2022 10 Drainage Statement Signed

15 Hydrograph Report Hydraflow Hydrographs by Intelisolve v9.1 Monday, Oct 24, 2022 Hyd. No. 6 Proposed Site (Pervious) Hydrograph type = SCS Runoff Peak discharge = 0.882 cfs Storm frequency = 10 yrs Time to peak = 724 min Time interval = 1 min Hyd. volume = 2,590 cuft Drainage area = 0.280 ac Curve number = 76 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = USER Time of conc. (Tc) = 2.00 min Total precip. = 5.22 in Distribution = Custom Storm duration = NOAA Atlas 14 Type-D.cds Shape factor = 484 Proposed Site (Pervious) Q (cfs) Q (cfs) Hyd. No. 6 -- 10 Year 1.00 1.00 0.90 0.90 0.80 0.80 0.70 0.70 0.60 0.60 0.50 0.50 0.40 0.40 0.30 0.30 0.20

0.40 0.30 0.30 0.20 0.20 0.10 0.10 0.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) Hyd No. 6