Stormwater Report 1

14 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 = 10 yrs = 6 min = 1, 2 Peak discharge Time to peak Hyd. volume Contrib. drain. area = 18.33 cfs = 12.20 hrs = 87,232 cuft = 4.680 ac <no description> Q (cfs) Q (cfs) Hyd. No. 3 -- 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 Hyd No. 3 6 8 10 Hyd No. 1 12 14 16 Hyd No. 2 18 20 22 24 26 Time (hrs)

15 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 10.47 6 732 46,463 ------ ------ ------ DA-EX Pervious 2 SCS Runoff 24.24 6 732 121,289 ------ ------ ------ DA-EX Impervious 3 Combine 34.70 6 732 167,752 1, 2 ------ ------ <no description> Proposed - Future Projected.gpw Return Period: 100 Year Monday, 12 / 30 / 2024

16 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 = 10.47 cfs = 100 yrs Time to peak = 12.20 hrs = 6 min Hyd. volume = 46,463 cuft = 1.520 ac Curve number = 80 = 0.0 % Hydraulic length = 0 ft = User Time of conc. (Tc) = 11.70 min = 11.52 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 -- 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 Hyd No. 1 6 8 10 12 14 16 18 20 22 24 26 Time (hrs)

17 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 = 100 yrs Time interval = 6 min = 11.5200 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 - 100 Year 2.00 2.00 1.00 1.00 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

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 = 24.24 cfs = 100 yrs Time to peak = 12.20 hrs = 6 min Hyd. volume = 121,289 cuft = 3.160 ac Curve number = 98 = 0.0 % Hydraulic length = 0 ft = User Time of conc. (Tc) = 11.70 min = 11.52 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 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. 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 = 11.5200 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 2.00 2.00 1.00 1.00 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 = 34.70 cfs = 12.20 hrs = 167,752 cuft = 4.680 ac <no description> Q (cfs) Q (cfs) Hyd. No. 3 -- 100 Year 35.00 35.00 30.00 30.00 25.00 25.00 20.00 20.00 15.00 15.00 10.00 10.00 5.00 5.00 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 - Future Projected.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 4.09 0.00 0.00 6.37 0.00 0.00 11.52

EXISTING VS. PROPOSED RUNOFF RATES oo ©

Time (Min) 0 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120 126 132 138 144 150 156 162 168 174 180 186 192 198 204 210 216 222 228 234 240 TABLE 7 EXISTING VS. PROPOSED RUNOFF RATES - CURRENT ADJUSTED RAINFALL Existing Conditions Proposed Conditions Difference 2-Year 10-Year 100-Year 2-Year 10-Year 100-Year 2-Year 10-Year 100-Year (CFS) (CFS) (CFS) (CFS) (CFS) (CFS) (CFS) (CFS) (CFS) 0 0 0 0 0 0 0.000 0.000 0.000 0 0 0 0 0 0 0.000 0.000 0.000 0 0 0 0 0 0 0.000 0.000 0.000 0 0 0 0 0 0 0.000 0.000 0.000 0 0 0 0 0 0 0.000 0.000 0.000 0 0 0.003225 0 0 0.003069 0.000 0.000 0.000 0 0 0.015587 0 0 0.014836 0.000 0.000 -0.001 0 0 0.036973 0 0 0.035191 0.000 0.000 -0.002 0 0.001798 0.062243 0 0.001712 0.059243 0.000 0.000 -0.003 0 0.007612 0.086874 0 0.007245 0.082687 0.000 0.000 -0.004 0 0.016587 0.109252 0 0.015788 0.103987 0.000 -0.001 -0.005 0.000251 0.026946 0.129527 0.000239 0.025648 0.123285 0.000 -0.001 -0.006 0.001802 0.037058 0.147887 0.001715 0.035272 0.14076 0.000 -0.002 -0.007 0.005251 0.046701 0.164983 0.004998 0.044451 0.157032 0.000 -0.002 -0.008 0.009828 0.055803 0.180575 0.009355 0.053114 0.171872 0.000 -0.003 -0.009 0.014789 0.064426 0.194963 0.014076 0.061321 0.185568 -0.001 -0.003 -0.009 0.019584 0.072561 0.208121 0.01864 0.069064 0.198091 -0.001 -0.003 -0.010 0.02422 0.080286 0.22034 0.023053 0.076417 0.209721 -0.001 -0.004 -0.011 0.028707 0.087635 0.23173 0.027323 0.083412 0.220562 -0.001 -0.004 -0.011 0.033114 0.094804 0.24279 0.031518 0.090235 0.231089 -0.002 -0.005 -0.012 0.037393 0.101662 0.253209 0.035591 0.096762 0.241006 -0.002 -0.005 -0.012 0.04152 0.10814 0.262809 0.039519 0.102928 0.250143 -0.002 -0.005 -0.013 0.045606 0.114535 0.272321 0.043408 0.109016 0.259197 -0.002 -0.006 -0.013 0.049545 0.120581 0.281112 0.047157 0.11477 0.267564 -0.002 -0.006 -0.014 0.053375 0.126394 0.28948 0.050803 0.120302 0.27553 -0.003 -0.006 -0.014 0.057058 0.131874 0.297193 0.054308 0.125519 0.28287 -0.003 -0.006 -0.014 0.060639 0.137149 0.304555 0.057717 0.13054 0.289877 -0.003 -0.007 -0.015 0.064226 0.142451 0.312067 0.061131 0.135586 0.297027 -0.003 -0.007 -0.015 0.067727 0.147581 0.319297 0.064463 0.140468 0.303909 -0.003 -0.007 -0.015 0.071084 0.152413 0.325969 0.067658 0.145068 0.31026 -0.003 -0.007 -0.016 0.07436 0.157091 0.332403 0.070776 0.14952 0.316383 -0.004 -0.008 -0.016 0.077491 0.161481 0.338308 0.073757 0.153699 0.322004