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<br />FL<JOD HISTORY <br /> <br />The Uncompahgre River has a long history of flooding. <br /> <br />Flooding along the lower Uncompahgre River usually results from <br /> <br />rap id snowmelt of an above average snowpack from mid-~lay through <br /> <br />early July, but may also result from runoff of general rain, <br /> <br />particularly in the Delta area. <br /> <br />Historically, floods on the Uncompahgre River have disrupted <br /> <br />highway and rail traffic, damaged and destroyed irrigation <br /> <br />diversion structuresr eroded farmlands, damaged and destroyed <br /> <br />crops, eroded channel banks and roadVlay embank:ments, depos i ted <br /> <br />sand, silt, and debris on croplands, ~lundated structures, and <br /> <br />destroyed natural vegetation. Flood flows on the river have been <br /> <br />recorded by the gaging stations at Colona and Delta. The 1984 <br /> <br />peak flows were 3920 cfs and 5750 cfs, respectively, and occurred <br /> <br />on May 22nd and May 15th. <br /> <br />Table 1 <br />PEAK FLOWS OF HISTORIC~L FLOODS <br />(In cubic feet per second) <br /> <br />Year <br /> <br />Colona GagEO <br /> <br />Date <br /> <br />1921 <br /> <br />5,140 cfs <br /> <br />June 13-14 <br /> <br />1927 <br /> <br />3,400 cfs <br /> <br />June 28 <br /> <br />1938 <br /> <br />3,390 cfs <br /> <br />June 22 <br /> <br />-3-- <br />