SW3210803_Stormwater Report_20210810

v�NI�IQI��£�CREED
BELLE MAR RESIDENTIAL
MC # 07780-0013
CALCULATIONS FOR:
Stormwater and
Erosion Control
Measures
DATE. 05111121
REV: 08104121
8020 TOWER POINT DRIVE. CHARLOTTE, NORTH CAROLINA 28227
TEL [phone] FAX [phone] www.mckimcreed.com

TABLE OF CONTENTS
DESCRIPTION
PAGE
Cover
1
Table of Contents
2
Introduction
3
Drainage Areas and Curve Numbers
4
Time of Concentration
6
Impervious Calculations
8
Storm Drainage Chart (25-Year Storm)
9
HW/D Calculations (100-Year Storm)
10
Drop Inlet Calculations (100-Year Storm)
14
Anti -Flotation (Outlet Structures)
15
Rip -Rap Aprons
16
Diversion Ditches
17
On -Site Hydrology Output 19
Routing Diagram
1-year, 24-hour Storm Event
2-year, 24-hour Storm Event
10-year, 24-hour Storm Event
25-year, 24-hour Storm Event
50-year, 24-hour Storm Event
100-year, 24-hour Storm Event
Drainage Area Maps 128

PROJECT NO.: 07780-0013 BY: PMN ckam&CM��
DATE: 5/11/2021 T.M.: PMN
REVISED: 7/16/2021 P.M.: ►cJC SUMMARIES, DRAINAGE AREAS & CURVE NUMBERS
INTRODUCTION:
PROJECT SUMMARY
The proposed project is a 10 lot single family residential subdivision with that will be constructed on approximately 12 (+/-) acres of a 16
(+/-) acre parcel in Weddington, NC. The back side of the property contains a future NCDOT R/W, and therefore will not be included in
the development. The project site is located in the Catawba River Basin. The site will be accessed from Old Mill Road (SR-1392) with
a single entrance. The proposed area of disturbance consists of (+/-) 3 acres of grass field and wooded area. While this will ultimately
be a subdivision, only the roadway, permanent stormwater measures, and water line are being developed at this time. To the greatest
extent possible, disturbance has been limited to the roadway right of way and permanent pond. There is an existing pond on site that
will be retrofitted with a riser and outlet pipe to provide detention per the Town of Weddington regulations. Disturbance to the pond will
be limited to the installation of the outlet structure, emergency spillway, and slope inlet protection. There are jurisdictional wetlands
located on site that will be disturbed per the approved 4011404 permit. Disturbance to the jurisdictional features will be limited to the
greatest extent possible. The 4011404 permit is in progress.
STORMWATER TREATMENT SUMMARY
The site will be developed to meet low density design criteria as required by NCDEQ Post -Construction Storm water. Water detention
will be provided by installing a riser and outlet structure inside an existing pond on site. The outlet structure will be designed using the
pond's existing geometry to detain up to the 100-yr storm per Weddington regulations. Disturbance to the pond and surrounding
wetlands will be minimized as much as possible and limited to only what is needed to install the outlet structure, emergency spillway,
and slope inlet protection. Stormwater will be routed to the pond through vegetative swales. Part of the site will bypass the pond,
however the pond will over detain to account for this volume.
During construction, runoff will be minimized with the installation of a clean water ditch, which will result in site discharge points of less
than 1 acre. For this reason, all erosion control will be accomplished with silt fence and silt fence outlet devices. All pipe discharge
points will have rip -rap aprons.

.- - ,
+
MCKM4&CREED
PROJECT NO.: 07 880-0013 BY: PMN
DATE: 5/11/2021 T.M.: PMN
�l
REVISED: 7/16/2021 P.M.: KJC
SUMMARIES, DRAINAGE AREAS & CURVE NUMBERS
DRAINAGE AREAS: (see attached drainage area maps)
POI #1
Pre -developed Drainage Area=
7.86
acres
0.012
sq. miles
Post -developed Drainage Area= 7.86 acres
0.012
sq. miles
�r=7Pre-developed
Drainage Area=
4.26
acres
0.007
sq. miles
Post -developed Drainage Area= 4.26 acres
0.007
sq. miles
PRE -DEVELOPED CURVE NUMBERS:
Pre -developed CN
POI #1
Cover Type
Area (ft)
% SOIL GROUP CN
Wtd. CN
Woods (Good condition)
142360
41.58
B
55
22.87
Pasture/grassland (Good condition)
200020
58.42
B
61
35.64
Total
342380
11 58.51
Composite CN 58.51
Use CN =
59
Pre -developed CN
POI #2
CoverType
Area (ft)
% SOIL GROUP CN
Wtd. CN
Existing Roadway
6100
3.29
B
98
3.22
Pasture/grassland (Good condition)
179470
96.71
B
61
58.99
Total
185570
62.22
Composite CN 62.2=1
Use CN =
62

,
MNO.':077=80-0013
+
�e: M &CREED
PROJECT BY: PMN
DATE: 5/1//21/2021 T.M.: PMN
REVISED: 7/16/2021 P.M.: KJC
SUMMARIES, DRAINAGE AREAS & CURVE NUMBERS
POST -DEVELOPED CURVE NUMBERS:
Post -developed CN
POI #1
CoverType
Area (ft)
%
SOIL GROUP
CN
Wtd. CN
BUA in Private R/W
16550
4.83
B
98
4.74
BUA on Lots
56190
16.41
B
98
16.08
Woods Good Condition
6530
1.91
B
55
1.05
Grassed O en Space Good condition
263100
76.85
B
61
46.88
0.00
Total
342370
68.75
Composite CN 68.751
Use CN =
69
Post -developed CN
POI #2
Cover Type
Area (ft)
%
SOIL GROUP
CN
Wtd. CN
BUA in Private R/W
6970
3.76
B
98
3.68
BUA on Lots
28310
15.26
B
98
14.95
Grassed Open Space (Good condition)
150295
80.99
B
61
49.40
Total
185575
68.03
Composite CN 68.03
Use CN =
68

PROJECT NO. 07780-0013 BY: PMN &CREED
DATE: 06/11/21 T.M: PMN
REVISED: 07/16/21 P.M.: KJC TIME OF CONCENTRATION-il
PRE -DEVELOPMENT
POI #1
POI #2
Pre -development
Flow Phase One
Type: Sheet Flow
Length: 100 ft
"N" Value: 0.24 from tables
Slope: 0.04 ft/ft
Com uted 'T' 11 Minutes
Pre -development
Flow Phase Two
Type:
Shallow Concentrated Flow
Surface:
u
Length:
672 ft
u=unpaved
p=paved
Slope:
0.073 ft/ft
Velocity:
4.36 ft/sec
Com uted 'T':
2.67 Minutes
Pre -development Time of Concentration
Flow Summary Total T,= 13.6 Minutes
Pre -development
Flow Phase One
r Type: Sheet Flow
Length: 100 ft
"N" Value: 0.24 from tables
Slope: 0.05 ft/ft
Com uted 'T' 10 Minutes
Pre -development
Flow Phase Two
Type:
Shallow Concentrated Flow
Surface:
u
Length:
380 ft
u=unpaved
p=paved
Slope:
0.045 ft/ft
Velocity:
3.42 ft/sec
Com uted 'T':
1.86 Minutes
Pre -development T e: Open Channel Flow
Flow Phase Three Length: 386 ft
Velocit : 3 ft/sec assumed
Com uted 'T': 0.036 hr, or 2.2 Minutes
Pre -development Time of Concentration
Flow Summary Total T,= 14.0 Minutes
Ar

PROJECT NO. 07780-0013 BY: PMN &CREED
DATE: 06/11/21 T.M: PMN
REVISED: 07/16/21 P.M.: KJC TIME OF CONCENTRATION-il
POST -DEVELOPMENT
POI #1
POI #2
Post -development
Flow Phase One
Type: Sheet Flow
Length: 100 ft
"N" Value: 0.24 from tables
Slope: 0.04 ft/ft
Com uted 'T' 11 Minutes
Post -development
Flow Phase Two
Type:
Shallow Concentrated Flow
Surface:
u
Length:
170 ft
u=unpaved
p=paved
Slope:
0.14 ft/ft
Velocity:
6.04 ft/sec
Com uted 'T':
0.47 Minutes
Post -development r Type: Open Channel Flow
Flow Phase Three Length: 250 ft
Velocit : 2 ft/sec assumed
Com uted 'T': 0.036 hr, or 2.1 Minutes
Post -development I Time of Concentration 11
Flow Summary I I Total T,= 13.6 Minutes
Post -development
Flow Phase One
Type: Sheet Flow
Length: 100 ft
"N" Value: 0.24 from tables
Slope: 0.05 ft/ft
Com uted 'T' 10 Minutes
Post -development
Flow Phase Two
Type: Shallow Concentrated Flow
Surface: u
Length: 380 ft
u=unpaved
p=paved
Slope: 0.045 ft/ft
Velocity: 3.42 ft/sec
Com uted 'T': 1.86 Minutes
Post -development r Type: Open Channel Flow
Flow Phase Three Length: 386 ft
Velocit : 3 ft/sec assumed
Com uted 'T': 0.036 hr or 2.2 Minutes
Post -development I Time of Concentration 11
Flow Summary 11 Total T,= 14.0 Minutes
N

•
v,Mq<B4&CREED
PROJECT NO.: 07780-0013 BY: PMN
DATE: 6/11/2021 T.M.: PMN
REVISED: 8i4i2021 P.M.: KJc
IMPERVIOUS CALCULATIONS
POI #1
Drainage Area 7.86 acres
Impervious Area
In Private R/W (paving, driveways, etc.)=
16550 ft2
On lots (building, sidewalk, patios, drives, etc.)=
56190 ft2
Total Impervious=
72740 W
Total Pervious=
269630 ft2
Percent Impervious=
21.2%
POI #2
Drainage Area 4.26 acres
Impervious Area
In R/W (paving, curb, sidewalk, driveways, etc.)=
6970 ft2
On lots (building, sidewalk, patios, drives, etc.)=
28310 ft2
Total Impervious=
35280 W
Total Pervious=
150295 ft2
Percent Impervious=
19.0%
TOTAL PROJECT
Total Area: 12.12 acres
Impervious Area
Impervious Area POI #1
72740 ft2
Impervious Area POI #2
35280 ft2
Total Impervious Area=
108020 ft2
Total Pervious=
419925 ft2
Percent Impervious=
20.5%
ax
1
7530
2
7660
3
9365
4
9365
5
9365
6
9365
7
9365
8
9365
9
6520
10
6550

BELLE MAR RESIDENTIAL
BY: PMN
401,11
&CRF-FD
PROJECT NC 07780-0013
DATE: 05/11/21
T.M.: PMN
REVISED: 08/04/21
P.M.: KJC
25 YEAR STORM PIPE CALCULATIONS
MIN DRAINAGE 25 YEAR 25 YEAR TOTAL MAX
INVERT INVERT LENGTH' SLOPE DIA. PIPE MANNING COVER AREA RUNOFF I FLOW CAPACITY VELOC
STRUCTURE START STOP FT FT/FT IN TYPE n FT ACRES C IN/HR CFS CFS FPS
100 YEAR 100 YEA
I FLOW
IN/HR CFS
CULVERT 1
706.58
705.73
78
0.011
18
CLASS V RCP
0.013
1.00
4.33
0.35
8.34
12.64
13.00
7.11
9.38
14.2
CULVERT 2
694.80
694.50
60
0.005
18
CLASS 111 RCP
0.013
2.00
1.98
0.35
8.34
5.78
7.99
4.64
9.38
6.5
CULVERT 3
694.00
693.00
29
0.035
15
CLASS 111 RCP
0.013
2.00
2.21
0.35
8.34
6.45
13.00
10.01
9.38
7.3
CULVERT 4
687.43
687.25
18
0.010
18
CLASS 111 RCP
0.013
2.00
2.44
0.35
8.34
7.12
11.30
6.39
9.38
8.0
* Length does not includes length of FES

Culvert Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc.
Wednesday, Aug 4 2021
CULVERT #1
Invert Elev Dn (ft)
= 705.73
Calculations
Pipe Length (ft)
= 78.00
Qmin (cfs)
= 14.20
Slope (%)
= 1.10
Qmax (cfs)
= 14.20
Invert Elev Up (ft)
= 706.59
Tailwater Elev (ft)
= 0.00
Rise (in)
= 18.0
Shape
= Circular
Highlighted
Span (in)
= 18.0
Qtotal (cfs)
= 14.20
No. Barrels
= 1
Qpipe (cfs)
= 14.20
n-Value
= 0.013
Qovertop (cfs)
= 0.00
Culvert Type
= Circular Concrete
Veloc Dn (ft/s)
= 8.32
Culvert Entrance
= Groove end w/headwall (C)
Veloc Up (ft/s)
= 8.04
Coeff. K,M,c,Y,k
= 0.0018, 2, 0.0292, 0.74, 0.2
HGL Dn (ft)
= 707.12
HGL Up (ft)
= 708.52
Embankment
Hw Elev (ft)
= 709.58
Top Elevation (ft)
= 710.00
Hw/D (ft)
= 1.99
Top Width (ft)
= 44.00
Flow Regime
= Inlet Control
Crest Width (ft)
= 22.00
El. (R)
711.❑❑
710.00
709 ❑0
7❑3 ❑0
7❑7 ❑0
706 00
705 on
704 on
CULVERT41
10 20 30 40 50 E9 70 30 90 10❑ 110
Ci-1w Calvert HGL Embank
Hw Depth (R)
4.41
3.41
241
141
❑41
-059
-1 59
-2 59
12❑
Reach (R)
10

Culvert Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc.
Wednesday, Aug 4 2021
CULVERT #2
Invert Elev Dn (ft)
= 694.50
Calculations
Pipe Length (ft)
= 60.00
Qmin (cfs)
= 6.50
Slope (%)
= 0.50
Qmax (cfs)
= 6.50
Invert Elev Up (ft)
= 694.80
Tailwater Elev (ft)
= 0.00
Rise (in)
= 18.0
Shape
= Circular
Highlighted
Span (in)
= 18.0
Qtotal (cfs)
= 6.50
No. Barrels
= 1
Qpipe (cfs)
= 6.50
n-Value
= 0.013
Qovertop (cfs)
= 0.00
Culvert Type
= Circular Concrete
Veloc Dn (ft/s)
= 5.28
Culvert Entrance
= Groove end w/headwall (C)
Veloc Up (ft/s)
= 5.28
Coeff. K,M,c,Y,k
= 0.0018, 2, 0.0292, 0.74, 0.2
HGL Dn (ft)
= 695.49
HGL Up (ft)
= 695.79
Embankment
Hw Elev (ft)
= 696.24
Top Elevation (ft)
= 704.00
Hw/D (ft)
= 0.96
Top Width (ft)
= 18.00
Flow Regime
= Inlet Control
Crest Width (ft)
= 9.00
El. (R)
706.00
704.00
70200
700 M
693 00
696.❑0
694 00
692 00
CULVERT#2
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75
Ci-1w Calvert HGL Embank
Hw Depth (R)
11.20
9.20
7 211
620
3 20
1.20
11

Culvert Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Wednesday, Aug 4 2021
CULVERT #3
Invert Elev Dn (ft)
= 693.00
Calculations
Pipe Length (ft)
= 29.00
Qmin (cfs)
= 7.30
Slope (%)
= 3.45
Qmax (cfs)
= 7.30
Invert Elev Up (ft)
= 694.00
Tailwater Elev (ft)
= 0.00
Rise (in)
= 15.0
Shape
= Circular
Highlighted
Span (in)
= 15.0
Qtotal (cfs)
= 7.30
No. Barrels
= 1
Qpipe (cfs)
= 7.30
n-Value
= 0.013
Qovertop (cfs)
= 0.00
Culvert Type
= Circular Concrete
Veloc Dn (ft/s)
= 9.33
Culvert Entrance
= Groove end projecting (C)
Veloc Up (ft/s)
= 6.49
Coeff. K,M,c,Y,k
= 0.0045, 2, 0.0317, 0.69, 0.2
HGL Dn (ft)
= 693.76
HGL Up (ft)
= 695.08
Embankment
Hw Elev (ft)
= 695.96
Top Elevation (ft)
= 696.75
Hw/D (ft)
= 1.57
Top Width (ft)
= 20.00
Flow Regime
= Inlet Control
Crest Width (ft)
= 10.00
El. (R)
�7.❑❑
695.❑❑
695.❑❑
694.❑❑
M.❑❑
692 on
CULVERT43
5 10 15 20 25 30 35 40 45
Ci-1w C.1-11 HGL Embank
Hw Depth (R)
3.❑❑
2.❑❑
1.❑❑
❑.❑11
ADD
-2 on
5❑
Reach (R)
12

Culvert Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Wednesday, Aug 4 2021
CULVERT #4
Invert Elev Dn (ft)
= 687.25
Calculations
Pipe Length (ft)
= 18.00
Qmin (cfs)
= 8.00
Slope (%)
= 1.00
Qmax (cfs)
= 8.00
Invert Elev Up (ft)
= 687.43
Tailwater Elev (ft)
= 0.00
Rise (in)
= 18.0
Shape
= Circular
Highlighted
Span (in)
= 18.0
Qtotal (cfs)
= 8.00
No. Barrels
= 1
Qpipe (cfs)
= 8.00
n-Value
= 0.013
Qovertop (cfs)
= 0.00
Culvert Type
= Circular Concrete
Veloc Dn (ft/s)
= 5.79
Culvert Entrance
= Groove end w/headwall (C)
Veloc Up (ft/s)
= 5.77
Coeff. K,M,c,Y,k
= 0.0018, 2, 0.0292, 0.74, 0.2
HGL Dn (ft)
= 688.34
HGL Up (ft)
= 688.53
Embankment
Hw Elev (ft)
= 689.13
Top Elevation (ft)
= 693.00
Hw/D (ft)
= 1.13
Top Width (ft)
= 3.00
Flow Regime
= Inlet Control
Crest Width (ft)
= 1.50
13

M &CREED
PROJECT NO.: 07780-0013
BY: PMN
DATE: 05111121
T. M: PMN
REVISED: 08104121
P.M.: KJC
DROP INLET DEPTH CALCULATIONS - 100 YR STORM
100 Year Intensity (i) = 9.38 in/hr
Runoff Coefficient = 0.35
Time of Concentration= 5 min.
STANDARD DROP INLET w/ HORIZONTAL GRATE
Weir Eq.: Depth = [Surface Q/(3.3*P)]^(213)
P of Std Drop Inlet Grate = 6.94 ft.
Orifice Eq.: Depth = (Surface Q/(0.6*A*64.4A(1/2))]^2
Open Area of Std Drop Inlet Grate = 4.51 sq.ft.
Surface
Depth
Depth
EDroplet
Drainage
Flow to
Inlet Pipe
Outlet Pipe
w/ Weir
w/ Orifice
Required
Area (acres)
Inlet (cfs)
Size (in)
Size (in)
Equation (ft)
Equation (ft)
Depth (ft)
CULVERT #2
1.98
6.5
-
18
0.43
0.090
0.43
CULVERT #4
2.44
8.0
-
18
0.50
0.136
0.50
* based on NCDOT STD 840.18
14

BELLE MAR
RESIDENTIAL
`
PROJECT NO. 07780-0013 BY: PMN
�MCIdM&CREED
DATE: 05/11/21 T.M: PMN
REVISED: 07/16/21 P.M.: KJC FLOTATION CALCULATIONS
DESIGN CONSTRAINTS:
Weight of Concrete
Weight of Water
Safety Factor (S.F.)
Height of structure
Structure thickness
Outlet box width (interior)
Ws = (width + thickness x 4) x thickness x height x weight of concrete =
Ww = ((width + 2 x thickness )A2) x Weight of water x height =
Wb=(S.F.xWw)-Ws=
Required concrete = Wb / (Weight of concrete -weight of water) =
POND 1
Weight of outlet structure
12150
Ibs
Weight of water displaced
14040
Ibs
Size Base
5400
Ibs
Footing size
62
ft3
BALLAST PAD SIZING
POND 1
Length=
6.00
ft
Width=
6.00
ft
Thick=
2.04
ft
*Assume base is 6" wider than exterior box width and minimum thickness is 8".
W

•
Oo PROJECT NO.: o77ao 0021
DATE:T M : PMN
REVISED: 08/04/21P.M.: KJC_l RIPRAP APRON DESIGN (NCDENR METHOD)
i
Uu ,has ``Ir Do + Ly
AMC
2 "
B
a
50 LU
pl�h8il�e (fk}G)
Design of outlet protection from a round pipe flowing full, minimum tailwater condition Tw<0.6 diameter
OUTLET
Do(Pipe o)
(ft)
I Tw
(ft)
I Tom,<0.60
Q
(cfs)
V
(ft/s)
dso
(ft)
La
(ft)
Apron width
at outlet (ft)
Apron width
at pipe (ft)
Max Stone
0 (ft)
Apron
Thickness(ft)
Sides of Pipe
Stone Placement Height (ft)
CWD #2
1.00
0
OKAY
4.97
4.6
0.2
8
9
3
0.3
0.5
0.7
TDD 4 & 8 (EC STAGE 3)
1.00
0
OKAY
1.95
2.8
0.2
8
9
3
0.3
0.5
0.7
CULVERT #1
1.50
0
OKAY
12.64
7.1
0.3
10
12
4.5
0.5
0.8
1.0
CULVERT #2
1.50
0
OKAY
5.78
4.6
0.3
9
11
4.5
0.5
0.8
1.0
CULVERT #3
1.25
0
OKAY
6.45
10.0
0.2
8
9
3.75
0.3
0.5
0.8
CULVERT #4
1.50
0
OKAY
7.12
6.4
0.3
9
11
4.5
0.5
0.8
1.0
POND OUTLET
2.00
0
OKAY
13.81
5.8
0.4
13
15
6
0.6
0.9
1.3

4 -7 � � � � -7
`" N K M&CREED
TRAPEZOIDAL CHANNEL COMPUTATION SHEET
PROJECT: BELLE MAR RESIDENTIAL
LOCATION: WEDDINGTON, NC
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CWD #1
0.70
0.35
7.55
218.0
1.50
1.00
10.00
3
0.065
34.10
1.85
0.42
1.97
0.045
1.17
7
Straw with Net
✓
CWD #2A
1.51
0.35
7.55
4200.
1.50
1.00
10.00
3
0.025
59.10
3.99
0.46
3.61
0.020
0.58
6
Synthetic Mat
✓
CWD #2B
1.88
0.35
7.55
270.0
1.50
1.00
10.00
3
0.036
76.78
4.97
0.45
4.64
0.070
1.98
13
Synthetic Mat
✓
TD #1
0.20
0.60
7.55
210.0
1.50
0.00
9.00
3
0.036
49.65
0.91
0.33
2.70
0.050
1.04
7
Synthetic Mat
✓
TD #2
0.33
0.60
7.55
311.0
1.50
0.00
9.00
3
0.036
47.11
1.49
0.41
2.95
0.045
1.15
10
Synthetic Mat
✓
TD#3
0.13
0.60
7.55
98.0
1.50
0.00
9.00
3
0.065
10.29
0.59
0.51
0.75
0.007
0.22
1
Straw with Net
✓
TD #4
0.26
0.60
7.55
291.0
1.50
0.00
9.00
3
0.036
47.63
1.18
0.37
2.80
0.046
1.08
9
Synthetic Mat
✓
TD#5
0.14
0.60
7.55
2000.
1.50
0.00
9.00
3
0.065
26.95
0.63
0.37
1.56
0.048
1.10
7
Straw with Net
✓
TD #6
0.20
0.60
7.55
314.0
1.50
0.00
9.00
3
0.036
58.75
0.91
0.31
3.07
0.070
1.37
15
Synthetic Mat
✓
TD#7
0.09
0.60
7.55
112.0
1.50
0.00
9.00
3
0.065
32.07
0.41
0.29
1.60
0.068
1.24
6
Straw with Net
✓
TD#8
0.17
0.60
7.55
201.0
1.50
0.00
9.00
3
0.065
27.50
0.77
0.39
1.67
0.050
1.22
7
Straw with Net
✓
PD #1
0.91
0.45
7.55
210.0
1.50
0.00
9.00
3
0.036
49.65
3.09
0.53
3.67
0.050
1.65
7
Synthetic Mat
✓
PD #2
1.40
0.45
7.55
311.0
1.50
0.00
9.00
3
0.025
67.83
4.76
0.55
5.17
0.045
1.55
10
Synthetic Mat
✓
PD #3
0.58
0.45
7.55
98.0
1.50
0.00
9.00
3
0.033
20.27
1.97
0.63
1.68
0.007
0.27
1
Straw with Net
✓
PD #4
0.63
0.45
7.55
291.0
1.50
0.00
9.00
3
0.036
47.63
2.14
0.47
3.25
0.046
1.35
9
Synthetic Mat
✓
PD #5
0.14
0.60
7.55
200.0
1.50
0.00
9.00
3
0.065
26.95
0.63
0.37
1.56
0.048
1.10
7
Straw with Net
✓
PD #6
0.20
0.60
7.55
314.0
1.50
0.00
9.00
3
0.036
58.75
0.91
0.31
3.07
0.070
1.37
15
Synthetic Mat
✓
PD #7
0.09
0.60
7.55
112.0
1.50
0.00
9.00
3
0.065
32.07
0.41
0.29
1.60
0.068
1.24
6
Straw with Net
✓
PD #8
0.17
0.60
7.55
201.0
1.50
0.00
9.00
3
0.065
27.50
0.77
0.39
1.67
0.050
1.22
7
Straw with Net
✓
PD #9
2.46
0.50
7.55
40.0
1.50
1.00
10.00
3
0.036
22.48
9.29
1.04
2.18
0.006
0.39
1
Straw with Net
✓
PD#10
1.63
0.45
7.55
363.0
1.50
1.00
10.00
3
0.033
31.66
5.54
0.71
2.47
0.010
0.45
3
Straw with Net
✓
Wanning's values area based on channel lining and design flow depth as shown in NC DEN 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.
"'Assumed 18" check dam
17

VIIV I IM&CREED
TRAPEZOIDAL CHANNEL COMPUTATION SHEET
PROJECT: BELLE -MAR RESIDENTIAL
LOCATION: WEDDINGTON, NC
6
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PD#10
1.63
0.45
9.38
363.0
1.50
0.00
9.00
3
0.033
24.22
6.88
0.94
2.62
0.010
0.58
3
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.
18

1S (3S) 2S 4S
POI 1 POI #1 P I #2
Pre-Develo ment P A #2 Post-Dev lopment Post-D velopment
Pre-D velopment
1P
Pond
1L
2L
POI #3
Pre -Development POI #3
Post -Development
Subcat Reach on Link Routing Diagram for Belle Mar
Prepared by McKim & Creed, Printed 7/16/2021
EHyd,.:CAD@ 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC
iR

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: POI #1 Pre -Development
Runoff = 1.51 cfs @ 12.11 hrs, Volume= 0.183 af, Depth= 0.28"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 1-Year Rainfall=2.93"
Area (ac) CN Description
7.860 59 Woods/Grass
7.860 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
13.6 Direct Entry, User Input
Subcatchment 1S: POI #1 Pre -Development
Hydrograph
I I I I I I I I I I I I I I I I I I I I I I I ❑Runoff
s l l l l l l l l l l l l l l l l l l l l l l
type 1� 24,hr
-Near Raiinfallr2.93'�'
Ru'bbff Arta=7.860 at
Runpff'Vofu it =:0.'11$1 a -
Runoff De0h-0.28'�'
Tc1 ^13,6'Mih
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
Time (hours)
20

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 3
Hydrograph for Subcatchment 1S: POI #1 Pre -Development
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
0.59
13.00
2.26
0.10
0.34
14.00
2.40
0.13
0.22
15.00
2.50
0.15
0.19
16.00
2.58
0.17
0.15
17.00
2.64
0.19
0.14
18.00
2.70
0.21
0.12
19.00
2.75
0.22
0.11
20.00
2.79
0.23
0.10
21.00
2.83
0.25
0.09
22.00
2.86
0.26
0.09
23.00
2.90
0.27
0.09
24.00
2.93
0.28
0.08
25.00
2.93
0.28
0.00
26.00
2.93
0.28
0.00
27.00
2.93
0.28
0.00
28.00
2.93
0.28
0.00
29.00
2.93
0.28
0.00
30.00
2.93
0.28
0.00
31.00
2.93
0.28
0.00
32.00
2.93
0.28
0.00
33.00
2.93
0.28
0.00
34.00
2.93
0.28
0.00
35.00
2.93
0.28
0.00
36.00
2.93
0.28
0.00
37.00
2.93
0.28
0.00
38.00
2.93
0.28
0.00
39.00
2.93
0.28
0.00
40.00
2.93
0.28
0.00
41.00
2.93
0.28
0.00
42.00
2.93
0.28
0.00
43.00
2.93
0.28
0.00
44.00
2.93
0.28
0.00
45.00
2.93
0.28
0.00
46.00
2.93
0.28
0.00
47.00
2.93
0.28
0.00
48.00
2.93
0.28
0.00
49.00
2.93
0.28
0.00
50.00
2.93
0.28
0.00
51.00
2.93
0.28
0.00
52.00
2.93
0.28
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.93
0.28
0.00
54.00
2.93
0.28
0.00
55.00
2.93
0.28
0.00
56.00
2.93
0.28
0.00
57.00
2.93
0.28
0.00
58.00
2.93
0.28
0.00
59.00
2.93
0.28
0.00
60.00
2.93
0.28
0.00
`A

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 2S: POI #1 Post -Development
Runoff = 5.91 cfs @ 12.07 hrs, Volume= 0.414 af, Depth= 0.63"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 1-Year Rainfall=2.93"
Area (ac) CN Description
6.040 61 >75% Grass cover, Good, HSG B
0.150 55 Woods, Good, HSG B
1.290 98 BUA on Lots
0.380 98 BUA in Private R/W
7.860 69 Weighted Average
6.190 78.75% Pervious Area
1.670 21.25% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
13.6 Direct Entry, User Defined
Subcatchment 2S: POI #1 Post -Development
Hydrograph
I I I I I I I I I I I I I I I I I I I I I I I ❑Runoff
S I I I I I I I I I I I I I I I I I I I I I I
Type i� 24,hr
-- 1—Year-RaiinftHr2:93"
RuPbff Arba=7.869 ad
- -+-- - -- --+- un �ffoluim'
I Q I I I I � I I I
k6noff De�IpthrQ.93'''
T&13'6&Mih
�I
-T T- T T -T T- - -_T 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
Time (hours)
Olf

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 5
Hydrograph for Subcatchment 2S: POI #1 Post -Development
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
0.20
4.38
13.00
2.26
0.32
0.67
14.00
2.40
0.38
0.42
15.00
2.50
0.42
0.33
16.00
2.58
0.46
0.27
17.00
2.64
0.49
0.23
18.00
2.70
0.51
0.21
19.00
2.75
0.54
0.18
20.00
2.79
0.56
0.16
21.00
2.83
0.58
0.15
22.00
2.86
0.60
0.14
23.00
2.90
0.62
0.14
24.00
2.93
0.63
0.14
25.00
2.93
0.63
0.00
26.00
2.93
0.63
0.00
27.00
2.93
0.63
0.00
28.00
2.93
0.63
0.00
29.00
2.93
0.63
0.00
30.00
2.93
0.63
0.00
31.00
2.93
0.63
0.00
32.00
2.93
0.63
0.00
33.00
2.93
0.63
0.00
34.00
2.93
0.63
0.00
35.00
2.93
0.63
0.00
36.00
2.93
0.63
0.00
37.00
2.93
0.63
0.00
38.00
2.93
0.63
0.00
39.00
2.93
0.63
0.00
40.00
2.93
0.63
0.00
41.00
2.93
0.63
0.00
42.00
2.93
0.63
0.00
43.00
2.93
0.63
0.00
44.00
2.93
0.63
0.00
45.00
2.93
0.63
0.00
46.00
2.93
0.63
0.00
47.00
2.93
0.63
0.00
48.00
2.93
0.63
0.00
49.00
2.93
0.63
0.00
50.00
2.93
0.63
0.00
51.00
2.93
0.63
0.00
52.00
2.93
0.63
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.93
0.63
0.00
54.00
2.93
0.63
0.00
55.00
2.93
0.63
0.00
56.00
2.93
0.63
0.00
57.00
2.93
0.63
0.00
58.00
2.93
0.63
0.00
59.00
2.93
0.63
0.00
60.00
2.93
0.63
0.00
23

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 3S: POA #2 Pre -Development
Runoff = 1.38 cfs @ 12.10 hrs, Volume= 0.132 af, Depth= 0.37"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 1-Year Rainfall=2.93"
Area (ac) CN Description
4.120
61 Pasture/grassland/range, Good, HSG B
0.140
98 Existing R/W
4.260
62 Weighted Average
4.120
96.71 % Pervious Area
0.140
3.29% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
14.0 Direct Entry,
Subcatchment 3S: POA #2 Pre -Development
Hydrograph
I I I I I I I I I I I I I I I I I I I I I I I ❑Runoff
s l l l l l l l l l l l l l l l l l l l l l l
Type 0 24yhr
1-Year• Ralinfallr2.93"
Runoff ArA6a_=_4.260-ad-
RunpffVlol'luilmq='10.'11$2'I at
Runoff De�Ipthr0.377
T&14'60'Mih
N='16ir
Time (hours)
24

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 7
Hydrograph for Subcatchment 3S: POA #2 Pre -Development
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
0.08
0.71
13.00
2.26
0.15
0.24
14.00
2.40
0.19
0.15
15.00
2.50
0.22
0.12
16.00
2.58
0.24
0.10
17.00
2.64
0.27
0.09
18.00
2.70
0.29
0.08
19.00
2.75
0.30
0.07
20.00
2.79
0.32
0.06
21.00
2.83
0.33
0.06
22.00
2.86
0.34
0.06
23.00
2.90
0.36
0.06
24.00
2.93
0.37
0.05
25.00
2.93
0.37
0.00
26.00
2.93
0.37
0.00
27.00
2.93
0.37
0.00
28.00
2.93
0.37
0.00
29.00
2.93
0.37
0.00
30.00
2.93
0.37
0.00
31.00
2.93
0.37
0.00
32.00
2.93
0.37
0.00
33.00
2.93
0.37
0.00
34.00
2.93
0.37
0.00
35.00
2.93
0.37
0.00
36.00
2.93
0.37
0.00
37.00
2.93
0.37
0.00
38.00
2.93
0.37
0.00
39.00
2.93
0.37
0.00
40.00
2.93
0.37
0.00
41.00
2.93
0.37
0.00
42.00
2.93
0.37
0.00
43.00
2.93
0.37
0.00
44.00
2.93
0.37
0.00
45.00
2.93
0.37
0.00
46.00
2.93
0.37
0.00
47.00
2.93
0.37
0.00
48.00
2.93
0.37
0.00
49.00
2.93
0.37
0.00
50.00
2.93
0.37
0.00
51.00
2.93
0.37
0.00
52.00
2.93
0.37
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.93
0.37
0.00
54.00
2.93
0.37
0.00
55.00
2.93
0.37
0.00
56.00
2.93
0.37
0.00
57.00
2.93
0.37
0.00
58.00
2.93
0.37
0.00
59.00
2.93
0.37
0.00
60.00
2.93
0.37
0.00
`A

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 8
Summary for Subcatchment 4S: POI #2 Post -Development
Runoff = 2.87 cfs @ 12.08 hrs, Volume= 0.210 af, Depth= 0.59"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 1-Year Rainfall=2.93"
Area (ac) CN Description
0.650
98
BUA on Lots
0.160
98
BUA in Private R/W
3.450
61
>75% Grass cover, Good, HSG B
4.260
68
Weighted Average
3.450
80.99% Pervious Area
0.810
19.01 % Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
14.0 Direct Entry,
Subcatchment 4S: POI #2 Post -Development
Hydrograph
- '-� - -'� - -'�- - '� - I'� - -'�- -'� - '-� - -'� - -'�- - '� - I'� - -'�- -'� - '-� - I'� - -'�- -'� - I'� - -'� - -'� - '� - ■Runoff
I I I I I I I I I I I I I I I I I I I I I I
type 1� 24,hr
-Near Raiinfallr2.93'�'
Ru'�naf Araa=4.26'b ad
-----------------------------------------
Ru ngff I V''lol''lu ilmq='10.''210''1 o f
Runoff De�IpthrQ.597
1111
Tc^14'AMiih
- - -I - - - - - - - - - - - -I - - - - - I- T
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
Time (hours)
U:1

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 9
Hydrograph for Subcatchment 4S: POI #2 Post -Development
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
0.18
2.01
13.00
2.26
0.29
0.35
14.00
2.40
0.35
0.21
15.00
2.50
0.39
0.17
16.00
2.58
0.42
0.14
17.00
2.64
0.45
0.12
18.00
2.70
0.48
0.11
19.00
2.75
0.50
0.10
20.00
2.79
0.52
0.08
21.00
2.83
0.54
0.08
22.00
2.86
0.56
0.08
23.00
2.90
0.57
0.07
24.00
2.93
0.59
0.07
25.00
2.93
0.59
0.00
26.00
2.93
0.59
0.00
27.00
2.93
0.59
0.00
28.00
2.93
0.59
0.00
29.00
2.93
0.59
0.00
30.00
2.93
0.59
0.00
31.00
2.93
0.59
0.00
32.00
2.93
0.59
0.00
33.00
2.93
0.59
0.00
34.00
2.93
0.59
0.00
35.00
2.93
0.59
0.00
36.00
2.93
0.59
0.00
37.00
2.93
0.59
0.00
38.00
2.93
0.59
0.00
39.00
2.93
0.59
0.00
40.00
2.93
0.59
0.00
41.00
2.93
0.59
0.00
42.00
2.93
0.59
0.00
43.00
2.93
0.59
0.00
44.00
2.93
0.59
0.00
45.00
2.93
0.59
0.00
46.00
2.93
0.59
0.00
47.00
2.93
0.59
0.00
48.00
2.93
0.59
0.00
49.00
2.93
0.59
0.00
50.00
2.93
0.59
0.00
51.00
2.93
0.59
0.00
52.00
2.93
0.59
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
2.93
0.59
0.00
54.00
2.93
0.59
0.00
55.00
2.93
0.59
0.00
56.00
2.93
0.59
0.00
57.00
2.93
0.59
0.00
58.00
2.93
0.59
0.00
59.00
2.93
0.59
0.00
60.00
2.93
0.59
0.00
27

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 10
Summary for Pond 1 P: Pond
Inflow Area = 7.860 ac, 21.25% Impervious, Inflow Depth = 0.63" for 1-Year event
Inflow = 5.91 cfs @ 12.07 hrs, Volume= 0.414 of
Outflow = 0.66 cfs @ 13.03 hrs, Volume= 0.403 af, Atten= 89%, Lag= 57.2 min
Primary = 0.66 cfs @ 13.03 hrs, Volume= 0.403 of
Routing by Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Peak Elev= 684.54' @ 13.03 hrs Surf.Area= 13,385 sf Storage= 6,831 cf
Plug -Flow detention time= 302.2 min calculated for 0.403 of (97% of inflow)
Center -of -Mass det. time= 287.4 min ( 1,178.4 - 891.0 )
Volume Invert Avail.Storage Storage Description
#1 684.00' 68,318 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
684.00 11,957 0 0
685.00 14,605 13,281 13,281
686.00 17,025 15,815 29,096
687.00 19,271 18,148 47,244
688.00 22,876 21,074 68,318
Device Routing Invert Outlet Devices
#1 Primary 677.00' 24.0" Round Outfall
L= 90.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 677.00' / 676.55' S= 0.0050 '/' Cc= 0.900
n= 0.013, Flow Area= 3.14 sf
#2 Device 1 684.00' 3.0" Vert. Channel Protection Orifice C= 0.600
#3 Device 1 686.00' 48.0" x 48.0" Horiz. Top of Riser C= 0.600
Limited to weir flow at low heads
#4 Device 1 684.25' Volume Weir, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 0.50 0.50 1.75 1.75
Width (feet) 1.00 1.00 3.00 3.00 0.00
Primary OutFlow Max=0.66 cfs @ 13.03 hrs HW=684.54' (Free Discharge)
L1=Outfall (Passes 0.66 cfs of 38.11 cfs potential flow)
12=Channel Protection Orifice (Orifice Controls 0.15 cfs @ 3.10 fps)
3=Top of Riser ( Controls 0.00 cfs)
4=Volume Weir (Weir Controls 0.51 cfs @ 1.76 fps)
28

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 11
6
5
4
N
U
3
LL 3
2
1
688
687
w
w
0 686
w
w
Pond 1 P: Pond
Hydrograph
-1-1- 5.91 cfs------L--1------L-L-i------L- -1------L-L-i------
- 1 - 1--I--I--I
0.66 cfs
10101 wl IAreal=7.186d ad,
-------r-I---I--II -i1111
_i--P0a;'k;E1eW=g8 ;54'--
-I- -'---- - -' -------IStbra-#6'8,31 ef--
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
Time (hours)
685
684
PtVolume
Channel
Weir
Protection Orifice
0
5
10 15
Pond 1 P: Pond
Stage -Discharge
20 25 30 35 40 45
Discharge (cfs)
❑ Inflow
❑ Primary
❑ Primary

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 12
688
687
w
w
0 686
w
w
685
684
0
Pond 1 P: Pond
Stage -Area -Storage
Surface/Horizontal/Wetted Area (sq-ft)
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 22,000
10,000 20,000 30,000 40,000 50,000 60,000
Storage (cubic -feet)
Surface
❑ Storage
30

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 13
Hydrograph for Pond 1 P: Pond
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
0.00
0.00
0
684.00
0.00
2.00
0.00
0
684.00
0.00
4.00
0.00
0
684.00
0.00
6.00
0.00
0
684.00
0.00
8.00
0.00
0
684.00
0.00
10.00
0.00
0
684.00
0.00
12.00
4.38
1,249
684.10
0.02
14.00
0.42
6,444
684.51
0.58
16.00
0.27
5,414
684.43
0.39
18.00
0.21
4,760
684.38
0.28
20.00
0.16
4,330
684.35
0.21
22.00
0.14
4,026
684.32
0.17
24.00
0.14
3,862
684.31
0.15
26.00
0.00
3,119
684.25
0.09
28.00
0.00
2,566
684.21
0.07
30.00
0.00
2,134
684.18
0.05
32.00
0.00
1,804
684.15
0.04
34.00
0.00
1,550
684.13
0.03
36.00
0.00
1,352
684.11
0.02
38.00
0.00
1,194
684.10
0.02
40.00
0.00
1,065
684.09
0.02
42.00
0.00
962
684.08
0.01
44.00
0.00
874
684.07
0.01
46.00
0.00
799
684.07
0.01
48.00
0.00
734
684.06
0.01
50.00
0.00
677
684.06
0.01
52.00
0.00
628
684.05
0.01
54.00
0.00
585
684.05
0.01
56.00
0.00
548
684.05
0.00
58.00
0.00
516
684.04
0.00
60.00
0.00
488
684.04
0.00
165

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 14
Elevation Primary
(feet)
(cfs)
684.00
0.00
684.02
0.00
684.04
0.00
684.06
0.01
684.08
0.01
684.10
0.02
684.12
0.03
684.14
0.04
684.16
0.05
684.18
0.05
684.20
0.06
684.22
0.07
684.24
0.08
684.26
0.09
684.28
0.11
684.30
0.14
684.32
0.17
684.34
0.20
684.36
0.23
684.38
0.27
684.40
0.31
684.42
0.36
684.44
0.40
684.46
0.45
684.48
0.50
684.50
0.55
684.52
0.61
684.54
0.66
684.56
0.72
684.58
0.78
684.60
0.84
684.62
0.90
684.64
0.97
684.66
1.03
684.68
1.10
684.70
1.17
684.72
1.24
684.74
1.31
684.76
1.39
684.78
1.49
684.80
1.60
684.82
1.73
684.84
1.86
684.86
2.00
684.88
2.15
684.90
2.30
684.92
2.47
684.94
2.63
684.96
2.81
684.98
2.98
685.00
3.17
685.02
3.36
685.04
3.55
Stage -Discharge for Pond 1 P: Pond
Elevation Primary
(feet)
(cfs)
685.06
3.75
685.08
3.95
685.10
4.16
685.12
4.37
685.14
4.58
685.16
4.80
685.18
5.03
685.20
5.25
685.22
5.49
685.24
5.72
685.26
5.96
685.28
6.20
685.30
6.45
685.32
6.70
685.34
6.96
685.36
7.21
685.38
7.47
685.40
7.74
685.42
8.01
685.44
8.28
685.46
8.55
685.48
8.83
685.50
9.11
685.52
9.39
685.54
9.68
685.56
9.97
685.58
10.26
685.60
10.56
685.62
10.86
685.64
11.16
685.66
11.46
685.68
11.77
685.70
12.08
685.72
12.39
685.74
12.71
685.76
13.03
685.78
13.35
685.80
13.67
685.82
14.00
685.84
14.33
685.86
14.66
685.88
15.00
685.90
15.33
685.92
15.67
685.94
16.02
685.96
16.36
685.98
16.71
686.00
17.06
686.02
17.53
686.04
18.11
686.06
18.75
686.08
19.45
686.10
20.19
Elevation Primary
(feet)
(cfs)
686.12
20.98
686.14
21.81
686.16
22.67
686.18
23.57
686.20
24.50
686.22
25.46
686.24
26.45
686.26
27.47
686.28
28.51
686.30
29.58
686.32
30.68
686.34
31.80
686.36
32.95
686.38
34.12
686.40
35.31
686.42
36.53
686.44
37.77
686.46
39.03
686.48
40.30
686.50
41.61
686.52
42.93
686.54
44.01
686.56
44.07
686.58
44.12
686.60
44.18
686.62
44.23
686.64
44.29
686.66
44.34
686.68
44.40
686.70
44.45
686.72
44.51
686.74
44.56
686.76
44.61
686.78
44.67
686.80
44.72
686.82
44.78
686.84
44.83
686.86
44.89
686.88
44.94
686.90
44.99
686.92
45.05
686.94
45.10
686.96
45.15
686.98
45.21
687.00
45.26
687.02
45.32
687.04
45.37
687.06
45.42
687.08
45.48
687.10
45.53
687.12
45.58
687.14
45.64
687.16
45.69
Elevation Primary
(feet)
(cfs)
687.18
45.74
687.20
45.79
687.22
45.85
687.24
45.90
687.26
45.95
687.28
46.01
687.30
46.06
687.32
46.11
687.34
46.16
687.36
46.22
687.38
46.27
687.40
46.32
687.42
46.37
687.44
46.43
687.46
46.48
687.48
46.53
687.50
46.58
687.52
46.63
687.54
46.69
687.56
46.74
687.58
46.79
687.60
46.84
687.62
46.89
687.64
46.94
687.66
47.00
687.68
47.05
687.70
47.10
687.72
47.15
687.74
47.20
687.76
47.25
687.78
47.30
687.80
47.35
687.82
47.40
687.84
47.45
687.86
47.50
687.88
47.55
687.90
47.60
687.92
47.64
687.94
47.69
687.96
47.74
687.98
47.79
688.00
47.83
16YA

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 15
Stage -Area -Storage for Pond 1 P: Pond
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
684.00
11,957
0
684.05
12,089
601
684.10
12,222
1,209
684.15
12,354
1,823
684.20
12,487
2,444
684.25
12,619
3,072
684.30
12,751
3,706
684.35
12,884
4,347
684.40
13,016
4,995
684.45
13,149
5,649
684.50
13,281
6,310
684.55
13,413
6,977
684.60
13,546
7,651
684.65
13,678
8,331
684.70
13,811
9,019
684.75
13,943
9,713
684.80
14,075
10,413
684.85
14,208
11,120
684.90
14,340
11,834
684.95
14,473
12,554
685.00
14,605
13,281
685.05
14,726
14,014
685.10
14,847
14,754
685.15
14,968
15,499
685.20
15,089
16,250
685.25
15,210
17,008
685.30
15,331
17,771
685.35
15,452
18,541
685.40
15,573
19,317
685.45
15,694
20,098
685.50
15,815
20,886
685.55
15,936
21,680
685.60
16,057
22,480
685.65
16,178
23,285
685.70
16,299
24,097
685.75
16,420
24,915
685.80
16,541
25,739
685.85
16,662
26,569
685.90
16,783
27,406
685.95
16,904
28,248
686.00
17,025
29,096
686.05
17,137
29,950
686.10
17,250
30,810
686.15
17,362
31,675
686.20
17,474
32,546
686.25
17,587
33,422
686.30
17,699
34,305
686.35
17,811
35,192
686.40
17,923
36,086
686.45
18,036
36,985
686.50
18,148
37,889
686.55
18,260
38,799
686.60
18,373
39,715
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
686.65
18,485
40,637
686.70
18,597
41,564
686.75
18,710
42,496
686.80
18,822
43,435
686.85
18,934
44,379
686.90
19,046
45,328
686.95
19,159
46,283
687.00
19,271
47,244
687.05
19,451
48,212
687.10
19,632
49,189
687.15
19,812
50,175
687.20
19,992
51,170
687.25
20,172
52,174
687.30
20,352
53,188
687.35
20,533
54,210
687.40
20,713
55,241
687.45
20,893
56,281
687.50
21,074
57,330
687.55
21,254
58,388
687.60
21,434
59,456
687.65
21,614
60,532
687.70
21,795
61,617
687.75
21,975
62,711
687.80
22,155
63,814
687.85
22,335
64,927
687.90
22,515
66,048
687.95
22,696
67,178
688.00
22,876
68,318
33

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 16
Summary for Link 1 L: POI #3 Pre -Development
Inflow Area = 12.120 ac, 1.16% Impervious, Inflow Depth = 0.31" for 1-Year event
Inflow = 2.89 cfs @ 12.11 hrs, Volume= 0.315 of
Primary = 2.89 cfs @ 12.11 hrs, Volume= 0.315 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Link 1 L: POI #3 Pre -Development
Hydrograph
�---'--'I -'I - --'--'I -'I -'----------'----------'------'--FENnflow
- ❑ Primary
I''Inf lOw Arrep=112T124 �iq
I I I I I I I I I I I I I I I I I I I I I 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
Time (hours)
34

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 17
Hydrograph for Link 1 L: POI #3 Pre -Development
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
1.30
0.00
1.30
13.00
0.57
0.00
0.57
14.00
0.37
0.00
0.37
15.00
0.31
0.00
0.31
16.00
0.25
0.00
0.25
17.00
0.23
0.00
0.23
18.00
0.21
0.00
0.21
19.00
0.18
0.00
0.18
20.00
0.16
0.00
0.16
21.00
0.15
0.00
0.15
22.00
0.15
0.00
0.15
23.00
0.14
0.00
0.14
24.00
0.14
0.00
0.14
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
KV

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 18
Summary for Link 2L: POI #3 Post -Development
Inflow Area = 12.120 ac, 20.46% Impervious, Inflow Depth > 0.61" for 1-Year event
Inflow = 2.95 cfs @ 12.09 hrs, Volume= 0.613 of
Primary = 2.95 cfs @ 12.09 hrs, Volume= 0.613 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
3
2.95 cfs
I I I
2
y I I I
U I I I
p I I I
LL
-
T-T - -I-
-I
1 I I I I
Link 2L: POI #3 Post -Development
Hydrograph
■ Inflow
--1--1--L-1-L------L-L-L----'-- --
L------L- L- L----'-- ❑Primary
IInf lQw Arrep=1'12T1
-I _ -I- _ T _ T _ T _ _I _ _ - T - T - T _ _I T - T _ T - -I - - _ T _ T _ 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
Time (hours)

Belle Mar Type // 24-hr 1-Year Rainfall=2.93"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 19
Hydrograph for Link 2L: POI #3 Post -Development
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
2.03
0.00
2.03
13.00
1.01
0.00
1.01
14.00
0.80
0.00
0.80
15.00
0.64
0.00
0.64
16.00
0.52
0.00
0.52
17.00
0.44
0.00
0.44
18.00
0.39
0.00
0.39
19.00
0.34
0.00
0.34
20.00
0.30
0.00
0.30
21.00
0.27
0.00
0.27
22.00
0.25
0.00
0.25
23.00
0.24
0.00
0.24
24.00
0.22
0.00
0.22
25.00
0.11
0.00
0.11
26.00
0.09
0.00
0.09
27.00
0.08
0.00
0.08
28.00
0.07
0.00
0.07
29.00
0.06
0.00
0.06
30.00
0.05
0.00
0.05
31.00
0.05
0.00
0.05
32.00
0.04
0.00
0.04
33.00
0.04
0.00
0.04
34.00
0.03
0.00
0.03
35.00
0.03
0.00
0.03
36.00
0.02
0.00
0.02
37.00
0.02
0.00
0.02
38.00
0.02
0.00
0.02
39.00
0.02
0.00
0.02
40.00
0.02
0.00
0.02
41.00
0.01
0.00
0.01
42.00
0.01
0.00
0.01
43.00
0.01
0.00
0.01
44.00
0.01
0.00
0.01
45.00
0.01
0.00
0.01
46.00
0.01
0.00
0.01
47.00
0.01
0.00
0.01
48.00
0.01
0.00
0.01
49.00
0.01
0.00
0.01
50.00
0.01
0.00
0.01
51.00
0.01
0.00
0.01
52.00
0.01
0.00
0.01
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.01
0.00
0.01
54.00
0.01
0.00
0.01
55.00
0.01
0.00
0.01
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
37

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 20
Summary for Subcatchment 1S: POI #1 Pre -Development
Runoff = 3.84 cfs @ 12.09 hrs, Volume= 0.330 af, Depth= 0.50"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 2-Year Rainfall=3.53"
Area (ac) CN Description
7.860 59 Woods/Grass
7.860 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
13.6 Direct Entry, User Input
Subcatchment 1S: POI #1 Pre -Development
Hydrograph
-'-�--'--'--'� - I'�--'--'--'-�--'--'--'� - I'�--'--'--'-� - I'�--'--'� - I'�--'--'--'� - ■Runoff
s l l l l l l l l l l l l l l l l l l l l l l
typo 1� 24,hr
2-Year Raiinfellr3.53'�'
Ru'bbff Arba=7.860 ad
Ru npffV'''' 1 1o11uilmq=110.''13$0''I of
Rulnoff belpthrb..50"
Tc^13'�6�'Mih
- - -I - - I - - - - -1- - - - -I - - I - - - - - I - - - - - - 1- - - - -I - - I - I
/ONOON��Z�N�M,9NORIA
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
Time (hours)
38

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 21
Hydrograph for Subcatchment 1S: POI #1 Pre -Development
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
2.34
0.11
2.28
13.00
2.73
0.22
0.58
14.00
2.89
0.27
0.37
15.00
3.01
0.31
0.30
16.00
3.11
0.34
0.24
17.00
3.18
0.37
0.22
18.00
3.25
0.39
0.19
19.00
3.31
0.42
0.17
20.00
3.36
0.44
0.15
21.00
3.41
0.45
0.14
22.00
3.45
0.47
0.14
23.00
3.49
0.49
0.13
24.00
3.53
0.50
0.13
25.00
3.53
0.50
0.00
26.00
3.53
0.50
0.00
27.00
3.53
0.50
0.00
28.00
3.53
0.50
0.00
29.00
3.53
0.50
0.00
30.00
3.53
0.50
0.00
31.00
3.53
0.50
0.00
32.00
3.53
0.50
0.00
33.00
3.53
0.50
0.00
34.00
3.53
0.50
0.00
35.00
3.53
0.50
0.00
36.00
3.53
0.50
0.00
37.00
3.53
0.50
0.00
38.00
3.53
0.50
0.00
39.00
3.53
0.50
0.00
40.00
3.53
0.50
0.00
41.00
3.53
0.50
0.00
42.00
3.53
0.50
0.00
43.00
3.53
0.50
0.00
44.00
3.53
0.50
0.00
45.00
3.53
0.50
0.00
46.00
3.53
0.50
0.00
47.00
3.53
0.50
0.00
48.00
3.53
0.50
0.00
49.00
3.53
0.50
0.00
50.00
3.53
0.50
0.00
51.00
3.53
0.50
0.00
52.00
3.53
0.50
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.53
0.50
0.00
54.00
3.53
0.50
0.00
55.00
3.53
0.50
0.00
56.00
3.53
0.50
0.00
57.00
3.53
0.50
0.00
58.00
3.53
0.50
0.00
59.00
3.53
0.50
0.00
60.00
3.53
0.50
0.00
K

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 22
Summary for Subcatchment 2S: POI #1 Post -Development
Runoff = 9.73 cfs @ 12.07 hrs, Volume= 0.637 af, Depth= 0.97"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 2-Year Rainfall=3.53"
Area (ac) CN Description
6.040 61 >75% Grass cover, Good, HSG B
0.150 55 Woods, Good, HSG B
1.290 98 BUA on Lots
0.380 98 BUA in Private R/W
7.860 69 Weighted Average
6.190 78.75% Pervious Area
1.670 21.25% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
13.6 Direct Entry, User Defined
Subcatchment 2S: POI #1 Post -Development
Hydrograph
-�-�--�� 9.73cfs-�--I----�--I--I--�-�--I--�-�--I--��-�-�--I--r-�--I--��-�-�-
❑ Runoff
IIJ
9
8
7
w 6
0 5
LL
I
I I I I
4
3
2
1
I
I I I I
--ypQ
ar_Rainfall;=3_ 3." -
RtJnbff Arba=7.860 ad
-
'L-i- -' --1--' -i- -' �upOff-Vol'u_im�=0:16 71a Run -
-T- IT - - ! - - !-T-r- 1
Runoff Dopthr097'I'--
I N='16$
-r-rt--I--r-t--I--r-t-rt--I--r-t--I--r-t-y--r-r-�--I--r-t-y--
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
Time (hours)
Cfo]

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 23
Hydrograph for Subcatchment 2S: POI #1 Post -Development
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
2.34
0.35
7.71
13.00
2.73
0.53
0.98
14.00
2.89
0.61
0.60
15.00
3.01
0.68
0.47
16.00
3.11
0.73
0.38
17.00
3.18
0.77
0.33
18.00
3.25
0.81
0.29
19.00
3.31
0.84
0.26
20.00
3.36
0.87
0.22
21.00
3.41
0.90
0.21
22.00
3.45
0.92
0.20
23.00
3.49
0.95
0.19
24.00
3.53
0.97
0.19
25.00
3.53
0.97
0.00
26.00
3.53
0.97
0.00
27.00
3.53
0.97
0.00
28.00
3.53
0.97
0.00
29.00
3.53
0.97
0.00
30.00
3.53
0.97
0.00
31.00
3.53
0.97
0.00
32.00
3.53
0.97
0.00
33.00
3.53
0.97
0.00
34.00
3.53
0.97
0.00
35.00
3.53
0.97
0.00
36.00
3.53
0.97
0.00
37.00
3.53
0.97
0.00
38.00
3.53
0.97
0.00
39.00
3.53
0.97
0.00
40.00
3.53
0.97
0.00
41.00
3.53
0.97
0.00
42.00
3.53
0.97
0.00
43.00
3.53
0.97
0.00
44.00
3.53
0.97
0.00
45.00
3.53
0.97
0.00
46.00
3.53
0.97
0.00
47.00
3.53
0.97
0.00
48.00
3.53
0.97
0.00
49.00
3.53
0.97
0.00
50.00
3.53
0.97
0.00
51.00
3.53
0.97
0.00
52.00
3.53
0.97
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.53
0.97
0.00
54.00
3.53
0.97
0.00
55.00
3.53
0.97
0.00
56.00
3.53
0.97
0.00
57.00
3.53
0.97
0.00
58.00
3.53
0.97
0.00
59.00
3.53
0.97
0.00
60.00
3.53
0.97
0.00
to

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 24
Summary for Subcatchment 3S: POA #2 Pre -Development
Runoff = 2.90 cfs @ 12.09 hrs, Volume= 0.223 af, Depth= 0.63"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 2-Year Rainfall=3.53"
Area (ac) CN Description
4.120 61 Pasture/grassland/range, Good, HSG B
0.140 98 Existing R/W
4.260 62 Weighted Average
4.120 96.71 % Pervious Area
0.140 3.29% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
14.0 Direct Entry,
Subcatchment 3S: POA #2 Pre -Development
Hydrograph
I ■Runoff
S I I I I I I I I I I I I I I I I I I I I I I
Type 0 214yhr
IIIIII
2-YearRalinfaIIr3.53"
Ru�nbff Arba=4.26'�0 ad
-T r- T r- T- - -
gu1M11gff IoIIIu11 o=,O.1,2 311 a
Rulnoff DeIIIIpthrb.61TI
T&14,0Mir_yi)
�������������������WOMO�������
.�Time (hours)
W,

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 25
Hydrograph for Subcatchment 3S: POA #2 Pre -Development
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
2.34
0.17
1.91
13.00
2.73
0.29
0.38
14.00
2.89
0.36
0.24
15.00
3.01
0.40
0.19
16.00
3.11
0.44
0.15
17.00
3.18
0.47
0.14
18.00
3.25
0.50
0.12
19.00
3.31
0.53
0.11
20.00
3.36
0.55
0.09
21.00
3.41
0.57
0.09
22.00
3.45
0.59
0.08
23.00
3.49
0.61
0.08
24.00
3.53
0.63
0.08
25.00
3.53
0.63
0.00
26.00
3.53
0.63
0.00
27.00
3.53
0.63
0.00
28.00
3.53
0.63
0.00
29.00
3.53
0.63
0.00
30.00
3.53
0.63
0.00
31.00
3.53
0.63
0.00
32.00
3.53
0.63
0.00
33.00
3.53
0.63
0.00
34.00
3.53
0.63
0.00
35.00
3.53
0.63
0.00
36.00
3.53
0.63
0.00
37.00
3.53
0.63
0.00
38.00
3.53
0.63
0.00
39.00
3.53
0.63
0.00
40.00
3.53
0.63
0.00
41.00
3.53
0.63
0.00
42.00
3.53
0.63
0.00
43.00
3.53
0.63
0.00
44.00
3.53
0.63
0.00
45.00
3.53
0.63
0.00
46.00
3.53
0.63
0.00
47.00
3.53
0.63
0.00
48.00
3.53
0.63
0.00
49.00
3.53
0.63
0.00
50.00
3.53
0.63
0.00
51.00
3.53
0.63
0.00
52.00
3.53
0.63
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.53
0.63
0.00
54.00
3.53
0.63
0.00
55.00
3.53
0.63
0.00
56.00
3.53
0.63
0.00
57.00
3.53
0.63
0.00
58.00
3.53
0.63
0.00
59.00
3.53
0.63
0.00
60.00
3.53
0.63
0.00
43

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 26
Summary for Subcatchment 4S: POI #2 Post -Development
Runoff = 4.84 cfs @ 12.08 hrs, Volume= 0.326 af, Depth= 0.92"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 2-Year Rainfall=3.53"
Area (ac) CN
Description
0.650 98
BUA on Lots
0.160 98
BUA in Private R/W
3.450 61
>75% Grass cover, Good, HSG B
4.260 68
Weighted Average
3.450
80.99% Pervious Area
0.810
19.01 % Impervious Area
Tc Length
Slope Velocity Capacity Description
(min) (feet)
(ft/ft) (ft/sec) (cfs)
14.0
Direct Entry,
Subcatchment 4S: POI #2 Post -Development
Hydrograph
1 1 ■Runoff
s 1 1 1 1 71 1 1F 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
typo 1� 24,hr ROOff Arta=4.269 at
-1'I F u oIff'11 V1O I U In-q='0 3 6'11-a -
Runoff DepthrQ.91T'
Tc^4601Mih
L -I _ _I _ _ I_ _ L _ L _ _I _ _ I_ -I _ _I _ _ I_ _ L _ L _ _I _ _ I_ -I _ L _ -I- - L _ L - -I- -L - L
N=1'16p
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
Time (hours)
44

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 27
Hydrograph for Subcatchment 4S: POI #2 Post -Development
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
2.34
0.32
3.70
13.00
2.73
0.49
0.51
14.00
2.89
0.57
0.31
15.00
3.01
0.63
0.25
16.00
3.11
0.68
0.20
17.00
3.18
0.72
0.17
18.00
3.25
0.76
0.15
19.00
3.31
0.79
0.14
20.00
3.36
0.82
0.12
21.00
3.41
0.85
0.11
22.00
3.45
0.87
0.11
23.00
3.49
0.90
0.10
24.00
3.53
0.92
0.10
25.00
3.53
0.92
0.00
26.00
3.53
0.92
0.00
27.00
3.53
0.92
0.00
28.00
3.53
0.92
0.00
29.00
3.53
0.92
0.00
30.00
3.53
0.92
0.00
31.00
3.53
0.92
0.00
32.00
3.53
0.92
0.00
33.00
3.53
0.92
0.00
34.00
3.53
0.92
0.00
35.00
3.53
0.92
0.00
36.00
3.53
0.92
0.00
37.00
3.53
0.92
0.00
38.00
3.53
0.92
0.00
39.00
3.53
0.92
0.00
40.00
3.53
0.92
0.00
41.00
3.53
0.92
0.00
42.00
3.53
0.92
0.00
43.00
3.53
0.92
0.00
44.00
3.53
0.92
0.00
45.00
3.53
0.92
0.00
46.00
3.53
0.92
0.00
47.00
3.53
0.92
0.00
48.00
3.53
0.92
0.00
49.00
3.53
0.92
0.00
50.00
3.53
0.92
0.00
51.00
3.53
0.92
0.00
52.00
3.53
0.92
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
3.53
0.92
0.00
54.00
3.53
0.92
0.00
55.00
3.53
0.92
0.00
56.00
3.53
0.92
0.00
57.00
3.53
0.92
0.00
58.00
3.53
0.92
0.00
59.00
3.53
0.92
0.00
60.00
3.53
0.92
0.00
eR

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 28
Summary for Pond 1 P: Pond
Inflow Area = 7.860 ac, 21.25% Impervious, Inflow Depth = 0.97" for 2-Year event
Inflow = 9.73 cfs @ 12.07 hrs, Volume= 0.637 of
Outflow = 1.55 cfs @ 12.58 hrs, Volume= 0.625 af, Atten= 84%, Lag= 30.8 min
Primary = 1.55 cfs @ 12.58 hrs, Volume= 0.625 of
Routing by Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Peak Elev= 684.79' @ 12.58 hrs Surf.Area= 14,050 sf Storage= 10,277 cf
Plug -Flow detention time= 228.4 min calculated for 0.625 of (98% of inflow)
Center -of -Mass det. time= 218.3 min ( 1,094.1 - 875.8 )
Volume Invert Avail.Storage Storage Description
#1 684.00' 68,318 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
684.00 11,957 0 0
685.00 14,605 13,281 13,281
686.00 17,025 15,815 29,096
687.00 19,271 18,148 47,244
688.00 22,876 21,074 68,318
Device Routing Invert Outlet Devices
#1 Primary 677.00' 24.0" Round Outfall
L= 90.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 677.00' / 676.55' S= 0.0050 '/' Cc= 0.900
n= 0.013, Flow Area= 3.14 sf
#2 Device 1 684.00' 3.0" Vert. Channel Protection Orifice C= 0.600
#3 Device 1 686.00' 48.0" x 48.0" Horiz. Top of Riser C= 0.600
Limited to weir flow at low heads
#4 Device 1 684.25' Volume Weir, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 0.50 0.50 1.75 1.75
Width (feet) 1.00 1.00 3.00 3.00 0.00
Primary OutFlow Max=1.55 cfs @ 12.58 hrs HW=684.79' (Free Discharge)
L1=Outfall (Passes 1.55 cfs of 38.90 cfs potential flow)
12=Channel Protection Orifice (Orifice Controls 0.19 cfs @ 3.93 fps)
3=Top of Riser ( Controls 0.00 cfs)
4=Volume Weir (Weir Controls 1.35 cfs @ 2.18 fps)
e1:

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 29
Pond 1 P: Pond
Hydrograph
❑ Inflow
---r-r-----r-r-rt-----rn-r-7---Ip-'-Ir-r�J- p---[-�r-r-r- [I Primary
?oak EIe,v"Qq-84',79'--
- 1 - -'I- -'r - r - 7 - -'I - -'I- -'r - T - 1 - -'I- -'I- - 1 - T - 1 - -'I- -'I- - r - 1 - -'I - -'I- -'r - T -
- L - -'- - L - L - L - -' - -'- - L - L - L - -'- -'- - L - L - L - _I- -'- - L - L - -' - -'- - L - L -
- - - I'I - -'I- -'I- -'- - I'I - -'I -
688
687
w
w
0 686
w
w
685
684
PtVolume
Channel
Weir
Protection Orifice
0
5
10 15
//////%Time (hours)
Pond 1 P: Pond
Stage -Discharge
20 25 30 35 40 45
Discharge (cfs)
❑ Primary
47

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 30
688
687
w
w
0 686
w
w
685
684
0
Pond 1 P: Pond
Stage -Area -Storage
Surface/Horizontal/Wetted Area (sq-ft)
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 22,000
10,000 20,000 30,000 40,000 50,000 60,000
Storage (cubic -feet)
Surface
❑ Storage
48

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 31
Hydrograph for Pond 1 P: Pond
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
0.00
0.00
0
684.00
0.00
2.00
0.00
0
684.00
0.00
4.00
0.00
0
684.00
0.00
6.00
0.00
0
684.00
0.00
8.00
0.00
0
684.00
0.00
10.00
0.00
0
684.00
0.00
12.00
7.71
2,840
684.23
0.08
14.00
0.60
8,301
684.65
0.99
16.00
0.38
6,351
684.50
0.56
18.00
0.29
5,406
684.43
0.38
20.00
0.22
4,847
684.39
0.29
22.00
0.20
4,476
684.36
0.23
24.00
0.19
4,285
684.35
0.21
26.00
0.00
3,344
684.27
0.10
28.00
0.00
2,735
684.22
0.07
30.00
0.00
2,264
684.19
0.06
32.00
0.00
1,903
684.16
0.04
34.00
0.00
1,627
684.13
0.03
36.00
0.00
1,413
684.12
0.03
38.00
0.00
1,242
684.10
0.02
40.00
0.00
1,105
684.09
0.02
42.00
0.00
993
684.08
0.01
44.00
0.00
902
684.07
0.01
46.00
0.00
823
684.07
0.01
48.00
0.00
754
684.06
0.01
50.00
0.00
695
684.06
0.01
52.00
0.00
643
684.05
0.01
54.00
0.00
598
684.05
0.01
56.00
0.00
559
684.05
0.01
58.00
0.00
526
684.04
0.00
60.00
0.00
497
684.04
0.00
Elm

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 32
Elevation Primary
(feet)
(cfs)
684.00
0.00
684.02
0.00
684.04
0.00
684.06
0.01
684.08
0.01
684.10
0.02
684.12
0.03
684.14
0.04
684.16
0.05
684.18
0.05
684.20
0.06
684.22
0.07
684.24
0.08
684.26
0.09
684.28
0.11
684.30
0.14
684.32
0.17
684.34
0.20
684.36
0.23
684.38
0.27
684.40
0.31
684.42
0.36
684.44
0.40
684.46
0.45
684.48
0.50
684.50
0.55
684.52
0.61
684.54
0.66
684.56
0.72
684.58
0.78
684.60
0.84
684.62
0.90
684.64
0.97
684.66
1.03
684.68
1.10
684.70
1.17
684.72
1.24
684.74
1.31
684.76
1.39
684.78
1.49
684.80
1.60
684.82
1.73
684.84
1.86
684.86
2.00
684.88
2.15
684.90
2.30
684.92
2.47
684.94
2.63
684.96
2.81
684.98
2.98
685.00
3.17
685.02
3.36
685.04
3.55
Stage -Discharge for Pond 1 P: Pond
Elevation Primary
(feet)
(cfs)
685.06
3.75
685.08
3.95
685.10
4.16
685.12
4.37
685.14
4.58
685.16
4.80
685.18
5.03
685.20
5.25
685.22
5.49
685.24
5.72
685.26
5.96
685.28
6.20
685.30
6.45
685.32
6.70
685.34
6.96
685.36
7.21
685.38
7.47
685.40
7.74
685.42
8.01
685.44
8.28
685.46
8.55
685.48
8.83
685.50
9.11
685.52
9.39
685.54
9.68
685.56
9.97
685.58
10.26
685.60
10.56
685.62
10.86
685.64
11.16
685.66
11.46
685.68
11.77
685.70
12.08
685.72
12.39
685.74
12.71
685.76
13.03
685.78
13.35
685.80
13.67
685.82
14.00
685.84
14.33
685.86
14.66
685.88
15.00
685.90
15.33
685.92
15.67
685.94
16.02
685.96
16.36
685.98
16.71
686.00
17.06
686.02
17.53
686.04
18.11
686.06
18.75
686.08
19.45
686.10
20.19
Elevation Primary
(feet)
(cfs)
686.12
20.98
686.14
21.81
686.16
22.67
686.18
23.57
686.20
24.50
686.22
25.46
686.24
26.45
686.26
27.47
686.28
28.51
686.30
29.58
686.32
30.68
686.34
31.80
686.36
32.95
686.38
34.12
686.40
35.31
686.42
36.53
686.44
37.77
686.46
39.03
686.48
40.30
686.50
41.61
686.52
42.93
686.54
44.01
686.56
44.07
686.58
44.12
686.60
44.18
686.62
44.23
686.64
44.29
686.66
44.34
686.68
44.40
686.70
44.45
686.72
44.51
686.74
44.56
686.76
44.61
686.78
44.67
686.80
44.72
686.82
44.78
686.84
44.83
686.86
44.89
686.88
44.94
686.90
44.99
686.92
45.05
686.94
45.10
686.96
45.15
686.98
45.21
687.00
45.26
687.02
45.32
687.04
45.37
687.06
45.42
687.08
45.48
687.10
45.53
687.12
45.58
687.14
45.64
687.16
45.69
Elevation Primary
(feet)
(cfs)
687.18
45.74
687.20
45.79
687.22
45.85
687.24
45.90
687.26
45.95
687.28
46.01
687.30
46.06
687.32
46.11
687.34
46.16
687.36
46.22
687.38
46.27
687.40
46.32
687.42
46.37
687.44
46.43
687.46
46.48
687.48
46.53
687.50
46.58
687.52
46.63
687.54
46.69
687.56
46.74
687.58
46.79
687.60
46.84
687.62
46.89
687.64
46.94
687.66
47.00
687.68
47.05
687.70
47.10
687.72
47.15
687.74
47.20
687.76
47.25
687.78
47.30
687.80
47.35
687.82
47.40
687.84
47.45
687.86
47.50
687.88
47.55
687.90
47.60
687.92
47.64
687.94
47.69
687.96
47.74
687.98
47.79
688.00
47.83

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 33
Stage -Area -Storage for Pond 1 P: Pond
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
684.00
11,957
0
684.05
12,089
601
684.10
12,222
1,209
684.15
12,354
1,823
684.20
12,487
2,444
684.25
12,619
3,072
684.30
12,751
3,706
684.35
12,884
4,347
684.40
13,016
4,995
684.45
13,149
5,649
684.50
13,281
6,310
684.55
13,413
6,977
684.60
13,546
7,651
684.65
13,678
8,331
684.70
13,811
9,019
684.75
13,943
9,713
684.80
14,075
10,413
684.85
14,208
11,120
684.90
14,340
11,834
684.95
14,473
12,554
685.00
14,605
13,281
685.05
14,726
14,014
685.10
14,847
14,754
685.15
14,968
15,499
685.20
15,089
16,250
685.25
15,210
17,008
685.30
15,331
17,771
685.35
15,452
18,541
685.40
15,573
19,317
685.45
15,694
20,098
685.50
15,815
20,886
685.55
15,936
21,680
685.60
16,057
22,480
685.65
16,178
23,285
685.70
16,299
24,097
685.75
16,420
24,915
685.80
16,541
25,739
685.85
16,662
26,569
685.90
16,783
27,406
685.95
16,904
28,248
686.00
17,025
29,096
686.05
17,137
29,950
686.10
17,250
30,810
686.15
17,362
31,675
686.20
17,474
32,546
686.25
17,587
33,422
686.30
17,699
34,305
686.35
17,811
35,192
686.40
17,923
36,086
686.45
18,036
36,985
686.50
18,148
37,889
686.55
18,260
38,799
686.60
18,373
39,715
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
686.65
18,485
40,637
686.70
18,597
41,564
686.75
18,710
42,496
686.80
18,822
43,435
686.85
18,934
44,379
686.90
19,046
45,328
686.95
19,159
46,283
687.00
19,271
47,244
687.05
19,451
48,212
687.10
19,632
49,189
687.15
19,812
50,175
687.20
19,992
51,170
687.25
20,172
52,174
687.30
20,352
53,188
687.35
20,533
54,210
687.40
20,713
55,241
687.45
20,893
56,281
687.50
21,074
57,330
687.55
21,254
58,388
687.60
21,434
59,456
687.65
21,614
60,532
687.70
21,795
61,617
687.75
21,975
62,711
687.80
22,155
63,814
687.85
22,335
64,927
687.90
22,515
66,048
687.95
22,696
67,178
688.00
22,876
68,318
1.2

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 34
Summary for Link 1 L: POI #3 Pre -Development
Inflow Area = 12.120 ac, 1.16% Impervious, Inflow Depth = 0.55" for 2-Year event
Inflow = 6.74 cfs @ 12.09 hrs, Volume= 0.554 of
Primary = 6.74 cfs @ 12.09 hrs, Volume= 0.554 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
------6.74 cfs
-1-1--I--I-
5-
4-
0
LL I I I
3
2
Link 1 L: POI #3 Pre -Development
Hydrograph
-I--I--III -III ---I--II FEN nflow
I I I I I I I I I I -'--'�-'--I'--II -I'� -'�-'--I'- I'
❑ Primary
1'0f 1pw A '----=1'2T - �4--- --
I O���������������
.0
Time (hours)

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 35
Hydrograph for Link 1 L: POI #3 Pre -Development
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
4.20
0.00
4.20
13.00
0.96
0.00
0.96
14.00
0.60
0.00
0.60
15.00
0.49
0.00
0.49
16.00
0.40
0.00
0.40
17.00
0.35
0.00
0.35
18.00
0.32
0.00
0.32
19.00
0.28
0.00
0.28
20.00
0.24
0.00
0.24
21.00
0.23
0.00
0.23
22.00
0.22
0.00
0.22
23.00
0.21
0.00
0.21
24.00
0.21
0.00
0.21
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
53

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 36
Summary for Link 2L: POI #3 Post -Development
Inflow Area = 12.120 ac, 20.46% Impervious, Inflow Depth > 0.94" for 2-Year event
Inflow = 5.24 cfs @ 12.09 hrs, Volume= 0.951 of
Primary = 5.24 cfs @ 12.09 hrs, Volume= 0.951 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
- - 5.24 cfs
5
4 I I I I
y I I I
U I I I
3
o I I I
LL
2
1 I I I I
Link 2L: POI #3 Post -Development
Hydrograph
■ Inflow
❑ Primary
i T-fl4-i�r�e�=�1II2T'���--�� -
I I I I I I I I I I I I I I I I I I I 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
Time (hours)
54

Belle Mar Type 11 24-hr 2-Year Rainfall=3.53"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 37
Hydrograph for Link 2L: POI #3 Post -Development
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
3.77
0.00
3.77
13.00
1.89
0.00
1.89
14.00
1.30
0.00
1.30
15.00
0.97
0.00
0.97
16.00
0.76
0.00
0.76
17.00
0.63
0.00
0.63
18.00
0.54
0.00
0.54
19.00
0.47
0.00
0.47
20.00
0.41
0.00
0.41
21.00
0.37
0.00
0.37
22.00
0.34
0.00
0.34
23.00
0.32
0.00
0.32
24.00
0.31
0.00
0.31
25.00
0.15
0.00
0.15
26.00
0.10
0.00
0.10
27.00
0.08
0.00
0.08
28.00
0.07
0.00
0.07
29.00
0.07
0.00
0.07
30.00
0.06
0.00
0.06
31.00
0.05
0.00
0.05
32.00
0.04
0.00
0.04
33.00
0.04
0.00
0.04
34.00
0.03
0.00
0.03
35.00
0.03
0.00
0.03
36.00
0.03
0.00
0.03
37.00
0.02
0.00
0.02
38.00
0.02
0.00
0.02
39.00
0.02
0.00
0.02
40.00
0.02
0.00
0.02
41.00
0.02
0.00
0.02
42.00
0.01
0.00
0.01
43.00
0.01
0.00
0.01
44.00
0.01
0.00
0.01
45.00
0.01
0.00
0.01
46.00
0.01
0.00
0.01
47.00
0.01
0.00
0.01
48.00
0.01
0.00
0.01
49.00
0.01
0.00
0.01
50.00
0.01
0.00
0.01
51.00
0.01
0.00
0.01
52.00
0.01
0.00
0.01
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.01
0.00
0.01
54.00
0.01
0.00
0.01
55.00
0.01
0.00
0.01
56.00
0.01
0.00
0.01
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
tiST

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 38
Summary for Subcatchment 1S: POI #1 Pre -Development
Runoff = 13.06 cfs @ 12.07 hrs, Volume= 0.869 af, Depth= 1.33"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 10-Year Rainfall=5.16"
Area (ac) CN Description
7.860 59 Woods/Grass
7.860 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
13.6 Direct Entry, User Input
Subcatchment 1S: POI #1 Pre -Development
Hydrograph
--- -- - - --- - - -' --------=----'-- -- --'- -' --'--'-----'--'-
--------------- ■Runoff
1I I I I I I I I I I I I I I I I I I I I I I I
14 ' 13.06 cfs - ------ ------ - ---- - ---- - - ---- - ---- - - --
13 -7--1 F -T--1 -+-7--�--�-T------r-----r-T----+-r- -Typ�- - �Th -
12 1 1
- -_I--L -- --I_ ---------
�O-Nf'i a Ralftfa[FT5F.-
-------
11 I I I I I I I I I I I I I I I I I I I I I I I
-++-+ -+ -+ -+-+--RtjofII I +aI dI
--
10 ---- - ----------- - -- --7.860
----i- - -- - -'--'- - --'--
1-J----T_FuilpffVLoI''*q=O.8$9,af
-- ,IIIII IIIIIIIIIIIIIIIIIIIIIII
8 - -- +-- - + - - I Runaf# D ptK;:1.33'''- -
+-+--I--+-----+----I--I- -+- LL 7 - - -I- - I - __ _ __I__I _ __I__F _ ---TC 1VI
/A44
.,6Irhih--
6 I I I I I I I I I I I I I I I I
-1-J--1--1-J-L-1--1--L-1------L-J----L-_L _L-L-J----L-J- ii=1C -
5 1
4
3
-1-J--1--_L -L-1--1--'--L--'--'--L-1--'--L-L----L-L-J----L-L----L-1-J--
2
1 I I I I I I I I I I I I I I I I I I I I I 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
Time (hours)
61:1

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 39
Hydrograph for Subcatchment 1S: POI #1 Pre -Development
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
0.33
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
0.76
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.00
0.00
12.00
3.42
0.46
10.18
13.00
3.98
0.70
1.36
14.00
4.23
0.82
0.83
15.00
4.40
0.91
0.66
16.00
4.54
0.98
0.52
17.00
4.65
1.04
0.46
18.00
4.75
1.10
0.41
19.00
4.84
1.14
0.36
20.00
4.91
1.18
0.31
21.00
4.98
1.22
0.29
22.00
5.04
1.26
0.28
23.00
5.10
1.29
0.27
24.00
5.16
1.33
0.26
25.00
5.16
1.33
0.00
26.00
5.16
1.33
0.00
27.00
5.16
1.33
0.00
28.00
5.16
1.33
0.00
29.00
5.16
1.33
0.00
30.00
5.16
1.33
0.00
31.00
5.16
1.33
0.00
32.00
5.16
1.33
0.00
33.00
5.16
1.33
0.00
34.00
5.16
1.33
0.00
35.00
5.16
1.33
0.00
36.00
5.16
1.33
0.00
37.00
5.16
1.33
0.00
38.00
5.16
1.33
0.00
39.00
5.16
1.33
0.00
40.00
5.16
1.33
0.00
41.00
5.16
1.33
0.00
42.00
5.16
1.33
0.00
43.00
5.16
1.33
0.00
44.00
5.16
1.33
0.00
45.00
5.16
1.33
0.00
46.00
5.16
1.33
0.00
47.00
5.16
1.33
0.00
48.00
5.16
1.33
0.00
49.00
5.16
1.33
0.00
50.00
5.16
1.33
0.00
51.00
5.16
1.33
0.00
52.00
5.16
1.33
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.16
1.33
0.00
54.00
5.16
1.33
0.00
55.00
5.16
1.33
0.00
56.00
5.16
1.33
0.00
57.00
5.16
1.33
0.00
58.00
5.16
1.33
0.00
59.00
5.16
1.33
0.00
60.00
5.16
1.33
0.00
57

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 40
Summary for Subcatchment 2S: POI #1 Post -Development
Runoff = 21.92 cfs @ 12.06 hrs, Volume= 1.359 af, Depth= 2.07"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 10-Year Rainfall=5.16"
Area (ac) CN Description
6.040 61 >75% Grass cover, Good, HSG B
0.150 55 Woods, Good, HSG B
1.290 98 BUA on Lots
0.380 98 BUA in Private R/W
7.860 69 Weighted Average
6.190 78.75% Pervious Area
1.670 21.25% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
13.6 Direct Entry, User Defined
Subcatchment 2S: POI #1 Post -Development
Hydrograph
24
-L-L--'--L-
--1--L-L--I--'--L--'--I--L-1--I--L-L--'--L-L-L--I--L-
--'--L -L -L--
■Runoff
23
22
--'
21.92
--- - -----
cfs
----!
-;----;-;------;-;----;-;----;-;-;----;-;----;-;-;--
----'--!----'--!
-! --'--!
-!----'--! - np -
lh
21
-;-;--;-;-;
-;-;----;-;------;-;----;-;----;-;-;-'t-O-Z4
-y1'�`4 -
20
19
II_
--Nbaar_ Rad nfa IP"-& T6'�- -
18
17
-7-
-- -+-,
-
IIIIIIIIIIIIIIIIIIIIIII
-7----- +--
I
--- -r
-----r:ftrt_bff-Ardhe&T360TAId
-
15
-
----�--
- -��
-----�------�--
- --r
w w14
13
�
-
-I--++--I+I--+ 1- ++ -
; -m�2. �-+I_--
©--�d
12
-L-J----+-�;
-;-;---;
-L;-L;--'--'--L----'----'----L-
;-----;-;--
--'Wff
-
J- V-ri-hL---
LT�13--:LL
10
9
--'
-;-;----;-;
------'---'
-'---'
-+-;------;------;-;----;-;----+-;-;----;-+-
-------------'---'
----'---'
-------------'---'----'---'
�Y -
6
j
--T-
-- -+-
-
--T----- +-
-----r
- -T -
---r-T - --- -r----- r - - - - - -+- --
-
5
4
-L-J--'--L-
I
-Y-7----+-7
I I I
-L-L--'--'--L------L-L----L-L----L-L-L--'--L-
I I
-r-Y------?------r-T--I--r-Y--I--r-r-7----r-L----r-Y-7--
I I I I
I I I
I
----L-L-L--
I I I I I I I I I I I I I I
3
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
Time (hours)
58

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 41
Hydrograph for Subcatchment 2S: POI #1 Post -Development
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
0.33
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
0.76
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.02
0.26
12.00
3.42
0.91
18.58
13.00
3.98
1.26
1.89
14.00
4.23
1.42
1.12
15.00
4.40
1.54
0.88
16.00
4.54
1.63
0.69
17.00
4.65
1.71
0.60
18.00
4.75
1.78
0.54
19.00
4.84
1.84
0.47
20.00
4.91
1.89
0.40
21.00
4.98
1.94
0.37
22.00
5.04
1.99
0.36
23.00
5.10
2.03
0.35
24.00
5.16
2.07
0.33
25.00
5.16
2.07
0.00
26.00
5.16
2.07
0.00
27.00
5.16
2.07
0.00
28.00
5.16
2.07
0.00
29.00
5.16
2.07
0.00
30.00
5.16
2.07
0.00
31.00
5.16
2.07
0.00
32.00
5.16
2.07
0.00
33.00
5.16
2.07
0.00
34.00
5.16
2.07
0.00
35.00
5.16
2.07
0.00
36.00
5.16
2.07
0.00
37.00
5.16
2.07
0.00
38.00
5.16
2.07
0.00
39.00
5.16
2.07
0.00
40.00
5.16
2.07
0.00
41.00
5.16
2.07
0.00
42.00
5.16
2.07
0.00
43.00
5.16
2.07
0.00
44.00
5.16
2.07
0.00
45.00
5.16
2.07
0.00
46.00
5.16
2.07
0.00
47.00
5.16
2.07
0.00
48.00
5.16
2.07
0.00
49.00
5.16
2.07
0.00
50.00
5.16
2.07
0.00
51.00
5.16
2.07
0.00
52.00
5.16
2.07
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.16
2.07
0.00
54.00
5.16
2.07
0.00
55.00
5.16
2.07
0.00
56.00
5.16
2.07
0.00
57.00
5.16
2.07
0.00
58.00
5.16
2.07
0.00
59.00
5.16
2.07
0.00
60.00
5.16
2.07
0.00
ti

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 42
Summary for Subcatchment 3S: POA #2 Pre -Development
Runoff = 8.34 cfs @ 12.07 hrs, Volume= 0.546 af, Depth= 1.54"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 10-Year Rainfall=5.16"
Area (ac) CN Description
4.120
61 Pasture/grassland/range, Good, HSG B
0.140
98 Existing R/W
4.260
62 Weighted Average
4.120
96.71 % Pervious Area
0.140
3.29% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
14.0 Direct Entry,
Subcatchment 3S: POA #2 Pre -Development
Hydrograph
9 ■Runoff
8.34 cfs
yp 1 -24,h
-
---II- Rtindff Araa=4.2CI10-ad-
6 Ru n pff III VIIIO IIIIu Mq=IIO.IIS461II at
^-T--- -II--T -; -'r-T----'I--T-7----'I--T--I--I-------I--I--T---- I--------I--I--T-
5 I I I I I I I I I I I I I I I Runoff Dellpthr11I.64'�
3 '-+--II--II--}-�-'�-T--II--II--}-�--II--II--+--II--II--+-�--II--II--+-T`c^'�4��'I rriit�
0
a 4-
3
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
Time (hours)
60

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 43
Hydrograph for Subcatchment 3S: POA #2 Pre -Development
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
0.33
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
0.76
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.00
0.00
12.00
3.42
0.58
6.58
13.00
3.98
0.86
0.83
14.00
4.23
0.99
0.50
15.00
4.40
1.09
0.39
16.00
4.54
1.16
0.31
17.00
4.65
1.23
0.27
18.00
4.75
1.29
0.24
19.00
4.84
1.34
0.21
20.00
4.91
1.38
0.18
21.00
4.98
1.42
0.17
22.00
5.04
1.46
0.17
23.00
5.10
1.50
0.16
24.00
5.16
1.54
0.15
25.00
5.16
1.54
0.00
26.00
5.16
1.54
0.00
27.00
5.16
1.54
0.00
28.00
5.16
1.54
0.00
29.00
5.16
1.54
0.00
30.00
5.16
1.54
0.00
31.00
5.16
1.54
0.00
32.00
5.16
1.54
0.00
33.00
5.16
1.54
0.00
34.00
5.16
1.54
0.00
35.00
5.16
1.54
0.00
36.00
5.16
1.54
0.00
37.00
5.16
1.54
0.00
38.00
5.16
1.54
0.00
39.00
5.16
1.54
0.00
40.00
5.16
1.54
0.00
41.00
5.16
1.54
0.00
42.00
5.16
1.54
0.00
43.00
5.16
1.54
0.00
44.00
5.16
1.54
0.00
45.00
5.16
1.54
0.00
46.00
5.16
1.54
0.00
47.00
5.16
1.54
0.00
48.00
5.16
1.54
0.00
49.00
5.16
1.54
0.00
50.00
5.16
1.54
0.00
51.00
5.16
1.54
0.00
52.00
5.16
1.54
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.16
1.54
0.00
54.00
5.16
1.54
0.00
55.00
5.16
1.54
0.00
56.00
5.16
1.54
0.00
57.00
5.16
1.54
0.00
58.00
5.16
1.54
0.00
59.00
5.16
1.54
0.00
60.00
5.16
1.54
0.00

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 44
Summary for Subcatchment 4S: POI #2 Post -Development
Runoff = 11.22 cfs @ 12.07 hrs, Volume= 0.708 af, Depth= 1.99"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 10-Year Rainfall=5.16"
Area (ac) CN
Description
0.650 98
BUA on Lots
0.160 98
BUA in Private R/W
3.450 61
>75% Grass cover, Good, HSG B
4.260 68
Weighted Average
3.450
80.99% Pervious Area
0.810
19.01 % Impervious Area
Tc Length
Slope Velocity Capacity Description
(min) (feet)
(ft/ft) (ft/sec) (cfs)
14.0
Direct Entry,
Subcatchment 4S: POI #2 Post -Development
12 -+---- 11.22(
10
9
-r-r--1--t-r
8
H 7
0 6
LL-
5 I I I I I
4
3
2
1 I I I I
Hydrograph
--'�--'�--'� -'-�--'�--'�--'� --'�--'�--'� --'�--'�--'� -'�--'�--'�--'� --'�--'�--'� --'� --'�-- ■Runoff
Is-
Type 11 24,hr
�-7--1--i T--1--r r-7--1--r-T--1--F-r-�--r-r-7--1--F-7--1--
10-Nea1r Raiinfa ll:;5.16"
- r - T - -1- - I- - T - -I - - I- - r - 7 - -1- - r - T - -I- - r - r - r - -I- - r - r - -I- - r - T - T - -
RUnbff Araa=4.260 ad
-r-r--1--r-t--1--r-r-r--1--r-r--1--r-r-r--r-r-r--1--r-r-r--
-' -! - --+-- ---- -- � Off' ��o_,uimip=0:'1 08+aj -
- -+-- +-- -+-- - _+_Runaf#_Qeptk�rh99'''--
-' -------+----'------'---+--'--' - --Tc7-14'�r0' n1ih--
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
Time (hours)
62

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 45
Hydrograph for Subcatchment 4S: POI #2 Post -Development
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
0.33
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
0.76
0.00
0.00
10.00
0.93
0.00
0.00
11.00
1.21
0.01
0.11
12.00
3.42
0.86
9.28
13.00
3.98
1.19
1.00
14.00
4.23
1.35
0.59
15.00
4.40
1.47
0.46
16.00
4.54
1.56
0.37
17.00
4.65
1.64
0.32
18.00
4.75
1.71
0.29
19.00
4.84
1.77
0.25
20.00
4.91
1.82
0.21
21.00
4.98
1.86
0.20
22.00
5.04
1.91
0.19
23.00
5.10
1.95
0.18
24.00
5.16
1.99
0.18
25.00
5.16
1.99
0.00
26.00
5.16
1.99
0.00
27.00
5.16
1.99
0.00
28.00
5.16
1.99
0.00
29.00
5.16
1.99
0.00
30.00
5.16
1.99
0.00
31.00
5.16
1.99
0.00
32.00
5.16
1.99
0.00
33.00
5.16
1.99
0.00
34.00
5.16
1.99
0.00
35.00
5.16
1.99
0.00
36.00
5.16
1.99
0.00
37.00
5.16
1.99
0.00
38.00
5.16
1.99
0.00
39.00
5.16
1.99
0.00
40.00
5.16
1.99
0.00
41.00
5.16
1.99
0.00
42.00
5.16
1.99
0.00
43.00
5.16
1.99
0.00
44.00
5.16
1.99
0.00
45.00
5.16
1.99
0.00
46.00
5.16
1.99
0.00
47.00
5.16
1.99
0.00
48.00
5.16
1.99
0.00
49.00
5.16
1.99
0.00
50.00
5.16
1.99
0.00
51.00
5.16
1.99
0.00
52.00
5.16
1.99
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
5.16
1.99
0.00
54.00
5.16
1.99
0.00
55.00
5.16
1.99
0.00
56.00
5.16
1.99
0.00
57.00
5.16
1.99
0.00
58.00
5.16
1.99
0.00
59.00
5.16
1.99
0.00
60.00
5.16
1.99
0.00
63

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 46
Summary for Pond 1 P: Pond
Inflow Area = 7.860 ac, 21.25% Impervious, Inflow Depth = 2.07" for 10-Year event
Inflow = 21.92 cfs @ 12.06 hrs, Volume= 1.359 of
Outflow = 8.18 cfs @ 12.26 hrs, Volume= 1.347 af, Atten= 63%, Lag= 11.8 min
Primary = 8.18 cfs @ 12.26 hrs, Volume= 1.347 of
Routing by Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Peak Elev= 685.43' @ 12.26 hrs Surf.Area= 15,653 sf Storage= 19,831 cf
Plug -Flow detention time= 136.7 min calculated for 1.347 of (99% of inflow)
Center -of -Mass det. time= 131.6 min ( 983.8 - 852.2 )
Volume Invert Avail.Storage Storage Description
#1 684.00' 68,318 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
684.00 11,957 0 0
685.00 14,605 13,281 13,281
686.00 17,025 15,815 29,096
687.00 19,271 18,148 47,244
688.00 22,876 21,074 68,318
Device Routing Invert Outlet Devices
#1 Primary 677.00' 24.0" Round Outfall
L= 90.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 677.00' / 676.55' S= 0.0050 '/' Cc= 0.900
n= 0.013, Flow Area= 3.14 sf
#2 Device 1 684.00' 3.0" Vert. Channel Protection Orifice C= 0.600
#3 Device 1 686.00' 48.0" x 48.0" Horiz. Top of Riser C= 0.600
Limited to weir flow at low heads
#4 Device 1 684.25' Volume Weir, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 0.50 0.50 1.75 1.75
Width (feet) 1.00 1.00 3.00 3.00 0.00
Primary OutFlow Max=8.18 cfs @ 12.26 hrs HW=685.43' (Free Discharge)
L1=Outfall (Passes 8.18 cfs of 40.85 cfs potential flow)
12=Channel Protection Orifice (Orifice Controls 0.27 cfs @ 5.51 fps)
3=Top of Riser ( Controls 0.00 cfs)
4=Volume Weir (Weir Controls 7.91 cfs @ 3.10 fps)
64

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 47
'k=0 1 q. `1 A'1•7ii'.
Hydrograph
24
�i
��'��
-
-T-r--r
- -- ---
21.92 CfS
-r-
r 7
------ -
r r r
-------r-
T r
-------r- ------ -L-
r r r T r r r r 7 r r r r
elnflow
❑ Prima
Primary]
23
-+-
-T-
------ - ----
---- - -----T-T-
-r-
------ -
------T-T-
rrr pp-''II-_�QQ r-
�i QwTA�Y��ff
22
���-M+����-
21
20
-1-
-T-;----
----'---J--1--L-L-1--1----L-1-
- - ----
-T-
------ -T-;
------L-1-J------L-1----'--
-r-
-PoarkTE'iev��r85'�4r3' -
19
18
17
-1_L----'--
-T-,------
-1-L----'--
-J--1--L-L-L------L-1-
------r-r-4--1--1--r-T-,---
-J--1--L-L-L------L-1-L---
--'--'-
-1-----'--L -'--� - -1-
r- - ----y -
Ia71LJ��I�T-198311-14_
16
-r-r--i--r-
-r----r-r-r----
r-r-
r-r-
-----r-r-r-- --r-r-r----r-r-r-
15
-1-L'----'--
--'--'--'--'---'--'--'--1-1-L------L-1-L'---------------1-1-
w 14
-T-
----Ir- ---li--Ir-r-
--li--Ir-Ir-T-
--li--Ir-r-T-
--li--Ir-r---li--Ir-Ir-r-
13
3 12
-1-L----'--
-+-y
-J--1--L-L-L--'--'--L-1-L------L-1-J------L-L------L-1-
------ -y--
--Ir-t-rt------r-T-y------r-+-y----r-t-rt------r-+-
l
LL
10
9
-T-�
----
�--i--Ir-r-
8.18 cfs ---------------------------------------------------
8
-+-
----- - --I--
- -
----I-- -+-
----I--r-
-----I--r-----I-- - -
7
6
---------
-+-+-----
----------------------------------------------------
-+----+-+-+------+-+-+------+-+-+------+-+------+-+-
5
---------
---------------------------------------------------
4
-+-1--i--i-
----+-+-
------r-T-1------r-+-
----i--r-------+-+-
3
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
Time (hours)
688
687
w
w
0 686
w
w
685
684
PtVolume
Channel
Weir
Protection Orifice
0
5
10 15
Pond 1 P: Pond
Stage -Discharge
20 25 30 35 40 45
Discharge (cfs)
❑ Primary
MW

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 48
688
687
w
w
0 686
w
w
685
684
0
Pond 1 P: Pond
Stage -Area -Storage
Surface/Horizontal/Wetted Area (sq-ft)
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 22,000
10,000 20,000 30,000 40,000 50,000 60,000
Storage (cubic -feet)
Surface
❑ Storage
66

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 49
Hydrograph for Pond 1 P: Pond
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
0.00
0.00
0
684.00
0.00
2.00
0.00
0
684.00
0.00
4.00
0.00
0
684.00
0.00
6.00
0.00
0
684.00
0.00
8.00
0.00
0
684.00
0.00
10.00
0.00
0
684.00
0.00
12.00
18.58
9,583
684.74
1.31
14.00
1.12
10,522
684.81
1.65
16.00
0.69
8,104
684.63
0.95
18.00
0.54
6,826
684.54
0.66
20.00
0.40
6,039
684.48
0.50
22.00
0.36
5,524
684.44
0.41
24.00
0.33
5,275
684.42
0.36
26.00
0.00
3,783
684.31
0.15
28.00
0.00
3,018
684.25
0.08
30.00
0.00
2,486
684.20
0.07
32.00
0.00
2,072
684.17
0.05
34.00
0.00
1,757
684.14
0.04
36.00
0.00
1,514
684.12
0.03
38.00
0.00
1,324
684.11
0.02
40.00
0.00
1,170
684.10
0.02
42.00
0.00
1,046
684.09
0.02
44.00
0.00
946
684.08
0.01
46.00
0.00
861
684.07
0.01
48.00
0.00
787
684.07
0.01
50.00
0.00
724
684.06
0.01
52.00
0.00
668
684.06
0.01
54.00
0.00
620
684.05
0.01
56.00
0.00
578
684.05
0.01
58.00
0.00
542
684.05
0.00
60.00
0.00
511
684.04
0.00
67

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 50
Elevation Primary
(feet)
(cfs)
684.00
0.00
684.02
0.00
684.04
0.00
684.06
0.01
684.08
0.01
684.10
0.02
684.12
0.03
684.14
0.04
684.16
0.05
684.18
0.05
684.20
0.06
684.22
0.07
684.24
0.08
684.26
0.09
684.28
0.11
684.30
0.14
684.32
0.17
684.34
0.20
684.36
0.23
684.38
0.27
684.40
0.31
684.42
0.36
684.44
0.40
684.46
0.45
684.48
0.50
684.50
0.55
684.52
0.61
684.54
0.66
684.56
0.72
684.58
0.78
684.60
0.84
684.62
0.90
684.64
0.97
684.66
1.03
684.68
1.10
684.70
1.17
684.72
1.24
684.74
1.31
684.76
1.39
684.78
1.49
684.80
1.60
684.82
1.73
684.84
1.86
684.86
2.00
684.88
2.15
684.90
2.30
684.92
2.47
684.94
2.63
684.96
2.81
684.98
2.98
685.00
3.17
685.02
3.36
685.04
3.55
Stage -Discharge for Pond 1 P: Pond
Elevation Primary
(feet)
(cfs)
685.06
3.75
685.08
3.95
685.10
4.16
685.12
4.37
685.14
4.58
685.16
4.80
685.18
5.03
685.20
5.25
685.22
5.49
685.24
5.72
685.26
5.96
685.28
6.20
685.30
6.45
685.32
6.70
685.34
6.96
685.36
7.21
685.38
7.47
685.40
7.74
685.42
8.01
685.44
8.28
685.46
8.55
685.48
8.83
685.50
9.11
685.52
9.39
685.54
9.68
685.56
9.97
685.58
10.26
685.60
10.56
685.62
10.86
685.64
11.16
685.66
11.46
685.68
11.77
685.70
12.08
685.72
12.39
685.74
12.71
685.76
13.03
685.78
13.35
685.80
13.67
685.82
14.00
685.84
14.33
685.86
14.66
685.88
15.00
685.90
15.33
685.92
15.67
685.94
16.02
685.96
16.36
685.98
16.71
686.00
17.06
686.02
17.53
686.04
18.11
686.06
18.75
686.08
19.45
686.10
20.19
Elevation Primary
(feet)
(cfs)
686.12
20.98
686.14
21.81
686.16
22.67
686.18
23.57
686.20
24.50
686.22
25.46
686.24
26.45
686.26
27.47
686.28
28.51
686.30
29.58
686.32
30.68
686.34
31.80
686.36
32.95
686.38
34.12
686.40
35.31
686.42
36.53
686.44
37.77
686.46
39.03
686.48
40.30
686.50
41.61
686.52
42.93
686.54
44.01
686.56
44.07
686.58
44.12
686.60
44.18
686.62
44.23
686.64
44.29
686.66
44.34
686.68
44.40
686.70
44.45
686.72
44.51
686.74
44.56
686.76
44.61
686.78
44.67
686.80
44.72
686.82
44.78
686.84
44.83
686.86
44.89
686.88
44.94
686.90
44.99
686.92
45.05
686.94
45.10
686.96
45.15
686.98
45.21
687.00
45.26
687.02
45.32
687.04
45.37
687.06
45.42
687.08
45.48
687.10
45.53
687.12
45.58
687.14
45.64
687.16
45.69
Elevation Primary
(feet)
(cfs)
687.18
45.74
687.20
45.79
687.22
45.85
687.24
45.90
687.26
45.95
687.28
46.01
687.30
46.06
687.32
46.11
687.34
46.16
687.36
46.22
687.38
46.27
687.40
46.32
687.42
46.37
687.44
46.43
687.46
46.48
687.48
46.53
687.50
46.58
687.52
46.63
687.54
46.69
687.56
46.74
687.58
46.79
687.60
46.84
687.62
46.89
687.64
46.94
687.66
47.00
687.68
47.05
687.70
47.10
687.72
47.15
687.74
47.20
687.76
47.25
687.78
47.30
687.80
47.35
687.82
47.40
687.84
47.45
687.86
47.50
687.88
47.55
687.90
47.60
687.92
47.64
687.94
47.69
687.96
47.74
687.98
47.79
688.00
47.83
68

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 51
Stage -Area -Storage for Pond 1 P: Pond
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
684.00
11,957
0
684.05
12,089
601
684.10
12,222
1,209
684.15
12,354
1,823
684.20
12,487
2,444
684.25
12,619
3,072
684.30
12,751
3,706
684.35
12,884
4,347
684.40
13,016
4,995
684.45
13,149
5,649
684.50
13,281
6,310
684.55
13,413
6,977
684.60
13,546
7,651
684.65
13,678
8,331
684.70
13,811
9,019
684.75
13,943
9,713
684.80
14,075
10,413
684.85
14,208
11,120
684.90
14,340
11,834
684.95
14,473
12,554
685.00
14,605
13,281
685.05
14,726
14,014
685.10
14,847
14,754
685.15
14,968
15,499
685.20
15,089
16,250
685.25
15,210
17,008
685.30
15,331
17,771
685.35
15,452
18,541
685.40
15,573
19,317
685.45
15,694
20,098
685.50
15,815
20,886
685.55
15,936
21,680
685.60
16,057
22,480
685.65
16,178
23,285
685.70
16,299
24,097
685.75
16,420
24,915
685.80
16,541
25,739
685.85
16,662
26,569
685.90
16,783
27,406
685.95
16,904
28,248
686.00
17,025
29,096
686.05
17,137
29,950
686.10
17,250
30,810
686.15
17,362
31,675
686.20
17,474
32,546
686.25
17,587
33,422
686.30
17,699
34,305
686.35
17,811
35,192
686.40
17,923
36,086
686.45
18,036
36,985
686.50
18,148
37,889
686.55
18,260
38,799
686.60
18,373
39,715
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
686.65
18,485
40,637
686.70
18,597
41,564
686.75
18,710
42,496
686.80
18,822
43,435
686.85
18,934
44,379
686.90
19,046
45,328
686.95
19,159
46,283
687.00
19,271
47,244
687.05
19,451
48,212
687.10
19,632
49,189
687.15
19,812
50,175
687.20
19,992
51,170
687.25
20,172
52,174
687.30
20,352
53,188
687.35
20,533
54,210
687.40
20,713
55,241
687.45
20,893
56,281
687.50
21,074
57,330
687.55
21,254
58,388
687.60
21,434
59,456
687.65
21,614
60,532
687.70
21,795
61,617
687.75
21,975
62,711
687.80
22,155
63,814
687.85
22,335
64,927
687.90
22,515
66,048
687.95
22,696
67,178
688.00
22,876
68,318
MW

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 52
Summary for Link 1 L: POI #3 Pre -Development
Inflow Area = 12.120 ac, 1.16% Impervious, Inflow Depth = 1.40" for 10-Year event
Inflow = 21.39 cfs @ 12.07 hrs, Volume= 1.415 of
Primary = 21.39 cfs @ 12.07 hrs, Volume= 1.415 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
23
22
21
19
18
17
16
15
H 14
13
3 12
o 11
LL 10
Link 1 L: POI #3 Pre -Development
Hydrograph
-L-
--'--I--L-+-L--'-_L-L-L--'--I--L-L-
I
I I
--'--L-L-+-L--'--'--L-L--'--I--L-L-
I I I I
I I I I I I
I
■ Inflow
+-
+-+
----I--I-
-
-+-L----I'-
-+-r--I--I-
--
-T-1--1--1-
-
-
-L-L--'--'
-T-1----
-T-1--1--1i
-
--
21. 39
---I---
----'- -'-
- -----
-
--'--
-----II
-1--r-r-r--1--1--r-+-r--I--I--r-r-
+--1--r-+-+--1--1--r-+-
--------------------
----I--1I
-J--1--L-L-L--'--'--L-L-L------L-+-L------L-L------L-L-
-r--__r-r_r------r-+-r------r-Y-r----I--
-L--'--'--'---'--'--'--L-'---'--------------------------L-'---
-�--1--r-r-�--1--1--r-T-1--1--1--r-+-�--1--1--r-�--1--1--+-+-
----
----
--1-_r-r-
-J--1--L-L-L--'--'--L-L-L------L-1-L------L-L------L-L-
-1----Ir-r-7------Ir-T-1------r-T-1------r-7------Ir-r-
�--1--r-r-�--1--1--r-T-1--1--1--r-+-�--1--1--r-�--1--1--+-+-
---�--
- -'-
- - -
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-------1I
-
- - - --
- - -i --
r-+-
-
1
1,pW
---------I-
---I--1I -1I -
- -- - - -- -
---- - - -i --
I
-----1I - 1I -
--I--I- r-r--I--1--r-r-
S r+ 1 1
1 � 1 �'12 T �-
---------------I
----I--1I - 1I -----I--1I
r_rt__I__I__r_
-- -- - - -- --- - - -
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- G -
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- 1I -
r_
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r -r-
- 1I -
Primary
cfs
.0
Time (hours)
70

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 53
Hydrograph for Link 1 L: POI #3 Pre -Development
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
16.77
0.00
16.77
13.00
2.19
0.00
2.19
14.00
1.33
0.00
1.33
15.00
1.05
0.00
1.05
16.00
0.84
0.00
0.84
17.00
0.73
0.00
0.73
18.00
0.66
0.00
0.66
19.00
0.58
0.00
0.58
20.00
0.49
0.00
0.49
21.00
0.46
0.00
0.46
22.00
0.45
0.00
0.45
23.00
0.43
0.00
0.43
24.00
0.42
0.00
0.42
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
VA

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 54
Summary for Link 2L: POI #3 Post -Development
Inflow Area = 12.120 ac, 20.46% Impervious, Inflow Depth > 2.03" for 10-Year event
Inflow = 15.94 cfs @ 12.12 hrs, Volume= 2.055 of
Primary = 15.94 cfs @ 12.12 hrs, Volume= 2.055 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Link 2L: POI #3 Post -Development
Hydrograph
17
'�-
-T-
T
15.4cfs
---1r-r-7-
---
-rI -_I
----1r-T---1--i
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-
16
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15
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-+--1--r-+-+--1--1--r-+-+--1--r-r-+-+--1--r-r-+--1--1--r-+-
14
13
12
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1
11
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-
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1
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1 1
1 1 1 1
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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
Time (hours)
■ Inflow
❑ Primary
r`:

Belle Mar Type/1 24-hr 10-Year Rainfall=5.16"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 55
Hydrograph for Link 2L: POI #3 Post -Development
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
0.11
0.00
0.11
12.00
10.59
0.00
10.59
13.00
4.46
0.00
4.46
14.00
2.25
0.00
2.25
15.00
1.65
0.00
1.65
16.00
1.31
0.00
1.31
17.00
1.09
0.00
1.09
18.00
0.95
0.00
0.95
19.00
0.82
0.00
0.82
20.00
0.71
0.00
0.71
21.00
0.64
0.00
0.64
22.00
0.60
0.00
0.60
23.00
0.57
0.00
0.57
24.00
0.54
0.00
0.54
25.00
0.23
0.00
0.23
26.00
0.15
0.00
0.15
27.00
0.10
0.00
0.10
28.00
0.08
0.00
0.08
29.00
0.07
0.00
0.07
30.00
0.07
0.00
0.07
31.00
0.06
0.00
0.06
32.00
0.05
0.00
0.05
33.00
0.04
0.00
0.04
34.00
0.04
0.00
0.04
35.00
0.03
0.00
0.03
36.00
0.03
0.00
0.03
37.00
0.03
0.00
0.03
38.00
0.02
0.00
0.02
39.00
0.02
0.00
0.02
40.00
0.02
0.00
0.02
41.00
0.02
0.00
0.02
42.00
0.02
0.00
0.02
43.00
0.01
0.00
0.01
44.00
0.01
0.00
0.01
45.00
0.01
0.00
0.01
46.00
0.01
0.00
0.01
47.00
0.01
0.00
0.01
48.00
0.01
0.00
0.01
49.00
0.01
0.00
0.01
50.00
0.01
0.00
0.01
51.00
0.01
0.00
0.01
52.00
0.01
0.00
0.01
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.01
0.00
0.01
54.00
0.01
0.00
0.01
55.00
0.01
0.00
0.01
56.00
0.01
0.00
0.01
57.00
0.01
0.00
0.01
58.00
0.00
0.00
0.00
59.00
0.00
0.00
0.00
60.00
0.00
0.00
0.00
73

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 56
Summary for Subcatchment 1S: POI #1 Pre -Development
Runoff = 19.86 cfs @ 12.07 hrs, Volume= 1.268 af, Depth= 1.94"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 25-Year Rainfall=6.15"
Area (ac) CN Description
7.860 59 Woods/Grass
7.860 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
13.6 Direct Entry, User Input
Subcatchment 1S: POI #1 Pre -Development
Hydrograph
-1-J--I--1-�--1--L-1--1--I--1--I--I--L-1--I--L-1--I--�-�-�--I--L-1--I--L-1-J--
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-
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, I I I I I I I I I I I I 'I 'I I
15-+-+----+-+ -+-+--I--I--+--I--I--+-+--I--+-+-A---+-r+-+--I--++-+--I--+Q+-+--
14-rt-y--Ir-+-y-Ir-rt----Ir-+----Ir-r-rt--Ii-' T�rfflr-Iv�i�Y� •Ii�`�
13 I I I I I -I-- �I--I--I-- 1,-- �I--I--I-- i------ I ---I---- I--------- i----
-- _i__I__i_i_iIp * I Ie I
12
unoff
47-
LL 10-r-r----t-r-r-r--____t______r_r----r-Y----r-r-r-��I���V�VrI�__
i
9
----------- --------------------------------------------N='-
7-+-+----+-+ -+-+--I--I--+--I--I--+-+--I--+-+--I--+-+-+--I--+-+--I--+-+-+--
6-r-r--r-r-r -r-r--I--r-r--I--I--r-r--I--r-r--I--r-r-r--I--r-r--I--r-r-r--
5--11--
4 - ----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 I I I I I I I I I I
3-+-+----+-+ -+-+--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 I I I I I I I I I I
2 -r-r--r-+ -r--r-+----r-r-r----r-+----r-r-r--r-r-r----r-+-r--
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
Time (hours)
■ Runoff
74

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 57
Hydrograph for Subcatchment 1S: POI #1 Pre -Development
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
0.14
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.30
0.00
0.00
5.00
0.39
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.61
0.00
0.00
8.00
0.74
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.00
0.00
11.00
1.45
0.00
0.00
12.00
4.08
0.75
16.19
13.00
4.75
1.09
1.89
14.00
5.04
1.26
1.14
15.00
5.25
1.38
0.90
16.00
5.41
1.47
0.71
17.00
5.55
1.56
0.62
18.00
5.66
1.63
0.56
19.00
5.77
1.69
0.49
20.00
5.85
1.75
0.41
21.00
5.93
1.80
0.39
22.00
6.01
1.84
0.38
23.00
6.08
1.89
0.36
24.00
6.15
1.94
0.35
25.00
6.15
1.94
0.00
26.00
6.15
1.94
0.00
27.00
6.15
1.94
0.00
28.00
6.15
1.94
0.00
29.00
6.15
1.94
0.00
30.00
6.15
1.94
0.00
31.00
6.15
1.94
0.00
32.00
6.15
1.94
0.00
33.00
6.15
1.94
0.00
34.00
6.15
1.94
0.00
35.00
6.15
1.94
0.00
36.00
6.15
1.94
0.00
37.00
6.15
1.94
0.00
38.00
6.15
1.94
0.00
39.00
6.15
1.94
0.00
40.00
6.15
1.94
0.00
41.00
6.15
1.94
0.00
42.00
6.15
1.94
0.00
43.00
6.15
1.94
0.00
44.00
6.15
1.94
0.00
45.00
6.15
1.94
0.00
46.00
6.15
1.94
0.00
47.00
6.15
1.94
0.00
48.00
6.15
1.94
0.00
49.00
6.15
1.94
0.00
50.00
6.15
1.94
0.00
51.00
6.15
1.94
0.00
52.00
6.15
1.94
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.15
1.94
0.00
54.00
6.15
1.94
0.00
55.00
6.15
1.94
0.00
56.00
6.15
1.94
0.00
57.00
6.15
1.94
0.00
58.00
6.15
1.94
0.00
59.00
6.15
1.94
0.00
60.00
6.15
1.94
0.00
VS.

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 58
Summary for Subcatchment 2S: POI #1 Post -Development
Runoff = 30.15 cfs @ 12.06 hrs, Volume= 1.854 af, Depth= 2.83"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 25-Year Rainfall=6.15"
Area (ac) CN Description
6.040 61 >75% Grass cover, Good, HSG B
0.150 55 Woods, Good, HSG B
1.290 98 BUA on Lots
0.380 98 BUA in Private R/W
7.860 69 Weighted Average
6.190 78.75% Pervious Area
1.670 21.25% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
13.6 Direct Entry, User Defined
Subcatchment 2S: POI #1 Post -Development
Hydrograph
-T-7----T-,----Ir-T------T------T-7----r-T----Ir-T-7----r-7----Ir-T-7-- ■Runoff
-+-�-- 30.15 cfs-�--II--II--�--II--II--�-�--II--�-�--II--�+-�-�--II--�-�--II--I+-�-�--
30
28
26
24
22
20
N
-r-r--I--t-r
V 18
0 16
LL
14
-r-r--I--r-�
12
10
8
6
-III
----I-- -I
2
-
25- ear Rain arCr6A5"-
r-+------+------+-+--I--- +- -I- -r - r-+ - -I- - r- + - -I- -r -+-+--
RU rtbff-Ar66 = 7 86'0 ad- -
- I- - '�I - -I- -I- - '�I - -I - -I- -
-
r-r----r-t----r-r-r----r-r----r-r-
r
-
-r-r-r--I--r-r-r--
-' -----'------'-- - --'-- --Runoff_Qorpthr2,83.7
-r-r-r--r-r--I--r-r-r-r--r-r-r--r-r-r--Ir-r--/.��r�rA� _
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
Time (hours)
rcy

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 59
Hydrograph for Subcatchment 2S: POI #1 Post -Development
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
0.14
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.30
0.00
0.00
5.00
0.39
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.61
0.00
0.00
8.00
0.74
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.01
0.13
11.00
1.45
0.06
0.55
12.00
4.08
1.32
25.99
13.00
4.75
1.78
2.47
14.00
5.04
1.99
1.46
15.00
5.25
2.14
1.13
16.00
5.41
2.26
0.89
17.00
5.55
2.36
0.78
18.00
5.66
2.45
0.69
19.00
5.77
2.53
0.60
20.00
5.85
2.60
0.51
21.00
5.93
2.66
0.48
22.00
6.01
2.72
0.46
23.00
6.08
2.78
0.44
24.00
6.15
2.83
0.43
25.00
6.15
2.83
0.00
26.00
6.15
2.83
0.00
27.00
6.15
2.83
0.00
28.00
6.15
2.83
0.00
29.00
6.15
2.83
0.00
30.00
6.15
2.83
0.00
31.00
6.15
2.83
0.00
32.00
6.15
2.83
0.00
33.00
6.15
2.83
0.00
34.00
6.15
2.83
0.00
35.00
6.15
2.83
0.00
36.00
6.15
2.83
0.00
37.00
6.15
2.83
0.00
38.00
6.15
2.83
0.00
39.00
6.15
2.83
0.00
40.00
6.15
2.83
0.00
41.00
6.15
2.83
0.00
42.00
6.15
2.83
0.00
43.00
6.15
2.83
0.00
44.00
6.15
2.83
0.00
45.00
6.15
2.83
0.00
46.00
6.15
2.83
0.00
47.00
6.15
2.83
0.00
48.00
6.15
2.83
0.00
49.00
6.15
2.83
0.00
50.00
6.15
2.83
0.00
51.00
6.15
2.83
0.00
52.00
6.15
2.83
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.15
2.83
0.00
54.00
6.15
2.83
0.00
55.00
6.15
2.83
0.00
56.00
6.15
2.83
0.00
57.00
6.15
2.83
0.00
58.00
6.15
2.83
0.00
59.00
6.15
2.83
0.00
60.00
6.15
2.83
0.00
77

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 60
Summary for Subcatchment 3S: POA #2 Pre -Development
Runoff = 12.23 cfs @ 12.07 hrs, Volume= 0.779 af, Depth= 2.19"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 25-Year Rainfall=6.15"
Area (ac) CN Description
4.120 61 Pasture/grassland/range, Good, HSG B
0.140 98 Existing R/W
4.260 62 Weighted Average
4.120 96.71 % Pervious Area
0.140 3.29% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
14.0 Direct Entry,
Subcatchment 3S: POA #2 Pre -Development
Hydrograph
T - T - -'r - T - T - -'1- -'r - T - -'1- -'r - T - -'1 - -'F - T - T - -'1- - T - T - -'1 - -'F - T - T - -'F - T - T - -'1 - -'F - T - - - ■Runoff
12.23 cfs
12
-
----'-- +
10
9
8
N
7
o-+--,--,
-+-,
a 6
5
4
3
2
1
-- - -- - - - - - rtypp_I._24yhr
25-Year_ RanirtfalLr6.157 -
- -------+------ - ---- rE�#f-ArdA--4.250 ad-
-'r 7--' T-- r-7----7-Ru-noff-DapthrZ.19,F-
T& 14.-0'r rh i ri -
r-+----I-- T----I-- r- 7--I-- r-+--I--r - r- r--I-- r- r--I--r - T- r--
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
Time (hours)
78

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 61
Hydrograph for Subcatchment 3S: POA #2 Pre -Development
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
0.14
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.30
0.00
0.00
5.00
0.39
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.61
0.00
0.00
8.00
0.74
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.00
0.00
11.00
1.45
0.01
0.07
12.00
4.08
0.91
9.99
13.00
4.75
1.29
1.13
14.00
5.04
1.46
0.67
15.00
5.25
1.59
0.53
16.00
5.41
1.70
0.42
17.00
5.55
1.79
0.36
18.00
5.66
1.86
0.32
19.00
5.77
1.93
0.28
20.00
5.85
1.99
0.24
21.00
5.93
2.04
0.23
22.00
6.01
2.10
0.22
23.00
6.08
2.15
0.21
24.00
6.15
2.19
0.20
25.00
6.15
2.19
0.00
26.00
6.15
2.19
0.00
27.00
6.15
2.19
0.00
28.00
6.15
2.19
0.00
29.00
6.15
2.19
0.00
30.00
6.15
2.19
0.00
31.00
6.15
2.19
0.00
32.00
6.15
2.19
0.00
33.00
6.15
2.19
0.00
34.00
6.15
2.19
0.00
35.00
6.15
2.19
0.00
36.00
6.15
2.19
0.00
37.00
6.15
2.19
0.00
38.00
6.15
2.19
0.00
39.00
6.15
2.19
0.00
40.00
6.15
2.19
0.00
41.00
6.15
2.19
0.00
42.00
6.15
2.19
0.00
43.00
6.15
2.19
0.00
44.00
6.15
2.19
0.00
45.00
6.15
2.19
0.00
46.00
6.15
2.19
0.00
47.00
6.15
2.19
0.00
48.00
6.15
2.19
0.00
49.00
6.15
2.19
0.00
50.00
6.15
2.19
0.00
51.00
6.15
2.19
0.00
52.00
6.15
2.19
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.15
2.19
0.00
54.00
6.15
2.19
0.00
55.00
6.15
2.19
0.00
56.00
6.15
2.19
0.00
57.00
6.15
2.19
0.00
58.00
6.15
2.19
0.00
59.00
6.15
2.19
0.00
60.00
6.15
2.19
0.00
VA

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 62
Summary for Subcatchment 4S: POI #2 Post -Development
Runoff = 15.57 cfs @ 12.06 hrs, Volume= 0.971 af, Depth= 2.74"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 25-Year Rainfall=6.15"
Area (ac) CN
Description
0.650 98
BUA on Lots
0.160 98
BUA in Private R/W
3.450 61
>75% Grass cover, Good, HSG B
4.260 68
Weighted Average
3.450
80.99% Pervious Area
0.810
19.01 % Impervious Area
Tc Length
Slope Velocity Capacity Description
(min) (feet)
(ft/ft) (ft/sec) (cfs)
14.0
Direct Entry,
Subcatchment 4S: POI #2 Post -Development
Hydrograph
-T-T--I-T-,----T-T--I--I -T------T-T----T-T----T-T-T----T-T----T-T-T--
17 ■Runoff
-t-�-- 15.57 cfs-rt--I--I--t--I--I--t-rt--I--r-t--I--r-t-�- I--r-�--I--r-t-�--
16-L-J-----1--1--1--L--1--1--L-1--1--L-1--1--L-L-�- L-p1- L �--
15 - 1 pM h�
-------------
,IIIII IIIIIIIIIIIIIIIIIIIIIII
14 I-12-lYaa�ar�far<�Ir6�'��'�--
---- - - -i -
- --------------T-i---
13 �_ _ _ _ j�_p_y_�_ _ %� c� _x
-r-r--r-r-r-r-r--1--r-r--1--1--r-r--1--r RUnOff /� rthai—yF.2VIV a4--
12----�-�-�----1------1---'--1-----1------1-----1---�-�--
11-L-J--1--L-�-L-1--1--1--L--1--1--L-1--1-�TtOffILVo11� 1P=1O V11,af
I I I I I I I I I I I I I I I
w 10 I 1 1 1 1 1 1 1 11 I I I I I I
w -;- - -;-; -;- - - - - -;- - -T-Runoff D thrZ7�4`_-
g
3-r-r--r-r-r-r-r--1--r-r--1--1--r-r--1--r-r--1--r-r-r- 1--r-r--1--r-r-r--
0 8 T A 'rh '^1
LL -L---1--+-L-L-L__1--1--+--1--1--L-L--1--L-+__I__�_L_L_-r��.�7 1f7Y 11-f7__
7 _1_L__I__L_L _L_1IILIIL_1IL_1IL_ L_JIL_L _
6
5
-T-T--T-T-T -T-T--1--T-T--1--1--r-T--1--r-T--1--r-r-T--1--r-T--1--r-T-T--
4
-t-t--r-t-t-r-t--1--r-t--1--I--t-t--I--r-t--1--r-t-t--r-r---1--r-t-t--
3-a-L--�-L-L -L-L--1---L---1--L-L--1--L-L--1--L-L-L--1--L-L--1--L-L-L--
2
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
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
Time (hours)
80

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 63
Hydrograph for Subcatchment 4S: POI #2 Post -Development
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
0.14
0.00
0.00
3.00
0.21
0.00
0.00
4.00
0.30
0.00
0.00
5.00
0.39
0.00
0.00
6.00
0.49
0.00
0.00
7.00
0.61
0.00
0.00
8.00
0.74
0.00
0.00
9.00
0.90
0.00
0.00
10.00
1.11
0.01
0.05
11.00
1.45
0.05
0.26
12.00
4.08
1.25
13.12
13.00
4.75
1.70
1.32
14.00
5.04
1.91
0.78
15.00
5.25
2.06
0.60
16.00
5.41
2.18
0.48
17.00
5.55
2.28
0.41
18.00
5.66
2.37
0.37
19.00
5.77
2.44
0.32
20.00
5.85
2.51
0.27
21.00
5.93
2.57
0.25
22.00
6.01
2.63
0.25
23.00
6.08
2.68
0.24
24.00
6.15
2.74
0.23
25.00
6.15
2.74
0.00
26.00
6.15
2.74
0.00
27.00
6.15
2.74
0.00
28.00
6.15
2.74
0.00
29.00
6.15
2.74
0.00
30.00
6.15
2.74
0.00
31.00
6.15
2.74
0.00
32.00
6.15
2.74
0.00
33.00
6.15
2.74
0.00
34.00
6.15
2.74
0.00
35.00
6.15
2.74
0.00
36.00
6.15
2.74
0.00
37.00
6.15
2.74
0.00
38.00
6.15
2.74
0.00
39.00
6.15
2.74
0.00
40.00
6.15
2.74
0.00
41.00
6.15
2.74
0.00
42.00
6.15
2.74
0.00
43.00
6.15
2.74
0.00
44.00
6.15
2.74
0.00
45.00
6.15
2.74
0.00
46.00
6.15
2.74
0.00
47.00
6.15
2.74
0.00
48.00
6.15
2.74
0.00
49.00
6.15
2.74
0.00
50.00
6.15
2.74
0.00
51.00
6.15
2.74
0.00
52.00
6.15
2.74
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.15
2.74
0.00
54.00
6.15
2.74
0.00
55.00
6.15
2.74
0.00
56.00
6.15
2.74
0.00
57.00
6.15
2.74
0.00
58.00
6.15
2.74
0.00
59.00
6.15
2.74
0.00
60.00
6.15
2.74
0.00
81

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 64
Summary for Pond 1 P: Pond
Inflow Area = 7.860 ac, 21.25% Impervious, Inflow Depth = 2.83" for 25-Year event
Inflow = 30.15 cfs @ 12.06 hrs, Volume= 1.854 of
Outflow = 13.81 cfs @ 12.22 hrs, Volume= 1.842 af, Atten= 54%, Lag= 9.7 min
Primary = 13.81 cfs @ 12.22 hrs, Volume= 1.842 of
Routing by Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Peak Elev= 685.81' @ 12.22 hrs Surf.Area= 16,561 sf Storage= 25,877 cf
Plug -Flow detention time= 111.7 min calculated for 1.842 of (99% of inflow)
Center -of -Mass det. time= 108.2 min ( 951.3 - 843.2 )
Volume Invert Avail.Storage Storage Description
#1 684.00' 68,318 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
684.00 11,957 0 0
685.00 14,605 13,281 13,281
686.00 17,025 15,815 29,096
687.00 19,271 18,148 47,244
688.00 22,876 21,074 68,318
Device Routing Invert Outlet Devices
#1 Primary 677.00' 24.0" Round Outfall
L= 90.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 677.00' / 676.55' S= 0.0050 '/' Cc= 0.900
n= 0.013, Flow Area= 3.14 sf
#2 Device 1 684.00' 3.0" Vert. Channel Protection Orifice C= 0.600
#3 Device 1 686.00' 48.0" x 48.0" Horiz. Top of Riser C= 0.600
Limited to weir flow at low heads
#4 Device 1 684.25' Volume Weir, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 0.50 0.50 1.75 1.75
Width (feet) 1.00 1.00 3.00 3.00 0.00
Primary OutFlow Max=13.81 cfs @ 12.22 hrs HW=685.81' (Free Discharge)
L1=Outfall (Passes 13.81 cfs of 41.95 cfs potential flow)
12=Channel Protection Orifice (Orifice Controls 0.31 cfs @ 6.25 fps)
3=Top of Riser ( Controls 0.00 cfs)
4=Volume Weir (Weir Controls 13.50 cfs @ 3.67 fps)
82

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 65
1
32
31
LL
20,
Pond 1 P: Pond
Hydrograph
--
---F- T- T------F- T -T- ----T-T--1- T- T------F-T- inflow
S-li--Ir-r-rt--li--li--Ir-T---li--Ir-r-T- --li
pp-''---r-rt--li--li--Ir-r- ❑ Primary
QwA
Poa-kT'IE'j v =05,8'j'�, T
- F T -T -- T-T StTorag - 2578',77-qf
-- - -'- ---'----=---'-
I - -I- - r - r - r - -I - -I- - r - r - r - -I - - I- - r - r - r - -I- - I- - r - r - -I - -I- - r - r -
- L - -I- - L - L - 1 - J - -I- - L - L - L - -I - - I- - r - L - L - -I- - L - L - 1 - J - -I- - L - L -
--I,--I,--T - - II, ----I,-- - - II,--II--I- - - II, --I,--II--i- - - II, ----II-- - -
r - -I- - r - r - r - -I - -I- - r - t - r - -I - - I- - r - t - r - -I- - I- - r - r - -I - -I- - r - 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
Time (hours)
688
687
w
w
0 686
w
w
685
684
PtVolume
Channel
Weir
Protection Orifice
0
5
10 15
Pond 1 P: Pond
Stage -Discharge
20 25 30 35 40 45
Discharge (cfs)
❑ Primary
83

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 66
688
687
w
w
0 686
w
w
685
684
0
Pond 1 P: Pond
Stage -Area -Storage
Surface/Horizontal/Wetted Area (sq-ft)
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 22,000
10,000 20,000 30,000 40,000 50,000 60,000
Storage (cubic -feet)
Surface
❑ Storage
84

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 67
Hydrograph for Pond 1 P: Pond
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
0.00
0.00
0
684.00
0.00
2.00
0.00
0
684.00
0.00
4.00
0.00
0
684.00
0.00
6.00
0.00
0
684.00
0.00
8.00
0.00
0
684.00
0.00
10.00
0.13
169
684.01
0.00
12.00
25.99
14,545
685.09
4.01
14.00
1.46
11,367
684.87
2.06
16.00
0.89
8,968
684.70
1.16
18.00
0.69
7,589
684.60
0.83
20.00
0.51
6,684
684.53
0.63
22.00
0.46
6,089
684.48
0.51
24.00
0.43
5,808
684.46
0.46
26.00
0.00
3,989
684.32
0.17
28.00
0.00
3,129
684.25
0.09
30.00
0.00
2,574
684.21
0.07
32.00
0.00
2,140
684.18
0.05
34.00
0.00
1,809
684.15
0.04
36.00
0.00
1,553
684.13
0.03
38.00
0.00
1,355
684.11
0.02
40.00
0.00
1,196
684.10
0.02
42.00
0.00
1,067
684.09
0.02
44.00
0.00
963
684.08
0.01
46.00
0.00
876
684.07
0.01
48.00
0.00
800
684.07
0.01
50.00
0.00
735
684.06
0.01
52.00
0.00
678
684.06
0.01
54.00
0.00
628
684.05
0.01
56.00
0.00
585
684.05
0.01
58.00
0.00
548
684.05
0.00
60.00
0.00
516
684.04
0.00
85

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 68
Elevation Primary
(feet)
(cfs)
684.00
0.00
684.02
0.00
684.04
0.00
684.06
0.01
684.08
0.01
684.10
0.02
684.12
0.03
684.14
0.04
684.16
0.05
684.18
0.05
684.20
0.06
684.22
0.07
684.24
0.08
684.26
0.09
684.28
0.11
684.30
0.14
684.32
0.17
684.34
0.20
684.36
0.23
684.38
0.27
684.40
0.31
684.42
0.36
684.44
0.40
684.46
0.45
684.48
0.50
684.50
0.55
684.52
0.61
684.54
0.66
684.56
0.72
684.58
0.78
684.60
0.84
684.62
0.90
684.64
0.97
684.66
1.03
684.68
1.10
684.70
1.17
684.72
1.24
684.74
1.31
684.76
1.39
684.78
1.49
684.80
1.60
684.82
1.73
684.84
1.86
684.86
2.00
684.88
2.15
684.90
2.30
684.92
2.47
684.94
2.63
684.96
2.81
684.98
2.98
685.00
3.17
685.02
3.36
685.04
3.55
Stage -Discharge for Pond 1 P: Pond
Elevation Primary
(feet)
(cfs)
685.06
3.75
685.08
3.95
685.10
4.16
685.12
4.37
685.14
4.58
685.16
4.80
685.18
5.03
685.20
5.25
685.22
5.49
685.24
5.72
685.26
5.96
685.28
6.20
685.30
6.45
685.32
6.70
685.34
6.96
685.36
7.21
685.38
7.47
685.40
7.74
685.42
8.01
685.44
8.28
685.46
8.55
685.48
8.83
685.50
9.11
685.52
9.39
685.54
9.68
685.56
9.97
685.58
10.26
685.60
10.56
685.62
10.86
685.64
11.16
685.66
11.46
685.68
11.77
685.70
12.08
685.72
12.39
685.74
12.71
685.76
13.03
685.78
13.35
685.80
13.67
685.82
14.00
685.84
14.33
685.86
14.66
685.88
15.00
685.90
15.33
685.92
15.67
685.94
16.02
685.96
16.36
685.98
16.71
686.00
17.06
686.02
17.53
686.04
18.11
686.06
18.75
686.08
19.45
686.10
20.19
Elevation Primary
(feet)
(cfs)
686.12
20.98
686.14
21.81
686.16
22.67
686.18
23.57
686.20
24.50
686.22
25.46
686.24
26.45
686.26
27.47
686.28
28.51
686.30
29.58
686.32
30.68
686.34
31.80
686.36
32.95
686.38
34.12
686.40
35.31
686.42
36.53
686.44
37.77
686.46
39.03
686.48
40.30
686.50
41.61
686.52
42.93
686.54
44.01
686.56
44.07
686.58
44.12
686.60
44.18
686.62
44.23
686.64
44.29
686.66
44.34
686.68
44.40
686.70
44.45
686.72
44.51
686.74
44.56
686.76
44.61
686.78
44.67
686.80
44.72
686.82
44.78
686.84
44.83
686.86
44.89
686.88
44.94
686.90
44.99
686.92
45.05
686.94
45.10
686.96
45.15
686.98
45.21
687.00
45.26
687.02
45.32
687.04
45.37
687.06
45.42
687.08
45.48
687.10
45.53
687.12
45.58
687.14
45.64
687.16
45.69
Elevation Primary
(feet)
(cfs)
687.18
45.74
687.20
45.79
687.22
45.85
687.24
45.90
687.26
45.95
687.28
46.01
687.30
46.06
687.32
46.11
687.34
46.16
687.36
46.22
687.38
46.27
687.40
46.32
687.42
46.37
687.44
46.43
687.46
46.48
687.48
46.53
687.50
46.58
687.52
46.63
687.54
46.69
687.56
46.74
687.58
46.79
687.60
46.84
687.62
46.89
687.64
46.94
687.66
47.00
687.68
47.05
687.70
47.10
687.72
47.15
687.74
47.20
687.76
47.25
687.78
47.30
687.80
47.35
687.82
47.40
687.84
47.45
687.86
47.50
687.88
47.55
687.90
47.60
687.92
47.64
687.94
47.69
687.96
47.74
687.98
47.79
688.00
47.83
86

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 69
Stage -Area -Storage for Pond 1 P: Pond
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
684.00
11,957
0
684.05
12,089
601
684.10
12,222
1,209
684.15
12,354
1,823
684.20
12,487
2,444
684.25
12,619
3,072
684.30
12,751
3,706
684.35
12,884
4,347
684.40
13,016
4,995
684.45
13,149
5,649
684.50
13,281
6,310
684.55
13,413
6,977
684.60
13,546
7,651
684.65
13,678
8,331
684.70
13,811
9,019
684.75
13,943
9,713
684.80
14,075
10,413
684.85
14,208
11,120
684.90
14,340
11,834
684.95
14,473
12,554
685.00
14,605
13,281
685.05
14,726
14,014
685.10
14,847
14,754
685.15
14,968
15,499
685.20
15,089
16,250
685.25
15,210
17,008
685.30
15,331
17,771
685.35
15,452
18,541
685.40
15,573
19,317
685.45
15,694
20,098
685.50
15,815
20,886
685.55
15,936
21,680
685.60
16,057
22,480
685.65
16,178
23,285
685.70
16,299
24,097
685.75
16,420
24,915
685.80
16,541
25,739
685.85
16,662
26,569
685.90
16,783
27,406
685.95
16,904
28,248
686.00
17,025
29,096
686.05
17,137
29,950
686.10
17,250
30,810
686.15
17,362
31,675
686.20
17,474
32,546
686.25
17,587
33,422
686.30
17,699
34,305
686.35
17,811
35,192
686.40
17,923
36,086
686.45
18,036
36,985
686.50
18,148
37,889
686.55
18,260
38,799
686.60
18,373
39,715
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
686.65
18,485
40,637
686.70
18,597
41,564
686.75
18,710
42,496
686.80
18,822
43,435
686.85
18,934
44,379
686.90
19,046
45,328
686.95
19,159
46,283
687.00
19,271
47,244
687.05
19,451
48,212
687.10
19,632
49,189
687.15
19,812
50,175
687.20
19,992
51,170
687.25
20,172
52,174
687.30
20,352
53,188
687.35
20,533
54,210
687.40
20,713
55,241
687.45
20,893
56,281
687.50
21,074
57,330
687.55
21,254
58,388
687.60
21,434
59,456
687.65
21,614
60,532
687.70
21,795
61,617
687.75
21,975
62,711
687.80
22,155
63,814
687.85
22,335
64,927
687.90
22,515
66,048
687.95
22,696
67,178
688.00
22,876
68,318
87

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 70
Summary for Link 1 L: POI #3 Pre -Development
Inflow Area = 12.120 ac, 1.16% Impervious, Inflow Depth = 2.03" for 25-Year event
Inflow = 32.10 cfs @ 12.07 hrs, Volume= 2.046 of
Primary = 32.10 cfs @ 12.07 hrs, Volume= 2.046 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
�O*
38
FL
Link 1 L: POI #3 Pre -Development
Hydrograph
-----r-r----li--I--r------li--Ir-r-7-.--li----r----li--Ir-Ir-r- ■ Inflow
■ Primary
-- +-t-rt-- +-t-1019W 24-Oiq-
-J--1--L-L-1--1--1--L-1-L--1--1--L-1-L--I--I--L-L--I--I--L-L-
-L----L-L-L-L--L-L-L-L------L-L-L------L-L------L-L-
-J--1--L-L-1--1--�--L-1-L--�--L-L-1-J--1--L-L-1--�--�--L-L-
-- ---- II -II - III ------ II - - III ----II -II -III------II -II - III ------ II -II
------II-I_-------I_----- -II - I_- -- --- -II -I_-------I_-I_-
--
-li--IF- Ir-7--li--I--I - IT---I--li -Ir-T---I--li - Ir-7--li----IF- Ir-
-
-I --I- - r -+- 1-- I- -I- - T -+- 1--I- -I - - +- 7-- I --I- - r -+-
.0
Time (hours)
88

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 71
Hydrograph for Link 1 L: POI #3 Pre -Development
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
0.07
0.00
0.07
12.00
26.18
0.00
26.18
13.00
3.02
0.00
3.02
14.00
1.81
0.00
1.81
15.00
1.42
0.00
1.42
16.00
1.13
0.00
1.13
17.00
0.99
0.00
0.99
18.00
0.88
0.00
0.88
19.00
0.77
0.00
0.77
20.00
0.66
0.00
0.66
21.00
0.62
0.00
0.62
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
89

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 72
Summary for Link 2L: POI #3 Post -Development
Inflow Area = 12.120 ac, 20.46% Impervious, Inflow Depth > 2.79" for 25-Year event
Inflow = 25.34 cfs @ 12.11 hrs, Volume= 2.813 of
Primary = 25.34 cfs @ 12.11 hrs, Volume= 2.813 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Link 2L: POI #3 Post -Development
Hydrograph
-L--'--L-L-L--'--'--L-L- --'--'--L-L-L--'--'--L-L--'--I--L-L-
- I_
II -II -I -II -II
--I--'F-r-7--I--I- F-T-;--I--' r-T--1--I-- r-7--I--I- F -T
-
J----IL-L-1------IL- I1-J------L-T-J------L-1------IL-L-
1--III--IIr- Ir-7--III--III--I'r- IT-1--III--III-- IT-7-1--III--III-- IT-7--III--III--IIr- IT-
-��- I�II -��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
Time (hours)
■ Inflow
■ Primary
OIl]

Belle Mar Type 11 24-hr 25-Year Rainfall=6.15"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 73
Hydrograph for Link 2L: POI #3 Post -Development
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
0.05
0.00
0.05
11.00
0.28
0.00
0.28
12.00
17.14
0.00
17.14
13.00
5.90
0.00
5.90
14.00
2.83
0.00
2.83
15.00
2.01
0.00
2.01
16.00
1.63
0.00
1.63
17.00
1.37
0.00
1.37
18.00
1.19
0.00
1.19
19.00
1.04
0.00
1.04
20.00
0.90
0.00
0.90
21.00
0.81
0.00
0.81
22.00
0.76
0.00
0.76
23.00
0.72
0.00
0.72
24.00
0.69
0.00
0.69
25.00
0.28
0.00
0.28
26.00
0.17
0.00
0.17
27.00
0.11
0.00
0.11
28.00
0.09
0.00
0.09
29.00
0.08
0.00
0.08
30.00
0.07
0.00
0.07
31.00
0.06
0.00
0.06
32.00
0.05
0.00
0.05
33.00
0.05
0.00
0.05
34.00
0.04
0.00
0.04
35.00
0.04
0.00
0.04
36.00
0.03
0.00
0.03
37.00
0.03
0.00
0.03
38.00
0.02
0.00
0.02
39.00
0.02
0.00
0.02
40.00
0.02
0.00
0.02
41.00
0.02
0.00
0.02
42.00
0.02
0.00
0.02
43.00
0.01
0.00
0.01
44.00
0.01
0.00
0.01
45.00
0.01
0.00
0.01
46.00
0.01
0.00
0.01
47.00
0.01
0.00
0.01
48.00
0.01
0.00
0.01
49.00
0.01
0.00
0.01
50.00
0.01
0.00
0.01
51.00
0.01
0.00
0.01
52.00
0.01
0.00
0.01
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.01
0.00
0.01
54.00
0.01
0.00
0.01
55.00
0.01
0.00
0.01
56.00
0.01
0.00
0.01
57.00
0.01
0.00
0.01
58.00
0.00
0.00
0.00
59.00
0.00
0.00
0.00
60.00
0.00
0.00
0.00
S

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 74
Summary for Subcatchment 1S: POI #1 Pre -Development
Runoff = 25.73 cfs @ 12.07 hrs, Volume= 1.614 af, Depth= 2.46"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 50-Year Rainfall=6.94"
Area (ac) CN Description
7.860 59 Woods/Grass
7.860 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
13.6 Direct Entry, User Input
Subcatchment 1S: POI #1 Pre -Development
Hydrograph
-r-r--r-t-r--i--r-r--i--r-t--i--r-r-r--i--r-r--i--r-r-r--r-r-r--i--r-r-r-
28 ■Runoff
-- -- -- 25.73 cfs ---I------I------I---- --I--- - -----; - - - -
26 1 1 " 241 h�
-1-J--'--L-�-L-1--1--'--L--'--'--L-1--'--L-1--'--L-r-J- '
24
-�-�--�--+-�
2z
- -- --=- ----I----=--'--I- - --I- -
20RtJnbff Arbal=7.86'0 a4
18 F u Off +ol'u_i !Q=t6 j4_,aj
w 16
- - -T - --T------r-7----r-T-Runoff Depth;:2.46-1
3 14
a 12 - ----I - -- -I - ----I --------- ----I - ----I------��1 I.�fi--
10 1" Y
-7-7----T-1 -1-7------T------r-7----1-1----1-r-1----1-7----1-1-1--
8
-------I-I ----------------------------------I--------I--
6
-1-J--'--L-�-L-1--1--'--L--'--'--L-1--'--L-1--'--L-r-J--'--L-�--'--L-i-J--
4
-r-r--r-t-r r-r--i--r-t--i--r-r-r--i--r-r--i--r-r-r--r-r-r--i--r-r-r--
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
Time (hours)
M,

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 75
Hydrograph for Subcatchment 1S: POI #1 Pre -Development
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
0.44
0.00
0.00
6.00
0.56
0.00
0.00
7.00
0.69
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.02
0.00
0.00
10.00
1.26
0.00
0.00
11.00
1.63
0.01
0.14
12.00
4.60
1.02
21.41
13.00
5.36
1.44
2.33
14.00
5.69
1.64
1.39
15.00
5.92
1.79
1.09
16.00
6.11
1.91
0.87
17.00
6.26
2.01
0.75
18.00
6.39
2.09
0.67
19.00
6.51
2.17
0.59
20.00
6.61
2.24
0.50
21.00
6.70
2.30
0.47
22.00
6.78
2.35
0.45
23.00
6.86
2.41
0.44
24.00
6.94
2.46
0.42
25.00
6.94
2.46
0.00
26.00
6.94
2.46
0.00
27.00
6.94
2.46
0.00
28.00
6.94
2.46
0.00
29.00
6.94
2.46
0.00
30.00
6.94
2.46
0.00
31.00
6.94
2.46
0.00
32.00
6.94
2.46
0.00
33.00
6.94
2.46
0.00
34.00
6.94
2.46
0.00
35.00
6.94
2.46
0.00
36.00
6.94
2.46
0.00
37.00
6.94
2.46
0.00
38.00
6.94
2.46
0.00
39.00
6.94
2.46
0.00
40.00
6.94
2.46
0.00
41.00
6.94
2.46
0.00
42.00
6.94
2.46
0.00
43.00
6.94
2.46
0.00
44.00
6.94
2.46
0.00
45.00
6.94
2.46
0.00
46.00
6.94
2.46
0.00
47.00
6.94
2.46
0.00
48.00
6.94
2.46
0.00
49.00
6.94
2.46
0.00
50.00
6.94
2.46
0.00
51.00
6.94
2.46
0.00
52.00
6.94
2.46
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.94
2.46
0.00
54.00
6.94
2.46
0.00
55.00
6.94
2.46
0.00
56.00
6.94
2.46
0.00
57.00
6.94
2.46
0.00
58.00
6.94
2.46
0.00
59.00
6.94
2.46
0.00
60.00
6.94
2.46
0.00
ON

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 76
Summary for Subcatchment 2S: POI #1 Post -Development
Runoff = 36.98 cfs @ 12.06 hrs, Volume= 2.269 af, Depth= 3.46"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 50-Year Rainfall=6.94"
Area (ac) CN Description
6.040 61 >75% Grass cover, Good, HSG B
0.150 55 Woods, Good, HSG B
1.290 98 BUA on Lots
0.380 98 BUA in Private R/W
7.860 69 Weighted Average
6.190 78.75% Pervious Area
1.670 21.25% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
13.6 Direct Entry, User Defined
Subcatchment 2S: POI #1 Post -Development
Hydrograph
40
-
-+-�--�
36.98
-+----r-+-----+-----r-+----+-+-----r-----+-+-�--
■Runoff
cfs
38
-r-t---- -
-�-�--� -T-,
---r----r-t----r-r-r----r-t----r-r-r----r-r---- t-t--
-�-�--I--� T--I--I--r-�--I--I- T--I--I-I -�- ���p�- - �Th�'-
34
32
-T ------ -
-
-I - ----I �y #
- ----I---- --I-- 5-ICI_ea��r -IRain allw"6..7 r�--
1111111111111111
30
28
-L-J----L-L
I I
-L-L------L------L-L--'--
I I I 11 rrbff-Arta-7.860 ad- -
26
-1-J----1-L
-+-+----+-
-L-L--'--'--L--'----L-L--'--L-L--'--L-L-L--'--L---'--L-1-L--
--+------+------+---i�uji9ff-Voltamp=2'I12 99 af-
w 24
....22
-+-+----+-+
-r-r--r-t-r
-+-+------+------+-+----+-+----+-+-+----+-+----+-+-+--
Do'pt[v=3. f6'1'-
-
20
0
a 18
-7-I--I -T-I
- --i--i -
-I-7--I--I-T--I--I--r-7--I--I-T----I-r-I
111111111111
-i - --i--i -----i-- r - --i --i - --i --i -
16
-?-- -
-�I -----�-- --I_ ----- ----------------------./1�1�'V '-
14
-L-L----L-L
I I I I I
-L-L--'--'--L- --'--L-L--'--L-L----L-L-L----L-L------L----
I I I I I I I I I I I I I I I I I I I I I I I
12
-L-J----L-L
-L-L--'--'--L--'--'--L-L--'--L-L----L-L-L----L-L----L-1-L--
10
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 I I
-L-------+------ -----L-+----L- - ---- -----L-+- --
8
-+-+--�-+-�
-I-+-----+-----I-I----I-I-----I-I----I-I-----+-+--
6
-r-t----t-r
- r-r--I----t----I--r-r--I--r- t _-I-_r_ r_7_- I-_ r-r--I--r-Y_r__
4
i
-r-r----?-
-r------r------r-r----r-r----Ir-r-r----r-r----Ir-r-r
94

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 77
Hydrograph for Subcatchment 2S: POI #1 Post -Development
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
0.44
0.00
0.00
6.00
0.56
0.00
0.00
7.00
0.69
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.02
0.00
0.06
10.00
1.26
0.03
0.25
11.00
1.63
0.10
0.81
12.00
4.60
1.67
32.19
13.00
5.36
2.22
2.94
14.00
5.69
2.47
1.73
15.00
5.92
2.65
1.34
16.00
6.11
2.80
1.06
17.00
6.26
2.92
0.91
18.00
6.39
3.02
0.81
19.00
6.51
3.11
0.71
20.00
6.61
3.19
0.60
21.00
6.70
3.27
0.56
22.00
6.78
3.33
0.54
23.00
6.86
3.40
0.52
24.00
6.94
3.46
0.50
25.00
6.94
3.46
0.00
26.00
6.94
3.46
0.00
27.00
6.94
3.46
0.00
28.00
6.94
3.46
0.00
29.00
6.94
3.46
0.00
30.00
6.94
3.46
0.00
31.00
6.94
3.46
0.00
32.00
6.94
3.46
0.00
33.00
6.94
3.46
0.00
34.00
6.94
3.46
0.00
35.00
6.94
3.46
0.00
36.00
6.94
3.46
0.00
37.00
6.94
3.46
0.00
38.00
6.94
3.46
0.00
39.00
6.94
3.46
0.00
40.00
6.94
3.46
0.00
41.00
6.94
3.46
0.00
42.00
6.94
3.46
0.00
43.00
6.94
3.46
0.00
44.00
6.94
3.46
0.00
45.00
6.94
3.46
0.00
46.00
6.94
3.46
0.00
47.00
6.94
3.46
0.00
48.00
6.94
3.46
0.00
49.00
6.94
3.46
0.00
50.00
6.94
3.46
0.00
51.00
6.94
3.46
0.00
52.00
6.94
3.46
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.94
3.46
0.00
54.00
6.94
3.46
0.00
55.00
6.94
3.46
0.00
56.00
6.94
3.46
0.00
57.00
6.94
3.46
0.00
58.00
6.94
3.46
0.00
59.00
6.94
3.46
0.00
60.00
6.94
3.46
0.00
OR

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 78
Summary for Subcatchment 3S: POA #2 Pre -Development
Runoff = 15.56 cfs @ 12.06 hrs, Volume= 0.979 af, Depth= 2.76"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 50-Year Rainfall=6.94"
Area (ac) CN Description
4.120 61 Pasture/grassland/range, Good, HSG B
0.140 98 Existing R/W
4.260 62 Weighted Average
4.120 96.71 % Pervious Area
0.140 3.29% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
14.0 Direct Entry,
Subcatchment 3S: POA #2 Pre -Development
Hydrograph
17 ---i------i--r-----i--------r------------i -- --i--
■Runoff
15.56 cfs - ------------r- ---- - ---- -r- ----r- ---- - - --
16 - - ---- - - -------+------ -'---- -+---- - - - - -pp- - --
15
14 -T--1-- -T-;- F -T - ----T------T-T----T5Q-Year
rTrrrrTrrr_Ra_atfaW-6.94_'q
13 1-r-r----r-U„bfApdc&4.260ad
--
12----�-�-�-------------'---------------------T-�--
11-1-J----T-�-L-1--1--'--1--'--'--r---'-F�uTtOff�LV'�{r1umq=O.V19iaf -
I I I I I I I I I I I I I I I
10
-Runoff D -thr27�6.,r-
3-T-T--I -T-,--T--I--I-T------T-T----T-T----T-T-�- I-- �T----T-T -T
---
0 8 �C'—=14I'' Mih
LL ------+_�_____----+------r------T-----r-�-.�
6
--------------------------------------------------------�.-__�-1------
5
-T-T--T -T--T-T--I--T- T------T-T---- T-T----T -T-----T-T--I-- -T-T--
4-+-�--I--+-1-r-+--I--I--T--I--I--+-�--I--r-+--I--r-+-�--I--r-�--I--r-+-�--
3-1_J--L_T-. -L-1--1--L-T-J--'--L-1----L-1-----r----------L-T-J--
2
1 I I I I I I I I I I I I I I I I I I I 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
Time (hours)
E*N

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 79
Hydrograph for Subcatchment 3S: POA #2 Pre -Development
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
0.44
0.00
0.00
6.00
0.56
0.00
0.00
7.00
0.69
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.02
0.00
0.00
10.00
1.26
0.00
0.00
11.00
1.63
0.03
0.18
12.00
4.60
1.20
12.91
13.00
5.36
1.66
1.37
14.00
5.69
1.88
0.81
15.00
5.92
2.04
0.64
16.00
6.11
2.16
0.50
17.00
6.26
2.27
0.44
18.00
6.39
2.36
0.39
19.00
6.51
2.45
0.34
20.00
6.61
2.52
0.29
21.00
6.70
2.58
0.27
22.00
6.78
2.64
0.26
23.00
6.86
2.70
0.25
24.00
6.94
2.76
0.24
25.00
6.94
2.76
0.00
26.00
6.94
2.76
0.00
27.00
6.94
2.76
0.00
28.00
6.94
2.76
0.00
29.00
6.94
2.76
0.00
30.00
6.94
2.76
0.00
31.00
6.94
2.76
0.00
32.00
6.94
2.76
0.00
33.00
6.94
2.76
0.00
34.00
6.94
2.76
0.00
35.00
6.94
2.76
0.00
36.00
6.94
2.76
0.00
37.00
6.94
2.76
0.00
38.00
6.94
2.76
0.00
39.00
6.94
2.76
0.00
40.00
6.94
2.76
0.00
41.00
6.94
2.76
0.00
42.00
6.94
2.76
0.00
43.00
6.94
2.76
0.00
44.00
6.94
2.76
0.00
45.00
6.94
2.76
0.00
46.00
6.94
2.76
0.00
47.00
6.94
2.76
0.00
48.00
6.94
2.76
0.00
49.00
6.94
2.76
0.00
50.00
6.94
2.76
0.00
51.00
6.94
2.76
0.00
52.00
6.94
2.76
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.94
2.76
0.00
54.00
6.94
2.76
0.00
55.00
6.94
2.76
0.00
56.00
6.94
2.76
0.00
57.00
6.94
2.76
0.00
58.00
6.94
2.76
0.00
59.00
6.94
2.76
0.00
60.00
6.94
2.76
0.00
01FA

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 80
Summary for Subcatchment 4S: POI #2 Post -Development
Runoff = 19.19 cfs @ 12.06 hrs, Volume= 1.193 af, Depth= 3.36"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 50-Year Rainfall=6.94"
Area (ac) CN
Description
0.650 98
BUA on Lots
0.160 98
BUA in Private R/W
3.450 61
>75% Grass cover, Good, HSG B
4.260 68
Weighted Average
3.450
80.99% Pervious Area
0.810
19.01 % Impervious Area
Tc Length
Slope Velocity Capacity Description
(min) (feet)
(ft/ft) (ft/sec) (cfs)
14.0
Direct Entry,
Subcatchment 4S: POI #2 Post -Development
Hydrograph
-i--i _I-- _I _ _I _I _I -- -I- -I-----I-- --I
21-- ■Runoff
20 -LL 19.19 cfs - ------ ------ - ---- - ---- - - ---- - ---- - - --
�h19-+-+----+-+-+-+------+------+-+----+-+----+-+-+- �/f1L�- - -r
18-1-r--r-T-1-r-1--i--r-T--i--r-r-1--i--rCT--i--r-r-1--r-r-r-'-i�-/-�r-�7�-r--
17 -----,-- - -, -----,------,--, -----r�7 �1>f raid FF�i �fTEr-.7��F"
16 -- - --�-- - -� -----�------�-- - --�-- -----�-- ---�-- -----�-- --�-
15 - -----T-_j -'L-------i-------_L----LRUrtb�#�f-AKba-=4-.26'�0 -ad -
14 - -----�--4 -1-I--1----I--1--I--1-I--OUI--110�_'v U_ �rF�. 11,af -
13 -+---r-+-�-+-+----r-+- ----+- --�- 9
w ---�i--i - - -i ---�i--i -----�i-- - --�i- r -p
11 - --�--� --Runoff-_D"th;=136'�_
9 - ---i--+- - -------+----i-- - --i---+--i-- - - --i-- - --i-- -+- --
8 -+-----+-1-+-+------T----i--+-----r-+----+-+-----r-+-��-
7-1-1----T-,-1_1__I-- I-- T------r-1--I--r- T--I--1-1-1--I--1-1--1--1- T-1--
6 ---�i--i - - -i ---�i--i ---�i--i - - --�i-- ---�i--i - ---i - ---�i--i - --�i--
5 -----'-_ - -� -----'------'-- - --'-- -----'-- - --'-- -----'-- --'--
4 - - ---- - - - ------ ------ - ---- - ---- - - ---- - ---- - - --
3-+-+----+-+ -+-+------+------+-+----r-+----+-+-+----r-+----+-+-+--
2 - T - 1 - - - - T - - T - - - - - - T - - - - - -I -I - - - -I - T - - - -'1 _ 1 - 1 - - - - 1 - 1 _ _II- -I1 - T - I- -
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
Time (hours)
98

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 81
Hydrograph for Subcatchment 4S: POI #2 Post -Development
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
0.44
0.00
0.00
6.00
0.56
0.00
0.00
7.00
0.69
0.00
0.00
8.00
0.83
0.00
0.00
9.00
1.02
0.00
0.01
10.00
1.26
0.02
0.11
11.00
1.63
0.09
0.40
12.00
4.60
1.60
16.35
13.00
5.36
2.14
1.57
14.00
5.69
2.39
0.92
15.00
5.92
2.56
0.72
16.00
6.11
2.70
0.56
17.00
6.26
2.82
0.49
18.00
6.39
2.93
0.43
19.00
6.51
3.02
0.38
20.00
6.61
3.10
0.32
21.00
6.70
3.17
0.30
22.00
6.78
3.23
0.29
23.00
6.86
3.30
0.28
24.00
6.94
3.36
0.27
25.00
6.94
3.36
0.00
26.00
6.94
3.36
0.00
27.00
6.94
3.36
0.00
28.00
6.94
3.36
0.00
29.00
6.94
3.36
0.00
30.00
6.94
3.36
0.00
31.00
6.94
3.36
0.00
32.00
6.94
3.36
0.00
33.00
6.94
3.36
0.00
34.00
6.94
3.36
0.00
35.00
6.94
3.36
0.00
36.00
6.94
3.36
0.00
37.00
6.94
3.36
0.00
38.00
6.94
3.36
0.00
39.00
6.94
3.36
0.00
40.00
6.94
3.36
0.00
41.00
6.94
3.36
0.00
42.00
6.94
3.36
0.00
43.00
6.94
3.36
0.00
44.00
6.94
3.36
0.00
45.00
6.94
3.36
0.00
46.00
6.94
3.36
0.00
47.00
6.94
3.36
0.00
48.00
6.94
3.36
0.00
49.00
6.94
3.36
0.00
50.00
6.94
3.36
0.00
51.00
6.94
3.36
0.00
52.00
6.94
3.36
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
6.94
3.36
0.00
54.00
6.94
3.36
0.00
55.00
6.94
3.36
0.00
56.00
6.94
3.36
0.00
57.00
6.94
3.36
0.00
58.00
6.94
3.36
0.00
59.00
6.94
3.36
0.00
60.00
6.94
3.36
0.00
OR

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 82
Summary for Pond 1 P: Pond
Inflow Area = 7.860 ac, 21.25% Impervious, Inflow Depth = 3.46" for 50-Year event
Inflow = 36.98 cfs @ 12.06 hrs, Volume= 2.269 of
Outflow = 19.49 cfs @ 12.20 hrs, Volume= 2.258 af, Atten= 47%, Lag= 8.4 min
Primary = 19.49 cfs @ 12.20 hrs, Volume= 2.258 of
Routing by Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Peak Elev= 686.08' @ 12.20 hrs Surf.Area= 17,207 sf Storage= 30,485 cf
Plug -Flow detention time= 98.6 min calculated for 2.257 of (99% of inflow)
Center -of -Mass det. time= 95.8 min ( 933.1 - 837.3 )
Volume Invert Avail.Storage Storage Description
#1 684.00' 68,318 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
684.00 11,957 0 0
685.00 14,605 13,281 13,281
686.00 17,025 15,815 29,096
687.00 19,271 18,148 47,244
688.00 22,876 21,074 68,318
Device Routing Invert Outlet Devices
#1 Primary 677.00' 24.0" Round Outfall
L= 90.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 677.00' / 676.55' S= 0.0050 '/' Cc= 0.900
n= 0.013, Flow Area= 3.14 sf
#2 Device 1 684.00' 3.0" Vert. Channel Protection Orifice C= 0.600
#3 Device 1 686.00' 48.0" x 48.0" Horiz. Top of Riser C= 0.600
Limited to weir flow at low heads
#4 Device 1 684.25' Volume Weir, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 0.50 0.50 1.75 1.75
Width (feet) 1.00 1.00 3.00 3.00 0.00
Primary OutFlow Max=19.48 cfs @ 12.20 hrs HW=686.08' (Free Discharge)
L1=Outfall (Passes 19.48 cfs of 42.73 cfs potential flow)
12=Channel Protection Orifice (Orifice Controls 0.33 cfs @ 6.73 fps)
3=Top of Riser (Weir Controls 1.21 cfs @ 0.93 fps)
4=Volume Weir (Orifice Controls 17.95 cfs @ 4.22 fps)
Will

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 83
Pond 1 P: Pond
Hydrograph
40
-r-r-
-I_
36.98 cfs
_r-r-r--I--I-_
r-r
- r- -I-_I_ _ r _ Y _ 7 _ _I_ _I_ _ r _ T _ _I_ _I_ _ r _ r _
I
38
- -
--I--
--- --
--
- -
-- - -
--
`�, QI 'I �+I
� �Q IA ea�7 ,86Q-ac -
36
34
-1-
-+-_�----'--
----'--
I
-J--1--L-L-1--1----L-1-
- --'--'
- -
I
----'--' -+-
I
------L-1-J------L-1----'-- - -
---�?ak -
32
30
T-
--
- rI
--
111
-
------
-r�-�r-8-I'-r -
ry
- --I-S{� _3MM-4r; -
28
26
-1-
----'--
-J--1--L-L-1--1----L-1-
------L-1-J------L-1----'-- - -
w 24
-+-+------
-+----+-+-+------+-+-+------+-+-+------+-+------+-+-
V 22
-t-r
19.49 Cfs r--I--r-r-r--I--I--r-t-r--I--r-r-r-r--I--r-r-r--I--I--r-r-
0 20
-T-
--I--
-----r-r-
----I-- -T-
--I-- -r-T- --I-- -r-----I-- -r-
a 18
16
-1-
--'--'-
-J--1--L-L-1--1----L-1-
------L-1-J------L-1----'-- - -
14
-+-+-----
-+----+-+-+------+-+-+------+-+-+------+-+------+-+-
12
10
I
I
-T-T--I--i
I
I
-T--I--r-r--1--I--r-
I
I I
I I
-T-T--I--i
I I I I I I I I
- r- T- T--I--r -r-----I-- -r-
8
6
-L-
--'--'-
--1--L-L-1--1----r-L-
------L-1-J--1----L-1----'--r- -
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
Time (hours)
688
687
w
w
0 686
w
w
685
684
PtVolume
Channel
Weir
Protection Orifice
0
5
10 15
Pond 1 P: Pond
Stage -Discharge
20 25 30 35 40 45
Discharge (cfs)
e Inflow
❑ Primary
❑ Primary
il11111111i

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 84
688
687
w
w
0 686
w
w
685
684
0
Pond 1 P: Pond
Stage -Area -Storage
Surface/Horizontal/Wetted Area (sq-ft)
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 22,000
10,000 20,000 30,000 40,000 50,000 60,000
Storage (cubic -feet)
Surface
❑ Storage
102

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 85
Hydrograph for Pond 1 P: Pond
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
0.00
0.00
0
684.00
0.00
2.00
0.00
0
684.00
0.00
4.00
0.00
0
684.00
0.00
6.00
0.00
0
684.00
0.00
8.00
0.00
0
684.00
0.00
10.00
0.25
540
684.04
0.00
12.00
32.19
18,466
685.35
7.02
14.00
1.73
11,965
684.91
2.38
16.00
1.06
9,553
684.74
1.30
18.00
0.81
8,157
684.64
0.96
20.00
0.60
7,168
684.56
0.73
22.00
0.54
6,513
684.52
0.60
24.00
0.50
6,206
684.49
0.53
26.00
0.00
4,133
684.33
0.19
28.00
0.00
3,202
684.26
0.09
30.00
0.00
2,630
684.21
0.07
32.00
0.00
2,183
684.18
0.05
34.00
0.00
1,842
684.15
0.04
36.00
0.00
1,579
684.13
0.03
38.00
0.00
1,375
684.11
0.03
40.00
0.00
1,212
684.10
0.02
42.00
0.00
1,080
684.09
0.02
44.00
0.00
974
684.08
0.01
46.00
0.00
885
684.07
0.01
48.00
0.00
808
684.07
0.01
50.00
0.00
741
684.06
0.01
52.00
0.00
684
684.06
0.01
54.00
0.00
633
684.05
0.01
56.00
0.00
590
684.05
0.01
58.00
0.00
552
684.05
0.00
60.00
0.00
520
684.04
0.00
WIN

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 86
Elevation Primary
(feet)
(cfs)
684.00
0.00
684.02
0.00
684.04
0.00
684.06
0.01
684.08
0.01
684.10
0.02
684.12
0.03
684.14
0.04
684.16
0.05
684.18
0.05
684.20
0.06
684.22
0.07
684.24
0.08
684.26
0.09
684.28
0.11
684.30
0.14
684.32
0.17
684.34
0.20
684.36
0.23
684.38
0.27
684.40
0.31
684.42
0.36
684.44
0.40
684.46
0.45
684.48
0.50
684.50
0.55
684.52
0.61
684.54
0.66
684.56
0.72
684.58
0.78
684.60
0.84
684.62
0.90
684.64
0.97
684.66
1.03
684.68
1.10
684.70
1.17
684.72
1.24
684.74
1.31
684.76
1.39
684.78
1.49
684.80
1.60
684.82
1.73
684.84
1.86
684.86
2.00
684.88
2.15
684.90
2.30
684.92
2.47
684.94
2.63
684.96
2.81
684.98
2.98
685.00
3.17
685.02
3.36
685.04
3.55
Stage -Discharge for Pond 1 P: Pond
Elevation Primary
(feet)
(cfs)
685.06
3.75
685.08
3.95
685.10
4.16
685.12
4.37
685.14
4.58
685.16
4.80
685.18
5.03
685.20
5.25
685.22
5.49
685.24
5.72
685.26
5.96
685.28
6.20
685.30
6.45
685.32
6.70
685.34
6.96
685.36
7.21
685.38
7.47
685.40
7.74
685.42
8.01
685.44
8.28
685.46
8.55
685.48
8.83
685.50
9.11
685.52
9.39
685.54
9.68
685.56
9.97
685.58
10.26
685.60
10.56
685.62
10.86
685.64
11.16
685.66
11.46
685.68
11.77
685.70
12.08
685.72
12.39
685.74
12.71
685.76
13.03
685.78
13.35
685.80
13.67
685.82
14.00
685.84
14.33
685.86
14.66
685.88
15.00
685.90
15.33
685.92
15.67
685.94
16.02
685.96
16.36
685.98
16.71
686.00
17.06
686.02
17.53
686.04
18.11
686.06
18.75
686.08
19.45
686.10
20.19
Elevation Primary
(feet)
(cfs)
686.12
20.98
686.14
21.81
686.16
22.67
686.18
23.57
686.20
24.50
686.22
25.46
686.24
26.45
686.26
27.47
686.28
28.51
686.30
29.58
686.32
30.68
686.34
31.80
686.36
32.95
686.38
34.12
686.40
35.31
686.42
36.53
686.44
37.77
686.46
39.03
686.48
40.30
686.50
41.61
686.52
42.93
686.54
44.01
686.56
44.07
686.58
44.12
686.60
44.18
686.62
44.23
686.64
44.29
686.66
44.34
686.68
44.40
686.70
44.45
686.72
44.51
686.74
44.56
686.76
44.61
686.78
44.67
686.80
44.72
686.82
44.78
686.84
44.83
686.86
44.89
686.88
44.94
686.90
44.99
686.92
45.05
686.94
45.10
686.96
45.15
686.98
45.21
687.00
45.26
687.02
45.32
687.04
45.37
687.06
45.42
687.08
45.48
687.10
45.53
687.12
45.58
687.14
45.64
687.16
45.69
Elevation Primary
(feet)
(cfs)
687.18
45.74
687.20
45.79
687.22
45.85
687.24
45.90
687.26
45.95
687.28
46.01
687.30
46.06
687.32
46.11
687.34
46.16
687.36
46.22
687.38
46.27
687.40
46.32
687.42
46.37
687.44
46.43
687.46
46.48
687.48
46.53
687.50
46.58
687.52
46.63
687.54
46.69
687.56
46.74
687.58
46.79
687.60
46.84
687.62
46.89
687.64
46.94
687.66
47.00
687.68
47.05
687.70
47.10
687.72
47.15
687.74
47.20
687.76
47.25
687.78
47.30
687.80
47.35
687.82
47.40
687.84
47.45
687.86
47.50
687.88
47.55
687.90
47.60
687.92
47.64
687.94
47.69
687.96
47.74
687.98
47.79
688.00
47.83
itell I

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 87
Stage -Area -Storage for Pond 1 P: Pond
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
684.00
11,957
0
684.05
12,089
601
684.10
12,222
1,209
684.15
12,354
1,823
684.20
12,487
2,444
684.25
12,619
3,072
684.30
12,751
3,706
684.35
12,884
4,347
684.40
13,016
4,995
684.45
13,149
5,649
684.50
13,281
6,310
684.55
13,413
6,977
684.60
13,546
7,651
684.65
13,678
8,331
684.70
13,811
9,019
684.75
13,943
9,713
684.80
14,075
10,413
684.85
14,208
11,120
684.90
14,340
11,834
684.95
14,473
12,554
685.00
14,605
13,281
685.05
14,726
14,014
685.10
14,847
14,754
685.15
14,968
15,499
685.20
15,089
16,250
685.25
15,210
17,008
685.30
15,331
17,771
685.35
15,452
18,541
685.40
15,573
19,317
685.45
15,694
20,098
685.50
15,815
20,886
685.55
15,936
21,680
685.60
16,057
22,480
685.65
16,178
23,285
685.70
16,299
24,097
685.75
16,420
24,915
685.80
16,541
25,739
685.85
16,662
26,569
685.90
16,783
27,406
685.95
16,904
28,248
686.00
17,025
29,096
686.05
17,137
29,950
686.10
17,250
30,810
686.15
17,362
31,675
686.20
17,474
32,546
686.25
17,587
33,422
686.30
17,699
34,305
686.35
17,811
35,192
686.40
17,923
36,086
686.45
18,036
36,985
686.50
18,148
37,889
686.55
18,260
38,799
686.60
18,373
39,715
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
686.65
18,485
40,637
686.70
18,597
41,564
686.75
18,710
42,496
686.80
18,822
43,435
686.85
18,934
44,379
686.90
19,046
45,328
686.95
19,159
46,283
687.00
19,271
47,244
687.05
19,451
48,212
687.10
19,632
49,189
687.15
19,812
50,175
687.20
19,992
51,170
687.25
20,172
52,174
687.30
20,352
53,188
687.35
20,533
54,210
687.40
20,713
55,241
687.45
20,893
56,281
687.50
21,074
57,330
687.55
21,254
58,388
687.60
21,434
59,456
687.65
21,614
60,532
687.70
21,795
61,617
687.75
21,975
62,711
687.80
22,155
63,814
687.85
22,335
64,927
687.90
22,515
66,048
687.95
22,696
67,178
688.00
22,876
68,318
`11

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 88
Summary for Link 1 L: POI #3 Pre -Development
Inflow Area = 12.120 ac, 1.16% Impervious, Inflow Depth = 2.57" for 50-Year event
Inflow = 41.29 cfs @ 12.07 hrs, Volume= 2.593 of
Primary = 41.29 cfs @ 12.07 hrs, Volume= 2.593 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Link 1 L: POI #3 Pre -Development
Hydrograph
46
-+-+-+--+-+-+-+-+--+-+-+-+--+-+-+-+-+--+-+-+-+-+--+-+-+-+--+-+-+-
-+-
--
-1--L-L-L----'--
-+-
------L-+-------L-L----'--
-+-
cfs
44
42
-T-;
---------
41.29
---
---------------------F
----T-T----I--'
-T---
---T-T-T--1--I-
�� -� e4=1'�2T�-
T---('--'1-T-
-
Y
40
-+-+--I--+
-+----+-+-+------+-+-+----+-r-+-+----+-+-+-+--+-+-+-
38
-T--1----'I-
--1----'F-r-I------'F-T--1------r-T--1------r-_T------'F-T-
36
-1-
--'--'-
-J--1--L-L-L--'--'--L-1-L------L-1-J------L-L------L-+-
34
-T-
t-
-- - II -
-t----Ir-Y-t------r-t-t------r-T-t------Y-t------Ir-T-
32
---------
----------------------------------------------------
30
-+-L--'--'-
-L--'--L-+-L--'--'--L-+-L--'--'--L-+-L--'--'--+-L--'--'--L-+-
28
w 26
-1-L----I'-
-J--1--L-L-L--'--'--L-1-L------L-1-J------L-L------L-1-
-- 24
-+-+--I--I-
-+--I--+-+-+--I--I--+-+-+--I--I--r-+-+--I--I--+-+--I--I--+-+-
0 22
- -
--I--
----I--;
- -
----I--; -
- --I--; - ----I--;
- - ----I--;
-
-
a 20
-L-L--'--'
-L--'--L-+-L--'--'--L-+-L------L-L-L------+-L------L-+
18
-T-
----
-----L-r-
------L-T-
---- -r-T- ----
-r-------L-T-
16
-
-
-
14
-+-1--I--I
-----+-+-
----+-+-T-1------r-+-
----I--r-
------+-+-
12
- -
--I--
----I--;
- -
----I--; -
- --I--; - ----I--;
- - ----I--;
-
-
10
-1-L--'--
J--1--L-L-L--'--'--L-1-L------L-1-J------L-L------L-1-
8
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
Time (hours)
■ Inflow
■ Primary
106

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 89
Hydrograph for Link 1 L: POI #3 Pre -Development
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
0.32
0.00
0.32
12.00
34.32
0.00
34.32
13.00
3.70
0.00
3.70
14.00
2.21
0.00
2.21
15.00
1.73
0.00
1.73
16.00
1.37
0.00
1.37
17.00
1.19
0.00
1.19
18.00
1.06
0.00
1.06
19.00
0.93
0.00
0.93
20.00
0.79
0.00
0.79
21.00
0.74
0.00
0.74
22.00
0.72
0.00
0.72
23.00
0.69
0.00
0.69
24.00
0.66
0.00
0.66
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
i[ofl

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 90
Summary for Link 2L: POI #3 Post -Development
Inflow Area = 12.120 ac, 20.46% Impervious, Inflow Depth > 3.42" for 50-Year event
Inflow = 33.39 cfs @ 12.11 hrs, Volume= 3.451 of
Primary = 33.39 cfs @ 12.11 hrs, Volume= 3.451 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Link 2L: POI #3 Post -Development
Hydrograph
■ Inflow
36
-1-
-+-
-
33.39
-1--L-L-1--1----L-1-
cfs --'--
- -
----'-- -+-rfl
------L-1-J------L-1----'--
-//'- -
- -
■ Primary
34
32
30
- -
--'--'-
- --'--
- -
----'-- -
-----'-- - -----'-- -----'--
-
-
28
26
- -
--'--'-
- --'--
- -
----'-- -
-----'-- - -----'-- -----'--
-
-
24
-+---'--'-
---'---+---'--'--+-+-+------+-+-+------+-+--'--'--+-+-
N 22
u
_1---I--I-
-J----L-l-1------L-1-__----L-1-J------L-1------L-1-
20
18
0
E 16
-+-+--'--'-
+--'--+-+-+--'--'--+-+-+--'--'--+-+-+--'--'--+-+--'--'--+-+-
14
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
I
I
12
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 I
I
I
10
8
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
I
I
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
Time (hours)
108

Belle Mar Type 11 24-hr 50-Year Rainfall=6.94"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 91
Hydrograph for Link 2L: POI #3 Post -Development
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
0.12
0.00
0.12
11.00
0.45
0.00
0.45
12.00
23.37
0.00
23.37
13.00
7.00
0.00
7.00
14.00
3.30
0.00
3.30
15.00
2.33
0.00
2.33
16.00
1.87
0.00
1.87
17.00
1.59
0.00
1.59
18.00
1.39
0.00
1.39
19.00
1.22
0.00
1.22
20.00
1.05
0.00
1.05
21.00
0.95
0.00
0.95
22.00
0.88
0.00
0.88
23.00
0.84
0.00
0.84
24.00
0.80
0.00
0.80
25.00
0.32
0.00
0.32
26.00
0.19
0.00
0.19
27.00
0.12
0.00
0.12
28.00
0.09
0.00
0.09
29.00
0.08
0.00
0.08
30.00
0.07
0.00
0.07
31.00
0.06
0.00
0.06
32.00
0.05
0.00
0.05
33.00
0.05
0.00
0.05
34.00
0.04
0.00
0.04
35.00
0.04
0.00
0.04
36.00
0.03
0.00
0.03
37.00
0.03
0.00
0.03
38.00
0.03
0.00
0.03
39.00
0.02
0.00
0.02
40.00
0.02
0.00
0.02
41.00
0.02
0.00
0.02
42.00
0.02
0.00
0.02
43.00
0.01
0.00
0.01
44.00
0.01
0.00
0.01
45.00
0.01
0.00
0.01
46.00
0.01
0.00
0.01
47.00
0.01
0.00
0.01
48.00
0.01
0.00
0.01
49.00
0.01
0.00
0.01
50.00
0.01
0.00
0.01
51.00
0.01
0.00
0.01
52.00
0.01
0.00
0.01
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.01
0.00
0.01
54.00
0.01
0.00
0.01
55.00
0.01
0.00
0.01
56.00
0.01
0.00
0.01
57.00
0.01
0.00
0.01
58.00
0.00
0.00
0.00
59.00
0.00
0.00
0.00
60.00
0.00
0.00
0.00
`[R

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 92
Summary for Subcatchment 1S: POI #1 Pre -Development
Runoff = 32.21 cfs @ 12.06 hrs, Volume= 2.000 af, Depth= 3.05"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 100-Year Rainfall=7.77"
Area (ac) CN Description
7.860 59 Woods/Grass
7.860 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
13.6 Direct Entry, User Input
Subcatchment 1S: POI #1 Pre -Development
Hydrograph
-T-r--r-T-T--r-r-T--1--r-T--1--1--r-T--1--r-T--1--r-r-T--1--r-T--1--r-T-r--
-+-+---- --+--1--1--+--1--1--+-+--1--+-+--1--+-+-+--1--+-+--1--+-+-+-- ■Runoff
_1-J-- 32.21 cfs-�--�'--�'--�--�'--�'--�-�--�'--�-�--�'--��-�-�--�'--�-�--�'--��-�-�--
32
-1-J--'--L-
30
--
28
26
24
22
- - - -'- - -
H 20
3 18
---'--' -=-
0
a 16
14
12
10
-+---1--+-
6
-1-J--'--1-
4
1
- 1--1----1--'--'--L-1-- L-1-- L- Ty 1-0-�1b-r-
1T T-T400-N—ear Rainfall""T.77`;r
- --;- -!----;--! ---;-4-ftrrbff-Arch=7.860-ad--
Flip UMP-7
Dept[rr3FO5"--
Tc=13A M i ti
-F-7----- T------T-T----T- T----F -T- ----T-N-5
-1- - I- - T - -1- -1- - r - 4--1- - r - T - -1 - - T - r - T - --
-+-T--1--1--T--1--1--T-�--1--T-+--1--+-+-�--1--T-�--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
Time (hours)
iflf

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 93
Hydrograph for Subcatchment 1S: POI #1 Pre -Development
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
0.77
0.00
0.00
8.00
0.93
0.00
0.00
9.00
1.14
0.00
0.00
10.00
1.41
0.00
0.00
11.00
1.83
0.03
0.35
12.00
5.15
1.32
27.21
13.00
6.00
1.84
2.80
14.00
6.37
2.08
1.67
15.00
6.63
2.25
1.30
16.00
6.84
2.39
1.03
17.00
7.01
2.51
0.90
18.00
7.16
2.61
0.80
19.00
7.29
2.71
0.70
20.00
7.40
2.79
0.59
21.00
7.50
2.86
0.56
22.00
7.59
2.92
0.54
23.00
7.68
2.99
0.52
24.00
7.77
3.05
0.50
25.00
7.77
3.05
0.00
26.00
7.77
3.05
0.00
27.00
7.77
3.05
0.00
28.00
7.77
3.05
0.00
29.00
7.77
3.05
0.00
30.00
7.77
3.05
0.00
31.00
7.77
3.05
0.00
32.00
7.77
3.05
0.00
33.00
7.77
3.05
0.00
34.00
7.77
3.05
0.00
35.00
7.77
3.05
0.00
36.00
7.77
3.05
0.00
37.00
7.77
3.05
0.00
38.00
7.77
3.05
0.00
39.00
7.77
3.05
0.00
40.00
7.77
3.05
0.00
41.00
7.77
3.05
0.00
42.00
7.77
3.05
0.00
43.00
7.77
3.05
0.00
44.00
7.77
3.05
0.00
45.00
7.77
3.05
0.00
46.00
7.77
3.05
0.00
47.00
7.77
3.05
0.00
48.00
7.77
3.05
0.00
49.00
7.77
3.05
0.00
50.00
7.77
3.05
0.00
51.00
7.77
3.05
0.00
52.00
7.77
3.05
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.77
3.05
0.00
54.00
7.77
3.05
0.00
55.00
7.77
3.05
0.00
56.00
7.77
3.05
0.00
57.00
7.77
3.05
0.00
58.00
7.77
3.05
0.00
59.00
7.77
3.05
0.00
60.00
7.77
3.05
0.00
ism

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 94
Summary for Subcatchment 2S: POI #1 Post -Development
Runoff = 44.33 cfs @ 12.06 hrs, Volume= 2.721 af, Depth= 4.15"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 100-Year Rainfall=7.77"
Area (ac) CN Description
6.040 61 >75% Grass cover, Good, HSG B
0.150 55 Woods, Good, HSG B
1.290 98 BUA on Lots
0.380 98 BUA in Private R/W
7.860 69 Weighted Average
6.190 78.75% Pervious Area
1.670 21.25% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
13.6 Direct Entry, User Defined
Subcatchment 2S: POI #1 Post -Development
Hydrograph
48
'
-
--�--I
44.33
---1I--�I--T--------
------
-------- ----------�I-- --�I--
■Runoff
46
44
-1-L--
-
-----T-,
cfs
-r-T------T------T-T-_�_-T-T----T-T-1-1'
-1--'--'--L--'--'--L-1--'--L-L--'--L-L-L-�-'--L-L--'--L-L-L--
h
!'-`s----
42
-L-J--'--1-
-L-1--1--'--1------L-1----L-1{{}}----L-L-1--''
-1---
40
-T-
--T-T-
-T-T----T-T----Ir-T-T--li-40
- earl RainfalIT/I. 7'1'
38
--'�
------'-�
--'� -'�
--'�------'-�----'--'�
--'� --'--�
- ----� ----y-,------� - --�--
36
34
-+-+----+-+
-?----�--
-r-+------+------+-+----+���frC�1�6'�--
----?----�--
--------?--�--�
32
30
-
-T-- -T-
-
- --I---T----I--T-
--I-
I �'QJJ'r7TO�l�.i-�1J111=`��Ta-
H 28
26
- T
- T - -T-T-
-T-T----T-T--li--li--T-
----T-T-
p{ * w C
F�pF#-D�npkr�#.d��
,° 22
-
- ----+-
-I'
-------+------+-
jr
-+----I'=i3':ir'riii--
20
18
-
----�--
- -�I--
----�------�----
----�I--
--�--;-----�--------------
N=6-
16
14
-L-J----1-1
_L_
r-�--I--r-T--I--�-r-�--r-r-�--I--�-T-T--
12
--T----I--r-T--I----T----I--r-4--I----T-T--
10
--'
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 I I
8
-+-+----+-+
-+-+------+------+-----r-+----+-+-----r-----+-+-+--
6
-?----�--
11
----?----�--
--------?----�I--
-------------------�-- --�--
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
Time (hours)
Ism

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 95
Hydrograph for Subcatchment 2S: POI #1 Post -Development
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
0.77
0.00
0.00
8.00
0.93
0.00
0.00
9.00
1.14
0.01
0.15
10.00
1.41
0.05
0.39
11.00
1.83
0.16
1.12
12.00
5.15
2.07
38.89
13.00
6.00
2.71
3.44
14.00
6.37
3.01
2.02
15.00
6.63
3.21
1.56
16.00
6.84
3.38
1.23
17.00
7.01
3.52
1.06
18.00
7.16
3.64
0.94
19.00
7.29
3.75
0.82
20.00
7.40
3.84
0.69
21.00
7.50
3.92
0.65
22.00
7.59
4.00
0.62
23.00
7.68
4.08
0.60
24.00
7.77
4.15
0.58
25.00
7.77
4.15
0.00
26.00
7.77
4.15
0.00
27.00
7.77
4.15
0.00
28.00
7.77
4.15
0.00
29.00
7.77
4.15
0.00
30.00
7.77
4.15
0.00
31.00
7.77
4.15
0.00
32.00
7.77
4.15
0.00
33.00
7.77
4.15
0.00
34.00
7.77
4.15
0.00
35.00
7.77
4.15
0.00
36.00
7.77
4.15
0.00
37.00
7.77
4.15
0.00
38.00
7.77
4.15
0.00
39.00
7.77
4.15
0.00
40.00
7.77
4.15
0.00
41.00
7.77
4.15
0.00
42.00
7.77
4.15
0.00
43.00
7.77
4.15
0.00
44.00
7.77
4.15
0.00
45.00
7.77
4.15
0.00
46.00
7.77
4.15
0.00
47.00
7.77
4.15
0.00
48.00
7.77
4.15
0.00
49.00
7.77
4.15
0.00
50.00
7.77
4.15
0.00
51.00
7.77
4.15
0.00
52.00
7.77
4.15
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.77
4.15
0.00
54.00
7.77
4.15
0.00
55.00
7.77
4.15
0.00
56.00
7.77
4.15
0.00
57.00
7.77
4.15
0.00
58.00
7.77
4.15
0.00
59.00
7.77
4.15
0.00
60.00
7.77
4.15
0.00
MCI

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 96
Summary for Subcatchment 3S: POA #2 Pre -Development
Runoff = 19.20 cfs @ 12.06 hrs, Volume= 1.200 af, Depth= 3.38"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 100-Year Rainfall=7.77"
Area (ac) CN Description
4.120 61 Pasture/grassland/range, Good, HSG B
0.140 98 Existing R/W
4.260 62 Weighted Average
4.120 96.71 % Pervious Area
0.140 3.29% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
14.0 Direct Entry,
Subcatchment 3S: POA #2 Pre -Development
Hydrograph
21
20
j
TT
19.20
TTITTT TTITTITT T TTITTI T TTITTITT TTII--I--I-----I-- --I--
- TI------ ----- - TI-----T------ ------ - TI------T----
■Runoff
cfs
19
- - ----+-
- -------+------ - ---- -+---- - - -�/�p --
1 MK
18
17
-r-r--r-+-r
-T-T--' -T-;
-r-r----r-+----r-r-r----r-r----r-r-r--r-r-r--1--r-r-r--
-'-T--'--'-T------T-T--- 00-Y(W RaEinffaIP--7.77-1
16
15
- - - - - -- -
- +
--- ------ ------ - ---- - ------ ------ - ------ ----
L + ]:PUrtbff-Arde&4.26'D -ad--
14
13
- - ----+-
T -+-+--+-+-+
- -------+------ - ---F u Q0_1V12 0+a T
-+-+--I--I--+-+--I--+-+--I-
w 12
11
------ --T-,
-'r----'----T------r------r-T- - +�-
111111111111 1 Rwnoff Dapth;=13
010
- I'I--'I--' --I - I'I
-' - I'I--'I--' --I----'I--' - I'I--'I--' - I'I--'I--' -'
9
8
- - ----+-
- -------+------ - ---- -+---- - - ---- -----��-+�- --
7
6
'
-Y-r--r-+-r
-r-Y----r-+-7----r-T----r-Y----r-r-r----r-r--I--r-Y-r--
5
--'------'---'
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 I I
4
-1-J--'--+-
-L-1--1----+------L-1--'---+--'-- - -----L-1--'-- -+- --
3
-+-+--+-+-+
-+-+-+--+-+-+--+-+-+-+--+-+-+--+-+-+--+-+-+-+--+-+-+--
2
-Y-r--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
Time (hours)
114

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 97
Hydrograph for Subcatchment 3S: POA #2 Pre -Development
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
0.77
0.00
0.00
8.00
0.93
0.00
0.00
9.00
1.14
0.00
0.00
10.00
1.41
0.01
0.05
11.00
1.83
0.05
0.30
12.00
5.15
1.53
16.14
13.00
6.00
2.09
1.64
14.00
6.37
2.35
0.97
15.00
6.63
2.53
0.75
16.00
6.84
2.68
0.59
17.00
7.01
2.81
0.52
18.00
7.16
2.92
0.46
19.00
7.29
3.01
0.40
20.00
7.40
3.10
0.34
21.00
7.50
3.17
0.32
22.00
7.59
3.24
0.31
23.00
7.68
3.31
0.30
24.00
7.77
3.38
0.28
25.00
7.77
3.38
0.00
26.00
7.77
3.38
0.00
27.00
7.77
3.38
0.00
28.00
7.77
3.38
0.00
29.00
7.77
3.38
0.00
30.00
7.77
3.38
0.00
31.00
7.77
3.38
0.00
32.00
7.77
3.38
0.00
33.00
7.77
3.38
0.00
34.00
7.77
3.38
0.00
35.00
7.77
3.38
0.00
36.00
7.77
3.38
0.00
37.00
7.77
3.38
0.00
38.00
7.77
3.38
0.00
39.00
7.77
3.38
0.00
40.00
7.77
3.38
0.00
41.00
7.77
3.38
0.00
42.00
7.77
3.38
0.00
43.00
7.77
3.38
0.00
44.00
7.77
3.38
0.00
45.00
7.77
3.38
0.00
46.00
7.77
3.38
0.00
47.00
7.77
3.38
0.00
48.00
7.77
3.38
0.00
49.00
7.77
3.38
0.00
50.00
7.77
3.38
0.00
51.00
7.77
3.38
0.00
52.00
7.77
3.38
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.77
3.38
0.00
54.00
7.77
3.38
0.00
55.00
7.77
3.38
0.00
56.00
7.77
3.38
0.00
57.00
7.77
3.38
0.00
58.00
7.77
3.38
0.00
59.00
7.77
3.38
0.00
60.00
7.77
3.38
0.00
ON

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 98
Summary for Subcatchment 4S: POI #2 Post -Development
Runoff = 23.09 cfs @ 12.06 hrs, Volume= 1.435 af, Depth= 4.04"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 100-Year Rainfall=7.77"
Area (ac) CN
Description
0.650 98
BUA on Lots
0.160 98
BUA in Private R/W
3.450 61
>75% Grass cover, Good, HSG B
4.260 68
Weighted Average
3.450
80.99% Pervious Area
0.810
19.01 % Impervious Area
Tc Length
Slope Velocity Capacity Description
(min) (feet)
(ft/ft) (ft/sec) (cfs)
14.0
Direct Entry,
Subcatchment 4S: POI #2 Post -Development
Hydrograph
25
-
--,--
23.09
-----,--------,--
----,--
-------------, ------,-- --,--
■Runoff
24
23
'
-
-?------;-;
-+-- cfs
-,--?
--+----+----+-
------ ,------
--?
--+--+-+-+--
----
- - -�-+- - -+-- -+-+--
------ ------*17�--4�h-
, X l 4
22
21
20
-+-+--+-+-+
-
-+-+--+-+-+
---- - -
-+-+-+--+-+-+--+-+-+-+--+-+-+--+-+-+--+
-
-+-+-+--+-+-+--+-+-+-+-
- ---- - ------
---,
+-
-'�00 ba;r Refiftfal1# ,771r-
-
19
18
-------,-,
-+-+----+-+
--
-+-+-+----+----+-+-+-+--+
-------------
-
-----
-p----
I y-�---pp-,,-.yy-��-------cc--^^------
rl�bff-Ai*&4.26 -ald. -
17
16
-?----,--
-+-+--+-+-+
-
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-+-+--�--+-+----+-+-+--�-�li•Tff~V�l�u�ip�l:�4$
--------?--,----
-p----`-i---,--,--,----,---- I ----
of -
15
U 14
-?----,--
-
-
- ----+-
---?----,--
-
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---1----+--1--1--
111111111111
- l--�-
-pp-----------,-----------,--
1-+-Rtn�� .p tllr4.04„--
o 12
+-
1
1--4-.-0- +_r-Y-1-rdr-
1
10
9
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--------------------------------------------+'�$
- -�-c--,-.
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+
-
8
-
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-
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-+---- - - ---- - ---- -+- --
6
5
-+-+----+-+
-
------ -
-+-+-+----+----+-+-+-+--+-+-+--+-+-+--+-+-+-+--+-+-+--
-,
- - - - - --T------,
- ----�,
-- --- - -,- - -- - -, - ------ --�--
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
Time (hours)
116

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 99
Hydrograph for Subcatchment 4S: POI #2 Post -Development
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
0.77
0.00
0.00
8.00
0.93
0.00
0.00
9.00
1.14
0.01
0.06
10.00
1.41
0.04
0.18
11.00
1.83
0.14
0.56
12.00
5.15
1.99
19.85
13.00
6.00
2.62
1.84
14.00
6.37
2.91
1.08
15.00
6.63
3.11
0.83
16.00
6.84
3.28
0.66
17.00
7.01
3.42
0.57
18.00
7.16
3.54
0.50
19.00
7.29
3.64
0.44
20.00
7.40
3.73
0.37
21.00
7.50
3.82
0.35
22.00
7.59
3.89
0.33
23.00
7.68
3.97
0.32
24.00
7.77
4.04
0.31
25.00
7.77
4.04
0.00
26.00
7.77
4.04
0.00
27.00
7.77
4.04
0.00
28.00
7.77
4.04
0.00
29.00
7.77
4.04
0.00
30.00
7.77
4.04
0.00
31.00
7.77
4.04
0.00
32.00
7.77
4.04
0.00
33.00
7.77
4.04
0.00
34.00
7.77
4.04
0.00
35.00
7.77
4.04
0.00
36.00
7.77
4.04
0.00
37.00
7.77
4.04
0.00
38.00
7.77
4.04
0.00
39.00
7.77
4.04
0.00
40.00
7.77
4.04
0.00
41.00
7.77
4.04
0.00
42.00
7.77
4.04
0.00
43.00
7.77
4.04
0.00
44.00
7.77
4.04
0.00
45.00
7.77
4.04
0.00
46.00
7.77
4.04
0.00
47.00
7.77
4.04
0.00
48.00
7.77
4.04
0.00
49.00
7.77
4.04
0.00
50.00
7.77
4.04
0.00
51.00
7.77
4.04
0.00
52.00
7.77
4.04
0.00
Time Precip. Excess Runoff
(hours)
(inches)
(inches)
(cfs)
53.00
7.77
4.04
0.00
54.00
7.77
4.04
0.00
55.00
7.77
4.04
0.00
56.00
7.77
4.04
0.00
57.00
7.77
4.04
0.00
58.00
7.77
4.04
0.00
59.00
7.77
4.04
0.00
60.00
7.77
4.04
0.00
ON

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 100
Summary for Pond 1 P: Pond
Inflow Area = 7.860 ac, 21.25% Impervious, Inflow Depth = 4.15" for 100-Year event
Inflow = 44.33 cfs @ 12.06 hrs, Volume= 2.721 of
Outflow = 28.68 cfs @ 12.17 hrs, Volume= 2.709 af, Atten= 35%, Lag= 6.6 min
Primary = 28.68 cfs @ 12.17 hrs, Volume= 2.709 of
Routing by Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Peak Elev= 686.28' @ 12.17 hrs Surf.Area= 17,661 sf Storage= 34,007 cf
Plug -Flow detention time= 88.5 min calculated for 2.709 of (100% of inflow)
Center -of -Mass det. time= 85.8 min ( 917.9 - 832.1 )
Volume Invert Avail.Storage Storage Description
#1 684.00' 68,318 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic -feet) (cubic -feet)
684.00 11,957 0 0
685.00 14,605 13,281 13,281
686.00 17,025 15,815 29,096
687.00 19,271 18,148 47,244
688.00 22,876 21,074 68,318
Device Routing Invert Outlet Devices
#1 Primary 677.00' 24.0" Round Outfall
L= 90.0' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 677.00' / 676.55' S= 0.0050 '/' Cc= 0.900
n= 0.013, Flow Area= 3.14 sf
#2 Device 1 684.00' 3.0" Vert. Channel Protection Orifice C= 0.600
#3 Device 1 686.00' 48.0" x 48.0" Horiz. Top of Riser C= 0.600
Limited to weir flow at low heads
#4 Device 1 684.25' Volume Weir, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 0.50 0.50 1.75 1.75
Width (feet) 1.00 1.00 3.00 3.00 0.00
Primary OutFlow Max=28.66 cfs @ 12.17 hrs HW=686.28' (Free Discharge)
L1=Outfall (Passes 28.66 cfs of 43.30 cfs potential flow)
12=Channel Protection Orifice (Orifice Controls 0.35 cfs @ 7.07 fps)
3=Top of Riser (Weir Controls 7.87 cfs @ 1.74 fps)
4=Volume Weir (Orifice Controls 20.44 cfs @ 4.81 fps)
"[3

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 101
'1.7it'. `1 A'1•7ii'.
Hydrograph
48
-+-+-
44.33 CfS-',--',--'---',
+--+-+-+-+--+-+-+-+-+-F-+-+-+-+-+--+-+-+-+--+-+-+-
--',--',--',---,
--',--',--',--'---',--',--',--',--'---',--',--',--',--'--
❑ Inflow
■ Primary
ry
46
----------
---------------------
of r 'I�'/ .'v
44
-+-
------ - ----
-+-
-------+-----Qw+A---+-�-60-
42
40
--
-+-1----'--
-- ---------------------------------------------
- --'--'
--4----'--'
-+-
--L�--------�-
--'- ak 6'-2'8+-
-- - -
38
36
34
----------
-+-+--,--+-
----------
-----------
-+-+--+-+-+-+--+-+-+
-------------------------y71!llGT4��l�L_L�L_
---------------
- -------------- --- -
+
32
30
-
----
- - -
28.68 Cfs ------
- -
- + -
-
- - - - - - - +
------ -
- - - - - - - 1 - + - 1 - - - - - - + - 1 - - - - - - 1 - + -
- ------ - - ------ - ------ - -
w 28
26
-+
---------
----------------------------------------------------
+-+-+------+-+-+--i--,
I + + I- +
3 24
t° 22
-+-+--,--+
_________
-+-+--+-+-+-+--+-+-+-+-+--+-+-+-+-+--+-+-+-+--+-+-+-
____________________________________________________
20
18
---------
---------------------------------------------------
16
- +
- - -,- -I- - - -I-
-
- + - +
- - - - - - + - +
- + - - - - - - + - + - - - - - - - + - + - - - - - - I-
12
-+-+--,--+
-+-+--+-+-+-+--+-+-+-+-+--+-+-+-+-+--+-+-+-+--+-+-+-
10
---------
---------------------------------------------------
8
-+-
----- ----
-+-
------ -+-
------ -+-------+- ------ -+-
6
--------
--------------------------------------------------
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
Time (hours)
688
687
w
w
0 686
w
w
685
684
PtVolume
Channel
Weir
Protection Orifice
0
5
10 15
Pond 1 P: Pond
Stage -Discharge
20 25 30 35 40 45
Discharge (cfs)
❑ Primary
`f11I

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 102
688
687
w
w
0 686
w
w
685
684
0
Pond 1 P: Pond
Stage -Area -Storage
Surface/Horizontal/Wetted Area (sq-ft)
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 22,000
10,000 20,000 30,000 40,000 50,000 60,000
Storage (cubic -feet)
Surface
❑ Storage
120

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 103
Hydrograph for Pond 1 P: Pond
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
0.00
0.00
0
684.00
0.00
2.00
0.00
0
684.00
0.00
4.00
0.00
0
684.00
0.00
6.00
0.00
0
684.00
0.00
8.00
0.00
0
684.00
0.00
10.00
0.39
1,126
684.09
0.02
12.00
38.89
22,395
685.59
10.48
14.00
2.02
12,532
684.95
2.71
16.00
1.23
10,048
684.77
1.46
18.00
0.94
8,713
684.68
1.09
20.00
0.69
7,651
684.60
0.84
22.00
0.62
6,937
684.55
0.68
24.00
0.58
6,606
684.52
0.61
26.00
0.00
4,272
684.34
0.21
28.00
0.00
3,269
684.27
0.10
30.00
0.00
2,680
684.22
0.07
32.00
0.00
2,221
684.18
0.06
34.00
0.00
1,871
684.15
0.04
36.00
0.00
1,602
684.13
0.03
38.00
0.00
1,393
684.12
0.03
40.00
0.00
1,227
684.10
0.02
42.00
0.00
1,092
684.09
0.02
44.00
0.00
983
684.08
0.01
46.00
0.00
893
684.07
0.01
48.00
0.00
815
684.07
0.01
50.00
0.00
748
684.06
0.01
52.00
0.00
689
684.06
0.01
54.00
0.00
638
684.05
0.01
56.00
0.00
594
684.05
0.01
58.00
0.00
556
684.05
0.00
60.00
0.00
523
684.04
0.00
if►A

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 104
Elevation Primary
(feet)
(cfs)
684.00
0.00
684.02
0.00
684.04
0.00
684.06
0.01
684.08
0.01
684.10
0.02
684.12
0.03
684.14
0.04
684.16
0.05
684.18
0.05
684.20
0.06
684.22
0.07
684.24
0.08
684.26
0.09
684.28
0.11
684.30
0.14
684.32
0.17
684.34
0.20
684.36
0.23
684.38
0.27
684.40
0.31
684.42
0.36
684.44
0.40
684.46
0.45
684.48
0.50
684.50
0.55
684.52
0.61
684.54
0.66
684.56
0.72
684.58
0.78
684.60
0.84
684.62
0.90
684.64
0.97
684.66
1.03
684.68
1.10
684.70
1.17
684.72
1.24
684.74
1.31
684.76
1.39
684.78
1.49
684.80
1.60
684.82
1.73
684.84
1.86
684.86
2.00
684.88
2.15
684.90
2.30
684.92
2.47
684.94
2.63
684.96
2.81
684.98
2.98
685.00
3.17
685.02
3.36
685.04
3.55
Stage -Discharge for Pond 1 P: Pond
Elevation Primary
(feet)
(cfs)
685.06
3.75
685.08
3.95
685.10
4.16
685.12
4.37
685.14
4.58
685.16
4.80
685.18
5.03
685.20
5.25
685.22
5.49
685.24
5.72
685.26
5.96
685.28
6.20
685.30
6.45
685.32
6.70
685.34
6.96
685.36
7.21
685.38
7.47
685.40
7.74
685.42
8.01
685.44
8.28
685.46
8.55
685.48
8.83
685.50
9.11
685.52
9.39
685.54
9.68
685.56
9.97
685.58
10.26
685.60
10.56
685.62
10.86
685.64
11.16
685.66
11.46
685.68
11.77
685.70
12.08
685.72
12.39
685.74
12.71
685.76
13.03
685.78
13.35
685.80
13.67
685.82
14.00
685.84
14.33
685.86
14.66
685.88
15.00
685.90
15.33
685.92
15.67
685.94
16.02
685.96
16.36
685.98
16.71
686.00
17.06
686.02
17.53
686.04
18.11
686.06
18.75
686.08
19.45
686.10
20.19
Elevation Primary
(feet)
(cfs)
686.12
20.98
686.14
21.81
686.16
22.67
686.18
23.57
686.20
24.50
686.22
25.46
686.24
26.45
686.26
27.47
686.28
28.51
686.30
29.58
686.32
30.68
686.34
31.80
686.36
32.95
686.38
34.12
686.40
35.31
686.42
36.53
686.44
37.77
686.46
39.03
686.48
40.30
686.50
41.61
686.52
42.93
686.54
44.01
686.56
44.07
686.58
44.12
686.60
44.18
686.62
44.23
686.64
44.29
686.66
44.34
686.68
44.40
686.70
44.45
686.72
44.51
686.74
44.56
686.76
44.61
686.78
44.67
686.80
44.72
686.82
44.78
686.84
44.83
686.86
44.89
686.88
44.94
686.90
44.99
686.92
45.05
686.94
45.10
686.96
45.15
686.98
45.21
687.00
45.26
687.02
45.32
687.04
45.37
687.06
45.42
687.08
45.48
687.10
45.53
687.12
45.58
687.14
45.64
687.16
45.69
Elevation Primary
(feet)
(cfs)
687.18
45.74
687.20
45.79
687.22
45.85
687.24
45.90
687.26
45.95
687.28
46.01
687.30
46.06
687.32
46.11
687.34
46.16
687.36
46.22
687.38
46.27
687.40
46.32
687.42
46.37
687.44
46.43
687.46
46.48
687.48
46.53
687.50
46.58
687.52
46.63
687.54
46.69
687.56
46.74
687.58
46.79
687.60
46.84
687.62
46.89
687.64
46.94
687.66
47.00
687.68
47.05
687.70
47.10
687.72
47.15
687.74
47.20
687.76
47.25
687.78
47.30
687.80
47.35
687.82
47.40
687.84
47.45
687.86
47.50
687.88
47.55
687.90
47.60
687.92
47.64
687.94
47.69
687.96
47.74
687.98
47.79
688.00
47.83
WA

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 105
Stage -Area -Storage for Pond 1 P: Pond
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
684.00
11,957
0
684.05
12,089
601
684.10
12,222
1,209
684.15
12,354
1,823
684.20
12,487
2,444
684.25
12,619
3,072
684.30
12,751
3,706
684.35
12,884
4,347
684.40
13,016
4,995
684.45
13,149
5,649
684.50
13,281
6,310
684.55
13,413
6,977
684.60
13,546
7,651
684.65
13,678
8,331
684.70
13,811
9,019
684.75
13,943
9,713
684.80
14,075
10,413
684.85
14,208
11,120
684.90
14,340
11,834
684.95
14,473
12,554
685.00
14,605
13,281
685.05
14,726
14,014
685.10
14,847
14,754
685.15
14,968
15,499
685.20
15,089
16,250
685.25
15,210
17,008
685.30
15,331
17,771
685.35
15,452
18,541
685.40
15,573
19,317
685.45
15,694
20,098
685.50
15,815
20,886
685.55
15,936
21,680
685.60
16,057
22,480
685.65
16,178
23,285
685.70
16,299
24,097
685.75
16,420
24,915
685.80
16,541
25,739
685.85
16,662
26,569
685.90
16,783
27,406
685.95
16,904
28,248
686.00
17,025
29,096
686.05
17,137
29,950
686.10
17,250
30,810
686.15
17,362
31,675
686.20
17,474
32,546
686.25
17,587
33,422
686.30
17,699
34,305
686.35
17,811
35,192
686.40
17,923
36,086
686.45
18,036
36,985
686.50
18,148
37,889
686.55
18,260
38,799
686.60
18,373
39,715
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
686.65
18,485
40,637
686.70
18,597
41,564
686.75
18,710
42,496
686.80
18,822
43,435
686.85
18,934
44,379
686.90
19,046
45,328
686.95
19,159
46,283
687.00
19,271
47,244
687.05
19,451
48,212
687.10
19,632
49,189
687.15
19,812
50,175
687.20
19,992
51,170
687.25
20,172
52,174
687.30
20,352
53,188
687.35
20,533
54,210
687.40
20,713
55,241
687.45
20,893
56,281
687.50
21,074
57,330
687.55
21,254
58,388
687.60
21,434
59,456
687.65
21,614
60,532
687.70
21,795
61,617
687.75
21,975
62,711
687.80
22,155
63,814
687.85
22,335
64,927
687.90
22,515
66,048
687.95
22,696
67,178
688.00
22,876
68,318
123

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 106
Summary for Link 1 L: POI #3 Pre -Development
Inflow Area = 12.120 ac, 1.16% Impervious, Inflow Depth = 3.17" for 100-Year event
Inflow = 51.41 cfs @ 12.06 hrs, Volume= 3.200 of
Primary = 51.41 cfs @ 12.06 hrs, Volume= 3.200 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Link 1 L: POI #3 Pre -Development
Hydrograph
- - --- - - - - -- - - - - - -- --- -T- F F -T------F -r- _F_ -- T- ■ Inflow
55 - -- 51.41 cfS ---I- - - ------I-- ------- - ----- -- --------- - [I Primary
In ' =�12 � -I
I I 1 1 1 1 1 1 1 1 1 1 �Q��Ie�I I T �4 ��
I I I
50 ,-+-r--I--r -r----r-r-r------r-+-r--I--r-r-r-r----r-r-r----I--r-r
-
, 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 I I
45 -+---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 I I I I I I I I
40------'--'- -'--'--'--'---'--'--'--'--'---'--'--'--'---'--'--'--'--'---'--'--'--'--'--
35 ----i------I--, -,--- - - I --, ---- - - I --, ----- - - I --,--- - - I --, -, -
y 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 � I
w �
U i
-- 30-+- r - -I--I -r--I--r-r-r--I--I--r-+-r--I--r-r-+-r--I--r-r-r--I--I--r-r-
3 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
0
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 I
20 -+- ------------ ---------+- -------+-------- --------- -
15 - - 11114
I - - - -I 1111
I - - 111111 - - I - - 111111
I - - I - 111111
I - - I - I - 111111 - - 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 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 I I I I I
10-+-r--I--I r----r-r-r------r-+-r----r-r-r-r----r-r-r------r-r-
60
Time (hours)
124

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 107
Hydrograph for Link 1 L: POI #3 Pre -Development
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
0.05
0.00
0.05
11.00
0.65
0.00
0.65
12.00
43.35
0.00
43.35
13.00
4.44
0.00
4.44
14.00
2.63
0.00
2.63
15.00
2.06
0.00
2.06
16.00
1.62
0.00
1.62
17.00
1.41
0.00
1.41
18.00
1.26
0.00
1.26
19.00
1.10
0.00
1.10
20.00
0.93
0.00
0.93
21.00
0.87
0.00
0.87
22.00
0.84
0.00
0.84
23.00
0.81
0.00
0.81
24.00
0.78
0.00
0.78
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
`W

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 108
Summary for Link 2L: POI #3 Post -Development
Inflow Area = 12.120 ac, 20.46% Impervious, Inflow Depth = 4.10" for 100-Year event
Inflow = 46.35 cfs @ 12.13 hrs, Volume= 4.145 of
Primary = 46.35 cfs @ 12.13 hrs, Volume= 4.145 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Link 2L: POI #3 Post -Development
Hydrograph
■ Inflow
50 46.35 cfs ❑Primary
-T-r r----r-r-r------r-T-, ---r-T r--I--I- r r -r-T-
�n_4_w__ �rl'e_p=�'12T�4
45
40-+-+--1--1- -+--1--+-+-+--1--1--r-+-+--1--1--r-+-+--1--1--+-+--1--1--+-+-
1I I I I I I I I I I I I I I I I I I I I I I I I I
35 - - ------------- --------- - ------ --------- --------- -
w30 - - ----- - ---- -r- ------ - -------r- -------r- ------ - -
� 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
3 25 1 1 1 1 1 1 1 1 1 1 1
r--1--r-r-r--1--r r-T-r--1--i 1-T-r--1--i r-r--1--1- r -r
-
LL
20
15 t-t--I--I t----t-Y-t-----t-t-t------Y-t-t---4 -Y-t-----t-t-
10
.0
Time (hours)
IPU

Belle Mar Type/1 24-hr 100-Year Rainfall=7.77"
Prepared by McKim & Creed Printed 7/16/2021
HydroCAD® 10.00-15 s/n 03870 © 2015 HydroCAD Software Solutions LLC Page 109
Hydrograph for Link 2L: POI #3 Post -Development
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
0.06
0.00
0.06
10.00
0.20
0.00
0.20
11.00
0.66
0.00
0.66
12.00
30.33
0.00
30.33
13.00
7.97
0.00
7.97
14.00
3.79
0.00
3.79
15.00
2.67
0.00
2.67
16.00
2.12
0.00
2.12
17.00
1.81
0.00
1.81
18.00
1.60
0.00
1.60
19.00
1.40
0.00
1.40
20.00
1.21
0.00
1.21
21.00
1.09
0.00
1.09
22.00
1.02
0.00
1.02
23.00
0.97
0.00
0.97
24.00
0.92
0.00
0.92
25.00
0.36
0.00
0.36
26.00
0.21
0.00
0.21
27.00
0.13
0.00
0.13
28.00
0.10
0.00
0.10
29.00
0.08
0.00
0.08
30.00
0.07
0.00
0.07
31.00
0.06
0.00
0.06
32.00
0.06
0.00
0.06
33.00
0.05
0.00
0.05
34.00
0.04
0.00
0.04
35.00
0.04
0.00
0.04
36.00
0.03
0.00
0.03
37.00
0.03
0.00
0.03
38.00
0.03
0.00
0.03
39.00
0.02
0.00
0.02
40.00
0.02
0.00
0.02
41.00
0.02
0.00
0.02
42.00
0.02
0.00
0.02
43.00
0.02
0.00
0.02
44.00
0.01
0.00
0.01
45.00
0.01
0.00
0.01
46.00
0.01
0.00
0.01
47.00
0.01
0.00
0.01
48.00
0.01
0.00
0.01
49.00
0.01
0.00
0.01
50.00
0.01
0.00
0.01
51.00
0.01
0.00
0.01
52.00
0.01
0.00
0.01
Time
Inflow
Elevation
Primary
(hours)
(cfs)
(feet)
(cfs)
53.00
0.01
0.00
0.01
54.00
0.01
0.00
0.01
55.00
0.01
0.00
0.01
56.00
0.01
0.00
0.01
57.00
0.01
0.00
0.01
58.00
0.00
0.00
0.00
59.00
0.00
0.00
0.00
60.00
0.00
0.00
0.00
MAN

NIF
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PID 06150077B
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REV.NO. DESCRIPTIONS DATE
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vN4C1<]ff\4 &CREED
8020 Tower Point Drive
Charlotte, North Carolina 28227
Phone: [phone], Fax: [phone]
NC License# F-1222
www.mckimcreed.com
BELLE MAR RESIDENTIAL
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TOWN OF WEDDINGTON, NC
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A ADDRESSED COMMENTS FROM TOWN OF WEDDINGTON AND NCDOT 1 0810412021
REV.NO. DESCRIPTIONS DATE
REVISIONS
vN4CMM &CREED
8020 Tower Point Drive
Charlotte, North Carolina 28227
Phone: [phone], Fax: [phone]
NC License# F-1222
www.mckimcreed.com
BELLE MAR RESIDENTIAL
0 OLD MILL ROAD
TOWN OF WEDDINGTON, NC
POST -DEVELOPMENT
DOWNSTREAM
ANALYSIS MAP
80' 0 80' 160'
loom
SCALE: 1 "=80' (Horiz.)
DATE:
MAY 2021
MCE PROJ. #
07780-0013
DRAWN
JPM
DESIGNED
JCB
CHECKED
PMN
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PMN
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HORIZONTAL:
1.. = 80'
VERTICAL:
N/A
DA-3
DRAWING NUMBER
A
REVISION
STATUS: PRELIMINARY DRAWING
NOT FOR CONSTRUCTION,
I:\07780\0013\PDNR\80-DWG\86-DESIGN\EXHIBITS\DRAINAGE AREA MAPS.DWG - - - - 08/04/2021 19:50:58
130

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A 1 ADDRESSED COMMENTS FROM TOWN OF WEDDINGTON AND NCDOT 0810412021
REV.NO. DESCRIPTIONS DATE
REVISIONS
46,
�N4CKRW&CREED
8020 Tower Point Drive
Charlotte, North Carolina 28227
Phone: [phone], Fax: [phone]
NC License# F-1222
www.mckimcreed.com
BELLE MAR RESIDENTIAL
0 OLD MILL ROAD
TOWN OF WEDDINGTON, NC
PERMANENT DITCH
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DATE
f
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1
SCALE
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DRAWING NUMBER
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N/A
A
A
REVISION
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NOT FOR CONSTRUCTION
I:\07780\0013\PDNR\80-DWG\86-DESIGN\EXHIBITS\DRAINAGE AREA MAPS.DWG ---- 08/04/2021 19:51:03
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A 1 ADDRESSED COMMENTS FROM TOWN OF WEDDINGTON AND NCDOT 0810412021
REV.NO. DESCRIPTIONS DATE
REVISIONS
I I I
I I
I
I
1 1 I
I
BELLE MAR RESIDENTIAL
0 OLD MILL ROAD
TOWN OF WEDDINGTON, NC
CULVERT
DRAINAGE AREA MAP
r-
DATE
f
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HORIZONTAL.
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A
REVISION
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NOT FOR CONSTRUCTION
I:\07780\0013\PDNR\80-DWG\86-DESIGN\EXHIBITS\DRAINAGE AREA MAPS.DWG ---- 08/04/2021 19:51:07
132