HomeMy WebLinkAbout20242994.tiffUSDA United States
Department of
Agriculture
N
ACS
Natural
Resources
Conservation
Service
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
Weld County,
Colorado, Northern
Part
May 1, 2024
Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/
portal/nrcs/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil
Scientist (http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/?
cid=nrcs142p2_053951).
142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (NRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require
2
alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity
provider and employer.
3
Contents
Preface 2
How Soil Surveys Are Made 5
Soil Map 8
Soil Map 9
Legend 10
Map Unit Legend 11
Map Unit Descriptions 11
Weld County, Colorado, Northern Part 13
4 -Ascalon fine sandy loam, 0 to 6 percent slopes 13
46 Otero sandy loam, 0 to 3 percent slopes 14
Soil Information for All Uses 16
Suitabilities and Limitations for Use 16
Building Site Development 16
Solar Arrays, Ballast Anchor Systems (PS 65 Chad Smith Phase 1
and 2 Solar) 16
Land Classifications 21
Farmland Classification (PS 65 Chad Smith Phase 1 and 2) 22
References 28
4
How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous
areas in a specific area. They include a description of the soils and miscellaneous
areas and their location on the landscape and tables that show soil properties and
limitations affecting various uses. Soil scientists observed the steepness, length,
and shape of the slopes; the general pattern of drainage; the kinds of crops and
native plants; and the kinds of bedrock. They observed and described many soil
profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The
profile extends from the surface down into the unconsolidated material in which the
soil formed or from the surface down to bedrock. The unconsolidated material is
devoid of roots and other living organisms and has not been changed by other
biological activity.
Currently, soils are mapped according to the boundaries of major land resource
areas (MLRAs). MLRAs are geographically associated land resource units that
share common characteristics related to physiography, geology, climate, water
resources, soils, biological resources, and land uses (USDA, 2006). Soil survey
areas typically consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that
is related to the geology, landforms, relief, climate, and natural vegetation of the
area. Each kind of soil and miscellaneous area is associated with a particular kind
of landform or with a segment of the landform. By observing the soils and
miscellaneous areas in the survey area and relating their position to specific
segments of the landform, a soil scientist develops a concept, or model, of how they
were formed. Thus, during mapping, this model enables the soil scientist to predict
with a considerable degree of accuracy the kind of soil or miscellaneous area at a
specific location on the landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented
by an understanding of the soil -vegetation -landscape relationship, are sufficient to
verify predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them
to identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character
of soil properties and the arrangement of horizons within the profile. After the soil
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Custom Soil Resource Report
scientists classified and named the soils in the survey area, they compared the
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that
have similar use and management requirements. Each map unit is defined by a
unique combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components
of the map unit. The presence of minor components in a map unit in no way
diminishes the usefulness or accuracy of the data. The delineation of such
landforms and landform segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, onsite
investigation is needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape,
and experience of the soil scientist. Observations are made to test and refine the
soil -landscape model and predictions and to verify the classification of the soils at
specific locations. Once the soil -landscape model is refined, a significantly smaller
number of measurements of individual soil properties are made and recorded.
These measurements may include field measurements, such as those for color,
depth to bedrock, and texture, and laboratory measurements, such as those for
content of sand, silt, clay, salt, and other components. Properties of each soil
typically vary from one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists
interpret the data from these analyses and tests as well as the field -observed
characteristics and the soil properties to determine the expected behavior of the
soils under different uses. Interpretations for all of the soils are field tested through
observation of the soils in different uses and under different levels of management.
Some interpretations are modified to fit local conditions, and some new
interpretations are developed to meet local needs. Data are assembled from other
sources, such as research information, production records, and field experience of
specialists. For example, data on crop yields under defined levels of management
are assembled from farm records and from field or plot experiments on the same
kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on
such variables as climate and biological activity. Soil conditions are predictable over
long periods of time, but they are not predictable from year to year. For example,
soil scientists can predict with a fairly high degree of accuracy that a given soil will
have a high water table within certain depths in most years, but they cannot predict
that a high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
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Custom Soil Resource Report
identified each as a specific map unit. Aerial photographs show trees, buildings,
fields, roads, and rivers, all of which help in locating boundaries accurately.
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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Soil Map
520200
I I
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Map Scale: 1:6,590 if printed on A landscape (11" x 8.5") sheet
Meters
0 50 100 200 300
520200
520300
520300
Feet
0 300 600 1200 1800
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84
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520400
520500
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520600
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520800
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MAP LEGEND
Area of Interest (AO!)
Area of Interest (AO1)
Soils
C
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
r,
O
0
v
•m 4
4
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
a
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
iair°§1 Aerial Photography
MAP INFORMATION
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Weld County, Colorado, Northern Part
Survey Area Data: Version 18, Aug 24, 2023
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jun 8, 2021 Jun 12,
2021
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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Custom Soil Resource Report
Map Unit Legend
Map
Unit Symbol
Map Unit Name
Acres in AOI
Percent of AOI
4
Ascalon
fine
percent slopes
sandy loam, 0 to 6
59.6
66.0%
46
Otero
sandy loam,
percent slopes
0 to 3
30.7
34.0%
Totals for Area of Interest
90.3
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
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,
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Custom Soil Resource Report
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, Northern Part
4 Ascalon fine sandy loam, 0 to 6 percent slopes
Map Unit Setting
National map unit symbol: 2t1p5
Elevation: 4,550 to 6,050 feet
Mean annual precipitation: 12 to 17 inches
Mean annual air temperature: 46 to 54 degrees F
Frost -free period: 135 to 160 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Ascalon and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Ascalon
Setting
Landform: I me rf l uves
Landform position (two-dimensional): Summit, backslope
Landform position (three-dimensional): Interfluve
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Wind -reworked alluvium and/or calcareous sandy eolian deposits
Typical profile
Ap - 0 to 7 inches: fine sandy loam
Btl - 7 to 13 inches: sandy clay loam
Bt2 - 13 to 18 inches: sandy clay loam
Bk - 18 to 48 inches: sandy loam
C - 48 to 80 inches: sandy loam
Properties and qualities
Slope: 0 to 6 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.60 to 6.00 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 10 percent
Maximum salinity: Nonsaline (0.1 to 1.9 mmhos/cm)
Sodium adsorption ratio, maximum: 1.0
Available water supply, 0 to 60 inches: Moderate (about 6.8 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (non irrigated): 4e
Hydrologic Soil Group: B
Ecological site: R067BY024CO - Sandy Plains
Hydric soil rating: No
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Custom Soil Resource Report
Minor Components
Olnest
Percent of map unit: 8 percent
Landform: I me rf l uves
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down -slope shape: Linear
Across -slope shape: Linear
Ecological site: R067BY024CO - Sandy Plains
Hydric soil rating: No
Otero
Percent of map unit: 7 percent
Landform: ImerfIuves
Landform position (two-dimensional): Footslope
Landform position (three-dimensional): Base slope
Down -slope shape: Linear
Across -slope shape: Linear
Ecological site: R067BY024CO - Sandy Plains
Hydric soil rating: No
46 Otero sandy loam, 0 to 3 percent slopes
Map Unit Setting
National map unit symbol: 3600
Elevation: 4,500 to 5,500 feet
Mean annual precipitation: 12 to 15 inches
Mean annual air temperature: 48 to 52 degrees F
Frost -free period: 130 to 180 days
Farmland classification: Not prime farmland
Map Unit Composition
Otero and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Otero
Setting
Landform: Alluvial fans, plains
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Calcareous loamy alluvium
Typical profile
HI - 0 to 5 inches: sandy loam
H2 - 5 to 60 inches: fine sandy loam
Custom Soil Resource Report
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: Very low
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.57 to 5.95 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 10 percent
Maximum salinity: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm)
Available water supply, 0 to 60 inches: Moderate (about 7.7 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (non irrigated): 4e
Hydrologic Soil Group: A
Ecological site: R067BY024CO - Sandy Plains
Hydric soil rating: No
Minor Components
Stoneham
Percent of map unit: 5
Hydric soil rating: No
Bushman
Percent of map unit: 4
Hydric soil rating: No
Kim
Percent of map unit: 3
Hydric soil rating: No
Mitchell
Percent of map unit: 3
Hydric soil rating: No
percent
percent
percent
percent
Soil Information for All Uses
Suitabilities and Limitations for Use
The Suitabilities and Limitations for Use section includes various soil interpretations
displayed as thematic maps with a summary table for the soil map units in the
selected area of interest. A single value or rating for each map unit is generated by
aggregating the interpretive ratings of individual map unit components. This
aggregation process is defined for each interpretation.
Building Site Development
Building site development interpretations are designed to be used as tools for
evaluating soil suitability and identifying soil limitations for various construction
purposes. As part of the interpretation process, the rating applies to each soil in its
described condition and does not consider present land use. Example
interpretations can include corrosion of concrete and steel, shallow excavations,
dwellings with and without basements, small commercial buildings, local roads and
streets, and lawns and landscaping.
Solar Arrays, Ballast Anchor Systems (PS 65 Chad
Smith Phase 1 and 2 Solar)
ENG - Engineering
Ground -based Solar Arrays, Ballast Anchor Systems
Ground -based solar arrays are sets of photovoltaic panels that are not situated on a
building or pole. These installations consist of a racking system that holds the panel
in the desired orientation and the foundation structures that hold the racking system
to the ground. Two basic methods are used to hold the systems to the ground,
based on site conditions and cost. One method employs driven piles, screw augers,
or concrete piers that penetrate into the soil to provide a stable foundation. The
ease of installation and general site suitability of soil -penetrating anchoring systems
depends on soil characteristics such as rock fragment content, soil depth, soil
strength, soil corrosivity, shrink -swell tendencies, and drainage. The other basic
anchoring system utilizes precast ballasted footings or ballasted trays on the soil
surface to make the arrays too heavy to move. The site considerations that impact
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Custom Soil Resource Report
both basic systems are slope, slope aspect, wind speed, land surface shape,
flooding, and ponding. Other factors that will contribute to the function of a solar
power array include daily hours of sunlight and shading from hills, trees, or
buildings.
Ballast anchor systems can be used in some places where soil -penetrating systems
cannot, such as in shallow or stony soil. Also, since they do not penetrate the soil,
ballast systems can be used where the soil is contaminated and disturbance is to be
avoided. The soil in the area must have sufficient strength to be able to support the
vehicles that haul the ballast and the machinery to install it.
Soils can be a non-member, partial member or complete members of the set of soils
that are limited for "Ground -based Solar Panel Arrays". If a soil's property within 150
cm (60 inches) of the soil surface has a membership indices greater than zero, then
that soil property is limiting and the soil restrictive feature is identified. The overall
interpretive rating assigned is the maximum membership indices of each soil
interpretive property that comprise the "Ground -based Solar Panel Arrays"
interpretive rule. Minor restrictive soil features are identified but not considered as
part of the overall rating process. These restrictive features could be important
factors where the major restrictive features are overcome through design
application.
Soils are placed into interpretive rating classes per their rating indices. These are
not limited (rating index = 0), somewhat limited (rating index greater than 0 and less
than 1.0), or very limited (rating index = 1.0).
Numerical ratings indicate the degree of limitation. The ratings are shown in decimal
fractions ranging from 0.01 to 1.00. They indicate gradations between the point at
which a soil has the least similarity to a good site (1.0) and the point at which the
soil feature is very much like known good sites (0).
The map unit components listed for each map unit in the accompanying Summary
by Map Unit table in Web Soil Survey or the Aggregation Report in Soil Data Viewer
are determined by the aggregation method chosen. An aggregated rating class is
shown for each map unit. The components listed for each map unit are only those
that have the same rating class as listed for the map unit. The percent composition
of each component in a particular map unit is presented to help the user better
understand the percentage of each map unit that has the rating presented.
Other components with different ratings may be present in each map unit. The
ratings for all components, regardless of the map unit aggregated rating, can be
viewed by generating the equivalent report from the Soil Reports tab in Web Soil
Survey or from the Soil Data Mart site. Onsite investigation may be needed to
validate these interpretations and to confirm the identity of the soil on a given site.
References:
Canada, S. 2012. Corrosion impacts on steel piles. Solarpro.
Solarprofessional.com.
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Custom Soil Resource Report
Romanoff, Melvin. 1962. Corrosion of Steel Pilings in Soils. Journal of Research of
the National Bureau of Standards. (Volume 66C, No. 3). July/September, 1962.
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40° 39' 37' N
519700
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519800
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Map Solar Arrays, Ballast Anchor Systems (PS 65 Chad Smith Phase 1 and 2 Solar)
519900
not be valid a
519800
520000
520100
520200
I I I I
519900
520000
520100
Map Scale: 1:6,590 if printed on A landscape (11" x 8.5") sheet
Meters
0 50 100 200 300
520200
520300
520300
Feet
0 300 600 1200 1800
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84
19
520400
520400
520500
520500
520600
520700
I I
520600 520700
520800
520900
521000
104° 45'3'W
520800
520900
521000
1040 45' 3" W
1
S
r-
40° 40' 8" N
40° 39'37'N
Custom Soil Resource Report
MAP LEGEND MAP INFORMATION
Area of Interest (AO!)
Area of Interest (A01)
Soils
Soil Rating Polygons
Very limited
Somewhat limited
Not limited
Not rated or not available
Soil Rating Lines
;t Very limited
Somewhat limited
Not limited
Not rated or not available
Soil Rating Points
Very limited
Somewhat limited
Not limited
Not rated or not available
O
O
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background The soil surveys that comprise your AOI were mapped at
ifrahticAerial Photography
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Weld County, Colorado, Northern Part
Survey Area Data: Version 18, Aug 24, 2023
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jun 8, 2021 Jun 12,
2021
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.
20
Custom Soil Resource Report
Tables Solar Arrays, Ballast Anchor Systems (PS 65 Chad
Smith Phase 1 and 2 Solar)
Map unit
symbol
Map
unit name
Rating
Component
name
(percent)
Rating reasons
(numeric
values)
Acres in AOI
Percent of AOI
4
Ascalon
sandy
to 6
slopes
fine
loam, 0
percent
Somewhat
limited
Ascalon (85%)
Frost action
(0.50)
59.6
66.0%
Hillslope
(0.13)
position
Olnest (8%)
Frost
(0.50)
action
Hillslope
(0.13)
position
Otero (7%)
Frost action
(0.50)
46
Otero
loam,
sandy
0 to 3
percent slopes
Not limited
Otero (85%)
30.7
34.0%
Totals for Area of Interest
90.3
100.0%
Rating
Acres in AOI
Percent of AOI
Somewhat
limited
59.6
66.0%
Not limited
30.7
34.0%
Totals for Area of Interest
90.3
100.0%
Rating Options Solar Arrays, Ballast Anchor Systems (PS 65
Chad Smith Phase 1 and 2 Solar)
Aggregation Method: Dominant Condition
Component Percent Cutoff. None Specified
Tie -break Rule: Higher
Land Classifications
Land Classifications are specified land use and management groupings that are
assigned to soil areas because combinations of soil have similar behavior for
specified practices. Most are based on soil properties and other factors that directly
influence the specific use of the soil. Example classifications include ecological site
classification, farmland classification, irrigated and nonirrigated land capability
classification, and hydric rating.
21
Custom Soil Resource Report
Farmland Classification (PS 65 Chad Smith Phase 1 and
2)
Farmland classification identifies map units as prime farmland, farmland of
statewide importance, farmland of local importance, or unique farmland. It identifies
the location and extent of the soils that are best suited to food, feed, fiber, forage,
and oilseed crops. NRCS policy and procedures on prime and unique farmlands are
published in the "Federal Register," Vol. 43, No. 21, January 31, 1978.
22
40° 40' 8" N
40° 39' 37' N
519900
Custom Soil Resource Report
Map Farmland Classification (PS 65 Chad Smith Phase 1 and 2)
520000
520100
Map Scale: 1:6,590 if printed on A landscape (11" x 8.5") sheet
Meters
0 50 100 200 300
520200
Feet
0 300 600 1200 1800
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84
23
520400
520500
520600
520700
520800
520900
521000
104° 45'3'W
1040 45' 3" W
1
S
r-
40° 40' 8" N
40° 39'37'N
Custom Soil Resource Report
MAP LEGEND
Area of Interest (AO!)
Area of Interest (AO1)
Soils
Soil Rating Polygons
Not prime farmland
All areas are prime
farmland
Prime farmland if drained
Prime farmland if
protected from flooding or
not frequently flooded
during the growing
season
Prime farmland if irrigated
Prime farmland if drained
and either protected from
flooding or not frequently
flooded during the
growing season
Prime farmland if irrigated
and drained
Prime farmland if irrigated
and either protected from
flooding or not frequently
flooded during the
growing season
Prime farmland if
subsoiled, completely
removing the root
inhibiting soil layer
Prime farmland if irrigated
and the product of I (soil
erodibility) x C (climate
factor) does not exceed
60
Prime farmland if irrigated
and reclaimed of excess
salts and sodium
Farmland of statewide
importance
Farmland of statewide
importance, if drained
Farmland of statewide
importance, if protected
from flooding or not
frequently flooded during
the growing season
Farmland of statewide
importance, if irrigated
Farmland of statewide
importance, if drained and
either protected from
flooding or not frequently
flooded during the
growing season
Farmland of statewide
importance, if irrigated
and drained
Farmland of statewide
importance, if irrigated
and either protected from
flooding or not frequently
flooded during the
growing season
Farmland of statewide
importance, if subsoiled,
completely removing the
root inhibiting soil layer
Farmland of statewide
importance, if irrigated
and the product of I (soil
erodibility) x C (climate
factor) does not exceed
60
Farmland of statewide
importance, if irrigated
and reclaimed of excess
salts and sodium
Farmland of statewide
importance, if drained or
either protected from
flooding or not frequently
flooded during the
growing season
Farmland of statewide
importance, if warm
enough, and either
drained or either
protected from flooding or
not frequently flooded
during the growing
season
Farmland of statewide
importance, if warm
enough
Farmland of statewide
importance, if thawed
Farmland of local
importance
Farmland of local
importance, if irrigated
Farmland of unique
importance
Not rated or not
available
Soil Rating Lines
Not prime farmland
All areas are prime
farmland
Prime farmland if
drained
Prime farmland if
protected from flooding
or not frequently flooded
during the growing
season
Prime farmland if
irrigated
4 Prime farmland if
drained and either
protected from flooding
or not frequently flooded
during the growing
season
Prime farmland if
irrigated and drained
{ Prime farmland if
irrigated and either
protected from flooding
or not frequently flooded
during the growing
season
24
Custom Soil Resource Report
Prime farmland if
subsoiled, completely
removing the root
inhibiting soil layer
0 Prime farmland if irrigated
and the product of I (soil
erodibility) x C (climate
factor) does not exceed
60
Prime farmland if irrigated
and reclaimed of excess
salts and sodium
Farmland of statewide
importance
or _se Farmland of statewide
importance, if drained
Farmland of statewide
importance, if protected
from flooding or not
frequently flooded during
the growing season
LIE Farmland of statewide
importance, if irrigated
Farmland of statewide
importance, if drained and
either protected from
flooding or not frequently
flooded during the
growing season
Farmland of statewide
importance, if irrigated
and drained
Farmland of statewide
importance, if irrigated
and either protected from
flooding or not frequently
flooded during the
growing season
Farmland of statewide
importance, if subsoiled,
completely removing the
root inhibiting soil layer
Farmland of statewide
importance, if irrigated
and the product of I (soil
erodibility) x C (climate
factor) does not exceed
60
„p*
Farmland of statewide
importance, if irrigated
and reclaimed of excess
salts and sodium
Farmland of statewide
importance, if drained or
either protected from
flooding or not frequently
flooded during the
growing season
Farmland of statewide
importance, if warm
enough, and either
drained or either
protected from flooding or
not frequently flooded
during the growing
season
Farmland of statewide
importance, if warm
enough
i Farmland of statewide
importance, if thawed
Farmland of local
importance
Farmland of local
importance, if irrigated
i g Farmland of unique
0
importance
Not rated or not available
Soil Rating Points
a
0
X
C
Not prime farmland
All areas are prime
farmland
Prime farmland if drained
Prime farmland if
protected from flooding or
not frequently flooded
during the growing
season
Prime farmland if irrigated
Prime farmland if drained
and either protected from
flooding or not frequently
flooded during the
growing season
Prime farmland if irrigated
and drained
Prime farmland if irrigated
and either protected from
flooding or not frequently
flooded during the
growing season
0
0
0
0
0
a
Prime farmland if
subsoiled, completely
removing the root
inhibiting soil layer
Prime farmland if
irrigated and the product
of I (soil erodibility) x C
(climate factor) does not
exceed 60
Prime farmland if
irrigated and reclaimed
of excess salts and
sodium
Farmland of statewide
importance
Farmland of statewide
importance, if drained
Farmland of statewide
importance, if protected
from flooding or not
frequently flooded during
the growing season
Farmland of statewide
importance, if irrigated
25
Custom Soil Resource Report
0
•
0
0
Farmland of statewide
importance, if drained and
either protected from
flooding or not frequently
flooded during the
growing season
Farmland of statewide
importance, if irrigated
and drained
Farmland of statewide
importance, if irrigated
and either protected from
flooding or not frequently
flooded during the
growing season
Farmland of statewide
importance, if subsoiled,
completely removing the
root inhibiting soil layer
Farmland of statewide
importance, if irrigated
and the product of I (soil
erodibility) x C (climate
factor) does not exceed
60
a
0
a
0
n
Farmland of statewide
importance, if irrigated
and reclaimed of excess
salts and sodium
Farmland of statewide
importance, if drained or
either protected from
flooding or not frequently
flooded during the
growing season
Farmland of statewide
importance, if warm
enough, and either
drained or either
protected from flooding or
not frequently flooded
during the growing
season
Farmland of statewide
importance, if warm
enough
Farmland of statewide
importance, if thawed
Farmland of local
importance
Farmland of local
importance, if irrigated
0 Farmland of unique
importance
Not rated or not available
a
Water Features
Streams and Canals
Transportation
Rails
Background
=*
Interstate Highways
US Routes
Major Roads
Local Roads
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data
as of the version date(s) listed below.
Soil Survey Area: Weld County, Colorado, Northern Part
Survey Area Data: Version 18, Aug 24, 2023
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jun 8, 2021 Jun
12, 2021
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.
26
Custom Soil Resource Report
Table Farmland Classification (PS 65 Chad Smith Phase 1 and
2)
Map
unit
symbol
Map unit name
Rating
Acres in AOI
Percent of AOI
4
Ascalon
0 to 6
fine sandy
percent slopes
loam,
Farmland
importance
of statewide
59.6
66.0%
46
Otero
sandy
percent
slopes
loam, 0 to 3
Not prime farmland
30.7
34.0%
Totals for Area of Interest
90.3
100.0%
Rating Options Farmland Classification (PS 65 Chad Smith
Phase 1 and 2)
Aggregation Method: No Aggregation Necessary
Tie -break Rule: Lower
27
References
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep -water habitats of the United States. U.S. Fish and Wildlife
Service FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric
soils in the United States.
N ational Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.
U .S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/
nres/detai I/national/soils/?cid=nres 142p2_054262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for
making and interpreting soil surveys. 2nd edition. Natural Resources Conservation
Service, U.S. Department of Agriculture Handbook 436. http://
www.nres. usda.gov/wps/portal/nres/detail/national/soils/?cid=n res142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://
www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=n res142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
U nited States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
U nited States Department of Agriculture, Natural Resources Conservation Service.
N ational forestry manual. http://www.nres.usda.gov/wps/portal/nres/detail/soils/
home/?cid=nrcs142p2_053374
p2_053374
U nited States Department of Agriculture, Natural Resources Conservation Service.
N ational range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/
detail/national/landuse/rangepastu re/?cid=stelprdb 1043084
28
Custom Soil Resource Report
U nited States Department of Agriculture, Natural Resources Conservation Service.
N ational soil survey handbook, title 430 -VI. http://www.nrcs.usda.gov/wps/portal/
nres/detai I/soils/scientists/?cid=nres 142p2 054242
U nited States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,
the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook
296. http://www.nres.usda.gov/wps/portal/nres/detail/national/soils/?
cid=nrcs142p2_053624
U nited States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http://
www.nres.usda.gov/Internet/FSE_DOCUMENTS/nres142p2_052290.pdf
29
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