HomeMy WebLinkAbout20021006.tiff EXHIBIT I
Soils Information . \
The following information was obtained from the Soil Survey x Weld County, Colorado. TE , . \
information was devel 9a 6tl United StDe@artmentofAgriculture, SoilCoates rva en
Service in coo am with the Colorado Agricultural Expe ent Station.
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EXHIBIT
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SOILS INFORMATION
HALL IRWIN CONSTRUCTION
FIRESTIEN PROPERTY
a
° __ TruttleApplegate,lnc. DATE 7/19/96 SCALE 1" =2000' +1-
F — ' = 11990 Grant ror treed, Suite W� JOB NO. 96-138
E == 11990 street, suite 555 DRAWN TPY
r-1 B kit,Colorado 80233 SHEET: 1 of 1
X (303)452-6 11 FAX(303)452-27$9 CF-IK'D PEA
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3—Aquolls and Aquents,gravelly substratum.This nearly level map unit is on bottom
lands and flood plains of all the major streams in the survey area.Aquolls,which have a dark
colored surface layer,make up about 60 percent of the unit.Aquents,which have a lighter
colored surface layer,make up about 35 percent.About 5 percent is Aquepts and Bankard
sandy loam.
These are deep,poorly drained soils that formed in recent alluvium.No one pedon is
typical. Commonly the soils have a mottled,mildly alkaline to moderately alkaline loamy or
clayey surface layer and underlying material and are underlain by sand or sand and gravel
within 48 inches.In places they have a gleyed layer in the underlying material.
Most of the acreage is subject to flooding.The water table is at or near the surface early in
spring and recedes to as deep as 48 inches late in fall in some years.
These soils are used for rangeland and wildlife habitat. Some small areas have been
reclaimed by major drainage and leveling and are used for irrigated crops.The potential
native vegetation is dominated by alkali sacaton,switchgrass,and western wheatgrass.
Saltgrass,sedge,rush,and alkali bluegrass are also prominent.Potential production ranges
from 3,000 pounds per acre in favorable years to 2,000 pounds in unfavorable years.As range
condition deteriorates,the switchgrass,alkali sacaton,and western wheatgrass decrease and
saltgrass,sedge,and rush increase.
Management of vegetation should be based on taking half and leaving half of the total
annual production.Seeding is difficult and costly because numerous tillage practices are
required to eliminate the saltgrass sod. Switchgrass,western wheatgrass, alkali sacaton,tall
wheatgrass,and tall fescue are suitable for seeding.They can be seeded into a clean,firm
seedbed. Seedbed preparation usually requires more than 1 year to eliminate the saltgrass sod.
A grass drill should be used. Seeding early in spring has proven most successful.
Wetland wildlife, especially waterfowl,utilize this unit. The wetland plants provide
nesting and protective cover,as well as some food.The nearby irrigated cropland,where
wildlife obtain much of their food and find protective cover,makes this unit valuable to both
wetland and openland wildlife.
Openland wildlife,especially pheasant,use this unit for cover and nesting.Deer find
excellent cover in some areas.
These valuable wildlife areas should be protected from fire and fenced to prevent
encroachment and overuse by livestock.They should not be drained.
These soils have good potential as a source of sand and gravel.Capability subclass VIw;
Salt Meadow range site.
32—Kim loam, 1 to 3 percent slopes.This is a deep,well drained soil on smooth plains
and alluvial fans at elevations of 4,900 to 5250 feet.It formed in mixed eolian deposit and
parent sediment from a wide variety of bedrock. Included in mapping are small areas of soils
that have loamy sand underlying material.
Typically the surface layer is brown and pale brown loam about 12 inches thick.The
upper 28 inches of the underlying material is pale brown loam.The lower part to a depth of
60 inches is pale brown fine sandy loam.
Permeability is moderate.Available water capacity is high.The effective rooting depth is
60 inches or more.Surface runoff is medium,and the erosion hazard is low.
In irrigated areas this soil is suited to all crops commonly grown in the area,including
corn,sugar beets,beans,alfalfa,small grain,potatoes,and onions.An example of a suitable
cropping system is 3 to 4 years of alfalfa followed by corn,corn for silage,sugar beets,small
grain,or beans. Land leveling,ditch lining(fig.6),and installing pipelines may be needed for
proper water applications.
All methods of irrigation are suitable,but furrow irrigation is the most common.Barnyard
manure and commercial fertilizer are needed for top yields.
In nonirrigated areas this soil is suited to winter wheat,barley,and sorghum.Most of the
acreage is planted to winter wheat and is summer fallowed in alternate years to allow
moisture accumulation.Generally precipitation is too low for beneficial use of fertilizer.
Stubble mulch farming, striperopping,and minimum tillage are needed to control soil
blowing and water erosion.Terracing also may be needed to control water erosion.
The potential native vegetation is dominated by blue grama. Several mid grasses,such as
western wheatgrass and needleandthread,are also present.Potential production ranges from
1,600 pounds per acre in favorable years to 1,000 pounds in unfavorable years.As range
condition deteriorates,the mid grasses decrease;blue grama,buffalograss,snakeweed,yucca,
and fringed sage increase;and forage production drops.Undesirable weeds and annuals
invade the site as range condition becomes poorer.
Management of vegetation on this soil should be based on taking half and leaving half of
the total annual production. Seeding is desirable if the range is in poor condition. Sideoats
grama, little bluestem,western wheatgrass,blue grama,pubescent wheatgrass,and crested
wheatgrass are suitable for seeding. The grass selected should meet the seasonal requirements
of livestock.It can be seeded into a clean,firm sorghum stubble,or it can be drilled into a
firm prepared seedbed.Seeding early in spring has proven most successful.
Windbreaks and environmental plantings of trees and shrubs commonly grown in the area
are generally well suited to this soil.Cultivation to control competing vegetation should be
continued for as many years as possible following planting.Trees that are best suited and
have good survival are Rocky Mountain juniper,eastern redcedar,ponderosa pine, Siberian
elm,Russian-olive,and hackberry.The shrubs best suited are skunkbush sumac, lilac,
Siberian peashrub,and American plum.
Wildlife is an important secondary use of this soil.The cropland areas provide favorable
habitat for ring-necked pheasant and mourning dove.Many nongame species can be attracted
by establishing areas for nesting and escape cover. For pheasants,undisturbed nesting cover
is essential and should be included in plans for habitat development,especially in areas of
intensive agriculture.Rangeland wildlife,for example,the pronghorn antelope,can be
attracted by developing livestock watering facilities,managing livestock grazing,and
reseeding where needed.
This soil has good potential for urban and recreational development. Increased population
growth in the survey area has resulted in increased homesite construction. The chief limiting
soil feature for urban development and road construction is the limited capacity of this soil to •
support a load. Septic tank absorption fields function properly,but community sewage
systems should be provided if the population density increases.Because of the permeability
of the substratum,sewage lagoons must be sealed.Lawns,shrubs,and trees grow well.
Capability subclass IIe irrigated,IVe nonirrigated;Loamy Plains range site.
52—Otero sandy loam,3 to 5 percent slopes.This is a deep,well drained soil on plains
at elevations of 4,700 to 5,250 feet.It formed in mixed outwash and eolian deposits.Included
in mapping are small areas of soils that have loam and clay loam underlying material.Also
included are small areas of soils that have sandstone and shale within a depth of 60 inches.
Typically the surface layer of this Otero soil is brown sandy loam about 10 inches thick.
The underlying material to a depth of 60 inches is pale brown calcareous fine sandy loam.
Permeability is rapid.Available water capacity is moderate.The effective rooting depth is
60 inches or more. Surface runoff is medium,and the erosion hazard is low.
This soil is used almost entirely for irrigated crops.It is suited to the crops commonly
grown in the area.Perennial grasses and alfalfa or close growing crops should be grown at
least 50 percent of the time.Contour ditches and corrugations can be used in irrigating close
grown crops and pasture.Furrows,contour furrows,and cross slope furrows are suitable for
row crops. Sprinkler irrigation is also desirable.Keeping tillage to a minimum and utilizing
crop residue help to control erosion.Maintaining fertility is important.Crops respond to
applications of phosphorus and nitrogen.
The potential native vegetation on this site is dominated by sand bluestem,sand reedgrass,
and blue grama.Needleandthread,switchgrass,sideoats grama,and western wheatgrass are
also prominent.Potential production ranges from 2,200 pounds per acre in favorable years to
1,800 pounds in unfavorable years.As range condition deteriorates,the sand bluestem,sand
reedgrass,and switchgrass decrease,and blue grama,sand dropseed,and sand sage increase.
I
Annual weeds and grasses invade the site as range condition becomes poorer.
Management of vegetation on this soil should be based on taking half and leaving half of
the total annual production. Seeding is desirable if the range is in poor condition. Sand
bluestem, sand reedgrass,switchgrass,sideoats grama,blue grama,pubescent wheatgrass,and
crested wheatgrass are suitable for seeding. The grass selected should meet the seasonal
requirements of livestock. It can be seeded into a clean, firm sorghum stubble,or it can be
drilled into a firm prepared seedbed.Seeding early in spring has proven most successful.
Windbreaks and environmental plantings are generally suited to this soil. Soil blowing,the
principal hazard in establishing trees and shrubs,can be controlled by cultivating only in the
tree row and by leaving a strip of vegetation between the rows. Supplemental irrigation may
be needed at the time of planting and during dry periods.Trees that are best suited and have
good survival are Rocky Mountain juniper,eastern redcedar,ponderosa pine,Siberian elm,
Russian-olive,and hackberry.The shrubs best suited are skunkbush sumac,lilac,and Siberian
peashrub.
Wildlife is an important secondary use of this soil.Ring-necked pheasant,mourning dove,
and many non-game species can be attracted by establishing areas for nesting and escape
cover.For pheasants,undisturbed nesting cover is essential and should be included in plans
for habitat development, especially in areas of intensive agriculture.
Rapid expansion of Greeley and the surrounding area has resulted in urbanization of much
of this Otero soil.The soil has excellent potential for urban and recreational development.
The only limiting feature is the moderately rapid permeability in the substratum,which causes
a hazard of ground water contamination from sewage lagoons.Lawns,shrubs, and trees grow
well.Capability subclass Hie irrigated,Vie non irrigated;Sandy Plains range site.
4.
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