2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD@ 10.20-24_ sin 08640 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Basin B - Perv. Runoff = 4,82 cfs @ 12.18 hrs, Volume= 0.153 af, Depth= 2.54" 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 10-Year Rainfall=5.22" Area (sf) 31,571 74 _>75% Grass cover, Good, HSG C 31,571 10.00% Pervious Area Te Length Slope Velocity Capacity Descri (min) (feet) __(ft/ft)__ (ft/sec) (cfs) 10.0 Direct Entry, Direct Subcatchment 5S: Basin B - Perv. Hydrograph NOAA 24-hr D 10-Year Rainfall=5.22” Runoff Area=31,571 sf Runoff Volume=0.153 af Runoff Depth=2.54" Tc=10.0 min CN=74 Flow (cfs) ID V2 14 TO 1020 22 24 26 28 30 32 34 36 38 40 42.44 46 48.50 52 64 6 98 GO 62 C4 66 68.70 72 ‘Time (hours) 2022-07-28 Proposed Hyd! gy NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 9/5/2022 HydroCAD® 10.20-2d_s/n 08640 _© 2021 HydroCAD Software Solutions LLC Page 66 Time Precip. Excess hours) (inches) (inches) Hydrograph for Subcatchment 5S: Basin B - Perv. Time Precip. Excess Runoff

2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=5.22" 2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=6.22" Prepared by Dynamic Engineering Printed 9/5/2022 Prepared by Dynamic Engineering Printed 9/5/2022 HydroCAD® 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC 7 HydroCAD® 10.20-2d_ s/n 10_© 2021 HydroCAD Software Solutions LLC Pe Summary for Subcatchment 7S: Basin C - Imp. Hydrograph for Subcatchment 7S: Basin C - Imp. Runoff = — 0.45¢fs@_ 12.17 hrs, Volume= 0.044 af, Depth= 4.98" Time Precip, Excess Runoff Routed to Pond §P : Basin C urs) (inches) (inches 52.00 5.22 4.98 0.00 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0,00-72.00 hrs, dt= 0.05 hrs Sig eae! ae ea NOAA 24-hrD 10-Year Rainfall=5.22' outa aoe 488 _ Hi 56.00 5.22 4.98 0.00 Area (sf)__CN Description 87.00 5.22 4.98 0.00 4,635 98 Unconnected pavement, HSG C. 5800 5.22 4.98 0.00 4,635 100.00% Impervious Area 7 7 oa "i ea 3 oe 4,635 100.00% Unconnected oe 82 ie ace o a 22 4.98 0.00 Te Length Slope Velocity Capacity Description on 2 (min) (feet)__(fift)_(fsec)__ (cfs) eon 822488 000 10.0 Direct Entry, Direct 65.00 622 4.98 0.00 66,00 5.22 4.98 0.00 Subcatchment 7S: Basin C - Imp. 67.00 5.22 4.98 0.00 68.00 5.22 4.98 0.00 Hydrograph 69.00 522 4.98 0.00 70.00 522 4.98 0,00 Gea 71.00 5.22 4. 7 0.00 72.00 5.22 4 0.00 NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=4,635 sf Runoff Volume=0.044 af Runoff Depth=4.98" Tc=10.0 min CN=98

2022-07-28 Proposed Hydrology NOAA 24-hr D_ 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 8S: Basin C - Perv. Runoff = 1.79 cis @ 12.18 hrs, Volume= 0.151 af, Depth= 2.54" Routed to Pond 5P : Basin G 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 10-Year Rainfall=5.22" Area (sf)__CN__Description 31,149 _74_>75% Grass cover, Good, HSG C 31,149 7100.00% Pervious Area Te Length Slope Velocity Capacity Description (min) (feet) _(fv/t)_(flsec)___(ofs) 10.0 Direct Entry, Direct Subcatchment 8S: Basin C - Perv. Hydrograph * =) NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=31,149 sf Runoff Volume=0.151 af Runoff Depth=2.54" Tc=10.0 min CN=74 Flow (cfs) o O°2 AG 8 NOTE Te We TORO a2 BO 203032 34D 8.40 ato 4 80 2 F098 0 020465 687072 2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=6.22" Prepared by Dynamic Engineering HydroCAD® 10.20-2d s/n 08640_© 2021 HydroCAD Software Solutions LLC Printed 8/5/2022 Page 70 Hydrograph for Subcatchment 8S: Basin C - Perv. Runoff (cfs)

NOAA 24-hr D 10-Year Rainfall=5.22" 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 Subcatchment 9S: Mt. Pleasant Ave Undetained - Imp. Runoff = 0.17 cfs @ 12.17 hrs, Volume= Routed to Link 3L : Mt. Pleasant Ave - Undetained 0.016 af, Depth= 4.98" 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 10-Year Rainfall=5.22" Area (sf)__CN Description 1,085 98 Unconnected pavement, HSG C 621__98__Unconnected pavement, HSG D. 7,706 98 Weighted Average 1,706 100.00% Impervious Area 1,706 100.00% Unconnected Te Length Slope Velocity Capacity Description (min) (feet) (f/f) (fusec)___ (cfs) 10.0 Direct Entry, Direct Subcatchment 9S: Mt. Pleasant Ave Undetained - Imp. Hyarograph NOAA 24-hr D 10-Year Rainfall=5.2: Runoff Area=1,706 sf Runoff Volume=0.016 af Runoff Depth=4.98" Tc=10.0 min CN=98 Bb ea 24 we 20 9032 4383840424 48S 525 5 88,0 626 86007072 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC NOAA 24-hr D 10-Year Rainfall=5.22" Printed 8/5/2022 Page Hydrograph for Subcatchment 9S: Mt. Pleasant Ave Undetained - Imp. Time Precip. Excess Runoff | Time Precip. Excess Runoff 1.00 0.06 0.00 200 0.13 0.02 3.00 0.20 0.07 400 027 0.12 5.00 0.36 0.19 600 0.45 0.27 700 055 0.36 3.00 0.68 0.48, 9.00 0.83 0.63, 10.00 1.03 0.82 14.00 1.36 1.14 1200 250 227 1300 3.86 © 3.63 14.00 4.19 3.95 15.00 4.39 4.16 1600 4.54 4.31 17.00 4.67 4.43 1800 4.77 4.54 19.00 486 4.63 2000 4.95 4.71 21.00 5.02 4.79 22.00 5,09 4.86 23.00 5.16 4.92 24.00 5.22 4,98 25.00 5.22 4.98 26.00 5.22 4.98 27.00 5.22 4.98 28.00 522 4.98 29.00 5.22 4.98 30,00 6.22 4.98 31.00 5.22 4.98 3200 5.22 4.98 33.00 5.22 4.98 34.00 5.22 4.98 95.00 5.22 4.98 36.00 5.22 4.98 37.00 5.22 4.98 38.00 5.22 4.98 39.00 5.22 4.98 40.00 5.22 4.98 41,00 5.22 4.98 42.00 5.22 4.98 43,00 5.22 4.98 4400 5.22 498 45.00 5.22 4.98 46.00 5.22 4.98 47.00 5.22 4,98 48.00 5.22 4,98 49.00 5.22 4.98 50.00 5.22 4.98 51.00 5.22 4.98

2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=5.22" 2022-07-28 Proposed Hydrol NOAA 24-hr D 10-Year Rainfall=6.22" oposed Hydrology Prepared by Dynamic Engineering Printed 8/5/2022 Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD®@ 10.20-2d_sin 08640 © 2021 HydroCAD Software Solutions LLC __Page 73 HydroCAD@ 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 74 Summary for Subcatchment 10S: Mt. Pleasant Ave Undetained - Perv. Hydrograph for Subcatchment 10S: Mt. Pleasant Ave Undetained - Perv. Runoff = —2.32cfs@ 12.18hrs, Volume= 0.196 af, Depth= 2.54" Time Precip. Excess Runoff | Time Precip. Excess Runoff Routed to Link 3L : Mt. Pleasant Ave - Undetained (hours) (inches) (inches) (cfs) | (hours) (inches) (inches) (cts) 0.00 0.00 0.00 0.00 52.00 2.54 0.00 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs a 9.00 9.00 | 53.00 2a 0.00 NOAA 24-hrD 10-Year Rainfall=5.22" An toy noel {| saeco Ba He 4.00 0,00 0.00 | 56.00 pest 0.00 Area (sf)_ CN Description 5.00 0.00 0.00 | 57.00 2.54 0.00 38,200 74 _>75% Grass cover, Good, HSG C 6.00 0.00 0.00 | 58.00 254 0.00 2.119 80 __>75% Grass cover, Good, HSG D 7.00 0.00 0.00 | 58.00 2.54 0.00 fogs aati eee 300 dco aor | 61.00 ze 0.00 pd ine: Romoue re 10.00 0.03 0.03 | 62.00 2.54 0.00 Te Length Slope Velocity Capacity Description Wie car eed _ ed (min) (feet) (fut) _(flisec) _(cfs)__ 13.00 1.50 0.36 | 65.00 254 0.00 10.0 Direct Entry, Direct 14.00 173 ots | 68.00 254 0.00 15.00 1189 013 | 67.00 254 0.09 ined - 16.00 201 0.10 | 68.00 254 0.00 Subcatchment 10S: Mt. Pleasant Ave Undetained - Perv. iviod 310 O09 | 68.00 eed 0.00 Hydrograph 18.00 2.19 0.07 70.00 2.54 0.00 49.00 2.26 0.08 | 71.00 254 0.00 Ge} 20.00 2.32 00s | 72.00 254 0.00 21.00 238 0.06 NOAA 24-hr D 22.00 244 0.05 7 0 23.00 49 0.05 2 10-Year Rainfall=5.22 24.00 2.54 0.04 =, 25.00 2.54 0.00 R Font ee ; = 26.00 on on lume=0. a 27.00 2.54 0,00 = nner Volumerd a 28.00 254 0.00 z Runoff Depth=2.54 29.00 254 0.00 30,00 2.54 0.00 H Te=10.0 min 31.00 254 0.00 1 = 32.00 254 0.00 CN=74 33,00 2.54 0.00 34.00 2.54 0.00 35.00 2.54 0.00 36.00 254 0.00 37.00 254 0.00 38.00 254 0.00 ‘ 39.00 254 0.00 40.00 2.54 0.00 OUR H BB TOT WWI DTD 202850321 3884042 a0 a8 SOD BP Oe SBD G2 O48 BBTO Te pad Bo ny 42.00 2.54 0.00 43.00 254 0.00 44.00 2.54 0.00 45.00 254 0.00 46.00 2.54 0.00 47.00 254 0.00 48.00 2.54

00 2.54 0.00 OUR H BB TOT WWI DTD 202850321 3884042 a0 a8 SOD BP Oe SBD G2 O48 BBTO Te pad Bo ny 42.00 2.54 0.00 43.00 254 0.00 44.00 2.54 0.00 45.00 254 0.00 46.00 2.54 0.00 47.00 254 0.00 48.00 2.54 0.00 49.00 2.54 0.00 50.00 2.54 0.00 51.00 2.54 0.00

2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=5,22" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC. P: 7: ‘Summary for Subcatchment 11S: Basin D - Imp. Runoff = 0.23 cfs @ 12.17 hrs, Volume= 0.023 af, Depth= 4.98" 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 10-Year Rainfall=5.22" Area(sf)__CN__Description 2,400 98 Unconnected pavement, HSG C 2,400 100.00% Impervious Area 2,400 100.00% Unconnected Te Length Slope Velocity Capacity Desor (min) (feet) __(ft/ft) _(fl/sec) (cfs) 10.0 Direct Entry, Direct Subcatchment 11S: Basin D - Imp. Hydrograph -NOAA 24-hr'D 10-Year Rainfall=5.22" Runoff Area=2,400 sf Runoff Volume=0.023 af_ -Runoff Depth=4.98" Tc=10.0 min CN=98 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 11S: Basin D - Imp. NOAA 24-hr D 10-Year Rainfall=5.22" Printed 8/5/2022 P:

2022-07-28 Proposed Hydrology NOAA 24-hrD 10-Year Rainfall=5.22" 2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 8/5/2022 Prepared by Dynamic Engineering Printed 8/6/2022 HydroCAD@ 10.20-2d_ s/n 08640_© 2021 HydroCAD Software Solutions LLC. P: wa HydroCAD® 10.20-2d_s/n 08640_© 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 12S: Basin D - Perv. Hydrograph for Subcatchment 12S: Basin D - Perv. Runoff = = 0.92 cis @ 12.18 hrs, Volume= 0.078 af, Depth= 2.54" Time Precip. Excess Runoff Time Precip, Excess Runoff Routed to Pond 6P : Basin D hours) (inches) (inches) (cfs) | (hours) (inches) (inches) 0.00 0.00 0.00 52.00 5.22 0.00 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs mee 0.00 0.00 |) 5300 5.22 ed NOAA 24-hr D 10-Year Rainfall=5.22" 2.00 0.00 G00) || S400 5.22 one 3.00 0.00 0.00 55.00 5.22 0.00 voli 4.00 0.00 0.00 | 56.00 5.22 0.00 Area (sf)__CN Description 5.00 0.00 00 | 57.00 5.22 0.00 15,983 74 _>75% Grass cover, Good, HSG C 6.00 0.00 0.00 | 5800 5.22 0.00 15,983 7100.00% Pervious Area 7.00 0.00 000 | sa00 5.22 0,00 8.00 0,00 0.00 60.00 5,22 0.00 Te Length Slope Velocity Capacity Description 9.00 0.00 G00 | 81.00 5.22 9.00 {rin)__(feet) _(t)_{fusee)_ (ef too ora dor | 6300 Sa8 o.99 10.0 Direct Entry, Direct 12.00 061 038 | 64.00 5.22 0.00 13,00 1.50 0.146 65.00 5.22 0,00 Subcatchment 12S: Basin D - Perv. 14.00 1.73 0,07 66.00 5.22 0.00 15.00 1.89 0.05 67.00 5.22 0.00 Hydrograph 16.00 2.01 0.04 | 68.00 5.22 0.00 17.00 2.10 0.03 | 69.00 5.22 0.00 * 18.00 2.19 0.03 | 70.00 5.22 0.00 19.00 2.26 0.03 | 74.00 5.22 0.00 NOAA 24-hr D 20.00 2332 002 | 7200 5.22 0.00 infall=5.22" 21.00 2:38 0.02 10-Year Rainfall=5.22 22.00 344 0.02 =" 23,00 249 0.02 Runoff Area=15,983 sf oon 2a oe Runoff Volume=0.078 af 25.00 254 0.00 z 26.00 0.00 g Runoff Depth=2.54' 27.00 284 0.00 2 7 28.00 2.54 0.09 Ed Tc=10.0 min Erg ou 0.00 CN=74 30,00 2.54 0.00 31.00 2.54 0.00 32,00 2.54 0.00 33.00 2.54 0.00 34.00 2.54 0.00 35.00 2.54 0.00 36.00 254 0.00 of 37.00 2.54 0.00 O24 6 8 WIT 10 1820 22 24 20 28 30 32 34 36 38 40 42 44 46 48 20 52 54 50 8.60 62 64 65 08 70 72 38.00 2.54 0.00 ‘Tine (hours) 39.00 2.54 0.00 40.00 2.54 0.00 41.00 2.54 0.00 42.00 2.54 0.00 43.00 2.54 0.09 44.00 2.54 0.00 45.00 2.54 0.00 46,00 2.54 0.00 47.00 2.54 0.00 48.00 2.54 0.00 49.00 2.54 0.00 50.00

0.00 ‘Tine (hours) 39.00 2.54 0.00 40.00 2.54 0.00 41.00 2.54 0.00 42.00 2.54 0.00 43.00 2.54 0.09 44.00 2.54 0.00 45.00 2.54 0.00 46,00 2.54 0.00 47.00 2.54 0.00 48.00 2.54 0.00 49.00 2.54 0.00 50.00 2.54 0.00 51.00 2.54 0.00

2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=5,22" Prepared by Dynamic Engineering Printed 8/5/2022 © 2021 HydroCAD Software Solutions LLC P: 72 Summary for Pond 3P: Basin A Inflow Area = 0.669 ac, 15.97% Impervious, Inflow Depth = 2.93" for 10-Year event Inflow = = 1.87 cfs @ 12.17 hrs, Volume= 0.163 af Outflow = 0.09 cfs @ 15.32 hrs, Volume= 0.047 af, Atten= 95%, Lag= 188.8 min Primary = 0.09 cfs @ 15.32 hrs, Volume= 0.047 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= 626.06 @ 15.32 hrs Surf,Area= 3,194 sf Storage= 5,275 cf Plug-Flow detention time= 479.7 min calculated for 0.047 af (29% of inflow) Center-of-Mass det, time= 309.1 min ( 1,132.2 - 823.1 ) Volume. Invert __Avail,Storage _Storage Description #1 624.00" 8,561 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation ‘Surf.Area Inc.Store ‘Cum.Store (feet) (sg-ft) (cubic-feet) (cubic-feet) 624.00 1,951 0 0 625.00 2,519 2,235 2,235 626.00 3,150 2,835 5,070 627.00 3,833 3,492 8,561 Device _Routing Invert__Outlet Devices #1 Primary 26.00’ 6.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads rimary OutFlow Max=0.08 fs @ 15.32 hrs HW=626.06' (Free Discharge) |=Orifice/Grate (Weir Controls 0.08 cfs @ 0.83 fps) 2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD@ 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC Pond 3P: Basin A Hydrograph Inflow Area=0.669 ac Peak Elev=626.06' Storage=5,275 cf Flow (cfs) 0-2-4 6 B 1012 1416 18.20 22 26 26 20 90:32 34 90 38 40 42 44 46 48 599 52 94 96 58 60 62 64 68 05.70 72 Time (hours) Pond 3P: Basin A ‘Stage-Discharge “ Eom Elevation (feat) Ce 0 Obs Of OW 02 G2 03 O55 O4 O45 OS O68 O68 OBS OT O15 08 Obs 09 DDlecharge (cts)