2026 05 Storm Water Management Report rcd 5 6 2026

0.028 2-Year-Current Rainfall=3.47" Runoff Area=0.084 ac 0.05 0.026 P2=3.47" 0.024 Runoff Volume=0.004 af Flow (cfs) 0.045 Runoff Area=0.019 ac 0.022 Runoff Depth=0.56" 0.02 0.04 Runoff Volume=0.005 af 0.018 Flow Length=116' Flow (cfs) 0.035 Runoff Depth=3.24" 0.016 Slope=0.0540 '/' 0.014 0.03 Flow Length=107' 0.012

ngth=107' 0.012 Tc=9.3 min 0.025 Tc=8.7 min 0.01 CN=61 0.008 CN=98 0.02 0.006 0.004 0.015 0.002 0.01 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 0.005 Time (hours) 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)

2026-04 Proposed & Existing Conditi NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" 2026-04 Proposed & Existing Conditi NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" Prepared by Dynamic Engineering Printed 5/5/2026 Prepared by Dynamic Engineering Printed 5/5/2026 HydroCAD® 10.20-7a s/n 08640 © 2025 HydroCAD Software Solutions LLC Page 9 HydroCAD® 10.20-7a s/n 08640 © 2025 HydroCAD Software Solutions LLC Page 10 Summary for Link 1L: POI #1 Summary for Link 2L: POI #2 Inflow Area = 0.534 ac, 70.60% Impervious, Inflow Depth = 2.45" for 2-Year-Current event Inflow Area = 0.044 ac, 34.09% Impervious, Inflow Depth = 1.47" for 2-Year-Current event Inflow = 1.44 cfs @ 12.10 hrs, Volume= 0.109 af Inflow = 0.07 cfs @ 12.10 hrs, Volume= 0.005 af Primary = 1.44 cfs @ 12.10 hrs, Volume= 0.109 af, Atten= 0%, Lag= 0.0 min Primary = 0.07 cfs @ 12.10 hrs, Volume= 0.005 af, Atten= 0%, Lag= 0.0 min Routed to nonexistent node 15L Routed to nonexistent node 15L Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.001 hrs Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.001 hrs Link 1L: POI #1 Link 2L: POI #2

Link 1L: POI #1 Link 2L: POI #2 Hydrograph Hydrograph Inflow Inflow 1.44 cfs Primary 0.07 cfs Primary 1.44 cfs 0.075 0.07 cfs Inflow Area=0.534 ac 0.07 Inflow Area=0.044 ac 0.065 0.06 0.055 0.05 1 0.045 Flow (cfs)

0.045 Flow (cfs) Flow (cfs) 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) Time (hours)

2026-04 Proposed & Existing Conditi NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" 2026-04 Proposed & Existing CondiNOAA 24-hr D 2-Year-Projected Rainfall=4.09", P2=4.09" Prepared by Dynamic Engineering Printed 5/5/2026 Prepared by Dynamic Engineering Printed 5/5/2026 HydroCAD® 10.20-7a s/n 08640 © 2025 HydroCAD Software Solutions LLC Page 11 HydroCAD® 10.20-7a s/n 08640 © 2025 HydroCAD Software Solutions LLC Page 12 Summary for Link 3L: POI #3 Summary for Subcatchment 1S: EDA #1 - Impervious Inflow Area = 0.103 ac, 18.45% Impervious, Inflow Depth = 1.05" for 2-Year-Current event Runoff = 1.61 cfs @ 12.10 hrs, Volume= 0.121 af, Depth= 3.85" Inflow = 0.09 cfs @ 12.17 hrs, Volume= 0.009 af Routed to Link 1L : POI #1 Primary = 0.09 cfs @ 12.17 hrs, Volume= 0.009 af, Atten= 0%, Lag= 0.0 min Routed to nonexistent node 15L Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.001 hrs NOAA 24-hr D 2-Year-Projected Rainfall=4.09", P2=4.09" Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.001 hrs Area (ac) CN Description Link 3L: POI #3

Area (ac) CN Description Link 3L: POI #3 0.377 98 Paved parking, HSG B Hydrograph 0.377 100.00% Impervious Area Inflow Tc Length Slope Velocity Capacity Description 0.09 cfs Primary 0.1 0.09 cfs (min) (feet) (ft/ft) (ft/sec) (cfs) 0.095 0.09 Inflow Area=0.103 ac 1.4 100 0.0100 1.18 Sheet Flow, A-B Smooth surfaces n= 0.011 P2= 4.09" 0.085 0.08 0.2 119 0.0400 10.53 12.92 Pipe Channel, B-C 0.075 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' 0.07 n= 0.013 Corrugated PE, smooth interior 0.065

n= 0.013 Corrugated PE, smooth interior 0.065 1.6 219 Total 0.06 Flow (cfs) 0.055 0.05 Subcatchment 1S: EDA #1 - Impervious 0.045 Hydrograph 0.04 0.035 Runoff 0.03 1.61 cfs 0.025 0.02 NOAA 24-hr D 0.015 2-Year-Projected Rainfall=4.09" 0.01 0.005 P2=4.09" 0 Runoff

Runoff Area=0.377 ac 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) Runoff Volume=0.121 af Flow (cfs) 1 Runoff Depth=3.85" Flow Length=219' Tc=1.6 min CN=98 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72

32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)