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<br />I <br />I <br />, I <br />I <br />I <br />I <br />I <br /> <br />2.3 Warning <br /> <br />The stream had been flowing high following a diurnal cycle <br /> <br />for the week prior to June 18, 1983 so there was ample warning. <br /> <br />The daily peaks were occuring late at night and lasting approxi- <br /> <br />mately 3 hours. The National Weather Service issued a flood <br /> <br />, ~ r <br /> <br />watch for Clear Creek County on June 19 which was changed to a <br /> <br />flood warning on June 20, 1983. This warning was finally lifted <br /> <br />, ,..,,;. <br /> <br />on July 4, 1983. <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />2.4 Flood Magnitude <br /> <br />During the night of June 18, water began to overflow the <br /> <br />bank in the vicinity of Woodward and Tregay Streets. The peak <br /> <br />approximately 600 cfs a~ 11:00 p.m. on June 20, 1983. From the <br />frequency-discharge relationship, this corresponds to a magnitude <br /> <br />,\.'-- <br />", I '~''- <br />'-\'. <br />\.. \ . \.', <br />, } <br /> <br />discharge in Clear Creek at Silver Plume was estimated to be <br /> <br />of about a 7-year flood. <br /> <br />(See appendix.) The strip chart from <br /> <br />the Lawson gage on Clear Creek from June 15 to July 4, a daily <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />temperature graph for the same period and a <br /> <br />li~t of d~~charge <br />7re, e.,-; "-trHc,,vO- <br />8t'epheff' S,t,E'ph"-tlS are <br /> <br />calculations at Silver Plume provided by Mr. <br /> <br />included in the appendix. <br /> <br />2.6 Emergency Response <br /> <br />The Town of Silver Plume should be commended for their <br /> <br />efforts during the flood fight. Mayor Peter Kenney and town <br /> <br />-6- <br />