987; amd. Ord. 488-91, 7-8-1991; Ord. 547-04, 9-13-2004; Ord. 561-07, 10-8-2007)