PERMFILE117261

• Permit No: X200522600
• IBM Index Class Name: Permit File
• Doc Date: 2/21/2005
• Doc Name: NOI Application
• From: Environmental Alternatives, Inc.
• To: DMG
• Media Type: D
• Archive: No

Fremont County Area, Colorado
This unit is suited to production of ponderosa pine.
The site index for ponderosa pine is about 40.
These soils are poorly suited to homesite
development. The main limitations on the Tolex soil are
the slope and the depth to bedrock. The main
limitations on the Larkson soil are the slope, the slow
permeability, and a high shrink-swell potential.
The capability classification is Vlle, nonirrigated. The
unit is in the Ponderosa Pine woodland site.
117-Travessilla channery loam, 5 to 20 percent
slopes. This shallow, well drained soil is on cuestas. It
formed in residuum derived dominantly from sandstone.
The rrative~uegetation is mainly pinyon and juniper.
Elevation is 5,300 to 6,800 feet. The average annual
precipitation is 12 to 15 inches, the average annual air
temperature is 49 to 53 degrees F, and the average
Trost-free period is 120 to 150 days.
The soil is typically channery loam about 14 inches
deep over sandstone. The soil is moderately alkaline.
Included with this soil in mapping are areas of the
very gravelly Sedillo soils and Kim soils along
drainageways. These soils are deep. Sedillo soils make
up about 5 percent of the unit. Kim soils also make up
about 5 percent of the unit. Also included are areas of
soils that are similar to the Travessilla soil but are 20 to
40 inches thick. These soils make up about 5 percent of
the unit. They are intermingled with the Travessilla soil
on broad cuesta tops.
Permeability is moderate in the Travessilla soil.
Available water capacity is very low. Effective rooting
depth is 6 to 20 inches. Runoff is medium or rapid, and
the hazard of water erosion is moderate or high.
This soil is used as noncommercial woodland, for
wildlife habitat, or for livestock grazing.
The potential plant community is mainly pinyon and
juniper and an understory of Scribner needlegrass,
sideoats grama, blue grama, Gambel oak, and
mountainmahogany. The potential production of native
understory vegetation in normal years is about 300
pounds of air-dry vegetation per acre. If the condition of
the understory deteriorates, red threeawn, sand
dropseed, pricklypear, and yucca increase. In several
large areas, the pinyon and juniper have been chained.
The surface cover in these areas is presently dominated
by grasses.
Woodland products, such as firewood and pinyon
nuts, are produced in areas of this soil. After pinyon
and juniper are thinned or harvested, seeding grasses
reduces the hazard of erosion. Deferring grazing in
harvested areas for at least 2 years ensures the
development of a plant cover that is sufficient to protect
the soil from erosion.
85
This soil is poorly suited to homesite development.
The main limitation is the depth to bedrock.
The capability classification is Vlle, nonirrigated. The
soil is in the Pinyon-Juniper woodland site.
118-Travessilla-Rock outcrop complex, 5 to 50
percent slopes. This map unit is on canyonsides,
hogbacks, and cuestas. The native vegetation is mainly
pinyon and juniper. Elevation is 5,300 to 6,800 feet. The
average annual precipitation is 12 to 15 inches, the
average annual air temperature is 48 to 52 degrees F,
and the average frost-free period is 120 to 150 days.
This unit is about 55 percent Travessilla soil and 30
percent Rock outcrop. The components are so
intricately intermingled that it was not practical to map
them separately at the scale used.
Included in mapping are areas of the clayey Louviers
soils in narrow bands over shale. These soils are
shallow. They make up about 10 percent of the unit.
Also included are areas of the deep Kim soils. These
soils have a surface layer of loam. They make up about
5 percent of the unit. On foot slopes and along
drainageways are soils that are similar to the
Travessilla soil but are noncalcareous throughout.
The Travessilla soil is shaNow and well drained. It
formed in residuum derived dominantly from sandstone.
Slopes range from 5 to 50 percent. The surface layer is
light brownish gray channery sandy loam about 4
inches thick. The substratum is sandy loam about 5
inches thick. Sandstone bedrock is at a depth of 9
inches. The soil is mildly alkaline to a depth of 4 inches
and is moderately alkaline below that depth. In some
areas the surface layer is channery loam.
Permeability is moderately rapid in the Travessilla
soil. Available water capacity is very low. Effective
rooting depth is 4 to 20 inches. Runoff is rapid, and the
hazard of water erosion is high or very high.
The Rock outcrop consists of calcareous or
noncalcareous sandstone. It occurs as cliffs about 15 to
30 feet high and low ledges about 1 to 6 feet high. In
many areas, only the surface of the bedrock is exposed.
Slopes range from 10 to 50 percent.
This unit is used as noncommercial woodland or for
wildlife habitat. In some areas the slope limits access
by livestock.
The potential plant community is mainly pinyon and
juniper and an understory of Scribner needlegrass,
sideoats grama, blue grama, little bluestem, Gambel
oak, and mountainmahogany. The potential production
of native understory vegetation in normal years is about
300 pounds of air-dry vegetation per acre. If the
condition of the understory deteriorates, red threeawn,
pricklypear, and shrubs increase.
Woodland products, such as firewood and pinyon