Stormwater Report 1

18 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 = 19.30 cfs = 100 yrs Time to peak = 12.20 hrs = 6 min Hyd. volume = 96,135 cuft = 3.160 ac Curve number = 98 = 0.0 % Hydraulic length = 0 ft = User Time of conc. (Tc) = 12.60 min = 9.18 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 -- 100 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 Hyd No. 2 6 8 10 12 14 16 18 20 22 24 26 Time (hrs)

19 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 = 100 yrs Time interval = 6 min = 9.1800 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 - 100 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

20 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 = 100 yrs = 6 min = 1, 2 Peak discharge Time to peak Hyd. volume Contrib. drain. area = 27.27 cfs = 12.20 hrs = 130,994 cuft = 4.680 ac <no description> Q (cfs) Q (cfs) Hyd. No. 3 -- 100 Year 28.00 28.00 24.00 24.00 20.00 20.00 16.00 16.00 12.00 12.00 8.00 8.00 4.00 4.00 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)

21 Hydraflow Rainfall Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Monday, 12 / 30 / 2024 Return Period Intensity-Duration-Frequency Equation Coefficients (FHA) (Yrs) B D E (N/A) 1 0.0000 0.0000 0.0000 -------- 2 69.8703 13.1000 0.8658 -------- 3 0.0000 0.0000 0.0000 -------- 5 79.2597 14.6000 0.8369 -------- 10 88.2351 15.5000 0.8279 -------- 25 102.6072 16.5000 0.8217 -------- 50 114.8193 17.2000 0.8199 -------- 100 127.1596 17.8000 0.8186 -------- File name: SampleFHA.idf Intensity = B / (Tc + D)^E Return Period (Yrs) Intensity Values (in/hr) 5 min 10 15 20 25 30 35 40 45 50 55 60 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2 5.69 4.61 3.89 3.38 2.99 2.69 2.44 2.24 2.07 1.93 1.81 1.70 3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5 6.57 5.43 4.65 4.08 3.65 3.30 3.02 2.79 2.59 2.42 2.27 2.15 10 7.24 6.04 5.21 4.59 4.12 3.74 3.43 3.17 2.95 2.77 2.60 2.46 25 8.25 6.95 6.03 5.34 4.80 4.38 4.02 3.73 3.48 3.26 3.07 2.91 50 9.04 7.65 6.66 5.92 5.34 4.87 4.49 4.16 3.88 3.65 3.44 3.25 100 9.83 8.36 7.30 6.50 5.87 5.36 4.94 4.59 4.29 4.03 3.80 3.60 Tc = time in minutes. Values may exceed 60. Projects\2024\24-170 - Baginski - Manor - West Orange\Civil\Current\Stormwater\Essex County - Current Adjusted.pcp Rainfall Precipitation Table (in) Storm Distribution 1-yr 2-yr 3-yr 5-yr 10-yr 25-yr 50-yr 100-yr SCS 24-hour 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 SCS 6-Hr 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-1st 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-2nd 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-3rd 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-4th 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-Indy 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Custom 0.00 3.47 0.00 0.00 5.38 0.00 0.00 9.18

PROPOSED CONDITIONS FUTURE PROJECTED HYDROGRAPHS

Hydraflow Table of Contents Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Proposed - Future Projected.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 - Future Projected.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 ------ ------- 2.575 ------- ------- 4.965 ------- ------- 10.47 DA-EX Pervious 2 SCS Runoff ------ ------- 8.541 ------- ------- 13.37 ------- ------- 24.24 DA-EX Impervious 3 Combine 1, 2 ------- 11.12 ------- ------- 18.33 ------- ------- 34.70 <no description> Proj. file: Proposed - 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 2.575 6 732 10,947 ------ ------ ------ DA-EX Pervious 2 SCS Runoff 8.541 6 732 41,455 ------ ------ ------ DA-EX Impervious 3 Combine 11.12 6 732 52,402 1, 2 ------ ------ <no description> Proposed - Future Projected.gpw Return Period: 2 Year Monday, 12 / 30 / 2024