LOCATION DUREILE AK

Established Series
SDB/MJS
08/2025

DUREILE SERIES

Depth class: very deep
Drainage class: well drained
Parent material: organic material over sandy outwash
Landscape: outwash plains
Landform: bluffs
Slopes: 1 to 10 percent
Mean annual precipitation: about 350 mm (14 in)
Mean annual air temperature: about -2 degrees C. (28 degrees F)
Frost-free period: 45 to 90 days

TAXONOMIC CLASS: Sandy, mixed Typic Haplocryepts

TYPICAL PEDON: Dureile sandy loam in a white spruce and sitka alder community on an outwash plain on a linear, linear talf on a west facing slope of 10 percent at an elevation of 657m (2155 ft).

Oe--0 to 6 cm (0 to 2 in); moderately decomposed plant material, dark brown (7.5YR 3/2) moist; many very fine and fine roots throughout; moderately acid (pH 5.8); clear smooth boundary (5 to 18 cm, 2 to 7 in)

A--6 to 10 cm (2 to 4 in); sandy loam, brown (7.5YR 4/2) dry, very dark brown (7.5YR 2.5/2) moist; weak very fine granular structure; soft, very friable, nonsticky, nonplastic; nonsmeary; common very fine and fine, and few medium roots; fine dendritic tubular pores; strongly acid (pH 5.4); abrupt smooth boundary (3 to 15 cm, 1 to 6 in)

Bw1--10 to 26 cm (4 to 10 in); very fine sandy loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 4/4) moist; weak medium subangular blocky structure; soft, very friable, nonsticky, nonplastic; nonsmeary; few very fine and fine roots throughout; fine dendritic tubular pores; slightly acid (pH 6.4) very abrupt smooth boundary

Bw2--26 to 40 cm (10 to 16 in); very fine sandy loam, olive gray (5Y 4/2) moist; weak medium angular blocky structure; soft, very friable, nonsticky, nonplastic; nonsmeary; few fine roots throughout; fine dendritic tubular pores; slightly acid (pH 6.4); clear smooth boundary. (combined thickness14 to 45 cm, 6 to 18 in)

2C1--40 to 85 cm (16 to 34 in); gravelly loamy sand, olive (5Y 5/3) moist; single grain; loose, nonsticky, nonplastic; nonsmeary; few fine roots throughout; fine dendritic tubular pores; 17 percent subrounded gravels; neutral (pH 6.6); clear smooth boundary.

2C2--85 to 150 cm (34 to 49 in); gravelly loamy sand, olive (5Y 5/6) moist; single grain; loose, nonsticky; nonsmeary; few fine roots top of horizon; very fine dendritic tubular pores; 20 percent subrounded gravels by volume; neutral (pH 6.6). Combined thickness (72 to 128 cm, 28 to 50 in)

TYPE LOCATION: North Copper River Soil Survey Area, Alaska; latitude 61.62202, longitude -145.18359, UTM 6833417.25 north and UTM 596306.32 east, zone 6, Datum WGS84.

RANGE IN CHARACTERISTICS:

Soil moisture regime: udic
Soil temperature regime: cryic
Mean annual soil temperature: 1 to 4 degrees C. (34 to 39 degrees F)
Thickness of organic material: 5 to 48 cm (2 to 19 in)
Thickness of ochric epipedon: 8 to 33 cm (3 to 13 in)
Thickness of cambic horizon: 14 to 45 cm (6 to 18 in)
Depth to lithic discontinuity: 22 to 78 cm (9 to 31 in)

Organic example horizon:
Hue: 7.5YR or 10YR
Value: 2 to 3
Chroma: 1 to 3
Texture: highly decomposed organic material, moderately decomposed organic material, slightly decomposed organic material
Organic matter: 60 to 90 percent
Reaction class: strongly acid to slightly acid (pH 5.1 to 6.5)

A horizon:
Hue: 7.5YR or 10YR
Value: 2 to 3
Chroma: 1 to 3
Texture: Sand, sandy loam, very fine sandy loam
Sand: 55 to 95 percent
Silt: 1 to 41 percent
Clay: 4 to 10 percent
Organic matter: 2.5 to 7.2 percent
Reaction class: strongly acid to slightly acid (pH 5.1 to 6.5)

Bw horizons:
Hue: 10YR or 2.5Y
Value: 4 to 5
Chroma: 2 to 4
Texture: Loamy fine sand, sandy loam, very fine sandy loam
Sand: 55 to 85 percent
Silt: 11 to 41 percent
Clay: 4 to19 percent
Rock fragments: 0 to 14 percent
Gravels: 0 to 14 percent
Organic matter: 1 to 3 percent
Reaction class: moderately acid to neutral (pH 5.6 to 7.3)

C horizons:
Hue: 2.5Y or 5Y
Value: 3 to 5
Chroma: 1 to 3
Texture: gravely loamy sand, very gravely loamy sand
Sand: 75 to 90 percent
Silt: 6 to 23 percent
Clay: 2 to 6 percent
Rock fragments: 0 to 45 percent
Gravels: 0 to 45 percent
Organic matter: 0.1 to 1.1 percent
Reaction class: moderately acid to neutral (pH 5.6 to 7.3)

2C horizons:
Hue: 2.5Y or 5Y
Value: 4 to 5
Chroma: 2 to 5
Texture: gravely loamy sand, very gravely loamy sand
Sand: 75 to 90 percent
Silt: 6 to 23 percent
Clay: 2 to 6 percent
Rock fragments: 0 to 45 percent
Organic matter: 0.1 to 1.1 percent
Reaction class: moderately acid to neutral (pH 5.6 to 7.3)

COMPETING SERIES: These are the Beales (AK), Chistna (AK), Chistochina (AK), Gustavus, (AK) Kismetpeak (WY), and Mahloriver (AK) soils.
Kismetpeak soils are somewhat excessively drained, have a paralithic contact within 100 cm (39 in), and have alluvium or colluvium parent material.
Beals soils are somewhat excessively drained, do not have coarse fragments in the parent material, and occur on hills and plains.
Chistina soils are somewhat excessively drained, and a thin cambic horizon.
Chistochina soils are somewhat excessively drained and have a loess mantle.
Gustavus soils lack an A horizon and occur on outwash deltas from 0 to 50 m in elevation.
Mahloriver soils have a folistic epipedon and occur on kames and glacial valley floors.

GEOGRAPHIC SETTING:
Elevation: 400 to 800 meters (1310 to 2625 ft)
Parent material: organic material over sandy outwash
Landform: bluffs
Slopes: 1 to 10 percent
Mean annual precipitation: 300 to 400 mm (12 to 16 in)
Mean annual air temperature: -3 to -1 degrees C. (27 to 30 degrees F)
Frost-free period: 45 to 90 days

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Glennallen and Manker soils.
Glennallen soils are poorly drained, have permafrost, and occur on river valleys and lacustrine terraces in outwash plains and lake plains.
Manker soils are moderately well drained, have permafrost, lack a lithic contact, and are found on north facing slopes

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: well drained
Saturated Hydraulic Conductivity: Very high in the Oe horizon and 2C horizons, high in the A and Bw horizons.
Permeability: Very rapid in the Oe and 2C horizons and moderately rapid in the A and Bw horizons.
Runoff: very low

USE AND VEGETATION:
Use: wildlife habitat, recreation, and subsistence
Native vegetation: white spruce, bog labrador tea, sitka alder

DISTRIBUTION AND EXTENT: MLRA 228 Interior Alaska mountains.
Extent: limited

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Wasilla, Alaska

SERIES ESTABLISHED: North Copper River Soil Survey, Alaska, 2024.

REMARKS: Diagnostic features and horizons recognized in this profile include:

Particle-size control section: 31 to 106 cm (12 to 42 in)

Ochric epipedon: 0 to 10 cm (0 to 4 in) (Oe and A horizons)

Cambic horizon: 10 to 40 cm (4 to 16 in) (Bw1 and Bw2 horizons)

Lithologic discontinuity: 40 to 150 (16 to 59 in) (2C horizon)

ADDITIONAL DATA:

User pedon Id: S2023AK261011

National Cooperative Soil Survey
U.S.A.