Multi-Hazard Mitigation Plan: 10. Floods

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Chapter 10 Appendix 1'LOODPLAiN MANAGEMENT §27-12 "Fill"iS the placement of fill material at a ipocified location to bring die ground surface up to a desired elevation. "Fill material"can he natural sand,dirt.soil or rock.For the purposes of floodplain management, fill material may include concrete, cement,soil cement, brick, or similar material as approved on a case-try-case basis. "Flood elevation determination"means a determination by the Federal Emergency Management Agency of the water surface elevations of the bash flood,that is,the flood level that has a one percent or greater chance of occurrence in any given year. -Flood elevation study"or"flood study"moans an examination, evaluation,and determination of flood hazards and, if appropriate, corresponding water surface elevations, or an examination, evaluation and dotern ination of flood-rolated erosion hazards. "Hood,flooding,or floodwater"means: (1) A general and temporary condition of partial or complete inundation of normally dry land areas from: (A) The overflow of inland or tidal waters: (l3) 'the unusual and rapid accumulation of runoff or surface waters from any source which arc approximately caused by flooding as defined in paragraph(A)(ii)of this definition and are akin to a river of water on the surfaces of normally dry land areas,as when earth is carried by a current of water and deposited along the path of the current:and (2) The collapse or subsidence of land along the shore of a lake or other body of water as a result of erosion or undermining caused by waves or currents of water exceeding anticipated cyclical levels or suddenly caused by an unusually high water level in a natural body of water,accompanied by a severe start.or by an unanticipated force of nature,such as flash flood or an abnormal tidal Surge,or by some similarly unusual and unforeseeable event which results in flooding as defined in paragraph (1)(A) of this definition. "Flood Insurance Rate Xtap(11RIM)" means the official map on which the Federal Lmergency, Management Agency has delineated both the areas of special flood hazards and the risk premium zones applicable to the community. "Rood Insurance Study" means the official report provided by the federal Emergency Management Agency that includes flood profiles,the Flood Insurance Rate Map.and the water surface clevafion of the base flood. "Flood protection system" means those physical structural works for which funds have been authorized. appropriated, and expended and which have been constructed specifically to modify flooding in order to reduce the extent of the area within a community subject to a "special flood hazard"and the extent of the depths of associated flooding.Such a system typically includes hurricane tidal harriers, dams reservoirs,levees, or dikes.These specialized flood modifying works are those constructed to conform with sound engineering standards. "Floodplain administrator"is the individual appointed to administe7 and enforce the floodplain management regulations.'this person shall be the director ofpublic works of the County of Ifawai`i or the director's duly authorized representative who shall be a currently licensed professional engineer in the Stale of Hawaii. "lloodplain management"means 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 lloodplain management regulations. 27-5 SUPP s (1-2008) 1 0A-7 Hawaii County Multi-Hazard Mitigation Plan