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<br /> <br />for the Intermediate Regional and Standard Project Floods on the Colorado <br /> <br /> <br />and Gunnison Rivers in the study area. On the average, the water surface <br /> <br /> <br />elevation of the Standard Project Flood would be about one foot higher <br /> <br />than the Intermediate Regional Flood. <br /> <br />TABLE 3 <br />RATES OF RISE AND DURATION OF FLOODING <br /> <br />Flood <br /> <br />Maximum <br />Rate of <br />Rise <br />ft/hr <br /> <br />Duration of <br />of ( ) <br />Critical Sta!Je c <br />hrs <br /> <br />Height <br />of <br />Rls/a) <br />ft <br /> <br />Time <br />.of(b) <br />RIse <br />hrs <br /> <br />COLORADO RIVER AT MILE 1063.75 <br /> <br />Intermediate <br />Regional <br /> <br />Standard <br />Project <br /> <br />0.03 <br /> <br />2.9 <br /> <br />415 <br /> <br />475 <br /> <br />0.04 <br /> <br />3.4 444 <br />GUNNISON RIVER AT MILE 2.05 <br /> <br />552 <br /> <br />I ntermed I ate <br />Regional <br /> <br />Standard <br />Project <br /> <br />1.4 <br /> <br />0.07 <br /> <br />18 <br /> <br />36 <br /> <br />0.07 <br /> <br />2.0 <br /> <br />36 <br /> <br />180 <br /> <br />(a) Critical stage level (beginning of overbank f7.ow) to ma:cimum <br />floodflOlU level. <br />(b) Time period corresponding to height of rise. <br />(c) Period of time flooding is above critical stage. <br /> <br />PHOTOGRAPHS, FUTURE FLOOD HEIGHTS <br /> <br />The levels that the Intermediate Re!Jionaland Standard Project Floods <br />are expected to reach at various locations in the study area are Indicated <br />in the fol lowing photographs. <br /> <br />20 <br />