240916_40 ERW Stormwater Report FULL

NOAA 24-hr D 100-Year Rainfall=8.66"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 163HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment PR 3 - P: Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 1.00 0.10 0.00 0.00 2.00 0.21 0.00 0.00 3.00 0.33 0.00 0.00 4.00 0.45 0.00 0.00 5.00 0.59 0.00 0.00 6.00 0.74 0.00 0.00 7.00 0.91 0.01 0.00 8.00 1.12 0.05 0.01 9.00 1.37 0.11 0.02 10.00 1.72 0.23 0.04 11.00 2.25 0.47 0.08 12.00 4.15 1.71 0.67 13.00 6.41 3.53 0.18 14.00 6.94 3.99 0.09 15.00 7.29 4.29 0.06 16.00 7.54 4.51 0.05 17.00 7.75 4.70 0.04 18.00 7.92 4.85 0.03 19.00 8.07 4.99 0.03 20.00 8.21 5.11 0.03 21.00 8.33 5.23 0.03 22.00 8.45 5.33 0.02 23.00 8.56 5.43 0.02 24.00 8.66 5.52 0.02 25.00 8.66 5.52 0.00 26.00 8.66 5.52 0.00 27.00 8.66 5.52 0.00 28.00 8.66 5.52 0.00 29.00 8.66 5.52 0.00 30.00 8.66 5.52 0.00 31.00 8.66 5.52 0.00 32.00 8.66 5.52 0.00 33.00 8.66 5.52 0.00 34.00 8.66 5.52 0.00 35.00 8.66 5.52 0.00 36.00 8.66 5.52 0.00 37.00 8.66 5.52 0.00 38.00 8.66 5.52 0.00 39.00 8.66 5.52 0.00 40.00 8.66 5.52 0.00 41.00 8.66 5.52 0.00 42.00 8.66 5.52 0.00 43.00 8.66 5.52 0.00 44.00 8.66 5.52 0.00 45.00 8.66 5.52 0.00 46.00 8.66 5.52 0.00 47.00 8.66 5.52 0.00 48.00 8.66 5.52 0.00 49.00 8.66 5.52 0.00 50.00 8.66 5.52 0.00 51.00 8.66 5.52 0.00 52.00 8.66 5.52 0.00 53.00 8.66 5.52 0.00 54.00 8.66 5.52 0.00 55.00 8.66 5.52 0.00 56.00 8.66 5.52 0.00 57.00 8.66 5.52 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 58.00 8.66 5.52 0.00 59.00 8.66 5.52 0.00 60.00 8.66 5.52 0.00 61.00 8.66 5.52 0.00 62.00 8.66 5.52 0.00 63.00 8.66 5.52 0.00 64.00 8.66 5.52 0.00 65.00 8.66 5.52 0.00 66.00 8.66 5.52 0.00 67.00 8.66 5.52 0.00 68.00 8.66 5.52 0.00 69.00 8.66 5.52 0.00 70.00 8.66 5.52 0.00 71.00 8.66 5.52 0.00 72.00 8.66 5.52 0.00 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 100-Year Rainfall=8.66"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 164HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR-2B-I: Runoff = 1.81 cfs @ 12.06 hrs, Volume= 0.139 af, Depth= 8.42" Routed to Pond 11P : Existing Drywell System Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 100-Year Rainfall=8.66" Area (sf) CN Description 8,642 98 Paved parking, HSG C 8,642 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.1 75 0.0140 1.17 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.44" Subcatchment PR-2B-I: Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 2 1 0 NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=8,642 sf Runoff Volume=0.139 af Runoff Depth=8.42" Flow Length=75' Slope=0.0140 '/' Tc=1.1 min CN=98 1.81 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 100-Year Rainfall=8.66"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 165HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment PR-2B-I: Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 1.00 0.10 0.01 0.01 2.00 0.21 0.08 0.02 3.00 0.33 0.17 0.02 4.00 0.45 0.28 0.02 5.00 0.59 0.40 0.03 6.00 0.74 0.54 0.03 7.00 0.91 0.71 0.04 8.00 1.12 0.91 0.04 9.00 1.37 1.16 0.05 10.00 1.72 1.49 0.08 11.00 2.25 2.02 0.15 12.00 4.15 3.91 1.21 13.00 6.41 6.17 0.16 14.00 6.94 6.70 0.08 15.00 7.29 7.05 0.06 16.00 7.54 7.30 0.05 17.00 7.75 7.51 0.04 18.00 7.92 7.68 0.03 19.00 8.07 7.83 0.03 20.00 8.21 7.97 0.03 21.00 8.33 8.09 0.02 22.00 8.45 8.21 0.02 23.00 8.56 8.32 0.02 24.00 8.66 8.42 0.02 25.00 8.66 8.42 0.00 26.00 8.66 8.42 0.00 27.00 8.66 8.42 0.00 28.00 8.66 8.42 0.00 29.00 8.66 8.42 0.00 30.00 8.66 8.42 0.00 31.00 8.66 8.42 0.00 32.00 8.66 8.42 0.00 33.00 8.66 8.42 0.00 34.00 8.66 8.42 0.00 35.00 8.66 8.42 0.00 36.00 8.66 8.42 0.00 37.00 8.66 8.42 0.00 38.00 8.66 8.42 0.00 39.00 8.66 8.42 0.00 40.00 8.66 8.42 0.00 41.00 8.66 8.42 0.00 42.00 8.66 8.42 0.00 43.00 8.66 8.42 0.00 44.00 8.66 8.42 0.00 45.00 8.66 8.42 0.00 46.00 8.66 8.42 0.00 47.00 8.66 8.42 0.00 48.00 8.66 8.42 0.00 49.00 8.66 8.42 0.00 50.00 8.66 8.42 0.00 51.00 8.66 8.42 0.00 52.00 8.66 8.42 0.00 53.00 8.66 8.42 0.00 54.00 8.66 8.42 0.00 55.00 8.66 8.42 0.00 56.00 8.66 8.42 0.00 57.00 8.66 8.42 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 58.00 8.66 8.42 0.00 59.00 8.66 8.42 0.00 60.00 8.66 8.42 0.00 61.00 8.66 8.42 0.00 62.00 8.66 8.42 0.00 63.00 8.66 8.42 0.00 64.00 8.66 8.42 0.00 65.00 8.66 8.42 0.00 66.00 8.66 8.42 0.00 67.00 8.66 8.42 0.00 68.00 8.66 8.42 0.00 69.00 8.66 8.42 0.00 70.00 8.66 8.42 0.00 71.00 8.66 8.42 0.00 72.00 8.66 8.42 0.00 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 100-Year Rainfall=8.66"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 166HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR-2B-P: Runoff = 0.19 cfs @ 12.15 hrs, Volume= 0.015 af, Depth= 5.52" Routed to Pond 11P : Existing Drywell System Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 100-Year Rainfall=8.66" Area (sf) CN Description 1,446 74 >75% Grass cover, Good, HSG C 1,446 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.5 69 0.0170 0.15 Sheet Flow, Grass: Short n= 0.150 P2= 3.44" 0.4 31 0.0220 1.17 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.44" 0.1 14 0.0180 2.72 Shallow Concentrated Flow, Paved Kv= 20.3 fps 8.0 114 Total Subcatchment PR-2B-P: Runoff Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=1,446 sf Runoff Volume=0.015 af Runoff Depth=5.52" Flow Length=114' Tc=8.0 min CN=74 0.19 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 100-Year Rainfall=8.66"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 167HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Hydrograph for Subcatchment PR-2B-P: Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 1.00 0.10 0.00 0.00 2.00 0.21 0.00 0.00 3.00 0.33 0.00 0.00 4.00 0.45 0.00 0.00 5.00 0.59 0.00 0.00 6.00 0.74 0.00 0.00 7.00 0.91 0.01 0.00 8.00 1.12 0.05 0.00 9.00 1.37 0.11 0.00 10.00 1.72 0.23 0.01 11.00 2.25 0.47 0.01 12.00 4.15 1.71 0.09 13.00 6.41 3.53 0.02 14.00 6.94 3.99 0.01 15.00 7.29 4.29 0.01 16.00 7.54 4.51 0.01 17.00 7.75 4.70 0.01 18.00 7.92 4.85 0.00 19.00 8.07 4.99 0.00 20.00 8.21 5.11 0.00 21.00 8.33 5.23 0.00 22.00 8.45 5.33 0.00 23.00 8.56 5.43 0.00 24.00 8.66 5.52 0.00 25.00 8.66 5.52 0.00 26.00 8.66 5.52 0.00 27.00 8.66 5.52 0.00 28.00 8.66 5.52 0.00 29.00 8.66 5.52 0.00 30.00 8.66 5.52 0.00 31.00 8.66 5.52 0.00 32.00 8.66 5.52 0.00 33.00 8.66 5.52 0.00 34.00 8.66 5.52 0.00 35.00 8.66 5.52 0.00 36.00 8.66 5.52 0.00 37.00 8.66 5.52 0.00 38.00 8.66 5.52 0.00 39.00 8.66 5.52 0.00 40.00 8.66 5.52 0.00 41.00 8.66 5.52 0.00 42.00 8.66 5.52 0.00 43.00 8.66 5.52 0.00 44.00 8.66 5.52 0.00 45.00 8.66 5.52 0.00 46.00 8.66 5.52 0.00 47.00 8.66 5.52 0.00 48.00 8.66 5.52 0.00 49.00 8.66 5.52 0.00 50.00 8.66 5.52 0.00 51.00 8.66 5.52 0.00 52.00 8.66 5.52 0.00 53.00 8.66 5.52 0.00 54.00 8.66 5.52 0.00 55.00 8.66 5.52 0.00 56.00 8.66 5.52 0.00 57.00 8.66 5.52 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 58.00 8.66 5.52 0.00 59.00 8.66 5.52 0.00 60.00 8.66 5.52 0.00 61.00 8.66 5.52 0.00 62.00 8.66 5.52 0.00 63.00 8.66 5.52 0.00 64.00 8.66 5.52 0.00 65.00 8.66 5.52 0.00 66.00 8.66 5.52 0.00 67.00 8.66 5.52 0.00 68.00 8.66 5.52 0.00 69.00 8.66 5.52 0.00 70.00 8.66 5.52 0.00 71.00 8.66 5.52 0.00 72.00 8.66 5.52 0.00 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 100-Year Rainfall=8.66"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 168HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Summary for Reach 1R: TOP Inflow Area = 1.006 ac, 21.70% Impervious, Inflow Depth = 6.24" for 100-Year event Inflow = 5.22 cfs @ 12.11 hrs, Volume= 0.523 af Outflow = 5.22 cfs @ 12.11 hrs, Volume= 0.523 af, Atten= 0%, Lag= 0.0 min Routed to Reach 2R : CHANNEL Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 1R: TOP Inflow Outflow Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 5 4 3 2 1 0 Inflow Area=1.006 ac 5.22 cfs 5.22 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 100-Year Rainfall=8.66"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 169HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Hydrograph for Reach 1R: TOP Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 1.00 0.01 0.01 2.00 0.02 0.02 3.00 0.02 0.02 4.00 0.03 0.03 5.00 0.03 0.03 6.00 0.04 0.04 7.00 0.06 0.06 8.00 0.09 0.09 9.00 0.12 0.12 10.00 0.21 0.21 11.00 0.44 0.44 12.00 3.16 3.16 13.00 0.80 0.80 14.00 0.39 0.39 15.00 0.27 0.27 16.00 0.22 0.22 17.00 0.18 0.18 18.00 0.15 0.15 19.00 0.13 0.13 20.00 0.13 0.13 21.00 0.12 0.12 22.00 0.11 0.11 23.00 0.10 0.10 24.00 0.09 0.09 25.00 0.00 0.00 26.00 0.00 0.00 27.00 0.00 0.00 28.00 0.00 0.00 29.00 0.00 0.00 30.00 0.00 0.00 31.00 0.00 0.00 32.00 0.00 0.00 33.00 0.00 0.00 34.00 0.00 0.00 35.00 0.00 0.00 36.00 0.00 0.00 37.00 0.00 0.00 38.00 0.00 0.00 39.00 0.00 0.00 40.00 0.00 0.00 41.00 0.00 0.00 42.00 0.00 0.00 43.00 0.00 0.00 44.00 0.00 0.00 45.00 0.00 0.00 46.00 0.00 0.00 47.00 0.00 0.00 48.00 0.00 0.00 49.00 0.00 0.00 50.00 0.00 0.00 51.00 0.00 0.00 52.00 0.00 0.00 53.00 0.00 0.00 54.00 0.00 0.00 55.00 0.00 0.00 56.00 0.00 0.00 57.00 0.00 0.00 Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 58.00 0.00 0.00 59.00 0.00 0.00 60.00 0.00 0.00 61.00 0.00 0.00 62.00 0.00 0.00 63.00 0.00 0.00 64.00 0.00 0.00 65.00 0.00 0.00 66.00 0.00 0.00 67.00 0.00 0.00 68.00 0.00 0.00 69.00 0.00 0.00 70.00 0.00 0.00 71.00 0.00 0.00 72.00 0.00 0.00 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 100-Year Rainfall=8.66"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 170HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Summary for Reach 2R: CHANNEL Inflow Area = 1.773 ac, 12.31% Impervious, Inflow Depth = 5.93" for 100-Year event Inflow = 9.04 cfs @ 12.17 hrs, Volume= 0.876 af Outflow = 9.04 cfs @ 12.17 hrs, Volume= 0.876 af, Atten= 0%, Lag= 0.0 min Routed to Reach 3R : TOTAL Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 2R: CHANNEL Inflow Outflow Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=1.773 ac 9.04 cfs 9.04 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 100-Year Rainfall=8.66"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 171HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Hydrograph for Reach 2R: CHANNEL Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 1.00 0.01 0.01 2.00 0.02 0.02 3.00 0.02 0.02 4.00 0.03 0.03 5.00 0.03 0.03 6.00 0.04 0.04 7.00 0.07 0.07 8.00 0.12 0.12 9.00 0.18 0.18 10.00 0.33 0.33 11.00 0.69 0.69 12.00 4.99 4.99 13.00 1.39 1.39 14.00 0.68 0.68 15.00 0.47 0.47 16.00 0.38 0.38 17.00 0.32 0.32 18.00 0.26 0.26 19.00 0.23 0.23 20.00 0.22 0.22 21.00 0.20 0.20 22.00 0.19 0.19 23.00 0.17 0.17 24.00 0.16 0.16 25.00 0.00 0.00 26.00 0.00 0.00 27.00 0.00 0.00 28.00 0.00 0.00 29.00 0.00 0.00 30.00 0.00 0.00 31.00 0.00 0.00 32.00 0.00 0.00 33.00 0.00 0.00 34.00 0.00 0.00 35.00 0.00 0.00 36.00 0.00 0.00 37.00 0.00 0.00 38.00 0.00 0.00 39.00 0.00 0.00 40.00 0.00 0.00 41.00 0.00 0.00 42.00 0.00 0.00 43.00 0.00 0.00 44.00 0.00 0.00 45.00 0.00 0.00 46.00 0.00 0.00 47.00 0.00 0.00 48.00 0.00 0.00 49.00 0.00 0.00 50.00 0.00 0.00 51.00 0.00 0.00 52.00 0.00 0.00 53.00 0.00 0.00 54.00 0.00 0.00 55.00 0.00 0.00 56.00 0.00 0.00 57.00 0.00 0.00 Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 58.00 0.00 0.00 59.00 0.00 0.00 60.00 0.00 0.00 61.00 0.00 0.00 62.00 0.00 0.00 63.00 0.00 0.00 64.00 0.00 0.00 65.00 0.00 0.00 66.00 0.00 0.00 67.00 0.00 0.00 68.00 0.00 0.00 69.00 0.00 0.00 70.00 0.00 0.00 71.00 0.00 0.00 72.00 0.00 0.00 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NOAA 24-hr D 100-Year Rainfall=8.66"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 172HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Summary for Reach 3R: TOTAL Inflow Area = 2.068 ac, 10.56% Impervious, Inflow Depth = 5.91" for 100-Year event Inflow = 10.82 cfs @ 12.16 hrs, Volume= 1.018 af Outflow = 10.82 cfs @ 12.16 hrs, Volume= 1.018 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 3R: TOTAL Inflow Outflow Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=2.068 ac 10.82 cfs 10.82 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.