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<br />adjustment for one and two story structures with basements and flood hazard factors equal to or <br />less than about 8.0 feet. With basement structures protection is assumed to eliminate all damage <br />below the protection level, whereas with raising damage still occurs to the basement since it still <br />exists below the elevation raised. At flood hazard factors of approximately 8,0 feet protection <br />becomes less effective than raising because the damage caused by immediate inundation begins <br />to outweigh the protection of basement property. In other words, the reason protection <br />reduced damage more than raising is because of the reduction to basement damage, yet as the <br />flood hazard factor increases this reduction is offset by the increased damage caused by <br />immediate inundation which does not occur when a structure is raised. <br /> <br />TABLE A-3 <br /> <br />INDEX TO FIGURES AND TABLES WHICH SHOW DAMAGE REDUCED <br />BY SELECTED MANAGEMENT ADJUSTMENTS <br /> <br /> Figu res Tables Tables <br />Management Adjustment (1970 FIA Data) (1970 FIA Data) (1974 FIA Data) <br />Raising Structure 3 feet 23 through 26 A-4 A-9 <br />Raising Structure 5 feet 27 th rough 30 A-5 A-10 <br />Protecting Structure 3 feet 31 through 34 A-6 A-11 <br />Protecting Structure 5 feet 35 through 38 A-7 A-12 <br />Removing Structure and 39 through 42 A-8 A-13 <br />Contents from Flood Hazard <br />Area <br /> <br />References <br />1. U.S. Department of Housing and Urban Development, "Flood Hazard Factors, Depth- <br />Damage Curves, Elevation-Frequency Curves, Standard Rate Tables" Federal Insurance <br />Administration, September 1970. <br />2. U.S. Army Engineers, "Technical Report on Representative Flood Damage to Residential <br />Properties", Huntington District, Unpublished Report, 1977. <br />3. U.S. Army Engineers, "Expected Annual Flood Damage Computation: Users Manual", <br />Computer Program 761-X6-L7580, The Hydrologic Engineering Center, June 1977. <br />4. MacFadyen, D. J., "Flood Insurance Rate Calculation Computer Program", Unpublished <br />report prepared for the Federal Insurance Administration, 3 April 1974. (Sections 7.1 and 7.2 <br />contain the depth-damage data used to compute flood insurance rates). <br />5. U.S. Army Engineers, "Study of Relationships of Flood Depth vs Flood Damage to Contents <br />in Residential and Commercial Categories", Civil Works - Planning Division, Project Analysis <br />Task Group, Technical Paper No.2, 1974. <br /> <br />A-12 <br /> <br />