Laserfiche WebLink
<br />J <br /> <br />I, <br /> <br />100 YEAR FLOOD PLAIN <br /> <br />.1 <br /> <br />FLOODWAY <br />FRINGE <br /> <br />FlOQOWIW <br /> <br />FLOODWAY <br />FRINGE <br /> <br />, <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 />LINE A - 6 IS THE FLOOD ELEVATION BEFORE ENCROACHMENT <br />LINE C. 0 IS THE FLOOD ELEVATION AFTER ENCROACHMENT <br /> <br />Figure 7. Floodway Schematic <br /> <br />5.0 INSURANCE APPLICATION <br /> <br />In order to establish actuarial insurance rates, the Federal Emergency <br />Management Agency has developed a process to transform the data from the <br />engineering study into flood insurance criteria. This process includes <br />the determination of reaches, Flood Hazard Factors, and flood insurance <br />zone designations for the Rio Grande at Alamosa. <br /> <br />5.1 Reach Determinations <br /> <br />Reaches are defined as lengths of watercourses having relatively the <br />same flood hazard, based on the average weighted difference in <br />-, water-surface elevations between the 10- and 100-year floods. This <br />difference does not have a variation greater than that indicated in <br />the following table for more than 20 percent of the reach. <br /> <br />13 <br />