V4 11 Stormwater Report Rev 3 1 26 2023

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