LOCATION SEASTRAND               WA

Established Series
Rev. RVM/RFP/
02/2017

SEASTRAND SERIES

Landscape--coastal plains
Landform--interdunes, depressions
Slope--0 to 2 percent
Parent material--moderately decomposed organic material over tidal alluvium
Mean annual precipitation--2000 mm
Mean annual air temperature--9 degrees C
Depth class--very deep
Drainage class--very poorly drained
Soil moisture regime--aquic
Soil temperature regime--isomesic
Soil moisture subclass--typic

TAXONOMIC CLASS: Sandy or sandy-skeletal, mixed, dysic, isomesic Terric Haplohemists

TYPICAL PEDON: Seastrand mucky peat under scattered western redcedar and Sitka spruce, on a level interdune at an elevation of 3 m (Textures are apparent field textures. When described, the soil was moist throughout.)

Oe1--0 to 15 cm; mucky peat, black (10YR 2/1) broken face, rubbed and pressed, moist; weak fine granular structure; many fine and medium and common coarse roots; extremely acid (pH 3.8 in water); clear smooth boundary

Oe2--15 to 38 cm; mucky peat, very dark brown (10YR 2/2) broken face and moist, black (10YR 2/1) rubbed and pressed, moist; weak thin platy structure; common fine and medium roots, few coarse roots; extremely acid (pH 4.0 in water); gradual smooth boundary

Oe3--38 to 76 cm; mucky peat, dark reddish brown (5YR 3/2) broken face and moist, dark reddish brown (5YR 2.5/2) rubbed and pressed, moist; weak coarse subangular blocky structure; few fine, medium, and coarse roots; very strongly acid (pH 5.0 in water); abrupt smooth boundary

2Cg--76 to 150 cm; sand, gray (5Y 5/1) dry, dark grayish brown (10YR 4/2) moist; single grain; loose, nonsticky and nonplastic; few fine roots; very strongly acid (pH 5.0 in water)

TYPE LOCATION: About 225 m north and 430 m west of the southeast corner of section 6, T. 15 N., R. 11 W., Willamette Meridian; latitude 46.8110140 degrees north, longitude -124.0873760 degrees west, WGS 84 (coordinates estimated from historical location description)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 11 degrees C
Depth to terric feature--45 to 125 cm
Reaction (pH measured in water)--3.5 to 5.0
Organic material--moderately decomposed sedges or rushes

Oe horizon
Hue--10YR, 7.5YR, 5YR
Value--2 to 3 moist
Chroma--1 to 4 moist
Fibers--35 to 70 percent unrubbed, 15 to 35 percent rubbed

2Cg horizon
Hue--10YR, 5Y
Value--4 or 5 moist or dry
Chroma--1 or 2 moist or dry
Rock fragment content--0 to 15 percent gravel

COMPETING SERIES:
Bergsvik--15 to 50 percent rubbed fiber content; hue of 7.5YR to 2.5Y in C horizon; ranges to fine sand in C horizon

GEOGRAPHIC SETTING:
Elevation--0 to 8 m
Climate--marine; cool, moist summers; cool, wet winters
Mean annual precipitation--1500 to 2500 mm
Mean annual air temperature--7 to 10 degrees C
Frost-free period--160 to 220 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Netarts, Newskah, Willapa--mineral soil material; on adjacent hillslopes and terraces
Orcas--90 to 95 percent fibric material; no terric feature; in nearby depressions
Westport--mineral soil material; on adjacent coastal dunes
Yaquina--mineral soil material; in nearby interdunal depressions

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--very poorly drained
Saturation in normal years--saturated to the soil surface in all months unless drained
Flooding--rare
Ponding--long, frequent periods in January through December
Saturated hydraulic conductivity (Ksat)--high in Oe horizon, very high in 2Cg horizon

USE AND VEGETATION:
Use--wildlife habitat, commercial cranberry production, pasture
Potential natural vegetation--Sitka spruce, western redcedar, slough sedge, tule, common spikerush, narrowleaf bur-reed, panicled bulrush

DISTRIBUTION AND EXTENT: Olympic Peninsula coast, Washington; MLRA 4; small extent

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

SERIES ESTABLISHED: Pacific County, Washington; 1978

REMARKS:
Diagnostic horizons and other features in this pedon
*Terric feature--zone from 76 to 150 cm
*Hemic material--zone from the surface to a depth of 76 cm
*Particle-size control section--zone from 76 to 106 cm
*Histosols control section--zone from the surface to a depth of 130 cm

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National Cooperative Soil Survey
U.S.A.