2022 08 Drainage Report

2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering sin 08640 © 2021 HydroCAD Software Solutions LLC HydroCAD® 10.20. Elevation Primary (feet) (cfs) Stage-Discharge for Pond 5P: Basin C Elevation Primary (feet) ___(cfs) 619,54 0.00 619.56 0.00 619.58 0,00 619.60 0.00 619.62 0.00 619.64 0.00 619.66 0.00 619.68 0.00 619,70 0.00 619.72 0.00 619.74 0.00 619.76 0.00 619.78 0.00 619.80 0.00 619.82 0.00 619,84 0.00 619.86 0,00 619.88 0.00 619.90 0.00 619.92 0.00 619.94 0.00 619.96 0.00 619,98 0.00 620.00 0,00 620,02 0.00 620.04 0.00 620.06 0.00 620.08 0,00 620.10 0.00 620.12 0.00 620.14 0.00 620.16 0.00 620,18 0.00 620.20 0,00 620.22 0.00 620,24 0,00 620.26 0.00 620.28 0.00 620.30 0.00 620.32 0.00 620.34 0.00 620.36 0.00 620.38 0.00 620.40 0.00 620.42 0.00 620.44 0.00 620.46 0.00 620.48 0.00 620.50 0.00 620,52 0.02 620.54 0.05 620.56 0.10 NOAA 24-hr D 100-Year Rainfall=8.66" Elevation Primary feet) (cfs) 620.58 0.15, 620.60 0.22 620.62 0.28 620.64 0.36 620.66 0.44 620.68 0.52 620.70 061 620.72 071 620.74 0.81 620.76 0.86 620.78 0.89 620.80 0.92 620.82 0.95 620.84 0.98 620.86 4.01 620,88 1.04 620.90 1.08 620.92 1.09 620.94 111 620.96 144 620.98 116 621.00 119 621.02 421 621.04 1.24 621.06 1.26 621.08 1.28 621.10 1.30 621.12 1.32 621.14 1.34 621.16 1.37 621.18 1.39 621.20 1.41 621.22 1.43 621.24 1.45 621.26 147 621.28 4.48 621,30 1.50 621.32 4.52 621.34 154 621.36 1.56 621.38 1.58 621.40 1.59 621.42 1.61 621.44 1.63 621.46 1.65 621.48 1.68 621.50 1.68 Printed 8/5/2022 P: 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 146 Elevation Surface ‘Stage-Area-Storage for Pond 5P: Basin C

2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Raintall=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 Hy \D Software Solutions LLC 7 Hy 40.20-24_sin 08640 © 2021 HydroCAD Software Solutions LLC Et ‘Summary for Pond 6P: Basin D Pond 6P: Basin D Hydrograph Inflow Area= 0.422. ac, 13.06% Impervious, Inflow Depth = 5.90" for 100-Year event Inflow = 2.37 cfs@ 12.17 hrs, Volume= 0.207 af Outflow = — 0.82cfs@ 12.43 hrs, Volume= 0.125 af, Atten= 65%, Lag= 15.7 min Primary = 0.82cfs@ 12.43 hrs, Volume= 0.125 af Inflow Area=0.422 ac Routed fo Link 21: Mt, Pieasant Ave. : Peak Elev=616.75 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs = Peak Elev= 616.75' @ 12.43 hrs SurfArea= 2,990 sf Storage= 4,291 cf Storage=4,291 cf Plug-Flow detention time= 235.1 min calculated for 0.126 af (60% of Center-of-Mass det. time= 118.5 min ( 928.4 - 809.9 ) Flow (cfs) Volume ____Invert__A\ 7 615.00 8,561 of Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 615.00 1,951 0 0 616.00 2.519 2,235 2,235 617.00 3,150 2,835 5,070 618.00 3,833 3.492 8.561 O24 6 6 Mo IZ 1020221 2628 02 303-40 2 46404 202 4 890 OD G2 46008 7072 Device Routing Invert_Outlet Devices #1 Primary 616.50° 8.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Pond 6P: Basin D Stage-Dischargo rimary OutFlow Max=0.83 cfs @ 12.43 hrs HW=616.75' (Free Discharge) 4=Orifice/Grate (Orifice Controls 0.83 cfs @ 2.39 fps) [can | Elevation (feet) cr a 7 Discharge (cfs)

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 4/5/2022 Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d_s/n 08640 © 2021 tic 9 Hy 10.20-2d sin 08640 © 2021 Hy Pi Pond 6P: Basin D Hydrograph for Pond 6P: Basin D Stage-Area-Storage Time inflow Storage Elevation Primary LvWetted Arca (sa) (9 200 400 690. 800 1,000 1,200 1400 1,600 1,800 2,000 2.200 2.400 2.600 2.0003,000 3,200 3,400,600 3.809 Etovation (fet) ork ‘© 8a 1,000 7,600 2.000 2,800 3,000 300 4.000 8 800 5,00 5,200 6.000 6.800 7.000 7.500 6.000 8.800 ‘Storage (evble-oat)

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 151 Stage-Discharge for Pond 6P: Basin D Elevation Primary | Elevation Primary | Elevation Primary —(ieet)___(cfs) | ___{feet)___(cfs) | ___(feet)__(cts) 615.00 0.00 616.04 0.00 617.08 1.28 615.02 0.00 616.06 0.00 617.10 4.30 615.04 0.00 616.08 0.00 617.12 1.32 615.06 9.00 616.10 0.00 617.14 1.34 615.08 0.00 616.12 0.00 617.16 1.37 615.10 0.00 616.14 0.00 617.18 1.39 615.12 0.00 616.16 0.00 617.20 1.41 615.14 0.00 616.18 0.00 617.22 143 615.16 0.00 616.20 0,00 617.24 145 615.18 0.00 616.22 0.00 617.26 447 615,20 0.00 616.24 0.00 617.28 1.48 615.22 0,00 616.26 0.00 617.30 1.50 615.24 0.00 616.28 0.00 617.32 152 615,26 0.00 616.30 0.00 617.34 1.54 615.28 0,00 616.32 0.00 617.36 1.56 615.30 0.00 616.34 0.00 617,38 158 615.32 0.00 616.36 0.00 617.40 1.59 615.34 0.00 616.38 0.00 617.42 1.61 615,36 0.00 616.40 0.00 617.44 1.63 615.38 0.00 616.42 0.00 617.46 1.65 615.40 0.00 616.44 0.00 617.48 166 615.42 0.00 616.46 0.00 617.50 1.68 615.44 0.00 616.48 90.00 617.52 1:70 615.46 0.00 616.50 0.00 617.54 171 615.48 0,00 616.52 0.02 617.56 173 615.50 0.00 616.54 0.05, 617.58 4.75 615.52 0.00 616.56 0.10 617.60 1.76 615.54 0.00 616.58 015 617.62 1.78 615.56 0.00 616.60 0.22 617.64 1.79 615.58 0.00 616.62 0.28 617.66 1.81 615.60 0.00 616.64 0.36 617.68 1.83 615.62 0.00 616.68 0.44, 617.70 1.84 615.64 9.00 616.68 0.82 617,72 1.86 615.66 0.00 616.70 0.61 617.74 1.87 615.68 0.00 616.72 o7t 617.76 1.89 615.70 0.00 616.74 ost 617.78 1.90 615.72 0.00 616.76 0.86 617.80 1.92 615.74 0.00 616.78 0.89 617.82 1.93 615.76 0.00 616.80 0.92 617.84 1.95 615.78 0,00 616.82 0.95 617.86 1.96 615.80 0.00 616.84 0.98 617.88 197 615.82 0.00 616.86 1.01 617.90 1.98 615.84 0.00 616.88 1.04 617.92 2.00 615.86 0.00 616.90 1.08 617.94 2.02 615.88 0.00 616.92 1.09 617.96 2.03 615.90 0.00 616.94 111 617.98 2.04 615.92 0.00 616.96 114 618.00 2.06 615.94 0.00 616.98 1.16 615.96 0.00 617.00 1.19 615.98 0.00 617.02 1.21 616.00 0.00 617.04 1.24 616.02 0.00 617.06 1.26 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering “AD@ 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC Hy NOAA 24-hr D 100-Year Rainfall=8.66" Printed 8/5/2022 ‘Stage-Area-Storage for Pond 6P: Basin D Elevation Surface

namic Engineering “AD@ 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC Hy NOAA 24-hr D 100-Year Rainfall=8.66" Printed 8/5/2022 ‘Stage-Area-Storage for Pond 6P: Basin D Elevation Surface Storage (feet) (sa-ft) __(cubic-feet) 615.00 0 615.05, 98 615.10 198 615.15, 299 615.20 402 615.25, 506 615.30 611 615.35 718 615.40 826 618.00 3,833 8,561 615.45 935 615.50 1,047 615.55, 1,159 615.60, 1,273 615.65, 4,388 615.70 1,505 615.75 1,623, 615.80 1,743 615.85, 1,864 615.90 1,986 615.95, 2.110 616.00 2,235 616.05 2,362 616.10 2,490 616.15, 2,620 616.20 2,751 616.25, 2,884 616.30 3,019 616.35, 3,155 616.40 3,293 616.45, 3,432 616.50 3,573 616.55, 3,716 616.60 3,860 616.65 4,006 616.70 4.153 616.75 4,302 616.80 4,452 616.85, 4,604 616.90 4,758 616.95, 4913 617.00 5,070 617.05, 5,228 617.10 5,388 617.15, 5,550 617.20 5713 617.25 5,878 617.30 6,045 617.35, 6.214 617.40, 6,384 617.45 6,556 617.50 6,730 617.55, 6,905

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 4 HydroCAD® 10.20-2d_ sin 08640 © 2021 HydroCAD Software Solutions LLC Page 154 Summary for Link 2L: Mt. Pleasant Ave. Hydrograph for Link 2L: Mt. Pleasant Ave. Inflow Area = 3.709 ac, 11.17% Impervious, Inflow Depth= 4.49" for 100-Year event Time Inflow Elevation — Primary Time Inflow Elevation — Primary Inflow = 7.51 cfs @ 12.21 hrs, Volume= 1.387 af te Leis) eat ay haus) (ets) eat) st Primary 751 cfs@ 12.21 hrs, Volume 1.387 af, Atten= 0%, Lag= 0.0 min a en eee oro | ee Td _ - = i= 2.00 0.00 0,00 0.00 54.00 0.00 0.00 0.00 Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs a0 ed aon | tesco! ca gael can 4,00 0.00 0.00 0.00 56.00 0.00 0.00 0.00 Link 2L: Mt. Pleasant Ave. 5.00 0.01 0.00 0.01 57.00 0.00 0.00 0.00 Hydrograph 6.00 0.01 0.00 0.01 | 58.00 0.00 0.00 0.00 7.00 0.02 0.00 0.02 | 59.00 0.00 0.00 0.00 8.00 0.05 0.00 0.05 | 60.00 0.00 0.00 0.00 : [fe] 9.00 0.08 = 0.00 0.08 | 67.00 0,00 0.00 0.00 ‘| =" 10,00 O15 0.00 0.15 62.00 0.00 0.00 0.00 Inflow Area=3.709 ac 11.00 034 © 0.00 034 | 63.00 0.00 0.00 0.00 D 12.00 237 0.00 237 | 64.00 0.00 0.00 0.00 13,00 413° 0.00 443 | 65.00 0.00 © 0.00 0.00 rs 14.00 2.24 0.00 2.24 66.00 0.00 0,00 0.00 15.00 1,36 0.00 1.36 67.00 0.00 0.00 0.00 16.00 0.85 0.00 0.85 68.00 0.00 0.00 0.00 z * 17.00 0.70 0,00 0.70 69.00 0.00 0.00 0.00 a 18.00 0.57 0.00 0.57 79.00 0.00 0.00 0.00 3 44 19.00 0.50 0.00 0.50 71.00 0,00 0,00 0.00 . 20.00 0.47 0.00 0.47 72.00 0.00 0,00 0.00 aj 24.00 043 0.00 0.43 22.00 040 0.00 0.40 23.00 0.37 0.00 0.37 (24.00 0.34 0.00 0.34 25.00 0.06 0.00 0.06 26.00 0.02 0.00 0.02 27.00 0,01 0.00 0.01 28,00 0.00 0.00 0.00 02-46 8 101E W 101020 2298 20 28 30 32 9698 38.40 A2 44 46 45 60 S2 54 88 88 60 62 64 OF 6870 72 29.00 00 © 9.00 0.00 ‘Time (hours) 30,00 0.00 0.00 0,00 31,00 0.00 0.00 0.00 32.00 0.00 0.00 0.00 33.00 0,00 0.00 0.00 34,00 0.00 0.00 0.00 35.00 0.00 © 0.00 0.00 36.00 0.00 0.00 0.00 37.00 0,00 0.00 0.00 38.00 0.00 0.00 0.00 39.00 0.00 0.00 0.00 40.00 0,00 0.00 0.00 41.00 0.00 0.00 0.00 42.00 0.00 0.00 0.00 43,00 0.00 0.00 0,00 44.00 0.00 0.00 0.00 45.00 0.00 0.00 0.00 46.00 0.00 0.00 0.00 47.00 0.00 0.00 0.00 48.00

0.00 39.00 0.00 0.00 0.00 40.00 0,00 0.00 0.00 41.00 0.00 0.00 0.00 42.00 0.00 0.00 0.00 43,00 0.00 0.00 0,00 44.00 0.00 0.00 0.00 45.00 0.00 0.00 0.00 46.00 0.00 0.00 0.00 47.00 0.00 0.00 0.00 48.00 0.00 0.00 0.00 49.00 0.00 © 0.00 0.00 50.00 0.00 0.00 0.00 51.00 0.00 © 0.00 0.00

NOAA 24-hr D 100-Year Rainfali=8.66" Printed 8/5/2022 4 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC Summary for Link 3L: Mt. Pleasant Ave - Undetained Inflow Area = 0.965 ac, 4.06% Impervious, Inflow Depth = 5.64" for 100-Year event Inflow = = 5.28cfs@ 12.17 hrs, Volume= 0.453 af Primary = 5.28 cfs @ 12.17 hrs, Volume= 0.453 af, Atten= 0%, Lag= 0.0 min Routed to Link 2L : Mt. Pleasant Ave. Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Link 3L: Mt. Pleasant Ave - Undetained Hydrograph Inflow Area=0.965 ac Flow (cfs) ° QB 4G 8 TOTS TAT TO 20 22 28 26 26 30 32 96 96.98.40 42 44 46 48 80 62 54 86 £8 GO €2 64 68 68 70 72 “Time (hours) 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-2d s/n 08640_© 2021 HydroCAD Software Solutions LLC (cfs) NOAA 24-hr D 100-Year Rainfall=8.66" Printed 8/5/2022 4 ‘Hydrograph for Link 3L: Mt. Pleasant Ave - Undetained Inflow Elevation Primary

2022-07-28 Proposed Hydrology Table of Contents Prepared by Dynamic Engineering Printed 8/5/2022 HydtoCAD® 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC TABLE OF CONTENTS Routing Diagram Project Notes Rainfall Events Listing (selected events) Soil Listing (all nodes) Ground Covers (all nodes) Subcat 4S: Basin B - Imp. 15. Suboat 5S: Basin B - Perv. 17 Subcat 7S: Basin C - imp. ‘Subcat 10S: Mt. Pleasant Ave Undetained - Perv. 25 Subcat 11S: Basin D - Imp. 27 Subcat 12S: Basin D - Perv. 29 Pond 3P: Basin A 35 Pond 4P: Basin B 41 Pond 5P: Basin C 47 Pond 6P: Basin D 53. Link 2L: Mt. Pleasant Ave. 55. Link 3L: Mt. Pleasant Ave - Undetained 10-Year Event 57 Node Listing 59 Subcat 18: Basin A - Imp. Subcat 38: Basin A - Perv. 67 Subcat 7S: Basin C - Imp. 69 Subcat 8S: Basin C - Perv. 71 Subcat 9S: Mt. Pleasant Ave Undetained - Imp. 73 Subcat 10S: Mt. Pleasant Ave Undetained - Perv, 75 Subcat 11S: Basin D - Imp. 77 Subcat 12S: Basin D - Perv. 79 Pond 3P: Basin A 85 Pond 4P: Basin B 91 Pond SP: Basin C 97 Pond 6P: Basin D 103. Link 2L: Mt. Pleasant Ave. 105. Link 3L: Mt. Pleasant Ave - Undetained 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-2d_sin 08640 © 2021 HydroCAD Software Solutions LLC. Table of Contents Printed 8/5/2022 100-Year Event 107 Node Listing 109 Subcat 18: Basin A - Imp. 111 Subcat 3S: Basin A - Perv. 113 Subeat 4S: Basin B - Imp. 115 Subcat 5S: Basin B - Perv. 117 Subcat 7S: Basin C - Imp. 119 Subeat 8S: Basin C - Perv. 121 Subcat 9S: Mt. Pleasant Ave Undetained - Imp. 123 Subcat 10S: Mt. Pleasant Ave Undetained - Perv. 125 Subcat 11S: Basin D - Imp. 127 Subcat 12S: Basin D - Perv. 129 Pond 3P: Basin A 135 Pond 4P: Basin B 141 Pond SP: Basin C 147 Pond 6P: Basin D 153. Link 2L: Mt. Pleasant Ave. 155. Link 3L: Mt. Pleasant Ave - Undetained

HYDROGRAPH SUMMARY REPORTS - WATER QUALITY STORM