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Actual Peak Flow: <br />320 cfs x 151 acres .193 cfs say 200 cfs <br />acres <br />Mean Annual Event <br />Precipitation: SCS figures do not give mean annual precip. <br />Therefore, it is estimated from a plot of <br />precip. vs. recurrence interval. From plot <br />attached P24hr 2.33yr = 2.2 inches <br />Runoff: From table for CN = 80, Q (inches) = 0.69 <br />Actual peak: Similar to above <br />110 cfs/in x 0.69 in x 1.14 x 151 = 52 cfs <br />