SW3230803_Soils/Geotechnical Report_20230829 (2)

Hydrologic Soil Group—Union County,North Carolina
(2022-08-02_19076 SCM DA SHAPEFILE)
528900 529003 529100 529200 529300 529400 529500 529600 529700 529800 529900 530000
35°1'4"N 35°1'4"N
ja
`.1 11 .-0-11411 .._ cif ■ 93'-..1-
4: Bd€2
. .
BdC2 "'\ a -
TbB2 "
, /
n
fD N
22
0. 4- - .- • /21. 0.
A ,, , 74..
.. BdB2,... t, '‘.\Alit ,.
1� �4 CmB;y
Q q g
,r Ra;
1q40 Gd-.4p r LI�_, ,'da011 7 a11 i(2 ',,',20 itibilisiii: li r
35°0'39"N N 1 35°0'39"N
528900 529000 529100 529200 529300 529400 529500 529600 529700 529800 529900 530000
3 3
a Map Scale:1:5,580 if printed on A landscape(11"x 8.5")sheet.
Meters 0
° N 0 50 100 200 300 8
Feet
0 250 500 m 1000UM1500
Map projection:Web Mercator Coer coordinates:WG584 Edge tics:U Zone 17N WGS84
USDA Natural Resources Web Soil Survey 8/02/2022
Conservation Service National Cooperative Soil Survey Page 1 of 4

Hydrologic Soil Group—Union County,North Carolina
(2022-08-02_19076 SCM DA SHAPEFILE)
MAP LEGEND MAP INFORMATION
Area of Interest(AOI) p c The soil surveys that comprise your AOI were mapped at
Area of Interest(AOI) 1:24,000.
0 CID
Soils • D Warning:Soil Map may not be valid at this scale.
Soil Rating Polygons
0 A p Not rated or not available Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
n A/D Water Features line placement.The maps do not show the small areas of
Streams and Canals contrasting soils that could have been shown at a more detailed
n B scale.
Transportation
Q B/D
r4-1. Rails Please rely on the bar scale on each map sheet for map
n C measurements.
ti Interstate Highways
n CID US Routes Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
0 D Major Roads Coordinate System: Web Mercator(EPSG:3857)
n Not rated or not available Local Roads
Maps from the Web Soil Survey are based on the Web Mercator
Soil Rating Lines Background projection,which preserves direction and shape but distorts
• • A distance and area.A projection that preserves area,such as the
1111 Aerial Photography Albers equal-area conic projection,should be used if more
• • A/D accurate calculations of distance or area are required.
^r B This product is generated from the USDA-NRCS certified data as
.v B/D of the version date(s)listed below.
• r C Soil Survey Area: Union County, North Carolina
Survey Area Data: Version 22,Jan 21,2022
• • CID
Soil map units are labeled(as space allows)for map scales
• • D 1:50,000 or larger.
• w Not rated or not available Date(s)aerial images were photographed: Nov 16,2020—May
Soil Rating Points 10,2022
p A The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
O A/D imagery displayed on these maps.As a result,some minor
• B shifting of map unit boundaries may be evident.
• B/D
USDA Natural Resources Web Soil Survey 8/02/2022
Conservation Service National Cooperative Soil Survey Page 2 of 4

Hydrologic Soil Group—Union County, North Carolina 2022-08-0219076 SCM DA
SHAPEFILE
Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
BdB2 Badin channery silty C 11.8 37.8%
clay loam,2 to 8
percent slopes,
moderately eroded
BdC2 Badin channery silty C 0.3 0.9%
clay loam,8 to 15
percent slopes,
moderately eroded
CmB Cid channery silt loam, 1 D 1.4 4.5%
to 5 percent slopes
TbB2 Tarrus gravelly silty clay B 17.8 56.8%
loam,2 to 8 percent
slopes,moderately
eroded
Totals for Area of Interest 31.3 100.0%
USDA Natural Resources Web Soil Survey 8/02/2022
1111-1. Conservation Service National Cooperative Soil Survey Page 3 of 4

Hydrologic Soil Group—Union County, North Carolina 2022-08-02_19076 SCM DA
SHAPEFILE
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 8/02/2022
Conservation Service National Cooperative Soil Survey Page 4 of 4