2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" 2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 8/5/2022 Prepared by Dynamic Engineering Printed 8/5/2022 CAD 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC Page 114 HydroCAD® 10.20-2d s/n 08640 © 2024 HydroCAD Software Solutions LLC Page 112 ‘Summary for Subcatchment 3S: Basin A - Perv. Hydrograph for Subcatchment 3S: Basin A - Perv. Runoff = 3.04cfs@ 12.17 hrs, Volume= 0.259 af, Depth= 5.52" Time Precip. Excess Runoff | Time Precip. Excoss Runoff Routed to Pond 3P : Basin A (hours) (inches) (inches ours) (inches) (inches) (fs 0.00 0.00 0.00 0.00 | 5200 8.66 5.52 0.00 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs aa eo peo 6.00 ||| $3.00 8.68 5.52 ea) NOAA 24-hr D. 100-Year Rainfall=8.66" 2.00 0.21 0.00 0.00 54,00 8.66 5.52 0.00 3.00 0.33 0.00 0.00 55.00 8.66 5.52 0.00 A 5 CN De 4.00 0.45, 0.00 0.00 56.00 8.66 5.52 0.00 rea (sf) escription 5.00 0.59 0.00, 0.00 | 57.00 868 5.52 0.00 24,500 74 >75% Grass cover, Good, HSG C 6.00 0.74 0.00 0.00 | 5800 886 552 0.00 24,500 00.00% Pervious Area 7.00 0.91 0.04 0.01 | 5900 868 552 0.00 8001.12 0.05 0.02 | 60.00 866 5.52 0.00 Te Len it it ‘pti 900 137 O11 0.04 | 61,00 866 552 0.00 (oa tees men lees ae 1000 172 0.23 0.08 | 6200 866 552 0.00 10.0 11.00 2.25 0.47, 0.19 63.00 8.66 5,52 0,00 2 Direct Entry, Direct 1200 415 (4.71 1.36 | 64.00 866 5.52 0.00 1300 641 3.53 as | 6500 866 5.52 0.00 Subcatchment 3S: Basin A - Perv. 14,00 6.94 3.99 0.21 66.00 8.66 5.52 0.00 15.00 7.29 4.23 0.15 67.00 8.66 5.52 0,00 Hydrograph 16.00 7.54 4.51 012 | 6800 866 5.52 0.00 47.00 775 4.70 0.10 | 69.00 868 5.52 0.00 Ge} ye00 792 489 0.08 | 70.00 866 552 0.00 19.00 8.07 4s 0.07 71.00 8.66 5.52 0.00 x NOAA 24-hr D 2000 821 5.14 007 | 7200 866 552 0.00 anfall=8. 66" 21.00 833 © 5.23 0.08 100-Year Rainfall=8.66' 2200 «845 «5.33 0.08 = 23.00 8.56 5.43 0.05 Runoff Area=24,500 sf Piece A 4 Runoff Volume=0-259 af 3500 888 582 0.00 z Seon : : 0.00 4 Runoff Depth=5.52' 27.00 866 5.52 0.00 - 2800 866 5.52 0.00 e Te=10.0 min 2900 868 5.52 0.00 CN=74 30.00 866 5.52 0.00 + 31.00 8.66 5.52 0.00 3200 866 552 0.00 33.00 8.66 5.52 0.00 34.00 8.66 5.52 0.00 35.00 8.66 5.52 0.00 36.00 8.66 5.52 0.00 ‘ 3700 8.66 5.52, 0.00 STN SETS Tews 1 10H Dee a0 28°90 92 96 36 30 00 42 0-40

1.00 8.66 5.52 0.00 3200 866 552 0.00 33.00 8.66 5.52 0.00 34.00 8.66 5.52 0.00 35.00 8.66 5.52 0.00 36.00 8.66 5.52 0.00 ‘ 3700 8.66 5.52, 0.00 STN SETS Tews 1 10H Dee a0 28°90 92 96 36 30 00 42 0-40 4090 BT 54 06 9800 82 E560 5270 72 3800 866 5.52 0.00 39.00 866 5.52 0.00 40.00 8.66 5.52 0.00 41.00 8.66 5.52 0.00 42.00 8.66 5.52 0.00 43.00 8.66 5.52 0.00 44.00 8.66 5.52 0.00 45.00 8.66 5.52 0.00 46.00 8.66 5.52 0.00 47.00 8.66 5.52 0.00 48.00 8.66 5.52 0.00 49.00 8.66 5.52 0.00 50.00 8.66 5.52 0.00 51.00 8.66 5.52, 0.00