2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" 2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 8/5/2022 Prepared by Dynamic Engineering Printed 9/5/2022 jroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC HydroCAD® 10.20-24 sin 08640 © 2021 HydroCAD lutions LLC Pond 3P: Basin A 'Hydrograph for Pond 3P: Basin A Stage-Area-Storage ‘SurfacolHorizontalWoted Area (st Time Inflow Storage Elevation Primary 19200 490 800. 890 1,000 1,200 1,400 1,00 1.800 2,0002:200 2.400 2.6002.8003,000 9,200,400 3.600 3.800 cfs) 0.00 0.00 oO 624.00 0.00 2.50 0.00 5 624.00 0.00 hea 5.00 0.00 34 624.02 0.00 7.50 0.01 85 624.04 0.00 10.00 0.02 180 624.09 0.00 12.50 0.29 1,745 624,80 0.00 15.00 0.05 2,723 625.19 0.00 17.50 0.03 3,103 625.33 0.00 20,00 0.03 3,359 625.42 0,00 i 22.50 0.02 3,572 625.50 0.00 5 25,00 0.00 3,691 625.54 0.00 ; 27.50 0.00 3,691 625.54 0,00 H 30.00 0.00 31691 625.54 0.00 a 32.50 0.00 3,691 625.54 0.00 35.00 0.00 3,691 625.54 0.00 37.50 0,00 3,691 625.54 0.00 40.00 0.00 3691 625.54 0.00 42.50 0.00 3,691 625.54 0.00 —7——___7 45.00 0.00 3691 625.54 0.00 6a 47.50 0.00 3,691 625.54 0.00 ‘0 woo 1900 4800 290 2500 o1800 3500 4000 400 S500 S00 Go00 a0 7.050 Yaa 8600 B00 50,00 0.00 31691 625.54 0.00 ‘Slovene NERS, 52.50 0.00 3,691 625.54 0.00 55.00 0.00 3,691 625.54 0.00 57.50 0.00 3,691 625.54 0.00 60.00 0.00 3,691 625.54 0.00 62.50 0.00 3,691 625.54 0.00 65.00 0.00 3,691 625.54 0.00 67.50 0.00 3,691 625.54 0.00

2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering NOAA 24-hr D 2-Year Rainfall=3.44" Printed 8/5/2022 roCAD Software Solutions LLC Elevation Primary (feet) (cfs) Stage-Discharge for Pond 3P: Basin A Elevation Primary Elevation Primary 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydreCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC NOAA 24-hr D 2-Year Rainfall=3.44" Printed 8/5/2022 Elevation fest) ‘Stage-Area-Storage for Pond 3P: Basin A Storage (cubic-feet) Storage Page 34

2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" 2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 9/5/2022 Prepared by Dynamic Engineering Printed 8/5/2022 HW “AD® 10,20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC 10.20-2d_s/n 08640 © 2021 HydroCAD Software Sotutions LLC Summary for Pond 4P: Basin B Pond 4P: Basin B Hydrograph Inflow Area= 0.831 ac, 12.83% Impervious, Inflow Depth = 1.46" for 2-Year event Inflow = —1.19cfs@ 12.18hrs, Volume= 0.101 af Outflow 0.00 cfs@ 0.00 hrs, Volume= 0,000 af, Atten= 100%, Lag= 0.0 min Primary 0.00 cfs@ _0.00hrs, Volume= 0.000 af Inflow Area=0.831 ac Routed to Link 2L : Mt, Pleasant Ave. Peak Elev=623.78" Routing by StorInd method, Time Span= 0,00-72.00 hrs, dt= 0.05 hrs = Peak Elev= 623.78' @ 24.60 hrs Surf.Area= 3,012 sf Storage= 4,396 cf Storage=4,396 cf Plug-Flow detention time= (not caloulate Center-of-Mass det. time= (not calculate Flow (cf) Volume __Invert__Avail.Storage Storage Description 1 622.00" 8,561 cf Custom Stage Data (Prismatic) Listed below (Recalo) Elevation Surf Area Inc.Store Cum.Store (feet) (sg-ft) (cubic-feet) (cubic-feet) 622.00 1,951 0 0 623.00 2,519 2,235 2,235 624.00 3,150 2,835 0 625.00 3,833 3,492 (0-2 4 6 8 3012 34 $6 18 20 22 24 26.28 90 92 34 90 38 40 42 44 40 48 50.52 S4 $6 58 00 62 64 66.60 70 72 “Time (hours) Device _ Routing Invert Outlet Devices 4 Primary 623.80 6.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Pond 4P: Basin B Stago-Discharge grimary QutFlow Max=0.00 cfs @ 0.00 hrs HW=622.00' (Free Discharge) |=Orifice/Grate ( Controls 0.00 cfs) a | Elevation (foot) Discharge (cfs)

2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" 2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" 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 38 Hydrograph for Pond 4P: Basin B Pond 4P: Basin B Stage-Area-Storage Time Inflow Storage Elevation Primary ‘Surface/Horlzontainvattod Area(s) 9.2, 9 fo: sp a se aonamat eam Reonaenmm a amoemoaN a TEs) ee) ‘cia 7 ‘© 5D0" 1,000 1.800 2,000 2,800 3,000 3,00 4,000 4,500,000 §,500 6,000 6,500 7,000 7,500 8,000 8,500 ‘Storage eublefet)

2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" 2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 8/5/2022 Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d sin 10_© 2021 HydroCAD Software Solutions LLC HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 40 ‘Stage-Discharge for Pond 4P: Basin B ‘Stage-Area-Storage for Pond 4P: Basin B Elevation Primary | Elevation Primary | Elevation Primary ‘Surface Storage | Elevation Surface Storage (feet) (cfs) (feet) (cfs) (sq-ft) (cubic-feet) (feet) (sq--ft) (cubic-feet) 622,00 0.00 623,04 0.00 . 1,951 0 624.60 3,560, 7,082 622.02 0.00 1,979 98 624.65 3,594 7,261 622.04 0.00 2,008 198 624.70 3,628 7,442 622.06 0.00 2,036 299 624.75, 3,662 7,624 622.08 0.00 2,065 402 624.80 3,696 7,808 622.10 0.00 2,093 506 624.85 3,731 7,994 622.12 0.00 2,121 611 624,90 3,765 8,181 622.14 0.00 2,150 718 624.95 3,799 8,370 622.16 0.00 2,178 826 625.00 3,833 8,561 622.18 0.00 2,207 935 622.20 0.00 2,235 1,047 622,22 0.00 2,263 1,159 622.24 0.00 2,292 1,273 622.26 0.00 2,320 1,388 622.28 0,00 2,349 1,505 622.30 0.00 2,377 1,623 622,32 0.00 2,405 1,743 622.34 0,00 2,434 1,864 622.36 0,00 2,462 1,986 622.38 0.00 2,491 2,110 622.40 0,00 2,519 2,235 622.42 0,00 2,551 2,362 622.44 0,00 2,582 2,490 622.46 0.00 2,614 2,620 622.48 0.00 2,645 2,751 622.50 0.00 2,677 (2,884 622.52 0.00 2,708 3,019 622.54 0.00 2,740 3,155 622.56 0.00 2771 3,293 622.58 0.00 2,803 3,432 622.60 0.00 2,835 3,573 622.62 0.00 2,866 3,716 622.64 0.00 2,898 3,860 622.66 0.00 2,929 4,006 622.68 0.00 2,961 4,153 622.70 0.00 2,992 4,302 622.72 0.00 3,024 4,452 622.74 0.00 3,055 4,604 622.76 0.00 3,087 4,758 622,78 0.01 3,118 4,913 622,80 0.04 3,150 5,070 622.82 0.08 3,184 5,228 622.84 0.12 3,218 5,388 622.86 016 3,252 5,550 622.88 021 3,287 5,713 622.90 027 3,321 5,878 622.92 0.33 3,355 6,045 622.94 0.39 3,389 6,214 622.96 0.42 3,423 6,384 622.98 0.44 3,457 6,556 623.00 0.46 3,492 6,730 623.02 0.48 3,526 6,905

2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 8/5/2022 roCAD® 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC 4 ‘Summary for Pond 5P; Basin C Inflow Area = 0.821 ac, 12.95% impervious, Inflow Depth = 1.46" for 2-Year event Inflow = 4.12cfs@ 12.18hrs, Volume= 0.100 af Outfiow = 0.00 cfs @ 0.00 hrs, Volume= 0,000 af, Atten= 100%, Lag= 0.0 min Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Link 2L : Mt. Pleasant Ave. Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 620.24' @ 24.60 hrs SurfArea= 3,049 sf Storage= 4,350 cf Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= (not calculated: no outflow) Volume. Invert___Availl Storage _ Storage Description ca 618.50" 8,744 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation ‘Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 618.50 1,966 0) 0 619.00 2,285 4,063 1,063, 620.00 2,892 2,589 3,651 621.00 3,560 3,226 6,877 621.50 3,907 1,867 8,744 Device Routing Invert __Outlet Devices #1 Primary 620.50' 8.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads imary OutFlow Max=0.00 cfs @ 0.00 hrs HW=618.50' (Free Discharge) |=Orifice/Grate ( Controls 0.00 cfs) 2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC Page 42 Pond 5P: Basin C Hydrograph eS) Inflow Area=0.821 ac Peak Elev=620.24' Storage=4,350 cf Flow (cfs) © 2 4 6 8 1042 $4 6 820 22 24 26 20 30 32 34 30 38 40 42 44 46 40 50 52 54 $6 58 60 62 64 60 68 70 72 ‘Time (hours) Pond 5P: Basin C ‘Stage-Discharge eat Elevation (oet) § i] 7 Discharge (cfs)

2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-2d_s/n 08640 © 2021 Hj Elevation (Fest) 3.900 3500 NOAA 24-hr D 2-Year Rainfall=3.44" Printed 8/5/2022 ll ‘Boo 11800 17300 2900 2500 8000 3,00 4,000 4.800 5.000 6.500 6.000 6.800 7,000 7,800 8,000 8.500 ‘Storage cuble-fet) 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD®@ 10.20.24 sin 08640 © 2021 HydroCAD Software Solutions LLC. 44 NOAA 24-hr D 2-Year Rainfall=3.44" Printed 8/5/2022 Hydrograph for Pond 5P: Basin C Storage Elevation

2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering NOAA 24-hr D 2-Year Rainfall=3.44" Printed 8/5/2022 HydtoCAD® 10.20-24 sin 08640 © 2021 HydroCAD Software Solutions LLC. ‘Stage-Discharge for Pond 5P: Basin C Elevation Primary Elevation Primary 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering Stage-Area-Storage for Pond 5P: Basin C Storage cubic-feet) Elevation (feet) 621.10 621.15 621.20 621.25 621.30 621.35 621.40 621.45 621.50 NOAA 24-hr D 2-Year Rainfall=3.44" HydroCAD® 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC. ‘Surface so-ft Storage (cubic-feet) Printed 9/5/2022

NOAA 24-hr D 2-Year Rainfall=3.44" Printed 8/5/2022 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC Summary for Pond 6P: Basin D 0.422 ac, 13.06% Impervious, Inflow Depth = 1.46" for 2-Year event = 0.57 cfs@ 12.18 hrs, Volume= 0.051 af Outflow = 0.00cfs@ 0.00 hrs, Volume= 0.000 af, Atten= 100%, Lag= 0.0 min Primary = 0.00cfs@ 0.00 hrs, Volume= 0.000 af Routed to Link 2L ; Mt. Pleasant Ave. Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 616.00’ @ 24.60 hrs Surf.Area= 2,520 sf Storage= 2,238 cf I storage exceeds outflow) Center-of-Mass det. time= (not calculated: no outflow) Volume Invert___Avail,Storage Storage Description ca 615.00" 8,561 of Custom Stage Data (Prismatic) Listed below (Recalc) Elev: ‘Surf.Area Inc.Store Cum.Store (sq-ft) (cubic-feet) {cubic-feet) 615.00 0 616.00 2,235 617.00 5,070 618.00 8,561 Device Routing #1 Primary 616.50’ 8.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads frimary OutFiow Max-0.00 of @ 0.00 hrs j=Orifice/Grate ( Controls 0.00 cfs) 2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 8/5/2022 ia) 10.20-2d_ sin 10_© 2021 HydroCAD Software Solutions LLC Elevation (feat) oss Storage=2,238 cf or. on Pond 6P: Basin D Hydrograph Inflow Area=0.422 ac Peak Elev=616.00' O24 6 8 woz te 46 1520722428 2 90 32 49 98 A042 44 4.4 898264 $8 986062 466057072 “Time (hours) Pond 6P: Basin D Stage-Discharge Discharge (cfs)

2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 9/5/2022 {foCAD® 10.20-24 s/n 08640 © 2021 HydroCAD Software Solutions LLC 4s Pond 6P: Basin D Stage-Area-Storage Surlacatorizontatvvotted Aros (29) 19 200 400 690 890 1.000 1.200 1.400 1,600 1,6002.000 2.200 2.400 2.002.200 3.000 3,200,400 3.600 3.800 P=] su 617 Elevation (Fast) a el ‘0 800. 1,000 1,800 000 2800 5,000 300 4,000 4,800 5.000 5500 6,000 6.200 7,000 7,300 6.000 8300 ‘Storage cuble-feot) 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering 40.20-24 sin 08640 © 2021 HydroCAD Software Solutions LLC NOAA 24-hr D 2-Year Rainfall=3.44" Printed 8/5/2022 Hydrograph for Pond 6P: Basin D Storage Elevation Primary cfs)