2025 02 Drainage Statement Signed

2025-01 HydroCAD NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 2/21/2025 HydroCAD® 10.20-6a s/n 08640 © 2024 HydroCAD Software Solutions LLC Page 22 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 23 Hydrograph for Link 6L: Proposed Total Time Inflow Elevation Primary | Time Inflow Elevation Primary (hours) (cfs) (eet) (cfs) } (hours) (cfs) (feet) (cls) 0.00 0.00 0.00 0.00 | 26.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 | 26.50 0.00 0.00 0.00 1.00 0.00 0.00 0.00 | 27.00 0.00 0.00 0.00 1.50 0.01 0.00 oot | 27.50 0.00 0.00 0.00 2.00 0.01 0.00 oot | 28.00 0.00 0.00 0.00 2.50 0.02 0.00 0.02 | 28.50 0.00 0.00 0.00 3.00 0.02, 0.00 0.02 | 29.00 0.00 0.00 0.00 3.50 0.02 0.00 0.02 | 29.50 0.00 0.00 0.00 4,00 0.03 0.00 0.03 | 30.00 0.00 0.00 0.00 4.50 0.03 0.00 0.03 5.00 0.04 0.00 0.04 5.50 0.04 0.00 0.04 6.00 0.04 0.00 0.04 6.50 0.05 0.00 0.05, 7.00 0.05 0.00 0.05 7.50 0.06 0.00 0.06 8.00 0.07 0.00 0.07 8.50 0.08 0.00 0.08 9.00 0.08 0.00 0.08 9.50 0.10 0.00 0.10 10.00 0.13, 0.00 0.13 10.50 0.15 0.00 0.15 11.00 0.24 0.00 0.24 11.50 0.39 0.00 0.39 12.00 1.86 0.00 1.86 12.50 0.62 0.00 0.62 13.00 0.33, 0.00 0.33, 13.50 0.21 0.00 0.21 14.00 017 0.00 017 14.50 0.14 0.00 0.14 15.00 ott 0.00 ott 15.50 0.10 0.00 0.10 16.00 0.09 0.00 0.09 16.50 0.09 0.00 0.09 17.00 0.08 0.00 0.08 17.50 0.07 0.00 0.07 18.00 0.06 0.00 0.06 18.50 0.06 0.00 0.06 19.00 0.06 0.00 0.06 19.50 0.06 0.00 0.06 20.00 0.05, 0.00 0.05, 20:50 0.05 0.00 0.05, 21.00 0.05 0.00 0.05 21.50 0.05 0.00 0.05 22.00 0.05 0.00 0.05 22.50 0.04 0.00 0.04 23.00 0,04 0.00 0.04 23.50 0.04 0.00 0.04 24.00 0.04 0.00 0.04 24.50 0.00 0.00 0.00 25.00 0.00 0.00 0.00, 25.50 0.00 0.00 0.00 Time span=0.00-30.00 hrs, dt=0.05 hrs, 601 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-ind#Trans method - Pond routing by Stor-Ind method Subcatchment1S: ExistingImpervious Runoff Area=38,060 sf 100.00% Impervious Runoff Depth=4.98" Flow Length=267' Tc=4.3 min CN=98 Runoff=4.47 cfs 0.363 af Subcatchment2S: Existing Pervious Runoff Area=11,289 sf 0.00% Impervious Runoff Depth=2.20" Te=4,3 min CN=70 Runoff=0.69 cfs 0,048 af Subcatchment3S: Proposedimpervious Runoff Area=36,670 sf 100.00% Impervious Runoff Depth=4.98" Flow Length=370' To=4.4 min CN=98

mpervious Runoff Depth=2.20" Te=4,3 min CN=70 Runoff=0.69 cfs 0,048 af Subcatchment3S: Proposedimpervious Runoff Area=36,670 sf 100.00% Impervious Runoff Depth=4.98" Flow Length=370' To=4.4 min CN=98 Runoff=4.29 cfs 0.350 af Subcatchment4S: Proposed Pervious Runoff Area=12,691 sf 0.00% Impervious Runoff Depth=2.37" Flow Length=370' Tc=4.4 min CN=72 Runoff=0.83 cfs 0.058 af 16 cis 0.410 af 16 cfs 0.410 af Link SL: Existing Total Link 6L: Proposed Total Inflow=5.12 cfs 0.407 af Primary=5.12 cfs 0.407 af Total Runoff Area = 2.266 ac_Runoff Volume = 0.817 af Average Runoff Depth = 4.33" 24.29% Pervious = 0.551 ac 75.71% Impervious = 1.716 ac