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<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 />I <br />I <br />I <br />I <br />I <br /> <br />uncommon on the Colorado River, is characterized by high peak flows and moderate duration of <br />floodflows. Thunderstorms result in high peak flows, short duration of flows, and small volume <br />of runoff. Historically, snowmelt has caused the greatest flooding on the Colorado and Gunnison <br />Rivers with augmentation from rain adding to some historical peak flows. The largest known <br />snowmelt flood on the Colorado and Gunnison Rivers was in July, 1884 with an estimated flow <br />at Fruita of 125,000 cfs. Other significant flood events occurred in 1917, 1920, 1921, 1935, <br />1952, 1957, 1983, and 1984. The 1984 flood of 70,000 cfs at the State Line was at a frequency <br />of slightly less than once in 50 years. <br /> <br />8 <br />