SW4211202_Design Calculations_20220307

STORMWATER NARRATIVE
IVY BROOK
Appendix
Allied Design Inc. Project No.: 21-016 Page 5

Appendix A
Allied Design, Inc.
CIVIL ENGINEERING ❖ LAND SURVEYING
4720 Kester Mill Road
Winston-Salem, North Carolina 27103
Ph. 336.765.2377 •3 Fax [phone]
B. Outlet Stabilization
an_ _. 17
PROJECT NAME Ivy Brook Subdivision
Outlet Stabilization
PROJECT NO.
BY
CHECKED BY
..a.,■.,
SHEET
DATE
DATE
1 OF 1
Z
Discharge (0/sec)
Curves may not be extrapolated.
Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition ffw < 0.5 diameter).
Outlet
Pipe
Diameter
Discharge
d50
La
W
dmax
apron
thickness
NCDOT
riprap
(in)
(cfs)
(ft)
(ft)
(ft)
(ft)
(in)
Class
100
24
15
0.40
12.0
14.0
0.6
10.8
B
TAKEN FROM THE NORTH CAROLINA EROSION AND SEDIMENT CONTROL
PLANNING AND DESIGN MANUAL

Appendix B
CT f -
Guide for Selecting &.Aannin�; t�
Roughness Coefficients for
NatUral Channels and Flood Plains
USGS data added for review of
Manning's coefficient - to
double check understanding of
NAG calculations that follow
UnIled States
Geological
Survey
Water-SUPPly
Paper 2339
Pre pj,red in
ctweration
,,tAh the
U,ked �iate�.
Department of
Tram,portation,
FedcraI
Adsiiiristrafi(>jj
I ;49P-I -,

Appendix B
CONTENTS
Abstract 1
Introduction 1
Methods 2
Channel n Values 2
Base n Values (nb) for Channels 2
Adjustment Factors for Channel n Values 6
Irregularity (n,) 6
Variation in Channel Cross Section (n2) 6
Obstructions (n3) 6
Vegetation (n4) 6
Meandering (m) 8
Flood -Plain n Values 8
Modified Channel Method 8
Adjustment Factors for Flood -Plain n Values 8
Surface Irregularities (n,) 8
Obstructions (n3) 8
Vegetation (n,) 8
Vegetation -Density Method 9
Techniques for Determining Vegetation Density 9
Indirect Technique 10
Direct Technique 10
Photographs of Flood Plains 13
Procedures for Assigning n Values 28
Steps for Assigning n Values 28
Reach Subdivision (Steps 1 and 2) 28
Channel Roughness (Steps 3-13) 28
Flood -Plain Roughness (Steps 14-23) 29
Examples of Procedures for Determining n Values 32
Summary 32
References Cited 37
FIGURES
1. Diagram of a schematic and cross sections of a hypothetical reach of a
channel and flood plain showing subdivisions used in assigning n values
2. Graph showing relation of stream power and median grain size to flow
regime 5
3. Diagram showing forms of bed roughness in sand -bed channels 5
4. Graph showing effective -drag coefficient for verified n values versus the
hydraulic radius of wide, wooded flood plains 10
5. Chart of example measurement of vegetation density showing tree diameter
and location in representative sample area 12
Contents III

Appendix B
Table 1. Base values of Manning's n
[Modified from Aldridge and Garrett, 1973, table l; —, no data]
Bed Median size of
material bed material
(in millimeters)
Base n value
Straight Smooth
uniform
channel'
channel2
Sand channels
Sand .................. 0.2 0.012 —
.3 .017
.4 .020 —
.5 .022 —
.6 .023 —
.8 025 —
1.0 .026 —
Stable channels and flood plains
Concrete ...............
—
0.012-0,018
0.011
Rock cut ...............
—
—
.025
Firm soil ...............
—
0.025-0_032
.020
Coarse sand ... _ ........
1-2
0.026--0.035
—
Fine gravel .............
---
—
.024
Gravel .................
2-64
0.028-0.035
—
Coarse gravel...........
—
--
.026
Cobble .................
64-256
0.030-0.050
—
Bouider ...... . ...... . ..
>256
0,040-0.070
---
' Benson and Dalrymple (1967).
2 For indicated material; Chow (1959).
3 Only for upper regime flow where grain roughness is predominant
moves easily and takes on different configurations or bed
forms. Bed form is a function of velocity of flow, grain
size, bed shear, and temperature. The flows that produce
the bed forms are classified as lower regime flow and upper
regime flow, according to the relation between depth and
discharge (fig. 2). The lower regime flow occurs during low
discharges, and the upper regime flow occurs during high
discharges. An unstable discontinuity, called a transitional
zone, appears between the two regimes in the depth to
discharge relation (fig. 3)_ In lower regime flow, the bed
may have a plane surface and no movement of sediment, or
the bed may be deformed and have small uniform waves or
large irregular saw-toothed waves formed by sediment
moving downstream. The smaller waves are known as
ripples, and the larger waves are known as dunes. In upper
regime flow, the bed may have a plane surface and sediment
movement or long, smooth sand waves that are in phase
with the surface waves. These waves are known as standing
waves and antidunes. Bed forms on dry beds are remnants
of the bed forms that existed during receding flows and may
not represent flood stages.
The flow regime is governed by the size of the bed
materials and the stream power, which is a measure of
energy transfer. Stream power (SP) is computed by the
formula:
SP=62 RS,,V (4)
where
62 =specific weight of water, in pounds per cubic foot,
R =hydraulic radius, in feet,
Sw = water -surface slope, in feet per foot, and
V=mean velocity, in feet per second.
The values in table 1 for sand channels are for upper
regime flows and are based on extensive laboratory and
field data obtained by the U.S. Geological Survey. When
using these values, a check must be made to ensure that the
stream power is large enough to produce upper regime flow
(fig. 2). Although the base n values given in table 1 for
stable channels are from verification studies, the values
have a wide range because the effects of bed roughness are
extremely difficult to separate from the effects of other
roughness factors. The choice of n values selected from
table 1 will be influenced by personal judgment and
experience. The n values for lower and transitional -regime
flows are much larger generally than the values given in
table 1 for upper regime flow. Simons, Li, and Associates
(1982) give a range of n values commonly found for
different bed forms.
The n value for a sand channel is assigned for upper
regime flow by using table 1, which shows the relation
between median grain size and the n value. The flow regime
is checked by computing the velocity and stream power that
correspond to the assigned n value. The computed stream
power is compared with the value that is necessary to cause
upper regime flow (see fig. 2, from Simons and Richard-
son, 1966, fig. 28). if the computed stream power is not
large enough to produce upper regime flow (an indication of
lower regime or transitional -zone flow), a reliable value of
n cannot be assigned. The evaluation of n is complicated by
bed -form drag. Different equations are needed to describe
the bed forms. The total n value for lower and transitional -
regime flows can vary greatly and depends on the bed forms
present at a particular time. Figure 3 illustrates how the total
resistance in a channel varies for different bed forms.
Limerinos (1970) related n to hydraulic radius and
particle size on the basis of samples from I stream
channels having bed material ranging from small gravel to
medium-sized boulders. Particles have three dimensions —
length, width, and thickness —and are oriented so that
length and width are parallel to the plane of the streambed.
Limerinos related n to minimum diameter (thickness) and to
intermediate diameter (width). His equation using interme-
diate diameter appears to be the most useful because this
dimension is the most easy to measure in the field and to
estimate from photographs.
The equation for n using intermediate diameter is
n--- (0.0926) Rv6 (S)
1.16+2.0 log R
d8t
4 Guide for Selecting Manning's Roughness Coefficients for Natural Channels and Flood Plains

Appendix B
where
R=hydraulic radius, in feet, and
dB4 =the particle diameter, in feet, that equals or exceeds
the diameter of 84 percent of the particles
(determined from a sample of about 100 ran-
domly distributed particles).
Limerinos selected reaches having a minimum amount of
roughness, other than that caused by bed material, and
corresponding to the average base values given by Benson
and Dalrymple (1967) shown in table 1.
Burkham and Dawdy (1976) showed that equation 5
applies to upper regime flow in sand channels. If a
measured d84 is available or can be estimated, equation 5
may be used to obtain a base n for sand channels in lieu of
using table 1.
Adjustment Factors for Channel n Values
The nb values selected from table 1 or computed from
the Limerinos equation are for straight channels of nearly
uniform cross -sectional shape. Channel irregularities, align-
ment, obstructions, vegetation, and meandering increase
the roughness of a channel. The value for n must be
adiusted accordingly by adding increments of roughness to
the base value, n,,, for each condition that increases the
roughness. The adjustments apply to stable and sand chan-
nels. Table 2, modified from Aldridge and Garrett (1973),
gives ranges of adjustments for the factors that affect
channel roughness for the prevailing channel conditions.
The average base values of Benson and Dalrymple (1967)
from table 1 and the values computed from equation 5 apply
to near -average conditions and, therefore, require smaller
adjustments than do the smooth -channel base values of
Chow (1959). Likewise, the adjustments (from table 2)
made to base values of Benson and Dalrymple (1967)
should be reduced slightly.
Depth of flow must be considered when selecting n
values for channels. If the depth of flow is shallow in
relation to the size of the roughness elements, the n value
can be large. The n value decreases with increasing depth,
except where the channel banks are much rougher than the
bed or where dense brush overhangs the low-water channel.
Irregularity (n,)
Where the ratio of width to depth is small, roughness
caused by eroded and scalloped banks, projecting points,
and exposed tree roots along the banks must be accounted
for by fairly large adjustments. Chow (1959) and Benson
and Dalrymple (1967) showed that severely eroded and
scalloped banks can increase n values by as much as 0.02.
Larger adjustments may be required for very large, irregular
banks that have projecting points.
Variation in Channel Cross Section (n.)
The value of n is not affected significantly by
relatively large changes in the shape and size of cross
sections if the changes are gradual and uniform. Greater
roughness is associated with alternating large and small
cross sections and sharp bends, constrictions, and side -
to -side shifting of the low-water channel. The degree of the
effect of changes in the size of the channel depends
primarily on the number of alternations of large and small
sections and secondarily on the magnitude of the changes.
The effects of abrupt changes may extend downstream for
several hundred feet. The n value for a reach below a
disturbance may require adjustment, even though none of
the roughness -producing factors are apparent in the study
reach. A maximum increase in n of 0.003 will result from
the usual amount of channel curvature found in designed
channels and in the reaches of natural channels used to
compute discharge (Benson and Dalrymple, 1967).
Obstructions (n3)
Obstructions —such as logs, stumps, boulders,
debris, pilings, and bridge piers —disturb the flow pattern in
the channel and increase roughness. The amount of increase
depends on the shape of the obstruction; the size of the
obstruction in relation to that of the cross section; and the
number, arrangement, and spacing of obstructions. The
effect of obstructions on the roughness coefficient is a
function of the flow velocity. When the flow velocity is
high, an obstruction exerts a sphere of influence that is
much larger than the obstruction because the obstruction
affects the flow pattern for considerable distances on each
side. The sphere of influence for velocities that generally
occur in channels that have gentle to moderately steep
slopes is about three to five times the width of the
obstruction. Several obstructions can create overlapping
spheres of influence and may cause considerable distur-
bance, even though the obstructions may occupy only a
small part of a channel cross section. Chow (1959) assigned
adjustment values to four levels of obstruction: negligible,
minor, appreciable, and severe (table 2).
Vegetation (n4)
The extent to which vegetation affects n depends on
the depth of flow, the percentage of the wetted perimeter
covered by the vegetation, the density of vegetation below
the high-water line, the degree to which the vegetation is
flattened by high water, and the alignment of vegetation
relative to the flow. Rows of vegetation that parallel the
flow may have less effect than rows of vegetation that are
perpendicular to the flow. The adjustment values given in
6 Guide for Selecting Manning's Roughness Coefficients for Natural Channels and Flood Plains

Appendix B
Table 2. Adjustment values for factors that affect the roughness of a channel
[Modified from Aldridge and Garrett, 1973, table 21
n value
Channel conditions adjustment' Example
Smooth
0.000 Compares to the smoothest channel attainable in a given bed material.
Minor
0.001-0.005 Compares to carefully dredged channels in good condition but having slightly
Degree of
eroded or scoured side slopes.
irregularity Moderate
0.006-0.010 Compares to dredged channels having moderate to considerable bed roughness
(nr)
and moderately sloughed or eroded side slopes.
Severe
0.011-0.020 Badly sloughed or scalloped banks of natural streams; badly eroded or sloughed
sides of canals or drainage channels; unshaped, jagged, and irregular surfaces
of channels in rock.
Gradual
0.000 Size and shape of channel cross sections change gradually.
Variation Alternating
0.001-0.005 Large and small cross sections alternate occasionally, or the main flow
in channel occasionally
occasionally shifts from side to side owing to changes in cross -sectional
cross section
shape.
(nz) Alternating
0.010- 0,015 Large and small cross sections alternate frequently, or the main flow frequently
frequently
shifts from side to side owing to changes in cross -sectional shape.
Negligible
0.000-0.004 A few scattered obstructions, which include debris deposits, stumps, exposed
roots, Iogs, piers, or isolated boulders, that occupy less than 5 percent of the
cross -sectional area.
Minor
0.005-0.015 Obstructions occupy less than 15 percent of the cross -sectional area, and the
spacing between obstructions is such that the sphere of influence around one
obstruction does not extend to the sphere of influence around another
Effect of
obstruction. Smaller adjustments are used for curved smooth -surfaced objects
obstruction
than are used for sharp -edged angular objects.
03) Appreciable
0.020-0.030 Obstructions occupy from 15 to 50 percent of the cross -sectional area, or the
space between obstructions is small enough to cause the effects of several
obstructions to he additive, thereby blocking an equivalent part of a cross
section.
Severe
0.040-0.050 Obstructions occupy more than 50 percent of the cross -sectional area, or the
space between obstructions is small enough to cause turbulence across most
of the cross section.
Small
0.002-0.010 Dense growths of flexible turf grass, such as Bermuda, or weeds growing where
the average depth of flow is at least two times the height of the vegetation;
supple tree seedlings such as willow, cottonwood, arrowweed, or saiteedar
growing where the average depth of flow is at least three times the height of
the vegetation.
Medium
0.010-0.025 Turf grass growing where the average depth of flow is from one to two times the
height of the vegetation; moderately dense stemmy grass, weeds, or tree
seedlings growing where the average depth of flow is from two to three times
the height of the vegetation; brushy, moderately dense vegetation, similar to
1- to 2-year-old willow trees in the dormant season, growing along the banks,
Amount of
and no significant vegetation is evident along the channel bottoms where the
vegetation
hydraulic radius exceeds 2 ft.
(n4) Large
0.025-0.050 Turf grass growing where the averaee depth of flow is about equal to the hei ht
of the vegetation; 8- to 10-year-old willow or cottonwood trees intergrown
with some weeds and brush (none of the vegetation in foliage) where the
hydraulic radius exceeds 2 ft; bushy willows about I year old intergrown with
some weeds along side slopes (all vegetation in full foliage), and no
significant vegetation exists along channel bottoms where the hydraulic
radius is greater than 2 ft.
Very large
0.050-0.100 Turf grass growing where the average depth of flow is less than half the heieltt
of the vegetation; bushy willow trees about I year old intergrown with weeds
along side slopes (all vegetation in full foliage), or dense cattails growing
along channel bottom; trees intergrown with weeds and brush (all vegetation
in full foliage).
Degree of Minor
1.00 Ratio of the channel long as the depth of flow drops, the adjustments
meandering2 Appreciable
1.15 Ratio of the channel leng get larger;
(m) Severe
1.30 Ratio of the channel len
' Adjustments for degree of irregularity, variations in cross section, effect of obstructio a conservatively adjusted value
before multiplying by the adjustment for meander. 0.025 (base) + 0.025 (adj) = 0.05
Adjustment values apply to flow confined in the channel and do not apply where dow
where NAG software recommends higher,
we will override and reduce to 0.05

NORTH
AMERICAId
GREEN
CHANNEL ANALYSIS
> > > Ditch #1
Name
Ditch #1
Discharge
0.8
Channel Slope
0.025
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
Fair 50-64%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
original submittal data,
provided for multiple comparisons
- see following pages for additional
comparison & updates
- refer also to plans for final updates
- except for Ditch #1, the remaining ditch
calcs present the original permit submital
first, with the final update/revision second
- for Ditch #1, several analysis are
presented, with the last page representing
the final values for design
Appendix B
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 0.8 cfs 1.08 ft/s
Vegetation
Underlying Straight 1 1.08 ft/s
Substrate
0.26 ft 0.075
0.26 ft 0.075
4lbs/ft2 0.41lbs/ft2
4lbs0.31lbs/ft2
9.71 STABLE --
12.77 STABLE --

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #1
Name Ditch #1
Discharge 0.8
Channel Slope 0.025
Channel Bottom Width 2
Left Side Slope 3
Right Side Slope 3
Low Flow Liner reduce vegetation height,
Retardence Class D 2-6 in I hold other values
Vegetation Type Mix (Sod and Bunch)
Vegetation Density Fair 50-64%
Soil Type Clay Loam (CL)
Unreinforced Vegetation
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
Unreinforced
Straight 0.8 cfs 1.37 ft/s
0.22 ft
0.053 4 I1s/ft2 0.34 Ibs/ft2
11.71 STABLE
Vegetation
Underlying
Straight 0.8 cfs
1.37 ft/s
0.22 ft
0.053 4 Ibs/ft2 0.27 Ibs/ft2
14.92 STABLE
Substrate
rn reduces, s.f.
still >0.05 increased

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #1
Name Ditch #1
Discharge 0.8
Channel Slope 0.025
Channel Bottom Width 2
Left Side Slope
Right Side Slope
Low Flow Liner
Retardence Class
Vegetation Type
Vegetation Density
3
3
D 2-6 in
Mix (Sod and Bunch)
Fair 50-64%
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Soil Type
Clay Loam (CL)
override N
calculation
Unreinforced Vegetation
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
Unreinforced
Straight 0.8 cfs 2.29 ft/s
0.14 ft
0.025 4 Ibs/ft2
0.22 Ibs/ft2
17.86 STABLE
Vegetation
Underlying
Straight 0.8 cfs
2.29 ft/s
0.14 ft
0.025 0.98 Ibs/ft2
0.19 Ibs/ft2
5.22 STABLE
Substrate
s.f.
increased

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #1
Name Ditch #1
Discharge 0.8
Channel Slope 0.025
Channel Bottom Width 2
Left Side Slope
Right Side Slope
Low Flow Liner
Retardence Class
Vegetation Type
Vegetation Density
3
3
D 2-6 in
Mix (Sod and Bunch)
Fair 50-64%
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Soil Type
Clay Loam (CL)
SC150
check for matting, even though stable with and without unreinforced vegetation
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
SC150
Straight 0.8 cfs 1.41 ft/s
0.21 ft
0.051 2 Ibs/ft2
0.34 Ibs/ft2
5.97
STABLE D
Unvegetated
Underlying
Straight 0.8 cfs 1.41 ft/s
0.21 ft
0.051 2.18 Ibs/ft2
0.26 Ibs/ft2
8.26
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 0.8 cfs 1.37 ft/s
0.22 ft
0.053 4 Ibs/ft2
0.34 Ibs/ft2
STABLE
Vegetation
Underlying
Straight 0.8 cfs 1.37 ft/s
0.22 ft
0.053 4 Ibs/ft2
0.27 Ibs/ft2
14.92 STABLE
Substrate

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #1
Name
Discharge
Channel Slope
Channel Bottom Width
Left Side Slope
Right Side Slope
Low Flow Liner
Retardence Class
Vegetation Type
Vegetation Density
Soil Type
SC150
Ditch #1 - Final
1.23 update per comments for incorrectly done flow values,
0.025 with matting presented as overdesign
2
3
3
D 2-6 in
Mix (Sod and Bunch) .
Fair 50-64%
Increased
Clay Loam (CL) depth of
did not
override
software
calculations
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
SC150
Straight 1.23 cfs 1.66 ft/s
0.26 ft
0.049 2 Ibs/ft2
0.41 Ibs/ft2
4.84
STABLE D
Unvegetated
Underlying
Straight 1.23 cfs 1.66 ft/s
0.26 ft
0.049 2.18 Ibs/ft2
0.31 Ibs/ft2
6.94
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 1.23 cfs 1.64 ft/s
0.27 ft
0.05 4 Ibs/ft2
0.42 Ibs/ft2
9.58 STABLE
Vegetation
Underlying
Straight 1.23 cfs 1.64 ft/s
0.27 ft
0.05 3.84 Ibs/ft2
0.32 Ibs/ft2
12.12 STABLE
Substrate

NORTH
AMERICAId
GREEN
CHANNEL ANALYSIS
> > > Ditch #2
Name
Ditch #2 Original submittal data; see next page for update(s)
Discharge
1.76
Channel Slope
0.0448
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
Fair 50-64%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
Appendix B
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 1.76 cfs 2.03 ft/s 0.3 ft 0.057 4 Ibs/ft2 0.83 Ibs/ft2 4.8 STABLE
Vegetation
Underlying Straight 1 1.76 cf� 2.03Tft/s 0.3 ft 0.057 4 Ibs/f2 0.62 Ibs/ft2 6.45 STABLE
Substrate

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #2
Name Ditch #2
Discharge 4.29
Channel Slope 0.0448
Channel Bottom Width 2
Left Side Slope
Right Side Slope
Low Flow Liner
Retardence Class
Vegetation Type
Vegetation Density
Soil Type
SC150
3
3
- Final
updated for flow, added matting (overdesign)
D 2-6 in
Mix (Sod and Bunch)
Fair 50-64%
Clay Loam (CL)
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
SC150
Straight 4.29 cfs 3.52 ft/s
0.39 ft
0.038 2 Ibs/ft2
1.08 Ibs/ft2
1.85
STABLE D
Unvegetated
Underlying
Straight 4.29 cfs 3.52 ft/s
0.39 ft
0.038 2.18 Ibs/ft2
0.77 Ibs/ft2
2.84
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 4.29 cfs 3.7 ft/s
0.37 ft
0.035 4 Ibs/ft2
1.04 Ibs/ft2
3.84 STABLE
Vegetation
Underlying
Straight 4.29 cfs 3.7 ft/s
0.37 ft
0.035 1.94 Ibs/ft2
0.74 Ibs/ft2
2.6 STABLE
Substrate

NORTH
AMERICAId
GREEN
CHANNEL ANALYSIS
> > > Ditch #3
Name
Ditch #3 Original submittal data; see next page for update(s)
Discharge
1.33
Channel Slope
0.0159
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
Fair 50-64%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
Appendix B
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Patten
Unreinforced Straight 1.33 cfs 1.04 ft/s 0.4 ft 0.078 4 Ibs/ft2 0.4 Ibs/ft2 10.06 STABLE
Vegetation
Underlying Straight 1 1.33 cf� I 04Tft/s 0.4 ft 0.078 4 Ibs/f2 0.28 Ibs/ft2 14.25 STABLE
Substrate

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #3
Name Ditch #3
Discharge 6.77
Channel Slope 0.0159
Channel Bottom Width 2
Left Side Slope
Right Side Slope
Low Flow Liner
Retardence Class
Vegetation Type
Vegetation Density
Soil Type
SC150
3
3
- Final
updated for flow, added matting (overdesign)
D 2-6 in
Mix (Sod and Bunch)
Fair 50-64%
Clay Loam (CL)
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
SC150
Straight 6.77 cfs 2.44 ft/s
0.68 ft
0.044 2 Ibs/ft2
0.68 Ibs/ft2
2.95
STABLE D
Unvegetated
Underlying
Straight 6.77 cfs 2.44 ft/s
0.68 ft
0.044 2.18 Ibs/ft2
0.43 Ibs/ft2
5.01
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 6.77 cfs 2.46 ft/s
0.68 ft
0.044 4 Ibs/ft2
0.67 Ibs/ft2
5.93 STABLE
Vegetation
Underlying
Straight 6.77 cfs 2.46 ft/s
0.68 ft
0.044 2.99 Ibs/ft2
0.43 Ibs/ft2
6.92 STABLE
Substrate

NORTH
AMERICAId
GREEN
CHANNEL ANALYSIS
> > > Ditch #4
Name
Ditch #4 Original submittal data; see next page for update(s)
Discharge
1.12
Channel Slope
0.0501
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
Fair 50-64%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
Appendix B
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 1.12 cfs 1.8 ft/s
Vegetation
Underlying Straight 1. c 1.8 ft/s
Substrate
0.23 ft 0.059
0.23 ft 0.059
4lbs/ft2 0.72lbs/ft2
41bs/ft2 0.56lbs/ft2
5.53 STABLE --
7.11 STABLE --

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #4
Name Ditch #4
Discharge 8.67
Channel Slope 0.0501
Channel Bottom Width 2
Left Side Slope
Right Side Slope
Low Flow Liner
Retardence Class
Vegetation Type
Vegetation Density
Soil Type
SC150
3
3
- Final
updated for flow, added matting (overdesign)
D 2-6 in
Mix (Sod and Bunch)
Fair 50-64%
Clay Loam (CL)
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
SC150
Straight 8.67 cfs 4.78 ft/s
0.51 ft
0.034 2 Ibs/ft2
1.6 Ibs/ft2
1.25
STABLE D
Unvegetated
Underlying
Straight 8.67 cfs 4.78 ft/s
0.51 ft
0.034 2.18 Ibs/ft2
1.08 Ibs/ft2
2.02
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 8.67 cfs 5.16 ft/s
0.49 ft
0.031 4 Ibs/ft2
1.52 Ibs/ft2
2.63 STABLE
Vegetation
Underlying
Straight 8.67 cfs 5.16 ft/s
0.49 ft
0.031 1.49 Ibs/ft2
1.04 Ibs/ft2
1.44 STABLE
Substrate

NORTH
AMERICAId
GREEN
CHANNEL ANALYSIS
> > > Ditch #5
Name
Ditch #5 Original submittal data; see next page for update(s)
Discharge
0.72
Channel Slope
0.0448
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
Fair 50-64%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
Appendix B
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 0.72 cfs 1.41 ft/s 0.2 ft 0.065 4 Ibs/ft2 0.55 Ibs/ft2 7.26 STABLE
Vegetation
Underlying Straight 1 0.72 cf� I 4Dt/s 0.2 ft 0.065 4 Ibs/f2 0.44 Ibs/ft2 9.1 STABLE
Substrate

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #5
Name Ditch #5
Discharge 0.94
Channel Slope 0.0448
Channel Bottom Width 2
Left Side Slope
Right Side Slope
Low Flow Liner
Retardence Class
Vegetation Type
Vegetation Density
Soil Type
SC150
3
3
- Final
updated for flow, added matting (overdesign)
D 2-6 in
Mix (Sod and Bunch)
Fair 50-64%
Clay Loam (CL)
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
SC150
Straight 0.94 cfs 1.98 ft/s
0.19 ft
0.045 2 Ibs/ft2
0.52 Ibs/ft2
3.85
STABLE D
Unvegetated
Underlying
Straight 0.94 cfs 1.98 ft/s
0.19 ft
0.045 2.18 Ibs/ft2
0.42 Ibs/ft2
5.21
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 0.94 cfs 1.99 ft/s
0.18 ft
0.044 4 Ibs/ft2
0.52 Ibs/ft2
7.74 STABLE
Vegetation
Underlying
Straight 0.94 cfs 1.99 ft/s
0.18 ft
0.044 3.09 Ibs/ft2
0.42 Ibs/ft2
7.4 STABLE
Substrate

NORTH
AMERICAId
GREEN
CHANNEL ANALYSIS
> > > Ditch #6
Name
Ditch #6 Original submittal data; see next page for update(s)
Discharge
4.42
Channel Slope
0.05
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
Fair 50-64%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
Appendix B
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 4.42 cfs 3.1 ft/s
Vegetation
Underlying Straight 1 4.42 cf�/s
Substrate
0.43 ft 0.048
I
0.43 ft 0.048
4 Ibs/ft2 1.35 Ibs/ft2
3.61lbs� 0.94lbs/ft2
2.97 STABLE --
3.85 STABLE --

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #6
Name Ditch #6
Discharge 6.38
Channel Slope 0.05
Channel Bottom Width 2
Left Side Slope
Right Side Slope
Low Flow Liner
Retardence Class
Vegetation Type
Vegetation Density
Soil Type
SC150
3
3
- Final
updated for flow, added matting (overdesign)
D 2-6 in
Mix (Sod and Bunch)
Fair 50-64%
Clay Loam (CL)
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
SC150
Straight 6.38 cfs 4.29 ft/s
0.45 ft
0.035 2 Ibs/ft2
1.39 Ibs/ft2
1.44
STABLE D
Unvegetated
Underlying
Straight 6.38 cfs 4.29 ft/s
0.45 ft
0.035 2.18 Ibs/ft2
0.96 Ibs/ft2
2.26
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 6.38 cfs 4.58 ft/s
0.43 ft
0.032 4 Ibs/ft2
1.33 Ibs/ft2
3.02 STABLE
Vegetation
Underlying
Straight 6.38 cfs 4.58 ft/s
0.43 ft
0.032 1.63 Ibs/ft2
0.93 Ibs/ft2
1.76 STABLE
Substrate

NORTH
AMERICAId
GREEN
CHANNEL ANALYSIS
> > > Ditch #7
Name
Ditch #7 Original submittal data; see next page for update(s)
Discharge
1.41
Channel Slope
0.05
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
Fair 50-64%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
Appendix B
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 1.41 cfs 1.97 ft/s
Vegetation
Underlying Straight 1 1.41 cf�t/s
Substrate
0.26 ft 0.057
0.26 ft 0.057
4 Ibs/ft2 0.8 Ibs/ft2
41bs/ft2 0.61lbs/ft2
4.98 STABLE --
6.52 STABLE --

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #7
Name Ditch #7
Discharge 2.55
Channel Slope 0.05
Channel Bottom Width 2
Left Side Slope
Right Side Slope
Low Flow Liner
Retardence Class
Vegetation Type
Vegetation Density
Soil Type
SC150
3
3
- Final
updated for flow, added matting (overdesign)
D 2-6 in
Mix (Sod and Bunch)
Fair 50-64%
Clay Loam (CL)
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
SC150
Straight 2.55 cfs 3.07 ft/s
0.29 ft
0.039 2 Ibs/ft2
0.9 Ibs/ft2
2.21
STABLE D
Unvegetated
Underlying
Straight 2.55 cfs 3.07 ft/s
0.29 ft
0.039 2.18 Ibs/ft2
0.68 Ibs/ft2
3.22
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 2.55 cfs 3.19 ft/s
0.28 ft
0.037 4 Ibs/ft2
0.88 Ibs/ft2
4.56 STABLE
Vegetation
Underlying
Straight 2.55 cfs 3.19 ft/s
0.28 ft
0.037 2.14 Ibs/ft2
0.66 Ibs/ft2
3.24 STABLE
Substrate

NORTH
AMERICAId
GREEN
CHANNEL ANALYSIS
> > > Ditch #8
Name
Ditch #8 Original submittal data; see next page for update(s)
Discharge
0.51
Channel Slope
0.0159
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
Fair 50-64%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
Appendix B
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Patten
Unreinforced Straight 0.51 cfs 0.71 ft/s 0.26 ft 0.09 4 Ibs/ft2 0.26 Ibs/ft2 15.55 STABLE
Vegetation
Underlying Straight 0. c 0.71 ft/s 0.26 ft 0.09 4 Ibsbs/ft2 0.2 Ibs/ft2 20.38 STABLE
Substrate

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #8
Name Ditch #8
Discharge 0.57
Channel Slope 0.0159
Channel Bottom Width 2
Left Side Slope
Right Side Slope
Low Flow Liner
Retardence Class
Vegetation Type
Vegetation Density
Soil Type
SC150
3
3
- Final
updated for flow, added matting (overdesign)
D 2-6 in
Mix (Sod and Bunch)
Fair 50-64%
Clay Loam (CL)
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
SC150
Straight 0.57 cfs 0.99 ft/s
0.22 ft
0.058 2 Ibs/ft2
0.21 Ibs/ft2
9.3
STABLE D
Unvegetated
Underlying
Straight 0.57 cfs 0.99 ft/s
0.22 ft
0.058 2.18 Ibs/ft2
0.17 Ibs/ft2
12.89
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 0.57 cfs 0.94 ft/s
0.23 ft
0.063 4 Ibs/ft2
0.22 Ibs/ft2
17.82 STABLE
Vegetation
Underlying
Straight 0.57 cfs 0.94 ft/s
0.23 ft
0.063 4 Ibs/ft2
0.18 Ibs/ft2
22.82 STABLE
Substrate

NORTH
AMERICAId
GREEN
CHANNEL ANALYSIS
> > > Ditch #9
Name
Ditch #9 Original submittal data; see next page for update(s)
Discharge
0.43
Channel Slope
0.0159
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
Fair 50-64%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
Appendix B
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Patten
Unreinforced Straight 0.43 cfs 0.66 ft/s 0.24 ft 0.092 4 Ibs/ft2 0.24 Ibs/ft2 16.83 STABLE
Vegetation
Underlying Straight 0. c 0.66 ft/s 0.24 ft 0.092 4 Ibs/f2 0.18 Ibs/ft2 21.76 STABLE
Substrate

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #9
Name Ditch #9
Discharge 1.45
Channel Slope 0.0159
Channel Bottom Width 2
Left Side Slope
Right Side Slope
Low Flow Liner
Retardence Class
Vegetation Type
Vegetation Density
Soil Type
SC150
3
3
- Final
updated for flow, added matting (overdesign)
D 2-6 in
Mix (Sod and Bunch)
Fair 50-64%
Clay Loam (CL)
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
SC150
Straight 1.45 cfs 1.41 ft/s
0.34 ft
0.052 2 Ibs/ft2
0.34 Ibs/ft2
5.94
STABLE D
Unvegetated
Underlying
Straight 1.45 cfs 1.41 ft/s
0.34 ft
0.052 2.18 Ibs/ft2
0.25 Ibs/ft2
8.89
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 1.45 cfs 1.37 ft/s
0.35 ft
0.055 4 Ibs/ft2
0.34 Ibs/ft2
11.6 STABLE
Vegetation
Underlying
Straight 1.45 cfs 1.37 ft/s
0.35 ft
0.055 4 Ibs/ft2
0.25 Ibs/ft2
16.01 STABLE
Substrate

NORTH
AMERICAId
GREEN
CHANNEL ANALYSIS
> > > Ditch #10
Name
Ditch #10 Original submittal data; see next page for update(s)
Discharge
1.62
Channel Slope
0.0501
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
Fair 50-64%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
Appendix B
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 1.62 cfs 2.09 ft/s
Vegetation
Underlying Straight 1 1.62 cf�t/s
Substrate
0.27 ft 0.056
0.27 ft 0.056
4lbs/ft2 0.86lbs/ft2
41bs/ft2 0.65lbs/ft2
4.67 STABLE --
6.17 STABLE --

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #10
Name Ditch #10 - Final
Discharge 3.52 updated for flow, added matting (overdesign)
Channel Slope 0.0501
Channel Bottom Width 2
Left Side Slope
Right Side Slope
Low Flow Liner
Retardence Class
Vegetation Type
Vegetation Density
Soil Type
SC150
3
3
D 2-6 in
Mix (Sod and Bunch)
Fair 50-64%
Clay Loam (CL)
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
SC150
Straight 3.52 cfs 3.46 ft/s
0.34 ft
0.038 2 Ibs/ft2
1.06 Ibs/ft2
1.89
STABLE D
Unvegetated
Underlying
Straight 3.52 cfs 3.46 ft/s
0.34 ft
0.038 2.18 Ibs/ft2
0.77 Ibs/ft2
2.83
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 3.52 cfs 3.63 ft/s
0.33 ft
0.035 4 Ibs/ft2
1.02 Ibs/ft2
3.93 STABLE
Vegetation
Underlying
Straight 3.52 cfs 3.63 ft/s
0.33 ft
0.035 1.94 Ibs/ft2
0.75 Ibs/ft2
2.6 STABLE
Substrate

NORTH
AMERICAId
GREEN
CHANNEL ANALYSIS
> > > Ditch #11
Name
Ditch #11 Original submittal data; see next page for update(s)
Discharge
6.89
Channel Slope
0.14
Channel Bottom Width
4
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
Fair 50-64%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
Appendix B
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 6.89 cfs 5.58 ft/s
Vegetation
Underlying Straight 6. c iiiiiiiii*5.58 ft/s
Substrate
0.26 ft 0.036
0.26 ft 0.036
4lbs/ft2 2.25lbs/ft2
2.05lbs� 1.91lbs/ft2
1.78 STABLE --
1.07 STABLE --

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #11
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Name Ditch #11 - Final
Discharge 9.9 updated for Class 1 riprap since regs don't allow for inlet with pipe to carry runoff from roadside
ditch to bottom of fill -slope - trying to maintain existing hydrology and minimize changes into
Channel Slope 0.245 existing pond and wetland areas
Channel Bottom Width 4
Left Side Slope
3
Right Side Slope
3
Low Flow Liner
Retardence Class
E <2 in
Vegetation Type
None
Vegetation Density
None
Soil Type
Clay Loam (CL)
Rock Riprap
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Rock Riprap Straight 9.9 cfs 8.24 ft/s 0.25 ft 0.032 3.33 Ibs/ft2 3.28 Ibs/ft2 1.02 STABLE
Unvegetated

NORTH
AMERICAId
GREEN
CHANNEL ANALYSIS
> > > Ditch #12
Name
Ditch #12 Original submittal data; see next page for update(s)
Discharge
23.73
Channel Slope
0.067
Channel Bottom Width
4
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
Fair 50-64%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
Appendix B
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Unreinforced Straight 23.73 cfs 6.41 ft/s
Vegetation
Underlying Straight 1 23.73 cTS 6.41 ft/s
Substrate
0.63 ft 0.036
0.63 ft 0.036
4lbs/ft2 2.63lbs/ft2
2.02lbs� 1.94lbs/ft2
1.52 STABLE --
1.04 STABLE --

Appendix B
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > Ditch #12 - existing channel
Name
Ditch #12 -existing channel - Final
Discharge
23.28 update retardance class
Channel Slope
0.067
Channel Bottom Width
4
Left Side Slope
3
Right Side Slope
3
Low Flow Liner
Retardence Class
D 2-6 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Fair 50-64%
Soil Type
Clay Loam (CL)
02-71',
North American Green
5401 St. Wendel-Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal
Permissible
Calculated
Safety
Staple
Phase
Reach
Discharge
Velocity
Mannings N
Remarks
Depth
Shear Stress
Shear Stress
Factor
Pattern
SC250
Straight
23.28 cfs
7.18 ft/s
0.57 ft
0.03
3 Ibs/ft2
2.37 Ibs/ft2
1.27
STABLE
E
Unvegetated
Underlying
Straight
23.28 cfs
7.18 ft/s
0.57 ft
0.03
3.27 Ibs/ft2
1.78 Ibs/ft2
1.84
STABLE
E
Substrate
SC250
Straight
23.28 cfs
8.1 ft/s
0.52 ft
0.026
10 Ibs/ft2
2.17 Ibs/ft2
4.61
STABLE
E
Reinforced
Vegetation
Underlying
Straight
23.28 cfs
8.1 ft/s
0.52 ft
0.026
3 Ibs/ft2
1.65 Ibs/ft2
1.81
STABLE
E
Substrate

Appendix C
NOAA Atlas 14, Volume 2, Version 3
Location name: Winston Salem, North Carolina,
USA*
>t, Latitude: 35.9713°, Longitude:-80.2316°h'V
Elevation: m/ft**
*source: ESRI Maps V10
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/hourp
Average
recurrence interval (years)
1
2
5
10
25
50
100
200
500
1000
4.58
5.45
6.35
6.95
7.61
8.03
8.39
8.69
8.98
9.14
5-min
(4.21-4.98)
(5.02-5.93)
(5.84-6.90)
(6.38-7.54)
(6.96-8.24)
(7.30-8.71)
(7.58-9.11)
(7.81-9.44)
(7.99-9.78)
(8.08-10.00)
3.66
4.36
5.08
5.56
6.07
6.39
6.67
6.88
7.10
7.21
10-min
(3.37-3.98)
(4.01-4.74)
(4.67-5.53)
(5.11-6.03)
(5.54-6.57)
(5.81-6.94)
(6.03-7.24)
(6.19-7.48)
(6.32-7.73)
1 (6.36-7.87)
3.05
3.65
4.28
4.68
5.12
5.40
5.62
5.79
5.96
6.03
15-min
(2.80-3.31) 11
(3.36-3.97) 11
(3.94-4.66) 11
(4.30-5.08) 11
(4.68-5.55)
1 (4.91-5.86)
1 (5.08-6.10)
1 (5.21-6.30)
1 (5.31-6.49)
1 (5.32-6.58)
2.09
2.52
3.04
3.39
3.80
4.06
4.30
4.51
4.74
4.88
30-min
(1.92-2.27) 1
1 (2.80-3.31)
(3.12-3.68) 11
(3.47-4.11)
1 (3.70-4.41)
1 (3.89-4.67)
1 (4.06-4.90)
1 (4.22-5.16)
1 (4.31-5.33)
1.30
1.58
1.95
2.21
2.53
2.75
2.96
3.16
3.40
3.56
60-min
(1.20-1.42) 11
(1.46-1.72)
(1.80-2.12)
1 (2.31-2.74)
1 (2.50-2.99)
1 (2.68-3.22)
1 (2.84-3.44)
1 (3.03-3.70)
1 (3.15-3.89)
0.757
0.918
1.14
1.31
1.52
1.67
1.82
1.97
2.15
2.29
2-hr
(0.700-0.821)
(0.848-0.998)1
1 (1.39-1.64)
(1.52-1.81)
1 (1.65-1.97)
1 (1.76-2.13)
1 (1.90-2.34)
1 (2.00-2.49)
0.539
0.654
0.816
F 0.934
1.09
1.20
1.32
1.42
1.57
1.67
3-hr
(0.498-0.585)
(0.605-0.710)
(0.753-0.884)
(0.860-1.01)
(0.994-1.18)
1 (1.09-1.30)
1 (1.19-1.42)
1 (1.27-1.54)
1 (1.38-1.70)
1 (1.46-1.81)
0.329
0.397
0.495
0.570
0.669
0.745
F 0.822
F 0.898
1.00
1.08
6-hr
(0.304-0.358)
(0.368-0.433)
(0.457-0.539)
(0.524-0.618)
(0.610-0.724)
(0.675-0.806)
(0.738-0.888)
(0.798-0.971)
(0.875-1.08)
(0.932-1.17)
0.193
0.233
0.292
0.338
0.401
0.450
0.501
0.554
0.626
0.681
12-hr
(0.178-0.210)
(0.215-0.255)
(0.269-0.319)
(0.310-0.368)
(0.364-0.434)
(0.406-0.487)
(0.447-0.541)
(0.488-0.597)
(0.542-0.674)
(0.581-0.735)
0.117
0.141
0.176
0.204
0.241
0.271
0.302
0.333
0.376
0.410
24-hr
(0.109-0.126)
(0.131-0.152)
(0.164-0.190)
(0.189-0.220)
(0.223-0.260)
(0.249-0.293)
(0.277-0.326)
(0.304-0.360)
(0.341-0.408)
(0.370-0.446)
0.068
0.081
0.101
0.116
0.136
0.152
0.168
0.184
0.206
0.223
2-day
(0.063-0.073)
(0.076-0.087)
(0.094-0.108)
(0.108-0.124)
(0.126-0.146)
(0.140-0.163)
(0.154-0.180)
(0.169-0.198)
(0.188-0.223)
(0.203-0.242)
0.048
0.057
0.071
0.081
0.096
F107
0.118
F129
F145
F157
3-day
(0.045-0.051)
(0.054-0.062)
(0.066-0.076)
(0.076-0.087)
(0.089-0.102)
(0.099-0.114)
(0.109-0.127)
(0.119-0.139)
(0.132-0.157)
(0.143-0.170)
0.038
0.045
0.056
0.064
0.075
0.084
0.093
0.102
0.115
0.124
4-day
(0.036-0.041)
(0.043-0.049)
(0.052-0.060)
(0.060-0.069)
(0.070-0.081)
(0.078-0.090)
(0.086-0.100)
(0.094-0.110)
(0.105-0.124)
(0.113-0.135)
0.025
0.030
0.036
0.041
0.048
0.053
0.059
0.064
0.072
0.078
7-day
(0.023-0.026)
(0.028-0.032)
(0.034-0.038)
(0.038-0.044)
(0.045-0.051)
(0.049-0.057)
(0.054-0.063)
(0.059-0.069)
(0.066-0.077)
(0.071-0.084)
0.020
0.023
0.028
0.032
0.037
0.041
0.045
0.049
0.054
0.059
10-day
(0.019-0.021)
(0.022-0.025)
(0.027-0.030)
(0.030-0.034)
(0.035-0.039)
(0.038-0.043)
(0.042-0.048)
(0.045-0.052)
(0.050-0.058)
(0.054-0.063)
0.013
0.016
0.019
0.021
0.024
0.026
0.029
0.031
0.035
0.037
20-day
(0.013-0.014)
(0.015-0.017)
(0.018-0.020)
(0.020-0.022)
(0.023-0.025)
(0.025-0.028)
(0.027-0.031)
(0.029-0.033)
(0.032-0.037)
(0.034-0.040)
0.011
0.013
0.015
0.017
0.019
0.020
0.022
0.024
0.026
0.027
30-day
(0.010-0.011)
(0.012-0.013)
(0.014-0.016)
(0.016-0.017)
(0.018-0.020)
(0.019-0.021)
(0.021-0.023)
(0.022-0.025)
(0.024-0.027)
(0.025-0.029)
0.009
0.011
0.012
0.014
0.015
0.016
0.017
0.019
0.020
0.021
45-day
(0.009-0.010)
(0.010-0.011)
(0.012-0.013)
(0.013-0.014)
(0.014-0.016)
(0.016-0.017)
(0.017-0.018)
(0.018-0.020)
(0.019-0.021)
(0.020-0.023)
0.008
0.010
0.011
0.012
0.013
0.014
0.015
0.016
0.017
0.018
60-day
(0.008-0.009)
(0.009-0.010)
(0.010-0.011)
(0.011-0.012)
(0.012-0.014)
(0.013-0.015)
(0.014-0.015)
(0.015-0.016)
(0.016-0.018)
(0.017-0.018)
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

Appendix C
PD5-based intensity -duration -frequency (IDF) curves
Latitude: 35.9713`, Longitude:-30.2316'
WHOM]
1.000
41
C
3MN [MI(
0 001
t t Jr t L N N O r{4 N rq rq rq N rq N Alb N rV A q O O O Ln O
,1 r-I rn w � N rn v Ln
Duration
10.000
1.000
ZI
m
.c
0.100
O
49
2L
V 0.010
a
0 001
1 2 5 10 25 50 100 200 500 10Do
Average recurrence interval (years)
NOAA Atlas 14, Volume 2, Version 3 Created {GMT}: Thu Sep 34 18:07:462021
Back to Top
Maps & aerials
Small scale terrain
Average recurrence
mlerva I
{years}
— 1
2
— 5
— 14
— 25
54
100
200
500
1000
Duration
— 6-min —
2-day
— 10-min —
3-day
15-min —
d-dmy
— 30-min —
7-day
— 6 Wain —
I o-day
— 2fir —
20-day
— 3-trr —
30-day
— Sfir —
45-day
— 12-hr —
60-day
- 24-hr

Large scale terrain
Blacksburg ;.
5
7
Bristol
Winston-Salem
. Uuii,am
k.
shoro Ralei h
i-•1t i_1itJ,all � � �
�sherille NORTH C A P O L I N A
Charlotte Fayetteville.
100km
.
ri 6 mi
Large scale map
E_ ,Brit^I
,Johnson
shevifle
Winston-S31,, oGmeenstroro
a rh am
., Raleigh
North
Carolina +
Sfil0lte
F
0
100km
Large scale aerial
Appendix C