SW4220503_Design Calculations_20220909

DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
Permanent Ditch Calcs
for
Cane Creek Phase 8
Waxwing Drive
Snow Camp, NC 27349
By:
C C
BATEMAN CIVIL SURVEY COMPANY
Engineer:
Tom Speight, PE
NCBELS # 20234
September 7, 2022
- 10 year
�y51�i11�}nIAR
�tiL+1% i +I
z , SEAL -
20234
'; ' �NG31i��F4��y4••
DocuSigned by:
ew�as S •
09838E23DC404AD...

DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
PERMANENT DIVERSION DITCH
TRACTIVE FORCE CALCULATIONS
SWALE #1
PROJECT : CANE CREEK
DATE : 05.27.22
DESIGNED BY: WKB
CHECKED BY: TSG
1'
BCSC
• .,.•.,
•=��f
BATEMAN CIVIL SURVEY COMPANY
Area =
3.33 (Acres)
Ca =
0.50 3.33 (Ac.)
Cb =
0.40 0.00 (Ac.) (Existing Residential)
Ccum =
0.50
Intensity =
5.09 (Inches / Hr)
Flow =
8.47 (CFS) 10 Yr. Intensity = 5.09 (in/hr) (Ditch Design)
DIMENSIONSCHANNEL - -
LINING:
N =
0.025 (Manning's 'n')
Slope =
0.059 (ft/ft)
Z Required =
0.59
M =
3 :1 (Side -Slope)
DIMENSIONS:
Channel Depth =
2.00 (ft) Normal Depth as Calculated
Flow Depth =
1.00 (ft) yn = 0.444
Bottom Width =
2 (ft.)
TRACTIVE FORCE:
T = Y*D*S
Tractive Force (lb./SF)
Y = Weight of Water (62.4 Ib./CF)
D = Depth of Flow (ft)
S = Longitudinal Slope (ft/ft)
T (calculated) =
3.7 (lb/SF)
Maximum Allowable Tractive Force
Product Options for Lining:
Tractive Force Resistance
Straw Net Single Blanket
1.50 (lb/SF)
Polyproplylene Turf Reinfoced Matting
2.25 (lb/SF)
Coconut Turf Renforced Matting
3.70 (lb/SF)
Class "B" Rip Rap
3.50 (lb/SF)
Class "I'Rip Rap
5.00 (lb/SF)
ERONET P300
8.00 (lb/SF)
Z ACTUAL:
Channel Flow Area =
7.00 (SF)
Wetted Perimeter =
8.32 (ft)
R =
0.84 (Dimensionless)
Z Actual =
6.24 Greater than or Equal to: 0.59 (Required from Above Calculation)
Velocity =
12.90 (ft/sec)
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 3.7 (OK)
Top of Channel Width:
14.00 ft
Channel Depth:
_ 2.00 ft
Flow Depth:
1.00 ft
Bottom of Channel Width:
2.00 ft

DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
SWALE #2 gATEMAN CIVIL SURVEY COMPANY
PERMANENT DIVERSION DITCH
��`''.. •�=�=� J
REEK
TRACTIVE FORCE CALCULATIONS
B C S C
Area = 0.61 (Acres)
Ca = 0.50 0.61 (Ac.)
Cb = 0.40 0.00 (Ac.) (Existing Residential)
Ccum = 0.50
Intensity = 5.09 (Inches / Hr) 2 Yr. Intensity = 3.53 (in/hr) (Liner Design)
Flow = 1.55 (CFS) 10 Yr. Intensity = 5.09 (in/hr) (Ditch Design)
CHANNEL • • • CRITERIA
LINING:
N = 0.033 (Manning's 'n')
Slope = 0.055 (ft/ft)
Z Required = 0.15
M = 3 :1 (Side -Slope)
DIMENSIONS:
Channel Depth = 2.00 (ft) Normal Depth as Calculated
Flow Depth = 0.90 (ft) yn = 0.444
Bottom Width = 2 (ft.)
TRACTIVE FORCE:
T = Y*D*S Tractive Force (lb./SF)
Y = Weight of Water (62.4 Ib./CF)
D = Depth of Flow (ft)
S = Longitudinal Slope (ft/ft)
T (calculated) = 3.1 (lb/SF)
Maximum Allowable Tractive Force
Product Options for Lining:
Tractive Force Resistance
Straw Net Single Blanket 1.50 (lb/SF)
Polyproplylene Turf Reinfoced Matting 2.25 (lb/SF)
Coconut Turf Renforced Matting 3.70 (lb/SF)
Class "B" Rip Rap 3.50 (lb/SF)
Class "I'Rip Rap 5.00 (lb/SF)
ERONET P300 8.00 (lb/SF)
Z ACTUAL:
Channel Flow Area = 6.43 (SF)
Wetted Perimeter = 7.69 (ft)
R = 0.84 (Dimensionless)
Z Actual = 5.71 Greater than or Equal to: 0.15 (Required from Above Calculation)
Velocity = 9.40 (ft/sec)
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 3.1 (OK)
Top of Channel Width:
14.00 ft
Channel Depth:
_ 2.00 ft
Flow Depth:
0.90 ft
Bottom of Channel Width:
2.00 ft
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 3.1 (OK)
Top of Channel Width:
14.00 ft
Channel Depth:
_ 2.00 ft
Flow Depth:
0.90 ft
Bottom of Channel Width:
2.00 ft

DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
PERMANENT DIVERSION DITCH
TRACTIVE FORCE CALCULATIONS`'' B C
S C
SWALE #3 •�=� J BATEMAN CIVIL SURVEY COMPANY
PROJECT : CANE CREEK
DATE : 05.27.22
DESIGNED BY: WKB
CHECKED BY: TSG
Area =
6.72 (Acres)
Ca =
0.50 6.73 (Ac.)
Cb =
0.40 0.00 (Ac.) (Existing Residential)
Ccum =
0.50
Intensity =
5.09 (Inches / Hr) 2 Yr. Intensity = 3.53 (in/hr) (Liner Design)
Flow =
17.10 (CFS) 10 Yr. Intensity = 5.09 (in/hr) (Ditch Design)
CHANNEL DIMENSIONS & DESIGN CRITERIA
LINING:
N =
0.033 (Manning's 'n')
Slope =
0.070 (ft/ft)
Z Required =
1.43
M =
2 :1 (Side -Slope)
DIMENSIONS:
Channel Depth =
3.00 (ft) Normal Depth as Calculated
Flow Depth =
1.15 (ft) yn = 0.444
Bottom Width =
0 (ft.)
TRACTIVE FORCE:
T = Y*D*S
Tractive Force (lb./SF)
Y = Weight of Water (62.4 Ib./CF)
D = Depth of Flow (ft)
S = Longitudinal Slope (ft/ft)
T (calculated) =
5.0 (lb/SF)
Maximum Allowable Tractive Force
Product Options for Lining:
Tractive Force Resistance
Straw Net Single Blanket
1.50 (lb/SF)
Polyproplylene Turf Reinfoced Matting
2.25 (lb/SF)
Coconut Turf Renforced Matting
3.70 (lb/SF)
Class "B" Rip Rap
3.50 (lb/SF)
Class "I'Rip Rap
5.00 (lb/SF)
ERONET P300
8.00 (lb/SF)
Z ACTUAL:
Channel Flow Area =
2.65 (SF)
Wetted Perimeter =
5.14 (ft)
R =
0.51 (Dimensionless)
Z Actual =
1.70 Greater than or Equal to: 1.43 (Required from Above Calculation)
Velocity =
7.67 (ft/sec)
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 5.0 (OK)
Top of Channel Width:
12.00 ft
Channel Depth:
_ 3.00 ft
Flow Depth:
1.15 ft
Bottom of Channel Width:
0.00 ft

DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
SWALE #4 gATEMAN CIVIL SURVEY COMPANY
PERMANENT DIVERSION DITCH
��`''.. •�=�=� J
REEK
TRACTIVE FORCE CALCULATIONS
B C S C
Area = 0.76 (Acres)
Ca = 0.50 0.76 (Ac.)
Cb = 0.40 0.00 (Ac.) (Existing Residential)
Ccum = 0.50
Intensity = 5.09 (Inches / Hr) 2 Yr. Intensity = 3.53 (in/hr) (Liner Design)
Flow = 1.93 (CFS) 10 Yr. Intensity = 5.09 (in/hr) (Ditch Design)
CHANNEL • • • CRITERIA
LINING:
N = 0.033 (Manning's 'n')
Slope = 0.100 (ft/ft)
Z Required = 0.14
M = 3 :1 (Side -Slope)
DIMENSIONS:
Channel Depth = 2.00 (ft) Normal Depth as Calculated
Flow Depth = 0.50 (ft) yn = 0.444
Bottom Width = 2 (ft.)
TRACTIVE FORCE:
T = Y*D*S Tractive Force (lb./SF)
Y = Weight of Water (62.4 Ib./CF)
D = Depth of Flow (ft)
S = Longitudinal Slope (ft/ft)
T (calculated) = 3.1 (lb/SF)
Maximum Allowable Tractive Force
Product Options for Lining:
Tractive Force Resistance
Straw Net Single Blanket 1.50 (lb/SF)
Polyproplylene Turf Reinfoced Matting 2.25 (lb/SF)
Coconut Turf Renforced Matting 3.70 (lb/SF)
Class "B" Rip Rap 3.50 (lb/SF)
Class "I'Rip Rap 5.00 (lb/SF)
ERONET P300 8.00 (lb/SF)
Z ACTUAL:
Channel Flow Area = 4.75 (SF)
Wetted Perimeter = 5.16 (ft)
R = 0.92 (Dimensionless)
Z Actual = 4.49 Greater than or Equal to: 0.14 (Required from Above Calculation)
Velocity = 13.51 (ft/sec)
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 3.1 (OK)
Top of Channel Width:
14.00 ft
Channel Depth:
_ 2.00 ft
Flow Depth:
0.50 ft
Bottom of Channel Width:
2.00 ft
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 3.1 (OK)
Top of Channel Width:
14.00 ft
Channel Depth:
_ 2.00 ft
Flow Depth:
0.50 ft
Bottom of Channel Width:
2.00 ft

DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
PERMANENT DIVERSION DITCH
TRACTIVE FORCE CALCULATIONS`'' B C
S C
SWALE #5 •�=� J BATEMAN CIVIL SURVEY COMPANY
PROJECT : CANE CREEK
DATE : 05.27.22
DESIGNED BY: WKB
CHECKED BY: TSG
Area =
7.06 (Acres)
Ca =
0.50 7.06 (Ac.)
Cb =
0.40 0.00 (Ac.) (Existing Residential)
Ccum =
0.50
Intensity =
5.09 (Inches / Hr) 2 Yr. Intensity = 3.53 (in/hr) (Liner Design)
Flow =
17.97 (CFS) 10 Yr. Intensity = 5.09 (in/hr) (Ditch Design)
CHANNEL DIMENSIONS & DESIGN CRITERIA
LINING:
N =
0.033 (Manning's 'n')
Slope =
0.055 (ft/ft)
Z Required =
1.70
M =
2 :1 (Side -Slope)
DIMENSIONS:
Channel Depth =
3.00 (ft) Normal Depth as Calculated
Flow Depth =
1.11 (ft) yn = 0.444
Bottom Width =
0 (ft.)
TRACTIVE FORCE:
T = Y*D*S
Tractive Force (lb./SF)
Y = Weight of Water (62.4 Ib./CF)
D = Depth of Flow (ft)
S = Longitudinal Slope (ft/ft)
T (calculated) =
3.8 (lb/SF)
Maximum Allowable Tractive Force
Product Options for Lining:
Tractive Force Resistance
Straw Net Single Blanket
1.50 (lb/SF)
Polyproplylene Turf Reinfoced Matting
2.25 (lb/SF)
Coconut Turf Renforced Matting
3.70 (lb/SF)
Class "B" Rip Rap
3.50 (lb/SF)
Class "I'Rip Rap
5.00 (lb/SF)
ERONET P300
8.00 (lb/SF)
Z ACTUAL:
Channel Flow Area =
2.46 (SF)
Wetted Perimeter =
4.96 (ft)
R =
0.50 (Dimensionless)
Z Actual =
1.54 Greater than or Equal to: 1.70 (Required from Above Calculation)
Velocity =
6.64 (ft/sec)
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 3.8 (OK)
Top of Channel Width:
12.00 ft
Channel Depth:
_ 3.00 ft
Flow Depth:
1.11 ft
Bottom of Channel Width:
0.00 ft

DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
PERMANENT DIVERSION DITCH
TRACTIVE FORCE CALCULATIONS`'' B C
S C
SWALE #6 •�=� J BATEMAN CIVIL SURVEY COMPANY
PROJECT : CANE CREEK
DATE : 05.27.22
DESIGNED BY: WKB
CHECKED BY: TSG
Area =
0.93 (Acres)
Ca =
0.50 0.93 (Ac.)
Cb =
0.40 0.00 (Ac.) (Existing Residential)
Ccum =
0.50
Intensity =
5.09 (Inches / Hr) 2 Yr. Intensity = 3.53 (in/hr) (Liner Design)
Flow =
2.37 (CFS) 10 Yr. Intensity = 5.09 (in/hr) (Ditch Design)
CHANNEL DIMENSIONS & DESIGN CRITERIA
LINING:
N =
0.033 (Manning's 'n')
Slope =
0.066 (ft/ft)
Z Required =
0.20
M =
3 :1 (Side -Slope)
DIMENSIONS:
Channel Depth =
2.00 (ft) Normal Depth as Calculated
Flow Depth =
1.00 (ft) yn = 0.444
Bottom Width =
2 (ft.)
TRACTIVE FORCE:
T = Y*D*S
Tractive Force (lb./SF)
Y = Weight of Water (62.4 Ib./CF)
D = Depth of Flow (ft)
S = Longitudinal Slope (ft/ft)
T (calculated) =
4.1 (lb/SF)
Maximum Allowable Tractive Force
Product Options for Lining:
Tractive Force Resistance
Straw Net Single Blanket
1.50 (lb/SF)
Polyproplylene Turf Reinfoced Matting
2.25 (lb/SF)
Coconut Turf Renforced Matting
3.70 (lb/SF)
Class "B" Rip Rap
3.50 (lb/SF)
Class "I'Rip Rap
5.00 (lb/SF)
ERONET P300
8.00 (lb/SF)
Z ACTUAL:
Channel Flow Area =
7.00 (SF)
Wetted Perimeter =
8.32 (ft)
R =
0.84 (Dimensionless)
Z Actual =
6.24 Greater than or Equal to: 0.20 (Required from Above Calculation)
Velocity =
10.33 (ft/sec)
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 4.1 (OK)
Top of Channel Width:
14.00 ft
Channel Depth:
_ 2.00 ft
Flow Depth:
1.00 ft
Bottom of Channel Width:
2.00 ft

DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
SWALE #7 gATEMAN CIVIL SURVEY COMPANY
PERMANENT DIVERSION DITCH
��`''.. •�=�=� J
REEK
TRACTIVE FORCE CALCULATIONS
B C S C
Area = 0.50 (Acres)
Ca = 0.50 0.50 (Ac.)
Cb = 0.40 0.00 (Ac.) (Existing Residential)
Ccum = 0.50
Intensity = 5.09 (Inches / Hr) 2 Yr. Intensity = 3.53 (in/hr) (Liner Design)
Flow = 1.27 (CFS) 10 Yr. Intensity = 5.09 (in/hr) (Ditch Design)
CHANNEL • • • CRITERIA
LINING:
N = 0.033 (Manning's 'n')
Slope = 0.067 (ft/ft)
Z Required = 0.11
M = 3 :1 (Side -Slope)
DIMENSIONS:
Channel Depth = 2.00 (ft) Normal Depth as Calculated
Flow Depth = 0.80 (ft) yn = 0.444
Bottom Width = 2 (ft.)
TRACTIVE FORCE:
T = Y*D*S Tractive Force (lb./SF)
Y = Weight of Water (62.4 Ib./CF)
D = Depth of Flow (ft)
S = Longitudinal Slope (ft/ft)
T (calculated) = 3.3 (lb/SF)
Maximum Allowable Tractive Force
Product Options for Lining:
Tractive Force Resistance
Straw Net Single Blanket 1.50 (lb/SF)
Polyproplylene Turf Reinfoced Matting 2.25 (lb/SF)
Coconut Turf Renforced Matting 3.70 (lb/SF)
Class "B" Rip Rap 3.50 (lb/SF)
Class "I'Rip Rap 5.00 (lb/SF)
ERONET P300 8.00 (lb/SF)
Z ACTUAL:
Channel Flow Area = 5.92 (SF)
Wetted Perimeter = 7.06 (ft)
R = 0.84 (Dimensionless)
Z Actual = 5.26 Greater than or Equal to: 0.11 (Required from Above Calculation)
Velocity = 10.39 (ft/sec)
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 3.3 (OK)
Top of Channel Width:
14.00 ft
Channel Depth:
_ 2.00 ft
Flow Depth:
0.80 ft
Bottom of Channel Width:
2.00 ft
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 3.3 (OK)
Top of Channel Width:
14.00 ft
Channel Depth:
_ 2.00 ft
Flow Depth:
0.80 ft
Bottom of Channel Width:
2.00 ft

DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
PERMANENT DIVERSION DITCH
TRACTIVE FORCE CALCULATIONS`'' B C
S C
SWALE #8 •�=� J BATEMAN CIVIL SURVEY COMPANY
PROJECT : CANE CREEK
DATE : 05.27.22
DESIGNED BY: WKB
CHECKED BY: TSG
Area =
1.10 (Acres)
Ca =
0.50 1.10 (Ac.)
Cb =
0.40 0.00 (Ac.) (Existing Residential)
Ccum =
0.50
Intensity =
5.09 (Inches / Hr) 2 Yr. Intensity = 3.53 (in/hr) (Liner Design)
Flow =
2.80 (CFS) 10 Yr. Intensity = 5.09 (in/hr) (Ditch Design)
CHANNEL DIMENSIONS & DESIGN CRITERIA
LINING:
N =
0.033 (Manning's 'n')
Slope =
0.050 (ft/ft)
Z Required =
0.28
M =
3 :1 (Side -Slope)
DIMENSIONS:
Channel Depth =
2.00 (ft) Normal Depth as Calculated
Flow Depth =
0.85 (ft) yn = 0.444
Bottom Width =
2 (ft.)
TRACTIVE FORCE:
T = Y*D*S
Tractive Force (lb./SF)
Y = Weight of Water (62.4 Ib./CF)
D = Depth of Flow (ft)
S = Longitudinal Slope (ft/ft)
T (calculated) =
2.7 (lb/SF)
Maximum Allowable Tractive Force
Product Options for Lining:
Tractive Force Resistance
Straw Net Single Blanket
1.50 (lb/SF)
Polyproplylene Turf Reinfoced Matting
2.25 (lb/SF)
Coconut Turf Renforced Matting
3.70 (lb/SF)
Class "B" Rip Rap
3.50 (lb/SF)
Class "I'Rip Rap
5.00 (lb/SF)
ERONET P300
8.00 (lb/SF)
Z ACTUAL:
Channel Flow Area =
6.17 (SF)
Wetted Perimeter =
7.38 (ft)
R =
0.84 (Dimensionless)
Z Actual =
5.47 Greater than or Equal to: 0.28 (Required from Above Calculation)
Velocity =
8.96 (ft/sec)
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 2.7 (OK)
Top of Channel Width:
14.00 ft
Channel Depth:
_ 2.00 ft
Flow Depth:
0.85 ft
Bottom of Channel Width:
2.00 ft

DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
PERMANENT DIVERSION DITCH
TRACTIVE FORCE CALCULATIONS`'' B C
S C
SWALE #9 •�=� J BATEMAN CIVIL SURVEY COMPANY
PROJECT : CANE CREEK
DATE : 05.27.22
DESIGNED BY: WKB
CHECKED BY: TSG
Area =
0.34 (Acres)
Ca =
0.50 0.34 (Ac.)
Cb =
0.40 0.00 (Ac.) (Existing Residential)
Ccum =
0.50
Intensity =
5.09 (Inches / Hr) 2 Yr. Intensity = 3.53 (in/hr) (Liner Design)
Flow =
0.87 (CFS) 10 Yr. Intensity = 5.09 (in/hr) (Ditch Design)
CHANNEL DIMENSIONS & DESIGN CRITERIA
LINING:
N =
0.033 (Manning's 'n')
Slope =
0.034 (ft/ft)
Z Required =
0.10
M =
3 :1 (Side -Slope)
DIMENSIONS:
Channel Depth =
2.00 (ft) Normal Depth as Calculated
Flow Depth =
0.85 (ft) yn = 0.444
Bottom Width =
2 (ft.)
TRACTIVE FORCE:
T = Y*D*S
Tractive Force (lb./SF)
Y = Weight of Water (62.4 Ib./CF)
D = Depth of Flow (ft)
S = Longitudinal Slope (ft/ft)
T (calculated) =
1.8 (lb/SF)
Maximum Allowable Tractive Force
Product Options for Lining:
Tractive Force Resistance
Straw Net Single Blanket
1.50 (lb/SF)
Polyproplylene Turf Reinfoced Matting
2.25 (lb/SF)
Coconut Turf Renforced Matting
3.70 (lb/SF)
Class "B" Rip Rap
3.50 (lb/SF)
Class "I'Rip Rap
5.00 (lb/SF)
ERONET P300
8.00 (lb/SF)
Z ACTUAL:
Channel Flow Area =
6.17 (SF)
Wetted Perimeter =
7.38 (ft)
R =
0.84 (Dimensionless)
Z Actual =
5.47 Greater than or Equal to: 0.10 (Required from Above Calculation)
Velocity =
7.39 (ft/sec)
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 1.8 (OK)
Top of Channel Width:
14.00 ft
Channel Depth:
_ 2.00 ft
Flow Depth:
0.85 ft
Bottom of Channel Width:
2.00 ft

DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
SWALE #10 gATEMAN CIVIL SURVEY COMPANY
PERMANENT DIVERSION DITCH
��`''.. •�=�-� J
REEK
TRACTIVE FORCE CALCULATIONS
B C S C
Area = 0.48 (Acres)
Ca = 0.50 0.48 (Ac.)
Cb = 0.40 0.00 (Ac.) (Existing Residential)
Ccum = 0.50
Intensity = 5.09 (Inches / Hr) 2 Yr. Intensity = 3.53 (in/hr) (Liner Design)
Flow = 1.22 (CFS) 10 Yr. Intensity = 5.09 (in/hr) (Ditch Design)
CHANNEL • • • CRITERIA
LINING:
N = 0.033 (Manning's 'n')
Slope = 0.034 (ft/ft)
Z Required = 0.15
M = 3 :1 (Side -Slope)
DIMENSIONS:
Channel Depth = 2.00 (ft) Normal Depth as Calculated
Flow Depth = 0.75 (ft) yn = 0.444
Bottom Width = 2 (ft.)
TRACTIVE FORCE:
T = Y*D*S Tractive Force (lb./SF)
Y = Weight of Water (62.4 Ib./CF)
D = Depth of Flow (ft)
S = Longitudinal Slope (ft/ft)
T (calculated) = 1.6 (lb/SF)
Maximum Allowable Tractive Force
Product Options for Lining:
Tractive Force Resistance
Straw Net Single Blanket 1.50 (lb/SF)
Polyproplylene Turf Reinfoced Matting 2.25 (lb/SF)
Coconut Turf Renforced Matting 3.70 (lb/SF)
Class "B" Rip Rap 3.50 (lb/SF)
Class "I'Rip Rap 5.00 (lb/SF)
ERONET P300 8.00 (lb/SF)
Z ACTUAL:
Channel Flow Area = 5.69 (SF)
Wetted Perimeter = 6.74 (ft)
R = 0.84 (Dimensionless)
Z Actual = 5.08 Greater than or Equal to: 0.15 (Required from Above Calculation)
Velocity = 7.43 (ft/sec)
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 1.6 (OK)
Top of Channel Width:
14.00 ft
Channel Depth:
_ 2.00 ft
Flow Depth:
0.75 ft
Bottom of Channel Width:
2.00 ft
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 1.6 (OK)
Top of Channel Width:
14.00 ft
Channel Depth:
_ 2.00 ft
Flow Depth:
0.75 ft
Bottom of Channel Width:
2.00 ft

DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
PERMANENT DIVERSION DITCH
TRACTIVE FORCE CALCULATIONS`'' B C
S C
SWALE #11 •�=�-� J BATEMAN CIVIL SURVEY COMPANY
PROJECT : CANE CREEK
DATE : 05.27.22
DESIGNED BY: WKB
CHECKED BY: TSG
Area =
0.34 (Acres)
Ca =
0.50 0.33 (Ac.)
Cb =
0.40 0.01 (Ac.) (Existing Residential)
Ccum =
0.50
Intensity =
5.09 (Inches / Hr) 2 Yr. Intensity = 3.53 (in/hr) (Liner Design)
Flow =
0.86 (CFS) 10 Yr. Intensity = 5.09 (in/hr) (Ditch Design)
CHANNEL DIMENSIONS & DESIGN CRITERIA
LINING:
N =
0.033 (Manning's 'n')
Slope =
0.034 (ft/ft)
Z Required =
0.10
M =
3 :1 (Side -Slope)
DIMENSIONS:
Channel Depth =
2.00 (ft) Normal Depth as Calculated
Flow Depth =
0.70 (ft) yn = 0.444
Bottom Width =
2 (ft.)
TRACTIVE FORCE:
T = Y*D*S
Tractive Force (lb./SF)
Y = Weight of Water (62.4 Ib./CF)
D = Depth of Flow (ft)
S = Longitudinal Slope (ft/ft)
T (calculated) =
1.5 (lb/SF)
Maximum Allowable Tractive Force
Product Options for Lining:
Tractive Force Resistance
Straw Net Single Blanket
1.50 (lb/SF)
Polyproplylene Turf Reinfoced Matting
2.25 (lb/SF)
Coconut Turf Renforced Matting
3.70 (lb/SF)
Class "B" Rip Rap
3.50 (lb/SF)
Class "I'Rip Rap
5.00 (lb/SF)
ERONET P300
8.00 (lb/SF)
Z ACTUAL:
Channel Flow Area =
5.47 (SF)
Wetted Perimeter =
6.43 (ft)
R =
0.85 (Dimensionless)
Z Actual =
4.91 Greater than or Equal to: 0.10 (Required from Above Calculation)
Velocity =
7.48 (ft/sec)
SECTIONCHANNEL
Check:
Lining: ERONET P300 8.00 (lb/SF) > 1.5 (OK)
Top of Channel Width:
14.00 ft
Channel Depth:
_ 2.00 ft
Flow Depth:
0.70 ft
Bottom of Channel Width:
2.00 ft

DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
CANE CREEK
Permanent Diversion Ditch Summary Index Table
gyp/9■�fi�
� �
c
- � �
�
- • - � �
� �
iYJF'I�iii�7

Precipitation Frequency Data Server
http s: //hdsc.nws.noaa. gov/hdsc/pfds/pfds_printpage. html'?lat=3 5. 8 894...
NOAA Atlas 14, Volume 2, Version 3
Location name: Snow Camp, North Carolina, USA* oe
Latitude: 35.8894', Longitude:-79.3319*
Elevation: 506.85 ft**
source: ESRI Maps pr
,< source: USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M. Bonnin, D. Martin, B. Lin, T. Parzybok, M.Yekta, and D. Riley
NOAA, National Weather Service, Silver Spring, Maryland
PF tabular I PF_graphical I Maps_&_aerials
PF tabular
PDS-based
point precipitation frequency estimates with 90% confidence intervals (in inches)'
Average
recurrence interval (years)
Duration
1
2
5
10
25
50
1 100
00
200
500
1000
0.406
0.481
0.559
0.611
0.668
0.704
0.737
0.763
0.790
0.807
5-min
(0.371-0.444)
(0.440-0.527)
(0.510-0.611)
(0.557-0.668)
(0.606-0.729)
(0.637-0.769)
(0.663-0.805)
(0.683-0.834)
(0.701-0.863)
(0.711-0.883)
0.648
0.769
0.894
0.977
1.06
1.12
1.17
1.21
1.25
1.27
10-min
(0.592-0.709)
(0.704-0.843)
(0.817-0.979)
(0.891-1.07)
(0.966-1.16)
(1.01-1.22)
( 1.05-1.28)
( 1.08-1.32)
( 1.11-1.37)
( 1.12-1.39)
0.810
0.967
1.13
1.24
1.35
1.42
1.43
1.53
1.57
1.60
15-min
(0.740-0.887)
(0.885-1.06)
1 (1.03-1.24)
1 (1.13-1.35)
1 (1.22-1.47)
1 (1.29-1.55)
1 (1.33-1.62)
1 (1.37-1.67)
1 (1.40-1.72)
1 (1.41-1.75)
1.11
1.34
1.61
1.79
2.00
2.14
2.27
2.38
2.50
2.58
30-min
(1 .01-1.22)
(1.22-1.46)
(1.47-1.76)
(1.63-1.96)
(1.81-2.18)
(1.94-2.34)
(2.04-2.48)
(2.13-2.60)
(2.22-2.73)
(2.28-2.83)
1.39
1.68
2.06
2.33
2.66
2.90
3.12
3.33
3.59
3.77
60-min
(1.26-1.52)
(1.53-1.84)
(1.88-2.26)
(2.13-2.55)
(2.42-2.91)
(2.62-3.16)
(2.81-3.41)
(2.98-3.64)
(3.19-3.92)
(3.32-4.13)
1.64
1.99
2.47
2.82
3.26
3.59
3.91
4.22
4.61
4.91
2-hr
(1.50-1.81)
(1.82-2.19)
(2.26-2.71)
(2.56-3.09)
(2.95-3.57)
(3.23-3.93)
(3.49-4.28)
(3.74-4.61)
(4.05-5.05)
(4.27-5.38)
1.76
2.13
2.65
3.03
3.53
3.90
4.27
4.64
5.13
5.49
3-hr
(1.61-1.92)
1 (2.42-2.90)
1 (2.77-3.31)
(3.19-3.85)
(3.52-4.26)
(3.82-4.66)
(4.12-5.06)
(4.49-5.59)
(4.77-6.00)
2.12
2.56
3.19
3.66
4.30
4.79
5.29
5.79
6.47
6.99
6-hr
(1.95-2.32)
(2.36-2.80)
(2.92-3.48)
(3.35-3.99)
(3.90-4.67)
(4.32-5.20)
(4.73-5.74)
(5.12-6.28)
(5.64-7.02)
(6.02-7.60)
2.51
3.04
3.78
4.39
5.21
5.85
6.52
7.22
8.19
8.96
12-hr
2
( .31-2.74)
(2.80-3.32)
(3.48-4.15)
(4.01-4.79)
(4.72-5.65)
(5.26-6.34)
(5.81-7.06)
(6.36-7.80)
(7.08-8.85)
(7.62-9.68)
24-hr
2.93
(2.74-3.13)
3.53
(3.31-3.78)
4.41
(4.12-4.71)
�
6.01
5.58-6.44)
6.73
(6.24-7.22)
7.47
(6.91-8.03)
8.23
(7.58-8.86)
9.27
(8.49-10.0)
10.1
(9.20-10.9)
3.42
4.12F
5.10
5.84
6.85
7.63
8.42
9.23
10.3
11.2
2-day
(3.21-3.66)
(3.86-4.41)
(4.77-5.46)
(5.46-6.26)
(6.37-7.34)
( 7.08-8.19)
( 7.79-9.06)
(8.50-9.96)
(9.46-11.2)
( 10.2-12.1)
3.62
4.35
5.37
6.15
7.20
8.03
8.87
9.73
10.9
11.8
3-day
(3.40-3.88)
(4.08-4.66)
(5.02-5.74)
(5.74-6.58)
(6.70-7.72)
(7.44-8.61)
(8.19-9.53)
(8.95-10.5)
(9.97-11.8)
(10.8-12.8)
3.83
4.59
5.63
6.45
7.56
8.42
9.31
10.2
11.5
12.4
4-day
(3.59-4.09)
(4.30-4.90)
(5.27-6.02)
(6.03-6.90)
(7.03-8.09)
(7.81-9.03)
(8.60-10.0)
(9.40-11.0)
(10.5-12.4)
(11.3-13.5)
4.39
6.34
7.22
8.41
9.36
10.3
11.3
12.6
13.7
7-day
(4.13-4.68)
(4.92-5.57)
(5.97-6.76)
(6.79-7.70)
(7.88-8.98)
(8.73-10.0)
(9.59-11.0)
(10.5-12.1)
(11.6-13.6)
(12.5-14.8)
4.98
5.92
7.10
8.03
9.28
10.3
11.3
12.3
13.6
14.7
10-day
(4.70-5.30)
(5.59-6.30)
(6.69-7.56)
(7.56-8.55)
(8.70-9.89)
(9.59-10.9)
(10.5-12.0)
(11.4-13.1)
(12.6-14.7)
(13.5-15.9)
6.67
7.86
9.28
10.4
12.0
13.2
14.4
15.7
17.4
18.7
20-day
(6.30-7.05)
(7.44-8.31)
(8.77-9.81)
(9.83-11.0)
(11.2-12.7)
( 12.3-14.0)
(13.4-15.3)
(14.5-16.7)
( 16.0-18.6)
(17.2-20.1)
8.27
9.73
11.3
12.5
14.1
15.4
16.6
17.8
19.5
20.7
30-day
(7.87-8.73)
(9.24-10.2)
(10.7-11.9)
(11.9-13.2)
(13.4-14.9)
(14.5-16.2)
(15.6-17.5)
(16.7-18.9)
(18.2-20.7)
(19.3-22.1)
10.5
12.3
14.1
15.5
17.3
18.7
20.0
21.4
23.2
24.6
45-day
(100-11.1)
(11.7-12.9)
(13.4-14.8)
(14.7-16.2)
(16.4-18.1)
(17.7-19.6)
(18.9-21.1)
1 (20.1-22.6)
1 (21.7-24.6)
1 (22.9-26.1)
12.6
14.7
16.6
18.0
19.9
21.3
22.6
23.9
25.6
26.9
60-day
(121-13.2)
(14.1-15.4)
(15.9-17.4)
(17.2-18.9)
(19.0-20.8)
(20.3-22.3)
(21.5-23.8)
(22.7-25.2)
(24.2-27.0)
(25.4-28.4)
Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90 % confidence interval. The probability that precipitation frequency estimates
(for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds
are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more information.
Back to Top
PF graphical
1 of 4 8/31/2022, 1:05 PM

Precipitation Frequency Data Server https:Hhdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=35.8894...
DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
PDS-based depth -duration -frequency (DDF) curves
Latitude: 35_$$94 Longitude:-79.3319'
91
25
20
d
15
49
.a
10
CL
a
5
rl
' 'E 'E L L L L L rq rq N N N r4 N M M
N A lb N � U � �ll � � � � -0-0
u� O u'•i O O '"� ['V N �S q r� 0 O O u"i O
fnn 40 r-I N P'1
Duration
IN
25
C
r 20
4-
d
c
15
CL
�-j 10
Pi
a
5
0� T I I I I I I I I
1 2 5 10 25 50 100 200 500 1000
Average recurrence interval (years)
NOAA Atlas 14, Wolume 2, Version 3 Created {GMTY Wed Aug 31 17:05:24 2022
Back to Top
Maps & aerials
Small scale terrain
Average recurrence
interval
(years)
— 1
2
— 5
— 1Q
25
50
100
200
500
10Q0
5-frnn
— 2-day
— I Q-mm
— 3-day
15�nm
— 4-day
30-min
— 7-day
— 60-rnin
— 10-day
— 2-hr
— 20-day
— 3-hr
— 30-day
— 6-hr
— 45-day
— 12-hr
— 60-day
24-hr
2of4
8/31/2022, 1:05 PM

Precipitation Frequency Data Server https:Hhdsc.nws.noaa.gov/hdsc/pfds/Pfds_piintpage.html?lat=3 5.8894...
DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB1 2BD66EA
Large scale terrain
Blackdl)ui�,
Roanoke
Winston-Salem
Durham
�aleigh
RTH C A R 0 L I N A
Large scale map
instanalem Greensboro
Durha
—7T ni Rocky MOUF
' Raleigh
Gree
North Q
Carolina
arlotte
IF etteville
u
100km
Jack:
—trni u
Large scale aerial
3 of 4 8/31/2022,1:05 PM

Precipitation Frequency Data Server https:Hhdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=35.8894...
DocuSign Envelope ID: 8BCF71 FB-66B3-4F5F-A569-3ADB12BD66EA
Back to Top
US Department of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
National Water Center
1325 East West Highway
Silver Spring, MD 20910
Questions?: [e-mail]
Disclaimer
4 of 4 8/31/2022, 1:05 PM