HomeMy WebLinkAbout20010231 EXHIBIT
30
` SOIL SURVEY
grown crops. Unless protected, they are subject to flood- potential for cultivated crops also have good potential for
hg.ab The potential is fair for development of wildlife ran dlopment. Te lidata tfuturelc landils in this
use pat-
terns.
survey can be helpfun planning
12. Nunn-Dacono-Altvan Areas where the soils are so unfavorable that urban
Deep, level and nearly level, well drained foams and clay development is prohibitive are not extensive in the sur-
vey area. Most of the Aquolls-Aquents-Bankard map unit
foams formed in alluvium is on flood plains where flooding and ponding are severe
This level and nearly level map unit is on high terraces limitations. The Loup-Boel unit also is wet and poorly
and alluvial fans throughout the survey area. It makes up drained. The Nunn-Haverson unit is subject to flooding
about 7 percent of the total acreage. About 45 percent is unless protected by dikes. Urban development can be
Nunn soils, 15 percent is Dacono soils, 15 percent is Alt- costly on the strongly sloping, shallow soils in the Mid-
van soils, and 25 percent is soils of minor extent. way-Shingle and the Tassel-Thedalund-Terry units. Many
The soils in this map unit occupy the same relative parts of the Otero-Thedalund-Nelson unit are moderately
positions on the landscape (fig. 3). Nunn soils have a loam sloping soils that have bedrock a few feet below the sur-
or clay loam surface layer and a clay loam subsoil. Dacono face, which makes urban development costly. The clayey
soils have a clay loam surface layer and subsoil. Altvan soils of the Ulm-Nunn and, to a lesser extent, the Nunn-
soils have a loam surface layer and a sandy clay loam or Dacono-Altvan units have poor potential for urban
light clay loam subsoil. Dacono and Altvan soils have sand development because of high shrink-swell potential and
and gravel underlying material between depths of 20 and slow permeability.
40 inches. In large areas of the county are soils that can be
Minor in this unit are the well drained Ascalon, Colom- developed for urban use at lower cost than can the soils
bo, and Olney soils. just mentioned. These include the Olney-Kim-Otero unit,
This map unit is used mainly for irrigated cropland. the Julesburg-Bresser unit, and the Valent-Vona-Osgood
The potential is only fair to poor for urban development. unit. The Olney-Kim and the Julesburg-Bresser units are
he main limitations are shrink swell, low strength, and excellent farmland. This potential should not be over-
slow permeability of the heavier clay loams. The potential looked when broad land uses are considered. The soils in
is fair for the development of openland wildlife habitat. the Valent-Vona-Osgood unit have a sandy surface layer,
but other qualities are favorable for urban development.
13. Julesburg-Bresser The Weld-Colby and the Wiley-Colby-Weld units,
Deep, level and nearly level, well drained sandy loams identified as units 3 and 4 on the general soil map, are ex-
formed in alluvium cellent farmland but have fair or poor potential for urban
This level and nearly level map unit is on the higher development. Weld and Wiley soils have low strength and
terraces along the South Platte River in the west-central a moderate shrink-swell potential.
part of the survey area. It makes up about 1.5 percent of Early potatoes are particularly well suited to soils of
the total acreage. About 45 percent is Julesburg soils, 15 the Julesburg-Bresser map unit. These soils are well
percent is Bresser soils, and 40 percent is soils of minor d and they warm up earlier in spring than the
dravie soils.
extent. The Aquolls-Aquents-Bankard map unit is an excellent
The soils in this map unit occupy the same a relative sanndy source of sand and gravel. Most of the sand and gravel
positions on the landscape. Julesburg soils have a excavations in the survey area are in these soils.
loam surface layer and subsoil. Bresser soils have a sandy
loam surface layer and a sandy clay loam subsoil.
Minor in this unit are the well drained Otero and Olney Soil maps for detailed planning
soils and the excessively drained Valent soils.
This map unit is used mainly for irrigated cropland. The map units shown on the detailed soil maps at the
The potential is good for urban development and fair for back of this publication represent the kinds of soil in the
openland wildlife habitat. survey area. They are described in this section. The
descriptions together with the soil maps can be useful in
Broad land use considerations determining the potential of a soil and in managing it for
food and fiber production; in planning land use and
Deciding what land should be used for urban develop- developing soil resources; and in enhancing, protecting,
ment is an important issue in the survey area. Each year and preserving the environment. More information for
a considerable acreage is developed for urban use in each map unit, or soil, is given in the section "Use and
Greeley and other cities and areas. The general soil map management of the soils."
is most helpful in planning the general outline of urban Preceding the name of each map unit is the symbol that
areas, but it cannot be used in selecting sites for specific identifies the soil on the detailed soil maps. Each soil
urban structures. In general, the soils that have good description includes general facts about the soil and a
2001-0231
4 SOIL SURVEY
tial for urban development is only fair to poor. The main This nearly level to moderately sloping map unit is on
limitations are moderate to high shrink swell, low plains and alluvial fans throughout the survey area. It
strength, and slow permeability. The potential is fair for makes up about 23.5 percent of the total acreage. About
Aevelopment of openland wildlife habitat. 35 percent is Olney soils, 20 percent is Kim soils, 15 per-
cent is Otero soils, and 30 percent is soils of minor extent.
Weld-Colby The soils in this map unit occupy the same relative
Deep, nearly level to moderately sloping, well drained positions on the landscape (fig. 2). Olney soils have a
foams formed in calcareous eolian deposits loamy sand or sandy loam surface layer and a sandy clay
This nearly level to moderately sloping map unit is on loam subsoil. Kim soils have a loam surface layer and
plains mainly in the southeastern part of the survey area. loam and fine sandy loam underlying material. Otero soils
One small area is in the west-central part. The unit makes have a sandy loam surface layer and fine sandy loam un-
up about 10 percent of the total acreage. About 50 per- derlying material.
cent is Weld soils, 35 percent is Colby soils, and 15 per- Minor in this unit are the well drained Ascalon, Nelson,
cent is soils of minor extent. Thedalund, and Vona soils.
Weld soils occupy the broad nearly level areas. Colby This map unit is used for irrigated and nonirrigated
soils occupy the steeper side slopes. Weld soils have a cropland and for rangeland. The potential is good for
loam surface layer and a clay and clay loam subsoil. Colby urban development and fair for wildlife habitat.
soils have a loam surface layer and silt loam underlying 6. Otero-Thedalund-Nelson
material.
Minor in this unit are the well drained Adena and Kim Deep and moderately deep, nearly level to moderately
soils. sloping, well drained sandy loams and clay loams
This map unit is used mainly for cropland. About 65 formed in alluvium and eolian deposits and in residuum
percent is nonirrigated. Winter wheat is the principal from shale and sandstone
crop. If irrigated, the soils are well suited to all commonly This nearly level to moderately sloping map unit is on
grown crops. The potential is fair for development of
openland wildlife habitat. plains in the north-central part of the survey area. It
makes up about 3 percent of the total acreage. About 35
4. Wiley-Colby-Weld percent is Otero soils, 25 percent is Thedalund soils, 25
De nearly level to moderately sloping, percent is Nelson soils, and 15 percent is soils of minor
Deep, well drained silt
extent.
foams and foams formed in calcareous eolian deposits Otero soils are on the nearly level or smoother side
'his nearly level to moderately sloping map unit is on slopes. Thedalund and Nelson soils are intermingled and
reins in the west-central and southwestern parts of the are on the steeper side slopes. Otero soils have a sandy
survey area. It makes up about 5.5 percent of the total loam surface layer and fine sandy loam underlying
acreage. About 30 percent is Wiley soils, 30 percent is material. Thedalund soils have a loam surface layer and
Colby soils, 15 percent is Weld soils, and 25 percent is underlying material. Shale is between depths of 20 anti 40
soils of minor extent. inches. Nelson soils have a fine sandy loam surface layer
Wiley and Colby soils form an intermingled complex and underlying material. Sandstone is between 20 and 40
pattern on the steeper side slopes. Weld soils are along inches,
the narrow ridgetops and on the nearly level side slopes. Minor in this unit are the well drained Kim, Renohill,
Wiley soils have a silt loam surface layer and a silty clay Terry, and Vona soils.
loam subsoil. Colby soils have a loam surface layer and This map unit is used mainly for irrigated cropland. Soil
silt loam underlying material. Weld soils have a loam sur- depth is the main limitation in farming and urban
face layer and a clay loam subsoil. development. The potential is fair for development of
Minor in this unit are the moderately well drained openland wildlife habitat.
Heldt soils and the well drained Nunn and Ulm soils.
This map unit is used mainly for cropland. About 70 7, Tassel-Thedalund-Terry
percent is irrigated and is well suited to all commonly
grown crops. In nonirrigated areas, winter wheat is the Shallow to moderately deep, gently sloping to strongly
principal crop. The potential is fair for urban develop- sloping, well drained sandy foams to clay loans formed
ment. Moderately slow in residuum from sandstone and shale
permeability is the main limita-
tion. The potential is also fair for development of open- This gently sloping to strongly sloping map unit is in
land wildlife. the western part of the survey area, adjacent to and in-
5. Olney-Kim-Otero cluding the sandstone breaks along some of the major
streams. It makes up about 1 percent of the total acreage.
Deep, nearly level to moderately sloping, well drained About 50 percent is Tassel soils, 20 percent is Thedalund
sandy foams and foams formed in mixed alluvium and soils, 20 percent is Terry soils, and 10 percent is soils of
eolian deposits minor extent.
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40
•
SOIL SURVEY
6
grown crops. Unless protected, they are subject to flood- potential for cultivated crops also have good potential for
ing. The potential is fair for development of wildlife urban
can be helpful in planning future land use pat-
dlidt specific l
s in this
habitat. pat-
terns.
12. Nunn-Dacono-Altvan Areas where the soils are so unfavorable that urban
Deep, level and nearly level, well drained loams and clay development is prohibitive are not extensive in the sur-
vey area. Most of the Aquolls-Aquents-Bankard map unit
looms formed in alluvium is on flood plains where flooding and ponding are severe
This level and nearly level map unit is on high terraces limitations. The Loup-Boel unit also is wet and poorly
and alluvial fans throughout the survey area. It makes up drained. The Nunn-Haverson unit is subject to flooding
about 7 percent of the total acreage. About 45 percent is unless protected by dikes. Urban development can be
Nunn soils, 15 percent is Dacono soils, 15 percent is Alt- costly on the strongly sloping, shallow soils in the Mid-
van soils, and 25 percent is soils of minor extent. way-Shingle and the Tassel-Thedalund-Terry units. Many
The soils in this map unit occupy the same relative parts of the Otero-Thedalund-Nelson unit are moderately
positions on the landscape (fig. 3). Nunn soils have a loam sloping soils that have bedrock a few feet below the sur-
or clay loam surface layer and a clay loam subsoil. Dacono face, which makes urban development costly. The clayey
soils have a clay loam surface layer and subsoil. Altvan soils of the Ulm-Nunn and, to a lesser extent, the Nunn-
soils have a loam surface layer and a sandy clay loam or Dacono-Altvan units have poor potential for urban
light clay loam subsoil. Dacono and Altvan soils have sand development because of high shrink-swell potential and
and gravel underlying material between depths of 20 and slow permeability.
40 inches. In large areas of the county are soils that can be
Minor in this unit are the well drained Ascalon, Colour- developed for urban use at lower cost than can the soils
bo, and Olney soils. just mentioned. These include the Olney-Kim-Otero unit,
This map unit is used mainly for irrigated cropland. the Julesburg-Bresser unit, and the Valent-Vona-Osgood
The potential is only fair to poor for urban development. unit. The Olney-Kim and the Julesburg-Bresser units are
The main limitations are shrink swell, low strength, and excellent farmland. This potential should not be over-
slow permeability of the heavier clay loams. The potential looked when broad land uses are considered. The soils in
is fair for the development of openland wildlife habitat. the Valent-Vona-Osgood unit have a sandy surface layer,
but other qualities are favorable for urban development.
13. Julesburg-Bresser The Weld-Colby and the Wiley-Colby-Weld units,
Deep, level and nearly level, well drained sandy looms identified as units 3 and 4 on the general soil map, are ex-
formed in alluvium cellent farmland but have fair or poor potential for urban
This level and nearly level map unit is on the higher development. Weld and Wiley soils have low strength and
terraces along the South Platte River in the west-central a moderate shrink-swell potential.
part of the survey area. It makes up about 1.5 percent of Early potatoes are particularly well suited to soils of
the total acreage. About 45 percent is Julesburg soils, 15 the Julesburg-Bresser map unit. These soils are well
percent is Bresser soils, and 40 percent is soils of minor drained, and they warm up earlier in spring than the.
heavier soils.
extent. - The A uolls-A uents-Bankard map unit is an excellent
The soils in this map unit occupy the same relative q q
positions on the landscape. Julesburg soils have a sandy source of sand and gravel. Most of the sand and gravel
loam surface layer and subsoil. Bresser soils have a sandy excavations in the survey area are in these soils.
loam surface layer and a sandy clay loam subsoil.
Minor in this unit are the well drained Otero and Olney Soil maps for detailed planning
soils and the excessively drained Valent soils.
This map unit is used mainly for irrigated cropland. The map units shown on the detailed soil maps at the
The potential is good for urban development and fair for back of this publication represent the kinds of soil in the
openland wildlife habitat. survey area. They are described in this section. The
descriptions together with the soil maps can be useful in
Broad land use considerations determining the potential of a soil and in managing it for
food and fiber production; in planning land use and
Deciding what land should be used for urban develop- developing soil resources; and in enhancing, protecting,
ment is an important issue in the survey area. Each year and preserving the environment. More information for
a considerable acreage is developed for urban use in each map unit, or soil, is given in the section "Use and
Greeley and other cities and areas. The general soil map management of the soils." that
is most helpful in planning the general outline of urban Preceding the name of each map unit is the symbol
areas, but it cannot be used in selecting sites for specific identifies the soil on the detailed soil maps. Each soil
urban structures. In general, the soils that have good description includes general facts about the soil and a
I
4 SOIL SURVEY
tial for urban development is only fair to poor. The main This nearly level to moderately sloping map unit is on
limitations are moderate to high shrink swell, low plains and alluvial fans throughout the survey area. It
strength, and slow permeability. The potential is fair for makes up about 23.5 percent of the total acreage. About
development of openland wildlife habitat. 35 percent is Olney soils, 20 percent is Kim soils, 15 per-
cent is Otero soils, and 30 percent is soils of minor extent.
3. Weld-Colby The soils in this map unit occupy the same relative
Deep, nearly level to moderately sloping, well drained positions on the landscape (fig. 2). Olney soils have a
learns formed in calcareous eolian deposits loamy sand or sandy loam surface layer and a sandy clay
This nearly level to moderately sloping map unit is on loam subsoil. Kim soils have a loam surface layer and
plains mainly in the southeastern part of the survey area. loam and fine sandy loam underlying material. Otero soils
One small area is in the west-central part. The unit makes have a sandy loam surface layer and fine sandy loam un-
up about 10 percent of the total acreage. About 50 per- derlying material.
cent is Weld soils, 35 percent is Colby soils, and 15 per- Minor in this unit are the well drained Ascalon, Nelson,
cent is soils of minor extent. Thedalund, and Vona soils.
Weld soils occupy the broad nearly level areas. Colby This map unit is used for irrigated and nonirrigated
soils occupy the steeper side slopes. Weld soils have a cropland and for rangeland. The potential is good for
loam surface layer and a clay and clay loam subsoil. Colby urban development and fair for wildlife habitat.
soils have a loam surface layer and silt loam underlying 6. Otero-Thedalund-Nelson
material.
Minor in this unit are the well drained Adena and Kim Deep and moderately deep, nearly level to moderately
soils. sloping, well drained sandy loams and clay loams
This map unit is used mainly for cropland. About 65 formed in alluvium and eolian deposits and in residuum
percent is nonirrigated. Winter wheat is the principal from shale and sandstone
crop. If irrigated, the soils are well suited to all commonly This nearly level to moderately sloping map unit is on
grown crops. The potential is fair for development of plains in the north-central part of the survey area. It
openland wildlife habitat. makes up about
aout 3 percent of the total acreage. About 35
4. Wiley-Colby-Weld percent is Otero soils, 25 percent is Thedalund soils, 25
Deep, nearly level to moderately sloping, well drained silt percent is Nelson soils, and 15 percent is soils of minor
extent.
loams and learns formed in calcareous eolian deposits
Otero soils are on the nearly level or smoother side
This nearly level to moderately sloping map unit is on slopes. Thedalund and Nelson soils are intermingled and
plains in the west-central and southwestern parts of the are on the steeper side slopes. Otero soils have a sandy
survey area. It makes up about 5.5 percent of the total loam surface layer and fine sandy loam underlying
acreage. About 30 percent is Wiley soils, 30 percent is material. Thedalund soils have a loam surface layer and
Colby soils, 15 percent is Weld soils, and 25 percent is underlying material. Shale is between depths of 20 aift 40
soils of minor extent. inches. Nelson soils have a fine sandy loam surface layer
Wiley and Colby soils form an intermingled complex and underlying material. Sandstone is between 20 and 40
pattern on the steeper side slopes. Weld soils are along inches.
the narrow ridgetops and on the nearly level side slopes. Minor in this unit are the well drained Kim, Renohill,
Wiley soils have a silt loam surface layer and a silty clay Terry, and Vona soils.
loam subsoil. Colby soils have a loam surface layer and This map unit is used mainly for irrigated cropland. Soil
silt loam underlying material. Weld soils have a loam sur- depth is the main limitation in farming and urban
face layer and a clay loam subsoil. development. The potential is fair for development of
Minor in this unit are the moderately well drained openland wildlife habitat.
Heldt soils and the well drained Nunn and Ulm soils.
This map unit is used mainly for cropland. About 70 7, Tassel-Thedalund-Terry
percent is irrigated and is well suited to all commonly
grown crops. In nonirrigated areas, winter wheat is the Shallow to moderately deep, gently sloping to strongly
principal crop. The potential is fair for urban develop- sloping, well drained sandy looms to clay looms formed
ment. Moderately slow permeability is the main limita- in residuum from sandstone and shale
tion. The potential is also fair for development of open- This gently sloping to strongly sloping map unit is in
land wildlife. the western part of the survey area, adjacent to and in-
cluding the sandstone breaks along some of the major
5. Olney-Kim-Otero streams. It makes up about 1 percent of the total acreage.
Deep, nearly level to moderately sloping, well drained About 50 percent is Tassel soils, 20 percent is Thedalund
sandy loams and loams formed in mixed alluvium and soils, 20 percent is Terry soils, and 10 percent is soils of
eolian deposits minor extent.
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