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<br />C," ~ <br />u~..J7 <br />-. <br /> <br />Table 7 <br />STUDY REACHES <br />LOWER SOUTH PLATTE RIVER <br /> <br />study Reach <br /> <br />River Milea~e Units <br /> <br />Geo~aphic Extent <br /> <br />1 <br />2 <br />3 <br /> <br />4 <br /> <br />191. - 173.0 <br />173.0 - 106.5 <br />106.5 - 77.8 <br /> <br />77.8 - 4.1 <br /> <br />Bijou Creek to Cooper Bridge <br />Cooper Bridge to Red" Lion <br />Red Lion to 5 miles down- <br />stream from the State line <br />5 miles downstream from the <br />State line to North Platte <br />bridge <br /> <br />FLOOD HAZARD AREAS <br /> <br />The flood hazard area along the Lover South Platte River <br />contains approximately 168,000 acres. Damages were evaluated for <br />the areas that would be inundated by a standard project flood <br />(SPF). Discharge-area flooded relationships were developed for <br />each reach by use of recent flood plain survey data. The areas <br />sUbject to flooding in each study reach for selected probabilities <br />are presented in table 8. A description of the areas subject to <br />fl.ooding is given in the following paragraphs. <br /> <br />Table 8 <br />PROBABILITY-FLOODED AREA RELATIONSHIPS <br />(areas in acres) <br /> <br />study Reach <br />1 <br />2 <br />3 <br />4 <br />Total <br /> <br />20 <br />3,950 <br />14,400 <br />5,900 <br />15.200 <br />39,450 <br /> <br />Probability of Floodin~ in Percent <br />10 4 2 1 <br />5:100 6:350 7:500 8,800 <br />21,500 26,100 29,900 34,500 <br />10,500 12,700 14,350 16,450 <br />~5.600 33.800 38.800 44.500 <br />2,700 78,950 90,550 104,250 <br /> <br />SPF <br />14,400 <br />54,800 <br />26,200 <br />72.600 <br />168,000 <br /> <br />15 <br />