HomeMy WebLinkAbout992651.tiff 8 SOIL SURVEY
filter the leachate. Sewage lagoons require sealing. 60 percent of the unit. Aquents, which have a lighter
Lawns, shrubs, and trees grow well. Capability subclass colored surface layer, make up about 35 percent. About 5
IIs irrigated. percent is Aquepts and Bankard sandy loam.
2—Altvan loam, 1 to 3 percent slopes. This is a deep, These are deep, poorly drained soils that formed in
well drained soil on terraces at elevations of 4,500 to 4,900 recent alluvium. No one pedon is typical. Commonly the
feet. It formed in old alluvium deposited by the major soils have a mottled, mildly alkaline to moderately al-
rivers. Included in mapping are small areas of soils that kaline loamy or clayey surface layer and underlying
show evidence of poor drainage. Also included are small, material and are underlain by sand or sand and gravel
long and narrow areas of sand and gravel deposits. within 48 inches. In places they have a gleyed layer in the
Typically the surface layer of this Altvan soil is grayish underlying material.
brown loam about 10 inches thick. The subsoil is brown Most of the acreage is subject to flooding. The water
and light yellowish brown clay loam and sandy clay loam table is at or near the surface early in spring and recedes
about 14 inches thick. The substratum is calcareous loamy to as deep as 48 inches late in fall in some years.
sand about 5 inches thick over gravelly sand. These soils are used for rangeland and wildlife habitat.
Permeability and available water capacity are Some small areas have been reclaimed by major drainage
moderate. The effective rooting depth is 20 to 40 inches. and leveling and are used for irrigated drops.
Surface runoff is medium, and the erosion hazard is low. The potential native vegetation is dominated by alkali
This soil is used almost entirely for irrigated crops. It sacaton, switchgrass, and western wheatgrass. Saltgrass,
is suited to all crops commonly grown in the area, includ- sedge, rush, and alkali bluegrass are also prominent.
ing corn, sugar beets, beans, alfalfa, small grain, potatoes, Potential production ranges from 3,000 pounds per acre in
and onions. An example of a suitable cropping system is 3 favorable years to 2,000 pounds in unfavorable years. As
to 4 years of alfalfa followed by corn, corn for silage, range condition deteriorates, the switchgrass, alkali
sugar beets, small grain, or beans. Land leveling, ditch sacaton, and western wheatgrass decrease and saltgrass,
lining, and installing pipelines may be needed for proper sedge, and rush increase.
water application. Management of vegetation should be based on taking
All methods of irrigation are suitable, but furrow ir- half and leaving half of the total annual production. Seed-
rigation is the most common. Barnyard manure and com- ing is difficult and costly because numerous tillage prac-
mercial fertilizer are needed for top yields. tices are required to eliminate the saltgrass sod.
Windbreaks and environmental plantins of trees and Switchgrass, western wheatgrass, alkali sacaton, tall
shrubs commonly grown in the area are are generally well wheatgrass, and tall fescue are suitable for seeding. They
suited to this soil. Cultivation to control competing
vegetation should be continued for as many years as can be seeded into a clean, firm seedbed. Seedbed
possible following planting. Trees that are best suited and preparation usually requires more than 1 year to
have good survival are Rocky Mountain juniper, eastern eliminate the saltgrass sod. A grass drill should be used.
redcedar, ponderosa pine, Siberian elm, Russian-olive, and Seeding early in spring has proven most successful.
Wetland wildlife, especially waterfowl, utilize this unit.
hackberry. The shrubs best suited are skunkbush sumac,
lilac, Siberian peashrub, and American plum. The wetland plants provide nesting and protective cover,
This soil can produce habitat elements that are highly as well as some food. The nearby irrigated cropland,
suitable for openland wildlife including pheasant, cotton- where wildlife obtain much of their food and fmd protec-
tail, and mourning dove. Such crops as wheat, corn, and tive cover, makes this unit valuable to both wetland and
alfalfa provide suitable habitat for openland wildlife, openland wildlife.
especially pheasant. Tree and shrub plantings and Openland wildlife, especially pheasant, use this unit for
undisturbed nesting cover would enhance openland wil- cover and nesting. Deer fmd excellent cover in some
dlife populations. areas.
This Altvan soil has fair to good potential for urban These valuable wildlife areas should be protected from
and recreational development. The chief limiting soil fea- fire and fenced to prevent encroachment and overuse by
tures for urban development are the shrink-swell poten- livestock. They should not be drained.
tial of the subsoil as it wets and dries and the rapid These soils have good potential as a source of sand and
permeability of the sand and gravel substratum. Septic gravel. Capability subclass VIw; Salt Meadow range site.
tank absorption fields function properly, but in places the 4—Aquolls and Aquepts, flooded. This nearly level
substratum does not contain enough fines to properly map unit is in depressions in smooth plains and along the
filter the leachate. Sewage lagoons require sealing. bottoms of natural drainageways throughout the survey
Lawns, shrubs, and trees grow well. Capability subclass area. Aquolls, which have a dark colored surface layer,
Ile irrigated. make up about 55 percent of the unit. Aquepts, which
3—Aquolls and Aquents, gravelly substratum. This have a lighter colored surface layer, make up about 25
nearly level map unit is on bottom lands and flood plains percent. About 20 percent is soils that are well drained
of all the major streams in the survey area. Aquolls, and soils that have sandstone or shale within 48 inches of
which have a dark colored surface layer, make up about the surface.
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992651 3
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WELD COUNTY, COLORADO, SOUTHERN PART 9
IThese are deep, poorly drained soils that formed in If summer fallowed in alternate years, this soil is well
cent alluvium. No one pedon is typical. Commonly the suited to winter wheat, barley, and sorghum. Winter
d soils have a mottled, mildly to moderately alkaline loamy wheat is the principal crop. The predicted average yield is
or clayey surface layer and underlying material that ex- 33 bushels per acre. If the crop is winterkilled, spring
tends to a depth of 60 inches or more. In places they have wheat can be seeded. Generally precipitation is too low
• a gleyed layer in the underlying materiaL for beneficial use of fertilizer.
i Most of the acreage is subject to excessive runoff. The Stubble mulch farming, striperopping, and minimum til-
water table is at or near the surface in spring and during lage are needed to control soil blowing and water erosion.
the peak of the irrigation season. Terracing also may be needed to control water erosion.
• These soils are used for rangeland and wildlife habitat. The potential native vegetation on this range site is
Some small areas are irrigated pasture. dominated by sand bluestem, sand reedgrass, and blue
The potential native vegetation is dominated by grama. Needleandthread, switchgrass, sideoats grama,
• switchgrass, prairie cordgrass, saltgrass, alkali sacaton, and western wheatgrass are also prominent. Potential
1 big bluestem, indiangrass, western wheatgrass, slender production ranges from 2,200 pounds per acre in favora-
wheatgrass, sedge, and rush. Cattails and bullrush grow ble years to 1,800 pounds in unfavorable years. As range
in the swampy spots associated with these range sites. condition deteriorates, the sand bluestem, sand reedgrass,
pounds per acre in and switchgrass decrease and blue grama, sand dropseed,
Potential production ranges from 4,000
favorable years to 3,000 pounds in unfavorable years. As and sand sage increase. Annual weeds and grasses invade
the site as range condition becomes poorer.
range condition deteriorates, the tall and mid grasses
Management of vegetation should be based on taking
decrease, production drops, and saltgrass, sedge, and rush half and leaving half of the total annual production. Seed-
: increase. The fanning and irrigation in in adjacent areas has ing is desirable if the range is in poor condition. Sand
e increased the amount of salts on much of the acreage. bluestem, sand reedgrass, switchgrass, sideoats grama,
{ Management of vegetation on this soil should be based blue grama, pubescent wheatgrass, and crested Wheat-
on taking half and leaving half of the total annual produc-
grass are suitable for seeding. The grass selected should
tion. Switchgrass, big bluestem, indiangrass, westernester meet the seasonal requirements of livestock. It can be
wheatgrass, pubescent wheatgrass, intermediate wheat- seeded into a clean, firm sorghum stubble, or it can be
grass, tall wheatgrass, and tall fescue are suitable for drilled into a firm prepared seedbed. Seeding early in
^geeding. The plants selected should met the seasonal spring has proven most successful.
quirements of livestock. For successful seeding, a firm Windbreaks and environmental plantings are generally
prepared seedbed is needed. A grass drill should be used. suited to this soil. Soil blowing, the principal hazard in
Seeding early in spring has proven most successful. Til-
t establishing trees and shrubs, can be controlled by cul-
lage is needed to eliminate the undesirable vegetation. tivating only in the tree row and by leaving a strip of
t Wetland wildlife, especially waterfowl, utilize this unit. vegetation between the rows. Supplemental irrigation
t, The wetland plants provide nesting and protective cover may be needed at the time of planting and during dry
1 as well as some food. The nearby irrigated cropland, periods. Trees that are best suited and have good survival
where wildlife obtain much of their food and find protec- are Rocky Mountain juniper, eastern redcedar, ponderosa
five cover, makes this unit valuable to both wetland and pine, Siberian elm, Russian-olive, and hackberry. The
openland wildlife. shrubs best suited are skunkbush sumac, lilac, and Siberi-
Openland wildlife, especially pheasant, use this unit for an peashrub.
cover and nesting. Deer find excellent cover in some Wildlife is an important secondary use of this soil. The
areas. These valuable wildlife areas should be protected cropland areas provide favorable habitat for ring-necked
from fire and fenced to prevent encroachment and pheasant and mourning dove. Many nongame species can
overuse by livestock. They should not be drained. Capa- be attracted by establishing areas for nesting and escape
• bility subclass VIw; Aquolls in Salt Meadow range site, cover. For pheasants, undisturbed nesting cover is essen-
Aquepts in Wet Meadow range site. tial and should be included in plans for habitat develop-
` 5—Ascalon sandy loam, 1 to 3 percent slopes. This is ment. Rangeland wildlife, for example, the pronghorn an-
a deep, well drained soil on uplands at elevations of 4,600 telope, can be attracted by developing livestock watering
F to 5,200 feet. It formed in alluvium. Included in mapping facilities, managing livestock grazing, and reseeding
,t are small areas of rock outcrop. where needed.
x: Typically the surface layer is brown sandy loam about Few areas of this Ascalon soil are in major growth and
• 10 inches thick. The subsoil is pale brown and yellowish urbanized centers. The shrink-swell potential of the sub-
• brown sandy clay loam about 15 inches thick. The sub- soil as it wets and dries is the most limiting soil feature
, stratum to a depth of 60 inches is calcareous fine sandy that must be considered in planning homesites and con-
1 loam, structing roads. Capability subclass IIIe nonirrigated;
Permeability is moderate. Available water capacity is Sandy Plains range site.
R `gh. The effective rooting depth is 60 inches or more. 6—Ascalon sandy loam, 3 to 5 percent slopes. This is
• arface runoff is slow, and the erosion hazard is low. a deep, well drained soil on uplands at elevations of 4,600
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44 SOIL SURVEY
to allow moisture accumulation. Generally precipitation is Permeability is rapid. Available water capacity is low.
too low to make beneficial use of fertilizer. The effective rooting depth is 60 inches or more. Surface
Stubble mulch farming, striperopping, and minimum til- runoff is medium, and the erosion hazard is moderate.
lage are needed to control soil blowing and water erosion. The potential native vegetation is dominated by little
Terracing also may be needed to control water erosion. bluestem, sideoats grama, sand reedgrass, blue grama,
The potential native vegetation is dominated by hairy grama, switchgrass, and needleandthread. Potential
western wheatgrass and blue grama. Buffalograss is also production ranges from 700 pounds per acre in favorable
present. Potential production ranges from 1,000 pounds years to 200 pounds in unfavorable years. As range condi-
per acre in favorable years to 600 pounds in unfavorable tion deteriorates, the tall and mid grasses decrease, blue
years. As range condition deteriorates, a blue grama-buf- grama and hairy grama increase, and forage production
falograss sod forms. Undesirable weeds and annuals in- drops. r
vade the site as range condition becomes poorer. Management of vegetation should be based on taking
Management of vegetation on this soil should be based half or less of the total annual production. Deferred graz-
on taking half and leaving half of the total annual produc- ing is practical in improving range condition. Seeding and
tion. Range pitting can reduce runoff. Seeding is desirable mechanical treatment are impractical.
if the range is in poor condition. Western wheatgrass, Windbreaks and environmental plantings generally are
blue grama, sideoats grama, buffalograss, pubescent not suited to these soils. Onsite investigation is needed to
determine if plantings are feasible.
wheatgrass, and crested wheatgrass are suitable for seed-
ing. The grass selected should meet the seasonal require- Wildlife populations are limited because the necessary
ments of livestock. It can be seeded into a clean, firm habitat elements are lacking. Because most of the acreage
sorghum stubble, or it can be drilled into a
is rangeland, only rangeland wildlife, for example scaled
firm prepared quail and antelope, are typical. Extreme care is needed in
seedbed. Seeding early in spring has proven most success- managing livestock grazing in order to provide suitable
f�• habitat on these soils.
Windbreaks and environmental plantings of trees and Potential is poor for urban and recreational develop-
shrubs commonly grown in the area are generally well ment. The chief limiting soil features are the loose, coarse
suited to this soil. Cultivation to control competing textured soil, steep slopes, and rapid permeability. Capa-
vegetation should be continued for as many years as bility subclass VIIs irrigated, VIIs nonirrigated; Gravel
possible following planting. Trees that are best suited and Breaks range site.
have good survival are Rocky Mountain juniper, eastern 69—Valent sand, 0 to 3 percent slopes. This is a deep,
redeedar, ponderosa pine, Siberian elm, Russian-olive, and excessively drained soil on plains at elevations of 4,650 to
hackberry. The shrubs best suited are skunkbush sumac, 5,100 feet. It formed in eolian deposits. Included in
lilac, Siberian peashrub, and American plum. mapping are small areas of soils that have lime within a
Wildlife is an important secondary use of this soil. The depth of 40 inches.
cropland areas provide favorable habitat for ring-necked Typically the surface layer is brown sand about 8
pheasant and mourning dove. Many nongame species can inches thick. The underlying material to a depth of 60
be attracted by establishing areas for nesting and escape inches is brown sand.
cover. For pheasants, undisturbed nesting cover is essen- Permeability is rapid. Available water capacity is
tial and should be included in plans for habitat develop- moderate. The effective rooting depth is 60 inches or
ment, especially in areas of intensive agriculture. Range- more. Surface runoff is slow, and the erosion hazard is
land wildlife, for example, the pronghorn antelope, can be low.
attracted by developing livestock watering facilities, This soil is suited to limited cropping. Intensive
managing livestock grazing, and reseeding where needed. cropping is hazardous because of erosion. The cropping
This soil has poor potential for urban and recreational system should be limited to such close grown crops as al-
development. Slow permeability and high shrink swell falfa, wheat, and barley. The soil also is suited to ir-
cause problems in dwelling and road construction. Capa- rigated pasture. A suitable cropping system is 3 to 4
bility subclass IIIe irrigated, IVe nonirrigated; Clayey years of alfalfa followed by 2 years of corn and small
Plains range site. grain and alfalfa seeded with a nurse crop.
68—Ustic Torriorthents, moderately steep. These are Closely spaced contour ditches or sprinkers can be used
deep, excessively drained soils on terrace breaks and in irrigating close grown crops. Contour furrows or sprin-
escarpments at elevations of 4,450 to 5,100 feet. They klers should be used for new crops. Applications of bar-
formed in gravelly alluvium and have slopes of 9 to 25 nyard manure and commercial fertilizer help to maintain
percent. Included in mapping are small areas of soils that good production.
have pockets of sandy loam and loam in the underlying The potential vegetation is dominated by sand
material. bluestem, sand reedgrass, switchgrass, sideoats grama,
Typically the surface layer is pale brown gravelly sand needleandthread, little bluestem, and blue grama. Poten-
about 10 inches thick. The underlying material to a depth tial production ranges from 2,500 pounds per acre in
of 60 inches is pale brown gravelly sand. favorable years to 1,800 pounds in unfavorable years. As
f
WELD COUNTY, COLORADO, SOUTHERN PART 45
range condition deteriorates, the sand bluestem, The potential vegetation is dominated by sand
-itchgrass, sand reedgrass, sideoats grama, and little bluestem, sand reedgrass, switchgrass, sideoats grama,
.aestem decrease, forage production drops, and sand needleandthread, little bluestem, and blue grama. Poten-
sage increases. Undesirable weeds and annuals invade tial production ranges from 2,500 pounds per acre in
and "blowout" conditions can occur as range condition favorable years to 1,800 pounds in unfavorable years. As
becomes poorer. range condition deteriorates, the sand bluestem,
Management of vegetation on this soil should be based switchgrass, sand reedgrass, sideoats grama, and little
on taking half and leaving half of the total annual produc- bluestem decrease, forage production drops, and sand
don. Seeding is desirable if the range is in poor condition. sage increases. Undesirable weeds and annuals invade
Sand bluestem, sand reedgrass, indiangrass, switchgrass, and "blowout" conditions can occur as range condition
sideoats grama, little bluestem, and blue grama are suita- becomes poorer.
ble for seeding. Because this soil is susceptible to soil Management of vegetation on this soil should be based
blowing, it should be seeded using an interseeder, or the on taking half and leaving half of the total annual produc-
seed should be drilled into a firm, clean sorghum stubble. tion. Seeding is desirable if the range is in poor condition.
Seeding early in spring has proven most successful. Brush Sand bluestem, sand reedgrass, indiangrass, ,switchgrass,
management also can help in improving deteriorated side-oats grama, little bluestem, and blue grama are suita-
range. ble for seeding. Because this soil is susceptible to soil
Windbreaks and environmental plantings are fairly well blowing, it should be seeded using an interseeder or the
suited to this soil. Blowing sand and the moderate availa- seed should be drilled into a firm, clean sorghum stubble.
ble water capacity are the principal hazards in establish- Seeding early in spring has proven most successful. Brush
ing trees and shrubs. The soil is so loose that trees should management can also help in improving deteriorated
be planted in shallow furrows, maintaining vegetation range.
between the rows. Supplemental irrigation is needed to Windbreaks and environmental plantings are generally
insure survival. Trees that are best suited and have good not suited to this soil. Onsite investigation is needed to
survival are Rocky Mountain juniper, eastern redcedar, determine if plantings are feasible.
ponderosa pine, and Siberian elm. The shrubs best suited Wildlife is an important secondary use of this soil. Ran-
are skunkbush sumac, lilac, and Siberian peashrub. geland wildlife, for example, the pronghorn antelope, can
Wildlife is an important secondary use of this soil. The be attracted by developing livestock watering facilities,
_cropland areas provide favorable habitat for ring-necked managing livestock grazing, and reseeding where needed.
?asant and mourning dove. Many nongame species can This soil has fair potential for urban development. The
..� attracted by establishing areas for nesting and escape chief limiting soil features are the rapid permeability and
cover. For pheasants, undisturbed nesting cover is essen- the susceptibility to soil blowing. Septic tank absorption
tial and should be included in plans for habitat develop- fields function properly, but in places the sandy sub-
ment, especially in areas of intensive agriculture. Range- stratum does not properly filter the leachate. Sewage
land wildlife, for example, the pronghorn antelope, can be lagoons must be sealed. Once established, lawns, shrubs,
attracted by developing livestock watering facilities, and trees grow well. Capability subclass VIe irrigated,
managing livestock grazing, and reseeding where needed. VIe nonirrigated; Deep Sand range site.
This soil has fair potential for urban development. The 71—Valent-Loup complex, 0 to 9 percent slopes. This
primary limiting soil features are the rapid permeability level to moderately sloping map unit occupies hills, ridges,
and the susceptibility to soil blowing. Septic tank absorp- and depression or pothole-like areas in the sandhills at
tion fields function properly, but in places the sandy sub- elevations of 4,670 to 4,700 feet. The Valent soil makes up
stratum does not properly filter the leachate. Sewage about 60 percent of the unit, the Loup soil about 35 per-
lagoons must be sealed. Once established, the lawns, cent. About 5 percent is dune sand. The Valent soil occu-
shrubs, and trees grow well. Capability subclass IVe ir- pies the hills and ridges and the Loup soil the depressions
rigated, VIe nonirrigated; Deep Sand range site. or potholes.
70—Valent sand, 3 to 9 percent slopes. This is a deep, The Valent soil is deep and excessively drained. It
excessively drained soil on plains at elevations of 4,650 to formed in eolian deposits. Typically the surface layer is
5,100 feet. It formed in eolian deposits. Included in brown sand about 8 inches thick. The underlying material
mapping are small areas of soils that have lime within a to a depth of 60 inches is brown sand.
depth of 40 inches. Also included are small areas of soils Permeability is rapid. Available water capacity is
that have sandstone between 40 and 60 inches. moderate. The effective rooting depth is 60 inches or
Typically the surface layer of the Valent soil is brown more. Surface runoff is slow, and the erosion hazard is
sand about 6 inches thick. The underlying material to a low.
depth of 60 inches is brown sand. The Loup soil is deep and poorly drained. It formed in
Permeability is rapid. Available water capacity is sandy alluvium. Typically the surface layer is very dark
moderate. The effective rooting depth is 60 inches or grayish brown, mottled loamy sand about 16 inches thick.
pore. Surface runoff is slow, and the erosion hazard is The underlying material to a depth of 60 inches is light
brownish gray, mottled loamy sand and sandy loam.
46 SOIL SURVEY
Permeability is rapid. Available water capacity is yellowish brown fine sandy loam about 16 inches thick
moderate. A water table is at or near the surface in The substratum to a depth of 60 inches is sandy loam.
spring and about 36 inches below the surface in fall. Sur- Permeability is moderately rapid. Available wate
face runoff is slow, and the erosion hazard is low. capacity is moderate. The effective rooting depth is 6
This unit is used for rangeland and wildlife habitat. The inches or more. Surface runoff is slow, and the erosio:
potential native vegetation on the Valent soil is hazard is low.
dominated by sand reedgrass, sand bluestem, blue and In irrigated areas this soil is suited to the crops corn
hairy grama, little bluestem, needleandthread, and monly grown in the area. Perennial grasses and alfalfa o
sideoats grama. Potential production ranges from 1,800 close grown crops should be grown at least 50 percent o-
pounds per acre in favorable years to 1,400 pounds in un- the time. Contour ditches and corrugations can be used i,
favorable years. As range condition deteriorates, the sand irrigating close grown crops and pasture. Furrows, cor
bluestem, sand reedgrass, sideoats grama, and little tour furrows, and cross slope furrows are suitable for no,
bluestem decrease; sandhill muhly and blowout grass in- crops. Sprinkler irrigation is also desirable. Keeping ti
crease, and forage production drops. "Blowouts" occur as lage to a minimum and utilizing crop residue help to cot.
range condition becomes poorer. trol erosion. Maintaining fertility is important. Crop
The native vegetation on the Loup soil is dominated by respond to applications of phosphorus and nitrogen.
switchgrass, little bluestem, sand reedgrass, and western In nonirrigated areas this soil is suited to winter wheat
wheatgrass. Indiangrass, sand bluestem, prairie cordgrass, barley, and sorghum. Most of the acreage is planted t,
slender wheatgrass, alkali sacaton, saltgrass, sedge, and winter wheat. The predicted average yield is 20 bushel.
rush are also present. Potential production ranges from per acre. The soil is summer fallowed in alternate year.
4,000 pounds per acre in favorable years to 3,000 pounds to allow moisture accumulation. Generally precipitation is
in unfavorable years. As range condition deteriorates, the too low for beneficial use of fertilizer.
switchgrass, sand bluestem, indiangrass, little bluestem, Stubble mulch farming, striperopping, and minimum
and prairie cordgrass decrease, and saltgrass, blue grama, lage are needed to control soil blowing and water erosior
sand dropseed, sedge, and rush increase. Undesirable Terracing also may be needed to control water erosion.
weeds and annuals invade the site as range condition The potential native vegetation on this range site i.
becomes poorer. dominated by sand bluestem, sand reedgrass, and blu
Seeding with an interseeder is advisable if the range is grama. Needleandthread, switchgrass, sideoats gram
in poor condition. Sand reedgrass, sand bluestem, sideoats and western wheatgrass are also prominent. Potentis
grama, switchgrass, little bluestem, indiangrass, and blue production ranges from 2,200 pounds per acre in favora
grama are suitable for seeding. Seeding early in spring ble years to 1,800 pounds in unfavorable years. As rang
has proven most successful. Grazing should be light to condition deteriorates, the sand bluestem, sand reedgrass
prevent range deterioration. and switchgrass decrease and blue grama, sand dropseec
Wildlife is an important secondary use of this unit. On and sand sage increase. Annual weeds and grasses invade
the Valent soil, rangeland wildlife, for example, the the site as range condition becomes poorer.
pronghorn antelope, can be attracted by developing Management of vegetation on this soil should be base(
livestock watering facilities, managing livestock grazing, on taking half and leaving half of the total annual produc
and reseeding where needed. tion. Seeding is desirable if the range is in poor condition.
The Loup soil, which is typically wet and produces an Sand bluestem, sand reedgrass, switchgrass, sideoat.
abundance of wetland vegetation, attracts wetland wil- grama, blue grama, pubescent wheatgrass, and create,
dlife species, such as mallard, teal, geese, and miscellane- wheatgrass are suitable for seeding. The grass selecte'
ous shorebirds. Primary management of this soil for wet- should meet the seasonal requirements of livestock. I
land wildlife includes managing livestock grazing, fencing should be drilled into a clean, firm sorghum stubble or :
to control livestock, protecting from fire, and preventing prepared seedbed. Seeding early in spring has prove!
drainage. Natural wetland vegetation should be allowed most successful
to develop. Capability subclass VIe irrigated, VIe nonir- Windbreaks and environmental plantings are fairly we
rigated; Valent soil in Choppy Sand Meadow range site, suited to this soil. Blowing sand and low available wate
Loup soil in Sandy Meadow range site. capacity are the principal hazards in establishing tree
72—Vona loamy sand, 0 to 3 percent slopes. This is a and shrubs. The soil is so loose that trees should b,
deep, somewhat excessively drained soil on plains and planted in shallow furrows and vegetation maintaine(
high terraces at elevations of 4,600 to 5,200 feet. It between the rows. Supplemental irrigation is needed t.
formed in eolian or alluvial deposits. Included in mapping insure survival. Trees that are best suited and have goo(
are some leveled areas. Also included are small areas of survival are Rocky Mountain juniper, eastern redcedaar
soils that have a loamy substratum and some areas of ponderosa pine, and Siberian elm. The shrubs best suites
soils that are noncalcareous to a depth of 60 inches. are skunkbush sumac, lilac, and Siberian peashrub.
Typically the surface layer of this Vona soil is grayish Wildlife is an important secondary use of this soil. The
brown. The upper 6 inches is loamy sand and the lower 6 cropland areas provide favorable habitat for ring-neckec.
inches is fine sandy loam. The subsoil is brown and light pheasant and mourning dove. Many nongame species car
WELD COUNTY, COLORADO, SOUTHERN PART 47
be attracted by establishing areas for nesting and escape wheatgrass are suitable for seeding. The grass selected
—'r. For pheasants, undisturbed nesting cover is essen- should meet the seasonal requirements of livestock. It can
t, and should be included in plans for habitat develop- be seeded into a clean, firm sorghum stubble, or it can be
ment, especially in areas of intensive agriculture. Range- drilled into a firm prepared seedbed. Seeding early in
land wildlife, for example, the pronghorn antelope, can be spring has proven most successful.
attracted by developing livestock watering facilities, Windbreaks and environmental plantings are fairly well
managing livestock grazing, and reseeding where needed. suited to this soil. Blowing sand and low available water
This soil has good potential for urban and recreational capacity are the principal hazards in establishing trees
development. Once established, the lawns, shrubs, and and shrubs. The soil is so loose that trees should be
trees grow well. The chief limiting soil feature is the planted in shallow furrows and vegetation maintained
rapid permeability in the substratum, which causes a between the rows. Supplemental irrigation may be needed
hazard of ground water contamination from sewage to insure survival. Trees that are best suited and have
lagoons. In places recreational development is limited by good survival are Rocky Mountain juniper, western
the susceptibility to soil blowing. Capability subclass IIIe redcedar, ponderosa pine, and Siberian elm. The shrubs
best suited are skunkbush sumac, lilac, and Siberian
irrigated, We nonirrigated; Sandy Plains range site. +
73—Vona loamy sand, 3 to 5 percent slopes. This is a peashrub.
Wildlife is an important secondary use of this soil. The
deep, somewhat excessively drained soil on plains and cropland areas provide favorable habitat for ring-necked
high terraces at elevations of 4,600 to 5,200 feet. It pheasant and mourning dove. Many nongame species can
formed in eolian or alluvial deposits. Included in mapping be attracted by establishing areas for nesting and escape
are some leveled areas. Also included are small areas of cover. For pheasants, undisturbed nesting cover is essen-
soils that have a loamy substratum and some areas of tial and should be included in plans for habitat develop-
soils that are non calcareous to a depth of 60 inches. ment, especially in areas of intensive agriculture. Range-
Typically the surface layer of this Vona soil is grayish land wildlife, for example, the pronghorn antelope, can be
brown. The upper 6 inches is loamy sand and the lower 5 attracted by developing livestock watering facilities,
inches is fine sandy loam. The subsoil is brown and light managing livestock grazing, and reseeding where needed.
yellowish brown fine sandy loam about 14 inches thick. This soil has good potential for urban and recreational
The substratum to a depth of 60 inches is sandy loam. development. Once established, the lawns, shrubs, and
Permeability is moderately rapid. Available water trees grow well. The primary limiting soil feature is the
capacity is moderate. The effective rooting depth is 60 rapid permeability in the substratum, which causes a
es or more. Surface runoff is slow, and the erosion hazard of ground water contamination from sewage
1.._.ard is low. lagoons. In places recreational development is limited by
This soil is suited to limited cropping. Intensive the susceptibility to soil blowing. Capability subclass IVe
cropping is hazardous because of soil blowing. The irri•
gated, VIe nonirrigated; Sandy Plains range site.
cropping system should be limited to such close grown 74—Vona loamy sand, 5 to 9 percent slopes. This is a
crops as alfalfa, wheat, and barley. The soil is also suited deep, somewhat excessively drained soil on plains at
to irrigated pasture. A suitable cropping system is 3 to 4 elevations of 4,600 to 5,200 feet. It formed in eolian
years of alfalfa followed by 2 years of corn and small deposits. Included in mapping are small areas of soils that
grain and alfalfa seeded with a nurse crop. have a loamy substratum and areas of soils that are non-
Closely spaced contour ditches or sprinklers can be calcareous to a depth of 60 inches.
used in irrigating close grown crops. Contour furrows or Typically the surface layer is grayish brown. The upper
spinklers should be used for new crops. Application of 6 inches is loamy sand and the lower 4 inches is fine
barnyard manure and commercial fertilizer helps to main- sandy loam. The subsoil is brown and light yellowish
tain good production. brown fine sandy loam about 12 inches thick. The sub-
The potential native vegetation on this range site is stratum to a depth of 60 inches is loamy sand.
dominated by sand bluestem, sand reedgrass, and blue Permeability is moderately rapid. Available water
grama. Needleandthread, switchgrass, sideoats grama, capacity is moderate. The effective rooting depth is 60
and western wheatgrass are also prominent. Potential inches or more. Surface runoff is medium, and the erosion
production ranges from 2,200 pounds per acre in favora- hazard is low.
ble years to 1,800 pounds in unfavorable years. As range The potential native vegetation on this range site is ,
condition deteriorates, the sand bluestem, sand reedgrass, dominated by sand bluestem, sand reedgrass, and blue
and switchgrass decrease and blue grama, sand dropseed, grama. Needleandthread, switchgrass, sideoats grama,
and sand sage increase. Annual weeds and grasses invade and western wheatgrass are also prominent. Potential
the site as range condition becomes poorer. production ranges from 2,200 pounds per acre in favora-
Management of vegetation on this soil should be based ble years to 1,800 pounds in unfavorable years. As range
on taking half and leaving half of the total annual produc- condition deteriorates, the sand bluestem, sand reedgrass,
tion. Seeding is desirable if the range is in poor condition. and switchgrass decrease and blue grama, sand dropseed,
Snaid bluestem, sand reedgrass, switchgrass, sideoats and sand sage increase. Annual weeds and grasses invade
na, blue grama, pubescent wheatgrass, and crested the site as range condition becomes poorer.
48 SOIL SURVEY
Management of vegetation on this soil should be based Windbreaks and environmental plantings are generally
on taking half and leaving half of the total annual produc- suited to this soil. Soil blowing, the principal hazard in
tion. Seeding is desirable if the range is in poor condition. establishing trees and shrubs, can be controlled by cul-
Sand bluestem, sand reedgrass, switchgrass, sideoats tivating only in the tree row and by leaving a strip of
grama, blue grama, pubescent wheatgrass, and crested vegetation between the rows. Supplemental irrigation
wheatgrass are suitable for seeding. The grass selected may be necessary at the time of planting and during the
should meet the seasonal requirements of livestock. It can dry periods. Trees that are best suited and have good
be seeded into a clean, firm sorghum stubble, or it can be survival are Rocky Mountain juniper, eastern redcedar,
drilled into a firm prepared seedbed. Seeding early in ponderosa pine, Siberian elm, Russian-olive, and hackber-
spring has proven most successful. ry. The shrubs best suited are skunkbush sumac, lilac, and
Windbreaks and environmental.plantings are fairly well Siberian peashrub.
suited to this soil. Blowing sand and low available water Wildlife is an important secondary use of this soil.
capacity are the principal hazards in establishing trees Ring-necked pheasant, mourning dove, and many non-
and shrubs. This soil is so loose that trees should be game species can be attracted by establishing areas for
planted in shallow furrows and vegetation maintained nesting and escape cover. For pheasants, undisturbed
between the rows. Supplemental irrigation may be needed nesting cover is essential and should be included in plans
to insure survival. Trees that are best suited and have for habitat development, especially in areas of intensive
good survival are Rocky Mountain juniper, eastern agriculture.
redcedar, ponderosa pine, and Siberian elm. The shrubs This soil has good potential for urban and recreational
best suited are skunkbush sumac, lilac, and Siberian development. Lawns, shrubs, and trees grow well. The
peashrub. only limiting feature is the rapid permeability in the sub-
Wildlife is an important secondary use of this soil. Ran- stratum, which causes a ha>ard of ground water con-
geland wildlife, for example, the pronghorn antelope, can tamination from sewage lagoons. Capability subclass Its
be attracted by developing livestock watering facilities, irrigated.
managing livestock grazing, and reseeding where needed. 76—Vona sandy loam, 1 to 3 percent slopes. This is a
This soil has good potential for urban and recreational deep, well drained soil on plains and high terraces at
development. Once established, the lawns, shrubs, and elevations of 4,600 to 5,200 feet. It formed in eolian and
trees grow well. The primary limiting soil feature is the alluvial deposits. Included in mapping are some leveled
rapid permeability in the substratum, which causes a areas. Also included are small areas of soils that have a
loamy substratum and areas of soils that are noncalcare-
hazard of ground water contamination from sewage ous to a depth of 60 inches.
lagoons. In places recreational development is limited by
Typically the surface layer of this Vona soil is grayish
the susceptibility to soil blowing. Capability subclass VIe brown sandy loam about 10 inches thick. The subsoil is
irrigated, VIe nonirrigated; Sandy Plains range site. brown fine sandy loam about 18 inches thick. The sub-
75—Vona sandy loam, 0 to 1 percent slopes. This is a stratum to a depth of 60 inches is sandy loam.
deep, well drained soil on high terraces at elevations of Permeability is moderately rapid. Available water
4,650 to 4,950 feet. It formed in alluvial deposits. Included capacity is moderate. The effective rooting depth is 60
in mapping are some leveled areas and small areas of inches or more. Surface runoff is slow, and the erosion
soils that have a loamy substratum. hazard is low.
Typically the surface layer of this Vona soil is grayish In irrigated areas this soil is suited to all crops com-
brown sandy loam about 10 inches thick. The subsoil is monly grown in the area, including corn, sugar beets,
brown fine sandy loam about 20 inches thick. The sub- beans, alfalfa, small grain, and onions. An example of a
stratum to a depth of 60 inches is sandy loam. suitable cropping system is 3 to 4 years of alfalfa fol-
Permeability is moderately rapid. Available water lowed by corn, corn for silage, sugar beets, small grain, or
capacity is moderate. The effective rooting depth is 60 beans. Land leveling, ditch lining, and installing pipelines
inches or more. Surface runoff is slow, and the erosion are needed for proper water applications.
hazard is low. All methods of irrigation are suitable, but furrow ir-
This soil is used almost entirely for irrigated crops. It rigation is the most common. Barnyard manure and com-
is suited to all crops commonly grown in the area, includ- mercial fertilizer are needed for top yields.
ing corn, sugar beets, beans, alfalfa (fig. 7), small grain, Windbreaks and environmental plantings are generally
potatoes, and onions. An example of a suitable cropping suited to this soil. Soil blowing, the principal hazard in
system is 3 to 4 years of alfalfa followed by corn, corn for establishing trees and shrubs, can be controlled by cul-
silage, sugar beets, small grain, or beans. The rapidly tivating only in the tree row and by leaving a strip of
permeable substratum slightly restricts some crops. vegetation between the rows. Supplemental irrigation
All methods of irrigation are suitable, but furrow ir- may be necessary at the time of planting and during dry
rigation is the most common. Proper irrigation manage- periods. Trees that are best suited and have good survival
ment is essential. Barnyard manure and commercial fertil- are Rocky Mountain juniper, eastern redcedar, ponderosa
izer are needed for top yields. pine, Siberian elm, Russian-olive, and hackberry. The
94 SOIL SURVEY
TABLE 4.--ACREAGE AND PROPORTIONATE EXTENT OF THE SOILS
— Map i Soil name Acres Percent
symbol ;
1 {Altvan loam, 0 to 1 percent slopes 19,740 1.7
2 Altvan loam, 1 to 3 percent slopes 2,140 0.2
3 Aquolls and Aquents, gravelly substratum 34,030 3.0
4 Aquolls and Aquepts, flooded 22,530 2.0
5 Ascalon sandy loam, 1 to 3 percent slopes 12,280 1.1
6 Ascalon sandy loam, 3 to 5 percent slopes 8,452 0.7
7 Ascalon sandy loam, 5 to 9 percent slopes 640 0.1
8 Ascalon loam, 0 to 1 percent slopes 4,290 , 0.4
9 Ascalon loam, 1 to 3 percent slopes 960 0.1
10 Bankard sandy loam, 0 to 3 percent slopes 19,980 ; 1.7
11 Bresser sandy loam, 0 to 1 percent slopes 1 ,620 0.1
12 Bresser sandy loam, 1 to 3 percent slopes 1,220 0.1
13 Cascajo gravelly sandy loam, 5 to 20 percent slopes 1,830 ; 0.2
14 Colby loam, 0 to 1 percent slopes 7,748 0.7
15 Colby loam, 1 to 3 percent slopes 19,310 1.7
16 Colby loam, 3 to 5 percent slopes 7,220 0.6
17 Colby loam, 5 to 9 percent slopes 3,930 0.3
18 Colby-Adena loans, 3 to 9 percent slopes 21 ,060 ; 1 .8
19 Colombo clay loam, 0 to 1 percent slopes 9,110 0.8
20 Colombo clay loam, 1 to 3 percent slopes 4, 120 0.4
21 Dacono clay loam, 0 to 1 percent slopes 10,960 1 .0
22 Dacono clay loam, 1 to 3 percent slopes 1 ,300 ; 0. 1
23 Fort Collins loam, 0 to 1 percent slopes 880 0. 1
24 Fort Collins loam, 1 to 3 percent slopes 2,540 0.2
25 Haverson loam, 0 to 1 percent slopes 10,890 0.9
26 Haverson loam, 1 to 3 percent slopes 9,290 0.8
27 Heldt silty clay, 1 to 3 percent slopes 2,170 0.2
28 Heldt silty clay, 3 to 5 percent slopes 140 ;
29 Julesburg sandy loam, 0 to 1 percent slopes 6,920 0.6
30 Julesburg sandy loam, 1 to 3 percent slopes 2,040 0.2
31 Kim loam, 0 to 1 percent slopes 4,150 0.4
32 Kim loam, 1 to 3 percent slopes 40,960 3.6
33 Kim loam, 3 to 5 percent slopes 7,090 0.6
34 Kim loam, 5 to 9 percent slopes 6,250 0.5
35 Loup-Boel loamy sands, 0 to 3 percent slopes 11 ,050 1 .0
36 Midway-Shingle complex, 5 to 20 percent slopes 1 ,630 0. 1
37 Nelson fine sandy loam, 0 to 3 percent slopes 3,820 0.3
38 Nelson fine sandy loam, 3 to 9 percent slopes 6,210 0.5
39 Nunn loam, 0 to 1 percent slopes 7,740 0.7
40 Nunn loam, 1 to 3 percent slopes 16,520 1 .4
41 Nunn clay loam, 0 to 1 percent slopes 20,900 1 .9
42 Nunn clay loam, 1 to 3 percent slopes 18,940 1 .6
43 Nunn loamy sand, 0 to 1 percent slopes 2,320 0.2
44 Olney loamy sand, 1 to 3 percent slopes 19,950 1.7
45 Olney loamy sand, 3 to 5 percent slopes 3,330 0.3
46 Olney fine sandy loam, 0 to 1 percent slopes 8,730 ; 0.8
47 Olney fine sandy loam, 1 to 3 percent slopes 58,300 5. 1
48 Olney fine sandy loam, 3 to 5 percent slopes 15,040 1 .3
49 Osgood sand, 0 to 3 percent slopes 38,100 3.3
50 Otero sandy loam, 0 to 1 percent slopes 4, 190 0.4
51 Otero sandy loam, 1 to 3 percent slopes 30,970 , 2.7
52 Otero sandy loam, 3 to 5 percent slopes 13,440 1 .2
53 Otero sandy loam, 5 to 9 percent slopes 6,710 0.5
54 Paoli loam, 0 to 1 percent slopes 600 0. 1
55 Paoli loam, 1 to 3 percent slopes 250 ; *
56 Renohill clay loam, 0 to 3 percent slopes 4,020 0.3
57 Renohill clay loam, 3 to 9 percent slopes 4,860 ; 0.4
58 Shingle loam, 1 to 3 percent slopes 1 ,540 0. 1
59 Shingle loam, 3 to 9 percent slopes 1 ,160 0.1
60 Shingle-Renohill complex, 3 to 9 percent slopes 1,090 I 0. 1
61 Tassel fine sandy loam, 5 to 20 percent slopes 6,140 0.5
62 Terry fine sandy loam, 0 to 3 percent slopes 1,990 0.2
63 Terry fine sandy loam, 3 to 9 percent slopes 6,800 0.6
64 Thedalund loam, 1 to 3 percent slopes 7,580 0.7
65 Thedalund loam, 3 to 9 percent slopes 3,600 0.3
66 Ulm clay loam, 0 to 3 percent slopes 4,610 0.4
67 Ulm clay loam, 3 to 5 percent slopes 2,810 , 0.2
68 Ustic Torriorthents, moderately steep 2,900 ; 0.3
69 Valent sand, 0 to 3 percent slopes 65,950 5.7
. 70 Valent sand, 3 to 9 percent slopes 174,010 15.0
See footnote at end of table.
•
A
WELD COUNTY, COLORADO, SOUTHERN PART 95
TABLE 4.--ACREAGE AND PROPORTIONATE EXTENT OF THE SOILS--Continued
Map Soil name Acres Percent
symbol
71 Valent-Loup complex, 0 to 9 percent slopes 3,520 0.3
72 Vona loamy sand, 0 to 3 percent slopes 66,670 5.8
73 Vona loamy sand, 3 to 5 percent slopes 18,390 1.6
74 Vona loamy sand, 5 to 9 percent slopes 31 ,045 2.7
75 Vona sandy loam, 0 to 1 percent slopes 5,260 0.5
76 Vona sandy loam, 1 to 3 percent slopes 14,600 1 .3
77 Vona sandy loam, 3 to 5 percent slopes 6,310 0.5
78 weld loam, 0 to 1 percent slopes 5,820 0.5
79 Weld loam, 1 to 3 percent slopes 60,470 5.2
80 Weld loam, 3 to 5 percent slopes 2,300 0.2
81 Wiley-Colby complex, 0 to 1 percent slopes 790 0.1
82 Wiley-Colby complex, 1 to 3 percent slopes 26,615 2.3 I
83 Wiley-Colby complex, 3 to 5 percent slopes 6,870, 0.6
Water 17,750 1 .5
Total " 1 ,152,000 100.0
• Less than 0.1 percent. ,
96 - SOIL SURVEY ,
.ABLE 5.--YIELDS PER ACRE OF IRRIGATED C.,JPS
[All yields were estimated for a high level of management in 1975. Absence of a yield figure indicates the
crop is seldom grown or is not suited]
Soil name and Beans,
map symbol Alfalfa hay Sugar beets Corn Corn silage dry pinto Onions ; Potatoes
Ton Ton Bu Ton Lb Sack " Cut
1, 2 5.0 23 160 33 2400 525 325
Altvan
3
Aquolls
Aquolls
Ascalon
F
Ascalon
•
Ascalon
8 5.5 24 180 35 2700 550 350
Ascalon
9 5.5 23 160 33 2400 525 325
Ascalon
10 2.5 --- 50 --- --- __- __-
Bankard
11 5.5 24 180 35 2700 550 350
Bresser
12 5.5 23 160 33 2400 525 325
Bresser
Cascajo
14 5.5 24 180 35 2700 --- ---
Colby
15 5.5 23 160 33 2400 --- ---
Colby
16 4.0 18 100 23 1800 --- ---
Colby
17 3.0 --- 80 20 --- --- ---
Colby
18 ___ -__ ___ ___ ___ ___ ___
Colby
19* 5.5 24 170 35 2700 550 350
Colombo
20* 5.5 23 160 33 2400 525 325
Colombo
21 5.5 26 170 33 2400 525 325
Dacono
22 5.5 25 150 30 2400 525 325
Dacono
23 5.5 24 180 35 2700 550 ---
Fort Collins
See footnote at end of table.
98 SOIL SURVEY
TABLE b.--YIELDS PER ACRE OF IRRIGATED CROPS--Continued
Soil name and Beans,
map symbol Alfalfa hay Sugar beets Corn ;Corn silage dry pinto Onions Potatoes
Ton Ton Bu Ton Lb Sack Cwt
47 5.5 23 160 33 2400 525 325
Olney
48 4.0 --- 100 25 1800 --- ---
Olney
49 3.0 --- 80 20 --- --- ---
Osgood
50 5.5 23 170 33 2400 525 325
Otero
51 5.0 22 150 30 1800 500 ---
Otero
52 4.0 18 100 25 --- 1-- ---
Otero
53 3.0 --- 80 20 --- --- ---
Otero
54 5.0 23 180 35 2700 --- 350
Paoli
55 5.0 23 160 33 2400 --- 325
Paoli
56 3.0 18 100 25 --- --- ---
Renohill
57 2.0 --- 80 20 --- --- ---
Renohill
58 2.0 --- --- 17 --- --- __—
Shingle
59 --- --- --- --- --- --- ---
Shingle
60 --- ___ --- ___ ___ ___ ___
Shingle
61 --- --- --- ___ ___ ___ ---
Tassel
62 4.0 20 120 30 2400 --- ---
Terry
63 3.0 --- 70 25 --- --- ---
Terry
64 4.0 20 130 30 2400 --- ---
Thedalund
65 3.0 --- 80 25 --- --- ---
Thedalund
65 5.5 --- 160 33 --- --- ---
Ulm
67 4.0 --- 100 25 --- --- ---
Ulm
68** ___ ___ ___ ___ ___ ___ ___
Ustic Torriorthents
69, 70 3.5 --- 80 22 --- --- ---
Valent
71 --- ___ --- ___ ___ ___ ___
Valent
See footnote at end of table.
WELD COUNTY, COLORADO, SOUTHERN PART 99
TABLE 5.--YIELDS PER ACRE OF IRRIGATED CROPS--Continued
Soil name and Beans,
map symbol Alfalfa hay Sugar beets Corn Corn silage dry pinto Onions Potatoes
Ton Ton Bu Ton Lb Sack Cut
72 4.5 20 140 30 --- 275
Vona
73 3.5 --- 80 22 --- ---
Vona
74 --- --- ---
Vona
75 5.0 23 160 30 2400 525
Vona 325
76 4.5 20 140
30 1800 525 325
Vona
n
77 4.0 18 100 25 --- --- ---
Vona
78 5.5 24 180 35 2700 ___
Weld
79 5.5 23 160 33 2400 ___
Weld
30 4.0 20 100 25 1800 ---
Weld
81 5.5 24 180 35 2700 --- _--
Wiley
32-- 5.5 23 160 33 2400 --- ___
83 4.0 20 100 25 1800 ___
Wiley
* Yields are for areas protected from flooding.
** See map unit description for the composition and behavior of the map unit.
100 SOIL SURVEY
TABLE 6.--BUILDING SITE DEVELOPMENT
[Some of the terms used in this table to describe restrictive soil features are defined in the Glossary. See
text for definitions of "slight," "moderate," and "severe." Absence of an entry means soil was not
rated]
Soil name and Shallow Dwellings Dwellings Small 1 Local roads
map symbol excavations without with commercial and streets
basements basements buildings
1 , 2 Severe: Moderate: Moderate: Moderate: ;Moderate:
Altvan cutbanks cave. shrink-swell. shrink-swell. shrink-swell. 1 shrink-swell,
1 frost action.
3•:
Aquolls Severe: Severe: Severe: Severe: ;Severe:
floods, floods, floods, floods, ; floods,
wetness. wetness. wetness. wetness. wetness,
frost action.
s
Aquents Severe: Severe: Severe: Severe: Severe:
floods, floods, floods, floods, floods,
wetness. wetness. wetness. wetness. wetness,
frost action.
4e:
Aquolls Severe: Severe: Severe: Severe: Severe:
floods, floods, floods, floods, floods,
wetness. wetness. wetness. wetness. wetness,
frost action.
Aquepts Severe: Severe: Severe: Severe: ,Severe:
floods, floods, floods, floods, floods,
wetness. wetness. wetness. wetness. ; wetness,
frost action.
5 Slight Moderate: Moderate: Moderate: ;Moderate:
_ Ascalon low strength. low strength. low strength. I frost action,
I low strength.
6, 7 Slight Moderate: Moderate: Moderate: ;Moderate:
Ascalon low strength. low strength. slope, ; frost action,
low strength. I low strength.
8, 9 Slight Moderate: Moderate: Moderate: ;Moderate:
Ascalon low strength. low strength. low strength. ; frost action,
; low strength.
10 Severe: Severe: Severe: Severe: ;Severe:
Bankard cutbanks cave, floods. floods. floods. ; floods.
floods.
11 , 12 Slight Slight Slight Slight ;Moderate:
Bresser ; frost action.
13 Severe: Moderate: Moderate: Severe: Moderate:
Cascajo cutbanks cave, slope. slope. slope. slope.
small stones.
14, 15 Slight Slight Slight Slight Moderate:
Colby low strength.
16, 17 Slight Slight Slight Moderate: Moderate:
Colby slope. low strength.
18f:
Colby Slight Slight Slight Moderate: Moderate:
slope. low strength.
Adena Slight Moderate: Moderate: Moderate: Moderate:
low strength. I low strength. , low strength, low strength.
slope.
See footnote at end of table.
WELD COUNTY, COLORADO, SOUTHERN PART 103
TABLE 6.--BUILDING SITE DEVELOPMENT--Continued
. oil name and Shallow Dwellings Dwellings Small Local roads
map symbol excavations without with commercial and streets
basements basements buildings
66, 67 Moderate: Severe: Severe: Severe: Severe:
Ulm too clayey. shrink-swell. shrink-swell. shrink-swell. low strength,
shrink-swell.
68* Severe: Moderate: Moderate: Moderate: Moderate:
Ustic small stones, slope. slope. slope. slope.
Torriorthents cutbanks cave.
69 Severe: Slight Slight Slight Slight.
Valent cutbanks cave.
70 Severe: Slight Slight Moderate: Slight.
Valent cutbanks cave. slope.
71*:
Valent Severe: Slight Slight Moderate: Slight.
cutbanks cave. slope.
Loup Severe: Severe: Severe: Severe: Severe:
wetness, wetness, wetness, wetness, wetness.
cutbanks cave. floods. floods. floods.
72 Slight Slight Slight Slight moderate:
Vona low strength.
73, 74 Slight Slight Slight ,Moderate: Moderate:
Vona ; slope. low strength.
75, 76 Slight Slight Slight ;Slight Moderate:
Vona low strength.
7 Slight Slight Slight ;Moderate: Moderate:
4--a ; slope. low strength.
78, 79 Slight Moderate: Moderate: :Moderate: Moderate:
Weld low strength, low strength, ; low strength, low strength,
shrink-swell. shrink-swell. shrink-swell. shrink-swell,
frost action.
80 Slight Moderate: Moderate: Moderate: Moderate:
Weld low strength, low strength, low strength, low strength,
shrink-swell. shrink-swell. slope, shrink-swell,
shrink-swell. frost action.
81", 82*:
Wiley Slight Moderate: Moderate: Moderate: Moderate:
low strength, low strength, low strength, low strength,
shrink-swell. shrink-swell. shrink-swell. shrink-swell.
Colby Slight Slight Slight Slight Moderate:
low strength.
83*:
Wiley Slight Moderate: Moderate: Moderate: Moderate:
low strength, low strength, low strength, low strength,
shrink-swell. shrink-swell. slope, shrink-swell.
shrink-swell.
Colby Slight Slight Slight Moderate: Moderate:
slope. low strength.
• See map unit description for the composition and behavior of the map unit.
104 SOIL SURVEY
TABLE 7.--SANITARY FACILITIES
[Some of the terms used in this table to describe restrictive soil features are defined in the Glossary. See
text for definitions of "slight," "moderate," "good," "fair," and other terms used to rate soils.
Absence of an entry means soil was not rated]
Soil name and Septic tank Sewage lagoon Trench Area Daily cover
map symbol absorption areas sanitary sanitary for landfill
fields landfill landfill
1 , 2 Slight Severe: Severe: Slight Fair:
Altvan seepage. seepage. thin layer.
3*:
Aquolls Severe: Severe: Severe: Severe: Poor:
floods, floods, floods, wetness. wetness.
wetness. wetness. wetness.
Aquents Severe: Severe: Severe: Severe: Poor:
floods, floods, floods, wetness. wetness.
wetness. wetness, wetness.
4*:
Aquolls Severe: Severe: Severe: Severe: Poor:
floods, floods, floods, wetness. 1 wetness.
wetness. wetness, wetness.
Aquepts Severe: Severe: Severe: Severe: Poor:
floods, floods, floods, wetness. wetness.
wetness. wetness. wetness.
5, 6 Slight Severe: Severe: Severe: ' ,Good.
Ascalon seepage. seepage. seepage.
7 Slight Severe: Severe: Severe: :Good.
Ascalon slope, seepage. seepage. ,
seepage.
8, 9 Slight Severe: Severe: Severe: Good.
Ascalon seepage. seepage. seepage.
10 Severe: Severe: Severe: Severe: Fair:
Bankard floods. floods, floods, floods. too sandy.
seepage. seepage.
11 , 12 Slight Severe: Severe: Severe: Good.
Bresser seepage. seepage. seepage.
13 Moderate: Severe: Severe: Severe: Poor:
Cascajo slope. slope, seepage. seepage. small stones.
seepage,
small stones.
14, 15, 16 Slight Moderate: Slight Slight Good.
Colby seepage.
17 Slight Severe: Slight Slight Good.
Colby slope.
18*:
Colby Slight Severe: Slight Slight Good.
slope.
Adena Moderate: Moderate: Slight Slight Good.
percs slowly. seepage,
slope.
19 Moderate: Severe: Moderate: Moderate: Good.
Colombo floods. floods. floods. floods.
20 Slight Moderate: Slight ;Slight Good.
Colombo slope,
seepage.
See footnote at end of table.
106 SOIL SURVEY
TABLE 7.--SANITARY FACILITIES--Continued
Soil name and Septic tank Sewage lagoon Trench Area Daily cover
map symbol absorption areas sanitary sanitary for landfill
fields landfill landfill
43 Severe: Moderate: Slight Slight Fair:
Nunn percs slowly. excess humus. too clayey.
Y Y•
44, 45, 46, 47, 48-- Slight Severe: Slight Slight Good.
Olney seepage.
49 Slight Severe: Severe: Severe: Fair:
Osgood Seepage. seepage. seepage. too sandy.
50, 51 , 52 Slight Severe: Slight Slight Good.
Otero seepage.
53 Slight Severe: Slight Slight Good.
Otero slope,
seepage.
54 Slight Severe: Severe: Severe: Good.
Paoli seepage. seepage. seepage.
55 Slight Severe: Severe: Severe: Good.
Paoli seepage. seepage. seepage.
56, 57 Severe: Severe: Severe: Slight Fair:
Renohill percs slowly, depth to rock. depth to rock. too clayey,
depth to rock. thin layer.
58, 59 Severe: Severe: Severe: Slight Poor:
Shingle depth to rock. depth to rock. depth to rock. thin layer.
60•:
Shingle Severe: Severe: Severe: Slight Poor:
depth to rock. depth to rock. depth to rock. thin layer.
Renohill Severe: Severe: Severe: Slight Fair:
percs slowly, depth to rock. depth to rock. too clayey,
depth to rock. thin layer.
61 Severe: Severe: Severe: Severe: Poor:
Tassel depth to rock. depth to rock, depth to rock, seepage. thin layer,
seepage, seepage. area reclaim.
slope.
62, 53 Severe: Severe: Severe: Slight Fair:
Terry depth to rock. depth to rock, depth to rock. thin layer,
seepage. area reclaim.
64, 65 Severe: Severe: Severe: Slight Fair:
Thedalund depth to rock. depth to rock. depth to rock. thin layer.
66 Severe: Slight Moderate: Slight Poor:
Ulm percs slowly. too clayey. too clayey.
67 Severe: Moderate: ;Moderate:. Slight Poor:
Ulm percs slowly. slope. too clayey. too clayey.
68* Moderate: ',Severe: Severe: Severe: Poor:
Ustic Torriorthents slope. seepage, seepage, seepage. too sandy,
small stones. too sandy. small stones.
59, 70 Slight Severe: Severe: Severe: Poor:
Valent seepage. too sandy, seepage. too sandy.
seepage.
71*:
Valent Slight Severe: Severe: ;Severe: Poor:
seepage. too sandy, ; seepage. too sandy.
seepage.
_ See footnote at end of table.
WELD COUNTY, COLORADO, SOUTHERN PART 107
--
r
TABLE 7.--SANITARY FACILITIES--Continued
.,oil name and Septic tank 1 Sewage lagoon Trench Area Daily cover
map symbol absorption areas sanitary sanitary for landfill
fields landfill landfill
i
71':
Loup Severe: Severe: Severe: Severe: Poor:
wetness, wetness, wetness, wetness, wetness.
floods. seepage, seepage, seepage,
floods. floods. floods.
72, 73 Slight Severe: Slight Slight Good.
Vona seepage.
74 Slight Severe: Slight Slight Good.
Vona seepage,
slope. 1
75, 76, 77 Slight Severe: Slight Slight Good.
Vona seepage. "
78 Moderate: Moderate: Slight Slight Good.
Weld peres slowly. seepage.
79, 8Q Moderate: Moderate: Slight Slight Good.
Weld peres slowly. slope,
seepage.
81*:
Wiley Moderate: :Moderate: Slight Slight Fair:
peres slowly. ; seepage. too clayey.
Colby Slight ;Moderate: Slight Slight Good.
seepage.
82'- 83':
4 r Moderate: :Moderate: Slight Slight Fair:
peres slowly. ; seepage, too clayey.
slope.
Colby Slight ;Moderate: Slight Slight Good.
seepage.
' See map unit description for the composition and behavior of the map unit.
108 SOIL SURVEY
TABLE 8.--CONSTRUCTION MATERIALS
[Some of the terms used in this table to describe restrictive soil features are defined in the Glossary. See
text for definitions of "good," "fair," "poor," and "unsuited." Absence of an entry means soil was not
rated]
Soil name and Roadfill Sand Gravel Topsoil
map symbol
1 , 2 Good Fair: Fair: Fair:
Altvan excess fines. excess fines. thin layer.
3•:
Aquolls Poor: Good Fair: Poor:
wetness, excess fines, wetness.
frost action.
Aquents Poor: Good Fair: Poor:
wetness, excess fines. wetness.
frost action. r
u*:
Aquolls Poor: Unsuited Unsuited Poor:
wetness, wetness..
frost action.
Aquepts Poor: Unsuited Unsuited Poor:
wetness, wetness.
frost action.
5, 6, 7, 8, 9 Fair: Poor: Unsuited Good.
Ascalon low strength, excess fines.
frost action,
shrink-swell.
10 Fair: Fair: Unsuited Poor:
Bankard low strength. excess fines. too sandy.
11 , 12 Fair: Poor: Unsuited Fair:
Bresser frost action. excess fines. small stones.
13 Good Good Good Poor:
Cascajo small stones.
14, 15, 16, 17 Fair: Unsuited Unsuited Good.
Colby low strength.
18*:
Colby Fair: Unsuited Unsuited Good.
low strength.
Adena Fair: Unsuited Unsuited Fair:
low strength. too clayey.
19, 20 Fair: Unsuited Unsuited Fair:
Colombo low strength, too clayey.
frost action.
21 , 22 Good Good Good Fair:
Dacono too clayey.
23, 24 ;Fair: Unsuited Unsuited Good.
Fort Collins ; low strength.
25, 26 ;Fair: Unsuited Unsuited Good.
Haverson ; low strength.
27, 28 ;Poor: Unsuited Unsuited Poor:
Heldt ; shrink-swell, too clayey.
low strength.
See footnote at end of table.
110 SOIL SURVEY
TABLE 8.--CONSTRUCTION MATERIALS--Continued
Soil name and Roadfill Sand Gravel Topsoil
map symbol
I _ _
60*:
Renohill Poor: Unsuited Unsuited Poor:
low strength, thin layer.
thin layer.
61 Poor: Unsuited Unsuited Poor:
Tassel thin layer, area reclaim.
area reclaim.
62, 63 Poor: Unsuited: Unsuited:: . Fair:
Terry thin layer, thin layer. thin layer. small stones.
area reclaim.
64, 65 Poor: Unsuited Unsuited Good.
Thedalund thin layer.
66, 67 Poor: Unsuited Unsuited Fair:
Ulm shrink-swell, too clayey.
low strength.
68• Good Good Good Poor:
Ustic Torriorthents small stones,
too sandy.
69, 70 Good Fair Unsuited Poor:
Valent too sandy.
71t:
Valent Good Fair Unsuited Poor:
too sandy.
Loup Poor: Fair: Unsuited: Poor:
wetness. excess fines. excess fines. wetness.
72, 73, 74, 75, 76,
77 Fair: Poor: Unsuited Good.
Vona low strength. excess fines.
78, 79, 80 Fair: Unsuited Unsuited Fair:
Weld low strength, too clayey.
shrink-swell,
frost action.
81* 82+, 83•:
Wiley Fair: Unsuited Unsuited Fair:
low strength, too clayey.
shrink-swell.
Colby Fair: Unsuited Unsuited Good.
low strength.
See map unit description for the composition and behavior of the map unit.
A
WELD COUNTY, COLORADO, SOUTHERN PART 111
TABLE 9.--WATER MANAGEMENT
, � a of the terms used in this table to describe restrictive soil features are defined in the Glossary. Absence
of an entry means soil was not evaluated]
Soil name and Pond ! Embankments, Drainage Irrigation Terraces Grassed
map symbol reservoir i dikes, and and waterways
areas levees diversions y
1 , 2 Seepage Thin layer Favorable Favorable Rooting depth Rooting depth.
Altvan
3':
Aquolls Floods, Floods, Wetness Wetness.
poor outlets. wetness.
Aquents Floods, Floods, Wetness Wetness.
poor outlets. wetness.
4a:
Aquolls Floods, Floods, Wetness Wetness.
poor outlets. wetness.
Aquepts Floods, Floods, Wetness Wetness.
poor outlets. wetness.
5 Seepage, Piping, Slope Slope, Erodes easily, Erodes easily.
Ascalon slope. low strength. erodes easily, piping.
6 Seepage, Piping, Slope Slope, Erodes easily, Erodes easily,
Ascalon slope. low strength. erodes easily. piping. slope.
7 Seepage, Piping, Slope Slope, Erodes easily, Erodes easily,
Ascalon slope. low strength, erodes easily. piping, slope.
slope.
8 Seepage, Piping, Favorable Favorable Erodes easily, Erodes easily.
Ion slope. low strength. piping.
9 Seepage, Piping, Slope Slope, Erodes easily, Erodes easily.
Ascalon slope. low strength. erodes easily, piping.
10 Seepage Piping, Cutbanks cave, Droughty, Erodes easily, Droughty,
Bankard seepage, floods, floods, piping, erodes easily.
erodes easily. poor outlets. seepage.
11 Seepage Favorable Favorable Droughty Erodes easily, Erodes easily.
Bresser I piping.
12 I Seepage, Favorable Slope Slope, Erodes easily, Erodes easily.
Bresser , slope. erodes easily. piping,
13 Seepage, Seepage Slope Slope, Complex slope, Droughty,
Cascajo slope. droughty. piping, slope.
too sandy.
14 Seepage Low strength, Favorable Favorable Favorable Favorable.
Colby piping.
15 Seepage Low strength, Favorable Favorable Favorable Slope,
Colby ' piping.
erodes easily.
16, 17 Seepage Low strength, Slope Slope, Favorable Slope,
Colby piping, erodes easily. erodes easily.
18':
Colby Seepage Low strength, Slope Slope, Favorable Slope,
piping. erodes easily. erodes easily.
Adena Slope, Low strength, Slope, Slope, ;Slope, Slope,
seepage. piping. percs slowly. percs slowly. ; piping. percs slowly.
19
'Seepage Low strength, Floods Favorable ,'Erodes easily Erodes easily.
9"�mbo
compressible.
See footnote at end of table.
114 SOIL SURVEY
TABLE 9.--WATER MANAGEMENT--Continued
Soil name and Pond Embankments, Drainage Irrigation Terraces Grassed
map symbol reservoir dikes, and i i and waterways
areas levees i diversions
63 Slope, Piping, Slope, Slope, Slope, Slope,
Terry depth to rock, thin layer. rooting depth. rooting depth, depth to rock, rooting depth,
_ seepage. soil blowing. soil blowing. soil blowing.
54 Depth to rock, Low strength, Slope, Slope, Depth to rock Rooting depth.
Thedalund slope. piping, depth to rock. rooting depth.
thin layer.
65 Depth to rock, Low strength, Slope, Slope, Depth to rock Slope,
Thedalund slope. piping, depth to rock. rooting depth. rooting depth.
thin layer.
66 Favorable Low strength, Favorable Peres slowly, Peres slowly--- Erodes easily.
Ulm shrink-swell, erodes easily. A
compressible.
57 Slope Low strength, Slope Slope, Peres slowly--- Erodes easily.
Ulm shrink-swell, percs slowly,
compressible. erodes easily.
68* Seepage, Seepage Slope Slope, Too sandy, Droughty,
Ustic slope. droughty. slope. slope.
Torriorthents
69 Seepage, Piping, Slope Slope, Erodes easily, Erodes easily.
'talent slope. seepage. erodes easily, piping.
droughty.
70 Seepage, Piping, Slope Slope, Erodes easily, Slope,
Valent slope. seepage. erodes easily, piping. erodes easily.
droughty.
71*:
Valent Seepage, Piping, Slope Slope, Erodes easily, Slope,
slope. seepage. erodes easily, piping. erodes easily.
droughty.
Loup Seepage Seepage, Poor outlets, Wetness, Not needed Not needed.
piping. cutbanks cave. seepage.
72, 73 Seepage, Piping, Slope Slope, Piping, Erodes easily.
Vona slope. erodes easily, fast intake, erodes easily.
seepage. seepage.
74 Seepage, Piping, Slope Slope, Piping, Slope,
Vona slope. erodes easily, fast intake, erodes easily. erodes easily.
seepage. seepage.
75 Seepage, Piping, Favorable Fast intake, Piping, Erodes easily.
Vona slope. erodes easily, seepage. erodes easily.
seepage.
76, 77 Seepage, Piping, Slope Slope, Piping, Erodes easily.
Vona slope. erodes easily, fast intake, erodes easily.
seepage. seepage.
75 Seepage Low strength--- Percs slowly--- Peres slowly, Piping, Peres slowly.
Weld slow intake. percs slowly.
,
79, 80 Seepage Low strength---IS1ope, Slope, Piping, Percs slowly.
Weld ; percs slowly. percs slowly, percs slowly.
slow intake.
81*:
Wiley Slope, Piping, Peres slowly--- Favorable Piping Erodes easily.
seepage. low strength.
Colby Seepage Low strength, Favorable Favorable . Favorable Favorable.
piping.
See footnote at end of table.
v. r
116 SOIL SURVEY
TABLE 10.--RECREATIONAL DEVELOPMENT
[Some of the terms used in this table to describe restrictive soil features are defined in the Glossary. See
text for definitions of "slight," "moderate," and "severe." Absence of an entry means soil was not
rated]
Soil name and Camp areas Picnic areas Playgrounds Paths and trails
map symbol
1 Slight Slight Slight Slight.
Altvan '
2 Slight Slight Moderate: Slight.
Altvan slope.
3*. •
Aquolls Severe: Severe: Severe: Severe:
wetness, wetness, wetness, wetness,
floods. floods. floods. floods.
Aquents Severe: Severe: Severe: Severe:
wetness, wetness, wetness, wetness,
floods. floods. floods. floods.
4.:
Aquolls Severe: Severe: Severe: Severe:
wetness, wetness, wetness, wetness,
floods. floods. floods. floods.
Aquepts Severe: Severe: Severe: Severe:
wetness, wetness, wetness, wetness,
floods. floods. floods. floods.
5, 6 Slight Slight Moderate: . Slight.
Ascalon slope.
7 Slight Slight Severe: Slight.
Ascalon slope.
8 Slight Slight ;Slight Slight.
Ascalon
9 Slight Slight ;Moderate: Slight.
Ascalon : slope.
10 Severe: Moderate: ;Severe: Slight.
Bankard floods. floods, floods.
too sandy.
11 Slight Slight Slight Slight.
Bresser
12 Slight Slight Moderate: Slight.
Bresser . slope.
13 Moderate: Moderate: ;Severe: Moderate:
Cascajo slope, slope, ; slope, small stones.
small stones. small stones. ; small stones.
14 Moderate: Moderate: ;Moderate: Moderate:
Colby dusty. dusty. ; dusty. dusty.
15, 16 Moderate: Moderate: Moderate: Moderate:
Colby dusty. dusty. slope, dusty.
dusty.
17 Moderate: Moderate: Severe: Moderate:
Colby dusty. dusty. slope. dusty.
18':
Colby Moderate: Moderate: Severe: ',Moderate:
dusty. dusty. slope. ; dusty.
See footnote at end of table.
WELD COUNTY, COLORADO, SOUTHERN PART 119
TABLE 10.--RECREATIONAL DEVELOPMENT--Continued
Soil name and Camp areas Picnic areas Playgrounds Paths and trails
map symbol
60*:
Renohill Moderate: Moderate: Severe: Moderate:
percs slowly, too clayey. slope. too clayey.
too clayey.
51 Moderate: Moderate: Severe: Slight.
Tassel slope. slope. depth to rock,
slope.
52 .Moderate: Moderate: Moderate: Moderate:
Terry dusty. dusty. dusty, dusty.
depth to rock. N
53 Moderate: Moderate: Severe: Moderate:
Terry dusty, dusty. slope, dusty.
64 ;Moderate: Moderate: Moderate: Slight.
Thedalund ; dusty. dusty. slope,
depth to rock,
dusty.
55 ;Moderate: Moderate: Severe: Slight.
Thedalund ; dusty. dusty. slope.
55 Moderate: Moderate: Moderate: Moderate::
Ulm percs slowly, too clayey.Y Y percs slowly. too clayey.
too clayey.
57 Moderate: Moderate: Moderate: Moderate:
Ulan percs slowly,
too clayey. percs
slowly,
too clayey.
too clayey,
slope.
53* Severe: Severe: Severe: Severe:
Ustic Torriorthents small stones, small stones, slope, small stones,
too sandy, too sandy. small stones, too sandy.
too sandy.
59 Moderate: Moderate: Severe: Severe:
Valent too sandy, too sandy, too sandy. too sandy.
dusty. dusty.
70 Moderate: Moderate: Severe: Severe:
Valent too sandy, too sandy, too sandy, too sandy.
dusty. dusty. slope.
77•:
Valent Moderate: Moderate: Severe: Severe:
too sandy, too sandy, too sandy, too sandy.
dusty, dusty. slope.
Loup Severe: Severe: Severe: Severe:
wetness, wetness. wetness. wetness.
floods.
72 Moderate: moderate: Moderate: Moderate:
Vona too sandy, too sandy, too sandy, too sandy,
dusty. dusty. dusty.` dusty.
73 Moderate: Moderate: Moderate: Moderate:
Vona I too sandy, too sandy, too sandy, too sandy,
dusty. dusty. , slope, dusty.
I dusty.
74 Moderate: Moderate: ;Severe: Moderate:
Vona too sandy, too sandy, I slope. too sandy,
dusty. dusty. dusty.
See footnote at end of table.
120 SOIL SURVEY
TABLE 10.--RECREATIONAL DEVELOPMENT--Continued
—r
Soil name and Camp areas Picnic areas Playgrounds Paths and trails
map symbol
75 Moderate: Moderate: Moderate: Moderate:
Vona dusty. dusty. dusty. dusty.
76, 77 Moderate: Moderate: Moderate: Moderate:
Vona dusty. dusty. slope, dusty.
dusty.
78 Moderate: Slight Moderate: Slight.
Weld percs slowly. percs slowly.
79, 80 Moderate: Slight Moderate: Slight.
Weld percs slowly. percs slowly,
slope.
4
81•:
Wiley Moderate: Moderate: Moderate: Moderate:
dusty. dusty. dusty. dusty.
Colby Moderate: Moderate: Moderate: Moderate:
dusty. dusty. dusty. dusty. ,
82f 83*:
Wiley Moderate: Moderate: ',Moderate: Moderate:
dusty. dusty. : dusty, dusty.
slope.
Colby Moderate: Moderate: Moderate: Moderate:
dusty. dusty. : slope, i dusty.
dusty.
* See map unit description for the composition and behavior of the map unit.
!
11 0
WELD COUNTY, COLORADO, SOUTHERN PART 121
TABLE 11.--WILDLIFE HABITAT POTENTIALS
_-
,e text for definitions of "good," "fair," "poor," and "very poor." Absence of an entry indicates the soil
was not rated]
Potential for habitat elements Potential as habitat for::
Soil name and i Wild
map symbol Grain I Grasses herba- Shrubs Wetland Shallow Openland Wetland Rangeland
and seed : and ceous plants water wildlife wildlife wildlife
crops** : legumes plants , areas
1 , 2 Good Good Fair Fair Poor Very poor Good Very poor Fair.
Altvan
3*:
Aquolls Poor Poor Good Fair Good Good Fair ,Good Fair.
Aquents Poor Poor Good Fair Good Good Fair (Good Fair.
4a:
Aquolls Poor Poor Good Poor Good Good Fair :Good Fair.
Aquepts Poor Poor Good Poor Good Good Fair ;Good Fair.
5, 6 Good Good Fair Fair Poor Very poor Good :Very poor Fair.
Ascalon
7 Fair Good Fair Fair Poor Very poor Fair Very poor Fair.
Ascalon
8, 9 Good Good Fair Fair Poor Very poor Good Very poor Fair.
Ascalon
10 Poor Fair Fair Fair Poor Very poor Fair Very poor,Fair.
Bankard
_11 , 12 Good Good Fair Fair Poor Very poor Good Very poor Fair.
3resser
i3 Very poor Very poor Fair Fair Very poor Very poor Poor Very poor Fair.
Ca sc ajo
14, 15 Good Good Fair :Fair Poor Very poor Good Very poor Fair.
Colby
16, 17 Fair Good Fair :Fair Poor Very poor Fair Very poor Fair.
Colby
18*:
Colby Fair Good Fair :Fair Poor Very poor Fair Very poor:Fair.
Adena Fair Good Fair :Fair Poor Very poor Fair Very poorlFair .
19, 20 Good Good Fair Fair Poor Very poor Good Very poorlFair.
Colombo
21 , 22 Good Good Fair Fair Poor Very poor Good Very poor:Fair.
Dacono
23, 24 Good Good Fair Fair Poor Very poor Good Very poorlFair.
Fort Collins
25, 26 Good Good Fair Fair Poor Very poor Good ,Very poor Fair.
Haverson
27 Fair Fair Poor Poor Poor Poor Fair Poor Poor.
Heldt
28 Fair Fair Poor Poor Poor Very poor Fair Very poor Poor.
Heldt
29 Good Good Fair Fair Poor Very poor Good Very poor Fair.
Julesburg
30 Good Good Fair Fair Poor Very poor Good :Very poor Fair .
Julesburg
See footnotes at end of table.
WELD COUNTY, COLORADO, SOUTHERN PART 123
TABLE 11.--WILDLIFE HABITAT POTENTIALS--Continued
Potential for habitat elements r Potential as habitat for--__
Soil name and Wild --r—
map symbol Grain Grasses herba- Shrubs Wetland Shallow :0penland Wetland Rangeland
and seed and ceous plants water ;wildlife wildlife wildlife
crops** legumes plants areas
68* Very poor Very poor Poor Poor Very poor Very poor Very poor Very poor Poor.
Ustic
Torriorthents
69, 70 Poor Fair Fair Fair Very poor Very poor Fair Very poor Fair.
Valent
71*:
Valent Poor -Fair Fair Fair Very poor Very poor Fair Very poor;Fair.
Loup Poor Fair Good Fair Good Good Fair Good Fair .
72, 73 Fair Good Fair Fair Poor Very poor Fair Very pomr Fair.
Vona
74 Poor Good Fair Fair Very poor Very poor Fair Very poor Fair.
Vona
75, 76 Good Good Fair Fair Poor Very poor Good Very poor Fain.
Vona
•
77 Fair Good Fair Fair Very poor Very poor Fair Very poor Fair.
Vona
78, 79 Good Good ;Fair Poor Poor Very poor Good Very poor Poor.
Weld
80 Fair Good ;Fair Poor Poor Very poor Fair Very poor Poor.
Weld
--81+ 82":
liley Good Good ;Fair Fair Poor Very poor Good Very poor Poor.
Colby Good Good ,Fair Fair Poor Very poor Good Very poor Fair.
83":
Wiley Fair Good ;Fair Fair Poor Very poor Fair Very poor Fair.
Colby Fair Good ;Fair Fair Poor Very poor Fair ',Very poor Fair.
* See map unit description for the composition and behavior of the map unit.
"' Potential for grain and seed crops, grasses and legumes, and for openland wildlife based on irrigated
land use.
124 SOIL SURVEY
TABLE 12.--ENGINEERING PROPERTIES AND CLASSIFICATIONS
[The symbol < means less than; > means greater than. Absence of an entry means data were not estimated]
Soil name and Depth: USDA texture Classification Frag- Percentage passing
map symbol ments sieve number-- Liquid Plas-
Unified AASHTO > 3
-- limit ticity
In inches nc 4 10 40 200 index
Pct
1, 2 0-101Loam CL-ML A-4 0 90-100 85-100 60-95 ;50-75 20-30 5-10
Altvan 10-25;Clay loam, loam CL A-6, A_7 95-100
0
25-50;Sand and gravel SP, SP-SM A-10 75-95 70-900 25-3585-100,70-180 35-50- 15-25
3*. NP
Aquolls 0-48;Variable ___ ---
48-50:Sand, gravelly SP, SP-SM,A-1 0-10 60-90
sand. 50-70 30-50 0-10 --- NP
Aquents 0-48 Variable ___ ___ ___
48-60 Sand and gravel SP, SP-SM;A-1 0-10 60-90 50-70
4*: 30-50 0-10 --- NP
Aquolls 0-60 Variable ___
Aque -
uepts --- � --- ---
Q P 0-60 Variable _
5, 6, 7 0-8 Sandy loam SM �
IA-2, A-4 --- --- ___ ___ ___ ___ ___
Ascalon 8-18 Sandy clay loam SC, CL ;A-6 0 95-100 90-100 70-95 25-50 15-25 NP-5
0 95-100 90-100 80-100 40-55 20-40 10-20
18-60 Sandy loam, SC, IA-4, A-6 0
95-100 95-100 75-95 35-65 20-40 5-LS
sandy clay SM-SC,
loam, fine CL,
sandy loam. CL-ML
8, 9 0-8 Loam SM Ascalon 8-18 Sandy clay loam SC, CL IA-6 A-4 0 0 95-100 90-100 70-95 25-50 15-25 NP-5
95-100 90-100 80-100 40-55 20-40 10-20
18-60 Sandy loam, SC, IA-4,
A-6 0 95-100 95-100 75-95 35-65 20-40 5-15
sandy clay SM-SC,
loam, fine CL,
sandy loam. CL-ML
10 0-4 Sandy loam SM A-2, A-4
Bankard 4-50 Fine sand, sand, SP-SM, SM A-2, 0 95-100 60-100 60-70 30-40 --- NP
gravelly sand. A , 0-5 70-100 60-100 40-70 5-25 --- NP
3,
A-1
11 , 12 0-16,Sandy loam SM A-1 ,
A-2 0 95-100 75-100 35-50 20-35 15-25 N0-5
Dresser 16-2515andy clay loam SC A-2
95-too 75-100 50-70 30-50 30-55 10-25
A-6,
25-30;Sandy loam, SC, SM-SC A-2, A-1 0
90-100 60-100 30-60 ;20-30 25-35 5-15; coarse sandy
loam, sravelly
sandy loam.
.30-60;Loamy coarse SP-SC A-2, A-1 0-5 80-100 35-85 20-50 5-10 20- 0 3 5-10 sand, gravelly
loamy sand,
very gravelly
loamy sand.
13 0-9 Gravelly sand ;GM
Cascajo loam. y Y A-7 , A-2 0-15 50-65 50-60 15-40 10-35 --- NP
9-31 Very gravelly ;OP-GM, A-1 0-15 15-50 15-50 5-30 0-20 --- NP
sandy loam, ; GP, GM
very gravelly
loamy sand,
very gravelly
sand.
31-60 Very gravelly GP, SP, ;A-t 0-15 10-60 10-60 5-30 0-10 --- NP
loamy sand, GP-GM,
very gravelly SP-SM
sand, gravelly
sand.
See footnote at end of table.
•
WELD COUNTY, COLORADO, SOUTHERN PART 127
TABLE 12.--ENGINEERING PROPERTIES AND CLASSIFICATIONS--Continued
Classification Frag- Percentage passing
Soil name and Depth USDA texture ' ments sieve number-- Liquid Plas-
map symbol Unified AASHTO > 3 limit ticity
inches 4 10 40 200 index
In Pct Pct
56, 57 0-9 Clay loam CL A-6 0 85-100;80-100 80-95 70-80 25-40 10-20
Renohill 9-32 Clay, clay loam CL, CH A-7, A-6 0 95-100:90-100 90-100 75-95 35-65 20-35
32 Weathered --- --- ___ ___ ; ___ ___
bedrock.
58, 59 0-6 Loam CL-ML A-4 0-5 75-100 75-100 70-95 55-75 25-35 5-10
Shingle 6-18 Clay loam, loam CL A-6 0 75-100 75-100 65-100 50-80 30-40 10-20
18 Unweathered --- --- --- --- --- --- --- -__
bedrock.
60*:
Shingle 0-6 Loam CL-ML A-4 0-5 75-100 75-100 70-95 55-75 25-35 5-10
6-18 Clay loam, loam CL A-6 0 75-100 75-100 65-100 50-80 `30-40 10-20
18 Unweathered --- --- --- --- --- --- --- --- ---
bedrock.
Renohill 0-9 Clay loam CL A-6 0 85-100 80-100 80-95 70-80 25-40 10-20
9-32 Clay, clay loam CL, CH A-7, A-6 0 95-100 90-100 90-100 75-95 35-65 20-35
32 Weathered --- --- --- --- --- --- ---
bedrock.
61 0-11 Fine sandy loam ML, SM A-4 0 95-100 90-100 70-95 40-65 20-35 NP-5
Tassel 111 ,Unweathered --- --- --- --- --- --- --- --- ---
bedrock.
62, 63 ; 0-6 Fine sandy loam SM, ML A-2, A-4 0-5 75-100 75-100 70-90 30-60 --- NP
Terry 1 6-18 Fine sandy loam, SM, ML A-4 0 75-100 75-100 70-85 40-60 --- NP
sandy loam.
; 18-37 Fine sandy loam, SM A-2, A-4 0-5 75-100 75-100 70-85 25-50 --- NP
sandy loam,
loamy fine
sand.
37 Weathered --- ___ ___ ___ ___ ___ ___ --_ ---
bedrock.
64, 65 0-8 Loam CL-ML A-4 0-5 80-100 75-100 70-95 50-75 20-30 5-10
Thedalund
8-25 Clay loam, loam, CL-ML, A-6, A-4 0-5 80-100 75-100 70-95 40-80 25-35 5-15
very fine sandy CL,
loam. SM-SC,
SC
25 Weathered --- --- --- ___ ___ ___ ___ ___ ---
bedrock.
66, 67 0-5 Clay loam CL A-6 0-5 95-100;95-100 80-100 70-80 30-40 10-15
Ulm 5-19 Clay loam, clay CL A-6, A-7 0-5 75-100;75-100 75-100 60-80 35-45 20-30
19-60 Clay loam CL A-6 0-5 75-100;75-100 75-100 60-80 30-40 15-20
68* 0-60 Variable --- --- --- --- --- --- --- --- ---
Ustic
Torriorthents
69, 70 0-8 Fine sand ;SM A-? 0 100 : 100 80-95 10-30 --- NP
Valent 8-60 Fine sand , sand SP-SM, SM A-2, A-3 0 100 195-100 75-90 5-20 --- NP
71*:
Valent 0-8 Fine sand SM, A-2 0 100 1 100 80-95 10-30 --- NP
8-60 Fine sand, sand SP-SM, SM A-2, A-3 0 100 ;95-100 75-90 5-20 --- NP
Loup 0-16 Loamy sand 3M IA-2 0 100 100 50-100 15-30 --- NP
16-60 Fine sand , loamy SP-SM, SM:A-2, A-3 0 100 ; 100 ;65-100 5-20 --- NP
sand, sand.
See footnote at end of table.
128 SOIL SURVEY
TABLE 12.--ENGINEERING PROPERTIES AND CLASSIFICATIONS--Continued
Classification Frag- I Percentage passing Soil name and Depth; USDA texture ments sieve number--
map symbol Unified AASHTO > 3 Liquid I ticity 4 10 40 limit ;
In Pct _200 index
Pct—T
72, 73, 74 0-6 ;Loamy sand SM A-2 0 100 90-100 60-90 15-30 --- NP
Vona 6-28IFine sandy loam, SM A-2, A-4 0 100 90-100 60-90 30-45 --- NP
sandy loam.
28-60:Sandy loam, SM A-2 0 100 90-100 50-85 15-30 --- NP
loamy sand.
75, 76, 77 0-6 ;Sandy loam SM A-2, A-4 0 100 90-100 60-90 30-45 --- NP
Vona , 6-281Eine sandy loam, SM A-2, A-4 0 100 90-100 60-90. 30-45 --- NP
I sandy loam.
28-60ISandy loam, SM A-2 0 100 90-100;50-85 15-30 --- NP
loamy sand.
78, 79, 80 0-8 Loam ML, A-4 0 100 95-100;85-100 60-85 20-30 NP-10
Weld CL-ML
8-15 Silty clay loam, CL A-6, A-7 0 100 100 ;95-100 85-95 35-50 15-30
silty clay.
15-60 Silt loam, loam CL-ML, CL A-4, A-6 0 100 95-100;85-100 60-85 20-35 5-15
81*, 82*, 83*:
Wiley 0-11 Silt loam 'CL-ML, CL A-4, A-6 0 100 100 ;90-100 70-90 25-35 5-15
11-60 Silty clay loam, CL A-6 0 100 100 :90-100 70-95 25-35 10-20
silt loam.
Colby 0-7 Loam CL-ML A-4 0 100 100 ;90-100 85-100 25-30 , 5-10
7-60 Silt loam, loam CL-ML A-4 0 100 100 ;90-100 85-100 25-30 5-10
* See map unit description for the composition and behavior of the map unit.
♦ A
WELD COUNTY, COLORADO, SOUTHERN PART 129
TABLE 13.--PHYSICAL AND CHEMICAL PROPERTIES OF SOILS
--
he symbol < means less than; > means greater then. The erosion tolerance factor (T) is for the entire
profile. Absence of an entry means data were not available or were not estimated]
Risk of corrosion Erosion Wind
Soil name and Depth Permea- Available Soil Salinity Shrink- factors erodi-
map symbol bility water reaction swell Uncoated Concrete bility
capacity potential steel K T group_
In In/hr In/in �H Mmhos/cm
1, 2 0-10 0.6-2.0 0.20-0.24 6.6-7.8 --- Low Moderate Low 0.24 3 5
Altvan 10-25 0.6-2.0 0.15-0.17 7.4-8.4 <2 Moderate Moderate Low 0.28
25-60 >20 0.02-0.04 7.4-9.0 <2 Low Moderate Low 0.10
3*:
Aquolls 0-48 g
48-60 >20 0.04-0.06 7.4-8.4 2-16 Low High Moderate ---
Aquents 0-48 --- --- ___ ___ •.
48-60 >20 0.04-0.06 7.4-8.4 2-16 Low High Moderate ---
4*:
Aquolls 0-60
Aquepts 0-60 --_ ___ ___ ___
5, 6, 7, 8, 9 0-8 0.6-6.0 0.71-0.16 6.6-7.8 <2 Low Low Low ;0. 17 5 3
Ascalon 8-18 0.6-2.0 0.13-0.15 6.6-7.8 <2 ;Moderate Moderate Low ;0.24
18-60 0.6-6.0 0.11-0. 15 7.9-8.4 <2 ;Low Moderate Low 0.24
10 0-4 2.0-6.0 0.09-0.12 7.4-8.4 <2 Low Moderate Low 0. 10 5 3
Bankard 4-60 6.0-20 0.05-0.08 7.4-8.4 <2 Low Moderate Low 0. 10
11 , 12 0-16 0.6-6.0 0.11-0.13 6.1-7.3 --- Low Low Low 0.10 5 2
Bresser 16-25 0.6-2.0 0.15-0. 18 6.6-7.3 --- Low Moderate Low 0. 15
25-30 0.6-6.0 0.10-0.13 6.6-7.3 --- Low Low Low ,0.10
30-60 2.0-20 0.05-0.08 6.6-7.3 --- Low Low Low :0. 10
0-9 2.0-6.0 0.07-0.09 7.4-8.4 <2 Low Moderate Low ;0. 10 5 9
Cascajo 9-31 6.0-20 0.05-0.08 7.4-8.4 <2 Low Moderate Low 10. 10
31-60 6.0-20 0.05-0.06 7.4-8.4 <2 Low Moderate Low 10. 10
14, 15, 16, 17 0-7 0.6-2.0 0.20-0.24 6.6-8.4 <2 Low Moderate Low 11.37 5 4L
Colby 7-60 0.6-2.0 0.17-0.22 7.4-8.4 <2 Low Moderate Low 0.37
18':
Colby 0-7 0.6-2.0 0.20-0.24 6.6-8.4 <2 Low Moderate Low 0.37 5 4L
7-60 0.6-2.0 0.17-0.22 7.4-8.4 <2 Low Moderate Low 0.37
Adena 0-6 0.6-2.0 0.18-0.21 6.6-7.8 <2 Low Moderate Low 0.37 5 5
6-9 0.06-0.2 0.16-0.18 6.6-7.8 i <2 High High Low 3.24
9-60 0.6-2.0 0.16-0.18 7.4-8.4 <2 Low High Low 0.32
19, 20 0-14 0.6-2.0 0.14-0.18 7.4-8.4 <2 Low High Low 0.32 5 5
Colombo 14-21 0.6-2.0 0.14-0. 16 7.4-8.4 <2 Moderate High Low 0.28
21-60 0.6-2.0 0.14-0.16 7.4-8.4 <2 Low High Low 0.28
21 , 22 0-12 0.2-0.6 0.19-0.21 6.6-7.8 <2 Moderate Moderate Low 0.24 3 ; 5
Dacono 12-21 0.2-0.6 0.15-0.21 7.4-8.4 <2 High High Low 0.24
21-27 0.2-2.0 0.13-0.18 7.4-8.4 <2 Moderate High Low ,0.15
27-60 >20 0.03-0.05 7.4-8.4 <2 Low High Low 10. 10
23, 24 0-7 0.6-2.0 0.16-0.20 6.6-7.8 <2 Low Moderate Low ;0.20 5 5
Fort Collins 7-11 0.6-2.0 0.16-0.18 7.4-7.8 <2 Moderate Moderate Low 0.20
11-60 0.6-2.0 0.16-0.18 7.4-8.4 <2 Low High Low 0.20 `
25, 26 0-4 0.6-2.0 0. 14-0.18 6.6-8.4 <8 Low High Low 0.28 5 4L
Haverson 4-60 0.6-2.0 0.14-0.18 7.4-8.4 <8 Low High Low 0.23
27, 28 0-60 0.06-0.6 0.12-0.17 7.9-9.0 <8 High High High 0.29 5 4
Heldt
See footnote at end of table.
WELD COUNTY, COLORADO, SOUTHERN PART 131
TABLE 13.--PHYSICAL AND CHEMICAL PROPERTIES OF SOILS--Continued
Risk of corrosion Erosion Wind
Soil name and Depth Permea- Available Soil Salinity) Shrink- factors erodi-
map symbol bility water reaction 1 swell Uncoated ;Concrete -r— bility
capacity ;potential steel I K I group
In In/hr In/in pH Mmhos/cm
;
60*: ;
Renohill 0-9 0.2-0.6 0.17-0.21 6.6-7.8 <2 Moderate High Low 0.37- 3 6
9-32 0.06-0.2 0.14-0. 16 6.6-8.4 <2 High High Low 0.32
32 --- --- ---
61 --- ---
0-11 2.0-6.0 0.16-0.18 7.4-8.4 <2 Low High Low 0.24 1 3
Tassel 11 --- --- ---
62, 63 0-6 2.0-6.0 0.13-0.15 7.0-7.8 <2 Low Moderate Low 0.20 2 3
Terry 6-18 2.0-6.0 0.13-0.15 7.0-7.8 <2 Low Moderate Low 0.20
18-37 2.0-6.0 0.13-0.15 7.9-8.4 <2 Low High Low 0.20
37 --- --- --- --- :
64, 65 0-8 0.6-2.0 0.16-0.18 7.9-8.4 <2 Low High Low 0.32 2 4L
Thedalund 8-25 0.6-2.0 0.16-0. 18 7.9-8.4 <2 Low High Low 0.32
25 _-_ ___ ---
66,
67 0-5 0.6-2.0 0.16-0.18 6.6-7.8 --- Low High Low 0.32 5 6
Ulm 5-19 0.06-0.2 0.19-0.21 7.4-8.4 <2 High High Low 0.37 '
19-60 0.6-2.0 0.19-0.21 7.9-8.4 <2 Moderate High Low 0.37
68* 0-60 --- --- --- ---
Ustic
Torriorthents
69, 70 0-8 6.0-20 0.07-0.12 6.6-7.3 --- Low Low Low 0.10 5 1
Valent 8-60 6.0-20 0.05-0.10 6.6-7.8 <2 Low Low Low 0.10
71*:
Valent 0-8 6.0-20 0.07-0.12 6.6-7.3 --- Low Low Low 0.10 5 1
— 8-60 6.0-20 0.05-0. 10 6.6-7.8 <2 Low Low Low 0.10
Loup 0-16 6.0-20 0.10-0. 14 6.6-8.4 <2 Low High Low 0.17 5 2
16-60 6.0-20 0.06-0.08 7.4-8.4 <2 Low High Low 0.17
72, 73, 74 0-6 6.0-20 0.09-0.11 6.6-7.3 --- Low Low Low 0.10 5 2
Vona 6-28 2.0-6.0 0.12-0.14 6.6-8.4 <4 Low High Low 0.10
28-60 6.0-20 0.08-0.11 7.4-8.4 <4 Low High Low 0.10
75, 76, 77 0-6 2.0-6.0 0.11-0.13 6.6-7.3 --- Low Low Low 0.10 5 3
Vona 6-28 2.0-6.0 0.12-0. 14 6.6-8.4 <4 Low High Low 0.10
28-60 6.0-20 0.08-0.11 7.4-8.4 <4 Low High Low 0.10
75, 79, 80 0-8 0.6-2.0 0.16-0.21 6.6-7.3 <2 Low Low Low 0.32 5 6
Weld 8-15 0.06-0.2 0.19-0.21 6.6-7.8 <2 High Moderate Low 0.28
15-60 0.6-2.0 0.16-0.21 7.4-8.4 <2 Low High Low 0.28
81*, 82*, 83*:
Wiley 0-11 0.6-2.0 ;0. 19-0.21 7.4-7.8 <2 Low High Low 0.37 5 4L
11-60 0.6-2.0 ;0.19-0.21 7.9-8.4 <2 Moderate High Low 0.37
Colby 0-7 0.6-2.0 0.20-0.24 6.6-8.4 <2 Low Moderate Low 0.37 5 4L
7-60 0.6-2.0 ;0. 17-0.22 7.4-8.4 <2 Low Moderate Low 0.37
* See map unit description for the composition and behavior of the map unit.
132 SOIL SURVEY
TABLE 14.--SOIL AND WATER FEATURES
[Absence of an entry indicates the feature is not a concern. See text for descriptions of symbols and such
terms as "rare," "brief," and "perched." The symbol < means less than; > means greater than]
Flooding High water table Bedrock
Soil name and Hydro-; Potential
map symbol logic; Frequency Duration Months Depth Kind Months Depth Hard- frost
group ; ness action
Ft In
1 , 2 B None --- --- >6.0 --- --- >60 --- Moderate.
Altvan
3*:
Aquolls D ;Frequent---- Brief Apr-Jun 0.5-1.0 Apparent Apr-Jun >60 --- High.
Aquents D Frequent---- Brief Apr-Jun 0.5-1.0 Apparent Apr-Jun >60 --- High.
4*:
Aquolls D Frequent---- Brief Apr-Jun 0.5-1.5 Apparent Apr-Jun >60 High.
Aquepts D Frequent---- Brief Apr-Jun 0.5-1.5 Apparent Apr-Jun >60 --- High.
5, 6, 7, 8, 9 B None --- --- >6.0 --- --- >60 --- Moderate.
Ascalon
10 A Frequent---- Brief Mar-Jun >6.0 --- --- >60 --- Low.
Bankard
11 , 12 B None --- --- >6.0 --- --- >60 --- Moderate.
Bresser
13 A None --- --- >6.0 --- --- >60 --- Low.
Ca sc a jo
14, 15, 16, 17---- B None --- >6.0 --- --- >60 --- Low.
Colby
_ 1$*:
Colby B None --- --- >6.0 --- --- >60 --- Low.
Adena C None --- --- >6.0 --- --- >60 --- Low.
19, 20 B Rare --- --- >6.0 --- --- >60 --- Moderate.
Colombo
21 , 22 C None --- --- >6.0 --- --- >60 --- Low.
Dacono
23, 24 B None to rare --- --- >6.0 --- --- >60 --- Low.
Fort Collins
25, 26 B Rare to Brief May-Sep >6.0 --- --- >60 --- Low.
Haverson common.
27, 28 C None --- --- >6.0 --- --- >60 --- Low.
Heldt
29, 30 A None --- --- >6.0 --- --- >60 --- Moderate.
Julesburg
31 , 32, 33, 34---- B None --- --- >6.0 --- --- >60 --- Low.
Kim
35*:
Loup D Rare to ; Brief Mar-Jun +.5-1.5 Apparent Nov-May >60 --- Moderate.
common.
Boel A Occasional Brief Mar-Jun 1.5-3.5 Apparent Nov-May >60 --- Moderate.
36*:
Midway D None --- --- >6.0 --- --- 10-20 Rip- Low.
pable
See footnote at end of table.
I
t
T..
WELD COUNTY, COLORADO, SOUTHERN PART 133
TABLE 14.--SOIL AND WATER FEATURES--Continued
'-, Flooding High water table Bedrock
Soil name and Hydro- Potential
map symbol logic Frequency Duration Months Depth Kind 1 Months Depth Hard- frost
group ness action
Ft In
36•:
Shingle D None --- --- >6.0 --- --- 10-20 Rip- Low.
pable
37, 38 B None --- --- >6.0. --- --- 20-40 Rip- Low.
Nelson pable
39, 40, 41 , 42,
43 C None --- --- >6.0 --- --- >60 --- Moderate.
Nunn
44, 45, 46, 47,
48 B None --- --- >6.0 --- --- >60 --- Low.
Olney
49 A None --- --- >6.0 ^ --- --- >60 --- Low.
Osgood
50, 51 , 52, 53---- B None --- --- >6.0 --- --- >60 --- Low.
Otero
54, 55 B None to rare --- --- >6.0 --- --- >60 --- Moderate.
Paoli
56, 57 C None --- --- >6.0 --- --- 20-40 Rip- Low.
Renohill pable
58, 59 D None --- --- >6.0 --- --- 10-20 Rip- ,Low.
Shingle pable
60•:
--Shingle D None --- --- >6.0 --- --- 10-20 Rip- Low.
pable
Renohill C None --- --- >6.0 --- --- 20-40 Rip- Low.
pable
61 0 None --- --- >6.0 --- --- 10-20 Rip- Low.
Tassel pable
62, 63 B None --- --- >6.0 --- --- 20-40 Rip- Low.
Terry pable
64, 65 C None --- --- >6.0 --- --- 20-40 Rip- Low.
Thedalund pable
66, 67 C None --- >6.0 --- --- >60 --- Low.
Ulm
68* A None --- --- >6.0 --- --- >60 --- Low.
Ustic
Torriorthents
69, 70 A None --- >6.0 --- --- >60 --- Low.
Valent
71s:
Valent A None --- --- >6.0 --- --- >60 --- Low.
Loup D Rare to Brief Mar-Jun +.5-1 .5 Apparent:Nov-May >60 --- Moderate.
common.
72, 77, 74, 75,
76, --- >6.0 --- --- >60 --- Low.
77 B None ---
Vona
See footnote at end of table.
WELD COUNTY, COLORADO, SOUTHERN PART 135 •
TABLE 15.--CLASSIFICATION OF THE SOILS
Soil name Family or higher taxonomic class
Adena Fine-loamy, mixed, mesic Ustollic Paleargids
Altvan Fine-loamy over sandy or sandy-skeletal, mixed , mesic Aridic Argiustolls
Aquents Aquents
Aquepts Aquepts
Aquolls Aquolls
Ascalon Fine-loamy, mixed, mesic Aridic Argiustolls
Bankard Sandy, mixed, mesic Ustic Torrifluvents
Boel Sandy, mixed, mesic Fluvaquentic Haplustolls
Bresser Fine-loamy, mixed, mesic Aridic Argiustolls
Cascajo Sandy-skeletal, mixed, mesic Ustollic Calciorthids
Colby Fine-silty, mixed (calcareous) , mesic Ustic Torriorthents
Colombo Fine-Loamy, mixed, mesic Torrifluventic Haplustolls
Dacono Clayey over sandy or sandy-skeletal, montmorillonitic, mesic Aridic Argiustolls
Fort Collins ; Fine-loamy, mixed, mesic Ustollic Haplargids
Haverson Fine-loamy, mixed (calcareous) , mesic Ustic Torrifluvents
Heldt ; Fine, montmorillonitic, mesic Ustertic Camborthids
Julesburg I Coarse-loamy, mixed, mesic Aridic Argiustolls
Kim Fine-loamy, mixed (calcareous) , mesic Ustic Torriorthents
Loup Sandy, mixed, mesic Typic Haplaquolls
Midway Clayey, montmorillonitic (calcareous) , mesic , shallow Ustic Torriorthents
Nelson Coarse-loamy, mixed (calcareous) , mesic Ustic Torriorthents
Nunn Fine, montmorillonitic, mesic Aridic Argiustolls
Olney Fine-loamy, mixed, mesic Ustollic Haplargids
Osgood Loamy, mixed, mesic Arenic Ustollic Haplargids
Otero Coarse-loamy, mixed (calcareous) , mesic Ustic Torriorthents
Paoli Coarse-loamy, mixed, mesic Pachic Haplustolls
Renohill Fine, montmorillonitic, mesic Ustollic Haplargids
Shingle Loamy, mixed (calcareous) , mesic, shallow Ustic Torriorthents •
Tassel Loamy, mixed (calcareous) , mesic, shallow Ustic Torriorthents
Terry Coarse-loamy, mixed, mesic Ustollic Haplargids
Thedalund Fine-loamy, mixed (calcareous) , mesic Ustic Torriorthents
Ulm ; Fine, montmorillonitic, mesic Ustollic Haplargids
—�Jstic Torriorthents I Ustic Torriorthents
alent Mixed, mesic Ustic Torripsamments
/one ; Coarse-loamy, mixed, mesic Ustollic Haplargids
Weld ; Fine, montmorillonitic, mesic Aridic Paleustolls
Wiley Fine-silty, mixed, mesic Ustollic Haplargids
*U.S.GOVERNMENT PRINTING OFFICE 1980-251-606/27
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