LOCATION DAVISCREEK WA
Established Series
IRD. DRU/EED
06/2019
DAVISCREEK SERIES
Landscape--river valleys, outwash plains
Landform--outwash terraces
Slope--0 to 15 percent
Parent material--alluvium mixed with volcanic ash over glacial outwash
Mean annual precipitation--about 1500 mm
Mean annual air temperature--about 11 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--typic
TAXONOMIC CLASS: Medial-skeletal over sandy or sandy-skeletal, amorphic over isotic, mesic Typic Melanoxerands
TYPICAL PEDON: Daviscreek gravelly medial sandy loam in an area of pasture (When described on August 11, 2014, the soil was dry throughout.)
A1--0 to 18 cm; gravelly medial sandy loam, dark brown (7.5YR 3/2) dry, very dark brown (7.5YR 2.5/2) moist; strong fine granular structure; soft, very friable, nonsticky and nonplastic; weakly smeary; many very fine and few fine roots; common very fine tubular and common fine irregular pores; 25 percent gravel; strongly acid (pH 5.3); abrupt wavy boundary
A2--18 to 37 cm; very gravelly medial sandy loam, brown (7.5YR 4/4) dry, very dark brown (7.5YR 2.5/2) moist; moderate very fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; weakly smeary; many very fine and few fine roots; common very fine and fine tubular pores and few fine irregular pores; 50 percent gravel; strongly acid (pH 5.5); clear wavy boundary
Bw1--37 to 63 cm; extremely gravelly medial loam, brown (10YR 5/3) dry, dark brown (7.5YR 3/3) moist; moderate very fine subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; weakly smeary; common very fine and few fine and medium roots; common very fine and fine tubular pores and few fine irregular pores; 45 percent gravel and 20 percent cobbles; moderately acid (pH 5.8); clear wavy boundary
Bw2--63 to 81 cm; extremely gravelly medial loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 4/4) moist; weak fine subangular blocky structure; soft, friable, slightly sticky and nonplastic; weakly smeary; common very fine roots; common very fine interstitial and few very fine tubular pores; 60 percent gravel and 15 percent cobbles; moderately acid (pH 5.8); abrupt smooth boundary
2C--81 to 150 cm; extremely gravelly coarse sand, light yellowish brown (2.5Y 6/3) dry, olive brown (2.5Y 4/3) moist; single grain; loose, nonsticky and nonplastic; common very fine and fine interstitial pores; 75 percent gravel; moderately acid (pH 6.0)
TYPE LOCATION: Grays Harbor County, Washington, about 4.5 km northwest of Oakville and 90 m west of State Highway 12; about 515 m west and 190 m south of the northeast corner of section 14, T. 16 N., R. 5 W., Willamette Meridian; Malone, Washington, U.S. Geological Survey quadrangle; latitude 46.7953820 degrees north and longitude 123.0721110 degrees west, WGS 84 (coordinates determined with a GPS)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--10 to 12 degrees C
Soil moisture control section--dry 60 to 75 days following summer solstice
Thickness of melanic epipedon--30 to 50 cm
Thickness of umbric epipedon--50 to 75 cm
Sodium fluoride pH--higher than 10
Ratio of clay to 1500 kPa water--higher than 0.8
Andic soil properties
*Thickness--60 to 85 cm
*Content of coarse silt to very coarse sand in fine-earth fraction--30 percent or more
*Phosphate retention--35 to 95 percent
*Ammonium oxalate extractable Al plus 1/2 Fe--1 to 3 percent
*Volcanic glass content--5 to 30 percent
*1/3-bar bulk density--0.80 to 0.95 g/cm3
*Ammonium oxalate extractable Al plus 1/2 Fe times 15.625 plus volcanic glass--40 to 60 percent
A1 horizon
Hue--7.5YR, 10YR
Value--2 or 2.5 moist, 2 or 3 dry
Chroma--1 or 2 moist
Organic carbon content--6 to 9 percent
Melanic index--less than 1.70
Fine-earth texture--sandy loam, loam
Clay content--10 to 20 percent
Gravel content--10 to 30 percent
Reaction (pH)--5.1 to 6.0
Thickness--15 to 30 cm
A2 horizon (where present)
Hue--7.5YR, 10YR
Value--2 or 2.5 moist, 2 to 4 dry
Chroma--1 or 2 moist, 2 to 4 dry
Organic carbon content--6 to 9 percent
Melanic index--less than 1.7
Fine-earth texture--sandy loam, loam
Clay content--10 to 18 percent
Total rock fragment content--15 to 55 percent
Gravel content--15 to 55 percent
Cobble content--0 to 10 percent
Reaction (pH)--5.1 to 6.5
Thickness--15 to 25 cm
Bw horizon
Hue--10YR, 7.5YR
Value--3 or 4 moist, 3 to 5 dry
Chroma--2 to 4 moist, 3 or 4 dry
Fine-earth texture--loam, sandy loam
Clay content--5 to 18 percent
Total rock fragment content--40 to 85 percent
Gravel content--35 to 80 percent
Cobble content--0 to 25 percent
Reaction (pH)--5.1 to 6.5
Combined thickness--15 to 45 cm
2C horizon
Hue--2.5Y, 10YR, 7.5YR
Value--3 or 4 moist, 3 to 6 dry
Chroma--3 or 4 moist or dry
Fine-earth texture--coarse sand, loamy sand
Clay content--0 to 10 percent
Sand content--80 to 100 percent
Total rock fragment content--65 to 85 percent
Gravel content--50 to 80 percent
Cobble content--0 to 25 percent
Reaction (pH)--5.6 to 7.3
COMPETING SERIES: None
GEOGRAPHIC SETTING:
Elevation--5 to 55 m
Mean annual precipitation--1200 to 1800 mm
Mean annual air temperature--10 to 11 degrees C
Frost-free period--150 to 200 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Gate--aquic conditions at a depth of 75 to 100 cm from the soil surface; in convex to linear positions of alluvial fans and terraces
Eld--18 to 35 percent clay in particle-size control section; occasionally flooded; in slightly convex to linear positions of flood plains lower on the landscape
Grandmound--no andic soil properties; in convex to linear positions of similar landforms
Huttula--aquic conditions at a depth of 30 to 50 cm from the soil surface; occasionally flooded; in concave to linear positions of similar landforms
Nemah--aquic conditions to the soil surface; frequently flooded; frequently ponded; in concave depressions
Roundtree--aquic conditions to the soil surface; frequently flooded and ponded; in concave depressions and overflow stream channels
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Flooding--very rare in November through March
Saturated hydraulic conductivity (Ksat)--high in A and Bw horizons, very high in 2C horizon
USE AND VEGETATION:
Use--hay production, livestock grazing, and development in cleared areas; wildlife habitat
Native vegetation--Douglas-fir, lodgepole pine, Oregon white oak, red alder, common snowberry, beaked hazelnut, salal, oceanspray, tall Oregon grape, Cascade Oregon grape, trailing blackberry, western swordfern, brackenfern
DISTRIBUTION AND EXTENT: Western Washington; MLRA 2; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Grays Harbor County, Washington; 2017
REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from the surface to a depth of 100 cm
*Melanic epipedon--zone from the surface to a depth of 37 cm
*Umbric epipedon--zone from the surface to a depth of 63 cm
*Andic soil properties--zone from the surface to a depth of 81 cm
*Cambic horizon--zone from 63 to 81 cm
*Depth to lithologic discontinuity--81 cm
10/2016--The Daviscreek series was established as part of an update project. The official series description was developed according to SSR01 Technical Note--Content and Format of Official Series Descriptions (revised 12/2015). Further field investigation and laboratory sampling in glacially modified river valleys and on outwash plains of MLRA 2 is needed to determine the distribution of soils that have a melanic epipedon and an influence of volcanic ash.
National Cooperative Soil Survey
U.S.A.