2025 02 Drainage Statement Signed

2025-01 HydroCAD NOAA 24-hr D 2-Year Rainfall=3.44" 2025-01 HydroCAD NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 2/21/2025 Prepared by Dynamic Engineering Printed 2/21/2025 HydroCAD® 10.20-6a_ sin 08640 © 2024 HydroCAD Software Solutions LLC Page 10 HydroCAD® 10.20-6a sin 08640 © 2024 HydroCAD Software Solutions LLC Page 11 Hydrograph for Subcatchment 1S: Existing Impervious Summary for Subcatchment 2S: Existing Pervious Time Precip. Excess Runoff | Time Precip. Excess Runoff [49] Hint: To<2dt may require smaller dt (hours) (inches) (inches) (cis) | (hours) (inches) (inches) cfs) 0.00 0.00 0.00 0.00 26.000 3440 3.21 0.00 Runoff == 0.29cfs@ 12.11 hrs, Volume= 0.021 af, Depth= 0.97" 0.80 0.02 0.00 0.00 | 26.50 344 3.24 0.00 Routed to Link SL : Existing Total 1.00 0.04 0.00 0.00 | 2700 344 3.21 0.00 ry nee oor | oec0 has St $80 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-30,00 hrs, dt= 0.05 hrs 250 0.11 0.02 002 | 2850 344 3.21 0.00 NOAA 24-hr D 2-Year Rainfall=3.44" 300 013 0.03 002 | 2900 344 3.21 0.00 350 0.18 0.04 003 | 2950 344 3.21 0.00 Area(sf)_CN Description 400 0.18 0.06 0.03 | 30.00 344 3.21 0.00 3,045 61 _>75% Grass cover, Good, HSG B 33) Ooe 008 Os 8,244 74 >75% Grass cover, Good, HSG C Pn oa or O os 11,289 70 Weighted Average bop 028 da O04 11,289 100.00% Pervious Area 650 033 0.17 0.05 700 036 020 0.08 Te Length Slope Velocity Capacity Description 7.50 0.40 0.23 0.06 (min) (feet) _(fi/ft)_ (ft/sec) (cfs) 800 045 0.27, 0.07 43 Direct Entry, TC 850 049 0.31 0.08 900 055 0.36, 0.09 - Existi ; 950 061 042 on Subcatchment 2S: Existing Pervious 1000 0.68 0.49 0.13 Hydrograph 1050 0.77 0.87 0.16 = = 1100 089 «0.69 0.24 1150 109 0.88 0.39 1200 165 1.43 176 1250 235 212 0.55 13:00 255 2.32 0.29 1350 267 2.44 0.18 1400 276 «253 0.15 1450 283 2.60 0.12 1500 289 266 0.10 > 1550 295 2.71 0.09 3 1600 299 2.76 0.08 z 1650 304 2.81 0.07 z 1700 3.08 2.85 0.07 1750 3.11 2.88 0.06 1800 315 2.91 0.05 1850 318 © 2.94 0.05 4900 3.20 2.97 0.05 1950 3.23 3.00 0.05 20,00 326 3.03 0.05 2050 329 3.05 0.04 2100 331 3.08 0.04 iso 33330 004 CHET ESTES HHUHUE RTO DAN EDEN BH ewe 22:00 3363.12 0.04 2250 338 3.15 0.04 23:00 3403.17 0.04 2350 342 319 0.03 24.00 3.44 3.21 0.03 2450 3443.21 0.00 25.00 344 3.21 0.00 2550 344 3.21 0.00