_PERMIT FILE - M2001107

• Permit No: M2001107
• IBM Index Class Name: Permit File
• Section_Exhibit Name: EXHIBIT A LEGAL DESCRIPTION LOCATION MAP
• Media Type: D
• Archive: No

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WELD COUNTY, COLORADO, SOUTHERN PART 15
j rigating close grown crops and pasture. Furrows, contour of 4,850 to 5,050 feet. It formed in calcareous eolian
furrows, and cross slope furrows are suitable for row deposits. Included in mapping are small areas of soils that
crops. Sprinkler irrigation is also desirable. Keeping til- have fine sandy loam or loam underlying material and
lage to a minimum and utilizing crop residue help to con- small areas of soils that are shallow to moderately deep
trol erosion. Maintaining fertility is important. Crops over shale and sandstone.
respond to applications of phosphorus and nitrogen. Typically the surface layer of this Colby soil is pale
In nonirrigated areas this soil is suited to winter wheat. brown loam about 7 inches thick. The underlying material
The predicted average yield is 28 bushels per acre. The is very pale brown silt loam to a depth of 60 inches.
soil is summer fallowed in alternate years to allow Permeability is moderate. Available water capacity is
moisture accumulation. Generally precipitation is too low high. The effective rooting depth is 60 inches or more.
for beneficial use of fertilizer. Surface runoff is rapid, and the erosion hazard is high.
Stubble mulch farming, striperopping, and minimum til- This soil is suited to limited cropping. Intensive
lage are needed to control soil blowing and water erosion. cropping is hazardous because of erosion. The cropping
Terracing also may be needed to control water erosion. system should be limited to close grown crops, such as al-
The potential native vegetation is dominated by blue falfa, wheat, and barley. This soil also is suited to ir-
grama. Several mid grasses, such as western wheatgrass rigated pasture. A suitable cropping system is 3 to 4
and needleandthread, are also present. Potential produc- years of alfalfa followed by 2 years of corn and small
tion ranges from 1,600 pounds per acre in favorable years grain and alfalfa seeded with a nurse crop.
to 1,000 pounds in unfavorable years. As range condition Close grown crops can be irrigated from closely spaced
deteriorates, the mid grasses decrease; blue grams, buf- contour ditches or sprinklers. Contour furrows or sprin-
falograss, snakeweed, yucca, and fringed sage increase; klers should be used for new crops. Applications of
and forage production drops. Undesirable weeds and an- nitrogen and phosphorus help in maintaining good produc-
nuals invade the site as range condition becomes poorer. tion.
Management of vegetation on this soil should be based The potential native vegetation is dominated by blue
on taking half and leaving half of the total annual produc- grams. Sideoats grama, little bluestem, western wheat-
tion. Seeding is desirable if the range is in poor condition. grass, and sedge are also prominent. Potential production
Sideoats grams, little bluestem, western wheatgrass, blue ranges from 1.800 pounds per acre in favorable years to
grams, pubescent wheatgrass, and crested wheatgrass are 1,500 pounds in unfavorable years. As range condition
suitable for seeding, The grass selected should meet the deteriorates, the sideoats grama and little bluestem
seasonal requirements of livestock. It can be seeded into decrease, forage production drops, and blue grams, buf-
a clean, firm sorghum stubble, or it can be drilled into a falograss, and several perennial forbs and shrubs in-
firm prepared seedbed. Seeding early in spring has crease. Undesirable weeds and annuals invade the site as
proven most successful. range condition becomes poorer.
Windbreaks and environmental plantings of trees and Management should be based on taking half and leaving
shrubs commonly grown in the area are generally well half of the total annual production. Seeding is desirable if
suited to this soil. Cultivation to control competing the range is in poor condition. Sideoats grama, little
vegetation should be continued for as many years as bluestem, western wheatgrass, and pubescent wheatgrass
possible following planting. Trees that are best suited and are suitable for seeding. The grass selected should meet
have good survival are Rocky Mountain juniper, eastern the seasonal needs of livestock. It can be seeded into a
redcedar, ponderosa pine, Siberian elm, Russian-olive, and clean, firm sorghum stubble, or it can be drilled into a
hackberry. The shrubs best suited are skunkbush sumac, firm prepared seedbed. Plowing and drilling should be on
lilac, Siberian peashrub, and American plum. the contour to minimize runoff and soil losses. Seeding
Openland wildlife, such as pheasant, mourning dove, early in spring has proven most successful.
and cottontail, and rangeland wildlife, such as antelope, Windbreaks and environmental plantings of trees and
cottontail, and coyote, are best suited to this soil. Under shrubs commonly grown in the area are generally well
irrigation, good wildlife habitat can be established, suited to this soil. Cultivation to control competing
benefiting many kinds of openland wildlife. Forage vegetation should be continued for as many years as
production is typically low on rangeland, and grazing possible following planting. Trees that are best suited and
management is needed if livestock and wildlife share the have good survival are Rocky Mountain juniper, eastern
range. Livestock watering facilities also are utilized by redcedar, ponderosa pine, Siberian elm, Russian-olive, and
various wildlife species. hackberry. The shrubs best suited are skunkbush sumac,
This soil has good potential for urban and recreational lilac, Siberian oeashrub, and American plum.
developments. Road design can be modified to compen- Openland wildlife, such as pheasant, mourning dove,
sate for the limited capacity of this soil to support a load. and cottontail, and rangeland wildlife, such as antelope,
Capability subclass IIle irrigated, IVe nonirrigated; cottontail, and coyote, are best suited to this soil. Under
Loamy Plains range site. irrigation, good wildlife habitat can be established,
17—Colby loam, 5 to 9 percent slopes. This is a deep, benefiting many kinds of openland wildlife. Forage
well drained soil on upland hills and ridges at elevations production is typically low on rangeland, and grazing