LOCATION HAGGARDCREEK AK
Established Series
SDB
08/2025
HAGGARDCREEK SERIES
Depth class: moderately deep to bedrock, lithic
Drainage class: well drained
Parent material: organic material over sandy and loamy till over sandy and gravelly residuum weathered from metamorphic rock
Landscape: mountains, foothills
Landform: hillslopes, hills, pluvial lakes (relict), mountain slopes
Slope: 0 to 26 percent
Mean annual precipitation: about 600 mm (24 in)
Mean annual air temperature: about -3 degrees C (27 degrees F)
Frost-free period: 32 to 71 days
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Typic Haplocryepts
TYPICAL PEDON: Haggard creek gravelly silt loam in a resin birch and bog Labrador tea community on a linear, linear hill shoulder on a slope of 1 percent at an elevation of 873m (2865 ft).
Oi--0 to 11 cm (0 to 4 in); slightly decomposed plant material, dark brown (7.5YR 3/4) moist; common very fine, fine, medium, coarse, and very coarse roots throughout; moderately acid (pH 5.9); clear smooth boundary (10 to 22 cm, 4 to 9 in)
Oe--11 to 15 cm (4 to 6 in); moderately decomposed plant material, dark brown (7.5YR 3/2) moist; common very fine, fine, medium, coarse, and very coarse roots throughout; moderately acid (pH 6.0); abrupt wavy boundary (3 to 8 cm, 1 to 3 in)
A--15 to 22 cm (6 to 9 in); gravelly silt loam, dark brown (7.5YR 3/3) moist; moderate fine granular structure; slightly hard, friable, slightly sticky, nonplastic; nonsmeary; common very fine, fine, medium, and coarse roots throughout; very fine and fine irregular pores; 16 percent subrounded gravel by volume; slightly acid (pH 6.2); abrupt wavy boundary (4 to 16 cm, 2 to 6 in)
E--22 to 25 cm (9 to 10 in); gravelly sandy loam, light brownish gray (10YR 6/2) moist; moderate fine granular structure; soft, very friable, nonsticky, nonplastic; nonsmeary; common very fine, fine, and medium roots throughout; very fine and fine irregular pores; 25 percent gravel by volume; moderately acid (pH 5.8); abrupt broken boundary. (0 to 7 cm, 0 to 3 in)
Bw--25 to 52 cm (10 to 21 in); very gravelly sandy loam, brown (7.5YR 4/4) moist; moderate fine subangular blocky structure; soft, very friable, nonsticky, nonplastic; nonsmeary; common very fine and fine roots throughout; very fine irregular and fine irregular pores; 2 percent cobbles by volume, 35 percent gravel by volume; slightly acid (pH 6.2). (17 to 30 cm, 7 to 12 in)
C1--52 to 63 cm (21 to 25 in); very gravelly sandy loam, dark yellowish brown (10YR 4/4) moist; massive; soft, very friable, nonsticky, nonplastic; nonsmeary; common medium and fine roots throughout; very fine and fine irregular pores; 5 percent cobbles by volume, 35 percent gravel by volume; noneffervescent; slightly alkaline (pH 7.4); clear wavy boundary. (8 to 25 cm, 3 to 10 in)
C2--63 to 100 cm (25 to 39 in); extremely gravelly sandy loam, olive brown (2.5Y 4/4) moist; massive; slightly hard, friable, nonsticky, nonplastic; nonsmeary; common fine roots throughout; very fine irregular and fine irregular pores; 5 percent cobbles, 5 percent flagstones, and 65 percent gravel by volume; neutral (pH 6.9). (23 to 40 cm, 9 to 16 in)
2R--100 to 125 cm (10 in); bedrock
TYPE LOCATION: North Copper River Soil Survey Area, Alaska; latitude 61.59253, longitude -145.00912, UTM 6957953.71 north, and 580166.57 UTM east, zone 6, Datum WGS84.
RANGE IN CHARACTERISTICS:
Soil moisture regime: udic
Soil temperature regime: cryic
Mean annual soil temperature: 0 to 5 degrees C (32 to 41 degrees F)
Thickness of organic material: 13 to 30 cm (5 to 12 in)
Thickness of folistic epipedon: 15 to 30 cm (6 to 12 in)
Thickness of cambic horizon: 17 to 30 cm (7 to 12 in)
Depth to albic horizon: 17 to 46 cm (7 to 18 in)
Depth to lithic contact: 65 to 148 cm (26 to 58 in)
Oi and Oe horizons:
Hue: 7.5YR or 10YR
Value: 2 to 3
Chroma: 1 to 3
Texture: slightly decomposed organic material, moderately decomposed organic material, and highly decomposed organic material.
Organic matter: 60 to 90 percent
Reaction class: moderately acid to slightly acid (pH 5.6 to 6.5)
A horizon:
Hue: 10YR or 2.5Y
Value: 2 to 3
Chroma: 1 to 3
Texture: silt loam, gravelly silt loam
Sand: 29 to 41 percent
Silt: 50 to 67 percent
Clay: 4 to 12 percent
Rock fragments: 5 to 19 percent
Gravels: 5 to 75 percent
Organic matter: 4 to 12 percent
Reaction class: moderately acid to slightly acid (pH 5.8 to 6.5)
E horizon:
Hue: 10YR or 2.5Y
Value: 4 to 6
Chroma: 1 to 3
Texture: sandy loam, gravelly sandy loam
Sand: 59 to 70 percent
Silt: 23 to 37 percent
Clay: 4 to 7 percent
Rock fragments: 12 to 62 percent gravel
Organic matter: 1.2 to 2.0 percent
Reaction class: moderately acid (pH 5.6 to 6.0)
Bw horizon:
Hue: 10YR or 2.5Y
Value: 3 to 4
Chroma: 2 to 4
Texture: loam, sandy loam, gravelly sandy loam, very gravelly sandy loam
Sand: 40 to 78 percent
Silt: 10 to 48 percent
Clay: 4 to 12 percent
Rock fragments: 8 to 42 percent
Gravels: 8 to 38 percent
Cobbles: 0 to 4 percent
Organic matter: 0.5 to 1.3 percent
Reaction class: moderately acid to slightly acid (pH 5.8 to 6.5)
C1 and C2 horizons:
Hue: 2.5Y to 5Y
Value: 4 to 5
Chroma: 2 to 4
Texture: gravelly sandy loam, very gravelly sandy loam, extremely gravelly sandy loam
Sand: 54 to 78 percent
Silt: 10 to 41 percent
Clay: 5 to 12 percent
Rock fragments: 21 to 82 percent
Gravels: 21 to 70 percent
Cobbles: 0 to 6 percent
Stones: 0 to 6 percent
Organic matter: 0.05 to 0.2 percent
Reaction class: slightly acid to slightly alkaline (pH 6.6 to 7.8)
COMPETING SERIES: These are the
Aniruk (AK),
Anugi (AK),
Basaltlake (AK), Biorkman (UT),
Butchlake (AK),
Cuberant (UT),
Enentah (CO),
Garlet (MT),
Gromes (NM),
Kegsprings (MT),
Mountedith (MT),
Nooney (MT),
Nunatak (AK), Ride (AK), Siksik (AK),
Siksrik (AK),
Soakpak (AK),
Storm (CO),
Targhee (ID),
Telay (AK),
Tui (AK), and
Urgiilik (AK) soils.
Aniruk,
Basaltlake,
Butchlake, Biorkman,
Enentah,
Gromes,
Kegsprings,
Mountedith, Ride, Siksik,
Siksrik, soakpak,
Storm, and
Tui soils lack a lithic contact within 200 cm (79 in).
Anugi soils have a lithic contact between 150 and 200 cm (59 and 79 in) and occur on mountain slopes and hills.
Cuberant soils have a cambic horizon with a hue of 7.5YR or 5YR, value of 4 through 6, and chroma of 3 or 4 moist, and occur at elevations above 2591 m (8500 ft).
Garlet soils have a calcic horizon and lack a lithic contact within 200 cm (79 in)
Nooney soils occur at elevations above 1600 m (5250 ft) and have a mean annual precipitation between 1150 and 2600 mm (45 to 102 in).
Nunatak soils are well drained, have a lithic contact between 100 and 150 cm (39 and 59 in), and occur on mountain slopes.
Targhee soils have a lithologic discontinuity.
GEOGRAPHIC SETTING:
Elevation: 400 to 1200 meters (1310 to 3935 ft)
Parent material: organic material over sandy and loamy till over sandy and gravelly residuum weathered from metamorphic rock
Landform: hills, mountain slopes
Slopes: 0 to 25 percent
Mean annual precipitation: 400 to 800 mm (16 to 31 in)
Mean annual air temperature: -4 to -2 degrees C (25 to 28 degrees F)
Frost-free period: 32 to 71 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Ahtell,
Alterationcreek,
Chuu, Haleycreek, Hundell, Littletok, Manker, Mineralcreek, Rocklake, and Swampylakes soils.
Ahtell soils are well drained, have folistic and umbric epipedons, and occur on hill tops and hillside positions.
Alterationcreek soils are well drained, have bedrock between 101 and 154 cm (40 to 61 in), and occur on hillslopes and mountain valleys.
Chuu soils are somewhat poorly drained, have a mollic epipedon, have calcic horizons, and occur on loess covered terraces and valley bottoms.
Haleycreek soils are well drained, have mollic epipedons, lack a lithic contact, and occur on hillslopes of mountains and river valleys.
Hundell soils are moderately well drained, lack a lithic contact, and occur on flats and bluffs in till plains and outwash plains.
Littletok soils are poorly drained permafrost soil and occur on the north and north eastern aspects mountain slopes.
Manker soils have permafrost, cryoturbated horizons, lack a lithic contact, and occur on north facing slopes.
Mineralcreek soils are somewhat poorly drained organic soil, form over silt loam mineral soil, and occur on flood plains in till plains.
Rocklake soils are less than 50 cm deep to bedrock, and occur on occur on escarpments and ridges on mountain sides
Swampylakes soils are somewhat poorly drained, have mollic epipedons, aquic conditions starting between 34 and 40 cm (13 and 16in), and occur on mountain slopes and hillslopes.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: well drained
Saturated Hydraulic Conductivity: very high in the Oi and Oe horizons, high in the Bw E, C1 and C2 horizons, moderately high in the A horizon, low in the R horizon.
Permeability: very rapid in the Oi and Oe horizons, moderately rapid in the Bw E, C1 and C2 horizons, moderate in the A horizon, slow in the R horizon.
Runoff: low
USE AND VEGETATION:
Use: wildlife habitat, recreation, and subsistence
Native vegetation: bog Labrador tea, resin birch, and schreber's big red stem 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: 40 to 115 cm (16 to 45 in)
Folistic epipedon: 0 to 15 cm (0 to 6 in) (Oi and Oe horizon)
Cambic horizon: 25 to 52 cm (10 to 20 in) (Bw horizon)
Lithic contact: 100 to 125 cm (39 to 49 in) (R horizon)
ADDITIONAL DATA:
User pedon Id: 2020AK261068
National Cooperative Soil Survey
U.S.A.