SW3220306_Soils/Geotechnical Report_20220330

Hydrologic Soil Group —Union County, North Carolina
(Forest Creek)
g 520600 521000 521400 521800 522200 522600 523000 523400 523800 524200 524600 525000
34o 55' 29" N -q �,. s I_ I ;I_ I, I 34o 55' 29" N
A� R
I'
F p
8
cod
34o 53' 53" N 34o 53' 53" N
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520630 521000 521400 521800 522200 522600 523000 523400 523800 524200 524600 525000
m -
Map Scale: 1:20,700 if printed on A landscape (11" x 8.5") sheet. a
Meters
$ N 0 300 E00 1200 1�0 $
Feet
0 1000 2000 4000 E000
Map projection: Web Mercator Conermordinates: WGS84 Edge tics: lfrM Zone 17N WGS84
usoA Natural Resources Web Soil Survey 3/10/2021
Conservation Service National Cooperative Soil Survey Pagel of 4

Hydrologic Soil Group —Union County, North Carolina
(Forest Creek)
MAP LEGEND
Area of Interest (AOI)
0
Area of Interest (AOI)
Soils
Soil Rating
Polygons
0
A
0
A/D
0
B
0
B/D
C
0
C/D
0
D
0
Not rated or not available
Soil Rating
Lines
r 0
A
r 0
A/D
B
B/D
N 0
C
r 0
C/D
r 0
D
r 0
Not rated or not available
Soil Rating
Points
0
A
0
A/D
B
S
B/D
❑ C
0 C/D
0 D
❑ Not rated or not available
Water Features
Streams and Canals
Transportation
— Rails
­0 Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
MAP INFORMATION
The soil surveys that comprise your AOI were mapped at
1:24,000.
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: Union County, North Carolina
Survey Area Data: Version 20, Jun 3, 2020
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jul 18, 2011—Nov
25, 2017
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.
usoA Natural Resources Web Soil Survey 3/10/2021
Conservation Service National Cooperative Soil Survey Page 2 of 4

Hydrologic Soil Group -Union County, North Carolina
Forest Creek
Hydrologic Soil Group
Map unit symbol
Map unit name
Rating
Acres in AOI
Percent of AOI
AeB
Ailey-Appling complex, 2
A
181.1
10.0%
to 8 percent slopes
AgC
Ailey-Appling complex, 8
A
17.3
1.0%
to 15 percent slopes,
bouldery
CeB2
Cecil gravelly sandy clay
B
549.1
30.3%
loam, 2 to 8 percent
slopes, moderately
eroded
CeC2
Cecil gravelly sandy clay
B
251.7
13.9%
loam, 8 to 15 percent
slopes, moderately
eroded
ChA
Chewacla silt loam, 0 to
B/D
67.5
3.7%
2 percent slopes,
frequently flooded
GeB
Georgeville silt loam, 2
B
7.2
0.4%
to 8 percent slopes
GfB2
Georgeville silty clay
B
176.0
9.7%
loam, 2 to 8 percent
slopes, moderately
eroded
IrA
Iredell loam, 0 to 3
C/D
4.6
0.3%
percent slopes
PaE2
Pacolet sandy clay
B
68.0
3.7%
loam, 15 to 40 percent
slopes, moderately
eroded
PgC
Pacolet-Gullied land
B
20.5
1.1 %
complex, 4 to 15
percent slopes
ScA
Secrest-Cid complex, 0
C
3.8
0.2%
to 3 percent slopes
TbB2
Tarrus gravelly silty clay
B
9.4
0.5%
loam, 2 to 8 percent
slopes, moderately
eroded
TbC2
Tarrus gravelly silty clay
B
319.0
17.6%
loam, 8 to 15 percent
slopes, moderately
eroded
TuB
Tarrus-Urban land
B
122.8
6.8%
complex, 2 to 8
percent slopes
W
Water
3.6
0.2%
WyB
Wynott gravelly loam, 2
D
11.3
0.6%
to 8 percent slopes
USDA Natural Resources Web Soil Survey 3/10/2021
Conservation Service National Cooperative Soil Survey Page 3 of 4

Hydrologic Soil Group —Union County, North Carolina
Forest Creek
Map unit symbol
Map unit name
Rating
Acres in AOI
Percent of AOI
Totals for Area of Interest
1,812.8
100.0%
Description
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.
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.
Rating Options
Aggregation Method: Dominant Condition
Component Percent Cutoff.- None Specified
Tie -break Rule: Higher
USDA Natural Resources Web Soil Survey 3/10/2021
Conservation Service National Cooperative Soil Survey Page 4 of 4