SW6240805_Design Calculations (Swale)_20241016

4D Site Solutions, Inc.
DITCH CALCULATIONS
NOTE:sheet only set up to handle Tc from 5 min to 30 min
A. Flow velocity<2.0 fps when discharging to wetlands B. Flow velocity<4.5 fps all other cases** C. Channel slope<5.0%for curb outlet swales
1753-Spell Estates Subdivision
Rainfall Intensity
Storm Event
5-min 10-min 15-min 30-min Runoff Coeff.
10-yr 7.88 6.31 5.32 3.86 Impervious 0.90
25-yr 8.88 7.07 5.98 4.43 Grassed 0.15
50-yr 9.56 7.61 6.43 4.84
100-yr 10.20 8.13 6.85 5.25
Tc
Drainage Impervious Grassed Storm Rainfall
Ditch No. C Kerby Kirpich Intensity Q(cfs)
Area(ac) Area(ac) Area(ac) Event(yr)
Total Tc Tc Used (in/hr)
L(ft) n s Toy L(ft) S Tet,
1 1.51 0.50 1.01 0.40 n/a n/a 0.00 5 10-yr 7.29 4.40
2 2.09 0.68 1.41 0.39 n/a n/a 0.00 5 10-yr 7.29 5.98
3 0.87 0.36 0.51 0.46 n/a n/a 0.00 5 10-yr 7.29 2.93
4 3.27 0.47 2.80 0.26 n/a n/a 0.00 5 10-yr 7.29 6.12
5 2.74 0.00 2.74 0.15 n/a 1493.0 0.011 12.31 12.31 10 10-yr 6.00 2.47
6 0.84 0.11 0.73 0.25 n/a 1385.0 0.010 12.05 12.05 10 10-yr 6.00 1.26
7 2.54 0.86 1.68 0.40 n/a n/a 0.00 5 10-yr 7.29 7.48
8 1.41 0.49 0.92 0.41 n/a n/a 0.00 5 10-yr 7.29 4.23
printed: 8/29/2024 1:16 PM Page 1 of 1

8/14/24,6:26 AM ECMDS 7.0
ElNORTH North American Green
AMERICAN 5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
GREEN Tel. [phone]
>Fax [phone]
www.nagreen.com
ECMDS v7.0
CHANNEL ANALYSIS
>>>DITCH 1
Name DITCH 1
Discharge 4.4
Channel Slope 0.002
Channel Bottom Width 2
Left Side Slope 3
Right Side Slope 3
Low Flow Liner
Retardence Class C 6-12 in
Vegetation Type Mix(Sod and Bunch)
Vegetation Density Good 65-79%
Soil Type Sandy Loam(GM)
S75
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
S75 Unvegetated Straight 4.4 cfs 1.04 ft/s 0.9 ft 0.043 1.6 lbs/ft2 0.11 lbs/ft2 14.27 STABLE D
Underlying Straight 4.4 cfs 1.04 ft/s 0.9 ft 0.043 1.51 Ibs/ft2 0.07 Ibs/ft2 22.1 STABLE D
Substrate
Unreinforced Vegetation
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 4.4 cfs 0.49 ft/s 1.42 ft 0.117 4 lbs/ft2 0.18 Ibs/ft2 22.54 STABLE --
Vegetation
Underlying Straight 4.4 cfs 0.49 ft/s 1.42 ft 0.117 4 Ibs/ft2 0.1 lbs/ft2 39.55 STABLE --
Substrate
https://ecmds.com/project/161817/channel-analysis/271515/show 1/1

8/14/24,6:27 AM ECMDS 7.0
ElNORTH North American Green
AMERICAN 5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
GREEN Tel. [phone]
>Fax [phone]
www.nagreen.com
ECMDS v7.0
CHANNEL ANALYSIS
>>>DITCH 2
Name DITCH 2
Discharge 5.98
Channel Slope 0.0044
Channel Bottom Width 2
Left Side Slope 3
Right Side Slope 3
Low Flow Liner
Retardence Class C 6-12 in
Vegetation Type Mix(Sod and Bunch)
Vegetation Density Good 65-79%
Soil Type Sandy Loam(GM)
S75
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
S75 Unvegetated Straight 5.98 cfs 1.62 ft/s 0.82 ft 0.039 1.6 lbs/ft2 0.23 lbs/ft2 7.06 STABLE D
Underlying Straight 5.98 cfs 1.62 ft/s 0.82 ft 0.039 1.51 Ibs/ft2 0.14 Ibs/ft2 10.79 STABLE D
Substrate
Unreinforced Vegetation
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 5.98 cfs 0.87 ft/s 1.22 ft 0.09 4 lbs/ft2 0.33 lbs/ft2 11.97 STABLE --
Vegetation
Underlying Straight 5.98 cfs 0.87 ft/s 1.22 ft 0.09 4 Ibs/ft2 0.19 Ibs/ft2 20.54 STABLE --
Substrate
https://ecmds.com/project/161817/channel-analysis/271517/show 1/1

8/14/24,6:27 AM ECMDS 7.0
ElNORTH North American Green
AMERICAN 5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
GREEN Tel. [phone]
>Fax [phone]
www.nagreen.com
ECMDS v7.0
CHANNEL ANALYSIS
>>>DITCH 3
Name DITCH 3
Discharge 2.93
Channel Slope 0.003
Channel Bottom Width 2
Left Side Slope 3
Right Side Slope 3
Low Flow Liner
Retardence Class C 6-12 in
Vegetation Type Mix(Sod and Bunch)
Vegetation Density Good 65-79%
Soil Type Sandy Loam(GM)
S75
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
S75 Unvegetated Straight 2.93 cfs 1.1 ft/s 0.66 ft 0.042 1.6 lbs/ft2 0.12 lbs/ft2 12.86 STABLE D
Underlying Straight 2.93 cfs 1.1 ft/s 0.66 ft 0.042 1.51 Ibs/ft2 0.08 Ibs/ft2 18.91 STABLE D
Substrate
Unreinforced Vegetation
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 2.93 cfs 0.54 ft/s 1.05 ft 0.11 4 lbs/ft2 0.2 Ibs/ft2 20.31 STABLE --
Vegetation
Underlying Straight 2.93 cfs 0.54 ft/s 1.05 ft 0.11 4 Ibs/ft2 0.12 Ibs/ft2 34.09 STABLE --
Substrate
https://ecmds.com/project/161817/channel-analysis/271519/show 1/1

8/14/24,6:28 AM ECMDS 7.0
ElNORTH North American Green
AMERICAN 5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
GREEN Tel. [phone]
>Fax [phone]
www.nagreen.com
ECMDS v7.0
CHANNEL ANALYSIS
>>>DITCH 4
Name DITCH 4
Discharge 6.12
Channel Slope 0.0041
Channel Bottom Width 2
Left Side Slope 3
Right Side Slope 3
Low Flow Liner
Retardence Class C 6-12 in
Vegetation Type Mix(Sod and Bunch)
Vegetation Density Good 65-79%
Soil Type Sandy Loam(GM)
S75
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
S75 Unvegetated Straight 6.12 cfs 1.58 ft/s 0.85 ft 0.039 1.6 lbs/ft2 0.22 lbs/ft2 7.36 STABLE D
Underlying Straight 6.12 cfs 1.58 ft/s 0.85 ft 0.039 1.51 Ibs/ft2 0.13 Ibs/ft2 11.29 STABLE D
Substrate
Unreinforced Vegetation
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 6.12 cfs 0.84 ft/s 1.26 ft 0.092 4 lbs/ft2 0.32 lbs/ft2 12.42 STABLE --
Vegetation
Underlying Straight 6.12 cfs 0.84 ft/s 1.26 ft 0.092 4 Ibs/ft2 0.19 Ibs/ft2 21.42 STABLE --
Substrate
https://ecmds.com/project/161817/channel-analysis/271520/show 1/1

8/14/24,6:28 AM ECMDS 7.0
ElNORTH North American Green
AMERICAN 5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
GREEN Tel. [phone]
>Fax [phone]
www.nagreen.com
ECMDS v7.0
CHANNEL ANALYSIS
>>>DITCH 5
Name DITCH 5
Discharge 2.47
Channel Slope 0.0041
Channel Bottom Width 2
Left Side Slope 3
Right Side Slope 3
Low Flow Liner
Retardence Class C 6-12 in
Vegetation Type Mix(Sod and Bunch)
Vegetation Density Good 65-79%
Soil Type Sandy Loam(GM)
S75
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
S75 Unvegetated Straight 2.47 cfs 1.2 ft/s 0.56 ft 0.041 1.6 lbs/ft2 0.14 lbs/ft2 11.2 STABLE D
Underlying Straight 2.47 cfs 1.2 ft/s 0.56 ft 0.041 1.51 Ibs/ft2 0.09 Ibs/ft2 15.96 STABLE D
Substrate
Unreinforced Vegetation
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 2.47 cfs 0.61 ft/s 0.88 ft 0.104 4 lbs/ft2 0.22 Ibs/ft2 17.83 STABLE --
Vegetation
Underlying Straight 2.47 cfs 0.61 ft/s 0.88 ft 0.104 4 Ibs/ft2 0.14 Ibs/ft2 29.06 STABLE --
Substrate
https://ecmds.com/project/161817/channel-analysis/271521/show 1/1

8/14/24,6:28 AM ECMDS 7.0
ElNORTH North American Green
AMERICAN 5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
GREEN Tel. [phone]
>Fax [phone]
www.nagreen.com
ECMDS v7.0
CHANNEL ANALYSIS
>>>DITCH 6
Name DITCH 6
Discharge 1.26
Channel Slope 0.0048
Channel Bottom Width 2
Left Side Slope 3
Right Side Slope 3
Low Flow Liner
Retardence Class C 6-12 in
Vegetation Type Mix(Sod and Bunch)
Vegetation Density Good 65-79%
Soil Type Sandy Loam(GM)
S75
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
S75 Unvegetated Straight 1.26 cfs 1.04 ft/s 0.38 ft 0.042 1.6 lbs/ft2 0.12 lbs/ft2 13.91 STABLE D
Underlying Straight 1.26 cfs 1.04 ft/s 0.38 ft 0.042 1.51 Ibs/ft2 0.08 Ibs/ft2 18.5 STABLE D
Substrate
Unreinforced Vegetation
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 1.26 cfs 0.52 ft/s 0.63 ft 0.109 4 lbs/ft2 0.19 lbs/ft2 21.37 STABLE --
Vegetation
Underlying Straight 1.26 cfs 0.52 ft/s 0.63 ft 0.109 4 Ibs/ft2 0.12 Ibs/ft2 32.82 STABLE --
Substrate
https://ecmds.com/project/161817/channel-analysis/271522/show 1/1

8/14/24,6:29 AM ECMDS 7.0
ElNORTH North American Green
AMERICAN 5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
GREEN Tel. [phone]
>Fax [phone]
www.nagreen.com
ECMDS v7.0
CHANNEL ANALYSIS
>>>DITCH 7
Name DITCH 7
Discharge 7.48
Channel Slope 0.0041
Channel Bottom Width 2
Left Side Slope 3
Right Side Slope 3
Low Flow Liner
Retardence Class C 6-12 in
Vegetation Type Mix(Sod and Bunch)
Vegetation Density Good 65-79%
Soil Type Sandy Loam(GM)
S75
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
S75 Unvegetated Straight 7.48 cfs 1.68 ft/s 0.93 ft 0.039 1.6 lbs/ft2 0.24 lbs/ft2 6.72 STABLE D
Underlying Straight 7.48 cfs 1.68 ft/s 0.93 ft 0.039 1.51 Ibs/ft2 0.14 Ibs/ft2 10.48 STABLE D
Substrate
Unreinforced Vegetation
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 7.48 cfs 0.9 ft/s 1.36 ft 0.089 4 lbs/ft2 0.35 lbs/ft2 11.49 STABLE --
Vegetation
Underlying Straight 7.48 cfs 0.9 ft/s 1.36 ft 0.089 4 Ibs/ft2 0.2 Ibs/ft2 20.04 STABLE --
Substrate
https://ecmds.com/project/161817/channel-analysis/271523/show 1/1

8/14/24,6:30 AM ECMDS 7.0
NORTH North American Green
AMERICAN 5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
GREEN Tel. [phone]
>Fax [phone]
www.nagreen.com
ECMDS v7.0
CHANNEL ANALYSIS
>>>DITCH 8
Name DITCH 8
Discharge 4.23
Channel Slope 0.0027
Channel Bottom Width 2
Left Side Slope 3
Right Side Slope 3
Low Flow Liner
Retardence Class C 6-12 in
Vegetation Type Mix(Sod and Bunch)
Vegetation Density Good 65-79%
Soil Type Sandy Loam(GM)
S75
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
S75 Unvegetated Straight 4.23 cfs 1.18 ft/s 0.81 ft 0.042 1.6 lbs/ft2 0.14 lbs/ft2 11.71 STABLE D
Underlying Straight 4.23 cfs 1.18 ft/s 0.81 ft 0.042 1.51 Ibs/ft2 0.08 Ibs/ft2 17.83 STABLE D
Substrate
Unreinforced Vegetation
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 4.23 cfs 0.58 ft/s 1.26 ft 0.108 4 lbs/ft2 0.21 Ibs/ft2 18.81 STABLE --
Vegetation
Underlying Straight 4.23 cfs 0.58 ft/s 1.26 ft 0.108 4 Ibs/ft2 0.12 Ibs/ft2 32.45 STABLE --
Substrate
https://ecmds.com/project/161817/channel-analysis/271524/show 1/1