LOCATION HUNGRYCREEK WA
Tentative Series
IRD. MGR/AJF/MPR
01/2025
HUNGRYCREEK SERIES
Landscape--mountains
Landform--glacial valley walls
Slope--0 to 100 percent
Parent material--colluvium from metasedimentary rock
Mean annual precipitation--about 3500 mm
Mean annual air temperature--about 2 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy-skeletal, isotic Andic Dystrocryepts
TYPICAL PEDON: Hungrycreek gravelly silt loam on a northwest-facing, forested glacial valley wall with a slope of 65 percent and an elevation of 1400 m. (The soil was moist throughout when described.)
Oi--0 to 3 cm; slightly decomposed plant material; abrupt wavy boundary
A1--3 to 12 cm; brown (10YR 4/3) dry, very dark grayish brown (10YR 3/2) gravelly silt loam; moderate fine subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; weakly smeary; common very fine and few fine, medium, and coarse roots; common very fine and fine irregular and few very fine and fine tubular pores; 15 percent gravel; very strongly acid (pH 4.6); abrupt smooth boundary
A2--12 to 35 cm; brown (10YR 4/3) dry, very dark brown (10YR 2/2) gravelly silt loam; moderate fine subangular blocky structure; soft, very friable, slightly sticky, moderately plastic; moderately smeary; few very fine, fine, medium, and coarse roots; common very fine and fine irregular and few very fine and fine tubular pores; 20 percent gravel; very strongly acid (pH 4.7); clear smooth boundary
Bw1--35 to 58 cm; yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) very gravelly loam; moderate medium subangular blocky structure; soft, very friable, moderately sticky, moderately plastic; moderately smeary; few fine and medium roots; common fine irregular and few fine interstitial pores; 40 percent gravel; very strongly acid (pH 4.8); clear smooth boundary
Bw2--58 to 150 cm; yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 4/4) very gravelly loam; weak very fine subangular blocky structure; soft, very friable, moderately sticky, moderately plastic; few fine and medium roots; few fine interstitial pores; 55 percent gravel; very strongly acid (pH 4.8); clear smooth boundary
TYPE LOCATION: Clallam County, Washington; near Happylake trail junction in Olympic National Park
Latitude--48.0066620
Longitude-- -123.6642470
Datum--WGS84
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--0 to 3 degrees C
Particle-size control section
*Clay content--8 to 18 percent
*Total rock fragment content--35 to 60 percent
*Gravel content--35 to 60 percent
*Cobble content--0 to 20 percent
*Stone content--0 to 15 percent
Oi horizon
Thickness--0 to 5 cm
A1 and A2 horizons
Value--2 to 4 dry or moist
Chroma--2 to 4 dry or moist
Fine-earth texture--silt loam, loam, sandy loam
Clay content--8 to 18 percent
Total rock fragment content--10 to 40 percent
Gravel content--10 to 35 percent
Cobble content--0 to 15 percent
Reaction--4.5 to 5.5
Combined thickness--25 to 40 cm
Bw1 and Bw2 horizons
Value--3 to 6 dry or moist
Chroma--3 or 4 dry or moist
Fine-earth texture--silt loam, loam, sandy loam
Clay content--8 to 18 percent
Total rock fragment content--35 to 60 percent
Gravel content--35 to 60 percent
Cobble content--0 to 20 percent
Stone content--0 to 15 percent
Reaction--4.5 to 5.5
Combined thickness--more than 100 cm
COMPETING SERIES:
Angelbasin,
Prouty,
Smokejump, and
Venson-- have a mantle of tephra with volcanic glass in the fine earth fraction
Skinwood--mean annual soil temperature is 6 to 7 degrees
McCay--paralithic contact within 100 to 150 cm of the soil surface
Tepeh--mean annual soil temperature is 4 to 8 degrees C
Twentymile--has dense horizons starting at 85 cm
Mountmystery--mean annual soil temperature is 4 to 7 degrees C
Hangingglacier and
Elklick --lithic contact within 50 to 100 cm of the soil surface
GEOGRAPHIC SETTING:
Elevation--1300 to 1800 m
Climate--cool, dry summers; cold, wet winters
Mean annual precipitation--3000 to 4000 mm
Mean annual air temperature--0 to 4 degrees C
Frost-free period--30 to 60 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Nonamecreek--albic and spodic horizons; similar landforms
Lakedilly--aquic conditions within 25 to 50 cm of the mineral soil surface; depressions on similar landforms
Allincreek--lithic contact within 25 to 50 cm; umbric epipedon; similar landforms
Lollah--umbric epipedon; similar landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturation in normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high or very high throughout
USE AND VEGETATION:
Use--wildlife habitat, recreation
Potential natural vegetation--Mountain hemlock, Alaska cedar, pink mountain heather, black huckleberry, common beargrass, white avalanche-lily
DISTRIBUTION AND EXTENT: Olympic Mountains, Washington; MLRA 1; moderate extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Olympic National Park, Clallam County, Washington 2023; name from Hungry creek in Olympic National Park
REMARKS:
Diagnostic horizons and other features in this pedon:
*Particle-size control section--zone from 28 to 103 cm
*Ochric epipedon
*Andic subgroup feature--zone from 3 to 35 cm; AO extractable Al plus Fe is 1 to 2 percent and Db is 0.9 to 1.0 g/cm3
*Cambic horizon--zone from 35 to 150 cm
National Cooperative Soil Survey
U.S.A.