Multi-Hazard Mitigation Plan: 10. Floods

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Chapter-10 Appendix §27-12 IIAW AI'l COUNTY CODE Section 27-12. Definitions. Unless specifically dcftned below,words nr 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 use"means a use which is incidental and subordinate to the principal use of the parcel of land on which it is located. "Appeal" means a request for a review of the floodplain adminisirator's interpretation of any provision of this chapter or denial of a request for a variance. "Area of shallow flooding"means a designated AU or All tone on the Flood Insurance state blap (1-MI).'Ilie base flood depths range from one to three feet;a clearly defmal channel does not exist: the path of flooding is unpredictable and indeterminate: and velocity flow may he evident. Such flooding is characterized by ponding or sheet flow. "BackfUl"means the placement of 511 material within a specified depression,hole or excavation pit below the surrounding adjacent ground level as a means of improving floodwater conveyance or to reslore the land to the natural contours existing prior to excavation. "Base flood"means the flood having a one percent chance of being equaled or exceeded in any given year(also called the"one-hundred-year flood"). "Base flood elevation"means the water surface elevation of the base flood. "Basement" mean.%any area of the building having its flour subgrade(below ground level)on all sides. "Breakaway walls" are any type of walls, whether solid or lattice. and whether constructed of concrete,masonry,wood,metal,plastic nr 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 causing any damage to the structural integrity of the building on which they are used or any buildings to which they night be carried by floodwaters.A breakaway wall shall have a safe design loading resistance of not less than ten and no more than twenty pounds per square foot.Use of breakaway walls must be certified by a Gccnscd structural 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) 'lime 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 the base flood. "Buffer zones"are areas bordering and within 50 feet of special flood hazard areas with base flood elevations, depth numbers spccified in feet on the FIRNI or other areas that have boon studied and identified with base flood elevations or depth numbers. 'icomtal high hazard area'-See"Zone V"and Zone VL." "Development"means any man-made change to improved or unimproved real estate,including bill not limited to buildings or other structures,mining, dredging, tilling,grading,paving,excavation or drilling operations or storage of equipment or materials. "Drainage fadlity"-See"Watercourse." "Encroachment" means the advance or infringement of uses, plant growth, fill, excavation, buildings,permanent structures or development into a floodplain which may impede or alter the flow capacity of a floodplain_ "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 he affixed(including,at a minimum.the installation of utilities,the construction of shreds, and either final site grading or the pouring of concn:le pads)is completed before May 5,1982. SUPP 5 (1-2008) 27-4 1 0A-6 Hawaii County Multi-Hazard Mitigation Plan