LOCATION BUTLERCREEK WA
Tentative Series
IRD. MGR/AJF/MPR
01/2025
BUTLERCREEK SERIES
Landscape--mountains
Landform--seeps or depressions on colluvial aprons or glacial valley walls
Slope--0 to 5 percent
Parent material--colluvium
Mean annual precipitation--about 2250 mm
Mean annual air temperature--about 10 degrees C
Depth class--very deep
Drainage class--somewhat poorly drained
Soil moisture regime--aquic
Soil temperature regime--mesic
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy-skeletal, isotic, acid, mesic Typic Humaquepts
TYPICAL PEDON: Butlercreek very gravelly loam on a northwest facing, forested depression on a colluvial apron with a slope of 5 percent and an elevation of 640 m. (The soil was moist throughout when described.)
Oi--0 to 6 cm; slightly decomposed plant material; abrupt smooth boundary
Oe--6 to 18 cm; moderately decomposed plant material; few medium and coarse and common very fine, fine, and very coarse roots; clear wavy boundary
A--18 to 29 cm; dusky red (2.5YR 3/2) dry, very dusky red (2.5YR 2/2) very gravelly loam; moderate medium subangular blocky structure; sightly hard, friable; common very fine, fine, medium, coarse, and very coarse roots; 25 percent gravel and 15 percent cobbles; very strongly acid (pH 4.7); clear wavy boundary
Bg1--29 to 50 cm; brown (7.5YR 4/3) dry, dark brown (7.5YR 3/3) very gravelly loam; moderate medium subangular blocky structure; soft, very friable; few very fine and common fine and medium roots; 5 percent distinct brown (10YR 5/3) iron depletions and 10 percent distinct strong brown (7.5YR 5/6) masses of oxidized iron; 30 percent gravel and 15 percent cobbles; very strongly acid (pH 4.9); clear wavy boundary
Bg2--50 to 150 cm; brown (7.5YR 4/3) dry, dark brown (7.5YR 3/3) very gravelly sandy loam; moderate medium subangular blocky structure; soft, very friable; few fine and medium roots; 5 percent distinct strong brown (7.5YR 5/6) masses of oxidized iron and 5 percent distinct brown (10YR 5/3) iron depletions; 25 percent gravel and 15 percent cobbles; very strongly acid (pH 4.9); clear smooth boundary
TYPE LOCATION: Clallam County, Washington; near Sol Duc Hot Springs in Olympic National Park
Latitude--47.9632153
Longitude-- -123.8649955
Datum--WGS84
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 13 degrees C
Umbric epipedon thickness--20 to 35 cm
Depth to redoximorphic features--25 to 50 cm below the mineral soil surface
Particle-size control section
*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
Oi and Oe horizons
Combined thickness--8 to 19 cm
A horizon
Hue--10YR or 2.5YR
Value--2 or 3 moist, 3 or 4 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--20 to 50 percent
Gravel content--15 to 40 percent
Cobble content--0 to 15 percent
Reaction--4.5 to 5.5
Thickness--10 to 20 cm
Bg1 and Bg2 horizons
Hue--10YR or 7.5YR
Value--3 to 5 moist, 4 to 6 dry
Chroma--2 to 3 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--115 to 130 cm
COMPETING SERIES:
Nowhere--have mica throughout and structureless C horizons
GEOGRAPHIC SETTING:
Elevation--300 to 800 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:
Irely--well drained, albic and spodic horizons, ochric epipedon; similar landforms
Mountdeception--well drained, andic subgroup properties, ochric epipedon; similar landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--somewhat poorly drained
Saturation in normal years--above the surface November through Februrary, seasonally high water table top depth of 25 to 50 cm March to April and 50 to 100 cm May through July; not saturated August through October
Flooding--none
Ponding--frequent, long
Saturated hydraulic conductivity (Ksat)--high or very high throughout
USE AND VEGETATION:
Use--wildlife habitat, recreation
Potential natural vegetation--western redcedar, western hemlock, salmonberry, devilsclub
DISTRIBUTION AND EXTENT: Olympic Mountains, Washington; MLRA 1; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Olympic National Park, Clallam County, Washington 2023; name from Butler creek in Olympic National Park
REMARKS:
Diagnostic horizons and other features in this pedon:
*Particle-size control section--zone from 43 to 118 cm
*Umbric epipedon--zone from 18 to 50 cm
*Aquic conditions--zone from 29 to 150 cm
*Redoximorphic features--zone from 29 to 150 cm*Cambic horizon--zone from 50 to 150 cm
National Cooperative Soil Survey
U.S.A.