LOCATION HOVARKA            UT
Established Series
Rev. DLT/MJD/TWH
08/2000

HOVARKA SERIES


The Hovarka series consists of very deep, poorly drained soils that formed in alluvium derived from sandstone and quartzite. Hovarka soils are on floodplains. Slopes range from 0 to 2 percent. Mean annual precipitation is about 25 inches and the mean annual temperature is about 36 degrees F.

TAXONOMIC CLASS: Fine-loamy over sandy or sandy-skeletal, mixed, superactive Cumulic Cryaquolls

TYPICAL PEDON: Hovarka loam, on a north facing concave, 1 percent slope in a wet meadow at an elevation of 7,840 feet. (Colors are for moist soil unless otherwise noted.) When described on August 27, 1996, the soil was moist throughout.

Oi--0 to 4 inches; slightly decomposed leaves, twigs, and roots.

A1--4 to 12 inches; very dark brown (10YR 2/2) loam, dark grayish brown (10YR 4/2) dry; weak fine granular structure; friable, slightly hard, slightly sticky and slightly plastic; many very fine, common fine and few coarse roots; many very fine tubular pores; 5 percent gravel and 5 percent cobbles; common medium distinct strong brown (7.5YR 5/6) iron concentrations; slightly acid (pH 6.2); clear smooth boundary (5 to 15 inches thick).

A2--12 to 32 inches; black (10YR 2/1) loam, dark gray (10YR 4/1) dry; weak fine subangular blocky structure; hard, friable, moderately sticky and moderately plastic; many very fine and few fine roots; many very fine tubular pores; 5 percent gravel and 5 percent cobbles; many fine distinct brown (7.5YR 5/4) iron concentrations; slightly acid (pH 6.2); clear wavy boundary (10 to 20 inches thick).

2C1--32 to 36 inches; gray (10YR 5/1) very cobbly loamy sand, gray (10YR 6/1) dry; single grain; loose, nonsticky and nonplastic; few very fine roots and many very fine interstitial pores; 30 percent gravel and 20 percent cobbles; slightly acid (pH 6.4); clear wavy boundary (4 to 10 inches thick).

2C2--36 to 64 inches; gray (10YR 5/1) very cobbly sand, gray (10YR 6/1) dry; single grain; loose, non sticky and non plastic; few very fine roots and many very fine interstitial pores; 30 percent gravel and 20 percent cobbles; neutral (pH 6.6); clear wavy boundary.

TYPE LOCATION: Summit County, Utah; about 1 mile north of Burts-Miller Ranch; located about 1,800 feet North and 300 feet east of the southwest corner of sec. 17, T. 3 N., R. 10 E.; Deadman Mountain, Utah-Wyoming USGS quad; lat. 40 degrees 59 minutes 40 seconds N. and long. 110 degrees 50 minutes 45 seconds W., NAD 1927

RANGE IN CHARACTERISTICS: (Depths given are measured from the mineral soil surface)
Soil moisture regime: Aquic
Mean annual soil temperature: 37 to 42 degrees F.
Mean summer soil temperature: 40 to 43 degrees F.
Depth to redox concentrations: 0 to 20 inches
Thickness of the mollic epipedon: 16 to 40 inches
Depth to endosaturation: 10 to 20 inches in March through May

Particle-size control section:
Upper part: Clay content: 18 to 27 percent
Rock fragment content: 0 to 15 percent

Lower part: Clay content: 0 to 10 percent
Rock fragment content: 35 to 60 percent, dominantly cobble

A horizon:
Hue: 10YR
Value: 2 or 3 moist; 3 or 4 dry
Chroma: 1 or 2 moist and dry
Rock fragments: 0 to 15 percent
Reaction: Moderately acid to neutral

2C horizon:
Value: 4 or 5 moist, 6 or 7 dry
Chroma: 1 to 2 moist and dry
Texture: Stratified very gravelly loamy sand to very cobbly loamy sand
Rock fragments: 35 to 60 percent
Reaction: Moderately acid to neutral

COMPETING SERIES: These are the Kilgore (CO) and Lemhi (T ID) series.
Kilgore: dominantly gravel sized rock fragments in the lower part; the soil moisture regime is bordering on ustic.
Lemhi: has horizons of secondary carbonates and the reaction throughout the soil is slightly or moderately alkaline.

GEOGRAPHIC SETTING: Hovarka soils.
Parent material: Alluvium derived from sandstone and quartzite.
Landform: Flood plains
Slopes: 0 to 2 percent
Elevation: 7,800 to 9,400 feet
Mean annual air temperature: 35 to 40 degrees F.
Mean annual precipitation: 22 to 35 inches.
Wettest months: March through May.
Driest months: July through September.
Frost-free period: 20 to 60 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Duchesne and Millcreek series.
Duchesne: Well drained soils on mountain slopes
Millcreek: Moderately well drained soils in flood plains

DRAINAGE AND PERMEABILITY: Poorly drained, slow runoff, moderate over very rapid permeability. These soils are frequently flooded for brief periods during the months of March through May.

USE AND VEGETATION: The major uses are rangeland and wildlife habitat. Vegetation is sedges, rushes, grass and clover.

DISTRIBUTION AND EXTENT: North Central Utah LRR E, MLRA 47. This series is of minor extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana

SERIES ESTABLISHED: Summit County, Utah. 2000; Summit Area soil survey. The name is from Hovarka canal in Summit County.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: The zone from 4 to 32 inches. (A1 and A2 horizons)
Redoximorphic features: Redox concentrations from 4 to 36 inches (A1 and A2 horizons).
Endosaturation: The presence of an apparent water table from 10 to 20 inches during the months of March through May.

Keys to Soil Taxonomy: Eighth Edition, 1998.


National Cooperative Soil Survey
U.S.A.