Loading...
HomeMy WebLinkAboutDrainage Calcs i)'S .0\ E30L-TOf'J & I'v1E:f'JI<, If'JC. Consulting Engineers & Surveyors 1515 East Highway 13 · Burnsville, MN 55337-2917 Phone (952) 890-0509. FAX (952) 890-8065 April 6, 2005 Mr. Larry Poppler, P.E. Assistant City Engineer 16200 Eagle Creek Ave, SE Prior Lake, MN 55372-1714 Re: City Project No. 05-01 PLSL WD Pennit Review BMI Project No. T16.21543 Dear Larry: Enclosed please find one copy each of the existing and proposed HydroCAD models for the above referenced project. The comments in the March 31, 2005 memo to Ed Matthiesen from Chris Meehan have been addressed as follows: 1. The outlet invert ofMH 16 in HydroCAD has been changed to 936.85. 2. The outlet invert ofMH 5 in HydroCAD has been changed to 932.72. 3. It is my understanding that you have already addressed this item. 4. All starting elevations of the ponds that represent manholes in HydroCAD have been revised to match the outlet inverts. The existing and proposed discharge rates for the 2, 10, and 100 year events are unchanged from the original submittal. Please contact me at (952) 890-0509 if you have any questions, comments, or need additional infonnation. Sincerely, BOLTON & MENK, INC. ", Kent Louwagie, E.I.T. Design Engineer Ene. cc: Prior Lake Spring Lake Watershed District Marcus Thomas, BMI F:'-Civil\PlAK\Tl621543\040605 Watershed Comments Response.doc MANKATO, MN · FAIRMONT, MN · SLEEPY EYE, MN · BURNSVILLE, MN · WILLMAR, MN · CHASKA, MN · AMES, IA www.bolton-menk.com An Equal Opportunity Employer ./ ;t_.;..1 M ^ ~DiICh@ ~ Cove Int ditch M Centennial Local Lowland B~~ Candy Cove North Regional Pond Drainage Diagram for T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. 4/6/2005 HydroCAD@7.00 sin 002276 @ 1986-2003 Applied Microcomputer Systems I..'" T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 2 year Rainfall=2.80" Page 2 4/6/2005 Time span=0.OO-24.00 hrs, dt=O.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+ Trans method - Pond routing by Stor-Ind method Subcatchment 1 S: Centennial Runoff Area=99,000 sf Runoff Depth=1.56" Flow Length=460' Tc=18.8 min CN=87 Runoff=4.08 cfs 0.295 af Subcatchment 3S: Candy Cove North Runoff Area=1 01,480 sf Runoff Depth=1. 79" Flow Length=790' Tc=18.8 min CN=90 Runoff=4.78 cts 0.348 af Subcatchment 48: Candy Cove South Runoff Area=53, 750 sf Runoff Depth=1.80" Flow Length=890' Tc=10.2 min CN=90 Runoff=3.29 cts 0.185 af Pond 1 P: Local Lowland Peak Elev=937.64' Storage=0.295 af Inflow=4.08 cfs 0.295 at Outflow=O.OO cts 0.000 af Pond 2P: TH 13 ditch Peak Elev=920.00' Storage=O ct Inflow=O.OO cfs 0.000 at Primary=O.OO cts 0.000 at Secondary=O.OO cfs 0.000 at Outflow=O.OO cts 0.000 af Pond 3P: TH 13 Ditch @ Candy Cove Int Peak Elev=930.67' Storage=0.348 at Inflow=4.78 cfs 0.348 at Outtlow=O.OO cts 0.000 at Pond4P:Reg~naIPond Peak Elev=924.20' Storage=0.185 at Inflow=3.29 cfs 0.185 at Outflow=O.OO cfs 0.000 af Total Runoff Area = 5.836 ac Runoff Volume = 0.828 af Average Runoff Depth = 1.70" ..' T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 2 year Rainfal/=2.80" Page 3 4/6/2005 Runoff = 5ubcatchment 15: Centennial 4.08 cfs @ 12.11 hrs, Volume= 0.295 af, Depth= 1.56" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 year Rainfall=2.80" Area (sf) 15,000 84,000 99,000 CN Description 98 Paved roads wlcurbs & sewers 85 1/2 acre lots, 25% imp, HSG D 87 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.9 280 0.0700 5.4 Shallow Concentrated Flow, roadside Paved Kv= 20.3 fps 17.9 180 0.1200 0.2 Sheet Flow, hillside Woods: Light underbrush n= 0.400 P2= 2.80" 18.8 460 Total Runoff = 5ubcatchment 35: Candy Cove North 4.78 cfs @ 12.11 hrs, Volume= 0.348 af, Depth= 1.79" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 year Rainfall=2.80" Area (sf) 35,180 66,300 101,480 CN Description 98 Paved parking & roofs 85 1/2 acre lots, 25% imp, HSG D 90 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.7 300 0.0200 2.9 Shallow Concentrated Flow, 300' @ 2% Paved Kv= 20.3 fps 0.5 150 0.0550 4.8 Shallow Concentrated Flow, 200' @ 5.5% Paved Kv= 20.3 fps 0.8 200 0.0400 4.1 Shallow Concentrated Flow, 200' @ 4% Paved Kv= 20.3 fps 15.8 140 0.1000 0.1 Sheet Flow, Hillside Woods: Light underbrush n= 0.400 P2= 2.80" 18.8 790 Total T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Runoff Type /I 24-hr 2 year Rainfal/=2.80" Page 4 4/6/2005 Subcatchment 4s: Candy Cove South = 3.29 cfs @ 12.01 hrs, Volume= 0.185 af, Depth= 1.80" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 year Rainfall=2.80" Area (sf) 30,400 23,350 53,750 CN Description 98 Paved parking & roofs 80 > 75% Grass cover, Good, HSG D 90 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftIft) (ftIsec) (cfs) 2.8 300 0.0080 1.8 Shallow Concentrated Flow, curb Paved Kv= 20.3 fps 1.6 500 0.0700 5.4 Shallow Concentrated Flow, 500' @ 7% Paved Kv= 20.3 fps 5.8 90 0.0700 0.3 Sheet Flow, Hillside Grass: Short n= 0.150 P2= 2.80" 10.2 890 Total Inflow Area = Inflow = Outflow = Primary = Pond 1 P: Local Lowland 2.273 ac, Inflow Depth = 1.56" 4.08 cfs @ 12.11 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 2 year event 0.295 af 0.000 af, Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 937.64' @ 24.00 hrs Surf.Area= 0.230 ac Storage= 0.295 af Plug-Flow detention time= (not calculated) Center-of-Mass det. time= (not calculated) # 1 Invert 936.00' Elevation (feet) 936.00 938.00 940.00 942.00 # Routing 1 Primary Avail.Storage Storage Description 2.882 af Custom Stage Data (Prismatic) Listed below Surf.Area (acres) 0.101 0.258 0.640 0.984 Inc.Store (acre-feet) 0.000 0.359 0.899 1.625 Cum. Store ( acre-feet) 0.000 0.359 1.258 2.882 I nvert Outlet Devices 942.00' 30.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00s/n 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 2 year Rainfal/=2.80" Page 5 4/6/2005 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=936.00' (Free Discharge) L1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) Inflow Area = Inflow = Outflow = Primary = Secondary = Pond 2P: TH 13 ditch 4.602 ac, Inflow Depth = 0.00" 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 2 year event 0.000 af 0.000 af, Atten= 0%, Lag= 0.0 min 0.000 af 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 920.00' @ 0.00 hrs Surf.Area= 3,420 sf Storage= 0 cf Plug-Flow detention time= (not calculated) Center-of-Mass del. time= (not calculated) # 1 Invert 920.00' Avail.Storage Storage Description 40,740 ct Custom Stage Data (Prismatic) Listed below Elevation Surf.Area (feet) ( sq-ft) 920.00 3,420 922.00 5,500 924.00 7,870 926.00 10,580 # Routing Invert 1 Primary 914.93' 2 Secondary 922.00' Inc.Store (cubic-feet) o 8,920 13,370 18,450 Cum.Store (cubic-feet) o 8,920 22,290 40,740 Outlet Devices 24.0" x 30.0'long Culvert RCP, mitered to conform to fill, Ke= 0.700 Outlet Invert= 914.11' S= 0.0273'1' n= 0.013 Cc= 0.900 12.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coet. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=920.00' (Free Discharge) L1=Culvert (Passes 0.00 cfs of 26.93 cfs potential flow) Secondary OutFlow Max=O.OO cfs @ 0.00 hrs HW=920.00' (Free Discharge) L2=Broad-Crested Rectangular Weir (Controls 0.00 cfs) Inflow Area = Inflow = Outflow = Primary = Pond 3P: TH 13 Ditch @ Candy Cove Int 2.330 ac, Inflow Depth = 1.79" 4.78 cfs @ 12.11 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 2 year event 0.348 af 0.000 af, Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 930.67' @ 24.00 hrs Surf.Area= 0.177 ac Storage= 0.348 af Plug-Flow detention time= (not calculated) Center-of-Mass del. time= (not calculated) T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems # 1 Invert 928.00' Elevation (feet) 928.00 930.00 932.00 933.00 934.00 936.00 # Routing 1 Primary Type /I 24-hr 2 year Rainfal/=2.80" Page 6 4/6/2005 Avail.Storage Storage Description 2.053 af Custom Stage Data (Prismatic) listed below Surf.Area (acres) 0.072 0.146 0.239 0.302 0.370 0.475 Inc.Store (acre-feet) 0.000 0.218 0.385 0.270 0.336 0.844 Cum.Store (acre-feet) 0.000 0.218 0.603 0.874 1.209 2.053 I nvert Outlet Devices 934.00' 30.0'long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=928.00' (Free Discharge) L1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) I nflow Area = Inflow = Outflow = Primary = Pond 4P: Regional Pond 1.234 ac, Inflow Depth = 1.80" 3.29 cfs @ 12.01 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 2 year event 0.185 af 0.000 af, Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 924.20' @ 24.00 hrs Surf.Area= 0.866 ac Storage= 0.185 af Plug-Flow detention time= (not calculated) Center-of-Mass del. time= (not calculated) # Invert Avail.Storage Storage Description 1 924.00' 15.027 af Custom Stage Data (Prismatic) listed below Elevation (feet) 924.00 926.00 928.00 930.00 932.00 934.00 # Routing 1 Primary Surf.Area (acres) 0.849 1.015 1.178 1.423 2.098 2.750 Inc.Store (acre-feet) 0.000 1.864 2.192 2.601 3.521 4.848 Cum.Store (acre-feet) 0.000 1.864 4.056 6.657 10.179 15.027 Invert Outlet Devices 932.00' 30.0'long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sin 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 2 year Rainfal/=2.80" Page 7 4/6/2005 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=924.00' (Free Discharge) 't-1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type II 24-hr 10 year Rainfal/=4.20" Page 8 4/6/2005 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+ Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Centennial Runoff Area=99,000 sf Runoff Depth=2.81" Flow Length=460' Tc=18.8 min CN=87 Runoff=7.28 cfs 0.532 af Subcatchment 3S: Candy Cove North Runoff Area= 1 01,480 sf Runoff Depth=3.1 0" Flow Length=790' Tc=18.8 min CN=90 Runoff=8.11 cfs 0.601 af Subcatchment 4s: Candy Cove South Runoff Area=53,750 sf Runoff Depth=3.1 0" Flow Length=890' Tc=10.2 min CN=90 Runoff=5.54 cfs 0.319 af Pond 1 P: Local Lowland Peak Elev=938.39' Storage=0.532 af Inflow=7.28 cfs 0.532 af Outflow=O.OO cfs 0.000 af Pond 2P: TH 13 ditch Peak Elev=920.00' Storage=O cf Inflow=O.OO cfs 0.000 af Primary=O.OO cfs 0.000 af Secondary=O.OO cfs 0.000 af Outflow=O.OO cfs 0.000 af Pond 3P: TH 13 Ditch @ Candy Cove Int Peak Elev=931.99' Storage=0.601 af Inflow=8.11 cfs 0.601 af Outflow=O.OO cfs 0.000 af Pond 4P: Regional Pond Peak Elev=924.34' Storage=0.319 af Inflow=5.54 cfs 0.319 af Outflow=O.OO cfs 0.000 af Total Runoff Area = 5.836 ac Runoff Volume = 1.453 af Average Runoff Depth = 2.99" T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sin 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 10 year Rainfal/=4.20" Page 9 4/6/2005 Runoff = Subcatchment 1 S: Centennial 7.28 cfs @ 12.11 hrs, Volume= 0.532 af, Depth= 2.81" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 year Rainfall=4.20" Area (sf) 15,000 84,000 99,000 CN Description 98 Paved roads w/curbs & sewers 85 1/2 acre lots, 25% imp, HSG D 87 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.9 280 0.0700 5.4 Shallow Concentrated Flow, roadside Paved Kv= 20.3 fps 17.9 180 0.1200 0.2 Sheet Flow, hillside Woods: Light underbrush n= 0.400 P2= 2.80" 18.8 460 Total Runoff = Subcatchment 3S: Candy Cove North 8.11 cfs @ 12.11 hrs, Volume= 0.601 af, Depth= 3.10" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 year Rainfall=4.20" Area (sf) 35,180 66,300 101,480 CN Description 98 Paved parking & roofs 85 1/2 acre lots, 25% imp, HSG D 90 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.7 300 0.0200 2.9 Shallow Concentrated Flow, 300' @ 2% Paved Kv= 20.3 fps 0.5 150 0.0550 4.8 Shallow Concentrated Flow, 200' @ 5.5% Paved Kv= 20.3 fps 0.8 200 0.0400 4.1 Shallow Concentrated Flow, 200' @ 4% Paved Kv= 20.3 fps 15.8 140 0.1000 0.1 Sheet Flow, Hillside Woods: Light underbrush n= 0.400 P2= 2.80" 18.8 790 Total 11621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAO@ 7.00 sin 002276 @ 1986-2003 Applied Microcomputer Systems Runoff Type /I 24-hr 10 year Rainfal/=4.20" Page 1 0 4/6/2005 Subcatchment 4s: Candy Cove South = 5.54 cfs @ 12.01 hrs, Volume= 0.319 af, Depth= 3.10" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 year Rainfall=4.20" Area (sf) 30,400 23,350 53,750 CN Description 98 Paved parking & roofs 80 > 75% Grass cover, Good, HSG D 90 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftIft) (ftIsec) (cfs) 2.8 300 0.0080 1.8 Shallow Concentrated Flow, curb Paved Kv= 20.3 fps 1.6 500 0.0700 5.4 Shallow Concentrated Flow, 500' @ 7% Paved Kv= 20.3 fps 5.8 90 0.0700 0.3 Sheet Flow, Hillside Grass: Short n= 0.150 P2= 2.80" 10.2 890 Total Inflow Area = Inflow = Outflow = Primary = Pond 1P: Local Lowland 2.273 ac, Inflow Depth = 2.81" 7.28 cfs @ 12.11 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 10 year event 0.532 af 0.000 af, Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 938.39' @ 24.00 hrs Surf.Area= 0.332 ac Storage= 0.532 af Plug-Flow detention time= (not calculated) Center-of-Mass det. time= (not calculated) # 1 Invert 936.00' Elevation . (feet) 936.00 938.00 940.00 942.00 # Routing 1 Primary Avail.Storage Storage Description 2.882 af Custom Stage Data (Prismatic) Listed below Surf.Area (acres) 0.101 0.258 0.640 0.984 Inc.Store (acre-feet) 0.000 0.359 0.899 1.625 Cum.Store (acre-feet) 0.000 0.359 1.258 2.882 Invert Outlet Devices 942.00' 30.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 , . T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAO@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 10 year Rainfal/=4.20" Page 11 4/6/2005 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=936.00' (Free Discharge) L1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) I nflow Area = Inflow = Outflow = Primary = Secondary = Pond 2P: TH 13 ditch 4.602 ac, Inflow Depth = 0.00" 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 10 year event 0.000 af 0.000 af, Atlen= 0%, Lag= 0.0 min 0.000 af 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 920.00' @ 0.00 hrs Surf.Area= 3,420 sf Storage= 0 cf Plug-Flow detention time= (not calculated) Center-of-Mass del. time= (not calculated) # 1 Invert 920.00' Avail.Storage Storage Description 40,740 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area (feet) (sq-ft) 920.00 3,420 922.00 5,500 924.00 7,870 926.00 10,580 # Routing Invert 1 Primary 914.93' 2 Secondary 922.00' Inc.Store (cubic-feet) o 8,920 13,370 18,450 Cum.Store ( cubic-feet) o 8,920 22,290 40,740 Outlet Devices 24.0" x 30.0' long Culvert RCP, mitered to conform to fill, Ke= 0.700 Outlet Invert= 914.11' S= 0.0273'{' n= 0.013 Cc= 0.900 12.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=920.00' (Free Discharge) L1=Culvert (Passes 0.00 cfs of 26.93 cfs potential flow) .t:.condary OutFlow Max=O.OO cfs @ 0.00 hrs HW=920.00' (Free Discharge) 2=Broad-Crested Rectangular Weir (Controls 0.00 cfs) Inflow Area = Inflow = Outflow = Primary = Pond 3P: TH 13 Ditch @ Candy Cove Int 2.330 ac, Inflow Depth = 3.10" 8.11 cfs @ 12.11 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 10 year event 0.601 af 0.000 af, Atlen= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 931.99' @ 24.00 hrs Surf.Area= 0.238 ac Storage= 0.601 af Plug-Flow detention time= (not calculated) Center-of-Mass del. time= (not calculated) T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 10 year Rainfal/=4.20" Page 12 4/6/2005 # 1 Invert 928.00' Elevation (feet) 928.00 930.00 932.00 933.00 934.00 936.00 # Routing 1 Primary Avail.Storage Storage Description 2.053 af Custom Stage Data (Prismatic) Listed below Surf.Area (acres) 0.072 0.146 0.239 0.302 0.370 0.475 Inc.Store (acre-feet) 0.000 0.218 0.385 0.270 0.336 0.844 Cum.Store (acre-feet) 0.000 0.218 0.603 0.874 1.209 2.053 I nvert Outlet Devices 934.00' 30.0'long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=928.00' (Free Discharge) ~1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) I nflow Area = Inflow = Outflow = Primary = Pond 4P: Regional Pond 1.234 ac, Inflow Depth = 3.10" 5.54 cfs @ 12.01 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 10 year event 0.319 af 0.000 af, Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 924.34' @ 24.00 hrs Surf.Area= 0.878 ac Storage= 0.319 af Plug-Flow detention time= (not calculated) Center-of-Mass det. time= (not calculated) # 1 Invert 924.00' Elevation (feet) 924.00 926.00 928.00 930.00 932.00 934.00 # Routing 1 Primary Avail.Storage Storage Description 15.027 af Custom Stage Data (Prismatic) Listed below Surf.Area (acres) 0.849 1.015 1.178 1.423 2.098 2.750 Inc.Store ( acre-feet) 0.000 1.864 2.192 2.601 3.521 4.848 Cum.Store (acre-feet) 0.000 1.864 4.056 6.657 10.179 15.027 Invert Outlet Devices 932.00' 30.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type" 24-hr 10 year Rainfal/=4.20" Page 13 4/6/2005 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=924.00' (Free Discharge) '--1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) " . T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 100 year Rainfal/=5.90" Page 14 4/6/2005 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+ Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Centennial Runoff Area=99,000 st Runoff Depth=4.40" Flow Length=460' Tc=18.8 min CN=87 Runoff=11.22 cts 0.834 at Subcatchment 3S: Candy Cove North Runoff Area=101,480 st Runoff Depth=4.73" Flow Length=790' Tc=18.8 min CN=90 Runoff=12.13 cts 0.919 at Subcatchment 4s: Candy Cove South Runoff Area=53,750 st Runoff Depth=4.74" Flow Length=890' Tc=10.2 min CN=90 Runoff=8.26 cts 0.487 at Pond 1 P: Local Lowland Peak Elev=939.06' Storage=0.834 at Intlow=11.22 cts 0.834 at Outflow=O.OO cts 0.000 at Pond 2P: TH 13 ditch Peak Elev=920.00' Storage=O ct Intlow=O.OO cts 0.000 at Primary=O.OO cts 0.000 at Secondary=O.OO cts 0.000 at Outflow=O.OO cts 0.000 at Pond 3P: TH 13 Ditch @ Candy Cove Int Peak Elev=933.13' Storage=0.918 at Intlow=12.13 cts 0.919 at Outtlow=O.OO cts 0.000 at Pond 4P: Regional Pond Peak Elev=924.52' Storage=0.487 at Intlow=8.26 cts 0.487 at Outtlow=O.OO cts 0.000 at Total Runoff Area = 5.836 ac Runoff Volume = 2.240 at Average Runoff Depth = 4.61" T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAO@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 100 year Rainfal/=5.90" Page 15 4/6/2005 Runoff = 5ubcatchment 15: Centennial 11.22 cfs @ 12.11 hrs, Volume= 0.834 af, Depth= 4.40" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 year Rainfall=5.90" Area (sf) 15,000 84,000 99,000 CN Description 98 Paved roads w/curbs & sewers 85 1/2 acre lots, 25% imp, HSG D 87 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs) 0.9 280 0.0700 5.4 Shallow Concentrated Flow, roadside Paved Kv= 20.3 fps 17.9 180 0.1200 0.2 Sheet Flow, hillside Woods: Light underbrush n= 0.400 P2= 2.80" 18.8 460 Total Runoff = 5ubcatchment 35: Candy Cove North 12.13 cfs @ 12.11 hrs, Volume= 0.919 af, Depth= 4.73" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 year Rainfall=5.90" Area (sf) 35,180 66,300 101,480 CN Description 98 Paved parking & roofs 85 1/2 acre lots, 25% imp, HSG D 90 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs) 1.7 300 0.0200 2.9 Shallow Concentrated Flow, 300' @ 2% Paved Kv= 20.3 fps 0.5 150 0.0550 4.8 Shallow Concentrated Flow, 200' @ 5.5% Paved Kv= 20.3 fps 0.8 200 0.0400 4.1 Shallow Concentrated Flow, 200' @ 4% Paved Kv= 20.3 fps 15.8 140 0.1000 0.1 Sheet Flow, Hillside Woods: Light underbrush n= 0.400 P2= 2.80" 18.8 790 Total T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 100 year Rainfal/=5.90" Page 16 4/6/2005 Runoff Subcatchment 4s: Candy Cove South = 8.26 cfs @ 12.01 hrs, Volume= 0.487 af, Depth= 4.74" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 year Rainfall=5.90" Area (sf) 30,400 23,350 53,750 CN Description 98 Paved parking & roofs 80 > 75% Grass cover, Good, HSG D 90 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftIft) (ftIsec) (cfs) 2.8 300 0.0080 1.8 Shallow Concentrated Flow, curb Paved Kv= 20.3 fps 1.6 500 0.0700 5.4 Shallow Concentrated Flow, 500' @ 7% Paved Kv= 20.3 fps 5.8 90 0.0700 0.3 Sheet Flow, Hillside Grass: Short n= 0.150 P2= 2.80" 10.2 890 Total Inflow Area = Inflow = Outflow = Primary = Pond 1 P: Local Lowland 2.273 ac, Inflow Depth = 4.40" 11.22 cfs @ 12.11 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 100 year event 0.834 af 0.000 af, Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 939.06' @ 24.00 hrs Surf.Area= 0.460 ac Storage= 0.834 af Plug-Flow detention time= (not calculated) Center-of-Mass det. time= (not calculated) # 1 Invert 936.00' Elevation (feet) 936.00 938.00 940.00 942.00 # Routing 1 Primary Avail.Storage Storage Description 2.882 af Custom Stage Data (Prismatic) Listed below Surf.Area ( acres) 0.101 0.258 0.640 0.984 Inc.Store (acre-feet) 0.000 0.359 0.899 1.625 Cum. Store (acre-feet) 0.000 0.359 1.258 2.882 I nvert Outlet Devices 942.00' 30.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coet. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sin 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 100 year Rainfal/=5.90" Page 17 4/6/2005 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=936.00' (Free Discharge) L1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) Inflow Area = Inflow = Outflow = Primary = Secondary = Pond 2P: TH 13 ditch 4.602 ac, Inflow Depth = 0.00" 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 100 year event 0.000 af 0.000 af, Atten= 0%, Lag= 0.0 min 0.000 af 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 920.00' @ 0.00 hrs Surf.Area= 3,420 sf Storage= 0 cf Plug-Flow detention time= (not calculated) Center-of-Mass del. time= (not calculated) # 1 Invert 920.00' Avail.Storage Storage Description 40,740 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area (feet) ( sq-ft) 920.00 3,420 922.00 5,500 924.00 7,870 926.00 10,580 # Routing Invert 1 Primary 914.93' 2 Secondary 922.00' Inc.Store (cubic-feet) o 8,920 13,370 18,450 Cum.Store (cubic-feet) o 8,920 22,290 40,740 Outlet Devices 24.0" x 30.0'long Culvert RCP, mitered to conform to fill, Ke= 0.700 Outlet Invert= 914.11' S= 0.0273 'I' n= 0.013 Cc= 0.900 12.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coet. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=920.00' (Free Discharge) L1=Culvert (Passes 0.00 cfs of 26.93 cfs potential flow) ~COndary OutFlow Max=O.OO cfs @ 0.00 hrs HW=920.00' (Free Discharge) 2=Broad-Crested Rectangular Weir (Controls 0.00 cfs) I nflow Area = Inflow = Outflow = Primary = Pond 3P: TH 13 Ditch @ Candy Cove Int 2.330 ac, Inflow Depth = 4.73" 12.13 cfs @ 12.11 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 100 year event 0.919 af 0.000 af, Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 933.13' @ 24.00 hrs Surf.Area= 0.311 ac Storage= 0.918 af Plug-Flow detention time= (not calculated) Center-of-Mass del. time= (not calculated) 11621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 100 year Rainfal/=5.90" Page 18 4/6/2005 # 1 Invert 928.00' Elevation (feet) 928.00 930.00 932.00 933.00 934.00 936.00 # Routing 1 Primary Avail.Storage Storage Description 2.053 af Custom Stage Data (Prismatic) Listed below Surf.Area (acres) 0.072 0.146 0.239 0.302 0.370 0.475 Inc.Store ( acre-feet) 0.000 0.218 0.385 0.270 0.336 0.844 Cum.Store (acre-feet) 0.000 0.218 0.603 0.874 1.209 2.053 Invert Outlet Devices 934.00' 30.0'long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=928.00' (Free Discharge) L1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) Inflow Area = Inflow = Outflow = Primary = Pond 4P: Regional Pond 1.234 ac, Inflow Depth = 4.74" 8.26 cfs @ 12.01 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 100 year event 0.487 af 0.000 af, Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 924.52' @ 24.00 hrs Surf.Area= 0.893 ac Storage= 0.487 af Plug-Flow detention time= (not calculated) Center-of-Mass det. time= (not calculated) # 1 Invert 924.00' Elevation (feet) 924.00 926.00 928.00 930.00 932.00 934.00 # Routing 1 Primary Avail.Storage Storage Description 15.027 af Custom Stage Data (Prismatic) Listed below Surf.Area (acres) 0.849 1.015 1.178 1.423 2.098 2.750 Inc.Store (acre-feet) 0.000 1.864 2.192 2.601 3.521 4.848 Cum.Store ( acre-feet) 0.000 1.864 4.056 6.657 10.179 15.027 Invert Outlet Devices 932.00' 30.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coet. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 , . T1621543 Existing 040505 Prepared by Bolton & Menk, Inc. HydroCAO@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 100 year Rainfal/=5.90" Page 19 4/6/2005 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=924.00' (Free Discharge) 't-1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) : , ~ ^ ~ Ditllf@candY ~ COVi Int ~~ M~ ..- ^ ~..-"- ~ MH5 Local Lowland MH16 Centennial B~~ Candy Cove North Candy cie South M MH10 Regional Pond Drainage Diagram for T1621543 Proposed 040505 Prepared by Bolton & Mank, Inc. 4/6/2005 HydroCAD@7.00 sin 002276 @ 1986-2003 Applied Microcomputer Systems T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 2 year Rainfal/=2.80" Page 2 4/6/2005 Time span=0.OO-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+ Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Centennial Runoff Area=99,OOO sf Runoff Depth=1.56" Flow Length=460' Tc=18.7 min CN=87 Runoff=4.09 cfs 0.295 af Subcatchment 3S: Candy Cove North Runoff Area=101 ,480 sf Runoff Depth=1.79" Flow Length=1,020' Tc=17.6 min CN=90 Runoff=4.95 cfs 0.348 af Subcatchment 4s: Candy Cove South Runoff Area=53, 750 sf Runoff Depth=1.97" Flow Length=890' Tc=9.0 min CN=92 Runoff=3.71 cfs 0.203 af Pond 1 P: Local Lowland Peak Elev=936.00' Storage=O.OOO af Inflow=O.OO cfs 0.000 af Outflow=O.OO cfs 0.000 af Pond 2P: TH 13 ditch Peak Elev=920.01' Storage=40 cf Inflow=4.09 cfs 0.293 af Primary=4.09 cfs 0.293 af Secondary=O.OO cfs 0.000 af Outflow=4.09 cfs 0.293 af Pond 3P: TH 13 Ditch @ Candy Cove Int Peak Elev=930.66' Storage=0.346 af Inflow=4.95 cfs 0.346 af Outflow=O.OO cfs 0.000 af Pond 4P: Regional Pond Peak Elev=924.22' Storage=0.202 af Inflow=3.71 cfs 0.202 af Outflow=O.OO cfs 0.000 af Pond 5P: MH 5 Peak Elev=933.95' Storage=120 cf Inflow=4.09 cfs 0.295 af Primary=4.09 cfs 0.293 af Secondary=O.OO cfs 0.000 af Outflow=4.09 cfs 0.293 af Pond 6P: MH 16 Peak Elev=937.86' Storage=140 cf Inflow=4.95 cfs 0.348 af 15.0" x 60.0' Culvert Outflow=4.95 cfs 0.346 af Pond 7P: MH 10 Peak Elev=949.16' Storage=38 cf Inflow=3.71 cfs 0.203 af 15.0" x 40.0' Culvert Outflow=3.71 cfs 0.202 af Total Runoff Area = 5.836 ac Runoff Volume = 0.846 af Average Runoff Depth = 1.74" T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Runoff = Type" 24-hr 2 year Rainfal/=2.80" Page 3 4/6/2005 Subcatchment 15: Centennial 4.09 cfs @ 12.11 hrs, Volume= 0.295 af, Depth= 1.56" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 year Rainfall=2.80" Area (sf) 16,650 82,350 99,000 CN Description 98 Paved roads w/curbs & sewers 85 1/2 acre lots, 25% imp, HSG D 87 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs) 0.8 280 0.0800 5.7 Shallow Concentrated Flow, Curb Flow Paved Kv= 20.3 fps 17.9 180 0.1200 0.2 Sheet Flow, hillside Woods: Light underbrush n= 0.400 P2= 2.80" 18.7 460 Total Runoff = Subcatchment 35: Candy Cove North 4.95 cfs @ 12.10 hrs, Volume= 0.348 af, Depth= 1.79" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 year Rainfall=2.80" Area (sf) 40,740 60,740 101,480 CN Description 98 Paved parking & roofs 85 1/2 acre lots, 25% imp, HSG D 90 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs) 1.2 730 0.0300 9.9 12.12 Circular Channel (pipe), storm Diam= 15.0" Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.012 0.6 150 0.0400 4.1 Shallow Concentrated Flow, curb Paved Kv= 20.3 fps 15.8 140 0.1000 0.1 Sheet Flow, hillside Woods: Light underbrush n= 0.400 P2= 2.80" 17.6 1,020 Total Runoff = Subcatchment 4s: Candy Cove South 3.71 cfs @ 12.00 hrs, Volume= 0.203 af, Depth= 1.97" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 year Rainfall=2.80" , . T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Area (sf) 36,160 17,590 53,750 Type /I 24-hr 2 year Rainfall=2.80" Page 4 4/6/2005 CN Description 98 Paved parking & roofs 80 > 75% Grass cover, Good, HSG D 92 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs) 1.6 300 0.0030 3.1 3.83 Circular Channel (pipe), CB 12 to MH 10 Diam= 15.0" Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.012 1.6 500 0.0700 5.4 Shallow Concentrated Flow, curb Paved Kv= 20.3 fps 5.8 90 0.0700 0.3 Sheet Flow, hillside Grass: Short n= 0.150 P2= 2.80" 9.0 890 Total Inflow Outflow Primary Pond 1 P: Local Lowland = 0.00 cfs @ 0.00 cfs @ 0.00 cfs @ 0.000 af 0.000 af, Atten= 0%, Lag= 0.0 min 0.000 af 0.00 hrs, Volume= 0.00 hrs, Volume= 0.00 hrs, Volume= = = Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 936.00' @ 0.00 hrs Surf.Area= 0.101 ac Storage= 0.000 af Plug-Flow detention time= (not calculated) Center-of-Mass det. time= (not calculated) # 1 Invert 936.00' Elevation (feet) 936.00 938.00 940.00 942.00 # Routing 1 Primary Avail.Storage Storage Description 2.882 af Custom Stage Data (Prismatic) Listed below Surf.Area (acres) 0.101 0.258 0.640 0.984 Inc.Store (acre-feet) 0.000 0.359 0.899 1.625 Cum.Store ( acre-feet) 0.000 0.359 1.258 2.882 I nvert Outlet Devices 942.00' 30.0'long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=936.00' (Free Discharge) L1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) Pond 2P: TH 13 ditch , ' T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAO@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Inflow Area = Inflow = Outflow = Primary = Secondary = Type /I 24-hr 2 year Rainfall=2.80" Page 5 4/6/2005 4.602 ac, Inflow Depth = 0.76" 4.09 cfs @ 12.11 hrs, Volume= 4.09 cfs @ 12.12 hrs, Volume= 4.09 cfs @ 12.12 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 2 year event 0.293 af 0.293 af, Atten= 0%, Lag= 0.2 min 0.293 af 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 920.01' @ 12.12 hrs Surf.Area= 3,429 sf Storage= 40 cf Plug-Flow detention time= 0.2 min calculated for 0.293 af (100% of inflow) Center-of-Mass det. time= 0.1 min ( 832.8 - 832.7 ) # 1 Invert 920.00' Avail.Storage Storage Description 40,740 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area (feet) ( sq-ft) 920.00 3,420 922.00 5,500 924.00 7,870 926.00 10,580 # Routing Invert 1 Primary 914.93' 2 Secondary 922.00' Inc. Store (cubic-feet) o 8,920 13,370 18,450 Cum.Store (cubic-feet) o 8,920 22,290 40,740 Outlet Devices 24.0" x 30.0' long Culvert RCP, mitered to conform to fill, Ke= 0.700 Outlet Invert= 914.11' S= 0.0273'1' n= 0.013 Cc= 0.900 12.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (teet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coet. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=26.96 cfs @ 12.12 hrs HW=920.01' (Free Discharge) L1=Culvert (Inlet Controls 26.96 cfs @ 8.6 fps) Secondary OutFlow Max=O.OO cfs @ 0.00 hrs HW=920.00' (Free Discharge) L2=Broad-Crested Rectangular Weir (Controls 0.00 cfs) Inflow Area = Inflow = Outflow = Primary = Pond 3P: TH 13 Ditch @ Candy Cove Int 2.330 ac, Inflow Depth = 1.78" 4.95 cfs @ 12.10 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 2 year event 0.346 af 0.000 af, Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 930.66' @ 24.00 hrs Surf.Area= 0.177 ac Storage= 0.346 af Plug-Flow detention time= (not calculated) Center-of-Mass det. time= (not calculated) # Invert Avail.Storage Storage Description 1 928.00' 2.053 af Custom Stage Data (Prismatic) Listed below 11621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sin 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 2 year Rainfal/=2.80" Page 6 4/6/2005 Elevation (feet) 928.00 930.00 932.00 933.00 934.00 936.00 # Routing 1 Primary Surf.Area ( acres) 0.072 0.146 0.239 0.302 0.370 0.475 Inc.Store (acre-feet) 0.000 0.218 0.385 0.270 0.336 0.844 Cum.Store (acre-feet) 0.000 0.218 0.603 0.874 1.209 2.053 I nvert Outlet Devices 934.00' 30.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coet. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=928.00' (Free Discharge) 't-1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) Inflow Area = Inflow = Outflow = Primary = Pond 4P: Regional Pond 1.234 ac, Inflow Depth = 1.97" 3.71 cfs @ 12.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 2 year event 0.202 af 0.000 af, Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 924.22' @ 24.00 hrs Surf.Area= 0.867 ac Storage= 0.202 af Plug-Flow detention time= (not calculated) Center-of-Mass del. time= (not calculated) # 1 Invert 924.00' Elevation (feet) 924.00 926.00 928.00 930.00 932.00 934.00 # Routing 1 Primary Avail.Storage Storage Description 15.027 af Custom Stage Data (Prismatic) Listed below Surf.Area ( acres) 0.849 1.015 1.178 1.423 2.098 2.750 Inc.Store (acre-feet) 0.000 1.864 2.192 2.601 3.521 4.848 Cum.Store (acre-feet) 0.000 1.864 4.056 6.657 10.179 15.027 Invert Outlet Devices 932.00' 30.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=924.00' (Free Discharge) 't-1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 2 year Rainfal/=2.80" Page 7 4/6/2005 Inflow Area = Inflow = Outflow = Primary = Secondary = Pond 5P: MH 5 2.273 ac, Inflow Depth = 1.56" 4.09 cfs @ 12.11 hrs, Volume= 4.09 cfs @ 12.11 hrs, Volume= 4.09 cfs @ 12.11 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 2 year event 0.295 af 0.293 af, Atten= 0%, Lag= 0.2 min 0.293 af 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 933.95' @ 12.11 hrs Surf.Area= 28 sf Storage= 120 cf Plug-Flow detention time= 6.3 min calculated for 0.293 af (99% of inflow) Center-of-Mass del. time= 2.2 min ( 832.7- 830.5 ) # 1 Invert 929.66' Avail.Storage Storage Description 362 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area (feet) (sq-ft) 929.66 28 932.70 28 937.40 28 937.75 800 # Routing Invert 1 Primary 932.72' 2 Secondary 937.75' Inc.Store ( cubic-feet) o 85 132 145 Cum.Store (cubic-feet) o 85 217 362 Outlet Devices 15.0" x 286.0' long Culvert RCP, mitered to conform to fill, Ke= 0.700 Outlet Invert= 929.66' S= 0.0107 'I' n= 0.013 Cc= 0.900 10.0' long x 3.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 Coef. (English) 2.44 2.58 2.68 2.67 2.65 2.64 2.64 2.68 2.68 2.72 2.81 2.92 2.97 3.07 3.32 Primary OutFlow Max=4.04 cfs @ 12.11 hrs HW=933.94' (Free Discharge) 't.-1=Culvert (Inlet Controls 4.04 cfs @ 3.3 fps) Secondary OutFlow Max=O.OO cfs @ 0.00 hrs HW=929.66' (Free Discharge) 't.-2=Broad-Crested Rectangular Weir (Controls 0.00 cfs) I nflow Area = Inflow = Outflow = Primary = Pond 6P: MH 16 2.330 ac, Inflow Depth = 1.79" 4.95 cfs @ 12.10 hrs, Volume= 4.95 cfs @ 12.10 hrs, Volume= 4.95 cfs @ 12.10 hrs, Volume= for 2 year event 0.348 af 0.346 af, Atten= 0%, Lag= 0.1 min 0.346 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 937.86' @ 12.10 hrs Surf.Area= 28 sf Storage= 140 cf Plug-Flow detention time= 7.3 min calculated for 0.346 af (99% of inflow) Center-of-Mass del. time= 2.8 min ( 820.2 - 817.4 ) 11621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems # 1 Invert 932.85' Elevation (feet) 932.85 936.45 941.09 # Routing 1 Primary Type /I 24-hr 2 year Rainfal/=2.80" Page 8 4/6/2005 Avail.Storage Storage Description 231 cf Custom Stage Data (Prismatic) Listed below Surf.Area (sq-ft) 28 28 28 Inc.Store (cubic-feet) o 101 130 Cum.Store (cubic-feet) o 101 231 Invert Outlet Devices 936.85' 15.0" x 60.0' long Culvert RCP, rounded edge headwall, Ke= 0.100 Outlet Invert= 932.85' S= 0.0667 'I' n= 0.013 Cc= 0.900 Primary OutFlow Max=4.94 cfs @ 12.10 hrs HW=937.86' (Free Discharge) 'L.1=Culvert (Inlet Controls 4.94 cfs @ 4.7 fps) Inflow Area = Inflow = Outflow = Primary = Pond 7P: MH 10 1.234 ac, Inflow Depth = 1.97" 3.71 cfs @ 12.00 hrs, Volume= 3.71 cfs @ 12.00 hrs, Volume= 3.71 cfs @ 12.00 hrs, Volume= for 2 year event 0.203 af 0.202 af, Atten= 0%, Lag= 0.1 min 0.202 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 949.16' @ 12.00 hrs Surf.Area= 28 sf Storage= 38 cf Plug-Flow detention time= 1.2 min calculated for 0.202 af (100% of inflow) Center-of-Mass del. time= 0.6 min ( 801.9 - 801.2 ) # 1 Invert 947.81' Elevation (feet) 947.81 948.00 951.90 # Routing 1 Primary Avail.Storage Storage Description 115 cf Custom Stage Data (Prismatic) Listed below Surf.Area (sq-ft) 28 28 28 Inc.Store (cubic-feet) o 5 109 Cum.Store (cubic-feet) o 5 115 Invert Outlet Devices 948.01' 15.0" x 40.0' long Culvert RCP, rounded edge headwall, Ke= 0.100 Outlet Invert= 947.81' S= 0.0050 'I' n= 0.013 Cc= 0.900 Primary OutFlow Max=3.69 cfs @ 12.00 hrs HW=949.15' (Free Discharge) 'L.1=Culvert (Barrel Controls 3.69 cfs @ 4.1 fps) T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type" 24-hr 10 year Rainfal/=4.20" Page 9 4/6/2005 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+ Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Centennial Runoff Area=99,000 st Runoff Depth=2.81" Flow Length=460' Tc=18.7 min CN=87 Runoff=7.30 cts 0.532 at Subcatchment 3S: Candy Cove North Runoff Area=1 01,480 st Runoff Depth=3.1 0" Flow Length=1 ,020' Tc=17.6 min CN=90 Runoff=8.38 cts 0.602 at Subcatchment 45: Candy Cove South Runoff Area=53,750 st Runoff Depth=3.31" Flow Length=890' Tc=9.0 min CN=92 Runoff=6.05 cts 0.340 at Pond 1P: Local Lowland Peak Elev=936.00' Storage=O.OOO at Inflow=O.OO cts 0.000 at Outtlow=O.OO cts 0.000 at Pond 2P: TH 13 ditch Peak Elev=920.02' Storage=72 cf Intlow=7.26 cts 0.530 at Primary=7.27 cts 0.530 at Secondary=O.OO cts 0.000 at Outflow=7.27 cts 0.530 at Pond 3P: TH 13 Ditch @ Candy Cove Int Peak Elev=931.98' Storage=0.599 at Intlow=8.38 cts 0.599 at Outflow=O.OO cts 0.000 at Pond 4P: Regional Pond Peak Elev=924.36' Storage=0.340 at Intlow=6.01 cts 0.340 at Outflow=O.OO cts 0.000 at Pond 5P: MH 5 Peak Elev=935.43' Storage=162 ct Intlow=7.30 cts 0.532 at Primary=7.26 cts 0.530 at Secondary=O.OO cts 0.000 at Outtlow=7.26 cts 0.530 at Pond 6P: MH 16 Peak Elev=938.56' Storage=160 ct Intlow=8.38 cfs 0.602 at 15.0" x 60.0' Culvert Outtlow=8.38 cts 0.599 at Pond 7P: MH 10 Peak Elev=949.82' Storage=56 ct Intlow=6.05 cts 0.340 at 15.0" x 40.0' Culvert Outtlow=6.01 cts 0.340 at Total Runoff Area = 5.836 ac RUl;1off Volume = 1.474 af Average Runoff Depth = 3.03" 11621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAO@7.00 sin 002276 @ 1986-2003 Applied Microcomputer Systems Runoff = Type /I 24-hr 10 year Rainfal/=4.20" Page 1 0 4/6/2005 Subcatchment 15: Centennial 7.30 cfs @ 12.11 hrs, Volume= 0.532 af, Depth= 2.81" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 year Rainfall=4.20" Area (sf) 16,650 82,350 99,000 CN Description 98 Paved roads w/curbs & sewers 85 1/2 acre lots, 25% imp, HSG D 87 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftIft) (ftIsec) (cfs) 0.8 280 0.0800 5.7 Shallow Concentrated Flow, Curb Flow Paved Kv= 20.3 fps 17.9 180 0.1200 0.2 Sheet Flow, hillside Woods: Light underbrush n= 0.400 P2= 2.80" 18.7 460 Total Runoff = Subcatchment 35: Candy Cove North 8.38 cfs @ 12.09 hrs, Volume= 0.602 af, Depth= 3.10" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 year Rainfall=4.20" Area (sf) 40,740 60,740 101,480 CN Description 98 Paved parking & roofs 85 1/2 acre lots, 25% imp, HSG D 90 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftIft) (ftIsec) (cfs) 1.2 730 0.0300 9.9 12.12 Circular Channel (pipe), storm Diam= 15.0" Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.012 0.6 150 0.0400 4.1 Shallow Concentrated Flow, curb Paved Kv= 20.3 fps 15.8 140 0.1000 0.1 Sheet Flow, hillside Woods: Light underbrush n= 0.400 P2= 2.80" 17.6 1,020 Total Runoff = Subcatchment 4s: Candy Cove South 6.05 cfs @ 12.00 hrs, Volume= 0.340 af, Depth= 3.31" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 year Rainfall=4.20" T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 10 year Rainfal/=4.20" Page 11 4/6/2005 Area (sf) 36,160 17,590 53,750 CN Description 98 Paved parking & roofs 80 >75% Grass cover, Good, HSG D 92 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs) 1.6 300 0.0030 3.1 3.83 Circular Channel (pipe), CB 12 to MH 10 Diam= 15.0" Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.012 1.6 500 0.0700 5.4 Shallow Concentrated Flow, curb Paved Kv= 20.3 fps 5.8 90 0.0700 0.3 Sheet Flow, hillside Grass: Short n= 0.150 P2= 2.80" 9.0 890 Total Inflow Outflow Primary Pond 1 P: Local Lowland = 0.00 cfs @ 0.00 cfs @ 0.00 cfs @ 0.000 af 0.000 af, Atten= 0%, Lag= 0.0 min 0.000 af 0.00 hrs, Volume= 0.00 hrs, Volume= 0.00 hrs, Volume= = = Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 936.00' @ 0.00 hrs Surf.Area= 0.101 ac Storage= 0.000 af Plug-Flow detention time= (not calculated) Center-of-Mass det. time= (not calculated) # Invert Avail.Storage Storage Description 1 936.00' 2.882 af Custom Stage Data (Prismatic) Listed below Elevation (feet) 936.00 938.00 940.00 942.00 # Routing 1 Primary Surf.Area (acres) 0.101 0.258 0.640 0.984 Inc.Store ( acre-feet) 0.000 0.359 0.899 1.625 Cum.Store ( acre-feet) 0.000 0.359 1.258 2.882 Invert Outlet Devices 942.00' 30.0'long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=936.00' (Free Discharge) L1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) Pond 2P: TH 13 ditch T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems I nflow Area = Inflow = Outflow = Primary = Secondary = Type /I 24-hr 10 year Rainfal/=4.20" Page 12 4/6/2005 4.602 ac, Inflow Depth = 1.38" 7.26 cfs @ 12.12 hrs. Volume= 7.27 cfs @ 12.12 hrs. Volume= 7.27 cfs @ 12.12 hrs. Volume= 0.00 cfs @ 0.00 hrs. Volume= for 10 year event 0.530 af 0.530 af, Atten= 0%. Lag= 0.1 min 0.530 af 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs. dt= 0.05 hrs Peak Elev= 920.02' @ 12.12 hrs Surf.Area= 3,437 sf Storage= 72 cf Plug-Flow detention time= 0.2 min calculated for 0.530 af (100% of inflow) Center-of-Mass del. time= 0.1 min ( 815.8 - 815.7) # 1 Invert 920.00' Avail.Storage Storage Description 40.740 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area (feet) (sq-ft) 920.00 3,420 922.00 5,500 924.00 7,870 926.00 10,580 # Routing Invert 1 Primary 914.93' 2 Secondary 922.00' Inc.Store (cubic-feet) o 8,920 13,370 18,450 Cum.Store (cubic-feet) o 8,920 22.290 40.740 Outlet Devices 24.0" x 30.0' long Culvert RCP, mitered to conform to fill, Ke= 0.700 Outlet Invert= 914.11' S= 0.0273 'I' n= 0.013 Cc= 0.900 12.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=26.98 cfs @ 12.12 hrs HW=920.02' (Free Discharge) 't-1=Culvert (Inlet Controls 26.98 cfs @ 8.6 fps) Secondary OutFlow Max=O.OO cfs @ 0.00 hrs HW=920.00' (Free Discharge) 't-2=Broad-Crested Rectangular Weir (Controls 0.00 cfs) I nflow Area = Inflow = Outflow = Primary = Pond 3P: TH 13 Ditch @ Candy Cove Int 2.330 ac, Inflow Depth = 3.08" 8.38 cfs @ 12.10 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 10 year event 0.599 af 0.000 aft Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs. dt= 0.05 hrs Peak Elev= 931.98' @ 24.00 hrs Surf.Area= 0.238 ac Storage= 0.599 af Plug-Flow detention time= (not calculated) Center-of-Mass del. time= (not calculated) # 1 Invert 928.00' Avail.Storage Storage Description 2.053 af Custom Stage Data (Prismatic) Listed below T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Elevation (feet) 928.00 930.00 932.00 933.00 934.00 936.00 # Routing 1 Primary Surf.Area ( acres) 0.072 0.146 0.239 0.302 0.370 0.475 Inc.Store (acre-feet) 0.000 0.218 0.385 0.270 0.336 0.844 Type /I 24-hr 10 year Rainfal/=4.20" Page 13 4/6/2005 Cum.Store (acre-feet) 0.000 0.218 0.603 0.874 1.209 2.053 I nvert Outlet Devices 934.00' 30.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=928.00' (Free Discharge) "t-1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) Inflow Area = Inflow = Outflow = Primary = Pond 4P: Regional Pond 1.234 ac, Inflow Depth = 3.30" for 6.01 cfs @ 12.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 10 year event 0.340 af 0.000 af, Atten= 100%, 0.000 af Lag= 0.0 min Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 924.36' @ 24.00 hrs Surf.Area= 0.880 ac Storage= 0.340 af Plug-Flow detention time= (not calculated) Center-of-Mass del. time= (not calculated) # 1 Invert 924.00' Elevation (feet) 924.00 926.00 928.00 930.00 932.00 934.00 # Routing 1 Primary Avail.Storage Storage Description 15.027 af Custom Stage Data (Prismatic) Listed below Surf.Area (acres) 0.849 1.015 1.178 1.423 2.098 2.750 Inc.Store ( acre-feet) 0.000 1.864 2.192 2.601 3.521 4.848 Cum.Store (acre-feet) 0.000 1.864 4.056 6.657 10.179 15.027 I nvert Outlet Devices 932.00' 30.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=924.00' (Free Discharge) "t-1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAO@7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 10 year Rainfal/=4.20" Page 14 4/6/2005 Inflow Area = Inflow = Outflow = Primary = Secondary = Pond 5P: MH 5 2.273 ac, Inflow Depth = 2.81" 7.30 cfs @ 12.11 hrs, Volume= 7.26 cfs @ 12.12 hrs, Volume= 7.26 cfs @ 12.12 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 10 year event 0.532 af 0.530 af, Atten= 0%, Lag= 0.5 min 0.530 af 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 935.43' @ 12.11 hrs Surf.Area= 28 sf Storage= 162 cf Plug-Flow detention time= 4.0 min calculated for 0.529 af (99% of inflow) Center-of-Mass det. time= 1.7 min (815.7 - 814.0) # 1 Invert 929.66' Avail.Storage Storage Description 362 cf Custom Stage Data (Prismatic) Listed below Elevation SUrf.Area (feet) (sq-ft) 929.66 28 932.70 28 937.40 28 937.75 800 # Routing Invert 1 Primary 932.72' 2 Secondary 937.75' Inc.Store (cubic-feet) o 85 132 145 Cum.Store ( cubic-feet) o 85 217 362 Outlet Devices 15.0" x 286.0' long Culvert RCP, mitered to conform to fill, Ke= 0.700 Outlet Invert= 929.66' S= 0.0107 'I' n= 0.013 Cc= 0.900 10.0' long x 3.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 Coef. (English) 2.44 2.58 2.68 2.67 2.65 2.64 2.64 2.68 2.68 2.72 2.81 2.92 2.97 3.07 3.32 Primary OutFlow Max=7.18 cfs @ 12.12 hrs HW=935.36' (Free Discharge) L1=Culvert (Barrel Controls 7.18 cfs @ 5.9 fps) Secondary OutFlow Max=O.OO cfs @ 0.00 hrs HW=929.66' (Free Discharge) L2=Broad-Crested Rectangular Weir (Controls 0.00 cfs) Inflow Area = Inflow = Outflow = Primary = Pond 6P: MH 16 2.330 ac, Inflow Depth = 3.10" 8.38 cfs @ 12.09 hrs, Volume= 8.38cfs@ 12.10hrs, Volume= 8.38 cfs @ 12.10 hrs, Volume= for 10 year event 0.602 af 0.599 af, Atten= 0%, Lag= 0.1 min 0.599 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 938.56' @ 12.10 hrs SUrf.Area= 28 sf Storage= 160 cf Plug-Flow detention time= 4.8 min calculated for 0.599 af (100% of inflow) Center-of-Mass det. time= 2.1 min ( 804.2 - 802.1 ) T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type" 24-hr 10 year Rainfal/=4.20" Page 15 4/6/2005 # 1 Invert 932.85' Elevation (feet) 932.85 936.45 941.09 # Routing 1 Primary Avail.Storage Storage Description 231 cf Custom Stage Data (Prismatic) Listed below Surf.Area (sq-ft) 28 28 28 Inc.Store (cubic-feet) o 101 130 Cum.Store ( cubic-feet) o 101 231 I nvert Outlet Devices 936.85' 15.0" x 60.0' long Culvert RCP, rounded edge headwall, Ke= 0.100 Outlet Invert= 932.85' S= 0.0667 'I' n= 0.013 Cc= 0.900 Primary OutFlow Max=8.34 cfs @ 12.10 hrs HW=938.55' (Free Discharge) L1=Culvert (Inlet Controls 8.34 cfs @ 6.8 fps) Inflow Area = Inflow = Outflow = Primary = Pond 7P: MH 10 1.234 ac, Inflow Depth = 3.31" 6.05 cfs @ 12.00 hrs, Volume= 6.01 cfs @ 12.00 hrs, Volume= 6.01 cfs @ 12.00 hrs, Volume= for 10 year event 0.340 af 0.340 af, Atten= 1 %, Lag= 0.2 min 0.340 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 949.82' @ 12.00 hrs Surf.Area= 28 sf Storage= 56 cf Plug-Flow detention time= 0.9 min calculated for 0.340 af (100% of inflow) Center-of-Mass del. time= 0.5 min ( 787.3 - 786.8 ) # 1 Invert 947.81' Elevation (feet) 947.81 948.00 951.90 # Routing 1 Primary Avail.Storage Storage Description 115 cf Custom Stage Data (Prismatic) Listed below Surf.Area ( sq-ft) 28 28 28 Inc.Store (cubic-feet) o 5 109 Cum.Store ( cubic-feet) o 5 115 I nvert Outlet Devices 948.01' 15.0" x 40.0' long Culvert RCP, rounded edge headwall, Ke= 0.100 Outlet Invert= 947.81' S= 0.0050 'I' n= 0.013 Cc= 0.900 Primary OutFlow Max=5.98 cfs @ 12.00 hrs HW=949.81' (Free Discharge) L1=Culvert (Barrel Controls 5.98 cfs @ 4.9 fps) T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 100 year Rainfal/=5.90" Page 16 4/6/2005 Time span=O.OO-24.00 hrs, dt=O.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+ Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Centennial Runoff Area=99,000 sf Runoff Depth=4.41" Flow Length=460' Tc=18.7 min CN=87 Runoff=11.25 cfs 0.834 af Subcatchment 3S: Candy Cove North Runoff Area=101,480 sf Runoff Depth=4.73" Flow Length=1 ,020' Tc=17.6 min CN=90 Runoff=12.53 cfs 0.919 af Subcatchment 4s: Candy Cove South Runoff Area=53,750 sf Runoff Depth=4.96" Flow Length=890' Tc=9.0 min CN=92 Runoff=8.86 cfs 0.510 af Pond 1 P: Local Lowland Peak Elev=936.13' Storage=0.023 af Inflow=3.60 cfs 0.023 af Outflow=O.OO cfs 0.000 af Pond 2P: TH 13 ditch Peak Elev=920.02' Storage=89 cf Inflow=9.08 cfs 0.809 af Primary=9.07 cfs 0.809 af Secondary=O.OO cfs 0.000 af Outflow=9.07 cfs 0.809 af Pond 3P: TH 13 Ditch @ Candy Cove Int Peak Elev=933.13' Storage=0.916 af Inflow=12.53 cfs 0.916 af Outflow=O.OO cfs 0.000 af Pond 4P: Regional Pond Peak Elev=924.55' Storage=0.510 af Inflow=8.80 cfs 0.510 af Outflow=O.OO cfs 0.000 af Pond 5P: MH 5 Peak Elev=938.02' Storage=362 cf Inflow=11.25 cfs 0.834 af Primary=9.08 cfs 0.809 af Secondary=3.60 cfs 0.023 af Outflow=12.68 cfs 0.832 af Pond 6P: MH 16 Peak Elev=939.89' Storage=197 cf Inflow=12.53 cfs 0.919 af 15.0" x 60.0' Culvert Outflow=12.53 cfs 0.916 af Pond 7P: MH 10 Peak Elev=950.68' Storage=80 cf Inflow=8.86 cfs 0.510 af 15.0" x 40.0' Culvert Outflow=8.80 cfs 0.510 af Total Runoff Area = 5.836 ac Runoff Volume = 2.264 af Average Runoff Depth = 4.65" T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sin 002276 @ 1986-2003 Applied Microcomputer Systems Runoff = Type /I 24-hr 100 year Rainfal/=5.90" Page 17 4/6/2005 Subcatchment 15: Centennial 11.25 cfs @ 12.11 hrs, Volume= 0.834 af, Depth= 4.41" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 year Rainfall=5.90" Area (sf) 16,650 82,350 99,000 CN Description 98 Paved roads w/curbs & sewers 85 1/2 acre lots, 25% imp, HSG D 87 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftIft) (ftIsec) (cfs) 0.8 280 0.0800 5.7 Shallow Concentrated Flow, Curb Flow Paved Kv= 20.3 fps 17.9 180 0.1200 0.2 Sheet Flow, hillside Woods: Light underbrush n= 0.400 P2= 2.80" 18.7 460 Total Runoff = Subcatchment 35: Candy Cove North 12.53 cfs @ 12.09 hrs, Volume= 0.919 af, Depth= 4.73" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 year Rainfall=5.90" Area (sf) 40,740 60,740 101,480 CN Description 98 Paved parking & roofs 85 1/2 acre lots, 25% imp, HSG D 90 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftIft) (ftIsec) (cfs) 1.2 730 0.0300 9.9 12.12 Circular Channel (pipe), storm Diam= 15.0" Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.012 0.6 150 0.0400 4.1 Shallow Concentrated Flow, curb Paved Kv= 20.3 fps 15.8 140 0.1000 0.1 Sheet Flow, hillside Woods: Light underbrush n= 0.400 P2= 2.80" 17.6 1,020 Total Runoff = Subcatchment 4s: Candy Cove South 8.86 cfs @ 12.00 hrs, Volume= 0.510 af, Depth= 4.96" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 year Rainfall=5.90" T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAO@7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 100 year Rainfal/=5.90" Page 18 4/6/2005 Area (sf) 36,160 17,590 53,750 CN Description 98 Paved parking & roofs 80 >75% Grass cover, Good, HSG D 92 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftIft) (ftIsec) (cfs) 1.6 300 0.0030 3.1 3.83 Circular Channel (pipe), CB 12 to MH 10 Diam= 15.0" Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.012 1.6 500 0.0700 5.4 Shallow Concentrated Flow, curb Paved Kv= 20.3 fps 5.8 90 0.0700 0.3 Sheet Flow, hillside Grass: Short n=0.150 P2= 2.80" 9.0 890 Total Inflow = Outflow = Primary = Pond 1 P: Local Lowland 3.60 cfs @ 12.10 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.023 af 0.000 af, Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 936.13' @ 12.25 hrs Surf.Area= 0.111 ac Storage= 0.023 af Plug-Flow detention time= (not calculated) Center-of-Mass det. time= (not calculated) # 1 Invert 936.00' Elevation (feet) 936.00 938.00 940.00 942.00 Avail.Storage Storage Description 2.882 af Custom Stage Data (Prismatic) Listed below Surf.Area ( acres) 0.101 0.258 0.640 0.984 Inc.Store ( acre-feet) 0.000 0.359 0.899 1.625 Cum.Store ( acre-feet) 0.000 0.359 1.258 2.882 Invert Outlet Devices 942.00' 30.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=936.00' (Free Discharge) 't.-1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) # Routing 1 Primary Pond 2P: TH 13 ditch T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 100 year Rainfal/=5.90" Page 19 4/6/2005 Inflow Area = Inflow = Outflow = Primary = Secondary = 4.602 ac, Inflow Depth = 2.11" 9.08 cfs @ 12.10 hrs, Volume= 9.07 cfs @ 12.11 hrs, Volume= 9.07 cfs @ 12.11 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 100 year event 0.809 af 0.809 af, Atten= 0%, Lag= 0.2 min 0.809 af 0.000 af Routing by Stor-lnd method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 920.02' @ 12.11 hrs Surf.Area= 3,441 sf Storage= 89 cf Plug-Flow detention time= 0.2 min calculated for 0.807 af (100% of inflow) Center-of-Mass del. time= 0.1 min ( 805.1 - 804.9 ) # 1 Invert 920.00' Avail.Storage Storage Description 40,740 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area (feet) (sq-ft) 920.00 3,420 922.00 5,500 924.00 7,870 926.00 10,580 # Routing Invert 1 Primary 914.93' 2 Secondary 922.00' Inc. Store ( cubic-feet) o 8,920 13,370 18,450 Cum.Store (cubic-feet) o 8,920 22,290 40,740 Outlet Devices 24.0" x 30.0' long Culvert RCP, mitered to conform to fill, Ke= 0.700 Outlet Invert= 914.11' S= 0.0273 'I' n= 0.013 Cc= 0.900 12.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coet. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=26.99 cfs @ 12.11 hrs HW=920.02' (Free Discharge) L1=Culvert (Inlet Controls 26.99 cfs @ 8.6 fps) Secondary OutFlow Max=O.OO cfs @ 0.00 hrs HW=920.00' (Free Discharge) L2=Broad-Crested Rectangular Weir (Controls 0.00 cfs) Inflow Area = Inflow = Outflow = Primary = Pond 3P: TH 13 Ditch @ Candy Cove Int 2.330 ac, Inflow Depth = 4.72" 12.53 cfs @ 12.10 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 100 year event 0.916 af 0.000 af, Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 933.13' @ 24.00 hrs Surf.Area= 0.311 ac Storage= 0.916 af Plug-Flow detention time= (not calculated) Center-of-Mass del. time= (not calculated) # 1 Invert 928.00' Avail.Storage Storage Description 2.053 af Custom Stage Data (Prismatic) Listed below " '. T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 100 year Rainfal/=5.90" Page 20 4/6/2005 Elevation (feet) 928.00 930.00 932.00 933.00 934.00 936.00 Surf.Area (acres) 0.072 0.146 0.239 0.302 0.370 0.475 Inc.Store ( acre-feet) 0.000 0.218 0.385 0.270 0.336 0.844 Cum.Store (acre-feet) 0.000 0.218 0.603 0.874 1.209 2.053 Invert Outlet Devices 934.00' 30.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=928.00' (Free Discharge) 't..-1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) # Routing 1 Primary Inflow Area = Inflow = CJtflow = Primary = Pond 4P: Regional Pond 1.234 ac, Inflow Depth = 4.96" 8.80 cfs @ 12.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= for 100 year event 0.510 af 0.000 af, Atten= 100%, Lag= 0.0 min 0.000 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 924.55' @ 24.00 hrs Surf.Area= 0.895 ac Storage= 0.510 af Plug-Flow detention time= (not calculated) Center-of-Mass det. time= (not calculated) # 1 Invert 924.00' Elevation (feet) 924.00 926.00 928.00 930.00 932.00 934.00 # Routing 1 Primary Avail.Storage Storage Description 15.027 af Custom Stage Data (Prismatic) Listed below Surf.Area (acres) 0.849 1.015 1.178 1.423 2.098 2.750 Inc.Store ( acre-feet) 0.000 1.864 2.192 2.601 3.521 4.848 Cum.Store ( acre-feet) 0.000 1.864 4.056 6.657 10.179 15.027 I nvert Outlet Devices 932.00' 30.0' long x 10.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=O.OO cfs @ 0.00 hrs HW=924.00' (Free Discharge) 't..-1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) " " T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAD@7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Inflow Area = Inflow = Outflow = Primary = Secondary = Type /I 24-hr 100 year Rainfal/=5.90" Page 21 4/6/2005 Pond 5P: MH 5 2.273 ac, Inflow Depth = 4.41" 11.25 cfs @ 12.11 hrs, Volume= 12.68 cfs @ 12.10 hrs, Volume= 9.08 cfs @ 12.10 hrs, Volume= 3.60cfs@ 12.10hrs, Volume= for 100 year event 0.834 af 0.832 af, Atten= 0%, Lag= 0.0 min 0.809 af 0.023 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 938.02' @ 12.10 hrs Surf.Area= 800 sf Storage= 362 cf Plug-Flow detention time= 2.9 min calculated for 0.830 af (100% of inflow) Center-of-Mass det. time= 1.4 min ( 802.8 - 801.4 ) # 1 Invert 929.66' Avail.Storage Storage Description 362 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area (feet) (sq-ft) 929.66 28 932.70 28 937.40 28 937.75 800 # Routing Invert 1 Primary 932.72' 2 Secondary 937.75' Inc.Store (cubic-feet) o 85 132 145 Cum.Store ( cubic-feet) o 85 217 362 Outlet Devices 15.0" x 286.0' long Culvert RCP, mitered to conform to fill, Ke= 0.700 Outlet Invert= 929.66' S= 0.0107 '/' n= 0.013 Cc= 0.900 10.0' long x 3.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 Coef. (English) 2.44 2.58 2.68 2.67 2.65 2.64 2.64 2.68 2.68 2.72 2.81 2.92 2.97 3.07 3.32 Primary OutFlow Max=9.07 cfs @ 12.10 hrs HW=938.01' (Free Discharge) 't-1=Culvert (Barrel Controls 9.07 cfs @ 7.4 fps) ~COndary OutFlow Max=3.47 cfs @ 12.10 hrs HW=938.02' (Free Discharge) 2=Broad-Crested Rectangular Weir (Weir Controls 3.47 cfs @ 1.3 fps) Inflow Area = Inflow = Outflow = Primary = Pond 6P: MH 16 2.330 ac, Inflow Depth = 4.73" 12.53 cfs @ 12.09 hrs, Volume= 12.53 cfs @ 12.10 hrs, Volume= 12.53 cfs @ 12.10 hrs, Volume= for 100 year event 0.919 af 0.916 af, Atten= 0%, Lag= 0.2 min 0.916 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 939.89' @ 12.10 hrs Surf.Area= 28 sf Storage= 197 cf Plug-Flow detention time= 3.4 min calculated for 0.914 af (100% of inflow) Center-of-Mass det. time= 1.6 min ( 792.1 - 790.5 ) 1 . T1621543 Proposed 040505 Prepared by Bolton & Menk, Inc. HydroCAO@ 7.00 sIn 002276 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr 100 year Rainfal/=5.90" Page 22 4/6/2005 # 1 Invert 932.85' Elevation (feet) 932.85 936.45 941.09 # Routing 1 Primary Avail.Storage Storage Description 231 cf Custom Stage Data (Prismatic) Listed below Surf.Area (sq-ft) 28 28 28 Inc.Store ( cubic-feet) o 101 130 Cum.Store (cubic-feet) o 101 231 I nvert Outlet Devices 936.85' 15.0" x 60.0' long Culvert RCP, rounded edge headwall, Ke= 0.100 Outlet Invert= 932.85' S= 0.0667 'I' n= 0.013 Cc= 0.900 Primary OutFlow Max=12.47 cfs @ 12.10 hrs HW=939.87' (Free Discharge) L1=Culvert (Inlet Controls 12.47 cfs @ 10.2 fps) Inflow Area = Inflow = Outflow = Primary = Pond 7P: MH 10 1.234 ac, Inflow Depth = 4.96" 8.86 cfs @ 12.00 hrs, Volume= 8.80 cfs @ 12.00 hrs, Volume= 8.80 cfs @ 12.00 hrs, Volume= for 100 year event 0.510 af 0.510 af, AUen= 1%, Lag= 0.1 min 0.510 af Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 950.68' @ 12.00 hrs Surf.Area= 28 sf Storage= 80 cf Plug-Flow detention time= 0.7 min calculated for 0.509 af (100% of inflow) Center-of-Mass det. time= 0.4 min ( 776.4 - 776.0 ) # 1 Invert 947.81' Elevation (feet) 947.81 948.00 951.90 # Routing 1 Primary Avail.Storage Storage Description 115 cf Custom Stage Data (Prismatic) Listed below Surf.Area ( sq-ft) 28 28 28 Inc.Store (cubic-feet) o 5 109 Cum.Store ( cubic-feet) o 5 115 I nvert Outlet Devices 948.01' 15.0" x 40.0'long Culvert RCP, rounded edge headwall, Ke= 0.100 Outlet Invert= 947.81' S= 0.0050 'I' n= 0.013 Cc= 0.900 Primary OutFlow Max=8.80 cfs @ 12.00 hrs HW=950.68' (Free Discharge) L1=Culvert (Barrel Controls 8.80 cfs @ 7.2 fps)