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6.1 Proposed Conditions1 Proposed 1A 2 PROPOSED 3S Proposed 1B 2P POND A WP WETLAND P 10L Irrigation System Routing Diagram for ARBORGLEN 05112017 Prepared by Sathre-Bergquist, Inc., Printed 5/16/2017 HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Subcat Reach Pond Link Proposed Condition ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 2HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Area Listing (selected nodes) Area (acres) CN Description (subcatchment-numbers) 4.790 83 1/4 acre lots, 38% imp, HSG C (1, 3S) 1.000 65 Brush, Good, HSG C (2) 0.050 98 Water Surface, HSG C (2) 5.840 80 TOTAL AREA Proposed Condition ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 3HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Soil Listing (selected nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 HSG A 0.000 HSG B 5.840 HSG C 1, 2, 3S 0.000 HSG D 0.000 Other 5.840 TOTAL AREA Proposed Condition ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 4HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Ground Covers (selected nodes) HSG-A (acres) HSG-B (acres) HSG-C (acres) HSG-D (acres) Other (acres) Total (acres) Ground Cover Subcatchment Numbers 0.000 0.000 4.790 0.000 0.000 4.790 1/4 acre lots, 38% imp 1, 3S 0.000 0.000 1.000 0.000 0.000 1.000 Brush, Good 2 0.000 0.000 0.050 0.000 0.000 0.050 Water Surface 2 0.000 0.000 5.840 0.000 0.000 5.840 TOTAL AREA Proposed Condition ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 5HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Pipe Listing (selected nodes) Line# Node Number In-Invert (feet) Out-Invert (feet) Length (feet) Slope (ft/ft) n Diam/Width (inches) Height (inches) Inside-Fill (inches) 1 1 0.00 0.00 660.0 0.0300 0.013 15.0 0.0 0.0 2 3S 0.00 0.00 660.0 0.0300 0.013 18.0 0.0 0.0 3 2P 898.00 888.00 80.0 0.1250 0.012 18.0 0.0 0.0 Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 6HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Time span=0.00-200.00 hrs, dt=0.01 hrs, 20001 points Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Sim-Route method - Pond routing by Sim-Route method Runoff Area=1.680 ac 38.00% Impervious Runoff Depth=1.52"Subcatchment 1: Proposed 1A Flow Length=810' Tc=15.5 min CN=74/98 Runoff=2.76 cfs 0.212 af Runoff Area=1.050 ac 4.76% Impervious Runoff Depth=0.55"Subcatchment 2: PROPOSED Flow Length=300' Slope=0.1000 '/' Tc=13.1 min CN=65/98 Runoff=0.54 cfs 0.048 af Runoff Area=3.110 ac 38.00% Impervious Runoff Depth=1.52"Subcatchment 3S: Proposed 1B Flow Length=916' Tc=16.3 min CN=74/98 Runoff=4.97 cfs 0.393 af Peak Elev=900.46' Storage=13,718 cf Inflow=7.72 cfs 0.605 afPond 2P: POND A Primary=2.76 cfs 0.339 af Secondary=0.00 cfs 0.000 af Outflow=2.76 cfs 0.339 af Inflow=2.99 cfs 0.387 afPond WP: WETLAND P Primary=2.99 cfs 0.387 af Inflow=0.00 cfs 0.000 afLink 10L: Irrigation System Primary=0.00 cfs 0.000 af Total Runoff Area = 5.840 ac Runoff Volume = 0.653 af Average Runoff Depth = 1.34" 67.98% Pervious = 3.970 ac 32.02% Impervious = 1.870 ac Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 7HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 1: Proposed 1A Runoff = 2.76 cfs @ 12.21 hrs, Volume= 0.212 af, Depth= 1.52" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-200.00 hrs, dt= 0.01 hrs MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87" Area (ac) CN Description 1.680 83 1/4 acre lots, 38% imp, HSG C 0.000 87 1/4 acre lots, 38% imp, HSG D 1.680 83 Weighted Average 1.042 74 62.00% Pervious Area 0.638 98 38.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.3 150 0.0200 0.17 Sheet Flow, Grass: Short n= 0.150 P2= 2.87" 1.2 660 0.0300 9.12 11.19 Pipe Channel, 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.013 Concrete pipe, bends & connections 15.5 810 Total Subcatchment 1: Proposed 1A Runoff Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)3 2 1 0 MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87" Runoff Area=1.680 ac Runoff Volume=0.212 af Runoff Depth=1.52" Flow Length=810' Tc=15.5 min CN=74/98 2.76 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 8HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 2: PROPOSED Runoff = 0.54 cfs @ 12.21 hrs, Volume= 0.048 af, Depth= 0.55" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-200.00 hrs, dt= 0.01 hrs MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87" Area (ac) CN Description 1.000 65 Brush, Good, HSG C 0.050 98 Water Surface, HSG C 1.050 67 Weighted Average 1.000 65 95.24% Pervious Area 0.050 98 4.76% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.1 300 0.1000 0.38 Sheet Flow, Rear Yard Grass: Short n= 0.150 P2= 2.87" Subcatchment 2: PROPOSED Runoff Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (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 MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87" Runoff Area=1.050 ac Runoff Volume=0.048 af Runoff Depth=0.55" Flow Length=300' Slope=0.1000 '/' Tc=13.1 min CN=65/98 0.54 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 9HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Proposed 1B Runoff = 4.97 cfs @ 12.22 hrs, Volume= 0.393 af, Depth= 1.52" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-200.00 hrs, dt= 0.01 hrs MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87" Area (ac) CN Description 3.110 83 1/4 acre lots, 38% imp, HSG C 0.000 87 1/4 acre lots, 38% imp, HSG D 3.110 83 Weighted Average 1.928 74 62.00% Pervious Area 1.182 98 38.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.2 256 0.0500 0.28 Sheet Flow, Grass: Short n= 0.150 P2= 2.87" 1.1 660 0.0300 10.30 18.19 Pipe Channel, RCP_Round 18" 18.0" Round Area= 1.8 sf Perim= 4.7' r= 0.38' n= 0.013 Concrete pipe, bends & connections 16.3 916 Total Subcatchment 3S: Proposed 1B Runoff Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)5 4 3 2 1 0 MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87" Runoff Area=3.110 ac Runoff Volume=0.393 af Runoff Depth=1.52" Flow Length=916' Tc=16.3 min CN=74/98 4.97 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 10HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Pond 2P: POND A Inflow Area = 4.790 ac, 38.00% Impervious, Inflow Depth = 1.52" for 2y 24hr event Inflow = 7.72 cfs @ 12.22 hrs, Volume= 0.605 af Outflow = 2.76 cfs @ 12.57 hrs, Volume= 0.339 af, Atten= 64%, Lag= 21.0 min Primary = 2.76 cfs @ 12.57 hrs, Volume= 0.339 af Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Sim-Route method, Time Span= 0.00-200.00 hrs, dt= 0.01 hrs Peak Elev= 900.46' @ 12.57 hrs Surf.Area= 0 sf Storage= 13,718 cf Plug-Flow detention time= 216.4 min calculated for 0.339 af (56% of inflow) Center-of-Mass det. time= 113.3 min ( 910.7 - 797.4 ) Volume Invert Avail.Storage Storage Description #1 895.99' 25,003 cf Custom Stage Data Listed below Elevation Cum.Store (feet) (cubic-feet) 895.99 0 896.00 4,000 898.00 8,500 900.00 12,600 902.00 17,500 904.00 22,800 910.00 25,003 Device Routing Invert Outlet Devices #1 Device 2 899.50'Custom Weir/Orifice, Cv= 2.62 (C= 3.28) Head (feet) 0.00 2.30 2.30 6.00 Width (feet) 0.90 0.90 4.00 4.00 #2 Primary 898.00'18.0" Round RCP_Round 18" L= 80.0' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 898.00' / 888.00' S= 0.1250 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.77 sf #3 Secondary 904.00'Land EOF, Cv= 2.62 (C= 3.28) Head (feet) 0.00 3.00 Width (feet) 5.00 5.00 Primary OutFlow Max=2.76 cfs @ 12.57 hrs HW=900.46' TW=0.00' (Dynamic Tailwater) 2=RCP_Round 18" (Passes 2.76 cfs of 15.16 cfs potential flow) 1=Custom Weir/Orifice (Weir Controls 2.76 cfs @ 3.20 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=895.99' TW=0.00' (Dynamic Tailwater) 3=Land EOF ( Controls 0.00 cfs) Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 11HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Pond 2P: POND A Inflow Outflow Primary Secondary Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)8 7 6 5 4 3 2 1 0 Inflow Area=4.790 ac Peak Elev=900.46' Storage=13,718 cf 7.72 cfs 2.76 cfs 2.76 cfs 0.00 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 12HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Pond WP: WETLAND P [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.840 ac, 32.02% Impervious, Inflow Depth = 0.80" for 2y 24hr event Inflow = 2.99 cfs @ 12.56 hrs, Volume= 0.387 af Primary = 2.99 cfs @ 12.57 hrs, Volume= 0.387 af, Atten= 0%, Lag= 0.6 min Routing by Sim-Route method, Time Span= 0.00-200.00 hrs, dt= 0.01 hrs Pond WP: WETLAND P Inflow Primary Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)3 2 1 0 Inflow Area=5.840 ac 2.99 cfs 2.99 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr2y_S1 2y 24hr Rainfall=2.87"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 13HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Link 10L: Irrigation System Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-200.00 hrs, dt= 0.01 hrs Link 10L: Irrigation System Inflow Primary Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)1 0 0.00 cfs 0.00 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 14HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Time span=0.00-200.00 hrs, dt=0.01 hrs, 20001 points Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Sim-Route method - Pond routing by Sim-Route method Runoff Area=1.680 ac 38.00% Impervious Runoff Depth=2.65"Subcatchment 1: Proposed 1A Flow Length=810' Tc=15.5 min CN=74/98 Runoff=5.06 cfs 0.371 af Runoff Area=1.050 ac 4.76% Impervious Runoff Depth=1.32"Subcatchment 2: PROPOSED Flow Length=300' Slope=0.1000 '/' Tc=13.1 min CN=65/98 Runoff=1.65 cfs 0.116 af Runoff Area=3.110 ac 38.00% Impervious Runoff Depth=2.65"Subcatchment 3S: Proposed 1B Flow Length=916' Tc=16.3 min CN=74/98 Runoff=9.11 cfs 0.686 af Peak Elev=901.83' Storage=17,081 cf Inflow=14.15 cfs 1.057 afPond 2P: POND A Primary=10.53 cfs 0.791 af Secondary=0.00 cfs 0.000 af Outflow=10.53 cfs 0.791 af Inflow=11.65 cfs 0.907 afPond WP: WETLAND P Primary=11.65 cfs 0.907 af Inflow=0.00 cfs 0.000 afLink 10L: Irrigation System Primary=0.00 cfs 0.000 af Total Runoff Area = 5.840 ac Runoff Volume = 1.173 af Average Runoff Depth = 2.41" 67.98% Pervious = 3.970 ac 32.02% Impervious = 1.870 ac Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 15HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 1: Proposed 1A Runoff = 5.06 cfs @ 12.21 hrs, Volume= 0.371 af, Depth= 2.65" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-200.00 hrs, dt= 0.01 hrs MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27" Area (ac) CN Description 1.680 83 1/4 acre lots, 38% imp, HSG C 0.000 87 1/4 acre lots, 38% imp, HSG D 1.680 83 Weighted Average 1.042 74 62.00% Pervious Area 0.638 98 38.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.3 150 0.0200 0.17 Sheet Flow, Grass: Short n= 0.150 P2= 2.87" 1.2 660 0.0300 9.12 11.19 Pipe Channel, 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.013 Concrete pipe, bends & connections 15.5 810 Total Subcatchment 1: Proposed 1A Runoff Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)5 4 3 2 1 0 MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27" Runoff Area=1.680 ac Runoff Volume=0.371 af Runoff Depth=2.65" Flow Length=810' Tc=15.5 min CN=74/98 5.06 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 16HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 2: PROPOSED Runoff = 1.65 cfs @ 12.19 hrs, Volume= 0.116 af, Depth= 1.32" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-200.00 hrs, dt= 0.01 hrs MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27" Area (ac) CN Description 1.000 65 Brush, Good, HSG C 0.050 98 Water Surface, HSG C 1.050 67 Weighted Average 1.000 65 95.24% Pervious Area 0.050 98 4.76% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.1 300 0.1000 0.38 Sheet Flow, Rear Yard Grass: Short n= 0.150 P2= 2.87" Subcatchment 2: PROPOSED Runoff Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)1 0 MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27" Runoff Area=1.050 ac Runoff Volume=0.116 af Runoff Depth=1.32" Flow Length=300' Slope=0.1000 '/' Tc=13.1 min CN=65/98 1.65 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 17HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Proposed 1B Runoff = 9.11 cfs @ 12.22 hrs, Volume= 0.686 af, Depth= 2.65" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-200.00 hrs, dt= 0.01 hrs MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27" Area (ac) CN Description 3.110 83 1/4 acre lots, 38% imp, HSG C 0.000 87 1/4 acre lots, 38% imp, HSG D 3.110 83 Weighted Average 1.928 74 62.00% Pervious Area 1.182 98 38.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.2 256 0.0500 0.28 Sheet Flow, Grass: Short n= 0.150 P2= 2.87" 1.1 660 0.0300 10.30 18.19 Pipe Channel, RCP_Round 18" 18.0" Round Area= 1.8 sf Perim= 4.7' r= 0.38' n= 0.013 Concrete pipe, bends & connections 16.3 916 Total Subcatchment 3S: Proposed 1B Runoff Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)10 9 8 7 6 5 4 3 2 1 0 MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27" Runoff Area=3.110 ac Runoff Volume=0.686 af Runoff Depth=2.65" Flow Length=916' Tc=16.3 min CN=74/98 9.11 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 18HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Pond 2P: POND A Inflow Area = 4.790 ac, 38.00% Impervious, Inflow Depth = 2.65" for 10y 24hr event Inflow = 14.15 cfs @ 12.22 hrs, Volume= 1.057 af Outflow = 10.53 cfs @ 12.35 hrs, Volume= 0.791 af, Atten= 26%, Lag= 7.9 min Primary = 10.53 cfs @ 12.35 hrs, Volume= 0.791 af Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Sim-Route method, Time Span= 0.00-200.00 hrs, dt= 0.01 hrs Peak Elev= 901.83' @ 12.35 hrs Surf.Area= 0 sf Storage= 17,081 cf Plug-Flow detention time= 120.9 min calculated for 0.791 af (75% of inflow) Center-of-Mass det. time= 56.7 min ( 838.6 - 782.0 ) Volume Invert Avail.Storage Storage Description #1 895.99' 25,003 cf Custom Stage Data Listed below Elevation Cum.Store (feet) (cubic-feet) 895.99 0 896.00 4,000 898.00 8,500 900.00 12,600 902.00 17,500 904.00 22,800 910.00 25,003 Device Routing Invert Outlet Devices #1 Device 2 899.50'Custom Weir/Orifice, Cv= 2.62 (C= 3.28) Head (feet) 0.00 2.30 2.30 6.00 Width (feet) 0.90 0.90 4.00 4.00 #2 Primary 898.00'18.0" Round RCP_Round 18" L= 80.0' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 898.00' / 888.00' S= 0.1250 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.77 sf #3 Secondary 904.00'Land EOF, Cv= 2.62 (C= 3.28) Head (feet) 0.00 3.00 Width (feet) 5.00 5.00 Primary OutFlow Max=10.52 cfs @ 12.35 hrs HW=901.83' TW=0.00' (Dynamic Tailwater) 2=RCP_Round 18" (Passes 10.52 cfs of 20.36 cfs potential flow) 1=Custom Weir/Orifice (Weir Controls 10.52 cfs @ 4.82 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=895.99' TW=0.00' (Dynamic Tailwater) 3=Land EOF ( Controls 0.00 cfs) Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 19HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Pond 2P: POND A Inflow Outflow Primary Secondary Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=4.790 ac Peak Elev=901.83' Storage=17,081 cf 14.15 cfs 10.53 cfs 10.53 cfs 0.00 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 20HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Pond WP: WETLAND P [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.840 ac, 32.02% Impervious, Inflow Depth = 1.86" for 10y 24hr event Inflow = 11.65 cfs @ 12.34 hrs, Volume= 0.907 af Primary = 11.65 cfs @ 12.35 hrs, Volume= 0.907 af, Atten= 0%, Lag= 0.6 min Routing by Sim-Route method, Time Span= 0.00-200.00 hrs, dt= 0.01 hrs Pond WP: WETLAND P Inflow Primary Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=5.840 ac 11.65 cfs 11.65 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr10y_S1 10y 24hr Rainfall=4.27"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 21HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Link 10L: Irrigation System Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-200.00 hrs, dt= 0.01 hrs Link 10L: Irrigation System Inflow Primary Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)1 0 0.00 cfs 0.00 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 22HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Time span=0.00-200.00 hrs, dt=0.01 hrs, 20001 points Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Sim-Route method - Pond routing by Sim-Route method Runoff Area=1.680 ac 38.00% Impervious Runoff Depth=5.45"Subcatchment 1: Proposed 1A Flow Length=810' Tc=15.5 min CN=74/98 Runoff=9.82 cfs 0.764 af Runoff Area=1.050 ac 4.76% Impervious Runoff Depth=3.60"Subcatchment 2: PROPOSED Flow Length=300' Slope=0.1000 '/' Tc=13.1 min CN=65/98 Runoff=4.57 cfs 0.315 af Runoff Area=3.110 ac 38.00% Impervious Runoff Depth=5.45"Subcatchment 3S: Proposed 1B Flow Length=916' Tc=16.3 min CN=74/98 Runoff=17.72 cfs 1.413 af Peak Elev=903.05' Storage=20,295 cf Inflow=27.51 cfs 2.177 afPond 2P: POND A Primary=24.07 cfs 1.911 af Secondary=0.00 cfs 0.000 af Outflow=24.07 cfs 1.911 af Inflow=27.76 cfs 2.226 afPond WP: WETLAND P Primary=27.76 cfs 2.226 af Inflow=0.00 cfs 0.000 afLink 10L: Irrigation System Primary=0.00 cfs 0.000 af Total Runoff Area = 5.840 ac Runoff Volume = 2.492 af Average Runoff Depth = 5.12" 67.98% Pervious = 3.970 ac 32.02% Impervious = 1.870 ac Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 23HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 1: Proposed 1A Runoff = 9.82 cfs @ 12.21 hrs, Volume= 0.764 af, Depth= 5.45" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-200.00 hrs, dt= 0.01 hrs MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41" Area (ac) CN Description 1.680 83 1/4 acre lots, 38% imp, HSG C 0.000 87 1/4 acre lots, 38% imp, HSG D 1.680 83 Weighted Average 1.042 74 62.00% Pervious Area 0.638 98 38.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.3 150 0.0200 0.17 Sheet Flow, Grass: Short n= 0.150 P2= 2.87" 1.2 660 0.0300 9.12 11.19 Pipe Channel, 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.013 Concrete pipe, bends & connections 15.5 810 Total Subcatchment 1: Proposed 1A Runoff Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)11 10 9 8 7 6 5 4 3 2 1 0 MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41" Runoff Area=1.680 ac Runoff Volume=0.764 af Runoff Depth=5.45" Flow Length=810' Tc=15.5 min CN=74/98 9.82 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 24HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 2: PROPOSED Runoff = 4.57 cfs @ 12.18 hrs, Volume= 0.315 af, Depth= 3.60" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-200.00 hrs, dt= 0.01 hrs MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41" Area (ac) CN Description 1.000 65 Brush, Good, HSG C 0.050 98 Water Surface, HSG C 1.050 67 Weighted Average 1.000 65 95.24% Pervious Area 0.050 98 4.76% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.1 300 0.1000 0.38 Sheet Flow, Rear Yard Grass: Short n= 0.150 P2= 2.87" Subcatchment 2: PROPOSED Runoff Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)5 4 3 2 1 0 MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41" Runoff Area=1.050 ac Runoff Volume=0.315 af Runoff Depth=3.60" Flow Length=300' Slope=0.1000 '/' Tc=13.1 min CN=65/98 4.57 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 25HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Proposed 1B Runoff = 17.72 cfs @ 12.22 hrs, Volume= 1.413 af, Depth= 5.45" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-200.00 hrs, dt= 0.01 hrs MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41" Area (ac) CN Description 3.110 83 1/4 acre lots, 38% imp, HSG C 0.000 87 1/4 acre lots, 38% imp, HSG D 3.110 83 Weighted Average 1.928 74 62.00% Pervious Area 1.182 98 38.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.2 256 0.0500 0.28 Sheet Flow, Grass: Short n= 0.150 P2= 2.87" 1.1 660 0.0300 10.30 18.19 Pipe Channel, RCP_Round 18" 18.0" Round Area= 1.8 sf Perim= 4.7' r= 0.38' n= 0.013 Concrete pipe, bends & connections 16.3 916 Total Subcatchment 3S: Proposed 1B Runoff Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41" Runoff Area=3.110 ac Runoff Volume=1.413 af Runoff Depth=5.45" Flow Length=916' Tc=16.3 min CN=74/98 17.72 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 26HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Pond 2P: POND A Inflow Area = 4.790 ac, 38.00% Impervious, Inflow Depth = 5.45" for 100y 24hr event Inflow = 27.51 cfs @ 12.21 hrs, Volume= 2.177 af Outflow = 24.07 cfs @ 12.29 hrs, Volume= 1.911 af, Atten= 12%, Lag= 4.9 min Primary = 24.07 cfs @ 12.29 hrs, Volume= 1.911 af Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Sim-Route method, Time Span= 0.00-200.00 hrs, dt= 0.01 hrs Peak Elev= 903.05' @ 12.29 hrs Surf.Area= 0 sf Storage= 20,295 cf Plug-Flow detention time= 68.8 min calculated for 1.911 af (88% of inflow) Center-of-Mass det. time= 32.4 min ( 801.3 - 768.9 ) Volume Invert Avail.Storage Storage Description #1 895.99' 25,003 cf Custom Stage Data Listed below Elevation Cum.Store (feet) (cubic-feet) 895.99 0 896.00 4,000 898.00 8,500 900.00 12,600 902.00 17,500 904.00 22,800 910.00 25,003 Device Routing Invert Outlet Devices #1 Device 2 899.50'Custom Weir/Orifice, Cv= 2.62 (C= 3.28) Head (feet) 0.00 2.30 2.30 6.00 Width (feet) 0.90 0.90 4.00 4.00 #2 Primary 898.00'18.0" Round RCP_Round 18" L= 80.0' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 898.00' / 888.00' S= 0.1250 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.77 sf #3 Secondary 904.00'Land EOF, Cv= 2.62 (C= 3.28) Head (feet) 0.00 3.00 Width (feet) 5.00 5.00 Primary OutFlow Max=24.07 cfs @ 12.29 hrs HW=903.05' TW=0.00' (Dynamic Tailwater) 2=RCP_Round 18" (Inlet Controls 24.07 cfs @ 13.62 fps) 1=Custom Weir/Orifice (Passes 24.07 cfs of 34.00 cfs potential flow) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=895.99' TW=0.00' (Dynamic Tailwater) 3=Land EOF ( Controls 0.00 cfs) Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 27HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Pond 2P: POND A Inflow Outflow Primary Secondary Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Inflow Area=4.790 ac Peak Elev=903.05' Storage=20,295 cf 27.51 cfs 24.07 cfs 24.07 cfs 0.00 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 28HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Pond WP: WETLAND P [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.840 ac, 32.02% Impervious, Inflow Depth = 4.57" for 100y 24hr event Inflow = 27.76 cfs @ 12.24 hrs, Volume= 2.226 af Primary = 27.76 cfs @ 12.25 hrs, Volume= 2.226 af, Atten= 0%, Lag= 0.6 min Routing by Sim-Route method, Time Span= 0.00-200.00 hrs, dt= 0.01 hrs Pond WP: WETLAND P Inflow Primary Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Inflow Area=5.840 ac 27.76 cfs 27.76 cfs Proposed Condition MN-RPBCWD_v1_Atlas14_24-hr100y_S1 100y 24hr Rainfall=7.41"ARBORGLEN 05112017 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 29HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Link 10L: Irrigation System Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-200.00 hrs, dt= 0.01 hrs Link 10L: Irrigation System Inflow Primary Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)1 0 0.00 cfs 0.00 cfs Proposed Condition MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20"ARBORGLEN 0511201 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 30HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Time span=0.00-200.00 hrs, dt=0.01 hrs, 20001 points Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Sim-Route method - Pond routing by Sim-Route method Runoff Area=1.680 ac 38.00% Impervious Runoff Depth>4.66"Subcatchment 1: Proposed 1A Flow Length=810' Tc=15.5 min CN=74/98 Runoff=0.26 cfs 0.653 af Runoff Area=1.050 ac 4.76% Impervious Runoff Depth>2.93"Subcatchment 2: PROPOSED Flow Length=300' Slope=0.1000 '/' Tc=13.1 min CN=65/98 Runoff=0.12 cfs 0.256 af Runoff Area=3.110 ac 38.00% Impervious Runoff Depth>4.66"Subcatchment 3S: Proposed 1B Flow Length=916' Tc=16.3 min CN=74/98 Runoff=0.49 cfs 1.208 af Peak Elev=899.90' Storage=12,394 cf Inflow=0.75 cfs 1.861 afPond 2P: POND A Primary=0.74 cfs 1.591 af Secondary=0.00 cfs 0.000 af Outflow=0.74 cfs 1.591 af Inflow=0.86 cfs 1.847 afPond WP: WETLAND P Primary=0.86 cfs 1.847 af Inflow=0.00 cfs 0.000 afLink 10L: Irrigation System Primary=0.00 cfs 0.000 af Total Runoff Area = 5.840 ac Runoff Volume = 2.117 af Average Runoff Depth = 4.35" 67.98% Pervious = 3.970 ac 32.02% Impervious = 1.870 ac Proposed Condition MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20"ARBORGLEN 0511201 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 31HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 1: Proposed 1A Runoff = 0.26 cfs @ 121.37 hrs, Volume= 0.653 af, Depth> 4.66" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-200.00 hrs, dt= 0.01 hrs MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20" Area (ac) CN Description 1.680 83 1/4 acre lots, 38% imp, HSG C 0.000 87 1/4 acre lots, 38% imp, HSG D 1.680 83 Weighted Average 1.042 74 62.00% Pervious Area 0.638 98 38.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.3 150 0.0200 0.17 Sheet Flow, Grass: Short n= 0.150 P2= 2.87" 1.2 660 0.0300 9.12 11.19 Pipe Channel, 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.013 Concrete pipe, bends & connections 15.5 810 Total Subcatchment 1: Proposed 1A Runoff Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (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 MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20" Runoff Area=1.680 ac Runoff Volume=0.653 af Runoff Depth>4.66" Flow Length=810' Tc=15.5 min CN=74/98 0.26 cfs Proposed Condition MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20"ARBORGLEN 0511201 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 32HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 2: PROPOSED Runoff = 0.12 cfs @ 121.35 hrs, Volume= 0.256 af, Depth> 2.93" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-200.00 hrs, dt= 0.01 hrs MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20" Area (ac) CN Description 1.000 65 Brush, Good, HSG C 0.050 98 Water Surface, HSG C 1.050 67 Weighted Average 1.000 65 95.24% Pervious Area 0.050 98 4.76% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.1 300 0.1000 0.38 Sheet Flow, Rear Yard Grass: Short n= 0.150 P2= 2.87" Subcatchment 2: PROPOSED Runoff Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)0.125 0.12 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 MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20" Runoff Area=1.050 ac Runoff Volume=0.256 af Runoff Depth>2.93" Flow Length=300' Slope=0.1000 '/' Tc=13.1 min CN=65/98 0.12 cfs Proposed Condition MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20"ARBORGLEN 0511201 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 33HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: Proposed 1B Runoff = 0.49 cfs @ 121.40 hrs, Volume= 1.208 af, Depth> 4.66" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-200.00 hrs, dt= 0.01 hrs MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20" Area (ac) CN Description 3.110 83 1/4 acre lots, 38% imp, HSG C 0.000 87 1/4 acre lots, 38% imp, HSG D 3.110 83 Weighted Average 1.928 74 62.00% Pervious Area 1.182 98 38.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.2 256 0.0500 0.28 Sheet Flow, Grass: Short n= 0.150 P2= 2.87" 1.1 660 0.0300 10.30 18.19 Pipe Channel, RCP_Round 18" 18.0" Round Area= 1.8 sf Perim= 4.7' r= 0.38' n= 0.013 Concrete pipe, bends & connections 16.3 916 Total Subcatchment 3S: Proposed 1B Runoff Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20" Runoff Area=3.110 ac Runoff Volume=1.208 af Runoff Depth>4.66" Flow Length=916' Tc=16.3 min CN=74/98 0.49 cfs Proposed Condition MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20"ARBORGLEN 0511201 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 34HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Pond 2P: POND A Inflow Area = 4.790 ac, 38.00% Impervious, Inflow Depth > 4.66" for RPBCWD-Snowmelt event Inflow = 0.75 cfs @ 121.36 hrs, Volume= 1.861 af Outflow = 0.74 cfs @ 121.52 hrs, Volume= 1.591 af, Atten= 1%, Lag= 9.3 min Primary = 0.74 cfs @ 121.52 hrs, Volume= 1.591 af Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Sim-Route method, Time Span= 0.00-200.00 hrs, dt= 0.01 hrs Peak Elev= 899.90' @ 121.52 hrs Surf.Area= 0 sf Storage= 12,394 cf Plug-Flow detention time= 1,303.3 min calculated for 1.591 af (85% of inflow) Center-of-Mass det. time= 697.9 min ( 8,051.2 - 7,353.3 ) Volume Invert Avail.Storage Storage Description #1 895.99' 25,003 cf Custom Stage Data Listed below Elevation Cum.Store (feet) (cubic-feet) 895.99 0 896.00 4,000 898.00 8,500 900.00 12,600 902.00 17,500 904.00 22,800 910.00 25,003 Device Routing Invert Outlet Devices #1 Device 2 899.50'Custom Weir/Orifice, Cv= 2.62 (C= 3.28) Head (feet) 0.00 2.30 2.30 6.00 Width (feet) 0.90 0.90 4.00 4.00 #2 Primary 898.00'18.0" Round RCP_Round 18" L= 80.0' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 898.00' / 888.00' S= 0.1250 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.77 sf #3 Secondary 904.00'Land EOF, Cv= 2.62 (C= 3.28) Head (feet) 0.00 3.00 Width (feet) 5.00 5.00 Primary OutFlow Max=0.74 cfs @ 121.52 hrs HW=899.90' TW=0.00' (Dynamic Tailwater) 2=RCP_Round 18" (Passes 0.74 cfs of 12.44 cfs potential flow) 1=Custom Weir/Orifice (Weir Controls 0.74 cfs @ 2.07 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=895.99' TW=0.00' (Dynamic Tailwater) 3=Land EOF ( Controls 0.00 cfs) Proposed Condition MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20"ARBORGLEN 0511201 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 35HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Pond 2P: POND A Inflow Outflow Primary Secondary Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)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=4.790 ac Peak Elev=899.90' Storage=12,394 cf 0.75 cfs 0.74 cfs 0.74 cfs 0.00 cfs Proposed Condition MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20"ARBORGLEN 0511201 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 36HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Pond WP: WETLAND P [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.840 ac, 32.02% Impervious, Inflow Depth > 3.80" for RPBCWD-Snowmelt event Inflow = 0.86 cfs @ 121.49 hrs, Volume= 1.847 af Primary = 0.86 cfs @ 121.50 hrs, Volume= 1.847 af, Atten= 0%, Lag= 0.6 min Routing by Sim-Route method, Time Span= 0.00-200.00 hrs, dt= 0.01 hrs Pond WP: WETLAND P Inflow Primary Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (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=5.840 ac 0.86 cfs 0.86 cfs Proposed Condition MN-RPBCWD Snowmelt_10d_100yr RPBCWD-Snowmelt Rainfall=7.20"ARBORGLEN 0511201 Printed 5/16/2017Prepared by Sathre-Bergquist, Inc. Page 37HydroCAD® 10.00-15 s/n 03665 © 2015 HydroCAD Software Solutions LLC Summary for Link 10L: Irrigation System Inflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-200.00 hrs, dt= 0.01 hrs Link 10L: Irrigation System Inflow Primary Hydrograph Time (hours) 2001901801701601501401301201101009080706050403020100Flow (cfs)1 0 0.00 cfs 0.00 cfs