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<br />. select the most cast-effective tools. <br /> <br />4. Although fE~A regulations do <br />tools, several communities have used <br /> <br />not require whole-fan <br />channels, levees, and <br /> <br />or debris basin to control <br />decisions include: <br /> <br />flooding. <br /> <br />The reasons for such <br /> <br />. protection of existing structures; <br />. maximization of developable land; <br />. protection of streets, utilities and landscape; <br />. lower overall cost; and <br /> <br />. <br /> <br />availability of federal or state funding <br />structural measures. <br /> <br />for <br /> <br />5. <br /> <br />Local tools such as <br /> <br />local levees. <br /> <br />street orientation, <br /> <br />and elevation of structures appear to be most appropriate <br />when ,existing and projected development densities are low to <br />moderate. Such measures make incorporation of 1100d control <br />costs into subdivision construction costs possible. <br /> <br />6. When individual structures or small blocks of homes are <br />placed within existing subdivisions, flood protection <br />systems for these homes must be coordinated with existing <br />tools. In general, elevation on piles should be used to <br />avoid blockage or diversion of floodwaters and increased <br />downstream damage. <br /> <br />7. The following applications of management tools are <br />recommended for subdivisions in each hydraulic zone on the <br />fan and for the placement of single structures. <br /> <br />Channelized Zone <br />. Development <br />measures are <br /> <br />prohibited <br />implemented. <br /> <br />unless <br /> <br />whole-fan <br /> <br />20 <br />