LOCATION FIVELAKES WAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Ultic Haploxerolls
TYPICAL PEDON: Fivelakes extremely bouldery loam - on a south facing 3 percent slope at 2,500 feet elevation under a canopy of grasses and a few shrubs. (Colors are for dry soil unless otherwise noted).
A1--0 to 4 inches; grayish brown (10YR 5/2) extremely bouldery loam, very dark grayish brown (10YR 3/2, moist) weak fine subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; many very fine roots, few fine roots; 35 percent boulders; 5 percent pebbles, 15 percent cobbles, 10 percent stones; neutral (pH 6.6); clear wavy boundary.
A2--4 to 12 inches; grayish brown (10YR 5/2) very bouldery loam, very dark grayish brown (10YR 3/2, moist) weak medium subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; many very fine roots, few fine roots; 5 percent pebbles, 15 percent cobbles, 10 percent stones, 15 percent boulders, neutral (pH 6.8); clear wavy boundary (combined thickness of the A horizon is 9 to 16 inches)
Bw1--12 to 18 inches; light yellowish brown (10YR 6/4) very stony loam, dark yellowish brown (10YR 4/4, moist) weak medium subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; common very fine roots, few fine roots; 5 percent pebbles, 20 percent cobbles, 15 percent stones, 5 percent boulders; neutral (pH 6.8); clear irregular boundary.
Bw2--18 to 30 inches; light yellowish brown (10YR 6/4) very stony sandy loam; dark yellowish brown (10YR 4/4, moist) weak medium subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; common very fine roots, few fine roots; 20 percent pebbles, 10 percent cobbles, 15 percent stones, 5 percent boulders; neutral (pH 7.0); abrupt wavy boundary. (combined thickness of the B horizon is 7 to 24 inches)
C--30 to 60 inches; multicolored extremely cobbly coarse sand; single grained, loose, nonsticky, nonplastic; 35 percent pebbles, 20 percent cobbles, 5 percent stones; neutral (pH 7.0).
TYPE LOCATION: Colville Indian Reservation; Okanogan County, Washington; about nine miles southeast of the town of Nespelem; 500 feet north, 1,500 feet west of the southeast corner of section 18, T. 30 N., R. 31 E., W.M.
RANGE IN CHARACTERISTICS: The mean annual soil temperature at a depth of 20 inches ranges from 49 to 51 degrees F. These soils are usually moist but are dry in all parts between depths of 8 and 24 inches for 90 to 105 consecutive days following the summer solstice. The mollic epipedon is 9 to 15 inches thick. The upper 7 to 14 inches has an estimated moist bulk density of 1.35 to 1.60 g/cc, volcanic glass content of 5 to 20 percent, acid-oxalate extractable aluminum plus one-half of the acid-oxalate extractable iron of 0.25 to 0.35 percent, and 15-bar water retention of 5 to 10 percent for air dried samples. Depth to sandy-skeletal material ranges from 20 to 36 inches. The particle-size control section is 35 to 60 percent rock fragments by weighted average.
The upper part of the A horizon has value of 4 oe 5 dry, 2 or 3 moist, and chroma of 2o r 3 dry or moist. It is fine sandy loam, stony fine sandy loam, stony loam, extremely bouldery loam, or extremely bouldery sandy loam. It is 0 to 25 percent pebbles, 0 to 35 percent cobbles, 0 to 45 percent stones and boulders.
The lower part of the A horizon has value of 4 or 5 dry, 2 or 3 moist, and chroma of 2 or 3 dry or moist. It is fine sandy loam, sandy loam, or very gravelly loam, and stony, bouldery or very bouldery gravelly. It is 0 to 25 percent pebbles, 0 to 10 percent cobbles, 0 to 5 percent stones, and 0 to 15 percent boulders.
The Bw horizon has value of 5 or 6 dry, 3 through 5 moist, and chroma of 3 or 4 dry or moist. It is sandy loam, fine sandy loam, or loam and is gravelly, very gravelly cobbly, stony, or very stony. It is 5 to 30 percent pebbles, 10 to 25 percent cobbles, 0 to 25 percent stones and boulders.
The C horizon is multicolored or has hue of 10YR, value of 6 or 7 dry, 4 through 6 moist, and chroma of 3 or 4 dry or moist. It is loamy sand, sand, loamy coarse sand, or coarse sand and is very gravelly, extremely gravelly, very cobbly, or extremely cobbly. It is 30 to 70 percent pebbles, 5 to 45 percent cobbles, and 0 to 5 percent stones. Reaction is neutral or mildly alkaline.
COMPETING SERIES: These are the Bald, Borgeau, Briedwell, Burnscreek (T), Garrison, Lenz, Louiecreek, Lyville (T), McCrosket, Northstar, Rockford, Spokel, Suta, and Vanbrunt soils. Bald, Lenz, Northstar, Vanbrunt, and Wynhoff soils are 20 to 40 inches deep to a lithic contact. Bluenose soils have a Bt horizon, mean annual soil temperature of 52 to 54 degrees F and lack sandy-skeletal material in the lower part of the particle-size control section. Borgeau, Briedwell, Burnscreek, Louiecreek, McCrosket, and Spokel soils are loamy-skeletal throughout the particle-size control section. Garrison soils have a mean annual soil temperature of 47 to 49 degrees F and are dry between depths of 8 and 24 inches for 60 to 90 consecutive days following the summer solstice. Geppert soils are 20 to 40 inches deep to paralithic contact. Lyville, Rockford, and Suta soils lack sandy-skeletal material in the lower part of the particle-size control section and have hue of 7.5YR or 5YR in the B horizon. Whitestone soils have a mean annual soil temperature of 47 to 49 degrees F, and are formed in granitic colluvium with angular granitic rock fragments.
GEOGRAPHIC SETTING: Fivelakes soils are on outwash terraces and terrace escarpments at elevations of 1,200 to 2,700 feet. Slopes are 0 to 65 percent. These soils are formed in glacial outwash with a component of loess and volcanic ash in the upper part. The climate is characterized by warm, dry summers and cool, moist winters. The average precipitation is 12 to 15 inches. The mean January temperature is about 25 degrees F, the mean July temperature is about 71 degrees F, and the mean annual air temperature is 47 to 49 degrees F. The frost-free season is 110 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Conconully, Ewall, Haley, Hobohill, Nespelem, Owhi, and Picard soils. Ewall and Hobohill soils have sandy particle-size control section. Conconully, Owhi, and
Picard soils are coarse-loamy. Haley soils are coarse-loamy over sandy or sandy-skeletal. Nespelem soils are coarse-silty and have a weak duripan in the particle-size control section.
DRAINAGE AND PERMEABILITY: Well to moderately well drained; slow to rapid runoff; moderately rapid permeability in the solum, very rapid permeability in the substratum.
USE AND VEGETATION: Livestock grazing, wildlife habitat, watershed, recreation, irrigated hay and pasture are the principal uses. Native vegetation is bluebunch wheatgrass, Sandberg bluegrass, needleandthread, threetip sagebrush, Wyeth buckwheat, silky lupine, hood phlox, arrowleaf balsamroot, ballhead sandwort, and low pussytoes.
DISTRIBUTION AND EXTENT: North-central Washington. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Colville Indian Reservation; Okanogan County, Washington, 1987.
REMARKS: Diagnostic horizons and features recognized in this soil are a mollic epipedon from the surface to 12 inches, a cambic horizon from 12 to 30 inches, and a particle-size control section that averages 54 percent rock fragments.