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 38 2025-01 HydroCAD NOAA 24-hr D. 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 2/21/2025 HydroCAD® 10.20-6a s/n 08640 © 2024 HydroCAD Software Solutions LLC Page 39 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 0.01 0.00 o.o1 | 27.00 0.00 0.00 0.00 1.50 0.02 0.00 o.o2 | 27.50 0.00 0.00 0.00 2.00 0.03 0.00 0.03 | 28.00 0.00 0.00 0.00 2.50 0.04 0.00 0.04 | 28.50 0.00 0.00 0.00 3.00 0.04 0.00 0.04 | 29.00 0.00 0.00 0.00 3.50 0.05 0.00 0.05 | 29.50 0.00 0.00 0.00 4,00 0.05 0.00 0.05 | 30.00 0.00 0.00 0.00 4.50 0.06 0.00 0.06 5.00 0.06 0.00 0.06 5.50 0.07 0.00 0.07 6.00 0.07 0.00 0.07 6.50 0.08 0.00 0.08 7.00 0.09 0.00 0.09 7.50 0.10 0.00 0.10 8.00 ott 0.00 ont 8.50 0.12 0.00 0.12 9.00 0.13 0.00 0.13 9.50 O17 0.00 O17 10.00 0.21 0.00 0.24 10.50 0.25 0.00 0.25 11.00 0.39 0.00 0.39 11.50 0.65, 0.00 0.65 12.00 3.01 0.00 3.01 12.50 0.99 0.00 0.99 13.00 0.52 0.00 0.52 13.50 0.34 0.00 0.34 14.00 027 0.00 027 14.50 0.22 0.00 0.22 15.00 0.18 0.00 0.18 15.50 O16 0.00 0.16 16.00 0.15 0.00 0.15, 16.50 014 0.00 014 17.00 0.13, 0.00 0.13 17.50 0.11 0.00 ont 18.00 0.10 0.00 0.10 18.50 0.10 0.00 0.10 19.00 0.09 0.00 0.09 19.50 0.09 0.00 0.09 20.00 0.09 0.00 0.09 20:50 0.08 0.00 0.08 21.00 0.08 0.00 0.08 21.50 0.08 0.00 0.08 22.00 0.07 0.00 0.07 22.50 0.07 0.00 0.07 23.00 0.07 0.00 0.07 23.50 0.06 0.00 0.06 24.00 0.06 0.00 0.06 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=8.42" Flow Length=267' Tc=4.3 min CN=98 Runoff=7.45 cfs 0.613 af ‘Subcatchment2S: Existing Pervious Runoff Area=11,289 sf 0.00% Impervious Runoff Depth=5.04" Te=4.3 min CN=70 Runoff=1.57 cfs 0,109 af Subcatchment3S: Proposedimpervious Runoff Area=36,670 sf 100.00% Impervious Runoff Depth=8.42" Flow Length=370' To=4.4 min CN=98 Runoff=7.14 cfs

Depth=5.04" Te=4.3 min CN=70 Runoff=1.57 cfs 0,109 af Subcatchment3S: Proposedimpervious Runoff Area=36,670 sf 100.00% Impervious Runoff Depth=8.42" Flow Length=370' To=4.4 min CN=98 Runoff=7.14 cfs 0.591 af Subcatchment4S: Proposed Pervious Runoff Area=12,691 sf 0.00% Impervious Runoff Depth=5.28" Flow Length=370' Tc=4.4 min CN=72 Runoff=1.83 cfs 0.128 af Link SL: Existing Total Link 6L: Proposed Total Inflow=8.97 cfs 0.719 af Primary=8.97 cfs 0.719 af Total Runoff Area = 2.266 ac_Runoff Volume = 1.441 af Average Runoff Depth = 7.63" 24.29% Pervious = 0.551 ac 75.71% Impervious = 1.716 ac