2022 08 Drainage Report

2022-07-21 Existing Hydrology NOAA 24-hrD 10-Year Rainfall=5.22" 2022-07-21 Existing Hydrology NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 9/5/2022 Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC. Page 17 ifoCAD@ 10.20.24 s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 18 Summary for Subcatchment 3S: Mt. Pleasant Ave. - Perv. Hydrograph for Subcatchment 3S: Mt. Pleasant Ave. - Perv. Runoff = —5.39cfs@ 12.37 hrs, Volume= 0.669 af, Depth= 2.20" Rouled to Link 2L : Mt. Pleasant Ave. Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs ao ee teed fect || cre aa NOR 2st D/10svea alntall-5:22 3.00 0.20 © 0.00 0.00 | 3500 522 220 0.00 H 4.00 0.27 0.00 0.00 56.00 6.22 2.20 0.00 Area (sf)_CN__Description 5.00 0.36 0.00 ooo | 57.00 522 2.20 0.90 155,762 70 Woods, Good, HSG C 6.00 045 0.00 0.00 | 5800 522 220 0.00 2,359 77 Woods, Good, HSG D 7.00 0.85 0.00 0.00 | 59.00 522 220 0.00 749 74 _>75% Grass cover, Good, HSG C. 800 0.68 0.00 0.00 | 60.00 522 220 0.00 9.00 0.83 0.00 000 | 6100 522 220 0.00 Assiery, 170 TWelgiied|fwateae 40.00 1.03 0.01 0.03 | 6200 522 220 0.00 158,870 4100.00% Pervious Area feos tae abs facil eaoo son 220 ae e set 12.00 2.50 0.46 141 64.00 5.22 2.20 0.00 Te Length Slope Velocity Capacity Description 13.00 386 1.24 176 | 6500 522 2.20 0.00 (min) (feet) _(ft/ft)_(fl/sec) (cfs) 14.00 4.19 1.45 0.72 | 66.00 5.22 2.20 0.00 24.2 100 0.0135 0.07 Sheet Flow, Sheet Flow (AB) 1600 439 © 1.60 050 | 6700 522 220 0.00 Woods: Light underbrush n= 0.400 P2= 3.44" 1600 454 1:70 039 | 6800 522 220 0.00 06 145 0.0672 417 ‘Shallow Concentrated Flow, SCF - Unpaved (BC) 17.00 4.67 1.80 0.33 69.00 5.22 2.20 0.00 Unpaved Kv= 16.1 fps 1800 4.77 1.87 027 | 70.00 522 2.20 0.00 248 245 Total 19.00 4.86 1.94 0.24 71.00 5.22 2.20 0.00 ~ 20.00 4.95 2.00 0.22 72.00 5.22 2.20 0.00 21.00 502 21 021 Subcatchment 3S: Mt. Pleasant Ave. - Perv. 22.00 5.09 0.19 23.00 5.16 0.18 a 24.00 522 016 ° 25.00 5.22 0.00 [=] 26.00 5.22 0.00 27.00 5.22 0,00 J NOAA 24-hr D. 200 522 2.00 10-Year Rainfall=5.22' aaa eg ‘ Runoff-Area=158,870-sf 3100 9.22 990 Runoff Volume=0.669 af 33.00 5.22 0.00 r = 0 34.00 5.22 0.00 g E Runoff Depth=2.20 Soo Boe O00 i =245" 36.00 5.22 0.00 @ Flow Length=245' om eae oon i Tc=24.8 min 38.00 5.22 0.00 _ 39.00 5.22 0.00 CN=70

noff Volume=0.669 af 33.00 5.22 0.00 r = 0 34.00 5.22 0.00 g E Runoff Depth=2.20 Soo Boe O00 i =245" 36.00 5.22 0.00 @ Flow Length=245' om eae oon i Tc=24.8 min 38.00 5.22 0.00 _ 39.00 5.22 0.00 CN=70 40.00 5.22 0.00 41,00 5.22 0.00 1 42.00 5.22 0.00 43.00 5.22 0.00 44.00 5.22 0.00 ot 45.00 5,22 0.00 0 2 4 B B 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38-40 42 44 46 48 50 52 St 56 58.60 G2 64 66 68.70 72 46.00 5.22 0.00 Time (nous) 47.00 5:22 0.00 4800 5.22 0.00 49.00 5.22 0.00 50.00 5.22 0.00 51.00 5.22 0.00