PERMFILE68703

• Permit No: M1999003
• IBM Index Class Name: Permit File
• Doc Date: 1/27/1999
• Doc Name: CONSTRUCTION MATERIALS LIMITED IMPACT 110 OPERATION RECLAMATION PERMIT APPLICATION FORM
• Media Type: D
• Archive: No

22
Indian ricegrass, blue grams, and sand dropseed. Little
bluestem can be expected to become dominant on
north-facing, gravelly slopes. Other native species,
including Scribner needlegrass, Gambel oak, pinyon
ricegrass, yucca, pricklypear, and walkingstick cholla,
can be expected to invade the site over a long period of
lime. Many areas may eventually support a widely
spaced stand of pinyon and juniper and a grassy
understory. Some small areas that have an extremely
acid surface layer have typically remained barren for
about 1 year after planting.
Most areas of these soils are poorly suited to
homesite development. The main limitation is the slope.
The capability classification is Vlle, nonirrigated. No
range site is assigned.
6-Bloom loam, 0 to 2 percent slopes. This deep,
poorly drained soil is on stream terraces. It formed in
alluvium. The native vegetation is mainly salt-tolerant
grasses. Elevation is 4,900 to 5,300 feet. The average
annual precipitation is 11 to 12 inches, the average
annual air temperature is 51 to 53 degrees F, and the
average frost-free period is 155 to 170 days.
The surface layer is typically mottled, light brownish
gray loam about 3 inches thick. The upper part of the
substratum is silty clay loam about 46 inches thick, and
the lower part is extremely gravelly sand to a depth of
60 inches or more. The soil is moderately alkaline and
calcareous.
Permeability is moderate. Available water capacity is
high. In most areas the soil is slightly saline or
moderately saline in the upper 2 feet. Effective rooting
depth is limited for plants that are sensitive to water. A
seasonal high water table fluctuates between depths of
6 and 24 inches in the spring and early summer. The
soil is subject to occasional, very brief periods of
flooding. Runoff is slow, and the hazard of water
erosion is slight.
Most areas of this soil are used mainly for irrigated
pasture and hay. Some areas are used as rangeland.
The potential plant community is mainly alkali
sacaton, western wheatgrass, switchgrass, and inland
saltgrass. The average annual production of air-dry
vegetation Is about 2,000 pounds per acre.
This soil is best suited to irrigated grass crops.
Wetness limits the choice of plants and the period of
cutting or grazing. I[ also increases the risk of winterkill.
Salt-tolerant species are the most suitable for planting
because the high water table tends to cause a
concentration of salts in the surface layer. A drainage
system and irrigation water management can reduce
the cdncentration of salts.
Irrigation water can be applied by flooding from
contour ditches, by corrugation, or by border flooding.
Soil Survey
Applying the water carefully helps to prevent the buildup
of a high water table. A drainage system may also be
needed. Grazing when the soil is wet results in
compaction of the surface layer, poor filth, and
excessive runoff.
Periodically mowing and clipping the pasture help to
maintain uniform growth, discourage selective grazing,
and reduce clumpy growth. Annual applications of
nitrogen fertilizer are needed to maintain the production
of high-quality irrigated pasture. If properly managed,
this soil can produce 2.5 tons of irrigated grass hay per
acre.
This soil is poorly suited to homesite development.
The main limitations are the wetness and the hazard of
flooding.
The capability classification is IVw, irrigated, and
Vlw, nonirrigated. The soil is in the Salt Meadow R30
range site.
7-Boyle very gravelly sandy loam, 10 to 40
percent slopes. This shallow, well drained soil is on
mountainsides and hills. It formed in residuum derived
dominantly from gneiss and granite. The native
vegetation is maihly pinyon and juniper. Elevation is
7,200 to 8,500 feet. The average annual precipitation is
14 to 18 inches, the average annual air temperature is
43 to 46 degrees F, and the average frost-free period is
85 to 110 days.
The surface layer is typically very dark grayish brown
very gravelly sandy loam about 3 inches thick. The
subsoil is extremely gravelly sandy clay loam about 14
inches thick. Soft gneiss is at a depth of about 17
inches. The soil is neutral. In some areas the surface
layer is very cobbly sandy loam.
Included with this soil in mapping are areas of the
deep Bronell and Jodero soils. Bronell soils have a
surface layer of very gravelly loam. They are on toot
slopes. Jodero soils have a surface layer of sandy
loam. They are in drainageways. Bronell soils make up
about 5 percent of the unit. Jodero soils also make up
about 5 percent of the unit. They are less gravelly than
the Boyle soil. Also included are areas of gneiss or
granite rock outcrop on the upper part of side slopes
and ridges. These areas make up about 5 percent of
the unit.
Permeability is moderate in the Boyle soil. Available
water capacity is very low. Effective rooting depth is 10
to 20 inches. Runoff is rapid or very rapid, and the
hazard of water erosion is high or very high.
This soil is used as noncommercial woodland, for
wildlife habitat, or for livestock grazing. The slope limits
access by livestock, and thus overgrazing is a concern
in the less sloping areas.
The potential plant community is mainly pinyon and