V4 11 Stormwater Report Rev 3 1 26 2023

.................................................. 57 Hydrograph No. 13, SCS Runoff, DA-1B (Roof).................................................................... 58 Precipitation Report........................................................................................................... 59 Hydrograph No. 14, Reservoir, Basin #1B............................................................................. 60 Hydrograph No. 15, SCS Runoff, DA-1A (Courtyard Pervious)............................................. 61 Precipitation Report........................................................................................................... 62 Hydrograph No. 16, SCS Runoff, DA-1A (Courtyard Impervious).......................................... 63 Precipitation Report........................................................................................................... 64 Hydrograph No. 17, Combine, <no description>.................................................................... 65 Hydrograph No. 18, Combine, <no description>.................................................................... 66 Hydrograph No. 19, Reservoir, <no description>................................................................... 67 Hydrograph No. 20, Combine, <no description>.................................................................... 68 100 - Year Summary Report....................................................................................................................... 69 Hydrograph Reports................................................................................................................. 70 Hydrograph No. 1, SCS Runoff, DA-1A (Roof)....................................................................... 70 Precipitation Report........................................................................................................... 71 Hydrograph No. 2, SCS Runoff, DA-2 (Pervious).................................................................. 72 Precipitation Report........................................................................................................... 73 Hydrograph No. 3, SCS Runoff, DA-2 (Impervious)............................................................... 74

..................................................................... 73 Hydrograph No. 3, SCS Runoff, DA-2 (Impervious)............................................................... 74 Precipitation Report........................................................................................................... 75 Hydrograph No. 4, SCS Runoff, DA-3 (Pervious).................................................................. 76 Precipitation Report........................................................................................................... 77 Hydrograph No. 5, SCS Runoff, DA-3 (Impervious)............................................................... 78 Precipitation Report........................................................................................................... 79 Hydrograph No. 6, SCS Runoff, DA-4 (Pervious).................................................................. 80 Precipitation Report........................................................................................................... 81 Hydrograph No. 7, SCS Runoff, DA-4 (Impervious)............................................................... 82 Precipitation Report........................................................................................................... 83 Hydrograph No. 8, Combine, DA-2........................................................................................ 84 Hydrograph No. 9, Combine, DA-3........................................................................................ 85 Hydrograph No. 10, Combine, DA-4...................................................................................... 86 Hydrograph No. 11, Reservoir, Basin #3................................................................................ 87 Hydrograph No. 12, Reservoir, Basin #2................................................................................ 88 Hydrograph No. 13, SCS Runoff, DA-1B (Roof).................................................................... 89

Contents continued... Proposed Conditions - Green Roof.gpw Precipitation Report........................................................................................................... 90 Hydrograph No. 14, Reservoir, Basin #1B............................................................................. 91 Hydrograph No. 15, SCS Runoff, DA-1A (Courtyard Pervious)............................................. 92 Precipitation Report........................................................................................................... 93 Hydrograph No. 16, SCS Runoff, DA-1A (Courtyard Impervious).......................................... 94 Precipitation Report........................................................................................................... 95 Hydrograph No. 17, Combine, <no description>.................................................................... 96 Hydrograph No. 18, Combine, <no description>.................................................................... 97 Hydrograph No. 19, Reservoir, <no description>................................................................... 98 Hydrograph No. 20, Combine, <no description>.................................................................... 99 IDF Report................................................................................................................ 100

1 Watershed Model Schematic Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 2 3 16 13 4 5 7 1 15 6 17 9 18 10 19 11 14 12 8 Legend Hyd. Origin Description 1 SCS Runoff DA-1A (Roof) 2 SCS Runoff DA-2 (Pervious) 3 SCS Runoff DA-2 (Impervious) 4 SCS Runoff DA-3 (Pervious) 5 SCS Runoff DA-3 (Impervious) 6 SCS Runoff DA-4 (Pervious) 7 SCS Runoff DA-4 (Impervious) 8 Combine DA-2 9 Combine DA-3 10 Combine DA-4 11 Reservoir Basin #3 12 Reservoir Basin #2 13 SCS Runoff DA-1B (Roof) 20 14 Reservoir Basin #1B 15 SCS Runoff DA-1A (Courtyard Pervious) 16 SCS Runoff DA-1A (Courtyard Impervious) 17 Combine <no description> 18 Combine <no description> 19 Reservoir <no description> 20 Combine <no description> Project: Proposed Conditions - Green Roof.gpw Friday, 01 / 27 / 2023

2 Hydrograph Return Period Recap Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Hyd. Hydrograph Inflow Peak Outflow (cfs) Hydrograph No. type hyd(s) Description (origin) 1-yr 2-yr 3-yr 5-yr 10-yr 25-yr 50-yr 100-yr 1 SCS Runoff ------ ------- 2.759 ------- ------- 4.321 5.382 ------- 7.302 DA-1A (Roof) 2 SCS Runoff ------ ------- 2.804 ------- ------- 6.540 9.358 ------- 14.72 DA-2 (Pervious) 3 SCS Runoff ------ ------- 3.663 ------- ------- 5.594 6.914 ------- 9.312 DA-2 (Impervious) 4 SCS Runoff ------ ------- 5.185 ------- ------- 11.79 16.74 ------- 26.10 DA-3 (Pervious) 5 SCS Runoff ------ ------- 4.085 ------- ------- 6.239 7.711 ------- 10.39 DA-3 (Impervious) 6 SCS Runoff ------ ------- 0.475 ------- ------- 3.696 6.756 ------- 13.24 DA-4 (Pervious) 7 SCS Runoff ------ ------- 3.240 ------- ------- 4.948 6.116 ------- 8.237 DA-4 (Impervious) 8 Combine 2, 3, ------- 6.202 ------- ------- 11.76 15.84 ------- 23.52 DA-2 9 Combine 4, 5, ------- 8.874 ------- ------- 17.48 23.83 ------- 35.79 DA-3 10 Combine 6, 7, ------- 3.362 ------- ------- 8.123 12.23 ------- 20.65 DA-4 11 Reservoir 10 ------- 1.497 ------- ------- 5.430 9.569 ------- 15.74 Basin #3 12 Reservoir 9 ------- 4.761 ------- ------- 14.78 21.66 ------- 31.90 Basin #2 13 SCS Runoff ------ ------- 4.580 ------- ------- 7.253 9.066 ------- 12.34 DA-1B (Roof) 14 Reservoir 13 ------- 2.090 ------- ------- 8.143 9.263 ------- 12.33 Basin #1B

------- 7.253 9.066 ------- 12.34 DA-1B (Roof) 14 Reservoir 13 ------- 2.090 ------- ------- 8.143 9.263 ------- 12.33 Basin #1B 15 SCS Runoff ------ ------- 0.048 ------- ------- 0.092 0.123 ------- 0.182 DA-1A (Courtyard Pervious) 16 SCS Runoff ------ ------- 0.085 ------- ------- 0.129 0.160 ------- 0.215 DA-1A (Courtyard Impervious) 17 Combine 15, 16 ------- 0.131 ------- ------- 0.221 0.283 ------- 0.397 <no description> 18 Combine 1, 17 ------- 2.890 ------- ------- 4.542 5.665 ------- 7.698 <no description> 19 Reservoir 18 ------- 1.551 ------- ------- 5.092 5.876 ------- 7.726 <no description> 20 Combine 8, 11, 12, ------- 14.72 ------- ------- 39.24 57.06 ------- 86.61 <no description> 14, 19 Proj. file: Proposed Conditions - Green Roof.gpw Friday, 01 / 27 / 2023

3 Hydrograph Summary Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 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 2.759 3 723 10,096 ------ ------ ------ DA-1A (Roof) 2 SCS Runoff 2.804 3 729 11,841 ------ ------ ------ DA-2 (Pervious) 3 SCS Runoff 3.663 3 723 14,186 ------ ------ ------ DA-2 (Impervious) 4 SCS Runoff 5.185 3 729 21,678 ------ ------ ------ DA-3 (Pervious) 5 SCS Runoff 4.085 3 723 15,823 ------ ------ ------ DA-3 (Impervious) 6 SCS Runoff 0.475 3 738 5,095 ------ ------ ------ DA-4 (Pervious) 7 SCS Runoff 3.240 3 723 12,550 ------ ------ ------ DA-4 (Impervious) 8 Combine 6.202 3 726 26,028 2, 3, ------ ------ DA-2 9 Combine 8.874 3 726 37,501 4, 5, ------ ------ DA-3 10 Combine 3.362 3 726 17,644 6, 7, ------ ------ DA-4 11 Reservoir 1.497 3 738 17,643 10 417.07 2,825 Basin #3 12 Reservoir 4.761 3 738 37,500 9 415.75 5,922 Basin #2 13 SCS Runoff 4.580 3 723 16,539 ------ ------ ------ DA-1B (Roof) 14 Reservoir 2.090 3 732 16,539 13 407.13 2,550 Basin #1B 15 SCS Runoff 0.048 3 726 162 ------ ------ ------ DA-1A (Courtyard Pervious) 16 SCS Runoff 0.085 3 723 327 ------ ------ ------ DA-1A (Courtyard Impervious) 17 Combine 0.131 3

DA-1A (Courtyard Pervious) 16 SCS Runoff 0.085 3 723 327 ------ ------ ------ DA-1A (Courtyard Impervious) 17 Combine 0.131 3 723 490 15, 16 ------ ------ <no description> 18 Combine 2.890 3 723 10,585 1, 17 ------ ------ <no description> 19 Reservoir 1.551 3 732 10,585 18 421.35 1,344 <no description> 20 Combine 14.72 3 729 108,294 8, 11, 12, ------ ------ <no description> 14, 19 Proposed Conditions - Green Roof.gpw Return Period: 2 Year Friday, 01 / 27 / 2023

4 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Friday, 01 / 27 / 2023 Hyd. No. 1 DA-1A (Roof) Hydrograph type = SCS Runoff Peak discharge = 2.759 cfs Storm frequency = 2 yrs Time to peak = 12.05 hrs Time interval = 3 min Hyd. volume = 10,096 cuft Drainage area = 1.030 ac Curve number = 95 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 6.00 min Total precip. = 3.44 in Distribution = Custom Storm duration = S:\Petry Engineering Cad Projects\2019\19 Shape factor 0265 Daughters = 484 of Israel - West Oran DA-1A (Roof) 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 3 6 9 12 15 18 21 24 27 Time (hrs) Hyd No. 1

5 Precipitation Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Friday, 01 / 27 / 2023 Hyd. No. 1 DA-1A (Roof) Storm Frequency = 2 yrs Time interval = 3 min Total precip. = 3.4400 in Distribution = Custom Storm duration = S:\Petry Engineering Cad Projects\2019\19 0265 Daughters of Israel - West Ora Incremental Rainfall Precipitation Precip (in) Precip (in) Hyd. No. 1 : DA-1A (Roof) - 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 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0