2025 02 Drainage Statement Signed

2025-01 HydroCAD NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 2/21/2025 HydroCAD® 10.20-6a s/n 08640 © 2024 HydroCAD Software Solutions LLC Page 26 2025-01 HydroCAD NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 2/21/2025 HydroCAD® 10.20-6a s/n 08640 © 2024 HydroCAD Software Solutions LLC Page 27 Hydrograph for Subcatchment 1S: Existing Impervious Time Precip. Excess Runoff | Time Precip. Excess Runoff (hours)_(nehes) inches) (oi) | (houts}_(nches)_(nches) (cfs) 0.00 0.00 0.00 0.00 | 26.00 522 498 0.00 050 0.03 0.00 000 | 2650 522 498 0.00 4.00 0.06 0.00 oot | 2700 522 4.98 0.00 450 0.09 0.01 002 | 2750 522 4.98 0.00 200 013 0.02 003 | 2800 522 498 0.00 250 0.16 0.04 0.04 | 2850 522 498 0.00 3.00 020 0.07 0.04 | 2900 522 498 0.00 350 0.23 0.09 005 | 2950 522 498 0.00 4.00 0.27 0.12 0.05 | 3000 522 4.98 0.00 450 0.31 0.16 0.08 500 036 0.19 0.06 550 040 0.23 0.07 600 045 0.27 0.07 650 049 0.31 0.08 7.00 055 0.36 0.09 750 061 0.42 0.10 800 068 0.48 014 850 0.75 0.55 0.12 9.00 083 063 014 950 092 O71 0.17 10.00 1.03 0.82 0.21 1050 1.17 0.96 0.24 11400 1361.14 0.37 1150 165 1.43 0.60 1200 250 227 2.69 1250 357 3.33 0.84 13.00 386 3.63 0.44 1350 4.05 3.82 0.28 1400 4193.95 0.22 1450 430 4.06 0.19 15.00 439 4.16 0.15 1550 447 9 4.23 0.13 16.00 4.54 4.31 0.12 1650 461 437 ott 1700 467 4.43 0.10 1750 473 4.49 0.09 1800 477 4.54 0.08 1850 482 4.58 0.08 19.00 486 4.63 0.08 19.50 491 4.67 0.07 20.00 4.95 4.71 0.07 2050 499° 4.75 0.07 21.00 5.02 4.79 0.07 2150 5.08 4.82 0.06 22.00 5.09 4.86 0.08 22.50 5.13 4.89, 0.06 23.00 5.16 4.92 0.08 2350 5.19 4.95 0.05 24.00 5.22 4.98 0.05 2450 5.22 4.98 0.00 25.00 5.22 4.98 0.00 25.50 5.22 4.98 0.00 Summary for Subcatchment 2S: Existing Pervious [49] Hint: To<2dt may require smaller dt Runoff = 0.69 cfs @ 12.11 hrs, Volume= 0.048 af, Depth= 2.20" Routed to Link SL : Existing Total Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-30.00 hrs, dt= 0.05 hrs NOAA 24-hr D 10-Year Rainfall=5.22" Area (sf) CN Description 3,045 61 _>75% Grass cover, Good, HSG B 8.244 74 _>75% Grass cover, Good, HSG C 11,289 70 Weighted Average 11,289 100.00% Pervious Area Te Length Slope Velocity Capacity Description (min) (feet) _(f/ft) _(flsec) (cfs) 43 Direct Entry, TC Subcatchment 2S: Existing Pervious Hydrograph Flow (efs) ores 6567 8.9 01 2 Te 16 17 18 79 20 21 22

ength Slope Velocity Capacity Description (min) (feet) _(f/ft) _(flsec) (cfs) 43 Direct Entry, TC Subcatchment 2S: Existing Pervious Hydrograph Flow (efs) ores 6567 8.9 01 2 Te 16 17 18 79 20 21 22 29 24 25 26 27 28 29 30 (hours)