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HomeMy WebLinkAbout4977800 bgy HydroCAD Report1 PROJECT SITE 2 BUILDING 1P (6) STORMTECH SC-740 CHAMBERS Routing Diagram for 4977800-POST Prepared by BSC Group, Printed 12/12/2013 HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Subcat Reach Pond Link WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 2-year Rainfall=3.60"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 2HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=14,101 sf 27.42% Impervious Runoff Depth=0.38"Subcatchment 1: PROJECT SITE Tc=6.0 min CN=55 Runoff=0.07 cfs 0.010 af Runoff Area=1,900 sf 100.00% Impervious Runoff Depth=3.37"Subcatchment 2: BUILDING Tc=6.0 min CN=98 Runoff=0.15 cfs 0.012 af Peak Elev=75.21' Storage=49 cf Inflow=0.20 cfs 0.022 afPond 1P: (6) STORMTECH SC-740 CHAMBERS Outflow=0.12 cfs 0.022 af Total Runoff Area = 0.367 ac Runoff Volume = 0.022 af Average Runoff Depth = 0.73" 63.96% Pervious = 0.235 ac 36.04% Impervious = 0.132 ac WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 2-year Rainfall=3.60"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 3HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Summary for Subcatchment 1: PROJECT SITE Runoff = 0.07 cfs @ 12.15 hrs, Volume= 0.010 af, Depth= 0.38" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2-year Rainfall=3.60" Area (sf) CN Description 10,234 39 >75% Grass cover, Good, HSG A 3,867 98 Paved parking, HSG A 14,101 55 Weighted Average 10,234 72.58% Pervious Area 3,867 27.42% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1: PROJECT SITE Runoff Hydrograph Time (hours) 3029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 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 Type III 24-hr 2-year Rainfall=3.60" Runoff Area=14,101 sf Runoff Volume=0.010 af Runoff Depth=0.38" Tc=6.0 min CN=55 0.07 cfs WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 2-year Rainfall=3.60"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 4HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Summary for Subcatchment 2: BUILDING Runoff = 0.15 cfs @ 12.08 hrs, Volume= 0.012 af, Depth= 3.37" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2-year Rainfall=3.60" Area (sf) CN Description 1,900 98 Roofs, HSG A 1,900 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2: BUILDING Runoff Hydrograph Time (hours) 3029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 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 Type III 24-hr 2-year Rainfall=3.60" Runoff Area=1,900 sf Runoff Volume=0.012 af Runoff Depth=3.37" Tc=6.0 min CN=98 0.15 cfs WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 2-year Rainfall=3.60"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 5HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Summary for Pond 1P: (6) STORMTECH SC-740 CHAMBERS Inflow Area = 0.367 ac, 36.04% Impervious, Inflow Depth = 0.73" for 2-year event Inflow = 0.20 cfs @ 12.11 hrs, Volume= 0.022 af Outflow = 0.12 cfs @ 12.31 hrs, Volume= 0.022 af, Atten= 41%, Lag= 12.1 min Discarded = 0.12 cfs @ 12.31 hrs, Volume= 0.022 af Routing by Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Peak Elev= 75.21' @ 12.31 hrs Surf.Area= 599 sf Storage= 49 cf Plug-Flow detention time= 2.2 min calculated for 0.022 af (100% of inflow) Center-of-Mass det. time= 2.2 min ( 838.0 - 835.8 ) Volume Invert Avail.Storage Storage Description #1A 75.00' 560 cf 15.75'W x 38.04'L x 3.50'H Field A 2,097 cf Overall - 698 cf Embedded = 1,399 cf x 40.0% Voids #2A 75.50' 698 cf StormTech SC-740 x 15 Inside #1 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap Row Length Adjustment= +0.44' x 6.45 sf x 3 rows 1,257 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 75.00'8.270 in/hr Exfiltration over Horizontal area Conductivity to Groundwater Elevation = 70.10' Discarded OutFlow Max=0.12 cfs @ 12.31 hrs HW=75.21' (Free Discharge) 1=Exfiltration ( Controls 0.12 cfs) WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 2-year Rainfall=3.60"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 6HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Pond 1P: (6) STORMTECH SC-740 CHAMBERS - Chamber Wizard Field A Chamber Model = StormTech SC-740 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap Row Length Adjustment= +0.44' x 6.45 sf x 3 rows 51.0" Wide + 6.0" Spacing = 57.0" C-C Row Spacing 5 Chambers/Row x 7.12' Long +0.44' Row Adjustment = 36.04' Row Length +12.0" End Stone x 2 = 38.04' Base Length 3 Rows x 51.0" Wide + 6.0" Spacing x 2 + 12.0" Side Stone x 2 = 15.75' Base Width 6.0" Base + 30.0" Chamber Height + 6.0" Cover = 3.50' Field Height 15 Chambers x 45.9 cf +0.44' Row Adjustment x 6.45 sf x 3 Rows = 697.6 cf Chamber Storage 2,097.0 cf Field - 697.6 cf Chambers = 1,399.3 cf Stone x 40.0% Voids = 559.7 cf Stone Storage Chamber Storage + Stone Storage = 1,257.4 cf = 0.029 af Overall Storage Efficiency = 60.0% 15 Chambers 77.7 cy Field 51.8 cy Stone WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 2-year Rainfall=3.60"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 7HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Pond 1P: (6) STORMTECH SC-740 CHAMBERS Inflow Discarded Hydrograph Time (hours) 3029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 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=0.367 ac Peak Elev=75.21' Storage=49 cf 0.20 cfs 0.12 cfs WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 10-year Rainfall=4.80"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 8HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=14,101 sf 27.42% Impervious Runoff Depth=0.88"Subcatchment 1: PROJECT SITE Tc=6.0 min CN=55 Runoff=0.26 cfs 0.024 af Runoff Area=1,900 sf 100.00% Impervious Runoff Depth=4.56"Subcatchment 2: BUILDING Tc=6.0 min CN=98 Runoff=0.20 cfs 0.017 af Peak Elev=75.86' Storage=290 cf Inflow=0.46 cfs 0.040 afPond 1P: (6) STORMTECH SC-740 CHAMBERS Outflow=0.13 cfs 0.040 af Total Runoff Area = 0.367 ac Runoff Volume = 0.040 af Average Runoff Depth = 1.32" 63.96% Pervious = 0.235 ac 36.04% Impervious = 0.132 ac WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 10-year Rainfall=4.80"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 9HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Summary for Subcatchment 1: PROJECT SITE Runoff = 0.26 cfs @ 12.11 hrs, Volume= 0.024 af, Depth= 0.88" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 10-year Rainfall=4.80" Area (sf) CN Description 10,234 39 >75% Grass cover, Good, HSG A 3,867 98 Paved parking, HSG A 14,101 55 Weighted Average 10,234 72.58% Pervious Area 3,867 27.42% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1: PROJECT SITE Runoff Hydrograph Time (hours) 3029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 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 Type III 24-hr 10-year Rainfall=4.80" Runoff Area=14,101 sf Runoff Volume=0.024 af Runoff Depth=0.88" Tc=6.0 min CN=55 0.26 cfs WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 10-year Rainfall=4.80"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 10HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Summary for Subcatchment 2: BUILDING Runoff = 0.20 cfs @ 12.08 hrs, Volume= 0.017 af, Depth= 4.56" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 10-year Rainfall=4.80" Area (sf) CN Description 1,900 98 Roofs, HSG A 1,900 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2: BUILDING Runoff Hydrograph Time (hours) 3029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 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 Type III 24-hr 10-year Rainfall=4.80" Runoff Area=1,900 sf Runoff Volume=0.017 af Runoff Depth=4.56" Tc=6.0 min CN=98 0.20 cfs WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 10-year Rainfall=4.80"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 11HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Summary for Pond 1P: (6) STORMTECH SC-740 CHAMBERS Inflow Area = 0.367 ac, 36.04% Impervious, Inflow Depth = 1.32" for 10-year event Inflow = 0.46 cfs @ 12.10 hrs, Volume= 0.040 af Outflow = 0.13 cfs @ 12.51 hrs, Volume= 0.040 af, Atten= 71%, Lag= 24.5 min Discarded = 0.13 cfs @ 12.51 hrs, Volume= 0.040 af Routing by Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Peak Elev= 75.86' @ 12.51 hrs Surf.Area= 599 sf Storage= 290 cf Plug-Flow detention time= 10.9 min calculated for 0.040 af (100% of inflow) Center-of-Mass det. time= 10.9 min ( 846.8 - 835.9 ) Volume Invert Avail.Storage Storage Description #1A 75.00' 560 cf 15.75'W x 38.04'L x 3.50'H Field A 2,097 cf Overall - 698 cf Embedded = 1,399 cf x 40.0% Voids #2A 75.50' 698 cf StormTech SC-740 x 15 Inside #1 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap Row Length Adjustment= +0.44' x 6.45 sf x 3 rows 1,257 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 75.00'8.270 in/hr Exfiltration over Horizontal area Conductivity to Groundwater Elevation = 70.10' Discarded OutFlow Max=0.13 cfs @ 12.51 hrs HW=75.86' (Free Discharge) 1=Exfiltration ( Controls 0.13 cfs) WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 10-year Rainfall=4.80"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 12HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Pond 1P: (6) STORMTECH SC-740 CHAMBERS - Chamber Wizard Field A Chamber Model = StormTech SC-740 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap Row Length Adjustment= +0.44' x 6.45 sf x 3 rows 51.0" Wide + 6.0" Spacing = 57.0" C-C Row Spacing 5 Chambers/Row x 7.12' Long +0.44' Row Adjustment = 36.04' Row Length +12.0" End Stone x 2 = 38.04' Base Length 3 Rows x 51.0" Wide + 6.0" Spacing x 2 + 12.0" Side Stone x 2 = 15.75' Base Width 6.0" Base + 30.0" Chamber Height + 6.0" Cover = 3.50' Field Height 15 Chambers x 45.9 cf +0.44' Row Adjustment x 6.45 sf x 3 Rows = 697.6 cf Chamber Storage 2,097.0 cf Field - 697.6 cf Chambers = 1,399.3 cf Stone x 40.0% Voids = 559.7 cf Stone Storage Chamber Storage + Stone Storage = 1,257.4 cf = 0.029 af Overall Storage Efficiency = 60.0% 15 Chambers 77.7 cy Field 51.8 cy Stone WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 10-year Rainfall=4.80"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 13HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Pond 1P: (6) STORMTECH SC-740 CHAMBERS Inflow Discarded Hydrograph Time (hours) 3029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 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=0.367 ac Peak Elev=75.86' Storage=290 cf 0.46 cfs 0.13 cfs WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 25-year Rainfall=5.70"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 14HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=14,101 sf 27.42% Impervious Runoff Depth=1.35"Subcatchment 1: PROJECT SITE Tc=6.0 min CN=55 Runoff=0.44 cfs 0.036 af Runoff Area=1,900 sf 100.00% Impervious Runoff Depth=5.46"Subcatchment 2: BUILDING Tc=6.0 min CN=98 Runoff=0.24 cfs 0.020 af Peak Elev=76.43' Storage=555 cf Inflow=0.68 cfs 0.056 afPond 1P: (6) STORMTECH SC-740 CHAMBERS Outflow=0.15 cfs 0.056 af Total Runoff Area = 0.367 ac Runoff Volume = 0.056 af Average Runoff Depth = 1.84" 63.96% Pervious = 0.235 ac 36.04% Impervious = 0.132 ac WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 25-year Rainfall=5.70"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 15HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Summary for Subcatchment 1: PROJECT SITE Runoff = 0.44 cfs @ 12.10 hrs, Volume= 0.036 af, Depth= 1.35" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 25-year Rainfall=5.70" Area (sf) CN Description 10,234 39 >75% Grass cover, Good, HSG A 3,867 98 Paved parking, HSG A 14,101 55 Weighted Average 10,234 72.58% Pervious Area 3,867 27.42% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1: PROJECT SITE Runoff Hydrograph Time (hours) 3029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 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 Type III 24-hr 25-year Rainfall=5.70" Runoff Area=14,101 sf Runoff Volume=0.036 af Runoff Depth=1.35" Tc=6.0 min CN=55 0.44 cfs WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 25-year Rainfall=5.70"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 16HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Summary for Subcatchment 2: BUILDING Runoff = 0.24 cfs @ 12.08 hrs, Volume= 0.020 af, Depth= 5.46" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 25-year Rainfall=5.70" Area (sf) CN Description 1,900 98 Roofs, HSG A 1,900 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2: BUILDING Runoff Hydrograph Time (hours) 3029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 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 Type III 24-hr 25-year Rainfall=5.70" Runoff Area=1,900 sf Runoff Volume=0.020 af Runoff Depth=5.46" Tc=6.0 min CN=98 0.24 cfs WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 25-year Rainfall=5.70"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 17HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Summary for Pond 1P: (6) STORMTECH SC-740 CHAMBERS Inflow Area = 0.367 ac, 36.04% Impervious, Inflow Depth = 1.84" for 25-year event Inflow = 0.68 cfs @ 12.10 hrs, Volume= 0.056 af Outflow = 0.15 cfs @ 12.56 hrs, Volume= 0.056 af, Atten= 78%, Lag= 27.9 min Discarded = 0.15 cfs @ 12.56 hrs, Volume= 0.056 af Routing by Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Peak Elev= 76.43' @ 12.56 hrs Surf.Area= 599 sf Storage= 555 cf Plug-Flow detention time= 23.2 min calculated for 0.056 af (100% of inflow) Center-of-Mass det. time= 23.2 min ( 856.6 - 833.4 ) Volume Invert Avail.Storage Storage Description #1A 75.00' 560 cf 15.75'W x 38.04'L x 3.50'H Field A 2,097 cf Overall - 698 cf Embedded = 1,399 cf x 40.0% Voids #2A 75.50' 698 cf StormTech SC-740 x 15 Inside #1 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap Row Length Adjustment= +0.44' x 6.45 sf x 3 rows 1,257 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 75.00'8.270 in/hr Exfiltration over Horizontal area Conductivity to Groundwater Elevation = 70.10' Discarded OutFlow Max=0.15 cfs @ 12.56 hrs HW=76.43' (Free Discharge) 1=Exfiltration ( Controls 0.15 cfs) WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 25-year Rainfall=5.70"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 18HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Pond 1P: (6) STORMTECH SC-740 CHAMBERS - Chamber Wizard Field A Chamber Model = StormTech SC-740 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap Row Length Adjustment= +0.44' x 6.45 sf x 3 rows 51.0" Wide + 6.0" Spacing = 57.0" C-C Row Spacing 5 Chambers/Row x 7.12' Long +0.44' Row Adjustment = 36.04' Row Length +12.0" End Stone x 2 = 38.04' Base Length 3 Rows x 51.0" Wide + 6.0" Spacing x 2 + 12.0" Side Stone x 2 = 15.75' Base Width 6.0" Base + 30.0" Chamber Height + 6.0" Cover = 3.50' Field Height 15 Chambers x 45.9 cf +0.44' Row Adjustment x 6.45 sf x 3 Rows = 697.6 cf Chamber Storage 2,097.0 cf Field - 697.6 cf Chambers = 1,399.3 cf Stone x 40.0% Voids = 559.7 cf Stone Storage Chamber Storage + Stone Storage = 1,257.4 cf = 0.029 af Overall Storage Efficiency = 60.0% 15 Chambers 77.7 cy Field 51.8 cy Stone WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 25-year Rainfall=5.70"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 19HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Pond 1P: (6) STORMTECH SC-740 CHAMBERS Inflow Discarded Hydrograph Time (hours) 3029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 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=0.367 ac Peak Elev=76.43' Storage=555 cf 0.68 cfs 0.15 cfs WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 100-year Rainfall=7.10"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 20HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=14,101 sf 27.42% Impervious Runoff Depth=2.19"Subcatchment 1: PROJECT SITE Tc=6.0 min CN=55 Runoff=0.78 cfs 0.059 af Runoff Area=1,900 sf 100.00% Impervious Runoff Depth=6.86"Subcatchment 2: BUILDING Tc=6.0 min CN=98 Runoff=0.30 cfs 0.025 af Peak Elev=77.69' Storage=1,056 cf Inflow=1.08 cfs 0.084 afPond 1P: (6) STORMTECH SC-740 Outflow=0.18 cfs 0.084 af Total Runoff Area = 0.367 ac Runoff Volume = 0.084 af Average Runoff Depth = 2.74" 63.96% Pervious = 0.235 ac 36.04% Impervious = 0.132 ac WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 100-year Rainfall=7.10"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 21HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Summary for Subcatchment 1: PROJECT SITE Runoff = 0.78 cfs @ 12.10 hrs, Volume= 0.059 af, Depth= 2.19" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 100-year Rainfall=7.10" Area (sf) CN Description 10,234 39 >75% Grass cover, Good, HSG A 3,867 98 Paved parking, HSG A 14,101 55 Weighted Average 10,234 72.58% Pervious Area 3,867 27.42% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1: PROJECT SITE Runoff Hydrograph Time (hours) 3029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 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 Type III 24-hr 100-year Rainfall=7.10" Runoff Area=14,101 sf Runoff Volume=0.059 af Runoff Depth=2.19" Tc=6.0 min CN=55 0.78 cfs WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 100-year Rainfall=7.10"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 22HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Summary for Subcatchment 2: BUILDING Runoff = 0.30 cfs @ 12.08 hrs, Volume= 0.025 af, Depth= 6.86" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 100-year Rainfall=7.10" Area (sf) CN Description 1,900 98 Roofs, HSG A 1,900 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2: BUILDING Runoff Hydrograph Time (hours) 3029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 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 Type III 24-hr 100-year Rainfall=7.10" Runoff Area=1,900 sf Runoff Volume=0.025 af Runoff Depth=6.86" Tc=6.0 min CN=98 0.30 cfs WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 100-year Rainfall=7.10"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 23HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Summary for Pond 1P: (6) STORMTECH SC-740 CHAMBERS Inflow Area = 0.367 ac, 36.04% Impervious, Inflow Depth = 2.74" for 100-year event Inflow = 1.08 cfs @ 12.09 hrs, Volume= 0.084 af Outflow = 0.18 cfs @ 12.63 hrs, Volume= 0.084 af, Atten= 84%, Lag= 32.1 min Discarded = 0.18 cfs @ 12.63 hrs, Volume= 0.084 af Routing by Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Peak Elev= 77.69' @ 12.63 hrs Surf.Area= 599 sf Storage= 1,056 cf Plug-Flow detention time= 46.8 min calculated for 0.084 af (100% of inflow) Center-of-Mass det. time= 46.7 min ( 875.6 - 828.8 ) Volume Invert Avail.Storage Storage Description #1A 75.00' 560 cf 15.75'W x 38.04'L x 3.50'H Field A 2,097 cf Overall - 698 cf Embedded = 1,399 cf x 40.0% Voids #2A 75.50' 698 cf StormTech SC-740 x 15 Inside #1 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap Row Length Adjustment= +0.44' x 6.45 sf x 3 rows 1,257 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Discarded 75.00'8.270 in/hr Exfiltration over Horizontal area Conductivity to Groundwater Elevation = 70.10' Discarded OutFlow Max=0.18 cfs @ 12.63 hrs HW=77.69' (Free Discharge) 1=Exfiltration ( Controls 0.18 cfs) WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 100-year Rainfall=7.10"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 24HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Pond 1P: (6) STORMTECH SC-740 CHAMBERS - Chamber Wizard Field A Chamber Model = StormTech SC-740 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap Row Length Adjustment= +0.44' x 6.45 sf x 3 rows 51.0" Wide + 6.0" Spacing = 57.0" C-C Row Spacing 5 Chambers/Row x 7.12' Long +0.44' Row Adjustment = 36.04' Row Length +12.0" End Stone x 2 = 38.04' Base Length 3 Rows x 51.0" Wide + 6.0" Spacing x 2 + 12.0" Side Stone x 2 = 15.75' Base Width 6.0" Base + 30.0" Chamber Height + 6.0" Cover = 3.50' Field Height 15 Chambers x 45.9 cf +0.44' Row Adjustment x 6.45 sf x 3 Rows = 697.6 cf Chamber Storage 2,097.0 cf Field - 697.6 cf Chambers = 1,399.3 cf Stone x 40.0% Voids = 559.7 cf Stone Storage Chamber Storage + Stone Storage = 1,257.4 cf = 0.029 af Overall Storage Efficiency = 60.0% 15 Chambers 77.7 cy Field 51.8 cy Stone WHITTEN LANDSCAPING, 20 COMMERCIAL STREET Type III 24-hr 100-year Rainfall=7.10"4977800-POST Printed 12/12/2013Prepared by BSC Group Page 25HydroCAD® 10.00 s/n 00906 © 2013 HydroCAD Software Solutions LLC Pond 1P: (6) STORMTECH SC-740 CHAMBERS Inflow Discarded Hydrograph Time (hours) 3029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 1 0 Inflow Area=0.367 ac Peak Elev=77.69' Storage=1,056 cf 1.08 cfs 0.18 cfs