LOCATION TOLEAK WA
Established Series
IRD. EED/
07/2017
TOLEAK SERIES
Landscape--coastal plains
Landform--marine terraces
Slope--0 to 30 percent
Parent material--loess and stratified marine deposits
Mean annual precipitation--2250 mm
Mean annual air temperature--8 degrees C
Depth class--very deep
Drainage class--somewhat poorly drained
Soil moisture regime--aquic
Soil temperature regime--isomesic
Soil moisture subclass--typic
TAXONOMIC CLASS: Medial, ferrihydritic, acid, isomesic Typic Endoaquands
TYPICAL PEDON: Toleak medial silt loam on a forested, southwest-facing, 7-percent slope at an elevation of about 75 m (When described on July 25, 2015, the soil was moist below a depth of 35 cm and dry above that depth)
Oi--0 to 7 cm; slightly decomposed plant material; abrupt wavy boundary
A--7 to 22 cm; medial silt loam, dark brown (7.5YR 3/3) dry, very dark brown (7.5YR 2.5/2) moist; strong fine granular structure; slightly hard, very friable, moderately sticky and moderately plastic; moderately smeary; common very fine, fine, medium, and coarse roots; common fine irregular pores; very strongly acid (pH 4.6); abrupt wavy boundary
AB--22 to 35 cm; medial silt loam, dark brown (7.5YR 3/4) dry, dark brown (7.5YR 3/3) moist; strong fine granular structure; slightly hard, very friable, moderately sticky and moderately plastic; moderately smeary; common fine and medium and few coarse roots; common fine tubular and irregular pores; very strongly acid (pH 4.8); clear wavy boundary
Bg1--35 to 48 cm; medial silt loam, dark yellowish brown (4/4) dry, dark brown (10YR 3/3) moist; strong fine subangular blocky structure; moderately hard, friable, moderately sticky and moderately plastic; moderately smeary; few fine, medium, and coarse roots; common fine irregular pores; 15 percent medium prominent irregular masses of oxidized iron with clear boundaries in matrix, dark grayish brown (10YR 4/2) moist, and 15 percent medium faint irregular masses of reduced iron with diffuse boundaries in matrix, strong brown (7.5YR 5/6) moist; strongly acid (pH 5.4); clear wavy boundary
Bg2--48 to 66 cm; medial silt loam, light yellowish brown (2.5Y 6/4) dry, light olive brown (2.5Y 5/4) moist; moderate medium subangular blocky structure; moderately hard, friable, moderately sticky and moderately plastic; moderately smeary; few fine and very fine roots; common fine irregular pores; 20 percent fine prominent irregular masses of oxidized iron with diffuse boundaries in matrix, yellowish red (5YR 4/6) moist, and 35 percent medium distinct irregular masses of reduced iron with clear boundaries in matrix, light olive gray (5Y 6/2) moist; strongly acid (pH 5.2); clear wavy boundary
Bg3--66 to 80 cm; medial silty clay loam, light olive gray (5Y 6/2) dry, olive gray (5Y 5/2) moist; strong medium subangular blocky structure; moderately hard, friable, moderately sticky and moderately plastic; moderately smeary; few fine roots; common fine irregular pores; 30 percent medium prominent irregular masses of oxidized iron with clear boundaries in matrix, yellowish red (5YR 4/6) moist; strongly acid (pH 5.4); clear wavy boundary
Bg4--80 to 110 cm; medial silty clay loam, yellowish brown (10YR 5/6) dry, dark yellowish brown (10YR 4/6) moist; strong medium subangular blocky structure; moderately hard, friable, moderately sticky and moderately plastic; moderately smeary; few fine roots; common fine irregular pores; 25 percent coarse prominent irregular masses of oxidized iron with clear boundaries in matrix, yellowish red (5YR 5/8) moist, and 25 percent medium prominent irregular masses of reduced iron with clear boundaries in cracks, olive gray (5Y 5/2) moist; strongly acid (pH 5.4); abrupt smooth boundary
C--110 to 150 cm; silt loam, light olive gray (5Y 6/2) dry, olive gray (5Y 5/2) moist; massive; hard, firm, moderately sticky and moderately plastic; nonsmeary; common fine irregular pores; 5 percent fine prominent irregular masses of oxidized iron with clear boundaries in cracks, yellowish red (5YR 5/8) moist; moderately acid (pH 5.8)
TYPE LOCATION: Clallam County, Washington, about 365 m west-southwest of the Third Beach parking lot on State Route 110, in Olympic National Park; about 650 m south and 415 m east of the northwest corner of section 35, T. 28 N., R. 15 W., Willamette Meridian; latitude 47.8897233 degrees north, longitude -124.6053778 degrees west, WGS 84 (GPS coordinates)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 10 degrees C
Depth to redoximorphic features--25 to 50 cm below the mineral soil surface
Control section
*Rock fragment content--0 to 15 percent
*Bulk density--0.70 to 0.90 g/cm3
*Ammonium oxalate extractable aluminum plus one-half iron--2 to 5 percent
*Phosphate retention--85 to 100 percent
Oi horizon
*Thickness--3 to 10 cm
A horizon
*Value--2 to 3 moist, 3 to 5 dry
*Chroma--1 to 3 moist or dry
*Organic matter content--10 to 20 percent
*Clay content--15 to 25 percent (field estimate)
*Reaction--4.5 to 5.5
*Thickness--10 to 15 cm
AB horizon
*Hue--7.5YR, 10YR
*Value--2 to 3 moist, 3 to 5 dry
*Chroma--1 to 3 moist or dry
*Organic matter content--10 to 20 percent
*Clay content--18 to 27 percent (field estimate)
*Reaction--4.5 to 5.5
*Thickness--10 to 20 cm
Bg horizon
*Hue--10YR, 2.5Y, 5Y
*Value--3 to 5 moist, 4 to 6 dry
*Chroma--2 to 6 moist or dry
*Organic matter content--1 to 7 percent
*Clay content--20 to 30 percent (field estimate)
*Fine-earth texture--medial silt loam, medial silty clay loam
*Reaction--4.5 to 5.5
*Combined thickness--50 to 100 cm
C horizon
*Hue--2.5Y, 5Y
*Value--4 or 5 moist, 5 or 6 dry
*Chroma--2 to 4 moist or dry
*Organic matter content--0 to 2 percent
*Clay content--20 to 30 percent (field estimate)
*Fine-earth texture--medial silt loam, medial silty clay loam
*Reaction--5.1 to 6.0
COMPETING SERIES: None
GEOGRAPHIC SETTING:
Elevation--10 to 185 m
Climate--marine; cool, moist summers; cool, wet winters
Mean annual precipitation--1800 to 3050 mm
Mean annual air temperature--7 to 9 degrees C
Frost-free period--160 to 220 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Calawah--no aquic conditions; on similar landforms
Willapa--aquic conditions 50 to 100 cm from the soil surface; on similar landforms
Tealwhit--aquic conditions within 25 cm of the soil surface; in depressions and drainageways
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--somewhat poorly drained
Saturation in normal years--saturated below a depth of 30 to 40 cm in November through April and below a depth of 100 cm in May through October
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high or moderately high in A, AB, and Bg horizons; moderately low in C horizon
USE AND VEGETATION:
Use--wildlife habitat, recreation, timber production, homesite development
Potential natural vegetation--Sitka spruce, western hemlock, western redcedar, evergreen huckleberry, red huckleberry, deer fern, western swordfern, salal
DISTRIBUTION AND EXTENT: Olympic Peninsula coast, Washington; MLRA 4; small extent
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Olympic National Park, Jefferson County, Washington, 2017; name from Toleak Point
REMARKS:
Diagnostic horizons and other features in this pedon
*Umbric epipedon--zone from 7 to 48 cm
*Cambic horizon--zone from 48 to 150 cm
*Particle-size control section--zone from 7 to 107 cm
*Andic soil properties--zone from 7 to 110 cm
*Aquic conditions--zone from 35 to 150 cm
*Redoximorphic iron concentrations--zone from 35 to 150 cm
*Redoximorphic iron depletions with chroma of 2 or less--zone from 35 to 110 cm
National Cooperative Soil Survey
U.S.A.