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<br />. <br /> <br />· Vaccinating residents for tetanus <br />· Clearing streets , <br />· Cleaning up debris and garbage. <br /> <br />The plan also should identify which agencies will be responsible for carrying out <br />these measures. . Usually they are the police, sheriff, or public health authorities. <br />To f"IIl!l Out More .. .. Obtain assistance and information about post-flood <br />'activities from local, County,. and state emergency management offices. <br /> <br />Structural Projects <br /> <br />Structural projects are used to prevent flood waters from reaching properties. <br />These measures are .structural. because they require building structures to control <br />the flow of water. They can be grouped into three types: <br /> <br />· Levees and tloodwalls <br />· Reservoirs and diversions <br />· Channel and drainage modifications. <br /> <br />Most structural projects are very expensive. They have other shortcomings, too: <br /> <br />· They disturb the land and disrupt natural water flows, often destroying <br />habitats. <br /> <br />. <br /> <br />· They require regular maintenance that, if neglected, can have <br />disastrpus consequences. <br /> <br />· They are built to a certain flood protection level that can be exceeded <br />by larger floods, causing extensive damage. <br /> <br />· They can create a false sense of security, because people protected by <br />a structure often believe that no flood can ever reach them. <br /> <br />levees and fIoodwalls <br /> <br />Probably the best known structural measure is a barrier of either earth (levee) or <br />steel or concrete (floodwall) erected between the watercourse and the property to <br />be protected. Levees need considerable room to fit between the river and the area <br />to be protected. If space is a constraint, more expensive f100dwalls are used. <br />Levees and floodwalls should be set back out of the floodway so they will <br />not push flood waters onto other properties. Their design also should compensate <br />for the flood storage they will displace and for aCcess through or over the barrier. <br />To Find Out More .. .. The U.S. Army Corps of Engineers, the Natural <br />Resources Conservation Service, and state natural or water resources agencies can <br />provide information on construction criteria and funding assistance. <br /> <br />. <br /> <br />Reservoirs and diversions <br /> <br />Reservoirs and diversions control upstream water to reduce the amount that <br />reaches an area at one time. A reservoir holds high flows behind a dam or in a <br /> <br />23 <br />