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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 />"". ' <br /> <br />. <br /> <br /> <br />" <br />'" <br /> <br />l't\ dO~i'$irc <br />'c . .' '''''~'' <br />Ne~. ..7 MeXI COi~" hi,"". <br />":~'~"}"__':w,.~-,.J'" ., .t..'h\. <br /> <br /> <br />'. <br /> <br />.". <br /> <br />~... .' '\ I~ <br />-{~I .:.&. <br />'~.' 'V:. ~_; <br />. - <br />.. . <br /> <br />.~ <br />.. <br /> <br />Figure 1.12 - State of Colorado NEXRAD <br />Radar Image July 21". 2002 at 1 0:00PM. <br /> <br />Figure 1.13 -Map of the Town of Deckers In <br />Relation to the State of Colorado. <br />Map courtesy of Mapquest webslte. <br /> <br />Hvdroloeic and Hvdraulic Conclusions <br /> <br />There was no flooding associated with any streams or rivers in the studied area. Any <br />damage was due to the increased intensity of mudslides and overland flow from the <br />effects ofthe Hayman fire. <br /> <br />According to information obtained from Mapquest, Deckers lies near the confluence of <br />Horse Creek and the South Platte River at an elevation of approximately 6400 feet. <br />Cheesman Reservoir is located just to the southwest of Deckers along the South Platte <br />River. The South Platte flows to the north and is flow-controlled by the reservoir. <br /> <br />Hydrologic analyses were performed using available baseline data from NOAA Atlas 2 in <br />order to generate Intensity Duration Frequency, or IDF, curves for rainfall events within <br />the Deckers area. Using the varying amounts of rainfall mentioned in the Storm <br />Characteristics section of this report, and the duration of the storm, one could estimate the <br />frequency of the specific events. The results of this analysis are shown in Table 1.1 <br />below. <br /> <br /> <br />tudied Duration (hours) <br /> <br />- YR Total Precipitation in.) <br /> <br />O-YR Total Preci itation (in.) <br /> <br />100-YR Total Preci itation in. <br />Total Event Precipitations As <br />Reported (in.) <br /> <br /> <br />0.60 <br /> <br />0.14 <br /> <br />0.06 <br /> <br />21, 2002 Storm <br /> <br />1.5 <br />0.79 <br />1.93 <br />2.20 <br />2.00' <br /> <br />0.33 <br /> <br />0.12 <br /> <br />Est. Event Fre uenc ( r) Less Than 2 Less Than 2 <br />· ~ Outlying data point not included in fi-equency estimation. <br /> <br />ICON Engineering, Inc <br /> <br />5 <br /> <br />January 2003 <br />