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<br /> <br />. <br /> <br />FloodStaqe <br />The st~ge or elevation et whiCh overflow of the natural <br />banks of a stream or body of water begIns In the reach or erea In <br />WhICh the elevation Is measured. <br /> <br />Head Loss <br /> <br />The effect of obstructions, such 9S narrow bridge open- <br />Ings or buildIngs that limit the area through Which water must <br />flow, raIsing the surface of the water upstream from the obstruc- <br />tion, <br /> <br />. <br /> <br />Left Bank <br /> <br />The bank on the left side of a river, stream, or water <br />course, looking downstream. <br /> <br />RlqhtSank <br />The bank on the riqht side of " river, stream, or water <br />course 100kinq downstream. <br /> <br />10-Year, 50-Year, I OO-Year , SOQ-Year Flood <br />A tlood havIng a 10, 2, I, and ,2 percent probability, <br />respectively, of occurrence In any year or an ~verage frequency <br />ot occurren~ In the order of once In 10, ~O, 100, and 500-years, <br />respectively. Th",tl00<Jmayoccur.nenyy"",r. Itlsb9SOldon <br />~t"tl~tlr"l "n~ly~i~ nf ~tr"'amflnw rer.ord~ end enaly~ls of rain- <br />fall and runoff characteristics In the general raglon of the <br />watershed. <br /> <br />" <br />