LOCATION DUNGENESS WAEstablished Series
TAXONOMIC CLASS: Coarse-silty, isotic, nonacid, mesic Vitrandic Xerofluvents
TYPICAL PEDON: Dungeness silt loam - pasture. (Colors are for moist soil unless otherwise noted. All textures are apparent field textures.)
Ap--0 to 8 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR 5/2) dry; moderate fine and very fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many fine and very fine roots; many fine and very fine irregular and tubular pores; neutral (pH 6.6); abrupt smooth boundary. (6 to 9 inches thick)
C1--8 to 12 inches; finely stratified very dark grayish brown (10YR 3/2 and 2.5Y 3/2) silt loam grayish brown (10YR 5/2) and light brownish gray (10YR 6/2) dry; massive; slightly hard, friable, slightly sticky and slightly plastic; many fine and very fine roots; many fine and very fine tubular and irregular pores; thin bedding planes visible; neutral (pH 6.7); clear smooth boundary. (0 to 8 inches thick)
C2--12 to 20 inches; dark grayish brown (2.5Y 4/2) very fine sandy loam, light brownish gray (2.5Y 6/2) dry; massive; soft, very friable, nonsticky and nonplastic; many very fine roots; many fine and very fine tubular and irregular pores; thin bedding planes visible; neutral (pH 6.7); abrupt smooth boundary. (6 to 12 inches thick)
C3--20 to 30 inches; dark grayish brown (10YR 4/2) silt loam, light brownish gray (10YR 6/2) dry; weak fine subangular blocky structure; very hard, firm, sticky and plastic; common very fine roots; common fine and very fine tubular and irregular pores; very dark brown (10YR 2/2) organic stains on some faces of peds and in some pores; neutral (pH 6.8); clear wavy boundary. (8 to 15 inches thick)
C4--30 to 42 inches; dark grayish brown (2.5Y 4/2) stratified 2 to 3 inch thick layers of silt loam, very fine sandy loam, and silty clay loam; light brownish gray (2.5Y 6/2) dry; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and plastic; few very fine roots; common fine and very fine tubular and irregular pores; neutral (pH 6.9); clear wavy boundary. (8 to 16 inches thick)
C5--42 to 50 inches; dark grayish brown (2.5Y 4/2) very fine sandy loam, light brownish gray (2.5Y 6/2) dry; massive; slightly hard, friable, nonsticky and slightly plastic; few very fine roots; many very fine irregular pores; 3 percent fine pebbles; neutral (pH 6.9); clear smooth boundary. (6 to 12 inches thick)
C6--50 to 56 inches; olive gray (5Y 4/2) fine sandy loam, light olive gray (5Y 6/2) dry; massive; soft, very friable, nonsticky and nonplastic; many very fine irregular pores; 3 percent fine pebbles; neutral (pH 7.0); clear smooth boundary. (0 to 10 inches thick)
IIC7--56 to 60 inches; olive gray (5Y 4/2) fine and medium sand; light olive gray (5Y 6/2) dry; single grained; loose, nonsticky and nonplastic; many very fine irregular pores; 15 percent pebbles; neutral (pH 7.2); several feet thick.
TYPE LOCATION: Clallam County, Washington; 1,200 feet west and 600 feet north of the southeast corner of section 14, T. 30 N., R. 4 W.
RANGE IN CHARACTERISTICS: The particle-size control section contains 0 to 2 percent fine pebbles. The mean annual soil temperature is estimated to range from 50 degrees to 53 degrees F. The soil is dry in the moisture control section for 60 to 75 consecutive days following summer solstice.
The A horizon has hue of 10YR or 2.5Y and chroma of 2 or 3. It is slightly acid or neutral. This horizon is stratified unless stratifications have been destroyed by tilling.
The C horizon has lithochromic hue of 10YR, 2.5Y, or 5Y, value of 4 or 5 moist, 5 through 7 dry, and chroma of 2 through 4. Above 40 inches, it is mostly stratified very fine sandy loam, and silt loam with thin strata of fine sandy loam or silty clay loam. Below 40 inches, it is coarsely stratified silt loam to coarse sand with from 0 to 15 percent pebbles. It is slightly acid or neutral.
COMPETING SERIES: This is the closely related Newruss series. Newruss soils are coarse-loamy.
GEOGRAPHIC SETTING: Dungeness soils are on bottomlands and low river terraces at elevations of 25 to 300 feet. Slopes are 0 to 5 percent. These soils formed in alluvium. The climate is characterized by cool, dry summers and cool, moist winters. Mean annual precipitation is 17 to 25 inches. Average January temperature is 38 degrees F., average July temperature is 60 degrees F., and the mean annual temperature is 49 degrees F. The frost-free season is 170 to 200 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Agnew, Carlsborg, Hoypus, Lummi, Puget, and Sequim soils. Agnew soils have an argillic horizon and are fine-loamy. Carlsborg, Hoypus, and Sequim soils are sandy-skeletal. Lummi soils have an aquic moisture regime and have a mollic epipedon 10 to 20 inches thick. Puget soils have an aquic moisture regime.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderate permeability.
USE AND VEGETATION: Crop production, pasture and homesites are the principal uses. Most of the Dungeness soils have been cleared. Many areas are irrigated. Crops include hay, barley, strawberries, raspberries, green peas, mint oil, and pasture.
DISTRIBUTION AND EXTENT: Eastern Clallam County, Washington. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Clallam County, Washington, 1910.
REMARKS: Classification only changed 4/94 because of recent amendments to Soil Taxonomy.