LOCATION VANDEVENTER MO
Tentative Series
IRD. RET-RSA-EED
07/2026
VANDEVENTER SERIES
Depth class: Very deep
Drainage class: Well drained
Saturated hydraulic conductivity: Moderately high to high
Parent material: Human-transported material mostly derived from nearby loess deposits and overlies Peoria loess, where it is present.
Geomorphic location: Leveled land and fills on hillslopes and interfluves of hills
Slope range: 0 to 10
Mean annual temperature: 12 degrees C
Mean annual precipitation: 1050 millimeters
TAXONOMIC CLASS: Loamy-skeletal, artifactic, mixed, superactive, nonacid, mesic Anthroportic Udorthents
TYPICAL PEDON: Vandeventer silt loam, 2 percent slope on a former residential lot where human artifacts from the demolition of buildings are buried and the site was leveled. Site currently utilized as a community garden. (Colors are for moist soil unless otherwise noted.)
^Au--0 to 22 centimeters; 80 percent dark yellowish brown (10YR 4/6) and 20 percent dark yellowish brown (10YR 3/6) silt loam; weak fine subangular blocky parting to moderate thin platy structure; friable; many very fine roots and common fine roots throughout; common very fine interstitial, many fine interstitial, and common fine dendritic tubular pores; 3 percent fine prominent gray (10YR 6/1), moist, relict iron depletions; 2 percent gravel-sized brick fragments; neutral (6.6 pH); abrupt smooth boundary (6 to 24 centimeters thick)
^Cu1--22 to 34 centimeters; 60 percent light gray (7.5YR 7/1) and 20 percent dark yellowish brown (10YR 3/4) and 20 percent dark yellowish brown (10YR 4/6) extremely artifactual loam; massive; firm; common very fine roots throughout; common very fine dendritic tubular pores; 3 percent gravel-sized bitumen (asphalt) fragments, 40 percent gravel-sized brick fragments, and 20 percent gravel-sized concrete fragments; slightly alkaline (7.7 pH); abrupt smooth boundary
^Cu2--34 to 45 centimeters; dark yellowish brown (10YR 3/4) very artifactual silty clay loam; relict weak medium subangular blocky structure; firm; few fine roots throughout; common very fine interstitial pores; 20 percent fine distinct yellowish brown (10YR 5/6), moist, iron-manganese masses throughout; 5 percent gravel-sized bitumen (asphalt) fragments, 10 percent gravel-sized concrete fragments, and 30 percent gravel-sized brick fragments; slightly alkaline (7.7 pH); clear smooth boundary.
^Cu3--45 to 65 centimeters; 90 percent brown (10YR 4/3) and 10 percent dark yellowish brown (10YR 4/6) extremely artifactual loamy sand; massive; firm; common very fine roots throughout; few very fine interstitial pores; 25 percent gravel-sized concrete fragments, 10 percent gravel-sized bitumen (asphalt) fragments, and 35 percent by volume gravel-sized brick fragments; moderately alkaline (8.1 pH); clear smooth boundary
^Cu4--65 to 93 centimeters; 50 percent dark brown (10YR 3/3) and 50 percent dark yellowish brown (10YR 3/4) very artifactual sandy loam; massive; firm; few very fine roots throughout and very few (0.1) medium roots throughout; few very fine interstitial pores; 2 percent channer-sized glass fragments, 3 gravel sized untreated wood fragments, 5 percent gravel-sized bitumen (asphalt) fragments, 10 percent gravel-sized concrete fragments, and 35 percent gravel-sized brick; moderately alkaline (8.0 pH); clear smooth boundary
^Cu5--93 to 118 centimeters; 80 percent dark brown (10YR 3/3) and 20 percent dark yellowish brown (10YR 4/6) very artifactual silty clay loam; massive; firm; few very fine roots throughout; few very fine vesicular pores; 5 percent cobble-sized concrete fragments, 12 percent gravel-sized brick fragments, and 20 percent gravel-sized bitumen (asphalt)fragments; slightly alkaline (7.6 pH); gradual wavy boundary (Combined thickness of ^C horizons is greater than 95 centimeters)
2C1--118 to 154 centimeters; 70 percent dark brown (10YR 3/3) and 20 percent dark yellowish brown (10YR 3/4) and 10 percent dark yellowish brown (10YR 3/6) silty clay loam; massive; firm; prominent light gray (10YR 7/2), dry, silt coats; 2 percent very fine distinct black (10YR 2/1) manganese masses and 3 percent fine distinct gray (10YR 6/1) iron depletions; neutral (7.1 pH); clear smooth boundary
2C2--154 to 200 centimeters (60.6 to 78.7 inches); 80 percent dark yellowish brown (10YR 3/4) and 20 percent dark yellowish brown (10YR 4/6) silty clay loam; massive; firm; 2 percent very fine distinct black (10YR 2/1) manganese masses; neutral (6.7 pH)
TYPE LOCATION:
St. Louis County, Missouri; in a demolition site of a commercial building which has been repurposed into a community garden between Delmar Boulevard and Grandel Square.
USGS Quadrangle: Granite City, IL-MO
Latitude: 38.6414100
Longitude: -90.2330600
Datum: WGS84
Coordinate source: From hand-held GPS
RANGE IN CHARACTERISTICS:
Thickness of human-transported materials: Greater than 100 centimeters
Depth to bedrock: Greater than 200 centimeters
Depth to seasonal high-water table: Greater than 100 centimeters
Combined rock and discrete artifact content: 35 to 80 percent
Soil reaction: slightly acid to moderately alkaline (6.1 to 8.3 pH)
Particle-size control section (weighted average):
Clay content--10 to 35 percent
Sand content--10 to 70 percent
Artifact content--35 to 80 percent
Special feature--Some pedons have a manufactured layer, consisting of a continuous layer of concrete from a demolished structure. The manufactured layer is typically observed at a depth greater than 100 cm.
^A(u) horizons:
Hue--10YR or 7.5YR
Value--2 to 4
Chroma--2 to 6
Texture--silt loam or silty clay loam
Rock fragment content--0 to 5 percent
Artifact content--0 to 30 percent
^C(u) horizons:
Hue--10YR or 7.5YR
Value--2 to 7
Chroma--1 to 8
Texture of the fine earth fraction-- silt loam, silty clay loam, clay loam, loam, sandy loam, or loamy sand
Rock fragments--0 to 5 percent
Artifact content--35 to 80 percent, individual horizons may have less than 35 percent
2C or 2B horizon (when present):
Hue--5YR to 10YR
Value--3 or 4
Chroma--2 to 6
Texture--silt loam or silty clay loam
COMPETING SERIES: These are the
Sauken soils.
Sauken soils have aquic conditions within 100cm of the soil surface, typically contain glauconite pellets, and are typically formed in filled marshlands and drainageways.
GEOGRAPHIC SETTING:
Parent material: Human-transported material over loess
Landscape: Hills
Landform: Hillslopes and interfluves
Anthropogenic landform: Leveled land where demolition of human structures and subsequent grading of soil and burying human artifacts has occurred.
Slope: 0 to 12 percent
Elevation: 120 to 250 meters
Frost-free period: 184 to 228 days
Mean annual temperature: 11 to 14 degrees C
Mean annual precipitation: 940 to 1194 millimeters
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Harvester,
Shaw, and
Winfield soils.
Harvester soils have less than 15 percent by volume human artifacts in the particle size control section; found on similar anthropogenic landforms.
Shaw soils have aquic conditions as high as 40 centimeters from the surface and have fewer human artifacts in the control section; found on similar anthropogenic landforms.
Winfield soils do not have human-transported materials and are formed in loess that is both native and intact; found on hillslopes and interfluves.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage Class: Moderately well drained
Surface Runoff: Medium
Saturated Hydraulic Conductivity Class: Moderately high except where compacted
Flooding: None
Ponding: None
USE AND VEGETATION:
Major uses are for residential, commercial, and recreational applications in an urban setting. Vegetation may include managed and unmanaged plant communities with a mix of native and non-native species. Many areas are vegetated with non-native ornamental landscaping or turfgrass. Some areas exhibit weedy, invasive, and primary succession vegetation communities (e.g., abandoned lots and other unmanaged areas).
DISTRIBUTION AND EXTENT:
Urban and other areas with human-modified landscapes in the Central Feed Grains and Livestock Region, Major Land Resource Area 115. These soils are of moderate extent.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Raleigh, North Carolina (Special Projects Office)
SERIES PROPOSED: St. Louis County, Missouri, 2026
REMARKS:
Typical Pedon Taxonomic Features:
Ochric epipedon--The zone from 0 to 22 centimeters
Human-transported material--The zone from 0 to 118 centimeters
Lithologic discontinuity--At a depth of 118 centimeters
Particle-size control section--The zone from 25 to 100 centimeters
Taxonomic Version: Keys to Soil Taxonomy, 13th Edition (2022)
Other: Vandeventer is named after a major road running east to west across northern parts of St. Louis, Missouri.
ADDITIONAL DATA:
NASIS User Pedon ID: 2023MO510060
National Cooperative Soil Survey
U.S.A.