LOCATION IRELY WA
Tentative Series
IRD. MGR/AJF/MPR
01/2025
IRELY SERIES
Landscape--mountains
Landform--colluvial aprons, glacial valley walls, and moraines
Slope--15 to 80 percent
Parent material--colluvium from metasedimentary rock
Mean annual precipitation--about 2250 mm
Mean annual air temperature--about 10 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--mesic
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy-skeletal, isotic, mesic Andic Haplorthods
TYPICAL PEDON: Irely gravelly loam on a south facing, forested moraine with a slope of 22 percent and elevation of 300 m. (The soil was moist throughout when described.)
Oi--0 to 2 cm; slightly decomposed plant material; abrupt smooth boundary
Oe--2 to 9 cm; moderately decomposed plant material; abrupt smooth boundary
E--9 to 16 cm; light gray (10YR 7/2) dry, grayish brown (10YR 5/2) gravelly loam; weak fine granular structure; slightly hard, friable, moderately sticky, moderately plastic; weakly smeary; common very fine and fine roots; common very fine irregular and few very fine tubular pores; 25 percent gravel; extremely acid (pH 3.9); clear wavy boundary
Bs1--16 to 49 cm; brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) very gravelly loam; moderate very fine subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; weakly smeary; few very fine and common fine and medium roots; common very fine and fine tubular pores; 30 percent gravel, 10 percent cobbles, 5 percent stones; extremely acid (pH 4.3); clear wavy boundary
Bs2--49 to 72 cm; strong brown (7.5YR 5/6) dry, strong brown (7.5YR 4/6) very gravelly loam; weak fine subangular blocky structure; soft, very friable, moderately sticky, moderately plastic; few very fine and fine roots; few very fine and fine tubular pores; 30 percent gravel, 5 percent cobbles; extremely acid (pH 4.4); abrupt wavy boundary
Bw--72 to 150 cm; brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) very gravelly loam; weak fine subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; few very fine and fine roots; few very fine tubular pores; 35 percent gravel, 15 percent cobbles, 5 percent stones; very strongly acid (pH 4.6); clear smooth boundary
TYPE LOCATION: Jefferson County, Washington, on the Quinault River trail about a half mile from Graves Creek trailhead in the Olympic National Park.
Latitude--47.5848827
Longitude-- -123.5590616
Datum--WGS84
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 13 degrees C
Albic horizon thickness--4 to 10 cm
Spodic horizon thickness--40 to 70 cm
Particle-size control section
*Clay content--8 to 17 percent
*Total rock fragment content--35 to 60 percent
*Gravel content--15 to 50 percent
*Cobble content--0 to 30 percent
*Stone content--0 to 20 percent
O horizons
Combined thickness--3 to 15 cm
E horizon
Value--4 to 6 moist, 5 to 7 dry
Chroma--1 or 2 moist or dry
Fine-earth texture--silt loam, loam, sandy loam
Clay content--8 to 17 percent
Total rock fragment content--10 to 40 percent
Gravel content--10 to 35 percent
Cobble content--0 to 15 percent
Reaction--3.5 to 4.4
Thickness--4 to 10 cm
Bs1 and Bs2 horizons
Hue--7.5YR or 10YR
Value--3 to 5 moist, 4 or 6 dry
Chroma--4 to 8 dry or moist
Fine-earth texture--silt loam, loam, or sandy loam
Clay content--8 to 17 percent
Total rock fragment content--35 to 60 percent
Gravel content--150 to 5030 percent
Cobble content--015 to 3040 percent
Stone content--0 to 20 percent
Reaction--3.5 to 4.4
Combined thickness--40 to 70 cm
Bw horizon
Hue--10YR or 7.5YR
Value--3 to 5 moist, 4 to 6 dry
Chroma--3 or 4 moist or dry
Fine-earth texture--silt loam, loam, or sandy loam
Clay content--8 to 17 percent
Total rock fragment content--35 to 60 percent
Gravel content--15 to 50 percent
Cobble content--0 to 30 percent
Stone content--0 to 20 percent
Reaction--4.5-5.5
Thickness--60 to 90 cm
COMPETING SERIES:
None
GEOGRAPHIC SETTING:
Elevation--300 to 800 m
Climate--warm, dry summers; mild, wet winters
Mean annual precipitation--1750 to 2750 mm
Mean annual air temperature--8 to 12 degrees C
Frost-free period--180 to 240 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Mountdeception--cambic horizon present; no spodic or albic horizons; similar landforms
Butlercreek--aquic conditions within 25 to 50 cm of mineral soil surface; depressions on similar landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturation in normal years-none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high or very high throughout
USE AND VEGETATION:
Use--wildlife habitat, recreation
Potential natural vegetation--western hemlock, Douglas-fir, salmonberry, oval-leaf blueberry, western swordfern, threeleaf foamflower
DISTRIBUTION AND EXTENT: Olympic Mountains, Washington; MLRA 1; large extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Olympic National Park, Jefferson County, Washington 2023; name from Irely lake in Olympic National Park
REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 34 to 109 cm
*Ochric epipedon
*Albic horizon--zone from 9 to 16 cm
*Spodic horizon--zone from 16 to 72 cm
*Andic subgroup feature--zone from 9 to 49 cm; AO extractable Al plus Fe is 1 to 2 percent and Db is 0.9 to 1.0 g/cm3
National Cooperative Soil Survey
U.S.A.