20240538 Ver 1_More Info Received_20240717 (2)

FYZ
Civil Calculations
Sweetwater Tap Relocation — Culvert Design
Duke Energy
Hickory, North Carolina
July 12, 2024

Duke Energy I Sweetwater Tap Relocation — Culvert Design Calculations ���
Contents
Contents
Contents .....
1.0 Project Description.......................................................................................................... 1
2.0 Stormwater Calculations.................................................................................................. 1
2.1 Stormwater Peak Flow and Basin Calculations............................................................ 1
2.2 Stormwater Conveyance.............................................................................................. 1
3.0 Erosion & Sediment Control Calculations........................................................................ 2
Appendices
Appendix A — NRCS Soil Survey
Appendix B — NOAA Rainfall Data
Appendix C — Drainage Area Maps
Appendix D — Stormwater Peak Flow Calculations
Appendix E — Culvert Calculations
Appendix F — Riprap Calculations

Duke Energy I Sweetwater Tap Relocation — Culvert Design Calculations ���
Project Description
1.0 Project Description
Duke Energy has plans for a gravel access road to facilitate the construction of their Sweetwater
Tap Relocation Project in Hickory, North Carolina. In order to construct the gravel access road,
a culvert must be installed where the road crosses a tributary to Clark Creek. The tributary is an
intermittent stream and the crossing is not located within the FEMA floodplain.
2.0 Stormwater Calculations
The stormwater calculations were performed to evaluate the drainage area to the point of
interest where the proposed road crosses the tributary to Clark Creek. The drainage area was
based on topography form both Lidar survey data and GIS topography.
2.1 Stormwater Peak Flow and Basin Calculations
One Point of Interest (POI) was determined for discharge from the site. This POI is located
where the proposed road crosses the tributary to Clark Creek.
A hydrologic analysis was completed using the NRCS hydrologic method (details for this
methodology can be found in the NRCS National Engineering Handbook, Section 4). Drainage
area can be seen on the drainage area map in Appendix C
Composite curve numbers were calculated for the drainage area utilizing the land cover and the
hydrologic soil groups for the site found in the NRCS Soil Survey. The site consists of soils in
hydrologic soil groups "A" and "B". The Soil Resource Report for the site can be found in
Appendix A.
The time of concentration for the existing site drainage area was calculated using TR-55. For
the proposed site drainage area, the time of concentration is equal to the time of concentration
through the storm conveyance system. The procedure for determining the CN and time of
concentration can be found in the NRCS, TR-55, Second Edition, June 1986.
A hydrologic routing model was completed using the Bentley HydroCAD software program. The
calculated drainage area size, composite curve number and time of concentration for each
drainage area were entered into the software. The total rainfall depths for the 10-year, 24-hour
design storm event was obtained from the National Oceanic and Atmospheric Administration's
website. NOAA rainfall data can be found in Appendix B. The total rainfall depth was entered
into the model and run utilizing the NRCS Type 11 rainfall distribution with a one minute time
interval. Peak flow for the 10-year design storm was determined to be 93.46 cubic feet per
second.
The full stormwater peak flow calculations can be found in Appendix D of this report.
2.2 Stormwater Conveyance
The culvert capacity calculation was completed using the HY-8 software. HY-8 utilizes the
Manning's equation to determine the pipe capacity based on gravity flow and is capable of
modeling a culvert embedded in a stream. The pipe design criteria (i.e. pipe length, slope,

Duke Energy I Sweetwater Tap Relocation — Culvert Design Calculations ���
Riprap Calculations
material/manning's n/embedment) was input into the software based on the design plans. Then
a pipe size was selected that would meet the capacity requirement for a 10-yr, 24-hour storm.
HY-8 calculations can be seen in Appendix E.
3.0 Riprap Calculations
While the goal of the design is to maintain the existing stream hydraulics to the greatest extent
possible, the concentration of the site drainage into a culvert for the road crossing will result in a
flow exiting the culvert that requires energy dissipation in order to maintain streambed stability.
For this design, separate calculations were used to calculate the riprap size and the dimensions
of the required riprap. These calculations can be found in Appendix F of this report.
Riprap outlet protection for the storm system and BMP outlet culvert were also sized using the
results from the storm water conveyance calculations for the 10-year, 24-hour storm event. The
appropriate riprap stone size was determined by the using Figure 8.06a from the NCDEQ
Erosion and Sediment Control Planning and Design Manual. This figure utilizes the peak
discharge to determine the midpoint stone size (D50). For sizing the dimensions of the riprap
apron, a spreadsheet was used that accounts for riprap design in a trapezoidal waterway. The
outlet protection calculation can be found in Appendix F.

Eastern Band of Cherokee Indians I Cherokee Trout Hatc Civil Calculations ���
Appendices
Appendix A — NRCS Soil
Survey

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
Catawba County,
North Carolina
November 21, 2023

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://offices.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
2

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.
3

Contents
Preface.................................................................................................................... 2
How Soil Surveys Are Made..................................................................................5
SoilMap..................................................................................................................
8
SoilMap................................................................................................................9
Legend................................................................................................................10
MapUnit Legend................................................................................................
11
MapUnit Descriptions.........................................................................................11
Catawba County, North Carolina....................................................................
14
CfB—Clifford sandy loam, 2 to 6 percent slopes.........................................14
CfC—Clifford sandy loam, 6 to 10 percent slopes ......................................
15
CgB2—Clifford sandy clay loam, 2 to 6 percent slopes, moderately
eroded...................................................................................................16
CgC2—Clifford sandy clay loam, 6 to 10 percent slopes, moderately
eroded...................................................................................................18
CsA—Codorus loam, 0 to 2 percent slopes, frequently flooded..................19
FaE3—Fairview clay loam, 10 to 25 percent slopes, severely eroded ........
21
FcC—Fairview gravelly fine sandy loam, 6 to 10 percent slopes................22
FdE2—Fairview soils, 10 to 25 percent slopes, moderately eroded...........
23
TmC—Tomlin loam, 6 to 10 percent slopes ................................................
24
References............................................................................................................
26
4

How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous
areas in a specific area. They include a description of the soils and miscellaneous
areas and their location on the landscape and tables that show soil properties and
limitations affecting various uses. Soil scientists observed the steepness, length,
and shape of the slopes; the general pattern of drainage; the kinds of crops and
native plants; and the kinds of bedrock. They observed and described many soil
profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The
profile extends from the surface down into the unconsolidated material in which the
soil formed or from the surface down to bedrock. The unconsolidated material is
devoid of roots and other living organisms and has not been changed by other
biological activity.
Currently, soils are mapped according to the boundaries of major land resource
areas (MLRAs). MLRAs are geographically associated land resource units that
share common characteristics related to physiography, geology, climate, water
resources, soils, biological resources, and land uses (USDA, 2006). Soil survey
areas typically consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that
is related to the geology, landforms, relief, climate, and natural vegetation of the
area. Each kind of soil and miscellaneous area is associated with a particular kind
of landform or with a segment of the landform. By observing the soils and
miscellaneous areas in the survey area and relating their position to specific
segments of the landform, a soil scientist develops a concept, or model, of how they
were formed. Thus, during mapping, this model enables the soil scientist to predict
with a considerable degree of accuracy the kind of soil or miscellaneous area at a
specific location on the landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented
by an understanding of the soil -vegetation -landscape relationship, are sufficient to
verify predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them
to identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character
of soil properties and the arrangement of horizons within the profile. After the soil
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Custom Soil Resource Report
scientists classified and named the soils in the survey area, they compared the
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that
have similar use and management requirements. Each map unit is defined by a
unique combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components
of the map unit. The presence of minor components in a map unit in no way
diminishes the usefulness or accuracy of the data. The delineation of such
landforms and landform segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, onsite
investigation is needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape,
and experience of the soil scientist. Observations are made to test and refine the
soil -landscape model and predictions and to verify the classification of the soils at
specific locations. Once the soil -landscape model is refined, a significantly smaller
number of measurements of individual soil properties are made and recorded.
These measurements may include field measurements, such as those for color,
depth to bedrock, and texture, and laboratory measurements, such as those for
content of sand, silt, clay, salt, and other components. Properties of each soil
typically vary from one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists
interpret the data from these analyses and tests as well as the field -observed
characteristics and the soil properties to determine the expected behavior of the
soils under different uses. Interpretations for all of the soils are field tested through
observation of the soils in different uses and under different levels of management.
Some interpretations are modified to fit local conditions, and some new
interpretations are developed to meet local needs. Data are assembled from other
sources, such as research information, production records, and field experience of
specialists. For example, data on crop yields under defined levels of management
are assembled from farm records and from field or plot experiments on the same
kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on
such variables as climate and biological activity. Soil conditions are predictable over
long periods of time, but they are not predictable from year to year. For example,
soil scientists can predict with a fairly high degree of accuracy that a given soil will
have a high water table within certain depths in most years, but they cannot predict
that a high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
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Custom Soil Resource Report
identified each as a specific map unit. Aerial photographs show trees, buildings,
fields, roads, and rivers, all of which help in locating boundaries accurately.
7

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.
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Custom Soil Resource Report
Soil Map
o
471000 471100 471200 471300 4714W 471500 471600 471700 4718M 4719M 472000 472100 472200 472300 472400 472500
35' 43' 32" N f _. 35' 43' 32" N
8 �^ 4. •. 8
If
ell
3 KILN
/ f
j
_
35° 42' S9" N 35° 47 59" N
471000 471100 471200 471300 471400 471500 471600 471700 471800 471900 472000 472100 472200 472300 472400 472500
3 3
a -
Map Scale: 1:7,180 i printed on A landscape (11" x 8.5") sheet.
Meteso
o
N 0 100 200 400 600
reef
0 300 600 1200 1800
Map projection: Web Mercator Comer coordinates: WGS84 Edge tics: UTM Zone 17N WGS84
9

MAP LEGEND
Area of Interest (AOI)
Area of Interest (AOI)
Soils
0 Soil Map Unit Polygons
im 0 Soil Map Unit Lines
■ Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
.4 Gravelly Spot
0 Landfill
Lava Flow
Marsh or swamp
+ Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
d Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Custom Soil Resource Report
MAP INFORMATION
A
Spoil Area
The soil surveys that comprise your AOI were mapped at
1:15,800.
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
�}}
Rails
measurements.
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: Catawba County, North Carolina
Survey Area Data: Version 24, Sep 13, 2023
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Apr 22, 2022—May
10, 2022
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.
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Custom Soil Resource Report
Map Unit Legend
Map Unit Symbol
Map Unit Name
Acres in AOI
Percent of AOI
CfB
Clifford sandy loam, 2 to 6
49.6
27.5%
percent slopes
Clifford sandy loam, 6 to 10
CfC
10.9
6.1%
percent slopes
CgB2
Clifford sandy clay loam, 2 to 6
0.7
0.4%
percent slopes, moderately
eroded
CgC2
Clifford sandy clay loam, 6 to 10
5.6
3.1 %
percent slopes, moderately
eroded
CsA
Codorus loam, 0 to 2 percent
12.8
7.1 %
slopes, frequently flooded
FaE3
Fairview clay loam, 10 to 25
5.0
2.7%
percent slopes, severely
eroded
FcC
Fairview gravelly fine sandy
43.2
24.0%
loam, 6 to 10 percent slopes
FdE2
Fairview soils, 10 to 25 percent
47.8
26.5%
slopes, moderately eroded
TmC
Tomlin loam, 6 to 10 percent
4.7
2.6%
slopes
Totals for Area of Interest
180.2
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
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Custom Soil Resource Report
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
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
Iandform 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.
12

Custom Soil Resource Report
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
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Custom Soil Resource Report
Catawba County, North Carolina
U13—Clifford sandy loam, 2 to 6 percent slopes
Map Unit Setting
National map unit symbol: 2mlx4
Elevation: 200 to 2,000 feet
Mean annual precipitation: 37 to 60 inches
Mean annual air temperature: 50 to 59 degrees F
Frost -free period: 160 to 200 days
Farmland classification: All areas are prime farmland
Map Unit Composition
Clifford and similar soils: 90 percent
Minor components: 3 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Clifford
Setting
Landform: Interfluves
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Convex
Parent material: Saprolite derived from granite and gneiss and/or schist
Typical profile
Ap - 0 to 6 inches: sandy loam
BA - 6 to 10 inches: sandy loam
Bt - 10 to 47 inches: clay
BC - 47 to 57 inches: clay loam
CB - 57 to 80 inches: loam
Properties and qualities
Slope: 2 to 6 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: Low
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 8.3 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 2e
Hydrologic Soil Group: A
Ecological site: F136XY320VA - Mesic temperature regime, acidic upland forest,
moist
Hydric soil rating: No
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Custom Soil Resource Report
Minor Components
Westfield
Percent of map unit: 3 percent
Landform: Interfluves
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Convex
Hydric soil rating: No
M—Clifford sandy loam, 6 to 10 percent slopes
Map Unit Setting
National map unit symbol: 2mlx5
Elevation: 200 to 2,000 feet
Mean annual precipitation: 37 to 60 inches
Mean annual air temperature: 50 to 59 degrees F
Frost -free period: 160 to 200 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Clifford and similar soils: 90 percent
Minor components: 4 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Clifford
Setting
Landform: Interfluves
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Convex
Parent material: Saprolite derived from granite and gneiss and/or schist
Typical profile
Ap - 0 to 6 inches: sandy loam
BA - 6 to 10 inches: sandy loam
Bt - 10 to 47 inches: clay
BC - 47 to 57 inches: clay loam
CB - 57 to 80 inches: loam
Properties and qualities
Slope: 6 to 10 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)
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Custom Soil Resource Report
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 8.3 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: A
Ecological site: F136XY320VA - Mesic temperature regime, acidic upland forest,
moist
Hydric soil rating: No
Minor Components
Westfield
Percent of map unit: 3 percent
Landform: Hillslopes on ridges
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down -slope shape: Linear
Across -slope shape: Convex
Hydric soil rating: No
Woolwine
Percent of map unit: 1 percent
Landform: Hillslopes on ridges
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down -slope shape: Linear
Across -slope shape: Convex
Hydric soil rating: No
CgB2—Clifford sandy clay loam, 2 to 6 percent slopes, moderately
eroded
Map Unit Setting
National map unit symbol: 2tgcz
Elevation: 660 to 1,310 feet
Mean annual precipitation: 39 to 51 inches
Mean annual air temperature: 57 to 59 degrees F
Frost -free period: 190 to 230 days
Farmland classification: All areas are prime farmland
Map Unit Composition
Clifford, moderately eroded, and similar soils: 90 percent
Minor components: 10 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
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Custom Soil Resource Report
Description of Clifford, Moderately Eroded
Setting
Landform: Interfluves
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Convex
Parent material: Saprolite residuum weathered from schist and/or saprolite
residuum weathered from gneiss
Typical profile
Ap - 0 to 6 inches: sandy clay loam
Btl - 6 to 37 inches: clay
Bt2 - 37 to 52 inches: clay loam
C - 52 to 80 inches: clay loam
Properties and qualities
Slope: 2 to 6 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: Low
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 7.3 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 2e
Hydrologic Soil Group: B
Ecological site: F136XY320VA - Mesic temperature regime, acidic upland forest,
moist
Hydric soil rating: No
Minor Components
Woolwine, moderately eroded
Percent of map unit: 5 percent
Landform: Interfluves
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Convex
Hydric soil rating: No
Westfield, moderately eroded
Percent of map unit: 5 percent
Landform: Interfluves
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Convex
Hydric soil rating: No
17

Custom Soil Resource Report
CgU—Clifford sandy clay loam, 6 to 10 percent slopes, moderately
eroded
Map Unit Setting
National map unit symbol: 2tgd 1
Elevation: 660 to 1,310 feet
Mean annual precipitation: 39 to 51 inches
Mean annual air temperature: 57 to 59 degrees F
Frost -free period: 190 to 230 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Clifford, moderately eroded, and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Clifford, Moderately Eroded
Setting
Landform: Interfluves
Landform position (two-dimensional): Summit, shoulder
Landform position (three-dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Convex
Parent material: Saprolite residuum weathered from schist and/or saprolite
residuum weathered from gneiss
Typical profile
Ap - 0 to 6 inches: sandy clay loam
Btl - 6 to 37 inches: clay
Bt2 - 37 to 52 inches: clay loam
C - 52 to 80 inches: clay loam
Properties and qualities
Slope: 6 to 10 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 7.3 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: B
18

Custom Soil Resource Report
Ecological site: F136XY320VA - Mesic temperature regime, acidic upland forest,
moist
Hydric soil rating: No
Minor Components
Westfield, moderately eroded
Percent of map unit: 8 percent
Landform: Interfluves
Landform position (two-dimensional): Summit, shoulder
Landform position (three-dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Convex
Hydric soil rating: No
Woolwine, moderately eroded
Percent of map unit: 7 percent
Landform: Interfluves
Landform position (two-dimensional): Summit, shoulder
Landform position (three-dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Convex
Hydric soil rating: No
CsA—Codorus loam, 0 to 2 percent slopes, frequently flooded
Map Unit Setting
National map unit symbol: 2mlxw
Elevation: 200 to 1,560 feet
Mean annual precipitation: 40 to 48 inches
Mean annual air temperature: 50 to 59 degrees F
Frost -free period: 160 to 200 days
Farmland classification: Prime farmland if drained and either protected from flooding
or not frequently flooded during the growing season
Map Unit Composition
Codorus and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Codorus
Setting
Landform: Flood plains
Landform position (three-dimensional): Tread
Down -slope shape: Concave
Across -slope shape: Linear
Parent material: Loamy alluvium derived from igneous and metamorphic rock
Typical profile
A - 0 to 8 inches: loam
19

Custom Soil Resource Report
Bw1 - 8 to 18 inches:
silty clay loam
Bw2 - 18 to 30 inches:
loam
Bw3 - 30 to 38 inches:
silt loam
BCg - 38 to 50 inches:
silt loam
Cg - 50 to 80 inches: silt loam
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Somewhat poorly drained
Runoff class: Low
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: About 6 to 24 inches
Frequency of flooding: Frequent
Frequency of ponding: None
Available water supply, 0 to 60 inches: High (about 10.7 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4w
Hydrologic Soil Group: B/D
Ecological site: F136XY11 OVA - Mesic temperature regime, flood plain forest, wet
Hydric soil rating: No
Minor Components
Hatboro, undrained
Percent of map unit: 5 percent
Landform: Depressions on flood plains
Landform position (three-dimensional): Tread
Down -slope shape: Concave
Across -slope shape: Linear
Hydric soil rating: Yes
Pfafftown
Percent of map unit: 2 percent
Landform: Stream terraces
Landform position (three-dimensional): Tread
Down -slope shape: Convex
Across -slope shape: Linear
Hydric soil rating: No
Ronda
Percent of map unit: 2 percent
Landform: Natural levees on flood plains
Landform position (three-dimensional): Tread
Down -slope shape: Convex
Across -slope shape: Convex
Hydric soil rating: No
Banister
Percent of map unit: 2 percent
Landform: Flats on stream terraces
Landform position (three-dimensional): Tread
Down -slope shape: Concave
Across -slope shape: Linear
20

Custom Soil Resource Report
Hydric soil rating: No
Comus
Percent of map unit: 2 percent
Landform: Flood plains
Landform position (three-dimensional): Tread
Down -slope shape: Convex
Across -slope shape: Linear
Hydric soil rating: No
Dan river
Percent of map unit: 2 percent
Landform: Flood plains
Landform position (three-dimensional): Tread
Down -slope shape: Convex
Across -slope shape: Linear
Hydric soil rating: No
FaE3—Fairview clay loam, 10 to 25 percent slopes, severely eroded
Map Unit Setting
National map unit symbol: 2mlxr
Elevation: 200 to 1,400 feet
Mean annual precipitation: 37 to 60 inches
Mean annual air temperature: 50 to 59 degrees F
Frost -free period: 160 to 190 days
Farmland classification: Not prime farmland
Map Unit Composition
Fairview, severely eroded, and similar soils: 85 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Fairview, Severely Eroded
Setting
Landform: Hillslopes on ridges
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down -slope shape: Linear
Across -slope shape: Convex
Parent material: Saprolite derived from granite and gneiss and/or schist
Typical profile
A - 0 to 3 inches: clay loam
Bt - 3 to 29 inches: clay
BC - 29 to 37 inches: clay loam
C1 - 37 to 52 inches: clay loam
C2 - 52 to 80 inches: loam
Properties and qualities
Slope: 10 to 25 percent
21

Custom Soil Resource Report
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 7.7 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 6e
Hydrologic Soil Group: B
Ecological site: F136XY320VA - Mesic temperature regime, acidic upland forest,
moist
Hydric soil rating: No
FcC—Fairview gravelly fine sandy loam, 6 to 10 percent slopes
Map Unit Setting
National map unit symbol: 2mm3b
Elevation: 200 to 1,400 feet
Mean annual precipitation: 40 to 48 inches
Mean annual air temperature: 50 to 59 degrees F
Frost -free period: 160 to 190 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Fairview and similar soils: 85 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Fairview
Setting
Landform: Hillslopes on ridges
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down -slope shape: Linear
Across -slope shape: Convex
Parent material: Saprolite derived from granite and gneiss and/or schist
Typical profile
A - 0 to 3 inches: gravelly fine sandy loam
E - 3 to 7 inches: gravelly fine sandy loam
Bt - 7 to 25 inches: sandy clay
C - 25 to 80 inches: sandy clay loam
Properties and qualities
Slope: 6 to 10 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
22

Custom Soil Resource Report
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 7.3 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: B
Ecological site: F136XY320VA - Mesic temperature regime, acidic upland forest,
moist
Hydric soil rating: No
FdE2—Fairview soils, 10 to 25 percent slopes, moderately eroded
Map Unit Setting
National map unit symbol: 2mm2s
Elevation: 200 to 3,500 feet
Mean annual precipitation: 40 to 65 inches
Mean annual air temperature: 50 to 59 degrees F
Frost -free period: 160 to 200 days
Farmland classification: Not prime farmland
Map Unit Composition
Fairview, moderately eroded, and similar soils: 75 percent
Minor components: 10 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Fairview, Moderately Eroded
Setting
Landform: Hillslopes on ridges
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down -slope shape: Linear
Across -slope shape: Convex
Parent material: Saprolite derived from schist and/or gneiss
Typical profile
Ap - 0 to 9 inches: sandy clay loam
Bt - 9 to 24 inches: clay
BCt - 24 to 29 inches: sandy clay loam
C - 29 to 80 inches: loam
Properties and qualities
Slope: 10 to 25 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: High
23

Custom Soil Resource Report
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 8.3 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4e
Hydrologic Soil Group: B
Ecological site: F136XY320VA - Mesic temperature regime, acidic upland forest,
moist
Hydric soil rating: No
Minor Components
Meadowfield
Percent of map unit: 5 percent
Landform: Hillslopes on ridges
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down -slope shape: Linear
Across -slope shape: Convex
Hydric soil rating: No
Woolwine, moderately eroded
Percent of map unit: 5 percent
Landform: Hillslopes on ridges
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down -slope shape: Linear
Across -slope shape: Convex
Hydric soil rating: No
TmC—Tomlin loam, 6 to 10 percent slopes
Map Unit Setting
National map unit symbol: 2mm27
Elevation: 200 to 1,400 feet
Mean annual precipitation: 37 to 60 inches
Mean annual air temperature: 50 to 59 degrees F
Frost -free period: 160 to 190 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Tomlin and similar soils: 90 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
24

Custom Soil Resource Report
Description of Tomlin
Setting
Landform: Hillslopes on ridges
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down -slope shape: Linear
Across -slope shape: Convex
Parent material: Saprolite derived from diorite and/or gabbro and/or diabase
and/or gneiss
Typical profile
Apt - 0 to 4 inches: loam
Ap2 - 4 to 8 inches: clay loam
Bt1 - 8 to 30 inches: clay
Bt2 - 30 to 37 inches: silty clay
Bt3 - 37 to 49 inches: silty clay loam
BCt - 49 to 57 inches: silt loam
C - 57 to 81 inches: loam
Properties and qualities
Slope: 6 to 10 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
Sodium adsorption ratio, maximum: 1.0
Available water supply, 0 to 60 inches: Moderate (about 8.2 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: B
Ecological site: F136XY320VA - Mesic temperature regime, acidic upland forest,
moist
Hydric soil rating: No
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/
nres/detail/national/soils/?cid=nres 142p2_054262
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/rangepasture/?cid=stelprdb1043084
26

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/
nres/detail/soils/scientists/?cid=nres142p2_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=nres142p2_053624
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http://
www.nrcs.usda.gov/lnternet/FSE—DOCUMENTS/nrcsl 42p2_052290.pdf
27

Eastern Band of Cherokee Indians I Cherokee Trout Hatc Civil Calculations ���
Appendices
Appendix B — NOAA Rainfall
Data

NOAA Atlas 14, Volume 2, Version 3
' Location name: Hickory, North Carolina, USA*�'
Latitude: 35.7215°, Longitude:-81.3103°
Elevation: 1063 ft**
source: ESRI Maps
** 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
11 PDS-based point precipitation freciuencv estimates with 90% confidence intervals (in inches/hour)1 11
Average recurrence interval (years)
Duration �����
1 2 5 10 25 50 100 200
5-min 4.43 5.24 6.19 6- 7.82 8.48 9.14 9.79
(4.07-4.82) (4.82-5.71) 1 (5.68-6.76) 1 (6.31-7.54) (7.08-8.53) (7.63-9.28) 1 (8.15-10.0) 1 (8.63-10.8)
10-min 3.53 4.19 4.96 5.53 6.23 6.76 7.27 7.76
(3.25-3.85) 1 (3.86-4.57) 11 (4.54-5.41) 1 (5.05-6.02) (5.65-6.80) (6.07-7.39) 1 (6.47-7.97)
15-min 2.94 3.51 4.18 4.66 5.26 5.70 6.12 6.53
(2.71-3.21) 1 (3.23-3.83) 1 (3.83-4.56) 1 (4.26-5.08) 1 (4.77-5.74) 1 (5.13-6.23) 1 (5.46-6.72) 1 (5.75-7.20)
30-min 2.02 2.43 2.97 3.38 3.90 4.29 4.69 5.08
(1.86-2.20) 1 (2.23-2.65) 1 (2.72-3.24) 1 (3.08-3.68) 1 (3.53-4.26) 1 (3.86-4.69) 1 (4.18-5.15) 1 (4.47-5.61)
60-min 1.26 1.52 1.90 2.20 2.60 2.91 3.23 3.56
(1.16-1.37) 1 (1.40-1.66) 1 (1.74-2.08) 1 (2.01-2.40) 1 (2.35-2.83) 1 (2.62-3.18) 1 (2.88-3.54) (3.14-3.93)
2-hr 0.732 0.889 1.12 1.31 1.56 1.77 1.99 2.22
(0.671-0.798) (0.814-0.971) (1.03-1.23) 1 (1.19-1.43) 1 (1.41-1.71) 1 (1.58-1.94) 1 (1.76-2.19)
3-hr 0.522 0.632 0.800 0.934 1.12 1.28 1.45 1.62
(0.479-0.574) (0.579-0.695) (0.730-0.879) (0.849-1.02) 1 (1.01-1.24) 1 (1.14-1.41) 11 (1.28-1.60) (1.42-1.81)
6-hr 0.324 0.390 0.491 0.572 0.687 0.782 0.882 0.989
(0.298-0.354) (0.359-0.427) (0.450-0.537) (0.522-0.625) (0.622-0.750) (0.702-0.856) (0.783-0.969) (0.868-1.09)
500 1000
10.6
11.3
(9.19-11.8)
(9.60-12
8.39
F 8.86
(7.27-9.34)
(7.55-9.f
7.04 T
7.42
(6.10-7.84)
(6.32-8.
5.60
6.00
(4.85-6.24)
1 (5.12-6.7
4.02
4.38
2.54 11 2.80
(2.18-2.84) 11 (2.36-3.16)
1.88 2.09
(1.60-2.12) 11 (1.76-2.37)
1.14 1.27
(0.982-1.27) (1.07-1.42)
0.198
0.239
0.300
0.348
0.415
0.470
0.527
0.586
0.670
0.738
12-hr
(0.183-0.216)
(0.221-0.261)
(0.276-0.327)
(0.319-0.379)
(0.378-0.452)
(0.424-0.512)
(0.471-0.575)
(0.518-0.642)
(0.583-0.737)
(0.633-0.815)
0.150
0.190
0.221
0.265
0.299
0.335
0.372
0.423
0.463
Ej��E]F-0.-123
(0.115-0.134)
(0.139-0.162)
(0.176-0.206)
(0.204-0.240)
(0.2. 3-0.287)
(0.274-0.324)
(0.305-0.363)
(0.337-0.404)
(0.381-0.460)
(0.415-0.505)
2-day 0.073 11 0.089 11 0.111 11 0.129 0.153 11 0.172 1 0.191 0.211 11 0.238 0.260
(0.068-0.080) (0.082-0.096) (0.103-0.121) (0.119-0.140) (0.141-0.166) (0.157-0.187) (0.175-0.208) (0.192-0.230) (0.215-0.259) (0.233-0.283)
3-day 0.052 0.063 0.078 0.090 0.107 0.120 0.133 0.146 0.165 0.179
(0.048-0.056) (0.058-0.068) (0.072-0.085) (0.083-0.098) (0.098-0.115) (0.110-0.129) (0.121-0.144) (0.133-0.159) (0.149-0.179) (0.161-0.195)
4-day 0.041 0.049 0.062 0.071 0.084 0.093 0.104 0.114 0.128 0.139
(0.038-0.044) (0.046-0.053) (0.057-0.066) (0.065-0.076) (0.077-0.090) (0.086-0.101) (0.095-0.112) (0.104-0.123) (0.116-0.139) (0.126-0.151)
7-day 0.027 0.032 0.039 0.045 0.052 0.058 0.064 0.069 0.077 0.083
(0.025-0.029) (0.030-0.035) (0.037-0.042) (0.042-0.048) (0.048-0.056) (0.054-0.062) (0.059-0.068) (0.064-0.075) (0.071-0.083) (0.076-0.090)
10-day 0.021 0.026 0.031 0.035 0.040 0.044 0.048 0.052 0.058 0.062
(0.020-0.023) (0.024-0.027) (0.029-0.033) (0.033-0.037) (0.037-0.043) (0.041-0.047) (0.045-0.052) (0.048-0.056) (0.053-0.062) (0.057-0.066)
20-day 0.014 0.017 0.020 0.022 0.026 0.028 6.031 0.033 6.036 0.039
(0.013-0.015) (0.016-0.018) (0.019-0.021) (0.021-0.024) (0.024-0.027) (0.026-0.030) (0.029-0.032) (0.031-0.035) (0.034-0.039) (0.036-0.041)
30-day 0.012 0.014 0.016 0.017 T 0.019 0.021 0.022 F 0.024 0.026 0.027
(0.011-0.012) (0.013-0.014) (0.015-0.017) (0.017-0.018) (0.018-0.020) (0.020-0.022) (0.021-0.024) (0.023-0.025) (0.024-0.027) (0.025-0.029)
45-day 0.010 0.011 0.013 0.014 0.016 0.017 0.018 0.019 0.020 0.021
(0.009-0.010) (0.011-0.012) (0.012-0.014) (0.013-0.015) (0.015-0.016) (0.016-0.017) (0.017-0.018) (0.018-0.019) (0.019-0.021) (0.020-0.022)
60-day 0.009 0.010 0.011 0.012 0.013 0.014 0.015 0.016 0.017 0.018
(0.008-0.009) (0.010-0.010) (0.011-0.012) (0.012-0.013) (0.013-0.014) (0.014-0.015) (0.015-0.016) (0.015-0.017) (0.016-0.018) (0.017-0.019)
t Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).
umbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for
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
iecked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.
refer to NOAAAtlas 14 document for more information.
Back to Top
PF graphical

PD5-based intensity -duration -frequency (IDF) curves
Latitude: 35.7215', Longitude_-81.3103'
101
c L- >. :�, >. }, >, 7, 7. >, �
-cp b 4 U b
Lf5 O u'i O O n N N r~ O N rr5 1D
m La Duration'
101
10 -2
NOAAAtlas 14, Volume 2, Versian 3
4 4 i4 4i ii i
Average recurrence interval (years)
Created (GMT}_ Man Noy 27 15:02.09 202 3
Back to Top
Maps & aerials
Small scale terrain
Average recurrence
interval
tyeara}
— 1
2
— s
— 10
25
— so
100
200
•— goo
1000
Duration
— 5-mn
— 2-day
— IO-min
— 3-day
15-rnln
— 4-day
— 30-min
— 7-day
— 60-min
— 10-day
— 2-hr
20-day
— 3-hr
— 30-day
— "ir
— 45-day
— 12-hr
— 5 D-day
24-hr

jw
angvi
ff
II
Hickory
1,
Large scale terrain
FIT- _
Ki 1195port BI Istol
J011115011 6ty" Winston-Salem
4P • Dul
Greensboro
jk
"Ashedille FORTH C A R 0 L I N A
Charlotte
ter
I 00k
4MI T T n N T T WT A
Large scale map
Bri5fo
fem Greensborc
A h -11 k!�w; e2 North
Carolina
in-flOtte on _S t\
North Carolina
Fitte
100km
60mi
Large scale aerial

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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

NOAA Atlas 14, Volume 2, Version 3
' Location name: Hickory, North Carolina, USA ",
Latitude: 35.721*, Longitude:-81.3103°
Elevation: 1085 ft**
source: ESRI Maps
** source: USGS`"
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M. Bonnin, D. Martin, B. Lin, T. Parzybok, M.Yekta, and D. Riley
NOAA, National Weather Service, Silver Spring, Maryland
PF tabular I PF graphical I Maps & aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)'
Average recurrence interval (years)
Duration ����
1 2 5 10 25 50 100 200 500 1000
0.369 0.437 0.516 0.576 0.652 0.707 0.762 0.816 0.884 0.938
5-min
(0.339-0.402) (0.402-0.476) (0.473-0.563) (0.526-0.628) (0.590-0.711) (0.636-0.773) (0.679-0.836) (0.719-0.901) (0.766-0.985) (0.800-1.05)
0.589 0.699 0.826 0.922 1.04 1.13 1.21 1.29 1.40 1.48
10-min
(0.542-0.642) (0.643-0.762) (0.757-0.901) (0.841-1.00) (0.941-1.13) 1 (1.01-1.23) 1 (1.08-1.33) 1 (1.14-1.43) 1 (1.21-1.56) (1.26-1.66)
0.736 0.878 1.04 1.17 1.32 1.42 1.53 1.63 1.76 1.85
15-min
(0.677-0.802) (0.808-0.958) (0.958-1.14) 1 (1.06-1.27) 11 (1.19-1.44) 1 (1.28-1.56) 1 (1.36-1.68) 11 (1.44-1.80) 1 (1.52-1.96) (1.58-2.08)
1.01 1.21 1.48 1.69 1.95 2.15 2.34 2.54 2.80 3.00
30-min
(0.929-1.10) 1 (1.12-1.32) 11 (1.36-1.62) 1 (1.54-1.84) 11 (1.77-2.13) 1 (1.93-2.35) 1 (2.09-2.57) 11 (2.24-2.80) 1 (2.43-3.12) (2.56-3.37)
1.26 1.52 1.90 2.20 2.60 2.91 3.23 3.56 4.02 4.38
60-min
(1.16-1.37) 1 (1.40-1.66) 11 (1.74-2.08) 1 (2.01-2.40) 11 (2.35-2.83) 1 (2.62-3.18) (2.88-3.54) (3.14-3.93) (3.48-4.48) (3.74-4.92)
2-hr 1.46 1.78 2.25 2.62 3.13 3.54 3.98 4.43 5.08 5.60
(1.34-1.60) (1.63-1.94) 11 (2.05-2.46) (2.38-2.86) (2.83-3.42) (3.17-3.88) (3.52-4.38) (3.88-4.91) (4.36-5.67) (4.73-6.31)
1.57 1.90 2.40 2.81 3.38 3.85 4.35 4.88 5.65 6.28
3-hr
(1.44-1.72) (1.74-2.09) 1 (2.20-2.64) (2.55-3.08) (3.04-3.71) (3.44-4.25) (3.84-4.81) 1 (4.26-5.44) (4.82-6.35) (5.28-7.13)
1.94 2.34 2.94 3.43 4.12 4.68 5.28 5.92 6.84 7.59
6-hr
(1.79-2.12) (2.15-2.56) (2.70-3.22) (3.13-3.74) (3.73-4.50) (4.21-5.13) (4.69-5.81) 1 (5.20-6.55) (5.88-7.62) (6.42-8.52)
2.39 2.89 3.62 4.20 5.01 5.67 6.35 7.07 8.08 8.89
12-hr
(2.21-2.60) (2.66-3.15) (3.33-3.94) (3.85-4.57) (4.56-5.45) (5.12-6.17) (5.68(5.68-6.93) 11 (6.25-7.74) (7.04-8.88) (7.64-9.82)
24-hr 2.97 3.60 4.57 5.32 6.36 7.20 8.05 8.94 10.2 11.1 )
(2.76-3.22) (3.34-3.91) (4.22-4.96) (4.91-5.77) (5.85-6.89) (6.59-7.80) (7.34-8.73) (8.10-9.71) (9.14-11.1) (9.97-12.1
2-day 428 5.38 6.22 7.38 8.29 10.2 11.5 12.53.54 .
(3.28-3.84) 1 (3.96-4.65) 11 (4.97-5.83) 1 (5.74-6.74) (6.78-8.00) (7.58-8.99) (8.40-10.0) (9.23-11.1) 1 (10.4-12.5) 1 (11.2-13.6)
3.77 4.54 5.66 6.54 7.72 8.66 9.60 10.6 11.9 12.9
3-day
(3.49-4.07) (4.21-4.91) (5.24-6.12) (6.03-7.06) (7.10-8.34) (7.93-9.36) (8.77-10.4) (9.62-11.5 10.8-12.9 11.7-14.1
) ( ) ( )
3.99 4.80 5.95 6.85 8.07 9.02 9.99 11.0 12.3 13.4
4-day
(3.70-4.29) 1 (4.45-5.17) 1 (5.52-6.42) (6.33-7.38) (7.43-8.69) (8.28-9.73) (9.13-10.8) 1 (10.0-11.9) 1 (11.2-13.4) (12.1-14.5)
4.60 5.51 6.71 7.64 F 8.86 F 9.82 10.8 11.8 13.1 14.1
7-day ( 10.8-12.6) (12.0-14.1) ( 12.8-15.2)
(4 .30-4.93) (5.14-5.90) (6.26-7.20) (7.11-8.19) (8.23-9.51) (9.09-10.5) (9.95-11.6) 11
5.27 6.28 7.55 8.51 9.77 10.7 11.7 12.7 14.0 15.0
10-day
(4.95-5.62) (5.89-6.70) (7.08-8.05) 1 (7.96-9.07) (9.12-10.4) (10.0-11.5) 1 (10.9-12.5) 1 1 (12.9-15.0) (13.7-16.0)
7.03 8.32 F 9.83 11.0 12.5 13.7 14.9 16.1 17.7 18.9
20-day
(6.64-7.45) (7.85-8.82) (9.26-10.4) (10.3-11.6) (11.8-13.3) (12.9-14.5) 1 (13.9-15.8) 11 (15.0-17.1) 1 (16.4-18.8) (17.5-20.1)
30-day 8.69 10.2 11.8 12.9 14.4 15.5 16.5 17.6 18.9 19.9
(8.29-9.12) (9.74-10.7) (11.2-12.4) (12.3-13.6) (13.7-15.1) (14.7-16.3) (15.7-17.4) (16.6-18.5) (17.8-19.9) (18.7-21.0)
11.0 12.8 14.5 15.7 17.3 18.4 19.5 F 20.6 22.0 23.0
45-day
(10.5-11.5) 1 (12.3-13.4) 11 (13.9-15.2) 1 (15.0-16.4) (16.5-18.1) (17.6-19.3) 1 (18.6-20.5) 1 (19.6-21.6) 1 (20.9-23.0) (21.8-24.1)
60-day 13.0 15.2 17.0 18.4 20.2 21.4 22.7 23.9 25.4 26.5
(12.5-13.6) (14.6-15.8) (16.3-17.8) (17.7-19.2) (19.3-21.0) (20.5-22.4) (21.7-23.7) (22.8-24.9) (24.2-26.6) (25.2-27.8)
1 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

25
E 20
Ld
a
5
t:u
PD5-based depth -duration -frequency {DDF) curves
Latitude: 35.7214', Longitude_-81.31031
c e e_ c c_ 6- L a, Z�, >. }, >, 7, 7 >, �',
L L
N f�7 4� CV -cp b 4 -0 b
n N N r~ cS N rr5 1D
m La Duration'
25 -
C 20 -
10
2
a
5
M
NOAAAtlas 14, Volume 2, Versian 3
p 0
F,
4 4 i4 4i ii r
Average recurrence interval (years)
ic
Created (GMT}_ Man Noy 77 17.17.54 202�
Back to Top
Maps & aerials
Small scale terrain
Average recurrence
interval
tyeara}
— 1
2
— 5
— 10
25
so
100
200
•— 600
1000
Duration
— 5-mn
— 2-day
— 14-min
— 3-day
15-rnln
— 4-day
— 3"in
— 7-d ay
— 60-min
— 10-day
— 2-hr
20-day
— 3-hr
— 30-day
— "ir
— 45-day
— 12-hr
— 5 D-day
24-hr

ongvi
2mi M,
Large scale terrain
%V
Kingsport' BI Stol
J011115011 city" Winston-Salem
�ti
•
Dul
Greensboro
jkI
FORTH C A R 0 L I N A
Charlotte
ter
I 00k
4MI T T n N T T WT A
Large scale map
Bri5fo
--ff
Greensborc
A h -11 k!�w; e2 North
Carolina
in-flOtte
North Carolina
rl tte
100km
60mi
Large scale aerial

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

Eastern Band of Cherokee Indians I Cherokee Trout Hatc Civil Calculations ���
Appendices
Appendix C — Drainage Area
Maps

1 04
7N\
9 ��� --�r o 'ri-j �%' .,.r:f-yj�'-� \ .� /p ?.% � i' ,,.. .��C � 1� l \ .` 1 a'�d t; �1,�`:�� � r\ � � .� ��-�'� �. /
4ro,
It
--rr
.2m
il/• 1J `\ .,J �) �ii/�/ -�r / 4� '�S �, .s ��- Ja _ ,Q ,�y�q�L� J-C - i ,ll -` , .t!)' 3 \1 tl \ _� .
00 / � � / � f�-� � �-' � 10: e !� �'� -ram._ `,• \V' . ��. U// r 1 �'- J �=J �V / /�`�.�" �. 1� �. "r O ,••1 ` r Ob \ \ C
7/
C.
6p
S(
'Wove
A5 -
�o
� � � � < �)) / ��i fir/ � ;. �,,��: � r � � -� � ' � \ `�' --� , �,;. - f :� .
-j
N-,
C9
43
FcIE2�-IFAIF�VIEW SOIL
SOIL GROUP: B
10
aN,
o� -� CfB- CLIFFORD SANDY LOAM
SOIL GR_ _
OUP: A
47-
01, F,
FcC-FAIRVIEW GRAVELLY FINE SANDY LOAM
SOIL GROUP: B
LEGEND
` YJ: \`�� \ `J� 1/ i //11� r/y(/I \� \ � .ram.-.. ✓ �_� ... �� � � `��-'� �/ � •1 I s
ram/ J
look!
WATERSHED BOUNDARY
TOC PATH
PROPOSED CULVERT
EXISTING CONTOUR
SOIL MAP
FEMA FLOODPLAIN
r
A� -

Eastern Band of Cherokee Indians I Cherokee Trout Hatc Civil Calculations ���
Appendices
Appendix D — Stormwater
Peak Flow Calculations

Composite S lm:)M�
Curve Numberer
PROJECT: Duke Energy Sweetwater Tap Relocation DATE: 11/22/2023
SCENARIO: PREPARED BY: CJS
Drainage Area: Culvert Total Drainage Area: 38.00 Ac
Hydrologic Soil Group
A B C D
Area Area Area Area
Cover Description Ac 1 CN Ac CN Ac 1 CN Ac 1 CN
Onen snace (lawns. narks. aolf courses. cemeteries. etc-1-
Poor condition (grass cover < 50%)
Fair condition(grass cover 50% to 75%
8.92 1 49
10.22 1 69
&
Good condition (grass cover > 75%)
1 39
1 61
80
llmnarvinus areas• I I I I
Paved parking lots, roofs, driveways, etc. (excluding R/W)
1 98
98
98
Paved streets and roads; curbs and storm sewers(excluding right
11.10 1 98
98
98
Paved streets and roads; open ditches (including R/W)
83
89
93
Gravel streets and roads (including R/W)
76
85
91
Dirt streets and roads (including R/W)
72
1 82
89
Western desert urban areas:
Natural desert landscaping (pervious areas only)
63
77
88
Artificial desert landscaping (impervious weed barrier, desert
96
96
96
Urban districts:
Commercial and business
89
92
11 94
95
Industrial
81
88
91
93
Residential districts by average lot size:
1/8 acre or less (town houses)
77
85
90
92
1/4 acre
61
75
83
87
1/3 acre
57
72
81
86
1/2 acre
54
70
80
85
1 acre
51
68
79
84
2 acres
46
65
77
82
Pasture, grassland or range:
Poor hydrologic condition
68
11 79
86
89
Fair hydrologic condition
49
69
79
84
Good hydrologic condition
39
61
74
80
Woods:
Poor hydrologic condition
45
i 66
77
83
Fair hydrologic condition
3.65 1 36
1 4.11 1 60
1 73
1 79
Good hydrologic condition
30
55
1 70
77
Cultivated Agricultural Areas:
Fallow Bare Soil Crop residue Cover Good Hydrolic Condition
83
i 88
i 90
Developing urban areas:
Newly graded areas (pervious areas only, no vegetation)
86
91
94
Total HSG Areas:
1 23.67
14.33
Calculated Total Drainage Area: 38.00 Ac
Calculated Composite Curve Number: 69

12/18/2023
Time of Concentration Worksheet
F:)R
SCS TR-55 Method
PROJECT: Sweetwater tap relocation
DATE: 11/22/23
SCENARIO: Post -Developed Conditions
PREPARED BY: Clarke Summers
Drainage Area Information
Drainage Area Tc Summary Data
DRAINAGE AREA ID:
Flow Type
Length (ft)
Elev. Diff.
Tc
TOTAL BASIN LENGTH: 1720.4 ft
Sheet Flow
100.0
4.00
13.2 mins.
TOTAL ELEVATION UP: 1158.60
Shallow Concentrated Flow
1620.4
116.70
6.2 mins.
TOTAL ELEVATION DOWN: 1037.90
Channel Flow - Rectangular
0.0
0.00
0.0 mins.
TOTAL ACRES: 38.00
Channel Flow - Triangular
0.0
0.00
0.0 mins.
Channel Flow - Trapezoidal
0.0
0.00
0.0 mins.
Channel Flow - Circular
0.0
0.00
0.0 mins.
Basin Totals1720.4
120.7019.4
mins.
This time of concentration calculation is based on survey data, aerial photography, and field investigation.
1. SHEET FLOW M
0 2. SHALLOW CONCENTRATED FLOW
Segment #1
Segment #2
Segment #3
Grass
Woods
Surface Description
Segment #1
Segment #2
Segment #3
0.15
0.40
Unpaved
Unpaved
Manning's "n"
Surface Description
3.35
3.12
130.4 ft
1490.0 ft
2- Year, 24- Hr. Rain Fall (In)
Flow Length (ft)
52.0 ft
48.0 ft
1154.60
1143.20
Flow Length (ft)
Elevation Up (ft)
1158.60
1157.30
1143.20
1037.90
Elevation Up (ft)
Elevation Down (ft)
1157.30
1154.60
0.087
0.071
Elevation Down (ft)
Watercourse Slope (ft/ft)
0.025
0.056
4.8
4.3
Land Slope (ft/ft)
Average Velocity (ft/Sec)
Time Of Concentration (Mins)
5.19
7.99
Time Of Concentration (Mins)
13.2 min.
Total
0.46
5.79
Total Sheet
Flow Tc (Minutes):
Shallow Concentrated
Tc (Mins):
6.2 min.
cApw rking\east01\d3580559\
Duke Energy Sweetwater TOCAsm POST-DA2

Culvert DA
Subcat Reach on Link

Sweetwater HydroCAD Type 11 24-hr 10-yr, 24-hr Rainfall=5.34"
Prepared by HDR, Inc Printed 12/15/2023
HydroCAD® 10.10-7b s/n 07102 © 2022 HydroCAD Software Solutions LLC Page 2
Time span=0.00-72.00 hrs, dt=0.02 hrs, 3601 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment1S: Culvert DA Runoff Area=38.000 ac 0.00% Impervious Runoff Depth=2.21"
Tc=19.4 min CN=69 Runoff=93.46 cfs 6.992 at
Total Runoff Area = 38.000 ac Runoff Volume = 6.992 of Average Runoff Depth = 2.21"
100.00% Pervious = 38.000 ac 0.00% Impervious = 0.000 ac

Sweetwater HydroCAD Type 11 24-hr 10-yr, 24-hr Rainfall=5.34"
Prepared by HDR, Inc Printed 12/15/2023
HydroCADO 10.10-7b s/n 07102 © 2022 HydroCAD Software Solutions LLC Page 3
Summary for Subcatchment 1S: Culvert DA
Runoff = 93.46 cfs @ 12.13 hrs, Volume= 6.992 af, Depth= 2.21"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.02 hrs
Type II 24-hr 10-yr, 24-hr Rainfall=5.34"
Area (ac) CN Description
38.000 69 Composite CN
38.000 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
19.4 Direct Entry,
Subcatchment 1S: Culvert DA
Hydrograph
100
95
90
I
93.46cfs
I I
I I I I I I I I I I I I I I I I I I I I I I I I I I I
_ _ 1 I _ I_ I_ I_ _ _I _I _I �1 1
1 1 1 1 1 1 1 IType lil 24-h �i
❑Runoff
-_
85
III_ _
_I _I _I I I I I I I I I I IIIIIIIIII I I I I���j I`, I
80
_ I_ I_I_
_I _ I_ I_ I_I_I_I _I _I _I — fir-
75
L 1- 1-1-
1 -1 J J J 1 1 1 1 L L L L L I- 1241hIr-RWnf61[6J 134`
70
65
1 1 1-
- I- I- -
-1-1--]A-444 -kt- I I I I 1 1/1���-t-44n�-k��
1 1 -1 -4 -4 4 4 4- - i-RAinQf�%lAr�ma=p.78. 00- aac
55
P
I I-
-I -I -I fi fi fi fi 10 1;IOLIM T �"t``F'�
0 45
-1 1 1-
-1-1-1-1-17TTTT777 IRuln6WQe-Oth�22V-
il:-
1- I- 1-
1 1 -1 -1 -T 7 T T T T T 7 7 1- 1- 1-1-1 -1 -1 -1 .7 T T T T T
1 1 1 7 T T T T 1 1 1 1 1 1 1 1 T ,� 19.4 M1m
35
30
25
20
15
_II_
IIIII
10
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)

Eastern Band of Cherokee Indians I Cherokee Trout Hatc Civil Calculations ���
Appendices
Appendix E — Culvert
Calculations

HY-8 Culvert Analysis Report
Crossing Discharge Data
Discharge Selection Method: Specify Minimum, Design, and Maximum Flow
Minimum Flow: 93.46 cfs
Design Flow: 93.46 cfs
Maximum Flow: 93.46 cfs
Table 1- Summary of Culvert Flows at Crossing: Duke SW
Headwater
Total
Culvert 1
Roadway
Iterations
Elevation (ft)
Discharge
Discharge
Discharge
(cfs)
(cfs)
(cfs)
1036.98
93.46
93.46
0.00
1
1036.98
93.46
93.46
0.00
1
1036.98
93.46
93.46
0.00
1
1036.98
93.46
93.46
0.00
1
1036.98
93.46
93.46
0.00
1
1036.98
93.46
93.46
0.00
1
1036.98
93.46
93.46
0.00
1
1036.98
93.46
93.46
0.00
1
1036.98
93.46
93.46
0.00
1
1036.98
93.46
93.46
0.00
1
1036.98
93.46
93.46
0.00
1
1040.50
202.72
202.72
0.00
Overtopping

Rating Curve Plot for Crossing: Duke SW
Total Rating Curve
Crossing: Duke SW
1040.!
1040A
1039.!
a
1039.1
w
a5
m
1038.!
m
aD
z
1038A
1037.!
1037A
V V V TV Total Discharge (ds) V V V V «
Culvert Data: Culvert 1
Table 1- Culvert Summary Table: Culvert 1
Total
Culve
Head
Inle
Outl
Fl
Nor
Criti
Out
Tailw
Outl
Tailw
Disch
rt
water
t
et
ow
mal
cal
let
ater
et
ater
arge
Disch
Elevat
Cont
Cont
Ty
Dep
Dep
De
Dept
Velo
Veloc
(cfs)
arge
ion
rol
rol
pe
th
th
pth
h (ft)
city
ity
(cfs)
(ft)
Dep
Dep
(ft)
(ft)
(ft)
(ft/s
(ft/s)
th
th
)
(ft)
(ft)
93.46
93.46
1036.9
3.24
3.50
7-
1.89
1.82
1.8
0.34
7.66
45.23
cfs
CfS
8
0
M2
2
C
93.46
93.46
1036.9
3.24
3.50
7-
1.89
1.82
1.8
0.34
7.66
45.23
cfs
CfS
8
0
M2
2
C
93.46
93.46
1036.9
3.24
3.50
7-
1.89
1.82
1.8
0.34
7.66
45.23
cfs
CfS
8
0
M2
2
C
93.46
93.46
1036.9
3.24
3.50
7-
1.89
1.82
1.8
0.34
7.66
45.23
cfs
CfS
8
0
M2
2
C

93.46
93.46
1036.9
3.24
3.50
7-
1.89
1.82
1.8
0.34
7.66
45.23
cfs
cfs
8
0
M 2
2
c
93.46
93.46
1036.9
3.24
3.50
7-
1.89
1.82
1.8
0.34
7.66
45.23
cfs
cfs
8
0
M 2
2
c
93.46
93.46
1036.9
3.24
3.50
7-
1.89
1.82
1.8
0.34
7.66
45.23
cfs
cfs
8
0
M 2
2
c
93.46
93.46
1036.9
3.24
3.50
7-
1.89
1.82
1.8
0.34
7.66
45.23
cfs
cfs
8
0
M 2
2
c
93.46
93.46
1036.9
3.24
3.50
7-
1.89
1.82
1.8
0.34
7.66
45.23
cfs
cfs
8
0
M 2
2
c
93.46
93.46
1036.9
3.24
3.50
7-
1.89
1.82
1.8
0.34
7.66
45.23
cfs
cfs
8
0
M 2
2
c
93.46
93.46
1036.9
3.24
3.50
7-
1.89
1.82
1.8
0.34
7.66
45.23
cfs
cfs
8
0
M 2
2
c
Culvert Barrel Data
Culvert Barrel Type Straight Culvert
Inlet Elevation (invert): 1033.48 ft,
Outlet Elevation (invert): 1032.60 ft
Culvert Length: 40.01 ft,
Culvert Slope: 0.0220

Culvert Performance Curve Plot: Culvert 1
1040.�
1040.0
1039.�
a
}
1039.0
a)
w
1038.0
co
m
a)
z 1038.0
1037.�
1037.0
Performance Curve
Culvert: Culvert 1
0 0
Inlet Control Elea Outlet Control Elev
IUU IGU 14U IOU IOU GUU GGU
Total Discharge (ds)

Water Surface Profile Plot for Culvert: Culvert 1
Crossmg - Duke SW, Design Discharge - 93.5 cfs
Cuh-ert - Cuh-ert 1. Culvert Discharge - 93.5 cfs
1040
1039
1038
1037
C
1036
}
aD
w
1035
1034
1033
1032
ACCESS
ROAD
83" x 57"
ELLIPTICAL CSP
WATER PROFILE HGL
1' STREAM
�EMBEDM�ENT
-------x
10 -5 0 5 10 15 20 25 30 35 40 45 50
Station (ft)
Site Data - Culvert 1
Site Data Option: Culvert Invert Data
Inlet Station: 0.00 ft
Inlet Elevation: 1032.48 ft
Outlet Station: 40.00 ft
Outlet Elevation: 1031.60 ft
Number of Barrels: 1
Culvert Data Summary - Culvert 1
Barrel Shape: Elliptical
Barrel Span: 83.00 in
Barrel Rise: 53.00 in
Barrel Material: Concrete
Embedment: 12.00 in

Barrel Manning's n: 0.0340 (top and sides)
Manning's n: 0.0350 (bottom)
Culvert Type: Straight
Inlet Configuration: Thin Edge Projecting (Ke=0.9)
Inlet Depression: None
Tailwater Data for Crossing: Duke SW
Table 2 - Downstream Channel Rating Curve (Crossing: Duke SW)
Flow (cfs)
Water
Velocity
Depth (ft)
Shear (psf)
Froude
Surface
(ft/s)
Number
Elev (ft)
93.46
1032.94
0.34
45.23
64.46
13.58
93.46
1032.94
0.34
45.23
64.46
13.58
93.46
1032.94
0.34
45.23
64.46
13.58
93.46
1032.94
0.34
45.23
64.46
13.58
93.46
1032.94
0.34
45.23
64.46
13.58
93.46
1032.94
0.34
45.23
64.46
13.58
93.46
1032.94
0.34
45.23
64.46
13.58
93.46
1032.94
0.34
45.23
64.46
13.58
93.46
1032.94
0.34
45.23
64.46
13.58
93.46
1032.94
0.34
45.23
64.46
13.58
93.46
1032.94
0.34
45.23
64.46
13.58
Tailwater Channel Data - Duke SW
Tailwater Channel Option: Rectangular Channel
Bottom Width: 6.00 ft
Channel Slope: 3.0000
Channel Manning's n: 0.0260
Channel Invert Elevation: 1032.60 ft
Roadway Data for Crossing: Duke SW
Roadway Profile Shape: Constant Roadway Elevation
Crest Length: 50.00 ft
Crest Elevation: 1040.50 ft
Roadway Surface: Gravel
Roadway Top Width: 20.00 ft

Eastern Band of Cherokee Indians I Cherokee Trout Hatc Civil Calculations ���
Appendices
Appendix F — Riprap
Calculations

Appendices
20
10
0
Culvert diameter
is 72" with 12"
embed.
Use Do=60" for
riprap calculations
3a
��I
Outlet w = Do + to
pipe
diameter (Do)
La
T flwater - 0.51)Q
ot` � IZP
t
of p� 6ve
50
Discharge {ft3/sec}
,I 80
200
Q,o = 95 cfs
Used:
La = 32'
3Do = 18'
W=22'
2
0
Ln
a
1 a
— d=60
.1..J 0
1000
Curves may not be extrapolated.
Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition (Tw r 05 diameter).
Rev. 12/93
Use Class 2 Riprap:
dso = 14"
d_ = 28"
depth = 2.5'
8.06.3

Trapezoidal Riprap-Lined Waterway Design.xlsm
Landowner Duke Energy County Catawba County V 1.2015
Computed By VH Date 12/15/2023 1/15/2015
Checked by KM Date 12/18/2023
Note: Macros must be enabled in this spreadsheet in order for the "Solve" button to work.
Design flow, Q=
93.46 cfs
Slope, S=
0.05 ft/ft = 20.00 :1
Bottom Width, W=
6 ft
Side slope, Z=
5 :1
Safety factor=
1.2 Typically 1.2
Rock shape =
Angular
Min. req'd D50=
8.10 in
D50 used=
14.00 in
n=
0.045
Freeboard=
0.25 ft
WW horiz. Length=
32.0 ft
U/S WW F.L. elev=
1036.0 ft
D/S WW F.L. elev=
1034.4 ft
Waterway drop=
1.6 ft
WW length along slope=
32.0 ft
Spreadsheet formatting key:
XXX =Input cells
X.XX =Output from "Solve" button
X.XX =Other computed output
Red text =Instructions, warnings, info
Flow depth, d= 1.21 ft Calculated
Critical depth, dc= 1.36 ft
Critical slope, Sc= 0.031 ft/ft 0.7Sc = 0.0214 ft/ft
1.3SC = 0.0397 ft/ft
Design slope, S= 0.0500 ft/ft Design slope OK. Flow is Supercritical.
Velocity= 6.41 fps Est. riprap unit wt=
Rock shape = Angular Rock Gs =
Riprap thickness:
Minimum= 2.33 ft
Provided= 2.50 ft
Sideslope height:
Minimum= 1.46 ft
Provided= 1.60 ft
1.4 Tons/CY
2.65
Required riprap gradation for D50 selected
Rock dia., inches
Rock weight, lb
Smaller
min.
max.
min.
max.
100
21.0
28.0
675
1600
85
18.2
25.2
439
1166
50
14.0
21.0
200
675
10
1 11.21
18.2
1021
439
8.0 ft
6.0 ft
1.6 ft
�-----------Riprap----- '''
\�
Quantities:
Riprap volume= 104.8 CY �� 6.5 ft
Approx. weight= 146.7 Tons Geotextile WW CROSS SECTION
Geotextile area= 303.7 SY*
32.0 ft
*Geotextile area
includes actual covered 2.5 ft 1 -----
surfaces only (no extra Riprap 20.00 ;
for laps or anchorage) Geotextile WW PROFILE

FYZ
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440 South Church Street, Suite 1200
Charlotte, NC 28202
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