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• ~ possible. The stage-discharge relationship of the emergency spillway <br />inlet was calculated using SEDIMOT II, while the stage-discharge <br />relationship of the principal spillway inlet was calculated using the <br />orifice flow equation below: <br />~) <br />Q C Ao 2gH <br />where: <br />Q = discharge in cfs <br />C coefficient of discharge = 0.6 <br />Ao = cross sectional Area = 0.0055 ft.2 <br />g = gravitational constant = 32.2 ft/sec.Z <br />H = head (ft.) = 0 to 8.0 ft. (above the opening) <br />Elevation 0 cfs <br />5694.0 0.0 <br />5696.0 0.04 <br />5698.0 0.05 <br />5700.0 0.06 <br />5701.0 0.07 <br />5702.0 0.07 <br />Table 7 is a summary of the spillway data. <br />TABLE 7 <br />Spillway Data Summary <br />Sediment Pond 005 <br /> <br />Principal Spillway: Type <br />~ Riser Inlet (CMP) <br />Orifice <br />Diameter 1.00-inch <br />Inlet Elevation. 5694.0 <br />10-year, 24-hour Peak <br />Storage. 5699.04 <br />Emergency Spillway: Type Drop Inlet (CMP) <br />Barrel Diameter 18.000-inch <br />Riser Diameter 18.000-inch <br />Length of Barrel 80.000-ft <br />Vertical Head Drop 4.000-ft. <br />Entrance Loss Coef. 1.000 <br />Bend Loss Coef. 0.500 <br />Wier Coef. 3.100 <br />Orifice Coef. 0.600 <br />10 <br />