240916_40 ERW Stormwater Report FULL

NOAA 24-hr D 2-Year Rainfall=3.44"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 49HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Hydrograph for Reach DP2: CHANNEL Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 1.00 0.00 0.00 2.00 0.00 0.00 3.00 0.00 0.00 4.00 0.00 0.00 5.00 0.00 0.00 6.00 0.00 0.00 7.00 0.00 0.00 8.00 0.01 0.01 9.00 0.01 0.01 10.00 0.01 0.01 11.00 0.03 0.03 12.00 0.49 0.49 13.00 0.26 0.26 14.00 0.10 0.10 15.00 0.06 0.06 16.00 0.04 0.04 17.00 0.04 0.04 18.00 0.03 0.03 19.00 0.03 0.03 20.00 0.03 0.03 21.00 0.02 0.02 22.00 0.02 0.02 23.00 0.02 0.02 24.00 0.02 0.02 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 2-Year Rainfall=3.44"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 50HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Summary for Reach DP3: TOTAL Inflow Area = 2.014 ac, 22.91% Impervious, Inflow Depth = 0.74" for 2-Year event Inflow = 1.23 cfs @ 12.13 hrs, Volume= 0.124 af Outflow = 1.23 cfs @ 12.13 hrs, Volume= 0.124 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 DP3: TOTAL Inflow Outflow Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 1 0 Inflow Area=2.014 ac 1.23 cfs 1.23 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 2-Year Rainfall=3.44"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 51HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Hydrograph for Reach DP3: TOTAL Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 1.00 0.00 0.00 2.00 0.00 0.00 3.00 0.00 0.00 4.00 0.00 0.00 5.00 0.00 0.00 6.00 0.00 0.00 7.00 0.00 0.00 8.00 0.01 0.01 9.00 0.01 0.01 10.00 0.01 0.01 11.00 0.04 0.04 12.00 0.61 0.61 13.00 0.30 0.30 14.00 0.13 0.13 15.00 0.08 0.08 16.00 0.06 0.06 17.00 0.05 0.05 18.00 0.04 0.04 19.00 0.04 0.04 20.00 0.03 0.03 21.00 0.03 0.03 22.00 0.03 0.03 23.00 0.03 0.03 24.00 0.03 0.03 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 2-Year Rainfall=3.44"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 52HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Summary for Reach EX 1: Inflow Area = 0.718 ac, 9.34% Impervious, Inflow Depth = 1.13" for 2-Year event Inflow = 0.65 cfs @ 12.18 hrs, Volume= 0.068 af Outflow = 0.65 cfs @ 12.18 hrs, Volume= 0.068 af, Atten= 0%, Lag= 0.0 min Routed to Pond 10P : (new Pond) Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach EX 1: Inflow Outflow Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=0.718 ac 0.65 cfs 0.65 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 2-Year Rainfall=3.44"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 53HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Hydrograph for Reach EX 1: Time (hours) Inflow (cfs) Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 1.00 0.00 0.00 2.00 0.00 0.00 3.00 0.00 0.00 4.00 0.00 0.00 5.00 0.00 0.00 6.00 0.00 0.00 7.00 0.00 0.00 8.00 0.01 0.01 9.00 0.01 0.01 10.00 0.01 0.01 11.00 0.03 0.03 12.00 0.35 0.35 13.00 0.12 0.12 14.00 0.06 0.06 15.00 0.04 0.04 16.00 0.04 0.04 17.00 0.03 0.03 18.00 0.02 0.02 19.00 0.02 0.02 20.00 0.02 0.02 21.00 0.02 0.02 22.00 0.02 0.02 23.00 0.02 0.02 24.00 0.02 0.02 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 2-Year Rainfall=3.44"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 54HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2P: Pervious Pavers Inflow Area = 0.152 ac, 0.00% Impervious, Inflow Depth = 2.30" for 2-Year event Inflow = 0.39 cfs @ 12.13 hrs, Volume= 0.029 af Outflow = 0.08 cfs @ 12.55 hrs, Volume= 0.029 af, Atten= 80%, Lag= 25.4 min Discarded = 0.08 cfs @ 12.55 hrs, Volume= 0.029 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 624.53' @ 12.55 hrs Surf.Area= 0.151 ac Storage= 0.007 af Plug-Flow detention time= 24.4 min calculated for 0.029 af (100% of inflow) Center-of-Mass det. time= 24.4 min ( 840.1 - 815.8 ) Volume Invert Avail.Storage Storage Description #1 624.42' 0.061 af 65.91'W x 100.00'L x 1.00'H Prismatoid 0.151 af Overall x 40.0% Voids Device Routing Invert Outlet Devices #1 Discarded 624.42' 0.500 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 619.00' Discarded OutFlow Max=0.08 cfs @ 12.55 hrs HW=624.53' (Free Discharge) 1=Exfiltration ( Controls 0.08 cfs) Pond 2P: Pervious Pavers Inflow Discarded Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=0.152 ac Peak Elev=624.53' Storage=0.007 af 0.39 cfs 0.08 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 2-Year Rainfall=3.44"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 55HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Pond 2P: Pervious Pavers Surface Storage Stage-Area-Storage Storage (acre-feet) 0.060.0550.050.0450.040.0350.030.0250.020.0150.010.0050 Surface/Horizontal/Wetted Area (acres) 0.150.140.130.120.110.10.090.080.070.060.050.040.030.020.010 Elevation (feet) 625 Prismatoid 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 2-Year Rainfall=3.44"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 56HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Hydrograph for Pond 2P: Pervious Pavers Time (hours) Inflow (cfs) Storage (acre-feet) Elevation (feet) Discarded (cfs) 0.00 0.00 0.000 624.42 0.00 2.50 0.00 0.000 624.42 0.00 5.00 0.00 0.000 624.42 0.00 7.50 0.00 0.000 624.42 0.00 10.00 0.01 0.000 624.42 0.01 12.50 0.08 0.007 624.53 0.08 15.00 0.02 0.000 624.42 0.02 17.50 0.01 0.000 624.42 0.01 20.00 0.01 0.000 624.42 0.01 22.50 0.01 0.000 624.42 0.01 25.00 0.00 0.000 624.42 0.00 27.50 0.00 0.000 624.42 0.00 30.00 0.00 0.000 624.42 0.00 32.50 0.00 0.000 624.42 0.00 35.00 0.00 0.000 624.42 0.00 37.50 0.00 0.000 624.42 0.00 40.00 0.00 0.000 624.42 0.00 42.50 0.00 0.000 624.42 0.00 45.00 0.00 0.000 624.42 0.00 47.50 0.00 0.000 624.42 0.00 50.00 0.00 0.000 624.42 0.00 52.50 0.00 0.000 624.42 0.00 55.00 0.00 0.000 624.42 0.00 57.50 0.00 0.000 624.42 0.00 60.00 0.00 0.000 624.42 0.00 62.50 0.00 0.000 624.42 0.00 65.00 0.00 0.000 624.42 0.00 67.50 0.00 0.000 624.42 0.00 70.00 0.00 0.000 624.42 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 2-Year Rainfall=3.44"240913_40 ERW Waymaker Proposed Printed 9/16/2024Prepared by Colliers Engineering & Design Page 57HydroCAD® 10.20-2g s/n 04431 © 2022 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond 2P: Pervious Pavers Elevation (feet) Surface (acres) Storage (acre-feet) 624.42 0.151 0.000 624.43 0.151 0.001 624.44 0.151 0.001 624.45 0.151 0.002 624.46 0.151 0.002 624.47 0.151 0.003 624.48 0.151 0.004 624.49 0.151 0.004 624.50 0.151 0.005 624.51 0.151 0.005 624.52 0.151 0.006 624.53 0.151 0.007 624.54 0.151 0.007 624.55 0.151 0.008 624.56 0.151 0.008 624.57 0.151 0.009 624.58 0.151 0.010 624.59 0.151 0.010 624.60 0.151 0.011 624.61 0.151 0.011 624.62 0.151 0.012 624.63 0.151 0.013 624.64 0.151 0.013 624.65 0.151 0.014 624.66 0.151 0.015 624.67 0.151 0.015 624.68 0.151 0.016 624.69 0.151 0.016 624.70 0.151 0.017 624.71 0.151 0.018 624.72 0.151 0.018 624.73 0.151 0.019 624.74 0.151 0.019 624.75 0.151 0.020 624.76 0.151 0.021 624.77 0.151 0.021 624.78 0.151 0.022 624.79 0.151 0.022 624.80 0.151 0.023 624.81 0.151 0.024 624.82 0.151 0.024 624.83 0.151 0.025 624.84 0.151 0.025 624.85 0.151 0.026 624.86 0.151 0.027 624.87 0.151 0.027 624.88 0.151 0.028 624.89 0.151 0.028 624.90 0.151 0.029 624.91 0.151 0.030 624.92 0.151 0.030 624.93 0.151 0.031 624.94 0.151 0.031 624.95 0.151 0.032 624.96 0.151 0.033 624.97 0.151 0.033 624.98 0.151 0.034 624.99 0.151 0.034 Elevation (feet) Surface (acres) Storage (acre-feet) 625.00 0.151 0.035 625.01 0.151 0.036 625.02 0.151 0.036 625.03 0.151 0.037 625.04 0.151 0.038 625.05 0.151 0.038 625.06 0.151 0.039 625.07 0.151 0.039 625.08 0.151 0.040 625.09 0.151 0.041 625.10 0.151 0.041 625.11 0.151 0.042 625.12 0.151 0.042 625.13 0.151 0.043 625.14 0.151 0.044 625.15 0.151 0.044 625.16 0.151 0.045 625.17 0.151 0.045 625.18 0.151 0.046 625.19 0.151 0.047 625.20 0.151 0.047 625.21 0.151 0.048 625.22 0.151 0.048 625.23 0.151 0.049 625.24 0.151 0.050 625.25 0.151 0.050 625.26 0.151 0.051 625.27 0.151 0.051 625.28 0.151 0.052 625.29 0.151 0.053 625.30 0.151 0.053 625.31 0.151 0.054 625.32 0.151 0.054 625.33 0.151 0.055 625.34 0.151 0.056 625.35 0.151 0.056 625.36 0.151 0.057 625.37 0.151 0.057 625.38 0.151 0.058 625.39 0.151 0.059 625.40 0.151 0.059 625.41 0.151 0.060 625.42 0.151 0.061 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files

058 625.39 0.151 0.059 625.40 0.151 0.059 625.41 0.151 0.060 625.42 0.151 0.061 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.