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SEDCAD 4 for Windows <br />r,-.inhi 1008 _9Mn P-1. I Gh,uoh <br />Enhanced Perf. Riser <br />Riser <br />Riser Height <br />Diameter (in) <br />Barrel <br />Barrel Length Barrel Slope <br />(in) <br />Number of <br />Spillway Elev <br />Mannings n Holes per <br />(ft) <br />(ft) <br />(ft) (oho) <br />(ft) <br />Elev <br />18.00 3.90 <br />18.00 40.00 1.00 <br />0.0150 5,681.90 2 <br />Pond Results: <br />Peak Elevation: <br />5,683.20 ft <br />H'graph Detention Time: <br />2.57 hrs <br />Pond Model: <br />CSTRS <br />Dewater Time: <br />1.47 days <br />Trap Efficiency: <br />82.20% <br />Dewatering time is calculated from peak stage to lowest spillway <br />Elevation -Capacity -Discharge Table <br />Elevation <br />Area <br />(ac) <br />Capacity <br />(ac -ft) <br />Discharge <br />(S) <br />Dewater <br />Time <br />(hrs) <br />5,678.05 <br />1.348 <br />0.000 <br />0.000 <br />Top of Sed. Storage <br />5,678.25 <br />1.370 <br />0.273 <br />0.000 <br />5,678.50 <br />1.397 <br />0.619 <br />0.000 <br />5,678.75 <br />1.424 <br />0.972 <br />0.000 <br />5,679.00 <br />1.452 <br />1.331 <br />0.000 <br />5,679.25 <br />1.480 <br />1.698 <br />0.000 <br />5,679.50 <br />1.508 <br />2.071 <br />0.000 <br />5,679.75 <br />1.536 <br />2.452 <br />0.000 <br />5,680.00 <br />1.565 <br />2.839 <br />0.000 <br />5,680.25 <br />1.593 <br />3.234 <br />0.000 <br />5,680.50 <br />1.621 <br />3.636 <br />0.000 <br />5,680.75 <br />1.650 <br />4.045 <br />0.000 <br />5,681.00 <br />1.679 <br />4.461 <br />0.000 <br />5,681.25 <br />1.708 <br />4.884 <br />0.000 <br />5,681.50 <br />1.737 <br />5.315 <br />0.000 <br />5,681.75 <br />1.766 <br />5.753 <br />0.000 <br />5,681.90 <br />1.784 <br />6.019 <br />0.000 <br />Spillway #2 <br />5,682.00 <br />1.796 <br />6.198 <br />0.463 <br />21.20 <br />5,682.25 <br />1.828 <br />6.651 <br />3.026 <br />7.95 <br />5,682.50 <br />1.861 <br />7.112 <br />6.591 <br />2.40 <br />5,682.75 <br />1.894 <br />7.581 <br />7.845 <br />1.25 <br />5,683.00 <br />1.927 <br />8.059 <br />8.924 <br />1.30 <br />Spillway #1 <br />5,683.20 <br />1.954 <br />8.451 <br />12.392 <br />1.15 <br />Peak Stage <br />5,683.25 <br />1.961 <br />8.545 <br />13.220 <br />5,683.50 <br />1.995 <br />9.039 <br />17.429 <br />Filename: Pond NHN-002 DESIGN 25YR EVENT_5.31.18.sc4 Printed 05-31-2018 <br />Appendix 2.05.3(4)-8 Page 24 June 2018 (TR -17) <br />