LOCATION TROUTLAKE WA

Established Series
Rev. MEH/KWH/TLA/RWL
10/2011

TROUTLAKE SERIES

The Troutlake series consists of very deep, well drained soils that formed in alluvium from basalt and volcanic ash. Troutlake soils are on toeslopes. Slopes are 1 to 5 percent. The mean annual precipitation is about 52 inches and the mean annual temperature is about 44 degrees F.

TAXONOMIC CLASS: Ashy, amorphic, frigid Humic Vitrixerands

TYPICAL PEDON: Troutlake ashy loam- forested, on a 2 percent slope at an elevation of 1,880 feet. (Colors are for dry soil unless otherwise noted. All textures are apparent field textures).

Oi--0 to 1 inch; slightly decomposed leaves and twigs.

A1--1 to 4 inches; brown (10YR 5/3) ashy loam, dark brown (7.5YR 3/2) moist; weak fine and very fine granular structure; slightly hard, friable, slightly sticky, slightly plastic, and weakly smeary; many very fine and fine and few medium roots; many very fine irregular pores; 10 percent gravel; slightly acid (pH 6.2); clear smooth boundary.

A2--4 to 11 inches; brown (10YR 5/3) ashy loam, dark brown (7.5YR 3/2) moist; weak very fine subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic, and weakly smeary; many very fine and fine roots, few medium roots; many very fine irregular and common very fine tubular pores; 5 percent gravel; slightly acid (pH 6.2); clear smooth boundary. (Combined thickness of the A horizon is 8 to 16 inches)

Bw1--11 to 22 inches; yellowish brown (10YR 5/4) ashy loam, dark brown (7.5YR 3/4) moist; weak fine and very fine subangular blocky structure; hard, friable, slightly sticky, moderately plastic, and weakly smeary; common very fine and fine and few medium and coarse roots; many very fine irregular and common very fine tubular pores; 5 percent gravel; slightly acid (pH 6.2); gradual smooth boundary. (10 to 18 inches thick)

Bw2--22 to 41 inches; dark yellowish brown (10YR 4/4) ashy clay loam, dark brown (7.5YR 3/4) moist; medium fine and very fine angular blocky and subangular blocky structure; hard, firm, moderately sticky and moderately plastic; few very fine, fine, medium and coarse roots; common very fine irregular and common very fine tubular pores; 2 percent gravel; slightly acid (pH 6.2); gradual smooth boundary. (14 to 20 inches thick)

Bw3--41 to 61 inches; yellowish brown 10YR 5/4) ashy clay loam; brown (7.5YR 4/4) moist; medium fine and very fine angular blocky and subangular blocky structure; hard, firm, moderately sticky and moderately plastic; few fine and very fine roots; common very fine and few fine tubular pores; 5 percent gravel; slightly acid (pH 6.1).

TYPE LOCATION: Klickitat County, Washington; about 2,300 feet north and 2,300 feet west of the southeast corner of section 36, T.6N., R.10E. (Latitude 45 degrees, 57 minutes, 48 seconds, N. and Longitude 121 degrees, 29 minutes, 41 secondsW.)

RANGE IN CHARACTERISTICS: The mean annual soil temperature is 45 to 47 degrees F. The soil moisture control section is dry in all parts for 45 to 60 consecutive days following the summer solstice. Solum thickness and depth to bedrock is 60 inches or more. Thickness of the mollic epipedon is 8 to 16 inches. The 0 to 40 inch particle-size control section has an estimated moist bulk density of 0.80 to 0.90 g/cc, volcanic glass content of 5 to 30 percent, acid oxalate extractable aluminum plus one-half iron of 2.0 to 3.0 percent, phosphate retention of 85 to 98 percent, and 15 bar water retention of 8 to 12 percent. The particle-size control section ranges from 15 to 30 percent field estimated clay with a weighted average of 18 percent or more. It has 2 to 10 percent rock fragments. Reaction is slightly acid or moderately acid throughout. Base saturation ranges from 60 to 75 percent to a depth of 30 inches.
The A horizon has hue of 7.5YR or 10YR.
The Bw horizon has hue of 7.5YR or 10YR, value of 4 to 6 dry, 3 or 4 moist. Texture is ashy loam or ashy clay loam.

COMPETING SERIES: These are the Glen (T), Kreft (T), Sugarbowl, Timberhead, and Volash series.
Glen series - dry for 60 to 75 consectutive days following the summer solstice; pscs with 20 to 30 percent glass and 1.0 to 2.0 percent acid oxalate extractable Al + 1/2 Fe
Kreft series - dry for 60 to 75 consectutive days following the summer solstice; pscs with 30 to 60 percent glass; umbric epipedon 10 to 14 inches thick; redox concentrations within 40 inches
Sugarbowl series - MAST of 40 to 43 degrees F.; umbric epipedon 10 to 19 inches thick; base saturation (NH4OAc) of less than 50 percent
Timberhead series - pscs with 20 to 35 percent rock fragments; 50 to 85 percent pararock fragments below 40 inches
Volash series - 40 to 60 inches to a lithic contact (basalt)

GEOGRAPHIC SETTING: Troutlake soils are on toeslopes of hills at elevations of 1,800 to 2,500 feet and have slopes of 1 to 5 percent. These soils formed in slope alluvium and colluvium derived from basalt mixed with volcanic ash. Summers are cool and dry and winters are cool and wet with snow cover from December through April. The mean annual precipitation is 50 to 55 inches. The mean January temperature is 24 degrees F. and the mean July temperature is 64 degrees F. The mean annual temperature is 43 to 45 degrees F. The frost-free season is 80 to 90 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Kingtain and Trouter, and soils and the competing Sugarbowl and Volash soils. Kingtain soils are on mountains and are ashy-skeletal. Sugarbowl soils are on terraces and side slopes. Trouter soils are mesic and are on plains. Volash are on plains.

DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; moderate permeability.

USE AND VEGETATION: These soils are used mainly for timber production, livestock grazing, crop production, building sites, and wildlife habitat. The principal crops are hay and pasture. Native vegetation is mainly Douglas-fir, grand fir, and ponderosa pine, with an understory of common snowberry, vine maple, creambush oceanspray, western hazel, rose, strawberry, and western brackenfern.

DISTRIBUTION AND EXTENT: Klickitat County, Washington. MLRA 6. The series is of small extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Klickitat County, Washington, 2003. Name is from the town of Trout Lake, Washington

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from 1 to 11 inches
Cambic horizon - the zone from 11 to 61 inches
Particle-size control section - the zone from 11 to 41 inches (Bw1 and Bw2 horizons)
Andic soil properties - the zone from 1 to 61 inches
The depth to diagnostic horizons and features is measured from the top of the first mineral layer.

ADDITIONAL DATA: This soil was previously named Kilowatt series.

National Cooperative Soil Survey
U.S.A.