LOCATION CULVING WAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, magnesic, frigid Typic Dystroxerepts
TYPICAL PEDON: Culving gravelly loam, forested. (Colors are for dry soil unless otherwise noted).
Oi--0 to 1 inch, undecomposed forest litter. (1/2 to 1 inch thick)
A--1 to 5 inches; brown (10YR 5/3) gravelly loam, dark yellowish brown (10YR 3/4) moist; weak medium granular structure; slightly hard, friable, nonsticky, nonplastic; many fine and medium roots; very few fine tubular pores; 10 percent pebbles and 5 percent cobbles; slightly acid (pH 6.4); abrupt wavy boundary. (3 to 8 inches thick)
Bwl--5 to 9 inches; pale brown (10YR 6/3) very gravelly loam, dark grayish brown (10YR 4/2) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; common fine roots; few fine tubular pores; 25 percent pebbles and 10 percent cobbles; neutral (pH 6.6) gradual smooth boundary. (4 to 10 inches thick)
Bw2--9 to 22 inches; light olive brown (2.5Y 5/4) very gravelly loam, dark grayish brown (2.5Y 4/2) moist; weak medium subangular blocky structure; hard, firm, slightly sticky, slightly plastic, common fine roots; few fine tubular pores; 45 percent pebbles and 10 percent cobbles; neutral (pH 6.6) abrupt smooth boundary. (13 to 22 inches thick)
R--22 inches; serpentine.
TYPE LOCATION: Chelan County, Washington; about 12 miles south of Peshastin; 2,140 feet east and 1,000 feet south of the northwest corner of sec. 11, T. 22 N., R. 17 E., W. M.
RANGE IN CHARACTERISTICS: Depth to a lithic contact with serpentine ranges from 20 to 40 inches. The average annual soil temperature ranges from 43 to 46 degrees F. The particle-size control section averages 35 to 85 percent rock fragments and is 20 to 30 percent clay. Soil reaction is slightly acid or neutral.
The A horizon has value of 5 or 6 dry and chroma of 3 or 4 moist and dry.
The Bwl horizon has value of 5 or 6 dry and chroma of 3 or 4 dry, 2, 3, or 4 moist. It is gravelly loam or very gravelly loam.
The Bw2 horizon has hue of 10YR or 2.5Y, value of 5 or 6 dry, 4 or 5 moist and chroma of 4, 5, or 6 dry, 2, 3, or 4 moist. It is very gravelly loam, very gravelly clay loam or extremely gravelly clay loam.
COMPETING SERIES: These are the similar Icicle, Scotties, and Standup soils. These soils have mixed mineralogy and are more than 40 inches deep.
GEOGRAPHIC SETTING: Culving soils are on mountainsides that generally have a northerly or easterly aspect. These soils formed in colluvium and residuum derived primarily from serpentine and minor amounts of loess and volcanic ash. Elevations are 2,400 to 5,000 feet. These soils are in a climate with warm, dry summers and cool, moist winters with a snowpack from about December through March. The average annual precipitation is 27 to 50 inches. The average January temperature is about 24 degrees F.; average July temperature is about 67 degrees F.; and the average annual air temperature is 42 to 44 degrees F. The growing season at 28 degrees F. is 135 to 170 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Kingmont, Nard and Serpen soils. Kingmont and Nard soils have an argillic horizon. In addition, Nard soils are deep. Serpen soils have a mollic epipedon.
DRAINAGE AND PERMEABILITY: Well drained; medium to very rapid runoff; permeability is moderate.
USE AND VEGETATION: Commercial woodland, wildlife habitat and watershed. Native vegetation is Douglas-fir, grand fir and lodgepole pine with an understory of pachystima, spirea, elk sedge, Rocky Mountain maple, pyrola, and western rattlesnake plantain.
DISTRIBUTION AND EXTENT: East slopes of the Cascade Mountains in southern Chelan County. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Chelan County, Washington, 1980.
REMARKS: Diagnostic horizons and features recognized in this pedon are an ochric epipedon from 1 to 5 inches, a cambic horizon from 5 to 21 inches and a lithic contact at 22 inches. The particle-size control section 11 to 22 inches has over 35 percent rock fragments. It is estimated to have a base saturation less than 60 percent in some part of the upper 30 inches and more than 40 percent by weight serpentine minerals.
Classification revised 1/00 based on recent changes to Soil Taxonomy from Dystic Xerochrepts to Typic Dystroxerepts.