V4 11 Stormwater Report Rev 3 1 26 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