V4 11 Stormwater Report Rev 3 1 26 2023

35 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 3.787 3 723 14,922 ------ ------ ------ DA-1A (Impervious) 2 SCS Runoff 10.61 3 729 43,282 ------ ------ ------ DA-1A (Pervious) 3 Combine 13.83 3 726 58,204 1, 2 ------ ------ DA-1A 4 SCS Runoff 0.437 3 729 1,775 ------ ------ ------ DA-1B 5 SCS Runoff 1.092 3 729 4,438 ------ ------ ------ DA-2 6 SCS Runoff 9.036 3 723 35,610 ------ ------ ------ DA-3 (Impervious) 7 SCS Runoff 3.872 3 729 15,957 ------ ------ ------ DA-3 (Pervious) 8 Combine 12.47 3 726 51,567 6, 7 ------ ------ DA-3 9 SCS Runoff 0.129 3 723 509 ------ ------ ------ DA-4 (Impervious) 10 SCS Runoff 2.996 3 726 10,189 ------ ------ ------ DA-4 (Pervious) 11 Combine 3.122 3 726 10,698 9, 10 ------ ------ DA-4 12 SCS Runoff 2.324 3 723 9,157 ------ ------ ------ DA-5 (Impervious) 13 SCS Runoff 0.797 3 732 5,797 ------ ------ ------ DA-5 (Pervious) 14 Combine 2.844 3 726 14,954 12, 13 ------ ------ DA-5 15 SCS Runoff 14.76 3 723 58,163 ------ ------ ------ DA-6 16 Combine 14.25 3 726 59,979 3, 4, ------ ------ To Basin #1 17 Reservoir 14.01 3 729 59,972 16

DA-6 16 Combine 14.25 3 726 59,979 3, 4, ------ ------ To Basin #1 17 Reservoir 14.01 3 729 59,972 16 419.40 11,764 Basin #1 18 Combine 24.43 3 729 111,539 8, 17 ------ ------ Combined - SS Southern Driveway 19 Combine 45.76 3 726 199,793 5, 11, 14, ------ ------ Total Offsite 15, 18 Existing Conditions.gpw Return Period: 10 Year Wednesday, 11 / 2 / 2022