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DEFINITIONS <br />Emergency. Is a sudden, generally unexpected event which does or could do harm to people, the environment, <br />resources, property or institutions. <br />Flood. A flood is an inundation of land not normally covered by water and that is used or is usable by man. A <br />flood has two essential characteristics: (1) The inundation is temporary; and <br />(2) The land is adjacent to or inundated by the overflow from a river, stream or lake. <br />Flood Control Project. A flood control project is any project which was designed and constructed to have <br />appreciable and dependable affects in preventing damages from flood events. Levees are examples of flood <br />control projects. <br />Level of Protection. The level of protection provided by a levee is a measurement of the magnitude of a flood <br />for which the levee is designed to protect from. For example, if a levee has a 25 -year level of protection it will <br />not be overtopped by a flood which has a magnitude of one which has the probability of occurring only once <br />every twenty-five years. (A twenty-five year flood has a 4% probability of occurring every year.) <br />Primary or Main Levee. A dile or embankment, generally constructed close to the banks of a stream, lake or <br />other body of water intended to protect the landside from inundation or to confine the stream now to its regular <br />channel. <br />Public Law 84-99. Public Law 84-99 is the di scretionmy authority given to the Corps of Engineers by Congress <br />to act and react to emergencies caused by floods, contaminated water sources, drought, or dam failures. This <br />authority allows the Corps to repair and/or rehabilitate any qualified flood control project (Levee) whether it is <br />federally constructed or privately owned. <br />Secondary Levee. A secondary levee is a levee constructed near, or tied into the main levee (riverward or <br />landward) and which provides a lesser degree of flood protection than the main system. <br />