LOCATION MUKILTEO                WA

Established Series
Rev. RJE/CRF/EED
10/2018

MUKILTEO SERIES

Landscape--glacial uplands, glacial drift plains, and river valleys
Landform--depressional areas
Slope--0 to 2 percent
Parent material--organic deposits
Mean annual precipitation--about 1400 mm
Mean annual temperature--about 10 degrees C
Depth class--very deep
Drainage class--very poorly drained
Soil moisture regime--aquic
Soil temperature regime--mesic
Soil moisture subclass--typic

TAXONOMIC CLASS: Dysic, mesic Typic Haplohemists

TYPICAL PEDON: Mukilteo muck, pasture

Oa1--0 to 5 cm; muck (sapric material), dark yellowish brown (10YR 4/4) moist; 20 percent fibers, 10 percent rubbed; 70 percent live fine fibrous roots; very strongly acid (pH 4.5 in H20); abrupt smooth boundary

Oa2--5 to 15 cm; muck (sapric material), dark reddish brown (5YR 2/2) moist; 50 percent fibers, 6 percent rubbed; moderate fine angular blocky structure; friable; many fine roots; very strongly acid (pH 4.5 in H20); abrupt smooth boundary

Oe1--15 to 28 cm; mucky peat (hemic material), dark reddish brown (5YR 3/2) moist; 80 percent fibers, 20 percent rubbed; weak fine subangular blocky structure; friable; common fine roots; very strongly acid (pH 4.6 in H20); clear smooth boundary

Oe2--28 to 107 cm; mucky peat (hemic material), dark reddish brown (5YR 3/2) moist; 65 percent fibers, 20 percent rubbed; massive; friable; few fine roots; very strongly acid (pH 4.6in H20); clear smooth boundary

Oe3--107 to 200 cm; mucky peat (hemic material), dark reddish brown (5YR 3/2) moist; 60 percent fibers, 24 percent rubbed; massive; friable; very strongly acid (pH 4.8 in H20)

TYPE LOCATION: Thurston County, Washington; 5 km northeast of Olympia, about 180 m north and 150 m west of the southwest corner of sec. 12, T. 18 N., R. 2 W, Willamette Meridian; Lacey, Washington, U.S. Geological Survey quadrangle; latitude 47.055368 degrees north, longitude 122.865478 degrees west, datum WGS 84 (coordinates estimated from PLSS details)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--10 to 12 degrees C
Reaction (pH in 0.01 M CaCl2)--less than 4.5
Oa horizons
Hue--5YR or 10YR
Value--2 to 4 moist
Chroma--1 to 4 moist
Organic Carbon Content--20 to 80 percent
Fiber content--20 to 60 percent unrubbed, 5 to 10 percent rubbed
Combined thickness--13 to 25 cm

Oe horizons
Hue--5YR to 10YR
Value--2 to 5 moist
Chroma--1 to 4 moist
Organic Carbon Content--5 to 30 percent
Fiber content--60 to 80 percent unrubbed, 16 to 60 percent rubbed
Combined Thickness--130 to 220 cm

COMPETING SERIES:
Napoleon-- mean January temperature of -3 degrees C and a mean July temperature of 22 degrees C
GEOGRAPHIC SETTING:
Elevation--0 to 305 m
Mean annual precipitation--760 to 1780 mm
Mean annual air temperature--9 to 11 degrees C
Frost Free Period--150 to 250 days

GEOGRAPHICALLY ASSOCIATED SOILS:
McKenna, and Norma--mineral soils, occur on depressions and drainageways
Dupont--limnic soil material, reaction (pH in 0.01 M CaCl2) of greater than 4.5, occurs on similar positions
Seattle, Semiahmoo-- reaction (pH in 0.01 M CaCl2) of greater than 4.5, occur on similar positions
Alderwood and Everett--lack aquic conditions within 50 cm, occurs on upslope hills and ridges

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
*Drainage class--Very poorly
*Depth to apparent seasonal water table--at the surface to a depth of 30 cm at times from January to December
*Flooding--none
*Ponding--frequent ponding of long to very long duration at times from January to December
*Saturated hydraulic conductivity (Ksat)--moderate throughout

Ponding and the seasonal high water table in some pedons may be altered by artificial drainage.

USE AND VEGETATION:
Use--hay production, livestock grazing, and wildlife habitat
Native vegetation--red alder, western red cedar, willow, Douglas spirea, salmonberry, red elderberry, devilsclub, ladyfern, cattail, sedges, rushes, and skunkcabbage

DISTRIBUTION AND EXTENT:
This series is of moderate extent in the Puget Sound Basin of western Washington.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Snohomish County, Washington, 1938.

REMARKS:
Diagnostic horizons and other features in this pedon
*Particle size control section--0 to 130 cm
*Surface tier--zone from 0 to 30
*Subsurface tier--zone from 30 to 90 cm
*Bottom tier--90 to 130 cm
*Endosaturation--zone from 0 to 200 cm
*Hemic soil material--zone from 15 cm to 200 cm

03/2018 The Mukilteo official series description was edited according to SSR01 Technical Note--Content and Format of Official Series Descriptions (revised 11/2017). The organic material in which this soil formed can range in thickness to more than 3 m. Fibers are mostly sedges and moss.

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National Cooperative Soil Survey
U.S.A.