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PUEBLO AREA, COLORADO
<br />Runoff is slow, and the hazard of erosion is moderate.
<br />Most of the acreage is used for irrigated and dryland
<br />alfalfa. The native vegetation is mainly needlegrass,
<br />wheatgrass, and some cottonwoods, and Gambel oak
<br />along the creek channels. Capability units IIe-1, ir-
<br />rigated, IIIe-1, nonirrigated; Loamy Foothills range
<br />site.
<br />Travessilla Series
<br />The Travessilla series consists of shallow, well-
<br />drained soils. These soils formed on uplands in
<br />1•esiduum that weathered from sandstone. They are
<br />underlain by bedrock between depths of 10 and 20
<br />inches. The slope is 1 to 90 percent, and elevation
<br />is 4,500 to 5,500 feet. The average annual precipitation
<br />is 12 inches. The average annual temperature is 53° F,
<br />and the frost-free season is 130 to 175 days. The native
<br />vegetation is mainly plains grasses and juniper.
<br />In a representative profile the surface layel•is pink-
<br />ish-gl•ay sandy loam about 6 inches thick. The sub-
<br />surface layer is light-brown sandy loam about 4 inches
<br />thick. The Underlying material is pale-brown loam
<br />about 4 inches thick. Hard sandstone is at a depth of
<br />about 14 inches.
<br />Permeability is moderate, and the available water
<br />capacity is low. The surface layer is mildly alkaline,
<br />and the underlying material is moderately alkaline.
<br />The 1•oot zone extends to a depth of 10 to 20 inches.
<br />These soils al•e Used for grazing, watershed, and wild-
<br />life habitat.
<br />Representative profile of Travessilla sandy loam, 1
<br />to 9 percent slopes, in dative grass, 0.3 mile north and
<br />0.15 mile east of the southwest corner of sec. 20, T.
<br />26 S., R. 60 W.
<br />Al-0 to 6 inches, pinkish-gray (7.5YR 6/2) sandy loam,
<br />dark brown (7.5YR 412) when moist; weak, thin, platy
<br />structure; slightly hard, very friable; nonsticky and
<br />nonplastic; few, small, angular pebbles; weakly cal-
<br />careous; moderately alkaline; clear, smooth boundary.
<br />AC-0 to 10 inches, light-brown (7.5YR 6/4) sandy loam,
<br />dark brown (7.5YR 4/4) whey moist; weak, fine, sub-
<br />angular blocky structure; slig~h try hard, very friable;
<br />nonsticky and slightly plastic; few, small, angular
<br />pebbles; strongly calcareous; moderately alkaline; clear,
<br />smooth boundary.
<br />Cca-10 to 19 inches, pale-brown (lOYR 6/~~) loam, brown
<br />(SOYR 5/3) when moist; massive; slightly hard, very
<br />friable; nonsticky and slightly plastic; strongly cal-
<br />careous; concentrations of segregated lime in places;
<br />moderately alkaline; abrupt, smooth boundary.
<br />R-14 inches, hard Dakota sandstone.
<br />The A and C horizons are loam of sandy loam. The A
<br />horizon is 4 to 7 inches thick and in places is noncalcareous.
<br />In places the Cca horizon has coarse fragments that have
<br />coatings of lime on their underside. Depth to the R horizon
<br />ranges from 10 to 20 inches. The content of coarse frag-
<br />ments, mostly angular pebbles and channery pieces of sand-
<br />stone, ranges from about 10 to 30 percent.
<br />ToD-Travessilla sandy loam, 1 to 9 percent slopes.
<br />This soil is in the southern and westel•n parts of the
<br />survey a1•ea in long areas that cover as much as 1,000
<br />ac1•es. This soil has the profile described as repl•esenta-
<br />tive of the series, but on about 30 percent of the
<br />acreage the surface layer is loam and slopes are convex
<br />and about 3 pel•cent.
<br />Included with this soil in mapping are areas of
<br />S5
<br />Kim loam and Rock outcrop; each of these make up
<br />about 10 percent of the acreage.
<br />Runoff is rapid, and the hazard of erosion is slight.
<br />This soil has potential for recreation use and for
<br />wildlife use if the habitat can be improved. The native
<br />vegetation is mainly cactus, yucca, grams, needlegrass,
<br />and small juniper trees. Capability unit VIIs-3, non-
<br />irrigated; Sandstone Breaks range site.
<br />TrG-Travessilla-Rock outcrop complex, 30 to 90
<br />percent slopes. This complex is on side slopes and
<br />]]early vertical canyon walls in the southern part of
<br />Pueblo County. It is made up of about 40 percent
<br />Travessilla sandy loam and 40 percent Rock outcrop.
<br />Areas of this complex are elongated and cover as much
<br />as 800 acres.
<br />The Travessilla soil in this complex has a profile
<br />similar to the one described as representative of the
<br />Travessilla series.
<br />Included with these soils in mapping are areas of
<br />Wiley loam and Kim loam; these make up about 20
<br />percent of the acreage.
<br />Runoff is rapid, and the hazard of erosion is slight.
<br />Most of the acreage is steep and rocky and provides
<br />only limited grazing. The native vegetation is mainly
<br />a sparse stand of grass and scattered stands of juniper.
<br />Capability unit VIIs-3, nonirrigated; Travessilla soil
<br />in Sandstone Breaks range site; Rock outcrop not
<br />i11 a range site.
<br />Valent Series
<br />Tl1e Valent set•ies consists of deep, excessively
<br />dl•ained soils. These soils formed on uplands in eolian
<br />sand. The slope is 1 to 7 percent, and elevation is
<br />4,400 to 5,200 feet. The average annual precipitation
<br />is 12 inches. The average annual temperature is 52° F,
<br />and the fl•ost-free season is 130 to 160 days. The native
<br />vegetation is mainly mid plains grasses.
<br />In a representative pl•ofile the surface layer is light
<br />brownish-gray loamy sand about 4 inches thick. The
<br />underlying material is pale-brown fine sand about 31
<br />inches thick over very pale brown fine sand that ex-
<br />teltds to a depth of 60 inches or more.
<br />Permeability is vet•y rapid, and the available water
<br />capacity is low. The surface layel• is mildly alkaline,
<br />and the underlying material is neutral. The root zone
<br />extends to a depth of more than 60 inches. These soils
<br />are used for grazing.
<br />Representative profile of Valent loamy sand, in
<br />grass, 0.2 mile west and 0.35 mile south of the north-
<br />east corner of sec. 22, T. 20 S., R. 60 W.
<br />Al-0 to 9 inches, light brownish-gray (lOYR 6/2) loamy
<br />sand, grayish brown (lOYR 5/2) when moist; single
<br />grained; loose; nonsticky and nonplastic; mildly alka-
<br />line; clear, smooth boundary.
<br />Cl-4 to 35 inches, pale-brown (lOYR 6/3) fine send, brown
<br />(lOYR 5/3) when moist; single grained; loose; non-
<br />sticky and nonplastic; mildly alkaline; diffuse, smooth
<br />boundary.
<br />C2-35 to 00 inches, very pale brown (IOY"R 7/4) fine sand,
<br />yellowish brown (]OYR 5/4) when moist; single
<br />grained; loose; nonsticky and nonplastic; neutral.
<br />The A horizon is loamy fine sand or fine sand 4 to 10
<br />inches thick. The C horizon is sand or fine sand. In places,
<br />lime is at a depth of 40 to 60 inches.
<br />B 6
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