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<br />. <br /> <br /> <br />. <br /> <br /> <br />. <br /> <br /> <br />~ <br /> <br />DEVELOP BFE DATA <br />60.3 (b) (3) <br />Simplified methods may not be used <br />by the community to complete an <br />Elevation Certificate used for support <br />of LOMA & LOMR-F applications. <br /> <br />Detail Methods <br />3 key elements 'V-o- ~ <br /> <br />. Floodplain Geometry (to-~PhY) <br />. Flood Discharge - VOlu~:~~;~rology) <br />. Flood Height - Depth (hydraulics) <br /> <br />Q.~~\.R r (A>S, ~1Jv.) <br />\\ ....,.("'.!~~ <br />(o,~~ ~ <br /> <br />Hydrology <br /> <br />. Peak rate of stream flow during a flood <br />, <br />. Cubic feet per second (cfs) <br />. 100 year peak discharge <br /> <br /> <br /> <br />DEVELOP BFE DATA <br />60.3 (b) (3) <br /> <br />Communities must use the detailed <br />methodologies or other methods <br />comparable to those used in Flood <br />Insurance Studies (FIS). <br /> <br />Topography <br /> <br />. Geometry of a cross section of the <br />floodplain <br /> <br />,< . Vertical coordinates (elevation) <br /> <br />. Topographic maps <br /> <br />. Field surveyed cross sections <br /> <br />. The greater the level of detail on the <br />topo map the more accurate the BFE. <br /> <br /> <br />oDralnage Area <br />'Percent of impervious area <br />oRainfalllntensity <br /> <br />6 <br />