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<br />study reach and generally flood the entire width of the lowlying alluvial <br />deposit along the river. The floodplain is very simi liar to that reported in <br />the Corps' Study (Reference 3) even vlith the Reese Lake Dik,o failure, <br /> <br />Map Sheets 2 and 3 al:;o show the estimated channel capacity in several <br />locations in terms of discharge and estimated flood frequency (shown in the <br />double box).. AlsoPT~Y!~E!donthe maps are estimated deptbs~Qf flooding in the <br />,overb.anka.r~ for variou:; flood events. This information Ciln be readily used-lo <br />predict when the channel capacity might be exceeded and to what extent flooding <br />is expected. This informstion is especially useful in determining which areas <br />are more susceptible to flooding for any given d'ischarge. <br /> <br />./' <br /> <br />',~ ,- <br />" <br />\ -' '.' <br />" <br />;"" <br /> <br />c:,!. \ <br /> <br />FLOOD EXTENT AND DAMAGE REVIEW <br /> <br />Map Sheets 2 and 3 show estimated channel capacity, floodplain limits for the <br />10-, 100-, and SOO-year events, and estimated depth of flooding for various <br />discharges and storm frequencies. Major areas of developm,"nt where many units <br />are affected by flooding have been identified on the maps and labeled as Area A, <br />Area B, Area C, and Area D. For these areas, the extent of flooding is shown <br />ranging from the lO-year floodplain to the SOD-year floodplain. The estimated <br />flooding depths for these areas are shown on the maps and can be used to <br />identify priority areas for improvements. This type of flooding information can <br />al so be used to determinl~ the extent of emergency action needed in each area. <br />For example, evacuation of a subdivision may not be necessa:ry if predicted flood <br />flows will only cause shallow flooding in that location. On the other hand, <br />flood depths for the same river flows may cause extreme flooding in a different <br />area, and evacuati on p roc,~dures wou 1 d be necessar'y, <br /> <br />A summary of properties in the floodplain was assemb'led to be used as a guide <br />for help in determining damages for certain locations throughout the study <br />reach. This table can be used as a tool in determining where improvements are <br />needed, the extent of th,~ improvement, and the priority of the improvement. <br />Table 3 shows a summary of properties affected by various flood events. <br /> <br />5 <br />