LOCATION MIPPON WA+OR
Established Series
Rev. JTK/HRG/TDT
09/2019
MIPPON SERIES
Landscape--valleys
Landform--stream terraces, flood plains
Slope--0 to 5 percent
Parent material--recent alluvium
Mean annual precipitation--about 760 mm
Mean annual air temperature--about 6 degrees C
Depth class--very deep
Drainage class--moderately well drained
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic
TAXONOMIC CLASS: Sandy-skeletal, mixed, frigid Fluventic Haploxerolls
TYPICAL PEDON: Mippon very cobbly loam, forested
Oe--0 to 3 cm; moderately decomposed forest litter
A--3 to 30 cm; very cobbly loam, very dark grayish brown (10YR 3/2) dry, very dark brown (10YR 2/2) moist; weak very fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine and fine roots; few very fine irregular pores; 20 percent gravel and 40 percent cobbles; neutral (pH 6.6); abrupt smooth boundary
AC--30 to 46 cm; very gravelly sandy loam, brown (10YR 4/3) dry, very dark grayish brown (10YR 3/2) moist; single grain; loose, nonsticky and nonplastic; common very fine and fine roots; 50 percent gravel and 10 percent cobbles; neutral (pH 6.6); gradual wavy boundary
C1--46 to 84 cm; extremely cobbly loamy sand, brown (10YR 4/3) dry, very dark grayish brown (10YR 3/2) moist; single grain; loose; nonsticky and nonplastic; common very fine and fine and few coarse roots; 30 percent gravel and 40 percent cobbles; neutral (pH 6.6); gradual wavy boundary
C2--84 to 155 cm; extremely gravelly sand, brown (10YR 4/3) dry, very dark grayish brown (10YR 3/2) moist; single grain; loose, nonsticky and nonplastic; 60 percent gravel and 10 percent cobbles; neutral (pH 6.6)
TYPE LOCATION: Kittitas County, Washington, about 14.5 km northeast of Ellensburg; about 480 m east and 380 m south of the northwest corner of section 16, T. 19 N., R. 19 E.; Naneum Canyon, Washington, U.S. Geological Survey topographic quadrangle; latitude 47 degrees, 8 minutes, 34 seconds north and longitude 120 degrees, 28 minutes, 11 seconds west; NAD 83
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--about 7 to 8 degrees C
Particle-size control section--50 to 90 percent gravel, cobbles, and stones
Thickness of mollic epipedon--25 to 43 cm
Reaction--6.1 to 7.3
Oe horizon
Thickness--0.5 to 3.0 cm
A horizon
Value--3 to 5 dry, 2 or 3 moist
Chroma--2 or 3 dry, 1 to 3 moist
Texture--loam, silt loam, loamy sand, sandy loam, ashy sandy loam
Rock fragment content--0 to 60 percent gravel, cobbles, and stones
Thickness--25 to 36 cm
AC horizon (where present)
Value--4 to 6 dry
Chroma--3 to 6 dry, 2 to 4 moist
Texture--very cobbly loam, extremely gravelly sand, very gravelly sandy loam, very gravelly coarse sand, very cobbly loamy sand, extremely gravelly loamy sand, extremely cobbly loamy sand
Thickness--0 to 33 cm
C horizon
Value--2 or 3 moist, 4 or 6 dry
Chroma--2 to 4 dry, 2 or 3 moist; multicolored
Texture--extremely cobbly loamy coarse sand, very cobbly loamy sand, extremely cobbly loamy sand, very gravelly loamy sand, extremely gravelly loamy sand, extremely gravelly sand, extremely gravelly coarse sand, extremely cobbly coarse sand, very cobbly sand, extremely gravelly loamy coarse sand; some thin layers of sandy loam in fine-earth fraction
Combined thickness--more than 81 cm
COMPETING SERIES:
Hewolf--cambic horizon
GEOGRAPHIC SETTING:
Elevation--370 to 1475 m
Climate--warm, dry summers; cool, moist winters
Mean annual precipitation--460 to 1000 mm
Mean January air temperature--about -4 degrees C
Mean July air temperature--about 18 degrees C
Mean annual air temperature--about 5 to 7 degrees C
Frost-free season--70 to 170 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Jumpe--on mountains; ochric epipedon
Loneridge, Tepping--on mountains; argillic horizon
Ramparter--on mountains; 25- to 100-cm particle-size control section dominantly volcanic ash and pumice
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--moderately well drained
Saturated hydraulic conductivity (Ksat)--moderately high to very high
Flooding--none to frequent, brief periods in winter and spring
USE AND VEGETATION:
Use--timber production, livestock grazing, wildlife habitat, recreation, watershed, some hay and pasture production
Vegetation--ponderosa pine, Douglas-fir, black cottonwood, grand fir, common snowberry, elk sedge, blackberry, oceanspray, wild rose, yarrow
DISTRIBUTION AND EXTENT: Mountainous areas of Chelan, Kittitas, and Yakima Counties, Washington, and northeastern Oregon; MLRAs 6 and 43C; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Yakima County, Washington; 1979
REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Thickness of mollic epipedon--zone from 3 to 46 cm
*Particle-size control section--zone from 28 to 103 cm
*Organic carbon content--irregular decrease as depth increases
National Cooperative Soil Survey
U.S.A.