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• Table 23-15 <br />OUTLET NORKS DESIGN - POND J <br />Primary Outlet <br />Number of orifices 2 <br />Elevation of orifices 8,155.2 <br />Diameter of orifices (inches) 3.00 <br />Emergency Sp111way <br />Conduit Diameter (lnches) 18 <br />Riser Diameter (inches) 24 <br />Length of Pipe (ft) 70 <br />Manning's Roughness Coefficient, n 0.025 <br />Invert Elevation (ft) 8,161.80 <br />Vertical Head Drop (ft) 8.80 <br />• Surface Slater Primary Outlet Emergency Spillway <br />Elevation Discharge Discharge <br />(ft) (cfs) (cfs) <br />8,155.2 0.00 0.00 <br />8,155.6 0.30 0.00 <br />8,156.0 0.42 0.00 <br />8,156.4 0.52 0.00 <br />8,156.8 0.60 0.00 <br />8,151.2 0.67 0.00 <br />8,157.6 0.73 0.00 <br />8,158.0 0.79 0.00 <br />8.158.4 0.85 0.00 <br />8,158.8 0.90 0.00 <br />8,159.2 0.95 0.00 <br />8,159.6 0.99 0.00 <br />8,160.0 1.04 0.00 <br />8,160.4 1.08 0.00 <br />8,160.8 1.12 0.00 <br />8,161.2 1.16 0.00 <br />8,161.6 1.20 0.00 <br />8,162.0 -.- 1.74 <br />8,162.2 .- 4.93 <br />8,162.4 9.05 <br />• <br />8,162.5 -:_ 11.29 <br />23-147 <br />