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<br />. <br /> <br />Federal Insurance Administration (FIA). The Corps of Engineers, the Soil <br /> <br /> <br />Conservation Service (SCS), and the Tennessee Valley Authority (TVA). <br /> <br /> <br />This is discussed in greater detail in the next section. It is felt <br /> <br /> <br />that presently the FIA has the most acceptable data for estimating flood <br /> <br /> <br />damages for residential structures, and their data was accordingly used <br /> <br /> <br />in this study. See Tables III-I and III-2. The FIA data are only valid <br /> <br /> <br />for residential structures and generalized curves for commercial and <br /> <br /> <br />industrial areas do not exist. These must be handled on a case-by-case <br /> <br /> <br />basis. See the additional discussion in the next section, along with a <br /> <br /> <br />graphical comparison of the depth versus damage data of the several <br /> <br /> <br />agencies mentioned. <br /> <br /> <br />Step 8 - Analyze the "Do-Nothing" Alternative <br /> <br /> <br />The floodplains, delineated in the hydraulic analysis for future <br /> <br /> <br />conditions, are theoretical and represent what would happen if the <br /> <br /> <br />design storm occurred today and the basin had its future development and <br /> <br /> <br />runoff characteristics. <br /> <br /> <br />Overlay the anticipated future development pattern on the undeveloped <br /> <br /> <br />portions of the floodplain maps. Estimate probable encroachment into the <br /> <br /> <br />floodplain, using previous encroachment as a guide, but also considering <br /> <br /> <br />such factors as existing floodplain regulations, community awareness of <br /> <br /> <br />flooding potentials, and development pressures. For a sophisticated <br /> <br /> <br />analysis, alternative development futures can be considered. Do not <br /> <br /> <br />assume encroachment based on the rights-of-way required for the flood <br /> <br /> <br />control alternatives. The estimated encroachment limits represent what <br /> <br /> <br />might happen without the benefit of the results of the flood control study <br /> <br /> <br />being conducted. Flood damages computed for this condition will result <br /> <br /> <br />if no flood control measure is acted upon (the do-nothing alternative). <br /> <br />67 <br />