Telecommunications Reliability Facility - Fort Bragg - (2) rpt_telecom_100pct_permitting

FOUO
FOUO

EROSION AND SEDIMENT
CONTROL AND
STORMWATER
MANAGEMENT
NARRATIVE

Telecommunications
Reliability Facility
Fort Bragg, NC
PN 81894

27 September 2018

Prepared by
Stantec Consulting Services Inc.
Raleigh, North Carolina

9/27/2018
FOUO
i
FOUO
TABLE OF CONTENTS

EXECUTIVE SUMMARY EXEC SUMMARY-1

SECTION 1 INTRODUCTION 1-1

SECTION 2 EXISTING INFRASTRUCTURE 2-1
2.1 PROPOSED SITE 2-1
2.2 WATER SUPPLY SYSTEM 2-1
2.3 WASTEWATER COLLECTION SYSTEM 2-1

SECTION 3 EXTERIOR IMPROVEMENTS 3-1
3.1 CRITERIA AND REFERENCES 3-1
3.2 GRADING AND DRAINAGE 3-1

APPENDIX A CIVIL CALCULATIONS AND NRCS SOILS

FOUO

Design Narrative
Dining Facility, SOTF
FOUO
1-1
Section 1
INTRODUCTION
This design narrative describes the programming information for the
proposed telecommunications facility and redundant fiber ring. Meetings
and conversations have been held with the USACE Wilmington, Security
Operations Training Facility (SOTF) Engineers and User personnel and
were combined with on-site facilities examinations and operations
observations to refine these recommendations.
SOTF operates within its own compound located off Lamont Road in Fort
Bragg, North Carolina. SOTF structures are purpose built, secure, and
technology driven all in service of the Special Operations Forces (SOF) they
house and support.
The purpose of this project is to provide architectural, site, utility and
building engineering design and probable costs of construction and
installation for a new Telecommunications Reliability Facility and redundant
fiber ring connections within the SOTF Compound at Fort Bragg.
The design, floor plan and layout of the proposed Telecommunications
Reliability Facility is based on the detailed feedback and recommended
programming adjustments received at the kickoff meeting and subsequent
review meetings. The routing of the proposed fiber ring was discussed in
detail and refined to the alignments presented herein by on-site physical
examination of the existing manholes and handholes. The recommended
routing uses existing conduits and structures to the maximum extent
possible, and minimizes the requirements for new excavation, conduit and
structures.

Existing information from previous surveys, where available, was collected
and used to plan the routing and connections for the study. Topographic
survey data was also collected to verify locations of all existing visible
surface structures within the study area and along the study corridor. This
survey data collection included the proposed corridor connecting the
1-1
FOUO

Design Narrative
Dining Facility, SOTF
FOUO
1-2
Lamont Road gate area with buildings O190M, O190N and O190L, the area
between those buildings, and along the connecting corridors between that
area and the proposed Telecommunications Reliability Facility location.
Existing site conditions were observed at the proposed future
Telecommunications Reliability Facility site to allow design of the proposed
building, gravel parking lot and necessary support facilities.

1-2
FOUO

Design Narrative
Dining Facility, SOTF
FOUO
J-1
Section 2
EXISTING INFRASTRUCTURE
2.1 PROPOSED SITE
The proposed site for the Telecommunications Reliability Facility is
in the southwestern portion of the SOTF Compound immediately
west of the existing antenna field. The existing site is generally
devoid of vegetation.
Site utilities, which are present along McKellars Road, shall be
extended and expanded to serve the new Telecommunications
Reliability Facility. These utilities are addressed individually in
subsequent sections of this report.
Note that all utilities to be extended and/or expanded to service this
site are within previously disturbed areas. The proposed site is also
within the half-mile forage partition of Red-cockaded Woodpecker
cluster 429. Tree removal will be required for this project but is not
anticipated to impact woodpecker habitats.
2.2 WASTEWATER COLLECTION SYSTEM
No wastewater collection services are proposed for this project.
2.3 STORM SEWER SYSTEM
No structured storm sewer system exists on the site. The existing
land slopes from west to east and stormwater eventually collects in
a combination of swales, ditches and culverts to discharge on the
west side of the parking lot on the west side of building O190M.

FOUO

Design Narrative
Dining Facility, SOTF
FOUO
J-1
Section 3
EXTERIOR IMPROVEMENTS
3.1 CRITERIA AND REFERENCES
All exterior improvements shall be designed and constructed in
accordance with the latest Fort Bragg Installation Design Guide
(IDG), the North Carolina Department of Environmental Quality
(NCDEQ) requirements for Erosion and Sediment Control.
United Facilities Criteria (UFC) standards include:
1-200-10N – Civil Engineering.
3-210-01A - Design Area Planning Site Planning and Design.
3-210-02 – POV Site Circulation and Parking.
3-230-04A - Design Water Distribution.
4-010-01 – Minimum Antiterrorism Standards for Buildings.
3.2 GRADING AND DRAINAGE
The proposed Telecommunications Reliability Facility site is
currently partially cleared of vegetation and slopes from west to east.
Stormwater runoff sheet flows towards the existing antenna field
located east of the project site.

The finished floor elevation of the new building will be set to balance
the cut and fill required and provide positive drainage away from the
building. Runoff from the roof drains will be drained via surface flow
from the downspouts into a stormwater management (SWM)
infiltration facility. A saddle point at the southwest corner of this
building ensures that the rear mechanical yard also drains to the
same SWM infiltration facility as the roof leaders. The SWM facility
is located immediately west of the existing security camera pole. The
3-1
FOUO

Design Narrative
Dining Facility, SOTF
FOUO
J-1
majority of the remaining sidewalks and parking lot will drain to the
southeast corner of the site adjacent to the proposed driveway
access. Both SWM facilities are sized to store the EISA required
volume (See Appendix A for calculation summary). A small portion
of sidewalk and the lawn and pea gravel areas in the front of the
building will drain to the existing parking lot via sheet flow. An un-
mowed vegetated lawn buffer between the parking lot and building
embankment should ensure no erosion or high volumes of
stormwater affect the existing parking lot.

The SWM infiltration facilities will be approximately 4’-8” deep
comprising a 2” layer of pea gravel, 4’ of 1-1/2” – 2-/12” diameter
clean stone, and a 6” layer of washed sand. Each facility will have
one observation well for maintenance and monitoring. A temporary
sedimentation and erosion control plan will be required by the Fort
Bragg Water Management Branch (WMB). The erosion control at
the building site shall consist of a temporary construction
entrance/exit will be located adjacent to the parking lot on the
southeast corner of the site, sediment fence will be placed on the
north and east side of the site, and a sediment fence outfall on the
northwest corner and the southeast corner. Two stormwater
management infiltration trenches will be placed strategically on site.
One will be located on the northwest corner, while the other will be
on the southeast corner.

The project will have an overall disturbance of 2.832 acres, which
consist of a 2,500 square foot building, a gravel parking lot, concrete
sidewalks, and approximately 13,800 linear feet of
telecommunications fiber. The trenching located outside of the
building site will receive permanent seeding only and will meet Fort
Bragg Seeding specifications. Sediment fence will be located on the
low side of the trench area and the excavated soil will be placed on
the high side.

3-2
FOUO

Design Narrative
Dining Facility, SOTF
FOUO
J-1
Appendix A

Civil Calculations and NRCS Soils

3-2
Army LID Planning and Cost Tool Report
Date 5/4/2018
Army Installation Fort Bragg
Master Planner
Project name Telecom Reliability Facility P
Project description
Project Area or Built Upon Area required by
NC DEQ only. Full site includes utility
Project limit of disturbance (ac) 0.664
95% rainfall depth (in)1.8
Soil type Sandy
Hydrologic Soil Group (HSG) A
Pre-project curve number (CN) 36
Post-project curve number (CN)55
User Name Dan Saltsman
PROJECT INFO SITE INFO AND EISA VOLUME
REQUIREMENT
Pre-project runoff volume (cf)0
Post-project runoff volume (cf) 8
LID PLANNING SUMMARY
Bioretention:
Swale:
Permeable Pavement:
Rainwater Harvesting:
Green Roof:
Infiltration Practice: 305
Veg. Filter Strip (Slope >2%, Short Grass): 0.00
Veg. Filter Strip (Slope >2%, Tall Grass):0.00
Veg. Filter Strip (Slope <2%, Short Grass):0.00
Veg. Filter Strip (Slope <2%, Tall Grass): 0.00
Reforestation (Trees - Short Grass): 0.00
Reforestation (Trees - Shrubs and Tall Grass):0.00
Structural BMP Non-structural BMP Surface
area (ac)
Surface area
(sf)
Runoff volume
retained (cf)
0
0
0
0
0
365
Total retention volume provided by BMPs (cf):365
EISA Section 438 retention volume
requirement (cf)
8
LID COST SUMMARY
Project complies with EISA Section 438.
Army Command IMCOM
Army LID Planning ToolSimplified runoff curve number method for planning level selection and sizing of LID practices, to comply with the runoff volume control requirement of EISA Section 438. Date:5/4/2018Master Planner:Project Name:Telecom Reliability FaciAcre-feet0.000Cubic feet:8Gallons58Minimum runoff retention volume to comply with EISA 438 volume control requirement:Retention volume provided by BMPs (cubic feet):365Your Name:Dan SaltsmanGo to project:Telecom Reliability Facility PN81894DD1391 Project No.:Wooded (poor):00Wooded (fair):00Wooded (good):0.210Meadow:0.4540.486Brush and weeds (poor):00Brush and weeds (fair):00Brush and weeds (good):00Lawn:00Roads and drives (w/o C and G):00Roads and drives (w/ C and G):00Parking, driveways and sidewalks:00.134Building roof:00.044Bare soil:00Trees - grassy (poor):00Trees - grassy (fair):00Trees - grassy (good):00Open space (lawns, parks, cem.) <50% grass:00Open space (lawns, parks, cem.) <75% grass:00Open space (lawns, parks, cem.) >75% grass:00Gravel road:00Dirt road:00Veg. Filter Strip (Slope >2%, Short Grass):0Veg. Filter Strip (Slope >2%, Tall Grass):0Veg. Filter Strip (Slope <2%, Short Grass):0Veg. Filter Strip (Slope <2%, Tall Grass):0Reforestation (Trees - Short Grass):0Reforestation (Trees - Shrubs and Tall Grass):0Site CN:36 5500Acre-feet:0.000 0.000 0.00031.6 030Gallons:05868.4 73.2 5839Cubic feet:0800 848CFS:0.00 0.000 0 0.003500308 cubic feet is the EISA runoff volume required to be retained on site.004900830098020.29806.6398007700570043003200680049003900760072500450400350450350Total limit of disturbance (acres):0.6640.664Next Step: Choose BMPs0045CN36Pre-project area in acresPercentage of sitePost-project area in acresPercentage of siteRunoff volume calculationsPre-project Post-projectNon-Structural BMPTo calculate the EISA runoff requirement enter the pre- and post-project land use in acresLAND USELand UseProposed non-structural BMPs are accounted for by adjusting the post-project land use area.CNPost-project area in acresPercentage of siteLand UseDifferenceThe runoff volume difference between pre- and post-project is the EISA volume required to be retained on site. Note: If the runoff difference is a negative number, the post-project volume is reduced from the pre-project condition and no additional retention volume is required.
Army LID Planning ToolSimplified runoff curve number method for planning level selection and sizing of LID practices, to comply with the runoff volume control requirement of EISA Section 438. Date:5/4/2018Master Planner:Project Name:Telecom Reliability FaciAcre-feet0.000Cubic feet:8Gallons58Minimum runoff retention volume to comply with EISA 438 volume control requirement:Retention volume provided by BMPs (cubic feet):365Your Name:Dan SaltsmanGo to project:DD1391 Project No.:Enter the total area of proposed infiltration practices.Infiltration rate for site soil type (inches/day14.343Potential infiltration volume:365Infiltration bed area (square feet)305Infiltration bed depth (feet)5(Recommended range: 5 to 10 feet)Stone drainage layer void ratio (default value is 0.40.40Stone volume (cubic feet)1525Runoff volume storage (cubic feet)610Estimated runoff retention volume (cubic feet365
EISA DESIGN STORM
Runoff curve number and runoff volume
Project PN 81894 Telecommunications Reliability Facility By: DLS Date: 5/4/2018
Location SWM Infiltration Trench #1 (DA ID 700) Checked: Date:
1. Runoff curve number (CN)
Soil Name Hyd. Group Cover Description CN* Area Product
(cover type, treatment, and hydrologic
condition; percent impervious;
unconnected / connected impervious
area ratio )Table 2-2Figure 2-3Figure 2-4SF x
of CN x
Area
CaB, Candor Sand A Impervious-Proposed 98 3791 371518.00
CaB, Candor Sand A Lawn 49 5604 274596.00
Totals = 9395 646114.00
CN (weighted) = total product / total area = 68.77211 ; Use CN = 69
NCDEQ SA Check
*Bed Area (SF) 131 57 = *SA = DV*FS
Bed Depth (FT) 4.67 || K*T (where K is in ft/Hr)
Void Ratio 0.4 OK K 0.12
Stone volume (CF) 612 T 72 (drawdown time, hours)
**Runoff Volume (CF) 245 FS 2 (factor of safety)
EISA Infiltration rate (inches/day) 14.343 **DV 245 (design volume = physical volume)
Estimated Runoff Ret. Vol. (CF)157 DVact 565.92 (design volume =3 day MDC)
2. Runoff
Storm #1
Frequency yr EISA
Rainfall, P (24-hour) in 1.8
Runoff, Q in 0.15
(Use P and CN with table 2-1, fig. 2-1, or eqs. 2-3 and 2-4.)
Volume Required (CF)= 115
Volume Provided (CF)= 157
EISA DESIGN STORM
Runoff curve number and runoff volume
Project PN 81894 Telecommunications Reliability Facility By: DLS Date: 5/4/2018
Location SWM Infiltration Trench #2 Checked: Date:
Mark one: Present Developed x
1. Runoff curve number (CN)
Soil Name Hyd. Group Cover Description CN* Area Product
(cover type, treatment, and hydrologic
condition; percent impervious;
unconnected / connected impervious
area ratio )Table 2-2Figure 2-3Figure 2-4SF x
of CN x
Area
CaB, Candor Sand A Impervious-Proposed 98 2720 266560.00
CaB, Candor Sand A Lawn 49 3044 149156.00
Totals = 5764 415716.00
CN (weighted) = total product / total area = 72.12283 ; Use CN = 72
NCDEQ SA Check
*Bed Area (SF) 174 75 = *SA = DV*FS
Bed Depth (FT) 4.67 || K*T (where K is in ft/Hr)
Void Ratio 0.4 OK K 0.12 ft/hr
Stone volume (CF) 813 T 72 (drawdown time, hours)
**Runoff Volume (CF) 325 FS 2 (factor of safety)
Infiltration rate (inches/day) 14.343 **DV 325 (design volume = physical volume)
Estimated Runoff Ret. Vol. (CF) 208 DVact 751.68 (design volume = 3 day MDC)
2. Runoff
Storm #1
Frequency yr EISA
Rainfall, P (24-hour) in 1.8
Runoff, Q in 0.22
(Use P and CN with table 2-1, fig. 2-1, or eqs. 2-3 and 2-4.)
Volume Required (CF)= 104
Volume Provided (CF)= 208
1.00
1.44
2.06
3.06
3.70
5.46
6.52
7.38
8.26
Highlighted Storm is Design Storm
0.66 acres 0.18 acres
0.00 acres 27%
0.00 acres
Complete the breakdown of impervious area for the project
Yes
2-yr, 24-hr
Storm Event
10-yr, 24-hr
25-yr, 24-hr(Minimum Design Storm = P90 for non-SA, 1-yr, 24-hr for SA)
Loaded Rainfall:
0
Entire Site
Total Impervious Area
Project % impervious area
ALL AREAS ARE IN SQUARE FEET
100-yr, 24-hr
PROJECT INFORMATION
RAINFALL & CALCULATION DATA
Rainfall Source:
Project County:
Project City:
CUMBERLAND
Fort Bragg
Fort Bragg
Design Storm:
Fort Bragg
1-yr, 24-hr
Telecommunications Reliability Facility
Fort Bragg, NC CUMBERLAND County
Cape Fear River Basin
Depth
(inches)
P90
First Flush / WQV
P90
P95
50-yr, 24-hr
Total Property Area
Total Coastal Wetlands Area
Total Surface Water Area
0
0
Use Worksheet Data?
Total Drainage Area
On-Site Drainage Area (sf)
28,967
28,967
Data in italics is derived from application
forms and land use data worksheets and
cannot be changed by user.
Proposed Impervious Area (sf)
% Impervious Area (total)
0
7,753
27%
On-Site Buildings/Lots (sf)
On-Site Streets (sf)
1,931
0
Other On-Site (sf)
4,261
1,561
0
On-Site Parking (sf)
On-Site Sidewalks (sf)
Future (sf)
Off-site (sf)
Existing BUA (sf)
7,753Total
0
Impervious Surface Area
Offsite Drainage Area (sf)
Stream Index Number
Stream Class
Receiving Stream name
Basin Information Entire Site
NOTE: Please use the Storm-EZ calculation sheets to document the stormwater design
and create the O&M Agreement.
Discrete SCS Method,
Pre - PostCalculation Method
STORM-EZ
Version 1.4 Project Data
9/25/2018
Page 5 of 12
1 of 1
Pre-Development Land Use:
HSG CN %
A 30 31.73%
A 39 68.27%
Note: Enter BUA Draining to
Permeable Pavement Below
HSG
30.0 0.00 0.00%
0.66 0.00%
Existing Permeable Pavement (Infiltration):
Pavement Area Additional BUA
Soil
Infiltratio
n Rate
Gravel Void
Space
Total
Gravel
Depth
Orifice
Dia.
Orifice
Height
(sf) (sf) (in/hr) (%) (in) (in) (in)
100
DSD PAW Dgr
(in) (%) (in) (sf) (acres)
150 1.44 0.00
0.66 acres
0.00 acres
0.00 acres
0.00 acres
0.00 acres
0.66 acres
Pre-Development SCMs:
Imp. Open
(sf) (sf)
(cf) HSG 0 28967
200
Rainfall Volume =0.96 cf
Natural Infiltration & ET =-0.96 cf
Disconnected Impervious Surfaces =0.00 cf
SCM Infiltration =0.00 cf
Permeable Pavement Infiltration =0.00 cf
Green Roof ET =0.00 cf
Post Filtration Discharge =0.00 cf
Total Runoff Reduction =-0.96 cf
Treated SCM Outflow =0.00 cf
Untreated Surface Runoff =0.00 cf
28,967
0
0
-3,476
-3,476
0
0
0
SCM Treatment:
acre-inches =0
The Pre-Development project area contains 0 sf of built upon area, resulting in an overall density of 0%.
0
acre-inches =
acre-inches =
acre-inches =
acre-inches =
acre-inches =
acre-inches =
BUA %
SCM #
SCM #
From Land Use Tables: 28,967
Preserved Surface Waters & Non-Coastal Wetlands :
Runoff Reduction Components:
acre-inches =
3,476acre-inches =
acre-inches =
Design Storm Runoff Fate Summary:
28,967
Subtotal:
Telecommunications Reliability Facility
(acres)
0.45Pasture or Open Space
Woods 9,191
19,776
Fort Bragg, NC CUMBERLAND County
Cape Fear River Basin
PRE-DEVELOPMENT LAND USE CALCULATIONS
Drainage Area #
(sf)Land-use
0.21
Area
User Defined Drainage Areas:Comp.
CNDescription
Area
(ac.)Area (sf.)
Subtotal:
Area (sf.)
WQ Volume
Provided
% Imp
Drainage Area
28,967 0.66
0
Downstream
SCM
Description
Total Site Area:
Land Use Summary:
Description
Preserved Coastal Wetlands :
NotesSCM #
Area DS SCM #
Has Synthetic
Liner?
Permeable Pavement + Additional BUA:
Green Roofs :
0
Existing Green Roofs:
HSG
SCM Type
D.S.
BMP
STORM-EZ
Version 1.4 Pre-Development
9/25/2018
Page 6 of 12
1 of 1
Permeable Pavement:
Infiltration
Rate Void Space
Total
Gravel
Depth
Orifice
Dia.
Orifice
Height
(sf) (acres) (sf) (acres) (in/hr) (%) (in) (in) (in)
500 0.00 0.00 No
DSD PAW Dgr
(in) (%) (in) (sf) (acres)
600 1.44 0.00 No
Residential Lot CN Calculator (Excluding R/W and dedicated open spaces):
Max Imp / Lot Woods / Lot
(ac.) (sf) (sf)
0.00
Remaining Land Use:
HSG CN (sf) (acres) %
A 39.0 21,214 0.49 73.24%
A 98.0 7,753 0.18 26.76%
N/A 0 0.00 0.00%
N/A 0 0.00 0.00%
28,967 0.66 100.00%
Land Excluded, or Partially Excluded, from Volume Calculations:(sf.) (ac.)
00.00
00.00
28,967 0.66
Rainfall Volume =0.96 cf
Natural Infiltration & ET =-0.74 cf
Disconnected Impervious Surfaces =-0.01 cf
SCM Infiltration =-0.18 cf
Permeable Pavement Infiltration =0.00 cf
Green Roof ET =0.00 cf
Post Filtration Discharge =0.00 cf
Total Runoff Reduction =-0.93 cf
CommentsRetrofit?
Drainage Area #
Down-
stream
SCM
Additional BUA
SCM #
Downstream
SCM #
HSG
Avg Lot Size
Pavement Area
% Imp.(sf.)
Permeable Pavement + BUA:
Sub-Total:
Green Roofs:
# of Lots
Land-Use
Impervious
Lot Area
Open Space (Managed Open Space)
Total Site Area:
Surface Waters & Non-Coastal Wetlands :
Green Roofs :
Coastal Wetlands :
acre-inches =
-663
0
-3,385
Telecommunications Reliability Facility
Fort Bragg, NC CUMBERLAND County
Cape Fear River Basin
Detention
Check
Has
Synthetic
Liner?
Infiltration
Check
POST-DEVELOPMENT LAND USE CALCULATIONS
Pvmt Type
SCM #
Area
Runoff Reduction Components:
Design Storm Runoff Fate Summary:
acre-inches =
acre-inches =
acre-inches =
acre-inches = -2,687
acre-inches =
0
-35
acre-inches =
0
Area
Open Space / Lot
(sf)
3,476
acre-inches =
STORM-EZ
Version 1.4 Post Development
9/25/2018
Page 7 of 12
1 of 1Drainage Area #
Telecommunications Reliability Facility
Fort Bragg, NC CUMBERLAND County
Cape Fear River Basin
POST-DEVELOPMENT LAND USE CALCULATIONS
Treated SCM Outflow =0.00 cf
Untreated Surface Runoff =0.03 cf
Pre-Development Runoff =0.00 cf
Difference =0.03 cf
acre-inches =
acre-inches =0
SCM Treatment:
91
acre-inches =91
acre-inches =0
The Post-Development project area contains 7753 sf of built upon area, resulting in an overall density of 26.76%.
STORM-EZ
Version 1.4 Post Development
9/25/2018
Page 8 of 12
1 of 1
Impervious
(sf)
7,753 (cf) (cf) (cf) (cf) (cf) (cf)
700 SWM INF. TRENCH1 Infiltration Device A 3,791 49% 23%566 386 386 386 0 0 45%
701 SWM INF. TRENCH2 Infiltration Device A 2,720 35% 16%751 277 277 277 0 0 25%
702 Sidewalks/Gravel Disconnected Impervious Type 3 A 535 7% 5%54 54 35 0 0 100%
Rainfall Volume =0.96 acre-inches =cf
Natural Infiltration & ET =-0.74 acre-inches = cf
Disconnected Impervious Area =-0.01 acre-inches = cf
SCM Infiltration =-0.18 acre-inches = cf
Permeable Pavement Infiltration =0.00 acre-inches = cf
Green Roof ET =0.00 acre-inches = cf
Post Filtration Discharge =0.00 acre-inches = cf
Total Runoff Reduction =-0.93 acre-inches =cf
SCM Treatment:
Treated SCM Outflow =0.00 acre-inches =cf
Untreated Surface Runoff =0.03 acre-inches =cf
0.00 acre-inches =cf
0.03 acre-inches =cf
0.01 ac. Impervious Area (7% of total impervious) is disconnected. Net untreated runoff form other impervious area = 72 cf
STORMWATER CONTROL MEASURES
% of SCM
Volume
Utilized
Post
Filtration
Outflow
Treated
Outflow
Type of Device
SCM
# Name / Location
Contributing Area
HSG
4,790
% of Total
Impervious
Area
% of Total
Pervious
Area
Storage
Volume
3,320
Offsite Impervious
Area Treated
Infiltration &
ET
0
1,020
sf
Total
Inflow
Volume
Enter only runoff volume below that will be infiltrated or drawn down over 2 to 5 days. Additional volume provided in devices should not be entered in this worksheet.
Drawdown time requirement applies to all storm events.
Drainage Area #
PROPOSED SIPs & STRUCTURAL RUNOFF VOLUME CONTROLS
Telecommunications Reliability Facility
Fort Bragg, NC CUMBERLAND County
Cape Fear River Basin
0
9130 sf open space entered
compared to 21214 sf total
open space.
Pervious
(sf)
21,214
0
Warnings:
Design Storm Runoff Fate Summary:
The Post-Development project area contains 7753 sf of built upon area, resulting in an overall density of 26.76%.
0
0
**CHECK DESIGN**
Difference =
0 cf of runoff generated by pervious areas. Net untreated runoff = 91 cf. Net 91% of impervious area routed through SCMs.
Pre-Development Runoff =
0
91
91% of total
impervious
area.
43% of total
pervious
area.
Runoff Reduction Components:
-2,687
7046 sf impervious area entered compared
to 7753 sf total impervious.
Down-
stream SCM
#
Drainage
Area Inflow
Volume
91
-3,385
-663
-35
3,476
STORM-EZ
Version 1.4 Stormwater Controls
9/25/2018
Page 9 of 12
1 of 1
Compliance Storm = P90 Storm - Rainfall Depth = 1.44 inches
Drainage Area #
FATE OF RAINFALL
Select Storm:
The"Fate of Rainfall" charts display the hydrologic processes to which rainfall volumes are subjected based on the combinations of land use, soil type, and stormwater controls entered by the user. The charts are designed to display the stormwater
plan in a form which illustrates changes to the hydrologic cycle which result from urbanization and various stormwater management strategies.
Fort Bragg, NC CUMBERLAND County
Cape Fear River Basin
P90
Telecommunications Reliability Facility
P90 Storm - Rainfall Depth = 1.44 inches
VOLUME MATCHING SCALE
Volume Matching Threshold
Basic Treatment Threshold
BASIC TREATMENT SCALE
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Infiltration and ET ‐ 3385 cf Treated Outflow from BMPs ‐ 0 cf Untreated Surface Runoff ‐ 91 cf% of Total Rainfall VolumePost Development Fates
Post Filtration Outflow ‐ 0 cf Other
Infiltration by BMPs ‐ 663 cf Permeable Pavement Infiltration ‐ 0 cf
Disconnected Impervious Infiltration ‐ 35 cf Green Roof Evapotranspiration ‐ 0 cf
Infiltration and ET ‐ 2687 cf
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Infiltration and ET ‐ 3476 cf Treated Outflow from BMPs ‐ 0 cf Untreated Surface Runoff ‐ 0 cf% of Total Rainfall VolumePre Development Fates
Post Filtration Outflow ‐ 0 cf Other
Infiltration by BMPs ‐ 0 cf Permeable Pavement Infiltration ‐ 0 cf
Disconnected Impervious Infiltration ‐ 0 cf Green Roof Evapotranspiration ‐ 0 cf
Infiltration and ET ‐ 3476 cf
FATE OF RAINFALL GRAPHS
STORM-EZ
Version 1.4 Rainfall Fate Graph
9/25/2018
Page 10 of 12
1 of 1
TIME OF CONCENTRATION CALCULATIONS:
Pre-Development
Length (ft) Slope (ft/ft)Tt (hrs)
48 0.064 0.12
102 0.068 0.14
Length (ft) Slope (ft/ft) n-value
Flow Area
(ft2)Tt (hrs)
Channel Flow:
Channel Flow:
Pre-development Tc =15.24 min (Minimum 5 minutes)
Post Development
Length (ft) Slope (ft/ft)Tt (hrs)
30 0.064 0.08
134 0.069 0.01
Length (ft) Slope (ft/ft) n-value
Flow Area
(ft2)Tt (hrs)
Channel Flow:
Channel Flow:
Post-development Tc =5.65 min (Minimum 5 minutes)
ADJUSTED CURVE NUMBER CALCULATIONS:
Pre-Development
F.F. P90 P95 1-Yr 2-Yr 10-Yr 25-Yr 50-Yr 100-Yr
Rainfall (in) = 1.00 1.44 2.06 3.06 3.70 5.46 6.52 7.38 8.26
Q*(in) =0.00 0.00 0.00 0.00 0.00 0.19 0.43 0.68 0.99
CNadj =67 58 49 40 36 36 36 36 36
Post Development
F.F. P90 P95 1-Yr 2-Yr 10-Yr 25-Yr 50-Yr 100-Yr
Rainfall (in) = 1.00 1.44 2.06 3.06 3.70 5.46 6.52 7.38 8.26
Q*(in) =0.02 0.04 0.08 0.11 0.22 0.73 1.22 1.65 2.13
CNadj =74 67 61 50 49 47 48 48 47
PEAK FLOW CALCULATIONS:
F.F. P90 P95 1-Yr 2-Yr 10-Yr 25-Yr 50-Yr 100-Yr
Pre-Development
Q* (in) 0.00 0.00 0.00 0.00 0.00 0.19 0.43 0.68 0.99
qu (csm/in)251.20 251.20 251.20 251.20 251.20 251.20 251.20 251.20 315.79
Q (cfs) 0.00 0.00 0.00 0.00 0.00 0.05 0.11 0.18 0.33
Post Development
Q* (in) 0.02 0.04 0.08 0.11 0.22 0.73 1.22 1.65 2.13
qu (csm/in)367.10 367.10 367.10 367.10 367.10 627.50 758.67 870.87 870.87
Q (cfs) 0.01 0.01 0.03 0.04 0.08 0.48 0.96 1.49 1.93
N/A N/A N/A N/A 22466.3% 872.5% 755.5% 736.6% 491.6%
Paved or Bare Soil
Analysis Area = 0.66 Acres (0.001 sq. miles)
Sheet Flow:
Shallow Flow:
Sheet Flow:
Shallow Flow:
Wetted Perimeter (ft)
Sheet Flow:
Shallow Flow:
**Note: To decrease Post-development peak flows - increase storage volume being drawdown or infiltrated or lengthen post-
Wetted Perimeter (ft)
Sheet Flow: Woods
Surface Cover
Analysis Area = 0.66 Acres (0.001 sq. miles)
Telecommunications Reliability Facility
Fort Bragg, NC CUMBERLAND County
Shallow Flow:
Drainage Area #
Surface Cover
Woods
Grass
Cape Fear River Basin
ADDITIONAL CALCULATIONS
STORM-EZ
Version 1.4 Peak Flow Calcs
9/25/2018
Page 11 of 12
United States
Department of
Agriculture
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
Cumberland
County, North
Carolina
Telecom Reliability (FOUO)
Natural
Resources
Conservation
Service
June 16, 2017
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.nrcs.usda.gov/wps/
portal/nrcs/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=nrcs) or your NRCS State Soil
Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?
cid=nrcs142p2_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
Soil Map.................................................................................................................. 5
Soil Map................................................................................................................6
Legend..................................................................................................................7
Map Unit Legend..................................................................................................8
Map Unit Descriptions.......................................................................................... 8
Cumberland County, North Carolina...............................................................10
BaD—Blaney loamy sand, 8 to 15 percent slopes......................................10
CaB—Candor sand, 1 to 8 percent slopes..................................................11
Soil Information for All Uses...............................................................................13
Soil Properties and Qualities..............................................................................13
Soil Qualities and Features.............................................................................13
Hydrologic Soil Group (Telecom Reliability (FOUO)).................................. 13
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.
5
6
Custom Soil Resource Report
Soil Map
389148038915003891520389154038915603891580389160038916203891640389166038914803891500389152038915403891560389158038916003891620389164038916603891680674880 674900 674920 674940 674960 674980 675000 675020
674880 674900 674920 674940 674960 674980 675000 675020
35° 9' 10'' N 79° 4' 48'' W35° 9' 10'' N79° 4' 42'' W35° 9' 3'' N
79° 4' 48'' W35° 9' 3'' N
79° 4' 42'' WN
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 17N WGS84
0 45 90 180 270
Feet
0 10 20 40 60
Meters
Map Scale: 1:1,000 if printed on A portrait (8.5" x 11") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
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
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Cumberland County, North Carolina
Survey Area Data: Version 17, Sep 19, 2016
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Feb 14, 2011—Mar 3,
2011
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.
Custom Soil Resource Report
7
Map Unit Legend
Cumberland County, North Carolina (NC051)
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
BaD Blaney loamy sand, 8 to 15
percent slopes
0.0 0.1%
CaB Candor sand, 1 to 8 percent
slopes
3.2 99.9%
Totals for Area of Interest 3.2 100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
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
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
Custom Soil Resource Report
8
development of resource plans. If intensive use of small areas is planned, however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha-Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
Custom Soil Resource Report
9
Cumberland County, North Carolina
BaD—Blaney loamy sand, 8 to 15 percent slopes
Map Unit Setting
National map unit symbol: w6z3
Elevation: 160 to 660 feet
Mean annual precipitation: 38 to 52 inches
Mean annual air temperature: 61 to 70 degrees F
Frost-free period: 210 to 245 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Blaney and similar soils: 85 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Blaney
Setting
Landform: Low hills
Landform position (two-dimensional): Shoulder
Landform position (three-dimensional): Crest
Down-slope shape: Convex
Across-slope shape: Convex
Parent material: Sandy and loamy marine deposits
Typical profile
A - 0 to 4 inches: loamy sand
E - 4 to 25 inches: loamy sand
Bt - 25 to 62 inches: sandy clay loam
C - 62 to 80 inches: loamy coarse sand
Properties and qualities
Slope: 8 to 15 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Runoff class: Medium
Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20
to 0.57 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Low (about 4.0 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: C
Ecological site: Loamy Backslope Woodland - PROVISIONAL (F137XY006GA)
Hydric soil rating: No
Custom Soil Resource Report
10
CaB—Candor sand, 1 to 8 percent slopes
Map Unit Setting
National map unit symbol: w6zj
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: Not prime farmland
Map Unit Composition
Candor and similar soils: 80 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Candor
Setting
Landform: 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: Sandy and loamy marine deposits and/or eolian sands
Typical profile
A - 0 to 8 inches: sand
E - 8 to 26 inches: sand
Bt - 26 to 38 inches: loamy sand
E' - 38 to 62 inches: sand
B't - 62 to 80 inches: sandy clay loam
Properties and qualities
Slope: 1 to 8 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Somewhat excessively drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to
high (0.57 to 1.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Very low (about 2.9 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4s
Hydrologic Soil Group: A
Ecological site: Dry Sandy Upland Woodland (F137XY001GA)
Hydric soil rating: No
Custom Soil Resource Report
11
Custom Soil Resource Report
12
Soil Information for All Uses
Soil Properties and Qualities
The Soil Properties and Qualities section includes various soil properties and
qualities displayed as thematic maps with a summary table for the soil map units in
the selected area of interest. A single value or rating for each map unit is generated
by aggregating the interpretive ratings of individual map unit components. This
aggregation process is defined for each property or quality.
Soil Qualities and Features
Soil qualities are behavior and performance attributes that are not directly
measured, but are inferred from observations of dynamic conditions and from soil
properties. Example soil qualities include natural drainage, and frost action. Soil
features are attributes that are not directly part of the soil. Example soil features
include slope and depth to restrictive layer. These features can greatly impact the
use and management of the soil.
Hydrologic Soil Group (Telecom Reliability (FOUO))
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive precipitation
from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly
wet. These consist mainly of deep, well drained to excessively drained sands or
gravelly sands. These soils have a high rate of water transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well drained
soils that have moderately fine texture to moderately coarse texture. These soils
have a moderate rate of water transmission.
13
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of water
transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay layer at
or near the surface, and soils that are shallow over nearly impervious material.
These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in their
natural condition are in group D are assigned to dual classes.
Custom Soil Resource Report
14
15
Custom Soil Resource Report
Map—Hydrologic Soil Group (Telecom Reliability (FOUO))389148038915003891520389154038915603891580389160038916203891640389166038914803891500389152038915403891560389158038916003891620389164038916603891680674880 674900 674920 674940 674960 674980 675000 675020
674880 674900 674920 674940 674960 674980 675000 675020
35° 9' 10'' N 79° 4' 48'' W35° 9' 10'' N79° 4' 42'' W35° 9' 3'' N
79° 4' 48'' W35° 9' 3'' N
79° 4' 42'' WN
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 17N WGS84
0 45 90 180 270
Feet
0 10 20 40 60
Meters
Map Scale: 1:1,000 if printed on A portrait (8.5" x 11") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Rating Polygons
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Lines
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Points
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Cumberland County, North Carolina
Survey Area Data: Version 17, Sep 19, 2016
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Feb 14, 2011—Mar 3,
2011
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.
Custom Soil Resource Report
16
Table—Hydrologic Soil Group (Telecom Reliability (FOUO))
Hydrologic Soil Group— Summary by Map Unit — Cumberland County, North Carolina (NC051)
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
BaD Blaney loamy sand, 8 to
15 percent slopes
C 0.0 0.1%
CaB Candor sand, 1 to 8
percent slopes
A 3.2 99.9%
Totals for Area of Interest 3.2 100.0%
Rating Options—Hydrologic Soil Group (Telecom Reliability
(FOUO))
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Higher
Custom Soil Resource Report
17