LOCATION SMOKEY BAY              AK

Established Series
Rev. DVP/DLM
02/2022

SMOKEY BAY SERIES

Depth class: very deep
Drainage class: somewhat poorly drained
Parent material: stratified alluvium and/or colluvium
Landform: alluvial fans
Slopes: 0 to 15 percent
Mean annual precipitation: 24 to 30 inches
Mean annual temperature: 35 to 37 degrees F.

TAXONOMIC CLASS: Coarse-loamy, mixed, active, nonacid Oxyaquic Cryorthents

TYPICAL PEDON: Smokey Bay silt loam - on a south facing slope of 7 under grass pasture. (All colors are for moist soil)

Oa--0 to 2 inches; black (10YR 2/1); highly decomposed plant material; many very fine, fine, and common medium roots; strongly acid (pH 5.1); clear smooth boundary. (1 to 4 inches thick)

A--2 to 8 inches; dark brown (10YR 3/3) silt loam; weak fine granular structure; very friable, nonsticky and nonplastic; common very fine and fine, few medium roots; 10 percent gravel; slightly acid (pH 6.1); clear wavy boundary. (4 to 8 inches thick)

C--8 to 26 inches; dark grayish brown (10YR 4/2) gravelly very fine sandy loam; massive; friable, nonsticky and nonplastic; few very fine, fine, and medium roots; 30 percent gravel; moderately acid (pH 5.8); clear wavy boundary. (8 to 20 inches thick)

Cg1--26 to 55 inches; grayish brown (10YR 5/2) stratified silt loam and fine sandy loam; massive; friable, nonsticky and nonplastic; slightly smeary; 10 percent 3 mm prominent brown (7.5YR 4/4) redoximorphic concentrations and 25 percent 4 mm faint dark gray (10YR 4/1) redoximorphic depletions; 10 percent gravel; moderately acid (pH 5.8); clear wavy boundary. (15 to 30 inches thick)

Cg2--55 to 72 inches; dark grayish brown (2.5Y 4/2) fine sandy loam; massive; friable, nonsticky and nonplastic; slightly smeary; 5 percent gravel; neutral (pH 6.7).

TYPE LOCATION: Western Kenai Peninsula Area, Alaska; about 5 miles northeast of Homer, Alaska; in the 100 feet west and 2,000 feet south of the NE 1/4, section 1, T. 6 s., R. 13 3.; Seldovia C-5 NE 1:25,000 quad, Seward Meridian; UTM north 6617370 and UTM east 590080, zone 5, NAD 27 Alaska.

RANGE IN CHARACTERISTICS:

Soil moisture regime: udic
Mean annual soil temperature: about 34 degrees F
Depth to redoximorphic features: 20 to 30 inches
Soil profile: above 40 inches are saturated for short periods of time during the growing season

O horizon:
Matrix color; value of 2 or 3; chroma of 1 to 3
Reaction: very strongly acid or strongly acid

A horizon:
Matrix color: hue of 10YR or 2.5Y; value of 3 to 5; chroma of 2 or 3
Texture: silt loam, very fine sandy loam
Coarse fragment content: 0 to 10
Reaction: moderately acid or slightly acid

C or Cg horizons:
Matrix color: hue of 10YR or 2.5Y; value of 3 to 5; chroma of 2 or 3
Redoximorphic features: size, color and abundance are variable
Texture: fine sandy loam, loam, silt loam, stratified silt loam and fine sandy loam modified by 0 to 30 total coarse fragments; 0 to 30 percent gravel, 0 to 5 percent cobbles
Reaction: moderately acid to neutral

COMPETING SERIES: There are no competing series in this classification.

GEOGRAPHIC SETTING:
Drainage class: somewhat poorly drained
Parent material: stratified alluvium and/or colluvium
Landform: alluvial fans
Slopes: 0 to 15 percent
Mean annual temperature: 35 to 37 degrees F.
Mean annual precipitation: 24 to 30 inches

GEOGRAPHICALLY ASSOCIATED SOILS: These are Beluga and Starichkof soils. Beluga and Starichkof soils are very poorly drained and occur on depressions.

DRAINAGE AND PERMEABILITY: Somewhat poorly drained, medium to high runoff. Saturated hydraulic conductivity is moderately high to high.

USE AND VEGETATION: These soils are used for home sites, pasture, and wildlife habitat. Native vegetation is bluejoint reed grass, alder, elderberry, and other shrubs.

DISTRIBUTION AND EXTENT: MLRA 224 Cook Inlet Lowland, South-central Alaska. The series is of small extent.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA

SERIES ESTABLISHED: Western Kenai Peninsula, Alaska, 2005

REMARKS: Diagnostic features and horizons recognized in this profile are:
Gleyed horizons: 26 to 72 inches. (Cg1 and Cg2 horizons)
Particle size control section: coarse-loamy from 10 to 40 inches
Redoximorphic features: 26 to 72 inches. (Cg1 and Cg2 horizons)
Temperature regime: cryic

ADDITIONAL DATA:

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National Cooperative Soil Survey
U.S.A.