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<br />FUTURE FLOODS <br /> <br />Floods of the same or larger magnitude than those that <br />have occurred could occur in the future. To determine the flood <br />potential of the study area, the 10-year, 50-year, 100-year, and <br />SOD-year floods were analyzed. The results of this analysis are <br />presented in this report as a means of demonstrating the effects <br />of large floods. <br /> <br />Discharge magnitudes for floods analyzed In this report <br />were based upon an analysis of stream gaging data at the U.S.G.S. <br />stream gages located near Drake and La Sal Ie for the Big Thompson <br />River and near Berthoud for the Little Thompson River. Informa- <br />tion on these stream gages was presented in table 2. Because <br />there are no streamflow gaging records between the La Salle gage <br />and the upstream limit of A~ch study, synthetic dlscharqe- <br />probability relationships were developed for the intervening <br />drainage area using unit hydrographs and flood routing techniques <br />and rainfal I probabilities from U. S. Weather Bureau Technical <br />Publication No. 40. The fol lowing table presents discharge data <br />used in this report. <br /> <br />22 <br />