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10.LaMettry - Rate (PROPOSED) - 061815Proposed Improvements 3S POND SURFACE AREA 4S POND INFLOW 5S WETLAND INFLOW(1) 6S WETLAND INFLOW(2) 7P POND 7S DA:P3 8L WETLAND 9S DA:P2 11P Middle Chambers 12P South Chambers 13P North Chambers 14S DA:P1 15L Proposed Treatment Routing Diagram for 04.LaMettry - 061815 Prepared by Sathre-Bergquist, Inc., Printed 6/18/2015 HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Subcat Reach Pond Link PROPOSED IMPROVEMENTS 04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 2HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Area Listing (selected nodes) Area (acres) CN Description (subcatchment-numbers) 1.190 100 (3S) 11.450 98 (4S, 7S, 9S, 14S) 1.240 61 >75% Grass cover, Good, HSG B (6S, 9S, 14S) 3.130 61 >75% Grass cover, Good, HSG B (UNGRADED) (4S) 8.410 58 Meadow, non-grazed, HSG B (5S, 6S) 4.520 58 Meadow, non-grazed, HSG B (UNGRADED) (4S) 29.940 75 TOTAL AREA PROPOSED IMPROVEMENTS 04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 3HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Soil Listing (selected nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 HSG A 17.300 HSG B 4S, 5S, 6S, 9S, 14S 0.000 HSG C 0.000 HSG D 12.640 Other 3S, 4S, 7S, 9S, 14S 29.940 TOTAL AREA PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 4HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: POND SURFACE AREA Runoff = 5.68 cfs @ 11.93 hrs, Volume= 0.278 af, Depth= 2.80" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 2-yr Rainfall=2.80" Area (ac) CN Description * 1.190 100 1.190 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.3 255 12.70 Lake or Reservoir, POND Mean Depth= 5.01' Subcatchment 3S: POND SURFACE AREA Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 6 5 4 3 2 1 0 Atlas 14 24-hr S0 2-yr Rainfall=2.80" Runoff Area=1.190 ac Runoff Volume=0.278 af Runoff Depth=2.80" Flow Length=255' Tc=0.3 min CN=100 5.68 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 5HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 3S: POND SURFACE AREA Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.04 0.03 4.00 0.10 0.10 0.03 6.00 0.16 0.16 0.04 8.00 0.25 0.25 0.06 10.00 0.40 0.40 0.13 12.00 1.58 1.58 5.34 14.00 2.40 2.40 0.13 16.00 2.55 2.55 0.06 18.00 2.64 2.64 0.05 20.00 2.70 2.70 0.03 22.00 2.76 2.76 0.03 24.00 2.80 2.80 0.02 26.00 2.80 2.80 0.00 28.00 2.80 2.80 0.00 30.00 2.80 2.80 0.00 32.00 2.80 2.80 0.00 34.00 2.80 2.80 0.00 36.00 2.80 2.80 0.00 38.00 2.80 2.80 0.00 40.00 2.80 2.80 0.00 42.00 2.80 2.80 0.00 44.00 2.80 2.80 0.00 46.00 2.80 2.80 0.00 48.00 2.80 2.80 0.00 50.00 2.80 2.80 0.00 52.00 2.80 2.80 0.00 54.00 2.80 2.80 0.00 56.00 2.80 2.80 0.00 58.00 2.80 2.80 0.00 60.00 2.80 2.80 0.00 62.00 2.80 2.80 0.00 64.00 2.80 2.80 0.00 66.00 2.80 2.80 0.00 68.00 2.80 2.80 0.00 70.00 2.80 2.80 0.00 72.00 2.80 2.80 0.00 74.00 2.80 2.80 0.00 76.00 2.80 2.80 0.00 78.00 2.80 2.80 0.00 80.00 2.80 2.80 0.00 82.00 2.80 2.80 0.00 84.00 2.80 2.80 0.00 86.00 2.80 2.80 0.00 88.00 2.80 2.80 0.00 90.00 2.80 2.80 0.00 92.00 2.80 2.80 0.00 94.00 2.80 2.80 0.00 96.00 2.80 2.80 0.00 98.00 2.80 2.80 0.00 100.00 2.80 2.80 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 2.80 2.80 0.00 104.00 2.80 2.80 0.00 106.00 2.80 2.80 0.00 108.00 2.80 2.80 0.00 110.00 2.80 2.80 0.00 112.00 2.80 2.80 0.00 114.00 2.80 2.80 0.00 116.00 2.80 2.80 0.00 118.00 2.80 2.80 0.00 120.00 2.80 2.80 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 6HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: POND INFLOW Runoff = 24.57 cfs @ 12.16 hrs, Volume= 1.655 af, Depth= 1.16" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 2-yr Rainfall=2.80" Area (ac) CN Description * 9.450 98 3.130 61 >75% Grass cover, Good, HSG B (UNGRADED) 4.520 58 Meadow, non-grazed, HSG B (UNGRADED) 17.100 81 Weighted Average 7.650 44.74% Pervious Area 9.450 55.26% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 11.5 123 0.0610 0.18 Sheet Flow, GRASS Grass: Dense n= 0.240 P2= 2.80" 0.8 61 0.0260 1.29 Sheet Flow, CURB Smooth surfaces n= 0.011 P2= 2.80" 1.3 875 0.0375 11.51 20.34 Pipe Channel, RCP 18.0" Round Area= 1.8 sf Perim= 4.7' r= 0.38' n= 0.013 Concrete pipe, straight & clean 13.6 1,059 Total Subcatchment 4S: POND INFLOW Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Atlas 14 24-hr S0 2-yr Rainfall=2.80" Runoff Area=17.100 ac Runoff Volume=1.655 af Runoff Depth=1.16" Flow Length=1,059' Tc=13.6 min CN=81 24.57 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 7HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 4S: POND INFLOW Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.00 0.00 4.00 0.10 0.00 0.00 6.00 0.16 0.00 0.00 8.00 0.25 0.00 0.00 10.00 0.40 0.00 0.00 12.00 1.58 0.36 9.29 14.00 2.40 0.87 1.39 16.00 2.55 0.98 0.69 18.00 2.64 1.04 0.50 20.00 2.70 1.09 0.37 22.00 2.76 1.13 0.31 24.00 2.80 1.16 0.27 26.00 2.80 1.16 0.00 28.00 2.80 1.16 0.00 30.00 2.80 1.16 0.00 32.00 2.80 1.16 0.00 34.00 2.80 1.16 0.00 36.00 2.80 1.16 0.00 38.00 2.80 1.16 0.00 40.00 2.80 1.16 0.00 42.00 2.80 1.16 0.00 44.00 2.80 1.16 0.00 46.00 2.80 1.16 0.00 48.00 2.80 1.16 0.00 50.00 2.80 1.16 0.00 52.00 2.80 1.16 0.00 54.00 2.80 1.16 0.00 56.00 2.80 1.16 0.00 58.00 2.80 1.16 0.00 60.00 2.80 1.16 0.00 62.00 2.80 1.16 0.00 64.00 2.80 1.16 0.00 66.00 2.80 1.16 0.00 68.00 2.80 1.16 0.00 70.00 2.80 1.16 0.00 72.00 2.80 1.16 0.00 74.00 2.80 1.16 0.00 76.00 2.80 1.16 0.00 78.00 2.80 1.16 0.00 80.00 2.80 1.16 0.00 82.00 2.80 1.16 0.00 84.00 2.80 1.16 0.00 86.00 2.80 1.16 0.00 88.00 2.80 1.16 0.00 90.00 2.80 1.16 0.00 92.00 2.80 1.16 0.00 94.00 2.80 1.16 0.00 96.00 2.80 1.16 0.00 98.00 2.80 1.16 0.00 100.00 2.80 1.16 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 2.80 1.16 0.00 104.00 2.80 1.16 0.00 106.00 2.80 1.16 0.00 108.00 2.80 1.16 0.00 110.00 2.80 1.16 0.00 112.00 2.80 1.16 0.00 114.00 2.80 1.16 0.00 116.00 2.80 1.16 0.00 118.00 2.80 1.16 0.00 120.00 2.80 1.16 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 8HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: WETLAND INFLOW(1) Runoff = 0.50 cfs @ 12.52 hrs, Volume= 0.096 af, Depth= 0.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 2-yr Rainfall=2.80" Area (ac) CN Description 5.400 58 Meadow, non-grazed, HSG B 5.400 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 21.1 300 0.0800 0.24 Sheet Flow, GRASS Grass: Dense n= 0.240 P2= 2.80" 3.4 569 0.0343 2.78 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 24.5 869 Total Subcatchment 5S: WETLAND INFLOW(1) Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Atlas 14 24-hr S0 2-yr Rainfall=2.80" Runoff Area=5.400 ac Runoff Volume=0.096 af Runoff Depth=0.21" Flow Length=869' Tc=24.5 min CN=58 0.50 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 9HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 5S: WETLAND INFLOW(1) Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.00 0.00 4.00 0.10 0.00 0.00 6.00 0.16 0.00 0.00 8.00 0.25 0.00 0.00 10.00 0.40 0.00 0.00 12.00 1.58 0.00 0.00 14.00 2.40 0.11 0.15 16.00 2.55 0.15 0.08 18.00 2.64 0.17 0.06 20.00 2.70 0.19 0.04 22.00 2.76 0.20 0.04 24.00 2.80 0.21 0.03 26.00 2.80 0.21 0.00 28.00 2.80 0.21 0.00 30.00 2.80 0.21 0.00 32.00 2.80 0.21 0.00 34.00 2.80 0.21 0.00 36.00 2.80 0.21 0.00 38.00 2.80 0.21 0.00 40.00 2.80 0.21 0.00 42.00 2.80 0.21 0.00 44.00 2.80 0.21 0.00 46.00 2.80 0.21 0.00 48.00 2.80 0.21 0.00 50.00 2.80 0.21 0.00 52.00 2.80 0.21 0.00 54.00 2.80 0.21 0.00 56.00 2.80 0.21 0.00 58.00 2.80 0.21 0.00 60.00 2.80 0.21 0.00 62.00 2.80 0.21 0.00 64.00 2.80 0.21 0.00 66.00 2.80 0.21 0.00 68.00 2.80 0.21 0.00 70.00 2.80 0.21 0.00 72.00 2.80 0.21 0.00 74.00 2.80 0.21 0.00 76.00 2.80 0.21 0.00 78.00 2.80 0.21 0.00 80.00 2.80 0.21 0.00 82.00 2.80 0.21 0.00 84.00 2.80 0.21 0.00 86.00 2.80 0.21 0.00 88.00 2.80 0.21 0.00 90.00 2.80 0.21 0.00 92.00 2.80 0.21 0.00 94.00 2.80 0.21 0.00 96.00 2.80 0.21 0.00 98.00 2.80 0.21 0.00 100.00 2.80 0.21 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 2.80 0.21 0.00 104.00 2.80 0.21 0.00 106.00 2.80 0.21 0.00 108.00 2.80 0.21 0.00 110.00 2.80 0.21 0.00 112.00 2.80 0.21 0.00 114.00 2.80 0.21 0.00 116.00 2.80 0.21 0.00 118.00 2.80 0.21 0.00 120.00 2.80 0.21 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 10HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: WETLAND INFLOW(2) Runoff = 0.41 cfs @ 12.50 hrs, Volume= 0.072 af, Depth= 0.24" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 2-yr Rainfall=2.80" Area (ac) CN Description 3.010 58 Meadow, non-grazed, HSG B 0.640 61 >75% Grass cover, Good, HSG B 3.650 59 Weighted Average 3.650 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 23.7 300 0.0600 0.21 Sheet Flow, GRASS Grass: Dense n= 0.240 P2= 2.80" 0.3 89 0.1350 5.51 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 24.0 389 Total Subcatchment 6S: WETLAND INFLOW(2) Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 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 Atlas 14 24-hr S0 2-yr Rainfall=2.80" Runoff Area=3.650 ac Runoff Volume=0.072 af Runoff Depth=0.24" Flow Length=389' Tc=24.0 min CN=59 0.41 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 11HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: WETLAND INFLOW(2) Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.00 0.00 4.00 0.10 0.00 0.00 6.00 0.16 0.00 0.00 8.00 0.25 0.00 0.00 10.00 0.40 0.00 0.00 12.00 1.58 0.00 0.00 14.00 2.40 0.13 0.11 16.00 2.55 0.17 0.06 18.00 2.64 0.19 0.04 20.00 2.70 0.21 0.03 22.00 2.76 0.22 0.03 24.00 2.80 0.24 0.02 26.00 2.80 0.24 0.00 28.00 2.80 0.24 0.00 30.00 2.80 0.24 0.00 32.00 2.80 0.24 0.00 34.00 2.80 0.24 0.00 36.00 2.80 0.24 0.00 38.00 2.80 0.24 0.00 40.00 2.80 0.24 0.00 42.00 2.80 0.24 0.00 44.00 2.80 0.24 0.00 46.00 2.80 0.24 0.00 48.00 2.80 0.24 0.00 50.00 2.80 0.24 0.00 52.00 2.80 0.24 0.00 54.00 2.80 0.24 0.00 56.00 2.80 0.24 0.00 58.00 2.80 0.24 0.00 60.00 2.80 0.24 0.00 62.00 2.80 0.24 0.00 64.00 2.80 0.24 0.00 66.00 2.80 0.24 0.00 68.00 2.80 0.24 0.00 70.00 2.80 0.24 0.00 72.00 2.80 0.24 0.00 74.00 2.80 0.24 0.00 76.00 2.80 0.24 0.00 78.00 2.80 0.24 0.00 80.00 2.80 0.24 0.00 82.00 2.80 0.24 0.00 84.00 2.80 0.24 0.00 86.00 2.80 0.24 0.00 88.00 2.80 0.24 0.00 90.00 2.80 0.24 0.00 92.00 2.80 0.24 0.00 94.00 2.80 0.24 0.00 96.00 2.80 0.24 0.00 98.00 2.80 0.24 0.00 100.00 2.80 0.24 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 2.80 0.24 0.00 104.00 2.80 0.24 0.00 106.00 2.80 0.24 0.00 108.00 2.80 0.24 0.00 110.00 2.80 0.24 0.00 112.00 2.80 0.24 0.00 114.00 2.80 0.24 0.00 116.00 2.80 0.24 0.00 118.00 2.80 0.24 0.00 120.00 2.80 0.24 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 12HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Pond 7P: POND Inflow Area = 20.890 ac, 60.51% Impervious, Inflow Depth = 1.17" for 2-yr event Inflow = 26.09 cfs @ 12.16 hrs, Volume= 2.037 af Outflow = 1.93 cfs @ 13.85 hrs, Volume= 2.001 af, Atten= 93%, Lag= 101.5 min Primary = 1.93 cfs @ 13.85 hrs, Volume= 2.001 af Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs / 2 Starting Elev= 906.00' Surf.Area= 51,912 sf Storage= 256,706 cf Peak Elev= 907.03' @ 13.85 hrs Surf.Area= 56,652 sf Storage= 312,582 cf (55,875 cf above start) Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= 716.1 min ( 1,530.4 - 814.3 ) Volume Invert Avail.Storage Storage Description #1 897.00' 499,920 cf Custom Stage Data (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 897.00 0 0.0 0 0 0 898.00 17,063 702.0 5,688 5,688 39,218 900.00 23,171 823.0 40,079 45,766 53,981 902.00 30,413 919.3 53,420 99,186 67,446 904.00 37,850 1,008.5 68,128 167,314 81,265 906.00 51,912 1,152.3 89,393 256,706 106,086 908.00 61,309 1,206.3 113,091 369,797 116,492 908.50 63,774 1,214.0 31,269 401,066 118,094 909.00 66,330 1,235.0 32,524 433,590 122,232 910.00 66,330 1,235.0 66,330 499,920 123,467 Device Routing Invert Outlet Devices #1 Secondary 910.50'120.0" W x 6.0" H Box RIP RAP OVERFLOW L= 25.0' Ke= 1.000 Inlet / Outlet Invert= 910.50' / 905.30' S= 0.2080 '/' Cc= 0.900 n= 0.035, Flow Area= 5.00 sf #2 Primary 905.20'27.0" Round OUTLET PIPE L= 30.0' RCP, mitered to conform to fill, Ke= 0.700 Inlet / Outlet Invert= 905.20' / 904.50' S= 0.0233 '/' Cc= 0.900 n= 0.013 Concrete pipe, straight & clean, Flow Area= 3.98 sf #3 Device 2 906.00'5' SLOTTED WIER, Cv= 2.62 (C= 3.28) Head (feet) 0.00 1.00 1.00 2.50 2.50 Width (feet) 0.40 0.75 5.00 5.00 0.00 #4 Device 3 902.00'27.0" Round INLET PIPE L= 32.0' CMP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 901.00' / 902.00' S= -0.0313 '/' Cc= 0.900 n= 0.030 Corrugated metal, Flow Area= 3.98 sf #5 Device 2 908.50'5.0" Horiz. Top Grate C= 0.600 Limited to weir flow at low heads #6 Secondary 908.50'Overland Overflow, Cv= 2.62 (C= 3.28) Head (feet) 0.00 0.50 0.50 1.00 Width (feet) 10.00 12.00 100.00 100.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 13HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Primary OutFlow Max=1.93 cfs @ 13.85 hrs HW=907.03' TW=0.00' (Dynamic Tailwater) 2=OUTLET PIPE (Passes 1.93 cfs of 14.07 cfs potential flow) 3=5' SLOTTED WIER (Weir Controls 1.93 cfs @ 2.67 fps) 4=INLET PIPE (Passes 1.93 cfs of 15.34 cfs potential flow) 5=Top Grate ( Controls 0.00 cfs) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=906.00' TW=0.00' (Dynamic Tailwater) 1=RIP RAP OVERFLOW ( Controls 0.00 cfs) 6=Overland Overflow ( Controls 0.00 cfs) Pond 7P: POND Inflow Outflow Primary Secondary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Inflow Area=20.890 ac Peak Elev=907.03' Storage=312,582 cf 26.09 cfs 1.93 cfs 1.93 cfs 0.00 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 14HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Pond 7P: POND Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Primary (cfs) Secondary (cfs) 0.00 0.00 256,707 906.00 0.00 0.00 0.00 5.00 0.04 257,242 906.01 0.00 0.00 0.00 10.00 0.13 258,368 906.03 0.01 0.01 0.00 15.00 1.22 311,082 907.00 1.78 1.78 0.00 20.00 0.40 297,210 906.76 1.09 1.09 0.00 25.00 0.00 286,736 906.56 0.67 0.67 0.00 30.00 0.00 277,725 906.40 0.37 0.37 0.00 35.00 0.00 272,371 906.30 0.24 0.24 0.00 40.00 0.00 268,889 906.23 0.16 0.16 0.00 45.00 0.00 266,480 906.19 0.11 0.11 0.00 50.00 0.00 264,736 906.15 0.08 0.08 0.00 55.00 0.00 263,429 906.13 0.06 0.06 0.00 60.00 0.00 262,422 906.11 0.05 0.05 0.00 65.00 0.00 261,629 906.09 0.04 0.04 0.00 70.00 0.00 260,993 906.08 0.03 0.03 0.00 75.00 0.00 260,473 906.07 0.03 0.03 0.00 80.00 0.00 260,044 906.06 0.02 0.02 0.00 85.00 0.00 259,685 906.06 0.02 0.02 0.00 90.00 0.00 259,381 906.05 0.02 0.02 0.00 95.00 0.00 259,122 906.05 0.01 0.01 0.00 100.00 0.00 258,899 906.04 0.01 0.01 0.00 105.00 0.00 258,705 906.04 0.01 0.01 0.00 110.00 0.00 258,536 906.04 0.01 0.01 0.00 115.00 0.00 258,388 906.03 0.01 0.01 0.00 120.00 0.00 258,257 906.03 0.01 0.01 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 15HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 7S: DA:P3 Runoff = 1.72 cfs @ 12.08 hrs, Volume= 0.107 af, Depth= 2.57" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 2-yr Rainfall=2.80" Area (ac) CN Description * 0.500 98 0.500 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 7S: DA:P3 Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 1 0 Atlas 14 24-hr S0 2-yr Rainfall=2.80" Runoff Area=0.500 ac Runoff Volume=0.107 af Runoff Depth=2.57" Tc=10.0 min CN=98 1.72 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 16HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 7S: DA:P3 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.00 0.00 4.00 0.10 0.01 0.01 6.00 0.16 0.04 0.01 8.00 0.25 0.11 0.02 10.00 0.40 0.23 0.04 12.00 1.58 1.36 1.06 14.00 2.40 2.17 0.06 16.00 2.55 2.32 0.03 18.00 2.64 2.41 0.02 20.00 2.70 2.47 0.01 22.00 2.76 2.53 0.01 24.00 2.80 2.57 0.01 26.00 2.80 2.57 0.00 28.00 2.80 2.57 0.00 30.00 2.80 2.57 0.00 32.00 2.80 2.57 0.00 34.00 2.80 2.57 0.00 36.00 2.80 2.57 0.00 38.00 2.80 2.57 0.00 40.00 2.80 2.57 0.00 42.00 2.80 2.57 0.00 44.00 2.80 2.57 0.00 46.00 2.80 2.57 0.00 48.00 2.80 2.57 0.00 50.00 2.80 2.57 0.00 52.00 2.80 2.57 0.00 54.00 2.80 2.57 0.00 56.00 2.80 2.57 0.00 58.00 2.80 2.57 0.00 60.00 2.80 2.57 0.00 62.00 2.80 2.57 0.00 64.00 2.80 2.57 0.00 66.00 2.80 2.57 0.00 68.00 2.80 2.57 0.00 70.00 2.80 2.57 0.00 72.00 2.80 2.57 0.00 74.00 2.80 2.57 0.00 76.00 2.80 2.57 0.00 78.00 2.80 2.57 0.00 80.00 2.80 2.57 0.00 82.00 2.80 2.57 0.00 84.00 2.80 2.57 0.00 86.00 2.80 2.57 0.00 88.00 2.80 2.57 0.00 90.00 2.80 2.57 0.00 92.00 2.80 2.57 0.00 94.00 2.80 2.57 0.00 96.00 2.80 2.57 0.00 98.00 2.80 2.57 0.00 100.00 2.80 2.57 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 2.80 2.57 0.00 104.00 2.80 2.57 0.00 106.00 2.80 2.57 0.00 108.00 2.80 2.57 0.00 110.00 2.80 2.57 0.00 112.00 2.80 2.57 0.00 114.00 2.80 2.57 0.00 116.00 2.80 2.57 0.00 118.00 2.80 2.57 0.00 120.00 2.80 2.57 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 17HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Link 8L: WETLAND Inflow Area = 29.940 ac, 42.22% Impervious, Inflow Depth > 0.87" for 2-yr event Inflow = 2.29 cfs @ 12.72 hrs, Volume= 2.169 af Primary = 2.29 cfs @ 12.72 hrs, Volume= 2.169 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Link 8L: WETLAND Inflow Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 2 1 0 Inflow Area=29.940 ac 2.29 cfs 2.29 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 18HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Link 8L: WETLAND Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 0.00 0.00 2.00 0.00 0.00 0.00 4.00 0.00 0.00 0.00 6.00 0.00 0.00 0.00 8.00 0.00 0.00 0.00 10.00 0.01 0.00 0.01 12.00 0.16 0.00 0.16 14.00 2.19 0.00 2.19 16.00 1.77 0.00 1.77 18.00 1.44 0.00 1.44 20.00 1.16 0.00 1.16 22.00 0.96 0.00 0.96 24.00 0.81 0.00 0.81 26.00 0.59 0.00 0.59 28.00 0.46 0.00 0.46 30.00 0.37 0.00 0.37 32.00 0.31 0.00 0.31 34.00 0.26 0.00 0.26 36.00 0.22 0.00 0.22 38.00 0.18 0.00 0.18 40.00 0.16 0.00 0.16 42.00 0.14 0.00 0.14 44.00 0.12 0.00 0.12 46.00 0.11 0.00 0.11 48.00 0.09 0.00 0.09 50.00 0.08 0.00 0.08 52.00 0.07 0.00 0.07 54.00 0.07 0.00 0.07 56.00 0.06 0.00 0.06 58.00 0.05 0.00 0.05 60.00 0.05 0.00 0.05 62.00 0.04 0.00 0.04 64.00 0.04 0.00 0.04 66.00 0.04 0.00 0.04 68.00 0.03 0.00 0.03 70.00 0.03 0.00 0.03 72.00 0.03 0.00 0.03 74.00 0.03 0.00 0.03 76.00 0.03 0.00 0.03 78.00 0.02 0.00 0.02 80.00 0.02 0.00 0.02 82.00 0.02 0.00 0.02 84.00 0.02 0.00 0.02 86.00 0.02 0.00 0.02 88.00 0.02 0.00 0.02 90.00 0.02 0.00 0.02 92.00 0.01 0.00 0.01 94.00 0.01 0.00 0.01 96.00 0.01 0.00 0.01 98.00 0.01 0.00 0.01 100.00 0.01 0.00 0.01 Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 102.00 0.01 0.00 0.01 104.00 0.01 0.00 0.01 106.00 0.01 0.00 0.01 108.00 0.01 0.00 0.01 110.00 0.01 0.00 0.01 112.00 0.01 0.00 0.01 114.00 0.01 0.00 0.01 116.00 0.01 0.00 0.01 118.00 0.01 0.00 0.01 120.00 0.01 0.00 0.01 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 19HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 9S: DA:P2 Runoff = 1.90 cfs @ 12.17 hrs, Volume= 0.130 af, Depth= 1.42" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 2-yr Rainfall=2.80" Area (ac) CN Description * 0.700 98 0.400 61 >75% Grass cover, Good, HSG B 1.100 85 Weighted Average 0.400 36.36% Pervious Area 0.700 63.64% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 Direct Entry, Subcatchment 9S: DA:P2 Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 2 1 0 Atlas 14 24-hr S0 2-yr Rainfall=2.80" Runoff Area=1.100 ac Runoff Volume=0.130 af Runoff Depth=1.42" Tc=15.0 min CN=85 1.90 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 20HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 9S: DA:P2 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.00 0.00 4.00 0.10 0.00 0.00 6.00 0.16 0.00 0.00 8.00 0.25 0.00 0.00 10.00 0.40 0.00 0.00 12.00 1.58 0.50 0.72 14.00 2.40 1.10 0.10 16.00 2.55 1.22 0.05 18.00 2.64 1.29 0.04 20.00 2.70 1.34 0.03 22.00 2.76 1.39 0.02 24.00 2.80 1.42 0.02 26.00 2.80 1.42 0.00 28.00 2.80 1.42 0.00 30.00 2.80 1.42 0.00 32.00 2.80 1.42 0.00 34.00 2.80 1.42 0.00 36.00 2.80 1.42 0.00 38.00 2.80 1.42 0.00 40.00 2.80 1.42 0.00 42.00 2.80 1.42 0.00 44.00 2.80 1.42 0.00 46.00 2.80 1.42 0.00 48.00 2.80 1.42 0.00 50.00 2.80 1.42 0.00 52.00 2.80 1.42 0.00 54.00 2.80 1.42 0.00 56.00 2.80 1.42 0.00 58.00 2.80 1.42 0.00 60.00 2.80 1.42 0.00 62.00 2.80 1.42 0.00 64.00 2.80 1.42 0.00 66.00 2.80 1.42 0.00 68.00 2.80 1.42 0.00 70.00 2.80 1.42 0.00 72.00 2.80 1.42 0.00 74.00 2.80 1.42 0.00 76.00 2.80 1.42 0.00 78.00 2.80 1.42 0.00 80.00 2.80 1.42 0.00 82.00 2.80 1.42 0.00 84.00 2.80 1.42 0.00 86.00 2.80 1.42 0.00 88.00 2.80 1.42 0.00 90.00 2.80 1.42 0.00 92.00 2.80 1.42 0.00 94.00 2.80 1.42 0.00 96.00 2.80 1.42 0.00 98.00 2.80 1.42 0.00 100.00 2.80 1.42 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 2.80 1.42 0.00 104.00 2.80 1.42 0.00 106.00 2.80 1.42 0.00 108.00 2.80 1.42 0.00 110.00 2.80 1.42 0.00 112.00 2.80 1.42 0.00 114.00 2.80 1.42 0.00 116.00 2.80 1.42 0.00 118.00 2.80 1.42 0.00 120.00 2.80 1.42 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 21HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Pond 11P: Middle Chambers Inflow Area = 1.100 ac, 63.64% Impervious, Inflow Depth = 1.42" for 2-yr event Inflow = 1.90 cfs @ 12.17 hrs, Volume= 0.130 af Outflow = 0.22 cfs @ 13.14 hrs, Volume= 0.130 af, Atten= 88%, Lag= 58.4 min Discarded = 0.03 cfs @ 13.14 hrs, Volume= 0.105 af Primary = 0.19 cfs @ 13.14 hrs, Volume= 0.025 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 946.76' @ 13.14 hrs Surf.Area= 4,228 sf Storage= 3,405 cf Plug-Flow detention time= 855.4 min calculated for 0.130 af (100% of inflow) Center-of-Mass det. time= 855.4 min ( 1,675.6 - 820.2 ) Volume Invert Avail.Storage Storage Description #1A 945.50' 2,992 cf 56.75'W x 74.50'L x 2.54'H Field A 10,746 cf Overall - 3,265 cf Embedded = 7,481 cf x 40.0% Voids #2A 946.00' 3,265 cf Cultec R-150XLHD x 119 Inside #1 Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 17 rows 6,257 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 946.00'15.0" Round EX. 15" RCP L= 20.0' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 946.00' / 945.90' S= 0.0050 '/' Cc= 0.900 n= 0.013 Concrete pipe, straight & clean, Flow Area= 1.23 sf #2 Device 1 946.70'Weir Wall, Cv= 2.62 (C= 3.28) Head (feet) 0.00 1.00 1.00 2.30 Width (feet) 4.00 4.00 4.00 4.00 #3 Discarded 945.50'0.300 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.03 cfs @ 13.14 hrs HW=946.76' (Free Discharge) 3=Exfiltration (Exfiltration Controls 0.03 cfs) Primary OutFlow Max=0.19 cfs @ 13.14 hrs HW=946.76' TW=0.00' (Dynamic Tailwater) 1=EX. 15" RCP (Passes 0.19 cfs of 1.86 cfs potential flow) 2=Weir Wall (Weir Controls 0.19 cfs @ 0.80 fps) PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 22HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 11P: Middle Chambers - Chamber Wizard Field A Chamber Model = Cultec R-150XLHD (Cultec Recharger® 150XLHD) Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 17 rows 33.0" Wide + 6.0" Spacing = 39.0" C-C Row Spacing 7 Chambers/Row x 10.25' Long +0.75' Row Adjustment = 72.50' Row Length +12.0" End Stone x 2 = 74.50' Base Length 17 Rows x 33.0" Wide + 6.0" Spacing x 16 + 12.0" Side Stone x 2 = 56.75' Base Width 6.0" Base + 18.5" Chamber Height + 6.0" Cover = 2.54' Field Height 119 Chambers x 27.2 cf +0.75' Row Adjustment x 2.65 sf x 17 Rows = 3,264.9 cf Chamber Storage 10,745.8 cf Field - 3,264.9 cf Chambers = 7,481.0 cf Stone x 40.0% Voids = 2,992.4 cf Stone Storage Chamber Storage + Stone Storage = 6,257.3 cf = 0.144 af Overall Storage Efficiency = 58.2% 119 Chambers 398.0 cy Field 277.1 cy Stone PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 23HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 11P: Middle Chambers Inflow Outflow Discarded Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 2 1 0 Inflow Area=1.100 ac Peak Elev=946.76' Storage=3,405 cf 1.90 cfs 0.22 cfs 0.03 cfs 0.19 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 24HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Pond 11P: Middle Chambers Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Discarded (cfs) Primary (cfs) 0.00 0.00 0 945.50 0.00 0.00 0.00 5.00 0.00 0 945.50 0.00 0.00 0.00 10.00 0.00 1 945.50 0.00 0.00 0.00 15.00 0.07 3,290 946.72 0.08 0.03 0.05 20.00 0.03 3,207 946.70 0.03 0.03 0.00 25.00 0.00 2,975 946.63 0.03 0.03 0.00 30.00 0.00 2,413 946.46 0.03 0.03 0.00 35.00 0.00 1,856 946.29 0.03 0.03 0.00 40.00 0.00 1,304 946.13 0.03 0.03 0.00 45.00 0.00 757 945.95 0.03 0.03 0.00 50.00 0.00 219 945.63 0.03 0.03 0.00 55.00 0.00 0 945.50 0.00 0.00 0.00 60.00 0.00 0 945.50 0.00 0.00 0.00 65.00 0.00 0 945.50 0.00 0.00 0.00 70.00 0.00 0 945.50 0.00 0.00 0.00 75.00 0.00 0 945.50 0.00 0.00 0.00 80.00 0.00 0 945.50 0.00 0.00 0.00 85.00 0.00 0 945.50 0.00 0.00 0.00 90.00 0.00 0 945.50 0.00 0.00 0.00 95.00 0.00 0 945.50 0.00 0.00 0.00 100.00 0.00 0 945.50 0.00 0.00 0.00 105.00 0.00 0 945.50 0.00 0.00 0.00 110.00 0.00 0 945.50 0.00 0.00 0.00 115.00 0.00 0 945.50 0.00 0.00 0.00 120.00 0.00 0 945.50 0.00 0.00 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 25HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Pond 12P: South Chambers Inflow Area = 0.500 ac,100.00% Impervious, Inflow Depth = 2.57" for 2-yr event Inflow = 1.72 cfs @ 12.08 hrs, Volume= 0.107 af Outflow = 0.33 cfs @ 12.50 hrs, Volume= 0.107 af, Atten= 81%, Lag= 24.9 min Discarded = 0.02 cfs @ 12.50 hrs, Volume= 0.071 af Primary = 0.31 cfs @ 12.50 hrs, Volume= 0.036 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 938.53' @ 12.50 hrs Surf.Area= 2,533 sf Storage= 2,512 cf Plug-Flow detention time= 632.1 min calculated for 0.107 af (100% of inflow) Center-of-Mass det. time= 632.2 min ( 1,390.8 - 758.6 ) Volume Invert Avail.Storage Storage Description #1A 937.00' 1,807 cf 34.00'W x 74.50'L x 2.54'H Field A 6,438 cf Overall - 1,921 cf Embedded = 4,518 cf x 40.0% Voids #2A 937.50' 1,921 cf Cultec R-150XLHD x 70 Inside #1 Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 10 rows 3,728 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 937.50'15.0" Round 15" RCP L= 20.0' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 937.50' / 937.40' S= 0.0050 '/' Cc= 0.900 n= 0.013 Concrete pipe, straight & clean, Flow Area= 1.23 sf #2 Device 1 938.20'Weir Wall, Cv= 2.62 (C= 3.28) Head (feet) 0.00 1.00 1.00 1.30 Width (feet) 0.50 0.50 4.00 4.00 #3 Discarded 937.00'0.300 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.02 cfs @ 12.50 hrs HW=938.53' (Free Discharge) 3=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=0.31 cfs @ 12.50 hrs HW=938.53' TW=0.00' (Dynamic Tailwater) 1=15" RCP (Passes 0.31 cfs of 3.11 cfs potential flow) 2=Weir Wall (Weir Controls 0.31 cfs @ 1.88 fps) PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 26HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 12P: South Chambers - Chamber Wizard Field A Chamber Model = Cultec R-150XLHD (Cultec Recharger® 150XLHD) Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 10 rows 33.0" Wide + 6.0" Spacing = 39.0" C-C Row Spacing 7 Chambers/Row x 10.25' Long +0.75' Row Adjustment = 72.50' Row Length +12.0" End Stone x 2 = 74.50' Base Length 10 Rows x 33.0" Wide + 6.0" Spacing x 9 + 12.0" Side Stone x 2 = 34.00' Base Width 6.0" Base + 18.5" Chamber Height + 6.0" Cover = 2.54' Field Height 70 Chambers x 27.2 cf +0.75' Row Adjustment x 2.65 sf x 10 Rows = 1,920.5 cf Chamber Storage 6,438.0 cf Field - 1,920.5 cf Chambers = 4,517.5 cf Stone x 40.0% Voids = 1,807.0 cf Stone Storage Chamber Storage + Stone Storage = 3,727.5 cf = 0.086 af Overall Storage Efficiency = 57.9% 70 Chambers 238.4 cy Field 167.3 cy Stone PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 27HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 12P: South Chambers Inflow Outflow Discarded Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 1 0 Inflow Area=0.500 ac Peak Elev=938.53' Storage=2,512 cf 1.72 cfs 0.33 cfs 0.02 cfs 0.31 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 28HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Pond 12P: South Chambers Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Discarded (cfs) Primary (cfs) 0.00 0.00 0 937.00 0.00 0.00 0.00 5.00 0.01 4 937.00 0.01 0.01 0.00 10.00 0.04 96 937.09 0.02 0.02 0.00 15.00 0.04 2,065 938.28 0.06 0.02 0.04 20.00 0.01 1,917 938.20 0.02 0.02 0.00 25.00 0.00 1,750 938.12 0.02 0.02 0.00 30.00 0.00 1,405 937.94 0.02 0.02 0.00 35.00 0.00 1,065 937.77 0.02 0.02 0.00 40.00 0.00 730 937.61 0.02 0.02 0.00 45.00 0.00 399 937.39 0.02 0.02 0.00 50.00 0.00 76 937.08 0.02 0.02 0.00 55.00 0.00 0 937.00 0.00 0.00 0.00 60.00 0.00 0 937.00 0.00 0.00 0.00 65.00 0.00 0 937.00 0.00 0.00 0.00 70.00 0.00 0 937.00 0.00 0.00 0.00 75.00 0.00 0 937.00 0.00 0.00 0.00 80.00 0.00 0 937.00 0.00 0.00 0.00 85.00 0.00 0 937.00 0.00 0.00 0.00 90.00 0.00 0 937.00 0.00 0.00 0.00 95.00 0.00 0 937.00 0.00 0.00 0.00 100.00 0.00 0 937.00 0.00 0.00 0.00 105.00 0.00 0 937.00 0.00 0.00 0.00 110.00 0.00 0 937.00 0.00 0.00 0.00 115.00 0.00 0 937.00 0.00 0.00 0.00 120.00 0.00 0 937.00 0.00 0.00 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 29HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Pond 13P: North Chambers Inflow Area = 1.000 ac, 80.00% Impervious, Inflow Depth = 1.89" for 2-yr event Inflow = 2.73 cfs @ 12.09 hrs, Volume= 0.157 af Outflow = 0.47 cfs @ 12.59 hrs, Volume= 0.157 af, Atten= 83%, Lag= 30.0 min Discarded = 0.03 cfs @ 12.59 hrs, Volume= 0.115 af Primary = 0.44 cfs @ 12.59 hrs, Volume= 0.042 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 946.80' @ 12.59 hrs Surf.Area= 4,465 sf Storage= 3,745 cf Plug-Flow detention time= 750.6 min calculated for 0.157 af (100% of inflow) Center-of-Mass det. time= 750.7 min ( 1,547.6 - 796.9 ) Volume Invert Avail.Storage Storage Description #1A 945.50' 3,160 cf 47.00'W x 95.00'L x 2.54'H Field A 11,349 cf Overall - 3,449 cf Embedded = 7,900 cf x 40.0% Voids #2A 946.00' 3,449 cf Cultec R-150XLHD x 126 Inside #1 Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 14 rows 6,609 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 946.00'15.0" Round EX. 15" RCP L= 65.0' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 946.00' / 945.80' S= 0.0031 '/' Cc= 0.900 n= 0.013 Concrete pipe, straight & clean, Flow Area= 1.23 sf #2 Device 1 946.70'Weir Wall, Cv= 2.62 (C= 3.28) Head (feet) 0.00 1.00 2.00 2.30 Width (feet) 4.00 4.00 4.00 4.00 #3 Discarded 945.50'0.300 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.03 cfs @ 12.59 hrs HW=946.80' (Free Discharge) 3=Exfiltration (Exfiltration Controls 0.03 cfs) Primary OutFlow Max=0.44 cfs @ 12.59 hrs HW=946.80' TW=0.00' (Dynamic Tailwater) 1=EX. 15" RCP (Passes 0.44 cfs of 1.83 cfs potential flow) 2=Weir Wall (Weir Controls 0.44 cfs @ 1.06 fps) PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 30HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 13P: North Chambers - Chamber Wizard Field A Chamber Model = Cultec R-150XLHD (Cultec Recharger® 150XLHD) Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 14 rows 33.0" Wide + 6.0" Spacing = 39.0" C-C Row Spacing 9 Chambers/Row x 10.25' Long +0.75' Row Adjustment = 93.00' Row Length +12.0" End Stone x 2 = 95.00' Base Length 14 Rows x 33.0" Wide + 6.0" Spacing x 13 + 12.0" Side Stone x 2 = 47.00' Base Width 6.0" Base + 18.5" Chamber Height + 6.0" Cover = 2.54' Field Height 126 Chambers x 27.2 cf +0.75' Row Adjustment x 2.65 sf x 14 Rows = 3,449.0 cf Chamber Storage 11,348.5 cf Field - 3,449.0 cf Chambers = 7,899.5 cf Stone x 40.0% Voids = 3,159.8 cf Stone Storage Chamber Storage + Stone Storage = 6,608.8 cf = 0.152 af Overall Storage Efficiency = 58.2% 126 Chambers 420.3 cy Field 292.6 cy Stone PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 31HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 13P: North Chambers Inflow Outflow Discarded Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 3 2 1 0 Inflow Area=1.000 ac Peak Elev=946.80' Storage=3,745 cf 2.73 cfs 0.47 cfs 0.03 cfs 0.44 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 32HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Pond 13P: North Chambers Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Discarded (cfs) Primary (cfs) 0.00 0.00 0 945.50 0.00 0.00 0.00 5.00 0.00 0 945.50 0.00 0.00 0.00 10.00 0.03 15 945.51 0.03 0.03 0.00 15.00 0.07 3,475 946.72 0.08 0.03 0.05 20.00 0.03 3,381 946.70 0.03 0.03 0.00 25.00 0.00 3,117 946.62 0.03 0.03 0.00 30.00 0.00 2,522 946.45 0.03 0.03 0.00 35.00 0.00 1,933 946.28 0.03 0.03 0.00 40.00 0.00 1,350 946.12 0.03 0.03 0.00 45.00 0.00 773 945.93 0.03 0.03 0.00 50.00 0.00 205 945.61 0.03 0.03 0.00 55.00 0.00 0 945.50 0.00 0.00 0.00 60.00 0.00 0 945.50 0.00 0.00 0.00 65.00 0.00 0 945.50 0.00 0.00 0.00 70.00 0.00 0 945.50 0.00 0.00 0.00 75.00 0.00 0 945.50 0.00 0.00 0.00 80.00 0.00 0 945.50 0.00 0.00 0.00 85.00 0.00 0 945.50 0.00 0.00 0.00 90.00 0.00 0 945.50 0.00 0.00 0.00 95.00 0.00 0 945.50 0.00 0.00 0.00 100.00 0.00 0 945.50 0.00 0.00 0.00 105.00 0.00 0 945.50 0.00 0.00 0.00 110.00 0.00 0 945.50 0.00 0.00 0.00 115.00 0.00 0 945.50 0.00 0.00 0.00 120.00 0.00 0 945.50 0.00 0.00 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 33HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 14S: DA:P1 Runoff = 2.73 cfs @ 12.09 hrs, Volume= 0.157 af, Depth= 1.89" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 2-yr Rainfall=2.80" Area (ac) CN Description * 0.800 98 0.200 61 >75% Grass cover, Good, HSG B 1.000 91 Weighted Average 0.200 20.00% Pervious Area 0.800 80.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 14S: DA:P1 Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 3 2 1 0 Atlas 14 24-hr S0 2-yr Rainfall=2.80" Runoff Area=1.000 ac Runoff Volume=0.157 af Runoff Depth=1.89" Tc=10.0 min CN=91 2.73 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 34HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 14S: DA:P1 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.00 0.00 4.00 0.10 0.00 0.00 6.00 0.16 0.00 0.00 8.00 0.25 0.00 0.00 10.00 0.40 0.04 0.03 12.00 1.58 0.80 1.58 14.00 2.40 1.52 0.10 16.00 2.55 1.66 0.05 18.00 2.64 1.74 0.04 20.00 2.70 1.80 0.03 22.00 2.76 1.85 0.02 24.00 2.80 1.89 0.02 26.00 2.80 1.89 0.00 28.00 2.80 1.89 0.00 30.00 2.80 1.89 0.00 32.00 2.80 1.89 0.00 34.00 2.80 1.89 0.00 36.00 2.80 1.89 0.00 38.00 2.80 1.89 0.00 40.00 2.80 1.89 0.00 42.00 2.80 1.89 0.00 44.00 2.80 1.89 0.00 46.00 2.80 1.89 0.00 48.00 2.80 1.89 0.00 50.00 2.80 1.89 0.00 52.00 2.80 1.89 0.00 54.00 2.80 1.89 0.00 56.00 2.80 1.89 0.00 58.00 2.80 1.89 0.00 60.00 2.80 1.89 0.00 62.00 2.80 1.89 0.00 64.00 2.80 1.89 0.00 66.00 2.80 1.89 0.00 68.00 2.80 1.89 0.00 70.00 2.80 1.89 0.00 72.00 2.80 1.89 0.00 74.00 2.80 1.89 0.00 76.00 2.80 1.89 0.00 78.00 2.80 1.89 0.00 80.00 2.80 1.89 0.00 82.00 2.80 1.89 0.00 84.00 2.80 1.89 0.00 86.00 2.80 1.89 0.00 88.00 2.80 1.89 0.00 90.00 2.80 1.89 0.00 92.00 2.80 1.89 0.00 94.00 2.80 1.89 0.00 96.00 2.80 1.89 0.00 98.00 2.80 1.89 0.00 100.00 2.80 1.89 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 2.80 1.89 0.00 104.00 2.80 1.89 0.00 106.00 2.80 1.89 0.00 108.00 2.80 1.89 0.00 110.00 2.80 1.89 0.00 112.00 2.80 1.89 0.00 114.00 2.80 1.89 0.00 116.00 2.80 1.89 0.00 118.00 2.80 1.89 0.00 120.00 2.80 1.89 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 35HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Link 15L: Proposed Treatment Inflow Area = 2.600 ac, 76.92% Impervious, Inflow Depth = 0.48" for 2-yr event Inflow = 0.74 cfs @ 12.57 hrs, Volume= 0.103 af Primary = 0.74 cfs @ 12.57 hrs, Volume= 0.103 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Link 15L: Proposed Treatment Inflow Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 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=2.600 ac 0.74 cfs 0.74 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 2-yr Rainfall=2.80"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 36HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Link 15L: Proposed Treatment Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 0.00 0.00 2.00 0.00 0.00 0.00 4.00 0.00 0.00 0.00 6.00 0.00 0.00 0.00 8.00 0.00 0.00 0.00 10.00 0.00 0.00 0.00 12.00 0.00 0.00 0.00 14.00 0.25 0.00 0.25 16.00 0.07 0.00 0.07 18.00 0.02 0.00 0.02 20.00 0.00 0.00 0.00 22.00 0.00 0.00 0.00 24.00 0.00 0.00 0.00 26.00 0.00 0.00 0.00 28.00 0.00 0.00 0.00 30.00 0.00 0.00 0.00 32.00 0.00 0.00 0.00 34.00 0.00 0.00 0.00 36.00 0.00 0.00 0.00 38.00 0.00 0.00 0.00 40.00 0.00 0.00 0.00 42.00 0.00 0.00 0.00 44.00 0.00 0.00 0.00 46.00 0.00 0.00 0.00 48.00 0.00 0.00 0.00 50.00 0.00 0.00 0.00 52.00 0.00 0.00 0.00 54.00 0.00 0.00 0.00 56.00 0.00 0.00 0.00 58.00 0.00 0.00 0.00 60.00 0.00 0.00 0.00 62.00 0.00 0.00 0.00 64.00 0.00 0.00 0.00 66.00 0.00 0.00 0.00 68.00 0.00 0.00 0.00 70.00 0.00 0.00 0.00 72.00 0.00 0.00 0.00 74.00 0.00 0.00 0.00 76.00 0.00 0.00 0.00 78.00 0.00 0.00 0.00 80.00 0.00 0.00 0.00 82.00 0.00 0.00 0.00 84.00 0.00 0.00 0.00 86.00 0.00 0.00 0.00 88.00 0.00 0.00 0.00 90.00 0.00 0.00 0.00 92.00 0.00 0.00 0.00 94.00 0.00 0.00 0.00 96.00 0.00 0.00 0.00 98.00 0.00 0.00 0.00 100.00 0.00 0.00 0.00 Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 102.00 0.00 0.00 0.00 104.00 0.00 0.00 0.00 106.00 0.00 0.00 0.00 108.00 0.00 0.00 0.00 110.00 0.00 0.00 0.00 112.00 0.00 0.00 0.00 114.00 0.00 0.00 0.00 116.00 0.00 0.00 0.00 118.00 0.00 0.00 0.00 120.00 0.00 0.00 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 37HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: POND SURFACE AREA Runoff = 8.41 cfs @ 11.99 hrs, Volume= 0.416 af, Depth= 4.20" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 10-yr Rainfall=4.20" Area (ac) CN Description * 1.190 100 1.190 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.3 255 12.70 Lake or Reservoir, POND Mean Depth= 5.01' Subcatchment 3S: POND SURFACE AREA Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 9 8 7 6 5 4 3 2 1 0 Atlas 14 24-hr S0 10-yr Rainfall=4.20" Runoff Area=1.190 ac Runoff Volume=0.416 af Runoff Depth=4.20" Flow Length=255' Tc=0.3 min CN=100 8.41 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 38HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 3S: POND SURFACE AREA Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.04 0.03 4.00 0.10 0.10 0.03 6.00 0.16 0.16 0.05 8.00 0.30 0.30 0.10 10.00 0.55 0.55 0.21 12.00 2.36 2.36 7.92 14.00 3.66 3.66 0.21 16.00 3.90 3.90 0.10 18.00 4.04 4.04 0.07 20.00 4.10 4.10 0.03 22.00 4.16 4.16 0.03 24.00 4.20 4.20 0.02 26.00 4.20 4.20 0.00 28.00 4.20 4.20 0.00 30.00 4.20 4.20 0.00 32.00 4.20 4.20 0.00 34.00 4.20 4.20 0.00 36.00 4.20 4.20 0.00 38.00 4.20 4.20 0.00 40.00 4.20 4.20 0.00 42.00 4.20 4.20 0.00 44.00 4.20 4.20 0.00 46.00 4.20 4.20 0.00 48.00 4.20 4.20 0.00 50.00 4.20 4.20 0.00 52.00 4.20 4.20 0.00 54.00 4.20 4.20 0.00 56.00 4.20 4.20 0.00 58.00 4.20 4.20 0.00 60.00 4.20 4.20 0.00 62.00 4.20 4.20 0.00 64.00 4.20 4.20 0.00 66.00 4.20 4.20 0.00 68.00 4.20 4.20 0.00 70.00 4.20 4.20 0.00 72.00 4.20 4.20 0.00 74.00 4.20 4.20 0.00 76.00 4.20 4.20 0.00 78.00 4.20 4.20 0.00 80.00 4.20 4.20 0.00 82.00 4.20 4.20 0.00 84.00 4.20 4.20 0.00 86.00 4.20 4.20 0.00 88.00 4.20 4.20 0.00 90.00 4.20 4.20 0.00 92.00 4.20 4.20 0.00 94.00 4.20 4.20 0.00 96.00 4.20 4.20 0.00 98.00 4.20 4.20 0.00 100.00 4.20 4.20 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 4.20 4.20 0.00 104.00 4.20 4.20 0.00 106.00 4.20 4.20 0.00 108.00 4.20 4.20 0.00 110.00 4.20 4.20 0.00 112.00 4.20 4.20 0.00 114.00 4.20 4.20 0.00 116.00 4.20 4.20 0.00 118.00 4.20 4.20 0.00 120.00 4.20 4.20 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 39HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: POND INFLOW Runoff = 49.49 cfs @ 12.15 hrs, Volume= 3.264 af, Depth= 2.29" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 10-yr Rainfall=4.20" Area (ac) CN Description * 9.450 98 3.130 61 >75% Grass cover, Good, HSG B (UNGRADED) 4.520 58 Meadow, non-grazed, HSG B (UNGRADED) 17.100 81 Weighted Average 7.650 44.74% Pervious Area 9.450 55.26% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 11.5 123 0.0610 0.18 Sheet Flow, GRASS Grass: Dense n= 0.240 P2= 2.80" 0.8 61 0.0260 1.29 Sheet Flow, CURB Smooth surfaces n= 0.011 P2= 2.80" 1.3 875 0.0375 11.51 20.34 Pipe Channel, RCP 18.0" Round Area= 1.8 sf Perim= 4.7' r= 0.38' n= 0.013 Concrete pipe, straight & clean 13.6 1,059 Total Subcatchment 4S: POND INFLOW Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 55 50 45 40 35 30 25 20 15 10 5 0 Atlas 14 24-hr S0 10-yr Rainfall=4.20" Runoff Area=17.100 ac Runoff Volume=3.264 af Runoff Depth=2.29" Flow Length=1,059' Tc=13.6 min CN=81 49.49 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 40HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 4S: POND INFLOW Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.00 0.00 4.00 0.10 0.00 0.00 6.00 0.16 0.00 0.00 8.00 0.30 0.00 0.00 10.00 0.55 0.00 0.10 12.00 2.36 0.84 21.29 14.00 3.66 1.84 2.63 16.00 3.90 2.04 1.26 18.00 4.04 2.15 0.90 20.00 4.10 2.21 0.43 22.00 4.16 2.25 0.35 24.00 4.20 2.29 0.30 26.00 4.20 2.29 0.00 28.00 4.20 2.29 0.00 30.00 4.20 2.29 0.00 32.00 4.20 2.29 0.00 34.00 4.20 2.29 0.00 36.00 4.20 2.29 0.00 38.00 4.20 2.29 0.00 40.00 4.20 2.29 0.00 42.00 4.20 2.29 0.00 44.00 4.20 2.29 0.00 46.00 4.20 2.29 0.00 48.00 4.20 2.29 0.00 50.00 4.20 2.29 0.00 52.00 4.20 2.29 0.00 54.00 4.20 2.29 0.00 56.00 4.20 2.29 0.00 58.00 4.20 2.29 0.00 60.00 4.20 2.29 0.00 62.00 4.20 2.29 0.00 64.00 4.20 2.29 0.00 66.00 4.20 2.29 0.00 68.00 4.20 2.29 0.00 70.00 4.20 2.29 0.00 72.00 4.20 2.29 0.00 74.00 4.20 2.29 0.00 76.00 4.20 2.29 0.00 78.00 4.20 2.29 0.00 80.00 4.20 2.29 0.00 82.00 4.20 2.29 0.00 84.00 4.20 2.29 0.00 86.00 4.20 2.29 0.00 88.00 4.20 2.29 0.00 90.00 4.20 2.29 0.00 92.00 4.20 2.29 0.00 94.00 4.20 2.29 0.00 96.00 4.20 2.29 0.00 98.00 4.20 2.29 0.00 100.00 4.20 2.29 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 4.20 2.29 0.00 104.00 4.20 2.29 0.00 106.00 4.20 2.29 0.00 108.00 4.20 2.29 0.00 110.00 4.20 2.29 0.00 112.00 4.20 2.29 0.00 114.00 4.20 2.29 0.00 116.00 4.20 2.29 0.00 118.00 4.20 2.29 0.00 120.00 4.20 2.29 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 41HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: WETLAND INFLOW(1) Runoff = 3.04 cfs @ 12.38 hrs, Volume= 0.341 af, Depth= 0.76" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 10-yr Rainfall=4.20" Area (ac) CN Description 5.400 58 Meadow, non-grazed, HSG B 5.400 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 21.1 300 0.0800 0.24 Sheet Flow, GRASS Grass: Dense n= 0.240 P2= 2.80" 3.4 569 0.0343 2.78 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 24.5 869 Total Subcatchment 5S: WETLAND INFLOW(1) Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 3 2 1 0 Atlas 14 24-hr S0 10-yr Rainfall=4.20" Runoff Area=5.400 ac Runoff Volume=0.341 af Runoff Depth=0.76" Flow Length=869' Tc=24.5 min CN=58 3.04 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 42HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 5S: WETLAND INFLOW(1) Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.00 0.00 4.00 0.10 0.00 0.00 6.00 0.16 0.00 0.00 8.00 0.30 0.00 0.00 10.00 0.55 0.00 0.00 12.00 2.36 0.10 0.08 14.00 3.66 0.52 0.47 16.00 3.90 0.62 0.22 18.00 4.04 0.68 0.16 20.00 4.10 0.71 0.08 22.00 4.16 0.74 0.06 24.00 4.20 0.76 0.05 26.00 4.20 0.76 0.00 28.00 4.20 0.76 0.00 30.00 4.20 0.76 0.00 32.00 4.20 0.76 0.00 34.00 4.20 0.76 0.00 36.00 4.20 0.76 0.00 38.00 4.20 0.76 0.00 40.00 4.20 0.76 0.00 42.00 4.20 0.76 0.00 44.00 4.20 0.76 0.00 46.00 4.20 0.76 0.00 48.00 4.20 0.76 0.00 50.00 4.20 0.76 0.00 52.00 4.20 0.76 0.00 54.00 4.20 0.76 0.00 56.00 4.20 0.76 0.00 58.00 4.20 0.76 0.00 60.00 4.20 0.76 0.00 62.00 4.20 0.76 0.00 64.00 4.20 0.76 0.00 66.00 4.20 0.76 0.00 68.00 4.20 0.76 0.00 70.00 4.20 0.76 0.00 72.00 4.20 0.76 0.00 74.00 4.20 0.76 0.00 76.00 4.20 0.76 0.00 78.00 4.20 0.76 0.00 80.00 4.20 0.76 0.00 82.00 4.20 0.76 0.00 84.00 4.20 0.76 0.00 86.00 4.20 0.76 0.00 88.00 4.20 0.76 0.00 90.00 4.20 0.76 0.00 92.00 4.20 0.76 0.00 94.00 4.20 0.76 0.00 96.00 4.20 0.76 0.00 98.00 4.20 0.76 0.00 100.00 4.20 0.76 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 4.20 0.76 0.00 104.00 4.20 0.76 0.00 106.00 4.20 0.76 0.00 108.00 4.20 0.76 0.00 110.00 4.20 0.76 0.00 112.00 4.20 0.76 0.00 114.00 4.20 0.76 0.00 116.00 4.20 0.76 0.00 118.00 4.20 0.76 0.00 120.00 4.20 0.76 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 43HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: WETLAND INFLOW(2) Runoff = 2.27 cfs @ 12.36 hrs, Volume= 0.246 af, Depth= 0.81" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 10-yr Rainfall=4.20" Area (ac) CN Description 3.010 58 Meadow, non-grazed, HSG B 0.640 61 >75% Grass cover, Good, HSG B 3.650 59 Weighted Average 3.650 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 23.7 300 0.0600 0.21 Sheet Flow, GRASS Grass: Dense n= 0.240 P2= 2.80" 0.3 89 0.1350 5.51 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 24.0 389 Total Subcatchment 6S: WETLAND INFLOW(2) Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 2 1 0 Atlas 14 24-hr S0 10-yr Rainfall=4.20" Runoff Area=3.650 ac Runoff Volume=0.246 af Runoff Depth=0.81" Flow Length=389' Tc=24.0 min CN=59 2.27 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 44HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: WETLAND INFLOW(2) Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.00 0.00 4.00 0.10 0.00 0.00 6.00 0.16 0.00 0.00 8.00 0.30 0.00 0.00 10.00 0.55 0.00 0.00 12.00 2.36 0.12 0.08 14.00 3.66 0.56 0.33 16.00 3.90 0.67 0.15 18.00 4.04 0.73 0.11 20.00 4.10 0.76 0.05 22.00 4.16 0.79 0.04 24.00 4.20 0.81 0.04 26.00 4.20 0.81 0.00 28.00 4.20 0.81 0.00 30.00 4.20 0.81 0.00 32.00 4.20 0.81 0.00 34.00 4.20 0.81 0.00 36.00 4.20 0.81 0.00 38.00 4.20 0.81 0.00 40.00 4.20 0.81 0.00 42.00 4.20 0.81 0.00 44.00 4.20 0.81 0.00 46.00 4.20 0.81 0.00 48.00 4.20 0.81 0.00 50.00 4.20 0.81 0.00 52.00 4.20 0.81 0.00 54.00 4.20 0.81 0.00 56.00 4.20 0.81 0.00 58.00 4.20 0.81 0.00 60.00 4.20 0.81 0.00 62.00 4.20 0.81 0.00 64.00 4.20 0.81 0.00 66.00 4.20 0.81 0.00 68.00 4.20 0.81 0.00 70.00 4.20 0.81 0.00 72.00 4.20 0.81 0.00 74.00 4.20 0.81 0.00 76.00 4.20 0.81 0.00 78.00 4.20 0.81 0.00 80.00 4.20 0.81 0.00 82.00 4.20 0.81 0.00 84.00 4.20 0.81 0.00 86.00 4.20 0.81 0.00 88.00 4.20 0.81 0.00 90.00 4.20 0.81 0.00 92.00 4.20 0.81 0.00 94.00 4.20 0.81 0.00 96.00 4.20 0.81 0.00 98.00 4.20 0.81 0.00 100.00 4.20 0.81 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 4.20 0.81 0.00 104.00 4.20 0.81 0.00 106.00 4.20 0.81 0.00 108.00 4.20 0.81 0.00 110.00 4.20 0.81 0.00 112.00 4.20 0.81 0.00 114.00 4.20 0.81 0.00 116.00 4.20 0.81 0.00 118.00 4.20 0.81 0.00 120.00 4.20 0.81 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 45HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Pond 7P: POND Inflow Area = 20.890 ac, 60.51% Impervious, Inflow Depth = 2.33" for 10-yr event Inflow = 54.87 cfs @ 12.16 hrs, Volume= 4.056 af Outflow = 12.14 cfs @ 12.74 hrs, Volume= 4.020 af, Atten= 78%, Lag= 34.7 min Primary = 12.14 cfs @ 12.74 hrs, Volume= 4.020 af Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs / 2 Starting Elev= 906.00' Surf.Area= 51,912 sf Storage= 256,706 cf Peak Elev= 907.68' @ 12.74 hrs Surf.Area= 59,748 sf Storage= 350,362 cf (93,655 cf above start) Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= 426.5 min ( 1,219.7 - 793.3 ) Volume Invert Avail.Storage Storage Description #1 897.00' 499,920 cf Custom Stage Data (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 897.00 0 0.0 0 0 0 898.00 17,063 702.0 5,688 5,688 39,218 900.00 23,171 823.0 40,079 45,766 53,981 902.00 30,413 919.3 53,420 99,186 67,446 904.00 37,850 1,008.5 68,128 167,314 81,265 906.00 51,912 1,152.3 89,393 256,706 106,086 908.00 61,309 1,206.3 113,091 369,797 116,492 908.50 63,774 1,214.0 31,269 401,066 118,094 909.00 66,330 1,235.0 32,524 433,590 122,232 910.00 66,330 1,235.0 66,330 499,920 123,467 Device Routing Invert Outlet Devices #1 Secondary 910.50'120.0" W x 6.0" H Box RIP RAP OVERFLOW L= 25.0' Ke= 1.000 Inlet / Outlet Invert= 910.50' / 905.30' S= 0.2080 '/' Cc= 0.900 n= 0.035, Flow Area= 5.00 sf #2 Primary 905.20'27.0" Round OUTLET PIPE L= 30.0' RCP, mitered to conform to fill, Ke= 0.700 Inlet / Outlet Invert= 905.20' / 904.50' S= 0.0233 '/' Cc= 0.900 n= 0.013 Concrete pipe, straight & clean, Flow Area= 3.98 sf #3 Device 2 906.00'5' SLOTTED WIER, Cv= 2.62 (C= 3.28) Head (feet) 0.00 1.00 1.00 2.50 2.50 Width (feet) 0.40 0.75 5.00 5.00 0.00 #4 Device 3 902.00'27.0" Round INLET PIPE L= 32.0' CMP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 901.00' / 902.00' S= -0.0313 '/' Cc= 0.900 n= 0.030 Corrugated metal, Flow Area= 3.98 sf #5 Device 2 908.50'5.0" Horiz. Top Grate C= 0.600 Limited to weir flow at low heads #6 Secondary 908.50'Overland Overflow, Cv= 2.62 (C= 3.28) Head (feet) 0.00 0.50 0.50 1.00 Width (feet) 10.00 12.00 100.00 100.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 46HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Primary OutFlow Max=12.14 cfs @ 12.74 hrs HW=907.68' TW=0.00' (Dynamic Tailwater) 2=OUTLET PIPE (Passes 12.14 cfs of 19.66 cfs potential flow) 3=5' SLOTTED WIER (Weir Controls 12.14 cfs @ 3.06 fps) 4=INLET PIPE (Passes 12.14 cfs of 19.58 cfs potential flow) 5=Top Grate ( Controls 0.00 cfs) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=906.00' TW=0.00' (Dynamic Tailwater) 1=RIP RAP OVERFLOW ( Controls 0.00 cfs) 6=Overland Overflow ( Controls 0.00 cfs) Pond 7P: POND Inflow Outflow Primary Secondary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 60 55 50 45 40 35 30 25 20 15 10 5 0 Inflow Area=20.890 ac Peak Elev=907.68' Storage=350,362 cf 54.87 cfs 12.14 cfs 12.14 cfs 0.00 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 47HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Pond 7P: POND Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Primary (cfs) Secondary (cfs) 0.00 0.00 256,707 906.00 0.00 0.00 0.00 5.00 0.04 257,244 906.01 0.00 0.00 0.00 10.00 0.30 259,020 906.04 0.01 0.01 0.00 15.00 2.31 324,866 907.24 4.28 4.28 0.00 20.00 0.47 304,179 906.88 1.42 1.42 0.00 25.00 0.00 290,423 906.63 0.80 0.80 0.00 30.00 0.00 279,759 906.44 0.43 0.43 0.00 35.00 0.00 273,632 906.32 0.27 0.27 0.00 40.00 0.00 269,732 906.25 0.18 0.18 0.00 45.00 0.00 267,075 906.20 0.12 0.12 0.00 50.00 0.00 265,173 906.16 0.09 0.09 0.00 55.00 0.00 263,760 906.14 0.07 0.07 0.00 60.00 0.00 262,680 906.11 0.05 0.05 0.00 65.00 0.00 261,833 906.10 0.04 0.04 0.00 70.00 0.00 261,158 906.09 0.03 0.03 0.00 75.00 0.00 260,609 906.07 0.03 0.03 0.00 80.00 0.00 260,157 906.07 0.02 0.02 0.00 85.00 0.00 259,779 906.06 0.02 0.02 0.00 90.00 0.00 259,461 906.05 0.02 0.02 0.00 95.00 0.00 259,190 906.05 0.01 0.01 0.00 100.00 0.00 258,958 906.04 0.01 0.01 0.00 105.00 0.00 258,757 906.04 0.01 0.01 0.00 110.00 0.00 258,581 906.04 0.01 0.01 0.00 115.00 0.00 258,428 906.03 0.01 0.01 0.00 120.00 0.00 258,292 906.03 0.01 0.01 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 48HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 7S: DA:P3 Runoff = 2.58 cfs @ 12.08 hrs, Volume= 0.165 af, Depth= 3.96" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 10-yr Rainfall=4.20" Area (ac) CN Description * 0.500 98 0.500 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 7S: DA:P3 Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 2 1 0 Atlas 14 24-hr S0 10-yr Rainfall=4.20" Runoff Area=0.500 ac Runoff Volume=0.165 af Runoff Depth=3.96" Tc=10.0 min CN=98 2.58 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 49HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 7S: DA:P3 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.00 0.00 4.00 0.10 0.01 0.01 6.00 0.16 0.04 0.01 8.00 0.30 0.15 0.03 10.00 0.55 0.36 0.08 12.00 2.36 2.13 1.61 14.00 3.66 3.43 0.09 16.00 3.90 3.66 0.04 18.00 4.04 3.80 0.03 20.00 4.10 3.87 0.01 22.00 4.16 3.92 0.01 24.00 4.20 3.96 0.01 26.00 4.20 3.96 0.00 28.00 4.20 3.96 0.00 30.00 4.20 3.96 0.00 32.00 4.20 3.96 0.00 34.00 4.20 3.96 0.00 36.00 4.20 3.96 0.00 38.00 4.20 3.96 0.00 40.00 4.20 3.96 0.00 42.00 4.20 3.96 0.00 44.00 4.20 3.96 0.00 46.00 4.20 3.96 0.00 48.00 4.20 3.96 0.00 50.00 4.20 3.96 0.00 52.00 4.20 3.96 0.00 54.00 4.20 3.96 0.00 56.00 4.20 3.96 0.00 58.00 4.20 3.96 0.00 60.00 4.20 3.96 0.00 62.00 4.20 3.96 0.00 64.00 4.20 3.96 0.00 66.00 4.20 3.96 0.00 68.00 4.20 3.96 0.00 70.00 4.20 3.96 0.00 72.00 4.20 3.96 0.00 74.00 4.20 3.96 0.00 76.00 4.20 3.96 0.00 78.00 4.20 3.96 0.00 80.00 4.20 3.96 0.00 82.00 4.20 3.96 0.00 84.00 4.20 3.96 0.00 86.00 4.20 3.96 0.00 88.00 4.20 3.96 0.00 90.00 4.20 3.96 0.00 92.00 4.20 3.96 0.00 94.00 4.20 3.96 0.00 96.00 4.20 3.96 0.00 98.00 4.20 3.96 0.00 100.00 4.20 3.96 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 4.20 3.96 0.00 104.00 4.20 3.96 0.00 106.00 4.20 3.96 0.00 108.00 4.20 3.96 0.00 110.00 4.20 3.96 0.00 112.00 4.20 3.96 0.00 114.00 4.20 3.96 0.00 116.00 4.20 3.96 0.00 118.00 4.20 3.96 0.00 120.00 4.20 3.96 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 50HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Link 8L: WETLAND Inflow Area = 29.940 ac, 42.22% Impervious, Inflow Depth > 1.85" for 10-yr event Inflow = 15.71 cfs @ 12.60 hrs, Volume= 4.607 af Primary = 15.71 cfs @ 12.60 hrs, Volume= 4.607 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Link 8L: WETLAND Inflow Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=29.940 ac 15.71 cfs 15.71 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 51HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Link 8L: WETLAND Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 0.00 0.00 2.00 0.00 0.00 0.00 4.00 0.00 0.00 0.00 6.00 0.00 0.00 0.00 8.00 0.01 0.00 0.01 10.00 0.01 0.00 0.01 12.00 0.73 0.00 0.73 14.00 7.69 0.00 7.69 16.00 3.28 0.00 3.28 18.00 2.08 0.00 2.08 20.00 1.54 0.00 1.54 22.00 1.23 0.00 1.23 24.00 1.01 0.00 1.01 26.00 0.70 0.00 0.70 28.00 0.55 0.00 0.55 30.00 0.43 0.00 0.43 32.00 0.35 0.00 0.35 34.00 0.29 0.00 0.29 36.00 0.24 0.00 0.24 38.00 0.21 0.00 0.21 40.00 0.18 0.00 0.18 42.00 0.15 0.00 0.15 44.00 0.13 0.00 0.13 46.00 0.12 0.00 0.12 48.00 0.10 0.00 0.10 50.00 0.09 0.00 0.09 52.00 0.08 0.00 0.08 54.00 0.07 0.00 0.07 56.00 0.06 0.00 0.06 58.00 0.06 0.00 0.06 60.00 0.05 0.00 0.05 62.00 0.05 0.00 0.05 64.00 0.04 0.00 0.04 66.00 0.04 0.00 0.04 68.00 0.04 0.00 0.04 70.00 0.03 0.00 0.03 72.00 0.03 0.00 0.03 74.00 0.03 0.00 0.03 76.00 0.03 0.00 0.03 78.00 0.02 0.00 0.02 80.00 0.02 0.00 0.02 82.00 0.02 0.00 0.02 84.00 0.02 0.00 0.02 86.00 0.02 0.00 0.02 88.00 0.02 0.00 0.02 90.00 0.02 0.00 0.02 92.00 0.02 0.00 0.02 94.00 0.01 0.00 0.01 96.00 0.01 0.00 0.01 98.00 0.01 0.00 0.01 100.00 0.01 0.00 0.01 Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 102.00 0.01 0.00 0.01 104.00 0.01 0.00 0.01 106.00 0.01 0.00 0.01 108.00 0.01 0.00 0.01 110.00 0.01 0.00 0.01 112.00 0.01 0.00 0.01 114.00 0.01 0.00 0.01 116.00 0.01 0.00 0.01 118.00 0.01 0.00 0.01 120.00 0.01 0.00 0.01 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 52HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 9S: DA:P2 Runoff = 3.54 cfs @ 12.16 hrs, Volume= 0.242 af, Depth= 2.64" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 10-yr Rainfall=4.20" Area (ac) CN Description * 0.700 98 0.400 61 >75% Grass cover, Good, HSG B 1.100 85 Weighted Average 0.400 36.36% Pervious Area 0.700 63.64% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 Direct Entry, Subcatchment 9S: DA:P2 Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 3 2 1 0 Atlas 14 24-hr S0 10-yr Rainfall=4.20" Runoff Area=1.100 ac Runoff Volume=0.242 af Runoff Depth=2.64" Tc=15.0 min CN=85 3.54 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 53HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 9S: DA:P2 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.00 0.00 4.00 0.10 0.00 0.00 6.00 0.16 0.00 0.00 8.00 0.30 0.00 0.00 10.00 0.55 0.02 0.03 12.00 2.36 1.07 1.48 14.00 3.66 2.16 0.18 16.00 3.90 2.37 0.09 18.00 4.04 2.49 0.06 20.00 4.10 2.55 0.03 22.00 4.16 2.60 0.02 24.00 4.20 2.64 0.02 26.00 4.20 2.64 0.00 28.00 4.20 2.64 0.00 30.00 4.20 2.64 0.00 32.00 4.20 2.64 0.00 34.00 4.20 2.64 0.00 36.00 4.20 2.64 0.00 38.00 4.20 2.64 0.00 40.00 4.20 2.64 0.00 42.00 4.20 2.64 0.00 44.00 4.20 2.64 0.00 46.00 4.20 2.64 0.00 48.00 4.20 2.64 0.00 50.00 4.20 2.64 0.00 52.00 4.20 2.64 0.00 54.00 4.20 2.64 0.00 56.00 4.20 2.64 0.00 58.00 4.20 2.64 0.00 60.00 4.20 2.64 0.00 62.00 4.20 2.64 0.00 64.00 4.20 2.64 0.00 66.00 4.20 2.64 0.00 68.00 4.20 2.64 0.00 70.00 4.20 2.64 0.00 72.00 4.20 2.64 0.00 74.00 4.20 2.64 0.00 76.00 4.20 2.64 0.00 78.00 4.20 2.64 0.00 80.00 4.20 2.64 0.00 82.00 4.20 2.64 0.00 84.00 4.20 2.64 0.00 86.00 4.20 2.64 0.00 88.00 4.20 2.64 0.00 90.00 4.20 2.64 0.00 92.00 4.20 2.64 0.00 94.00 4.20 2.64 0.00 96.00 4.20 2.64 0.00 98.00 4.20 2.64 0.00 100.00 4.20 2.64 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 4.20 2.64 0.00 104.00 4.20 2.64 0.00 106.00 4.20 2.64 0.00 108.00 4.20 2.64 0.00 110.00 4.20 2.64 0.00 112.00 4.20 2.64 0.00 114.00 4.20 2.64 0.00 116.00 4.20 2.64 0.00 118.00 4.20 2.64 0.00 120.00 4.20 2.64 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 54HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Pond 11P: Middle Chambers Inflow Area = 1.100 ac, 63.64% Impervious, Inflow Depth = 2.64" for 10-yr event Inflow = 3.54 cfs @ 12.16 hrs, Volume= 0.242 af Outflow = 2.10 cfs @ 12.36 hrs, Volume= 0.242 af, Atten= 41%, Lag= 11.6 min Discarded = 0.03 cfs @ 12.36 hrs, Volume= 0.109 af Primary = 2.06 cfs @ 12.36 hrs, Volume= 0.133 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 946.99' @ 12.36 hrs Surf.Area= 4,228 sf Storage= 4,117 cf Plug-Flow detention time= 478.9 min calculated for 0.242 af (100% of inflow) Center-of-Mass det. time= 479.0 min ( 1,275.2 - 796.1 ) Volume Invert Avail.Storage Storage Description #1A 945.50' 2,992 cf 56.75'W x 74.50'L x 2.54'H Field A 10,746 cf Overall - 3,265 cf Embedded = 7,481 cf x 40.0% Voids #2A 946.00' 3,265 cf Cultec R-150XLHD x 119 Inside #1 Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 17 rows 6,257 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 946.00'15.0" Round EX. 15" RCP L= 20.0' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 946.00' / 945.90' S= 0.0050 '/' Cc= 0.900 n= 0.013 Concrete pipe, straight & clean, Flow Area= 1.23 sf #2 Device 1 946.70'Weir Wall, Cv= 2.62 (C= 3.28) Head (feet) 0.00 1.00 1.00 2.30 Width (feet) 4.00 4.00 4.00 4.00 #3 Discarded 945.50'0.300 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.03 cfs @ 12.36 hrs HW=946.99' (Free Discharge) 3=Exfiltration (Exfiltration Controls 0.03 cfs) Primary OutFlow Max=2.06 cfs @ 12.36 hrs HW=946.99' TW=0.00' (Dynamic Tailwater) 1=EX. 15" RCP (Passes 2.06 cfs of 2.93 cfs potential flow) 2=Weir Wall (Weir Controls 2.06 cfs @ 1.77 fps) PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 55HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 11P: Middle Chambers - Chamber Wizard Field A Chamber Model = Cultec R-150XLHD (Cultec Recharger® 150XLHD) Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 17 rows 33.0" Wide + 6.0" Spacing = 39.0" C-C Row Spacing 7 Chambers/Row x 10.25' Long +0.75' Row Adjustment = 72.50' Row Length +12.0" End Stone x 2 = 74.50' Base Length 17 Rows x 33.0" Wide + 6.0" Spacing x 16 + 12.0" Side Stone x 2 = 56.75' Base Width 6.0" Base + 18.5" Chamber Height + 6.0" Cover = 2.54' Field Height 119 Chambers x 27.2 cf +0.75' Row Adjustment x 2.65 sf x 17 Rows = 3,264.9 cf Chamber Storage 10,745.8 cf Field - 3,264.9 cf Chambers = 7,481.0 cf Stone x 40.0% Voids = 2,992.4 cf Stone Storage Chamber Storage + Stone Storage = 6,257.3 cf = 0.144 af Overall Storage Efficiency = 58.2% 119 Chambers 398.0 cy Field 277.1 cy Stone PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 56HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 11P: Middle Chambers Inflow Outflow Discarded Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 3 2 1 0 Inflow Area=1.100 ac Peak Elev=946.99' Storage=4,117 cf 3.54 cfs 2.10 cfs 0.03 cfs 2.06 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 57HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Pond 11P: Middle Chambers Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Discarded (cfs) Primary (cfs) 0.00 0.00 0 945.50 0.00 0.00 0.00 5.00 0.00 0 945.50 0.00 0.00 0.00 10.00 0.03 13 945.51 0.02 0.02 0.00 15.00 0.13 3,345 946.74 0.14 0.03 0.11 20.00 0.03 3,221 946.70 0.03 0.03 0.00 25.00 0.00 3,020 946.64 0.03 0.03 0.00 30.00 0.00 2,457 946.47 0.03 0.03 0.00 35.00 0.00 1,900 946.31 0.03 0.03 0.00 40.00 0.00 1,347 946.14 0.03 0.03 0.00 45.00 0.00 800 945.97 0.03 0.03 0.00 50.00 0.00 262 945.65 0.03 0.03 0.00 55.00 0.00 0 945.50 0.00 0.00 0.00 60.00 0.00 0 945.50 0.00 0.00 0.00 65.00 0.00 0 945.50 0.00 0.00 0.00 70.00 0.00 0 945.50 0.00 0.00 0.00 75.00 0.00 0 945.50 0.00 0.00 0.00 80.00 0.00 0 945.50 0.00 0.00 0.00 85.00 0.00 0 945.50 0.00 0.00 0.00 90.00 0.00 0 945.50 0.00 0.00 0.00 95.00 0.00 0 945.50 0.00 0.00 0.00 100.00 0.00 0 945.50 0.00 0.00 0.00 105.00 0.00 0 945.50 0.00 0.00 0.00 110.00 0.00 0 945.50 0.00 0.00 0.00 115.00 0.00 0 945.50 0.00 0.00 0.00 120.00 0.00 0 945.50 0.00 0.00 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 58HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Pond 12P: South Chambers Inflow Area = 0.500 ac,100.00% Impervious, Inflow Depth = 3.96" for 10-yr event Inflow = 2.58 cfs @ 12.08 hrs, Volume= 0.165 af Outflow = 1.31 cfs @ 12.26 hrs, Volume= 0.165 af, Atten= 49%, Lag= 10.6 min Discarded = 0.02 cfs @ 12.26 hrs, Volume= 0.072 af Primary = 1.29 cfs @ 12.26 hrs, Volume= 0.093 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 939.05' @ 12.26 hrs Surf.Area= 2,533 sf Storage= 3,233 cf Plug-Flow detention time= 430.5 min calculated for 0.165 af (100% of inflow) Center-of-Mass det. time= 430.5 min ( 1,179.5 - 749.0 ) Volume Invert Avail.Storage Storage Description #1A 937.00' 1,807 cf 34.00'W x 74.50'L x 2.54'H Field A 6,438 cf Overall - 1,921 cf Embedded = 4,518 cf x 40.0% Voids #2A 937.50' 1,921 cf Cultec R-150XLHD x 70 Inside #1 Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 10 rows 3,728 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 937.50'15.0" Round 15" RCP L= 20.0' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 937.50' / 937.40' S= 0.0050 '/' Cc= 0.900 n= 0.013 Concrete pipe, straight & clean, Flow Area= 1.23 sf #2 Device 1 938.20'Weir Wall, Cv= 2.62 (C= 3.28) Head (feet) 0.00 1.00 1.00 1.30 Width (feet) 0.50 0.50 4.00 4.00 #3 Discarded 937.00'0.300 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.02 cfs @ 12.26 hrs HW=939.05' (Free Discharge) 3=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=1.29 cfs @ 12.26 hrs HW=939.05' TW=0.00' (Dynamic Tailwater) 1=15" RCP (Passes 1.29 cfs of 5.49 cfs potential flow) 2=Weir Wall (Weir Controls 1.29 cfs @ 3.03 fps) PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 59HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 12P: South Chambers - Chamber Wizard Field A Chamber Model = Cultec R-150XLHD (Cultec Recharger® 150XLHD) Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 10 rows 33.0" Wide + 6.0" Spacing = 39.0" C-C Row Spacing 7 Chambers/Row x 10.25' Long +0.75' Row Adjustment = 72.50' Row Length +12.0" End Stone x 2 = 74.50' Base Length 10 Rows x 33.0" Wide + 6.0" Spacing x 9 + 12.0" Side Stone x 2 = 34.00' Base Width 6.0" Base + 18.5" Chamber Height + 6.0" Cover = 2.54' Field Height 70 Chambers x 27.2 cf +0.75' Row Adjustment x 2.65 sf x 10 Rows = 1,920.5 cf Chamber Storage 6,438.0 cf Field - 1,920.5 cf Chambers = 4,517.5 cf Stone x 40.0% Voids = 1,807.0 cf Stone Storage Chamber Storage + Stone Storage = 3,727.5 cf = 0.086 af Overall Storage Efficiency = 57.9% 70 Chambers 238.4 cy Field 167.3 cy Stone PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 60HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 12P: South Chambers Inflow Outflow Discarded Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 2 1 0 Inflow Area=0.500 ac Peak Elev=939.05' Storage=3,233 cf 2.58 cfs 1.31 cfs 0.02 cfs 1.29 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 61HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Pond 12P: South Chambers Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Discarded (cfs) Primary (cfs) 0.00 0.00 0 937.00 0.00 0.00 0.00 5.00 0.01 4 937.00 0.01 0.01 0.00 10.00 0.08 293 937.29 0.02 0.02 0.00 15.00 0.07 2,133 938.32 0.08 0.02 0.07 20.00 0.01 1,934 938.21 0.02 0.02 0.00 25.00 0.00 1,764 938.12 0.02 0.02 0.00 30.00 0.00 1,419 937.95 0.02 0.02 0.00 35.00 0.00 1,079 937.78 0.02 0.02 0.00 40.00 0.00 744 937.61 0.02 0.02 0.00 45.00 0.00 413 937.41 0.02 0.02 0.00 50.00 0.00 90 937.09 0.02 0.02 0.00 55.00 0.00 0 937.00 0.00 0.00 0.00 60.00 0.00 0 937.00 0.00 0.00 0.00 65.00 0.00 0 937.00 0.00 0.00 0.00 70.00 0.00 0 937.00 0.00 0.00 0.00 75.00 0.00 0 937.00 0.00 0.00 0.00 80.00 0.00 0 937.00 0.00 0.00 0.00 85.00 0.00 0 937.00 0.00 0.00 0.00 90.00 0.00 0 937.00 0.00 0.00 0.00 95.00 0.00 0 937.00 0.00 0.00 0.00 100.00 0.00 0 937.00 0.00 0.00 0.00 105.00 0.00 0 937.00 0.00 0.00 0.00 110.00 0.00 0 937.00 0.00 0.00 0.00 115.00 0.00 0 937.00 0.00 0.00 0.00 120.00 0.00 0 937.00 0.00 0.00 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 62HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Pond 13P: North Chambers Inflow Area = 1.000 ac, 80.00% Impervious, Inflow Depth = 3.21" for 10-yr event Inflow = 4.54 cfs @ 12.09 hrs, Volume= 0.267 af Outflow = 2.81 cfs @ 12.22 hrs, Volume= 0.267 af, Atten= 38%, Lag= 8.2 min Discarded = 0.03 cfs @ 12.22 hrs, Volume= 0.118 af Primary = 2.78 cfs @ 12.22 hrs, Volume= 0.150 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 947.06' @ 12.22 hrs Surf.Area= 4,465 sf Storage= 4,545 cf Plug-Flow detention time= 454.7 min calculated for 0.267 af (100% of inflow) Center-of-Mass det. time= 454.9 min ( 1,232.2 - 777.3 ) Volume Invert Avail.Storage Storage Description #1A 945.50' 3,160 cf 47.00'W x 95.00'L x 2.54'H Field A 11,349 cf Overall - 3,449 cf Embedded = 7,900 cf x 40.0% Voids #2A 946.00' 3,449 cf Cultec R-150XLHD x 126 Inside #1 Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 14 rows 6,609 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 946.00'15.0" Round EX. 15" RCP L= 65.0' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 946.00' / 945.80' S= 0.0031 '/' Cc= 0.900 n= 0.013 Concrete pipe, straight & clean, Flow Area= 1.23 sf #2 Device 1 946.70'Weir Wall, Cv= 2.62 (C= 3.28) Head (feet) 0.00 1.00 2.00 2.30 Width (feet) 4.00 4.00 4.00 4.00 #3 Discarded 945.50'0.300 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.03 cfs @ 12.22 hrs HW=947.06' (Free Discharge) 3=Exfiltration (Exfiltration Controls 0.03 cfs) Primary OutFlow Max=2.78 cfs @ 12.22 hrs HW=947.06' TW=0.00' (Dynamic Tailwater) 1=EX. 15" RCP (Passes 2.78 cfs of 2.91 cfs potential flow) 2=Weir Wall (Weir Controls 2.78 cfs @ 1.95 fps) PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 63HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 13P: North Chambers - Chamber Wizard Field A Chamber Model = Cultec R-150XLHD (Cultec Recharger® 150XLHD) Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 14 rows 33.0" Wide + 6.0" Spacing = 39.0" C-C Row Spacing 9 Chambers/Row x 10.25' Long +0.75' Row Adjustment = 93.00' Row Length +12.0" End Stone x 2 = 95.00' Base Length 14 Rows x 33.0" Wide + 6.0" Spacing x 13 + 12.0" Side Stone x 2 = 47.00' Base Width 6.0" Base + 18.5" Chamber Height + 6.0" Cover = 2.54' Field Height 126 Chambers x 27.2 cf +0.75' Row Adjustment x 2.65 sf x 14 Rows = 3,449.0 cf Chamber Storage 11,348.5 cf Field - 3,449.0 cf Chambers = 7,899.5 cf Stone x 40.0% Voids = 3,159.8 cf Stone Storage Chamber Storage + Stone Storage = 6,608.8 cf = 0.152 af Overall Storage Efficiency = 58.2% 126 Chambers 420.3 cy Field 292.6 cy Stone PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 64HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 13P: North Chambers Inflow Outflow Discarded Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 5 4 3 2 1 0 Inflow Area=1.000 ac Peak Elev=947.06' Storage=4,545 cf 4.54 cfs 2.81 cfs 0.03 cfs 2.78 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 65HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Pond 13P: North Chambers Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Discarded (cfs) Primary (cfs) 0.00 0.00 0 945.50 0.00 0.00 0.00 5.00 0.00 0 945.50 0.00 0.00 0.00 10.00 0.07 87 945.55 0.03 0.03 0.00 15.00 0.12 3,527 946.74 0.13 0.03 0.10 20.00 0.03 3,394 946.70 0.03 0.03 0.00 25.00 0.00 3,143 946.63 0.03 0.03 0.00 30.00 0.00 2,548 946.46 0.03 0.03 0.00 35.00 0.00 1,959 946.29 0.03 0.03 0.00 40.00 0.00 1,375 946.13 0.03 0.03 0.00 45.00 0.00 798 945.95 0.03 0.03 0.00 50.00 0.00 230 945.63 0.03 0.03 0.00 55.00 0.00 0 945.50 0.00 0.00 0.00 60.00 0.00 0 945.50 0.00 0.00 0.00 65.00 0.00 0 945.50 0.00 0.00 0.00 70.00 0.00 0 945.50 0.00 0.00 0.00 75.00 0.00 0 945.50 0.00 0.00 0.00 80.00 0.00 0 945.50 0.00 0.00 0.00 85.00 0.00 0 945.50 0.00 0.00 0.00 90.00 0.00 0 945.50 0.00 0.00 0.00 95.00 0.00 0 945.50 0.00 0.00 0.00 100.00 0.00 0 945.50 0.00 0.00 0.00 105.00 0.00 0 945.50 0.00 0.00 0.00 110.00 0.00 0 945.50 0.00 0.00 0.00 115.00 0.00 0 945.50 0.00 0.00 0.00 120.00 0.00 0 945.50 0.00 0.00 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 66HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 14S: DA:P1 Runoff = 4.54 cfs @ 12.09 hrs, Volume= 0.267 af, Depth= 3.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 10-yr Rainfall=4.20" Area (ac) CN Description * 0.800 98 0.200 61 >75% Grass cover, Good, HSG B 1.000 91 Weighted Average 0.200 20.00% Pervious Area 0.800 80.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 14S: DA:P1 Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 5 4 3 2 1 0 Atlas 14 24-hr S0 10-yr Rainfall=4.20" Runoff Area=1.000 ac Runoff Volume=0.267 af Runoff Depth=3.21" Tc=10.0 min CN=91 4.54 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 67HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 14S: DA:P1 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.04 0.00 0.00 4.00 0.10 0.00 0.00 6.00 0.16 0.00 0.00 8.00 0.30 0.01 0.01 10.00 0.55 0.09 0.07 12.00 2.36 1.48 2.72 14.00 3.66 2.69 0.17 16.00 3.90 2.92 0.08 18.00 4.04 3.05 0.06 20.00 4.10 3.12 0.03 22.00 4.16 3.17 0.02 24.00 4.20 3.21 0.02 26.00 4.20 3.21 0.00 28.00 4.20 3.21 0.00 30.00 4.20 3.21 0.00 32.00 4.20 3.21 0.00 34.00 4.20 3.21 0.00 36.00 4.20 3.21 0.00 38.00 4.20 3.21 0.00 40.00 4.20 3.21 0.00 42.00 4.20 3.21 0.00 44.00 4.20 3.21 0.00 46.00 4.20 3.21 0.00 48.00 4.20 3.21 0.00 50.00 4.20 3.21 0.00 52.00 4.20 3.21 0.00 54.00 4.20 3.21 0.00 56.00 4.20 3.21 0.00 58.00 4.20 3.21 0.00 60.00 4.20 3.21 0.00 62.00 4.20 3.21 0.00 64.00 4.20 3.21 0.00 66.00 4.20 3.21 0.00 68.00 4.20 3.21 0.00 70.00 4.20 3.21 0.00 72.00 4.20 3.21 0.00 74.00 4.20 3.21 0.00 76.00 4.20 3.21 0.00 78.00 4.20 3.21 0.00 80.00 4.20 3.21 0.00 82.00 4.20 3.21 0.00 84.00 4.20 3.21 0.00 86.00 4.20 3.21 0.00 88.00 4.20 3.21 0.00 90.00 4.20 3.21 0.00 92.00 4.20 3.21 0.00 94.00 4.20 3.21 0.00 96.00 4.20 3.21 0.00 98.00 4.20 3.21 0.00 100.00 4.20 3.21 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 4.20 3.21 0.00 104.00 4.20 3.21 0.00 106.00 4.20 3.21 0.00 108.00 4.20 3.21 0.00 110.00 4.20 3.21 0.00 112.00 4.20 3.21 0.00 114.00 4.20 3.21 0.00 116.00 4.20 3.21 0.00 118.00 4.20 3.21 0.00 120.00 4.20 3.21 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 68HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Link 15L: Proposed Treatment Inflow Area = 2.600 ac, 76.92% Impervious, Inflow Depth = 1.73" for 10-yr event Inflow = 5.57 cfs @ 12.30 hrs, Volume= 0.376 af Primary = 5.57 cfs @ 12.30 hrs, Volume= 0.376 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Link 15L: Proposed Treatment Inflow Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 6 5 4 3 2 1 0 Inflow Area=2.600 ac 5.57 cfs 5.57 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 10-yr Rainfall=4.20"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 69HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Link 15L: Proposed Treatment Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 0.00 0.00 2.00 0.00 0.00 0.00 4.00 0.00 0.00 0.00 6.00 0.00 0.00 0.00 8.00 0.00 0.00 0.00 10.00 0.00 0.00 0.00 12.00 0.01 0.00 0.01 14.00 0.47 0.00 0.47 16.00 0.16 0.00 0.16 18.00 0.08 0.00 0.08 20.00 0.00 0.00 0.00 22.00 0.00 0.00 0.00 24.00 0.00 0.00 0.00 26.00 0.00 0.00 0.00 28.00 0.00 0.00 0.00 30.00 0.00 0.00 0.00 32.00 0.00 0.00 0.00 34.00 0.00 0.00 0.00 36.00 0.00 0.00 0.00 38.00 0.00 0.00 0.00 40.00 0.00 0.00 0.00 42.00 0.00 0.00 0.00 44.00 0.00 0.00 0.00 46.00 0.00 0.00 0.00 48.00 0.00 0.00 0.00 50.00 0.00 0.00 0.00 52.00 0.00 0.00 0.00 54.00 0.00 0.00 0.00 56.00 0.00 0.00 0.00 58.00 0.00 0.00 0.00 60.00 0.00 0.00 0.00 62.00 0.00 0.00 0.00 64.00 0.00 0.00 0.00 66.00 0.00 0.00 0.00 68.00 0.00 0.00 0.00 70.00 0.00 0.00 0.00 72.00 0.00 0.00 0.00 74.00 0.00 0.00 0.00 76.00 0.00 0.00 0.00 78.00 0.00 0.00 0.00 80.00 0.00 0.00 0.00 82.00 0.00 0.00 0.00 84.00 0.00 0.00 0.00 86.00 0.00 0.00 0.00 88.00 0.00 0.00 0.00 90.00 0.00 0.00 0.00 92.00 0.00 0.00 0.00 94.00 0.00 0.00 0.00 96.00 0.00 0.00 0.00 98.00 0.00 0.00 0.00 100.00 0.00 0.00 0.00 Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 102.00 0.00 0.00 0.00 104.00 0.00 0.00 0.00 106.00 0.00 0.00 0.00 108.00 0.00 0.00 0.00 110.00 0.00 0.00 0.00 112.00 0.00 0.00 0.00 114.00 0.00 0.00 0.00 116.00 0.00 0.00 0.00 118.00 0.00 0.00 0.00 120.00 0.00 0.00 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 70HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 3S: POND SURFACE AREA Runoff = 12.98 cfs @ 11.99 hrs, Volume= 0.724 af, Depth= 7.30" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 100-yr Rainfall=7.30" Area (ac) CN Description * 1.190 100 1.190 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.3 255 12.70 Lake or Reservoir, POND Mean Depth= 5.01' Subcatchment 3S: POND SURFACE AREA Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Atlas 14 24-hr S0 100-yr Rainfall=7.30" Runoff Area=1.190 ac Runoff Volume=0.724 af Runoff Depth=7.30" Flow Length=255' Tc=0.3 min CN=100 12.98 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 71HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 3S: POND SURFACE AREA Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.05 0.05 0.03 4.00 0.12 0.12 0.04 6.00 0.20 0.20 0.06 8.00 0.39 0.39 0.14 10.00 0.84 0.84 0.44 12.00 4.03 4.03 12.23 14.00 6.47 6.47 0.44 16.00 6.91 6.91 0.14 18.00 7.10 7.10 0.09 20.00 7.18 7.18 0.04 22.00 7.25 7.25 0.04 24.00 7.30 7.30 0.03 26.00 7.30 7.30 0.00 28.00 7.30 7.30 0.00 30.00 7.30 7.30 0.00 32.00 7.30 7.30 0.00 34.00 7.30 7.30 0.00 36.00 7.30 7.30 0.00 38.00 7.30 7.30 0.00 40.00 7.30 7.30 0.00 42.00 7.30 7.30 0.00 44.00 7.30 7.30 0.00 46.00 7.30 7.30 0.00 48.00 7.30 7.30 0.00 50.00 7.30 7.30 0.00 52.00 7.30 7.30 0.00 54.00 7.30 7.30 0.00 56.00 7.30 7.30 0.00 58.00 7.30 7.30 0.00 60.00 7.30 7.30 0.00 62.00 7.30 7.30 0.00 64.00 7.30 7.30 0.00 66.00 7.30 7.30 0.00 68.00 7.30 7.30 0.00 70.00 7.30 7.30 0.00 72.00 7.30 7.30 0.00 74.00 7.30 7.30 0.00 76.00 7.30 7.30 0.00 78.00 7.30 7.30 0.00 80.00 7.30 7.30 0.00 82.00 7.30 7.30 0.00 84.00 7.30 7.30 0.00 86.00 7.30 7.30 0.00 88.00 7.30 7.30 0.00 90.00 7.30 7.30 0.00 92.00 7.30 7.30 0.00 94.00 7.30 7.30 0.00 96.00 7.30 7.30 0.00 98.00 7.30 7.30 0.00 100.00 7.30 7.30 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 7.30 7.30 0.00 104.00 7.30 7.30 0.00 106.00 7.30 7.30 0.00 108.00 7.30 7.30 0.00 110.00 7.30 7.30 0.00 112.00 7.30 7.30 0.00 114.00 7.30 7.30 0.00 116.00 7.30 7.30 0.00 118.00 7.30 7.30 0.00 120.00 7.30 7.30 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 72HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 4S: POND INFLOW Runoff = 97.65 cfs @ 12.14 hrs, Volume= 7.246 af, Depth= 5.08" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 100-yr Rainfall=7.30" Area (ac) CN Description * 9.450 98 3.130 61 >75% Grass cover, Good, HSG B (UNGRADED) 4.520 58 Meadow, non-grazed, HSG B (UNGRADED) 17.100 81 Weighted Average 7.650 44.74% Pervious Area 9.450 55.26% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 11.5 123 0.0610 0.18 Sheet Flow, GRASS Grass: Dense n= 0.240 P2= 2.80" 0.8 61 0.0260 1.29 Sheet Flow, CURB Smooth surfaces n= 0.011 P2= 2.80" 1.3 875 0.0375 11.51 20.34 Pipe Channel, RCP 18.0" Round Area= 1.8 sf Perim= 4.7' r= 0.38' n= 0.013 Concrete pipe, straight & clean 13.6 1,059 Total Subcatchment 4S: POND INFLOW Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 105 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 Atlas 14 24-hr S0 100-yr Rainfall=7.30" Runoff Area=17.100 ac Runoff Volume=7.246 af Runoff Depth=5.08" Flow Length=1,059' Tc=13.6 min CN=81 97.65 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 73HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 4S: POND INFLOW Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.05 0.00 0.00 4.00 0.12 0.00 0.00 6.00 0.20 0.00 0.00 8.00 0.39 0.00 0.00 10.00 0.84 0.05 1.27 12.00 4.03 2.14 47.33 14.00 6.47 4.31 6.33 16.00 6.91 4.72 1.93 18.00 7.10 4.90 1.35 20.00 7.18 4.97 0.59 22.00 7.25 5.03 0.48 24.00 7.30 5.08 0.40 26.00 7.30 5.08 0.00 28.00 7.30 5.08 0.00 30.00 7.30 5.08 0.00 32.00 7.30 5.08 0.00 34.00 7.30 5.08 0.00 36.00 7.30 5.08 0.00 38.00 7.30 5.08 0.00 40.00 7.30 5.08 0.00 42.00 7.30 5.08 0.00 44.00 7.30 5.08 0.00 46.00 7.30 5.08 0.00 48.00 7.30 5.08 0.00 50.00 7.30 5.08 0.00 52.00 7.30 5.08 0.00 54.00 7.30 5.08 0.00 56.00 7.30 5.08 0.00 58.00 7.30 5.08 0.00 60.00 7.30 5.08 0.00 62.00 7.30 5.08 0.00 64.00 7.30 5.08 0.00 66.00 7.30 5.08 0.00 68.00 7.30 5.08 0.00 70.00 7.30 5.08 0.00 72.00 7.30 5.08 0.00 74.00 7.30 5.08 0.00 76.00 7.30 5.08 0.00 78.00 7.30 5.08 0.00 80.00 7.30 5.08 0.00 82.00 7.30 5.08 0.00 84.00 7.30 5.08 0.00 86.00 7.30 5.08 0.00 88.00 7.30 5.08 0.00 90.00 7.30 5.08 0.00 92.00 7.30 5.08 0.00 94.00 7.30 5.08 0.00 96.00 7.30 5.08 0.00 98.00 7.30 5.08 0.00 100.00 7.30 5.08 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 7.30 5.08 0.00 104.00 7.30 5.08 0.00 106.00 7.30 5.08 0.00 108.00 7.30 5.08 0.00 110.00 7.30 5.08 0.00 112.00 7.30 5.08 0.00 114.00 7.30 5.08 0.00 116.00 7.30 5.08 0.00 118.00 7.30 5.08 0.00 120.00 7.30 5.08 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 74HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: WETLAND INFLOW(1) Runoff = 11.62 cfs @ 12.33 hrs, Volume= 1.177 af, Depth= 2.62" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 100-yr Rainfall=7.30" Area (ac) CN Description 5.400 58 Meadow, non-grazed, HSG B 5.400 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 21.1 300 0.0800 0.24 Sheet Flow, GRASS Grass: Dense n= 0.240 P2= 2.80" 3.4 569 0.0343 2.78 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 24.5 869 Total Subcatchment 5S: WETLAND INFLOW(1) Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Atlas 14 24-hr S0 100-yr Rainfall=7.30" Runoff Area=5.400 ac Runoff Volume=1.177 af Runoff Depth=2.62" Flow Length=869' Tc=24.5 min CN=58 11.62 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 75HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 5S: WETLAND INFLOW(1) Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.05 0.00 0.00 4.00 0.12 0.00 0.00 6.00 0.20 0.00 0.00 8.00 0.39 0.00 0.00 10.00 0.84 0.00 0.00 12.00 4.03 0.68 2.61 14.00 6.47 2.05 1.63 16.00 6.91 2.35 0.46 18.00 7.10 2.48 0.32 20.00 7.18 2.53 0.14 22.00 7.25 2.58 0.11 24.00 7.30 2.62 0.10 26.00 7.30 2.62 0.00 28.00 7.30 2.62 0.00 30.00 7.30 2.62 0.00 32.00 7.30 2.62 0.00 34.00 7.30 2.62 0.00 36.00 7.30 2.62 0.00 38.00 7.30 2.62 0.00 40.00 7.30 2.62 0.00 42.00 7.30 2.62 0.00 44.00 7.30 2.62 0.00 46.00 7.30 2.62 0.00 48.00 7.30 2.62 0.00 50.00 7.30 2.62 0.00 52.00 7.30 2.62 0.00 54.00 7.30 2.62 0.00 56.00 7.30 2.62 0.00 58.00 7.30 2.62 0.00 60.00 7.30 2.62 0.00 62.00 7.30 2.62 0.00 64.00 7.30 2.62 0.00 66.00 7.30 2.62 0.00 68.00 7.30 2.62 0.00 70.00 7.30 2.62 0.00 72.00 7.30 2.62 0.00 74.00 7.30 2.62 0.00 76.00 7.30 2.62 0.00 78.00 7.30 2.62 0.00 80.00 7.30 2.62 0.00 82.00 7.30 2.62 0.00 84.00 7.30 2.62 0.00 86.00 7.30 2.62 0.00 88.00 7.30 2.62 0.00 90.00 7.30 2.62 0.00 92.00 7.30 2.62 0.00 94.00 7.30 2.62 0.00 96.00 7.30 2.62 0.00 98.00 7.30 2.62 0.00 100.00 7.30 2.62 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 7.30 2.62 0.00 104.00 7.30 2.62 0.00 106.00 7.30 2.62 0.00 108.00 7.30 2.62 0.00 110.00 7.30 2.62 0.00 112.00 7.30 2.62 0.00 114.00 7.30 2.62 0.00 116.00 7.30 2.62 0.00 118.00 7.30 2.62 0.00 120.00 7.30 2.62 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 76HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: WETLAND INFLOW(2) Runoff = 8.29 cfs @ 12.31 hrs, Volume= 0.826 af, Depth= 2.72" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 100-yr Rainfall=7.30" Area (ac) CN Description 3.010 58 Meadow, non-grazed, HSG B 0.640 61 >75% Grass cover, Good, HSG B 3.650 59 Weighted Average 3.650 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 23.7 300 0.0600 0.21 Sheet Flow, GRASS Grass: Dense n= 0.240 P2= 2.80" 0.3 89 0.1350 5.51 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 24.0 389 Total Subcatchment 6S: WETLAND INFLOW(2) Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 9 8 7 6 5 4 3 2 1 0 Atlas 14 24-hr S0 100-yr Rainfall=7.30" Runoff Area=3.650 ac Runoff Volume=0.826 af Runoff Depth=2.72" Flow Length=389' Tc=24.0 min CN=59 8.29 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 77HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: WETLAND INFLOW(2) Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.05 0.00 0.00 4.00 0.12 0.00 0.00 6.00 0.20 0.00 0.00 8.00 0.39 0.00 0.00 10.00 0.84 0.00 0.00 12.00 4.03 0.72 1.96 14.00 6.47 2.14 1.12 16.00 6.91 2.44 0.32 18.00 7.10 2.58 0.22 20.00 7.18 2.63 0.10 22.00 7.25 2.68 0.08 24.00 7.30 2.72 0.07 26.00 7.30 2.72 0.00 28.00 7.30 2.72 0.00 30.00 7.30 2.72 0.00 32.00 7.30 2.72 0.00 34.00 7.30 2.72 0.00 36.00 7.30 2.72 0.00 38.00 7.30 2.72 0.00 40.00 7.30 2.72 0.00 42.00 7.30 2.72 0.00 44.00 7.30 2.72 0.00 46.00 7.30 2.72 0.00 48.00 7.30 2.72 0.00 50.00 7.30 2.72 0.00 52.00 7.30 2.72 0.00 54.00 7.30 2.72 0.00 56.00 7.30 2.72 0.00 58.00 7.30 2.72 0.00 60.00 7.30 2.72 0.00 62.00 7.30 2.72 0.00 64.00 7.30 2.72 0.00 66.00 7.30 2.72 0.00 68.00 7.30 2.72 0.00 70.00 7.30 2.72 0.00 72.00 7.30 2.72 0.00 74.00 7.30 2.72 0.00 76.00 7.30 2.72 0.00 78.00 7.30 2.72 0.00 80.00 7.30 2.72 0.00 82.00 7.30 2.72 0.00 84.00 7.30 2.72 0.00 86.00 7.30 2.72 0.00 88.00 7.30 2.72 0.00 90.00 7.30 2.72 0.00 92.00 7.30 2.72 0.00 94.00 7.30 2.72 0.00 96.00 7.30 2.72 0.00 98.00 7.30 2.72 0.00 100.00 7.30 2.72 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 7.30 2.72 0.00 104.00 7.30 2.72 0.00 106.00 7.30 2.72 0.00 108.00 7.30 2.72 0.00 110.00 7.30 2.72 0.00 112.00 7.30 2.72 0.00 114.00 7.30 2.72 0.00 116.00 7.30 2.72 0.00 118.00 7.30 2.72 0.00 120.00 7.30 2.72 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 78HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Pond 7P: POND Inflow Area = 20.890 ac, 60.51% Impervious, Inflow Depth = 5.16" for 100-yr event Inflow = 114.25 cfs @ 12.14 hrs, Volume= 8.981 af Outflow = 41.86 cfs @ 12.54 hrs, Volume= 8.944 af, Atten= 63%, Lag= 23.9 min Primary = 26.78 cfs @ 12.54 hrs, Volume= 8.246 af Secondary = 15.08 cfs @ 12.54 hrs, Volume= 0.697 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs / 2 Starting Elev= 906.00' Surf.Area= 51,912 sf Storage= 256,706 cf Peak Elev= 909.03' @ 12.54 hrs Surf.Area= 66,330 sf Storage= 435,508 cf (178,801 cf above start) Plug-Flow detention time= 743.1 min calculated for 3.051 af (34% of inflow) Center-of-Mass det. time= 236.8 min ( 1,012.1 - 775.3 ) Volume Invert Avail.Storage Storage Description #1 897.00' 499,920 cf Custom Stage Data (Irregular) Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 897.00 0 0.0 0 0 0 898.00 17,063 702.0 5,688 5,688 39,218 900.00 23,171 823.0 40,079 45,766 53,981 902.00 30,413 919.3 53,420 99,186 67,446 904.00 37,850 1,008.5 68,128 167,314 81,265 906.00 51,912 1,152.3 89,393 256,706 106,086 908.00 61,309 1,206.3 113,091 369,797 116,492 908.50 63,774 1,214.0 31,269 401,066 118,094 909.00 66,330 1,235.0 32,524 433,590 122,232 910.00 66,330 1,235.0 66,330 499,920 123,467 Device Routing Invert Outlet Devices #1 Secondary 910.50'120.0" W x 6.0" H Box RIP RAP OVERFLOW L= 25.0' Ke= 1.000 Inlet / Outlet Invert= 910.50' / 905.30' S= 0.2080 '/' Cc= 0.900 n= 0.035, Flow Area= 5.00 sf #2 Primary 905.20'27.0" Round OUTLET PIPE L= 30.0' RCP, mitered to conform to fill, Ke= 0.700 Inlet / Outlet Invert= 905.20' / 904.50' S= 0.0233 '/' Cc= 0.900 n= 0.013 Concrete pipe, straight & clean, Flow Area= 3.98 sf #3 Device 2 906.00'5' SLOTTED WIER, Cv= 2.62 (C= 3.28) Head (feet) 0.00 1.00 1.00 2.50 2.50 Width (feet) 0.40 0.75 5.00 5.00 0.00 #4 Device 3 902.00'27.0" Round INLET PIPE L= 32.0' CMP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 901.00' / 902.00' S= -0.0313 '/' Cc= 0.900 n= 0.030 Corrugated metal, Flow Area= 3.98 sf #5 Device 2 908.50'5.0" Horiz. Top Grate C= 0.600 Limited to weir flow at low heads #6 Secondary 908.50'Overland Overflow, Cv= 2.62 (C= 3.28) Head (feet) 0.00 0.50 0.50 1.00 Width (feet) 10.00 12.00 100.00 100.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 79HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Primary OutFlow Max=26.78 cfs @ 12.54 hrs HW=909.03' TW=0.00' (Dynamic Tailwater) 2=OUTLET PIPE (Passes 26.78 cfs of 27.78 cfs potential flow) 3=5' SLOTTED WIER (Passes 26.30 cfs of 45.46 cfs potential flow) 4=INLET PIPE (Inlet Controls 26.30 cfs @ 6.62 fps) 5=Top Grate (Orifice Controls 0.48 cfs @ 3.50 fps) Secondary OutFlow Max=15.08 cfs @ 12.54 hrs HW=909.03' TW=0.00' (Dynamic Tailwater) 1=RIP RAP OVERFLOW ( Controls 0.00 cfs) 6=Overland Overflow (Weir Controls 15.08 cfs @ 1.80 fps) Pond 7P: POND Inflow Outflow Primary Secondary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 120 110 100 90 80 70 60 50 40 30 20 10 0 Inflow Area=20.890 ac Peak Elev=909.03' Storage=435,508 cf 114.25 cfs 41.86 cfs 26.78 cfs 15.08 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 80HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Pond 7P: POND Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Primary (cfs) Secondary (cfs) 0.00 0.00 256,707 906.00 0.00 0.00 0.00 5.00 0.05 257,369 906.01 0.00 0.00 0.00 10.00 1.71 262,288 906.11 0.05 0.05 0.00 15.00 5.57 345,584 907.60 10.45 10.45 0.00 20.00 0.65 308,616 906.96 1.64 1.64 0.00 25.00 0.00 293,663 906.69 0.93 0.93 0.00 30.00 0.00 281,480 906.47 0.49 0.49 0.00 35.00 0.00 274,673 906.34 0.29 0.29 0.00 40.00 0.00 270,417 906.26 0.19 0.19 0.00 45.00 0.00 267,552 906.21 0.13 0.13 0.00 50.00 0.00 265,521 906.17 0.10 0.10 0.00 55.00 0.00 264,022 906.14 0.07 0.07 0.00 60.00 0.00 262,882 906.12 0.06 0.06 0.00 65.00 0.00 261,993 906.10 0.04 0.04 0.00 70.00 0.00 261,286 906.09 0.04 0.04 0.00 75.00 0.00 260,714 906.08 0.03 0.03 0.00 80.00 0.00 260,244 906.07 0.02 0.02 0.00 85.00 0.00 259,852 906.06 0.02 0.02 0.00 90.00 0.00 259,523 906.05 0.02 0.02 0.00 95.00 0.00 259,243 906.05 0.01 0.01 0.00 100.00 0.00 259,003 906.04 0.01 0.01 0.00 105.00 0.00 258,796 906.04 0.01 0.01 0.00 110.00 0.00 258,616 906.04 0.01 0.01 0.00 115.00 0.00 258,458 906.03 0.01 0.01 0.00 120.00 0.00 258,319 906.03 0.01 0.01 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 81HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 7S: DA:P3 Runoff = 4.01 cfs @ 12.08 hrs, Volume= 0.294 af, Depth= 7.06" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 100-yr Rainfall=7.30" Area (ac) CN Description * 0.500 98 0.500 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 7S: DA:P3 Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 4 3 2 1 0 Atlas 14 24-hr S0 100-yr Rainfall=7.30" Runoff Area=0.500 ac Runoff Volume=0.294 af Runoff Depth=7.06" Tc=10.0 min CN=98 4.01 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 82HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 7S: DA:P3 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.05 0.00 0.00 4.00 0.12 0.02 0.01 6.00 0.20 0.07 0.02 8.00 0.39 0.22 0.05 10.00 0.84 0.64 0.17 12.00 4.03 3.79 2.52 14.00 6.47 6.23 0.19 16.00 6.91 6.67 0.06 18.00 7.10 6.86 0.04 20.00 7.18 6.94 0.02 22.00 7.25 7.01 0.01 24.00 7.30 7.06 0.01 26.00 7.30 7.06 0.00 28.00 7.30 7.06 0.00 30.00 7.30 7.06 0.00 32.00 7.30 7.06 0.00 34.00 7.30 7.06 0.00 36.00 7.30 7.06 0.00 38.00 7.30 7.06 0.00 40.00 7.30 7.06 0.00 42.00 7.30 7.06 0.00 44.00 7.30 7.06 0.00 46.00 7.30 7.06 0.00 48.00 7.30 7.06 0.00 50.00 7.30 7.06 0.00 52.00 7.30 7.06 0.00 54.00 7.30 7.06 0.00 56.00 7.30 7.06 0.00 58.00 7.30 7.06 0.00 60.00 7.30 7.06 0.00 62.00 7.30 7.06 0.00 64.00 7.30 7.06 0.00 66.00 7.30 7.06 0.00 68.00 7.30 7.06 0.00 70.00 7.30 7.06 0.00 72.00 7.30 7.06 0.00 74.00 7.30 7.06 0.00 76.00 7.30 7.06 0.00 78.00 7.30 7.06 0.00 80.00 7.30 7.06 0.00 82.00 7.30 7.06 0.00 84.00 7.30 7.06 0.00 86.00 7.30 7.06 0.00 88.00 7.30 7.06 0.00 90.00 7.30 7.06 0.00 92.00 7.30 7.06 0.00 94.00 7.30 7.06 0.00 96.00 7.30 7.06 0.00 98.00 7.30 7.06 0.00 100.00 7.30 7.06 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 7.30 7.06 0.00 104.00 7.30 7.06 0.00 106.00 7.30 7.06 0.00 108.00 7.30 7.06 0.00 110.00 7.30 7.06 0.00 112.00 7.30 7.06 0.00 114.00 7.30 7.06 0.00 116.00 7.30 7.06 0.00 118.00 7.30 7.06 0.00 120.00 7.30 7.06 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 83HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Link 8L: WETLAND Inflow Area = 29.940 ac, 42.22% Impervious, Inflow Depth > 4.39" for 100-yr event Inflow = 57.22 cfs @ 12.50 hrs, Volume= 10.947 af Primary = 57.22 cfs @ 12.50 hrs, Volume= 10.947 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Link 8L: WETLAND Inflow Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 60 55 50 45 40 35 30 25 20 15 10 5 0 Inflow Area=29.940 ac 57.22 cfs 57.22 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 84HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Link 8L: WETLAND Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 0.00 0.00 2.00 0.00 0.00 0.00 4.00 0.00 0.00 0.00 6.00 0.00 0.00 0.00 8.00 0.01 0.00 0.01 10.00 0.05 0.00 0.05 12.00 11.87 0.00 11.87 14.00 24.73 0.00 24.73 16.00 6.26 0.00 6.26 18.00 3.13 0.00 3.13 20.00 1.88 0.00 1.88 22.00 1.51 0.00 1.51 24.00 1.24 0.00 1.24 26.00 0.81 0.00 0.81 28.00 0.62 0.00 0.62 30.00 0.49 0.00 0.49 32.00 0.39 0.00 0.39 34.00 0.32 0.00 0.32 36.00 0.27 0.00 0.27 38.00 0.22 0.00 0.22 40.00 0.19 0.00 0.19 42.00 0.16 0.00 0.16 44.00 0.14 0.00 0.14 46.00 0.12 0.00 0.12 48.00 0.11 0.00 0.11 50.00 0.10 0.00 0.10 52.00 0.09 0.00 0.09 54.00 0.08 0.00 0.08 56.00 0.07 0.00 0.07 58.00 0.06 0.00 0.06 60.00 0.06 0.00 0.06 62.00 0.05 0.00 0.05 64.00 0.05 0.00 0.05 66.00 0.04 0.00 0.04 68.00 0.04 0.00 0.04 70.00 0.04 0.00 0.04 72.00 0.03 0.00 0.03 74.00 0.03 0.00 0.03 76.00 0.03 0.00 0.03 78.00 0.03 0.00 0.03 80.00 0.02 0.00 0.02 82.00 0.02 0.00 0.02 84.00 0.02 0.00 0.02 86.00 0.02 0.00 0.02 88.00 0.02 0.00 0.02 90.00 0.02 0.00 0.02 92.00 0.02 0.00 0.02 94.00 0.01 0.00 0.01 96.00 0.01 0.00 0.01 98.00 0.01 0.00 0.01 100.00 0.01 0.00 0.01 Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 102.00 0.01 0.00 0.01 104.00 0.01 0.00 0.01 106.00 0.01 0.00 0.01 108.00 0.01 0.00 0.01 110.00 0.01 0.00 0.01 112.00 0.01 0.00 0.01 114.00 0.01 0.00 0.01 116.00 0.01 0.00 0.01 118.00 0.01 0.00 0.01 120.00 0.01 0.00 0.01 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 85HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 9S: DA:P2 Runoff = 6.52 cfs @ 12.16 hrs, Volume= 0.508 af, Depth= 5.54" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 100-yr Rainfall=7.30" Area (ac) CN Description * 0.700 98 0.400 61 >75% Grass cover, Good, HSG B 1.100 85 Weighted Average 0.400 36.36% Pervious Area 0.700 63.64% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 Direct Entry, Subcatchment 9S: DA:P2 Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 7 6 5 4 3 2 1 0 Atlas 14 24-hr S0 100-yr Rainfall=7.30" Runoff Area=1.100 ac Runoff Volume=0.508 af Runoff Depth=5.54" Tc=15.0 min CN=85 6.52 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 86HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 9S: DA:P2 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.05 0.00 0.00 4.00 0.12 0.00 0.00 6.00 0.20 0.00 0.00 8.00 0.39 0.00 0.00 10.00 0.84 0.11 0.13 12.00 4.03 2.48 3.04 14.00 6.47 4.74 0.43 16.00 6.91 5.17 0.13 18.00 7.10 5.35 0.09 20.00 7.18 5.43 0.04 22.00 7.25 5.49 0.03 24.00 7.30 5.54 0.03 26.00 7.30 5.54 0.00 28.00 7.30 5.54 0.00 30.00 7.30 5.54 0.00 32.00 7.30 5.54 0.00 34.00 7.30 5.54 0.00 36.00 7.30 5.54 0.00 38.00 7.30 5.54 0.00 40.00 7.30 5.54 0.00 42.00 7.30 5.54 0.00 44.00 7.30 5.54 0.00 46.00 7.30 5.54 0.00 48.00 7.30 5.54 0.00 50.00 7.30 5.54 0.00 52.00 7.30 5.54 0.00 54.00 7.30 5.54 0.00 56.00 7.30 5.54 0.00 58.00 7.30 5.54 0.00 60.00 7.30 5.54 0.00 62.00 7.30 5.54 0.00 64.00 7.30 5.54 0.00 66.00 7.30 5.54 0.00 68.00 7.30 5.54 0.00 70.00 7.30 5.54 0.00 72.00 7.30 5.54 0.00 74.00 7.30 5.54 0.00 76.00 7.30 5.54 0.00 78.00 7.30 5.54 0.00 80.00 7.30 5.54 0.00 82.00 7.30 5.54 0.00 84.00 7.30 5.54 0.00 86.00 7.30 5.54 0.00 88.00 7.30 5.54 0.00 90.00 7.30 5.54 0.00 92.00 7.30 5.54 0.00 94.00 7.30 5.54 0.00 96.00 7.30 5.54 0.00 98.00 7.30 5.54 0.00 100.00 7.30 5.54 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 7.30 5.54 0.00 104.00 7.30 5.54 0.00 106.00 7.30 5.54 0.00 108.00 7.30 5.54 0.00 110.00 7.30 5.54 0.00 112.00 7.30 5.54 0.00 114.00 7.30 5.54 0.00 116.00 7.30 5.54 0.00 118.00 7.30 5.54 0.00 120.00 7.30 5.54 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 87HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Pond 11P: Middle Chambers Inflow Area = 1.100 ac, 63.64% Impervious, Inflow Depth = 5.54" for 100-yr event Inflow = 6.52 cfs @ 12.16 hrs, Volume= 0.508 af Outflow = 5.39 cfs @ 12.25 hrs, Volume= 0.508 af, Atten= 17%, Lag= 5.9 min Discarded = 0.03 cfs @ 12.25 hrs, Volume= 0.113 af Primary = 5.36 cfs @ 12.25 hrs, Volume= 0.394 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 947.51' @ 12.25 hrs Surf.Area= 4,228 sf Storage= 5,366 cf Plug-Flow detention time= 245.2 min calculated for 0.508 af (100% of inflow) Center-of-Mass det. time= 245.3 min ( 1,021.3 - 776.0 ) Volume Invert Avail.Storage Storage Description #1A 945.50' 2,992 cf 56.75'W x 74.50'L x 2.54'H Field A 10,746 cf Overall - 3,265 cf Embedded = 7,481 cf x 40.0% Voids #2A 946.00' 3,265 cf Cultec R-150XLHD x 119 Inside #1 Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 17 rows 6,257 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 946.00'15.0" Round EX. 15" RCP L= 20.0' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 946.00' / 945.90' S= 0.0050 '/' Cc= 0.900 n= 0.013 Concrete pipe, straight & clean, Flow Area= 1.23 sf #2 Device 1 946.70'Weir Wall, Cv= 2.62 (C= 3.28) Head (feet) 0.00 1.00 1.00 2.30 Width (feet) 4.00 4.00 4.00 4.00 #3 Discarded 945.50'0.300 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.03 cfs @ 12.25 hrs HW=947.51' (Free Discharge) 3=Exfiltration (Exfiltration Controls 0.03 cfs) Primary OutFlow Max=5.36 cfs @ 12.25 hrs HW=947.51' TW=0.00' (Dynamic Tailwater) 1=EX. 15" RCP (Barrel Controls 5.36 cfs @ 4.58 fps) 2=Weir Wall (Passes 5.36 cfs of 9.62 cfs potential flow) PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 88HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 11P: Middle Chambers - Chamber Wizard Field A Chamber Model = Cultec R-150XLHD (Cultec Recharger® 150XLHD) Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 17 rows 33.0" Wide + 6.0" Spacing = 39.0" C-C Row Spacing 7 Chambers/Row x 10.25' Long +0.75' Row Adjustment = 72.50' Row Length +12.0" End Stone x 2 = 74.50' Base Length 17 Rows x 33.0" Wide + 6.0" Spacing x 16 + 12.0" Side Stone x 2 = 56.75' Base Width 6.0" Base + 18.5" Chamber Height + 6.0" Cover = 2.54' Field Height 119 Chambers x 27.2 cf +0.75' Row Adjustment x 2.65 sf x 17 Rows = 3,264.9 cf Chamber Storage 10,745.8 cf Field - 3,264.9 cf Chambers = 7,481.0 cf Stone x 40.0% Voids = 2,992.4 cf Stone Storage Chamber Storage + Stone Storage = 6,257.3 cf = 0.144 af Overall Storage Efficiency = 58.2% 119 Chambers 398.0 cy Field 277.1 cy Stone PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 89HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 11P: Middle Chambers Inflow Outflow Discarded Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 7 6 5 4 3 2 1 0 Inflow Area=1.100 ac Peak Elev=947.51' Storage=5,366 cf 6.52 cfs 5.39 cfs 0.03 cfs 5.36 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 90HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Pond 11P: Middle Chambers Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Discarded (cfs) Primary (cfs) 0.00 0.00 0 945.50 0.00 0.00 0.00 5.00 0.00 0 945.50 0.00 0.00 0.00 10.00 0.13 177 945.60 0.03 0.03 0.00 15.00 0.30 3,464 946.78 0.32 0.03 0.29 20.00 0.04 3,241 946.71 0.04 0.03 0.01 25.00 0.00 3,110 946.67 0.03 0.03 0.00 30.00 0.00 2,546 946.50 0.03 0.03 0.00 35.00 0.00 1,988 946.33 0.03 0.03 0.00 40.00 0.00 1,435 946.17 0.03 0.03 0.00 45.00 0.00 887 946.01 0.03 0.03 0.00 50.00 0.00 346 945.70 0.03 0.03 0.00 55.00 0.00 0 945.50 0.00 0.00 0.00 60.00 0.00 0 945.50 0.00 0.00 0.00 65.00 0.00 0 945.50 0.00 0.00 0.00 70.00 0.00 0 945.50 0.00 0.00 0.00 75.00 0.00 0 945.50 0.00 0.00 0.00 80.00 0.00 0 945.50 0.00 0.00 0.00 85.00 0.00 0 945.50 0.00 0.00 0.00 90.00 0.00 0 945.50 0.00 0.00 0.00 95.00 0.00 0 945.50 0.00 0.00 0.00 100.00 0.00 0 945.50 0.00 0.00 0.00 105.00 0.00 0 945.50 0.00 0.00 0.00 110.00 0.00 0 945.50 0.00 0.00 0.00 115.00 0.00 0 945.50 0.00 0.00 0.00 120.00 0.00 0 945.50 0.00 0.00 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 91HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Pond 12P: South Chambers Inflow Area = 0.500 ac,100.00% Impervious, Inflow Depth = 7.06" for 100-yr event Inflow = 4.01 cfs @ 12.08 hrs, Volume= 0.294 af Outflow = 3.79 cfs @ 12.12 hrs, Volume= 0.294 af, Atten= 6%, Lag= 2.1 min Discarded = 0.02 cfs @ 12.12 hrs, Volume= 0.074 af Primary = 3.77 cfs @ 12.12 hrs, Volume= 0.220 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 939.45' @ 12.12 hrs Surf.Area= 2,533 sf Storage= 3,639 cf Plug-Flow detention time= 264.1 min calculated for 0.294 af (100% of inflow) Center-of-Mass det. time= 264.2 min ( 1,005.5 - 741.3 ) Volume Invert Avail.Storage Storage Description #1A 937.00' 1,807 cf 34.00'W x 74.50'L x 2.54'H Field A 6,438 cf Overall - 1,921 cf Embedded = 4,518 cf x 40.0% Voids #2A 937.50' 1,921 cf Cultec R-150XLHD x 70 Inside #1 Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 10 rows 3,728 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 937.50'15.0" Round 15" RCP L= 20.0' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 937.50' / 937.40' S= 0.0050 '/' Cc= 0.900 n= 0.013 Concrete pipe, straight & clean, Flow Area= 1.23 sf #2 Device 1 938.20'Weir Wall, Cv= 2.62 (C= 3.28) Head (feet) 0.00 1.00 1.00 1.30 Width (feet) 0.50 0.50 4.00 4.00 #3 Discarded 937.00'0.300 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.02 cfs @ 12.12 hrs HW=939.45' (Free Discharge) 3=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=3.76 cfs @ 12.12 hrs HW=939.45' TW=0.00' (Dynamic Tailwater) 1=15" RCP (Passes 3.76 cfs of 7.05 cfs potential flow) 2=Weir Wall (Weir Controls 3.76 cfs @ 2.48 fps) PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 92HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 12P: South Chambers - Chamber Wizard Field A Chamber Model = Cultec R-150XLHD (Cultec Recharger® 150XLHD) Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 10 rows 33.0" Wide + 6.0" Spacing = 39.0" C-C Row Spacing 7 Chambers/Row x 10.25' Long +0.75' Row Adjustment = 72.50' Row Length +12.0" End Stone x 2 = 74.50' Base Length 10 Rows x 33.0" Wide + 6.0" Spacing x 9 + 12.0" Side Stone x 2 = 34.00' Base Width 6.0" Base + 18.5" Chamber Height + 6.0" Cover = 2.54' Field Height 70 Chambers x 27.2 cf +0.75' Row Adjustment x 2.65 sf x 10 Rows = 1,920.5 cf Chamber Storage 6,438.0 cf Field - 1,920.5 cf Chambers = 4,517.5 cf Stone x 40.0% Voids = 1,807.0 cf Stone Storage Chamber Storage + Stone Storage = 3,727.5 cf = 0.086 af Overall Storage Efficiency = 57.9% 70 Chambers 238.4 cy Field 167.3 cy Stone PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 93HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 12P: South Chambers Inflow Outflow Discarded Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 4 3 2 1 0 Inflow Area=0.500 ac Peak Elev=939.45' Storage=3,639 cf 4.01 cfs 3.79 cfs 0.02 cfs 3.77 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 94HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Pond 12P: South Chambers Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Discarded (cfs) Primary (cfs) 0.00 0.00 0 937.00 0.00 0.00 0.00 5.00 0.01 6 937.01 0.01 0.01 0.00 10.00 0.17 699 937.59 0.02 0.02 0.00 15.00 0.14 2,287 938.40 0.17 0.02 0.15 20.00 0.02 1,957 938.22 0.03 0.02 0.01 25.00 0.00 1,814 938.15 0.02 0.02 0.00 30.00 0.00 1,468 937.97 0.02 0.02 0.00 35.00 0.00 1,128 937.80 0.02 0.02 0.00 40.00 0.00 792 937.64 0.02 0.02 0.00 45.00 0.00 460 937.45 0.02 0.02 0.00 50.00 0.00 135 937.13 0.02 0.02 0.00 55.00 0.00 0 937.00 0.00 0.00 0.00 60.00 0.00 0 937.00 0.00 0.00 0.00 65.00 0.00 0 937.00 0.00 0.00 0.00 70.00 0.00 0 937.00 0.00 0.00 0.00 75.00 0.00 0 937.00 0.00 0.00 0.00 80.00 0.00 0 937.00 0.00 0.00 0.00 85.00 0.00 0 937.00 0.00 0.00 0.00 90.00 0.00 0 937.00 0.00 0.00 0.00 95.00 0.00 0 937.00 0.00 0.00 0.00 100.00 0.00 0 937.00 0.00 0.00 0.00 105.00 0.00 0 937.00 0.00 0.00 0.00 110.00 0.00 0 937.00 0.00 0.00 0.00 115.00 0.00 0 937.00 0.00 0.00 0.00 120.00 0.00 0 937.00 0.00 0.00 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 95HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Pond 13P: North Chambers Inflow Area = 1.000 ac, 80.00% Impervious, Inflow Depth = 6.23" for 100-yr event Inflow = 7.61 cfs @ 12.08 hrs, Volume= 0.520 af Outflow = 5.24 cfs @ 12.20 hrs, Volume= 0.520 af, Atten= 31%, Lag= 6.7 min Discarded = 0.04 cfs @ 12.20 hrs, Volume= 0.123 af Primary = 5.20 cfs @ 12.20 hrs, Volume= 0.397 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 947.78' @ 12.20 hrs Surf.Area= 4,465 sf Storage= 6,141 cf Plug-Flow detention time= 253.3 min calculated for 0.519 af (100% of inflow) Center-of-Mass det. time= 253.4 min ( 1,014.4 - 761.0 ) Volume Invert Avail.Storage Storage Description #1A 945.50' 3,160 cf 47.00'W x 95.00'L x 2.54'H Field A 11,349 cf Overall - 3,449 cf Embedded = 7,900 cf x 40.0% Voids #2A 946.00' 3,449 cf Cultec R-150XLHD x 126 Inside #1 Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 14 rows 6,609 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 946.00'15.0" Round EX. 15" RCP L= 65.0' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 946.00' / 945.80' S= 0.0031 '/' Cc= 0.900 n= 0.013 Concrete pipe, straight & clean, Flow Area= 1.23 sf #2 Device 1 946.70'Weir Wall, Cv= 2.62 (C= 3.28) Head (feet) 0.00 1.00 2.00 2.30 Width (feet) 4.00 4.00 4.00 4.00 #3 Discarded 945.50'0.300 in/hr Exfiltration over Wetted area Phase-In= 0.01' Discarded OutFlow Max=0.04 cfs @ 12.20 hrs HW=947.78' (Free Discharge) 3=Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=5.20 cfs @ 12.20 hrs HW=947.78' TW=0.00' (Dynamic Tailwater) 1=EX. 15" RCP (Barrel Controls 5.20 cfs @ 4.24 fps) 2=Weir Wall (Passes 5.20 cfs of 14.69 cfs potential flow) PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 96HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 13P: North Chambers - Chamber Wizard Field A Chamber Model = Cultec R-150XLHD (Cultec Recharger® 150XLHD) Effective Size= 29.8"W x 18.0"H => 2.65 sf x 10.25'L = 27.2 cf Overall Size= 33.0"W x 18.5"H x 11.00'L with 0.75' Overlap Row Length Adjustment= +0.75' x 2.65 sf x 14 rows 33.0" Wide + 6.0" Spacing = 39.0" C-C Row Spacing 9 Chambers/Row x 10.25' Long +0.75' Row Adjustment = 93.00' Row Length +12.0" End Stone x 2 = 95.00' Base Length 14 Rows x 33.0" Wide + 6.0" Spacing x 13 + 12.0" Side Stone x 2 = 47.00' Base Width 6.0" Base + 18.5" Chamber Height + 6.0" Cover = 2.54' Field Height 126 Chambers x 27.2 cf +0.75' Row Adjustment x 2.65 sf x 14 Rows = 3,449.0 cf Chamber Storage 11,348.5 cf Field - 3,449.0 cf Chambers = 7,899.5 cf Stone x 40.0% Voids = 3,159.8 cf Stone Storage Chamber Storage + Stone Storage = 6,608.8 cf = 0.152 af Overall Storage Efficiency = 58.2% 126 Chambers 420.3 cy Field 292.6 cy Stone PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 97HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Pond 13P: North Chambers Inflow Outflow Discarded Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 8 7 6 5 4 3 2 1 0 Inflow Area=1.000 ac Peak Elev=947.78' Storage=6,141 cf 7.61 cfs 5.24 cfs 0.04 cfs 5.20 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 98HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Pond 13P: North Chambers Time (hours) Inflow (cfs) Storage (cubic-feet) Elevation (feet) Outflow (cfs) Discarded (cfs) Primary (cfs) 0.00 0.00 0 945.50 0.00 0.00 0.00 5.00 0.00 0 945.50 0.00 0.00 0.00 10.00 0.22 493 945.78 0.03 0.03 0.00 15.00 0.28 3,642 946.77 0.29 0.03 0.26 20.00 0.04 3,415 946.71 0.04 0.03 0.01 25.00 0.00 3,239 946.65 0.03 0.03 0.00 30.00 0.00 2,643 946.48 0.03 0.03 0.00 35.00 0.00 2,053 946.32 0.03 0.03 0.00 40.00 0.00 1,469 946.16 0.03 0.03 0.00 45.00 0.00 890 946.00 0.03 0.03 0.00 50.00 0.00 320 945.68 0.03 0.03 0.00 55.00 0.00 0 945.50 0.00 0.00 0.00 60.00 0.00 0 945.50 0.00 0.00 0.00 65.00 0.00 0 945.50 0.00 0.00 0.00 70.00 0.00 0 945.50 0.00 0.00 0.00 75.00 0.00 0 945.50 0.00 0.00 0.00 80.00 0.00 0 945.50 0.00 0.00 0.00 85.00 0.00 0 945.50 0.00 0.00 0.00 90.00 0.00 0 945.50 0.00 0.00 0.00 95.00 0.00 0 945.50 0.00 0.00 0.00 100.00 0.00 0 945.50 0.00 0.00 0.00 105.00 0.00 0 945.50 0.00 0.00 0.00 110.00 0.00 0 945.50 0.00 0.00 0.00 115.00 0.00 0 945.50 0.00 0.00 0.00 120.00 0.00 0 945.50 0.00 0.00 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 99HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Subcatchment 14S: DA:P1 Runoff = 7.61 cfs @ 12.08 hrs, Volume= 0.520 af, Depth= 6.23" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Atlas 14 24-hr S0 100-yr Rainfall=7.30" Area (ac) CN Description * 0.800 98 0.200 61 >75% Grass cover, Good, HSG B 1.000 91 Weighted Average 0.200 20.00% Pervious Area 0.800 80.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Subcatchment 14S: DA:P1 Runoff Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 8 7 6 5 4 3 2 1 0 Atlas 14 24-hr S0 100-yr Rainfall=7.30" Runoff Area=1.000 ac Runoff Volume=0.520 af Runoff Depth=6.23" Tc=10.0 min CN=91 7.61 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 100HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 14S: DA:P1 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 2.00 0.05 0.00 0.00 4.00 0.12 0.00 0.00 6.00 0.20 0.00 0.00 8.00 0.39 0.03 0.03 10.00 0.84 0.25 0.22 12.00 4.03 3.04 4.70 14.00 6.47 5.41 0.38 16.00 6.91 5.85 0.12 18.00 7.10 6.04 0.08 20.00 7.18 6.12 0.04 22.00 7.25 6.18 0.03 24.00 7.30 6.23 0.02 26.00 7.30 6.23 0.00 28.00 7.30 6.23 0.00 30.00 7.30 6.23 0.00 32.00 7.30 6.23 0.00 34.00 7.30 6.23 0.00 36.00 7.30 6.23 0.00 38.00 7.30 6.23 0.00 40.00 7.30 6.23 0.00 42.00 7.30 6.23 0.00 44.00 7.30 6.23 0.00 46.00 7.30 6.23 0.00 48.00 7.30 6.23 0.00 50.00 7.30 6.23 0.00 52.00 7.30 6.23 0.00 54.00 7.30 6.23 0.00 56.00 7.30 6.23 0.00 58.00 7.30 6.23 0.00 60.00 7.30 6.23 0.00 62.00 7.30 6.23 0.00 64.00 7.30 6.23 0.00 66.00 7.30 6.23 0.00 68.00 7.30 6.23 0.00 70.00 7.30 6.23 0.00 72.00 7.30 6.23 0.00 74.00 7.30 6.23 0.00 76.00 7.30 6.23 0.00 78.00 7.30 6.23 0.00 80.00 7.30 6.23 0.00 82.00 7.30 6.23 0.00 84.00 7.30 6.23 0.00 86.00 7.30 6.23 0.00 88.00 7.30 6.23 0.00 90.00 7.30 6.23 0.00 92.00 7.30 6.23 0.00 94.00 7.30 6.23 0.00 96.00 7.30 6.23 0.00 98.00 7.30 6.23 0.00 100.00 7.30 6.23 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 102.00 7.30 6.23 0.00 104.00 7.30 6.23 0.00 106.00 7.30 6.23 0.00 108.00 7.30 6.23 0.00 110.00 7.30 6.23 0.00 112.00 7.30 6.23 0.00 114.00 7.30 6.23 0.00 116.00 7.30 6.23 0.00 118.00 7.30 6.23 0.00 120.00 7.30 6.23 0.00 PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 101HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Summary for Link 15L: Proposed Treatment Inflow Area = 2.600 ac, 76.92% Impervious, Inflow Depth = 4.67" for 100-yr event Inflow = 13.39 cfs @ 12.19 hrs, Volume= 1.011 af Primary = 13.39 cfs @ 12.19 hrs, Volume= 1.011 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.01 hrs Link 15L: Proposed Treatment Inflow Primary Hydrograph Time (hours) 12011511010510095908580757065605550454035302520151050 Fl o w ( c f s ) 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=2.600 ac 13.39 cfs 13.39 cfs PROPOSED IMPROVEMENTS Atlas 14 24-hr S0 100-yr Rainfall=7.30"04.LaMettry - 061815 Printed 6/18/2015Prepared by Sathre-Bergquist, Inc. Page 102HydroCAD® 10.00-13 s/n 03665 © 2014 HydroCAD Software Solutions LLC Hydrograph for Link 15L: Proposed Treatment Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 0.00 0.00 0.00 0.00 2.00 0.00 0.00 0.00 4.00 0.00 0.00 0.00 6.00 0.00 0.00 0.00 8.00 0.00 0.00 0.00 10.00 0.00 0.00 0.00 12.00 6.10 0.00 6.10 14.00 1.10 0.00 1.10 16.00 0.27 0.00 0.27 18.00 0.14 0.00 0.14 20.00 0.02 0.00 0.02 22.00 0.00 0.00 0.00 24.00 0.00 0.00 0.00 26.00 0.00 0.00 0.00 28.00 0.00 0.00 0.00 30.00 0.00 0.00 0.00 32.00 0.00 0.00 0.00 34.00 0.00 0.00 0.00 36.00 0.00 0.00 0.00 38.00 0.00 0.00 0.00 40.00 0.00 0.00 0.00 42.00 0.00 0.00 0.00 44.00 0.00 0.00 0.00 46.00 0.00 0.00 0.00 48.00 0.00 0.00 0.00 50.00 0.00 0.00 0.00 52.00 0.00 0.00 0.00 54.00 0.00 0.00 0.00 56.00 0.00 0.00 0.00 58.00 0.00 0.00 0.00 60.00 0.00 0.00 0.00 62.00 0.00 0.00 0.00 64.00 0.00 0.00 0.00 66.00 0.00 0.00 0.00 68.00 0.00 0.00 0.00 70.00 0.00 0.00 0.00 72.00 0.00 0.00 0.00 74.00 0.00 0.00 0.00 76.00 0.00 0.00 0.00 78.00 0.00 0.00 0.00 80.00 0.00 0.00 0.00 82.00 0.00 0.00 0.00 84.00 0.00 0.00 0.00 86.00 0.00 0.00 0.00 88.00 0.00 0.00 0.00 90.00 0.00 0.00 0.00 92.00 0.00 0.00 0.00 94.00 0.00 0.00 0.00 96.00 0.00 0.00 0.00 98.00 0.00 0.00 0.00 100.00 0.00 0.00 0.00 Time (hours) Inflow (cfs) Elevation (feet) Primary (cfs) 102.00 0.00 0.00 0.00 104.00 0.00 0.00 0.00 106.00 0.00 0.00 0.00 108.00 0.00 0.00 0.00 110.00 0.00 0.00 0.00 112.00 0.00 0.00 0.00 114.00 0.00 0.00 0.00 116.00 0.00 0.00 0.00 118.00 0.00 0.00 0.00 120.00 0.00 0.00 0.00