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 2.479 3 723 9,603 ------ ------ ------ DA-1A (Impervious) 2 SCS Runoff 4.032 3 729 18,052 ------ ------ ------ DA-1A (Pervious) 3 Combine 6.121 3 726 27,655 1, 2 ------ ------ DA-1A 4 SCS Runoff 0.172 3 729 755 ------ ------ ------ DA-1B 5 SCS Runoff 0.429 3 729 1,888 ------ ------ ------ DA-2 6 SCS Runoff 5.917 3 723 22,917 ------ ------ ------ DA-3 (Impervious) 7 SCS Runoff 1.361 3 729 6,384 ------ ------ ------ DA-3 (Pervious) 8 Combine 6.988 3 726 29,300 6, 7 ------ ------ DA-3 9 SCS Runoff 0.085 3 723 327 ------ ------ ------ DA-4 (Impervious) 10 SCS Runoff 1.365 3 726 4,731 ------ ------ ------ DA-4 (Pervious) 11 Combine 1.447 3 726 5,058 9, 10 ------ ------ DA-4 12 SCS Runoff 1.521 3 723 5,893 ------ ------ ------ DA-5 (Impervious) 13 SCS Runoff 0.039 3 795 1,059 ------ ------ ------ DA-5 (Pervious) 14 Combine 1.521 3 723 6,952 12, 13 ------ ------ DA-5 15 SCS Runoff 9.664 3 723 37,430 ------ ------ ------ DA-6 16 Combine 6.280 3 726 28,410 3, 4, ------ ------ To Basin #1 17 Reservoir 1.473 3 765 28,403 16

DA-6 16 Combine 6.280 3 726 28,410 3, 4, ------ ------ To Basin #1 17 Reservoir 1.473 3 765 28,403 16 419.06 10,296 Basin #1 18 Combine 7.343 3 726 57,703 8, 17 ------ ------ Combined - SS Southern Driveway 19 Combine 20.08 3 723 109,031 5, 11, 14, ------ ------ Total Offsite 15, 18 Existing Conditions.gpw Return Period: 2 Year Wednesday, 11 / 2 / 2022