LOCATION GREENVALLEY             CO

Tentative Series
PRR, KLS
02/2025

GREENVALLEY SERIES

Depth class: Deep
Drainage class: Well drained
Saturated hydraulic conductivity: High
Parent material: Thick coarse-loamy human-transported material over eolian sands derived from glaciofluvial sources
Geomorphic location: Human-transported fill on sand sheets of sand-mantled plains, sand sheets of Pleistocene strath terraces, interdunes or dunes
Slope range: 0 to 15 percent
Mean annual temperature: 11.0 degrees C (51.8 degrees F)
Mean annual precipitation: 406 millimeters (16.0 inches)

Taxonomic Class:
Coarse-loamy, spolic, mixed, superactive, nonacid, mesic Anthroportic Ustorthents

Typical Pedon:
Greenvalley sandy loam in urban, park. (Colors are for dry soil unless otherwise noted.)

^A--0 to 11 cm; sandy loam, very dark brown (7.5YR 2.5/2) moist; moderate fine granular structure; very friable, slightly sticky, nonplastic; common very fine roots throughout; 2 percent yellowish red (5YR 4/6) masses of oxidized iron; noneffervescent; moderately alkaline (pH 7.4); Redox features are from anthropogenic causes: grass/sod irrigation in the park.; clear smooth boundary.

^C1--11 to 55 cm; sandy loam, dark brown (10YR 3/3) moist; moderate medium and coarse subangular blocky structure; friable, slightly sticky, nonplastic; common very fine roots throughout; 2 percent fine and medium gravel; noneffervescent; slightly alkaline (pH 7.6); gradual boundary.

^C2--55 to 117 cm; sandy loam, dark brown (10YR 3/3) moist; weak fine medium subangular blocky structure; friable, nonsticky, nonplastic; noneffervescent;slightly alkaline (pH 7.4); gradual boundary.

^C3--117 to 148 cm; sandy loam, brown (10YR 4/3) moist; massive; friable, slightly sticky, nonplastic; noneffervescent; slightly alkaline (pH 7.4); gradual boundary.

^C4--148 to 191 cm; sandy loam, 85 percent dark yellowish brown (10YR 4/4) and 15 percent brown (10YR 4/3) moist; massive; very friable, nonsticky, nonplastic; noneffervescent; slightly alkaline (pH 7.6); this horizon has more fine sand than horizons above.

Type Location:
Denver County, CO
USGS Quadrangle: Sable
Latitude: 39.7824750
Longitude: -104.8256806
Datum: WGS84
Coordinates sources: Hand-held GPS

Range in Characteristics:
Depth to secondary carbonates--more than 100 centimeters
Thickness of human-transported material--51 centimeters to more than 100 centimeters
Particle-size control section (weighted average):
Clay content--5 to 18 percent
Sand content--40 to 90 percent
Total rock fragments--0 to 5 percent

^A horizon:
Hue--7.5YR or 10YR
Value--3 or 4 dry; 2 or 3 moist
Chroma--2 or 3 dry; 1 or 2 moist
Texture (less than 2 mm fraction)--loam, sandy loam, sandy clay loam
Clay content--10 to 25 percent
Rock fragments--0 to 5 percent gravel, fine- and medium-size
Reaction--pH 7.0 to 7.6
Thickness--5 to 20 centimeters

^C or ^Cu horizon(s):
Hue--7.5YR or 10YR
Value--3 to 6 dry; 2 to 5 moist
Chroma--2 to 5 dry; 1 to 6 moist
Texture (less than 2 mm fraction)--sandy loam, loamy sand, fine sandy loam, sand, sandy clay loam
Clay content--2 to 25 percent
Rock fragments--0 to 10 percent gravel, fine- and medium-size
Reaction--pH 7.0 to 7.6
Thickness--10 to 125 centimeters

Some pedons may have 2Bw or 2C horizons:
Hue--10YR
Value--4 to 6 dry; 4 or 5 moist
Chroma--3 or 4 dry; 3 or 4 moist
Texture (less than 2 mm fraction)--sandy loam, loamy fine sand, fine sandy loam, loam, silt loam, sandy clay loam
Clay content--4 to 28 percent
Rock fragments--0 to 5 percent gravel, fine- and medium-size
Calcium carbonate equivalent--0 to 3 percent
Reaction--pH 7.4 to 8.0
Thickness--20 to 135 centimeters

Competing Series:
There are currently no competing series.

Geographic Settings:
Parent material--Thick coarse-loamy human-transported material over eolian sands derived from glaciofluvial sources
Landform-- Human-transported fill on sand sheets of sand-mantled plains, sand sheets of Pleistocene strath terraces, interdunes or dunes
Slope ranges--0 to 15 percent
Mean annual air temperature--10.0 to 12.0 degrees C (50.0 to 53.6 degrees F)
Mean annual precipitation range--356 to 432 millimeters (14.0 to 17.0 inches)
Frost-free period--135 to 165 days
Elevation--1,580 to 1,720 meters (~5,182 to 5,642 feet)
Climate--continental, temperate, semi-arid; very cold and snowy winters; cool, moist springs, hot summers, with North American monsoon precipitation from July through August.

Geographically Associated Soils:
Vona soils: In similar landscape positions and form in similar parent materials but less than 50 cm of human-transported fill on the surface.

Drainage and Saturated Hydraulic Conductivity:
Drainage class: Well drained
Saturated hydraulic conductivity: High (15 to 50 m/sec)
Flooding: Greenvalley soils are not subject to flooding
Ponding: Greenvalley soils are not subject to ponding

Use and Vegetation:
Most areas are primarily used for urban development. The potential native vegetation is little bluestem, sideoats grama, winterfat, and skunkbush sumac .

Distribution and Extent:
Interdunes, dunes, and sand sheets that occur on the dunefield northeast of Sand Creek; small extent in north-central Colorado; MLRA 67B.

Soil Survey Region (SSR) Responsible:
Bozeman, Montana

Series Proposed:
Denver County, CO 2025. Greenvalley series is named after a neighborhood in northeast Denver where these soils are found.

Remarks:
Typical Pedon Taxonomic Features:
Ochric epipedon--0 to 11 centimeters (^A horizon)
Human-transported materials--0 to 191 centimeters (^A, ^C1 through ^C4 horizons)
Lithologic discontinuity--11 centimeters
Particle-size control section--25 to 100 centimeters
Taxonomic version: Keys to Soil Taxonomy, 13th edition, (2022)

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National Cooperative Soil Survey
U.S.A.