SW6201101_Hydrologic_Soil_Group_20201130

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Hydrologic Soil Group —Cumberland County, North Carolina
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Map projection: Web Mercator Comer coordinates: WGS84 Edge tics: lfrM Zone 17N WGS84
USDA
Natural Resources
Web Soil Survey
Conservation Service National Cooperative Soil Survey
4/24/2019
Pagel of 4
35° 9' 7' N

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Hydrologic Soil Group —Cumberland County, North Carolina
Hydrologic Soil Group
Map unit symbol
Map unit name
Rating
Acres in AOI
Percent of AOI
BaD
Blaney loamy sand, 8 to
15 percent slopes
C
4.8
17.1 %
CaB
Candor sand, 1 to 8
percent slopes
A
9.1
32.6%
JT
Johnston loam
A/D
0.7
2.6%
NoB
Norfolk loamy sand, 2 to
6 percent slopes
A
13.3
47.7%
Totals for Area of Interest
27.8
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.
USDA Natural Resources Web Soil Survey 4/24/2019
Conservation Service National Cooperative Soil Survey Page 3 of 4

Hydrologic Soil Group —Cumberland County, North Carolina
Rating Options
Aggregation Method: Dominant Condition
Component Percent Cutoff.- None Specified
Tie -break Rule: Higher
USDA Natural Resources Web Soil Survey 4/24/2019
Conservation Service National Cooperative Soil Survey Page 4 of 4