LOCATION BERGBAY                 AK

Established Series
IRD. NDP/SCD
02/2022

BERGBAY SERIES

Landscape--mountains
Landform--mountain slopes
Slope--40 to 90 percent
Parent material--colluvium over residuum derived from granite
Mean annual precipitation--about 2500 mm
Mean annual air temperature--about 5 degrees C
Depth class--moderately deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Typic Humicryepts

TYPICAL PEDON: Bergbay stony sandy loam, forested, on a mountain slope of 58 percent at an elevation of 10 m (When described on June 1, 2013, the soil was moist from the surface to a depth of 70 cm and dry below that depth.)

Oe--0 to 8 cm, moderately decomposed plant material; extremely acid (pH 4.2); clear wavy boundary

A--8 to 37 cm; stony sandy loam, dark gray (10YR 4/1) dry, black (10YR 2/1) moist; moderate fine granular structure; soft, very friable, nonsticky and nonplastic; common very fine and many fine, medium, coarse, and very coarse roots throughout; common very fine and fine irregular pores; 5 percent subrounded cobbles, 10 percent subangular stones, and 10 percent rounded gravel, by volume; noneffervescent; strongly acid (pH 5.3); clear wavy boundary

C--37 to 70 cm; extremely stony coarse sandy loam, light brownish gray (10YR 6/2) dry, dark grayish brown (10YR 4/2) moist; massive; soft, very friable, nonsticky and nonplastic; common very fine, fine, medium, coarse, and very coarse roots throughout; common very fine and fine irregular pores; 15 percent subrounded cobbles, 20 percent subangular stones, and 25 percent rounded gravel, by volume; noneffervescent; strongly acid (pH 5.5); abrupt smooth boundary

2R--70 cm; bedrock

TYPE LOCATION: Hoonah-Angoon Census Area, Alaska; latitude 58.3673718, longitude -136.5453275, datum WGS84 (coordinates determined by a GPS unit)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--1 to 7 degrees C
Soil moisture--dry less than 45 consecutive days in June through October (udic)
Thickness of umbric epipedon--18 to 30 cm
Depth to lithic contact--50 to 100 cm (moderately deep)
Other features--lithologic discontinuity

Particle-size control section
*Clay content--4 to 8 percent
*Total rock fragment content--35 to 65 percent

Oe horizon
Thickness--2 to 10 cm

A horizon
Hue--7.5YR or 10YR moist or dry
Value--2 or 3 moist, 4 or 5 dry
Chroma--1 to 3 moist or dry
Fine-earth texture--sandy loam, coarse sandy loam
Clay content--4 to 8 percent
Total rock fragment content--10 to 35 percent
Gravel content--5 to 15 percent
Cobble content--3 to 10 percent
Stone content--5 to 15 percent
Reaction (pH)--4.2 to 5.5
Thickness--18 to 35 cm

C horizon
Value--3 to 5 moist, 5 to 7 dry
Chroma--2 to 4 moist or dry
Fine-earth texture--sandy loam, coarse sandy loam
Clay content--4 to 8 percent
Total rock fragment content--35 to 65 percent
Gravel content--15 to 30 percent
Cobble content--5 to 20 percent
Stone content--10 to 25 percent
Reaction (pH)--5.3 to 5.7
Thickness--25 to 35 cm

COMPETING SERIES:
Atayak--100 to 150 cm (deep) to a lithic contact; mean annual soil temperature of 3 degrees C or less
Buell--no lithic contact within a depth of more than 150 cm (very deep); elevation of more than 2500 m
Ibach--no lithic contact within a depth of more than 150 cm (very deep)
Maquinna--100 to 150 cm (deep) to a lithic contact
McCall, Moran, Walcott--no lithic contact within a depth of more than 150 cm (very deep); cambic horizon

GEOGRAPHIC SETTING:
Elevation--20 to 200 m
Climate--cool, moist summers; mild, wet winters
Mean annual precipitation--1750 to 3350 mm
Mean annual air temperature--3 to 8 degrees C
Frost-free period--90 to 154 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Abdallah--no lithic contact within a depth of more than 150 cm (very deep); no umbric epipedon; in avalanche chutes of similar landforms
Boussole--25 to 50 cm (shallow) to a lithic contact; in mountain valleys of adjacent landforms
Fingers--no lithic contact within a depth of more than 150 cm (very deep); on adjacent landforms
Kashoto--organic; in muskegs of similar landforms
Toyatte--less than 25 cm (very shallow) to a lithic contact; in muskegs of similar landforms

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Depth to saturation in normal years--more than 150 cm year round
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high in A and C horizons

USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--Alaska cedar, fernleaf goldthread, bunchberry dogwood, threeleaf goldthread, dicranum moss, spreading woodfern, western oakfern, splendid feather moss, rusty menziesia, devilsclub, Sitka spruce, Schreber's big red stem moss, strawberryleaf raspberry, salmonberry, twistedstalk, western hemlock, dwarf bilberry, oval-leaf blueberry, red huckleberry

DISTRIBUTION AND EXTENT: Alexander Archipelago-Gulf of Alaska Coast, Alaska; MLRA 220; moderate extent

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

SERIES ESTABLISHED: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; 2020.

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Umbric epipedon--zone from 8 to 37 cm
*Depth to lithologic discontinuity--70 cm
*Depth to lithic contact--70 cm
*Particle-size control section--33 to 70 cm

---

National Cooperative Soil Survey
U.S.A.