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<br />available in the Emergency Program and for coverage on new buildings <br />vary according to the potential for flood damage to your house. <br /> <br />B. Keeping Water Away <br /> <br />Small levees and floodwalls can <br />be built around one or more <br />houses to keep low flood waters <br />away. A house need not be com- <br />pletelyencircled. A wall <br />could be built on the low sides <br />and tied into existing high <br />ground or to dry floodproofed <br />walls of the building (see 1.0., <br />below on floodproofing walls). <br /> <br />(1-1161-1 CioWLNO) <br />w,~ ~~"e4 <br /> <br />~// f>UILDlNCo "M <br /> <br /> <br />(LOW GtFOlJNO) <br /> <br />~ <br /> <br />Levees: Levees made of local or borrow dirt are probably the cheapest <br />way to keep floodwaters off a site. Key things to check are: <br /> <br />1. Do you have enough room for a levee? The sides of a clay <br />levee should have at least a 2:1 slope. A sand levee re- <br />quires a 3:1 slope. The base should be even wider to allow <br />for a gradual slope which WOUld be easier to maintain and <br />less of a visual disruption to your landscape. <br /> <br />2. Being made of dirt, a levee is highly susceptible to erosion and <br />scour. Gradual sloping and a good ground cover should <br />minimize this. In areas where past flooding has shown that <br />currents wash away ~round cover, well anchored railroad ties <br />or boards, rip rap (broken rocks) or some other protection <br />measure should be used. <br /> <br />3. How permeable is the'dirt? Long standing water will seep <br />through it. It will take longer to permeate clay than sand <br />or gravel. Check with your Soil and Water Conservation <br />District or a soil engineering firm for more information. <br />You can find the District phone number by looking under <br />your county's name in the County Seat's telephone book. <br /> <br />3 <br />