2022 08 Drainage Report

2022-07-21 Existing Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Hydrology Table of Contents Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD@ 10.20-2d_s/n 08640 _© 2021 HydroCAD Software Solutions LLC ig iroCAD® 10.20-2d_s/n 08640_© 2021 HydroCAD Software Solutions LLC Hydrograph for Link 2L: Mt. Pleasant Ave. ‘TABLE OF CONTENTS: Time Inflow Elevation Primary @ Inflow Elevation Primary Project Reports {hours (cfs (feet (cts) | hours) fs feet (cfs 1 Routing Diagram 0.00 0.00 0.00 0.00 | ~ 52.00 0.00 0.00 0.00 2 Project Notes 1.00 0.00 0.00 0.00 53,00 0.00 0.00 0.00 3 2.00 0.00 0.00 0.00 54.00 0.00 0.00 0.00 3.00 0.01 0.00 0.01 | 55.00 0.00 0.00 0.00 bd 4.00 0.01 0.00 0.01 56.00 0.00 0.00 0.00 5 5.00 0.01 0.00 0.01 57.00 0.00 0.00 0.00 6 Ground Covers (all nodes) 6.00 0.01 0.00 0.01 58.00 0.00 0.00 0.00 7.00 0.01 0.00 0.01 | 59.00 0.00 0.00 0.00 ay 8.00 0,08 0.00 0.08 60.00 0.00 0.00 0.00 7 Node Listir 9.00 017 0.00 017 | 61.00 0.00 0.00 0.00 e Listing 10.00 037 0.00 0.37 | 62.00 0.00 0.00 0.00 8 Subcat 1S: Mt. Pleasant Ave. 11.00 083 = 0.00 083 | 63.00 0.00 = 0.00 0.00 10 Subcat 3S: Mt. Pleasant Ave. - Perv. 12.00 4.01 0.00 401 64.00 0.00 0.00 0.00 12 ik 2L: Mt. Pleasant Ave. 13,00 3.79 0.00 3.79 65.00 0.00 0.00 0.00 14.00 1.49 0.00 1.49 66,00 0.00 0.00 0.00 10-Year Event 15.00 103 0.00 103 | 67.00 0.00 © 0.00 0.00 Jetear event 16.00 078 0.00 0.78 | 68.00 0.00 0.00 0.00 mena} 17.00 0.66 0,00 0,66 | 69.00 0,00 0.00 0.00 16 Subcat 1S: Mt. Pleasant Ave. - Imp. 18.00 054 = 0.00 asa | 70.00 0.00 0.00 0.00 17 Subcat 3S: Mt. Pleasant Ave. - Perv. 19.00 047 = 0.00 o47 | 71.00 000 © 0.00 0.00 419. Link 2L: Mt. Pleasant Ave. 20.00 0.44 0.00 0.44 72.00 0.00 0.00 0.00 21.00 Oat 0.00 0.41 22.00 038 © 0.00 0.38 Moo-Year Event 23.00 035 0.00 0.35 21 Node Listing 24.00 032 0.00 0.32 22. Subcat 1S: Mt. Pleasant Ave. - Imp. 25.00 0.00 © 0.00 0.00 24 Subcat 3S: Mt, Pleasant Ave. - Perv. 26,00 0.00 0.00 0.00 26 Link 2L: Mt, Pleasant Ave. 27.00 0.00 0.00 0.00 28.00 0.00 © 0.00 0.00 28.00 0.00 © 0.00 0.00 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 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 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

Basin owe c asin @) Wg es —= «i = ——~@ Undetsined Mt Pleasant Ave Undolained = Por OBE AS C= ees Sa eee HycroCADW 10.20-24 sin 08840 ©2021 HyerOCAD Software Solutions LLC 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 2 Project Notes Rainfall events imported from "NRCS-Rain.txt" for 6606 NJ Essex-D Rainfall events imported from "2022-04-05 Proposed Conditions.hcp” Rainfall events imported from "NRCS-Rain.txt” for 6606 NJ Essex-D

2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering Printed 9/5/2022 Hy 10,20-24 s/n 08640 © 2021 HydroCAD Software Solutions LLC Rainfall Events Listing (selected events) Event# Event Storm Type Curve Mode Duration B/B Depth AMC Name (hours) (inches) 1 2-Year = NOAA24-hr Default 24.00 1 344 2 2 10-Year NOAA24-hr D Default 24.00 1 522 2 3 100-Year NOAA24-hr D Default 24.00 1 866 2 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 4 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 3.246 74 >75% Grass cover, Goad, HSG C (35, 5S, 8S, 108, 128) 0.049 © 80 > 75% Grass cover, Good, HSG D 0.400 98 Unconnected pavement, HSG C (1S, 45, 75, 9S, 118) 0.014 98 Unconnected pavement, HSG D (98) 3709 77 TOTALAREA

2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-24 sin 08640 © 2021 HydroCAD Software Solutions LLC. Soil Listing (all nodes) Area Soil Subcatchment (acres) Group __ Numbers 0.000 HSGA 0.000 HSGB 9.646 HSGC 18,35, 45, 5S, 7S, 88, 9S, 108, 115, 128 0.063 HSGD 9S, 10S 0.000 Other 3.709 TOTAL AREA Printed 8/5/2022 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC Ground Covers (all nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground ‘Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0,000 3.246 0.049 0.000 3.295 >75% Grass cover, Good 3S, 5S, 8s, 108, 128 0,000 0.000 0.400 0.014 0.000 0.414 Unconnected pavement 15, 4S, 78, 9S, 11S 0.000 0.000 3.646 0.063 0.000 3.709 TOTAL AREA

2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10,20-24 sin 08640 © 2021 HydroCAD Software Solutions LLC Zz Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-ind+Trans method - Pond routing by Stor-Ind method ‘Subcatchment 1S: Basin A- Imp. Runoff Area=4,655 sf 10.00% Impervious Runoff Depth=3.21" Tc=10.0 min CN=98 Runoff=0.30 cfs 0.029 af Subcatchment 3S: Basin A - Perv. Runoff Area=24,500 sf 0.00% Impervious Runoff Depth=1.20" Tc=10.0 min CN=74 Runoff=0.65 cfs 0.056 af Subcatchment 4S: Basin B - Imp. Runoff Area=4,648 sf 10.00% Impervious Runoff Depth=3.21" Tc=10.0 min CN=98 Runoff=0.30 cfs 0.029 af ‘Subcatchment 5S: Basin B - Perv. Runoff Area=31,571 sf 0.00% Impervious Runoff Depth=1.20" Tc=10.0 min CN=74 Runoff=0.84 cfs 0.072 af ‘Subcatchment 7S: Basin C - Imp. Runoff Area=4,635 sf 10.00% Impervious Runoff Depth=3.21* To=10.0 min CN=98_ Runoff=0.30 cfs 0.028 af ‘Subcatchment 8S: Basin C - Perv. Runoff Area=31,149 sf 0.00% Impervious Runoff Depth=1.20" To=10.0 min CN=74 Runoff=0.82 cfs 0.071 af Subcatchment 9S: Mt. Pleasant Ave Runoff Area=1,706 sf 100.00% Impervious Runoff Depth=3.21" Tc=10.0 min CN=98 Runoff=0.11 cfs 0.010 af ‘Subcatchment 10S: Mt. Pleasant Ave Runoff Area=40,319 sf 0.00% Impervious Runoff Depth=1.20" Te=10.0 min CN=74 Runoff=1.07 cfs 0.092 af ‘Subcatchment 11S: Basin D - Imp. Runoff Area=2,400 sf 100.00% Impervious Runoff Depth=3.21" To=10.0 min CN=98 Runoff=0.16 cis 0.015 af ‘Subcatchment 12S: Basin D - Perv. Runoff Area=15,983 sf 0.00% Impervious Runoff Depth=1,20" Tc=10.0 min CN=74 Runoff=0.42 cfs 0.037 af Pond 3P: Basin A Peak Elev=625.54' Storage=3,691 cf_Inflow=0.94 ofs 0.085 af Qutflow=0.00 cfs 0.000 af Pond 4P: Basin B Peak Elev=623,78' Storage=4,396 of inflow=1.13 cfs 0.101 af Qutflow=0.00 cfs. 0.000 af Pond 5P: Basin C Peak Elev=620.24' Storage=4,350 cf _Inflow=1.12 cfs 0.100 af ‘Outflow=0.00 cfs 0.000 af Pond 6P: Basin D Peak Elev=616.00' Storage=2,238 cf _Inflow=0.87 cfs 0.051 af Qutflow=0.00 cfs 0.000 af Link 2L: Mt. Pleasant Ave. cfs 0.103 af Link 3L: Mt. Pleasant Ave - Undetained 2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-24 s/n 08640 © 2021 HydroCAD Software Solutions

sant Ave - Undetained 2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-24 s/n 08640 © 2021 HydroCAD Software Solutions LLC Total Runoff Area = 3.709 ac_ Runoff Volume = 0.440 af Average Runoff Depth = 1.42" 88.83% Pervious = 3.295 ac 11.17% Impervious = 0.414 ac

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 P: HydroCAD® 10.20-24 s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 10 Summary for Subcatchment 1S: Basin A - Imp. Hydrograph for Subcatchment 1S: Basin A - Imp. Runoff = 0.30 cfs @ 12.17 hrs, Volume= 0.029 af, Depth= 3.21" Time Precip. Excess Runoff Time Precip. Excess Runoff Routed to Pond 3P : Basin A hours) (inches) (inches) _(cfs) 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 nod aul 0.00 NOAA 24-hr D 2-Year Rainfall=3.44" : i be 3.00 0.03 0.00 as 4.00 .( 0.00 Area(sf)__CN Description ao oe (wo 4,655 98 _Unconnected pavement, HSG C. 6.00 014 0.01 4,655 100.00% Impervious Area 7.00 0.20 0.01 4,655 4100.00% Unconnected 8.00 027 0.01 9.00 036 0.01 Tc Length Slope Velocity Capacity Description 10,00 . 4.02 (min) (feet) _(ftt)_(fusec)_" (cfs) HS Waa aae 10.0 Direct Entry, Direct 43.00 232 0.04 14,00 2.53 0.02 Subcatchment 1S: Basin A - Imp. 15.00 2.66 0.01 7 P. 16,00 2.76 0.01 Hydrograph 17.00 2.85 0.01 18,00 291 0.01 032: (Ci | 49.00 297 0.01 20.00 3.03 0.01 cm NOAA 24-hr D 21.00 3.08 0.0% A = i" (22.00 . 1.00 oa 2-Year Rainfall=3.44' 200 317 eo 026 = 24.00 3.24 0.00 be Runoff Area=4,655 sf 35.00 a1 6.00 oa: Runoff Volume=0.029 af 26.00 3.24 0.00 7 7 27.00 321 0.00 Boe Runoff Depth=3.21 28.00 3.21 0,00 010] 3 - 29.00 321 0.00 Ee Te=10.0 min 30.00 324 0.00 =! 31.00 3.21 0.00 sa CN=98 32.00 3.21 0.00 33.00 321 0.00 0 34.00 321 0.00 a 35.00 3.21 0.00 0.04: 36.00 3.21 0.00 002 37.00 3.21 0.00 38.00 3.21 0.00 39.00 3.21 0.00 OT CIO OH Ha 2283032 80 so aE Had 1050 S21 8802S OBS 7072 39.00 7 aed 41.00 3.21 0.00 42.00 321 0.00 43,00 3.21 0,00 44,00 3.21 0.00 45.00 3.21 0.00 46.00 3.21 0.00 47.00 3.21 0.00 48.00 3.21 0.00 49.00 3.21 0.00 50.00 3.21 0.00 51.00 321 0.00

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 11 40.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC P 4 Summary for Subcatchment 3S: Basin A - Perv. Hydrograph for Subcatchment 3S: Basin A - Perv. Runoff = 0.65¢fs@ 12.18hrs, Volume= 0.056 af, Depth= 1.20" Time Precip. Excess Runoff | Time Precip. Excess Runoff Routed to Pond 3P : Basin A cfs Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs ee ines oo ta Be NOAA 24-hr D 2-Year Rainfali=3.44" ze] iors foo so CS 0.00 .¢ . 5.00 3.44 1.20 0.00 a 4.00 0.18 0.00 56.00 344 1.20 0.00 Area (sf) CN Description. 5.00 0.24 0.00 87.00 344 1.20 0.00 24,500 74 >75% Grass cover, Good, HSG C 6.00 0.29 0.00 58.00 344 1:20 0.00 24,500 7100.00% Pervious Area 700 0.36 0.00 59.00 344 1.20 0.00 8.00 0.45 0.00 60.00 344 1.20 0.00 : i 9.00 0.55 0.00, 6100-344 1.20 0.00 eet a aba 1000 068 0.00 6200 344 120 0.00 = 11.00 0.89 0.01 63.00 3.44 1.20 0,00 10.9 Direct Entry, Direct 12.00 1.65 0.20 64.00 3.44 1.20 0.00 13.00 2.55 0.63 65.00 3.44 1.20 0.00 Subcatchment 3S: Basin A - Perv. 1400 2.78 076 66.00 344 1.20 0.00 15.00 2.89 0.84 67.00 3.44 1.20 0.00 Hydrograph 16.00 2.99 0.90 68.00 3.44 1.20 0.00 17,00 3.08 0.96 69,00 3.44 1.20 0.00 or: Gea} 1800 3.15 1.00 70.00 344 1.20 0.00 4900 320 1.04 71.00 344 1.20 0,00 pe NOAA .24-hr D 20.00 326 1.08 72.00 344 © 1.20 0.00 . 1 21.00 3.31 4.44 085 2-Year Rainfall=3.44' 2200 3361.14 . Runoff Area=24,500 sf eo bea tiae oat Runoff Volume=0.056 af 25.00 344 1.20 F oa " A 3.44 1.20 7 oS Runoff Depth=1.20' 2700 344 1.20 ” — i (28,00 3.44 1,20 © os Te=10:0-min 29.00 344 1.20 usd - CN=74 | 30.00 3.44 = 1.20 31.00 3.44 1.20 32.00 3.44 1.20 33.00 3.44 1.20 34.00 3.44 1.20 35.00 3.44 1.20 3600 3.44 4.20 37.00 344 1.20 38.00 344 1.20 39.00 3.44 1.20 40.00 3.44 1.20 41.00 3.44, 1,20 42.00 3.44 41,20 43,00 3.44 1.20 44.00 3.44 1.20 45.00 344 1.20 46.00 3.44 1,20 47.00 3.44, 1.20 48.00 3.44 1,20 49.00 3.44 1.20 50.00 344 1.20 51.00 3.44 1.20

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 Hj 4 Summary for Subcatchment 4S: Basin B - Imp. Runoff == 0.30 cfs @ 12.17 hrs, Volume= 0.029 af, Depth= 3.21" 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 2-Year Rainfall=3.44" Area(sf)_CN__Description 4,648 98 __Unconnected pavement, HSG C 4,648 100.00% Impervious Area 4,648 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) _(ftft)__(ftisec) (cfs) 10.0 Direct Entry, Direct Subcatchment 4S: Basin B - Imp. Hydrograph NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=4,648 sf Runoff Volume=0.029 af Runoff Depth=3.21" Te=10.0 min CN=98 28 6B WO 12 14 15 1820 22 24 28 2B 30°32 34 36 98 4042 48 46 48 90 52 54 98 £6.60 62 Gs 65.68 7072 “Time (hours) 2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Raintall=3.44" Prepared by Dynamic Engineering Printed 9/5/2022 roCAD® 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 14 Hydrograph for Subcatchment 4S: Basin B - Imp. Time Precip. Excess Runoff