LOCATION MILLING                 WA

Established Series
Rev. VB/RJE
09/2019

MILLING SERIES

Landscape--mountains
Landform--mountain slopes, ridgetops
Slope--0 to 60 percent
Parent material--colluvium from basalt, loess, and some volcanic ash
Mean annual precipitation--about 1100 mm
Mean annual air temperature--about 4 degrees C
Depth class--shallow
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--cryic
Soil moisture subclass--typic

TAXONOMIC CLASS: Loamy-skeletal, isotic Lithic Haplocryolls

TYPICAL PEDON: Milling very cobbly loam

A1--0 to 13 cm; very cobbly loam, brown (7.5YR 4/4) dry, dark reddish brown (5YR 3/3) moist; weak very fine granular structure; soft, very friable, slightly sticky and nonplastic; many very fine, fine, and medium roots; few fine irregular pores; 10 percent gravel, 30 percent cobbles, and 5 percent stones; moderately acid (pH 6.0); clear smooth boundary

A2--13 to 30 cm; extremely cobbly loam, brown (7.5YR 4/4) dry, dark reddish brown (5YR 3/3) moist; weak fine subangular blocky structure, slightly hard, very friable, slightly sticky and nonplastic; few fine roots and few fine irregular pores; 50 percent cobbles and 20 percent stones; slightly acid (pH 6.4); abrupt wavy boundary

R--30 cm; basalt

TYPE LOCATION: Klickitat County, Washington; about 500 m west and 700 m south of the northeast corner of section 14, T. 6 N., R. 16 E.; latitude 46.0051573, longitude -120.7659667, datum WGS 84 (coordinates estimated from section, township, and range)

RANGE IN CHARACTERISTICS:
Depth to lithic contact--25 to 50 cm
Average rock fragment content in particle-size control section--40 to 75 percent
Base saturation--50 to 75 percent throughout
Reaction--5.6 to 6.5
Thickness of mollic epipedon--25 to 38 cm
Soil moisture--dry 45 to 60 consecutive days

A1 horizon
Hue--5YR to 10YR
Value--4 or 5 dry, 2 or 3 moist
Chroma--2 to 4 dry, 1 to 3 moist
Thickness--10 to 25 cm

A2 horizon
Hue--5YR to 10YR
Value--4 or 5 dry
Chroma--2 to 4 dry, 3 or 4 moist
Fine-earth texture--loam, sandy loam, fine sandy loam
Rock fragment content--60 to 75 percent
Thickness--15 to 25 cm

COMPETING SERIES: None

GEOGRAPHIC SETTING:
Elevation--1425 to 2050 m
Climate--cool, dry summers; cold, moist winters; snowpack from November through April
Mean annual precipitation--890 to 1300 mm
Mean January air temperature--about -6 degrees C
Mean July air temperature--about 16 degrees C
Mean annual air temperature--about 4 to 6 degrees C
Growing season (-2 degrees C)--100 to 170 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Grandpon, Satus--frigid soil temperature regime
Pird, Wakshum--no lithic contact within a depth of more than 150 cm

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--moderately high

USE AND VEGETATION:
Use--wildlife habitat, watershed
Native vegetation--ceanothus, pachystima, scattered subalpine fir, elk sedge, common snowberry

DISTRIBUTION AND EXTENT: East slopes of the Cascade Mountains; MLRA 6; small extent

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

SERIES ESTABLISHED: Yakama Nation, Klickitat County, Washington; 2014

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Mollic epipedon--zone from the surface to a depth of 30 cm
*Depth to lithic contact--30 cm

The type location of the Milling series was moved to Klickitat County, within the boundary of the Yakama Nation.

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National Cooperative Soil Survey
U.S.A.