HomeMy WebLinkAbout20132730.tiffUSDA United States
am Department of
Agriculture
4 MRCS
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,
Southern Part
DCP-Monfort 115kV Transmission
Line Project
January 24, 2013
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
individual's 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
Soil Map 5
Soil Map (DCP-Monfort 115 -kV Transmission Line Project) 6
Legend 7
Map Unit Legend (DCP-Monfort 115 -kV Transmission Line Project) 8
Map Unit Descriptions (DCP-Monfort 115 -kV Transmission Line Project) 8
Weld County, Colorado, Southern Part 10
1—Altvan loam, 0 to 1 percent slopes 10
3—Aquolls and Aquents, gravelly substratum 11
8 —Ascalon loam, 0 to 1 percent slopes 12
10—Bankard sandy loam, 0 to 3 percent slopes 13
21—Dacono clay loam, 0 to 1 percent slopes 14
22—Dacono clay loam, 1 to 3 percent slopes 15
32 —Kim loam, 1 to 3 percent slopes 16
50 —Otero sandy loam, 0 to 1 percent slopes 17
51 —Otero sandy loam, 1 to 3 percent slopes 18
53 —Otero sandy loam, 5 to 9 percent slopes 19
68—Ustic Torriorthents, moderately steep 20
78 —Weld loam, 0 to 1 percent slopes 21
85 —Water 23
Soil Information for All Uses 24
Soil Properties and Qualities 24
Soil Erosion Factors 24
K Factor, Whole Soil (DCP-Monfort 115 -kV Transmission Line Project)24
Soil Physical Properties 27
Linear Extensibility (DCP-Monfort 115 -kV Transmission Line Project) 27
References 32
4
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.
5
104' 41' 39
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40°25'35"
A
Custom Soil Resource Report
Soil Map (DCP-Monfort 115 -kV Transmission Line Project)
526500 527000
527500 528000
Map Scale: 1 21.300 if printed on A size (8.5" x 11") sheet
0 200 400
0 500 1,000
800
Feet
2,000 3.000
Meters
1,200
104' 39' 19"
104' 39' 19"
40" 27' 59"
40° 25' 34"
MAP INFORMATION
MAP LEGEND
Map Scale: 1:21.300 if printed on A size (8.5" x 11") sheet.
Very Stony Spot
The soil surveys that comprise your AOI were mapped at 1:24,000.
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Warning: Soil Map may not be valid at this scale.
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Custom Soil Resource Report
Map Unit Legend (DCP-Monfort 115 -kV
Transmission Line Project)
Weld County, Colorado, Southern Part (CO618)
Map Unit Symbol
Map Unit Name
Acres in AOI
Percent of AOI
1 i
3 JAquolls
Altvan loam, 0 to 1 percent slopes
214.6
16.8%
and Aquents, gravelly substratum
147.3
11.5%
8
Ascalon loam, 0 to 1 percent slopes
311.4
24.3%
10
Bankard sandy loam, 0 to 3 percent slopes
7.5
0.6%
21
Dacono clay loam, 0 to 1 percent slopes
36.0
2.8%
22
Dacono clay loam, 1 to 3 percent slopes
1.6
0.1%
32
Kim loam, 1 to 3 percent slopes
357.9
27.9%
50
Otero sandy loam, 0 to 1 percent slopes
99.4
7.8%
51
Otero sandy loam, 1 to 3 percent slopes
31.5
2.5%
53
Otero sandy loam, 5 to 9 percent slopes
39.3
3.1%
68
Ustic Torriorthents, moderately steep
25.3
2.0%
78
Weld loam, 0 to 1 percent slopes
5.0
0.4%
85
Water
4.4
0.3%
Totals for Area of Interest
1,281.1
100.0%
Map Unit Descriptions (DCP-Monfort 115 -kV
Transmission Line Project)
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
8
Custom Soil Resource Report
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, 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.
9
Custom Soil Resource Report
Weld County, Colorado, Southern Part
1—Altvan loam, 0 to 1 percent slopes
Map Unit Setting
Elevation: 4,500 to 4,900 feet
Mean annual precipitation: 14 to 16 inches
Mean annual air temperature: 46 to 48 degrees F
Frost -free period: 130 to 150 days
Map Unit Composition
Altvan and similar soils: 90 percent
Minor components: 10 percent
Description of Altvan
Setting
Landform: Terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Old alluvium
Properties and qualities
Slope: 0 to 1 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
(0.20 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: 5 percent
Available water capacity: Low (about 5.7 inches)
Interpretive groups
Farmland classification: Not prime farmland
Land capability classification (irrigated): 3s
Land capability (nonirrigated): 4e
Hydrologic Soil Group: B
Ecological site: Loamy Plains (R067BY002CO)
Typical profile
0 to 10 inches: Loam
10 to 25 inches: Clay loam
25 to 60 inches: Gravelly sand
Minor Components
Cascajo
Percent of map unit:
Aquic haplustolls
Percent of map unit:
Landform: Swales
9 percent
1 percent
10
Custom Soil Resource Report
3 Aquolls and Aquents, gravelly substratum
Map Unit Setting
Elevation: 4,000 to 7,200 feet
Mean annual precipitation: 12 to 18 inches
Mean annual air temperature: 45 to 55 degrees F
Frost -free period: 80 to 155 days
Map Unit Composition
Aquolls and similar soils: 55 percent
Aquents, gravelly substratum, and similar soils: 30 percent
Minor components: 15 percent
Description of Aquolls
Setting
Landform: Swales, streams, flood plains
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Recent alluvium
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Poorly drained
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.20 to 2.00 in/hr)
Depth to water table: About 6 to 48 inches
Frequency of flooding: Frequent
Frequency of ponding: None
Maximum salinity: Nonsaline to very slightly saline (0.0 to 4.0 mmhos/cm)
Available water capacity: Moderate (about 8.0 inches)
Interpretive groups
Farmland classification: Prime farmland if drained and either protected from flooding
or not frequently flooded during the growing season
Land capability (nonirrigated): 6w
Hydrologic Soil Group: D
Ecological site: Salt Meadow (R067BY035CO)
Typical profile
0 to 48 inches: Loam
48 to 60 inches: Gravelly sand
Description of Aquents, Gravelly Substratum
Setting
Landform: Stream terraces
Down -slope shape: Linear
Across -slope shape: Linear
Custom Soil Resource Report
Parent material: Recent alluvium
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Poorly drained
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to very
high (0.57 to 19.98 in/hr)
Depth to water table: About 6 to 24 inches
Frequency of flooding: Frequent
Frequency of ponding: None
Calcium carbonate, maximum content: 10 percent
Maximum salinity: Nonsaline to slightly saline (0.0 to 8.0 mmhos/cm)
Available water capacity: Moderate (about 6.6 inches)
Interpretive groups
Farmland classification: Prime farmland if drained and either protected from flooding
or not frequently flooded during the growing season
Land capability classification (irrigated): 6w
Land capability (nonirrigated): 6w
Hydrologic Soil Group: D
Ecological site: Salt Meadow (R067BY035CO)
Typical profile
0 to 48 inches: Variable
48 to 60 inches: Very gravelly sand
Minor Components
Bankard
Percent of map unit: 10 percent
Ustic torrifluvents
Percent of map unit: 5 percent
8 —Ascalon loam, 0 to 1 percent slopes
Map Unit Setting
Elevation: 4,500 to 4,900 feet
Mean annual precipitation: 12 to 17 inches
Mean annual air temperature: 46 to 57 degrees F
Frost -free period: 130 to 160 days
Map Unit Composition
Ascalon and similar soils: 85 percent
Minor components: 15 percent
Description of Ascalon
Setting
Landform: Terraces
12
Custom Soil Resource Report
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Alluvium
Properties and qualities
Slope: 0 to 1 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
(0.20 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 10 percent
Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm)
Available water capacity: Moderate (about 8.0 inches)
Interpretive groups
Farmland classification: Prime farmland if irrigated
Land capability classification (irrigated): 2e
Land capability (nonirrigated): 4c
Hydrologic Soil Group: B
Typical profile
0 to 8 inches: Loam
8 to 18 inches: Sandy clay loam
18 to 60 inches: Fine sandy loam
60 to 64 inches: Fine sandy loam
Minor Components
Olney
Percent of map unit: 8 percent
Nunn
Percent of map unit 4 percent
Platner
Percent of map unit: 3 percent
10 Bankard sandy loam, 0 to 3 percent slopes
Map Unit Setting
Elevation: 4,450 to 5,000 feet
Mean annual precipitation: 10 to 14 inches
Mean annual air temperature: 48 to 52 degrees F
Frost -free period: 95 to 160 days
Map Unit Composition
Bankard and similar soils: 85 percent
Minor components: 15 percent
Custom Soil Resource Report
Description of Bankard
Setting
Landform: Low sand ridges, flood plains
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Stratified, recent alluvium
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Somewhat 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: 10 percent
Available water capacity: Low (about 4.5 inches)
Interpretive groups
Farmland classification: Prime farmland if irrigated and the product of I (soil
erodibility) x C (climate factor) does not exceed 60
Land capability classification (irrigated): 4w
Land capability (nonirrigated): 4w
Hydrologic Soil Group: A
Ecological site: Sandy Bottomland (R067BY031 CO)
Typical profile
0 to 4 inches: Sandy loam
4 to 60 inches: Stratified gravelly sand to loam
Minor Components
Mollic fluvaquents
Percent of map unit: 9 percent
Landform: Terraces
Blakeland
Percent of map unit: 6 percent
21 Dacono clay loam, 0 to 1 percent slopes
Map Unit Setting
Elevation: 4,550 to 4,970 feet
Mean annual precipitation: 14 to 18 inches
Mean annual air temperature: 48 to 52 degrees F
Frost -free period: 140 to 160 days
Map Unit Composition
Dacono and similar soils: 85 percent
Minor components: 15 percent
14
Custom Soil Resource Report
Description of Dacono
Setting
Landform: Terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Mixed alluvium
Properties and qualities
Slope: 0 to 1 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 (0.20 to
0.60 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 6.3 inches)
Interpretive groups
Farmland classification: Prime farmland if irrigated
Land capability classification (irrigated): 2s
Land capability (nonirrigated): 3s
Hydrologic Soil Group: B
Ecological site: Clayey Plains (R067BY042CO)
Typical profile
0 to 12 inches: Clay loam
12 to 21 inches: Clay loam
21 to 27 inches: Clay loam
27 to 60 inches: Very gravelly sand
Minor Components
Heldt
Percent of map unit: 5 percent
Nunn
Percent of map unit: 5 percent
Altvan
Percent of map unit: 5 percent
22 Dacono clay loam, 1 to 3 percent slopes
Map Unit Setting
Elevation: 4,550 to 4,970 feet
Mean annual precipitation: 14 to 18 inches
Mean annual air temperature: 48 to 52 degrees F
Custom Soil Resource Report
Frost -free period: 140 to 160 days
Map Unit Composition
Dacono and similar soils: 85 percent
Minor components: 15 percent
Description of Dacono
Setting
Landform: Terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Mixed alluvium
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 (0.20 to
0.60 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 6.3 inches)
Interpretive groups
Farmland classification: Prime farmland if irrigated
Land capability classification (irrigated): 2e
Land capability (nonirrigated): 3s
Hydrologic Soil Group: B
Ecological site: Clayey Plains (R067BY042CO)
Typical profile
0 to 12 inches: Clay loam
12 to 21 inches: Clay loam
21 to 27 inches: Clay loam
27 to 60 inches: Very gravelly sand
Minor Components
Altvan
Percent of map unit: 9 percent
Nunn
Percent of map unit: 6 percent
32 Kim loam, 1 to 3 percent slopes
Map Unit Setting
Elevation: 4,900 to 5,250 feet
16
Custom Soil Resource Report
Mean annual precipitation: 13 to 17 inches
Mean annual air temperature: 46 to 52 degrees F
Frost -free period: 125 to 150 days
Map Unit Composition
Kim and similar soils: 90 percent
Minor components: 10 percent
Description of Kim
Setting
Landform: Alluvial fans, plains
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Mixed eolian deposits derived from sedimentary rock
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 5.95 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 15 percent
Available water capacity: Moderate (about 9.0 inches)
Interpretive groups
Farmland classification: Prime farmland if irrigated
Land capability classification (irrigated): 3e
Land capability (nonirrigated): 4e
Hydrologic Soil Group: B
Ecological site: Loamy Plains (R067BY002CO)
Typical profile
0 to 12 inches: Loam
12 to 40 inches: Loam
40 to 60 inches: Fine sandy loam
Minor Components
Otero
Percent of map unit: 10 percent
50 Otero sandy loam, 0 to 1 percent slopes
Map Unit Setting
Elevation: 4,700 to 5,250 feet
Mean annual precipitation: 12 to 15 inches
Mean annual air temperature: 48 to 52 degrees F
Custom Soil Resource Report
Frost -free period: 130 to 180 days
Map Unit Composition
Otero and similar soils: 85 percent
Minor components: 15 percent
Description of Otero
Setting
Landform: Plains
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Eolian deposits and/or mixed outwash
Properties and qualities
Slope: 0 to 1 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 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 very slightly saline (0.0 to 4.0 mmhos/cm)
Available water capacity: Moderate (about 7.7 inches)
Interpretive groups
Farmland classification: Prime farmland if irrigated and the product of I (soil
erodibility) x C (climate factor) does not exceed 60
Land capability classification (irrigated): 3e
Hydrologic Soil Group: B
Ecological site: Sandy Plains (R067BY024CO)
Typical profile
0 to 12 inches: Sandy loam
12 to 60 inches: Fine sandy loam
Minor Components
Haverson
Percent of map unit: 8 percent
Kim
Percent of map unit: 7 percent
51 Otero sandy loam, 1 to 3 percent slopes
Map Unit Setting
Elevation: 4,700 to 5,250 feet
Mean annual precipitation: 12 to 15 inches
Mean annual air temperature: 48 to 52 degrees F
18
Custom Soil Resource Report
Frost -free period: 130 to 180 days
Map Unit Composition
Otero and similar soils: 85 percent
Minor components: 15 percent
Description of Otero
Setting
Landform: Plains
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Eolian deposits and/or mixed 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 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 very slightly saline (0.0 to 4.0 mmhos/cm)
Available water capacity: Moderate (about 7.7 inches)
Interpretive groups
Farmland classification: Prime farmland if irrigated and the product of I (soil
erodibility) x C (climate factor) does not exceed 60
Land capability classification (irrigated): 3e
Land capability (nonirrigated): 4e
Hydrologic Soil Group: B
Ecological site: Sandy Plains (R067BY024CO)
Typical profile
0 to 12 inches: Sandy loam
12 to 60 inches: Fine sandy loam
Minor Components
Kim
Percent of map unit: 10 percent
Vona
Percent of map unit: 5 percent
53 Otero sandy loam, 5 to 9 percent slopes
Map Unit Setting
Elevation: 4,700 to 5,250 feet
Mean annual precipitation: 12 to 15 inches
19
Custom Soil Resource Report
Mean annual air temperature: 48 to 52 degrees F
Frost -free period: 130 to 180 days
Map Unit Composition
Otero and similar soils: 85 percent
Minor components: 15 percent
Description of Otero
Setting
Landform: Plains
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Eolian deposits and/or mixed outwash
Properties and qualities
Slope: 5 to 9 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 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 very slightly saline (0.0 to 4.0 mmhos/cm)
Available water capacity: Moderate (about 7.7 inches)
Interpretive groups
Farmland classification: Not prime farmland
Land capability classification (irrigated): 4e
Land capability (nonirrigated): 6e
Hydrologic Soil Group: B
Ecological site: Sandy Plains (R067BY024CO)
Typical profile
0 to 12 inches: Sandy loam
12 to 60 inches: Fine sandy loam
Minor Components
Kim
Percent of map unit: 10 percent
Cushman
Percent of map unit: 5 percent
68 Ustic Torriorthents, moderately steep
Map Unit Setting
Elevation: 4,450 to 5,100 feet
Mean annual precipitation: 10 to 16 inches
20
Custom Soil Resource Report
Mean annual air temperature: 46 to 54 degrees F
Frost -free period: 120 to 160 days
Map Unit Composition
Ustic torriorthents and similar soils: 85 percent
Minor components: 15 percent
Description of Ustic Torriorthents
Setting
Landform: Escarpments, breaks
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Gravelly alluvium
Properties and qualities
Slope: 9 to 15 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Excessively drained
Capacity of the most limiting layer to transmit water (Ksat): High to very high (5.95
to 19.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 5 percent
Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm)
Available water capacity: Very low (about 1.8 inches)
Interpretive groups
Farmland classification: Not prime farmland
Land capability (nonirrigated): 7s
Hydrologic Soil Group: A
Typical profile
0 to 10 inches: Gravelly sand
10 to 60 inches: Gravelly sand
Minor Components
Columbo
Percent of map unit: 10 percent
Eckley
Percent of map unit: 3 percent
Otero
Percent of map unit: 2 percent
78 Weld loam, 0 to 1 percent slopes
Map Unit Setting
Elevation: 4.850 to 5,000 feet
Custom Soil Resource Report
Mean annual precipitation: 13 to 17 inches
Mean annual air temperature: 46 to 55 degrees F
Frost -free period: 100 to 155 days
Map Unit Composition
Weld and similar soils: 80 percent
Minor components: 20 percent
Description of Weld
Setting
Landform: Plains
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Eolian deposits
Properties and qualities
Slope: 0 to 1 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
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: 6 percent
Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm)
Available water capacity: High (about 10.2 inches)
Interpretive groups
Farmland classification: Prime farmland if irrigated
Land capability classification (irrigated): 2s
Land capability (nonirrigated): 3e
Hydrologic Soil Group: C
Ecological site: Loamy Plains (R067BY002CO)
Typical profile
0 to 8 inches: Loam
8 to 15 inches: Clay
15 to 60 inches: Silt loam
60 to 64 inches: Silt loam
Minor Components
Keith
Percent of map unit: 9 percent
Platner
Percent of map unit: 6 percent
Wiley
Percent of map unit: 5 percent
Custom Soil Resource Report
85 Water
Map Unit Composition
Water: 95 percent
Minor components: 5 percent
Minor Components
Aquolls
Percent of map unit: 5 percent
Landform: Marshes
Soil Information for All Uses
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 Erosion Factors
Soil Erosion Factors are soil properties and interpretations used in evaluating the soil
for potential erosion. Example soil erosion factors can include K factor for the whole
soil or on a rock free basis, T factor, wind erodibility group and wind erodibility index.
K Factor, Whole Soil (DCP-Monfort 115 -kV Transmission
Line Project)
Erosion factor K indicates the susceptibility of a soil to sheet and rill erosion by water.
Factor K is one of six factors used in the Universal Soil Loss Equation (USLE) and the
Revised Universal Soil Loss Equation (RUSLE) to predict the average annual rate of
soil loss by sheet and rill erosion in tons per acre per year. The estimates are based
primarily on percentage of silt, sand, and organic matter and on soil structure and
saturated hydraulic conductivity (Ksat). Values of K range from 0.02 to 0.69. Other
factors being equal, the higher the value, the more susceptible the soil is to sheet and
rill erosion by water.
"Erosion factor Kw (whole soil)" indicates the erodibility of the whole soil. The
estimates are modified by the presence of rock fragments.
24
Custom Soil Resource Report
Map —K Factor, Whole Soil (DCP-Monfort 115 -kV Transmission Line Project)
Ers
526000
40" 27' 59"
i1 25' 35"
0 200 400
800
Feet
500 1,000 2,000 3,000
52/500 528000
52,500 528000
Meters
1200
Map Scale: 1:21,300 if printed on A size (8.5" x 11") sheet.
40° 27' 59"
40' 25' 34"
Custom Soil Resource Report
z
0
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Map Scale: 1:21,300 if printed on A size (8.5" x 11") sheet.
Interstate Highways
Area of Interest (AOI)
The soil surveys that comprise your AOI were mapped at 1:24,000.
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Streams and Canals
Transportation
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Custom Soil Resource Report
Table —K Factor, Whole Soil (DCP-Monfort 115 -kV Transmission
Line Project)
K Factor, Whole Soil— Summary by Map Unit — Weld County, Colorado, Southern Part (CO618)
Map unit symbol
Map unit name
Rating
Acres in AOI
Percent of AOI
1
Altvan loam, 0 to 1 percent slopes
.28
214.6
16.8%
3
Aquolls and Aquents, gravelly substratum
.24
147.3
11.5%
8
Ascalon loam, 0 to 1 percent slopes
.28
311.4
24.3%
10
Bankard sandy loam, 0 to 3 percent slopes
.24
7.5
0.6%
21
Dacono clay loam. 0 to 1 percent slopes
.17
36.0
2.8%
22
Dacono clay loam, 1 to 3 percent slopes
.17
1.6
0.1%
32
Kim loam, 1 to 3 percent slopes
.37
357.9
27.9%
50
Otero sandy loam. 0 to 1 percent slopes
.28
99.4
7.8%
51
Otero sandy loam, 1 to 3 percent slopes
.28
31.5
2.5%
53
Otero sandy loam, 5 to 9 percent slopes
.28
39.3
3.1%
68
Ustic Torriorthents, moderately steep
.10
25.3
2.0%
78
Weld loam, 0 to 1 percent slopes
.24
5.0
0.4%
85
Water
4.4
0.3%
Totals for Area of Interest
1,281.1
100.0%
Rating Options —K Factor, Whole Soil (DCP-Monfort 115 -kV
Transmission Line Project)
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie -break Rule: Higher
Layer Options: Surface Layer
Soil Physical Properties
Soil Physical Properties are measured or inferred from direct observations in the field
or laboratory. Examples of soil physical properties include percent clay, organic
matter, saturated hydraulic conductivity, available water capacity, and bulk density.
Linear Extensibility (DCP-Monfort 115 -kV Transmission
Line Project)
Linear extensibility refers to the change in length of an unconfined clod as moisture
content is decreased from a moist to a dry state. It is an expression of the volume
change between the water content of the clod at 1/3- or 1/10 -bar tension (33kPa or
27
Custom Soil Resource Report
10kPa tension) and oven dryness. The volume change is reported as percent change
for the whole soil. The amount and type of clay minerals in the soil influence volume
change.
For each soil layer, this attribute is actually recorded as three separate values in the
database. A low value and a high value indicate the range of this attribute for the soil
component. A "representative" value indicates the expected value of this attribute for
the component. For this soil property, only the representative value is used.
28
40° 25' 35"
104°41'39"
104' 41' 40"
A
Custom Soil Resource Report
Map —Linear Extensibility (DCP-Monfort 115 -kV Transmission Line Project)
526500 527000
527500 528000
Map Scale: 1:21,300 if printed on A size (8.5" x 11") sheet.
0 200 400 800
Feet
0 500 1,000 2,000 3,000
Meters
1,200
z
bs
e)
sa
40° 27' 59"
Custom Soil Resource Report
Z
O
p
Q
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2
MAP LEGEND
Map Scale: 1:21,300 if printed on A size (8.5" x 11") sheet.
Area of Interest (AO')
Area of Interest (AOI)
The soil surveys that comprise your AOI were mapped at 1:24,000.
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Transportation
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Custom Soil Resource Report
Table —Linear Extensibility (DCP-Monfort 115 -kV Transmission
Line Project)
Linear Extensibility— Summary by Map Unit — Weld County, Colorado, Southern Part (CO618)
Map unit symbol
Map unit name
Rating (percent)
Acres in AOI
Percent of AOI
1
Altvan loam, 0 to 1 percent slopes
1.5
214.6
16.8%
3
Aquolls and Aquents, gravelly substratum
1.5
147.3
11.5%
8
Ascalon loam, 0 to 1 percent slopes
1.5
311.4
24.3%
10
Bankard sandy loam, 0 to 3 percent slopes
1.5
7.5
0.6%
21
Dacono clay loam, 0 to 1 percent slopes
3.3
36.0
2.8%
22
Dacono clay loam, 1 to 3 percent slopes
3.3
1.6
0.1%
32
Kim loam, 1 to 3 percent slopes
1.5
357.9
27.9%
50
Otero sandy loam, 0 to 1 percent slopes
1.5
99.4
7.8%
51
Otero sandy loam, 1 to 3 percent slopes
1.5
31.5
2.5%
53
Otero sandy loam, 5 to 9 percent slopes
1.5
39.3
3.1%
68
Ustic Torriorthents, moderately steep
1.5
25.3
2.0%
78
Weld loam, 0 to 1 percent slopes
4.3
5.0
0.4%
85
Water
4.4
0.3%
Totals for Area of Interest
1,281.1
100.0%
Rating Options —Linear Extensibility (DCP-Monfort 115 -kV
Transmission Line Project)
Units of Measure: percent
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie -break Rule: Higher
Interpret Nulls as Zero: No
Layer Options: All Layers
31
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://www.glti.nrcs.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/
32
Custom Soil Resource Report
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210.
33
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