SW3161003_Weddington Acres Calculations_20200706

II�CI<SON
community infrastructure consultants
Weddington Acres
WKD # 20160191.00.CL
CALCULATIONS FOR:
Storm Water and Erosion Control
DATE: 9/19/2018
REV: 5/27/2020
p � 'EAL �
512a40
610 COLONNADE DRIVE CHARLOTTE, NORTH CAROLINA 28205
TEL [phone] FAX [phone] www.WKDickson.com

Weddington Acres
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community infrastructure consultants
PROJECT NO.: 20160191.00.CL
BY: CJH
DATE: 911912018
T.M.: WGB
REVISED: 512712020
P.M.: WGB
PRE/POST DEVELOPMENT CURVE NUMBERS
CURVE NUMBER:
f Predeveloped CN
Pre #1 - POI #1
Cover Type
Area (SF)
%
CN Wtd. CN
Woods HSG B
373309
1 0.90
49.25
Woods/Grass HSG D
43560
0.10
8.25
Total
416869
1.00
57.51
Composite CN
57.51
Use CN =
rPredeveloped CN
Pre #2 - POI #1
Cover Type
Area (SF)
%
CN Wtd. CN
Woods HSG B
365294
0.81
1
44.41
Woods/Grass HSG D
87120
0.19
15.21
Total
452414
1.00
59.62
Composite CN
59.62j
1 Use CN =
f Predeveloped CN
Pre #3 - POI #1
Cover Type
Area (SF)
%
CN Wtd. CN
Woods
499633
0.68
37.31
Brush
236922
0.32
18.01
Total
736555
1.00
55.32
Composite CN
55.32 11
1 Use CN =
rPredeveloped CN
POI #2
Cover Type
Area SF % CN Wtd. CN
194103
1.00 1
65.00
Total
194103
1.00
65.00
Composite CN
65.00
Use CN = �a
Predeveloped CN
POI #3
Cover Type
Area SF
%
CN Wtd. CN
Woods
302652
0.98
1
63.74
Pavement
596
0.02
1.89
Total
308617
1.00
65.64
Composite CN
65.64
Use CN =
f Predeveloped CN POI #4
Cover Type Area (SF) % CN Wtd. CN
Woods
0.95
61.55
Pavement
0.05
5.20
Total
110811
0.95
66.75
Composite CN
66.75
Use CN =

Weddington Acres
��WI<
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community infrastructure consultants
PROJECT NO.: 20160191.00.cL
BY: CJH
DATE: 911912018
T.M.: WGB
REVISED: 512712020
P.M.: WGB
PRE/POST DEVELOPMENT CURVE NUMBERS
rPostdeveloped CN
BMP #1
Cover Type
Area SF
%
CN
Wtd. CN
Pavement/Concrete
29133
0.04
98
3.97
Buildings
82500
0.11
98
11.25
Grass/Woods
548982
0.76
58
44.30
Grass
36155
0.05
61
3.07
Permanent Pool
21970
0.03
98
3.00
Total
718740
1 1.00
65.59
Composite CN
65.59
Use CN =
Postdeveloped CN
BMP #2
Cover Type
Area SF
%
CN
Wtd. CN
Pavement/Concrete
10727
0.05
98
4.60
Buildings
44000
0.19
98
18.86
Grass/Woods
9583
0.04
79
3.31
Grass/Woods
152523
0.67
58
38.68
Permanent Pool
11857
0.05
1 98
1 5.08
Total
1 228690
1 1.00
1 70.53
Composite CN
70.53
Use CN =
7
rPostdeveloped CN
BYPASS #1 - POI #1
Cover Type
Area SF
%
CN Wtd. CN
Grass/Woods HSG B
284819
0.93
1
53.88
Brush HSG D
21780
0.07
5.19
Total
306599
1.00
59.07771
Composite CN
59.07
Use CN = 59
Postdeveloped CN
BYPASS #2 - POI #1
Cover Type
Area (SF)
%
CN Wtd. CN
3rass/Woods HSG B
HSG D
522709
1 0.85
49.01
95832
1 0.15
11.31
Total
618541
1 1.00
60.32
Composite CN
60.32
Use CN =
rPostdeveloped CN
BYPASS POI #2
Cover Type
Area (SF) % CN Wtd. CN
Grass HSG B
67082
1.00 1
65.00
Total
67082
1.00
65.00
Composite CN
65.00
Use CN =
Postdeveloped CN
BYPASS POI #3
Cover Type
Area SF
%
CN Wtd. CN
Grass/Woods HSG B
Pavement HSG B
188089
1 0.93
1
60.55
138`
1 0.07
6.71
Total
201918
1 1.00
67.26
Composite CN
67.26
11
Use CN =

Weddington Acres
��WI< �+ `,
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community infrastructure consultants
PROJECT NO.: 20160191.00.CL
BY: CJH
DATE: 911912018
T.M.: WGB
REVISED: 512712020
P.M.: WGB
PRE/POST DEVELOPMENT CURVE NUMBERS
Postdeveloped CN
BYPASS POI #4
Cover Type
Area (SF)
%
CN Wtd. CN
Grass HSG B
63602
1 0.81
49.58
Pavement HSG B
14649
0.19
18.35
Total
78251
1.00
67.93
Composite CN
67.93 11
Use CN =

Weddington Acres
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cominunlly Inlrasl ructum consultunfs
PROJECT NO.: 160191.00.CL
BY: CJH
DATE: 9/19/2018
T.M.: WGB
REVISED: 512712020
P.M.: WGB
IMPERVI
Impervious Calculations for Basins
BMP1
Drainage Area 16.50 acres
Impervious Areas
Right of Way (paving, curb, sidewalk)=
29133 sf
# Lots sf/lot
Lots (building, sidewalk, concrete patios, driveways, etc.)=
82500 sf
15 5500
Total Impervious=
111633 sf
Percent Impervious=
15.53%
BMP 2
Drainage Area 5.25 acres
Impervious Areas
Right of Way (paving, curb, sidewalk)=
10727 sf
# Lots sf/lot
Lots (building, sidewalk, concrete patios, driveways, etc.)=
44000 sf
8.0 5500
Total Impervious=
54727 sf
Percent Impervious=
23.93%

Weddington Acres A/K
PROJECT NO.: 20160191.00.CL BY: CJH - 1D I CA<SO N
DATE: 09119118 T.M: WGB community infrastructure consultants
REVISED: 05127120 P.M.: WGB DRAINAGE AREA & WETPOND SUMMARY
STORM WATER
PRE-DEVELOPMENT/POST-DEVELOPMENT TABLE
1 YEAR
2 YEAR
PRE CFS
POST CFS
DELTA
PRE CFS
POST CFS
DELTA
POI #1
3.40
3.36
-0.04
9.78
8.14
-1.64
POI #2
1.78
0.63
-1.15
3.34
1.18
-2.16
POI #3
3.03
2.66
-0.37
5.49
4.64
-0.85
POI #4
1.41
0.8
-0.61
2.46
1.39
-1.07
10 YEAR
25 YEAR
PRE CFS
POST CFS
DELTA
PRE(CFS)
POST CFS
DELTA
POI #1
38.27
32.32
-5.95
60.96
53.45
-7.51
POI #2
8.63
3.06
-5.57
12.33
4.37
-7.96
POI #3
13.71
11.05
-2.66
19.43
15.46
-3.97
POI #4
5.88
3.29
-2.59
8.23
4.59
-3.64
50 YEAR
100 YEAR
PRE CFS
POST CFS
DELTA
PRE CFS
POST CFS
DELTA
POI #1
80.67
75.24
-5.43
102.39
99.55
-2.84
POI #2
15.45
5.47
-9.98
18.81
6.66
-12.15
POI #3
24.23
19.18
-5.05
29.38
23.13
-6.25
POI #4
10.19
5.68
-4.51
12.29
6.84
-5.45
Free Board Check
Peak Elv. (100YR)
Top of Berm
Freeboad ft
BMP 1
714.20
716.00
1.80
BMP 2
700.87
703.00
2.13
• Per Town of Weddington Stormwater Design Manual a minimum of 1.00' freeboard required
• Per NCDEQ Stormwater Design Manual a minimum of 1.00' freeboard required
PRE -DEVELOPMENT AREA I PRE -DEVELOPMENT AREA
DRAINAGE BASIN
AREA (AC.)
Pre #1
9.57
Pre #2
10.39
Pre #3
16.91
Total
36.87
DRAINAGE BASIN
AREA (AC.)
POI #2
4.46
POI #3
7.08
POI #4
2.54
Total
14.08
POST -DEVELOPMENT AREA I POST -DEVELOPMENT AREA
DRAINAGE BASIN
AREA (AC.)
BMP #1
16.50
BMP #2
5.25
By -Pass #1
7.04
By -Pass #2
14.20
TOTAL
42.99
DRAINAGE BASIN
AREA (AC.)
POI #2
1.54
POI #3
4.64
POI #4
1.79
Total
7.97

Weddington Acres oftwK
PROJECT NO. 20160191.00.cL BY: CJH W 1D 1 (,— 1<SO N
DATE: 09/19/18 T.M: WGB community Infrastructure consultants
REVISED: 05127120 P.M.: wGp__j, PRELIMINARY CALCULATIONS
PRE DRAINAGE AREA #1 - TIME OF CONCENTRATION
PRE -DEVELOPMENT
Pre -development
Flow Phase One
Type: Sheet Flow
Length: 100 ft
"N" Value: 0.4 from tables
Slope: 0,07 ft/ft
Computed 'T' 13.2 Minutes
Pre -development Type: Shallow Concentrated Flow
Flow Phase Two Surface: u
Length: 391 ft
u=unpaved Slope: 0.026 ft/ft
p=paved Velocity: 2.58_ft/sec
Computed 'T'. 0.042 hr, or 11 2.52 Minutes
Pre -development I Type: Open Channel Flow
Flow Phase Three Length: ft
Velocity: F ft/sec (assumed)
Computed 'T'. 0.047 hr, or 2.8 Minutes
Pre -development
Total Flow
Summary
Time of Concentration
Total T , - 18.5 Minutes
Lag Time
T LAG = 11.1 Minutes
T LAG =0.6 x T 11TLAG
= 0.19 Hours

Weddington Acres oftwK
PROJECT NO.'60191.00.cL BY: CJH W 1D I (,— I<SQ N
DATE: 091191181 T.M: WGB community infrastructure consultants
REVISED: 05127120 P.M.: WGB PRELIMINARY CALCULATIONS
PRE DRAINAGE AREA #2 - TIME OF CONCENTRATION
PRE -DEVELOPMENT
Pre -development
Flow Phase One
I Type: Sheet Flow
Length: 100 ft
"N" Value: 0.4 from tables
Slope: 0.04 ft/ft
Computed 'T' 16.5 Minutes j
Pre -development Type: Shallow Concentrated Flow
Flow Phase Two Surface: u
Length: 457 ft
u=unpaved Slope: 0.047 ft/ft
p=paved Velocity: 3.5 ft/sec
11 Computed 'T'. 0.036 hr, or 11 2.16 Minutes 11
J
Pre -development F Type: Open Channel Flow
Flow Phase Three Length: 1556 ft
Velocity: 5 ft/sec (assumed)
Computed 'T': 0.086 hr, or 5.2 Minutes
Pre -development
Total Flow
Summary
I Time of Concentration
F Total Tc= 23.8 Minutes
I Lag Time
T LAG = 14.3 Minutes
T LAG =0.6 x T ,
TLAG = 0.24 Hours

Weddington Acres ��WK
PROJECT NO. 20160191.00.cL BY: CJH aW 1D I(_'_'11 KS<D V
DATE: 09/19/18 T.M: WGB community infrastructure consultants
REVISED: 05127120 P.M.: wGp__j, PRELIMINARY CALCULATIONS
PRE DRAINAGE AREA #3 - TIME OF CONCENTRATION
PRE -DEVELOPMENT
Pre -development
Flow Phase One
Type: Sheet Flow
Length: 100 ft
"N" Value: 0.4 from tables
Slope: 0.035 ft/ft
Computed 'T' 17.4 Minutes
Pre -development Type: Shallow Concentrated Flow
Flow Phase Two Surface: u
Length: 453 ft
u=unpaved Slope: 0.067 ft/ft
p=paved Velocity: 4.18_ft/sec
Computed 'T'. 0.03 hr, or 1.8 Minutes
Pre -development I Type: Open Channel Flow
Flow Phase Three Length: 1305 ft
Velocity: 5 ft/sec (assumed)
Computed 'T'. 0.073 hr, or 4.4 Minutes
Pre -development
Total Flow
Summary
Time of Concentration
Total T , - 23.6 Minutes
Lag Time
T LAG = 14.1 Minutes
T LAG =0.6 x T 11TLAG
= 0.24 Hours

Weddington Acres oftwK
PROJECT NO. 20160191.00.cL BY: CJH W 1D 1 (,— 1<SO N
DATE: 09/19/18 T.M: WGB community Infrastructure consultants
REVISED: 05127120 P.M.: wGp__j, PRELIMINARY CALCULATIONS
BYPASS POI #2 - TIME OF CONCENTRATION
PRE -DEVELOPMENT
Pre -development
Flow Phase One
I Type: Sheet Flow
Length: 100 ft
"N" Value: 0.4 from tables
Slope: 0.045 ft/ft
Computed 'T' 15.7 Minutes
Pre -development Type: Shallow Concentrated Flow
Flow Phase Two Surface: u
Length: 49 ft
u=unpaved Slope: 0.040 ft/ft
p=paved Velocity: 3.23_ft/sec
Computed 'T'. 0.004 hr, or 0.24 Minutes
Pre -development I Type: Open Channel Flow
Flow Phase Three Length: ft
Velocity: ft/sec (assumed)
Computed 'T'. 0.041 hr, or 2.5 Minutes
Pre -development
Total Flow
Summary
Time of Concentration
Total T , - 18.4 Minutes
Lag Time
T LAG = 11.0 Minutes
T LAG =0.6 x T 11TLAG
= 0.18 Hours

Weddington Acres oftwK
PROJECT NO. 20160191.00.cL BY: CJH W 1D 1 (,— 1<SO N
DATE: 09/19/18 T.M: WGB community Infrastructure consultants
REVISED: 05127120 P.M.: wGp__j, PRELIMINARY CALCULATIONS
BYPASS POI #3 - TIME OF CONCENTRATION
PRE -DEVELOPMENT
Pre -development
Flow Phase One
Type: Sheet Flow
Length: ft
"N" Value: from tables
Slope: ft/ft
Computed 'T' 16.5 Minutes
Pre -development Type: Shallow Concentrated Flow
Flow Phase Two Surface: u
Length: 181 ft
u=unpaved Slope: 0.028 ft/ft
p=paved Velocity: 2.68_ft/sec
Computed 'T'. 0.019 hr, or 1.14 Minutes
Pre -development I Type: Open Channel Flow
Flow Phase Three Length: ft
Velocity: 5 ft/sec (assumed)
Computed 'T'. 0.039 hr, or 2.3 Minutes
Pre -development
Total Flow
Summary
Time of Concentration
Total T , - 20.0 Minutes
Lag Time
T LAG = 12.0 Minutes
T LAG =0.6 x T 11TLAG
= 0.20 Hours

Weddington Acres oftwK
PROJECT NO. 20160191.00.cL BY: CJH W 1D 1 (,— 1<SO N
DATE: 09/19/18 T.M: WGB community Infrastructure consultants
REVISED: 05127120 P.M.: wGp__j, PRELIMINARY CALCULATIONS
BYPASS POI #4 - TIME OF CONCENTRATION
PRE -DEVELOPMENT
Pre -development
Flow Phase One
Type: Sheet Flow
Length: ft
"N" Value: from tables
Slope: ft/ft
Computed 'T' 15.1 Minutes
Pre -development Type: Shallow Concentrated Flow
Flow Phase Two Surface: u
Length: 111 ft
u=unpaved Slope: 0.048 ft/ft
p=paved Velocity: 3.52_ft/sec
Computed 'T'. 0.009 hr, or 11 0.54 Minutes
Pre -development I Type: Open Channel Flow
Flow Phase Three Length: ft
Velocity: F ft/sec (assumed)
Computed 'T'. 0.004 hr, or 0.2 Minutes
Pre -development
Total Flow
Summary
Time of Concentration
Total T , - 15.9 Minutes
Lag Time
T LAG = 9.5 Minutes
T LAG =0.6 x T 11TLAG
= 0.16 Hours

Weddington Acres oftwK
PROJECT NO. 20160191.00.cL BY: CJH W 1D 1 (,— 1<SO N
DATE: 09/19/18 T.M: WGB community Infrastructure consultants
REVISED: 05127120 P.M.: wGp__j, PRELIMINARY CALCULATIONS
BYPASS DRAINAGE AREA #1 - TIME OF CONCENTRATION
POST -DEVELOPMENT
Pre -development
Flow Phase One
Type: Sheet Flow
Length: 100 ft
"N" Value: 0.4 from tables
Slope: 0.07 ft/ft
Computed 'T' 13.2 Minutes
Pre -development Type: Shallow Concentrated Flow
Flow Phase Two Surface: u
Length: 391 ft
u=unpaved Slope: 0.026 ft/ft
p=paved Velocity: 2.58_ft/sec
Computed 'T'. 0.042 hr, or 11 2.52 Minutes
Pre -development I Type: Open Channel Flow
Flow Phase Three Length: ft
Velocity: F ft/sec (assumed)
Computed 'T': 0.047 hr, or 2.8 Minutes
Pre -development
Total Flow
Summary
Time of Concentration
Total T , - 18.5 Minutes
Lag Time
T LAG = 11.1 Minutes
T LAG =0.6 x T 11TLAG
= 0.19 Hours

Weddington Acres oftwK
PROJECT NO. 20160191.00.cL BY: CJH W 1D 1 (,— 1<SO N
DATE: 09/19/18 T.M: WGB community Infrastructure consultants
REVISED: 05127120 P.M.: wGp__j, PRELIMINARY CALCULATIONS
BYPASS DRAINAGE AREA #2 - TIME OF CONCENTRATION
POST -DEVELOPMENT
Pre -development
Flow Phase One
Type: Sheet Flow
Length: 100 ft
"N" Value: 0.4 from tables
Slope: 0.045 ft/ft
Computed 'T' 15.7 Minutes
Pre -development Type: Shallow Concentrated Flow
Flow Phase Two Surface: u
Length: 436 ft
u=unpaved Slope: 0.041 ft/ft
p=paved Velocity: 3.28_ft/sec
Computed 'T'. 0.037 hr, or 11 2.22 Minutes
Pre -development I Type: Open Channel Flow
Flow Phase Three Length: ft
Velocity: ft/sec (assumed)
Computed 'T'. 0.086 hr, or 5.2 Minutes
Pre -development
Total Flow
Summary
Time of Concentration
Total T , - 23.1 Minutes
Lag Time
T LAc = 13.8 Minutes
T LAG =0.6 x T 11TLAG
= 0.23 Hours

Weddington Acres oftwK
PROJECT NO. 20160191.00.cL BY: CJH W 1D 1 (,— 1<SO N
DATE: 09/19/18 T.M: WGB community Infrastructure consultants
REVISED: 05127120 P.M.: wGp__j, PRELIMINARY CALCULATIONS
BYPASS POI #2 - TIME OF CONCENTRATION
POST -DEVELOPMENT
Pre -development
Flow Phase One
Type: Sheet Flow
Length: ft
"N" Value: from tables
Slope: ft/ft
Computed 'T' 16.5 Minutes
Pre -development Type: Shallow Concentrated Flow
Flow Phase Two Surface: u
Length: 88 ft
u=unpaved Slope: 0.023 ft/ft
p=paved Velocity: 2.43_ft/sec
Computed 'T'. 0.01 hr, or 0.6 Minutes
Pre -development I Type: Open Channel Flow
Flow Phase Three Length: 145 ft
Velocity: 5 ft/sec (assumed)
Computed 'T'. 0.008 hr, or 0.5 Minutes
Pre -development
Total Flow
Summary
Time of Concentration
Total T , - 17.6 Minutes
Lag Time
T LAG = 10.5 Minutes
T LAG =0.6 x T 11TLAG
= 0.18 Hours

Weddington Acres oftwK
PROJECT NO. 20160191.00.cL BY: CJH W 1D 1 (,— 1<SO N
DATE: 09/19/18 T.M: WGB community Infrastructure consultants
REVISED: 05127120 P.M.: wGp__j, PRELIMINARY CALCULATIONS
BYPASS POI #3 - TIME OF CONCENTRATION
POST -DEVELOPMENT
Pre -development
Flow Phase One
Type: Sheet Flow
Length: ft
"N" Value: from tables
Slope: ft/ft
Computed 'T' 11.4 Minutes
Pre -development Type: Shallow Concentrated Flow
Flow Phase Two Surface: u
Length: 188 ft
u=unpaved Slope: 0.029 ft/ft
p=paved Velocity: 2.76_ft/sec
Computed 'T'. 0.019 hr, or 1.14 Minutes
Pre -development I Type: Open Channel Flow
Flow Phase Three Length: ft
Velocity: 5 ft/sec (assumed)
Computed 'T'. 0.039 hr, or 2.3 Minutes
Pre -development
Total Flow
Summary
Time of Concentration
Total T , - 14.9 Minutes
Lag Time
T LAG = 8.9 Minutes
T LAG =0.6 x T 11TLAG
= 0.15 Hours

Weddington Acres oftwK
PROJECT NO. 20160191.00.cL BY: CJH W 1D 1 (,— 1<SO N
DATE: 09/19/18 T.M: WGB community Infrastructure consultants
REVISED: 05127120 P.M.: wGp__j, PRELIMINARY CALCULATIONS
BYPASS POI #4 - TIME OF CONCENTRATION
POST -DEVELOPMENT
Pre -development
Flow Phase One
I Type: Sheet Flow
Length: 100 ft
"N" Value: 0.4 from tables
Slope: 0.015 ft/ft
Computed 'T' 24.4 Minutes
Pre -development Type: Shallow Concentrated Flow
Flow Phase Two Surface: u
Length: 58 ft
u=unpaved Slope: 0.069 ft/ft
p=paved Velocity: 4.24_ft/sec
Computed 'T'. 0.004 hr, or 0.24 Minutes
Pre -development I Type: Open Channel Flow
Flow Phase Three Length: ft
Velocity: 5 ft/sec (assumed)
Computed 'T'. 0.015 hr, or 0.9 Minutes
Pre -development
Total Flow
Summary
Time of Concentration
Total T , - 25.5 Minutes
Lag Time
T LAG = 15.3 Minutes
T LAG =0.6 x T 11TLAG
= 0.26 Hours

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BY: CJH
�v1�ICsaN
DATE: 0 9118
T.M.: WGB
cor. Y,� i}y +r�rr¢str�ct�ro consult-ts
REVISED: 05127120
P.M.: WGB
WATER QUALITY BASIN CALCULATIONS -DRY POND 1
As designed pond areas
Storage Volumes
Cumulative
Elevation
Area(ac)
Volume(ac-ft)
709
0.212764004
0.00
710
0.24912764
0.23
711
0.287258953
0.50
712
0.327157943
0.80
713
0.36882461
1.15
714
0.412235996
1.54
715
0.45741506
1.98
716
0.5043618
2.46
Forbay Volume (CF)
0
Total Volume (CF)
107012
Forebay % of Pond
0.00
Permanent Pond Storage Volume
Elevation
(msl)
Forebay
(so
Forebay
(ac)
FB Volume
(cu-R)
FB Volume
(ac-ff)
Pond
("0
Pond
(ac)
Pond Volume
(cu-R)
Pond Volume
709
0.0000
0.0000
9268
0.2128
0.0000
710
�0
0.0000
�0
0.0000
10852
0.2491
10040
0.2305
711
0.0000
0.0000
12513
0.2873
21701
0.4982
712
�0
0.0000
�0
0.0000
14251
0.3272
35060
0.8049
713
0.0000
0.0000
16066
0.3688
50194
1.1523
714
�0
0.0000
�0
0.0000
17957
0.4t22
67t80
t.5422
715
0.0000
0.0000
19925
0.4574
86093
1.9764
716
000000000
000000000
000000000
000000000
000000000
�00000000
0.0000
0.0000
21970
0.5044
107012
2.4566
000000000
Interpolation to find elevation at which required storage volume is reached
Storage
Storage
Storage
Elev volume
area (ac.)
area (sf.)
710 0.23
0.25
10852
Elev 0.25
0.25
10983
711 0.50
0.29
12513
Elev= 710.08
Storage elevation = 1.08 feet above permanent pool elevation
Assume 2 day minimum
Determination of Orifice size for 2-5 day drawdown
a= 2A x sgrt(h) 'Falling head equation
Ct(sgrt(29))
a= Area of orifice
a sqft
t= Time to drawdown
259200 sec
A= Average pond surface area
5492 sf (3 day drawdown)
g= Gravity constant
32.2 ft/s^2
h= Change in head
1.08 ft
C= Orifice constant
0.6
Maximum orifice area =
0.01 sqft
Maximum orifice size =
1.29 inches
Selected orifice size =
1.30 inches

Weddington Acres wftwl<
PROJECT NO. 20160191.00.CL BY: CJH p G KSO N
DATE: 09119118 T.M: WGB community infrastructure consultants
REVISED: 05127120 P.M.: WGB FLOATATION CALCULATIONS - BMP #1
CONSTRAINTS:
Weight of Concrete
150 Ibs/ft^3
Weight of Water
62.4 lbs/ft^4
Safety Factor (S.F.)
1.1
Height of structure
6 ft
Structure thickness
6 in
Outlet box width (interior)
4 ft
Weight of outlet structurefWs)
Ws = (width + thickness x 4) x thickness x height x weight of concrete =
Weight of water displaced
Ww = ((width + 2 x thickness) A 2) x Weight of water x height = 9360 Ibs
Size Base
Wb = (S.F. x Ww) - Ws = 2196 Ibs
Footing size
Required concrete = Wb / (Weight of concrete -weight of water) = 25 cult
*Assume base is 6" wider than exterior box width and minimum thickness is 8".
Thickness of base = 0.83 ft
Length = 6.00 ft
Width = 6.00 ft
Thickness = 1.00 ft
8100 Ibs

Weddington Acres
NhwK
PROJECT NO.: 20160191.00.CL
BY: CJH
WDICKSON
DATE: 09/19/18
T.M: WGB
community infrastructure consultants
REVISED: 05127120
P.M.: WGB
PRELIMINARY CALCULATIONS
ANTI -SEEP COLLARS
BMP #1
Pipe Diameter in
Length of Covered Pipe ft
Number of Collars
Anti -Seep Collar Sizes
Length: 6.48 ft
Width: 6.48 ft
Note: Anti -seep collars are centered on pipe

Weddington Acres oftwK
PROJECT NO.'60191.00.cL BY: CJH W 1D 1 (,— 1<SQ N
DATE: 091191181 T.M: WGB community infrastructure consultants
REVISED: 05127120 P.M.: WGB PRELIMINARY CALCULATIONS
DRAINAGE AREA BMP #1 - TIME OF CONCENTRATION
POST DEVELOPMENT
Pre -development
Flow Phase One
I Type: Sheet Flow
Length: 100 ft
"N" Value: 0.24 from tables
Slope: 0.0075 ft/ft
Computed 'T' 21.4 Minutes J
Pre -development Type: Shallow Concentrated Flow
Flow Phase Two Surface: u
Length: 152 ft
u=unpaved Slope: 0.030 ft/ft
D=paved Velocity: 2.78 ft/sec
11 Computed 'T'. 0.015 hr, or 11 0.9 Minutes 11
J
Pre -development F Type: Open Channel Flow
Flow Phase Three Length: 1031 ft
Velocity: 5 ft/sec (assumed)
Computed T. 0.057 hr, or 3.4 Minutes
Pre -development
Total Flow
Summary
I Time of Concentration
F Total Tc= 25.7 Minutes
I Lag Time
T LAG = 15.4 Minutes
T LAG =0.6 x T ,
TLAG = 0.26 Hours

Weddington Acres W►W!C
PROJECT NO.: 20160191.00.c�7YH I✓)ATE: o9/1911,12EVISED: 05/27/20 J WATER QUALITY BASIN CALCULATIONS -DRY POND 2
As designed pond areas:
Storage Volumes
Cumulative
Elevation
Area(ac)
Volume(ac-ft)
697
0.110881543
0.00
698
0.13459596
0.12
699
0.159733701
0.27
700
0.186065197
0.44
701
0.21359045
0.64
702
0.242286501
0.87
703
0.272199265
1.13
Forbay Volume (CF)
0
Total Volume (CF)
49035
Forebay % of Pond
0.00 %
Permanent Pond Storage Volume
Elevation
Forebay
Forebay
FB Volume
FB Volume
Pond
Pond
Pond Volume
Pond Volume
(msl)
(so
(ac)
(cu-R)
(ac-ff)
($0
(ac)
(CU-R)
697
0.0000
0.0000
4830
0.1109
��
698
0.0000
0.0000
5863
0.1346
5333
0.0000
699
0.0000
0.0000
6958
0.1597
11729
0.1468
700
10.1861
19246
0.3194
701
0.0000
0.0000
9304
0.2136
27935
0.5189
702
0.0000
0.0000
10554
0.2423
37847
0.7464
703
0.0000
0.0000
11857
0.2722
49035
1.0033
000000000
000000000
000000000
000000000
000000000
000000000
000000000
Interpolation to find elevation at which required storage volume is reached
Storage
Storage
Storage
Elev volume
area (ac.)
area (sf.)
697 0.00
0.11
4830
Elev 0.11
0.13
5739
698 0.12
0.13
5863
Elev= 697.88
Storage elevation = 0.88 feet above permanent pool elevation
Assume 2 day minimum
Determination of Orifice size for 2-5 day drawdown
a= 2A x sq rt(h) 'Falling head equation
Ct(sgrt(29))
a= Area of orifice
t= Time to drawdown
A= Average pond surface area
g= Gravity constant
h= Change in head
C= Orifice constant
Maximum orifice area =
Maximum orifice size =
Selected orifice size =
a sqft
259200 sec
8798 sf (3 day drawdown)
32.2 ft/s^2
0.88 ft
0.6
0.01 sgft
1.56 inches
1.50 inches

Weddington Acres wftwl<
PROJECT NO. 20160191.00.CL I BY: CJH ap p I G KSQ N
DATE: 09/19/18 T.M: WGB community infrastructure consultants
REVISED: 05127120 P.M.: WGB FLOATATION CALCULATIONS - BMP #2
CONSTRAINTS:
Weight of Concrete 150 Ibs/ft^3
Weight of Water 62.4 Ibs/ft^4
Safety Factor (S.F.) 1.1
Height of structure 4 ft
Structure thickness 6 in
Outlet box width (interior) 4 ft
Weight of outlet structurefWs)
Ws = (width + thickness x 4) x thickness x height x weight of concrete =
Weight of water displaced
Ww = ((width + 2 x thickness) A 2) x Weight of water x height = 6240 Ibs
C;,- 12-
Wb = (S.F. x Ww) - Ws = 1526 Ibs
Footing size
Required concrete = Wb / (Weight of concrete -weight of water) = 17 cult
*Assume base is 6" wider than exterior box width and minimum thickness is 8".
Thickness of base = 0.67 ft
Length = 6.00 ft
Width = 6.00 ft
Thickness = 0.70 ft
5400 Ibs

Weddington Acres NhwK
PROJECT NO.: 20160191.00.CL BY: CJH r DICKSON
DATE: 09/19/18 T.M: WGB community Infrastructure consultants
REVISED: 05127120 P.M.: WGB PRELIMINARY CALCULATIONS
ANTI -SEEP COLLARS
BMP #2
Pipe Diameter in
Length of Covered Pipe ft
Number of Collars
Anti -Seep Collar Sizes
Length: 5.40 ft
Width: 5.40 ft
Note: Anti -seep collars are centered on pipe

Weddington Acres oftwK
PROJECT NO. 20160191.00.CL BY: CJH W 1D 1 (—, 1<SC)N
DATE: 09119118 T.M: WGB community infrastructure consultants
REVISED: 05127120 P.M.: WGB PRELIMINARY CALCULATIONS
DRAINAGE AREA BMP #2 - TIME OF CONCENTRATION
POST -DEVELOPMENT
Post -development
Flow Phase One
Type: Sheet Flow
Length: 100 ft
"N" Value: 0.24 from tables
Slope: 0.0675 ft/ft
Computed 'T' 8.9 Minutes
Post -development Type: Shallow Concentrated Flow
Flow Phase Two Surface: u
Length: 28 ft
u=unpaved Slope: 0.071 ft/ft
D=paved Velocity: 4.31 ft/sec
ii Computed 'T'. 0.002 hr, or 0.12 Minutes 11
L
Post -development
Flow Phase Three
I Type: Open Channel Flow
Length: ft
Velocity: 5 ft/sec (assumed)
Computed 7. 0.033 hr, or
2.0 Minutes
Post -development
Total Flow
Summary
Time of Concentration
Total Tc= 11.0 Minutes
Lag Time
T LAG = 6.6 Minutes
T LAc =0.6 x T JITLAG
= 0.11 Hours

Weddington Acres
WK
I7> 14:777-- K4 �
community infrostructure consultants
PROJECT NO.: 20160191.00.CL
BY: CJH
DATE: 09/19/18
T.M.: WGB
REVISED: 05127120
P.M.: WGB
RIPRAP APRON DESIGN (NCDENR METHOD)
s° I
Ou71e1 w - qa - I.„
Ta La ��
i lyger 0.3Dp
qw a
10 ' 50 L-90 WO .
0I6vharV ( I r,7
Design of outlet protection from a round pipe flowing full, minimum tailwater condition Tw<0.5 diameter
FES #
Do (Pipe o)
(ft)
Tw
(ft)
TW<0.5o
Q
(cfs)
V
(ft/s)
d50
(ft)
La
(ft)
Apron width
at pipe (ft)
Apron width
at outlet (ft)
Max Stone
o (ft)
Apron
Thickness(ft)
FES-BMP#1
3
OKAY
2.40
5
0.25
15
9
18
0.38
0.56
FES-BMP#2
2
OKAY
15.70
5
0.25
20
6
22
0.38
0.56
FES-306
3.5
OKAY
17.24
5.49
0.25
18
10.5
22
0.38
0.56

Weddington Acres
WK
I7> I4:777-- K4 �
community infrostructure consultants
PROJECT NO.: 20160191.00.CL
BY: CJH
DATE: 09/19/18
T.M.: WGB
REVISED: 05127120
P.M.: WGB
RIPRAP APRON DESIGN (NCDENR METHOD)
3G6
Qutke�t '4 - af) u . 4 L¢
pipe — -'--- — , i
dlarnetc3r {Do} La 11�
Y. I�'��:-
70
Ji
�-
z0—i
]Q
0
3 5 10
M ID0
Discharge (fob sec)
3
Design of outlet protection from a round pipe flowing full, maximum tailwater condition Tw>_0.5 diameter
FES #
Do(Pipe o)
TW
T,N 0.5o
Q
V
d5u
La
Apron width
Apron width
Max Stone
Apron
(ft)
(ft)
(cfs)
(ft/s)
(ft)
(ft)
at pipe (ft)
at outlet (ft)
0 (ft)
Thickness(ft)
FES-100
2.5
3
OKAY
38.37
3.05
0.25
15
7.5
9
0.38
0.56
FES-114
2.5
1.25
OKAY
28.63
3.96
0.25
15
7.5
9
0.38
0.56
FES-200
1.5
3.5
OKAY
7.49
2.93
0.25
15
4.5
8
0.38
0.56

Weddington Acres
��WI<
. I:> 1 1<143Q Ili
community infrc3structurc consultants
PROJECT NO.: 20160191.00.CL
BY: CJH
DATE: 09/19/18
T.M.: WGB
REVISED: 05/27/20
P.M.: WGB
SLAB TOP & DROP INLET CALCULATIONS
25 Year Intensity (i) = 8.29 in/hr
Runoff Coefficient = 0.6
Time of Concentration= 5 min.
SLAB TYPE CATCH BASIN
Weir
Drainage
Flow to
Inlet Pipe
Outlet Pipe
Weir *
Capacity
Number of
Yard Inlet
Area (acres)
Inlet (cfs)
Size (in)
Size (in)
Length (ft)
(cfs)
Open Sides
eep) based on
MANDARD DROP INLET
Weir Eq.: Depth = [Surface Q/(3.3*P)]^(2/3)
P of Std Drop Inlet Grate = 6.94 ft.
TAL GRATE
(Orifice Eq.: Depth = [Surface Q/(0.6*A*64.4^(1/2))]^2
Open Area of Std Drop Inlet Grate = 3.66 sq.ft.
Surface
Depth Depth
Drainage
Flow to
Inlet Pipe
Outlet Pipe
w/ Weir
w/ Orifice
Required
Drop Inlet
Area (acres)
Inlet (cfs)
Size (in)
Size (in)
Equation (ft)
Equation (ft)
Depth (ft)
* based on CMLDS STD. 20.13 & 20.14

Weddington Acres \//l<
PROJECT NO 20160191.00.CL BY: CJH
DATE: 9/17/2018 T.M.: WGB �Qmm Vy En1rQ51—cl re C0n5.1tQW5
REVISED: 512712020 P.M.: WGB SEDIMENT BASIN CALCULATIONS
SEDIMENT BASIN #1 PHI
DRAINAGE AREAS/READ STORAGE
DESIGN CRITERIA
Total drainage area (TDA) 16.10 ac
Proposed sediment depth ft
Disturbed area(DA) 16.10 ac
Bottom elevation of basin msl
Required sediment stora e(1800xTDA) 28980 cf
Depth of flow over Riser ft
BASIN CONFIGURATION
Bottom elevation
709 msl
Sediment Storage elevation
713 msl
Primary Spillway crest
714.5 msl
Top of Berm
716 msl
ESTIMATED BASIN SIZE (RECTANGULAR)
Length(ft) Width(ft)
Bottom 200 76
Top 221 97
BASIN EFFICIENCY
Sediment storage provided: 72109 OKAY
Sediment storage required: 28980 cf
Surface area/Flow comparison: 21603 OKA Y
PLANNED BASIN SIZE
(REFER TO EROSION CONTROL PLAN)
Elev. Area (SF) Cumulative Volume (CF)
709
14592
0
710
16260
15426
711
17985
32549
712
19766
51424
713
21603
72109
714
23498
115373
715
25449
1 162425
DESIGN FLOW (Q=CIA)
RISER DESIGN
Bare soil coefficient 'C' =
0.60
Riser pipe diameter 54 in
4'x4' Box equivalent to 54" diameter riser
Depth of flow 1.5 ft
Flow through riser. 87 cfs OKAY
Com osite 'C'= 0.60
Area A'= 16.10 ac
10 yr. storm rainfall intensity, T = 4.6 in/hr
Computed flow from site, 'Q' = 44 cfs
SPILLWAY DESIGN
Spillway design: (L=Q/(C`h^1.5));
C= 3.0 h= 1.00
Spillway length @ flow depth 18
OUTLET PIPE DESIGN
Outlet pipe diameter
36 in
Flow through outlet pipe 79 cfs
(Note: Flow determined using outlet control and pipe 80 % full)
OUTLET PIPE IS OKAY
Pipe slope ft/ft
0.018 ft/ft
Pipe length(ft)
111 ft
Outlet pipe invert in
707
Outlet pipe invert out
705
CONCRETE ANCHOR SIZE
SEE PERMENANT POND CONCRETE ANCHOR SIZE
SURFACE AREA/FLOW COMPARISON:
Formula:
A=435'Q
1
4.6 10 year storm
A:
Minimum Surface Area (acres) measured
at the crest of the principal spillway
(design):
44 CFS
A(Required):
19140 sf of surface area at sed stor elev
Q:
Peak inflow rate of 10 year storm in cfs
A(Provided)
21603 OKAY
Cubic Feet per day
Formula: Qd=V/td = (ft^3/day)
NCDENR optimal dewatering time is 3 days
td = desired detwatering time in days = 3 days
Qd: 9660 ft^31dav
Select Skimmer Size: 3 in.
Head on Orifice (Use Chart):
0.25 ft.
Formula:
D:
2.89 in.
Actual Orifice Diameter.,
2.5 in.
OKAY
NCDENR Head on Orifice Chart
Skimmer Size (in.)
Hc:ad on Onficc (fi.)
1.5
0.125
2
0.167
25
0208
3
0.25
4
0.333
5
0.333
6
0.417
�
OS

Weddington Acres \//l<
PROJECT NOD160191.00.CL BY: CJH 01i(-_ K5C7N
DATE: 9/17/2018 T.M.: WGB cOmmunity lnlrQs+ruclura cor,swtonts
REVISED: 512712020 P.M.: WGB SEDIMENT BASIN CALCULATION
SEDIMENT BASIN #2 PH1
DRAINAGE AREAS/READ STORAGE
DESIGN CRITERIA
Total drainage area (TDA) ac
Proposed sediment depth ft
Disturbed area(DA) 4.96 ac
Bottom elevation of basin msl
Required sediment storage(1800xTDA) 8928 cf
Depth of flow over Riser ft
BASIN CONFIGURATION
Bottom elevation
697 ms1
Sediment Storage elevation
700 msl
Primary Spillway crest
701.5 msl
Top of Berm
703 msl
ESTIMATED BASIN SIZE RECTANGULAR
Length(ft) Width(ft)
Bottom 83 54
Top 101 72
BASIN EFFICIENCY
Sediment storage provided: 18589 OKAY
Sediment storage required: 8928 cf
Surface area/Flow comparison: 8133 OKAY
PLANNED BASIN SIZE
(REFER TO EROSION CONTROL PLAN)
Elev. Area SF Cumulative Volume (CF)
697
3325
0
698
5881
4603
699
6979
11033
700
8133
18589
701
9344
27328
702
10611
46072
DESIGN FLOW (Q=CIA)
RISER DESIGN
Bare soil coefficient 'C' =
0.60
Riser pipe diameter 54 in
4'x4' Box equivalent to 54" diameter riser
Depth of flow 1.5 ft
Flow through riser: 87 cfs OKAY
Com osite 'C= 0.60
Area A' = 4.96 ac
10 yr. storm rainfall intensity, 'I' = 5.06 in/hr
Computed flow from site, 'Q' = 15 cfs
SPILLWAY DESIGN
Spillway design: (L=Q/(C*h11.5));
C= 3.0 h= 1.00
Spillway length @ flow depth 10
OUTLET PIPE DESIGN
Outlet pipe diameter
24 in
Flow through outlet pipe 31 cfs
(Note: Flow determined using outlet control and pipe 80 % full)
OUTLET PIPE IS OKAY
Pipe sloe fbft
0.0152 ft/ft
Pipe length(ft)
66 ft
Outlet pipe invert in
696
Outlet pipe invert out
695
CONCRETE ANCHOR SIZE
SEE PERMENANT POND CONCRETE ANCHOR SIZE
SURFACE AREA/FLOW COMPARISON:
Formula:
A=435*Q
1
5.06 10 year storm
A:
Minimum Surface Area (acres) measured
at the crest of the principal spillway
(design):
15 CFS
A(Required):
6525 sf of surface area at sed stor elev
Q:
Peak inflow rate of 10
year storm in cfs
A(Provided)
8133 OKAY
Cubic Feet per day
rrmula: Qd=V/td = (ft^3/day)
;DENR optimal dewatering time is 3 days
= desired detwatering time in days = 3 days
Qd: 2976 ft^31dav
t Skimmer Size:
3 in.
on Orifice (Use Chart):
0.25 ft.
ula: I
D:
1.61 in.
it Orifice Diameter.
2.5 in.
OKAY
NR Head on Orifice Chart
Skimmer Size (in.)
Head on Orifice f ft.)
1.5
0.125
2
a_ 167
25
0208
3
0.25
4
0.333
5
0.333
6
0.417
s
a

TRAPEZOIDAL CHANNEL COMPUTATION SHEET
PROJECT:
Weddington Acres
LOCATION:
Weddington,
NC
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TDD #1.1
10.02
0.60
5.06
601.0
2.00
2.00
10.00
2
0.025
75.84
30.42
1.31
5.00
0.010
0.82
200
Straw with Net
✓
TDD #1.2
1.85
0.60
5.06
630.0
1.50
2.00
8.00
2
0.036
56.05
5.62
0.47
4.02
0.040
1.18
38
Synthetic Mat
✓
TDD #1.3
4.80
0.60
5.06
645.0
1.50
2.00
8.00
2
0.025
80.71
14.57
0.65
6.83
0.040
1.62
38
Synthetic Mat
✓
TDD #1.4
1.85
0.60
5.06
493.0
1.75
2.00
9.00
2
0.033
33.11
5.62
0.74
2.16
0.006
0.28
292
Straw with Net
✓
TDD #2.1
2.08
0.60
5.06
878.0
1.75
2.00
9.00
2
0.033
74.04
6.31
0.52
3.99
0.030
0.97
58
Straw with Net
✓
TDD #2.2
1.75
0.60
5.06
762.0
1.50
2.00
8.00
2
0.033
54.69
5.31
0.47
3.88
0.032
0.93
47
Straw with Net
✓
*Manning's values area based on channel lining and design flow depth as shown in NC DENR Table 8.05e.
**Shear Stress is NA if design velocity is less than 2 fps and temporary seeding is used as a liner. Per NC DENR linings are not required if velocity is less than 2 fps.

Weddington Acres \//l<
PROJECT NOD160191.00.CL BY: CJH 01i(-_ K5C7N
DATE: 9/17/2018 T.M.: WGB cOmmunity lnlrQs+rucwre cor,swtonts
REVISED: 512712020 P.M.: WGB SEDIMENT BASIN CALCULATION
SEDIMENT BASIN #1 PH2
DRAINAGE AREAS/READ STORAGE
DESIGN CRITERIA
Total drainage area (TDA) . ac
Proposed sediment depth ft
Disturbed area(DA) 16.50 ac
Bottom elevation of basin msl
Required sediment storage(1800xTDA) 29700 cf
Depth of flow over Riser ft
BASIN CONFIGURATION
Bottom elevation
709 msl
Sediment Storage elevation
713 msl
Primary Spillway crest
714.5 msl
Top of Berm
716 msl
ESTIMATED BASIN SIZE RECTANGULAR
Length(ft) Width(ft)
Bottom 200 76
Top 221 97
BASIN EFFICIENCY
Sediment storage provided: 72109 OKAY
Sediment storage required: 29700 cf
Surface area/Flow comparison: 21603 OKAY
PLANNED BASIN SIZE
(REFER TO EROSION CONTROL PLAN)
Elev. Area SF Cumulative Volume (CF)
709
14592
0
710
16260
15426
711
17985
32549
712
19766
51424
713
21603
72109
714
23498
115373
715
1 25449
162425
DESIGN FLOW (Q=CIA)
RISER DESIGN
Bare soil coefficient 'C' =
0.60
Riser pipe diameter 54 in
4'x4' Box equivalent to 54" diameter riser
Depth of flow 1.5 ft
Flow through riser: 87 cfs OKAY
Com osite 'C= 0.60
Area A' = 16.50 ac
10 yr. storm rainfall intensity, 'I' = 4.6 in/hr
Computed flow from site, 'Q' = 46 cfs
SPILLWAY DESIGN
Spillway design: (L=Q/(C*h11.5));
C= 3.0 h= 1.00
Spillway length @ flow depth 18
OUTLET PIPE DESIGN
Outlet pipe diameter
36 in
Flow through outlet pipe 79 cfs
(Note: Flow determined using outlet control and pipe 80 % full)
OUTLET PIPE IS OKAY
Pipe sloe fbft
0.018 ft/ft
Pipe length(ft)
111 ft
Outlet pipe invert in
707
Outlet pipe invert out
705
CONCRETE ANCHOR SIZE
SEE PERMENANT POND CONCRETE ANCHOR SIZE
SURFACE AREA/FLOW COMPARISON:
Formula:
A=435*Q
1
4.6 10 year storm
A:
Minimum Surface Area (acres) measured
at the crest of the principal spillway
(design):
46 CFS
A(Required):
20010 sf of surface area at sed stor elev
Q:
Peak inflow rate of 10
year storm in cfs
A(Provided)
21603 OKAY
Cubic Feet per day
rrmula: Qd=V/td = (ft^3/day)
;DENR optimal dewatering time is 3 days
= desired detwatering time in days = 3 days
Qd: 9900 ft^31dav
t Skimmer Size:
3 in.
on Orifice (Use Chart):
0.25 ft.
ula: I
D:
2.93 in.
it Orifice Diameter.
2.5 in.
OKAY
NR Head on Orifice Chart
Skimmer Size (in.)
Head on Orifice f ft.)
1.5
0.125
2
0.167
25
0208
3
0.25
4
0.333
5
0.333
6
0.417
s
a

Weddington Acres \//l<
PROJECT NOD160191.00.CL BY: CJH 01i(-_ K5C7N
DATE: 09/17/18 T.M.: WGB cOmmunity lnlrQs+rucwre cor,swtonts
REVISED: 512712020 P.M.: WGB SEDIMENT BASIN CALCULATION
SEDIMENT BASIN #2 PH2
DRAINAGE AREAS/READ STORAGE
DESIGN CRITERIA
Total drainage area (TDA) ac
Proposed sediment depth ft
Disturbed area(DA) 5.31 ac
Bottom elevation of basin msl
Required sediment storage(1800xTDA) 9558 cf
Depth of flow over Riser ft
BASIN CONFIGURATION
Bottom elevation
697 ms1
Sediment Storage elevation
700 msl
Primary Spillway crest
701.5 msl
Top of Berm
703 msl
ESTIMATED BASIN SIZE RECTANGULAR
Length(ft) Width(ft)
Bottom 83 54
Top 101 72
BASIN EFFICIENCY
Sediment storage provided: 18589 OKAY
Sediment storage required: 9558 cf
Surface area/Flow comparison: 8133 OKAY
PLANNED BASIN SIZE
(REFER TO EROSION CONTROL PLAN)
Elev. Area SF Cumulative Volume (CF)
697
3325
0
698
5881
4603
699
6979
11033
700
8133
18589
701
9344
27328
702
10611
46072
DESIGN FLOW (Q=CIA)
RISER DESIGN
Bare soil coefficient 'C' =
0.60
Riser pipe diameter 54 in
4.5x4.5' Box equivalent to 54" diameter riser
Depth of flow 1.5 ft
Flow through riser: 87 cfs OKAY
Com osite 'C= 0.60
Area A' = 5.31 ac
10 yr. storm rainfall intensity, 'I' = 5.06 in/hr
Computed flow from site, 'Q' = 16 cfs
SPILLWAY DESIGN
Spillway design: (L=Q/(C*h11.5));
C= 3.0 h= 1.00
Spillway length @ flow depth 10
OUTLET PIPE DESIGN
Outlet pipe diameter
24 in
Flow through outlet pipe 31 cfs
(Note: Flow determined using outlet control and pipe 80 % full)
OUTLET PIPE IS OKAY
Pipe sloe fbft
0.0152 ft/ft
Pipe length(ft)
66 ft
Outlet pipe invert in
696
Outlet pipe invert out
695
CONCRETE ANCHOR SIZE
SEE PERMENANT POND CONCRETE ANCHOR SIZE
SURFACE AREA/FLOW COMPARISON:
Formula:
A=435*Q
1
5.06 10 year storm
A:
Minimum Surface Area (acres) measured
at the crest of the principal spillway
(design):
16 CFS
A(Required):
6960 sf of surface area at sed stor elev
Q:
Peak inflow rate of 10
year storm in cfs
A(Provided)
8133 OKAY
Cubic Feet per day
rrmula: Qd=V/td = (ft^3/day)
;DENR optimal dewatering time is 3 days
= desired detwatering time in days = 3 days
Qd: 3186 ft^3/dav
t Skimmer Size:
3 in.
on Orifice (Use Chart):
0.25 ft.
ula: I
D:
1.66 in.
it Orifice Diameter.
2.5 in.
OKAY
NR Head on Orifice Chart
Skimmer Size (in.)
Head on Orifice f ft.)
1.5
0.125
2
a_ 167
25
0208
3
0.25
4
0.333
5
0.333
6
0.417
s
a

TRAPEZOIDAL CHANNEL COMPUTATION SHEET
PROJECT:
Weddington Acres
LOCATION:
Weddington, NC
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C
t
U
d
W
O.
N
V
Q
Ac
Co
Ri
L
d
b
e
n
Qf
Qd
S
T
DID #1
1.55
0.60
5.06
690.0
2.00
1.00
9.00
2
0.033
90.40
4.71
0.53
4.26
0.040
1.33
50
Straw with Net
✓
DID #2
3.84
0.60
5.06
561.0
2.00
1.00
9.00
2
0.025
75.47
11.66
0.89
4.72
0.016
0.89
125
RoIIMax Temporary Bionet
✓
DID#3
1.87
0.60
5.06
677.0
1.67
0.00
10.02
3
0.033
57.79
5.68
0.70
3.87
0.032
1.40
52
Straw with Net
✓
DID #4
1.41
0.60
5.06
215.0
5.00
1.00
51.00
5
0.033
1078.44
4.28
0.55
2.07
0.010
0.34
Not Required
Straw with Net
✓
DID #5
1.19
0.60
5.06
840.0
1.67
0.00
10.02
3
0.033
57.79
3.61
0.59
3.45
0.032
1.18
52
Straw with Net
✓
DID #6
0.67
0.60
5.06
250.0
2.00
1.00
9.00
2
0.036
64.19
2.03
0.42
2.65
0.024
0.63
83
RoIIMax Temporary Bionet
✓
DID#7
1.49
0.60
5.06
303.0
2.00
1.00
9.00
2
0.033
68.55
4.52
0.60
3.44
0.023
0.86
87
Straw with Net
✓
DD #10
1.80
0.60
5.06
830.0
2.00
1.00
9.00
2
0.033
74.27
5.46
0.63
3.83
0.027
1.06
74
Straw with Net
✓
Wanning's values area based on channel lining and design flow depth as shown in NC DENR Table 8.05e.
-Shear Stress is NA if design velocity is less than 2 fps and temporary seeding is used as a liner. Per NC DENR linings are not required if velocity is less than 2 fps.

Hydraflow Storm Sewers Extension for Autodesk® AutoCAD® Civil 3D® Plan
Outfall
2
20 19 Outfall
18
11
Outfall
Project File: BMP #1.stm
16
11 1
15
Number of lines: 20 1 Date: 5/28/2020
Storm Sewers v2018.30

Storm Sewer Tabulation
Page 1
Station
Len
Drng Area
Rnoff
Area x C
Tc
Rain
Total
Cap
Vel
Pipe
Invert Elev
HGL Elev
Grnd / Rim Elev
Line ID
coeff
(1)
flow
full
Line
To
Incr
Total
Incr
Total
Inlet
Syst
Size
Slope
Dn
Up
Dn
Up
Dn
Up
Line
(ft)
(ac)
(ac)
(C)
(min)
(min)
(in/hr)
(cfs)
(cfs)
(ft/s)
(in)
M
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
1
End
47.000
0.29
0.43
0.60
0.17
0.26
5.0
6.9
6.5
1.68
4.61
3.14
15
0.51
738.73
738.97
739.35
739.49
740.25
741.91
Pipe - (127)
2
1
56.000
0.14
0.14
0.60
0.08
0.08
5.0
5.0
7.0
0.59
4.57
1.48
15
0.50
738.97
739.25
739.58
739.62
741.91
742.19
Pipe - (131)
3
End
15.843
0.00
7.89
0.60
0.00
4.73
5.0
11.4
5.6
26.44
47.14
5.38
36
0.50
711.58
711.66
714.10
713.32
715.00
718.55
Pipe - (109)
4
3
137.744
1.05
7.89
0.60
0.63
4.73
5.0
10.8
5.7
26.95
171.7
12.17
36
6.63
712.55
721.68
713.35
723.36
718.55
731.05
Pipe - (101) (1) (1)
5
4
102.651
1.76
6.84
0.60
1.06
4.10
5.0
10.5
5.8
23.63
28.91
6.57
30
0.50
722.18
722.69
723.90
724.41
731.05
732.53
Pipe - (101) (1)
6
5
208.418
0.61
5.08
0.60
0.37
3.05
5.0
9.9
5.9
17.90
15.98
5.70
24
0.50
723.19
724.23
725.19
726.50
732.53
735.55
Pipe - (101)
7
6
159.390
0.42
4.47
0.60
0.25
2.68
5.0
9.4
6.0
16.02
16.02
5.10
24
0.50
724.43
725.23
726.75
727.55
735.55
737.86
Pipe - (92)
8
7
164.021
0.03
4.05
0.60
0.02
2.43
5.0
8.8
6.1
14.79
15.99
4.71
24
0.50
725.73
726.55
728.05
728.75
737.86
745.60
Pipe - (93)
9
8
158.360
0.13
2.20
0.60
0.08
1.32
5.0
7.9
6.3
8.31
15.98
2.71
24
0.50
726.85
727.64
729.27
729.46
745.60
742.65
Pipe - (94)
10
9
41.701
0.21
1.48
0.60
0.13
0.89
5.0
5.2
7.0
6.20
7.45
4.71
18
0.50
734.87
735.08
735.92
736.13
742.65
742.99
Pipe - (95)
11
10
29.336
1.27
1.27
0.60
0.76
0.76
5.0
5.0
7.0
5.36
25.43
4.54
18
5.86
735.28
737.00
736.30
737.89
742.99
738.79
Pipe - (121)
12
8
45.777
0.06
1.82
0.60
0.04
1.09
5.0
5.3
7.0
7.60
7.44
4.80
18
0.50
729.35
729.58
730.61
730.84
745.60
746.54
Pipe - (133)
13
12
94.266
1.76
1.76
0.60
1.06
1.06
5.0
5.0
7.0
7.42
11.99
8.42
15
3.45
733.25
736.50
733.96
737.58
746.54
738.02
Pipe - (132)
14
9
106.765
0.09
0.59
0.60
0.05
0.35
5.0
7.0
6.5
2.30
4.59
1.88
15
0.51
727.79
728.33
729.72
729.85
742.65
740.57
Pipe - (98)
15
14
117.878
0.09
0.50
0.60
0.05
0.30
5.0
5.8
6.8
2.04
4.55
1.91
15
0.50
728.53
729.11
729.90
730.01
740.57
735.70
Pipe - (99)
16
15
67.072
0.41
0.41
0.60
0.25
0.25
5.0
5.0
7.0
1.73
4.60
2.80
15
0.51
729.31
729.65
730.08
730.19
735.70
732.84
Pipe - (100)
17
End
48.504
0.00
2.21
0.60
0.00
1.33
5.0
8.8
6.1
8.07
29.00
1.65
30
0.50
710.13
710.37
714.10
714.12
713.01
716.16
Pipe - (80)
18
17
307.248
0.16
2.21
0.60
0.10
1.33
5.0
6.1
6.7
8.94
29.03
1.86
30
0.50
710.45
711.99
714.13
714.26
716.16
723.08
Pipe - (81)
19
18
45.343
0.50
2.05
0.60
0.30
1.23
5.0
5.6
6.9
8.43
28.89
3.31
30
0.50
712.03
712.25
714.31
713.22
723.08
722.36
Pipe - (82)
20
19
49.425
1.55
1.55
0.60
0.93
0.93
5.0
5.0
7.0
6.54
29.17
4.10
30
0.51
712.25
712.50
713.22
713.35
722.36
717.48
Pipe - (82) (1)
Project File: BMP #1.stm
Number of lines: 20
Run Date: 5/28/2020
NOTES:Intensity = 84.35 / (Inlet time + 15.10) ^ 0.83; Return period =Yrs. 10 c = cir e = ellip b = box
Storm Sewers v2018.30

Hydraflow Storm Sewers Extension for Autodesk® AutoCAD® Civil 3D® Plan
Outfall
2
20 19 Outfall
18
11
Outfall
Project File: BMP #1.stm
16
11 1
15
Number of lines: 20 1 Date: 5/28/2020
Storm Sewers v2018.30

Storm Sewer Tabulation
Page 1
Station
Len
Drng Area
Rnoff
Area x C
Tc
Rain
Total
Cap
Vel
Pipe
Invert Elev
HGL Elev
Grnd / Rim Elev
Line ID
coeff
(1)
flow
full
Line
To
Incr
Total
Incr
Total
Inlet
Syst
Size
Slope
Dn
Up
Dn
Up
Dn
Up
Line
(ft)
(ac)
(ac)
(C)
(min)
(min)
(in/hr)
(cfs)
(cfs)
(ft/s)
(in)
M
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
1
End
47.000
0.29
0.43
0.60
0.17
0.26
5.0
6.7
7.7
1.98
4.61
3.48
15
0.51
738.73
738.97
739.35
739.53
740.25
741.91
Pipe - (127)
2
1
56.000
0.14
0.14
0.60
0.08
0.08
5.0
5.0
8.2
0.69
4.57
1.48
15
0.50
738.97
739.25
739.64
739.67
741.91
742.19
Pipe - (131)
3
End
15.843
0.00
7.89
0.60
0.00
4.73
5.0
10.5
6.7
31.75
47.14
6.03
36
0.50
711.58
711.66
714.10
713.49
715.00
718.55
Pipe - (109)
4
3
137.744
1.05
7.89
0.60
0.63
4.73
5.0
10.0
6.8
32.30
171.7
12.13
36
6.63
712.55
721.68
713.49
723.52
718.55
731.05
Pipe - (101) (1) (1)
5
4
102.651
1.76
6.84
0.60
1.06
4.10
5.0
9.7
6.9
28.28
28.91
6.71
30
0.50
722.18
722.69
724.18
724.69
731.05
732.53
Pipe - (101) (1)
6
5
208.418
0.61
5.08
0.60
0.37
3.05
5.0
9.2
7.0
21.37
15.98
6.80
24
0.50
723.19
724.23
725.19
727.05
732.53
735.55
Pipe - (101)
7
6
159.390
0.42
4.47
0.60
0.25
2.68
5.0
8.7
7.1
19.09
16.02
6.08
24
0.50
724.43
725.23
727.41
728.55
735.55
737.86
Pipe - (92)
8
7
164.021
0.03
4.05
0.60
0.02
2.43
5.0
8.3
7.2
17.59
15.99
5.60
24
0.50
725.73
726.55
729.26
730.25
737.86
745.60
Pipe - (93)
9
8
158.360
0.13
2.20
0.60
0.08
1.32
5.0
7.5
7.5
9.84
15.98
3.13
24
0.50
726.85
727.64
730.98
731.28
745.60
742.65
Pipe - (94)
10
9
41.701
0.21
1.48
0.60
0.13
0.89
5.0
5.1
8.2
7.25
7.45
4.80
18
0.50
734.87
735.08
736.06
736.27
742.65
742.99
Pipe - (95)
11
10
29.336
1.27
1.27
0.60
0.76
0.76
5.0
5.0
8.2
6.25
25.43
4.71
18
5.86
735.28
737.00
736.45
737.97
742.99
738.79
Pipe - (121)
12
8
45.777
0.06
1.82
0.60
0.04
1.09
5.0
5.2
8.1
8.88
7.44
5.03
18
0.50
729.35
729.58
730.98
731.31
745.60
746.54
Pipe - (133)
13
12
94.266
1.76
1.76
0.60
1.06
1.06
5.0
5.0
8.2
8.67
11.99
9.00
15
3.45
733.25
736.50
734.04
737.64
746.54
738.02
Pipe - (132)
14
9
106.765
0.09
0.59
0.60
0.05
0.35
5.0
6.7
7.7
2.72
4.59
2.21
15
0.51
727.79
728.33
731.61
731.80
742.65
740.57
Pipe - (98)
15
14
117.878
0.09
0.50
0.60
0.05
0.30
5.0
5.7
8.0
2.39
4.55
1.95
15
0.50
728.53
729.11
731.87
732.03
740.57
735.70
Pipe - (99)
16
15
67.072
0.41
0.41
0.60
0.25
0.25
5.0
5.0
8.2
2.02
4.60
1.65
15
0.51
729.31
729.65
732.09
732.16
735.70
732.84
Pipe - (100)
17
End
48.504
0.00
2.21
0.60
0.00
1.33
5.0
8.3
7.2
9.60
29.00
1.96
30
0.50
710.13
710.37
714.10
714.13
713.01
716.16
Pipe - (80)
18
17
307.248
0.16
2.21
0.60
0.10
1.33
5.0
5.9
7.9
10.49
29.03
2.17
30
0.50
710.45
711.99
714.14
714.32
716.16
723.08
Pipe - (81)
19
18
45.343
0.50
2.05
0.60
0.30
1.23
5.0
5.5
8.0
9.88
28.89
3.56
30
0.50
712.03
712.25
714.38
713.30
723.08
722.36
Pipe - (82)
20
19
49.425
1.55
1.55
0.60
0.93
0.93
5.0
5.0
8.2
7.63
29.17
4.29
30
0.51
712.25
712.50
713.30
713.42
722.36
717.48
Pipe - (82) (1)
Project File: BMP #1.stm
Number of lines: 20
Run Date: 5/28/2020
NOTES:Intensity = 93.88 / (Inlet time + 14.70) ^ 0.82; Return period =Yrs. 25 c = cir e = ellip b = box
Storm Sewers v2018.30

Hydraflow Storm Sewers Extension for Autodesk® AutoCAD® Civil 3D® Plan
2
1
Outfal I
6
5
4
3
0 Outfall
Project File: New.stm Number of lines: 6 Date: 11/27/2018
Storm Sewers v11.00

Storm Sewer Tabulation
Page 1
Station
Len
Drng Area
Rnoff
Area x C
Tc
Rain
Total
Cap
Vel
Pipe
Invert Elev
HGL Elev
Grnd / Rim Elev
Line ID
coeff
(I)
flow
full
Line
To
Incr
Total
Inn cr
Total
Inlet
Syst
Size
Slope
Dn
Up
Dn
Up
Dn
Up
Line
(ft)
(ac)
(ac)
(C)
(min)
(min)
(in/hr)
(cfs)
(cfs)
(ft/s)
(in)
(%)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
1
End
118.765
0.13
0.80
0.60
0.08
0.48
5.0
5.3
7.1
3.43
8.30
5.18
15
1.65
708.38
710.34
708.98
711.09
709.90
715.47
Pipe - (90) (1)
2
1
49.570
0.67
0.67
0.60
0.40
0.40
5.0
5.0
7.2
2.91
10.05
4.02
15
2.42
710.34
711.54
711.09
712.23
715.47
715.47
Pipe - (90)
3
End
41.451
0.00
0.84
0.60
0.00
0.50
5.0
7.2
6.6
3.35
7.48
2.15
18
0.51
699.70
699.91
701.04
701.06
701.49
703.98
Pipe - (83)
4
3
108.192
0.00
0.84
0.60
0.00
0.50
5.0
6.3
6.9
3.46
23.24
4.10
18
4.90
700.38
705.68
701.12
706.39
703.98
710.38
Pipe - (84)
5
4
111.627
0.42
0.84
0.60
0.25
0.50
5.0
5.4
7.1
3.58
14.40
5.51
18
1.88
705.88
707.98
706.39
708.70
710.38
712.95
Pipe - (85)
6
5
27.130
0.42
0.42
0.60
0.25
0.25
5.0
5.0
7.2
1.82
7.27
3.42
18
0.48
708.25
708.38
708.76
708.89
712.95
712.64
Pipe - (86)
Project File: New.stm
Number of lines: 6
Run Date: 11/27/2018
NOTES:Intensity = 88.24 / (Inlet time + 15.50) ^ 0.83; Return period =Yrs. 10 ; c = cir e = ellip b = box
Storm Sewers v11.00

Hydraflow Storm Sewers Extension for Autodesk® AutoCAD® Civil 3D® Plan
2
1
Outfal I
6
5
4
3
0 Outfall
Project File: New.stm Number of lines: 6 Date: 11/27/2018
Storm Sewers v11.00

Storm Sewer Tabulation
Page 1
Station
Len
Drng Area
Rnoff
Area x C
Tc
Rain
Total
Cap
Vel
Pipe
Invert Elev
HGL Elev
Grnd / Rim Elev
Line ID
coeff
(I)
flow
full
Line
To
Incr
Total
Inn cr
Total
Inlet
Syst
Size
Slope
Dn
Up
Dn
Up
Dn
Up
Line
(ft)
(ac)
(ac)
(C)
(min)
(min)
(in/hr)
(cfs)
(cfs)
(ft/s)
(in)
(%)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
1
End
118.765
0.13
0.80
0.60
0.08
0.48
5.0
5.3
8.2
3.91
8.30
5.69
15
1.65
708.38
710.34
708.98
711.14
709.90
715.47
Pipe - (90) (1)
2
1
49.570
0.67
0.67
0.60
0.40
0.40
5.0
5.0
8.2
3.32
10.05
4.22
15
2.42
710.34
711.54
711.14
712.27
715.47
715.47
Pipe - (90)
3
End
41.451
0.00
0.84
0.60
0.00
0.50
5.0
7.0
7.7
3.87
7.48
2.48
18
0.51
699.70
699.91
701.04
701.07
701.49
703.98
Pipe - (83)
4
3
108.192
0.00
0.84
0.60
0.00
0.50
5.0
6.2
7.9
3.98
23.24
4.40
18
4.90
700.38
705.68
701.14
706.44
703.98
710.38
Pipe - (84)
5
4
111.627
0.42
0.84
0.60
0.25
0.50
5.0
5.4
8.1
4.10
14.40
5.61
18
1.88
705.88
707.98
706.44
708.75
710.38
712.95
Pipe - (85)
6
5
27.130
0.42
0.42
0.60
0.25
0.25
5.0
5.0
8.2
2.08
7.27
3.56
18
0.48
708.25
708.38
708.80
708.93
712.95
712.64
Pipe - (86)
Project File: New.stm
Number of lines: 6
Run Date: 11/27/2018
NOTES:Intensity = 102.61 / (Inlet time + 16.50) " 0.82; Return period =Yrs. 25 ; c = cir e = ellip b = box
Storm Sewers v11.00

Project Description
Friction Method
Solve For
Input Data
Roughness Coefficient
Channel Slope
Normal Depth
Diameter
Discharge
Results
Discharge
Normal Depth
Flow Area
Wetted Perimeter
Hydraulic Radius
Top Width
Critical Depth
Percent Full
Critical Slope
Velocity
Velocity Head
Specific Energy
Froude Number
Maximum Discharge
Discharge Full
Slope Full
Flow Type
GUF'Input.. Data
Worksheet for Circular Pipe - 1
Manning Formula
Full Flow Capacity
SubCritical
0.024
0.02000 ft/ft
1.50 ft
1.50 ft
8.05 ft3/s
8.05 ft3/s
1.50 ft
1.77 ftZ
4.71 ft
0.38 ft
0.00 ft
1.10 ft
100.0 %
0.02543 ft/ft
4.55 ft/s
0.32 ft
1.82 ft
0,00
8.66 ft3/s
8.05 ft3/s
0.02000 ft/ft
Downstream Depth 0.00 ft
Length 0.00 ft
Number Of Steps 0
GVF Output Data
Upstream Depth 0.00 ft
Profile Description
Profile Headloss 0.00 ft
Average End Depth Over Rise 0.00
Bentley Systems, Inc, Haestad Methods SoI�Bi�ttl�i6iie�uvMaster V8i (SELECTseries 1) [08.11.01.03j
9/17/2018 1:49:08 PM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA [phone] Page 1 of 2

Worksheet for Circular Pipe - 1
GVF Output Data
Normal Depth Over Rise 100.00
Downstream Velocity Infinity ft/s
Upstream Velocity Infinity ft/s
Normal Depth 1.50 ft
Critical Depth 1.10 ft
Channel Slope 0,02000 ft/ft
Critical Slope 0.02543 ft/ft
Bentley Systems, Inc. Haestad Methods SoliBi�ntl�Master V8i (SELECTseries 1) [08.11.01.03]
9/17/2018 1:49:08 PM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1wMJ55-1666 Page 2 of 2

(1S (iS (i�
PreT#2 pre #3
Pre #1
PRE-POgl2 PRE-POI#3 PRE-POIp6
4L
Pre -Development POI#2 Pre -Development POI#3 Pre -Development POW
Pre -Development POI
POND#1 pOND#2 POI#2 POI#3
6S 5S POI#a
Post-Dev lopment post-Develo ment Pond Post -Development
By -Pass #2 Pon #1 POI#2 Post-Development
ment post -Development
By -Pass # POW
Z4\
Detentio Pond #1 Det tion Pond #2
iOI#1
Post -Development
POI#1
Subcat Reach on Link n
Diagram for Weddington Acres HydroCAD Revised LayouPrepared by Microsoft, Printed 5/27/2020D® 10.00-15 s/n 08484 © 2015 HydroCAD Software Solutions LLC

Weddington Acres HydroCAD Revised Layout
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 2
Area Listing (all nodes)
Area CN Description
(acres) (subcatchment-numbers)
2.290
61
>75% Grass cover, Good, HSG B (P0I#4, POND#1)
5.439
56
Brush, Fair, HSG B (3S)
2.700
73
Brush, Good, HSG D (5S, 6S)
1.704
98
Paved parking, HSG B (P0I#3, P0I#4, POND#1, POND#2, PRE-P0I#4)
0.137
98
Paved roads w/curbs & sewers, HSG B (PRE-POI#3)
2.904
98
Roofs, HSG A (POND#1, POND#2)
0.272
98
Water Surface, HSG A (POND#2)
0.504
98
Water Surface, HSG B (POND#1)
28.426
55
Woods, Good, HSG B (1 S, 2S, 3S)
19.674
65
Woods/grass comb., Fair, HSG B (P0I#2, P0I#3, PRE-P0I#2, PRE-P0I#3,
PRE-POI#4)
34.641
58
Woods/grass comb., Good, HSG B (5S, 6S, POND#1, POND#2)
3.220
79
Woods/grass comb., Good, HSG D (1S, 2S, POND#2)
101.911
62
TOTAL AREA

Weddington Acres HydroCAD Revised Layout
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 3
Soil Listing (all nodes)
Area Soil Subcatchment
(acres) Group Numbers
3.176 HSG A POND#1, POND#2
92.815 HSG B 1S, 2S, 3S, 5S, 6S, POI#2, POI#3, POI#4, POND#1, POND#2, PRE-POI#2,
PRE-POI#3, PRE-POI#4
0.000 HSG C
5.920 HSG D 1S, 2S, 5S, 6S, POND#2
0.000 Other
101.911 TOTAL AREA

Weddington Acres HydroCAD Revised Layout
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 4
Ground Covers (all nodes)
HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment
(acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers
0.000
2.290
0.000
0.000
0.000
2.290
>75% Grass cover, Good
POI
#4,
PON
D#1
0.000
5.439
0.000
0.000
0.000
5.439
Brush, Fair
3S
0.000
0.000
0.000
2.700
0.000
2.700
Brush, Good
5S,
6S
0.000
1.704
0.000
0.000
0.000
1.704
Paved parking
POI
#3,
POI
#4,
PON
D#1,
PON
D#2,
PRE
-POI
#4
0.000
0.137
0.000
0.000
0.000
0.137
Paved roads w/curbs & sewers
PRE
-POI
#3
2.904
0.000
0.000
0.000
0.000
2.904
Roofs
PON
D#1,
PON
D#2
0.272
0.504
0.000
0.000
0.000
0.776
Water Surface
PON
D#1,
PON
D#2
0.000
28.426
0.000
0.000
0.000
28.426
Woods, Good
is,
2S,
3S
0.000
19.674
0.000
0.000
0.000
19.674
Woods/grass comb., Fair
POI
#2,
POI
#3,
PRE
-POI
#2,
PRE
-POI
#3,

Weddington Acres HydroCAD Revised Layout
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 5
Ground Covers (all nodes) (continued)
HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment
(acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers
0.000 34.641 0.000 3.220 0.000 37.861 Woods/grass comb., Good 1S,
2S,
5S,
6S,
PON
D#1,
PON
D#2
3.176 92.815 0.000 5.920 0.000 101.911 TOTAL AREA

Weddington Acres HydroCAD Revised Layout
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 6
Pipe Listing (all nodes)
Line# Node In -Invert Out -Invert Length Slope n Diam/Width Height Inside -Fill
Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches)
1 DET POND-1 707.00 705.00 111.0 0.0180 0.013 36.0 0.0 0.0
2 DET POND-2 696.00 695.00 66.0 0.0152 0.013 24.0 0.0 0.0

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Paae 7
Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment IS: Pre #1 Runoff Area=9.570 ac 0.00% Impervious Runoff Depth=0.25"
Tc=18.5 min CN=58 Runoff=1.16 cfs 0.198 of
Subcatchment2S: Pre #2 Runoff Area=10.386 ac 0.00% Impervious Runoff Depth=0.31"
Tc=23.8 min CN=60 Runoff=1.63 cfs 0.264 of
Subcatchment3S: Pre #3 Runoff Area=16.909 ac 0.00% Impervious Runoff Depth=0.17"
Tc=23.6 min CN=55 Runoff=0.77 cfs 0.245 of
Subcatchment5S: By-Pass#2 Runoff Area=14.199 ac 0.00% Impervious Runoff Depth=0.31"
Tc=23.1 min CN=60 Runoff=2.27 cfs 0.361 of
Subcatchment6S: By-Pass#1 Runoff Area=7.040 ac 0.00% Impervious Runoff Depth=0.28"
Tc=18.5 min CN=59 Runoff=1.06 cfs 0.162 of
SubcatchmentPOI#2: Post -Development Runoff Area=1.540 ac 0.00% Impervious Runoff Depth=0.47"
Tc=17.6 min CN=65 Runoff=0.63 cfs 0.060 of
SubcatchmentPOI#3: Post -Development Runoff Area=4.635 ac 6.84% Impervious Runoff Depth=0.55"
Tc=14.9 min CN=67 Runoff=2.66 cfs 0.211 of
Subcatchment POI#4: Post -Development Runoff Area=1.796 ac 18.71 % Impervious Runoff Depth=0.59"
Tc=25.5 min CN=68 Runoff=0.80 cfs 0.088 of
SubcatchmentPOND#1: Runoff Area=16.500 ac 18.59% Impervious Runoff Depth=0.51"
Tc=25.7 min CN=66 Runoff=5.91 cfs 0.697 of
Subcatchment POND#2: Post -Development Runoff Area=5.248 ac 29.12% Impervious Runoff Depth=0.71"
Tc=11.0 min CN=71 Runoff=5.09 cfs 0.313 of
Subcatchment PRE-POI#2: Pre -Development Runoff Area=4.456 ac 0.00% Impervious Runoff Depth=0.47"
Tc=18.4 min CN=65 Runoff=1.78 cfs 0.175 of
Subcatchment PRE-POI#3: Pre -Development Runoff Area=7.087 ac 1.93% Impervious Runoff Depth=0.51"
Tc=20.0 min CN=66 Runoff=3.03 cfs 0.300 of
Subcatchment PRE-POI#4: Pre -Development Runoff Area=2.545 ac 5.30% Impervious Runoff Depth=0.55"
Tc=15.9 min CN=67 Runoff=1.41 cfs 0.116 of
Pond DIET POND-1: Detention Pond #1 Peak EIev=711.40' Storage=26,161 cf Inflow=5.91 cfs 0.697 of
Primary=0.22 cfs 0.394 of Secondary=0.00 cfs 0.000 of Outflow=0.22 cfs 0.394 of
Pond DIET POND-2: Detention Pond #2 Peak EIev=698.84' Storage=9,929 cf Inflow=5.09 cfs 0.313 of
Primary=0.10 cfs 0.296 of Secondary=0.00 cfs 0.000 of Outflow=0.10 cfs 0.296 of
Link 4L: Pre-DevelopmentPOI Inflow=3.40 cfs 0.708 of
Primary=3.40 cfs 0.708 of

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 8
Link POI#1: Post-DevelopmentPO1#1
Inflow=3.36 cfs 1.213 of
Primary=3.36 cfs 1.213 of
Total Runoff Area = 101.911 ac Runoff Volume = 3.189 of Average Runoff Depth = 0.38"
94.58% Pervious = 96.390 ac 5.42% Impervious = 5.521 ac

Weddington Acres HydroCAD Revised Layout Type 1124-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 9
Summary for Subcatchment 1S: Pre #1
Runoff = 1.16 cfs @ 12.20 hrs, Volume= 0.198 af, Depth= 0.25"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 1 Year Rainfall=2.92"
Area (ac)
CN
Description
8.570
55
Woods, Good, HSG B
1.000
79
Woods/grass comb., Good, HSG D
9.570
58
Weighted Average
9.570
100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.5 Direct Entry,
Subcatchment 1 S: Pre #1
Hydrograph
IIII lilli III
1.16 cfs
T�J�� III 24-hrs
I--f I + - -H H H M `i�zir fRIA4� 11=2.92'�
1
III I I I H I IRluhbff JAtd&9.570 Ad
III I I I I I I I I I I I I I F��r�o�fflV�oll�r���o�1�9$ ��
II I �unp7j
Z=18.5
pth=Q'9
LL min
III Illllllllllllllllllllil�����
III 1IH I 11111111111111111111
III 1IH II111111111IM
I�� I 111�111�����111�11
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
❑ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 10
Hydrograph for Subcatchment 1S: Pre #1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.03
0.00
0.00
2.00
0.06
0.00
0.00
3.00
0.10
0.00
0.00
4.00
0.14
0.00
0.00
5.00
0.18
0.00
0.00
6.00
0.23
0.00
0.00
7.00
0.29
0.00
0.00
8.00
0.35
0.00
0.00
9.00
0.43
0.00
0.00
10.00
0.53
0.00
0.00
11.00
0.69
0.00
0.00
12.00
1.94
0.03
0.19
13.00
2.25
0.08
0.39
14.00
2.39
0.11
0.25
15.00
2.49
0.13
0.21
16.00
2.57
0.15
0.17
17.00
2.63
0.17
0.15
18.00
2.69
0.18
0.14
19.00
2.74
0.20
0.13
20.00
2.78
0.21
0.11
21.00
2.82
0.22
0.10
22.00
2.85
0.23
0.10
23.00
2.89
0.24
0.10
24.00
2.92
0.25
0.10
25.00
2.92
0.25
0.00
26.00
2.92
0.25
0.00
27.00
2.92
0.25
0.00
28.00
2.92
0.25
0.00
29.00
2.92
0.25
0.00
30.00
2.92
0.25
0.00
31.00
2.92
0.25
0.00
32.00
2.92
0.25
0.00
33.00
2.92
0.25
0.00
34.00
2.92
0.25
0.00
35.00
2.92
0.25
0.00
36.00
2.92
0.25
0.00
37.00
2.92
0.25
0.00
38.00
2.92
0.25
0.00
39.00
2.92
0.25
0.00
40.00
2.92
0.25
0.00
41.00
2.92
0.25
0.00
42.00
2.92
0.25
0.00
43.00
2.92
0.25
0.00
44.00
2.92
0.25
0.00
45.00
2.92
0.25
0.00
46.00
2.92
0.25
0.00
47.00
2.92
0.25
0.00
48.00
2.92
0.25
0.00
49.00
2.92
0.25
0.00
50.00
2.92
0.25
0.00
51.00
2.92
0.25
0.00
52.00
2.92
0.25
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.92
0.25
0.00
54.00
2.92
0.25
0.00
55.00
2.92
0.25
0.00
56.00
2.92
0.25
0.00
57.00
2.92
0.25
0.00
58.00
2.92
0.25
0.00
59.00
2.92
0.25
0.00
60.00
2.92
0.25
0.00
61.00
2.92
0.25
0.00
62.00
2.92
0.25
0.00
63.00
2.92
0.25
0.00
64.00
2.92
0.25
0.00
65.00
2.92
0.25
0.00
66.00
2.92
0.25
0.00
67.00
2.92
0.25
0.00
68.00
2.92
0.25
0.00
69.00
2.92
0.25
0.00
70.00
2.92
0.25
0.00
71.00
2.92
0.25
0.00
72.00
2.92
0.25
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 11
Summary for Subcatchment 2S: Pre #2
Runoff = 1.63 cfs @ 12.26 hrs, Volume= 0.264 af, Depth= 0.31"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 1 Year Rainfall=2.92"
Area (ac) CN Description
8.386 55 Woods, Good, HSG B
2.000 79 Woods/grass comb., Good, HSG D
10.386 60 Weighted Average
10.386 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
23.8 Direct Entry,
Subcatchment 2S: Pre #2
Hydrograph
IIIIIII����II� II�IIIII IIIII I
1.63 cfs Typ� III 24-hrs
III III 1 Year Rainfell1=2.92'�
Runoff (Area=110.386 ad
I� �I �RuftVolum�:0�2G4�a
R npff,Pepth=Q.31'j
III III III Tc=23.8 min
LL
III IIIIIIIIIIIIIIIIIIIIIIIIII
III I Illlllllllllll II
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 66 68 60 62 64 66 68 70 72
Time (hours)
❑ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 12
Hydrograph for Subcatchment 2S: Pre #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.03
0.00
0.00
2.00
0.06
0.00
0.00
3.00
0.10
0.00
0.00
4.00
0.14
0.00
0.00
5.00
0.18
0.00
0.00
6.00
0.23
0.00
0.00
7.00
0.29
0.00
0.00
8.00
0.35
0.00
0.00
9.00
0.43
0.00
0.00
10.00
0.53
0.00
0.00
11.00
0.69
0.00
0.00
12.00
1.94
0.05
0.20
13.00
2.25
0.11
0.55
14.00
2.39
0.15
0.34
15.00
2.49
0.17
0.27
16.00
2.57
0.19
0.22
17.00
2.63
0.21
0.19
18.00
2.69
0.23
0.18
19.00
2.74
0.24
0.16
20.00
2.78
0.26
0.14
21.00
2.82
0.27
0.13
22.00
2.85
0.28
0.12
23.00
2.89
0.29
0.12
24.00
2.92
0.31
0.12
25.00
2.92
0.31
0.00
26.00
2.92
0.31
0.00
27.00
2.92
0.31
0.00
28.00
2.92
0.31
0.00
29.00
2.92
0.31
0.00
30.00
2.92
0.31
0.00
31.00
2.92
0.31
0.00
32.00
2.92
0.31
0.00
33.00
2.92
0.31
0.00
34.00
2.92
0.31
0.00
35.00
2.92
0.31
0.00
36.00
2.92
0.31
0.00
37.00
2.92
0.31
0.00
38.00
2.92
0.31
0.00
39.00
2.92
0.31
0.00
40.00
2.92
0.31
0.00
41.00
2.92
0.31
0.00
42.00
2.92
0.31
0.00
43.00
2.92
0.31
0.00
44.00
2.92
0.31
0.00
45.00
2.92
0.31
0.00
46.00
2.92
0.31
0.00
47.00
2.92
0.31
0.00
48.00
2.92
0.31
0.00
49.00
2.92
0.31
0.00
50.00
2.92
0.31
0.00
51.00
2.92
0.31
0.00
52.00
2.92
0.31
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.92
0.31
0.00
54.00
2.92
0.31
0.00
55.00
2.92
0.31
0.00
56.00
2.92
0.31
0.00
57.00
2.92
0.31
0.00
58.00
2.92
0.31
0.00
59.00
2.92
0.31
0.00
60.00
2.92
0.31
0.00
61.00
2.92
0.31
0.00
62.00
2.92
0.31
0.00
63.00
2.92
0.31
0.00
64.00
2.92
0.31
0.00
65.00
2.92
0.31
0.00
66.00
2.92
0.31
0.00
67.00
2.92
0.31
0.00
68.00
2.92
0.31
0.00
69.00
2.92
0.31
0.00
70.00
2.92
0.31
0.00
71.00
2.92
0.31
0.00
72.00
2.92
0.31
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 13
Summary for Subcatchment 3S: Pre #3
Runoff = 0.77 cfs @ 12.35 hrs, Volume= 0.245 af, Depth= 0.17"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 1 Year Rainfall=2.92"
Area (ac) CN Description
11.470 55 Woods, Good, HSG B
5.439 56 Brush, Fair, HSG B
16.909 55 Weighted Average
16.909 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
23.6 Direct Entry,
Subcatchment 3S: Pre #3
Hydrograph
❑ Runoff
o.s
0.77 cfs
4-
4-1
4-1
H
H
1-4
14 14
0.75
0.7
�1
�_I
u
I
I 4�*"�r_JZ6a nt %II��J�
0.65
0.6
I I I I '
—
I I
—
I I
—
I I
—
— I
I I
—
I IRuhbfP Alyda1=l6.909 Ad
— — — — — — — —
0.55
-
-
-
-
-i"I� i�ZI - 1
w 0.5
0.45
0 0.4
HI -
I H
H
—
-H
H
HI
1u �1�1 P�F
"0
T-C=:7.LI r1
I-4
I4
-kI�I
�I
N
I-4I4I4
4-I�I�-6kL
.3
0.3
0.25
-
�
LI
LI
LI
L
IL
I L 11 11 L I LI LI
0.2
0.15
FT
�I
FI
1-1
I�
�I0.1
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 14
Hydrograph for Subcatchment 3S: Pre #3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.03
0.00
0.00
2.00
0.06
0.00
0.00
3.00
0.10
0.00
0.00
4.00
0.14
0.00
0.00
5.00
0.18
0.00
0.00
6.00
0.23
0.00
0.00
7.00
0.29
0.00
0.00
8.00
0.35
0.00
0.00
9.00
0.43
0.00
0.00
10.00
0.53
0.00
0.00
11.00
0.69
0.00
0.00
12.00
1.94
0.01
0.03
13.00
2.25
0.04
0.50
14.00
2.39
0.06
0.34
15.00
2.49
0.08
0.28
16.00
2.57
0.10
0.24
17.00
2.63
0.11
0.21
18.00
2.69
0.12
0.20
19.00
2.74
0.13
0.18
20.00
2.78
0.14
0.16
21.00
2.82
0.15
0.15
22.00
2.85
0.16
0.15
23.00
2.89
0.17
0.14
24.00
2.92
0.17
0.14
25.00
2.92
0.17
0.00
26.00
2.92
0.17
0.00
27.00
2.92
0.17
0.00
28.00
2.92
0.17
0.00
29.00
2.92
0.17
0.00
30.00
2.92
0.17
0.00
31.00
2.92
0.17
0.00
32.00
2.92
0.17
0.00
33.00
2.92
0.17
0.00
34.00
2.92
0.17
0.00
35.00
2.92
0.17
0.00
36.00
2.92
0.17
0.00
37.00
2.92
0.17
0.00
38.00
2.92
0.17
0.00
39.00
2.92
0.17
0.00
40.00
2.92
0.17
0.00
41.00
2.92
0.17
0.00
42.00
2.92
0.17
0.00
43.00
2.92
0.17
0.00
44.00
2.92
0.17
0.00
45.00
2.92
0.17
0.00
46.00
2.92
0.17
0.00
47.00
2.92
0.17
0.00
48.00
2.92
0.17
0.00
49.00
2.92
0.17
0.00
50.00
2.92
0.17
0.00
51.00
2.92
0.17
0.00
52.00
2.92
0.17
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.92
0.17
0.00
54.00
2.92
0.17
0.00
55.00
2.92
0.17
0.00
56.00
2.92
0.17
0.00
57.00
2.92
0.17
0.00
58.00
2.92
0.17
0.00
59.00
2.92
0.17
0.00
60.00
2.92
0.17
0.00
61.00
2.92
0.17
0.00
62.00
2.92
0.17
0.00
63.00
2.92
0.17
0.00
64.00
2.92
0.17
0.00
65.00
2.92
0.17
0.00
66.00
2.92
0.17
0.00
67.00
2.92
0.17
0.00
68.00
2.92
0.17
0.00
69.00
2.92
0.17
0.00
70.00
2.92
0.17
0.00
71.00
2.92
0.17
0.00
72.00
2.92
0.17
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 15
Summary for Subcatchment 5S: By -Pass #2
Runoff = 2.27 cfs @ 12.25 hrs, Volume= 0.361 af, Depth= 0.31"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 1 Year Rainfall=2.92"
Area (ac) CN Description
11.999 58 Woods/grass comb., Good, HSG B
2.200 73 Brush, Good, HSG D
14.199 60 Weighted Average
14.199 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
23.1 Direct Entry,
Subcatchment 5S: By -Pass #2
Hydrograph
I I I I i l l i I I I I ❑Runoff
2.27 cfs
2 I-1 - -F I T T F I FI FI
III IIIIIIIIIIIIII ROnloff IAlreal=l14.1199 Ad
IIII I I I III P�4gofflyoll4rq�70}3161 p#
U I I I I I I I I I I I I I I I I �ulnlo� I e� h=
33. mrn
LL
1 IIII IIIIIIIIIIIIIIIIIIIIIIII��L��
III IIIIIIIIIIIIIIIIIIIIIIIIIII
III II�IIIIIIIIIIIIIII
�� � IIIIIIIIII
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 16
Hydrograph for Subcatchment 5S: By -Pass #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.03
0.00
0.00
2.00
0.06
0.00
0.00
3.00
0.10
0.00
0.00
4.00
0.14
0.00
0.00
5.00
0.18
0.00
0.00
6.00
0.23
0.00
0.00
7.00
0.29
0.00
0.00
8.00
0.35
0.00
0.00
9.00
0.43
0.00
0.00
10.00
0.53
0.00
0.00
11.00
0.69
0.00
0.00
12.00
1.94
0.05
0.31
13.00
2.25
0.11
0.75
14.00
2.39
0.15
0.46
15.00
2.49
0.17
0.36
16.00
2.57
0.19
0.30
17.00
2.63
0.21
0.26
18.00
2.69
0.23
0.24
19.00
2.74
0.24
0.22
20.00
2.78
0.26
0.19
21.00
2.82
0.27
0.17
22.00
2.85
0.28
0.17
23.00
2.89
0.29
0.17
24.00
2.92
0.31
0.16
25.00
2.92
0.31
0.00
26.00
2.92
0.31
0.00
27.00
2.92
0.31
0.00
28.00
2.92
0.31
0.00
29.00
2.92
0.31
0.00
30.00
2.92
0.31
0.00
31.00
2.92
0.31
0.00
32.00
2.92
0.31
0.00
33.00
2.92
0.31
0.00
34.00
2.92
0.31
0.00
35.00
2.92
0.31
0.00
36.00
2.92
0.31
0.00
37.00
2.92
0.31
0.00
38.00
2.92
0.31
0.00
39.00
2.92
0.31
0.00
40.00
2.92
0.31
0.00
41.00
2.92
0.31
0.00
42.00
2.92
0.31
0.00
43.00
2.92
0.31
0.00
44.00
2.92
0.31
0.00
45.00
2.92
0.31
0.00
46.00
2.92
0.31
0.00
47.00
2.92
0.31
0.00
48.00
2.92
0.31
0.00
49.00
2.92
0.31
0.00
50.00
2.92
0.31
0.00
51.00
2.92
0.31
0.00
52.00
2.92
0.31
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.92
0.31
0.00
54.00
2.92
0.31
0.00
55.00
2.92
0.31
0.00
56.00
2.92
0.31
0.00
57.00
2.92
0.31
0.00
58.00
2.92
0.31
0.00
59.00
2.92
0.31
0.00
60.00
2.92
0.31
0.00
61.00
2.92
0.31
0.00
62.00
2.92
0.31
0.00
63.00
2.92
0.31
0.00
64.00
2.92
0.31
0.00
65.00
2.92
0.31
0.00
66.00
2.92
0.31
0.00
67.00
2.92
0.31
0.00
68.00
2.92
0.31
0.00
69.00
2.92
0.31
0.00
70.00
2.92
0.31
0.00
71.00
2.92
0.31
0.00
72.00
2.92
0.31
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 17
Summary for Subcatchment 6S: By -Pass #1
Runoff = 1.06 cfs @ 12.19 hrs, Volume= 0.162 af, Depth= 0.28"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 1 Year Rainfall=2.92"
Area (ac) CN Description
6.540 58 Woods/grass comb., Good, HSG B
0.500 73 Brush, Good, HSG D
7.040 59 Weighted Average
7.040 100.00% Pervious Area
Tc Length
min) (feet)
18.5
fl
3
0
LL
Slope Velocity Capacity Description
(ft/ft) (ft/sec) (cfs)
Direct Entry,
Subcatchment 6S: By -Pass #1
Hydrograph
II�II��II� IIIIIIIIIIIIIIII
1.06 cfs I i i ,
I `(far IRaintalll=i92'�
IRluhbff JAwea`=7.040 ad
P�ggoffYOIUMm�00 §? a#
" Tulnl lf,Depth=991Q"�c=
18.5 n
IIIIIIIIIIIIIIIII II
'Illlllllllllll II
I I l l l I l l l I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 66 68 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 18
Hydrograph for Subcatchment 6S: By -Pass #1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.03
0.00
0.00
2.00
0.06
0.00
0.00
3.00
0.10
0.00
0.00
4.00
0.14
0.00
0.00
5.00
0.18
0.00
0.00
6.00
0.23
0.00
0.00
7.00
0.29
0.00
0.00
8.00
0.35
0.00
0.00
9.00
0.43
0.00
0.00
10.00
0.53
0.00
0.00
11.00
0.69
0.00
0.00
12.00
1.94
0.04
0.21
13.00
2.25
0.10
0.31
14.00
2.39
0.13
0.20
15.00
2.49
0.15
0.17
16.00
2.57
0.17
0.14
17.00
2.63
0.19
0.12
18.00
2.69
0.20
0.11
19.00
2.74
0.22
0.10
20.00
2.78
0.23
0.09
21.00
2.82
0.24
0.08
22.00
2.85
0.25
0.08
23.00
2.89
0.27
0.08
24.00
2.92
0.28
0.08
25.00
2.92
0.28
0.00
26.00
2.92
0.28
0.00
27.00
2.92
0.28
0.00
28.00
2.92
0.28
0.00
29.00
2.92
0.28
0.00
30.00
2.92
0.28
0.00
31.00
2.92
0.28
0.00
32.00
2.92
0.28
0.00
33.00
2.92
0.28
0.00
34.00
2.92
0.28
0.00
35.00
2.92
0.28
0.00
36.00
2.92
0.28
0.00
37.00
2.92
0.28
0.00
38.00
2.92
0.28
0.00
39.00
2.92
0.28
0.00
40.00
2.92
0.28
0.00
41.00
2.92
0.28
0.00
42.00
2.92
0.28
0.00
43.00
2.92
0.28
0.00
44.00
2.92
0.28
0.00
45.00
2.92
0.28
0.00
46.00
2.92
0.28
0.00
47.00
2.92
0.28
0.00
48.00
2.92
0.28
0.00
49.00
2.92
0.28
0.00
50.00
2.92
0.28
0.00
51.00
2.92
0.28
0.00
52.00
2.92
0.28
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.92
0.28
0.00
54.00
2.92
0.28
0.00
55.00
2.92
0.28
0.00
56.00
2.92
0.28
0.00
57.00
2.92
0.28
0.00
58.00
2.92
0.28
0.00
59.00
2.92
0.28
0.00
60.00
2.92
0.28
0.00
61.00
2.92
0.28
0.00
62.00
2.92
0.28
0.00
63.00
2.92
0.28
0.00
64.00
2.92
0.28
0.00
65.00
2.92
0.28
0.00
66.00
2.92
0.28
0.00
67.00
2.92
0.28
0.00
68.00
2.92
0.28
0.00
69.00
2.92
0.28
0.00
70.00
2.92
0.28
0.00
71.00
2.92
0.28
0.00
72.00
2.92
0.28
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 19
Summary for Subcatchment P0I#2: Post -Development P0I#2
Runoff = 0.63 cfs @ 12.14 hrs, Volume= 0.060 af, Depth= 0.47"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 1 Year Rainfall=2.92"
Area (ac) CN Description
1.540 65 Woods/grass comb., Fair, HSG B
1.540 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
17.6 Direct Entry,
Subcatchment P0I#2: Post -Development P0I#2
Hydrograph
07 f11 I i,, I i I I I I I
❑Runoff
0.63 cfs
0.55
0.5
0.45
w 0.4
0.35
0
LL 0.3
I-
0.25
0.15
0.1
0.05
0 ,..
0 2 4 6 8 10
_L 11_I H
H I-i
I T I _Le�l`_�1
H H HI HI
H IHalr�j��Ig
I I I I I I I
I I I I
Rluih6ff AtOa#1.540 Ace'
k 1 H I H I HI H
H I1 44 IO"*men +Q O" If
IT 1 1 1 1 1
I I
I I�r IDep -- "I
T ='�7. �n m
- ITITI-H H
�
H I1414
TI�I�C�L�S
IT I TI TI H
T IT
IT ITI TI TI TI '
II �I
H I�1414
4-1�I�I
LI�__
—iH
rI7I_T'T
TI_rIMF-I
20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 20
Hydrograph for Subcatchment POI#2: Post -Development POI#2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.03
0.00
0.00
2.00
0.06
0.00
0.00
3.00
0.10
0.00
0.00
4.00
0.14
0.00
0.00
5.00
0.18
0.00
0.00
6.00
0.23
0.00
0.00
7.00
0.29
0.00
0.00
8.00
0.35
0.00
0.00
9.00
0.43
0.00
0.00
10.00
0.53
0.00
0.00
11.00
0.69
0.00
0.00
12.00
1.94
0.12
0.28
13.00
2.25
0.21
0.11
14.00
2.39
0.26
0.07
15.00
2.49
0.29
0.05
16.00
2.57
0.32
0.04
17.00
2.63
0.35
0.04
18.00
2.69
0.37
0.03
19.00
2.74
0.39
0.03
20.00
2.78
0.41
0.03
21.00
2.82
0.43
0.02
22.00
2.85
0.44
0.02
23.00
2.89
0.46
0.02
24.00
2.92
0.47
0.02
25.00
2.92
0.47
0.00
26.00
2.92
0.47
0.00
27.00
2.92
0.47
0.00
28.00
2.92
0.47
0.00
29.00
2.92
0.47
0.00
30.00
2.92
0.47
0.00
31.00
2.92
0.47
0.00
32.00
2.92
0.47
0.00
33.00
2.92
0.47
0.00
34.00
2.92
0.47
0.00
35.00
2.92
0.47
0.00
36.00
2.92
0.47
0.00
37.00
2.92
0.47
0.00
38.00
2.92
0.47
0.00
39.00
2.92
0.47
0.00
40.00
2.92
0.47
0.00
41.00
2.92
0.47
0.00
42.00
2.92
0.47
0.00
43.00
2.92
0.47
0.00
44.00
2.92
0.47
0.00
45.00
2.92
0.47
0.00
46.00
2.92
0.47
0.00
47.00
2.92
0.47
0.00
48.00
2.92
0.47
0.00
49.00
2.92
0.47
0.00
50.00
2.92
0.47
0.00
51.00
2.92
0.47
0.00
52.00
2.92
0.47
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.92
0.47
0.00
54.00
2.92
0.47
0.00
55.00
2.92
0.47
0.00
56.00
2.92
0.47
0.00
57.00
2.92
0.47
0.00
58.00
2.92
0.47
0.00
59.00
2.92
0.47
0.00
60.00
2.92
0.47
0.00
61.00
2.92
0.47
0.00
62.00
2.92
0.47
0.00
63.00
2.92
0.47
0.00
64.00
2.92
0.47
0.00
65.00
2.92
0.47
0.00
66.00
2.92
0.47
0.00
67.00
2.92
0.47
0.00
68.00
2.92
0.47
0.00
69.00
2.92
0.47
0.00
70.00
2.92
0.47
0.00
71.00
2.92
0.47
0.00
72.00
2.92
0.47
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 21
Summary for Subcatchment P0I#3: Post -Development P0I#3
Runoff = 2.66 cfs @ 12.10 hrs, Volume= 0.211 af, Depth= 0.55"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 1 Year Rainfall=2.92"
Area (ac) CN Description
4.318 65 Woods/grass comb., Fair, HSG B
0.317 98 Paved parking, HSG B
4.635 67 Weighted Average
4.318 93.16% Pervious Area
0.317 6.84% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
14.9 Direct Entry,
Subcatchment P0I#3: Post -Development P0I#3
Hydrograph
Ii i I I I I I , I I I I I I I I I
2.66 cfs
II'I IIII IIIII
2
IIIII IIII' IIIII
v III IIIII IIIII
3
0
u_
1 1 I_L 111 LI L1 L
1 '
I IIIIIIIIIII
IIIIIIIIIII
I I I I I I I I ���� III �4lr
1 Year IRainta4=2.k'�
HI IRunofff CAM a�=4.635 at
I P�4golffIyoll4mp70�2111 pf
�ulnIojI�Iephr .P5 '
Tc= 4. min
LI L I_t I-i I -i I _L iC�VL�7�
IIIIIIIIIIIIIIIII
//OZZIMOMMO/.
18 101'21'41'6''l�20222426283032343638404244464850525456586062646668707:�
❑ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 22
Hydrograph for Subcatchment POI#3: Post -Development POI#3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.03
0.00
0.00
2.00
0.06
0.00
0.00
3.00
0.10
0.00
0.00
4.00
0.14
0.00
0.00
5.00
0.18
0.00
0.00
6.00
0.23
0.00
0.00
7.00
0.29
0.00
0.00
8.00
0.35
0.00
0.00
9.00
0.43
0.00
0.00
10.00
0.53
0.00
0.00
11.00
0.69
0.00
0.00
12.00
1.94
0.15
1.69
13.00
2.25
0.26
0.36
14.00
2.39
0.31
0.22
15.00
2.49
0.35
0.18
16.00
2.57
0.39
0.14
17.00
2.63
0.41
0.13
18.00
2.69
0.44
0.11
19.00
2.74
0.46
0.10
20.00
2.78
0.48
0.09
21.00
2.82
0.50
0.08
22.00
2.85
0.51
0.08
23.00
2.89
0.53
0.08
24.00
2.92
0.55
0.07
25.00
2.92
0.55
0.00
26.00
2.92
0.55
0.00
27.00
2.92
0.55
0.00
28.00
2.92
0.55
0.00
29.00
2.92
0.55
0.00
30.00
2.92
0.55
0.00
31.00
2.92
0.55
0.00
32.00
2.92
0.55
0.00
33.00
2.92
0.55
0.00
34.00
2.92
0.55
0.00
35.00
2.92
0.55
0.00
36.00
2.92
0.55
0.00
37.00
2.92
0.55
0.00
38.00
2.92
0.55
0.00
39.00
2.92
0.55
0.00
40.00
2.92
0.55
0.00
41.00
2.92
0.55
0.00
42.00
2.92
0.55
0.00
43.00
2.92
0.55
0.00
44.00
2.92
0.55
0.00
45.00
2.92
0.55
0.00
46.00
2.92
0.55
0.00
47.00
2.92
0.55
0.00
48.00
2.92
0.55
0.00
49.00
2.92
0.55
0.00
50.00
2.92
0.55
0.00
51.00
2.92
0.55
0.00
52.00
2.92
0.55
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.92
0.55
0.00
54.00
2.92
0.55
0.00
55.00
2.92
0.55
0.00
56.00
2.92
0.55
0.00
57.00
2.92
0.55
0.00
58.00
2.92
0.55
0.00
59.00
2.92
0.55
0.00
60.00
2.92
0.55
0.00
61.00
2.92
0.55
0.00
62.00
2.92
0.55
0.00
63.00
2.92
0.55
0.00
64.00
2.92
0.55
0.00
65.00
2.92
0.55
0.00
66.00
2.92
0.55
0.00
67.00
2.92
0.55
0.00
68.00
2.92
0.55
0.00
69.00
2.92
0.55
0.00
70.00
2.92
0.55
0.00
71.00
2.92
0.55
0.00
72.00
2.92
0.55
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 23
Summary for Subcatchment P0I#4: Post -Development P0I#4
Runoff = 0.80 cfs @ 12.23 hrs, Volume= 0.088 af, Depth= 0.59"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 1 Year Rainfall=2.92"
Area (ac) CN Description
1.460 61 >75% Grass cover, Good, HSG B
0.336 98 Paved parking, HSG B
1.796 68 Weighted Average
1.460 81.29% Pervious Area
0.336 18.71 % Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
25.5 Direct Entry,
Subcatchment P0I#4: Post -Development P0I#4
Hydrograph
i
I
L
I
i I
I i I I i
❑Runoff
0.85
o.s
0.80 cfs
T I
T I
T
7-1H
T
T IT T`
eA t#-
°o;
IT I t
I t I
t I
tI
�I
H
0
IT +
I+
- 1
�I
H
H
T
ft"ff-Aeefaoi-.7% erd
0.6
0.6
0.55
1�
4
+-1
-H
H
H
�J ff I����J Q $ ��j
� -1 � i �- `rt�1 �-I 4G� O T I`f
3 045
+
J_I
TI
H
�I
+�I •��
i° 0.4
T-= In
0.35
-
L I
B
LI
U
Li
-i I 1 I I T I L�14Lli�
0.3
0.25
T I
T I
TI
TI
T
IT
T 17 T I T I TI F-I IT
0.5
I�
-l
—
fit
-I
-
I—
I — l—l—l— — -I -
0.1 ^
+_I
H
H
I
I_- I t t I T I t H N
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 24
Hydrograph for Subcatchment POI#4: Post -Development POI#4
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.03
0.00
0.00
2.00
0.06
0.00
0.00
3.00
0.10
0.00
0.00
4.00
0.14
0.00
0.00
5.00
0.18
0.00
0.00
6.00
0.23
0.00
0.00
7.00
0.29
0.00
0.00
8.00
0.35
0.00
0.00
9.00
0.43
0.00
0.00
10.00
0.53
0.00
0.00
11.00
0.69
0.00
0.00
12.00
1.94
0.17
0.22
13.00
2.25
0.29
0.18
14.00
2.39
0.34
0.10
15.00
2.49
0.38
0.07
16.00
2.57
0.42
0.06
17.00
2.63
0.45
0.05
18.00
2.69
0.47
0.05
19.00
2.74
0.50
0.04
20.00
2.78
0.52
0.04
21.00
2.82
0.53
0.03
22.00
2.85
0.55
0.03
23.00
2.89
0.57
0.03
24.00
2.92
0.59
0.03
25.00
2.92
0.59
0.00
26.00
2.92
0.59
0.00
27.00
2.92
0.59
0.00
28.00
2.92
0.59
0.00
29.00
2.92
0.59
0.00
30.00
2.92
0.59
0.00
31.00
2.92
0.59
0.00
32.00
2.92
0.59
0.00
33.00
2.92
0.59
0.00
34.00
2.92
0.59
0.00
35.00
2.92
0.59
0.00
36.00
2.92
0.59
0.00
37.00
2.92
0.59
0.00
38.00
2.92
0.59
0.00
39.00
2.92
0.59
0.00
40.00
2.92
0.59
0.00
41.00
2.92
0.59
0.00
42.00
2.92
0.59
0.00
43.00
2.92
0.59
0.00
44.00
2.92
0.59
0.00
45.00
2.92
0.59
0.00
46.00
2.92
0.59
0.00
47.00
2.92
0.59
0.00
48.00
2.92
0.59
0.00
49.00
2.92
0.59
0.00
50.00
2.92
0.59
0.00
51.00
2.92
0.59
0.00
52.00
2.92
0.59
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.92
0.59
0.00
54.00
2.92
0.59
0.00
55.00
2.92
0.59
0.00
56.00
2.92
0.59
0.00
57.00
2.92
0.59
0.00
58.00
2.92
0.59
0.00
59.00
2.92
0.59
0.00
60.00
2.92
0.59
0.00
61.00
2.92
0.59
0.00
62.00
2.92
0.59
0.00
63.00
2.92
0.59
0.00
64.00
2.92
0.59
0.00
65.00
2.92
0.59
0.00
66.00
2.92
0.59
0.00
67.00
2.92
0.59
0.00
68.00
2.92
0.59
0.00
69.00
2.92
0.59
0.00
70.00
2.92
0.59
0.00
71.00
2.92
0.59
0.00
72.00
2.92
0.59
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 25
Summary for Subcatchment POND#1: Post -Development Pond#1
Runoff = 5.91 cfs @ 12.25 hrs, Volume= 0.697 af, Depth= 0.51"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 1 Year Rainfall=2.92"
Area (ac) CN Description
0.670
98
Paved parking, HSG B
12.602
58
Woods/grass comb., Good, HSG B
1.894
98
Roofs, HSG A
0.504
98
Water Surface, HSG B
0.830
61
>75% Grass cover, Good, HSG B
16.500
66
Weighted Average
13.432
81.41 % Pervious Area
3.068
18.59% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
25.7 Direct Entry,
Subcatchment POND#1: Post -Development Pond#1
Hydrograph
I I I
6 5.91 cfs
5
4
w
0 3
LL
2
Type III 24-�rl
I I i `ife6alr Rafnfall=2.92'�
III I I RUnbff IAlrOar=116.1500 ad
1�1 4_°Ifyolu_�_0�617 pf
4 1 4-I� 1 �I HI H Runpff D,ep2 = -�51_ j
I I I I I I � � �c � 151(y.�-�L m
V 6
+14-1H H H
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 26
Hydrograph for Subcatchment POND#1: Post -Development Pond#1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.03
0.00
0.00
2.00
0.06
0.00
0.00
3.00
0.10
0.00
0.00
4.00
0.14
0.00
0.00
5.00
0.18
0.00
0.00
6.00
0.23
0.00
0.00
7.00
0.29
0.00
0.00
8.00
0.35
0.00
0.00
9.00
0.43
0.00
0.00
10.00
0.53
0.00
0.00
11.00
0.69
0.00
0.00
12.00
1.94
0.14
1.34
13.00
2.25
0.23
1.46
14.00
2.39
0.29
0.80
15.00
2.49
0.32
0.62
16.00
2.57
0.35
0.50
17.00
2.63
0.38
0.43
18.00
2.69
0.40
0.39
19.00
2.74
0.43
0.35
20.00
2.78
0.44
0.30
21.00
2.82
0.46
0.28
22.00
2.85
0.48
0.27
23.00
2.89
0.49
0.26
24.00
2.92
0.51
0.25
25.00
2.92
0.51
0.00
26.00
2.92
0.51
0.00
27.00
2.92
0.51
0.00
28.00
2.92
0.51
0.00
29.00
2.92
0.51
0.00
30.00
2.92
0.51
0.00
31.00
2.92
0.51
0.00
32.00
2.92
0.51
0.00
33.00
2.92
0.51
0.00
34.00
2.92
0.51
0.00
35.00
2.92
0.51
0.00
36.00
2.92
0.51
0.00
37.00
2.92
0.51
0.00
38.00
2.92
0.51
0.00
39.00
2.92
0.51
0.00
40.00
2.92
0.51
0.00
41.00
2.92
0.51
0.00
42.00
2.92
0.51
0.00
43.00
2.92
0.51
0.00
44.00
2.92
0.51
0.00
45.00
2.92
0.51
0.00
46.00
2.92
0.51
0.00
47.00
2.92
0.51
0.00
48.00
2.92
0.51
0.00
49.00
2.92
0.51
0.00
50.00
2.92
0.51
0.00
51.00
2.92
0.51
0.00
52.00
2.92
0.51
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.92
0.51
0.00
54.00
2.92
0.51
0.00
55.00
2.92
0.51
0.00
56.00
2.92
0.51
0.00
57.00
2.92
0.51
0.00
58.00
2.92
0.51
0.00
59.00
2.92
0.51
0.00
60.00
2.92
0.51
0.00
61.00
2.92
0.51
0.00
62.00
2.92
0.51
0.00
63.00
2.92
0.51
0.00
64.00
2.92
0.51
0.00
65.00
2.92
0.51
0.00
66.00
2.92
0.51
0.00
67.00
2.92
0.51
0.00
68.00
2.92
0.51
0.00
69.00
2.92
0.51
0.00
70.00
2.92
0.51
0.00
71.00
2.92
0.51
0.00
72.00
2.92
0.51
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 27
Summary for Subcatchment POND#2: Post -Development Pond #2
Runoff = 5.09 cfs @ 12.04 hrs, Volume= 0.313 af, Depth= 0.71"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 1 Year Rainfall=2.92"
Area (ac) CN Description
0.246
98
Paved parking, HSG B
3.500
58
Woods/grass comb., Good, HSG B
0.220
79
Woods/grass comb., Good, HSG D
1.010
98
Roofs, HSG A
0.272
98
Water Surface, HSG A
5.248
71
Weighted Average
3.720
70.88% Pervious Area
1.528
29.12% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
11.0 Direct Entry,
Subcatchment POND#2: Post -Development Pond #2
Hydrograph
I I I I III I I I I I I I II
❑ Runoff
5.09cfs I+ I +I H H H H � '�'+' 4-' �
5 Type II 24-hrs
111H I I kII I I `Year Rainfall=2.92'�
4 1 1 1 1 111H I I I 1 I I IRuhbfif JAwda�=5.248 Ad
1 1 1 I I I I I I 1 I P�4gofflyolurge�Ot31� p#
3 �I Runpff Depth = .7 1'j
III Tc=11. min
LL I� 4 414-14­1H HI H
i"' IIIIIIIIIIIIIIIIIIIIIIIIII'II
1 71T T1 TI T
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 28
Hydrograph for Subcatchment POND#2: Post -Development Pond #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.03
0.00
0.00
2.00
0.06
0.00
0.00
3.00
0.10
0.00
0.00
4.00
0.14
0.00
0.00
5.00
0.18
0.00
0.00
6.00
0.23
0.00
0.00
7.00
0.29
0.00
0.00
8.00
0.35
0.00
0.00
9.00
0.43
0.00
0.00
10.00
0.53
0.00
0.00
11.00
0.69
0.00
0.00
12.00
1.94
0.24
4.57
13.00
2.25
0.37
0.48
14.00
2.39
0.44
0.30
15.00
2.49
0.49
0.24
16.00
2.57
0.53
0.19
17.00
2.63
0.56
0.17
18.00
2.69
0.59
0.15
19.00
2.74
0.61
0.13
20.00
2.78
0.64
0.11
21.00
2.82
0.66
0.11
22.00
2.85
0.68
0.10
23.00
2.89
0.70
0.10
24.00
2.92
0.71
0.10
25.00
2.92
0.71
0.00
26.00
2.92
0.71
0.00
27.00
2.92
0.71
0.00
28.00
2.92
0.71
0.00
29.00
2.92
0.71
0.00
30.00
2.92
0.71
0.00
31.00
2.92
0.71
0.00
32.00
2.92
0.71
0.00
33.00
2.92
0.71
0.00
34.00
2.92
0.71
0.00
35.00
2.92
0.71
0.00
36.00
2.92
0.71
0.00
37.00
2.92
0.71
0.00
38.00
2.92
0.71
0.00
39.00
2.92
0.71
0.00
40.00
2.92
0.71
0.00
41.00
2.92
0.71
0.00
42.00
2.92
0.71
0.00
43.00
2.92
0.71
0.00
44.00
2.92
0.71
0.00
45.00
2.92
0.71
0.00
46.00
2.92
0.71
0.00
47.00
2.92
0.71
0.00
48.00
2.92
0.71
0.00
49.00
2.92
0.71
0.00
50.00
2.92
0.71
0.00
51.00
2.92
0.71
0.00
52.00
2.92
0.71
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.92
0.71
0.00
54.00
2.92
0.71
0.00
55.00
2.92
0.71
0.00
56.00
2.92
0.71
0.00
57.00
2.92
0.71
0.00
58.00
2.92
0.71
0.00
59.00
2.92
0.71
0.00
60.00
2.92
0.71
0.00
61.00
2.92
0.71
0.00
62.00
2.92
0.71
0.00
63.00
2.92
0.71
0.00
64.00
2.92
0.71
0.00
65.00
2.92
0.71
0.00
66.00
2.92
0.71
0.00
67.00
2.92
0.71
0.00
68.00
2.92
0.71
0.00
69.00
2.92
0.71
0.00
70.00
2.92
0.71
0.00
71.00
2.92
0.71
0.00
72.00
2.92
0.71
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 29
Summary for Subcatchment PRE-POI#2: Pre -Development P0I#2
Runoff = 1.78 cfs @ 12.15 hrs, Volume= 0.175 af, Depth= 0.47"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 1 Year Rainfall=2.92"
Area (ac) CN Description
4.456 65 Woods/grass comb., Fair, HSG B
4.456 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.4 Direct Entry,
U
0 1
LL
Subcatchment PRE-POI#2: Pre -Development P0I#2
Hydrograph
1.78 cfs
0 2 4 6 8 10 1214 16 1820
IRluhbff Area04.456 ad
RggofflV(oilume=0.117� p#
IIIIII F Inoff Bleo
Tc= 8. m i n
I I I I I I I I I I I I I I I I �iVL�5�
IIIIIIIIIIIIIIIIIIIII
26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
❑Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 30
Hydrograph for Subcatchment PRE-POI#2: Pre -Development POI#2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.03
0.00
0.00
2.00
0.06
0.00
0.00
3.00
0.10
0.00
0.00
4.00
0.14
0.00
0.00
5.00
0.18
0.00
0.00
6.00
0.23
0.00
0.00
7.00
0.29
0.00
0.00
8.00
0.35
0.00
0.00
9.00
0.43
0.00
0.00
10.00
0.53
0.00
0.00
11.00
0.69
0.00
0.00
12.00
1.94
0.12
0.73
13.00
2.25
0.21
0.32
14.00
2.39
0.26
0.20
15.00
2.49
0.29
0.15
16.00
2.57
0.32
0.13
17.00
2.63
0.35
0.11
18.00
2.69
0.37
0.10
19.00
2.74
0.39
0.09
20.00
2.78
0.41
0.08
21.00
2.82
0.43
0.07
22.00
2.85
0.44
0.07
23.00
2.89
0.46
0.07
24.00
2.92
0.47
0.06
25.00
2.92
0.47
0.00
26.00
2.92
0.47
0.00
27.00
2.92
0.47
0.00
28.00
2.92
0.47
0.00
29.00
2.92
0.47
0.00
30.00
2.92
0.47
0.00
31.00
2.92
0.47
0.00
32.00
2.92
0.47
0.00
33.00
2.92
0.47
0.00
34.00
2.92
0.47
0.00
35.00
2.92
0.47
0.00
36.00
2.92
0.47
0.00
37.00
2.92
0.47
0.00
38.00
2.92
0.47
0.00
39.00
2.92
0.47
0.00
40.00
2.92
0.47
0.00
41.00
2.92
0.47
0.00
42.00
2.92
0.47
0.00
43.00
2.92
0.47
0.00
44.00
2.92
0.47
0.00
45.00
2.92
0.47
0.00
46.00
2.92
0.47
0.00
47.00
2.92
0.47
0.00
48.00
2.92
0.47
0.00
49.00
2.92
0.47
0.00
50.00
2.92
0.47
0.00
51.00
2.92
0.47
0.00
52.00
2.92
0.47
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.92
0.47
0.00
54.00
2.92
0.47
0.00
55.00
2.92
0.47
0.00
56.00
2.92
0.47
0.00
57.00
2.92
0.47
0.00
58.00
2.92
0.47
0.00
59.00
2.92
0.47
0.00
60.00
2.92
0.47
0.00
61.00
2.92
0.47
0.00
62.00
2.92
0.47
0.00
63.00
2.92
0.47
0.00
64.00
2.92
0.47
0.00
65.00
2.92
0.47
0.00
66.00
2.92
0.47
0.00
67.00
2.92
0.47
0.00
68.00
2.92
0.47
0.00
69.00
2.92
0.47
0.00
70.00
2.92
0.47
0.00
71.00
2.92
0.47
0.00
72.00
2.92
0.47
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 31
Summary for Subcatchment PRE-POI#3: Pre -Development P0I#3
Runoff = 3.03 cfs @ 12.17 hrs, Volume= 0.300 af, Depth= 0.51"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 1 Year Rainfall=2.92"
Area (ac) CN
Description
6.950 65
Woods/grass comb., Fair, HSG B
0.137 98
Paved roads w/curbs & sewers, HSG B
7.087 66
Weighted Average
6.950
98.07% Pervious Area
0.137
1.93% Impervious Area
Tc Length
Slope Velocity Capacity Description
(min) (feet)
(ft/ft) (ft/sec) (cfs)
20.0
Direct Entry,
Subcatchment PRE-POI#3: Pre -Development P0I#3
Hydrograph
i I i i � i i I i i i i I i i i
� Runoff
3
3.03 cfs TIT T T T T IT T T
III 11
III 1 1 1 1 1 1 1 1 1 1 1 1 Year IRainta4=2.k'V
III 11
III 1 1 1 1 1 1 1 1 1 1 1 (Runoff JAtd&7.087 Ad
IT I
T T ' T TIT TI FfNPOI YOYTP70�399_0
^ 2
U
I I I
III ( I I I I I I I I I F�uln�O�f 1De� h� .15 `'j
I
3
°
Tc= 0.
m i n
�
I�� �II� II IIIIIIIIIII��L��
I%//////////////,%//////////////////////////////////////////////////////////////
0 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 32
Hydrograph for Subcatchment PRE-POI#3: Pre -Development POI#3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.03
0.00
0.00
2.00
0.06
0.00
0.00
3.00
0.10
0.00
0.00
4.00
0.14
0.00
0.00
5.00
0.18
0.00
0.00
6.00
0.23
0.00
0.00
7.00
0.29
0.00
0.00
8.00
0.35
0.00
0.00
9.00
0.43
0.00
0.00
10.00
0.53
0.00
0.00
11.00
0.69
0.00
0.00
12.00
1.94
0.14
1.14
13.00
2.25
0.23
0.55
14.00
2.39
0.29
0.33
15.00
2.49
0.32
0.26
16.00
2.57
0.35
0.21
17.00
2.63
0.38
0.18
18.00
2.69
0.40
0.17
19.00
2.74
0.43
0.15
20.00
2.78
0.44
0.13
21.00
2.82
0.46
0.12
22.00
2.85
0.48
0.11
23.00
2.89
0.49
0.11
24.00
2.92
0.51
0.11
25.00
2.92
0.51
0.00
26.00
2.92
0.51
0.00
27.00
2.92
0.51
0.00
28.00
2.92
0.51
0.00
29.00
2.92
0.51
0.00
30.00
2.92
0.51
0.00
31.00
2.92
0.51
0.00
32.00
2.92
0.51
0.00
33.00
2.92
0.51
0.00
34.00
2.92
0.51
0.00
35.00
2.92
0.51
0.00
36.00
2.92
0.51
0.00
37.00
2.92
0.51
0.00
38.00
2.92
0.51
0.00
39.00
2.92
0.51
0.00
40.00
2.92
0.51
0.00
41.00
2.92
0.51
0.00
42.00
2.92
0.51
0.00
43.00
2.92
0.51
0.00
44.00
2.92
0.51
0.00
45.00
2.92
0.51
0.00
46.00
2.92
0.51
0.00
47.00
2.92
0.51
0.00
48.00
2.92
0.51
0.00
49.00
2.92
0.51
0.00
50.00
2.92
0.51
0.00
51.00
2.92
0.51
0.00
52.00
2.92
0.51
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.92
0.51
0.00
54.00
2.92
0.51
0.00
55.00
2.92
0.51
0.00
56.00
2.92
0.51
0.00
57.00
2.92
0.51
0.00
58.00
2.92
0.51
0.00
59.00
2.92
0.51
0.00
60.00
2.92
0.51
0.00
61.00
2.92
0.51
0.00
62.00
2.92
0.51
0.00
63.00
2.92
0.51
0.00
64.00
2.92
0.51
0.00
65.00
2.92
0.51
0.00
66.00
2.92
0.51
0.00
67.00
2.92
0.51
0.00
68.00
2.92
0.51
0.00
69.00
2.92
0.51
0.00
70.00
2.92
0.51
0.00
71.00
2.92
0.51
0.00
72.00
2.92
0.51
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 33
Summary for Subcatchment PRE-POI#4: Pre -Development P0I#4
Runoff = 1.41 cfs @ 12.11 hrs, Volume= 0.116 af, Depth= 0.55"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 1 Year Rainfall=2.92"
Area (ac) CN Description
2.410 65 Woods/grass comb., Fair, HSG B
0.135 98 Paved parking, HSG B
2.545 67 Weighted Average
2.410 94.70% Pervious Area
0.135 5.30% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
15.9 Direct Entry,
Subcatchment PRE-POI#4: Pre -Development P0I#4
Hydrograph
I I 1.41 cfs
III 1 Year IRainta4=2.k'�
III I I IRlunoff JAM-d&2.545 ad
1 of of 0116a
I I I I I I I I I I I I I I I I I I ��� � I� I ���� � I �f
3 I
IIII �uln�J,Dep�h= .15�5' j5. m i n
III IIII IIII IIIIIIIIII��L�
Ills III IIII IIII�IIIII
IIII Il IIII�IIII� I � I
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
❑ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 34
Hydrograph for Subcatchment PRE-POI#4: Pre -Development POI#4
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.03
0.00
0.00
2.00
0.06
0.00
0.00
3.00
0.10
0.00
0.00
4.00
0.14
0.00
0.00
5.00
0.18
0.00
0.00
6.00
0.23
0.00
0.00
7.00
0.29
0.00
0.00
8.00
0.35
0.00
0.00
9.00
0.43
0.00
0.00
10.00
0.53
0.00
0.00
11.00
0.69
0.00
0.00
12.00
1.94
0.15
0.82
13.00
2.25
0.26
0.20
14.00
2.39
0.31
0.12
15.00
2.49
0.35
0.10
16.00
2.57
0.39
0.08
17.00
2.63
0.41
0.07
18.00
2.69
0.44
0.06
19.00
2.74
0.46
0.05
20.00
2.78
0.48
0.05
21.00
2.82
0.50
0.04
22.00
2.85
0.51
0.04
23.00
2.89
0.53
0.04
24.00
2.92
0.55
0.04
25.00
2.92
0.55
0.00
26.00
2.92
0.55
0.00
27.00
2.92
0.55
0.00
28.00
2.92
0.55
0.00
29.00
2.92
0.55
0.00
30.00
2.92
0.55
0.00
31.00
2.92
0.55
0.00
32.00
2.92
0.55
0.00
33.00
2.92
0.55
0.00
34.00
2.92
0.55
0.00
35.00
2.92
0.55
0.00
36.00
2.92
0.55
0.00
37.00
2.92
0.55
0.00
38.00
2.92
0.55
0.00
39.00
2.92
0.55
0.00
40.00
2.92
0.55
0.00
41.00
2.92
0.55
0.00
42.00
2.92
0.55
0.00
43.00
2.92
0.55
0.00
44.00
2.92
0.55
0.00
45.00
2.92
0.55
0.00
46.00
2.92
0.55
0.00
47.00
2.92
0.55
0.00
48.00
2.92
0.55
0.00
49.00
2.92
0.55
0.00
50.00
2.92
0.55
0.00
51.00
2.92
0.55
0.00
52.00
2.92
0.55
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.92
0.55
0.00
54.00
2.92
0.55
0.00
55.00
2.92
0.55
0.00
56.00
2.92
0.55
0.00
57.00
2.92
0.55
0.00
58.00
2.92
0.55
0.00
59.00
2.92
0.55
0.00
60.00
2.92
0.55
0.00
61.00
2.92
0.55
0.00
62.00
2.92
0.55
0.00
63.00
2.92
0.55
0.00
64.00
2.92
0.55
0.00
65.00
2.92
0.55
0.00
66.00
2.92
0.55
0.00
67.00
2.92
0.55
0.00
68.00
2.92
0.55
0.00
69.00
2.92
0.55
0.00
70.00
2.92
0.55
0.00
71.00
2.92
0.55
0.00
72.00
2.92
0.55
0.00

Weddington Acres HydroCAD Revised Layout Type/1 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 35
Summary for Pond DET POND-1: Detention Pond #1
Inflow Area = 16.500 ac, 18.59% Impervious, Inflow Depth = 0.51" for 1 Year event
Inflow = 5.91 cfs @ 12.25 hrs, Volume= 0.697 of
Outflow = 0.22 cfs @ 24.20 hrs, Volume= 0.394 af, Atten= 96%, Lag= 717.0 min
Primary = 0.22 cfs @ 24.20 hrs, Volume= 0.394 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Peak Elev= 711.40' @ 24.20 hrs Surf.Area= 12,655 sf Storage= 26,161 cf
Plug -Flow detention time= 1,642.5 min calculated for 0.394 of (56% of inflow)
Center -of -Mass det. time= 1,492.6 min ( 2,408.9 - 916.3 )
Volume Invert Avail.Storage Storage Description
#1 708.00' 104,832 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
708.00 2,289 0 0
709.00 5,540 3,915 3,915
710.00 8,705 7,123 11,037
711.00 11,744 10,225 21,262
712.00 14,012 12,878 34,140
713.00 15,752 14,882 49,022
714.00 17,548 16,650 65,672
715.00 19,401 18,475 84,146
716.00 21,970 20,686 104,832
Device Routing Invert Outlet Devices
#1 Primary 707.00' 36.0" Round Culvert
L= 111.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 707.00' / 705.00' S= 0.0180 '/' Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 7.07 sf
#2 Device 1 708.00' 1.3" Vert. WQ C= 0.600
#3 Device 1 711.33' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 2.67
Width (feet) 2.00 2.00
#4 Device 1 714.00' 48.0" x 48.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 715.00' 18.0' long x 18.0' 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) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Primary OutFlow Max=0.21 cfs @ 24.20 hrs HW=711.40' (Free Discharge)
L1=Culvert (Passes 0.21 cfs of 57.98 cfs potential flow)
2=WQ (Orifice Controls 0.08 cfs @ 8.81 fps)
3=Custom Weir/Orifice (Weir Controls 0.13 cfs @ 0.88 fps)
4=Orifi ce/G rate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=708.00' (Free Discharge)
L5= Broad -Crested Rectangular Weir( Controls 0.00 cfs)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 36
Pond DET POND-1: Detention Pond #1
Hydrograph
5.91 cfs
i t
6
5
4
LL 3
IHI
716
715
714
m
713
m
0 712
m
w 711
710
709
708
0
❑ Inflow
❑ Prim'ary
I%�Ibw Area=16.560 ac El OU
❑Secondary
1� rt fil Peak Elev=711.40'
H Storage=26,1�1 cf
IIIIIIIIIIIIIIIIIIII111111,
IIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIII
4-1 H IH I HI IH 1+ 1 H IH 1 HI H 1+ I
iiiiiiiiiiiiiiiiiii
Time (hours)
Pond DET • Detention Pond
20 40 60 80 100 120
Discharge (cfs)
140
❑ Total
❑ Primary
❑ Secondary

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 37
m
713
d
c 712
d
w 711
708 Q
0
Pond DET POND-1: Detention Pond #1
Stage -Area -Storage
Surface/HorizontaiMetted Area (sq-ft)
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000
40,000 50,000 60,000 70,000 80,000 90,000 100,000
Storage (cubic -feet)
Surface
❑ Storage

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 38
Hydrograph for Pond DET POND-1: Detention Pond #1
Time
Inflow
Storage
Elevation
Outflow
Primary
Secondary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
(cfs)
(cfs)
0.00
0.00
0
708.00
0.00
0.00
0.00
2.50
0.00
0
708.00
0.00
0.00
0.00
5.00
0.00
0
708.00
0.00
0.00
0.00
7.50
0.00
0
708.00
0.00
0.00
0.00
10.00
0.00
0
708.00
0.00
0.00
0.00
12.50
3.46
8,218
709.65
0.06
0.06
0.00
15.00
0.62
17,821
710.69
0.07
0.07
0.00
17.50
0.41
21,583
711.03
0.08
0.08
0.00
20.00
0.30
24,098
711.24
0.08
0.08
0.00
22.50
0.26
25,768
711.37
0.14
0.14
0.00
25.00
0.00
25,795
711.37
0.15
0.15
0.00
27.50
0.00
24,950
711.31
0.08
0.08
0.00
30.00
0.00
24,233
711.25
0.08
0.08
0.00
32.50
0.00
23,522
711.19
0.08
0.08
0.00
35.00
0.00
22,818
711.13
0.08
0.08
0.00
37.50
0.00
22,121
711.07
0.08
0.08
0.00
40.00
0.00
21,430
711.01
0.08
0.08
0.00
42.50
0.00
20,747
710.96
0.08
0.08
0.00
45.00
0.00
20,070
710.90
0.07
0.07
0.00
47.50
0.00
19,400
710.84
0.07
0.07
0.00
50.00
0.00
18,737
710.78
0.07
0.07
0.00
52.50
0.00
18,081
710.72
0.07
0.07
0.00
55.00
0.00
17,433
710.66
0.07
0.07
0.00
57.50
0.00
16,792
710.60
0.07
0.07
0.00
60.00
0.00
16,159
710.54
0.07
0.07
0.00
62.50
0.00
15,533
710.48
0.07
0.07
0.00
65.00
0.00
14,915
710.42
0.07
0.07
0.00
67.50
0.00
14,306
710.35
0.07
0.07
0.00
70.00
0.00
13,704
710.29
0.07
0.07
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 39
Stage -Discharge for Pond DET POND-1: Detention Pond #1
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
708.00
0.00
0.00
0.00
708.10
0.01
0.01
0.00
708.20
0.02
0.02
0.00
708.30
0.02
0.02
0.00
708.40
0.03
0.03
0.00
708.50
0.03
0.03
0.00
708.60
0.03
0.03
0.00
708.70
0.04
0.04
0.00
708.80
0.04
0.04
0.00
708.90
0.04
0.04
0.00
709.00
0.04
0.04
0.00
709.10
0.05
0.05
0.00
709.20
0.05
0.05
0.00
709.30
0.05
0.05
0.00
709.40
0.05
0.05
0.00
709.50
0.05
0.05
0.00
709.60
0.06
0.06
0.00
709.70
0.06
0.06
0.00
709.80
0.06
0.06
0.00
709.90
0.06
0.06
0.00
710.00
0.06
0.06
0.00
710.10
0.06
0.06
0.00
710.20
0.07
0.07
0.00
710.30
0.07
0.07
0.00
710.40
0.07
0.07
0.00
710.50
0.07
0.07
0.00
710.60
0.07
0.07
0.00
710.70
0.07
0.07
0.00
710.80
0.07
0.07
0.00
710.90
0.07
0.07
0.00
711.00
0.08
0.08
0.00
711.10
0.08
0.08
0.00
711.20
0.08
0.08
0.00
711.30
0.08
0.08
0.00
711.40
0.20
0.20
0.00
711.50
0.54
0.54
0.00
711.60
1.00
1.00
0.00
711.70
1.56
1.56
0.00
711.80
2.20
2.20
0.00
711.90
2.91
2.91
0.00
712.00
3.68
3.68
0.00
712.10
4.51
4.51
0.00
712.20
5.41
5.41
0.00
712.30
6.35
6.35
0.00
712.40
7.34
7.34
0.00
712.50
8.38
8.38
0.00
712.60
9.47
9.47
0.00
712.70
10.60
10.60
0.00
712.80
11.77
11.77
0.00
712.90
12.98
12.98
0.00
713.00
14.23
14.23
0.00
713.10
15.52
15.52
0.00
713.20
16.85
16.85
0.00
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
713.30
18.21
18.21
0.00
713.40
19.61
19.61
0.00
713.50
21.04
21.04
0.00
713.60
22.51
22.51
0.00
713.70
24.00
24.00
0.00
713.80
25.53
25.53
0.00
713.90
27.09
27.09
0.00
714.00
28.68
28.68
0.00
714.10
31.75
31.75
0.00
714.20
36.05
36.05
0.00
714.30
41.16
41.16
0.00
714.40
46.92
46.92
0.00
714.50
53.26
53.26
0.00
714.60
60.12
60.12
0.00
714.70
67.44
67.44
0.00
714.80
75.20
75.20
0.00
714.90
83.38
83.38
0.00
715.00
86.77
86.77
0.00
715.10
88.96
87.44
1.53
715.20
92.41
88.10
4.31
715.30
96.71
88.75
7.96
715.40
101.70
89.40
12.29
715.50
107.23
90.05
17.18
715.60
113.28
90.69
22.59
715.70
119.47
91.33
28.15
715.80
125.96
91.96
34.00
715.90
133.08
92.59
40.50
716.00
140.55
93.21
47.34

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 40
Stage -Area -Storage for Pond DET POND-1: Detention Pond #1
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
708.00
2,289
0
708.10
2,614
245
708.20
2,939
523
708.30
3,264
833
708.40
3,589
1,176
708.50
3,915
1,551
708.60
4,240
1,959
708.70
4,565
2,399
708.80
4,890
2,872
708.90
5,215
3,377
709.00
5,540
3,915
709.10
5,857
4,484
709.20
6,173
5,086
709.30
6,489
5,719
709.40
6,806
6,384
709.50
7,123
7,080
709.60
7,439
7,808
709.70
7,756
8,568
709.80
8,072
9,359
709.90
8,388
10,182
710.00
8,705
11,037
710.10
9,009
11,923
710.20
9,313
12,839
710.30
9,617
13,785
710.40
9,921
14,762
710.50
10,225
15,769
710.60
10,528
16,807
710.70
10,832
17,875
710.80
11,136
18,973
710.90
11,440
20,102
711.00
11,744
21,262
711.10
11,971
22,447
711.20
12,198
23,656
711.30
12,424
24,887
711.40
12,651
26,141
711.50
12,878
27,417
711.60
13,105
28,716
711.70
13,332
30,038
711.80
13,558
31,382
711.90
13,785
32,750
712.00
14,012
34,140
712.10
14,186
35,549
712.20
14,360
36,977
712.30
14,534
38,421
712.40
14,708
39,883
712.50
14,882
41,363
712.60
15,056
42,860
712.70
15,230
44,374
712.80
15,404
45,906
712.90
15,578
47,455
713.00
15,752
49,022
713.10
15,932
50,606
713.20
16,111
52,208
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
713.30
16,291
53,828
713.40
16,470
55,466
713.50
16,650
57,122
713.60
16,830
58,796
713.70
17,009
60,488
713.80
17,189
62,198
713.90
17,368
63,926
714.00
17,548
65,672
714.10
17,733
67,436
714.20
17,919
69,218
714.30
18,104
71,019
714.40
18,289
72,839
714.50
18,475
74,677
714.60
18,660
76,534
714.70
18,845
78,409
714.80
19,030
80,303
714.90
19,216
82,215
715.00
19,401
84,146
715.10
19,658
86,099
715.20
19,915
88,078
715.30
20,172
90,082
715.40
20,429
92,112
715.50
20,686
94,168
715.60
20,942
96,249
715.70
21,199
98,356
715.80
21,456
100,489
715.90
21,713
102,647
716.00
21,970
104,832

Weddington Acres HydroCAD Revised Layout Type/1 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 41
Summary for Pond DET POND-2: Detention Pond #2
Inflow Area = 5.248 ac, 29.12% Impervious, Inflow Depth = 0.71" for 1 Year event
Inflow = 5.09 cfs @ 12.04 hrs, Volume= 0.313 of
Outflow = 0.10 cfs @ 21.64 hrs, Volume= 0.296 af, Atten= 98%, Lag= 575.6 min
Primary = 0.10 cfs @ 21.64 hrs, Volume= 0.296 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Peak Elev= 698.84' @ 21.64 hrs Surf.Area= 6,803 sf Storage= 9,929 cf
Plug -Flow detention time= 1,346.5 min calculated for 0.296 of (95% of inflow)
Center -of -Mass det. time= 1,317.8 min ( 2,198.5 - 880.7 )
Volume Invert Avail.Storage Storage Description
#1 697.00' 49,496 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
697.00 3,325 0 0
698.00 5,881 4,603 4,603
699.00 6,979 6,430 11,033
700.00 8,219 7,599 18,632
701.00 9,671 8,945 27,577
702.00 11,155 10,413 37,990
703.00 11,857 11,506 49,496
Device Routing Invert Outlet Devices
#1 Primary 696.00' 24.0" Round RCP -Round 24"
L= 66.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 696.00' / 695.00' S= 0.0152 '/' Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 3.14 sf
#2 Device 1 697.00' 1.5" Vert. WQ C= 0.600
#3 Device 1 698.82' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 2.18
Width (feet) 2.00 2.00
#4 Device 1 701.00' 48.0" x 48.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 702.00' 10.0' 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=0.10 cfs @ 21.64 hrs HW=698.84' (Free Discharge)
L1=RCP_Round 24" (Passes 0.10 cfs of 20.52 cfs potential flow)
2=WQ (Orifice Controls 0.08 cfs @ 6.42 fps)
3=Custom Weir/Orifice (Weir Controls 0.02 cfs @ 0.46 fps)
4=Orifi ce/G rate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=697.00' (Free Discharge)
L5= Broad -Crested Rectangular Weir( Controls 0.00 cfs)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 42
Pond DET POND-2: Detention Pond #2
Hydrograph
I I I I I I I I I I I I I I I I I I I I I I LInflow 1cfs 1-f TI ryi�fi����2 rdary
I I III I Pelakl E 6if*60.8VI
5
III I I I I I I I I I I SItOMgleI:=9;91291Ofl
4 ICI I-TITI F-1 T171 I7ITI T-1 171TI FT ITI
3 I�_II�I �IIII'llllll _I
LL
IIIIII IIIIIIIIII
2 I TI FT M
Ii111111111111 11111'
1
0.10 cfs
0.00 cfs
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
Pond DET POND-2: Detention Pond #2
Stage -Discharge
■ Total
■ Primary
■ Secondary
0 5 10 15 20 25 30 35 40 45 50 55 60
Discharge (cfs)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 43
Pond DET POND-2: Detention Pond #2
Stage -Area -Storage
Surface/Horizontal/Wetted Area (sq-ft)
1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000
Storage (cubic -feet)
Surface
❑ Storage

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 44
Hydrograph for Pond DET POND-2: Detention Pond #2
Time
Inflow
Storage
Elevation
Outflow
Primary
Secondary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
(cfs)
(cfs)
0.00
0.00
0
697.00
0.00
0.00
0.00
2.50
0.00
0
697.00
0.00
0.00
0.00
5.00
0.00
0
697.00
0.00
0.00
0.00
7.50
0.00
0
697.00
0.00
0.00
0.00
10.00
0.00
0
697.00
0.00
0.00
0.00
12.50
0.82
5,659
698.18
0.06
0.06
0.00
15.00
0.24
8,401
698.61
0.07
0.07
0.00
17.50
0.16
9,424
698.77
0.08
0.08
0.00
20.00
0.11
9,904
698.84
0.10
0.10
0.00
22.50
0.10
9,925
698.84
0.10
0.10
0.00
25.00
0.00
9,659
698.80
0.08
0.08
0.00
27.50
0.00
8,969
698.70
0.08
0.08
0.00
30.00
0.00
8,300
698.60
0.07
0.07
0.00
32.50
0.00
7,652
698.50
0.07
0.07
0.00
35.00
0.00
7,027
698.40
0.07
0.07
0.00
37.50
0.00
6,424
698.30
0.07
0.07
0.00
40.00
0.00
5,843
698.21
0.06
0.06
0.00
42.50
0.00
5,286
698.11
0.06
0.06
0.00
45.00
0.00
4,752
698.03
0.06
0.06
0.00
47.50
0.00
4,243
697.94
0.06
0.06
0.00
50.00
0.00
3,758
697.85
0.05
0.05
0.00
52.50
0.00
3,298
697.77
0.05
0.05
0.00
55.00
0.00
2,866
697.68
0.05
0.05
0.00
57.50
0.00
2,461
697.60
0.04
0.04
0.00
60.00
0.00
2,086
697.52
0.04
0.04
0.00
62.50
0.00
1,741
697.45
0.04
0.04
0.00
65.00
0.00
1,428
697.38
0.03
0.03
0.00
67.50
0.00
1,147
697.31
0.03
0.03
0.00
70.00
0.00
901
697.25
0.03
0.03
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 45
Stage -Discharge for Pond DET POND-2: Detention Pond #2
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
697.00
0.00
0.00
0.00
697.10
0.01
0.01
0.00
697.20
0.02
0.02
0.00
697.30
0.03
0.03
0.00
697.40
0.03
0.03
0.00
697.50
0.04
0.04
0.00
697.60
0.04
0.04
0.00
697.70
0.05
0.05
0.00
697.80
0.05
0.05
0.00
697.90
0.05
0.05
0.00
698.00
0.06
0.06
0.00
698.10
0.06
0.06
0.00
698.20
0.06
0.06
0.00
698.30
0.07
0.07
0.00
698.40
0.07
0.07
0.00
698.50
0.07
0.07
0.00
698.60
0.07
0.07
0.00
698.70
0.08
0.08
0.00
698.80
0.08
0.08
0.00
698.90
0.23
0.23
0.00
699.00
0.58
0.58
0.00
699.10
1.05
1.05
0.00
699.20
1.62
1.62
0.00
699.30
2.27
2.27
0.00
699.40
2.98
2.98
0.00
699.50
3.77
3.77
0.00
699.60
4.61
4.61
0.00
699.70
5.50
5.50
0.00
699.80
6.45
6.45
0.00
699.90
7.45
7.45
0.00
700.00
8.50
8.50
0.00
700.10
9.59
9.59
0.00
700.20
10.72
10.72
0.00
700.30
11.90
11.90
0.00
700.40
13.12
13.12
0.00
700.50
14.37
14.37
0.00
700.60
15.67
15.67
0.00
700.70
17.00
17.00
0.00
700.80
18.36
18.36
0.00
700.90
19.76
19.76
0.00
701.00
21.20
21.20
0.00
701.10
24.12
24.12
0.00
701.20
28.26
28.26
0.00
701.30
31.37
31.37
0.00
701.40
31.73
31.73
0.00
701.50
32.09
32.09
0.00
701.60
32.44
32.44
0.00
701.70
32.79
32.79
0.00
701.80
33.14
33.14
0.00
701.90
33.48
33.48
0.00
702.00
33.82
33.82
0.00
702.10
34.95
34.16
0.79
702.20
36.72
34.49
2.23
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
702.30
38.97
34.82
4.15
702.40
41.63
35.15
6.48
702.50
44.77
35.48
9.30
702.60
48.34
35.80
12.55
702.70
51.90
36.11
15.78
702.80
55.68
36.43
19.25
702.90
59.67
36.74
22.92
703.00
63.85
37.05
26.80

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 46
Stage -Area -Storage for Pond DET POND-2: Detention Pond #2
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
697.00
3,325
0
697.10
3,581
345
697.20
3,836
716
697.30
4,092
1,113
697.40
4,347
1,534
697.50
4,603
1,982
697.60
4,859
2,455
697.70
5,114
2,954
697.80
5,370
3,478
697.90
5,625
4,028
698.00
5,881
4,603
698.10
5,991
5,197
698.20
6,101
5,801
698.30
6,210
6,417
698.40
6,320
7,043
698.50
6,430
7,681
698.60
6,540
8,329
698.70
6,650
8,989
698.80
6,759
9,659
698.90
6,869
10,341
699.00
6,979
11,033
699.10
7,103
11,737
699.20
7,227
12,454
699.30
7,351
13,182
699.40
7,475
13,924
699.50
7,599
14,678
699.60
7,723
15,444
699.70
7,847
16,222
699.80
7,971
17,013
699.90
8,095
17,816
700.00
8,219
18,632
700.10
8,364
19,461
700.20
8,509
20,305
700.30
8,655
21,163
700.40
8,800
22,036
700.50
8,945
22,923
700.60
9,090
23,825
700.70
9,235
24,741
700.80
9,381
25,672
700.90
9,526
26,617
701.00
9,671
27,577
701.10
9,819
28,552
701.20
9,968
29,541
701.30
10,116
30,545
701.40
10,265
31,564
701.50
10,413
32,598
701.60
10,561
33,647
701.70
10,710
34,710
701.80
10,858
35,789
701.90
11,007
36,882
702.00
11,155
37,990
702.10
11,225
39,109
702.20
11,295
40,235
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
702.30
11,366
41,368
702.40
11,436
42,508
702.50
11,506
43,655
702.60
11,576
44,809
702.70
11,646
45,970
702.80
11,717
47,139
702.90
11,787
48,314
703.00
11,857
49,496

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 47
Summary for Link 4L: Pre -Development POI
Inflow Area = 36.865 ac, 0.00% Impervious, Inflow Depth = 0.23" for 1 Year event
Inflow = 3.40 cfs @ 12.25 hrs, Volume= 0.708 of
Primary = 3.40 cfs @ 12.25 hrs, Volume= 0.708 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Link 4L: Pre -Development POI
Hydrograph
❑ Inflow
❑ Primary
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 48
Hydrograph for Link 4L: Pre -Development POI
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.00
0.00
0.00
2.00
0.00
0.00
0.00
3.00
0.00
0.00
0.00
4.00
0.00
0.00
0.00
5.00
0.00
0.00
0.00
6.00
0.00
0.00
0.00
7.00
0.00
0.00
0.00
8.00
0.00
0.00
0.00
9.00
0.00
0.00
0.00
10.00
0.00
0.00
0.00
11.00
0.00
0.00
0.00
12.00
0.42
0.00
0.42
13.00
1.44
0.00
1.44
14.00
0.93
0.00
0.93
15.00
0.76
0.00
0.76
16.00
0.64
0.00
0.64
17.00
0.56
0.00
0.56
18.00
0.52
0.00
0.52
19.00
0.46
0.00
0.46
20.00
0.40
0.00
0.40
21.00
0.38
0.00
0.38
22.00
0.37
0.00
0.37
23.00
0.36
0.00
0.36
24.00
0.35
0.00
0.35
25.00
0.00
0.00
0.00
26.00
0.00
0.00
0.00
27.00
0.00
0.00
0.00
28.00
0.00
0.00
0.00
29.00
0.00
0.00
0.00
30.00
0.00
0.00
0.00
31.00
0.00
0.00
0.00
32.00
0.00
0.00
0.00
33.00
0.00
0.00
0.00
34.00
0.00
0.00
0.00
35.00
0.00
0.00
0.00
36.00
0.00
0.00
0.00
37.00
0.00
0.00
0.00
38.00
0.00
0.00
0.00
39.00
0.00
0.00
0.00
40.00
0.00
0.00
0.00
41.00
0.00
0.00
0.00
42.00
0.00
0.00
0.00
43.00
0.00
0.00
0.00
44.00
0.00
0.00
0.00
45.00
0.00
0.00
0.00
46.00
0.00
0.00
0.00
47.00
0.00
0.00
0.00
48.00
0.00
0.00
0.00
49.00
0.00
0.00
0.00
50.00
0.00
0.00
0.00
51.00
0.00
0.00
0.00
52.00
0.00
0.00
0.00
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.00
0.00
0.00
54.00
0.00
0.00
0.00
55.00
0.00
0.00
0.00
56.00
0.00
0.00
0.00
57.00
0.00
0.00
0.00
58.00
0.00
0.00
0.00
59.00
0.00
0.00
0.00
60.00
0.00
0.00
0.00
61.00
0.00
0.00
0.00
62.00
0.00
0.00
0.00
63.00
0.00
0.00
0.00
64.00
0.00
0.00
0.00
65.00
0.00
0.00
0.00
66.00
0.00
0.00
0.00
67.00
0.00
0.00
0.00
68.00
0.00
0.00
0.00
69.00
0.00
0.00
0.00
70.00
0.00
0.00
0.00
71.00
0.00
0.00
0.00
72.00
0.00
0.00
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 49
Summary for Link P0I#1: Post -Development P0I#1
Inflow Area = 42.987 ac, 10.69% Impervious, Inflow Depth > 0.34" for 1 Year event
Inflow = 3.36 cfs @ 12.23 hrs, Volume= 1.213 of
Primary = 3.36 cfs @ 12.23 hrs, Volume= 1.213 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Link P0I#1: Post -Development P0I#1
Hydrograph
❑ Inflow
❑ Primary
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 1 Year Rainfall=2.92"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 50
Hydrograph for Link P0I#1: Post -Development P0I#1
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.00
0.00
0.00
2.00
0.00
0.00
0.00
3.00
0.00
0.00
0.00
4.00
0.00
0.00
0.00
5.00
0.00
0.00
0.00
6.00
0.00
0.00
0.00
7.00
0.00
0.00
0.00
8.00
0.00
0.00
0.00
9.00
0.00
0.00
0.00
10.00
0.00
0.00
0.00
11.00
0.00
0.00
0.00
12.00
0.57
0.00
0.57
13.00
1.19
0.00
1.19
14.00
0.80
0.00
0.80
15.00
0.68
0.00
0.68
16.00
0.59
0.00
0.59
17.00
0.54
0.00
0.54
18.00
0.51
0.00
0.51
19.00
0.47
0.00
0.47
20.00
0.45
0.00
0.45
21.00
0.44
0.00
0.44
22.00
0.46
0.00
0.46
23.00
0.53
0.00
0.53
24.00
0.56
0.00
0.56
25.00
0.23
0.00
0.23
26.00
0.17
0.00
0.17
27.00
0.16
0.00
0.16
28.00
0.15
0.00
0.15
29.00
0.15
0.00
0.15
30.00
0.15
0.00
0.15
31.00
0.15
0.00
0.15
32.00
0.15
0.00
0.15
33.00
0.15
0.00
0.15
34.00
0.15
0.00
0.15
35.00
0.15
0.00
0.15
36.00
0.14
0.00
0.14
37.00
0.14
0.00
0.14
38.00
0.14
0.00
0.14
39.00
0.14
0.00
0.14
40.00
0.14
0.00
0.14
41.00
0.14
0.00
0.14
42.00
0.14
0.00
0.14
43.00
0.14
0.00
0.14
44.00
0.13
0.00
0.13
45.00
0.13
0.00
0.13
46.00
0.13
0.00
0.13
47.00
0.13
0.00
0.13
48.00
0.13
0.00
0.13
49.00
0.13
0.00
0.13
50.00
0.13
0.00
0.13
51.00
0.12
0.00
0.12
52.00
0.12
0.00
0.12
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.12
0.00
0.12
54.00
0.12
0.00
0.12
55.00
0.12
0.00
0.12
56.00
0.12
0.00
0.12
57.00
0.11
0.00
0.11
58.00
0.11
0.00
0.11
59.00
0.11
0.00
0.11
60.00
0.11
0.00
0.11
61.00
0.11
0.00
0.11
62.00
0.11
0.00
0.11
63.00
0.10
0.00
0.10
64.00
0.10
0.00
0.10
65.00
0.10
0.00
0.10
66.00
0.10
0.00
0.10
67.00
0.10
0.00
0.10
68.00
0.10
0.00
0.10
69.00
0.09
0.00
0.09
70.00
0.09
0.00
0.09
71.00
0.09
0.00
0.09
72.00
0.09
0.00
0.09

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Paae 51
Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment IS: Pre #1 Runoff Area=9.570 ac 0.00% Impervious Runoff Depth=0.46"
Tc=18.5 min CN=58 Runoff=3.26 cfs 0.368 of
Subcatchment2S: Pre #2 Runoff Area=10.386 ac 0.00% Impervious Runoff Depth=0.54"
Tc=23.8 min CN=60 Runoff=3.87 cfs 0.467 of
Subcatchment3S: Pre #3 Runoff Area=16.909 ac 0.00% Impervious Runoff Depth=0.35"
Tc=23.6 min CN=55 Runoff=2.96 cfs 0.497 of
Subcatchment5S: By-Pass#2 Runoff Area=14.199 ac 0.00% Impervious Runoff Depth=0.54"
Tc=23.1 min CN=60 Runoff=5.42 cfs 0.639 of
Subcatchment6S: By-Pass#1 Runoff Area=7.040 ac 0.00% Impervious Runoff Depth=0.50"
Tc=18.5 min CN=59 Runoff=2.76 cfs 0.293 of
SubcatchmentPOI#2: Post -Development Runoff Area=1.540 ac 0.00% Impervious Runoff Depth=0.76"
Tc=17.6 min CN=65 Runoff=1.18 cfs 0.098 of
SubcatchmentPOI#3: Post -Development Runoff Area=4.635 ac 6.84% Impervious Runoff Depth=0.86"
Tc=14.9 min CN=67 Runoff=4.64 cfs 0.333 of
SubcatchmentPOI#4: Post -Development Runoff Area=1.796 ac 18.71% Impervious Runoff Depth=0.91"
Tc=25.5 min CN=68 Runoff=1.39 cfs 0.137 of
SubcatchmentPOND#1: Runoff Area=16.500 ac 18.59% Impervious Runoff Depth=0.81"
Tc=25.7 min CN=66 Runoff=10.79 cfs 1.115 of
Subcatchment POND#2: Post -Development Runoff Area=5.248 ac 29.12% Impervious Runoff Depth=1.08"
Tc=11.0 min CN=71 Runoff=8.00 cfs 0.471 of
Subcatchment PRE-POI#2: Pre -Development Runoff Area=4.456 ac 0.00% Impervious Runoff Depth=0.76"
Tc=18.4 min CN=65 Runoff=3.34 cfs 0.283 of
Subcatchment PRE-POI#3: Pre -Development Runoff Area=7.087 ac 1.93% Impervious Runoff Depth=0.81"
Tc=20.0 min CN=66 Runoff=5.49 cfs 0.479 of
Subcatchment PRE-POI#4: Pre -Development Runoff Area=2.545 ac 5.30% Impervious Runoff Depth=0.86"
Tc=15.9 min CN=67 Runoff=2.46 cfs 0.183 of
Pond DIET POND-1: Detention Pond #1 Peak Elev=711.57' Storage=28,272 cf Inflow=10.79 cfs 1.115 of
Primary=0.84 cfs 0.809 of Secondary=0.00 cfs 0.000 of Outflow=0.84 cfs 0.809 of
Pond DIET POND-2: Detention Pond #2 Peak Elev=698.98' Storage=10,884 cf Inflow=8.00 cfs 0.471 of
Primary=0.50 cfs 0.453 of Secondary=0.00 cfs 0.000 of Outflow=0.50 cfs 0.453 of
Link 4L: Pre-DevelopmentPOI Inflow=9.78 cfs 1.332 of
Primary=9.78 cfs 1.332 of

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 52
Link POI#1: Post-DevelopmentPO1#1
Inflow=8.14 cfs 2.194 of
Primary=8.14 cfs 2.194 of
Total Runoff Area = 101.911 ac Runoff Volume = 5.362 of Average Runoff Depth = 0.63"
94.58% Pervious = 96.390 ac 5.42% Impervious = 5.521 ac

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 53
Summary for Subcatchment 1S: Pre #1
Runoff = 3.26 cfs @ 12.16 hrs, Volume= 0.368 af, Depth= 0.46"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 2 Year Rainfall=3.52"
Area (ac) CN Description
8.570 55 Woods, Good, HSG B
1.000 79 Woods/grass comb., Good, HSG D
9.570 58 Weighted Average
9.570 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.5 Direct Entry,
Subcatchment 1 S: Pre #1
Hydrograph
❑ Runoff
3.26 cfs I I I I I I I I I I I I I I I I
Type II 24-hr
3 1 1 1 Year Rainfall=3.52"
III Runoff Area=9.570 ac
I� Runoff Volume=0.368 of 2-Runoff Depth=0.46"
III Illlllllllllll111i11
LL Tc=18.5 min
C N =58
11 —1 T 11I -I -r-I tI 1i ri I—t Irt Irt Irt l -rl -I
III lP IIIIIIIIIIIIIII 'I
� I I I�IIIII�IIIII�II
.....................................
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 54
Hydrograph for Subcatchment 1S: Pre #1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.04
0.00
0.00
2.00
0.08
0.00
0.00
3.00
0.12
0.00
0.00
4.00
0.17
0.00
0.00
5.00
0.22
0.00
0.00
6.00
0.28
0.00
0.00
7.00
0.35
0.00
0.00
8.00
0.42
0.00
0.00
9.00
0.52
0.00
0.00
10.00
0.64
0.00
0.00
11.00
0.83
0.00
0.00
12.00
2.33
0.10
1.04
13.00
2.72
0.19
0.69
14.00
2.89
0.24
0.43
15.00
3.00
0.28
0.35
16.00
3.10
0.31
0.28
17.00
3.17
0.33
0.25
18.00
3.24
0.36
0.23
19.00
3.30
0.38
0.20
20.00
3.35
0.40
0.17
21.00
3.40
0.41
0.16
22.00
3.44
0.43
0.16
23.00
3.48
0.45
0.15
24.00
3.52
0.46
0.15
25.00
3.52
0.46
0.00
26.00
3.52
0.46
0.00
27.00
3.52
0.46
0.00
28.00
3.52
0.46
0.00
29.00
3.52
0.46
0.00
30.00
3.52
0.46
0.00
31.00
3.52
0.46
0.00
32.00
3.52
0.46
0.00
33.00
3.52
0.46
0.00
34.00
3.52
0.46
0.00
35.00
3.52
0.46
0.00
36.00
3.52
0.46
0.00
37.00
3.52
0.46
0.00
38.00
3.52
0.46
0.00
39.00
3.52
0.46
0.00
40.00
3.52
0.46
0.00
41.00
3.52
0.46
0.00
42.00
3.52
0.46
0.00
43.00
3.52
0.46
0.00
44.00
3.52
0.46
0.00
45.00
3.52
0.46
0.00
46.00
3.52
0.46
0.00
47.00
3.52
0.46
0.00
48.00
3.52
0.46
0.00
49.00
3.52
0.46
0.00
50.00
3.52
0.46
0.00
51.00
3.52
0.46
0.00
52.00
3.52
0.46
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.52
0.46
0.00
54.00
3.52
0.46
0.00
55.00
3.52
0.46
0.00
56.00
3.52
0.46
0.00
57.00
3.52
0.46
0.00
58.00
3.52
0.46
0.00
59.00
3.52
0.46
0.00
60.00
3.52
0.46
0.00
61.00
3.52
0.46
0.00
62.00
3.52
0.46
0.00
63.00
3.52
0.46
0.00
64.00
3.52
0.46
0.00
65.00
3.52
0.46
0.00
66.00
3.52
0.46
0.00
67.00
3.52
0.46
0.00
68.00
3.52
0.46
0.00
69.00
3.52
0.46
0.00
70.00
3.52
0.46
0.00
71.00
3.52
0.46
0.00
72.00
3.52
0.46
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 55
Summary for Subcatchment 2S: Pre #2
Runoff = 3.87 cfs @ 12.23 hrs, Volume= 0.467 af, Depth= 0.54"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 2 Year Rainfall=3.52"
Area (ac) CN Description
8.386 55 Woods, Good, HSG B
2.000 79 Woods/grass comb., Good, HSG D
10.386 60 Weighted Average
10.386 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
23.8 Direct Entry,
Subcatchment 2S: Pre #2
Hydrograph
IIII II li�lllll �I�
4 3.87 cfs Typ� III 24-hrs
` 6zir Rain6lll=3.52'�
3 IT T T I T T T I TI TI �n df Area*=10.3H 6d
III P�ggofflVolum�0}4§7 pf
w unp f,Deplh
z, T MITI T T T T T�T
LL Tc=23.8 min
III Illlllllllllllllllii�iil��_��
1
IIIIIIIIIIIIII
1
1 1 1 1 1 1 .1 62 64 66 68 iO
❑ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 56
Hydrograph for Subcatchment 2S: Pre #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.04
0.00
0.00
2.00
0.08
0.00
0.00
3.00
0.12
0.00
0.00
4.00
0.17
0.00
0.00
5.00
0.22
0.00
0.00
6.00
0.28
0.00
0.00
7.00
0.35
0.00
0.00
8.00
0.42
0.00
0.00
9.00
0.52
0.00
0.00
10.00
0.64
0.00
0.00
11.00
0.83
0.00
0.00
12.00
2.33
0.13
0.88
13.00
2.72
0.24
0.95
14.00
2.89
0.29
0.55
15.00
3.00
0.33
0.43
16.00
3.10
0.37
0.35
17.00
3.17
0.40
0.30
18.00
3.24
0.42
0.27
19.00
3.30
0.45
0.24
20.00
3.35
0.47
0.21
21.00
3.40
0.49
0.19
22.00
3.44
0.51
0.19
23.00
3.48
0.52
0.18
24.00
3.52
0.54
0.18
25.00
3.52
0.54
0.00
26.00
3.52
0.54
0.00
27.00
3.52
0.54
0.00
28.00
3.52
0.54
0.00
29.00
3.52
0.54
0.00
30.00
3.52
0.54
0.00
31.00
3.52
0.54
0.00
32.00
3.52
0.54
0.00
33.00
3.52
0.54
0.00
34.00
3.52
0.54
0.00
35.00
3.52
0.54
0.00
36.00
3.52
0.54
0.00
37.00
3.52
0.54
0.00
38.00
3.52
0.54
0.00
39.00
3.52
0.54
0.00
40.00
3.52
0.54
0.00
41.00
3.52
0.54
0.00
42.00
3.52
0.54
0.00
43.00
3.52
0.54
0.00
44.00
3.52
0.54
0.00
45.00
3.52
0.54
0.00
46.00
3.52
0.54
0.00
47.00
3.52
0.54
0.00
48.00
3.52
0.54
0.00
49.00
3.52
0.54
0.00
50.00
3.52
0.54
0.00
51.00
3.52
0.54
0.00
52.00
3.52
0.54
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.52
0.54
0.00
54.00
3.52
0.54
0.00
55.00
3.52
0.54
0.00
56.00
3.52
0.54
0.00
57.00
3.52
0.54
0.00
58.00
3.52
0.54
0.00
59.00
3.52
0.54
0.00
60.00
3.52
0.54
0.00
61.00
3.52
0.54
0.00
62.00
3.52
0.54
0.00
63.00
3.52
0.54
0.00
64.00
3.52
0.54
0.00
65.00
3.52
0.54
0.00
66.00
3.52
0.54
0.00
67.00
3.52
0.54
0.00
68.00
3.52
0.54
0.00
69.00
3.52
0.54
0.00
70.00
3.52
0.54
0.00
71.00
3.52
0.54
0.00
72.00
3.52
0.54
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 57
Summary for Subcatchment 3S: Pre #3
Runoff = 2.96 cfs @ 12.26 hrs, Volume= 0.497 af, Depth= 0.35"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 2 Year Rainfall=3.52"
Area (ac) CN Description
11.470 55 Woods, Good, HSG B
5.439 56 Brush, Fair, HSG B
16.909 55 Weighted Average
16.909 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
23.6 Direct Entry,
Subcatchment 3S: Pre #3
Hydrograph
Ilili �i III
2.96 cfs
3 IIIIIIIIIIIIIIIIIII
T�I�� II 14-hrs
*zir IRainta4=3.52'�
III Rdnbff IAlrear=116.909 ad
3 l III I I I 1 I I �unp7jZpth=9.�F0
I I .�m�
1 III II�IIIIIIIIIIIIIIIIIIIIIIIII
III �I��IIIIIIIIIIIIIII'�I
li III�IIIII�IIIII�II
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
❑ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 58
Hydrograph for Subcatchment 3S: Pre #3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.04
0.00
0.00
2.00
0.08
0.00
0.00
3.00
0.12
0.00
0.00
4.00
0.17
0.00
0.00
5.00
0.22
0.00
0.00
6.00
0.28
0.00
0.00
7.00
0.35
0.00
0.00
8.00
0.42
0.00
0.00
9.00
0.52
0.00
0.00
10.00
0.64
0.00
0.00
11.00
0.83
0.00
0.00
12.00
2.33
0.05
0.35
13.00
2.72
0.13
1.04
14.00
2.89
0.17
0.64
15.00
3.00
0.20
0.51
16.00
3.10
0.22
0.42
17.00
3.17
0.24
0.37
18.00
3.24
0.26
0.34
19.00
3.30
0.28
0.30
20.00
3.35
0.30
0.26
21.00
3.40
0.31
0.24
22.00
3.44
0.33
0.24
23.00
3.48
0.34
0.23
24.00
3.52
0.35
0.23
25.00
3.52
0.35
0.00
26.00
3.52
0.35
0.00
27.00
3.52
0.35
0.00
28.00
3.52
0.35
0.00
29.00
3.52
0.35
0.00
30.00
3.52
0.35
0.00
31.00
3.52
0.35
0.00
32.00
3.52
0.35
0.00
33.00
3.52
0.35
0.00
34.00
3.52
0.35
0.00
35.00
3.52
0.35
0.00
36.00
3.52
0.35
0.00
37.00
3.52
0.35
0.00
38.00
3.52
0.35
0.00
39.00
3.52
0.35
0.00
40.00
3.52
0.35
0.00
41.00
3.52
0.35
0.00
42.00
3.52
0.35
0.00
43.00
3.52
0.35
0.00
44.00
3.52
0.35
0.00
45.00
3.52
0.35
0.00
46.00
3.52
0.35
0.00
47.00
3.52
0.35
0.00
48.00
3.52
0.35
0.00
49.00
3.52
0.35
0.00
50.00
3.52
0.35
0.00
51.00
3.52
0.35
0.00
52.00
3.52
0.35
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.52
0.35
0.00
54.00
3.52
0.35
0.00
55.00
3.52
0.35
0.00
56.00
3.52
0.35
0.00
57.00
3.52
0.35
0.00
58.00
3.52
0.35
0.00
59.00
3.52
0.35
0.00
60.00
3.52
0.35
0.00
61.00
3.52
0.35
0.00
62.00
3.52
0.35
0.00
63.00
3.52
0.35
0.00
64.00
3.52
0.35
0.00
65.00
3.52
0.35
0.00
66.00
3.52
0.35
0.00
67.00
3.52
0.35
0.00
68.00
3.52
0.35
0.00
69.00
3.52
0.35
0.00
70.00
3.52
0.35
0.00
71.00
3.52
0.35
0.00
72.00
3.52
0.35
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 59
Summary for Subcatchment 5S: By -Pass #2
Runoff = 5.42 cfs @ 12.22 hrs, Volume= 0.639 af, Depth= 0.54"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 2 Year Rainfall=3.52"
Area (ac) CN Description
11.999 58 Woods/grass comb., Good, HSG B
2.200 73 Brush, Good, HSG D
14.199 60 Weighted Average
14.199 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
23.1 Direct Entry,
Subcatchment 5S: By -Pass #2
Hydrograph
i- I-1 Irt Irt i i I II Irt Irt Irt I rtl fil
5.42 cfs
I I I I ���III �4-hrs
5 1 1 I I I I I I I I I I I I� `��alr IRa�nlf�lll=�i.52'�
III III l RUnloff iAr6al=14.1199 ad
4
P�uq�l�����o f Vm 0 6
II�IIIIIIIII�iolu�9 pf
tin f,Bepth- .
0 3 IIII I�I
LL Tc=23. min
IIIIIIIIIIIIIII ���L�
2 I II IIIIIIIIIIIIIIIIIIIIII�
�I fil rI rI r II Irt Irt Irt TI
1 1 1 1 1 1 .1 62 64 66 68 iO
❑ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 60
Hydrograph for Subcatchment 5S: By -Pass #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.04
0.00
0.00
2.00
0.08
0.00
0.00
3.00
0.12
0.00
0.00
4.00
0.17
0.00
0.00
5.00
0.22
0.00
0.00
6.00
0.28
0.00
0.00
7.00
0.35
0.00
0.00
8.00
0.42
0.00
0.00
9.00
0.52
0.00
0.00
10.00
0.64
0.00
0.00
11.00
0.83
0.00
0.00
12.00
2.33
0.13
1.32
13.00
2.72
0.24
1.28
14.00
2.89
0.29
0.75
15.00
3.00
0.33
0.58
16.00
3.10
0.37
0.48
17.00
3.17
0.40
0.41
18.00
3.24
0.42
0.37
19.00
3.30
0.45
0.33
20.00
3.35
0.47
0.29
21.00
3.40
0.49
0.26
22.00
3.44
0.51
0.26
23.00
3.48
0.52
0.25
24.00
3.52
0.54
0.24
25.00
3.52
0.54
0.00
26.00
3.52
0.54
0.00
27.00
3.52
0.54
0.00
28.00
3.52
0.54
0.00
29.00
3.52
0.54
0.00
30.00
3.52
0.54
0.00
31.00
3.52
0.54
0.00
32.00
3.52
0.54
0.00
33.00
3.52
0.54
0.00
34.00
3.52
0.54
0.00
35.00
3.52
0.54
0.00
36.00
3.52
0.54
0.00
37.00
3.52
0.54
0.00
38.00
3.52
0.54
0.00
39.00
3.52
0.54
0.00
40.00
3.52
0.54
0.00
41.00
3.52
0.54
0.00
42.00
3.52
0.54
0.00
43.00
3.52
0.54
0.00
44.00
3.52
0.54
0.00
45.00
3.52
0.54
0.00
46.00
3.52
0.54
0.00
47.00
3.52
0.54
0.00
48.00
3.52
0.54
0.00
49.00
3.52
0.54
0.00
50.00
3.52
0.54
0.00
51.00
3.52
0.54
0.00
52.00
3.52
0.54
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.52
0.54
0.00
54.00
3.52
0.54
0.00
55.00
3.52
0.54
0.00
56.00
3.52
0.54
0.00
57.00
3.52
0.54
0.00
58.00
3.52
0.54
0.00
59.00
3.52
0.54
0.00
60.00
3.52
0.54
0.00
61.00
3.52
0.54
0.00
62.00
3.52
0.54
0.00
63.00
3.52
0.54
0.00
64.00
3.52
0.54
0.00
65.00
3.52
0.54
0.00
66.00
3.52
0.54
0.00
67.00
3.52
0.54
0.00
68.00
3.52
0.54
0.00
69.00
3.52
0.54
0.00
70.00
3.52
0.54
0.00
71.00
3.52
0.54
0.00
72.00
3.52
0.54
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 61
Summary for Subcatchment 6S: By -Pass #1
Runoff = 2.76 cfs @ 12.16 hrs, Volume= 0.293 af, Depth= 0.50"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 2 Year Rainfall=3.52"
Area (ac) CN Description
6.540 58 Woods/grass comb., Good, HSG B
0.500 73 Brush, Good, HSG D
7.040 59 Weighted Average
7.040 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
18.5 Direct Entry,
Subcatchment 6S: By -Pass #1
Hydrograph
3
2.76 cfs Typ� III 24-hrs
`i air Rainfall=3.52'�
I I I I _L I LI LI IRuhbff-Attar-7.040 ad
2
,IIIIIIIIIIIII �u,n�7,Depth=PI.,59LLTc=18.5 min
III IIIlllllllllllllll t"N.=
1 � IIIIIIIIIIIIIIII it
'Illlllllllllll�I
.....................................
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 66 68 60 62 64 66 68 70 72
Time (hours)
❑ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 62
Hydrograph for Subcatchment 6S: By -Pass #1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.04
0.00
0.00
2.00
0.08
0.00
0.00
3.00
0.12
0.00
0.00
4.00
0.17
0.00
0.00
5.00
0.22
0.00
0.00
6.00
0.28
0.00
0.00
7.00
0.35
0.00
0.00
8.00
0.42
0.00
0.00
9.00
0.52
0.00
0.00
10.00
0.64
0.00
0.00
11.00
0.83
0.00
0.00
12.00
2.33
0.11
0.97
13.00
2.72
0.21
0.55
14.00
2.89
0.27
0.34
15.00
3.00
0.30
0.27
16.00
3.10
0.34
0.22
17.00
3.17
0.36
0.19
18.00
3.24
0.39
0.17
19.00
3.30
0.41
0.16
20.00
3.35
0.43
0.13
21.00
3.40
0.45
0.13
22.00
3.44
0.47
0.12
23.00
3.48
0.48
0.12
24.00
3.52
0.50
0.11
25.00
3.52
0.50
0.00
26.00
3.52
0.50
0.00
27.00
3.52
0.50
0.00
28.00
3.52
0.50
0.00
29.00
3.52
0.50
0.00
30.00
3.52
0.50
0.00
31.00
3.52
0.50
0.00
32.00
3.52
0.50
0.00
33.00
3.52
0.50
0.00
34.00
3.52
0.50
0.00
35.00
3.52
0.50
0.00
36.00
3.52
0.50
0.00
37.00
3.52
0.50
0.00
38.00
3.52
0.50
0.00
39.00
3.52
0.50
0.00
40.00
3.52
0.50
0.00
41.00
3.52
0.50
0.00
42.00
3.52
0.50
0.00
43.00
3.52
0.50
0.00
44.00
3.52
0.50
0.00
45.00
3.52
0.50
0.00
46.00
3.52
0.50
0.00
47.00
3.52
0.50
0.00
48.00
3.52
0.50
0.00
49.00
3.52
0.50
0.00
50.00
3.52
0.50
0.00
51.00
3.52
0.50
0.00
52.00
3.52
0.50
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.52
0.50
0.00
54.00
3.52
0.50
0.00
55.00
3.52
0.50
0.00
56.00
3.52
0.50
0.00
57.00
3.52
0.50
0.00
58.00
3.52
0.50
0.00
59.00
3.52
0.50
0.00
60.00
3.52
0.50
0.00
61.00
3.52
0.50
0.00
62.00
3.52
0.50
0.00
63.00
3.52
0.50
0.00
64.00
3.52
0.50
0.00
65.00
3.52
0.50
0.00
66.00
3.52
0.50
0.00
67.00
3.52
0.50
0.00
68.00
3.52
0.50
0.00
69.00
3.52
0.50
0.00
70.00
3.52
0.50
0.00
71.00
3.52
0.50
0.00
72.00
3.52
0.50
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 63
Summary for Subcatchment POI#2: Post -Development POI#2
Runoff = 1.18 cfs @ 12.13 hrs, Volume= 0.098 af, Depth= 0.76"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 2 Year Rainfall=3.52"
Area (ac) CN Description
1.540 65 Woods/grass comb., Fair, HSG B
1.540 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
17.6 Direct Entry,
Subcatchment POI#2: Post -Development POW
Hydrograph
II IIII� it
1.18 cfs
1
IRluhbff Area0l.540 ad
l l l l RunolfflV(oilume=0.098 �#
Runoff De h=0.7 "
��.1mn ,L C l
�� iIiIIIIIIIIIIIIIIII��IL��
��������IIIIIIIIIIIIIIIIIIIII
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
❑ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 64
Hydrograph for Subcatchment POI#2: Post -Development POI#2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.04
0.00
0.00
2.00
0.08
0.00
0.00
3.00
0.12
0.00
0.00
4.00
0.17
0.00
0.00
5.00
0.22
0.00
0.00
6.00
0.28
0.00
0.00
7.00
0.35
0.00
0.00
8.00
0.42
0.00
0.00
9.00
0.52
0.00
0.00
10.00
0.64
0.00
0.00
11.00
0.83
0.00
0.00
12.00
2.33
0.24
0.66
13.00
2.72
0.38
0.17
14.00
2.89
0.46
0.10
15.00
3.00
0.51
0.08
16.00
3.10
0.55
0.06
17.00
3.17
0.59
0.06
18.00
3.24
0.62
0.05
19.00
3.30
0.65
0.04
20.00
3.35
0.68
0.04
21.00
3.40
0.70
0.04
22.00
3.44
0.72
0.03
23.00
3.48
0.74
0.03
24.00
3.52
0.76
0.03
25.00
3.52
0.76
0.00
26.00
3.52
0.76
0.00
27.00
3.52
0.76
0.00
28.00
3.52
0.76
0.00
29.00
3.52
0.76
0.00
30.00
3.52
0.76
0.00
31.00
3.52
0.76
0.00
32.00
3.52
0.76
0.00
33.00
3.52
0.76
0.00
34.00
3.52
0.76
0.00
35.00
3.52
0.76
0.00
36.00
3.52
0.76
0.00
37.00
3.52
0.76
0.00
38.00
3.52
0.76
0.00
39.00
3.52
0.76
0.00
40.00
3.52
0.76
0.00
41.00
3.52
0.76
0.00
42.00
3.52
0.76
0.00
43.00
3.52
0.76
0.00
44.00
3.52
0.76
0.00
45.00
3.52
0.76
0.00
46.00
3.52
0.76
0.00
47.00
3.52
0.76
0.00
48.00
3.52
0.76
0.00
49.00
3.52
0.76
0.00
50.00
3.52
0.76
0.00
51.00
3.52
0.76
0.00
52.00
3.52
0.76
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.52
0.76
0.00
54.00
3.52
0.76
0.00
55.00
3.52
0.76
0.00
56.00
3.52
0.76
0.00
57.00
3.52
0.76
0.00
58.00
3.52
0.76
0.00
59.00
3.52
0.76
0.00
60.00
3.52
0.76
0.00
61.00
3.52
0.76
0.00
62.00
3.52
0.76
0.00
63.00
3.52
0.76
0.00
64.00
3.52
0.76
0.00
65.00
3.52
0.76
0.00
66.00
3.52
0.76
0.00
67.00
3.52
0.76
0.00
68.00
3.52
0.76
0.00
69.00
3.52
0.76
0.00
70.00
3.52
0.76
0.00
71.00
3.52
0.76
0.00
72.00
3.52
0.76
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 65
Summary for Subcatchment P0I#3: Post -Development P0I#3
Runoff = 4.64 cfs @ 12.09 hrs, Volume= 0.333 af, Depth= 0.86"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 2 Year Rainfall=3.52"
Area (ac) CN Description
4.318 65 Woods/grass comb., Fair, HSG B
0.317 98 Paved parking, HSG B
4.635 67 Weighted Average
4.318 93.16% Pervious Area
0.317 6.84% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
14.9 Direct Entry,
Subcatchment P0I#3: Post -Development P0I#3
Hydrograph
4-- —4 + fi
5 4.64 cfs
4 I� I + H HI �2 l-ea rtRa44al 11= ,Ike
III IMMH IRlunoff JAtd&4.635 ad
v 3
I� I rt rt IT l fi l fit
3 I
1 I I I I I I I �uln� j1Deph7 .P8
Tc= 4. m i n
2-
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 66
Hydrograph for Subcatchment POI#3: Post -Development POI#3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.04
0.00
0.00
2.00
0.08
0.00
0.00
3.00
0.12
0.00
0.00
4.00
0.17
0.00
0.00
5.00
0.22
0.00
0.00
6.00
0.28
0.00
0.00
7.00
0.35
0.00
0.00
8.00
0.42
0.00
0.00
9.00
0.52
0.00
0.00
10.00
0.64
0.00
0.00
11.00
0.83
0.00
0.00
12.00
2.33
0.29
3.32
13.00
2.72
0.45
0.53
14.00
2.89
0.53
0.32
15.00
3.00
0.59
0.26
16.00
3.10
0.63
0.21
17.00
3.17
0.67
0.18
18.00
3.24
0.71
0.16
19.00
3.30
0.74
0.14
20.00
3.35
0.77
0.12
21.00
3.40
0.79
0.11
22.00
3.44
0.82
0.11
23.00
3.48
0.84
0.11
24.00
3.52
0.86
0.10
25.00
3.52
0.86
0.00
26.00
3.52
0.86
0.00
27.00
3.52
0.86
0.00
28.00
3.52
0.86
0.00
29.00
3.52
0.86
0.00
30.00
3.52
0.86
0.00
31.00
3.52
0.86
0.00
32.00
3.52
0.86
0.00
33.00
3.52
0.86
0.00
34.00
3.52
0.86
0.00
35.00
3.52
0.86
0.00
36.00
3.52
0.86
0.00
37.00
3.52
0.86
0.00
38.00
3.52
0.86
0.00
39.00
3.52
0.86
0.00
40.00
3.52
0.86
0.00
41.00
3.52
0.86
0.00
42.00
3.52
0.86
0.00
43.00
3.52
0.86
0.00
44.00
3.52
0.86
0.00
45.00
3.52
0.86
0.00
46.00
3.52
0.86
0.00
47.00
3.52
0.86
0.00
48.00
3.52
0.86
0.00
49.00
3.52
0.86
0.00
50.00
3.52
0.86
0.00
51.00
3.52
0.86
0.00
52.00
3.52
0.86
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.52
0.86
0.00
54.00
3.52
0.86
0.00
55.00
3.52
0.86
0.00
56.00
3.52
0.86
0.00
57.00
3.52
0.86
0.00
58.00
3.52
0.86
0.00
59.00
3.52
0.86
0.00
60.00
3.52
0.86
0.00
61.00
3.52
0.86
0.00
62.00
3.52
0.86
0.00
63.00
3.52
0.86
0.00
64.00
3.52
0.86
0.00
65.00
3.52
0.86
0.00
66.00
3.52
0.86
0.00
67.00
3.52
0.86
0.00
68.00
3.52
0.86
0.00
69.00
3.52
0.86
0.00
70.00
3.52
0.86
0.00
71.00
3.52
0.86
0.00
72.00
3.52
0.86
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 67
Summary for Subcatchment P0I#4: Post -Development P0I#4
Runoff = 1.39 cfs @ 12.22 hrs, Volume= 0.137 af, Depth= 0.91"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 2 Year Rainfall=3.52"
Area (ac) CN Description
1.460 61 >75% Grass cover, Good, HSG B
0.336 98 Paved parking, HSG B
1.796 68 Weighted Average
1.460 81.29% Pervious Area
0.336 18.71 % Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
25.5 Direct Entry,
Subcatchment P0I#4: Post -Development P0I#4
Hydrograph
I I I I I I 1
1.39 cfs
II III III
1
v I III IIIIII
3
0
I III IIIIII
�I IIIIII
IIIIII
Ill 2 Year IRainta4=3.15$'V
LI RunofflAhdaO_1.1796 ad
III P�ggoffIyolyma70�1P7 of
IIIIII �uln�J,Deph�-
Tc=S. min
IIIIIIIIIIIIII��L��
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
❑ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 68
Hydrograph for Subcatchment POI#4: Post -Development POI#4
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.04
0.00
0.00
2.00
0.08
0.00
0.00
3.00
0.12
0.00
0.00
4.00
0.17
0.00
0.00
5.00
0.22
0.00
0.00
6.00
0.28
0.00
0.00
7.00
0.35
0.00
0.00
8.00
0.42
0.00
0.00
9.00
0.52
0.00
0.00
10.00
0.64
0.00
0.00
11.00
0.83
0.00
0.00
12.00
2.33
0.32
0.51
13.00
2.72
0.49
0.27
14.00
2.89
0.57
0.14
15.00
3.00
0.63
0.11
16.00
3.10
0.68
0.09
17.00
3.17
0.72
0.07
18.00
3.24
0.76
0.07
19.00
3.30
0.79
0.06
20.00
3.35
0.82
0.05
21.00
3.40
0.84
0.05
22.00
3.44
0.87
0.04
23.00
3.48
0.89
0.04
24.00
3.52
0.91
0.04
25.00
3.52
0.91
0.00
26.00
3.52
0.91
0.00
27.00
3.52
0.91
0.00
28.00
3.52
0.91
0.00
29.00
3.52
0.91
0.00
30.00
3.52
0.91
0.00
31.00
3.52
0.91
0.00
32.00
3.52
0.91
0.00
33.00
3.52
0.91
0.00
34.00
3.52
0.91
0.00
35.00
3.52
0.91
0.00
36.00
3.52
0.91
0.00
37.00
3.52
0.91
0.00
38.00
3.52
0.91
0.00
39.00
3.52
0.91
0.00
40.00
3.52
0.91
0.00
41.00
3.52
0.91
0.00
42.00
3.52
0.91
0.00
43.00
3.52
0.91
0.00
44.00
3.52
0.91
0.00
45.00
3.52
0.91
0.00
46.00
3.52
0.91
0.00
47.00
3.52
0.91
0.00
48.00
3.52
0.91
0.00
49.00
3.52
0.91
0.00
50.00
3.52
0.91
0.00
51.00
3.52
0.91
0.00
52.00
3.52
0.91
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.52
0.91
0.00
54.00
3.52
0.91
0.00
55.00
3.52
0.91
0.00
56.00
3.52
0.91
0.00
57.00
3.52
0.91
0.00
58.00
3.52
0.91
0.00
59.00
3.52
0.91
0.00
60.00
3.52
0.91
0.00
61.00
3.52
0.91
0.00
62.00
3.52
0.91
0.00
63.00
3.52
0.91
0.00
64.00
3.52
0.91
0.00
65.00
3.52
0.91
0.00
66.00
3.52
0.91
0.00
67.00
3.52
0.91
0.00
68.00
3.52
0.91
0.00
69.00
3.52
0.91
0.00
70.00
3.52
0.91
0.00
71.00
3.52
0.91
0.00
72.00
3.52
0.91
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 69
Summary for Subcatchment POND#1: Post -Development Pond#1
Runoff = 10.79 cfs @ 12.23 hrs, Volume= 1.115 af, Depth= 0.81"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 2 Year Rainfall=3.52"
Area (ac) CN Description
0.670
98
Paved parking, HSG B
12.602
58
Woods/grass comb., Good, HSG B
1.894
98
Roofs, HSG A
0.504
98
Water Surface, HSG B
0.830
61
>75% Grass cover, Good, HSG B
16.500
66
Weighted Average
13.432
81.41 % Pervious Area
3.068
18.59% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
25.7 Direct Entry,
Subcatchment POND#1: Post -Development Pond#1
Hydrograph
12
17 —1
T—i 1 1 1-1 —1 I 1-T 1 T I T 1
Runoff
cfs
11
j 10.79
10
1 I _L 1 L 1 -L I LI LI L� *�,-ir RIainlf- 4-1 ,l 'f
9
14 1 1 1 Rd f 1Ar6A=16.500 -Jd
8
'
rt Irt rt �I fil°I1�����t�l��
°
" 5
1 1-LI_LILILI LI LI LI L 1—t 1-i 1-i�+ L�
V��VV
4
141+1+1-1-I H H H 1--1 14 14 14 1
3
1 1 1
Irt I t I t I fit fit t-I t__I N I- � Irt Irt It I t l
2
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34,36 38 40 42 44 46 48 50 1. 52 54 56 58 60 62 1. 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 70
Hydrograph for Subcatchment POND#1: Post -Development Pond#1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.04
0.00
0.00
2.00
0.08
0.00
0.00
3.00
0.12
0.00
0.00
4.00
0.17
0.00
0.00
5.00
0.22
0.00
0.00
6.00
0.28
0.00
0.00
7.00
0.35
0.00
0.00
8.00
0.42
0.00
0.00
9.00
0.52
0.00
0.00
10.00
0.64
0.00
0.00
11.00
0.83
0.00
0.00
12.00
2.33
0.26
3.49
13.00
2.72
0.42
2.25
14.00
2.89
0.49
1.19
15.00
3.00
0.55
0.90
16.00
3.10
0.59
0.73
17.00
3.17
0.63
0.63
18.00
3.24
0.66
0.56
19.00
3.30
0.69
0.50
20.00
3.35
0.72
0.43
21.00
3.40
0.74
0.39
22.00
3.44
0.77
0.38
23.00
3.48
0.79
0.37
24.00
3.52
0.81
0.36
25.00
3.52
0.81
0.00
26.00
3.52
0.81
0.00
27.00
3.52
0.81
0.00
28.00
3.52
0.81
0.00
29.00
3.52
0.81
0.00
30.00
3.52
0.81
0.00
31.00
3.52
0.81
0.00
32.00
3.52
0.81
0.00
33.00
3.52
0.81
0.00
34.00
3.52
0.81
0.00
35.00
3.52
0.81
0.00
36.00
3.52
0.81
0.00
37.00
3.52
0.81
0.00
38.00
3.52
0.81
0.00
39.00
3.52
0.81
0.00
40.00
3.52
0.81
0.00
41.00
3.52
0.81
0.00
42.00
3.52
0.81
0.00
43.00
3.52
0.81
0.00
44.00
3.52
0.81
0.00
45.00
3.52
0.81
0.00
46.00
3.52
0.81
0.00
47.00
3.52
0.81
0.00
48.00
3.52
0.81
0.00
49.00
3.52
0.81
0.00
50.00
3.52
0.81
0.00
51.00
3.52
0.81
0.00
52.00
3.52
0.81
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.52
0.81
0.00
54.00
3.52
0.81
0.00
55.00
3.52
0.81
0.00
56.00
3.52
0.81
0.00
57.00
3.52
0.81
0.00
58.00
3.52
0.81
0.00
59.00
3.52
0.81
0.00
60.00
3.52
0.81
0.00
61.00
3.52
0.81
0.00
62.00
3.52
0.81
0.00
63.00
3.52
0.81
0.00
64.00
3.52
0.81
0.00
65.00
3.52
0.81
0.00
66.00
3.52
0.81
0.00
67.00
3.52
0.81
0.00
68.00
3.52
0.81
0.00
69.00
3.52
0.81
0.00
70.00
3.52
0.81
0.00
71.00
3.52
0.81
0.00
72.00
3.52
0.81
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 71
Summary for Subcatchment POND#2: Post -Development Pond #2
Runoff = 8.00 cfs @ 12.04 hrs, Volume= 0.471 af, Depth= 1.08"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 2 Year Rainfall=3.52"
Area (ac) CN Description
0.246
98
Paved parking, HSG B
3.500
58
Woods/grass comb., Good, HSG B
0.220
79
Woods/grass comb., Good, HSG D
1.010
98
Roofs, HSG A
0.272
98
Water Surface, HSG A
5.248
71
Weighted Average
3.720
70.88% Pervious Area
1.528
29.12% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
11.0 Direct Entry,
Subcatchment POND#2: Post -Development Pond #2
Hydrograph
❑Runoff
cfs
8
8.00
I TO r 1 n ri C rt l
Type II i14i�
.11
H
t I t I t t I fit t_I 1_ *_�zir Ralnfall=�.15_'
7
+ I+ I+ i- I-�- I H H IRu h-bff-A�*a�=5.Z48 Ad
6
4 4 1+ 14 I C I �A �R49 4YO mee t4+ 1 �f
w 5
19
Th7l4
c1.0 min
- I 111 L L I LI LI L Lt -i I L I I
��
3
V_�L
IIIIIIIIIIIIIIIIIIIIIIIIIIIII
2
IIIIIIIIIIIIII
1
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 72
Hydrograph for Subcatchment POND#2: Post -Development Pond #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.04
0.00
0.00
2.00
0.08
0.00
0.00
3.00
0.12
0.00
0.00
4.00
0.17
0.00
0.00
5.00
0.22
0.00
0.00
6.00
0.28
0.00
0.00
7.00
0.35
0.00
0.00
8.00
0.42
0.00
0.00
9.00
0.52
0.00
0.00
10.00
0.64
0.00
0.00
11.00
0.83
0.00
0.00
12.00
2.33
0.41
7.40
13.00
2.72
0.60
0.69
14.00
2.89
0.70
0.42
15.00
3.00
0.76
0.33
16.00
3.10
0.82
0.26
17.00
3.17
0.86
0.23
18.00
3.24
0.90
0.21
19.00
3.30
0.94
0.18
20.00
3.35
0.97
0.15
21.00
3.40
1.00
0.15
22.00
3.44
1.03
0.14
23.00
3.48
1.05
0.14
24.00
3.52
1.08
0.13
25.00
3.52
1.08
0.00
26.00
3.52
1.08
0.00
27.00
3.52
1.08
0.00
28.00
3.52
1.08
0.00
29.00
3.52
1.08
0.00
30.00
3.52
1.08
0.00
31.00
3.52
1.08
0.00
32.00
3.52
1.08
0.00
33.00
3.52
1.08
0.00
34.00
3.52
1.08
0.00
35.00
3.52
1.08
0.00
36.00
3.52
1.08
0.00
37.00
3.52
1.08
0.00
38.00
3.52
1.08
0.00
39.00
3.52
1.08
0.00
40.00
3.52
1.08
0.00
41.00
3.52
1.08
0.00
42.00
3.52
1.08
0.00
43.00
3.52
1.08
0.00
44.00
3.52
1.08
0.00
45.00
3.52
1.08
0.00
46.00
3.52
1.08
0.00
47.00
3.52
1.08
0.00
48.00
3.52
1.08
0.00
49.00
3.52
1.08
0.00
50.00
3.52
1.08
0.00
51.00
3.52
1.08
0.00
52.00
3.52
1.08
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.52
1.08
0.00
54.00
3.52
1.08
0.00
55.00
3.52
1.08
0.00
56.00
3.52
1.08
0.00
57.00
3.52
1.08
0.00
58.00
3.52
1.08
0.00
59.00
3.52
1.08
0.00
60.00
3.52
1.08
0.00
61.00
3.52
1.08
0.00
62.00
3.52
1.08
0.00
63.00
3.52
1.08
0.00
64.00
3.52
1.08
0.00
65.00
3.52
1.08
0.00
66.00
3.52
1.08
0.00
67.00
3.52
1.08
0.00
68.00
3.52
1.08
0.00
69.00
3.52
1.08
0.00
70.00
3.52
1.08
0.00
71.00
3.52
1.08
0.00
72.00
3.52
1.08
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 73
Summary for Subcatchment PRE-POI#2: Pre -Development P0I#2
Runoff = 3.34 cfs @ 12.14 hrs, Volume= 0.283 af, Depth= 0.76"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 2 Year Rainfall=3.52"
Area (ac) CN Description
4.456 65 Woods/grass comb., Fair, HSG B
4.456 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.4 Direct Entry,
Subcatchment PRE-POI#2: Pre -Development P0I#2
Hydrograph
II II IIII� it
3.34cfs IIIIIIIIIIIIIIIIII
Ie I I1 -� r�
3 1 1 1 1 1 1 I I I `Y eir IRainta4=3.5$'�
III III I I IRluiI Area04.456 ad
3 2 1 1 1 �unl jjeph
LL 8
T = .4 min
C
III IIIIIIIIIIIIIIIIIIIIIIII��L��
I� Irt I fil fil fit �I 1� � I� Irt Irt Irt I fit fil
III lllllliillllilllllllllll��l
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
p Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 74
Hydrograph for Subcatchment PRE-POI#2: Pre -Development POI#2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.04
0.00
0.00
2.00
0.08
0.00
0.00
3.00
0.12
0.00
0.00
4.00
0.17
0.00
0.00
5.00
0.22
0.00
0.00
6.00
0.28
0.00
0.00
7.00
0.35
0.00
0.00
8.00
0.42
0.00
0.00
9.00
0.52
0.00
0.00
10.00
0.64
0.00
0.00
11.00
0.83
0.00
0.00
12.00
2.33
0.24
1.75
13.00
2.72
0.38
0.49
14.00
2.89
0.46
0.29
15.00
3.00
0.51
0.23
16.00
3.10
0.55
0.18
17.00
3.17
0.59
0.16
18.00
3.24
0.62
0.14
19.00
3.30
0.65
0.13
20.00
3.35
0.68
0.11
21.00
3.40
0.70
0.10
22.00
3.44
0.72
0.10
23.00
3.48
0.74
0.10
24.00
3.52
0.76
0.09
25.00
3.52
0.76
0.00
26.00
3.52
0.76
0.00
27.00
3.52
0.76
0.00
28.00
3.52
0.76
0.00
29.00
3.52
0.76
0.00
30.00
3.52
0.76
0.00
31.00
3.52
0.76
0.00
32.00
3.52
0.76
0.00
33.00
3.52
0.76
0.00
34.00
3.52
0.76
0.00
35.00
3.52
0.76
0.00
36.00
3.52
0.76
0.00
37.00
3.52
0.76
0.00
38.00
3.52
0.76
0.00
39.00
3.52
0.76
0.00
40.00
3.52
0.76
0.00
41.00
3.52
0.76
0.00
42.00
3.52
0.76
0.00
43.00
3.52
0.76
0.00
44.00
3.52
0.76
0.00
45.00
3.52
0.76
0.00
46.00
3.52
0.76
0.00
47.00
3.52
0.76
0.00
48.00
3.52
0.76
0.00
49.00
3.52
0.76
0.00
50.00
3.52
0.76
0.00
51.00
3.52
0.76
0.00
52.00
3.52
0.76
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.52
0.76
0.00
54.00
3.52
0.76
0.00
55.00
3.52
0.76
0.00
56.00
3.52
0.76
0.00
57.00
3.52
0.76
0.00
58.00
3.52
0.76
0.00
59.00
3.52
0.76
0.00
60.00
3.52
0.76
0.00
61.00
3.52
0.76
0.00
62.00
3.52
0.76
0.00
63.00
3.52
0.76
0.00
64.00
3.52
0.76
0.00
65.00
3.52
0.76
0.00
66.00
3.52
0.76
0.00
67.00
3.52
0.76
0.00
68.00
3.52
0.76
0.00
69.00
3.52
0.76
0.00
70.00
3.52
0.76
0.00
71.00
3.52
0.76
0.00
72.00
3.52
0.76
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 75
Summary for Subcatchment PRE-POI#3: Pre -Development P0I#3
Runoff = 5.49 cfs @ 12.15 hrs, Volume= 0.479 af, Depth= 0.81"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 2 Year Rainfall=3.52"
Area (ac) CN
Description
6.950 65
Woods/grass comb., Fair, HSG B
0.137 98
Paved roads w/curbs & sewers, HSG B
7.087 66
Weighted Average
6.950
98.07% Pervious Area
0.137
1.93% Impervious Area
Tc Length
Slope Velocity Capacity Description
(min) (feet)
(ft/ft) (ft/sec) (cfs)
20.0
Direct Entry,
Subcatchment PRE-POI#3: Pre -Development P0I#3
Hydrograph
6 I+ 1 1 1 1 1 1 1 1 1 1 1 1 1 ❑Runoff
5.49cfs IIIIIIIIIIIIIIIIIII I
5 III IIIIIIIII 1 1 2 Year IRainta4=3.15$'�
T 14 1 J- I ITT Ru"ff-AtjdaO-7.0-87 Ad
4 IIIIIIIII III P�4gofflyollyrgp70}417P p#
0 3 T T I T T TI TI TI T�I
c= 0. min
2 I � I IIIIIIIIIIIIIIIIIIIIIII
T TTf__I T t_� 11 IT I TT + T
I� IIIIIIIII
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 76
Hydrograph for Subcatchment PRE-POI#3: Pre -Development POI#3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.04
0.00
0.00
2.00
0.08
0.00
0.00
3.00
0.12
0.00
0.00
4.00
0.17
0.00
0.00
5.00
0.22
0.00
0.00
6.00
0.28
0.00
0.00
7.00
0.35
0.00
0.00
8.00
0.42
0.00
0.00
9.00
0.52
0.00
0.00
10.00
0.64
0.00
0.00
11.00
0.83
0.00
0.00
12.00
2.33
0.26
2.67
13.00
2.72
0.42
0.84
14.00
2.89
0.49
0.49
15.00
3.00
0.55
0.38
16.00
3.10
0.59
0.31
17.00
3.17
0.63
0.27
18.00
3.24
0.66
0.24
19.00
3.30
0.69
0.21
20.00
3.35
0.72
0.18
21.00
3.40
0.74
0.17
22.00
3.44
0.77
0.16
23.00
3.48
0.79
0.16
24.00
3.52
0.81
0.15
25.00
3.52
0.81
0.00
26.00
3.52
0.81
0.00
27.00
3.52
0.81
0.00
28.00
3.52
0.81
0.00
29.00
3.52
0.81
0.00
30.00
3.52
0.81
0.00
31.00
3.52
0.81
0.00
32.00
3.52
0.81
0.00
33.00
3.52
0.81
0.00
34.00
3.52
0.81
0.00
35.00
3.52
0.81
0.00
36.00
3.52
0.81
0.00
37.00
3.52
0.81
0.00
38.00
3.52
0.81
0.00
39.00
3.52
0.81
0.00
40.00
3.52
0.81
0.00
41.00
3.52
0.81
0.00
42.00
3.52
0.81
0.00
43.00
3.52
0.81
0.00
44.00
3.52
0.81
0.00
45.00
3.52
0.81
0.00
46.00
3.52
0.81
0.00
47.00
3.52
0.81
0.00
48.00
3.52
0.81
0.00
49.00
3.52
0.81
0.00
50.00
3.52
0.81
0.00
51.00
3.52
0.81
0.00
52.00
3.52
0.81
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.52
0.81
0.00
54.00
3.52
0.81
0.00
55.00
3.52
0.81
0.00
56.00
3.52
0.81
0.00
57.00
3.52
0.81
0.00
58.00
3.52
0.81
0.00
59.00
3.52
0.81
0.00
60.00
3.52
0.81
0.00
61.00
3.52
0.81
0.00
62.00
3.52
0.81
0.00
63.00
3.52
0.81
0.00
64.00
3.52
0.81
0.00
65.00
3.52
0.81
0.00
66.00
3.52
0.81
0.00
67.00
3.52
0.81
0.00
68.00
3.52
0.81
0.00
69.00
3.52
0.81
0.00
70.00
3.52
0.81
0.00
71.00
3.52
0.81
0.00
72.00
3.52
0.81
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 77
Summary for Subcatchment PRE-POI#4: Pre -Development P0I#4
Runoff = 2.46 cfs @ 12.10 hrs, Volume= 0.183 af, Depth= 0.86"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 2 Year Rainfall=3.52"
Area (ac) CN Description
2.410 65 Woods/grass comb., Fair, HSG B
0.135 98 Paved parking, HSG B
2.545 67 Weighted Average
2.410 94.70% Pervious Area
0.135 5.30% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
15.9 Direct Entry,
Subcatchment PRE-POI#4: Pre -Development P0I#4
Hydrograph
I I 2.46 cfs
l l l l l l `Tr
2 III 1 1 1 1 1 1 IRluhbff JAM-d&2.545 ad
I I III I I I I I I I I��r�o�fflV�ol��r���o�183 ��
III IIII �uln�J,Dep�h=_
Tc=5. m i n
I II II II IIIIIIIIIII
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
❑ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 78
Hydrograph for Subcatchment PRE-POI#4: Pre -Development POI#4
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.04
0.00
0.00
2.00
0.08
0.00
0.00
3.00
0.12
0.00
0.00
4.00
0.17
0.00
0.00
5.00
0.22
0.00
0.00
6.00
0.28
0.00
0.00
7.00
0.35
0.00
0.00
8.00
0.42
0.00
0.00
9.00
0.52
0.00
0.00
10.00
0.64
0.00
0.00
11.00
0.83
0.00
0.00
12.00
2.33
0.29
1.64
13.00
2.72
0.45
0.30
14.00
2.89
0.53
0.18
15.00
3.00
0.59
0.14
16.00
3.10
0.63
0.11
17.00
3.17
0.67
0.10
18.00
3.24
0.71
0.09
19.00
3.30
0.74
0.08
20.00
3.35
0.77
0.07
21.00
3.40
0.79
0.06
22.00
3.44
0.82
0.06
23.00
3.48
0.84
0.06
24.00
3.52
0.86
0.06
25.00
3.52
0.86
0.00
26.00
3.52
0.86
0.00
27.00
3.52
0.86
0.00
28.00
3.52
0.86
0.00
29.00
3.52
0.86
0.00
30.00
3.52
0.86
0.00
31.00
3.52
0.86
0.00
32.00
3.52
0.86
0.00
33.00
3.52
0.86
0.00
34.00
3.52
0.86
0.00
35.00
3.52
0.86
0.00
36.00
3.52
0.86
0.00
37.00
3.52
0.86
0.00
38.00
3.52
0.86
0.00
39.00
3.52
0.86
0.00
40.00
3.52
0.86
0.00
41.00
3.52
0.86
0.00
42.00
3.52
0.86
0.00
43.00
3.52
0.86
0.00
44.00
3.52
0.86
0.00
45.00
3.52
0.86
0.00
46.00
3.52
0.86
0.00
47.00
3.52
0.86
0.00
48.00
3.52
0.86
0.00
49.00
3.52
0.86
0.00
50.00
3.52
0.86
0.00
51.00
3.52
0.86
0.00
52.00
3.52
0.86
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.52
0.86
0.00
54.00
3.52
0.86
0.00
55.00
3.52
0.86
0.00
56.00
3.52
0.86
0.00
57.00
3.52
0.86
0.00
58.00
3.52
0.86
0.00
59.00
3.52
0.86
0.00
60.00
3.52
0.86
0.00
61.00
3.52
0.86
0.00
62.00
3.52
0.86
0.00
63.00
3.52
0.86
0.00
64.00
3.52
0.86
0.00
65.00
3.52
0.86
0.00
66.00
3.52
0.86
0.00
67.00
3.52
0.86
0.00
68.00
3.52
0.86
0.00
69.00
3.52
0.86
0.00
70.00
3.52
0.86
0.00
71.00
3.52
0.86
0.00
72.00
3.52
0.86
0.00

Weddington Acres HydroCAD Revised Layout Type 11 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 79
Summary for Pond DET POND-1: Detention Pond #1
Inflow Area = 16.500 ac, 18.59% Impervious, Inflow Depth = 0.81" for 2 Year event
Inflow = 10.79 cfs @ 12.23 hrs, Volume= 1.115 of
Outflow = 0.84 cfs @ 15.37 hrs, Volume= 0.809 af, Atten= 92%, Lag= 188.8 min
Primary = 0.84 cfs @ 15.37 hrs, Volume= 0.809 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Peak Elev= 711.57' @ 15.37 hrs Surf.Area= 13,028 sf Storage= 28,272 cf
Plug -Flow detention time= 943.9 min calculated for 0.808 of (72% of inflow)
Center -of -Mass det. time= 833.9 min ( 1,732.0 - 898.1 )
Volume Invert Avail.Storage Storage Description
#1 708.00' 104,832 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
708.00 2,289 0 0
709.00 5,540 3,915 3,915
710.00 8,705 7,123 11,037
711.00 11,744 10,225 21,262
712.00 14,012 12,878 34,140
713.00 15,752 14,882 49,022
714.00 17,548 16,650 65,672
715.00 19,401 18,475 84,146
716.00 21,970 20,686 104,832
Device Routing Invert Outlet Devices
#1 Primary 707.00' 36.0" Round Culvert
L= 111.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 707.00' / 705.00' S= 0.0180 '/' Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 7.07 sf
#2 Device 1 708.00' 1.3" Vert. WQ C= 0.600
#3 Device 1 711.33' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 2.67
Width (feet) 2.00 2.00
#4 Device 1 714.00' 48.0" x 48.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 715.00' 18.0' long x 18.0' 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) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Primary OutFlow Max=0.83 cfs @ 15.37 hrs HW=711.57' (Free Discharge)
L1=Culvert (Passes 0.83 cfs of 59.60 cfs potential flow)
2=WQ (Orifice Controls 0.08 cfs @ 9.02 fps)
3=Custom Weir/Orifice (Weir Controls 0.75 cfs @ 1.59 fps)
4=Orifi ce/G rate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=708.00' (Free Discharge)
L5= Broad -Crested Rectangular Weir( Controls 0.00 cfs)

Weddington Acres HydroCAD Revised Layout
Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft
Printed 5/27/2020
HydroCAD® 10.00-15
s/n 08484 ©2015 HydroCAD Software Solutions LLC
Page 80
Pond DET POND-1:
Detention Pond #1
Hydrograph
TI T T
ITI
IT
TI T T IT T
❑Inflow
/
10.79
cfs
LI
infidw Aria 6.6001 ac
ow
°utflary
❑ Prim
12
/
❑ Se ondary
11
/
ITI
ITI
1�
I- t l
�
Peek EleVl=711.57'
10
/
i5
9
/
— —
8
/
1�
4
1�-I
H
14 IT1
H
ICI -1 14 1T1 HI 14
w 7
/
T
ITI
TI
IT ITI
T
ITI TI IT ITI TI IT
3 6-
0
LL
/
IT
ITI
�
u ITI
�
ITI �I I� I �I I� I
5
4
/
IT
_T
ITI
1�
1-t IfiI
ITI fit II ITI MI 1rt I
/
l l l l l
l l
l l l l l l l l l l l l l l l
2
0.84 cfs
716
715
714
m
713
m
0 712
m
w 711
710
709
708
0
///_1inn%//%////////////////////////////////////////////////////////////
Pond DET POND-1: Detention Pond #1
Stage -Discharge
20 40 60 80 100 120 140
Discharge (cfs)
❑ Total
❑ Primary
❑ Secondary

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 81
m
713
d
c 712
d
w 711
708 Q
0
Pond DET POND-1: Detention Pond #1
Stage -Area -Storage
Surface/HorizontaiMetted Area (sq-ft)
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000
40,000 50,000 60,000 70,000 80,000 90,000 100,000
Storage (cubic -feet)
Surface
❑ Storage

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 82
Hydrograph for Pond DET POND-1: Detention Pond #1
Time
Inflow
Storage
Elevation
Outflow
Primary
Secondary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
(cfs)
(cfs)
0.00
0.00
0
708.00
0.00
0.00
0.00
2.50
0.00
0
708.00
0.00
0.00
0.00
5.00
0.00
0
708.00
0.00
0.00
0.00
7.50
0.00
0
708.00
0.00
0.00
0.00
10.00
0.00
0
708.00
0.00
0.00
0.00
12.50
5.78
15,706
710.49
0.07
0.07
0.00
15.00
0.90
28,224
711.56
0.82
0.82
0.00
17.50
0.60
27,758
711.53
0.66
0.66
0.00
20.00
0.43
27,225
711.48
0.49
0.49
0.00
22.50
0.38
26,889
711.46
0.39
0.39
0.00
25.00
0.00
26,191
711.40
0.23
0.23
0.00
27.50
0.00
25,122
711.32
0.08
0.08
0.00
30.00
0.00
24,403
711.26
0.08
0.08
0.00
32.50
0.00
23,691
711.20
0.08
0.08
0.00
35.00
0.00
22,986
711.14
0.08
0.08
0.00
37.50
0.00
22,287
711.09
0.08
0.08
0.00
40.00
0.00
21,594
711.03
0.08
0.08
0.00
42.50
0.00
20,909
710.97
0.08
0.08
0.00
45.00
0.00
20,230
710.91
0.08
0.08
0.00
47.50
0.00
19,559
710.85
0.07
0.07
0.00
50.00
0.00
18,894
710.79
0.07
0.07
0.00
52.50
0.00
18,237
710.73
0.07
0.07
0.00
55.00
0.00
17,587
710.67
0.07
0.07
0.00
57.50
0.00
16,944
710.61
0.07
0.07
0.00
60.00
0.00
16,309
710.55
0.07
0.07
0.00
62.50
0.00
15,681
710.49
0.07
0.07
0.00
65.00
0.00
15,062
710.43
0.07
0.07
0.00
67.50
0.00
14,450
710.37
0.07
0.07
0.00
70.00
0.00
13,847
710.31
0.07
0.07
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 83
Stage -Discharge for Pond DET POND-1: Detention Pond #1
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
708.00
0.00
0.00
0.00
708.10
0.01
0.01
0.00
708.20
0.02
0.02
0.00
708.30
0.02
0.02
0.00
708.40
0.03
0.03
0.00
708.50
0.03
0.03
0.00
708.60
0.03
0.03
0.00
708.70
0.04
0.04
0.00
708.80
0.04
0.04
0.00
708.90
0.04
0.04
0.00
709.00
0.04
0.04
0.00
709.10
0.05
0.05
0.00
709.20
0.05
0.05
0.00
709.30
0.05
0.05
0.00
709.40
0.05
0.05
0.00
709.50
0.05
0.05
0.00
709.60
0.06
0.06
0.00
709.70
0.06
0.06
0.00
709.80
0.06
0.06
0.00
709.90
0.06
0.06
0.00
710.00
0.06
0.06
0.00
710.10
0.06
0.06
0.00
710.20
0.07
0.07
0.00
710.30
0.07
0.07
0.00
710.40
0.07
0.07
0.00
710.50
0.07
0.07
0.00
710.60
0.07
0.07
0.00
710.70
0.07
0.07
0.00
710.80
0.07
0.07
0.00
710.90
0.07
0.07
0.00
711.00
0.08
0.08
0.00
711.10
0.08
0.08
0.00
711.20
0.08
0.08
0.00
711.30
0.08
0.08
0.00
711.40
0.20
0.20
0.00
711.50
0.54
0.54
0.00
711.60
1.00
1.00
0.00
711.70
1.56
1.56
0.00
711.80
2.20
2.20
0.00
711.90
2.91
2.91
0.00
712.00
3.68
3.68
0.00
712.10
4.51
4.51
0.00
712.20
5.41
5.41
0.00
712.30
6.35
6.35
0.00
712.40
7.34
7.34
0.00
712.50
8.38
8.38
0.00
712.60
9.47
9.47
0.00
712.70
10.60
10.60
0.00
712.80
11.77
11.77
0.00
712.90
12.98
12.98
0.00
713.00
14.23
14.23
0.00
713.10
15.52
15.52
0.00
713.20
16.85
16.85
0.00
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
713.30
18.21
18.21
0.00
713.40
19.61
19.61
0.00
713.50
21.04
21.04
0.00
713.60
22.51
22.51
0.00
713.70
24.00
24.00
0.00
713.80
25.53
25.53
0.00
713.90
27.09
27.09
0.00
714.00
28.68
28.68
0.00
714.10
31.75
31.75
0.00
714.20
36.05
36.05
0.00
714.30
41.16
41.16
0.00
714.40
46.92
46.92
0.00
714.50
53.26
53.26
0.00
714.60
60.12
60.12
0.00
714.70
67.44
67.44
0.00
714.80
75.20
75.20
0.00
714.90
83.38
83.38
0.00
715.00
86.77
86.77
0.00
715.10
88.96
87.44
1.53
715.20
92.41
88.10
4.31
715.30
96.71
88.75
7.96
715.40
101.70
89.40
12.29
715.50
107.23
90.05
17.18
715.60
113.28
90.69
22.59
715.70
119.47
91.33
28.15
715.80
125.96
91.96
34.00
715.90
133.08
92.59
40.50
716.00
140.55
93.21
47.34

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 84
Stage -Area -Storage for Pond DET POND-1: Detention Pond #1
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
708.00
2,289
0
708.10
2,614
245
708.20
2,939
523
708.30
3,264
833
708.40
3,589
1,176
708.50
3,915
1,551
708.60
4,240
1,959
708.70
4,565
2,399
708.80
4,890
2,872
708.90
5,215
3,377
709.00
5,540
3,915
709.10
5,857
4,484
709.20
6,173
5,086
709.30
6,489
5,719
709.40
6,806
6,384
709.50
7,123
7,080
709.60
7,439
7,808
709.70
7,756
8,568
709.80
8,072
9,359
709.90
8,388
10,182
710.00
8,705
11,037
710.10
9,009
11,923
710.20
9,313
12,839
710.30
9,617
13,785
710.40
9,921
14,762
710.50
10,225
15,769
710.60
10,528
16,807
710.70
10,832
17,875
710.80
11,136
18,973
710.90
11,440
20,102
711.00
11,744
21,262
711.10
11,971
22,447
711.20
12,198
23,656
711.30
12,424
24,887
711.40
12,651
26,141
711.50
12,878
27,417
711.60
13,105
28,716
711.70
13,332
30,038
711.80
13,558
31,382
711.90
13,785
32,750
712.00
14,012
34,140
712.10
14,186
35,549
712.20
14,360
36,977
712.30
14,534
38,421
712.40
14,708
39,883
712.50
14,882
41,363
712.60
15,056
42,860
712.70
15,230
44,374
712.80
15,404
45,906
712.90
15,578
47,455
713.00
15,752
49,022
713.10
15,932
50,606
713.20
16,111
52,208
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
713.30
16,291
53,828
713.40
16,470
55,466
713.50
16,650
57,122
713.60
16,830
58,796
713.70
17,009
60,488
713.80
17,189
62,198
713.90
17,368
63,926
714.00
17,548
65,672
714.10
17,733
67,436
714.20
17,919
69,218
714.30
18,104
71,019
714.40
18,289
72,839
714.50
18,475
74,677
714.60
18,660
76,534
714.70
18,845
78,409
714.80
19,030
80,303
714.90
19,216
82,215
715.00
19,401
84,146
715.10
19,658
86,099
715.20
19,915
88,078
715.30
20,172
90,082
715.40
20,429
92,112
715.50
20,686
94,168
715.60
20,942
96,249
715.70
21,199
98,356
715.80
21,456
100,489
715.90
21,713
102,647
716.00
21,970
104,832

Weddington Acres HydroCAD Revised Layout Type 11 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 85
Summary for Pond DET POND-2: Detention Pond #2
Inflow Area = 5.248 ac, 29.12% Impervious, Inflow Depth = 1.08" for 2 Year event
Inflow = 8.00 cfs @ 12.04 hrs, Volume= 0.471 of
Outflow = 0.50 cfs @ 13.61 hrs, Volume= 0.453 af, Atten= 94%, Lag= 94.5 min
Primary = 0.50 cfs @ 13.61 hrs, Volume= 0.453 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Peak Elev= 698.98' @ 13.61 hrs Surf.Area= 6,956 sf Storage= 10,884 cf
Plug -Flow detention time= 934.4 min calculated for 0.453 of (96% of inflow)
Center -of -Mass det. time= 913.8 min ( 1,780.8 - 867.0 )
Volume Invert Avail.Storage Storage Description
#1 697.00' 49,496 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
697.00 3,325 0 0
698.00 5,881 4,603 4,603
699.00 6,979 6,430 11,033
700.00 8,219 7,599 18,632
701.00 9,671 8,945 27,577
702.00 11,155 10,413 37,990
703.00 11,857 11,506 49,496
Device Routing Invert Outlet Devices
#1 Primary 696.00' 24.0" Round RCP -Round 24"
L= 66.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 696.00' / 695.00' S= 0.0152 '/' Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 3.14 sf
#2 Device 1 697.00' 1.5" Vert. WQ C= 0.600
#3 Device 1 698.82' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 2.18
Width (feet) 2.00 2.00
#4 Device 1 701.00' 48.0" x 48.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 702.00' 10.0' 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=0.50 cfs @ 13.61 hrs HW=698.98' (Free Discharge)
L1=RCP_Round 24" (Passes 0.50 cfs of 21.28 cfs potential flow)
2=WQ (Orifice Controls 0.08 cfs @ 6.66 fps)
3=Custom Weir/Orifice (Weir Controls 0.41 cfs @ 1.30 fps)
4=Orifi ce/G rate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=697.00' (Free Discharge)
L5= Broad -Crested Rectangular Weir( Controls 0.00 cfs)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 86
Pond DET POND-2: Detention Pond #2
Hydrograph
8.00 cfs
�I
a
6
5
LL 4
3
2 /
0.50 cfs
LInflow
ndndary
I lPleAl 5164498.0W
StO 190:�%8G8i41Of
IIIIIIIIIIIIIIIII
1IIIIIIIIIIIIIIIIII
IIIIIIIIIIIIII
IIIIIIIIIIIIIII_,I
�WO0NZINWOZZOOi,I������//////1 i!wo
• 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 • 52 54 56 58 .0 62 64 66 68 70 72
Time (hours)
• • DET POND-2: Detention P• •
Stage -Discharge
■ Total
■ Primary
■ Secondary
0 5 10 15 20 25 30 35 40 45 50 55 60
Discharge (cfs)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 87
Pond DET POND-2: Detention Pond #2
Stage -Area -Storage
Surface/Horizontal/Wetted Area (sq-ft)
1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000
Storage (cubic -feet)
Surface
❑ Storage

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 88
Hydrograph for Pond DET POND-2: Detention Pond #2
Time
Inflow
Storage
Elevation
Outflow
Primary
Secondary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
(cfs)
(cfs)
0.00
0.00
0
697.00
0.00
0.00
0.00
2.50
0.00
0
697.00
0.00
0.00
0.00
5.00
0.00
0
697.00
0.00
0.00
0.00
7.50
0.00
0
697.00
0.00
0.00
0.00
10.00
0.00
0
697.00
0.00
0.00
0.00
12.50
1.19
9,399
698.76
0.08
0.08
0.00
15.00
0.33
10,649
698.94
0.38
0.38
0.00
17.50
0.22
10,356
698.90
0.24
0.24
0.00
20.00
0.15
10,179
698.88
0.17
0.17
0.00
22.50
0.14
10,097
698.86
0.14
0.14
0.00
25.00
0.00
9,773
698.82
0.08
0.08
0.00
27.50
0.00
9,080
698.71
0.08
0.08
0.00
30.00
0.00
8,407
698.61
0.07
0.07
0.00
32.50
0.00
7,756
698.51
0.07
0.07
0.00
35.00
0.00
7,127
698.41
0.07
0.07
0.00
37.50
0.00
6,520
698.32
0.07
0.07
0.00
40.00
0.00
5,936
698.22
0.06
0.06
0.00
42.50
0.00
5,375
698.13
0.06
0.06
0.00
45.00
0.00
4,837
698.04
0.06
0.06
0.00
47.50
0.00
4,324
697.95
0.06
0.06
0.00
50.00
0.00
3,835
697.87
0.05
0.05
0.00
52.50
0.00
3,371
697.78
0.05
0.05
0.00
55.00
0.00
2,934
697.70
0.05
0.05
0.00
57.50
0.00
2,525
697.61
0.04
0.04
0.00
60.00
0.00
2,145
697.53
0.04
0.04
0.00
62.50
0.00
1,795
697.46
0.04
0.04
0.00
65.00
0.00
1,476
697.39
0.03
0.03
0.00
67.50
0.00
1,190
697.32
0.03
0.03
0.00
70.00
0.00
939
697.26
0.03
0.03
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 89
Stage -Discharge for Pond DET POND-2: Detention Pond #2
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
697.00
0.00
0.00
0.00
697.10
0.01
0.01
0.00
697.20
0.02
0.02
0.00
697.30
0.03
0.03
0.00
697.40
0.03
0.03
0.00
697.50
0.04
0.04
0.00
697.60
0.04
0.04
0.00
697.70
0.05
0.05
0.00
697.80
0.05
0.05
0.00
697.90
0.05
0.05
0.00
698.00
0.06
0.06
0.00
698.10
0.06
0.06
0.00
698.20
0.06
0.06
0.00
698.30
0.07
0.07
0.00
698.40
0.07
0.07
0.00
698.50
0.07
0.07
0.00
698.60
0.07
0.07
0.00
698.70
0.08
0.08
0.00
698.80
0.08
0.08
0.00
698.90
0.23
0.23
0.00
699.00
0.58
0.58
0.00
699.10
1.05
1.05
0.00
699.20
1.62
1.62
0.00
699.30
2.27
2.27
0.00
699.40
2.98
2.98
0.00
699.50
3.77
3.77
0.00
699.60
4.61
4.61
0.00
699.70
5.50
5.50
0.00
699.80
6.45
6.45
0.00
699.90
7.45
7.45
0.00
700.00
8.50
8.50
0.00
700.10
9.59
9.59
0.00
700.20
10.72
10.72
0.00
700.30
11.90
11.90
0.00
700.40
13.12
13.12
0.00
700.50
14.37
14.37
0.00
700.60
15.67
15.67
0.00
700.70
17.00
17.00
0.00
700.80
18.36
18.36
0.00
700.90
19.76
19.76
0.00
701.00
21.20
21.20
0.00
701.10
24.12
24.12
0.00
701.20
28.26
28.26
0.00
701.30
31.37
31.37
0.00
701.40
31.73
31.73
0.00
701.50
32.09
32.09
0.00
701.60
32.44
32.44
0.00
701.70
32.79
32.79
0.00
701.80
33.14
33.14
0.00
701.90
33.48
33.48
0.00
702.00
33.82
33.82
0.00
702.10
34.95
34.16
0.79
702.20
36.72
34.49
2.23
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
702.30
38.97
34.82
4.15
702.40
41.63
35.15
6.48
702.50
44.77
35.48
9.30
702.60
48.34
35.80
12.55
702.70
51.90
36.11
15.78
702.80
55.68
36.43
19.25
702.90
59.67
36.74
22.92
703.00
63.85
37.05
26.80

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 90
Stage -Area -Storage for Pond DET POND-2: Detention Pond #2
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
697.00
3,325
0
697.10
3,581
345
697.20
3,836
716
697.30
4,092
1,113
697.40
4,347
1,534
697.50
4,603
1,982
697.60
4,859
2,455
697.70
5,114
2,954
697.80
5,370
3,478
697.90
5,625
4,028
698.00
5,881
4,603
698.10
5,991
5,197
698.20
6,101
5,801
698.30
6,210
6,417
698.40
6,320
7,043
698.50
6,430
7,681
698.60
6,540
8,329
698.70
6,650
8,989
698.80
6,759
9,659
698.90
6,869
10,341
699.00
6,979
11,033
699.10
7,103
11,737
699.20
7,227
12,454
699.30
7,351
13,182
699.40
7,475
13,924
699.50
7,599
14,678
699.60
7,723
15,444
699.70
7,847
16,222
699.80
7,971
17,013
699.90
8,095
17,816
700.00
8,219
18,632
700.10
8,364
19,461
700.20
8,509
20,305
700.30
8,655
21,163
700.40
8,800
22,036
700.50
8,945
22,923
700.60
9,090
23,825
700.70
9,235
24,741
700.80
9,381
25,672
700.90
9,526
26,617
701.00
9,671
27,577
701.10
9,819
28,552
701.20
9,968
29,541
701.30
10,116
30,545
701.40
10,265
31,564
701.50
10,413
32,598
701.60
10,561
33,647
701.70
10,710
34,710
701.80
10,858
35,789
701.90
11,007
36,882
702.00
11,155
37,990
702.10
11,225
39,109
702.20
11,295
40,235
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
702.30
11,366
41,368
702.40
11,436
42,508
702.50
11,506
43,655
702.60
11,576
44,809
702.70
11,646
45,970
702.80
11,717
47,139
702.90
11,787
48,314
703.00
11,857
49,496

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 91
Summary for Link 4L: Pre -Development POI
Inflow Area = 36.865 ac, 0.00% Impervious, Inflow Depth = 0.43" for 2 Year event
Inflow = 9.78 cfs @ 12.21 hrs, Volume= 1.332 of
Primary = 9.78 cfs @ 12.21 hrs, Volume= 1.332 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Link 4L: Pre -Development POI
Hydrograph
❑ Inflow
❑ Primary
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 92
Hydrograph for Link 4L: Pre -Development POI
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.00
0.00
0.00
2.00
0.00
0.00
0.00
3.00
0.00
0.00
0.00
4.00
0.00
0.00
0.00
5.00
0.00
0.00
0.00
6.00
0.00
0.00
0.00
7.00
0.00
0.00
0.00
8.00
0.00
0.00
0.00
9.00
0.00
0.00
0.00
10.00
0.00
0.00
0.00
11.00
0.00
0.00
0.00
12.00
2.27
0.00
2.27
13.00
2.68
0.00
2.68
14.00
1.62
0.00
1.62
15.00
1.28
0.00
1.28
16.00
1.05
0.00
1.05
17.00
0.92
0.00
0.92
18.00
0.84
0.00
0.84
19.00
0.74
0.00
0.74
20.00
0.64
0.00
0.64
21.00
0.60
0.00
0.60
22.00
0.59
0.00
0.59
23.00
0.57
0.00
0.57
24.00
0.55
0.00
0.55
25.00
0.00
0.00
0.00
26.00
0.00
0.00
0.00
27.00
0.00
0.00
0.00
28.00
0.00
0.00
0.00
29.00
0.00
0.00
0.00
30.00
0.00
0.00
0.00
31.00
0.00
0.00
0.00
32.00
0.00
0.00
0.00
33.00
0.00
0.00
0.00
34.00
0.00
0.00
0.00
35.00
0.00
0.00
0.00
36.00
0.00
0.00
0.00
37.00
0.00
0.00
0.00
38.00
0.00
0.00
0.00
39.00
0.00
0.00
0.00
40.00
0.00
0.00
0.00
41.00
0.00
0.00
0.00
42.00
0.00
0.00
0.00
43.00
0.00
0.00
0.00
44.00
0.00
0.00
0.00
45.00
0.00
0.00
0.00
46.00
0.00
0.00
0.00
47.00
0.00
0.00
0.00
48.00
0.00
0.00
0.00
49.00
0.00
0.00
0.00
50.00
0.00
0.00
0.00
51.00
0.00
0.00
0.00
52.00
0.00
0.00
0.00
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.00
0.00
0.00
54.00
0.00
0.00
0.00
55.00
0.00
0.00
0.00
56.00
0.00
0.00
0.00
57.00
0.00
0.00
0.00
58.00
0.00
0.00
0.00
59.00
0.00
0.00
0.00
60.00
0.00
0.00
0.00
61.00
0.00
0.00
0.00
62.00
0.00
0.00
0.00
63.00
0.00
0.00
0.00
64.00
0.00
0.00
0.00
65.00
0.00
0.00
0.00
66.00
0.00
0.00
0.00
67.00
0.00
0.00
0.00
68.00
0.00
0.00
0.00
69.00
0.00
0.00
0.00
70.00
0.00
0.00
0.00
71.00
0.00
0.00
0.00
72.00
0.00
0.00
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 93
Summary for Link P0I#1: Post -Development P0I#1
Inflow Area = 42.987 ac, 10.69% Impervious, Inflow Depth > 0.61" for 2 Year event
Inflow = 8.14 cfs @ 12.20 hrs, Volume= 2.194 of
Primary = 8.14 cfs @ 12.20 hrs, Volume= 2.194 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
U
3
0
LL
0
Link P0I#1: Post -Development P0I#1
Hydrographh
+ +
r 8.14 cfs
fi
_
t 111Tl'o
4t2 9�8�a1C
I HI
HI
H
H
IH
I+I HI
HI
H
�IHHHHHIHHHI-r
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I-4I-�I+I4-IH
H IP
"
_+
I + I -
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
❑ Inflow
❑ Primary

Weddington Acres HydroCAD Revised Layout Type // 24-hr 2 Year Rainfall=3.52"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 94
Hydrograph for Link P0I#1: Post -Development P0I#1
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.00
0.00
0.00
2.00
0.00
0.00
0.00
3.00
0.00
0.00
0.00
4.00
0.00
0.00
0.00
5.00
0.00
0.00
0.00
6.00
0.00
0.00
0.00
7.00
0.00
0.00
0.00
8.00
0.00
0.00
0.00
9.00
0.00
0.00
0.00
10.00
0.00
0.00
0.00
11.00
0.00
0.00
0.00
12.00
2.36
0.00
2.36
13.00
2.26
0.00
2.26
14.00
2.00
0.00
2.00
15.00
2.05
0.00
2.05
16.00
1.81
0.00
1.81
17.00
1.56
0.00
1.56
18.00
1.40
0.00
1.40
19.00
1.24
0.00
1.24
20.00
1.09
0.00
1.09
21.00
0.98
0.00
0.98
22.00
0.93
0.00
0.93
23.00
0.89
0.00
0.89
24.00
0.86
0.00
0.86
25.00
0.31
0.00
0.31
26.00
0.19
0.00
0.19
27.00
0.16
0.00
0.16
28.00
0.16
0.00
0.16
29.00
0.15
0.00
0.15
30.00
0.15
0.00
0.15
31.00
0.15
0.00
0.15
32.00
0.15
0.00
0.15
33.00
0.15
0.00
0.15
34.00
0.15
0.00
0.15
35.00
0.15
0.00
0.15
36.00
0.15
0.00
0.15
37.00
0.14
0.00
0.14
38.00
0.14
0.00
0.14
39.00
0.14
0.00
0.14
40.00
0.14
0.00
0.14
41.00
0.14
0.00
0.14
42.00
0.14
0.00
0.14
43.00
0.14
0.00
0.14
44.00
0.13
0.00
0.13
45.00
0.13
0.00
0.13
46.00
0.13
0.00
0.13
47.00
0.13
0.00
0.13
48.00
0.13
0.00
0.13
49.00
0.13
0.00
0.13
50.00
0.13
0.00
0.13
51.00
0.12
0.00
0.12
52.00
0.12
0.00
0.12
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.12
0.00
0.12
54.00
0.12
0.00
0.12
55.00
0.12
0.00
0.12
56.00
0.12
0.00
0.12
57.00
0.12
0.00
0.12
58.00
0.11
0.00
0.11
59.00
0.11
0.00
0.11
60.00
0.11
0.00
0.11
61.00
0.11
0.00
0.11
62.00
0.11
0.00
0.11
63.00
0.11
0.00
0.11
64.00
0.10
0.00
0.10
65.00
0.10
0.00
0.10
66.00
0.10
0.00
0.10
67.00
0.10
0.00
0.10
68.00
0.10
0.00
0.10
69.00
0.09
0.00
0.09
70.00
0.09
0.00
0.09
71.00
0.09
0.00
0.09
72.00
0.09
0.00
0.09

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Paae 95
Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment IS: Pre #1 Runoff Area=9.570 ac 0.00% Impervious Runoff Depth=1.24"
Tc=18.5 min CN=58 Runoff=12.08 cfs 0.990 of
Subcatchment2S: Pre #2 Runoff Area=10.386 ac 0.00% Impervious Runoff Depth=1.38"
Tc=23.8 min CN=60 Runoff=12.81 cfs 1.192 of
Subcatchment3S: Pre #3 Runoff Area=16.909 ac 0.00% Impervious Runoff Depth=1.05"
Tc=23.6 min CN=55 Runoff=14.36 cfs 1.473 of
Subcatchment5S: By-Pass#2 Runoff Area=14.199 ac 0.00% Impervious Runoff Depth=1.38"
Tc=23.1 min CN=60 Runoff=17.85 cfs 1.630 of
Subcatchment6S: By-Pass#1 Runoff Area=7.040 ac 0.00% Impervious Runoff Depth=1.31"
Tc=18.5 min CN=59 Runoff=9.53 cfs 0.768 of
SubcatchmentPOI#2: Post -Development Runoff Area=1.540 ac 0.00% Impervious Runoff Depth=1.74"
Tc=17.6 min CN=65 Runoff=3.06 cfs 0.223 of
SubcatchmentPOI#3: Post -Development Runoff Area=4.635 ac 6.84% Impervious Runoff Depth=1.89"
Tc=14.9 min CN=67 Runoff=11.05 cfs 0.732 of
SubcatchmentPOI#4: Post -Development Runoff Area=1.796 ac 18.71% Impervious Runoff Depth=1.97"
Tc=25.5 min CN=68 Runoff=3.29 cfs 0.295 of
SubcatchmentPOND#1: Runoff Area=16.500 ac 18.59% Impervious Runoff Depth=1.82"
Tc=25.7 min CN=66 Runoff=27.34 cfs 2.498 of
SubcatchmentPOND#2: Post -Development Runoff Area=5.248 ac 29.12% Impervious Runoff Depth=2.22"
Tc=11.0 min CN=71 Runoff=17.00 cfs 0.969 of
Subcatchment PRE-POI#2: Pre -Development Runoff Area=4.456 ac 0.00% Impervious Runoff Depth=1.74"
Tc=18.4 min CN=65 Runoff=8.63 cfs 0.646 of
Subcatchment PRE-POI#3: Pre -Development Runoff Area=7.087 ac 1.93% Impervious Runoff Depth=1.82"
Tc=20.0 min CN=66 Runoff=13.71 cfs 1.073 of
Subcatchment PRE-POI#4: Pre -Development Runoff Area=2.545 ac 5.30% Impervious Runoff Depth=1.89"
Tc=15.9 min CN=67 Runoff=5.88 cfs 0.402 of
Pond DIET POND-1: Detention Pond #1 Peak Elev=712.52' Storage=41,624 cf Inflow=27.34 cfs 2.498 of
Primary=8.57 cfs 2.188 of Secondary=0.00 cfs 0.000 of Outflow=8.57 cfs 2.188 of
Pond DIET POND-2: Detention Pond #2 Peak Elev=699.70' Storage=16,234 cf Inflow=17.00 cfs 0.969 of
Primary=5.52 cfs 0.951 of Secondary=0.00 cfs 0.000 of Outflow=5.52 cfs 0.951 of
Link 4L: Pre-DevelopmentPOI Inflow=38.27 cfs 3.655 of
Primary=38.27 cfs 3.655 of

Weddington Acres HydroCAD Revised Layout Type // 24-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 96
Link POI#1: Post-DevelopmentPO1#1
Inflow=32.32 cfs 5.537 of
Primary=32.32 cfs 5.537 of
Total Runoff Area = 101.911 ac Runoff Volume = 12.891 of Average Runoff Depth = 1.52"
94.58% Pervious = 96.390 ac 5.42% Impervious = 5.521 ac

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 97
Summary for Subcatchment 1S: Pre #1
Runoff = 12.08 cfs @ 12.13 hrs, Volume= 0.990 af, Depth= 1.24"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 Year Rainfall=5.13"
Area (ac) CN Description
8.570 55 Woods, Good, HSG B
1.000 79 Woods/grass comb., Good, HSG D
9.570 58 Weighted Average
9.570 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.5 Direct Entry,
Subcatchment 1S: Pre #1
Hydrograph
13
12
12.08
I
cfs I
I T I T I T I fi I fil �I �I N II
11j
Ra-�nTw��.I��
10
1-
4 14 1 T 1 T 1 1 1 1 IRUh-WlAIll4a�--9.570 Ad
9
8
1
1 1 1
IT T T I I I H --F�YPPfI YI14T�70f01 "f
7
a
T 1 �I L1 � � �-n e� �. f
-
° 6
U.
5
C=18.5 min
- T 1 t t 1 fi t fi r-1 N 1-1 Irt rt RCN-8
4
11111111111111111111111111111
3
IT1 1 14-1�I H H'HI 1-4 14I4141T
2
1
I I T I T 1 T1 T-1 T7 T 1-7 IT I T 17 IT
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 98
Hydrograph for Subcatchment 1S: Pre #1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.05
0.00
0.00
2.00
0.11
0.00
0.00
3.00
0.18
0.00
0.00
4.00
0.25
0.00
0.00
5.00
0.32
0.00
0.00
6.00
0.41
0.00
0.00
7.00
0.51
0.00
0.00
8.00
0.62
0.00
0.00
9.00
0.75
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.00
0.00
12.00
3.40
0.41
6.76
13.00
3.96
0.65
1.67
14.00
4.21
0.76
0.99
15.00
4.38
0.84
0.77
16.00
4.51
0.91
0.62
17.00
4.63
0.97
0.54
18.00
4.72
1.02
0.49
19.00
4.81
1.07
0.43
20.00
4.88
1.11
0.37
21.00
4.95
1.14
0.34
22.00
5.01
1.18
0.33
23.00
5.07
1.21
0.32
24.00
5.13
1.24
0.31
25.00
5.13
1.24
0.00
26.00
5.13
1.24
0.00
27.00
5.13
1.24
0.00
28.00
5.13
1.24
0.00
29.00
5.13
1.24
0.00
30.00
5.13
1.24
0.00
31.00
5.13
1.24
0.00
32.00
5.13
1.24
0.00
33.00
5.13
1.24
0.00
34.00
5.13
1.24
0.00
35.00
5.13
1.24
0.00
36.00
5.13
1.24
0.00
37.00
5.13
1.24
0.00
38.00
5.13
1.24
0.00
39.00
5.13
1.24
0.00
40.00
5.13
1.24
0.00
41.00
5.13
1.24
0.00
42.00
5.13
1.24
0.00
43.00
5.13
1.24
0.00
44.00
5.13
1.24
0.00
45.00
5.13
1.24
0.00
46.00
5.13
1.24
0.00
47.00
5.13
1.24
0.00
48.00
5.13
1.24
0.00
49.00
5.13
1.24
0.00
50.00
5.13
1.24
0.00
51.00
5.13
1.24
0.00
52.00
5.13
1.24
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.13
1.24
0.00
54.00
5.13
1.24
0.00
55.00
5.13
1.24
0.00
56.00
5.13
1.24
0.00
57.00
5.13
1.24
0.00
58.00
5.13
1.24
0.00
59.00
5.13
1.24
0.00
60.00
5.13
1.24
0.00
61.00
5.13
1.24
0.00
62.00
5.13
1.24
0.00
63.00
5.13
1.24
0.00
64.00
5.13
1.24
0.00
65.00
5.13
1.24
0.00
66.00
5.13
1.24
0.00
67.00
5.13
1.24
0.00
68.00
5.13
1.24
0.00
69.00
5.13
1.24
0.00
70.00
5.13
1.24
0.00
71.00
5.13
1.24
0.00
72.00
5.13
1.24
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 99
Summary for Subcatchment 2S: Pre #2
Runoff = 12.81 cfs @ 12.20 hrs, Volume= 1.192 af, Depth= 1.38"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 Year Rainfall=5.13"
Area (ac) CN Description
8.386 55 Woods, Good, HSG B
2.000 79 Woods/grass comb., Good, HSG D
10.386 60 Weighted Average
10.386 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
23.8 Direct Entry,
Subcatchment 2S: Pre #2
Hydrograph
14-'12.81
13
III_
cfs
I I
12
1--� 4
14
1 T 1 T 1
4-1
�-I
H
`�`�a�r4Rain�116t.�'�
11
10
1 1 1 1 1
1
I I 1
1 1
1
1 1
FWd nloff l Alyda4=164d 110.6
9
1- 4
14
14- 1 T 1
4-1
�-I
IJ�4P°If'
IT T
T
T T
T
7-1
TI
TInllle
'ICI
3
LL
6
1-4 1-�
IT
1 T I T I
-k1
-�-I
�-I
;�-31.
�-I N 1-4 14 I �
5
4
T
17
1 T I T I
TI
7-1
TI
TI T IT IT IT 17 IT
3
I41
1TI4-1
�1
�I
4 I4ITIT
2
1
I T'
T1
TI
T1
t--I T IT Ir IT
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 100
Hydrograph for Subcatchment 2S: Pre #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.05
0.00
0.00
2.00
0.11
0.00
0.00
3.00
0.18
0.00
0.00
4.00
0.25
0.00
0.00
5.00
0.32
0.00
0.00
6.00
0.41
0.00
0.00
7.00
0.51
0.00
0.00
8.00
0.62
0.00
0.00
9.00
0.75
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.00
0.00
12.00
3.40
0.49
5.41
13.00
3.96
0.74
2.23
14.00
4.21
0.87
1.21
15.00
4.38
0.95
0.92
16.00
4.51
1.03
0.74
17.00
4.63
1.09
0.63
18.00
4.72
1.14
0.57
19.00
4.81
1.19
0.50
20.00
4.88
1.23
0.43
21.00
4.95
1.27
0.39
22.00
5.01
1.31
0.38
23.00
5.07
1.34
0.37
24.00
5.13
1.38
0.36
25.00
5.13
1.38
0.00
26.00
5.13
1.38
0.00
27.00
5.13
1.38
0.00
28.00
5.13
1.38
0.00
29.00
5.13
1.38
0.00
30.00
5.13
1.38
0.00
31.00
5.13
1.38
0.00
32.00
5.13
1.38
0.00
33.00
5.13
1.38
0.00
34.00
5.13
1.38
0.00
35.00
5.13
1.38
0.00
36.00
5.13
1.38
0.00
37.00
5.13
1.38
0.00
38.00
5.13
1.38
0.00
39.00
5.13
1.38
0.00
40.00
5.13
1.38
0.00
41.00
5.13
1.38
0.00
42.00
5.13
1.38
0.00
43.00
5.13
1.38
0.00
44.00
5.13
1.38
0.00
45.00
5.13
1.38
0.00
46.00
5.13
1.38
0.00
47.00
5.13
1.38
0.00
48.00
5.13
1.38
0.00
49.00
5.13
1.38
0.00
50.00
5.13
1.38
0.00
51.00
5.13
1.38
0.00
52.00
5.13
1.38
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.13
1.38
0.00
54.00
5.13
1.38
0.00
55.00
5.13
1.38
0.00
56.00
5.13
1.38
0.00
57.00
5.13
1.38
0.00
58.00
5.13
1.38
0.00
59.00
5.13
1.38
0.00
60.00
5.13
1.38
0.00
61.00
5.13
1.38
0.00
62.00
5.13
1.38
0.00
63.00
5.13
1.38
0.00
64.00
5.13
1.38
0.00
65.00
5.13
1.38
0.00
66.00
5.13
1.38
0.00
67.00
5.13
1.38
0.00
68.00
5.13
1.38
0.00
69.00
5.13
1.38
0.00
70.00
5.13
1.38
0.00
71.00
5.13
1.38
0.00
72.00
5.13
1.38
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 101
Summary for Subcatchment 3S: Pre #3
Runoff = 14.36 cfs @ 12.21 hrs, Volume= 1.473 af, Depth= 1.05"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 Year Rainfall=5.13"
Area (ac) CN Description
11.470 55 Woods, Good, HSG B
5.439 56 Brush, Fair, HSG B
16.909 55 Weighted Average
16.909 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
23.6 Direct Entry,
Subcatchment 3S: Pre #3
Hydrograph
16
IH
riH HI 7I
15
1 14.36
cfs
4
14 1 H 14-1
HI
HI HI H 1-4
14
13
IH
-1
I-L
I H I I
L I
HI
HI lRlanI�.h��
12
11
H 1
H
1 H
I H H I
H I
fi I
H� nla#f lAi*6=16.909 -id
10
HL14
+ 14-1
HI
�490# Y-0���� f 7"f
3 8
HLI
LI
HI
HI HI�nll �j'I�I
LL
H 1HIH
H
C= 3 min
H H IH H I r H�L
6
5
H 1HI
HI
H
H H HI H H 1H 1H 1 H
4
3
IIIIIIIIII111111111111IIII
2fi
I
fit
fil
1 1 +—I H 1-4 1Irt 1fi I H
1
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 102
Hydrograph for Subcatchment 3S: Pre #3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.05
0.00
0.00
2.00
0.11
0.00
0.00
3.00
0.18
0.00
0.00
4.00
0.25
0.00
0.00
5.00
0.32
0.00
0.00
6.00
0.41
0.00
0.00
7.00
0.51
0.00
0.00
8.00
0.62
0.00
0.00
9.00
0.75
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.00
0.00
12.00
3.40
0.31
4.75
13.00
3.96
0.51
2.87
14.00
4.21
0.61
1.60
15.00
4.38
0.69
1.23
16.00
4.51
0.75
1.00
17.00
4.63
0.80
0.86
18.00
4.72
0.85
0.78
19.00
4.81
0.89
0.69
20.00
4.88
0.92
0.59
21.00
4.95
0.95
0.55
22.00
5.01
0.99
0.53
23.00
5.07
1.02
0.51
24.00
5.13
1.05
0.50
25.00
5.13
1.05
0.00
26.00
5.13
1.05
0.00
27.00
5.13
1.05
0.00
28.00
5.13
1.05
0.00
29.00
5.13
1.05
0.00
30.00
5.13
1.05
0.00
31.00
5.13
1.05
0.00
32.00
5.13
1.05
0.00
33.00
5.13
1.05
0.00
34.00
5.13
1.05
0.00
35.00
5.13
1.05
0.00
36.00
5.13
1.05
0.00
37.00
5.13
1.05
0.00
38.00
5.13
1.05
0.00
39.00
5.13
1.05
0.00
40.00
5.13
1.05
0.00
41.00
5.13
1.05
0.00
42.00
5.13
1.05
0.00
43.00
5.13
1.05
0.00
44.00
5.13
1.05
0.00
45.00
5.13
1.05
0.00
46.00
5.13
1.05
0.00
47.00
5.13
1.05
0.00
48.00
5.13
1.05
0.00
49.00
5.13
1.05
0.00
50.00
5.13
1.05
0.00
51.00
5.13
1.05
0.00
52.00
5.13
1.05
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.13
1.05
0.00
54.00
5.13
1.05
0.00
55.00
5.13
1.05
0.00
56.00
5.13
1.05
0.00
57.00
5.13
1.05
0.00
58.00
5.13
1.05
0.00
59.00
5.13
1.05
0.00
60.00
5.13
1.05
0.00
61.00
5.13
1.05
0.00
62.00
5.13
1.05
0.00
63.00
5.13
1.05
0.00
64.00
5.13
1.05
0.00
65.00
5.13
1.05
0.00
66.00
5.13
1.05
0.00
67.00
5.13
1.05
0.00
68.00
5.13
1.05
0.00
69.00
5.13
1.05
0.00
70.00
5.13
1.05
0.00
71.00
5.13
1.05
0.00
72.00
5.13
1.05
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 103
Summary for Subcatchment 5S: By -Pass #2
Runoff = 17.85 cfs @ 12.19 hrs, Volume= 1.630 af, Depth= 1.38"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 Year Rainfall=5.13"
Area (ac) CN Description
11.999 58 Woods/grass comb., Good, HSG B
2.200 73 Brush, Good, HSG D
14.199 60 Weighted Average
14.199 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
23.1 Direct Entry,
Subcatchment 5S: By -Pass #2
Hydrograph
■ Runoff
19
17.85 cfs
18
17
_
16
15
14
I�
13
12
W 4
w 11
—
3 10
1-4 I 4
0 9
LL
8
I�
7
—
6
i i z i L i z i zi L-i n❑ 1--1 -,- iS-id��
fe iRleffnml'�
-T
IT IT I
T 171
FI Fri nloff IAlr =11 #.11-799 Eck
� I
� Vn f Q
14
1 � I _k I
-kI
�1
�I
�I �nl° I
I41�I-kI-kI
�1
�I
= 3 nun
�I N 1-4 14 I4 L �
I41+1+11-1-H
H
H H 1� 14+ I4141
,41+1+11-1-H
H
H H 1--1 14I4141+
I I H 11 H 14 1
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 104
Hydrograph for Subcatchment 5S: By -Pass #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.05
0.00
0.00
2.00
0.11
0.00
0.00
3.00
0.18
0.00
0.00
4.00
0.25
0.00
0.00
5.00
0.32
0.00
0.00
6.00
0.41
0.00
0.00
7.00
0.51
0.00
0.00
8.00
0.62
0.00
0.00
9.00
0.75
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.00
0.00
12.00
3.40
0.49
7.89
13.00
3.96
0.74
2.99
14.00
4.21
0.87
1.64
15.00
4.38
0.95
1.25
16.00
4.51
1.03
1.01
17.00
4.63
1.09
0.86
18.00
4.72
1.14
0.77
19.00
4.81
1.19
0.68
20.00
4.88
1.23
0.58
21.00
4.95
1.27
0.54
22.00
5.01
1.31
0.52
23.00
5.07
1.34
0.50
24.00
5.13
1.38
0.49
25.00
5.13
1.38
0.00
26.00
5.13
1.38
0.00
27.00
5.13
1.38
0.00
28.00
5.13
1.38
0.00
29.00
5.13
1.38
0.00
30.00
5.13
1.38
0.00
31.00
5.13
1.38
0.00
32.00
5.13
1.38
0.00
33.00
5.13
1.38
0.00
34.00
5.13
1.38
0.00
35.00
5.13
1.38
0.00
36.00
5.13
1.38
0.00
37.00
5.13
1.38
0.00
38.00
5.13
1.38
0.00
39.00
5.13
1.38
0.00
40.00
5.13
1.38
0.00
41.00
5.13
1.38
0.00
42.00
5.13
1.38
0.00
43.00
5.13
1.38
0.00
44.00
5.13
1.38
0.00
45.00
5.13
1.38
0.00
46.00
5.13
1.38
0.00
47.00
5.13
1.38
0.00
48.00
5.13
1.38
0.00
49.00
5.13
1.38
0.00
50.00
5.13
1.38
0.00
51.00
5.13
1.38
0.00
52.00
5.13
1.38
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.13
1.38
0.00
54.00
5.13
1.38
0.00
55.00
5.13
1.38
0.00
56.00
5.13
1.38
0.00
57.00
5.13
1.38
0.00
58.00
5.13
1.38
0.00
59.00
5.13
1.38
0.00
60.00
5.13
1.38
0.00
61.00
5.13
1.38
0.00
62.00
5.13
1.38
0.00
63.00
5.13
1.38
0.00
64.00
5.13
1.38
0.00
65.00
5.13
1.38
0.00
66.00
5.13
1.38
0.00
67.00
5.13
1.38
0.00
68.00
5.13
1.38
0.00
69.00
5.13
1.38
0.00
70.00
5.13
1.38
0.00
71.00
5.13
1.38
0.00
72.00
5.13
1.38
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 105
Summary for Subcatchment 6S: By -Pass #1
Runoff = 9.53 cfs @ 12.13 hrs, Volume= 0.768 af, Depth= 1.31"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 Year Rainfall=5.13"
Area (ac) CN Description
6.540 58 Woods/grass comb., Good, HSG B
0.500 73 Brush, Good, HSG D
7.040 59 Weighted Average
7.040 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.5 Direct Entry,
Subcatchment 6S: By -Pass #1
Hydrograph
■ Runoff
10
9
9.53cfs
1111111111111111111
�ITITITITIL-1�1
s
T 1 4-1 �-I �-I Ruh-bf#-AtOa�=7.040 Ad
7
U 6
0 5
_t I T I T I T I t I fil t-I �I nl° I e� h 1.31_'j
U.
4
i
c= 8.5 min
� T T I T T T T TI T IT IT IT dN49I
3
-1 1TITITITI TI TI II T 1 1 IT IT 17 1T1
2
III IIIIIIIIIIIIIIII IIIIIII
1
�'�II II III�III
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 106
Hydrograph for Subcatchment 6S: By -Pass #1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.05
0.00
0.00
2.00
0.11
0.00
0.00
3.00
0.18
0.00
0.00
4.00
0.25
0.00
0.00
5.00
0.32
0.00
0.00
6.00
0.41
0.00
0.00
7.00
0.51
0.00
0.00
8.00
0.62
0.00
0.00
9.00
0.75
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.00
0.00
12.00
3.40
0.45
5.48
13.00
3.96
0.69
1.28
14.00
4.21
0.81
0.76
15.00
4.38
0.90
0.59
16.00
4.51
0.97
0.47
17.00
4.63
1.03
0.41
18.00
4.72
1.08
0.37
19.00
4.81
1.13
0.32
20.00
4.88
1.17
0.28
21.00
4.95
1.21
0.26
22.00
5.01
1.24
0.25
23.00
5.07
1.28
0.24
24.00
5.13
1.31
0.23
25.00
5.13
1.31
0.00
26.00
5.13
1.31
0.00
27.00
5.13
1.31
0.00
28.00
5.13
1.31
0.00
29.00
5.13
1.31
0.00
30.00
5.13
1.31
0.00
31.00
5.13
1.31
0.00
32.00
5.13
1.31
0.00
33.00
5.13
1.31
0.00
34.00
5.13
1.31
0.00
35.00
5.13
1.31
0.00
36.00
5.13
1.31
0.00
37.00
5.13
1.31
0.00
38.00
5.13
1.31
0.00
39.00
5.13
1.31
0.00
40.00
5.13
1.31
0.00
41.00
5.13
1.31
0.00
42.00
5.13
1.31
0.00
43.00
5.13
1.31
0.00
44.00
5.13
1.31
0.00
45.00
5.13
1.31
0.00
46.00
5.13
1.31
0.00
47.00
5.13
1.31
0.00
48.00
5.13
1.31
0.00
49.00
5.13
1.31
0.00
50.00
5.13
1.31
0.00
51.00
5.13
1.31
0.00
52.00
5.13
1.31
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.13
1.31
0.00
54.00
5.13
1.31
0.00
55.00
5.13
1.31
0.00
56.00
5.13
1.31
0.00
57.00
5.13
1.31
0.00
58.00
5.13
1.31
0.00
59.00
5.13
1.31
0.00
60.00
5.13
1.31
0.00
61.00
5.13
1.31
0.00
62.00
5.13
1.31
0.00
63.00
5.13
1.31
0.00
64.00
5.13
1.31
0.00
65.00
5.13
1.31
0.00
66.00
5.13
1.31
0.00
67.00
5.13
1.31
0.00
68.00
5.13
1.31
0.00
69.00
5.13
1.31
0.00
70.00
5.13
1.31
0.00
71.00
5.13
1.31
0.00
72.00
5.13
1.31
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 107
Summary for Subcatchment POI#2: Post -Development POI#2
Runoff = 3.06 cfs @ 12.11 hrs, Volume= 0.223 af, Depth= 1.74"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 Year Rainfall=5.13"
Area (ac) CN Description
1.540 65 Woods/grass comb., Fair, HSG B
1.540 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
17.6 Direct Entry,
Subcatchment POI#2: Post -Development POW
Hydrograph
■ Runoff
� 3.06 cfs � � � � �
3 1T�i�e I I �1�-�i r�
16 * lair IF �ain6IIL- .A1 '�
III I I IRluhbff Area0l.540 ad
2' 7 7 1 T- TI TI FP�4riof�Vojume=0.2?�-�tf
�111.111noff Deo h=1.71LL ��� c= min
�� iIiIIIIIIIIIIIIIIII��L��
1 111111111111111111111
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 108
Hydrograph for Subcatchment POI#2: Post -Development POI#2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.05
0.00
0.00
2.00
0.11
0.00
0.00
3.00
0.18
0.00
0.00
4.00
0.25
0.00
0.00
5.00
0.32
0.00
0.00
6.00
0.41
0.00
0.00
7.00
0.51
0.00
0.00
8.00
0.62
0.00
0.00
9.00
0.75
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.00
0.01
12.00
3.40
0.70
2.06
13.00
3.96
1.01
0.34
14.00
4.21
1.15
0.20
15.00
4.38
1.25
0.16
16.00
4.51
1.34
0.12
17.00
4.63
1.41
0.11
18.00
4.72
1.47
0.10
19.00
4.81
1.53
0.08
20.00
4.88
1.58
0.07
21.00
4.95
1.62
0.07
22.00
5.01
1.66
0.06
23.00
5.07
1.70
0.06
24.00
5.13
1.74
0.06
25.00
5.13
1.74
0.00
26.00
5.13
1.74
0.00
27.00
5.13
1.74
0.00
28.00
5.13
1.74
0.00
29.00
5.13
1.74
0.00
30.00
5.13
1.74
0.00
31.00
5.13
1.74
0.00
32.00
5.13
1.74
0.00
33.00
5.13
1.74
0.00
34.00
5.13
1.74
0.00
35.00
5.13
1.74
0.00
36.00
5.13
1.74
0.00
37.00
5.13
1.74
0.00
38.00
5.13
1.74
0.00
39.00
5.13
1.74
0.00
40.00
5.13
1.74
0.00
41.00
5.13
1.74
0.00
42.00
5.13
1.74
0.00
43.00
5.13
1.74
0.00
44.00
5.13
1.74
0.00
45.00
5.13
1.74
0.00
46.00
5.13
1.74
0.00
47.00
5.13
1.74
0.00
48.00
5.13
1.74
0.00
49.00
5.13
1.74
0.00
50.00
5.13
1.74
0.00
51.00
5.13
1.74
0.00
52.00
5.13
1.74
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.13
1.74
0.00
54.00
5.13
1.74
0.00
55.00
5.13
1.74
0.00
56.00
5.13
1.74
0.00
57.00
5.13
1.74
0.00
58.00
5.13
1.74
0.00
59.00
5.13
1.74
0.00
60.00
5.13
1.74
0.00
61.00
5.13
1.74
0.00
62.00
5.13
1.74
0.00
63.00
5.13
1.74
0.00
64.00
5.13
1.74
0.00
65.00
5.13
1.74
0.00
66.00
5.13
1.74
0.00
67.00
5.13
1.74
0.00
68.00
5.13
1.74
0.00
69.00
5.13
1.74
0.00
70.00
5.13
1.74
0.00
71.00
5.13
1.74
0.00
72.00
5.13
1.74
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 109
Summary for Subcatchment P0I#3: Post -Development P0I#3
Runoff = 11.05 cfs @ 12.08 hrs, Volume= 0.732 af, Depth= 1.89"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 Year Rainfall=5.13"
Area (ac) CN Description
4.318 65 Woods/grass comb., Fair, HSG B
0.317 98 Paved parking, HSG B
4.635 67 Weighted Average
4.318 93.16% Pervious Area
0.317 6.84% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
14.9 Direct Entry,
Subcatchment P0I#3: Post -Development P0I#3
Hydrograph
12
1--1 14
1+1+11-1-k-I H H H I4I4141+
Runoff
11
11.05
cfs rI I
rt rt�� fi �1 �1 It
�i 11
10
9
d Li I -L1 11 L I LI LI 1Ruh bffJAitaO_4.635i Ad
0
6-
Ong
T T T T T n
3
nun
U.
5
1
1IIIIMIIIIIIIIIII4
1--t1
� I � 14-1 �I �I �I N 1-4 1-4 I4
3
I t I t 1fit tl t-I �I N 1-1 It It It It111111
LM
2
Fill 11I111111 I
0 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 110
Hydrograph for Subcatchment POI#3: Post -Development POI#3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.05
0.00
0.00
2.00
0.11
0.00
0.00
3.00
0.18
0.00
0.00
4.00
0.25
0.00
0.00
5.00
0.32
0.00
0.00
6.00
0.41
0.00
0.00
7.00
0.51
0.00
0.00
8.00
0.62
0.00
0.00
9.00
0.75
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.01
0.08
12.00
3.40
0.80
8.76
13.00
3.96
1.12
1.06
14.00
4.21
1.27
0.63
15.00
4.38
1.38
0.49
16.00
4.51
1.47
0.39
17.00
4.63
1.55
0.34
18.00
4.72
1.61
0.30
19.00
4.81
1.67
0.26
20.00
4.88
1.72
0.22
21.00
4.95
1.77
0.21
22.00
5.01
1.81
0.20
23.00
5.07
1.85
0.20
24.00
5.13
1.89
0.19
25.00
5.13
1.89
0.00
26.00
5.13
1.89
0.00
27.00
5.13
1.89
0.00
28.00
5.13
1.89
0.00
29.00
5.13
1.89
0.00
30.00
5.13
1.89
0.00
31.00
5.13
1.89
0.00
32.00
5.13
1.89
0.00
33.00
5.13
1.89
0.00
34.00
5.13
1.89
0.00
35.00
5.13
1.89
0.00
36.00
5.13
1.89
0.00
37.00
5.13
1.89
0.00
38.00
5.13
1.89
0.00
39.00
5.13
1.89
0.00
40.00
5.13
1.89
0.00
41.00
5.13
1.89
0.00
42.00
5.13
1.89
0.00
43.00
5.13
1.89
0.00
44.00
5.13
1.89
0.00
45.00
5.13
1.89
0.00
46.00
5.13
1.89
0.00
47.00
5.13
1.89
0.00
48.00
5.13
1.89
0.00
49.00
5.13
1.89
0.00
50.00
5.13
1.89
0.00
51.00
5.13
1.89
0.00
52.00
5.13
1.89
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.13
1.89
0.00
54.00
5.13
1.89
0.00
55.00
5.13
1.89
0.00
56.00
5.13
1.89
0.00
57.00
5.13
1.89
0.00
58.00
5.13
1.89
0.00
59.00
5.13
1.89
0.00
60.00
5.13
1.89
0.00
61.00
5.13
1.89
0.00
62.00
5.13
1.89
0.00
63.00
5.13
1.89
0.00
64.00
5.13
1.89
0.00
65.00
5.13
1.89
0.00
66.00
5.13
1.89
0.00
67.00
5.13
1.89
0.00
68.00
5.13
1.89
0.00
69.00
5.13
1.89
0.00
70.00
5.13
1.89
0.00
71.00
5.13
1.89
0.00
72.00
5.13
1.89
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 111
Summary for Subcatchment P0I#4: Post -Development P0I#4
Runoff = 3.29 cfs @ 12.20 hrs, Volume= 0.295 af, Depth= 1.97"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 Year Rainfall=5.13"
Area (ac) CN Description
1.460 61 >75% Grass cover, Good, HSG B
0.336 98 Paved parking, HSG B
1.796 68 Weighted Average
1.460 81.29% Pervious Area
0.336 18.71 % Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
25.5 Direct Entry,
Subcatchment P0I#4: Post -Development P0I#4
Hydrograph
3.29 cfs
3 IIIII III IIII III 10 Year (Rainfall=51 Al 'i
IIIII III IIII IIII iRunoff JArda#1.796 ad
I� J�49olfjyqjl4iylla=0}295 a#
2 III III IIII ( I I I I I �ulnl°J=h- IDe� 1
c
3�
min
I-1 I Irt TI _FI rI rI r I_ I_1 Irt IT I T �I
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
❑ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 112
Hydrograph for Subcatchment POI#4: Post -Development POI#4
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.05
0.00
0.00
2.00
0.11
0.00
0.00
3.00
0.18
0.00
0.00
4.00
0.25
0.00
0.00
5.00
0.32
0.00
0.00
6.00
0.41
0.00
0.00
7.00
0.51
0.00
0.00
8.00
0.62
0.00
0.00
9.00
0.75
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.01
0.03
12.00
3.40
0.84
1.55
13.00
3.96
1.18
0.54
14.00
4.21
1.34
0.27
15.00
4.38
1.45
0.20
16.00
4.51
1.54
0.16
17.00
4.63
1.62
0.14
18.00
4.72
1.69
0.12
19.00
4.81
1.75
0.11
20.00
4.88
1.80
0.09
21.00
4.95
1.84
0.08
22.00
5.01
1.89
0.08
23.00
5.07
1.93
0.08
24.00
5.13
1.97
0.07
25.00
5.13
1.97
0.00
26.00
5.13
1.97
0.00
27.00
5.13
1.97
0.00
28.00
5.13
1.97
0.00
29.00
5.13
1.97
0.00
30.00
5.13
1.97
0.00
31.00
5.13
1.97
0.00
32.00
5.13
1.97
0.00
33.00
5.13
1.97
0.00
34.00
5.13
1.97
0.00
35.00
5.13
1.97
0.00
36.00
5.13
1.97
0.00
37.00
5.13
1.97
0.00
38.00
5.13
1.97
0.00
39.00
5.13
1.97
0.00
40.00
5.13
1.97
0.00
41.00
5.13
1.97
0.00
42.00
5.13
1.97
0.00
43.00
5.13
1.97
0.00
44.00
5.13
1.97
0.00
45.00
5.13
1.97
0.00
46.00
5.13
1.97
0.00
47.00
5.13
1.97
0.00
48.00
5.13
1.97
0.00
49.00
5.13
1.97
0.00
50.00
5.13
1.97
0.00
51.00
5.13
1.97
0.00
52.00
5.13
1.97
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.13
1.97
0.00
54.00
5.13
1.97
0.00
55.00
5.13
1.97
0.00
56.00
5.13
1.97
0.00
57.00
5.13
1.97
0.00
58.00
5.13
1.97
0.00
59.00
5.13
1.97
0.00
60.00
5.13
1.97
0.00
61.00
5.13
1.97
0.00
62.00
5.13
1.97
0.00
63.00
5.13
1.97
0.00
64.00
5.13
1.97
0.00
65.00
5.13
1.97
0.00
66.00
5.13
1.97
0.00
67.00
5.13
1.97
0.00
68.00
5.13
1.97
0.00
69.00
5.13
1.97
0.00
70.00
5.13
1.97
0.00
71.00
5.13
1.97
0.00
72.00
5.13
1.97
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 113
Summary for Subcatchment POND#1: Post -Development Pond#1
Runoff = 27.34 cfs @ 12.21 hrs, Volume= 2.498 af, Depth= 1.82"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 Year Rainfall=5.13"
Area (ac) CN Description
0.670
98
Paved parking, HSG B
12.602
58
Woods/grass comb., Good, HSG B
1.894
98
Roofs, HSG A
0.504
98
Water Surface, HSG B
0.830
61
>75% Grass cover, Good, HSG B
16.500
66
Weighted Average
13.432
81.41 % Pervious Area
3.068
18.59% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
25.7 Direct Entry,
Subcatchment POND#1: Post -Development Pond#1
Hydrograph
IH IH I HI HI HI H H I-T IH IH IH
28
26
24
27.34
H
cfs
H HHIHH
22
IH 1
4 HH HH
20
18
N
FtH
HIHHH
= 16
0
IH H
1441 1 �
14
"12
III
10
HHHH
8
6
I I I I I I I L
H H
H IH H lr�p� 111�1 r�
H H
fd `V��_rtRlalin6 l�itAI'V
HI
Rtinloff 1Ar"=16.500 �id
H TF yqqf� Yf14Tp=�2t419§ pf
H HI
H �-��nlrI e� =1'I"'I
HHHIHHHH
I I t
HI HI
HI H IH 1- IH 1111
I fi I fi I -t—I 1—I 1—I r-1 I—t I—t I--� I fi I fi
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34,36 38 40 42 44 1. 46 48 50 1. 52 54 56 58 60 62 1. 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 114
Hydrograph for Subcatchment POND#1: Post -Development Pond#1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.05
0.00
0.00
2.00
0.11
0.00
0.00
3.00
0.18
0.00
0.00
4.00
0.25
0.00
0.00
5.00
0.32
0.00
0.00
6.00
0.41
0.00
0.00
7.00
0.51
0.00
0.00
8.00
0.62
0.00
0.00
9.00
0.75
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.01
0.11
12.00
3.40
0.75
12.24
13.00
3.96
1.06
4.65
14.00
4.21
1.21
2.35
15.00
4.38
1.32
1.76
16.00
4.51
1.41
1.41
17.00
4.63
1.48
1.19
18.00
4.72
1.54
1.07
19.00
4.81
1.60
0.94
20.00
4.88
1.65
0.80
21.00
4.95
1.69
0.73
22.00
5.01
1.74
0.71
23.00
5.07
1.78
0.68
24.00
5.13
1.82
0.66
25.00
5.13
1.82
0.01
26.00
5.13
1.82
0.00
27.00
5.13
1.82
0.00
28.00
5.13
1.82
0.00
29.00
5.13
1.82
0.00
30.00
5.13
1.82
0.00
31.00
5.13
1.82
0.00
32.00
5.13
1.82
0.00
33.00
5.13
1.82
0.00
34.00
5.13
1.82
0.00
35.00
5.13
1.82
0.00
36.00
5.13
1.82
0.00
37.00
5.13
1.82
0.00
38.00
5.13
1.82
0.00
39.00
5.13
1.82
0.00
40.00
5.13
1.82
0.00
41.00
5.13
1.82
0.00
42.00
5.13
1.82
0.00
43.00
5.13
1.82
0.00
44.00
5.13
1.82
0.00
45.00
5.13
1.82
0.00
46.00
5.13
1.82
0.00
47.00
5.13
1.82
0.00
48.00
5.13
1.82
0.00
49.00
5.13
1.82
0.00
50.00
5.13
1.82
0.00
51.00
5.13
1.82
0.00
52.00
5.13
1.82
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.13
1.82
0.00
54.00
5.13
1.82
0.00
55.00
5.13
1.82
0.00
56.00
5.13
1.82
0.00
57.00
5.13
1.82
0.00
58.00
5.13
1.82
0.00
59.00
5.13
1.82
0.00
60.00
5.13
1.82
0.00
61.00
5.13
1.82
0.00
62.00
5.13
1.82
0.00
63.00
5.13
1.82
0.00
64.00
5.13
1.82
0.00
65.00
5.13
1.82
0.00
66.00
5.13
1.82
0.00
67.00
5.13
1.82
0.00
68.00
5.13
1.82
0.00
69.00
5.13
1.82
0.00
70.00
5.13
1.82
0.00
71.00
5.13
1.82
0.00
72.00
5.13
1.82
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 115
Summary for Subcatchment POND#2: Post -Development Pond #2
Runoff = 17.00 cfs @ 12.03 hrs, Volume= 0.969 af, Depth= 2.22"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 Year Rainfall=5.13"
Area (ac) CN Description
0.246
98
Paved parking, HSG B
3.500
58
Woods/grass comb., Good, HSG B
0.220
79
Woods/grass comb., Good, HSG D
1.010
98
Roofs, HSG A
0.272
98
Water Surface, HSG A
5.248
71
Weighted Average
3.720
70.88% Pervious Area
1.528
29.12% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
11.0 Direct Entry,
1£
1E
17
1E
1E
14
12
1e
w 11
1c
oc
LL
f
Subcatchment POND#2: Post -Development Pond #2
Hydrograph
IIIIIIIIIIIIII
1 17111 .0ocfs ITITITIF
171 -TITITIT IT
1_1 1rtIrtITITIfi
1_11
rtlrtITITIfi
1—f
_�IIItITIt
1--�I
titititit
1- -H-titititit
71 rl �d'k�alr�--R�n�Fall��.h�'I
ri ri lfthbff-ar�a�-s.¢4s -Ood
tj t-I t__1 P��njrjle
ti
IH I�IHItItI HI HI HI H H I__- IH It It
III �Illl�i-IIIII��IHI��IIII��+
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 116
Hydrograph for Subcatchment POND#2: Post -Development Pond #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.05
0.00
0.00
2.00
0.11
0.00
0.00
3.00
0.18
0.00
0.00
4.00
0.25
0.00
0.00
5.00
0.32
0.00
0.00
6.00
0.41
0.00
0.00
7.00
0.51
0.00
0.00
8.00
0.62
0.00
0.00
9.00
0.75
0.00
0.00
10.00
0.93
0.00
0.04
11.00
1.21
0.03
0.26
12.00
3.40
1.00
16.18
13.00
3.96
1.37
1.28
14.00
4.21
1.54
0.77
15.00
4.38
1.66
0.60
16.00
4.51
1.76
0.47
17.00
4.63
1.84
0.42
18.00
4.72
1.91
0.37
19.00
4.81
1.97
0.32
20.00
4.88
2.03
0.27
21.00
4.95
2.08
0.26
22.00
5.01
2.13
0.25
23.00
5.07
2.17
0.24
24.00
5.13
2.22
0.23
25.00
5.13
2.22
0.00
26.00
5.13
2.22
0.00
27.00
5.13
2.22
0.00
28.00
5.13
2.22
0.00
29.00
5.13
2.22
0.00
30.00
5.13
2.22
0.00
31.00
5.13
2.22
0.00
32.00
5.13
2.22
0.00
33.00
5.13
2.22
0.00
34.00
5.13
2.22
0.00
35.00
5.13
2.22
0.00
36.00
5.13
2.22
0.00
37.00
5.13
2.22
0.00
38.00
5.13
2.22
0.00
39.00
5.13
2.22
0.00
40.00
5.13
2.22
0.00
41.00
5.13
2.22
0.00
42.00
5.13
2.22
0.00
43.00
5.13
2.22
0.00
44.00
5.13
2.22
0.00
45.00
5.13
2.22
0.00
46.00
5.13
2.22
0.00
47.00
5.13
2.22
0.00
48.00
5.13
2.22
0.00
49.00
5.13
2.22
0.00
50.00
5.13
2.22
0.00
51.00
5.13
2.22
0.00
52.00
5.13
2.22
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.13
2.22
0.00
54.00
5.13
2.22
0.00
55.00
5.13
2.22
0.00
56.00
5.13
2.22
0.00
57.00
5.13
2.22
0.00
58.00
5.13
2.22
0.00
59.00
5.13
2.22
0.00
60.00
5.13
2.22
0.00
61.00
5.13
2.22
0.00
62.00
5.13
2.22
0.00
63.00
5.13
2.22
0.00
64.00
5.13
2.22
0.00
65.00
5.13
2.22
0.00
66.00
5.13
2.22
0.00
67.00
5.13
2.22
0.00
68.00
5.13
2.22
0.00
69.00
5.13
2.22
0.00
70.00
5.13
2.22
0.00
71.00
5.13
2.22
0.00
72.00
5.13
2.22
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 117
Summary for Subcatchment PRE-POI#2: Pre -Development POI#2
Runoff = 8.63 cfs @ 12.12 hrs, Volume= 0.646 af, Depth= 1.74"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 Year Rainfall=5.13"
Area (ac) CN Description
4.456 65 Woods/grass comb., Fair, HSG B
4.456 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.4 Direct Entry,
Subcatchment PRE-POI#2: Pre -Development POW
Hydrograph
II IIII IIII
9 1 8.63 cfs 1 1 1 1 1 1 Ir
lull-
1I I 1 d` 66 r IRlain6116t.h k
7 1 I I III 1 IRluhbff 1Atda04.456 Ad
" 1 1 1 1 P�4goffyp14n�q�Of614P Via#
o ZtImIn
LL4 II' II�IIIIIIIIIIIIIIIIIIII�L�
3 I I IIIIIIIIIIIIIIIIIIIIIIII
2 II ' 1 1 1Illlllllllllllllllllllll
1� I III Illl Illlllliliiil
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 118
Hydrograph for Subcatchment PRE-POI#2: Pre -Development POI#2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.05
0.00
0.00
2.00
0.11
0.00
0.00
3.00
0.18
0.00
0.00
4.00
0.25
0.00
0.00
5.00
0.32
0.00
0.00
6.00
0.41
0.00
0.00
7.00
0.51
0.00
0.00
8.00
0.62
0.00
0.00
9.00
0.75
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.00
0.02
12.00
3.40
0.70
5.57
13.00
3.96
1.01
1.01
14.00
4.21
1.15
0.59
15.00
4.38
1.25
0.45
16.00
4.51
1.34
0.36
17.00
4.63
1.41
0.31
18.00
4.72
1.47
0.28
19.00
4.81
1.53
0.24
20.00
4.88
1.58
0.21
21.00
4.95
1.62
0.19
22.00
5.01
1.66
0.19
23.00
5.07
1.70
0.18
24.00
5.13
1.74
0.17
25.00
5.13
1.74
0.00
26.00
5.13
1.74
0.00
27.00
5.13
1.74
0.00
28.00
5.13
1.74
0.00
29.00
5.13
1.74
0.00
30.00
5.13
1.74
0.00
31.00
5.13
1.74
0.00
32.00
5.13
1.74
0.00
33.00
5.13
1.74
0.00
34.00
5.13
1.74
0.00
35.00
5.13
1.74
0.00
36.00
5.13
1.74
0.00
37.00
5.13
1.74
0.00
38.00
5.13
1.74
0.00
39.00
5.13
1.74
0.00
40.00
5.13
1.74
0.00
41.00
5.13
1.74
0.00
42.00
5.13
1.74
0.00
43.00
5.13
1.74
0.00
44.00
5.13
1.74
0.00
45.00
5.13
1.74
0.00
46.00
5.13
1.74
0.00
47.00
5.13
1.74
0.00
48.00
5.13
1.74
0.00
49.00
5.13
1.74
0.00
50.00
5.13
1.74
0.00
51.00
5.13
1.74
0.00
52.00
5.13
1.74
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.13
1.74
0.00
54.00
5.13
1.74
0.00
55.00
5.13
1.74
0.00
56.00
5.13
1.74
0.00
57.00
5.13
1.74
0.00
58.00
5.13
1.74
0.00
59.00
5.13
1.74
0.00
60.00
5.13
1.74
0.00
61.00
5.13
1.74
0.00
62.00
5.13
1.74
0.00
63.00
5.13
1.74
0.00
64.00
5.13
1.74
0.00
65.00
5.13
1.74
0.00
66.00
5.13
1.74
0.00
67.00
5.13
1.74
0.00
68.00
5.13
1.74
0.00
69.00
5.13
1.74
0.00
70.00
5.13
1.74
0.00
71.00
5.13
1.74
0.00
72.00
5.13
1.74
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 119
Summary for Subcatchment PRE-POI#3: Pre -Development P0I#3
Runoff = 13.71 cfs @ 12.14 hrs, Volume= 1.073 af, Depth= 1.82"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 Year Rainfall=5.13"
Area (ac) CN
Description
6.950 65
Woods/grass comb., Fair, HSG B
0.137 98
Paved roads w/curbs & sewers, HSG B
7.087 66
Weighted Average
6.950
98.07% Pervious Area
0.137
1.93% Impervious Area
Tc Length
Slope Velocity Capacity Description
(min) (feet)
(ft/ft) (ft/sec) (cfs)
20.0
Direct Entry,
Subcatchment PRE-POI#3: Pre -Development P0I#3
Hydrograph
15
14
13.71
cfs
ILILILIL
13
1-I
_tItItitit
12
11
14 1 1 1 J_
10
�9
717ITITIT
� 8
0
4 141+1+I4-
LL
6
IIIIIIIII
5
I_tItItIfi
4
3
IL1 1LIL
2
rtl�lfi
_LI LI LI L I-1 lrY ilv� 4lli�
fil t-I O `V��_rtllll1ln6116i&114'�
�_I �_I tluhbff-lAi*aO-7-D87 Ad
TI T_f�"O# Yolum��1 f�
�I �I �I �qnIrI e�
c= 0 nun
IIIIIIIIIIIIII��L
t-I�__IHIHHHIIt
LILILI LI-1I-I-111IL
fil �_I r_I r_1 I_1 Irt Irt Irt I rt
6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 120
Hydrograph for Subcatchment PRE-POI#3: Pre -Development POI#3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.05
0.00
0.00
2.00
0.11
0.00
0.00
3.00
0.18
0.00
0.00
4.00
0.25
0.00
0.00
5.00
0.32
0.00
0.00
6.00
0.41
0.00
0.00
7.00
0.51
0.00
0.00
8.00
0.62
0.00
0.00
9.00
0.75
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.01
0.06
12.00
3.40
0.75
8.27
13.00
3.96
1.06
1.71
14.00
4.21
1.21
0.97
15.00
4.38
1.32
0.74
16.00
4.51
1.41
0.59
17.00
4.63
1.48
0.51
18.00
4.72
1.54
0.45
19.00
4.81
1.60
0.40
20.00
4.88
1.65
0.34
21.00
4.95
1.69
0.31
22.00
5.01
1.74
0.30
23.00
5.07
1.78
0.29
24.00
5.13
1.82
0.28
25.00
5.13
1.82
0.00
26.00
5.13
1.82
0.00
27.00
5.13
1.82
0.00
28.00
5.13
1.82
0.00
29.00
5.13
1.82
0.00
30.00
5.13
1.82
0.00
31.00
5.13
1.82
0.00
32.00
5.13
1.82
0.00
33.00
5.13
1.82
0.00
34.00
5.13
1.82
0.00
35.00
5.13
1.82
0.00
36.00
5.13
1.82
0.00
37.00
5.13
1.82
0.00
38.00
5.13
1.82
0.00
39.00
5.13
1.82
0.00
40.00
5.13
1.82
0.00
41.00
5.13
1.82
0.00
42.00
5.13
1.82
0.00
43.00
5.13
1.82
0.00
44.00
5.13
1.82
0.00
45.00
5.13
1.82
0.00
46.00
5.13
1.82
0.00
47.00
5.13
1.82
0.00
48.00
5.13
1.82
0.00
49.00
5.13
1.82
0.00
50.00
5.13
1.82
0.00
51.00
5.13
1.82
0.00
52.00
5.13
1.82
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.13
1.82
0.00
54.00
5.13
1.82
0.00
55.00
5.13
1.82
0.00
56.00
5.13
1.82
0.00
57.00
5.13
1.82
0.00
58.00
5.13
1.82
0.00
59.00
5.13
1.82
0.00
60.00
5.13
1.82
0.00
61.00
5.13
1.82
0.00
62.00
5.13
1.82
0.00
63.00
5.13
1.82
0.00
64.00
5.13
1.82
0.00
65.00
5.13
1.82
0.00
66.00
5.13
1.82
0.00
67.00
5.13
1.82
0.00
68.00
5.13
1.82
0.00
69.00
5.13
1.82
0.00
70.00
5.13
1.82
0.00
71.00
5.13
1.82
0.00
72.00
5.13
1.82
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 121
Summary for Subcatchment PRE-POI#4: Pre -Development P0I#4
Runoff = 5.88 cfs @ 12.09 hrs, Volume= 0.402 af, Depth= 1.89"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 Year Rainfall=5.13"
Area (ac) CN Description
2.410 65 Woods/grass comb., Fair, HSG B
0.135 98 Paved parking, HSG B
2.545 67 Weighted Average
2.410 94.70% Pervious Area
0.135 5.30% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
15.9 Direct Entry,
Subcatchment PRE-POI#4: Pre -Development P0I#4
Hydrograph
1 I I I I I I I I I I I I I I I I I I I I I I I I, I I
6 5.88 cfs
5
1 11 1 1 1 1 IRluhbff JAM-d&2-545 Ad
4' III III I I —off Yo y���
�I �I �I ��nl°IDe� h��-1.189�'I
3 �c 5.9 min
II'IIIIIIIIIIIIIIIIIIII�L�
2 II III IIII IIIIIIIIII IIIII II
1
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 122
Hydrograph for Subcatchment PRE-POI#4: Pre -Development POI#4
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.05
0.00
0.00
2.00
0.11
0.00
0.00
3.00
0.18
0.00
0.00
4.00
0.25
0.00
0.00
5.00
0.32
0.00
0.00
6.00
0.41
0.00
0.00
7.00
0.51
0.00
0.00
8.00
0.62
0.00
0.00
9.00
0.75
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.01
0.04
12.00
3.40
0.80
4.43
13.00
3.96
1.12
0.59
14.00
4.21
1.27
0.35
15.00
4.38
1.38
0.27
16.00
4.51
1.47
0.21
17.00
4.63
1.55
0.19
18.00
4.72
1.61
0.17
19.00
4.81
1.67
0.14
20.00
4.88
1.72
0.12
21.00
4.95
1.77
0.11
22.00
5.01
1.81
0.11
23.00
5.07
1.85
0.11
24.00
5.13
1.89
0.10
25.00
5.13
1.89
0.00
26.00
5.13
1.89
0.00
27.00
5.13
1.89
0.00
28.00
5.13
1.89
0.00
29.00
5.13
1.89
0.00
30.00
5.13
1.89
0.00
31.00
5.13
1.89
0.00
32.00
5.13
1.89
0.00
33.00
5.13
1.89
0.00
34.00
5.13
1.89
0.00
35.00
5.13
1.89
0.00
36.00
5.13
1.89
0.00
37.00
5.13
1.89
0.00
38.00
5.13
1.89
0.00
39.00
5.13
1.89
0.00
40.00
5.13
1.89
0.00
41.00
5.13
1.89
0.00
42.00
5.13
1.89
0.00
43.00
5.13
1.89
0.00
44.00
5.13
1.89
0.00
45.00
5.13
1.89
0.00
46.00
5.13
1.89
0.00
47.00
5.13
1.89
0.00
48.00
5.13
1.89
0.00
49.00
5.13
1.89
0.00
50.00
5.13
1.89
0.00
51.00
5.13
1.89
0.00
52.00
5.13
1.89
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.13
1.89
0.00
54.00
5.13
1.89
0.00
55.00
5.13
1.89
0.00
56.00
5.13
1.89
0.00
57.00
5.13
1.89
0.00
58.00
5.13
1.89
0.00
59.00
5.13
1.89
0.00
60.00
5.13
1.89
0.00
61.00
5.13
1.89
0.00
62.00
5.13
1.89
0.00
63.00
5.13
1.89
0.00
64.00
5.13
1.89
0.00
65.00
5.13
1.89
0.00
66.00
5.13
1.89
0.00
67.00
5.13
1.89
0.00
68.00
5.13
1.89
0.00
69.00
5.13
1.89
0.00
70.00
5.13
1.89
0.00
71.00
5.13
1.89
0.00
72.00
5.13
1.89
0.00

Weddington Acres HydroCAD Revised Layout Type 11 24-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 123
Summary for Pond DET POND-1: Detention Pond #1
Inflow Area = 16.500 ac, 18.59% Impervious, Inflow Depth = 1.82" for 10 Year event
Inflow = 27.34 cfs @ 12.21 hrs, Volume= 2.498 of
Outflow = 8.57 cfs @ 12.67 hrs, Volume= 2.188 af, Atten= 69%, Lag= 27.6 min
Primary = 8.57 cfs @ 12.67 hrs, Volume= 2.188 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Peak Elev= 712.52' @ 12.67 hrs Surf.Area= 14,913 sf Storage= 41,624 cf
Plug -Flow detention time= 396.2 min calculated for 2.188 of (88% of inflow)
Center -of -Mass det. time= 335.2 min ( 1,206.7 - 871.5 )
Volume Invert Avail.Storage Storage Description
#1 708.00' 104,832 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
708.00 2,289 0 0
709.00 5,540 3,915 3,915
710.00 8,705 7,123 11,037
711.00 11,744 10,225 21,262
712.00 14,012 12,878 34,140
713.00 15,752 14,882 49,022
714.00 17,548 16,650 65,672
715.00 19,401 18,475 84,146
716.00 21,970 20,686 104,832
Device Routing Invert Outlet Devices
#1 Primary 707.00' 36.0" Round Culvert
L= 111.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 707.00' / 705.00' S= 0.0180 '/' Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 7.07 sf
#2 Device 1 708.00' 1.3" Vert. WQ C= 0.600
#3 Device 1 711.33' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 2.67
Width (feet) 2.00 2.00
#4 Device 1 714.00' 48.0" x 48.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 715.00' 18.0' long x 18.0' 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) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Primary OutFlow Max=8.55 cfs @ 12.67 hrs HW=712.52' (Free Discharge)
L1=Culvert (Passes 8.55 cfs of 68.21 cfs potential flow)
2=WQ (Orifice Controls 0.09 cfs @ 10.17 fps)
3=Custom Weir/Orifice (Weir Controls 8.46 cfs @ 3.57 fps)
4=Orifi ce/G rate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=708.00' (Free Discharge)
L5= Broad -Crested Rectangular Weir( Controls 0.00 cfs)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 124
Pond DET POND-1: Detention Pond #1
Hydrograph
1t 1 1
1 t I
tI
I-
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H
I t I tI 1-4 1 t I t-I
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27.34 cfs
1 + I
H
4
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30
28
/
1 T I
I T
t-J
I
Z I
P
Peek EleVl=712.52'
/
1
1 1
I 1
F1
�S Qrage= 1i,��4�rfj
24
22I_I
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20
18
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18
0 14
FL:
/
4W
H
14
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12
10
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IIIIIIIIIIIIIIIIIIIIII
1 1 /////////////////////////////////////////////////�//////
Pond DET POND-1: Detention Pond #1
Stage -Discharge
716
/I
715
714
Custom WeirP
1
•
1:
1
1
60 80 100 120 140
Discharge (cfs)
ME
❑ Total
❑ Primary
❑ Secondary

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 125
m
713
d
c 712
d
w 711
708 Q
0
Pond DET POND-1: Detention Pond #1
Stage -Area -Storage
Surface/HorizontaiMetted Area (sq-ft)
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000
40,000 50,000 60,000 70,000 80,000 90,000 100,000
Storage (cubic -feet)
Surface
❑ Storage

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 126
Hydrograph for Pond DET POND-1: Detention Pond #1
Time
Inflow
Storage
Elevation
Outflow
Primary
Secondary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
(cfs)
(cfs)
0.00
0.00
0
708.00
0.00
0.00
0.00
2.50
0.00
0
708.00
0.00
0.00
0.00
5.00
0.00
0
708.00
0.00
0.00
0.00
7.50
0.00
0
708.00
0.00
0.00
0.00
10.00
0.00
0
708.00
0.00
0.00
0.00
12.50
13.17
40,171
712.42
7.54
7.54
0.00
15.00
1.76
31,228
711.79
2.12
2.12
0.00
17.50
1.13
29,290
711.64
1.24
1.24
0.00
20.00
0.80
28,433
711.58
0.90
0.90
0.00
22.50
0.70
27,937
711.54
0.72
0.72
0.00
25.00
0.01
26,761
711.45
0.35
0.35
0.00
27.50
0.00
25,284
711.33
0.08
0.08
0.00
30.00
0.00
24,564
711.27
0.08
0.08
0.00
32.50
0.00
23,850
711.22
0.08
0.08
0.00
35.00
0.00
23,144
711.16
0.08
0.08
0.00
37.50
0.00
22,443
711.10
0.08
0.08
0.00
40.00
0.00
21,749
711.04
0.08
0.08
0.00
42.50
0.00
21,062
710.98
0.08
0.08
0.00
45.00
0.00
20,382
710.92
0.08
0.08
0.00
47.50
0.00
19,709
710.87
0.07
0.07
0.00
50.00
0.00
19,043
710.81
0.07
0.07
0.00
52.50
0.00
18,384
710.75
0.07
0.07
0.00
55.00
0.00
17,732
710.69
0.07
0.07
0.00
57.50
0.00
17,088
710.63
0.07
0.07
0.00
60.00
0.00
16,451
710.57
0.07
0.07
0.00
62.50
0.00
15,822
710.50
0.07
0.07
0.00
65.00
0.00
15,200
710.44
0.07
0.07
0.00
67.50
0.00
14,587
710.38
0.07
0.07
0.00
70.00
0.00
13,982
710.32
0.07
0.07
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 127
Stage -Discharge for Pond DET POND-1: Detention Pond #1
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
708.00
0.00
0.00
0.00
708.10
0.01
0.01
0.00
708.20
0.02
0.02
0.00
708.30
0.02
0.02
0.00
708.40
0.03
0.03
0.00
708.50
0.03
0.03
0.00
708.60
0.03
0.03
0.00
708.70
0.04
0.04
0.00
708.80
0.04
0.04
0.00
708.90
0.04
0.04
0.00
709.00
0.04
0.04
0.00
709.10
0.05
0.05
0.00
709.20
0.05
0.05
0.00
709.30
0.05
0.05
0.00
709.40
0.05
0.05
0.00
709.50
0.05
0.05
0.00
709.60
0.06
0.06
0.00
709.70
0.06
0.06
0.00
709.80
0.06
0.06
0.00
709.90
0.06
0.06
0.00
710.00
0.06
0.06
0.00
710.10
0.06
0.06
0.00
710.20
0.07
0.07
0.00
710.30
0.07
0.07
0.00
710.40
0.07
0.07
0.00
710.50
0.07
0.07
0.00
710.60
0.07
0.07
0.00
710.70
0.07
0.07
0.00
710.80
0.07
0.07
0.00
710.90
0.07
0.07
0.00
711.00
0.08
0.08
0.00
711.10
0.08
0.08
0.00
711.20
0.08
0.08
0.00
711.30
0.08
0.08
0.00
711.40
0.20
0.20
0.00
711.50
0.54
0.54
0.00
711.60
1.00
1.00
0.00
711.70
1.56
1.56
0.00
711.80
2.20
2.20
0.00
711.90
2.91
2.91
0.00
712.00
3.68
3.68
0.00
712.10
4.51
4.51
0.00
712.20
5.41
5.41
0.00
712.30
6.35
6.35
0.00
712.40
7.34
7.34
0.00
712.50
8.38
8.38
0.00
712.60
9.47
9.47
0.00
712.70
10.60
10.60
0.00
712.80
11.77
11.77
0.00
712.90
12.98
12.98
0.00
713.00
14.23
14.23
0.00
713.10
15.52
15.52
0.00
713.20
16.85
16.85
0.00
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
713.30
18.21
18.21
0.00
713.40
19.61
19.61
0.00
713.50
21.04
21.04
0.00
713.60
22.51
22.51
0.00
713.70
24.00
24.00
0.00
713.80
25.53
25.53
0.00
713.90
27.09
27.09
0.00
714.00
28.68
28.68
0.00
714.10
31.75
31.75
0.00
714.20
36.05
36.05
0.00
714.30
41.16
41.16
0.00
714.40
46.92
46.92
0.00
714.50
53.26
53.26
0.00
714.60
60.12
60.12
0.00
714.70
67.44
67.44
0.00
714.80
75.20
75.20
0.00
714.90
83.38
83.38
0.00
715.00
86.77
86.77
0.00
715.10
88.96
87.44
1.53
715.20
92.41
88.10
4.31
715.30
96.71
88.75
7.96
715.40
101.70
89.40
12.29
715.50
107.23
90.05
17.18
715.60
113.28
90.69
22.59
715.70
119.47
91.33
28.15
715.80
125.96
91.96
34.00
715.90
133.08
92.59
40.50
716.00
140.55
93.21
47.34

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 128
Stage -Area -Storage for Pond DET POND-1: Detention Pond #1
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
708.00
2,289
0
708.10
2,614
245
708.20
2,939
523
708.30
3,264
833
708.40
3,589
1,176
708.50
3,915
1,551
708.60
4,240
1,959
708.70
4,565
2,399
708.80
4,890
2,872
708.90
5,215
3,377
709.00
5,540
3,915
709.10
5,857
4,484
709.20
6,173
5,086
709.30
6,489
5,719
709.40
6,806
6,384
709.50
7,123
7,080
709.60
7,439
7,808
709.70
7,756
8,568
709.80
8,072
9,359
709.90
8,388
10,182
710.00
8,705
11,037
710.10
9,009
11,923
710.20
9,313
12,839
710.30
9,617
13,785
710.40
9,921
14,762
710.50
10,225
15,769
710.60
10,528
16,807
710.70
10,832
17,875
710.80
11,136
18,973
710.90
11,440
20,102
711.00
11,744
21,262
711.10
11,971
22,447
711.20
12,198
23,656
711.30
12,424
24,887
711.40
12,651
26,141
711.50
12,878
27,417
711.60
13,105
28,716
711.70
13,332
30,038
711.80
13,558
31,382
711.90
13,785
32,750
712.00
14,012
34,140
712.10
14,186
35,549
712.20
14,360
36,977
712.30
14,534
38,421
712.40
14,708
39,883
712.50
14,882
41,363
712.60
15,056
42,860
712.70
15,230
44,374
712.80
15,404
45,906
712.90
15,578
47,455
713.00
15,752
49,022
713.10
15,932
50,606
713.20
16,111
52,208
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
713.30
16,291
53,828
713.40
16,470
55,466
713.50
16,650
57,122
713.60
16,830
58,796
713.70
17,009
60,488
713.80
17,189
62,198
713.90
17,368
63,926
714.00
17,548
65,672
714.10
17,733
67,436
714.20
17,919
69,218
714.30
18,104
71,019
714.40
18,289
72,839
714.50
18,475
74,677
714.60
18,660
76,534
714.70
18,845
78,409
714.80
19,030
80,303
714.90
19,216
82,215
715.00
19,401
84,146
715.10
19,658
86,099
715.20
19,915
88,078
715.30
20,172
90,082
715.40
20,429
92,112
715.50
20,686
94,168
715.60
20,942
96,249
715.70
21,199
98,356
715.80
21,456
100,489
715.90
21,713
102,647
716.00
21,970
104,832

Weddington Acres HydroCAD Revised Layout Type 11 24-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 129
Summary for Pond DET POND-2: Detention Pond #2
Inflow Area = 5.248 ac, 29.12% Impervious, Inflow Depth = 2.22" for 10 Year event
Inflow = 17.00 cfs @ 12.03 hrs, Volume= 0.969 of
Outflow = 5.52 cfs @ 12.22 hrs, Volume= 0.951 af, Atten= 68%, Lag= 11.6 min
Primary = 5.52 cfs @ 12.22 hrs, Volume= 0.951 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Peak Elev= 699.70' @ 12.22 hrs Surf.Area= 7,849 sf Storage= 16,234 cf
Plug -Flow detention time= 467.0 min calculated for 0.951 of (98% of inflow)
Center -of -Mass det. time= 455.9 min ( 1,301.0 - 845.1 )
Volume Invert Avail.Storage Storage Description
#1 697.00' 49,496 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
697.00 3,325 0 0
698.00 5,881 4,603 4,603
699.00 6,979 6,430 11,033
700.00 8,219 7,599 18,632
701.00 9,671 8,945 27,577
702.00 11,155 10,413 37,990
703.00 11,857 11,506 49,496
Device Routing Invert Outlet Devices
#1 Primary 696.00' 24.0" Round RCP -Round 24"
L= 66.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 696.00' / 695.00' S= 0.0152 '/' Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 3.14 sf
#2 Device 1 697.00' 1.5" Vert. WQ C= 0.600
#3 Device 1 698.82' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 2.18
Width (feet) 2.00 2.00
#4 Device 1 701.00' 48.0" x 48.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 702.00' 10.0' 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=5.45 cfs @ 12.22 hrs HW=699.69' (Free Discharge)
L1=RCP_Round 24" (Passes 5.45 cfs of 24.83 cfs potential flow)
2=WQ (Orifice Controls 0.10 cfs @ 7.81 fps)
3=Custom Weir/Orifice (Weir Controls 5.35 cfs @ 3.06 fps)
4=Orifi ce/G rate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=697.00' (Free Discharge)
L5= Broad -Crested Rectangular Weir( Controls 0.00 cfs)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 130
Pond DET POND-2: Detention Pond #2
Hydrograph
I LIII1-1 I_ILI Q I_I:EI I-1I1IEI II
17. 11cfs
NakI : it ° r it
• . • • 1
I
1
/ J
I
Pond DET POND-2: Detention Pond #2
Stage -Discharge
0 5 10 15 20 25 30 35 40 45 50 55 60
Discharge (cfs)
LInflow
wrydary
■ Total
■ Primary
■ Secondary

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 131
Pond DET POND-2: Detention Pond #2
Stage -Area -Storage
Surface/Horizontal/Wetted Area (sq-ft)
1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000
Storage (cubic -feet)
Surface
❑ Storage

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 132
Hydrograph for Pond DET POND-2: Detention Pond #2
Time
Inflow
Storage
Elevation
Outflow
Primary
Secondary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
(cfs)
(cfs)
0.00
0.00
0
697.00
0.00
0.00
0.00
2.50
0.00
0
697.00
0.00
0.00
0.00
5.00
0.00
0
697.00
0.00
0.00
0.00
7.50
0.00
0
697.00
0.00
0.00
0.00
10.00
0.04
29
697.01
0.00
0.00
0.00
12.50
2.27
14,776
699.51
3.87
3.87
0.00
15.00
0.60
11,177
699.02
0.67
0.67
0.00
17.50
0.39
10,736
698.96
0.42
0.42
0.00
20.00
0.27
10,500
698.92
0.30
0.30
0.00
22.50
0.24
10,381
698.91
0.25
0.25
0.00
25.00
0.00
9,901
698.84
0.10
0.10
0.00
27.50
0.00
9,192
698.73
0.08
0.08
0.00
30.00
0.00
8,516
698.63
0.07
0.07
0.00
32.50
0.00
7,861
698.53
0.07
0.07
0.00
35.00
0.00
7,228
698.43
0.07
0.07
0.00
37.50
0.00
6,618
698.33
0.07
0.07
0.00
40.00
0.00
6,030
698.24
0.06
0.06
0.00
42.50
0.00
5,465
698.14
0.06
0.06
0.00
45.00
0.00
4,924
698.05
0.06
0.06
0.00
47.50
0.00
4,406
697.97
0.06
0.06
0.00
50.00
0.00
3,913
697.88
0.05
0.05
0.00
52.50
0.00
3,445
697.79
0.05
0.05
0.00
55.00
0.00
3,004
697.71
0.05
0.05
0.00
57.50
0.00
2,590
697.63
0.04
0.04
0.00
60.00
0.00
2,205
697.55
0.04
0.04
0.00
62.50
0.00
1,850
697.47
0.04
0.04
0.00
65.00
0.00
1,526
697.40
0.03
0.03
0.00
67.50
0.00
1,235
697.33
0.03
0.03
0.00
70.00
0.00
978
697.27
0.03
0.03
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 133
Stage -Discharge for Pond DET POND-2: Detention Pond #2
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
697.00
0.00
0.00
0.00
697.10
0.01
0.01
0.00
697.20
0.02
0.02
0.00
697.30
0.03
0.03
0.00
697.40
0.03
0.03
0.00
697.50
0.04
0.04
0.00
697.60
0.04
0.04
0.00
697.70
0.05
0.05
0.00
697.80
0.05
0.05
0.00
697.90
0.05
0.05
0.00
698.00
0.06
0.06
0.00
698.10
0.06
0.06
0.00
698.20
0.06
0.06
0.00
698.30
0.07
0.07
0.00
698.40
0.07
0.07
0.00
698.50
0.07
0.07
0.00
698.60
0.07
0.07
0.00
698.70
0.08
0.08
0.00
698.80
0.08
0.08
0.00
698.90
0.23
0.23
0.00
699.00
0.58
0.58
0.00
699.10
1.05
1.05
0.00
699.20
1.62
1.62
0.00
699.30
2.27
2.27
0.00
699.40
2.98
2.98
0.00
699.50
3.77
3.77
0.00
699.60
4.61
4.61
0.00
699.70
5.50
5.50
0.00
699.80
6.45
6.45
0.00
699.90
7.45
7.45
0.00
700.00
8.50
8.50
0.00
700.10
9.59
9.59
0.00
700.20
10.72
10.72
0.00
700.30
11.90
11.90
0.00
700.40
13.12
13.12
0.00
700.50
14.37
14.37
0.00
700.60
15.67
15.67
0.00
700.70
17.00
17.00
0.00
700.80
18.36
18.36
0.00
700.90
19.76
19.76
0.00
701.00
21.20
21.20
0.00
701.10
24.12
24.12
0.00
701.20
28.26
28.26
0.00
701.30
31.37
31.37
0.00
701.40
31.73
31.73
0.00
701.50
32.09
32.09
0.00
701.60
32.44
32.44
0.00
701.70
32.79
32.79
0.00
701.80
33.14
33.14
0.00
701.90
33.48
33.48
0.00
702.00
33.82
33.82
0.00
702.10
34.95
34.16
0.79
702.20
36.72
34.49
2.23
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
702.30
38.97
34.82
4.15
702.40
41.63
35.15
6.48
702.50
44.77
35.48
9.30
702.60
48.34
35.80
12.55
702.70
51.90
36.11
15.78
702.80
55.68
36.43
19.25
702.90
59.67
36.74
22.92
703.00
63.85
37.05
26.80

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 134
Stage -Area -Storage for Pond DET POND-2: Detention Pond #2
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
697.00
3,325
0
697.10
3,581
345
697.20
3,836
716
697.30
4,092
1,113
697.40
4,347
1,534
697.50
4,603
1,982
697.60
4,859
2,455
697.70
5,114
2,954
697.80
5,370
3,478
697.90
5,625
4,028
698.00
5,881
4,603
698.10
5,991
5,197
698.20
6,101
5,801
698.30
6,210
6,417
698.40
6,320
7,043
698.50
6,430
7,681
698.60
6,540
8,329
698.70
6,650
8,989
698.80
6,759
9,659
698.90
6,869
10,341
699.00
6,979
11,033
699.10
7,103
11,737
699.20
7,227
12,454
699.30
7,351
13,182
699.40
7,475
13,924
699.50
7,599
14,678
699.60
7,723
15,444
699.70
7,847
16,222
699.80
7,971
17,013
699.90
8,095
17,816
700.00
8,219
18,632
700.10
8,364
19,461
700.20
8,509
20,305
700.30
8,655
21,163
700.40
8,800
22,036
700.50
8,945
22,923
700.60
9,090
23,825
700.70
9,235
24,741
700.80
9,381
25,672
700.90
9,526
26,617
701.00
9,671
27,577
701.10
9,819
28,552
701.20
9,968
29,541
701.30
10,116
30,545
701.40
10,265
31,564
701.50
10,413
32,598
701.60
10,561
33,647
701.70
10,710
34,710
701.80
10,858
35,789
701.90
11,007
36,882
702.00
11,155
37,990
702.10
11,225
39,109
702.20
11,295
40,235
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
702.30
11,366
41,368
702.40
11,436
42,508
702.50
11,506
43,655
702.60
11,576
44,809
702.70
11,646
45,970
702.80
11,717
47,139
702.90
11,787
48,314
703.00
11,857
49,496

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 135
Summary for Link 4L: Pre -Development POI
Inflow Area = 36.865 ac, 0.00% Impervious, Inflow Depth = 1.19" for 10 Year event
Inflow = 38.27 cfs @ 12.18 hrs, Volume= 3.655 of
Primary = 38.27 cfs @ 12.18 hrs, Volume= 3.655 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Link 4L: Pre -Development POI
Hydrograph
4— I
t I
H
H
d
+
❑Inflow
❑Primary
40
38.27 cfs
�
� _
��" J3 6 IC
38
36
J_I
W
j 14
t-1
1--t
4 I_�_ I
t-
34
32
H
H
I-+
I-� I+I
-I
CI
H
IC
I+1+1
�
30
28
26
24
22
-1
J_ I
�_I
�_j
14 1 1
4-1
�_I
�_j
14
1 1 1
0 20
16
-
HI4141
1�-lHHH1414114
Ifil�l
tI_�
ItItIil
-
I
��
I t I t I
t
12
10
8
6
1 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 41 42 44 46 48 50 52 54 56 58 61 62 64 66 68 70 7-2

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 136
Hydrograph for Link 4L: Pre -Development POI
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.00
0.00
0.00
2.00
0.00
0.00
0.00
3.00
0.00
0.00
0.00
4.00
0.00
0.00
0.00
5.00
0.00
0.00
0.00
6.00
0.00
0.00
0.00
7.00
0.00
0.00
0.00
8.00
0.00
0.00
0.00
9.00
0.00
0.00
0.00
10.00
0.00
0.00
0.00
11.00
0.00
0.00
0.00
12.00
16.91
0.00
16.91
13.00
6.77
0.00
6.77
14.00
3.80
0.00
3.80
15.00
2.92
0.00
2.92
16.00
2.36
0.00
2.36
17.00
2.03
0.00
2.03
18.00
1.83
0.00
1.83
19.00
1.61
0.00
1.61
20.00
1.38
0.00
1.38
21.00
1.28
0.00
1.28
22.00
1.24
0.00
1.24
23.00
1.20
0.00
1.20
24.00
1.16
0.00
1.16
25.00
0.01
0.00
0.01
26.00
0.00
0.00
0.00
27.00
0.00
0.00
0.00
28.00
0.00
0.00
0.00
29.00
0.00
0.00
0.00
30.00
0.00
0.00
0.00
31.00
0.00
0.00
0.00
32.00
0.00
0.00
0.00
33.00
0.00
0.00
0.00
34.00
0.00
0.00
0.00
35.00
0.00
0.00
0.00
36.00
0.00
0.00
0.00
37.00
0.00
0.00
0.00
38.00
0.00
0.00
0.00
39.00
0.00
0.00
0.00
40.00
0.00
0.00
0.00
41.00
0.00
0.00
0.00
42.00
0.00
0.00
0.00
43.00
0.00
0.00
0.00
44.00
0.00
0.00
0.00
45.00
0.00
0.00
0.00
46.00
0.00
0.00
0.00
47.00
0.00
0.00
0.00
48.00
0.00
0.00
0.00
49.00
0.00
0.00
0.00
50.00
0.00
0.00
0.00
51.00
0.00
0.00
0.00
52.00
0.00
0.00
0.00
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.00
0.00
0.00
54.00
0.00
0.00
0.00
55.00
0.00
0.00
0.00
56.00
0.00
0.00
0.00
57.00
0.00
0.00
0.00
58.00
0.00
0.00
0.00
59.00
0.00
0.00
0.00
60.00
0.00
0.00
0.00
61.00
0.00
0.00
0.00
62.00
0.00
0.00
0.00
63.00
0.00
0.00
0.00
64.00
0.00
0.00
0.00
65.00
0.00
0.00
0.00
66.00
0.00
0.00
0.00
67.00
0.00
0.00
0.00
68.00
0.00
0.00
0.00
69.00
0.00
0.00
0.00
70.00
0.00
0.00
0.00
71.00
0.00
0.00
0.00
72.00
0.00
0.00
0.00

Weddington Acres HydroCAD Revised Layout Type 11 24-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 137
Summary for Link P0I#1: Post -Development P0I#1
Inflow Area = 42.987 ac, 10.69% Impervious, Inflow Depth > 1.55" for 10 Year event
Inflow = 32.32 cfs @ 12.17 hrs, Volume= 5.537 of
Primary = 32.32 cfs @ 12.17 hrs, Volume= 5.537 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Link P0I#1: Post -Development P0I#1
Hydrograph
I J 1 T 1 F 1 F_ ❑Inflow
32.32 cfs ❑Primary
inf "44i "" A42.9�87 ac
�- �Ifil H R H Irtl�lfil H H H Irtlrtlfi
30-
28
26
t I t_1
H
I rt
I rt I t I
t I
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H
1--t t t
24
22
1H
H
ICI_tItItIH
H
HI i
20
18
fi 1 fi I HI
H
I H
I H I H I
H I
HI
H
3
LL1
14
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H
H
IH
I
H
H
H
i� �
12
�IHH-4141�-14-1HH1-4141414-
10
8
1 1 1 H
H
4
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H
H
H I-LI+I -L
6-
4
2
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 10 Year Rainfall=5.13"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 138
Hydrograph for Link P0I#1: Post -Development P0I#1
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.00
0.00
0.00
2.00
0.00
0.00
0.00
3.00
0.00
0.00
0.00
4.00
0.00
0.00
0.00
5.00
0.00
0.00
0.00
6.00
0.00
0.00
0.00
7.00
0.00
0.00
0.00
8.00
0.00
0.00
0.00
9.00
0.00
0.00
0.00
10.00
0.00
0.00
0.00
11.00
0.02
0.00
0.02
12.00
13.50
0.00
13.50
13.00
13.27
0.00
13.27
14.00
6.67
0.00
6.67
15.00
4.64
0.00
4.64
16.00
3.66
0.00
3.66
17.00
3.05
0.00
3.05
18.00
2.70
0.00
2.70
19.00
2.38
0.00
2.38
20.00
2.06
0.00
2.06
21.00
1.86
0.00
1.86
22.00
1.77
0.00
1.77
23.00
1.70
0.00
1.70
24.00
1.63
0.00
1.63
25.00
0.46
0.00
0.46
26.00
0.24
0.00
0.24
27.00
0.17
0.00
0.17
28.00
0.16
0.00
0.16
29.00
0.15
0.00
0.15
30.00
0.15
0.00
0.15
31.00
0.15
0.00
0.15
32.00
0.15
0.00
0.15
33.00
0.15
0.00
0.15
34.00
0.15
0.00
0.15
35.00
0.15
0.00
0.15
36.00
0.15
0.00
0.15
37.00
0.14
0.00
0.14
38.00
0.14
0.00
0.14
39.00
0.14
0.00
0.14
40.00
0.14
0.00
0.14
41.00
0.14
0.00
0.14
42.00
0.14
0.00
0.14
43.00
0.14
0.00
0.14
44.00
0.14
0.00
0.14
45.00
0.13
0.00
0.13
46.00
0.13
0.00
0.13
47.00
0.13
0.00
0.13
48.00
0.13
0.00
0.13
49.00
0.13
0.00
0.13
50.00
0.13
0.00
0.13
51.00
0.13
0.00
0.13
52.00
0.12
0.00
0.12
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.12
0.00
0.12
54.00
0.12
0.00
0.12
55.00
0.12
0.00
0.12
56.00
0.12
0.00
0.12
57.00
0.12
0.00
0.12
58.00
0.11
0.00
0.11
59.00
0.11
0.00
0.11
60.00
0.11
0.00
0.11
61.00
0.11
0.00
0.11
62.00
0.11
0.00
0.11
63.00
0.11
0.00
0.11
64.00
0.10
0.00
0.10
65.00
0.10
0.00
0.10
66.00
0.10
0.00
0.10
67.00
0.10
0.00
0.10
68.00
0.10
0.00
0.10
69.00
0.10
0.00
0.10
70.00
0.09
0.00
0.09
71.00
0.09
0.00
0.09
72.00
0.09
0.00
0.09

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Paae 139
Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment IS: Pre #1 Runoff Area=9.570 ac 0.00% Impervious Runoff Depth=1.83"
Tc=18.5 min CN=58 Runoff=18.83 cfs 1.456 of
Subcatchment2S: Pre #2 Runoff Area=10.386 ac 0.00% Impervious Runoff Depth=1.99"
Tc=23.8 min CN=60 Runoff=19.48 cfs 1.726 of
Subcatchment3S: Pre #3 Runoff Area=16.909 ac 0.00% Impervious Runoff Depth=1.58"
Tc=23.6 min CN=55 Runoff=23.80 cfs 2.228 of
Subcatchment5S: By-Pass#2 Runoff Area=14.199 ac 0.00% Impervious Runoff Depth=1.99"
Tc=23.1 min CN=60 Runoff=27.13 cfs 2.359 of
Subcatchment6S: By-Pass#1 Runoff Area=7.040 ac 0.00% Impervious Runoff Depth=1.91"
Tc=18.5 min CN=59 Runoff=14.67 cfs 1.120 of
SubcatchmentPOI#2: Post -Development Runoff Area=1.540 ac 0.00% Impervious Runoff Depth=2.43"
Tc=17.6 min CN=65 Runoff=4.37 cfs 0.312 of
SubcatchmentPOI#3: Post -Development Runoff Area=4.635 ac 6.84% Impervious Runoff Depth=2.61"
Tc=14.9 min CN=67 Runoff=15.46 cfs 1.009 of
SubcatchmentPOI#4: Post -Development Runoff Area=1.796 ac 18.71% Impervious Runoff Depth=2.71"
Tc=25.5 min CN=68 Runoff=4.59 cfs 0.405 of
SubcatchmentPOND#1: Runoff Area=16.500 ac 18.59% Impervious Runoff Depth=2.52"
Tc=25.7 min CN=66 Runoff=38.87 cfs 3.468 of
SubcatchmentPOND#2: Post -Development Runoff Area=5.248 ac 29.12% Impervious Runoff Depth=2.99"
Tc=11.0 min CN=71 Runoff=22.98 cfs 1.307 of
Subcatchment PRE-POI#2: Pre -Development Runoff Area=4.456 ac 0.00% Impervious Runoff Depth=2.43"
Tc=18.4 min CN=65 Runoff=12.33 cfs 0.903 of
Subcatchment PRE-POI#3: Pre -Development Runoff Area=7.087 ac 1.93% Impervious Runoff Depth=2.52"
Tc=20.0 min CN=66 Runoff=19.43 cfs 1.489 of
Subcatchment PRE-POI#4: Pre -Development Runoff Area=2.545 ac 5.30% Impervious Runoff Depth=2.61"
Tc=15.9 min CN=67 Runoff=8.23 cfs 0.554 of
Pond DIET POND-1: Detention Pond #1 Peak EIev=713.20' Storage=52,238 cf Inflow=38.87 cfs 3.468 of
Primary=16.87 cfs 3.157 of Secondary=0.00 cfs 0.000 of Outflow=16.87 cfs 3.157 of
Pond DIET POND-2: Detention Pond #2 Peak EIev=700.19' Storage=20,252 cf Inflow=22.98 cfs 1.307 of
Primary=10.65 cfs 1.288 of Secondary=0.00 cfs 0.000 of Outflow=10.65 cfs 1.288 of
Link 4L: Pre-DevelopmentP01 Inflow=60.96 cfs 5.410 of
Primary=60.96 cfs 5.410 of

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 140
Link POI#1: Post-DevelopmentPO1#1
Inflow=53.45 cfs 7.924 of
Primary=53.45 cfs 7.924 of
Total Runoff Area = 101.911 ac Runoff Volume = 18.337 of Average Runoff Depth = 2.16"
94.58% Pervious = 96.390 ac 5.42% Impervious = 5.521 ac

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 141
Summary for Subcatchment 1S: Pre #1
Runoff = 18.83 cfs @ 12.13 hrs, Volume= 1.456 af, Depth= 1.83"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 25 Year Rainfall=6.1 1 "
Area (ac) CN Description
8.570 55 Woods, Good, HSG B
1.000 79 Woods/grass comb., Good, HSG D
9.570 58 Weighted Average
9.570 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.5 Direct Entry,
Subcatchment 1 S: Pre #1
Hydrograph
21
1T I— I—T
11
1 1 F-1 1
20 19
18
18.83 cfs
1-L I -L1
-1- 1
-LI
U
U U 1-1 Ip �1�-
17
k 1-4 k 4
14
1 14-1
�-1
�-I
ir` air �R1a n l� .h'
16
15
—
14
1 + 1 + 1
1-1
-1
H
Ru6bif-Atda�--9.l7Q zed
14
13
1 -�
I + I + I
j-1
-�-1
1--�yo# f41�5"f
010
rtl—l—l—l—lfit—I-I�nl�l�Icle7-9ILL
8
I I�
I
D
E1
E1 Cl 1� 1�8 min
7
6
�11-1�1�I�I
a 1-11-I�141
5
4
��i-�14-1�1�I�IN1-�14I41414-
L
3
2
I�4-
1
4- 1
-H
�—1
�—I IHI 14 I -+ 14
1
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 142
Hydrograph for Subcatchment 1S: Pre #1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.06
0.00
0.00
2.00
0.13
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.29
0.00
0.00
5.00
0.38
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.60
0.00
0.00
8.00
0.73
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.00
0.00
11.00
1.44
0.00
0.00
12.00
4.05
0.69
11.62
13.00
4.72
1.02
2.34
14.00
5.01
1.17
1.37
15.00
5.21
1.29
1.06
16.00
5.38
1.38
0.85
17.00
5.51
1.46
0.73
18.00
5.63
1.53
0.66
19.00
5.73
1.59
0.58
20.00
5.82
1.64
0.49
21.00
5.89
1.69
0.46
22.00
5.97
1.74
0.44
23.00
6.04
1.78
0.43
24.00
6.11
1.83
0.41
25.00
6.11
1.83
0.00
26.00
6.11
1.83
0.00
27.00
6.11
1.83
0.00
28.00
6.11
1.83
0.00
29.00
6.11
1.83
0.00
30.00
6.11
1.83
0.00
31.00
6.11
1.83
0.00
32.00
6.11
1.83
0.00
33.00
6.11
1.83
0.00
34.00
6.11
1.83
0.00
35.00
6.11
1.83
0.00
36.00
6.11
1.83
0.00
37.00
6.11
1.83
0.00
38.00
6.11
1.83
0.00
39.00
6.11
1.83
0.00
40.00
6.11
1.83
0.00
41.00
6.11
1.83
0.00
42.00
6.11
1.83
0.00
43.00
6.11
1.83
0.00
44.00
6.11
1.83
0.00
45.00
6.11
1.83
0.00
46.00
6.11
1.83
0.00
47.00
6.11
1.83
0.00
48.00
6.11
1.83
0.00
49.00
6.11
1.83
0.00
50.00
6.11
1.83
0.00
51.00
6.11
1.83
0.00
52.00
6.11
1.83
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.11
1.83
0.00
54.00
6.11
1.83
0.00
55.00
6.11
1.83
0.00
56.00
6.11
1.83
0.00
57.00
6.11
1.83
0.00
58.00
6.11
1.83
0.00
59.00
6.11
1.83
0.00
60.00
6.11
1.83
0.00
61.00
6.11
1.83
0.00
62.00
6.11
1.83
0.00
63.00
6.11
1.83
0.00
64.00
6.11
1.83
0.00
65.00
6.11
1.83
0.00
66.00
6.11
1.83
0.00
67.00
6.11
1.83
0.00
68.00
6.11
1.83
0.00
69.00
6.11
1.83
0.00
70.00
6.11
1.83
0.00
71.00
6.11
1.83
0.00
72.00
6.11
1.83
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 143
Summary for Subcatchment 2S: Pre #2
Runoff = 19.48 cfs @ 12.19 hrs, Volume= 1.726 af, Depth= 1.99"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 25 Year Rainfall=6.1 1 "
Area (ac) CN Description
8.386 55 Woods, Good, HSG B
2.000 79 Woods/grass comb., Good, HSG D
10.386 60 Weighted Average
10.386 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
23.8 Direct Entry,
21
1E
1E
17
1E
1E
14
12
w 12
3 11
0 1C
LL
Subcatchment 2S: Pre #2
Hydrograph
19.48cf1
titItItIt
4
1+1 +1
4-
1
1-11
1j
-IIIIIIIL
4
14
1--k1 _k1
_k
14
4141+1
14-
ICI
tltltitit
1-1
I-EITITIT
141__�1I-11-
fil �I
i �'66�ARI a--IntAl6j b.q'�
LI DFWnoCfflArdd='LD.R8BAd
I -_ I
--I P�� njr I P
ZZII--�
tI �I
�I r1 I� I-� �UV
LI EI
EI C7 171 17 I-T I-F I T
_�_I�_I�_I �_j1-11-4I__�141__�
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 144
Hydrograph for Subcatchment 2S: Pre #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.06
0.00
0.00
2.00
0.13
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.29
0.00
0.00
5.00
0.38
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.60
0.00
0.00
8.00
0.73
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.00
0.00
11.00
1.44
0.00
0.01
12.00
4.05
0.79
9.27
13.00
4.72
1.14
3.09
14.00
5.01
1.31
1.65
15.00
5.21
1.43
1.24
16.00
5.38
1.53
1.00
17.00
5.51
1.61
0.85
18.00
5.63
1.68
0.76
19.00
5.73
1.75
0.67
20.00
5.82
1.80
0.57
21.00
5.89
1.85
0.52
22.00
5.97
1.90
0.51
23.00
6.04
1.95
0.49
24.00
6.11
1.99
0.47
25.00
6.11
1.99
0.00
26.00
6.11
1.99
0.00
27.00
6.11
1.99
0.00
28.00
6.11
1.99
0.00
29.00
6.11
1.99
0.00
30.00
6.11
1.99
0.00
31.00
6.11
1.99
0.00
32.00
6.11
1.99
0.00
33.00
6.11
1.99
0.00
34.00
6.11
1.99
0.00
35.00
6.11
1.99
0.00
36.00
6.11
1.99
0.00
37.00
6.11
1.99
0.00
38.00
6.11
1.99
0.00
39.00
6.11
1.99
0.00
40.00
6.11
1.99
0.00
41.00
6.11
1.99
0.00
42.00
6.11
1.99
0.00
43.00
6.11
1.99
0.00
44.00
6.11
1.99
0.00
45.00
6.11
1.99
0.00
46.00
6.11
1.99
0.00
47.00
6.11
1.99
0.00
48.00
6.11
1.99
0.00
49.00
6.11
1.99
0.00
50.00
6.11
1.99
0.00
51.00
6.11
1.99
0.00
52.00
6.11
1.99
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.11
1.99
0.00
54.00
6.11
1.99
0.00
55.00
6.11
1.99
0.00
56.00
6.11
1.99
0.00
57.00
6.11
1.99
0.00
58.00
6.11
1.99
0.00
59.00
6.11
1.99
0.00
60.00
6.11
1.99
0.00
61.00
6.11
1.99
0.00
62.00
6.11
1.99
0.00
63.00
6.11
1.99
0.00
64.00
6.11
1.99
0.00
65.00
6.11
1.99
0.00
66.00
6.11
1.99
0.00
67.00
6.11
1.99
0.00
68.00
6.11
1.99
0.00
69.00
6.11
1.99
0.00
70.00
6.11
1.99
0.00
71.00
6.11
1.99
0.00
72.00
6.11
1.99
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 145
Summary for Subcatchment 3S: Pre #3
Runoff = 23.80 cfs @ 12.20 hrs, Volume= 2.228 af, Depth= 1.58"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 25 Year Rainfall=6.1 1 "
Area (ac) CN Description
11.470 55 Woods, Good, HSG B
5.439 56 Brush, Fair, HSG B
16.909 55 Weighted Average
16.909 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
23.6 Direct Entry,
Subcatchment 3S: Pre #3
Hydrograph
■ Runoff
2a
23.8o
cfs 11 1 1 1 1 11 11
22
I� I-1
L I I a�iRl�lmal
20
I� 11
111 t I t I t I t I t-I Rti nbff l�4 r"=1�6.909 Ord
18
16
1 I I I 1 I I I I I 1 I I�ygpf1'- 4q
3 14
I �I �I _1 �nIr e� h=1.,5 '
° 12
U.
10
I min
rt fi rt RCN—�
8
IIIIIIIIIIIIIIIIIIIIIIIIIIIII
6
+ I + 1 1-1 14 1 +
4
2
1
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 146
Hydrograph for Subcatchment 3S: Pre #3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.06
0.00
0.00
2.00
0.13
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.29
0.00
0.00
5.00
0.38
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.60
0.00
0.00
8.00
0.73
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.00
0.00
11.00
1.44
0.00
0.00
12.00
4.05
0.55
9.90
13.00
4.72
0.84
4.17
14.00
5.01
0.99
2.27
15.00
5.21
1.09
1.73
16.00
5.38
1.17
1.40
17.00
5.51
1.24
1.20
18.00
5.63
1.31
1.07
19.00
5.73
1.36
0.95
20.00
5.82
1.41
0.81
21.00
5.89
1.46
0.75
22.00
5.97
1.50
0.72
23.00
6.04
1.54
0.70
24.00
6.11
1.58
0.68
25.00
6.11
1.58
0.00
26.00
6.11
1.58
0.00
27.00
6.11
1.58
0.00
28.00
6.11
1.58
0.00
29.00
6.11
1.58
0.00
30.00
6.11
1.58
0.00
31.00
6.11
1.58
0.00
32.00
6.11
1.58
0.00
33.00
6.11
1.58
0.00
34.00
6.11
1.58
0.00
35.00
6.11
1.58
0.00
36.00
6.11
1.58
0.00
37.00
6.11
1.58
0.00
38.00
6.11
1.58
0.00
39.00
6.11
1.58
0.00
40.00
6.11
1.58
0.00
41.00
6.11
1.58
0.00
42.00
6.11
1.58
0.00
43.00
6.11
1.58
0.00
44.00
6.11
1.58
0.00
45.00
6.11
1.58
0.00
46.00
6.11
1.58
0.00
47.00
6.11
1.58
0.00
48.00
6.11
1.58
0.00
49.00
6.11
1.58
0.00
50.00
6.11
1.58
0.00
51.00
6.11
1.58
0.00
52.00
6.11
1.58
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.11
1.58
0.00
54.00
6.11
1.58
0.00
55.00
6.11
1.58
0.00
56.00
6.11
1.58
0.00
57.00
6.11
1.58
0.00
58.00
6.11
1.58
0.00
59.00
6.11
1.58
0.00
60.00
6.11
1.58
0.00
61.00
6.11
1.58
0.00
62.00
6.11
1.58
0.00
63.00
6.11
1.58
0.00
64.00
6.11
1.58
0.00
65.00
6.11
1.58
0.00
66.00
6.11
1.58
0.00
67.00
6.11
1.58
0.00
68.00
6.11
1.58
0.00
69.00
6.11
1.58
0.00
70.00
6.11
1.58
0.00
71.00
6.11
1.58
0.00
72.00
6.11
1.58
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 147
Summary for Subcatchment 5S: By -Pass #2
Runoff = 27.13 cfs @ 12.18 hrs, Volume= 2.359 af, Depth= 1.99"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 25 Year Rainfall=6.1 1 "
Area (ac) CN Description
11.999 58 Woods/grass comb., Good, HSG B
2.200 73 Brush, Good, HSG D
14.199 60 Weighted Average
14.199 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
23.1 Direct Entry,
Subcatchment 5S: By -Pass #2
Hydrograph
■ Runoff
28
26
24
27.13
17 1
-
cfs
�I �I �I I -I I� 1T/ 1p�e 11�1
-T 17 171 71 T 1 7-1 r1 `�a�rtRaln�fa�ll��.11_f'�
- - - - - - - - - - - - - -
22
I- 1 1
4 14 1- � I � 14-1 � I �I FLi nbff Ar=1-#.11-99 Ad
20- 18
1
1 1 1 1 1
1 17 1 T I I I I 1 1 1 1__F�499f1 YII4T�=�f3l "f
U 16
4 14 1 + 1 + 1 -1 -I H H �njrj.'.e� h?1.1111'j
0 14
U. 12
I_
'J nm n
I I I I 1 I I I I I 1 I I I I I H
10
I
tItItIfitfitt-It__I N 1-1IttItIt
8
6
I_L I _L I _L I LI LI LI LI U It Id I-i 111 _
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 148
Hydrograph for Subcatchment 5S: By -Pass #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.06
0.00
0.00
2.00
0.13
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.29
0.00
0.00
5.00
0.38
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.60
0.00
0.00
8.00
0.73
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.00
0.00
11.00
1.44
0.00
0.01
12.00
4.05
0.79
13.43
13.00
4.72
1.14
4.15
14.00
5.01
1.31
2.24
15.00
5.21
1.43
1.69
16.00
5.38
1.53
1.36
17.00
5.51
1.61
1.16
18.00
5.63
1.68
1.04
19.00
5.73
1.75
0.91
20.00
5.82
1.80
0.78
21.00
5.89
1.85
0.72
22.00
5.97
1.90
0.69
23.00
6.04
1.95
0.67
24.00
6.11
1.99
0.64
25.00
6.11
1.99
0.00
26.00
6.11
1.99
0.00
27.00
6.11
1.99
0.00
28.00
6.11
1.99
0.00
29.00
6.11
1.99
0.00
30.00
6.11
1.99
0.00
31.00
6.11
1.99
0.00
32.00
6.11
1.99
0.00
33.00
6.11
1.99
0.00
34.00
6.11
1.99
0.00
35.00
6.11
1.99
0.00
36.00
6.11
1.99
0.00
37.00
6.11
1.99
0.00
38.00
6.11
1.99
0.00
39.00
6.11
1.99
0.00
40.00
6.11
1.99
0.00
41.00
6.11
1.99
0.00
42.00
6.11
1.99
0.00
43.00
6.11
1.99
0.00
44.00
6.11
1.99
0.00
45.00
6.11
1.99
0.00
46.00
6.11
1.99
0.00
47.00
6.11
1.99
0.00
48.00
6.11
1.99
0.00
49.00
6.11
1.99
0.00
50.00
6.11
1.99
0.00
51.00
6.11
1.99
0.00
52.00
6.11
1.99
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.11
1.99
0.00
54.00
6.11
1.99
0.00
55.00
6.11
1.99
0.00
56.00
6.11
1.99
0.00
57.00
6.11
1.99
0.00
58.00
6.11
1.99
0.00
59.00
6.11
1.99
0.00
60.00
6.11
1.99
0.00
61.00
6.11
1.99
0.00
62.00
6.11
1.99
0.00
63.00
6.11
1.99
0.00
64.00
6.11
1.99
0.00
65.00
6.11
1.99
0.00
66.00
6.11
1.99
0.00
67.00
6.11
1.99
0.00
68.00
6.11
1.99
0.00
69.00
6.11
1.99
0.00
70.00
6.11
1.99
0.00
71.00
6.11
1.99
0.00
72.00
6.11
1.99
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 149
Summary for Subcatchment 6S: By -Pass #1
Runoff = 14.67 cfs @ 12.12 hrs, Volume= 1.120 af, Depth= 1.91"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 25 Year Rainfall=6.1 1 "
Area (ac) CN Description
6.540 58 Woods/grass comb., Good, HSG B
0.500 73 Brush, Good, HSG D
7.040 59 Weighted Average
7.040 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.5 Direct Entry,
Subcatchment 6S: By -Pass #1
Hydrograph
16
15
14.67
cfs
L I
L1
LI
LI a 1-1 I
13
T
T
IT IT I
T
T
T
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12
4
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H
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11
10
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9
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LL
_t
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HI H IHH IH8'
6
V_L�1.7
5
1-
14
1 1 14-1
�-1
�-I
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4
3
1111111 I I I I
2
1
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fil
t—I
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1
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 150
Hydrograph for Subcatchment 6S: By -Pass #1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.06
0.00
0.00
2.00
0.13
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.29
0.00
0.00
5.00
0.38
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.60
0.00
0.00
8.00
0.73
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.00
0.00
11.00
1.44
0.00
0.00
12.00
4.05
0.74
9.17
13.00
4.72
1.08
1.78
14.00
5.01
1.24
1.04
15.00
5.21
1.36
0.80
16.00
5.38
1.45
0.64
17.00
5.51
1.53
0.55
18.00
5.63
1.61
0.50
19.00
5.73
1.67
0.44
20.00
5.82
1.72
0.37
21.00
5.89
1.77
0.35
22.00
5.97
1.82
0.33
23.00
6.04
1.87
0.32
24.00
6.11
1.91
0.31
25.00
6.11
1.91
0.00
26.00
6.11
1.91
0.00
27.00
6.11
1.91
0.00
28.00
6.11
1.91
0.00
29.00
6.11
1.91
0.00
30.00
6.11
1.91
0.00
31.00
6.11
1.91
0.00
32.00
6.11
1.91
0.00
33.00
6.11
1.91
0.00
34.00
6.11
1.91
0.00
35.00
6.11
1.91
0.00
36.00
6.11
1.91
0.00
37.00
6.11
1.91
0.00
38.00
6.11
1.91
0.00
39.00
6.11
1.91
0.00
40.00
6.11
1.91
0.00
41.00
6.11
1.91
0.00
42.00
6.11
1.91
0.00
43.00
6.11
1.91
0.00
44.00
6.11
1.91
0.00
45.00
6.11
1.91
0.00
46.00
6.11
1.91
0.00
47.00
6.11
1.91
0.00
48.00
6.11
1.91
0.00
49.00
6.11
1.91
0.00
50.00
6.11
1.91
0.00
51.00
6.11
1.91
0.00
52.00
6.11
1.91
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.11
1.91
0.00
54.00
6.11
1.91
0.00
55.00
6.11
1.91
0.00
56.00
6.11
1.91
0.00
57.00
6.11
1.91
0.00
58.00
6.11
1.91
0.00
59.00
6.11
1.91
0.00
60.00
6.11
1.91
0.00
61.00
6.11
1.91
0.00
62.00
6.11
1.91
0.00
63.00
6.11
1.91
0.00
64.00
6.11
1.91
0.00
65.00
6.11
1.91
0.00
66.00
6.11
1.91
0.00
67.00
6.11
1.91
0.00
68.00
6.11
1.91
0.00
69.00
6.11
1.91
0.00
70.00
6.11
1.91
0.00
71.00
6.11
1.91
0.00
72.00
6.11
1.91
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 151
Summary for Subcatchment POI#2: Post -Development POI#2
Runoff = 4.37 cfs @ 12.11 hrs, Volume= 0.312 af, Depth= 2.43"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 25 Year Rainfall=6.1 1 "
Area (ac) CN Description
1.540 65 Woods/grass comb., Fair, HSG B
1.540 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
17.6 Direct Entry,
Subcatchment POI#2: Post -Development POW
Hydrograph
� � I ❑Runoff
4.37cfs IIIIIIIIIIIIIIIIIII
III I I III $� *lair IR'aintaIIL6.11'I'�
IIII I I III IRuhbff Area0l.540 ad
3 e I I I' JA I I I I I I I I I I I I I RunoffV(oilume=0.3i12 p#
In Runoff Deo h=2.4'j
IIII.
MM
LL 2 I I III I I I I I I I I I I I I I I I I I I I I �iVL�5�
A
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 152
Hydrograph for Subcatchment POI#2: Post -Development POI#2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.06
0.00
0.00
2.00
0.13
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.29
0.00
0.00
5.00
0.38
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.60
0.00
0.00
8.00
0.73
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.00
0.00
11.00
1.44
0.02
0.05
12.00
4.05
1.06
3.07
13.00
4.72
1.47
0.46
14.00
5.01
1.66
0.27
15.00
5.21
1.80
0.20
16.00
5.38
1.91
0.16
17.00
5.51
2.00
0.14
18.00
5.63
2.08
0.12
19.00
5.73
2.16
0.11
20.00
5.82
2.22
0.09
21.00
5.89
2.27
0.09
22.00
5.97
2.33
0.08
23.00
6.04
2.38
0.08
24.00
6.11
2.43
0.08
25.00
6.11
2.43
0.00
26.00
6.11
2.43
0.00
27.00
6.11
2.43
0.00
28.00
6.11
2.43
0.00
29.00
6.11
2.43
0.00
30.00
6.11
2.43
0.00
31.00
6.11
2.43
0.00
32.00
6.11
2.43
0.00
33.00
6.11
2.43
0.00
34.00
6.11
2.43
0.00
35.00
6.11
2.43
0.00
36.00
6.11
2.43
0.00
37.00
6.11
2.43
0.00
38.00
6.11
2.43
0.00
39.00
6.11
2.43
0.00
40.00
6.11
2.43
0.00
41.00
6.11
2.43
0.00
42.00
6.11
2.43
0.00
43.00
6.11
2.43
0.00
44.00
6.11
2.43
0.00
45.00
6.11
2.43
0.00
46.00
6.11
2.43
0.00
47.00
6.11
2.43
0.00
48.00
6.11
2.43
0.00
49.00
6.11
2.43
0.00
50.00
6.11
2.43
0.00
51.00
6.11
2.43
0.00
52.00
6.11
2.43
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.11
2.43
0.00
54.00
6.11
2.43
0.00
55.00
6.11
2.43
0.00
56.00
6.11
2.43
0.00
57.00
6.11
2.43
0.00
58.00
6.11
2.43
0.00
59.00
6.11
2.43
0.00
60.00
6.11
2.43
0.00
61.00
6.11
2.43
0.00
62.00
6.11
2.43
0.00
63.00
6.11
2.43
0.00
64.00
6.11
2.43
0.00
65.00
6.11
2.43
0.00
66.00
6.11
2.43
0.00
67.00
6.11
2.43
0.00
68.00
6.11
2.43
0.00
69.00
6.11
2.43
0.00
70.00
6.11
2.43
0.00
71.00
6.11
2.43
0.00
72.00
6.11
2.43
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 153
Summary for Subcatchment P0I#3: Post -Development P0I#3
Runoff = 15.46 cfs @ 12.08 hrs, Volume= 1.009 af, Depth= 2.61"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 25 Year Rainfall=6.1 1 "
Area (ac) CN Description
4.318 65 Woods/grass comb., Fair, HSG B
0.317 98 Paved parking, HSG B
4.635 67 Weighted Average
4.318 93.16% Pervious Area
0.317 6.84% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
14.9 Direct Entry,
Subcatchment P0I#3: Post -Development P0I#3
Hydrograph
-F
T-,
17
1
1 15.
V cfs
1 14-1
�-1
H
H N 11-4
15
14
I -A
-1
1 U
I I I I I
-LI
-LI
U
:8*4fJR1aWca 114. W
13
12
I�
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T
TI
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11
rt
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I rt I I
fi I
fit"P
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10
U 9
0 8
H I-
+
+ I +
nl 11 'I CI
LL 7
-kI-k1
�1
�1
nun
�1 N 1-4 1- I4�L-6
6
5
_
1t
L I
LI
_LI
L1
L1 L 1-1 I- I—i 11 I 1
4
3
I�
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T I
T1
71
T-1
F1 n 1t 17 7 17 1 T
I�fit
fit
fit
t-1
�I N I� 1� I� I� Ifil
1
14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 154
Hydrograph for Subcatchment POI#3: Post -Development POI#3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.06
0.00
0.00
2.00
0.13
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.29
0.00
0.00
5.00
0.38
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.60
0.00
0.00
8.00
0.73
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.00
0.03
11.00
1.44
0.04
0.24
12.00
4.05
1.18
12.56
13.00
4.72
1.61
1.40
14.00
5.01
1.81
0.82
15.00
5.21
1.95
0.64
16.00
5.38
2.07
0.50
17.00
5.51
2.17
0.44
18.00
5.63
2.25
0.39
19.00
5.73
2.33
0.34
20.00
5.82
2.39
0.29
21.00
5.89
2.45
0.27
22.00
5.97
2.51
0.26
23.00
6.04
2.56
0.25
24.00
6.11
2.61
0.24
25.00
6.11
2.61
0.00
26.00
6.11
2.61
0.00
27.00
6.11
2.61
0.00
28.00
6.11
2.61
0.00
29.00
6.11
2.61
0.00
30.00
6.11
2.61
0.00
31.00
6.11
2.61
0.00
32.00
6.11
2.61
0.00
33.00
6.11
2.61
0.00
34.00
6.11
2.61
0.00
35.00
6.11
2.61
0.00
36.00
6.11
2.61
0.00
37.00
6.11
2.61
0.00
38.00
6.11
2.61
0.00
39.00
6.11
2.61
0.00
40.00
6.11
2.61
0.00
41.00
6.11
2.61
0.00
42.00
6.11
2.61
0.00
43.00
6.11
2.61
0.00
44.00
6.11
2.61
0.00
45.00
6.11
2.61
0.00
46.00
6.11
2.61
0.00
47.00
6.11
2.61
0.00
48.00
6.11
2.61
0.00
49.00
6.11
2.61
0.00
50.00
6.11
2.61
0.00
51.00
6.11
2.61
0.00
52.00
6.11
2.61
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.11
2.61
0.00
54.00
6.11
2.61
0.00
55.00
6.11
2.61
0.00
56.00
6.11
2.61
0.00
57.00
6.11
2.61
0.00
58.00
6.11
2.61
0.00
59.00
6.11
2.61
0.00
60.00
6.11
2.61
0.00
61.00
6.11
2.61
0.00
62.00
6.11
2.61
0.00
63.00
6.11
2.61
0.00
64.00
6.11
2.61
0.00
65.00
6.11
2.61
0.00
66.00
6.11
2.61
0.00
67.00
6.11
2.61
0.00
68.00
6.11
2.61
0.00
69.00
6.11
2.61
0.00
70.00
6.11
2.61
0.00
71.00
6.11
2.61
0.00
72.00
6.11
2.61
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 155
Summary for Subcatchment P0I#4: Post -Development P0I#4
Runoff = 4.59 cfs @ 12.20 hrs, Volume= 0.405 af, Depth= 2.71"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 25 Year Rainfall=6.1 1 "
Area (ac) CN Description
1.460 61 >75% Grass cover, Good, HSG B
0.336 98 Paved parking, HSG B
1.796 68 Weighted Average
1.460 81.29% Pervious Area
0.336 18.71 % Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
25.5 Direct Entry,
Subcatchment P0I#4: Post -Development P0I#4
Hydrograph
5 ❑Runoff
I I 4.59
4 I� I t l fi l tI �I �I �5 Year 1Rainfall�=6A 'i
III I I IRlunoff JArda#1.796 ad
3 17 1--F I T T F1 Ff01�YOYrPP=104W`f
�uln�� 1De:;.7 `LL
'j
2 T1111111F111111111111111��L��
IIIIIIIIIIIIII�II
1 II �II����IIIIIIIII'��I
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 156
Hydrograph for Subcatchment POI#4: Post -Development POI#4
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.06
0.00
0.00
2.00
0.13
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.29
0.00
0.00
5.00
0.38
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.60
0.00
0.00
8.00
0.73
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.01
0.01
11.00
1.44
0.05
0.08
12.00
4.05
1.24
2.29
13.00
4.72
1.68
0.71
14.00
5.01
1.89
0.35
15.00
5.21
2.03
0.26
16.00
5.38
2.15
0.21
17.00
5.51
2.25
0.18
18.00
5.63
2.34
0.16
19.00
5.73
2.42
0.14
20.00
5.82
2.48
0.12
21.00
5.89
2.54
0.11
22.00
5.97
2.60
0.10
23.00
6.04
2.65
0.10
24.00
6.11
2.71
0.10
25.00
6.11
2.71
0.00
26.00
6.11
2.71
0.00
27.00
6.11
2.71
0.00
28.00
6.11
2.71
0.00
29.00
6.11
2.71
0.00
30.00
6.11
2.71
0.00
31.00
6.11
2.71
0.00
32.00
6.11
2.71
0.00
33.00
6.11
2.71
0.00
34.00
6.11
2.71
0.00
35.00
6.11
2.71
0.00
36.00
6.11
2.71
0.00
37.00
6.11
2.71
0.00
38.00
6.11
2.71
0.00
39.00
6.11
2.71
0.00
40.00
6.11
2.71
0.00
41.00
6.11
2.71
0.00
42.00
6.11
2.71
0.00
43.00
6.11
2.71
0.00
44.00
6.11
2.71
0.00
45.00
6.11
2.71
0.00
46.00
6.11
2.71
0.00
47.00
6.11
2.71
0.00
48.00
6.11
2.71
0.00
49.00
6.11
2.71
0.00
50.00
6.11
2.71
0.00
51.00
6.11
2.71
0.00
52.00
6.11
2.71
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.11
2.71
0.00
54.00
6.11
2.71
0.00
55.00
6.11
2.71
0.00
56.00
6.11
2.71
0.00
57.00
6.11
2.71
0.00
58.00
6.11
2.71
0.00
59.00
6.11
2.71
0.00
60.00
6.11
2.71
0.00
61.00
6.11
2.71
0.00
62.00
6.11
2.71
0.00
63.00
6.11
2.71
0.00
64.00
6.11
2.71
0.00
65.00
6.11
2.71
0.00
66.00
6.11
2.71
0.00
67.00
6.11
2.71
0.00
68.00
6.11
2.71
0.00
69.00
6.11
2.71
0.00
70.00
6.11
2.71
0.00
71.00
6.11
2.71
0.00
72.00
6.11
2.71
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 157
Summary for Subcatchment POND#1: Post -Development Pond#1
Runoff = 38.87 cfs @ 12.20 hrs, Volume= 3.468 af, Depth= 2.52"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 25 Year Rainfall=6.1 1 "
Area (ac) CN Description
0.670
98
Paved parking, HSG B
12.602
58
Woods/grass comb., Good, HSG B
1.894
98
Roofs, HSG A
0.504
98
Water Surface, HSG B
0.830
61
>75% Grass cover, Good, HSG B
16.500
66
Weighted Average
13.432
81.41 % Pervious Area
3.068
18.59% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
25.7 Direct Entry,
w2
2
0 2
LL 1
1
1
1
1
Subcatchment POND#1: Post -Development Pond#1
Hydrograph
4-1�-I�—I�-I N -41-4I414
1 38.s7 cfs
1
11 + 1
f-
1-11 titItItIt
1� 1 11111111E
IA1 �17ITITIT
H 1
111T1_
2 4 6 8 10 12 14
1111111:E
LI EIRUnbiflAr@d='[6.5QQ:td
— — — P��njrj 7LZI.PT
nnn
fil �I fi1 r1 I� I� Ifi �L�
LILIEI ❑I:1I::[IZIZIZI
1I�I�I�I�I�_I�_I �_j 11I�11�
24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 158
Hydrograph for Subcatchment POND#1: Post -Development Pond#1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.06
0.00
0.00
2.00
0.13
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.29
0.00
0.00
5.00
0.38
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.60
0.00
0.00
8.00
0.73
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.00
0.01
11.00
1.44
0.03
0.54
12.00
4.05
1.12
18.64
13.00
4.72
1.54
6.22
14.00
5.01
1.73
3.10
15.00
5.21
1.88
2.30
16.00
5.38
1.99
1.84
17.00
5.51
2.08
1.55
18.00
5.63
2.17
1.39
19.00
5.73
2.24
1.21
20.00
5.82
2.31
1.04
21.00
5.89
2.36
0.95
22.00
5.97
2.42
0.91
23.00
6.04
2.47
0.88
24.00
6.11
2.52
0.85
25.00
6.11
2.52
0.01
26.00
6.11
2.52
0.00
27.00
6.11
2.52
0.00
28.00
6.11
2.52
0.00
29.00
6.11
2.52
0.00
30.00
6.11
2.52
0.00
31.00
6.11
2.52
0.00
32.00
6.11
2.52
0.00
33.00
6.11
2.52
0.00
34.00
6.11
2.52
0.00
35.00
6.11
2.52
0.00
36.00
6.11
2.52
0.00
37.00
6.11
2.52
0.00
38.00
6.11
2.52
0.00
39.00
6.11
2.52
0.00
40.00
6.11
2.52
0.00
41.00
6.11
2.52
0.00
42.00
6.11
2.52
0.00
43.00
6.11
2.52
0.00
44.00
6.11
2.52
0.00
45.00
6.11
2.52
0.00
46.00
6.11
2.52
0.00
47.00
6.11
2.52
0.00
48.00
6.11
2.52
0.00
49.00
6.11
2.52
0.00
50.00
6.11
2.52
0.00
51.00
6.11
2.52
0.00
52.00
6.11
2.52
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.11
2.52
0.00
54.00
6.11
2.52
0.00
55.00
6.11
2.52
0.00
56.00
6.11
2.52
0.00
57.00
6.11
2.52
0.00
58.00
6.11
2.52
0.00
59.00
6.11
2.52
0.00
60.00
6.11
2.52
0.00
61.00
6.11
2.52
0.00
62.00
6.11
2.52
0.00
63.00
6.11
2.52
0.00
64.00
6.11
2.52
0.00
65.00
6.11
2.52
0.00
66.00
6.11
2.52
0.00
67.00
6.11
2.52
0.00
68.00
6.11
2.52
0.00
69.00
6.11
2.52
0.00
70.00
6.11
2.52
0.00
71.00
6.11
2.52
0.00
72.00
6.11
2.52
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 159
Summary for Subcatchment POND#2: Post -Development Pond #2
Runoff = 22.98 cfs @ 12.03 hrs, Volume= 1.307 af, Depth= 2.99"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 25 Year Rainfall=6.1 1 "
Area (ac) CN Description
0.246
98
Paved parking, HSG B
3.500
58
Woods/grass comb., Good, HSG B
0.220
79
Woods/grass comb., Good, HSG D
1.010
98
Roofs, HSG A
0.272
98
Water Surface, HSG A
5.248
71
Weighted Average
3.720
70.88% Pervious Area
1.528
29.12% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
11.0 Direct Entry,
21
1E
1E
17
1E
1E
u 14
0 12
12
LL 11
1c
f
Subcatchment POND#2: Post -Development Pond #2
Hydrograph
I I H I HI
1 11 cfs H H
IHI HIHIHIHIH
1-4I 414I4-1+14-
H I-
I4 H I I
I�
IIHIH
H
H HHIHH
I t—I
H H H IH H '�I111�24� r
HI HI i� *�arjRlaint�114A'�
HI HI tRuhbif#-Ai*a�--5.24$ Ad
H J °f 1 P_:�1 i*Tia_ f
HI HI HI �nlrl � 'I'I
c= 1 min
HHHHIHHHj:�Lj11
HHHIHHHHIIIII
IHI �IHIHIHIHIHIHIHIHIHIHIHIHIH
I _L I__� I_�_ L � _�_I I I I I _� I I I
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 160
Hydrograph for Subcatchment POND#2: Post -Development Pond #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.06
0.00
0.00
2.00
0.13
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.29
0.00
0.00
5.00
0.38
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.60
0.00
0.00
8.00
0.73
0.00
0.00
9.00
0.90
0.00
0.02
10.00
1.11
0.02
0.13
11.00
1.44
0.08
0.47
12.00
4.05
1.43
22.05
13.00
4.72
1.90
1.66
14.00
5.01
2.12
0.99
15.00
5.21
2.28
0.77
16.00
5.38
2.41
0.61
17.00
5.51
2.51
0.53
18.00
5.63
2.60
0.47
19.00
5.73
2.68
0.41
20.00
5.82
2.75
0.35
21.00
5.89
2.81
0.33
22.00
5.97
2.87
0.31
23.00
6.04
2.93
0.30
24.00
6.11
2.99
0.29
25.00
6.11
2.99
0.00
26.00
6.11
2.99
0.00
27.00
6.11
2.99
0.00
28.00
6.11
2.99
0.00
29.00
6.11
2.99
0.00
30.00
6.11
2.99
0.00
31.00
6.11
2.99
0.00
32.00
6.11
2.99
0.00
33.00
6.11
2.99
0.00
34.00
6.11
2.99
0.00
35.00
6.11
2.99
0.00
36.00
6.11
2.99
0.00
37.00
6.11
2.99
0.00
38.00
6.11
2.99
0.00
39.00
6.11
2.99
0.00
40.00
6.11
2.99
0.00
41.00
6.11
2.99
0.00
42.00
6.11
2.99
0.00
43.00
6.11
2.99
0.00
44.00
6.11
2.99
0.00
45.00
6.11
2.99
0.00
46.00
6.11
2.99
0.00
47.00
6.11
2.99
0.00
48.00
6.11
2.99
0.00
49.00
6.11
2.99
0.00
50.00
6.11
2.99
0.00
51.00
6.11
2.99
0.00
52.00
6.11
2.99
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.11
2.99
0.00
54.00
6.11
2.99
0.00
55.00
6.11
2.99
0.00
56.00
6.11
2.99
0.00
57.00
6.11
2.99
0.00
58.00
6.11
2.99
0.00
59.00
6.11
2.99
0.00
60.00
6.11
2.99
0.00
61.00
6.11
2.99
0.00
62.00
6.11
2.99
0.00
63.00
6.11
2.99
0.00
64.00
6.11
2.99
0.00
65.00
6.11
2.99
0.00
66.00
6.11
2.99
0.00
67.00
6.11
2.99
0.00
68.00
6.11
2.99
0.00
69.00
6.11
2.99
0.00
70.00
6.11
2.99
0.00
71.00
6.11
2.99
0.00
72.00
6.11
2.99
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 161
Summary for Subcatchment PRE-POI#2: Pre -Development POI#2
Runoff = 12.33 cfs @ 12.12 hrs, Volume= 0.903 af, Depth= 2.43"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 25 Year Rainfall=6.1 1 "
Area (ac) CN Description
4.456 65 Woods/grass comb., Fair, HSG B
4.456 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.4 Direct Entry,
Subcatchment PRE-POI#2: Pre -Development POW
Hydrograph
IIIIII
_ I � I I I I I I I I I
■Runoff
13
12.33
cfs H H H H H H� H H � �i �'
12
T II�1�
11
—
— — — — — — — — — — — — —
—
10
H
H H H H HI HI tluIllrid f#-lAi*aO-4.#56 ,�td
9
IH
H I H H H I H I HI 1l1 "Off Y-04T"f""
8
3 7
— — -
— — — — — — — —r
H IH 1 H I H 1 HI HI HI HI �nll
LL
:
mlln
5
� IH I H I H I HI HI HI HI H IH I� IH8 L
4
IIIIIIIIIIIIIIIIIIIIIIIIIIII
3-
1-414
1 H I H I HI HI HI HI IH 1-414 IH 14 1 H
2
1
H
I H i T' _Fi 7 F' IH i— _ H i— ' H
14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 162
Hydrograph for Subcatchment PRE-POI#2: Pre -Development POI#2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.06
0.00
0.00
2.00
0.13
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.29
0.00
0.00
5.00
0.38
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.60
0.00
0.00
8.00
0.73
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.00
0.00
11.00
1.44
0.02
0.14
12.00
4.05
1.06
8.33
13.00
4.72
1.47
1.34
14.00
5.01
1.66
0.78
15.00
5.21
1.80
0.59
16.00
5.38
1.91
0.47
17.00
5.51
2.00
0.41
18.00
5.63
2.08
0.36
19.00
5.73
2.16
0.32
20.00
5.82
2.22
0.27
21.00
5.89
2.27
0.25
22.00
5.97
2.33
0.24
23.00
6.04
2.38
0.23
24.00
6.11
2.43
0.22
25.00
6.11
2.43
0.00
26.00
6.11
2.43
0.00
27.00
6.11
2.43
0.00
28.00
6.11
2.43
0.00
29.00
6.11
2.43
0.00
30.00
6.11
2.43
0.00
31.00
6.11
2.43
0.00
32.00
6.11
2.43
0.00
33.00
6.11
2.43
0.00
34.00
6.11
2.43
0.00
35.00
6.11
2.43
0.00
36.00
6.11
2.43
0.00
37.00
6.11
2.43
0.00
38.00
6.11
2.43
0.00
39.00
6.11
2.43
0.00
40.00
6.11
2.43
0.00
41.00
6.11
2.43
0.00
42.00
6.11
2.43
0.00
43.00
6.11
2.43
0.00
44.00
6.11
2.43
0.00
45.00
6.11
2.43
0.00
46.00
6.11
2.43
0.00
47.00
6.11
2.43
0.00
48.00
6.11
2.43
0.00
49.00
6.11
2.43
0.00
50.00
6.11
2.43
0.00
51.00
6.11
2.43
0.00
52.00
6.11
2.43
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.11
2.43
0.00
54.00
6.11
2.43
0.00
55.00
6.11
2.43
0.00
56.00
6.11
2.43
0.00
57.00
6.11
2.43
0.00
58.00
6.11
2.43
0.00
59.00
6.11
2.43
0.00
60.00
6.11
2.43
0.00
61.00
6.11
2.43
0.00
62.00
6.11
2.43
0.00
63.00
6.11
2.43
0.00
64.00
6.11
2.43
0.00
65.00
6.11
2.43
0.00
66.00
6.11
2.43
0.00
67.00
6.11
2.43
0.00
68.00
6.11
2.43
0.00
69.00
6.11
2.43
0.00
70.00
6.11
2.43
0.00
71.00
6.11
2.43
0.00
72.00
6.11
2.43
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 163
Summary for Subcatchment PRE-POI#3: Pre -Development P0I#3
Runoff = 19.43 cfs @ 12.14 hrs, Volume= 1.489 af, Depth= 2.52"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 25 Year Rainfall=6.1 1 "
Area (ac)
CN Description
6.950
65 Woods/grass comb.,
Fair,
HSG B
0.137
98 Paved roads w/curbs
& sewers, HSG B
7.087
66 Weighted Average
6.950
98.07% Pervious Area
0.137
1.93% Impervious Area
Tc Length Slope Velocity Capacity
Description
(min) (feet) (ft/ft) (ft/sec)
(cfs)
20.0
Direct Entry,
Subcatchment PRE-POI#3:
Pre -Development P0I#3
Hydrograph
21
�- I
�-I � ,
i I I l i I� 1- Runoff
20
19
19.43 cfs
�I H
H I�
�I I�p�
I� 1 1 1 1 t I t I
t I
fit t_I
18
16
15
1:1 1 ::11 Z 1 Z 1 Z 1
L
D D
1RuffbifUA *a��.Q87f :CLd
13
1-4 1 4 14 1 _� I �_ 1
4-1
�_1 �:RtF4off
V-1-07-14M- P�1- f ly"
11
4 14 1+1 +1
4-1
+-1 �1
H nl P
0 10
LL 9
—
_tI_�ItItItIfit
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7
6
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4
141_�I�_IJ-1�_1�_1�_1
1--t1-I__�141__�
3
2
I� ICI I
I
-1 H
H I I I--1 14 I4 14 1�1
1
0
0
2 4
6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 164
Hydrograph for Subcatchment PRE-POI#3: Pre -Development POI#3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.06
0.00
0.00
2.00
0.13
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.29
0.00
0.00
5.00
0.38
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.60
0.00
0.00
8.00
0.73
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.00
0.01
11.00
1.44
0.03
0.27
12.00
4.05
1.12
12.28
13.00
4.72
1.54
2.27
14.00
5.01
1.73
1.28
15.00
5.21
1.88
0.97
16.00
5.38
1.99
0.77
17.00
5.51
2.08
0.66
18.00
5.63
2.17
0.59
19.00
5.73
2.24
0.51
20.00
5.82
2.31
0.44
21.00
5.89
2.36
0.41
22.00
5.97
2.42
0.39
23.00
6.04
2.47
0.38
24.00
6.11
2.52
0.36
25.00
6.11
2.52
0.00
26.00
6.11
2.52
0.00
27.00
6.11
2.52
0.00
28.00
6.11
2.52
0.00
29.00
6.11
2.52
0.00
30.00
6.11
2.52
0.00
31.00
6.11
2.52
0.00
32.00
6.11
2.52
0.00
33.00
6.11
2.52
0.00
34.00
6.11
2.52
0.00
35.00
6.11
2.52
0.00
36.00
6.11
2.52
0.00
37.00
6.11
2.52
0.00
38.00
6.11
2.52
0.00
39.00
6.11
2.52
0.00
40.00
6.11
2.52
0.00
41.00
6.11
2.52
0.00
42.00
6.11
2.52
0.00
43.00
6.11
2.52
0.00
44.00
6.11
2.52
0.00
45.00
6.11
2.52
0.00
46.00
6.11
2.52
0.00
47.00
6.11
2.52
0.00
48.00
6.11
2.52
0.00
49.00
6.11
2.52
0.00
50.00
6.11
2.52
0.00
51.00
6.11
2.52
0.00
52.00
6.11
2.52
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.11
2.52
0.00
54.00
6.11
2.52
0.00
55.00
6.11
2.52
0.00
56.00
6.11
2.52
0.00
57.00
6.11
2.52
0.00
58.00
6.11
2.52
0.00
59.00
6.11
2.52
0.00
60.00
6.11
2.52
0.00
61.00
6.11
2.52
0.00
62.00
6.11
2.52
0.00
63.00
6.11
2.52
0.00
64.00
6.11
2.52
0.00
65.00
6.11
2.52
0.00
66.00
6.11
2.52
0.00
67.00
6.11
2.52
0.00
68.00
6.11
2.52
0.00
69.00
6.11
2.52
0.00
70.00
6.11
2.52
0.00
71.00
6.11
2.52
0.00
72.00
6.11
2.52
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 165
Summary for Subcatchment PRE-P0I#4: Pre -Development P0I#4
Runoff = 8.23 cfs @ 12.09 hrs, Volume= 0.554 af, Depth= 2.61"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 25 Year Rainfall=6.1 1 "
Area (ac) CN Description
2.410 65 Woods/grass comb., Fair, HSG B
0.135 98 Paved parking, HSG B
2.545 67 Weighted Average
2.410 94.70% Pervious Area
0.135 5.30% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
15.9 Direct Entry,
Subcatchment PRE-P0I#4: Pre -Development P0I#4
Hydrograaph
9
L
Runoff
cfs
8.23
H H H I—t
s
/
I-4
4 4 14- 4- 1 i� *�ar�Rlain611L_6A'0
7
It -
-LiI.
4 1 �- I �I �I �I Ru"ff-AtjdaO-2.545 Ad
6
L �I ��49olfj�i� 4 � 0}554 a#
U 5
3
L° 4C�
5. min
L
IIIIIIIIIIII64�
3
II
IIIIIIIIIIIIIIIII
2
I®■
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 166
Hydrograph for Subcatchment PRE-POI#4: Pre -Development POI#4
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.06
0.00
0.00
2.00
0.13
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.29
0.00
0.00
5.00
0.38
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.60
0.00
0.00
8.00
0.73
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.00
0.01
11.00
1.44
0.04
0.13
12.00
4.05
1.18
6.38
13.00
4.72
1.61
0.78
14.00
5.01
1.81
0.46
15.00
5.21
1.95
0.35
16.00
5.38
2.07
0.28
17.00
5.51
2.17
0.24
18.00
5.63
2.25
0.21
19.00
5.73
2.33
0.19
20.00
5.82
2.39
0.16
21.00
5.89
2.45
0.15
22.00
5.97
2.51
0.14
23.00
6.04
2.56
0.14
24.00
6.11
2.61
0.13
25.00
6.11
2.61
0.00
26.00
6.11
2.61
0.00
27.00
6.11
2.61
0.00
28.00
6.11
2.61
0.00
29.00
6.11
2.61
0.00
30.00
6.11
2.61
0.00
31.00
6.11
2.61
0.00
32.00
6.11
2.61
0.00
33.00
6.11
2.61
0.00
34.00
6.11
2.61
0.00
35.00
6.11
2.61
0.00
36.00
6.11
2.61
0.00
37.00
6.11
2.61
0.00
38.00
6.11
2.61
0.00
39.00
6.11
2.61
0.00
40.00
6.11
2.61
0.00
41.00
6.11
2.61
0.00
42.00
6.11
2.61
0.00
43.00
6.11
2.61
0.00
44.00
6.11
2.61
0.00
45.00
6.11
2.61
0.00
46.00
6.11
2.61
0.00
47.00
6.11
2.61
0.00
48.00
6.11
2.61
0.00
49.00
6.11
2.61
0.00
50.00
6.11
2.61
0.00
51.00
6.11
2.61
0.00
52.00
6.11
2.61
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.11
2.61
0.00
54.00
6.11
2.61
0.00
55.00
6.11
2.61
0.00
56.00
6.11
2.61
0.00
57.00
6.11
2.61
0.00
58.00
6.11
2.61
0.00
59.00
6.11
2.61
0.00
60.00
6.11
2.61
0.00
61.00
6.11
2.61
0.00
62.00
6.11
2.61
0.00
63.00
6.11
2.61
0.00
64.00
6.11
2.61
0.00
65.00
6.11
2.61
0.00
66.00
6.11
2.61
0.00
67.00
6.11
2.61
0.00
68.00
6.11
2.61
0.00
69.00
6.11
2.61
0.00
70.00
6.11
2.61
0.00
71.00
6.11
2.61
0.00
72.00
6.11
2.61
0.00

Weddington Acres HydroCAD Revised Layout Type 11 24-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 167
Summary for Pond DET POND-1: Detention Pond #1
Inflow Area = 16.500 ac, 18.59% Impervious, Inflow Depth = 2.52" for 25 Year event
Inflow = 38.87 cfs @ 12.20 hrs, Volume= 3.468 of
Outflow = 16.87 cfs @ 12.53 hrs, Volume= 3.157 af, Atten= 57%, Lag= 19.5 min
Primary = 16.87 cfs @ 12.53 hrs, Volume= 3.157 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Peak Elev= 713.20' @ 12.53 hrs Surf.Area= 16,115 sf Storage= 52,238 cf
Plug -Flow detention time= 288.4 min calculated for 3.157 of (91 % of inflow)
Center -of -Mass det. time= 241.7 min ( 1,103.4 - 861.7 )
Volume Invert Avail.Storage Storage Description
#1 708.00' 104,832 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
708.00 2,289 0 0
709.00 5,540 3,915 3,915
710.00 8,705 7,123 11,037
711.00 11,744 10,225 21,262
712.00 14,012 12,878 34,140
713.00 15,752 14,882 49,022
714.00 17,548 16,650 65,672
715.00 19,401 18,475 84,146
716.00 21,970 20,686 104,832
Device Routing Invert Outlet Devices
#1 Primary 707.00' 36.0" Round Culvert
L= 111.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 707.00' / 705.00' S= 0.0180 '/' Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 7.07 sf
#2 Device 1 708.00' 1.3" Vert. WQ C= 0.600
#3 Device 1 711.33' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 2.67
Width (feet) 2.00 2.00
#4 Device 1 714.00' 48.0" x 48.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 715.00' 18.0' long x 18.0' 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) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Primary OutFlow Max=16.84 cfs @ 12.53 hrs HW=713.20' (Free Discharge)
L1=Culvert (Passes 16.84 cfs of 73.78 cfs potential flow)
2=WQ (Orifice Controls 0.10 cfs @ 10.92 fps)
3=Custom Weir/Orifice (Weir Controls 16.74 cfs @ 4.48 fps)
4=Orifi ce/G rate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=708.00' (Free Discharge)
L5= Broad -Crested Rectangular Weir( Controls 0.00 cfs)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 168
Pond DET POND-1: Detention Pond #1
Hydrograph
1
1
1-+
4-1
�-t
4­1 I- 4 14
38.87 cfs
4
E
-
-�I I�
inflow �4r"=116 50101 a�c1
42
40
/
1 +
7
1 T I
_1
14
T-
H
Peak Elev=713.20'
38
336
4
/
i-1
IT
-T
ITI
TI
I-
Tj
F
-
_§�prrage=�;,p8pf
32
30
/
i
1
—
�
1+I
H
1-
1-1
H
— -
I+I -H H I + I -I I-+ 1
26
%
ICI
I�
ICI
ICI �I I� ICI �I I�
22
0 20
/
16.87 cfs
1 t I
H
fi I
H
It I -1 H I t I _I 1-f I
LL 1816
14
/
/
4
IT_I
P
4
IT-1
P
IT Ti 1=1 IT_I PI I=F 1
12
10
/
IrtI
tI
�
rtl
Ifit "IrtI tI Irt1
8
6
/
7
0.00
cfs
0
0
2 4 6 8
10 12 14 16 18 20
22 24 26 28 30
32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
Pond DET POND-1: Detention Pond #1
Stage -Discharge
716
/I
715
714
Custom WeirP
1
•
1:
1
1
60 80 100 120 140
Discharge (cfs)
M Inflow
E Outflow
0 Primary
❑ Secondary
❑ Total
❑ Primary
❑ Secondary

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 169
m
713
d
c 712
d
w 711
708 Q
0
Pond DET POND-1: Detention Pond #1
Stage -Area -Storage
Surface/HorizontaiMetted Area (sq-ft)
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000
40,000 50,000 60,000 70,000 80,000 90,000 100,000
Storage (cubic -feet)
Surface
❑ Storage

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 170
Hydrograph for Pond DET POND-1: Detention Pond #1
Time
Inflow
Storage
Elevation
Outflow
Primary
Secondary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
(cfs)
(cfs)
0.00
0.00
0
708.00
0.00
0.00
0.00
2.50
0.00
0
708.00
0.00
0.00
0.00
5.00
0.00
0
708.00
0.00
0.00
0.00
7.50
0.00
0
708.00
0.00
0.00
0.00
10.00
0.01
3
708.00
0.00
0.00
0.00
12.50
18.16
52,179
713.20
16.83
16.83
0.00
15.00
2.30
32,455
711.88
2.75
2.75
0.00
17.50
1.47
30,119
711.71
1.60
1.60
0.00
20.00
1.04
29,084
711.63
1.16
1.16
0.00
22.50
0.90
28,513
711.58
0.93
0.93
0.00
25.00
0.01
27,041
711.47
0.44
0.44
0.00
27.50
0.00
25,345
711.34
0.09
0.09
0.00
30.00
0.00
24,621
711.28
0.08
0.08
0.00
32.50
0.00
23,907
711.22
0.08
0.08
0.00
35.00
0.00
23,199
711.16
0.08
0.08
0.00
37.50
0.00
22,498
711.10
0.08
0.08
0.00
40.00
0.00
21,804
711.05
0.08
0.08
0.00
42.50
0.00
21,116
710.99
0.08
0.08
0.00
45.00
0.00
20,436
710.93
0.08
0.08
0.00
47.50
0.00
19,762
710.87
0.07
0.07
0.00
50.00
0.00
19,095
710.81
0.07
0.07
0.00
52.50
0.00
18,436
710.75
0.07
0.07
0.00
55.00
0.00
17,783
710.69
0.07
0.07
0.00
57.50
0.00
17,138
710.63
0.07
0.07
0.00
60.00
0.00
16,501
710.57
0.07
0.07
0.00
62.50
0.00
15,871
710.51
0.07
0.07
0.00
65.00
0.00
15,249
710.45
0.07
0.07
0.00
67.50
0.00
14,635
710.39
0.07
0.07
0.00
70.00
0.00
14,029
710.33
0.07
0.07
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 171
Stage -Discharge for Pond DET POND-1: Detention Pond #1
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
708.00
0.00
0.00
0.00
708.10
0.01
0.01
0.00
708.20
0.02
0.02
0.00
708.30
0.02
0.02
0.00
708.40
0.03
0.03
0.00
708.50
0.03
0.03
0.00
708.60
0.03
0.03
0.00
708.70
0.04
0.04
0.00
708.80
0.04
0.04
0.00
708.90
0.04
0.04
0.00
709.00
0.04
0.04
0.00
709.10
0.05
0.05
0.00
709.20
0.05
0.05
0.00
709.30
0.05
0.05
0.00
709.40
0.05
0.05
0.00
709.50
0.05
0.05
0.00
709.60
0.06
0.06
0.00
709.70
0.06
0.06
0.00
709.80
0.06
0.06
0.00
709.90
0.06
0.06
0.00
710.00
0.06
0.06
0.00
710.10
0.06
0.06
0.00
710.20
0.07
0.07
0.00
710.30
0.07
0.07
0.00
710.40
0.07
0.07
0.00
710.50
0.07
0.07
0.00
710.60
0.07
0.07
0.00
710.70
0.07
0.07
0.00
710.80
0.07
0.07
0.00
710.90
0.07
0.07
0.00
711.00
0.08
0.08
0.00
711.10
0.08
0.08
0.00
711.20
0.08
0.08
0.00
711.30
0.08
0.08
0.00
711.40
0.20
0.20
0.00
711.50
0.54
0.54
0.00
711.60
1.00
1.00
0.00
711.70
1.56
1.56
0.00
711.80
2.20
2.20
0.00
711.90
2.91
2.91
0.00
712.00
3.68
3.68
0.00
712.10
4.51
4.51
0.00
712.20
5.41
5.41
0.00
712.30
6.35
6.35
0.00
712.40
7.34
7.34
0.00
712.50
8.38
8.38
0.00
712.60
9.47
9.47
0.00
712.70
10.60
10.60
0.00
712.80
11.77
11.77
0.00
712.90
12.98
12.98
0.00
713.00
14.23
14.23
0.00
713.10
15.52
15.52
0.00
713.20
16.85
16.85
0.00
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
713.30
18.21
18.21
0.00
713.40
19.61
19.61
0.00
713.50
21.04
21.04
0.00
713.60
22.51
22.51
0.00
713.70
24.00
24.00
0.00
713.80
25.53
25.53
0.00
713.90
27.09
27.09
0.00
714.00
28.68
28.68
0.00
714.10
31.75
31.75
0.00
714.20
36.05
36.05
0.00
714.30
41.16
41.16
0.00
714.40
46.92
46.92
0.00
714.50
53.26
53.26
0.00
714.60
60.12
60.12
0.00
714.70
67.44
67.44
0.00
714.80
75.20
75.20
0.00
714.90
83.38
83.38
0.00
715.00
86.77
86.77
0.00
715.10
88.96
87.44
1.53
715.20
92.41
88.10
4.31
715.30
96.71
88.75
7.96
715.40
101.70
89.40
12.29
715.50
107.23
90.05
17.18
715.60
113.28
90.69
22.59
715.70
119.47
91.33
28.15
715.80
125.96
91.96
34.00
715.90
133.08
92.59
40.50
716.00
140.55
93.21
47.34

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 172
Stage -Area -Storage for Pond DET POND-1: Detention Pond #1
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
708.00
2,289
0
708.10
2,614
245
708.20
2,939
523
708.30
3,264
833
708.40
3,589
1,176
708.50
3,915
1,551
708.60
4,240
1,959
708.70
4,565
2,399
708.80
4,890
2,872
708.90
5,215
3,377
709.00
5,540
3,915
709.10
5,857
4,484
709.20
6,173
5,086
709.30
6,489
5,719
709.40
6,806
6,384
709.50
7,123
7,080
709.60
7,439
7,808
709.70
7,756
8,568
709.80
8,072
9,359
709.90
8,388
10,182
710.00
8,705
11,037
710.10
9,009
11,923
710.20
9,313
12,839
710.30
9,617
13,785
710.40
9,921
14,762
710.50
10,225
15,769
710.60
10,528
16,807
710.70
10,832
17,875
710.80
11,136
18,973
710.90
11,440
20,102
711.00
11,744
21,262
711.10
11,971
22,447
711.20
12,198
23,656
711.30
12,424
24,887
711.40
12,651
26,141
711.50
12,878
27,417
711.60
13,105
28,716
711.70
13,332
30,038
711.80
13,558
31,382
711.90
13,785
32,750
712.00
14,012
34,140
712.10
14,186
35,549
712.20
14,360
36,977
712.30
14,534
38,421
712.40
14,708
39,883
712.50
14,882
41,363
712.60
15,056
42,860
712.70
15,230
44,374
712.80
15,404
45,906
712.90
15,578
47,455
713.00
15,752
49,022
713.10
15,932
50,606
713.20
16,111
52,208
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
713.30
16,291
53,828
713.40
16,470
55,466
713.50
16,650
57,122
713.60
16,830
58,796
713.70
17,009
60,488
713.80
17,189
62,198
713.90
17,368
63,926
714.00
17,548
65,672
714.10
17,733
67,436
714.20
17,919
69,218
714.30
18,104
71,019
714.40
18,289
72,839
714.50
18,475
74,677
714.60
18,660
76,534
714.70
18,845
78,409
714.80
19,030
80,303
714.90
19,216
82,215
715.00
19,401
84,146
715.10
19,658
86,099
715.20
19,915
88,078
715.30
20,172
90,082
715.40
20,429
92,112
715.50
20,686
94,168
715.60
20,942
96,249
715.70
21,199
98,356
715.80
21,456
100,489
715.90
21,713
102,647
716.00
21,970
104,832

Weddington Acres HydroCAD Revised Layout Type 11 24-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 173
Summary for Pond DET POND-2: Detention Pond #2
Inflow Area = 5.248 ac, 29.12% Impervious, Inflow Depth = 2.99" for 25 Year event
Inflow = 22.98 cfs @ 12.03 hrs, Volume= 1.307 of
Outflow = 10.65 cfs @ 12.17 hrs, Volume= 1.288 af, Atten= 54%, Lag= 8.6 min
Primary = 10.65 cfs @ 12.17 hrs, Volume= 1.288 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Peak Elev= 700.19' @ 12.17 hrs Surf.Area= 8,500 sf Storage= 20,252 cf
Plug -Flow detention time= 352.8 min calculated for 1.288 of (99% of inflow)
Center -of -Mass det. time= 344.3 min ( 1,180.8 - 836.4 )
Volume Invert Avail.Storage Storage Description
#1 697.00' 49,496 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
697.00 3,325 0 0
698.00 5,881 4,603 4,603
699.00 6,979 6,430 11,033
700.00 8,219 7,599 18,632
701.00 9,671 8,945 27,577
702.00 11,155 10,413 37,990
703.00 11,857 11,506 49,496
Device Routing Invert Outlet Devices
#1 Primary 696.00' 24.0" Round RCP -Round 24"
L= 66.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 696.00' / 695.00' S= 0.0152 '/' Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 3.14 sf
#2 Device 1 697.00' 1.5" Vert. WQ C= 0.600
#3 Device 1 698.82' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 2.18
Width (feet) 2.00 2.00
#4 Device 1 701.00' 48.0" x 48.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 702.00' 10.0' 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=10.49 cfs @ 12.17 hrs HW=700.18' (Free Discharge)
L1=RCP_Round 24" (Passes 10.49 cfs of 26.97 cfs potential flow)
2=WQ (Orifice Controls 0.10 cfs @ 8.50 fps)
3=Custom Weir/Orifice (Weir Controls 10.38 cfs @ 3.82 fps)
4=Orifi ce/G rate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=697.00' (Free Discharge)
L5= Broad -Crested Rectangular Weir( Controls 0.00 cfs)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft
Printed
5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD
Software Solutions LLC
Page 174
Pond DET POND-2: Detention Pond #2
Hydrograph
IIIIIIIIIIIi111111111I11I1I11111
22.98 cfs,,
■Inflow
■ outflow
1 + I
H 1�f�cvirr�.12 ICI
IN Primary
■ Secondary
24
I I
11 11 I I I 1� CI��,$'
22
/
i
—
I +
H 1- 1-1 H I$# 2%252-ef
20
18
IIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIII
16
140.
—1
1+ I
H 1- -HH I -HH I+ I -I 1�
1 cfs
0 12
10
8
I+TI
H 1�-+ ;J- I H +I -1 H 1+1 HI 1—�
6
�
II
llllllllllllllllllllll
Pond DET POND-2: Detention Pond #2
Stage -Discharge
■ Total
■ Primary
■ Secondary
0 5 10 15 20 25 30 35 40 45 50 55 60
Discharge (cfs)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 175
Pond DET POND-2: Detention Pond #2
Stage -Area -Storage
Surface/Horizontal/Wetted Area (sq-ft)
1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000
Storage (cubic -feet)
Surface
❑ Storage

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 176
Hydrograph for Pond DET POND-2: Detention Pond #2
Time
Inflow
Storage
Elevation
Outflow
Primary
Secondary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
(cfs)
(cfs)
0.00
0.00
0
697.00
0.00
0.00
0.00
2.50
0.00
0
697.00
0.00
0.00
0.00
5.00
0.00
0
697.00
0.00
0.00
0.00
7.50
0.00
0
697.00
0.00
0.00
0.00
10.00
0.13
265
697.08
0.01
0.01
0.00
12.50
2.95
16,434
699.73
5.76
5.76
0.00
15.00
0.77
11,449
699.06
0.85
0.85
0.00
17.50
0.50
10,943
698.99
0.53
0.53
0.00
20.00
0.35
10,657
698.95
0.38
0.38
0.00
22.50
0.31
10,531
698.93
0.31
0.31
0.00
25.00
0.00
9,963
698.84
0.11
0.11
0.00
27.50
0.00
9,237
698.74
0.08
0.08
0.00
30.00
0.00
8,559
698.63
0.07
0.07
0.00
32.50
0.00
7,903
698.53
0.07
0.07
0.00
35.00
0.00
7,269
698.44
0.07
0.07
0.00
37.50
0.00
6,657
698.34
0.07
0.07
0.00
40.00
0.00
6,068
698.24
0.06
0.06
0.00
42.50
0.00
5,501
698.15
0.06
0.06
0.00
45.00
0.00
4,958
698.06
0.06
0.06
0.00
47.50
0.00
4,439
697.97
0.06
0.06
0.00
50.00
0.00
3,944
697.88
0.05
0.05
0.00
52.50
0.00
3,475
697.80
0.05
0.05
0.00
55.00
0.00
3,032
697.72
0.05
0.05
0.00
57.50
0.00
2,616
697.63
0.04
0.04
0.00
60.00
0.00
2,229
697.55
0.04
0.04
0.00
62.50
0.00
1,872
697.48
0.04
0.04
0.00
65.00
0.00
1,546
697.40
0.03
0.03
0.00
67.50
0.00
1,253
697.33
0.03
0.03
0.00
70.00
0.00
993
697.27
0.03
0.03
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 177
Stage -Discharge for Pond DET POND-2: Detention Pond #2
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
697.00
0.00
0.00
0.00
697.10
0.01
0.01
0.00
697.20
0.02
0.02
0.00
697.30
0.03
0.03
0.00
697.40
0.03
0.03
0.00
697.50
0.04
0.04
0.00
697.60
0.04
0.04
0.00
697.70
0.05
0.05
0.00
697.80
0.05
0.05
0.00
697.90
0.05
0.05
0.00
698.00
0.06
0.06
0.00
698.10
0.06
0.06
0.00
698.20
0.06
0.06
0.00
698.30
0.07
0.07
0.00
698.40
0.07
0.07
0.00
698.50
0.07
0.07
0.00
698.60
0.07
0.07
0.00
698.70
0.08
0.08
0.00
698.80
0.08
0.08
0.00
698.90
0.23
0.23
0.00
699.00
0.58
0.58
0.00
699.10
1.05
1.05
0.00
699.20
1.62
1.62
0.00
699.30
2.27
2.27
0.00
699.40
2.98
2.98
0.00
699.50
3.77
3.77
0.00
699.60
4.61
4.61
0.00
699.70
5.50
5.50
0.00
699.80
6.45
6.45
0.00
699.90
7.45
7.45
0.00
700.00
8.50
8.50
0.00
700.10
9.59
9.59
0.00
700.20
10.72
10.72
0.00
700.30
11.90
11.90
0.00
700.40
13.12
13.12
0.00
700.50
14.37
14.37
0.00
700.60
15.67
15.67
0.00
700.70
17.00
17.00
0.00
700.80
18.36
18.36
0.00
700.90
19.76
19.76
0.00
701.00
21.20
21.20
0.00
701.10
24.12
24.12
0.00
701.20
28.26
28.26
0.00
701.30
31.37
31.37
0.00
701.40
31.73
31.73
0.00
701.50
32.09
32.09
0.00
701.60
32.44
32.44
0.00
701.70
32.79
32.79
0.00
701.80
33.14
33.14
0.00
701.90
33.48
33.48
0.00
702.00
33.82
33.82
0.00
702.10
34.95
34.16
0.79
702.20
36.72
34.49
2.23
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
702.30
38.97
34.82
4.15
702.40
41.63
35.15
6.48
702.50
44.77
35.48
9.30
702.60
48.34
35.80
12.55
702.70
51.90
36.11
15.78
702.80
55.68
36.43
19.25
702.90
59.67
36.74
22.92
703.00
63.85
37.05
26.80

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 178
Stage -Area -Storage for Pond DET POND-2: Detention Pond #2
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
697.00
3,325
0
697.10
3,581
345
697.20
3,836
716
697.30
4,092
1,113
697.40
4,347
1,534
697.50
4,603
1,982
697.60
4,859
2,455
697.70
5,114
2,954
697.80
5,370
3,478
697.90
5,625
4,028
698.00
5,881
4,603
698.10
5,991
5,197
698.20
6,101
5,801
698.30
6,210
6,417
698.40
6,320
7,043
698.50
6,430
7,681
698.60
6,540
8,329
698.70
6,650
8,989
698.80
6,759
9,659
698.90
6,869
10,341
699.00
6,979
11,033
699.10
7,103
11,737
699.20
7,227
12,454
699.30
7,351
13,182
699.40
7,475
13,924
699.50
7,599
14,678
699.60
7,723
15,444
699.70
7,847
16,222
699.80
7,971
17,013
699.90
8,095
17,816
700.00
8,219
18,632
700.10
8,364
19,461
700.20
8,509
20,305
700.30
8,655
21,163
700.40
8,800
22,036
700.50
8,945
22,923
700.60
9,090
23,825
700.70
9,235
24,741
700.80
9,381
25,672
700.90
9,526
26,617
701.00
9,671
27,577
701.10
9,819
28,552
701.20
9,968
29,541
701.30
10,116
30,545
701.40
10,265
31,564
701.50
10,413
32,598
701.60
10,561
33,647
701.70
10,710
34,710
701.80
10,858
35,789
701.90
11,007
36,882
702.00
11,155
37,990
702.10
11,225
39,109
702.20
11,295
40,235
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
702.30
11,366
41,368
702.40
11,436
42,508
702.50
11,506
43,655
702.60
11,576
44,809
702.70
11,646
45,970
702.80
11,717
47,139
702.90
11,787
48,314
703.00
11,857
49,496

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 179
Summary for Link 4L: Pre -Development POI
Inflow Area = 36.865 ac, 0.00% Impervious, Inflow Depth = 1.76" for 25 Year event
Inflow = 60.96 cfs @ 12.17 hrs, Volume= 5.410 of
Primary = 60.96 cfs @ 12.17 hrs, Volume= 5.41Oaf, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Link 4L: Pre -Development POI
Hydrograph
I
L
❑Inflow
65
60.96
`r�fIoVw_'
+
i"��a 8f651
❑ Primary
cfs
60
LI
L
-
LI
11
-36
Ii
a
c
55
50
fi l t_I
�1
I t
It t
t_1
t t
t
40
N
21 35
H
H
I-+I+I -H
H
H
H
+ I + I
t
0
LL 30
l
25
20
HI414141�-IHHH141411-
15
10
/
rim////////////// I .
1 1 1 1 �1 1 61 62 64 66 68 70_Z5

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6. I I "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 180
Hydrograph for Link 4L: Pre -Development POI
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.00
0.00
0.00
2.00
0.00
0.00
0.00
3.00
0.00
0.00
0.00
4.00
0.00
0.00
0.00
5.00
0.00
0.00
0.00
6.00
0.00
0.00
0.00
7.00
0.00
0.00
0.00
8.00
0.00
0.00
0.00
9.00
0.00
0.00
0.00
10.00
0.00
0.00
0.00
11.00
0.01
0.00
0.01
12.00
30.79
0.00
30.79
13.00
9.61
0.00
9.61
14.00
5.29
0.00
5.29
15.00
4.03
0.00
4.03
16.00
3.24
0.00
3.24
17.00
2.78
0.00
2.78
18.00
2.49
0.00
2.49
19.00
2.19
0.00
2.19
20.00
1.87
0.00
1.87
21.00
1.73
0.00
1.73
22.00
1.68
0.00
1.68
23.00
1.62
0.00
1.62
24.00
1.56
0.00
1.56
25.00
0.01
0.00
0.01
26.00
0.00
0.00
0.00
27.00
0.00
0.00
0.00
28.00
0.00
0.00
0.00
29.00
0.00
0.00
0.00
30.00
0.00
0.00
0.00
31.00
0.00
0.00
0.00
32.00
0.00
0.00
0.00
33.00
0.00
0.00
0.00
34.00
0.00
0.00
0.00
35.00
0.00
0.00
0.00
36.00
0.00
0.00
0.00
37.00
0.00
0.00
0.00
38.00
0.00
0.00
0.00
39.00
0.00
0.00
0.00
40.00
0.00
0.00
0.00
41.00
0.00
0.00
0.00
42.00
0.00
0.00
0.00
43.00
0.00
0.00
0.00
44.00
0.00
0.00
0.00
45.00
0.00
0.00
0.00
46.00
0.00
0.00
0.00
47.00
0.00
0.00
0.00
48.00
0.00
0.00
0.00
49.00
0.00
0.00
0.00
50.00
0.00
0.00
0.00
51.00
0.00
0.00
0.00
52.00
0.00
0.00
0.00
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.00
0.00
0.00
54.00
0.00
0.00
0.00
55.00
0.00
0.00
0.00
56.00
0.00
0.00
0.00
57.00
0.00
0.00
0.00
58.00
0.00
0.00
0.00
59.00
0.00
0.00
0.00
60.00
0.00
0.00
0.00
61.00
0.00
0.00
0.00
62.00
0.00
0.00
0.00
63.00
0.00
0.00
0.00
64.00
0.00
0.00
0.00
65.00
0.00
0.00
0.00
66.00
0.00
0.00
0.00
67.00
0.00
0.00
0.00
68.00
0.00
0.00
0.00
69.00
0.00
0.00
0.00
70.00
0.00
0.00
0.00
71.00
0.00
0.00
0.00
72.00
0.00
0.00
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 181
Summary for Link P0I#1: Post -Development P0I#1
Inflow Area = 42.987 ac, 10.69% Impervious, Inflow Depth > 2.21" for 25 Year event
Inflow = 53.45 cfs @ 12.20 hrs, Volume= 7.924 of
Primary = 53.45 cfs @ 12.20 hrs, Volume= 7.924 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Link P0I#1: Post -Development P0I#1
Hydrograph
❑ Inflow
3 ❑ Primary
�11111111111 I J I IIII
ac�-
�14-1HkH141+1-kIHHH4 41-k
fit fit �_1 H I rt 11-1 fi l �_1 H Irt I _r I l
I- �_1 �_j 14 1 �_ 14_1 �_1 1--t 14 _� I �_ I
�I HI HI H IH IHIHI HI HI IH IH IHIHI
IIIIIIIIIIIIIIIIIIIIIIIIIi
— — 6—II11111111111111111111111
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 25 Year Rainfall=6.11 "
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 182
Hydrograph for Link P0I#1: Post -Development P0I#1
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.00
0.00
0.00
2.00
0.00
0.00
0.00
3.00
0.00
0.00
0.00
4.00
0.00
0.00
0.00
5.00
0.00
0.00
0.00
6.00
0.00
0.00
0.00
7.00
0.00
0.00
0.00
8.00
0.00
0.00
0.00
9.00
0.00
0.00
0.00
10.00
0.01
0.00
0.01
11.00
0.06
0.00
0.06
12.00
25.52
0.00
25.52
13.00
19.47
0.00
19.47
14.00
8.88
0.00
8.88
15.00
6.10
0.00
6.10
16.00
4.81
0.00
4.81
17.00
4.00
0.00
4.00
18.00
3.53
0.00
3.53
19.00
3.11
0.00
3.11
20.00
2.69
0.00
2.69
21.00
2.41
0.00
2.41
22.00
2.30
0.00
2.30
23.00
2.21
0.00
2.21
24.00
2.13
0.00
2.13
25.00
0.55
0.00
0.55
26.00
0.27
0.00
0.27
27.00
0.18
0.00
0.18
28.00
0.16
0.00
0.16
29.00
0.16
0.00
0.16
30.00
0.15
0.00
0.15
31.00
0.15
0.00
0.15
32.00
0.15
0.00
0.15
33.00
0.15
0.00
0.15
34.00
0.15
0.00
0.15
35.00
0.15
0.00
0.15
36.00
0.15
0.00
0.15
37.00
0.14
0.00
0.14
38.00
0.14
0.00
0.14
39.00
0.14
0.00
0.14
40.00
0.14
0.00
0.14
41.00
0.14
0.00
0.14
42.00
0.14
0.00
0.14
43.00
0.14
0.00
0.14
44.00
0.14
0.00
0.14
45.00
0.13
0.00
0.13
46.00
0.13
0.00
0.13
47.00
0.13
0.00
0.13
48.00
0.13
0.00
0.13
49.00
0.13
0.00
0.13
50.00
0.13
0.00
0.13
51.00
0.13
0.00
0.13
52.00
0.12
0.00
0.12
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.12
0.00
0.12
54.00
0.12
0.00
0.12
55.00
0.12
0.00
0.12
56.00
0.12
0.00
0.12
57.00
0.12
0.00
0.12
58.00
0.12
0.00
0.12
59.00
0.11
0.00
0.11
60.00
0.11
0.00
0.11
61.00
0.11
0.00
0.11
62.00
0.11
0.00
0.11
63.00
0.11
0.00
0.11
64.00
0.10
0.00
0.10
65.00
0.10
0.00
0.10
66.00
0.10
0.00
0.10
67.00
0.10
0.00
0.10
68.00
0.10
0.00
0.10
69.00
0.10
0.00
0.10
70.00
0.09
0.00
0.09
71.00
0.09
0.00
0.09
72.00
0.09
0.00
0.09

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Paae 183
Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment IS: Pre #1 Runoff Area=9.570 ac 0.00% Impervious Runoff Depth=2.33"
Tc=18.5 min CN=58 Runoff=24.77 cfs 1.862 of
Subcatchment2S: Pre #2 Runoff Area=10.386 ac 0.00% Impervious Runoff Depth=2.53"
Tc=23.8 min CN=60 Runoff=25.22 cfs 2.186 of
Subcatchment3S: Pre #3 Runoff Area=16.909 ac 0.00% Impervious Runoff Depth=2.05"
Tc=23.6 min CN=55 Runoff=32.18 cfs 2.895 of
Subcatchment5S: By-Pass#2 Runoff Area=14.199 ac 0.00% Impervious Runoff Depth=2.53"
Tc=23.1 min CN=60 Runoff=35.21 cfs 2.989 of
Subcatchment6S: By-Pass#1 Runoff Area=7.040 ac 0.00% Impervious Runoff Depth=2.43"
Tc=18.5 min CN=59 Runoff=19.09 cfs 1.426 of
SubcatchmentPOI#2: Post -Development Runoff Area=1.540 ac 0.00% Impervious Runoff Depth=3.02"
Tc=17.6 min CN=65 Runoff=5.47 cfs 0.387 of
SubcatchmentPOI#3: Post -Development Runoff Area=4.635 ac 6.84% Impervious Runoff Depth=3.22"
Tc=14.9 min CN=67 Runoff=19.18 cfs 1.244 of
SubcatchmentPOI#4: Post -Development Runoff Area=1.796 ac 18.71% Impervious Runoff Depth=3.32"
Tc=25.5 min CN=68 Runoff=5.68 cfs 0.497 of
SubcatchmentPOND#1: Runoff Area=16.500 ac 18.59% Impervious Runoff Depth=3.12"
Tc=25.7 min CN=66 Runoff=48.55 cfs 4.288 of
SubcatchmentPOND#2: Post -Development Runoff Area=5.248 ac 29.12% Impervious Runoff Depth=3.63"
Tc=11.0 min CN=71 Runoff=27.89 cfs 1.588 of
Subcatchment PRE-POI#2: Pre -Development Runoff Area=4.456 ac 0.00% Impervious Runoff Depth=3.02"
Tc=18.4 min CN=65 Runoff=15.45 cfs 1.121 of
Subcatchment PRE-POI#3: Pre -Development Runoff Area=7.087 ac 1.93% Impervious Runoff Depth=3.12"
Tc=20.0 min CN=66 Runoff=24.23 cfs 1.842 of
Subcatchment PRE-POI#4: Pre -Development Runoff Area=2.545 ac 5.30% Impervious Runoff Depth=3.22"
Tc=15.9 min CN=67 Runoff=10.19 cfs 0.683 of
Pond DIET POND-1: Detention Pond #1 Peak Elev=713.73' Storage=61,014 cf Inflow=48.55 cfs 4.288 of
Primary=24.47 cfs 3.976 of Secondary=0.00 cfs 0.000 of Outflow=24.47 cfs 3.976 of
Pond DIET POND-2: Detention Pond #2 Peak Elev=700.54' Storage=23,306 cf Inflow=27.89 cfs 1.588 of
Primary=14.92 cfs 1.569 of Secondary=0.00 cfs 0.000 of Outflow=14.92 cfs 1.569 of
Link 4L: Pre-DevelopmentPOI Inflow=80.67 cfs 6.943 of
Primary=80.67 cfs 6.943 of

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 184
Link POI#1: Post-DevelopmentPO1#1
Inflow=75.24 cfs 9.960 of
Primary=75.24 cfs 9.960 of
Total Runoff Area = 101.911 ac Runoff Volume = 23.006 of Average Runoff Depth = 2.71"
94.58% Pervious = 96.390 ac 5.42% Impervious = 5.521 ac

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 185
Summary for Subcatchment 1S: Pre #1
Runoff = 24.77 cfs @ 12.12 hrs, Volume= 1.862 af, Depth= 2.33"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 50 Year Rainfall=6.89"
Area (ac) CN Description
8.570 55 Woods, Good, HSG B
1.000 79 Woods/grass comb., Good, HSG D
9.570 58 Weighted Average
9.570 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.5 Direct Entry,
Subcatchment 1S: Pre #1
Hydrograph
■ Runoff
26
1 24.77 cfs
14
1 H I �- 14-1
HI
HI
HI HI 1-46i
24
22
—' -T
17
1 H I T I
T 1
TI
HI
111-14�ii
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20
14
1 H I 14-1
HI
HI
lft bff-Ai*a��9.l70 ad
18
rt
l rt
l rt l l
fi l
HI
1°I1 �I�� f�
w 16U
3 14
H-L
I H
H H I
L I
HI
HI
HI Pnll 'I
r
0
LL12
10
H
HIH
HIH
H
H
in
H H H H L
8
IIIII
III11II1111III1111IIIIIIII111
6
4
T—
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 186
Hydrograph for Subcatchment 1S: Pre #1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.07
0.00
0.00
2.00
0.15
0.00
0.00
3.00
0.24
0.00
0.00
4.00
0.33
0.00
0.00
5.00
0.43
0.00
0.00
6.00
0.55
0.00
0.00
7.00
0.68
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.01
0.00
0.00
10.00
1.25
0.00
0.00
11.00
1.62
0.00
0.06
12.00
4.57
0.94
15.91
13.00
5.32
1.35
2.90
14.00
5.65
1.54
1.69
15.00
5.88
1.68
1.30
16.00
6.06
1.80
1.04
17.00
6.21
1.89
0.89
18.00
6.35
1.98
0.80
19.00
6.46
2.05
0.70
20.00
6.56
2.11
0.60
21.00
6.65
2.17
0.55
22.00
6.73
2.23
0.54
23.00
6.81
2.28
0.52
24.00
6.89
2.33
0.50
25.00
6.89
2.33
0.00
26.00
6.89
2.33
0.00
27.00
6.89
2.33
0.00
28.00
6.89
2.33
0.00
29.00
6.89
2.33
0.00
30.00
6.89
2.33
0.00
31.00
6.89
2.33
0.00
32.00
6.89
2.33
0.00
33.00
6.89
2.33
0.00
34.00
6.89
2.33
0.00
35.00
6.89
2.33
0.00
36.00
6.89
2.33
0.00
37.00
6.89
2.33
0.00
38.00
6.89
2.33
0.00
39.00
6.89
2.33
0.00
40.00
6.89
2.33
0.00
41.00
6.89
2.33
0.00
42.00
6.89
2.33
0.00
43.00
6.89
2.33
0.00
44.00
6.89
2.33
0.00
45.00
6.89
2.33
0.00
46.00
6.89
2.33
0.00
47.00
6.89
2.33
0.00
48.00
6.89
2.33
0.00
49.00
6.89
2.33
0.00
50.00
6.89
2.33
0.00
51.00
6.89
2.33
0.00
52.00
6.89
2.33
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.89
2.33
0.00
54.00
6.89
2.33
0.00
55.00
6.89
2.33
0.00
56.00
6.89
2.33
0.00
57.00
6.89
2.33
0.00
58.00
6.89
2.33
0.00
59.00
6.89
2.33
0.00
60.00
6.89
2.33
0.00
61.00
6.89
2.33
0.00
62.00
6.89
2.33
0.00
63.00
6.89
2.33
0.00
64.00
6.89
2.33
0.00
65.00
6.89
2.33
0.00
66.00
6.89
2.33
0.00
67.00
6.89
2.33
0.00
68.00
6.89
2.33
0.00
69.00
6.89
2.33
0.00
70.00
6.89
2.33
0.00
71.00
6.89
2.33
0.00
72.00
6.89
2.33
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 187
Summary for Subcatchment 2S: Pre #2
Runoff = 25.22 cfs @ 12.18 hrs, Volume= 2.186 af, Depth= 2.53"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 50 Year Rainfall=6.89"
Area (ac) CN Description
8.386 55 Woods, Good, HSG B
2.000 79 Woods/grass comb., Good, HSG D
10.386 60 Weighted Average
10.386 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
23.8 Direct Entry,
Subcatchment 2S: Pre #2
Hydrograph
I I I I I I I I I I I I I II I I I I I I I I I I I I ■Runoff
25.22 cfs 1
24
t I t
I t I t I
t I
tl
t-1
22
20
I I J
I I I
I I I I
I I
I
I RUnbff1Alr6A=110.386 Ad
18
H I
+ I
-�- I
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i--F 4949o# Y-0IIqrq�-72f a 8"f
314
Ill
l
— —
1 1
— —
1 I I I I
—
I I
—
I I
— 1��r
1 1 1 InII
;1c'
U.12
14
1 1 1
4-1
� 1
— 3. 1Tf rn
H H 'H 11-4 14 14
10
8
6
IL
CI
�l -4 I4 14 1�1
4
I
/
r
T'
T1
-F1
F' 1 n I-T I-T IT
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 188
Hydrograph for Subcatchment 2S: Pre #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.07
0.00
0.00
2.00
0.15
0.00
0.00
3.00
0.24
0.00
0.00
4.00
0.33
0.00
0.00
5.00
0.43
0.00
0.00
6.00
0.55
0.00
0.00
7.00
0.68
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.01
0.00
0.00
10.00
1.25
0.00
0.00
11.00
1.62
0.01
0.16
12.00
4.57
1.06
12.68
13.00
5.32
1.49
3.81
14.00
5.65
1.70
2.01
15.00
5.88
1.84
1.51
16.00
6.06
1.96
1.21
17.00
6.21
2.06
1.03
18.00
6.35
2.15
0.92
19.00
6.46
2.23
0.80
20.00
6.56
2.30
0.69
21.00
6.65
2.36
0.63
22.00
6.73
2.42
0.61
23.00
6.81
2.47
0.59
24.00
6.89
2.53
0.57
25.00
6.89
2.53
0.00
26.00
6.89
2.53
0.00
27.00
6.89
2.53
0.00
28.00
6.89
2.53
0.00
29.00
6.89
2.53
0.00
30.00
6.89
2.53
0.00
31.00
6.89
2.53
0.00
32.00
6.89
2.53
0.00
33.00
6.89
2.53
0.00
34.00
6.89
2.53
0.00
35.00
6.89
2.53
0.00
36.00
6.89
2.53
0.00
37.00
6.89
2.53
0.00
38.00
6.89
2.53
0.00
39.00
6.89
2.53
0.00
40.00
6.89
2.53
0.00
41.00
6.89
2.53
0.00
42.00
6.89
2.53
0.00
43.00
6.89
2.53
0.00
44.00
6.89
2.53
0.00
45.00
6.89
2.53
0.00
46.00
6.89
2.53
0.00
47.00
6.89
2.53
0.00
48.00
6.89
2.53
0.00
49.00
6.89
2.53
0.00
50.00
6.89
2.53
0.00
51.00
6.89
2.53
0.00
52.00
6.89
2.53
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.89
2.53
0.00
54.00
6.89
2.53
0.00
55.00
6.89
2.53
0.00
56.00
6.89
2.53
0.00
57.00
6.89
2.53
0.00
58.00
6.89
2.53
0.00
59.00
6.89
2.53
0.00
60.00
6.89
2.53
0.00
61.00
6.89
2.53
0.00
62.00
6.89
2.53
0.00
63.00
6.89
2.53
0.00
64.00
6.89
2.53
0.00
65.00
6.89
2.53
0.00
66.00
6.89
2.53
0.00
67.00
6.89
2.53
0.00
68.00
6.89
2.53
0.00
69.00
6.89
2.53
0.00
70.00
6.89
2.53
0.00
71.00
6.89
2.53
0.00
72.00
6.89
2.53
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 189
Summary for Subcatchment 3S: Pre #3
Runoff = 32.18 cfs @ 12.19 hrs, Volume= 2.895 af, Depth= 2.05"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 50 Year Rainfall=6.89"
Area (ac) CN Description
11.470 55 Woods, Good, HSG B
5.439 56 Brush, Fair, HSG B
16.909 55 Weighted Average
16.909 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
23.6 Direct Entry,
Subcatchment 3S: Pre #3
Hydrograph
■ Runoff
32
1 32.18
cfs
rt
T
fi
fil
�I
�I I�p� III
30
I�
It
It I T I
t I
tI
t-I
jkb *��rfRIlnt II6t.�*�
28
26
'� 1114
14
1 + 1 T 1
4-1
�- I
H
ft nbff lAr6d=1".909 -6d
32
1
1 1 1
4-
I
�R4� ��014P� 2f 9"
18
1-L I I
J- I
LI
�I
le
�I n
3
0 16
" 14
1 T I
LI
D
E1
7c=T3!
E1 �J 1t I-L I�
12
10
Lill,
IT I
TI
TI
TI
au
TI 1 IT IT IT IT I T
6
Tlfitfit
-I
-I - I- I ——I— T4,�I
--I
�I
�i
�j H 1� i- t I -tIT
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 190
Hydrograph for Subcatchment 3S: Pre #3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.07
0.00
0.00
2.00
0.15
0.00
0.00
3.00
0.24
0.00
0.00
4.00
0.33
0.00
0.00
5.00
0.43
0.00
0.00
6.00
0.55
0.00
0.00
7.00
0.68
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.01
0.00
0.00
10.00
1.25
0.00
0.00
11.00
1.62
0.00
0.00
12.00
4.57
0.77
14.75
13.00
5.32
1.14
5.26
14.00
5.65
1.32
2.83
15.00
5.88
1.45
2.14
16.00
6.06
1.55
1.72
17.00
6.21
1.64
1.47
18.00
6.35
1.72
1.32
19.00
6.46
1.79
1.16
20.00
6.56
1.85
0.99
21.00
6.65
1.90
0.91
22.00
6.73
1.96
0.89
23.00
6.81
2.01
0.86
24.00
6.89
2.05
0.82
25.00
6.89
2.05
0.01
26.00
6.89
2.05
0.00
27.00
6.89
2.05
0.00
28.00
6.89
2.05
0.00
29.00
6.89
2.05
0.00
30.00
6.89
2.05
0.00
31.00
6.89
2.05
0.00
32.00
6.89
2.05
0.00
33.00
6.89
2.05
0.00
34.00
6.89
2.05
0.00
35.00
6.89
2.05
0.00
36.00
6.89
2.05
0.00
37.00
6.89
2.05
0.00
38.00
6.89
2.05
0.00
39.00
6.89
2.05
0.00
40.00
6.89
2.05
0.00
41.00
6.89
2.05
0.00
42.00
6.89
2.05
0.00
43.00
6.89
2.05
0.00
44.00
6.89
2.05
0.00
45.00
6.89
2.05
0.00
46.00
6.89
2.05
0.00
47.00
6.89
2.05
0.00
48.00
6.89
2.05
0.00
49.00
6.89
2.05
0.00
50.00
6.89
2.05
0.00
51.00
6.89
2.05
0.00
52.00
6.89
2.05
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.89
2.05
0.00
54.00
6.89
2.05
0.00
55.00
6.89
2.05
0.00
56.00
6.89
2.05
0.00
57.00
6.89
2.05
0.00
58.00
6.89
2.05
0.00
59.00
6.89
2.05
0.00
60.00
6.89
2.05
0.00
61.00
6.89
2.05
0.00
62.00
6.89
2.05
0.00
63.00
6.89
2.05
0.00
64.00
6.89
2.05
0.00
65.00
6.89
2.05
0.00
66.00
6.89
2.05
0.00
67.00
6.89
2.05
0.00
68.00
6.89
2.05
0.00
69.00
6.89
2.05
0.00
70.00
6.89
2.05
0.00
71.00
6.89
2.05
0.00
72.00
6.89
2.05
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 191
Summary for Subcatchment 5S: By -Pass #2
Runoff = 35.21 cfs @ 12.17 hrs, Volume= 2.989 af, Depth= 2.53"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 50 Year Rainfall=6.89"
Area (ac) CN Description
11.999 58 Woods/grass comb., Good, HSG B
2.200 73 Brush, Good, HSG D
14.199 60 Weighted Average
14.199 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
23.1 Direct Entry,
Subcatchment 5S: By -Pass #2
Hydrograph
■ Runoff
36
32
35.21
IH 1- I
cfs
4
H
14
H H
1 H I H 1
H--
4-1
HI
HI
I
H I I H p �I�
30
28
—
1-4
—
H
14
1 H I 14-1H
1
HI
H I
Rai nbff IAr"=1IA T99 Ad
24
IH I-
4
14
I H I H I
H 1
HI
IJ�4ql°ifI Y_lt�T�_72f9�8p�f
20
1-4 1/4
14
1 HI H 1
H 1
HIHH
�n e �
3
0 18
"16
IH
4
IHIHIHIHI
HI
HI
nnn
HI H IH IH IH�
14
12
IH
14
1 H I H 1
H1
HI
HI
HI H IH IH IH 14 1
10
—
8
IH
rt
IH
M I N I
HI
HI
HI
HI H IH IH IH IH 1 H
6
—
4
H
H
H
HI
) I H I' IH I H 1 4
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 192
Hydrograph for Subcatchment 5S: By -Pass #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.07
0.00
0.00
2.00
0.15
0.00
0.00
3.00
0.24
0.00
0.00
4.00
0.33
0.00
0.00
5.00
0.43
0.00
0.00
6.00
0.55
0.00
0.00
7.00
0.68
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.01
0.00
0.00
10.00
1.25
0.00
0.00
11.00
1.62
0.01
0.23
12.00
4.57
1.06
18.31
13.00
5.32
1.49
5.11
14.00
5.65
1.70
2.73
15.00
5.88
1.84
2.06
16.00
6.06
1.96
1.65
17.00
6.21
2.06
1.40
18.00
6.35
2.15
1.25
19.00
6.46
2.23
1.10
20.00
6.56
2.30
0.94
21.00
6.65
2.36
0.86
22.00
6.73
2.42
0.83
23.00
6.81
2.47
0.80
24.00
6.89
2.53
0.77
25.00
6.89
2.53
0.00
26.00
6.89
2.53
0.00
27.00
6.89
2.53
0.00
28.00
6.89
2.53
0.00
29.00
6.89
2.53
0.00
30.00
6.89
2.53
0.00
31.00
6.89
2.53
0.00
32.00
6.89
2.53
0.00
33.00
6.89
2.53
0.00
34.00
6.89
2.53
0.00
35.00
6.89
2.53
0.00
36.00
6.89
2.53
0.00
37.00
6.89
2.53
0.00
38.00
6.89
2.53
0.00
39.00
6.89
2.53
0.00
40.00
6.89
2.53
0.00
41.00
6.89
2.53
0.00
42.00
6.89
2.53
0.00
43.00
6.89
2.53
0.00
44.00
6.89
2.53
0.00
45.00
6.89
2.53
0.00
46.00
6.89
2.53
0.00
47.00
6.89
2.53
0.00
48.00
6.89
2.53
0.00
49.00
6.89
2.53
0.00
50.00
6.89
2.53
0.00
51.00
6.89
2.53
0.00
52.00
6.89
2.53
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.89
2.53
0.00
54.00
6.89
2.53
0.00
55.00
6.89
2.53
0.00
56.00
6.89
2.53
0.00
57.00
6.89
2.53
0.00
58.00
6.89
2.53
0.00
59.00
6.89
2.53
0.00
60.00
6.89
2.53
0.00
61.00
6.89
2.53
0.00
62.00
6.89
2.53
0.00
63.00
6.89
2.53
0.00
64.00
6.89
2.53
0.00
65.00
6.89
2.53
0.00
66.00
6.89
2.53
0.00
67.00
6.89
2.53
0.00
68.00
6.89
2.53
0.00
69.00
6.89
2.53
0.00
70.00
6.89
2.53
0.00
71.00
6.89
2.53
0.00
72.00
6.89
2.53
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 193
Summary for Subcatchment 6S: By -Pass #1
Runoff = 19.09 cfs @ 12.12 hrs, Volume= 1.426 af, Depth= 2.43"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 50 Year Rainfall=6.89"
Area (ac) CN Description
6.540 58 Woods/grass comb., Good, HSG B
0.500 73 Brush, Good, HSG D
7.040 59 Weighted Average
7.040 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.5 Direct Entry,
Subcatchment 6S: By -Pass #1
Hydrograph
21
20
19
1 19.09
cfs
.
rt l rt l l fi
18
17
I�I111IL
16
15
14
13
H H
4141+1+1�
w 12
—
—
=11
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�IHIHIHIH
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LL9
8
—
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7
6
H
I� I1I 11 :E
5
4
141-�1�-14-
fil HI HI H I_1
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�I HI tRuhWlAIIII7.040Ad
�I 49 -off77 �I � � f�p�f
HI HI HI �njrjl !T87
'I'n f?m
fil HI HI H I-1 Irt Irt �L
D HI HI H I:1 11 I::1 1111
�—IHIHI H1-41-4I4141-�
----------------------------------------------------------
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 194
Hydrograph for Subcatchment 6S: By -Pass #1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.07
0.00
0.00
2.00
0.15
0.00
0.00
3.00
0.24
0.00
0.00
4.00
0.33
0.00
0.00
5.00
0.43
0.00
0.00
6.00
0.55
0.00
0.00
7.00
0.68
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.01
0.00
0.00
10.00
1.25
0.00
0.00
11.00
1.62
0.01
0.09
12.00
4.57
1.00
12.41
13.00
5.32
1.42
2.20
14.00
5.65
1.62
1.28
15.00
5.88
1.76
0.98
16.00
6.06
1.88
0.78
17.00
6.21
1.98
0.67
18.00
6.35
2.06
0.60
19.00
6.46
2.14
0.53
20.00
6.56
2.21
0.45
21.00
6.65
2.26
0.42
22.00
6.73
2.32
0.40
23.00
6.81
2.38
0.39
24.00
6.89
2.43
0.37
25.00
6.89
2.43
0.00
26.00
6.89
2.43
0.00
27.00
6.89
2.43
0.00
28.00
6.89
2.43
0.00
29.00
6.89
2.43
0.00
30.00
6.89
2.43
0.00
31.00
6.89
2.43
0.00
32.00
6.89
2.43
0.00
33.00
6.89
2.43
0.00
34.00
6.89
2.43
0.00
35.00
6.89
2.43
0.00
36.00
6.89
2.43
0.00
37.00
6.89
2.43
0.00
38.00
6.89
2.43
0.00
39.00
6.89
2.43
0.00
40.00
6.89
2.43
0.00
41.00
6.89
2.43
0.00
42.00
6.89
2.43
0.00
43.00
6.89
2.43
0.00
44.00
6.89
2.43
0.00
45.00
6.89
2.43
0.00
46.00
6.89
2.43
0.00
47.00
6.89
2.43
0.00
48.00
6.89
2.43
0.00
49.00
6.89
2.43
0.00
50.00
6.89
2.43
0.00
51.00
6.89
2.43
0.00
52.00
6.89
2.43
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.89
2.43
0.00
54.00
6.89
2.43
0.00
55.00
6.89
2.43
0.00
56.00
6.89
2.43
0.00
57.00
6.89
2.43
0.00
58.00
6.89
2.43
0.00
59.00
6.89
2.43
0.00
60.00
6.89
2.43
0.00
61.00
6.89
2.43
0.00
62.00
6.89
2.43
0.00
63.00
6.89
2.43
0.00
64.00
6.89
2.43
0.00
65.00
6.89
2.43
0.00
66.00
6.89
2.43
0.00
67.00
6.89
2.43
0.00
68.00
6.89
2.43
0.00
69.00
6.89
2.43
0.00
70.00
6.89
2.43
0.00
71.00
6.89
2.43
0.00
72.00
6.89
2.43
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 195
Summary for Subcatchment POI#2: Post -Development POI#2
Runoff = 5.47 cfs @ 12.11 hrs, Volume= 0.387 af, Depth= 3.02"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 50 Year Rainfall=6.89"
Area (ac) CN Description
1.540 65 Woods/grass comb., Fair, HSG B
1.540 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
17.6 Direct Entry,
Subcatchment POI#2: Post -Development POW
Hydrograph
6 Runoff
5.47cfs IIIIIIIIIIIIIIIIIII
�Y�II
5 I I I I I I I I I I I I I I I I I I I �d ��a1r 1R1a�n�fa�IIL�.8�'�
I� 4 14 14 4-1 4-1 t-I IRlu hbfff-AtOa .540 ad
4
Z=T;�.m in
2 ��IIIIIIIIIIIIIIIIIIIIIIIIIII
fi Irt I fit fit fit rl 11 Irt Irt Irt I rt1 fit
I IIII IIII IIIIII I it
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 196
Hydrograph for Subcatchment POI#2: Post -Development POI#2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.07
0.00
0.00
2.00
0.15
0.00
0.00
3.00
0.24
0.00
0.00
4.00
0.33
0.00
0.00
5.00
0.43
0.00
0.00
6.00
0.55
0.00
0.00
7.00
0.68
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.01
0.00
0.00
10.00
1.25
0.01
0.01
11.00
1.62
0.05
0.09
12.00
4.57
1.37
3.92
13.00
5.32
1.87
0.55
14.00
5.65
2.10
0.32
15.00
5.88
2.26
0.24
16.00
6.06
2.40
0.19
17.00
6.21
2.51
0.17
18.00
6.35
2.61
0.15
19.00
6.46
2.69
0.13
20.00
6.56
2.77
0.11
21.00
6.65
2.83
0.10
22.00
6.73
2.90
0.10
23.00
6.81
2.96
0.10
24.00
6.89
3.02
0.09
25.00
6.89
3.02
0.00
26.00
6.89
3.02
0.00
27.00
6.89
3.02
0.00
28.00
6.89
3.02
0.00
29.00
6.89
3.02
0.00
30.00
6.89
3.02
0.00
31.00
6.89
3.02
0.00
32.00
6.89
3.02
0.00
33.00
6.89
3.02
0.00
34.00
6.89
3.02
0.00
35.00
6.89
3.02
0.00
36.00
6.89
3.02
0.00
37.00
6.89
3.02
0.00
38.00
6.89
3.02
0.00
39.00
6.89
3.02
0.00
40.00
6.89
3.02
0.00
41.00
6.89
3.02
0.00
42.00
6.89
3.02
0.00
43.00
6.89
3.02
0.00
44.00
6.89
3.02
0.00
45.00
6.89
3.02
0.00
46.00
6.89
3.02
0.00
47.00
6.89
3.02
0.00
48.00
6.89
3.02
0.00
49.00
6.89
3.02
0.00
50.00
6.89
3.02
0.00
51.00
6.89
3.02
0.00
52.00
6.89
3.02
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.89
3.02
0.00
54.00
6.89
3.02
0.00
55.00
6.89
3.02
0.00
56.00
6.89
3.02
0.00
57.00
6.89
3.02
0.00
58.00
6.89
3.02
0.00
59.00
6.89
3.02
0.00
60.00
6.89
3.02
0.00
61.00
6.89
3.02
0.00
62.00
6.89
3.02
0.00
63.00
6.89
3.02
0.00
64.00
6.89
3.02
0.00
65.00
6.89
3.02
0.00
66.00
6.89
3.02
0.00
67.00
6.89
3.02
0.00
68.00
6.89
3.02
0.00
69.00
6.89
3.02
0.00
70.00
6.89
3.02
0.00
71.00
6.89
3.02
0.00
72.00
6.89
3.02
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 197
Summary for Subcatchment P0I#3: Post -Development P0I#3
Runoff = 19.18 cfs @ 12.07 hrs, Volume= 1.244 af, Depth= 3.22"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 50 Year Rainfall=6.89"
Area (ac) CN Description
4.318 65 Woods/grass comb., Fair, HSG B
0.317 98 Paved parking, HSG B
4.635 67 Weighted Average
4.318 93.16% Pervious Area
0.317 6.84% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
14.9 Direct Entry,
21
1�
1E
17
1E
1E
14
12
12
11
0 1C
LL r
f
Subcatchment P0I#3: Post -Development P0I#3
Hydrograph
1 19.18cfs Irt 1❑I TI fi
❑❑ ❑I❑I❑I❑I❑
1--t1-14111J_
1—E
4
14
1+1 +1
4-
-t
IT_Ifi
Lt
❑I❑❑
1-4 1-I-
L1+1+1+_
I -14-
-
8 10 12 14 16 18 20 22 24
fil I � � � I I i � �rt Irt Irt Irt l
fil ❑I ❑I ❑ I❑ �p� III����
❑ ❑ *�rt-Rlaint_�ll14.64'�
❑I ❑I tft"ff-lAk a�;4.635i Ad
❑ I R f 7--r
❑I ❑ ❑ �njrjl � r 'I'I
'. m m
fil ❑I ❑I ❑ 1❑ Irt Irt 6- 1�jj
❑1 ❑1 ❑1 ❑ 1❑ 11 I❑ 1111 I
❑I❑I❑I❑1❑1-I❑1414-
�I❑❑I❑❑144141❑
30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 198
Hydrograph for Subcatchment POI#3: Post -Development POI#3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.07
0.00
0.00
2.00
0.15
0.00
0.00
3.00
0.24
0.00
0.00
4.00
0.33
0.00
0.00
5.00
0.43
0.00
0.00
6.00
0.55
0.00
0.00
7.00
0.68
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.01
0.00
0.00
10.00
1.25
0.01
0.09
11.00
1.62
0.07
0.37
12.00
4.57
1.51
15.76
13.00
5.32
2.03
1.68
14.00
5.65
2.27
0.98
15.00
5.88
2.44
0.76
16.00
6.06
2.58
0.60
17.00
6.21
2.69
0.52
18.00
6.35
2.79
0.46
19.00
6.46
2.88
0.40
20.00
6.56
2.96
0.34
21.00
6.65
3.03
0.32
22.00
6.73
3.09
0.31
23.00
6.81
3.16
0.30
24.00
6.89
3.22
0.28
25.00
6.89
3.22
0.00
26.00
6.89
3.22
0.00
27.00
6.89
3.22
0.00
28.00
6.89
3.22
0.00
29.00
6.89
3.22
0.00
30.00
6.89
3.22
0.00
31.00
6.89
3.22
0.00
32.00
6.89
3.22
0.00
33.00
6.89
3.22
0.00
34.00
6.89
3.22
0.00
35.00
6.89
3.22
0.00
36.00
6.89
3.22
0.00
37.00
6.89
3.22
0.00
38.00
6.89
3.22
0.00
39.00
6.89
3.22
0.00
40.00
6.89
3.22
0.00
41.00
6.89
3.22
0.00
42.00
6.89
3.22
0.00
43.00
6.89
3.22
0.00
44.00
6.89
3.22
0.00
45.00
6.89
3.22
0.00
46.00
6.89
3.22
0.00
47.00
6.89
3.22
0.00
48.00
6.89
3.22
0.00
49.00
6.89
3.22
0.00
50.00
6.89
3.22
0.00
51.00
6.89
3.22
0.00
52.00
6.89
3.22
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.89
3.22
0.00
54.00
6.89
3.22
0.00
55.00
6.89
3.22
0.00
56.00
6.89
3.22
0.00
57.00
6.89
3.22
0.00
58.00
6.89
3.22
0.00
59.00
6.89
3.22
0.00
60.00
6.89
3.22
0.00
61.00
6.89
3.22
0.00
62.00
6.89
3.22
0.00
63.00
6.89
3.22
0.00
64.00
6.89
3.22
0.00
65.00
6.89
3.22
0.00
66.00
6.89
3.22
0.00
67.00
6.89
3.22
0.00
68.00
6.89
3.22
0.00
69.00
6.89
3.22
0.00
70.00
6.89
3.22
0.00
71.00
6.89
3.22
0.00
72.00
6.89
3.22
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 199
Summary for Subcatchment P0I#4: Post -Development P0I#4
Runoff = 5.68 cfs @ 12.20 hrs, Volume= 0.497 af, Depth= 3.32"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 50 Year Rainfall=6.89"
Area (ac) CN Description
1.460 61 >75% Grass cover, Good, HSG B
0.336 98 Paved parking, HSG B
1.796 68 Weighted Average
1.460 81.29% Pervious Area
0.336 18.71 % Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
25.5 Direct Entry,
Subcatchment P0I#4: Post -Development P0I#4
Hydrograph
I I I I
6 5.68 cfs
5 I� rt lrtIT -rI I
IIII IIIIIIIIIII
4 IIIII IIIIIIIIIII
a
0 3
u_
�-tItI t
50 Yea lka nfa11=6.84_'i
iRlunoff JArdw=1.796 ad
P�4golfflyollym�70�4PT pf
fit I� P,�nl� I
Tc r min
5
IIIIIIIIIIII�L�
IIIIIIIIIIIIII
HI H I-t I -tI -tItI-F
0 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
❑ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 200
Hydrograph for Subcatchment POI#4: Post -Development POI#4
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.07
0.00
0.00
2.00
0.15
0.00
0.00
3.00
0.24
0.00
0.00
4.00
0.33
0.00
0.00
5.00
0.43
0.00
0.00
6.00
0.55
0.00
0.00
7.00
0.68
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.01
0.00
0.00
10.00
1.25
0.02
0.04
11.00
1.62
0.09
0.13
12.00
4.57
1.58
2.92
13.00
5.32
2.11
0.85
14.00
5.65
2.35
0.42
15.00
5.88
2.53
0.31
16.00
6.06
2.67
0.25
17.00
6.21
2.79
0.21
18.00
6.35
2.89
0.19
19.00
6.46
2.98
0.16
20.00
6.56
3.06
0.14
21.00
6.65
3.13
0.13
22.00
6.73
3.19
0.12
23.00
6.81
3.26
0.12
24.00
6.89
3.32
0.11
25.00
6.89
3.32
0.00
26.00
6.89
3.32
0.00
27.00
6.89
3.32
0.00
28.00
6.89
3.32
0.00
29.00
6.89
3.32
0.00
30.00
6.89
3.32
0.00
31.00
6.89
3.32
0.00
32.00
6.89
3.32
0.00
33.00
6.89
3.32
0.00
34.00
6.89
3.32
0.00
35.00
6.89
3.32
0.00
36.00
6.89
3.32
0.00
37.00
6.89
3.32
0.00
38.00
6.89
3.32
0.00
39.00
6.89
3.32
0.00
40.00
6.89
3.32
0.00
41.00
6.89
3.32
0.00
42.00
6.89
3.32
0.00
43.00
6.89
3.32
0.00
44.00
6.89
3.32
0.00
45.00
6.89
3.32
0.00
46.00
6.89
3.32
0.00
47.00
6.89
3.32
0.00
48.00
6.89
3.32
0.00
49.00
6.89
3.32
0.00
50.00
6.89
3.32
0.00
51.00
6.89
3.32
0.00
52.00
6.89
3.32
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.89
3.32
0.00
54.00
6.89
3.32
0.00
55.00
6.89
3.32
0.00
56.00
6.89
3.32
0.00
57.00
6.89
3.32
0.00
58.00
6.89
3.32
0.00
59.00
6.89
3.32
0.00
60.00
6.89
3.32
0.00
61.00
6.89
3.32
0.00
62.00
6.89
3.32
0.00
63.00
6.89
3.32
0.00
64.00
6.89
3.32
0.00
65.00
6.89
3.32
0.00
66.00
6.89
3.32
0.00
67.00
6.89
3.32
0.00
68.00
6.89
3.32
0.00
69.00
6.89
3.32
0.00
70.00
6.89
3.32
0.00
71.00
6.89
3.32
0.00
72.00
6.89
3.32
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 201
Summary for Subcatchment POND#1: Post -Development Pond#1
Runoff = 48.55 cfs @ 12.20 hrs, Volume= 4.288 af, Depth= 3.12"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 50 Year Rainfall=6.89"
Area (ac) CN Description
0.670
98
Paved parking, HSG B
12.602
58
Woods/grass comb., Good, HSG B
1.894
98
Roofs, HSG A
0.504
98
Water Surface, HSG B
0.830
61
>75% Grass cover, Good, HSG B
16.500
66
Weighted Average
13.432
81.41 % Pervious Area
3.068
18.59% Impervious Area
Tc
(min)
Length
(feet)
Slope
(ft/ft)
Velocity Capacity
(ft/sec) (cfs)
Description
25.7
Direct Entry,
Subcatchment POND#1: Post -Development Pond#1
Hydrograph
I I
I I I
� Runoff
50
III
55 cfs
48.45
40
-i
I - _ _L I
L 1
L1
LI ftnl_off Ar61=116.500 At
35
1-44
14 1 � � I
� I
�1
� ttggf
30
1�
i ' 4
14 1 + + I
pth=3.1 ' j
H fi n° �:=25.7
0 25
min
LL
1�1
tItItItItIt-1t-1�1tt1�I-1
�N-66
20
15
1-7
7171TITIT171F-1F1
7 Ft171717IT
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34,36 38 40 42 44 46 48 50 52 54 56 58 60 62 1. 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 202
Hydrograph for Subcatchment POND#1: Post -Development Pond#1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.07
0.00
0.00
2.00
0.15
0.00
0.00
3.00
0.24
0.00
0.00
4.00
0.33
0.00
0.00
5.00
0.43
0.00
0.00
6.00
0.55
0.00
0.00
7.00
0.68
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.01
0.00
0.00
10.00
1.25
0.01
0.18
11.00
1.62
0.06
0.95
12.00
4.57
1.44
24.14
13.00
5.32
1.95
7.51
14.00
5.65
2.18
3.71
15.00
5.88
2.35
2.74
16.00
6.06
2.49
2.19
17.00
6.21
2.60
1.85
18.00
6.35
2.70
1.64
19.00
6.46
2.79
1.44
20.00
6.56
2.86
1.23
21.00
6.65
2.93
1.12
22.00
6.73
3.00
1.08
23.00
6.81
3.06
1.04
24.00
6.89
3.12
1.00
25.00
6.89
3.12
0.01
26.00
6.89
3.12
0.00
27.00
6.89
3.12
0.00
28.00
6.89
3.12
0.00
29.00
6.89
3.12
0.00
30.00
6.89
3.12
0.00
31.00
6.89
3.12
0.00
32.00
6.89
3.12
0.00
33.00
6.89
3.12
0.00
34.00
6.89
3.12
0.00
35.00
6.89
3.12
0.00
36.00
6.89
3.12
0.00
37.00
6.89
3.12
0.00
38.00
6.89
3.12
0.00
39.00
6.89
3.12
0.00
40.00
6.89
3.12
0.00
41.00
6.89
3.12
0.00
42.00
6.89
3.12
0.00
43.00
6.89
3.12
0.00
44.00
6.89
3.12
0.00
45.00
6.89
3.12
0.00
46.00
6.89
3.12
0.00
47.00
6.89
3.12
0.00
48.00
6.89
3.12
0.00
49.00
6.89
3.12
0.00
50.00
6.89
3.12
0.00
51.00
6.89
3.12
0.00
52.00
6.89
3.12
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.89
3.12
0.00
54.00
6.89
3.12
0.00
55.00
6.89
3.12
0.00
56.00
6.89
3.12
0.00
57.00
6.89
3.12
0.00
58.00
6.89
3.12
0.00
59.00
6.89
3.12
0.00
60.00
6.89
3.12
0.00
61.00
6.89
3.12
0.00
62.00
6.89
3.12
0.00
63.00
6.89
3.12
0.00
64.00
6.89
3.12
0.00
65.00
6.89
3.12
0.00
66.00
6.89
3.12
0.00
67.00
6.89
3.12
0.00
68.00
6.89
3.12
0.00
69.00
6.89
3.12
0.00
70.00
6.89
3.12
0.00
71.00
6.89
3.12
0.00
72.00
6.89
3.12
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 203
Summary for Subcatchment POND#2: Post -Development Pond #2
Runoff = 27.89 cfs @ 12.03 hrs, Volume= 1.588 af, Depth= 3.63"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 50 Year Rainfall=6.89"
Area (ac) CN Description
0.246
98
Paved parking, HSG B
3.500
58
Woods/grass comb., Good, HSG B
0.220
79
Woods/grass comb., Good, HSG D
1.010
98
Roofs, HSG A
0.272
98
Water Surface, HSG A
5.248
71
Weighted Average
3.720
70.88% Pervious Area
1.528
29.12% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
11.0 Direct Entry,
Subcatchment POND#2: Post -Development Pond #2
Hydrograph
— �l �I I� ��
Runoff
30
za
27.89
cfs T T TI T T 1 F 1 F T_
26
IH
HI Ha�r�Rlainll��.'�
24
22
Ruhbff lAwha�5.24�8 c
20
fi T T I t l fi �58"#
18
w
3 16
T 4-1 �I �qn,rje�
12
I
�ICI
11� Lin
10
+ I H I+ I H I HI HI H H 1--t IH H R H
8
6
�1LIL1LI U I-1UI_IIIT
4
r-1 I-
0 2 4 6 8 10 12 14 16 18 20 22,24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 204
Hydrograph for Subcatchment POND#2: Post -Development Pond #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.07
0.00
0.00
2.00
0.15
0.00
0.00
3.00
0.24
0.00
0.00
4.00
0.33
0.00
0.00
5.00
0.43
0.00
0.00
6.00
0.55
0.00
0.00
7.00
0.68
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.01
0.01
0.08
10.00
1.25
0.04
0.22
11.00
1.62
0.13
0.66
12.00
4.57
1.80
26.89
13.00
5.32
2.36
1.96
14.00
5.65
2.62
1.16
15.00
5.88
2.80
0.91
16.00
6.06
2.95
0.71
17.00
6.21
3.07
0.62
18.00
6.35
3.18
0.55
19.00
6.46
3.27
0.48
20.00
6.56
3.36
0.40
21.00
6.65
3.43
0.38
22.00
6.73
3.50
0.37
23.00
6.81
3.57
0.35
24.00
6.89
3.63
0.34
25.00
6.89
3.63
0.00
26.00
6.89
3.63
0.00
27.00
6.89
3.63
0.00
28.00
6.89
3.63
0.00
29.00
6.89
3.63
0.00
30.00
6.89
3.63
0.00
31.00
6.89
3.63
0.00
32.00
6.89
3.63
0.00
33.00
6.89
3.63
0.00
34.00
6.89
3.63
0.00
35.00
6.89
3.63
0.00
36.00
6.89
3.63
0.00
37.00
6.89
3.63
0.00
38.00
6.89
3.63
0.00
39.00
6.89
3.63
0.00
40.00
6.89
3.63
0.00
41.00
6.89
3.63
0.00
42.00
6.89
3.63
0.00
43.00
6.89
3.63
0.00
44.00
6.89
3.63
0.00
45.00
6.89
3.63
0.00
46.00
6.89
3.63
0.00
47.00
6.89
3.63
0.00
48.00
6.89
3.63
0.00
49.00
6.89
3.63
0.00
50.00
6.89
3.63
0.00
51.00
6.89
3.63
0.00
52.00
6.89
3.63
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.89
3.63
0.00
54.00
6.89
3.63
0.00
55.00
6.89
3.63
0.00
56.00
6.89
3.63
0.00
57.00
6.89
3.63
0.00
58.00
6.89
3.63
0.00
59.00
6.89
3.63
0.00
60.00
6.89
3.63
0.00
61.00
6.89
3.63
0.00
62.00
6.89
3.63
0.00
63.00
6.89
3.63
0.00
64.00
6.89
3.63
0.00
65.00
6.89
3.63
0.00
66.00
6.89
3.63
0.00
67.00
6.89
3.63
0.00
68.00
6.89
3.63
0.00
69.00
6.89
3.63
0.00
70.00
6.89
3.63
0.00
71.00
6.89
3.63
0.00
72.00
6.89
3.63
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 205
Summary for Subcatchment PRE-POI#2: Pre -Development P0I#2
Runoff = 15.45 cfs @ 12.11 hrs, Volume= 1.121 af, Depth= 3.02"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 50 Year Rainfall=6.89"
Area (ac) CN
Description
4.456 65
Woods/grass comb., Fair, HSG B
4.456
100.00% Pervious Area
Tc
Length
Slope
Velocity Capacity
Description
(min)
(feet)
(ft/ft)
(ft/sec)
(cfs)
18.4
Direct Entry,
Subcatchment PRE-POI#2:
Pre -Development P0I#2
Hydrograph
17
1-1 I I—�
1 1 -1
1
t-,
_t I_� It I t
Runoff
16
15.45
cfs
15
14
1-1 1-
I
J
I -L I -L1 11
1
LI
t-I
13
—1 Ft12
—
—
T T T
— — —
T
—
—
—
1Rlur�iblA�-�aO.#6d
— — — — — — —
11
rt
rt rt I T I
fi 1
fil
"Off Y-04T��'� fvl�
N 10
$ o
-I�
H I-
I + + I
i- I
�I
�I
�I nl° I e� 'I
-
R rnZn-
v
LL
7
JA
1-4
4
1 � I
-k1
�I
�I
�1 N 1-4 14 14 �L"�
6
5
I� I_
I� L
LI
LI
LI
LI U I� I� I� 11 11
4
3
ICI
_
7
17 ITI TI
�I
�I
�l
Fl n l� 17 l7 17 lTl
2
t I t
fi
�
'1-1 N 1-1 1-t I-f
1
14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 206
Hydrograph for Subcatchment PRE-POI#2: Pre -Development POI#2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.07
0.00
0.00
2.00
0.15
0.00
0.00
3.00
0.24
0.00
0.00
4.00
0.33
0.00
0.00
5.00
0.43
0.00
0.00
6.00
0.55
0.00
0.00
7.00
0.68
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.01
0.00
0.00
10.00
1.25
0.01
0.04
11.00
1.62
0.05
0.26
12.00
4.57
1.37
10.67
13.00
5.32
1.87
1.62
14.00
5.65
2.10
0.93
15.00
5.88
2.26
0.71
16.00
6.06
2.40
0.56
17.00
6.21
2.51
0.48
18.00
6.35
2.61
0.43
19.00
6.46
2.69
0.38
20.00
6.56
2.77
0.32
21.00
6.65
2.83
0.30
22.00
6.73
2.90
0.29
23.00
6.81
2.96
0.28
24.00
6.89
3.02
0.26
25.00
6.89
3.02
0.00
26.00
6.89
3.02
0.00
27.00
6.89
3.02
0.00
28.00
6.89
3.02
0.00
29.00
6.89
3.02
0.00
30.00
6.89
3.02
0.00
31.00
6.89
3.02
0.00
32.00
6.89
3.02
0.00
33.00
6.89
3.02
0.00
34.00
6.89
3.02
0.00
35.00
6.89
3.02
0.00
36.00
6.89
3.02
0.00
37.00
6.89
3.02
0.00
38.00
6.89
3.02
0.00
39.00
6.89
3.02
0.00
40.00
6.89
3.02
0.00
41.00
6.89
3.02
0.00
42.00
6.89
3.02
0.00
43.00
6.89
3.02
0.00
44.00
6.89
3.02
0.00
45.00
6.89
3.02
0.00
46.00
6.89
3.02
0.00
47.00
6.89
3.02
0.00
48.00
6.89
3.02
0.00
49.00
6.89
3.02
0.00
50.00
6.89
3.02
0.00
51.00
6.89
3.02
0.00
52.00
6.89
3.02
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.89
3.02
0.00
54.00
6.89
3.02
0.00
55.00
6.89
3.02
0.00
56.00
6.89
3.02
0.00
57.00
6.89
3.02
0.00
58.00
6.89
3.02
0.00
59.00
6.89
3.02
0.00
60.00
6.89
3.02
0.00
61.00
6.89
3.02
0.00
62.00
6.89
3.02
0.00
63.00
6.89
3.02
0.00
64.00
6.89
3.02
0.00
65.00
6.89
3.02
0.00
66.00
6.89
3.02
0.00
67.00
6.89
3.02
0.00
68.00
6.89
3.02
0.00
69.00
6.89
3.02
0.00
70.00
6.89
3.02
0.00
71.00
6.89
3.02
0.00
72.00
6.89
3.02
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 207
Summary for Subcatchment PRE-POI#3: Pre -Development P0I#3
Runoff = 24.23 cfs @ 12.13 hrs, Volume= 1.842 af, Depth= 3.12"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 50 Year Rainfall=6.89"
Area (ac)
CN Description
6.950
65 Woods/grass comb., Fair,
HSG B
0.137
98 Paved roads w/curbs & sewers, HSG B
7.087
66 Weighted Average
6.950
98.07% Pervious Area
0.137
1.93% Impervious Area
Tc Length Slope Velocity Capacity
Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
20.0
Direct Entry,
Subcatchment PRE-POI#3: Pre -Development P0I#3
Hydrograph
I� I I, ,I� -ICI
�I �I —1 � I , I IT1I
■ Runoff
26
24
24.23 cfs
ITITITIfiIfiI
r-Itl rlI�
� 11T 4
22
I
I
III I I I I I I I I I I
— — —
I I I I� ���R�a�n�11��.�8J'�
20
4 1 T 1 T I T I-
-I H 1RU"ff-AlirdaO-7.087 -At
18
T IT IT T T
TI �490# Y°lum�� 1 }84"#
16
3 14
�1 �n,r e� '
12
10
I� ITITITItItiH�
Ci6min
N I 1-111 rt�L "
8
11111111111111111111111161+1
TI �I
LITITI771
-I H H 111� 14 I4ITIT4
2'
TI TI T IT IT IT ITITI
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 208
Hydrograph for Subcatchment PRE-POI#3: Pre -Development POI#3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.07
0.00
0.00
2.00
0.15
0.00
0.00
3.00
0.24
0.00
0.00
4.00
0.33
0.00
0.00
5.00
0.43
0.00
0.00
6.00
0.55
0.00
0.00
7.00
0.68
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.01
0.00
0.00
10.00
1.25
0.01
0.09
11.00
1.62
0.06
0.46
12.00
4.57
1.44
15.70
13.00
5.32
1.95
2.73
14.00
5.65
2.18
1.53
15.00
5.88
2.35
1.16
16.00
6.06
2.49
0.92
17.00
6.21
2.60
0.78
18.00
6.35
2.70
0.70
19.00
6.46
2.79
0.61
20.00
6.56
2.86
0.52
21.00
6.65
2.93
0.48
22.00
6.73
3.00
0.46
23.00
6.81
3.06
0.45
24.00
6.89
3.12
0.43
25.00
6.89
3.12
0.00
26.00
6.89
3.12
0.00
27.00
6.89
3.12
0.00
28.00
6.89
3.12
0.00
29.00
6.89
3.12
0.00
30.00
6.89
3.12
0.00
31.00
6.89
3.12
0.00
32.00
6.89
3.12
0.00
33.00
6.89
3.12
0.00
34.00
6.89
3.12
0.00
35.00
6.89
3.12
0.00
36.00
6.89
3.12
0.00
37.00
6.89
3.12
0.00
38.00
6.89
3.12
0.00
39.00
6.89
3.12
0.00
40.00
6.89
3.12
0.00
41.00
6.89
3.12
0.00
42.00
6.89
3.12
0.00
43.00
6.89
3.12
0.00
44.00
6.89
3.12
0.00
45.00
6.89
3.12
0.00
46.00
6.89
3.12
0.00
47.00
6.89
3.12
0.00
48.00
6.89
3.12
0.00
49.00
6.89
3.12
0.00
50.00
6.89
3.12
0.00
51.00
6.89
3.12
0.00
52.00
6.89
3.12
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.89
3.12
0.00
54.00
6.89
3.12
0.00
55.00
6.89
3.12
0.00
56.00
6.89
3.12
0.00
57.00
6.89
3.12
0.00
58.00
6.89
3.12
0.00
59.00
6.89
3.12
0.00
60.00
6.89
3.12
0.00
61.00
6.89
3.12
0.00
62.00
6.89
3.12
0.00
63.00
6.89
3.12
0.00
64.00
6.89
3.12
0.00
65.00
6.89
3.12
0.00
66.00
6.89
3.12
0.00
67.00
6.89
3.12
0.00
68.00
6.89
3.12
0.00
69.00
6.89
3.12
0.00
70.00
6.89
3.12
0.00
71.00
6.89
3.12
0.00
72.00
6.89
3.12
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 209
Summary for Subcatchment PRE-POI#4: Pre -Development P0I#4
Runoff = 10.19 cfs @ 12.09 hrs, Volume= 0.683 af, Depth= 3.22"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 50 Year Rainfall=6.89"
Area (ac) CN Description
2.410 65 Woods/grass comb., Fair, HSG B
0.135 98 Paved parking, HSG B
2.545 67 Weighted Average
2.410 94.70% Pervious Area
0.135 5.30% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
15.9 Direct Entry,
Subcatchment PRE-POI#4: Pre -Development P0I#4
Hydrograph
I� I�
1 4-1 TI �-1 �-I I--1 1-4 I 14 141
11
10
10.19
cfs
TI �I �I H I�� 1111�ir�
9
IT 1
T 17 1 T 1 T I T 1 TI TI �b ��7Rlalin6ll=6.84'i
8
1
1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 IRuhbff lAtdaO2.545 Ad
7
3 6
It
-1 11 11 11 T T LI Run° e� h
�c
0
L 5
min'
4 14 1 _� I �_ I �_I N IA I- 14 �L-6
4
fi1tItItItlTIt-It_1 N I_1IIt
3
2
IT
171TITIT17-ITITI 7 T T
1
I
IIIIIIIIIIIIIIII II
0
0
2 4 6 8 10 12 14
16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 4850 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 210
Hydrograph for Subcatchment PRE-POI#4: Pre -Development POI#4
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.07
0.00
0.00
2.00
0.15
0.00
0.00
3.00
0.24
0.00
0.00
4.00
0.33
0.00
0.00
5.00
0.43
0.00
0.00
6.00
0.55
0.00
0.00
7.00
0.68
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.01
0.00
0.00
10.00
1.25
0.01
0.05
11.00
1.62
0.07
0.20
12.00
4.57
1.51
8.02
13.00
5.32
2.03
0.93
14.00
5.65
2.27
0.54
15.00
5.88
2.44
0.42
16.00
6.06
2.58
0.33
17.00
6.21
2.69
0.28
18.00
6.35
2.79
0.25
19.00
6.46
2.88
0.22
20.00
6.56
2.96
0.19
21.00
6.65
3.03
0.17
22.00
6.73
3.09
0.17
23.00
6.81
3.16
0.16
24.00
6.89
3.22
0.16
25.00
6.89
3.22
0.00
26.00
6.89
3.22
0.00
27.00
6.89
3.22
0.00
28.00
6.89
3.22
0.00
29.00
6.89
3.22
0.00
30.00
6.89
3.22
0.00
31.00
6.89
3.22
0.00
32.00
6.89
3.22
0.00
33.00
6.89
3.22
0.00
34.00
6.89
3.22
0.00
35.00
6.89
3.22
0.00
36.00
6.89
3.22
0.00
37.00
6.89
3.22
0.00
38.00
6.89
3.22
0.00
39.00
6.89
3.22
0.00
40.00
6.89
3.22
0.00
41.00
6.89
3.22
0.00
42.00
6.89
3.22
0.00
43.00
6.89
3.22
0.00
44.00
6.89
3.22
0.00
45.00
6.89
3.22
0.00
46.00
6.89
3.22
0.00
47.00
6.89
3.22
0.00
48.00
6.89
3.22
0.00
49.00
6.89
3.22
0.00
50.00
6.89
3.22
0.00
51.00
6.89
3.22
0.00
52.00
6.89
3.22
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.89
3.22
0.00
54.00
6.89
3.22
0.00
55.00
6.89
3.22
0.00
56.00
6.89
3.22
0.00
57.00
6.89
3.22
0.00
58.00
6.89
3.22
0.00
59.00
6.89
3.22
0.00
60.00
6.89
3.22
0.00
61.00
6.89
3.22
0.00
62.00
6.89
3.22
0.00
63.00
6.89
3.22
0.00
64.00
6.89
3.22
0.00
65.00
6.89
3.22
0.00
66.00
6.89
3.22
0.00
67.00
6.89
3.22
0.00
68.00
6.89
3.22
0.00
69.00
6.89
3.22
0.00
70.00
6.89
3.22
0.00
71.00
6.89
3.22
0.00
72.00
6.89
3.22
0.00

Weddington Acres HydroCAD Revised Layout Type 11 24-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 211
Summary for Pond DET POND-1: Detention Pond #1
Inflow Area = 16.500 ac, 18.59% Impervious, Inflow Depth = 3.12" for 50 Year event
Inflow = 48.55 cfs @ 12.20 hrs, Volume= 4.288 of
Outflow = 24.47 cfs @ 12.47 hrs, Volume= 3.976 af, Atten= 50%, Lag= 16.4 min
Primary = 24.47 cfs @ 12.47 hrs, Volume= 3.976 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Peak Elev= 713.73' @ 12.47 hrs Surf.Area= 17,065 sf Storage= 61,014 cf
Plug -Flow detention time= 237.1 min calculated for 3.976 of (93% of inflow)
Center -of -Mass det. time= 198.0 min ( 1,053.5 - 855.5 )
Volume Invert Avail.Storage Storage Description
#1 708.00' 104,832 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
708.00 2,289 0 0
709.00 5,540 3,915 3,915
710.00 8,705 7,123 11,037
711.00 11,744 10,225 21,262
712.00 14,012 12,878 34,140
713.00 15,752 14,882 49,022
714.00 17,548 16,650 65,672
715.00 19,401 18,475 84,146
716.00 21,970 20,686 104,832
Device Routing Invert Outlet Devices
#1 Primary 707.00' 36.0" Round Culvert
L= 111.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 707.00' / 705.00' S= 0.0180 '/' Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 7.07 sf
#2 Device 1 708.00' 1.3" Vert. WQ C= 0.600
#3 Device 1 711.33' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 2.67
Width (feet) 2.00 2.00
#4 Device 1 714.00' 48.0" x 48.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 715.00' 18.0' long x 18.0' 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) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Primary OutFlow Max=24.38 cfs @ 12.47 hrs HW=713.72' (Free Discharge)
L1=Culvert (Passes 24.38 cfs of 77.80 cfs potential flow)
2=WQ (Orifice Controls 0.11 cfs @ 11.47 fps)
3=Custom Weir/Orifice (Weir Controls 24.27 cfs @ 5.07 fps)
4=Orifi ce/G rate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=708.00' (Free Discharge)
L5= Broad -Crested Rectangular Weir( Controls 0.00 cfs)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 212
Pond DET POND-1: Detention Pond #1
Hydrograph
IIIIIIIIIIIII III IIIII� IIIIIII
/
48.55 cfs
L I
L1
I-
L 1
inflow Area=116� 50101 a�cl
LInflow
ow
ndary
50
/
I +
1 + I
H
14
4-1
Peak Elev=713.73'
45 F/
IT 7
1-1
FT
T I
C
r§�4ragg=f 1,,P J 4 rf
40
/
35
/
1
30
/
24.47 cfs
1-1
U
I
I- J
I �—I 1--� I �- I U
0 25
/
1�
I�
fi 1
H
It I -I H I t I _I 1-f
LL
20
/ III
I�IIIIIIIIIIIIIIIIIIIIIIIIII
15
/
10
IIIIIIIIIIIIIIIIIIIIII
Pond DET POND-1: Detention Pond #1
Stage -Discharge
716
/I715
1
•
1:
1
1
60 80 100 120
Discharge (cfs)
140
❑ Total
❑ Primary
❑ Secondary

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 213
m
713
d
c 712
d
w 711
708 Q
0
Pond DET POND-1: Detention Pond #1
Stage -Area -Storage
Surface/HorizontaiMetted Area (sq-ft)
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000
40,000 50,000 60,000 70,000 80,000 90,000 100,000
Storage (cubic -feet)
Surface
❑ Storage

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 214
Hydrograph for Pond DET POND-1: Detention Pond #1
Time
Inflow
Storage
Elevation
Outflow
Primary
Secondary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
(cfs)
(cfs)
0.00
0.00
0
708.00
0.00
0.00
0.00
2.50
0.00
0
708.00
0.00
0.00
0.00
5.00
0.00
0
708.00
0.00
0.00
0.00
7.50
0.00
0
708.00
0.00
0.00
0.00
10.00
0.18
173
708.07
0.01
0.01
0.00
12.50
22.30
60,894
713.72
24.37
24.37
0.00
15.00
2.74
33,371
711.94
3.25
3.25
0.00
17.50
1.75
30,749
711.75
1.89
1.89
0.00
20.00
1.23
29,581
711.67
1.36
1.36
0.00
22.50
1.06
28,934
711.62
1.09
1.09
0.00
25.00
0.01
27,250
711.49
0.50
0.50
0.00
27.50
0.00
25,385
711.34
0.09
0.09
0.00
30.00
0.00
24,656
711.28
0.08
0.08
0.00
32.50
0.00
23,942
711.22
0.08
0.08
0.00
35.00
0.00
23,234
711.17
0.08
0.08
0.00
37.50
0.00
22,533
711.11
0.08
0.08
0.00
40.00
0.00
21,838
711.05
0.08
0.08
0.00
42.50
0.00
21,150
710.99
0.08
0.08
0.00
45.00
0.00
20,469
710.93
0.08
0.08
0.00
47.50
0.00
19,795
710.87
0.07
0.07
0.00
50.00
0.00
19,128
710.81
0.07
0.07
0.00
52.50
0.00
18,468
710.75
0.07
0.07
0.00
55.00
0.00
17,815
710.69
0.07
0.07
0.00
57.50
0.00
17,170
710.63
0.07
0.07
0.00
60.00
0.00
16,532
710.57
0.07
0.07
0.00
62.50
0.00
15,902
710.51
0.07
0.07
0.00
65.00
0.00
15,280
710.45
0.07
0.07
0.00
67.50
0.00
14,665
710.39
0.07
0.07
0.00
70.00
0.00
14,059
710.33
0.07
0.07
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 215
Stage -Discharge for Pond DET POND-1: Detention Pond #1
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
708.00
0.00
0.00
0.00
708.10
0.01
0.01
0.00
708.20
0.02
0.02
0.00
708.30
0.02
0.02
0.00
708.40
0.03
0.03
0.00
708.50
0.03
0.03
0.00
708.60
0.03
0.03
0.00
708.70
0.04
0.04
0.00
708.80
0.04
0.04
0.00
708.90
0.04
0.04
0.00
709.00
0.04
0.04
0.00
709.10
0.05
0.05
0.00
709.20
0.05
0.05
0.00
709.30
0.05
0.05
0.00
709.40
0.05
0.05
0.00
709.50
0.05
0.05
0.00
709.60
0.06
0.06
0.00
709.70
0.06
0.06
0.00
709.80
0.06
0.06
0.00
709.90
0.06
0.06
0.00
710.00
0.06
0.06
0.00
710.10
0.06
0.06
0.00
710.20
0.07
0.07
0.00
710.30
0.07
0.07
0.00
710.40
0.07
0.07
0.00
710.50
0.07
0.07
0.00
710.60
0.07
0.07
0.00
710.70
0.07
0.07
0.00
710.80
0.07
0.07
0.00
710.90
0.07
0.07
0.00
711.00
0.08
0.08
0.00
711.10
0.08
0.08
0.00
711.20
0.08
0.08
0.00
711.30
0.08
0.08
0.00
711.40
0.20
0.20
0.00
711.50
0.54
0.54
0.00
711.60
1.00
1.00
0.00
711.70
1.56
1.56
0.00
711.80
2.20
2.20
0.00
711.90
2.91
2.91
0.00
712.00
3.68
3.68
0.00
712.10
4.51
4.51
0.00
712.20
5.41
5.41
0.00
712.30
6.35
6.35
0.00
712.40
7.34
7.34
0.00
712.50
8.38
8.38
0.00
712.60
9.47
9.47
0.00
712.70
10.60
10.60
0.00
712.80
11.77
11.77
0.00
712.90
12.98
12.98
0.00
713.00
14.23
14.23
0.00
713.10
15.52
15.52
0.00
713.20
16.85
16.85
0.00
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
713.30
18.21
18.21
0.00
713.40
19.61
19.61
0.00
713.50
21.04
21.04
0.00
713.60
22.51
22.51
0.00
713.70
24.00
24.00
0.00
713.80
25.53
25.53
0.00
713.90
27.09
27.09
0.00
714.00
28.68
28.68
0.00
714.10
31.75
31.75
0.00
714.20
36.05
36.05
0.00
714.30
41.16
41.16
0.00
714.40
46.92
46.92
0.00
714.50
53.26
53.26
0.00
714.60
60.12
60.12
0.00
714.70
67.44
67.44
0.00
714.80
75.20
75.20
0.00
714.90
83.38
83.38
0.00
715.00
86.77
86.77
0.00
715.10
88.96
87.44
1.53
715.20
92.41
88.10
4.31
715.30
96.71
88.75
7.96
715.40
101.70
89.40
12.29
715.50
107.23
90.05
17.18
715.60
113.28
90.69
22.59
715.70
119.47
91.33
28.15
715.80
125.96
91.96
34.00
715.90
133.08
92.59
40.50
716.00
140.55
93.21
47.34

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 216
Stage -Area -Storage for Pond DET POND-1: Detention Pond #1
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
708.00
2,289
0
708.10
2,614
245
708.20
2,939
523
708.30
3,264
833
708.40
3,589
1,176
708.50
3,915
1,551
708.60
4,240
1,959
708.70
4,565
2,399
708.80
4,890
2,872
708.90
5,215
3,377
709.00
5,540
3,915
709.10
5,857
4,484
709.20
6,173
5,086
709.30
6,489
5,719
709.40
6,806
6,384
709.50
7,123
7,080
709.60
7,439
7,808
709.70
7,756
8,568
709.80
8,072
9,359
709.90
8,388
10,182
710.00
8,705
11,037
710.10
9,009
11,923
710.20
9,313
12,839
710.30
9,617
13,785
710.40
9,921
14,762
710.50
10,225
15,769
710.60
10,528
16,807
710.70
10,832
17,875
710.80
11,136
18,973
710.90
11,440
20,102
711.00
11,744
21,262
711.10
11,971
22,447
711.20
12,198
23,656
711.30
12,424
24,887
711.40
12,651
26,141
711.50
12,878
27,417
711.60
13,105
28,716
711.70
13,332
30,038
711.80
13,558
31,382
711.90
13,785
32,750
712.00
14,012
34,140
712.10
14,186
35,549
712.20
14,360
36,977
712.30
14,534
38,421
712.40
14,708
39,883
712.50
14,882
41,363
712.60
15,056
42,860
712.70
15,230
44,374
712.80
15,404
45,906
712.90
15,578
47,455
713.00
15,752
49,022
713.10
15,932
50,606
713.20
16,111
52,208
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
713.30
16,291
53,828
713.40
16,470
55,466
713.50
16,650
57,122
713.60
16,830
58,796
713.70
17,009
60,488
713.80
17,189
62,198
713.90
17,368
63,926
714.00
17,548
65,672
714.10
17,733
67,436
714.20
17,919
69,218
714.30
18,104
71,019
714.40
18,289
72,839
714.50
18,475
74,677
714.60
18,660
76,534
714.70
18,845
78,409
714.80
19,030
80,303
714.90
19,216
82,215
715.00
19,401
84,146
715.10
19,658
86,099
715.20
19,915
88,078
715.30
20,172
90,082
715.40
20,429
92,112
715.50
20,686
94,168
715.60
20,942
96,249
715.70
21,199
98,356
715.80
21,456
100,489
715.90
21,713
102,647
716.00
21,970
104,832

Weddington Acres HydroCAD Revised Layout Type 11 24-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 217
Summary for Pond DET POND-2: Detention Pond #2
Inflow Area = 5.248 ac, 29.12% Impervious, Inflow Depth = 3.63" for 50 Year event
Inflow = 27.89 cfs @ 12.03 hrs, Volume= 1.588 of
Outflow = 14.92 cfs @ 12.16 hrs, Volume= 1.569 af, Atten= 47%, Lag= 7.6 min
Primary = 14.92 cfs @ 12.16 hrs, Volume= 1.569 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Peak Elev= 700.54' @ 12.16 hrs Surf.Area= 9,007 sf Storage= 23,306 cf
Plug -Flow detention time= 294.9 min calculated for 1.569 of (99% of inflow)
Center -of -Mass det. time= 287.8 min ( 1,118.6 - 830.9 )
Volume Invert Avail.Storage Storage Description
#1 697.00' 49,496 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
697.00 3,325 0 0
698.00 5,881 4,603 4,603
699.00 6,979 6,430 11,033
700.00 8,219 7,599 18,632
701.00 9,671 8,945 27,577
702.00 11,155 10,413 37,990
703.00 11,857 11,506 49,496
Device Routing Invert Outlet Devices
#1 Primary 696.00' 24.0" Round RCP -Round 24"
L= 66.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 696.00' / 695.00' S= 0.0152 '/' Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 3.14 sf
#2 Device 1 697.00' 1.5" Vert. WQ C= 0.600
#3 Device 1 698.82' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 2.18
Width (feet) 2.00 2.00
#4 Device 1 701.00' 48.0" x 48.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 702.00' 10.0' 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=14.84 cfs @ 12.16 hrs HW=700.54' (Free Discharge)
L1=RCP_Round 24" (Passes 14.84 cfs of 28.45 cfs potential flow)
2=WQ (Orifice Controls 0.11 cfs @ 8.97 fps)
3=Custom Weir/Orifice (Weir Controls 14.73 cfs @ 4.29 fps)
4=Orifi ce/G rate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=697.00' (Free Discharge)
L5= Broad -Crested Rectangular Weir( Controls 0.00 cfs)

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 218
Pond DET POND-2: Detention Pond #2
Hydrograph
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4
/
0.00 cfs
0
0
2 4 6
8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
Pond DET POND-2: Detention Pond #2
Stage -Discharge
0 5 10 15 20 25 30 35 40 45 50 55 60
Discharge (cfs)
■ Inflow
■ outflow
■ Primary
■ Secondary
■ Total
■ Primary
■ Secondary

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 219
Pond DET POND-2: Detention Pond #2
Stage -Area -Storage
Surface/Horizontal/Wetted Area (sq-ft)
1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000
Storage (cubic -feet)
Surface
❑ Storage

Weddington Acres HydroCAD Revised Layout Type // 24-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 220
Hydrograph for Pond DET POND-2: Detention Pond #2
Time
Inflow
Storage
Elevation
Outflow
Primary
Secondary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
(cfs)
(cfs)
0.00
0.00
0
697.00
0.00
0.00
0.00
2.50
0.00
0
697.00
0.00
0.00
0.00
5.00
0.00
0
697.00
0.00
0.00
0.00
7.50
0.00
0
697.00
0.00
0.00
0.00
10.00
0.22
596
697.17
0.02
0.02
0.00
12.50
3.51
17,568
699.87
7.14
7.14
0.00
15.00
0.91
11,656
699.09
1.00
1.00
0.00
17.50
0.59
11,091
699.01
0.62
0.62
0.00
20.00
0.40
10,781
698.96
0.44
0.44
0.00
22.50
0.36
10,634
698.94
0.37
0.37
0.00
25.00
0.00
9,998
698.85
0.12
0.12
0.00
27.50
0.00
9,260
698.74
0.08
0.08
0.00
30.00
0.00
8,582
698.64
0.07
0.07
0.00
32.50
0.00
7,925
698.54
0.07
0.07
0.00
35.00
0.00
7,290
698.44
0.07
0.07
0.00
37.50
0.00
6,677
698.34
0.07
0.07
0.00
40.00
0.00
6,087
698.25
0.06
0.06
0.00
42.50
0.00
5,520
698.15
0.06
0.06
0.00
45.00
0.00
4,976
698.06
0.06
0.06
0.00
47.50
0.00
4,456
697.97
0.06
0.06
0.00
50.00
0.00
3,961
697.89
0.05
0.05
0.00
52.50
0.00
3,490
697.80
0.05
0.05
0.00
55.00
0.00
3,046
697.72
0.05
0.05
0.00
57.50
0.00
2,630
697.64
0.04
0.04
0.00
60.00
0.00
2,242
697.56
0.04
0.04
0.00
62.50
0.00
1,884
697.48
0.04
0.04
0.00
65.00
0.00
1,557
697.40
0.03
0.03
0.00
67.50
0.00
1,262
697.34
0.03
0.03
0.00
70.00
0.00
1,002
697.27
0.03
0.03
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 221
Stage -Discharge for Pond DET POND-2: Detention Pond #2
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
697.00
0.00
0.00
0.00
697.10
0.01
0.01
0.00
697.20
0.02
0.02
0.00
697.30
0.03
0.03
0.00
697.40
0.03
0.03
0.00
697.50
0.04
0.04
0.00
697.60
0.04
0.04
0.00
697.70
0.05
0.05
0.00
697.80
0.05
0.05
0.00
697.90
0.05
0.05
0.00
698.00
0.06
0.06
0.00
698.10
0.06
0.06
0.00
698.20
0.06
0.06
0.00
698.30
0.07
0.07
0.00
698.40
0.07
0.07
0.00
698.50
0.07
0.07
0.00
698.60
0.07
0.07
0.00
698.70
0.08
0.08
0.00
698.80
0.08
0.08
0.00
698.90
0.23
0.23
0.00
699.00
0.58
0.58
0.00
699.10
1.05
1.05
0.00
699.20
1.62
1.62
0.00
699.30
2.27
2.27
0.00
699.40
2.98
2.98
0.00
699.50
3.77
3.77
0.00
699.60
4.61
4.61
0.00
699.70
5.50
5.50
0.00
699.80
6.45
6.45
0.00
699.90
7.45
7.45
0.00
700.00
8.50
8.50
0.00
700.10
9.59
9.59
0.00
700.20
10.72
10.72
0.00
700.30
11.90
11.90
0.00
700.40
13.12
13.12
0.00
700.50
14.37
14.37
0.00
700.60
15.67
15.67
0.00
700.70
17.00
17.00
0.00
700.80
18.36
18.36
0.00
700.90
19.76
19.76
0.00
701.00
21.20
21.20
0.00
701.10
24.12
24.12
0.00
701.20
28.26
28.26
0.00
701.30
31.37
31.37
0.00
701.40
31.73
31.73
0.00
701.50
32.09
32.09
0.00
701.60
32.44
32.44
0.00
701.70
32.79
32.79
0.00
701.80
33.14
33.14
0.00
701.90
33.48
33.48
0.00
702.00
33.82
33.82
0.00
702.10
34.95
34.16
0.79
702.20
36.72
34.49
2.23
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
702.30
38.97
34.82
4.15
702.40
41.63
35.15
6.48
702.50
44.77
35.48
9.30
702.60
48.34
35.80
12.55
702.70
51.90
36.11
15.78
702.80
55.68
36.43
19.25
702.90
59.67
36.74
22.92
703.00
63.85
37.05
26.80

Weddington Acres HydroCAD Revised Layout Type // 24-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 222
Stage -Area -Storage for Pond DET POND-2: Detention Pond #2
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
697.00
3,325
0
697.10
3,581
345
697.20
3,836
716
697.30
4,092
1,113
697.40
4,347
1,534
697.50
4,603
1,982
697.60
4,859
2,455
697.70
5,114
2,954
697.80
5,370
3,478
697.90
5,625
4,028
698.00
5,881
4,603
698.10
5,991
5,197
698.20
6,101
5,801
698.30
6,210
6,417
698.40
6,320
7,043
698.50
6,430
7,681
698.60
6,540
8,329
698.70
6,650
8,989
698.80
6,759
9,659
698.90
6,869
10,341
699.00
6,979
11,033
699.10
7,103
11,737
699.20
7,227
12,454
699.30
7,351
13,182
699.40
7,475
13,924
699.50
7,599
14,678
699.60
7,723
15,444
699.70
7,847
16,222
699.80
7,971
17,013
699.90
8,095
17,816
700.00
8,219
18,632
700.10
8,364
19,461
700.20
8,509
20,305
700.30
8,655
21,163
700.40
8,800
22,036
700.50
8,945
22,923
700.60
9,090
23,825
700.70
9,235
24,741
700.80
9,381
25,672
700.90
9,526
26,617
701.00
9,671
27,577
701.10
9,819
28,552
701.20
9,968
29,541
701.30
10,116
30,545
701.40
10,265
31,564
701.50
10,413
32,598
701.60
10,561
33,647
701.70
10,710
34,710
701.80
10,858
35,789
701.90
11,007
36,882
702.00
11,155
37,990
702.10
11,225
39,109
702.20
11,295
40,235
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
702.30
11,366
41,368
702.40
11,436
42,508
702.50
11,506
43,655
702.60
11,576
44,809
702.70
11,646
45,970
702.80
11,717
47,139
702.90
11,787
48,314
703.00
11,857
49,496

Weddington Acres HydroCAD Revised Layout Type // 24-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 223
Summary for Link 4L: Pre -Development POI
Inflow Area = 36.865 ac, 0.00% Impervious, Inflow Depth = 2.26" for 50 Year event
Inflow = 80.67 cfs @ 12.16 hrs, Volume= 6.943 of
Primary = 80.67 cfs @ 12.16 hrs, Volume= 6.943 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Link 4L: Pre -Development POI
Hydrograph
_1_ 7
IT I
T I
_I
H
17
17 11
T
IT
❑Inflow
❑Primary
85
80.67 cfs
I
T I
T-I
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I7
17
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I J�6_�+ I JA
5—a
80
75
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70
65
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rt
I rt I t I
t I
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60
55
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fi
H
H
�5
3 45
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HI
HI
H
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H
IHIHIHIH
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1-I
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H
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H
H
H
I + I + I
35
30
I-I4-IHHI4I41
1I-IHHHI4I4I4-
25
_
I4
1-IHHH1-LI4I1-IHH141
15
10
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 224
Hydrograph for Link 4L: Pre -Development POI
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.00
0.00
0.00
2.00
0.00
0.00
0.00
3.00
0.00
0.00
0.00
4.00
0.00
0.00
0.00
5.00
0.00
0.00
0.00
6.00
0.00
0.00
0.00
7.00
0.00
0.00
0.00
8.00
0.00
0.00
0.00
9.00
0.00
0.00
0.00
10.00
0.00
0.00
0.00
11.00
0.22
0.00
0.22
12.00
43.33
0.00
43.33
13.00
11.98
0.00
11.98
14.00
6.53
0.00
6.53
15.00
4.95
0.00
4.95
16.00
3.97
0.00
3.97
17.00
3.39
0.00
3.39
18.00
3.04
0.00
3.04
19.00
2.66
0.00
2.66
20.00
2.28
0.00
2.28
21.00
2.10
0.00
2.10
22.00
2.03
0.00
2.03
23.00
1.96
0.00
1.96
24.00
1.89
0.00
1.89
25.00
0.01
0.00
0.01
26.00
0.00
0.00
0.00
27.00
0.00
0.00
0.00
28.00
0.00
0.00
0.00
29.00
0.00
0.00
0.00
30.00
0.00
0.00
0.00
31.00
0.00
0.00
0.00
32.00
0.00
0.00
0.00
33.00
0.00
0.00
0.00
34.00
0.00
0.00
0.00
35.00
0.00
0.00
0.00
36.00
0.00
0.00
0.00
37.00
0.00
0.00
0.00
38.00
0.00
0.00
0.00
39.00
0.00
0.00
0.00
40.00
0.00
0.00
0.00
41.00
0.00
0.00
0.00
42.00
0.00
0.00
0.00
43.00
0.00
0.00
0.00
44.00
0.00
0.00
0.00
45.00
0.00
0.00
0.00
46.00
0.00
0.00
0.00
47.00
0.00
0.00
0.00
48.00
0.00
0.00
0.00
49.00
0.00
0.00
0.00
50.00
0.00
0.00
0.00
51.00
0.00
0.00
0.00
52.00
0.00
0.00
0.00
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.00
0.00
0.00
54.00
0.00
0.00
0.00
55.00
0.00
0.00
0.00
56.00
0.00
0.00
0.00
57.00
0.00
0.00
0.00
58.00
0.00
0.00
0.00
59.00
0.00
0.00
0.00
60.00
0.00
0.00
0.00
61.00
0.00
0.00
0.00
62.00
0.00
0.00
0.00
63.00
0.00
0.00
0.00
64.00
0.00
0.00
0.00
65.00
0.00
0.00
0.00
66.00
0.00
0.00
0.00
67.00
0.00
0.00
0.00
68.00
0.00
0.00
0.00
69.00
0.00
0.00
0.00
70.00
0.00
0.00
0.00
71.00
0.00
0.00
0.00
72.00
0.00
0.00
0.00

Weddington Acres HydroCAD Revised Layout Type 1124-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 225
Summary for Link P0I#1: Post -Development P0I#1
Inflow Area = 42.987 ac, 10.69% Impervious, Inflow Depth > 2.78" for 50 Year event
Inflow = 75.24 cfs @ 12.20 hrs, Volume= 9.960 of
Primary = 75.24 cfs @ 12.20 hrs, Volume= 9.960 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Link P0I#1: Post -Development P0I#1
Hydrograph
I A I I LI L �� II —i I-111 �1 1 L p Inflow
75.24 cfs F I T-1 F1 I7 � 1 1 % J� 1 I, IC ❑Primary
1ff7?1t1111 v�VV �1 CCC1-1 I� LLL 1 �Q t
•,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,�,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
,,,,,,,,,,,,,
------------------------------------------------

Weddington Acres HydroCAD Revised Layout Type // 24-hr 50 Year Rainfall=6.89"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 226
Hydrograph for Link P0I#1: Post -Development P0I#1
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.00
0.00
0.00
2.00
0.00
0.00
0.00
3.00
0.00
0.00
0.00
4.00
0.00
0.00
0.00
5.00
0.00
0.00
0.00
6.00
0.00
0.00
0.00
7.00
0.00
0.00
0.00
8.00
0.00
0.00
0.00
9.00
0.00
0.00
0.00
10.00
0.03
0.00
0.03
11.00
0.39
0.00
0.39
12.00
37.41
0.00
37.41
13.00
24.27
0.00
24.27
14.00
10.63
0.00
10.63
15.00
7.29
0.00
7.29
16.00
5.73
0.00
5.73
17.00
4.76
0.00
4.76
18.00
4.21
0.00
4.21
19.00
3.70
0.00
3.70
20.00
3.19
0.00
3.19
21.00
2.87
0.00
2.87
22.00
2.73
0.00
2.73
23.00
2.62
0.00
2.62
24.00
2.52
0.00
2.52
25.00
0.62
0.00
0.62
26.00
0.29
0.00
0.29
27.00
0.19
0.00
0.19
28.00
0.16
0.00
0.16
29.00
0.16
0.00
0.16
30.00
0.15
0.00
0.15
31.00
0.15
0.00
0.15
32.00
0.15
0.00
0.15
33.00
0.15
0.00
0.15
34.00
0.15
0.00
0.15
35.00
0.15
0.00
0.15
36.00
0.15
0.00
0.15
37.00
0.15
0.00
0.15
38.00
0.14
0.00
0.14
39.00
0.14
0.00
0.14
40.00
0.14
0.00
0.14
41.00
0.14
0.00
0.14
42.00
0.14
0.00
0.14
43.00
0.14
0.00
0.14
44.00
0.14
0.00
0.14
45.00
0.13
0.00
0.13
46.00
0.13
0.00
0.13
47.00
0.13
0.00
0.13
48.00
0.13
0.00
0.13
49.00
0.13
0.00
0.13
50.00
0.13
0.00
0.13
51.00
0.13
0.00
0.13
52.00
0.12
0.00
0.12
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.12
0.00
0.12
54.00
0.12
0.00
0.12
55.00
0.12
0.00
0.12
56.00
0.12
0.00
0.12
57.00
0.12
0.00
0.12
58.00
0.12
0.00
0.12
59.00
0.11
0.00
0.11
60.00
0.11
0.00
0.11
61.00
0.11
0.00
0.11
62.00
0.11
0.00
0.11
63.00
0.11
0.00
0.11
64.00
0.11
0.00
0.11
65.00
0.10
0.00
0.10
66.00
0.10
0.00
0.10
67.00
0.10
0.00
0.10
68.00
0.10
0.00
0.10
69.00
0.10
0.00
0.10
70.00
0.09
0.00
0.09
71.00
0.09
0.00
0.09
72.00
0.09
0.00
0.09

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 227
Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment IS: Pre #1 Runoff Area=9.570 ac 0.00% Impervious Runoff Depth=2.90"
Tc=18.5 min CN=58 Runoff=31.22 cfs 2.310 of
Subcatchment2S: Pre #2 Runoff Area=10.386 ac 0.00% Impervious Runoff Depth=3.11"
Tc=23.8 min CN=60 Runoff=31.49 cfs 2.692 of
Subcatchment3S: Pre #3 Runoff Area=16.909 ac 0.00% Impervious Runoff Depth=2.58"
Tc=23.6 min CN=55 Runoff=41.49 cfs 3.637 of
Subcatchment5S: By-Pass#2 Runoff Area=14.199 ac 0.00% Impervious Runoff Depth=3.11"
Tc=23.1 min CN=60 Runoff=43.97 cfs 3.680 of
Subcatchment6S: By-Pass#1 Runoff Area=7.040 ac 0.00% Impervious Runoff Depth=3.00"
Tc=18.5 min CN=59 Runoff=23.92 cfs 1.762 of
SubcatchmentP01#2: Post -Development Runoff Area=1.540 ac 0.00% Impervious Runoff Depth=3.65"
Tc=17.6 min CN=65 Runoff=6.66 cfs 0.469 of
SubcatchmentP01#3: Post -Development Runoff Area=4.635 ac 6.84% Impervious Runoff Depth=3.87"
Tc=14.9 min CN=67 Runoff=23.13 cfs 1.496 of
SubcatchmentP01#4: Post -Development Runoff Area=1.796 ac 18.71% Impervious Runoff Depth=3.98"
Tc=25.5 min CN=68 Runoff=6.84 cfs 0.596 of
SubcatchmentPOND#1: Runoff Area=16.500 ac 18.59% Impervious Runoff Depth=3.76"
Tc=25.7 min CN=66 Runoff=58.96 cfs 5.174 of
SubcatchmentPOND#2: Post -Development Runoff Area=5.248 ac 29.12% Impervious Runoff Depth=4.32"
Tc=11.0 min CN=71 Runoff=33.10 cfs 1.889 of
Subcatchment PRE-POI#2: Pre -Development Runoff Area=4.456 ac 0.00% Impervious Runoff Depth=3.65"
Tc=18.4 min CN=65 Runoff=18.81 cfs 1.357 of
Subcatchment PRE-POI#3: Pre -Development Runoff Area=7.087 ac 1.93% Impervious Runoff Depth=3.76"
Tc=20.0 min CN=66 Runoff=29.38 cfs 2.222 of
Subcatchment PRE-POI#4: Pre -Development Runoff Area=2.545 ac 5.30% Impervious Runoff Depth=3.87"
Tc=15.9 min CN=67 Runoff=12.29 cfs 0.822 of
Pond DIET POND-1: Detention Pond #1 Peak EIev=714.20' Storage=69,225 cf Inflow=58.96 cfs 5.174 of
Primary=36.11 cfs 4.862 of Secondary=0.00 cfs 0.000 of Outflow=36.11 cfs 4.862 of
Pond DIET POND-2: Detention Pond #2 Peak EIev=700.87' Storage=26,344 cf Inflow=33.10 cfs 1.889 of
Primary=19.36 cfs 1.870 of Secondary=0.00 cfs 0.000 of Outflow=19.36 cfs 1.870 of
Link 4L: Pre-DevelopmentP01 Inflow=102.39 cfs 8.639 of
Primary=102.39 cfs 8.639 of

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 228
Link POI#1: Post-DevelopmentPO1#1
Inflow=99.55 cfs 12.174 of
Primary=99.55 cfs 12.174 of
Total Runoff Area = 101.911 ac Runoff Volume = 28.106 of Average Runoff Depth = 3.31"
94.58% Pervious = 96.390 ac 5.42% Impervious = 5.521 ac

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 229
Summary for Subcatchment 1S: Pre #1
Runoff = 31.22 cfs @ 12.12 hrs, Volume= 2.310 af, Depth= 2.90"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 Year Rainfall=7.70"
Area (ac) CN Description
8.570 55 Woods, Good, HSG B
1.000 79 Woods/grass comb., Good, HSG D
9.570 58 Weighted Average
9.570 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.5 Direct Entry,
Subcatchment 1S: Pre #1
Hydrograph
■ Runoff
32
31.22
I
cfs
I �
I � I � I
� I
�I
�I
�I N I� I
30
28
I� I
—L
II
I I I L I
LI
i-I
111�1
L11bb `T'r e6 artRlain�II6�.FT�'�
26
24
I�
7
17
I T I T 17
171
r1
lft bft-Atda�-9.5i7Q did
22
11
I t I t I
t I
t1
1 l
ypyp0# Y-0gyp f3
w 20
18
14
I+I +1
4-I
�I
H
�I�qnjrjl�
0 16LL
14
_
12
10
I�11111LI-LI
L I
LI LI 1-1 IT I-TIIII
6
17
- -
-I
-I
-I
-I n I- I- I- I- -
4
/
I�
1 t I -f- I
-�- I
tI
-�--I
�--1 �-j 1-4 11 -� I t
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 230
Hydrograph for Subcatchment 1S: Pre #1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.08
0.00
0.00
2.00
0.17
0.00
0.00
3.00
0.27
0.00
0.00
4.00
0.37
0.00
0.00
5.00
0.49
0.00
0.00
6.00
0.62
0.00
0.00
7.00
0.76
0.00
0.00
8.00
0.92
0.00
0.00
9.00
1.13
0.00
0.00
10.00
1.39
0.00
0.00
11.00
1.81
0.02
0.27
12.00
5.11
1.23
20.67
13.00
5.94
1.72
3.50
14.00
6.31
1.96
2.02
15.00
6.57
2.12
1.55
16.00
6.78
2.26
1.24
17.00
6.94
2.37
1.06
18.00
7.09
2.47
0.95
19.00
7.22
2.56
0.83
20.00
7.33
2.64
0.71
21.00
7.43
2.70
0.66
22.00
7.52
2.77
0.63
23.00
7.61
2.84
0.61
24.00
7.70
2.90
0.59
25.00
7.70
2.90
0.00
26.00
7.70
2.90
0.00
27.00
7.70
2.90
0.00
28.00
7.70
2.90
0.00
29.00
7.70
2.90
0.00
30.00
7.70
2.90
0.00
31.00
7.70
2.90
0.00
32.00
7.70
2.90
0.00
33.00
7.70
2.90
0.00
34.00
7.70
2.90
0.00
35.00
7.70
2.90
0.00
36.00
7.70
2.90
0.00
37.00
7.70
2.90
0.00
38.00
7.70
2.90
0.00
39.00
7.70
2.90
0.00
40.00
7.70
2.90
0.00
41.00
7.70
2.90
0.00
42.00
7.70
2.90
0.00
43.00
7.70
2.90
0.00
44.00
7.70
2.90
0.00
45.00
7.70
2.90
0.00
46.00
7.70
2.90
0.00
47.00
7.70
2.90
0.00
48.00
7.70
2.90
0.00
49.00
7.70
2.90
0.00
50.00
7.70
2.90
0.00
51.00
7.70
2.90
0.00
52.00
7.70
2.90
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.70
2.90
0.00
54.00
7.70
2.90
0.00
55.00
7.70
2.90
0.00
56.00
7.70
2.90
0.00
57.00
7.70
2.90
0.00
58.00
7.70
2.90
0.00
59.00
7.70
2.90
0.00
60.00
7.70
2.90
0.00
61.00
7.70
2.90
0.00
62.00
7.70
2.90
0.00
63.00
7.70
2.90
0.00
64.00
7.70
2.90
0.00
65.00
7.70
2.90
0.00
66.00
7.70
2.90
0.00
67.00
7.70
2.90
0.00
68.00
7.70
2.90
0.00
69.00
7.70
2.90
0.00
70.00
7.70
2.90
0.00
71.00
7.70
2.90
0.00
72.00
7.70
2.90
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 231
Summary for Subcatchment 2S: Pre #2
Runoff = 31.49 cfs @ 12.18 hrs, Volume= 2.692 af, Depth= 3.11"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 Year Rainfall=7.70"
Area (ac) CN Description
8.386 55 Woods, Good, HSG B
2.000 79 Woods/grass comb., Good, HSG D
10.386 60 Weighted Average
10.386 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
23.8 Direct Entry,
Subcatchment 2S: Pre #2
Hydrograph
■ Runoff
J"
32
31.49
cfs
i 1 i 1�
I
D
E1 LI a 1-1 I
�
2$
�I��
26
rt
I rt
I rt I T- I
fi I
fi I
tl RLinbff ArOA=T0.386 -*d
24
22
-+
I
I + I + I
I
-�-1
i--F 4949q# Y-0Il4jp�-=12f�9"f
18
1
�I
H �n
3
16nAn
" 1412
10IIIIIIIIIIII8
L1111
6
IT T1rI
r1
r1 rI r-i 1i 1- rt Irt1T
4,
��-I��
�� I� I-t I -+It
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 232
Hydrograph for Subcatchment 2S: Pre #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.08
0.00
0.00
2.00
0.17
0.00
0.00
3.00
0.27
0.00
0.00
4.00
0.37
0.00
0.00
5.00
0.49
0.00
0.00
6.00
0.62
0.00
0.00
7.00
0.76
0.00
0.00
8.00
0.92
0.00
0.00
9.00
1.13
0.00
0.00
10.00
1.39
0.00
0.00
11.00
1.81
0.03
0.40
12.00
5.11
1.36
16.46
13.00
5.94
1.89
4.58
14.00
6.31
2.13
2.39
15.00
6.57
2.31
1.79
16.00
6.78
2.45
1.43
17.00
6.94
2.56
1.21
18.00
7.09
2.67
1.08
19.00
7.22
2.76
0.95
20.00
7.33
2.84
0.81
21.00
7.43
2.91
0.74
22.00
7.52
2.98
0.72
23.00
7.61
3.05
0.69
24.00
7.70
3.11
0.66
25.00
7.70
3.11
0.00
26.00
7.70
3.11
0.00
27.00
7.70
3.11
0.00
28.00
7.70
3.11
0.00
29.00
7.70
3.11
0.00
30.00
7.70
3.11
0.00
31.00
7.70
3.11
0.00
32.00
7.70
3.11
0.00
33.00
7.70
3.11
0.00
34.00
7.70
3.11
0.00
35.00
7.70
3.11
0.00
36.00
7.70
3.11
0.00
37.00
7.70
3.11
0.00
38.00
7.70
3.11
0.00
39.00
7.70
3.11
0.00
40.00
7.70
3.11
0.00
41.00
7.70
3.11
0.00
42.00
7.70
3.11
0.00
43.00
7.70
3.11
0.00
44.00
7.70
3.11
0.00
45.00
7.70
3.11
0.00
46.00
7.70
3.11
0.00
47.00
7.70
3.11
0.00
48.00
7.70
3.11
0.00
49.00
7.70
3.11
0.00
50.00
7.70
3.11
0.00
51.00
7.70
3.11
0.00
52.00
7.70
3.11
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.70
3.11
0.00
54.00
7.70
3.11
0.00
55.00
7.70
3.11
0.00
56.00
7.70
3.11
0.00
57.00
7.70
3.11
0.00
58.00
7.70
3.11
0.00
59.00
7.70
3.11
0.00
60.00
7.70
3.11
0.00
61.00
7.70
3.11
0.00
62.00
7.70
3.11
0.00
63.00
7.70
3.11
0.00
64.00
7.70
3.11
0.00
65.00
7.70
3.11
0.00
66.00
7.70
3.11
0.00
67.00
7.70
3.11
0.00
68.00
7.70
3.11
0.00
69.00
7.70
3.11
0.00
70.00
7.70
3.11
0.00
71.00
7.70
3.11
0.00
72.00
7.70
3.11
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 233
Summary for Subcatchment 3S: Pre #3
Runoff = 41.49 cfs @ 12.18 hrs, Volume= 3.637 af, Depth= 2.58"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 Year Rainfall=7.70"
Area (ac) CN Description
11.470 55 Woods, Good, HSG B
5.439 56 Brush, Fair, HSG B
16.909 55 Weighted Average
16.909 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
23.6 Direct Entry,
Subcatchment 3S: Pre #3
Hydrograph
■ Runoff
44
42
40
1 41.49 cfs
I H
H H I
H 1
H
H H
H
1
H H
H
H1 a�Rlainll�'�
36
34
32
H _
1111111
L 1
HI
HI RUnff Ardd=116.909 lick
28
IH 1
-+
1 4
1 H 1+ 1
4-1
HI
�tm°I���fl
24
° 22
HI
IIItItItIfitHH�n1r1�ie
LL 18
IH I
14
1 H I H I�
1
HI
= 3 n n
HI HI H IH 1-4 I H &4L-"
16
14
1-4
HIHIHIH
HI
HI HI H IH IH IH IHIHI
12
18
�
H 11
L I
H
H H H H H H 1111
6
4,
-
1 I I
I I I
I I
HI
11 1 1 H 1 1 1 1 IH 14 1H
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 234
Hydrograph for Subcatchment 3S: Pre #3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.08
0.00
0.00
2.00
0.17
0.00
0.00
3.00
0.27
0.00
0.00
4.00
0.37
0.00
0.00
5.00
0.49
0.00
0.00
6.00
0.62
0.00
0.00
7.00
0.76
0.00
0.00
8.00
0.92
0.00
0.00
9.00
1.13
0.00
0.00
10.00
1.39
0.00
0.00
11.00
1.81
0.00
0.05
12.00
5.11
1.03
20.25
13.00
5.94
1.49
6.44
14.00
6.31
1.70
3.43
15.00
6.57
1.86
2.59
16.00
6.78
1.98
2.08
17.00
6.94
2.09
1.77
18.00
7.09
2.18
1.58
19.00
7.22
2.27
1.39
20.00
7.33
2.34
1.19
21.00
7.43
2.40
1.09
22.00
7.52
2.46
1.06
23.00
7.61
2.52
1.02
24.00
7.70
2.58
0.98
25.00
7.70
2.58
0.01
26.00
7.70
2.58
0.00
27.00
7.70
2.58
0.00
28.00
7.70
2.58
0.00
29.00
7.70
2.58
0.00
30.00
7.70
2.58
0.00
31.00
7.70
2.58
0.00
32.00
7.70
2.58
0.00
33.00
7.70
2.58
0.00
34.00
7.70
2.58
0.00
35.00
7.70
2.58
0.00
36.00
7.70
2.58
0.00
37.00
7.70
2.58
0.00
38.00
7.70
2.58
0.00
39.00
7.70
2.58
0.00
40.00
7.70
2.58
0.00
41.00
7.70
2.58
0.00
42.00
7.70
2.58
0.00
43.00
7.70
2.58
0.00
44.00
7.70
2.58
0.00
45.00
7.70
2.58
0.00
46.00
7.70
2.58
0.00
47.00
7.70
2.58
0.00
48.00
7.70
2.58
0.00
49.00
7.70
2.58
0.00
50.00
7.70
2.58
0.00
51.00
7.70
2.58
0.00
52.00
7.70
2.58
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.70
2.58
0.00
54.00
7.70
2.58
0.00
55.00
7.70
2.58
0.00
56.00
7.70
2.58
0.00
57.00
7.70
2.58
0.00
58.00
7.70
2.58
0.00
59.00
7.70
2.58
0.00
60.00
7.70
2.58
0.00
61.00
7.70
2.58
0.00
62.00
7.70
2.58
0.00
63.00
7.70
2.58
0.00
64.00
7.70
2.58
0.00
65.00
7.70
2.58
0.00
66.00
7.70
2.58
0.00
67.00
7.70
2.58
0.00
68.00
7.70
2.58
0.00
69.00
7.70
2.58
0.00
70.00
7.70
2.58
0.00
71.00
7.70
2.58
0.00
72.00
7.70
2.58
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 235
Summary for Subcatchment 5S: By -Pass #2
Runoff = 43.97 cfs @ 12.17 hrs, Volume= 3.680 af, Depth= 3.11"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 Year Rainfall=7.70"
Area (ac) CN Description
11.999 58 Woods/grass comb., Good, HSG B
2.200 73 Brush, Good, HSG D
14.199 60 Weighted Average
14.199 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
23.1 Direct Entry,
Subcatchment 5S: By -Pass #2
Hydrograph
■ Runoff
46 44
43.97 cfs
I T
I I I T_ 11:
I:E
IM
F:I Q El
40
1Ql_'Rn'.l�1y1�1�`�1
38
34
I7t I
__T17
I T I T I
T I
-71
T71 FWinal fff Ar =(��#�
T99 4Q d
30
_t
I_t
I+ I+ I
J_ I
-H
1� O# 04�i3Ti-0
��
:T26
I�I�IT_I�I
�I
le
�I �I�n
324
o 222
—
—
_
18—LL
I
- - - - - -
w
v
14
4I4I
I I4_I�_I�_I�_I
I4I4I4I4
12
10
—
111
t I t I
t I
t I
H t__I N I-1H II It
4
I�
1�I�I4-I
�I
�� L—I N I I 1� I4 I41--�I
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 236
Hydrograph for Subcatchment 5S: By -Pass #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.08
0.00
0.00
2.00
0.17
0.00
0.00
3.00
0.27
0.00
0.00
4.00
0.37
0.00
0.00
5.00
0.49
0.00
0.00
6.00
0.62
0.00
0.00
7.00
0.76
0.00
0.00
8.00
0.92
0.00
0.00
9.00
1.13
0.00
0.00
10.00
1.39
0.00
0.00
11.00
1.81
0.03
0.55
12.00
5.11
1.36
23.72
13.00
5.94
1.89
6.14
14.00
6.31
2.13
3.25
15.00
6.57
2.31
2.44
16.00
6.78
2.45
1.95
17.00
6.94
2.56
1.66
18.00
7.09
2.67
1.48
19.00
7.22
2.76
1.29
20.00
7.33
2.84
1.10
21.00
7.43
2.91
1.01
22.00
7.52
2.98
0.98
23.00
7.61
3.05
0.94
24.00
7.70
3.11
0.91
25.00
7.70
3.11
0.01
26.00
7.70
3.11
0.00
27.00
7.70
3.11
0.00
28.00
7.70
3.11
0.00
29.00
7.70
3.11
0.00
30.00
7.70
3.11
0.00
31.00
7.70
3.11
0.00
32.00
7.70
3.11
0.00
33.00
7.70
3.11
0.00
34.00
7.70
3.11
0.00
35.00
7.70
3.11
0.00
36.00
7.70
3.11
0.00
37.00
7.70
3.11
0.00
38.00
7.70
3.11
0.00
39.00
7.70
3.11
0.00
40.00
7.70
3.11
0.00
41.00
7.70
3.11
0.00
42.00
7.70
3.11
0.00
43.00
7.70
3.11
0.00
44.00
7.70
3.11
0.00
45.00
7.70
3.11
0.00
46.00
7.70
3.11
0.00
47.00
7.70
3.11
0.00
48.00
7.70
3.11
0.00
49.00
7.70
3.11
0.00
50.00
7.70
3.11
0.00
51.00
7.70
3.11
0.00
52.00
7.70
3.11
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.70
3.11
0.00
54.00
7.70
3.11
0.00
55.00
7.70
3.11
0.00
56.00
7.70
3.11
0.00
57.00
7.70
3.11
0.00
58.00
7.70
3.11
0.00
59.00
7.70
3.11
0.00
60.00
7.70
3.11
0.00
61.00
7.70
3.11
0.00
62.00
7.70
3.11
0.00
63.00
7.70
3.11
0.00
64.00
7.70
3.11
0.00
65.00
7.70
3.11
0.00
66.00
7.70
3.11
0.00
67.00
7.70
3.11
0.00
68.00
7.70
3.11
0.00
69.00
7.70
3.11
0.00
70.00
7.70
3.11
0.00
71.00
7.70
3.11
0.00
72.00
7.70
3.11
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 237
Summary for Subcatchment 6S: By -Pass #1
Runoff = 23.92 cfs @ 12.12 hrs, Volume= 1.762 af, Depth= 3.00"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 Year Rainfall=7.70"
Area (ac) CN Description
6.540 58 Woods/grass comb., Good, HSG B
0.500 73 Brush, Good, HSG D
7.040 59 Weighted Average
7.040 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.5 Direct Entry,
Subcatchment 6S: By -Pass #1
Hydrograph
■ Runoff
`v
24
23.92
cfs
1 T
1 T T I
T 1
TI
TI
I�
TI T IT J p- 111�� �
22
_ _L I
T I
TI
L11 bb ` ai 11ainiWI
20
1--4-t
I
I + + I
T I
-HH
ffthbif -A4 *a�=7.040 Ad
18
16
l
1 17
1 1 1 1 1
Ti
1 1
1�yggff
4 �-71 f7l Vf
3 14-4
14
1 14-1
TI
�I
�-I�qnjrj�ipe_ � '
0 12
U.
rt
rt T
T
T
�I
m�n
�I II I� Irt rt$ NL —
8
illllllllllllllllllllllllllll
6
141+1+1
T
T
H
H I I 4 141+I
4
2
' T
TI
T1
�1
IT IT T
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 238
Hydrograph for Subcatchment 6S: By -Pass #1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.08
0.00
0.00
2.00
0.17
0.00
0.00
3.00
0.27
0.00
0.00
4.00
0.37
0.00
0.00
5.00
0.49
0.00
0.00
6.00
0.62
0.00
0.00
7.00
0.76
0.00
0.00
8.00
0.92
0.00
0.00
9.00
1.13
0.00
0.00
10.00
1.39
0.00
0.00
11.00
1.81
0.02
0.25
12.00
5.11
1.29
15.99
13.00
5.94
1.80
2.64
14.00
6.31
2.04
1.52
15.00
6.57
2.21
1.17
16.00
6.78
2.35
0.93
17.00
6.94
2.47
0.80
18.00
7.09
2.57
0.71
19.00
7.22
2.66
0.62
20.00
7.33
2.74
0.53
21.00
7.43
2.81
0.49
22.00
7.52
2.88
0.48
23.00
7.61
2.94
0.46
24.00
7.70
3.00
0.44
25.00
7.70
3.00
0.00
26.00
7.70
3.00
0.00
27.00
7.70
3.00
0.00
28.00
7.70
3.00
0.00
29.00
7.70
3.00
0.00
30.00
7.70
3.00
0.00
31.00
7.70
3.00
0.00
32.00
7.70
3.00
0.00
33.00
7.70
3.00
0.00
34.00
7.70
3.00
0.00
35.00
7.70
3.00
0.00
36.00
7.70
3.00
0.00
37.00
7.70
3.00
0.00
38.00
7.70
3.00
0.00
39.00
7.70
3.00
0.00
40.00
7.70
3.00
0.00
41.00
7.70
3.00
0.00
42.00
7.70
3.00
0.00
43.00
7.70
3.00
0.00
44.00
7.70
3.00
0.00
45.00
7.70
3.00
0.00
46.00
7.70
3.00
0.00
47.00
7.70
3.00
0.00
48.00
7.70
3.00
0.00
49.00
7.70
3.00
0.00
50.00
7.70
3.00
0.00
51.00
7.70
3.00
0.00
52.00
7.70
3.00
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.70
3.00
0.00
54.00
7.70
3.00
0.00
55.00
7.70
3.00
0.00
56.00
7.70
3.00
0.00
57.00
7.70
3.00
0.00
58.00
7.70
3.00
0.00
59.00
7.70
3.00
0.00
60.00
7.70
3.00
0.00
61.00
7.70
3.00
0.00
62.00
7.70
3.00
0.00
63.00
7.70
3.00
0.00
64.00
7.70
3.00
0.00
65.00
7.70
3.00
0.00
66.00
7.70
3.00
0.00
67.00
7.70
3.00
0.00
68.00
7.70
3.00
0.00
69.00
7.70
3.00
0.00
70.00
7.70
3.00
0.00
71.00
7.70
3.00
0.00
72.00
7.70
3.00
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 239
Summary for Subcatchment P0I#2: Post -Development P0I#2
Runoff = 6.66 cfs @ 12.10 hrs, Volume= 0.469 af, Depth= 3.65"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 Year Rainfall=7.70"
Area (ac) CN Description
1.540 65 Woods/grass comb., Fair, HSG B
1.540 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
17.6 Direct Entry,
7
6
5
4
3
0
LL
3
2
I
1
Subcatchment P0I#2: Post -Development P0I#2
Hydrograph
i i i i i � i i � i i i i � � � i i i i J ■Runoff
6.66 cfs
IMMH 1 II I I166*far IRIaintailOJ&
fi �I H IRfuhbfff-Alll-ela .W ;E�d
L I L I L I L I LI LI 1—�OI�Y°�14q= Of4�P�
IIIIHIII II I I I I" TulnrIzT
r 'I���. M
111I 111II IIIIIIIII 6�L6�
1tritlfitfit rI t_� t 1111rtlItI_r
-ICI LI LI �I �_j It It I_� I_�I�_I LI
III IIII'llllllllllllll
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 240
Hydrograph for Subcatchment POI#2: Post -Development POI#2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.08
0.00
0.00
2.00
0.17
0.00
0.00
3.00
0.27
0.00
0.00
4.00
0.37
0.00
0.00
5.00
0.49
0.00
0.00
6.00
0.62
0.00
0.00
7.00
0.76
0.00
0.00
8.00
0.92
0.00
0.00
9.00
1.13
0.00
0.00
10.00
1.39
0.02
0.04
11.00
1.81
0.09
0.14
12.00
5.11
1.72
4.85
13.00
5.94
2.31
0.65
14.00
6.31
2.58
0.38
15.00
6.57
2.78
0.29
16.00
6.78
2.93
0.23
17.00
6.94
3.06
0.19
18.00
7.09
3.17
0.17
19.00
7.22
3.27
0.15
20.00
7.33
3.36
0.13
21.00
7.43
3.44
0.12
22.00
7.52
3.51
0.11
23.00
7.61
3.58
0.11
24.00
7.70
3.65
0.11
25.00
7.70
3.65
0.00
26.00
7.70
3.65
0.00
27.00
7.70
3.65
0.00
28.00
7.70
3.65
0.00
29.00
7.70
3.65
0.00
30.00
7.70
3.65
0.00
31.00
7.70
3.65
0.00
32.00
7.70
3.65
0.00
33.00
7.70
3.65
0.00
34.00
7.70
3.65
0.00
35.00
7.70
3.65
0.00
36.00
7.70
3.65
0.00
37.00
7.70
3.65
0.00
38.00
7.70
3.65
0.00
39.00
7.70
3.65
0.00
40.00
7.70
3.65
0.00
41.00
7.70
3.65
0.00
42.00
7.70
3.65
0.00
43.00
7.70
3.65
0.00
44.00
7.70
3.65
0.00
45.00
7.70
3.65
0.00
46.00
7.70
3.65
0.00
47.00
7.70
3.65
0.00
48.00
7.70
3.65
0.00
49.00
7.70
3.65
0.00
50.00
7.70
3.65
0.00
51.00
7.70
3.65
0.00
52.00
7.70
3.65
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.70
3.65
0.00
54.00
7.70
3.65
0.00
55.00
7.70
3.65
0.00
56.00
7.70
3.65
0.00
57.00
7.70
3.65
0.00
58.00
7.70
3.65
0.00
59.00
7.70
3.65
0.00
60.00
7.70
3.65
0.00
61.00
7.70
3.65
0.00
62.00
7.70
3.65
0.00
63.00
7.70
3.65
0.00
64.00
7.70
3.65
0.00
65.00
7.70
3.65
0.00
66.00
7.70
3.65
0.00
67.00
7.70
3.65
0.00
68.00
7.70
3.65
0.00
69.00
7.70
3.65
0.00
70.00
7.70
3.65
0.00
71.00
7.70
3.65
0.00
72.00
7.70
3.65
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 241
Summary for Subcatchment P0I#3: Post -Development P0I#3
Runoff = 23.13 cfs @ 12.07 hrs, Volume= 1.496 af, Depth= 3.87"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 Year Rainfall=7.70"
Area (ac) CN Description
4.318 65 Woods/grass comb., Fair, HSG B
0.317 98 Paved parking, HSG B
4.635 67 Weighted Average
4.318 93.16% Pervious Area
0.317 6.84% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
14.9 Direct Entry,
Subcatchment P0I#3: Post -Development P0I#3
Hydrograph
IH
I414I4
H 1-4IH14141
23
23.13
cfs
I
HI
I
HI HI H H I:
22
21
—
—�
H
H H
H
-
�
H1 b alr la n III I'�
2
19
18
—
H
-_;1 T 1
T I
HI
.Fl
HI RuCi D fM a�4.05i *d
17
15
N
v 14
13
IH
1-
+
IH
I H I H I
HI
HI
HI HI "Hn1°rI P79I
0 12
LL10
H
4141HI-kIH
H
C� ��
H H HI H H 4&4L
9
H
-
I_
—
�1
II
IHI II
_LI
H
H H H H H H I111I
6
5
H
—
I
—
I
I H I H I
H
HI
HI HI H IH H IH I I H
4
2
H
1-
14- H1
H
H H II H H IH 14 IHI
1
0
0
2 4 6 8
10 12 14
16
18 20
22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 7:
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 242
Hydrograph for Subcatchment POI#3: Post -Development POI#3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.08
0.00
0.00
2.00
0.17
0.00
0.00
3.00
0.27
0.00
0.00
4.00
0.37
0.00
0.00
5.00
0.49
0.00
0.00
6.00
0.62
0.00
0.00
7.00
0.76
0.00
0.00
8.00
0.92
0.00
0.00
9.00
1.13
0.00
0.04
10.00
1.39
0.03
0.16
11.00
1.81
0.12
0.53
12.00
5.11
1.88
19.21
13.00
5.94
2.49
1.97
14.00
6.31
2.77
1.15
15.00
6.57
2.97
0.89
16.00
6.78
3.13
0.70
17.00
6.94
3.26
0.60
18.00
7.09
3.38
0.53
19.00
7.22
3.48
0.47
20.00
7.33
3.57
0.39
21.00
7.43
3.65
0.37
22.00
7.52
3.73
0.36
23.00
7.61
3.80
0.34
24.00
7.70
3.87
0.33
25.00
7.70
3.87
0.00
26.00
7.70
3.87
0.00
27.00
7.70
3.87
0.00
28.00
7.70
3.87
0.00
29.00
7.70
3.87
0.00
30.00
7.70
3.87
0.00
31.00
7.70
3.87
0.00
32.00
7.70
3.87
0.00
33.00
7.70
3.87
0.00
34.00
7.70
3.87
0.00
35.00
7.70
3.87
0.00
36.00
7.70
3.87
0.00
37.00
7.70
3.87
0.00
38.00
7.70
3.87
0.00
39.00
7.70
3.87
0.00
40.00
7.70
3.87
0.00
41.00
7.70
3.87
0.00
42.00
7.70
3.87
0.00
43.00
7.70
3.87
0.00
44.00
7.70
3.87
0.00
45.00
7.70
3.87
0.00
46.00
7.70
3.87
0.00
47.00
7.70
3.87
0.00
48.00
7.70
3.87
0.00
49.00
7.70
3.87
0.00
50.00
7.70
3.87
0.00
51.00
7.70
3.87
0.00
52.00
7.70
3.87
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.70
3.87
0.00
54.00
7.70
3.87
0.00
55.00
7.70
3.87
0.00
56.00
7.70
3.87
0.00
57.00
7.70
3.87
0.00
58.00
7.70
3.87
0.00
59.00
7.70
3.87
0.00
60.00
7.70
3.87
0.00
61.00
7.70
3.87
0.00
62.00
7.70
3.87
0.00
63.00
7.70
3.87
0.00
64.00
7.70
3.87
0.00
65.00
7.70
3.87
0.00
66.00
7.70
3.87
0.00
67.00
7.70
3.87
0.00
68.00
7.70
3.87
0.00
69.00
7.70
3.87
0.00
70.00
7.70
3.87
0.00
71.00
7.70
3.87
0.00
72.00
7.70
3.87
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 243
Summary for Subcatchment P0I#4: Post -Development P0I#4
Runoff = 6.84 cfs @ 12.19 hrs, Volume= 0.596 af, Depth= 3.98"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 Year Rainfall=7.70"
Area (ac) CN Description
1.460 61 >75% Grass cover, Good, HSG B
0.336 98 Paved parking, HSG B
1.796 68 Weighted Average
1.460 81.29% Pervious Area
0.336 18.71 % Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
25.5 Direct Entry,
Subcatchment P0I#4: Post -Development P0I#4
Hydrograph
� 6.84 cfs
6 H rt l rt rt l fi l �I �100 Yea Rainfall .7 i
nun
H H H IRU"fff-Arjda01.796 Ad
5 IIII III IIII III �4go�ffl ollyTp70}596 a#
3 4 �I III IIII F unl°_I�e�
3 1 1 1 i� III IIII IIIIIIIIII I I I ��L�a�
2 H H HH HI H H IH H HHIH H
ICI II IIII. IIIIIIIIII IIIII II
1
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 3840 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 244
Hydrograph for Subcatchment POI#4: Post -Development POI#4
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.08
0.00
0.00
2.00
0.17
0.00
0.00
3.00
0.27
0.00
0.00
4.00
0.37
0.00
0.00
5.00
0.49
0.00
0.00
6.00
0.62
0.00
0.00
7.00
0.76
0.00
0.00
8.00
0.92
0.00
0.00
9.00
1.13
0.01
0.02
10.00
1.39
0.04
0.06
11.00
1.81
0.14
0.19
12.00
5.11
1.95
3.61
13.00
5.94
2.58
1.00
14.00
6.31
2.86
0.49
15.00
6.57
3.07
0.36
16.00
6.78
3.23
0.29
17.00
6.94
3.36
0.24
18.00
7.09
3.48
0.21
19.00
7.22
3.59
0.19
20.00
7.33
3.68
0.16
21.00
7.43
3.76
0.15
22.00
7.52
3.84
0.14
23.00
7.61
3.91
0.14
24.00
7.70
3.98
0.13
25.00
7.70
3.98
0.00
26.00
7.70
3.98
0.00
27.00
7.70
3.98
0.00
28.00
7.70
3.98
0.00
29.00
7.70
3.98
0.00
30.00
7.70
3.98
0.00
31.00
7.70
3.98
0.00
32.00
7.70
3.98
0.00
33.00
7.70
3.98
0.00
34.00
7.70
3.98
0.00
35.00
7.70
3.98
0.00
36.00
7.70
3.98
0.00
37.00
7.70
3.98
0.00
38.00
7.70
3.98
0.00
39.00
7.70
3.98
0.00
40.00
7.70
3.98
0.00
41.00
7.70
3.98
0.00
42.00
7.70
3.98
0.00
43.00
7.70
3.98
0.00
44.00
7.70
3.98
0.00
45.00
7.70
3.98
0.00
46.00
7.70
3.98
0.00
47.00
7.70
3.98
0.00
48.00
7.70
3.98
0.00
49.00
7.70
3.98
0.00
50.00
7.70
3.98
0.00
51.00
7.70
3.98
0.00
52.00
7.70
3.98
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.70
3.98
0.00
54.00
7.70
3.98
0.00
55.00
7.70
3.98
0.00
56.00
7.70
3.98
0.00
57.00
7.70
3.98
0.00
58.00
7.70
3.98
0.00
59.00
7.70
3.98
0.00
60.00
7.70
3.98
0.00
61.00
7.70
3.98
0.00
62.00
7.70
3.98
0.00
63.00
7.70
3.98
0.00
64.00
7.70
3.98
0.00
65.00
7.70
3.98
0.00
66.00
7.70
3.98
0.00
67.00
7.70
3.98
0.00
68.00
7.70
3.98
0.00
69.00
7.70
3.98
0.00
70.00
7.70
3.98
0.00
71.00
7.70
3.98
0.00
72.00
7.70
3.98
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 245
Summary for Subcatchment POND#1: Post -Development Pond#1
Runoff = 58.96 cfs @ 12.20 hrs, Volume= 5.174 af, Depth= 3.76"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 Year Rainfall=7.70"
Area (ac) CN Description
0.670
98
Paved parking, HSG B
12.602
58
Woods/grass comb., Good, HSG B
1.894
98
Roofs, HSG A
0.504
98
Water Surface, HSG B
0.830
61
>75% Grass cover, Good, HSG B
16.500
66
Weighted Average
13.432
81.41 % Pervious Area
3.068
18.59% Impervious Area
Tc
(min)
Length
(feet)
Slope
(ft/ft)
Velocity Capacity
(ft/sec) (cfs)
Description
25.7
Direct Entry,
Subcatchment POND#1: Post -Development Pond#1
Hydrograph
65
H H H
I_T
H 1--1 17 H
Runoff
60
1
58.96
cfs
55
50
IH
rt
1 rt
I rt I T- I
fi I
fi l
HI RUnbff IAr64=116- 5-00 Eck
45
40
I 1
1 1 1 1 I
I 1
1 1
I ��1 ��� �14���4 pf
35
1-4I
H
1 1
H I
HI
H Hn epth=3.7�'
7c=
0 30
25.
25
I
III
17
1 H I T I
T 1
HI
HI HI H IH 17 �
Nm=
20
15
HIHIHIHI
HI
HI H H H H H HI+
10
5
1
1
_F I T 1
-7 �
7-1
T—I 17 H _T I- H 1
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34,36 38 40 42 44 46 48 50 52 54 56 58 60 62 1. 64 66 68 70 72
Time (hours)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 246
Hydrograph for Subcatchment POND#1: Post -Development Pond#1
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.08
0.00
0.00
2.00
0.17
0.00
0.00
3.00
0.27
0.00
0.00
4.00
0.37
0.00
0.00
5.00
0.49
0.00
0.00
6.00
0.62
0.00
0.00
7.00
0.76
0.00
0.00
8.00
0.92
0.00
0.00
9.00
1.13
0.00
0.03
10.00
1.39
0.02
0.40
11.00
1.81
0.10
1.43
12.00
5.11
1.80
30.15
13.00
5.94
2.40
8.86
14.00
6.31
2.68
4.35
15.00
6.57
2.87
3.21
16.00
6.78
3.03
2.55
17.00
6.94
3.16
2.15
18.00
7.09
3.28
1.91
19.00
7.22
3.38
1.67
20.00
7.33
3.47
1.43
21.00
7.43
3.54
1.30
22.00
7.52
3.62
1.25
23.00
7.61
3.69
1.21
24.00
7.70
3.76
1.16
25.00
7.70
3.76
0.01
26.00
7.70
3.76
0.00
27.00
7.70
3.76
0.00
28.00
7.70
3.76
0.00
29.00
7.70
3.76
0.00
30.00
7.70
3.76
0.00
31.00
7.70
3.76
0.00
32.00
7.70
3.76
0.00
33.00
7.70
3.76
0.00
34.00
7.70
3.76
0.00
35.00
7.70
3.76
0.00
36.00
7.70
3.76
0.00
37.00
7.70
3.76
0.00
38.00
7.70
3.76
0.00
39.00
7.70
3.76
0.00
40.00
7.70
3.76
0.00
41.00
7.70
3.76
0.00
42.00
7.70
3.76
0.00
43.00
7.70
3.76
0.00
44.00
7.70
3.76
0.00
45.00
7.70
3.76
0.00
46.00
7.70
3.76
0.00
47.00
7.70
3.76
0.00
48.00
7.70
3.76
0.00
49.00
7.70
3.76
0.00
50.00
7.70
3.76
0.00
51.00
7.70
3.76
0.00
52.00
7.70
3.76
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.70
3.76
0.00
54.00
7.70
3.76
0.00
55.00
7.70
3.76
0.00
56.00
7.70
3.76
0.00
57.00
7.70
3.76
0.00
58.00
7.70
3.76
0.00
59.00
7.70
3.76
0.00
60.00
7.70
3.76
0.00
61.00
7.70
3.76
0.00
62.00
7.70
3.76
0.00
63.00
7.70
3.76
0.00
64.00
7.70
3.76
0.00
65.00
7.70
3.76
0.00
66.00
7.70
3.76
0.00
67.00
7.70
3.76
0.00
68.00
7.70
3.76
0.00
69.00
7.70
3.76
0.00
70.00
7.70
3.76
0.00
71.00
7.70
3.76
0.00
72.00
7.70
3.76
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 247
Summary for Subcatchment POND#2: Post -Development Pond #2
Runoff = 33.10 cfs @ 12.03 hrs, Volume= 1.889 af, Depth= 4.32"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 Year Rainfall=7.70"
Area (ac) CN Description
0.246
98
Paved parking, HSG B
3.500
58
Woods/grass comb., Good, HSG B
0.220
79
Woods/grass comb., Good, HSG D
1.010
98
Roofs, HSG A
0.272
98
Water Surface, HSG A
5.248
71
Weighted Average
3.720
70.88% Pervious Area
1.528
29.12% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
11.0 Direct Entry,
Subcatchment POND#2: Post -Development Pond #2
Hydrograph
I-+i-+I+I �I�—It-1 NI4I4I�
36
34
32
30
33.10
1_4 1
cfs
1--k1--k14-1�
4 1414-11 4-
28
26
I�
I�ICI�IL
24
22
U
—1I_LI_LI_LIL
N
Vs
3 18
_T1TITITIT
_o
LL14
T I T I T I T
12
10
I�
�Irtlrtl�lfi
L-I LI Rulhbff_Ai a��5.248 Ad
TI TI I �nl,,7l 'I'I
c= 1. min
7IT-IT-17It17I7 1jj1
fil tI t-1 r-1 I-1 Irt I-r Irt I T I
I� It tI tI tI H tI N 1-1 H II It
,I I'll 'll�'llll'!I HI!'ll!'I
0 2 4 6 8 10 12 14 16 18 20 22,24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 248
Hydrograph for Subcatchment POND#2: Post -Development Pond #2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.08
0.00
0.00
2.00
0.17
0.00
0.00
3.00
0.27
0.00
0.00
4.00
0.37
0.00
0.00
5.00
0.49
0.00
0.00
6.00
0.62
0.00
0.00
7.00
0.76
0.00
0.00
8.00
0.92
0.00
0.03
9.00
1.13
0.02
0.15
10.00
1.39
0.07
0.33
11.00
1.81
0.19
0.88
12.00
5.11
2.20
32.02
13.00
5.94
2.85
2.28
14.00
6.31
3.15
1.34
15.00
6.57
3.37
1.05
16.00
6.78
3.54
0.82
17.00
6.94
3.68
0.72
18.00
7.09
3.80
0.63
19.00
7.22
3.91
0.55
20.00
7.33
4.00
0.47
21.00
7.43
4.09
0.44
22.00
7.52
4.17
0.42
23.00
7.61
4.25
0.41
24.00
7.70
4.32
0.39
25.00
7.70
4.32
0.00
26.00
7.70
4.32
0.00
27.00
7.70
4.32
0.00
28.00
7.70
4.32
0.00
29.00
7.70
4.32
0.00
30.00
7.70
4.32
0.00
31.00
7.70
4.32
0.00
32.00
7.70
4.32
0.00
33.00
7.70
4.32
0.00
34.00
7.70
4.32
0.00
35.00
7.70
4.32
0.00
36.00
7.70
4.32
0.00
37.00
7.70
4.32
0.00
38.00
7.70
4.32
0.00
39.00
7.70
4.32
0.00
40.00
7.70
4.32
0.00
41.00
7.70
4.32
0.00
42.00
7.70
4.32
0.00
43.00
7.70
4.32
0.00
44.00
7.70
4.32
0.00
45.00
7.70
4.32
0.00
46.00
7.70
4.32
0.00
47.00
7.70
4.32
0.00
48.00
7.70
4.32
0.00
49.00
7.70
4.32
0.00
50.00
7.70
4.32
0.00
51.00
7.70
4.32
0.00
52.00
7.70
4.32
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.70
4.32
0.00
54.00
7.70
4.32
0.00
55.00
7.70
4.32
0.00
56.00
7.70
4.32
0.00
57.00
7.70
4.32
0.00
58.00
7.70
4.32
0.00
59.00
7.70
4.32
0.00
60.00
7.70
4.32
0.00
61.00
7.70
4.32
0.00
62.00
7.70
4.32
0.00
63.00
7.70
4.32
0.00
64.00
7.70
4.32
0.00
65.00
7.70
4.32
0.00
66.00
7.70
4.32
0.00
67.00
7.70
4.32
0.00
68.00
7.70
4.32
0.00
69.00
7.70
4.32
0.00
70.00
7.70
4.32
0.00
71.00
7.70
4.32
0.00
72.00
7.70
4.32
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 249
Summary for Subcatchment PRE-POI#2: Pre -Development POI#2
Runoff = 18.81 cfs @ 12.11 hrs, Volume= 1.357 af, Depth= 3.65"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 Year Rainfall=7.70"
Area (ac) CN Description
4.456 65 Woods/grass comb., Fair, HSG B
4.456 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.4 Direct Entry,
a
1£
1E
17
1E
1E
14
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Hydrograph
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Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 250
Hydrograph for Subcatchment PRE-POI#2: Pre -Development POI#2
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.08
0.00
0.00
2.00
0.17
0.00
0.00
3.00
0.27
0.00
0.00
4.00
0.37
0.00
0.00
5.00
0.49
0.00
0.00
6.00
0.62
0.00
0.00
7.00
0.76
0.00
0.00
8.00
0.92
0.00
0.00
9.00
1.13
0.00
0.00
10.00
1.39
0.02
0.10
11.00
1.81
0.09
0.40
12.00
5.11
1.72
13.23
13.00
5.94
2.31
1.91
14.00
6.31
2.58
1.09
15.00
6.57
2.78
0.83
16.00
6.78
2.93
0.66
17.00
6.94
3.06
0.56
18.00
7.09
3.17
0.50
19.00
7.22
3.27
0.44
20.00
7.33
3.36
0.37
21.00
7.43
3.44
0.34
22.00
7.52
3.51
0.33
23.00
7.61
3.58
0.32
24.00
7.70
3.65
0.31
25.00
7.70
3.65
0.00
26.00
7.70
3.65
0.00
27.00
7.70
3.65
0.00
28.00
7.70
3.65
0.00
29.00
7.70
3.65
0.00
30.00
7.70
3.65
0.00
31.00
7.70
3.65
0.00
32.00
7.70
3.65
0.00
33.00
7.70
3.65
0.00
34.00
7.70
3.65
0.00
35.00
7.70
3.65
0.00
36.00
7.70
3.65
0.00
37.00
7.70
3.65
0.00
38.00
7.70
3.65
0.00
39.00
7.70
3.65
0.00
40.00
7.70
3.65
0.00
41.00
7.70
3.65
0.00
42.00
7.70
3.65
0.00
43.00
7.70
3.65
0.00
44.00
7.70
3.65
0.00
45.00
7.70
3.65
0.00
46.00
7.70
3.65
0.00
47.00
7.70
3.65
0.00
48.00
7.70
3.65
0.00
49.00
7.70
3.65
0.00
50.00
7.70
3.65
0.00
51.00
7.70
3.65
0.00
52.00
7.70
3.65
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.70
3.65
0.00
54.00
7.70
3.65
0.00
55.00
7.70
3.65
0.00
56.00
7.70
3.65
0.00
57.00
7.70
3.65
0.00
58.00
7.70
3.65
0.00
59.00
7.70
3.65
0.00
60.00
7.70
3.65
0.00
61.00
7.70
3.65
0.00
62.00
7.70
3.65
0.00
63.00
7.70
3.65
0.00
64.00
7.70
3.65
0.00
65.00
7.70
3.65
0.00
66.00
7.70
3.65
0.00
67.00
7.70
3.65
0.00
68.00
7.70
3.65
0.00
69.00
7.70
3.65
0.00
70.00
7.70
3.65
0.00
71.00
7.70
3.65
0.00
72.00
7.70
3.65
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 251
Summary for Subcatchment PRE-POI#3: Pre -Development P0I#3
Runoff = 29.38 cfs @ 12.13 hrs, Volume= 2.222 af, Depth= 3.76"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 Year Rainfall=7.70"
Area (ac) CN
Description
6.950 65
Woods/grass comb., Fair, HSG B
0.137 98
Paved roads w/curbs & sewers, HSG B
7.087 66
Weighted Average
6.950
98.07% Pervious Area
0.137
1.93% Impervious Area
Tc Length
Slope Velocity Capacity Description
(min) (feet)
(ft/ft) (ft/sec) (cfs)
20.0
Direct Entry,
Subcatchment PRE-POI#3: Pre -Development P0I#3
Hydrograph
32
30
29.38
cfs
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Time (hours)
■ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 252
Hydrograph for Subcatchment PRE-POI#3: Pre -Development POI#3
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.08
0.00
0.00
2.00
0.17
0.00
0.00
3.00
0.27
0.00
0.00
4.00
0.37
0.00
0.00
5.00
0.49
0.00
0.00
6.00
0.62
0.00
0.00
7.00
0.76
0.00
0.00
8.00
0.92
0.00
0.00
9.00
1.13
0.00
0.02
10.00
1.39
0.02
0.19
11.00
1.81
0.10
0.68
12.00
5.11
1.80
19.42
13.00
5.94
2.40
3.21
14.00
6.31
2.68
1.79
15.00
6.57
2.87
1.35
16.00
6.78
3.03
1.07
17.00
6.94
3.16
0.91
18.00
7.09
3.28
0.81
19.00
7.22
3.38
0.71
20.00
7.33
3.47
0.60
21.00
7.43
3.54
0.56
22.00
7.52
3.62
0.54
23.00
7.61
3.69
0.52
24.00
7.70
3.76
0.50
25.00
7.70
3.76
0.00
26.00
7.70
3.76
0.00
27.00
7.70
3.76
0.00
28.00
7.70
3.76
0.00
29.00
7.70
3.76
0.00
30.00
7.70
3.76
0.00
31.00
7.70
3.76
0.00
32.00
7.70
3.76
0.00
33.00
7.70
3.76
0.00
34.00
7.70
3.76
0.00
35.00
7.70
3.76
0.00
36.00
7.70
3.76
0.00
37.00
7.70
3.76
0.00
38.00
7.70
3.76
0.00
39.00
7.70
3.76
0.00
40.00
7.70
3.76
0.00
41.00
7.70
3.76
0.00
42.00
7.70
3.76
0.00
43.00
7.70
3.76
0.00
44.00
7.70
3.76
0.00
45.00
7.70
3.76
0.00
46.00
7.70
3.76
0.00
47.00
7.70
3.76
0.00
48.00
7.70
3.76
0.00
49.00
7.70
3.76
0.00
50.00
7.70
3.76
0.00
51.00
7.70
3.76
0.00
52.00
7.70
3.76
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.70
3.76
0.00
54.00
7.70
3.76
0.00
55.00
7.70
3.76
0.00
56.00
7.70
3.76
0.00
57.00
7.70
3.76
0.00
58.00
7.70
3.76
0.00
59.00
7.70
3.76
0.00
60.00
7.70
3.76
0.00
61.00
7.70
3.76
0.00
62.00
7.70
3.76
0.00
63.00
7.70
3.76
0.00
64.00
7.70
3.76
0.00
65.00
7.70
3.76
0.00
66.00
7.70
3.76
0.00
67.00
7.70
3.76
0.00
68.00
7.70
3.76
0.00
69.00
7.70
3.76
0.00
70.00
7.70
3.76
0.00
71.00
7.70
3.76
0.00
72.00
7.70
3.76
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 253
Summary for Subcatchment PRE-POI#4: Pre -Development P0I#4
Runoff = 12.29 cfs @ 12.08 hrs, Volume= 0.822 af, Depth= 3.87"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 Year Rainfall=7.70"
Area (ac) CN Description
2.410 65 Woods/grass comb., Fair, HSG B
0.135 98 Paved parking, HSG B
2.545 67 Weighted Average
2.410 94.70% Pervious Area
0.135 5.30% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
15.9 Direct Entry,
Subcatchment PRE-POI#4: Pre -Development P0I#4
Hydrograph
13
12
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2 4 6 8 10 12 14
16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 4850 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
0
0
■ Runoff

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 254
Hydrograph for Subcatchment PRE-POI#4: Pre -Development POI#4
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.08
0.00
0.00
2.00
0.17
0.00
0.00
3.00
0.27
0.00
0.00
4.00
0.37
0.00
0.00
5.00
0.49
0.00
0.00
6.00
0.62
0.00
0.00
7.00
0.76
0.00
0.00
8.00
0.92
0.00
0.00
9.00
1.13
0.00
0.02
10.00
1.39
0.03
0.09
11.00
1.81
0.12
0.29
12.00
5.11
1.88
9.80
13.00
5.94
2.49
1.10
14.00
6.31
2.77
0.63
15.00
6.57
2.97
0.49
16.00
6.78
3.13
0.38
17.00
6.94
3.26
0.33
18.00
7.09
3.38
0.29
19.00
7.22
3.48
0.26
20.00
7.33
3.57
0.22
21.00
7.43
3.65
0.20
22.00
7.52
3.73
0.20
23.00
7.61
3.80
0.19
24.00
7.70
3.87
0.18
25.00
7.70
3.87
0.00
26.00
7.70
3.87
0.00
27.00
7.70
3.87
0.00
28.00
7.70
3.87
0.00
29.00
7.70
3.87
0.00
30.00
7.70
3.87
0.00
31.00
7.70
3.87
0.00
32.00
7.70
3.87
0.00
33.00
7.70
3.87
0.00
34.00
7.70
3.87
0.00
35.00
7.70
3.87
0.00
36.00
7.70
3.87
0.00
37.00
7.70
3.87
0.00
38.00
7.70
3.87
0.00
39.00
7.70
3.87
0.00
40.00
7.70
3.87
0.00
41.00
7.70
3.87
0.00
42.00
7.70
3.87
0.00
43.00
7.70
3.87
0.00
44.00
7.70
3.87
0.00
45.00
7.70
3.87
0.00
46.00
7.70
3.87
0.00
47.00
7.70
3.87
0.00
48.00
7.70
3.87
0.00
49.00
7.70
3.87
0.00
50.00
7.70
3.87
0.00
51.00
7.70
3.87
0.00
52.00
7.70
3.87
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.70
3.87
0.00
54.00
7.70
3.87
0.00
55.00
7.70
3.87
0.00
56.00
7.70
3.87
0.00
57.00
7.70
3.87
0.00
58.00
7.70
3.87
0.00
59.00
7.70
3.87
0.00
60.00
7.70
3.87
0.00
61.00
7.70
3.87
0.00
62.00
7.70
3.87
0.00
63.00
7.70
3.87
0.00
64.00
7.70
3.87
0.00
65.00
7.70
3.87
0.00
66.00
7.70
3.87
0.00
67.00
7.70
3.87
0.00
68.00
7.70
3.87
0.00
69.00
7.70
3.87
0.00
70.00
7.70
3.87
0.00
71.00
7.70
3.87
0.00
72.00
7.70
3.87
0.00

Weddington Acres HydroCAD Revised Layout Type/1 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 255
Summary for Pond DET POND-1: Detention Pond #1
Inflow Area = 16.500 ac, 18.59% Impervious, Inflow Depth = 3.76" for 100 Year event
Inflow = 58.96 cfs @ 12.20 hrs, Volume= 5.174 of
Outflow = 36.11 cfs @ 12.42 hrs, Volume= 4.862 af, Atten= 39%, Lag= 13.1 min
Primary = 36.11 cfs @ 12.42 hrs, Volume= 4.862 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Peak Elev= 714.20' @ 12.42 hrs Surf.Area= 17,919 sf Storage= 69,225 cf
Plug -Flow detention time= 198.5 min calculated for 4.859 of (94% of inflow)
Center -of -Mass det. time= 167.1 min ( 1,017.2 - 850.1 )
Volume Invert Avail.Storage Storage Description
#1 708.00' 104,832 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
708.00 2,289 0 0
709.00 5,540 3,915 3,915
710.00 8,705 7,123 11,037
711.00 11,744 10,225 21,262
712.00 14,012 12,878 34,140
713.00 15,752 14,882 49,022
714.00 17,548 16,650 65,672
715.00 19,401 18,475 84,146
716.00 21,970 20,686 104,832
Device Routing Invert Outlet Devices
#1 Primary 707.00' 36.0" Round Culvert
L= 111.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 707.00' / 705.00' S= 0.0180 '/' Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 7.07 sf
#2 Device 1 708.00' 1.3" Vert. WQ C= 0.600
#3 Device 1 711.33' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 2.67
Width (feet) 2.00 2.00
#4 Device 1 714.00' 48.0" x 48.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 715.00' 18.0' long x 18.0' 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) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Primary OutFlow Max=35.68 cfs @ 12.42 hrs HW=714.19' (Free Discharge)
L1=Culvert (Passes 35.68 cfs of 81.20 cfs potential flow)
2=WQ (Orifice Controls 0.11 cfs @ 11.93 fps)
3=Custom Weir/Orifice (Orifice Controls 31.16 cfs @ 5.84 fps)
4=Orifi ce/G rate (Weir Controls 4.41 cfs @ 1.43 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=708.00' (Free Discharge)
L5= Broad -Crested Rectangular Weir( Controls 0.00 cfs)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 256
Pond DET POND-1: Detention Pond #1
Hydrograph
ITT1thI-TtIT1It
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1 !
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infidw Area=116� 50101 acl
65
60
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7
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55
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14
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50
45
36.11 cfs
ITI
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20
15
11
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10
0.00
cfs
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
Pond DET POND-1: Detention Pond #1
Stage -Discharge
716
/I
715
714
Custom WeirP
1
•
1:
1
1
60 80 100 120 140
Discharge (cfs)
Lw
ow
aryndary
❑ Total
❑ Primary
❑ Secondary

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 257
m
713
d
c 712
d
w 711
708 Q
0
Pond DET POND-1: Detention Pond #1
Stage -Area -Storage
Surface/HorizontaiMetted Area (sq-ft)
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000
40,000 50,000 60,000 70,000 80,000 90,000 100,000
Storage (cubic -feet)
Surface
❑ Storage

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
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Hydrograph for Pond DET POND-1: Detention Pond #1
Time
Inflow
Storage
Elevation
Outflow
Primary
Secondary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
(cfs)
(cfs)
0.00
0.00
0
708.00
0.00
0.00
0.00
2.50
0.00
0
708.00
0.00
0.00
0.00
5.00
0.00
0
708.00
0.00
0.00
0.00
7.50
0.00
0
708.00
0.00
0.00
0.00
10.00
0.40
699
708.26
0.02
0.02
0.00
12.50
26.71
67,989
714.13
33.06
33.06
0.00
15.00
3.21
34,278
712.01
3.76
3.76
0.00
17.50
2.03
31,369
711.80
2.19
2.19
0.00
20.00
1.43
30,064
711.70
1.58
1.58
0.00
22.50
1.23
29,355
711.65
1.27
1.27
0.00
25.00
0.01
27,441
711.50
0.56
0.56
0.00
27.50
0.00
25,419
711.34
0.09
0.09
0.00
30.00
0.00
24,685
711.28
0.08
0.08
0.00
32.50
0.00
23,971
711.23
0.08
0.08
0.00
35.00
0.00
23,262
711.17
0.08
0.08
0.00
37.50
0.00
22,561
711.11
0.08
0.08
0.00
40.00
0.00
21,866
711.05
0.08
0.08
0.00
42.50
0.00
21,178
710.99
0.08
0.08
0.00
45.00
0.00
20,497
710.93
0.08
0.08
0.00
47.50
0.00
19,822
710.88
0.07
0.07
0.00
50.00
0.00
19,155
710.82
0.07
0.07
0.00
52.50
0.00
18,495
710.76
0.07
0.07
0.00
55.00
0.00
17,842
710.70
0.07
0.07
0.00
57.50
0.00
17,196
710.64
0.07
0.07
0.00
60.00
0.00
16,558
710.58
0.07
0.07
0.00
62.50
0.00
15,928
710.52
0.07
0.07
0.00
65.00
0.00
15,305
710.45
0.07
0.07
0.00
67.50
0.00
14,690
710.39
0.07
0.07
0.00
70.00
0.00
14,083
710.33
0.07
0.07
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 259
Stage -Discharge for Pond DET POND-1: Detention Pond #1
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
708.00
0.00
0.00
0.00
708.10
0.01
0.01
0.00
708.20
0.02
0.02
0.00
708.30
0.02
0.02
0.00
708.40
0.03
0.03
0.00
708.50
0.03
0.03
0.00
708.60
0.03
0.03
0.00
708.70
0.04
0.04
0.00
708.80
0.04
0.04
0.00
708.90
0.04
0.04
0.00
709.00
0.04
0.04
0.00
709.10
0.05
0.05
0.00
709.20
0.05
0.05
0.00
709.30
0.05
0.05
0.00
709.40
0.05
0.05
0.00
709.50
0.05
0.05
0.00
709.60
0.06
0.06
0.00
709.70
0.06
0.06
0.00
709.80
0.06
0.06
0.00
709.90
0.06
0.06
0.00
710.00
0.06
0.06
0.00
710.10
0.06
0.06
0.00
710.20
0.07
0.07
0.00
710.30
0.07
0.07
0.00
710.40
0.07
0.07
0.00
710.50
0.07
0.07
0.00
710.60
0.07
0.07
0.00
710.70
0.07
0.07
0.00
710.80
0.07
0.07
0.00
710.90
0.07
0.07
0.00
711.00
0.08
0.08
0.00
711.10
0.08
0.08
0.00
711.20
0.08
0.08
0.00
711.30
0.08
0.08
0.00
711.40
0.20
0.20
0.00
711.50
0.54
0.54
0.00
711.60
1.00
1.00
0.00
711.70
1.56
1.56
0.00
711.80
2.20
2.20
0.00
711.90
2.91
2.91
0.00
712.00
3.68
3.68
0.00
712.10
4.51
4.51
0.00
712.20
5.41
5.41
0.00
712.30
6.35
6.35
0.00
712.40
7.34
7.34
0.00
712.50
8.38
8.38
0.00
712.60
9.47
9.47
0.00
712.70
10.60
10.60
0.00
712.80
11.77
11.77
0.00
712.90
12.98
12.98
0.00
713.00
14.23
14.23
0.00
713.10
15.52
15.52
0.00
713.20
16.85
16.85
0.00
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
713.30
18.21
18.21
0.00
713.40
19.61
19.61
0.00
713.50
21.04
21.04
0.00
713.60
22.51
22.51
0.00
713.70
24.00
24.00
0.00
713.80
25.53
25.53
0.00
713.90
27.09
27.09
0.00
714.00
28.68
28.68
0.00
714.10
31.75
31.75
0.00
714.20
36.05
36.05
0.00
714.30
41.16
41.16
0.00
714.40
46.92
46.92
0.00
714.50
53.26
53.26
0.00
714.60
60.12
60.12
0.00
714.70
67.44
67.44
0.00
714.80
75.20
75.20
0.00
714.90
83.38
83.38
0.00
715.00
86.77
86.77
0.00
715.10
88.96
87.44
1.53
715.20
92.41
88.10
4.31
715.30
96.71
88.75
7.96
715.40
101.70
89.40
12.29
715.50
107.23
90.05
17.18
715.60
113.28
90.69
22.59
715.70
119.47
91.33
28.15
715.80
125.96
91.96
34.00
715.90
133.08
92.59
40.50
716.00
140.55
93.21
47.34

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 260
Stage -Area -Storage for Pond DET POND-1: Detention Pond #1
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
708.00
2,289
0
708.10
2,614
245
708.20
2,939
523
708.30
3,264
833
708.40
3,589
1,176
708.50
3,915
1,551
708.60
4,240
1,959
708.70
4,565
2,399
708.80
4,890
2,872
708.90
5,215
3,377
709.00
5,540
3,915
709.10
5,857
4,484
709.20
6,173
5,086
709.30
6,489
5,719
709.40
6,806
6,384
709.50
7,123
7,080
709.60
7,439
7,808
709.70
7,756
8,568
709.80
8,072
9,359
709.90
8,388
10,182
710.00
8,705
11,037
710.10
9,009
11,923
710.20
9,313
12,839
710.30
9,617
13,785
710.40
9,921
14,762
710.50
10,225
15,769
710.60
10,528
16,807
710.70
10,832
17,875
710.80
11,136
18,973
710.90
11,440
20,102
711.00
11,744
21,262
711.10
11,971
22,447
711.20
12,198
23,656
711.30
12,424
24,887
711.40
12,651
26,141
711.50
12,878
27,417
711.60
13,105
28,716
711.70
13,332
30,038
711.80
13,558
31,382
711.90
13,785
32,750
712.00
14,012
34,140
712.10
14,186
35,549
712.20
14,360
36,977
712.30
14,534
38,421
712.40
14,708
39,883
712.50
14,882
41,363
712.60
15,056
42,860
712.70
15,230
44,374
712.80
15,404
45,906
712.90
15,578
47,455
713.00
15,752
49,022
713.10
15,932
50,606
713.20
16,111
52,208
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
713.30
16,291
53,828
713.40
16,470
55,466
713.50
16,650
57,122
713.60
16,830
58,796
713.70
17,009
60,488
713.80
17,189
62,198
713.90
17,368
63,926
714.00
17,548
65,672
714.10
17,733
67,436
714.20
17,919
69,218
714.30
18,104
71,019
714.40
18,289
72,839
714.50
18,475
74,677
714.60
18,660
76,534
714.70
18,845
78,409
714.80
19,030
80,303
714.90
19,216
82,215
715.00
19,401
84,146
715.10
19,658
86,099
715.20
19,915
88,078
715.30
20,172
90,082
715.40
20,429
92,112
715.50
20,686
94,168
715.60
20,942
96,249
715.70
21,199
98,356
715.80
21,456
100,489
715.90
21,713
102,647
716.00
21,970
104,832

Weddington Acres HydroCAD Revised Layout Type/1 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 261
Summary for Pond DET POND-2: Detention Pond #2
Inflow Area = 5.248 ac, 29.12% Impervious, Inflow Depth = 4.32" for 100 Year event
Inflow = 33.10 cfs @ 12.03 hrs, Volume= 1.889 of
Outflow = 19.36 cfs @ 12.14 hrs, Volume= 1.870 af, Atten= 42%, Lag= 6.9 min
Primary = 19.36 cfs @ 12.14 hrs, Volume= 1.870 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Peak Elev= 700.87' @ 12.14 hrs Surf.Area= 9,484 sf Storage= 26,344 cf
Plug -Flow detention time= 250.4 min calculated for 1.869 of (99% of inflow)
Center -of -Mass det. time= 246.1 min ( 1,072.0 - 825.9 )
Volume Invert Avail.Storage Storage Description
#1 697.00' 49,496 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
697.00 3,325 0 0
698.00 5,881 4,603 4,603
699.00 6,979 6,430 11,033
700.00 8,219 7,599 18,632
701.00 9,671 8,945 27,577
702.00 11,155 10,413 37,990
703.00 11,857 11,506 49,496
Device Routing Invert Outlet Devices
#1 Primary 696.00' 24.0" Round RCP -Round 24"
L= 66.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 696.00' / 695.00' S= 0.0152 '/' Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 3.14 sf
#2 Device 1 697.00' 1.5" Vert. WQ C= 0.600
#3 Device 1 698.82' Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 2.18
Width (feet) 2.00 2.00
#4 Device 1 701.00' 48.0" x 48.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 702.00' 10.0' 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=19.25 cfs @ 12.14 hrs HW=700.86' (Free Discharge)
L1=RCP_Round 24" (Passes 19.25 cfs of 29.73 cfs potential flow)
2=WQ (Orifice Controls 0.12 cfs @ 9.39 fps)
3=Custom Weir/Orifice (Weir Controls 19.14 cfs @ 4.68 fps)
4=Orifi ce/G rate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=697.00' (Free Discharge)
L5= Broad -Crested Rectangular Weir( Controls 0.00 cfs)

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 262
Pond DET POND-2: Detention Pond #2
Hydrograph
-
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28
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---------------
Pond DET POND-2: Detention Pond #2
Stage -Discharge
0 5 10 15 20 25 30 35 40 45 50 55 60
Discharge (cfs)
Mry
■ Total
■ Primary
■ Secondary

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 263
Pond DET POND-2: Detention Pond #2
Stage -Area -Storage
Surface/Horizontal/Wetted Area (sq-ft)
1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000
Storage (cubic -feet)
Surface
❑ Storage

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 264
Hydrograph for Pond DET POND-2: Detention Pond #2
Time
Inflow
Storage
Elevation
Outflow
Primary
Secondary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
(cfs)
(cfs)
0.00
0.00
0
697.00
0.00
0.00
0.00
2.50
0.00
0
697.00
0.00
0.00
0.00
5.00
0.00
0
697.00
0.00
0.00
0.00
7.50
0.00
0
697.00
0.00
0.00
0.00
10.00
0.33
1,064
697.29
0.03
0.03
0.00
12.50
4.08
18,647
700.00
8.52
8.52
0.00
15.00
1.05
11,857
699.12
1.15
1.15
0.00
17.50
0.67
11,239
699.03
0.71
0.71
0.00
20.00
0.47
10,901
698.98
0.51
0.51
0.00
22.50
0.41
10,741
698.96
0.42
0.42
0.00
25.00
0.00
10,030
698.85
0.12
0.12
0.00
27.50
0.00
9,281
698.74
0.08
0.08
0.00
30.00
0.00
8,602
698.64
0.07
0.07
0.00
32.50
0.00
7,944
698.54
0.07
0.07
0.00
35.00
0.00
7,309
698.44
0.07
0.07
0.00
37.50
0.00
6,695
698.34
0.07
0.07
0.00
40.00
0.00
6,105
698.25
0.06
0.06
0.00
42.50
0.00
5,537
698.16
0.06
0.06
0.00
45.00
0.00
4,992
698.07
0.06
0.06
0.00
47.50
0.00
4,472
697.98
0.06
0.06
0.00
50.00
0.00
3,975
697.89
0.05
0.05
0.00
52.50
0.00
3,504
697.80
0.05
0.05
0.00
55.00
0.00
3,059
697.72
0.05
0.05
0.00
57.50
0.00
2,642
697.64
0.04
0.04
0.00
60.00
0.00
2,253
697.56
0.04
0.04
0.00
62.50
0.00
1,894
697.48
0.04
0.04
0.00
65.00
0.00
1,566
697.41
0.03
0.03
0.00
67.50
0.00
1,271
697.34
0.03
0.03
0.00
70.00
0.00
1,009
697.27
0.03
0.03
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 265
Stage -Discharge for Pond DET POND-2: Detention Pond #2
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
697.00
0.00
0.00
0.00
697.10
0.01
0.01
0.00
697.20
0.02
0.02
0.00
697.30
0.03
0.03
0.00
697.40
0.03
0.03
0.00
697.50
0.04
0.04
0.00
697.60
0.04
0.04
0.00
697.70
0.05
0.05
0.00
697.80
0.05
0.05
0.00
697.90
0.05
0.05
0.00
698.00
0.06
0.06
0.00
698.10
0.06
0.06
0.00
698.20
0.06
0.06
0.00
698.30
0.07
0.07
0.00
698.40
0.07
0.07
0.00
698.50
0.07
0.07
0.00
698.60
0.07
0.07
0.00
698.70
0.08
0.08
0.00
698.80
0.08
0.08
0.00
698.90
0.23
0.23
0.00
699.00
0.58
0.58
0.00
699.10
1.05
1.05
0.00
699.20
1.62
1.62
0.00
699.30
2.27
2.27
0.00
699.40
2.98
2.98
0.00
699.50
3.77
3.77
0.00
699.60
4.61
4.61
0.00
699.70
5.50
5.50
0.00
699.80
6.45
6.45
0.00
699.90
7.45
7.45
0.00
700.00
8.50
8.50
0.00
700.10
9.59
9.59
0.00
700.20
10.72
10.72
0.00
700.30
11.90
11.90
0.00
700.40
13.12
13.12
0.00
700.50
14.37
14.37
0.00
700.60
15.67
15.67
0.00
700.70
17.00
17.00
0.00
700.80
18.36
18.36
0.00
700.90
19.76
19.76
0.00
701.00
21.20
21.20
0.00
701.10
24.12
24.12
0.00
701.20
28.26
28.26
0.00
701.30
31.37
31.37
0.00
701.40
31.73
31.73
0.00
701.50
32.09
32.09
0.00
701.60
32.44
32.44
0.00
701.70
32.79
32.79
0.00
701.80
33.14
33.14
0.00
701.90
33.48
33.48
0.00
702.00
33.82
33.82
0.00
702.10
34.95
34.16
0.79
702.20
36.72
34.49
2.23
Elevation Discharge Primary Secondary
(feet)
(cfs)
(cfs)
(cfs)
702.30
38.97
34.82
4.15
702.40
41.63
35.15
6.48
702.50
44.77
35.48
9.30
702.60
48.34
35.80
12.55
702.70
51.90
36.11
15.78
702.80
55.68
36.43
19.25
702.90
59.67
36.74
22.92
703.00
63.85
37.05
26.80

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 266
Stage -Area -Storage for Pond DET POND-2: Detention Pond #2
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
697.00
3,325
0
697.10
3,581
345
697.20
3,836
716
697.30
4,092
1,113
697.40
4,347
1,534
697.50
4,603
1,982
697.60
4,859
2,455
697.70
5,114
2,954
697.80
5,370
3,478
697.90
5,625
4,028
698.00
5,881
4,603
698.10
5,991
5,197
698.20
6,101
5,801
698.30
6,210
6,417
698.40
6,320
7,043
698.50
6,430
7,681
698.60
6,540
8,329
698.70
6,650
8,989
698.80
6,759
9,659
698.90
6,869
10,341
699.00
6,979
11,033
699.10
7,103
11,737
699.20
7,227
12,454
699.30
7,351
13,182
699.40
7,475
13,924
699.50
7,599
14,678
699.60
7,723
15,444
699.70
7,847
16,222
699.80
7,971
17,013
699.90
8,095
17,816
700.00
8,219
18,632
700.10
8,364
19,461
700.20
8,509
20,305
700.30
8,655
21,163
700.40
8,800
22,036
700.50
8,945
22,923
700.60
9,090
23,825
700.70
9,235
24,741
700.80
9,381
25,672
700.90
9,526
26,617
701.00
9,671
27,577
701.10
9,819
28,552
701.20
9,968
29,541
701.30
10,116
30,545
701.40
10,265
31,564
701.50
10,413
32,598
701.60
10,561
33,647
701.70
10,710
34,710
701.80
10,858
35,789
701.90
11,007
36,882
702.00
11,155
37,990
702.10
11,225
39,109
702.20
11,295
40,235
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
702.30
11,366
41,368
702.40
11,436
42,508
702.50
11,506
43,655
702.60
11,576
44,809
702.70
11,646
45,970
702.80
11,717
47,139
702.90
11,787
48,314
703.00
11,857
49,496

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD®10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 267
Summary for Link 4L: Pre -Development POI
Inflow Area = 36.865 ac, 0.00% Impervious, Inflow Depth = 2.81" for 100 Year event
Inflow = 102.39 cfs @ 12.16 hrs, Volume= 8.639 of
Primary = 102.39 cfs @ 12.16 hrs, Volume= 8.639 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Link 4L: Pre -Development POI
Hydrograph
H HIJ_I
H
I I
110
105
102.39 cfs
HI
H
IH
H H
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4651 �C
100 95
95
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H
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H
90
85
H
HI
H
IH
1 H H 1
HI
H
IH
1 H 1 H 1
HI
H
80
75
70
71
H
I111111LI
H
IH11111D
H
a 65
60
I
HI
H
IH
14 H 1
HI
H
IH
1 H 1 H 1
HI
H
3 55
0
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5
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40
35
IHI
H
IHIHIHIHI
H
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30
20
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H
HI�I�I
H
15
10
5
0
0 2 4
6 8 10 12 14 16 18 20
22 24
26 28
30 32 34 36 38 40 42
Time (hours)
44 46
48 50
52 54
56 58 60 62 64
66 68
70 72
❑ Inflow
❑ Primary

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 268
Hydrograph for Link 4L: Pre -Development POI
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.00
0.00
0.00
2.00
0.00
0.00
0.00
3.00
0.00
0.00
0.00
4.00
0.00
0.00
0.00
5.00
0.00
0.00
0.00
6.00
0.00
0.00
0.00
7.00
0.00
0.00
0.00
8.00
0.00
0.00
0.00
9.00
0.00
0.00
0.00
10.00
0.00
0.00
0.00
11.00
0.72
0.00
0.72
12.00
57.38
0.00
57.38
13.00
14.53
0.00
14.53
14.00
7.85
0.00
7.85
15.00
5.93
0.00
5.93
16.00
4.74
0.00
4.74
17.00
4.04
0.00
4.04
18.00
3.61
0.00
3.61
19.00
3.17
0.00
3.17
20.00
2.70
0.00
2.70
21.00
2.49
0.00
2.49
22.00
2.41
0.00
2.41
23.00
2.32
0.00
2.32
24.00
2.23
0.00
2.23
25.00
0.01
0.00
0.01
26.00
0.00
0.00
0.00
27.00
0.00
0.00
0.00
28.00
0.00
0.00
0.00
29.00
0.00
0.00
0.00
30.00
0.00
0.00
0.00
31.00
0.00
0.00
0.00
32.00
0.00
0.00
0.00
33.00
0.00
0.00
0.00
34.00
0.00
0.00
0.00
35.00
0.00
0.00
0.00
36.00
0.00
0.00
0.00
37.00
0.00
0.00
0.00
38.00
0.00
0.00
0.00
39.00
0.00
0.00
0.00
40.00
0.00
0.00
0.00
41.00
0.00
0.00
0.00
42.00
0.00
0.00
0.00
43.00
0.00
0.00
0.00
44.00
0.00
0.00
0.00
45.00
0.00
0.00
0.00
46.00
0.00
0.00
0.00
47.00
0.00
0.00
0.00
48.00
0.00
0.00
0.00
49.00
0.00
0.00
0.00
50.00
0.00
0.00
0.00
51.00
0.00
0.00
0.00
52.00
0.00
0.00
0.00
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.00
0.00
0.00
54.00
0.00
0.00
0.00
55.00
0.00
0.00
0.00
56.00
0.00
0.00
0.00
57.00
0.00
0.00
0.00
58.00
0.00
0.00
0.00
59.00
0.00
0.00
0.00
60.00
0.00
0.00
0.00
61.00
0.00
0.00
0.00
62.00
0.00
0.00
0.00
63.00
0.00
0.00
0.00
64.00
0.00
0.00
0.00
65.00
0.00
0.00
0.00
66.00
0.00
0.00
0.00
67.00
0.00
0.00
0.00
68.00
0.00
0.00
0.00
69.00
0.00
0.00
0.00
70.00
0.00
0.00
0.00
71.00
0.00
0.00
0.00
72.00
0.00
0.00
0.00

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 269
Summary for Link P0I#1: Post -Development P0I#1
Inflow Area = 42.987 ac, 10.69% Impervious, Inflow Depth > 3.40" for 100 Year event
Inflow = 99.55 cfs @ 12.19 hrs, Volume= 12.174 of
Primary = 99.55 cfs @ 12.19 hrs, Volume= 12.174 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs
Link P0I#1: Post -Development P0I#1
Hydrograph
Irt
Irt — HI
H
Irt
Irt —
HI
� I
fil
H
99.55 cfs H
H--
H
1105
00
95
H
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H
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H
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885
0
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HI
H
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75
70
—
IH
— —
HI
—
H
—
IH
— —
14 H I
—
HI
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60
fit
H
Irt
It tI
HI
H
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fit
H
3 55
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45
IHI
H
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HI
H
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40
35
HI
H
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HI
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14 I H I
HI
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30
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15
10
1012141618202224262830323436384042444648505254565860626466687072
Time (hours)
❑ Inflow
❑ Primary

Weddington Acres HydroCAD Revised Layout Type // 24-hr 100 Year Rainfall=7.70"
Prepared by Microsoft Printed 5/27/2020
HydroCAD® 10.00-15 s/n 08484 ©2015 HydroCAD Software Solutions LLC Page 270
Hydrograph for Link P0I#1: Post -Development P0I#1
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
0.00
0.00
0.00
0.00
1.00
0.00
0.00
0.00
2.00
0.00
0.00
0.00
3.00
0.00
0.00
0.00
4.00
0.00
0.00
0.00
5.00
0.00
0.00
0.00
6.00
0.00
0.00
0.00
7.00
0.00
0.00
0.00
8.00
0.00
0.00
0.00
9.00
0.01
0.00
0.01
10.00
0.05
0.00
0.05
11.00
0.90
0.00
0.90
12.00
50.57
0.00
50.57
13.00
28.89
0.00
28.89
14.00
12.44
0.00
12.44
15.00
8.52
0.00
8.52
16.00
6.71
0.00
6.71
17.00
5.57
0.00
5.57
18.00
4.92
0.00
4.92
19.00
4.32
0.00
4.32
20.00
3.72
0.00
3.72
21.00
3.34
0.00
3.34
22.00
3.18
0.00
3.18
23.00
3.06
0.00
3.06
24.00
2.94
0.00
2.94
25.00
0.69
0.00
0.69
26.00
0.30
0.00
0.30
27.00
0.19
0.00
0.19
28.00
0.16
0.00
0.16
29.00
0.16
0.00
0.16
30.00
0.15
0.00
0.15
31.00
0.15
0.00
0.15
32.00
0.15
0.00
0.15
33.00
0.15
0.00
0.15
34.00
0.15
0.00
0.15
35.00
0.15
0.00
0.15
36.00
0.15
0.00
0.15
37.00
0.15
0.00
0.15
38.00
0.14
0.00
0.14
39.00
0.14
0.00
0.14
40.00
0.14
0.00
0.14
41.00
0.14
0.00
0.14
42.00
0.14
0.00
0.14
43.00
0.14
0.00
0.14
44.00
0.14
0.00
0.14
45.00
0.13
0.00
0.13
46.00
0.13
0.00
0.13
47.00
0.13
0.00
0.13
48.00
0.13
0.00
0.13
49.00
0.13
0.00
0.13
50.00
0.13
0.00
0.13
51.00
0.13
0.00
0.13
52.00
0.12
0.00
0.12
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.12
0.00
0.12
54.00
0.12
0.00
0.12
55.00
0.12
0.00
0.12
56.00
0.12
0.00
0.12
57.00
0.12
0.00
0.12
58.00
0.12
0.00
0.12
59.00
0.11
0.00
0.11
60.00
0.11
0.00
0.11
61.00
0.11
0.00
0.11
62.00
0.11
0.00
0.11
63.00
0.11
0.00
0.11
64.00
0.11
0.00
0.11
65.00
0.10
0.00
0.10
66.00
0.10
0.00
0.10
67.00
0.10
0.00
0.10
68.00
0.10
0.00
0.10
69.00
0.10
0.00
0.10
70.00
0.09
0.00
0.09
71.00
0.09
0.00
0.09
72.00
0.09
0.00
0.09