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<br />Criteria for flood way administration vary greatly, from limits on the surcharge <br />permitted between 0.0 and 1.0 foot to much more complex velocity limits and <br />encroachment limits up to the edge of a specified frequency event such as the <br />1 a-year flood. <br /> <br /> <br />. <br /> <br />The following headings correlate to the Floodway Decision Tree Flow Chart (Figure 1); <br />following each heading is an explanation of the step's objective and why it is necessary. <br /> <br />1. Identifv the Proper Administrative Authoritv <br /> <br />The majority of the nation's flood ways were developed for communities under the <br />NFIP. The NFIP regulations are quite specific about community or state <br />jurisdiction over floodway changes. They allow for maximum community or state <br />jurisdiction as long as the requirements of these entities meet or exceed the <br />minimum Federal standard. In many instances, community standards are more <br />stringent than the Federal and, in fact, may administer a wider flood way than <br />that shown on the NFIP maps. This would necessitate compliance with both <br />community and FEMA requirements if both flood ways are affected. <br /> <br />When flood ways are administered by communities at the minimum Federal <br />standard, the rules for changes are well documented. These requirements are <br />found in 44 CFR Chapter 1 Part 65.7, as well as in the "Conditions and Criteria <br />for Floodway Revisions," available from FEMA. <br /> <br />. <br /> <br />Quite often, regional authorities or multiple communities oversee floodways and <br />have special requirements for changes; in addition, some states may also have <br />special requirements. There are also floodways that may require involvement of <br />several Federal agencies as well as the state and communities. These are <br />generally found to be associated with the operations of major Federal flood <br />control and river regulation projects. <br /> <br />2. Evaluation of the Acceptabilitv of the Original Floodwav Model <br /> <br />. <br /> <br />Having established the administrative authority and determined the rules for <br />evaluation of changes, we can begin to assess the floodway changes we desire. <br />Two distinctly different paths are available for this purpose. <br /> <br />2 <br />