2025 02 Drainage Statement Signed

2025-01 HydroCAD NOAA 24-hr D 100-Year Rainfall=8.66" 2025-01 HydroCAD NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 2/21/2025 Prepared by Dynamic Engineering Printed 2/21/2025 HydroCAD® 10.20-6a s/n 08640 © 2024 HydroCAD Software Solutions LLC Page 50 HydroCAD® 10.20-6a s/n 08640 © 2024 HydroCAD Software Solutions LLC Page 51 Hydrograph for Subcatchment 4S: Proposed Pervious Summary for Link 5L: Existing Total Time Precip. Excess Runoff Time Precip. Excess Runoff Inflow Area 1.133 ac, 77.12% Impervious, Inflow Depth = 7.65" for 100-Year event (hours) (inches) (inches) (cfs) | (hours) (inches) (inches) (cfs) inflow 9.01 ofs @ 12.10 hrs, Volume= 0.722 af 0.00 0.00 0.00 0.00 | 26.00 866 5.28 0.00 = = = 9.90.00 0.00 9.00 | 2600 865 5.28 0.00 Primary 9.01 cfs@ 12.10 hrs, Volume: 0.722 af, Atten= 0%, Lag= 0.0 min 1.00 0.10 0.00 0.00 | 27.00 866 5.28 0.00 = 7 = = ts0 01s (000 ooo | o7so 868 S88 00 Primary outflow = Inflow, Time Span= 0.00-30.00 hrs, dt= 0.05 hrs 200 021 0.00 0.00 | 2800 866 528 0.00 . a 250 0.27 0.00 0.00 2850 866 5.28 0.00 Link 5L: Existing Total 3.00 033 0.00 0.00 | 29.00 866 528 0.00 Hydrograph 350 0.39 0.00 0.00 | 2950 886 5.28 0.00 400 0.45 0.00 0.00 | 30.00 866 5.28 0.00 450 0.52 0.00 0.00 0 tad tt 500 059 0.00 0.00 H Wy Araqn4 4° 550 0668 000 0.00 2 Inflow Area=1.13: 600 0.74 0.00 0.00 650 082 0.00 0.00 8 aLeke 7.00 091 0,00 0.00 750 1.01 0.01 0.01 r 800 «112 © 0.03 0.01 850 1.24 0.05 0.01 3? 900 137 0.08 0.02 £ 950 153 0.12 0.03 2° 10.00 1.72 0.18 0.04 Fd 1050 1.94 0.27 0.06 * 1100 225 0.40 0.10 3 1150 275 0.66 0.19 1200 415 1.57 1.02 2 1250 591 292 0.38 13.00 641 3.33 0.20 1’ 13.50 6.72 3.59 0.13 1400 694 3.78 0.10 ° ne. 1450 7.13 © 3.94 0.09 OL Raa SCT OO WT te 1 WW 18 19 0 2B 2 26 25 26-27 28-20 20 15.00 7.29 4.07 0.07 “Time (hours) 1550 7.42 4.19 0.06 16.00 7.54 4.29 0.06 1650 765 439 0.05 1700 7.75 4.47 0.05 1750 7.84 4.55 0.05 1800 7.92 4.62 0.04 1850 8.00 4.69 0.04 19.00 807 4.75 0.04 19.50 8.14 4.82 0.04 20.00 821 4.88 0.03 2050 827 493 0.03 2100 833 499 0.03 2150 839 5.04 0.03 2200 845 5.09 0.03 2250 851 5.14 0.03 23.00 856 5.19 0.03 2350 861 5.24 0.03 24.00 866 5.28 0.02 2450 866 5.28 0.00 25.00 866 5.28 0.00 25.50 866 5.28 0.00