LOCATION ALLINCREEK              WA

Tentative Series
IRD. MGR/AJF/MPR
01/2025

ALLINCREEK SERIES

Landscape--mountains
Landform--ridges, summits, and structural benches
Slope--0 to 100 percent
Parent material--residuum
Mean annual precipitation--about 3000 mm
Mean annual air temperature--about 4 degrees C
Depth class--shallow
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic

TAXONOMIC CLASS: Loamy-skeletal, isotic Lithic Humicryepts

TYPICAL PEDON: Allincreek very gravelly silt loam on a southwest facing, non-forested ridge with a slope of 15 percent and an elevation of 1550 m. (The soil was moist throughout when described.)

A--0 to 10 cm; grayish brown (10YR 5/2) dry, very dark brown (10YR 2/2) very gravelly silt loam; moderate very fine granular structure; soft, very friable, slightly sticky, slightly plastic; weakly smeary; many very fine and fine and common medium roots; common very fine irregular and few fine interstitial pores; 40 percent gravel; very strongly acid (pH 4.6); abrupt wavy boundary

Bw--10 to 28 cm; brown (10YR 5/3) dry, very dark grayish brown (10YR 3/2) very gravelly silt loam; weak very fine subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; weakly smeary; many very fine and common fine roots; few very fine and fine irregular pores; 45 percent gravel; very strongly acid (pH 4.7); abrupt wavy boundary

R--28 cm; bedrock

TYPE LOCATION: Clallam County, Washington; near High Divide in Olympic National Park
Latitude--47.9072090
Longitude-- -123.7246910
Datum--WGS84

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--0 to 7 degrees C
Umbric epipedon thickness--18 to 30 cm
Depth to restrictive layer--25 to 50 cm

Particle-size control section
*Clay content--8 to 18 percent
*Total rock fragment content--35 to 50 percent
*Gravel content--15 to 50 percent
*Cobble content--0 to 20 percent
*Stone content--0 to 15 percent

A horizon
Value--4 or 5 dry, 2 or 3 moist
Chroma--2 or 3 dry or moist
Fine-earth texture--silt loam, loam, sandy loam
Reaction--4.5 to 5.5
Thickness--5 to 15 cm

Bw horizon
Value--4 to 6 dry, 3 or 4 moist
Chroma--2 to 4 dry or moist
Fine-earth texture--silt loam, loam, sandy loam
Reaction--4.5 to 5.5
Thickness--15 to 25 cm

COMPETING SERIES:
Burgerbutte, Crawfish, Eastlakebasin-- have a mantle of tephra with volcanic glass in the fine earth fraction
Goodnews--Bw2 horizon pH ranges from 5.5 to 6.6
Snowtell--has a xeric soil moisture regime
Telluride--Bw horizons contains 50 to 85 percent total rock fragments
Toik--A horizon contains less than 30% rock fragments and less than 8 percent clay

GEOGRAPHIC SETTING:
Elevation--900 to 1900 m
Climate--cool, dry summers; cold, wet winters
Mean annual precipitation--1500 to 4000 mm
Mean annual air temperature--0 to 6 degrees C
Frost-free period--30 to 90 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Mountmystery and Hungrycreek--no lithic contact, andic soil properties; similar landforms
Ignarcreek and Nonamecreek--no lithic contact, albic and spodic horizons, andic soil properties; similar landforms
Ringlake--no lithic contact within 150 cm of the soil surface, aquic conditions within 0 to 25 cm of mineral soil surface; depressions on 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--pink mountain heather, Cascade huckleberry, broadleaf lupine, partridgefoot, showy sedge; dry sites may include common juniper, spreading phlox, common yarrow, Roemer's fescue

DISTRIBUTION AND EXTENT: Olympic Mountains, Washington; MLRA 1; large extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana

SERIES PROPOSED: Olympic National Park, Clallam County, Washington 2023; name from All-In creek in Olympic National Park

REMARKS:
Diagnostic horizons and other features in this pedon:
*Particle-size control section--zone from 0 to 28 cm
*Umbric epipedon--zone from 0 to 28 cm
* Lithic contact--28 cm

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National Cooperative Soil Survey
U.S.A.