SW6230501_Design Calculations_20230721

mP4Dsite
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civil engineering I land surveying
Ila's Way Subdivision Storm Water Narrative
The subject site is currently undeveloped. The proposed development of this site
includes single family residential lots. Storm water drainage for the proposed
development will be conveyed towards the driveway pipe located along Ashe Avenue
and the northwestern and northeastern boundary of the project.
The site meets the qualifications of a low density development. The average density for
the development is 1.46 units/acre compared to the maximum of 2 units/acre to satisfy
the requirements set forth by NCDEQ. Storm water will sheet drain across lots and
collect into ditching along the internal driveways. The roads in the subdivision are
designed in accordance with NCDOT standards.
Based on our study and review of the NCDEQ BMP manual and NC Session Law 2006-
246 Section 9 paragraph c, Ila's Way Subdivision meets and/or exceeds the
requirements and intent for low density development.
409 Chicago Drive, Suite 112, Fayetteville, NC 28306
office 1910-426-6777 fax [phone]
On time,every time. I www.4Dsitesolutions.com

1924—ILA'S WAY SUBDIVISION
EC Matting Calculations
Ditch#1
® North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
ENGLISH. IUSER I I322 03:04 PM I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs) Radius(ft) . Depth(ft) I I
17.1 0.2 2.45 2.90 0.47 0.90
S=0.0120
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch.50-75% 3.33 0.68 4.92 STABLE
Soil Sandy Loam 0.035 0.062 0.57 UNSTABLE
II North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
ENGLISH. IUSER I 9/22/2022 03:10 PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.045)
(cfs) Period(hrs), Radius(ft) _ Depth(ft)17.1 0.2 2.25 3.16 0.49 0.95 f
S=0.0120
1 L Bottom _l 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics 1
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight S75 Unvegetated 1.55 0.71 2.19 STABLE
Staple D

Ditch#2
Q North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
'ENGLISH. (USER I I322 03:14 PM I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs) . Radius(ft) , Depth(ft)
h.8 0.1 1.89 0.95 0.27 0.49
S=0.0150
1 L Bottom _l 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 50.75%. 3.33 0.46 7.31 STABLE
Soil Sandy Loam 0.035 0.042 0.84 . UNSTABLE
. North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
ENGLISH. IUSER I 9/22/2022 03:14 PM I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.054)
(cfs) ,Period(hrs)_ _ Radius(ft) Depth(it) I
1.8 0.1 1.51 1.19 0.30 0.55
S=0.0150
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight S75 Unvegetated _ 1.55 0.52 3.00 STABLE
Staple D

Ditch#3
III North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
ENGLISH. IUSER I Ilfil. 116 PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs) Radius(ft) _ Depth(ft)
30.8 0.2 2.10 14.66 1.05 2.13
S=0.0030
1 L Bottom J 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psf)
Straight Unreinforced Vegetation D Bunch.50.75% 3.33 0.40 8.36 STABLE
Soil Sandy Loam 0.035 0.036 0.96 . UNSTABLE
.II North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
ENGLISH. IUSER I 9122l2022 03:17 PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.026)
(cfs) Period(hrs) Radius(ft) , Depth(ft)
30.8 0.2 2.93 10.52 0.89 1.79
S =0.0030
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase i Class Type Density' Shear Stress Shear Stress
(psf) (psi)
' • ' -
Straight S75 Unvegetated _ I 1.55 0.34 4.62 STABLE
Staple D

Ditch#4
nDrth American Green ECMDS Version 4.3 - Channel Protection Design, Output Form
rue Specifications Options Help
IENGLISH. IUSER I I322 IIMI PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs) Radius(ft) Depth(ft)
24.7 0.2 3.64 6.79 ' 0.71 1.42
S=0.0150
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern ' Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 50.75% 3.33 1.33 2.50 STABLE
Soil Sandy Loam 0.035 0.122 0.29 UNSTABLE
ill North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
'ENGLISH. IUSER I 1322 ICI PM I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.036)
(cfs) Period(hrs)• _ Radius(ft) Depth(ft)
24.7 • 0.2 3.97 6.22 0.68 1.36
S=0.0150
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight S75 Unvegetated _ 1.55 1.27 1.22 STABLE
Staple D

Ditch#5
0 North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
(ENGLISH. IUSER I 9I22I2022 03:22 PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) .Period(hrs) Radius(ft) . Depth(ft)
•
0.9 0.1 2.05 0.44 0.18 0.31
S=0.0300
1 L Bottom 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 3.33 0.58 5.77 STABLE
Soil Sandy Loam 0.035 0.053 0.66 UNSTABLE
II North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
!ENGLISH. IUSER I 9122l2022 IlUDNI
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.055)
(cfs) Period(hrs) Radius(ft) Depth(ft) I 0.9 0.1 1.61 0.56 0.20 0.36
S=0.0300
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight - S75 Unvegetated 1.55 0.67 2.33 : STABLE
Staple D

Ditch#6
Ell North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
(ENGLISH. IUSER I 1322 03:26 PM I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrsL - Radius(ft) - Depth(ft) I I
3.4 0.1 1.47 2.32 0.42 0.80
- - __. S=0.0050
1 L Bottom 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
.
•
Straight Unreinforced Vegetation D Bunch 50.75% 3.33 0.25 13.35 STABLE
•
Soil Sandy Loam 0.035 0.023 1.54 STABLE
Ditch#7
0 North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
'ENGLISH. (USER I 9/22/2022 Ic .m
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) -Period(Ns). Radius(ft) Depth(ft)
2.2 0.1 2.57 0.86 0.25 0.46
S=0.0300
1 L Bottom J 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern ' 'Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
- � •
Straight Unreinforced Vegetation D Bunch 50.75% 3.33 0.86 3.89 STABLE
Soil Sandy Loam 0.035 0.078 0.45 UNSTABLE

III North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
(ENGLISH. (USER I 1322 03:27 PM 1
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.054)
(cfs) Period(hrs)_ Radius(ft) _ Depth(ft)
12.2 0.1 2.04 1.08 0.28 0.52
S =0.0300
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight S75 Unvegetated - 1.55 0.98 1.59 STABLE
Staple D
Ditch#8
li North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
ENGLISH. (USER I 9/27/2022 03:20 PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n 0.040)
(cis) Period(hrs) _ , Radius(ft) Depth(ft)
3.1 0.2 1.99 1.56 0.34 0.64
S=0.0120
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern ' Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch.50.75% 3.33 0.48 6.92 STABLE
Soil Sandy Loam 0.035 - 0.044 0.80 UNSTABLE

UNorth American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
IENGLISH. IUSER ( 9/27/2022 linai PH I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.050)
(cfs) Period(hrs)_ _ Radius(ft) , Depth(ft)
1.3.1 0.2 1.67 1.85 0.37 0.71
S=0.0120
1 L Bottom _1 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psf)
Straight S75 Unvegetated 1.55 0.53 2• .93 - STABLE
Staple D
ROADSIDE DITCH
LI North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
FENGLISH. (USER I 7/18/2023 07:11 AM I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cis) _Period(hrs) Radius(ft) . Depth(ft)
112.2 0.3 2.29 5.33 0.63 1.25
S=0.0070
1 L Bottom 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psf) (psf)
Straight Unreinforced - Vegetation D .Bunch 50.75% 3.33 0.55 _ 6.09 - STABLE
Soil Sandy Loam 0.035 0.050 0.70 UNSTABLE

.Il North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
ENGLISH. (USER I 17/1E107: 11
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal C125(n=0.020)
(cis) Period(hrs). Radius(ft) , Depth(ft) f I
12.2 0.3 3.90 3.13 0.48 0.94
S=0.0070
1 L Bottom _1 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern ' Phase Class Type Density Shear Stress Shear Stress
(psf) (psi)
Straight C125 Unvegetated 2.25 0.41 5.48 • STABLE
Staple D

4D Site Solutions, Inc.
DITCH CALCULATIONS
NOTE:sheet only set up to handle Tc from 5 min to 30 min
A. Flow velocity<2.0 fps when discharging to wetlands B. Flow velocity<4.5 fps all other cases** C. Channel slope<5.0%for curb outlet swales
1924-ILA'S WAY SUBDIVISION
Rainfall Intensity
Storm Event
5-min 10-min 15-min 30-min
10-yr 7.88 6.31 5.32 3.85
25-yr 8.80 7.01 5.92 4.38
50-yr 9.48 7.55 6.37 4.80
100-yr 10.10 8.05 6.78 5.19
Tc
Drainage Impervious Grassed Storm Rainfall
Ditch No. C Kerby Kirpich Intensity Q(cfs)
Area(ac) Area(ac) Area(ac) Event(yr)
Total Tc Tc Used (in/hr)
L(ft) n s Toy, L(ft) S Tch
1 2.82 0.43 2.39 0.40 n/a 1450.0 0.010 12.48 12.48 10 10-yr 6.31 7.12
2 0.52 0.12 0.40 0.45 n/a 740.0 0.010 7.44 7.44 5 10-yr 7.88 1.84
3 13.95 1.07 12.88 0.35 n/a 975.0 0.008 10.02 10.02 10 10-yr 6.31 30.81
4 11.17 0.86 10.31 0.35 n/a 825.0 0.009 8.42 8.42 10 10-yr 6.31 24.67
5 0.24 0.06 0.18 0.45 n/a 325.0 0.011 3.80 3.80 5 10-yr 7.88 0.85
6 0.97 0.22 0.75 0.45 n/a 430.0 0.010 4.90 4.90 5 10-yr 7.88 3.44
7 0.61 0.14 0.47 0.45 n/a 285.0 0.013 3.22 3.22 5 10-yr 7.88 2.16
8 1.09 0.25 0.84 0.45 n/a 1450.0 0.010 12.48 12.48 10 10-yr 6.31 3.10
ROADSIDE 5.09 1.17 3.92 0.45 n/a 1550.0 0.010 13.14 13.14 15 10-yr 5.32 12.19
printed:7/21/2023 1:35 PM Page 1 of 1

4D Site Solutions, Inc.
PIPE CALCULATIONS
NOTE:sheet only set up to handle Tc from 5 min to 30 min
A. Cross-pipes to use 25-yr storm inensity
1924-ILA'S WAY SUBDIVISION
Rainfall Intensity
Storm Event 5-m'
IO-yr 7.88 6.31 5.32 3.85
25-yr 8.8 7.01 5.92 4.38
50-yr 9.48 7.55 6.37 4.8
100-yr 10.1 8.05 6.78 5.19
Tc
Drainage Storm Rainfall
Pipe No. C Kerby Kirpich Intensity Q(cfs)
Area(ac) Event(yr)
Total Tc Tc Used (in/hr)
L(ft) n s L(ft) S Tch
1 4.10 0.35 n/a 1500.0 0.010 12.81 12.81 15 25-yr 5.92 8.50
2 n/a n/a 0.00 5 25-yr 8.8 0.00
3 n/a n/a 0.00 5 25-yr 8.8 0.00
4 n/a n/a 0.00 5 25-yr 8.8 0.00
5 n/a n/a 0.00 5 25-yr 8.8 0.00
6 n/a n/a 0.00 5 25-yr 8.8 0.00
printed:7/5/2023 11:38 AM Page 1 of 1

Culvert Report
Hydraflow Express Extension for Autodesk®Civil 3D®by Autodesk, Inc. Tuesday,Jul 18 2023
PIPE 1
Invert Elev Dn (ft) = 209.80 Calculations
Pipe Length (ft) = 72.00 Qmin (cfs) = 8.29
Slope (%) = 0.83 Qmax (cfs) = 8.29
Invert Elev Up (ft) = 210.40 Tailwater Elev (ft) = (dc+D)/2
Rise (in) = 18.0
Shape = Circular Highlighted
Span (in) = 18.0 Qtotal (cfs) = 8.29
No. Barrels = 1 Qpipe (cfs) = 8.29
n-Value = 0.012 Qovertop (cfs) = 0.00
Culvert Type = Circular Concrete Veloc Dn (ft/s) = 5.07
Culvert Entrance = Square edge w/headwall (C) Veloc Up (ft/s) = 5.89
Coeff. K,M,c,Y,k = 0.0098, 2, 0.0398, 0.67, 0.5 HGL Dn (ft) = 211 .11
HGL Up (ft) = 211 .51
Embankment Hw Elev (ft) = 212.27
Top Elevation (ft) = 213.30 Hw/D (ft) = 1.25
Top Width (ft) = 44.00 Flow Regime = Inlet Control
Crest Width (ft) = 50.00
Elev(n) PIPE I Hw Depth(0)
21400 3.60
21300 2.60
InIMCOnhG _
212 00 t
211 A0 0.50
210.00 -0A0
209.00 -1.40
200.00 3.40
0 5 10 15 20 25 30 35 e0 e5 50 55 00 55 A 75 R] B5 90 g
C1lculelCulvert HGL Emeenk
Reath(11)

OUTLET PROTECTION DATE DESIGN PHASE
DESIGN 9-26-22 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
ILA'S WAY SUBDIVISION 1924 REVISION / /
LOCATION BY RECORD / /
Harnett County, North Carolina BPB OTHER / /
CHECKED BY (SPECIFY)
CSB
Storm Outlet Structure
FES No.= PIPE 1 OUT Q1o/Qfull = 0.89
Pipe Dia= 18 in V/Vfull = 1.13
Q10= 8.50 cfs V= 6.1 fps
Qfull = 9.60 cfs
Vfull = 5.40 fps
From Fig. 8.06.b.1: Zone = 2
I
From Fig. 8.06.b.2: D5o = 8 in
DMAX = 12 in
Riprap Class = B
s Apron Thickness = 18 in
3 Apron Length = 9.0 ft
Apron Width @ Outlet = 4.5 ft
Apron Width @ End = 10.5 ft
Length
1924-Storm drainage.xlsx LATEST REVISION:7/5/2023 11:37 AM PAGE 1 OF 1

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USDA United States A product of the National Custom Soil Resource
Department of Cooperative Soil Survey,
Agriculture a joint effort of the United Report for
States Department of
N RCS Agriculture and other Harnett County
Federal agencies, State
Natural agencies including the North Carolina
Resources Agricultural Experiment
Conservation Stations, and local
Service participants
f
u
4
0 M=MMMI �7 ft
September 27, 2022

Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nres.usda.gov/wps/
portal/nres/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https://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(202) 720-6382 (TDD). USDA is an equal opportunity
provider and employer.
3

Contents
Preface....................................................................................................................2
How Soil Surveys Are Made..................................................................................5
SoilMap.................................................................................................................. 8
SoilMap................................................................................................................9
Legend................................................................................................................10
MapUnit Legend................................................................................................ 11
MapUnit Descriptions.........................................................................................11
Harnett County, North Carolina.......................................................................13
NoA—Norfolk loamy sand, 0 to 2 percent slopes........................................13
NoB—Norfolk loamy sand, 2 to 6 percent slopes........................................14
Ra—Rains sandy loam, 0 to 2 percent slopes............................................ 15
References............................................................................................................18
4

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

Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.
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Custom Soil Resource Report
Soil Map
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Meters
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0 50 100 200 300
Feet
0 200 400 800 1200
Map projection:Web Mercator Comer coordinates:WGS84 Edge tics:UTM Zone 17N WGSS84
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Custom Soil Resource Report
MAP LEGEND MAP INFORMATION
Area of Interest(AOI) Spoil Area The soil surveys that comprise your AOI were mapped at
0 Area of Interest(AOI) Stony Spot 1:24,000.
Soils Very Stony Spot
0 Soil Map Unit Polygons Warning:Soil Map may not be valid at this scale.
Wet Spot
P1 0 Soil Map Unit Lines Enlargement of maps beyond the scale of mapping can cause
Other misunderstanding of the detail of mapping and accuracy of soil
� Soil Map Unit Points 9 pp 9 Y
.- Special Line Features line placement.The maps do not show the small areas of
Special Point Features contrasting soils that could have been shown at a more detailed
Lo Blowout Water Features scale.
- Streams and Canals
Borrow Pit
Transportation Please rely on the bar scale on each map sheet for map
Clay Spot 1-44 Rails measurements.
Closed Depression
Interstate Highways
Gravel Pit Source of Map: Natural Resources Conservation Service
US Routes Web Soil Survey URL:
Gravelly Spot Major Roads Coordinate System: Web Mercator(EPSG:3857)
0 Landfill Local Roads Maps from the Web Soil Survey are based on the Web Mercator
Lava Flow Background projection,which preserves direction and shape but distorts
distance and area.A projection that preserves area,such as the
Marsh or swamp Aerial Photography Albers equal-area conic projection,should be used if more
Mine or Quarry accurate calculations of distance or area are required.
Miscellaneous Water This product is generated from the USDA-NRCS certified data as
Perennial Water of the version date(s)listed below.
Rock Outcrop Soil Survey Area: Harnett County,North Carolina
Saline Spot Survey Area Data: Version 19,Jan 21,2022
Sandy Spot Soil map units are labeled(as space allows)for map scales
Severely Eroded Spot 1:50,000 or larger.
Sinkhole Date(s)aerial images were photographed: Apr 24,2022—May
Slide or Slip 9,2022
oa Sodic Spot The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps.As a result,some minor
shifting of map unit boundaries may be evident.
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Custom Soil Resource Report
Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
NoA Norfolk loamy sand,0 to 2 22.3 82.8%
percent slopes
NoB Norfolk loamy sand,2 to 6 4.5 16.7%
percent slopes
Ra Rains sandy loam,0 to 2 0.1 0.5%
percent slopes
Totals for Area of Interest 27.0 100.0%
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
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
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Custom Soil Resource Report
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
Harnett County, North Carolina
NoA—Norfolk loamy sand, 0 to 2 percent slopes
Map Unit Setting
National map unit symbol: 2v75w
Elevation: 10 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: 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: Broad interstream divides on marine terraces, flats on marine terraces
Landform position (three-dimensional):Talf
Down-slope shape: Convex, linear
Across-slope shape: Convex, linear
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: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
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 supply, 0 to 60 inches: Moderate (about 6.9 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 1
Hydrologic Soil Group: A
Hydric soil rating: No
Minor Components
Goldsboro
Percent of map unit: 9 percent
Landform: Flats on marine terraces, broad interstream divides on marine terraces
Landform position (three-dimensional):Talf
Down-slope shape: Linear
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Custom Soil Resource Report
Across-slope shape: Linear
Hydric soil rating: No
Wagram
Percent of map unit: 8 percent
Landform: Broad interstream divides on marine terraces, ridges on marine
terraces
Landform position (two-dimensional): Summit, shoulder
Landform position (three-dimensional): Crest, talf
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: Broad interstream divides on marine terraces, flats on marine terraces
Landform position (three-dimensional):Talf
Down-slope shape: Convex, linear
Across-slope shape: Convex, linear
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
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
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Custom Soil Resource Report
Frequency of ponding: None
Available water supply, 0 to 60 inches: 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: Flats on marine terraces, broad interstream divides on marine terraces
Landform position (three-dimensional):Talf
Down-slope shape: Linear
Across-slope shape: Linear
Hydric soil rating: No
Ra—Rains sandy loam, 0 to 2 percent slopes
Map Unit Setting
National map unit symbol: 2v760
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: 58 percent
Rains, drained, and similar soils:24 percent
Minor components: 18 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Rains, Undrained
Setting
Landform: Carolina bays on marine terraces, broad interstream divides on marine
terraces, flats on marine terraces
Landform position (three-dimensional): Dip, talf
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Custom Soil Resource Report
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Loamy marine deposits
Typical profile
A -0 to 6 inches: sandy loam
Eg- 6 to 12 inches: sandy loam
Btg- 12 to 65 inches: sandy clay loam
BCg- 65 to 80 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
(0.20 to 1.98 in/hr)
Depth to water table:About 0 inches
Frequency of flooding: None
Frequency of ponding: None
Available water supply, 0 to 60 inches: Moderate (about 7.9 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4w
Hydrologic Soil Group: A/D
Hydric soil rating: Yes
Description of Rains, Drained
Setting
Landform: Carolina bays on marine terraces, broad interstream divides on marine
terraces, flats 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 6 inches: sandy loam
Eg- 6 to 12 inches: sandy loam
Btg- 12 to 65 inches: sandy clay loam
BCg- 65 to 80 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
(0.20 to 1.98 in/hr)
Depth to water table:About 12 to 36 inches
Frequency of flooding: None
Frequency of ponding: None
Available water supply, 0 to 60 inches: Moderate (about 7.9 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3w
Hydrologic Soil Group: B
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Custom Soil Resource Report
Hydric soil rating: Yes
Minor Components
Lynchburg
Percent of map unit: 10 percent
Landform: Flats on marine terraces, broad interstream divides on marine terraces
Landform position (three-dimensional):Talf
Down-slope shape: Linear
Across-slope shape: Linear
Hydric soil rating: No
Pantego, undrained
Percent of map unit: 8 percent
Landform: Stream terraces, flats, broad interstream divides
Landform position (three-dimensional):Tread, talf
Down-slope shape: Linear
Across-slope shape: Concave
Hydric soil rating: Yes
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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
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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
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