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2023-12-06 Appendix C Proposed HydroCAD ReportOverflow at grade Filtration Through BioSection Overflow at grade Filtration Through BioSection PR PR1 Basin 1 PR10 Basin 10 PR11 Basin 11 PR12 West site to Area Drain PR13 Pavers front PR14 Pavers North PR15a Roof West PR15b Roof East PR16 Remainder of site PR17 Pavers path PR2 Basin 2 PR3 Basin 3 PR4 Basin 4 PR5 Basin 5 PR6 Basin 6 PR7 Basin 7 PR8 Basin 8 PR9 Basin 9 DP-PR Proposed Site P1 4" Pipe Under Path P2 8" Pipe P3 4" Outlet Pipe 1 Surface 1 1S Subsurface 1 2 Surface 2 2S Subsurface 2 3 Surface 3 3S Subsurface 3 4 Surface 4 4S Subsurface 4 5 Surface 5 5S Subsurface 5 6 Surface 6 6S Subsurface 6 7 Surface 7 7S Subsurface 7 8 Surface 8 8S Subsurface 8 9 Surface 9 9S Subsurface 9 10 Surface 10 10S Subsurface 10 11 Surface 11 11S Subsurface 11 29P Landscape Filter 30P Porous Pavers 31PCB Distribution Pipes 33PCB Distribution Pipes PN Porous Pavers PS Porous Pavers 33L On-site Closed Drainage Routing Diagram for 15150_HydroCAD Prepared by Nitsch Engineering, Printed 12/6/2023 HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Subcat Reach Pond Link 15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 2HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Rainfall Events Listing (selected events) Event# Event Name Storm Type Curve Mode Duration (hours) B/B Depth (inches) AMC 1 2-YR NOAA 24-hr D Default 24.00 1 3.08 2 2 10-YR NOAA 24-hr D Default 24.00 1 4.94 2 3 25-YR NOAA 24-hr D Default 24.00 1 6.10 2 4 100-YR NOAA 24-hr D Default 24.00 1 7.89 2 15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 3HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Area Listing (selected nodes) Area (sq-ft) CN Description (subcatchment-numbers) 25,378 80 >75% Grass cover, Good, HSG D (PR1, PR10, PR11, PR12, PR13, PR14, PR16, PR17, PR2, PR3, PR4, PR5, PR6, PR7, PR8, PR9) 1,320 98 Impervious (PR4, PR9) 398 98 Permeable Pavers (PR13, PR17) 464 98 Porous Pavers (PR14) 5,639 98 Roof (PR15a, PR15b) 8,130 98 Site Impervious (PR1, PR10, PR11, PR12, PR13, PR14, PR16, PR3, PR5, PR6, PR7, PR8) 41,329 87 TOTAL AREA 15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 4HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Soil Listing (selected nodes) Area (sq-ft) Soil Group Subcatchment Numbers 0 HSG A 0 HSG B 0 HSG C 25,378 HSG D PR1, PR10, PR11, PR12, PR13, PR14, PR16, PR17, PR2, PR3, PR4, PR5, PR6, PR7, PR8, PR9 15,951 Other PR1, PR10, PR11, PR12, PR13, PR14, PR15a, PR15b, PR16, PR17, PR3, PR4, PR5, PR6, PR7, PR8, PR9 41,329 TOTAL AREA 15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 5HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Ground Covers (selected nodes) HSG-A (sq-ft) HSG-B (sq-ft) HSG-C (sq-ft) HSG-D (sq-ft) Other (sq-ft) Total (sq-ft) Ground Cover Subcatchment Numbers 0 0 0 25,378 0 25,378 >75% Grass cover, Good 0 0 0 0 1,320 1,320 Impervious 0 0 0 0 398 398 Permeable Pavers 0 0 0 0 464 464 Porous Pavers 0 0 0 0 5,639 5,639 Roof 0 0 0 0 8,130 8,130 Site Impervious 0 0 0 25,378 15,951 41,329 TOTAL AREA 15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 6HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pipe Listing (selected nodes) Line# Node Number In-Invert (feet) Out-Invert (feet) Length (feet) Slope (ft/ft) n Width (inches) Diam/Height (inches) Inside-Fill (inches) 1 P1 177.18 176.18 15.0 0.0667 0.013 0.0 6.0 0.0 2 P2 174.50 173.66 65.0 0.0129 0.013 0.0 8.0 0.0 3 P3 183.17 173.00 136.0 0.0748 0.013 0.0 6.0 0.0 4 PN 188.43 186.00 7.0 0.3471 0.013 0.0 4.0 0.0 NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 7HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Time span=0.00-100.00 hrs, dt=0.01 hrs, 10001 points x 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=1,918 sf 33.52% Impervious Runoff Depth=1.73"Subcatchment PR1: Basin 1 Tc=6.0 min CN=86 Runoff=0.09 cfs 277 cf Runoff Area=3,386 sf 9.57% Impervious Runoff Depth=1.44"Subcatchment PR10: Basin 10 Tc=6.0 min CN=82 Runoff=0.13 cfs 407 cf Runoff Area=2,204 sf 27.72% Impervious Runoff Depth=1.66"Subcatchment PR11: Basin 11 Tc=6.0 min CN=85 Runoff=0.10 cfs 304 cf Runoff Area=2,493 sf 1.36% Impervious Runoff Depth=1.31"Subcatchment PR12: West site to Area Drain Tc=6.0 min CN=80 Runoff=0.09 cfs 272 cf Runoff Area=2,379 sf 11.60% Impervious Runoff Depth=1.44"Subcatchment PR13: Pavers front Tc=674.0 min CN=82 Runoff=0.01 cfs 286 cf Runoff Area=676 sf 77.51% Impervious Runoff Depth=2.43"Subcatchment PR14: Pavers North Tc=674.0 min CN=94 Runoff=0.00 cfs 137 cf Runoff Area=2,750 sf 100.00% Impervious Runoff Depth=2.85"Subcatchment PR15a: Roof West Tc=6.0 min CN=98 Runoff=0.18 cfs 653 cf Runoff Area=2,889 sf 100.00% Impervious Runoff Depth=2.85"Subcatchment PR15b: Roof East Tc=6.0 min CN=98 Runoff=0.19 cfs 686 cf Runoff Area=13,694 sf 44.87% Impervious Runoff Depth=1.89"Subcatchment PR16: Remainder of site Tc=6.0 min CN=88 Runoff=0.69 cfs 2,156 cf Runoff Area=443 sf 33.86% Impervious Runoff Depth=1.73"Subcatchment PR17: Pavers path Tc=674.0 min CN=86 Runoff=0.00 cfs 64 cf Runoff Area=164 sf 0.00% Impervious Runoff Depth=1.31"Subcatchment PR2: Basin 2 Tc=6.0 min CN=80 Runoff=0.01 cfs 18 cf Runoff Area=437 sf 3.20% Impervious Runoff Depth=1.38"Subcatchment PR3: Basin 3 Tc=6.0 min CN=81 Runoff=0.02 cfs 50 cf Runoff Area=2,525 sf 10.02% Impervious Runoff Depth=1.44"Subcatchment PR4: Basin 4 Tc=6.0 min CN=82 Runoff=0.10 cfs 303 cf Runoff Area=172 sf 18.02% Impervious Runoff Depth=1.51"Subcatchment PR5: Basin 5 Tc=6.0 min CN=83 Runoff=0.01 cfs 22 cf Runoff Area=188 sf 30.32% Impervious Runoff Depth=1.66"Subcatchment PR6: Basin 6 Tc=6.0 min CN=85 Runoff=0.01 cfs 26 cf Runoff Area=458 sf 26.20% Impervious Runoff Depth=1.66"Subcatchment PR7: Basin 7 Tc=6.0 min CN=85 Runoff=0.02 cfs 63 cf NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 8HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Runoff Area=630 sf 10.16% Impervious Runoff Depth=1.44"Subcatchment PR8: Basin 8 Tc=6.0 min CN=82 Runoff=0.02 cfs 76 cf Runoff Area=3,923 sf 27.20% Impervious Runoff Depth=1.66"Subcatchment PR9: Basin 9 Tc=6.0 min CN=85 Runoff=0.18 cfs 541 cf Inflow=1.55 cfs 6,327 cfReach DP-PR: Proposed Site Outflow=1.55 cfs 6,327 cf Avg. Flow Depth=0.09' Max Vel=4.28 fps Inflow=0.10 cfs 344 cfReach P1: 4" Pipe Under Path 6.0" Round Pipe n=0.013 L=15.0' S=0.0667 '/' Capacity=1.45 cfs Outflow=0.10 cfs 344 cf Avg. Flow Depth=0.14' Max Vel=2.44 fps Inflow=0.12 cfs 832 cfReach P2: 8" Pipe 8.0" Round Pipe n=0.013 L=65.0' S=0.0129 '/' Capacity=1.37 cfs Outflow=0.12 cfs 832 cf Avg. Flow Depth=0.08' Max Vel=4.22 fps Inflow=0.09 cfs 439 cfReach P3: 4" Outlet Pipe 6.0" Round Pipe n=0.013 L=136.0' S=0.0748 '/' Capacity=1.53 cfs Outflow=0.09 cfs 439 cf Peak Elev=183.22' Storage=10 cf Inflow=0.09 cfs 277 cfPond 1: Surface 1 Primary=0.08 cfs 183 cf Secondary=0.00 cfs 94 cf Outflow=0.09 cfs 277 cf Peak Elev=178.20' Storage=1 cf Inflow=0.00 cfs 94 cfPond 1S: Subsurface 1 Outflow=0.00 cfs 93 cf Peak Elev=182.72' Storage=14 cf Inflow=0.09 cfs 201 cfPond 2: Surface 2 Primary=0.08 cfs 137 cf Secondary=0.00 cfs 64 cf Outflow=0.09 cfs 201 cf Peak Elev=177.72' Storage=1 cf Inflow=0.01 cfs 157 cfPond 2S: Subsurface 2 Outflow=0.01 cfs 157 cf Peak Elev=181.84' Storage=12 cf Inflow=0.10 cfs 187 cfPond 3: Surface 3 Primary=0.09 cfs 118 cf Secondary=0.00 cfs 70 cf Outflow=0.10 cfs 187 cf Peak Elev=177.28' Storage=3 cf Inflow=0.01 cfs 227 cfPond 3S: Subsurface 3 Outflow=0.01 cfs 226 cf Peak Elev=183.17' Storage=54 cf Inflow=0.10 cfs 303 cfPond 4: Surface 4 Primary=0.06 cfs 70 cf Secondary=0.01 cfs 233 cf Outflow=0.07 cfs 303 cf Peak Elev=178.25' Storage=8 cf Inflow=0.01 cfs 233 cfPond 4S: Subsurface 4 Outflow=0.01 cfs 232 cf Peak Elev=182.66' Storage=16 cf Inflow=0.06 cfs 92 cfPond 5: Surface 5 Primary=0.05 cfs 56 cf Secondary=0.00 cfs 36 cf Outflow=0.06 cfs 92 cf Peak Elev=177.77' Storage=3 cf Inflow=0.02 cfs 268 cfPond 5S: Subsurface 5 Outflow=0.02 cfs 268 cf Peak Elev=182.14' Storage=17 cf Inflow=0.06 cfs 82 cfPond 6: Surface 6 Primary=0.04 cfs 44 cf Secondary=0.00 cfs 38 cf Outflow=0.05 cfs 82 cf NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 9HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Peak Elev=177.28' Storage=3 cf Inflow=0.02 cfs 306 cfPond 6S: Subsurface 6 Outflow=0.02 cfs 306 cf Peak Elev=181.12' Storage=31 cf Inflow=0.05 cfs 107 cfPond 7: Surface 7 Primary=0.03 cfs 32 cf Secondary=0.01 cfs 75 cf Outflow=0.04 cfs 107 cf Peak Elev=176.43' Storage=13 cf Inflow=0.12 cfs 725 cfPond 7S: Subsurface 7 Outflow=0.12 cfs 724 cf Peak Elev=179.80' Storage=41 cf Inflow=0.04 cfs 108 cfPond 8: Surface 8 Primary=0.00 cfs 0 cf Secondary=0.01 cfs 108 cf Outflow=0.01 cfs 108 cf Peak Elev=174.94' Storage=14 cf Inflow=0.13 cfs 832 cfPond 8S: Subsurface 8 Outflow=0.12 cfs 832 cf Peak Elev=174.32' Storage=9 cf Inflow=0.18 cfs 541 cfPond 9: Surface 9 Primary=0.17 cfs 340 cf Secondary=0.01 cfs 201 cf Outflow=0.18 cfs 541 cf Peak Elev=170.72' Storage=9 cf Inflow=0.01 cfs 201 cfPond 9S: Subsurface 9 Outflow=0.00 cfs 200 cf Peak Elev=173.30' Storage=27 cf Inflow=0.13 cfs 407 cfPond 10: Surface 10 Primary=0.12 cfs 143 cf Secondary=0.01 cfs 264 cf Outflow=0.13 cfs 407 cf Peak Elev=168.74' Storage=6 cf Inflow=0.01 cfs 264 cfPond 10S: Subsurface 10 Outflow=0.01 cfs 264 cf Peak Elev=185.34' Storage=48 cf Inflow=0.10 cfs 439 cfPond 11: Surface 11 Primary=0.09 cfs 76 cf Secondary=0.01 cfs 363 cf Outflow=0.10 cfs 439 cf Peak Elev=183.26' Storage=11 cf Inflow=0.01 cfs 363 cfPond 11S: Subsurface 11 Outflow=0.01 cfs 363 cf Peak Elev=170.87' Storage=146 cf Inflow=0.37 cfs 1,338 cfPond 29P: Landscape Filter Outflow=0.30 cfs 1,333 cf Peak Elev=174.95' Storage=2 cf Inflow=0.00 cfs 64 cfPond 30P: Porous Pavers Outflow=0.00 cfs 63 cf Peak Elev=173.72' Inflow=0.18 cfs 653 cfPond 31P: Distribution Pipes Primary=0.18 cfs 652 cf Secondary=0.00 cfs 0 cf Outflow=0.18 cfs 653 cf Peak Elev=173.74' Inflow=0.19 cfs 686 cfPond 33P: Distribution Pipes Primary=0.19 cfs 685 cf Secondary=0.00 cfs 1 cf Outflow=0.19 cfs 686 cf Peak Elev=188.47' Storage=8 cf Inflow=0.00 cfs 137 cfPond PN: Porous Pavers 4.0" Round Culvert n=0.013 L=7.0' S=0.3471 '/' Outflow=0.00 cfs 135 cf Peak Elev=174.98' Storage=5 cf Inflow=0.01 cfs 286 cfPond PS: Porous Pavers Outflow=0.01 cfs 285 cf NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 10HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Inflow=0.87 cfs 4,171 cfLink 33L: On-site Closed Drainage Primary=0.87 cfs 4,171 cf Total Runoff Area = 41,329 sf Runoff Volume = 6,340 cf Average Runoff Depth = 1.84" 61.40% Pervious = 25,378 sf 38.60% Impervious = 15,951 sf NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 11HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR1: Basin 1 Runoff = 0.09 cfs @ 12.13 hrs, Volume= 277 cf, Depth= 1.73" Routed to Pond 1 : Surface 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 643 98 Site Impervious 1,275 80 >75% Grass cover, Good, HSG D 1,918 86 Weighted Average 1,275 66.48% Pervious Area 643 33.52% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR1: Basin 1 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=1,918 sf Runoff Volume=277 cf Runoff Depth=1.73" Tc=6.0 min CN=86 0.09 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 12HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR10: Basin 10 Runoff = 0.13 cfs @ 12.13 hrs, Volume= 407 cf, Depth= 1.44" Routed to Pond 10 : Surface 10 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 324 98 Site Impervious 3,062 80 >75% Grass cover, Good, HSG D 3,386 82 Weighted Average 3,062 90.43% Pervious Area 324 9.57% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR10: Basin 10 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=3,386 sf Runoff Volume=407 cf Runoff Depth=1.44" Tc=6.0 min CN=82 0.13 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 13HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR11: Basin 11 Runoff = 0.10 cfs @ 12.13 hrs, Volume= 304 cf, Depth= 1.66" Routed to Pond 11 : Surface 11 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 611 98 Site Impervious 1,593 80 >75% Grass cover, Good, HSG D 2,204 85 Weighted Average 1,593 72.28% Pervious Area 611 27.72% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR11: Basin 11 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.11 0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=2,204 sf Runoff Volume=304 cf Runoff Depth=1.66" Tc=6.0 min CN=85 0.10 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 14HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR12: West site to Area Drain Runoff = 0.09 cfs @ 12.13 hrs, Volume= 272 cf, Depth= 1.31" Routed to Link 33L : On-site Closed Drainage Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 34 98 Site Impervious 2,459 80 >75% Grass cover, Good, HSG D 2,493 80 Weighted Average 2,459 98.64% Pervious Area 34 1.36% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR12: West site to Area Drain Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=2,493 sf Runoff Volume=272 cf Runoff Depth=1.31" Tc=6.0 min CN=80 0.09 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 15HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR13: Pavers front Runoff = 0.01 cfs @ 21.72 hrs, Volume= 286 cf, Depth= 1.44" Routed to Pond PS : Porous Pavers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 28 98 Site Impervious * 248 98 Permeable Pavers 2,103 80 >75% Grass cover, Good, HSG D 2,379 82 Weighted Average 2,103 88.40% Pervious Area 276 11.60% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 674.0 Direct Entry, Paver Tc Subcatchment PR13: Pavers front Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.007 0.007 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=2,379 sf Runoff Volume=286 cf Runoff Depth=1.44" Tc=674.0 min CN=82 0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 16HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR14: Pavers North Runoff = 0.00 cfs @ 20.97 hrs, Volume= 137 cf, Depth= 2.43" Routed to Pond PN : Porous Pavers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 60 98 Site Impervious * 464 98 Porous Pavers 152 80 >75% Grass cover, Good, HSG D 676 94 Weighted Average 152 22.49% Pervious Area 524 77.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 674.0 Direct Entry, Pavers Tc Subcatchment PR14: Pavers North Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.003 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=676 sf Runoff Volume=137 cf Runoff Depth=2.43" Tc=674.0 min CN=94 0.00 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 17HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR15a: Roof West Runoff = 0.18 cfs @ 12.13 hrs, Volume= 653 cf, Depth= 2.85" Routed to Pond 31P : Distribution Pipes Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 2,750 98 Roof 2,750 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR15a: Roof West Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=2,750 sf Runoff Volume=653 cf Runoff Depth=2.85" Tc=6.0 min CN=98 0.18 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 18HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR15b: Roof East Runoff = 0.19 cfs @ 12.13 hrs, Volume= 686 cf, Depth= 2.85" Routed to Pond 33P : Distribution Pipes Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 2,889 98 Roof 2,889 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR15b: Roof East Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=2,889 sf Runoff Volume=686 cf Runoff Depth=2.85" Tc=6.0 min CN=98 0.19 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 19HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR16: Remainder of site Runoff = 0.69 cfs @ 12.13 hrs, Volume= 2,156 cf, Depth= 1.89" Routed to Reach DP-PR : Proposed Site Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 6,144 98 Site Impervious 7,550 80 >75% Grass cover, Good, HSG D 13,694 88 Weighted Average 7,550 55.13% Pervious Area 6,144 44.87% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR16: Remainder of site Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=13,694 sf Runoff Volume=2,156 cf Runoff Depth=1.89" Tc=6.0 min CN=88 0.69 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 20HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR17: Pavers path Runoff = 0.00 cfs @ 21.71 hrs, Volume= 64 cf, Depth= 1.73" Routed to Pond 30P : Porous Pavers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 150 98 Permeable Pavers 293 80 >75% Grass cover, Good, HSG D 443 86 Weighted Average 293 66.14% Pervious Area 150 33.86% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 674.0 Direct Entry, Paver Tc Subcatchment PR17: Pavers path Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.002 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=443 sf Runoff Volume=64 cf Runoff Depth=1.73" Tc=674.0 min CN=86 0.00 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 21HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR2: Basin 2 Runoff = 0.01 cfs @ 12.13 hrs, Volume= 18 cf, Depth= 1.31" Routed to Pond 2 : Surface 2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description 164 80 >75% Grass cover, Good, HSG D 164 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR2: Basin 2 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=164 sf Runoff Volume=18 cf Runoff Depth=1.31" Tc=6.0 min CN=80 0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 22HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR3: Basin 3 Runoff = 0.02 cfs @ 12.13 hrs, Volume= 50 cf, Depth= 1.38" Routed to Pond 3 : Surface 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 14 98 Site Impervious 423 80 >75% Grass cover, Good, HSG D 437 81 Weighted Average 423 96.80% Pervious Area 14 3.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR3: Basin 3 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=437 sf Runoff Volume=50 cf Runoff Depth=1.38" Tc=6.0 min CN=81 0.02 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 23HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR4: Basin 4 Runoff = 0.10 cfs @ 12.13 hrs, Volume= 303 cf, Depth= 1.44" Routed to Pond 4 : Surface 4 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 253 98 Impervious 2,272 80 >75% Grass cover, Good, HSG D 2,525 82 Weighted Average 2,272 89.98% Pervious Area 253 10.02% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR4: Basin 4 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.11 0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=2,525 sf Runoff Volume=303 cf Runoff Depth=1.44" Tc=6.0 min CN=82 0.10 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 24HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR5: Basin 5 Runoff = 0.01 cfs @ 12.13 hrs, Volume= 22 cf, Depth= 1.51" Routed to Pond 5 : Surface 5 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 31 98 Site Impervious 141 80 >75% Grass cover, Good, HSG D 172 83 Weighted Average 141 81.98% Pervious Area 31 18.02% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR5: Basin 5 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=172 sf Runoff Volume=22 cf Runoff Depth=1.51" Tc=6.0 min CN=83 0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 25HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR6: Basin 6 Runoff = 0.01 cfs @ 12.13 hrs, Volume= 26 cf, Depth= 1.66" Routed to Pond 6 : Surface 6 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 57 98 Site Impervious 131 80 >75% Grass cover, Good, HSG D 188 85 Weighted Average 131 69.68% Pervious Area 57 30.32% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR6: Basin 6 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.009 0.009 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=188 sf Runoff Volume=26 cf Runoff Depth=1.66" Tc=6.0 min CN=85 0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 26HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR7: Basin 7 Runoff = 0.02 cfs @ 12.13 hrs, Volume= 63 cf, Depth= 1.66" Routed to Pond 7 : Surface 7 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 120 98 Site Impervious 338 80 >75% Grass cover, Good, HSG D 458 85 Weighted Average 338 73.80% Pervious Area 120 26.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR7: Basin 7 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.022 0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=458 sf Runoff Volume=63 cf Runoff Depth=1.66" Tc=6.0 min CN=85 0.02 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 27HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR8: Basin 8 Runoff = 0.02 cfs @ 12.13 hrs, Volume= 76 cf, Depth= 1.44" Routed to Pond 8 : Surface 8 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 64 98 Site Impervious 566 80 >75% Grass cover, Good, HSG D 630 82 Weighted Average 566 89.84% Pervious Area 64 10.16% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR8: Basin 8 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=630 sf Runoff Volume=76 cf Runoff Depth=1.44" Tc=6.0 min CN=82 0.02 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 28HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR9: Basin 9 Runoff = 0.18 cfs @ 12.13 hrs, Volume= 541 cf, Depth= 1.66" Routed to Pond 9 : Surface 9 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-YR Rainfall=3.08" Area (sf) CN Description * 1,067 98 Impervious 2,856 80 >75% Grass cover, Good, HSG D 3,923 85 Weighted Average 2,856 72.80% Pervious Area 1,067 27.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR9: Basin 9 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 NOAA 24-hr D 2-YR Rainfall=3.08" Runoff Area=3,923 sf Runoff Volume=541 cf Runoff Depth=1.66" Tc=6.0 min CN=85 0.18 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 29HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach DP-PR: Proposed Site [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 41,329 sf, 38.60% Impervious, Inflow Depth = 1.84" for 2-YR event Inflow = 1.55 cfs @ 12.14 hrs, Volume= 6,327 cf Outflow = 1.55 cfs @ 12.14 hrs, Volume= 6,327 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Reach DP-PR: Proposed Site Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)1 0 Inflow Area=41,329 sf 1.55 cfs1.55 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 30HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach P1: 4" Pipe Under Path [52] Hint: Inlet/Outlet conditions not evaluated Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 1.64" for 2-YR event Inflow = 0.10 cfs @ 12.17 hrs, Volume= 344 cf Outflow = 0.10 cfs @ 12.17 hrs, Volume= 344 cf, Atten= 0%, Lag= 0.0 min Routed to Pond 7S : Subsurface 7 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Max. Velocity= 4.28 fps, Min. Travel Time= 0.1 min Avg. Velocity = 1.52 fps, Avg. Travel Time= 0.2 min Peak Storage= 0 cf @ 12.17 hrs Average Depth at Peak Storage= 0.09' , Surface Width= 0.39' Bank-Full Depth= 0.50' Flow Area= 0.2 sf, Capacity= 1.45 cfs 6.0" Round Pipe n= 0.013 Corrugated PE, smooth interior Length= 15.0' Slope= 0.0667 '/' Inlet Invert= 177.18', Outlet Invert= 176.18' NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 31HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Reach P1: 4" Pipe Under Path Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.115 0.11 0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=2,519 sf Avg. Flow Depth=0.09' Max Vel=4.28 fps 6.0" Round Pipe n=0.013 L=15.0' S=0.0667 '/' Capacity=1.45 cfs 0.10 cfs0.10 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 32HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach P2: 8" Pipe [52] Hint: Inlet/Outlet conditions not evaluated Inflow Area = 6,492 sf, 18.21% Impervious, Inflow Depth = 1.54" for 2-YR event Inflow = 0.12 cfs @ 12.21 hrs, Volume= 832 cf Outflow = 0.12 cfs @ 12.22 hrs, Volume= 832 cf, Atten= 0%, Lag= 0.3 min Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Max. Velocity= 2.44 fps, Min. Travel Time= 0.4 min Avg. Velocity = 0.98 fps, Avg. Travel Time= 1.1 min Peak Storage= 3 cf @ 12.22 hrs Average Depth at Peak Storage= 0.14' , Surface Width= 0.54' Bank-Full Depth= 0.67' Flow Area= 0.3 sf, Capacity= 1.37 cfs 8.0" Round Pipe n= 0.013 Corrugated PE, smooth interior Length= 65.0' Slope= 0.0129 '/' Inlet Invert= 174.50', Outlet Invert= 173.66' NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 33HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Reach P2: 8" Pipe Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=6,492 sf Avg. Flow Depth=0.14' Max Vel=2.44 fps 8.0" Round Pipe n=0.013 L=65.0' S=0.0129 '/' Capacity=1.37 cfs 0.12 cfs0.12 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 34HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach P3: 4" Outlet Pipe [52] Hint: Inlet/Outlet conditions not evaluated [80] Warning: Exceeded Pond 11S by 0.01' @ 12.11 hrs (0.01 cfs 2 cf) Inflow Area = 2,880 sf, 39.41% Impervious, Inflow Depth = 1.83" for 2-YR event Inflow = 0.09 cfs @ 12.14 hrs, Volume= 439 cf Outflow = 0.09 cfs @ 12.15 hrs, Volume= 439 cf, Atten= 0%, Lag= 0.4 min Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Max. Velocity= 4.22 fps, Min. Travel Time= 0.5 min Avg. Velocity = 1.32 fps, Avg. Travel Time= 1.7 min Peak Storage= 3 cf @ 12.15 hrs Average Depth at Peak Storage= 0.08' , Surface Width= 0.37' Bank-Full Depth= 0.50' Flow Area= 0.2 sf, Capacity= 1.53 cfs 6.0" Round Pipe n= 0.013 Corrugated PE, smooth interior Length= 136.0' Slope= 0.0748 '/' Inlet Invert= 183.17', Outlet Invert= 173.00' NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 35HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Reach P3: 4" Outlet Pipe Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=2,880 sf Avg. Flow Depth=0.08' Max Vel=4.22 fps 6.0" Round Pipe n=0.013 L=136.0' S=0.0748 '/' Capacity=1.53 cfs 0.09 cfs0.09 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 36HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1: Surface 1 Inflow Area = 1,918 sf, 33.52% Impervious, Inflow Depth = 1.73" for 2-YR event Inflow = 0.09 cfs @ 12.13 hrs, Volume= 277 cf Outflow = 0.09 cfs @ 12.15 hrs, Volume= 277 cf, Atten= 2%, Lag= 0.8 min Primary = 0.08 cfs @ 12.15 hrs, Volume= 183 cf Routed to Pond 2 : Surface 2 Secondary = 0.00 cfs @ 12.15 hrs, Volume= 94 cf Routed to Pond 1S : Subsurface 1 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 183.22' @ 12.15 hrs Surf.Area= 34 sf Storage= 10 cf Plug-Flow detention time= 15.9 min calculated for 277 cf (100% of inflow) Center-of-Mass det. time= 15.9 min ( 849.4 - 833.5 ) Volume Invert Avail.Storage Storage Description #1 182.50' 23 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.50 2 0 0 183.00 17 5 5 183.51 55 18 23 Device Routing Invert Outlet Devices #1 Secondary 182.50'4.000 in/hr Exfiltration over Surface area #2 Primary 183.50'8.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 183.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 183.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.08 cfs @ 12.15 hrs HW=183.22' TW=182.72' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.08 cfs @ 1.51 fps) 4=Orifice/Grate ( Controls 0.00 cfs) Secondary OutFlow Max=0.00 cfs @ 12.15 hrs HW=183.22' TW=178.20' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.00 cfs) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 37HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 1: Surface 1 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=1,918 sf Peak Elev=183.22' Storage=10 cf 0.09 cfs0.09 cfs 0.08 cfs 0.00 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 38HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1S: Subsurface 1 Inflow = 0.00 cfs @ 12.15 hrs, Volume= 94 cf Outflow = 0.00 cfs @ 12.17 hrs, Volume= 93 cf, Atten= 3%, Lag= 1.7 min Primary = 0.00 cfs @ 12.17 hrs, Volume= 93 cf Routed to Pond 2S : Subsurface 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 178.20' @ 12.17 hrs Surf.Area= 52 sf Storage= 1 cf Plug-Flow detention time= 8.4 min calculated for 93 cf (100% of inflow) Center-of-Mass det. time= 7.1 min ( 1,014.1 - 1,007.0 ) Volume Invert Avail.Storage Storage Description #1 178.16' 48 cf Custom Stage Data (Prismatic) Listed below (Recalc) 122 cf Overall - 1 cf Embedded = 121 cf x 40.0% Voids #2 178.17' 1 cf 4.0" Round Pipe Storage Inside #1 L= 11.8' 49 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 178.16 52 0 0 180.50 52 122 122 Device Routing Invert Outlet Devices #1 Primary 178.17'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.00 cfs @ 12.17 hrs HW=178.20' TW=177.72' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.00 cfs @ 0.63 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 39HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 1S: Subsurface 1 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.003 0.003 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Peak Elev=178.20' Storage=1 cf 0.00 cfs0.00 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 40HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2: Surface 2 Inflow Area = 2,082 sf, 30.88% Impervious, Inflow Depth = 1.16" for 2-YR event Inflow = 0.09 cfs @ 12.15 hrs, Volume= 201 cf Outflow = 0.09 cfs @ 12.16 hrs, Volume= 201 cf, Atten= 3%, Lag= 1.0 min Primary = 0.08 cfs @ 12.16 hrs, Volume= 137 cf Routed to Pond 3 : Surface 3 Secondary = 0.00 cfs @ 12.16 hrs, Volume= 64 cf Routed to Pond 2S : Subsurface 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 182.72' @ 12.16 hrs Surf.Area= 40 sf Storage= 14 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 13.4 min ( 790.2 - 776.8 ) Volume Invert Avail.Storage Storage Description #1 182.00' 28 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.00 2 0 0 182.50 25 7 7 183.01 60 22 28 Device Routing Invert Outlet Devices #1 Secondary 182.00'4.000 in/hr Exfiltration over Surface area #2 Primary 183.00'8.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 182.50'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 182.75'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.08 cfs @ 12.16 hrs HW=182.72' TW=181.84' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.08 cfs @ 1.51 fps) 4=Orifice/Grate ( Controls 0.00 cfs) Secondary OutFlow Max=0.00 cfs @ 12.16 hrs HW=182.72' TW=177.72' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.00 cfs) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 41HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 2: Surface 2 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=2,082 sf Peak Elev=182.72' Storage=14 cf 0.09 cfs 0.09 cfs 0.08 cfs 0.00 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 42HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2S: Subsurface 2 Inflow = 0.01 cfs @ 12.17 hrs, Volume= 157 cf Outflow = 0.01 cfs @ 12.19 hrs, Volume= 157 cf, Atten= 1%, Lag= 1.4 min Primary = 0.01 cfs @ 12.19 hrs, Volume= 157 cf Routed to Pond 3S : Subsurface 3 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.72' @ 12.19 hrs Surf.Area= 57 sf Storage= 1 cf Plug-Flow detention time= 6.5 min calculated for 157 cf (100% of inflow) Center-of-Mass det. time= 5.5 min ( 968.8 - 963.3 ) Volume Invert Avail.Storage Storage Description #1 177.66' 53 cf Custom Stage Data (Prismatic) Listed below (Recalc) 133 cf Overall - 1 cf Embedded = 133 cf x 40.0% Voids #2 177.67' 1 cf 4.0" Round Pipe Storage Inside #1 L= 10.0' 54 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.66 57 0 0 180.00 57 133 133 Device Routing Invert Outlet Devices #1 Primary 177.67'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.19 hrs HW=177.72' TW=177.28' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.77 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 43HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 2S: Subsurface 2 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Peak Elev=177.72' Storage=1 cf 0.01 cfs0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 44HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 3: Surface 3 [87] Warning: Oscillations may require smaller dt or Finer Routing (severity=423) Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 0.89" for 2-YR event Inflow = 0.10 cfs @ 12.16 hrs, Volume= 187 cf Outflow = 0.10 cfs @ 12.16 hrs, Volume= 187 cf, Atten= 0%, Lag= 0.4 min Primary = 0.09 cfs @ 12.16 hrs, Volume= 118 cf Routed to Reach P1 : 4" Pipe Under Path Secondary = 0.00 cfs @ 12.16 hrs, Volume= 70 cf Routed to Pond 3S : Subsurface 3 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 181.84' @ 12.16 hrs Surf.Area= 53 sf Storage= 12 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 8.9 min ( 781.8 - 772.9 ) Volume Invert Avail.Storage Storage Description #1 181.50' 22 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 181.50 15 0 0 182.00 71 22 22 Device Routing Invert Outlet Devices #1 Secondary 181.50'4.000 in/hr Exfiltration over Surface area #2 Primary 181.80'12inch-Dome Grate Capacity Primary OutFlow Max=0.09 cfs @ 12.16 hrs HW=181.84' TW=177.27' (Dynamic Tailwater) 2=12inch-Dome Grate Capacity (Custom Controls 0.09 cfs) Secondary OutFlow Max=0.00 cfs @ 12.16 hrs HW=181.84' TW=177.28' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.00 cfs) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 45HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 3: Surface 3 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.11 0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=2,519 sf Peak Elev=181.84' Storage=12 cf 0.10 cfs0.10 cfs 0.09 cfs 0.00 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 46HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 3S: Subsurface 3 Inflow = 0.01 cfs @ 12.18 hrs, Volume= 227 cf Outflow = 0.01 cfs @ 12.23 hrs, Volume= 226 cf, Atten= 0%, Lag= 2.6 min Primary = 0.01 cfs @ 12.23 hrs, Volume= 226 cf Routed to Reach P1 : 4" Pipe Under Path Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.28' @ 12.18 hrs Surf.Area= 71 sf Storage= 3 cf Plug-Flow detention time= 6.3 min calculated for 226 cf (100% of inflow) Center-of-Mass det. time= 5.6 min ( 940.1 - 934.5 ) Volume Invert Avail.Storage Storage Description #1 177.17' 66 cf Custom Stage Data (Prismatic) Listed below (Recalc) 165 cf Overall - 1 cf Embedded = 164 cf x 40.0% Voids #2 177.18' 1 cf 4.0" Round Pipe Storage Inside #1 L= 17.0' 67 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.17 71 0 0 179.50 71 165 165 Device Routing Invert Outlet Devices #1 Primary 177.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.23 hrs HW=177.28' TW=177.26' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.62 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 47HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 3S: Subsurface 3 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=177.28' Storage=3 cf 0.01 cfs 0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 48HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 4: Surface 4 Inflow Area = 2,525 sf, 10.02% Impervious, Inflow Depth = 1.44" for 2-YR event Inflow = 0.10 cfs @ 12.13 hrs, Volume= 303 cf Outflow = 0.07 cfs @ 12.19 hrs, Volume= 303 cf, Atten= 29%, Lag= 3.5 min Primary = 0.06 cfs @ 12.19 hrs, Volume= 70 cf Routed to Pond 5 : Surface 5 Secondary = 0.01 cfs @ 12.19 hrs, Volume= 233 cf Routed to Pond 4S : Subsurface 4 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 183.17' @ 12.19 hrs Surf.Area= 152 sf Storage= 54 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 24.6 min ( 873.5 - 848.9 ) Volume Invert Avail.Storage Storage Description #1 182.50' 119 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.50 14 0 0 183.00 114 32 32 183.51 229 87 119 Device Routing Invert Outlet Devices #1 Secondary 182.50'4.000 in/hr Exfiltration over Surface area #2 Primary 183.50'7.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 183.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 183.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.06 cfs @ 12.19 hrs HW=183.17' TW=182.64' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.06 cfs @ 1.32 fps) 4=Orifice/Grate ( Controls 0.00 cfs) Secondary OutFlow Max=0.01 cfs @ 12.19 hrs HW=183.17' TW=178.25' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 49HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 4: Surface 4 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.11 0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=2,525 sf Peak Elev=183.17' Storage=54 cf 0.10 cfs 0.07 cfs 0.06 cfs 0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 50HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 4S: Subsurface 4 Inflow = 0.01 cfs @ 12.19 hrs, Volume= 233 cf Outflow = 0.01 cfs @ 12.30 hrs, Volume= 232 cf, Atten= 5%, Lag= 6.3 min Primary = 0.01 cfs @ 12.30 hrs, Volume= 232 cf Routed to Pond 5S : Subsurface 5 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 178.25' @ 12.30 hrs Surf.Area= 229 sf Storage= 8 cf Plug-Flow detention time= 18.1 min calculated for 232 cf (100% of inflow) Center-of-Mass det. time= 16.2 min ( 929.2 - 913.0 ) Volume Invert Avail.Storage Storage Description #1 178.17' 212 cf Custom Stage Data (Prismatic) Listed below (Recalc) 534 cf Overall - 3 cf Embedded = 530 cf x 40.0% Voids #2 178.18' 3 cf 4.0" Round Pipe Storage Inside #1 L= 36.0' 215 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 178.17 229 0 0 180.50 229 534 534 Device Routing Invert Outlet Devices #1 Primary 178.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.30 hrs HW=178.25' TW=177.77' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.93 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 51HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 4S: Subsurface 4 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=178.25' Storage=8 cf 0.01 cfs 0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 52HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 5: Surface 5 Inflow Area = 2,697 sf, 10.53% Impervious, Inflow Depth = 0.41" for 2-YR event Inflow = 0.06 cfs @ 12.19 hrs, Volume= 92 cf Outflow = 0.06 cfs @ 12.23 hrs, Volume= 92 cf, Atten= 9%, Lag= 2.7 min Primary = 0.05 cfs @ 12.23 hrs, Volume= 56 cf Routed to Pond 6 : Surface 6 Secondary = 0.00 cfs @ 12.23 hrs, Volume= 36 cf Routed to Pond 5S : Subsurface 5 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 182.66' @ 12.23 hrs Surf.Area= 46 sf Storage= 16 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 13.1 min ( 779.7 - 766.6 ) Volume Invert Avail.Storage Storage Description #1 182.00' 36 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.00 2 0 0 182.50 36 10 10 183.01 68 27 36 Device Routing Invert Outlet Devices #1 Secondary 182.00'4.000 in/hr Exfiltration over Surface area #2 Primary 183.00'7.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 182.50'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 182.75'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.05 cfs @ 12.23 hrs HW=182.66' TW=182.10' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.05 cfs @ 1.28 fps) 4=Orifice/Grate ( Controls 0.00 cfs) Secondary OutFlow Max=0.00 cfs @ 12.23 hrs HW=182.66' TW=177.76' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.00 cfs) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 53HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 5: Surface 5 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=2,697 sf Peak Elev=182.66' Storage=16 cf 0.06 cfs 0.06 cfs 0.05 cfs 0.00 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 54HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 5S: Subsurface 5 Inflow = 0.02 cfs @ 12.28 hrs, Volume= 268 cf Outflow = 0.02 cfs @ 12.30 hrs, Volume= 268 cf, Atten= 0%, Lag= 1.5 min Primary = 0.02 cfs @ 12.30 hrs, Volume= 268 cf Routed to Pond 6S : Subsurface 6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.77' @ 12.30 hrs Surf.Area= 68 sf Storage= 3 cf Plug-Flow detention time= 5.4 min calculated for 268 cf (100% of inflow) Center-of-Mass det. time= 4.4 min ( 921.1 - 916.7 ) Volume Invert Avail.Storage Storage Description #1 177.67' 63 cf Custom Stage Data (Prismatic) Listed below (Recalc) 158 cf Overall - 1 cf Embedded = 157 cf x 40.0% Voids #2 177.68' 1 cf 4.0" Round Pipe Storage Inside #1 L= 12.0' 64 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.67 68 0 0 180.00 68 158 158 Device Routing Invert Outlet Devices #1 Primary 177.68'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 12.30 hrs HW=177.77' TW=177.28' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 0.99 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 55HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 5S: Subsurface 5 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=177.77' Storage=3 cf 0.02 cfs0.02 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 56HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 6: Surface 6 Inflow Area = 2,885 sf, 11.82% Impervious, Inflow Depth = 0.34" for 2-YR event Inflow = 0.06 cfs @ 12.23 hrs, Volume= 82 cf Outflow = 0.05 cfs @ 12.29 hrs, Volume= 82 cf, Atten= 13%, Lag= 3.6 min Primary = 0.04 cfs @ 12.29 hrs, Volume= 44 cf Routed to Pond 7 : Surface 7 Secondary = 0.00 cfs @ 12.29 hrs, Volume= 38 cf Routed to Pond 6S : Subsurface 6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 182.14' @ 12.29 hrs Surf.Area= 46 sf Storage= 17 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 14.4 min ( 787.6 - 773.1 ) Volume Invert Avail.Storage Storage Description #1 181.50' 37 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 181.50 2 0 0 182.00 40 11 11 182.51 63 26 37 Device Routing Invert Outlet Devices #1 Secondary 181.50'4.000 in/hr Exfiltration over Surface area #2 Primary 182.50'9.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 182.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 182.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.04 cfs @ 12.29 hrs HW=182.14' TW=181.04' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.04 cfs @ 1.22 fps) 4=Orifice/Grate ( Controls 0.00 cfs) Secondary OutFlow Max=0.00 cfs @ 12.29 hrs HW=182.14' TW=177.28' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.00 cfs) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 57HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 6: Surface 6 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=2,885 sf Peak Elev=182.14' Storage=17 cf 0.06 cfs 0.05 cfs 0.04 cfs 0.00 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 58HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 6S: Subsurface 6 Inflow = 0.02 cfs @ 12.30 hrs, Volume= 306 cf Outflow = 0.02 cfs @ 12.32 hrs, Volume= 306 cf, Atten= 0%, Lag= 1.3 min Primary = 0.02 cfs @ 12.32 hrs, Volume= 306 cf Routed to Pond 7S : Subsurface 7 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.28' @ 12.32 hrs Surf.Area= 63 sf Storage= 3 cf Plug-Flow detention time= 4.7 min calculated for 306 cf (100% of inflow) Center-of-Mass det. time= 3.9 min ( 914.4 - 910.5 ) Volume Invert Avail.Storage Storage Description #1 177.17' 58 cf Custom Stage Data (Prismatic) Listed below (Recalc) 147 cf Overall - 1 cf Embedded = 146 cf x 40.0% Voids #2 177.18' 1 cf 4.0" Round Pipe Storage Inside #1 L= 13.0' 59 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.17 63 0 0 179.50 63 147 147 Device Routing Invert Outlet Devices #1 Primary 177.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 12.32 hrs HW=177.28' TW=176.37' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 1.05 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 59HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 6S: Subsurface 6 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.024 0.023 0.022 0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=177.28' Storage=3 cf 0.02 cfs0.02 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 60HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 7: Surface 7 Inflow Area = 3,343 sf, 13.79% Impervious, Inflow Depth = 0.38" for 2-YR event Inflow = 0.05 cfs @ 12.28 hrs, Volume= 107 cf Outflow = 0.04 cfs @ 12.38 hrs, Volume= 107 cf, Atten= 26%, Lag= 5.9 min Primary = 0.03 cfs @ 12.38 hrs, Volume= 32 cf Routed to Pond 8 : Surface 8 Secondary = 0.01 cfs @ 12.38 hrs, Volume= 75 cf Routed to Pond 7S : Subsurface 7 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 181.12' @ 12.38 hrs Surf.Area= 71 sf Storage= 31 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 35.8 min ( 835.5 - 799.7 ) Volume Invert Avail.Storage Storage Description #1 180.00' 69 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 180.00 2 0 0 180.50 18 5 5 181.00 58 19 24 181.51 117 45 69 Device Routing Invert Outlet Devices #1 Secondary 180.00'4.000 in/hr Exfiltration over Surface area #2 Primary 181.50'10.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 181.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 181.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.03 cfs @ 12.38 hrs HW=181.12' TW=179.67' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.03 cfs @ 1.09 fps) 4=Orifice/Grate ( Controls 0.00 cfs) Secondary OutFlow Max=0.01 cfs @ 12.38 hrs HW=181.12' TW=176.36' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 61HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 7: Surface 7 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=3,343 sf Peak Elev=181.12' Storage=31 cf 0.05 cfs 0.04 cfs 0.03 cfs 0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 62HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 7S: Subsurface 7 [62] Hint: Exceeded Reach P1 OUTLET depth by 0.16' @ 12.20 hrs Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 3.45" for 2-YR event Inflow = 0.12 cfs @ 12.17 hrs, Volume= 725 cf Outflow = 0.12 cfs @ 12.19 hrs, Volume= 724 cf, Atten= 2%, Lag= 1.1 min Primary = 0.12 cfs @ 12.19 hrs, Volume= 724 cf Routed to Pond 8S : Subsurface 8 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 176.43' @ 12.19 hrs Surf.Area= 117 sf Storage= 13 cf Plug-Flow detention time= 5.5 min calculated for 724 cf (100% of inflow) Center-of-Mass det. time= 4.6 min ( 894.0 - 889.4 ) Volume Invert Avail.Storage Storage Description #1 176.17' 108 cf Custom Stage Data (Prismatic) Listed below (Recalc) 273 cf Overall - 2 cf Embedded = 271 cf x 40.0% Voids #2 176.18' 2 cf 4.0" Round Pipe Storage Inside #1 L= 21.0' 110 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 176.17 117 0 0 178.50 117 273 273 Device Routing Invert Outlet Devices #1 Primary 176.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.12 cfs @ 12.19 hrs HW=176.43' TW=174.93' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.12 cfs @ 1.71 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 63HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 7S: Subsurface 7 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,519 sf Peak Elev=176.43' Storage=13 cf 0.12 cfs0.12 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 64HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 8: Surface 8 Inflow Area = 3,973 sf, 13.21% Impervious, Inflow Depth = 0.33" for 2-YR event Inflow = 0.04 cfs @ 12.37 hrs, Volume= 108 cf Outflow = 0.01 cfs @ 12.69 hrs, Volume= 108 cf, Atten= 70%, Lag= 19.0 min Primary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routed to Reach P2 : 8" Pipe Secondary = 0.01 cfs @ 12.69 hrs, Volume= 108 cf Routed to Pond 8S : Subsurface 8 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 179.80' @ 12.69 hrs Surf.Area= 127 sf Storage= 41 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 37.4 min ( 856.7 - 819.2 ) Volume Invert Avail.Storage Storage Description #1 179.00' 164 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 179.00 7 0 0 179.50 49 14 14 179.75 120 21 35 180.50 223 129 164 Device Routing Invert Outlet Devices #1 Secondary 179.00'4.000 in/hr Exfiltration over Surface area #2 Primary 180.00'12inch-Dome Grate Capacity Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=179.00' TW=174.50' (Dynamic Tailwater) 2=12inch-Dome Grate Capacity ( Controls 0.00 cfs) Secondary OutFlow Max=0.01 cfs @ 12.69 hrs HW=179.80' TW=174.84' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 65HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 8: Surface 8 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.042 0.04 0.038 0.036 0.034 0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 Inflow Area=3,973 sf Peak Elev=179.80' Storage=41 cf 0.04 cfs 0.01 cfs 0.00 cfs 0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 66HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 8S: Subsurface 8 Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 3.96" for 2-YR event Inflow = 0.13 cfs @ 12.19 hrs, Volume= 832 cf Outflow = 0.12 cfs @ 12.21 hrs, Volume= 832 cf, Atten= 2%, Lag= 1.2 min Primary = 0.12 cfs @ 12.21 hrs, Volume= 832 cf Routed to Reach P2 : 8" Pipe Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 174.94' @ 12.21 hrs Surf.Area= 120 sf Storage= 14 cf Plug-Flow detention time= 5.0 min calculated for 831 cf (100% of inflow) Center-of-Mass det. time= 4.4 min ( 893.5 - 889.2 ) Volume Invert Avail.Storage Storage Description #1 174.67' 111 cf Custom Stage Data (Prismatic) Listed below (Recalc) 280 cf Overall - 2 cf Embedded = 278 cf x 40.0% Voids #2 174.68' 2 cf 4.0" Round Pipe Storage Inside #1 L= 24.0' 113 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.67 120 0 0 177.00 120 280 280 Device Routing Invert Outlet Devices #1 Primary 174.68'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.12 cfs @ 12.21 hrs HW=174.94' TW=174.64' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.12 cfs @ 1.73 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 67HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 8S: Subsurface 8 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,519 sf Peak Elev=174.94' Storage=14 cf 0.13 cfs0.12 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 68HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 9: Surface 9 Inflow Area = 3,923 sf, 27.20% Impervious, Inflow Depth = 1.66" for 2-YR event Inflow = 0.18 cfs @ 12.13 hrs, Volume= 541 cf Outflow = 0.18 cfs @ 12.14 hrs, Volume= 541 cf, Atten= 0%, Lag= 0.2 min Primary = 0.17 cfs @ 12.14 hrs, Volume= 340 cf Routed to Link 33L : On-site Closed Drainage Secondary = 0.01 cfs @ 12.14 hrs, Volume= 201 cf Routed to Pond 9S : Subsurface 9 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 174.32' @ 12.14 hrs Surf.Area= 54 sf Storage= 9 cf Plug-Flow detention time= 7.9 min calculated for 541 cf (100% of inflow) Center-of-Mass det. time= 7.9 min ( 845.4 - 837.5 ) Volume Invert Avail.Storage Storage Description #1 174.00' 86 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.00 1 0 0 175.00 170 86 86 Device Routing Invert Outlet Devices #1 Primary 174.25'12inch-Dome Grate Capacity #2 Secondary 174.00'4.000 in/hr Exfiltration over Surface area Primary OutFlow Max=0.17 cfs @ 12.14 hrs HW=174.32' TW=0.00' (Dynamic Tailwater) 1=12inch-Dome Grate Capacity (Custom Controls 0.17 cfs) Secondary OutFlow Max=0.01 cfs @ 12.14 hrs HW=174.32' TW=170.72' (Dynamic Tailwater) 2=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 69HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 9: Surface 9 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=3,923 sf Peak Elev=174.32' Storage=9 cf 0.18 cfs0.18 cfs0.17 cfs 0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 70HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 9S: Subsurface 9 Inflow = 0.01 cfs @ 12.14 hrs, Volume= 201 cf Outflow = 0.00 cfs @ 12.23 hrs, Volume= 200 cf, Atten= 8%, Lag= 5.9 min Primary = 0.00 cfs @ 12.23 hrs, Volume= 200 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 170.72' @ 12.23 hrs Surf.Area= 170 sf Storage= 9 cf Plug-Flow detention time= 40.3 min calculated for 200 cf (99% of inflow) Center-of-Mass det. time= 36.6 min ( 1,030.6 - 994.0 ) Volume Invert Avail.Storage Storage Description #1 170.67' 395 cf Custom Stage Data (Prismatic) Listed below (Recalc) 396 cf Overall - 1 cf Embedded = 395 cf #2 170.68' 1 cf 4.0" Round Pipe Storage Inside #1 L= 17.0' 396 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 170.67 170 0 0 173.00 170 396 396 Device Routing Invert Outlet Devices #1 Primary 170.68'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.00 cfs @ 12.23 hrs HW=170.72' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.00 cfs @ 0.71 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 71HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 9S: Subsurface 9 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Peak Elev=170.72' Storage=9 cf 0.01 cfs 0.00 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 72HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 10: Surface 10 Inflow Area = 3,386 sf, 9.57% Impervious, Inflow Depth = 1.44" for 2-YR event Inflow = 0.13 cfs @ 12.13 hrs, Volume= 407 cf Outflow = 0.13 cfs @ 12.14 hrs, Volume= 407 cf, Atten= 1%, Lag= 0.5 min Primary = 0.12 cfs @ 12.14 hrs, Volume= 143 cf Routed to Link 33L : On-site Closed Drainage Secondary = 0.01 cfs @ 12.14 hrs, Volume= 264 cf Routed to Pond 10S : Subsurface 10 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 173.30' @ 12.14 hrs Surf.Area= 113 sf Storage= 27 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 11.7 min ( 860.5 - 848.9 ) Volume Invert Avail.Storage Storage Description #1 173.00' 142 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 173.00 68 0 0 174.00 215 142 142 Device Routing Invert Outlet Devices #1 Primary 173.25'12inch-Dome Grate Capacity #2 Secondary 173.00'4.000 in/hr Exfiltration over Surface area Primary OutFlow Max=0.12 cfs @ 12.14 hrs HW=173.30' TW=0.00' (Dynamic Tailwater) 1=12inch-Dome Grate Capacity (Custom Controls 0.12 cfs) Secondary OutFlow Max=0.01 cfs @ 12.14 hrs HW=173.30' TW=168.74' (Dynamic Tailwater) 2=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 73HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 10: Surface 10 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=3,386 sf Peak Elev=173.30' Storage=27 cf 0.13 cfs0.13 cfs 0.12 cfs 0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 74HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 10S: Subsurface 10 Inflow = 0.01 cfs @ 12.14 hrs, Volume= 264 cf Outflow = 0.01 cfs @ 12.19 hrs, Volume= 264 cf, Atten= 1%, Lag= 3.2 min Primary = 0.01 cfs @ 12.19 hrs, Volume= 264 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 168.74' @ 12.19 hrs Surf.Area= 215 sf Storage= 6 cf Plug-Flow detention time= 14.7 min calculated for 264 cf (100% of inflow) Center-of-Mass det. time= 12.9 min ( 939.2 - 926.2 ) Volume Invert Avail.Storage Storage Description #1 168.67' 200 cf Custom Stage Data (Prismatic) Listed below (Recalc) 501 cf Overall - 2 cf Embedded = 499 cf x 40.0% Voids #2 168.68' 2 cf 4.0" Round Pipe Storage Inside #1 L= 18.0' 201 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 168.67 215 0 0 171.00 215 501 501 Device Routing Invert Outlet Devices #1 Primary 168.68'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.19 hrs HW=168.74' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.82 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 75HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 10S: Subsurface 10 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.011 0.011 0.01 0.01 0.009 0.009 0.008 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Peak Elev=168.74' Storage=6 cf 0.01 cfs0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 76HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 11: Surface 11 [87] Warning: Oscillations may require smaller dt or Finer Routing (severity=2) Inflow Area = 2,880 sf, 39.41% Impervious, Inflow Depth = 1.83" for 2-YR event Inflow = 0.10 cfs @ 12.13 hrs, Volume= 439 cf Outflow = 0.10 cfs @ 12.14 hrs, Volume= 439 cf, Atten= 2%, Lag= 0.7 min Primary = 0.09 cfs @ 12.14 hrs, Volume= 76 cf Routed to Reach P3 : 4" Outlet Pipe Secondary = 0.01 cfs @ 12.14 hrs, Volume= 363 cf Routed to Pond 11S : Subsurface 11 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 185.34' @ 12.14 hrs Surf.Area= 109 sf Storage= 48 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 42.4 min ( 1,077.0 - 1,034.6 ) Volume Invert Avail.Storage Storage Description #1 184.50' 284 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 184.50 23 0 0 185.00 56 20 20 186.00 211 134 153 186.50 310 130 284 Device Routing Invert Outlet Devices #1 Secondary 184.50'4.000 in/hr Exfiltration over Surface area #2 Primary 185.30'12inch-Dome Grate Capacity Primary OutFlow Max=0.09 cfs @ 12.14 hrs HW=185.34' TW=183.25' (Dynamic Tailwater) 2=12inch-Dome Grate Capacity (Custom Controls 0.09 cfs) Secondary OutFlow Max=0.01 cfs @ 12.14 hrs HW=185.34' TW=183.24' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 77HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 11: Surface 11 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.11 0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=2,880 sf Peak Elev=185.34' Storage=48 cf 0.10 cfs0.10 cfs 0.09 cfs 0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 78HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 11S: Subsurface 11 [90] Warning: Qout>Qin may require smaller dt or Finer Routing Inflow = 0.01 cfs @ 12.14 hrs, Volume= 363 cf Outflow = 0.01 cfs @ 12.30 hrs, Volume= 363 cf, Atten= 0%, Lag= 9.1 min Primary = 0.01 cfs @ 12.30 hrs, Volume= 363 cf Routed to Reach P3 : 4" Outlet Pipe Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 183.26' @ 12.21 hrs Surf.Area= 310 sf Storage= 11 cf Plug-Flow detention time= 22.9 min calculated for 363 cf (100% of inflow) Center-of-Mass det. time= 22.3 min ( 1,170.2 - 1,147.9 ) Volume Invert Avail.Storage Storage Description #1 183.17' 289 cf Custom Stage Data (Prismatic) Listed below (Recalc) 722 cf Overall x 40.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 183.17 310 0 0 185.50 310 722 722 Device Routing Invert Outlet Devices #1 Primary 183.17'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.30 hrs HW=183.25' TW=183.23' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.74 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 79HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 11S: Subsurface 11 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.013 0.013 0.012 0.012 0.011 0.011 0.01 0.01 0.009 0.009 0.008 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Peak Elev=183.26' Storage=11 cf 0.01 cfs 0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 80HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 29P: Landscape Filter Inflow Area = 5,639 sf,100.00% Impervious, Inflow Depth = 2.85" for 2-YR event Inflow = 0.37 cfs @ 12.13 hrs, Volume= 1,338 cf Outflow = 0.30 cfs @ 12.17 hrs, Volume= 1,333 cf, Atten= 19%, Lag= 2.7 min Primary = 0.30 cfs @ 12.17 hrs, Volume= 1,333 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 170.87' @ 12.17 hrs Surf.Area= 1,000 sf Storage= 146 cf Plug-Flow detention time= 30.3 min calculated for 1,333 cf (100% of inflow) Center-of-Mass det. time= 28.2 min ( 787.4 - 759.3 ) Volume Invert Avail.Storage Storage Description #1 170.50' 1,000 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 170.50 1,000 0.0 0 0 170.51 1,000 40.0 4 4 171.50 1,000 40.0 396 400 171.51 1,000 20.0 2 402 174.50 1,000 20.0 598 1,000 Device Routing Invert Outlet Devices #1 Primary 170.51'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.30 cfs @ 12.17 hrs HW=170.87' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.30 cfs @ 2.03 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 81HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 29P: Landscape Filter Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=5,639 sf Peak Elev=170.87' Storage=146 cf 0.37 cfs 0.30 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 82HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 30P: Porous Pavers Inflow Area = 443 sf, 33.86% Impervious, Inflow Depth = 1.73" for 2-YR event Inflow = 0.00 cfs @ 21.71 hrs, Volume= 64 cf Outflow = 0.00 cfs @ 21.74 hrs, Volume= 63 cf, Atten= 0%, Lag= 1.8 min Primary = 0.00 cfs @ 21.74 hrs, Volume= 63 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 174.95' @ 21.74 hrs Surf.Area= 150 sf Storage= 2 cf Plug-Flow detention time= 38.5 min calculated for 63 cf (99% of inflow) Center-of-Mass det. time= 27.6 min ( 1,484.1 - 1,456.5 ) Volume Invert Avail.Storage Storage Description #1 174.92' 135 cf 31" section beneath paver (Prismatic) Listed below (Recalc) 387 cf Overall - 2 cf Embedded = 385 cf x 35.0% Voids #2 174.93' 2 cf 4.0" Round Pipe Storage Inside #1 L= 28.0' 137 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.92 150 0 0 177.50 150 387 387 Device Routing Invert Outlet Devices #1 Primary 174.93'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.00 cfs @ 21.74 hrs HW=174.95' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.00 cfs @ 0.52 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 83HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 30P: Porous Pavers Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.002 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0 0 Inflow Area=443 sf Peak Elev=174.95' Storage=2 cf 0.00 cfs0.00 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 84HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 31P: Distribution Pipes [57] Hint: Peaked at 173.72' (Flood elevation advised) Inflow Area = 2,750 sf,100.00% Impervious, Inflow Depth = 2.85" for 2-YR event Inflow = 0.18 cfs @ 12.13 hrs, Volume= 653 cf Outflow = 0.18 cfs @ 12.13 hrs, Volume= 653 cf, Atten= 0%, Lag= 0.0 min Primary = 0.18 cfs @ 12.13 hrs, Volume= 652 cf Routed to Pond 29P : Landscape Filter Secondary = 0.00 cfs @ 12.13 hrs, Volume= 0 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 173.72' @ 12.13 hrs Device Routing Invert Outlet Devices #1 Secondary 173.70'6.0" Vert. Overflow C= 0.600 Limited to weir flow at low heads #2 Primary 173.37'4.0" Vert. Distribution Pipe C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.18 cfs @ 12.13 hrs HW=173.72' TW=170.84' (Dynamic Tailwater) 2=Distribution Pipe (Orifice Controls 0.18 cfs @ 2.09 fps) Secondary OutFlow Max=0.00 cfs @ 12.13 hrs HW=173.72' TW=0.00' (Dynamic Tailwater) 1=Overflow (Orifice Controls 0.00 cfs @ 0.53 fps) Pond 31P: Distribution Pipes Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,750 sf Peak Elev=173.72' 0.18 cfs0.18 cfs0.18 cfs 0.00 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 85HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 33P: Distribution Pipes [57] Hint: Peaked at 173.74' (Flood elevation advised) Inflow Area = 2,889 sf,100.00% Impervious, Inflow Depth = 2.85" for 2-YR event Inflow = 0.19 cfs @ 12.13 hrs, Volume= 686 cf Outflow = 0.19 cfs @ 12.13 hrs, Volume= 686 cf, Atten= 0%, Lag= 0.0 min Primary = 0.19 cfs @ 12.13 hrs, Volume= 685 cf Routed to Pond 29P : Landscape Filter Secondary = 0.00 cfs @ 12.13 hrs, Volume= 1 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 173.74' @ 12.13 hrs Device Routing Invert Outlet Devices #1 Secondary 173.70'4.0" Vert. Overflow C= 0.600 Limited to weir flow at low heads #2 Primary 173.37'4.0" Vert. Distribution Pipe C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.19 cfs @ 12.13 hrs HW=173.74' TW=170.84' (Dynamic Tailwater) 2=Distribution Pipe (Orifice Controls 0.19 cfs @ 2.17 fps) Secondary OutFlow Max=0.00 cfs @ 12.13 hrs HW=173.74' TW=0.00' (Dynamic Tailwater) 1=Overflow (Orifice Controls 0.00 cfs @ 0.68 fps) Pond 33P: Distribution Pipes Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,889 sf Peak Elev=173.74' 0.19 cfs0.19 cfs0.19 cfs 0.00 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 86HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond PN: Porous Pavers Inflow Area = 676 sf, 77.51% Impervious, Inflow Depth = 2.43" for 2-YR event Inflow = 0.00 cfs @ 20.97 hrs, Volume= 137 cf Outflow = 0.00 cfs @ 21.17 hrs, Volume= 135 cf, Atten= 0%, Lag= 12.2 min Primary = 0.00 cfs @ 21.17 hrs, Volume= 135 cf Routed to Pond 11 : Surface 11 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 188.47' @ 21.17 hrs Surf.Area= 464 sf Storage= 8 cf Plug-Flow detention time= 78.2 min calculated for 135 cf (99% of inflow) Center-of-Mass det. time= 62.5 min ( 1,478.3 - 1,415.9 ) Volume Invert Avail.Storage Storage Description #1 188.42' 417 cf 31" section beneath pavers (Prismatic) Listed below (Recalc) 1,197 cf Overall - 6 cf Embedded = 1,191 cf x 35.0% Voids #2 188.43' 6 cf 4.0" Round Pipe Storage Inside #1 L= 67.0' 423 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 188.42 464 0 0 191.00 464 1,197 1,197 Device Routing Invert Outlet Devices #1 Primary 188.43'4.0" Round Culvert L= 7.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 188.43' / 186.00' S= 0.3471 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.09 sf Primary OutFlow Max=0.00 cfs @ 21.17 hrs HW=188.47' TW=184.94' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.00 cfs @ 0.53 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 87HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond PN: Porous Pavers Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.003 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Inflow Area=676 sf Peak Elev=188.47' Storage=8 cf 4.0" Round Culvert n=0.013 L=7.0' S=0.3471 '/' 0.00 cfs0.00 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 88HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond PS: Porous Pavers Inflow Area = 2,379 sf, 11.60% Impervious, Inflow Depth = 1.44" for 2-YR event Inflow = 0.01 cfs @ 21.72 hrs, Volume= 286 cf Outflow = 0.01 cfs @ 21.77 hrs, Volume= 285 cf, Atten= 0%, Lag= 3.0 min Primary = 0.01 cfs @ 21.77 hrs, Volume= 285 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 174.98' @ 21.77 hrs Surf.Area= 248 sf Storage= 5 cf Plug-Flow detention time= 24.1 min calculated for 285 cf (100% of inflow) Center-of-Mass det. time= 19.5 min ( 1,491.8 - 1,472.2 ) Volume Invert Avail.Storage Storage Description #1 174.92' 223 cf 31" section beneath paver (Prismatic) Listed below (Recalc) 640 cf Overall - 2 cf Embedded = 637 cf x 35.0% Voids #2 174.93' 2 cf 4.0" Round Pipe Storage Inside #1 L= 28.0' 226 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.92 248 0 0 177.50 248 640 640 Device Routing Invert Outlet Devices #1 Primary 174.93'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 21.77 hrs HW=174.98' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.76 fps) NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 89HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond PS: Porous Pavers Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.007 0.007 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Inflow Area=2,379 sf Peak Elev=174.98' Storage=5 cf 0.01 cfs0.01 cfs NOAA 24-hr D 2-YR Rainfall=3.08"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 90HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Link 33L: On-site Closed Drainage Inflow Area = 27,635 sf, 35.49% Impervious, Inflow Depth = 1.81" for 2-YR event Inflow = 0.87 cfs @ 12.15 hrs, Volume= 4,171 cf Primary = 0.87 cfs @ 12.15 hrs, Volume= 4,171 cf, Atten= 0%, Lag= 0.0 min Routed to Reach DP-PR : Proposed Site Primary outflow = Inflow, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs Link 33L: On-site Closed Drainage Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=27,635 sf 0.87 cfs0.87 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 91HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Time span=0.00-100.00 hrs, dt=0.01 hrs, 10001 points x 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=1,918 sf 33.52% Impervious Runoff Depth=3.41"Subcatchment PR1: Basin 1 Tc=6.0 min CN=86 Runoff=0.17 cfs 545 cf Runoff Area=3,386 sf 9.57% Impervious Runoff Depth=3.03"Subcatchment PR10: Basin 10 Tc=6.0 min CN=82 Runoff=0.27 cfs 854 cf Runoff Area=2,204 sf 27.72% Impervious Runoff Depth=3.31"Subcatchment PR11: Basin 11 Tc=6.0 min CN=85 Runoff=0.19 cfs 608 cf Runoff Area=2,493 sf 1.36% Impervious Runoff Depth=2.84"Subcatchment PR12: West site to Area Drain Tc=6.0 min CN=80 Runoff=0.19 cfs 590 cf Runoff Area=2,379 sf 11.60% Impervious Runoff Depth=3.03"Subcatchment PR13: Pavers front Tc=674.0 min CN=82 Runoff=0.01 cfs 600 cf Runoff Area=676 sf 77.51% Impervious Runoff Depth=4.25"Subcatchment PR14: Pavers North Tc=674.0 min CN=94 Runoff=0.01 cfs 239 cf Runoff Area=2,750 sf 100.00% Impervious Runoff Depth=4.70"Subcatchment PR15a: Roof West Tc=6.0 min CN=98 Runoff=0.30 cfs 1,078 cf Runoff Area=2,889 sf 100.00% Impervious Runoff Depth=4.70"Subcatchment PR15b: Roof East Tc=6.0 min CN=98 Runoff=0.31 cfs 1,132 cf Runoff Area=13,694 sf 44.87% Impervious Runoff Depth=3.61"Subcatchment PR16: Remainder of site Tc=6.0 min CN=88 Runoff=1.28 cfs 4,122 cf Runoff Area=443 sf 33.86% Impervious Runoff Depth=3.41"Subcatchment PR17: Pavers path Tc=674.0 min CN=86 Runoff=0.00 cfs 126 cf Runoff Area=164 sf 0.00% Impervious Runoff Depth=2.84"Subcatchment PR2: Basin 2 Tc=6.0 min CN=80 Runoff=0.01 cfs 39 cf Runoff Area=437 sf 3.20% Impervious Runoff Depth=2.93"Subcatchment PR3: Basin 3 Tc=6.0 min CN=81 Runoff=0.03 cfs 107 cf Runoff Area=2,525 sf 10.02% Impervious Runoff Depth=3.03"Subcatchment PR4: Basin 4 Tc=6.0 min CN=82 Runoff=0.20 cfs 637 cf Runoff Area=172 sf 18.02% Impervious Runoff Depth=3.12"Subcatchment PR5: Basin 5 Tc=6.0 min CN=83 Runoff=0.01 cfs 45 cf Runoff Area=188 sf 30.32% Impervious Runoff Depth=3.31"Subcatchment PR6: Basin 6 Tc=6.0 min CN=85 Runoff=0.02 cfs 52 cf Runoff Area=458 sf 26.20% Impervious Runoff Depth=3.31"Subcatchment PR7: Basin 7 Tc=6.0 min CN=85 Runoff=0.04 cfs 126 cf NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 92HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Runoff Area=630 sf 10.16% Impervious Runoff Depth=3.03"Subcatchment PR8: Basin 8 Tc=6.0 min CN=82 Runoff=0.05 cfs 159 cf Runoff Area=3,923 sf 27.20% Impervious Runoff Depth=3.31"Subcatchment PR9: Basin 9 Tc=6.0 min CN=85 Runoff=0.34 cfs 1,083 cf Inflow=2.98 cfs 12,128 cfReach DP-PR: Proposed Site Outflow=2.98 cfs 12,128 cf Avg. Flow Depth=0.13' Max Vel=5.25 fps Inflow=0.21 cfs 690 cfReach P1: 4" Pipe Under Path 6.0" Round Pipe n=0.013 L=15.0' S=0.0667 '/' Capacity=1.45 cfs Outflow=0.21 cfs 690 cf Avg. Flow Depth=0.25' Max Vel=3.46 fps Inflow=0.42 cfs 1,706 cfReach P2: 8" Pipe 8.0" Round Pipe n=0.013 L=65.0' S=0.0129 '/' Capacity=1.37 cfs Outflow=0.42 cfs 1,706 cf Avg. Flow Depth=0.12' Max Vel=5.27 fps Inflow=0.18 cfs 846 cfReach P3: 4" Outlet Pipe 6.0" Round Pipe n=0.013 L=136.0' S=0.0748 '/' Capacity=1.53 cfs Outflow=0.18 cfs 846 cf Peak Elev=183.33' Storage=14 cf Inflow=0.17 cfs 545 cfPond 1: Surface 1 Primary=0.17 cfs 431 cf Secondary=0.00 cfs 114 cf Outflow=0.17 cfs 545 cf Peak Elev=178.21' Storage=1 cf Inflow=0.00 cfs 114 cfPond 1S: Subsurface 1 Outflow=0.00 cfs 114 cf Peak Elev=182.84' Storage=19 cf Inflow=0.18 cfs 470 cfPond 2: Surface 2 Primary=0.17 cfs 352 cf Secondary=0.00 cfs 118 cf Outflow=0.17 cfs 470 cf Peak Elev=177.73' Storage=2 cf Inflow=0.01 cfs 232 cfPond 2S: Subsurface 2 Outflow=0.01 cfs 232 cf Peak Elev=181.87' Storage=13 cf Inflow=0.20 cfs 458 cfPond 3: Surface 3 Primary=0.20 cfs 334 cf Secondary=0.01 cfs 124 cf Outflow=0.20 cfs 458 cf Peak Elev=177.32' Storage=4 cf Inflow=0.01 cfs 356 cfPond 3S: Subsurface 3 Outflow=0.02 cfs 356 cf Peak Elev=183.32' Storage=80 cf Inflow=0.20 cfs 637 cfPond 4: Surface 4 Primary=0.16 cfs 260 cf Secondary=0.02 cfs 377 cf Outflow=0.17 cfs 637 cf Peak Elev=178.26' Storage=9 cf Inflow=0.02 cfs 377 cfPond 4S: Subsurface 4 Outflow=0.02 cfs 376 cf Peak Elev=182.82' Storage=24 cf Inflow=0.17 cfs 305 cfPond 5: Surface 5 Primary=0.16 cfs 244 cf Secondary=0.01 cfs 61 cf Outflow=0.16 cfs 305 cf Peak Elev=177.78' Storage=3 cf Inflow=0.02 cfs 437 cfPond 5S: Subsurface 5 Outflow=0.02 cfs 436 cf Peak Elev=182.33' Storage=26 cf Inflow=0.17 cfs 296 cfPond 6: Surface 6 Primary=0.16 cfs 234 cf Secondary=0.01 cfs 62 cf Outflow=0.17 cfs 296 cf NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 93HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Peak Elev=177.29' Storage=3 cf Inflow=0.03 cfs 498 cfPond 6S: Subsurface 6 Outflow=0.03 cfs 498 cf Peak Elev=181.34' Storage=50 cf Inflow=0.19 cfs 360 cfPond 7: Surface 7 Primary=0.17 cfs 243 cf Secondary=0.01 cfs 117 cf Outflow=0.18 cfs 360 cf Peak Elev=176.65' Storage=24 cf Inflow=0.24 cfs 1,305 cfPond 7S: Subsurface 7 Outflow=0.23 cfs 1,305 cf Peak Elev=180.07' Storage=81 cf Inflow=0.21 cfs 402 cfPond 8: Surface 8 Primary=0.19 cfs 192 cf Secondary=0.02 cfs 210 cf Outflow=0.20 cfs 402 cf Peak Elev=175.16' Storage=25 cf Inflow=0.25 cfs 1,515 cfPond 8S: Subsurface 8 Outflow=0.24 cfs 1,514 cf Peak Elev=174.36' Storage=11 cf Inflow=0.34 cfs 1,083 cfPond 9: Surface 9 Primary=0.34 cfs 833 cf Secondary=0.01 cfs 250 cf Outflow=0.34 cfs 1,083 cf Peak Elev=170.73' Storage=9 cf Inflow=0.01 cfs 250 cfPond 9S: Subsurface 9 Outflow=0.01 cfs 248 cf Peak Elev=173.34' Storage=32 cf Inflow=0.27 cfs 854 cfPond 10: Surface 10 Primary=0.26 cfs 442 cf Secondary=0.01 cfs 412 cf Outflow=0.27 cfs 854 cf Peak Elev=168.74' Storage=6 cf Inflow=0.01 cfs 412 cfPond 10S: Subsurface 10 Outflow=0.01 cfs 411 cf Peak Elev=185.37' Storage=51 cf Inflow=0.19 cfs 846 cfPond 11: Surface 11 Primary=0.18 cfs 267 cf Secondary=0.01 cfs 579 cf Outflow=0.19 cfs 846 cf Peak Elev=183.29' Storage=15 cf Inflow=0.01 cfs 579 cfPond 11S: Subsurface 11 Outflow=0.02 cfs 579 cf Peak Elev=170.96' Storage=182 cf Inflow=0.48 cfs 2,166 cfPond 29P: Landscape Filter Outflow=0.42 cfs 2,162 cf Peak Elev=174.96' Storage=2 cf Inflow=0.00 cfs 126 cfPond 30P: Porous Pavers Outflow=0.00 cfs 125 cf Peak Elev=173.85' Inflow=0.30 cfs 1,078 cfPond 31P: Distribution Pipes Primary=0.23 cfs 1,057 cf Secondary=0.06 cfs 21 cf Outflow=0.30 cfs 1,078 cf Peak Elev=173.88' Inflow=0.31 cfs 1,132 cfPond 33P: Distribution Pipes Primary=0.25 cfs 1,109 cf Secondary=0.07 cfs 23 cf Outflow=0.31 cfs 1,132 cf Peak Elev=188.48' Storage=10 cf Inflow=0.01 cfs 239 cfPond PN: Porous Pavers 4.0" Round Culvert n=0.013 L=7.0' S=0.3471 '/' Outflow=0.01 cfs 238 cf Peak Elev=175.00' Storage=8 cf Inflow=0.01 cfs 600 cfPond PS: Porous Pavers Outflow=0.01 cfs 599 cf NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 94HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Inflow=1.71 cfs 8,007 cfLink 33L: On-site Closed Drainage Primary=1.71 cfs 8,007 cf Total Runoff Area = 41,329 sf Runoff Volume = 12,142 cf Average Runoff Depth = 3.53" 61.40% Pervious = 25,378 sf 38.60% Impervious = 15,951 sf NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 95HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR1: Basin 1 Runoff = 0.17 cfs @ 12.13 hrs, Volume= 545 cf, Depth= 3.41" Routed to Pond 1 : Surface 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 643 98 Site Impervious 1,275 80 >75% Grass cover, Good, HSG D 1,918 86 Weighted Average 1,275 66.48% Pervious Area 643 33.52% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR1: Basin 1 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=1,918 sf Runoff Volume=545 cf Runoff Depth=3.41" Tc=6.0 min CN=86 0.17 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 96HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR10: Basin 10 Runoff = 0.27 cfs @ 12.13 hrs, Volume= 854 cf, Depth= 3.03" Routed to Pond 10 : Surface 10 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 324 98 Site Impervious 3,062 80 >75% Grass cover, Good, HSG D 3,386 82 Weighted Average 3,062 90.43% Pervious Area 324 9.57% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR10: Basin 10 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=3,386 sf Runoff Volume=854 cf Runoff Depth=3.03" Tc=6.0 min CN=82 0.27 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 97HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR11: Basin 11 Runoff = 0.19 cfs @ 12.13 hrs, Volume= 608 cf, Depth= 3.31" Routed to Pond 11 : Surface 11 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 611 98 Site Impervious 1,593 80 >75% Grass cover, Good, HSG D 2,204 85 Weighted Average 1,593 72.28% Pervious Area 611 27.72% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR11: Basin 11 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=2,204 sf Runoff Volume=608 cf Runoff Depth=3.31" Tc=6.0 min CN=85 0.19 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 98HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR12: West site to Area Drain Runoff = 0.19 cfs @ 12.13 hrs, Volume= 590 cf, Depth= 2.84" Routed to Link 33L : On-site Closed Drainage Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 34 98 Site Impervious 2,459 80 >75% Grass cover, Good, HSG D 2,493 80 Weighted Average 2,459 98.64% Pervious Area 34 1.36% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR12: West site to Area Drain Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=2,493 sf Runoff Volume=590 cf Runoff Depth=2.84" Tc=6.0 min CN=80 0.19 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 99HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR13: Pavers front Runoff = 0.01 cfs @ 21.71 hrs, Volume= 600 cf, Depth= 3.03" Routed to Pond PS : Porous Pavers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 28 98 Site Impervious * 248 98 Permeable Pavers 2,103 80 >75% Grass cover, Good, HSG D 2,379 82 Weighted Average 2,103 88.40% Pervious Area 276 11.60% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 674.0 Direct Entry, Paver Tc Subcatchment PR13: Pavers front Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=2,379 sf Runoff Volume=600 cf Runoff Depth=3.03" Tc=674.0 min CN=82 0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 100HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR14: Pavers North Runoff = 0.01 cfs @ 20.96 hrs, Volume= 239 cf, Depth= 4.25" Routed to Pond PN : Porous Pavers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 60 98 Site Impervious * 464 98 Porous Pavers 152 80 >75% Grass cover, Good, HSG D 676 94 Weighted Average 152 22.49% Pervious Area 524 77.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 674.0 Direct Entry, Pavers Tc Subcatchment PR14: Pavers North Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=676 sf Runoff Volume=239 cf Runoff Depth=4.25" Tc=674.0 min CN=94 0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 101HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR15a: Roof West Runoff = 0.30 cfs @ 12.13 hrs, Volume= 1,078 cf, Depth= 4.70" Routed to Pond 31P : Distribution Pipes Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 2,750 98 Roof 2,750 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR15a: Roof West Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=2,750 sf Runoff Volume=1,078 cf Runoff Depth=4.70" Tc=6.0 min CN=98 0.30 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 102HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR15b: Roof East Runoff = 0.31 cfs @ 12.13 hrs, Volume= 1,132 cf, Depth= 4.70" Routed to Pond 33P : Distribution Pipes Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 2,889 98 Roof 2,889 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR15b: Roof East Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=2,889 sf Runoff Volume=1,132 cf Runoff Depth=4.70" Tc=6.0 min CN=98 0.31 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 103HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR16: Remainder of site Runoff = 1.28 cfs @ 12.13 hrs, Volume= 4,122 cf, Depth= 3.61" Routed to Reach DP-PR : Proposed Site Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 6,144 98 Site Impervious 7,550 80 >75% Grass cover, Good, HSG D 13,694 88 Weighted Average 7,550 55.13% Pervious Area 6,144 44.87% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR16: Remainder of site Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)1 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=13,694 sf Runoff Volume=4,122 cf Runoff Depth=3.61" Tc=6.0 min CN=88 1.28 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 104HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR17: Pavers path Runoff = 0.00 cfs @ 20.97 hrs, Volume= 126 cf, Depth= 3.41" Routed to Pond 30P : Porous Pavers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 150 98 Permeable Pavers 293 80 >75% Grass cover, Good, HSG D 443 86 Weighted Average 293 66.14% Pervious Area 150 33.86% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 674.0 Direct Entry, Paver Tc Subcatchment PR17: Pavers path Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=443 sf Runoff Volume=126 cf Runoff Depth=3.41" Tc=674.0 min CN=86 0.00 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 105HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR2: Basin 2 Runoff = 0.01 cfs @ 12.13 hrs, Volume= 39 cf, Depth= 2.84" Routed to Pond 2 : Surface 2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description 164 80 >75% Grass cover, Good, HSG D 164 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR2: Basin 2 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=164 sf Runoff Volume=39 cf Runoff Depth=2.84" Tc=6.0 min CN=80 0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 106HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR3: Basin 3 Runoff = 0.03 cfs @ 12.13 hrs, Volume= 107 cf, Depth= 2.93" Routed to Pond 3 : Surface 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 14 98 Site Impervious 423 80 >75% Grass cover, Good, HSG D 437 81 Weighted Average 423 96.80% Pervious Area 14 3.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR3: Basin 3 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.038 0.036 0.034 0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=437 sf Runoff Volume=107 cf Runoff Depth=2.93" Tc=6.0 min CN=81 0.03 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 107HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR4: Basin 4 Runoff = 0.20 cfs @ 12.13 hrs, Volume= 637 cf, Depth= 3.03" Routed to Pond 4 : Surface 4 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 253 98 Impervious 2,272 80 >75% Grass cover, Good, HSG D 2,525 82 Weighted Average 2,272 89.98% Pervious Area 253 10.02% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR4: Basin 4 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=2,525 sf Runoff Volume=637 cf Runoff Depth=3.03" Tc=6.0 min CN=82 0.20 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 108HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR5: Basin 5 Runoff = 0.01 cfs @ 12.13 hrs, Volume= 45 cf, Depth= 3.12" Routed to Pond 5 : Surface 5 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 31 98 Site Impervious 141 80 >75% Grass cover, Good, HSG D 172 83 Weighted Average 141 81.98% Pervious Area 31 18.02% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR5: Basin 5 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=172 sf Runoff Volume=45 cf Runoff Depth=3.12" Tc=6.0 min CN=83 0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 109HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR6: Basin 6 Runoff = 0.02 cfs @ 12.13 hrs, Volume= 52 cf, Depth= 3.31" Routed to Pond 6 : Surface 6 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 57 98 Site Impervious 131 80 >75% Grass cover, Good, HSG D 188 85 Weighted Average 131 69.68% Pervious Area 57 30.32% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR6: Basin 6 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=188 sf Runoff Volume=52 cf Runoff Depth=3.31" Tc=6.0 min CN=85 0.02 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 110HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR7: Basin 7 Runoff = 0.04 cfs @ 12.13 hrs, Volume= 126 cf, Depth= 3.31" Routed to Pond 7 : Surface 7 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 120 98 Site Impervious 338 80 >75% Grass cover, Good, HSG D 458 85 Weighted Average 338 73.80% Pervious Area 120 26.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR7: Basin 7 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.044 0.042 0.04 0.038 0.036 0.034 0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=458 sf Runoff Volume=126 cf Runoff Depth=3.31" Tc=6.0 min CN=85 0.04 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 111HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR8: Basin 8 Runoff = 0.05 cfs @ 12.13 hrs, Volume= 159 cf, Depth= 3.03" Routed to Pond 8 : Surface 8 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 64 98 Site Impervious 566 80 >75% Grass cover, Good, HSG D 630 82 Weighted Average 566 89.84% Pervious Area 64 10.16% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR8: Basin 8 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=630 sf Runoff Volume=159 cf Runoff Depth=3.03" Tc=6.0 min CN=82 0.05 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 112HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR9: Basin 9 Runoff = 0.34 cfs @ 12.13 hrs, Volume= 1,083 cf, Depth= 3.31" Routed to Pond 9 : Surface 9 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-YR Rainfall=4.94" Area (sf) CN Description * 1,067 98 Impervious 2,856 80 >75% Grass cover, Good, HSG D 3,923 85 Weighted Average 2,856 72.80% Pervious Area 1,067 27.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR9: Basin 9 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 10-YR Rainfall=4.94" Runoff Area=3,923 sf Runoff Volume=1,083 cf Runoff Depth=3.31" Tc=6.0 min CN=85 0.34 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 113HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach DP-PR: Proposed Site [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 41,329 sf, 38.60% Impervious, Inflow Depth = 3.52" for 10-YR event Inflow = 2.98 cfs @ 12.14 hrs, Volume= 12,128 cf Outflow = 2.98 cfs @ 12.14 hrs, Volume= 12,128 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Reach DP-PR: Proposed Site Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)3 2 1 0 Inflow Area=41,329 sf 2.98 cfs2.98 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 114HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach P1: 4" Pipe Under Path [52] Hint: Inlet/Outlet conditions not evaluated Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 3.29" for 10-YR event Inflow = 0.21 cfs @ 12.16 hrs, Volume= 690 cf Outflow = 0.21 cfs @ 12.16 hrs, Volume= 690 cf, Atten= 0%, Lag= 0.0 min Routed to Pond 7S : Subsurface 7 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Max. Velocity= 5.25 fps, Min. Travel Time= 0.0 min Avg. Velocity = 1.75 fps, Avg. Travel Time= 0.1 min Peak Storage= 1 cf @ 12.16 hrs Average Depth at Peak Storage= 0.13' , Surface Width= 0.44' Bank-Full Depth= 0.50' Flow Area= 0.2 sf, Capacity= 1.45 cfs 6.0" Round Pipe n= 0.013 Corrugated PE, smooth interior Length= 15.0' Slope= 0.0667 '/' Inlet Invert= 177.18', Outlet Invert= 176.18' NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 115HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Reach P1: 4" Pipe Under Path Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,519 sf Avg. Flow Depth=0.13' Max Vel=5.25 fps 6.0" Round Pipe n=0.013 L=15.0' S=0.0667 '/' Capacity=1.45 cfs 0.21 cfs0.21 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 116HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach P2: 8" Pipe [52] Hint: Inlet/Outlet conditions not evaluated Inflow Area = 6,492 sf, 18.21% Impervious, Inflow Depth = 3.15" for 10-YR event Inflow = 0.42 cfs @ 12.22 hrs, Volume= 1,706 cf Outflow = 0.42 cfs @ 12.22 hrs, Volume= 1,706 cf, Atten= 0%, Lag= 0.2 min Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Max. Velocity= 3.46 fps, Min. Travel Time= 0.3 min Avg. Velocity = 1.14 fps, Avg. Travel Time= 0.9 min Peak Storage= 8 cf @ 12.22 hrs Average Depth at Peak Storage= 0.25' , Surface Width= 0.65' Bank-Full Depth= 0.67' Flow Area= 0.3 sf, Capacity= 1.37 cfs 8.0" Round Pipe n= 0.013 Corrugated PE, smooth interior Length= 65.0' Slope= 0.0129 '/' Inlet Invert= 174.50', Outlet Invert= 173.66' NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 117HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Reach P2: 8" Pipe Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=6,492 sf Avg. Flow Depth=0.25' Max Vel=3.46 fps 8.0" Round Pipe n=0.013 L=65.0' S=0.0129 '/' Capacity=1.37 cfs 0.42 cfs0.42 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 118HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach P3: 4" Outlet Pipe [52] Hint: Inlet/Outlet conditions not evaluated Inflow Area = 2,880 sf, 39.41% Impervious, Inflow Depth = 3.53" for 10-YR event Inflow = 0.18 cfs @ 12.14 hrs, Volume= 846 cf Outflow = 0.18 cfs @ 12.15 hrs, Volume= 846 cf, Atten= 0%, Lag= 0.3 min Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Max. Velocity= 5.27 fps, Min. Travel Time= 0.4 min Avg. Velocity = 1.49 fps, Avg. Travel Time= 1.5 min Peak Storage= 5 cf @ 12.15 hrs Average Depth at Peak Storage= 0.12' , Surface Width= 0.42' Bank-Full Depth= 0.50' Flow Area= 0.2 sf, Capacity= 1.53 cfs 6.0" Round Pipe n= 0.013 Corrugated PE, smooth interior Length= 136.0' Slope= 0.0748 '/' Inlet Invert= 183.17', Outlet Invert= 173.00' NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 119HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Reach P3: 4" Outlet Pipe Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,880 sf Avg. Flow Depth=0.12' Max Vel=5.27 fps 6.0" Round Pipe n=0.013 L=136.0' S=0.0748 '/' Capacity=1.53 cfs 0.18 cfs0.18 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 120HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1: Surface 1 Inflow Area = 1,918 sf, 33.52% Impervious, Inflow Depth = 3.41" for 10-YR event Inflow = 0.17 cfs @ 12.13 hrs, Volume= 545 cf Outflow = 0.17 cfs @ 12.14 hrs, Volume= 545 cf, Atten= 1%, Lag= 0.7 min Primary = 0.17 cfs @ 12.14 hrs, Volume= 431 cf Routed to Pond 2 : Surface 2 Secondary = 0.00 cfs @ 12.14 hrs, Volume= 114 cf Routed to Pond 1S : Subsurface 1 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 183.33' @ 12.14 hrs Surf.Area= 42 sf Storage= 14 cf Plug-Flow detention time= 10.0 min calculated for 545 cf (100% of inflow) Center-of-Mass det. time= 10.0 min ( 822.1 - 812.0 ) Volume Invert Avail.Storage Storage Description #1 182.50' 23 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.50 2 0 0 183.00 17 5 5 183.51 55 18 23 Device Routing Invert Outlet Devices #1 Secondary 182.50'4.000 in/hr Exfiltration over Surface area #2 Primary 183.50'8.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 183.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 183.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.17 cfs @ 12.14 hrs HW=183.33' TW=182.83' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.13 cfs @ 2.15 fps) 4=Orifice/Grate (Orifice Controls 0.03 cfs @ 0.92 fps) Secondary OutFlow Max=0.00 cfs @ 12.14 hrs HW=183.33' TW=178.21' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.00 cfs) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 121HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 1: Surface 1 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=1,918 sf Peak Elev=183.33' Storage=14 cf 0.17 cfs0.17 cfs0.17 cfs 0.00 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 122HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1S: Subsurface 1 Inflow = 0.00 cfs @ 12.14 hrs, Volume= 114 cf Outflow = 0.00 cfs @ 12.17 hrs, Volume= 114 cf, Atten= 2%, Lag= 1.6 min Primary = 0.00 cfs @ 12.17 hrs, Volume= 114 cf Routed to Pond 2S : Subsurface 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 178.21' @ 12.17 hrs Surf.Area= 52 sf Storage= 1 cf Plug-Flow detention time= 7.8 min calculated for 114 cf (100% of inflow) Center-of-Mass det. time= 6.8 min ( 955.7 - 948.9 ) Volume Invert Avail.Storage Storage Description #1 178.16' 48 cf Custom Stage Data (Prismatic) Listed below (Recalc) 122 cf Overall - 1 cf Embedded = 121 cf x 40.0% Voids #2 178.17' 1 cf 4.0" Round Pipe Storage Inside #1 L= 11.8' 49 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 178.16 52 0 0 180.50 52 122 122 Device Routing Invert Outlet Devices #1 Primary 178.17'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.00 cfs @ 12.17 hrs HW=178.21' TW=177.73' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.00 cfs @ 0.67 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 123HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 1S: Subsurface 1 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.004 0.004 0.004 0.004 0.003 0.003 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Peak Elev=178.21' Storage=1 cf 0.00 cfs0.00 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 124HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2: Surface 2 Inflow Area = 2,082 sf, 30.88% Impervious, Inflow Depth = 2.71" for 10-YR event Inflow = 0.18 cfs @ 12.14 hrs, Volume= 470 cf Outflow = 0.17 cfs @ 12.15 hrs, Volume= 470 cf, Atten= 2%, Lag= 0.8 min Primary = 0.17 cfs @ 12.15 hrs, Volume= 352 cf Routed to Pond 3 : Surface 3 Secondary = 0.00 cfs @ 12.15 hrs, Volume= 118 cf Routed to Pond 2S : Subsurface 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 182.84' @ 12.15 hrs Surf.Area= 48 sf Storage= 19 cf Plug-Flow detention time= 11.5 min calculated for 470 cf (100% of inflow) Center-of-Mass det. time= 11.5 min ( 803.5 - 791.9 ) Volume Invert Avail.Storage Storage Description #1 182.00' 28 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.00 2 0 0 182.50 25 7 7 183.01 60 22 28 Device Routing Invert Outlet Devices #1 Secondary 182.00'4.000 in/hr Exfiltration over Surface area #2 Primary 183.00'8.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 182.50'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 182.75'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.17 cfs @ 12.15 hrs HW=182.84' TW=181.87' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.14 cfs @ 2.18 fps) 4=Orifice/Grate (Orifice Controls 0.03 cfs @ 0.94 fps) Secondary OutFlow Max=0.00 cfs @ 12.15 hrs HW=182.84' TW=177.73' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.00 cfs) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 125HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 2: Surface 2 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,082 sf Peak Elev=182.84' Storage=19 cf 0.18 cfs0.17 cfs0.17 cfs 0.00 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 126HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2S: Subsurface 2 Inflow = 0.01 cfs @ 12.16 hrs, Volume= 232 cf Outflow = 0.01 cfs @ 12.18 hrs, Volume= 232 cf, Atten= 1%, Lag= 1.3 min Primary = 0.01 cfs @ 12.18 hrs, Volume= 232 cf Routed to Pond 3S : Subsurface 3 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.73' @ 12.18 hrs Surf.Area= 57 sf Storage= 2 cf Plug-Flow detention time= 5.4 min calculated for 232 cf (100% of inflow) Center-of-Mass det. time= 4.8 min ( 963.1 - 958.2 ) Volume Invert Avail.Storage Storage Description #1 177.66' 53 cf Custom Stage Data (Prismatic) Listed below (Recalc) 133 cf Overall - 1 cf Embedded = 133 cf x 40.0% Voids #2 177.67' 1 cf 4.0" Round Pipe Storage Inside #1 L= 10.0' 54 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.66 57 0 0 180.00 57 133 133 Device Routing Invert Outlet Devices #1 Primary 177.67'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.18 hrs HW=177.73' TW=177.31' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.81 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 127HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 2S: Subsurface 2 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.009 0.009 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Peak Elev=177.73' Storage=2 cf 0.01 cfs0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 128HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 3: Surface 3 Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 2.18" for 10-YR event Inflow = 0.20 cfs @ 12.15 hrs, Volume= 458 cf Outflow = 0.20 cfs @ 12.15 hrs, Volume= 458 cf, Atten= 0%, Lag= 0.2 min Primary = 0.20 cfs @ 12.15 hrs, Volume= 334 cf Routed to Reach P1 : 4" Pipe Under Path Secondary = 0.01 cfs @ 12.15 hrs, Volume= 124 cf Routed to Pond 3S : Subsurface 3 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 181.87' @ 12.15 hrs Surf.Area= 57 sf Storage= 13 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 7.3 min ( 776.0 - 768.8 ) Volume Invert Avail.Storage Storage Description #1 181.50' 22 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 181.50 15 0 0 182.00 71 22 22 Device Routing Invert Outlet Devices #1 Secondary 181.50'4.000 in/hr Exfiltration over Surface area #2 Primary 181.80'12inch-Dome Grate Capacity Primary OutFlow Max=0.20 cfs @ 12.15 hrs HW=181.87' TW=177.31' (Dynamic Tailwater) 2=12inch-Dome Grate Capacity (Custom Controls 0.20 cfs) Secondary OutFlow Max=0.01 cfs @ 12.15 hrs HW=181.87' TW=177.31' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 129HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 3: Surface 3 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,519 sf Peak Elev=181.87' Storage=13 cf 0.20 cfs0.20 cfs0.20 cfs 0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 130HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 3S: Subsurface 3 [90] Warning: Qout>Qin may require smaller dt or Finer Routing Inflow = 0.01 cfs @ 12.18 hrs, Volume= 356 cf Outflow = 0.02 cfs @ 12.21 hrs, Volume= 356 cf, Atten= 0%, Lag= 2.3 min Primary = 0.02 cfs @ 12.21 hrs, Volume= 356 cf Routed to Reach P1 : 4" Pipe Under Path Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.32' @ 12.17 hrs Surf.Area= 71 sf Storage= 4 cf Plug-Flow detention time= 5.4 min calculated for 356 cf (100% of inflow) Center-of-Mass det. time= 4.9 min ( 937.4 - 932.5 ) Volume Invert Avail.Storage Storage Description #1 177.17' 66 cf Custom Stage Data (Prismatic) Listed below (Recalc) 165 cf Overall - 1 cf Embedded = 164 cf x 40.0% Voids #2 177.18' 1 cf 4.0" Round Pipe Storage Inside #1 L= 17.0' 67 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.17 71 0 0 179.50 71 165 165 Device Routing Invert Outlet Devices #1 Primary 177.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 12.21 hrs HW=177.31' TW=177.29' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 0.54 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 131HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 3S: Subsurface 3 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=177.32' Storage=4 cf 0.01 cfs 0.02 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 132HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 4: Surface 4 Inflow Area = 2,525 sf, 10.02% Impervious, Inflow Depth = 3.03" for 10-YR event Inflow = 0.20 cfs @ 12.13 hrs, Volume= 637 cf Outflow = 0.17 cfs @ 12.17 hrs, Volume= 637 cf, Atten= 15%, Lag= 2.3 min Primary = 0.16 cfs @ 12.17 hrs, Volume= 260 cf Routed to Pond 5 : Surface 5 Secondary = 0.02 cfs @ 12.17 hrs, Volume= 377 cf Routed to Pond 4S : Subsurface 4 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 183.32' @ 12.17 hrs Surf.Area= 186 sf Storage= 80 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 22.9 min ( 848.2 - 825.3 ) Volume Invert Avail.Storage Storage Description #1 182.50' 119 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.50 14 0 0 183.00 114 32 32 183.51 229 87 119 Device Routing Invert Outlet Devices #1 Secondary 182.50'4.000 in/hr Exfiltration over Surface area #2 Primary 183.50'7.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 183.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 183.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.16 cfs @ 12.17 hrs HW=183.32' TW=182.82' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.13 cfs @ 2.09 fps) 4=Orifice/Grate (Orifice Controls 0.03 cfs @ 0.85 fps) Secondary OutFlow Max=0.02 cfs @ 12.17 hrs HW=183.32' TW=178.26' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.02 cfs) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 133HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 4: Surface 4 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,525 sf Peak Elev=183.32' Storage=80 cf 0.20 cfs 0.17 cfs 0.16 cfs 0.02 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 134HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 4S: Subsurface 4 Inflow = 0.02 cfs @ 12.17 hrs, Volume= 377 cf Outflow = 0.02 cfs @ 12.23 hrs, Volume= 376 cf, Atten= 4%, Lag= 3.7 min Primary = 0.02 cfs @ 12.23 hrs, Volume= 376 cf Routed to Pond 5S : Subsurface 5 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 178.26' @ 12.23 hrs Surf.Area= 229 sf Storage= 9 cf Plug-Flow detention time= 15.4 min calculated for 376 cf (100% of inflow) Center-of-Mass det. time= 13.9 min ( 934.9 - 920.9 ) Volume Invert Avail.Storage Storage Description #1 178.17' 212 cf Custom Stage Data (Prismatic) Listed below (Recalc) 534 cf Overall - 3 cf Embedded = 530 cf x 40.0% Voids #2 178.18' 3 cf 4.0" Round Pipe Storage Inside #1 L= 36.0' 215 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 178.17 229 0 0 180.50 229 534 534 Device Routing Invert Outlet Devices #1 Primary 178.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 12.23 hrs HW=178.26' TW=177.78' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 0.98 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 135HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 4S: Subsurface 4 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=178.26' Storage=9 cf 0.02 cfs 0.02 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 136HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 5: Surface 5 Inflow Area = 2,697 sf, 10.53% Impervious, Inflow Depth = 1.36" for 10-YR event Inflow = 0.17 cfs @ 12.17 hrs, Volume= 305 cf Outflow = 0.16 cfs @ 12.18 hrs, Volume= 305 cf, Atten= 2%, Lag= 1.0 min Primary = 0.16 cfs @ 12.18 hrs, Volume= 244 cf Routed to Pond 6 : Surface 6 Secondary = 0.01 cfs @ 12.18 hrs, Volume= 61 cf Routed to Pond 5S : Subsurface 5 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 182.82' @ 12.18 hrs Surf.Area= 56 sf Storage= 24 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 7.8 min ( 762.3 - 754.5 ) Volume Invert Avail.Storage Storage Description #1 182.00' 36 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.00 2 0 0 182.50 36 10 10 183.01 68 27 36 Device Routing Invert Outlet Devices #1 Secondary 182.00'4.000 in/hr Exfiltration over Surface area #2 Primary 183.00'7.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 182.50'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 182.75'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.16 cfs @ 12.18 hrs HW=182.82' TW=182.33' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.13 cfs @ 2.11 fps) 4=Orifice/Grate (Orifice Controls 0.03 cfs @ 0.88 fps) Secondary OutFlow Max=0.01 cfs @ 12.18 hrs HW=182.82' TW=177.77' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 137HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 5: Surface 5 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,697 sf Peak Elev=182.82' Storage=24 cf 0.17 cfs0.16 cfs0.16 cfs 0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 138HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 5S: Subsurface 5 Inflow = 0.02 cfs @ 12.22 hrs, Volume= 437 cf Outflow = 0.02 cfs @ 12.24 hrs, Volume= 436 cf, Atten= 0%, Lag= 1.3 min Primary = 0.02 cfs @ 12.24 hrs, Volume= 436 cf Routed to Pond 6S : Subsurface 6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.78' @ 12.24 hrs Surf.Area= 68 sf Storage= 3 cf Plug-Flow detention time= 4.3 min calculated for 436 cf (100% of inflow) Center-of-Mass det. time= 3.8 min ( 925.8 - 922.0 ) Volume Invert Avail.Storage Storage Description #1 177.67' 63 cf Custom Stage Data (Prismatic) Listed below (Recalc) 158 cf Overall - 1 cf Embedded = 157 cf x 40.0% Voids #2 177.68' 1 cf 4.0" Round Pipe Storage Inside #1 L= 12.0' 64 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.67 68 0 0 180.00 68 158 158 Device Routing Invert Outlet Devices #1 Primary 177.68'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 12.24 hrs HW=177.78' TW=177.29' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 1.05 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 139HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 5S: Subsurface 5 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.024 0.023 0.022 0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=177.78' Storage=3 cf 0.02 cfs0.02 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 140HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 6: Surface 6 Inflow Area = 2,885 sf, 11.82% Impervious, Inflow Depth = 1.23" for 10-YR event Inflow = 0.17 cfs @ 12.18 hrs, Volume= 296 cf Outflow = 0.17 cfs @ 12.20 hrs, Volume= 296 cf, Atten= 2%, Lag= 1.0 min Primary = 0.16 cfs @ 12.20 hrs, Volume= 234 cf Routed to Pond 7 : Surface 7 Secondary = 0.01 cfs @ 12.20 hrs, Volume= 62 cf Routed to Pond 6S : Subsurface 6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 182.33' @ 12.20 hrs Surf.Area= 55 sf Storage= 26 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 7.7 min ( 762.8 - 755.0 ) Volume Invert Avail.Storage Storage Description #1 181.50' 37 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 181.50 2 0 0 182.00 40 11 11 182.51 63 26 37 Device Routing Invert Outlet Devices #1 Secondary 181.50'4.000 in/hr Exfiltration over Surface area #2 Primary 182.50'9.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 182.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 182.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.16 cfs @ 12.20 hrs HW=182.33' TW=181.34' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.13 cfs @ 2.14 fps) 4=Orifice/Grate (Orifice Controls 0.03 cfs @ 0.90 fps) Secondary OutFlow Max=0.01 cfs @ 12.20 hrs HW=182.33' TW=177.29' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 141HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 6: Surface 6 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,885 sf Peak Elev=182.33' Storage=26 cf 0.17 cfs0.17 cfs0.16 cfs 0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 142HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 6S: Subsurface 6 Inflow = 0.03 cfs @ 12.23 hrs, Volume= 498 cf Outflow = 0.03 cfs @ 12.25 hrs, Volume= 498 cf, Atten= 0%, Lag= 1.1 min Primary = 0.03 cfs @ 12.25 hrs, Volume= 498 cf Routed to Pond 7S : Subsurface 7 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.29' @ 12.25 hrs Surf.Area= 63 sf Storage= 3 cf Plug-Flow detention time= 4.1 min calculated for 498 cf (100% of inflow) Center-of-Mass det. time= 3.3 min ( 918.5 - 915.2 ) Volume Invert Avail.Storage Storage Description #1 177.17' 58 cf Custom Stage Data (Prismatic) Listed below (Recalc) 147 cf Overall - 1 cf Embedded = 146 cf x 40.0% Voids #2 177.18' 1 cf 4.0" Round Pipe Storage Inside #1 L= 13.0' 59 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.17 63 0 0 179.50 63 147 147 Device Routing Invert Outlet Devices #1 Primary 177.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.03 cfs @ 12.25 hrs HW=177.29' TW=176.55' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.03 cfs @ 1.11 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 143HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 6S: Subsurface 6 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 Peak Elev=177.29' Storage=3 cf 0.03 cfs0.03 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 144HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 7: Surface 7 Inflow Area = 3,343 sf, 13.79% Impervious, Inflow Depth = 1.29" for 10-YR event Inflow = 0.19 cfs @ 12.18 hrs, Volume= 360 cf Outflow = 0.18 cfs @ 12.21 hrs, Volume= 360 cf, Atten= 5%, Lag= 1.8 min Primary = 0.17 cfs @ 12.21 hrs, Volume= 243 cf Routed to Pond 8 : Surface 8 Secondary = 0.01 cfs @ 12.21 hrs, Volume= 117 cf Routed to Pond 7S : Subsurface 7 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 181.34' @ 12.21 hrs Surf.Area= 97 sf Storage= 50 cf Plug-Flow detention time= 18.5 min calculated for 360 cf (100% of inflow) Center-of-Mass det. time= 18.5 min ( 786.6 - 768.1 ) Volume Invert Avail.Storage Storage Description #1 180.00' 69 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 180.00 2 0 0 180.50 18 5 5 181.00 58 19 24 181.51 117 45 69 Device Routing Invert Outlet Devices #1 Secondary 180.00'4.000 in/hr Exfiltration over Surface area #2 Primary 181.50'10.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 181.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 181.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.17 cfs @ 12.21 hrs HW=181.34' TW=180.07' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.14 cfs @ 2.20 fps) 4=Orifice/Grate (Orifice Controls 0.04 cfs @ 0.97 fps) Secondary OutFlow Max=0.01 cfs @ 12.21 hrs HW=181.34' TW=176.62' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 145HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 7: Surface 7 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=3,343 sf Peak Elev=181.34' Storage=50 cf 0.19 cfs 0.18 cfs 0.17 cfs 0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 146HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 7S: Subsurface 7 [62] Hint: Exceeded Reach P1 OUTLET depth by 0.35' @ 12.19 hrs Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 6.22" for 10-YR event Inflow = 0.24 cfs @ 12.16 hrs, Volume= 1,305 cf Outflow = 0.23 cfs @ 12.18 hrs, Volume= 1,305 cf, Atten= 5%, Lag= 1.5 min Primary = 0.23 cfs @ 12.18 hrs, Volume= 1,305 cf Routed to Pond 8S : Subsurface 8 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 176.65' @ 12.18 hrs Surf.Area= 117 sf Storage= 24 cf Plug-Flow detention time= 4.2 min calculated for 1,305 cf (100% of inflow) Center-of-Mass det. time= 3.7 min ( 877.6 - 873.9 ) Volume Invert Avail.Storage Storage Description #1 176.17' 108 cf Custom Stage Data (Prismatic) Listed below (Recalc) 273 cf Overall - 2 cf Embedded = 271 cf x 40.0% Voids #2 176.18' 2 cf 4.0" Round Pipe Storage Inside #1 L= 21.0' 110 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 176.17 117 0 0 178.50 117 273 273 Device Routing Invert Outlet Devices #1 Primary 176.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.23 cfs @ 12.18 hrs HW=176.65' TW=175.14' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.23 cfs @ 2.65 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 147HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 7S: Subsurface 7 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.27 0.26 0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,519 sf Peak Elev=176.65' Storage=24 cf 0.24 cfs 0.23 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 148HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 8: Surface 8 Inflow Area = 3,973 sf, 13.21% Impervious, Inflow Depth = 1.21" for 10-YR event Inflow = 0.21 cfs @ 12.20 hrs, Volume= 402 cf Outflow = 0.20 cfs @ 12.22 hrs, Volume= 402 cf, Atten= 2%, Lag= 1.5 min Primary = 0.19 cfs @ 12.22 hrs, Volume= 192 cf Routed to Reach P2 : 8" Pipe Secondary = 0.02 cfs @ 12.22 hrs, Volume= 210 cf Routed to Pond 8S : Subsurface 8 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 180.07' @ 12.22 hrs Surf.Area= 164 sf Storage= 81 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 28.4 min ( 804.4 - 776.0 ) Volume Invert Avail.Storage Storage Description #1 179.00' 164 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 179.00 7 0 0 179.50 49 14 14 179.75 120 21 35 180.50 223 129 164 Device Routing Invert Outlet Devices #1 Secondary 179.00'4.000 in/hr Exfiltration over Surface area #2 Primary 180.00'12inch-Dome Grate Capacity Primary OutFlow Max=0.19 cfs @ 12.22 hrs HW=180.07' TW=174.75' (Dynamic Tailwater) 2=12inch-Dome Grate Capacity (Custom Controls 0.19 cfs) Secondary OutFlow Max=0.02 cfs @ 12.22 hrs HW=180.07' TW=175.16' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.02 cfs) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 149HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 8: Surface 8 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=3,973 sf Peak Elev=180.07' Storage=81 cf 0.21 cfs0.20 cfs 0.19 cfs 0.02 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 150HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 8S: Subsurface 8 Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 7.22" for 10-YR event Inflow = 0.25 cfs @ 12.18 hrs, Volume= 1,515 cf Outflow = 0.24 cfs @ 12.21 hrs, Volume= 1,514 cf, Atten= 4%, Lag= 1.7 min Primary = 0.24 cfs @ 12.21 hrs, Volume= 1,514 cf Routed to Reach P2 : 8" Pipe Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 175.16' @ 12.21 hrs Surf.Area= 120 sf Storage= 25 cf Plug-Flow detention time= 4.1 min calculated for 1,514 cf (100% of inflow) Center-of-Mass det. time= 3.5 min ( 878.6 - 875.1 ) Volume Invert Avail.Storage Storage Description #1 174.67' 111 cf Custom Stage Data (Prismatic) Listed below (Recalc) 280 cf Overall - 2 cf Embedded = 278 cf x 40.0% Voids #2 174.68' 2 cf 4.0" Round Pipe Storage Inside #1 L= 24.0' 113 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.67 120 0 0 177.00 120 280 280 Device Routing Invert Outlet Devices #1 Primary 174.68'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.24 cfs @ 12.21 hrs HW=175.16' TW=174.75' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.24 cfs @ 2.71 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 151HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 8S: Subsurface 8 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,519 sf Peak Elev=175.16' Storage=25 cf 0.25 cfs 0.24 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 152HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 9: Surface 9 Inflow Area = 3,923 sf, 27.20% Impervious, Inflow Depth = 3.31" for 10-YR event Inflow = 0.34 cfs @ 12.13 hrs, Volume= 1,083 cf Outflow = 0.34 cfs @ 12.13 hrs, Volume= 1,083 cf, Atten= 0%, Lag= 0.2 min Primary = 0.34 cfs @ 12.13 hrs, Volume= 833 cf Routed to Link 33L : On-site Closed Drainage Secondary = 0.01 cfs @ 12.13 hrs, Volume= 250 cf Routed to Pond 9S : Subsurface 9 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 174.36' @ 12.13 hrs Surf.Area= 61 sf Storage= 11 cf Plug-Flow detention time= 5.2 min calculated for 1,083 cf (100% of inflow) Center-of-Mass det. time= 5.2 min ( 820.7 - 815.5 ) Volume Invert Avail.Storage Storage Description #1 174.00' 86 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.00 1 0 0 175.00 170 86 86 Device Routing Invert Outlet Devices #1 Primary 174.25'12inch-Dome Grate Capacity #2 Secondary 174.00'4.000 in/hr Exfiltration over Surface area Primary OutFlow Max=0.34 cfs @ 12.13 hrs HW=174.36' TW=0.00' (Dynamic Tailwater) 1=12inch-Dome Grate Capacity (Custom Controls 0.34 cfs) Secondary OutFlow Max=0.01 cfs @ 12.13 hrs HW=174.36' TW=170.72' (Dynamic Tailwater) 2=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 153HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 9: Surface 9 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=3,923 sf Peak Elev=174.36' Storage=11 cf 0.34 cfs0.34 cfs0.34 cfs 0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 154HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 9S: Subsurface 9 Inflow = 0.01 cfs @ 12.13 hrs, Volume= 250 cf Outflow = 0.01 cfs @ 12.22 hrs, Volume= 248 cf, Atten= 10%, Lag= 5.2 min Primary = 0.01 cfs @ 12.22 hrs, Volume= 248 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 170.73' @ 12.22 hrs Surf.Area= 170 sf Storage= 9 cf Plug-Flow detention time= 38.2 min calculated for 248 cf (99% of inflow) Center-of-Mass det. time= 34.9 min ( 989.7 - 954.7 ) Volume Invert Avail.Storage Storage Description #1 170.67' 395 cf Custom Stage Data (Prismatic) Listed below (Recalc) 396 cf Overall - 1 cf Embedded = 395 cf #2 170.68' 1 cf 4.0" Round Pipe Storage Inside #1 L= 17.0' 396 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 170.67 170 0 0 173.00 170 396 396 Device Routing Invert Outlet Devices #1 Primary 170.68'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.22 hrs HW=170.73' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.72 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 155HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 9S: Subsurface 9 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Peak Elev=170.73' Storage=9 cf 0.01 cfs 0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 156HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 10: Surface 10 Inflow Area = 3,386 sf, 9.57% Impervious, Inflow Depth = 3.03" for 10-YR event Inflow = 0.27 cfs @ 12.13 hrs, Volume= 854 cf Outflow = 0.27 cfs @ 12.14 hrs, Volume= 854 cf, Atten= 1%, Lag= 0.5 min Primary = 0.26 cfs @ 12.14 hrs, Volume= 442 cf Routed to Link 33L : On-site Closed Drainage Secondary = 0.01 cfs @ 12.14 hrs, Volume= 412 cf Routed to Pond 10S : Subsurface 10 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 173.34' @ 12.14 hrs Surf.Area= 118 sf Storage= 32 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 11.0 min ( 836.3 - 825.3 ) Volume Invert Avail.Storage Storage Description #1 173.00' 142 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 173.00 68 0 0 174.00 215 142 142 Device Routing Invert Outlet Devices #1 Primary 173.25'12inch-Dome Grate Capacity #2 Secondary 173.00'4.000 in/hr Exfiltration over Surface area Primary OutFlow Max=0.26 cfs @ 12.14 hrs HW=173.34' TW=0.00' (Dynamic Tailwater) 1=12inch-Dome Grate Capacity (Custom Controls 0.26 cfs) Secondary OutFlow Max=0.01 cfs @ 12.14 hrs HW=173.34' TW=168.74' (Dynamic Tailwater) 2=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 157HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 10: Surface 10 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=3,386 sf Peak Elev=173.34' Storage=32 cf 0.27 cfs0.27 cfs 0.26 cfs 0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 158HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 10S: Subsurface 10 Inflow = 0.01 cfs @ 12.14 hrs, Volume= 412 cf Outflow = 0.01 cfs @ 12.18 hrs, Volume= 411 cf, Atten= 1%, Lag= 2.5 min Primary = 0.01 cfs @ 12.18 hrs, Volume= 411 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 168.74' @ 12.18 hrs Surf.Area= 215 sf Storage= 6 cf Plug-Flow detention time= 12.2 min calculated for 411 cf (100% of inflow) Center-of-Mass det. time= 11.3 min ( 948.2 - 936.9 ) Volume Invert Avail.Storage Storage Description #1 168.67' 200 cf Custom Stage Data (Prismatic) Listed below (Recalc) 501 cf Overall - 2 cf Embedded = 499 cf x 40.0% Voids #2 168.68' 2 cf 4.0" Round Pipe Storage Inside #1 L= 18.0' 201 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 168.67 215 0 0 171.00 215 501 501 Device Routing Invert Outlet Devices #1 Primary 168.68'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.18 hrs HW=168.74' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.83 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 159HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 10S: Subsurface 10 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.012 0.011 0.011 0.01 0.01 0.009 0.009 0.008 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Peak Elev=168.74' Storage=6 cf 0.01 cfs0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 160HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 11: Surface 11 Inflow Area = 2,880 sf, 39.41% Impervious, Inflow Depth = 3.53" for 10-YR event Inflow = 0.19 cfs @ 12.13 hrs, Volume= 846 cf Outflow = 0.19 cfs @ 12.14 hrs, Volume= 846 cf, Atten= 1%, Lag= 0.5 min Primary = 0.18 cfs @ 12.14 hrs, Volume= 267 cf Routed to Reach P3 : 4" Outlet Pipe Secondary = 0.01 cfs @ 12.14 hrs, Volume= 579 cf Routed to Pond 11S : Subsurface 11 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 185.37' @ 12.14 hrs Surf.Area= 113 sf Storage= 51 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 41.8 min ( 1,034.6 - 992.8 ) Volume Invert Avail.Storage Storage Description #1 184.50' 284 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 184.50 23 0 0 185.00 56 20 20 186.00 211 134 153 186.50 310 130 284 Device Routing Invert Outlet Devices #1 Secondary 184.50'4.000 in/hr Exfiltration over Surface area #2 Primary 185.30'12inch-Dome Grate Capacity Primary OutFlow Max=0.18 cfs @ 12.14 hrs HW=185.37' TW=183.29' (Dynamic Tailwater) 2=12inch-Dome Grate Capacity (Custom Controls 0.18 cfs) Secondary OutFlow Max=0.01 cfs @ 12.14 hrs HW=185.37' TW=183.29' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 161HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 11: Surface 11 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,880 sf Peak Elev=185.37' Storage=51 cf 0.19 cfs0.19 cfs 0.18 cfs 0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 162HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 11S: Subsurface 11 [90] Warning: Qout>Qin may require smaller dt or Finer Routing Inflow = 0.01 cfs @ 12.14 hrs, Volume= 579 cf Outflow = 0.02 cfs @ 12.22 hrs, Volume= 579 cf, Atten= 0%, Lag= 5.1 min Primary = 0.02 cfs @ 12.22 hrs, Volume= 579 cf Routed to Reach P3 : 4" Outlet Pipe Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 183.29' @ 12.17 hrs Surf.Area= 310 sf Storage= 15 cf Plug-Flow detention time= 19.2 min calculated for 579 cf (100% of inflow) Center-of-Mass det. time= 18.8 min ( 1,189.7 - 1,170.9 ) Volume Invert Avail.Storage Storage Description #1 183.17' 289 cf Custom Stage Data (Prismatic) Listed below (Recalc) 722 cf Overall x 40.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 183.17 310 0 0 185.50 310 722 722 Device Routing Invert Outlet Devices #1 Primary 183.17'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 12.22 hrs HW=183.28' TW=183.27' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 0.64 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 163HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 11S: Subsurface 11 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=183.29' Storage=15 cf 0.01 cfs 0.02 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 164HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 29P: Landscape Filter Inflow Area = 5,639 sf,100.00% Impervious, Inflow Depth = 4.61" for 10-YR event Inflow = 0.48 cfs @ 12.13 hrs, Volume= 2,166 cf Outflow = 0.42 cfs @ 12.18 hrs, Volume= 2,162 cf, Atten= 12%, Lag= 3.1 min Primary = 0.42 cfs @ 12.18 hrs, Volume= 2,162 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 170.96' @ 12.18 hrs Surf.Area= 1,000 sf Storage= 182 cf Plug-Flow detention time= 23.8 min calculated for 2,162 cf (100% of inflow) Center-of-Mass det. time= 22.4 min ( 772.4 - 750.0 ) Volume Invert Avail.Storage Storage Description #1 170.50' 1,000 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 170.50 1,000 0.0 0 0 170.51 1,000 40.0 4 4 171.50 1,000 40.0 396 400 171.51 1,000 20.0 2 402 174.50 1,000 20.0 598 1,000 Device Routing Invert Outlet Devices #1 Primary 170.51'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.42 cfs @ 12.18 hrs HW=170.96' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.42 cfs @ 2.27 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 165HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 29P: Landscape Filter Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.52 0.5 0.48 0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=5,639 sf Peak Elev=170.96' Storage=182 cf 0.48 cfs 0.42 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 166HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 30P: Porous Pavers Inflow Area = 443 sf, 33.86% Impervious, Inflow Depth = 3.41" for 10-YR event Inflow = 0.00 cfs @ 20.97 hrs, Volume= 126 cf Outflow = 0.00 cfs @ 21.10 hrs, Volume= 125 cf, Atten= 0%, Lag= 7.7 min Primary = 0.00 cfs @ 21.10 hrs, Volume= 125 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 174.96' @ 21.10 hrs Surf.Area= 150 sf Storage= 2 cf Plug-Flow detention time= 25.4 min calculated for 125 cf (100% of inflow) Center-of-Mass det. time= 19.2 min ( 1,453.7 - 1,434.6 ) Volume Invert Avail.Storage Storage Description #1 174.92' 135 cf 31" section beneath paver (Prismatic) Listed below (Recalc) 387 cf Overall - 2 cf Embedded = 385 cf x 35.0% Voids #2 174.93' 2 cf 4.0" Round Pipe Storage Inside #1 L= 28.0' 137 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.92 150 0 0 177.50 150 387 387 Device Routing Invert Outlet Devices #1 Primary 174.93'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.00 cfs @ 21.10 hrs HW=174.96' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.00 cfs @ 0.62 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 167HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 30P: Porous Pavers Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Inflow Area=443 sf Peak Elev=174.96' Storage=2 cf 0.00 cfs0.00 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 168HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 31P: Distribution Pipes [57] Hint: Peaked at 173.85' (Flood elevation advised) Inflow Area = 2,750 sf,100.00% Impervious, Inflow Depth = 4.70" for 10-YR event Inflow = 0.30 cfs @ 12.13 hrs, Volume= 1,078 cf Outflow = 0.30 cfs @ 12.13 hrs, Volume= 1,078 cf, Atten= 0%, Lag= 0.0 min Primary = 0.23 cfs @ 12.13 hrs, Volume= 1,057 cf Routed to Pond 29P : Landscape Filter Secondary = 0.06 cfs @ 12.13 hrs, Volume= 21 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 173.85' @ 12.13 hrs Device Routing Invert Outlet Devices #1 Secondary 173.70'6.0" Vert. Overflow C= 0.600 Limited to weir flow at low heads #2 Primary 173.37'4.0" Vert. Distribution Pipe C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.23 cfs @ 12.13 hrs HW=173.85' TW=170.93' (Dynamic Tailwater) 2=Distribution Pipe (Orifice Controls 0.23 cfs @ 2.68 fps) Secondary OutFlow Max=0.06 cfs @ 12.13 hrs HW=173.85' TW=0.00' (Dynamic Tailwater) 1=Overflow (Orifice Controls 0.06 cfs @ 1.31 fps) Pond 31P: Distribution Pipes Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,750 sf Peak Elev=173.85' 0.30 cfs0.30 cfs 0.23 cfs 0.06 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 169HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 33P: Distribution Pipes [57] Hint: Peaked at 173.88' (Flood elevation advised) Inflow Area = 2,889 sf,100.00% Impervious, Inflow Depth = 4.70" for 10-YR event Inflow = 0.31 cfs @ 12.13 hrs, Volume= 1,132 cf Outflow = 0.31 cfs @ 12.13 hrs, Volume= 1,132 cf, Atten= 0%, Lag= 0.0 min Primary = 0.25 cfs @ 12.13 hrs, Volume= 1,109 cf Routed to Pond 29P : Landscape Filter Secondary = 0.07 cfs @ 12.13 hrs, Volume= 23 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 173.88' @ 12.13 hrs Device Routing Invert Outlet Devices #1 Secondary 173.70'4.0" Vert. Overflow C= 0.600 Limited to weir flow at low heads #2 Primary 173.37'4.0" Vert. Distribution Pipe C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.25 cfs @ 12.13 hrs HW=173.88' TW=170.93' (Dynamic Tailwater) 2=Distribution Pipe (Orifice Controls 0.25 cfs @ 2.81 fps) Secondary OutFlow Max=0.07 cfs @ 12.13 hrs HW=173.88' TW=0.00' (Dynamic Tailwater) 1=Overflow (Orifice Controls 0.07 cfs @ 1.43 fps) Pond 33P: Distribution Pipes Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,889 sf Peak Elev=173.88' 0.31 cfs0.31 cfs 0.25 cfs 0.07 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 170HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond PN: Porous Pavers Inflow Area = 676 sf, 77.51% Impervious, Inflow Depth = 4.25" for 10-YR event Inflow = 0.01 cfs @ 20.96 hrs, Volume= 239 cf Outflow = 0.01 cfs @ 21.00 hrs, Volume= 238 cf, Atten= 0%, Lag= 2.4 min Primary = 0.01 cfs @ 21.00 hrs, Volume= 238 cf Routed to Pond 11 : Surface 11 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 188.48' @ 21.00 hrs Surf.Area= 464 sf Storage= 10 cf Plug-Flow detention time= 56.7 min calculated for 238 cf (99% of inflow) Center-of-Mass det. time= 47.2 min ( 1,446.7 - 1,399.5 ) Volume Invert Avail.Storage Storage Description #1 188.42' 417 cf 31" section beneath pavers (Prismatic) Listed below (Recalc) 1,197 cf Overall - 6 cf Embedded = 1,191 cf x 35.0% Voids #2 188.43' 6 cf 4.0" Round Pipe Storage Inside #1 L= 67.0' 423 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 188.42 464 0 0 191.00 464 1,197 1,197 Device Routing Invert Outlet Devices #1 Primary 188.43'4.0" Round Culvert L= 7.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 188.43' / 186.00' S= 0.3471 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.09 sf Primary OutFlow Max=0.01 cfs @ 21.00 hrs HW=188.48' TW=185.23' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.01 cfs @ 0.61 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 171HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond PN: Porous Pavers Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Inflow Area=676 sf Peak Elev=188.48' Storage=10 cf 4.0" Round Culvert n=0.013 L=7.0' S=0.3471 '/' 0.01 cfs0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 172HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond PS: Porous Pavers Inflow Area = 2,379 sf, 11.60% Impervious, Inflow Depth = 3.03" for 10-YR event Inflow = 0.01 cfs @ 21.71 hrs, Volume= 600 cf Outflow = 0.01 cfs @ 21.72 hrs, Volume= 599 cf, Atten= 0%, Lag= 0.7 min Primary = 0.01 cfs @ 21.72 hrs, Volume= 599 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 175.00' @ 21.72 hrs Surf.Area= 248 sf Storage= 8 cf Plug-Flow detention time= 15.8 min calculated for 599 cf (100% of inflow) Center-of-Mass det. time= 13.4 min ( 1,461.5 - 1,448.1 ) Volume Invert Avail.Storage Storage Description #1 174.92' 223 cf 31" section beneath paver (Prismatic) Listed below (Recalc) 640 cf Overall - 2 cf Embedded = 637 cf x 35.0% Voids #2 174.93' 2 cf 4.0" Round Pipe Storage Inside #1 L= 28.0' 226 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.92 248 0 0 177.50 248 640 640 Device Routing Invert Outlet Devices #1 Primary 174.93'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 21.72 hrs HW=175.00' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.92 fps) NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 173HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond PS: Porous Pavers Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Inflow Area=2,379 sf Peak Elev=175.00' Storage=8 cf 0.01 cfs0.01 cfs NOAA 24-hr D 10-YR Rainfall=4.94"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 174HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Link 33L: On-site Closed Drainage Inflow Area = 27,635 sf, 35.49% Impervious, Inflow Depth = 3.48" for 10-YR event Inflow = 1.71 cfs @ 12.14 hrs, Volume= 8,007 cf Primary = 1.71 cfs @ 12.14 hrs, Volume= 8,007 cf, Atten= 0%, Lag= 0.0 min Routed to Reach DP-PR : Proposed Site Primary outflow = Inflow, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs Link 33L: On-site Closed Drainage Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)1 0 Inflow Area=27,635 sf 1.71 cfs1.71 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 175HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Time span=0.00-100.00 hrs, dt=0.01 hrs, 10001 points x 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=1,918 sf 33.52% Impervious Runoff Depth=4.50"Subcatchment PR1: Basin 1 Tc=6.0 min CN=86 Runoff=0.22 cfs 720 cf Runoff Area=3,386 sf 9.57% Impervious Runoff Depth=4.08"Subcatchment PR10: Basin 10 Tc=6.0 min CN=82 Runoff=0.37 cfs 1,151 cf Runoff Area=2,204 sf 27.72% Impervious Runoff Depth=4.40"Subcatchment PR11: Basin 11 Tc=6.0 min CN=85 Runoff=0.25 cfs 808 cf Runoff Area=2,493 sf 1.36% Impervious Runoff Depth=3.87"Subcatchment PR12: West site to Area Drain Tc=6.0 min CN=80 Runoff=0.26 cfs 804 cf Runoff Area=2,379 sf 11.60% Impervious Runoff Depth=4.08"Subcatchment PR13: Pavers front Tc=674.0 min CN=82 Runoff=0.02 cfs 809 cf Runoff Area=676 sf 77.51% Impervious Runoff Depth=5.40"Subcatchment PR14: Pavers North Tc=674.0 min CN=94 Runoff=0.01 cfs 304 cf Runoff Area=2,750 sf 100.00% Impervious Runoff Depth=5.86"Subcatchment PR15a: Roof West Tc=6.0 min CN=98 Runoff=0.37 cfs 1,343 cf Runoff Area=2,889 sf 100.00% Impervious Runoff Depth=5.86"Subcatchment PR15b: Roof East Tc=6.0 min CN=98 Runoff=0.39 cfs 1,411 cf Runoff Area=13,694 sf 44.87% Impervious Runoff Depth=4.72"Subcatchment PR16: Remainder of site Tc=6.0 min CN=88 Runoff=1.65 cfs 5,389 cf Runoff Area=443 sf 33.86% Impervious Runoff Depth=4.50"Subcatchment PR17: Pavers path Tc=674.0 min CN=86 Runoff=0.00 cfs 166 cf Runoff Area=164 sf 0.00% Impervious Runoff Depth=3.87"Subcatchment PR2: Basin 2 Tc=6.0 min CN=80 Runoff=0.02 cfs 53 cf Runoff Area=437 sf 3.20% Impervious Runoff Depth=3.97"Subcatchment PR3: Basin 3 Tc=6.0 min CN=81 Runoff=0.05 cfs 145 cf Runoff Area=2,525 sf 10.02% Impervious Runoff Depth=4.08"Subcatchment PR4: Basin 4 Tc=6.0 min CN=82 Runoff=0.27 cfs 858 cf Runoff Area=172 sf 18.02% Impervious Runoff Depth=4.18"Subcatchment PR5: Basin 5 Tc=6.0 min CN=83 Runoff=0.02 cfs 60 cf Runoff Area=188 sf 30.32% Impervious Runoff Depth=4.40"Subcatchment PR6: Basin 6 Tc=6.0 min CN=85 Runoff=0.02 cfs 69 cf Runoff Area=458 sf 26.20% Impervious Runoff Depth=4.40"Subcatchment PR7: Basin 7 Tc=6.0 min CN=85 Runoff=0.05 cfs 168 cf NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 176HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Runoff Area=630 sf 10.16% Impervious Runoff Depth=4.08"Subcatchment PR8: Basin 8 Tc=6.0 min CN=82 Runoff=0.07 cfs 214 cf Runoff Area=3,923 sf 27.20% Impervious Runoff Depth=4.40"Subcatchment PR9: Basin 9 Tc=6.0 min CN=85 Runoff=0.45 cfs 1,437 cf Inflow=4.09 cfs 15,896 cfReach DP-PR: Proposed Site Outflow=4.09 cfs 15,896 cf Avg. Flow Depth=0.15' Max Vel=5.68 fps Inflow=0.28 cfs 917 cfReach P1: 4" Pipe Under Path 6.0" Round Pipe n=0.013 L=15.0' S=0.0667 '/' Capacity=1.45 cfs Outflow=0.28 cfs 917 cf Avg. Flow Depth=0.30' Max Vel=3.76 fps Inflow=0.57 cfs 2,284 cfReach P2: 8" Pipe 8.0" Round Pipe n=0.013 L=65.0' S=0.0129 '/' Capacity=1.37 cfs Outflow=0.57 cfs 2,284 cf Avg. Flow Depth=0.13' Max Vel=5.69 fps Inflow=0.24 cfs 1,110 cfReach P3: 4" Outlet Pipe 6.0" Round Pipe n=0.013 L=136.0' S=0.0748 '/' Capacity=1.53 cfs Outflow=0.24 cfs 1,110 cf Peak Elev=183.38' Storage=17 cf Inflow=0.22 cfs 720 cfPond 1: Surface 1 Primary=0.22 cfs 596 cf Secondary=0.00 cfs 124 cf Outflow=0.22 cfs 720 cf Peak Elev=178.21' Storage=1 cf Inflow=0.00 cfs 124 cfPond 1S: Subsurface 1 Outflow=0.00 cfs 124 cf Peak Elev=182.89' Storage=22 cf Inflow=0.23 cfs 649 cfPond 2: Surface 2 Primary=0.22 cfs 506 cf Secondary=0.00 cfs 142 cf Outflow=0.23 cfs 649 cf Peak Elev=177.73' Storage=2 cf Inflow=0.01 cfs 266 cfPond 2S: Subsurface 2 Outflow=0.01 cfs 266 cf Peak Elev=181.89' Storage=14 cf Inflow=0.27 cfs 651 cfPond 3: Surface 3 Primary=0.26 cfs 493 cf Secondary=0.01 cfs 158 cf Outflow=0.27 cfs 651 cf Peak Elev=177.33' Storage=5 cf Inflow=0.01 cfs 424 cfPond 3S: Subsurface 3 Outflow=0.02 cfs 424 cf Peak Elev=183.39' Storage=93 cf Inflow=0.27 cfs 858 cfPond 4: Surface 4 Primary=0.22 cfs 404 cf Secondary=0.02 cfs 455 cf Outflow=0.24 cfs 858 cf Peak Elev=178.27' Storage=9 cf Inflow=0.02 cfs 455 cfPond 4S: Subsurface 4 Outflow=0.02 cfs 454 cf Peak Elev=182.89' Storage=28 cf Inflow=0.24 cfs 464 cfPond 5: Surface 5 Primary=0.23 cfs 386 cf Secondary=0.01 cfs 77 cf Outflow=0.23 cfs 464 cf Peak Elev=177.78' Storage=3 cf Inflow=0.02 cfs 531 cfPond 5S: Subsurface 5 Outflow=0.02 cfs 531 cf Peak Elev=182.40' Storage=30 cf Inflow=0.24 cfs 455 cfPond 6: Surface 6 Primary=0.23 cfs 378 cf Secondary=0.01 cfs 77 cf Outflow=0.24 cfs 455 cf NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 177HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Peak Elev=177.29' Storage=3 cf Inflow=0.03 cfs 608 cfPond 6S: Subsurface 6 Outflow=0.03 cfs 608 cf Peak Elev=181.42' Storage=58 cf Inflow=0.27 cfs 546 cfPond 7: Surface 7 Primary=0.25 cfs 403 cf Secondary=0.01 cfs 143 cf Outflow=0.26 cfs 546 cf Peak Elev=176.83' Storage=32 cf Inflow=0.31 cfs 1,667 cfPond 7S: Subsurface 7 Outflow=0.29 cfs 1,667 cf Peak Elev=180.10' Storage=85 cf Inflow=0.30 cfs 617 cfPond 8: Surface 8 Primary=0.28 cfs 368 cf Secondary=0.02 cfs 249 cf Outflow=0.30 cfs 617 cf Peak Elev=175.33' Storage=33 cf Inflow=0.31 cfs 1,916 cfPond 8S: Subsurface 8 Outflow=0.29 cfs 1,916 cf Peak Elev=174.38' Storage=12 cf Inflow=0.45 cfs 1,437 cfPond 9: Surface 9 Primary=0.44 cfs 1,170 cf Secondary=0.01 cfs 267 cf Outflow=0.45 cfs 1,437 cf Peak Elev=170.73' Storage=10 cf Inflow=0.01 cfs 267 cfPond 9S: Subsurface 9 Outflow=0.01 cfs 265 cf Peak Elev=173.36' Storage=34 cf Inflow=0.37 cfs 1,151 cfPond 10: Surface 10 Primary=0.35 cfs 668 cf Secondary=0.01 cfs 483 cf Outflow=0.36 cfs 1,151 cf Peak Elev=168.74' Storage=6 cf Inflow=0.01 cfs 483 cfPond 10S: Subsurface 10 Outflow=0.01 cfs 482 cf Peak Elev=185.38' Storage=53 cf Inflow=0.25 cfs 1,110 cfPond 11: Surface 11 Primary=0.24 cfs 439 cf Secondary=0.01 cfs 671 cf Outflow=0.25 cfs 1,110 cf Peak Elev=183.31' Storage=17 cf Inflow=0.01 cfs 671 cfPond 11S: Subsurface 11 Outflow=0.02 cfs 671 cf Peak Elev=170.99' Storage=198 cf Inflow=0.52 cfs 2,658 cfPond 29P: Landscape Filter Outflow=0.46 cfs 2,653 cf Peak Elev=174.97' Storage=3 cf Inflow=0.00 cfs 166 cfPond 30P: Porous Pavers Outflow=0.00 cfs 166 cf Peak Elev=173.90' Inflow=0.37 cfs 1,343 cfPond 31P: Distribution Pipes Primary=0.25 cfs 1,297 cf Secondary=0.11 cfs 47 cf Outflow=0.37 cfs 1,343 cf Peak Elev=173.95' Inflow=0.39 cfs 1,411 cfPond 33P: Distribution Pipes Primary=0.27 cfs 1,361 cf Secondary=0.12 cfs 50 cf Outflow=0.39 cfs 1,411 cf Peak Elev=188.49' Storage=11 cf Inflow=0.01 cfs 304 cfPond PN: Porous Pavers 4.0" Round Culvert n=0.013 L=7.0' S=0.3471 '/' Outflow=0.01 cfs 302 cf Peak Elev=175.02' Storage=9 cf Inflow=0.02 cfs 809 cfPond PS: Porous Pavers Outflow=0.02 cfs 808 cf NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 178HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Inflow=2.45 cfs 10,508 cfLink 33L: On-site Closed Drainage Primary=2.45 cfs 10,508 cf Total Runoff Area = 41,329 sf Runoff Volume = 15,909 cf Average Runoff Depth = 4.62" 61.40% Pervious = 25,378 sf 38.60% Impervious = 15,951 sf NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 179HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR1: Basin 1 Runoff = 0.22 cfs @ 12.13 hrs, Volume= 720 cf, Depth= 4.50" Routed to Pond 1 : Surface 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 643 98 Site Impervious 1,275 80 >75% Grass cover, Good, HSG D 1,918 86 Weighted Average 1,275 66.48% Pervious Area 643 33.52% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR1: Basin 1 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=1,918 sf Runoff Volume=720 cf Runoff Depth=4.50" Tc=6.0 min CN=86 0.22 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 180HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR10: Basin 10 Runoff = 0.37 cfs @ 12.13 hrs, Volume= 1,151 cf, Depth= 4.08" Routed to Pond 10 : Surface 10 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 324 98 Site Impervious 3,062 80 >75% Grass cover, Good, HSG D 3,386 82 Weighted Average 3,062 90.43% Pervious Area 324 9.57% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR10: Basin 10 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=3,386 sf Runoff Volume=1,151 cf Runoff Depth=4.08" Tc=6.0 min CN=82 0.37 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 181HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR11: Basin 11 Runoff = 0.25 cfs @ 12.13 hrs, Volume= 808 cf, Depth= 4.40" Routed to Pond 11 : Surface 11 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 611 98 Site Impervious 1,593 80 >75% Grass cover, Good, HSG D 2,204 85 Weighted Average 1,593 72.28% Pervious Area 611 27.72% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR11: Basin 11 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=2,204 sf Runoff Volume=808 cf Runoff Depth=4.40" Tc=6.0 min CN=85 0.25 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 182HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR12: West site to Area Drain Runoff = 0.26 cfs @ 12.13 hrs, Volume= 804 cf, Depth= 3.87" Routed to Link 33L : On-site Closed Drainage Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 34 98 Site Impervious 2,459 80 >75% Grass cover, Good, HSG D 2,493 80 Weighted Average 2,459 98.64% Pervious Area 34 1.36% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR12: West site to Area Drain Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=2,493 sf Runoff Volume=804 cf Runoff Depth=3.87" Tc=6.0 min CN=80 0.26 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 183HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR13: Pavers front Runoff = 0.02 cfs @ 20.97 hrs, Volume= 809 cf, Depth= 4.08" Routed to Pond PS : Porous Pavers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 28 98 Site Impervious * 248 98 Permeable Pavers 2,103 80 >75% Grass cover, Good, HSG D 2,379 82 Weighted Average 2,103 88.40% Pervious Area 276 11.60% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 674.0 Direct Entry, Paver Tc Subcatchment PR13: Pavers front Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=2,379 sf Runoff Volume=809 cf Runoff Depth=4.08" Tc=674.0 min CN=82 0.02 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 184HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR14: Pavers North Runoff = 0.01 cfs @ 20.23 hrs, Volume= 304 cf, Depth= 5.40" Routed to Pond PN : Porous Pavers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 60 98 Site Impervious * 464 98 Porous Pavers 152 80 >75% Grass cover, Good, HSG D 676 94 Weighted Average 152 22.49% Pervious Area 524 77.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 674.0 Direct Entry, Pavers Tc Subcatchment PR14: Pavers North Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.007 0.007 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=676 sf Runoff Volume=304 cf Runoff Depth=5.40" Tc=674.0 min CN=94 0.01 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 185HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR15a: Roof West Runoff = 0.37 cfs @ 12.13 hrs, Volume= 1,343 cf, Depth= 5.86" Routed to Pond 31P : Distribution Pipes Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 2,750 98 Roof 2,750 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR15a: Roof West Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=2,750 sf Runoff Volume=1,343 cf Runoff Depth=5.86" Tc=6.0 min CN=98 0.37 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 186HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR15b: Roof East Runoff = 0.39 cfs @ 12.13 hrs, Volume= 1,411 cf, Depth= 5.86" Routed to Pond 33P : Distribution Pipes Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 2,889 98 Roof 2,889 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR15b: Roof East Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=2,889 sf Runoff Volume=1,411 cf Runoff Depth=5.86" Tc=6.0 min CN=98 0.39 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 187HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR16: Remainder of site Runoff = 1.65 cfs @ 12.13 hrs, Volume= 5,389 cf, Depth= 4.72" Routed to Reach DP-PR : Proposed Site Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 6,144 98 Site Impervious 7,550 80 >75% Grass cover, Good, HSG D 13,694 88 Weighted Average 7,550 55.13% Pervious Area 6,144 44.87% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR16: Remainder of site Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)1 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=13,694 sf Runoff Volume=5,389 cf Runoff Depth=4.72" Tc=6.0 min CN=88 1.65 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 188HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR17: Pavers path Runoff = 0.00 cfs @ 20.97 hrs, Volume= 166 cf, Depth= 4.50" Routed to Pond 30P : Porous Pavers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 150 98 Permeable Pavers 293 80 >75% Grass cover, Good, HSG D 443 86 Weighted Average 293 66.14% Pervious Area 150 33.86% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 674.0 Direct Entry, Paver Tc Subcatchment PR17: Pavers path Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.004 0.004 0.004 0.003 0.003 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=443 sf Runoff Volume=166 cf Runoff Depth=4.50" Tc=674.0 min CN=86 0.00 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 189HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR2: Basin 2 Runoff = 0.02 cfs @ 12.13 hrs, Volume= 53 cf, Depth= 3.87" Routed to Pond 2 : Surface 2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description 164 80 >75% Grass cover, Good, HSG D 164 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR2: Basin 2 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=164 sf Runoff Volume=53 cf Runoff Depth=3.87" Tc=6.0 min CN=80 0.02 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 190HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR3: Basin 3 Runoff = 0.05 cfs @ 12.13 hrs, Volume= 145 cf, Depth= 3.97" Routed to Pond 3 : Surface 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 14 98 Site Impervious 423 80 >75% Grass cover, Good, HSG D 437 81 Weighted Average 423 96.80% Pervious Area 14 3.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR3: Basin 3 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.05 0.048 0.046 0.044 0.042 0.04 0.038 0.036 0.034 0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=437 sf Runoff Volume=145 cf Runoff Depth=3.97" Tc=6.0 min CN=81 0.05 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 191HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR4: Basin 4 Runoff = 0.27 cfs @ 12.13 hrs, Volume= 858 cf, Depth= 4.08" Routed to Pond 4 : Surface 4 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 253 98 Impervious 2,272 80 >75% Grass cover, Good, HSG D 2,525 82 Weighted Average 2,272 89.98% Pervious Area 253 10.02% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR4: Basin 4 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=2,525 sf Runoff Volume=858 cf Runoff Depth=4.08" Tc=6.0 min CN=82 0.27 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 192HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR5: Basin 5 Runoff = 0.02 cfs @ 12.13 hrs, Volume= 60 cf, Depth= 4.18" Routed to Pond 5 : Surface 5 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 31 98 Site Impervious 141 80 >75% Grass cover, Good, HSG D 172 83 Weighted Average 141 81.98% Pervious Area 31 18.02% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR5: Basin 5 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=172 sf Runoff Volume=60 cf Runoff Depth=4.18" Tc=6.0 min CN=83 0.02 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 193HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR6: Basin 6 Runoff = 0.02 cfs @ 12.13 hrs, Volume= 69 cf, Depth= 4.40" Routed to Pond 6 : Surface 6 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 57 98 Site Impervious 131 80 >75% Grass cover, Good, HSG D 188 85 Weighted Average 131 69.68% Pervious Area 57 30.32% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR6: Basin 6 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.024 0.023 0.022 0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=188 sf Runoff Volume=69 cf Runoff Depth=4.40" Tc=6.0 min CN=85 0.02 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 194HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR7: Basin 7 Runoff = 0.05 cfs @ 12.13 hrs, Volume= 168 cf, Depth= 4.40" Routed to Pond 7 : Surface 7 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 120 98 Site Impervious 338 80 >75% Grass cover, Good, HSG D 458 85 Weighted Average 338 73.80% Pervious Area 120 26.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR7: Basin 7 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=458 sf Runoff Volume=168 cf Runoff Depth=4.40" Tc=6.0 min CN=85 0.05 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 195HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR8: Basin 8 Runoff = 0.07 cfs @ 12.13 hrs, Volume= 214 cf, Depth= 4.08" Routed to Pond 8 : Surface 8 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 64 98 Site Impervious 566 80 >75% Grass cover, Good, HSG D 630 82 Weighted Average 566 89.84% Pervious Area 64 10.16% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR8: Basin 8 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=630 sf Runoff Volume=214 cf Runoff Depth=4.08" Tc=6.0 min CN=82 0.07 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 196HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR9: Basin 9 Runoff = 0.45 cfs @ 12.13 hrs, Volume= 1,437 cf, Depth= 4.40" Routed to Pond 9 : Surface 9 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 25-YR Rainfall=6.10" Area (sf) CN Description * 1,067 98 Impervious 2,856 80 >75% Grass cover, Good, HSG D 3,923 85 Weighted Average 2,856 72.80% Pervious Area 1,067 27.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR9: Basin 9 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.5 0.48 0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 25-YR Rainfall=6.10" Runoff Area=3,923 sf Runoff Volume=1,437 cf Runoff Depth=4.40" Tc=6.0 min CN=85 0.45 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 197HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach DP-PR: Proposed Site [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 41,329 sf, 38.60% Impervious, Inflow Depth = 4.62" for 25-YR event Inflow = 4.09 cfs @ 12.14 hrs, Volume= 15,896 cf Outflow = 4.09 cfs @ 12.14 hrs, Volume= 15,896 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Reach DP-PR: Proposed Site Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)4 3 2 1 0 Inflow Area=41,329 sf 4.09 cfs4.09 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 198HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach P1: 4" Pipe Under Path [52] Hint: Inlet/Outlet conditions not evaluated Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 4.37" for 25-YR event Inflow = 0.28 cfs @ 12.15 hrs, Volume= 917 cf Outflow = 0.28 cfs @ 12.16 hrs, Volume= 917 cf, Atten= 0%, Lag= 0.0 min Routed to Pond 7S : Subsurface 7 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Max. Velocity= 5.68 fps, Min. Travel Time= 0.0 min Avg. Velocity = 1.87 fps, Avg. Travel Time= 0.1 min Peak Storage= 1 cf @ 12.16 hrs Average Depth at Peak Storage= 0.15' , Surface Width= 0.46' Bank-Full Depth= 0.50' Flow Area= 0.2 sf, Capacity= 1.45 cfs 6.0" Round Pipe n= 0.013 Corrugated PE, smooth interior Length= 15.0' Slope= 0.0667 '/' Inlet Invert= 177.18', Outlet Invert= 176.18' NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 199HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Reach P1: 4" Pipe Under Path Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,519 sf Avg. Flow Depth=0.15' Max Vel=5.68 fps 6.0" Round Pipe n=0.013 L=15.0' S=0.0667 '/' Capacity=1.45 cfs 0.28 cfs0.28 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 200HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach P2: 8" Pipe [52] Hint: Inlet/Outlet conditions not evaluated Inflow Area = 6,492 sf, 18.21% Impervious, Inflow Depth = 4.22" for 25-YR event Inflow = 0.57 cfs @ 12.21 hrs, Volume= 2,284 cf Outflow = 0.57 cfs @ 12.21 hrs, Volume= 2,284 cf, Atten= 0%, Lag= 0.2 min Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Max. Velocity= 3.76 fps, Min. Travel Time= 0.3 min Avg. Velocity = 1.22 fps, Avg. Travel Time= 0.9 min Peak Storage= 10 cf @ 12.21 hrs Average Depth at Peak Storage= 0.30' , Surface Width= 0.66' Bank-Full Depth= 0.67' Flow Area= 0.3 sf, Capacity= 1.37 cfs 8.0" Round Pipe n= 0.013 Corrugated PE, smooth interior Length= 65.0' Slope= 0.0129 '/' Inlet Invert= 174.50', Outlet Invert= 173.66' NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 201HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Reach P2: 8" Pipe Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=6,492 sf Avg. Flow Depth=0.30' Max Vel=3.76 fps 8.0" Round Pipe n=0.013 L=65.0' S=0.0129 '/' Capacity=1.37 cfs 0.57 cfs0.57 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 202HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach P3: 4" Outlet Pipe [52] Hint: Inlet/Outlet conditions not evaluated Inflow Area = 2,880 sf, 39.41% Impervious, Inflow Depth = 4.62" for 25-YR event Inflow = 0.24 cfs @ 12.15 hrs, Volume= 1,110 cf Outflow = 0.24 cfs @ 12.15 hrs, Volume= 1,110 cf, Atten= 0%, Lag= 0.1 min Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Max. Velocity= 5.69 fps, Min. Travel Time= 0.4 min Avg. Velocity = 1.57 fps, Avg. Travel Time= 1.4 min Peak Storage= 6 cf @ 12.15 hrs Average Depth at Peak Storage= 0.13' , Surface Width= 0.44' Bank-Full Depth= 0.50' Flow Area= 0.2 sf, Capacity= 1.53 cfs 6.0" Round Pipe n= 0.013 Corrugated PE, smooth interior Length= 136.0' Slope= 0.0748 '/' Inlet Invert= 183.17', Outlet Invert= 173.00' NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 203HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Reach P3: 4" Outlet Pipe Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.27 0.26 0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,880 sf Avg. Flow Depth=0.13' Max Vel=5.69 fps 6.0" Round Pipe n=0.013 L=136.0' S=0.0748 '/' Capacity=1.53 cfs 0.24 cfs0.24 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 204HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1: Surface 1 Inflow Area = 1,918 sf, 33.52% Impervious, Inflow Depth = 4.50" for 25-YR event Inflow = 0.22 cfs @ 12.13 hrs, Volume= 720 cf Outflow = 0.22 cfs @ 12.14 hrs, Volume= 720 cf, Atten= 1%, Lag= 0.6 min Primary = 0.22 cfs @ 12.14 hrs, Volume= 596 cf Routed to Pond 2 : Surface 2 Secondary = 0.00 cfs @ 12.14 hrs, Volume= 124 cf Routed to Pond 1S : Subsurface 1 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 183.38' @ 12.14 hrs Surf.Area= 46 sf Storage= 17 cf Plug-Flow detention time= 8.3 min calculated for 720 cf (100% of inflow) Center-of-Mass det. time= 8.3 min ( 811.7 - 803.4 ) Volume Invert Avail.Storage Storage Description #1 182.50' 23 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.50 2 0 0 183.00 17 5 5 183.51 55 18 23 Device Routing Invert Outlet Devices #1 Secondary 182.50'4.000 in/hr Exfiltration over Surface area #2 Primary 183.50'8.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 183.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 183.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.22 cfs @ 12.14 hrs HW=183.38' TW=182.89' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.15 cfs @ 2.42 fps) 4=Orifice/Grate (Orifice Controls 0.07 cfs @ 1.17 fps) Secondary OutFlow Max=0.00 cfs @ 12.14 hrs HW=183.38' TW=178.21' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.00 cfs) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 205HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 1: Surface 1 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=1,918 sf Peak Elev=183.38' Storage=17 cf 0.22 cfs0.22 cfs0.22 cfs 0.00 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 206HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1S: Subsurface 1 Inflow = 0.00 cfs @ 12.14 hrs, Volume= 124 cf Outflow = 0.00 cfs @ 12.17 hrs, Volume= 124 cf, Atten= 2%, Lag= 1.5 min Primary = 0.00 cfs @ 12.17 hrs, Volume= 124 cf Routed to Pond 2S : Subsurface 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 178.21' @ 12.17 hrs Surf.Area= 52 sf Storage= 1 cf Plug-Flow detention time= 7.8 min calculated for 124 cf (100% of inflow) Center-of-Mass det. time= 6.6 min ( 926.9 - 920.3 ) Volume Invert Avail.Storage Storage Description #1 178.16' 48 cf Custom Stage Data (Prismatic) Listed below (Recalc) 122 cf Overall - 1 cf Embedded = 121 cf x 40.0% Voids #2 178.17' 1 cf 4.0" Round Pipe Storage Inside #1 L= 11.8' 49 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 178.16 52 0 0 180.50 52 122 122 Device Routing Invert Outlet Devices #1 Primary 178.17'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.00 cfs @ 12.17 hrs HW=178.21' TW=177.73' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.00 cfs @ 0.68 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 207HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 1S: Subsurface 1 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.005 0.004 0.004 0.004 0.004 0.004 0.003 0.003 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Peak Elev=178.21' Storage=1 cf 0.00 cfs0.00 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 208HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2: Surface 2 Inflow Area = 2,082 sf, 30.88% Impervious, Inflow Depth = 3.74" for 25-YR event Inflow = 0.23 cfs @ 12.14 hrs, Volume= 649 cf Outflow = 0.23 cfs @ 12.15 hrs, Volume= 649 cf, Atten= 2%, Lag= 0.7 min Primary = 0.22 cfs @ 12.15 hrs, Volume= 506 cf Routed to Pond 3 : Surface 3 Secondary = 0.00 cfs @ 12.15 hrs, Volume= 142 cf Routed to Pond 2S : Subsurface 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 182.89' @ 12.15 hrs Surf.Area= 52 sf Storage= 22 cf Plug-Flow detention time= 10.6 min calculated for 649 cf (100% of inflow) Center-of-Mass det. time= 10.7 min ( 802.3 - 791.7 ) Volume Invert Avail.Storage Storage Description #1 182.00' 28 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.00 2 0 0 182.50 25 7 7 183.01 60 22 28 Device Routing Invert Outlet Devices #1 Secondary 182.00'4.000 in/hr Exfiltration over Surface area #2 Primary 183.00'8.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 182.50'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 182.75'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.22 cfs @ 12.15 hrs HW=182.89' TW=181.89' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.15 cfs @ 2.46 fps) 4=Orifice/Grate (Orifice Controls 0.07 cfs @ 1.21 fps) Secondary OutFlow Max=0.00 cfs @ 12.15 hrs HW=182.89' TW=177.73' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.00 cfs) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 209HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 2: Surface 2 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.26 0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,082 sf Peak Elev=182.89' Storage=22 cf 0.23 cfs0.23 cfs0.22 cfs 0.00 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 210HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2S: Subsurface 2 Inflow = 0.01 cfs @ 12.16 hrs, Volume= 266 cf Outflow = 0.01 cfs @ 12.18 hrs, Volume= 266 cf, Atten= 1%, Lag= 1.2 min Primary = 0.01 cfs @ 12.18 hrs, Volume= 266 cf Routed to Pond 3S : Subsurface 3 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.73' @ 12.18 hrs Surf.Area= 57 sf Storage= 2 cf Plug-Flow detention time= 5.4 min calculated for 266 cf (100% of inflow) Center-of-Mass det. time= 4.6 min ( 954.5 - 949.9 ) Volume Invert Avail.Storage Storage Description #1 177.66' 53 cf Custom Stage Data (Prismatic) Listed below (Recalc) 133 cf Overall - 1 cf Embedded = 133 cf x 40.0% Voids #2 177.67' 1 cf 4.0" Round Pipe Storage Inside #1 L= 10.0' 54 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.66 57 0 0 180.00 57 133 133 Device Routing Invert Outlet Devices #1 Primary 177.67'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.18 hrs HW=177.73' TW=177.33' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.83 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 211HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 2S: Subsurface 2 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.009 0.009 0.008 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Peak Elev=177.73' Storage=2 cf 0.01 cfs0.01 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 212HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 3: Surface 3 Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 3.10" for 25-YR event Inflow = 0.27 cfs @ 12.15 hrs, Volume= 651 cf Outflow = 0.27 cfs @ 12.15 hrs, Volume= 651 cf, Atten= 0%, Lag= 0.3 min Primary = 0.26 cfs @ 12.15 hrs, Volume= 493 cf Routed to Reach P1 : 4" Pipe Under Path Secondary = 0.01 cfs @ 12.15 hrs, Volume= 158 cf Routed to Pond 3S : Subsurface 3 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 181.89' @ 12.15 hrs Surf.Area= 59 sf Storage= 14 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 6.9 min ( 776.3 - 769.3 ) Volume Invert Avail.Storage Storage Description #1 181.50' 22 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 181.50 15 0 0 182.00 71 22 22 Device Routing Invert Outlet Devices #1 Secondary 181.50'4.000 in/hr Exfiltration over Surface area #2 Primary 181.80'12inch-Dome Grate Capacity Primary OutFlow Max=0.26 cfs @ 12.15 hrs HW=181.89' TW=177.33' (Dynamic Tailwater) 2=12inch-Dome Grate Capacity (Custom Controls 0.26 cfs) Secondary OutFlow Max=0.01 cfs @ 12.15 hrs HW=181.89' TW=177.33' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 213HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 3: Surface 3 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,519 sf Peak Elev=181.89' Storage=14 cf 0.27 cfs0.27 cfs0.26 cfs 0.01 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 214HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 3S: Subsurface 3 [90] Warning: Qout>Qin may require smaller dt or Finer Routing Inflow = 0.01 cfs @ 12.17 hrs, Volume= 424 cf Outflow = 0.02 cfs @ 12.21 hrs, Volume= 424 cf, Atten= 0%, Lag= 2.3 min Primary = 0.02 cfs @ 12.21 hrs, Volume= 424 cf Routed to Reach P1 : 4" Pipe Under Path Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.33' @ 12.16 hrs Surf.Area= 71 sf Storage= 5 cf Plug-Flow detention time= 5.3 min calculated for 424 cf (100% of inflow) Center-of-Mass det. time= 4.7 min ( 934.1 - 929.4 ) Volume Invert Avail.Storage Storage Description #1 177.17' 66 cf Custom Stage Data (Prismatic) Listed below (Recalc) 165 cf Overall - 1 cf Embedded = 164 cf x 40.0% Voids #2 177.18' 1 cf 4.0" Round Pipe Storage Inside #1 L= 17.0' 67 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.17 71 0 0 179.50 71 165 165 Device Routing Invert Outlet Devices #1 Primary 177.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 12.21 hrs HW=177.32' TW=177.31' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 0.51 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 215HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 3S: Subsurface 3 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=177.33' Storage=5 cf0.01 cfs 0.02 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 216HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 4: Surface 4 Inflow Area = 2,525 sf, 10.02% Impervious, Inflow Depth = 4.08" for 25-YR event Inflow = 0.27 cfs @ 12.13 hrs, Volume= 858 cf Outflow = 0.24 cfs @ 12.17 hrs, Volume= 858 cf, Atten= 13%, Lag= 2.1 min Primary = 0.22 cfs @ 12.17 hrs, Volume= 404 cf Routed to Pond 5 : Surface 5 Secondary = 0.02 cfs @ 12.17 hrs, Volume= 455 cf Routed to Pond 4S : Subsurface 4 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 183.39' @ 12.17 hrs Surf.Area= 201 sf Storage= 93 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 22.2 min ( 838.0 - 815.8 ) Volume Invert Avail.Storage Storage Description #1 182.50' 119 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.50 14 0 0 183.00 114 32 32 183.51 229 87 119 Device Routing Invert Outlet Devices #1 Secondary 182.50'4.000 in/hr Exfiltration over Surface area #2 Primary 183.50'7.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 183.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 183.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.22 cfs @ 12.17 hrs HW=183.38' TW=182.89' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.15 cfs @ 2.43 fps) 4=Orifice/Grate (Orifice Controls 0.07 cfs @ 1.18 fps) Secondary OutFlow Max=0.02 cfs @ 12.17 hrs HW=183.38' TW=178.26' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.02 cfs) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 217HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 4: Surface 4 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,525 sf Peak Elev=183.39' Storage=93 cf 0.27 cfs 0.24 cfs 0.22 cfs 0.02 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 218HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 4S: Subsurface 4 Inflow = 0.02 cfs @ 12.17 hrs, Volume= 455 cf Outflow = 0.02 cfs @ 12.22 hrs, Volume= 454 cf, Atten= 4%, Lag= 3.4 min Primary = 0.02 cfs @ 12.22 hrs, Volume= 454 cf Routed to Pond 5S : Subsurface 5 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 178.27' @ 12.22 hrs Surf.Area= 229 sf Storage= 9 cf Plug-Flow detention time= 14.1 min calculated for 454 cf (100% of inflow) Center-of-Mass det. time= 13.1 min ( 934.8 - 921.7 ) Volume Invert Avail.Storage Storage Description #1 178.17' 212 cf Custom Stage Data (Prismatic) Listed below (Recalc) 534 cf Overall - 3 cf Embedded = 530 cf x 40.0% Voids #2 178.18' 3 cf 4.0" Round Pipe Storage Inside #1 L= 36.0' 215 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 178.17 229 0 0 180.50 229 534 534 Device Routing Invert Outlet Devices #1 Primary 178.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 12.22 hrs HW=178.27' TW=177.78' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 1.00 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 219HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 4S: Subsurface 4 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=178.27' Storage=9 cf 0.02 cfs 0.02 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 220HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 5: Surface 5 Inflow Area = 2,697 sf, 10.53% Impervious, Inflow Depth = 2.06" for 25-YR event Inflow = 0.24 cfs @ 12.16 hrs, Volume= 464 cf Outflow = 0.23 cfs @ 12.18 hrs, Volume= 464 cf, Atten= 2%, Lag= 0.9 min Primary = 0.23 cfs @ 12.18 hrs, Volume= 386 cf Routed to Pond 6 : Surface 6 Secondary = 0.01 cfs @ 12.18 hrs, Volume= 77 cf Routed to Pond 5S : Subsurface 5 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 182.89' @ 12.18 hrs Surf.Area= 61 sf Storage= 28 cf Plug-Flow detention time= 7.0 min calculated for 464 cf (100% of inflow) Center-of-Mass det. time= 7.0 min ( 759.7 - 752.7 ) Volume Invert Avail.Storage Storage Description #1 182.00' 36 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.00 2 0 0 182.50 36 10 10 183.01 68 27 36 Device Routing Invert Outlet Devices #1 Secondary 182.00'4.000 in/hr Exfiltration over Surface area #2 Primary 183.00'7.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 182.50'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 182.75'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.23 cfs @ 12.18 hrs HW=182.89' TW=182.40' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.15 cfs @ 2.46 fps) 4=Orifice/Grate (Orifice Controls 0.07 cfs @ 1.21 fps) Secondary OutFlow Max=0.01 cfs @ 12.18 hrs HW=182.89' TW=177.78' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 221HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 5: Surface 5 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.26 0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,697 sf Peak Elev=182.89' Storage=28 cf 0.24 cfs0.23 cfs0.23 cfs 0.01 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 222HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 5S: Subsurface 5 Inflow = 0.02 cfs @ 12.21 hrs, Volume= 531 cf Outflow = 0.02 cfs @ 12.23 hrs, Volume= 531 cf, Atten= 0%, Lag= 1.2 min Primary = 0.02 cfs @ 12.23 hrs, Volume= 531 cf Routed to Pond 6S : Subsurface 6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.78' @ 12.23 hrs Surf.Area= 68 sf Storage= 3 cf Plug-Flow detention time= 4.0 min calculated for 531 cf (100% of inflow) Center-of-Mass det. time= 3.6 min ( 925.4 - 921.9 ) Volume Invert Avail.Storage Storage Description #1 177.67' 63 cf Custom Stage Data (Prismatic) Listed below (Recalc) 158 cf Overall - 1 cf Embedded = 157 cf x 40.0% Voids #2 177.68' 1 cf 4.0" Round Pipe Storage Inside #1 L= 12.0' 64 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.67 68 0 0 180.00 68 158 158 Device Routing Invert Outlet Devices #1 Primary 177.68'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 12.23 hrs HW=177.78' TW=177.29' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 1.07 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 223HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 5S: Subsurface 5 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.026 0.025 0.024 0.023 0.022 0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=177.78' Storage=3 cf 0.02 cfs0.02 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 224HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 6: Surface 6 Inflow Area = 2,885 sf, 11.82% Impervious, Inflow Depth = 1.89" for 25-YR event Inflow = 0.24 cfs @ 12.17 hrs, Volume= 455 cf Outflow = 0.24 cfs @ 12.19 hrs, Volume= 455 cf, Atten= 1%, Lag= 0.9 min Primary = 0.23 cfs @ 12.19 hrs, Volume= 378 cf Routed to Pond 7 : Surface 7 Secondary = 0.01 cfs @ 12.19 hrs, Volume= 77 cf Routed to Pond 6S : Subsurface 6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 182.40' @ 12.19 hrs Surf.Area= 58 sf Storage= 30 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 6.8 min ( 758.9 - 752.1 ) Volume Invert Avail.Storage Storage Description #1 181.50' 37 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 181.50 2 0 0 182.00 40 11 11 182.51 63 26 37 Device Routing Invert Outlet Devices #1 Secondary 181.50'4.000 in/hr Exfiltration over Surface area #2 Primary 182.50'9.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 182.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 182.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.23 cfs @ 12.19 hrs HW=182.40' TW=181.42' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.16 cfs @ 2.50 fps) 4=Orifice/Grate (Orifice Controls 0.08 cfs @ 1.24 fps) Secondary OutFlow Max=0.01 cfs @ 12.19 hrs HW=182.40' TW=177.29' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 225HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 6: Surface 6 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.27 0.26 0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=2,885 sf Peak Elev=182.40' Storage=30 cf 0.24 cfs0.24 cfs0.23 cfs 0.01 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 226HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 6S: Subsurface 6 Inflow = 0.03 cfs @ 12.22 hrs, Volume= 608 cf Outflow = 0.03 cfs @ 12.24 hrs, Volume= 608 cf, Atten= 0%, Lag= 1.0 min Primary = 0.03 cfs @ 12.24 hrs, Volume= 608 cf Routed to Pond 7S : Subsurface 7 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.29' @ 12.24 hrs Surf.Area= 63 sf Storage= 3 cf Plug-Flow detention time= 3.7 min calculated for 608 cf (100% of inflow) Center-of-Mass det. time= 3.1 min ( 917.9 - 914.7 ) Volume Invert Avail.Storage Storage Description #1 177.17' 58 cf Custom Stage Data (Prismatic) Listed below (Recalc) 147 cf Overall - 1 cf Embedded = 146 cf x 40.0% Voids #2 177.18' 1 cf 4.0" Round Pipe Storage Inside #1 L= 13.0' 59 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.17 63 0 0 179.50 63 147 147 Device Routing Invert Outlet Devices #1 Primary 177.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.03 cfs @ 12.24 hrs HW=177.29' TW=176.72' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.03 cfs @ 1.13 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 227HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 6S: Subsurface 6 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 Peak Elev=177.29' Storage=3 cf 0.03 cfs0.03 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 228HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 7: Surface 7 Inflow Area = 3,343 sf, 13.79% Impervious, Inflow Depth = 1.96" for 25-YR event Inflow = 0.27 cfs @ 12.18 hrs, Volume= 546 cf Outflow = 0.26 cfs @ 12.20 hrs, Volume= 546 cf, Atten= 4%, Lag= 1.6 min Primary = 0.25 cfs @ 12.20 hrs, Volume= 403 cf Routed to Pond 8 : Surface 8 Secondary = 0.01 cfs @ 12.20 hrs, Volume= 143 cf Routed to Pond 7S : Subsurface 7 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 181.42' @ 12.20 hrs Surf.Area= 106 sf Storage= 58 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 15.6 min ( 777.5 - 761.9 ) Volume Invert Avail.Storage Storage Description #1 180.00' 69 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 180.00 2 0 0 180.50 18 5 5 181.00 58 19 24 181.51 117 45 69 Device Routing Invert Outlet Devices #1 Secondary 180.00'4.000 in/hr Exfiltration over Surface area #2 Primary 181.50'10.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 181.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 181.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.25 cfs @ 12.20 hrs HW=181.42' TW=180.10' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.16 cfs @ 2.58 fps) 4=Orifice/Grate (Orifice Controls 0.09 cfs @ 1.31 fps) Secondary OutFlow Max=0.01 cfs @ 12.20 hrs HW=181.42' TW=176.82' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 229HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 7: Surface 7 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=3,343 sf Peak Elev=181.42' Storage=58 cf 0.27 cfs 0.26 cfs 0.25 cfs 0.01 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 230HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 7S: Subsurface 7 [62] Hint: Exceeded Reach P1 OUTLET depth by 0.51' @ 12.19 hrs Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 7.94" for 25-YR event Inflow = 0.31 cfs @ 12.16 hrs, Volume= 1,667 cf Outflow = 0.29 cfs @ 12.18 hrs, Volume= 1,667 cf, Atten= 7%, Lag= 1.7 min Primary = 0.29 cfs @ 12.18 hrs, Volume= 1,667 cf Routed to Pond 8S : Subsurface 8 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 176.83' @ 12.18 hrs Surf.Area= 117 sf Storage= 32 cf Plug-Flow detention time= 3.6 min calculated for 1,667 cf (100% of inflow) Center-of-Mass det. time= 3.4 min ( 869.4 - 866.0 ) Volume Invert Avail.Storage Storage Description #1 176.17' 108 cf Custom Stage Data (Prismatic) Listed below (Recalc) 273 cf Overall - 2 cf Embedded = 271 cf x 40.0% Voids #2 176.18' 2 cf 4.0" Round Pipe Storage Inside #1 L= 21.0' 110 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 176.17 117 0 0 178.50 117 273 273 Device Routing Invert Outlet Devices #1 Primary 176.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.29 cfs @ 12.18 hrs HW=176.83' TW=175.30' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.29 cfs @ 3.35 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 231HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 7S: Subsurface 7 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,519 sf Peak Elev=176.83' Storage=32 cf 0.31 cfs 0.29 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 232HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 8: Surface 8 Inflow Area = 3,973 sf, 13.21% Impervious, Inflow Depth = 1.86" for 25-YR event Inflow = 0.30 cfs @ 12.18 hrs, Volume= 617 cf Outflow = 0.30 cfs @ 12.20 hrs, Volume= 617 cf, Atten= 1%, Lag= 0.8 min Primary = 0.28 cfs @ 12.20 hrs, Volume= 368 cf Routed to Reach P2 : 8" Pipe Secondary = 0.02 cfs @ 12.20 hrs, Volume= 249 cf Routed to Pond 8S : Subsurface 8 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 180.10' @ 12.20 hrs Surf.Area= 167 sf Storage= 85 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 22.7 min ( 791.0 - 768.3 ) Volume Invert Avail.Storage Storage Description #1 179.00' 164 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 179.00 7 0 0 179.50 49 14 14 179.75 120 21 35 180.50 223 129 164 Device Routing Invert Outlet Devices #1 Secondary 179.00'4.000 in/hr Exfiltration over Surface area #2 Primary 180.00'12inch-Dome Grate Capacity Primary OutFlow Max=0.28 cfs @ 12.20 hrs HW=180.10' TW=174.80' (Dynamic Tailwater) 2=12inch-Dome Grate Capacity (Custom Controls 0.28 cfs) Secondary OutFlow Max=0.02 cfs @ 12.20 hrs HW=180.10' TW=175.32' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.02 cfs) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 233HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 8: Surface 8 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=3,973 sf Peak Elev=180.10' Storage=85 cf 0.30 cfs0.30 cfs 0.28 cfs 0.02 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 234HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 8S: Subsurface 8 Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 9.13" for 25-YR event Inflow = 0.31 cfs @ 12.18 hrs, Volume= 1,916 cf Outflow = 0.29 cfs @ 12.22 hrs, Volume= 1,916 cf, Atten= 5%, Lag= 2.0 min Primary = 0.29 cfs @ 12.22 hrs, Volume= 1,916 cf Routed to Reach P2 : 8" Pipe Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 175.33' @ 12.22 hrs Surf.Area= 120 sf Storage= 33 cf Plug-Flow detention time= 3.7 min calculated for 1,916 cf (100% of inflow) Center-of-Mass det. time= 3.3 min ( 871.8 - 868.6 ) Volume Invert Avail.Storage Storage Description #1 174.67' 111 cf Custom Stage Data (Prismatic) Listed below (Recalc) 280 cf Overall - 2 cf Embedded = 278 cf x 40.0% Voids #2 174.68' 2 cf 4.0" Round Pipe Storage Inside #1 L= 24.0' 113 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.67 120 0 0 177.00 120 280 280 Device Routing Invert Outlet Devices #1 Primary 174.68'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.29 cfs @ 12.22 hrs HW=175.33' TW=174.80' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.29 cfs @ 3.35 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 235HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 8S: Subsurface 8 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,519 sf Peak Elev=175.33' Storage=33 cf 0.31 cfs 0.29 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 236HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 9: Surface 9 Inflow Area = 3,923 sf, 27.20% Impervious, Inflow Depth = 4.40" for 25-YR event Inflow = 0.45 cfs @ 12.13 hrs, Volume= 1,437 cf Outflow = 0.45 cfs @ 12.13 hrs, Volume= 1,437 cf, Atten= 0%, Lag= 0.2 min Primary = 0.44 cfs @ 12.13 hrs, Volume= 1,170 cf Routed to Link 33L : On-site Closed Drainage Secondary = 0.01 cfs @ 12.13 hrs, Volume= 267 cf Routed to Pond 9S : Subsurface 9 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 174.38' @ 12.13 hrs Surf.Area= 65 sf Storage= 12 cf Plug-Flow detention time= 4.2 min calculated for 1,437 cf (100% of inflow) Center-of-Mass det. time= 4.2 min ( 810.9 - 806.6 ) Volume Invert Avail.Storage Storage Description #1 174.00' 86 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.00 1 0 0 175.00 170 86 86 Device Routing Invert Outlet Devices #1 Primary 174.25'12inch-Dome Grate Capacity #2 Secondary 174.00'4.000 in/hr Exfiltration over Surface area Primary OutFlow Max=0.44 cfs @ 12.13 hrs HW=174.38' TW=0.00' (Dynamic Tailwater) 1=12inch-Dome Grate Capacity (Custom Controls 0.44 cfs) Secondary OutFlow Max=0.01 cfs @ 12.13 hrs HW=174.38' TW=170.73' (Dynamic Tailwater) 2=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 237HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 9: Surface 9 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.5 0.48 0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=3,923 sf Peak Elev=174.38' Storage=12 cf 0.45 cfs0.45 cfs0.44 cfs 0.01 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 238HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 9S: Subsurface 9 Inflow = 0.01 cfs @ 12.13 hrs, Volume= 267 cf Outflow = 0.01 cfs @ 12.22 hrs, Volume= 265 cf, Atten= 11%, Lag= 5.1 min Primary = 0.01 cfs @ 12.22 hrs, Volume= 265 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 170.73' @ 12.22 hrs Surf.Area= 170 sf Storage= 10 cf Plug-Flow detention time= 37.8 min calculated for 265 cf (99% of inflow) Center-of-Mass det. time= 34.5 min ( 958.9 - 924.3 ) Volume Invert Avail.Storage Storage Description #1 170.67' 395 cf Custom Stage Data (Prismatic) Listed below (Recalc) 396 cf Overall - 1 cf Embedded = 395 cf #2 170.68' 1 cf 4.0" Round Pipe Storage Inside #1 L= 17.0' 396 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 170.67 170 0 0 173.00 170 396 396 Device Routing Invert Outlet Devices #1 Primary 170.68'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.22 hrs HW=170.73' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.73 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 239HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 9S: Subsurface 9 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.007 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Peak Elev=170.73' Storage=10 cf 0.01 cfs 0.01 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 240HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 10: Surface 10 Inflow Area = 3,386 sf, 9.57% Impervious, Inflow Depth = 4.08" for 25-YR event Inflow = 0.37 cfs @ 12.13 hrs, Volume= 1,151 cf Outflow = 0.36 cfs @ 12.14 hrs, Volume= 1,151 cf, Atten= 0%, Lag= 0.4 min Primary = 0.35 cfs @ 12.14 hrs, Volume= 668 cf Routed to Link 33L : On-site Closed Drainage Secondary = 0.01 cfs @ 12.14 hrs, Volume= 483 cf Routed to Pond 10S : Subsurface 10 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 173.36' @ 12.14 hrs Surf.Area= 121 sf Storage= 34 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 10.9 min ( 826.7 - 815.8 ) Volume Invert Avail.Storage Storage Description #1 173.00' 142 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 173.00 68 0 0 174.00 215 142 142 Device Routing Invert Outlet Devices #1 Primary 173.25'12inch-Dome Grate Capacity #2 Secondary 173.00'4.000 in/hr Exfiltration over Surface area Primary OutFlow Max=0.35 cfs @ 12.14 hrs HW=173.36' TW=0.00' (Dynamic Tailwater) 1=12inch-Dome Grate Capacity (Custom Controls 0.35 cfs) Secondary OutFlow Max=0.01 cfs @ 12.14 hrs HW=173.36' TW=168.74' (Dynamic Tailwater) 2=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 241HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 10: Surface 10 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=3,386 sf Peak Elev=173.36' Storage=34 cf 0.37 cfs0.36 cfs0.35 cfs 0.01 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 242HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 10S: Subsurface 10 Inflow = 0.01 cfs @ 12.14 hrs, Volume= 483 cf Outflow = 0.01 cfs @ 12.18 hrs, Volume= 482 cf, Atten= 2%, Lag= 2.6 min Primary = 0.01 cfs @ 12.18 hrs, Volume= 482 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 168.74' @ 12.18 hrs Surf.Area= 215 sf Storage= 6 cf Plug-Flow detention time= 11.5 min calculated for 482 cf (100% of inflow) Center-of-Mass det. time= 10.7 min ( 949.5 - 938.8 ) Volume Invert Avail.Storage Storage Description #1 168.67' 200 cf Custom Stage Data (Prismatic) Listed below (Recalc) 501 cf Overall - 2 cf Embedded = 499 cf x 40.0% Voids #2 168.68' 2 cf 4.0" Round Pipe Storage Inside #1 L= 18.0' 201 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 168.67 215 0 0 171.00 215 501 501 Device Routing Invert Outlet Devices #1 Primary 168.68'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.18 hrs HW=168.74' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.83 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 243HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 10S: Subsurface 10 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.013 0.012 0.011 0.011 0.01 0.01 0.009 0.009 0.008 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Peak Elev=168.74' Storage=6 cf 0.01 cfs0.01 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 244HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 11: Surface 11 Inflow Area = 2,880 sf, 39.41% Impervious, Inflow Depth = 4.62" for 25-YR event Inflow = 0.25 cfs @ 12.13 hrs, Volume= 1,110 cf Outflow = 0.25 cfs @ 12.14 hrs, Volume= 1,110 cf, Atten= 1%, Lag= 0.5 min Primary = 0.24 cfs @ 12.14 hrs, Volume= 439 cf Routed to Reach P3 : 4" Outlet Pipe Secondary = 0.01 cfs @ 12.14 hrs, Volume= 671 cf Routed to Pond 11S : Subsurface 11 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 185.38' @ 12.14 hrs Surf.Area= 116 sf Storage= 53 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 39.0 min ( 1,016.7 - 977.8 ) Volume Invert Avail.Storage Storage Description #1 184.50' 284 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 184.50 23 0 0 185.00 56 20 20 186.00 211 134 153 186.50 310 130 284 Device Routing Invert Outlet Devices #1 Secondary 184.50'4.000 in/hr Exfiltration over Surface area #2 Primary 185.30'12inch-Dome Grate Capacity Primary OutFlow Max=0.24 cfs @ 12.14 hrs HW=185.38' TW=183.30' (Dynamic Tailwater) 2=12inch-Dome Grate Capacity (Custom Controls 0.24 cfs) Secondary OutFlow Max=0.01 cfs @ 12.14 hrs HW=185.38' TW=183.30' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 245HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 11: Surface 11 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,880 sf Peak Elev=185.38' Storage=53 cf 0.25 cfs0.25 cfs 0.24 cfs 0.01 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 246HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 11S: Subsurface 11 [90] Warning: Qout>Qin may require smaller dt or Finer Routing Inflow = 0.01 cfs @ 12.14 hrs, Volume= 671 cf Outflow = 0.02 cfs @ 12.23 hrs, Volume= 671 cf, Atten= 0%, Lag= 5.3 min Primary = 0.02 cfs @ 12.23 hrs, Volume= 671 cf Routed to Reach P3 : 4" Outlet Pipe Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 183.31' @ 12.17 hrs Surf.Area= 310 sf Storage= 17 cf Plug-Flow detention time= 18.2 min calculated for 671 cf (100% of inflow) Center-of-Mass det. time= 18.0 min ( 1,198.1 - 1,180.1 ) Volume Invert Avail.Storage Storage Description #1 183.17' 289 cf Custom Stage Data (Prismatic) Listed below (Recalc) 722 cf Overall x 40.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 183.17 310 0 0 185.50 310 722 722 Device Routing Invert Outlet Devices #1 Primary 183.17'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 12.23 hrs HW=183.30' TW=183.28' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 0.65 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 247HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 11S: Subsurface 11 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=183.31' Storage=17 cf 0.01 cfs 0.02 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 248HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 29P: Landscape Filter Inflow Area = 5,639 sf,100.00% Impervious, Inflow Depth = 5.66" for 25-YR event Inflow = 0.52 cfs @ 12.13 hrs, Volume= 2,658 cf Outflow = 0.46 cfs @ 12.18 hrs, Volume= 2,653 cf, Atten= 12%, Lag= 3.2 min Primary = 0.46 cfs @ 12.18 hrs, Volume= 2,653 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 170.99' @ 12.18 hrs Surf.Area= 1,000 sf Storage= 198 cf Plug-Flow detention time= 21.3 min calculated for 2,653 cf (100% of inflow) Center-of-Mass det. time= 20.4 min ( 767.1 - 746.6 ) Volume Invert Avail.Storage Storage Description #1 170.50' 1,000 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 170.50 1,000 0.0 0 0 170.51 1,000 40.0 4 4 171.50 1,000 40.0 396 400 171.51 1,000 20.0 2 402 174.50 1,000 20.0 598 1,000 Device Routing Invert Outlet Devices #1 Primary 170.51'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.46 cfs @ 12.18 hrs HW=170.99' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.46 cfs @ 2.37 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 249HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 29P: Landscape Filter Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=5,639 sf Peak Elev=170.99' Storage=198 cf 0.52 cfs 0.46 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 250HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 30P: Porous Pavers Inflow Area = 443 sf, 33.86% Impervious, Inflow Depth = 4.50" for 25-YR event Inflow = 0.00 cfs @ 20.97 hrs, Volume= 166 cf Outflow = 0.00 cfs @ 21.04 hrs, Volume= 166 cf, Atten= 0%, Lag= 3.9 min Primary = 0.00 cfs @ 21.04 hrs, Volume= 166 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 174.97' @ 21.04 hrs Surf.Area= 150 sf Storage= 3 cf Plug-Flow detention time= 21.3 min calculated for 166 cf (100% of inflow) Center-of-Mass det. time= 16.6 min ( 1,442.4 - 1,425.7 ) Volume Invert Avail.Storage Storage Description #1 174.92' 135 cf 31" section beneath paver (Prismatic) Listed below (Recalc) 387 cf Overall - 2 cf Embedded = 385 cf x 35.0% Voids #2 174.93' 2 cf 4.0" Round Pipe Storage Inside #1 L= 28.0' 137 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.92 150 0 0 177.50 150 387 387 Device Routing Invert Outlet Devices #1 Primary 174.93'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.00 cfs @ 21.04 hrs HW=174.97' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.00 cfs @ 0.66 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 251HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 30P: Porous Pavers Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.004 0.004 0.004 0.003 0.003 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Inflow Area=443 sf Peak Elev=174.97' Storage=3 cf 0.00 cfs0.00 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 252HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 31P: Distribution Pipes [57] Hint: Peaked at 173.90' (Flood elevation advised) Inflow Area = 2,750 sf,100.00% Impervious, Inflow Depth = 5.86" for 25-YR event Inflow = 0.37 cfs @ 12.13 hrs, Volume= 1,343 cf Outflow = 0.37 cfs @ 12.13 hrs, Volume= 1,343 cf, Atten= 0%, Lag= 0.0 min Primary = 0.25 cfs @ 12.13 hrs, Volume= 1,297 cf Routed to Pond 29P : Landscape Filter Secondary = 0.11 cfs @ 12.13 hrs, Volume= 47 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 173.90' @ 12.13 hrs Device Routing Invert Outlet Devices #1 Secondary 173.70'6.0" Vert. Overflow C= 0.600 Limited to weir flow at low heads #2 Primary 173.37'4.0" Vert. Distribution Pipe C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.25 cfs @ 12.13 hrs HW=173.90' TW=170.97' (Dynamic Tailwater) 2=Distribution Pipe (Orifice Controls 0.25 cfs @ 2.91 fps) Secondary OutFlow Max=0.11 cfs @ 12.13 hrs HW=173.90' TW=0.00' (Dynamic Tailwater) 1=Overflow (Orifice Controls 0.11 cfs @ 1.53 fps) Pond 31P: Distribution Pipes Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,750 sf Peak Elev=173.90' 0.37 cfs0.37 cfs 0.25 cfs 0.11 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 253HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 33P: Distribution Pipes [57] Hint: Peaked at 173.95' (Flood elevation advised) Inflow Area = 2,889 sf,100.00% Impervious, Inflow Depth = 5.86" for 25-YR event Inflow = 0.39 cfs @ 12.13 hrs, Volume= 1,411 cf Outflow = 0.39 cfs @ 12.13 hrs, Volume= 1,411 cf, Atten= 0%, Lag= 0.0 min Primary = 0.27 cfs @ 12.13 hrs, Volume= 1,361 cf Routed to Pond 29P : Landscape Filter Secondary = 0.12 cfs @ 12.13 hrs, Volume= 50 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 173.95' @ 12.13 hrs Device Routing Invert Outlet Devices #1 Secondary 173.70'4.0" Vert. Overflow C= 0.600 Limited to weir flow at low heads #2 Primary 173.37'4.0" Vert. Distribution Pipe C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.27 cfs @ 12.13 hrs HW=173.95' TW=170.97' (Dynamic Tailwater) 2=Distribution Pipe (Orifice Controls 0.27 cfs @ 3.08 fps) Secondary OutFlow Max=0.12 cfs @ 12.13 hrs HW=173.95' TW=0.00' (Dynamic Tailwater) 1=Overflow (Orifice Controls 0.12 cfs @ 1.69 fps) Pond 33P: Distribution Pipes Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,889 sf Peak Elev=173.95' 0.39 cfs0.39 cfs 0.27 cfs 0.12 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 254HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond PN: Porous Pavers Inflow Area = 676 sf, 77.51% Impervious, Inflow Depth = 5.40" for 25-YR event Inflow = 0.01 cfs @ 20.23 hrs, Volume= 304 cf Outflow = 0.01 cfs @ 20.93 hrs, Volume= 302 cf, Atten= 0%, Lag= 42.1 min Primary = 0.01 cfs @ 20.93 hrs, Volume= 302 cf Routed to Pond 11 : Surface 11 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 188.49' @ 20.93 hrs Surf.Area= 464 sf Storage= 11 cf Plug-Flow detention time= 49.9 min calculated for 302 cf (99% of inflow) Center-of-Mass det. time= 41.9 min ( 1,435.0 - 1,393.1 ) Volume Invert Avail.Storage Storage Description #1 188.42' 417 cf 31" section beneath pavers (Prismatic) Listed below (Recalc) 1,197 cf Overall - 6 cf Embedded = 1,191 cf x 35.0% Voids #2 188.43' 6 cf 4.0" Round Pipe Storage Inside #1 L= 67.0' 423 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 188.42 464 0 0 191.00 464 1,197 1,197 Device Routing Invert Outlet Devices #1 Primary 188.43'4.0" Round Culvert L= 7.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 188.43' / 186.00' S= 0.3471 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.09 sf Primary OutFlow Max=0.01 cfs @ 20.93 hrs HW=188.49' TW=185.30' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.01 cfs @ 0.65 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 255HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond PN: Porous Pavers Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.007 0.007 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Inflow Area=676 sf Peak Elev=188.49' Storage=11 cf 4.0" Round Culvert n=0.013 L=7.0' S=0.3471 '/' 0.01 cfs0.01 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 256HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond PS: Porous Pavers Inflow Area = 2,379 sf, 11.60% Impervious, Inflow Depth = 4.08" for 25-YR event Inflow = 0.02 cfs @ 20.97 hrs, Volume= 809 cf Outflow = 0.02 cfs @ 21.09 hrs, Volume= 808 cf, Atten= 0%, Lag= 7.0 min Primary = 0.02 cfs @ 21.09 hrs, Volume= 808 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 175.02' @ 21.09 hrs Surf.Area= 248 sf Storage= 9 cf Plug-Flow detention time= 13.5 min calculated for 808 cf (100% of inflow) Center-of-Mass det. time= 11.6 min ( 1,450.0 - 1,438.4 ) Volume Invert Avail.Storage Storage Description #1 174.92' 223 cf 31" section beneath paver (Prismatic) Listed below (Recalc) 640 cf Overall - 2 cf Embedded = 637 cf x 35.0% Voids #2 174.93' 2 cf 4.0" Round Pipe Storage Inside #1 L= 28.0' 226 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.92 248 0 0 177.50 248 640 640 Device Routing Invert Outlet Devices #1 Primary 174.93'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 21.09 hrs HW=175.02' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 1.00 fps) NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 257HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond PS: Porous Pavers Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Inflow Area=2,379 sf Peak Elev=175.02' Storage=9 cf 0.02 cfs0.02 cfs NOAA 24-hr D 25-YR Rainfall=6.10"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 258HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Link 33L: On-site Closed Drainage Inflow Area = 27,635 sf, 35.49% Impervious, Inflow Depth = 4.56" for 25-YR event Inflow = 2.45 cfs @ 12.14 hrs, Volume= 10,508 cf Primary = 2.45 cfs @ 12.14 hrs, Volume= 10,508 cf, Atten= 0%, Lag= 0.0 min Routed to Reach DP-PR : Proposed Site Primary outflow = Inflow, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs Link 33L: On-site Closed Drainage Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)2 1 0 Inflow Area=27,635 sf 2.45 cfs2.45 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 259HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Time span=0.00-100.00 hrs, dt=0.01 hrs, 10001 points x 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Runoff Area=1,918 sf 33.52% Impervious Runoff Depth=6.22"Subcatchment PR1: Basin 1 Tc=6.0 min CN=86 Runoff=0.30 cfs 995 cf Runoff Area=3,386 sf 9.57% Impervious Runoff Depth=5.76"Subcatchment PR10: Basin 10 Tc=6.0 min CN=82 Runoff=0.51 cfs 1,624 cf Runoff Area=2,204 sf 27.72% Impervious Runoff Depth=6.11"Subcatchment PR11: Basin 11 Tc=6.0 min CN=85 Runoff=0.34 cfs 1,122 cf Runoff Area=2,493 sf 1.36% Impervious Runoff Depth=5.52"Subcatchment PR12: West site to Area Drain Tc=6.0 min CN=80 Runoff=0.36 cfs 1,147 cf Runoff Area=2,379 sf 11.60% Impervious Runoff Depth=5.76"Subcatchment PR13: Pavers front Tc=674.0 min CN=82 Runoff=0.03 cfs 1,141 cf Runoff Area=676 sf 77.51% Impervious Runoff Depth=7.17"Subcatchment PR14: Pavers North Tc=674.0 min CN=94 Runoff=0.01 cfs 404 cf Runoff Area=2,750 sf 100.00% Impervious Runoff Depth=7.65"Subcatchment PR15a: Roof West Tc=6.0 min CN=98 Runoff=0.48 cfs 1,753 cf Runoff Area=2,889 sf 100.00% Impervious Runoff Depth=7.65"Subcatchment PR15b: Roof East Tc=6.0 min CN=98 Runoff=0.50 cfs 1,842 cf Runoff Area=13,694 sf 44.87% Impervious Runoff Depth=6.46"Subcatchment PR16: Remainder of site Tc=6.0 min CN=88 Runoff=2.22 cfs 7,373 cf Runoff Area=443 sf 33.86% Impervious Runoff Depth=6.22"Subcatchment PR17: Pavers path Tc=674.0 min CN=86 Runoff=0.01 cfs 230 cf Runoff Area=164 sf 0.00% Impervious Runoff Depth=5.52"Subcatchment PR2: Basin 2 Tc=6.0 min CN=80 Runoff=0.02 cfs 75 cf Runoff Area=437 sf 3.20% Impervious Runoff Depth=5.64"Subcatchment PR3: Basin 3 Tc=6.0 min CN=81 Runoff=0.06 cfs 205 cf Runoff Area=2,525 sf 10.02% Impervious Runoff Depth=5.76"Subcatchment PR4: Basin 4 Tc=6.0 min CN=82 Runoff=0.38 cfs 1,211 cf Runoff Area=172 sf 18.02% Impervious Runoff Depth=5.87"Subcatchment PR5: Basin 5 Tc=6.0 min CN=83 Runoff=0.03 cfs 84 cf Runoff Area=188 sf 30.32% Impervious Runoff Depth=6.11"Subcatchment PR6: Basin 6 Tc=6.0 min CN=85 Runoff=0.03 cfs 96 cf Runoff Area=458 sf 26.20% Impervious Runoff Depth=6.11"Subcatchment PR7: Basin 7 Tc=6.0 min CN=85 Runoff=0.07 cfs 233 cf NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 260HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Runoff Area=630 sf 10.16% Impervious Runoff Depth=5.76"Subcatchment PR8: Basin 8 Tc=6.0 min CN=82 Runoff=0.09 cfs 302 cf Runoff Area=3,923 sf 27.20% Impervious Runoff Depth=6.11"Subcatchment PR9: Basin 9 Tc=6.0 min CN=85 Runoff=0.61 cfs 1,997 cf Inflow=5.55 cfs 21,821 cfReach DP-PR: Proposed Site Outflow=5.55 cfs 21,821 cf Avg. Flow Depth=0.17' Max Vel=6.21 fps Inflow=0.38 cfs 1,275 cfReach P1: 4" Pipe Under Path 6.0" Round Pipe n=0.013 L=15.0' S=0.0667 '/' Capacity=1.45 cfs Outflow=0.38 cfs 1,275 cf Avg. Flow Depth=0.36' Max Vel=4.07 fps Inflow=0.79 cfs 3,199 cfReach P2: 8" Pipe 8.0" Round Pipe n=0.013 L=65.0' S=0.0129 '/' Capacity=1.37 cfs Outflow=0.79 cfs 3,199 cf Avg. Flow Depth=0.16' Max Vel=6.24 fps Inflow=0.33 cfs 1,524 cfReach P3: 4" Outlet Pipe 6.0" Round Pipe n=0.013 L=136.0' S=0.0748 '/' Capacity=1.53 cfs Outflow=0.33 cfs 1,524 cf Peak Elev=183.45' Storage=20 cf Inflow=0.30 cfs 995 cfPond 1: Surface 1 Primary=0.29 cfs 858 cf Secondary=0.00 cfs 137 cf Outflow=0.30 cfs 995 cf Peak Elev=178.21' Storage=1 cf Inflow=0.00 cfs 137 cfPond 1S: Subsurface 1 Outflow=0.00 cfs 136 cf Peak Elev=182.97' Storage=26 cf Inflow=0.32 cfs 934 cfPond 2: Surface 2 Primary=0.31 cfs 770 cf Secondary=0.01 cfs 164 cf Outflow=0.31 cfs 934 cf Peak Elev=177.73' Storage=2 cf Inflow=0.01 cfs 300 cfPond 2S: Subsurface 2 Outflow=0.01 cfs 300 cf Peak Elev=181.91' Storage=16 cf Inflow=0.37 cfs 975 cfPond 3: Surface 3 Primary=0.36 cfs 765 cf Secondary=0.01 cfs 211 cf Outflow=0.37 cfs 975 cf Peak Elev=177.36' Storage=6 cf Inflow=0.02 cfs 511 cfPond 3S: Subsurface 3 Outflow=0.02 cfs 510 cf Peak Elev=183.47' Storage=110 cf Inflow=0.38 cfs 1,211 cfPond 4: Surface 4 Primary=0.31 cfs 651 cf Secondary=0.02 cfs 561 cf Outflow=0.33 cfs 1,211 cf Peak Elev=178.27' Storage=10 cf Inflow=0.02 cfs 561 cfPond 4S: Subsurface 4 Outflow=0.02 cfs 560 cf Peak Elev=182.98' Storage=34 cf Inflow=0.34 cfs 735 cfPond 5: Surface 5 Primary=0.33 cfs 632 cf Secondary=0.01 cfs 102 cf Outflow=0.33 cfs 735 cf Peak Elev=177.78' Storage=3 cf Inflow=0.03 cfs 662 cfPond 5S: Subsurface 5 Outflow=0.03 cfs 662 cf Peak Elev=182.49' Storage=36 cf Inflow=0.35 cfs 728 cfPond 6: Surface 6 Primary=0.34 cfs 628 cf Secondary=0.01 cfs 100 cf Outflow=0.35 cfs 728 cf NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 261HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Peak Elev=177.30' Storage=3 cf Inflow=0.03 cfs 762 cfPond 6S: Subsurface 6 Outflow=0.03 cfs 761 cf Peak Elev=181.51' Storage=68 cf Inflow=0.40 cfs 861 cfPond 7: Surface 7 Primary=0.38 cfs 680 cf Secondary=0.01 cfs 181 cf Outflow=0.39 cfs 861 cf Peak Elev=177.17' Storage=48 cf Inflow=0.42 cfs 2,218 cfPond 7S: Subsurface 7 Outflow=0.38 cfs 2,217 cf Peak Elev=180.13' Storage=90 cf Inflow=0.45 cfs 982 cfPond 8: Surface 8 Primary=0.43 cfs 670 cf Secondary=0.02 cfs 312 cf Outflow=0.45 cfs 982 cf Peak Elev=175.64' Storage=48 cf Inflow=0.40 cfs 2,529 cfPond 8S: Subsurface 8 Outflow=0.37 cfs 2,528 cf Peak Elev=174.41' Storage=14 cf Inflow=0.61 cfs 1,997 cfPond 9: Surface 9 Primary=0.60 cfs 1,709 cf Secondary=0.01 cfs 288 cf Outflow=0.61 cfs 1,997 cf Peak Elev=170.73' Storage=10 cf Inflow=0.01 cfs 288 cfPond 9S: Subsurface 9 Outflow=0.01 cfs 286 cf Peak Elev=173.39' Storage=37 cf Inflow=0.51 cfs 1,624 cfPond 10: Surface 10 Primary=0.49 cfs 1,051 cf Secondary=0.01 cfs 573 cf Outflow=0.50 cfs 1,624 cf Peak Elev=168.74' Storage=6 cf Inflow=0.01 cfs 573 cfPond 10S: Subsurface 10 Outflow=0.01 cfs 572 cf Peak Elev=185.41' Storage=55 cf Inflow=0.34 cfs 1,524 cfPond 11: Surface 11 Primary=0.33 cfs 777 cf Secondary=0.01 cfs 747 cf Outflow=0.34 cfs 1,524 cf Peak Elev=183.33' Storage=19 cf Inflow=0.01 cfs 747 cfPond 11S: Subsurface 11 Outflow=0.02 cfs 747 cf Peak Elev=171.05' Storage=220 cf Inflow=0.59 cfs 3,392 cfPond 29P: Landscape Filter Outflow=0.51 cfs 3,388 cf Peak Elev=174.97' Storage=3 cf Inflow=0.01 cfs 230 cfPond 30P: Porous Pavers Outflow=0.01 cfs 229 cf Peak Elev=173.98' Inflow=0.48 cfs 1,753 cfPond 31P: Distribution Pipes Primary=0.28 cfs 1,653 cf Secondary=0.20 cfs 100 cf Outflow=0.48 cfs 1,753 cf Peak Elev=174.08' Inflow=0.50 cfs 1,842 cfPond 33P: Distribution Pipes Primary=0.31 cfs 1,739 cf Secondary=0.19 cfs 103 cf Outflow=0.50 cfs 1,842 cf Peak Elev=188.50' Storage=13 cf Inflow=0.01 cfs 404 cfPond PN: Porous Pavers 4.0" Round Culvert n=0.013 L=7.0' S=0.3471 '/' Outflow=0.01 cfs 402 cf Peak Elev=175.03' Storage=10 cf Inflow=0.03 cfs 1,141 cfPond PS: Porous Pavers Outflow=0.03 cfs 1,140 cf NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 262HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Inflow=3.35 cfs 14,448 cfLink 33L: On-site Closed Drainage Primary=3.35 cfs 14,448 cf Total Runoff Area = 41,329 sf Runoff Volume = 21,834 cf Average Runoff Depth = 6.34" 61.40% Pervious = 25,378 sf 38.60% Impervious = 15,951 sf NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 263HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR1: Basin 1 Runoff = 0.30 cfs @ 12.13 hrs, Volume= 995 cf, Depth= 6.22" Routed to Pond 1 : Surface 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 643 98 Site Impervious 1,275 80 >75% Grass cover, Good, HSG D 1,918 86 Weighted Average 1,275 66.48% Pervious Area 643 33.52% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR1: Basin 1 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=1,918 sf Runoff Volume=995 cf Runoff Depth=6.22" Tc=6.0 min CN=86 0.30 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 264HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR10: Basin 10 Runoff = 0.51 cfs @ 12.13 hrs, Volume= 1,624 cf, Depth= 5.76" Routed to Pond 10 : Surface 10 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 324 98 Site Impervious 3,062 80 >75% Grass cover, Good, HSG D 3,386 82 Weighted Average 3,062 90.43% Pervious Area 324 9.57% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR10: Basin 10 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=3,386 sf Runoff Volume=1,624 cf Runoff Depth=5.76" Tc=6.0 min CN=82 0.51 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 265HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR11: Basin 11 Runoff = 0.34 cfs @ 12.13 hrs, Volume= 1,122 cf, Depth= 6.11" Routed to Pond 11 : Surface 11 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 611 98 Site Impervious 1,593 80 >75% Grass cover, Good, HSG D 2,204 85 Weighted Average 1,593 72.28% Pervious Area 611 27.72% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR11: Basin 11 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=2,204 sf Runoff Volume=1,122 cf Runoff Depth=6.11" Tc=6.0 min CN=85 0.34 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 266HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR12: West site to Area Drain Runoff = 0.36 cfs @ 12.13 hrs, Volume= 1,147 cf, Depth= 5.52" Routed to Link 33L : On-site Closed Drainage Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 34 98 Site Impervious 2,459 80 >75% Grass cover, Good, HSG D 2,493 80 Weighted Average 2,459 98.64% Pervious Area 34 1.36% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR12: West site to Area Drain Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=2,493 sf Runoff Volume=1,147 cf Runoff Depth=5.52" Tc=6.0 min CN=80 0.36 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 267HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR13: Pavers front Runoff = 0.03 cfs @ 20.97 hrs, Volume= 1,141 cf, Depth= 5.76" Routed to Pond PS : Porous Pavers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 28 98 Site Impervious * 248 98 Permeable Pavers 2,103 80 >75% Grass cover, Good, HSG D 2,379 82 Weighted Average 2,103 88.40% Pervious Area 276 11.60% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 674.0 Direct Entry, Paver Tc Subcatchment PR13: Pavers front Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=2,379 sf Runoff Volume=1,141 cf Runoff Depth=5.76" Tc=674.0 min CN=82 0.03 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 268HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR14: Pavers North Runoff = 0.01 cfs @ 20.23 hrs, Volume= 404 cf, Depth= 7.17" Routed to Pond PN : Porous Pavers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 60 98 Site Impervious * 464 98 Porous Pavers 152 80 >75% Grass cover, Good, HSG D 676 94 Weighted Average 152 22.49% Pervious Area 524 77.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 674.0 Direct Entry, Pavers Tc Subcatchment PR14: Pavers North Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.009 0.009 0.008 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=676 sf Runoff Volume=404 cf Runoff Depth=7.17" Tc=674.0 min CN=94 0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 269HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR15a: Roof West Runoff = 0.48 cfs @ 12.13 hrs, Volume= 1,753 cf, Depth= 7.65" Routed to Pond 31P : Distribution Pipes Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 2,750 98 Roof 2,750 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR15a: Roof West Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.52 0.5 0.48 0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=2,750 sf Runoff Volume=1,753 cf Runoff Depth=7.65" Tc=6.0 min CN=98 0.48 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 270HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR15b: Roof East Runoff = 0.50 cfs @ 12.13 hrs, Volume= 1,842 cf, Depth= 7.65" Routed to Pond 33P : Distribution Pipes Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 2,889 98 Roof 2,889 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR15b: Roof East Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=2,889 sf Runoff Volume=1,842 cf Runoff Depth=7.65" Tc=6.0 min CN=98 0.50 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 271HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR16: Remainder of site Runoff = 2.22 cfs @ 12.13 hrs, Volume= 7,373 cf, Depth= 6.46" Routed to Reach DP-PR : Proposed Site Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 6,144 98 Site Impervious 7,550 80 >75% Grass cover, Good, HSG D 13,694 88 Weighted Average 7,550 55.13% Pervious Area 6,144 44.87% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR16: Remainder of site Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)2 1 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=13,694 sf Runoff Volume=7,373 cf Runoff Depth=6.46" Tc=6.0 min CN=88 2.22 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 272HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR17: Pavers path Runoff = 0.01 cfs @ 20.97 hrs, Volume= 230 cf, Depth= 6.22" Routed to Pond 30P : Porous Pavers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 150 98 Permeable Pavers 293 80 >75% Grass cover, Good, HSG D 443 86 Weighted Average 293 66.14% Pervious Area 150 33.86% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 674.0 Direct Entry, Paver Tc Subcatchment PR17: Pavers path Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=443 sf Runoff Volume=230 cf Runoff Depth=6.22" Tc=674.0 min CN=86 0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 273HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR2: Basin 2 Runoff = 0.02 cfs @ 12.13 hrs, Volume= 75 cf, Depth= 5.52" Routed to Pond 2 : Surface 2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description 164 80 >75% Grass cover, Good, HSG D 164 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR2: Basin 2 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.026 0.025 0.024 0.023 0.022 0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=164 sf Runoff Volume=75 cf Runoff Depth=5.52" Tc=6.0 min CN=80 0.02 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 274HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR3: Basin 3 Runoff = 0.06 cfs @ 12.13 hrs, Volume= 205 cf, Depth= 5.64" Routed to Pond 3 : Surface 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 14 98 Site Impervious 423 80 >75% Grass cover, Good, HSG D 437 81 Weighted Average 423 96.80% Pervious Area 14 3.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR3: Basin 3 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=437 sf Runoff Volume=205 cf Runoff Depth=5.64" Tc=6.0 min CN=81 0.06 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 275HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR4: Basin 4 Runoff = 0.38 cfs @ 12.13 hrs, Volume= 1,211 cf, Depth= 5.76" Routed to Pond 4 : Surface 4 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 253 98 Impervious 2,272 80 >75% Grass cover, Good, HSG D 2,525 82 Weighted Average 2,272 89.98% Pervious Area 253 10.02% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR4: Basin 4 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=2,525 sf Runoff Volume=1,211 cf Runoff Depth=5.76" Tc=6.0 min CN=82 0.38 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 276HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR5: Basin 5 Runoff = 0.03 cfs @ 12.13 hrs, Volume= 84 cf, Depth= 5.87" Routed to Pond 5 : Surface 5 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 31 98 Site Impervious 141 80 >75% Grass cover, Good, HSG D 172 83 Weighted Average 141 81.98% Pervious Area 31 18.02% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR5: Basin 5 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=172 sf Runoff Volume=84 cf Runoff Depth=5.87" Tc=6.0 min CN=83 0.03 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 277HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR6: Basin 6 Runoff = 0.03 cfs @ 12.13 hrs, Volume= 96 cf, Depth= 6.11" Routed to Pond 6 : Surface 6 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 57 98 Site Impervious 131 80 >75% Grass cover, Good, HSG D 188 85 Weighted Average 131 69.68% Pervious Area 57 30.32% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR6: Basin 6 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=188 sf Runoff Volume=96 cf Runoff Depth=6.11" Tc=6.0 min CN=85 0.03 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 278HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR7: Basin 7 Runoff = 0.07 cfs @ 12.13 hrs, Volume= 233 cf, Depth= 6.11" Routed to Pond 7 : Surface 7 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 120 98 Site Impervious 338 80 >75% Grass cover, Good, HSG D 458 85 Weighted Average 338 73.80% Pervious Area 120 26.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR7: Basin 7 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=458 sf Runoff Volume=233 cf Runoff Depth=6.11" Tc=6.0 min CN=85 0.07 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 279HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR8: Basin 8 Runoff = 0.09 cfs @ 12.13 hrs, Volume= 302 cf, Depth= 5.76" Routed to Pond 8 : Surface 8 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 64 98 Site Impervious 566 80 >75% Grass cover, Good, HSG D 630 82 Weighted Average 566 89.84% Pervious Area 64 10.16% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR8: Basin 8 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=630 sf Runoff Volume=302 cf Runoff Depth=5.76" Tc=6.0 min CN=82 0.09 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 280HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment PR9: Basin 9 Runoff = 0.61 cfs @ 12.13 hrs, Volume= 1,997 cf, Depth= 6.11" Routed to Pond 9 : Surface 9 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-YR Rainfall=7.89" Area (sf) CN Description * 1,067 98 Impervious 2,856 80 >75% Grass cover, Good, HSG D 3,923 85 Weighted Average 2,856 72.80% Pervious Area 1,067 27.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min Tc Subcatchment PR9: Basin 9 Runoff Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 NOAA 24-hr D 100-YR Rainfall=7.89" Runoff Area=3,923 sf Runoff Volume=1,997 cf Runoff Depth=6.11" Tc=6.0 min CN=85 0.61 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 281HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach DP-PR: Proposed Site [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 41,329 sf, 38.60% Impervious, Inflow Depth = 6.34" for 100-YR event Inflow = 5.55 cfs @ 12.14 hrs, Volume= 21,821 cf Outflow = 5.55 cfs @ 12.14 hrs, Volume= 21,821 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Reach DP-PR: Proposed Site Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)6 5 4 3 2 1 0 Inflow Area=41,329 sf 5.55 cfs5.55 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 282HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach P1: 4" Pipe Under Path [52] Hint: Inlet/Outlet conditions not evaluated Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 6.07" for 100-YR event Inflow = 0.38 cfs @ 12.15 hrs, Volume= 1,275 cf Outflow = 0.38 cfs @ 12.15 hrs, Volume= 1,275 cf, Atten= 0%, Lag= 0.0 min Routed to Pond 7S : Subsurface 7 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Max. Velocity= 6.21 fps, Min. Travel Time= 0.0 min Avg. Velocity = 2.03 fps, Avg. Travel Time= 0.1 min Peak Storage= 1 cf @ 12.15 hrs Average Depth at Peak Storage= 0.17' , Surface Width= 0.48' Bank-Full Depth= 0.50' Flow Area= 0.2 sf, Capacity= 1.45 cfs 6.0" Round Pipe n= 0.013 Corrugated PE, smooth interior Length= 15.0' Slope= 0.0667 '/' Inlet Invert= 177.18', Outlet Invert= 176.18' NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 283HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Reach P1: 4" Pipe Under Path Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,519 sf Avg. Flow Depth=0.17' Max Vel=6.21 fps 6.0" Round Pipe n=0.013 L=15.0' S=0.0667 '/' Capacity=1.45 cfs 0.38 cfs0.38 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 284HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach P2: 8" Pipe [52] Hint: Inlet/Outlet conditions not evaluated Inflow Area = 6,492 sf, 18.21% Impervious, Inflow Depth = 5.91" for 100-YR event Inflow = 0.79 cfs @ 12.19 hrs, Volume= 3,199 cf Outflow = 0.79 cfs @ 12.20 hrs, Volume= 3,199 cf, Atten= 0%, Lag= 0.3 min Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Max. Velocity= 4.07 fps, Min. Travel Time= 0.3 min Avg. Velocity = 1.31 fps, Avg. Travel Time= 0.8 min Peak Storage= 13 cf @ 12.20 hrs Average Depth at Peak Storage= 0.36' , Surface Width= 0.66' Bank-Full Depth= 0.67' Flow Area= 0.3 sf, Capacity= 1.37 cfs 8.0" Round Pipe n= 0.013 Corrugated PE, smooth interior Length= 65.0' Slope= 0.0129 '/' Inlet Invert= 174.50', Outlet Invert= 173.66' NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 285HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Reach P2: 8" Pipe Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=6,492 sf Avg. Flow Depth=0.36' Max Vel=4.07 fps 8.0" Round Pipe n=0.013 L=65.0' S=0.0129 '/' Capacity=1.37 cfs 0.79 cfs0.79 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 286HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Reach P3: 4" Outlet Pipe [52] Hint: Inlet/Outlet conditions not evaluated [80] Warning: Exceeded Pond 11S by 0.01' @ 12.12 hrs (0.02 cfs 5 cf) Inflow Area = 2,880 sf, 39.41% Impervious, Inflow Depth = 6.35" for 100-YR event Inflow = 0.33 cfs @ 12.14 hrs, Volume= 1,524 cf Outflow = 0.33 cfs @ 12.14 hrs, Volume= 1,524 cf, Atten= 0%, Lag= 0.2 min Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Max. Velocity= 6.24 fps, Min. Travel Time= 0.4 min Avg. Velocity = 1.68 fps, Avg. Travel Time= 1.3 min Peak Storage= 7 cf @ 12.14 hrs Average Depth at Peak Storage= 0.16' , Surface Width= 0.46' Bank-Full Depth= 0.50' Flow Area= 0.2 sf, Capacity= 1.53 cfs 6.0" Round Pipe n= 0.013 Corrugated PE, smooth interior Length= 136.0' Slope= 0.0748 '/' Inlet Invert= 183.17', Outlet Invert= 173.00' NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 287HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Reach P3: 4" Outlet Pipe Inflow Outflow Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,880 sf Avg. Flow Depth=0.16' Max Vel=6.24 fps 6.0" Round Pipe n=0.013 L=136.0' S=0.0748 '/' Capacity=1.53 cfs 0.33 cfs0.33 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 288HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1: Surface 1 Inflow Area = 1,918 sf, 33.52% Impervious, Inflow Depth = 6.22" for 100-YR event Inflow = 0.30 cfs @ 12.13 hrs, Volume= 995 cf Outflow = 0.30 cfs @ 12.14 hrs, Volume= 995 cf, Atten= 1%, Lag= 0.6 min Primary = 0.29 cfs @ 12.14 hrs, Volume= 858 cf Routed to Pond 2 : Surface 2 Secondary = 0.00 cfs @ 12.14 hrs, Volume= 137 cf Routed to Pond 1S : Subsurface 1 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 183.45' @ 12.14 hrs Surf.Area= 51 sf Storage= 20 cf Plug-Flow detention time= 6.7 min calculated for 995 cf (100% of inflow) Center-of-Mass det. time= 6.7 min ( 800.2 - 793.5 ) Volume Invert Avail.Storage Storage Description #1 182.50' 23 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.50 2 0 0 183.00 17 5 5 183.51 55 18 23 Device Routing Invert Outlet Devices #1 Secondary 182.50'4.000 in/hr Exfiltration over Surface area #2 Primary 183.50'8.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 183.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 183.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.29 cfs @ 12.14 hrs HW=183.45' TW=182.96' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.17 cfs @ 2.74 fps) 4=Orifice/Grate (Orifice Controls 0.12 cfs @ 1.45 fps) Secondary OutFlow Max=0.00 cfs @ 12.14 hrs HW=183.45' TW=178.21' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.00 cfs) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 289HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 1: Surface 1 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=1,918 sf Peak Elev=183.45' Storage=20 cf 0.30 cfs0.30 cfs0.29 cfs 0.00 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 290HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 1S: Subsurface 1 Inflow = 0.00 cfs @ 12.14 hrs, Volume= 137 cf Outflow = 0.00 cfs @ 12.16 hrs, Volume= 136 cf, Atten= 2%, Lag= 1.4 min Primary = 0.00 cfs @ 12.16 hrs, Volume= 136 cf Routed to Pond 2S : Subsurface 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 178.21' @ 12.16 hrs Surf.Area= 52 sf Storage= 1 cf Plug-Flow detention time= 7.4 min calculated for 136 cf (100% of inflow) Center-of-Mass det. time= 6.4 min ( 893.5 - 887.1 ) Volume Invert Avail.Storage Storage Description #1 178.16' 48 cf Custom Stage Data (Prismatic) Listed below (Recalc) 122 cf Overall - 1 cf Embedded = 121 cf x 40.0% Voids #2 178.17' 1 cf 4.0" Round Pipe Storage Inside #1 L= 11.8' 49 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 178.16 52 0 0 180.50 52 122 122 Device Routing Invert Outlet Devices #1 Primary 178.17'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.00 cfs @ 12.16 hrs HW=178.21' TW=177.73' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.00 cfs @ 0.70 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 291HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 1S: Subsurface 1 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.005 0.005 0.005 0.005 0.004 0.004 0.004 0.004 0.004 0.003 0.003 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0 Peak Elev=178.21' Storage=1 cf 0.00 cfs0.00 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 292HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2: Surface 2 Inflow Area = 2,082 sf, 30.88% Impervious, Inflow Depth = 5.38" for 100-YR event Inflow = 0.32 cfs @ 12.14 hrs, Volume= 934 cf Outflow = 0.31 cfs @ 12.15 hrs, Volume= 934 cf, Atten= 1%, Lag= 0.7 min Primary = 0.31 cfs @ 12.15 hrs, Volume= 770 cf Routed to Pond 3 : Surface 3 Secondary = 0.01 cfs @ 12.15 hrs, Volume= 164 cf Routed to Pond 2S : Subsurface 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 182.97' @ 12.15 hrs Surf.Area= 57 sf Storage= 26 cf Plug-Flow detention time= 8.8 min calculated for 934 cf (100% of inflow) Center-of-Mass det. time= 8.8 min ( 797.1 - 788.3 ) Volume Invert Avail.Storage Storage Description #1 182.00' 28 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.00 2 0 0 182.50 25 7 7 183.01 60 22 28 Device Routing Invert Outlet Devices #1 Secondary 182.00'4.000 in/hr Exfiltration over Surface area #2 Primary 183.00'8.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 182.50'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 182.75'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.31 cfs @ 12.15 hrs HW=182.97' TW=181.91' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.17 cfs @ 2.79 fps) 4=Orifice/Grate (Orifice Controls 0.13 cfs @ 1.49 fps) Secondary OutFlow Max=0.01 cfs @ 12.15 hrs HW=182.97' TW=177.73' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 293HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 2: Surface 2 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,082 sf Peak Elev=182.97' Storage=26 cf 0.32 cfs0.31 cfs0.31 cfs 0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 294HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 2S: Subsurface 2 Inflow = 0.01 cfs @ 12.16 hrs, Volume= 300 cf Outflow = 0.01 cfs @ 12.18 hrs, Volume= 300 cf, Atten= 1%, Lag= 1.2 min Primary = 0.01 cfs @ 12.18 hrs, Volume= 300 cf Routed to Pond 3S : Subsurface 3 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.73' @ 12.18 hrs Surf.Area= 57 sf Storage= 2 cf Plug-Flow detention time= 5.1 min calculated for 300 cf (100% of inflow) Center-of-Mass det. time= 4.5 min ( 928.7 - 924.2 ) Volume Invert Avail.Storage Storage Description #1 177.66' 53 cf Custom Stage Data (Prismatic) Listed below (Recalc) 133 cf Overall - 1 cf Embedded = 133 cf x 40.0% Voids #2 177.67' 1 cf 4.0" Round Pipe Storage Inside #1 L= 10.0' 54 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.66 57 0 0 180.00 57 133 133 Device Routing Invert Outlet Devices #1 Primary 177.67'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.18 hrs HW=177.73' TW=177.36' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.85 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 295HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 2S: Subsurface 2 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.011 0.01 0.01 0.009 0.009 0.008 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Peak Elev=177.73' Storage=2 cf 0.01 cfs0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 296HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 3: Surface 3 Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 4.65" for 100-YR event Inflow = 0.37 cfs @ 12.15 hrs, Volume= 975 cf Outflow = 0.37 cfs @ 12.15 hrs, Volume= 975 cf, Atten= 0%, Lag= 0.2 min Primary = 0.36 cfs @ 12.15 hrs, Volume= 765 cf Routed to Reach P1 : 4" Pipe Under Path Secondary = 0.01 cfs @ 12.15 hrs, Volume= 211 cf Routed to Pond 3S : Subsurface 3 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 181.91' @ 12.15 hrs Surf.Area= 61 sf Storage= 16 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 6.5 min ( 780.1 - 773.6 ) Volume Invert Avail.Storage Storage Description #1 181.50' 22 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 181.50 15 0 0 182.00 71 22 22 Device Routing Invert Outlet Devices #1 Secondary 181.50'4.000 in/hr Exfiltration over Surface area #2 Primary 181.80'12inch-Dome Grate Capacity Primary OutFlow Max=0.36 cfs @ 12.15 hrs HW=181.91' TW=177.35' (Dynamic Tailwater) 2=12inch-Dome Grate Capacity (Custom Controls 0.36 cfs) Secondary OutFlow Max=0.01 cfs @ 12.15 hrs HW=181.91' TW=177.36' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 297HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 3: Surface 3 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,519 sf Peak Elev=181.91' Storage=16 cf 0.37 cfs0.37 cfs0.36 cfs 0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 298HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 3S: Subsurface 3 [90] Warning: Qout>Qin may require smaller dt or Finer Routing [87] Warning: Oscillations may require smaller dt or Finer Routing (severity=2) Inflow = 0.02 cfs @ 12.17 hrs, Volume= 511 cf Outflow = 0.02 cfs @ 12.21 hrs, Volume= 510 cf, Atten= 0%, Lag= 2.3 min Primary = 0.02 cfs @ 12.21 hrs, Volume= 510 cf Routed to Reach P1 : 4" Pipe Under Path Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.36' @ 12.16 hrs Surf.Area= 71 sf Storage= 6 cf Plug-Flow detention time= 4.8 min calculated for 510 cf (100% of inflow) Center-of-Mass det. time= 4.5 min ( 926.7 - 922.2 ) Volume Invert Avail.Storage Storage Description #1 177.17' 66 cf Custom Stage Data (Prismatic) Listed below (Recalc) 165 cf Overall - 1 cf Embedded = 164 cf x 40.0% Voids #2 177.18' 1 cf 4.0" Round Pipe Storage Inside #1 L= 17.0' 67 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.17 71 0 0 179.50 71 165 165 Device Routing Invert Outlet Devices #1 Primary 177.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 12.21 hrs HW=177.34' TW=177.33' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 0.47 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 299HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 3S: Subsurface 3 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=177.36' Storage=6 cf0.02 cfs 0.02 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 300HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 4: Surface 4 Inflow Area = 2,525 sf, 10.02% Impervious, Inflow Depth = 5.76" for 100-YR event Inflow = 0.38 cfs @ 12.13 hrs, Volume= 1,211 cf Outflow = 0.33 cfs @ 12.16 hrs, Volume= 1,211 cf, Atten= 11%, Lag= 2.0 min Primary = 0.31 cfs @ 12.16 hrs, Volume= 651 cf Routed to Pond 5 : Surface 5 Secondary = 0.02 cfs @ 12.16 hrs, Volume= 561 cf Routed to Pond 4S : Subsurface 4 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 183.47' @ 12.16 hrs Surf.Area= 220 sf Storage= 110 cf Plug-Flow detention time= 21.2 min calculated for 1,211 cf (100% of inflow) Center-of-Mass det. time= 21.2 min ( 826.3 - 805.0 ) Volume Invert Avail.Storage Storage Description #1 182.50' 119 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.50 14 0 0 183.00 114 32 32 183.51 229 87 119 Device Routing Invert Outlet Devices #1 Secondary 182.50'4.000 in/hr Exfiltration over Surface area #2 Primary 183.50'7.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 183.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 183.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.31 cfs @ 12.16 hrs HW=183.47' TW=182.98' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.18 cfs @ 2.81 fps) 4=Orifice/Grate (Orifice Controls 0.14 cfs @ 1.50 fps) Secondary OutFlow Max=0.02 cfs @ 12.16 hrs HW=183.47' TW=178.27' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.02 cfs) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 301HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 4: Surface 4 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,525 sf Peak Elev=183.47' Storage=110 cf 0.38 cfs 0.33 cfs 0.31 cfs 0.02 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 302HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 4S: Subsurface 4 Inflow = 0.02 cfs @ 12.16 hrs, Volume= 561 cf Outflow = 0.02 cfs @ 12.21 hrs, Volume= 560 cf, Atten= 4%, Lag= 3.1 min Primary = 0.02 cfs @ 12.21 hrs, Volume= 560 cf Routed to Pond 5S : Subsurface 5 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 178.27' @ 12.21 hrs Surf.Area= 229 sf Storage= 10 cf Plug-Flow detention time= 13.3 min calculated for 560 cf (100% of inflow) Center-of-Mass det. time= 12.3 min ( 932.5 - 920.2 ) Volume Invert Avail.Storage Storage Description #1 178.17' 212 cf Custom Stage Data (Prismatic) Listed below (Recalc) 534 cf Overall - 3 cf Embedded = 530 cf x 40.0% Voids #2 178.18' 3 cf 4.0" Round Pipe Storage Inside #1 L= 36.0' 215 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 178.17 229 0 0 180.50 229 534 534 Device Routing Invert Outlet Devices #1 Primary 178.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 12.21 hrs HW=178.27' TW=177.78' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 1.02 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 303HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 4S: Subsurface 4 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.022 0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=178.27' Storage=10 cf 0.02 cfs 0.02 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 304HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 5: Surface 5 Inflow Area = 2,697 sf, 10.53% Impervious, Inflow Depth = 3.27" for 100-YR event Inflow = 0.34 cfs @ 12.16 hrs, Volume= 735 cf Outflow = 0.33 cfs @ 12.17 hrs, Volume= 735 cf, Atten= 2%, Lag= 0.9 min Primary = 0.33 cfs @ 12.17 hrs, Volume= 632 cf Routed to Pond 6 : Surface 6 Secondary = 0.01 cfs @ 12.17 hrs, Volume= 102 cf Routed to Pond 5S : Subsurface 5 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 182.98' @ 12.17 hrs Surf.Area= 66 sf Storage= 34 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 6.3 min ( 758.1 - 751.9 ) Volume Invert Avail.Storage Storage Description #1 182.00' 36 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 182.00 2 0 0 182.50 36 10 10 183.01 68 27 36 Device Routing Invert Outlet Devices #1 Secondary 182.00'4.000 in/hr Exfiltration over Surface area #2 Primary 183.00'7.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 182.50'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 182.75'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.33 cfs @ 12.17 hrs HW=182.98' TW=182.49' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.18 cfs @ 2.85 fps) 4=Orifice/Grate (Orifice Controls 0.15 cfs @ 1.54 fps) Secondary OutFlow Max=0.01 cfs @ 12.17 hrs HW=182.98' TW=177.78' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 305HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 5: Surface 5 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,697 sf Peak Elev=182.98' Storage=34 cf 0.34 cfs0.33 cfs0.33 cfs 0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 306HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 5S: Subsurface 5 Inflow = 0.03 cfs @ 12.20 hrs, Volume= 662 cf Outflow = 0.03 cfs @ 12.22 hrs, Volume= 662 cf, Atten= 0%, Lag= 1.1 min Primary = 0.03 cfs @ 12.22 hrs, Volume= 662 cf Routed to Pond 6S : Subsurface 6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.78' @ 12.22 hrs Surf.Area= 68 sf Storage= 3 cf Plug-Flow detention time= 3.7 min calculated for 662 cf (100% of inflow) Center-of-Mass det. time= 3.3 min ( 923.3 - 920.0 ) Volume Invert Avail.Storage Storage Description #1 177.67' 63 cf Custom Stage Data (Prismatic) Listed below (Recalc) 158 cf Overall - 1 cf Embedded = 157 cf x 40.0% Voids #2 177.68' 1 cf 4.0" Round Pipe Storage Inside #1 L= 12.0' 64 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.67 68 0 0 180.00 68 158 158 Device Routing Invert Outlet Devices #1 Primary 177.68'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.03 cfs @ 12.22 hrs HW=177.78' TW=177.30' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.03 cfs @ 1.10 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 307HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 5S: Subsurface 5 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 Peak Elev=177.78' Storage=3 cf 0.03 cfs0.03 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 308HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 6: Surface 6 Inflow Area = 2,885 sf, 11.82% Impervious, Inflow Depth = 3.03" for 100-YR event Inflow = 0.35 cfs @ 12.17 hrs, Volume= 728 cf Outflow = 0.35 cfs @ 12.18 hrs, Volume= 728 cf, Atten= 1%, Lag= 0.8 min Primary = 0.34 cfs @ 12.18 hrs, Volume= 628 cf Routed to Pond 7 : Surface 7 Secondary = 0.01 cfs @ 12.18 hrs, Volume= 100 cf Routed to Pond 6S : Subsurface 6 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 182.49' @ 12.18 hrs Surf.Area= 62 sf Storage= 36 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 6.0 min ( 756.0 - 750.0 ) Volume Invert Avail.Storage Storage Description #1 181.50' 37 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 181.50 2 0 0 182.00 40 11 11 182.51 63 26 37 Device Routing Invert Outlet Devices #1 Secondary 181.50'4.000 in/hr Exfiltration over Surface area #2 Primary 182.50'9.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 182.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 182.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.34 cfs @ 12.18 hrs HW=182.49' TW=181.51' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.18 cfs @ 2.90 fps) 4=Orifice/Grate (Orifice Controls 0.16 cfs @ 1.58 fps) Secondary OutFlow Max=0.01 cfs @ 12.18 hrs HW=182.49' TW=177.29' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 309HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 6: Surface 6 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,885 sf Peak Elev=182.49' Storage=36 cf 0.35 cfs0.35 cfs0.34 cfs 0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 310HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 6S: Subsurface 6 Inflow = 0.03 cfs @ 12.21 hrs, Volume= 762 cf Outflow = 0.03 cfs @ 12.23 hrs, Volume= 761 cf, Atten= 0%, Lag= 1.0 min Primary = 0.03 cfs @ 12.23 hrs, Volume= 761 cf Routed to Pond 7S : Subsurface 7 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.30' @ 12.23 hrs Surf.Area= 63 sf Storage= 3 cf Plug-Flow detention time= 3.2 min calculated for 761 cf (100% of inflow) Center-of-Mass det. time= 2.9 min ( 915.5 - 912.6 ) Volume Invert Avail.Storage Storage Description #1 177.17' 58 cf Custom Stage Data (Prismatic) Listed below (Recalc) 147 cf Overall - 1 cf Embedded = 146 cf x 40.0% Voids #2 177.18' 1 cf 4.0" Round Pipe Storage Inside #1 L= 13.0' 59 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 177.17 63 0 0 179.50 63 147 147 Device Routing Invert Outlet Devices #1 Primary 177.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.03 cfs @ 12.23 hrs HW=177.30' TW=177.05' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.03 cfs @ 1.16 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 311HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 6S: Subsurface 6 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.034 0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 Peak Elev=177.30' Storage=3 cf 0.03 cfs0.03 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 312HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 7: Surface 7 Inflow Area = 3,343 sf, 13.79% Impervious, Inflow Depth = 3.09" for 100-YR event Inflow = 0.40 cfs @ 12.17 hrs, Volume= 861 cf Outflow = 0.39 cfs @ 12.18 hrs, Volume= 861 cf, Atten= 0%, Lag= 0.7 min Primary = 0.38 cfs @ 12.18 hrs, Volume= 680 cf Routed to Pond 8 : Surface 8 Secondary = 0.01 cfs @ 12.18 hrs, Volume= 181 cf Routed to Pond 7S : Subsurface 7 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 181.51' @ 12.18 hrs Surf.Area= 117 sf Storage= 68 cf Plug-Flow detention time= 13.4 min calculated for 861 cf (100% of inflow) Center-of-Mass det. time= 13.4 min ( 770.4 - 757.0 ) Volume Invert Avail.Storage Storage Description #1 180.00' 69 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 180.00 2 0 0 180.50 18 5 5 181.00 58 19 24 181.51 117 45 69 Device Routing Invert Outlet Devices #1 Secondary 180.00'4.000 in/hr Exfiltration over Surface area #2 Primary 181.50'10.5' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Primary 181.00'3.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 181.25'5.0" W x 3.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.38 cfs @ 12.18 hrs HW=181.51' TW=180.13' (Dynamic Tailwater) 2=Sharp-Crested Rectangular Weir (Weir Controls 0.02 cfs @ 0.28 fps) 3=Orifice/Grate (Orifice Controls 0.19 cfs @ 2.96 fps) 4=Orifice/Grate (Orifice Controls 0.17 cfs @ 1.67 fps) Secondary OutFlow Max=0.01 cfs @ 12.18 hrs HW=181.51' TW=177.16' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 313HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 7: Surface 7 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=3,343 sf Peak Elev=181.51' Storage=68 cf 0.40 cfs0.39 cfs0.38 cfs 0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 314HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 7S: Subsurface 7 [62] Hint: Exceeded Reach P1 OUTLET depth by 0.82' @ 12.19 hrs Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 10.56" for 100-YR event Inflow = 0.42 cfs @ 12.15 hrs, Volume= 2,218 cf Outflow = 0.38 cfs @ 12.19 hrs, Volume= 2,217 cf, Atten= 9%, Lag= 2.0 min Primary = 0.38 cfs @ 12.19 hrs, Volume= 2,217 cf Routed to Pond 8S : Subsurface 8 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 177.17' @ 12.19 hrs Surf.Area= 117 sf Storage= 48 cf Plug-Flow detention time= 3.5 min calculated for 2,217 cf (100% of inflow) Center-of-Mass det. time= 3.1 min ( 858.5 - 855.4 ) Volume Invert Avail.Storage Storage Description #1 176.17' 108 cf Custom Stage Data (Prismatic) Listed below (Recalc) 273 cf Overall - 2 cf Embedded = 271 cf x 40.0% Voids #2 176.18' 2 cf 4.0" Round Pipe Storage Inside #1 L= 21.0' 110 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 176.17 117 0 0 178.50 117 273 273 Device Routing Invert Outlet Devices #1 Primary 176.18'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.38 cfs @ 12.19 hrs HW=177.17' TW=175.56' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.38 cfs @ 4.36 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 315HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 7S: Subsurface 7 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,519 sf Peak Elev=177.17' Storage=48 cf 0.42 cfs 0.38 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 316HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 8: Surface 8 Inflow Area = 3,973 sf, 13.21% Impervious, Inflow Depth = 2.97" for 100-YR event Inflow = 0.45 cfs @ 12.18 hrs, Volume= 982 cf Outflow = 0.45 cfs @ 12.19 hrs, Volume= 982 cf, Atten= 1%, Lag= 0.5 min Primary = 0.43 cfs @ 12.19 hrs, Volume= 670 cf Routed to Reach P2 : 8" Pipe Secondary = 0.02 cfs @ 12.19 hrs, Volume= 312 cf Routed to Pond 8S : Subsurface 8 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 180.13' @ 12.19 hrs Surf.Area= 172 sf Storage= 90 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 18.7 min ( 780.6 - 761.9 ) Volume Invert Avail.Storage Storage Description #1 179.00' 164 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 179.00 7 0 0 179.50 49 14 14 179.75 120 21 35 180.50 223 129 164 Device Routing Invert Outlet Devices #1 Secondary 179.00'4.000 in/hr Exfiltration over Surface area #2 Primary 180.00'12inch-Dome Grate Capacity Primary OutFlow Max=0.43 cfs @ 12.19 hrs HW=180.13' TW=174.86' (Dynamic Tailwater) 2=12inch-Dome Grate Capacity (Custom Controls 0.43 cfs) Secondary OutFlow Max=0.02 cfs @ 12.19 hrs HW=180.13' TW=175.56' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.02 cfs) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 317HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 8: Surface 8 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.5 0.48 0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=3,973 sf Peak Elev=180.13' Storage=90 cf 0.45 cfs0.45 cfs 0.43 cfs 0.02 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 318HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 8S: Subsurface 8 Inflow Area = 2,519 sf, 26.08% Impervious, Inflow Depth = 12.05" for 100-YR event Inflow = 0.40 cfs @ 12.19 hrs, Volume= 2,529 cf Outflow = 0.37 cfs @ 12.23 hrs, Volume= 2,528 cf, Atten= 6%, Lag= 2.6 min Primary = 0.37 cfs @ 12.23 hrs, Volume= 2,528 cf Routed to Reach P2 : 8" Pipe Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 175.64' @ 12.23 hrs Surf.Area= 120 sf Storage= 48 cf Plug-Flow detention time= 3.4 min calculated for 2,528 cf (100% of inflow) Center-of-Mass det. time= 3.0 min ( 862.4 - 859.4 ) Volume Invert Avail.Storage Storage Description #1 174.67' 111 cf Custom Stage Data (Prismatic) Listed below (Recalc) 280 cf Overall - 2 cf Embedded = 278 cf x 40.0% Voids #2 174.68' 2 cf 4.0" Round Pipe Storage Inside #1 L= 24.0' 113 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.67 120 0 0 177.00 120 280 280 Device Routing Invert Outlet Devices #1 Primary 174.68'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.37 cfs @ 12.23 hrs HW=175.63' TW=174.85' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.37 cfs @ 4.25 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 319HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 8S: Subsurface 8 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,519 sf Peak Elev=175.64' Storage=48 cf 0.40 cfs 0.37 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 320HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 9: Surface 9 Inflow Area = 3,923 sf, 27.20% Impervious, Inflow Depth = 6.11" for 100-YR event Inflow = 0.61 cfs @ 12.13 hrs, Volume= 1,997 cf Outflow = 0.61 cfs @ 12.13 hrs, Volume= 1,997 cf, Atten= 0%, Lag= 0.2 min Primary = 0.60 cfs @ 12.13 hrs, Volume= 1,709 cf Routed to Link 33L : On-site Closed Drainage Secondary = 0.01 cfs @ 12.13 hrs, Volume= 288 cf Routed to Pond 9S : Subsurface 9 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 174.41' @ 12.13 hrs Surf.Area= 70 sf Storage= 14 cf Plug-Flow detention time= 3.3 min calculated for 1,996 cf (100% of inflow) Center-of-Mass det. time= 3.4 min ( 799.8 - 796.5 ) Volume Invert Avail.Storage Storage Description #1 174.00' 86 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.00 1 0 0 175.00 170 86 86 Device Routing Invert Outlet Devices #1 Primary 174.25'12inch-Dome Grate Capacity #2 Secondary 174.00'4.000 in/hr Exfiltration over Surface area Primary OutFlow Max=0.60 cfs @ 12.13 hrs HW=174.41' TW=0.00' (Dynamic Tailwater) 1=12inch-Dome Grate Capacity (Custom Controls 0.60 cfs) Secondary OutFlow Max=0.01 cfs @ 12.13 hrs HW=174.41' TW=170.73' (Dynamic Tailwater) 2=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 321HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 9: Surface 9 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=3,923 sf Peak Elev=174.41' Storage=14 cf 0.61 cfs0.61 cfs0.60 cfs 0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 322HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 9S: Subsurface 9 Inflow = 0.01 cfs @ 12.13 hrs, Volume= 288 cf Outflow = 0.01 cfs @ 12.21 hrs, Volume= 286 cf, Atten= 12%, Lag= 4.9 min Primary = 0.01 cfs @ 12.21 hrs, Volume= 286 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 170.73' @ 12.21 hrs Surf.Area= 170 sf Storage= 10 cf Plug-Flow detention time= 37.2 min calculated for 286 cf (99% of inflow) Center-of-Mass det. time= 34.0 min ( 922.5 - 888.6 ) Volume Invert Avail.Storage Storage Description #1 170.67' 395 cf Custom Stage Data (Prismatic) Listed below (Recalc) 396 cf Overall - 1 cf Embedded = 395 cf #2 170.68' 1 cf 4.0" Round Pipe Storage Inside #1 L= 17.0' 396 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 170.67 170 0 0 173.00 170 396 396 Device Routing Invert Outlet Devices #1 Primary 170.68'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.21 hrs HW=170.73' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.74 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 323HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 9S: Subsurface 9 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.007 0.007 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Peak Elev=170.73' Storage=10 cf 0.01 cfs 0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 324HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 10: Surface 10 Inflow Area = 3,386 sf, 9.57% Impervious, Inflow Depth = 5.76" for 100-YR event Inflow = 0.51 cfs @ 12.13 hrs, Volume= 1,624 cf Outflow = 0.50 cfs @ 12.14 hrs, Volume= 1,624 cf, Atten= 0%, Lag= 0.4 min Primary = 0.49 cfs @ 12.14 hrs, Volume= 1,051 cf Routed to Link 33L : On-site Closed Drainage Secondary = 0.01 cfs @ 12.14 hrs, Volume= 573 cf Routed to Pond 10S : Subsurface 10 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 173.39' @ 12.14 hrs Surf.Area= 125 sf Storage= 37 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 11.0 min ( 816.0 - 805.0 ) Volume Invert Avail.Storage Storage Description #1 173.00' 142 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 173.00 68 0 0 174.00 215 142 142 Device Routing Invert Outlet Devices #1 Primary 173.25'12inch-Dome Grate Capacity #2 Secondary 173.00'4.000 in/hr Exfiltration over Surface area Primary OutFlow Max=0.49 cfs @ 12.14 hrs HW=173.39' TW=0.00' (Dynamic Tailwater) 1=12inch-Dome Grate Capacity (Custom Controls 0.49 cfs) Secondary OutFlow Max=0.01 cfs @ 12.14 hrs HW=173.39' TW=168.74' (Dynamic Tailwater) 2=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 325HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 10: Surface 10 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=3,386 sf Peak Elev=173.39' Storage=37 cf 0.51 cfs0.50 cfs0.49 cfs 0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 326HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 10S: Subsurface 10 Inflow = 0.01 cfs @ 12.14 hrs, Volume= 573 cf Outflow = 0.01 cfs @ 12.18 hrs, Volume= 572 cf, Atten= 2%, Lag= 2.4 min Primary = 0.01 cfs @ 12.18 hrs, Volume= 572 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 168.74' @ 12.18 hrs Surf.Area= 215 sf Storage= 6 cf Plug-Flow detention time= 11.2 min calculated for 572 cf (100% of inflow) Center-of-Mass det. time= 10.2 min ( 948.1 - 937.8 ) Volume Invert Avail.Storage Storage Description #1 168.67' 200 cf Custom Stage Data (Prismatic) Listed below (Recalc) 501 cf Overall - 2 cf Embedded = 499 cf x 40.0% Voids #2 168.68' 2 cf 4.0" Round Pipe Storage Inside #1 L= 18.0' 201 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 168.67 215 0 0 171.00 215 501 501 Device Routing Invert Outlet Devices #1 Primary 168.68'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.18 hrs HW=168.74' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.84 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 327HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 10S: Subsurface 10 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.013 0.012 0.011 0.011 0.01 0.01 0.009 0.009 0.008 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Peak Elev=168.74' Storage=6 cf 0.01 cfs0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 328HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 11: Surface 11 Inflow Area = 2,880 sf, 39.41% Impervious, Inflow Depth = 6.35" for 100-YR event Inflow = 0.34 cfs @ 12.13 hrs, Volume= 1,524 cf Outflow = 0.34 cfs @ 12.14 hrs, Volume= 1,524 cf, Atten= 0%, Lag= 0.4 min Primary = 0.33 cfs @ 12.14 hrs, Volume= 777 cf Routed to Reach P3 : 4" Outlet Pipe Secondary = 0.01 cfs @ 12.14 hrs, Volume= 747 cf Routed to Pond 11S : Subsurface 11 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 185.41' @ 12.14 hrs Surf.Area= 119 sf Storage= 55 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= 32.0 min ( 993.8 - 961.7 ) Volume Invert Avail.Storage Storage Description #1 184.50' 284 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 184.50 23 0 0 185.00 56 20 20 186.00 211 134 153 186.50 310 130 284 Device Routing Invert Outlet Devices #1 Secondary 184.50'4.000 in/hr Exfiltration over Surface area #2 Primary 185.30'12inch-Dome Grate Capacity Primary OutFlow Max=0.33 cfs @ 12.14 hrs HW=185.41' TW=183.33' (Dynamic Tailwater) 2=12inch-Dome Grate Capacity (Custom Controls 0.33 cfs) Secondary OutFlow Max=0.01 cfs @ 12.14 hrs HW=185.41' TW=183.32' (Dynamic Tailwater) 1=Exfiltration (Exfiltration Controls 0.01 cfs) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 329HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 11: Surface 11 Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,880 sf Peak Elev=185.41' Storage=55 cf 0.34 cfs0.34 cfs0.33 cfs 0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 330HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 11S: Subsurface 11 [90] Warning: Qout>Qin may require smaller dt or Finer Routing Inflow = 0.01 cfs @ 12.14 hrs, Volume= 747 cf Outflow = 0.02 cfs @ 12.22 hrs, Volume= 747 cf, Atten= 0%, Lag= 5.2 min Primary = 0.02 cfs @ 12.22 hrs, Volume= 747 cf Routed to Reach P3 : 4" Outlet Pipe Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 183.33' @ 12.17 hrs Surf.Area= 310 sf Storage= 19 cf Plug-Flow detention time= 18.2 min calculated for 747 cf (100% of inflow) Center-of-Mass det. time= 17.9 min ( 1,199.9 - 1,182.0 ) Volume Invert Avail.Storage Storage Description #1 183.17' 289 cf Custom Stage Data (Prismatic) Listed below (Recalc) 722 cf Overall x 40.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 183.17 310 0 0 185.50 310 722 722 Device Routing Invert Outlet Devices #1 Primary 183.17'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 12.22 hrs HW=183.31' TW=183.30' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.02 cfs @ 0.64 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 331HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 11S: Subsurface 11 Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.025 0.024 0.023 0.022 0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 Peak Elev=183.33' Storage=19 cf 0.01 cfs 0.02 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 332HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 29P: Landscape Filter Inflow Area = 5,639 sf,100.00% Impervious, Inflow Depth = 7.22" for 100-YR event Inflow = 0.59 cfs @ 12.13 hrs, Volume= 3,392 cf Outflow = 0.51 cfs @ 12.18 hrs, Volume= 3,388 cf, Atten= 13%, Lag= 3.4 min Primary = 0.51 cfs @ 12.18 hrs, Volume= 3,388 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 171.05' @ 12.18 hrs Surf.Area= 1,000 sf Storage= 220 cf Plug-Flow detention time= 18.9 min calculated for 3,387 cf (100% of inflow) Center-of-Mass det. time= 18.3 min ( 761.5 - 743.1 ) Volume Invert Avail.Storage Storage Description #1 170.50' 1,000 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 170.50 1,000 0.0 0 0 170.51 1,000 40.0 4 4 171.50 1,000 40.0 396 400 171.51 1,000 20.0 2 402 174.50 1,000 20.0 598 1,000 Device Routing Invert Outlet Devices #1 Primary 170.51'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.51 cfs @ 12.18 hrs HW=171.05' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.51 cfs @ 2.59 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 333HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 29P: Landscape Filter Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=5,639 sf Peak Elev=171.05' Storage=220 cf 0.59 cfs 0.51 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 334HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 30P: Porous Pavers Inflow Area = 443 sf, 33.86% Impervious, Inflow Depth = 6.22" for 100-YR event Inflow = 0.01 cfs @ 20.97 hrs, Volume= 230 cf Outflow = 0.01 cfs @ 21.00 hrs, Volume= 229 cf, Atten= 0%, Lag= 1.9 min Primary = 0.01 cfs @ 21.00 hrs, Volume= 229 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 174.97' @ 21.00 hrs Surf.Area= 150 sf Storage= 3 cf Plug-Flow detention time= 17.8 min calculated for 229 cf (100% of inflow) Center-of-Mass det. time= 14.1 min ( 1,429.8 - 1,415.7 ) Volume Invert Avail.Storage Storage Description #1 174.92' 135 cf 31" section beneath paver (Prismatic) Listed below (Recalc) 387 cf Overall - 2 cf Embedded = 385 cf x 35.0% Voids #2 174.93' 2 cf 4.0" Round Pipe Storage Inside #1 L= 28.0' 137 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.92 150 0 0 177.50 150 387 387 Device Routing Invert Outlet Devices #1 Primary 174.93'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 21.00 hrs HW=174.97' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.01 cfs @ 0.72 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 335HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond 30P: Porous Pavers Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Inflow Area=443 sf Peak Elev=174.97' Storage=3 cf 0.01 cfs0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 336HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 31P: Distribution Pipes [57] Hint: Peaked at 173.98' (Flood elevation advised) Inflow Area = 2,750 sf,100.00% Impervious, Inflow Depth = 7.65" for 100-YR event Inflow = 0.48 cfs @ 12.13 hrs, Volume= 1,753 cf Outflow = 0.48 cfs @ 12.13 hrs, Volume= 1,753 cf, Atten= 0%, Lag= 0.0 min Primary = 0.28 cfs @ 12.13 hrs, Volume= 1,653 cf Routed to Pond 29P : Landscape Filter Secondary = 0.20 cfs @ 12.13 hrs, Volume= 100 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 173.98' @ 12.13 hrs Device Routing Invert Outlet Devices #1 Secondary 173.70'6.0" Vert. Overflow C= 0.600 Limited to weir flow at low heads #2 Primary 173.37'4.0" Vert. Distribution Pipe C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.28 cfs @ 12.13 hrs HW=173.98' TW=171.02' (Dynamic Tailwater) 2=Distribution Pipe (Orifice Controls 0.28 cfs @ 3.19 fps) Secondary OutFlow Max=0.20 cfs @ 12.13 hrs HW=173.98' TW=0.00' (Dynamic Tailwater) 1=Overflow (Orifice Controls 0.20 cfs @ 1.79 fps) Pond 31P: Distribution Pipes Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.52 0.5 0.48 0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=2,750 sf Peak Elev=173.98' 0.48 cfs0.48 cfs 0.28 cfs 0.20 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 337HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond 33P: Distribution Pipes [57] Hint: Peaked at 174.08' (Flood elevation advised) Inflow Area = 2,889 sf,100.00% Impervious, Inflow Depth = 7.65" for 100-YR event Inflow = 0.50 cfs @ 12.13 hrs, Volume= 1,842 cf Outflow = 0.50 cfs @ 12.13 hrs, Volume= 1,842 cf, Atten= 0%, Lag= 0.0 min Primary = 0.31 cfs @ 12.13 hrs, Volume= 1,739 cf Routed to Pond 29P : Landscape Filter Secondary = 0.19 cfs @ 12.13 hrs, Volume= 103 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 174.08' @ 12.13 hrs Device Routing Invert Outlet Devices #1 Secondary 173.70'4.0" Vert. Overflow C= 0.600 Limited to weir flow at low heads #2 Primary 173.37'4.0" Vert. Distribution Pipe C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.31 cfs @ 12.13 hrs HW=174.08' TW=171.02' (Dynamic Tailwater) 2=Distribution Pipe (Orifice Controls 0.31 cfs @ 3.53 fps) Secondary OutFlow Max=0.19 cfs @ 12.13 hrs HW=174.08' TW=0.00' (Dynamic Tailwater) 1=Overflow (Orifice Controls 0.19 cfs @ 2.20 fps) Pond 33P: Distribution Pipes Inflow Outflow Primary Secondary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=2,889 sf Peak Elev=174.08' 0.50 cfs0.50 cfs 0.31 cfs 0.19 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 338HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond PN: Porous Pavers Inflow Area = 676 sf, 77.51% Impervious, Inflow Depth = 7.17" for 100-YR event Inflow = 0.01 cfs @ 20.23 hrs, Volume= 404 cf Outflow = 0.01 cfs @ 20.70 hrs, Volume= 402 cf, Atten= 0%, Lag= 28.5 min Primary = 0.01 cfs @ 20.70 hrs, Volume= 402 cf Routed to Pond 11 : Surface 11 Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 188.50' @ 20.70 hrs Surf.Area= 464 sf Storage= 13 cf Plug-Flow detention time= 42.4 min calculated for 402 cf (100% of inflow) Center-of-Mass det. time= 36.4 min ( 1,422.4 - 1,386.0 ) Volume Invert Avail.Storage Storage Description #1 188.42' 417 cf 31" section beneath pavers (Prismatic) Listed below (Recalc) 1,197 cf Overall - 6 cf Embedded = 1,191 cf x 35.0% Voids #2 188.43' 6 cf 4.0" Round Pipe Storage Inside #1 L= 67.0' 423 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 188.42 464 0 0 191.00 464 1,197 1,197 Device Routing Invert Outlet Devices #1 Primary 188.43'4.0" Round Culvert L= 7.0' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 188.43' / 186.00' S= 0.3471 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.09 sf Primary OutFlow Max=0.01 cfs @ 20.70 hrs HW=188.50' TW=185.30' (Dynamic Tailwater) 1=Culvert (Inlet Controls 0.01 cfs @ 0.70 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 339HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond PN: Porous Pavers Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.009 0.009 0.008 0.008 0.007 0.007 0.006 0.006 0.005 0.005 0.004 0.004 0.003 0.003 0.002 0.002 0.001 0.001 0.000 0 Inflow Area=676 sf Peak Elev=188.50' Storage=13 cf 4.0" Round Culvert n=0.013 L=7.0' S=0.3471 '/' 0.01 cfs0.01 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 340HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Pond PS: Porous Pavers Inflow Area = 2,379 sf, 11.60% Impervious, Inflow Depth = 5.76" for 100-YR event Inflow = 0.03 cfs @ 20.97 hrs, Volume= 1,141 cf Outflow = 0.03 cfs @ 21.02 hrs, Volume= 1,140 cf, Atten= 0%, Lag= 2.9 min Primary = 0.03 cfs @ 21.02 hrs, Volume= 1,140 cf Routed to Link 33L : On-site Closed Drainage Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs / 3 Peak Elev= 175.03' @ 21.02 hrs Surf.Area= 248 sf Storage= 10 cf Plug-Flow detention time= 11.0 min calculated for 1,140 cf (100% of inflow) Center-of-Mass det. time= 9.8 min ( 1,437.2 - 1,427.5 ) Volume Invert Avail.Storage Storage Description #1 174.92' 223 cf 31" section beneath paver (Prismatic) Listed below (Recalc) 640 cf Overall - 2 cf Embedded = 637 cf x 35.0% Voids #2 174.93' 2 cf 4.0" Round Pipe Storage Inside #1 L= 28.0' 226 cf Total Available Storage Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 174.92 248 0 0 177.50 248 640 640 Device Routing Invert Outlet Devices #1 Primary 174.93'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.03 cfs @ 21.02 hrs HW=175.03' TW=0.00' (Dynamic Tailwater) 1=Orifice/Grate (Orifice Controls 0.03 cfs @ 1.09 fps) NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 341HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Pond PS: Porous Pavers Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 Inflow Area=2,379 sf Peak Elev=175.03' Storage=10 cf 0.03 cfs0.03 cfs NOAA 24-hr D 100-YR Rainfall=7.89"15150_HydroCAD Printed 12/6/2023Prepared by Nitsch Engineering Page 342HydroCAD® 10.10-7c s/n 00546 © 2022 HydroCAD Software Solutions LLC Summary for Link 33L: On-site Closed Drainage Inflow Area = 27,635 sf, 35.49% Impervious, Inflow Depth = 6.27" for 100-YR event Inflow = 3.35 cfs @ 12.14 hrs, Volume= 14,448 cf Primary = 3.35 cfs @ 12.14 hrs, Volume= 14,448 cf, Atten= 0%, Lag= 0.0 min Routed to Reach DP-PR : Proposed Site Primary outflow = Inflow, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs Link 33L: On-site Closed Drainage Inflow Primary Hydrograph Time (hours) 10095908580757065605550454035302520151050Flow (cfs)3 2 1 0 Inflow Area=27,635 sf 3.35 cfs3.35 cfs