LOCATION SADIE WAEstablished Series
TAXONOMIC CLASS: Coarse-loamy, isotic, mesic Andic Dystroxerepts
TYPICAL PEDON: Sadie gravelly ashy loam, forested. (Colors are for moist soil unless otherwise noted. All textures are apparent field textures.)
Oe--0 to 1 inch; moderately decomposed needles, leaves, and twigs.
A--1 to 5 inches; dark brown (7.5YR 3/4) gravelly ashy loam, brown (7.5YR 5/4) dry; weak very fine granular and weak fine and very fine subangular blocky structure; soft, friable, slightly sticky and slightly plastic and weakly smeary; common medium, and many fine and very fine roots; many fine and very fine irregular and tubular pores; 15 percent pebbles and 2 percent cobbles; very strongly acid (pH 4.6); clear smooth boundary. (4 to 8 inches thick)
Bw--5 to 20 inches; brown (7.5YR 4/4) gravelly ashy loam, light yellowish brown (10YR 6/4) dry; weak fine and very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic and weakly smeary; common medium, and many fine and very fine roots; many fine and very fine irregular and tubular pores; 15 percent pebbles and 2 percent cobbles; strongly acid (pH 5.2); clear smooth boundary. (15 to 20 inches thick)
BC--20 to 31 inches; dark yellowish brown (10YR 4/4) gravelly ashy loam, very pale brown (10YR 7/4) dry; common fine distinct dark yellowish brown (10YR 4/6) mottles, brownish yellow (10YR 6/6) dry; weak fine and very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic and weakly smeary; many fine and very fine roots; common fine and very fine irregular and tubular pores; 15 percent pebbles and 2 percent cobbles; strongly acid (pH 5.2); clear smooth boundary. (0 to 14 inches thick)
Cd1--31 to 45 inches; olive brown (2.5Y 4/4) dense glacial till that crushes to gravelly loam, pale yellow (2.5Y 7/4) dry; common medium distinct dark yellowish brown (10YR 4/6) and light brownish gray (10YR 6/2) mottles, brownish yellow (10YR 6/6) and very pale brown (10YR 8/2) dry; massive; very hard, very firm, slightly sticky and slightly plastic; very few fine and very fine roots in cracks; few very fine irregular and tubular pores; 15 percent pebbles and 2 percent cobbles; moderately acid (pH 5.6); clear smooth boundary. (7 to 29 inches thick)
Cd2--45 to 61 inches; olive brown (2.5Y 4/4) dense glacial till that crushes to gravelly loam, pale yellow (2.5Y 7/4) dry; common medium distinct dark yellowish brown (10YR 4/6) mottles;, brownish yellow (10YR 6/6) dry; massive; very hard, very firm, slightly sticky and slightly plastic; very few fine and very fine roots in cracks; few very fine irregular and tubular pores; 15 percent pebbles and 2 percent cobbles; moderately acid (pH 5.6).
TYPE LOCATION: Clallam County, Washington; 700 feet east and 200 feet north of the SW corner of section 25, T.31N., R.10W.
RANGE IN CHARACTERISTICS: Depth to the dense glacial till (densic contact) is 25 to 40 inches. The mean annual soil temperature is estimated to range from 49 to 51 degrees F. The soil is usually moist but is dry in the moisture control section for 45 to 60 consecutive days following the summer solstice. The particle size control section is 15 to 30 percent rock fragments that are mostly pebbles but some are cobbles. Apparent clay in the particle-size control section is less than 18 percent. Redox depletions with chroma of 2 or less are at depths greater than 30 inches.
The A horizon has value of 5 or 6 dry. It is strongly acid or very strongly acid.
The Bw horizon has hue of 7.5YR or 10YR, value of 6 or 7 dry, and chroma of 4 through 6 dry. This horizon is mottles in some pedons. It is strongly acid or moderately acid.
The BC horizon has value of 4 or 5 moist. It is strongly acid or moderately acid.
COMPETING SERIES: These are the Cathcart, Cathlamet, Chelan, Chuckanut, Giles, Nati, Nevat, Pastik, Ponto, Sehome, Squalicum, and Sulsavar series. Cathcart, Cathlamet, Chelan, Chuckanut, Giles, Nevat, Pastik, Ponto, and Sulsavar soils lack a paralithic contact within 40 inches. Nati soils are 20 to 40 inches deep to a paralithic contact with sandstone. Sehome soils are dry for 60 to 75 consecutive days.
GEOGRAPHIC SETTING: Sadie soils are on hills at elevations of 200 to 1,400 feet. They formed in ablation till over dense very compact glacial till. Slopes are 0 to 35 percent. These soils are in a mild marine climate and have cool, dry summers and cool, moist winters. The mean annual precipitation is 55 to 75 inches. The average January temperature is about 37 degrees F.; the average July temperature is about 60 degrees F.; and the mean annual temperature is about 48 degrees F. The frost free season is 160 to 190 days. The growing season (28 degrees F) is 210 to 250 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bellingham, Palix, Lyre, Semiahmoo, and Tealwhit soils. Bellingham and Tealwhit soils have an aquic moisture regime and a fine control section with less than 15 percent coarse fragments. Palix soils have an umbric epipedon and more than 35 percent soft rock fragments in the control section. Lyre soils are deep and loamy-skeletal. Semiahmoo soils are Histosols.
DRAINAGE AND PERMEABILITY: Moderately well drained; medium runoff; permeability is moderate above the paralithic contact and very slow within the compact till causing a perched water table during wet periods.
USE AND VEGETATION: Timber production is the principal use. Native vegetation is predominantly Douglas fir and western hemlock with some Sitka spruce, western red cedar, grand fir, and red alder. Understory species include salal, red huckleberry, elderberry, rose, blackberry, western swordfern, deer fern and bedstraw.
DISTRIBUTION AND EXTENT: Central Clallam County in northwestern Washington; MLRA 2. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Clallam County, Washington, 1943.
REMARKS: Diagnostic horizons and features recognized in this pedon are an ochric epipedon from the mineral surface to 4 inches, a cambic horizon from 4 to 30 inches, and dense glacial till at 30 inches. This series also qualifies for Oxyaquic.
ADDITIONAL DATA: National Soil Survey Laboratory, pedon numbers S78WA-9-2 and S78WA-9-3.