2025 12 19 Stormwater Report Rev 1

10 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2025 Tuesday, 12 / 23 / 2025 Hyd. No. 4 DA-2 Impervious Hydrograph type = SCS Runoff Peak discharge = 0.108 cfs Storm frequency = 2 yrs Time to peak = 12.20 hrs Time interval = 6 min Hyd. volume = 525 cuft Drainage area = 0.040 ac Curve number = 98 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 12.60 min Total precip. = 4.09 in Distribution = Custom Storm duration = S:\Petry Engineering Cad Projects\2024\24-170 Shape factor - Baginski = 484 - Manor - West Orange DA-2 Impervious Q (cfs) Q (cfs) Hyd. No. 4 -- 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

0.25 0.20 0.20 0.15 0.15 0.10 0.10 0.05 0.05 0.00 0.00 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Time (hrs) Hyd No. 4

11 Precipitation Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2025 Tuesday, 12 / 23 / 2025 Hyd. No. 4 DA-2 Impervious Storm Frequency = 2 yrs Time interval = 6 min Total precip. = 4.0900 in Distribution = Custom Storm duration = S:\Petry Engineering Cad Projects\2024\24-170 - Baginski - Manor - West Orang Incremental Rainfall Precipitation Precip (in) Precip (in) Hyd. No. 4 : DA-2 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

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

12 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2025 Tuesday, 12 / 23 / 2025 Hyd. No. 5 <no description> Hydrograph type = Combine Peak discharge = 11.05 cfs Storm frequency = 2 yrs Time to peak = 12.20 hrs Time interval = 6 min Hyd. volume = 51,988 cuft Inflow hyds. = 1, 2 Contrib. drain. area = 4.680 ac <no description> Q (cfs) Q (cfs) Hyd. No. 5 -- 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 6 8 10 12 14 16 18 20 22 24 26 Time (hrs) Hyd No. 5 Hyd No. 1 Hyd No. 2

13 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2025 Tuesday, 12 / 23 / 2025 Hyd. No. 6 <no description> Hydrograph type = Combine Peak discharge = 0.345 cfs Storm frequency = 2 yrs Time to peak = 12.20 hrs Time interval = 6 min Hyd. volume = 1,533 cuft Inflow hyds. = 3, 4 Contrib. drain. area = 0.180 ac <no description> Q (cfs) Q (cfs) Hyd. No. 6 -- 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

0.05 0.00 0.00 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Time (hrs) Hyd No. 6 Hyd No. 3 Hyd No. 4

14 Hydrograph Summary Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2025 Hyd. Hydrograph Peak Time Time to Hyd. Inflow Maximum Total Hydrograph No. type flow interval Peak volume hyd(s) elevation strge used Description (origin) (cfs) (min) (min) (cuft) (ft) (cuft) 1 SCS Runoff 5.194 6 732 22,275 ------ ------ ------ DA-1 Pervious 2 SCS Runoff 13.07 6 732 64,476 ------ ------ ------ DA-1 Impervious 3 SCS Runoff 0.457 6 732 1,961 ------ ------ ------ DA-1 Pervious 4 SCS Runoff 0.169 6 732 835 ------ ------ ------ DA-2 Impervious 5 Combine 18.27 6 732 86,752 1, 2, ------ ------ <no description> 6 Combine 0.627 6 732 2,796 3, 4, ------ ------ <no description> Proposed - Future Projected.gpw Return Period: 10 Year Tuesday, 12 / 23 / 2025

15 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2025 Tuesday, 12 / 23 / 2025 Hyd. No. 1 DA-1 Pervious Hydrograph type = SCS Runoff Peak discharge = 5.194 cfs Storm frequency = 10 yrs Time to peak = 12.20 hrs Time interval = 6 min Hyd. volume = 22,275 cuft Drainage area = 1.590 ac Curve number = 80 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 11.70 min Total precip. = 6.37 in Distribution = Custom Storm duration = S:\Petry Engineering Cad Projects\2024\24-170 Shape factor - Baginski = 484 - Manor - West Orange DA-1 Pervious Q (cfs) Q (cfs) Hyd. No. 1 -- 10 Year 6.00 6.00 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

1.00 0.00 0.00 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Time (hrs) Hyd No. 1