HomeMy WebLinkAbout20253162 USDA United States A product of the National Custom Soi I Resource
Department of Cooperative Soil Survey ,
Agriculture a joint effort of the United Report for
States Department of
Agriculture and other We d County ,
Federal agencies , State
Natural agencies including the
Resources Agricultural Experiment Co orado ,
Conservation Stations and local
Service participants
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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 . nres . usda . gov /wps /
portal / nres / 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 / ocator / app ? agency = nres ) or your NRCS State Soil
Scientist ( http : // www . nres . usda . gov / wps / portal / nres / detail / soils / contactus / ?
cid = nres 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 ( MRCS ) 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 ( Soil Map ) 9
Legend 10
Map Unit Legend ( Soil Map ) 11
Map Unit Descriptions ( Soil Map ) 11
Weld County, Colorado , Southern Part 13
79 —Weld loam , 1 to 3 percent slopes 13
Soil Information for All Uses 15
Suitabilities and Limitations for Use 15
Land Classifications 15
Farmland Classification ( Farmland Classification ) 15
Soil Properties and Qualities 21
Soil Qualities and Features 21
Hydrologic Soil Group ( Hydrologic Soil Group ) 21
References 26
4
How So '� 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
5
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 .
S oil 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 .
S ome 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 .
P redictions 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.
7
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
Soil Map ( Soil Map ) a
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Custom Soil Resource Report
MAP LEGEND MAP INFORMATION
Area of Interest ( AOI ) Spoil Area The soil surveys that comprise your AOI were mapped at
Area of Interest ( AOI ) 1 . 24 , 000 .
Stony Spot
Soils Very Stony Spot
Soil Map Unit Polygons ' Warning : Soil Map may not be valid at this scale .
V Wet Spot
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 g pp g y
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
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 Major Roads Coordinate System : Web Mercator ( EPSG : 3857 )
Landfill Local Roads Maps from the Web Soil Survey are based on the Web Mercator
Lava Flow Background projection , which preserves direction and shape but distorts
distance and area . A projection that preserves area , such as the
Marsh or swamp +1 � 4r ° Aerial Photography
r , - Albers equal - area conic projection , should be used if more
w Mine or Quarry accurate calculations of distance or area are required .
CD Miscellaneous Water This product is generated from the USDA - MRCS certified data as
0 Perennial Water of the version date ( s ) listed below .
Rock Outcrop Soil Survey Area : Weld County , Colorado , Southern Part
+ Saline Spot Survey Area Data : Version 21 , Sep 1 , 2022
' ` � � Sandy Spot
. .. ., Soil map units are labeled ( as space allows ) for map scales
Severely Eroded Spot 1 : 50 , 000 or larger .
40, Sinkhole Date ( s ) aerial images were photographed : Jul 2 , 2021 —Aug 25 ,
it,\,s. Slide or Slip 2021
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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Custom Soil Resource Report
MapUnit Legend Soi I Map )
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
79 Weld loam , 1 to 3 percent 3 . 2 100 . 0 %
slopes
Totals for Area of Interest 3 . 2 100 . 0 %
ap Unit Descriptions Soi I Map )
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
u p 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
n oncontrasting , 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
u sefulness 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 .
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Custom Soil Resource Report
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 .
S oils 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 .
S oils 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 .
S ome 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 .
S ome surveys include miscellaneous areas . Such areas have little or no soil
material and support little or no vegetation . Rock outcrop is an example .
12
Custom Soil Resource Report
Weld County, Colorado , Southern Part
79 —Weld loam , 1 to 3 percent slopes
Map Unit Setting
National map unit symbol : 2x0hw
Elevation : 3 , 600 to 5 , 750 feet
Mean annual precipitation : 12 to 17 inches
Mean annual air temperature : 46 to 54 degrees F
Frost - free period : 115 to 155 days
Farmland classification : Prime farmland if irrigated
Map Unit Composition
Weld and similar soils : 80 percent
Minor components : 20 percent
Estimates are based on observations , descriptions , and transects of the mapunit .
Description of Weld
Setting
Landform : Imerfluves
Landform position (two - dimensional) : Summit
Landform position (three - dimensional) : Interfluve
Down - slope shape : Linear
Across - slope shape : Linear
Parent material : Calcareous loess
Typical profile
Ap - 0 to S inches : loam
Bt1 - 8 to 12 inches : clay
Bt2 - 12 to 15 inches : clay loam
Btk - 15 to 28 inches : loam
Bk - 28 to 60 inches : silt loam
C - 60 to 80 inches : silt loam
Properties and qualities
Slope : 1 to 3 percent
Depth to restrictive feature : More than 80 inches
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 in / hr )
Depth to water table : More than 80 inches
Frequency of flooding : None
Frequency of ponding : None
Calcium carbonate , maximum content: 14 percent
Maximum salinity: Nonsaline to very slightly saline ( 0 . 1 to 2 . 0 mmhos / cm )
Sodium adsorption ratio , maximum : 5 . 0
Available water supply, 0 to 60 inches : High ( about 11 . 3 inches )
Interpretive groups
Land capability classification (irrigated) : 2e
Land capability classification (nonirrigated) : 3c
Hydrologic Soil Group : C
Ecological site : R067BY002C0 - Loamy Plains
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Custom Soil Resource Report
Hydric soil rating : No
Minor Components
Adena
Percent of map unit : 8 percent
Landform : I me rf l uves
Landform position (two - dimensional) : Shoulder
Landform position (three - dimensional) : Interfluve
Down - slope shape : Convex
Across - slope shape : Convex
Ecological site : R067BY002C0 - Loamy Plains
Hydric soil rating : No
Col by
Percent of map unit: 7 percent
Landform : Hillslopes
Landform position (two - dimensional) : Backslope
Landform position (three - dimensional) : Side slope
Down - slope shape : Convex
Across - slope shape : Convex
Ecological site : R067BY002C0 - Loamy Plains
Hydric soil rating : No
Keith
Percent of map unit : 3 percent
Landform : Imerfluves
Landform position (two - dimensional) : Summit
Landform position (three - dimensional) : Interfluve
Down - slope shape : Linear
Across - slope shape : Linear
Ecological site : R067BY002C0 - Loamy Plains
Hydric soil rating : No
Baca
Percent of map unit: 2 percent
Landform : Imerfluves
Landform position (two - dimensional) : Summit , shoulder
Landform position (three - dimensional) : Interfluve
Down - slope shape : Convex , linear
Across - slope shape : Convex , linear
Ecological site : R067BY002C0 - Loamy Plains
Hydric soil rating : No
14
Soil Information for All Uses
Sulab t es 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 .
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 .
Farmland Classification ( Farmland Classification )
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 .
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Custom Soil Resource Report
Map Farmland Classification ( Farmland Classification ) Lo
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Custom Soil Resource Report
MAP LEGEND
Area of Interest ( AOI ) I I Prime farmland if I I Farmland of statewide I I Farmland of statewide I I Farmland of unique
Area of Interest ( AOI ) subsoiled , completely importance , if drained and importance , if irrigated importance
removing the root either protected from and reclaimed of excess I Not rated or not
Soils inhibiting soil layer flooding or not frequently salts and sodium available
Soil RatingPrime farmland if irrigated flooded during the Farmland of statewide
Polygons I I growing season I I Soil Rating Lines
and the product of I ( soil importance , if drained or
I I Not prime farmland erodibility ) x C ( climate l I Farmland of statewide either protected from Not prime farmland
I All areas are prime factor ) does not exceed importance , if irrigated flooding or not frequently ce 0 All areas are prime
farmland 60 and drained flooded during the
farmland
Prime farmland if irrigated ( I Farmland of statewide growing season
I I Prime farmland if drained I x 0 Prime farmland if
and reclaimed of excess importance , if irrigated I I Farmland of statewide drained
I Prime farmland if salts and sodium and either protected from importance , if warm
protected from flooding or I I Farmland of statewide flooding or not frequently enough , and either i Prime farmland if
not frequently flooded importance flooded during the drained or either protected from flooding
during the growing I growing season protected from flooding or or not frequently flooded
I Farmland of statewide not frequently flooded during the growing
season Farmland of statewide
importance , if drained I during the growing season
Prime farmland if irrigated Farmland of statewide importance , if subsoiled , season
completely removing the Prime farmland if
I Prime farmland if drained importance , if protected root inhibiting soil layer I I Farmland of statewide irrigated
and either protected from from flooding or not importance , if warm 4 ,,
p P Prime farmland if
frequently flooded during I I Farmland of statewide
flooding or not frequently importance , if irrigated enough drained and either
flooded during the the growing season protected from flooding
and the product of I ( soil I I Farmland of statewide P g
growing season I I Farmland of statewide erodibility ) x C ( climate importance , if thawed or not frequently flooded
Prime farmland if irrigated importance , if irrigated factor ) does not exceed during the growing
1 I I Farmland of local
and drained 60 season
importance
I Prime farmland if irrigated I I Farmland of locales Prime farmland if
and either protected from importance , if irrigated irrigated and drained
flooding or not frequently i i Prime farmland if
flooded during the irrigated and either
growing season protected from flooding
or not frequently flooded
during the growing
season
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Custom Soil Resource Report
Prime farmland if f I Farmland of statewide it 0 Farmland of statewide fit 0 Farmland of unique Prime farmland if
subsoiled , completely importance , if drained and importance , if irrigated importance subsoiled , completely
removing the root either protected from and reclaimed of excess Ai ,, Not rated or not available removing the root
inhibiting soil layer flooding or not frequently salts and sodium inhibiting soil layer
ft 0 Prime farmland if irrigated flooded during the Farmland of statewide Soil Rating Points at Prime farmland if
and the product of I ( soil growing season importance , if drained or irrigated and the product
Not prime farmland g
erodibility ) x C ( climate Farmland of statewide either protected from of I ( soil erodibility ) x C
factor ) does not exceed importance , if irrigated flooding or not frequently a All areas are prime ( climate factor ) does not
60 and drained flooded during the farmland exceed 60
Apt Prime farmland if irrigated Farmland of statewide growing season Prime farmland if drained • Prime farmland if
and reclaimed of excess importance , if irrigated , _ _i Farmland of statewide irrigated and reclaimed
salts and sodium and either protected from importance , if warm Prime farmland if of excess salts and
Farmland of statewide flooding or not frequently enough , and either protected from flooding or sodium
importance flooded during the drained or either not frequently flooded MI Farmland of statewide
growing season protected from flooding or during the growing
0 __ _f Farmland of statewide not frequently flooded season importance
importance , if drained Farmland of statewide s Farmland of statewide
importance , if subsoiled , during the growing X Prime farmland if irrigated
0 0 Farmland of statewide completely removing the season importance , if drained
importance , if protected root inhibiting soil layer 0 0 Farmland of statewide Prime farmland if drained . Farmland of statewide
from flooding or not importance , if warm and either protected from importance , if protected
frequently flooded during t ■= Farmland of statewide enough flooding or not frequently from flooding or not
the growing season importance , if irrigated flooded during the frequently flooded during
and the product of I ( soil * 0 Farmland of statewide growing season the growing season
A xi Farmland of statewide g g g g
erodibility ) x C ( climate importance , if thawed
importance , if irrigated factor ) does not exceed Prime farmland if irrigated a Farmland of statewide
60 id 0 Farmland of local and drained importance , if irrigated
importance
Prime farmland if irrigated
A 0 Farmland of local and either protected from
importance , if irrigated flooding or not frequently
flooded during the
growing season
18
Custom Soil Resource Report
Farmland of statewide • Farmland of statewide Farmland of unique The soil surveys that comprise your AOI were mapped at
importance , if drained and importance , if irrigated importance 1 . 24 , 000 .
either protected from and reclaimed of excess • - Not rated or not available
flooding or not frequently salts and sodium
flooded during the Farmland of statewide Water Features Warning : Soil Map may not be valid at this scale .
growing season importance , if drained or Streams and Canals
® Farmland of statewide either protected from Enlargement of maps beyond the scale of mapping can cause
importance , if irrigated flooding or not frequently Transportation misunderstanding of the detail of mapping and accuracy of soil
and drained flooded during the Rails
growing season line placement . The maps do not show the small areas of
Farmland of statewide contrasting soils that could have been shown at a more detailed
importance , if irrigated Farmland of statewide Interstate Highways
and either protected from importance , if warm scale .
flooding or not frequently enough , and either US Routes
flooded during the drained or either Major Roads
growing season protected from flooding or Please rely on the bar scale on each map sheet for map
Farmland of statewide not frequently flooded Local Roads measurements .
importance , if subsoiled , during the growing
completely removing the season Background Source of Map : Natural Resources Conservation Service
root inhibiting soil layer t Farmland of statewide Aerial Photography Web Soil Survey URL :
Farmland of statewide importance , if warm Coordinate System : Web Mercator ( EPSG : 3857 )
importance , if irrigated enough
and the product of I ( soil a Farmland of statewide Maps from the Web Soil Survey are based on the Web Mercator
erodibility ) x C ( climate importance , if thawed
factor ) does not exceed projection , which preserves direction and shape but distorts
is Farmland of local
60 importance distance and area . A projection that preserves area , such as the
Albers equal - area conic projection , should be used if more
Farmland of local accurate calculations of distance or area are required .
importance , if irrigated
This product is generated from the USDA - NRCS certified data
as of the version date ( s ) listed below .
S oil Survey Area : Weld County , Colorado , Southern Part
S urvey Area Data : Version 21 , Sep 1 , 2022
S oil map units are labeled ( as space allows ) for map scales
1 : 50 , 000 or larger .
Date ( s ) aerial images were photographed : Jul 2 , 2021 —Aug
25 , 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 .
19
Custom Soil Resource Report
Table — Farmland Classification ( Farmland Classification )
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
79 Weld loam , 1 to 3 Prime farmland if 3 . 2 100 . 0 %
percent slopes irrigated
Totals for Area of Interest 3 . 2 100 . 0 %
Rating Options — Farmland Classification ( Farmland
Classification )
Aggregation Method : No Aggregation Necessary
Tie - break Rule : Lower
20
Custom Soil Resource Report
Soil Properties and Qualities
The Soil Properties and Qualities section includes various soil properties and
qualities 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 property or quality.
Soil Qualities and Features
Soil qualities are behavior and performance attributes that are not directly
measured , but are inferred from observations of dynamic conditions and from soil
properties . Example soil qualities include natural drainage , and frost action . Soil
features are attributes that are not directly part of the soil . Example soil features
include slope and depth to restrictive layer . These features can greatly impact the
use and management of the soil .
Hydrologic Soil Group ( Hydrologic Soil Group )
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
21
Custom Soil Resource Report
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 .
22
Custom Soil Resource Report
Map — Hydrologic Soil Group ( Hydrologic Soil Group ) Lo
N.
in
o
S
502830 502850 502870 502890 502910 502930 502950 502970 502990 503010 503030 503050
40 ° 20 ' 57 ' N , - _ q . �= - : : �=r =�iR = _ , i : I � _ " -, , r s. or* - I , 40 ° 20 ' 57 ' N
r . _ At a - . 40• * ItiarklablF.,-;,,,,,,,,ta - i
ISIS
lir
_ - - _ - _ _ # et
- ` . irs t • .
ro s
W . i
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I - ■ 1 - . i w �. . . � - .. tea. - - -- - r na - �
44
Lrrrr1. ' 6 rRi i 'r - -a. .r 1� ` s �71 i � � ii
1 . - 1 ` -10
a
tot
' 1 as IS • ,
1111:
ak tris
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�•
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r
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. . , i , ,
le ' s
11 .
R lat. 11/4-\
. , � _ �
i
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- 1 4
T
I IN . - •
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____ . _ _
iuk : - itc„ ,
, -IN/ -.1,„„.... ,%,,,,,
et
4 . .
, i
I ;,.--= . 4.,: DI , , , _ , in . ail, : 1 •5;i:r I 1 I I
1
40 ° 20 ' 52 " N I , 40 ° 20 ' 52 " N
502830 502850 502870 502890 502910 502930 502950 502970 502990 503010 503030 503050
0 0
in
a) Map Scale : 1 : 1 , 060 if printed on A landscape ( 11 " x 8 . 5 ") sheet
Meters in
N 0 15 30 60ri
90
Feet
0 50 100 200 300
Map projection : Web Mercator Corner coordinates : WGS84 Edge tics : UTM Zone 13N WGS84
23
Custom Soil Resource Report
MAP LEGEND MAP INFORMATION
Area of Interest ( AOI ) C The soil surveys that comprise your AOI were mapped at
Area of Interest ( AOI ) 1 . 24 , 000 .
C / D
Soils
•
D Warning : not be valid at this scale .
Soil Rating Polygons Soil Map may
I A Not rated or not available
Enlargement of maps beyond the scale of mapping can cause
I A / D Water Features misunderstanding of the detail of mapping and accuracy of soil
Streams and Canals line placement . The maps do not show the small areas of
I B
Transportation contrasting soils that could have been shown at a more detailed
I B / D Rails scale .
I I C Interstate Highways
P lease rely on the bar scale on each map sheet for map
I C / D US Routes measurements .
I D
Major Roads
S ource of Map : Natural Resources Conservation Service
Not rated or not available
I I Local Roads Web Soil Survey URL :
S oil Rating Lines Background Coordinate System : Web Mercator ( EPSG : 3857 )
A ,° Aerial Photography
. Maps from the Web Soil Survey are based on the Web Mercator
A / D projection , which preserves direction and shape but distorts
Hitt B distance and area . A projection that preserves area , such as the
Albers equal - area conic projection , should be used if more
koret B / D accurate calculations of distance or area are required .
r 0 C
This product is generated from the USDA - NRCS certified data as
C / D of the version date ( s ) listed below .
D
S oil Survey Area : Weld County , Colorado , Southern Part
Not rated or not available Survey Area Data : Version 21 , Sep 1 , 2022
S oil Rating Points
A Soil map units are labeled ( as space allows ) for map scales
1 : 50 , 000 or larger .
i A / D
B Date ( s ) aerial images were photographed : Jul 2 , 2021 -Aug 25 ,
2021
■ B / D
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 .
24
Custom Soil Resource Report
Table — Hydrologic Soil Group ( Hydrologic Soil Group )
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
79 Weld loam , 1 to 3 C 3 . 2 100 . 0 %
percent slopes
Totals for Area of Interest 3 . 2 100 . 0 %
Rating Options — Hydrologic Soil Group ( Hydrologic Soil Group )
Aggregation Method : Dominant Condition
Component Percent Cutoff: None Specified
Tie - break Rule : Higher
25
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
S ervice 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 . 01 2006 . Field indicators of hydric
soils in the United States .
N ational Research Council . 1995 . Wetlands : Characteristics and boundaries .
S oil Survey Division Staff . 1993 . Soil survey manual . Soil Conservation Service .
U . S . Department of Agriculture Handbook 18 . http : / / www . nres . usda . gov / wps / portal /
nres / detail / nationa / soils / ? cid = nres142p2 _ 054262
S oil Survey Staff . 1999 . Soil taxonomy : A basic system of soil classification for
making and interpreting soil surveys . 2nd edition . Natural Resources Conservation
S ervice , U . S . Department of Agriculture Handbook 436 . http : / /
www . nres . usda . gov /wps / portal / nres / detail / national / soils / ? cid = nres142p2 _ 053577
S oil Survey Staff . 2010 . Keys to soil taxonomy . 11 th edition . U . S . Department of
Agriculture , Natural Resources Conservation Service . http : / /
www . nres . usda . gov /wps / portal / nres / detail / national / soils / ? cid = nres142p2 _ 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
S ection .
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 / detai / soils /
home / ? cid = nres 142 p2 _ 053374
U nited States Department of Agriculture , Natural Resources Conservation Service .
N ational range and pasture handbook . http : / / www . nres . usda . gov/ wps / portal / nres /
detail / national / landuse / rangepastu re / ? cid = stelprdb 1043084
26
Custom Soil Resource Report
U nited States Department of Agriculture , Natural Resources Conservation Service .
N ational soil survey handbook , title 43041 . http : / / www . nres . usda . gov/ wps / portal /
nres / detai I / soi Is / 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 = nres 142p2 _ 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
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