LOCATION HAPPYLAKE WA
Tentative Series
IRD. MGR/AJF/MPR
01/2025
HAPPYLAKE SERIES
Landscape--river valley
Landform--depression on alluvial terraces
Slope--0 to 10 percent
Parent material--alluvium
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: Coarse-loamy, mixed, active, acid, mesic Typic Humaquepts
TYPICAL PEDON: Happylake silt loam on a forested alluvial terrace with a slope of 1 percent and an elevation of 385 m. (The soil was moist throughout when described.)
Oe--0 to 3 cm; moderately decomposed plant material; abrupt smooth boundary
A--3 to 24 cm; very dark grayish brown (10YR 3/2) dry, black (10YR 2/1) silt loam; moderate medium granular structure; soft, very friable, slightly sticky, moderately plastic; moderately smeary; few very fine and common fine and medium roots; common fine irregular and medium tubular pores; very strongly acid (pH 4.6); clear smooth boundary
Bw--24 to 42 cm; dark grayish brown (10YR 4/2) dry, very dark grayish brown (10YR 3/2) silt loam; weak fine subangular blocky structure; soft, very friable, slightly plastic; weakly smeary; few very fine and fine and common medium roots; common medium tubular and few fine irregular pores; very strongly acid (pH 4.7); abrupt smooth boundary
Bg1--42 to 55 cm; grayish brown (10YR 5/2) dry, dark grayish brown (10YR 4/2) silt loam; moderate medium subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; few fine, medium, and coarse roots; few fine irregular pores; 10 percent prominent strong brown (7.5YR 4/6) masses of oxidized iron and 15 percent faint gray (10YR 5/1) iron depletions; very strongly acid (pH 4.7); abrupt smooth boundary
Bg2--55 to 150 cm; greenish gray (10Y 6/1) dry, greenish gray (10Y 5/1) silt loam; strong medium subangular blocky structure; moderately hard, firm, moderately sticky, moderately plastic; few medium roots; few fine irregular pores; 5 percent dark yellowish brown (10YR 4/6) masses of oxidized iron; very strongly acid (pH 4.8); clear smooth boundary
TYPE LOCATION: Jefferson County, Washington; Duckabush trail about halfway between 5 mile and 10 mile camp in Olympic National Park.
Latitude--47.6892370
Longitude-- -123.1623160
Datum--WGS84
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 13 degrees C
Umbric epipedon thickness--18 to 25 cm
Depth to redoximorphic features--25 to 50 cm below the mineral soil surface
Particle-size control section
*Clay content--8 to 17 percent
*Total rock fragment content--0 to 25 percent
*Gravel content--0 to 25 percent
*Cobble content--0 to 10 percent
Oe horizon
Thickness--2 to 8 cm
A horizon
Value--2 or 3 moist, 3 or 4 dry
Chroma--1 or 2 moist or dry
Fine-earth texture--silt loam, loam, or sandy loam
Clay content--8 to 17 percent
Total rock fragment content--0 to 25 percent
Gravel content--0 to 25 percent
Cobble content--0 to 10 percent
Reaction--4.5 to 5.5
Thickness--18 to 30 cm
Bw horizon
Value--2 or 3 moist, 3 or 4 dry
Chroma--2 or 3 moist or dry
Fine-earth texture--silt loam, loam, or sandy loam
Clay content--8 to 17 percent
Total rock fragment content--0 to 25 percent
Gravel content--0 to 25 percent
Cobble content--0 to 10 percent
Reaction--4.5 to 5.5
Thickness--15 to 30 cm
Bg1 horizon
Hue--10YR or 10Y
Value--4 or 5 moist, 5 or 6 dry
Chroma--1 or 2, moist or dry
Fine-earth texture--silt loam, loam, or sandy loam
Clay content--8 to 17 percent
Total rock fragment content--0 to 25 percent
Gravel content--0 to 25 percent
Cobble content--0 to 10 percent
Reaction--4.5 to 5.5
Thickness--10 to 25 cm
Bg2 horizon
Hue--10YR, 10Y, or N
Value--5 to 7 moist or dry
Chroma--0 or 1, moist or dry
Fine-earth texture--silt loam, loam, or sandy loam
Clay content--8 to 17 percent
Total rock fragment content--0 to 25 percent
Gravel content--0 to 25 percent
Cobble content--0 to 10 percent
Reaction--4.5 to 5.5
Thickness--70 to 100 cm
COMPETING SERIES:
Preakness-has a structureless C horizon
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:
Lowdivide--well drained with strongly contrasting particle sizes, coarse-loamy over sandy-skeletal in the particle-size control section; alluvial terraces
Fourstream--well drained and sandy-skeletal in the particle-size control section; alluvial terraces
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--somewhat poorly drained
Saturation in normal years--above the surface November through February, 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--occasional, brief
Ponding--occasional, long
Saturated hydraulic conductivity (Ksat)--high or very high throughout
USE AND VEGETATION:
Use--wildlife recreation, habitat
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, Jefferson County, Washington 2023; name from Happy Lake in Olympic National Park
REMARKS:
Diagnostic horizons and other features in this pedon:
*Particle-size control section--zone from 28 to 103 cm
*Umbric epipedon--zone from 3 to 24 cm
*Cambic horizon--zone from 24 to 150 cm
*Redoximorphic features--zone from 42 to 150 cm
*Aquic conditions--zone from 42 to 150 cm
National Cooperative Soil Survey
U.S.A.