LOCATION BORDENGULCH OR

Established Series
Rev. AEK/DAL/KMS
11/2018

BORDENGULCH SERIES

Landscape--mountains
Landform--mountain slopes; mass failures on mountain slopes; north-facing, convex backslopes
Slope--0 to 90 percent
Parent material--thin mantle of volcanic ash over colluvium and residuum derived from argillite or sandstone
Mean annual precipitation--about 880 mm
Mean annual air temperature--about 3 degrees C
Depth class--moderately deep to lithic bedrock
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic

TAXONOMIC CLASS: Loamy-skeletal, isotic Andic Haplocryepts

TYPICAL PEDON: Bordengulch ashy silt loam in an area of woodland, on a 12-percent, planar, northwest-facing slope at an elevation of 1730 m

Oi--0 to 1 cm; slightly decomposed needles and twigs

Oe--1 to 3 cm; moderately decomposed organic matter

A--3 to 13 cm; ashy silt loam, very pale brown (10YR 7/4) dry, dark yellowish brown (10YR 4/4) moist; weak coarse subangular blocky structure parting to weak fine and medium subangular blocky; soft, very friable, nonsticky and nonplastic; common fine and medium and few coarse roots; common fine and few medium tubular pores; 10 percent gravel; neutral (pH 7.0); gradual smooth boundary

Bw--13 to 36 cm; ashy silt loam, very pale brown (10YR 7/4) dry, yellowish brown (10YR 5/4) moist; massive parting to weak fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine and few medium and coarse roots; few fine tubular pores; 10 percent gravel; slightly acid (pH 6.5); abrupt wavy boundary

2EBb--36 to 56 cm; extremely gravelly sandy loam, very pale brown (10YR 7/3) dry, light yellowish brown (10YR 6/4) moist; weak very fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine and medium and few coarse roots; many fine and few medium irregular pores; 65 percent gravel and 5 percent cobbles, slightly acid (pH 6.5); clear wavy boundary

2Bwb--56 to 79 cm; extremely gravelly sandy loam, very pale brown (10YR 7/4) dry, yellowish brown (10YR 5/4) moist; weak very fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine and medium and few coarse roots; many fine and few medium irregular pores; 70 percent gravel and 5 percent cobbles; slightly acid (pH 6.5); clear wavy boundary

2BCb--79 to 94 cm; extremely gravelly sandy loam, very pale brown (10YR 7/4) dry, yellowish brown (10YR 5/4) moist; weak very fine subangular blocky structure; soft, friable, slightly sticky and nonplastic; few fine and medium roots; many fine and few medium irregular pores; 75 percent gravel and 10 percent cobbles; slightly acid (pH 6.5); abrupt irregular boundary

2R--94 cm; argillite

TYPE LOCATION: Grant County, Oregon; about 510 m south and 625 m west of the northeast corner of section 30, T. 9 S., R. 36 E.; latitude 44.7554750, longitude -118.3433863, datum WGS 84 (coordinates from unknown source)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--2 to 5 degrees C
Mean summer soil temperature--5 to 9 degrees C
Mean winter soil temperature-- -2 to 2 degrees C
Soil moisture--usually moist, but dry 30 to 45 consecutive days in summer
Depth to lithic contact--50 to 100 cm
Thickness of ash-influenced layers--18 to 36 cm

Estimated properties of layers influenced by volcanic ash
*Ammonium oxalate extractable Al + 1/2 Fe--2.5 to 3.5 percent
*0.02- to 2.0-mm fraction--50 to 65 percent
*Glass content in 0.02- to 2.0-mm fraction--50 to 80 percent
*1/3-bar bulk density--0.65 to 0.85 g/cm3
*Phosphate retention--75 to 100 percent
*15-bar water retention--5 to 12 percent (dried samples)

Particle-size control section
*Clay content--5 to 18 percent
*Total rock fragment content--35 to 85 percent

A horizon
Hue--10YR
Value--3 or 4 moist, 5 to 7 dry
Chroma--3 or 4 moist or dry
Fine-earth texture--ashy silt loam
Clay content--5 to 15 percent
Sand content--20 to 40 percent
Organic matter content--1 to 4 percent
Total rock fragment content--5 to 10 percent
Gravel content--0 to 10 percent
Cobble content--0 to 5 percent
Stone content--0 to 5 percent
Boulder content--0 to 5 percent
Reaction--6.1 to 7.3

Bw horizon
Hue--10YR
Value--4 or 5 moist, 5 to 7 dry
Chroma--3 to 6 moist or dry
Fine-earth texture--ashy silt loam, ashy loam
Clay content--5 to 15 percent
Sand content--20 to 50 percent
Organic matter content--1 to 4 percent
Total rock fragment content--10 to 30 percent
Gravel content--5 to 30 percent
Cobble content--0 to 10 percent
Stone content--0 to 5 percent
Boulder content--0 to 5 percent
Reaction--6.1 to 7.3

2EBb or 2Eb horizon
Hue--10YR
Value--4 to 6 moist, 5 to 7 dry
Chroma--2 to 4 moist or dry
Fine-earth texture--loam, sandy loam
Clay content--5 to 18 percent
Sand content--45 to 70 percent
Organic matter content--1 to 3 percent
Total rock fragment content--35 to 85 percent
Gravel content--30 to 65 percent
Cobble content--5 to 20 percent
Stone content--0 to 5 percent
Reaction--5.1 to 6.5

2Bwb horizon
Hue--10YR, 2.5Y
Value--4 or 5 moist, 5 to 7 dry
Chroma--3 to 6 moist or dry
Fine-earth texture--loam, sandy loam
Clay content--5 to 18 percent
Sand content--45 to 70 percent
Organic matter content--0.5 to 2.5 percent
Total rock fragment content--35 to 85 percent
Gravel content--30 to 70 percent
Cobble content--5 to 30 percent
Stone content--0 to 10 percent
Reaction--5.1 to 6.5

2C horizon
Hue--10YR, 2.5Y
Value--4 to 6 moist, 6 or 7 dry
Chroma--3 to 6 moist or dry
Fine-earth texture--loam, sandy loam
Clay content--5 to 18 percent
Sand content--45 to 70 percent
Organic matter content--0.5 to 1.0 percent
Total rock fragment content--35 to 85 percent
Gravel content--10 to 75 percent
Cobble content--10 to 25 percent
Stone content--0 to 5 percent
Boulder content--0 to 5 percent
Reaction--5.1 to 6.5

COMPETING SERIES:
Bearpawmeadow--derived from hard igneous extrusive rock
Marblepoint, Risingwolf, Vandamine--no lithic contact in upper 200 cm (very deep)
Monumentrock--lithic contact at a depth of 100 to 150 cm (deep)

GEOGRAPHIC SETTING:
Elevation--1200 to 2480 m
Climate--cold, wet winters; cool, moist summers
Mean annual precipitation--530 to 1680 mm
Mean annual air temperature--0 to 5 degrees C
Frost-free period--15 to 65 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Angelpeak--100 to 150 cm or more (deep or very deep); in more concave and lower positions; andic properties more than 36 cm thick
Vandamine--in more planar to convex positions and on steeper slopes; no lithic contact in upper 200 cm (very deep)

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Saturation during normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--moderately high or high

USE AND VEGETATION:
Use--timber production, watershed, recreation, wildlife habitat
Potential native vegetation--subalpine fir, Engelmann spruce, lodgepole pine, grand fir, western larch, ponderosa pine, Douglas-fir, pinegrass, grouse huckleberry, pink mountain-heather, heartleaf arnica, elk sedge, violet, prince's pine, big huckleberry, myrtle pachystima, pyrola, Virginia strawberry, sweetcicely, Ross' sedge, lupine, Sitka valerian, northern twinflower, Wyeth buckwheat, pinemat manzanita, skunkleaf polemonium, sidebells wintergreen, white hawkweed, darkwoods violet

DISTRIBUTION AND EXTENT: Blue Mountains in northeastern Oregon; MLRA 10; small extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Wallowa County, Oregon, 1998

REMARKS:
Diagnostic horizons and features recognized in this pedon
*Ochric epipedon
*Cambic horizon--zone from 13 to 94 cm
*Volcanic glass--zone from 3 to 36 cm
*Andic soil properties--zone from 3 to 36 cm
*Depth to lithologic discontinuity--36 cm
*Particle-size control section--zone from 28 to 103 cm

5/06--Classification changed from Dystrocryepts to Haplocryepts based on supporting laboratory data from associated soils that have similar parent material and climate.

10/2018--OSD updated to current standards.

National Cooperative Soil Survey
U.S.A.