SW5231001_USGS Topographic Site Map_20231008

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USGS The National Map: National Boundaries Dataset,
3DEP Elevation Program, Geographic Names
Information System, National Hydrography Dataset,
National Land Cover Database, National Structures
USGS
2021 USGS

a Hydrologic Soil Group—Wake County,North Carolina
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699100 699200 609300 699400 699500 699600 699700 699800 699900 700000 700100 700200
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,r Map Scale:1:5,360 if printed on B portrait(11"x 17")sheet
Meters
N 0 50 100 200 300
Feet
A
0 250 500 co 1000 1500
Map projection:Web Mercator Corner ordinates:WG584 Edge tics:UTM Zone 17N WG584
USDA Natural Resources Web Soil Survey 3/31/2023
Conservation Service National Cooperative Soil Survey Page 1 of 4

Hydrologic Soil Group—Wake County, North Carolina
(RDU PE3 Parking Lot Expansion)
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 C/D
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
Rails Please rely on the bar scale on each map sheet for map
n C measurements.
ti Interstate Highways
C/D 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: Wake County, North Carolina
Survey Area Data: Version 23,Sep 12,2022
• • C/D
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: Apr 24,2022—May
Soil Rating Points 9,2022
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 3/31/2023
Conservation Service National Cooperative Soil Survey Page 2 of 4

Hydrologic Soil Group—Wake County, North Carolina RDU PE3 Parking Lot Expansion
Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
ChA Chewacla and B/D 7.8 3.9%
Wehadkee soils,0 to
2 percent slopes,
frequently flooded
CrB Creedmoor-Green Level C/D 31.1 15.4%
complex,2 to 6
percent slopes
CrC Creedmoor-Green Level C/D 9.5 4.7%
complex,6 to 10
percent slopes
CrD Creedmoor-Green Level C/D 77.8 38.6%
complex, 10 to 15
percent slopes
PkF Pinoka gravelly fine B 20.5 10.2%
sandy loam, 15 to 30
percent slopes
UdE Udorthents loamy,0 to C 4.2 2.1%
25 percent slopes
Ur Urban land 50.3 24.9%
W Water 0.5 0.2%
Totals for Area of Interest 201.7 100.0%
USDA Natural Resources Web Soil Survey 3/31/2023
Conservation Service National Cooperative Soil Survey Page 3 of 4

Hydrologic Soil Group—Wake County,North Carolina RDU PE3 Parking Lot Expansion
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 3/31/2023
Conservation Service National Cooperative Soil Survey Page 4 of 4