LOCATION SODACREEK WAEstablished Series
TAXONOMIC CLASS: Medial over loamy-skeletal, micaceous Typic Vitricryands
TYPICAL PEDON: Sodacreek bouldery fine sandy loam--under coniferous forest on a 35 percent south-facing footslope at an elevation of 2,150 feet. (Colors are for dry soil unless otherwise stated. All textures are apparent field textures.)
Oi--1 to 0 inches; undecomposed forest litter.
E--0 to 1/4 inches; gray (10YR 6/1) bouldery fine sandy loam, dark gray (10YR 4/1) moist; weak fine crumb structure; soft, very friable, nonsticky and nonplastic; few very fine roots, few fine tubular pores; 3 percent surface boulders; neutral (pH 6.6); abrupt smooth boundary. (1/4 to 1/2 inch thick)
Bw1--1/4 to 9 inches; pale brown (10YR 6/3) bouldery fine sandy loam, dark brown (10YR 4/3) moist; weak medium subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; many fine medium and coarse roots; common fine and medium tubular pores; 5 percent hard pebbles, 5 percent soft pebbles, 5 percent cobbles and 5 percent boulders; slightly acid (0H 6.2) gradual wavy boundary. (7 to 10 inches thick)
Bw2--9 to 20 inches; pale brown (10YR 6/3) gravelly fine sandy loam; dark grayish brown (10YR 4/2) moist; weak medium subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; many fine, very fine and medium roots, many fine and medium tubular pores; 15 percent hard pebbles, 10 percent soft pebbles and 5 percent cobbles; neutral (pH 6.6); gradual wavy boundary. (10 to 12 inches thick)
2C--20 to 60 inches; very pale brown (10YR 7/3) very gravelly fine sandy loam, pale brown (10YR 6/3) moist; massive; slightly hard, very friable, nonsticky and nonplastic; common fine and medium roots; few fine tubular pores; 25 percent hard pebbles, 10 percent soft pebbles, 10 percent cobbles, 5 percent soft cobbles, 5 percent stones and 5 percent boulders; neutral (pH 6.6).
TYPE LOCATION: Chelan County, Washington; about 5 miles west of Lake Wenatchee; 1,000 feet south and 300 feet west of center of sec. 11, T. 27 N., R. 15 E.
RANGE IN CHARACTERISTICS: Mean annual soil temperature at 20 inches estimated to be 43 to 45 degrees F. The upper part of the particle-size control section has an estimated moist bulk density of 0.85 to 1.00 g/cc, volcanic glass content of 5 to 30 percent, acid-oxalate extractable aluminum plus one-half of the acid-oxalate extractable iron of more than 2.0 percent and 15-bar water retention of 12 to 15 percent for air dried samples. Rock fragments in the particle-size control section average from 35 to 60 percent. Depth to the 2C horizon ranges from 14 to 30 inches. Soil reaction ranges from moderately acid to neutral.
The E horizon has dry value of 6 or 7, moist of 4 to 6. Chroma is 1 or 2 dry or moist.
The Bw horizons have hue of 7.5YR or 10YR, value of 5 or 6 dry, 4 or 5 moist, and chroma of 2 to 4 dry and moist. Texture is gravelly fine sandy loam, bouldery fine sandy loam or gravelly sandy loam.
The C horizon has hue of 2.5YR or 10YR, value of 6 or 7 dry, 4 to 6 moist, and chroma of 1 to 4 dry or moist. Texture is very gravelly fine sandy loam or very stony silt loam.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Sodacreek soils are on mountainsides and valleys. Slopes are 25 to 90 percent. Elevations are 2,100 to 4,900 feet. These soils formed in colluvium and landslide material from weathered mica schist mixed with volcanic ash. They are in a climate with warm, dry summers and cold, moist winters. The mean annual precipitation is about 75 to 85 inches. The mean January temperature is about 62 degrees F, the mean July temperature is about 23 degrees F, mean annual air temperature is about 42 degrees F. Growing season at 28 degrees F is 120 to 155 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Devore soils and the Vabbing and Soda soils. Soda soils are medial over loamy-skeletal. Vabbing soils are pumiceous or ashy-pumiceous over medial-skeletal.
DRAINAGE AND PERMEABILITY: Moderately well drained, medium to very rapid runoff and moderate permeability. These soils have a higher amount of moisture than nearby soils because of seepage from higher elevations.
USE AND VEGETATION: Woodland, wildlife habitat, watershed and recreation. Native vegetation is Douglas-fir, lodgepole pine, grand fir, and western redcedar with an understory of vine maple, pachystima, Oregon-grape, willow, Oregon wintergreen, queencup beadlily, and western brackenfern.
DISTRIBUTION AND EXTENT: East slopes of the Cascade Mountains in west central Chelan County, Washington. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Chelan County, Washington, 1986. Source of name is Soda Creek in Chelan County.
REMARKS: Diagnostic horizons and features recognized in this pedon are an albic horizon from mineral surface to 1/4 inches, a cambic horizon from 1/4 to 20 inches, and a lithologic change at 20 inches. The soil above 20 inches has a component of volcanic ash and below is mostly colluvium from mica schist. This description reflects a change in classification due to Andisols order from loamy-skeletal, micaceous, Typic Cryochrepts to medial over loamy-skeletal, micaceous, Typic Vitricryands.