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Return Frequency - Depth in Inches <br /> <br /> Duration 5 year 10 year 25 year 100 year <br /> 5 min. .31 .38 .46 .55 <br /> 30 min. .55 .68 .82 .98 <br /> 1 hour .73 .88 1.05 1.25 <br /> 24 hours .34 1.57 1.81 2.10 <br /> Source: Metcalf & Eddy, 1975 <br />c) Snowpack Characteristics <br /> Normal snow depths, dens ities, and water conten ts estimated <br />• for the U pper Parachute Creek basin are summari zed below: <br /> Date Depth, in. Density, 8 Water Content inc. <br /> 12/1 10 20 2.0 <br /> 1/1 20 24 4.8 <br /> 2/1 28 26 7.3 <br /> 3/1 28 32 9.0 <br /> 4/1 10 40 4.0 ~ <br /> Source: Metcalf & Ed dy, 1975 <br /> <br /> K-4 <br />