2025 12 19 Stormwater Report Rev 1

21 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 = 0.169 cfs Storm frequency = 10 yrs Time to peak = 12.20 hrs Time interval = 6 min Hyd. volume = 835 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. = 6.37 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 -- 10 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

22 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 = 10 yrs Time interval = 6 min Total precip. = 6.3700 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 - 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

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

23 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 = 18.27 cfs Storm frequency = 10 yrs Time to peak = 12.20 hrs Time interval = 6 min Hyd. volume = 86,752 cuft Inflow hyds. = 1, 2 Contrib. drain. area = 4.680 ac <no description> Q (cfs) Q (cfs) Hyd. No. 5 -- 10 Year 21.00 21.00 18.00 18.00 15.00 15.00 12.00 12.00 9.00 9.00 6.00 6.00 3.00 3.00 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

Time (hrs) Hyd No. 5 Hyd No. 1 Hyd No. 2

24 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 = 0.627 cfs Storm frequency = 10 yrs Time to peak = 12.20 hrs Time interval = 6 min Hyd. volume = 2,796 cuft Inflow hyds. = 3, 4 Contrib. drain. area = 0.180 ac <no description> Q (cfs) Q (cfs) Hyd. No. 6 -- 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

0.10 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

25 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 10.95 6 732 48,603 ------ ------ ------ DA-1 Pervious 2 SCS Runoff 23.70 6 732 118,602 ------ ------ ------ DA-1 Impervious 3 SCS Runoff 0.964 6 732 4,279 ------ ------ ------ DA-1 Pervious 4 SCS Runoff 0.307 6 732 1,535 ------ ------ ------ DA-2 Impervious 5 Combine 34.65 6 732 167,205 1, 2, ------ ------ <no description> 6 Combine 1.271 6 732 5,815 3, 4, ------ ------ <no description> Proposed - Future Projected.gpw Return Period: 100 Year Tuesday, 12 / 23 / 2025

26 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 = 10.95 cfs Storm frequency = 100 yrs Time to peak = 12.20 hrs Time interval = 6 min Hyd. volume = 48,603 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. = 11.52 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 -- 100 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