HomeMy WebLinkAbout20202494.tiff Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map , and a description of each soil map unit.
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Custom Soil Resource Report
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MAP LEGEND MAP INFORMATION
Area of Interest (AOl) _ Spoil Area The soil surveys that comprise your AOI were mapped at
Area of Interest (AO!) 1 :24,000.
Stony Spot
Soils
Very Stony SpotLI may Soil Map Unit Polygons Warning : Soil Map not be valid at this scale .
ritt: Wet Spot
r or Soil Map Unit Lines
Enlargement of maps beyond the scale of mapping can cause
Other misunderstanding of the detail of mapping and accuracy of soil
® Soil Map Unit Points
Special Line Features line placement. The maps do not show the small areas of
Special Point Features contrasting soils that could have been shown at a more detailed
t Blowout Water Features scale.
Streams and Canals
Borrow Pit
Transportation Please rely on the bar scale on each map sheet for map
Clay Spot Rails measurements.
Closed Depression Interstate Highways
Source of Map: Natural Resources Conservation Service
Gravel Pit
US Routes Web Soil Survey URL:
Gravelly Spot Coordinate System : Web Mercator (EPSG :3857)
Major Roads
Landfill Local Roads Maps from the Web Soil Survey are based on the Web Mercator
Lava Flow projection, which preserves direction and shape but distorts
Background
distance and area. A projection that preserves area, such as the
Marsh or swamp Aerial Photography Albers equal-area conic projection, should be used if more
Mine or quarry accurate calculations of distance or area are required.
Miscellaneous Water This product is generated from the USDA-N RCS certified data as
Perennial Water the version dates)) listed below.
v. Rock Outcrop Soil Survey Area: Weld County, Colorado, Southern Part
E �
Saline Spot Survey Area Data: Version 18, Sep 13, 2019
o o Sandy Spot
9 0 Soil map units are labeled (as space allows) for map scales
O Severely Eroded Spot 1 :50,000 or larger.
Sinkhole Date(s) aerial images were photographed : Sep 2072015—Oct
Slide orSlip 21 , 2017
for Sodic Spot 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.
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Map Unit Legend
Map Unit Symbol Map Unit Name Acres in Aol Percent of Aol
1 Altvan loam, 0 to 1 percent 2 .7 1 .4%
slopes
3 Aquolls and Aquents, gravelly 142 .4 75 . 1 %
substratum
4 Aquolls and Aquepts, flooded 0 .0 0 .0%
27 Heldt silty clay, 1 to 3 percent 38 .6 20 .4%
slopes
61 Tassel fine sandy loam, 5 to 20 1 . 1 0 .6%
percent slopes
85 Water 4 .9 2 .6%
Totals for Area of Interest 189.7 100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area . The map unit descriptions , along
with the maps , can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas . A map unit is identified and named
according to the taxonomic classification of the dominant soils . Within a taxonomic
class there are precisely defined limits for the properties of the soils . On the
landscape , however, the soils are natural phenomena , and they have the
characteristic variability of all natural phenomena . Thus , the range of some
observed properties may extend beyond the limits defined for a taxonomic class .
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils .
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting , or similar, components . They may or may not be mentioned in a
particular map unit description . Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting , or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used . Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps . If included in the database for a
given area , the contrasting minor components are identified in the map unit
descriptions along with some characteristics of each . A few areas of minor
components may not have been observed , and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
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was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape .
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements . The
delineation of such segments on the map provides sufficient information for the
development of resource plans . If intensive use of small areas is planned , however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas .
An identifying symbol precedes the map unit name in the map unit descriptions .
Each description includes general facts about the unit and gives important soil
properties and qualities .
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition , thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope , stoniness ,
salinity, degree of erosion , and other characteristics that affect their use. On the
basis of such differences , a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series . The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam , 0 to 2 percent slopes, is a phase of the Alpha series .
Some map units are made up of two or more major soils or miscellaneous areas .
These map units are complexes , associations , or undifferentiated groups .
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps .
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas . Alpha-Beta complex, 0 to 6 percent slopes , is an example .
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps . Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha- Beta association , 0 to 2 percent slopes , is an example .
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform . An area can
be made up of only one of the major soils or miscellaneous areas , or it can be made
up of all of them . Alpha and Beta soils , 0 to 2 percent slopes , is an example .
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation . Rock outcrop is an example .
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Custom Soil Resource Report
Weld County, Colorado , southern Part
1--Altvan loam, 0 to 1 percent slopes
Map Unit Setting
National map unit symbol: 3 61 j
Elevation: 4,500 to 4, 900 feet
Mean annual precipitation: 14 to 16 inches
Mean annual air temperature: 46 to 48 degrees F
Frost-free period: 130 to 150 days
Farmland classification: Not prime farmland
Map Unit Composition
Altvan and similar soils: 90 percent
Minor components: 10 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Altvan
Setting
Landform: Terraces
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Old alluvium
Typical profile
H1 - 0 to 10 inches: loam
H2 - 10 to 25 inches: clay loam
H - 25 to 60 inches: gravelly sand
Properties and qualities
Slope: 0 to 1 percent
Depth to restrictive feature.- More than 80 inches
Natural drainage class: Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to
high (0 .20 to 2 . 00 in/hi)
Depth to water table: More than 80 inches
Frequency of flooding►: None
Frequency of pending: None
Calcium carbonate, maximum in profile : 5 percent
Available water storage in profile: Low (about 5 . 7 inches )
Interpretive groups
Land capability classification (irrigated): 35
Land capability classification (nonirrigated): 4e
Hydrologic Soil Group: B
Ecological site: Loamy Plains (R067BY002CO)
Hydric soil rating: No
Minor Components
Cascajo.
Percent of map unit: 9 percent
Hydric soil rating: No
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Aquic haplustolls
Percent of map unit: 1 percent
Landform: Swales
Hydric soil rating: Yes
3—Aquolls and Aquents , gravelly substratum
Map Unit Setting
National map unit symbol: 3627
Elevation: 4,000 to 7,200 feet
Mean annual precipitation: 12 to 18 inches
Mean annual air temperature: 45 to 55 degrees F
Frost-free period: 80 to 155 days
Farmland classification: Prime farmland if drained and either protected from flooding
or not frequently flooded during the growing season
Map Unit Composition
Aquolls and similar soils: 55 percent
Aquents, gravelly substratum, and similar soils: 30 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transepts of the mapunit.
Description of Aquolls
Setting
Landform: Swales, streams , flood plains
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Recent alluvium
Typical profile
0 to 48 inches: loam
H2 - 48 to 60 inches: gravelly sand
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature : More than 80 inches
Natural drainage class: Poorly drained
Runoff class: Low
Capacity of the most limiting layer to transmit water '` sat): Moderately high to
high (0 .20 to 2 . 00 inlhr)
Depth to water table: About 6 to 48 inches
Frequency of flooding: Frequent
Frequency of ponding: None
Salinity., maximum in profile: Nonsaline to slightly saline (0. 0 to 4 .0 mmhoslcm)
Available water storage in profile: Moderate (about 8 .0 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (non irrigated): 6w
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Hydrologic Soil Group: D
Ecological site: Salt Meadow ( R067BY035CO)
Hydric soil rating: Yes
Description of Aquents, Gravelly Substratum
Setting
Landform: Stream terraces
Down-slope shape: Linear
Across-slope shape : Linear
Parent material: Recent alluvium
Typical profile
I - 0 to 48 inches: variable
H2 - 48 to 60 inches: very gravelly sand
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature : More than 80 inches
Natural drainage class: Poorly drained
Runoff class: Very high
Capacity of the most limiting layer to transmit water (Ksat) : Moderately high to
very high (0. 57 to 19 . 98 inlhr)
Depth to water table: About 6 to 24 inches
Frequency of flooding: Frequent
Frequency of ponding: None
Calcium carbonate, maximum in profile : 10 percent
Salinity, maximum in profile: Nonsaline to moderately saline (0 . 0 to 8 . 0
mmhoslcm)
Available water storage in profile: Moderate (about 6 .6 inches)
Interpretive groups
Land capability classification ('irrigated): 6w
Land capability classification (non irrigated): 6w
Hydrologic Soil Group: D
Ecological site: Salt Meadow ( R067BY035CO)
Hydric soil rating: Yes
Minor Components
Bankard
Percent of map unit: 10 percent
Hydric soil rating: No
U sti c torrif luvents
Percent of map unit: 5 percent
Hydric soil rating: No
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4—Aquolls and Aquepts , flooded
Map Unit Setting
National map unit symbol: 3621
Elevation: 3, 600 to 4,700 feet
Mean annual precipitation: 12 to 16 inches
Mean annual air temperature: 50 to 55 degrees F
Frost-free period: 100 to 165 days
Farmland classification: Prime farmland if drained and either protected from flooding
or not frequently flooded during the growing season
Map Unit Composition
Aquolls and similar soils: 55 percent
Aquepts, flooded, and similar soils: 25 percent
Minor components: 20 percent
Estimates are based on observations, descriptions, and transepts of the mapunit.
Description of Aquolls
Setting
Landform: Drainageways , plains, depressions
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Recent alluvium
Typical profile
HI - 0 to 8 inches: variable
H2 - 8 to 60 inches: stratified sandy loam to clay
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature : More than 80 inches
Natural drainage class: Poorly drained
Runoff class: Very low
Capacity of the most limiting layer to transmit water ' sat,) : Moderately low to high
(0 .06 to 6. 00 inihr)
Depth to water table: About 6 to 36 inches
Frequency of flooding: Frequent
Frequency of ponding: None
Calcium carbonate, maximum in profile: 10 percent
Salinity, maximum in profile : Moderately saline to strongly saline (8 .0 to 16 .0
mmhoslcm )
Sodium adsorption ratio, maximum in profile: 5 . 0
Available water storage in profile: Low (about 4 . 7 inches)
Interpretive groups
Land capability classification (irrigated): 6w
Land capability classification (nonirrigated): 6w
Hydrologic Soil Group: D
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Ecological site: Salt Meadow (R067BY035CO)
Hydric soil rating: Yes
Description of Aquepts, Flooded
Setting
Landform: Stream terraces
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Recent alluvium
Typical profile
Hal - 0 to 8 inches: variable
H2 - 8 to 60 inches: stratified sandy loam to clay
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Poorly drained
Runoff class: Very low
Capacity of the most limiting layer to transmit water (` sat): Moderately low to high
(0 .06 to 6 . 00 in/hr)
Depth to water table: About 6 to 36 inches
Frequency of flooding: Frequent
Fre que ncy of p o ndi,ng: None
Calcium carbonate, maximum in profile: 10 percent
salinity, maximum in profile: Moderately saline to strongly saline (8 . 0 to 16. 0
mmhos/cm)
sodium adsorption ratio, maximum in profile: 5. 0
Available water storage in profile: Low (about 4 . 7 inches)
Interpretive groups
Land capability classification ('irrigated): 6w
Land capability classification (non irrigated): 6w
Hydrologic Soil Group: D
Ecological site: Wet Meadow (R067BY038CO)
Hydric soil rating: Yes
Minor Components
Thedalund
Percent of map unit: 10 percent
Hydric soil rating: No
Haverson
Percent of map unit: 10 percent
Hydric soil rating: No
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Custom Soil Resource Report
27—Heldt silty clay, to 3 percent slopes
Map Unit Setting
National map unit symbol: 3624
Elevation: 4, 950 to 5, 050 feet
Mean annual precipitation: 11 to 17 inches
Mean annual air temperature: 46 to 59 degrees F
Frost-free period: 110 to 150 days
Farmland classification: Prime farmland if irrigated and the product of I (soil
erodibility) x C (climate factor) does not exceed 60
Map Unit Composition
Veldt and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Heldt
Setting
Landform: Plains
Down-slope shape: Linear
Across-slope shape : Linear
Parent material: Sediment alluvium derived from shale
Typical profile
Hi - 0 to 7 inches: silty clay
H2 - 7 to 60 inches: silty clay
Properties and qualities
Slope: 1 to 3 percent
Depth to restrictive feature : More than 80 inches
Natural drainage class: Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat) : Moderately low to
moderately high (0 . 06 to 0 .20 inlhr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile : 10 percent
Gypsum, maximum in profile: 1 percent
salinity, maximum in profile: Nonsaline to slightly saline (0 . 0 to 4 . 0 mmhoslcm)
sodium adsorption ratio, maximum in profile : 10. 0
Available water storage in profile: High (about 9 . 6 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (nonirrigated): 4c
Hydrologic Soil Group:
Ecological site: Clayey Plains (R067BY042CO )
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Custom Soil Resource Report
Hydric soil rating: No
Minor Components
Nunn
Percent of map unit: 10 percent
Hydric soil rating: No
Haverson
Percent of map unit: 5 percent
Hydric soil rating: No
61 Tassel fine sandy loam, 5 to 20 percent slopes
Map Unit Setting
National map unit symbol: 363c
Elevation: 4, 850 to 5,200 feet
Mean annual precipitation: 12 to 19 inches
Mean annual air temperature: 46 to 52 degrees F
Frost-free period: 110 to 165 days
Farmland classification: Not prime farmland
Map Unit. Composition
Tassel and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Tassel
Setting
Landform: Breaks
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Residuum weathered from sandstone
Typical profile
H1 - 0 to 11 inches: fine sandy loam
H2 - 11 to 15 inches: very fine sandy loam
H3 - 15 to 20 inches: weathered bedrock
Properties and qualities
Slope: 5 to 20 percent
Depth to restrictive feature: 10 to 20 inches to paralithic bedrock
Natural drainage class: Well drained
Runoff class: Medium
Capacity of the most limiting layer to transmit water (Ksat) .: Moderately low to
moderately high (0 . 06 to 0 .20 inihr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 10 percent
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Custom Soil Resource Report
Available water storage in profile: Very low (about 2 . 0 inches)
Interpretive groups
Land capability classification (irrigated): 6e
Land capability classification fnonirrigated, : 6e
Hydrologic Soil Group: D
Ecological site: Sandstone Breaks (R067BY056CO)
Hydric soil rating: No
Minor Components
Otero
Percent of map unit: 8 percent
Hydric soil rating: No
Terry
Percent of map unit 7 percent
Hydric soil rating: No
85—Water
Map Unit Composition
Water: 95 percent
Minor components: 5 percent
Estimates are based on observations, descriptions, and transacts of the mapunit.
Minor Components
Aquolls
Percent of map unit: 5 percent
.Land form: Marshes
Hydric soil rating: Yes
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