Drainage Report

Basin 1 without exfiltration Proposed basin 1 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 42 Summary for Pond 29P: Basin 1 Inflow Area = 7.230 ac, Inflow Depth = 7.30" for 100-Year event Inflow = 29.62 cfs @ 12.41 hrs, Volume= 4.400 af Outflow = 2.09 cfs @ 15.28 hrs, Volume= 2.848 af, Atten= 93%, Lag= 172.1 min Primary = 2.09 cfs @ 15.28 hrs, Volume= 2.848 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 544.77' @ 15.28 hrs Surf.Area= 42,071 sf Storage= 136,068 cf Plug-Flow detention time= 699.4 min calculated for 2.848 af (65% of inflow) Center-of-Mass det. time= 584.0 min ( 1,370.7 - 786.7 ) Volume Invert Avail.Storage Storage Description #1 540.50' 191,393 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 540.50 21,047 0 0 542.00 29,152 37,649 37,649 544.00 38,188 67,340 104,989 546.00 48,216 86,404 191,393 Device Routing Invert Outlet Devices #1 Primary 542.90' 8.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.09 cfs @ 15.28 hrs HW=544.77' (Free Discharge) 1=Orifice/Grate (Orifice Controls 2.09 cfs @ 5.98 fps)

Basin 1 without exfiltration Proposed basin 1 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 43 Pond 29P: Basin 1 Hydrograph Inflow 29.62 cfs Primary 32 30 Inflow Area=7.230 ac 28 26 Peak Elev=544.77' 24 22 Storage=136,068 cf 20 Flow (cfs) 18 16 14 12 10 8 6 4 2.09 cfs 2 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)

Basin 1 without exfiltration Proposed basin 1 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 44 Hydrograph for Pond 29P: Basin 1 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 540.50 0.00 2.50 0.36 1,269 540.56 0.00 5.00 0.56 5,526 540.75 0.00 7.50 0.90 11,643 541.02 0.00 10.00 1.88 22,997 541.47 0.00 12.50 27.90 89,390 543.58 0.99 15.00 2.35 135,940 544.77 2.08 17.50 1.33 132,694 544.69 2.03 20.00 0.96 124,791 544.50 1.89 22.50 0.79 116,376 544.29 1.73 25.00 0.02 106,803 544.05 1.52 27.50 0.00 94,677 543.73 1.18 30.00 0.00 85,621 543.48 0.83 32.50 0.00 79,777 543.31 0.49 35.00 0.00 76,269 543.21 0.30 37.50 0.00 74,046 543.15 0.20 40.00 0.00 72,545 543.10 0.14 42.50 0.00 71,479 543.07 0.10 45.00 0.00 70,679 543.05 0.08 47.50 0.00 70,070 543.03 0.06 50.00 0.00 69,588 543.02 0.05 52.50 0.00 69,188 543.00 0.04 55.00 0.00 68,857 542.99 0.03 57.50 0.00 68,583 542.99 0.03 60.00 0.00 68,355 542.98 0.02 62.50 0.00 68,166 542.97 0.02 65.00 0.00 67,998 542.97 0.02 67.50 0.00 67,844 542.96 0.02 70.00 0.00 67,704 542.96 0.01

Basin 1 without exfiltration Proposed basin 1 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 45 Stage-Discharge for Pond 29P: Basin 1 Elevation Primary Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) 540.50 0.00 543.05 0.08 545.60 2.59 540.55 0.00 543.10 0.13 545.65 2.61 540.60 0.00 543.15 0.20 545.70 2.64 540.65 0.00 543.20 0.28 545.75 2.67 540.70 0.00 543.25 0.37 545.80 2.69 540.75 0.00 543.30 0.47 545.85 2.72 540.80 0.00 543.35 0.57 545.90 2.74 540.85 0.00 543.40 0.68 545.95 2.77 540.90 0.00 543.45 0.78 546.00 2.80 540.95 0.00 543.50 0.87 541.00 0.00 543.55 0.95 541.05 0.00 543.60 1.02 541.10 0.00 543.65 1.08 541.15 0.00 543.70 1.15 541.20 0.00 543.75 1.21 541.25 0.00 543.80 1.27 541.30 0.00 543.85 1.32 541.35 0.00 543.90 1.37 541.40 0.00 543.95 1.42 541.45 0.00 544.00 1.47 541.50 0.00 544.05 1.52 541.55 0.00 544.10 1.56 541.60 0.00 544.15 1.61 541.65 0.00 544.20 1.65 541.70 0.00 544.25 1.69 541.75 0.00 544.30 1.74 541.80 0.00 544.35 1.78 541.85 0.00 544.40 1.82 541.90 0.00 544.45 1.85 541.95 0.00 544.50 1.89 542.00 0.00 544.55 1.93 542.05 0.00 544.60 1.96 542.10 0.00 544.65 2.00 542.15 0.00 544.70 2.04 542.20 0.00 544.75 2.07 542.25 0.00 544.80 2.10 542.30 0.00

.10 0.00 544.65 2.00 542.15 0.00 544.70 2.04 542.20 0.00 544.75 2.07 542.25 0.00 544.80 2.10 542.30 0.00 544.85 2.14 542.35 0.00 544.90 2.17 542.40 0.00 544.95 2.20 542.45 0.00 545.00 2.23 542.50 0.00 545.05 2.27 542.55 0.00 545.10 2.30 542.60 0.00 545.15 2.33 542.65 0.00 545.20 2.36 542.70 0.00 545.25 2.39 542.75 0.00 545.30 2.42 542.80 0.00 545.35 2.45 542.85 0.00 545.40 2.47 542.90 0.00 545.45 2.50 542.95 0.01 545.50 2.53 543.00 0.04 545.55 2.56

Basin 1 without exfiltration Proposed basin 1 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 46 Stage-Area-Storage for Pond 29P: Basin 1 Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 540.50 21,047 0 545.60 46,210 172,508 540.60 21,587 2,132 545.70 46,712 177,154 540.70 22,128 4,317 545.80 47,213 181,850 540.80 22,668 6,557 545.90 47,715 186,597 540.90 23,208 8,851 546.00 48,216 191,393 541.00 23,749 11,199 541.10 24,289 13,601 541.20 24,829 16,057 541.30 25,370 18,567 541.40 25,910 21,131 541.50 26,450 23,749 541.60 26,991 26,421 541.70 27,531 29,147 541.80 28,071 31,927 541.90 28,612 34,761 542.00 29,152 37,649 542.10 29,604 40,587 542.20 30,056 43,570 542.30 30,507 46,598 542.40 30,959 49,671 542.50 31,411 52,790 542.60 31,863 55,954 542.70 32,315 59,163 542.80 32,766 62,417 542.90 33,218 65,716 543.00 33,670 69,060 543.10 34,122 72,450 543.20 34,574 75,885 543.30 35,025 79,365 543.40 35,477 82,890 543.50 35,929 86,460 543.60 36,381 90,075 543.70 36,833 93,736 543.80 37,284 97,442 543.90 37,736 101,193 544.00 38,188 104,989 544.10 38,689 108,833 544.20 39,191 112,727 544.30 39,692 116,671 544.40 40,194 120,666 544.50 40,695 124,710 544.60

38,689 108,833 544.20 39,191 112,727 544.30 39,692 116,671 544.40 40,194 120,666 544.50 40,695 124,710 544.60 41,196 128,805 544.70 41,698 132,949 544.80 42,199 137,144 544.90 42,701 141,389 545.00 43,202 145,684 545.10 43,703 150,030 545.20 44,205 154,425 545.30 44,706 158,870 545.40 45,208 163,366 545.50 45,709 167,912

33S 34S All basin's 2 undetained Pre-dev basin 2 All 40S 41P Basin 2-1 Pond 2-1 Subcat Reach Pond Link Routing Diagram for Proposed Basin 2-1 R5 Prepared by Anderson Consulting Services, Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC

Basin 2-1 Proposed Basin 2-1 R5 Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 2 Project Notes Rainfall events imported from "NRCS-Rain.txt" for 6606 NJ Essex-D

Basin 2-1 Proposed Basin 2-1 R5 Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 3 Rainfall Events Listing (selected events) Event# Event Storm Type Curve Mode Duration B/B Depth AMC Name (hours) (inches) 1 2-Year NOAA 24-hr D Default 24.00 1 3.44 2 2 10-Year NOAA 24-hr D Default 24.00 1 5.22 2 3 100-Year NOAA 24-hr D Default 24.00 1 8.66 2