2022 08 Drainage Report

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

2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 1 Summary for Subcatchment 4S: Ba: B-Imp. Runoff = 0.76 cfs @_ 12.17 hrs, Volume= 0.075 af, Dept Routed to Pond 4P : Basin B Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 100-Year Rainfall=8.66" Area (sf)__CN__ Description 4,648 98 Unconnected pavement, HSG C. 4,648 10.00% Impervious Area 4,648 100.00% Unconnected Te Length Slope Velocity Capacity Description (min) (feet) _(ft/ft) _(ftisec)_(cfs) 10.0 Direct Entry, Direct Subcatchment 4S: Basin B - Imp. Hydrograph NOAA 24-hr D ina 100-Year Rainfall=8.66" Runoff Area=4,648 sf__ Runoff Volume=0.075 af- Runoff Depth=8.42"_ Tc=10.0 min “CN=98 OR A GB WO TE 1 TO 1820 22 24 26 28 80-32 24 96 38 40.42 44 46 48 50 $2 54 $6 58 60 G2 64 68.68 7072 Time (hours) 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-2d_s/n 08640 _© 2021 HydroCAD Software Solutions LLC Time Precip. Excess hours) (inches) (inches) ) 0.00 NOAA 24-hr D 100-Year Rainfall=8.66" Printed 8/5/2022 Hydrograph for Subcatchment 4S: Basin B - Imp. Runoff (cfs) 0.00 0.00 0.01 Time Precip. Excess Runoff

2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d_s/n 08840 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Basin B - Perv. Runoff = 3.92 cfs @_12.17 hrs, Volume= 0.333 af, Depth= 5.52" Routed to Pond 4P : Basin B Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 100-Year Rainfall=8.66" Area (sf) CN Description, 31,571__74__>75% Grass cover, Good, HSG C. 31,571 100.00% Pervious Area Te Length Slope Velocity Capacity Description (min) (feet) _(ftft)_(f/sec) (cfs) 10.0 Direct Entry, Direct Subcatchment 5S: Basin B - Perv. Hydrograph NOAA 24-hr D 100-Year Rainfall=8.66" a Runoff Area=31,571 sf Runoff Volume=0.333 af Runoff Depth=5.52" * Tc=10.0 min CN=74 Flow (cfs) 0-2-4 6 8 WIZ Ia 16 18M 22 24 25 28 90 92 34 95 38.40 42 44 AG 48 80 52 O4 98 58.60 62 64 66 68 70 72 Time (hours) 2022-07-28 Proposed Hydrology NOAA 24-hr D100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 9/5/2022 HydroCAD@ 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC Page 116 Time Precip. (hours) (inches) 0.00 0.00 1.00 0.10 200 0.21 3.00 0.33 4.00 0.45 5.00 0.69 6.00 0.74 7.00 0.91 800 1.12 900 1.37 10.00 1.72 14.00 2.25 1200 4.15 43.00 6.41 14.00 6.94 15.00 7.29 16.00 7.54 47.00 7.75 18.00 7.92 19.00 8.07 20.00 3.21 21.00 8.33 22.00 8.45 23.00 8.568 24.00 8.66 25.00 8.66 26.00 8.66 27.00 8.66 28.00 8.66 29.00 8.66 30.00 8.66 31.00 8.66 32.00 8.66 33.00 8.66 34.00 8.68 35.00 8.66 36.00 8.66 37.00 8.66 38.00 8.66 39.00 8.66 40.00 8.66 41.00 8.66 4200 8.66 43.00 8.66 44.00 8.66 45,00 8.66 46.00 8.66 47.00 8.66 48.00 8.66 49.00 8.66 50.00 8.66 51.00 8.66 Hydrograph for Subcatchment 5S: Basin B - Perv. Time Precip. Excess Runoff

2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 9/5/2022 HydroCAD® 10.20-2¢_ sin 08640 © 2021 HydroCAD Software Solutions LLC Page 117 Summary for Subcatchment 7S: Ba: C-Imp. Runoff = 0.75 cfs @_ 12.17 hrs, Volume= 0.075 af, Depth= 8.42" Routed to Pond 5P : Basin C Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 100-Year Rainfall=8.66" Area (sf) CN Description 4,635 ___98__ Unconnected pavement, HSG C 4,635 100.00% Impervious Area 4,635 40.00% Unconnected Te Length Slope Velocity Capacity Description (min) (feet) (fit) _(fuisec) ___(cfs) 10.0 Direct Entry, Direct Subcatchment 7S: Basin C - Imp. tydrograph ow (Brea) a NOAA 24-hr D ie 100-Year Rainfall=8.66" 06: -Runoff Area=4,635 sf iat Runoff Volume=0.075 af $ as Runoff Depth=8.42" i oa ~- Te=10.0 min as] 094 CN=98 of O24 OO TO 1214 16 100 22 24 28 28 30 32 34 96 38 40 42 44 48 48 50 £2 54 86 $8.60 62 GE 60.65 7072 “Time (hours) 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering 40.20-24 sin 08640 © 2021 HydroCAD Software Solutions LLC Time Precip. Excess hours) (inches: (inches) 0.00 0.01 0,08 0.17 0.28 NOAA 24-hr D 100-Year Rainfall=8.66" Printed 8/5/2022 4 Hydrograph for Subcatchment 7S: Basin C - Imp. Runoff 1 Precip. Excess Runoff (cis

NOAA 24-hr D 100-Year Rainfall=8.66" Printed 9/5/2022 Page 119 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 8S: Basin C - Perv. Runoff = 3.87 cfs @_12.17 hrs, Volume= Routed to Pond 5P : Basin C 0.329 af, Depih= 5.52" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 100-Year Rainfali=8. Area (sf)__CN Description 31,149 74__>75% Grass cover, Good, HSG C 31,149 400.00% Pervious Area Te Length Slope Velocity Capacity Description (min) (feet) _(fvft)_(fusec)__(ofs) 10.0 Direct Entry, Direct Subcatchment 8S: Basin C - Perv. Hydrograph NOAA 24-hr D 100-Year Rainfall=8.66" af Runoff Area=31,149 sf Runoff Volume=0.329 af Runoff Depth=5.52" . Tc=10.0 min Flow (cs) CN=74 246 8 Wiz 14 V6 1020 22 24 26 28 30 32 34 36 38 40 42 44 46 48 60 52 54 56 56 60 62 G4 60 68 70 72 “Time (hours) 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC Time Precip. Excess NOAA 24-hr D 100-Year Rainfall=8.66" Printed 8/5/2022 Hydrograph for Subcatchment 8S: Basin C - Perv. Runoff | Time Precip. Excess Runoff

2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-24_ sin 08640 © 2021 HydroCAD Software Solutions LLC NOAA 24-hr D 100-Year Rainfall=8.66" Printed 8/5/2022 424 Summary for Subcatchment 9S: Mt. Pleasant Ave Undetained - Imp. Runoff = 0.28 cfs @ 12.17 hrs, Volume= Routed to Link 3L : Mt. Pleasant Ave - Undetained 0.027 af, Depth= 8.42" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hrD 100-Year Rainfall=8.66" Area (sf)__CN__Desoription 1,085 98 Unconnected pavement, HSG C 621__98__ Unconnected pavement, HSG D 7,708 98 Weighted Average 1,706 100.00% Impervious Area 1,708 4100.00% Unconnected Te Length Slope Velocity Capacity Description (min) (feet) _(ftft)_(fsec) (cfs). 10.0 Direct Entry, Direct Subcatchment 9S: Mt. Pleasant Ave Undetained - Imp. Hydrograph os4 | NOAA 24-hr D o2| 100-Year Rainfall=8.66" my Runoff Area=1,706 sf awl Runoff Volume=0.027 af re Runoff Depth=8.42" Boxe] Tc=10.0 min bo CN=98 (0-2 4G 8 WO IRI 16 1020 22 24 20 28 30 32 34 95 38 40.42 44 AO 48 50 52 54 56 $8.60 62 Gt 05.63 7072 ‘Time (hours) 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering NOAA 24-hr D 100-Year Rainfall=8.66" Printed 8/5/2022 HydroCAD® 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC Page 12: Hydrograph for Subcatchment 9S: Mt. Pleasant Ave Undetained - Imp. Time Precip. Excess Runoff (hours) (inches) (inches) 0.00 0.00 0.00 4.00 0.10 0.00 200 0.21 0.00 3.00 0.33 0.00 4.00 0.45 0.00 5.00 0.59 0.01 6.00 0.74 0.04 7.00 0.91 0.01 800 4.42 0.01 900 1.37 0.01 10.00 1.72 0.02 14.00 2.25 0.03 1200 4.15 0.14 13.00 6.4% 0.04 14.00 6.94 0.02 4500 7.29 0.01 16.00 7.54 0.01 47.00 7.75 0.01 18.00 7.92 0.01 49.00 8.07 0.01 20.00 8.21 0.01 21.00 8.33 0.00 2200 8.45 0.00 23.00 8.56 0.00 24.00 8.668 0.00 25.00 8.66 0.00 26.00 8.66 0.00 27.00 8.66 0.00 28.00 8.66 0.00 29.00 8.66 0.00 30.00 8.66 0.00 31.00 8.66 0.00 32.00 8.668 0.00 33.00 8.66 0.00 34.00 8.66 0.00 35.00 8.66 0.00 36.00 8.66 0.00 37.00 8.66 0.00 38.00 8.66 0.00 39.00 8.66 0.00 40.00 8.66 0.00 41.00 8.66 0.00 42.00 8.66 0.00 43,00 8.66 0.00 44.00 8.66 0.00 45.00 8.66 0.00 46.00 8.66 0.00 47.00 8.66 0.00 48.00 8.66 0.00 49.00 8.66 0.00 50.00 8.66 0.00 51.00 8.68 0.00 Time Precip. Excess Runoff (inches) (inches)

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 HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 123 Summary for Subcatchment 10S: Mt. Pleasant Ave Undetained - Perv. Runoff == 5.01 cfs @ 12.17 hrs, Volume= 0.426 af, Depth= 5.52" Time Precip. Excess Routed to Link 3L : Mt, Pleasant Ave - Undetained (hours) (inches) (inches) 0.00 0.00 0.00 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs 100 0.10 0.00 NOAA 24-hr D 100-Year Rainfall=8.66" Area (sf) __CN__Deseription. $00 088 (0.00 38,200 74 575% Grass cover, Good, HSG C 600 074 0.00 2.419 80 _>75% Grass cover, Good, HSG D 700 0.91 0.01 ‘40,319 74 Weighted Average 8.00 1.12 0.05 40,319 100.00% Pervious Area on) tae ga Tc Length Slope Vel Capacity Description 415 71 (rin) (feet) (W)_ (fuses) (cts) too at 38 10.0 Direct Entry, Direct 14.00 6.94 3,99 15.00 7.29 4.29 a i - 16.00 7.54 451 Subcatchment 10S: Mt. Pleasant Ave Undetained - Perv. ee Hydrograph 18.00 792 485 19.00 8.07 4.99 (Eka 20.00 821 5.11 21.00 8.33 5.23 5 NOAA 24-hr D 22.00 845 5.33 ” 2300 856 5.43 100-Year Rainfall=8.66' 24.00 8.66 5.52 al = 25.00 866 5.52 Runoff Area=40,319 sf 28.00 «8685.52 Runoff Volume=0.426 af 27.00 868 8.82 z= = 28.00 8.66 5.52 came Runoff Depth=5.52' 29.00 8.66 5.52 z . 30.00 8.66 5.52 2 Te=10.0 min 3100 8.66 5.52 =" 32,00 8.66 5.52 CN=74 33.00 8.66 5.52 34.00 8.66 5.52 35,00 8.66 5.52 36.00 8.66 5.52 37.00 8.66 5.52 38.00 8.66 5.52 39.00 8.66 §.52 O12 46 Sw in Wo Whad ta 28 2090 0294 38 2840 424 40480 S24 80 BBO 62 6608 087072 hain Maes 50!

2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCy 410.20-2d sin 08640 © 2021 Summary for Subcatchment 11S: Basin D - Imp. Runoff = 0.39 cfs @_ 12.17 hrs, Volume= 0.039 af, Depth= 8.42" Routed to Pond 6P : Basin D Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 100-Year Rainfall=8.66" Area (sf) CN Description 2,400 98 _Unconnected pavement, HSG C_ 2,400 10.00% Impervious Area 2,400 10.00% Unconnected Te Length Slope Velocity Capacity Description (min) _(feet)__(ft)_(f/sec) (cfs) 10.0 Direct Entry, Direct Subcatchment 11S: Basin D - Imp. Hydrograph NOAA 24-hr D-. 100-Year Rainfall=8.66" _Runoff Area=2,400 sf Runoff Volume=0.039 af Runoff Depth=8.42"— Tc=10.0 min 010] CN=98 O26 OB TO 1 14 TO IOI 22 WN 26 28 20-32 34 38 3B A042 44 46 48 50 52 54 96 58 60 G2 66 66.68 70 72 Time (hours) 2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD®@ 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC Page 126 inches) Hydrograph for Subcatchment 11S: Basin D - Imp. Runoff

2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD@ 10.20-24 sin 08640 © 2021 HytiroCAD Software Solutions LLC Page 127 Summary for Subcatchment 12S: Basin D - Perv. Runoff = 1.98 cfs @_ 12.17 hrs, Volume= 0.169 af, Depth= 5.52” Routed to Pond 6P : Basin D Runoff by SCS TR-20 method, UI NOAA 24-hr D 100-Year Rainfall: 'S, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs 3.66" Area (sf)__CN__Description 15,983 74 __>75% Grass cover, Good, HSG C 15,983 100.00% Pervious Area Te Length Slope Velocity Capacity Description (min) __(feet)__(f/ft)_(f’sec) (cfs) 10.0 Direct Entry, Direct Subcatchment 12S: Basin D - Perv. Hydrograph 4 NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=15,983 sf Runoff Volume=0.169 af Runoff Depth=5.52" Tc=10.0 min CN=74 Flow (ets) DAE STO IE IA TO TOH0 22 282080 BEM BP 940 24k 6 8 80 2 80 9 0 62 O46 087 72 2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC. Page 128 Hydrograph for Subcatchment 12S: Basin D - Perv. Time Precip. Excess Runoff | Time Precip. Excess Runoff (hours) (inches) (inches) (hours) (inches) (inches) (fs) 0.00 0.00 0.00 0.00 | 52.00 866 5.52 0.00 4.00 0.10 0.00 0.00 | 5300 866 5.52 0,00 200 0.21 0.00 0.00 | 5400 866 5.52 0.00 3.00 0.33 0.00 0.00 | 55.00 866 5.52 0.00 4.00 045 0.00 0.00 | 56.00 866 5.52 0.00 5.00 0.59 (0.00 0.00 | 57.00 866 5.52 0.00 6.00 0.74 0,00 0.00 | 5800 865 5.52 0.00 700 0.91 = 0.01 0.01 | 5900 866 552 0.00 800 1.12 0.05 0.02 | 60.00 866 5.52 0.00 900 1.37) 0.11 0.03 | 61.00 866 552 0.00 40.00 1.72 0.23 0.08 | 6200 866 5.52 0.00 11.00 225 0.47 0.12 | 63.00 866 5.52 0.00 1200 415 1.71 oss | 6400 866 5.52 0.00 1300 641 353 028 | 65.00 866 5.52 0.00 14.00 694 3.99 0.14 | 66.00 866 5.52 0.00 15.00 7.29 4.29 0.10 | 67.00 866 5.52 0.00 1600 7.54 4.51 0.08 | 6800 866 5.52 0.00 17.00 775 4.70 ao7 | 6900 866 5.52 0.00 1800 7.92 4.85 0.05 | 70.00 866 5.52 0.00 19.00 8.07 4.99 0.05 | 74.00 866 5.52 0.00 20.00 821 5.11 0.04 | 7200 866 5.52 0.00 21.00 8.33 5.23 0.04 2200 845 5.33 0.04 23.00 856 5.43 0.04 24.00 866 5.52 0.03 25.00 866 5.52 0.00 26.00 866 © 5.52 0.00 27.00 8.66 5.52 0.00 28.00 866 5.52 0.00 29.00 866 5.52 0.00 30.00 866 5.52 0.00 31.00 865 5.52 0.00 3200 865 5.52

.04 23.00 856 5.43 0.04 24.00 866 5.52 0.03 25.00 866 5.52 0.00 26.00 866 © 5.52 0.00 27.00 8.66 5.52 0.00 28.00 866 5.52 0.00 29.00 866 5.52 0.00 30.00 866 5.52 0.00 31.00 865 5.52 0.00 3200 865 5.52 0.00 33.00 866 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 37.00 8.66 5.52 0.00 38.00 866 5.52 0.00 39.00 8.66 5.52 0.00 40.00 866 5.52 0.00 41.00 866 5.52 0.00 4200 866 5.52 0.00 43.00 866 5.52 0,00 44.00 866 5.52 0.00 45.00 866 5.52 0.00 46.00 866 5.52 0.00 47.00 866 5.52 0.00 48,00 866 5.52 0.00 49.00 866 5.62 0.00 50.00 8.66 5.52 0.00 51.00 868 5.52 0.00