HomeMy WebLinkAbout20101560.tiff • •
USDA United States A product of the National Custom Soil Resource
a Department of Cooperative Soil Survey,
Agriculture a joint effort of the United Report for
• States Department of
ttte
u � S Weld County ,
Natural agencies including the Colorado ,
Resources Agricultural Experiment
Conservation Stations, and local
Service participants Southern Part
Marcellina Dairy, LLC_ .II ,
S et iii— iV
...... ..,4! t:
.i,...,r,t,
•
...v.y.. 4 , .
,..„,y; „vie .._ . ....
�♦ i ..-, . . _ .... Y or=.-..ti k
..,. !di --sot+, _` f 7,' • -.,-- 4•21.• . --.7...-7.:'
L it • •-:.- '1 ' A'�� 1• !1 • T j
♦i .... ta'rrl'' -r-----%—.. -4,2.$ 44E." ...` �
- •• l-"
=. 3 '-.1-r.rw• • Xatwvvi•- . - r♦ ( . t - ' _ .�_K: •• '
`. 4.1 .,.-7
-; } I\Y _�trE -F ?lI;' i Yf^iss�l i+ r s: • ♦1
K ,.-4 - .:. ' ±w`vi 'I _ "r•tt.- u . Sy« ..:. -. a Yom. l... .ti
/Y •
, � r • - .. -..-aU T- '_ .
.�•s" .,�+.Y�:�. �ST�''`fC •�! c ,. a' ''A` 7►•} '4 b�.- o. _
,� /•�� �7•��II►p�•{µ-J, •'may f - .- . ..x.. / ler•I j ,q • •
..\.14414‘1 .. '.C',`•`�u w t'a_.T-.Yi♦y..l tf . JN. .r�
tut
Wirwir4,
t t S �1._ • l � •fi t. .. i► 4r--'
. . ,?4 1 iiih •
nil
•
a: ; V,
r, •t• Opel . ,--- _ j„. - . _
4411 ,el
�. JP itiv at Iii
i ""sue
tr si { a
E.—- .F irk r
y
V -
s
• - 411
' 4/
0 538ft ' -
2010-1560
•
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://soils.usda.gov/sqi/) and certain
conservation and engineering applications. For more detailed information, contact
your local USDA Service Center(http://offices.sc.egov.usda.gov/locator/app?
agency=nrcs) or your NRCS State Soil Scientist(http://soils.usda.gov/contact/
state_offices/).
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 Soil Data Mart Web site or the NRCS Web Soil Survey. The Soil
Data Mart is the data storage site for the 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
individuals income is derived from any public assistance program. (Not all prohibited
• bases apply to all programs.) Persons with disabilities who require alternative means
2
• 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 7
Soil Map 8
Legend 9
Map Unit Legend 10
Map Unit Descriptions 10
Weld County, Colorado, Southern Part 12
13—Cascajo gravelly sandy loam, 5 to 20 percent slopes 12
47—Olney fine sandy loam, 1 to 3 percent slopes 13
77—Vona sandy loam, 3 to 5 percent slopes 14
References 16
•
•
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
• scientists classified and named the soils in the survey area, they compared the
5
• •
Custom Soil Resource Report
• 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
identified each as a specific map unit.Aerial photographs show trees,buildings,fields,
roads, and rivers, all of which help in locating boundaries accurately.
•
6
.
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.
•
•
• Custom So*s ource Report • .Soil Map
01
u) I
0)
zo
Q (7
n 6
r d
Q
52900D 529100 529200 529300 529400 529500 529600 529700 529800
40. 19' 1"
! 40" 19' 1"
}t t
1 I
I
0
m o
cp
;, .c. .
,r r
q •
-.co
'� 1, _ co• to
cA
I it r v
\iti1/41r
t?ii,b;4•41 . , ., • i rtH"
i • *if,
. A
1 I/
4' / "
1 +404ailc tr(ap'ta(.a q-'t••v . •••vr.s•:4►i MAMA a•"RYLfllt ,4t, .J.1 .... -�. _ silt 3: - � + ' r I
O c .. i/JI1I Y�1F i•4. _ a'
I , '
. AL+ Y p•nm ar:-:v • ' j{� iti '1� ,f•1., C-')• �4. 1 ) .• .. : . •.r
ik•••--,*\IC fk ft •. • , 4,,,
.11 11•' • .7.).1. d:!1 •. .f. 4I 1 4 4 I '1/4 4, . i
. _ ipt • rk"-
a - -ens (.)
v
•
( 4000.00411H,ii-/iiis./4 egcti
III
•
ci Dwehliti ' . - .a• • 1: 0
la
co
In
1 NI-
' K! 1
I 4 S p f
t ?. 1
4
. rt ' ',11‘ .� •d .t lel .5.. _•f, 1`•Illt^yl �, - _ ... ') ._ 1... I N' '"+e[nr °. i .1�� t . I _•
o
str
Pi i " v
40' 18' 41" j aid:.
___..:. - v 40° 18' 411.
NT
529000 529100 529200 529300 529400 529500 529600 529 00 529800
Map Scale: 1:4,370 if printed on A size (8.5"x 11") sheet. ua
Mto
dp
Meters M
$ N 0 50 100 200 300 0
A Feet
0 200 400 800 1 ,200
• • •
Custom Soil Resource Report
MAP LEGEND MAP INFORMATION
Area of Interest(Aol) CD Very Stony Spot Map Scale: 1:4,370 if printed on A size(8.5'x 11")sheet.
r Area of Interest(AOl) if Wet Spot
soils The soil surveys that comprise your AOl were mapped at 1:24,000.
s Other
Soil Map Units Please rely on the bar scale on each map sheet for accurate map
Line Features
Special Point Features measurements.
Gully •
l'J Blowout
Short Steep Slope Source of Map: Natural Resources Conservation Service
® Borrow Pit Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov
nres.usda. ov
Other P' Y 9
f2 Clay Spot - Coordinate System: UTM Zone 13N NAD83
Political Features
Closed Depression Cities
O This product is generated from the USDA-NRCS certified data as of
K: Gravel Pit Water Features the version date(s)listed below.
Gravelly Spot t7 Oceans
Soil Survey Area: Weld County,Colorado,Southern Part
Landfill Streams and Canals Survey Area Data: Version 11,Aug 27,2009
A Lava Flow Transportation
+-i-r Rails
4.L. Marsh or swamp Date(s)aerial images were photographed: 8/6/2005
x. Mine or Quarry N Interstate Highways The orthophoto or other base map on which the soil lines were
I_., Miscellaneous Water �'� US Routes compiled and digitized probably differs from the background
imagery displayed on these maps.As a result,some minor shifting
r.. Perennial Water Major Roads of map unit boundaries may be evident.
.. Rock Outcrop it' Local Roads
} Saline Spot
Sandy Spot •
Severely Eroded Spot
Sinkhole
Is Slide or Slip
g Sodic Spot
Spoil Area
Stony Spot
• •
Custom Soil Resource Report
•
Map Unit Legend
Weld County,Colorado,Southern Part(C0618)
Map Unit Symbol Map Unit Name Acres in AOI I Percent of AOI
13 Cascajo gravelly sandy loam,5 to 20 10.5• 13.2%
percent slopes
47 Olney fine sandy loam, 1 to 3 percent 50.4 63.0%
slopes
77 I Vona sandy loam, 3 to 5 percent slopes 19.1 23.9%
Totals for Area of Interest 80 100.0%
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
10
Custom Soil Resource Report
• 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.
•
11
Custom Soil Resource Report
Weld County, Colorado, Southern Part
13—Cascajo gravelly sandy loam, 5 to 20 percent slopes
Map Unit Setting
Elevation:4,600 to 5,200 feet
Mean annual precipitation: 11 to 13 inches
Mean annual air temperature: 52 to 54 degrees F
Frost-free period: 120 to 160 days
Map Unit Composition
Cascajo and similar soils: 85 percent
Minor components: 15 percent
Description of Cascajo
Setting
Landform: Ridges, terraces
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Calcareous gravelly alluvium
Properties and qualities
Slope: 5 to 20 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Excessively drained
Capacity of the most limiting layer to transmit water(Ksat): High (2.00 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: 25 percent
Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm)
Available water capacity: Low (about 4.1 inches)
Interpretive groups
Land capability(nonirrigated): 7s
Ecological site: Gravel Breaks (R067BY063CO)
Typical profile
0 to 9 inches: Gravelly sandy loam
9 to 31 inches: Extremely gravelly sandy loam
31 to 60 inches: Very gravelly sand
Minor Components
Renohill
Percent of map unit: 8 percent
Samsil
Percent of map unit: 7 percent
•
12
• •
Custom Soil Resource Report
•
47—Olney fine sandy loam, 1 to 3 percent slopes
Map Unit Setting
Elevation: 4,600 to 5,200 feet
Mean annual precipitation: 11 to 15 inches
Mean annual air temperature:46 to 54 degrees F
Frost-free period: 125 to 175 days
Map Unit Composition
Olney and similar soils: 85 percent
Minor components: 15 percent
Description of Olney
Setting
Landform: Plains
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Mixed deposit outwash
Properties and qualities
• Slope: 1 to 3 percent
Depth to restrictive feature: More than 80 inches
Drainage class:Well drained
Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high
(0.57 to 2.00 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 15 percent
Maximum salinity Nonsaline (0.0 to 2.0 mmhos/cm)
Available water capacity: Moderate (about 7.0 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability(nonirrigated): 4c
Ecological site: Sandy Plains (R067BY024CO)
Typical profile
0 to 10 inches: Fine sandy loam
10 to 20 inches: Sandy clay loam
20 to 25 inches: Sandy clay loam
25 to 60 inches: Fine sandy loam
Minor Components
Zigweid
Percent of map unit: 10 percent
Vona
•
Percent of map unit: 5 percent
13
Custom Soil Resource Report
•
77—Vona sandy loam, 3 to 5 percent slopes
Map Unit Setting
Elevation:4,600 to 5,200 feet
Mean annual precipitation: 13 to 15 inches
Mean annual air temperature::48 to 55 degrees F
Frost-free period: 130 to 160 days
Map Unit Composition
Vona and similar soils: 85 percent
Minor components: 15 percent
Description of Vona
Setting
Landform: Plains
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Eolian deposits
Properties and qualities
• Slope: 3 to 5 percent
Depth to restrictive feature: More than 80 inches
Drainage class:Well drained
Capacity of the most limiting layer to transmit water(Ksat): High (1.98 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 15 percent
Maximum salinity: Nonsaline to very slightly saline (0.0 to 4.0 mmhos/cm)
Available water capacity: Moderate (about 6.8 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability(nonirrigated):4e
Ecological site: Sandy Plains (R067BY024CO)
Typical profile
0 to 6 inches: Sandy loam
6 to 28 inches: Fine sandy loam
28 to 60 inches: Sandy loam
Minor Components
Remmit
Percent of map unit 7 percent
Olney
Percent of map unit: 5 percent
•
14
Custom Soil Resource Report
• Otero
Percent of map unit: 3 percent
•
15
•
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.
National 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://soils.usda.gov/
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://soils.usda.gov/
Soil Survey Staff. 2006. Keys to soil taxonomy. 10th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://soils.usda.gov/
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.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
United States Department of Agriculture, Natural Resources Conservation Service.
National forestry manual. http://soils.usda.gov/
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://w'Nw.glti.nres.usda.gov/
United States Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430-VI. http://soils.usda.gov/
United 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://soils.usda.gov/
16
• •
Custom Soil Resource Report
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210.
•
•
17
Soil Map—Weld Cou olorado, Southern Part
IIIIII •
g E.
C.,
528900 529000 529100 529 00 529300 529400 529500 529600 529700 529800 529900
40° 19 2" Q •
o
40° 19' 2"
25 —
4
v
Y --i - .� -
_ _ IL
�,y��..,� '
8 - _ ,�( � _ y� � _�! ' ♦ 1 ��rn1L` _ ` ICI Q
J, . v p �-.F. .0^- wC M 1.I�1 wMr .._,. 'I+. .I\\ S
.14 i _ ♦ (D
-1-it I
' • 46 •
O O
CO P �!Of . 0 _ r - CO
-r co
, v
qty
Y
Jr Q cv
_ ._ - • 1
i `7
y
1
el kr i 4 II
/ —
w
1
/as
-
,� _ i, ..s _ 0
co
51
, ,,ii I.4t,
0 , A „..„, .
, _
0
Fr., ii,.... ... _ _c a ( 1.0
.7. icor
III
\ W o o
v V N
i
1
ins r wr-+•i
diretiaraba
40° 18' 38" 40° 18' 38"
528900 529000 529100 529200 529300 529400 529500 529600 529 00 529800 529900
o
Map Scale: 1:5,190 if printed on A size (8.5" x 11") sheet. in
o' Meters ;'
N 0 50 100 200 300 0
A Feet
0 250 500 1 ,000 1 ,500
I ICII.% . . - . _ . . . . - -- - • -
• Soil Map-Weld County,Colorado,Southern Part •
MAP LEGEND MAP INFORMATION
Area of Interest(AOI) 0) Very Stony Spot Map Scale: 1:5,190 if printed on A size(8.5"• 11")sheet.
Area of Interest(AOl) * Wet Spot The soil surveys that comprise your AOI were mapped at 1:24,000.
Soils A. Other Please rely on the bar scale on each map sheet for accurate map
Soil Map Units measurements.
Special Line Features
Special Point Features Gully Source of Map: Natural Resources Conservation Service
ti,
v Blowout Web Soil Survey URL: http://websoilsurvey.nres.usda.gov
Short Steep Slope Coordinate System: UTM Zone 13N NADS3
Borrow Pit •
Other This product is generated from the USDA-NRCS certified data as of
X Clay Spot
Political Features the version date(s)listed below.
• Closed Depression Cities
• Soil Survey Area: Weld County,Colorado,Southern Part
X Gravel Pit Water Features Survey Area Data: Version 11,Aug 27,2009
Gravelly Spot M. Oceans Date(s)aerial images were photographed: 8/6/2005
® Landfill Streams and Canals The orthophoto or other base map on which the soil lines were
/L Lava Flow Transportation compiled and digitized probably differs from the background
-). Rails imagery displayed on these maps.As a result,some minor shifting
• Marsh or swamp of map unit boundaries may be evident.
yt Mine or Quarry ine Interstate Highways
po Miscellaneous Water US Routes
p. Perennial Water Major Roads
Local Roads
v Rock Outcrop N
+ Saline Spot
Sandy Spot
•
Severely Eroded Spot
O Sinkhole
3t Slide or Slip
/r Sodic Spot
a Spoil Area
Q Stony Spot
USDA Natural Resources Web Soil Survey 1/7/2010
Soil Map—Weld County,Colorado,Southern fliPaa •
• Map Unit Legend
Weld County,Colorado,Southern Part(CO618)
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOl
13 Cascajo gravelly sandy loam,5 to 20 13.5 10.3%
percent slopes
46 Olney fine sandy loam,0 to 1 percent 4.7 3.5%
slopes
47 Olney fine sandy loam, 1 to 3 percent 79.7 60.5%
slopes
77 Vona sandy loam,3 to 5 percent slopes 34.0 25.8%
Totals for Area of Interest 131.9 100.0%
•
•
USDA Natural Resources Web Soil Survey 1/7/2010
WI Conservation Service National Cooperative Soil Survey Page 3 of 3
Engineering Properties—Weld County,Cobra Southern Part •
• Engineering Properties
This table gives the engineering classifications and the range of engineering
properties for the layers of each soil in the survey area.
Depth to the upper and lower boundaries of each layer is indicated.
Texture is given in the standard terms used by the U.S. Department of Agriculture.
These terms are defined according to percentages of sand, silt, and clay in the
fraction of the soil that is less than 2 millimeters in diameter. "Loam," for example,
is soil that is 7 to 27 percent clay, 28 to 50 percent silt, and less than 52 percent
sand. If the content of particles coarser than sand is 15 percent or more, an
appropriate modifier is added, for example, "gravelly."
Classification of the soils is determined according to the Unified soil classification
system (ASTM, 2005) and the system adopted by the American Association of
State Highway and Transportation Officials(AASHTO, 2004).
The Unified system classifies soils according to properties that affect their use as
construction material. Soils are classified according to particle-size distribution of
the fraction less than 3 inches in diameter and according to plasticity index, liquid
limit, and organic matter content. Sandy and gravelly soils are identified as GW,
GP, GM, GC, SW, SP, SM, and SC; silty and clayey soils as ML, CL, OL, MH, CH,
and OH; and highly organic soils as PT. Soils exhibiting engineering properties of
two groups can have a dual classification, for example, CL-ML.
The AASHTO system classifies soils according to those properties that affect
• roadway construction and maintenance. In this system,the fraction of a mineral soil
that is less than 3 inches in diameter is classified in one of seven groups from A-1
through A-7 on the basis of particle-size distribution, liquid limit, and plasticity index.
Soils in group A-1 are coarse grained and low in content of fines (silt and clay). At
the other extreme, soils in group A-7 are fine grained. Highly organic soils are
classified in group A-8 on the basis of visual inspection.
If laboratory data are available, the A-1, A-2, and A-7 groups are further classified
as A-1-a, A-1-b, A-2-4, A-2-5, A-2-6, A-2-7, A-7-5, or A-7-6. As an additional
refinement,the suitability of a soil as subgrade material can be indicated by a group
index number. Group index numbers range from 0 for the best subgrade material
to 20 or higher for the poorest.
Rock fragments larger than 10 inches in diameter and 3 to 10 inches in diameter
are indicated as a percentage of the total soil on a dry-weight basis. The
percentages are estimates determined mainly by converting volume percentage in
the field to weight percentage.
Percentage (of soil particles)passing designated sieves is the percentage of the
soil fraction less than 3 inches in diameter based on an ovendry weight.The sieves,
numbers 4, 10, 40, and 200 (USA Standard Series), have openings of 4.76, 2.00,
0.420, and 0.074 millimeters, respectively. Estimates are based on laboratory tests
of soils sampled in the survey area and in nearby areas and on estimates made in
the field.
Liquid limit and plasticity index (Atterberg limits) indicate the plasticity
characteristics of a soil.The estimates are based on test data from the survey area
• or from nearby areas and on field examination.
USDA Natural Resources Web Soil Survey 1/7/2010
a Conservation Service National Cooperative Soil Survey Page 1 of 5
Engineering Properties—Weld County,Coloraa,Southern Part •
• 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.
•
•
USDA Natural Resources Web Soil Survey 1/7/2010
a Conservation Service National Cooperative Soil Survey Page 2 of 5
Engineering P�perties—Weld County, Colorado,Southern Part • III
Report—Engineering Properties
Absence of an entry indicates that the data were not estimated. The asterisk'*'denotes the representative texture; other
possible textures follow the dash.
i,-• -•••- - Engineering Properties-Weld County,Colorado,Southern Part' •-'
Mapunits im oll,andsoil Depth USDA texture Classification Fragments Percentage passing sieve number— Liquid Plasticity
• :=:tllim • limit index
" ' Unified AASHTO >10 3-10 4 10 40
... .... , 200
inches the
•
In Pct Pct Pct
13—Cascajo gravelly
sandy loam,5 to 20
percent slopes j
Cascajo 0-9 `Gravelly sandy loam GC-GM, A-2,A-1 0-10 0-15 60-80 55-75 35-50 20-30 25-30 5-10
SC,
SC-
SM, I
GC
9-31 Extremely gravelly sandy GP-GM, A-1 0 0-15 30-50 25-50 15-30 0-20 — NP
loam,Very gravelly GM,
loamy sand,very GP
gravelly sand
31-60 *Very gravelly sand,Very SP-SM, A-1 0 0-15 30-60 25-60 15-30 0-10 — NP
gravelly loamy sand, GP,
gravelly sand GP-
GM,SP ____
•
QNatural Resources Web Soil Survey 1!712010
Conservation Service National Cooperative Soil Survey Page 3 of 5
• • •
Engineering Properties—Weld County,Colorado,Southern Part
Engineering Properties—Weld County,Colorado,Southern Part
Map unit symbol and soil Depth USDA texture Classification Fragments Percentage passing sieve number— Liquid Plasticity
name limit index
= Unified AASHTO >10 3-10 4 10 40 200
i
Inches inches
In Pct Pct Pct
46—Olney fine sandy
loam,0 to 1 percent
slopes
Olney 0-10 `Fine sandy loam SC,SC- A-4 0 0 100 100 70-85 40-50 25-30 5-10
SMdill
10-20 *Sandy clay loam, Sandy SC-SM, A-6,A-4 0 0 95-100 90-100 80-100 !40-55 25-35 5-15
loam CL,CL-
ML,SC
20-25 `Sandy clay loam,Sandy CL,CL- A-2,A-4 0 0 95-100 95-100 60-90 30-55 25-30 5-10
loam,fine sandy loam ML,
SC,
SC-SM
25-60 *Fine sandy loam,Loamy SM,SC- A-2 0 0 95-100 95-100 60-85 30-50 20-25 NP-5
fine sand,sandy loam SM
47—Olney fine sandy
loam, 1 to 3 percent
slopes
Olney 0-10 ;"Fine sandy loam SC-SM. A-4 0 0 100 100 70-85 40-50 25-30 5-10
SC I - --- -
10-20 "Sandy clay loam,Sandy SC-SM, A-6,A-4 0 0 95-100 90-100 80-100 40-55 25-35 5-15
loam CL,CL-
ML,SC4.
__ i 20-25 1"Sandy clay loam,Sandy SC,SC- A-2,A-4 0 0 95-100 95-100 60-90 30-55 25-30 5-10
loam,fine sandy loam SM,
CL,CL-
ML
25-60 *Fine sandy loam, Loamy SC-SM, A-2 0 0 95-100 95-100 60-85 30-50 20-25 NP-5
fine sand,sandy loam SM
USCA Natural Resources Web Soil Survey 1/7/2010
Conservation Service National Cooperative Soil Survey Page 4 of 5
• • •
Engineering Properties—Weld County,Colorado,Southern Part
. , ;Engineering Properties-Weld County,Colorado,Southern Part . . ,, ;;;Y+3.';'"143.
`.
Map unitsymbol andsoil Depth, „ USDA texture • Classification Fragments,,,• i Percentage passing Sievenumber—» Liquid Plasticity
. . ` : : . ,. " limit r index;
. Unified' AASHTD t,>10 3-10 4 10 0 40. ::: 200
In Pct Pct _.. Pct
77—Vona sandy loam, 3
to 5 percent slopes
Vona 0-6 `Sandy loam SM,SC- A-2,A-4 0 0 100 100 60-70 30-40 20-25 NP-5
SM •6-28 *Fine sandy loam,Sandy SC,SC- A-4,A-2 0 0 100 90-100 60-90 30-45 20-30 NP-10
loam SM,
SM
28-60 *Sandy loam, Loamy SC-SM, A-4,A-2 0 0 100 90-100 50-85 15-40 20-25 NP-5
1 sand,loamy fine sand SM
Data Source Information
Soil Survey Area: Weld County, Colorado, Southern Part
Survey Area Data: Version 11, Aug 27, 2009
•
USDA Natural Resources Web Soil Survey 1/7/2010
'a—
Conservation Service National Cooperative Soil Survey Page 5 of 5
drologic Soil Group—Weld County, Colorado, South art
in
i
to
n
(n
o 0
r
529500 529560 529620 529680 529740 529800
010° 18' 58" ry ��.ra�� _n- - _ 40° 18' 581.
■� . _ •• Pi' _ .r -
l
O - . . . . O
CV
CO ` CO
V ' A V
• 1
r
O - - 1 `1 - O
. iii .
•
•
' t ''
1" t' ,
,
4
;/ f-
di fril
( Sp. 1 �, ._
' r' t p•
• .vI ■
I 1 =.L i _
•
CO , •
t.,+ :
r lu• s:-
✓ 'I .... :-- i, I
_ l it i
• ,
•
441 *dr
(V :' • t..1 (N
CO t . . ( . . . CO
0.1
CO _ it
s ' ((D
I II' ,o- r {
i
• i
I eCl •
•
coO ' �(, '( co it3 ta
CO .CV f (C7
✓ i� C
' 1
•
5
,
tI •. . , t
1
'1•o jr•rls • 11-c 3
sw
V — __ ._ ._ _..--- - ---- ....��. q
v ,
- _. - . . r - - 1 _ . .* t.
•
• -►_
I
O ..E o
v- r
N a r ;
' `` � _
�' • s •• -
40° 18' 42" � -- — �- - 4C' - , t4
529500 529560 529620 529680 529740 529800
• a, Map Scale: 1 :2,350 if printed on A size (8.5" x 11") sheet
in
• NA Meters
o 0 20 40 80 120 O
Feet
0 50 100 200 300
USDA Natural Resources Web Soil Survey 1 /13/2010
Conservation Service National Cooperative Soil Survey Page 1 of 4
•
• Hydrologic Soil Group—Weld County,Colorado, Southern Part •
MAP LEGEND MAP INFORMATION
Area of Interest(AOI) Map Scale: 1:2,350 if printed on A size(8.5"x 11")sheet.
L Area of Interest(AO!) The soil your surveys that compriseAOI were map
ped p at 1:24,000.
Soils Please rely on the bar scale on each map sheet for accurate map
I Soil Map Units measurements.
Soil Ratings Source of Map: Natural Resources Conservation Service
El A Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov •
n NDCoordinate System: UTM Zone 13N NAD83
B This product is generated from the USDA-NRCS certified data as of
the version date(s)listed below.
ri B/D
Soil Survey Area: Weld County,Colorado,Southern Part
C Survey Area Data: Version 11,Aug 27,2009
® CID Date(s)aerial images were photographed: 8/6/2005
D The orthophoto or other base map on which the soil lines were
Not rated or not available compiled and digitized probably differs from the background
imagery displayed on these maps.As a result,some minor shifting
Political Features of map unit boundaries may be evident.
• Cities
Water Features
Intj Oceans
Streams and Canals
Transportation
_.__ Rails
N Interstate Highways •
.. US Routes
Major Roads
N Local Roads
USDA Natural Resources Web Soil Survey 1/13/2010
ar .��:....ce...:,.e xi...:,.....'r............:....c..a c,..,..., n___ ..
Hydrologic Soil Group—Weld County,Colora outhern Part •
• Hydrologic Soil Group
Hydrologic Soil Group—Summary by Map Unit—Weld County,Colorado,Southern Part
Map unit symbol Map unit name Rating Acres In AOI Percent of AOI
13 Cascajo gravelly sandy loam, 5 A 7.6 45.4%
to 20 percent slopes
47 Olney fine sandy loam, 1 to 3 B 0.0 0.2%
percent slopes
77 Vona sandy loam,3 to 5 percent B 9.2 54.4%
slopes
Totals for Area of Interest 16.8 100.0%
Description
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive precipitation
from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
• three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential)when thoroughly
wet. These consist mainly of deep, well drained to excessively drained sands or
gravelly sands. These soils have a high rate of water transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well drained
soils that have moderately fine texture to moderately coarse texture. These soils
have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture.These soils have a slow rate of water
transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential)when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay layer
at or near the surface, and soils that are shallow over nearly impervious material.
These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in their
natural condition are in group D are assigned to dual classes.
•
USDA Natural Resources Web Soil Survey 1/13/2010
a Conservation Service National Cooperative Soil Survey Page 3 of 4
Hydrologic Soil Group—Weld County,Colora outhern Part •
• Rating Options
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Lower
•
•
USDA Natural Resources Web Soil Survey 1/1 312 01 0
a Conservation Service National Cooperative Soil Survey Page 4 of 4
Hello