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• ESTIMATE OF FLOOD CHARACTERISTICS FOR MUNGER CREEK AT <br />ROAD CROSSING (72" CULVERT) BELOW WASTE ROCK DISPOSAL SITE; <br />MUNGER CREEK DRAINAGE BASIN, GARFIELD COUNTY, COLORADO <br />Procedure for ungaged sites with streams located entirely in <br />one flood - characteristic region: <br />1 - Identify flood region: Southern Plateau (From Figure 2) <br />2 - Select equations for peak discharges and depths of selected <br />recurrence - interval floods: See Table 4. <br />3 - Compute basin and climatic parameters required for 3. <br />Drainage Area A = 7.Smi2 (planimetered) <br />4 - Solve Equations: <br />• Peak Discharge of <br />RI Floods <br />Q10 = 59.7 (7.5)•709 = 249cfs <br />Q50 = 89.1 (7.5)•709 = 372cfs <br />Q100 = 103 (7.5)'710 = 431cfs <br />Q500 - 137 (7.5)'713 = 576cfs <br />Depths of RI Floods <br />D10 = 1.25 (7.5)•261 = 2.1 ft <br />D50 = 1.54 (7.5)•254 = 2.6 ft <br />D100 - 1.64 (7.4)•254 = 2.7 ft <br />D500 = 1.98 (7.5)•239 = 3.2 ft <br />STD Error, of Estimate ~ <br />Average Ranqe <br />47 +58 to -36 <br />50 +62 to -38 <br />53 +66 to -40 <br />65 +84 to -46 <br />25 +28 to -22 <br />34 +40 to -28 <br />36 +42 to -30 <br />44 +53 to -35 <br />Reference: CWCB Technical Manual No. 1, 1976 <br />• <br />