SWA000105_Design Calculations_20220525

0., LaBeLLa
Noland Farm SWA000105
Table of Contents for additional Stormwater Calculations
Low Density Information Page 1
Channel Calculations Page 2 through Page 10
Respectfully submitted,
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Paul A. Stimpson, PE
Regional Civil Leader/Office Manager
C#0430
939 Burke Street, Suite H Winston-Salem, NC 27101 p (704) 56o-8514
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LOW DENSITY
DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 02H .1003
1
Is project below density thresholds set forth in the applicable stormwater rule?
Yes
2
Does project maximize dispersed flow and minimize channelization of flow?
Yes
3
Has the use of piping been minimized per.1003(2)(c)?
Yes
4
Side slopes of the vegetated conveyances (H:V)
3H:1V
5
Maximum velocity in the vegetated conveyances during the 10-yew storm?
4.93
6
Are curb outlet swales proposed?
No
7
Maximum jgriglitLflnal e) .e of curb outlet awale(s) (%)
N/A
8
Bottom width of curb outlet swale(s) (feet) N/A
Maximum side slope of curb outlet swale(s) (H:V) N/A
9
10
Minimum length of curb outlet swale(s) (feet)
N/A
11
Are treatment swales used instead of curb outlet swales?
No
Is stormwater released at the edge of the setback as dispersed flow?
N/A
L14
Have stormwater outlets been designed to prevent.downslope erosion?
Yes
Are variations to rule. 1003 proposed?
No
ADDITIONAL INFORMATION
15 Please use this space to provide any additional information about this low density project:
Contractor must construct channel 11(from Flared End Section 2 to the eastern property line) within the Private Drainage Easamenl
once the exIsting skimmer basin has approval to be removed.
Swale
#
Drainage
Area
ac
BUA
(ac)
Pervious
area
ac
C
Q
(cfs)
Slope
N
Vdlow
(fps)
V-i
(fps)
-
Flow depth
(ft)
1
Z07
0.14
1.93
0.50
7.14
1.12
5.00
2.78
0.65
2
1.26
0.14
1.12
0,50
4.35
3.89
5.00
3,77
0.37
3 _
0.99
0.14
0.85
0.50
3.42
1.00
5.00
2.17
0.46
4
0.30
0.09
0.21
0.50
1.04
3.60
5.00
2.63
0.32
5
0,31
0.08
0.23
0.50
1.07
3.60
5.00
2.65
0.33
6
0.17
0.07
0A0
0.50
0.59
4.20
5.00
2.47
0.27
7
1.80
0.58
1.22
0.48
5.96
4.70
5.00
4.46
0.60
8
0.62
0.27
0.35
0.57
2.44
3.90
5.00
3.33
0.44
9
0.65
0.27
0.38
0.57
2.56
3.90
5.00
3.36
0.45
10
0.52
0,16
0.36
0.50
1.79
5.40
5.00
3.48
0.37
11
2.98
0.68
2.30
0.35
7.61
5.88
5.00
4.93
0.37
12
13
14
15
16-
17
18
19
20
21
22
23
24
25
26
27
28

Trapezoidal Channel Analysis
Project Info
User Input
Bed Manning's n-Value (Nc):.032
Right Manning's n-Value (Nr):.032
Left -Side Slope (Zl) [H:1 V]: 4
Bottom Width (B) [ft]:.l
Bend Coefficient (Kb): 1
Hydraulic Results
Depth [ft]: 0.322
Froude:1.13
Project Information
Designers Name: Paul Stimpson
Designers Organization: LaBella Associates, PC
Project Number: 2211778
Project Segment: channel above point 4
Project Description:
Project Start Date: --
American gab
Excelsior
Company®
mw
Earth Science Division
Left Manning's n-Value (NI):.032
Right -Side Slope (Zr) [H:1 V]: 3
Bed Slope (S) [ft/ft]: 0.036
Design Discharge (Q] [f}'/sec]: 1:04'
Velocity [ft/sec]: 2.63
Shear [lb/ft']: 0.723
Designers Title: engineer
Project Name: Noland Farm
Project Location (City, State): Davidson County, North Carolina
Applications(s): channel stabilization
Project Bid Date: --
Mar 15th, 2022
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Trapezoidal Channel Analysis
Project Info
User Input
Bed Manning's n-Value (Nc):.032
Right Manning's n-Value (Nr):.032
Left -Side Slope (ZI) [H:I V]: 3
Bottom Width (B) [ft]:.1
Bend Coefficient (Kb): 1
Hydraulic Results
Depth [ft]: 0.326
Froude:1.13
Project Information
Designers Name: Paul Stimpson
Designers Organization: LaBella Associates, PC
Project Number: 2211778
Project Segment: channel above point 5
Project Description:
Project Start Date: --
American gift
Excelsior
Company°
lw
Earth Science Division
Left Manning's n-Value (NI):.032
Right -Side Slope (Zr) [H:1 V]: 4
Bed Slope (S) [ft/ft]: 0.036
Design Discharge (Q) [ft'/sec]: 1.07
Velocity [ft/sec]: 2.65 ✓
Shear [lb/ft']: 0.732
Designers Title: engineer
Project Name: Noland Farm
Project Location (City, State): Davidson County, North Carolina
Applications(s): channel stabilization
Project Bid Date: --
Mar 15th, 2022
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Trapezoidal Channel Analysis
Project Info
User Input
Bed Manning's n-Value (Nc):.032
Right Manning's n-Value (Nr):.032
Left -Side Slope (ZI) [H:I V]: 3
Bottom Width (B) [ft]:.1
Bend Coefficient (Kb): I
Hydraulic Results
Depth [ft]: 0.266
Froude:1.16
Project Information
Designers Name: Paul Stimpson
Designers Organization: LaBella Associates, PC
Project Number: 221778
Project Segment: channel above point 6
Project Description:
Project Start Date: --
American
Excelsior
Company°
Earth Science Division
Left Manning's n-Value (Nl):.032
Right -Side Slope (Zr) [H:1 V]: 3
Bed Slope (S) [ft/ft]: 0.042
Design Discharge (Q) [ft'/sec]:.59
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Velocity [ft/sec]: 2.47
Shear [lb/ft2]: 0.697
Designers Title: engineer
Project Name: Noland Farm
Project Location (City, State): Davidson County, North Carolina
Applications(s): channel stabilization
Project Bid Date: --
Mar 15th, 2022
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Trapezoidal Channel Analysis
Project Info
User Input
Bed Manning's n-Value (Nc):.032
Right Manning's n-Value (Nr):.032
Left -Side Slope (Zl) [H:]V]: 4
Bottom Width (B) [ft]:.1
Bend Coefficient (Kb): 1
Hydraulic Results
Depth [ft]: 0.603
Froude: 1.42
Project Information
Designers Name: Paul Stimpson
Designers Organization: LaBella Associates, PC
Project Number: 2211778
Project Segment: channel above point 7
Project Description:
Project Start Date: --
American
Excelsior
Company
RW
Earth Science Division
Left Manning's n-Value (Nl):.032
Right -Side Slope (Zr) [H:1 V]: 3
Bed Slope (S) [ft/ft]: 0.047
Design Discharge (Q) [ft'/s;c]: 5.96
Velocity [ft/sec]: 4.46
Shear [lb/ft']: 1.77
Designers Title: engineer
Project Name: Noland Farm
Project Location (City, State): Davidson County, North Carolina
Applications(s): channel stabilization
Project Bid Date: --
Mar 15th, 2022
WNW. ER QS I0N W0R its. C QM

Trapezoidal Channel Analysis
Project Info
User Input
Bed Manning's n-Value (Nc):.032
Right Manning's n-Value (Nr):.032
Left -Side Slope (ZI) [H:1 V]: 3
Bottom Width (B) [ft]:.1
Bend Coefficient (Kb): 1
Hydraulic Results
Depth [ft]: 0.444
Froude:1.23
Project Information
Designers Name: Paul Stimpson
Designers Organization: LaBella Associates, PC
Project Number: 2211778
Project Segment: channel above point 8
Project Description:
Project Start Date: --
American _
Excelsior
Company°
RW
Earth Science Division
Left Manning's n-Value (Nl):.032
Right -Side Slope (Zr) [H:1 V]: 4
Bed Slope (S) [ft/ft]: 0.039
Design Discharge (Q) [ft'/sec]: 2.44
Velocity [ft/sec]: 3.33
Shear [lb/ft']: 1.08
Designers Title: engineer
Project Name: Noland Farm
Project Location (City, State): Davidson County, North Carolina
Applications(s): channel stabilization
Project Bid Date: --
Mar 15th, 2022
WMEROSIOINWORKS.COM

Trapezoidal Channel Analysis
Project Info
User Input
Bed Manning's n-Value (Nc):.032
Right Manning's n-Value (Nr):.032
Left -Side Slope (ZI) [H:1V]: 4
Bottom Width (B) [ft]:.1
Bend Coefficient (Kb): 1
Hydraulic Results
Depth [ft]: 0.453
Froude: 1.22
Project Information
Designers Name: Paul Stimpson
Designers Organization: LaBella Associates, PC
Project Number: 2211778
Project Segment: channel above point 9
Project Description:
Project Start Date: --
American
Excelsior
Company
Earth Science Division
Left Manning's n-Value (Nl):.032
Right -Side Slope (Zr) [H:1 V]: 3
Bed Slope (S) [ft/ft]: 0.039
Design Discharge (Q) [ft'/sec]: 2.56
Velocity [ft/sec]: 3.36
Shear [lb/ftz]: 1.1
Designers Title: engineer
Project Name: Noland Farm
Project Location (City, State): Davidson County, North Carolina
Applications(s): channel stabilization
Project Bid Date: --
Mar 15th, 2022
WVWV.Ef105iQN CRK&COM

Trapezoidal Channel Analysis
Project Info
User Input
Bed Manning's n-Value (Nc):.032
Right Manning's n-Value (Nr):.032
Left -Side Slope (ZI) [H:1 V]: 3
Bottom Width (B) [ft]:.I
Bend Coefficient (Kb): 1
Hydraulic Results
Depth [ft]: 0.369
Froude: 1.4
Project Information
Designers Name: Paul Stimpson
Designers Organization: LaBella Associates, PC
Project Number: 2211778
Project Segment: channel about point 10
Project Description:
Project Start Date: --
American _
Excelsior
Com panyo
Earth Science Division
Left Manning's n-Value (NI):.032
Right -Side Slope (Zr) [H:1 V]: 4
Bed Slope (S) [ft/ft]: 0.054
Design Discharge (Q) [ft'/sec]: 1.79
A
0,s'0 (0,She-)
Velocity [ft/sec]: 3.48 0"
Shear [lb/ftz]: 1.24
Designers Title: engineer
Project Name: Noland Farm
Project Location (City, State): Davidson County, North Carolina
Applications(s): channel stabilization
Project Bid Date: --
Mar 15th, 2022
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Trapezoidal Channel Analysis
Project Info
User Input
Bed Manning's n-Value (Nc):.032
Right Manning's n-Value (Nr):.032
Left -Side Slope (ZI) [H:]V]: 3
Bottom Width (B) [ft]: 3
Bend Coefficient (Kb): 1.25
Hydraulic Results
Depth [ft]: 0.374 f/
Froude: 1.6
Project Information
Designers Name: Paul Stimpson
Designers Organization: LaBella Associates, PC
Project Number: 2211778
Project Segment: channel 11
Project Description:
Project Start Date: --
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American _
Excelsior
Com panyO
RW
Earth Science Division
Left Manning's n-Value (Nl):.032
Right -Side Slope (Zr) [H:1 V]: 3
Bed Slope (S) I t/tt]: 0.0588
Design Discharge (Q) [ft'/sec.l: 7.61 V
15 4:Y 4c)
Velocity [ft/sec]: 4.93
Shear [lb/ft']: 1.72
Designers Title: engineer
Project Name: Noland Farm
Project Location (City, State): Davidson County, North Carolina
Applications(s): channel stabilization
Project Bid Date: --
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Mar 16th, 2022 17
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AEC Premier Coconut
AEC Premier Straw DN QM (White Net)
AEC Premier Straw Double Net
AEC Premier Straw Single Net
AEC Premier Straw SN QM (White Net)
AEC Premier Straw/Coconut
Curlex Enforcer (Unvegetated)
Curlex Enforcer (Vegetated)
S� t✓ Curlex High Veloctt HV
Curlex I
Curlex I CL
Curlex I CL QuickMow (White Net)
Curlex I QuickMow (White Net)
Curlex II
Curlex II .98
Curlex II CL
Curlex II CL QuickMow (White Net)
Curlex II QuickMow (White Net)
Curlex III
Curlex NetFree
Recyclex TRM (Unvegetated)
Recyclex TRM (Vegetated)
Recyclex TRM-V (Unvegetated)
Recyclex TRM-V (Vegetated)
TriNet Coconut (Unvegetated)
TriNet Coconut (Vegetated)
TriNet Curlex (Unvegetated)
TriNet Curlex (Vegetated)
TriNet Recyclex (Unvegetated)
TriNet Recyclex (Vegetated)
TriNet Straw/Coconut (Unvegetated)
TriNet Straw/Coconut (Vegetated)
1.53
1.35
1.35
1.27
1.27
1.44
1.83
3.22
1.83
1.35
1.29
1.29
1.35
1.53
1.61
1.36
1.36
1.53
1.61
1.87
3.37
1.85
2.88
1.82
3.52
1.82
3.67
1.82
3.8
1.82
3.22
1.31
1.02
1 02
0.901
0 901
1.16
1.89
5.81
1.89
1.02
0.93
0.93
1.02
1.31
1.45
1.05
1.05
1.31
1.45
0.581
1.97
6.4
1.93
4.65
1.86
6.98
1.86
7.56
1 86
8.14
1.86
5.81
up to 36
Yes
i
up to 3
Yes
up to 12
Yes
up to 12
Yes
up to 3
Yes
up to 24
Yes
Permanent
Yes
Permanent
Yes
36+
Yes
up to 18
Yes
up to 15
Yes
up to 3
Yes
up to 3
Yes
up to 24
Yes
up to 30
N/A
up to 18
Yes
up to 3
Yes
up to 3
Yes
up to 36
Yes
up to 18
Permanent
Yes
Permanent
Yes
Permanent
Yes
Permanent
Yes
Permanent
Yes
Permanent
Yes
Permanent
Yes
Permanent
Yes
Premanent
Yes
Permanent
Yes
Permanent
Yes
Permanent
Yes
Mar 16th, 2022
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