LOCATION BANDARROW OR
Established Series
Rev. JLW/RJO/DAL/KMS
11/2018
BANDARROW SERIES
Landscape--mountains
Landform--flood plains and meadows of mountain valleys, plateaus
Slope--0 to 30 percent
Parent material--alluvium derived from mixed sources
Mean annual precipitation--about 860 mm
Mean annual air temperature--about 4 degrees C
Depth class--very deep
Drainage class--poorly drained
Soil moisture regime--aquic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive Typic Cryaquolls
TYPICAL PEDON: Bandarrow silt loam in a wet meadow, on a 0-percent slope at an elevation of 1500 m (Soil textures are apparent field textures.)
A--0 to 25 cm; silt loam, brown (7.5YR 5/2) dry, very dark grayish brown (10YR 3/2) moist; moderate fine granular structure; hard, friable, slightly sticky and slightly plastic; common very fine, fine, and medium roots; common very fine, fine, and medium tubular pores; strongly acid (pH 5.5); clear wavy boundary
AC--25 to 48 cm; silt loam, pinkish gray (7.5YR 6/2) dry, brown (7.5YR 4/2) moist; coarse faint dark gray (10YR 4/1) mottles; moderate very fine and fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine, fine, and medium roots; common very fine and fine tubular pores; moderately acid (pH 6.0); clear wavy boundary
C1--48 to 76 cm; loam, pinkish gray (7.5YR 7/2) dry, brown (7.5YR 4/2) moist; weak medium angular blocky structure parting to weak fine angular blocky; hard, firm, slightly sticky and slightly plastic; common very fine roots; fine distinct reddish brown (5YR 4/4) mottles; slightly acid (pH 6.5); clear smooth boundary
C2--76 to 150 cm; very gravelly loamy sand, pinkish gray (7.5YR 6/2) dry, brown (7.5YR 4/3) moist; single grain; soft, loose, nonsticky and nonplastic; 10 percent cobbles and 40 percent gravel, by volume; slightly acid (pH 6.3)
TYPE LOCATION: Umatilla County, Oregon; in the SE1/4NW1/4NW1/4 of section 32, T. 6 S., R. 34 E.; latitude 45.0099053, longitude -118.6557751, datum WGS 84 (coordinates estimated from PLSS details)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--3 to 6 degrees C
Mean summer soil temperature--7 to 11 degrees C
Mean winter soil temperature--0 to 2 degrees C
Soil moisture--dry less than 25 days in summer
Thickness of mollic epipedon--25 to 40 cm
Depth to aquic conditions--25 to 40 cm
Organic carbon content--regular decrease as depth increases
Particle-size control section
*Clay content--3 to 15 percent
*Total rock fragment content--5 to 20 percent
A horizon
Hue--7.5YR, 10YR
Value--2 to 3 moist, 3 to 5 dry
Chroma--1 or 2 moist or dry
Fine-earth texture--silt, silt loam
Clay content--1 to 22 percent
Sand content--5 to 35 percent
Organic matter content--2.5 to 8.0 percent
Reaction--5.1 to 6.0
AC horizon
Hue--7.5YR, 10YR
Value--2 to 3 moist, 4 to 5 dry
Fine-earth texture--silt loam, sandy loam
Clay content--2 to 22 percent
Sand content--20 to 60 percent
Organic matter content--2.5 to 8.0 percent
Reaction--5.6 to 6.5
C1 horizon
Hue--7.5YR, 10YR
Value--3 or 4 moist
Chroma--2 or 3 moist or dry
Fine-earth texture--silt loam, sandy loam
Clay content--3 to 18 percent
Sand content--35 to 60 percent
Organic matter content--0 to 1 percent
Reaction--6.1 to 7.3
C2 horizon
Hue--7.YR, 10YR
Value--3 or 4 moist
Chroma--2 or 3 moist or dry
Fine-earth texture--sandy loam, loamy sand
Clay content--2 to 17 percent
Sand content--65 to 80 percent
Organic matter content--0 to 1 percent
Total rock fragment content--30 to 55 percent
Gravel content--25 to 40 percent
Cobble content--5 to 15 percent
Stone content--0 to 4 percent
Reaction--6.1 to 7.3
COMPETING SERIES:
Fourlo--mollic epipedon 50 to 150 cm thick
Habenome--irregular decrease in organic carbon content as depth increases
Rosane--hue of 5Y or 2.5Y; sandy-skeletal material at a depth of 60 to 100 cm
Venapass--mollic epipedon 40 to 60 cm thick; neutral or slightly alkaline
GEOGRAPHIC SETTING:
Elevation--1190 to 2290 m
Climate--cold, wet winters; cool, moist summers
Mean annual precipitation--390 to 1430 mm
Mean annual air temperature--1 to 7 degrees C
Frost-free period--15 to 75 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Bodale--on high terraces of narrow mountain valley floors; under subalpine fir
Broadycreek--on low terraces of mountain valley floors
Bucketlake--on moraines of mountain valley floors; thick mantle of volcanic ash
Digit--on high alluvial terraces; thick mantle of volcanic ash; under grand fir
Icedee--on mountain slopes; thick ash mantle; under lodgepole pine or subalpine fir
Melloe--on wet mountain meadows and flood plains of broad mountain valley floors
Tamara--on mountain slopes; thick mantle of volcanic ash
Troutmeadows--on mountain slopes and dissected plateaus; thick mantle of volcanic ash
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Saturation during normal years--at a depth of 76 cm or more in February, July, and August; at a depth of 23 cm or more in March through June
Flooding--occasional, brief periods in February through August
Ponding--none
Saturated hydraulic conductivity (Ksat)--moderately high over high or very high
USE AND VEGETATION:
Use--watershed, wildlife habitat, recreation, livestock grazing
Potential native vegetation--Engelmann spruce, subalpine fir, lodgepole pine, grand fir, western larch, whitebark pine, tufted hairgrass, Cusick's sedge, meadow foxtail, sedge, beaked sedge, Columbia brome, water sedge, blister sedge, Ross' sedge, American bistort, western Jacob's-ladder, Kentucky bluegrass, camas, horsetail, buttercup, western needlegrass, sandwort, Hood sedge, reedgrass
DISTRIBUTION AND EXTENT: Blue Mountains of northeastern Oregon; MLRA 10; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Wallowa-Whitman National Forest, Oregon; 2012
REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Mollic epipedon--zone from the surface to a depth of 25 cm
*Cambic horizon--zone from 25 to 76 cm
*Particle-size control section--zone from 25 to 100 cm
*Depth to aquic conditions--25 cm
National Cooperative Soil Survey
U.S.A.