HomeMy WebLinkAbout20193960.tiff400 26' 11" N
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A
Soil Map —Weld County, Colorado, Southern Part
(Rezoning Parcel)
528400
Map Scale: 1:41490 if printed on A landscape (11" x 8.5") sheer.
Meters
o 50 100 200 300
528500
Feet
0 200 400 800 1200
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: liTMI Zone 13N WG584
528700
528800
528900
529000
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(N
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8
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404 26' 11" N
400 25' 50" N
USDA Natural Resources
a Conservation Service
Web Soil Survey
National Cooperative Soil Survey
1/28/2019
Page 1 of 3
Soil Map —Weld County, Colorado, Southern Part
(Rezoning Parcel)
MAP LEGEND
Area of Interest (AOI)
Area of Interest (AOI0
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
0 Soil Map Unit Points
Special Point Features
to
ti
ur
14
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
0
0
a
it le
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
.Het Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
MAP IN FORMATION
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Weld County, Colorado, Southern Part
Survey Area Data: Version 17, Sep 10, 2018
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jul 17, 2015 —Oct 2,
2017
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.
USDA Natural Resources
a Conservation Service
Web Soil Survey
National Cooperative Soil Survey
1/28/2019
Page 2 of 3
Soil Map —Weld County, Colorado, Southern Part
Rezoning Parcel
Map Unit Legend
Map Unit Symbol
Map Unit Name
Acres in Aol
Percent of AOI
1
Altvan
slopes
loam, 0 to 1
percent
8.2
10.6%
8
Ascalon
slopes
loam, 0 to 1
percent
25.2
32.7%
21
Dacono
clay loam,
percent slopes
0 to 1
1.1
1.4%
22
Dacono
clay loam,
percent slopes
1 to 3
2.1
2.7%
32
Kim loam,
slopes
1 to
3
percent
28.7
37.2%
68
Ustic Torriorthents,
steep
moderately
6.0
7.8%
78
Weld
slopes
loam, 0 to 1
percent
5.9
7.6%
Totals for Area of Interest
77.1
100.0%
USDA Natural Resources Web Soil Survey
r Conservation Service National Cooperative Soil Survey
1/28/2019
Page 3 of 3
Map Unit Description ---Weld County, Colorado, Southern Part Rezoning Parcel
Map Unit Description
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 in this
report, 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, soils that are
similar to the named components, and some minor components that differ in use
and management from the major soils.
Most of the soils similar to the major components 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. Some minor
components, however, have properties and behavior 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.
USDA. Natural Resources Web Soil Survey
a Conservation Service National Cooperative Soil Survey
1/28/2019
Page 1 of 12
Map Unit Description ---Weld County, Colorado, Southern Part Rezoning Parcel
Soils that have profiles that are almost alike make up a soil series. All the soils of
a series have major horizons that are similar in composition, thickness, and
arrangement. Soils of a given 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.
Additional information about the map units described in this report is available in
other soil reports, which give properties of the soils and the limitations,
capabilities, and potentials for many uses. Also, the narratives that accompany
the soil reports define some of the properties included in the map unit
descriptions.
Report Map Unit Description
Weld County, Colorado, Southern Part
1—A ltva n loam, 0 to 1 percent slopes
Map Unit Setting
National map unit symbol: 361j
Elevation: 4,500 to 4,900 feet
USDA Natural Resources Web Soil Survey
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Page 2 of 12
Map Unit Description ---Weld County, Colorado, Southern Part Rezoning Parcel
Mean annual precipitation: 14 to 16 inches
Mean annual air temperature': 46 to 48 degrees F
Frost -free period: 130 to 150 days
Farmland classification: Not prime farmland
Map Unit Composition
Altvan and similar soils: 90 percent
Minor components: 10 percent
Estimates are based on observations, descriptions, and transects of
the map unit
Description of Altvan
Setting
Landform: Terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Old alluvium
Typical profile
H1 - 0 to 10 inches: loam
H2 - 10 to 25 inches: clay loam
H3 - 25 to 60 inches: gravelly sand
Properties and qualities
Slope: 0 to 1 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (',sat):
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 in profile: 5 percent
Available water storage in profile: Low (about 5.7 inches)
Interpretive groups
Land capability classification (irrigated): 35
Land capability classification (nonirrigated): 4e
Hydrologic Soil Group: B
Ecological site: Loamy Plains (R067BY002CG)
Hydric soil rating: No
Minor Components
Cascajo
Percent of map unit: 9 percent
Hydric soil rating: No
Aquic haplustolls
Percent of map unit: 1 percent
Landform: Swales
Hydric soil rating: Yes
USDA. Natural Resources Web Soil Survey
a Conservation Service National Cooperative Soil Survey
1/28/2019
Page 3 of 12
Map Unit Description ---Weld County, Colorado, Southern Part Rezoning Parcel
8 Ascalon loam, 0 to 1 percent slopes
Map Unit Setting
National map unit symbol: 2tInq
Elevation: 3,870 to 6,070 feet
Mean annual precipitation: 13 to 16 inches
Mean annual air temperature: 47 to 54 degrees F
Frost -free period: 135 to 160 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Ascalon and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of
the mapunit
Description of Ascalon
Setting
Landform: Terraces
Landform position (three-dimensional): Tread
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Wind -reworked alluvium and/or calcareous sandy
eolian an deposits
Typical profile
Ap - 0 to 6 inches: loam
Btl - 6 to 12 inches: sandy clay loam
Bt2 - 12 to 19 inches: sandy clay loam
B - 19 to 35 inches: fine sandy loam
C - 35 to 80 inches: fine sandy loam
Properties and qualities
Slope: 0 to 1 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Runoff class: Negligible
Capacity of the most limiting layer to transmit water (Ksat):
Moderately high to high (0.60 to 6.00 inlhr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 10 percent
Salinity, maximum in profile: Nonsaline (0.1 to 1.9 mrnhos/cm)
Sodium adsorption ratio, maximum in profile: 1.0
Available water storage in profile: Moderate (about 8.0 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (nonirrigated): 4c
Hydrologic Soil Group: B
USDA. Natural Resources Web Soil Survey
a Conservation Service National Cooperative Soil Survey
1/28/2019
Page 4 of 12
Map Unit Description ---Weld County, Colorado, Southern Part
Rezoning Parcel
Ecological site: Loamy Plains (R067BY002CO)
Hydric soil rating: No
Minor Components
Olnest
Percent of map unit: 10 percent
Landform: Terraces
Landform position (three-dimensional): Tread
Down -slope shape: Linear
Across -slope shape: Linear
Ecological site: Sandy Plains (R067BY024CO)
Hydric soil rating: No
Nunn
Percent of map unit: 5 percent
Landform: Terraces
Landform position (three-dimensional) Tread
Down -slope shape: Linear
Across -slope shape: Linear
Ecological site: Loamy Plains (R007BY002CO)
Hydric soil rating: No
21 Dacono clay loam, 0 to 1 percent slopes
Map Unit Setting
National map unit symbol: 361y
Elevation: 4,550 to 4,070 feet
Mean annual precipitation: 14 to 18 inches
Mean annual air temperature: 48 to 52 degrees F
Frost -free period: 140 to 160 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Dacono and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of
the map unit.
Description of Dacono
Setting
Landform: Terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Mixed alluvium
Typical profile
H1 - 0to 12 inches:
H2- inches.12to21
H3 - 21 to 27 inches
H4 - 7 to 60 inches
clay loam
▪ clay loam
▪ clay loam
▪ very gravelly sand
USDA. Natural Resources
a Conservation Service
Web Soil Survey
National Cooperative Soil Survey
1/28/2019
Page 5 of 12
Map Unit Description ---Weld County, Colorado, Southern Part Rezoning Parcel
Properties and qualities
Slope: 0 to 1 percent
Depth to restrictive featuree. More than 80 inches
Natural drainage class: Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat):
Moderately high (0.20 to 0.60 inlhr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 15 percent
salinity, maximum in profile: Nonsaline to very slightly saline (0.0
to 2.0 mmhoslcm)
Available water storage in profile: Moderate (about 6.3 inches)
Interpretive groups
Land capability classification (irrigated): 2s
Land capability classification (nonirrigated): 3s
Hydrologic Soil Group: C
Ecological site: Clayey Plains (R067BY042CO)
Hydric soil rating: No
Minor Components
Heldt
Percent of map unit: 5 percent
Hydric soil rating: No
Nunn
Percent of map unit: 5 percent
Hydric soil rating: No
Altvan
Percent of map unit: 5 percent
Hydric soil rating: No
22Dacono clay loam, 'I to 3 percent slopes
Map Unit Setting
National map unit symbol: 361z
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
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Dacono and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transacts of
the mapunit
USDA. Natural Resources Web Soil Survey
a Conservation Service National Cooperative Soil Survey
1/28/2019
Page 6 of 12
Map Unit Description ---Weld County, Colorado, Southern Part Rezoning Parcel
Description of Dacono
Setting
Landform: Terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Mixed alluvium
Typical profile
H1 - 0 to 12 inches: clay loam
H2 - 12 to 21 inches: clay loam
H3 - 21 to 27 inches: clay loam
H4 - 27 to 60 inches: very gravelly sand
Properties and qualities
Slope: 1 to 3 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (sa t) :
Moderately high (0.20 to 0.60 iofhr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 15 percent
Salinity, maximum in profile: Nonsaline to very slightly saline (0.0
to 2.0 mmhoslcm)
Available water storage in profile: Moderate (about 6.3 inches)
Interpretive groups
Land capability classification (irrigated): 2e
Land capability classification (nonirrigated): 3s
Hydrologic Soil Group: C
Ecological site: Clayey Plains (R067BY042CO)
Hydric soil rating: No
Minor Components
Altvan
Percent of map unit: 9 percent
Hydric soil rating: No
Nunn
Percent of map unit: 6 percent
Hydric soil rating: No
32 —Kim im loam, -I to 3 percent slopes
Map Unit Setting
National map unit symbol: 362b
Elevation: 4,900 to 5,250 feet
Mean annual precipitation: 13 to 17 inches
Mean annual air temperature: 46 to 52 degrees F
USDA. Natural Resources Web Soil Survey
a Conservation Service National Cooperative Soil Survey
1/28/2019
Page 7 of 12
Map Unit Description ---Weld County, Colorado, Southern Part Rezoning Parcel
Frost -free period: 125 to 150 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Kim and similar soils: 90 percent
Minor components: 10 percent
Estimates are based on observations, descriptions, and transects of
the mapunit.
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
Typical profile
H1 - 0 to 12 inches: loam
H2 - 12 to 40 inches: loam
H3 - 40 to 60 inches: fine sandy loam
Properties and qualities
Slope: 1 to 3 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Runoff class: Very low
Capacity of the most limiting layer to transmit water (sat):
Moderately high to high (0.57 to 5.95 inlhr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 15 percent
Available water storage in profile: Moderate (about 9.0 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (nonirrigated): 4e
Hydrologic Soil Group: A
Ecological site: Loamy Plains (R067BY002CO)
Hydric soil rating: No
Minor Components
Otero
Percent of map unit: 10 percent
Hydric soil rating: No
68—Ustic Torriorthents, moderately steep
Map Unit Setting
National map unit symbol: 3631
USDA. Natural Resources Web Soil Survey
a Conservation Service National Cooperative Soil Survey
1/28/2019
Page 8 of 12
Map Unit Description ---Weld County, Colorado, Southern Part Rezoning Parcel
Elevation: 4,450 to 5,100 feet
Mean annual precipitation: 10 to 16 inches
Mean annual air temperature: 46 to 54 degrees F
Frost -free period: 120 to 160 days
Farmland classification: Not prime farmland
Map Unit Composition
Ustic torriorthents and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of
the mapunit.
Description of Ustic Torriorthents
Setting
Landform: Escarpments, breaks
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Gravelly alluvium
Typical profile
H1 - 0 to 10 inches: gravelly sand
H2 - 10 to 60 inches: gravelly sand
Properties and qualities
Slope: 9 to 15 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Excessively drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat): High to
very high (5.95 to 19.98 inlhr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 5 percent
Salinity, maximum in profile: Nonsaline to very slightly saline (0.0
to 2.0 mmhoslcm)
Available water storage in profile: Very low (about 1.8 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 75
Hydrologic Soil Group: A
Hydric soil rating: No
Minor Components
Columbo
Percent of map unit: 10 percent
Hydric soil rating: No
Eckley
Percent of map unit: 3 percent
Hydric soil rating: No
USDA. Natural Resources Web Soil Survey
a Conservation Service National Cooperative Soil Survey
1/28/2019
Page 9 of 12
Map Unit Description ---Weld County, Colorado, Southern Part Rezoning Parcel
Otero
Percent of map unit: 2 percent
Hydric soil rating: No
78 -Weld loam, 0 to 1 percent slopes
Map Unit Setting
National map unit symbol: 2x0 by
Elevation: 3,600 to 5,750 feet
Mean annual precipitation: 12 to 17 inches
Mean annual air temperature: 46 to 54 degrees F
Frost -free period: 115 to 155 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Weld and similar soils: 80 percent
Minor components: 20 percent
Estimates are based on observations, descriptions, and transects of
the map unit
Description of Weld
Setting
Landfo rn: Interflu ve s
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Interfluve
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Calcareous loess
Typical profile
Ap - 0 to 8 inches. loam
Bt l - B to 12 inches: clay
Bt2 - 12 to 15 inches: clay loam
Btk - 15 to 28 inches: loam
Bk - 28 to 60 inches: silt loam
C 60 to 80 inches: silt loam
Properties and qualities
Slope: 0 to 1 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (ksa t) :
Moderately low to moderately high (0.06 to 0.20 inthr)
th r)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 14 percent
Salinity, maximum in profile: Nonsaline to very slightly saline (0.1
to 2.0 mmhos/cm)
Sodium adsorption ratio, maximum in profile: 5.0
USDA. Natural Resources Web Soil Survey
a Conservation Service National Cooperative Soil Survey
1/28/2019
Page 10 of 12
Map Unit Description ---Weld County, Colorado, Southern Part Rezoning Parcel
Available water storage in profile: High (about 11.3 inches)
Interpretive groups
Land capability classification (irrigated): 2c
Land capability classification (nonirrigated): 3c
Hydrologic Soil Group: C
Ecological site: Loamy Plains (R0676YQ02CO)
Hydric soil rating: No
Minor Components
Colby
Percent of map unit: 8 percent
Landform: Hillslopes
Landfonri position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down -slope shape: Convex
Across -slope shape: Convex
Ecological site: Loamy Plains (R06YBY002CO)
Hydric soil rating: No
Wiley
Percent of map unit: 7 percent
Landform: I n terf1u ves
Landform position (two-dimensional): Shoulder
Landform position (three-dimensional): Side slope
Down -slope shape: Convex
Across -slope shape: Convex
Ecological site: Loamy Plains (R067BY002CO)
Hydric soil rating: No
Keith
Percent of map unit: 3 percent
Landform: In terflu ve s
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Interfluve
Down -slope shape: Linear
Across -slope shape: Linear
Ecological site: Loamy Plains (R06TBY002CO)
Hydric soil rating: No
Baca
Percent of map unit: 2 percent
Landform: Interfluves
Landform position (two-dimensional): Summit, shoulder
Landform position (three-dimensional): Interfluve
Down -slope shape: Linear, convex
Across -slope shape: Linear, convex
Ecological site: Loamy Plains (Ro 7SY0Q2CO)
USDA. Natural Resources Web Soil Survey
a Conservation Service National Cooperative Soil Survey
1/28/2019
Page 11 of 12
Map Unit Description ---Weld County, Colorado, Southern Part Rezoning Parcel
Hydric soil rating: No
Data Source Information
Soil Survey Area: Weld County, Colorado, Southern Part
Survey Area Data: Version 17, Sep 10, 2018
USDA. Natural Resources Web Soil Survey
a Conservation Service National Cooperative Soil Survey
1/28/2019
Page 12 of 12
Dwellings and Small Commercial Buildings ---Weld County, Colorado, Southern Part Rezoning Parcel
Dwellings and Small Commercial Buildings
Soil properties influence the development of building sites, including the selection
of the site, the design of the structure, construction, performance after
construction, and maintenance. This table shows the degree and kind of soil
limitations that affect dwellings and small commercial buildings.
The ratings in the table are both verbal and numerical. Rating class terms
indicate the extent to which the soils are limited by all of the soil features that
affect building site development. Not limited indicates that the soil has features
that are very favorable for the specified use. Good performance and very low
maintenance can be expected. Somewhat limited indicates that the soil has
features that are moderately favorable for the specified use. The limitations can
be overcome or minimized by special planning, design, or installation. Fair
performance and moderate maintenance can be expected. Very limited indicates
that the soil has one or more features that are unfavorable for the specified use.
The limitations generally cannot be overcome without major soil reclamation,
special design, or expensive installation procedures. Poor performance and high
maintenance can be expected.
Numerical ratings in the table indicate the severity of individual limitations. The
ratings are shown as decimal fractions ranging from 0.01 to 1.00. They indicate
gradations between the point at which a soil feature has the greatest negative
impact on the use (1.00) and the point at which the soil feature is not a limitation
(0.00).
Dwellings are single-family houses of three stories or less. For dwellings without
basements, the foundation is assumed to consist of spread footings of reinforced
concrete built on undisturbed soil at a depth of 2 feet or at the depth of maximum
frost penetration, whichever is deeper. For dwellings with basements, the
foundation is assumed to consist of spread footings of reinforced concrete built
on undisturbed soil at a depth of about 7 feet. The ratings for dwellings are based
on the soil properties that affect the capacity of the soil to support a load without
movement and on the properties that affect excavation and construction costs.
The properties that affect the load -supporting capacity include depth to a water
table, ponding, flooding, subsidence, linear extensibility (shrink -swell potential),
and compressibility. Compressibility is inferred from the Unified classification. The
properties that affect the ease and amount of excavation include depth to a water
table, ponding, flooding, slope, depth to bedrock or a cemented pan, hardness of
bedrock or a cemented pan, and the amount and size of rock fragments.
USDA Natural Resources Web Soil Survey
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Page 1of3
Dwellings and Small Commercial Buildings ---'weld County, Colorado, Southern Part Rezoning Parcel
Small commercial bruilding►s are structures that are less than three stories high
and do not have basements. The foundation is assumed to consist of spread
footings of reinforced concrete built on undisturbed soil at a depth of 2 feet or at
the depth of maximum frost penetration, whichever is deeper. The ratings are
based on the soil properties that affect the capacity of the soil to support a load
without movement and on the properties that affect excavation and construction
costs. The properties that affect the load -supporting capacity include depth to a
water table, ponding, flooding, subsidence, linear extensibility (shrink -swell
potential), and compressibility (which is inferred from the Unified classification).
The properties that affect the ease and amount of excavation include flooding,
depth to a water table, ponding, slope, depth to bedrock or a cemented pan,
hardness of bedrock or a cemented pan, and the amount and size of rock
fragments.
Information in this table is intended for land use planning, for evaluating land use
alternatives, and for planning site investigations prior to design and construction.
The information, however, has limitations. For example, estimates and other data
generally apply only to that part of the soil between the surface and a depth of 5
to 7 feet. Because of the map scale, small areas of different soils may be
included within the mapped areas of a specific soil.
The information is not site specific and does not eliminate the need for onsite
investigation of the soils or for testing and analysis by personnel experienced in
the design and construction of engineering works.
Government ordinances and regulations that restrict certain land uses or impose
specific design criteria were not considered in preparing the information in this
table. Local ordinances and regulations should be considered in planning, in site
selection, and in design.
Report Dwellings and Small Commercial Buildings
[Onsite investigation may be needed to validate the interpretations in this table
and to confirm the identity of the soil on a given site. The numbers in the value
columns range from 0.01 to 1.00. The e larger the value, the greater the potential
limitation. The table shows only the top five limitations for any given soil. The soil
may have additional limitations]
Dwellings and Small Commercial Buildings -Weld County, Colorado, Southern Part
Map
symbol and soil
name
Pct. of
map
unit
Dwellings without
basements
Dwellings with basements
Small commercial buildings
Rating class and
limiting features
Value
Rating class and
limiting features
Value
Rating class and
limiting features
value
1-Altvan
loam,
percent slopes
0 to 1
Altvan
90
Not limited
Not limited
Not limited
8
loam,
percent slopes
0 to
—Ascalon
1
Ascalon
85
Not limited
Not limited
Not limited
USDA, Natural Resources
a Conservation Service
Web Soil Survey
National Cooperative Soil Survey
1128/2019
Page 2 of 3
Dwellings and Small Commercial Buildings ---Weld County, Colorado, Southern Part
Rezoning Parcel
Dwellings and Small Commercial Buildings —Weld County, Colorado, Southern Part
Map symbol and soil
name
Pct. of
map
unit
Dwellings without
basements
Dwellings
with basements
Small commercial buildings
Rating class and
limiting features
Value
Rating class and
limiting features
Value
Rating class and
limiting features
Value
21—Dacono
loam,
clay
0 to 1
percent
slopes
Dacono
85
Somewhat limited
Somewhat limited
Somewhat limited
Shrink -swell
0.31
Shrink -swell
0.01
Shrink -swell
0.31
22—Dacono
loam,
clay
1 to 3
percent
slopes
Dacono
85
Somewhat limited
Somewhat limited
Somewhat limited
Shrink -swell
0.31
Shrink -swell
0.01
Shrink -swell
0.31
32
—Kim
loam,
slopes
1 to
percent
Kim
90
Not limited
Not limited
Not limited
68—Ustic
steep
Torriorthents,
moderately
Ustic torriorthents
85
Somewhat limited
Somewhat limited
Very limited
Slope
0.63
Slope
0.63
Slope
1.00
78
loam,
slopes
0 to 1
—Weld
percent
Weld
80
Somewhat limited
Not
limited
Somewhat limited
Shrink -swell
0.02
Shrink -swell
0.02
Data Source Information
Soil Survey Area: Weld County, Colorado, Southern Part
Survey Area Data: Version 17, Sep 10, 2018
USDA Natural Resources Web Soil Survey
Conservation Service National Cooperative Soil Survey
1/28/2019
Page 3 of 3
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