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J USDA Natural Resources Web Soil Survey 4/19/2010
an Conservation Service National Cooperative Soil Survey Page 1 of 4
• S
Hydrologic Soil Group-Weld County,Colorado,Southern Part
(Lot A RE-828)
MAP LEGEND MAP INFORMATION
Area of Interest(AOl) Map Scale: 1:2,390 if printed on A size(8.5"x 11')sheet.
Area of Interest(AOI) The soil surveys that comprise your AOI were mapped at 1:24,000.
Soils Please rely on the bar scale on each map sheet for accurate map
Soil Map Units measurements.
Soil Ratings Source of Map: Natural Resources Conservation Service
LI A Web Soil Survey URL: http://websoilsurvey.nres.usda.gov
0 ND Coordinate System: UTM Zone 13N NAD83
B This product is generated from the USDA-NRCS certified data as of
the version date(s)listed below.
n B/D
Soil Survey Area: Weld County,Colorado,Southern Part
n C Survey Area Data: Version 11,Aug 27,2009
Q C/D Date(s)aerial images were photographed: 7/29/2005
0 The orthophoto or other base map on which the soil lines were
Not rated or not available compiled and digitized probably differs from the background
imagery displayed on these maps.As a result,some minor shifting
Political Features of map unit boundaries may be evident.
O Cities
Water Features
Oceans
Streams and Canals
Transportation
i-r+ Rails
ow Interstate Highways
US Routes
Major Roads
Local Roads
USDA Natural Resources Web Soil Survey 4/19/2010
Conservation Service National Cooperative Soil Survey Page 2 of 4
Hydrologic Soil Group—Weld County,Colorado,Southern Part Lot A RE-828
• Hydrologic Soil Group
Hydrologic Soil Group—Summary by Map Unit—Weld County,Colorado,Southern Part
Map unit symbol Map unit name Rating I Acres in AOI I Percent of AOI
•35 Loup-Boel loamy sands,0 to••D 2.5 12.1%'
3 percent slopes
47 Olney fine sandy loam, 1 to B 10.0 47.6%'
3 percent slopes
48 Olney fine sandy loam,3 to B - 8.5 40.3%
5 percent slopes
Totals for Area of Interest 21.0 100.0%
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 (ND, 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(ND, 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.
*iii Natural Resources Web Soil Survey 4/19/2010
Conservation Service National Cooperative Soil Survey Page 3 of 4
Hydrologic Soil Group—Weld County,Colorado,Southern Part Lot A RE-828
• Rating Options
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Lower
•eJSDA Natural Resources Web Soil Survey 4/19/2010
Conservation Service National Cooperative Soil Survey Page 4 of 4
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