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• <br />• <br /> <br />Table 23-11 <br />OUTLET NORKS DESIGN - POND L <br />Primary Outlet <br />Number of orifices 2 <br />Elevation of orifices 8,271.30 <br />Diameter of orifices (inches) 3.00 <br />Emergency Spillway <br />Conduit Diameter (inches) 18 <br />Riser Diameter (inches) 24 <br />Length of Pipe (ft) 90 <br />Manning's Roughness Coefficient, n 0.025 <br />Invert Elevation (ft) 8,275.28 <br />Vertical Head Drop (ft) 11.32 <br />Surface Water Primary Outlet Emergency Spillway <br />Elevation Discharge Discharge <br />(ft) (cfs) (cfs) <br />8.271.1 0.00 0.00 <br />8.271.5 0.21 0.00 <br />8.271.9 0.37 0.00 <br />8.272.3 0.47 0.00 <br />8.272.7 0.56 0.00 <br />8.273.1 0.63 0.00 <br />8,273.5 0.70 0.00 <br />8.213.9 0.76 0.00 <br />8,274.3 0.82 0.00 <br />8.274.7 0.87 0.00 <br />8.275.1 0.92 0.00 <br />8.275.3 .- 0.95 <br />8.275.5 -.- 1.49 <br />8.275.7 -.- 4.56 <br />8.275.9 -.- 8.60 <br />23-149 <br />