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<br />FUTURE FLOODS <br /> <br />This section of the report discusses the Standard Pro- <br /> <br /> <br />ject Flood and the Intermediate Regional Flood on Fountain Creek in <br /> <br /> <br />the vicinity of Pueblo, and some of the hazards of great floods. <br /> <br /> <br />The Standard Project Flood represents the rElasonable upper Limits <br /> <br />of expected flooding. Floods of Intermediate Regional Flood size <br /> <br /> <br />may be expected to occur more often, but thElY will not be as severEl <br /> <br />as the infrequent Standard Project Flood. <br /> <br /> <br />Large floods have occurred in the past on the Arkansas <br /> <br />River, Fountain Creek, and other tributaries in the general geo- <br /> <br />graphical and physiographical region of Pueblo. Heavy storms, sim- <br /> <br /> <br />ilar to those causing past floods, undoubtedly will recur over the <br /> <br /> <br />Fountain Creek watershed to cause future floods of similar or greater <br /> <br /> <br />size at Pueblo. In any determination of future' floods which may oc- <br /> <br /> <br />cur ~n a given stream, it is desirable to consider all storms and <br /> <br /> <br />floods that have occurred in the region on "Iat,,,o-sheds "lith similar <br /> <br /> <br />topography, watershed cover, and physical characteristics. <br /> <br />Determination of Intermediate Reqional Floo~ <br /> <br /> <br />The Intermediate Regional Flood is defined as having <br /> <br /> <br />an average frequency of occurrence of once i.n 100 years, although <br /> <br /> <br />it may occur in any year and possibly even in successive years. <br /> <br />This flood is calculated from statistical analyses of streamflow <br /> <br /> <br />records available for the watershed under study and analyses of <br /> <br /> <br />rainfall and runoff characteristics of other streams in the "general <br /> <br /> <br />region of the watershed." As calculated for the Pueblo area, the <br /> <br /> <br />Intermediate Regional Flood represents a major flood which, althou~Jh <br /> <br /> <br />less severe than the Standard Project Flood, would be more severe <br /> <br /> <br />than the June 1965 flood on Fountain Creek i.n practically all <br /> <br />aspects. <br /> <br />32 <br />