LOCATION HUNDELL AK

Established Series
SDB/MJS
08/2025

HUNDELL SERIES

Depth class: very deep
Drainage class: moderately well drained
Parent material: sandy outwash over sandy and gravelly glaciofluvial deposits
Landscape: mountains and outwash plains
Landform: flats, bluffs and mountain valleys
Slope: 0 to 30 percent
Mean annual precipitation: about 600 mm (24 in)
Mean annual air temperature: about -1 degrees C (30 degrees F)
Frost-free period: 40 to 103 days

TAXONOMIC CLASS: Sandy, mixed Typic Cryorthents

TYPICAL PEDON: Hundell silt loam in an open white spruce and ericaceous community on a linear, linear outwash plain on a slope of 1 percent at an elevation of 667m (2190 ft).

Oi--0 to 10 cm (0 to 4 in); slightly decomposed plant material, dark brown (7.5YR 3/4) moist; many very fine and fine, and common and coarse roots; very strongly acid (pH 4.8); abrupt wavy boundary

A--10 to 21 cm (4 to 8 in); silt loam, very dark brown (10YR 2/2) moist; weak fine granular structure; soft, very friable, nonsticky, nonplastic; nonsmeary; many very fine, common fine, medium, and coarse roots; 5 percent rounded gravel by volume; very strongly acid (pH 4.6); abrupt wavy boundary

Bw--21 to 50 cm (8 to 20 in); fine sand, olive brown (2.5Y 4/3) moist; weak medium subangular blocky structure; soft, very friable, nonsticky, nonplastic; nonsmeary; many very fine, and common fine and medium roots; common fine irregular pores; brown (7.5YR 4/4) masses of oxidized iron in matrix; 10 percent rounded gravel by volume; strongly acid (pH 5.5); clear wavy boundary

C--50 to 63 cm (20 to 25 in); medium gravelly sand, dark grayish brown (2.5Y 4/2) moist; massive; loose, nonsticky, nonplastic; nonsmeary; common very coarse roots; 20 percent rounded gravel by volume; moderately acid (pH 5.7); abrupt wavy boundary

2C--63 to 150 cm (25 to 59 in); medium gravelly loamy sand, olive gray (5Y 5/2) moist; slightly hard, firm, nonsticky, nonplastic; nonsmeary; 25 percent rounded gravel by volume; neutral (pH 6.9)

TYPE LOCATION: North Copper River Soil Survey Area, Alaska; latitude 61.61899, longitude -145.18493, UTM 6833077.29 north and UTM 596244.93 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 11 cm (2 to 4 in)
Thickness of ochric epipedon: 15 to 24 cm (6 to 9 in)
Depth to lithologic discontinuity: 42 to 70 cm (17 to 28 in)

Oi or Oe horizons:
Hue: 7.5YR or 10YR
Value: 2 to 3
Chroma: 2 to 3
Texture: slightly decomposed organic material, moderately decomposed organic material, and highly decomposed organic material.
Organic matter: 60 to 90 percent
Reaction class: very strongly acid (pH 4.5 to 5.0)

A horizon:
Hue: 7.5YR or 10YR
Value: 3 to 5
Chroma: 2 to 3
Texture: silt loam, sandy loam, loam
Sand: 35 to 68 percent
Silt: 22 to 50 percent
Clay: 6 to 18 percent
Rock fragments: 0 to 8 percent gravels
Organic matter: 1 to 5 percent
Reaction class: very strongly acid (pH 4.5 to 5.0)

Bw horizon:
Hue: 10YR or 2.5Y
Value: 4 to 6
Chroma: 3 to 6
Texture: silt loam, loamy fine sand, sand, gravelly loamy sand
Sand: 39 to 95 percent
Silt: 0 to 53 percent
Clay: 1 to 8 percent
Rock fragments: 0 to 19 percent
Gravels: 0 to 13 percent
Cobbles: 0 to 6 percent
Organic matter: 0.2 to 0.8 percent
Reaction class: strongly acid to moderately acid (pH 5.1 to 6.0)

C horizon:
Hue: 2.5Y or 5Y
Value: 4 to 6
Chroma: 1 to 3
Texture: loamy sand, fine sand, sand, gravelly loamy sand, gravelly sand
Sand: 75 to 98 percent
Silt: 0 to 19 percent
Clay: 1 to 6 percent
Rock fragments: 2 to 28 percent
Gravels: 2 to 25 percent
Cobbles: 0 to 3 percent
Organic matter: 0 to 0.4 percent
Reaction class: strongly acid to moderately acid (pH 5.1 to 6.0)

2C horizon:
Hue: 10YR or 2.5Y
Value: 4 to 6
Chroma: 1 to 3
Texture: loamy sand, sand, gravelly loamy sand, gravelly sand
Sand: 75 to 96 percent
Silt: 3 to 24 percent
Clay: 1 to 6 percent
Rock fragments: 6 to 31 percent
Gravels: 6 to 28 percent
Cobbles: 0 to 3 percent
Organic matter: 0 to 0.15 percent
Reaction class: neutral (pH 6.6 to 7.3)

COMPETING SERIES: These are the Fossil soils, which lack a loess cap.

GEOGRAPHIC SETTING:
Elevation: 200 to 1000 meters (655 to 3280 ft)
Parent material: sandy outwash over sandy and gravelly glaciofluvial deposits
Landform: flats, bluffs and mountain valleys
Slopes: 0 to 30 percent
Mean annual precipitation: 300 to 1400 mm (12 to 55 in)
Mean annual air temperature: -5 to -1 degrees C. (23 to 30 degrees F)
Frost-free period: 40 to 90 days

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Alterationcreek, Bearcreek, Haggardcreek, Haleycreek, Thirdlake, and Uranatina soils.
Alterationcreek soils are well drained, have a umbric epipedon, and occur on mountain valleys and hillslopes.
Basaltlake soils are well drained, have a cambic horizon, and occur on mountains.
Haggardcreek soils are well drained, have a lithic contact between 65 and 148 cm (26 to 58 in), and occur on mountain slopes and hill slopes.
Haleycreek soils are well drained, have a mollic epipedon, and occurs on hillslopes of mountains and river valleys.
Thirdlake soils are poorly drained, have redoximorphic concentrations starting between 6 to 27 cm (2 to 11 in), and occur on glacial lakes and flats in outwash plains.
Uranatina soils are well drained, have mottles in Bw and C horizons, and occur on outwash plains and glacial lakes.

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

USE AND VEGETATION:
Use: wildlife habitat, recreation, and subsistence
Native vegetation: bog labrador tea, resin birch, bog blueberry, and splendid feather moss

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

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: 35 to 110 cm (14 to 43 in)

Ochric epipedon: 0 to 21 cm (0 to 8 in) (Oi and A horizon)

Lithologic discontinuity: 63 to 150 cm (25 to 59 in) (2C horizon)

ADDITIONAL DATA:

User pedon Id: 2022AK261611

National Cooperative Soil Survey
U.S.A.