LOCATION BURNTCREEK IDEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, active, frigid Vitrandic Hapludolls
TYPICAL PEDON: Burntcreek ashy loam - in hayland at 3,000 feet elevation. (Colors are for dry soil unless otherwise noted.)
Ap1--0 to 7 inches; brown (10YR 4/3) ashy loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure parting to moderate fine granular; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and few fine roots; many very fine and common fine irregular pores; moderately acid (pH 5.8); clear smooth boundary.
Ap2--7 to 11 inches; brown (10YR 4/3) ashy loam, very dark grayish brown (10YR 3/2) moist; moderate very fine, fine and medium subangular blocky structure; hard, friable, slightly sticky and slightly plastic; many very fine roots; common very fine and few fine irregular, and many very fine tubular pores; moderately acid (pH 5.8); clear wavy boundary. (Combined thickness of the Ap horizons is 11 to 18 inches)
Bw1--11 to 21 inches; brown (7.5YR 4/4) loam, dark brown (7.5YR 3/4) moist; weak medium prismatic structure parting to moderate medium subangular blocky; hard, friable, slightly sticky and slightly plastic; common very fine roots; many very fine, common fine and medium, and few coarse tubular pores; 5 percent krotovinas; strongly acid (pH 5.5); gradual wavy boundary.
Bw2--21 to 28 inches; yellowish brown (10YR 5/4) loam, dark yellowish brown (10YR 3/4) moist; few fine faint brown (7.5YR 4/4) moist masses of iron accumulations; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; many very fine, common fine and medium, and few coarse tubular pores; few distinct skeletans in pores; 1 percent fine gravel; moderately acid (pH 5.7); clear smooth boundary.
Bw3--28 to 36 inches; yellowish brown (10YR 5/4) loam, dark brown (7.5YR 3/4) moist; few fine faint dark brown (7.5YR 3/3) moist masses of iron accumulations; weak fine and medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; many very fine and common fine tubular and common very fine irregular pores; 1 percent fine gravel; moderately acid (pH 5.8); clear smooth boundary. (Combined thickness of the Bw horizons is 25 to 38 inches)
C1--36 to 48 inches; yellowish brown (10YR 5/4) stratified very gravelly loam to silt loam, brown (7.5YR 4/4) moist; common medium distinct strong brown (7.5YR 4/6) moist masses of iron accumulations; stratified gravel lenses between areas of weak fine and medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; many very fine, common fine and few medium irregular pores; 5 to 45 percent fine gravel; slightly acid (pH 6.3); abrupt wavy boundary. (6 to 12 inches thick)
C2--48 to 60 inches; brown (7.5YR 5/4) stratified silt loam to fine sandy loam, brown (7.5YR 4/4) moist; many fine and medium distinct dark brown (7.5YR 3/4) moist mottles and few fine prominent olive gray (5Y 5/2) moist masses of iron depletion; weak very coarse prismatic structure; hard, friable, slightly sticky and slightly plastic; common very fine irregular and few very fine tubular pores; 5 percent gravel; moderately acid (pH 6.0).
TYPE LOCATION: Clearwater County, Idaho; about 1.5 miles south and 0.5 miles east of Weippe, Idaho; about 500 feet south and 2,100 feet east of the northwest corner of sec. 26, T.35N., R.4E. Latitude - 46 degrees North, 21 minutes, 9 second; Longitude - 115 degrees West, 55 minutes, 27 seconds. USGS Weippe South Quadrangle.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness - 11 to 18 inches
Depth to apparent water table - 12 to 24 inches (from February to May)
Average annual soil temperature - 44 to 46 degrees F. Frigid temperature regime.
Soil moisture control section - usually moist year round and dry for less than 45 consecutive days from June to October. Udic moisture regime
A and Ap horizons
Hue - 7.5YR or 10YR
Value - 4 to 6 dry, 2 or 3 moist
Chroma - 3 or 4 dry, 2 or 3 moist
Texture - ASHY-SIL, ASHY-L, ASH-CL
Clay content - 18 to 32 percent
Reaction - strongly acid to slightly acid
AB horizons (present in some pedons)
Hue - 7.5YR or 10YR
Value - 4 or 5 dry
Chroma - 3 or 4 dry, 2 or 3 moist
Texture - SIL, L, SL, SICL
Clay content - 17 to 34 percent
Reaction - strongly acid to moderately acid
Bw horizons
Hue - 7.5YR or 10YR
Value - 4 to 6 dry, 3 to 5 moist
Chroma - 2 to 5 dry, 3 or 4 moist
Texture - L, SIL, SL, SCL, COSL, CL
Clay content - 12 to 27 percent
Reaction - strongly acid or moderately acid
A BC horizon is present in some pedons.
C horizons
Hue - 7.5YR, 10YR or 2.5Y
Value - 4 to 7 dry, 3 to 5 moist
Chroma - 1 to 5 dry, 1 to 4 moist
Texture - Stratified GRV-SCL to COS
Clay content - 2 to 18 percent
Coarse fragment content - 5 to 45 percent gravel
Reaction - strongly acid to slightly acid
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Burntcreek soils are on convex positions on drainageways and flood plains at elevations of 3,000 to 3,400 feet. These soils formed in mixed alluvium. The slope range is 0 to 3 percent. The average annual temperature is 38 to 44 degrees F. The average annual precipitation is 30 to 40 inches and the frost free season is 50 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Gramil and Lewhand series. Gramil soils are on lacustrine terraces and have an argillic horizon at 20 to 40 inches. Lewhand and Pormont soils are in small basins and drainageways and have a fragipan above 20 inches.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; an apparent water table is present at 12 to 24 inches from February to May; runoff is very slow; permeability is moderate.
USE AND VEGETATION: Used mainly for livestock grazing, watershed and limited crop production. The main crops are oats and hay. Potential native vegetation is grand fir, lodgepole pine, black hawthorn, queencup beadlily, longtube twinflower, goldthread and snowberry.
DISTRIBUTION AND EXTENT: North central Idaho; Burntcreek soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Clearwater County, Idaho, 2003.
REMARKS: Diagnostic horizons and other features recognized in this pedon are:
Mollic epipedon - The zone from 0 to 11 inches (Ap1 and Ap2 horizons)
Cambic horizon - The zone from 11 to 36 inches (Bw1, Bw2 and Bw3 horizons)
Particle size control section - The zone from 10 to 40 inches (part of the Ap2, Bw1, Bw2, Bw3 horizons and part of the C1 horizon)
ADDITIONAL DATA: Laboratory data: Soil Survey Sample No. S92ID-035-033 (project no. 93P 16, pedon no. 93P 88) Clearwater County, Idaho, by NSSL, Lincoln NE.