HomeMy WebLinkAbout20080506.tiff • •
• Attachment to USR Application -SE%
EnCana Oil &Gas(USA) Inc.
The following are the soil types found on the lands within the Subject Property. These descriptions are
taken from the Soil Survey of Weld County, Southern Part, published by the U.S.D.A.
47—Olney fine sandy loam, Ito 3 percent production ranges from 2,200 pounds per acre in
slopes.This is a deep, well drained soil on favor ble years to 1,800 pounds in unfavorable
plains at elevations of 4,600 to 5,200 feet. It years. As range condition deteriorates, the sand
formed in mixed outwash deposits. Included in bluestem, sand reedgrass, and switchgrass
mapping are small areas of soils that have a decrease and blue grams, sand dropseed, and
dark surface layer. Some small leveled areas are sand sage increase. Annual weeds and grasses
also included. invade the site as range condition becomes
Typically the surface layer of this Olney poorer.
soil is grayish brown fine sandy loam about 10 Management of vegetation on this soil
inches thick. The subsoil is yellowish brown and should be based on taking half and leaving half
very pale brown sandy clay loam about 14 of the total annual production. Seeding is
inches thick.The substratum to a depth of 60 desirable if the range is in poor condition. Sand
inches is very pale brown, calcareous fine sandy bluestem, sand reedgrasa, switchgrass, sideoats
loam. grams, blue grams, and pubescent wheatgrass
Permeability and available water are suitable for seeding.The grass selected
capacity are moderate. The effective rooting should meet the seasonal requirements of
depth is 60 inches or more-Surface runoff is livestock. It can be seeded into a clean,firm
medium, and the erosion hazard is haw. sorghum stubble, or it can be drilled into a firm
In irrigated areas this soil is suited to all prepared seedbed. Seeding early in spring has
crops commonly grown in the area, including proven most successful.
• corn, sugar beets, beans, alfalfa, small grain, Windbreaks and environmental plantings
are generally and onions.An example of a suitable suited to this soil. Soil blowing, the
cropping system is 3 to 4 years of alfalfa principal hazard in establishing trees and shrubs,
followed by corn, corn for silage, sugar beets, can be controlled by cultivating only in the tree
small grain, or beans. Land leveling, ditch lining, row and by leaving a strip of vegetation between
and installing pipelines may be needed for the rows. Supplemental irrigation may be needed
proper water application. All methods of irrigation at the time of planting and during dry periods.
are suitable, but furrow irrigation is the most Trees that are best suited and have good
common. Barnyard manure and commercial fer- survival are Rocky Mountain juniper, eastern
tilizer are needed for top yields. redcedar, ponderosa pine, Siberian elm,
In nonirrigated areas this soil is suited to Russian-olive, and hackberry.The shrubs best
winter wheat, barley, and sorghum. Most of the suited are skunkbush sumac, lilac, and Siberian
acreage is planted to winter wheat.The peashrub.
predicted average yield is 28 bushels per acre. Wildlife is an important secondary use of
The soil is summer fallowed in alternate years to this soil. The cropland areas provide favorable
allow moisture accumulation. Generally habitat for ring-necked pheasant and mourning
precipitation is too low for beneficial use of dove. Many nongame species can be attracted
fertilizer. by establishing areas for nesting and escape
Stubble mulch farming, strip-cropping, cover. For pheasants, undisturbed nesting cover
and minimum tillage are needed to control soil is essential and should be included in plans for
blowing and water erosion. Terracing also may habitat development, especially in areas of
be needed to control water erosion. intensive agriculture. Rangeland wildlife, for
The potential native vegetation on this example, the pronghorn antelope, can be
range site is dominated by sand bluestem, sand attracted by developing livestock watering
reedgrass, and blue grams. Needleandthread, facilities, managing livestock grazing, and
switchgrass, sideoata grams, and western reseeding where needed.
wheatgrass are alto prominent. Potential Rapid expansion of Greeley and the
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Page 1 of 3
2008-0506
• surrounding area has resulted in urbanization of The potential native vegetation on this
much of the Olney soil.This soil has good range site is dominated by sand bluestem, sand
potential for urban and recreational reedgrass, and blue grams. Needleandthread,
development. The only limiting feature is the switchgrass, sideoata grams, and western
moderately rapid permeability in the substratum, wheatgrass are alto prominent. Potential
which causes a hazard of ground water production ranges from 2,200 pounds per acre in
contamination from sewage lagoons. Lawns, favor ble years to 1,800 pounds in unfavorable
shrubs, and trees grow well. Capability subclass years. As range condition deteriorates, the sand
Ile irrigated, IVe nonirrigated; Sandy Plains bluestem, sand reedgrass, and switchgrass
range site. decrease and blue grams, sand dropseed, and
sand sage increase. Annual weeds and grasses
48—Olney fine sandy loam, 3 to 5 percent invade the site as range condition becomes
slopes.This is a deep, well drained soil on poorer.
plains at elevations of 4,600 to 5,200 feet. It Management of vegetation on this soil
formed in mixed outwash deposits. Included in should be based on taking half and leaving half
mapping are small areas of soils that have a of the total annual production. Seeding is
dark surface layer. Some small leveled areas are desirable if the range is in poor condition. Sand
also included. bluestem, sand reedgrasa, switchgrass, sideoats
Typically the surface layer of this Olney grams, blue grams, and pubescent wheatgrass
soil is grayish brown fine sandy loam about 10 are suitable for seeding.The grass selected
inches thick.The subsoil is yellowish brown and should meet the seasonal requirements of
very pale brown sandy clay loam about 14 livestock. It can be seeded into a clean,firm
inches thick.The substratum to a depth of 60 sorghum stubble, or it can be drilled into a firm
inches is very pale brown, calcareous fine sandy prepared seedbed. Seeding early in spring has
loam. proven most successful.
Permeability and available water Windbreaks and environmental plantings
• capacity are moderate. The effective rooting are generally suited to this soil. Soil blowing, the
depth is 60 inches or more-Surface runoff is principal hazard in establishing trees and shrubs,
medium, and the erosion hazard is haw. can be controlled by cultivating only in the tree
In irrigated areas this soil is suited to all row and by leaving a strip of vegetation between
crops commonly grown in the area, including the rows. Supplemental irrigation may be needed
corn, sugar beets, beans, alfalfa, small grain, at the time of planting and during dry periods.
potatoes, and onions. An example of a suitable Trees that are best suited and have good
cropping system is 3 to 4 years of alfalfa survival are Rocky Mountain juniper, eastern
followed by corn, corn for silage, sugar beets, redcedar, ponderosa pine, Siberian elm,
small grain, or beans. Land leveling, ditch lining, Russian-olive, and hackberry.The shrubs best
and installing pipelines may be needed for suited are skunkbush sumac, lilac, and Siberian
proper water application. All methods of irrigation peashrub.
are suitable, but furrow irrigation is the most Wildlife is an important secondary use of
common. Barnyard manure and commercial fer- this soil.The cropland areas provide favorable
tilizer are needed for top yields. habitat for ring-necked pheasant and mourning
In nonirrigated areas this soil is suited to dove. Many nongame species can be attracted
winter wheat, barley, and sorghum. Most of the by establishing areas for nesting and escape
acreage is planted to winter wheat.The cover. For pheasants, undisturbed nesting cover
predicted average yield is 28 bushels per acre. is essential and should be included in plans for
The soil is summer fallowed in alternate years to habitat development, especially in areas of
allow moisture accumulation. Generally intensive agriculture. Rangeland wildlife, for
precipitation is too low for beneficial use of example, the pronghorn antelope, can be
fertilizer. attracted by developing livestock watering
Stubble mulch farming, strip-cropping, facilities, managing livestock grazing, and
and minimum tillage are needed to control soil reseeding where needed.
blowing and water erosion. Terracing also may Rapid expansion of Greeley and the
• be needed to control water erosion. surrounding area has resulted in urbanization of
Page 2 of 3
• •
• much of the Olney soil. This soil has good
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
Ile irrigated, IVe nonirrigated; Sandy Plains
range site.
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• Page 3 of 3
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