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SHEET NO. 29
WELD COUNTY.COLORADO, SOUTHERN PART
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32 SOIL SURVEY
are Rocky Mountain juniper, eastern redcedar, ponderosa ble years to 1,800 pounds in unfavorable years. As range
pine, Siberian elm, Russian-olive, and hackberry. The condition deteriorates, the sand bluestem, sand reedgrass,
shrubs best suited are skunkbush sumac, lilac, and Siberi- and switchgrass decrease and blue grama, sand dropseed,
an peashrub. and sand sage increase. Annual weeds and grasses invade
Wildlife is an important secondary use of this soil. The the site as range condition becomes poorer.
cropland areas provide favorable habitat for ring-necked Management of vegetation on this soil should be based
pheasant and mourning dove. Many nongame species can on taking half and leaving half of the total annual produc-
be attracted by establishing areas for nesting and escape tion. Seeding is desirable if the range is in poor condition.
cover. For pheasants, undisturbed nesting cover is essen- Sand bluestem, sand reedgrass, switchgrass, sideoats
tial and should be included in plans for habitat develop- grama, blue grama, and pubescent wheatgrass are suita-
ment, especially in areas of intensive agriculture. ble for seeding. The grass selected should meet the
Rapid expansion of Greeley and the surrounding area seasonal requirements of livestock. It can be seeded into
has resulted in urbanization of much of this Olney soil. a clean, firm sorghum stubble, or it can be drilled into a
This soil has good potential for urban and recreational firm prepared seedbed. Seeding early in spring has
development. The only limiting feature is the moderately proven most successful.
rapid permeability in the substratum, which causes a Windbreaks and environmental plantings are generally
hazard of ground water contamination from sewage suited to this soil. Soil blowing, the principal hazard in
lagoons. Lawns, shrubs, and trees grow well. Capability establishing trees and shrubs, can be controlled by cul-
class I irrigated. tivating only in the tree row and by leaving a strip of
X447—Olney fine sandy loam, 1 to 3 percent slopes. vegetation between the rows. Supplemental irrigation
This is a deep, well drained soil on plains at elevations of may be needed at the time of planting and during dry
4,600 to 5,200 feet. It formed in mixed outwash deposits. periods. Trees that are best suited and have good survival
Included in mapping are small areas of soils that have a are Rocky Mountain juniper, eastern redcedar, ponderosa
dark surface layer. Some small leveled areas are also in- pine, Siberian elm, Russian-olive, and hackberry. The
eluded. shrubs best suited are skunkbush sumac, lilac, and Siberi-
Typically the surface layer of this Olney soil is grayish an peashrub.
brown fine sandy loam about 10 inches thick. The subsoil Wildlife is an important secondary use of this soil. The
is yellowish brown and very pale brown sandy clay loam cropland areas provide favorable habitat for ring-necked
about 14 inches thick. The substratum to a depth of 60 pheasant and mourning dove. Many nongame species can
_
inches is very pale brown, calcareous fine sandy loam. be attracted by establishing areas for nesting and escape
Permeability and available water capacity are cover. For pheasants, undisturbed nesting cover is essen-
moderate. The effective rooting depth is 60 inches or tial and should be included in plans for habitat develop-
more. Surface runoff is medium, and the erosion hazard is ment, especially in areas of intensive agriculture. Range-
low, land wildlife, for example, the pronghorn antelope, can be
In irrigated areas this soil is suited to all crops com- attracted by developing livestock watering facilities,
monly grown in the area, including corn, sugar beets, managing livestock grazing, and reseeding where needed.
beans, alfalfa, small grain, potatoes, and onions. An exam- Rapid expansion of Greeley and the surrounding area
ple of a suitable cropping system is 3 to 4 years of alfalfa has resulted in urbanization of much of the Olney soil.
followed by corn, corn for silage, sugar beets, small grain, This soil has good potential for urban and recreational
or beans. Land leveling, ditch lining, and installing development. The only limiting feature is the moderately
pipelines may be needed for proper water application. All rapid permeability in the substratum, which causes a
methods of irrigation are suitable, but furrow irrigation is hazard of ground water contamination from sewage
the most common. Barnyard manure and commercial fer- lagoons. Lawns, shrubs, and trees grow well. Capability
tilizer are needed for top yields. subclass Ile irrigated, IVe nonirrigated; Sandy Plains
In nonirrigated areas this soil is suited to winter wheat, range site.
barley, and sorghum. Most of the acreage is planted to 48—Olney fine sandy loam, 3 to 5 percent slopes.
winter wheat. The predicted average yield is 28 bushels This is a deep, well drained soil on plains at elevations of
per acre. The soil is summer fallowed in alternate years 4,600 to 5,200 feet. It formed in mixed outwash deposits.
to allow moisture accumulation. Generally precipitation is Included in mapping are small areas of soils that have a
too low for beneficial use of fertilizer. dark surface layer and small areas of soils that have
Stubble mulch farming, striperopping, and minimum til- sandstone and shale within a depth of 60 inches.
lage are needed to control soil blowing and water erosion. Typically the surface layer of this Olney soil is grayish
Terracing also may be needed to control water erosion. brown fine sandy clay loam about 8 inches thick. The sub-
The potential native vegetation on this range site is soil is yellowish brown and very pale brown fine sandy
dominated by sand bluestem, sand reedgrass, and blue loam about 12 inches thick. The substratum to a depth of
grama. Needleandthread, switchgrass, sideoats grama, 60 inches is very pale brown, calcareous fine sandy loam.
and western wheatgrass are also prominent. Potential Permeability and available water capacity are
production ranges from 2,200 pounds per acre in favora- moderate. The effective rooting depth is 60 inches or
34 SOIL SURVEY
or drilled into a firm, clean sorghum stubble. Seeding tivating only in the tree row and by leaving a strip of
early in spring has proven most successful. Brush vegetation between the rows. Supplemental irrigation
management can also help to improve deteriorated range. may be needed at the time of planting and during dry qq
Windbreaks and environmental plantings are fairly well periods. Trees that are best suited and have good survival
suited to this soil. Blowing sand and low available water are Rocky Mountain juniper, eastern redcedar, ponderosa
capacity are the principal hazards in establishing trees pine, Siberian elm, Russian-olive, and hackberry. The
and shrubs. This soil is so loose that trees should be shrubs best suited are skunkbush sumac, lilac, and Siberi-
planted in shallow furrows, and vegetation is needed an peashrub.
between the rows. Supplemental irrigation may be needed Wildlife is an important secondary use of this soil.
to insure survival. Trees that are best suited and have Ring-necked pheasant, mourning dove, and many non-
good survival are Rocky Mountain juniper, eastern game species can be attracted by establishing areas for
redcedar, ponderosa pine, and Siberian elm. The shrubs nesting and escape cover. For pheasants, undisturbed
best suited are skunkbush sumac, lilac, and Siberian nesting cover is essential and should be included in plans
peashrub. for habitat development, especially in areas of intensive
Wildlife is an important secondary use of this soil. The agriculture.
cropland areas provide favorable habitat for ring-necked Rapid expansion of Greeley and the surrounding area
pheasant and mourning dove. Many nongame species can has resulted in urbanization of much of this Otero soil.
be attracted by establishing areas for nesting and escape This soil has excellent potential for urban and recrea-
cover. For pheasants, undisturbed nesting cover is essen- tional development. The only limiting feature is the
tial and should be included in plans for habitat develop- moderately rapid permeability in the substratum, which
ment, especially in areas of intensive agriculture. Range- causes a hazard of ground water contamination from
land wildlife, for example, the pronghorn antelope, can be sewage lagoons. Lawns, shrubs, and trees grow well.
attracted by developing livestock watering facilities, Capability subclass Its irrigated.
managing livestock grazing, and reseeding where needed. X51—Otero sandy loam, 1 to 3 percent slopes. This is a
Few areas of this soil are in major growth and ur- deep, well drained soil on plains at elevations of 4,700 to
banized centers. The chief limiting feature is the rapid 5,250 feet. It formed in mixed outwash and eolian
permeability in the substratum, which causes a hazard of deposits. Included in mapping are small areas of soils that
ground water contamination from seepage. Potential for have loam and clay loam underlying material.
recreation is poor because of the sandy surface layer. Typically the surface layer is brown sandy loam about
- Capability subclass IVe irrigated, VIe nonirrigated; Deep 12 inches thick. The underlying material to a depth of 60
Sand range site. inches is pale brown calcareous fine sandy loam.
50—Otero sandy loam, 0 to 1 percent slopes. This is a Permeability is rapid. Available water capacity is
deep, well drained soil on smooth plains at elevations of moderate. The effective rooting depth is 60 inches or
4,700 to 5,250 feet. It formed in mixed outwash and eolian more. Surface runoff is slow, and the erosion hazard is
deposits. Included in mapping are small areas of soils that low.
have loam and clay loam underlying material. This soil is used almost entirely for irrigated crops. It
Typically the surface layer is brown sandy loam about is suited to all crops commonly grown in the area. Land
12 inches thick. The underlying material to a depth of 60 leveling, ditch lining, and installing pipelines may be
inches is pale brown calcareous fine sandy loam. needed for proper water application.
Permeability is rapid. Available water capacity is All methods of irrigation are suitable, but furrow ir-
moderate. The effective rooting depth is 60 inches or rigation is the most common. Barnyard manure and corn-
more. Surface runoff is slow, and the erosion hazard is mercial fertilizer are needed for top yields.
low. In nonirrigated areas this soil is suited to winter wheat,
This soil is used almost entirely for irrigated crops. It barley, and sorghum. Most of the acreage is planted to
is suited to all crops commonly grown in the area, includ- winter wheat. The predicted average yield is 28 bushels
ing corn, sugar beets, beans, alfalfa, small rain, potatoes, per acre. The soil is summer fallowed in alternate years
and onions. An example of a suitable cropping system is 3 to allow moisture accumulation. Generally precipitaiton is
to 4 years of alfalfa followed by corn, corn for silage, too low for beneficial use of fertilizer.
sugar beets, small grain, or beans. Generally, such charac- Stubble mulch farming, striperopping, and minimum til-
teristics as a high clay content or a rapidly permeable lage are needed to control water erosion. Terracing also
substratum slightly restrict some crops. may be needed to control water erosion.
All methods of irrigation are suitable, but furrow ir- The potential native vegetation on this range site is
rigation is the most common. Proper irrigation water dominated by sand bluestem, sand reedgrass, and blue
management is essential. Barnyard manure and commer- grama. Needleandthread, switchgrass, sideoats grama,
cial fertilizer are needed for top yields. and western wheatgrass are also prominent. Potential
Windbreaks and environmental plantings are generally production ranges from 2,200 pounds per acre in favora-
suited to this soil. Soil blowing, the principal hazard in ble years to 1,800 pounds in unfavorable years. As range
-- establishing trees and shrubs, can be controlled by cul- condition deteriorates, the sand bluestem, sand reedgrass,
WELD COUNTY, COLORADO, SOUTHERN PART 35
and switchgrass decrease and blue grama, sand dropseed, should be grown at least 50 percent of the time. Contour
and sand sage increase. Annual weeds and grasses invade ditches and corrugations can be used in irrigating close
the site as range condition becomes poorer. grown crops and pasture. Furrows, contour furrows, and
Management of vegetation on this soil should be based cross slope furrows are suitable for row crops. Sprinkler
on taking half and leaving half of the total annual produc- irrigation is also desirable. Keeping tillage to a minimum
tion. Seeding is desirable if the range is in poor condition. and utilizing crop residue help to control erosion. Main-
Sand bluestem, sand reedgrass, switchgrass, sideoats taming fertility is important. Crops respond to applica-
grama, blue grama, pubescent wheatgrass, and crested tions of phosphorus and nitrogen.
wheatgrass are suitable for seeding. The grass selected The potential native vegetation on this site is
should meet the seasonal requirements of livestock. It can dominated by sand bluestem, sand reedgrass, and blue
be seeded into a clean, firm stubble, or it can be drilled grama. Needleandthread, switchgrass, sideoats grama,
into a firm prepared seedbed. Seeding early in spring has and western wheatgrass are also prominent. Potential
proven most successful. production ranges from 2,200 pounds per acre in favora-
Windbreaks and environmental plantings are generally ble years to 1,800 pounds in unfavorable years. As range
suited to this soil. Soil blowing, the principal hazard in condition deteriorates, the sand bluestem, sand reedgrass,
establishing trees and shrubs, can be controlled by cul- and switchgrass decrease, and blue grama, sand dropseed,
tivating only in the tree row and by leaving a strip of and sand sage increase. Annual weeds and grasses invade
vegetation between the rows. Supplemental irrigation the site as range condition becomes poorer.
may be needed at the time of planting and during dry Management of vegetation on this soil should be based
periods. Trees that are best suited and have good survival on taking half and leaving half of the total annual produc-
are Rocky Mountain juniper, eastern redcedar, ponderosa tion. Seeding is desirable if the range is in poor condition.
pine, Siberian elm, Russian-olive, and hackberry. The Sand bluestem, sand reedgrass, switchgrass, sideoats
shrubs best suited are skunkbush sumac, lilac, and Siberi- grama, blue grama, pubescent wheatgrass, and crested
an peashrub. wheatgrass are suitable for seeding. The grass selected
Wildlife is an important secondary use of this soil. should meet the seasonal requirements of livestock. It can
Ring-necked pheasant, mourning dove, and many non- be seeded into a clean, firm sorghum stubble, or it can be
game species can be attracted by establishing areas for drilled into a firm prepared seedbed. Seeding early in
nesting and escape cover. For pheasants, undisturbed spring has proven most successful.
- nesting cover is essential and should be included in plans Windbreaks and environmental plantings are generally
for habitat development, especially in areas of intensive suited to this soil. Soil blowing, the principal hazard in
agriculture. establishing trees and shrubs, can be controlled by cul-
Rapid expansion of Greeley and the surrounding area tivating only in the tree row and by leaving a strip of
has resulted in urbanization of much of this Otero soil. vegetation between the rows. Supplemental irrigation
This soil has excellent potential for urban and recrea- may be needed at the time of planting and during dry
tional development. The only limiting feature is the periods. Trees that are best suited and have good survival
moderately rapid permeability in the substratum, which are Rocky Mountain juniper, eastern redcedar, ponderosa
causes a hazard of ground water contamination from pine, Siberian elm, Russian-olive, and hackberry. The
sewage lagoons. Lawns, shrubs, and trees grow well. shrubs best suited are skunkbush sumac, lilac, and Siberi-
Capability subclass IIIe irrigated, IVe nonirrigated; an peashrub.
Sandy Plains range site. Wildlife is an important secondary use of this soil.
52—Otero sandy loam, 3 to 5 percent slopes. This is a Ring-necked pheasant, mourning dove, and many non-
deep, well drained soil on plains at elevations of 4,700 to game species can be attracted by establishing areas for
5,250 feet. It formed in mixed outwash and eolian nesting and escape cover. For pheasants, undisturbed
deposits. Included in mapping are small areas of soils that nesting cover is essential and should be included in plans
have loam and clay loam underlying material. Also in- for habitat development, especially in areas of intensive
eluded are small areas of soils that have sandstone and agriculture.
shale within a depth of 60 inches. Rapid expansion of Greeley and the surrounding area
Typically the surface layer of this Otero soil is brown has resulted in urbanization of much of this Otero soil.
sandy loam about 10 inches thick. The underlying material The soil has excellent potential for urban and recreational
to a depth of 60 inches is pale brown calcareous fine development. The only limiting feature is the moderately
sandy loam. rapid permeability in the substratum, which causes a
Permeability is rapid. Available water capacity is hazard of ground water contamination from sewage
moderate. The effective rooting depth is 60 inches or lagoons. Lawns, shrubs, and trees grow well. Capability
more. Surface runoff is medium, and the erosion hazard is subclass tile irrigated, VIe nonirrigated; Sandy Plains
low. range site.
This soil is used almost entirely for irrigated crops. It 53—Otero sandy loam, 5 to 9 percent slopes. This is a
-- is suited to the crops commonly grown in the area. deep, well drained soil on plains at elevations of 4,700 to
Perennial grasses and alfalfa or close growing crops 5,250 feet. It formed in mixed outwash and eolian
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