complete drainage report rev 9

Existing Conditions NOAA 24-hr D 100-Year Rainfall=8.66" 2024-04-20 HydroCAD - Existing Printed 10/25/2024 Page 50 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Link 12L: Total Time (hours) 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 16.00 17.00 18.00 19.00 20.00 21.00 22.00 23.00 24.00 25.00 26.00 27.00 28.00 29.00 30.00 31.00 32.00 33.00 34.00 35.00 36.00 37.00 38.00 39.00 40.00 41.00 42.00 43.00 44.00 45.00 46.00 47.00 48.00 49.00 50.00 Inflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.31 0.94 1.77 3.57 7.77 41.43 25.27 10.99 7.65 5.93 5.02 4.09 3.62 3.38 3.15 2.92 2.69 2.45 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Elevation (feet) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Primary (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.31 0.94 1.77 3.57 7.77 41.43 25.27 10.99 7.65 5.93 5.02 4.09 3.62 3.38 3.15 2.92 2.69 2.45 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time (hours) 51.00 52.00 53.00 54.00 55.00 56.00 57.00 58.00 59.00 60.00 61.00 62.00 63.00 64.00 65.00 66.00 67.00 68.00 69.00 70.00 71.00 72.00 Inflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Elevation (feet) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Primary (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Existing Conditions NOAA 24-hr D 100-Year Rainfall=8.66" 2024-04-20 HydroCAD - Existing Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 51 Summary for Link 13L: DA 3 Inflow Area = 7,751 sf, 0.00% Impervious, Inflow Depth = 5.04" for 100-Year event Inflow = 0.75 cfs @ 12.24 hrs, Volume= 3,253 cf Primary = 0.75 cfs @ 12.24 hrs, Volume= 3,253 cf, Atten= 0%, Lag= 0.0 min Routed to Link 12L : Total Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Link 13L: DA 3 Hydrograph 0.8 0.75 Inflow Primary 0.75 cfs 0.75 cfs Inflow Area=7,751 sf 0.7 0.65 0.6 Flow (cfs) 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 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)

Existing Conditions NOAA 24-hr D 100-Year Rainfall=8.66" 2024-04-20 HydroCAD - Existing Printed 10/25/2024 Page 52 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Link 13L: DA 3 Time (hours) 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 16.00 17.00 18.00 19.00 20.00 21.00 22.00 23.00 24.00 25.00 26.00 27.00 28.00 29.00 30.00 31.00 32.00 33.00 34.00 35.00 36.00 37.00 38.00 39.00 40.00 41.00 42.00 43.00 44.00 45.00 46.00 47.00 48.00 49.00 50.00 Inflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.04 0.27 0.14 0.07 0.05 0.04 0.03 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Elevation (feet) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Primary (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.04 0.27 0.14 0.07 0.05 0.04 0.03 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time (hours) 51.00 52.00 53.00 54.00 55.00 56.00 57.00 58.00 59.00 60.00 61.00 62.00 63.00 64.00 65.00 66.00 67.00 68.00 69.00 70.00 71.00 72.00 Inflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Elevation (feet) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Primary (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Existing Conditions 2024-04-20 HydroCAD - Existing Multi-Event Tables Prepared by Anderson Consulting Services Printed 10/25/2024 Page 53 HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Events for Subcatchment 4S: DA 2 - Perv Event Rainfall (inches) 2-Year 10-Year 100-Year 3.44 5.22 8.66 Runoff (cfs) 14.76 33.11 72.79 Volume Depth (cubic-feet) (inches) 68,577 147,700 324,925 1.14 2.45 5.40

Existing Conditions 2024-04-20 HydroCAD - Existing Multi-Event Tables Prepared by Anderson Consulting Services Printed 10/25/2024 Page 54 HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Events for Subcatchment 10S: DA 1 - Perv Event Rainfall (inches) 2-Year 10-Year 100-Year 3.44 5.22 8.66 Runoff (cfs) 8.62 19.40 42.86 Volume Depth (cubic-feet) (inches) 45,754 98,544 216,786 1.14 2.45 5.40

Existing Conditions 2024-04-20 HydroCAD - Existing Multi-Event Tables Prepared by Anderson Consulting Services Printed 10/25/2024 Page 55 HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Events for Subcatchment 14S: DA 3 - Perv Event Rainfall (inches) 2-Year 10-Year 100-Year 3.44 5.22 8.66 Runoff (cfs) 0.13 0.32 0.75 Volume Depth (cubic-feet) (inches) 627 1,422 3,253 0.97 2.20 5.04

Existing Conditions 2024-04-20 HydroCAD - Existing Multi-Event Tables Prepared by Anderson Consulting Services Printed 10/25/2024 Page 56 HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Events for Link 2L: DA 2 Event Inflow (cfs) Primary (cfs) Elevation (feet) 2-Year 10-Year 100-Year 14.76 33.11 72.79 14.76 33.11 72.79 0.00 0.00 0.00

Existing Conditions 2024-04-20 HydroCAD - Existing Multi-Event Tables Prepared by Anderson Consulting Services Printed 10/25/2024 Page 57 HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Events for Link 11L: DA 1 Event Inflow (cfs) Primary (cfs) Elevation (feet) 2-Year 10-Year 100-Year 8.62 19.40 42.86 8.62 19.40 42.86 0.00 0.00 0.00

Existing Conditions 2024-04-20 HydroCAD - Existing Multi-Event Tables Prepared by Anderson Consulting Services Printed 10/25/2024 Page 58 HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Events for Link 12L: Total Event Inflow (cfs) Primary (cfs) Elevation (feet) 2-Year 10-Year 100-Year 22.98 51.71 114.35 22.98 51.71 114.35 0.00 0.00 0.00

Existing Conditions 2024-04-20 HydroCAD - Existing Multi-Event Tables Prepared by Anderson Consulting Services Printed 10/25/2024 Page 59 HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Events for Link 13L: DA 3 Event Inflow (cfs) Primary (cfs) Elevation (feet) 2-Year 10-Year 100-Year 0.13 0.32 0.75 0.13 0.32 0.75 0.00 0.00 0.00