Stormwater Report 1

PROPOSED CONDITIONS CURRENT ADJUSTED HYDROGRAPHS

Hydraflow Table of Contents Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Proposed - Current Adjusted.gpw Monday, 12 / 30 / 2024 Watershed Model Schematic...................................................................................... 1 Hydrograph Return Period Recap............................................................................. 2 2 - Year Summary Report......................................................................................................................... 3 Hydrograph Reports................................................................................................................... 4 Hydrograph No. 1, SCS Runoff, DA-EX Pervious.................................................................... 4 Precipitation Report............................................................................................................. 5 Hydrograph No. 2, SCS Runoff, DA-EX Impervious................................................................ 6 Precipitation Report............................................................................................................. 7 Hydrograph No. 3, Combine, <no description>........................................................................ 8 10 - Year Summary Report......................................................................................................................... 9 Hydrograph Reports................................................................................................................. 10 Hydrograph No. 1, SCS Runoff, DA-EX Pervious.................................................................. 10 Precipitation Report........................................................................................................... 11 Hydrograph No. 2, SCS Runoff, DA-EX Impervious.............................................................. 12 Precipitation Report........................................................................................................... 13 Hydrograph No. 3, Combine, <no description>...................................................................... 14 100 - Year Summary Report....................................................................................................................... 15 Hydrograph

..................................... 14 100 - Year Summary Report....................................................................................................................... 15 Hydrograph Reports................................................................................................................. 16 Hydrograph No. 1, SCS Runoff, DA-EX Pervious.................................................................. 16 Precipitation Report........................................................................................................... 17 Hydrograph No. 2, SCS Runoff, DA-EX Impervious.............................................................. 18 Precipitation Report........................................................................................................... 19 Hydrograph No. 3, Combine, <no description>...................................................................... 20 IDF Report.................................................................................................................. 21

1 Watershed Model Schematic Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 1 2 3 Legend Hyd. Origin Description 1 2 3 DA-EX Pervious DA-EX Impervious <no description> SCS Runoff SCS Runoff Combine Project: Proposed - Current Adjusted.gpw Monday, 12 / 30 / 2024

2 Hydrograph Return Period Recap Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Hyd. Hydrograph No. type (origin) Inflow hyd(s) Peak Outflow (cfs) 1-yr 2-yr 3-yr 5-yr 10-yr Hydrograph Description 25-yr 50-yr 100-yr 1 SCS Runoff ------ ------- 1.954 ------- ------- 3.915 ------- ------- 7.971 DA-EX Pervious 2 SCS Runoff ------ ------- 7.225 ------- ------- 11.27 ------- ------- 19.30 DA-EX Impervious 3 Combine 1, 2 ------- 9.179 ------- ------- 15.19 ------- ------- 27.27 <no description> Proj. file: Proposed - Current Adjusted.gpw Monday, 12 / 30 / 2024

3 Hydrograph Summary Report Hyd. Hydrograph No. type (origin) Peak flow (cfs) Time Time to interval Peak (min) (min) Hyd. volume (cuft) Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Inflow hyd(s) Maximum elevation (ft) Total strge used (cuft) Hydrograph Description 1 SCS Runoff 1.954 6 732 8,342 ------ ------ ------ DA-EX Pervious 2 SCS Runoff 7.225 6 732 34,806 ------ ------ ------ DA-EX Impervious 3 Combine 9.179 6 732 43,147 1, 2 ------ ------ <no description> Proposed - Current Adjusted.gpw Return Period: 2 Year Monday, 12 / 30 / 2024

4 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Monday, 12 / 30 / 2024 Hyd. No. 1 DA-EX Pervious Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff Peak discharge = 1.954 cfs = 2 yrs Time to peak = 12.20 hrs = 6 min Hyd. volume = 8,342 cuft = 1.520 ac Curve number = 80 = 0.0 % Hydraulic length = 0 ft = User Time of conc. (Tc) = 12.60 min = 3.47 in Distribution = Custom = S:\Petry Engineering Cad Projects\2024\24-170 Shape factor - Baginski = 484 - Manor - West Orange DA-EX Pervious Q (cfs) Q (cfs) Hyd. No. 1 -- 2 Year 2.00 2.00 1.00 1.00 0.00 0.00 0 2 4 Hyd No. 1 6 8 10 12 14 16 18 20 22 24 26 Time (hrs)

5 Precipitation Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Monday, 12 / 30 / 2024 Hyd. No. 1 DA-EX Pervious Storm Frequency Total precip. Storm duration = 2 yrs Time interval = 6 min = 3.4700 in Distribution = Custom = S:\Petry Engineering Cad Projects\2024\24-170 - Baginski - Manor - West Orang Incremental Rainfall Precipitation Precip (in) Precip (in) Hyd. No. 1 : DA-EX Pervious - 2 Year 0.50 0.50 0.45 0.45 0.40 0.40 0.35 0.35 0.30 0.30 0.25 0.25 0.20 0.20 0.15 0.15 0.10 0.10 0.05 0.05 0.00 0.00 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 Time (hrs) Custom Design Storm -- S:\Petry Engineering Cad Projects\2024\24-170 - Baginski - Manor - West Orange\Civil\Curre

6 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Monday, 12 / 30 / 2024 Hyd. No. 2 DA-EX Impervious Hydrograph type Storm frequency Time interval Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff Peak discharge = 7.225 cfs = 2 yrs Time to peak = 12.20 hrs = 6 min Hyd. volume = 34,806 cuft = 3.160 ac Curve number = 98 = 0.0 % Hydraulic length = 0 ft = User Time of conc. (Tc) = 12.60 min = 3.47 in Distribution = Custom = S:\Petry Engineering Cad Projects\2024\24-170 Shape factor - Baginski = 484 - Manor - West Orange DA-EX Impervious Q (cfs) Q (cfs) Hyd. No. 2 -- 2 Year 8.00 8.00 6.00 6.00 4.00 4.00 2.00 2.00 0.00 0.00 0 2 4 Hyd No. 2 6 8 10 12 14 16 18 20 22 24 26 Time (hrs)

7 Precipitation Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Monday, 12 / 30 / 2024 Hyd. No. 2 DA-EX Impervious Storm Frequency Total precip. Storm duration = 2 yrs Time interval = 6 min = 3.4700 in Distribution = Custom = S:\Petry Engineering Cad Projects\2024\24-170 - Baginski - Manor - West Orang Incremental Rainfall Precipitation Precip (in) Precip (in) Hyd. No. 2 : DA-EX Impervious - 2 Year 0.50 0.50 0.45 0.45 0.40 0.40 0.35 0.35 0.30 0.30 0.25 0.25 0.20 0.20 0.15 0.15 0.10 0.10 0.05 0.05 0.00 0.00 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 Time (hrs) Custom Design Storm -- S:\Petry Engineering Cad Projects\2024\24-170 - Baginski - Manor - West Orange\Civil\Curre