V4 11 Stormwater Report Rev 3 1 26 2023

35 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Friday, 01 / 27 / 2023 Hyd. No. 19 <no description> Hydrograph type = Reservoir Peak discharge = 1.551 cfs Storm frequency = 2 yrs Time to peak = 12.20 hrs Time interval = 3 min Hyd. volume = 10,585 cuft Inflow hyd. No. = 18 - <no description> Max. Elevation = 421.35 ft Reservoir name = Basin #1A Max. Storage = 1,344 cuft Storage Indication method used. <no description> Q (cfs) Q (cfs) Hyd. No. 19 -- 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. 19 Hyd No. 18 Total storage used = 1,344 cuft

36 Pond Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Friday, 01 / 27 / 2023 Pond No. 4 - Basin #1A Pond Data UG Chambers -Invert elev. = 418.00 ft, Rise x Span = 4.00 x 4.00 ft, Barrel Len = 60.00 ft, No. Barrels = 2, Slope = 0.00%, Headers = No Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft) 0.00 418.00 n/a 0 0 0.40 418.40 n/a 78 78 0.80 418.80 n/a 136 215 1.20 419.20 n/a 166 381 1.60 419.60 n/a 183 563 2.00 420.00 n/a 191 754 2.40 420.40 n/a 191 945 2.80 420.80 n/a 183 1,128 3.20 421.20 n/a 166 1,294 3.60 421.60 n/a 136 1,430 4.00 422.00 n/a 78 1,508 Culvert / Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise (in) = 4.00 0.00 0.00 0.00 Crest

[PrfRsr] [A] [B] [C] [D] Rise (in) = 4.00 0.00 0.00 0.00 Crest Len (ft) = 4.00 0.00 0.00 0.00 Span (in) = 6.50 0.00 0.00 0.00 Crest El. (ft) = 421.40 0.00 0.00 0.00 No. Barrels = 1 0 0 0 Weir Coeff. = 3.33 3.33 3.33 3.33 Invert El. (ft) = 418.00 0.00 0.00 0.00 Weir Type = Rect --- --- --- Length (ft) = 0.00 0.00 0.00 0.00 Multi-Stage = No No No No Slope (%) = 0.00 0.00 0.00 n/a N-Value = .013 .013 .013 n/a Orifice Coeff. = 0.60 0.60 0.60 0.60 Exfil.(in/hr) = 0.000 (by Wet area) Multi-Stage = n/a No No No TW Elev. (ft) = 0.00 Note: Culvert/Orifice outflows are analyzed under inlet (ic) and outlet (oc) control. Weir risers checked for orifice conditions (ic) and submergence (s). Stage / Storage / Discharge Table Stage Storage Elevation Clv A Clv B Clv C PrfRsr Wr A Wr B Wr C Wr D Exfil User Total ft cuft ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 0.00 0 418.00 0.00 --- --- --- 0.00 --- --- --- --- --- 0.000 0.40 78 418.40 0.42 ic --- --- --- 0.00 --- --- --- --- --- 0.420 0.80

78 418.40 0.42 ic --- --- --- 0.00 --- --- --- --- --- 0.420 0.80 215 418.80 0.69 ic --- --- --- 0.00 --- --- --- --- --- 0.692 1.20 381 419.20 0.88 ic --- --- --- 0.00 --- --- --- --- --- 0.884 1.60 563 419.60 1.04 ic --- --- --- 0.00 --- --- --- --- --- 1.041 2.00 754 420.00 1.18 ic --- --- --- 0.00 --- --- --- --- --- 1.177 2.40 945 420.40 1.30 ic --- --- --- 0.00 --- --- --- --- --- 1.299 2.80 1,128 420.80 1.41 ic --- --- --- 0.00 --- --- --- --- --- 1.411 3.20 1,294 421.20 1.51 ic --- --- --- 0.00 --- --- --- --- --- 1.514 3.60 1,430 421.60 1.61 ic --- --- --- 1.19 --- --- --- --- --- 2.802 4.00 1,508 422.00 1.70 ic --- --- --- 6.19 --- --- --- --- --- 7.893

37 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Friday, 01 / 27 / 2023 Hyd. No. 20 <no description> Hydrograph type = Combine Peak discharge = 14.72 cfs Storm frequency = 2 yrs Time to peak = 12.15 hrs Time interval = 3 min Hyd. volume = 108,294 cuft Inflow hyds. = 8, 11, 12, 14, 19 Contrib. drain. area = 0.000 ac <no description> Q (cfs) Q (cfs) Hyd. No. 20 -- 2 Year 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 3 6 9 12 15 18 21 24 27 Time (hrs) Hyd No. 20 Hyd No. 8 Hyd No. 11 Hyd No. 12 Hyd No. 14 Hyd No. 19

38 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 4.321 3 723 16,256 ------ ------ ------ DA-1A (Roof) 2 SCS Runoff 6.540 3 729 26,367 ------ ------ ------ DA-2 (Pervious) 3 SCS Runoff 5.594 3 723 22,044 ------ ------ ------ DA-2 (Impervious) 4 SCS Runoff 11.79 3 729 47,462 ------ ------ ------ DA-3 (Pervious) 5 SCS Runoff 6.239 3 723 24,588 ------ ------ ------ DA-3 (Impervious) 6 SCS Runoff 3.696 3 729 17,827 ------ ------ ------ DA-4 (Pervious) 7 SCS Runoff 4.948 3 723 19,501 ------ ------ ------ DA-4 (Impervious) 8 Combine 11.76 3 726 48,412 2, 3, ------ ------ DA-2 9 Combine 17.48 3 726 72,050 4, 5, ------ ------ DA-3 10 Combine 8.123 3 726 37,327 6, 7, ------ ------ DA-4 11 Reservoir 5.430 3 732 37,326 10 418.09 5,539 Basin #3 12 Reservoir 14.78 3 732 72,049 9 416.78 9,392 Basin #2 13 SCS Runoff 7.253 3 723 26,949 ------ ------ ------ DA-1B (Roof) 14 Reservoir 8.143 3 726 26,949 13 407.73 2,934 Basin #1B 15 SCS Runoff 0.092 3 723 315 ------ ------ ------ DA-1A (Courtyard Pervious) 16 SCS Runoff 0.129 3 723 509 ------ ------ ------ DA-1A (Courtyard Impervious) 17 Combine 0.221 3

DA-1A (Courtyard Pervious) 16 SCS Runoff 0.129 3 723 509 ------ ------ ------ DA-1A (Courtyard Impervious) 17 Combine 0.221 3 723 824 15, 16 ------ ------ <no description> 18 Combine 4.542 3 723 17,079 1, 17 ------ ------ <no description> 19 Reservoir 5.092 3 726 17,079 18 421.80 1,470 <no description> 20 Combine 39.24 3 726 201,813 8, 11, 12, ------ ------ <no description> 14, 19 Proposed Conditions - Green Roof.gpw Return Period: 10 Year Friday, 01 / 27 / 2023

39 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 = 4.321 cfs Storm frequency = 10 yrs Time to peak = 12.05 hrs Time interval = 3 min Hyd. volume = 16,256 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. = 5.22 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 -- 10 Year 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 3 6 9 12 15 18 21 24 27 Time (hrs)

9 12 15 18 21 24 27 Time (hrs) Hyd No. 1

40 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 = 10 yrs Time interval = 3 min Total precip. = 5.2200 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) - 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 0.15 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