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<br />I <br />I <br />I: <br />I <br />1 <br />I <br />I <br />I <br />I <br />I- <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />TABLE 2 <br /> <br /> <br />.....-.......'..'...:.-.......'.-.-.'.',-.......:...-.-.-.-.....-....... <br />....... ............................ <br />.......... ......... ................ <br />....... ...-........................... <br />....... ................. . ........ <br />........D.. .ri:;(:IN.... Ao'jiij... <br />:>> :'..~ : ::: :h:v~t>~~ <br />...............;......................-...:.............'..........-.. <br />.... .-,............,............... <br />.....ARE...... ....A.......(. D...j\;..........)..... <br />...... . d........ ."_, <br />~:r;::::.;::.:::.:.:.;:;:;.:..:\;.:::.i~.:::::.:::/::..:~j: <br /> <br />Cl <br />C2 <br />C3 <br />C4 <br />C5 <br />C6 <br />C7 <br />C8 <br />C9 <br />CI0 <br />Cll <br />C12 <br /> <br />ABOVE RIFLE CR <br />BELOW RIFLE CR <br />ABOVE PARACHUTE CR <br />BELOW PARACHUTE CR <br />DEBEQUE GAGE <br />BELOW ROAN CR <br />CAMEO GAGE <br />BELOW PLA TEAV CR <br />PALISADE GAGE <br />BELOW GUNNISON RIVER <br />FRUlTA, FEMA D/S STUDY LIMIT <br />ABOVE SALT WASH <br />STATELINE GAGE (1.5 MI VIS) <br />Sources 0 Dramage Areas <br /> <br />6730 mi2 <br /> <br />a <br /> <br />cn <br /> <br />6930 mF a <br />7130 mF b <br />7330 mF b <br />7370 mi2 c <br />7895 mF b <br />8050 mi2 c <br />8700 mi2 a <br />8753 mF c <br />16853 mi2 b <br />17100 mi2 a <br />17429 mF b <br />17843 mF c <br /> <br />a Determined from published US Army Corps of Engineers and FEMA information <br />b Determined from planimetering and published tributary information <br />C USGS gage information <br /> <br />Figure 4 shows the study reach and each of the hydrologic analysis points listed in Table 2. <br /> <br />2.5 Flood Characteristics <br /> <br />Major flooding in the Colorado River basin has been primarily the result of rapid snowmelt which <br />typically begins in late April. Snowmelt flooding can continue into early July. Flooding can also <br />occur from rainfall on snowmelt in late winter or early spring. Due to the small areal extent and <br />limited duration ofthunderstonns, they do not typically constitute a major flood threat on streams <br />as large as the Colorado River. They do, however, pose a problem for some of the smaller <br />tributaries in the Colorado River basin. . <br /> <br />Snowmelt flooding is characterized by moderate peak flows, large volume of runoff, long <br />duration, and diurnal fluctuation of flow~ Flooding from general rainfall alone, though <br /> <br />7 <br />