LOCATION GATE WA
Established Series
IRD. DRU/EED
07/2017
GATE SERIES
Landscape--river valleys
Landform--alluvial fans, terraces
Slope--0 to 20 percent
Parent material--alluvium
Mean annual precipitation--about 1500 mm
Mean annual air temperature--about 11 degrees C
Depth class--very deep
Drainage class--moderately well drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--oxyaquic
TAXONOMIC CLASS: Fine-silty, isotic, mesic Vitrandic Palexeralfs
TYPICAL PEDON: Gate silty clay loam, forested (When described on August 28, 2014, the soil was moist throughout.)
Oi--0 to 3 cm; slightly decomposed plant material; abrupt smooth boundary
A1--3 to 10 cm; silty clay loam, very dark brown (7.5YR 2.5/2) moist, dark brown (7.5YR 3/3) dry; strong medium granular structure; slightly hard, very friable, slightly sticky and moderately plastic; common very fine and fine roots; many very fine and few fine tubular pores and few medium irregular pores; strongly acid (pH 5.4); abrupt wavy boundary
A2--10 to 34 cm; silty clay loam, dark brown (7.5YR 3/2) moist, brown (7.5YR 4/3) dry; strong very fine subangular blocky structure; slightly hard, very friable, slightly sticky and moderately plastic; common very fine and few very coarse roots; many very fine and few fine tubular pores and few medium irregular pores; strongly acid (pH 5.4); clear wavy boundary
AB--34 to 44 cm; silt loam, dark brown (7.5YR 3/3) moist, brown (7.5YR 4/4) dry; strong very fine subangular blocky structure; slightly hard, friable, slightly sticky and moderately plastic; few very fine and fine and common medium roots; many very fine and few fine tubular pores; moderately acid (pH 5.8); abrupt smooth boundary
Bt--44 to 90 cm; silt loam, brown (7.5YR 4/4) moist, light brown (7.5YR 6/4) dry; strong very fine subangular blocky structure; slightly hard, friable, slightly sticky and moderately plastic; few very fine, fine, and medium roots; many very fine and few fine and medium tubular pores; 10 percent faint clay films on vertical faces of peds; moderately acid (pH 6.0); clear wavy boundary
Btg--90 to 150 cm; silty clay loam, brown (7.5YR 4/4) moist, light brown (7.5YR 6/4) dry; moderate very fine subangular blocky structure; moderately hard, friable, slightly sticky and moderately plastic; few very fine roots; few fine tubular pores; 10 percent faint clay films on vertical faces of peds; 5 percent medium distinct gray (7.5YR 6/1) iron depletions lining pores, 5 percent medium faint strong brown (7.5YR 4/6) masses of oxidized iron, and 5 percent medium distinct dark reddish brown (5YR 3/4) iron-manganese masses in matrix; moderately acid (pH 6.0)
TYPE LOCATION: Grays Harbor County, Washington, about 2.5 km southwest of Porter and 215 m north of Russell Road; about 540 m west and 185 m south of the northeast corner of section 32, T. 17 N., R. 5 W., Willamette Meridian; Malone, Washington, U.S. Geological Survey quadrangle; latitude 46.9233250 degrees north, longitude 123.3342133 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 45 to 60 days following summer solstice
Umbric epipedon thickness--25 to 80 cm
Argillic horizon thickness--70 to 125 cm or more
Base saturation by sum of cations--more than 35 percent throughout argillic horizon
Depth to aquic conditions--75 to 100 cm
Rock fragment content--0 to 10 percent gravel
All mineral horizons
*Content of coarse silt to very coarse sand in fine-earth fraction--30 percent or more
*Ammonium oxalate extractable Al plus 1/2 Fe times 60 plus volcanic glass--30 or more
*Volcanic glass content--5 to 15 percent
*1/3-bar bulk density--greater than 1.0 g/cm3
*Reaction (pH)--5.1 to 6.5
Particle-size control section
*Clay content (weighted average)--18 to 35 percent
*Sand content--0 to 15 percent
A horizon
Hue--7.5YR, 10YR
Value--2, 2.5, or 3 moist, 2.5 to 4 dry
Chroma--1 or 2 moist, 2 or 3 dry
Fine-earth texture--silty clay loam, silt loam
Clay content--18 to 35 percent
Combined thickness--25 to 55 cm
AB horizon
Hue--7.5YR, 10YR
Value--2, 2.5, or 3 moist, 2.5 to 4 dry
Chroma--2 or 3 moist, 3 or 4 dry
Fine-earth texture--silt loam, silty clay loam
Clay content--18 to 35 percent
Thickness--10 to 25 cm
Bt horizon
Hue--7.5YR, 10YR
Value--3 or 4 moist, 4 to 6 dry
Fine-earth texture--silt loam, silt clay loam
Clay content--18 to 35 percent
Thickness--15-50 cm
Btg horizon
Hue--7.5YR, 10YR
Value--3 or 4 moist, 4 to 6 dry
Chroma--2 to 4 moist, 4 or 6 dry
Fine-earth texture--silty clay loam, silt loam, silty clay
Clay content--18 to 50 percent
COMPETING SERIES: None
GEOGRAPHIC SETTING:
Elevation--5 to 45 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:
Rony--aquic conditions at a depth of 30 to 50 cm from the soil surface; in concave to linear positions of similar landforms
Delezene--less than 18 percent clay in particle-size control section; no aquic conditions within 100 cm of the soil surface; in convex to linear positions of outwash terraces
Centralia--greater than 15 percent sand in particle-size control section; no aquic conditions; on convex hillslopes
Rennie--aquic conditions to the soil surface; frequently flooded; frequently ponded; in concave depressions and backswamps
Grandmound--greater than 35 percent rock fragments in particle-size control section; in convex to linear positions of outwash terraces
Huttula--aquic conditions at a depth of 30 to 50 cm from the soil surface; occasionally flooded; in concave to linear positions of outwash terraces
Daviscreek--andic soil properties; in convex to linear positions of outwash terraces
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--moderately well drained
Depth to apparent seasonal water table--70 to 100 cm at times in November through March
Saturated hydraulic conductivity (Ksat)--moderately high or high in A, AB, and Bw horizons, moderately low to moderately high in Btg horizon
USE AND VEGETATION:
Use--forest production, hay production, and livestock grazing in cleared areas; wildlife habitat
Native vegetation--Douglas-fir, western hemlock, western redcedar, bigleaf maple, red alder, salmonberry, common snowberry, salal, beaked hazelnut, red elderberry, red huckleberry, western swordfern, white insideout flower
DISTRIBUTION AND EXTENT: Western Washington; MLRA 2; small extent
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Grays Harbor County, Washington; 2016; name from Gate, Washington
REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 44 to 94 cm
*Umbric epipedon--zone from 3 to 44 cm
*Argillic horizon--zone from 44 to 150 cm
*Aquic conditions--zone from 90 to 150 cm
*Redoximorphic depletions with chroma of 2 or less--zone from 90 to 150 cm
4/2017--The Gate series was proposed as a result 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 of the alluvial fans and terraces at the interface of the hills and lowlands in MLRA 2 is recommended.
National Cooperative Soil Survey
U.S.A.