20150739 Ver 2_10_Corners_SCM Calcs_20191022

CORNERS AT BRIER CREEK
TON-17020

STORMWATER MANAGEMENT FACILITY ‘D’
DESIGN CALCULATIONS

CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'D'
SSFxn Above NP
E. MAGOON, EI
8/21/2019
STAGE-STORAGE FUNCTION - ABOVE NORMAL POOL
Average Incremental Accumulated Estimated
Contour Contour Contour Contour Stage
Contour Stage Area Area Volume Volume w/ S-S Fxn
(feet)(feet)(SF)(SF)(CF)(CF)(feet)
346.0 0.00 22,421
346.5 0.50 26,495 24458 12229 12229 0.51
348.0 2.00 30,156 28326 42488 54717 1.95
350.0 4.00 35,520 32838 65676 120393 3.95
352.0 6.00 41,205 38363 76725 197118 6.15
1.113705805 10.16804015
26056.95885
KS = 26057
b =1.1137
y = 26057x1.1137
R² = 0.9995
0
50000
100000
150000
200000
250000
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00Storage (CF)Stage (feet)
Storage vs. Stage
CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'D'
SSFxn Main Pool
E. MAGOON, EI
8/21/2019
STAGE-STORAGE FUNCTION - MAIN POOL
Average Incremental Accumulated Estimated
Contour Contour Contour Contour Stage
Contour Stage Area Area Volume Volume w/ S-S Fxn
(feet)(feet)(SF)(SF)(CF)(CF)(feet)
338.0 0.00 5,179
340.0 2.00 7,268 6224 12447 12447 2.04
342.0 4.00 9,500 8384 16768 29215 3.89
344.0 6.00 11,955 10728 21455 50670 5.90
345.5 7.50 13,916 12936 19403 70073 7.55
346.0 8.00 16,995 15456 7728 77801 8.17
1.318385607 8.492461418
4877.857755
KS = 4878
b =1.3184
y = 4877.9x1.3184
R² = 0.9986
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
0.00 2.00 4.00 6.00 8.00 10.00Storage (CF)Stage (feet)
Storage vs. Stage
CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'D'
SSFxn Forebay
E. MAGOON, EI
8/21/2019
STAGE-STORAGE FUNCTION - FOREBAY
Average Incremental Accumulated Estimated
Contour Contour Contour Contour Stage
Contour Stage Area Area Volume Volume w/ S-S Fxn
(feet)(feet)(SF)(SF)(CF)(CF)(feet)
338.0 0.00 863
340.0 2.00 1,540 1202 2403 2403 2.04
342.0 4.00 2,259 1900 3799 6202 3.86
344.0 6.00 3,090 2675 5349 11551 5.86
345.5 7.50 4,026 3558 5337 16888 7.56
346.0 8.00 5,054 4540 2270 19158 8.23
1.490803555 6.718279644
827.3928764
KS = 827.4
b =1.4908
y = 827.39x1.4908
R² = 0.9976
0
5000
10000
15000
20000
25000
0.00 2.00 4.00 6.00 8.00 10.00Storage (CF)Stage (feet)
Storage vs. Stage
CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'D'
Volume Calculation
E. MAGOON, EI
8/21/2019
TOTAL VOLUME OF FACILITY
Volume of Main Pool =77,801 cf
Volume of Forebay =19,158 cf
Total Volume Below NWSE =96,959 cf
=2.23 acre-ft
Total Volume Above NWSE =197,118 cf
=4.53 acre-ft
Total Volume of Facility =294,077 cf
=6.75 acre-ft
FOREBAY PERCENTAGE OF PERMANENT POOL VOLUME
total permanent pool volume.
Total Volume Below NWSE =96,959 cf
Volume of Forebay =19,158 cf
% Forebay =19.8%
AVERAGE DEPTH OF POND
Total Volume Below NWSE =96,959 cf
Surface Area at NWSE =22,421 sf
Average Depth =4.32 ft
Per NCDWQ design guidelines, the forebay volume should equal approximately 20% of the
CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'D'
Surface Area Calculation
E. MAGOON, EI
8/21/2019
WET DETENTION BASIN SUMMARY
From Stormwater Best Management Practices Manual . NCDENR: Division of Water Quality.
Enter the drainage area characteristics ==>
14.89 acres
7.27 acres
Note The basin must be sized to treat all impervious surface runoff draining into the pond, not just the impervious
surface from on-site development.
Drainage area =14.89 acres @ 48.8%impervious
Estimate the surface area required at pond normal pool elevation ==>
Wet Detention Basins are based on an minimum average depth of =4.32 feet (Calculated)
From the DWQ BMP Handbook, the required SA/DA ratio for 90%TSS Removal ==>
4.0 4.32 4.5
Lower Boundary =>40.0 2.00 1.90
Site % impervious =>48.8 2.44 2.32 2.25
Upper Boundary =>50.0 2.50 2.30
Therefore, SA/DA required =2.32
Surface area required at normal pool = 15,050 ft2
=0.35 acres
Surface area provided at normal pool = 22,421 ft2
Total drainage area to pond =
Total impervious area to pond =
CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'D'
WQV Calculation
E. MAGOON, EI
8/21/2019
DETERMINATION OF WATER QUALITY VOLUME
WQ V = (P)(R V )(A)/12
where,
WQV = water quality volume (in acre-ft)
RV = 0.05+0.009(I) where I is percent impervious cover
A = area in acres
P = rainfall (in inches)
Input data:
Total area, A =14.89 acres
Impervious area =7.27 acres
Percent impervious cover, I =48.8 %
Rainfall, P =1.00 inches
Calculated values:
RV = 0.49
WQV = 0.61 acre-ft
=26468 cf.
ASSOCIATED DEPTH IN POND
WQV = 26468 cf.
Stage / Storage Data:
Ks =26057
b =1.114
Zo =346.00
Volume in 1" rainfall =26468 cu. ft
Calculated values:
Depth of WQv in Basin =1.01 ft
=12.17 inches
Elevation =347.01 ft
CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'D'
WQV Drawdown Calculation
E. MAGOON, EI
8/21/2019
DRAWDOWN ORIFICE DESIGN
D orifice =2.75 inch
# orifices =1
Ks =26057
b =1.1137
Cd orifice =0.60
Normal Pool Elevation =346.00 feet
Volume @ Normal Pool =0 cf
Orifice Invert =346.00 feet
WSEL @ 1" Runoff Volume =347.01 feet
WSEL Vol. Stored Orifice Flow Avg. Flow Incr. Vol.Incr. Time
(feet)(cf)(cfs)(cfs)(cf)(sec)
347.01 26468 0.188
346.93 23906 0.179 0.183 2562 13974
346.84 21372 0.169 0.174 2534 14601
346.75 18869 0.158 0.163 2504 15341
346.66 16398 0.146 0.152 2470 16235
346.57 13966 0.134 0.140 2432 17350
346.48 11576 0.120 0.127 2390 18796
346.39 9236 0.105 0.113 2340 20791
346.31 6955 0.087 0.096 2281 23824
346.22 4750 0.062 0.074 2206 29681
346.13 2647 0.028 0.045 2103 46627
Drawdown Time =2.51 days
By comparison, if calculated by the average head over the orifice
(assuming average head is half the total depth), the result would be:
Average driving head on orifice = 0.300 feet
Orifice composite loss coefficient = 0.600
Cross-sectional area of siphon = 0.041 sf
Q =0.1088 cfs
Drawdown Time = Volume / Flowrate / 86400 (sec/day)
Drawdown Time = 2.82 days
Storm Event: 1-YRLabel: SWMF D
Return Event: 1 yearsSubsection: Elevation-Area Volume Curve
Volume (Total)
(ac-ft)
Volume
(ac-ft)
A1+A2+sqr
(A1*A2)
(ft²)
Area
(ft²)
Planimeter
(ft²)
Elevation
(ft)
0.0000.000022,4210.0346.00
0.2800.28073,28926,4950.0346.50
1.2550.97584,91730,1560.0348.00
2.7611.50698,40435,5200.0350.00
4.5211.760114,98241,2050.0352.00
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF D
Return Event: 1 yearsSubsection: Outlet Input Data
Requested Pond Water Surface Elevations
ft346.00Minimum (Headwater)
ft0.10Increment (Headwater)
ft352.00Maximum (Headwater)
Outlet Connectivity
E2
(ft)
E1
(ft)
OutfallDirectionOutlet IDStructure Type
347.75347.25CulvertForwardWeir - AORectangular Weir
352.00347.75CulvertForwardOrificeOrifice-Area
352.00349.75CulvertForwardRiserInlet Box
352.00346.00CulvertForwardWQ OrificeOrifice-Circular
352.00345.00TWForwardCulvertCulvert-Circular
(N/A)(N/A)TailwaterTailwater Settings
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF D
Return Event: 1 yearsSubsection: Outlet Input Data
Structure ID: Culvert
Structure Type: Culvert-Circular
1Number of Barrels
in36.000Diameter
ft64.00Length
ft64.01Length (Computed Barrel)
ft/ft0.016Slope (Computed)
Outlet Control Data
0.013Manning's n
0.5Ke
0.0Kb
0.0Kr
ft0.00Convergence Tolerance
Inlet Control Data
Form 1Equation Form
0.0098K
2.0000M
0.0398C
0.6700Y
1.2T1 ratio (HW/D)
1.3T2 ratio (HW/D)
-0.5Slope Correction Factor
Use unsubmerged inlet control 0 equation below T1 elevation.
Use submerged inlet control 0 equation above T2 elevation
In transition zone between unsubmerged and submerged inlet
control,
interpolate between flows at T1 & T2...
ft348.46T1 Elevation ft³/s42.85T1 Flow
ft348.90T2 Elevation ft³/s48.97T2 Flow
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF D
Return Event: 1 yearsSubsection: Outlet Input Data
Structure ID: Riser
Structure Type: Inlet Box
1Number of Openings
ft349.75Elevation
ft²25.0Orifice Area
0.6Orifice Coefficient
ft20.00Weir Length
(ft^0.5)/s3.00Weir Coefficient
1.0K Reverse
0.0Manning's n
0.0Kev, Charged Riser
FalseWeir Submergence
FalseOrifice H to crest
Structure ID: WQ Orifice
Structure Type: Orifice-Circular
1Number of Openings
ft346.00Elevation
in2.750Orifice Diameter
0.6Orifice Coefficient
Structure ID: Orifice
Structure Type: Orifice-Area
1Number of Openings
ft347.25Elevation
ft²1.0Orifice Area
ft347.75Top Elevation
ft347.50Datum Elevation
0.6Orifice Coefficient
Structure ID: Weir - AO
Structure Type: Rectangular Weir
1Number of Openings
ft347.25Elevation
ft2.00Weir Length
(ft^0.5)/s3.00Weir Coefficient
Structure ID: TW
Structure Type: TW Setup, DS Channel
Free OutfallTailwater Type
Convergence Tolerances
30Maximum Iterations
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF D
Return Event: 1 yearsSubsection: Outlet Input Data
Convergence Tolerances
ft0.01Tailwater Tolerance
(Minimum)
ft0.50Tailwater Tolerance
(Maximum)
ft0.01Headwater Tolerance
(Minimum)
ft0.50Headwater Tolerance
(Maximum)
ft³/s0.001Flow Tolerance (Minimum)
ft³/s10.000Flow Tolerance (Maximum)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF D
Return Event: 1 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
(no Q: Weir -
AO,Orifice,Riser,WQ
Orifice,Culvert)
0.00(N/A)0.00346.00
WQ Orifice,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.01346.10
WQ Orifice,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.05346.20
WQ Orifice,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.08346.30
WQ Orifice,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.11346.40
WQ Orifice,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.12346.50
WQ Orifice,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.14346.60
WQ Orifice,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.15346.70
WQ Orifice,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.16346.80
WQ Orifice,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.18346.90
WQ Orifice,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.19347.00
WQ Orifice,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.20347.10
WQ Orifice,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.21347.20
WQ Orifice,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.21347.25
Weir - AO,WQ
Orifice,Culvert (no Q:
Orifice,Riser)
0.00(N/A)0.28347.30
Weir - AO,WQ
Orifice,Culvert (no Q:
Orifice,Riser)
0.00(N/A)0.57347.40
Weir - AO,WQ
Orifice,Culvert (no Q:
Orifice,Riser)
0.00(N/A)0.96347.50
Weir - AO,WQ
Orifice,Culvert (no Q:
Orifice,Riser)
0.00(N/A)1.44347.60
Weir - AO,WQ
Orifice,Culvert (no Q:
Orifice,Riser)
0.00(N/A)1.98347.70
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)2.89347.80
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF D
Return Event: 1 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)3.31347.90
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)3.68348.00
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)4.01348.10
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)4.31348.20
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)4.60348.30
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)4.86348.40
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)5.12348.50
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)5.37348.60
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)5.59348.70
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)5.80348.80
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)6.02348.90
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)6.22349.00
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)6.43349.10
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)6.61349.20
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)6.80349.30
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)6.98349.40
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)7.16349.50
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)7.34349.60
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)7.51349.70
Orifice,WQ Orifice,Culvert
(no Q: Weir - AO,Riser)
0.00(N/A)7.58349.75
Orifice,Riser,WQ
Orifice,Culvert (no Q:
Weir - AO)
0.00(N/A)8.34349.80
Orifice,Riser,WQ
Orifice,Culvert (no Q:
Weir - AO)
0.00(N/A)11.29349.90
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF D
Return Event: 1 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
Orifice,Riser,WQ
Orifice,Culvert (no Q:
Weir - AO)
0.00(N/A)15.44350.00
Orifice,Riser,WQ
Orifice,Culvert (no Q:
Weir - AO)
0.00(N/A)20.51350.10
Orifice,Riser,WQ
Orifice,Culvert (no Q:
Weir - AO)
0.00(N/A)26.09350.20
Orifice,Riser,WQ
Orifice,Culvert (no Q:
Weir - AO)
0.00(N/A)32.05350.30
Orifice,Riser,WQ
Orifice,Culvert (no Q:
Weir - AO)
0.00(N/A)38.57350.40
Orifice,Riser,WQ
Orifice,Culvert (no Q:
Weir - AO)
0.00(N/A)45.56350.50
Orifice,Riser,WQ
Orifice,Culvert (no Q:
Weir - AO)
0.00(N/A)52.88350.60
Orifice,Riser,WQ
Orifice,Culvert (no Q:
Weir - AO)
0.00(N/A)60.11350.70
Orifice,Riser,WQ
Orifice,Culvert (no Q:
Weir - AO)
0.00(N/A)67.03350.80
Riser,Culvert (no Q: Weir
- AO,Orifice,WQ Orifice)
0.00(N/A)70.10350.90
Riser,Culvert (no Q: Weir
- AO,Orifice,WQ Orifice)
0.00(N/A)70.98351.00
Riser,Culvert (no Q: Weir
- AO,Orifice,WQ Orifice)
0.00(N/A)71.86351.10
Riser,Culvert (no Q: Weir
- AO,Orifice,WQ Orifice)
0.00(N/A)72.73351.20
Riser,Culvert (no Q: Weir
- AO,Orifice,WQ Orifice)
0.00(N/A)73.59351.30
Riser,Culvert (no Q: Weir
- AO,Orifice,WQ Orifice)
0.00(N/A)74.43351.40
Riser,Culvert (no Q: Weir
- AO,Orifice,WQ Orifice)
0.00(N/A)75.27351.50
Riser,Culvert (no Q: Weir
- AO,Orifice,WQ Orifice)
0.00(N/A)76.10351.60
Riser,Culvert (no Q: Weir
- AO,Orifice,WQ Orifice)
0.00(N/A)76.93351.70
Riser,Culvert (no Q: Weir
- AO,Orifice,WQ Orifice)
0.00(N/A)77.74351.80
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF D
Return Event: 1 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
Riser,Culvert (no Q: Weir
- AO,Orifice,WQ Orifice)
0.00(N/A)78.54351.90
Riser,Culvert (no Q: Weir
- AO,Orifice,WQ Orifice)
0.00(N/A)79.33352.00
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF D (IN)
Return Event: 1 yearsSubsection: Level Pool Pond Routing Summary
Infiltration
No InfiltrationInfiltration Method
(Computed)
Initial Conditions
ft346.00Elevation (Water Surface,
Initial)
ac-ft0.000Volume (Initial)
ft³/s0.00Flow (Initial Outlet)
ft³/s0.00Flow (Initial Infiltration)
ft³/s0.00Flow (Initial, Total)
min1.00Time Increment
Inflow/Outflow Hydrograph Summary
ft³/s48.10Flow (Peak In) min721.00Time to Peak (Flow, In)
ft³/s4.18Flow (Peak Outlet) min755.00Time to Peak (Flow, Outlet)
ft348.16Elevation (Water Surface,
Peak)
ac-ft1.365Volume (Peak)
Mass Balance (ac-ft)
ac-ft0.000Volume (Initial)
ac-ft2.358Volume (Total Inflow)
ac-ft0.000Volume (Total Infiltration)
ac-ft1.513Volume (Total Outlet
Outflow)
ac-ft0.845Volume (Retained)
ac-ft-0.001Volume (Unrouted)
%0.0Error (Mass Balance)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 2-YRLabel: SWMF D (IN)
Return Event: 2 yearsSubsection: Level Pool Pond Routing Summary
Infiltration
No InfiltrationInfiltration Method
(Computed)
Initial Conditions
ft346.00Elevation (Water Surface,
Initial)
ac-ft0.000Volume (Initial)
ft³/s0.00Flow (Initial Outlet)
ft³/s0.00Flow (Initial Infiltration)
ft³/s0.00Flow (Initial, Total)
min1.00Time Increment
Inflow/Outflow Hydrograph Summary
ft³/s59.63Flow (Peak In) min721.00Time to Peak (Flow, In)
ft³/s5.51Flow (Peak Outlet) min755.00Time to Peak (Flow, Outlet)
ft348.66Elevation (Water Surface,
Peak)
ac-ft1.728Volume (Peak)
Mass Balance (ac-ft)
ac-ft0.000Volume (Initial)
ac-ft3.013Volume (Total Inflow)
ac-ft0.000Volume (Total Infiltration)
ac-ft2.143Volume (Total Outlet
Outflow)
ac-ft0.869Volume (Retained)
ac-ft-0.001Volume (Unrouted)
%0.0Error (Mass Balance)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 10-YRLabel: SWMF D (IN)
Return Event: 10 yearsSubsection: Level Pool Pond Routing Summary
Infiltration
No InfiltrationInfiltration Method
(Computed)
Initial Conditions
ft346.00Elevation (Water Surface,
Initial)
ac-ft0.000Volume (Initial)
ft³/s0.00Flow (Initial Outlet)
ft³/s0.00Flow (Initial Infiltration)
ft³/s0.00Flow (Initial, Total)
min1.00Time Increment
Inflow/Outflow Hydrograph Summary
ft³/s83.18Flow (Peak In) min721.00Time to Peak (Flow, In)
ft³/s11.83Flow (Peak Outlet) min754.00Time to Peak (Flow, Outlet)
ft349.91Elevation (Water Surface,
Peak)
ac-ft2.690Volume (Peak)
Mass Balance (ac-ft)
ac-ft0.000Volume (Initial)
ac-ft4.785Volume (Total Inflow)
ac-ft0.000Volume (Total Infiltration)
ac-ft3.862Volume (Total Outlet
Outflow)
ac-ft0.921Volume (Retained)
ac-ft-0.001Volume (Unrouted)
%0.0Error (Mass Balance)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 100-yrLabel: SWMF D (IN)
Return Event: 100 yearsSubsection: Level Pool Pond Routing Summary
Infiltration
No InfiltrationInfiltration Method
(Computed)
Initial Conditions
ft346.00Elevation (Water Surface,
Initial)
ac-ft0.000Volume (Initial)
ft³/s0.00Flow (Initial Outlet)
ft³/s0.00Flow (Initial Infiltration)
ft³/s0.00Flow (Initial, Total)
min1.00Time Increment
Inflow/Outflow Hydrograph Summary
ft³/s109.19Flow (Peak In) min721.00Time to Peak (Flow, In)
ft³/s42.92Flow (Peak Outlet) min729.00Time to Peak (Flow, Outlet)
ft350.46Elevation (Water Surface,
Peak)
ac-ft3.145Volume (Peak)
Mass Balance (ac-ft)
ac-ft0.000Volume (Initial)
ac-ft7.569Volume (Total Inflow)
ac-ft0.000Volume (Total Infiltration)
ac-ft6.604Volume (Total Outlet
Outflow)
ac-ft0.964Volume (Retained)
ac-ft-0.002Volume (Unrouted)
%0.0Error (Mass Balance)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 100-yrLabel: SWMF D (WC)
Return Event: 100 yearsSubsection: Outlet Input Data
Requested Pond Water Surface Elevations
ft346.00Minimum (Headwater)
ft0.10Increment (Headwater)
ft352.00Maximum (Headwater)
Outlet Connectivity
E2
(ft)
E1
(ft)
OutfallDirectionOutlet IDStructure Type
352.00347.75CulvertForwardOrificeOrifice-Area
352.00349.75CulvertForwardRiserInlet Box
347.75347.25CulvertForwardWeir - AORectangular Weir
352.00345.00TWForwardCulvertCulvert-Circular
(N/A)(N/A)TailwaterTailwater Settings
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC
Storm Event: 100-yrLabel: SWMF D (WC)
Return Event: 100 yearsSubsection: Outlet Input Data
Structure ID: Culvert
Structure Type: Culvert-Circular
1Number of Barrels
in36.000Diameter
ft64.00Length
ft64.01Length (Computed Barrel)
ft/ft0.016Slope (Computed)
Outlet Control Data
0.013Manning's n
0.5Ke
0.0Kb
0.0Kr
ft0.00Convergence Tolerance
Inlet Control Data
Form 1Equation Form
0.0098K
2.0000M
0.0398C
0.6700Y
1.2T1 ratio (HW/D)
1.3T2 ratio (HW/D)
-0.5Slope Correction Factor
Use unsubmerged inlet control 0 equation below T1 elevation.
Use submerged inlet control 0 equation above T2 elevation
In transition zone between unsubmerged and submerged inlet
control,
interpolate between flows at T1 & T2...
ft348.46T1 Elevation ft³/s42.85T1 Flow
ft348.90T2 Elevation ft³/s48.97T2 Flow
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC
Storm Event: 100-yrLabel: SWMF D (WC)
Return Event: 100 yearsSubsection: Outlet Input Data
Structure ID: Riser
Structure Type: Inlet Box
1Number of Openings
ft349.75Elevation
ft²25.0Orifice Area
0.6Orifice Coefficient
ft20.00Weir Length
(ft^0.5)/s3.00Weir Coefficient
1.0K Reverse
0.0Manning's n
0.0Kev, Charged Riser
FalseWeir Submergence
FalseOrifice H to crest
Structure ID: Orifice
Structure Type: Orifice-Area
1Number of Openings
ft347.25Elevation
ft²1.0Orifice Area
ft347.75Top Elevation
ft347.50Datum Elevation
0.6Orifice Coefficient
Structure ID: Weir - AO
Structure Type: Rectangular Weir
1Number of Openings
ft347.25Elevation
ft2.00Weir Length
(ft^0.5)/s3.00Weir Coefficient
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC
Storm Event: 100-yrLabel: SWMF D (WC)
Return Event: 100 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00346.00
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00346.10
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00346.20
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00346.30
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00346.40
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00346.50
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00346.60
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00346.70
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00346.80
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00346.90
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00347.00
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00347.10
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00347.20
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00347.25
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00347.30
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00347.40
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00347.500.00347.50
Weir - AO,Culvert (no Q:
Orifice,Riser)
0.00347.500.84347.60
Weir - AO,Culvert (no Q:
Orifice,Riser)
0.00347.501.41347.70
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.502.64347.80
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.503.01347.90
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.503.40348.00
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.503.73348.10
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC
Storm Event: 100-yrLabel: SWMF D (WC)
Return Event: 100 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.503.99348.20
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.504.30348.30
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.504.53348.40
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.504.78348.50
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.505.01348.60
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.505.23348.70
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.505.44348.80
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.505.63348.90
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.505.84349.00
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.506.09349.10
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.506.28349.20
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.506.46349.30
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.506.54349.40
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.506.74349.50
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.506.97349.60
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.507.14349.70
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00347.507.22349.75
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00347.507.88349.80
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00347.5010.81349.90
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00347.5014.89350.00
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00347.5019.81350.10
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00347.5025.38350.20
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00347.5031.56350.30
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC
Storm Event: 100-yrLabel: SWMF D (WC)
Return Event: 100 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00347.5038.18350.40
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00347.5045.26350.50
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00347.5052.66350.60
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00347.5059.95350.70
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00347.5066.90350.80
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00347.5070.10350.90
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00347.5070.98351.00
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00347.5071.86351.10
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00347.5072.73351.20
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00347.5073.59351.30
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00347.5074.43351.40
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00347.5075.27351.50
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00347.5076.10351.60
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00347.5076.93351.70
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00347.5077.74351.80
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00347.5078.54351.90
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00347.5079.33352.00
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC
Storm Event: 100-yrLabel: SWMF D (IN)
Return Event: 100 yearsSubsection: Level Pool Pond Routing Summary
Infiltration
No InfiltrationInfiltration Method
(Computed)
Initial Conditions
ft347.50Elevation (Water Surface,
Initial)
ac-ft0.916Volume (Initial)
ft³/s0.00Flow (Initial Outlet)
ft³/s0.00Flow (Initial Infiltration)
ft³/s0.00Flow (Initial, Total)
min1.00Time Increment
Inflow/Outflow Hydrograph Summary
ft³/s109.19Flow (Peak In) min721.00Time to Peak (Flow, In)
ft³/s48.60Flow (Peak Outlet) min729.00Time to Peak (Flow, Outlet)
ft350.55Elevation (Water Surface,
Peak)
ac-ft3.215Volume (Peak)
Mass Balance (ac-ft)
ac-ft0.916Volume (Initial)
ac-ft7.569Volume (Total Inflow)
ac-ft0.000Volume (Total Infiltration)
ac-ft7.452Volume (Total Outlet
Outflow)
ac-ft1.032Volume (Retained)
ac-ft-0.002Volume (Unrouted)
%0.0Error (Mass Balance)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC
CORNERS AT BRIER CREEK
TON-17020

STORMWATER MANAGEMENT FACILITY ‘E’
DESIGN CALCULATIONS

CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'E'
SSFxn Above NP
E. MAGOON, EI
8/26/2019
STAGE-STORAGE FUNCTION - ABOVE NORMAL POOL
Average Incremental Accumulated Estimated
Contour Contour Contour Contour Stage
Contour Stage Area Area Volume Volume w/ S-S Fxn
(feet)(feet)(SF)(SF)(CF)(CF)(feet)
356.0 0.00 22,980
356.5 0.50 26,924 24952 12476 12476 0.51
358.0 2.00 30,679 28802 43202 55678 1.95
360.0 4.00 35,828 33254 66507 122185 3.96
362.0 6.00 41,203 38516 77031 199216 6.14
1.110283385 10.1864516
26541.14893
KS = 26541
b =1.1103
y = 26541x1.1103
R² = 0.9996
0
50000
100000
150000
200000
250000
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00Storage (CF)Stage (feet)
Storage vs. Stage
CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'E'
SSFxn Main Pool
E. MAGOON, EI
8/26/2019
STAGE-STORAGE FUNCTION - MAIN POOL
Average Incremental Accumulated Estimated
Contour Contour Contour Contour Stage
Contour Stage Area Area Volume Volume w/ S-S Fxn
(feet)(feet)(SF)(SF)(CF)(CF)(feet)
351.0 0.00 10,422
352.0 1.00 11,336 10879 10879 10879 1.00
354.0 3.00 13,248 12292 24584 35463 2.96
355.5 4.50 14,746 13997 20996 56459 4.54
356.0 5.00 17,094 15920 7960 64419 5.12
1.090777962 9.291046456
10840.52229
KS = 10841
b =1.0908
y = 10809x1.0999
R² = 0.9997
0
10000
20000
30000
40000
50000
60000
70000
0.00 1.00 2.00 3.00 4.00 5.00 6.00Storage (CF)Stage (feet)
Storage vs. Stage
CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'E'
SSFxn Forebay
E. MAGOON, EI
8/26/2019
STAGE-STORAGE FUNCTION - FOREBAY
Average Incremental Accumulated Estimated
Contour Contour Contour Contour Stage
Contour Stage Area Area Volume Volume w/ S-S Fxn
(feet)(feet)(SF)(SF)(CF)(CF)(feet)
352.0 0.00 2,139
354.0 2.00 3,178 2659 5317 5317 2.00
355.5 3.50 4,074 3626 5439 10756 3.46
356.0 4.00 5,501 4788 2394 13150 4.04
1.292436097 7.679793388
2164.172582
KS = 2164.2
b =1.2924
y = 2164.2x1.2924
R² = 0.9991
0
2000
4000
6000
8000
10000
12000
14000
0.00 1.00 2.00 3.00 4.00 5.00Storage (CF)Stage (feet)
Storage vs. Stage
CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'E'
Volume Calculation
E. MAGOON, EI
8/26/2019
TOTAL VOLUME OF FACILITY
Volume of Main Pool =56,459 cf
Volume of Forebay =13,150 cf
Total Volume Below NWSE =69,608 cf
=1.60 acre-ft
Total Volume Above NWSE =199,216 cf
=4.57 acre-ft
Total Volume of Facility =268,825 cf
=6.17 acre-ft
FOREBAY PERCENTAGE OF PERMANENT POOL VOLUME
total permanent pool volume.
Total Volume Below NWSE =69,608 cf
Volume of Forebay =13,150 cf
% Forebay =18.9%
AVERAGE DEPTH OF POND
Total Volume Below NWSE =69,608 cf
Surface Area at NWSE =22,980 sf
Average Depth =3.03 ft
Per NCDWQ design guidelines, the forebay volume should equal approximately 20% of the
CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'E'
Surface Area Calculation
E. MAGOON, EI
8/26/2019
WET DETENTION BASIN SUMMARY
From Stormwater Best Management Practices Manual . NCDENR: Division of Water Quality.
Enter the drainage area characteristics ==>
11.89 acres
7.24 acres
Note The basin must be sized to treat all impervious surface runoff draining into the pond, not just the impervious
surface from on-site development.
Drainage area =11.89 acres @ 60.9%impervious
Estimate the surface area required at pond normal pool elevation ==>
Wet Detention Basins are based on an minimum average depth of =3.03 feet (Calculated)
From the DWQ BMP Handbook, the required SA/DA ratio for 90%TSS Removal ==>
3.0 3.03 3.5
Lower Boundary =>60.0 3.50 3.20
Site % impervious =>60.9 3.54 3.53 3.24
Upper Boundary =>70.0 4.00 3.70
Therefore, SA/DA required =3.53
Surface area required at normal pool = 18,265 ft2
=0.42 acres
Surface area provided at normal pool = 22,980 ft2
Total drainage area to pond =
Total impervious area to pond =
CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'E'
WQV Calculation
E. MAGOON, EI
8/26/2019
DETERMINATION OF WATER QUALITY VOLUME
WQ V = (P)(R V )(A)/12
where,
WQV = water quality volume (in acre-ft)
RV = 0.05+0.009(I) where I is percent impervious cover
A = area in acres
P = rainfall (in inches)
Input data:
Total area, A =11.89 acres
Impervious area =7.24 acres
Percent impervious cover, I =60.9 %
Rainfall, P =1.00 inches
Calculated values:
RV = 0.60
WQV = 0.59 acre-ft
=25806 cf.
ASSOCIATED DEPTH IN POND
WQV = 25806 cf.
Stage / Storage Data:
Ks =26541
b =1.110
Zo =356.00
Volume in 1" rainfall =25806 cu. ft
Calculated values:
Depth of WQv in Basin =0.98 ft
=11.70 inches
Elevation =356.98 ft
CORNERS AT BRIER CREEK
TON-17020
STORMWATER CONTROL MEASURE 'E'
WQV Drawdown Calculation
E. MAGOON, EI
8/26/2019
DRAWDOWN ORIFICE DESIGN
D orifice =2.75 inch
# orifices =1
Ks =26541
b =1.1103
Cd orifice =0.60
Normal Pool Elevation =356.00 feet
Volume @ Normal Pool =0 cf
Orifice Invert =356.00 feet
WSEL @ 1" Runoff Volume =356.98 feet
WSEL Vol. Stored Orifice Flow Avg. Flow Incr. Vol.Incr. Time
(feet)(cf)(cfs)(cfs)(cf)(sec)
356.98 25806 0.184
356.89 23314 0.175 0.179 2493 13905.47
356.80 20847 0.165 0.170 2466 14538.85
356.72 18409 0.154 0.159 2438 15288.39
356.63 16003 0.143 0.149 2406 16196.18
356.55 13633 0.131 0.137 2370 17329.76
356.46 11303 0.117 0.124 2330 18806.35
356.38 9020 0.102 0.109 2283 20853.25
356.29 6793 0.084 0.093 2227 23993.57
356.21 4638 0.058 0.071 2155 30374.93
356.12 2581 0.026 0.042 2057 48705.15
Drawdown Time =2.55 days
By comparison, if calculated by the average head over the orifice
(assuming average head is half the total depth), the result would be:
Average driving head on orifice = 0.287 feet
Orifice composite loss coefficient = 0.600
Cross-sectional area of siphon = 0.041 sf
Q =0.1064 cfs
Drawdown Time = Volume / Flowrate / 86400 (sec/day)
Drawdown Time = 2.81 days
Storm Event: 1-YRLabel: SWMF E
Return Event: 1 yearsSubsection: Elevation-Area Volume Curve
Volume (Total)
(ac-ft)
Volume
(ac-ft)
A1+A2+sqr
(A1*A2)
(ft²)
Area
(ft²)
Planimeter
(ft²)
Elevation
(ft)
0.0000.000022,9800.0356.00
0.2860.28674,77826,9240.0356.50
1.2770.99186,34330,6790.0358.00
2.8021.52599,66135,8280.0360.00
4.5691.767115,45341,2030.0362.00
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF E
Return Event: 1 yearsSubsection: Outlet Input Data
Requested Pond Water Surface Elevations
ft356.00Minimum (Headwater)
ft0.10Increment (Headwater)
ft362.00Maximum (Headwater)
Outlet Connectivity
E2
(ft)
E1
(ft)
OutfallDirectionOutlet IDStructure Type
358.50358.00CulvertForwardWeir - AORectangular Weir
362.00358.50CulvertForwardOrificeOrifice-Area
362.00360.00CulvertForwardRiserInlet Box
362.00356.00CulvertForwardOrifice -
WQ
Orifice-Circular
362.00356.00TWForwardCulvertCulvert-Circular
(N/A)(N/A)TailwaterTailwater Settings
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF E
Return Event: 1 yearsSubsection: Outlet Input Data
Structure ID: Culvert
Structure Type: Culvert-Circular
1Number of Barrels
in24.000Diameter
ft50.00Length
ft50.01Length (Computed Barrel)
ft/ft0.020Slope (Computed)
Outlet Control Data
0.013Manning's n
0.5Ke
0.0Kb
0.0Kr
ft0.00Convergence Tolerance
Inlet Control Data
Form 1Equation Form
0.0098K
2.0000M
0.0398C
0.6700Y
1.2T1 ratio (HW/D)
1.3T2 ratio (HW/D)
-0.5Slope Correction Factor
Use unsubmerged inlet control 0 equation below T1 elevation.
Use submerged inlet control 0 equation above T2 elevation
In transition zone between unsubmerged and submerged inlet
control,
interpolate between flows at T1 & T2...
ft358.30T1 Elevation ft³/s15.55T1 Flow
ft358.59T2 Elevation ft³/s17.77T2 Flow
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF E
Return Event: 1 yearsSubsection: Outlet Input Data
Structure ID: Riser
Structure Type: Inlet Box
1Number of Openings
ft360.00Elevation
ft²16.0Orifice Area
0.6Orifice Coefficient
ft16.00Weir Length
(ft^0.5)/s3.00Weir Coefficient
1.0K Reverse
0.0Manning's n
0.0Kev, Charged Riser
FalseWeir Submergence
FalseOrifice H to crest
Structure ID: Orifice - WQ
Structure Type: Orifice-Circular
1Number of Openings
ft356.00Elevation
in2.750Orifice Diameter
0.6Orifice Coefficient
Structure ID: Orifice
Structure Type: Orifice-Area
1Number of Openings
ft358.00Elevation
ft²1.0Orifice Area
ft358.50Top Elevation
ft358.25Datum Elevation
0.6Orifice Coefficient
Structure ID: Weir - AO
Structure Type: Rectangular Weir
1Number of Openings
ft358.00Elevation
ft2.00Weir Length
(ft^0.5)/s3.00Weir Coefficient
Structure ID: TW
Structure Type: TW Setup, DS Channel
Free OutfallTailwater Type
Convergence Tolerances
30Maximum Iterations
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF E
Return Event: 1 yearsSubsection: Outlet Input Data
Convergence Tolerances
ft0.01Tailwater Tolerance
(Minimum)
ft0.50Tailwater Tolerance
(Maximum)
ft0.01Headwater Tolerance
(Minimum)
ft0.50Headwater Tolerance
(Maximum)
ft³/s0.001Flow Tolerance (Minimum)
ft³/s10.000Flow Tolerance (Maximum)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF E
Return Event: 1 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
(no Q: Weir -
AO,Orifice,Riser,Orifice -
WQ,Culvert)
0.00(N/A)0.00356.00
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.01356.10
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.05356.20
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.08356.30
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.10356.40
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.11356.50
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.13356.60
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.14356.70
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.15356.80
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.16356.90
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.18357.00
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.19357.10
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.19357.20
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.20357.30
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.21357.40
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.22357.50
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.23357.60
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.24357.70
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.25357.80
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.25357.90
Orifice - WQ,Culvert (no
Q: Weir - AO,Orifice,Riser)
0.00(N/A)0.26358.00
Weir - AO,Orifice -
WQ,Culvert (no Q:
Orifice,Riser)
0.00(N/A)0.45358.10
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF E
Return Event: 1 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
Weir - AO,Orifice -
WQ,Culvert (no Q:
Orifice,Riser)
0.00(N/A)0.79358.20
Weir - AO,Orifice -
WQ,Culvert (no Q:
Orifice,Riser)
0.00(N/A)1.22358.30
Weir - AO,Orifice -
WQ,Culvert (no Q:
Orifice,Riser)
0.00(N/A)1.72358.40
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)2.66358.50
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)3.10358.60
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)3.48358.70
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)3.83358.80
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)4.14358.90
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)4.43359.00
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)4.72359.10
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)4.97359.20
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)5.22359.30
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)5.45359.40
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)5.68359.50
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)5.89359.60
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)6.10359.70
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF E
Return Event: 1 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)6.30359.80
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)6.50359.90
Orifice,Orifice -
WQ,Culvert (no Q: Weir -
AO,Riser)
0.00(N/A)6.68360.00
Orifice,Riser,Orifice -
WQ,Culvert (no Q: Weir -
AO)
0.00(N/A)8.37360.10
Orifice,Riser,Orifice -
WQ,Culvert (no Q: Weir -
AO)
0.00(N/A)11.31360.20
Orifice,Riser,Orifice -
WQ,Culvert (no Q: Weir -
AO)
0.00(N/A)14.90360.30
Orifice,Riser,Orifice -
WQ,Culvert (no Q: Weir -
AO)
0.00(N/A)18.61360.40
Orifice,Riser,Orifice -
WQ,Culvert (no Q: Weir -
AO)
0.00(N/A)22.36360.50
Orifice,Riser,Orifice -
WQ,Culvert (no Q: Weir -
AO)
0.00(N/A)26.04360.60
Orifice,Riser,Orifice -
WQ,Culvert (no Q: Weir -
AO)
0.00(N/A)28.86360.70
Riser,Culvert (no Q: Weir
- AO,Orifice,Orifice - WQ)
0.00(N/A)29.37360.80
Riser,Culvert (no Q: Weir
- AO,Orifice,Orifice - WQ)
0.00(N/A)29.80360.90
Riser,Culvert (no Q: Weir
- AO,Orifice,Orifice - WQ)
0.00(N/A)30.21361.00
Riser,Culvert (no Q: Weir
- AO,Orifice,Orifice - WQ)
0.00(N/A)30.61361.10
Riser,Culvert (no Q: Weir
- AO,Orifice,Orifice - WQ)
0.00(N/A)31.02361.20
Riser,Culvert (no Q: Weir
- AO,Orifice,Orifice - WQ)
0.00(N/A)31.42361.30
Riser,Culvert (no Q: Weir
- AO,Orifice,Orifice - WQ)
0.00(N/A)31.81361.40
Riser,Culvert (no Q: Weir
- AO,Orifice,Orifice - WQ)
0.00(N/A)32.20361.50
Riser,Culvert (no Q: Weir
- AO,Orifice,Orifice - WQ)
0.00(N/A)32.58361.60
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF E
Return Event: 1 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
Riser,Culvert (no Q: Weir
- AO,Orifice,Orifice - WQ)
0.00(N/A)32.96361.70
Riser,Culvert (no Q: Weir
- AO,Orifice,Orifice - WQ)
0.00(N/A)33.33361.80
Riser,Culvert (no Q: Weir
- AO,Orifice,Orifice - WQ)
0.00(N/A)33.70361.90
Riser,Culvert (no Q: Weir
- AO,Orifice,Orifice - WQ)
0.00(N/A)34.07362.00
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 1-YRLabel: SWMF E (IN)
Return Event: 1 yearsSubsection: Level Pool Pond Routing Summary
Infiltration
No InfiltrationInfiltration Method
(Computed)
Initial Conditions
ft356.00Elevation (Water Surface,
Initial)
ac-ft0.000Volume (Initial)
ft³/s0.00Flow (Initial Outlet)
ft³/s0.00Flow (Initial Infiltration)
ft³/s0.00Flow (Initial, Total)
min1.00Time Increment
Inflow/Outflow Hydrograph Summary
ft³/s38.18Flow (Peak In) min721.00Time to Peak (Flow, In)
ft³/s0.65Flow (Peak Outlet) min1,081.00Time to Peak (Flow, Outlet)
ft358.16Elevation (Water Surface,
Peak)
ac-ft1.390Volume (Peak)
Mass Balance (ac-ft)
ac-ft0.000Volume (Initial)
ac-ft1.853Volume (Total Inflow)
ac-ft0.000Volume (Total Infiltration)
ac-ft0.509Volume (Total Outlet
Outflow)
ac-ft1.344Volume (Retained)
ac-ft-0.001Volume (Unrouted)
%0.0Error (Mass Balance)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 2-YRLabel: SWMF E (IN)
Return Event: 2 yearsSubsection: Level Pool Pond Routing Summary
Infiltration
No InfiltrationInfiltration Method
(Computed)
Initial Conditions
ft356.00Elevation (Water Surface,
Initial)
ac-ft0.000Volume (Initial)
ft³/s0.00Flow (Initial Outlet)
ft³/s0.00Flow (Initial Infiltration)
ft³/s0.00Flow (Initial, Total)
min1.00Time Increment
Inflow/Outflow Hydrograph Summary
ft³/s47.48Flow (Peak In) min721.00Time to Peak (Flow, In)
ft³/s1.71Flow (Peak Outlet) min784.00Time to Peak (Flow, Outlet)
ft358.40Elevation (Water Surface,
Peak)
ac-ft1.563Volume (Peak)
Mass Balance (ac-ft)
ac-ft0.000Volume (Initial)
ac-ft2.376Volume (Total Inflow)
ac-ft0.000Volume (Total Infiltration)
ac-ft1.004Volume (Total Outlet
Outflow)
ac-ft1.371Volume (Retained)
ac-ft-0.001Volume (Unrouted)
%0.0Error (Mass Balance)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 10-YRLabel: SWMF E (IN)
Return Event: 10 yearsSubsection: Level Pool Pond Routing Summary
Infiltration
No InfiltrationInfiltration Method
(Computed)
Initial Conditions
ft356.00Elevation (Water Surface,
Initial)
ac-ft0.000Volume (Initial)
ft³/s0.00Flow (Initial Outlet)
ft³/s0.00Flow (Initial Infiltration)
ft³/s0.00Flow (Initial, Total)
min1.00Time Increment
Inflow/Outflow Hydrograph Summary
ft³/s66.44Flow (Peak In) min721.00Time to Peak (Flow, In)
ft³/s5.34Flow (Peak Outlet) min758.00Time to Peak (Flow, Outlet)
ft359.35Elevation (Water Surface,
Peak)
ac-ft2.283Volume (Peak)
Mass Balance (ac-ft)
ac-ft0.000Volume (Initial)
ac-ft3.793Volume (Total Inflow)
ac-ft0.000Volume (Total Infiltration)
ac-ft2.369Volume (Total Outlet
Outflow)
ac-ft1.422Volume (Retained)
ac-ft-0.001Volume (Unrouted)
%0.0Error (Mass Balance)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 100-yrLabel: SWMF E (IN)
Return Event: 100 yearsSubsection: Level Pool Pond Routing Summary
Infiltration
No InfiltrationInfiltration Method
(Computed)
Initial Conditions
ft356.00Elevation (Water Surface,
Initial)
ac-ft0.000Volume (Initial)
ft³/s0.00Flow (Initial Outlet)
ft³/s0.00Flow (Initial Infiltration)
ft³/s0.00Flow (Initial, Total)
min1.00Time Increment
Inflow/Outflow Hydrograph Summary
ft³/s87.29Flow (Peak In) min721.00Time to Peak (Flow, In)
ft³/s21.08Flow (Peak Outlet) min752.00Time to Peak (Flow, Outlet)
ft360.47Elevation (Water Surface,
Peak)
ac-ft3.192Volume (Peak)
Mass Balance (ac-ft)
ac-ft0.000Volume (Initial)
ac-ft6.018Volume (Total Inflow)
ac-ft0.000Volume (Total Infiltration)
ac-ft4.551Volume (Total Outlet
Outflow)
ac-ft1.465Volume (Retained)
ac-ft-0.002Volume (Unrouted)
%0.0Error (Mass Balance)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 100-yrLabel: SWMF E - WC
Return Event: 100 yearsSubsection: Outlet Input Data
Requested Pond Water Surface Elevations
ft356.00Minimum (Headwater)
ft0.10Increment (Headwater)
ft362.00Maximum (Headwater)
Outlet Connectivity
E2
(ft)
E1
(ft)
OutfallDirectionOutlet IDStructure Type
362.00358.50CulvertForwardOrificeOrifice-Area
362.00360.00CulvertForwardRiserInlet Box
358.50358.00CulvertForwardWeir - AORectangular Weir
362.00356.00TWForwardCulvertCulvert-Circular
(N/A)(N/A)TailwaterTailwater Settings
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC
Storm Event: 100-yrLabel: SWMF E - WC
Return Event: 100 yearsSubsection: Outlet Input Data
Structure ID: Culvert
Structure Type: Culvert-Circular
1Number of Barrels
in24.000Diameter
ft50.00Length
ft50.01Length (Computed Barrel)
ft/ft0.020Slope (Computed)
Outlet Control Data
0.013Manning's n
0.5Ke
0.0Kb
0.0Kr
ft0.00Convergence Tolerance
Inlet Control Data
Form 1Equation Form
0.0098K
2.0000M
0.0398C
0.6700Y
1.2T1 ratio (HW/D)
1.3T2 ratio (HW/D)
-0.5Slope Correction Factor
Use unsubmerged inlet control 0 equation below T1 elevation.
Use submerged inlet control 0 equation above T2 elevation
In transition zone between unsubmerged and submerged inlet
control,
interpolate between flows at T1 & T2...
ft358.30T1 Elevation ft³/s15.55T1 Flow
ft358.59T2 Elevation ft³/s17.77T2 Flow
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC
Storm Event: 100-yrLabel: SWMF E - WC
Return Event: 100 yearsSubsection: Outlet Input Data
Structure ID: Riser
Structure Type: Inlet Box
1Number of Openings
ft360.00Elevation
ft²16.0Orifice Area
0.6Orifice Coefficient
ft16.00Weir Length
(ft^0.5)/s3.00Weir Coefficient
1.0K Reverse
0.0Manning's n
0.0Kev, Charged Riser
FalseWeir Submergence
FalseOrifice H to crest
Structure ID: Orifice
Structure Type: Orifice-Area
1Number of Openings
ft358.00Elevation
ft²1.0Orifice Area
ft358.50Top Elevation
ft358.25Datum Elevation
0.6Orifice Coefficient
Structure ID: Weir - AO
Structure Type: Rectangular Weir
1Number of Openings
ft358.00Elevation
ft2.00Weir Length
(ft^0.5)/s3.00Weir Coefficient
Structure ID: TW
Structure Type: TW Setup, DS Channel
Free OutfallTailwater Type
Convergence Tolerances
30Maximum Iterations
ft0.01Tailwater Tolerance
(Minimum)
ft0.50Tailwater Tolerance
(Maximum)
ft0.01Headwater Tolerance
(Minimum)
ft0.50Headwater Tolerance
(Maximum)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC
Storm Event: 100-yrLabel: SWMF E - WC
Return Event: 100 yearsSubsection: Outlet Input Data
Convergence Tolerances
ft³/s0.001Flow Tolerance (Minimum)
ft³/s10.000Flow Tolerance (Maximum)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC
Storm Event: 100-yrLabel: SWMF E - WC
Return Event: 100 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00356.00
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00356.10
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00356.20
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00356.30
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00356.40
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00356.50
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00356.60
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00356.70
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00356.80
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00356.90
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00357.00
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00357.10
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00357.20
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00357.30
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00357.40
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00357.50
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00357.60
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00357.70
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00357.80
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00357.90
(no Q: Orifice,Riser,Weir
- AO,Culvert)
0.00(N/A)0.00358.00
Weir - AO,Culvert (no Q:
Orifice,Riser)
0.00(N/A)0.19358.10
Weir - AO,Culvert (no Q:
Orifice,Riser)
0.00(N/A)0.53358.20
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC
Storm Event: 100-yrLabel: SWMF E - WC
Return Event: 100 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
Weir - AO,Culvert (no Q:
Orifice,Riser)
0.00(N/A)0.96358.30
Weir - AO,Culvert (no Q:
Orifice,Riser)
0.00(N/A)1.46358.40
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)2.41358.50
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)2.85358.60
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)3.23358.70
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)3.57358.80
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)3.88358.90
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)4.17359.00
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)4.43359.10
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)4.69359.20
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)4.93359.30
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)5.16359.40
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)5.39359.50
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)5.60359.60
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)5.80359.70
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)5.99359.80
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)6.18359.90
Orifice,Culvert (no Q:
Riser,Weir - AO)
0.00(N/A)6.37360.00
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00(N/A)8.06360.10
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00(N/A)11.01360.20
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00(N/A)14.66360.30
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00(N/A)18.39360.40
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00(N/A)22.23360.50
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
Storm Event: 100-yrLabel: SWMF E - WC
Return Event: 100 yearsSubsection: Composite Rating Curve
Composite Outflow Summary
Contributing StructuresConvergence Error
(ft)
Tailwater Elevation
(ft)
Flow
(ft³/s)
Water Surface
Elevation
(ft)
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00(N/A)25.92360.60
Orifice,Riser,Culvert (no
Q: Weir - AO)
0.00(N/A)28.82360.70
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00(N/A)29.37360.80
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00(N/A)29.80360.90
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00(N/A)30.21361.00
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00(N/A)30.61361.10
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00(N/A)31.02361.20
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00(N/A)31.42361.30
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00(N/A)31.81361.40
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00(N/A)32.20361.50
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00(N/A)32.58361.60
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00(N/A)32.96361.70
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00(N/A)33.33361.80
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00(N/A)33.70361.90
Riser,Culvert (no Q:
Orifice,Weir - AO)
0.00(N/A)34.07362.00
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC
Storm Event: 100-yrLabel: SWMF E (IN)
Return Event: 100 yearsSubsection: Level Pool Pond Routing Summary
Infiltration
No InfiltrationInfiltration Method
(Computed)
Initial Conditions
ft360.00Elevation (Water Surface,
Initial)
ac-ft2.802Volume (Initial)
ft³/s6.37Flow (Initial Outlet)
ft³/s0.00Flow (Initial Infiltration)
ft³/s6.37Flow (Initial, Total)
min1.00Time Increment
Inflow/Outflow Hydrograph Summary
ft³/s87.29Flow (Peak In) min721.00Time to Peak (Flow, In)
ft³/s28.09Flow (Peak Outlet) min732.00Time to Peak (Flow, Outlet)
ft360.67Elevation (Water Surface,
Peak)
ac-ft3.371Volume (Peak)
Mass Balance (ac-ft)
ac-ft2.802Volume (Initial)
ac-ft6.018Volume (Total Inflow)
ac-ft0.000Volume (Total Infiltration)
ac-ft7.315Volume (Total Outlet
Outflow)
ac-ft1.504Volume (Retained)
ac-ft-0.001Volume (Unrouted)
%0.0Error (Mass Balance)
8/21/2019TON17020.ppc
E. Magoon, EICorners at Brier Creek
WC