LOCATION GREENVALLEY             CO

Established Series
PRR-KLS-EED
03/2026

GREENVALLEY SERIES

Depth class: Very deep
Drainage class: Well drained
Saturated hydraulic conductivity: High
Parent material: Thick coarse-loamy human-transported material over eolian sediments derived from glaciofluvial sources
Geomorphic location: Fills 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
Mean annual precipitation: 405 millimeters

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) relict masses of oxidized iron; noneffervescent; slightly alkaline (pH 7.4); clear smooth boundary (5 to 20 centimeters thick)

^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, Colorado; located in the southern area of Montbello Park
USGS Quadrangle: Sable, Colorado
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--greater than 50 centimeters
Depth to bedrock: Greater than 150 centimeters
Soil reaction: Neutral to moderately alkaline (pH 7.0 to 8.0)
Particle-size control section (weighted average):
Clay content--5 to 18 percent
Sand content--40 to 90 percent
Total rock fragments--0 to 15 percent
Artifact content-- Less than 10 percent, by volume, some individual horizons have more than 10 percent artifacts

^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
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
Reaction--pH 7.0 to 7.6
Thickness--10 to 125 centimeters

2Btb or 2C horizons when present:
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
Calcium carbonate equivalent--0 to 3 percent
Reaction--pH 7.4 to 8.0
Thickness--20 to 135 centimeters

COMPETING SERIES:
These are the Milehigh soils which formed in greater than 75 centimeters of human-transported material over mixed Holocene-aged alluvial sediments and may have buried cambic horizons.

GEOGRAPHIC SETTINGS:
Parent material--Thick coarse-loamy human-transported material over eolian sands derived from glaciofluvial sources
Landform--Fills 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
Mean annual precipitation range--356 to 432 millimeters
Frost-free period--135 to 165 days
Elevation--1,580 to 1,720 meters
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 formed on similar landscape positions and do not have human-transported material in the upper part of the profile.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: Well drained
Saturated hydraulic conductivity: High (15 to 50 m/sec)
Flooding: None
Ponding: None

Some pedons may have a brief seasonal water table below 80 centimeters.

USE AND VEGETATION:
Most areas are primarily used for urban development. Vegetation may include a mix of managed and unmanaged plant communities with a variety of native and non-native species. Many areas are vegetated with non-native ornamental landscaping and/or turfgrass associated with developed land uses. Some areas may exhibit weedy, invasive, and/or primary succession vegetation communities (e.g., abandoned lots and other unmanaged areas). The potential native vegetation is little bluestem, sideoats grama, winterfat, and skunkbush sumac .

DISTRIBUTION AND EXTENT:
Urban and other areas with human-modified landscapes on interdunes, dunes, and sand sheets that occur northeast of Sand Creek in the vicinity of Denver in north-central Colorado. MLRA 67B - Central High Plains, Southern Part. These soils are of small extent.

SOIL SURVEY REGION (SSR) RESPONSIBLE: Raleigh, North Carolina (Special Projects Office)

SERIES ESTABLISHED: Denver County, Colorado 2025.

REMARKS:
Typical Pedon Taxonomic Features:
Ochric epipedon--The zone from 0 to 11 centimeters (^A horizon)
Human-transported materials--The zone from 0 to 191 centimeters (^A, ^C1 through ^C4 horizons)
Particle-size control section--The zone from 25 to 100 centimeters
Taxonomic version: Keys to Soil Taxonomy, 13th edition, (2022)
Other: Greenvalley name from a neighborhood in northeast Denver where these soils are found.

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National Cooperative Soil Survey
U.S.A.