HomeMy WebLinkAboutCustom Soils Resource Reportc
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USDA United States
~ Department of
Agriculture '°' NRCS
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
Agricu ltura l Experiment
Stations , and rocal
participants
Custom Soil Resource
Report for
Douglas-Plateau Area,
Colorado, Parts of Garfield
and Mesa Counties
Oxy Pond G Facility
May 28, 2013
Preface
Soil surveys contain info rm ation that affects land use planning in survey areas. They
highlight soil limitations that affect various land uses and provide infor mation about
the properties of the sons in the survey areas. So il surveys are designed for many
different users, includ ing farmers, ranchers, foresters, agronomists, urban planners,
community officials, engineers, deve lopers, bu ilders, and home buyers . Also ,
conservationists, teachers, students, and spec ialists in recreation, waste disposal,
and pol tution control can use the surveys to he lp them understand, protect, or en hance
the environment.
Various land use regu lations of Federal , State , and loca t governments may impose
special restrictions on land use or lan d treatment. Soi l surveys identify soil properties
that are used in making various land use or land treatment decisions. The info rmation
is intended to help the land users identify and reduce the effects of so il limitations on
various land uses. The landowner or user is respons ible for identifying and comply ing
with existing laws and regulations .
Although soil survey informati on can be used for general farm , local, and wider area
planning, onsite investigation is needed to supplement this information in some cas es.
Examples include soil quality assessments (http://soils.usda.gov/sqi/) and certa in
conservation and engineering applications. For more detailed informatron, contact
your local USDA Service Cente r (http://offices.sc.egov.usda.gov/locator/app?
agency=nrcs ) or your NRCS State SolJ Scientist (http://soils.usda.gov/contact/
state_ offices /).
Great differences in soil properties can occur with in short distances. Some so ils are
seasonally wet or subject to flood ing. Some are too unstable to be used as a
foundation for buildings or roads . Clayey or wet soils are poorly suited to use as sep ti c
tank absorption fields. A hrgh water table makes a so il poorly suited to basements Of
underground installations.
The National Cooperative Soil Survey is a j oint effort of the United States Department
of Agriculture and other Federal agencies, State age ncies includ i ng the Agricultural
Experiment Stations, and local agencies. The Natural Resources Conservation
Service (NRCS) has leadership for the Federal part of the National Cooper ative Sol l
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 stte for the officia l soil survey information.
The U.S. Department of Agriculture (USDA) proh ibits discrimination in all its programs
and activities on the basis of race, colOf, national origin, age, dis ab ility , and where
applicable, sex, marital status . familia l status. parental status, r eri gion, sexual
orientation, genetic informatio n, political be liefs , 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 requ ire alternative means
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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.
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Contents
Prefac e ... , .......................................................................................................................................................... "2
How Soil Survey s Are Made ...•.....•...•..•................................................................• 5
Sol l Map ..................................................................... t!•··· ................. , ................................................................................. 7
Sol Map .................................................................................................................................... , ............................................................ 8
legend ................................................................................. ~ ........................... ., ................................. i ............................• 9
Map U n ~ Legend ..................................................................................................................................................... 1 O
Map Un" Oescrip1 ions .................................................. , ........ 11 ......... , ........................................................... 1 O
Dou glas-Ptatea u Atea, Colorad o, Parts of Garfiefd and Mesa Counties ........ 12
52-Northwater-Adel compl ex, 5 to 50 percent sl ope$ ..••.•••....................... 12
57-Para ch ute -Rhone loams, 5 to 30 percent sl opes ..•...•.••..•..•..•.....•..••.... 13
Soil Inform ati on fo r AH Uses ............................................................................... 15
Suitabllities and l lrnffations for Use .................................................................... 15
Buil ding Slte Oev etopm en t. ............................................................................. 15
Co rrosion of Ste el .......................................................................................... ,, ............................................ 15
Co rrosio n of Concrete ................................................................................. 19
Soll Propertie s and OuaUlies ............................................................................. .24
Wate r Feat ure s ...................................................................... ~ .... r, ............... * ............. , ........... , ........................... 24
Fl ood ing Freq uency Cla ss ......... r r• ••• r••· ..... , ...................................................... 5 ................ ..24
Re ferences ................ r• ........ ·~ .................................................................. ., ................................................... 5 ...................... 29
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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 geographicatty 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 Jandform. 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 sell 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).
Taxonomlc 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
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Custom Soil Resource Report
Individual soils with simila r soils in the same taxonomic c lass in other areas so that
they could confirm data and assemble additiona• data based on experience and
research .
The obj ective of soil mapping is not to delineate pure map un it components; the
obj ective is to separate the landscape into landforms or landform segments that have
simila r u se and management req uirements. Each map unit is defined by a unique
combinati on of soil compo nents and/or miscellaneous areas in predictable
proporti ons . Some components may be highly contrasti ng to the other components of
the map unit. The presence of minor components in a map unit in no way dimin ishes
the use fu lness 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 intensw e use of small areas is planned , onsite investigation is
needed to define and locate the soils and miscellaneous areas.
Soil scientists make many fie ld observations in the process of producing a soil map.
The frequency of observation is dependent upon severa l factors, includi ng scale of
mappin g . intensity of mapping, design of map un its, complex ity of the landscape, and
experience o f the soil sci entist. Observations a1e made to test and refine the soil-
landscape model and pred ictions and to verify the classification of the soils at specific
locations. Once the soi l-tandscape model is refined , a signifi cantly smaller number of
measurements of individual soil properties a re made and recorded . These
measurements may i nclude field measurements , such as those fo r color, depth to
bedrock, and texture, and laboratory measurements, such as those for content of
sand , s il t, clay, salt, and other components. P roperties of each soU typically vary from
one point to another across the landscape.
Observations fo r map unit components af e 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. Vatues for some properties are estimated from combinations of other
properties.
Whil e a soil survey is in progress, samples of some of the soils i n the area generally
are collected for laboratory analyses and for engineering tests. So il scientists interpret
the data from these a nalyses and tests as weU as the field-observed characteristics
and the soil properties to determine the expected behavior of the soi ls under differe nt
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 sou rces, such as resea rch information ,
production records, and field experience of special ists. For example, d ata 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 predictabte from year to year. For example, soil
scientists can predict with a fai rl y high degree of accuracy that a given soil will have
a high water table with in 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 identifi ed 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 photogr aphs show trees, buildings, field s ,
roads, and rivers, all of which help in locating boundaries accurately.
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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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39'31 '26"
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Custom Soi l Resource Report
Soil Map
Map Scale: t :1 980 t prilled on A size (8.5" x 11·1 sheel
Meters
0 15 30 60 90
Feel
0 50 100 200 300
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MAP LEGEND
Area of Interest (AOI) ~ Very Stony Spot
D Area of Interest (AOI) ' Wei Spot
Soils
_J Soil Map Units
~ Other
Special Polnl Fealures
Spech1t Une Features
" ..... -Gully
\!.) Blowout ...
181 Borrow Pit
... Short Sleep Slope
* Cl11ySpol ~ Other
Pollllcal FealUA!S • Closed Depression 0 Cities
x Gravel Pit W11ter FHtures
.. Gravelly Spot .,-...-Stre11ms and Canals
G Landfill Transportation
A Lava Flow :+++ Rails
~ M81Sh or swamp
,,,,,. Interstate Highways
~ Mine or Quarry ......... US Routes
® Miscellaneous Water ~ Major Roads
® Perennial Waler :.-v Local Roads
v Rocle Outcrop
+ Saline Spot
Sandy Spot
~ Severely Eroded Spot
~ Sinkhole
l> Slide or Slip
~ Sadie Spot
ii! Spoil Area
0 Stony Spot
MAP INFORMATION
Map Scale: 1 :1,980 if printed on A size (B.5• x 11") sheet.
The soil surveys lhal comprise your AOI were mapped at 1:24,000.
Warning: Soil Map may nol be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil line
placement. The maps do not show the small areas of contrasting
soils that could have been shown at a more detailed scale.
Please rely on the bar scale on each map sheet for accurate map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov
Coordinate System: UTM Zone 12N NAD83
This product is generated from the USDA·NRCS certified data as of
the version date(s) listed below.
Soil Survey Area: Douglas·Plateau Area, Colorado, Parts of
Garfield and Mesa Counties
Survey /Vea Data: Version 5, Feb 1, 2008
Date(s) aerial image& were photographed: 8129/2005
The orthophoto or other base map on which the soil Hnea were
compiled and digitized probably differs from the background
Imagery displayed on these maps. As a reaun, some minor shifting
of map unit boundaries may be evident.
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Custom Soil Resource Report
Map Unit Legend
Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties (C0682)
Map Unit Symbol Map Unit Name Acres lnAOI I Percent of AOI
52 Northwater-Adel complex, 5 to 50 percent 0.4
slopes
57 Parachute-Rhone loams, 5 to 30 percent slopes 19 2 ~
Tota'5 for Area of Interest 19.7
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 un it descriptions, afong with the
maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a so il map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map un it is identified and named
according to the taxonomic c lassification of the dominant soil s. W tthi n a taxonomic
class there are precisely defined tim its for the properties of the soils. On the landscape,
however, the soils are natural phenomena, and they have the character istic 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 a f eas of other taxonomic
classes. Con sequently, every map unit is made up of the soils or miscellaneous areas
for which it is named and some minor components that belong lo taxonomic classes
other than those of the maj or soils.
Most minor soils have properties s imilar to those of the domina nt soil or soil s in the
map unit, and thus they do not affect use and ma nagement. 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 enoug h to affect use or to require different
management. These are called contrast ing, o r dissimilar. components. They generally
are in small areas and cou ld not be mapped separately because of the scale used.
Some small areas of strong ly contrasting soils or miscellaneous areas are identified
by a special symbol on the maps. lf included in the database for a given area, the
contrasting minor components are identified in the map unit descriptions al ong 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 m iscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the usefulness
or accu racy of the data. The objective of mapping is not to delineate pure taxonomic
classes b ut rather to separate the landscape into la ndforms or landform segments that
h ave similar use and management requireme nts. T he delineation of such segments
on the map provides sufficient information for the development of resource plans. If
intensive use of small ar eas is planned , however, onsite investigation is needed to
define and locate the soils a n d miscellaneo us areas.
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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, O
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, O 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, ls an example.
Some surveys include miscellaneous areas. Such areas have little or no soil material
and support little or no vegetation. Rock outcrop is an example.
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Custom SoD Resource Report
DouglasRPlateau Area, Colorado, Parts of Garfield and Mesa Counties
52-Northwater-Adel complex, 5 to 50 percent slopes
Map Unit Setting
Elevation : 7 ,700 to 8,400 feet
Mean annual precipitation: 18 to 25 inches
Mean annual air temperature : 36 to 40 degrees F
Frost-free period: 45 to 75 days
Map Unit Composition
Norlhwater and sim ilar so;Js ; 50 percent
Adel and similar soils : 40 percent
Description of Northwater
Setting
Landform; Mountainsides
Landform position (two-dimensional): Footslope, backslope, toeslope
Landform position (three-dimensional); Mountainflank
Down-slope shape: Concave
Across-slope shape: Linear
Parent material: Coll uvium derived from sedimentary rock and/or residuum
weathered from sedimentary rock
Properties and qualities
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Slope; 5 to 50 percent 0
Depth to restrictive feature : More than 80 inches
Drainage class: We ll d rained
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to hi gh
(0.60 to 2 .00 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available wa ter capacity: Moderate (about 7 .0 inches)
Interpretive groups
Farmland classification: Not prime farmland
Land capability (nonirrigated): 7e
Hydrologic Soil Group: B
Typical profi le
0 to 28 inc hes: Lo am
28 to 48 inches: Very channery loam
48 to 60 inches: Extremely channery loam
Description of Adel
Setting
Landform: Swales, hill s
Landform position (two-dimensional): Footstope
Landform position (three-dimensional): Base slope
Down-slope s hape: Concave
Across-slope shape: Concave, linear
Parent material: Cobuvium derived from sedimentary rock
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Properties and qualities
Slope: 5 to 50 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 1.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 5 percent
Available water capacity: Very high (about 17.9 inches)
Interpretive groups
Farmland classification: Not prime farmland
Land capability (nonirrigated): 7e
Hydrologic Soil Group: B
Typical profile
Oto 20 inches: Clay loam
20 to 31 inches: Clay loam, loam
31 to 60 inches: Clay loam, loam
57-Parachute-Rhone loams, 5 to 30 percent slopes
Map Unit Setting
Elevation: 7,600 to 8,800 feet
Mean annual precipitation: 18 to 22 inches
Mean annual air temperature: 36 to 40 degrees F
Frost-free period: 45 to 75 days
Map Unit Composition
Parachute and similar soils: 55 percent
Rhone and similar soils: 35 percent
Description of Parachute
Setting
Landform: Mountains
Landform position (two-dimensional): Summit, shoulder
Landform position (three-dimensional): Mountaintop
Down-slope shape: Llnear
Across-slope shape: Convex
Parent material: Hard residuum weathered from sandstone and siltstone
Properties and qualities
Slope: 5 to 30 percent
Depth to restrictive feature: 20 to 40 inches to paralithic bedrock
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)
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Custom Soil Resource Report
Depth to water table: More tha n BO inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity: Very low (about 2.8 inches)
Interpretive groups
Farmland classification : Not prime farmland
Land capability (nonirrigated): 6e
Hydrolagic Soil Group: B
Ecological site: Mountain Loam (R04BAY22BCO)
Typical profile
0 ta 10 inches: Loam
10 to 25 inches: Very chan nery loam
25 to 29 inches: Unweathered bedrock
Description of Rhone
Setting
Landform: Hftls, mountains
Landform position (two-dimensional): Backslope, shoulder, summit, footslope
Landform position (three-dimensional): Mountainflank, s ide slope
Down-slope shape: Concave
Across-slope shape: Concave
Parent material: Colluvium derived from sandstone and shale and/or residu um
weathered from sandstone and shale
Properties and qualities
Slope; 5 to 30 percent
Depth to restrictive feature: 40 to 60 Inches to paralith ic bedrock
Drainage class: Well draine d
Capacity of the most limiting layer to transmit water (Ksat): Moderately low to
moderately high (0.0 6 to 0 .20 in/hr)
Depth to water table: More than BO inches
Frequency of flooding : None
Frequency of ponding: None
Available water capacity: Moderate (about 7.5 inches)
I nterpretive groups
Farmland classification: Not p ri me farmland
Land capability (nonirriga t ed): 6e
Hydrologic Soil Group: B
Ecological s ite: Mountain l oam (R048AY22BCO)
Typical profile
0 to 10 inches: Loa m
10 to 39 inches .· Channery loam
39 to 55 inches: Very channery loam
55 to 59 inches: Unweathered bedrock
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Soil Information for All Uses
Suitabilities and Limitations for Use
The Suitabilities and Limitations for Use section includes various soil interpretations
displayed as thematic maps with a summary table for the soil map units in the selected
area of interest. A single value or rating for each map unit is generated by aggregating
the interpretive ratings of individual map unit components. This aggregation process
is defined for each interpretation.
Building Site Development
Building site development interpretations are designed to be used as tools for
evaluating soil suitability and identifying soil limitations for various construction
purposes. As part of the interpretation process, the rating applies to each soil in its
described condition and does not consider present land use. Example interpretations
can include corrosion of concrete and steel, shallow excavations, dwellings with and
without basements, small commercial buildings, local roads and streets, and lawns
and landscaping.
Corrosion of Steel
"Risk of corrosion" pertains to potential soil-induced electrochemical or chemical
action that corrodes or weakens uncoated steel. The rate of corrosion of uncoated
steel is related to such factors as soil moisture, particle-size distribution, acidity, and
electrical conductivity of the soil. Special site examination and design may be needed
if the combination of factors results in a severe hazard of corrosion. The steel in
installations that intersect soil boundaries or soil layers is more susceptible to
corrosion than the steel in installations that are entirely within one kind of soil or within
one soil layer.
The risk of corrosion is expressed as "low," "moderate," or "high."
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Map-Corrosjon of Steei
Map Scale 1 1,9llll f pmted on A size (8.S" x 11"1 sheet,
Meters
0 15 30 liO 90
Feet
0 50 100 200 300
39"31' 39" )
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MAP LEGEND
Area of Interest (AOll
D Area or lnleresl (AOI)
Solis
_ Soil Map Units
SollRaUngs
D High
D Moderate
D Low
Not rated or not available
PolHlcal Features
• cmes
Water Features
,......,,. Streams and Canals
Transportation
~ ....... Rails -lnlen;tate Highways
.,,....,.. us Routes
~ Major Roads
~ Local Roads
n ()
Custom Soil Resource Report
MAP INFORMATION
Map Scale: 1: 1,980 if pnnted on A size (8.5" " 11 ") sheel.
The soil surveys that comprise your ADI were mapped al 1:24,000.
I Warning: Soil Map may not be valid at this scale.
I Enlargement of maps beyond the scale of mapping can cause
IGm1sunderstanding of the delail of mapping and accuracy of aoil line
placement. The maps do not show the small areas of contrasUng
soils that could have been shown at a more detailed scale.
Plear;e rely on the bar scale on each map sheet for accurate map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov
Coordinate System: UTM Zone 12N NAD83
This product is generated from the USDA-NRCS certified data as of
the version date(s) listed below.
Soil Survey Area: Douglas-Plateau Area, Colorado, Parts of
Garfield and Mesa Counties
Survey Area Data: Version 5, Feb 1, 2008
Date(s) aerial images were photographed: 8129/2005
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.
Custom Soil Resou rce Report
Table-Corrosion of Steel
Corrosion of Steel-Summary by Map Unit -Douglas-Plateau Area. Colorado, Part& of Garfield and Mesa Counties (C0982)
Map unit symbo• Map unit name Rating Acres lnAOI Percent of AOI
52 Northwater-Adel complex , 5 to 50 Moderate 0 .4
percent slopes
57 Parachute-Rhone roams , 5 to 30 Moderate 19.2
percent slopes
; Total s for Area of Interest 19 .7 ·-
Rating Options-Corrosion of Steel
Aggregation Method; Domi nant Condition
Aggregation is the prQCess by which a set of component att ri bute va lues is reduced
to a s ingle value that represents the map unit as a whole .
A map unit is typically composed of one or more "compone nts". A component is either
some type of soi l or some nonsoil entity, e .g ., rock outcrop. For the attribute being
aggregated, the first step of the aggregation process is to derive one attribute value
fo r each of a map un it's components. From th is set of component attributes, the next
step of the aggregation process derives a s ingle va lue that represents the map unit
as a whole. Once a si ng le value for each map unit is derived, a the matic map for soil
map units can be rendered. Aggregation must be done because , on any soil map, map
units are delineated but comp onents are not.
For each of a map unitts components, a correspond ing percent composition is
recorded. A percent composition of 60 indicates that the corresponding component
typica lly makes up approximately 60% of the map uni t. Percent composition is a critical
factor in some, but not all, aggregation methods.
The aggregation method "Dominant Condition" first groups like attribute values for the
components in a map unit. For each group, percent compositron Is set to the sum of
t he percent composition of a ll components partic ipating in that group. These groups
now represent "conditions" rather than components. The attribute value associated
w •th the group with the hi gh est cumulative percent composition is retu rned. •t more
than one group shares the h ighest c u mu laUve percent composition, the corresponding
"Ue-break" rule determines which value shou ld be returned. The "ti e-break'' rule
ind icates whether the lower or higher group valu e should be returned in the case of a
percent composition t ie .
T he result returned by this agg rega tio n method rep resents the dominant condition
thro ughout the map uni t o n ly when no tie has occurred .
Component Percent Cutoff: None Specified
C o mpone nts whose percent composit ion is below the cutoff value will not be
considered. If no cutoff value is specified, all components in the database will be
considered. The data for so me co ntrasti ng soils o f minor extent may not be in the
database. and therefore are not considered.
18
2.3%
97.7%
100.0%
0
0
0
(
0
(
Custom Soil Resource Report
Tie-break Rule: Higher
The tie-break rule indicates which value should be selected from a set of multiple
candidate values, or which value should be selected in the event of a percent
composition tie.
Corrosion of Concrete
"Risk of corrosion" pertains to potential soil-induced electrochemical or chemical
action that corrodes or weakens concrete. The rate of corrosion of concrete is based
mainly on the sulfate and sodium content, texture, moisture content, and acidity of the
soil. Special site examination and design may be needed if the combination of factors
results in a severe hazard of corrosion. The concrete in installations that intersect soil
boundaries or so~ layers is more susceptible to corrosion than the concrete in
installations that are entirely within one kind of soil or within one soil layer.
The risk of corrosion is expressed as "low," "moderate," or "high."
19
39"31' CO"
3~31'20"
~
!:?
~ N
A
Custom Soil Resource Report
Map-Corrosion of Concrete
Map Scale 1 1,980 I pmllld on A size (8 .s· • W) sheet.
Meters
0 15 30 60 90
Feet
0 50 t oo 200 300
. .. ...
!:?
~
~31 '39"
3~31'20"
)
0
0
(\
MAP LEGEND
Area of lntl!fesl (AOll
D Area of lnleresl (AOIJ
Solis
._J Soil Map Unils
SollRaUngs
D High
D Moderate
~ Low
Not rated or not available
PotHlcal Features
e C1Ues
Waler Features
,,.._.. Streams and Canals
Transportation
~ Rails .... -Interstate Highways
.,......,. US Roules
~ Major Roads
~ Local Roads
()
Custom Soil Resource Report
()
MAP INFORMATION
Map Scale: 1:1,980 if prinled on A size (8.5" K 11") sheet.
The soil surveys that comprise your AOI were mapped at 1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil line 1 placement. The maps do not show the small areas of contrasting I
soils that could have been shown at a more detailed scale.
Please rely an the bar scale on each map sheet for accurate map
measurements.
Source of Map: Natural Resources Conservation Service
Web Sail Survey URL: http.f/websoilsurvey.nrcs.usda.gav
Coordinate System: UTM Zane 12N NAD83
This product is generated from the USDA-NRCS certified data as of
the version dale(s) listed below.
Soil survey Area: Douglas-Plateau Area, Colorado, Parts of
Garfield and Mesa Counties
Survey Area Data: Version 5, Feb 1 , 2008
Date(s) aerial images were photographed: 8129/2005
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 resull, some minor shifting
of map unit boundaries may be evident.
Custom Soi l Resou rce Report
Table-Corrosion of Concrete
Corrosion of Concrete-Summary by Map Untt-Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties
tC0682)
Map unit symbol Map unit name Rating Acres lnAOI I Percent of AOI
52 Norlhwater-Adel complex, 5 to 50 1Low 0.4
percent slopes ---
57 Parachute-Rho ne loams, 5 to 30 Low 19.2
percent slopes
Totals for Area of Interest 19.7
Rating Options-Corrosion of Concrete
Aggregation Method: Dominant Conditi on
Aggregation is the process by which a set of component attribute vatues is reduced
to a single value that represents the map unit as a whole.
A map unit is typicall y composed of one or more "components". A component is either
some type of soil or some nonsoft en tity, e.g .• rock outcrop . For the attribute being
aggregated, the first step of the aggr ega ti on process is to derive one attribute value
for each of a map unit's components. From this set of component attri butes, the next
step of the aggregation process d erives a single value that represents the map unit
as a whote. Once a s ingte value for each map unit is derived, a thematic map for soil
map units can be render ed. Aggrega ti on must be done because, o n a ny soil map, map
u nits ar e de ti neated but components are not.
For each of a map unit's components, a correspond ing percent composition is
r ecorded. A percent composition of 60 indicates that the corresponding component
typically makes up approximately 60% of the map unit. Percent composition ts a critical
factor in some, but not all, aggregation methods.
The aggregation method "Dominant Condition'' first groups like attribute values for the
components in a map unit. For each group, percent composition is set to the sum of
the percent composition of all components parti cipating in that group. These groups
now rep resent "cond itions" rather than components. The attribute value associated
with the g roup with the highest cumulative percent composition is returned. If more
than one group shares the highest cumulative percent composition, the corresponding
''tie-break" rule determ ines which value shourd be returned. The "tie-break" rule
indicates whether the rower or higher group value should be returned in the case of a
percent composition tie.
The r es ~ returned by this aggregation method represents the dominant condition
throughout the map unit only when no tie has occurred.
Component Percent Cutoff: None Specified
Compon ents whose percent composition is below the c utoff value w ill not be
consider ed . If no cutoff vatue is specified, all components in the database will be
consider ed. The data fo r some contrasting soils of minor extent may not be in the
database, a nd therefore are not cons idered.
22
2.3%
97.7o/o
100.0%
0
0
0
c
0
0
Custom Soil Resource Report
Tie-break Rule: Higher
The tie-break rule indicates which value should be selected from a set of multiple
candidate values, or which value should be selected in the event of a percent
composition tie.
23
C ustom Soil Resource Report
Soil Properties and Qualities
The Soil Properties and Quali ties section includes various soil properties and qualities
d isplayed as thematic maps with a summary table for the soi l map units i n the selected
area of interest. A single va lue or rating for each map unit is generated by aggregating
the interpretive ratings of individua l map unit components. Th is aggregation process
is defined for each property or qua lity.
Water Features
Water Featu res include ponding frequency, flood ing frequency. and depth to water
table.
Flooding Frequency Class
Flooding is the temporary inundation of an area caused by overflowing streams, by
runoff from adjacent slopes, or by tides. Water standing for short periods after rainfan
or snowmelt is not considered flooding, and water standing in swamps and marshes
is considered ponding rather than flooding .
Frequency is expressed as none, very rare, rare, occasional, frequent, and very
frequent.
"None" means that flooding is not probable. The c hance of flooding is n early 0 percent
in any year. Flooding occurs less than once in 500 years.
"Very rare" means that flood ing is very unlikely b ut possible under extremely unusual
weather conditions. The chance of flooding is less than 1 percent in any year.
"Rare" means that flooding is unli kely but possibl e under unusual weather conditions .
The chance of flooding is 1 to 5 percent in any year.
"Occasional" means that flooding occurs infreq uently un der no rmat weather
conditions . The chance of flooding is 5 to 50 percent in any year.
"Frequent" means that flooding is likely to occur often u nder normat weather
conditions. The chance of flooding is more than 50 percent in a ny year but ts l ess than
50 percent in all months in any year.
"Very frequent" means that flooding is likely to occur very often under normal weather
conditions. The chance of flooding is more than 50 percent in all months of any year.
24
0
0
0
c 39"J1'40-
0
39• 31' 26"
0
Custom Soil Resource Report
Map-Flooding Frequency Class
... ..:=::::::111111---~==:::;iMete~ 0 15 30 60 90 --==-----===::::::1Feel 0 50 100 200 300
39• 31" 311"
0
MAP LEGEND
Area of Interest (AOI)
0 Area of Interest (AOI)
Solis
1 Soil Map Units
SoURaUngs
D None
D VeryRare
D Rare
D 0ccasiona1
D Frequent
• Very Frequent
Polttlcal Features
• Cilies
Water Features
,,,...._ Streams and canals
Transportation .. ' +-tfi
"""' -~
Rails
Interstate Highways
US Routes
Ma.ior Roads
~ Local Roads
Custom Soil Resource Report
0
MAP INFORMATION
Map Scale: 1 :1,980 if printed on A size (8 5" ,. 11") sheet.
The soil surveys that compri se your AOI were mapped at 1:24,000.
Warning: Soll Map may not be valid at thi s scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil line
placement. The maps do not show the small areas of contrasting
s oils that could have been shown al a more detailed scale.
Please rely on the bar scale on each map sheet for accurate map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL: httpJ/websollsurvey.nrcs uada.gov
Coordinate System: UTM Zone 12N NAD83
This product is generated from the USDA-NRCS certified data as of
the version date(s) li sted below
Soll Survey Area: Douglas-Plateau Area, Colorado, Parts of
Garfield and Mesa Counties
Survey Area Data: Version 5, Feb 1, 2008
Dale(s) aerial i mages were photographed: 8/29/2005
The orlhopholo or other base map on which the soil l ines were
compWed and digitized probably differs from the background
imagery displayed on these maps. As a resuJI, some minor shilling
of map unit boundaries may be evident.
0
c
0
c
Custom Soil Resource Report
Table-Flooding Frequency Class
Flooding Frequency Class-Summary by Map Unit -Douglas.Plateau Area, Colorado, Parts of Garfield and Mesa Counties
CC0682)
Map unit symbol Map unit name Rating AcreslnAOI Percent of AOI
52 Northwaler-Adel complex, 5 to 50 None 0.4
percent slopes
57 Parachute-Rhone loams, 5 to 30 None 19.2
percent slopes
Totals for Area of Interest 19.7
Rating Options-Flooding Frequency Class
Aggregation Method: Dominant Condition
Aggregation is the process by which a set of component attribute values is reduced
to a single value that represents the map unit as a whole.
A map unit is typically composed of one or more "components". A component is either
some type of soil or some nonsoil entity, e.g., rock outcrop. For the attribute being
aggregated, the first step of the aggregation process is to derive one attribute value
for each of a map unifs components. From this set of component attributes, the next
step of the aggregation process derives a single value that represents the map unit
as a whole. Once a single value for each map unit is derived, a thematic map for soil
map units can be rendered. Aggregation must be done because, on any soil map, map
units are delineated but components are not.
For each of a map unifs components, a corresponding percent composition is
recorded. A percent composition of 60 indicates that the corresponding component
typically makes up approximately 60% of the map unit. Percent composition is a critical
factor in some, but not all, aggregation methods.
The aggregation method "Dominant Condition" first groups like attribute values for the
components in a map unit. For each group, percent composition is set to the sum of
the percent composition of all components participating in that group. These groups
now represent ·conditions" rather than components. The attribute value associated
with the group with the highest cumulative percent composition is returned. If more
than one group shares the highest cumulative percent composition, the corresponding
"tie-break" rule determines which value should be returned. The "tie-break" rule
indicates whether the lower or higher group value should be returned in the case of a
percent composition tie.
The result returned by this aggregation method represents the dominant condition
throughout the map unit only when no tie has occurred.
Component Percent Cutoff: None Specified
Components whose percent composition is below the cutoff value will not be
considered. If no cutoff value is specified, all components in the database will be
considered. The data for some contrasting soils of minor extent may not be in the
database, and therefore are not considered.
27
2.3%
97.7%
100.0%
Custom Soi.I Resource Report
Tie-break Rule: More Frequent
The tie-break rule ind icates which va lue should be selected from a set of multipte
candidate values, or which value should be selected in the event of a percent
composition tie.
Beginning Month: January
Ending Month: December
28
0
0
0
c
0
c
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 02487-00.
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:l/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:l/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:l/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:l/soils .usda .gov/
United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and maj or land resource areas of the United States, the
Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296.
http:l/soils.usda.gov/
29
Custom Soil Resou rce Report
United States Department of Agriculture . Soil Conservation Service. 1961 . Land
capability classification. U.S . Department of Agriculture Handbook 210.
30
0
0
0