Stormwater Report 1

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 ------ ------- 2.304 ------- ------- 4.442 ------- ------- 9.365 DA-EX Pervious 2 SCS Runoff ------ ------- 8.974 ------- ------- 14.04 ------- ------- 25.46 DA-EX Impervious 3 Combine 1, 2 ------- 11.28 ------- ------- 18.49 ------- ------- 34.83 <no description> Proj. file: Existing - Future Projected.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 2.304 6 732 9,795 ------ ------ ------ DA-EX Pervious 2 SCS Runoff 8.974 6 732 43,554 ------ ------ ------ DA-EX Impervious 3 Combine 11.28 6 732 53,349 1, 2 ------ ------ <no description> Existing - Future Projected.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 = 2.304 cfs = 2 yrs Time to peak = 12.20 hrs = 6 min Hyd. volume = 9,795 cuft = 1.360 ac Curve number = 80 = 0.0 % Hydraulic length = 0 ft = User Time of conc. (Tc) = 13.60 min = 4.09 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 3.00 3.00 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 = 4.0900 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 = 8.974 cfs = 2 yrs Time to peak = 12.20 hrs = 6 min Hyd. volume = 43,554 cuft = 3.320 ac Curve number = 98 = 0.0 % Hydraulic length = 0 ft = User Time of conc. (Tc) = 13.60 min = 4.09 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 10.00 10.00 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 = 4.0900 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

8 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Monday, 12 / 30 / 2024 Hyd. No. 3 <no description> Hydrograph type Storm frequency Time interval Inflow hyds. = Combine = 2 yrs = 6 min = 1, 2 Peak discharge Time to peak Hyd. volume Contrib. drain. area = 11.28 cfs = 12.20 hrs = 53,349 cuft = 4.680 ac <no description> Q (cfs) Q (cfs) Hyd. No. 3 -- 2 Year 12.00 12.00 10.00 10.00 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. 3 6 8 10 Hyd No. 1 12 14 16 Hyd No. 2 18 20 22 24 26 Time (hrs)

9 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 4.442 6 732 19,053 ------ ------ ------ DA-EX Pervious 2 SCS Runoff 14.04 6 732 69,275 ------ ------ ------ DA-EX Impervious 3 Combine 18.49 6 732 88,329 1, 2 ------ ------ <no description> Existing - Future Projected.gpw Return Period: 10 Year Monday, 12 / 30 / 2024

10 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 = 4.442 cfs = 10 yrs Time to peak = 12.20 hrs = 6 min Hyd. volume = 19,053 cuft = 1.360 ac Curve number = 80 = 0.0 % Hydraulic length = 0 ft = User Time of conc. (Tc) = 13.60 min = 6.37 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 -- 10 Year 5.00 5.00 4.00 4.00 3.00 3.00 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)

11 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 = 10 yrs Time interval = 6 min = 6.3700 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 - 10 Year 1.00 1.00 0.90 0.90 0.80 0.80 0.70 0.70 0.60 0.60 0.50 0.50 0.40 0.40 0.30 0.30 0.20 0.20 0.10 0.10 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