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<br />forecast, it Was assumed that the bridge structures would stand <br /> <br /> <br />intact. Some clogging is to be expected which may change estimated <br /> <br />flood 11mi ts. <br /> <br /> <br />The Standard Project Flood profile for Fountain Creek <br /> <br /> <br />averages about 7 feet higher than the Intermediate Regional Flnod <br /> <br /> <br />along most of the stream. The June 196,; flood hei~lhts averaged <br /> <br />about 3 feet lower than the Intermediate Regional Flood. <br /> <br />Figures 8 through 10 show the heights that would be <br /> <br /> <br />reached by the Standard Project Flood and the InteI'mediate Regional <br /> <br /> <br />Flood an facilities presently existing within the Fountain Creek <br /> <br />flood plain in the study reach. <br /> <br />Velocities. Rates of Rise, and Durajion <br /> <br /> <br />Water velocities during floods depend largely upon the <br /> <br /> <br />size, shape, and slope of the streambed, and the condition of the <br /> <br /> <br />channel, all of which vary on di fferent streams and at di, fferent <br /> <br /> <br />locations on the same stream. <br /> <br />Tables 8 and 9 show the maximum velocities that would <br /> <br /> <br />occur in the main channel and overbank'areas of Fountain Creek <br /> <br /> <br />during the Intermediate Regional Flood and Standard Project Flood, <br /> <br /> <br />respectively. <br /> <br />TABLE 8 <br /> <br />INTERMEDIATE REGION8L FLOOD <br /> <br />MAXIMUM VELOCITIES <br /> <br />FOUNTAIN CREE~, <br /> <br />Location <br />Mile <br /> <br />lYIaxim~m <br />Channel <br />ft. per sec. <br /> <br />Veloci ti,,,s <br />Overbank <br />fto per sec. <br /> <br />6.78 <br /> <br />21.9 <br /> <br />5.2 <br /> <br />0.23 <br /> <br />17.9 <br /> <br />7.7 <br /> <br />37 <br />