LOCATION LOLOCREEK WA
Tentative Series
IRD. AJF/MGR/MPR
01/2025
LOLOCREEK SERIES
Landscape--river valley
Landform--terrace
Slope--0 to 30 percent
Parent material--alluvium
Mean annual precipitation--about 2500 mm
Mean annual air temperature--about 6 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime-- udic
Soil temperature regime--frigid
Soil moisture subclass--typic
TAXONOMIC CLASS: Sandy-skeletal, mixed, frigid Typic Dystrudepts
TYPICAL PEDON: Lolocreek sandy loam on alluvial terrace with slope of 1 percent and elevation of 910 m. (The soil was moist throughout when described.)
Oi--0 to 3cm; slightly decomposed plant material; abrupt wavy boundary
A--3 to 9 cm; very dark grayish brown (10YR 3/2) dry, very dark gray (10YR 3/1) sandy loam; moderate medium granular structure; soft, very friable, non-sticky, non-plastic; few very fine and fine roots; few fine tubular and irregular pores; 5 percent gravel; very strongly acid (pH 4.6); clear smooth boundary
Bw1--9 to 26 cm; brown (10YR 4/3) dry, very dark grayish brown (10YR 3/2) sandy loam; weak very fine subangular blocky structure; soft, very friable, non-sticky, non-plastic; few fine and medium roots; few fine irregular and interstitial pores; 10 percent gravel; very strongly acid (pH 4.7); abrupt smooth boundary
Bw2--26 to 34 cm; dark grayish brown (10YR 4/2) dry, very dark gray (10YR 3/1) very gravely loamy coarse sand; weak very fine subangular blocky structure; soft, very friable, non-sticky, non-plastic; few very fine roots; common fine interstitial pores; 40 percent gravel; very strongly acid (pH 4.8); abrupt smooth boundary
Bw3--34 to 41 cm; grayish brown (10YR 5/2) dry, dark gray (10YR 4/1) very gravely loam; weak very fine subangular blocky structure; soft, very friable, non-sticky, non-plastic; few fine and medium roots; few fine irregular and common medium interstitial pores; 40 percent gravel; very strongly acid (pH 4.9); abrupt smooth boundary
C--41 to 150 cm; dark grayish brown (10YR 4/2) dry, very dark gray (10YR 3/1) extremely gravely loamy coarse sand; single grain structure; loose, loose, non-sticky, non-plastic; common medium interstitial pores; 75 percent gravel; strongly acid (pH 5.1)
TYPE LOCATION: Olympic National Park, Clallam County, Washington; Gray Wolf River Trail, across river from Camp Ellis.
Latitude--47.881024
Longitude-- -123.248883
Datum--WGS84
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--5 to 8 degrees C
Mean summer soil temperature--6 to 10 degrees C
Particle size control section
*Clay content--3 to 15 percent
*Total rock fragment content--35 to 80 percent
*Gravel content--35 to 80 percent
*Cobble content--0 to 5 percent
A horizon
Hue--10YR or 7.5YR
Value-- 2 to 4 dry or moist
Chroma--1 or 2 dry or moist
Fine-earth texture--sandy loam, loam
Clay content--5 to 15 percent
Gravel content--0 to 15 percent
Reaction--4.5 to 5.5
Thickness--5 to 15 cm
Bw1 horizon
Hue--10 YR
Value--3 to 5 dry or moist
Chroma--1 or 2 dry or moist
Fine-earth texture--sandy loam, loamy sand
Clay content--3 to 15 percent
Gravel content--0 to 15 percent
Reaction--4.5 to 5.5
Thickness--15 to 30 cm
Bw2 and Bw3 horizons
Hue--10 YR
Value--3 to 5 dry or moist
Chroma--1 or 2 dry or moist
Fine-earth texture--sandy loam, loam
Clay content--3 to 15 percent
Gravel content--35 to 60 percent
Reaction--4.5 to 5.5
Combined thickness--15 to 50 cm
C horizon
Hue--10 YR
Value--3 to 5 dry or moist
Chroma--1 or 2 dry or moist
Fine-earth texture--sandy loam, loamy sand
Clay content--3 to 15 percent
Total rock fragment content--50 to 80 percent
Gravel content--50 to 85 percent
Cobble content--0 to 5 percent
Reaction--4.5 to 5.5
Thickness--50 to 100 cm
COMPETING SERIES: None
GEOGRAPHIC SETTING:
Elevation--450 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:
Lapoetcreek--coarse loamy particle size class; occurs on terraces with very rare flooding
Steeplerock--no cambic diagnostic horizon; occurs on terraces with frequent flooding
Mountscott--aquic conditions within 50 cm of the mineral soil surface; occurs on depressions on similar landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class-- well drained
Saturation in normal years--none
Flooding--very rare
Ponding--none
Saturated hydraulic conductivity (Ksat)--high or very high throughout
USE AND VEGETATION:
Use--wildlife habitat, recreation
Potential natural vegetation-Pacific silver fir, western hemlock, Douglas-fir, bigleaf maple, vine maple, western swordfern, oval-leaf huckleberry, salmonberry pacific swordfern, three-leaf foamflower, youth on age
DISTRIBUTION AND EXTENT: Olympic Mountains, Washington; MLRA 1; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Olympic National Park, Jefferson County, Washington 2023; name from Lolo Creek in Olympic National Park
REMARKS:
Diagnostic horizons and other features in this pedon:
*Particle-size control section--zone from 28 to 103 cm
*Ochric epipedon
*Cambic horizon--zone from 9 to 41 cm
National Cooperative Soil Survey
U.S.A.