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• ESTIMATE OF FLOOD CHARACTERISTICS FOR MUNGER CREEK <br />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 <br />selected recurrence-interval floods: See Table 4. <br />• <br />3 - Compute basin and climatic parameters required for 3: <br />Drainage Area A = 6.5mi2 (Planimetered) <br />4 - Solve equations: <br />Peak Discharge of RI Floods <br />410 - 59.7 (6.5)'709 = 225cfs <br />450 - 89.1 (6.5)'709 = 336cfs <br />4100 = 103, (6.5)'710 = 389cfs <br />4500 - 137 (6.5)'713 = 520cfs <br />Depths of RI Floods <br />D10= 1.25 (6.5)•261 = 2,0 ft <br />D50 = 1.54 (6.5)•254 = 2.5 ft <br />D100 - 1.64 (6.5)'254 = 2,6 ft <br />D500 = 1.98 (6.5)•239 = 3.1 ft <br />STD Error, ~ <br />Average Range <br />41 +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 />