LOCATION STUKEY WA
Tentative Series
IRD. AJF/MGR/MPR
01/2025
STUKEY SERIES
Landscape--river valleys
Landform--alluvial terrace
Slope--0 to 15 percent
Parent material--alluvium
Mean annual precipitation--about 2250 mm
Mean annual air temperature--about 10 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--mesic
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy-skeletal, mixed, active, mesic Typic Dystrudepts
TYPICAL PEDON: Stukey loam on a forested alluvial terrace with a slope of 1 percent and an elevation of 430 m. (The soil was moist throughout when described.)
Oi--0 to 3 cm; slightly decomposed plant material; abrupt wavy boundary
Oe--3 to 6 cm; moderately decomposed plant material; abrupt wavy boundary
A--6 to 11 cm; gray (10YR 5/1) dry, dark grayish brown (10YR 4/2) loam; weak fine granular structure; soft, very friable, slightly sticky, slightly plastic; few coarse and very coarse and common very fine and fine roots; few very fine tubular and common very fine irregular pores; 10 percent gravel; very strongly acid (pH 4.6); abrupt wavy boundary
Bw1--11 to 28 cm; pale yellow (2.5Y 7/3) dry, light olive brown (2.5Y 5/3) very gravelly loam; moderate very fine subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; few coarse and very coarse and common very fine, fine, and medium roots; common very fine irregular and interstitial pores; 40 percent gravel; very strongly acid (pH 4.7); clear smooth boundary
Bw2--28 to 58 cm; light olive brown (2.5Y 5/3) dry, dark grayish brown (2.5Y 4/2) very gravelly sandy loam; weak very fine subangular blocky structure; soft, very friable; few very fine, fine, medium, coarse, and very coarse roots; few fine and medium interstitial and common very fine irregular pores; 50 percent gravel; very strongly acid (pH 4.8); clear smooth boundary
Bw3--58 to 150 cm; light olive brown (2.5Y 5/3) dry, olive brown (2.5Y 4/3) very gravelly sandy loam; weak very fine subangular blocky structure; soft, very friable; few very fine, fine, and very coarse roots; few very fine irregular and common fine and medium interstitial pores; 50 percent gravel and 5 percent cobbles; very strongly acid (pH 4.9); clear smooth boundary
TYPE LOCATION: Jefferson County, Washington; Elwha river valley about a half mile south of Elkhorn in Olympic National Park.
Latitude-- 47.8632440
Longitude-- -123.4679430
Datum--WGS84
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 13 degrees C
Particle-size control section
*Clay content--7 to 17 percent
*Total rock fragment content--35 to 65 percent
*Gravel content--15 to 50 percent
*Cobble content--0 to 40 percent
*Stone content--0 to 20 percent
Oi and Oe horizons
Combined thickness--2 to 8 cm
A horizon
Value--2 to 4 moist, 3 to 5 dry
Chroma--1 to 3, moist or dry
Fine-earth texture--silt loam, loam, or sandy loam
Clay content--7 to 17 percent
Total rock fragment content--0 to 40 percent
Gravel content--0 to 40 percent
Cobble content--0 to 20 percent
Reaction--4.5 to 5.5
Thickness--4 to 15 cm
Bw1 horizon
Hue--10YR or 2.5Y
Value--4 or 5 moist, 5 to 7 dry
Chroma--2 to 4, moist or dry
Fine-earth texture--silt loam, loam, or sandy loam
Clay content-- 7 to 17 percent
Total rock fragment content--35 to 60 percent
Gravel content--15 to 50 percent
Cobble content--0 to 40 percent
Stone content--0 to 20 percent
Reaction--4.5 to 5.5
Thickness--15 to 30 cm
Bw2 and Bw3 horizons
Hue--10YR or 2.5Y
Value--4 or 5 moist, 5 to 7 dry
Chroma--2 to 4, moist or dry
Fine-earth texture--silt loam, loam, or sandy loam
Clay content-- 7 to 17 percent
Total rock fragment content--35 to 60 percent
Gravel content--15 to 50 percent
Cobble content--0 to 40 percent
Stone content--0 to 20 percent
Reaction--4.5 to 5.5
Combined thickness--120 to 140 cm
COMPETING SERIES:
Berks,
Brownstown,
Calvin,
Judyville,
Manlius,
Matewan,
Nailkeg,
Peaks,
Sylco--lithic contact within 50 to 100 cm of the mineral soil surface
Blasdell,
Brownsville,
Cadosia,
Highsplint,
Warwick--contains flat rock fragments
Wyoming--lower part of the control section has a loose consistence
Chiswell--paralithic contact within 25 to 50 cm of the mineral soil surface
Jubin--contains boulders in the particle size control section and channers and flagstones throughout
Keyesville,
Lippitt--paralithic contact within 100 cm of mineral soil surface
Solon--lithic contact within 50 to 150 cm of the mineral soil surface
GEOGRAPHIC SETTING:
Elevation--200 to 550 m
Climate--warm, dry summers; mild, wet winters
Mean annual precipitation--1750 to 2750 mm
Mean annual air temperature--8 to 12 degrees C
Frost-free period--180 to 240 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Haydenpass--particle-size control section is coarse-loamy; similar landforms
Happylake--aquic conditions within 25 to 50 cm of the mineral soil surface; depressions on similar landforms
Fourstream--no cambic horizon; similar landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturation in normal years--none
Flooding--very rare
Ponding--none
Saturated hydraulic conductivity (Ksat)--high or very high throughout
USE AND VEGETATION:
Use--wildlife habitat, recreation
Potential natural vegetation-- western hemlock, Douglas-fir, vine maple, salmonberry, red huckleberry, western swordfern, common ladyfern, twinflower, Pacific trillium, and youth on age
DISTRIBUTION AND EXTENT: Olympic Mountains, Washington; MLRA 1; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Olympic National Park, Jefferson County, Washington 2023; name from Stukey creek in Olympic National Park
REMARKS:
Diagnostic horizons and other features in this pedon:
*Particle-size control section--zone from 31 to 106 cm
*Ochric epipedon
*Cambic horizon--zone from 11 to 150 cm
National Cooperative Soil Survey
U.S.A.