LOCATION COOLCAMP OR
Tentative Series
DRJ/JGM/MPR
12/2024
COOLCAMP SERIES
Landscape--central western Middle Cascade mountains
Landform--mountain slopes, mountaintops
Slope--2 to 90 percent
Parent material--colluvium derived from volcanic rocks mixed with volcanic ash
Mean annual precipitation--about 2100 mm
Mean annual air temperature--about 6 degrees C
Depth--very deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--frigid
Soil moisture subclass--typic
TAXONOMIC CLASS: Medial-skeletal, amorphic, frigid Typic Hapludands
TYPICAL PEDON: Coolcamp gravelly medial silt loam on a 26-percent, northwest-facing, forested slope at an elevation of 940 m
Oi--0 to 2 cm; slightly decomposed plant material; abrupt smooth boundary
Oe--2 to 6 cm; moderately decomposed plant material; abrupt wavy boundary
A--6 to 36 cm; gravelly medial silt loam, brown (7.5YR 5/2) dry, dark brown (7.5YR 3/2) moist; moderate fine granular structure; very friable, loose, slightly sticky and slightly plastic; many very fine, common fine, medium, and very coarse, and few coarse roots; many very fine and fine irregular pores and common medium and coarse tubular pores; 20 percent gravel; strongly acid (pH 5.3); abrupt wavy boundary
BA--36 to 58 cm; very gravelly medial silt loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) moist; moderate very fine subangular blocky structure; friable, soft, slightly sticky and moderately plastic; common very fine, medium, and very coarse and few fine and coarse roots; many very fine dendritic tubular and irregular pores and common fine, medium, and coarse tubular pores; 30 percent gravel and 5 percent cobbles; strongly acid (pH 5.5); clear wavy boundary
Bw1--58 to 96 cm; very gravelly medial silt loam, light brown (7.5YR 6/4) dry, brown (7.5YR 4/4) moist; moderate fine subangular blocky structure; friable, slightly hard, slightly sticky and slightly plastic; few very fine, fine, medium, coarse, and very coarse roots; common very fine and fine dendritic tubular pores and common very fine and fine and few medium tubular pores; 40 percent gravel and 15 percent cobbles; moderately acid (pH 5.7); clear wavy boundary
Bw2--96 to 150 cm; very gravelly medial silt loam, light brown (7.5YR 6/4) dry, brown (7.5YR 4/4) moist; weak fine subangular blocky structure; friable, slightly hard, slightly sticky and nonplastic; common very fine and few fine, medium, coarse, and very coarse roots; common very fine and fine dendritic tubular pores and common very fine and fine and few medium tubular pores; 40 percent gravel and 15 percent cobbles; moderately acid (pH 5.9)
TYPE LOCATION: Linn County, Oregon, about 36 km east of Sweet Home and about 11.5 km northeast of the junction of Upper Soda Fork Road and OR Highway 20; about 350 m north and 760 m west of the southeast corner of section 27, T. 12 S., R. 5 E., Willamette Meridian; latitude 44.4925278, longitude -122.1973611, datum WGS 84 (coordinates determined with a GPS)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--6 to 8 degrees C
Thickness of umbric epipedon--25 to 50 cm
Ammonium oxalate extractable Al plus 1/2 Fe--2 to 4 percent
Particles 0.02 to 2.0-mm diameter--greater than 30 percent of the fine-earth fraction
Volcanic glass content in 0.02- to 2.0-mm fraction--5 to 30 percent
15-bar water retention--30 to 70 percent (undried samples), greater than 15 percent (dried samples)
Phosphate retention--85 to 100 percent
1/3-bar bulk density--0.6 to 0.9 g/cm3
Reaction--pH 5.1 to 6.0
O horizons
*Composition--slightly to moderately decomposed plant material
*Combined thickness--0 to 10 cm
A horizon
*Hue--10YR, 7.5YR
*Value--2 to 3 moist, 3 to 5 dry
*Chroma--2 or 3 moist or dry
*Fine-earth texture--medial silt loam, medial loam
*Clay content--15 to 22 percent
*Sand content--20 to 40 percent
*Total fragment content--5 to 50 percent
*Gravel content--5 to 50 percent
*Cobble content--0 to 10 percent
*Thickness--25 to 50 cm
BA horizon, or AB horizon (where present)
*Hue--10YR, 7.5YR
*Value--2.5 to 4 moist, 4 to 6 dry
*Chroma--2 to 4 moist, 3 or 4 dry
*Fine-earth texture--medial silt loam, medial loam
*Clay content--18 to 27 percent
*Sand content--20 to 40 percent
*Total fragment content--35 to 60 percent
*Gravel content--25 to 60 percent
*Cobble content--0 to 20 percent
*Stone content--0 to 5 percent
*Thickness--0 to 35 cm
Bw1 horizon
*Hue--10YR, 7.5YR
*Value--3 to 5 moist, 5 to 7 dry
*Chroma--3 or 4 moist, 3 to 6 dry
*Fine-earth texture--medial silt loam, medial loam
*Clay content--18 to 27 percent
*Sand content--20 to 40 percent
*Total fragment content--35 to 60 percent
*Gravel content--25 to 60 percent
*Cobble content--0 to 30 percent
*Stone content--0 to 5 percent
Bw2 horizon
*Hue--2.5Y, 10YR, 7.5YR
*Value--3 to 5 moist, 5 to 7 dry
*Chroma--3 or 4 moist, 3 to 6 dry
*Fine-earth texture--medial silt loam, medial loam
*Clay content--18 to 27 percent
*Sand content--20 to 40 percent
*Total fragment content--35 to 70 percent
*Gravel content--25 to 60 percent
*Cobble content--5 to 30 percent
*Stone content--0 to 10 percent
*Combined thickness of Bw horizons--65 to 125 cm
COMPETING SERIES:
Kyotesue--ochric epipedon
GEOGRAPHIC SETTING:
Elevation--790 to 1100 m
Climate--cool, wet winters; warm, dry summers
Mean annual precipitation--1800 to 2400 mm
Mean annual air temperature--5 to 7 degrees C
Frost-free period--90 to 150 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Cadenza-- andic soil properties in layers with thickness totaling less than 36 cm; located on mountain slopes
Fernwood--andic soil properties in layers with thickness totaling less than 36 cm; located on mountain slopes
Menagerie--averages less than 35 percent rock fragments in the particle-size control section; located on complex landslides and mountain slopes
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high
USE AND VEGETATION:
Use--timber production, water supply, wildlife habitat, recreation
Potential natural vegetation--Douglas-fir, western hemlock, Pacific rhododendron, Cascade barberry, salal, whiteveined wintergreen, red huckleberry, common beargrass, snow raspberry, twinflower
DISTRIBUTION AND EXTENT: Central western Cascade Mountains, Oregon; MLRA 3; moderate extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Willamette National Forest, Linn County, Oregon; named for historic logging camp
REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 6 to 106 cm
*Umbric epipedon--zone from 6 to 36 cm
*Cambic horizon--zone from 36 to 150 cm
*Andic soil properties--zone from 6 to 150 cm
*Volcanic glass--zone from 6 to 150 cm
09/2023--all mineral horizons meet criteria #3 and #2 (no ash required) for andic soil properties in the 13th edition of Keys to Soil Taxonomy.
ADDITIONAL DATA: Type location user site ID--2013OR043004
National Cooperative Soil Survey
U.S.A.