LOCATION WAHOO                   WA

Established Series
Rev. JDC/TLA/RWL
09/2019

WAHOO SERIES

Landscape--canyonlands, plateaus, hills
Landform--canyon breaks, structural benches, hillslopes
Slope--0 to 30 percent
Parent material--colluvium and residuum derived from basalt mixed with loess
Mean annual precipitation--about 640 mm
Mean annual air temperature--about 8 degrees C
Depth class--shallow
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--typic

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Lithic Ultic Argixerolls

TYPICAL PEDON: Wahoo stony clay loam in an area of rangeland, on an 11-percent, south-facing slope at an elevation of 660 m

A--0 to 13 cm; stony clay loam, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/2) moist; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine roots; many very fine irregular pores; 15 percent gravel and 15 percent stones; slightly acid (pH 6.4); clear smooth boundary

Bt--13 to 30 cm; extremely stony clay loam, brown (7.5YR 4/4) dry, dark brown (7.5YR 3/2) moist; moderate fine and medium subangular blocky structure; hard, friable, moderately sticky and moderately plastic; many very fine and fine roots; many very fine irregular pores and few very fine tubular pores; 30 percent gravel, 20 percent cobbles, and 20 percent stones; common prominent clay films on ped faces and in pores; slightly acid pH 6.2); abrupt wavy boundary

R--30 cm; basalt

TYPE LOCATION: Klickitat County, Washington, about 21 km northwest of Goldendale; about 240 m north and 610 m east of the southwest corner of section 5, T. 5 N., R. 14 E.; latitude 45 degrees, 56 minutes, 40 seconds north and longitude 121 degrees, 5 minutes, 0 seconds west

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 10 degrees C
Soil moisture control section--dry in all parts 90 to 105 consecutive days within the 4 months following summer solstice in 6 years or more out of 10 years
Depth to bedrock--25 to 50 cm
Reaction--5.6 to 6.5 throughout
Thickness of mollic epipedon--20 to 50 cm

A horizon
Hue--5YR, 7.5YR
Value--4 or 5 dry
Chroma--3 or 4 dry, 2 or 3 moist
Thickness--3 to 18 cm

Bt horizon
Hue--7.5YR, 10YR
Value--4 or 5 dry
Chroma--3 or 4 dry, 2 or 3 moist
Texture of fine-earth fraction--silty clay loam, clay loam
Clay content--30 to 35 percent
Rock fragment content--averages 50 to 85 percent
Thickness--13 to 33 cm

COMPETING SERIES:
Lacy--dry 45 to 75 consecutive days following summer solstice; Oi horizon
Ragpie--35 to 45 percent welded tuff fragments in particle-size control section; pH of 6.6 to 7.3 throughout
Reilloc--dry 75 to 90 consecutive days following summer solstice; dominantly rounded quartzitic rock fragments in particle-size control section
Riggins--dry 45 to 75 consecutive days following summer solstice
Shinn--10 to 25 cm (very shallow) to a lithic contact (basalt); dry 75 to 90 consecutive days following summer solstice

GEOGRAPHIC SETTING:
Elevation--340 to 910 m
Slopes are 0 to 30 percent
Climate--warm, dry summers; cool, moist winters
Mean annual precipitation--380 to 1000 mm
Mean January air temperature--about -3 degrees C
Mean July air temperature--about 18 degrees C
Mean annual air temperature--8 to 9 degrees C
Frost-free season--110 to 140 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Dalig, Gunn--no lithic contact within a depth of 100 cm or more; on plateaus and benches
Itat--no lithic contact within a depth of more than 150 cm; on foothills and plateaus
Kaiders--no lithic contact within a depth of more than 150 cm; on mountains and foothills
Kiakus--50 to 100 cm (moderately deep) to a lithic contact (basalt); on plateaus, benches, and canyon breaks
Leidl--50 to 100 cm (moderately deep) to a lithic contact (basalt); on plateaus and canyon side slopes
Munset--50 to 100 cm (moderately deep) to a lithic contact (basalt); in depressions and on plateaus
Para--100 to 150 cm (deep) to a lithic contact (basalt); on plateaus

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--moderately high

USE AND VEGETATION:
Use--livestock grazing, wildlife habitat
Native vegetation--bottlebrush squirreltail, Lemmon's needlegrass, Idaho fescue, Sandberg bluegrass, bluebunch wheatgrass, largehead clover

DISTRIBUTION AND EXTENT: East slopes of Cascade Mountains, in Klickitat and Yakima Counties, Washington; MLRAs 8 and 6; small extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Klickitat County, Washington; 2003

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Mollic epipedon--zone from the surface to a depth of 30 cm
*Argillic horizon--zone from 13 to 30 cm
*Depth to lithic contact--30 cm
*Particle-size control section--zone from the surface to a depth of 30 cm

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National Cooperative Soil Survey
U.S.A.