SW1221001_Stormwater Report_20221004

HYDROLOGY AND EROSION CONTROL STUDY
FOR
Patton Cove Subdivision
5593 Old Clyde Road
Clyde, NC 28721
PIN 8647-73-1558
CDC project No. 12164
Patton Cove Developers, LLC
P.O. Box 1157
Arden, NC 28704
Contact: Ken Jackson
[phone]
ENGINEER
Mica J. Cain, PE
a E Spa o1,
SEAL =
= 047788
FNGINE��
h%gELJIM
J G
July 18, 2022
Rev: Sept. 22, 2022
CDCivil
Design
Concepts, PA
168 Patton Avenue, Asheville, NC 28801
828-252-5388

TABLE OF CONTENTS
ITEM/DESCRIPTION PAGE NO.
1.0
2.0
3.0
Introduction.................................................................................................. 1
ErosionControls........................................................................................... 1
StormwaterAnalysis.................................................................................... 2
3.1 Water Quality Volume..................................................................... 2
3.2 Water Quality Drawdown................................................................ 4
3.3 Water Quantity..............................................................4
APPENDICES
Appendix A
GIS Map, FEMA Firm Map, USGS Topo Map
Appendix B
USDA NRCS Soils Report
Appendix C
Rainfall Depth/Intensity Data
Appendix D
Drainage Area Maps
Appendix E
Skimmer Basin Design Calculations
Appendix F
Ditch Flowrate Calculations, Channel Protection, Outfall Protection
Appendix G
Permanent Pond and Forebay Volumes (HydroCAD)
Appendix H
1-Year Storm Event HydroCAD Output Report
Appendix I
10-Year Storm Event HydroCAD Output Report
Appendix J
50-Year Storm Event HydroCAD Output Report
Appendix K
Drawdown HydroCAD Output Report
Appendix L
Storm Drainage Calculations

Hydrology and Erosion Control Study
Patton Cove Subdivision
1.0 INTRODUCTION
Page 1
The project is located at 5593 Old Clyde Road within the jurisdictional limits of Haywood County, NC
See Appendix A for map / aerial data. The parcel is approximately 19.25 acres. The subject property
consists of mostly cultivated farmland with one existing home. Adjacent to the site is undeveloped land
to the north and west, a small subdivision to the east and Old Clyde Road to the south. Currently there
are no detention or water quality facilities on site. The predeveloped impervious area is approximately
3%. The site has average slopes of 6% with existing site drainage generally flowing east to west
discharging into Patton Branch. Per NCDEQ surface water classification map, Patton Branch (stream
index: 5-11) has a "C" classification. None of this project is in the 100-year floodplain.
The proposed project will install a new stormwater network and one wet pond as a stormwater control
measure (SCM) to reduce the impacts of the proposed project. It is the intent of this report to
demonstrate that the proposed stormwater management facilities will comply with the water quantity
and quality requirements regulated by Haywood County and the state of North Carolina. At the time of
this report, there were no known drainage concerns related to this site or downstream properties.
2.0 EROSION CONTROLS
The parcel consists of 19.25 acres. Approximately 13.92 acres will be disturbed by construction
activities. A USDA NRCS Soils Report is included in Appendix B. All erosion control measures
proposed have been designed to the 10-year storm event. See Appendix C for rainfall amounts used in
this study. Drainage area maps can be found in Appendix D.
Erosion controls will be completed in a three-phase approach. Phase 1 will include site clearing and
rough grading. During this phase, erosion control devices will consist of a construction entrance,
perimeter silt fences, temporary ditches, and two skimmer basins. Calculations to support the sizing of
the skimmer basins are present in Appendix E.
Phase 2 will include site development and utility installation. During this phase permanent stormwater
pipes and structures with inlet protection will be added as construction progresses and reinforcement
fabrics will be installed in permanent ditches as needed. Calculations associated with channel
stabilization and outlet protection are provided in Appendix F. Outlet protection will be provided in
the form of rip rap aprons and will be installed to prevent scouring. Vegetative stabilization measures
will be applied to all areas of the site that remain at grade for more than 7 days. Vertical construction
of buildings will commence once all erosion control measures are in place.
Phase 3 will consist of site stabilization. Pavement, buildings, grass, and landscapes will aid in surface
stabilization. Maintenance of all erosion control measures shall continue until the site is fully stabilized.
The project will convert skimmer basin `A' to wet detention pond `A.' Pond slopes will be stabilized,
and all remaining erosion control measures will be removed when no longer necessary. Please refer to
the construction plans for further information on the erosion control measures. Seeding information and
construction sequencing have been outlined on sheet C931.

Hydrology and Erosion Control Study
Patton Cove Subdivision
3.0 STORMWATER ANALYSIS
Page 2
3.1 Water Quality Volume: The state of North Carolina requires that the project provide enough
water quality volume (WQv) to treat a design storm depth of 1 inch on the developed site. Per NCDEQ
minimum design criteria for wet ponds, the main pool surface area and volume can be found using the
SA/DA (minimum surface area to drainage area ratio) Tables with Average Depth Method. See
supporting calculations for wet pond `A' below.
Wet Pond `A'
Impervious Fraction:
Total Drainage Area (DA) to WQv Basin = 10.09 Acres
Total Impervious Area to WQv Basin = 6.15 Acres
Impervious Fraction (IA) = 0.61
Per NCDEQ SCM C-3, the average depth of the permanent pool must be greater than or equal to 3.0-ft.
Volume of Permanent Pool (VPP) Provided = 36,447 CF
Surface Area of Permanent Pool (SA) Provided = 10,869 SF
See Appendix G for pond volume calculations.
NCDEQ SCM C-3 (MDC 2) Equation 2 can be used to establish average depth (Dave):
Davg = VPP/SA
Davg = 36,447/10,869 = 3.35 FT
3.35FT > 3.0 FT hence Davg provided is acceptable

Hydrology and Erosion Control Study
Patton Cove Subdivision
NCDEQ Sturmwuater Design Manual
Page 3
F. ,v
Table I: Pied= nrand Moun fain SAIDA Table (Adapfed from Oriscorl, 1986)
10%
0.51
0.43
0.37
0.30
0.27
0.25
20%
0.64
0.69
0.61
0.51
0.44
0.40
30%
1.17
0.94
0_94
0.72
0.6 t
0.56
40%
1.61
1_24
1.09
0.91
0.78
0_71
50%
1.79
f _5 t
1.31
1.13
0.95
0.87
■
60%
2.09
1.77
t _49
1.31
1.12
1.03
70%
2.51
2.09
t _BO
1.55
1.34
1.17
80%
2.92
2.41
2.07
1.82
1.62
1.40
go%
3.25
2.64
2.31
2.04
1.84
1.59
100%
3.55
2.79
2.52
2.34
2.04
1_75
When using a Davg of 3.0, an interpolated SA/DA ratio per NCDEQ SCM C-3 Table 1 for 6 1 %
impervious cover is 2.13 (expressed as a %).
Minimum surface area required for the permanent pool using known drainage area and SA/DA ratio:
SA = 2.13 / 100 * 10.09 AC * 43,560 SF = 9,362 SF
Proposed Surface Area of Permanent Pool (SA) = 10,869 SF
10,869 SF > 9,362 SF hence SA provided is acceptable.
Forebay volume required to be 15-20% of permanent pool volume per NCDEQ SCM C-3 MDC 5:
Permanent pool volume provided = 36,447 CF
36,447 * 0.15 = 5,467
36,447 * 0.20 = 7,289
Acceptable volume range: 5,467 CF - 7,289 CF
Provided volume: 6,447
Provided volume is within acceptable range.
Required water quality volume for 1-in storm depth utilizing the simple method:
Total Area to WQv Basin = 10.09 Acres
Runoff Coefficient (Rv) _ .05+0.9 x IA
Runoff Coefficient (Rv) = 0.599
WQv = 3630 x 1-in x 0.599 x 10.09-ac = 21,939 CF

Hydrology and Erosion Control Study
Patton Cove Subdivision
Wet Pond `A' temporary pool provides 36,447 CF of storage below the overflow weir.
36,447 CF >21,939 hence temporary pool volume provided is acceptable.
See Appendices H, I and J for available storage / peak staging data.
Page 4
3.2 Water Quality Drawdown: The state of North Carolina requires that the provided WQv
discharge over a period between two and five days. See Site Development Plans for details of the
stormwater outlet control structure orifice(s). Based on the HydroCAD output report provided in
Appendix K, the wet pond `A' will drawdown in approximately 33 Hours.
3.3 Water Quantity:
The proposed stormwater networks have been designed to convey a 25-year storm event (See
Appendix L). Peak attenuation of storm events larger than that required for water quality is not
required by Haywood County or State of North Carolina ordinances. All stormwater ponds have been
designed to safely convey a 50 year — 24 hour storm event. Freeboard elevations have been provided in
table 3.3 below.
Table 3.3: Stormwater Staging Analysis
Wet Pond A
Modeled
Storm
Event
Staging
Elevation
feet
Top of Stormwater
Detention Basin
feet
Freeboard
feet
1-Year
2577.63
2580.50
2.87
10-Year
2578.84
2580.50
1.66
50-Year
2579.41
2580.50
1.09

APPENDIX A
GIS Map
FEMA Firm Map
USGS Topo Map

J
LL JI
_ � R 50M RD
35
- •- � Q, A, , 1 - �� COGBURN"FARM RD �
74 2600
Opµ.,/ PLP --�
09o\•�R/SE,DR � � / � //i"_ � \ ( � F , (J � `J 'Q,�/- L RING � ..
�2• i • Z� 600 �1
J w _
34
y OLD'CLYDE- D-ritureCem
Hayne Ce��
S 19 m
6' O P
19
PCrawford- Ra
H9klL Cem y
l'r Memorral'Garde
� ' � 23 �
PROJECT
V s -
�� a
I
al 33

3935
Km�i]Y
3934
3933
WA
�r
.%I,r4
i owl
a
MR
1_
i
f

L.
O
LL
O
Q
r-
00
T
U �
CD
N
w U
Q
U T Z
Z X ZZ
O m Z
a a U
{ 4i4 V z
c CD
0 00 O O 00 U
_ r ❑
++ 00 w
c CD
3
C{S
z a) 'a
Q d J Q
c
E
L
N
0
Z
J
J
w
O Co'O O
❑ OO O O N 00 O
N 00 N O N TO
O O N > = Ch N CO 00 I- N
N O N N CCD 0qT 000 — COO O
❑ O r N CO H? ER H} 613 H} 613 Ch
d'
w £
❑ W CD 7
J tm = CCi _7 i
❑ ++ i L 3 7 > CO >:E tm Cw1
O m Q N ; — Lo 'i CCi
c as L w d C
M L.t�� as as
Lo 2 CD H H m CD
U) J m 2 C Q CO) CO)
N
O O
o
�
.qTN
p
f0� w
II Oj
L T
ow
m�@@w'_ pmc
.woE o
�+
zem9�
_ CO
c�v wno9
n c
m LCCBCC'ffigs
E W
H W O> y
mW$mg88a
E $Ys c
@:s��8
6 Vrc
n w a
M,
*i
rr2 SR - k y4i
l
f~' '
i• h _

4-0
4-0
ry
0
0
H
0
4-0
m
Z
d
a
RmSry
o
x
c
�Q,
mH
W
v
m
m
r
R e
m iri 'Q
m
N r
m COD
y
L7
r
a C
m
R
0L
m
3
m Lor-
m
C1 N m p
bO
= tlp r
D
a n m
S
3 y C8Y .�.
m
O
G
= 03
N a
F C a
Ln
D N E a
�O y
c Y
np
y
N a
v
N
d m
C
L N
T w m
L❑
d
i`y
LL
LL
S
5i L
d
'
10.6
O
LL G m
L 01
p
r a
p
m 0 C
L L m
N H d VN
L m L] y
x n
N
C
t' LL
_+L_' y 9
W [.� i 3
07
V EI N
m
.} Q
01 T
Y y i
w
,i N
Q
y C
a m y E 4I
G E
y 1• G L L
LL
d 8
U V L r
r a N 2 S
m
^C
;?
C
N G1 p
G w L.1 m
y LL
= u
R
Q
an d
■1 a
9 V
an d
a 0.
«
L
m V m
y m❑
m
LL
m r
❑
a ILL
G
d
L
m 01
G m C 3
L.�
L m r
m
m ❑
=
O r o
a s W
L LL
Q ■1
- N m
C
c6
C V
m
y,�
4a C
= C
= C d '�
m
yy
O LL .r-. L
U V7
N
=
U❑
D O
y H p v7
O
F m
N
CS .m..
C1
p.
a T
O! 41
i6 N L_
m
4f7 ` O
01 a N
m
O a IG ■1
mm
C c
m W
a
t N
3
O
C Qj
m Li
m y O
R nq
5r9
16
N .a 3'
�n
N pNj �+ C
L d 16
L ECL
L a
N
L Ilp
m
N ri a y
y
„3, m N a 41
3 L y
Y d
N
m >
L y
yy
O m m N N
6 m
m O a
O
40 ❑
D
C
GCt
ay
0 Ci r
Q N d
C V �p G- m
� m 02,0
y
^�
3
3
o❑ a m
LL 0 Q J Q
Q W
Q
L 7 J
L 7 L] m J ^
C] R 2
❑ Z
7
yN� O
W a Q
0 y N E? $
m
r
W
:
4 r 3
roc
m
Y a O
3 =
m N p c G�1
03' Eda
may
cacmmo
d C `y d
a
x
m
--
n m u�i a
a 2 p N J Np
O a aFL
O N
Q
a�a
Q INiI
W W-
W
0.0
a m ;g
V 9
@ O m Z a❑
C m a
a m m v
O
N a
lit
cr
x a
Z
y
g
G m �.
m N
a R O
LL Q
J<
w�
•�
4
Q
z I
Q�
4
Q
a
�'
mw 0 G
- m
p-L]L N
O 6 H
m G ip Q❑
r y n a _m
Q a
a❑
LL
d
41 '3]
t
41 r N 0V1 Gl V
Lmm�Em
N C y E 3
=mno-�LW
w
w�
h
g
-_tu
a
wx
x
❑
r�
y�
■F ■
. '! , It
■lk
k%-.
` IOW SO* A#
z p
n N
M ry
O
O
( y
r U'
C.
ft
ov
L.L C CD (0
N
0
0
0
0
0
L�7
0

APPENDIX B
USDA NRCS Soils Report

USDA United States
Department of
Agriculture
N RCS
Natural
Resources
Conservation
Service
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
Haywood County
Area, North
Carolina
Patton Cove Soil Report
July 14, 2022

Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nres.usda.gov/wps/
portal/nres/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https:Hoffices.sc.egov.usda.gov/locator/app?agency=nres) or your NRCS State Soil
Scientist (http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/?
cid=nres142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (NRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require

alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at [phone] (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call [phone] (voice) or [phone] (TDD). USDA is an equal opportunity
provider and employer.

Contents
Preface....................................................................................................................
2
SoilMap..................................................................................................................
5
SoilMap................................................................................................................6
Legend..................................................................................................................7
MapUnit Legend..................................................................................................
8
MapUnit Descriptions..........................................................................................
8
Haywood County Area, North Carolina...........................................................10
BkB2—Braddock clay loam, 2 to 8 percent slopes, eroded ........................
10
BkC2—Braddock clay loam, 8 to 15 percent slopes, eroded ......................
11
CxA—Cullowhee-Nikwasi complex, 0 to 2 percent slopes, frequently
flooded..................................................................................................
13
DsB—Dillsboro loam, 2 to 8 percent slopes................................................14
DsC—Dillsboro loam, 8 to 15 percent slopes..............................................15
EvD—Evard-Cowee complex, 15 to 30 percent slopes ..............................
16
HaC2—Hayesville clay loam, 8 to 15 percent slopes, eroded ....................
18
Soil Information for All Uses...............................................................................21
Soil Properties and Qualities..............................................................................
21
Soil Qualities and Features.............................................................................21
Hydrologic Soil Group (Patton Cove Soil Report) .......................................
21
References............................................................................................................
26

Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.

329630
35° 32' 32" N Miss
8
A—i
Custom Soil Resource Report
Soil Map
329710 329790 329870 329950
HaON
13 R, ►-2
°.
valid at t.luis sc+al•e.
35° 32'9"N mom"
329630 329710 329790 329870 329950
N Map Scale: 1:3,450 if printed on A portrait (8.5" x 11") sheet.
Myers
N 0 50 100 200 300
Feet
0 150 300 E00 900
Map projection: Web Mercator Comer coordinates: WGS84 Edge tics: UTM Zone 17N WCS84
6
in
330110
35° 32' 32" N
g
�S
35° 32' 9" N
330110
in

MAP LEGEND
Area of Interest (AOI)
0
Area of Interest (AOI)
Soils
0
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special
Point Features
Iwo
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
�i
Gravelly Spot
Landfill
A.
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
oa
Sodic Spot
Custom Soil Resource Report
MAP INFORMATION
Spoil Area
The soil surveys that comprise your AOI were mapped at
1:12,000.
Stony Spot
Very Stony Spot
Warning: Soil Map may not be valid at this scale.
Wet Spot
Enlargement of maps beyond the scale of mapping can cause
Other
misunderstanding of the detail of mapping and accuracy of soil
�-
Special Line Features
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
Water Features
scale.
Streams and Canals
Transportation
Please rely on the bar scale on each map sheet for map
E F
Rails
measurements.
. 0
Interstate Highways
Source of Map: Natural Resources Conservation Service
US Routes
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Major Roads
Local Roads
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
Background
distance and area. A projection that preserves area, such as the
Aerial Photography
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Haywood County Area, North Carolina
Survey Area Data: Version 23, Jan 21, 2022
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: May 3, 2020—May 7,
2020
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
7

Custom Soil Resource Report
Map Unit Legend
Map Unit Symbol
Map Unit Name
Acres in AOI
Percent of AOI
BkB2
Braddock clay loam, 2 to 8
3.0
11.5%
percent slopes, eroded
BkC2
Braddock clay loam, 8 to 15
9.2
35.5%
percent slopes, eroded
CxA
Cullowhee-Nikwasi complex, 0
4.3
16.5%
to 2 percent slopes,
frequently flooded
DsB
Dillsboro loam, 2 to 8 percent
1.4
5.4%
slopes
DsC
Dillsboro loam, 8 to 15 percent
6.5
25.1 %
slopes
EvD
Evard-Cowee complex, 15 to 30
0.1
0.2%
percent slopes
HaC2
Hayesville clay loam, 8 to 15
1.5
5.8%
percent slopes, eroded
Totals for Area of Interest
26.8
100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. If included in the database for a
given area, the contrasting minor components are identified in the map unit

Custom Soil Resource Report
descriptions along with some characteristics of each. A few areas of minor
components may not have been observed, and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha -Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha -Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.

Custom Soil Resource Report
Haywood County Area, North Carolina
BkB2—Braddock clay loam, 2 to 8 percent slopes, eroded
Map Unit Setting
National map unit symbol: Ibxy
Elevation: 1,770 to 2,090 feet
Mean annual precipitation: 50 to 58 inches
Mean annual air temperature: 46 to 57 degrees F
Frost -free period: 116 to 170 days
Farmland classification: All areas are prime farmland
Map Unit Composition
Braddock, moderately eroded, and similar soils: 80 percent
Minor components: 20 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Braddock, Moderately Eroded
Setting
Landform: Stream terraces
Landform position (three-dimensional): Mountainbase, tread
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Old alluvium
Typical profile
Ap - 0 to 11 inches: clay loam
Bt - 11 to 57 inches: clay
BC - 57 to 80 inches: loam
Properties and qualities
Slope: 2 to 8 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat): Moderately low to
moderately high (0.06 to 0.20 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water supply, 0 to 60 inches: High (about 9.0 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 2e
Hydrologic Soil Group: C
Hydric soil rating: No
Minor Components
Urban land
Percent of map unit. 8 percent
Hydric soil rating: No
10

Custom Soil Resource Report
Udorthents
Percent of map unit: 6 percent
Landform: Stream terraces
Landform position (three-dimensional): Mountainbase, tread
Down -slope shape: Convex, linear
Across -slope shape: Convex, linear
Hydric soil rating: No
Thurmont
Percent of map unit: 4 percent
Landform: Drainageways on stream terraces
Landform position (three-dimensional): Mountainbase, base slope
Down -slope shape: Concave, linear
Across -slope shape: Linear
Hydric soil rating: No
Hemphill, undrained
Percent of map unit: 1 percent
Landform: Depressions on stream terraces
Landform position (three-dimensional): Mountainbase, base slope
Down -slope shape: Concave, linear
Across -slope shape: Concave, linear
Hydric soil rating: Yes
Dillard
Percent of map unit: 1 percent
Landform: Drainageways on stream terraces
Landform position (three-dimensional): Mountainbase, base slope
Down -slope shape: Concave, linear
Across -slope shape: Linear
Hydric soil rating: No
BkC2—Braddock clay loam, 8 to 15 percent slopes, eroded
Map Unit Setting
National map unit symbol: Ibxx
Elevation: 1,750 to 2,200 feet
Mean annual precipitation: 50 to 58 inches
Mean annual air temperature: 46 to 57 degrees F
Frost -free period: 116 to 170 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Braddock, moderately eroded, and similar soils: 80 percent
Minor components: 20 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
11

Custom Soil Resource Report
Description of Braddock, Moderately Eroded
Setting
Landform: Stream terraces
Landform position (three-dimensional): Mountainbase, tread
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Old alluvium
Typical profile
Ap - 0 to 11 inches: clay loam
Bt - 11 to 57 inches: clay
BC - 57 to 80 inches: loam
Properties and qualities
Slope: 8 to 15 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat): Moderately low to
moderately high (0.06 to 0.20 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water supply, 0 to 60 inches: High (about 9.0 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: C
Hydric soil rating: No
Minor Components
Urban land
Percent of map unit. 8 percent
Hydric soil rating: No
Udorthents
Percent of map unit. 6 percent
Landform: Stream terraces
Landform position (three-dimensional): Mountainbase, tread
Down -slope shape: Linear, convex
Across -slope shape: Linear, convex
Hydric soil rating: No
Thurmont
Percent of map unit. 4 percent
Landform: Drainageways on stream terraces
Landform position (three-dimensional): Mountainbase, base slope
Down -slope shape: Concave, linear
Across -slope shape: Linear
Hydric soil rating: No
Dillard
Percent of map unit. 2 percent
Landform: Drainageways on stream terraces
12

Custom Soil Resource Report
Landform position (three-dimensional): Mountainbase, base slope
Down -slope shape: Concave, linear
Across -slope shape: Linear
Hydric soil rating: No
CxA—Cullowhee-Nikwasi complex, 0 to 2 percent slopes, frequently
flooded
Map Unit Setting
National map unit symbol: Ibyb
Elevation: 1,200 to 2,000 feet
Mean annual precipitation: 45 to 70 inches
Mean annual air temperature: 46 to 57 degrees F
Frost -free period: 116 to 170 days
Farmland classification: Not prime farmland
Map Unit Composition
Cullowhee, frequently flooded, and similar soils: 40 percent
Nikwasi, frequently flooded, and similar soils: 30 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Cullowhee, Frequently Flooded
Setting
Landform: Flood plains
Down -slope shape: Linear
Across -slope shape: Concave
Parent material: Loamy alluvium over sandy and gravelly alluvium
Typical profile
A - 0 to 13 inches: fine sandy loam
C - 13 to 23 inches: loamy sand
Ab - 23 to 35 inches: loamy sand
C' - 35 to 80 inches: extremely gravelly sand
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: 20 to 40 inches to strongly contrasting textural
stratification
Drainage class: Somewhat poorly drained
Runoff class: Very low
Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95
in/hr)
Depth to water table: About 18 to 24 inches
Frequency of flooding: NoneFrequent
Frequency of ponding: None
Available water supply, 0 to 60 inches: Low (about 3.6 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4w
13

Custom Soil Resource Report
Hydrologic Soil Group: A/D
Hydric soil rating: No
Description of Nikwasi, Frequently Flooded
Setting
Landform: Depressions on flood plains
Down -slope shape: Linear, concave
Across -slope shape: Concave
Parent material: Loamy alluvium over sandy and gravelly alluvium
Typical profile
Ap - 0 to 8 inches: fine sandy loam
A - 8 to 26 inches: fine sandy loam
Cg - 26 to 80 inches: extremely gravelly coarse sand
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: 20 to 40 inches to strongly contrasting textural
stratification
Drainage class: Very poorly drained
Runoff class: Negligible
Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95
in/hr)
Depth to water table: About 0 to 12 inches
Frequency of flooding: NoneFrequent
Frequency of ponding: Occasional
Available water supply, 0 to 60 inches: Low (about 4.4 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 6w
Hydrologic Soil Group: A/D
Hydric soil rating: Yes
DsB—Dillsboro loam, 2 to 8 percent slopes
Map Unit Setting
National map unit symbol: Ibyf
Elevation: 1,200 to 2,000 feet
Mean annual precipitation: 45 to 70 inches
Mean annual air temperature: 46 to 57 degrees F
Frost -free period: 116 to 170 days
Farmland classification: All areas are prime farmland
Map Unit Composition
Dillsboro and similar soils: 85 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
14

Custom Soil Resource Report
Description of Dillsboro
Setting
Landform: Fans, stream terraces
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Tread
Down -slope shape: Linear
Across -slope shape: Convex
Parent material: Old alluvium and/or old colluvium derived from igneous and
metamorphic rock
Typical profile
Ap - 0 to 10 inches: loam
Bt1 - 10 to 15 inches: clay
Bt2 - 15 to 43 inches: sandy clay loam
2BC - 43 to 87 inches: cobbly sandy clay loam
Properties and qualities
Slope: 2 to 8 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: Medium
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.57 to 1.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water supply, 0 to 60 inches: Moderate (about 7.4 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 2e
Hydrologic Soil Group: B
Hydric soil rating: No
DsC—Dillsboro loam, 8 to 15 percent slopes
Map Unit Setting
National map unit symbol: Ibyg
Elevation: 1,200 to 2,000 feet
Mean annual precipitation: 45 to 70 inches
Mean annual air temperature: 46 to 57 degrees F
Frost -free period: 116 to 170 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Dillsboro and similar soils: 85 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
15

Custom Soil Resource Report
Description of Dillsboro
Setting
Landform: Fans, stream terraces
Landform position (two-dimensional): Summit, shoulder
Landform position (three-dimensional): Tread
Down -slope shape: Linear
Across -slope shape: Convex
Parent material: Old alluvium and/or old colluvium derived from igneous and
metamorphic rock
Typical profile
Ap - 0 to 10 inches: loam
Bt1 - 10 to 15 inches: clay
Bt2 - 15 to 43 inches: sandy clay loam
2BC - 43 to 87 inches: cobbly sandy clay loam
Properties and qualities
Slope: 8 to 15 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: Medium
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.57 to 1.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water supply, 0 to 60 inches: Moderate (about 7.4 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: B
Hydric soil rating: No
EvD—Evard-Cowee complex, 15 to 30 percent slopes
Map Unit Setting
National map unit symbol: 2vOyd
Elevation: 1,670 to 4,770 feet
Mean annual precipitation: 38 to 82 inches
Mean annual air temperature: 46 to 57 degrees F
Frost -free period: 137 to 159 days
Farmland classification: Farmland of local importance
Map Unit Composition
Evard and similar soils: 50 percent
Cowee and similar soils: 30 percent
Minor components: 20 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
it.

Custom Soil Resource Report
Description of Evard
Setting
Landform: Mountain slopes, ridges
Landform position (two-dimensional): Backslope, summit
Landform position (three-dimensional): Mountainflank, mountaintop, side slope,
crest
Down -slope shape: Convex, linear
Across -slope shape: Linear, convex
Parent material: Residuum weathered from biotite gneiss and/or amphibolite that
is affected by soil creep in the upper solum
Typical profile
A - 0 to 5 inches: gravelly loam
Bt - 5 to 32 inches: clay loam
BC - 32 to 45 inches: loam
C - 45 to 80 inches: sandy loam
Properties and qualities
Slope: 15 to 30 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.57 to 1.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water supply, 0 to 60 inches: High (about 9.1 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4e
Hydrologic Soil Group: B
Hydric soil rating: No
Description of Cowee
Setting
Landform: Mountain slopes, ridges
Landform position (two-dimensional): Backslope, summit
Landform position (three-dimensional): Mountainflank, mountaintop, side slope,
crest
Down -slope shape: Convex
Across -slope shape: Linear
Parent material: Residuum weathered from biotite gneiss and/or amphibolite that
is affected by soil creep in the upper solum
Typical profile
A - 0 to 5 inches: gravelly sandy loam
Bt - 5 to 27 inches: sandy clay loam
Cr - 27 to 80 inches: bedrock
Properties and qualities
Slope: 15 to 30 percent
Depth to restrictive feature: 20 to 40 inches to paralithic bedrock
Drainage class: Well drained
17

Custom Soil Resource Report
Runoff class: Medium
Capacity of the most limiting layer to transmit water (Ksat): Very low to high (0.00
to 1.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water supply, 0 to 60 inches: Low (about 4.2 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4s
Hydrologic Soil Group: C
Hydric soil rating: No
Minor Components
Saunook
Percent of map unit. 12 percent
Landform: Toes on drainageways
Landform position (two-dimensional): Footslope
Landform position (three-dimensional): Mountainbase, upper third of
mountainflank, base slope, head slope
Down -slope shape: Linear, concave
Across -slope shape: Concave
Hydric soil rating: No
Hayesville
Percent of map unit. 8 percent
Landform: Ridges on hillslopes
Landform position (two-dimensional): Shoulder, summit
Landform position (three-dimensional): Mountaintop, side slope, crest
Down -slope shape: Convex, linear
Across -slope shape: Linear, convex
Hydric soil rating: No
HaC2—Hayesville clay loam, 8 to 15 percent slopes, eroded
Map Unit Setting
National map unit symbol. Ibyx
Elevation: 1,790 to 2,280 feet
Mean annual precipitation: 50 to 58 inches
Mean annual air temperature: 46 to 57 degrees F
Frost -free period: 124 to 176 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Hayesville, moderately eroded, and similar soils: 80 percent
Minor components: 20 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
18

Custom Soil Resource Report
Description of Hayesville, Moderately Eroded
Setting
Landform: Ridges
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Linear
Parent material: Residuum weathered from hornblende gneiss and/or amphibolite
Typical profile
Ap - 0 to 6 inches: clay loam
Bt - 6 to 33 inches: clay loam
BC - 33 to 45 inches: loam
C - 45 to 80 inches: fine sandy loam
Properties and qualities
Slope: 8 to 15 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: Medium
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.57 to 1.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water supply, 0 to 60 inches: High (about 9.7 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: B
Hydric soil rating: No
Minor Components
Cowee, stony
Percent of map unit. 8 percent
Landform: Ridges
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Linear
Hydric soil rating: No
Fannin
Percent of map unit. 7 percent
Landform: Ridges
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Linear
Hydric soil rating: No
Urban land
Percent of map unit. 5 percent
Hydric soil rating: No
19

Custom Soil Resource Report
20

Soil Information for All Uses
Soil Properties and Qualities
The Soil Properties and Qualities section includes various soil properties and
qualities displayed as thematic maps with a summary table for the soil map units in
the selected area of interest. A single value or rating for each map unit is generated
by aggregating the interpretive ratings of individual map unit components. This
aggregation process is defined for each property or quality.
Soil Qualities and Features
Soil qualities are behavior and performance attributes that are not directly
measured, but are inferred from observations of dynamic conditions and from soil
properties. Example soil qualities include natural drainage, and frost action. Soil
features are attributes that are not directly part of the soil. Example soil features
include slope and depth to restrictive layer. These features can greatly impact the
use and management of the soil.
Hydrologic Soil Group (Patton Cove Soil Report)
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive precipitation
from long -duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly
wet. These consist mainly of deep, well drained to excessively drained sands or
gravelly sands. These soils have a high rate of water transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well drained
soils that have moderately fine texture to moderately coarse texture. These soils
have a moderate rate of water transmission.
21

Custom Soil Resource Report
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of water
transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink -swell
potential, soils that have a high water table, soils that have a claypan or clay layer at
or near the surface, and soils that are shallow over nearly impervious material.
These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in their
natural condition are in group D are assigned to dual classes.
22

Custom Soil Resource Report
� Map —Hydrologic Soil Group (Patton Cove Soil Report)
329630 329710 329790 329870 329950 330030
35° 32' 32" N
35° 32'9"N
329630 329710 329790 329870 329950
N Map Scale: 1:3,450 if printed on A portrait (8.5" x 11") sheet.
Myers
N 0 50 100 200 300
Feet
0 150 300 E00 900
Map projection: Web Mercator Comer coordinates: WGS84 Edge tics: UTM Zone 17N WCS84
23
in
330110
35° 32' 32" N
r
g
�S
35° 32' 9" N
330110
in

MAP LEGEND
Area of Interest (AOI)
0
Area of Interest (AOI)
Soils
Soil Rating
Polygons
0
A
0
A/D
0
B
0
B/D
0
C
0
C/o
0
D
0
Not rated or not available
Soil Rating
Lines
N .
A
r .
A/D
N 0
B
r 0
B/D
.
C
C/o
r
D
Not rated or not available
Soil Rating
Points
❑
A
❑
A/D
0
B
0
B/D
Custom Soil Resource Report
C
C/o
0 D
❑ Not rated or not available
Water Features
Streams and Canals
Transportation
i-" Rails
­0 Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
MAP INFORMATION
The soil surveys that comprise your AOI were mapped at
1:12,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Haywood County Area, North Carolina
Survey Area Data: Version 23, Jan 21, 2022
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: May 3, 2020—May 7,
2020
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
24

Custom Soil Resource Report
Table —Hydrologic Soil Group (Patton Cove Soil Report)
Map unit symbol
Map unit name
Rating
Acres in AOI
Percent of AOI
BkB2
Braddock clay loam, 2 to
C
3.0
11.5%
8 percent slopes,
eroded
BkC2
Braddock clay loam, 8 to
C
9.2
35.5%
15 percent slopes,
eroded
CxA
Cullowhee-Nikwasi
A/D
4.3
16.5%
complex, 0 to 2
percent slopes,
frequently flooded
DsB
Dillsboro loam, 2 to 8
B
1.4
5.4%
percent slopes
DsC
Dillsboro loam, 8 to 15
B
6.5
25.1 %
percent slopes
EvD
Evard-Cowee complex,
B
0.1
0.2%
15 to 30 percent
slopes
HaC2
Hayesville clay loam, 8
B
1.5
5.8%
to 15 percent slopes,
eroded
Totals for Area of Interest
26.8
100.0%
Rating Options —Hydrologic Soil Group (Patton Cove Soil
Report)
Aggregation Method: Dominant Condition
Component Percent Cutoff.- None Specified
Tie -break Rule: Higher
25

References
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep -water habitats of the United States. U.S. Fish and Wildlife
Service FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric
soils in the United States.
National Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.
U.S. Department of Agriculture Handbook 18. http://www.nres.usda.gov/wps/portal/
n res/d eta i I/n ati o n a I/s o i Is/?cid = n res 142 p2_0 54262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for
making and interpreting soil surveys. 2nd edition. Natural Resources Conservation
Service, U.S. Department of Agriculture Handbook 436. http://
www. nres. usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://
www. nres. usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
United States Department of Agriculture, Natural Resources Conservation Service.
National forestry manual. http://www.nres.usda.gov/wps/portal/nres/detail/soils/
home/?cid=nres142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://www.nres.usda.gov/wps/portal/nres/
detail/national/landuse/rangepastu re/?cid=stelprdb1043084
W

Custom Soil Resource Report
United States Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430-VI. http://www.nres.usda.gov/wps/portal/
n res/d eta i I/so i Is/scie ntists/?cid=n res 142 p2_054242
United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,
the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook
296. http://www.nres.usda.gov/wps/portal/nres/detail/national/soils/?
cid = n res 142 p2_05 3624
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http:H
www.nrcs.usda.gov/lnternet/FSE—DOCUMENTS/nrcsl 42p2_052290. pdf
27

APPENDIX C
Rainfall Depth/Intensity Data

5/2/22, 10:12 AM
Precipitation Frequency Data Server
NOAA Atlas 14, Volume 2, Version 3
Location name: Clyde, North Carolina, USA*
�'It
Latitude: 35.539*, Longitude:-82.876*
Elevation: 2583.88 ft *
*source: ESRI Maps 'w,�w,
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)1
Average recurrence interval (years)
1
2
5
10
25
50
100
200
500
1000�
0.335
0.396
0.478
0.541
0.622
0.683
0.744
0.804
0.882
0.943
5-min
(0.302-0.372)
(0.358-0.441)
(0.431-0.531)
(0.487-0.600)
(0.556-0.689)
(0.607-0.757)
(0.657-0.826)
(0.706-0.896)
(0.765-0.988)
(0.810-1.06)
0.535
0.634
0.765
0.865
0.991
1.09
1.18
1.27
1.40
1.48
10-min
(0.482-0.594)
(0.572-0.705)
(0.690-0.850)
(0.779-0.960)
(0.886-1.10)
(0.966-1.21)
(1.05-1.31) 1
1 (1.21-1.56)
(1.28-1.67)
0.669
0.797
0.968
1.09
1.26
1.38
1.49
1.61
1.76
1.86
15-min
(0.603-0.743)
(0.720-0.886)
(0.872-1.08)
(0.985-1.21)
(1.12-1.39) 11
(1.22-1.53) 11
(1.32-1.66) 11
(1.41-1.79) 1
l(l.60-2.10)1
0.917
1.10
1.38
1.59
1.86
2.07
2.29
2.50
2.79
3.02
30-min
(0.826-1.02)
(0.994-1.22)
(1.24-1.53)
11 (1.43-1.76) 11
(1.66-2.06)
(1.84-2.30)
(2.02-2.54)
(2.20-2.79) 11
(2.42-3.13)
(2.59-3.40)
1.14
1.38
1.76
2.06
2.48
2.81
3.15
3.51
4.01
4.41
60-min
(1.03-1.27)
(1.25-1.54)
(1.59-1.96)
(1.86-2.29)
(2.21-2.74)
(2.50-3.12)
1 (3.48-4.49)
(3.79-4.96)
1.32
1.59
2.02
2.36
2.84
3.23
3.63
4.05
4.63
5.08
2-hr
(1.19-1.46)
(1.44-1.76)
(1.82-2.23)
(2.13-2.61)
(2.54-3.13)
(2.87-3.57)
(3.21-4.02)
(3.55-4.49) 11
(4.00-5.16)
(4.35-5.70)
1.39
1.66
2.08
2.44
2.95
3.37
3.82
4.28
4.94
5.46
3-hr
(1.26-1.54)
11 (1.50-1.84)
11 (1.89-2.31)
11 (2.20-2.69) 11
(2.64-3.25) 1
1 (3.36-4.22) 11
(3.74-4.75) 11
(4.25-5.52)
(4.64-6.13)
1.66
1.94
2.40
2.80
3.37
3.85
4.36
4.89
5.64
6.23
6-hr
(1.52-1.82)
11 (1.78-2.14)
11 (2.19-2.64)
11 (2.55-3.07) 1
1 (3.45-4.20) 11
(3.87-4.76) 11
(4.30-5.36) 11
(4.88-6.22)
(5.32-6.89)
2.03
2.38
2.91
3.35
3.95
4.43
4.90
5.37
5.98
6.39
12-hr
(1.87-2.21)
11 (2.19-2.60)
11 (2.68-3.17)
11 (3.08-3.64) 11
(3.61-4.29) 11
(4.04-4.80)
(4.45-5.32) 1
1 (5.37-6.52)
(5.71-7.00)
2.34
2.80
3.43
3.93
4.62
5.17
5.72
6.28
7.01
7.56
24-hr
(2.17-2.51)
(2.60-3.00)
(3.19-3.68)
(3.65-4.21)
(4.28-4.94)
1 (5.77-6.70)
(6.42-7.47)
(6.90-8.04)
2.77
3.29
4.00
4.56
5.33
5.94
6.55
7.16
7.95
8.55
2{iay
(2.60-2.95)
(3.09-3.52)
(3.75-4.27)
(4.27-4.87)
(4.97-5.67) 11
(5.53-6.31)
(6.09-6.95)
(6.62-7.59)
(7.32-8.45)
(7.85-9.05)
2.97
3.52
4.24
4.81
5.59
6.19
6.79
7.38
8.14
8.70
3{iay
(2 79-3.16)
(3.32-3.75)
(3.99-4.52)
(4.52-5.12)
(5.23-5.92) 11
(5.79-6.56)
(6.33-7.19) 11
(6.86-7.81) 11
(7.54-8.62)
(8.04-9.20)
3.17
3.76
4.49
5.07
5.84
6.44
7.03
7.60
8.33
8.85
4{iay
(299-3.36)
11 (3.55-3.99)
11 (4.24-4.76)
11 (4.78-5.37) 11
(5.49-6.18) 11
(6.05-6.81) 11
(6.58-7.43) 11
(7.11-8.03) 11
(7.76-8.80)
(8.24-9.35)
3.75
4.44
5.30
5.99
6.92
7.64
8.37
9.09
10.0
10.7
7{iay
(3.56-3.96)
11 (4.21-4.70)
11 (5.03-5.60)
11 (5.68-6.32) 11
(6.54-7.29) 1
1 (7.88-8.81) 11
(8.53-9.58) 11
(9.37-10.6)
(9.98-11.3)
4.31
6.08
6.02
6.76
7.76
8.53
9.31
10.1
11.1
11.8
10-day
(4.09-4.55)
11 (4.82-5.38)
11 (5.70-6.36)
11 (6.40-7.13) 1
1 (8.05-9.00) 11
(8.75-9.82) 11
(9.44-10.6)
1 (11.0-12.5)
5.95
6.99
8.10
8.97
10.1
10.9
11.8
12.5
13.5
14.2
20-day
(5.67-6.26)
(6.66-7.36)
(7.71-8.54)
(8.53-9.44)
(9.59-10.6) 11
(10.4-11.5) 11
(11.1-12.4) 1
1 (12.7-14.3)
(13.3-15.0)
7.36
8.62
9.84
10.8
11.9
12.8
13.6
14.3
15.2
15.8
30-day
(7.05-7.69)
(8.26-9.02)
(9.44-10.3)
(10.3-11.2)
(11.4-12.5) 11
(12.2-13.4) 11
(13.0-14.2) 1
1(15.0-16.6)1
9.38
10.9
12.3
13.3
14.5
15.3
16.1
16.7
17.5
18.0
45-day
(9.02-9.77)
11 (10.5-11.4)
11 (11.8-12.8)
11 (12.8-13.9) 1
1 (15.4-16.8)
(16.1-17.5)
(16.8-18.2)
(17.2-18.7)
11.3
13.2
14.7
15.8
17.1
18.0
18.7
19.4
20.2
20.6
60-day
(10.9-11.7)
(12.7-13.7)
(14.1-15.3)
(15.2-16.4)
(16.4-17.7)
(17.3-18.7)
(18.0-19.5)
(18.7-20.2)
(19.4-21.0)
(19.8-21.5)
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
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?Iat=35.5390&Ion=-82.8760&data=depth&units=english&series=pds 1 /4

5/2/22, 10:12 AM
20
c
Precipitation Frequency Data Server
Pas -based depth -duration -frequency {DDF} curves
Latitude: 35.5390 Longitude:-82.8760'
O Ff—
T
I
I
I
I I
I I
I
I
I I
I I
I
I
I I
t t
Jr t
L
N
N r{4
N rq
rq
rq
N rq
O
N Alb
A q
O
O
O
Ln O
r1
r1
rn
lO
rl
ry
rn
v In
Duration
25
20
C) F --r-- LI I I I I I i
1 2 5 10 25 50 100 200 500 1000
Average recurrence interval (years)
NOAA Atlas 14, Volume 2, Version 3 Created (GMT): Mon May 2 14:12:00 2022
Back to Top
Maps & aerials
Small scale terrain
Average recurrence
interval
{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 —
10-day
— 2fir —
20-day
— 3-trr —
30-day
— f-hr —
45-day
— 12-hr —
60-day
- 24-hr
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.htmI?Iat=35.5390&Ion=-82.8760&data=depth&units=english&series=pds 2/4

5/2/22, 10:12 AM
Precipitation Frequency Data Server
HYDER Q
0 UN TAiN
-:-'-'Canton
uprialuska
ANDERSON
MOUNTAIN
""3Lkm
2mi
h.
Law scale terrain
B1,15tol
3 E E
J0111150 C1 tye
Winston
Knoxville'
C,
N L,) R T
C
attanoaga
Greenvil le
100km
Mi SOUTH CA
Large scale map
Kingsporl Bristol
100km
.Johnson City
Large scale aerial
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds—printpage.htmI?Iat=35.5390&Ion=-82.8760&data=depth&units=english&series=pds 3/4

5/2/22, 10:12 AM
Precipitation Frequency Data Server
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?: HDSC.Questions noaa.gov
Disclaimer
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.htmI?Iat=35.5390&Ion=-82.8760&data=depth&units=english&series=pds 4/4

5/2/22, 10:14 AM
Precipitation Frequency Data Server
NOAA Atlas 14, Volume 2, Version 3
Location name: Clyde, North Carolina, USA*
�'It
Latitude: 35.539*, Longitude:-82.876*
Elevation: 2583.88 ft *
*source: ESRI Maps 'w,�w,
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
Duration
Average recurrence interval (years)
1
2
5
10
25
50
1 100
100
200
500
1000
5-min
4.02
(3.62-4.46) 1
4.75
5.74
6.49
1 (5.84-7.20) 11
7.46
(6.67-8.27)
8.20
1 (7.28-9.08)
8.93
1 (7.88-9.91)
9.65
1 (8.47-10.8)
10.6
1 (9.18-11.9)
11.3
1 (9.72-12.7)
3.21
3.80
4.59
5.19
5.95
6.52
7.09
7.65
8.37
8.90
10-min
(2.89-3.56)
(3.43-4.23) 11
(4.14-5.10) 11
(4.67-5.76) 11
(5.32-6.59)
1 (5.80-7.24)
1 (6.27-7.88)
1 (6.71-8.52)
1 (7.26-9.38)
1 (7.66-10.0)
2.68
3.19
3.87
4.38
5.02
5.50
5.98
6.43
7.02
7.45
15-min
(2.41-2.97) 11
(2.88-3.54) 11
(3.49-4.30) 11
(3.94-4.86) 11
(4.49-5.56)
1 (4.89-6.11)
1 (5.28-6.64)
1 (5.65-7.1 7)
1 (6.09-7.87)
1 (6.40-8.39)
1.83
2.20
2.75
3.17
3.72
4.15
4.58
5.01
5.59
6.03
30-min
(1.65-2.04) 11
(1.99-2.45) 1
1 (3.33-4.12)
(3.68-4.60)
1 (4.05-5.08)
1 (4.39-5.58)
1 (4.85-6.26)
1 (5.19-6.80)
1.14
1.38
1.76
2.06
2.48
2.81
3.15
3.51
4.01
4.41
60-min
(1.03-1.27)1
(1.25-1.54) 1
1 (1.86-2.29) 11
(2.21-2.74)
1 (2.50-3.12)
1 (2.79-3.50)
1 (3.08-3.91)
1 (3.48-4.49)
1 (3.79-4.96)
0.660
0.794
1.01
1.18
1.42
1.62
1.82
2.03
2.32
2.54
2-hr
(0.597-0.732)
(0.720-0.880)
(0.912-1.12) 11
(1.06-1.30) 11
(1.27-1.57)
1 (1.44-1.78)
1 (1.60-2.01)
1 (1.78-2.25)
1 (2.00-2.58)
1 (2.17-2.85)
0.462
0.551
0.694
0.813
0.982
1.12
1.27
1.43
1.65
1.82
3-hr
(0.420-0.513)
(0.500-0.611)
(0.629-0.768)
(0.734-0.897)
(0.880-1.08)
(0.998-1.24)
1 (1.12-1.40)
1 (1.25-1.58)
1 (1.42-1.84)
1 (1.55-2.04)
0.277
0.325
0.401
0.468
0.563
0.643
0.727
0.816
0.942
1.04
6-hr
(0.253-0.304)
(0.297-0.357)
(0.366-0.441)
(0.425-0.512)
(0.509-0.615)
(0.576-0.702)
(0.646-0.796)
(0.718-0.895)
(0.815-1.04)
(0.888-1.15)
0.168
0.198
0.242
0.278
0.328
0.368
0.407
0.446
0.496
0.530
12-hr
(0.155-0.184)
(0.182-0.216)
(0.222-0.263)
(0.255-0.302)
(0.300-0.356)
(0.335-0.398)
(0.369-0.441)
(0.403-0.484)
(0.445-0.541)
(0.474-0.581)
0.097
0.117
0.143
0.164
0.192
0.215
0.238
0.262
0.292
0.315
24-hr
(0.091-0.105)
(0.108-0.125)
(0.133-0.153)
(0.152-0.176)
(0.178-0.206)
(0.199-0.230)
(0.220-0.254)
(0.241-0.279)
(0.268-0.311)
(0.287-0.335)
0.058
0.069
0.083
0.095
0.111
0.124
0.136
0.149
0.166
0.178
2-day
(0.054-0.061)
(0.064-0.073)
(0.078-0.089)
(0.089-0.101)
(0.104-0.118)
(0.115-0.131)
(0.127-0.145)
(0.138-0.158)
(0.153-0.176)
(0.163-0.189)
0.041
0.049
0.059
0.067
0.078
0.086
0.094
0.102
0.113
0.121
3-day
(0.039-0.044)
(0.046-0.052)
(0.055-0.063)
(0.063-0.071)
(0.073-0.082)
(0.080-0.091)
(0.088-0.100)
(0.095-0.108)
(0.105-0.120)
(0.112-0.128)
0.033
0.039
0.047
0.053
0.061
0.067
0.073
0.079
0.087
0.092
4-day
(0.031-0.035)
(0.037-0.042)
(0.044-0.050)
(0.050-0.056)
(0.057-0.064)
(0.063-0.071)
(0.069-0.077)
(0.074-0.084)
(0.081-0.092)
(0.086-0.097)
0.022
0.026
0.032
0.036
0.041
0.045
0.050
0.054
0.060
0.064
7-day
(0.021-0.024)
(0.025-0.028)
(0.030-0.033)
(0.034-0.038)
(0.039-0.043)
(0.043-0.048)
(0.047-0.052)
(0.051-0.057)
(0.056-0.063)
(0.059-0.067)
0.018
0.021
0.025
0.028
0.032
0.036
0.039
0.042
0.046
0.049
10-day
(0.017-0.019)
(0.020-0.022)
(0.024-0.026)
(0.027-0.030)
(0.031-0.034)
(0.034-0.038)
(0.036-0.041)
(0.039-0.044)
(0.043-0.049)
(0.046-0.052)
0.012
0.015
0.017
0.019
0.021
0.023
0.024
0.026
0.028
0.030
20-day
(0.012-0.013)
(0.014-0.015)
(0.016-0.018)
(0.018-0.020)
(0.020-0.022)
(0.022-0.024)
(0.023-0.026)
(0.025-0.028)
(0.026-0.030)
(0.028-0.031)
0.010
0.012
0.014
0.015
0.017
0.018
0.019
0.020
0.021
0.022
30-day
(0.010-0.011)
(0.011-0.013)
(0.013-0.014)
(0.014-0.016)
(0.016-0.017)
(0.017-0.019)
(0.018-0.020)
(0.019-0.021)
(0.020-0.022)
(0.021-0.023)
0.009
0.010
0.011
0.012
0.013
0.014
0.015
0.016
0.016
0.017
45-day
(0.008-0.009)
(0.010-0.011)
(0.011-0.012)
(0.012-0.013)
(0.013-0.014)
(0.014-0.015)
(0.014-0.016)
(0.015-0.016)
(0.016-0.017)
(0.016-0.017)
0.008
0.009
0.010
0.011
0.012
0.012
0.013
0.013
0.014
0.014
60-day
(0.008-0.008)
(0.009-0.010)
(0.010-0.011)
(0.011-0.011)
(0.011-0.012)
(0.012-0.013)
(0.013-0.014)
(0.013-0.014)
(0.013-0.015)
(0.014-0.015)
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
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?Iat=35.5390&Ion=-82.8760&data=intensity&units=english&series=pds 1 /4

5/2/22, 10:14 AM
Precipitation Frequency Data Server
I161616I6161
10.000
C
41
1.000
C
GJ
a-�
C
� 0.100
L
Ld
a 0.010
PD5-based intensity -duration -frequency (IDF) curves
Latitude: 35.5390'. Longitude:-82.3760'
0.001
t t Jr t L N N O r{4 N rq rq rq N rq N Alb A q r, O O O Ln O
,1 r-1 rn w � N rn v Ln
Duration
100.000
10.000
L
k
1.000
w
c
e
0.100
4.1
49
0.010
0.001 i 1 1 1 1 1 1 1 1 1
1 2 5 10 25 50 100 200 500 1000
Average recurrence interval (years)
NOAA Atlas 14, Volume 2, Version 3 Created (GMT): Mon May 2 14:14:22 2022
Back to Top
Maps & aerials
Small scale terrain
Average recurrence
interval
{years}
— 1
2
— 5
— 10
— 25
50
100
200
500
1000
Duration
— 6-min —
2-day
— 10-min —
3-day
15-min —
d-dmy
— 30-min —
7-day
— 6 Wain —
1 o-day
— 2fir —
20-day
— 3-trr —
30-day
— Sfir —
45-day
— 12-h r —
60-day
- 24-hr
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.htmI?Iat=35.5390&Ion=-82.8760&data=intensity&units=english&series=pds 2/4

5/2/22, 10:14 AM
Precipitation Frequency Data Server
HYDER Q
0 UN TAiN
-:-'-'Canton
uprialuska
ANDERSON
MOUNTAIN
""3Lkm
2mi
h.
Law scale terrain
B1,15tol
3 E E
J0111150 C1 tye
Winston
Knoxville'
C,
N L,) R T
C
attanoaga
Greenvil le
100km
Mi SOUTH CA
Large scale map
Kingsporl Bristol
100km
.Johnson City
Large scale aerial
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds—printpage.htmI?Iat=35.5390&Ion=-82.8760&data=intensity&units=english&series=pds 3/4

5/2/22, 10:14 AM
Precipitation Frequency Data Server
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?: HDSC.Questions noaa.gov
Disclaimer
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.htmI?Iat=35.5390&Ion=-82.8760&data=intensity&units=english&series=pds 4/4

APPENDIX D
Drainage Area Maps

I/ / \ OTS 54
\ R 0 GT 1 64'
N01?TN \
1� �0N/ —0'— 'S��K—�D\�_ IM`-�M\E��\\mR \�J"\r�\� m'xB" D\\\\RA/\I\ NAG\ E —/`--A��` — R--\l——EA0�-
—T,—_I�/I E—/� MPI--O,I—RA
RiIIY_DIiT1/,��= /�C� H
1.93 ACRES DRAINAGE AREA "(JB
�2"
0.42 ACRES
i
"A"DRAINAGSKIMMER AREA
5.85 ACRES
If
OR
"
I I/
ci//\///'f/i//m ' /iA o�' 'f /'�'//// o. �f �j//�� ////> /. ,' /;'% o/ /'/,\/ / '/ / /// -\///"/ /// I /I/� //Ir ��,�,I/I�///�,�� -//I/�'�ro si/� /I Cl/!/�3/I /"/\ •///� /%
/
/ TEMPORARY DITCH
DRAINAGE AREA "61
If 1.25 ACRES
If
/ / � TEMPORARY DITCH
If DRAINAGE AREAIcIf
1.61 ACRES 1N
TEMPORARY DITCH m
DRAINAGE AREA "Al"
3.95 ACRES no�z/y /----- --
NCH o
I TON --f
—
/
/
/
./
I/-
/
/
I/
/
\ �/ ■ ---' / vyn V �zm I cnlo?y I w� �N "ms
iC r\ V % �•
T \ �\V \ /y._�'__ �nv1—/ // O.. ♦J. � "r •_� - 'nO�' '°Z.�°. 'cZ �" GA-�zC r OCn1v O NO�OAJr\DxZ' YNY \ �Gc1n �c>J jW\ (ADlOornFm WwroGA��NwNN� D —N I�'� N m I I I nNy
O D
cw
oll '
/ 3 Rglee 1an � I oYI nx T= o jAm
v v w e I w co C> \ .Wo �^ ,',(a' ' �q
oA \ w��ncro Fse I \\ / .o`°oD� ,/•y/7 ,', \/ ' x �?o I �' J�
n pCPm< \ W JtS OT.m `DN��'R° vW ' I �Nn
cr`�a.�p I ` �aer"R' \ m�o in I I I ovumn „� i!�/'/ �`. I 9��y I aaM A I cnrn
"DCCil
Design
Concepts, PA
NCBELS #: C-2184
PATTON COVE
EROSION CONTROL- DRAINAGE AREA
J U LY 2022

I /
OTS 54
R 0 GT 1 64'
NOPITH \
100' \ o
I CNN \<�S— J i—�''i — /✓
WET POND "A" DRAINAGE AREA
I / S 07'08'48 w
BLUE 10.08 ACRES
1.20'
ff
'//z ='N OT46�16)
xr---max
so as
o//
coo j� I I Ic-OivJ�� / //' / //'�
— _ ° P / ------
-� N C `� -___-- .4 �, / � �p vm�<
T
BYPASS AREA "A" / i
n m / /, ./ / D
/ v.'-'_i �mZ Zan oa,xin I SAD cn \ (ORANGE) 3.64 ACRES k131!\
/ cv 121Q '
T --_ ♦. ��� O�JZD �WOF i L / � \ / 3 � DC i�AW
`ram\
T v��Z� I "�aoA \ w��n cam I I ptOn�
�OpN �''JO
c��na.�p I ` nabr"� \ N��oin�
PATTON COVE
Civil
DRAINAGE AREA - POST DEVELOPMENT
Design
NCBELS #: C-2184 Concepts, PA SEPTEMBER 2022

/
PROPOSED PERMANENT DITCH
AREA: 2.59 AC
PROPOSED PERMANENT DITCH
AREA: 2.16 AC
0
PROPOSED PERMANENT DITCH '5' F o,
AREA: 0.34 AC
O v
o� pm
FAM1 1
UNIT SUMMARY
LOTS: 54
ROAD LENGTH: 1964'
PROPOSED PERMANENT DITCH '3' I /
AREA: 1.78 AC
PROPOSED PERMANENT DITCH '4'
AREA: 0.18 AC
y
NN I ���� /////// /� /%�/�� � �����///(/`✓\\ I /�
o
so7o9-49
�///�/ lull
Q aT /2 DTI //// / / A-/
\ T� 0 34 3)93/ 3-4
� ��/• //// / /// / / / I //�/�i / ////
OTC T73 3 345
d,J�// PROPOSED STRUCTURE
5 �3 34 7J/7/ �/ z \ 5 \ ✓ + / / I CATCHMENT AREAS
/ \ g � F ► / // T
6,39 s 1 /�
)T 5 304
0 4 QQ � / / 345
.4
4 �79� 41J41
/ L T
71
LO 2 LOT/ 00 8 F I /�//\\ �(�`
0/ yg l - opIS
p� 9pmm
i / ;53 \ SB { ram• — � f � // �'�� I N-'�
Yrry
\ '
/
TYPICAL BACKYARD SWALE
9rni
I�
AREA: .34 AC
o�y
/ � ( r -
N
Y
W�(SN
/
n7 m (1Nm
O�JDn
b19ozF
�o
PATTON COVE
o
v °
n �<
DRAINAGE AREA - CATCHMENT
�0w
wmw
II �=N
N`
SEPTEMBER 2022
Den
sign
N�
con PA
NCBELS #: C-2184
nNO I
�N
�m

APPENDIX E
Skimmer Basin Design Calculations

MftqG
Q To,
I.. P %,PA
Old Clyde
CDC Project No.: 12164
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
A
B
Units
Basin Type
Skimmer
Skimmer
Maximum Drainage Area
10
10
acre
Drainage Area (DA)
5.85
1.93
acre
Disturbed Area
5.85
1.93
acre
Runoff Coefficient (C)
0.5
0.5
Rainfall Intensity (I10)
7.41
7.41
in/hr
Top of Water Length
120
80
feet
Top of Water Width
60
40
feet
L/W Ratio
2.0:1
2.0:1
feet
Water Depth
2.00
2.00
feet
Side Slope Ratio
2.00
2.00
X:1
Bottom of Basin Length
112
72
feet
Bottom of Basin Width
52
32
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
21.67
7.15
cfs
Minimum Volume
10,530
3,474
cu-ft
Volume Provided
13,024
5,504
cu-ft
Minimum Surface Area
7,044
2,324
sq-ft
Surface Area Provided
7,200
1 3,200
sq-ft
SKIMMER SIZE
Drawdown Time
3
3
days
Skimmer Size
2.5
2.0
N/A
inch
Orifice Diameter
2.1
1.4
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
21xl.5'
l lxl.5'
feet
Water Depth
0.50
0.44
feet
Free -Board
1.00
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at T C
2:1 Min, 6:1 Max
2' min for Skimmer & Basin
= Lt - 2 (Slope x Depth)
= Wt - 2 (Slope x Depth)
=DAxCxI
In NC assume 3 days
Faircloth Skimmer Chart
Faircloth Orifice Factors
Notes:
1. Spillway dimensions are based on Table 6.60a "Design of Spillways" from the NC Erosion & Sediment Control Planning & Design
Manual
2. Rainfall Intensity, I, is obtained from Appendix 8.03.07 from the NC Erosion & Sediment Control Planning & Design Manual
3. Skimmer Design is based off of the Faircloth Skimmer Packet
4. Drawdown time is per NCDENR requirements
Issued 7/18/2022

APPENDIX F
Ditch Flowrate Calculations
Channel Protection
Outfall Protection

DC-7iqq
ign
COnC."JI PA
FLOWRATE CALCULATIONS
OLD CLYDE
CDC Proj ect No.: 12164
DITCH CALCULATIONS
DITCH
RUNOFF "C"
25-YEAR INTENSITY (IN/HR)
DRAINAGE
AREA AC
FLOWRATE (CFS)
TEMPORARY DITCH Al
0.40
7.46
3.95
11.79
TEMPORARY DITCH A2
0.40
7.46
1.61
4.80
TEMPORARY DITCH B1
0.40
7.46
1.25
3.73
TEMPORARY DITCH B2
0.40
7.46
0.42
1.25
PERMANENT DITCH 1
0.60
7.46
2.16
9.67
PERMANENT DITCH 2
O.60
7.46
2.59
11.59
PERMANENT DITCH 3
0.60
7.46
1.78
7.97
PERMANENT DITCH 4
0.60
7.46
1.96
8.77
PERMANENT DITCH 5
0.60
7.46
0.34
1.52
REAR YARD SWALE
0.60
7.46
0.34
1.52
Issued 9/22/2022

5/12/22, 12:12 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > TEMPORARY DITCH Al
Name
TEMPORARY DITCH Al
Discharge
11.79
Channel Slope
0.031
Channel Bottom Width
1
Left Side Slope
2
Right Side Slope
2
Low Flow Liner
Retardence Class
D 2-6 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Very Good 80-95%
Soil Type
Clay Loam (CL)
S150BN
ECMDS 7.0
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
S150BN Straight 11.79 cfs 4.77 ft/s 0.89 ft 0.034 1.9 Ibs/ft2 1.72 Ibs/ft2 1.11 STABLE D
Unvegetated
Underlying Straight 11.79 cfs 4.77 ft/s 0.89 ft 0.034 2.07 Ibs/ft2 0.96 Ibs/ft2 2.16 STABLE D
Substrate
Unreinforced Vegetation
Phase Reach Discharge Velocity
Normal Mannings N Permissible Calculated Safety Remarks Staple
Depth Shear Stress Shear Stress Factor Pattern
lnreinforced Straight 11.79 cfs 5.02 ft/s 0.86 ft 0.032 4 Ibs/ft2 1.67 Ibs/ft2 2.4 STABLE
Vegetation
Underlying Straight 11.79 cfs 5.02 ft/s 0.86 ft 0.032 2.31 Ibs/ft2 0.94 Ibs/ft2 2.46 STABLE
Substrate
https://ecmds.com/project/l 52074/channel-analysis/223903/show 1 /1

5/12/22, 12:13 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > TEMPORARY DITCH A2
Name
TEMPORARY DITCH A2
Discharge
4.8
Channel Slope
0.023
Channel Bottom Width
1
Left Side Slope
2
Right Side Slope
2
Low Flow Liner
Retardence Class
D 2-6 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Very Good 80-95%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
ECMDS 7.0
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 4.8 cfs 3.06 ft/s 0.67 ft 0.039 4 Ibs/ft2 0.96 Ibs/ft2 4.16 STABLE
Vegetation
Underlying Straight 4.8 cfs 3.06 ft/s 0.67 ft 0.039 3.47 Ibs/ft2 0.56 Ibs/ft2 6.16 STABLE
Substrate
S75BN
Phase Reach Discharge Velocity
Normal Mannings N Permissible Calculated Safety Remarks Staple
Depth Shear Stress Shear Stress Factor Pattern
S75BN Straight 4.8 cfs 3.52 ft/s 0.61 ft 0.033 1.6 Ibs/ft2 0.88 Ibs/ft2 1.82 STABLE D
Unvegetated
Underlying Straight 4.8 cfs 3.52 ft/s 0.61 ft 0.033 1.74 Ibs/ft2 0.52 Ibs/ft2 3.33 STABLE D
Substrate
https://ecmds.com/project/l 52074/channel-analysis/223903/show 1 /1

5/12/22, 12:14 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > TEMPORARY DITCH B1
Name
TEMPORARY DITCH B1
Discharge
3.73
Channel Slope
0.023
Channel Bottom Width
1
Left Side Slope
2
Right Side Slope
2
Low Flow Liner
Retardence Class
D 2-6 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Very Good 80-95%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
ECMDS 7.0
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 3.73 cfs 2.8 ft/s 0.6 ft 0.041 4 Ibs/ft2 0.87 Ibs/ft2 4.62 STABLE
Vegetation
Underlying Straight 3.73 cfs 2.8 ft/s 0.6 ft 0.041 3.71 Ibs/ft2 0.52 Ibs/ft2 7.18 STABLE
Substrate
S75BN
Phase Reach Discharge Velocity
Normal Mannings N Permissible Calculated Safety Remarks Staple
Depth Shear Stress Shear Stress Factor Pattern
S75BN Straight 3.73 cfs 3.26 ft/s 0.55 ft 0.033 1.6 Ibs/ft2 0.78 Ibs/ft2 2.04 STABLE D
Unvegetated
Underlying Straight 3.73 cfs 3.26 ft/s 0.55 ft 0.033 1.74 Ibs/ft2 0.48 Ibs/ft2 3.66 STABLE D
Substrate
https://ecmds.com/project/l 52074/channel-analysis/223903/show 1 /1

5/12/22, 12:16 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > TEMPORARY DITCH B2
Name
TEMPORARY DITCH B2
Discharge
1.25
Channel Slope
0.033
Channel Bottom Width
1
Left Side Slope
2
Right Side Slope
2
Low Flow Liner
Retardence Class
D 2-6 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Very Good 80-95%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
ECMDS 7.0
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 1.25 cfs 2.3 ft/s 0.33 ft 0.043 4 Ibs/ft2 0.68 Ibs/ft2 5.91 STABLE
Vegetation
Underlying Straight 1.25 cfs 2.3 ft/s 0.33 ft 0.043 4 Ibs/ft2 0.45 Ibs/ft2 8.81 STABLE
Substrate
S75BN
Phase Reach Discharge Velocity
Normal Mannings N Permissible Calculated Safety Remarks Staple
Depth Shear Stress Shear Stress Factor Pattern
S75BN Straight 1.25 cfs 2.73 ft/s 0.29 ft 0.034 1.6 Ibs/ft2 0.6 Ibs/ft2 2.68 STABLE D
Unvegetated
Underlying Straight 1.25 cfs 2.73 ft/s 0.29 ft 0.034 1.74 Ibs/ft2 0.41 Ibs/ft2 4.25 STABLE D
Substrate
https://ecmds.com/project/l 52074/channel-analysis/223903/show 1 /1

9/22/22, 9:35 AM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > PEMANENT DITCH 1
Name
PEMANENT DITCH 1
Discharge
9.67
Channel Slope
0.05
Channel Bottom Width
0
Left Side Slope
2
Right Side Slope
2
Low Flow Liner
Retardence Class
D 2-6 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Very Good 80-95%
Soil Type
Clay Loam (CL)
C125BN
ECMDS 7.0
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
C125BN Straight 9.67 cfs 6.65 ft/s 0.85 ft 0.026 2.8 Ibs/ft2 2.66 Ibs/ft2 1.05 STABLE D
Unvegetated
Underlying Straight 9.67 cfs 6.65 ft/s 0.85 ft 0.026 3.05 Ibs/ft2 1.19 Ibs/ft2 2.57 STABLE D
Substrate
Unreinforced Vegetation
Phase Reach Discharge Velocity
Normal Mannings N Permissible Calculated Safety Remarks Staple
Depth Shear Stress Shear Stress Factor Pattern
lnreinforced Straight 9.67 cfs 6.21 ft/s 0.88 ft 0.029 4 Ibs/ft2 2.75 Ibs/ft2 1.45 STABLE
Vegetation
Underlying Straight 9.67 cfs 6.21 ft/s 0.88 ft 0.029 1.85 Ibs/ft2 1.23 Ibs/ft2 1.5 STABLE
Substrate
https://ecmds.com/project/l 52074/channel-analysis/231629/show 1 /1

9/22/22, 9:40 AM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > PERMANENT DITCH 2
Name
PERMANENT DITCH 2
Discharge
11.59
Channel Slope
0.036
Channel Bottom Width
0
Left Side Slope
2
Right Side Slope
2
Low Flow Liner
Retardence Class
D 2-6 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Very Good 80-95%
Soil Type
Clay Loam (CL)
C125BN
ECMDS 7.0
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
C125BN Straight 11.59 cfs 6 ft/s 0.98 ft 0.027 2.8 Ibs/ft2 2.2 Ibs/ft2 1.27 STABLE D
Unvegetated
Underlying Straight 11.59 cfs 6 ft/s 0.98 ft 0.027 3.05 Ibs/ft2 0.98 Ibs/ft2 3.1 STABLE D
Substrate
Unreinforced Vegetation
Phase Reach Discharge Velocity
Normal Mannings N Permissible Calculated Safety Remarks Staple
Depth Shear Stress Shear Stress Factor Pattern
lnreinforced Straight 11.59 cfs 5.45 ft/s 1.03 ft 0.031 4 Ibs/ft2 2.32 Ibs/ft2 1.73 STABLE
Vegetation
Underlying Straight 11.59 cfs 5.45 ft/s 1.03 ft 0.031 2.13 Ibs/ft2 1.04 Ibs/ft2 2.05 STABLE
Substrate
https://ecmds.com/project/l 52074/channel-analysis/231630/show 1 /1

9/22/22, 10:30 AM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > PERMANENT DITCH 3
Name
PERMANENT DITCH 3
Discharge
7.97
Channel Slope
0.03
Channel Bottom Width
0
Left Side Slope
2
Right Side Slope
2
Low Flow Liner
Retardence Class
D 2-6 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Very Good 80-95%
Soil Type
Clay Loam (CL)
C125BN
ECMDS 7.0
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
C125BN Straight 7.97 cfs 4.95 ft/s 0.9 ft 0.028 2.8 Ibs/ft2 1.68 Ibs/ft2 1.67 STABLE D
Unvegetated
Underlying Straight 7.97 cfs 4.95 ft/s 0.9 ft 0.028 3.05 Ibs/ft2 0.75 Ibs/ft2 4.06 STABLE D
Substrate
Unreinforced Vegetation
Phase Reach Discharge Velocity
Normal Mannings N Permissible Calculated Safety Remarks Staple
Depth Shear Stress Shear Stress Factor Pattern
lnreinforced Straight 7.97 cfs 4.3 ft/s 0.96 ft 0.034 4 Ibs/ft2 1.8 Ibs/ft2 2.22 STABLE
Vegetation
Underlying Straight 7.97 cfs 4.3 ft/s 0.96 ft 0.034 2.6 Ibs/ft2 0.81 Ibs/ft2 3.23 STABLE
Substrate
https://ecmds.com/project/l 52074/channel-analysis/231657/show 1 /1

9/22/22, 9:58 AM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > PERMANENT DITCH 4
Name
PERMANENT DITCH 4
Discharge
8.77
Channel Slope
0.12
Channel Bottom Width
2
Left Side Slope
2
Right Side Slope
2
Low Flow Liner
Retardence Class
C 6-12 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Very Good 80-95%
Soil Type
Clay Loam (CL)
C125BN
ECMDS 7.0
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
C125BN Straight 8.77 cfs 8.91 ft/s 0.36 ft 0.024 2.8 Ibs/ft2 2.68 Ibs/ft2 1.05 STABLE D
Unvegetated
Underlying Straight 8.77 cfs 8.91 ft/s 0.36 ft 0.024 3.05 Ibs/ft2 2.02 Ibs/ft2 1.51 STABLE D
Substrate
Unreinforced Vegetation
Phase Reach Discharge Velocity
Normal Mannings N Permissible Calculated Safety Remarks Staple
Depth Shear Stress Shear Stress Factor Pattern
lnreinforced Straight 8.77 cfs 7.13 ft/s 0.43 ft 0.033 4 Ibs/ft2 3.22 Ibs/ft2 1.24 STABLE
Vegetation
Underlying Straight 8.77 cfs 7.13 ft/s 0.43 ft 0.033 2.48 Ibs/ft2 2.35 Ibs/ft2 1.06 STABLE
Substrate
https://ecmds.com/project/l 52074/channel-analysis/231631 /show 1 /1

9/22/22, 9:54 AM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > PERMANENT DITCH 5
Name
PERMANENT DITCH 5
Discharge
1.52
Channel Slope
0.054
Channel Bottom Width
0
Left Side Slope
2
Right Side Slope
2
Low Flow Liner
Retardence Class
D 2-6 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Very Good 80-95%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
ECMDS 7.0
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 1.52 cfs 3.41 ft/s 0.47 ft 0.036 4 Ibs/ft2 1.59 Ibs/ft2 2.51 STABLE
Vegetation
Underlying Straight 1.52 cfs 3.41 ft/s 0.47 ft 0.036 2.87 Ibs/ft2 0.71 Ibs/ft2 4.04 STABLE
Substrate
S75BN
Phase Reach Discharge Velocity
Normal Mannings N Permissible Calculated Safety Remarks Staple
Depth Shear Stress Shear Stress Factor Pattern
S75BN Straight 1.52 cfs 3.75 ft/s 0.45 ft 0.032 1.6 Ibs/ft2 1.52 Ibs/ft2 1.06 STABLE D
Unvegetated
Underlying Straight 1.52 cfs 3.75 ft/s 0.45 ft 0.032 1.74 Ibs/ft2 0.68 Ibs/ft2 2.57 STABLE D
Substrate
https://ecmds.com/project/l 52074/channel-analysis/231632/show 1 /1

9/22/22, 10:27 AM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > REAR YARD SWALE
Name
REAR YARD SWALE
Discharge
1.52
Channel Slope
0.01
Channel Bottom Width
0
Left Side Slope
2
Right Side Slope
2
Low Flow Liner
Retardence Class
D 2-6 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Very Good 80-95%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
ECMDS 7.0
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 1.52 cfs 1.27 ft/s 0.77 ft 0.058 4 Ibs/ft2 0.48 Ibs/ft2 8.28 STABLE
Vegetation
Underlying Straight 1.52 cfs 1.27 ft/s 0.77 ft 0.058 4 Ibs/ft2 0.22 Ibs/ft2 18.51 STABLE
Substrate
S75BN
Phase Reach Discharge Velocity
Normal Mannings N Permissible Calculated Safety Remarks Staple
Depth Shear Stress Shear Stress Factor Pattern
S75BN Straight 1.52 cfs 1.75 ft/s 0.66 ft 0.038 1.6 Ibs/ft2 0.41 Ibs/ft2 3.89 STABLE D
Unvegetated
Underlying Straight 1.52 cfs 1.75 ft/s 0.66 ft 0.038 1.74 Ibs/ft2 0.18 Ibs/ft2 9.49 STABLE D
Substrate
https://ecmds.com/project/l 52074/channel-analysis/231633/show 1 /1

Appendices
Curves may not be extrapolated.
Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition (Tw < 0.5 diameter).
STRUCTURE: Skimmer LENGTH: 10
DISCHARGE: 1 cfs WIDTH: 11
PIPE DIA. (D) 6 in d50: 0.5 ft
DEPTH: 1.5 ft
Rev. 12/93 8.06.3

Appendices
30
l�l
Outlet W = Do + La
pipe I
diameter (Do)
La —mot
T ilwater < 0.5DD
APRON DEPTH IS 1.5 TIMES THE STONE ��®�
DIAMETER (18" MINIMUM DEPTH) A �I t
10 FT
(MIN. LENGTH)
rpt 601
50
80..I:
2 N
Q
CSS
Q
O
LO
1 -o
0.50 FT
(MIN.d50)
.i ..i. . •I II i..111.i.. I I I II I L L � illll III'Il. II � I. I I.i I '.I L 10
3 5 10 20 50 100 200 500 1000
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 (Tw < 0.5 diameter).
STRUCTURE: Wet Pond'A' LENGTH: 20
DISCHARGE: 34.5 CFS WIDTH: 23 ft
PIPE DIA. (D) 36 in d50: 0.6 ft
DEPTH: 1.5 ft
Rev. 12/93 8.06.3

Appendices
Curves may not be extrapolated.
Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition (Tw < 0.5 diameter).
STRUCTURE: Permanent Ditch 4 LENGTH: 11
DISCHARGE: 8.77 cfs WIDTH: 17 ft
PIPE DIA. (D) 15 in equivalent d5O: 0.5 ft
DEPTH: 1.5 ft
Rev. 12/93 8.06.3

APPENDIX G
Permanent Pond and Forebay Volumes (HydroCAD)

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 7/19/2022
HydroCAD® 10.20-2d s/n 11595 © 2021 HydroCAD Software Solutions LLC Page 1
Summary for Pond 2PF: WET POND FOREBAY
Volume
Invert Avail.Storage
Storage Description
#1
2,572.50'
6,447 cf
Custom Stage Data (Irregular)
Listed
below (Recalc)
Elevation
Surf.Area
Perim.
Inc.Store
Cum.Store
Wet.Area
(feet)
(sq-ft)
(feet)
(cubic -feet)
(cubic -feet)
(sq-ft)
2,572.50
712
128.8
0
0
712
2,576.50
2,729
206.0
6,447
6,447
2,875
Summary for Pond 2PM: WET POND PERMANENT POOL
Volume
Invert Avail.Storage
Storage Description
#1
2,572.50'
36,447 cf
Custom Stage Data (Irregular)
Listed
below (Recalc)
Elevation
Surf.Area
Perim.
Inc.Store
Cum.Store
Wet.Area
(feet)
(sq-ft)
(feet)
(cubic -feet)
(cubic -feet)
(sq-ft)
2,572.50
7,461
350.5
0
0
7,461
2,576.50
10,869
407.0
36,447
36,447
11,189

APPENDIX H
1-Year Storm Event HydroCAD Output Report

1S (22S (3.] S
PRE P ST BYPASS
2 v 4L
WET POND TOTAL
Subcat Reach on Link Routing Diagram for 12164 STORMWATER ANALYSIS
Prepared by Civil Design Concepts, Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1 S: PRE
Runoff = 5.19 cfs @ 12.06 hrs, Volume= 17,446 cf, Depth= 0.35"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
Type II 24-hr 1-Year Rainfall=2.34"
Area (sf) CN Description
12,934
98 Unconnected roofs, HSG C
3,164
96 Gravel surface, HSG C
258,919
61 Pasture/grassland/range, Good, HSG B
208,869
74 Pasture/grassland/range, Good, HSG C
48,800
80 Pasture/grassland/range, Good, HSG D
65,245
72 Woods/grass comb., Good, HSG C
597,931
69 Weighted Average
584,997
97.84% Pervious Area
12,934
2.16% Impervious Area
12,934
100.00% Unconnected
Tc Length
Slope Velocity Capacity Description
(min) (feet)
(ft/ft) (ft/sec) (cfs)
5.4 100
0.0800 0.31 Sheet Flow,
Range n= 0.130 P2= 2.80"
5.0 534
0.0640 1.77 Shallow Concentrated Flow,
Short Grass Pasture Kv= 7.0 fps
10.4 634 Total

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type // 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 3
Subcatchment 1S: PRE
Hydrograph
N
U
3
0
LL
■ Runoff

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/20/2022
HvdroCAD® 10.20-2f s/n 04679 © 2022 HvdroCAD Software Solutions LLC Paae 4
Summary for Subcatchment 2S: POST
Runoff = 16.62 cfs @ 12.00 hrs, Volume= 38,528 cf, Depth= 1.05"
Routed to Pond 2P : WET POND
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
Type II 24-hr 1-Year Rainfall=2.34"
Area (sf) CN Description
24,419
98
Paved roads w/curbs & sewers, HSG B
18,685
98
Paved roads w/curbs & sewers, HSG C
12,823
73
1/7 acre lots, 58% imp, HSG A
192,320
83
1/7 acre lots, 58% imp, HSG B
157,720
88
1/7 acre lots, 58% imp, HSG C
4,641
39
>75% Grass cover, Good, HSG A
14,337
61
>75% Grass cover, Good, HSG B
14,363
98
Water Surface, HSG B
439,308
85
Weighted Average
171,380
39.01 % Pervious Area
267,928
60.99% Impervious Area
Tc
Length
Slope
Velocity
Capacity Description
(min)
(feet)
(ft/ft)
(ft/sec)
(cfs)
6.1
100
0.1000
0.27
Sheet Flow,
Cultivated: Residue>20% n= 0.170 P2= 2.80"
2.0
383
0.1200
3.12
Shallow Concentrated Flow,
Cultivated Straight Rows Kv= 9.0 fps
0.5
350
0.0200
11.03
34.66 Pipe Channel,
24.0" Round Area= 3.1 sf Perim= 6.3' r= 0.50'
n= 0.012
8.6 833 Total

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type // 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/20/2022
HvdroCAD® 10.20-2f s/n 04679 © 2022 HvdroCAD Software Solutions LLC Paae 5
Subcatchment 2S: POST
Hydrograph
■ Runoff
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 3S: BYPASS
Runoff = 1.21 cfs @ 12.02 hrs, Volume= 3,864 cf, Depth= 0.29"
Routed to Link 4L : TOTAL
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
Type II 24-hr 1-Year Rainfall=2.34"
Area (sf) CN Description
2,060
98
Paved roads w/curbs & sewers, HSG B
3,797
73
1/7 acre lots, 58% imp, HSG A
27,510
83
1/7 acre lots, 58% imp, HSG B
9,332
88
1/7 acre lots, 58% imp, HSG C
32,050
39
>75% Grass cover, Good, HSG A
26,174
61
>75% Grass cover, Good, HSG B
57,700
74
>75% Grass cover, Good, HSG C
158,623
67
Weighted Average
132,992
83.84% Pervious Area
25,631
16.16% Impervious Area
Tc
Length
Slope
Velocity
Capacity Description
(min)
(feet)
(ft/ft)
(ft/sec)
(cfs)
6.3
100
0.1800
0.26
Sheet Flow,
Grass: Dense n= 0.240 P2= 2.80"
1.2
130
0.0690
1.84
Shallow Concentrated Flow,
Short Grass Pasture Kv= 7.0 fps
7.5 230 Total

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type // 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 7
Subcatchment 3S: BYPASS
Hydrograph
N
U
3
0
LL
❑ Runoff

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/20/2022
HvdroCAD® 10.20-2f s/n 04679 © 2022 HvdroCAD Software Solutions LLC Paae 8
Summary for Pond 2P: WET POND
Inflow Area =
439,308 sf,
60.99% Impervious,
Inflow Depth = 1.05" for 1-Year event
Inflow =
16.62 cfs @
12.00 hrs, Volume=
38,528 cf
Outflow =
1.50 cfs @
12.64 hrs, Volume=
38,486 cf, Atten= 91 %, Lag= 38.3 min
Primary =
1.50 cfs @
12.64 hrs, Volume=
38,486 cf
Routed to Link 4L : TOTAL
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
Peak Elev= 2,577.63' @ 12.64 hrs Surf.Area= 17,626 sf Storage= 18,130 cf
Plug -Flow detention time= 245.4 min calculated for 38,486 cf (100% of inflow)
Center -of -Mass det. time= 244.7 min ( 1,084.8 - 840.1 )
Volume Invert Avail.Storaae Storaae Description
#1
2,576.50'
75,502 cf
Custom Stage Data (Irregular) Listed below (Recalc)
Elevation
Surf.Area
Perim.
Inc.Store
Cum.Store
Wet.Area
(feet)
(sq-ft)
(feet)
(cubic -feet)
(cubic -feet)
(sq-ft)
2,576.50
14,363
491.2
0
0
14,363
2,577.50
17,423
528.9
15,868
15,868
17,466
2,580.50
22,438
585.4
59,633
75,502
22,747
Device
Routing
Invert
Outlet Devices
#1
Primary
2,571.50'
30.0" Round Culvert
L= 43.0' CPP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 2,571.50' / 2,571.10' S= 0.0093'/' Cc= 0.900
n= 0.012, Flow Area= 4.91 sf
#2
Device 1
2,576.50'
8.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#3
Device 1
2,578.00'
36.0" W x 4.0" H Vert. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#4
Device 1
2,579.00'
60.0" x 60.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
Primary OutFlow Max=1.50 cfs @ 12.64 hrs HW=2,577.63' (Free Discharge)
L1=Culvert (Passes 1.50 cfs of 52.21 cfs potential flow)
2=Orifice/Grate (Orifice Controls 1.50 cfs @ 4.29 fps)
3=Orifice/Grate ( Controls 0.00 cfs)
=Orifice/Grate ( Controls 0.00 cfs)

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type // 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/20/2022
HvdroCAD® 10.20-2f s/n 04679 © 2022 HvdroCAD Software Solutions LLC Paae 9
1
1
1
1
1
1
1
1
N
u 1
3
0
LL
Pond 2P: WET POND
Hydrograph
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
FL-1 n —fI o—w
❑ Primary

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/20/2022
HvdroCAD® 10.20-2f s/n 04679 © 2022 HvdroCAD Software Solutions LLC Paae 10
Summary for Link 4L: TOTAL
Inflow Area = 597,931 sf, 49.10% Impervious, Inflow Depth > 0.85" for 1-Year event
Inflow = 2.21 cfs @ 12.04 hrs, Volume= 42,350 cf
Primary = 2.21 cfs @ 12.04 hrs, Volume= 42,350 cf, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
❑ Inflow
❑ Primary
N
U
3
0
LL

APPENDIX I
10-Year Storm Event
HydroCAD Output Report

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 1124-hr 10-Year Rainfall=3.93"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 11
Summary for Subcatchment 1 S: PRE
Runoff = 23.39 cfs @ 12.03 hrs, Volume= 60,857 cf, Depth= 1.22"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
Type II 24-hr 10-Year Rainfall=3.93"
Area (sf) CN Description
12,934
98 Unconnected roofs, HSG C
3,164
96 Gravel surface, HSG C
258,919
61 Pasture/grassland/range, Good, HSG B
208,869
74 Pasture/grassland/range, Good, HSG C
48,800
80 Pasture/grassland/range, Good, HSG D
65,245
72 Woods/grass comb., Good, HSG C
597,931
69 Weighted Average
584,997
97.84% Pervious Area
12,934
2.16% Impervious Area
12,934
100.00% Unconnected
Tc Length
Slope Velocity Capacity Description
(min) (feet)
(ft/ft) (ft/sec) (cfs)
5.4 100
0.0800 0.31 Sheet Flow,
Range n= 0.130 P2= 2.80"
5.0 534
0.0640 1.77 Shallow Concentrated Flow,
Short Grass Pasture Kv= 7.0 fps
10.4 634 Total

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 1124-hr 10-Year Rainfall=3.93"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 12
Subcatchment 1S: PRE
Hydrograph
■ Runoff
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 1124-hr 10-Year Rainfall=3.93"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 13
Summary for Subcatchment 2S: POST
Runoff = 37.43 cfs @ 12.00 hrs, Volume= 87,691 cf, Depth= 2.40"
Routed to Pond 2P : WET POND
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
Type II 24-hr 10-Year Rainfall=3.93"
Area (sf) CN Description
24,419
98
Paved roads w/curbs & sewers, HSG B
18,685
98
Paved roads w/curbs & sewers, HSG C
12,823
73
1/7 acre lots, 58% imp, HSG A
192,320
83
1/7 acre lots, 58% imp, HSG B
157,720
88
1/7 acre lots, 58% imp, HSG C
4,641
39
>75% Grass cover, Good, HSG A
14,337
61
>75% Grass cover, Good, HSG B
14,363
98
Water Surface, HSG B
439,308
85
Weighted Average
171,380
39.01 % Pervious Area
267,928
60.99% Impervious Area
Tc
Length
Slope
Velocity
Capacity Description
(min)
(feet)
(ft/ft)
(ft/sec)
(cfs)
6.1
100
0.1000
0.27
Sheet Flow,
Cultivated: Residue>20% n= 0.170 P2= 2.80"
2.0
383
0.1200
3.12
Shallow Concentrated Flow,
Cultivated Straight Rows Kv= 9.0 fps
0.5
350
0.0200
11.03
34.66 Pipe Channel,
24.0" Round Area= 3.1 sf Perim= 6.3' r= 0.50'
n= 0.012
8.6 833 Total

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 1124-hr 10-Year Rainfall=3.93"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 14
Subcatchment 2S: POST
Hydrograph
■ Runoff
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 1124-hr 10-Year Rainfall=3.93"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 15
Summary for Subcatchment 3S: BYPASS
Runoff = 6.30 cfs @ 12.00 hrs, Volume= 14,566 cf, Depth= 1.10"
Routed to Link 4L : TOTAL
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
Type II 24-hr 10-Year Rainfall=3.93"
Area (sf) CN Description
2,060
98
Paved roads w/curbs & sewers, HSG B
3,797
73
1/7 acre lots, 58% imp, HSG A
27,510
83
1/7 acre lots, 58% imp, HSG B
9,332
88
1/7 acre lots, 58% imp, HSG C
32,050
39
>75% Grass cover, Good, HSG A
26,174
61
>75% Grass cover, Good, HSG B
57,700
74
>75% Grass cover, Good, HSG C
158,623
67
Weighted Average
132,992
83.84% Pervious Area
25,631
16.16% Impervious Area
Tc
Length
Slope
Velocity
Capacity Description
(min)
(feet)
(ft/ft)
(ft/sec)
(cfs)
6.3
100
0.1800
0.26
Sheet Flow,
Grass: Dense n= 0.240 P2= 2.80"
1.2
130
0.0690
1.84
Shallow Concentrated Flow,
Short Grass Pasture Kv= 7.0 fps
7.5 230 Total

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 1124-hr 10-Year Rainfall=3.93"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 16
Subcatchment 3S: BYPASS
Hydrograph
N
U
3
0
LL
■ Runoff

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 1124-hr 10-Year Rainfall=3.93"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 17
Summary for Pond 2P: WET POND
Inflow Area =
439,308 sf,
60.99% Impervious,
Inflow Depth = 2.40" for 10-Year event
Inflow =
37.43 cfs @
12.00 hrs, Volume=
87,691 cf
Outflow =
6.30 cfs @
12.28 hrs, Volume=
87,647 cf, Atten= 83%, Lag= 17.2 min
Primary =
6.30 cfs @
12.28 hrs, Volume=
87,647 cf
Routed to Link 4L : TOTAL
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
Peak Elev= 2,578.84' @ 12.28 hrs Surf.Area= 19,577 sf Storage= 40,557 cf
Plug -Flow detention time= 191.7 min calculated for 87,647 cf (100% of inflow)
Center -of -Mass det. time= 191.3 min ( 1,007.9 - 816.6 )
Volume Invert Avail.Storaae Storaae Description
#1
2,576.50'
75,502 cf
Custom Stage Data (Irregular) Listed below (Recalc)
Elevation
Surf.Area
Perim.
Inc.Store
Cum.Store
Wet.Area
(feet)
(sq-ft)
(feet)
(cubic -feet)
(cubic -feet)
(sq-ft)
2,576.50
14,363
491.2
0
0
14,363
2,577.50
17,423
528.9
15,868
15,868
17,466
2,580.50
22,438
585.4
59,633
75,502
22,747
Device
Routing
Invert
Outlet Devices
#1
Primary
2,571.50'
30.0" Round Culvert
L= 43.0' CPP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 2,571.50' / 2,571.10' S= 0.0093'/' Cc= 0.900
n= 0.012, Flow Area= 4.91 sf
#2
Device 1
2,576.50'
8.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#3
Device 1
2,578.00'
36.0" W x 4.0" H Vert. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#4
Device 1
2,579.00'
60.0" x 60.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
Primary OutFlow Max=6.30 cfs @ 12.28 hrs HW=2,578.83' (Free Discharge)
L1=Culvert (Passes 6.30 cfs of 58.29 cfs potential flow)
2=Orifice/Grate (Orifice Controls 2.38 cfs @ 6.81 fps)
3=Orifice/Grate (Orifice Controls 3.92 cfs @ 3.92 fps)
=Orifice/Grate ( Controls 0.00 cfs)

12164 STORMWATER ANALYSIS
Prepared by Civil Design Concepts
HvdroCAD® 10.20-2f s/n 04679 © 2022 H
Patton Cove Subdivision
Type 1124-hr 10-Year Rainfall=3.93"
roCAD Software Solutions LLC
Pond 2P: WET POND
Hydrograph
Printed 9/20/2022
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
Paae 18
FL-1 n —fI o—w
❑ Primary

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 1124-hr 10-Year Rainfall=3.93"
Prepared by Civil Design Concepts Printed 9/20/2022
HvdroCAD® 10.20-2f s/n 04679 © 2022 HvdroCAD Software Solutions LLC Paae 19
Summary for Link 4L: TOTAL
Inflow Area = 597,931 sf, 49.10% Impervious, Inflow Depth = 2.05" for 10-Year event
Inflow = 9.39 cfs @ 12.06 hrs, Volume= 102,213 cf
Primary = 9.39 cfs @ 12.06 hrs, Volume= 102,213 cf, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
E
Link 4L: TOTAL
Hydrograph
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
❑ Inflow
❑ Primary

APPENDIX J
50-Year Storm Event
HydroCAD Output Report

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 50-Year Rainfall=5.17"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 20
Summary for Subcatchment 1 S: PRE
Runoff = 41.15 cfs @ 12.02 hrs, Volume= 103,731 cf, Depth= 2.08"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
Type II 24-hr 50-Year Rainfall=5.17"
Area (sf) CN Description
12,934
98 Unconnected roofs, HSG C
3,164
96 Gravel surface, HSG C
258,919
61 Pasture/grassland/range, Good, HSG B
208,869
74 Pasture/grassland/range, Good, HSG C
48,800
80 Pasture/grassland/range, Good, HSG D
65,245
72 Woods/grass comb., Good, HSG C
597,931
69 Weighted Average
584,997
97.84% Pervious Area
12,934
2.16% Impervious Area
12,934
100.00% Unconnected
Tc Length
Slope Velocity Capacity Description
(min) (feet)
(ft/ft) (ft/sec) (cfs)
5.4 100
0.0800 0.31 Sheet Flow,
Range n= 0.130 P2= 2.80"
5.0 534
0.0640 1.77 Shallow Concentrated Flow,
Short Grass Pasture Kv= 7.0 fps
10.4 634 Total

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 50-Year Rainfall=5.17"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 21
Subcatchment 1S: PRE
Hydrograph
■ Runoff
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 50-Year Rainfall=5.17"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 22
Summary for Subcatchment 2S: POST
Runoff = 54.25 cfs @ 11.99 hrs, Volume= 129,065 cf, Depth= 3.53"
Routed to Pond 2P : WET POND
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
Type II 24-hr 50-Year Rainfall=5.17"
Area (sf) CN Description
24,419
98
Paved roads w/curbs & sewers, HSG B
18,685
98
Paved roads w/curbs & sewers, HSG C
12,823
73
1/7 acre lots, 58% imp, HSG A
192,320
83
1/7 acre lots, 58% imp, HSG B
157,720
88
1/7 acre lots, 58% imp, HSG C
4,641
39
>75% Grass cover, Good, HSG A
14,337
61
>75% Grass cover, Good, HSG B
14,363
98
Water Surface, HSG B
439,308
85
Weighted Average
171,380
39.01 % Pervious Area
267,928
60.99% Impervious Area
Tc
Length
Slope
Velocity
Capacity Description
(min)
(feet)
(ft/ft)
(ft/sec)
(cfs)
6.1
100
0.1000
0.27
Sheet Flow,
Cultivated: Residue>20% n= 0.170 P2= 2.80"
2.0
383
0.1200
3.12
Shallow Concentrated Flow,
Cultivated Straight Rows Kv= 9.0 fps
0.5
350
0.0200
11.03
34.66 Pipe Channel,
24.0" Round Area= 3.1 sf Perim= 6.3' r= 0.50'
n= 0.012
8.6 833 Total

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type // 24-hr 50-Year Rainfall=5.17"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 23
Subcatchment 2S: POST
Hydrograph
■ Runoff
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 50-Year Rainfall=5.17"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 24
Summary for Subcatchment 3S: BYPASS
Runoff = 11.32 cfs @ 11.99 hrs, Volume= 25,411 cf, Depth= 1.92"
Routed to Link 4L : TOTAL
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
Type II 24-hr 50-Year Rainfall=5.17"
Area (sf) CN Description
2,060
98
Paved roads w/curbs & sewers, HSG B
3,797
73
1/7 acre lots, 58% imp, HSG A
27,510
83
1/7 acre lots, 58% imp, HSG B
9,332
88
1/7 acre lots, 58% imp, HSG C
32,050
39
>75% Grass cover, Good, HSG A
26,174
61
>75% Grass cover, Good, HSG B
57,700
74
>75% Grass cover, Good, HSG C
158,623
67
Weighted Average
132,992
83.84% Pervious Area
25,631
16.16% Impervious Area
Tc
Length
Slope
Velocity
Capacity Description
(min)
(feet)
(ft/ft)
(ft/sec)
(cfs)
6.3
100
0.1800
0.26
Sheet Flow,
Grass: Dense n= 0.240 P2= 2.80"
1.2
130
0.0690
1.84
Shallow Concentrated Flow,
Short Grass Pasture Kv= 7.0 fps
7.5 230 Total

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type // 24-hr 50-Year Rainfall=5.17"
Prepared by Civil Design Concepts Printed 9/20/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 25
Subcatchment 3S: BYPASS
Hydrograph
■ Runoff
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)

12164 STORMWATER ANALYSIS
Prepared by Civil Design Concepts
HvdroCADO 10.20-2f s/n 04679 © 2022 H
Patton Cove Subdivision
Type 11 24-hr 50-Year Rainfall=5.17"
roCAD Software Solutions LLC
Printed 9/20/2022
Paae 26
Summary for Pond 2P: WET POND
Inflow Area =
439,308 sf,
60.99% Impervious,
Inflow Depth = 3.53" for 50-Year event
Inflow =
54.25 cfs @
11.99 hrs, Volume=
129,065 cf
Outflow =
25.30 cfs @
12.14 hrs, Volume=
129,020 cf, Atten= 53%, Lag= 8.9 min
Primary =
25.30 cfs @
12.14 hrs, Volume=
129,020 cf
Routed to Link 4L : TOTAL
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
Peak Elev= 2,579.41' @ 12.14 hrs Surf.Area= 20,545 sf Storage= 52,114 cf
Plug -Flow detention time= 157.7 min calculated for 129,020 cf (100% of inflow)
Center -of -Mass det. time= 157.4 min ( 962.9 - 805.6 )
►1[.7 ..[R'iT� ��iGnF111
Description
#1
2,576.50'
75,502 cf
Custom Stage Data (Irregular) Listed below (Recalc)
Elevation
Surf.Area
Perim.
Inc.Store
Cum.Store
Wet.Area
(feet)
(sq-ft)
(feet)
(cubic -feet)
(cubic -feet)
(sq-ft)
2,576.50
14,363
491.2
0
0
14,363
2,577.50
17,423
528.9
15,868
15,868
17,466
2,580.50
22,438
585.4
59,633
75,502
22,747
Device
Routing
Invert
Outlet Devices
#1
Primary
2,571.50'
30.0" Round Culvert
L= 43.0' CPP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 2,571.50' / 2,571.10' S= 0.0093'/' Cc= 0.900
n= 0.012, Flow Area= 4.91 sf
#2
Device 1
2,576.50'
8.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#3
Device 1
2,578.00'
36.0" W x 4.0" H Vert. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#4
Device 1
2,579.00'
60.0" x 60.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
Primary OutFlow Max=24.45 cfs @ 12.14 hrs HW=2,579.40' (Free Discharge)
L1=Culvert (Passes 24.45 cfs of 60.94 cfs potential flow)
2=Orifice/Grate (Orifice Controls 2.69 cfs @ 7.71 fps)
3=Orifice/Grate (Orifice Controls 5.34 cfs @ 5.34 fps)
=Orifice/Grate (Weir Controls 16.42 cfs @ 2.06 fps)

12164 STORMWATER ANALYSIS
Prepared by Civil Design Concepts
HvdroCAD® 10.20-2f s/n 04679 © 2022 H
Patton Cove Subdivision
Type // 24-hr 50-Year Rainfall=5.17"
roCAD Software Solutions LLC
Pond 2P: WET POND
Hydrograph
Printed 9/20/2022
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
Paae 27
F7 Inflow
❑ Primary

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 50-Year Rainfall=5.17"
Prepared by Civil Design Concepts Printed 9/20/2022
HvdroCAD® 10.20-2f s/n 04679 © 2022 HvdroCAD Software Solutions LLC Paae 28
Summary for Link 4L: TOTAL
Inflow Area = 597,931 sf, 49.10% Impervious, Inflow Depth = 3.10" for 50-Year event
Inflow = 30.33 cfs @ 12.11 hrs, Volume= 154,431 cf
Primary = 30.33 cfs @ 12.11 hrs, Volume= 154,431 cf, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.08 hrs
N
U
3
0
LL
Link 4L: TOTAL
Hydrograph
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
Time (hours)
❑ Inflow
❑ Primary

APPENDIX K
Drawdown HydroCAD Output Report

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/21/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 1
Hydrograph for Pond 2P: WET POND
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
0.00
0.00
22,063
2,577.85
1.69
0.40
0.00
19,704
2,577.72
1.58
0.80
0.00
17,511
2,577.59
1.47
1.20
0.00
15,484
2,577.48
1.35
1.60
0.00
13,626
2,577.37
1.23
2.00
0.00
11,940
2,577.27
1.11
2.40
0.00
10,430
2,577.18
0.99
2.80
0.00
9,092
2,577.10
0.87
3.20
0.00
7,947
2,577.02
0.73
3.60
0.00
6,992
2,576.96
0.60
4.00
0.00
6,201
2,576.91
0.50
4.40
0.00
5,544
2,576.87
0.42
4.80
0.00
4,995
2,576.84
0.35
5.20
0.00
4,533
2,576.81
0.30
5.60
0.00
4,141
2,576.78
0.25
6.00
0.00
3,805
2,576.76
0.22
6.40
0.00
3,515
2,576.74
0.19
6.80
0.00
3,262
2,576.72
0.16
7.20
0.00
3,040
2,576.71
0.14
7.60
0.00
2,846
2,576.69
0.13
8.00
0.00
2,672
2,576.68
0.11
8.40
0.00
2,517
2,576.67
0.10
8.80
0.00
2,378
2,576.66
0.09
9.20
0.00
2,253
2,576.65
0.08
9.60
0.00
2,140
2,576.65
0.08
10.00
0.00
2,036
2,576.64
0.07
10.40
0.00
1,941
2,576.63
0.06
10.80
0.00
1,855
2,576.63
0.06
11.20
0.00
1,776
2,576.62
0.05
11.60
0.00
1,704
2,576.62
0.05
12.00
0.00
1,636
2,576.61
0.05
12.40
0.00
1,573
2,576.61
0.04
12.80
0.00
1,514
2,576.60
0.04
13.20
0.00
1,459
2,576.60
0.04
13.60
0.00
1,408
2,576.60
0.03
14.00
0.00
1,359
2,576.59
0.03
14.40
0.00
1,314
2,576.59
0.03
14.80
0.00
1,272
2,576.59
0.03
15.20
0.00
1,233
2,576.59
0.03
15.60
0.00
1,196
2,576.58
0.02
16.00
0.00
1,162
2,576.58
0.02
16.40
0.00
1,130
2,576.58
0.02
16.80
0.00
1,099
2,576.58
0.02
17.20
0.00
1,069
2,576.57
0.02
17.60
0.00
1,040
2,576.57
0.02
18.00
0.00
1,013
2,576.57
0.02
18.40
0.00
987
2,576.57
0.02
18.80
0.00
962
2,576.57
0.02
19.20
0.00
938
2,576.56
0.02
19.60
0.00
915
2,576.56
0.02
20.00
0.00
892
2,576.56
0.02

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/21/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 2
Hydrograph for Pond 2P: WET POND (continued)
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
20.40
0.00
871
2,576.56
0.01
20.80
0.00
851
2,576.56
0.01
21.20
0.00
831
2,576.56
0.01
21.60
0.00
813
2,576.56
0.01
22.00
0.00
795
2,576.55
0.01
22.40
0.00
777
2,576.55
0.01
22.80
0.00
761
2,576.55
0.01
23.20
0.00
745
2,576.55
0.01
23.60
0.00
730
2,576.55
0.01
24.00
0.00
715
2,576.55
0.01
24.40
0.00
701
2,576.55
0.01
24.80
0.00
688
2,576.55
0.01
25.20
0.00
675
2,576.55
0.01
25.60
0.00
663
2,576.55
0.01
26.00
0.00
651
2,576.55
0.01
26.40
0.00
640
2,576.54
0.01
26.80
0.00
629
2,576.54
0.01
27.20
0.00
619
2,576.54
0.01
27.60
0.00
609
2,576.54
0.01
28.00
0.00
599
2,576.54
0.01
28.40
0.00
590
2,576.54
0.01
28.80
0.00
581
2,576.54
0.01
29.20
0.00
573
2,576.54
0.01
29.60
0.00
565
2,576.54
0.01
30.00
0.00
557
2,576.54
0.01
30.40
0.00
549
2,576.54
0.01
30.80
0.00
541
2,576.54
0.01
31.20
0.00
533
2,576.54
0.01
31.60
0.00
525
2,576.54
0.01
32.00
0.00
518
2,576.54
0.01
32.40
0.00
510
2,576.54
0.01
32.80
0.00
503
2,576.53
0.01
33.20
0.00
495
2,576.53
0.01
33.60
0.00
488
2,576.53
0.00
34.00
0.00
481
2,576.53
0.00
34.40
0.00
474
2,576.53
0.00
34.80
0.00
468
2,576.53
0.00
35.20
0.00
461
2,576.53
0.00
35.60
0.00
454
2,576.53
0.00
36.00
0.00
448
2,576.53
0.00
36.40
0.00
441
2,576.53
0.00
36.80
0.00
435
2,576.53
0.00
37.20
0.00
428
2,576.53
0.00
37.60
0.00
422
2,576.53
0.00
38.00
0.00
416
2,576.53
0.00
38.40
0.00
410
2,576.53
0.00
38.80
0.00
404
2,576.53
0.00
39.20
0.00
398
2,576.53
0.00
39.60
0.00
393
2,576.53
0.00
40.00
0.00
387
2,576.53
0.00
40.40
0.00
381
2,576.53
0.00

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/21/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 3
Hydrograph for Pond 2P: WET POND (continued)
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
40.80
0.00
376
2,576.53
0.00
41.20
0.00
371
2,576.53
0.00
41.60
0.00
365
2,576.53
0.00
42.00
0.00
360
2,576.52
0.00
42.40
0.00
355
2,576.52
0.00
42.80
0.00
350
2,576.52
0.00
43.20
0.00
345
2,576.52
0.00
43.60
0.00
340
2,576.52
0.00
44.00
0.00
335
2,576.52
0.00
44.40
0.00
330
2,576.52
0.00
44.80
0.00
325
2,576.52
0.00
45.20
0.00
320
2,576.52
0.00
45.60
0.00
316
2,576.52
0.00
46.00
0.00
311
2,576.52
0.00
46.40
0.00
307
2,576.52
0.00
46.80
0.00
302
2,576.52
0.00
47.20
0.00
298
2,576.52
0.00
47.60
0.00
294
2,576.52
0.00
48.00
0.00
289
2,576.52
0.00
48.40
0.00
285
2,576.52
0.00
48.80
0.00
281
2,576.52
0.00
49.20
0.00
277
2,576.52
0.00
49.60
0.00
273
2,576.52
0.00
50.00
0.00
269
2,576.52
0.00
50.40
0.00
265
2,576.52
0.00
50.80
0.00
261
2,576.52
0.00
51.20
0.00
258
2,576.52
0.00
51.60
0.00
254
2,576.52
0.00
52.00
0.00
250
2,576.52
0.00
52.40
0.00
247
2,576.52
0.00
52.80
0.00
243
2,576.52
0.00
53.20
0.00
240
2,576.52
0.00
53.60
0.00
236
2,576.52
0.00
54.00
0.00
233
2,576.52
0.00
54.40
0.00
229
2,576.52
0.00
54.80
0.00
226
2,576.52
0.00
55.20
0.00
223
2,576.52
0.00
55.60
0.00
220
2,576.52
0.00
56.00
0.00
216
2,576.52
0.00
56.40
0.00
213
2,576.51
0.00
56.80
0.00
210
2,576.51
0.00
57.20
0.00
207
2,576.51
0.00
57.60
0.00
204
2,576.51
0.00
58.00
0.00
201
2,576.51
0.00
58.40
0.00
198
2,576.51
0.00
58.80
0.00
195
2,576.51
0.00
59.20
0.00
193
2,576.51
0.00
59.60
0.00
190
2,576.51
0.00
60.00
0.00
187
2,576.51
0.00
60.40
0.00
184
2,576.51
0.00
60.80
0.00
182
2,576.51
0.00

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/21/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 4
Hydrograph for Pond 2P: WET POND (continued)
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
61.20
0.00
179
2,576.51
0.00
61.60
0.00
177
2,576.51
0.00
62.00
0.00
174
2,576.51
0.00
62.40
0.00
171
2,576.51
0.00
62.80
0.00
169
2,576.51
0.00
63.20
0.00
167
2,576.51
0.00
63.60
0.00
164
2,576.51
0.00
64.00
0.00
162
2,576.51
0.00
64.40
0.00
159
2,576.51
0.00
64.80
0.00
157
2,576.51
0.00
65.20
0.00
155
2,576.51
0.00
65.60
0.00
153
2,576.51
0.00
66.00
0.00
150
2,576.51
0.00
66.40
0.00
148
2,576.51
0.00
66.80
0.00
146
2,576.51
0.00
67.20
0.00
144
2,576.51
0.00
67.60
0.00
142
2,576.51
0.00
68.00
0.00
140
2,576.51
0.00
68.40
0.00
138
2,576.51
0.00
68.80
0.00
136
2,576.51
0.00
69.20
0.00
134
2,576.51
0.00
69.60
0.00
132
2,576.51
0.00
70.00
0.00
130
2,576.51
0.00
70.40
0.00
128
2,576.51
0.00
70.80
0.00
126
2,576.51
0.00
71.20
0.00
125
2,576.51
0.00
71.60
0.00
123
2,576.51
0.00
72.00
0.00
121
2,576.51
0.00
72.40
0.00
119
2,576.51
0.00
72.80
0.00
118
2,576.51
0.00
73.20
0.00
116
2,576.51
0.00
73.60
0.00
114
2,576.51
0.00
74.00
0.00
113
2,576.51
0.00
74.40
0.00
111
2,576.51
0.00
74.80
0.00
109
2,576.51
0.00
75.20
0.00
108
2,576.51
0.00
75.60
0.00
106
2,576.51
0.00
76.00
0.00
105
2,576.51
0.00
76.40
0.00
103
2,576.51
0.00
76.80
0.00
102
2,576.51
0.00
77.20
0.00
100
2,576.51
0.00
77.60
0.00
99
2,576.51
0.00
78.00
0.00
97
2,576.51
0.00
78.40
0.00
96
2,576.51
0.00
78.80
0.00
94
2,576.51
0.00
79.20
0.00
93
2,576.51
0.00
79.60
0.00
92
2,576.51
0.00
80.00
0.00
90
2,576.51
0.00
80.40
0.00
89
2,576.51
0.00
80.80
0.00
88
2,576.51
0.00
81.20
0.00
87
2,576.51
0.00

Patton Cove Subdivision
12164 STORMWATER ANALYSIS Type 11 24-hr 1-Year Rainfall=2.34"
Prepared by Civil Design Concepts Printed 9/21/2022
HydroCAD® 10.20-2f s/n 04679 © 2022 HydroCAD Software Solutions LLC Page 5
Hydrograph for Pond 2P: WET POND (continued)
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
81.60
0.00
85
2,576.51
0.00
82.00
0.00
84
2,576.51
0.00
82.40
0.00
83
2,576.51
0.00
82.80
0.00
82
2,576.51
0.00
83.20
0.00
81
2,576.51
0.00
83.60
0.00
79
2,576.51
0.00
84.00
0.00
78
2,576.51
0.00
84.40
0.00
77
2,576.51
0.00
84.80
0.00
76
2,576.51
0.00
85.20
0.00
75
2,576.51
0.00
85.60
0.00
74
2,576.51
0.00
86.00
0.00
73
2,576.51
0.00
86.40
0.00
72
2,576.50
0.00
86.80
0.00
71
2,576.50
0.00
87.20
0.00
70
2,576.50
0.00
87.60
0.00
69
2,576.50
0.00
88.00
0.00
68
2,576.50
0.00
88.40
0.00
67
2,576.50
0.00
88.80
0.00
66
2,576.50
0.00
89.20
0.00
65
2,576.50
0.00
89.60
0.00
64
2,576.50
0.00
90.00
0.00
63
2,576.50
0.00
90.40
0.00
62
2,576.50
0.00
90.80
0.00
61
2,576.50
0.00
91.20
0.00
60
2,576.50
0.00
91.60
0.00
59
2,576.50
0.00
92.00
0.00
58
2,576.50
0.00
92.40
0.00
58
2,576.50
0.00
92.80
0.00
57
2,576.50
0.00
93.20
0.00
56
2,576.50
0.00
93.60
0.00
55
2,576.50
0.00
94.00
0.00
54
2,576.50
0.00
94.40
0.00
54
2,576.50
0.00
94.80
0.00
53
2,576.50
0.00
95.20
0.00
52
2,576.50
0.00
95.60
0.00
51
2,576.50
0.00
96.00
0.00
51
2,576.50
0.00
96.40
0.00
50
2,576.50
0.00
96.80
0.00
49
2,576.50
0.00
97.20
0.00
48
2,576.50
0.00
97.60
0.00
48
2,576.50
0.00
98.00
0.00
47
2,576.50
0.00
98.40
0.00
46
2,576.50
0.00
98.80
0.00
46
2,576.50
0.00
99.20
0.00
45
2,576.50
0.00
99.60
0.00
44
2,576.50
0.00
100.00
0.00
44
2,576.50
0.00
100.40
0.00
43
2,576.50
0.00
100.80
0.00
42
2,576.50
0.00
101.20
0.00
42
2,576.50
0.00
101.60
0.00
41
2,576.50
0.00

APPENDIX L
Storm Drainage Calculations

STORM DRAIN CALCULATIONS
(25 YEAR EVENT)
Patton Cove
CDC ProjectNo.: 12164
Pipe ID
Upstream
Grate
Elevation
Length (FT)
Inv. In
Inv. Out
Diameter (IN)
Drainage Area
(AC)
Weighted
Runoff. Coef.
(C)
Rainfall
Intensity @
TC (IN/HR)
Incremental Q25
(CFS)
Total Q25 (CFS)
Pipe
Material
Roughness
Coef. (n)
Pipe Slope
Headwater
Available (FT)
HDS-S Inlet
Ref. No.
Inlet
Constant (c)
Inlet
Constant (y)
Manning's
Capacity
(CFS)
Inlet Control
Capacity (CFS)
Pipe Size
Adequacy
Comment
Full Flow
Velocity
Al - AO
2581.47
32.65
2576.7
2576.5
30.00
0.31
0.80
7.46
1.85
27.03
HDPE
0.012
0.52%
4.80
1
0.0398
0.67
32.06
43.5
OK
6.5
A2 - Al
2587.33
174.75
2579.1
2576.8
30.00
0.12
0.80
7.46
0.72
25.18
HDPE
0.012
1.30%
8.28
1
0.0398
0.67
50.64
63.3
OK
10.3
A3 - A2
2588.46
113.8
2580.7
2579.2
30.00
0.23
0.80
7.46
1.37
24.46
HDPE
0.012
1.34%
7.75
1
0.0398
0.67
51.35
60.7
OK
10.5
A4 - A3
2590.8
168.84
2583.9
2581.2
24.00
0.32
0.80
7.46
1.91
15.22
HDPE
0.012
1.58%
6.92
1
0.0398
0.67
30.82
37.3
OK
9.8
A5-A4
2590.84
54.7
2584.8
2584
24.00
0.12
0.80
7.46
0.72
13.31
HDPE
0.012
1.43%
6.03
1
0.0398
0.67
29.27
34.2
OK
9.3
A6-A5
2592.9
54.271
2585.6
2584.9
24.00
0.13
0.70
7.46
0.68
12.59
HDPE
0.012
1.35%
7.26
1
0.0398
0.67
28.42
38.4
OK
9.0
A7-A6
2593.7
76.99
2586.6
2585.71
24.00
7.46
0.00
11.91
HDPE
0.012
1.08%
7.15
1
0.0398
0.67
25.45
1 38.0
OK
8.1
A8-A7
2592.53
57.83
2587.2
2586.7
24.00
0.10
0.65
7.46
0.48
11.91
HDPE
0.012
0.99%
5.31
1
0.0398
0.67
24.33
31.4
OK
7.7
A8.1-A8
2592.52
22.81
2588.5
2588
15.00
0.02
0.95
7.46
0.14
2.11
HDPE
0.012
2.28%
4.03
1
0.0398
0.67
10.57
11.0
OK
8.6
A8.2-A8.1
2592.68
27.88
2589.2
2588.5
15.00
0.31
0.85
7.46
1.97
1.97
HDPE
0.012
2.22%
3.52
1
0.0398
0.67
10.44
10.1
OK
8.5
A9-A8
2595.06
105.63
2590.8
2587.7
18.00
0.28
0.75
7.46
1.57
9.32
HDPE
0.012
2.87%
4.31
1
0.0398
0.67
19.27
16.2
OK
10.9
A9X-A9
2598.18
79.771
2592.6
2591
15.00
0.23
0.70
7.46
1.20
1.20
HDPE
0.012
2.03%
5.56
1
0.0398
0.67
9.97
13.4
OK
8.1
A10-A9
2597.72
89.53
2593.8
2590.91
18.00
0.02
0.95
7.46
0.14
6.55
HDPE
0.012
3.25%
3.96
1
0.0398
0.67
20.52
15.3
OK
11.6
A10X-A10
2597.8
17.34
2594.4
2594
15.00
0.25
0.95
7.46
1.77
1.77
HDPE
0.012
2.36%
3.38
1
0.0398
0.67
10.76
9.8
OK
8.8
All-A10
2598.53
38.29
2595.3
2594.1
15.00
0.23
0.95
7.46
1.63
4.64
HDPE
0.012
3.19%
3.24
1
0.0398
0.67
12.49
9.6
OK
10.2
Al2-All
2599.08
110.48
2596.1
2595.4
15.00
0.13
0.95
7.46
0.92
3.01
HDPE
0.012
0.67%
2.97
1
0.0398
0.67
5.73
9.0
OK
4.7
A13-Al2
2600.9
53.68
2597.6
2596.2
15.00
0.35
0.80
7.46
2.09
2.09
HDPE
0.012
2.61 %
3.33
1
0.0398
0.67
11.30
9.7
OK
9.2
B1 - A3
2589.15
112.4
2582.8
2581.71
18.00
0.22
0.80
7.46
1.31
7.87
HDPE
0.012
0.96%
6.36
1
0.0398
0.67
11.15
20.5
OK
6.3
B1X-B1
2589.2
16.67
2586
2585.6
18.00
0.49
0.70
7.46
2.56
2.56
HDPE
0.012
2.34%
3.17
1
0.0398
0.67
17.41
13.1
OK
9.8
B2-B1
2587.54
129.17
2584.4
2583
15.00
0.33
0.80
7.46
1.97
5.31
HDPE
0.012
1.08%
3.10
1
0.0398
0.67
7.29
9.3
OK
5.9
B3-B2
2587.56
16.95
2584.7
2584.5
15.00
0.64
0.70
7.46
3.34
3.34
HDPE
0.012
0.88%
2.90
1
0.0398
0.67
6.58
8.8
OK
5.4
K2- K1
2575.09
60.971
2573
2571
18.00
1.47
0.60
7.46
6.58
6.58
HDPE
0.012
3.15%
2.13
1
0.0398
1 0.67
20.19
9.5
OK
11.4
C1 - CO
2581.75
20.23
2576.6
2576.5
30.00
17.46
0.00
21.30
HDPE
0.012
0.69%
5.11
1
0.0398
0.67
36.97
45.7
OK
7.5
C2 - C1
2582.6
21.91
2577.3
2577.1
24.00
0.30
0.80
7.46
1.79
13.91
HDPE
0.012
0.78%
5.29
1
0.0398
0.67
21.59
31.3
OK
6.9
C3-C2
2585.53
129.29
2578.5
2577.5
24.00
0.32
0.80
7.46
1.91
12.12
HDPE
0.012
0.84%
6.99
1
0.0398
0.67
22.50
37.5
OK
7.2
C4-C3
2585.74
15.18
2579.5
2579.3
15.00
0.87
0.75
7.46
4.87
4.87
HDPE
0.012
1.05%
6.29
1
0.0398
0.67
7.18
14.4
OK
5.9
D1 - C3
2596.61
163.49
2592.2
2579
18.00
0.18
0.80
7.46
1.07
3.26
HDPE
0.012
8.04%
4.43
1
0.0398
0.67
32.26
16.5
OK
18.3
D2 - D1
2596.96
16.95
2593.5
2592.4
15.00
0.39
0.75
7.46
2.18
2.18
HDPE
0.012
6.25%
3.47
1
0.0398
0.67
17.50
10.1
OK
14.3
E1 - C3
2589.2
118.09
2585.5
2579.3
15.00
0.13
0.70
7.46
0.68
2.09
HDPE
0.012
5.26%
3.70
1
0.0398
0.67
16.05
10.5
OK
13.1
E2 - E1
2590.14
26.02
2586.5
2585.6
15.00
0.27
0.70
7.46
1.41
1.41
HDPE
0.012
3.65%
3.63
1
0.0398
0.67
13.37
10.3
OK
10.9
F1-H1
2579.76
38.89
2571.5
2571.1
30.00
7.46
0.00
15.46
HDPE
0.012
1.03%
8.26
1
0.0398
0.67
45.06
63.2
OK
9.2
G1-C1
2586.08
191.1
2578.7
2577.1
24.00
0.31
0.60
7.46
1.39
7.39
HDPE
0.012
0.80%
7.41
1
0.0398
0.67
21.93
38.8
OK
7.0
G2-G1
2586.81
120.31
2579.6
2578.8
24.00
0.13
0.75
7.46
0.73
6.00
HDPE
0.012
0.64%
7.25
1
0.0398
0.67
19.61
38.3
OK
6.2
G2.1-G2
2586.82
17.47
2582.8
2582.5
15.00
0.03
0.95
7.46
0.21
5.27
HDPE
0.012
2.00%
4.02
1
0.0398
0.67
9.91
11.0
OK
8.1
G2.2-G2.1
2584.86
3.751
2583
2582.91
15.00
0.24
0.55
7.46
0.98
5.06
HDPE
0.012
2.93%
1.86
1
0.0398
0.67
11.99
6.3
OK
9.8
G3-G2
2591.25
113.67
2580.9
2580.1
18.00
0.05
0.70
7.46
0.26
4.07
HDPE
0.012
0.75%
10.34
1
0.0398
0.67
9.84
27.1
OK
5.6
G3X-G3
2592.4
25.65
2588
2585.4
15.00
0.14
0.70
7.46
0.73
3.81
HDPE
0.012
9.98%
4.40
1
0.0398
0.67
22.11
11.7
OK
18.0
G4-G3
2585.17
161.12
2582.1
2581.2
15.00
0.14
0.70
7.46
0.73
3.08
HDPE
0.012
0.59%
3.06
1
0.0398
0.67
5.37
9.2
OK
4.4
G5-G4
2585.24
17.5
2582.3
2582.2
15.00
0.42
0.75
7.46
2.35
2.35
HDPE
0.012
0.57%
2.97
1
0.0398
0.67
5.29
9.0
OK
4.3
H1-HO
2580.58
26.351
2571
2570.81
36.00
7.46
0.00
34.52
HDPE
0.012
0.76%
9.58
1
0.0398
0.67
62.95
97.6
OK
8.9
H2-H1
2593.32
202.03
2575.8
2572.1
24.00
7.46
0.00
19.06
HDPE
0.012
1.81%
17.57
1
0.0398
0.67
32.94
63.5
OK
10.5
H3-H2
2586
194.15
2577.7
2575.9
24.00
7.46
0.00
19.06
HDPE
0.012
0.96%
8.28
1
0.0398
0.67
24.05
41.5
OK
7.7
H4-H3
2587.19
122.67
2582.3
2577.8
24.00
5.11
0.50
7.46
19.06
19.06
HDPE
0.012
3.63%
4.92
1
0.0398
0.67
46.68
29.9
OK
14.9
J2-J1
2594.78
25.8
2594.1
2593.8
15.00
0.31
0.50
7.46
1.16
1.16
HDPE
0.012
1.05%
0.69
1
0.0398
0.67
7.16
#NUM!
#NUM!
5.8
Issued 9/22/2022