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<br />Administrator, Permit Authority, or Board of Adjustment <br />pursuant to Section 4 of these regulations. <br /> <br />Flood Proofing - Any combination of structural and <br />nonstructural additions, changes, or adjustments to <br />structures which reduce or eliminate flood damage to real <br />estate or improved real property, water and sanitary <br />facilities, and structures and their contents. <br /> <br />Floodway District (FWD) - The high hazard area of a Desig- <br />nated Floodplain District. It includes the channel of a <br />stream or other watercourse and any adjacent floodplain <br />areas that must be kept free of development so the base <br />flood can be carried without substantial increase in flood <br />height. Specifically, a Floodway District may be defined <br />according to one or both of the following criteria: <br /> <br />(a) The area of the Designated Floodplain District where <br />floodwater from the base flood is 18 inches or greater <br />in depth. <br /> <br />(b) The stream channel plus any adjacent floodplain areas <br />that must be kept free of development so the base flood <br />can pass with no more than a .5 foot increase in the <br />water surface elevation or the energy grade line, pro- <br />viding hazardous velocities are not produced. If the <br />floodway is not identified, it is considered to be <br />identical to the Designated Floodplain District. <br /> <br />However in no instances shall the Floodway-Floodfringe <br />boundary be closer than 25 feet to the streambank or <br />the outer limits of the Designated Floodplain District: <br />if less restrictive. <br /> <br />Floodfrinqe District (FFD) - the low hazard area between the <br />outer boundary of a Floodway District and the outer limit of <br />a Designated Floodplain District. <br /> <br />Flood Hazard Boundary Map (FHBM) - An official map of a <br />communlty lssued by the Federal Insurance Administration, <br />on which areas potentially subject to flooding have been <br />delineated. <br /> <br />Flood Insurance Rate map (FIRM) - An official map of a <br />community issued by the Federal Insurance Administration, on <br />which the area subject to flooding by the base flood has <br />been delineated, either by approximate or detailed <br />engineering study, or both, and on which flood insurance <br />rate zones have been delineated. Such map may also include <br />the delineation of water surface elevations and floodway <br />boundaries. <br /> <br />Floodprone District (FPD) - An area, in and adjacent to a <br />stream or other water course, subject to flooding, which is <br /> <br />-4~ <br />