Soils

This association occupies about 12% of the watershed and is principally the high mountain uplands in the southwestern and southeastern part. The principle area extends about 10 kilometers south from the Whisky Hill road. A smaller area is in the extreme southeastern part of Slack Mountain. The association is dominantly represented by dark or very dark soils in rolling to steep uplands. The soils formed in material weathered from granitic rocks. The vegetation consists of bluebunch wheatgrass, Idaho fescue, big sagebrush, mountain mahogany, rabbitbrush, bitterbrush, snowberry, lupine, yarrow, Indian paintbrush, larkspur, and wild mustard.

This soil consists of about 60% Takeuchi soils, 25% Kanlee soils and about 10% Ola soils. Takeuchi soils occupy the lower, warmer and drier areas, particularly the south slopes; Kanlee soils occupy the ridges; and Ola soils are on the steep northerly slopes. Takeuchi soils typically have dark grayish brown coarse sandy loam A1 horizons and coarse sandy loam B horizons. The Kanlee soils typically have very dark grayish brown coarse sandy loam A1 horizons and slightly gravelly sandy clay loam B2t horizons. Ola soils typically have thick very dark grayish brown coarse sandy loam A1 horizons and bedrock between depths of 51 to 102 centimeters.

This association occupies about 25% of the watershed in the extreme southwest and northwest parts and consist of high, undulating to steep uplands and associated erosion surfaces. Basalt is the principle rock type. Virtually all of the soils are free of calcium carbonate and are at least slightly acid. The vegetation consists of big sagebrush, snowberry, bluebunch wheatgrass, Idaho fescue, mountain bromegrass, lupine, Sandberg bluegrass, yarrow, cheatgrass, junegrass, stipa, bitterbrush, giant wildrye, mules ear and some serviceberry, elderberry, wild buckwheat, wild rose, rabbitbrush, arrowleaf balsamroot, mint, aspen and scattered Douglas-fir.

The Harmehl and Gabica soils represent about one-third each of this association; the Demast soils, about 10%; and the Nettleton and Gemid soils about 24%. The Harmehl soils occupy ridges and less steep slopes at the higher elevations. The Gabica soils have mostly south slopes and the Demast soils occupy steep northerly slopes. The Gemid soils are mostly at the lower elevations of this association. The Nettleton soils are in alluvial and colluvial footslopes.

The Harmehl soils have a dark grayish brown and dark brown loam A1 horizons, brown gravelly and cobbly clay loam B2t horizons and are underlain by basalt at a depth between 51 to 102 centimeters. Gabica soils typically have dark grayish brown cobbly and gravelly loam A1 horizons and very gravelly clay loam B2lt horizons, and are underlain by basalt at depths between 25 and 51 centimeters. Demast soils have thick, very dark grayish brown gravelly loam A1 horizons, gravelly clay loam B2t horizons and are underlain by basalt at a depth below 102 centimeters. Gemid soils have dark gray loam and clay loam A1 horizons, clay B22t horizons and a basalt bedrock between 51 to 102 centimeters below the surface. The Nettleton soils typically have dark grayish brown loam A1 horizons, light colored A2 horizons and slightly gravelly clay B22t horizons. Bedrock is below a depth of 102 centimeters.

This association occupies about 4% of the watershed and is in the Black Mountain, Johnson Draw, and Reynolds Mountain areas. It is represented by dark soils in high, dissected, hilly to rolling uplands and alluvial deposits. The soils developed principally in materials weathered from rhyolitic or related rocks. The vegetation consists of big sagebrush, bitterbrush, rabbitbrush, snowberry, low sagebrush, bluebunch wheatgrass, Idaho fescue, Sandberg bluegrass, squirreltail grass, cheatgrass and other associated plants.

The Searla soils represent about 70% and the Bullrey soils about 20% of this association. The Searla soils typically have grayish brown dark grayish brown, very gravelly loam A1 horizons and very channery clay loam B22t horizons. Bedrock does not occur within 102 centimeters of the surface. Bullrey soils typically have thick, dark grayish brown, gravelly loam A1 horizons, gravelly loam Bt horizons and bedrock does not occur within 102 centimeters of the surface.

This association occupies about 3% of the watershed. It is located in the north-central part of the watershed in gently sloping to steep, dissected low uplands, pediments or alluvial deposits, which are underlain by light colored siltstone, tuff, or consolidated lacustrine sediments. The vegetation consists of big sagebrush, bitterbrush, rabbitbrush, cheatgrass, Sandberg bluegrass, squirreltail and some bluebunch wheatgrass and associated plants.

The Glasgow soils represent about 90% and the Lassen soils about 10% of this association. The Glasgow soils typically have light brownish gray loam A2 horizons and heavy clay loam B22t horizons. Lassen soils typically have dark grayish brown silty clay surface and subsurface soils.

This association occupies about 12% of the watershed. It is located in the lower, north-central part of the watershed and is represented by light and dark soils in level to moderately steep alluvial deposits and bottom lands. The vegetation consists of big sagebrush, Sandberg bluegrass, cheatgrass, bluebunch wheatgrass, spiny horsebrush, squirreltail grass, wild mustard, greasewood, shadscale, budsage, and some moss under the brush.

The Nannyton soils represent about 50%; the Larimer soils 30%; the Ackmen, dark gray variant, 12%; and other minor soils, the remainder of the association. Nannyton soils have light brownish gray gravelly loam A2 horizons, pale brown gravelly clay loam B2t horizons and a strong accumulation of lime below a depth of 25 to 41 centimeters. They are formed in alluvium weathered from mixed materials. Larimer soils typically have light brownish gray gravelly loam A2 horizons, slightly gravelly clay loam B2t horizons and a distinct accumulation of lime below a depth of 25 to 41 centimeters. They are formed in alluvium weathered from basaltic materials. The Ackmen dark gray variant soils typically have thick dark gray loam Ap horizons and stratified subsurface horizons, and are developed bottom land alluvium weathered mostly from granitic rocks.

This association occupies about 35% of the watershed and occurs in the northwestern, northeastern and east-central parts. The soils are dominantly dark and have developed from in materials weathered from basalt or in deep colluvium and alluvium weathered mostly from basaltic rocks. The vegetation consists of big sagebrush, bitterbrush, rabbitbrush, Sandberg bluegrass, squirreltail grass, cheatgrass, bluebunch wheatgrass and other forbs and grasses.

The Bakeoven soils represent about 30%; the Reywat soils, 25%; the Babbington soils, 20%; the Ruclick soils, 15%; and the Newell, Gemson, Lickskillet, and Squaw soils, the remainder of the association. The Bakeoven, Reywat, Ruclick and Lickskillet soils are in undulating to steep uplands. The Babbington, Gemson, Newell and Squaw soils occupy alluvial deposits, pediments, colluvial footslopes and other slopes in the uplands, and are developed in colluvium or local alluvium. In general, the Babbington soils are in the lower or drier areas and the Gemson, Newell and Squaw soils are in higher, more moist areas.

Typically, Bakeoven soils have brown very gravelly loam A1 horizons and brown very gravelly loam B horizons. Basalt is within 25 centimeters of the surface. Reywat soils typically have grayish brown stony loam A1 horizons and brown sandy clay loam B22t horizons, containing more than 35% coarse fragments. Basalt is at a depth between 25 and 51 centimeters and some calcium carbonate is just above the bedrock or in cracks in the bedrock. Babbington soils have grayish brown stony loam A1 horizons, brown clay loam B22t, and a moderate accumulation of lime below a depth of 38 to 56 centimeters. Ruclick soils have grayish-brown, very-stony gravelly loam A11 horizons and brown clay B22t horizons, containing more than 35% coarse fragments. Basalt bedrock is at a depth between 51 and 102 centimeters.

This association occupies about 6% of the watershed. It is located in the northern and west-central part of the watershed in rolling to steep dissected uplands, pediment surfaces and alluvial deposits. The soils range from light to dark and developed principally in residuum weathered from granite, arkosic rocks or related bedrock or in colluvium and alluvium, derived from such materials. The vegetation consists chiefly of big sagebrush, rabbitbrush, bluebunch wheatgrass, cheatgrass, Sandberg bluegrass, squirreltail grass and associated plants.

The Farrot and Castelvale soils represent about 35% each; the Brownlee soils, 15%, Haw, Lolalita and other soils, the remainder of the association. In general, the Farrot soils occupy ridges and southerly slopes in the more moist part of the association. The Brownlee soils occupy mainly northerly slopes at the higher elevations. The Castlevale soils are in the drier areas. The Haw and Lolalita soils occupy alluvial deposits, pediments and colluvial slopes. Bedrock is below a depth of 102 centimeters.

Farrot soils have dark grayish brown slightly gravelly coarse sandy loam A1 horizons, slightly gravelly coarse sandy clay loam B22t horizons and a weak lime accumulation. Bedrock is at a depth ranging from 51 and 102 centimeters. The Brownlee soils resemble the Farrot soils but typically have dark-gray A1 horizons, have no calcium carbonate and are more acid. The Castlevale soils typically have brown, extremely stony, fine gravelly coarse sandy loam A1 horizons, gravelly light coarse sandy clay loam B2t horizons and lime accumulations. Bedrock is at a depth between 25 and 51 centimeters.

This association occupies about 2% of the watershed. It consists primarily of light colored soils in hilly to steep uplands, slightly dissected pediment surfaces and alluvial and colluvial deposits in the northeastern part of the watershed. The soils developed in residuum weathered from rhyolite bedrock and in colluvium and alluvium derived from such materials. The vegetation is chiefly shadscale, spiny hopsage, budsage, cheatgrass, spiny horsebrush, squirreltail grass and wild mustard.

The Hoot soils are predominant in this association. Typically, Hoot soils have light brownish gray, very stony, very-gravelly loam A horizons and very gravelly loam B2tca horizons between fractures in the bedrock. Bedrock is within 51 centimeters of the surface. The Nannyton soils have light brownish gray gravelly loam A2 surface horizons, pale brown gravelly clay loam B2t horizons, strong accumulations of powdery lime below a depth of 25 to 41 centimeters and are underlying stratified sediments.