Laserfiche WebLink
<br />As shown on the Flood Boundary and F100dway Map (Exhibit 2), the <br />floodway boundaries were determined at cross sections; between cross <br />sections, the boundaries were interpolated. In cases where the <br />f1bodway and 100-year flood boundaries are close together, only the <br />f100dway boundary has been shown. <br /> <br />. <br /> <br />The area between the f100dway and the boundary of the 100-year flood <br />is termed the floodway fringe. The floodway' fringe thus encompasses <br />the portion of the flood plain that could be completely obstructed <br />without increasing the water-surface elevation of the 100-year flood <br />more than 1.0 foot at any point. Typical relationships between the <br />f100dway and the f100dway fringe and their significance to flood <br />plain development are shown in Figure 2. <br /> <br />.: <br /> <br />I- <br /> <br />100-YEAR FLOOD PLAIN <br /> <br />) I <br /> <br />FLOODWAY <br />FRINGE <br /> <br /> <br />FLOODWAY <br /> <br />FLOODWA Y <br />FRINGE <br /> <br />STREAM <br />CHANNEL <br /> <br />FLOOD ELEVATION WHEN <br />CONFINED WITHIN FLOODWAY <br /> <br /> <br />AREA OF FLOOD PLAIN THAT COULD <br />BE USED FOR DEVELOPMENT BY <br />RAISING GROUND <br /> <br />FLOOD ELEVATION <br />BEFORE ENCROACHMENT <br />ON FLOOD PLAIN <br /> <br />LINE AS IS THE FLOOD ELEVATION BEFORE ENCROACHMENT. <br />LINE CD IS THE FLOOD ELEVATION AFTER ENCROACHMENT. <br />.SURCHARGE IS NOT TO ExceeD 1.0 FOOT (F1A REQUIREMENT) OR LESSER AMOUNT IF SPECIFIED BY STATE. <br /> <br />. <br /> <br />Figure 2. F100dway Schematic <br /> <br />27 <br />