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<br />interviewer who consistently overestimates structure values). Concise <br /> <br />delineation of study objectives and data needs, careful consideration of <br /> <br />questionnaire design and sampling plans, and the provision of training and <br /> <br />supervision to interviewers can minimize the potential for obtaining <br /> <br />biased results. <br /> <br />The degree of precision for floodplain inventory depends on the <br /> <br />resources available for the project, the availability of data, and the <br /> <br />precision of other study components, Accurate appraisals and elevation in <br /> <br />computing flood damage estimates, and considerable effort, should go into <br /> <br />making and verifying estimates. Stratification of floodplain properties <br /> <br />(e.g., by building use, construction type, and elevation) before sampling, <br /> <br />can generally provide increased precision for a given sample size needed <br /> <br />to provide a specified level of precision. <br /> <br />VAllIE OF STRUCTURE <br /> <br />Building values should be evaluated as an estimate of depreciated <br /> <br />replacement value of the structure. Outside building values and land <br /> <br />values should be considered separately, Estimating actual replacement <br /> <br />values, determining an expected life, and depreciating by deterioration <br /> <br />can be a time-consuming and costly job, If resources are limited, <br /> <br />depreciated replacement values of buildings can be approximated by market <br /> <br />values, Market values can be obtained from the following sources of <br /> <br />information: <br /> <br />1) Real estate assessment data. Nearly every municipality and <br /> <br /> <br />county in the United States levies a real estate tax, Property values are <br /> <br /> <br />assessed as a percent of market value, The appraisals are usually divided <br /> <br />V-26 <br />