LOCATION SCOTTIES WAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, isotic, frigid Andic Dystroxerepts
TYPICAL PEDON: Scotties gravelly ashy loam, forested. (Colors are for dry soil unless otherwise noted.)
Oi--0 to 1 inch; undecomposed forest litter. (1/2 to l inch thick)
Bwl--1 to l1 inches; pale brown (l0YR 6/3) gravelly ashy loam, brown (l0YR 4/3) moist; weak medium crumb structure; soft, very friable, nonsticky and nonplastic; many fine and very fine roots; many fine and medium tubular pores; l5 percent pebbles, 2 percent cobbles; slightly acid (pH 6.2); gradual smooth boundary (7 to l2 inches thick)
2Bw2--l1 to l9 inches light yellowish brown (l0YR 6/4) gravelly loam, dark yellowish brown (l0YR 4/4) moist; weak medium crumb structure; soft, very friable, nonsticky, nonplastic; many fine and very fine roots; many fine and medium tubular pores; l5 percent pebbles and 2 percent cobbles; slightly acid (pH 6.2); clear smooth boundary. (5 to l0 inches thick)
2Cl--l9 to 31 inches; yellowish brown (l0YR 5/6) very gravelly loam, dark yellowish brown (l0YR 3/4) moist; massive; slightly hard, friable, nonsticky, nonplastic; common fine roots; many medium and large tubular pores; 30 percent pebbles and l0 percent cobbles; slightly acid (pH 6.4); gradual smooth boundary. (l0 to 26 inches thick)
2C2--31 to 45 inches; light yellowish brown (l0YR 6/4) extremely cobbly sandy loam, dark brown (l0YR 4/3) moist; massive; slightly hard, friable, nonsticky, nonplastic; few fine and medium roots; common fine and medium tubular pores; 20 percent pebbles and 45 percent cobbles; slightly acid (pH 6.4); abrupt wavy boundary. (l2 to 38 inches thick)
2R--45 inches; sandstone.
TYPE LOCATION: Chelan County, Washington; about 3 miles west of Swauk Pass; 300 feet west and 300 feet north of the southeast corner of sec. 36, T. 22 N., R. l7 E., W.M.
RANGE IN CHARACTERISTICS: Solum is l5 to 20 inches thick. The upper 7 to l2 inches is dominated by volcanic ash. Soil reaction ranges from moderately acid to neutral. The average annual soil temperature ranges from 4l to 46 F. These soils are dry in the moisture control section for 60 to 75 consecutive days following summer solstice. The control section averages 5 to l8 percent clay and has 35 to 80 percent coarse fragments. Depth to bedrock is more than 40 inches.
The Bw horizon has value of 5 or 6 dry and chroma of l through 4 dry, 3 or 4 moist. It is loam or sandy loam and has more than 60 percent volcanic ash in the fine earth fraction. It has l5 to 30 percent pebbles and 0 to 5 percent cobbles. Some pedons have a thin A horizon.
The 2Bw horizon has value of 5 or 6 dry and chroma of 3 or 4 moist and dry. It has l5 to 45 percent pebbles and 0 to 5 percent cobbles. It is gravelly loam, very gravelly sandy loam, or very gravelly loam.
The 2C horizon has hue of l0YR or 2.5Y, value of 5 to 7 dry, 3 to 5 moist, and chroma of 3 to 6 dry, 3 or 4 moist. It is very gravelly sandy loam or very gravelly loam and has 35 to 60 percent coarse fragments in the upper part and is extremely cobbly sandy loam or extremely cobbly loamy sand with 60 to 80 percent rock fragments in the lower part.
COMPETING SERIES: These are the Belzar, Bertolotti, Cliffdell, Hartill, Illabot, Inkler, Kloochman, Newbell, Rinker, Sugarbowl, Talls, and Threemile, Belzar, Kloochman, and Rinker soils have a lithic contact at 20 to 40 inches. Bertolotti soils have a solum 23 to 52 inches thick. Cliffdell soils are dry for 45 to 60 consecutive days. Hartill, Illabot and Sugarbowl soils have a paralithic contact at 20 to 40 inches. Inkler and Newbell soils are silt loam or loam and dominated by amorphous material and less than 60 percent volcanic ash in the upper part. Talls soils are l8 to 25 percent clay in the fine earth fraction in the particle-size control section. Threemile soils have free carbonates in the lower part of the particle-size control section.
GEOGRAPHIC SETTING: Scotties soils are on mountain sides that generally have a northerly aspect. Slopes range from 30 to 75 percent. These soils formed in colluvium and residuum derived primarily from sandstone of the Swauk Formation with a thin mantle of volcanic ash and loess. Elevations are 2,000 to 4,800 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 22 to 40 inches. The average January temperature is about 23 degrees F.; average July temperature is about 66 degrees F.; and the average annual air temperature is 4l to 44 degrees F. The growing season (28 degrees F.) is l40 to l65 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Chapot, Shaser, Blewett and Brisky soils. Chapot soils lack a volcanic ash mantle. Shaser soils have an argillic horizon. Blewett and Brisky soils have a lithic contact at depths of 10 to 20 inches.
DRAINAGE AND PERMEABILITY: Well drained; medium and very rapid runoff; permeability is moderate.
USE AND VEGETATION: Commercial woodland, wildlife habitat, and watershed. Native vegetation is Douglas-fir and grand fir with some western larch and scattered white pine and ponderosa pine. Understory vegetation is rose, Cascade Oregon-grape, pachystima, elksedge, pinegrass and ceanothus.
DISTRIBUTION AND EXTENT: East slopes of the Cascade Mountains in southern Chelan and Northern Kittitas Counties, Washington. The series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Chelan County, Washington, l979.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - from 1 to 11 inches (Bw1 horizon)
Cambic horizon - from 11 to 19 inches (2Bw2 horizon)
Base saturation (NH4Oac) - from 10 to 30 inches, less than 60 percent based on initial OSD classification of Dystric Xerochrepts.
Depth to diagnostic horizons and features are measured from the to of the first mineral layer.