LOCATION CHARLIALAKES            WA

Tentative Series
IRD. AJF/MGR/MPR
01/2025

CHARLIALAKES SERIES

Landscape--mountains
Landform--ridge
Slope--15 to 60 percent
Parent material--residuum from metasedimentary rock
Mean annual precipitation--about 2500 mm
Mean annual air temperature--about 6 degrees C
Depth class--moderately deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--frigid
Soil moisture subclass--typic

TAXONOMIC CLASS: Loamy-skeletal, isotic, frigid Typic Dystrudepts

TYPICAL PEDON: Charlialakes loam on a south-facing, forested ridge shoulder with a slope of 35 percent and elevation of 1090 m. (The soil was moist throughout when described.)

Oi--0 to 3 cm; slightly decomposed plant material; abrupt wavy boundary

A--3 to 13 cm; dark brown (7.5YR 3/2) dry, very dark brown (7.5YR 2.5/2) loam; moderate fine granular structure; slightly hard, very friable, non-sticky, slightly plastic; weakly smeary; common very fine and fine, and few medium and coarse roots; common fine tubular pores; 10 percent gravel; very strongly acid (pH 4.6); clear wavy boundary

Bw1--13 to 31 cm; brown (7.5YR 4/3) dry, dark brown (7.5YR 3/3) silt loam; moderate very fine subangular blocky structure; slightly hard, very friable, non-sticky, moderately plastic; weakly smeary; common very fine and fine, and few medium and very coarse roots; few fine irregular pores;10 percent gravel; very strongly acid (pH 4.7); abrupt wavy boundary

Bw2--31 to 54 cm; brown (7.5YR 4/3) dry, dark brown (7.5YR 3/2) very gravelly sandy loam; weak very fine subangular blocky structure; soft, very friable, non-sticky, non-plastic; weakly smeary; few medium and very coarse roots; common very fine interstitial pores; 60 percent gravels, 5 percent cobbles; very strongly acid (pH 4.8); abrupt wavy boundary

R--54 cm; metasedimentary bedrock

TYPE LOCATION: Olympic National Park, Clallam County, Washington, on Aurora Ridge Trail, approximately 3 miles west of Aurora Creek junction
Latitude--48.030408
Longitude-- -123.886905
Datum--WGS84

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--5 to 8 degrees C
Mean summer soil temperature--6 to 10 degrees C
Depth to restrictive layer--50 to 100 cm
Umbric epipedon thickness--20 to 30 cm

Particle size control section
*Clay content--8 to 17 percent
*Total rock fragment content--35 to 70 percent
*Gravel content--35 to 60 percent
*Cobble content--0 to 30 percent

O horizon
Thickness--0 to 10 cm

A and Bw1 horizons
Hue--10YR or 7.5YR
Value--2 to 4 dry or moist
Chroma--1 to 3 dry or moist
Fine-earth texture--silt loam, loam
Clay content--8 to 17 percent
Gravel content-0 to 15 percent
Reaction-4.5 to 5.5
Combined Thickness--20 to 40 cm

Bw2 horizon
Hue--10YR or 7.5YR
Value--2 to 4 dry or moist
Chroma--2 to 4 dry or moist
Fine-earth texture--silt loam, loam, sandy loam
Clay content-6 to 15 percent
Total rock fragment content--35 to 70 percent
Gravel content--35 to 70 percent
Cobble content--0 to 15 percent
Reaction--4.5 to 5.5
Thickness--20 to 40 cm

COMPETING SERIES:
Chintimini and Hoffstadt--lithic contact below 100 cm from the soil surface
Sarazan--lithic contact below 150 cm from the soil surface
Indianpass--lithic contact below 150 cm from the soil surface and has albic horizon

GEOGRAPHIC SETTING:
Elevation--500 to 1100 m
Climate--warm, dry summers; cool, wet winters
Mean annual precipitation--2000 to 3000 mm
Mean annual air temperature--7 to 11 degrees C
Frost-free period--90 to 150 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Skookumcreek--very deep; glacial-valley wall landform
Bonjonpass--contains albic and spodic horizons, very deep; glacial-valley wall landform
Beecreek--Lithic contact within 50 cm of soil surface; similar landforms
Mountscott--aquic conditions within 50 cm of the 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-Pacific silver fir, Douglas-fir, western hemlock, oval-leaf huckleberry, red huckleberry, twinflower, sidebells wintergreen

DISTRIBUTION AND EXTENT: Olympic Mountains, Washington; MLRA 1; small extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana

SERIES PROPOSED: Olympic National Park, Clallam County, Washington 2023; name from Charlia Lakes in Olympic National Forest

REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 28 to 54 cm
*Umbric epipedon--zone from 3 to 31 cm
*Andic subgroup properties--zone from 3 to 54 cm; AO extractable Al + FE is 1 to 2 percent and Db is 0.9 to 1.0
*Cambic horizon--zone from 31 to 54 cm

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National Cooperative Soil Survey
U.S.A.