SW5220102_Stormwater Report_20220428

HYDROLOGY AND EROSION CONTROL STUDY
FOR
East Nash Solar Array
US64A
Spring Hope, NC 27882
PIN 2860-0076-4551
CDC project No. 12139
1
Pine Gate Renewables, LLC
130 Roberts Street
Asheville, NC 28801
Contact: Matt Abbott
[phone]
FNC.TNFFR
Greg Hoffman, PE
IP PP
SEAL
P P
- 0 035093
December 17, 2021
CDCCMI
PA
168 Patton Avenue, Asheville, NC 28801
828-252-5388

TABLE OF CONTENTS
ITEM/DESCRIPTION PAGE NO.
1.0 Project Narrative........................................................................................... 1
2.0 Erosion Controls........................................................................................... 1
APPENDICES
Appendix A
USGS Topo Map & Deed
Appendix B
NCDEQ Checklist
Appendix C
FEMA Firm Map
Appendix D
USDA NRCS Soils Report
Appendix E
Skimmer/Sediment Basin Design Calculations
Appendix F
Channel Protection
Appendix G
Rainfall Depth Data

1.0 INTRODUCTION
The project is located at US-64A within the jurisdictional limits of the Town of Spring Hope. The
parcel is 331 acres. The project will disturb approximately 198 acres. Adjacent to the site is
undeveloped land to the north and west, a solar farm to the south, and a church to the east. The parcel
was previously farmland and consists of an existing soil road and existing accessory buildings. During
development, the East Nash substation will be under construction. The existing site consists of slopes
ranging from 2% to 6% of stable soils. A USGS Topo map and property deed are included in
Appendix A. The design checklist for the NCDEQ is included in Appendix B.
For part of the site, stormwater drains from northeast to southwest towards existing wetlands at the
west side of the property. Flow from the wetlands ultimately makes its way to an existing culvert. The
other part of the site drains from northwest to southeast towards existing wetlands at the east of the
property. These wetlands discharge to a second existing culvert.
It is the intent of this report to demonstrate that the proposed project will comply with low -density
requirements for stormwater in accordance with the NCDEQ stormwater manual. The use of vegetated
conveyances and flow dispersion through vegetated areas will be used to help mitigate any impact on
the downstream area. 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 331 acres. Approximately 198 acres will be disturbed by construction activities.
The FEMA Map for this parcel is included in Appendix C. A USDA NRCS Soils Report is included
in Appendix D.
Erosion controls will be completed in a two-phase approach. Refer to the construction plans for further
detail on the erosion control measures. Phase 1 will include site clearing and rough grading. During
this phase, erosion control devices will consist of a construction entrance(s), perimeter silt fences,
temporary ditches, skimmer basins, and sediment basins. Calculations to support the sizing of the
basins are present in Appendix E.
Phase 2 will include site development and utility installation. During this phase inlet protection will be
added as construction progresses. Reinforcement fabrics will be installed in permanent ditches as
needed. Rip rap aprons will be added to pipe outfalls. The site will be stabilized with vegetation and
gravel. Calculations associated with channel stabilization are provided in Appendix F.

APPENDIX A
USGS Topo
Property Deed

U.S. DESRGEON GI❑CAL SURVEY U.S.
science for a changing world
-78,1250
36.0000 ° 7 60000mE 61 62
3987000mN
86
85
84
83
82
81
80
79
78
77
76
75
74
35.8750' 60
-78.1250'
The National Map
USTopo
63 64 65
67
68
SPRING HOPE QUADRANGLE
NORTH CAROLINA - NASH COUNTY
7.5-MINUTE SERIES
-78.0000
69 70 36.0000
88
61 62 63 64 65 66 67 68 69 7700"mE
Produced by the United States Geological Survey any ' SCALE 1:24 000
North American Datum of 1983 (NAD83)
World Geodetic System of 1984 (WGS84). Projection and N 1 0.5 0 KILOMETERS 1 2
1 D00-meter grid:Universal Transverse Mercator, Tone 17S
This map is not a legal document. Boundaries may be _ .. 9"42' 1000 5D0 0 METERS 1000 2000
generalized for this map scale. Private (ands within government »2 MILS 1 0.5 0 1
1.44'
reservations may not be shown. Obtain permission before 31 MILS MILES
entering private lands. 1000 0 10DD 200D 30DO 400D 5000 6000 7000 8ODD 9000 10000
Imagery ........... .................................... ......NAIP, May 2016 - November 2016 FEET
Roads..... ... ........... .................... U.S. Census Bureau, 2D16 UTM GRID AND 2019 MAGNETIC NORTH
Names... .........................................................................GNIS, 1980 - 2019 DECLINATION AT CENTER OF SHEET
Hydrography................................National Hydrography Dataset, 2004 - 2018 CONTOUR INTERVAL 10 FEET
Contours............................................National Elevation Dataset, 2008 U.S. National Grid NORTH AMERICAN VERTICAL DATUM OF 1988
Boundaries ..............Multiple sources; see metadata file 2017 2D18 100,000-m5quarnID
Wetlands.................FWS National Wetlands Inventory 1982 1983 This map was produced to conform with the
RV National Geospatial Program US Topo Product Standard, 2011.
A metadata file associated With this product is draft version 0.6.18
Grid Zone Designation
175
NDRTF*
OLINA
QUADRANGLE LOCATIOH
1 Justice
1 2 3 2 Castalia
3 Red Oak
4 5 4 Bunn East
5 Nashville
6 Middlesex
6 7 8 7 Bailey
8 Winstead Crossroads
ADJOINING QUADRANGLES
87
86
85
84
83
82
81
m
79
78
77
76
3975000"N
78.0000` 35,8750"
ROAD CLASSIFICATION
00
Expressway Local Connector
n
to
Secondary Hwy Local Road
N N
Ramp 4WD
Interstate Route US Route State Route
Y
M
N
(x
4 �
co
D Z
r` U.
W
SPRING HOPE, NC
y a
2019
a z

PPXe 1 of P
This certifies that there are no delinquent ad valorem real estate taxes, which the Nash
County Tape Collector is charged with collecting, that are a hen on:
PinNumbec QU� a �� e B 2 bb C.C• a
This is not a certification that this Nash County Tax Department Pin Number matches this
Deed description.
Date:
Tax Collector, Deputy Tax Collector, Tax Clerk
oommiiiiAi �no�ii o0o ii iii sr
Doc ID; 006967840006 Tvoe: CRP
Recorded: 04/06/2016 at 11:59:44 AM
Fee Amt: $196.00 Paoe 1 of 6
Revenue Tax: $270.00
Nash County North Carolina
Anne J. Melvin Resister of Deeds
sK2819 P�614-619
NORTH CAROLINA GENERAL WARRANTY DEED
PREPARED BY: Randall B. Pridgen
Battle, Winslow, Scott & Wiley, P.A.
P. O. Box 7100
Rocky Mount, NC 27804-0100
Parcel Nos.: 009652; 044082 and 009662
NORTH CAROLINA
IZET-1- M 01111 l`►Y_"
REVENUE STANTS $170.00
THIS DEED, made and entered into this the 1 st day of April, 2016, by and between JEAN
CHAMBLEE THOMAS and husband, EDWARD J. THOMAS, whose address is 3353 Shaman
Court, Winterville, NC 28590, Grantor, to SND, LLC, a North Carolina limited liability company,
whose address is 76I0 Six Forks Road, Raleigh, North Carolina 27615-5047, Grantee.
The designation Grantor and Grantee as used herein shall include said parties, their heirs,
successors and assigns, and shall include singular, plural, masculine, feminine or neuter as required
by context.
WITNESSETH:
THAT FOR AND IN CONSIDERATION of the sum of TEN DOLLARS ($10.00) cash in
hand paid by the Grantee unto the Grantor, and other good and valuable consideration, the receipt of
which is hereby acknowledged, the Grantor does hereby bargain, sell, grant and convey, unto the
Grantee, in fee simple, a one-fourth (1/4) undivided interest in that certain property lying and being
in Nash County, North Carolina, and more particularly described as follows, to -wit:
Lo
Book:2819 Page:614 Seq: 1

See Exhibit A attached hereto and made a part hereof (the "Property")
TO HAVE AND TO HOLD the aforesaid one-fourth (1/4) undivided interest in and to the
Property together with all privileges and appurtenances thereunto belonging or in anywise
appertaining to said Grantee, its successors and assigns, in fee simple, forever.
The Property is not a principal residence of Grantor.
AND, the said Grantor, for herself, her heirs, successors and assigns, covenants with said
Grantee, its successors and assigns, that she is seized in fee simple of a one-fourth (1/4) undivided
interest in the Property and has the right to convey the same in fee simple, that title to the Property is
marketable and free and clear from all encumbrances except for the exceptions hereinafter stated, and
that they will warrant and defend the title to the same against all claims of all persons whomsoever.
This Conveyance is made subject to the following:
1. Matters of zoning and local land use ordinances and regulations affecting the
property, as well as any state/federal Iaw matters restricting the use of any portion of the Property
which may be designated as "wet lands" or "flood zone";
Property;
2. Utility casements and rights of way of record crossing the Property;
3. All matters which would be revealed by a current and accurate survey of the
4. Restrictions, reservations, agreements, easements, and rights of way as may
appear as a matter of pubic record; and
5. Current years' ad valorem taxes to be prorated at closing.
Book:2819 Page:614 Seq:2

We1ofP
IN WITNESS WHEREOF, the Grantor has caused this instrument to be signed as of the day
and year first above written.
NORTH CAROLINA
COUNTY OF /vas k
y1 i. me, 41te.w S , a Notary Public of AiaS In County and
State of , do hereby certify that Jean Chamblee Thomas (the "Signatory"),
personally appeared before me this day and by authority duly given, acknowledged the due execution of the
foregoing instrument.
I certify that the Signatory personally appeared before me the day, and (check one of the following):
(I have personal knowledge of the identity of the Signatory); or
(I have seen satisfactory evidence of the Signatory's identity, by a current or state or federal
identification with the Signatory's photograph in the form of. (check one of the following)
a drivers license or
in the form of ; or
(a credible witness has sworn to the identity of the Signatory).
The Signatory acknowledged to me that he/she voluntarily signed the foregoing document for the
purpose stated therein and in the capacity indicated.
Witness my hand and official stamp or seal this U``' day of Aar,: , 2016.
JA1. P,(2 ignature)
Notary Public
HEATHER M. MAITHEWS
NoboPubNc �Pa-[-��r �• 1?7!a4_4 ll Aj-s (Print/type)
Nash County, NC Notary Public
(Note: Notary Public must sign exactly as on notary seal)
My Commission Expires: 04- a o - ao 1( o
[NOTARY SEAL]
(MUST BE FULLY LEGIBLE)
[look 2819 Page 614 Seq 3

PAVe4of8
612
ward J. Thomas
NORTH CAROL
COUNTY OF
I, �,$SLt t! • �%n a Notary Public of
County and State of do hereby certifythat
Edward J. Thomas (the "Signatory"), personally appeared before me this day and by
authority duly given, acknowledged the due execution of the foregoing instrument.
I certify that the Signatory personally appeared before me the day, and (check one of
the following):
(I have personal knowledge of the identity of the Signatory); or
- (I have seen satisfactory evidence of the Signatory's identity, by a current or state or
federal identification with the Signatory's photograph in the form of: (check one of
the following)
/a drivers license or
in the form of ); or
(a credible witness has sworn to the identity of the Signatory).
The Signatory acknowledged to me that he/she voluntarily signed the foregoing
document for the purpose stated therein and in the capacity indicated.
Witness my hand and official stamp or seal this day of
2016.
UDJ&,02� a,,61"j
(Signature)
Notary Public
fSS i (Print/
type)
Notary Public
(Note: Notary Public must sign exactly as on notary
seal)
------------
My Commission Expires: i ` b �- FSUTATEN0P1Fn:K0RTH
L ARRINGTON
ARY PUBLIC
T COUNTY
CAROLINA
Book 2819 Page 614 Seq 4

6 lLlT
EXHIBIT "A"
Tract One and Tract Two Parcel ID: 009652
2 0 : Beginning at a pine in the edge of Sappony Swamp;
thence North 87 deg. west 85 poles to a stake; thence North 4
degrees East 133 poles to a pine; thence North 88 deg. West 48
poles to a pine; North 86 deg. West 153 112 poles to a stake;
thence South 4 deg. West 57 1/2 poles to a stake; thence South 86
deg. East 134 poles to a stake; thence South 5 1/2 deg. West 55
poles to a red oak; thence South 4 1/2 deg. West 40 1/2 poles to a
stake in edge. of Horse Pen Branch; thence down the meanders of
Horse Pen Branch to the Junction with Sappony Creek or Swamp;
thence up the meanders of Sappony Creek or Swamp to the point of
beginning, containing 313 1/2 acres by survey of Mack Brantley. It
being same tract of land conveyed to Venja W. Upchurch by James T.
Webb and wife by deed dated August 25, 1873. It being the same
land inherited by J. E. Upchurch from the said B. W. Upchurch.
TRACT TWO: Beginning at a stake in B. W. Upchurch's line and
running thence 30 poles to a stake in place of a hickory now gone;
thence S. 87 deg. E. 86 poles to a stake and pine in the run of
Sappony Creek; thence up the various courses of said creek to a
black gum; thence N. 87 deg. E. 91.5 poles to the beginning,
containing 17 acres, more or less, and being the identical land
conveyed to J. B. Goode by W. D. Manning and wife, by deed recorded
in Book 220, Page 549, Nash Registry. For further reference, see
deed recorded in Book 486, Page 313, Nash County Registry.
Tract Three Parcel Ill: 044082
TRACT THREE: one lot or parcel of land in Mannings Township, Nash
County, North Carolina, and known on plat as Lot No. 20 lying on
the North side of the alley, bounded as follows: commencing at a
stake on alley, corner of lot No. 19; thence North 112 yards to a
sweet gum; thence up the Horse Pen Branch to a sweet gum 58 yards,
corner of Lot No. 21; thence S. 148 deg. to a stake corner of Lot
No. 21; thence S. 80 deg. E. along the alley 58 yards to the
beginning, containing 7540 square yards more or less. See deed
from C. H. Rogers and wife to C. W. Lassiter, recorded in Book 311,
Page 485 for further description. All of our right, title and
interest in and to the following described tract of land in
Mannings Township, Nash County, North Carolina, lying on the North
side of Highway No. U. S. 64, being near the Town of Spring Hope
and described as follows: all that tract or parcel of land allotted
to J. W. Valentine in ttie division of his father's estate, the late
J. H. Valentine, and also the land deeded to J. W. Valentine by W.
W. Batchelor, being the identical land conveyed by J. J. Wilson to
J. S. Wilson by deed dated July 1st, 1924 and recorded in Book 293,
on Page 542, Nash county Registry. The purpose and intent of this
deed is to convey all the land on the north side of U. S. Highway
No. 64 heretofore conveyed to C. W. Lassiter by C. H. Robers and J.
W. Valentine. For further reference, see deed recorded in Book
446, Paqe 195, Nash County Reaistrv.
Book 2819 Page 614 Seq 5

6!
EXHIBIT "A" (continued)
Tract Four Parcel ID: 009662
ACT FOUR: BEGINNING at an oafs stump in corner of J. L. Wood and
J. B. Wood's lines; thence with line of J. B. Wood North 4 deg. 15
min. E. 854 ft. to ar. iron stake in corner of line of J. B. Wood
and George May; thence with line of George May South 86 deg. 00
min. E. 593 ft. to a stake in line of George May and J. B. Wood;
thence with line of J. B. Wood South 3 deg. 00 min. West 1370 ft.
to a stake in line of J. B. Wood and J. L. Wood; thence with line
of J. L. Wood North 51 deg. 00 min. West 75B ft. to the point of
beginning, containing 15 acres by survey of W. F. Beal made
November, 1943, and being the part of the Ricks land owned by J. E.
Upchurch, and bought from J. P,. Bunn, Commissioner and being the
identical real property described in quitclaim deed dated December
30, 1943 from J. B. Wood et ux to J. E. Upchurch and recorded in
Book 486 at Pacge 425, Nash County Reqistry.
Together with (i) all down and standing trees, merchantable or otherwise, now or hereafter
growing on the Property and (ii) all oil, gas, minerals, mineral rights, subsurface materials,
extractable materials and deposits.
Hook 2819 Page 611 Seq 6

APPENDIX B
NCDEQ
Erosion Control Design Checklist

EROSION and SEDIMENTATION CONTROL PLAN PRELIMINARY REVIEW CHECKLIST
The following items shall be incorporated with respect to specific site conditions, in an erosion & sedimentation control plan:
NPDES Construction Stormwater General Permit NCG010000
Designation on the plans where the 7 or 14 day ground stabilization requirements apply per Part II.E.1 of the permit.
Design of basins with one acre or more of drainage area for surface withdrawal as per Part II.B.8 of the permit.
LOCATION INFORMATION
Project location & labeled vicinity map (roads, streets, landmarks)
North arrow and scale
Identify River Basin.
Provide a copy of site located on applicable USGS quadrangle and
NRCS Soils maps if it is in a River Basin with Riparian Buffer
requirements.
GENERAL SITE FEATURES (Plan elements)
Property lines & ownership ID for adjoining properties
Existing contours (topographic lines)
Proposed contours
Limits of disturbed area (provide acreage total, delineate limits,
and label). Be sure to include all access to measures, lots that will
be disturbed, and utilities that may extend offsite.
Planned and existing building locations and elevations
Planned & existing road locations & elevations, including
temporary access roads
Lot and/or building numbers
Hydrogeologic features: rock outcrops, seeps, springs, wetland
and their limits, streams, lakes, ponds, dams, etc. (include all
required local or state buffer zones and any DWQ Riparian Buffer
determinations)
Easements and drainageways, particularly required for offsite
affected areas. Include copies of any recorded easements and/or
agreements with adjoining property owners.
Profiles of streets, utilities, ditch lines, etc.
Stockpiled topsoil or subsoil locations
If the same person conducts the land -disturbing activity & any
related borrow or waste activity, the related borrow or waste
activity shall constitute part of the land -disturbing activity unless
the borrow or waste activity is regulated under the Mining Act of
1971, or is a landfill regulated by the Division of Waste
Management. If the land -disturbing activity and any related
borrow or waste activity are not conducted by the same person,
they shall be considered separate land -disturbing activities and
must be permitted either through the Sedimentation Pollution
Control Act as a one -use borrow site or through the Mining Act.
Location and details associated with any onsite stone crushing or
other processing of material excavated. If the affected area
associated with excavation, processing, stockpiles and transport
of such materials will comprise 1 or more acres, and materials will
be leaving the development tract, a mining permit will be required.
Required Army Corps 404 permit and Water Quality 401
certification (e.g. stream disturbances over 150 linear feet)
EROSION & SEDIMENT CONTROL MEASURES (on plan)
s Legend (provide appropriate symbols for all measures and
reference them to the construction details)
• Location of temporary measures
s Location of permanent measures
Construction drawings and details for
temporary and permanent measures. Show measures to scale on
plan and include proposed contours where necessary. Ensure
design storage requirements are maintained through all phases of
construction.
Maintenance requirements for measures
Contact person responsible for maintenance
SITE DRAINAGE FEATURES
Existing and planned drainage patterns (include off -site areas that
drain through project and address temporary and permanent
conveyance of stormwater over graded slopes)
Method used to determine acreage of land being disturbed and
drainage areas to all proposed measures (e.g. delineation map)
Size, pipe material and location of culverts and sewers
Soil information: type, special characteristics
Soil information below culvert storm outlets
Name and classification of receiving water course or name of
municipal operator (only where stormwater discharges are to
occur)
STORMWATER CALCULATIONS
Pre -construction runoff calculations for each outlet from the site (at
peak discharge points). Be sure to provide all supporting data for
the computation methods used (rainfall data for required storm
events, time of concentration/storm duration, and runoff
coefficients).
Design calculations for peak discharges of runoff (including the
construction phase & the final runoff coefficients for the site)
Design talcs for culverts and storm sewers (include HW, TW and
outlet velocities)
Discharge and velocity calculations for open channel and ditch
flows (easement & rights -of -way)
Design calcs for cross sections and method of stabilization for
existing and planned channels (include temporary linings). Include
appropriate permissible velocity and/or shear stress data.
Design calcs and construction details for energy dissipaters below
culvert and storm sewer outlets (include stone/material specs &
apron dimensions). Avoid discharges on fill slopes.
Design calcs and dimension of sediment basins (note current
surface area and dewatering standards as well as diversion of
runoff to the basins). Be sure that all surface drains, including
ditches and berms, will have positive drainage to the basins.
VEGETATIVE STABILIZATION
Area & acreage to be stabilized with vegetation
Method of soil preparation
Seed type & rates (temporary & permanent)
Fertilizer type and rates
Mulch type and rates (include mulch anchoring methods)
NOTE: Plan should include provisions for groundcover in accordance with
NPDES Construction Stormwater General Permit NCG010000.
FINANCIAL RESPONSIBILITY/OWNERSHIP FORM
Completed, signed & notarized FR/O Form
Accurate application fee payable to NCDEQ ($65.00 per acre
rounded up the next acre with no ceiling amount)
Certificate of assumed name, if the owner is a partnership
Name of Registered Agent (if applicable)
Copy of the most current Deed for the site. Please make sure the
deed(s) and ownership information are consistent between the
plan sheets, local records and this form.
Provide latitude & longitude (in decimal degrees) at the project
entrance.
Two hard -copies of the plans (some regional offices require
additional plans or multiple sizes; please contact the regional
coordinator prior to such submittal.)
NOTE: For the Express Permitting Option, inquire at the local Regional
Office for availability. Express Reviews are performed by
appointment only.
NARRATIVE AND CONSTRUCTION SEQUENCE
Narrative describing the nature & purpose of the construction
activity.
Construction sequence related to erosion and sediment control
(including installation of critical measures prior to the initiation of
the land -disturbing activity & removal of measures after areas they
serve are permanently stabilized). Address all phases of
construction and necessary practices associated with temporary
stream bypasses and/or crossings.
Bid specifications related only to erosion control
rev. 05142019

APPENDIX C
FEMA FIRM Map

National Flood Hazard Layer FIRMette .., FEMA
Legend
78°5'58"W 35°57'37"N
0 250 500 1,000 1,500 2,000
Basemap: USGS National Map: Orthoimagery. Data refreshed October, 2020
SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT
Without Base Flood Elevation (BFE)
Zone A, V, A99
SPECIAL FLOOD With BFE or Depth Zone AE, AO, AH, VE, AR
HAZARD AREAS Regulatory Floodway
0.2%Annual Chance Flood Hazard, Areas
of 1% annual chance flood with average
depth less than one foot or with drainage
areas of less than one square mile zone x
_Future Conditions 1% Annual
Chance Flood Hazard zonex
Area with Reduced Flood Risk due to
OTHER AREAS OF Levee. See Notes. zone x
FLOOD HAZARD ��� Area with Flood Risk due to Leveezone D
NO SCREEN Area of Minimal Flood Hazard zonex
Q Effective LOMRs
OTHER AREAS Area of Undetermined Flood Hazard zone
GENERAL -- - - Channel, Culvert, or Storm Sewer
STRUCTURES IIIIIII Levee, Dike, or Floodwall
cl Cross Sections with 1% Annual Chance
t7•s Water Surface Elevation
a - - - Coastal Transect
^-^^-5n— Base Flood Elevation Line (BFE)
Limit of Study
Jurisdiction Boundary
— --- Coastal Transect Baseline
OTHER
_ Profile Baseline
FEATURES
Hydrographic Feature
Digital Data Available N
No Digital Data Available
MAP PANELS
Unmapped
YThe
pin displayed on the map is an approximate
point selected by the user and does not represent
an authoritative property location.
This map complies with FEMA's standards for the use of
digital flood maps if it is not void as described below.
The basemap shown complies with FEMA's basemap
accuracy standards
The flood hazard information is derived directly from the
authoritative NFHL web services provided by FEMA. This map
was exported on 6/10/2021 at 7:06 AM and does not
reflect changes or amendments subsequent to this date and
time. The NFHL and effective information may change or
become superseded by new data over time.
This map image is void if the one or more of the following map
elements do not appear: basemap imagery, flood zone labels,
legend, scale bar, map creation date, community identifiers,
FIRM panel number, and FIRM effective date. Map images for
unmapped and unmodernized areas cannot be used for
regulatory purposes.

APPENDIX D
USDA NRCS Soils Report

an
GeE
W I-
Nrn
35' 52"
i
U. S. DEPARTMENT OF AGRICULTURE
SOIL CONSERVATION SERVICE
N
5000 4000 3000 2000 1000 0 ODD i0000 Feet
This map was Compiled by U.S. Department of Agriculture,
Soil Conservation Service and cooperating agencies on 1980 1 5 0 t ? 3 Kiinineters
photography obtained from U.S. Department of Interior, Scale • 1:24000
Geological Survey.
NASH COUNTY, NORTH CAROLINA NO. 7
SHEET NUMBER 7
NASH COUNTY, NORTH CAROLI NA
u�r 7$' 00
0 ()0.
SHEET NO, 7 OF 12

r
WAKE
COUNTY
Eoeh area ourldred on ft ntap rmtslus of
roar? rhan am k,r d or aril. the rnop rs rhos
nseant by general plannlny rather Nkln o basis
for de islans on the use of sprelrM trxrs
L E G E N❑
NORFOLK-RAINS: Nearly level to gently sloping, well drained and poorly
BONNEAU-NORFOLK: Nearly level to gently sloping, well drained soils that on uplands
have a loamy subsoil;
LLIWEHADKEE•ALTAVISTA-WICKHAM: Nearly level, poorly drained, moderately
well drained, and well drained sails that have a loamy subsoil; on flood plains
and terraces
drained soils that have a loamy or clayey subsoil; on uplands
NORFOLK•GEORGEVILLE RAINS Nearly level to gently sloping, well drained
and poorly drained soils that have a loamy or clayey subsoil; an uplands
-RAINS NORFOLK-GOLDSBORO: Nearly level to gently sloping, poorly drained,
well drained, and moderately well drained sails that have a loamy or clayey
subsoil; an uplands
GEORGEVILLE•NASON: Gently sloping to steep, well drained soils that have a
clayey or loamy subsoil; on uplands
WEDOWEE•WORSHAM-HELENA: Nearly level to gently sloping, well drained,
poorly drained, and moderately well drained soils that have a clayey or loamy
subsoil; on uplands
- DOTHAN-AUTRYVILLE: Nearly level to gently sloping, well drained sods that
have a loamy subsoil; on uplands
Compared 1986
U-S- DEPARTMENT OF AGRICULTURE
SOIL CONSERVATION SERVICE
NORTH CAROLINA DEPARTMENT OF NATURAL RESOURCES AND COMMUNITY DEVELOPMENT
NORTH CAROLINA AGRICULTURAL EXTENSION SERVICE
NORTH CAROLINA AGRICULTURAL RESEARCH SERVICE
NASH COUNTY BOARD OF COMMISSIONERS
GENERAL SOIL MAP
NASH COUNTY, NORTH CAROLINA
Scale 1:253.440
1 9 1 2 3 4 Mikes
h..I I I I I
1 0 4 8 Km
Lyl 1 I I I l I l

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
Nash County,
North Carolina
June 9, 2021

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
SoilMap.................................................................................................................. 5
SoilMap................................................................................................................6
Legend..................................................................................................................7
MapUnit Legend.................................................................................................. 8
MapUnit Descriptions.......................................................................................... 8
Nash County, North Carolina.......................................................................... 10
GhB—Georgeville-Urban land complex, 0 to 6 percent slopes...................10
NoB—Norfolk loamy sand, 2 to 6 percent slopes........................................11
NrB—Norfolk, Georgeville, and Faceville soils, 2 to 8 percent slopes........ 12
RaA—Rains fine sandy loam, 0 to 2 percent slopes, Southern Coastal
Plain......................................................................................................14
Wh—Wehadkee loam, 0 to 2 percent slopes, frequently flooded ............... 16
References............................................................................................................19
Glossary................................................................................................................ 21
4

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
761600 761900 762000 762100
35° 5730" N
I
35° 573" N
761500 761900 762000 762100 762200
3
Map Scale: 1:4,100 if printed on A portrait (8.5" x 11") sheet.
Meters N
0 50 100 200 300
Feet
0 150 300 600 900
Map projection: Web Mercator Comer coordinates: WGS84 Edge tics: UTM Zone 17N WGS84
6
762200
762300
762300
N
W
762400
35° 5730" N
35' 573' N
762466

MAP LEGEND
Area of Interest (AOI)
0
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
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
oa
Sodic Spot
Custom Soil Resource Report
MAP INFORMATION
A
Spoil Area
The soil surveys that comprise your AOI were mapped at
1:24,000.
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
�}}
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: Nash County, North Carolina
Survey Area Data: Version 19, Jun 4, 2020
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Oct 22, 2018—Oct
25, 2018
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
GhB
Georgeville-Urban land
3.7
7.6%
complex, 0 to 6 percent
slopes
Norfolk loamy sand, 2 to 6
25.7%
NoB
12.6
percent slopes
NrB
Norfolk, Georgeville, and
0.7
1.5%
Faceville soils, 2 to 8 percent
slopes
RaA
Rains fine sandy loam, 0 to 2
5.5
11.1 %
percent slopes, Southern
Coastal Plain
Wh
Wehadkee loam, 0 to 2 percent
26.5
54.2%
slopes, frequently flooded
Totals for Area of Interest
49.0
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
descriptions along with some characteristics of each. A few areas of minor
components may not have been observed, and consequently they are not
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Custom Soil Resource Report
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.
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Custom Soil Resource Report
Nash County, North Carolina
GhB—Georgeville-Urban land complex, 0 to 6 percent slopes
Map Unit Setting
National map unit symbol: 3gdp
Elevation: 270 to 700 feet
Mean annual precipitation: 37 to 60 inches
Mean annual air temperature: 59 to 66 degrees F
Frost -free period: 200 to 240 days
Farmland classification: Not prime farmland
Map Unit Composition
Georgeville and similar soils: 55 percent
Urban land: 40 percent
Minor components: 5 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Georgeville
Setting
Landform: Interfluves
Landform position (two-dimensional): Summit, shoulder
Landform position (three-dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Convex
Parent material: Residuum weathered from metavolcanics and/or argillite
Typical profile
A - 0 to 8 inches: silt loam
Bt1 - 8 to 15 inches: clay loam
Bt2 - 15 to 45 inches: clay
BC - 45 to 80 inches: loam
Properties and qualities
Slope: 2 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 capacity. Moderate (about 8.5 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: B
Hydric soil rating: No
Description of Urban Land
Setting
Parent material: Impervious layers over human transported material
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Custom Soil Resource Report
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 8
Hydric soil rating: No
Minor Components
Tarrus
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
NoB—Norfolk loamy sand, 2 to 6 percent slopes
Map Unit Setting
National map unit symbol: 2v75y
Elevation: 30 to 450 feet
Mean annual precipitation: 38 to 55 inches
Mean annual air temperature: 59 to 70 degrees F
Frost -free period: 200 to 280 days
Farmland classification: All areas are prime farmland
Map Unit Composition
Norfolk and similar soils: 83 percent
Minor components: 17 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Norfolk
Setting
Landform: Flats on marine terraces, broad interstream divides on marine terraces
Landform position (three-dimensional): Talf
Down -slope shape: Linear, convex
Across -slope shape: Linear, convex
Parent material: Loamy marine deposits
Typical profile
Ap - 0 to 8 inches: loamy sand
E - 8 to 14 inches: loamy sand
Bt - 14 to 65 inches: sandy clay loam
BC - 65 to 80 inches: sandy clay loam
Properties and qualities
Slope: 2 to 6 percent
Depth to restrictive feature: More than 80 inches
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Custom Soil Resource Report
Drainage class: Well drained
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 40 to 72 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity: Moderate (about 6.9 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 2e
Hydrologic Soil Group: A
Hydric soil rating: No
Minor Components
Wagram
Percent of map unit: 10 percent
Landform: Broad interstream divides on marine terraces, ridges on marine
terraces
Landform position (two-dimensional): Summit, shoulder
Landform position (three-dimensional): Riser, rise
Down -slope shape: Convex, linear
Across -slope shape: Convex
Hydric soil rating: No
Goldsboro
Percent of map unit: 7 percent
Landform: Broad interstream divides on marine terraces, flats on marine terraces
Landform position (three-dimensional): Talf
Down -slope shape: Linear
Across -slope shape: Linear
Hydric soil rating: No
NrB—Norfolk, Georgeville, and Faceville soils, 2 to 8 percent slopes
Map Unit Setting
National map unit symbol: 3gdz
Elevation: 80 to 330 feet
Mean annual precipitation: 38 to 55 inches
Mean annual air temperature: 59 to 70 degrees F
Frost -free period: 210 to 265 days
Farmland classification: All areas are prime farmland
Map Unit Composition
Norfolk and similar soils: 45 percent
Georgeville and similar soils: 25 percent
Faceville and similar soils: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
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Custom Soil Resource Report
Description of Norfolk
Setting
Landform: Broad interstream divides on marine terraces, ridges on marine
terraces
Landform position (two-dimensional): Shoulder, summit
Landform position (three-dimensional): Crest
Down -slope shape: Convex
Across -slope shape: Convex
Parent material: Loamy marine deposits
Typical profile
Ap - 0 to 9 inches: loamy sand
E - 9 to 14 inches: loamy sand
Bt - 14 to 70 inches: sandy clay loam
C - 70 to 100 inches: 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: 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 40 to 72 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity: Moderate (about 7.6 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 2e
Hydrologic Soil Group: A
Hydric soil rating: No
Description of Georgeville
Setting
Landform: Ridges
Down -slope shape: Convex
Across -slope shape: Convex
Parent material: Residuum weathered from metavolcanics and/or residuum
weathered from argillite
Typical profile
Ap - 0 to 8 inches: loam
Bt1 - 8 to 15 inches: clay loam
Bt2 - 15 to 45 inches: clay
BC - 45 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: 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 capacity. Moderate (about 8.5 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 2e
Hydrologic Soil Group: B
Hydric soil rating: No
Description of Faceville
Setting
Landform: Broad interstream divides on marine terraces, ridges on marine
terraces
Landform position (two-dimensional): Shoulder, summit
Landform position (three-dimensional): Crest
Down -slope shape: Convex
Across -slope shape: Convex
Parent material: Clayey marine deposits
Typical profile
Ap - 0 to 8 inches: fine sandy loam
E - 8 to 13 inches: fine sandy loam
Bt - 13 to 80 inches: 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 capacity. Moderate (about 8.1 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 2e
Hydrologic Soil Group: B
Hydric soil rating: No
RaA—Rains fine sandy loam, 0 to 2 percent slopes, Southern Coastal
Plain
Map Unit Setting
National map unit symbol: 2v75b
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Custom Soil Resource Report
Elevation: 30 to 330 feet
Mean annual precipitation: 40 to 55 inches
Mean annual air temperature: 59 to 70 degrees F
Frost -free period: 200 to 280 days
Farmland classification: Prime farmland if drained
Map Unit Composition
Rains, undrained, and similar soils: 70 percent
Rains, drained, and similar soils: 16 percent
Minor components: 14 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Rains, Undrained
Setting
Landform: Flats on marine terraces, carolina bays on marine terraces, broad
interstream divides on marine terraces
Landform position (three-dimensional): Dip, talf
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Loamy marine deposits
Typical profile
A - 0 to 8 inches: fine sandy loam
Eg - 8 to 13 inches: fine sandy loam
Btg - 13 to 72 inches: sandy clay loam
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Poorly drained
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 0 to 12 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity. High (about 9.7 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4w
Hydrologic Soil Group: B/D
Hydric soil rating: Yes
Description of Rains, Drained
Setting
Landform: Flats on marine terraces, carolina bays on marine terraces, broad
interstream divides on marine terraces
Landform position (three-dimensional): Dip, talf
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Loamy marine deposits
Typical profile
Ap - 0 to 8 inches: fine sandy loam
Eg - 8 to 13 inches: fine sandy loam
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Custom Soil Resource Report
Btg - 13 to 72 inches: sandy clay loam
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Poorly drained
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 24 to 36 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity. High (about 9.7 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3w
Hydrologic Soil Group: B/D
Hydric soil rating: Yes
Minor Components
Lynchburg
Percent of map unit: 8 percent
Landform: Broad interstream divides on marine terraces, flats on marine terraces
Landform position (three-dimensional): Talf
Down -slope shape: Linear
Across -slope shape: Linear
Hydric soil rating: No
Pantego, ponded
Percent of map unit: 6 percent
Landform: Flats, broad interstream divides
Landform position (three-dimensional): Talf
Down -slope shape: Linear
Across -slope shape: Concave
Hydric soil rating: Yes
Wh—Wehadkee loam, 0 to 2 percent slopes, frequently flooded
Map Unit Setting
National map unit symbol: 3gf9
Elevation: 200 to 1,400 feet
Mean annual precipitation: 37 to 60 inches
Mean annual air temperature: 59 to 66 degrees F
Frost -free period: 200 to 240 days
Farmland classification: Not prime farmland
Map Unit Composition
Wehadkee, undrained, and similar soils: 85 percent
Wehadkee, drained, and similar soils: 10 percent
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Custom Soil Resource Report
Minor components: 5 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Wehadkee, Undrained
Setting
Landform: Depressions on flood plains
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
Bg - 8 to 43 inches: sandy clay loam
Cg - 43 to 80 inches: sandy loam
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Poorly drained
Runoff class: Ponded
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 0 to 12 inches
Frequency of flooding: Frequent
Frequency of ponding: None
Available water capacity. High (about 9.9 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 6w
Hydrologic Soil Group: B/D
Hydric soil rating: Yes
Description of Wehadkee, Drained
Setting
Landform: Depressions on flood plains
Down -slope shape: Concave
Across -slope shape: Linear
Parent material: Loamy alluvium derived from igneous and metamorphic rock
Typical profile
Ap - 0 to 8 inches: loam
Bg - 8 to 43 inches: sandy clay loam
Cg - 43 to 80 inches: sandy loam
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Poorly drained
Runoff class: Ponded
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 0 to 12 inches
Frequency of flooding: Frequent
Frequency of ponding: None
Available water capacity. High (about 9.9 inches)
17

Custom Soil Resource Report
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4w
Hydrologic Soil Group: B/D
Hydric soil rating: Yes
Minor Components
Chewacla
Percent of map unit: 3 percent
Landform: Flood plains
Down -slope shape: Concave
Across -slope shape: Linear
Hydric soil rating: No
Riverview
Percent of map unit: 2 percent
Landform: Flood plains
Down -slope shape: Linear
Across -slope shape: Linear
Hydric soil rating: No
18

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
19

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
20

APPENDIX E
Skimmer/Sediment Basin Design Calculations

DC
EAST NASH SUBSTAION
civil
Design
C"" SOLAR ARRAY - SEDIMENT BASIN'C'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
A
Units
Basin Type
Basin
Maximum Drainage Area
100
acre
Drainage Area (DA)
11.86
acre
Disturbed Area
11.86
acre
Runoff Coefficient (C)
0.65
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
220
feet
Top of Water Width
105
feet
L/W Ratio
2.1:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
212
feet
Bottom of Basin Width
97
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
52.58
cfs
Minimum Volume
21,348
cu-ft
Volume Provided
43,664
cu-ft
Minimum Surface Area
22,870
sq-ft
Surface Area Provided
23,100
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
4.0
N/A
N/A
inch
Orifice Diameter
3.4
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
44x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DC
EAST NASH SUBSTAION
SOLAR ARRAY -SEDIMENT BASIN'D'
civil
CDesign
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
B 1
Units
Basin Type
Skimmer
Maximum Drainage Area
10
acre
Drainage Area (DA)
4.57
acre
Disturbed Area
4.57
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
115
feet
Top of Water Width
55
feet
L/W Ratio
2.1:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
107
feet
Bottom of Basin Width
47
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
18.70
cfs
Minimum Volume
8,226
cu-ft
Volume Provided
11,354
cu-ft
Minimum Surface Area
6,078
sq-ft
Surface Area Provided
6,325
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
2.5
N/A
N/A
inch
Orifice Diameter
1.9
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
32x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DC
EAST NASH SUBSTAION
SOLAR ARRAY -SEDIMENT BASIN'D'
civil
CDesign
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
B2
Units
Basin Type
Skimmer
Maximum Drainage Area
10
acre
Drainage Area (DA)
1.67
acre
Disturbed Area
1.67
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
75
feet
Top of Water Width
30
feet
L/W Ratio
2.5:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
67
feet
Bottom of Basin Width
22
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
6.83
cfs
Minimum Volume
3,006
cu-ft
Volume Provided
3,724
cu-ft
Minimum Surface Area
2,221
sq-ft
Surface Area Provided
2,250
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
1.5
N/A
N/A
inch
Orifice Diameter
1.3
N/A
N/A
inch
Does the basin have a spillway? No
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DCcivil
C""
EAST NASH SUBSTAION
SOLAR ARRAY - SEDIMENT BASIN'E'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
C
Units
Basin Type
Basin
Maximum Drainage Area
100
acre
Drainage Area (DA)
10.81
acre
Disturbed Area
10.81
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
290
feet
Top of Water Width
70
feet
L/W Ratio
4.1:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
282
feet
Bottom of Basin Width
62
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
44.23
cfs
Minimum Volume
19,458
cu-ft
Volume Provided
37,784
cu-ft
Minimum Surface Area
19,242
sq-ft
Surface Area Provided
20,300
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
4.0
N/A
N/A
inch
Orifice Diameter
3.2
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
44x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DCcivil
C""
EAST NASH SUBSTAION
SOLAR ARRAY - SEDIMENT BASIN'F'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
D
Units
Basin Type
Skimmer
Maximum Drainage Area
10
acre
Drainage Area (DA)
6.28
acre
Disturbed Area
6.28
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
160
feet
Top of Water Width
60
feet
L/W Ratio
2.7:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
152
feet
Bottom of Basin Width
52
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
25.70
cfs
Minimum Volume
11,304
cu-ft
Volume Provided
17,504
cu-ft
Minimum Surface Area
8,352
sq-ft
Surface Area Provided
9,600
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
2.5
N/A
N/A
inch
Orifice Diameter
2.4
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
20x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DC
EAST NASH SUBSTAION
QeMpn
C"" SOLAR ARRAY - SEDIMENT BASIN'G'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
E
Units
Basin Type
Skimmer
Maximum Drainage Area
10
acre
Drainage Area (DA)
8.68
acre
Disturbed Area
8.68
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
155
feet
Top of Water Width
75
feet
L/W Ratio
2.1:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
147
feet
Bottom of Basin Width
67
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
35.52
cfs
Minimum Volume
15,624
cu-ft
Volume Provided
21,474
cu-ft
Minimum Surface Area
11,544
sq-ft
Surface Area Provided
11,625
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
3.0
N/A
N/A
inch
Orifice Diameter
2.6
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
36x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DC
EAST NASH SUBSTAION
SOLAR ARRAY -SEDIMENT BASIN'H'
civil
CDesign
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
F
Units
Basin Type
Skimmer
Maximum Drainage Area
10
acre
Drainage Area (DA)
9.72
acre
Disturbed Area
9.72
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
165
feet
Top of Water Width
80
feet
L/W Ratio
2.1:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
157
feet
Bottom of Basin Width
72
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
39.77
cfs
Minimum Volume
17,496
cu-ft
Volume Provided
24,504
cu-ft
Minimum Surface Area
12,927
sq-ft
Surface Area Provided
13,200
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
3.0
N/A
N/A
inch
Orifice Diameter
2.7
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
40x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DCcivil
C""
EAST NASH SUBSTAION
SOLAR ARRAY - SEDIMENT BASIN T
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
G1
Units
Basin Type
Skimmer
Maximum Drainage Area
10
acre
Drainage Area (DA)
3.06
acre
Disturbed Area
3.06
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
100
feet
Top of Water Width
42
feet
L/W Ratio
2.4:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
92
feet
Bottom of Basin Width
34
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
12.52
cfs
Minimum Volume
5,508
cu-ft
Volume Provided
7,328
cu-ft
Minimum Surface Area
4,069
sq-ft
Surface Area Provided
4,200
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
2.0
N/A
N/A
inch
Orifice Diameter
1.7
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
16x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DCcivil
C""
EAST NASH SUBSTAION
SOLAR ARRAY - SEDIMENT BASIN T
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
G2
Units
Basin Type
Skimmer
Maximum Drainage Area
10
acre
Drainage Area (DA)
7.38
acre
Disturbed Area
7.38
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
155
feet
Top of Water Width
70
feet
L/W Ratio
2.2:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
147
feet
Bottom of Basin Width
62
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
30.20
cfs
Minimum Volume
13,284
cu-ft
Volume Provided
19,964
cu-ft
Minimum Surface Area
9,815
sq-ft
Surface Area Provided
10,850
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
3.0
N/A
N/A
inch
Orifice Diameter
2.5
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
32x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DCcivil
C""
EAST NASH SUBSTAION
SOLAR ARRAY - SEDIMENT BASIN'J'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
H
Units
Basin Type
Skimmer
Maximum Drainage Area
10
acre
Drainage Area (DA)
8.10
acre
Disturbed Area
8.10
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
170
feet
Top of Water Width
65
feet
L/W Ratio
2.6:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
162
feet
Bottom of Basin Width
57
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
33.15
cfs
Minimum Volume
14,580
cu-ft
Volume Provided
20,284
cu-ft
Minimum Surface Area
10,772
sq-ft
Surface Area Provided
11,050
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
3.0
N/A
N/A
inch
Orifice Diameter
2.5
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
36x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DC
EAST NASH SUBSTAION
SOLAR ARRAY -SEDIMENT BASIN'K'
civil
CDesign
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
I
Units
Basin Type
Basin
Maximum Drainage Area
100
acre
Drainage Area (DA)
11.25
acre
Disturbed Area
11.25
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
205
feet
Top of Water Width
100
feet
L/W Ratio
2.1:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
197
feet
Bottom of Basin Width
92
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
46.04
cfs
Minimum Volume
20,250
cu-ft
Volume Provided
38,624
cu-ft
Minimum Surface Area
20,025
sq-ft
Surface Area Provided
20,500
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
4.0
N/A
N/A
inch
Orifice Diameter
3.2
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
44x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DCcivil
C""
EAST NASH SUBSTAION
SOLAR ARRAY - SEDIMENT BASIN'L'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
J
Units
Basin Type
Basin
Maximum Drainage Area
100
acre
Drainage Area (DA)
15.54
acre
Disturbed Area
15.54
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
300
feet
Top of Water Width
93
feet
L/W Ratio
3.2:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
292
feet
Bottom of Basin Width
85
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
63.59
cfs
Minimum Volume
27,972
cu-ft
Volume Provided
52,720
cu-ft
Minimum Surface Area
27,662
sq-ft
Surface Area Provided
27,900
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
4.0
N/A
N/A
inch
Orifice Diameter
3.7
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
52x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DC
EAST NASH SUBSTAION
civil
Design
C"" SOLAR ARRAY - SEDIMENT BASIN'M'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
K
Units
Basin Type
Basin
Maximum Drainage Area
100
acre
Drainage Area (DA)
12.08
acre
Disturbed Area
12.08
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
220
feet
Top of Water Width
100
feet
L/W Ratio
2.2:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
212
feet
Bottom of Basin Width
92
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
49.43
cfs
Minimum Volume
21,744
cu-ft
Volume Provided
41,504
cu-ft
Minimum Surface Area
21,503
sq-ft
Surface Area Provided
22,000
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
4.0
N/A
N/A
inch
Orifice Diameter
3.3
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
44x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DC
EAST NASH SUBSTAION
civil
Design
C"" SOLAR ARRAY - SEDIMENT BASIN'N'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
L
Units
Basin Type
Skimmer
Maximum Drainage Area
10
acre
Drainage Area (DA)
8.54
acre
Disturbed Area
8.54
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
160
feet
Top of Water Width
75
feet
L/W Ratio
2.1:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
152
feet
Bottom of Basin Width
67
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
34.95
cfs
Minimum Volume
15,372
cu-ft
Volume Provided
22,184
cu-ft
Minimum Surface Area
11,357
sq-ft
Surface Area Provided
12,000
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
3.0
N/A
N/A
inch
Orifice Diameter
2.6
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
36x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DCcivil
Design
C""
EAST NASH SUBSTATION
SOLAR ARRAY-SED BASIN'O'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
M
Units
Basin Type
Basin
Maximum Drainage Area
100
acre
Drainage Area (DA)
21.32
acre
Disturbed Area
21.32
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
380
feet
Top of Water Width
100
feet
L/W Ratio
3.8:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
372
feet
Bottom of Basin Width
92
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
87.24
cfs
Minimum Volume
38,376
cu-ft
Volume Provided
72,224
cu-ft
Minimum Surface Area
37,950
sq-ft
Surface Area Provided
38,000
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
5.0
N/A
N/A
inch
Orifice Diameter
4.3
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Bottom Width
56x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DCcivil
C""
EAST NASH SUBSTATION
SOLAR ARRAY-SED BASIN 'P'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
N
Units
Basin Type
Basin
Maximum Drainage Area
100
acre
Drainage Area (DA)
14.96
acre
Disturbed Area
14.96
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
320
feet
Top of Water Width
85
feet
L/W Ratio
3.8:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
312
feet
Bottom of Basin Width
77
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
61.22
cfs
Minimum Volume
26,928
cu-ft
Volume Provided
51,224
cu-ft
Minimum Surface Area
26,629
sq-ft
Surface Area Provided
27,200
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
4.0
N/A
N/A
inch
Orifice Diameter
3.7
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
52x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DCcivil
C""
EAST NASH SUBSTATION
SOLAR ARRAY-SED BASIN'Q'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
O
Units
Basin Type
Skimmer
Maximum Drainage Area
10
acre
Drainage Area (DA)
8.53
acre
Disturbed Area
8.53
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
160
feet
Top of Water Width
75
feet
L/W Ratio
2.1:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
152
feet
Bottom of Basin Width
67
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
34.90
cfs
Minimum Volume
15,354
cu-ft
Volume Provided
22,184
cu-ft
Minimum Surface Area
11,344
sq-ft
Surface Area Provided
12,000
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
3.0
N/A
N/A
inch
Orifice Diameter
2.6
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
36x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DCcivil
C""
EAST NASH SUBSTATION
SOLAR ARRAY-SED BASIN'R'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
P
Units
Basin Type
Basin
Maximum Drainage Area
100
acre
Drainage Area (DA)
12.29
acre
Disturbed Area
12.29
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
220
feet
Top of Water Width
100
feet
L/W Ratio
2.2:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
212
feet
Bottom of Basin Width
92
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
50.29
cfs
Minimum Volume
22,122
cu-ft
Volume Provided
41,504
cu-ft
Minimum Surface Area
21,876
sq-ft
Surface Area Provided
22,000
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
4.0
N/A
N/A
inch
Orifice Diameter
3.3
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
44x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

DCcivil
C""
EAST NASH SUBSTATION
SOLAR ARRAY-SED BASIN'S'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
Q
Units
Basin Type
Skimmer
Maximum Drainage Area
10
acre
Drainage Area (DA)
5.05
acre
Disturbed Area
5.05
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
125
feet
Top of Water Width
55
feet
L/W Ratio
2.3:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
117
feet
Bottom of Basin Width
47
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
20.66
cfs
Minimum Volume
9,090
cu-ft
Volume Provided
12,374
cu-ft
Minimum Surface Area
6,716
sq-ft
Surface Area Provided
6,875
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
2.5
N/A
N/A
inch
Orifice Diameter
2.0
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
24x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
T 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

GI-JurNR
EAST NASH SUBSTATION
SOLAR ARRAY-SED BASIN'T'
CDC Project No.: 12139
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
R
Units
Basin Type
Skimmer
Maximum Drainage Area
10
acre
Drainage Area (DA)
3.95
acre
Disturbed Area
3.95
acre
Runoff Coefficient (C)
0.6
Rainfall Intensity (I10)
6.82
in/hr
Top of Water Length
115
feet
Top of Water Width
50
feet
L/W Ratio
2.3:1
feet
Water Depth
2.00
feet
Side Slope Ratio
2.00
X:1
Bottom of Basin Length
107
feet
Bottom of Basin Width
42
feet
SURFACE AREA & VOLUME
Runoff (10 Year Event)
16.16
cfs
Minimum Volume
7,110
cu-ft
Volume Provided
10,244
cu-ft
Minimum Surface Area
5,253
sq-ft
Surface Area Provided
5,750
sq-ft
SKIMMER SIZE
Drawdown Time
3
days
Skimmer Size
2.5
N/A
N/A
inch
Orifice Diameter
1.9
N/A
N/A
inch
Does the basin have a spillway? Yes
SPILLWAY SIZE
Spillway Dimensions
16x1.5'
feet
Water Depth
0.50
feet
Free -Board
1.00
feet
NCDENR E&SC Manual (Ch 6.6)
Weighted Coefficient
at TC
2:1 Min, 6:1 Max
Train 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 8.07d "Design Table for Vegetated Spillways Excavated in Very Erodible Soils" 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 11/10/2021

APPENDIX F
Channel Protection

11/16/21, 3:17 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>Al
Name
Al
Discharge
20.69
Channel Slope
0.0164
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
Sandy Loam (GM)
SC250
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 Remarks Staple
Phase Reach Discharge Velocity Depth Mannings N Shear Stress Shear Stress Factor Pattern
SC250
Straight
20.69 cfs
4.12 ft/s
1.16 ft
0.036
3 Ibs/ft2
1.19 Ibs/ft2
2.52
STABLE E
Unvegetated
Underlying
Straight
20.69 cfs
4.12 ft/s
1.16 ft
0.036
2.84 Ibs/ft2
0.71 Ibs/ft2
3.98
STABLE E
Substrate
SC250
Straight
20.69 cfs
3.21 ft/s
1.36 ft
0.051
10 Ibs/ft2
1.4 Ibs/ft2
7.17
STABLE E
Reinforced
Vegetation
Underlying
Straight
20.69 cfs
3.21 ft/s
1.36 ft
0.051
6.74 Ibs/ft2
0.81 Ibs/ft2
8.28
STABLE E
Substrate
https://ecmds.com/project/150063/channel-analysis/213165/show 1/1

11/16/21, 3:13 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>A2
Name
A2
Discharge
8.42
Channel Slope
0.0378
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
Sandy Loam (GM)
SC250
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 Remarks Staple
Phase Reach Discharge Velocity Depth Mannings N Shear Stress Shear Stress Factor Pattern
SC250
Straight
8.42 cfs
4.56 ft/s
0.58 ft
0.034
3 Ibs/ft2
1.37 Ibs/ft2
2.18
STABLE E
Unvegetated
Underlying
Straight
8.42 cfs
4.56 ft/s
0.58 ft
0.034
2.84 Ibs/ft2
0.94 Ibs/ft2
3.01
STABLE E
Substrate
SC250
Straight
8.42 cfs
3.72 ft/s
0.68 ft
0.046
10 Ibs/ft2
1.59 Ibs/ft2
6.27
STABLE E
Reinforced
Vegetation
Underlying
Straight
8.42 cfs
3.72 ft/s
0.68 ft
0.046
5.44 Ibs/ft2
1.06 Ibs/ft2
5.12
STABLE E
Substrate
https://ecmds.com/project/150063/channel-analysis/214264/show 1/1

11/8/21, 4:23 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
»>B1
Name
B1
Discharge
11.59
Channel Slope
0.0092
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
11.59 cfs
2.6 ft/s
1.07 ft
0.041
3 Ibs/ft2
0.62 Ibs/ft2
4.87
STABLE E
Unvegetated
Underlying
Straight
11.59 cfs
2.6 ft/s
1.07 ft
0.041
2.84 Ibs/ft2
0.38 Ibs/ft2
7.56
STABLE E
Substrate
SC250
Straight
11.59 cfs
1.87 ft/s
1.33 ft
0.065
10 Ibs/ft2
0.76 Ibs/ft2
13.1
STABLE E
Reinforced
Vegetation
Underlying
Straight
11.59 cfs
1.87 ft/s
1.33 ft
0.065
10 Ibs/ft2
0.45 Ibs/ft2
22.34
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213167/show 1 /1

11/8/21, 4:23 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>B2
Name
B2
Discharge
3.59
Channel Slope
0.0231
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
3.59 cfs
2.72 ft/s
0.45 ft
0.039
3 Ibs/ft2
0.65 Ibs/ft2
4.59
STABLE E
Unvegetated
Underlying
Straight
3.59 cfs
2.72 ft/s
0.45 ft
0.039
2.84 Ibs/ft2
0.47 Ibs/ft2
6.02
STABLE E
Substrate
SC250
Straight
3.59 cfs
2.04 ft/s
0.56 ft
0.059
10 Ibs/ft2
0.81 Ibs/ft2
12.33
STABLE E
Reinforced
Vegetation
Underlying
Straight
3.59 cfs
2.04 ft/s
0.56 ft
0.059
9.08 Ibs/ft2
0.56 Ibs/ft2
16.17
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213170/show 1 /1

11/8/21, 4:24 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>B3
Name
B3
Discharge
1.51
Channel Slope
0.0152
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
1.51 cfs
1.66 ft/s
0.34 ft
0.045
3 Ibs/ft2
0.32 Ibs/ft2
9.32
STABLE E
Unvegetated
Underlying
Straight
1.51 cfs
1.66 ft/s
0.34 ft
0.045
2.84 Ibs/ft2
0.25 Ibs/ft2
11.59
STABLE E
Substrate
SC250
Straight
1.51 cfs
1.16 ft/s
0.45 ft
0.075
10 Ibs/ft2
0.43 Ibs/ft2
23.43
STABLE E
Reinforced
Vegetation
Underlying
Straight
1.51 cfs
1.16 ft/s
0.45 ft
0.075
10 Ibs/ft2
0.31 Ibs/ft2
32.41
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213171/show 1/1

11/8/21, 4:24 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>C1
Name
C1
Discharge
13.31
Channel Slope
0.0189
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
13.31 cfs
3.83 ft/s
0.91 ft
0.037
3 Ibs/ft2
1.07 Ibs/ft2
2.8
STABLE E
Unvegetated
Underlying
Straight
13.31 cfs
3.83 ft/s
0.91 ft
0.037
2.84 Ibs/ft2
0.67 Ibs/ft2
4.21
STABLE E
Substrate
SC250
Straight
13.31 cfs
2.97 ft/s
1.08 ft
0.052
10 Ibs/ft2
1.27 Ibs/ft2
7.88
STABLE E
Reinforced
Vegetation
Underlying
Straight
13.31 cfs
2.97 ft/s
1.08 ft
0.052
7.02 Ibs/ft2
0.77 Ibs/ft2
9.08
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213172/show 1 /1

11/8/21, 4:24 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>C2
Name
C2
Discharge
9.86
Channel Slope
0.0312
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
9.86 cfs
4.4 ft/s
0.67 ft
0.035
3 Ibs/ft2
1.3 Ibs/ft2
2.3
STABLE E
Unvegetated
Underlying
Straight
9.86 cfs
4.4 ft/s
0.67 ft
0.035
2.84 Ibs/ft2
0.87 Ibs/ft2
3.26
STABLE E
Substrate
SC250
Straight
9.86 cfs
3.54 ft/s
0.78 ft
0.047
10 Ibs/ft2
1.52 Ibs/ft2
6.57
STABLE E
Reinforced
Vegetation
Underlying
Straight
9.86 cfs
3.54 ft/s
0.78 ft
0.047
5.78 Ibs/ft2
0.99 Ibs/ft2
5.86
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213173/show 1 /1

11/8/21, 4:24 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>D
Name
D
Discharge
13.73
Channel Slope
0.0108
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
13.73 cfs
2.96 ft/s
1.1 ft
0.04
3 Ibs/ft2
0.74 Ibs/ft2
4.04
STABLE E
Unvegetated
Underlying
Straight
13.73 cfs
2.96 ft/s
1.1 ft
0.04
2.84 Ibs/ft2
0.45 Ibs/ft2
6.31
STABLE E
Substrate
SC250
Straight
13.73 cfs
2.18 ft/s
1.34 ft
0.06
10 Ibs/ft2
0.91 Ibs/ft2
11.04
STABLE E
Reinforced
Vegetation
Underlying
Straight
13.73 cfs
2.18 ft/s
1.34 ft
0.06
9.5 Ibs/ft2
0.53 Ibs/ft2
17.93
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213174/show 1 /1

11/8/21, 4:24 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>> E1
Name
E1
Discharge
12.72
Channel Slope
0.0148
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
12.72 cfs
3.36 ft/s
0.96 ft
0.038
3 Ibs/ft2
0.89 Ibs/ft2
3.37
STABLE E
Unvegetated
Underlying
Straight
12.72 cfs
3.36 ft/s
0.96 ft
0.038
2.84 Ibs/ft2
0.55 Ibs/ft2
5.13
STABLE E
Substrate
SC250
Straight
12.72 cfs
2.54 ft/s
1.16 ft
0.056
10 Ibs/ft2
1.07 Ibs/ft2
9.34
STABLE E
Reinforced
Vegetation
Underlying
Straight
12.72 cfs
2.54 ft/s
1.16 ft
0.056
8.14 Ibs/ft2
0.64 Ibs/ft2
12.64
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213175/show 1 /1

11/8/21, 4:23 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>> > E2
Name
E2
Discharge
6.23
Channel Slope
0.0427
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
6.23 cfs
4.36 ft/s
0.48 ft
0.035
3 Ibs/ft2
1.28 Ibs/ft2
2.34
STABLE E
Unvegetated
Underlying
Straight
6.23 cfs
4.36 ft/s
0.48 ft
0.035
2.84 Ibs/ft2
0.92 Ibs/ft2
3.1
STABLE E
Substrate
SC250
Straight
6.23 cfs
3.54 ft/s
0.56 ft
0.046
10 Ibs/ft2
1.5 Ibs/ft2
6.67
STABLE E
Reinforced
Vegetation
Underlying
Straight
6.23 cfs
3.54 ft/s
0.56 ft
0.046
5.55 Ibs/ft2
1.04 Ibs/ft2
5.35
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213176/show 1 /1

11/8/21, 4:24 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>> > F1
Name
F1
Discharge
14.48
Channel Slope
0.0072
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
14.48 cfs
2.48 ft/s
1.28 ft
0.042
3 Ibs/ft2
0.57 Ibs/ft2
5.22
STABLE E
Unvegetated
Underlying
Straight
14.48 cfs
2.48 ft/s
1.28 ft
0.042
2.84 Ibs/ft2
0.34 Ibs/ft2
8.37
STABLE E
Substrate
SC250
Straight
14.48 cfs
1.76 ft/s
1.59 ft
0.067
10 Ibs/ft2
0.71 Ibs/ft2
13.99
STABLE E
Reinforced
Vegetation
Underlying
Straight
14.48 cfs
1.76 ft/s
1.59 ft
0.067
10 Ibs/ft2
0.41 Ibs/ft2
24.61
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213177/show 1 /1

11/8/21, 4:24 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>> > F2
Name
F2
Discharge
2.36
Channel Slope
0.0059
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
2.36 cfs
1.26 ft/s
0.59 ft
0.05
3 Ibs/ft2
0.22 Ibs/ft2
13.82
STABLE E
Unvegetated
Underlying
Straight
2.36 cfs
1.26 ft/s
0.59 ft
0.05
2.84 Ibs/ft2
0.15 Ibs/ft2
19.09
STABLE E
Substrate
SC250
Straight
2.36 cfs
0.81 ft/s
0.81 ft
0.091
10 Ibs/ft2
0.3 Ibs/ft2
33.74
STABLE E
Reinforced
Vegetation
Underlying
Straight
2.36 cfs
0.81 ft/s
0.81 ft
0.091
10 Ibs/ft2
0.19 Ibs/ft2
52.34
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213178/show 1 /1

11/8/21, 4:24 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
»>G1
Name
G1
Discharge
1.42
Channel Slope
0.0253
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
1.42 cfs
2.03 ft/s
0.27 ft
0.042
3 Ibs/ft2
0.43 Ibs/ft2
6.93
STABLE E
Unvegetated
Underlying
Straight
1.42 cfs
2.03 ft/s
0.27 ft
0.042
2.84 Ibs/ft2
0.34 Ibs/ft2
8.3
STABLE E
Substrate
SC250
Straight
1.42 cfs
1.48 ft/s
0.35 ft
0.066
10 Ibs/ft2
0.56 Ibs/ft2
17.91
STABLE E
Reinforced
Vegetation
Underlying
Straight
1.42 cfs
1.48 ft/s
0.35 ft
0.066
10 Ibs/ft2
0.42 Ibs/ft2
23.69
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213179/show 1 /1

11/8/21, 4:25 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>G2
Name
G2
Discharge
2.2
Channel Slope
0.0453
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
2.2 cfs
3.08 ft/s
0.28 ft
0.037
3 Ibs/ft2
0.79 Ibs/ft2
3.81
STABLE E
Unvegetated
Underlying
Straight
2.2 cfs
3.08 ft/s
0.28 ft
0.037
2.84 Ibs/ft2
0.62 Ibs/ft2
4.58
STABLE E
Substrate
SC250
Straight
2.2 cfs
2.42 ft/s
0.34 ft
0.053
10 Ibs/ft2
0.96 Ibs/ft2
10.42
STABLE E
Reinforced
Vegetation
Underlying
Straight
2.2 cfs
2.42 ft/s
0.34 ft
0.053
7.35 Ibs/ft2
0.73 Ibs/ft2
10.06
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213180/show 1 /1

11/8/21, 4:25 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>> H1
Name
H1
Discharge
10.16
Channel Slope
0.0206
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
10.16 cfs
3.66 ft/s
0.78 ft
0.037
3 Ibs/ft2
1 Ibs/ft2
2.99
STABLE E
Unvegetated
Underlying
Straight
10.16 cfs
3.66 ft/s
0.78 ft
0.037
2.84 Ibs/ft2
0.65 Ibs/ft2
4.37
STABLE E
Substrate
SC250
Straight
10.16 cfs
2.83 ft/s
0.93 ft
0.053
10 Ibs/ft2
1.19 Ibs/ft2
8.37
STABLE E
Reinforced
Vegetation
Underlying
Straight
10.16 cfs
2.83 ft/s
0.93 ft
0.053
7.21 Ibs/ft2
0.75 Ibs/ft2
9.63
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213181/show 1/1

11/8/21, 4:25 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>> > H2
Name
H2
Discharge
3.78
Channel Slope
0.0421
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
3.78 cfs
3.63 ft/s
0.38 ft
0.036
3 Ibs/ft2
0.99 Ibs/ft2
3.03
STABLE E
Unvegetated
Underlying
Straight
3.78 cfs
3.63 ft/s
0.38 ft
0.036
2.84 Ibs/ft2
0.74 Ibs/ft2
3.84
STABLE E
Substrate
SC250
Straight
3.78 cfs
2.89 ft/s
0.45 ft
0.05
10 Ibs/ft2
1.18 Ibs/ft2
8.45
STABLE E
Reinforced
Vegetation
Underlying
Straight
3.78 cfs
2.89 ft/s
0.45 ft
0.05
6.48 Ibs/ft2
0.85 Ibs/ft2
7.58
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213182/show 1 /1

11/8/21, 4:25 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>> 11
Name
11
Discharge
0.69
Channel Slope
0.0584
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
0.69 cfs
2.18 ft/s
0.14 ft
0.04
3 Ibs/ft2
0.5 Ibs/ft2
5.96
STABLE E
Unvegetated
Underlying
Straight
0.69 cfs
2.18 ft/s
0.14 ft
0.04
2.84 Ibs/ft2
0.44 Ibs/ft2
6.49
STABLE E
Substrate
SC250
Straight
0.69 cfs
1.68 ft/s
0.18 ft
0.06
10 Ibs/ft2
0.64 Ibs/ft2
15.64
STABLE E
Reinforced
Vegetation
Underlying
Straight
0.69 cfs
1.68 ft/s
0.18 ft
0.06
9.36 Ibs/ft2
0.54 Ibs/ft2
17.35
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213183/show 1 /1

11/8/21, 4:24 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>12
Name
12
Discharge
13.97
Channel Slope
0.0147
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
13.97 cfs
3.45 ft/s
1.01 ft
0.038
3 Ibs/ft2
0.92 Ibs/ft2
3.25
STABLE E
Unvegetated
Underlying
Straight
13.97 cfs
3.45 ft/s
1.01 ft
0.038
2.84 Ibs/ft2
0.57 Ibs/ft2
4.98
STABLE E
Substrate
SC250
Straight
13.97 cfs
2.62 ft/s
1.21 ft
0.055
10 Ibs/ft2
1.11 Ibs/ft2
9.03
STABLE E
Reinforced
Vegetation
Underlying
Straight
13.97 cfs
2.62 ft/s
1.21 ft
0.055
7.97 Ibs/ft2
0.66 Ibs/ft2
12.06
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213184/show 1 /1

11/8/21, 4:23 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>J1
Name
J1
Discharge
2.01
Channel Slope
0.0337
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
2.01 cfs
2.62 ft/s
0.3 ft
0.039
3 Ibs/ft2
0.62 Ibs/ft2
4.82
STABLE E
Unvegetated
Underlying
Straight
2.01 cfs
2.62 ft/s
0.3 ft
0.039
2.84 Ibs/ft2
0.49 Ibs/ft2
5.85
STABLE E
Substrate
SC250
Straight
2.01 cfs
1.99 ft/s
0.37 ft
0.058
10 Ibs/ft2
0.78 Ibs/ft2
12.9
STABLE E
Reinforced
Vegetation
Underlying
Straight
2.01 cfs
1.99 ft/s
0.37 ft
0.058
8.82 Ibs/ft2
0.58 Ibs/ft2
15.17
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213185/show 1 /1

11/8/21, 4:20 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>J2
Name
J2
Discharge
1.93
Channel Slope
0.0232
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
1.93 cfs
2.19 ft/s
0.33 ft
0.041
3 Ibs/ft2
0.48 Ibs/ft2
6.26
STABLE E
Unvegetated
Underlying
Straight
1.93 cfs
2.19 ft/s
0.33 ft
0.041
2.84 Ibs/ft2
0.37 Ibs/ft2
7.75
STABLE E
Substrate
SC250
Straight
1.93 cfs
1.6 ft/s
0.42 ft
0.065
10 Ibs/ft2
0.61 Ibs/ft2
16.33
STABLE E
Reinforced
Vegetation
Underlying
Straight
1.93 cfs
1.6 ft/s
0.42 ft
0.065
10 Ibs/ft2
0.45 Ibs/ft2
22.33
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213186/show 1 /1

11/8/21, 4:23 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>K1
Name
K1
Discharge
6.59
Channel Slope
0.0074
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
6.59 cfs
1.96 ft/s
0.89 ft
0.044
3 Ibs/ft2
0.41 Ibs/ft2
7.31
STABLE E
Unvegetated
Underlying
Straight
6.59 cfs
1.96 ft/s
0.89 ft
0.044
2.84 Ibs/ft2
0.26 Ibs/ft2
10.94
STABLE E
Substrate
SC250
Straight
6.59 cfs
1.35 ft/s
1.14 ft
0.074
10 Ibs/ft2
0.53 Ibs/ft2
18.95
STABLE E
Reinforced
Vegetation
Underlying
Straight
6.59 cfs
1.35 ft/s
1.14 ft
0.074
10 Ibs/ft2
0.32 Ibs/ft2
31.44
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213187/show 1 /1

11/8/21, 4:23 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>K2
Name
K2
Discharge
2.13
Channel Slope
0.0255
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 Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
Underlying
Straight
2.13 cfs
1.75 ft/s
0.43 ft
0.062
10 Ibs/ft2
0.49 Ibs/ft2
20.21
STABLE E
Substrate
SC250
Straight
2.13 cfs
2.36 ft/s
0.34 ft
0.041
3 Ibs/ft2
0.54 Ibs/ft2
5.6
STABLE E
Unvegetated
Underlying
Straight
2.13 cfs
2.36 ft/s
0.34 ft
0.041
2.84 Ibs/ft2
0.41 Ibs/ft2
6.95
STABLE E
Substrate
SC250
Straight
2.13 cfs
1.75 ft/s
0.43 ft
0.062
10 Ibs/ft2
0.68 Ibs/ft2
14.76
STABLE E
Reinforced
Vegetation
https://ecmds.com/project/l50063/channel-analysis/213188/show 1 /1

11/8/21, 4:23 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
— 1-1
Name
L1
Discharge
13.65
Channel Slope
0.0133
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
13.65 cfs
3.27 ft/s
1.03 ft
0.039
3 Ibs/ft2
0.85 Ibs/ft2
3.52
STABLE E
Unvegetated
Underlying
Straight
13.65 cfs
3.27 ft/s
1.03 ft
0.039
2.84 Ibs/ft2
0.52 Ibs/ft2
5.41
STABLE E
Substrate
SC250
Straight
13.65 cfs
2.45 ft/s
1.24 ft
0.057
10 Ibs/ft2
1.03 Ibs/ft2
9.7
STABLE E
Reinforced
Vegetation
Underlying
Straight
13.65 cfs
2.45 ft/s
1.24 ft
0.057
8.47 Ibs/ft2
0.61 Ibs/ft2
13.84
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213189/show 1 /1

11/8/21, 4:22 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>L2
Name
L2
Discharge
6.93
Channel Slope
0.0516
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
6.93 cfs
4.93 ft/s
0.48 ft
0.033
3 Ibs/ft2
1.53 Ibs/ft2
1.96
STABLE E
Unvegetated
Underlying
Straight
6.93 cfs
4.93 ft/s
0.48 ft
0.033
2.84 Ibs/ft2
1.1 Ibs/ft2
2.59
STABLE E
Substrate
SC250
Straight
6.93 cfs
4.1 ft/s
0.55 ft
0.043
10 Ibs/ft2
1.76 Ibs/ft2
5.68
STABLE E
Reinforced
Vegetation
Underlying
Straight
6.93 cfs
4.1 ft/s
0.55 ft
0.043
4.86 Ibs/ft2
1.22 Ibs/ft2
3.97
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213190/show 1 /1

11/8/21, 4:25 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>M1
Name
M1
Discharge
10.54
Channel Slope
0.0412
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
10.54 cfs
5.12 ft/s
0.63 ft
0.033
3 Ibs/ft2
1.62 Ibs/ft2
1.85
STABLE E
Unvegetated
Underlying
Straight
10.54 cfs
5.12 ft/s
0.63 ft
0.033
2.84 Ibs/ft2
1.1 Ibs/ft2
2.59
STABLE E
Substrate
SC250
Straight
10.54 cfs
4.25 ft/s
0.72 ft
0.043
10 Ibs/ft2
1.85 Ibs/ft2
5.39
STABLE E
Reinforced
Vegetation
Underlying
Straight
10.54 cfs
4.25 ft/s
0.72 ft
0.043
4.87 Ibs/ft2
1.22 Ibs/ft2
3.99
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213502/show 1 /1

11/8/21, 4:22 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
»>N1
Name
N1
Discharge
5.47
Channel Slope
0.0125
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
5.47 cfs
2.36 ft/s
0.69 ft
0.042
3 Ibs/ft2
0.54 Ibs/ft2
5.61
STABLE E
Unvegetated
Underlying
Straight
5.47 cfs
2.36 ft/s
0.69 ft
0.042
2.84 Ibs/ft2
0.36 Ibs/ft2
7.98
STABLE E
Substrate
SC250
Straight
5.47 cfs
1.7 ft/s
0.86 ft
0.066
10 Ibs/ft2
0.67 Ibs/ft2
14.83
STABLE E
Reinforced
Vegetation
Underlying
Straight
5.47 cfs
1.7 ft/s
0.86 ft
0.066
10 Ibs/ft2
0.43 Ibs/ft2
23.33
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213191/show 1/1

11/8/21, 4:22 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>N2
Name
N2
Discharge
1.51
Channel Slope
0.0163
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
1.51 cfs
1.71 ft/s
0.33 ft
0.044
3 Ibs/ft2
0.34 Ibs/ft2
8.89
STABLE E
Unvegetated
Underlying
Straight
1.51 cfs
1.71 ft/s
0.33 ft
0.044
2.84 Ibs/ft2
0.26 Ibs/ft2
11.01
STABLE E
Substrate
SC250
Straight
1.51 cfs
1.2 ft/s
0.44 ft
0.074
10 Ibs/ft2
0.44 Ibs/ft2
22.47
STABLE E
Reinforced
Vegetation
Underlying
Straight
1.51 cfs
1.2 ft/s
0.44 ft
0.074
10 Ibs/ft2
0.32 Ibs/ft2
30.93
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213192/show 1 /1

11/8/21, 4:22 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>01
Name
01
Discharge
3.47
Channel Slope
0.0102
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
3.47 cfs
1.85 ft/s
0.59 ft
0.044
3 Ibs/ft2
0.38 Ibs/ft2
7.98
STABLE E
Unvegetated
Underlying
Straight
3.47 cfs
1.85 ft/s
0.59 ft
0.044
2.84 Ibs/ft2
0.26 Ibs/ft2
11.03
STABLE E
Substrate
SC250
Straight
3.47 cfs
1.28 ft/s
0.77 ft
0.074
10 Ibs/ft2
0.49 Ibs/ft2
20.46
STABLE E
Reinforced
Vegetation
Underlying
Straight
3.47 cfs
1.28 ft/s
0.77 ft
0.074
10 Ibs/ft2
0.32 Ibs/ft2
31.44
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213193/show 1 /1

11/8/21, 4:22 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>02
Name
02
Discharge
4.8
Channel Slope
0.0247
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
4.8 cfs
3.1 ft/s
0.51 ft
0.038
3 Ibs/ft2
0.79 Ibs/ft2
3.8
STABLE E
Unvegetated
Underlying
Straight
4.8 cfs
3.1 ft/s
0.51 ft
0.038
2.84 Ibs/ft2
0.56 Ibs/ft2
5.11
STABLE E
Substrate
SC250
Straight
4.8 cfs
2.37 ft/s
0.62 ft
0.056
10 Ibs/ft2
0.96 Ibs/ft2
10.4
STABLE E
Reinforced
Vegetation
Underlying
Straight
4.8 cfs
2.37 ft/s
0.62 ft
0.056
8.05 Ibs/ft2
0.65 Ibs/ft2
12.35
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213194/show 1 /1

11/8/21, 4:22 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>P1
Name
P1
Discharge
1.21
Channel Slope
0.0158
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
1.21 cfs
1.55 ft/s
0.3 ft
0.045
3 Ibs/ft2
0.3 Ibs/ft2
10.17
STABLE E
Unvegetated
Underlying
Straight
1.21 cfs
1.55 ft/s
0.3 ft
0.045
2.84 Ibs/ft2
0.23 Ibs/ft2
12.37
STABLE E
Substrate
SC250
Straight
1.21 cfs
1.08 ft/s
0.4 ft
0.077
10 Ibs/ft2
0.39 Ibs/ft2
25.36
STABLE E
Reinforced
Vegetation
Underlying
Straight
1.21 cfs
1.08 ft/s
0.4 ft
0.077
10 Ibs/ft2
0.29 Ibs/ft2
34.32
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213195/show 1 /1

11/8/21, 4:22 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>P2
Name
P2
Discharge
21.42
Channel Slope
0.0119
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
21.42 cfs
3.57 ft/s
1.3 ft
0.038
3 Ibs/ft2
0.97 Ibs/ft2
3.1
STABLE E
Unvegetated
Underlying
Straight
21.42 cfs
3.57 ft/s
1.3 ft
0.038
2.84 Ibs/ft2
0.57 Ibs/ft2
4.99
STABLE E
Substrate
SC250
Straight
21.42 cfs
2.7 ft/s
1.55 ft
0.055
10 Ibs/ft2
1.15 Ibs/ft2
8.67
STABLE E
Reinforced
Vegetation
Underlying
Straight
21.42 cfs
2.7 ft/s
1.55 ft
0.055
7.99 Ibs/ft2
0.66 Ibs/ft2
12.13
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213196/show 1 /1

11/8/21, 4:21 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>Q1
Name
Q1
Discharge
2.19
Channel Slope
0.01
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
2.19 cfs
1.56 ft/s
0.47 ft
0.046
3 Ibs/ft2
0.3 Ibs/ft2
10.13
STABLE E
Unvegetated
Underlying
Straight
2.19 cfs
1.56 ft/s
0.47 ft
0.046
2.84 Ibs/ft2
0.21 Ibs/ft2
13.41
STABLE E
Substrate
SC250
Straight
2.19 cfs
1.06 ft/s
0.63 ft
0.08
10 Ibs/ft2
0.39 Ibs/ft2
25.35
STABLE E
Reinforced
Vegetation
Underlying
Straight
2.19 cfs
1.06 ft/s
0.63 ft
0.08
10 Ibs/ft2
0.27 Ibs/ft2
37.49
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213197/show 1 /1

11/8/21, 4:21 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>Q2
Name
Q2
Discharge
2.52
Channel Slope
0.0291
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
2.52 cfs
2.66 ft/s
0.35 ft
0.039
3 Ibs/ft2
0.64 Ibs/ft2
4.72
STABLE E
Unvegetated
Underlying
Straight
2.52 cfs
2.66 ft/s
0.35 ft
0.039
2.84 Ibs/ft2
0.48 Ibs/ft2
5.9
STABLE E
Substrate
SC250
Straight
2.52 cfs
2.01 ft/s
0.44 ft
0.058
10 Ibs/ft2
0.79 Ibs/ft2
12.66
STABLE E
Reinforced
Vegetation
Underlying
Straight
2.52 cfs
2.01 ft/s
0.44 ft
0.058
8.91 Ibs/ft2
0.57 Ibs/ft2
15.5
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213198/show 1 /1

11/8/21, 4:21 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>R1
Name
R1
Discharge
5.6
Channel Slope
0.0214
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
5.6 cfs
3.06 ft/s
0.58 ft
0.039
3 Ibs/ft2
0.77 Ibs/ft2
3.88
STABLE E
Unvegetated
Underlying
Straight
5.6 cfs
3.06 ft/s
0.58 ft
0.039
2.84 Ibs/ft2
0.53 Ibs/ft2
5.33
STABLE E
Substrate
SC250
Straight
5.6 cfs
2.32 ft/s
0.71 ft
0.057
10 Ibs/ft2
0.94 Ibs/ft2
10.58
STABLE E
Reinforced
Vegetation
Underlying
Straight
5.6 cfs
2.32 ft/s
0.71 ft
0.057
8.33 Ibs/ft2
0.62 Ibs/ft2
13.33
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213199/show 1 /1

11/8/21, 4:20 PM
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>>>R2
Name
R2
Discharge
7.58
Channel Slope
0.0165
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
Sandy Loam (GM)
SC250
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 Depth Mannings N Shear Stress Shear Stress Factor Remarks Pattern
SC250
Straight
7.58 cfs
2.99 ft/s
0.73 ft
0.039
3 Ibs/ft2
0.75 Ibs/ft2
3.99
STABLE E
Unvegetated
Underlying
Straight
7.58 cfs
2.99 ft/s
0.73 ft
0.039
2.84 Ibs/ft2
0.49 Ibs/ft2
5.75
STABLE E
Substrate
SC250
Straight
7.58 cfs
2.24 ft/s
0.89 ft
0.058
10 Ibs/ft2
0.92 Ibs/ft2
10.87
STABLE E
Reinforced
Vegetation
Underlying
Straight
7.58 cfs
2.24 ft/s
0.89 ft
0.058
8.83 Ibs/ft2
0.58 Ibs/ft2
15.2
STABLE E
Substrate
https://ecmds.com/project/l50063/channel-analysis/213200/show 1 /1

APPENDIX G
Rainfall Depth Data

Precipitation Frequency Data Server
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=35.9563 &...
NOAA Atlas 14, Volume 2, Version 3
Location name: Spring Hope, North Carolina,
USA*
Latitude: 35.9563°, Longitude:-78.0952'
Elevation: 233.27 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)l
Average recurrence interval (years)
Duration 1 100 1 2 5 10 25 50 00 200 500 1000
0.390 0.442 0.488 0.568 0.637 0.703 0.759 0.811 0.866 0.929
5-min
(0.354-0.431) (0.404-0.484) (0.445-0.535) (0.517-0.623) (0.577-0.697) (0.635-0.770) (0.681-0.830) (0.723-0.889) (0.766-0.952) (0.814-1.02)
0.623 0.706 0.782 0.909 1.01 1.12 1.21 1.29 1.37 1.46
10-min
(0.566-0.689) (0.646-0.774) (0.713-0.856) (0.828-0.996) (0.920-1.11) (1.01-1.23) (1.08-1.32) (1.15-1.41) (1.21-1.51) (1.28-1.61)
0.779 0.888 0.989 1.15 1.29 1.42 1.52 1.62 1.73 1.84
15-min
(0.707-0.861) (0.812-0.973) (0.901-1.08) 1 (1.05-1.26) 1 (1.17-1.41) (1.28-1.55) (1.37-1.67) 11 (1.45-1.78) 1 (1.53-1.89) (1.61-2.02)
1.07 1.23 1.41 1.67 1.91 2.13 2.33 2.53 2.75 2.97
30-min
(0.970-1.18) (1.12-1.35) (1.28-1.54) (1.52-1.83) (1.73-2.09) (1.93-2.34)1 (2.10-2.55) 11 (2.25-2.77) 1 (2.43-3.02) (2.61-3.28)
1.33 1.54 1.80 2.17 2.54 2.89 3.22 3.54 3.94 4.34
60-min
(1.21-1.47) 1 (1.41-1.69) 1 (1.64-1.97) 1 (1.98-2.38) 1 (2.30-2.78) (2.61-3.17) 1 (2.89-3.52) 1 (3.16-3.88) 1 (3.48-4.33) (3.80-4.78)
1.55 1.80 2.12 2.59 3.09 3.60 4.06 4.56 5.19 F 5.85
2-hr
(1.40-1.72) 1 (1.63-1.97) 1 (1.92-2.33) 1 (2.35-2.85) 1 (2.78-3.39) j (3.22-3.94) 1 (3.62-4.45) 1 (4.03-5.00) 1 (4.55-5.69) (5.06-6.43)
1.64 1.91 2.26 2.78 3.33 3.92 I F-4-.47]5.06 5.84 6.66
3-hr
(1.48-1.83) 1 (1.73-2.11) 1 (2.05-2.50) 1 (2.51-3.07) 1 (3.00-3.67) 1 (3.50-4.31) 1 (3.96-4.92) 1 (4.45-5.57) 1 (5.08-6.42) 1 (5.72-7.35)
1.97
2.29
2.72
3.34
4.02
4.75
5.45
6.20
7.19
8.26
6-hr
(1.78-2.19)
1 (2.09-2.53)
1 (2.46-3.00)
1 (3.03-3.68)
1 (3.63-4.42)
1 (4.83-5.96) 11
(5.45-6.78)
1 (6.24-7.87)
(7.06-9.06)
2.32
2.70
3.21
3.98
4.82
5.74
6.62
7.60
8.90
10.3
12-hr
(2.11-2.57)
1 (2.47-2.97)
1 (2.93-3.53)
1 (3.62-4.37)
1 (4.36-5.28)
1 (5.88-7.21) 11
(6.67-8.27)
1 (7.69-9.68)
1 (8.76-11.2)
2.73
3.31
4.25
5.03
6.20
7.20
8.30
9.51
11.3
12.9
24-hr
(2.55-2.95)
(3.09-3.57)
(3.95-4.57)
(4.67-5.42)
(5.71-6.67)
(6.58-7.75)
1 (7.52-8.95)
1 (8.53-10.3)
1 (9.99-12.3)
(11.2-14.1)
3.16
3.81
4.84
5.71
6.98
8.05
9.23
10.5
12.4
14.0
2-day
(2.95-3.40)
(3.57-4.10)
(4.52-5.21)
(5.31-6.14)
(6.44-7.51)
(7.38-8.67)
1 (8.39-9.96)
1 (9.45-11.4)
1 (11.0-13.6)
(12.2-15.4)
3.35
4.04
5.11
5.99
7.29
8.38
9.56
10.8
12.7
14.3
3-day
(3.14-3.60)
(3.78-4.34)
(4.77-5.48)
(5.58-6.43)
(6.74-7.82)
(7.69-8.99)
(8.70-10.3)
(9.77-11.7)
(11.3-13.8)
( 12.5-15.7 )
3.55 4.28 5.37 6.28 7.59 8.70 9.88 11.2 13.0 14.6
4-day
(3.33-3.81) (4.00-4.58) (5.02-5.75) (5.85-6.72) (7.04-8.12) 1 (8.00-9.32) 1 (9.02-10.6) 1 (10.1-12.0) 1 (11.6-14.1) (12.8-15.9)
4.14 4.97 6.18 7.18 8.59 9.76 11.0 12.3 14.2 15.7
7-day
(3.88-4.43) (4.66-5.31) (5.79-6.61) (6.70-7.66) (7.98-9.18) (9.01-10.4) (10.1-11.8) (11.2-13.2) (12.8-15.4) (14.0-17.1)
4.73 5.65 6.93 7.97 9.44 10.6 11.9 13.2 15.1 16.6
10-day
(4.45-5.04) 1 (5.31-6.02) (6.51-7.37) (7.47-8.47) (8.81-10.0) (9.88-11.3) (11.0-12.7) 1 (12.1-14.2) 1 (13.7-16.3) (14.9-18.1)
6.38 7.57 9.14 10.4 12.2 13.6 15.1 16.7 18.8 20.5
20-day
(6.02-6.77) (7.16-8.04) (8.62-9.70) (9.79-11.0) (11.4-12.9) (12.7-14.5) (14.0-16.1) 1 (15.3-17.8) 1 (17.2-20.2) (18.6-22.2)
7.92 9.38 11.1 Ft IV-] 14.4 15.9 17.5 19.0 21.1 22.8
30-day
(7.51-8.37) 1 (8.89-9.91) 11 (10.5-11.8) 1 (11.8-13.2) 1 (13.6-15.2) 1 (14.9-16.9) 1 (16.3-18.5) 1 (17.7-20.2) 1 (19.5-22.6) (20.8-24.4)
10.0 11.8 13.9 15.4 17.6 19.3 21.0 22.7 25.0 26.7
45-day
(9.57-10.6) 1 (11.3-12.5) (13.2-14.6) 1 (14.7-16.3) 1 (16.6-18.6) 1 (18.2-20.3) 1 (19.7-22.2) 1 (21.2-24.0) 1 (23.1-26.6) (24.6-28.6)
12.1 14.2 16.4 18.1 20.4 22.2 23.9 25.6 27.9 29.6
60-day
(11.5-12.7) (13.6-14.9) (15.7-17.2) (17.3-19.0) (19.4-21.4) (21.0-23.3) (22.6-25.2) (24.1-27.0) (26.1-29.6) (27.5-31.5)
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
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Precipitation Frequency Data Server
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30
25
c
r 20
t
d
¢ 15
49
a
E10
5
!1
30
25
e
20
a
15
49
CL
10
CL
PD5-based depth -duration -frequency (DDF) curves
Latitude: 35.9563", Longitude:-78.0952"
E E E N A Lb r� � -0 -0-0 M-U M M MM
6' OO Lf O O ' , N N A 4 r: OO OO OO ui OO
r-I H rn LO ri N rn V tQ
Duration
5
0
----------------
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 31 14:55:33 2021
Back to Top
Maps & aerials
Small scale terrain
Average recurrence
w1wal
{years}
— 1
2
5
— 10
25
50
100
200
500
1000
Duration
5-min —
2-day
— 10-mrn —
3-day
15-min —
4-day
30-min —
7-day
— 60-tnrn —
10-day
— 2-hr —
20-day
— 3-hr —
30-day
— 6-hr —
45-day
— 12-hr —
60-day
24-hr
2 of 4
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Precipitation Frequency Data Server
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=35.9563 &...
i gallok
Urn White 04
2mi
Large scale terrain
}
• • DUI'h and '
reensboro • Rocky Mount'
—ice
Raleigh
A R O L I N A ' Greenville
Ate FavettPvillp
100km
Jacksonville.
60mi •
Large scale map
airin Greensboro Drhsm I
Rocky Mount
�■ n
Raleigh'
NorthGreenville
Carolina
F a; atte%i II3
100km
Jacksonville
60mi
Large scale aerial
Norlolk
a Vi
3 of 4
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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?: [e-mail]
Disclaimer
4 of 4 5/31/2021, 10:55 AM

Precipitation Frequency Data Server
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=35.9563 &...
NOAA Atlas 14, Volume 2, Version 3
Location name: Spring Hope, North Carolina,
USA*
Latitude: 35.9563°, Longitude:-78.0952'
Elevation: 233.27 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
II PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches/hour)l 11
recurrence interval
10 11 25 11 50 11 100 11 200 11 500 11 1000
4.68
5.30
5.86
6.82
7.64
8.44
9.11
9.73
10.4
11.1
5-min
(4.25-5.17)
(4.85-5.81)
(5.34-6.42)
(6.20-7.48)
(6.92-8.36)
1 (7.62-9.24)
1 (8.17-9.96)
1 (8.68-10.7)
(9.19-11.4)
(9.77-12.3)
3.74
4.24
4.69
5.45
6.08
6.72
7.24
7.71
8.22
8.78
10-min
(3.40-4.13)
(3.88-4.64)
(4.28-5.14)
(4.97-5.98)
(5.52-6.67)
1 (6.49-7.91)
(6.88-8.45)
(7.27-9.03)
(7.69-9.67)
3.12
3.55
3.96
4.60
5.14
5.67
6.10
6.49
6.90
7.35
15-min
(2.83-3.44)
1 (3.25-3.89)
1 (3.60-4.33)
1 (4.19-5.04)
1 (4.66-5.63)
(5.12-6.21)
1 (5.47-6.67)
1 (5.78-7.11)
1 (6.10-7.58)
1 (6.44-8.09)
2.14
2.45
2.81
3.33
3.81
4.27
4.67
5.05
5.49
5.95
30-min
(1.94-2.36)
(2.24-2.69)
(2.56-3.08)
(3.03-3.65)
(3.45-4.17)
(3.86-4.67)
(4.19-5.11)
(4.50-5.53)
(4.86-6.03)
(5.21-6.55)
60-min 1.33 11 1.54 11 1.80 11 2.17 11 2.54 2.89 11 3.22 11 3.54 11 3.94 1 4.34
(1.21-1.47) 1 (1.41-1.69) 1 (1.64-1.97) 1 (1.98-2.38) 1 (2.30-2.78) (2.61-3.17) 1 (2.89-3.52) 1 (3.16-3.88) 1 (3.48-4.33) (3.80-4.78)
2-hr 0.774 0.898 1.06 1.30 1.54 1.80 2.03 2.28 2.60 2.92
(0.698-0.858) (0.816-0.986) (0.961-1.17) 1 (1.17-1.42) 1 (1.39-1.69) j (1.61-1.97) 1 (1.81-2.23) 1 (2.02-2.50) 1 (2.27-2.85) 1 (2.53-3.22)
3-hr 0.545 0. 334 0.751 0. 2 Al F 1.11 1.30 1.49 1.69 1.94 2.22
(0.492-0.608) (0.577-0.703) (0.681-0.832) (0.836-1.02) (0.998-1.22) 1 (1.17-1.44) 1 (1.32-1.64) 1 (1.48-1.85) 1 (1.69-2.14) 1 (1.90-2.45)
6-hr 0.328 0.383 0.453 0.558 0.672 0.793 0.909 1.04 1.20 1.38
(0.298-0.366) (0.348-0.423) (0.411-0.500) (0.506-0.615) (0.606-0.738) (0.710-0.870) (0.807-0.996) (0.909-1.13) 1 (1.04-1.31)
12-hr 0.193 F 0.224 7 0.267 0.330 0.400 0.476 0.549 0.631 0.739 0.856
(0.175-0.213) (0.205-0.247) (0.243-0.293) (0.300-0.362) (0.362-0.438) (0.427-0.519) (0.488-0.598) (0.553-0.686) (0.638-0.804) (0.727-0.933)
24-hr 0.114 0.138 0.177
(0.106-0.123) (0.129-0.149) (0.165-0.190)
2-day 0.066 0.079 7 0.101
(0.061-0.071) (0.074-0.085) (0.094-0.109)
0.210
0.258
0.300
0.346
0.396
0.472
0.537
(0.195-0.226)
(0.238-0.278)
(0.274-0.323)
(0.313-0.373)
(0.355-0.429)
(0.416-0.514)
(0.467-0.588)
0.119
0.145
0.168
0.192
0.219
0.259
0.293
(0.111-0.128)
(0.134-0.156)
(0.154-0.181)
(0.175-0.208)
(0.197-0.238)
(0.229-0.283)
(0.255-0.321)
3-day 0.047 0.056 0.071 0.083 0.101 0.116 0.133 0.151 0.177 0.199
(0.044-0.050) (0.053-0.060) (0.066-0.076) (0.078-0.089) (0.094-0.109) (0.107-0.125) (0.121-0.143) (0.136-0.163) (0.157-0.192) (0.174-0.218)
4-day 0.037 0.045 0.056
(0.035-0.040) (0.042-0.048) (0.052-0.060)
7-day 0.025 0.030 0.037
(0.023-0.026) (0.028-0.032) (0.034-0.039)
0.065
0.079
0.091
0.103
0.116
0.136
0.152
(0.061-0.070)
(0.073-0.085)
(0.083-0.097)
(0.094-0.111)
(0.105-0.125)
(0.121-0.147)
(0.134-0.166)
0.043
0.051
0.058
0.065
0.073
0.084
0.094
(0.040-0.046)
(0.048-0.055)
(0.054-0.062)
(0.060-0.070)
(0.067-0.079)
(0.076-0.091)
(0.083-0.102)
0.020
F 0.024
F 0.029
0.033
0.039 IF
0.044
0.050
0.055
0.063
0.069
10-day
(0.019-0.021)
(0.022-0.025)
(0.027-0.031)
(0.031-0.035)
(0.037-0.042)
(0.041-0.047)
(0.046-0.053)
(0.050-0.059)
(0.057-0.068)
(0.062-0.075)
0.013
1 0.016
F 0.019
0.022
0.025
0.028
0.031
0.035
0.039
0.043
20-day
(0.013-0.014)
(0.015-0.017)
(0.018-0.020)
(0.020-0.023)
(0.024-0.027)
(0.026-0.030)
(0.029-0.033)
(0.032-0.037)
(0.036-0.042)
(0.039-0.046)
30-day 0.011 0.013 0.015 0.017 0.020 0.022 0.024 0.026 0.029 0.032
(0.010-0.012) (0.012-0.014) (0.015-0.016) (0.016-0.018) (0.019-0.021) (0.021-0.023) (0.023-0.026) (0.025-0.028) (0.027-0.031) (0.029-0.034)
45-day 0.009 0.011 0.013 0.014 0.016 0.018 0.019 0.021 0.023 0.025
(0.009-0.010) (0.010-0.012) (0.012-0.014) (0.014-0.015) (0.015-0.017) (0.017-0.019) (0.018-0.021) (0.020-0.022) (0.021-0.025) (0.023-0.026)
60-day (0. 08-0 009)(0. 09-0 010)(0.01100 012)(0.01 -0 013)(0.01 -0 015)(o.015-0 0161 (0.016-0 017)(0.017--0 019)(0.018-0 021) (0.019-0 022)
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.
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PF graphical
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100.000
° 0_100
49
a 0.010
PDS-based intensity -duration -frequency (IOF) curves
Latitude: 35.95631, Longitude:-78.09521
0.001 L I I I I I
Y'7 O 4f'I O O N N r7 q r: O OO OO Ln OO
ri ri rn 4O ri N rn V tQ
Duration
100.000
c
0.100
T
9-
U
0.010
0.001' ' ' ' ' ' ' ' ' 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 31 14:56:23 2021
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Maps & aerials
Small scale terrain
Average recurrence
w1wal
{years}
— 1
2
5
— 10
25
50
100
200
500
— 1000
Duration
5-min —
2-day
— 10-mrn —
3-day
15-min —
4-day
30-min —
7-day
— 60-tnrn —
10-day
— 2-hr —
20-day
— 3-hr —
30-day
— 6-hr —
45-day
— 12-hr —
60-day
24-hr
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Precipitation Frequency Data Server
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i gallok
Urn White 04
2mi
Large scale terrain
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reensboro • Rocky Mount'
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Raleigh
A R O L I N A ' Greenville
Ate FavettPvillp
100km
Jacksonville.
60mi •
Large scale map
airin Greensboro Drhsm I
Rocky Mount
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Raleigh'
NorthGreenville
Carolina
F a; atte%i II3
100km
Jacksonville
60mi
Large scale aerial
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a Vi
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Silver Spring, MD 20910
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